drivers/net/wireless/mwifiex/main.c

   1 /*
   2  * Marvell Wireless LAN device driver: major functions
   3  *
   4  * Copyright (C) 2011-2014, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "main.h"
  21 #include "wmm.h"
  22 #include "cfg80211.h"
  23 #include "11n.h"
  24
  25 #define VERSION "1.0"
  26
  27 const char driver_version[] = "mwifiex " VERSION " (%s) ";
  28 static char *cal_data_cfg;
  29 module_param(cal_data_cfg, charp, 0);
  30
  31 /*
  32  * This function registers the device and performs all the necessary
  33  * initializations.
  34  *
  35  * The following initialization operations are performed -
  36  *      - Allocate adapter structure
  37  *      - Save interface specific operations table in adapter
  38  *      - Call interface specific initialization routine
  39  *      - Allocate private structures
  40  *      - Set default adapter structure parameters
  41  *      - Initialize locks
  42  *
  43  * In case of any errors during inittialization, this function also ensures
  44  * proper cleanup before exiting.
  45  */
  46 static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops,
  47                             void **padapter)
  48 {
  49         struct mwifiex_adapter *adapter;
  50         int i;
  51
  52         adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
  53         if (!adapter)
  54                 return -ENOMEM;
  55
  56         *padapter = adapter;
  57         adapter->card = card;
  58
  59         /* Save interface specific operations in adapter */
  60         memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
  61
  62         /* card specific initialization has been deferred until now .. */
  63         if (adapter->if_ops.init_if)
  64                 if (adapter->if_ops.init_if(adapter))
  65                         goto error;
  66
  67         adapter->priv_num = 0;
  68
  69         for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
  70                 /* Allocate memory for private structure */
  71                 adapter->priv[i] =
  72                         kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
  73                 if (!adapter->priv[i])
  74                         goto error;
  75
  76                 adapter->priv[i]->adapter = adapter;
  77                 adapter->priv_num++;
  78         }
  79         mwifiex_init_lock_list(adapter);
  80
  81         init_timer(&adapter->cmd_timer);
  82         adapter->cmd_timer.function = mwifiex_cmd_timeout_func;
  83         adapter->cmd_timer.data = (unsigned long) adapter;
  84
  85         return 0;
  86
  87 error:
  88         dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n");
  89
  90         for (i = 0; i < adapter->priv_num; i++)
  91                 kfree(adapter->priv[i]);
  92
  93         kfree(adapter);
  94
  95         return -1;
  96 }
  97
  98 /*
  99  * This function unregisters the device and performs all the necessary
 100  * cleanups.
 101  *
 102  * The following cleanup operations are performed -
 103  *      - Free the timers
 104  *      - Free beacon buffers
 105  *      - Free private structures
 106  *      - Free adapter structure
 107  */
 108 static int mwifiex_unregister(struct mwifiex_adapter *adapter)
 109 {
 110         s32 i;
 111
 112         if (adapter->if_ops.cleanup_if)
 113                 adapter->if_ops.cleanup_if(adapter);
 114
 115         del_timer_sync(&adapter->cmd_timer);
 116
 117         /* Free private structures */
 118         for (i = 0; i < adapter->priv_num; i++) {
 119                 if (adapter->priv[i]) {
 120                         mwifiex_free_curr_bcn(adapter->priv[i]);
 121                         kfree(adapter->priv[i]);
 122                 }
 123         }
 124
 125         kfree(adapter);
 126         return 0;
 127 }
 128
 129 static int mwifiex_process_rx(struct mwifiex_adapter *adapter)
 130 {
 131         unsigned long flags;
 132         struct sk_buff *skb;
 133
 134         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 135         if (adapter->rx_processing || adapter->rx_locked) {
 136                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 137                 goto exit_rx_proc;
 138         } else {
 139                 adapter->rx_processing = true;
 140                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 141         }
 142
 143         /* Check for Rx data */
 144         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 145                 atomic_dec(&adapter->rx_pending);
 146                 if (adapter->delay_main_work &&
 147                     (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) {
 148                         adapter->delay_main_work = false;
 149                         queue_work(adapter->workqueue, &adapter->main_work);
 150                 }
 151                 mwifiex_handle_rx_packet(adapter, skb);
 152         }
 153         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 154         adapter->rx_processing = false;
 155         spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 156
 157 exit_rx_proc:
 158         return 0;
 159 }
 160
 161 /*
 162  * The main process.
 163  *
 164  * This function is the main procedure of the driver and handles various driver
 165  * operations. It runs in a loop and provides the core functionalities.
 166  *
 167  * The main responsibilities of this function are -
 168  *      - Ensure concurrency control
 169  *      - Handle pending interrupts and call interrupt handlers
 170  *      - Wake up the card if required
 171  *      - Handle command responses and call response handlers
 172  *      - Handle events and call event handlers
 173  *      - Execute pending commands
 174  *      - Transmit pending data packets
 175  */
 176 int mwifiex_main_process(struct mwifiex_adapter *adapter)
 177 {
 178         int ret = 0;
 179         unsigned long flags;
 180         struct sk_buff *skb;
 181
 182         spin_lock_irqsave(&adapter->main_proc_lock, flags);
 183
 184         /* Check if already processing */
 185         if (adapter->mwifiex_processing) {
 186                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 187                 goto exit_main_proc;
 188         } else {
 189                 adapter->mwifiex_processing = true;
 190                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 191         }
 192 process_start:
 193         do {
 194                 if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
 195                     (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
 196                         break;
 197
 198                 /* If we process interrupts first, it would increase RX pending
 199                  * even further. Avoid this by checking if rx_pending has
 200                  * crossed high threshold and schedule rx work queue
 201                  * and then process interrupts
 202                  */
 203                 if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING) {
 204                         adapter->delay_main_work = true;
 205                         if (!adapter->rx_processing)
 206                                 queue_work(adapter->rx_workqueue,
 207                                            &adapter->rx_work);
 208                         break;
 209                 }
 210
 211                 /* Handle pending interrupt if any */
 212                 if (adapter->int_status) {
 213                         if (adapter->hs_activated)
 214                                 mwifiex_process_hs_config(adapter);
 215                         if (adapter->if_ops.process_int_status)
 216                                 adapter->if_ops.process_int_status(adapter);
 217                 }
 218
 219                 if (adapter->rx_work_enabled && adapter->data_received)
 220                         queue_work(adapter->rx_workqueue, &adapter->rx_work);
 221
 222                 /* Need to wake up the card ? */
 223                 if ((adapter->ps_state == PS_STATE_SLEEP) &&
 224                     (adapter->pm_wakeup_card_req &&
 225                      !adapter->pm_wakeup_fw_try) &&
 226                     (is_command_pending(adapter) ||
 227                      !mwifiex_wmm_lists_empty(adapter))) {
 228                         adapter->pm_wakeup_fw_try = true;
 229                         adapter->if_ops.wakeup(adapter);
 230                         continue;
 231                 }
 232
 233                 if (IS_CARD_RX_RCVD(adapter)) {
 234                         adapter->data_received = false;
 235                         adapter->pm_wakeup_fw_try = false;
 236                         if (adapter->ps_state == PS_STATE_SLEEP)
 237                                 adapter->ps_state = PS_STATE_AWAKE;
 238                 } else {
 239                         /* We have tried to wakeup the card already */
 240                         if (adapter->pm_wakeup_fw_try)
 241                                 break;
 242                         if (adapter->ps_state != PS_STATE_AWAKE ||
 243                             adapter->tx_lock_flag)
 244                                 break;
 245
 246                         if ((!adapter->scan_chan_gap_enabled &&
 247                              adapter->scan_processing) || adapter->data_sent ||
 248                             mwifiex_wmm_lists_empty(adapter)) {
 249                                 if (adapter->cmd_sent || adapter->curr_cmd ||
 250                                     (!is_command_pending(adapter)))
 251                                         break;
 252                         }
 253                 }
 254
 255                 /* Check Rx data for USB */
 256                 if (adapter->iface_type == MWIFIEX_USB)
 257                         while ((skb = skb_dequeue(&adapter->usb_rx_data_q)))
 258                                 mwifiex_handle_rx_packet(adapter, skb);
 259
 260                 /* Check for event */
 261                 if (adapter->event_received) {
 262                         adapter->event_received = false;
 263                         mwifiex_process_event(adapter);
 264                 }
 265
 266                 /* Check for Cmd Resp */
 267                 if (adapter->cmd_resp_received) {
 268                         adapter->cmd_resp_received = false;
 269                         mwifiex_process_cmdresp(adapter);
 270
 271                         /* call mwifiex back when init_fw is done */
 272                         if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
 273                                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 274                                 mwifiex_init_fw_complete(adapter);
 275                         }
 276                 }
 277
 278                 /* Check if we need to confirm Sleep Request
 279                    received previously */
 280                 if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
 281                         if (!adapter->cmd_sent && !adapter->curr_cmd)
 282                                 mwifiex_check_ps_cond(adapter);
 283                 }
 284
 285                 /* * The ps_state may have been changed during processing of
 286                  * Sleep Request event.
 287                  */
 288                 if ((adapter->ps_state == PS_STATE_SLEEP) ||
 289                     (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
 290                     (adapter->ps_state == PS_STATE_SLEEP_CFM) ||
 291                     adapter->tx_lock_flag)
 292                         continue;
 293
 294                 if (!adapter->cmd_sent && !adapter->curr_cmd) {
 295                         if (mwifiex_exec_next_cmd(adapter) == -1) {
 296                                 ret = -1;
 297                                 break;
 298                         }
 299                 }
 300
 301                 if ((adapter->scan_chan_gap_enabled ||
 302                      !adapter->scan_processing) &&
 303                     !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter)) {
 304                         mwifiex_wmm_process_tx(adapter);
 305                         if (adapter->hs_activated) {
 306                                 adapter->is_hs_configured = false;
 307                                 mwifiex_hs_activated_event
 308                                         (mwifiex_get_priv
 309                                          (adapter, MWIFIEX_BSS_ROLE_ANY),
 310                                          false);
 311                         }
 312                 }
 313
 314                 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
 315                     !adapter->curr_cmd && !is_command_pending(adapter) &&
 316                     mwifiex_wmm_lists_empty(adapter)) {
 317                         if (!mwifiex_send_null_packet
 318                             (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
 319                              MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 320                              MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
 321                                 adapter->delay_null_pkt = false;
 322                                 adapter->ps_state = PS_STATE_SLEEP;
 323                         }
 324                         break;
 325                 }
 326         } while (true);
 327
 328         spin_lock_irqsave(&adapter->main_proc_lock, flags);
 329         if (!adapter->delay_main_work &&
 330             (adapter->int_status || IS_CARD_RX_RCVD(adapter))) {
 331                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 332                 goto process_start;
 333         }
 334
 335         adapter->mwifiex_processing = false;
 336         spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 337
 338 exit_main_proc:
 339         if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
 340                 mwifiex_shutdown_drv(adapter);
 341         return ret;
 342 }
 343 EXPORT_SYMBOL_GPL(mwifiex_main_process);
 344
 345 /*
 346  * This function frees the adapter structure.
 347  *
 348  * Additionally, this closes the netlink socket, frees the timers
 349  * and private structures.
 350  */
 351 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
 352 {
 353         if (!adapter) {
 354                 pr_err("%s: adapter is NULL\n", __func__);
 355                 return;
 356         }
 357
 358         mwifiex_unregister(adapter);
 359         pr_debug("info: %s: free adapter\n", __func__);
 360 }
 361
 362 /*
 363  * This function cancels all works in the queue and destroys
 364  * the main workqueue.
 365  */
 366 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
 367 {
 368         flush_workqueue(adapter->workqueue);
 369         destroy_workqueue(adapter->workqueue);
 370         adapter->workqueue = NULL;
 371
 372         if (adapter->rx_workqueue) {
 373                 flush_workqueue(adapter->rx_workqueue);
 374                 destroy_workqueue(adapter->rx_workqueue);
 375                 adapter->rx_workqueue = NULL;
 376         }
 377 }
 378
 379 /*
 380  * This function gets firmware and initializes it.
 381  *
 382  * The main initialization steps followed are -
 383  *      - Download the correct firmware to card
 384  *      - Issue the init commands to firmware
 385  */
 386 static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
 387 {
 388         int ret;
 389         char fmt[64];
 390         struct mwifiex_private *priv;
 391         struct mwifiex_adapter *adapter = context;
 392         struct mwifiex_fw_image fw;
 393         struct semaphore *sem = adapter->card_sem;
 394         bool init_failed = false;
 395         struct wireless_dev *wdev;
 396
 397         if (!firmware) {
 398                 dev_err(adapter->dev,
 399                         "Failed to get firmware %s\n", adapter->fw_name);
 400                 goto err_dnld_fw;
 401         }
 402
 403         memset(&fw, 0, sizeof(struct mwifiex_fw_image));
 404         adapter->firmware = firmware;
 405         fw.fw_buf = (u8 *) adapter->firmware->data;
 406         fw.fw_len = adapter->firmware->size;
 407
 408         if (adapter->if_ops.dnld_fw)
 409                 ret = adapter->if_ops.dnld_fw(adapter, &fw);
 410         else
 411                 ret = mwifiex_dnld_fw(adapter, &fw);
 412         if (ret == -1)
 413                 goto err_dnld_fw;
 414
 415         dev_notice(adapter->dev, "WLAN FW is active\n");
 416
 417         if (cal_data_cfg) {
 418                 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
 419                                       adapter->dev)) < 0)
 420                         dev_err(adapter->dev,
 421                                 "Cal data request_firmware() failed\n");
 422         }
 423
 424         /* enable host interrupt after fw dnld is successful */
 425         if (adapter->if_ops.enable_int) {
 426                 if (adapter->if_ops.enable_int(adapter))
 427                         goto err_dnld_fw;
 428         }
 429
 430         adapter->init_wait_q_woken = false;
 431         ret = mwifiex_init_fw(adapter);
 432         if (ret == -1) {
 433                 goto err_init_fw;
 434         } else if (!ret) {
 435                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 436                 goto done;
 437         }
 438         /* Wait for mwifiex_init to complete */
 439         wait_event_interruptible(adapter->init_wait_q,
 440                                  adapter->init_wait_q_woken);
 441         if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
 442                 goto err_init_fw;
 443
 444         priv = adapter->priv[MWIFIEX_BSS_ROLE_STA];
 445         if (mwifiex_register_cfg80211(adapter)) {
 446                 dev_err(adapter->dev, "cannot register with cfg80211\n");
 447                 goto err_init_fw;
 448         }
 449
 450         rtnl_lock();
 451         /* Create station interface by default */
 452         wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d",
 453                                         NL80211_IFTYPE_STATION, NULL, NULL);
 454         if (IS_ERR(wdev)) {
 455                 dev_err(adapter->dev, "cannot create default STA interface\n");
 456                 rtnl_unlock();
 457                 goto err_add_intf;
 458         }
 459         rtnl_unlock();
 460
 461         mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
 462         dev_notice(adapter->dev, "driver_version = %s\n", fmt);
 463         goto done;
 464
 465 err_add_intf:
 466         wiphy_unregister(adapter->wiphy);
 467         wiphy_free(adapter->wiphy);
 468 err_init_fw:
 469         if (adapter->if_ops.disable_int)
 470                 adapter->if_ops.disable_int(adapter);
 471 err_dnld_fw:
 472         pr_debug("info: %s: unregister device\n", __func__);
 473         if (adapter->if_ops.unregister_dev)
 474                 adapter->if_ops.unregister_dev(adapter);
 475
 476         if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
 477             (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
 478                 pr_debug("info: %s: shutdown mwifiex\n", __func__);
 479                 adapter->init_wait_q_woken = false;
 480
 481                 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
 482                         wait_event_interruptible(adapter->init_wait_q,
 483                                                  adapter->init_wait_q_woken);
 484         }
 485         adapter->surprise_removed = true;
 486         mwifiex_terminate_workqueue(adapter);
 487         init_failed = true;
 488 done:
 489         if (adapter->cal_data) {
 490                 release_firmware(adapter->cal_data);
 491                 adapter->cal_data = NULL;
 492         }
 493         if (adapter->firmware) {
 494                 release_firmware(adapter->firmware);
 495                 adapter->firmware = NULL;
 496         }
 497         if (init_failed)
 498                 mwifiex_free_adapter(adapter);
 499         up(sem);
 500         return;
 501 }
 502
 503 /*
 504  * This function initializes the hardware and gets firmware.
 505  */
 506 static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter)
 507 {
 508         int ret;
 509
 510         ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
 511                                       adapter->dev, GFP_KERNEL, adapter,
 512                                       mwifiex_fw_dpc);
 513         if (ret < 0)
 514                 dev_err(adapter->dev,
 515                         "request_firmware_nowait() returned error %d\n", ret);
 516         return ret;
 517 }
 518
 519 /*
 520  * CFG802.11 network device handler for open.
 521  *
 522  * Starts the data queue.
 523  */
 524 static int
 525 mwifiex_open(struct net_device *dev)
 526 {
 527         netif_tx_start_all_queues(dev);
 528         return 0;
 529 }
 530
 531 /*
 532  * CFG802.11 network device handler for close.
 533  */
 534 static int
 535 mwifiex_close(struct net_device *dev)
 536 {
 537         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 538
 539         if (priv->scan_request) {
 540                 dev_dbg(priv->adapter->dev, "aborting scan on ndo_stop\n");
 541                 cfg80211_scan_done(priv->scan_request, 1);
 542                 priv->scan_request = NULL;
 543                 priv->scan_aborting = true;
 544         }
 545
 546         return 0;
 547 }
 548
 549 /*
 550  * Add buffer into wmm tx queue and queue work to transmit it.
 551  */
 552 int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
 553 {
 554         struct netdev_queue *txq;
 555         int index = mwifiex_1d_to_wmm_queue[skb->priority];
 556
 557         if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
 558                 txq = netdev_get_tx_queue(priv->netdev, index);
 559                 if (!netif_tx_queue_stopped(txq)) {
 560                         netif_tx_stop_queue(txq);
 561                         dev_dbg(priv->adapter->dev, "stop queue: %d\n", index);
 562                 }
 563         }
 564
 565         atomic_inc(&priv->adapter->tx_pending);
 566         mwifiex_wmm_add_buf_txqueue(priv, skb);
 567
 568         queue_work(priv->adapter->workqueue, &priv->adapter->main_work);
 569
 570         return 0;
 571 }
 572
 573 /*
 574  * CFG802.11 network device handler for data transmission.
 575  */
 576 static int
 577 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 578 {
 579         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 580         struct sk_buff *new_skb;
 581         struct mwifiex_txinfo *tx_info;
 582
 583         dev_dbg(priv->adapter->dev, "data: %lu BSS(%d-%d): Data <= kernel\n",
 584                 jiffies, priv->bss_type, priv->bss_num);
 585
 586         if (priv->adapter->surprise_removed) {
 587                 kfree_skb(skb);
 588                 priv->stats.tx_dropped++;
 589                 return 0;
 590         }
 591         if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
 592                 dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len);
 593                 kfree_skb(skb);
 594                 priv->stats.tx_dropped++;
 595                 return 0;
 596         }
 597         if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
 598                 dev_dbg(priv->adapter->dev,
 599                         "data: Tx: insufficient skb headroom %d\n",
 600                         skb_headroom(skb));
 601                 /* Insufficient skb headroom - allocate a new skb */
 602                 new_skb =
 603                         skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
 604                 if (unlikely(!new_skb)) {
 605                         dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n");
 606                         kfree_skb(skb);
 607                         priv->stats.tx_dropped++;
 608                         return 0;
 609                 }
 610                 kfree_skb(skb);
 611                 skb = new_skb;
 612                 dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n",
 613                         skb_headroom(skb));
 614         }
 615
 616         tx_info = MWIFIEX_SKB_TXCB(skb);
 617         memset(tx_info, 0, sizeof(*tx_info));
 618         tx_info->bss_num = priv->bss_num;
 619         tx_info->bss_type = priv->bss_type;
 620         tx_info->pkt_len = skb->len;
 621
 622         /* Record the current time the packet was queued; used to
 623          * determine the amount of time the packet was queued in
 624          * the driver before it was sent to the firmware.
 625          * The delay is then sent along with the packet to the
 626          * firmware for aggregate delay calculation for stats and
 627          * MSDU lifetime expiry.
 628          */
 629         __net_timestamp(skb);
 630
 631         mwifiex_queue_tx_pkt(priv, skb);
 632
 633         return 0;
 634 }
 635
 636 /*
 637  * CFG802.11 network device handler for setting MAC address.
 638  */
 639 static int
 640 mwifiex_set_mac_address(struct net_device *dev, void *addr)
 641 {
 642         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 643         struct sockaddr *hw_addr = addr;
 644         int ret;
 645
 646         memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
 647
 648         /* Send request to firmware */
 649         ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
 650                                HostCmd_ACT_GEN_SET, 0, NULL, true);
 651
 652         if (!ret)
 653                 memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
 654         else
 655                 dev_err(priv->adapter->dev,
 656                         "set mac address failed: ret=%d\n", ret);
 657
 658         memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
 659
 660         return ret;
 661 }
 662
 663 /*
 664  * CFG802.11 network device handler for setting multicast list.
 665  */
 666 static void mwifiex_set_multicast_list(struct net_device *dev)
 667 {
 668         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 669         struct mwifiex_multicast_list mcast_list;
 670
 671         if (dev->flags & IFF_PROMISC) {
 672                 mcast_list.mode = MWIFIEX_PROMISC_MODE;
 673         } else if (dev->flags & IFF_ALLMULTI ||
 674                    netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
 675                 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
 676         } else {
 677                 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
 678                 mcast_list.num_multicast_addr =
 679                         mwifiex_copy_mcast_addr(&mcast_list, dev);
 680         }
 681         mwifiex_request_set_multicast_list(priv, &mcast_list);
 682 }
 683
 684 /*
 685  * CFG802.11 network device handler for transmission timeout.
 686  */
 687 static void
 688 mwifiex_tx_timeout(struct net_device *dev)
 689 {
 690         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 691
 692         priv->num_tx_timeout++;
 693         priv->tx_timeout_cnt++;
 694         dev_err(priv->adapter->dev,
 695                 "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
 696                 jiffies, priv->tx_timeout_cnt, priv->bss_type, priv->bss_num);
 697         mwifiex_set_trans_start(dev);
 698
 699         if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
 700             priv->adapter->if_ops.card_reset) {
 701                 dev_err(priv->adapter->dev,
 702                         "tx_timeout_cnt exceeds threshold. Triggering card reset!\n");
 703                 priv->adapter->if_ops.card_reset(priv->adapter);
 704         }
 705 }
 706
 707 /*
 708  * CFG802.11 network device handler for statistics retrieval.
 709  */
 710 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
 711 {
 712         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 713
 714         return &priv->stats;
 715 }
 716
 717 static u16
 718 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
 719                                 void *accel_priv, select_queue_fallback_t fallback)
 720 {
 721         skb->priority = cfg80211_classify8021d(skb, NULL);
 722         return mwifiex_1d_to_wmm_queue[skb->priority];
 723 }
 724
 725 /* Network device handlers */
 726 static const struct net_device_ops mwifiex_netdev_ops = {
 727         .ndo_open = mwifiex_open,
 728         .ndo_stop = mwifiex_close,
 729         .ndo_start_xmit = mwifiex_hard_start_xmit,
 730         .ndo_set_mac_address = mwifiex_set_mac_address,
 731         .ndo_tx_timeout = mwifiex_tx_timeout,
 732         .ndo_get_stats = mwifiex_get_stats,
 733         .ndo_set_rx_mode = mwifiex_set_multicast_list,
 734         .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
 735 };
 736
 737 /*
 738  * This function initializes the private structure parameters.
 739  *
 740  * The following wait queues are initialized -
 741  *      - IOCTL wait queue
 742  *      - Command wait queue
 743  *      - Statistics wait queue
 744  *
 745  * ...and the following default parameters are set -
 746  *      - Current key index     : Set to 0
 747  *      - Rate index            : Set to auto
 748  *      - Media connected       : Set to disconnected
 749  *      - Adhoc link sensed     : Set to false
 750  *      - Nick name             : Set to null
 751  *      - Number of Tx timeout  : Set to 0
 752  *      - Device address        : Set to current address
 753  *
 754  * In addition, the CFG80211 work queue is also created.
 755  */
 756 void mwifiex_init_priv_params(struct mwifiex_private *priv,
 757                                                 struct net_device *dev)
 758 {
 759         dev->netdev_ops = &mwifiex_netdev_ops;
 760         dev->destructor = free_netdev;
 761         /* Initialize private structure */
 762         priv->current_key_index = 0;
 763         priv->media_connected = false;
 764         memset(&priv->nick_name, 0, sizeof(priv->nick_name));
 765         memset(priv->mgmt_ie, 0,
 766                sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
 767         priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
 768         priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
 769         priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
 770         priv->rsn_idx = MWIFIEX_AUTO_IDX_MASK;
 771         priv->num_tx_timeout = 0;
 772         memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
 773 }
 774
 775 /*
 776  * This function check if command is pending.
 777  */
 778 int is_command_pending(struct mwifiex_adapter *adapter)
 779 {
 780         unsigned long flags;
 781         int is_cmd_pend_q_empty;
 782
 783         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 784         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 785         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 786
 787         return !is_cmd_pend_q_empty;
 788 }
 789
 790 /*
 791  * This is the RX work queue function.
 792  *
 793  * It handles the RX operations.
 794  */
 795 static void mwifiex_rx_work_queue(struct work_struct *work)
 796 {
 797         struct mwifiex_adapter *adapter =
 798                 container_of(work, struct mwifiex_adapter, rx_work);
 799
 800         if (adapter->surprise_removed)
 801                 return;
 802         mwifiex_process_rx(adapter);
 803 }
 804
 805 /*
 806  * This is the main work queue function.
 807  *
 808  * It handles the main process, which in turn handles the complete
 809  * driver operations.
 810  */
 811 static void mwifiex_main_work_queue(struct work_struct *work)
 812 {
 813         struct mwifiex_adapter *adapter =
 814                 container_of(work, struct mwifiex_adapter, main_work);
 815
 816         if (adapter->surprise_removed)
 817                 return;
 818         mwifiex_main_process(adapter);
 819 }
 820
 821 /*
 822  * This function adds the card.
 823  *
 824  * This function follows the following major steps to set up the device -
 825  *      - Initialize software. This includes probing the card, registering
 826  *        the interface operations table, and allocating/initializing the
 827  *        adapter structure
 828  *      - Set up the netlink socket
 829  *      - Create and start the main work queue
 830  *      - Register the device
 831  *      - Initialize firmware and hardware
 832  *      - Add logical interfaces
 833  */
 834 int
 835 mwifiex_add_card(void *card, struct semaphore *sem,
 836                  struct mwifiex_if_ops *if_ops, u8 iface_type)
 837 {
 838         struct mwifiex_adapter *adapter;
 839
 840         if (down_interruptible(sem))
 841                 goto exit_sem_err;
 842
 843         if (mwifiex_register(card, if_ops, (void **)&adapter)) {
 844                 pr_err("%s: software init failed\n", __func__);
 845                 goto err_init_sw;
 846         }
 847
 848         adapter->iface_type = iface_type;
 849         adapter->card_sem = sem;
 850
 851         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 852         adapter->surprise_removed = false;
 853         init_waitqueue_head(&adapter->init_wait_q);
 854         adapter->is_suspended = false;
 855         adapter->hs_activated = false;
 856         init_waitqueue_head(&adapter->hs_activate_wait_q);
 857         init_waitqueue_head(&adapter->cmd_wait_q.wait);
 858         adapter->cmd_wait_q.status = 0;
 859         adapter->scan_wait_q_woken = false;
 860
 861         if (num_possible_cpus() > 1) {
 862                 adapter->rx_work_enabled = true;
 863                 pr_notice("rx work enabled, cpus %d\n", num_possible_cpus());
 864         }
 865
 866         adapter->workqueue =
 867                 alloc_workqueue("MWIFIEX_WORK_QUEUE",
 868                                 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
 869         if (!adapter->workqueue)
 870                 goto err_kmalloc;
 871
 872         INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
 873
 874         if (adapter->rx_work_enabled) {
 875                 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
 876                                                         WQ_HIGHPRI |
 877                                                         WQ_MEM_RECLAIM |
 878                                                         WQ_UNBOUND, 1);
 879                 if (!adapter->rx_workqueue)
 880                         goto err_kmalloc;
 881
 882                 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
 883         }
 884
 885         if (adapter->if_ops.iface_work)
 886                 INIT_WORK(&adapter->iface_work, adapter->if_ops.iface_work);
 887
 888         /* Register the device. Fill up the private data structure with relevant
 889            information from the card. */
 890         if (adapter->if_ops.register_dev(adapter)) {
 891                 pr_err("%s: failed to register mwifiex device\n", __func__);
 892                 goto err_registerdev;
 893         }
 894
 895         if (mwifiex_init_hw_fw(adapter)) {
 896                 pr_err("%s: firmware init failed\n", __func__);
 897                 goto err_init_fw;
 898         }
 899
 900         return 0;
 901
 902 err_init_fw:
 903         pr_debug("info: %s: unregister device\n", __func__);
 904         if (adapter->if_ops.unregister_dev)
 905                 adapter->if_ops.unregister_dev(adapter);
 906         if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
 907             (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
 908                 pr_debug("info: %s: shutdown mwifiex\n", __func__);
 909                 adapter->init_wait_q_woken = false;
 910
 911                 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
 912                         wait_event_interruptible(adapter->init_wait_q,
 913                                                  adapter->init_wait_q_woken);
 914         }
 915 err_registerdev:
 916         adapter->surprise_removed = true;
 917         mwifiex_terminate_workqueue(adapter);
 918 err_kmalloc:
 919         mwifiex_free_adapter(adapter);
 920
 921 err_init_sw:
 922         up(sem);
 923
 924 exit_sem_err:
 925         return -1;
 926 }
 927 EXPORT_SYMBOL_GPL(mwifiex_add_card);
 928
 929 /*
 930  * This function removes the card.
 931  *
 932  * This function follows the following major steps to remove the device -
 933  *      - Stop data traffic
 934  *      - Shutdown firmware
 935  *      - Remove the logical interfaces
 936  *      - Terminate the work queue
 937  *      - Unregister the device
 938  *      - Free the adapter structure
 939  */
 940 int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
 941 {
 942         struct mwifiex_private *priv = NULL;
 943         int i;
 944
 945         if (down_interruptible(sem))
 946                 goto exit_sem_err;
 947
 948         if (!adapter)
 949                 goto exit_remove;
 950
 951         /* We can no longer handle interrupts once we start doing the teardown
 952          * below. */
 953         if (adapter->if_ops.disable_int)
 954                 adapter->if_ops.disable_int(adapter);
 955
 956         adapter->surprise_removed = true;
 957
 958         /* Stop data */
 959         for (i = 0; i < adapter->priv_num; i++) {
 960                 priv = adapter->priv[i];
 961                 if (priv && priv->netdev) {
 962                         mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 963                         if (netif_carrier_ok(priv->netdev))
 964                                 netif_carrier_off(priv->netdev);
 965                 }
 966         }
 967
 968         dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n");
 969         adapter->init_wait_q_woken = false;
 970
 971         if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
 972                 wait_event_interruptible(adapter->init_wait_q,
 973                                          adapter->init_wait_q_woken);
 974         dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n");
 975         if (atomic_read(&adapter->rx_pending) ||
 976             atomic_read(&adapter->tx_pending) ||
 977             atomic_read(&adapter->cmd_pending)) {
 978                 dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, "
 979                        "cmd_pending=%d\n",
 980                        atomic_read(&adapter->rx_pending),
 981                        atomic_read(&adapter->tx_pending),
 982                        atomic_read(&adapter->cmd_pending));
 983         }
 984
 985         for (i = 0; i < adapter->priv_num; i++) {
 986                 priv = adapter->priv[i];
 987
 988                 if (!priv)
 989                         continue;
 990
 991                 rtnl_lock();
 992                 if (priv->wdev && priv->netdev)
 993                         mwifiex_del_virtual_intf(adapter->wiphy, priv->wdev);
 994                 rtnl_unlock();
 995         }
 996
 997         wiphy_unregister(adapter->wiphy);
 998         wiphy_free(adapter->wiphy);
 999
1000         mwifiex_terminate_workqueue(adapter);
1001
1002         /* Unregister device */
1003         dev_dbg(adapter->dev, "info: unregister device\n");
1004         if (adapter->if_ops.unregister_dev)
1005                 adapter->if_ops.unregister_dev(adapter);
1006         /* Free adapter structure */
1007         dev_dbg(adapter->dev, "info: free adapter\n");
1008         mwifiex_free_adapter(adapter);
1009
1010 exit_remove:
1011         up(sem);
1012 exit_sem_err:
1013         return 0;
1014 }
1015 EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1016
1017 /*
1018  * This function initializes the module.
1019  *
1020  * The debug FS is also initialized if configured.
1021  */
1022 static int
1023 mwifiex_init_module(void)
1024 {
1025 #ifdef CONFIG_DEBUG_FS
1026         mwifiex_debugfs_init();
1027 #endif
1028         return 0;
1029 }
1030
1031 /*
1032  * This function cleans up the module.
1033  *
1034  * The debug FS is removed if available.
1035  */
1036 static void
1037 mwifiex_cleanup_module(void)
1038 {
1039 #ifdef CONFIG_DEBUG_FS
1040         mwifiex_debugfs_remove();
1041 #endif
1042 }
1043
1044 module_init(mwifiex_init_module);
1045 module_exit(mwifiex_cleanup_module);
1046
1047 MODULE_AUTHOR("Marvell International Ltd.");
1048 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1049 MODULE_VERSION(VERSION);
1050 MODULE_LICENSE("GPL v2");