drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 /*
  31  * NOTE:  This file (iwl-base.c) is used to build to multiple hardware targets
  32  * by defining IWL to either 3945 or 4965.  The Makefile used when building
  33  * the base targets will create base-3945.o and base-4965.o
  34  *
  35  * The eventual goal is to move as many of the #if IWL / #endif blocks out of
  36  * this file and into the hardware specific implementation files (iwl-XXXX.c)
  37  * and leave only the common (non #ifdef sprinkled) code in this file
  38  */
  39
  40 #include <linux/kernel.h>
  41 #include <linux/module.h>
  42 #include <linux/version.h>
  43 #include <linux/init.h>
  44 #include <linux/pci.h>
  45 #include <linux/dma-mapping.h>
  46 #include <linux/delay.h>
  47 #include <linux/skbuff.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/wireless.h>
  50 #include <linux/firmware.h>
  51 #include <linux/etherdevice.h>
  52 #include <linux/if_arp.h>
  53
  54 #include <net/ieee80211_radiotap.h>
  55 #include <net/mac80211.h>
  56
  57 #include <asm/div64.h>
  58
  59 #define IWL 3945
  60
  61 #include "iwlwifi.h"
  62 #include "iwl-3945.h"
  63 #include "iwl-helpers.h"
  64
  65 #ifdef CONFIG_IWLWIFI_DEBUG
  66 u32 iwl_debug_level;
  67 #endif
  68
  69 /******************************************************************************
  70  *
  71  * module boiler plate
  72  *
  73  ******************************************************************************/
  74
  75 /* module parameters */
  76 int iwl_param_disable_hw_scan;
  77 int iwl_param_debug;
  78 int iwl_param_disable;      /* def: enable radio */
  79 int iwl_param_antenna;      /* def: 0 = both antennas (use diversity) */
  80 int iwl_param_hwcrypto;     /* def: using software encryption */
  81 int iwl_param_qos_enable = 1;
  82 int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
  83
  84 /*
  85  * module name, copyright, version, etc.
  86  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  87  */
  88
  89 #define DRV_DESCRIPTION \
  90 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  91
  92 #ifdef CONFIG_IWLWIFI_DEBUG
  93 #define VD "d"
  94 #else
  95 #define VD
  96 #endif
  97
  98 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
  99 #define VS "s"
 100 #else
 101 #define VS
 102 #endif
 103
 104 #define IWLWIFI_VERSION "1.1.17k" VD VS
 105 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
 106 #define DRV_VERSION     IWLWIFI_VERSION
 107
 108 /* Change firmware file name, using "-" and incrementing number,
 109  *   *only* when uCode interface or architecture changes so that it
 110  *   is not compatible with earlier drivers.
 111  * This number will also appear in << 8 position of 1st dword of uCode file */
 112 #define IWL3945_UCODE_API "-1"
 113
 114 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 115 MODULE_VERSION(DRV_VERSION);
 116 MODULE_AUTHOR(DRV_COPYRIGHT);
 117 MODULE_LICENSE("GPL");
 118
 119 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 120 {
 121         u16 fc = le16_to_cpu(hdr->frame_control);
 122         int hdr_len = ieee80211_get_hdrlen(fc);
 123
 124         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 125                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 126         return NULL;
 127 }
 128
 129 static const struct ieee80211_hw_mode *iwl_get_hw_mode(
 130                 struct iwl_priv *priv, int mode)
 131 {
 132         int i;
 133
 134         for (i = 0; i < 3; i++)
 135                 if (priv->modes[i].mode == mode)
 136                         return &priv->modes[i];
 137
 138         return NULL;
 139 }
 140
 141 static int iwl_is_empty_essid(const char *essid, int essid_len)
 142 {
 143         /* Single white space is for Linksys APs */
 144         if (essid_len == 1 && essid[0] == ' ')
 145                 return 1;
 146
 147         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 148         while (essid_len) {
 149                 essid_len--;
 150                 if (essid[essid_len] != '\0')
 151                         return 0;
 152         }
 153
 154         return 1;
 155 }
 156
 157 static const char *iwl_escape_essid(const char *essid, u8 essid_len)
 158 {
 159         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 160         const char *s = essid;
 161         char *d = escaped;
 162
 163         if (iwl_is_empty_essid(essid, essid_len)) {
 164                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 165                 return escaped;
 166         }
 167
 168         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 169         while (essid_len--) {
 170                 if (*s == '\0') {
 171                         *d++ = '\\';
 172                         *d++ = '0';
 173                         s++;
 174                 } else
 175                         *d++ = *s++;
 176         }
 177         *d = '\0';
 178         return escaped;
 179 }
 180
 181 static void iwl_print_hex_dump(int level, void *p, u32 len)
 182 {
 183 #ifdef CONFIG_IWLWIFI_DEBUG
 184         if (!(iwl_debug_level & level))
 185                 return;
 186
 187         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 188                         p, len, 1);
 189 #endif
 190 }
 191
 192 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 193  * DMA services
 194  *
 195  * Theory of operation
 196  *
 197  * A queue is a circular buffers with 'Read' and 'Write' pointers.
 198  * 2 empty entries always kept in the buffer to protect from overflow.
 199  *
 200  * For Tx queue, there are low mark and high mark limits. If, after queuing
 201  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 202  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 203  * Tx queue resumed.
 204  *
 205  * The IWL operates with six queues, one receive queue in the device's
 206  * sram, one transmit queue for sending commands to the device firmware,
 207  * and four transmit queues for data.
 208  ***************************************************/
 209
 210 static int iwl_queue_space(const struct iwl_queue *q)
 211 {
 212         int s = q->last_used - q->first_empty;
 213
 214         if (q->last_used > q->first_empty)
 215                 s -= q->n_bd;
 216
 217         if (s <= 0)
 218                 s += q->n_window;
 219         /* keep some reserve to not confuse empty and full situations */
 220         s -= 2;
 221         if (s < 0)
 222                 s = 0;
 223         return s;
 224 }
 225
 226 /* XXX: n_bd must be power-of-two size */
 227 static inline int iwl_queue_inc_wrap(int index, int n_bd)
 228 {
 229         return ++index & (n_bd - 1);
 230 }
 231
 232 /* XXX: n_bd must be power-of-two size */
 233 static inline int iwl_queue_dec_wrap(int index, int n_bd)
 234 {
 235         return --index & (n_bd - 1);
 236 }
 237
 238 static inline int x2_queue_used(const struct iwl_queue *q, int i)
 239 {
 240         return q->first_empty > q->last_used ?
 241                 (i >= q->last_used && i < q->first_empty) :
 242                 !(i < q->last_used && i >= q->first_empty);
 243 }
 244
 245 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
 246 {
 247         if (is_huge)
 248                 return q->n_window;
 249
 250         return index & (q->n_window - 1);
 251 }
 252
 253 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
 254                           int count, int slots_num, u32 id)
 255 {
 256         q->n_bd = count;
 257         q->n_window = slots_num;
 258         q->id = id;
 259
 260         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 261          * and iwl_queue_dec_wrap are broken. */
 262         BUG_ON(!is_power_of_2(count));
 263
 264         /* slots_num must be power-of-two size, otherwise
 265          * get_cmd_index is broken. */
 266         BUG_ON(!is_power_of_2(slots_num));
 267
 268         q->low_mark = q->n_window / 4;
 269         if (q->low_mark < 4)
 270                 q->low_mark = 4;
 271
 272         q->high_mark = q->n_window / 8;
 273         if (q->high_mark < 2)
 274                 q->high_mark = 2;
 275
 276         q->first_empty = q->last_used = 0;
 277
 278         return 0;
 279 }
 280
 281 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
 282                               struct iwl_tx_queue *txq, u32 id)
 283 {
 284         struct pci_dev *dev = priv->pci_dev;
 285
 286         if (id != IWL_CMD_QUEUE_NUM) {
 287                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 288                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 289                 if (!txq->txb) {
 290                         IWL_ERROR("kmalloc for auxilary BD "
 291                                   "structures failed\n");
 292                         goto error;
 293                 }
 294         } else
 295                 txq->txb = NULL;
 296
 297         txq->bd = pci_alloc_consistent(dev,
 298                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 299                         &txq->q.dma_addr);
 300
 301         if (!txq->bd) {
 302                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 303                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 304                 goto error;
 305         }
 306         txq->q.id = id;
 307
 308         return 0;
 309
 310  error:
 311         if (txq->txb) {
 312                 kfree(txq->txb);
 313                 txq->txb = NULL;
 314         }
 315
 316         return -ENOMEM;
 317 }
 318
 319 int iwl_tx_queue_init(struct iwl_priv *priv,
 320                       struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
 321 {
 322         struct pci_dev *dev = priv->pci_dev;
 323         int len;
 324         int rc = 0;
 325
 326         /* alocate command space + one big command for scan since scan
 327          * command is very huge the system will not have two scan at the
 328          * same time */
 329         len = sizeof(struct iwl_cmd) * slots_num;
 330         if (txq_id == IWL_CMD_QUEUE_NUM)
 331                 len +=  IWL_MAX_SCAN_SIZE;
 332         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 333         if (!txq->cmd)
 334                 return -ENOMEM;
 335
 336         rc = iwl_tx_queue_alloc(priv, txq, txq_id);
 337         if (rc) {
 338                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 339
 340                 return -ENOMEM;
 341         }
 342         txq->need_update = 0;
 343
 344         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 345          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 346         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 347         iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 348
 349         iwl_hw_tx_queue_init(priv, txq);
 350
 351         return 0;
 352 }
 353
 354 /**
 355  * iwl_tx_queue_free - Deallocate DMA queue.
 356  * @txq: Transmit queue to deallocate.
 357  *
 358  * Empty queue by removing and destroying all BD's.
 359  * Free all buffers.  txq itself is not freed.
 360  *
 361  */
 362 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 363 {
 364         struct iwl_queue *q = &txq->q;
 365         struct pci_dev *dev = priv->pci_dev;
 366         int len;
 367
 368         if (q->n_bd == 0)
 369                 return;
 370
 371         /* first, empty all BD's */
 372         for (; q->first_empty != q->last_used;
 373              q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
 374                 iwl_hw_txq_free_tfd(priv, txq);
 375
 376         len = sizeof(struct iwl_cmd) * q->n_window;
 377         if (q->id == IWL_CMD_QUEUE_NUM)
 378                 len += IWL_MAX_SCAN_SIZE;
 379
 380         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 381
 382         /* free buffers belonging to queue itself */
 383         if (txq->q.n_bd)
 384                 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
 385                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 386
 387         if (txq->txb) {
 388                 kfree(txq->txb);
 389                 txq->txb = NULL;
 390         }
 391
 392         /* 0 fill whole structure */
 393         memset(txq, 0, sizeof(*txq));
 394 }
 395
 396 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 397
 398 /*************** STATION TABLE MANAGEMENT ****
 399  *
 400  * NOTE:  This needs to be overhauled to better synchronize between
 401  * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
 402  *
 403  * mac80211 should also be examined to determine if sta_info is duplicating
 404  * the functionality provided here
 405  */
 406
 407 /**************************************************************/
 408 #if 0 /* temparary disable till we add real remove station */
 409 static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 410 {
 411         int index = IWL_INVALID_STATION;
 412         int i;
 413         unsigned long flags;
 414
 415         spin_lock_irqsave(&priv->sta_lock, flags);
 416
 417         if (is_ap)
 418                 index = IWL_AP_ID;
 419         else if (is_broadcast_ether_addr(addr))
 420                 index = priv->hw_setting.bcast_sta_id;
 421         else
 422                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 423                         if (priv->stations[i].used &&
 424                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 425                                                 addr)) {
 426                                 index = i;
 427                                 break;
 428                         }
 429
 430         if (unlikely(index == IWL_INVALID_STATION))
 431                 goto out;
 432
 433         if (priv->stations[index].used) {
 434                 priv->stations[index].used = 0;
 435                 priv->num_stations--;
 436         }
 437
 438         BUG_ON(priv->num_stations < 0);
 439
 440 out:
 441         spin_unlock_irqrestore(&priv->sta_lock, flags);
 442         return 0;
 443 }
 444 #endif
 445 static void iwl_clear_stations_table(struct iwl_priv *priv)
 446 {
 447         unsigned long flags;
 448
 449         spin_lock_irqsave(&priv->sta_lock, flags);
 450
 451         priv->num_stations = 0;
 452         memset(priv->stations, 0, sizeof(priv->stations));
 453
 454         spin_unlock_irqrestore(&priv->sta_lock, flags);
 455 }
 456
 457
 458 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
 459 {
 460         int i;
 461         int index = IWL_INVALID_STATION;
 462         struct iwl_station_entry *station;
 463         unsigned long flags_spin;
 464         DECLARE_MAC_BUF(mac);
 465         u8 rate;
 466
 467         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 468         if (is_ap)
 469                 index = IWL_AP_ID;
 470         else if (is_broadcast_ether_addr(addr))
 471                 index = priv->hw_setting.bcast_sta_id;
 472         else
 473                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 474                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 475                                                 addr)) {
 476                                 index = i;
 477                                 break;
 478                         }
 479
 480                         if (!priv->stations[i].used &&
 481                             index == IWL_INVALID_STATION)
 482                                 index = i;
 483                 }
 484
 485         /* These twh conditions has the same outcome but keep them separate
 486           since they have different meaning */
 487         if (unlikely(index == IWL_INVALID_STATION)) {
 488                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 489                 return index;
 490         }
 491
 492         if (priv->stations[index].used &&
 493            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 494                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 495                 return index;
 496         }
 497
 498         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 499         station = &priv->stations[index];
 500         station->used = 1;
 501         priv->num_stations++;
 502
 503         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 504         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 505         station->sta.mode = 0;
 506         station->sta.sta.sta_id = index;
 507         station->sta.station_flags = 0;
 508
 509         rate = (priv->phymode == MODE_IEEE80211A) ? IWL_RATE_6M_PLCP :
 510                                 IWL_RATE_1M_PLCP | priv->hw_setting.cck_flag;
 511
 512         /* Turn on both antennas for the station... */
 513         station->sta.rate_n_flags =
 514                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 515         station->current_rate.rate_n_flags =
 516                         le16_to_cpu(station->sta.rate_n_flags);
 517
 518         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 519         iwl_send_add_station(priv, &station->sta, flags);
 520         return index;
 521
 522 }
 523
 524 /*************** DRIVER STATUS FUNCTIONS   *****/
 525
 526 static inline int iwl_is_ready(struct iwl_priv *priv)
 527 {
 528         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 529          * set but EXIT_PENDING is not */
 530         return test_bit(STATUS_READY, &priv->status) &&
 531                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 532                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 533 }
 534
 535 static inline int iwl_is_alive(struct iwl_priv *priv)
 536 {
 537         return test_bit(STATUS_ALIVE, &priv->status);
 538 }
 539
 540 static inline int iwl_is_init(struct iwl_priv *priv)
 541 {
 542         return test_bit(STATUS_INIT, &priv->status);
 543 }
 544
 545 static inline int iwl_is_rfkill(struct iwl_priv *priv)
 546 {
 547         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 548                test_bit(STATUS_RF_KILL_SW, &priv->status);
 549 }
 550
 551 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
 552 {
 553
 554         if (iwl_is_rfkill(priv))
 555                 return 0;
 556
 557         return iwl_is_ready(priv);
 558 }
 559
 560 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 561
 562 #define IWL_CMD(x) case x : return #x
 563
 564 static const char *get_cmd_string(u8 cmd)
 565 {
 566         switch (cmd) {
 567                 IWL_CMD(REPLY_ALIVE);
 568                 IWL_CMD(REPLY_ERROR);
 569                 IWL_CMD(REPLY_RXON);
 570                 IWL_CMD(REPLY_RXON_ASSOC);
 571                 IWL_CMD(REPLY_QOS_PARAM);
 572                 IWL_CMD(REPLY_RXON_TIMING);
 573                 IWL_CMD(REPLY_ADD_STA);
 574                 IWL_CMD(REPLY_REMOVE_STA);
 575                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 576                 IWL_CMD(REPLY_3945_RX);
 577                 IWL_CMD(REPLY_TX);
 578                 IWL_CMD(REPLY_RATE_SCALE);
 579                 IWL_CMD(REPLY_LEDS_CMD);
 580                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 581                 IWL_CMD(RADAR_NOTIFICATION);
 582                 IWL_CMD(REPLY_QUIET_CMD);
 583                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 584                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 585                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 586                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 587                 IWL_CMD(POWER_TABLE_CMD);
 588                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 589                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 590                 IWL_CMD(REPLY_SCAN_CMD);
 591                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 592                 IWL_CMD(SCAN_START_NOTIFICATION);
 593                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 594                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 595                 IWL_CMD(BEACON_NOTIFICATION);
 596                 IWL_CMD(REPLY_TX_BEACON);
 597                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 598                 IWL_CMD(QUIET_NOTIFICATION);
 599                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 600                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 601                 IWL_CMD(REPLY_BT_CONFIG);
 602                 IWL_CMD(REPLY_STATISTICS_CMD);
 603                 IWL_CMD(STATISTICS_NOTIFICATION);
 604                 IWL_CMD(REPLY_CARD_STATE_CMD);
 605                 IWL_CMD(CARD_STATE_NOTIFICATION);
 606                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 607         default:
 608                 return "UNKNOWN";
 609
 610         }
 611 }
 612
 613 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 614
 615 /**
 616  * iwl_enqueue_hcmd - enqueue a uCode command
 617  * @priv: device private data point
 618  * @cmd: a point to the ucode command structure
 619  *
 620  * The function returns < 0 values to indicate the operation is
 621  * failed. On success, it turns the index (> 0) of command in the
 622  * command queue.
 623  */
 624 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 625 {
 626         struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 627         struct iwl_queue *q = &txq->q;
 628         struct iwl_tfd_frame *tfd;
 629         u32 *control_flags;
 630         struct iwl_cmd *out_cmd;
 631         u32 idx;
 632         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 633         dma_addr_t phys_addr;
 634         int pad;
 635         u16 count;
 636         int ret;
 637         unsigned long flags;
 638
 639         /* If any of the command structures end up being larger than
 640          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 641          * we will need to increase the size of the TFD entries */
 642         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 643                !(cmd->meta.flags & CMD_SIZE_HUGE));
 644
 645         if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 646                 IWL_ERROR("No space for Tx\n");
 647                 return -ENOSPC;
 648         }
 649
 650         spin_lock_irqsave(&priv->hcmd_lock, flags);
 651
 652         tfd = &txq->bd[q->first_empty];
 653         memset(tfd, 0, sizeof(*tfd));
 654
 655         control_flags = (u32 *) tfd;
 656
 657         idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
 658         out_cmd = &txq->cmd[idx];
 659
 660         out_cmd->hdr.cmd = cmd->id;
 661         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 662         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 663
 664         /* At this point, the out_cmd now has all of the incoming cmd
 665          * information */
 666
 667         out_cmd->hdr.flags = 0;
 668         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 669                         INDEX_TO_SEQ(q->first_empty));
 670         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 671                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 672
 673         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 674                         offsetof(struct iwl_cmd, hdr);
 675         iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 676
 677         pad = U32_PAD(cmd->len);
 678         count = TFD_CTL_COUNT_GET(*control_flags);
 679         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 680
 681         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 682                      "%d bytes at %d[%d]:%d\n",
 683                      get_cmd_string(out_cmd->hdr.cmd),
 684                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 685                      fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
 686
 687         txq->need_update = 1;
 688         q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
 689         ret = iwl_tx_queue_update_write_ptr(priv, txq);
 690
 691         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 692         return ret ? ret : idx;
 693 }
 694
 695 int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 696 {
 697         int ret;
 698
 699         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 700
 701         /* An asynchronous command can not expect an SKB to be set. */
 702         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 703
 704         /* An asynchronous command MUST have a callback. */
 705         BUG_ON(!cmd->meta.u.callback);
 706
 707         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 708                 return -EBUSY;
 709
 710         ret = iwl_enqueue_hcmd(priv, cmd);
 711         if (ret < 0) {
 712                 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
 713                           get_cmd_string(cmd->id), ret);
 714                 return ret;
 715         }
 716         return 0;
 717 }
 718
 719 int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 720 {
 721         int cmd_idx;
 722         int ret;
 723         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 724
 725         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 726
 727          /* A synchronous command can not have a callback set. */
 728         BUG_ON(cmd->meta.u.callback != NULL);
 729
 730         if (atomic_xchg(&entry, 1)) {
 731                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 732                           get_cmd_string(cmd->id));
 733                 return -EBUSY;
 734         }
 735
 736         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 737
 738         if (cmd->meta.flags & CMD_WANT_SKB)
 739                 cmd->meta.source = &cmd->meta;
 740
 741         cmd_idx = iwl_enqueue_hcmd(priv, cmd);
 742         if (cmd_idx < 0) {
 743                 ret = cmd_idx;
 744                 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
 745                           get_cmd_string(cmd->id), ret);
 746                 goto out;
 747         }
 748
 749         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 750                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 751                         HOST_COMPLETE_TIMEOUT);
 752         if (!ret) {
 753                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 754                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 755                                   get_cmd_string(cmd->id),
 756                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 757
 758                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 759                         ret = -ETIMEDOUT;
 760                         goto cancel;
 761                 }
 762         }
 763
 764         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 765                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 766                                get_cmd_string(cmd->id));
 767                 ret = -ECANCELED;
 768                 goto fail;
 769         }
 770         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 771                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 772                                get_cmd_string(cmd->id));
 773                 ret = -EIO;
 774                 goto fail;
 775         }
 776         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 777                 IWL_ERROR("Error: Response NULL in '%s'\n",
 778                           get_cmd_string(cmd->id));
 779                 ret = -EIO;
 780                 goto out;
 781         }
 782
 783         ret = 0;
 784         goto out;
 785
 786 cancel:
 787         if (cmd->meta.flags & CMD_WANT_SKB) {
 788                 struct iwl_cmd *qcmd;
 789
 790                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 791                  * TX cmd queue. Otherwise in case the cmd comes
 792                  * in later, it will possibly set an invalid
 793                  * address (cmd->meta.source). */
 794                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 795                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 796         }
 797 fail:
 798         if (cmd->meta.u.skb) {
 799                 dev_kfree_skb_any(cmd->meta.u.skb);
 800                 cmd->meta.u.skb = NULL;
 801         }
 802 out:
 803         atomic_set(&entry, 0);
 804         return ret;
 805 }
 806
 807 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 808 {
 809         /* A command can not be asynchronous AND expect an SKB to be set. */
 810         BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
 811                (cmd->meta.flags & CMD_WANT_SKB));
 812
 813         if (cmd->meta.flags & CMD_ASYNC)
 814                 return iwl_send_cmd_async(priv, cmd);
 815
 816         return iwl_send_cmd_sync(priv, cmd);
 817 }
 818
 819 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
 820 {
 821         struct iwl_host_cmd cmd = {
 822                 .id = id,
 823                 .len = len,
 824                 .data = data,
 825         };
 826
 827         return iwl_send_cmd_sync(priv, &cmd);
 828 }
 829
 830 static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
 831 {
 832         struct iwl_host_cmd cmd = {
 833                 .id = id,
 834                 .len = sizeof(val),
 835                 .data = &val,
 836         };
 837
 838         return iwl_send_cmd_sync(priv, &cmd);
 839 }
 840
 841 int iwl_send_statistics_request(struct iwl_priv *priv)
 842 {
 843         return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 844 }
 845
 846 /**
 847  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 848  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 849  * @channel: Any channel valid for the requested phymode
 850
 851  * In addition to setting the staging RXON, priv->phymode is also set.
 852  *
 853  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 854  * in the staging RXON flag structure based on the phymode
 855  */
 856 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
 857 {
 858         if (!iwl_get_channel_info(priv, phymode, channel)) {
 859                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 860                                channel, phymode);
 861                 return -EINVAL;
 862         }
 863
 864         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 865             (priv->phymode == phymode))
 866                 return 0;
 867
 868         priv->staging_rxon.channel = cpu_to_le16(channel);
 869         if (phymode == MODE_IEEE80211A)
 870                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 871         else
 872                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 873
 874         priv->phymode = phymode;
 875
 876         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
 877
 878         return 0;
 879 }
 880
 881 /**
 882  * iwl_check_rxon_cmd - validate RXON structure is valid
 883  *
 884  * NOTE:  This is really only useful during development and can eventually
 885  * be #ifdef'd out once the driver is stable and folks aren't actively
 886  * making changes
 887  */
 888 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
 889 {
 890         int error = 0;
 891         int counter = 1;
 892
 893         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 894                 error |= le32_to_cpu(rxon->flags &
 895                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 896                                  RXON_FLG_RADAR_DETECT_MSK));
 897                 if (error)
 898                         IWL_WARNING("check 24G fields %d | %d\n",
 899                                     counter++, error);
 900         } else {
 901                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 902                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 903                 if (error)
 904                         IWL_WARNING("check 52 fields %d | %d\n",
 905                                     counter++, error);
 906                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 907                 if (error)
 908                         IWL_WARNING("check 52 CCK %d | %d\n",
 909                                     counter++, error);
 910         }
 911         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 912         if (error)
 913                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 914
 915         /* make sure basic rates 6Mbps and 1Mbps are supported */
 916         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 917                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 918         if (error)
 919                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 920
 921         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 922         if (error)
 923                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 924
 925         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 926                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 927         if (error)
 928                 IWL_WARNING("check CCK and short slot %d | %d\n",
 929                             counter++, error);
 930
 931         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 932                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 933         if (error)
 934                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 935                             counter++, error);
 936
 937         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 938                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 939         if (error)
 940                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 941                             counter++, error);
 942
 943         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 944                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 945                                 RXON_FLG_ANT_A_MSK)) == 0);
 946         if (error)
 947                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 948
 949         if (error)
 950                 IWL_WARNING("Tuning to channel %d\n",
 951                             le16_to_cpu(rxon->channel));
 952
 953         if (error) {
 954                 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
 955                 return -1;
 956         }
 957         return 0;
 958 }
 959
 960 /**
 961  * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
 962  * @priv: staging_rxon is comapred to active_rxon
 963  *
 964  * If the RXON structure is changing sufficient to require a new
 965  * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
 966  * to indicate a new tune is required.
 967  */
 968 static int iwl_full_rxon_required(struct iwl_priv *priv)
 969 {
 970
 971         /* These items are only settable from the full RXON command */
 972         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 973             compare_ether_addr(priv->staging_rxon.bssid_addr,
 974                                priv->active_rxon.bssid_addr) ||
 975             compare_ether_addr(priv->staging_rxon.node_addr,
 976                                priv->active_rxon.node_addr) ||
 977             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 978                                priv->active_rxon.wlap_bssid_addr) ||
 979             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 980             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 981             (priv->staging_rxon.air_propagation !=
 982              priv->active_rxon.air_propagation) ||
 983             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 984                 return 1;
 985
 986         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 987          * be updated with the RXON_ASSOC command -- however only some
 988          * flag transitions are allowed using RXON_ASSOC */
 989
 990         /* Check if we are not switching bands */
 991         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 992             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 993                 return 1;
 994
 995         /* Check if we are switching association toggle */
 996         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 997                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 998                 return 1;
 999
1000         return 0;
1001 }
1002
1003 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1004 {
1005         int rc = 0;
1006         struct iwl_rx_packet *res = NULL;
1007         struct iwl_rxon_assoc_cmd rxon_assoc;
1008         struct iwl_host_cmd cmd = {
1009                 .id = REPLY_RXON_ASSOC,
1010                 .len = sizeof(rxon_assoc),
1011                 .meta.flags = CMD_WANT_SKB,
1012                 .data = &rxon_assoc,
1013         };
1014         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1015         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1016
1017         if ((rxon1->flags == rxon2->flags) &&
1018             (rxon1->filter_flags == rxon2->filter_flags) &&
1019             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1020             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1021                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1022                 return 0;
1023         }
1024
1025         rxon_assoc.flags = priv->staging_rxon.flags;
1026         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1027         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1028         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1029         rxon_assoc.reserved = 0;
1030
1031         rc = iwl_send_cmd_sync(priv, &cmd);
1032         if (rc)
1033                 return rc;
1034
1035         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1036         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1037                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1038                 rc = -EIO;
1039         }
1040
1041         priv->alloc_rxb_skb--;
1042         dev_kfree_skb_any(cmd.meta.u.skb);
1043
1044         return rc;
1045 }
1046
1047 /**
1048  * iwl_commit_rxon - commit staging_rxon to hardware
1049  *
1050  * The RXON command in staging_rxon is commited to the hardware and
1051  * the active_rxon structure is updated with the new data.  This
1052  * function correctly transitions out of the RXON_ASSOC_MSK state if
1053  * a HW tune is required based on the RXON structure changes.
1054  */
1055 static int iwl_commit_rxon(struct iwl_priv *priv)
1056 {
1057         /* cast away the const for active_rxon in this function */
1058         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1059         int rc = 0;
1060         DECLARE_MAC_BUF(mac);
1061
1062         if (!iwl_is_alive(priv))
1063                 return -1;
1064
1065         /* always get timestamp with Rx frame */
1066         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1067
1068         /* select antenna */
1069         priv->staging_rxon.flags &=
1070             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1071         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1072
1073         rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1074         if (rc) {
1075                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1076                 return -EINVAL;
1077         }
1078
1079         /* If we don't need to send a full RXON, we can use
1080          * iwl_rxon_assoc_cmd which is used to reconfigure filter
1081          * and other flags for the current radio configuration. */
1082         if (!iwl_full_rxon_required(priv)) {
1083                 rc = iwl_send_rxon_assoc(priv);
1084                 if (rc) {
1085                         IWL_ERROR("Error setting RXON_ASSOC "
1086                                   "configuration (%d).\n", rc);
1087                         return rc;
1088                 }
1089
1090                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1091
1092                 return 0;
1093         }
1094
1095         /* If we are currently associated and the new config requires
1096          * an RXON_ASSOC and the new config wants the associated mask enabled,
1097          * we must clear the associated from the active configuration
1098          * before we apply the new config */
1099         if (iwl_is_associated(priv) &&
1100             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1101                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1102                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1103
1104                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1105                                       sizeof(struct iwl_rxon_cmd),
1106                                       &priv->active_rxon);
1107
1108                 /* If the mask clearing failed then we set
1109                  * active_rxon back to what it was previously */
1110                 if (rc) {
1111                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1112                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1113                                   "configuration (%d).\n", rc);
1114                         return rc;
1115                 }
1116         }
1117
1118         IWL_DEBUG_INFO("Sending RXON\n"
1119                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1120                        "* channel = %d\n"
1121                        "* bssid = %s\n",
1122                        ((priv->staging_rxon.filter_flags &
1123                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1124                        le16_to_cpu(priv->staging_rxon.channel),
1125                        print_mac(mac, priv->staging_rxon.bssid_addr));
1126
1127         /* Apply the new configuration */
1128         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1129                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1130         if (rc) {
1131                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1132                 return rc;
1133         }
1134
1135         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1136
1137         iwl_clear_stations_table(priv);
1138
1139         /* If we issue a new RXON command which required a tune then we must
1140          * send a new TXPOWER command or we won't be able to Tx any frames */
1141         rc = iwl_hw_reg_send_txpower(priv);
1142         if (rc) {
1143                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1144                 return rc;
1145         }
1146
1147         /* Add the broadcast address so we can send broadcast frames */
1148         if (iwl_add_station(priv, BROADCAST_ADDR, 0, 0) ==
1149             IWL_INVALID_STATION) {
1150                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1151                 return -EIO;
1152         }
1153
1154         /* If we have set the ASSOC_MSK and we are in BSS mode then
1155          * add the IWL_AP_ID to the station rate table */
1156         if (iwl_is_associated(priv) &&
1157             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1158                 if (iwl_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1159                     == IWL_INVALID_STATION) {
1160                         IWL_ERROR("Error adding AP address for transmit.\n");
1161                         return -EIO;
1162                 }
1163
1164         /* Init the hardware's rate fallback order based on the
1165          * phymode */
1166         rc = iwl3945_init_hw_rate_table(priv);
1167         if (rc) {
1168                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1169                 return -EIO;
1170         }
1171
1172         return 0;
1173 }
1174
1175 static int iwl_send_bt_config(struct iwl_priv *priv)
1176 {
1177         struct iwl_bt_cmd bt_cmd = {
1178                 .flags = 3,
1179                 .lead_time = 0xAA,
1180                 .max_kill = 1,
1181                 .kill_ack_mask = 0,
1182                 .kill_cts_mask = 0,
1183         };
1184
1185         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1186                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1187 }
1188
1189 static int iwl_send_scan_abort(struct iwl_priv *priv)
1190 {
1191         int rc = 0;
1192         struct iwl_rx_packet *res;
1193         struct iwl_host_cmd cmd = {
1194                 .id = REPLY_SCAN_ABORT_CMD,
1195                 .meta.flags = CMD_WANT_SKB,
1196         };
1197
1198         /* If there isn't a scan actively going on in the hardware
1199          * then we are in between scan bands and not actually
1200          * actively scanning, so don't send the abort command */
1201         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1202                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1203                 return 0;
1204         }
1205
1206         rc = iwl_send_cmd_sync(priv, &cmd);
1207         if (rc) {
1208                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1209                 return rc;
1210         }
1211
1212         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1213         if (res->u.status != CAN_ABORT_STATUS) {
1214                 /* The scan abort will return 1 for success or
1215                  * 2 for "failure".  A failure condition can be
1216                  * due to simply not being in an active scan which
1217                  * can occur if we send the scan abort before we
1218                  * the microcode has notified us that a scan is
1219                  * completed. */
1220                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1221                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1222                 clear_bit(STATUS_SCAN_HW, &priv->status);
1223         }
1224
1225         dev_kfree_skb_any(cmd.meta.u.skb);
1226
1227         return rc;
1228 }
1229
1230 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1231                                         struct iwl_cmd *cmd,
1232                                         struct sk_buff *skb)
1233 {
1234         return 1;
1235 }
1236
1237 /*
1238  * CARD_STATE_CMD
1239  *
1240  * Use: Sets the internal card state to enable, disable, or halt
1241  *
1242  * When in the 'enable' state the card operates as normal.
1243  * When in the 'disable' state, the card enters into a low power mode.
1244  * When in the 'halt' state, the card is shut down and must be fully
1245  * restarted to come back on.
1246  */
1247 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1248 {
1249         struct iwl_host_cmd cmd = {
1250                 .id = REPLY_CARD_STATE_CMD,
1251                 .len = sizeof(u32),
1252                 .data = &flags,
1253                 .meta.flags = meta_flag,
1254         };
1255
1256         if (meta_flag & CMD_ASYNC)
1257                 cmd.meta.u.callback = iwl_card_state_sync_callback;
1258
1259         return iwl_send_cmd(priv, &cmd);
1260 }
1261
1262 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1263                                      struct iwl_cmd *cmd, struct sk_buff *skb)
1264 {
1265         struct iwl_rx_packet *res = NULL;
1266
1267         if (!skb) {
1268                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1269                 return 1;
1270         }
1271
1272         res = (struct iwl_rx_packet *)skb->data;
1273         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1274                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1275                           res->hdr.flags);
1276                 return 1;
1277         }
1278
1279         switch (res->u.add_sta.status) {
1280         case ADD_STA_SUCCESS_MSK:
1281                 break;
1282         default:
1283                 break;
1284         }
1285
1286         /* We didn't cache the SKB; let the caller free it */
1287         return 1;
1288 }
1289
1290 int iwl_send_add_station(struct iwl_priv *priv,
1291                          struct iwl_addsta_cmd *sta, u8 flags)
1292 {
1293         struct iwl_rx_packet *res = NULL;
1294         int rc = 0;
1295         struct iwl_host_cmd cmd = {
1296                 .id = REPLY_ADD_STA,
1297                 .len = sizeof(struct iwl_addsta_cmd),
1298                 .meta.flags = flags,
1299                 .data = sta,
1300         };
1301
1302         if (flags & CMD_ASYNC)
1303                 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1304         else
1305                 cmd.meta.flags |= CMD_WANT_SKB;
1306
1307         rc = iwl_send_cmd(priv, &cmd);
1308
1309         if (rc || (flags & CMD_ASYNC))
1310                 return rc;
1311
1312         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1313         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1314                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1315                           res->hdr.flags);
1316                 rc = -EIO;
1317         }
1318
1319         if (rc == 0) {
1320                 switch (res->u.add_sta.status) {
1321                 case ADD_STA_SUCCESS_MSK:
1322                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1323                         break;
1324                 default:
1325                         rc = -EIO;
1326                         IWL_WARNING("REPLY_ADD_STA failed\n");
1327                         break;
1328                 }
1329         }
1330
1331         priv->alloc_rxb_skb--;
1332         dev_kfree_skb_any(cmd.meta.u.skb);
1333
1334         return rc;
1335 }
1336
1337 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1338                                    struct ieee80211_key_conf *keyconf,
1339                                    u8 sta_id)
1340 {
1341         unsigned long flags;
1342         __le16 key_flags = 0;
1343
1344         switch (keyconf->alg) {
1345         case ALG_CCMP:
1346                 key_flags |= STA_KEY_FLG_CCMP;
1347                 key_flags |= cpu_to_le16(
1348                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1349                 key_flags &= ~STA_KEY_FLG_INVALID;
1350                 break;
1351         case ALG_TKIP:
1352         case ALG_WEP:
1353                 return -EINVAL;
1354         default:
1355                 return -EINVAL;
1356         }
1357         spin_lock_irqsave(&priv->sta_lock, flags);
1358         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1359         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1360         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1361                keyconf->keylen);
1362
1363         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1364                keyconf->keylen);
1365         priv->stations[sta_id].sta.key.key_flags = key_flags;
1366         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1367         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1368
1369         spin_unlock_irqrestore(&priv->sta_lock, flags);
1370
1371         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1372         iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1373         return 0;
1374 }
1375
1376 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1377 {
1378         unsigned long flags;
1379
1380         spin_lock_irqsave(&priv->sta_lock, flags);
1381         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1382         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1383         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1384         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1385         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1386         spin_unlock_irqrestore(&priv->sta_lock, flags);
1387
1388         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1389         iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1390         return 0;
1391 }
1392
1393 static void iwl_clear_free_frames(struct iwl_priv *priv)
1394 {
1395         struct list_head *element;
1396
1397         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1398                        priv->frames_count);
1399
1400         while (!list_empty(&priv->free_frames)) {
1401                 element = priv->free_frames.next;
1402                 list_del(element);
1403                 kfree(list_entry(element, struct iwl_frame, list));
1404                 priv->frames_count--;
1405         }
1406
1407         if (priv->frames_count) {
1408                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1409                             priv->frames_count);
1410                 priv->frames_count = 0;
1411         }
1412 }
1413
1414 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1415 {
1416         struct iwl_frame *frame;
1417         struct list_head *element;
1418         if (list_empty(&priv->free_frames)) {
1419                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1420                 if (!frame) {
1421                         IWL_ERROR("Could not allocate frame!\n");
1422                         return NULL;
1423                 }
1424
1425                 priv->frames_count++;
1426                 return frame;
1427         }
1428
1429         element = priv->free_frames.next;
1430         list_del(element);
1431         return list_entry(element, struct iwl_frame, list);
1432 }
1433
1434 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1435 {
1436         memset(frame, 0, sizeof(*frame));
1437         list_add(&frame->list, &priv->free_frames);
1438 }
1439
1440 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1441                                 struct ieee80211_hdr *hdr,
1442                                 const u8 *dest, int left)
1443 {
1444
1445         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1446             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1447              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1448                 return 0;
1449
1450         if (priv->ibss_beacon->len > left)
1451                 return 0;
1452
1453         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1454
1455         return priv->ibss_beacon->len;
1456 }
1457
1458 static int iwl_rate_index_from_plcp(int plcp)
1459 {
1460         int i = 0;
1461
1462         for (i = 0; i < IWL_RATE_COUNT; i++)
1463                 if (iwl_rates[i].plcp == plcp)
1464                         return i;
1465         return -1;
1466 }
1467
1468 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1469 {
1470         u8 i;
1471
1472         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1473              i = iwl_rates[i].next_ieee) {
1474                 if (rate_mask & (1 << i))
1475                         return iwl_rates[i].plcp;
1476         }
1477
1478         return IWL_RATE_INVALID;
1479 }
1480
1481 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1482 {
1483         struct iwl_frame *frame;
1484         unsigned int frame_size;
1485         int rc;
1486         u8 rate;
1487
1488         frame = iwl_get_free_frame(priv);
1489
1490         if (!frame) {
1491                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1492                           "command.\n");
1493                 return -ENOMEM;
1494         }
1495
1496         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1497                 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1498                                                 0xFF0);
1499                 if (rate == IWL_INVALID_RATE)
1500                         rate = IWL_RATE_6M_PLCP;
1501         } else {
1502                 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1503                 if (rate == IWL_INVALID_RATE)
1504                         rate = IWL_RATE_1M_PLCP;
1505         }
1506
1507         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1508
1509         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1510                               &frame->u.cmd[0]);
1511
1512         iwl_free_frame(priv, frame);
1513
1514         return rc;
1515 }
1516
1517 /******************************************************************************
1518  *
1519  * EEPROM related functions
1520  *
1521  ******************************************************************************/
1522
1523 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1524 {
1525         memcpy(mac, priv->eeprom.mac_address, 6);
1526 }
1527
1528 /**
1529  * iwl_eeprom_init - read EEPROM contents
1530  *
1531  * Load the EEPROM from adapter into priv->eeprom
1532  *
1533  * NOTE:  This routine uses the non-debug IO access functions.
1534  */
1535 int iwl_eeprom_init(struct iwl_priv *priv)
1536 {
1537         u16 *e = (u16 *)&priv->eeprom;
1538         u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1539         u32 r;
1540         int sz = sizeof(priv->eeprom);
1541         int rc;
1542         int i;
1543         u16 addr;
1544
1545         /* The EEPROM structure has several padding buffers within it
1546          * and when adding new EEPROM maps is subject to programmer errors
1547          * which may be very difficult to identify without explicitly
1548          * checking the resulting size of the eeprom map. */
1549         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1550
1551         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1552                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1553                 return -ENOENT;
1554         }
1555
1556         rc = iwl_eeprom_aqcuire_semaphore(priv);
1557         if (rc < 0) {
1558                 IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
1559                 return -ENOENT;
1560         }
1561
1562         /* eeprom is an array of 16bit values */
1563         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1564                 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1565                 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1566
1567                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1568                                         i += IWL_EEPROM_ACCESS_DELAY) {
1569                         r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1570                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1571                                 break;
1572                         udelay(IWL_EEPROM_ACCESS_DELAY);
1573                 }
1574
1575                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1576                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1577                         return -ETIMEDOUT;
1578                 }
1579                 e[addr / 2] = le16_to_cpu(r >> 16);
1580         }
1581
1582         return 0;
1583 }
1584
1585 /******************************************************************************
1586  *
1587  * Misc. internal state and helper functions
1588  *
1589  ******************************************************************************/
1590 #ifdef CONFIG_IWLWIFI_DEBUG
1591
1592 /**
1593  * iwl_report_frame - dump frame to syslog during debug sessions
1594  *
1595  * hack this function to show different aspects of received frames,
1596  * including selective frame dumps.
1597  * group100 parameter selects whether to show 1 out of 100 good frames.
1598  *
1599  * TODO:  ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1600  *        info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1601  *        is 3945-specific and gives bad output for 4965.  Need to split the
1602  *        functionality, keep common stuff here.
1603  */
1604 void iwl_report_frame(struct iwl_priv *priv,
1605                       struct iwl_rx_packet *pkt,
1606                       struct ieee80211_hdr *header, int group100)
1607 {
1608         u32 to_us;
1609         u32 print_summary = 0;
1610         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1611         u32 hundred = 0;
1612         u32 dataframe = 0;
1613         u16 fc;
1614         u16 seq_ctl;
1615         u16 channel;
1616         u16 phy_flags;
1617         int rate_sym;
1618         u16 length;
1619         u16 status;
1620         u16 bcn_tmr;
1621         u32 tsf_low;
1622         u64 tsf;
1623         u8 rssi;
1624         u8 agc;
1625         u16 sig_avg;
1626         u16 noise_diff;
1627         struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1628         struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1629         struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1630         u8 *data = IWL_RX_DATA(pkt);
1631
1632         /* MAC header */
1633         fc = le16_to_cpu(header->frame_control);
1634         seq_ctl = le16_to_cpu(header->seq_ctrl);
1635
1636         /* metadata */
1637         channel = le16_to_cpu(rx_hdr->channel);
1638         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1639         rate_sym = rx_hdr->rate;
1640         length = le16_to_cpu(rx_hdr->len);
1641
1642         /* end-of-frame status and timestamp */
1643         status = le32_to_cpu(rx_end->status);
1644         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1645         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1646         tsf = le64_to_cpu(rx_end->timestamp);
1647
1648         /* signal statistics */
1649         rssi = rx_stats->rssi;
1650         agc = rx_stats->agc;
1651         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1652         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1653
1654         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1655
1656         /* if data frame is to us and all is good,
1657          *   (optionally) print summary for only 1 out of every 100 */
1658         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1659             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1660                 dataframe = 1;
1661                 if (!group100)
1662                         print_summary = 1;      /* print each frame */
1663                 else if (priv->framecnt_to_us < 100) {
1664                         priv->framecnt_to_us++;
1665                         print_summary = 0;
1666                 } else {
1667                         priv->framecnt_to_us = 0;
1668                         print_summary = 1;
1669                         hundred = 1;
1670                 }
1671         } else {
1672                 /* print summary for all other frames */
1673                 print_summary = 1;
1674         }
1675
1676         if (print_summary) {
1677                 char *title;
1678                 u32 rate;
1679
1680                 if (hundred)
1681                         title = "100Frames";
1682                 else if (fc & IEEE80211_FCTL_RETRY)
1683                         title = "Retry";
1684                 else if (ieee80211_is_assoc_response(fc))
1685                         title = "AscRsp";
1686                 else if (ieee80211_is_reassoc_response(fc))
1687                         title = "RasRsp";
1688                 else if (ieee80211_is_probe_response(fc)) {
1689                         title = "PrbRsp";
1690                         print_dump = 1; /* dump frame contents */
1691                 } else if (ieee80211_is_beacon(fc)) {
1692                         title = "Beacon";
1693                         print_dump = 1; /* dump frame contents */
1694                 } else if (ieee80211_is_atim(fc))
1695                         title = "ATIM";
1696                 else if (ieee80211_is_auth(fc))
1697                         title = "Auth";
1698                 else if (ieee80211_is_deauth(fc))
1699                         title = "DeAuth";
1700                 else if (ieee80211_is_disassoc(fc))
1701                         title = "DisAssoc";
1702                 else
1703                         title = "Frame";
1704
1705                 rate = iwl_rate_index_from_plcp(rate_sym);
1706                 if (rate == -1)
1707                         rate = 0;
1708                 else
1709                         rate = iwl_rates[rate].ieee / 2;
1710
1711                 /* print frame summary.
1712                  * MAC addresses show just the last byte (for brevity),
1713                  *    but you can hack it to show more, if you'd like to. */
1714                 if (dataframe)
1715                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1716                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1717                                      title, fc, header->addr1[5],
1718                                      length, rssi, channel, rate);
1719                 else {
1720                         /* src/dst addresses assume managed mode */
1721                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1722                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1723                                      "phy=0x%02x, chnl=%d\n",
1724                                      title, fc, header->addr1[5],
1725                                      header->addr3[5], rssi,
1726                                      tsf_low - priv->scan_start_tsf,
1727                                      phy_flags, channel);
1728                 }
1729         }
1730         if (print_dump)
1731                 iwl_print_hex_dump(IWL_DL_RX, data, length);
1732 }
1733 #endif
1734
1735 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1736 {
1737         if (priv->hw_setting.shared_virt)
1738                 pci_free_consistent(priv->pci_dev,
1739                                     sizeof(struct iwl_shared),
1740                                     priv->hw_setting.shared_virt,
1741                                     priv->hw_setting.shared_phys);
1742 }
1743
1744 /**
1745  * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1746  *
1747  * return : set the bit for each supported rate insert in ie
1748  */
1749 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1750                                     u16 basic_rate, int *left)
1751 {
1752         u16 ret_rates = 0, bit;
1753         int i;
1754         u8 *cnt = ie;
1755         u8 *rates = ie + 1;
1756
1757         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1758                 if (bit & supported_rate) {
1759                         ret_rates |= bit;
1760                         rates[*cnt] = iwl_rates[i].ieee |
1761                                 ((bit & basic_rate) ? 0x80 : 0x00);
1762                         (*cnt)++;
1763                         (*left)--;
1764                         if ((*left <= 0) ||
1765                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1766                                 break;
1767                 }
1768         }
1769
1770         return ret_rates;
1771 }
1772
1773 /**
1774  * iwl_fill_probe_req - fill in all required fields and IE for probe request
1775  */
1776 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1777                               struct ieee80211_mgmt *frame,
1778                               int left, int is_direct)
1779 {
1780         int len = 0;
1781         u8 *pos = NULL;
1782         u16 active_rates, ret_rates, cck_rates;
1783
1784         /* Make sure there is enough space for the probe request,
1785          * two mandatory IEs and the data */
1786         left -= 24;
1787         if (left < 0)
1788                 return 0;
1789         len += 24;
1790
1791         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1792         memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1793         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1794         memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1795         frame->seq_ctrl = 0;
1796
1797         /* fill in our indirect SSID IE */
1798         /* ...next IE... */
1799
1800         left -= 2;
1801         if (left < 0)
1802                 return 0;
1803         len += 2;
1804         pos = &(frame->u.probe_req.variable[0]);
1805         *pos++ = WLAN_EID_SSID;
1806         *pos++ = 0;
1807
1808         /* fill in our direct SSID IE... */
1809         if (is_direct) {
1810                 /* ...next IE... */
1811                 left -= 2 + priv->essid_len;
1812                 if (left < 0)
1813                         return 0;
1814                 /* ... fill it in... */
1815                 *pos++ = WLAN_EID_SSID;
1816                 *pos++ = priv->essid_len;
1817                 memcpy(pos, priv->essid, priv->essid_len);
1818                 pos += priv->essid_len;
1819                 len += 2 + priv->essid_len;
1820         }
1821
1822         /* fill in supported rate */
1823         /* ...next IE... */
1824         left -= 2;
1825         if (left < 0)
1826                 return 0;
1827
1828         /* ... fill it in... */
1829         *pos++ = WLAN_EID_SUPP_RATES;
1830         *pos = 0;
1831
1832         priv->active_rate = priv->rates_mask;
1833         active_rates = priv->active_rate;
1834         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1835
1836         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1837         ret_rates = iwl_supported_rate_to_ie(pos, cck_rates,
1838                         priv->active_rate_basic, &left);
1839         active_rates &= ~ret_rates;
1840
1841         ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
1842                                  priv->active_rate_basic, &left);
1843         active_rates &= ~ret_rates;
1844
1845         len += 2 + *pos;
1846         pos += (*pos) + 1;
1847         if (active_rates == 0)
1848                 goto fill_end;
1849
1850         /* fill in supported extended rate */
1851         /* ...next IE... */
1852         left -= 2;
1853         if (left < 0)
1854                 return 0;
1855         /* ... fill it in... */
1856         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1857         *pos = 0;
1858         iwl_supported_rate_to_ie(pos, active_rates,
1859                                  priv->active_rate_basic, &left);
1860         if (*pos > 0)
1861                 len += 2 + *pos;
1862
1863  fill_end:
1864         return (u16)len;
1865 }
1866
1867 /*
1868  * QoS  support
1869 */
1870 #ifdef CONFIG_IWLWIFI_QOS
1871 static int iwl_send_qos_params_command(struct iwl_priv *priv,
1872                                        struct iwl_qosparam_cmd *qos)
1873 {
1874
1875         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1876                                 sizeof(struct iwl_qosparam_cmd), qos);
1877 }
1878
1879 static void iwl_reset_qos(struct iwl_priv *priv)
1880 {
1881         u16 cw_min = 15;
1882         u16 cw_max = 1023;
1883         u8 aifs = 2;
1884         u8 is_legacy = 0;
1885         unsigned long flags;
1886         int i;
1887
1888         spin_lock_irqsave(&priv->lock, flags);
1889         priv->qos_data.qos_active = 0;
1890
1891         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1892                 if (priv->qos_data.qos_enable)
1893                         priv->qos_data.qos_active = 1;
1894                 if (!(priv->active_rate & 0xfff0)) {
1895                         cw_min = 31;
1896                         is_legacy = 1;
1897                 }
1898         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1899                 if (priv->qos_data.qos_enable)
1900                         priv->qos_data.qos_active = 1;
1901         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1902                 cw_min = 31;
1903                 is_legacy = 1;
1904         }
1905
1906         if (priv->qos_data.qos_active)
1907                 aifs = 3;
1908
1909         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1910         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1911         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1912         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1913         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1914
1915         if (priv->qos_data.qos_active) {
1916                 i = 1;
1917                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1918                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1919                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1920                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1921                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1922
1923                 i = 2;
1924                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1925                         cpu_to_le16((cw_min + 1) / 2 - 1);
1926                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1927                         cpu_to_le16(cw_max);
1928                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1929                 if (is_legacy)
1930                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1931                                 cpu_to_le16(6016);
1932                 else
1933                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1934                                 cpu_to_le16(3008);
1935                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1936
1937                 i = 3;
1938                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1939                         cpu_to_le16((cw_min + 1) / 4 - 1);
1940                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1941                         cpu_to_le16((cw_max + 1) / 2 - 1);
1942                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1943                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1944                 if (is_legacy)
1945                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1946                                 cpu_to_le16(3264);
1947                 else
1948                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1949                                 cpu_to_le16(1504);
1950         } else {
1951                 for (i = 1; i < 4; i++) {
1952                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1953                                 cpu_to_le16(cw_min);
1954                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1955                                 cpu_to_le16(cw_max);
1956                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1957                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1958                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1959                 }
1960         }
1961         IWL_DEBUG_QOS("set QoS to default \n");
1962
1963         spin_unlock_irqrestore(&priv->lock, flags);
1964 }
1965
1966 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
1967 {
1968         unsigned long flags;
1969
1970         if (priv == NULL)
1971                 return;
1972
1973         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1974                 return;
1975
1976         if (!priv->qos_data.qos_enable)
1977                 return;
1978
1979         spin_lock_irqsave(&priv->lock, flags);
1980         priv->qos_data.def_qos_parm.qos_flags = 0;
1981
1982         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1983             !priv->qos_data.qos_cap.q_AP.txop_request)
1984                 priv->qos_data.def_qos_parm.qos_flags |=
1985                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1986
1987         if (priv->qos_data.qos_active)
1988                 priv->qos_data.def_qos_parm.qos_flags |=
1989                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1990
1991         spin_unlock_irqrestore(&priv->lock, flags);
1992
1993         if (force || iwl_is_associated(priv)) {
1994                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
1995                               priv->qos_data.qos_active);
1996
1997                 iwl_send_qos_params_command(priv,
1998                                 &(priv->qos_data.def_qos_parm));
1999         }
2000 }
2001
2002 #endif /* CONFIG_IWLWIFI_QOS */
2003 /*
2004  * Power management (not Tx power!) functions
2005  */
2006 #define MSEC_TO_USEC 1024
2007
2008 #define NOSLP __constant_cpu_to_le32(0)
2009 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
2010 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2011 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2012                                      __constant_cpu_to_le32(X1), \
2013                                      __constant_cpu_to_le32(X2), \
2014                                      __constant_cpu_to_le32(X3), \
2015                                      __constant_cpu_to_le32(X4)}
2016
2017
2018 /* default power management (not Tx power) table values */
2019 /* for tim  0-10 */
2020 static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2021         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2022         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2023         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2024         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2025         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2026         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2027 };
2028
2029 /* for tim > 10 */
2030 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2031         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2032         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2033                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2034         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2035                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2036         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2037                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2038         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2039         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2040                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2041 };
2042
2043 int iwl_power_init_handle(struct iwl_priv *priv)
2044 {
2045         int rc = 0, i;
2046         struct iwl_power_mgr *pow_data;
2047         int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2048         u16 pci_pm;
2049
2050         IWL_DEBUG_POWER("Initialize power \n");
2051
2052         pow_data = &(priv->power_data);
2053
2054         memset(pow_data, 0, sizeof(*pow_data));
2055
2056         pow_data->active_index = IWL_POWER_RANGE_0;
2057         pow_data->dtim_val = 0xffff;
2058
2059         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2060         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2061
2062         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2063         if (rc != 0)
2064                 return 0;
2065         else {
2066                 struct iwl_powertable_cmd *cmd;
2067
2068                 IWL_DEBUG_POWER("adjust power command flags\n");
2069
2070                 for (i = 0; i < IWL_POWER_AC; i++) {
2071                         cmd = &pow_data->pwr_range_0[i].cmd;
2072
2073                         if (pci_pm & 0x1)
2074                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2075                         else
2076                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2077                 }
2078         }
2079         return rc;
2080 }
2081
2082 static int iwl_update_power_cmd(struct iwl_priv *priv,
2083                                 struct iwl_powertable_cmd *cmd, u32 mode)
2084 {
2085         int rc = 0, i;
2086         u8 skip;
2087         u32 max_sleep = 0;
2088         struct iwl_power_vec_entry *range;
2089         u8 period = 0;
2090         struct iwl_power_mgr *pow_data;
2091
2092         if (mode > IWL_POWER_INDEX_5) {
2093                 IWL_DEBUG_POWER("Error invalid power mode \n");
2094                 return -1;
2095         }
2096         pow_data = &(priv->power_data);
2097
2098         if (pow_data->active_index == IWL_POWER_RANGE_0)
2099                 range = &pow_data->pwr_range_0[0];
2100         else
2101                 range = &pow_data->pwr_range_1[1];
2102
2103         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2104
2105 #ifdef IWL_MAC80211_DISABLE
2106         if (priv->assoc_network != NULL) {
2107                 unsigned long flags;
2108
2109                 period = priv->assoc_network->tim.tim_period;
2110         }
2111 #endif  /*IWL_MAC80211_DISABLE */
2112         skip = range[mode].no_dtim;
2113
2114         if (period == 0) {
2115                 period = 1;
2116                 skip = 0;
2117         }
2118
2119         if (skip == 0) {
2120                 max_sleep = period;
2121                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2122         } else {
2123                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2124                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2125                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2126         }
2127
2128         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2129                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2130                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2131         }
2132
2133         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2134         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2135         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2136         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2137                         le32_to_cpu(cmd->sleep_interval[0]),
2138                         le32_to_cpu(cmd->sleep_interval[1]),
2139                         le32_to_cpu(cmd->sleep_interval[2]),
2140                         le32_to_cpu(cmd->sleep_interval[3]),
2141                         le32_to_cpu(cmd->sleep_interval[4]));
2142
2143         return rc;
2144 }
2145
2146 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2147 {
2148         u32 final_mode = mode;
2149         int rc;
2150         struct iwl_powertable_cmd cmd;
2151
2152         /* If on battery, set to 3,
2153          * if plugged into AC power, set to CAM ("continuosly aware mode"),
2154          * else user level */
2155         switch (mode) {
2156         case IWL_POWER_BATTERY:
2157                 final_mode = IWL_POWER_INDEX_3;
2158                 break;
2159         case IWL_POWER_AC:
2160                 final_mode = IWL_POWER_MODE_CAM;
2161                 break;
2162         default:
2163                 final_mode = mode;
2164                 break;
2165         }
2166
2167         iwl_update_power_cmd(priv, &cmd, final_mode);
2168
2169         rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2170
2171         if (final_mode == IWL_POWER_MODE_CAM)
2172                 clear_bit(STATUS_POWER_PMI, &priv->status);
2173         else
2174                 set_bit(STATUS_POWER_PMI, &priv->status);
2175
2176         return rc;
2177 }
2178
2179 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2180 {
2181         /* Filter incoming packets to determine if they are targeted toward
2182          * this network, discarding packets coming from ourselves */
2183         switch (priv->iw_mode) {
2184         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2185                 /* packets from our adapter are dropped (echo) */
2186                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2187                         return 0;
2188                 /* {broad,multi}cast packets to our IBSS go through */
2189                 if (is_multicast_ether_addr(header->addr1))
2190                         return !compare_ether_addr(header->addr3, priv->bssid);
2191                 /* packets to our adapter go through */
2192                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2193         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2194                 /* packets from our adapter are dropped (echo) */
2195                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2196                         return 0;
2197                 /* {broad,multi}cast packets to our BSS go through */
2198                 if (is_multicast_ether_addr(header->addr1))
2199                         return !compare_ether_addr(header->addr2, priv->bssid);
2200                 /* packets to our adapter go through */
2201                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2202         }
2203
2204         return 1;
2205 }
2206
2207 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2208
2209 const char *iwl_get_tx_fail_reason(u32 status)
2210 {
2211         switch (status & TX_STATUS_MSK) {
2212         case TX_STATUS_SUCCESS:
2213                 return "SUCCESS";
2214                 TX_STATUS_ENTRY(SHORT_LIMIT);
2215                 TX_STATUS_ENTRY(LONG_LIMIT);
2216                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2217                 TX_STATUS_ENTRY(MGMNT_ABORT);
2218                 TX_STATUS_ENTRY(NEXT_FRAG);
2219                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2220                 TX_STATUS_ENTRY(DEST_PS);
2221                 TX_STATUS_ENTRY(ABORTED);
2222                 TX_STATUS_ENTRY(BT_RETRY);
2223                 TX_STATUS_ENTRY(STA_INVALID);
2224                 TX_STATUS_ENTRY(FRAG_DROPPED);
2225                 TX_STATUS_ENTRY(TID_DISABLE);
2226                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2227                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2228                 TX_STATUS_ENTRY(TX_LOCKED);
2229                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2230         }
2231
2232         return "UNKNOWN";
2233 }
2234
2235 /**
2236  * iwl_scan_cancel - Cancel any currently executing HW scan
2237  *
2238  * NOTE: priv->mutex is not required before calling this function
2239  */
2240 static int iwl_scan_cancel(struct iwl_priv *priv)
2241 {
2242         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2243                 clear_bit(STATUS_SCANNING, &priv->status);
2244                 return 0;
2245         }
2246
2247         if (test_bit(STATUS_SCANNING, &priv->status)) {
2248                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2249                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2250                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2251                         queue_work(priv->workqueue, &priv->abort_scan);
2252
2253                 } else
2254                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2255
2256                 return test_bit(STATUS_SCANNING, &priv->status);
2257         }
2258
2259         return 0;
2260 }
2261
2262 /**
2263  * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2264  * @ms: amount of time to wait (in milliseconds) for scan to abort
2265  *
2266  * NOTE: priv->mutex must be held before calling this function
2267  */
2268 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2269 {
2270         unsigned long now = jiffies;
2271         int ret;
2272
2273         ret = iwl_scan_cancel(priv);
2274         if (ret && ms) {
2275                 mutex_unlock(&priv->mutex);
2276                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2277                                 test_bit(STATUS_SCANNING, &priv->status))
2278                         msleep(1);
2279                 mutex_lock(&priv->mutex);
2280
2281                 return test_bit(STATUS_SCANNING, &priv->status);
2282         }
2283
2284         return ret;
2285 }
2286
2287 static void iwl_sequence_reset(struct iwl_priv *priv)
2288 {
2289         /* Reset ieee stats */
2290
2291         /* We don't reset the net_device_stats (ieee->stats) on
2292          * re-association */
2293
2294         priv->last_seq_num = -1;
2295         priv->last_frag_num = -1;
2296         priv->last_packet_time = 0;
2297
2298         iwl_scan_cancel(priv);
2299 }
2300
2301 #define MAX_UCODE_BEACON_INTERVAL       1024
2302 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2303
2304 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2305 {
2306         u16 new_val = 0;
2307         u16 beacon_factor = 0;
2308
2309         beacon_factor =
2310             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2311                 / MAX_UCODE_BEACON_INTERVAL;
2312         new_val = beacon_val / beacon_factor;
2313
2314         return cpu_to_le16(new_val);
2315 }
2316
2317 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2318 {
2319         u64 interval_tm_unit;
2320         u64 tsf, result;
2321         unsigned long flags;
2322         struct ieee80211_conf *conf = NULL;
2323         u16 beacon_int = 0;
2324
2325         conf = ieee80211_get_hw_conf(priv->hw);
2326
2327         spin_lock_irqsave(&priv->lock, flags);
2328         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2329         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2330
2331         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2332
2333         tsf = priv->timestamp1;
2334         tsf = ((tsf << 32) | priv->timestamp0);
2335
2336         beacon_int = priv->beacon_int;
2337         spin_unlock_irqrestore(&priv->lock, flags);
2338
2339         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2340                 if (beacon_int == 0) {
2341                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2342                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2343                 } else {
2344                         priv->rxon_timing.beacon_interval =
2345                                 cpu_to_le16(beacon_int);
2346                         priv->rxon_timing.beacon_interval =
2347                             iwl_adjust_beacon_interval(
2348                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2349                 }
2350
2351                 priv->rxon_timing.atim_window = 0;
2352         } else {
2353                 priv->rxon_timing.beacon_interval =
2354                         iwl_adjust_beacon_interval(conf->beacon_int);
2355                 /* TODO: we need to get atim_window from upper stack
2356                  * for now we set to 0 */
2357                 priv->rxon_timing.atim_window = 0;
2358         }
2359
2360         interval_tm_unit =
2361                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2362         result = do_div(tsf, interval_tm_unit);
2363         priv->rxon_timing.beacon_init_val =
2364             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2365
2366         IWL_DEBUG_ASSOC
2367             ("beacon interval %d beacon timer %d beacon tim %d\n",
2368                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2369                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2370                 le16_to_cpu(priv->rxon_timing.atim_window));
2371 }
2372
2373 static int iwl_scan_initiate(struct iwl_priv *priv)
2374 {
2375         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2376                 IWL_ERROR("APs don't scan.\n");
2377                 return 0;
2378         }
2379
2380         if (!iwl_is_ready_rf(priv)) {
2381                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2382                 return -EIO;
2383         }
2384
2385         if (test_bit(STATUS_SCANNING, &priv->status)) {
2386                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2387                 return -EAGAIN;
2388         }
2389
2390         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2391                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2392                                "Queuing.\n");
2393                 return -EAGAIN;
2394         }
2395
2396         IWL_DEBUG_INFO("Starting scan...\n");
2397         priv->scan_bands = 2;
2398         set_bit(STATUS_SCANNING, &priv->status);
2399         priv->scan_start = jiffies;
2400         priv->scan_pass_start = priv->scan_start;
2401
2402         queue_work(priv->workqueue, &priv->request_scan);
2403
2404         return 0;
2405 }
2406
2407 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2408 {
2409         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2410
2411         if (hw_decrypt)
2412                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2413         else
2414                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2415
2416         return 0;
2417 }
2418
2419 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2420 {
2421         if (phymode == MODE_IEEE80211A) {
2422                 priv->staging_rxon.flags &=
2423                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2424                       | RXON_FLG_CCK_MSK);
2425                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2426         } else {
2427                 /* Copied from iwl_bg_post_associate() */
2428                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2429                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2430                 else
2431                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2432
2433                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2434                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2435
2436                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2437                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2438                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2439         }
2440 }
2441
2442 /*
2443  * initilize rxon structure with default values fromm eeprom
2444  */
2445 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2446 {
2447         const struct iwl_channel_info *ch_info;
2448
2449         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2450
2451         switch (priv->iw_mode) {
2452         case IEEE80211_IF_TYPE_AP:
2453                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2454                 break;
2455
2456         case IEEE80211_IF_TYPE_STA:
2457                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2458                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2459                 break;
2460
2461         case IEEE80211_IF_TYPE_IBSS:
2462                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2463                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2464                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2465                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2466                 break;
2467
2468         case IEEE80211_IF_TYPE_MNTR:
2469                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2470                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2471                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2472                 break;
2473         }
2474
2475 #if 0
2476         /* TODO:  Figure out when short_preamble would be set and cache from
2477          * that */
2478         if (!hw_to_local(priv->hw)->short_preamble)
2479                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2480         else
2481                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2482 #endif
2483
2484         ch_info = iwl_get_channel_info(priv, priv->phymode,
2485                                        le16_to_cpu(priv->staging_rxon.channel));
2486
2487         if (!ch_info)
2488                 ch_info = &priv->channel_info[0];
2489
2490         /*
2491          * in some case A channels are all non IBSS
2492          * in this case force B/G channel
2493          */
2494         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2495             !(is_channel_ibss(ch_info)))
2496                 ch_info = &priv->channel_info[0];
2497
2498         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2499         if (is_channel_a_band(ch_info))
2500                 priv->phymode = MODE_IEEE80211A;
2501         else
2502                 priv->phymode = MODE_IEEE80211G;
2503
2504         iwl_set_flags_for_phymode(priv, priv->phymode);
2505
2506         priv->staging_rxon.ofdm_basic_rates =
2507             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2508         priv->staging_rxon.cck_basic_rates =
2509             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2510 }
2511
2512 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2513 {
2514         if (!iwl_is_ready_rf(priv))
2515                 return -EAGAIN;
2516
2517         if (mode == IEEE80211_IF_TYPE_IBSS) {
2518                 const struct iwl_channel_info *ch_info;
2519
2520                 ch_info = iwl_get_channel_info(priv,
2521                         priv->phymode,
2522                         le16_to_cpu(priv->staging_rxon.channel));
2523
2524                 if (!ch_info || !is_channel_ibss(ch_info)) {
2525                         IWL_ERROR("channel %d not IBSS channel\n",
2526                                   le16_to_cpu(priv->staging_rxon.channel));
2527                         return -EINVAL;
2528                 }
2529         }
2530
2531         cancel_delayed_work(&priv->scan_check);
2532         if (iwl_scan_cancel_timeout(priv, 100)) {
2533                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2534                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2535                 return -EAGAIN;
2536         }
2537
2538         priv->iw_mode = mode;
2539
2540         iwl_connection_init_rx_config(priv);
2541         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2542
2543         iwl_clear_stations_table(priv);
2544
2545         iwl_commit_rxon(priv);
2546
2547         return 0;
2548 }
2549
2550 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2551                                       struct ieee80211_tx_control *ctl,
2552                                       struct iwl_cmd *cmd,
2553                                       struct sk_buff *skb_frag,
2554                                       int last_frag)
2555 {
2556         struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2557
2558         switch (keyinfo->alg) {
2559         case ALG_CCMP:
2560                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2561                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2562                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2563                 break;
2564
2565         case ALG_TKIP:
2566 #if 0
2567                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2568
2569                 if (last_frag)
2570                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2571                                8);
2572                 else
2573                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2574 #endif
2575                 break;
2576
2577         case ALG_WEP:
2578                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2579                     (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2580
2581                 if (keyinfo->keylen == 13)
2582                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2583
2584                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2585
2586                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2587                              "with key %d\n", ctl->key_idx);
2588                 break;
2589
2590         default:
2591                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2592                 break;
2593         }
2594 }
2595
2596 /*
2597  * handle build REPLY_TX command notification.
2598  */
2599 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2600                                   struct iwl_cmd *cmd,
2601                                   struct ieee80211_tx_control *ctrl,
2602                                   struct ieee80211_hdr *hdr,
2603                                   int is_unicast, u8 std_id)
2604 {
2605         __le16 *qc;
2606         u16 fc = le16_to_cpu(hdr->frame_control);
2607         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2608
2609         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2610         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2611                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2612                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2613                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2614                 if (ieee80211_is_probe_response(fc) &&
2615                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2616                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2617         } else {
2618                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2619                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2620         }
2621
2622         cmd->cmd.tx.sta_id = std_id;
2623         if (ieee80211_get_morefrag(hdr))
2624                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2625
2626         qc = ieee80211_get_qos_ctrl(hdr);
2627         if (qc) {
2628                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2629                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2630         } else
2631                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2632
2633         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2634                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2635                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2636         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2637                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2638                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2639         }
2640
2641         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2642                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2643
2644         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2645         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2646                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2647                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2648                         cmd->cmd.tx.timeout.pm_frame_timeout =
2649                                 cpu_to_le16(3);
2650                 else
2651                         cmd->cmd.tx.timeout.pm_frame_timeout =
2652                                 cpu_to_le16(2);
2653         } else
2654                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2655
2656         cmd->cmd.tx.driver_txop = 0;
2657         cmd->cmd.tx.tx_flags = tx_flags;
2658         cmd->cmd.tx.next_frame_len = 0;
2659 }
2660
2661 static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2662 {
2663         int sta_id;
2664         u16 fc = le16_to_cpu(hdr->frame_control);
2665
2666         /* If this frame is broadcast or not data then use the broadcast
2667          * station id */
2668         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2669             is_multicast_ether_addr(hdr->addr1))
2670                 return priv->hw_setting.bcast_sta_id;
2671
2672         switch (priv->iw_mode) {
2673
2674         /* If this frame is part of a BSS network (we're a station), then
2675          * we use the AP's station id */
2676         case IEEE80211_IF_TYPE_STA:
2677                 return IWL_AP_ID;
2678
2679         /* If we are an AP, then find the station, or use BCAST */
2680         case IEEE80211_IF_TYPE_AP:
2681                 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2682                 if (sta_id != IWL_INVALID_STATION)
2683                         return sta_id;
2684                 return priv->hw_setting.bcast_sta_id;
2685
2686         /* If this frame is part of a IBSS network, then we use the
2687          * target specific station id */
2688         case IEEE80211_IF_TYPE_IBSS: {
2689                 DECLARE_MAC_BUF(mac);
2690
2691                 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2692                 if (sta_id != IWL_INVALID_STATION)
2693                         return sta_id;
2694
2695                 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2696
2697                 if (sta_id != IWL_INVALID_STATION)
2698                         return sta_id;
2699
2700                 IWL_DEBUG_DROP("Station %s not in station map. "
2701                                "Defaulting to broadcast...\n",
2702                                print_mac(mac, hdr->addr1));
2703                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2704                 return priv->hw_setting.bcast_sta_id;
2705         }
2706         default:
2707                 IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
2708                 return priv->hw_setting.bcast_sta_id;
2709         }
2710 }
2711
2712 /*
2713  * start REPLY_TX command process
2714  */
2715 static int iwl_tx_skb(struct iwl_priv *priv,
2716                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2717 {
2718         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2719         struct iwl_tfd_frame *tfd;
2720         u32 *control_flags;
2721         int txq_id = ctl->queue;
2722         struct iwl_tx_queue *txq = NULL;
2723         struct iwl_queue *q = NULL;
2724         dma_addr_t phys_addr;
2725         dma_addr_t txcmd_phys;
2726         struct iwl_cmd *out_cmd = NULL;
2727         u16 len, idx, len_org;
2728         u8 id, hdr_len, unicast;
2729         u8 sta_id;
2730         u16 seq_number = 0;
2731         u16 fc;
2732         __le16 *qc;
2733         u8 wait_write_ptr = 0;
2734         unsigned long flags;
2735         int rc;
2736
2737         spin_lock_irqsave(&priv->lock, flags);
2738         if (iwl_is_rfkill(priv)) {
2739                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2740                 goto drop_unlock;
2741         }
2742
2743         if (!priv->interface_id) {
2744                 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2745                 goto drop_unlock;
2746         }
2747
2748         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2749                 IWL_ERROR("ERROR: No TX rate available.\n");
2750                 goto drop_unlock;
2751         }
2752
2753         unicast = !is_multicast_ether_addr(hdr->addr1);
2754         id = 0;
2755
2756         fc = le16_to_cpu(hdr->frame_control);
2757
2758 #ifdef CONFIG_IWLWIFI_DEBUG
2759         if (ieee80211_is_auth(fc))
2760                 IWL_DEBUG_TX("Sending AUTH frame\n");
2761         else if (ieee80211_is_assoc_request(fc))
2762                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2763         else if (ieee80211_is_reassoc_request(fc))
2764                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2765 #endif
2766
2767         if (!iwl_is_associated(priv) &&
2768             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2769                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2770                 goto drop_unlock;
2771         }
2772
2773         spin_unlock_irqrestore(&priv->lock, flags);
2774
2775         hdr_len = ieee80211_get_hdrlen(fc);
2776         sta_id = iwl_get_sta_id(priv, hdr);
2777         if (sta_id == IWL_INVALID_STATION) {
2778                 DECLARE_MAC_BUF(mac);
2779
2780                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2781                                print_mac(mac, hdr->addr1));
2782                 goto drop;
2783         }
2784
2785         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2786
2787         qc = ieee80211_get_qos_ctrl(hdr);
2788         if (qc) {
2789                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2790                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2791                                 IEEE80211_SCTL_SEQ;
2792                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2793                         (hdr->seq_ctrl &
2794                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2795                 seq_number += 0x10;
2796         }
2797         txq = &priv->txq[txq_id];
2798         q = &txq->q;
2799
2800         spin_lock_irqsave(&priv->lock, flags);
2801
2802         tfd = &txq->bd[q->first_empty];
2803         memset(tfd, 0, sizeof(*tfd));
2804         control_flags = (u32 *) tfd;
2805         idx = get_cmd_index(q, q->first_empty, 0);
2806
2807         memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
2808         txq->txb[q->first_empty].skb[0] = skb;
2809         memcpy(&(txq->txb[q->first_empty].status.control),
2810                ctl, sizeof(struct ieee80211_tx_control));
2811         out_cmd = &txq->cmd[idx];
2812         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2813         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2814         out_cmd->hdr.cmd = REPLY_TX;
2815         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2816                                 INDEX_TO_SEQ(q->first_empty)));
2817         /* copy frags header */
2818         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2819
2820         /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2821         len = priv->hw_setting.tx_cmd_len +
2822                 sizeof(struct iwl_cmd_header) + hdr_len;
2823
2824         len_org = len;
2825         len = (len + 3) & ~3;
2826
2827         if (len_org != len)
2828                 len_org = 1;
2829         else
2830                 len_org = 0;
2831
2832         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2833                      offsetof(struct iwl_cmd, hdr);
2834
2835         iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2836
2837         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2838                 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2839
2840         /* 802.11 null functions have no payload... */
2841         len = skb->len - hdr_len;
2842         if (len) {
2843                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2844                                            len, PCI_DMA_TODEVICE);
2845                 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2846         }
2847
2848         /* If there is no payload, then only one TFD is used */
2849         if (!len)
2850                 *control_flags = TFD_CTL_COUNT_SET(1);
2851         else
2852                 *control_flags = TFD_CTL_COUNT_SET(2) |
2853                         TFD_CTL_PAD_SET(U32_PAD(len));
2854
2855         len = (u16)skb->len;
2856         out_cmd->cmd.tx.len = cpu_to_le16(len);
2857
2858         /* TODO need this for burst mode later on */
2859         iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2860
2861         /* set is_hcca to 0; it probably will never be implemented */
2862         iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2863
2864         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2865         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2866
2867         if (!ieee80211_get_morefrag(hdr)) {
2868                 txq->need_update = 1;
2869                 if (qc) {
2870                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2871                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2872                 }
2873         } else {
2874                 wait_write_ptr = 1;
2875                 txq->need_update = 0;
2876         }
2877
2878         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2879                            sizeof(out_cmd->cmd.tx));
2880
2881         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2882                            ieee80211_get_hdrlen(fc));
2883
2884         q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
2885         rc = iwl_tx_queue_update_write_ptr(priv, txq);
2886         spin_unlock_irqrestore(&priv->lock, flags);
2887
2888         if (rc)
2889                 return rc;
2890
2891         if ((iwl_queue_space(q) < q->high_mark)
2892             && priv->mac80211_registered) {
2893                 if (wait_write_ptr) {
2894                         spin_lock_irqsave(&priv->lock, flags);
2895                         txq->need_update = 1;
2896                         iwl_tx_queue_update_write_ptr(priv, txq);
2897                         spin_unlock_irqrestore(&priv->lock, flags);
2898                 }
2899
2900                 ieee80211_stop_queue(priv->hw, ctl->queue);
2901         }
2902
2903         return 0;
2904
2905 drop_unlock:
2906         spin_unlock_irqrestore(&priv->lock, flags);
2907 drop:
2908         return -1;
2909 }
2910
2911 static void iwl_set_rate(struct iwl_priv *priv)
2912 {
2913         const struct ieee80211_hw_mode *hw = NULL;
2914         struct ieee80211_rate *rate;
2915         int i;
2916
2917         hw = iwl_get_hw_mode(priv, priv->phymode);
2918
2919         priv->active_rate = 0;
2920         priv->active_rate_basic = 0;
2921
2922         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
2923                        hw->mode == MODE_IEEE80211A ?
2924                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
2925
2926         for (i = 0; i < hw->num_rates; i++) {
2927                 rate = &(hw->rates[i]);
2928                 if ((rate->val < IWL_RATE_COUNT) &&
2929                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
2930                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
2931                                        rate->val, iwl_rates[rate->val].plcp,
2932                                        (rate->flags & IEEE80211_RATE_BASIC) ?
2933                                        "*" : "");
2934                         priv->active_rate |= (1 << rate->val);
2935                         if (rate->flags & IEEE80211_RATE_BASIC)
2936                                 priv->active_rate_basic |= (1 << rate->val);
2937                 } else
2938                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
2939                                        rate->val, iwl_rates[rate->val].plcp);
2940         }
2941
2942         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2943                        priv->active_rate, priv->active_rate_basic);
2944
2945         /*
2946          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2947          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2948          * OFDM
2949          */
2950         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2951                 priv->staging_rxon.cck_basic_rates =
2952                     ((priv->active_rate_basic &
2953                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2954         else
2955                 priv->staging_rxon.cck_basic_rates =
2956                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2957
2958         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2959                 priv->staging_rxon.ofdm_basic_rates =
2960                     ((priv->active_rate_basic &
2961                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2962                       IWL_FIRST_OFDM_RATE) & 0xFF;
2963         else
2964                 priv->staging_rxon.ofdm_basic_rates =
2965                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2966 }
2967
2968 static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2969 {
2970         unsigned long flags;
2971
2972         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2973                 return;
2974
2975         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2976                           disable_radio ? "OFF" : "ON");
2977
2978         if (disable_radio) {
2979                 iwl_scan_cancel(priv);
2980                 /* FIXME: This is a workaround for AP */
2981                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2982                         spin_lock_irqsave(&priv->lock, flags);
2983                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2984                                     CSR_UCODE_SW_BIT_RFKILL);
2985                         spin_unlock_irqrestore(&priv->lock, flags);
2986                         iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2987                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2988                 }
2989                 return;
2990         }
2991
2992         spin_lock_irqsave(&priv->lock, flags);
2993         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2994
2995         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2996         spin_unlock_irqrestore(&priv->lock, flags);
2997
2998         /* wake up ucode */
2999         msleep(10);
3000
3001         spin_lock_irqsave(&priv->lock, flags);
3002         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3003         if (!iwl_grab_restricted_access(priv))
3004                 iwl_release_restricted_access(priv);
3005         spin_unlock_irqrestore(&priv->lock, flags);
3006
3007         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3008                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3009                                   "disabled by HW switch\n");
3010                 return;
3011         }
3012
3013         queue_work(priv->workqueue, &priv->restart);
3014         return;
3015 }
3016
3017 void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3018                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3019 {
3020         u16 fc =
3021             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3022
3023         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3024                 return;
3025
3026         if (!(fc & IEEE80211_FCTL_PROTECTED))
3027                 return;
3028
3029         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3030         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3031         case RX_RES_STATUS_SEC_TYPE_TKIP:
3032                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3033                     RX_RES_STATUS_BAD_ICV_MIC)
3034                         stats->flag |= RX_FLAG_MMIC_ERROR;
3035         case RX_RES_STATUS_SEC_TYPE_WEP:
3036         case RX_RES_STATUS_SEC_TYPE_CCMP:
3037                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3038                     RX_RES_STATUS_DECRYPT_OK) {
3039                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3040                         stats->flag |= RX_FLAG_DECRYPTED;
3041                 }
3042                 break;
3043
3044         default:
3045                 break;
3046         }
3047 }
3048
3049 void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3050                                     struct iwl_rx_mem_buffer *rxb,
3051                                     void *data, short len,
3052                                     struct ieee80211_rx_status *stats,
3053                                     u16 phy_flags)
3054 {
3055         struct iwl_rt_rx_hdr *iwl_rt;
3056
3057         /* First cache any information we need before we overwrite
3058          * the information provided in the skb from the hardware */
3059         s8 signal = stats->ssi;
3060         s8 noise = 0;
3061         int rate = stats->rate;
3062         u64 tsf = stats->mactime;
3063         __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3064
3065         /* We received data from the HW, so stop the watchdog */
3066         if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3067                 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3068                 return;
3069         }
3070
3071         /* copy the frame data to write after where the radiotap header goes */
3072         iwl_rt = (void *)rxb->skb->data;
3073         memmove(iwl_rt->payload, data, len);
3074
3075         iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3076         iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3077
3078         /* total header + data */
3079         iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3080
3081         /* Set the size of the skb to the size of the frame */
3082         skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3083
3084         /* Big bitfield of all the fields we provide in radiotap */
3085         iwl_rt->rt_hdr.it_present =
3086             cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3087                         (1 << IEEE80211_RADIOTAP_FLAGS) |
3088                         (1 << IEEE80211_RADIOTAP_RATE) |
3089                         (1 << IEEE80211_RADIOTAP_CHANNEL) |
3090                         (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3091                         (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3092                         (1 << IEEE80211_RADIOTAP_ANTENNA));
3093
3094         /* Zero the flags, we'll add to them as we go */
3095         iwl_rt->rt_flags = 0;
3096
3097         iwl_rt->rt_tsf = cpu_to_le64(tsf);
3098
3099         /* Convert to dBm */
3100         iwl_rt->rt_dbmsignal = signal;
3101         iwl_rt->rt_dbmnoise = noise;
3102
3103         /* Convert the channel frequency and set the flags */
3104         iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3105         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3106                 iwl_rt->rt_chbitmask =
3107                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3108         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3109                 iwl_rt->rt_chbitmask =
3110                     cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3111         else    /* 802.11g */
3112                 iwl_rt->rt_chbitmask =
3113                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3114
3115         rate = iwl_rate_index_from_plcp(rate);
3116         if (rate == -1)
3117                 iwl_rt->rt_rate = 0;
3118         else
3119                 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3120
3121         /* antenna number */
3122         iwl_rt->rt_antenna =
3123                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3124
3125         /* set the preamble flag if we have it */
3126         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3127                 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3128
3129         IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3130
3131         stats->flag |= RX_FLAG_RADIOTAP;
3132         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3133         rxb->skb = NULL;
3134 }
3135
3136
3137 #define IWL_PACKET_RETRY_TIME HZ
3138
3139 int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3140 {
3141         u16 sc = le16_to_cpu(header->seq_ctrl);
3142         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3143         u16 frag = sc & IEEE80211_SCTL_FRAG;
3144         u16 *last_seq, *last_frag;
3145         unsigned long *last_time;
3146
3147         switch (priv->iw_mode) {
3148         case IEEE80211_IF_TYPE_IBSS:{
3149                 struct list_head *p;
3150                 struct iwl_ibss_seq *entry = NULL;
3151                 u8 *mac = header->addr2;
3152                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3153
3154                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3155                         entry =
3156                                 list_entry(p, struct iwl_ibss_seq, list);
3157                         if (!compare_ether_addr(entry->mac, mac))
3158                                 break;
3159                 }
3160                 if (p == &priv->ibss_mac_hash[index]) {
3161                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3162                         if (!entry) {
3163                                 IWL_ERROR
3164                                         ("Cannot malloc new mac entry\n");
3165                                 return 0;
3166                         }
3167                         memcpy(entry->mac, mac, ETH_ALEN);
3168                         entry->seq_num = seq;
3169                         entry->frag_num = frag;
3170                         entry->packet_time = jiffies;
3171                         list_add(&entry->list,
3172                                  &priv->ibss_mac_hash[index]);
3173                         return 0;
3174                 }
3175                 last_seq = &entry->seq_num;
3176                 last_frag = &entry->frag_num;
3177                 last_time = &entry->packet_time;
3178                 break;
3179         }
3180         case IEEE80211_IF_TYPE_STA:
3181                 last_seq = &priv->last_seq_num;
3182                 last_frag = &priv->last_frag_num;
3183                 last_time = &priv->last_packet_time;
3184                 break;
3185         default:
3186                 return 0;
3187         }
3188         if ((*last_seq == seq) &&
3189             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3190                 if (*last_frag == frag)
3191                         goto drop;
3192                 if (*last_frag + 1 != frag)
3193                         /* out-of-order fragment */
3194                         goto drop;
3195         } else
3196                 *last_seq = seq;
3197
3198         *last_frag = frag;
3199         *last_time = jiffies;
3200         return 0;
3201
3202  drop:
3203         return 1;
3204 }
3205
3206 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3207
3208 #include "iwl-spectrum.h"
3209
3210 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3211 #define BEACON_TIME_MASK_HIGH   0xFF000000
3212 #define TIME_UNIT               1024
3213
3214 /*
3215  * extended beacon time format
3216  * time in usec will be changed into a 32-bit value in 8:24 format
3217  * the high 1 byte is the beacon counts
3218  * the lower 3 bytes is the time in usec within one beacon interval
3219  */
3220
3221 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3222 {
3223         u32 quot;
3224         u32 rem;
3225         u32 interval = beacon_interval * 1024;
3226
3227         if (!interval || !usec)
3228                 return 0;
3229
3230         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3231         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3232
3233         return (quot << 24) + rem;
3234 }
3235
3236 /* base is usually what we get from ucode with each received frame,
3237  * the same as HW timer counter counting down
3238  */
3239
3240 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3241 {
3242         u32 base_low = base & BEACON_TIME_MASK_LOW;
3243         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3244         u32 interval = beacon_interval * TIME_UNIT;
3245         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3246             (addon & BEACON_TIME_MASK_HIGH);
3247
3248         if (base_low > addon_low)
3249                 res += base_low - addon_low;
3250         else if (base_low < addon_low) {
3251                 res += interval + base_low - addon_low;
3252                 res += (1 << 24);
3253         } else
3254                 res += (1 << 24);
3255
3256         return cpu_to_le32(res);
3257 }
3258
3259 static int iwl_get_measurement(struct iwl_priv *priv,
3260                                struct ieee80211_measurement_params *params,
3261                                u8 type)
3262 {
3263         struct iwl_spectrum_cmd spectrum;
3264         struct iwl_rx_packet *res;
3265         struct iwl_host_cmd cmd = {
3266                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3267                 .data = (void *)&spectrum,
3268                 .meta.flags = CMD_WANT_SKB,
3269         };
3270         u32 add_time = le64_to_cpu(params->start_time);
3271         int rc;
3272         int spectrum_resp_status;
3273         int duration = le16_to_cpu(params->duration);
3274
3275         if (iwl_is_associated(priv))
3276                 add_time =
3277                     iwl_usecs_to_beacons(
3278                         le64_to_cpu(params->start_time) - priv->last_tsf,
3279                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3280
3281         memset(&spectrum, 0, sizeof(spectrum));
3282
3283         spectrum.channel_count = cpu_to_le16(1);
3284         spectrum.flags =
3285             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3286         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3287         cmd.len = sizeof(spectrum);
3288         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3289
3290         if (iwl_is_associated(priv))
3291                 spectrum.start_time =
3292                     iwl_add_beacon_time(priv->last_beacon_time,
3293                                 add_time,
3294                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3295         else
3296                 spectrum.start_time = 0;
3297
3298         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3299         spectrum.channels[0].channel = params->channel;
3300         spectrum.channels[0].type = type;
3301         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3302                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3303                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3304
3305         rc = iwl_send_cmd_sync(priv, &cmd);
3306         if (rc)
3307                 return rc;
3308
3309         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3310         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3311                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3312                 rc = -EIO;
3313         }
3314
3315         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3316         switch (spectrum_resp_status) {
3317         case 0:         /* Command will be handled */
3318                 if (res->u.spectrum.id != 0xff) {
3319                         IWL_DEBUG_INFO
3320                             ("Replaced existing measurement: %d\n",
3321                              res->u.spectrum.id);
3322                         priv->measurement_status &= ~MEASUREMENT_READY;
3323                 }
3324                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3325                 rc = 0;
3326                 break;
3327
3328         case 1:         /* Command will not be handled */
3329                 rc = -EAGAIN;
3330                 break;
3331         }
3332
3333         dev_kfree_skb_any(cmd.meta.u.skb);
3334
3335         return rc;
3336 }
3337 #endif
3338
3339 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3340                                  struct iwl_tx_info *tx_sta)
3341 {
3342
3343         tx_sta->status.ack_signal = 0;
3344         tx_sta->status.excessive_retries = 0;
3345         tx_sta->status.queue_length = 0;
3346         tx_sta->status.queue_number = 0;
3347
3348         if (in_interrupt())
3349                 ieee80211_tx_status_irqsafe(priv->hw,
3350                                             tx_sta->skb[0], &(tx_sta->status));
3351         else
3352                 ieee80211_tx_status(priv->hw,
3353                                     tx_sta->skb[0], &(tx_sta->status));
3354
3355         tx_sta->skb[0] = NULL;
3356 }
3357
3358 /**
3359  * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3360  *
3361  * When FW advances 'R' index, all entries between old and
3362  * new 'R' index need to be reclaimed. As result, some free space
3363  * forms. If there is enough free space (> low mark), wake Tx queue.
3364  */
3365 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3366 {
3367         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3368         struct iwl_queue *q = &txq->q;
3369         int nfreed = 0;
3370
3371         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3372                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3373                           "is out of range [0-%d] %d %d.\n", txq_id,
3374                           index, q->n_bd, q->first_empty, q->last_used);
3375                 return 0;
3376         }
3377
3378         for (index = iwl_queue_inc_wrap(index, q->n_bd);
3379                 q->last_used != index;
3380                 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
3381                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3382                         iwl_txstatus_to_ieee(priv,
3383                                         &(txq->txb[txq->q.last_used]));
3384                         iwl_hw_txq_free_tfd(priv, txq);
3385                 } else if (nfreed > 1) {
3386                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3387                                         q->first_empty, q->last_used);
3388                         queue_work(priv->workqueue, &priv->restart);
3389                 }
3390                 nfreed++;
3391         }
3392
3393         if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3394                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3395                         priv->mac80211_registered)
3396                 ieee80211_wake_queue(priv->hw, txq_id);
3397
3398
3399         return nfreed;
3400 }
3401
3402 static int iwl_is_tx_success(u32 status)
3403 {
3404         return (status & 0xFF) == 0x1;
3405 }
3406
3407 /******************************************************************************
3408  *
3409  * Generic RX handler implementations
3410  *
3411  ******************************************************************************/
3412 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3413                             struct iwl_rx_mem_buffer *rxb)
3414 {
3415         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3416         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3417         int txq_id = SEQ_TO_QUEUE(sequence);
3418         int index = SEQ_TO_INDEX(sequence);
3419         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3420         struct ieee80211_tx_status *tx_status;
3421         struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3422         u32  status = le32_to_cpu(tx_resp->status);
3423
3424         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3425                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3426                           "is out of range [0-%d] %d %d\n", txq_id,
3427                           index, txq->q.n_bd, txq->q.first_empty,
3428                           txq->q.last_used);
3429                 return;
3430         }
3431
3432         tx_status = &(txq->txb[txq->q.last_used].status);
3433
3434         tx_status->retry_count = tx_resp->failure_frame;
3435         tx_status->queue_number = status;
3436         tx_status->queue_length = tx_resp->bt_kill_count;
3437         tx_status->queue_length |= tx_resp->failure_rts;
3438
3439         tx_status->flags =
3440             iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3441
3442         tx_status->control.tx_rate = iwl_rate_index_from_plcp(tx_resp->rate);
3443
3444         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3445                         txq_id, iwl_get_tx_fail_reason(status), status,
3446                         tx_resp->rate, tx_resp->failure_frame);
3447
3448         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3449         if (index != -1)
3450                 iwl_tx_queue_reclaim(priv, txq_id, index);
3451
3452         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3453                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3454 }
3455
3456
3457 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3458                                struct iwl_rx_mem_buffer *rxb)
3459 {
3460         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3461         struct iwl_alive_resp *palive;
3462         struct delayed_work *pwork;
3463
3464         palive = &pkt->u.alive_frame;
3465
3466         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3467                        "0x%01X 0x%01X\n",
3468                        palive->is_valid, palive->ver_type,
3469                        palive->ver_subtype);
3470
3471         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3472                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3473                 memcpy(&priv->card_alive_init,
3474                        &pkt->u.alive_frame,
3475                        sizeof(struct iwl_init_alive_resp));
3476                 pwork = &priv->init_alive_start;
3477         } else {
3478                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3479                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3480                        sizeof(struct iwl_alive_resp));
3481                 pwork = &priv->alive_start;
3482                 iwl_disable_events(priv);
3483         }
3484
3485         /* We delay the ALIVE response by 5ms to
3486          * give the HW RF Kill time to activate... */
3487         if (palive->is_valid == UCODE_VALID_OK)
3488                 queue_delayed_work(priv->workqueue, pwork,
3489                                    msecs_to_jiffies(5));
3490         else
3491                 IWL_WARNING("uCode did not respond OK.\n");
3492 }
3493
3494 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3495                                  struct iwl_rx_mem_buffer *rxb)
3496 {
3497         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3498
3499         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3500         return;
3501 }
3502
3503 static void iwl_rx_reply_error(struct iwl_priv *priv,
3504                                struct iwl_rx_mem_buffer *rxb)
3505 {
3506         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3507
3508         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3509                 "seq 0x%04X ser 0x%08X\n",
3510                 le32_to_cpu(pkt->u.err_resp.error_type),
3511                 get_cmd_string(pkt->u.err_resp.cmd_id),
3512                 pkt->u.err_resp.cmd_id,
3513                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3514                 le32_to_cpu(pkt->u.err_resp.error_info));
3515 }
3516
3517 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3518
3519 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3520 {
3521         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3522         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3523         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3524         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3525                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3526         rxon->channel = csa->channel;
3527         priv->staging_rxon.channel = csa->channel;
3528 }
3529
3530 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3531                                           struct iwl_rx_mem_buffer *rxb)
3532 {
3533 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3534         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3535         struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3536
3537         if (!report->state) {
3538                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3539                           "Spectrum Measure Notification: Start\n");
3540                 return;
3541         }
3542
3543         memcpy(&priv->measure_report, report, sizeof(*report));
3544         priv->measurement_status |= MEASUREMENT_READY;
3545 #endif
3546 }
3547
3548 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3549                                   struct iwl_rx_mem_buffer *rxb)
3550 {
3551 #ifdef CONFIG_IWLWIFI_DEBUG
3552         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3553         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3554         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3555                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3556 #endif
3557 }
3558
3559 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3560                                              struct iwl_rx_mem_buffer *rxb)
3561 {
3562         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3563         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3564                         "notification for %s:\n",
3565                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3566         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3567 }
3568
3569 static void iwl_bg_beacon_update(struct work_struct *work)
3570 {
3571         struct iwl_priv *priv =
3572                 container_of(work, struct iwl_priv, beacon_update);
3573         struct sk_buff *beacon;
3574
3575         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3576         beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3577
3578         if (!beacon) {
3579                 IWL_ERROR("update beacon failed\n");
3580                 return;
3581         }
3582
3583         mutex_lock(&priv->mutex);
3584         /* new beacon skb is allocated every time; dispose previous.*/
3585         if (priv->ibss_beacon)
3586                 dev_kfree_skb(priv->ibss_beacon);
3587
3588         priv->ibss_beacon = beacon;
3589         mutex_unlock(&priv->mutex);
3590
3591         iwl_send_beacon_cmd(priv);
3592 }
3593
3594 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3595                                 struct iwl_rx_mem_buffer *rxb)
3596 {
3597 #ifdef CONFIG_IWLWIFI_DEBUG
3598         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3599         struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3600         u8 rate = beacon->beacon_notify_hdr.rate;
3601
3602         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3603                 "tsf %d %d rate %d\n",
3604                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3605                 beacon->beacon_notify_hdr.failure_frame,
3606                 le32_to_cpu(beacon->ibss_mgr_status),
3607                 le32_to_cpu(beacon->high_tsf),
3608                 le32_to_cpu(beacon->low_tsf), rate);
3609 #endif
3610
3611         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3612             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3613                 queue_work(priv->workqueue, &priv->beacon_update);
3614 }
3615
3616 /* Service response to REPLY_SCAN_CMD (0x80) */
3617 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3618                               struct iwl_rx_mem_buffer *rxb)
3619 {
3620 #ifdef CONFIG_IWLWIFI_DEBUG
3621         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3622         struct iwl_scanreq_notification *notif =
3623             (struct iwl_scanreq_notification *)pkt->u.raw;
3624
3625         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3626 #endif
3627 }
3628
3629 /* Service SCAN_START_NOTIFICATION (0x82) */
3630 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3631                                     struct iwl_rx_mem_buffer *rxb)
3632 {
3633         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3634         struct iwl_scanstart_notification *notif =
3635             (struct iwl_scanstart_notification *)pkt->u.raw;
3636         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3637         IWL_DEBUG_SCAN("Scan start: "
3638                        "%d [802.11%s] "
3639                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3640                        notif->channel,
3641                        notif->band ? "bg" : "a",
3642                        notif->tsf_high,
3643                        notif->tsf_low, notif->status, notif->beacon_timer);
3644 }
3645
3646 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3647 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3648                                       struct iwl_rx_mem_buffer *rxb)
3649 {
3650         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3651         struct iwl_scanresults_notification *notif =
3652             (struct iwl_scanresults_notification *)pkt->u.raw;
3653
3654         IWL_DEBUG_SCAN("Scan ch.res: "
3655                        "%d [802.11%s] "
3656                        "(TSF: 0x%08X:%08X) - %d "
3657                        "elapsed=%lu usec (%dms since last)\n",
3658                        notif->channel,
3659                        notif->band ? "bg" : "a",
3660                        le32_to_cpu(notif->tsf_high),
3661                        le32_to_cpu(notif->tsf_low),
3662                        le32_to_cpu(notif->statistics[0]),
3663                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3664                        jiffies_to_msecs(elapsed_jiffies
3665                                         (priv->last_scan_jiffies, jiffies)));
3666
3667         priv->last_scan_jiffies = jiffies;
3668 }
3669
3670 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3671 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3672                                        struct iwl_rx_mem_buffer *rxb)
3673 {
3674         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3675         struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3676
3677         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3678                        scan_notif->scanned_channels,
3679                        scan_notif->tsf_low,
3680                        scan_notif->tsf_high, scan_notif->status);
3681
3682         /* The HW is no longer scanning */
3683         clear_bit(STATUS_SCAN_HW, &priv->status);
3684
3685         /* The scan completion notification came in, so kill that timer... */
3686         cancel_delayed_work(&priv->scan_check);
3687
3688         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3689                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3690                        jiffies_to_msecs(elapsed_jiffies
3691                                         (priv->scan_pass_start, jiffies)));
3692
3693         /* Remove this scanned band from the list
3694          * of pending bands to scan */
3695         priv->scan_bands--;
3696
3697         /* If a request to abort was given, or the scan did not succeed
3698          * then we reset the scan state machine and terminate,
3699          * re-queuing another scan if one has been requested */
3700         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3701                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3702                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3703         } else {
3704                 /* If there are more bands on this scan pass reschedule */
3705                 if (priv->scan_bands > 0)
3706                         goto reschedule;
3707         }
3708
3709         priv->last_scan_jiffies = jiffies;
3710         IWL_DEBUG_INFO("Setting scan to off\n");
3711
3712         clear_bit(STATUS_SCANNING, &priv->status);
3713
3714         IWL_DEBUG_INFO("Scan took %dms\n",
3715                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3716
3717         queue_work(priv->workqueue, &priv->scan_completed);
3718
3719         return;
3720
3721 reschedule:
3722         priv->scan_pass_start = jiffies;
3723         queue_work(priv->workqueue, &priv->request_scan);
3724 }
3725
3726 /* Handle notification from uCode that card's power state is changing
3727  * due to software, hardware, or critical temperature RFKILL */
3728 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
3729                                     struct iwl_rx_mem_buffer *rxb)
3730 {
3731         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3732         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3733         unsigned long status = priv->status;
3734
3735         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3736                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3737                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3738
3739         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3740                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3741
3742         if (flags & HW_CARD_DISABLED)
3743                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3744         else
3745                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3746
3747
3748         if (flags & SW_CARD_DISABLED)
3749                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3750         else
3751                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3752
3753         iwl_scan_cancel(priv);
3754
3755         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3756              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3757             (test_bit(STATUS_RF_KILL_SW, &status) !=
3758              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3759                 queue_work(priv->workqueue, &priv->rf_kill);
3760         else
3761                 wake_up_interruptible(&priv->wait_command_queue);
3762 }
3763
3764 /**
3765  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
3766  *
3767  * Setup the RX handlers for each of the reply types sent from the uCode
3768  * to the host.
3769  *
3770  * This function chains into the hardware specific files for them to setup
3771  * any hardware specific handlers as well.
3772  */
3773 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
3774 {
3775         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
3776         priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
3777         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
3778         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
3779         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3780             iwl_rx_spectrum_measure_notif;
3781         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
3782         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3783             iwl_rx_pm_debug_statistics_notif;
3784         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
3785
3786         /* NOTE:  iwl_rx_statistics is different based on whether
3787          * the build is for the 3945 or the 4965.  See the
3788          * corresponding implementation in iwl-XXXX.c
3789          *
3790          * The same handler is used for both the REPLY to a
3791          * discrete statistics request from the host as well as
3792          * for the periodic statistics notification from the uCode
3793          */
3794         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
3795         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
3796
3797         priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
3798         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
3799         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3800             iwl_rx_scan_results_notif;
3801         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3802             iwl_rx_scan_complete_notif;
3803         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
3804         priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
3805
3806         /* Setup hardware specific Rx handlers */
3807         iwl_hw_rx_handler_setup(priv);
3808 }
3809
3810 /**
3811  * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3812  * @rxb: Rx buffer to reclaim
3813  *
3814  * If an Rx buffer has an async callback associated with it the callback
3815  * will be executed.  The attached skb (if present) will only be freed
3816  * if the callback returns 1
3817  */
3818 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
3819                                 struct iwl_rx_mem_buffer *rxb)
3820 {
3821         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3822         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3823         int txq_id = SEQ_TO_QUEUE(sequence);
3824         int index = SEQ_TO_INDEX(sequence);
3825         int huge = sequence & SEQ_HUGE_FRAME;
3826         int cmd_index;
3827         struct iwl_cmd *cmd;
3828
3829         /* If a Tx command is being handled and it isn't in the actual
3830          * command queue then there a command routing bug has been introduced
3831          * in the queue management code. */
3832         if (txq_id != IWL_CMD_QUEUE_NUM)
3833                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3834                           txq_id, pkt->hdr.cmd);
3835         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3836
3837         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3838         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3839
3840         /* Input error checking is done when commands are added to queue. */
3841         if (cmd->meta.flags & CMD_WANT_SKB) {
3842                 cmd->meta.source->u.skb = rxb->skb;
3843                 rxb->skb = NULL;
3844         } else if (cmd->meta.u.callback &&
3845                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3846                 rxb->skb = NULL;
3847
3848         iwl_tx_queue_reclaim(priv, txq_id, index);
3849
3850         if (!(cmd->meta.flags & CMD_ASYNC)) {
3851                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3852                 wake_up_interruptible(&priv->wait_command_queue);
3853         }
3854 }
3855
3856 /************************** RX-FUNCTIONS ****************************/
3857 /*
3858  * Rx theory of operation
3859  *
3860  * The host allocates 32 DMA target addresses and passes the host address
3861  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3862  * 0 to 31
3863  *
3864  * Rx Queue Indexes
3865  * The host/firmware share two index registers for managing the Rx buffers.
3866  *
3867  * The READ index maps to the first position that the firmware may be writing
3868  * to -- the driver can read up to (but not including) this position and get
3869  * good data.
3870  * The READ index is managed by the firmware once the card is enabled.
3871  *
3872  * The WRITE index maps to the last position the driver has read from -- the
3873  * position preceding WRITE is the last slot the firmware can place a packet.
3874  *
3875  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3876  * WRITE = READ.
3877  *
3878  * During initialization the host sets up the READ queue position to the first
3879  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3880  *
3881  * When the firmware places a packet in a buffer it will advance the READ index
3882  * and fire the RX interrupt.  The driver can then query the READ index and
3883  * process as many packets as possible, moving the WRITE index forward as it
3884  * resets the Rx queue buffers with new memory.
3885  *
3886  * The management in the driver is as follows:
3887  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3888  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3889  *   to replensish the iwl->rxq->rx_free.
3890  * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
3891  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3892  *   'processed' and 'read' driver indexes as well)
3893  * + A received packet is processed and handed to the kernel network stack,
3894  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3895  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3896  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3897  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3898  *   were enough free buffers and RX_STALLED is set it is cleared.
3899  *
3900  *
3901  * Driver sequence:
3902  *
3903  * iwl_rx_queue_alloc()       Allocates rx_free
3904  * iwl_rx_replenish()         Replenishes rx_free list from rx_used, and calls
3905  *                            iwl_rx_queue_restock
3906  * iwl_rx_queue_restock()     Moves available buffers from rx_free into Rx
3907  *                            queue, updates firmware pointers, and updates
3908  *                            the WRITE index.  If insufficient rx_free buffers
3909  *                            are available, schedules iwl_rx_replenish
3910  *
3911  * -- enable interrupts --
3912  * ISR - iwl_rx()             Detach iwl_rx_mem_buffers from pool up to the
3913  *                            READ INDEX, detaching the SKB from the pool.
3914  *                            Moves the packet buffer from queue to rx_used.
3915  *                            Calls iwl_rx_queue_restock to refill any empty
3916  *                            slots.
3917  * ...
3918  *
3919  */
3920
3921 /**
3922  * iwl_rx_queue_space - Return number of free slots available in queue.
3923  */
3924 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
3925 {
3926         int s = q->read - q->write;
3927         if (s <= 0)
3928                 s += RX_QUEUE_SIZE;
3929         /* keep some buffer to not confuse full and empty queue */
3930         s -= 2;
3931         if (s < 0)
3932                 s = 0;
3933         return s;
3934 }
3935
3936 /**
3937  * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3938  *
3939  * NOTE: This function has 3945 and 4965 specific code sections
3940  * but is declared in base due to the majority of the
3941  * implementation being the same (only a numeric constant is
3942  * different)
3943  *
3944  */
3945 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
3946 {
3947         u32 reg = 0;
3948         int rc = 0;
3949         unsigned long flags;
3950
3951         spin_lock_irqsave(&q->lock, flags);
3952
3953         if (q->need_update == 0)
3954                 goto exit_unlock;
3955
3956         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3957                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3958
3959                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3960                         iwl_set_bit(priv, CSR_GP_CNTRL,
3961                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3962                         goto exit_unlock;
3963                 }
3964
3965                 rc = iwl_grab_restricted_access(priv);
3966                 if (rc)
3967                         goto exit_unlock;
3968
3969                 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
3970                                      q->write & ~0x7);
3971                 iwl_release_restricted_access(priv);
3972         } else
3973                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3974
3975
3976         q->need_update = 0;
3977
3978  exit_unlock:
3979         spin_unlock_irqrestore(&q->lock, flags);
3980         return rc;
3981 }
3982
3983 /**
3984  * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
3985  *
3986  * NOTE: This function has 3945 and 4965 specific code paths in it.
3987  */
3988 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
3989                                           dma_addr_t dma_addr)
3990 {
3991         return cpu_to_le32((u32)dma_addr);
3992 }
3993
3994 /**
3995  * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
3996  *
3997  * If there are slots in the RX queue that  need to be restocked,
3998  * and we have free pre-allocated buffers, fill the ranks as much
3999  * as we can pulling from rx_free.
4000  *
4001  * This moves the 'write' index forward to catch up with 'processed', and
4002  * also updates the memory address in the firmware to reference the new
4003  * target buffer.
4004  */
4005 int iwl_rx_queue_restock(struct iwl_priv *priv)
4006 {
4007         struct iwl_rx_queue *rxq = &priv->rxq;
4008         struct list_head *element;
4009         struct iwl_rx_mem_buffer *rxb;
4010         unsigned long flags;
4011         int write, rc;
4012
4013         spin_lock_irqsave(&rxq->lock, flags);
4014         write = rxq->write & ~0x7;
4015         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4016                 element = rxq->rx_free.next;
4017                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4018                 list_del(element);
4019                 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4020                 rxq->queue[rxq->write] = rxb;
4021                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4022                 rxq->free_count--;
4023         }
4024         spin_unlock_irqrestore(&rxq->lock, flags);
4025         /* If the pre-allocated buffer pool is dropping low, schedule to
4026          * refill it */
4027         if (rxq->free_count <= RX_LOW_WATERMARK)
4028                 queue_work(priv->workqueue, &priv->rx_replenish);
4029
4030
4031         /* If we've added more space for the firmware to place data, tell it */
4032         if ((write != (rxq->write & ~0x7))
4033             || (abs(rxq->write - rxq->read) > 7)) {
4034                 spin_lock_irqsave(&rxq->lock, flags);
4035                 rxq->need_update = 1;
4036                 spin_unlock_irqrestore(&rxq->lock, flags);
4037                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4038                 if (rc)
4039                         return rc;
4040         }
4041
4042         return 0;
4043 }
4044
4045 /**
4046  * iwl_rx_replensih - Move all used packet from rx_used to rx_free
4047  *
4048  * When moving to rx_free an SKB is allocated for the slot.
4049  *
4050  * Also restock the Rx queue via iwl_rx_queue_restock.
4051  * This is called as a scheduled work item (except for during intialization)
4052  */
4053 void iwl_rx_replenish(void *data)
4054 {
4055         struct iwl_priv *priv = data;
4056         struct iwl_rx_queue *rxq = &priv->rxq;
4057         struct list_head *element;
4058         struct iwl_rx_mem_buffer *rxb;
4059         unsigned long flags;
4060         spin_lock_irqsave(&rxq->lock, flags);
4061         while (!list_empty(&rxq->rx_used)) {
4062                 element = rxq->rx_used.next;
4063                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4064                 rxb->skb =
4065                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4066                 if (!rxb->skb) {
4067                         if (net_ratelimit())
4068                                 printk(KERN_CRIT DRV_NAME
4069                                        ": Can not allocate SKB buffers\n");
4070                         /* We don't reschedule replenish work here -- we will
4071                          * call the restock method and if it still needs
4072                          * more buffers it will schedule replenish */
4073                         break;
4074                 }
4075                 priv->alloc_rxb_skb++;
4076                 list_del(element);
4077                 rxb->dma_addr =
4078                     pci_map_single(priv->pci_dev, rxb->skb->data,
4079                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4080                 list_add_tail(&rxb->list, &rxq->rx_free);
4081                 rxq->free_count++;
4082         }
4083         spin_unlock_irqrestore(&rxq->lock, flags);
4084
4085         spin_lock_irqsave(&priv->lock, flags);
4086         iwl_rx_queue_restock(priv);
4087         spin_unlock_irqrestore(&priv->lock, flags);
4088 }
4089
4090 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4091  * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4092  * This free routine walks the list of POOL entries and if SKB is set to
4093  * non NULL it is unmapped and freed
4094  */
4095 void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4096 {
4097         int i;
4098         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4099                 if (rxq->pool[i].skb != NULL) {
4100                         pci_unmap_single(priv->pci_dev,
4101                                          rxq->pool[i].dma_addr,
4102                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4103                         dev_kfree_skb(rxq->pool[i].skb);
4104                 }
4105         }
4106
4107         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4108                             rxq->dma_addr);
4109         rxq->bd = NULL;
4110 }
4111
4112 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4113 {
4114         struct iwl_rx_queue *rxq = &priv->rxq;
4115         struct pci_dev *dev = priv->pci_dev;
4116         int i;
4117
4118         spin_lock_init(&rxq->lock);
4119         INIT_LIST_HEAD(&rxq->rx_free);
4120         INIT_LIST_HEAD(&rxq->rx_used);
4121         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4122         if (!rxq->bd)
4123                 return -ENOMEM;
4124         /* Fill the rx_used queue with _all_ of the Rx buffers */
4125         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4126                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4127         /* Set us so that we have processed and used all buffers, but have
4128          * not restocked the Rx queue with fresh buffers */
4129         rxq->read = rxq->write = 0;
4130         rxq->free_count = 0;
4131         rxq->need_update = 0;
4132         return 0;
4133 }
4134
4135 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4136 {
4137         unsigned long flags;
4138         int i;
4139         spin_lock_irqsave(&rxq->lock, flags);
4140         INIT_LIST_HEAD(&rxq->rx_free);
4141         INIT_LIST_HEAD(&rxq->rx_used);
4142         /* Fill the rx_used queue with _all_ of the Rx buffers */
4143         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4144                 /* In the reset function, these buffers may have been allocated
4145                  * to an SKB, so we need to unmap and free potential storage */
4146                 if (rxq->pool[i].skb != NULL) {
4147                         pci_unmap_single(priv->pci_dev,
4148                                          rxq->pool[i].dma_addr,
4149                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4150                         priv->alloc_rxb_skb--;
4151                         dev_kfree_skb(rxq->pool[i].skb);
4152                         rxq->pool[i].skb = NULL;
4153                 }
4154                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4155         }
4156
4157         /* Set us so that we have processed and used all buffers, but have
4158          * not restocked the Rx queue with fresh buffers */
4159         rxq->read = rxq->write = 0;
4160         rxq->free_count = 0;
4161         spin_unlock_irqrestore(&rxq->lock, flags);
4162 }
4163
4164 /* Convert linear signal-to-noise ratio into dB */
4165 static u8 ratio2dB[100] = {
4166 /*       0   1   2   3   4   5   6   7   8   9 */
4167          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4168         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4169         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4170         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4171         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4172         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4173         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4174         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4175         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4176         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4177 };
4178
4179 /* Calculates a relative dB value from a ratio of linear
4180  *   (i.e. not dB) signal levels.
4181  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4182 int iwl_calc_db_from_ratio(int sig_ratio)
4183 {
4184         /* Anything above 1000:1 just report as 60 dB */
4185         if (sig_ratio > 1000)
4186                 return 60;
4187
4188         /* Above 100:1, divide by 10 and use table,
4189          *   add 20 dB to make up for divide by 10 */
4190         if (sig_ratio > 100)
4191                 return (20 + (int)ratio2dB[sig_ratio/10]);
4192
4193         /* We shouldn't see this */
4194         if (sig_ratio < 1)
4195                 return 0;
4196
4197         /* Use table for ratios 1:1 - 99:1 */
4198         return (int)ratio2dB[sig_ratio];
4199 }
4200
4201 #define PERFECT_RSSI (-20) /* dBm */
4202 #define WORST_RSSI (-95)   /* dBm */
4203 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4204
4205 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4206  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4207  *   about formulas used below. */
4208 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4209 {
4210         int sig_qual;
4211         int degradation = PERFECT_RSSI - rssi_dbm;
4212
4213         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4214          * as indicator; formula is (signal dbm - noise dbm).
4215          * SNR at or above 40 is a great signal (100%).
4216          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4217          * Weakest usable signal is usually 10 - 15 dB SNR. */
4218         if (noise_dbm) {
4219                 if (rssi_dbm - noise_dbm >= 40)
4220                         return 100;
4221                 else if (rssi_dbm < noise_dbm)
4222                         return 0;
4223                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4224
4225         /* Else use just the signal level.
4226          * This formula is a least squares fit of data points collected and
4227          *   compared with a reference system that had a percentage (%) display
4228          *   for signal quality. */
4229         } else
4230                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4231                             (15 * RSSI_RANGE + 62 * degradation)) /
4232                            (RSSI_RANGE * RSSI_RANGE);
4233
4234         if (sig_qual > 100)
4235                 sig_qual = 100;
4236         else if (sig_qual < 1)
4237                 sig_qual = 0;
4238
4239         return sig_qual;
4240 }
4241
4242 /**
4243  * iwl_rx_handle - Main entry function for receiving responses from the uCode
4244  *
4245  * Uses the priv->rx_handlers callback function array to invoke
4246  * the appropriate handlers, including command responses,
4247  * frame-received notifications, and other notifications.
4248  */
4249 static void iwl_rx_handle(struct iwl_priv *priv)
4250 {
4251         struct iwl_rx_mem_buffer *rxb;
4252         struct iwl_rx_packet *pkt;
4253         struct iwl_rx_queue *rxq = &priv->rxq;
4254         u32 r, i;
4255         int reclaim;
4256         unsigned long flags;
4257
4258         r = iwl_hw_get_rx_read(priv);
4259         i = rxq->read;
4260
4261         /* Rx interrupt, but nothing sent from uCode */
4262         if (i == r)
4263                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4264
4265         while (i != r) {
4266                 rxb = rxq->queue[i];
4267
4268                 /* If an RXB doesn't have a queue slot associated with it
4269                  * then a bug has been introduced in the queue refilling
4270                  * routines -- catch it here */
4271                 BUG_ON(rxb == NULL);
4272
4273                 rxq->queue[i] = NULL;
4274
4275                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4276                                             IWL_RX_BUF_SIZE,
4277                                             PCI_DMA_FROMDEVICE);
4278                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4279
4280                 /* Reclaim a command buffer only if this packet is a response
4281                  *   to a (driver-originated) command.
4282                  * If the packet (e.g. Rx frame) originated from uCode,
4283                  *   there is no command buffer to reclaim.
4284                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4285                  *   but apparently a few don't get set; catch them here. */
4286                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4287                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4288                         (pkt->hdr.cmd != REPLY_TX);
4289
4290                 /* Based on type of command response or notification,
4291                  *   handle those that need handling via function in
4292                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
4293                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4294                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4295                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4296                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4297                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4298                 } else {
4299                         /* No handling needed */
4300                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4301                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4302                                 r, i, get_cmd_string(pkt->hdr.cmd),
4303                                 pkt->hdr.cmd);
4304                 }
4305
4306                 if (reclaim) {
4307                         /* Invoke any callbacks, transfer the skb to caller,
4308                          * and fire off the (possibly) blocking iwl_send_cmd()
4309                          * as we reclaim the driver command queue */
4310                         if (rxb && rxb->skb)
4311                                 iwl_tx_cmd_complete(priv, rxb);
4312                         else
4313                                 IWL_WARNING("Claim null rxb?\n");
4314                 }
4315
4316                 /* For now we just don't re-use anything.  We can tweak this
4317                  * later to try and re-use notification packets and SKBs that
4318                  * fail to Rx correctly */
4319                 if (rxb->skb != NULL) {
4320                         priv->alloc_rxb_skb--;
4321                         dev_kfree_skb_any(rxb->skb);
4322                         rxb->skb = NULL;
4323                 }
4324
4325                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4326                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4327                 spin_lock_irqsave(&rxq->lock, flags);
4328                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4329                 spin_unlock_irqrestore(&rxq->lock, flags);
4330                 i = (i + 1) & RX_QUEUE_MASK;
4331         }
4332
4333         /* Backtrack one entry */
4334         priv->rxq.read = i;
4335         iwl_rx_queue_restock(priv);
4336 }
4337
4338 int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4339                                   struct iwl_tx_queue *txq)
4340 {
4341         u32 reg = 0;
4342         int rc = 0;
4343         int txq_id = txq->q.id;
4344
4345         if (txq->need_update == 0)
4346                 return rc;
4347
4348         /* if we're trying to save power */
4349         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4350                 /* wake up nic if it's powered down ...
4351                  * uCode will wake up, and interrupt us again, so next
4352                  * time we'll skip this part. */
4353                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4354
4355                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4356                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4357                         iwl_set_bit(priv, CSR_GP_CNTRL,
4358                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4359                         return rc;
4360                 }
4361
4362                 /* restore this queue's parameters in nic hardware. */
4363                 rc = iwl_grab_restricted_access(priv);
4364                 if (rc)
4365                         return rc;
4366                 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4367                                      txq->q.first_empty | (txq_id << 8));
4368                 iwl_release_restricted_access(priv);
4369
4370         /* else not in power-save mode, uCode will never sleep when we're
4371          * trying to tx (during RFKILL, we're not trying to tx). */
4372         } else
4373                 iwl_write32(priv, HBUS_TARG_WRPTR,
4374                             txq->q.first_empty | (txq_id << 8));
4375
4376         txq->need_update = 0;
4377
4378         return rc;
4379 }
4380
4381 #ifdef CONFIG_IWLWIFI_DEBUG
4382 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4383 {
4384         DECLARE_MAC_BUF(mac);
4385
4386         IWL_DEBUG_RADIO("RX CONFIG:\n");
4387         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4388         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4389         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4390         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4391                         le32_to_cpu(rxon->filter_flags));
4392         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4393         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4394                         rxon->ofdm_basic_rates);
4395         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4396         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4397                         print_mac(mac, rxon->node_addr));
4398         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4399                         print_mac(mac, rxon->bssid_addr));
4400         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4401 }
4402 #endif
4403
4404 static void iwl_enable_interrupts(struct iwl_priv *priv)
4405 {
4406         IWL_DEBUG_ISR("Enabling interrupts\n");
4407         set_bit(STATUS_INT_ENABLED, &priv->status);
4408         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4409 }
4410
4411 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4412 {
4413         clear_bit(STATUS_INT_ENABLED, &priv->status);
4414
4415         /* disable interrupts from uCode/NIC to host */
4416         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4417
4418         /* acknowledge/clear/reset any interrupts still pending
4419          * from uCode or flow handler (Rx/Tx DMA) */
4420         iwl_write32(priv, CSR_INT, 0xffffffff);
4421         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4422         IWL_DEBUG_ISR("Disabled interrupts\n");
4423 }
4424
4425 static const char *desc_lookup(int i)
4426 {
4427         switch (i) {
4428         case 1:
4429                 return "FAIL";
4430         case 2:
4431                 return "BAD_PARAM";
4432         case 3:
4433                 return "BAD_CHECKSUM";
4434         case 4:
4435                 return "NMI_INTERRUPT";
4436         case 5:
4437                 return "SYSASSERT";
4438         case 6:
4439                 return "FATAL_ERROR";
4440         }
4441
4442         return "UNKNOWN";
4443 }
4444
4445 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4446 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4447
4448 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4449 {
4450         u32 i;
4451         u32 desc, time, count, base, data1;
4452         u32 blink1, blink2, ilink1, ilink2;
4453         int rc;
4454
4455         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4456
4457         if (!iwl_hw_valid_rtc_data_addr(base)) {
4458                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4459                 return;
4460         }
4461
4462         rc = iwl_grab_restricted_access(priv);
4463         if (rc) {
4464                 IWL_WARNING("Can not read from adapter at this time.\n");
4465                 return;
4466         }
4467
4468         count = iwl_read_restricted_mem(priv, base);
4469
4470         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4471                 IWL_ERROR("Start IWL Error Log Dump:\n");
4472                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4473                           priv->status, priv->config, count);
4474         }
4475
4476         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4477                   "ilink1  nmiPC   Line\n");
4478         for (i = ERROR_START_OFFSET;
4479              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4480              i += ERROR_ELEM_SIZE) {
4481                 desc = iwl_read_restricted_mem(priv, base + i);
4482                 time =
4483                     iwl_read_restricted_mem(priv, base + i + 1 * sizeof(u32));
4484                 blink1 =
4485                     iwl_read_restricted_mem(priv, base + i + 2 * sizeof(u32));
4486                 blink2 =
4487                     iwl_read_restricted_mem(priv, base + i + 3 * sizeof(u32));
4488                 ilink1 =
4489                     iwl_read_restricted_mem(priv, base + i + 4 * sizeof(u32));
4490                 ilink2 =
4491                     iwl_read_restricted_mem(priv, base + i + 5 * sizeof(u32));
4492                 data1 =
4493                     iwl_read_restricted_mem(priv, base + i + 6 * sizeof(u32));
4494
4495                 IWL_ERROR
4496                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4497                      desc_lookup(desc), desc, time, blink1, blink2,
4498                      ilink1, ilink2, data1);
4499         }
4500
4501         iwl_release_restricted_access(priv);
4502
4503 }
4504
4505 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4506
4507 /**
4508  * iwl_print_event_log - Dump error event log to syslog
4509  *
4510  * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4511  */
4512 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4513                                 u32 num_events, u32 mode)
4514 {
4515         u32 i;
4516         u32 base;       /* SRAM byte address of event log header */
4517         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4518         u32 ptr;        /* SRAM byte address of log data */
4519         u32 ev, time, data; /* event log data */
4520
4521         if (num_events == 0)
4522                 return;
4523
4524         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4525
4526         if (mode == 0)
4527                 event_size = 2 * sizeof(u32);
4528         else
4529                 event_size = 3 * sizeof(u32);
4530
4531         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4532
4533         /* "time" is actually "data" for mode 0 (no timestamp).
4534          * place event id # at far right for easier visual parsing. */
4535         for (i = 0; i < num_events; i++) {
4536                 ev = iwl_read_restricted_mem(priv, ptr);
4537                 ptr += sizeof(u32);
4538                 time = iwl_read_restricted_mem(priv, ptr);
4539                 ptr += sizeof(u32);
4540                 if (mode == 0)
4541                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4542                 else {
4543                         data = iwl_read_restricted_mem(priv, ptr);
4544                         ptr += sizeof(u32);
4545                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4546                 }
4547         }
4548 }
4549
4550 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4551 {
4552         int rc;
4553         u32 base;       /* SRAM byte address of event log header */
4554         u32 capacity;   /* event log capacity in # entries */
4555         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4556         u32 num_wraps;  /* # times uCode wrapped to top of log */
4557         u32 next_entry; /* index of next entry to be written by uCode */
4558         u32 size;       /* # entries that we'll print */
4559
4560         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4561         if (!iwl_hw_valid_rtc_data_addr(base)) {
4562                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4563                 return;
4564         }
4565
4566         rc = iwl_grab_restricted_access(priv);
4567         if (rc) {
4568                 IWL_WARNING("Can not read from adapter at this time.\n");
4569                 return;
4570         }
4571
4572         /* event log header */
4573         capacity = iwl_read_restricted_mem(priv, base);
4574         mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4575         num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4576         next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4577
4578         size = num_wraps ? capacity : next_entry;
4579
4580         /* bail out if nothing in log */
4581         if (size == 0) {
4582                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4583                 iwl_release_restricted_access(priv);
4584                 return;
4585         }
4586
4587         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4588                   size, num_wraps);
4589
4590         /* if uCode has wrapped back to top of log, start at the oldest entry,
4591          * i.e the next one that uCode would fill. */
4592         if (num_wraps)
4593                 iwl_print_event_log(priv, next_entry,
4594                                     capacity - next_entry, mode);
4595
4596         /* (then/else) start at top of log */
4597         iwl_print_event_log(priv, 0, next_entry, mode);
4598
4599         iwl_release_restricted_access(priv);
4600 }
4601
4602 /**
4603  * iwl_irq_handle_error - called for HW or SW error interrupt from card
4604  */
4605 static void iwl_irq_handle_error(struct iwl_priv *priv)
4606 {
4607         /* Set the FW error flag -- cleared on iwl_down */
4608         set_bit(STATUS_FW_ERROR, &priv->status);
4609
4610         /* Cancel currently queued command. */
4611         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4612
4613 #ifdef CONFIG_IWLWIFI_DEBUG
4614         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4615                 iwl_dump_nic_error_log(priv);
4616                 iwl_dump_nic_event_log(priv);
4617                 iwl_print_rx_config_cmd(&priv->staging_rxon);
4618         }
4619 #endif
4620
4621         wake_up_interruptible(&priv->wait_command_queue);
4622
4623         /* Keep the restart process from trying to send host
4624          * commands by clearing the INIT status bit */
4625         clear_bit(STATUS_READY, &priv->status);
4626
4627         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4628                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4629                           "Restarting adapter due to uCode error.\n");
4630
4631                 if (iwl_is_associated(priv)) {
4632                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4633                                sizeof(priv->recovery_rxon));
4634                         priv->error_recovering = 1;
4635                 }
4636                 queue_work(priv->workqueue, &priv->restart);
4637         }
4638 }
4639
4640 static void iwl_error_recovery(struct iwl_priv *priv)
4641 {
4642         unsigned long flags;
4643
4644         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4645                sizeof(priv->staging_rxon));
4646         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4647         iwl_commit_rxon(priv);
4648
4649         iwl_add_station(priv, priv->bssid, 1, 0);
4650
4651         spin_lock_irqsave(&priv->lock, flags);
4652         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4653         priv->error_recovering = 0;
4654         spin_unlock_irqrestore(&priv->lock, flags);
4655 }
4656
4657 static void iwl_irq_tasklet(struct iwl_priv *priv)
4658 {
4659         u32 inta, handled = 0;
4660         u32 inta_fh;
4661         unsigned long flags;
4662 #ifdef CONFIG_IWLWIFI_DEBUG
4663         u32 inta_mask;
4664 #endif
4665
4666         spin_lock_irqsave(&priv->lock, flags);
4667
4668         /* Ack/clear/reset pending uCode interrupts.
4669          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4670          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4671         inta = iwl_read32(priv, CSR_INT);
4672         iwl_write32(priv, CSR_INT, inta);
4673
4674         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4675          * Any new interrupts that happen after this, either while we're
4676          * in this tasklet, or later, will show up in next ISR/tasklet. */
4677         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4678         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4679
4680 #ifdef CONFIG_IWLWIFI_DEBUG
4681         if (iwl_debug_level & IWL_DL_ISR) {
4682                 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4683                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4684                               inta, inta_mask, inta_fh);
4685         }
4686 #endif
4687
4688         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4689          * atomic, make sure that inta covers all the interrupts that
4690          * we've discovered, even if FH interrupt came in just after
4691          * reading CSR_INT. */
4692         if (inta_fh & CSR_FH_INT_RX_MASK)
4693                 inta |= CSR_INT_BIT_FH_RX;
4694         if (inta_fh & CSR_FH_INT_TX_MASK)
4695                 inta |= CSR_INT_BIT_FH_TX;
4696
4697         /* Now service all interrupt bits discovered above. */
4698         if (inta & CSR_INT_BIT_HW_ERR) {
4699                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4700
4701                 /* Tell the device to stop sending interrupts */
4702                 iwl_disable_interrupts(priv);
4703
4704                 iwl_irq_handle_error(priv);
4705
4706                 handled |= CSR_INT_BIT_HW_ERR;
4707
4708                 spin_unlock_irqrestore(&priv->lock, flags);
4709
4710                 return;
4711         }
4712
4713 #ifdef CONFIG_IWLWIFI_DEBUG
4714         if (iwl_debug_level & (IWL_DL_ISR)) {
4715                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4716                 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
4717                         IWL_DEBUG_ISR("Microcode started or stopped.\n");
4718
4719                 /* Alive notification via Rx interrupt will do the real work */
4720                 if (inta & CSR_INT_BIT_ALIVE)
4721                         IWL_DEBUG_ISR("Alive interrupt\n");
4722         }
4723 #endif
4724         /* Safely ignore these bits for debug checks below */
4725         inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
4726
4727         /* HW RF KILL switch toggled (4965 only) */
4728         if (inta & CSR_INT_BIT_RF_KILL) {
4729                 int hw_rf_kill = 0;
4730                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4731                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4732                         hw_rf_kill = 1;
4733
4734                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4735                                 "RF_KILL bit toggled to %s.\n",
4736                                 hw_rf_kill ? "disable radio":"enable radio");
4737
4738                 /* Queue restart only if RF_KILL switch was set to "kill"
4739                  *   when we loaded driver, and is now set to "enable".
4740                  * After we're Alive, RF_KILL gets handled by
4741                  *   iwl_rx_card_state_notif() */
4742                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
4743                         queue_work(priv->workqueue, &priv->restart);
4744
4745                 handled |= CSR_INT_BIT_RF_KILL;
4746         }
4747
4748         /* Chip got too hot and stopped itself (4965 only) */
4749         if (inta & CSR_INT_BIT_CT_KILL) {
4750                 IWL_ERROR("Microcode CT kill error detected.\n");
4751                 handled |= CSR_INT_BIT_CT_KILL;
4752         }
4753
4754         /* Error detected by uCode */
4755         if (inta & CSR_INT_BIT_SW_ERR) {
4756                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4757                           inta);
4758                 iwl_irq_handle_error(priv);
4759                 handled |= CSR_INT_BIT_SW_ERR;
4760         }
4761
4762         /* uCode wakes up after power-down sleep */
4763         if (inta & CSR_INT_BIT_WAKEUP) {
4764                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4765                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
4766                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4767                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4768                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4769                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4770                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4771                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4772
4773                 handled |= CSR_INT_BIT_WAKEUP;
4774         }
4775
4776         /* All uCode command responses, including Tx command responses,
4777          * Rx "responses" (frame-received notification), and other
4778          * notifications from uCode come through here*/
4779         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4780                 iwl_rx_handle(priv);
4781                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4782         }
4783
4784         if (inta & CSR_INT_BIT_FH_TX) {
4785                 IWL_DEBUG_ISR("Tx interrupt\n");
4786
4787                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4788                 if (!iwl_grab_restricted_access(priv)) {
4789                         iwl_write_restricted(priv,
4790                                              FH_TCSR_CREDIT
4791                                              (ALM_FH_SRVC_CHNL), 0x0);
4792                         iwl_release_restricted_access(priv);
4793                 }
4794                 handled |= CSR_INT_BIT_FH_TX;
4795         }
4796
4797         if (inta & ~handled)
4798                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4799
4800         if (inta & ~CSR_INI_SET_MASK) {
4801                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4802                          inta & ~CSR_INI_SET_MASK);
4803                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4804         }
4805
4806         /* Re-enable all interrupts */
4807         iwl_enable_interrupts(priv);
4808
4809 #ifdef CONFIG_IWLWIFI_DEBUG
4810         if (iwl_debug_level & (IWL_DL_ISR)) {
4811                 inta = iwl_read32(priv, CSR_INT);
4812                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4813                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4814                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4815                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4816         }
4817 #endif
4818         spin_unlock_irqrestore(&priv->lock, flags);
4819 }
4820
4821 static irqreturn_t iwl_isr(int irq, void *data)
4822 {
4823         struct iwl_priv *priv = data;
4824         u32 inta, inta_mask;
4825         u32 inta_fh;
4826         if (!priv)
4827                 return IRQ_NONE;
4828
4829         spin_lock(&priv->lock);
4830
4831         /* Disable (but don't clear!) interrupts here to avoid
4832          *    back-to-back ISRs and sporadic interrupts from our NIC.
4833          * If we have something to service, the tasklet will re-enable ints.
4834          * If we *don't* have something, we'll re-enable before leaving here. */
4835         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
4836         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4837
4838         /* Discover which interrupts are active/pending */
4839         inta = iwl_read32(priv, CSR_INT);
4840         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4841
4842         /* Ignore interrupt if there's nothing in NIC to service.
4843          * This may be due to IRQ shared with another device,
4844          * or due to sporadic interrupts thrown from our NIC. */
4845         if (!inta && !inta_fh) {
4846                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4847                 goto none;
4848         }
4849
4850         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4851                 /* Hardware disappeared */
4852                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4853                 goto none;
4854         }
4855
4856         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4857                       inta, inta_mask, inta_fh);
4858
4859         /* iwl_irq_tasklet() will service interrupts and re-enable them */
4860         tasklet_schedule(&priv->irq_tasklet);
4861         spin_unlock(&priv->lock);
4862
4863         return IRQ_HANDLED;
4864
4865  none:
4866         /* re-enable interrupts here since we don't have anything to service. */
4867         iwl_enable_interrupts(priv);
4868         spin_unlock(&priv->lock);
4869         return IRQ_NONE;
4870 }
4871
4872 /************************** EEPROM BANDS ****************************
4873  *
4874  * The iwl_eeprom_band definitions below provide the mapping from the
4875  * EEPROM contents to the specific channel number supported for each
4876  * band.
4877  *
4878  * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
4879  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4880  * The specific geography and calibration information for that channel
4881  * is contained in the eeprom map itself.
4882  *
4883  * During init, we copy the eeprom information and channel map
4884  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4885  *
4886  * channel_map_24/52 provides the index in the channel_info array for a
4887  * given channel.  We have to have two separate maps as there is channel
4888  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4889  * band_2
4890  *
4891  * A value of 0xff stored in the channel_map indicates that the channel
4892  * is not supported by the hardware at all.
4893  *
4894  * A value of 0xfe in the channel_map indicates that the channel is not
4895  * valid for Tx with the current hardware.  This means that
4896  * while the system can tune and receive on a given channel, it may not
4897  * be able to associate or transmit any frames on that
4898  * channel.  There is no corresponding channel information for that
4899  * entry.
4900  *
4901  *********************************************************************/
4902
4903 /* 2.4 GHz */
4904 static const u8 iwl_eeprom_band_1[14] = {
4905         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4906 };
4907
4908 /* 5.2 GHz bands */
4909 static const u8 iwl_eeprom_band_2[] = {
4910         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4911 };
4912
4913 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
4914         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4915 };
4916
4917 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
4918         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4919 };
4920
4921 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
4922         145, 149, 153, 157, 161, 165
4923 };
4924
4925 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
4926                                     int *eeprom_ch_count,
4927                                     const struct iwl_eeprom_channel
4928                                     **eeprom_ch_info,
4929                                     const u8 **eeprom_ch_index)
4930 {
4931         switch (band) {
4932         case 1:         /* 2.4GHz band */
4933                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
4934                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4935                 *eeprom_ch_index = iwl_eeprom_band_1;
4936                 break;
4937         case 2:         /* 5.2GHz band */
4938                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
4939                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4940                 *eeprom_ch_index = iwl_eeprom_band_2;
4941                 break;
4942         case 3:         /* 5.2GHz band */
4943                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
4944                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4945                 *eeprom_ch_index = iwl_eeprom_band_3;
4946                 break;
4947         case 4:         /* 5.2GHz band */
4948                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
4949                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4950                 *eeprom_ch_index = iwl_eeprom_band_4;
4951                 break;
4952         case 5:         /* 5.2GHz band */
4953                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
4954                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4955                 *eeprom_ch_index = iwl_eeprom_band_5;
4956                 break;
4957         default:
4958                 BUG();
4959                 return;
4960         }
4961 }
4962
4963 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
4964                                                     int phymode, u16 channel)
4965 {
4966         int i;
4967
4968         switch (phymode) {
4969         case MODE_IEEE80211A:
4970                 for (i = 14; i < priv->channel_count; i++) {
4971                         if (priv->channel_info[i].channel == channel)
4972                                 return &priv->channel_info[i];
4973                 }
4974                 break;
4975
4976         case MODE_IEEE80211B:
4977         case MODE_IEEE80211G:
4978                 if (channel >= 1 && channel <= 14)
4979                         return &priv->channel_info[channel - 1];
4980                 break;
4981
4982         }
4983
4984         return NULL;
4985 }
4986
4987 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4988                             ? # x " " : "")
4989
4990 static int iwl_init_channel_map(struct iwl_priv *priv)
4991 {
4992         int eeprom_ch_count = 0;
4993         const u8 *eeprom_ch_index = NULL;
4994         const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
4995         int band, ch;
4996         struct iwl_channel_info *ch_info;
4997
4998         if (priv->channel_count) {
4999                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5000                 return 0;
5001         }
5002
5003         if (priv->eeprom.version < 0x2f) {
5004                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5005                             priv->eeprom.version);
5006                 return -EINVAL;
5007         }
5008
5009         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5010
5011         priv->channel_count =
5012             ARRAY_SIZE(iwl_eeprom_band_1) +
5013             ARRAY_SIZE(iwl_eeprom_band_2) +
5014             ARRAY_SIZE(iwl_eeprom_band_3) +
5015             ARRAY_SIZE(iwl_eeprom_band_4) +
5016             ARRAY_SIZE(iwl_eeprom_band_5);
5017
5018         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5019
5020         priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5021                                      priv->channel_count, GFP_KERNEL);
5022         if (!priv->channel_info) {
5023                 IWL_ERROR("Could not allocate channel_info\n");
5024                 priv->channel_count = 0;
5025                 return -ENOMEM;
5026         }
5027
5028         ch_info = priv->channel_info;
5029
5030         /* Loop through the 5 EEPROM bands adding them in order to the
5031          * channel map we maintain (that contains additional information than
5032          * what just in the EEPROM) */
5033         for (band = 1; band <= 5; band++) {
5034
5035                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5036                                         &eeprom_ch_info, &eeprom_ch_index);
5037
5038                 /* Loop through each band adding each of the channels */
5039                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5040                         ch_info->channel = eeprom_ch_index[ch];
5041                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5042                             MODE_IEEE80211A;
5043
5044                         /* permanently store EEPROM's channel regulatory flags
5045                          *   and max power in channel info database. */
5046                         ch_info->eeprom = eeprom_ch_info[ch];
5047
5048                         /* Copy the run-time flags so they are there even on
5049                          * invalid channels */
5050                         ch_info->flags = eeprom_ch_info[ch].flags;
5051
5052                         if (!(is_channel_valid(ch_info))) {
5053                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5054                                                "No traffic\n",
5055                                                ch_info->channel,
5056                                                ch_info->flags,
5057                                                is_channel_a_band(ch_info) ?
5058                                                "5.2" : "2.4");
5059                                 ch_info++;
5060                                 continue;
5061                         }
5062
5063                         /* Initialize regulatory-based run-time data */
5064                         ch_info->max_power_avg = ch_info->curr_txpow =
5065                             eeprom_ch_info[ch].max_power_avg;
5066                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5067                         ch_info->min_power = 0;
5068
5069                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5070                                        " %ddBm): Ad-Hoc %ssupported\n",
5071                                        ch_info->channel,
5072                                        is_channel_a_band(ch_info) ?
5073                                        "5.2" : "2.4",
5074                                        CHECK_AND_PRINT(IBSS),
5075                                        CHECK_AND_PRINT(ACTIVE),
5076                                        CHECK_AND_PRINT(RADAR),
5077                                        CHECK_AND_PRINT(WIDE),
5078                                        CHECK_AND_PRINT(NARROW),
5079                                        CHECK_AND_PRINT(DFS),
5080                                        eeprom_ch_info[ch].flags,
5081                                        eeprom_ch_info[ch].max_power_avg,
5082                                        ((eeprom_ch_info[ch].
5083                                          flags & EEPROM_CHANNEL_IBSS)
5084                                         && !(eeprom_ch_info[ch].
5085                                              flags & EEPROM_CHANNEL_RADAR))
5086                                        ? "" : "not ");
5087
5088                         /* Set the user_txpower_limit to the highest power
5089                          * supported by any channel */
5090                         if (eeprom_ch_info[ch].max_power_avg >
5091                             priv->user_txpower_limit)
5092                                 priv->user_txpower_limit =
5093                                     eeprom_ch_info[ch].max_power_avg;
5094
5095                         ch_info++;
5096                 }
5097         }
5098
5099         if (iwl3945_txpower_set_from_eeprom(priv))
5100                 return -EIO;
5101
5102         return 0;
5103 }
5104
5105 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5106  * sending probe req.  This should be set long enough to hear probe responses
5107  * from more than one AP.  */
5108 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5109 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5110
5111 /* For faster active scanning, scan will move to the next channel if fewer than
5112  * PLCP_QUIET_THRESH packets are heard on this channel within
5113  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5114  * time if it's a quiet channel (nothing responded to our probe, and there's
5115  * no other traffic).
5116  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5117 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5118 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5119
5120 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5121  * Must be set longer than active dwell time.
5122  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5123 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5124 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5125 #define IWL_PASSIVE_DWELL_BASE      (100)
5126 #define IWL_CHANNEL_TUNE_TIME       5
5127
5128 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5129 {
5130         if (phymode == MODE_IEEE80211A)
5131                 return IWL_ACTIVE_DWELL_TIME_52;
5132         else
5133                 return IWL_ACTIVE_DWELL_TIME_24;
5134 }
5135
5136 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5137 {
5138         u16 active = iwl_get_active_dwell_time(priv, phymode);
5139         u16 passive = (phymode != MODE_IEEE80211A) ?
5140             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5141             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5142
5143         if (iwl_is_associated(priv)) {
5144                 /* If we're associated, we clamp the maximum passive
5145                  * dwell time to be 98% of the beacon interval (minus
5146                  * 2 * channel tune time) */
5147                 passive = priv->beacon_int;
5148                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5149                         passive = IWL_PASSIVE_DWELL_BASE;
5150                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5151         }
5152
5153         if (passive <= active)
5154                 passive = active + 1;
5155
5156         return passive;
5157 }
5158
5159 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5160                                      u8 is_active, u8 direct_mask,
5161                                      struct iwl_scan_channel *scan_ch)
5162 {
5163         const struct ieee80211_channel *channels = NULL;
5164         const struct ieee80211_hw_mode *hw_mode;
5165         const struct iwl_channel_info *ch_info;
5166         u16 passive_dwell = 0;
5167         u16 active_dwell = 0;
5168         int added, i;
5169
5170         hw_mode = iwl_get_hw_mode(priv, phymode);
5171         if (!hw_mode)
5172                 return 0;
5173
5174         channels = hw_mode->channels;
5175
5176         active_dwell = iwl_get_active_dwell_time(priv, phymode);
5177         passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5178
5179         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5180                 if (channels[i].chan ==
5181                     le16_to_cpu(priv->active_rxon.channel)) {
5182                         if (iwl_is_associated(priv)) {
5183                                 IWL_DEBUG_SCAN
5184                                     ("Skipping current channel %d\n",
5185                                      le16_to_cpu(priv->active_rxon.channel));
5186                                 continue;
5187                         }
5188                 } else if (priv->only_active_channel)
5189                         continue;
5190
5191                 scan_ch->channel = channels[i].chan;
5192
5193                 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5194                 if (!is_channel_valid(ch_info)) {
5195                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5196                                        scan_ch->channel);
5197                         continue;
5198                 }
5199
5200                 if (!is_active || is_channel_passive(ch_info) ||
5201                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5202                         scan_ch->type = 0;      /* passive */
5203                 else
5204                         scan_ch->type = 1;      /* active */
5205
5206                 if (scan_ch->type & 1)
5207                         scan_ch->type |= (direct_mask << 1);
5208
5209                 if (is_channel_narrow(ch_info))
5210                         scan_ch->type |= (1 << 7);
5211
5212                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5213                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5214
5215                 /* Set power levels to defaults */
5216                 scan_ch->tpc.dsp_atten = 110;
5217                 /* scan_pwr_info->tpc.dsp_atten; */
5218
5219                 /*scan_pwr_info->tpc.tx_gain; */
5220                 if (phymode == MODE_IEEE80211A)
5221                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5222                 else {
5223                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5224                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5225                          * power level
5226                          scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5227                          */
5228                 }
5229
5230                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5231                                scan_ch->channel,
5232                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5233                                (scan_ch->type & 1) ?
5234                                active_dwell : passive_dwell);
5235
5236                 scan_ch++;
5237                 added++;
5238         }
5239
5240         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5241         return added;
5242 }
5243
5244 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5245 {
5246         int i, j;
5247         for (i = 0; i < 3; i++) {
5248                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5249                 for (j = 0; j < hw_mode->num_channels; j++)
5250                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5251         }
5252 }
5253
5254 static void iwl_init_hw_rates(struct iwl_priv *priv,
5255                               struct ieee80211_rate *rates)
5256 {
5257         int i;
5258
5259         for (i = 0; i < IWL_RATE_COUNT; i++) {
5260                 rates[i].rate = iwl_rates[i].ieee * 5;
5261                 rates[i].val = i; /* Rate scaling will work on indexes */
5262                 rates[i].val2 = i;
5263                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5264                 /* Only OFDM have the bits-per-symbol set */
5265                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5266                         rates[i].flags |= IEEE80211_RATE_OFDM;
5267                 else {
5268                         /*
5269                          * If CCK 1M then set rate flag to CCK else CCK_2
5270                          * which is CCK | PREAMBLE2
5271                          */
5272                         rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5273                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5274                 }
5275
5276                 /* Set up which ones are basic rates... */
5277                 if (IWL_BASIC_RATES_MASK & (1 << i))
5278                         rates[i].flags |= IEEE80211_RATE_BASIC;
5279         }
5280 }
5281
5282 /**
5283  * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5284  */
5285 static int iwl_init_geos(struct iwl_priv *priv)
5286 {
5287         struct iwl_channel_info *ch;
5288         struct ieee80211_hw_mode *modes;
5289         struct ieee80211_channel *channels;
5290         struct ieee80211_channel *geo_ch;
5291         struct ieee80211_rate *rates;
5292         int i = 0;
5293         enum {
5294                 A = 0,
5295                 B = 1,
5296                 G = 2,
5297         };
5298         int mode_count = 3;
5299
5300         if (priv->modes) {
5301                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5302                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5303                 return 0;
5304         }
5305
5306         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5307                         GFP_KERNEL);
5308         if (!modes)
5309                 return -ENOMEM;
5310
5311         channels = kzalloc(sizeof(struct ieee80211_channel) *
5312                            priv->channel_count, GFP_KERNEL);
5313         if (!channels) {
5314                 kfree(modes);
5315                 return -ENOMEM;
5316         }
5317
5318         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5319                         GFP_KERNEL);
5320         if (!rates) {
5321                 kfree(modes);
5322                 kfree(channels);
5323                 return -ENOMEM;
5324         }
5325
5326         /* 0 = 802.11a
5327          * 1 = 802.11b
5328          * 2 = 802.11g
5329          */
5330
5331         /* 5.2GHz channels start after the 2.4GHz channels */
5332         modes[A].mode = MODE_IEEE80211A;
5333         modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5334         modes[A].rates = rates;
5335         modes[A].num_rates = 8; /* just OFDM */
5336         modes[A].num_channels = 0;
5337
5338         modes[B].mode = MODE_IEEE80211B;
5339         modes[B].channels = channels;
5340         modes[B].rates = &rates[8];
5341         modes[B].num_rates = 4; /* just CCK */
5342         modes[B].num_channels = 0;
5343
5344         modes[G].mode = MODE_IEEE80211G;
5345         modes[G].channels = channels;
5346         modes[G].rates = rates;
5347         modes[G].num_rates = 12;        /* OFDM & CCK */
5348         modes[G].num_channels = 0;
5349
5350         priv->ieee_channels = channels;
5351         priv->ieee_rates = rates;
5352
5353         iwl_init_hw_rates(priv, rates);
5354
5355         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5356                 ch = &priv->channel_info[i];
5357
5358                 if (!is_channel_valid(ch)) {
5359                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5360                                     "skipping.\n",
5361                                     ch->channel, is_channel_a_band(ch) ?
5362                                     "5.2" : "2.4");
5363                         continue;
5364                 }
5365
5366                 if (is_channel_a_band(ch))
5367                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5368                 else {
5369                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5370                         modes[G].num_channels++;
5371                 }
5372
5373                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5374                 geo_ch->chan = ch->channel;
5375                 geo_ch->power_level = ch->max_power_avg;
5376                 geo_ch->antenna_max = 0xff;
5377
5378                 if (is_channel_valid(ch)) {
5379                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5380                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5381                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5382
5383                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5384                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5385
5386                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5387                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5388
5389                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5390                                 priv->max_channel_txpower_limit =
5391                                     ch->max_power_avg;
5392                 }
5393
5394                 geo_ch->val = geo_ch->flag;
5395         }
5396
5397         if ((modes[A].num_channels == 0) && priv->is_abg) {
5398                 printk(KERN_INFO DRV_NAME
5399                        ": Incorrectly detected BG card as ABG.  Please send "
5400                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5401                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5402                 priv->is_abg = 0;
5403         }
5404
5405         printk(KERN_INFO DRV_NAME
5406                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5407                modes[G].num_channels, modes[A].num_channels);
5408
5409         /*
5410          * NOTE:  We register these in preference of order -- the
5411          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5412          * a phymode based on rates or AP capabilities but seems to
5413          * configure it purely on if the channel being configured
5414          * is supported by a mode -- and the first match is taken
5415          */
5416
5417         if (modes[G].num_channels)
5418                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5419         if (modes[B].num_channels)
5420                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5421         if (modes[A].num_channels)
5422                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5423
5424         priv->modes = modes;
5425         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5426
5427         return 0;
5428 }
5429
5430 /******************************************************************************
5431  *
5432  * uCode download functions
5433  *
5434  ******************************************************************************/
5435
5436 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5437 {
5438         if (priv->ucode_code.v_addr != NULL) {
5439                 pci_free_consistent(priv->pci_dev,
5440                                     priv->ucode_code.len,
5441                                     priv->ucode_code.v_addr,
5442                                     priv->ucode_code.p_addr);
5443                 priv->ucode_code.v_addr = NULL;
5444         }
5445         if (priv->ucode_data.v_addr != NULL) {
5446                 pci_free_consistent(priv->pci_dev,
5447                                     priv->ucode_data.len,
5448                                     priv->ucode_data.v_addr,
5449                                     priv->ucode_data.p_addr);
5450                 priv->ucode_data.v_addr = NULL;
5451         }
5452         if (priv->ucode_data_backup.v_addr != NULL) {
5453                 pci_free_consistent(priv->pci_dev,
5454                                     priv->ucode_data_backup.len,
5455                                     priv->ucode_data_backup.v_addr,
5456                                     priv->ucode_data_backup.p_addr);
5457                 priv->ucode_data_backup.v_addr = NULL;
5458         }
5459         if (priv->ucode_init.v_addr != NULL) {
5460                 pci_free_consistent(priv->pci_dev,
5461                                     priv->ucode_init.len,
5462                                     priv->ucode_init.v_addr,
5463                                     priv->ucode_init.p_addr);
5464                 priv->ucode_init.v_addr = NULL;
5465         }
5466         if (priv->ucode_init_data.v_addr != NULL) {
5467                 pci_free_consistent(priv->pci_dev,
5468                                     priv->ucode_init_data.len,
5469                                     priv->ucode_init_data.v_addr,
5470                                     priv->ucode_init_data.p_addr);
5471                 priv->ucode_init_data.v_addr = NULL;
5472         }
5473         if (priv->ucode_boot.v_addr != NULL) {
5474                 pci_free_consistent(priv->pci_dev,
5475                                     priv->ucode_boot.len,
5476                                     priv->ucode_boot.v_addr,
5477                                     priv->ucode_boot.p_addr);
5478                 priv->ucode_boot.v_addr = NULL;
5479         }
5480 }
5481
5482 /**
5483  * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5484  *     looking at all data.
5485  */
5486 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5487 {
5488         u32 val;
5489         u32 save_len = len;
5490         int rc = 0;
5491         u32 errcnt;
5492
5493         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5494
5495         rc = iwl_grab_restricted_access(priv);
5496         if (rc)
5497                 return rc;
5498
5499         iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5500
5501         errcnt = 0;
5502         for (; len > 0; len -= sizeof(u32), image++) {
5503                 /* read data comes through single port, auto-incr addr */
5504                 /* NOTE: Use the debugless read so we don't flood kernel log
5505                  * if IWL_DL_IO is set */
5506                 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5507                 if (val != le32_to_cpu(*image)) {
5508                         IWL_ERROR("uCode INST section is invalid at "
5509                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5510                                   save_len - len, val, le32_to_cpu(*image));
5511                         rc = -EIO;
5512                         errcnt++;
5513                         if (errcnt >= 20)
5514                                 break;
5515                 }
5516         }
5517
5518         iwl_release_restricted_access(priv);
5519
5520         if (!errcnt)
5521                 IWL_DEBUG_INFO
5522                     ("ucode image in INSTRUCTION memory is good\n");
5523
5524         return rc;
5525 }
5526
5527
5528 /**
5529  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5530  *   using sample data 100 bytes apart.  If these sample points are good,
5531  *   it's a pretty good bet that everything between them is good, too.
5532  */
5533 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5534 {
5535         u32 val;
5536         int rc = 0;
5537         u32 errcnt = 0;
5538         u32 i;
5539
5540         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5541
5542         rc = iwl_grab_restricted_access(priv);
5543         if (rc)
5544                 return rc;
5545
5546         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5547                 /* read data comes through single port, auto-incr addr */
5548                 /* NOTE: Use the debugless read so we don't flood kernel log
5549                  * if IWL_DL_IO is set */
5550                 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5551                         i + RTC_INST_LOWER_BOUND);
5552                 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5553                 if (val != le32_to_cpu(*image)) {
5554 #if 0 /* Enable this if you want to see details */
5555                         IWL_ERROR("uCode INST section is invalid at "
5556                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5557                                   i, val, *image);
5558 #endif
5559                         rc = -EIO;
5560                         errcnt++;
5561                         if (errcnt >= 3)
5562                                 break;
5563                 }
5564         }
5565
5566         iwl_release_restricted_access(priv);
5567
5568         return rc;
5569 }
5570
5571
5572 /**
5573  * iwl_verify_ucode - determine which instruction image is in SRAM,
5574  *    and verify its contents
5575  */
5576 static int iwl_verify_ucode(struct iwl_priv *priv)
5577 {
5578         __le32 *image;
5579         u32 len;
5580         int rc = 0;
5581
5582         /* Try bootstrap */
5583         image = (__le32 *)priv->ucode_boot.v_addr;
5584         len = priv->ucode_boot.len;
5585         rc = iwl_verify_inst_sparse(priv, image, len);
5586         if (rc == 0) {
5587                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5588                 return 0;
5589         }
5590
5591         /* Try initialize */
5592         image = (__le32 *)priv->ucode_init.v_addr;
5593         len = priv->ucode_init.len;
5594         rc = iwl_verify_inst_sparse(priv, image, len);
5595         if (rc == 0) {
5596                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5597                 return 0;
5598         }
5599
5600         /* Try runtime/protocol */
5601         image = (__le32 *)priv->ucode_code.v_addr;
5602         len = priv->ucode_code.len;
5603         rc = iwl_verify_inst_sparse(priv, image, len);
5604         if (rc == 0) {
5605                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5606                 return 0;
5607         }
5608
5609         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5610
5611         /* Show first several data entries in instruction SRAM.
5612          * Selection of bootstrap image is arbitrary. */
5613         image = (__le32 *)priv->ucode_boot.v_addr;
5614         len = priv->ucode_boot.len;
5615         rc = iwl_verify_inst_full(priv, image, len);
5616
5617         return rc;
5618 }
5619
5620
5621 /* check contents of special bootstrap uCode SRAM */
5622 static int iwl_verify_bsm(struct iwl_priv *priv)
5623 {
5624         __le32 *image = priv->ucode_boot.v_addr;
5625         u32 len = priv->ucode_boot.len;
5626         u32 reg;
5627         u32 val;
5628
5629         IWL_DEBUG_INFO("Begin verify bsm\n");
5630
5631         /* verify BSM SRAM contents */
5632         val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
5633         for (reg = BSM_SRAM_LOWER_BOUND;
5634              reg < BSM_SRAM_LOWER_BOUND + len;
5635              reg += sizeof(u32), image ++) {
5636                 val = iwl_read_restricted_reg(priv, reg);
5637                 if (val != le32_to_cpu(*image)) {
5638                         IWL_ERROR("BSM uCode verification failed at "
5639                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5640                                   BSM_SRAM_LOWER_BOUND,
5641                                   reg - BSM_SRAM_LOWER_BOUND, len,
5642                                   val, le32_to_cpu(*image));
5643                         return -EIO;
5644                 }
5645         }
5646
5647         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5648
5649         return 0;
5650 }
5651
5652 /**
5653  * iwl_load_bsm - Load bootstrap instructions
5654  *
5655  * BSM operation:
5656  *
5657  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5658  * in special SRAM that does not power down during RFKILL.  When powering back
5659  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5660  * the bootstrap program into the on-board processor, and starts it.
5661  *
5662  * The bootstrap program loads (via DMA) instructions and data for a new
5663  * program from host DRAM locations indicated by the host driver in the
5664  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5665  * automatically.
5666  *
5667  * When initializing the NIC, the host driver points the BSM to the
5668  * "initialize" uCode image.  This uCode sets up some internal data, then
5669  * notifies host via "initialize alive" that it is complete.
5670  *
5671  * The host then replaces the BSM_DRAM_* pointer values to point to the
5672  * normal runtime uCode instructions and a backup uCode data cache buffer
5673  * (filled initially with starting data values for the on-board processor),
5674  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5675  * which begins normal operation.
5676  *
5677  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5678  * the backup data cache in DRAM before SRAM is powered down.
5679  *
5680  * When powering back up, the BSM loads the bootstrap program.  This reloads
5681  * the runtime uCode instructions and the backup data cache into SRAM,
5682  * and re-launches the runtime uCode from where it left off.
5683  */
5684 static int iwl_load_bsm(struct iwl_priv *priv)
5685 {
5686         __le32 *image = priv->ucode_boot.v_addr;
5687         u32 len = priv->ucode_boot.len;
5688         dma_addr_t pinst;
5689         dma_addr_t pdata;
5690         u32 inst_len;
5691         u32 data_len;
5692         int rc;
5693         int i;
5694         u32 done;
5695         u32 reg_offset;
5696
5697         IWL_DEBUG_INFO("Begin load bsm\n");
5698
5699         /* make sure bootstrap program is no larger than BSM's SRAM size */
5700         if (len > IWL_MAX_BSM_SIZE)
5701                 return -EINVAL;
5702
5703         /* Tell bootstrap uCode where to find the "Initialize" uCode
5704          *   in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
5705          * NOTE:  iwl_initialize_alive_start() will replace these values,
5706          *        after the "initialize" uCode has run, to point to
5707          *        runtime/protocol instructions and backup data cache. */
5708         pinst = priv->ucode_init.p_addr;
5709         pdata = priv->ucode_init_data.p_addr;
5710         inst_len = priv->ucode_init.len;
5711         data_len = priv->ucode_init_data.len;
5712
5713         rc = iwl_grab_restricted_access(priv);
5714         if (rc)
5715                 return rc;
5716
5717         iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
5718         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5719         iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5720         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5721
5722         /* Fill BSM memory with bootstrap instructions */
5723         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5724              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5725              reg_offset += sizeof(u32), image++)
5726                 _iwl_write_restricted_reg(priv, reg_offset,
5727                                           le32_to_cpu(*image));
5728
5729         rc = iwl_verify_bsm(priv);
5730         if (rc) {
5731                 iwl_release_restricted_access(priv);
5732                 return rc;
5733         }
5734
5735         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5736         iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
5737         iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
5738                                  RTC_INST_LOWER_BOUND);
5739         iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5740
5741         /* Load bootstrap code into instruction SRAM now,
5742          *   to prepare to load "initialize" uCode */
5743         iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5744                 BSM_WR_CTRL_REG_BIT_START);
5745
5746         /* Wait for load of bootstrap uCode to finish */
5747         for (i = 0; i < 100; i++) {
5748                 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
5749                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5750                         break;
5751                 udelay(10);
5752         }
5753         if (i < 100)
5754                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5755         else {
5756                 IWL_ERROR("BSM write did not complete!\n");
5757                 return -EIO;
5758         }
5759
5760         /* Enable future boot loads whenever power management unit triggers it
5761          *   (e.g. when powering back up after power-save shutdown) */
5762         iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5763                 BSM_WR_CTRL_REG_BIT_START_EN);
5764
5765         iwl_release_restricted_access(priv);
5766
5767         return 0;
5768 }
5769
5770 static void iwl_nic_start(struct iwl_priv *priv)
5771 {
5772         /* Remove all resets to allow NIC to operate */
5773         iwl_write32(priv, CSR_RESET, 0);
5774 }
5775
5776 /**
5777  * iwl_read_ucode - Read uCode images from disk file.
5778  *
5779  * Copy into buffers for card to fetch via bus-mastering
5780  */
5781 static int iwl_read_ucode(struct iwl_priv *priv)
5782 {
5783         struct iwl_ucode *ucode;
5784         int rc = 0;
5785         const struct firmware *ucode_raw;
5786         /* firmware file name contains uCode/driver compatibility version */
5787         const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
5788         u8 *src;
5789         size_t len;
5790         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5791
5792         /* Ask kernel firmware_class module to get the boot firmware off disk.
5793          * request_firmware() is synchronous, file is in memory on return. */
5794         rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5795         if (rc < 0) {
5796                 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
5797                 goto error;
5798         }
5799
5800         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5801                        name, ucode_raw->size);
5802
5803         /* Make sure that we got at least our header! */
5804         if (ucode_raw->size < sizeof(*ucode)) {
5805                 IWL_ERROR("File size way too small!\n");
5806                 rc = -EINVAL;
5807                 goto err_release;
5808         }
5809
5810         /* Data from ucode file:  header followed by uCode images */
5811         ucode = (void *)ucode_raw->data;
5812
5813         ver = le32_to_cpu(ucode->ver);
5814         inst_size = le32_to_cpu(ucode->inst_size);
5815         data_size = le32_to_cpu(ucode->data_size);
5816         init_size = le32_to_cpu(ucode->init_size);
5817         init_data_size = le32_to_cpu(ucode->init_data_size);
5818         boot_size = le32_to_cpu(ucode->boot_size);
5819
5820         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5821         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5822                        inst_size);
5823         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5824                        data_size);
5825         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5826                        init_size);
5827         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5828                        init_data_size);
5829         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5830                        boot_size);
5831
5832         /* Verify size of file vs. image size info in file's header */
5833         if (ucode_raw->size < sizeof(*ucode) +
5834                 inst_size + data_size + init_size +
5835                 init_data_size + boot_size) {
5836
5837                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5838                                (int)ucode_raw->size);
5839                 rc = -EINVAL;
5840                 goto err_release;
5841         }
5842
5843         /* Verify that uCode images will fit in card's SRAM */
5844         if (inst_size > IWL_MAX_INST_SIZE) {
5845                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
5846                                (int)inst_size);
5847                 rc = -EINVAL;
5848                 goto err_release;
5849         }
5850
5851         if (data_size > IWL_MAX_DATA_SIZE) {
5852                 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
5853                                (int)data_size);
5854                 rc = -EINVAL;
5855                 goto err_release;
5856         }
5857         if (init_size > IWL_MAX_INST_SIZE) {
5858                 IWL_DEBUG_INFO
5859                     ("uCode init instr len %d too large to fit in card\n",
5860                      (int)init_size);
5861                 rc = -EINVAL;
5862                 goto err_release;
5863         }
5864         if (init_data_size > IWL_MAX_DATA_SIZE) {
5865                 IWL_DEBUG_INFO
5866                     ("uCode init data len %d too large to fit in card\n",
5867                      (int)init_data_size);
5868                 rc = -EINVAL;
5869                 goto err_release;
5870         }
5871         if (boot_size > IWL_MAX_BSM_SIZE) {
5872                 IWL_DEBUG_INFO
5873                     ("uCode boot instr len %d too large to fit in bsm\n",
5874                      (int)boot_size);
5875                 rc = -EINVAL;
5876                 goto err_release;
5877         }
5878
5879         /* Allocate ucode buffers for card's bus-master loading ... */
5880
5881         /* Runtime instructions and 2 copies of data:
5882          * 1) unmodified from disk
5883          * 2) backup cache for save/restore during power-downs */
5884         priv->ucode_code.len = inst_size;
5885         priv->ucode_code.v_addr =
5886             pci_alloc_consistent(priv->pci_dev,
5887                                  priv->ucode_code.len,
5888                                  &(priv->ucode_code.p_addr));
5889
5890         priv->ucode_data.len = data_size;
5891         priv->ucode_data.v_addr =
5892             pci_alloc_consistent(priv->pci_dev,
5893                                  priv->ucode_data.len,
5894                                  &(priv->ucode_data.p_addr));
5895
5896         priv->ucode_data_backup.len = data_size;
5897         priv->ucode_data_backup.v_addr =
5898             pci_alloc_consistent(priv->pci_dev,
5899                                  priv->ucode_data_backup.len,
5900                                  &(priv->ucode_data_backup.p_addr));
5901
5902
5903         /* Initialization instructions and data */
5904         priv->ucode_init.len = init_size;
5905         priv->ucode_init.v_addr =
5906             pci_alloc_consistent(priv->pci_dev,
5907                                  priv->ucode_init.len,
5908                                  &(priv->ucode_init.p_addr));
5909
5910         priv->ucode_init_data.len = init_data_size;
5911         priv->ucode_init_data.v_addr =
5912             pci_alloc_consistent(priv->pci_dev,
5913                                  priv->ucode_init_data.len,
5914                                  &(priv->ucode_init_data.p_addr));
5915
5916         /* Bootstrap (instructions only, no data) */
5917         priv->ucode_boot.len = boot_size;
5918         priv->ucode_boot.v_addr =
5919             pci_alloc_consistent(priv->pci_dev,
5920                                  priv->ucode_boot.len,
5921                                  &(priv->ucode_boot.p_addr));
5922
5923         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5924             !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
5925             !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
5926                 goto err_pci_alloc;
5927
5928         /* Copy images into buffers for card's bus-master reads ... */
5929
5930         /* Runtime instructions (first block of data in file) */
5931         src = &ucode->data[0];
5932         len = priv->ucode_code.len;
5933         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
5934                        (int)len);
5935         memcpy(priv->ucode_code.v_addr, src, len);
5936         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5937                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5938
5939         /* Runtime data (2nd block)
5940          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
5941         src = &ucode->data[inst_size];
5942         len = priv->ucode_data.len;
5943         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
5944                        (int)len);
5945         memcpy(priv->ucode_data.v_addr, src, len);
5946         memcpy(priv->ucode_data_backup.v_addr, src, len);
5947
5948         /* Initialization instructions (3rd block) */
5949         if (init_size) {
5950                 src = &ucode->data[inst_size + data_size];
5951                 len = priv->ucode_init.len;
5952                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
5953                                (int)len);
5954                 memcpy(priv->ucode_init.v_addr, src, len);
5955         }
5956
5957         /* Initialization data (4th block) */
5958         if (init_data_size) {
5959                 src = &ucode->data[inst_size + data_size + init_size];
5960                 len = priv->ucode_init_data.len;
5961                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5962                                (int)len);
5963                 memcpy(priv->ucode_init_data.v_addr, src, len);
5964         }
5965
5966         /* Bootstrap instructions (5th block) */
5967         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5968         len = priv->ucode_boot.len;
5969         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5970                        (int)len);
5971         memcpy(priv->ucode_boot.v_addr, src, len);
5972
5973         /* We have our copies now, allow OS release its copies */
5974         release_firmware(ucode_raw);
5975         return 0;
5976
5977  err_pci_alloc:
5978         IWL_ERROR("failed to allocate pci memory\n");
5979         rc = -ENOMEM;
5980         iwl_dealloc_ucode_pci(priv);
5981
5982  err_release:
5983         release_firmware(ucode_raw);
5984
5985  error:
5986         return rc;
5987 }
5988
5989
5990 /**
5991  * iwl_set_ucode_ptrs - Set uCode address location
5992  *
5993  * Tell initialization uCode where to find runtime uCode.
5994  *
5995  * BSM registers initially contain pointers to initialization uCode.
5996  * We need to replace them to load runtime uCode inst and data,
5997  * and to save runtime data when powering down.
5998  */
5999 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
6000 {
6001         dma_addr_t pinst;
6002         dma_addr_t pdata;
6003         int rc = 0;
6004         unsigned long flags;
6005
6006         /* bits 31:0 for 3945 */
6007         pinst = priv->ucode_code.p_addr;
6008         pdata = priv->ucode_data_backup.p_addr;
6009
6010         spin_lock_irqsave(&priv->lock, flags);
6011         rc = iwl_grab_restricted_access(priv);
6012         if (rc) {
6013                 spin_unlock_irqrestore(&priv->lock, flags);
6014                 return rc;
6015         }
6016
6017         /* Tell bootstrap uCode where to find image to load */
6018         iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6019         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6020         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6021                                  priv->ucode_data.len);
6022
6023         /* Inst bytecount must be last to set up, bit 31 signals uCode
6024          *   that all new ptr/size info is in place */
6025         iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6026                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6027
6028         iwl_release_restricted_access(priv);
6029
6030         spin_unlock_irqrestore(&priv->lock, flags);
6031
6032         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6033
6034         return rc;
6035 }
6036
6037 /**
6038  * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
6039  *
6040  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6041  *
6042  * The 4965 "initialize" ALIVE reply contains calibration data for:
6043  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
6044  *   (3945 does not contain this data).
6045  *
6046  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6047 */
6048 static void iwl_init_alive_start(struct iwl_priv *priv)
6049 {
6050         /* Check alive response for "valid" sign from uCode */
6051         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6052                 /* We had an error bringing up the hardware, so take it
6053                  * all the way back down so we can try again */
6054                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6055                 goto restart;
6056         }
6057
6058         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6059          * This is a paranoid check, because we would not have gotten the
6060          * "initialize" alive if code weren't properly loaded.  */
6061         if (iwl_verify_ucode(priv)) {
6062                 /* Runtime instruction load was bad;
6063                  * take it all the way back down so we can try again */
6064                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6065                 goto restart;
6066         }
6067
6068         /* Send pointers to protocol/runtime uCode image ... init code will
6069          * load and launch runtime uCode, which will send us another "Alive"
6070          * notification. */
6071         IWL_DEBUG_INFO("Initialization Alive received.\n");
6072         if (iwl_set_ucode_ptrs(priv)) {
6073                 /* Runtime instruction load won't happen;
6074                  * take it all the way back down so we can try again */
6075                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6076                 goto restart;
6077         }
6078         return;
6079
6080  restart:
6081         queue_work(priv->workqueue, &priv->restart);
6082 }
6083
6084
6085 /**
6086  * iwl_alive_start - called after REPLY_ALIVE notification received
6087  *                   from protocol/runtime uCode (initialization uCode's
6088  *                   Alive gets handled by iwl_init_alive_start()).
6089  */
6090 static void iwl_alive_start(struct iwl_priv *priv)
6091 {
6092         int rc = 0;
6093         int thermal_spin = 0;
6094         u32 rfkill;
6095
6096         IWL_DEBUG_INFO("Runtime Alive received.\n");
6097
6098         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6099                 /* We had an error bringing up the hardware, so take it
6100                  * all the way back down so we can try again */
6101                 IWL_DEBUG_INFO("Alive failed.\n");
6102                 goto restart;
6103         }
6104
6105         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6106          * This is a paranoid check, because we would not have gotten the
6107          * "runtime" alive if code weren't properly loaded.  */
6108         if (iwl_verify_ucode(priv)) {
6109                 /* Runtime instruction load was bad;
6110                  * take it all the way back down so we can try again */
6111                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6112                 goto restart;
6113         }
6114
6115         iwl_clear_stations_table(priv);
6116
6117         rc = iwl_grab_restricted_access(priv);
6118         if (rc) {
6119                 IWL_WARNING("Can not read rfkill status from adapter\n");
6120                 return;
6121         }
6122
6123         rfkill = iwl_read_restricted_reg(priv, APMG_RFKILL_REG);
6124         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
6125         iwl_release_restricted_access(priv);
6126
6127         if (rfkill & 0x1) {
6128                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6129                 /* if rfkill is not on, then wait for thermal
6130                  * sensor in adapter to kick in */
6131                 while (iwl_hw_get_temperature(priv) == 0) {
6132                         thermal_spin++;
6133                         udelay(10);
6134                 }
6135
6136                 if (thermal_spin)
6137                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
6138                                        thermal_spin * 10);
6139         } else
6140                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6141
6142         /* After the ALIVE response, we can process host commands */
6143         set_bit(STATUS_ALIVE, &priv->status);
6144
6145         /* Clear out the uCode error bit if it is set */
6146         clear_bit(STATUS_FW_ERROR, &priv->status);
6147
6148         rc = iwl_init_channel_map(priv);
6149         if (rc) {
6150                 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6151                 return;
6152         }
6153
6154         iwl_init_geos(priv);
6155
6156         if (iwl_is_rfkill(priv))
6157                 return;
6158
6159         if (!priv->mac80211_registered) {
6160                 /* Unlock so any user space entry points can call back into
6161                  * the driver without a deadlock... */
6162                 mutex_unlock(&priv->mutex);
6163                 iwl_rate_control_register(priv->hw);
6164                 rc = ieee80211_register_hw(priv->hw);
6165                 priv->hw->conf.beacon_int = 100;
6166                 mutex_lock(&priv->mutex);
6167
6168                 if (rc) {
6169                         IWL_ERROR("Failed to register network "
6170                                   "device (error %d)\n", rc);
6171                         return;
6172                 }
6173
6174                 priv->mac80211_registered = 1;
6175
6176                 iwl_reset_channel_flag(priv);
6177         } else
6178                 ieee80211_start_queues(priv->hw);
6179
6180         priv->active_rate = priv->rates_mask;
6181         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6182
6183         iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6184
6185         if (iwl_is_associated(priv)) {
6186                 struct iwl_rxon_cmd *active_rxon =
6187                                 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6188
6189                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6190                        sizeof(priv->staging_rxon));
6191                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6192         } else {
6193                 /* Initialize our rx_config data */
6194                 iwl_connection_init_rx_config(priv);
6195                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6196         }
6197
6198         /* Configure BT coexistence */
6199         iwl_send_bt_config(priv);
6200
6201         /* Configure the adapter for unassociated operation */
6202         iwl_commit_rxon(priv);
6203
6204         /* At this point, the NIC is initialized and operational */
6205         priv->notif_missed_beacons = 0;
6206         set_bit(STATUS_READY, &priv->status);
6207
6208         iwl3945_reg_txpower_periodic(priv);
6209
6210         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6211
6212         if (priv->error_recovering)
6213                 iwl_error_recovery(priv);
6214
6215         return;
6216
6217  restart:
6218         queue_work(priv->workqueue, &priv->restart);
6219 }
6220
6221 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6222
6223 static void __iwl_down(struct iwl_priv *priv)
6224 {
6225         unsigned long flags;
6226         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6227         struct ieee80211_conf *conf = NULL;
6228
6229         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6230
6231         conf = ieee80211_get_hw_conf(priv->hw);
6232
6233         if (!exit_pending)
6234                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6235
6236         iwl_clear_stations_table(priv);
6237
6238         /* Unblock any waiting calls */
6239         wake_up_interruptible_all(&priv->wait_command_queue);
6240
6241         iwl_cancel_deferred_work(priv);
6242
6243         /* Wipe out the EXIT_PENDING status bit if we are not actually
6244          * exiting the module */
6245         if (!exit_pending)
6246                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6247
6248         /* stop and reset the on-board processor */
6249         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6250
6251         /* tell the device to stop sending interrupts */
6252         iwl_disable_interrupts(priv);
6253
6254         if (priv->mac80211_registered)
6255                 ieee80211_stop_queues(priv->hw);
6256
6257         /* If we have not previously called iwl_init() then
6258          * clear all bits but the RF Kill and SUSPEND bits and return */
6259         if (!iwl_is_init(priv)) {
6260                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6261                                         STATUS_RF_KILL_HW |
6262                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6263                                         STATUS_RF_KILL_SW |
6264                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6265                                         STATUS_IN_SUSPEND;
6266                 goto exit;
6267         }
6268
6269         /* ...otherwise clear out all the status bits but the RF Kill and
6270          * SUSPEND bits and continue taking the NIC down. */
6271         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6272                                 STATUS_RF_KILL_HW |
6273                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6274                                 STATUS_RF_KILL_SW |
6275                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6276                                 STATUS_IN_SUSPEND |
6277                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6278                                 STATUS_FW_ERROR;
6279
6280         spin_lock_irqsave(&priv->lock, flags);
6281         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6282         spin_unlock_irqrestore(&priv->lock, flags);
6283
6284         iwl_hw_txq_ctx_stop(priv);
6285         iwl_hw_rxq_stop(priv);
6286
6287         spin_lock_irqsave(&priv->lock, flags);
6288         if (!iwl_grab_restricted_access(priv)) {
6289                 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6290                                          APMG_CLK_VAL_DMA_CLK_RQT);
6291                 iwl_release_restricted_access(priv);
6292         }
6293         spin_unlock_irqrestore(&priv->lock, flags);
6294
6295         udelay(5);
6296
6297         iwl_hw_nic_stop_master(priv);
6298         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6299         iwl_hw_nic_reset(priv);
6300
6301  exit:
6302         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6303
6304         if (priv->ibss_beacon)
6305                 dev_kfree_skb(priv->ibss_beacon);
6306         priv->ibss_beacon = NULL;
6307
6308         /* clear out any free frames */
6309         iwl_clear_free_frames(priv);
6310 }
6311
6312 static void iwl_down(struct iwl_priv *priv)
6313 {
6314         mutex_lock(&priv->mutex);
6315         __iwl_down(priv);
6316         mutex_unlock(&priv->mutex);
6317 }
6318
6319 #define MAX_HW_RESTARTS 5
6320
6321 static int __iwl_up(struct iwl_priv *priv)
6322 {
6323         DECLARE_MAC_BUF(mac);
6324         int rc, i;
6325
6326         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6327                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6328                 return -EIO;
6329         }
6330
6331         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6332                 IWL_WARNING("Radio disabled by SW RF kill (module "
6333                             "parameter)\n");
6334                 return 0;
6335         }
6336
6337         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6338
6339         rc = iwl_hw_nic_init(priv);
6340         if (rc) {
6341                 IWL_ERROR("Unable to int nic\n");
6342                 return rc;
6343         }
6344
6345         /* make sure rfkill handshake bits are cleared */
6346         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6347         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6348                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6349
6350         /* clear (again), then enable host interrupts */
6351         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6352         iwl_enable_interrupts(priv);
6353
6354         /* really make sure rfkill handshake bits are cleared */
6355         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6356         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6357
6358         /* Copy original ucode data image from disk into backup cache.
6359          * This will be used to initialize the on-board processor's
6360          * data SRAM for a clean start when the runtime program first loads. */
6361         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6362                         priv->ucode_data.len);
6363
6364         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6365
6366                 iwl_clear_stations_table(priv);
6367
6368                 /* load bootstrap state machine,
6369                  * load bootstrap program into processor's memory,
6370                  * prepare to load the "initialize" uCode */
6371                 rc = iwl_load_bsm(priv);
6372
6373                 if (rc) {
6374                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6375                         continue;
6376                 }
6377
6378                 /* start card; "initialize" will load runtime ucode */
6379                 iwl_nic_start(priv);
6380
6381                 /* MAC Address location in EEPROM same for 3945/4965 */
6382                 get_eeprom_mac(priv, priv->mac_addr);
6383                 IWL_DEBUG_INFO("MAC address: %s\n",
6384                                print_mac(mac, priv->mac_addr));
6385
6386                 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6387
6388                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6389
6390                 return 0;
6391         }
6392
6393         set_bit(STATUS_EXIT_PENDING, &priv->status);
6394         __iwl_down(priv);
6395
6396         /* tried to restart and config the device for as long as our
6397          * patience could withstand */
6398         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6399         return -EIO;
6400 }
6401
6402
6403 /*****************************************************************************
6404  *
6405  * Workqueue callbacks
6406  *
6407  *****************************************************************************/
6408
6409 static void iwl_bg_init_alive_start(struct work_struct *data)
6410 {
6411         struct iwl_priv *priv =
6412             container_of(data, struct iwl_priv, init_alive_start.work);
6413
6414         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6415                 return;
6416
6417         mutex_lock(&priv->mutex);
6418         iwl_init_alive_start(priv);
6419         mutex_unlock(&priv->mutex);
6420 }
6421
6422 static void iwl_bg_alive_start(struct work_struct *data)
6423 {
6424         struct iwl_priv *priv =
6425             container_of(data, struct iwl_priv, alive_start.work);
6426
6427         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6428                 return;
6429
6430         mutex_lock(&priv->mutex);
6431         iwl_alive_start(priv);
6432         mutex_unlock(&priv->mutex);
6433 }
6434
6435 static void iwl_bg_rf_kill(struct work_struct *work)
6436 {
6437         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6438
6439         wake_up_interruptible(&priv->wait_command_queue);
6440
6441         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6442                 return;
6443
6444         mutex_lock(&priv->mutex);
6445
6446         if (!iwl_is_rfkill(priv)) {
6447                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6448                           "HW and/or SW RF Kill no longer active, restarting "
6449                           "device\n");
6450                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6451                         queue_work(priv->workqueue, &priv->restart);
6452         } else {
6453
6454                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6455                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6456                                           "disabled by SW switch\n");
6457                 else
6458                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6459                                     "Kill switch must be turned off for "
6460                                     "wireless networking to work.\n");
6461         }
6462         mutex_unlock(&priv->mutex);
6463 }
6464
6465 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6466
6467 static void iwl_bg_scan_check(struct work_struct *data)
6468 {
6469         struct iwl_priv *priv =
6470             container_of(data, struct iwl_priv, scan_check.work);
6471
6472         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6473                 return;
6474
6475         mutex_lock(&priv->mutex);
6476         if (test_bit(STATUS_SCANNING, &priv->status) ||
6477             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6478                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6479                           "Scan completion watchdog resetting adapter (%dms)\n",
6480                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6481                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6482                         queue_work(priv->workqueue, &priv->restart);
6483         }
6484         mutex_unlock(&priv->mutex);
6485 }
6486
6487 static void iwl_bg_request_scan(struct work_struct *data)
6488 {
6489         struct iwl_priv *priv =
6490             container_of(data, struct iwl_priv, request_scan);
6491         struct iwl_host_cmd cmd = {
6492                 .id = REPLY_SCAN_CMD,
6493                 .len = sizeof(struct iwl_scan_cmd),
6494                 .meta.flags = CMD_SIZE_HUGE,
6495         };
6496         int rc = 0;
6497         struct iwl_scan_cmd *scan;
6498         struct ieee80211_conf *conf = NULL;
6499         u8 direct_mask;
6500         int phymode;
6501
6502         conf = ieee80211_get_hw_conf(priv->hw);
6503
6504         mutex_lock(&priv->mutex);
6505
6506         if (!iwl_is_ready(priv)) {
6507                 IWL_WARNING("request scan called when driver not ready.\n");
6508                 goto done;
6509         }
6510
6511         /* Make sure the scan wasn't cancelled before this queued work
6512          * was given the chance to run... */
6513         if (!test_bit(STATUS_SCANNING, &priv->status))
6514                 goto done;
6515
6516         /* This should never be called or scheduled if there is currently
6517          * a scan active in the hardware. */
6518         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6519                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6520                                "Ignoring second request.\n");
6521                 rc = -EIO;
6522                 goto done;
6523         }
6524
6525         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6526                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6527                 goto done;
6528         }
6529
6530         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6531                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6532                 goto done;
6533         }
6534
6535         if (iwl_is_rfkill(priv)) {
6536                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6537                 goto done;
6538         }
6539
6540         if (!test_bit(STATUS_READY, &priv->status)) {
6541                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6542                 goto done;
6543         }
6544
6545         if (!priv->scan_bands) {
6546                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6547                 goto done;
6548         }
6549
6550         if (!priv->scan) {
6551                 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6552                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6553                 if (!priv->scan) {
6554                         rc = -ENOMEM;
6555                         goto done;
6556                 }
6557         }
6558         scan = priv->scan;
6559         memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6560
6561         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6562         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6563
6564         if (iwl_is_associated(priv)) {
6565                 u16 interval = 0;
6566                 u32 extra;
6567                 u32 suspend_time = 100;
6568                 u32 scan_suspend_time = 100;
6569                 unsigned long flags;
6570
6571                 IWL_DEBUG_INFO("Scanning while associated...\n");
6572
6573                 spin_lock_irqsave(&priv->lock, flags);
6574                 interval = priv->beacon_int;
6575                 spin_unlock_irqrestore(&priv->lock, flags);
6576
6577                 scan->suspend_time = 0;
6578                 scan->max_out_time = cpu_to_le32(600 * 1024);
6579                 if (!interval)
6580                         interval = suspend_time;
6581                 /*
6582                  * suspend time format:
6583                  *  0-19: beacon interval in usec (time before exec.)
6584                  * 20-23: 0
6585                  * 24-31: number of beacons (suspend between channels)
6586                  */
6587
6588                 extra = (suspend_time / interval) << 24;
6589                 scan_suspend_time = 0xFF0FFFFF &
6590                     (extra | ((suspend_time % interval) * 1024));
6591
6592                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6593                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6594                                scan_suspend_time, interval);
6595         }
6596
6597         /* We should add the ability for user to lock to PASSIVE ONLY */
6598         if (priv->one_direct_scan) {
6599                 IWL_DEBUG_SCAN
6600                     ("Kicking off one direct scan for '%s'\n",
6601                      iwl_escape_essid(priv->direct_ssid,
6602                                       priv->direct_ssid_len));
6603                 scan->direct_scan[0].id = WLAN_EID_SSID;
6604                 scan->direct_scan[0].len = priv->direct_ssid_len;
6605                 memcpy(scan->direct_scan[0].ssid,
6606                        priv->direct_ssid, priv->direct_ssid_len);
6607                 direct_mask = 1;
6608         } else if (!iwl_is_associated(priv)) {
6609                 scan->direct_scan[0].id = WLAN_EID_SSID;
6610                 scan->direct_scan[0].len = priv->essid_len;
6611                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6612                 direct_mask = 1;
6613         } else
6614                 direct_mask = 0;
6615
6616         /* We don't build a direct scan probe request; the uCode will do
6617          * that based on the direct_mask added to each channel entry */
6618         scan->tx_cmd.len = cpu_to_le16(
6619                 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6620                         IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6621         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6622         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6623         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6624
6625         /* flags + rate selection */
6626
6627         switch (priv->scan_bands) {
6628         case 2:
6629                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6630                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6631                 scan->good_CRC_th = 0;
6632                 phymode = MODE_IEEE80211G;
6633                 break;
6634
6635         case 1:
6636                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6637                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6638                 phymode = MODE_IEEE80211A;
6639                 break;
6640
6641         default:
6642                 IWL_WARNING("Invalid scan band count\n");
6643                 goto done;
6644         }
6645
6646         /* select Rx antennas */
6647         scan->flags |= iwl3945_get_antenna_flags(priv);
6648
6649         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6650                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6651
6652         if (direct_mask)
6653                 IWL_DEBUG_SCAN
6654                     ("Initiating direct scan for %s.\n",
6655                      iwl_escape_essid(priv->essid, priv->essid_len));
6656         else
6657                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6658
6659         scan->channel_count =
6660                 iwl_get_channels_for_scan(
6661                         priv, phymode, 1, /* active */
6662                         direct_mask,
6663                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6664
6665         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6666             scan->channel_count * sizeof(struct iwl_scan_channel);
6667         cmd.data = scan;
6668         scan->len = cpu_to_le16(cmd.len);
6669
6670         set_bit(STATUS_SCAN_HW, &priv->status);
6671         rc = iwl_send_cmd_sync(priv, &cmd);
6672         if (rc)
6673                 goto done;
6674
6675         queue_delayed_work(priv->workqueue, &priv->scan_check,
6676                            IWL_SCAN_CHECK_WATCHDOG);
6677
6678         mutex_unlock(&priv->mutex);
6679         return;
6680
6681  done:
6682         /* inform mac80211 sacn aborted */
6683         queue_work(priv->workqueue, &priv->scan_completed);
6684         mutex_unlock(&priv->mutex);
6685 }
6686
6687 static void iwl_bg_up(struct work_struct *data)
6688 {
6689         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
6690
6691         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6692                 return;
6693
6694         mutex_lock(&priv->mutex);
6695         __iwl_up(priv);
6696         mutex_unlock(&priv->mutex);
6697 }
6698
6699 static void iwl_bg_restart(struct work_struct *data)
6700 {
6701         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
6702
6703         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6704                 return;
6705
6706         iwl_down(priv);
6707         queue_work(priv->workqueue, &priv->up);
6708 }
6709
6710 static void iwl_bg_rx_replenish(struct work_struct *data)
6711 {
6712         struct iwl_priv *priv =
6713             container_of(data, struct iwl_priv, rx_replenish);
6714
6715         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6716                 return;
6717
6718         mutex_lock(&priv->mutex);
6719         iwl_rx_replenish(priv);
6720         mutex_unlock(&priv->mutex);
6721 }
6722
6723 static void iwl_bg_post_associate(struct work_struct *data)
6724 {
6725         struct iwl_priv *priv = container_of(data, struct iwl_priv,
6726                                              post_associate.work);
6727
6728         int rc = 0;
6729         struct ieee80211_conf *conf = NULL;
6730         DECLARE_MAC_BUF(mac);
6731
6732         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6733                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6734                 return;
6735         }
6736
6737
6738         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6739                         priv->assoc_id,
6740                         print_mac(mac, priv->active_rxon.bssid_addr));
6741
6742         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6743                 return;
6744
6745         mutex_lock(&priv->mutex);
6746
6747         conf = ieee80211_get_hw_conf(priv->hw);
6748
6749         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6750         iwl_commit_rxon(priv);
6751
6752         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
6753         iwl_setup_rxon_timing(priv);
6754         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6755                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6756         if (rc)
6757                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6758                             "Attempting to continue.\n");
6759
6760         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6761
6762         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6763
6764         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6765                         priv->assoc_id, priv->beacon_int);
6766
6767         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6768                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6769         else
6770                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6771
6772         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6773                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6774                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6775                 else
6776                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6777
6778                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6779                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6780
6781         }
6782
6783         iwl_commit_rxon(priv);
6784
6785         switch (priv->iw_mode) {
6786         case IEEE80211_IF_TYPE_STA:
6787                 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
6788                 break;
6789
6790         case IEEE80211_IF_TYPE_IBSS:
6791
6792                 /* clear out the station table */
6793                 iwl_clear_stations_table(priv);
6794
6795                 iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
6796                 iwl_add_station(priv, priv->bssid, 0, 0);
6797                 iwl3945_sync_sta(priv, IWL_STA_ID,
6798                                  (priv->phymode == MODE_IEEE80211A)?
6799                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6800                                  CMD_ASYNC);
6801                 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
6802                 iwl_send_beacon_cmd(priv);
6803
6804                 break;
6805
6806         default:
6807                  IWL_ERROR("%s Should not be called in %d mode\n",
6808                                 __FUNCTION__, priv->iw_mode);
6809                 break;
6810         }
6811
6812         iwl_sequence_reset(priv);
6813
6814 #ifdef CONFIG_IWLWIFI_QOS
6815         iwl_activate_qos(priv, 0);
6816 #endif /* CONFIG_IWLWIFI_QOS */
6817         mutex_unlock(&priv->mutex);
6818 }
6819
6820 static void iwl_bg_abort_scan(struct work_struct *work)
6821 {
6822         struct iwl_priv *priv = container_of(work, struct iwl_priv,
6823                                              abort_scan);
6824
6825         if (!iwl_is_ready(priv))
6826                 return;
6827
6828         mutex_lock(&priv->mutex);
6829
6830         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6831         iwl_send_scan_abort(priv);
6832
6833         mutex_unlock(&priv->mutex);
6834 }
6835
6836 static void iwl_bg_scan_completed(struct work_struct *work)
6837 {
6838         struct iwl_priv *priv =
6839             container_of(work, struct iwl_priv, scan_completed);
6840
6841         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6842
6843         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6844                 return;
6845
6846         ieee80211_scan_completed(priv->hw);
6847
6848         /* Since setting the TXPOWER may have been deferred while
6849          * performing the scan, fire one off */
6850         mutex_lock(&priv->mutex);
6851         iwl_hw_reg_send_txpower(priv);
6852         mutex_unlock(&priv->mutex);
6853 }
6854
6855 /*****************************************************************************
6856  *
6857  * mac80211 entry point functions
6858  *
6859  *****************************************************************************/
6860
6861 static int iwl_mac_start(struct ieee80211_hw *hw)
6862 {
6863         struct iwl_priv *priv = hw->priv;
6864
6865         IWL_DEBUG_MAC80211("enter\n");
6866
6867         /* we should be verifying the device is ready to be opened */
6868         mutex_lock(&priv->mutex);
6869
6870         priv->is_open = 1;
6871
6872         if (!iwl_is_rfkill(priv))
6873                 ieee80211_start_queues(priv->hw);
6874
6875         mutex_unlock(&priv->mutex);
6876         IWL_DEBUG_MAC80211("leave\n");
6877         return 0;
6878 }
6879
6880 static void iwl_mac_stop(struct ieee80211_hw *hw)
6881 {
6882         struct iwl_priv *priv = hw->priv;
6883
6884         IWL_DEBUG_MAC80211("enter\n");
6885         priv->is_open = 0;
6886         /*netif_stop_queue(dev); */
6887         flush_workqueue(priv->workqueue);
6888         IWL_DEBUG_MAC80211("leave\n");
6889 }
6890
6891 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6892                       struct ieee80211_tx_control *ctl)
6893 {
6894         struct iwl_priv *priv = hw->priv;
6895
6896         IWL_DEBUG_MAC80211("enter\n");
6897
6898         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6899                 IWL_DEBUG_MAC80211("leave - monitor\n");
6900                 return -1;
6901         }
6902
6903         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6904                      ctl->tx_rate);
6905
6906         if (iwl_tx_skb(priv, skb, ctl))
6907                 dev_kfree_skb_any(skb);
6908
6909         IWL_DEBUG_MAC80211("leave\n");
6910         return 0;
6911 }
6912
6913 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
6914                                  struct ieee80211_if_init_conf *conf)
6915 {
6916         struct iwl_priv *priv = hw->priv;
6917         unsigned long flags;
6918         DECLARE_MAC_BUF(mac);
6919
6920         IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
6921         if (conf->mac_addr)
6922                 IWL_DEBUG_MAC80211("enter: MAC %s\n",
6923                                    print_mac(mac, conf->mac_addr));
6924
6925         if (priv->interface_id) {
6926                 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
6927                 return 0;
6928         }
6929
6930         spin_lock_irqsave(&priv->lock, flags);
6931         priv->interface_id = conf->if_id;
6932
6933         spin_unlock_irqrestore(&priv->lock, flags);
6934
6935         mutex_lock(&priv->mutex);
6936         iwl_set_mode(priv, conf->type);
6937
6938         IWL_DEBUG_MAC80211("leave\n");
6939         mutex_unlock(&priv->mutex);
6940
6941         return 0;
6942 }
6943
6944 /**
6945  * iwl_mac_config - mac80211 config callback
6946  *
6947  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6948  * be set inappropriately and the driver currently sets the hardware up to
6949  * use it whenever needed.
6950  */
6951 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6952 {
6953         struct iwl_priv *priv = hw->priv;
6954         const struct iwl_channel_info *ch_info;
6955         unsigned long flags;
6956
6957         mutex_lock(&priv->mutex);
6958         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
6959
6960         if (!iwl_is_ready(priv)) {
6961                 IWL_DEBUG_MAC80211("leave - not ready\n");
6962                 mutex_unlock(&priv->mutex);
6963                 return -EIO;
6964         }
6965
6966         /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
6967          * what is exposed through include/ declrations */
6968         if (unlikely(!iwl_param_disable_hw_scan &&
6969                      test_bit(STATUS_SCANNING, &priv->status))) {
6970                 IWL_DEBUG_MAC80211("leave - scanning\n");
6971                 mutex_unlock(&priv->mutex);
6972                 return 0;
6973         }
6974
6975         spin_lock_irqsave(&priv->lock, flags);
6976
6977         ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
6978         if (!is_channel_valid(ch_info)) {
6979                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
6980                                conf->channel, conf->phymode);
6981                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6982                 spin_unlock_irqrestore(&priv->lock, flags);
6983                 mutex_unlock(&priv->mutex);
6984                 return -EINVAL;
6985         }
6986
6987         iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
6988
6989         iwl_set_flags_for_phymode(priv, conf->phymode);
6990
6991         /* The list of supported rates and rate mask can be different
6992          * for each phymode; since the phymode may have changed, reset
6993          * the rate mask to what mac80211 lists */
6994         iwl_set_rate(priv);
6995
6996         spin_unlock_irqrestore(&priv->lock, flags);
6997
6998 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6999         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7000                 iwl_hw_channel_switch(priv, conf->channel);
7001                 mutex_unlock(&priv->mutex);
7002                 return 0;
7003         }
7004 #endif
7005
7006         iwl_radio_kill_sw(priv, !conf->radio_enabled);
7007
7008         if (!conf->radio_enabled) {
7009                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7010                 mutex_unlock(&priv->mutex);
7011                 return 0;
7012         }
7013
7014         if (iwl_is_rfkill(priv)) {
7015                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7016                 mutex_unlock(&priv->mutex);
7017                 return -EIO;
7018         }
7019
7020         iwl_set_rate(priv);
7021
7022         if (memcmp(&priv->active_rxon,
7023                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7024                 iwl_commit_rxon(priv);
7025         else
7026                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7027
7028         IWL_DEBUG_MAC80211("leave\n");
7029
7030         mutex_unlock(&priv->mutex);
7031
7032         return 0;
7033 }
7034
7035 static void iwl_config_ap(struct iwl_priv *priv)
7036 {
7037         int rc = 0;
7038
7039         if (priv->status & STATUS_EXIT_PENDING)
7040                 return;
7041
7042         /* The following should be done only at AP bring up */
7043         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7044
7045                 /* RXON - unassoc (to set timing command) */
7046                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7047                 iwl_commit_rxon(priv);
7048
7049                 /* RXON Timing */
7050                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7051                 iwl_setup_rxon_timing(priv);
7052                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7053                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7054                 if (rc)
7055                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7056                                         "Attempting to continue.\n");
7057
7058                 /* FIXME: what should be the assoc_id for AP? */
7059                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7060                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7061                         priv->staging_rxon.flags |=
7062                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7063                 else
7064                         priv->staging_rxon.flags &=
7065                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7066
7067                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7068                         if (priv->assoc_capability &
7069                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7070                                 priv->staging_rxon.flags |=
7071                                         RXON_FLG_SHORT_SLOT_MSK;
7072                         else
7073                                 priv->staging_rxon.flags &=
7074                                         ~RXON_FLG_SHORT_SLOT_MSK;
7075
7076                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7077                                 priv->staging_rxon.flags &=
7078                                         ~RXON_FLG_SHORT_SLOT_MSK;
7079                 }
7080                 /* restore RXON assoc */
7081                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7082                 iwl_commit_rxon(priv);
7083                 iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
7084         }
7085         iwl_send_beacon_cmd(priv);
7086
7087         /* FIXME - we need to add code here to detect a totally new
7088          * configuration, reset the AP, unassoc, rxon timing, assoc,
7089          * clear sta table, add BCAST sta... */
7090 }
7091
7092 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7093                                     struct ieee80211_if_conf *conf)
7094 {
7095         struct iwl_priv *priv = hw->priv;
7096         DECLARE_MAC_BUF(mac);
7097         unsigned long flags;
7098         int rc;
7099
7100         if (conf == NULL)
7101                 return -EIO;
7102
7103         /* XXX: this MUST use conf->mac_addr */
7104
7105         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7106             (!conf->beacon || !conf->ssid_len)) {
7107                 IWL_DEBUG_MAC80211
7108                     ("Leaving in AP mode because HostAPD is not ready.\n");
7109                 return 0;
7110         }
7111
7112         mutex_lock(&priv->mutex);
7113
7114         IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7115         if (conf->bssid)
7116                 IWL_DEBUG_MAC80211("bssid: %s\n",
7117                                    print_mac(mac, conf->bssid));
7118
7119 /*
7120  * very dubious code was here; the probe filtering flag is never set:
7121  *
7122         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7123             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7124  */
7125         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7126                 IWL_DEBUG_MAC80211("leave - scanning\n");
7127                 mutex_unlock(&priv->mutex);
7128                 return 0;
7129         }
7130
7131         if (priv->interface_id != if_id) {
7132                 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7133                 mutex_unlock(&priv->mutex);
7134                 return 0;
7135         }
7136
7137         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7138                 if (!conf->bssid) {
7139                         conf->bssid = priv->mac_addr;
7140                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7141                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7142                                            print_mac(mac, conf->bssid));
7143                 }
7144                 if (priv->ibss_beacon)
7145                         dev_kfree_skb(priv->ibss_beacon);
7146
7147                 priv->ibss_beacon = conf->beacon;
7148         }
7149
7150         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7151             !is_multicast_ether_addr(conf->bssid)) {
7152                 /* If there is currently a HW scan going on in the background
7153                  * then we need to cancel it else the RXON below will fail. */
7154                 if (iwl_scan_cancel_timeout(priv, 100)) {
7155                         IWL_WARNING("Aborted scan still in progress "
7156                                     "after 100ms\n");
7157                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7158                         mutex_unlock(&priv->mutex);
7159                         return -EAGAIN;
7160                 }
7161                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7162
7163                 /* TODO: Audit driver for usage of these members and see
7164                  * if mac80211 deprecates them (priv->bssid looks like it
7165                  * shouldn't be there, but I haven't scanned the IBSS code
7166                  * to verify) - jpk */
7167                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7168
7169                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7170                         iwl_config_ap(priv);
7171                 else {
7172                         priv->staging_rxon.filter_flags |=
7173                                                 RXON_FILTER_ASSOC_MSK;
7174                         rc = iwl_commit_rxon(priv);
7175                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7176                                 iwl_add_station(priv,
7177                                         priv->active_rxon.bssid_addr, 1, 0);
7178                 }
7179
7180         } else {
7181                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7182                 iwl_commit_rxon(priv);
7183         }
7184
7185         spin_lock_irqsave(&priv->lock, flags);
7186         if (!conf->ssid_len)
7187                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7188         else
7189                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7190
7191         priv->essid_len = conf->ssid_len;
7192         spin_unlock_irqrestore(&priv->lock, flags);
7193
7194         IWL_DEBUG_MAC80211("leave\n");
7195         mutex_unlock(&priv->mutex);
7196
7197         return 0;
7198 }
7199
7200 static void iwl_configure_filter(struct ieee80211_hw *hw,
7201                                  unsigned int changed_flags,
7202                                  unsigned int *total_flags,
7203                                  int mc_count, struct dev_addr_list *mc_list)
7204 {
7205         /*
7206          * XXX: dummy
7207          * see also iwl_connection_init_rx_config
7208          */
7209         *total_flags = 0;
7210 }
7211
7212 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7213                                      struct ieee80211_if_init_conf *conf)
7214 {
7215         struct iwl_priv *priv = hw->priv;
7216
7217         IWL_DEBUG_MAC80211("enter\n");
7218
7219         mutex_lock(&priv->mutex);
7220         if (priv->interface_id == conf->if_id) {
7221                 priv->interface_id = 0;
7222                 memset(priv->bssid, 0, ETH_ALEN);
7223                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7224                 priv->essid_len = 0;
7225         }
7226         mutex_unlock(&priv->mutex);
7227
7228         IWL_DEBUG_MAC80211("leave\n");
7229
7230 }
7231
7232 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7233 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7234 {
7235         int rc = 0;
7236         unsigned long flags;
7237         struct iwl_priv *priv = hw->priv;
7238
7239         IWL_DEBUG_MAC80211("enter\n");
7240
7241         spin_lock_irqsave(&priv->lock, flags);
7242
7243         if (!iwl_is_ready_rf(priv)) {
7244                 rc = -EIO;
7245                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7246                 goto out_unlock;
7247         }
7248
7249         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7250                 rc = -EIO;
7251                 IWL_ERROR("ERROR: APs don't scan\n");
7252                 goto out_unlock;
7253         }
7254
7255         /* if we just finished scan ask for delay */
7256         if (priv->last_scan_jiffies &&
7257             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7258                        jiffies)) {
7259                 rc = -EAGAIN;
7260                 goto out_unlock;
7261         }
7262         if (len) {
7263                 IWL_DEBUG_SCAN("direct scan for  "
7264                                "%s [%d]\n ",
7265                                iwl_escape_essid(ssid, len), (int)len);
7266
7267                 priv->one_direct_scan = 1;
7268                 priv->direct_ssid_len = (u8)
7269                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7270                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7271         }
7272
7273         rc = iwl_scan_initiate(priv);
7274
7275         IWL_DEBUG_MAC80211("leave\n");
7276
7277 out_unlock:
7278         spin_unlock_irqrestore(&priv->lock, flags);
7279
7280         return rc;
7281 }
7282
7283 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7284                            const u8 *local_addr, const u8 *addr,
7285                            struct ieee80211_key_conf *key)
7286 {
7287         struct iwl_priv *priv = hw->priv;
7288         int rc = 0;
7289         u8 sta_id;
7290
7291         IWL_DEBUG_MAC80211("enter\n");
7292
7293         if (!iwl_param_hwcrypto) {
7294                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7295                 return -EOPNOTSUPP;
7296         }
7297
7298         if (is_zero_ether_addr(addr))
7299                 /* only support pairwise keys */
7300                 return -EOPNOTSUPP;
7301
7302         sta_id = iwl_hw_find_station(priv, addr);
7303         if (sta_id == IWL_INVALID_STATION) {
7304                 DECLARE_MAC_BUF(mac);
7305
7306                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7307                                    print_mac(mac, addr));
7308                 return -EINVAL;
7309         }
7310
7311         mutex_lock(&priv->mutex);
7312
7313         switch (cmd) {
7314         case  SET_KEY:
7315                 rc = iwl_update_sta_key_info(priv, key, sta_id);
7316                 if (!rc) {
7317                         iwl_set_rxon_hwcrypto(priv, 1);
7318                         iwl_commit_rxon(priv);
7319                         key->hw_key_idx = sta_id;
7320                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7321                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7322                 }
7323                 break;
7324         case DISABLE_KEY:
7325                 rc = iwl_clear_sta_key_info(priv, sta_id);
7326                 if (!rc) {
7327                         iwl_set_rxon_hwcrypto(priv, 0);
7328                         iwl_commit_rxon(priv);
7329                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7330                 }
7331                 break;
7332         default:
7333                 rc = -EINVAL;
7334         }
7335
7336         IWL_DEBUG_MAC80211("leave\n");
7337         mutex_unlock(&priv->mutex);
7338
7339         return rc;
7340 }
7341
7342 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7343                            const struct ieee80211_tx_queue_params *params)
7344 {
7345         struct iwl_priv *priv = hw->priv;
7346 #ifdef CONFIG_IWLWIFI_QOS
7347         unsigned long flags;
7348         int q;
7349 #endif /* CONFIG_IWL_QOS */
7350
7351         IWL_DEBUG_MAC80211("enter\n");
7352
7353         if (!iwl_is_ready_rf(priv)) {
7354                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7355                 return -EIO;
7356         }
7357
7358         if (queue >= AC_NUM) {
7359                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7360                 return 0;
7361         }
7362
7363 #ifdef CONFIG_IWLWIFI_QOS
7364         if (!priv->qos_data.qos_enable) {
7365                 priv->qos_data.qos_active = 0;
7366                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7367                 return 0;
7368         }
7369         q = AC_NUM - 1 - queue;
7370
7371         spin_lock_irqsave(&priv->lock, flags);
7372
7373         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7374         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7375         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7376         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7377                         cpu_to_le16((params->burst_time * 100));
7378
7379         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7380         priv->qos_data.qos_active = 1;
7381
7382         spin_unlock_irqrestore(&priv->lock, flags);
7383
7384         mutex_lock(&priv->mutex);
7385         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7386                 iwl_activate_qos(priv, 1);
7387         else if (priv->assoc_id && iwl_is_associated(priv))
7388                 iwl_activate_qos(priv, 0);
7389
7390         mutex_unlock(&priv->mutex);
7391
7392 #endif /*CONFIG_IWLWIFI_QOS */
7393
7394         IWL_DEBUG_MAC80211("leave\n");
7395         return 0;
7396 }
7397
7398 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7399                                 struct ieee80211_tx_queue_stats *stats)
7400 {
7401         struct iwl_priv *priv = hw->priv;
7402         int i, avail;
7403         struct iwl_tx_queue *txq;
7404         struct iwl_queue *q;
7405         unsigned long flags;
7406
7407         IWL_DEBUG_MAC80211("enter\n");
7408
7409         if (!iwl_is_ready_rf(priv)) {
7410                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7411                 return -EIO;
7412         }
7413
7414         spin_lock_irqsave(&priv->lock, flags);
7415
7416         for (i = 0; i < AC_NUM; i++) {
7417                 txq = &priv->txq[i];
7418                 q = &txq->q;
7419                 avail = iwl_queue_space(q);
7420
7421                 stats->data[i].len = q->n_window - avail;
7422                 stats->data[i].limit = q->n_window - q->high_mark;
7423                 stats->data[i].count = q->n_window;
7424
7425         }
7426         spin_unlock_irqrestore(&priv->lock, flags);
7427
7428         IWL_DEBUG_MAC80211("leave\n");
7429
7430         return 0;
7431 }
7432
7433 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7434                              struct ieee80211_low_level_stats *stats)
7435 {
7436         IWL_DEBUG_MAC80211("enter\n");
7437         IWL_DEBUG_MAC80211("leave\n");
7438
7439         return 0;
7440 }
7441
7442 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7443 {
7444         IWL_DEBUG_MAC80211("enter\n");
7445         IWL_DEBUG_MAC80211("leave\n");
7446
7447         return 0;
7448 }
7449
7450 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7451 {
7452         struct iwl_priv *priv = hw->priv;
7453         unsigned long flags;
7454
7455         mutex_lock(&priv->mutex);
7456         IWL_DEBUG_MAC80211("enter\n");
7457
7458 #ifdef CONFIG_IWLWIFI_QOS
7459         iwl_reset_qos(priv);
7460 #endif
7461         cancel_delayed_work(&priv->post_associate);
7462
7463         spin_lock_irqsave(&priv->lock, flags);
7464         priv->assoc_id = 0;
7465         priv->assoc_capability = 0;
7466         priv->call_post_assoc_from_beacon = 0;
7467
7468         /* new association get rid of ibss beacon skb */
7469         if (priv->ibss_beacon)
7470                 dev_kfree_skb(priv->ibss_beacon);
7471
7472         priv->ibss_beacon = NULL;
7473
7474         priv->beacon_int = priv->hw->conf.beacon_int;
7475         priv->timestamp1 = 0;
7476         priv->timestamp0 = 0;
7477         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7478                 priv->beacon_int = 0;
7479
7480         spin_unlock_irqrestore(&priv->lock, flags);
7481
7482         /* Per mac80211.h: This is only used in IBSS mode... */
7483         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7484                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7485                 mutex_unlock(&priv->mutex);
7486                 return;
7487         }
7488
7489         if (!iwl_is_ready_rf(priv)) {
7490                 IWL_DEBUG_MAC80211("leave - not ready\n");
7491                 mutex_unlock(&priv->mutex);
7492                 return;
7493         }
7494
7495         priv->only_active_channel = 0;
7496
7497         iwl_set_rate(priv);
7498
7499         mutex_unlock(&priv->mutex);
7500
7501         IWL_DEBUG_MAC80211("leave\n");
7502
7503 }
7504
7505 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7506                                  struct ieee80211_tx_control *control)
7507 {
7508         struct iwl_priv *priv = hw->priv;
7509         unsigned long flags;
7510
7511         mutex_lock(&priv->mutex);
7512         IWL_DEBUG_MAC80211("enter\n");
7513
7514         if (!iwl_is_ready_rf(priv)) {
7515                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7516                 mutex_unlock(&priv->mutex);
7517                 return -EIO;
7518         }
7519
7520         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7521                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7522                 mutex_unlock(&priv->mutex);
7523                 return -EIO;
7524         }
7525
7526         spin_lock_irqsave(&priv->lock, flags);
7527
7528         if (priv->ibss_beacon)
7529                 dev_kfree_skb(priv->ibss_beacon);
7530
7531         priv->ibss_beacon = skb;
7532
7533         priv->assoc_id = 0;
7534
7535         IWL_DEBUG_MAC80211("leave\n");
7536         spin_unlock_irqrestore(&priv->lock, flags);
7537
7538 #ifdef CONFIG_IWLWIFI_QOS
7539         iwl_reset_qos(priv);
7540 #endif
7541
7542         queue_work(priv->workqueue, &priv->post_associate.work);
7543
7544         mutex_unlock(&priv->mutex);
7545
7546         return 0;
7547 }
7548
7549 /*****************************************************************************
7550  *
7551  * sysfs attributes
7552  *
7553  *****************************************************************************/
7554
7555 #ifdef CONFIG_IWLWIFI_DEBUG
7556
7557 /*
7558  * The following adds a new attribute to the sysfs representation
7559  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7560  * used for controlling the debug level.
7561  *
7562  * See the level definitions in iwl for details.
7563  */
7564
7565 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7566 {
7567         return sprintf(buf, "0x%08X\n", iwl_debug_level);
7568 }
7569 static ssize_t store_debug_level(struct device_driver *d,
7570                                  const char *buf, size_t count)
7571 {
7572         char *p = (char *)buf;
7573         u32 val;
7574
7575         val = simple_strtoul(p, &p, 0);
7576         if (p == buf)
7577                 printk(KERN_INFO DRV_NAME
7578                        ": %s is not in hex or decimal form.\n", buf);
7579         else
7580                 iwl_debug_level = val;
7581
7582         return strnlen(buf, count);
7583 }
7584
7585 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7586                    show_debug_level, store_debug_level);
7587
7588 #endif /* CONFIG_IWLWIFI_DEBUG */
7589
7590 static ssize_t show_rf_kill(struct device *d,
7591                             struct device_attribute *attr, char *buf)
7592 {
7593         /*
7594          * 0 - RF kill not enabled
7595          * 1 - SW based RF kill active (sysfs)
7596          * 2 - HW based RF kill active
7597          * 3 - Both HW and SW based RF kill active
7598          */
7599         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7600         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7601                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7602
7603         return sprintf(buf, "%i\n", val);
7604 }
7605
7606 static ssize_t store_rf_kill(struct device *d,
7607                              struct device_attribute *attr,
7608                              const char *buf, size_t count)
7609 {
7610         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7611
7612         mutex_lock(&priv->mutex);
7613         iwl_radio_kill_sw(priv, buf[0] == '1');
7614         mutex_unlock(&priv->mutex);
7615
7616         return count;
7617 }
7618
7619 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7620
7621 static ssize_t show_temperature(struct device *d,
7622                                 struct device_attribute *attr, char *buf)
7623 {
7624         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7625
7626         if (!iwl_is_alive(priv))
7627                 return -EAGAIN;
7628
7629         return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
7630 }
7631
7632 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7633
7634 static ssize_t show_rs_window(struct device *d,
7635                               struct device_attribute *attr,
7636                               char *buf)
7637 {
7638         struct iwl_priv *priv = d->driver_data;
7639         return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7640 }
7641 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7642
7643 static ssize_t show_tx_power(struct device *d,
7644                              struct device_attribute *attr, char *buf)
7645 {
7646         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7647         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7648 }
7649
7650 static ssize_t store_tx_power(struct device *d,
7651                               struct device_attribute *attr,
7652                               const char *buf, size_t count)
7653 {
7654         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7655         char *p = (char *)buf;
7656         u32 val;
7657
7658         val = simple_strtoul(p, &p, 10);
7659         if (p == buf)
7660                 printk(KERN_INFO DRV_NAME
7661                        ": %s is not in decimal form.\n", buf);
7662         else
7663                 iwl_hw_reg_set_txpower(priv, val);
7664
7665         return count;
7666 }
7667
7668 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7669
7670 static ssize_t show_flags(struct device *d,
7671                           struct device_attribute *attr, char *buf)
7672 {
7673         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7674
7675         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7676 }
7677
7678 static ssize_t store_flags(struct device *d,
7679                            struct device_attribute *attr,
7680                            const char *buf, size_t count)
7681 {
7682         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7683         u32 flags = simple_strtoul(buf, NULL, 0);
7684
7685         mutex_lock(&priv->mutex);
7686         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7687                 /* Cancel any currently running scans... */
7688                 if (iwl_scan_cancel_timeout(priv, 100))
7689                         IWL_WARNING("Could not cancel scan.\n");
7690                 else {
7691                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7692                                        flags);
7693                         priv->staging_rxon.flags = cpu_to_le32(flags);
7694                         iwl_commit_rxon(priv);
7695                 }
7696         }
7697         mutex_unlock(&priv->mutex);
7698
7699         return count;
7700 }
7701
7702 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7703
7704 static ssize_t show_filter_flags(struct device *d,
7705                                  struct device_attribute *attr, char *buf)
7706 {
7707         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7708
7709         return sprintf(buf, "0x%04X\n",
7710                 le32_to_cpu(priv->active_rxon.filter_flags));
7711 }
7712
7713 static ssize_t store_filter_flags(struct device *d,
7714                                   struct device_attribute *attr,
7715                                   const char *buf, size_t count)
7716 {
7717         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7718         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7719
7720         mutex_lock(&priv->mutex);
7721         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7722                 /* Cancel any currently running scans... */
7723                 if (iwl_scan_cancel_timeout(priv, 100))
7724                         IWL_WARNING("Could not cancel scan.\n");
7725                 else {
7726                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7727                                        "0x%04X\n", filter_flags);
7728                         priv->staging_rxon.filter_flags =
7729                                 cpu_to_le32(filter_flags);
7730                         iwl_commit_rxon(priv);
7731                 }
7732         }
7733         mutex_unlock(&priv->mutex);
7734
7735         return count;
7736 }
7737
7738 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7739                    store_filter_flags);
7740
7741 static ssize_t show_tune(struct device *d,
7742                          struct device_attribute *attr, char *buf)
7743 {
7744         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7745
7746         return sprintf(buf, "0x%04X\n",
7747                        (priv->phymode << 8) |
7748                         le16_to_cpu(priv->active_rxon.channel));
7749 }
7750
7751 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
7752
7753 static ssize_t store_tune(struct device *d,
7754                           struct device_attribute *attr,
7755                           const char *buf, size_t count)
7756 {
7757         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7758         char *p = (char *)buf;
7759         u16 tune = simple_strtoul(p, &p, 0);
7760         u8 phymode = (tune >> 8) & 0xff;
7761         u16 channel = tune & 0xff;
7762
7763         IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
7764
7765         mutex_lock(&priv->mutex);
7766         if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
7767             (priv->phymode != phymode)) {
7768                 const struct iwl_channel_info *ch_info;
7769
7770                 ch_info = iwl_get_channel_info(priv, phymode, channel);
7771                 if (!ch_info) {
7772                         IWL_WARNING("Requested invalid phymode/channel "
7773                                     "combination: %d %d\n", phymode, channel);
7774                         mutex_unlock(&priv->mutex);
7775                         return -EINVAL;
7776                 }
7777
7778                 /* Cancel any currently running scans... */
7779                 if (iwl_scan_cancel_timeout(priv, 100))
7780                         IWL_WARNING("Could not cancel scan.\n");
7781                 else {
7782                         IWL_DEBUG_INFO("Committing phymode and "
7783                                        "rxon.channel = %d %d\n",
7784                                        phymode, channel);
7785
7786                         iwl_set_rxon_channel(priv, phymode, channel);
7787                         iwl_set_flags_for_phymode(priv, phymode);
7788
7789                         iwl_set_rate(priv);
7790                         iwl_commit_rxon(priv);
7791                 }
7792         }
7793         mutex_unlock(&priv->mutex);
7794
7795         return count;
7796 }
7797
7798 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
7799
7800 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
7801
7802 static ssize_t show_measurement(struct device *d,
7803                                 struct device_attribute *attr, char *buf)
7804 {
7805         struct iwl_priv *priv = dev_get_drvdata(d);
7806         struct iwl_spectrum_notification measure_report;
7807         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7808         u8 *data = (u8 *) & measure_report;
7809         unsigned long flags;
7810
7811         spin_lock_irqsave(&priv->lock, flags);
7812         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7813                 spin_unlock_irqrestore(&priv->lock, flags);
7814                 return 0;
7815         }
7816         memcpy(&measure_report, &priv->measure_report, size);
7817         priv->measurement_status = 0;
7818         spin_unlock_irqrestore(&priv->lock, flags);
7819
7820         while (size && (PAGE_SIZE - len)) {
7821                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7822                                    PAGE_SIZE - len, 1);
7823                 len = strlen(buf);
7824                 if (PAGE_SIZE - len)
7825                         buf[len++] = '\n';
7826
7827                 ofs += 16;
7828                 size -= min(size, 16U);
7829         }
7830
7831         return len;
7832 }
7833
7834 static ssize_t store_measurement(struct device *d,
7835                                  struct device_attribute *attr,
7836                                  const char *buf, size_t count)
7837 {
7838         struct iwl_priv *priv = dev_get_drvdata(d);
7839         struct ieee80211_measurement_params params = {
7840                 .channel = le16_to_cpu(priv->active_rxon.channel),
7841                 .start_time = cpu_to_le64(priv->last_tsf),
7842                 .duration = cpu_to_le16(1),
7843         };
7844         u8 type = IWL_MEASURE_BASIC;
7845         u8 buffer[32];
7846         u8 channel;
7847
7848         if (count) {
7849                 char *p = buffer;
7850                 strncpy(buffer, buf, min(sizeof(buffer), count));
7851                 channel = simple_strtoul(p, NULL, 0);
7852                 if (channel)
7853                         params.channel = channel;
7854
7855                 p = buffer;
7856                 while (*p && *p != ' ')
7857                         p++;
7858                 if (*p)
7859                         type = simple_strtoul(p + 1, NULL, 0);
7860         }
7861
7862         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7863                        "channel %d (for '%s')\n", type, params.channel, buf);
7864         iwl_get_measurement(priv, &params, type);
7865
7866         return count;
7867 }
7868
7869 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7870                    show_measurement, store_measurement);
7871 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
7872
7873 static ssize_t show_rate(struct device *d,
7874                          struct device_attribute *attr, char *buf)
7875 {
7876         struct iwl_priv *priv = dev_get_drvdata(d);
7877         unsigned long flags;
7878         int i;
7879
7880         spin_lock_irqsave(&priv->sta_lock, flags);
7881         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
7882                 i = priv->stations[IWL_AP_ID].current_rate.s.rate;
7883         else
7884                 i = priv->stations[IWL_STA_ID].current_rate.s.rate;
7885         spin_unlock_irqrestore(&priv->sta_lock, flags);
7886
7887         i = iwl_rate_index_from_plcp(i);
7888         if (i == -1)
7889                 return sprintf(buf, "0\n");
7890
7891         return sprintf(buf, "%d%s\n",
7892                        (iwl_rates[i].ieee >> 1),
7893                        (iwl_rates[i].ieee & 0x1) ? ".5" : "");
7894 }
7895
7896 static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
7897
7898 static ssize_t store_retry_rate(struct device *d,
7899                                 struct device_attribute *attr,
7900                                 const char *buf, size_t count)
7901 {
7902         struct iwl_priv *priv = dev_get_drvdata(d);
7903
7904         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7905         if (priv->retry_rate <= 0)
7906                 priv->retry_rate = 1;
7907
7908         return count;
7909 }
7910
7911 static ssize_t show_retry_rate(struct device *d,
7912                                struct device_attribute *attr, char *buf)
7913 {
7914         struct iwl_priv *priv = dev_get_drvdata(d);
7915         return sprintf(buf, "%d", priv->retry_rate);
7916 }
7917
7918 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7919                    store_retry_rate);
7920
7921 static ssize_t store_power_level(struct device *d,
7922                                  struct device_attribute *attr,
7923                                  const char *buf, size_t count)
7924 {
7925         struct iwl_priv *priv = dev_get_drvdata(d);
7926         int rc;
7927         int mode;
7928
7929         mode = simple_strtoul(buf, NULL, 0);
7930         mutex_lock(&priv->mutex);
7931
7932         if (!iwl_is_ready(priv)) {
7933                 rc = -EAGAIN;
7934                 goto out;
7935         }
7936
7937         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7938                 mode = IWL_POWER_AC;
7939         else
7940                 mode |= IWL_POWER_ENABLED;
7941
7942         if (mode != priv->power_mode) {
7943                 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7944                 if (rc) {
7945                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7946                         goto out;
7947                 }
7948                 priv->power_mode = mode;
7949         }
7950
7951         rc = count;
7952
7953  out:
7954         mutex_unlock(&priv->mutex);
7955         return rc;
7956 }
7957
7958 #define MAX_WX_STRING 80
7959
7960 /* Values are in microsecond */
7961 static const s32 timeout_duration[] = {
7962         350000,
7963         250000,
7964         75000,
7965         37000,
7966         25000,
7967 };
7968 static const s32 period_duration[] = {
7969         400000,
7970         700000,
7971         1000000,
7972         1000000,
7973         1000000
7974 };
7975
7976 static ssize_t show_power_level(struct device *d,
7977                                 struct device_attribute *attr, char *buf)
7978 {
7979         struct iwl_priv *priv = dev_get_drvdata(d);
7980         int level = IWL_POWER_LEVEL(priv->power_mode);
7981         char *p = buf;
7982
7983         p += sprintf(p, "%d ", level);
7984         switch (level) {
7985         case IWL_POWER_MODE_CAM:
7986         case IWL_POWER_AC:
7987                 p += sprintf(p, "(AC)");
7988                 break;
7989         case IWL_POWER_BATTERY:
7990                 p += sprintf(p, "(BATTERY)");
7991                 break;
7992         default:
7993                 p += sprintf(p,
7994                              "(Timeout %dms, Period %dms)",
7995                              timeout_duration[level - 1] / 1000,
7996                              period_duration[level - 1] / 1000);
7997         }
7998
7999         if (!(priv->power_mode & IWL_POWER_ENABLED))
8000                 p += sprintf(p, " OFF\n");
8001         else
8002                 p += sprintf(p, " \n");
8003
8004         return (p - buf + 1);
8005
8006 }
8007
8008 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8009                    store_power_level);
8010
8011 static ssize_t show_channels(struct device *d,
8012                              struct device_attribute *attr, char *buf)
8013 {
8014         struct iwl_priv *priv = dev_get_drvdata(d);
8015         int len = 0, i;
8016         struct ieee80211_channel *channels = NULL;
8017         const struct ieee80211_hw_mode *hw_mode = NULL;
8018         int count = 0;
8019
8020         if (!iwl_is_ready(priv))
8021                 return -EAGAIN;
8022
8023         hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8024         if (!hw_mode)
8025                 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8026         if (hw_mode) {
8027                 channels = hw_mode->channels;
8028                 count = hw_mode->num_channels;
8029         }
8030
8031         len +=
8032             sprintf(&buf[len],
8033                     "Displaying %d channels in 2.4GHz band "
8034                     "(802.11bg):\n", count);
8035
8036         for (i = 0; i < count; i++)
8037                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8038                                channels[i].chan,
8039                                channels[i].power_level,
8040                                channels[i].
8041                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8042                                " (IEEE 802.11h required)" : "",
8043                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8044                                 || (channels[i].
8045                                     flag &
8046                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8047                                ", IBSS",
8048                                channels[i].
8049                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8050                                "active/passive" : "passive only");
8051
8052         hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8053         if (hw_mode) {
8054                 channels = hw_mode->channels;
8055                 count = hw_mode->num_channels;
8056         } else {
8057                 channels = NULL;
8058                 count = 0;
8059         }
8060
8061         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8062                        "(802.11a):\n", count);
8063
8064         for (i = 0; i < count; i++)
8065                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8066                                channels[i].chan,
8067                                channels[i].power_level,
8068                                channels[i].
8069                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8070                                " (IEEE 802.11h required)" : "",
8071                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8072                                 || (channels[i].
8073                                     flag &
8074                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8075                                ", IBSS",
8076                                channels[i].
8077                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8078                                "active/passive" : "passive only");
8079
8080         return len;
8081 }
8082
8083 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8084
8085 static ssize_t show_statistics(struct device *d,
8086                                struct device_attribute *attr, char *buf)
8087 {
8088         struct iwl_priv *priv = dev_get_drvdata(d);
8089         u32 size = sizeof(struct iwl_notif_statistics);
8090         u32 len = 0, ofs = 0;
8091         u8 *data = (u8 *) & priv->statistics;
8092         int rc = 0;
8093
8094         if (!iwl_is_alive(priv))
8095                 return -EAGAIN;
8096
8097         mutex_lock(&priv->mutex);
8098         rc = iwl_send_statistics_request(priv);
8099         mutex_unlock(&priv->mutex);
8100
8101         if (rc) {
8102                 len = sprintf(buf,
8103                               "Error sending statistics request: 0x%08X\n", rc);
8104                 return len;
8105         }
8106
8107         while (size && (PAGE_SIZE - len)) {
8108                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8109                                    PAGE_SIZE - len, 1);
8110                 len = strlen(buf);
8111                 if (PAGE_SIZE - len)
8112                         buf[len++] = '\n';
8113
8114                 ofs += 16;
8115                 size -= min(size, 16U);
8116         }
8117
8118         return len;
8119 }
8120
8121 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8122
8123 static ssize_t show_antenna(struct device *d,
8124                             struct device_attribute *attr, char *buf)
8125 {
8126         struct iwl_priv *priv = dev_get_drvdata(d);
8127
8128         if (!iwl_is_alive(priv))
8129                 return -EAGAIN;
8130
8131         return sprintf(buf, "%d\n", priv->antenna);
8132 }
8133
8134 static ssize_t store_antenna(struct device *d,
8135                              struct device_attribute *attr,
8136                              const char *buf, size_t count)
8137 {
8138         int ant;
8139         struct iwl_priv *priv = dev_get_drvdata(d);
8140
8141         if (count == 0)
8142                 return 0;
8143
8144         if (sscanf(buf, "%1i", &ant) != 1) {
8145                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8146                 return count;
8147         }
8148
8149         if ((ant >= 0) && (ant <= 2)) {
8150                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8151                 priv->antenna = (enum iwl_antenna)ant;
8152         } else
8153                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8154
8155
8156         return count;
8157 }
8158
8159 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8160
8161 static ssize_t show_status(struct device *d,
8162                            struct device_attribute *attr, char *buf)
8163 {
8164         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8165         if (!iwl_is_alive(priv))
8166                 return -EAGAIN;
8167         return sprintf(buf, "0x%08x\n", (int)priv->status);
8168 }
8169
8170 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8171
8172 static ssize_t dump_error_log(struct device *d,
8173                               struct device_attribute *attr,
8174                               const char *buf, size_t count)
8175 {
8176         char *p = (char *)buf;
8177
8178         if (p[0] == '1')
8179                 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8180
8181         return strnlen(buf, count);
8182 }
8183
8184 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8185
8186 static ssize_t dump_event_log(struct device *d,
8187                               struct device_attribute *attr,
8188                               const char *buf, size_t count)
8189 {
8190         char *p = (char *)buf;
8191
8192         if (p[0] == '1')
8193                 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8194
8195         return strnlen(buf, count);
8196 }
8197
8198 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8199
8200 /*****************************************************************************
8201  *
8202  * driver setup and teardown
8203  *
8204  *****************************************************************************/
8205
8206 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8207 {
8208         priv->workqueue = create_workqueue(DRV_NAME);
8209
8210         init_waitqueue_head(&priv->wait_command_queue);
8211
8212         INIT_WORK(&priv->up, iwl_bg_up);
8213         INIT_WORK(&priv->restart, iwl_bg_restart);
8214         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8215         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8216         INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8217         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8218         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8219         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8220         INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8221         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8222         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8223         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8224
8225         iwl_hw_setup_deferred_work(priv);
8226
8227         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8228                      iwl_irq_tasklet, (unsigned long)priv);
8229 }
8230
8231 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8232 {
8233         iwl_hw_cancel_deferred_work(priv);
8234
8235         cancel_delayed_work(&priv->scan_check);
8236         cancel_delayed_work(&priv->alive_start);
8237         cancel_delayed_work(&priv->post_associate);
8238         cancel_work_sync(&priv->beacon_update);
8239 }
8240
8241 static struct attribute *iwl_sysfs_entries[] = {
8242         &dev_attr_antenna.attr,
8243         &dev_attr_channels.attr,
8244         &dev_attr_dump_errors.attr,
8245         &dev_attr_dump_events.attr,
8246         &dev_attr_flags.attr,
8247         &dev_attr_filter_flags.attr,
8248 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8249         &dev_attr_measurement.attr,
8250 #endif
8251         &dev_attr_power_level.attr,
8252         &dev_attr_rate.attr,
8253         &dev_attr_retry_rate.attr,
8254         &dev_attr_rf_kill.attr,
8255         &dev_attr_rs_window.attr,
8256         &dev_attr_statistics.attr,
8257         &dev_attr_status.attr,
8258         &dev_attr_temperature.attr,
8259         &dev_attr_tune.attr,
8260         &dev_attr_tx_power.attr,
8261
8262         NULL
8263 };
8264
8265 static struct attribute_group iwl_attribute_group = {
8266         .name = NULL,           /* put in device directory */
8267         .attrs = iwl_sysfs_entries,
8268 };
8269
8270 static struct ieee80211_ops iwl_hw_ops = {
8271         .tx = iwl_mac_tx,
8272         .start = iwl_mac_start,
8273         .stop = iwl_mac_stop,
8274         .add_interface = iwl_mac_add_interface,
8275         .remove_interface = iwl_mac_remove_interface,
8276         .config = iwl_mac_config,
8277         .config_interface = iwl_mac_config_interface,
8278         .configure_filter = iwl_configure_filter,
8279         .set_key = iwl_mac_set_key,
8280         .get_stats = iwl_mac_get_stats,
8281         .get_tx_stats = iwl_mac_get_tx_stats,
8282         .conf_tx = iwl_mac_conf_tx,
8283         .get_tsf = iwl_mac_get_tsf,
8284         .reset_tsf = iwl_mac_reset_tsf,
8285         .beacon_update = iwl_mac_beacon_update,
8286         .hw_scan = iwl_mac_hw_scan
8287 };
8288
8289 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8290 {
8291         int err = 0;
8292         u32 pci_id;
8293         struct iwl_priv *priv;
8294         struct ieee80211_hw *hw;
8295         int i;
8296
8297         if (iwl_param_disable_hw_scan) {
8298                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8299                 iwl_hw_ops.hw_scan = NULL;
8300         }
8301
8302         if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8303             (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8304                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8305                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8306                 err = -EINVAL;
8307                 goto out;
8308         }
8309
8310         /* mac80211 allocates memory for this device instance, including
8311          *   space for this driver's private structure */
8312         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8313         if (hw == NULL) {
8314                 IWL_ERROR("Can not allocate network device\n");
8315                 err = -ENOMEM;
8316                 goto out;
8317         }
8318         SET_IEEE80211_DEV(hw, &pdev->dev);
8319
8320         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8321         priv = hw->priv;
8322         priv->hw = hw;
8323
8324         priv->pci_dev = pdev;
8325         priv->antenna = (enum iwl_antenna)iwl_param_antenna;
8326 #ifdef CONFIG_IWLWIFI_DEBUG
8327         iwl_debug_level = iwl_param_debug;
8328         atomic_set(&priv->restrict_refcnt, 0);
8329 #endif
8330         priv->retry_rate = 1;
8331
8332         priv->ibss_beacon = NULL;
8333
8334         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8335          *   the range of signal quality values that we'll provide.
8336          * Negative values for level/noise indicate that we'll provide dBm.
8337          * For WE, at least, non-0 values here *enable* display of values
8338          *   in app (iwconfig). */
8339         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8340         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8341         hw->max_signal = 100;   /* link quality indication (%) */
8342
8343         /* Tell mac80211 our Tx characteristics */
8344         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8345
8346         hw->queues = 4;
8347
8348         spin_lock_init(&priv->lock);
8349         spin_lock_init(&priv->power_data.lock);
8350         spin_lock_init(&priv->sta_lock);
8351         spin_lock_init(&priv->hcmd_lock);
8352
8353         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8354                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8355
8356         INIT_LIST_HEAD(&priv->free_frames);
8357
8358         mutex_init(&priv->mutex);
8359         if (pci_enable_device(pdev)) {
8360                 err = -ENODEV;
8361                 goto out_ieee80211_free_hw;
8362         }
8363
8364         pci_set_master(pdev);
8365
8366         iwl_clear_stations_table(priv);
8367
8368         priv->data_retry_limit = -1;
8369         priv->ieee_channels = NULL;
8370         priv->ieee_rates = NULL;
8371         priv->phymode = -1;
8372
8373         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8374         if (!err)
8375                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8376         if (err) {
8377                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8378                 goto out_pci_disable_device;
8379         }
8380
8381         pci_set_drvdata(pdev, priv);
8382         err = pci_request_regions(pdev, DRV_NAME);
8383         if (err)
8384                 goto out_pci_disable_device;
8385         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8386          * PCI Tx retries from interfering with C3 CPU state */
8387         pci_write_config_byte(pdev, 0x41, 0x00);
8388         priv->hw_base = pci_iomap(pdev, 0, 0);
8389         if (!priv->hw_base) {
8390                 err = -ENODEV;
8391                 goto out_pci_release_regions;
8392         }
8393
8394         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8395                         (unsigned long long) pci_resource_len(pdev, 0));
8396         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8397
8398         /* Initialize module parameter values here */
8399
8400         if (iwl_param_disable) {
8401                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8402                 IWL_DEBUG_INFO("Radio disabled.\n");
8403         }
8404
8405         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8406
8407         pci_id =
8408             (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
8409
8410         switch (pci_id) {
8411         case 0x42221005:        /* 0x4222 0x8086 0x1005 is BG SKU */
8412         case 0x42221034:        /* 0x4222 0x8086 0x1034 is BG SKU */
8413         case 0x42271014:        /* 0x4227 0x8086 0x1014 is BG SKU */
8414         case 0x42221044:        /* 0x4222 0x8086 0x1044 is BG SKU */
8415                 priv->is_abg = 0;
8416                 break;
8417
8418         /*
8419          * Rest are assumed ABG SKU -- if this is not the
8420          * case then the card will get the wrong 'Detected'
8421          * line in the kernel log however the code that
8422          * initializes the GEO table will detect no A-band
8423          * channels and remove the is_abg mask.
8424          */
8425         default:
8426                 priv->is_abg = 1;
8427                 break;
8428         }
8429
8430         printk(KERN_INFO DRV_NAME
8431                ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
8432                priv->is_abg ? "A" : "");
8433
8434         /* Device-specific setup */
8435         if (iwl_hw_set_hw_setting(priv)) {
8436                 IWL_ERROR("failed to set hw settings\n");
8437                 mutex_unlock(&priv->mutex);
8438                 goto out_iounmap;
8439         }
8440
8441 #ifdef CONFIG_IWLWIFI_QOS
8442         if (iwl_param_qos_enable)
8443                 priv->qos_data.qos_enable = 1;
8444
8445         iwl_reset_qos(priv);
8446
8447         priv->qos_data.qos_active = 0;
8448         priv->qos_data.qos_cap.val = 0;
8449 #endif /* CONFIG_IWLWIFI_QOS */
8450
8451         iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
8452         iwl_setup_deferred_work(priv);
8453         iwl_setup_rx_handlers(priv);
8454
8455         priv->rates_mask = IWL_RATES_MASK;
8456         /* If power management is turned on, default to AC mode */
8457         priv->power_mode = IWL_POWER_AC;
8458         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8459
8460         pci_enable_msi(pdev);
8461
8462         err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
8463         if (err) {
8464                 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
8465                 goto out_disable_msi;
8466         }
8467
8468         mutex_lock(&priv->mutex);
8469
8470         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
8471         if (err) {
8472                 IWL_ERROR("failed to create sysfs device attributes\n");
8473                 mutex_unlock(&priv->mutex);
8474                 goto out_release_irq;
8475         }
8476
8477         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
8478          * ucode filename and max sizes are card-specific. */
8479         err = iwl_read_ucode(priv);
8480         if (err) {
8481                 IWL_ERROR("Could not read microcode: %d\n", err);
8482                 mutex_unlock(&priv->mutex);
8483                 goto out_pci_alloc;
8484         }
8485
8486         mutex_unlock(&priv->mutex);
8487
8488         IWL_DEBUG_INFO("Queing UP work.\n");
8489
8490         queue_work(priv->workqueue, &priv->up);
8491
8492         return 0;
8493
8494  out_pci_alloc:
8495         iwl_dealloc_ucode_pci(priv);
8496
8497         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8498
8499  out_release_irq:
8500         free_irq(pdev->irq, priv);
8501
8502  out_disable_msi:
8503         pci_disable_msi(pdev);
8504         destroy_workqueue(priv->workqueue);
8505         priv->workqueue = NULL;
8506         iwl_unset_hw_setting(priv);
8507
8508  out_iounmap:
8509         pci_iounmap(pdev, priv->hw_base);
8510  out_pci_release_regions:
8511         pci_release_regions(pdev);
8512  out_pci_disable_device:
8513         pci_disable_device(pdev);
8514         pci_set_drvdata(pdev, NULL);
8515  out_ieee80211_free_hw:
8516         ieee80211_free_hw(priv->hw);
8517  out:
8518         return err;
8519 }
8520
8521 static void iwl_pci_remove(struct pci_dev *pdev)
8522 {
8523         struct iwl_priv *priv = pci_get_drvdata(pdev);
8524         struct list_head *p, *q;
8525         int i;
8526
8527         if (!priv)
8528                 return;
8529
8530         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8531
8532         mutex_lock(&priv->mutex);
8533         set_bit(STATUS_EXIT_PENDING, &priv->status);
8534         __iwl_down(priv);
8535         mutex_unlock(&priv->mutex);
8536
8537         /* Free MAC hash list for ADHOC */
8538         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8539                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8540                         list_del(p);
8541                         kfree(list_entry(p, struct iwl_ibss_seq, list));
8542                 }
8543         }
8544
8545         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8546
8547         iwl_dealloc_ucode_pci(priv);
8548
8549         if (priv->rxq.bd)
8550                 iwl_rx_queue_free(priv, &priv->rxq);
8551         iwl_hw_txq_ctx_free(priv);
8552
8553         iwl_unset_hw_setting(priv);
8554         iwl_clear_stations_table(priv);
8555
8556         if (priv->mac80211_registered) {
8557                 ieee80211_unregister_hw(priv->hw);
8558                 iwl_rate_control_unregister(priv->hw);
8559         }
8560
8561         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
8562          * priv->workqueue... so we can't take down the workqueue
8563          * until now... */
8564         destroy_workqueue(priv->workqueue);
8565         priv->workqueue = NULL;
8566
8567         free_irq(pdev->irq, priv);
8568         pci_disable_msi(pdev);
8569         pci_iounmap(pdev, priv->hw_base);
8570         pci_release_regions(pdev);
8571         pci_disable_device(pdev);
8572         pci_set_drvdata(pdev, NULL);
8573
8574         kfree(priv->channel_info);
8575
8576         kfree(priv->ieee_channels);
8577         kfree(priv->ieee_rates);
8578
8579         if (priv->ibss_beacon)
8580                 dev_kfree_skb(priv->ibss_beacon);
8581
8582         ieee80211_free_hw(priv->hw);
8583 }
8584
8585 #ifdef CONFIG_PM
8586
8587 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8588 {
8589         struct iwl_priv *priv = pci_get_drvdata(pdev);
8590
8591         mutex_lock(&priv->mutex);
8592
8593         set_bit(STATUS_IN_SUSPEND, &priv->status);
8594
8595         /* Take down the device; powers it off, etc. */
8596         __iwl_down(priv);
8597
8598         if (priv->mac80211_registered)
8599                 ieee80211_stop_queues(priv->hw);
8600
8601         pci_save_state(pdev);
8602         pci_disable_device(pdev);
8603         pci_set_power_state(pdev, PCI_D3hot);
8604
8605         mutex_unlock(&priv->mutex);
8606
8607         return 0;
8608 }
8609
8610 static void iwl_resume(struct iwl_priv *priv)
8611 {
8612         unsigned long flags;
8613
8614         /* The following it a temporary work around due to the
8615          * suspend / resume not fully initializing the NIC correctly.
8616          * Without all of the following, resume will not attempt to take
8617          * down the NIC (it shouldn't really need to) and will just try
8618          * and bring the NIC back up.  However that fails during the
8619          * ucode verification process.  This then causes iwl_down to be
8620          * called *after* iwl_hw_nic_init() has succeeded -- which
8621          * then lets the next init sequence succeed.  So, we've
8622          * replicated all of that NIC init code here... */
8623
8624         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8625
8626         iwl_hw_nic_init(priv);
8627
8628         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8629         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
8630                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
8631         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8632         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8633         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8634
8635         /* tell the device to stop sending interrupts */
8636         iwl_disable_interrupts(priv);
8637
8638         spin_lock_irqsave(&priv->lock, flags);
8639         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
8640
8641         if (!iwl_grab_restricted_access(priv)) {
8642                 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
8643                                          APMG_CLK_VAL_DMA_CLK_RQT);
8644                 iwl_release_restricted_access(priv);
8645         }
8646         spin_unlock_irqrestore(&priv->lock, flags);
8647
8648         udelay(5);
8649
8650         iwl_hw_nic_reset(priv);
8651
8652         /* Bring the device back up */
8653         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8654         queue_work(priv->workqueue, &priv->up);
8655 }
8656
8657 static int iwl_pci_resume(struct pci_dev *pdev)
8658 {
8659         struct iwl_priv *priv = pci_get_drvdata(pdev);
8660         int err;
8661
8662         printk(KERN_INFO "Coming out of suspend...\n");
8663
8664         mutex_lock(&priv->mutex);
8665
8666         pci_set_power_state(pdev, PCI_D0);
8667         err = pci_enable_device(pdev);
8668         pci_restore_state(pdev);
8669
8670         /*
8671          * Suspend/Resume resets the PCI configuration space, so we have to
8672          * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
8673          * from interfering with C3 CPU state. pci_restore_state won't help
8674          * here since it only restores the first 64 bytes pci config header.
8675          */
8676         pci_write_config_byte(pdev, 0x41, 0x00);
8677
8678         iwl_resume(priv);
8679         mutex_unlock(&priv->mutex);
8680
8681         return 0;
8682 }
8683
8684 #endif /* CONFIG_PM */
8685
8686 /*****************************************************************************
8687  *
8688  * driver and module entry point
8689  *
8690  *****************************************************************************/
8691
8692 static struct pci_driver iwl_driver = {
8693         .name = DRV_NAME,
8694         .id_table = iwl_hw_card_ids,
8695         .probe = iwl_pci_probe,
8696         .remove = __devexit_p(iwl_pci_remove),
8697 #ifdef CONFIG_PM
8698         .suspend = iwl_pci_suspend,
8699         .resume = iwl_pci_resume,
8700 #endif
8701 };
8702
8703 static int __init iwl_init(void)
8704 {
8705
8706         int ret;
8707         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8708         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8709         ret = pci_register_driver(&iwl_driver);
8710         if (ret) {
8711                 IWL_ERROR("Unable to initialize PCI module\n");
8712                 return ret;
8713         }
8714 #ifdef CONFIG_IWLWIFI_DEBUG
8715         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
8716         if (ret) {
8717                 IWL_ERROR("Unable to create driver sysfs file\n");
8718                 pci_unregister_driver(&iwl_driver);
8719                 return ret;
8720         }
8721 #endif
8722
8723         return ret;
8724 }
8725
8726 static void __exit iwl_exit(void)
8727 {
8728 #ifdef CONFIG_IWLWIFI_DEBUG
8729         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
8730 #endif
8731         pci_unregister_driver(&iwl_driver);
8732 }
8733
8734 module_param_named(antenna, iwl_param_antenna, int, 0444);
8735 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8736 module_param_named(disable, iwl_param_disable, int, 0444);
8737 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8738 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
8739 MODULE_PARM_DESC(hwcrypto,
8740                  "using hardware crypto engine (default 0 [software])\n");
8741 module_param_named(debug, iwl_param_debug, int, 0444);
8742 MODULE_PARM_DESC(debug, "debug output mask");
8743 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
8744 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8745
8746 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
8747 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8748
8749 /* QoS */
8750 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
8751 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8752
8753 module_exit(iwl_exit);
8754 module_init(iwl_init);