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