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 static unsigned int debug_mask = MWIFIEX_DEFAULT_DEBUG_MASK;
  28 module_param(debug_mask, uint, 0);
  29 MODULE_PARM_DESC(debug_mask, "bitmap for debug flags");
  30
  31 const char driver_version[] = "mwifiex " VERSION " (%s) ";
  32 static char *cal_data_cfg;
  33 module_param(cal_data_cfg, charp, 0);
  34
  35 static unsigned short driver_mode;
  36 module_param(driver_mode, ushort, 0);
  37 MODULE_PARM_DESC(driver_mode,
  38                  "station=0x1(default), ap-sta=0x3, station-p2p=0x5, ap-sta-p2p=0x7");
  39
  40 /*
  41  * This function registers the device and performs all the necessary
  42  * initializations.
  43  *
  44  * The following initialization operations are performed -
  45  *      - Allocate adapter structure
  46  *      - Save interface specific operations table in adapter
  47  *      - Call interface specific initialization routine
  48  *      - Allocate private structures
  49  *      - Set default adapter structure parameters
  50  *      - Initialize locks
  51  *
  52  * In case of any errors during inittialization, this function also ensures
  53  * proper cleanup before exiting.
  54  */
  55 static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops,
  56                             void **padapter)
  57 {
  58         struct mwifiex_adapter *adapter;
  59         int i;
  60
  61         adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
  62         if (!adapter)
  63                 return -ENOMEM;
  64
  65         *padapter = adapter;
  66         adapter->card = card;
  67
  68         /* Save interface specific operations in adapter */
  69         memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
  70         adapter->debug_mask = debug_mask;
  71
  72         /* card specific initialization has been deferred until now .. */
  73         if (adapter->if_ops.init_if)
  74                 if (adapter->if_ops.init_if(adapter))
  75                         goto error;
  76
  77         adapter->priv_num = 0;
  78
  79         for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
  80                 /* Allocate memory for private structure */
  81                 adapter->priv[i] =
  82                         kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
  83                 if (!adapter->priv[i])
  84                         goto error;
  85
  86                 adapter->priv[i]->adapter = adapter;
  87                 adapter->priv_num++;
  88         }
  89         mwifiex_init_lock_list(adapter);
  90
  91         setup_timer(&adapter->cmd_timer, mwifiex_cmd_timeout_func,
  92                     (unsigned long)adapter);
  93
  94         return 0;
  95
  96 error:
  97         mwifiex_dbg(adapter, ERROR,
  98                     "info: leave mwifiex_register with error\n");
  99
 100         for (i = 0; i < adapter->priv_num; i++)
 101                 kfree(adapter->priv[i]);
 102
 103         kfree(adapter);
 104
 105         return -1;
 106 }
 107
 108 /*
 109  * This function unregisters the device and performs all the necessary
 110  * cleanups.
 111  *
 112  * The following cleanup operations are performed -
 113  *      - Free the timers
 114  *      - Free beacon buffers
 115  *      - Free private structures
 116  *      - Free adapter structure
 117  */
 118 static int mwifiex_unregister(struct mwifiex_adapter *adapter)
 119 {
 120         s32 i;
 121
 122         if (adapter->if_ops.cleanup_if)
 123                 adapter->if_ops.cleanup_if(adapter);
 124
 125         del_timer_sync(&adapter->cmd_timer);
 126
 127         /* Free private structures */
 128         for (i = 0; i < adapter->priv_num; i++) {
 129                 if (adapter->priv[i]) {
 130                         mwifiex_free_curr_bcn(adapter->priv[i]);
 131                         kfree(adapter->priv[i]);
 132                 }
 133         }
 134
 135         vfree(adapter->chan_stats);
 136         kfree(adapter);
 137         return 0;
 138 }
 139
 140 void mwifiex_queue_main_work(struct mwifiex_adapter *adapter)
 141 {
 142         unsigned long flags;
 143
 144         spin_lock_irqsave(&adapter->main_proc_lock, flags);
 145         if (adapter->mwifiex_processing) {
 146                 adapter->more_task_flag = true;
 147                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 148         } else {
 149                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 150                 queue_work(adapter->workqueue, &adapter->main_work);
 151         }
 152 }
 153 EXPORT_SYMBOL_GPL(mwifiex_queue_main_work);
 154
 155 static void mwifiex_queue_rx_work(struct mwifiex_adapter *adapter)
 156 {
 157         unsigned long flags;
 158
 159         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 160         if (adapter->rx_processing) {
 161                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 162         } else {
 163                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 164                 queue_work(adapter->rx_workqueue, &adapter->rx_work);
 165         }
 166 }
 167
 168 static int mwifiex_process_rx(struct mwifiex_adapter *adapter)
 169 {
 170         unsigned long flags;
 171         struct sk_buff *skb;
 172         struct mwifiex_rxinfo *rx_info;
 173
 174         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 175         if (adapter->rx_processing || adapter->rx_locked) {
 176                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 177                 goto exit_rx_proc;
 178         } else {
 179                 adapter->rx_processing = true;
 180                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 181         }
 182
 183         /* Check for Rx data */
 184         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 185                 atomic_dec(&adapter->rx_pending);
 186                 if ((adapter->delay_main_work ||
 187                      adapter->iface_type == MWIFIEX_USB) &&
 188                     (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) {
 189                         if (adapter->if_ops.submit_rem_rx_urbs)
 190                                 adapter->if_ops.submit_rem_rx_urbs(adapter);
 191                         adapter->delay_main_work = false;
 192                         mwifiex_queue_main_work(adapter);
 193                 }
 194                 rx_info = MWIFIEX_SKB_RXCB(skb);
 195                 if (rx_info->buf_type == MWIFIEX_TYPE_AGGR_DATA) {
 196                         if (adapter->if_ops.deaggr_pkt)
 197                                 adapter->if_ops.deaggr_pkt(adapter, skb);
 198                         dev_kfree_skb_any(skb);
 199                 } else {
 200                         mwifiex_handle_rx_packet(adapter, skb);
 201                 }
 202         }
 203         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 204         adapter->rx_processing = false;
 205         spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 206
 207 exit_rx_proc:
 208         return 0;
 209 }
 210
 211 /*
 212  * The main process.
 213  *
 214  * This function is the main procedure of the driver and handles various driver
 215  * operations. It runs in a loop and provides the core functionalities.
 216  *
 217  * The main responsibilities of this function are -
 218  *      - Ensure concurrency control
 219  *      - Handle pending interrupts and call interrupt handlers
 220  *      - Wake up the card if required
 221  *      - Handle command responses and call response handlers
 222  *      - Handle events and call event handlers
 223  *      - Execute pending commands
 224  *      - Transmit pending data packets
 225  */
 226 int mwifiex_main_process(struct mwifiex_adapter *adapter)
 227 {
 228         int ret = 0;
 229         unsigned long flags;
 230
 231         spin_lock_irqsave(&adapter->main_proc_lock, flags);
 232
 233         /* Check if already processing */
 234         if (adapter->mwifiex_processing || adapter->main_locked) {
 235                 adapter->more_task_flag = true;
 236                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 237                 goto exit_main_proc;
 238         } else {
 239                 adapter->mwifiex_processing = true;
 240                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 241         }
 242 process_start:
 243         do {
 244                 if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
 245                     (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
 246                         break;
 247
 248                 /* For non-USB interfaces, If we process interrupts first, it
 249                  * would increase RX pending even further. Avoid this by
 250                  * checking if rx_pending has crossed high threshold and
 251                  * schedule rx work queue and then process interrupts.
 252                  * For USB interface, there are no interrupts. We already have
 253                  * HIGH_RX_PENDING check in usb.c
 254                  */
 255                 if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING &&
 256                     adapter->iface_type != MWIFIEX_USB) {
 257                         adapter->delay_main_work = true;
 258                         mwifiex_queue_rx_work(adapter);
 259                         break;
 260                 }
 261
 262                 /* Handle pending interrupt if any */
 263                 if (adapter->int_status) {
 264                         if (adapter->hs_activated)
 265                                 mwifiex_process_hs_config(adapter);
 266                         if (adapter->if_ops.process_int_status)
 267                                 adapter->if_ops.process_int_status(adapter);
 268                 }
 269
 270                 if (adapter->rx_work_enabled && adapter->data_received)
 271                         mwifiex_queue_rx_work(adapter);
 272
 273                 /* Need to wake up the card ? */
 274                 if ((adapter->ps_state == PS_STATE_SLEEP) &&
 275                     (adapter->pm_wakeup_card_req &&
 276                      !adapter->pm_wakeup_fw_try) &&
 277                     (is_command_pending(adapter) ||
 278                      !skb_queue_empty(&adapter->tx_data_q) ||
 279                      !mwifiex_wmm_lists_empty(adapter))) {
 280                         adapter->pm_wakeup_fw_try = true;
 281                         mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3));
 282                         adapter->if_ops.wakeup(adapter);
 283                         continue;
 284                 }
 285
 286                 if (IS_CARD_RX_RCVD(adapter)) {
 287                         adapter->data_received = false;
 288                         adapter->pm_wakeup_fw_try = false;
 289                         del_timer(&adapter->wakeup_timer);
 290                         if (adapter->ps_state == PS_STATE_SLEEP)
 291                                 adapter->ps_state = PS_STATE_AWAKE;
 292                 } else {
 293                         /* We have tried to wakeup the card already */
 294                         if (adapter->pm_wakeup_fw_try)
 295                                 break;
 296                         if (adapter->ps_state != PS_STATE_AWAKE ||
 297                             adapter->tx_lock_flag)
 298                                 break;
 299
 300                         if ((!adapter->scan_chan_gap_enabled &&
 301                              adapter->scan_processing) || adapter->data_sent ||
 302                             (mwifiex_wmm_lists_empty(adapter) &&
 303                              skb_queue_empty(&adapter->tx_data_q))) {
 304                                 if (adapter->cmd_sent || adapter->curr_cmd ||
 305                                     (!is_command_pending(adapter)))
 306                                         break;
 307                         }
 308                 }
 309
 310                 /* Check for event */
 311                 if (adapter->event_received) {
 312                         adapter->event_received = false;
 313                         mwifiex_process_event(adapter);
 314                 }
 315
 316                 /* Check for Cmd Resp */
 317                 if (adapter->cmd_resp_received) {
 318                         adapter->cmd_resp_received = false;
 319                         mwifiex_process_cmdresp(adapter);
 320
 321                         /* call mwifiex back when init_fw is done */
 322                         if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
 323                                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 324                                 mwifiex_init_fw_complete(adapter);
 325                         }
 326                 }
 327
 328                 /* Check if we need to confirm Sleep Request
 329                    received previously */
 330                 if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
 331                         if (!adapter->cmd_sent && !adapter->curr_cmd)
 332                                 mwifiex_check_ps_cond(adapter);
 333                 }
 334
 335                 /* * The ps_state may have been changed during processing of
 336                  * Sleep Request event.
 337                  */
 338                 if ((adapter->ps_state == PS_STATE_SLEEP) ||
 339                     (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
 340                     (adapter->ps_state == PS_STATE_SLEEP_CFM) ||
 341                     adapter->tx_lock_flag){
 342                         continue;
 343                 }
 344
 345                 if (!adapter->cmd_sent && !adapter->curr_cmd) {
 346                         if (mwifiex_exec_next_cmd(adapter) == -1) {
 347                                 ret = -1;
 348                                 break;
 349                         }
 350                 }
 351
 352                 if ((adapter->scan_chan_gap_enabled ||
 353                      !adapter->scan_processing) &&
 354                     !adapter->data_sent &&
 355                     !skb_queue_empty(&adapter->tx_data_q)) {
 356                         mwifiex_process_tx_queue(adapter);
 357                         if (adapter->hs_activated) {
 358                                 adapter->is_hs_configured = false;
 359                                 mwifiex_hs_activated_event
 360                                         (mwifiex_get_priv
 361                                         (adapter, MWIFIEX_BSS_ROLE_ANY),
 362                                         false);
 363                         }
 364                 }
 365
 366                 if ((adapter->scan_chan_gap_enabled ||
 367                      !adapter->scan_processing) &&
 368                     !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter)) {
 369                         mwifiex_wmm_process_tx(adapter);
 370                         if (adapter->hs_activated) {
 371                                 adapter->is_hs_configured = false;
 372                                 mwifiex_hs_activated_event
 373                                         (mwifiex_get_priv
 374                                          (adapter, MWIFIEX_BSS_ROLE_ANY),
 375                                          false);
 376                         }
 377                 }
 378
 379                 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
 380                     !adapter->curr_cmd && !is_command_pending(adapter) &&
 381                     (mwifiex_wmm_lists_empty(adapter) &&
 382                      skb_queue_empty(&adapter->tx_data_q))) {
 383                         if (!mwifiex_send_null_packet
 384                             (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
 385                              MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 386                              MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
 387                                 adapter->delay_null_pkt = false;
 388                                 adapter->ps_state = PS_STATE_SLEEP;
 389                         }
 390                         break;
 391                 }
 392         } while (true);
 393
 394         spin_lock_irqsave(&adapter->main_proc_lock, flags);
 395         if (adapter->more_task_flag) {
 396                 adapter->more_task_flag = false;
 397                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 398                 goto process_start;
 399         }
 400         adapter->mwifiex_processing = false;
 401         spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 402
 403 exit_main_proc:
 404         if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
 405                 mwifiex_shutdown_drv(adapter);
 406         return ret;
 407 }
 408 EXPORT_SYMBOL_GPL(mwifiex_main_process);
 409
 410 /*
 411  * This function frees the adapter structure.
 412  *
 413  * Additionally, this closes the netlink socket, frees the timers
 414  * and private structures.
 415  */
 416 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
 417 {
 418         if (!adapter) {
 419                 pr_err("%s: adapter is NULL\n", __func__);
 420                 return;
 421         }
 422
 423         mwifiex_unregister(adapter);
 424         pr_debug("info: %s: free adapter\n", __func__);
 425 }
 426
 427 /*
 428  * This function cancels all works in the queue and destroys
 429  * the main workqueue.
 430  */
 431 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
 432 {
 433         flush_workqueue(adapter->workqueue);
 434         destroy_workqueue(adapter->workqueue);
 435         adapter->workqueue = NULL;
 436
 437         if (adapter->rx_workqueue) {
 438                 flush_workqueue(adapter->rx_workqueue);
 439                 destroy_workqueue(adapter->rx_workqueue);
 440                 adapter->rx_workqueue = NULL;
 441         }
 442 }
 443
 444 /*
 445  * This function gets firmware and initializes it.
 446  *
 447  * The main initialization steps followed are -
 448  *      - Download the correct firmware to card
 449  *      - Issue the init commands to firmware
 450  */
 451 static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
 452 {
 453         int ret;
 454         char fmt[64];
 455         struct mwifiex_private *priv;
 456         struct mwifiex_adapter *adapter = context;
 457         struct mwifiex_fw_image fw;
 458         struct semaphore *sem = adapter->card_sem;
 459         bool init_failed = false;
 460         struct wireless_dev *wdev;
 461
 462         if (!firmware) {
 463                 mwifiex_dbg(adapter, ERROR,
 464                             "Failed to get firmware %s\n", adapter->fw_name);
 465                 goto err_dnld_fw;
 466         }
 467
 468         memset(&fw, 0, sizeof(struct mwifiex_fw_image));
 469         adapter->firmware = firmware;
 470         fw.fw_buf = (u8 *) adapter->firmware->data;
 471         fw.fw_len = adapter->firmware->size;
 472
 473         if (adapter->if_ops.dnld_fw)
 474                 ret = adapter->if_ops.dnld_fw(adapter, &fw);
 475         else
 476                 ret = mwifiex_dnld_fw(adapter, &fw);
 477         if (ret == -1)
 478                 goto err_dnld_fw;
 479
 480         mwifiex_dbg(adapter, MSG, "WLAN FW is active\n");
 481
 482         if (cal_data_cfg) {
 483                 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
 484                                       adapter->dev)) < 0)
 485                         mwifiex_dbg(adapter, ERROR,
 486                                     "Cal data request_firmware() failed\n");
 487         }
 488
 489         /* enable host interrupt after fw dnld is successful */
 490         if (adapter->if_ops.enable_int) {
 491                 if (adapter->if_ops.enable_int(adapter))
 492                         goto err_dnld_fw;
 493         }
 494
 495         adapter->init_wait_q_woken = false;
 496         ret = mwifiex_init_fw(adapter);
 497         if (ret == -1) {
 498                 goto err_init_fw;
 499         } else if (!ret) {
 500                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 501                 goto done;
 502         }
 503         /* Wait for mwifiex_init to complete */
 504         wait_event_interruptible(adapter->init_wait_q,
 505                                  adapter->init_wait_q_woken);
 506         if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
 507                 goto err_init_fw;
 508
 509         priv = adapter->priv[MWIFIEX_BSS_ROLE_STA];
 510         if (mwifiex_register_cfg80211(adapter)) {
 511                 mwifiex_dbg(adapter, ERROR,
 512                             "cannot register with cfg80211\n");
 513                 goto err_init_fw;
 514         }
 515
 516         if (mwifiex_init_channel_scan_gap(adapter)) {
 517                 mwifiex_dbg(adapter, ERROR,
 518                             "could not init channel stats table\n");
 519                 goto err_init_fw;
 520         }
 521
 522         if (driver_mode) {
 523                 driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK;
 524                 driver_mode |= MWIFIEX_DRIVER_MODE_STA;
 525         }
 526
 527         rtnl_lock();
 528         /* Create station interface by default */
 529         wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NET_NAME_ENUM,
 530                                         NL80211_IFTYPE_STATION, NULL, NULL);
 531         if (IS_ERR(wdev)) {
 532                 mwifiex_dbg(adapter, ERROR,
 533                             "cannot create default STA interface\n");
 534                 rtnl_unlock();
 535                 goto err_add_intf;
 536         }
 537
 538         if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) {
 539                 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d", NET_NAME_ENUM,
 540                                                 NL80211_IFTYPE_AP, NULL, NULL);
 541                 if (IS_ERR(wdev)) {
 542                         mwifiex_dbg(adapter, ERROR,
 543                                     "cannot create AP interface\n");
 544                         rtnl_unlock();
 545                         goto err_add_intf;
 546                 }
 547         }
 548
 549         if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) {
 550                 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d", NET_NAME_ENUM,
 551                                                 NL80211_IFTYPE_P2P_CLIENT, NULL,
 552                                                 NULL);
 553                 if (IS_ERR(wdev)) {
 554                         mwifiex_dbg(adapter, ERROR,
 555                                     "cannot create p2p client interface\n");
 556                         rtnl_unlock();
 557                         goto err_add_intf;
 558                 }
 559         }
 560         rtnl_unlock();
 561
 562         mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
 563         mwifiex_dbg(adapter, MSG, "driver_version = %s\n", fmt);
 564         goto done;
 565
 566 err_add_intf:
 567         wiphy_unregister(adapter->wiphy);
 568         wiphy_free(adapter->wiphy);
 569 err_init_fw:
 570         if (adapter->if_ops.disable_int)
 571                 adapter->if_ops.disable_int(adapter);
 572 err_dnld_fw:
 573         mwifiex_dbg(adapter, ERROR,
 574                     "info: %s: unregister device\n", __func__);
 575         if (adapter->if_ops.unregister_dev)
 576                 adapter->if_ops.unregister_dev(adapter);
 577
 578         if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
 579                 pr_debug("info: %s: shutdown mwifiex\n", __func__);
 580                 adapter->init_wait_q_woken = false;
 581
 582                 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
 583                         wait_event_interruptible(adapter->init_wait_q,
 584                                                  adapter->init_wait_q_woken);
 585         }
 586         adapter->surprise_removed = true;
 587         mwifiex_terminate_workqueue(adapter);
 588         init_failed = true;
 589 done:
 590         if (adapter->cal_data) {
 591                 release_firmware(adapter->cal_data);
 592                 adapter->cal_data = NULL;
 593         }
 594         if (adapter->firmware) {
 595                 release_firmware(adapter->firmware);
 596                 adapter->firmware = NULL;
 597         }
 598         if (init_failed)
 599                 mwifiex_free_adapter(adapter);
 600         up(sem);
 601         return;
 602 }
 603
 604 /*
 605  * This function initializes the hardware and gets firmware.
 606  */
 607 static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter)
 608 {
 609         int ret;
 610
 611         ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
 612                                       adapter->dev, GFP_KERNEL, adapter,
 613                                       mwifiex_fw_dpc);
 614         if (ret < 0)
 615                 mwifiex_dbg(adapter, ERROR,
 616                             "request_firmware_nowait error %d\n", ret);
 617         return ret;
 618 }
 619
 620 /*
 621  * CFG802.11 network device handler for open.
 622  *
 623  * Starts the data queue.
 624  */
 625 static int
 626 mwifiex_open(struct net_device *dev)
 627 {
 628         netif_carrier_off(dev);
 629
 630         return 0;
 631 }
 632
 633 /*
 634  * CFG802.11 network device handler for close.
 635  */
 636 static int
 637 mwifiex_close(struct net_device *dev)
 638 {
 639         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 640
 641         if (priv->scan_request) {
 642                 mwifiex_dbg(priv->adapter, INFO,
 643                             "aborting scan on ndo_stop\n");
 644                 cfg80211_scan_done(priv->scan_request, 1);
 645                 priv->scan_request = NULL;
 646                 priv->scan_aborting = true;
 647         }
 648
 649         return 0;
 650 }
 651
 652 /*
 653  * Add buffer into wmm tx queue and queue work to transmit it.
 654  */
 655 int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
 656 {
 657         struct netdev_queue *txq;
 658         int index = mwifiex_1d_to_wmm_queue[skb->priority];
 659
 660         if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
 661                 txq = netdev_get_tx_queue(priv->netdev, index);
 662                 if (!netif_tx_queue_stopped(txq)) {
 663                         netif_tx_stop_queue(txq);
 664                         mwifiex_dbg(priv->adapter, DATA,
 665                                     "stop queue: %d\n", index);
 666                 }
 667         }
 668
 669         atomic_inc(&priv->adapter->tx_pending);
 670         mwifiex_wmm_add_buf_txqueue(priv, skb);
 671
 672         mwifiex_queue_main_work(priv->adapter);
 673
 674         return 0;
 675 }
 676
 677 struct sk_buff *
 678 mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv,
 679                                 struct sk_buff *skb, u8 flag, u64 *cookie)
 680 {
 681         struct sk_buff *orig_skb = skb;
 682         struct mwifiex_txinfo *tx_info, *orig_tx_info;
 683
 684         skb = skb_clone(skb, GFP_ATOMIC);
 685         if (skb) {
 686                 unsigned long flags;
 687                 int id;
 688
 689                 spin_lock_irqsave(&priv->ack_status_lock, flags);
 690                 id = idr_alloc(&priv->ack_status_frames, orig_skb,
 691                                1, 0xff, GFP_ATOMIC);
 692                 spin_unlock_irqrestore(&priv->ack_status_lock, flags);
 693
 694                 if (id >= 0) {
 695                         tx_info = MWIFIEX_SKB_TXCB(skb);
 696                         tx_info->ack_frame_id = id;
 697                         tx_info->flags |= flag;
 698                         orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb);
 699                         orig_tx_info->ack_frame_id = id;
 700                         orig_tx_info->flags |= flag;
 701
 702                         if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie)
 703                                 orig_tx_info->cookie = *cookie;
 704
 705                 } else if (skb_shared(skb)) {
 706                         kfree_skb(orig_skb);
 707                 } else {
 708                         kfree_skb(skb);
 709                         skb = orig_skb;
 710                 }
 711         } else {
 712                 /* couldn't clone -- lose tx status ... */
 713                 skb = orig_skb;
 714         }
 715
 716         return skb;
 717 }
 718
 719 /*
 720  * CFG802.11 network device handler for data transmission.
 721  */
 722 static int
 723 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 724 {
 725         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 726         struct sk_buff *new_skb;
 727         struct mwifiex_txinfo *tx_info;
 728         bool multicast;
 729
 730         mwifiex_dbg(priv->adapter, DATA,
 731                     "data: %lu BSS(%d-%d): Data <= kernel\n",
 732                     jiffies, priv->bss_type, priv->bss_num);
 733
 734         if (priv->adapter->surprise_removed) {
 735                 kfree_skb(skb);
 736                 priv->stats.tx_dropped++;
 737                 return 0;
 738         }
 739         if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
 740                 mwifiex_dbg(priv->adapter, ERROR,
 741                             "Tx: bad skb len %d\n", skb->len);
 742                 kfree_skb(skb);
 743                 priv->stats.tx_dropped++;
 744                 return 0;
 745         }
 746         if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
 747                 mwifiex_dbg(priv->adapter, DATA,
 748                             "data: Tx: insufficient skb headroom %d\n",
 749                             skb_headroom(skb));
 750                 /* Insufficient skb headroom - allocate a new skb */
 751                 new_skb =
 752                         skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
 753                 if (unlikely(!new_skb)) {
 754                         mwifiex_dbg(priv->adapter, ERROR,
 755                                     "Tx: cannot alloca new_skb\n");
 756                         kfree_skb(skb);
 757                         priv->stats.tx_dropped++;
 758                         return 0;
 759                 }
 760                 kfree_skb(skb);
 761                 skb = new_skb;
 762                 mwifiex_dbg(priv->adapter, INFO,
 763                             "info: new skb headroomd %d\n",
 764                             skb_headroom(skb));
 765         }
 766
 767         tx_info = MWIFIEX_SKB_TXCB(skb);
 768         memset(tx_info, 0, sizeof(*tx_info));
 769         tx_info->bss_num = priv->bss_num;
 770         tx_info->bss_type = priv->bss_type;
 771         tx_info->pkt_len = skb->len;
 772
 773         multicast = is_multicast_ether_addr(skb->data);
 774
 775         if (unlikely(!multicast && skb->sk &&
 776                      skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS &&
 777                      priv->adapter->fw_api_ver == MWIFIEX_FW_V15))
 778                 skb = mwifiex_clone_skb_for_tx_status(priv,
 779                                                       skb,
 780                                         MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL);
 781
 782         /* Record the current time the packet was queued; used to
 783          * determine the amount of time the packet was queued in
 784          * the driver before it was sent to the firmware.
 785          * The delay is then sent along with the packet to the
 786          * firmware for aggregate delay calculation for stats and
 787          * MSDU lifetime expiry.
 788          */
 789         __net_timestamp(skb);
 790
 791         if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
 792             priv->bss_type == MWIFIEX_BSS_TYPE_STA &&
 793             !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) {
 794                 if (priv->adapter->auto_tdls && priv->check_tdls_tx)
 795                         mwifiex_tdls_check_tx(priv, skb);
 796         }
 797
 798         mwifiex_queue_tx_pkt(priv, skb);
 799
 800         return 0;
 801 }
 802
 803 /*
 804  * CFG802.11 network device handler for setting MAC address.
 805  */
 806 static int
 807 mwifiex_set_mac_address(struct net_device *dev, void *addr)
 808 {
 809         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 810         struct sockaddr *hw_addr = addr;
 811         int ret;
 812
 813         memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
 814
 815         /* Send request to firmware */
 816         ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
 817                                HostCmd_ACT_GEN_SET, 0, NULL, true);
 818
 819         if (!ret)
 820                 memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
 821         else
 822                 mwifiex_dbg(priv->adapter, ERROR,
 823                             "set mac address failed: ret=%d\n", ret);
 824
 825         memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
 826
 827         return ret;
 828 }
 829
 830 /*
 831  * CFG802.11 network device handler for setting multicast list.
 832  */
 833 static void mwifiex_set_multicast_list(struct net_device *dev)
 834 {
 835         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 836         struct mwifiex_multicast_list mcast_list;
 837
 838         if (dev->flags & IFF_PROMISC) {
 839                 mcast_list.mode = MWIFIEX_PROMISC_MODE;
 840         } else if (dev->flags & IFF_ALLMULTI ||
 841                    netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
 842                 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
 843         } else {
 844                 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
 845                 mcast_list.num_multicast_addr =
 846                         mwifiex_copy_mcast_addr(&mcast_list, dev);
 847         }
 848         mwifiex_request_set_multicast_list(priv, &mcast_list);
 849 }
 850
 851 /*
 852  * CFG802.11 network device handler for transmission timeout.
 853  */
 854 static void
 855 mwifiex_tx_timeout(struct net_device *dev)
 856 {
 857         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 858
 859         priv->num_tx_timeout++;
 860         priv->tx_timeout_cnt++;
 861         mwifiex_dbg(priv->adapter, ERROR,
 862                     "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
 863                     jiffies, priv->tx_timeout_cnt, priv->bss_type,
 864                     priv->bss_num);
 865         mwifiex_set_trans_start(dev);
 866
 867         if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
 868             priv->adapter->if_ops.card_reset) {
 869                 mwifiex_dbg(priv->adapter, ERROR,
 870                             "tx_timeout_cnt exceeds threshold.\t"
 871                             "Triggering card reset!\n");
 872                 priv->adapter->if_ops.card_reset(priv->adapter);
 873         }
 874 }
 875
 876 void mwifiex_dump_drv_info(struct mwifiex_adapter *adapter)
 877 {
 878         void *p;
 879         char drv_version[64];
 880         struct usb_card_rec *cardp;
 881         struct sdio_mmc_card *sdio_card;
 882         struct mwifiex_private *priv;
 883         int i, idx;
 884         struct netdev_queue *txq;
 885         struct mwifiex_debug_info *debug_info;
 886
 887         if (adapter->drv_info_dump) {
 888                 vfree(adapter->drv_info_dump);
 889                 adapter->drv_info_dump = NULL;
 890                 adapter->drv_info_size = 0;
 891         }
 892
 893         mwifiex_dbg(adapter, MSG, "=== DRIVER INFO DUMP START===\n");
 894
 895         adapter->drv_info_dump = vzalloc(MWIFIEX_DRV_INFO_SIZE_MAX);
 896
 897         if (!adapter->drv_info_dump)
 898                 return;
 899
 900         p = (char *)(adapter->drv_info_dump);
 901         p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
 902
 903         mwifiex_drv_get_driver_version(adapter, drv_version,
 904                                        sizeof(drv_version) - 1);
 905         p += sprintf(p, "driver_version = %s\n", drv_version);
 906
 907         if (adapter->iface_type == MWIFIEX_USB) {
 908                 cardp = (struct usb_card_rec *)adapter->card;
 909                 p += sprintf(p, "tx_cmd_urb_pending = %d\n",
 910                              atomic_read(&cardp->tx_cmd_urb_pending));
 911                 p += sprintf(p, "tx_data_urb_pending = %d\n",
 912                              atomic_read(&cardp->tx_data_urb_pending));
 913                 p += sprintf(p, "rx_cmd_urb_pending = %d\n",
 914                              atomic_read(&cardp->rx_cmd_urb_pending));
 915                 p += sprintf(p, "rx_data_urb_pending = %d\n",
 916                              atomic_read(&cardp->rx_data_urb_pending));
 917         }
 918
 919         p += sprintf(p, "tx_pending = %d\n",
 920                      atomic_read(&adapter->tx_pending));
 921         p += sprintf(p, "rx_pending = %d\n",
 922                      atomic_read(&adapter->rx_pending));
 923
 924         if (adapter->iface_type == MWIFIEX_SDIO) {
 925                 sdio_card = (struct sdio_mmc_card *)adapter->card;
 926                 p += sprintf(p, "\nmp_rd_bitmap=0x%x curr_rd_port=0x%x\n",
 927                              sdio_card->mp_rd_bitmap, sdio_card->curr_rd_port);
 928                 p += sprintf(p, "mp_wr_bitmap=0x%x curr_wr_port=0x%x\n",
 929                              sdio_card->mp_wr_bitmap, sdio_card->curr_wr_port);
 930         }
 931
 932         for (i = 0; i < adapter->priv_num; i++) {
 933                 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
 934                         continue;
 935                 priv = adapter->priv[i];
 936                 p += sprintf(p, "\n[interface  : \"%s\"]\n",
 937                              priv->netdev->name);
 938                 p += sprintf(p, "wmm_tx_pending[0] = %d\n",
 939                              atomic_read(&priv->wmm_tx_pending[0]));
 940                 p += sprintf(p, "wmm_tx_pending[1] = %d\n",
 941                              atomic_read(&priv->wmm_tx_pending[1]));
 942                 p += sprintf(p, "wmm_tx_pending[2] = %d\n",
 943                              atomic_read(&priv->wmm_tx_pending[2]));
 944                 p += sprintf(p, "wmm_tx_pending[3] = %d\n",
 945                              atomic_read(&priv->wmm_tx_pending[3]));
 946                 p += sprintf(p, "media_state=\"%s\"\n", !priv->media_connected ?
 947                              "Disconnected" : "Connected");
 948                 p += sprintf(p, "carrier %s\n", (netif_carrier_ok(priv->netdev)
 949                              ? "on" : "off"));
 950                 for (idx = 0; idx < priv->netdev->num_tx_queues; idx++) {
 951                         txq = netdev_get_tx_queue(priv->netdev, idx);
 952                         p += sprintf(p, "tx queue %d:%s  ", idx,
 953                                      netif_tx_queue_stopped(txq) ?
 954                                      "stopped" : "started");
 955                 }
 956                 p += sprintf(p, "\n%s: num_tx_timeout = %d\n",
 957                              priv->netdev->name, priv->num_tx_timeout);
 958         }
 959
 960         if (adapter->iface_type == MWIFIEX_SDIO) {
 961                 p += sprintf(p, "\n=== SDIO register DUMP===\n");
 962                 if (adapter->if_ops.reg_dump)
 963                         p += adapter->if_ops.reg_dump(adapter, p);
 964         }
 965
 966         p += sprintf(p, "\n=== MORE DEBUG INFORMATION\n");
 967         debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL);
 968         if (debug_info) {
 969                 for (i = 0; i < adapter->priv_num; i++) {
 970                         if (!adapter->priv[i] || !adapter->priv[i]->netdev)
 971                                 continue;
 972                         priv = adapter->priv[i];
 973                         mwifiex_get_debug_info(priv, debug_info);
 974                         p += mwifiex_debug_info_to_buffer(priv, p, debug_info);
 975                         break;
 976                 }
 977                 kfree(debug_info);
 978         }
 979
 980         adapter->drv_info_size = p - adapter->drv_info_dump;
 981         mwifiex_dbg(adapter, MSG, "=== DRIVER INFO DUMP END===\n");
 982 }
 983 EXPORT_SYMBOL_GPL(mwifiex_dump_drv_info);
 984
 985 /*
 986  * CFG802.11 network device handler for statistics retrieval.
 987  */
 988 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
 989 {
 990         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 991
 992         return &priv->stats;
 993 }
 994
 995 static u16
 996 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
 997                                 void *accel_priv, select_queue_fallback_t fallback)
 998 {
 999         skb->priority = cfg80211_classify8021d(skb, NULL);
1000         return mwifiex_1d_to_wmm_queue[skb->priority];
1001 }
1002
1003 /* Network device handlers */
1004 static const struct net_device_ops mwifiex_netdev_ops = {
1005         .ndo_open = mwifiex_open,
1006         .ndo_stop = mwifiex_close,
1007         .ndo_start_xmit = mwifiex_hard_start_xmit,
1008         .ndo_set_mac_address = mwifiex_set_mac_address,
1009         .ndo_tx_timeout = mwifiex_tx_timeout,
1010         .ndo_get_stats = mwifiex_get_stats,
1011         .ndo_set_rx_mode = mwifiex_set_multicast_list,
1012         .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
1013 };
1014
1015 /*
1016  * This function initializes the private structure parameters.
1017  *
1018  * The following wait queues are initialized -
1019  *      - IOCTL wait queue
1020  *      - Command wait queue
1021  *      - Statistics wait queue
1022  *
1023  * ...and the following default parameters are set -
1024  *      - Current key index     : Set to 0
1025  *      - Rate index            : Set to auto
1026  *      - Media connected       : Set to disconnected
1027  *      - Adhoc link sensed     : Set to false
1028  *      - Nick name             : Set to null
1029  *      - Number of Tx timeout  : Set to 0
1030  *      - Device address        : Set to current address
1031  *      - Rx histogram statistc : Set to 0
1032  *
1033  * In addition, the CFG80211 work queue is also created.
1034  */
1035 void mwifiex_init_priv_params(struct mwifiex_private *priv,
1036                               struct net_device *dev)
1037 {
1038         dev->netdev_ops = &mwifiex_netdev_ops;
1039         dev->destructor = free_netdev;
1040         /* Initialize private structure */
1041         priv->current_key_index = 0;
1042         priv->media_connected = false;
1043         memset(priv->mgmt_ie, 0,
1044                sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
1045         priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
1046         priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
1047         priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
1048         priv->gen_idx = MWIFIEX_AUTO_IDX_MASK;
1049         priv->num_tx_timeout = 0;
1050         ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr);
1051         memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
1052
1053         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
1054             GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
1055                 priv->hist_data = kmalloc(sizeof(*priv->hist_data), GFP_KERNEL);
1056                 if (priv->hist_data)
1057                         mwifiex_hist_data_reset(priv);
1058         }
1059 }
1060
1061 /*
1062  * This function check if command is pending.
1063  */
1064 int is_command_pending(struct mwifiex_adapter *adapter)
1065 {
1066         unsigned long flags;
1067         int is_cmd_pend_q_empty;
1068
1069         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
1070         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
1071         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
1072
1073         return !is_cmd_pend_q_empty;
1074 }
1075
1076 /*
1077  * This is the RX work queue function.
1078  *
1079  * It handles the RX operations.
1080  */
1081 static void mwifiex_rx_work_queue(struct work_struct *work)
1082 {
1083         struct mwifiex_adapter *adapter =
1084                 container_of(work, struct mwifiex_adapter, rx_work);
1085
1086         if (adapter->surprise_removed)
1087                 return;
1088         mwifiex_process_rx(adapter);
1089 }
1090
1091 /*
1092  * This is the main work queue function.
1093  *
1094  * It handles the main process, which in turn handles the complete
1095  * driver operations.
1096  */
1097 static void mwifiex_main_work_queue(struct work_struct *work)
1098 {
1099         struct mwifiex_adapter *adapter =
1100                 container_of(work, struct mwifiex_adapter, main_work);
1101
1102         if (adapter->surprise_removed)
1103                 return;
1104         mwifiex_main_process(adapter);
1105 }
1106
1107 /*
1108  * This function adds the card.
1109  *
1110  * This function follows the following major steps to set up the device -
1111  *      - Initialize software. This includes probing the card, registering
1112  *        the interface operations table, and allocating/initializing the
1113  *        adapter structure
1114  *      - Set up the netlink socket
1115  *      - Create and start the main work queue
1116  *      - Register the device
1117  *      - Initialize firmware and hardware
1118  *      - Add logical interfaces
1119  */
1120 int
1121 mwifiex_add_card(void *card, struct semaphore *sem,
1122                  struct mwifiex_if_ops *if_ops, u8 iface_type)
1123 {
1124         struct mwifiex_adapter *adapter;
1125
1126         if (down_interruptible(sem))
1127                 goto exit_sem_err;
1128
1129         if (mwifiex_register(card, if_ops, (void **)&adapter)) {
1130                 pr_err("%s: software init failed\n", __func__);
1131                 goto err_init_sw;
1132         }
1133
1134         adapter->iface_type = iface_type;
1135         adapter->card_sem = sem;
1136
1137         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
1138         adapter->surprise_removed = false;
1139         init_waitqueue_head(&adapter->init_wait_q);
1140         adapter->is_suspended = false;
1141         adapter->hs_activated = false;
1142         init_waitqueue_head(&adapter->hs_activate_wait_q);
1143         init_waitqueue_head(&adapter->cmd_wait_q.wait);
1144         adapter->cmd_wait_q.status = 0;
1145         adapter->scan_wait_q_woken = false;
1146
1147         if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB) {
1148                 adapter->rx_work_enabled = true;
1149                 pr_notice("rx work enabled, cpus %d\n", num_possible_cpus());
1150         }
1151
1152         adapter->workqueue =
1153                 alloc_workqueue("MWIFIEX_WORK_QUEUE",
1154                                 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
1155         if (!adapter->workqueue)
1156                 goto err_kmalloc;
1157
1158         INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
1159
1160         if (adapter->rx_work_enabled) {
1161                 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
1162                                                         WQ_HIGHPRI |
1163                                                         WQ_MEM_RECLAIM |
1164                                                         WQ_UNBOUND, 1);
1165                 if (!adapter->rx_workqueue)
1166                         goto err_kmalloc;
1167
1168                 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
1169         }
1170
1171         /* Register the device. Fill up the private data structure with relevant
1172            information from the card. */
1173         if (adapter->if_ops.register_dev(adapter)) {
1174                 pr_err("%s: failed to register mwifiex device\n", __func__);
1175                 goto err_registerdev;
1176         }
1177
1178         if (mwifiex_init_hw_fw(adapter)) {
1179                 pr_err("%s: firmware init failed\n", __func__);
1180                 goto err_init_fw;
1181         }
1182
1183         return 0;
1184
1185 err_init_fw:
1186         pr_debug("info: %s: unregister device\n", __func__);
1187         if (adapter->if_ops.unregister_dev)
1188                 adapter->if_ops.unregister_dev(adapter);
1189         if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
1190                 pr_debug("info: %s: shutdown mwifiex\n", __func__);
1191                 adapter->init_wait_q_woken = false;
1192
1193                 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1194                         wait_event_interruptible(adapter->init_wait_q,
1195                                                  adapter->init_wait_q_woken);
1196         }
1197 err_registerdev:
1198         adapter->surprise_removed = true;
1199         mwifiex_terminate_workqueue(adapter);
1200 err_kmalloc:
1201         mwifiex_free_adapter(adapter);
1202
1203 err_init_sw:
1204         up(sem);
1205
1206 exit_sem_err:
1207         return -1;
1208 }
1209 EXPORT_SYMBOL_GPL(mwifiex_add_card);
1210
1211 /*
1212  * This function removes the card.
1213  *
1214  * This function follows the following major steps to remove the device -
1215  *      - Stop data traffic
1216  *      - Shutdown firmware
1217  *      - Remove the logical interfaces
1218  *      - Terminate the work queue
1219  *      - Unregister the device
1220  *      - Free the adapter structure
1221  */
1222 int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
1223 {
1224         struct mwifiex_private *priv = NULL;
1225         int i;
1226
1227         if (down_interruptible(sem))
1228                 goto exit_sem_err;
1229
1230         if (!adapter)
1231                 goto exit_remove;
1232
1233         /* We can no longer handle interrupts once we start doing the teardown
1234          * below. */
1235         if (adapter->if_ops.disable_int)
1236                 adapter->if_ops.disable_int(adapter);
1237
1238         adapter->surprise_removed = true;
1239
1240         mwifiex_terminate_workqueue(adapter);
1241
1242         /* Stop data */
1243         for (i = 0; i < adapter->priv_num; i++) {
1244                 priv = adapter->priv[i];
1245                 if (priv && priv->netdev) {
1246                         mwifiex_stop_net_dev_queue(priv->netdev, adapter);
1247                         if (netif_carrier_ok(priv->netdev))
1248                                 netif_carrier_off(priv->netdev);
1249                 }
1250         }
1251
1252         mwifiex_dbg(adapter, CMD,
1253                     "cmd: calling mwifiex_shutdown_drv...\n");
1254         adapter->init_wait_q_woken = false;
1255
1256         if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1257                 wait_event_interruptible(adapter->init_wait_q,
1258                                          adapter->init_wait_q_woken);
1259         mwifiex_dbg(adapter, CMD,
1260                     "cmd: mwifiex_shutdown_drv done\n");
1261         if (atomic_read(&adapter->rx_pending) ||
1262             atomic_read(&adapter->tx_pending) ||
1263             atomic_read(&adapter->cmd_pending)) {
1264                 mwifiex_dbg(adapter, ERROR,
1265                             "rx_pending=%d, tx_pending=%d,\t"
1266                             "cmd_pending=%d\n",
1267                             atomic_read(&adapter->rx_pending),
1268                             atomic_read(&adapter->tx_pending),
1269                             atomic_read(&adapter->cmd_pending));
1270         }
1271
1272         for (i = 0; i < adapter->priv_num; i++) {
1273                 priv = adapter->priv[i];
1274
1275                 if (!priv)
1276                         continue;
1277
1278                 rtnl_lock();
1279                 if (priv->netdev &&
1280                     priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
1281                         mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
1282                 rtnl_unlock();
1283         }
1284
1285         wiphy_unregister(adapter->wiphy);
1286         wiphy_free(adapter->wiphy);
1287
1288         /* Unregister device */
1289         mwifiex_dbg(adapter, INFO,
1290                     "info: unregister device\n");
1291         if (adapter->if_ops.unregister_dev)
1292                 adapter->if_ops.unregister_dev(adapter);
1293         /* Free adapter structure */
1294         mwifiex_dbg(adapter, INFO,
1295                     "info: free adapter\n");
1296         mwifiex_free_adapter(adapter);
1297
1298 exit_remove:
1299         up(sem);
1300 exit_sem_err:
1301         return 0;
1302 }
1303 EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1304
1305 /*
1306  * This function initializes the module.
1307  *
1308  * The debug FS is also initialized if configured.
1309  */
1310 static int
1311 mwifiex_init_module(void)
1312 {
1313 #ifdef CONFIG_DEBUG_FS
1314         mwifiex_debugfs_init();
1315 #endif
1316         return 0;
1317 }
1318
1319 /*
1320  * This function cleans up the module.
1321  *
1322  * The debug FS is removed if available.
1323  */
1324 static void
1325 mwifiex_cleanup_module(void)
1326 {
1327 #ifdef CONFIG_DEBUG_FS
1328         mwifiex_debugfs_remove();
1329 #endif
1330 }
1331
1332 module_init(mwifiex_init_module);
1333 module_exit(mwifiex_cleanup_module);
1334
1335 MODULE_AUTHOR("Marvell International Ltd.");
1336 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1337 MODULE_VERSION(VERSION);
1338 MODULE_LICENSE("GPL v2");