drivers/net/wireless/marvell/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 <linux/suspend.h>
  21
  22 #include "main.h"
  23 #include "wmm.h"
  24 #include "cfg80211.h"
  25 #include "11n.h"
  26
  27 #define VERSION "1.0"
  28 #define MFG_FIRMWARE    "mwifiex_mfg.bin"
  29
  30 static unsigned int debug_mask = MWIFIEX_DEFAULT_DEBUG_MASK;
  31 module_param(debug_mask, uint, 0);
  32 MODULE_PARM_DESC(debug_mask, "bitmap for debug flags");
  33
  34 const char driver_version[] = "mwifiex " VERSION " (%s) ";
  35 static char *cal_data_cfg;
  36 module_param(cal_data_cfg, charp, 0);
  37
  38 static unsigned short driver_mode;
  39 module_param(driver_mode, ushort, 0);
  40 MODULE_PARM_DESC(driver_mode,
  41                  "station=0x1(default), ap-sta=0x3, station-p2p=0x5, ap-sta-p2p=0x7");
  42
  43 bool mfg_mode;
  44 module_param(mfg_mode, bool, 0);
  45 MODULE_PARM_DESC(mfg_mode, "manufacturing mode enable:1, disable:0");
  46
  47 /*
  48  * This function registers the device and performs all the necessary
  49  * initializations.
  50  *
  51  * The following initialization operations are performed -
  52  *      - Allocate adapter structure
  53  *      - Save interface specific operations table in adapter
  54  *      - Call interface specific initialization routine
  55  *      - Allocate private structures
  56  *      - Set default adapter structure parameters
  57  *      - Initialize locks
  58  *
  59  * In case of any errors during inittialization, this function also ensures
  60  * proper cleanup before exiting.
  61  */
  62 static int mwifiex_register(void *card, struct device *dev,
  63                             struct mwifiex_if_ops *if_ops, void **padapter)
  64 {
  65         struct mwifiex_adapter *adapter;
  66         int i;
  67
  68         adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
  69         if (!adapter)
  70                 return -ENOMEM;
  71
  72         *padapter = adapter;
  73         adapter->dev = dev;
  74         adapter->card = card;
  75
  76         /* Save interface specific operations in adapter */
  77         memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
  78         adapter->debug_mask = debug_mask;
  79
  80         /* card specific initialization has been deferred until now .. */
  81         if (adapter->if_ops.init_if)
  82                 if (adapter->if_ops.init_if(adapter))
  83                         goto error;
  84
  85         adapter->priv_num = 0;
  86
  87         for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
  88                 /* Allocate memory for private structure */
  89                 adapter->priv[i] =
  90                         kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
  91                 if (!adapter->priv[i])
  92                         goto error;
  93
  94                 adapter->priv[i]->adapter = adapter;
  95                 adapter->priv_num++;
  96         }
  97         mwifiex_init_lock_list(adapter);
  98
  99         setup_timer(&adapter->cmd_timer, mwifiex_cmd_timeout_func,
 100                     (unsigned long)adapter);
 101
 102         return 0;
 103
 104 error:
 105         mwifiex_dbg(adapter, ERROR,
 106                     "info: leave mwifiex_register with error\n");
 107
 108         for (i = 0; i < adapter->priv_num; i++)
 109                 kfree(adapter->priv[i]);
 110
 111         kfree(adapter);
 112
 113         return -1;
 114 }
 115
 116 /*
 117  * This function unregisters the device and performs all the necessary
 118  * cleanups.
 119  *
 120  * The following cleanup operations are performed -
 121  *      - Free the timers
 122  *      - Free beacon buffers
 123  *      - Free private structures
 124  *      - Free adapter structure
 125  */
 126 static int mwifiex_unregister(struct mwifiex_adapter *adapter)
 127 {
 128         s32 i;
 129
 130         if (adapter->if_ops.cleanup_if)
 131                 adapter->if_ops.cleanup_if(adapter);
 132
 133         del_timer_sync(&adapter->cmd_timer);
 134
 135         /* Free private structures */
 136         for (i = 0; i < adapter->priv_num; i++) {
 137                 if (adapter->priv[i]) {
 138                         mwifiex_free_curr_bcn(adapter->priv[i]);
 139                         kfree(adapter->priv[i]);
 140                 }
 141         }
 142
 143         if (adapter->nd_info) {
 144                 for (i = 0 ; i < adapter->nd_info->n_matches ; i++)
 145                         kfree(adapter->nd_info->matches[i]);
 146                 kfree(adapter->nd_info);
 147                 adapter->nd_info = NULL;
 148         }
 149
 150         kfree(adapter->regd);
 151
 152         vfree(adapter->chan_stats);
 153         kfree(adapter);
 154         return 0;
 155 }
 156
 157 void mwifiex_queue_main_work(struct mwifiex_adapter *adapter)
 158 {
 159         unsigned long flags;
 160
 161         spin_lock_irqsave(&adapter->main_proc_lock, flags);
 162         if (adapter->mwifiex_processing) {
 163                 adapter->more_task_flag = true;
 164                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 165         } else {
 166                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 167                 queue_work(adapter->workqueue, &adapter->main_work);
 168         }
 169 }
 170 EXPORT_SYMBOL_GPL(mwifiex_queue_main_work);
 171
 172 static void mwifiex_queue_rx_work(struct mwifiex_adapter *adapter)
 173 {
 174         unsigned long flags;
 175
 176         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 177         if (adapter->rx_processing) {
 178                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 179         } else {
 180                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 181                 queue_work(adapter->rx_workqueue, &adapter->rx_work);
 182         }
 183 }
 184
 185 static int mwifiex_process_rx(struct mwifiex_adapter *adapter)
 186 {
 187         unsigned long flags;
 188         struct sk_buff *skb;
 189         struct mwifiex_rxinfo *rx_info;
 190
 191         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 192         if (adapter->rx_processing || adapter->rx_locked) {
 193                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 194                 goto exit_rx_proc;
 195         } else {
 196                 adapter->rx_processing = true;
 197                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 198         }
 199
 200         /* Check for Rx data */
 201         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 202                 atomic_dec(&adapter->rx_pending);
 203                 if ((adapter->delay_main_work ||
 204                      adapter->iface_type == MWIFIEX_USB) &&
 205                     (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) {
 206                         if (adapter->if_ops.submit_rem_rx_urbs)
 207                                 adapter->if_ops.submit_rem_rx_urbs(adapter);
 208                         adapter->delay_main_work = false;
 209                         mwifiex_queue_main_work(adapter);
 210                 }
 211                 rx_info = MWIFIEX_SKB_RXCB(skb);
 212                 if (rx_info->buf_type == MWIFIEX_TYPE_AGGR_DATA) {
 213                         if (adapter->if_ops.deaggr_pkt)
 214                                 adapter->if_ops.deaggr_pkt(adapter, skb);
 215                         dev_kfree_skb_any(skb);
 216                 } else {
 217                         mwifiex_handle_rx_packet(adapter, skb);
 218                 }
 219         }
 220         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 221         adapter->rx_processing = false;
 222         spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 223
 224 exit_rx_proc:
 225         return 0;
 226 }
 227
 228 /*
 229  * The main process.
 230  *
 231  * This function is the main procedure of the driver and handles various driver
 232  * operations. It runs in a loop and provides the core functionalities.
 233  *
 234  * The main responsibilities of this function are -
 235  *      - Ensure concurrency control
 236  *      - Handle pending interrupts and call interrupt handlers
 237  *      - Wake up the card if required
 238  *      - Handle command responses and call response handlers
 239  *      - Handle events and call event handlers
 240  *      - Execute pending commands
 241  *      - Transmit pending data packets
 242  */
 243 int mwifiex_main_process(struct mwifiex_adapter *adapter)
 244 {
 245         int ret = 0;
 246         unsigned long flags;
 247
 248         spin_lock_irqsave(&adapter->main_proc_lock, flags);
 249
 250         /* Check if already processing */
 251         if (adapter->mwifiex_processing || adapter->main_locked) {
 252                 adapter->more_task_flag = true;
 253                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 254                 return 0;
 255         } else {
 256                 adapter->mwifiex_processing = true;
 257                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 258         }
 259 process_start:
 260         do {
 261                 if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 262                         break;
 263
 264                 /* For non-USB interfaces, If we process interrupts first, it
 265                  * would increase RX pending even further. Avoid this by
 266                  * checking if rx_pending has crossed high threshold and
 267                  * schedule rx work queue and then process interrupts.
 268                  * For USB interface, there are no interrupts. We already have
 269                  * HIGH_RX_PENDING check in usb.c
 270                  */
 271                 if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING &&
 272                     adapter->iface_type != MWIFIEX_USB) {
 273                         adapter->delay_main_work = true;
 274                         mwifiex_queue_rx_work(adapter);
 275                         break;
 276                 }
 277
 278                 /* Handle pending interrupt if any */
 279                 if (adapter->int_status) {
 280                         if (adapter->hs_activated)
 281                                 mwifiex_process_hs_config(adapter);
 282                         if (adapter->if_ops.process_int_status)
 283                                 adapter->if_ops.process_int_status(adapter);
 284                 }
 285
 286                 if (adapter->rx_work_enabled && adapter->data_received)
 287                         mwifiex_queue_rx_work(adapter);
 288
 289                 /* Need to wake up the card ? */
 290                 if ((adapter->ps_state == PS_STATE_SLEEP) &&
 291                     (adapter->pm_wakeup_card_req &&
 292                      !adapter->pm_wakeup_fw_try) &&
 293                     (is_command_pending(adapter) ||
 294                      !skb_queue_empty(&adapter->tx_data_q) ||
 295                      !mwifiex_bypass_txlist_empty(adapter) ||
 296                      !mwifiex_wmm_lists_empty(adapter))) {
 297                         adapter->pm_wakeup_fw_try = true;
 298                         mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3));
 299                         adapter->if_ops.wakeup(adapter);
 300                         continue;
 301                 }
 302
 303                 if (IS_CARD_RX_RCVD(adapter)) {
 304                         adapter->data_received = false;
 305                         adapter->pm_wakeup_fw_try = false;
 306                         del_timer(&adapter->wakeup_timer);
 307                         if (adapter->ps_state == PS_STATE_SLEEP)
 308                                 adapter->ps_state = PS_STATE_AWAKE;
 309                 } else {
 310                         /* We have tried to wakeup the card already */
 311                         if (adapter->pm_wakeup_fw_try)
 312                                 break;
 313                         if (adapter->ps_state == PS_STATE_PRE_SLEEP)
 314                                 mwifiex_check_ps_cond(adapter);
 315
 316                         if (adapter->ps_state != PS_STATE_AWAKE)
 317                                 break;
 318                         if (adapter->tx_lock_flag) {
 319                                 if (adapter->iface_type == MWIFIEX_USB) {
 320                                         if (!adapter->usb_mc_setup)
 321                                                 break;
 322                                 } else
 323                                         break;
 324                         }
 325
 326                         if ((!adapter->scan_chan_gap_enabled &&
 327                              adapter->scan_processing) || adapter->data_sent ||
 328                              mwifiex_is_tdls_chan_switching
 329                              (mwifiex_get_priv(adapter,
 330                                                MWIFIEX_BSS_ROLE_STA)) ||
 331                             (mwifiex_wmm_lists_empty(adapter) &&
 332                              mwifiex_bypass_txlist_empty(adapter) &&
 333                              skb_queue_empty(&adapter->tx_data_q))) {
 334                                 if (adapter->cmd_sent || adapter->curr_cmd ||
 335                                         !mwifiex_is_send_cmd_allowed
 336                                                 (mwifiex_get_priv(adapter,
 337                                                 MWIFIEX_BSS_ROLE_STA)) ||
 338                                     (!is_command_pending(adapter)))
 339                                         break;
 340                         }
 341                 }
 342
 343                 /* Check for event */
 344                 if (adapter->event_received) {
 345                         adapter->event_received = false;
 346                         mwifiex_process_event(adapter);
 347                 }
 348
 349                 /* Check for Cmd Resp */
 350                 if (adapter->cmd_resp_received) {
 351                         adapter->cmd_resp_received = false;
 352                         mwifiex_process_cmdresp(adapter);
 353
 354                         /* call mwifiex back when init_fw is done */
 355                         if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
 356                                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 357                                 mwifiex_init_fw_complete(adapter);
 358                         }
 359                 }
 360
 361                 /* Check if we need to confirm Sleep Request
 362                    received previously */
 363                 if (adapter->ps_state == PS_STATE_PRE_SLEEP)
 364                         mwifiex_check_ps_cond(adapter);
 365
 366                 /* * The ps_state may have been changed during processing of
 367                  * Sleep Request event.
 368                  */
 369                 if ((adapter->ps_state == PS_STATE_SLEEP) ||
 370                     (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
 371                     (adapter->ps_state == PS_STATE_SLEEP_CFM)) {
 372                         continue;
 373                 }
 374
 375                 if (adapter->tx_lock_flag) {
 376                         if (adapter->iface_type == MWIFIEX_USB) {
 377                                 if (!adapter->usb_mc_setup)
 378                                         continue;
 379                         } else
 380                                 continue;
 381                 }
 382
 383                 if (!adapter->cmd_sent && !adapter->curr_cmd &&
 384                     mwifiex_is_send_cmd_allowed
 385                     (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
 386                         if (mwifiex_exec_next_cmd(adapter) == -1) {
 387                                 ret = -1;
 388                                 break;
 389                         }
 390                 }
 391
 392                 /** If USB Multi channel setup ongoing,
 393                  *  wait for ready to tx data.
 394                  */
 395                 if (adapter->iface_type == MWIFIEX_USB &&
 396                     adapter->usb_mc_setup)
 397                         continue;
 398
 399                 if ((adapter->scan_chan_gap_enabled ||
 400                      !adapter->scan_processing) &&
 401                     !adapter->data_sent &&
 402                     !skb_queue_empty(&adapter->tx_data_q)) {
 403                         mwifiex_process_tx_queue(adapter);
 404                         if (adapter->hs_activated) {
 405                                 adapter->is_hs_configured = false;
 406                                 mwifiex_hs_activated_event
 407                                         (mwifiex_get_priv
 408                                         (adapter, MWIFIEX_BSS_ROLE_ANY),
 409                                         false);
 410                         }
 411                 }
 412
 413                 if ((adapter->scan_chan_gap_enabled ||
 414                      !adapter->scan_processing) &&
 415                     !adapter->data_sent &&
 416                     !mwifiex_bypass_txlist_empty(adapter) &&
 417                     !mwifiex_is_tdls_chan_switching
 418                         (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
 419                         mwifiex_process_bypass_tx(adapter);
 420                         if (adapter->hs_activated) {
 421                                 adapter->is_hs_configured = false;
 422                                 mwifiex_hs_activated_event
 423                                         (mwifiex_get_priv
 424                                          (adapter, MWIFIEX_BSS_ROLE_ANY),
 425                                          false);
 426                         }
 427                 }
 428
 429                 if ((adapter->scan_chan_gap_enabled ||
 430                      !adapter->scan_processing) &&
 431                     !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter) &&
 432                     !mwifiex_is_tdls_chan_switching
 433                         (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
 434                         mwifiex_wmm_process_tx(adapter);
 435                         if (adapter->hs_activated) {
 436                                 adapter->is_hs_configured = false;
 437                                 mwifiex_hs_activated_event
 438                                         (mwifiex_get_priv
 439                                          (adapter, MWIFIEX_BSS_ROLE_ANY),
 440                                          false);
 441                         }
 442                 }
 443
 444                 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
 445                     !adapter->curr_cmd && !is_command_pending(adapter) &&
 446                     (mwifiex_wmm_lists_empty(adapter) &&
 447                      mwifiex_bypass_txlist_empty(adapter) &&
 448                      skb_queue_empty(&adapter->tx_data_q))) {
 449                         if (!mwifiex_send_null_packet
 450                             (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
 451                              MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 452                              MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
 453                                 adapter->delay_null_pkt = false;
 454                                 adapter->ps_state = PS_STATE_SLEEP;
 455                         }
 456                         break;
 457                 }
 458         } while (true);
 459
 460         spin_lock_irqsave(&adapter->main_proc_lock, flags);
 461         if (adapter->more_task_flag) {
 462                 adapter->more_task_flag = false;
 463                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 464                 goto process_start;
 465         }
 466         adapter->mwifiex_processing = false;
 467         spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 468
 469         return ret;
 470 }
 471 EXPORT_SYMBOL_GPL(mwifiex_main_process);
 472
 473 /*
 474  * This function frees the adapter structure.
 475  *
 476  * Additionally, this closes the netlink socket, frees the timers
 477  * and private structures.
 478  */
 479 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
 480 {
 481         if (!adapter) {
 482                 pr_err("%s: adapter is NULL\n", __func__);
 483                 return;
 484         }
 485
 486         mwifiex_unregister(adapter);
 487         pr_debug("info: %s: free adapter\n", __func__);
 488 }
 489
 490 /*
 491  * This function cancels all works in the queue and destroys
 492  * the main workqueue.
 493  */
 494 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
 495 {
 496         if (adapter->workqueue) {
 497                 flush_workqueue(adapter->workqueue);
 498                 destroy_workqueue(adapter->workqueue);
 499                 adapter->workqueue = NULL;
 500         }
 501
 502         if (adapter->rx_workqueue) {
 503                 flush_workqueue(adapter->rx_workqueue);
 504                 destroy_workqueue(adapter->rx_workqueue);
 505                 adapter->rx_workqueue = NULL;
 506         }
 507 }
 508
 509 /*
 510  * This function gets firmware and initializes it.
 511  *
 512  * The main initialization steps followed are -
 513  *      - Download the correct firmware to card
 514  *      - Issue the init commands to firmware
 515  */
 516 static int _mwifiex_fw_dpc(const struct firmware *firmware, void *context)
 517 {
 518         int ret;
 519         char fmt[64];
 520         struct mwifiex_adapter *adapter = context;
 521         struct mwifiex_fw_image fw;
 522         bool init_failed = false;
 523         struct wireless_dev *wdev;
 524         struct completion *fw_done = adapter->fw_done;
 525
 526         if (!firmware) {
 527                 mwifiex_dbg(adapter, ERROR,
 528                             "Failed to get firmware %s\n", adapter->fw_name);
 529                 goto err_dnld_fw;
 530         }
 531
 532         memset(&fw, 0, sizeof(struct mwifiex_fw_image));
 533         adapter->firmware = firmware;
 534         fw.fw_buf = (u8 *) adapter->firmware->data;
 535         fw.fw_len = adapter->firmware->size;
 536
 537         if (adapter->if_ops.dnld_fw) {
 538                 ret = adapter->if_ops.dnld_fw(adapter, &fw);
 539         } else {
 540                 ret = mwifiex_dnld_fw(adapter, &fw);
 541         }
 542
 543         if (ret == -1)
 544                 goto err_dnld_fw;
 545
 546         mwifiex_dbg(adapter, MSG, "WLAN FW is active\n");
 547
 548         if (cal_data_cfg) {
 549                 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
 550                                       adapter->dev)) < 0)
 551                         mwifiex_dbg(adapter, ERROR,
 552                                     "Cal data request_firmware() failed\n");
 553         }
 554
 555         /* enable host interrupt after fw dnld is successful */
 556         if (adapter->if_ops.enable_int) {
 557                 if (adapter->if_ops.enable_int(adapter))
 558                         goto err_dnld_fw;
 559         }
 560
 561         adapter->init_wait_q_woken = false;
 562         ret = mwifiex_init_fw(adapter);
 563         if (ret == -1) {
 564                 goto err_init_fw;
 565         } else if (!ret) {
 566                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 567                 goto done;
 568         }
 569         /* Wait for mwifiex_init to complete */
 570         if (!adapter->mfg_mode) {
 571                 wait_event_interruptible(adapter->init_wait_q,
 572                                          adapter->init_wait_q_woken);
 573                 if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
 574                         goto err_init_fw;
 575         }
 576
 577         if (!adapter->wiphy) {
 578                 if (mwifiex_register_cfg80211(adapter)) {
 579                         mwifiex_dbg(adapter, ERROR,
 580                                     "cannot register with cfg80211\n");
 581                         goto err_init_fw;
 582                 }
 583         }
 584
 585         if (mwifiex_init_channel_scan_gap(adapter)) {
 586                 mwifiex_dbg(adapter, ERROR,
 587                             "could not init channel stats table\n");
 588                 goto err_init_fw;
 589         }
 590
 591         if (driver_mode) {
 592                 driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK;
 593                 driver_mode |= MWIFIEX_DRIVER_MODE_STA;
 594         }
 595
 596         rtnl_lock();
 597         /* Create station interface by default */
 598         wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NET_NAME_ENUM,
 599                                         NL80211_IFTYPE_STATION, NULL, NULL);
 600         if (IS_ERR(wdev)) {
 601                 mwifiex_dbg(adapter, ERROR,
 602                             "cannot create default STA interface\n");
 603                 rtnl_unlock();
 604                 goto err_add_intf;
 605         }
 606
 607         if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) {
 608                 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d", NET_NAME_ENUM,
 609                                                 NL80211_IFTYPE_AP, NULL, NULL);
 610                 if (IS_ERR(wdev)) {
 611                         mwifiex_dbg(adapter, ERROR,
 612                                     "cannot create AP interface\n");
 613                         rtnl_unlock();
 614                         goto err_add_intf;
 615                 }
 616         }
 617
 618         if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) {
 619                 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d", NET_NAME_ENUM,
 620                                                 NL80211_IFTYPE_P2P_CLIENT, NULL,
 621                                                 NULL);
 622                 if (IS_ERR(wdev)) {
 623                         mwifiex_dbg(adapter, ERROR,
 624                                     "cannot create p2p client interface\n");
 625                         rtnl_unlock();
 626                         goto err_add_intf;
 627                 }
 628         }
 629         rtnl_unlock();
 630
 631         mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
 632         mwifiex_dbg(adapter, MSG, "driver_version = %s\n", fmt);
 633         goto done;
 634
 635 err_add_intf:
 636         wiphy_unregister(adapter->wiphy);
 637         wiphy_free(adapter->wiphy);
 638 err_init_fw:
 639         if (adapter->if_ops.disable_int)
 640                 adapter->if_ops.disable_int(adapter);
 641 err_dnld_fw:
 642         mwifiex_dbg(adapter, ERROR,
 643                     "info: %s: unregister device\n", __func__);
 644         if (adapter->if_ops.unregister_dev)
 645                 adapter->if_ops.unregister_dev(adapter);
 646
 647         adapter->surprise_removed = true;
 648         mwifiex_terminate_workqueue(adapter);
 649
 650         if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
 651                 pr_debug("info: %s: shutdown mwifiex\n", __func__);
 652                 mwifiex_shutdown_drv(adapter);
 653         }
 654
 655         init_failed = true;
 656 done:
 657         if (adapter->cal_data) {
 658                 release_firmware(adapter->cal_data);
 659                 adapter->cal_data = NULL;
 660         }
 661         if (adapter->firmware) {
 662                 release_firmware(adapter->firmware);
 663                 adapter->firmware = NULL;
 664         }
 665         if (init_failed)
 666                 mwifiex_free_adapter(adapter);
 667         /* Tell all current and future waiters we're finished */
 668         complete_all(fw_done);
 669
 670         return init_failed ? -EIO : 0;
 671 }
 672
 673 static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
 674 {
 675         _mwifiex_fw_dpc(firmware, context);
 676 }
 677
 678 /*
 679  * This function gets the firmware and (if called asynchronously) kicks off the
 680  * HW init when done.
 681  */
 682 static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter,
 683                               bool req_fw_nowait)
 684 {
 685         int ret;
 686
 687         /* Override default firmware with manufacturing one if
 688          * manufacturing mode is enabled
 689          */
 690         if (mfg_mode) {
 691                 if (strlcpy(adapter->fw_name, MFG_FIRMWARE,
 692                             sizeof(adapter->fw_name)) >=
 693                             sizeof(adapter->fw_name)) {
 694                         pr_err("%s: fw_name too long!\n", __func__);
 695                         return -1;
 696                 }
 697         }
 698
 699         if (req_fw_nowait) {
 700                 ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
 701                                               adapter->dev, GFP_KERNEL, adapter,
 702                                               mwifiex_fw_dpc);
 703         } else {
 704                 ret = request_firmware(&adapter->firmware,
 705                                        adapter->fw_name,
 706                                        adapter->dev);
 707         }
 708
 709         if (ret < 0)
 710                 mwifiex_dbg(adapter, ERROR, "request_firmware%s error %d\n",
 711                             req_fw_nowait ? "_nowait" : "", ret);
 712         return ret;
 713 }
 714
 715 /*
 716  * CFG802.11 network device handler for open.
 717  *
 718  * Starts the data queue.
 719  */
 720 static int
 721 mwifiex_open(struct net_device *dev)
 722 {
 723         netif_carrier_off(dev);
 724
 725         return 0;
 726 }
 727
 728 /*
 729  * CFG802.11 network device handler for close.
 730  */
 731 static int
 732 mwifiex_close(struct net_device *dev)
 733 {
 734         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 735
 736         if (priv->scan_request) {
 737                 struct cfg80211_scan_info info = {
 738                         .aborted = true,
 739                 };
 740
 741                 mwifiex_dbg(priv->adapter, INFO,
 742                             "aborting scan on ndo_stop\n");
 743                 cfg80211_scan_done(priv->scan_request, &info);
 744                 priv->scan_request = NULL;
 745                 priv->scan_aborting = true;
 746         }
 747
 748         if (priv->sched_scanning) {
 749                 mwifiex_dbg(priv->adapter, INFO,
 750                             "aborting bgscan on ndo_stop\n");
 751                 mwifiex_stop_bg_scan(priv);
 752                 cfg80211_sched_scan_stopped(priv->wdev.wiphy);
 753         }
 754
 755         return 0;
 756 }
 757
 758 static bool
 759 mwifiex_bypass_tx_queue(struct mwifiex_private *priv,
 760                         struct sk_buff *skb)
 761 {
 762         struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
 763
 764         if (ntohs(eth_hdr->h_proto) == ETH_P_PAE ||
 765             mwifiex_is_skb_mgmt_frame(skb) ||
 766             (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
 767              ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
 768              (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) {
 769                 mwifiex_dbg(priv->adapter, DATA,
 770                             "bypass txqueue; eth type %#x, mgmt %d\n",
 771                              ntohs(eth_hdr->h_proto),
 772                              mwifiex_is_skb_mgmt_frame(skb));
 773                 return true;
 774         }
 775
 776         return false;
 777 }
 778 /*
 779  * Add buffer into wmm tx queue and queue work to transmit it.
 780  */
 781 int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
 782 {
 783         struct netdev_queue *txq;
 784         int index = mwifiex_1d_to_wmm_queue[skb->priority];
 785
 786         if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
 787                 txq = netdev_get_tx_queue(priv->netdev, index);
 788                 if (!netif_tx_queue_stopped(txq)) {
 789                         netif_tx_stop_queue(txq);
 790                         mwifiex_dbg(priv->adapter, DATA,
 791                                     "stop queue: %d\n", index);
 792                 }
 793         }
 794
 795         if (mwifiex_bypass_tx_queue(priv, skb)) {
 796                 atomic_inc(&priv->adapter->tx_pending);
 797                 atomic_inc(&priv->adapter->bypass_tx_pending);
 798                 mwifiex_wmm_add_buf_bypass_txqueue(priv, skb);
 799          } else {
 800                 atomic_inc(&priv->adapter->tx_pending);
 801                 mwifiex_wmm_add_buf_txqueue(priv, skb);
 802          }
 803
 804         mwifiex_queue_main_work(priv->adapter);
 805
 806         return 0;
 807 }
 808
 809 struct sk_buff *
 810 mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv,
 811                                 struct sk_buff *skb, u8 flag, u64 *cookie)
 812 {
 813         struct sk_buff *orig_skb = skb;
 814         struct mwifiex_txinfo *tx_info, *orig_tx_info;
 815
 816         skb = skb_clone(skb, GFP_ATOMIC);
 817         if (skb) {
 818                 unsigned long flags;
 819                 int id;
 820
 821                 spin_lock_irqsave(&priv->ack_status_lock, flags);
 822                 id = idr_alloc(&priv->ack_status_frames, orig_skb,
 823                                1, 0x10, GFP_ATOMIC);
 824                 spin_unlock_irqrestore(&priv->ack_status_lock, flags);
 825
 826                 if (id >= 0) {
 827                         tx_info = MWIFIEX_SKB_TXCB(skb);
 828                         tx_info->ack_frame_id = id;
 829                         tx_info->flags |= flag;
 830                         orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb);
 831                         orig_tx_info->ack_frame_id = id;
 832                         orig_tx_info->flags |= flag;
 833
 834                         if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie)
 835                                 orig_tx_info->cookie = *cookie;
 836
 837                 } else if (skb_shared(skb)) {
 838                         kfree_skb(orig_skb);
 839                 } else {
 840                         kfree_skb(skb);
 841                         skb = orig_skb;
 842                 }
 843         } else {
 844                 /* couldn't clone -- lose tx status ... */
 845                 skb = orig_skb;
 846         }
 847
 848         return skb;
 849 }
 850
 851 /*
 852  * CFG802.11 network device handler for data transmission.
 853  */
 854 static int
 855 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 856 {
 857         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 858         struct sk_buff *new_skb;
 859         struct mwifiex_txinfo *tx_info;
 860         bool multicast;
 861
 862         mwifiex_dbg(priv->adapter, DATA,
 863                     "data: %lu BSS(%d-%d): Data <= kernel\n",
 864                     jiffies, priv->bss_type, priv->bss_num);
 865
 866         if (priv->adapter->surprise_removed) {
 867                 kfree_skb(skb);
 868                 priv->stats.tx_dropped++;
 869                 return 0;
 870         }
 871         if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
 872                 mwifiex_dbg(priv->adapter, ERROR,
 873                             "Tx: bad skb len %d\n", skb->len);
 874                 kfree_skb(skb);
 875                 priv->stats.tx_dropped++;
 876                 return 0;
 877         }
 878         if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
 879                 mwifiex_dbg(priv->adapter, DATA,
 880                             "data: Tx: insufficient skb headroom %d\n",
 881                             skb_headroom(skb));
 882                 /* Insufficient skb headroom - allocate a new skb */
 883                 new_skb =
 884                         skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
 885                 if (unlikely(!new_skb)) {
 886                         mwifiex_dbg(priv->adapter, ERROR,
 887                                     "Tx: cannot alloca new_skb\n");
 888                         kfree_skb(skb);
 889                         priv->stats.tx_dropped++;
 890                         return 0;
 891                 }
 892                 kfree_skb(skb);
 893                 skb = new_skb;
 894                 mwifiex_dbg(priv->adapter, INFO,
 895                             "info: new skb headroomd %d\n",
 896                             skb_headroom(skb));
 897         }
 898
 899         tx_info = MWIFIEX_SKB_TXCB(skb);
 900         memset(tx_info, 0, sizeof(*tx_info));
 901         tx_info->bss_num = priv->bss_num;
 902         tx_info->bss_type = priv->bss_type;
 903         tx_info->pkt_len = skb->len;
 904
 905         multicast = is_multicast_ether_addr(skb->data);
 906
 907         if (unlikely(!multicast && skb->sk &&
 908                      skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS &&
 909                      priv->adapter->fw_api_ver == MWIFIEX_FW_V15))
 910                 skb = mwifiex_clone_skb_for_tx_status(priv,
 911                                                       skb,
 912                                         MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL);
 913
 914         /* Record the current time the packet was queued; used to
 915          * determine the amount of time the packet was queued in
 916          * the driver before it was sent to the firmware.
 917          * The delay is then sent along with the packet to the
 918          * firmware for aggregate delay calculation for stats and
 919          * MSDU lifetime expiry.
 920          */
 921         __net_timestamp(skb);
 922
 923         if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
 924             priv->bss_type == MWIFIEX_BSS_TYPE_STA &&
 925             !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) {
 926                 if (priv->adapter->auto_tdls && priv->check_tdls_tx)
 927                         mwifiex_tdls_check_tx(priv, skb);
 928         }
 929
 930         mwifiex_queue_tx_pkt(priv, skb);
 931
 932         return 0;
 933 }
 934
 935 /*
 936  * CFG802.11 network device handler for setting MAC address.
 937  */
 938 static int
 939 mwifiex_set_mac_address(struct net_device *dev, void *addr)
 940 {
 941         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 942         struct sockaddr *hw_addr = addr;
 943         int ret;
 944
 945         memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
 946
 947         /* Send request to firmware */
 948         ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
 949                                HostCmd_ACT_GEN_SET, 0, NULL, true);
 950
 951         if (!ret)
 952                 memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
 953         else
 954                 mwifiex_dbg(priv->adapter, ERROR,
 955                             "set mac address failed: ret=%d\n", ret);
 956
 957         memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
 958
 959         return ret;
 960 }
 961
 962 /*
 963  * CFG802.11 network device handler for setting multicast list.
 964  */
 965 static void mwifiex_set_multicast_list(struct net_device *dev)
 966 {
 967         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 968         struct mwifiex_multicast_list mcast_list;
 969
 970         if (dev->flags & IFF_PROMISC) {
 971                 mcast_list.mode = MWIFIEX_PROMISC_MODE;
 972         } else if (dev->flags & IFF_ALLMULTI ||
 973                    netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
 974                 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
 975         } else {
 976                 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
 977                 mcast_list.num_multicast_addr =
 978                         mwifiex_copy_mcast_addr(&mcast_list, dev);
 979         }
 980         mwifiex_request_set_multicast_list(priv, &mcast_list);
 981 }
 982
 983 /*
 984  * CFG802.11 network device handler for transmission timeout.
 985  */
 986 static void
 987 mwifiex_tx_timeout(struct net_device *dev)
 988 {
 989         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 990
 991         priv->num_tx_timeout++;
 992         priv->tx_timeout_cnt++;
 993         mwifiex_dbg(priv->adapter, ERROR,
 994                     "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
 995                     jiffies, priv->tx_timeout_cnt, priv->bss_type,
 996                     priv->bss_num);
 997         mwifiex_set_trans_start(dev);
 998
 999         if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
1000             priv->adapter->if_ops.card_reset) {
1001                 mwifiex_dbg(priv->adapter, ERROR,
1002                             "tx_timeout_cnt exceeds threshold.\t"
1003                             "Triggering card reset!\n");
1004                 priv->adapter->if_ops.card_reset(priv->adapter);
1005         }
1006 }
1007
1008 void mwifiex_multi_chan_resync(struct mwifiex_adapter *adapter)
1009 {
1010         struct usb_card_rec *card = adapter->card;
1011         struct mwifiex_private *priv;
1012         u16 tx_buf_size;
1013         int i, ret;
1014
1015         card->mc_resync_flag = true;
1016         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
1017                 if (atomic_read(&card->port[i].tx_data_urb_pending)) {
1018                         mwifiex_dbg(adapter, WARN, "pending data urb in sys\n");
1019                         return;
1020                 }
1021         }
1022
1023         card->mc_resync_flag = false;
1024         tx_buf_size = 0xffff;
1025         priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
1026         ret = mwifiex_send_cmd(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF,
1027                                HostCmd_ACT_GEN_SET, 0, &tx_buf_size, false);
1028         if (ret)
1029                 mwifiex_dbg(adapter, ERROR,
1030                             "send reconfig tx buf size cmd err\n");
1031 }
1032 EXPORT_SYMBOL_GPL(mwifiex_multi_chan_resync);
1033
1034 int mwifiex_drv_info_dump(struct mwifiex_adapter *adapter, void **drv_info)
1035 {
1036         void *p;
1037         char drv_version[64];
1038         struct usb_card_rec *cardp;
1039         struct sdio_mmc_card *sdio_card;
1040         struct mwifiex_private *priv;
1041         int i, idx;
1042         struct netdev_queue *txq;
1043         struct mwifiex_debug_info *debug_info;
1044         void *drv_info_dump;
1045
1046         mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump start===\n");
1047
1048         /* memory allocate here should be free in mwifiex_upload_device_dump*/
1049         drv_info_dump = vzalloc(MWIFIEX_DRV_INFO_SIZE_MAX);
1050
1051         if (!drv_info_dump)
1052                 return 0;
1053
1054         p = (char *)(drv_info_dump);
1055         p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
1056
1057         mwifiex_drv_get_driver_version(adapter, drv_version,
1058                                        sizeof(drv_version) - 1);
1059         p += sprintf(p, "driver_version = %s\n", drv_version);
1060
1061         if (adapter->iface_type == MWIFIEX_USB) {
1062                 cardp = (struct usb_card_rec *)adapter->card;
1063                 p += sprintf(p, "tx_cmd_urb_pending = %d\n",
1064                              atomic_read(&cardp->tx_cmd_urb_pending));
1065                 p += sprintf(p, "tx_data_urb_pending_port_0 = %d\n",
1066                              atomic_read(&cardp->port[0].tx_data_urb_pending));
1067                 p += sprintf(p, "tx_data_urb_pending_port_1 = %d\n",
1068                              atomic_read(&cardp->port[1].tx_data_urb_pending));
1069                 p += sprintf(p, "rx_cmd_urb_pending = %d\n",
1070                              atomic_read(&cardp->rx_cmd_urb_pending));
1071                 p += sprintf(p, "rx_data_urb_pending = %d\n",
1072                              atomic_read(&cardp->rx_data_urb_pending));
1073         }
1074
1075         p += sprintf(p, "tx_pending = %d\n",
1076                      atomic_read(&adapter->tx_pending));
1077         p += sprintf(p, "rx_pending = %d\n",
1078                      atomic_read(&adapter->rx_pending));
1079
1080         if (adapter->iface_type == MWIFIEX_SDIO) {
1081                 sdio_card = (struct sdio_mmc_card *)adapter->card;
1082                 p += sprintf(p, "\nmp_rd_bitmap=0x%x curr_rd_port=0x%x\n",
1083                              sdio_card->mp_rd_bitmap, sdio_card->curr_rd_port);
1084                 p += sprintf(p, "mp_wr_bitmap=0x%x curr_wr_port=0x%x\n",
1085                              sdio_card->mp_wr_bitmap, sdio_card->curr_wr_port);
1086         }
1087
1088         for (i = 0; i < adapter->priv_num; i++) {
1089                 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
1090                         continue;
1091                 priv = adapter->priv[i];
1092                 p += sprintf(p, "\n[interface  : \"%s\"]\n",
1093                              priv->netdev->name);
1094                 p += sprintf(p, "wmm_tx_pending[0] = %d\n",
1095                              atomic_read(&priv->wmm_tx_pending[0]));
1096                 p += sprintf(p, "wmm_tx_pending[1] = %d\n",
1097                              atomic_read(&priv->wmm_tx_pending[1]));
1098                 p += sprintf(p, "wmm_tx_pending[2] = %d\n",
1099                              atomic_read(&priv->wmm_tx_pending[2]));
1100                 p += sprintf(p, "wmm_tx_pending[3] = %d\n",
1101                              atomic_read(&priv->wmm_tx_pending[3]));
1102                 p += sprintf(p, "media_state=\"%s\"\n", !priv->media_connected ?
1103                              "Disconnected" : "Connected");
1104                 p += sprintf(p, "carrier %s\n", (netif_carrier_ok(priv->netdev)
1105                              ? "on" : "off"));
1106                 for (idx = 0; idx < priv->netdev->num_tx_queues; idx++) {
1107                         txq = netdev_get_tx_queue(priv->netdev, idx);
1108                         p += sprintf(p, "tx queue %d:%s  ", idx,
1109                                      netif_tx_queue_stopped(txq) ?
1110                                      "stopped" : "started");
1111                 }
1112                 p += sprintf(p, "\n%s: num_tx_timeout = %d\n",
1113                              priv->netdev->name, priv->num_tx_timeout);
1114         }
1115
1116         if (adapter->iface_type == MWIFIEX_SDIO ||
1117             adapter->iface_type == MWIFIEX_PCIE) {
1118                 p += sprintf(p, "\n=== %s register dump===\n",
1119                              adapter->iface_type == MWIFIEX_SDIO ?
1120                                                         "SDIO" : "PCIE");
1121                 if (adapter->if_ops.reg_dump)
1122                         p += adapter->if_ops.reg_dump(adapter, p);
1123         }
1124         p += sprintf(p, "\n=== more debug information\n");
1125         debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL);
1126         if (debug_info) {
1127                 for (i = 0; i < adapter->priv_num; i++) {
1128                         if (!adapter->priv[i] || !adapter->priv[i]->netdev)
1129                                 continue;
1130                         priv = adapter->priv[i];
1131                         mwifiex_get_debug_info(priv, debug_info);
1132                         p += mwifiex_debug_info_to_buffer(priv, p, debug_info);
1133                         break;
1134                 }
1135                 kfree(debug_info);
1136         }
1137
1138         mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump end===\n");
1139         *drv_info = drv_info_dump;
1140         return p - drv_info_dump;
1141 }
1142 EXPORT_SYMBOL_GPL(mwifiex_drv_info_dump);
1143
1144 void mwifiex_upload_device_dump(struct mwifiex_adapter *adapter, void *drv_info,
1145                                 int drv_info_size)
1146 {
1147         u8 idx, *dump_data, *fw_dump_ptr;
1148         u32 dump_len;
1149
1150         dump_len = (strlen("========Start dump driverinfo========\n") +
1151                        drv_info_size +
1152                        strlen("\n========End dump========\n"));
1153
1154         for (idx = 0; idx < adapter->num_mem_types; idx++) {
1155                 struct memory_type_mapping *entry =
1156                                 &adapter->mem_type_mapping_tbl[idx];
1157
1158                 if (entry->mem_ptr) {
1159                         dump_len += (strlen("========Start dump ") +
1160                                         strlen(entry->mem_name) +
1161                                         strlen("========\n") +
1162                                         (entry->mem_size + 1) +
1163                                         strlen("\n========End dump========\n"));
1164                 }
1165         }
1166
1167         dump_data = vzalloc(dump_len + 1);
1168         if (!dump_data)
1169                 goto done;
1170
1171         fw_dump_ptr = dump_data;
1172
1173         /* Dump all the memory data into single file, a userspace script will
1174          * be used to split all the memory data to multiple files
1175          */
1176         mwifiex_dbg(adapter, MSG,
1177                     "== mwifiex dump information to /sys/class/devcoredump start");
1178
1179         strcpy(fw_dump_ptr, "========Start dump driverinfo========\n");
1180         fw_dump_ptr += strlen("========Start dump driverinfo========\n");
1181         memcpy(fw_dump_ptr, drv_info, drv_info_size);
1182         fw_dump_ptr += drv_info_size;
1183         strcpy(fw_dump_ptr, "\n========End dump========\n");
1184         fw_dump_ptr += strlen("\n========End dump========\n");
1185
1186         for (idx = 0; idx < adapter->num_mem_types; idx++) {
1187                 struct memory_type_mapping *entry =
1188                                         &adapter->mem_type_mapping_tbl[idx];
1189
1190                 if (entry->mem_ptr) {
1191                         strcpy(fw_dump_ptr, "========Start dump ");
1192                         fw_dump_ptr += strlen("========Start dump ");
1193
1194                         strcpy(fw_dump_ptr, entry->mem_name);
1195                         fw_dump_ptr += strlen(entry->mem_name);
1196
1197                         strcpy(fw_dump_ptr, "========\n");
1198                         fw_dump_ptr += strlen("========\n");
1199
1200                         memcpy(fw_dump_ptr, entry->mem_ptr, entry->mem_size);
1201                         fw_dump_ptr += entry->mem_size;
1202
1203                         strcpy(fw_dump_ptr, "\n========End dump========\n");
1204                         fw_dump_ptr += strlen("\n========End dump========\n");
1205                 }
1206         }
1207
1208         /* device dump data will be free in device coredump release function
1209          * after 5 min
1210          */
1211         dev_coredumpv(adapter->dev, dump_data, dump_len, GFP_KERNEL);
1212         mwifiex_dbg(adapter, MSG,
1213                     "== mwifiex dump information to /sys/class/devcoredump end");
1214
1215 done:
1216         for (idx = 0; idx < adapter->num_mem_types; idx++) {
1217                 struct memory_type_mapping *entry =
1218                         &adapter->mem_type_mapping_tbl[idx];
1219
1220                 vfree(entry->mem_ptr);
1221                 entry->mem_ptr = NULL;
1222                 entry->mem_size = 0;
1223         }
1224
1225         vfree(drv_info);
1226 }
1227 EXPORT_SYMBOL_GPL(mwifiex_upload_device_dump);
1228
1229 /*
1230  * CFG802.11 network device handler for statistics retrieval.
1231  */
1232 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
1233 {
1234         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1235
1236         return &priv->stats;
1237 }
1238
1239 static u16
1240 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
1241                                 void *accel_priv, select_queue_fallback_t fallback)
1242 {
1243         skb->priority = cfg80211_classify8021d(skb, NULL);
1244         return mwifiex_1d_to_wmm_queue[skb->priority];
1245 }
1246
1247 /* Network device handlers */
1248 static const struct net_device_ops mwifiex_netdev_ops = {
1249         .ndo_open = mwifiex_open,
1250         .ndo_stop = mwifiex_close,
1251         .ndo_start_xmit = mwifiex_hard_start_xmit,
1252         .ndo_set_mac_address = mwifiex_set_mac_address,
1253         .ndo_validate_addr = eth_validate_addr,
1254         .ndo_tx_timeout = mwifiex_tx_timeout,
1255         .ndo_get_stats = mwifiex_get_stats,
1256         .ndo_set_rx_mode = mwifiex_set_multicast_list,
1257         .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
1258 };
1259
1260 /*
1261  * This function initializes the private structure parameters.
1262  *
1263  * The following wait queues are initialized -
1264  *      - IOCTL wait queue
1265  *      - Command wait queue
1266  *      - Statistics wait queue
1267  *
1268  * ...and the following default parameters are set -
1269  *      - Current key index     : Set to 0
1270  *      - Rate index            : Set to auto
1271  *      - Media connected       : Set to disconnected
1272  *      - Adhoc link sensed     : Set to false
1273  *      - Nick name             : Set to null
1274  *      - Number of Tx timeout  : Set to 0
1275  *      - Device address        : Set to current address
1276  *      - Rx histogram statistc : Set to 0
1277  *
1278  * In addition, the CFG80211 work queue is also created.
1279  */
1280 void mwifiex_init_priv_params(struct mwifiex_private *priv,
1281                               struct net_device *dev)
1282 {
1283         dev->netdev_ops = &mwifiex_netdev_ops;
1284         dev->destructor = free_netdev;
1285         /* Initialize private structure */
1286         priv->current_key_index = 0;
1287         priv->media_connected = false;
1288         memset(priv->mgmt_ie, 0,
1289                sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
1290         priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
1291         priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
1292         priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
1293         priv->gen_idx = MWIFIEX_AUTO_IDX_MASK;
1294         priv->num_tx_timeout = 0;
1295         ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr);
1296         memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
1297
1298         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
1299             GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
1300                 priv->hist_data = kmalloc(sizeof(*priv->hist_data), GFP_KERNEL);
1301                 if (priv->hist_data)
1302                         mwifiex_hist_data_reset(priv);
1303         }
1304 }
1305
1306 /*
1307  * This function check if command is pending.
1308  */
1309 int is_command_pending(struct mwifiex_adapter *adapter)
1310 {
1311         unsigned long flags;
1312         int is_cmd_pend_q_empty;
1313
1314         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
1315         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
1316         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
1317
1318         return !is_cmd_pend_q_empty;
1319 }
1320
1321 /*
1322  * This is the RX work queue function.
1323  *
1324  * It handles the RX operations.
1325  */
1326 static void mwifiex_rx_work_queue(struct work_struct *work)
1327 {
1328         struct mwifiex_adapter *adapter =
1329                 container_of(work, struct mwifiex_adapter, rx_work);
1330
1331         if (adapter->surprise_removed)
1332                 return;
1333         mwifiex_process_rx(adapter);
1334 }
1335
1336 /*
1337  * This is the main work queue function.
1338  *
1339  * It handles the main process, which in turn handles the complete
1340  * driver operations.
1341  */
1342 static void mwifiex_main_work_queue(struct work_struct *work)
1343 {
1344         struct mwifiex_adapter *adapter =
1345                 container_of(work, struct mwifiex_adapter, main_work);
1346
1347         if (adapter->surprise_removed)
1348                 return;
1349         mwifiex_main_process(adapter);
1350 }
1351
1352 /*
1353  * This function gets called during PCIe function level reset. Required
1354  * code is extracted from mwifiex_remove_card()
1355  */
1356 int
1357 mwifiex_shutdown_sw(struct mwifiex_adapter *adapter)
1358 {
1359         struct mwifiex_private *priv;
1360         int i;
1361
1362         if (!adapter)
1363                 goto exit_return;
1364
1365         wait_for_completion(adapter->fw_done);
1366         /* Caller should ensure we aren't suspending while this happens */
1367         reinit_completion(adapter->fw_done);
1368
1369         priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
1370         mwifiex_deauthenticate(priv, NULL);
1371
1372         /* We can no longer handle interrupts once we start doing the teardown
1373          * below.
1374          */
1375         if (adapter->if_ops.disable_int)
1376                 adapter->if_ops.disable_int(adapter);
1377
1378         adapter->surprise_removed = true;
1379         mwifiex_terminate_workqueue(adapter);
1380
1381         /* Stop data */
1382         for (i = 0; i < adapter->priv_num; i++) {
1383                 priv = adapter->priv[i];
1384                 if (priv && priv->netdev) {
1385                         mwifiex_stop_net_dev_queue(priv->netdev, adapter);
1386                         if (netif_carrier_ok(priv->netdev))
1387                                 netif_carrier_off(priv->netdev);
1388                         netif_device_detach(priv->netdev);
1389                 }
1390         }
1391
1392         mwifiex_dbg(adapter, CMD, "cmd: calling mwifiex_shutdown_drv...\n");
1393
1394         mwifiex_shutdown_drv(adapter);
1395         if (adapter->if_ops.down_dev)
1396                 adapter->if_ops.down_dev(adapter);
1397
1398         mwifiex_dbg(adapter, CMD, "cmd: mwifiex_shutdown_drv done\n");
1399         if (atomic_read(&adapter->rx_pending) ||
1400             atomic_read(&adapter->tx_pending) ||
1401             atomic_read(&adapter->cmd_pending)) {
1402                 mwifiex_dbg(adapter, ERROR,
1403                             "rx_pending=%d, tx_pending=%d,\t"
1404                             "cmd_pending=%d\n",
1405                             atomic_read(&adapter->rx_pending),
1406                             atomic_read(&adapter->tx_pending),
1407                             atomic_read(&adapter->cmd_pending));
1408         }
1409
1410         for (i = 0; i < adapter->priv_num; i++) {
1411                 priv = adapter->priv[i];
1412                 if (!priv)
1413                         continue;
1414                 rtnl_lock();
1415                 if (priv->netdev &&
1416                     priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
1417                         mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
1418                 rtnl_unlock();
1419         }
1420
1421         mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__);
1422 exit_return:
1423         return 0;
1424 }
1425 EXPORT_SYMBOL_GPL(mwifiex_shutdown_sw);
1426
1427 /* This function gets called during PCIe function level reset. Required
1428  * code is extracted from mwifiex_add_card()
1429  */
1430 int
1431 mwifiex_reinit_sw(struct mwifiex_adapter *adapter)
1432 {
1433         int ret;
1434
1435         mwifiex_init_lock_list(adapter);
1436         if (adapter->if_ops.up_dev)
1437                 adapter->if_ops.up_dev(adapter);
1438
1439         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
1440         adapter->surprise_removed = false;
1441         init_waitqueue_head(&adapter->init_wait_q);
1442         adapter->is_suspended = false;
1443         adapter->hs_activated = false;
1444         adapter->is_cmd_timedout = 0;
1445         init_waitqueue_head(&adapter->hs_activate_wait_q);
1446         init_waitqueue_head(&adapter->cmd_wait_q.wait);
1447         adapter->cmd_wait_q.status = 0;
1448         adapter->scan_wait_q_woken = false;
1449
1450         if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB)
1451                 adapter->rx_work_enabled = true;
1452
1453         adapter->workqueue =
1454                 alloc_workqueue("MWIFIEX_WORK_QUEUE",
1455                                 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
1456         if (!adapter->workqueue)
1457                 goto err_kmalloc;
1458
1459         INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
1460
1461         if (adapter->rx_work_enabled) {
1462                 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
1463                                                         WQ_HIGHPRI |
1464                                                         WQ_MEM_RECLAIM |
1465                                                         WQ_UNBOUND, 1);
1466                 if (!adapter->rx_workqueue)
1467                         goto err_kmalloc;
1468                 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
1469         }
1470
1471         /* Register the device. Fill up the private data structure with
1472          * relevant information from the card. Some code extracted from
1473          * mwifiex_register_dev()
1474          */
1475         mwifiex_dbg(adapter, INFO, "%s, mwifiex_init_hw_fw()...\n", __func__);
1476
1477         if (mwifiex_init_hw_fw(adapter, false)) {
1478                 mwifiex_dbg(adapter, ERROR,
1479                             "%s: firmware init failed\n", __func__);
1480                 goto err_init_fw;
1481         }
1482
1483         /* _mwifiex_fw_dpc() does its own cleanup */
1484         ret = _mwifiex_fw_dpc(adapter->firmware, adapter);
1485         if (ret) {
1486                 pr_err("Failed to bring up adapter: %d\n", ret);
1487                 return ret;
1488         }
1489         mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__);
1490
1491         return 0;
1492
1493 err_init_fw:
1494         mwifiex_dbg(adapter, ERROR, "info: %s: unregister device\n", __func__);
1495         if (adapter->if_ops.unregister_dev)
1496                 adapter->if_ops.unregister_dev(adapter);
1497
1498 err_kmalloc:
1499         adapter->surprise_removed = true;
1500         mwifiex_terminate_workqueue(adapter);
1501         if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
1502                 mwifiex_dbg(adapter, ERROR,
1503                             "info: %s: shutdown mwifiex\n", __func__);
1504                 mwifiex_shutdown_drv(adapter);
1505         }
1506
1507         complete_all(adapter->fw_done);
1508         mwifiex_dbg(adapter, INFO, "%s, error\n", __func__);
1509
1510         return -1;
1511 }
1512 EXPORT_SYMBOL_GPL(mwifiex_reinit_sw);
1513
1514 static irqreturn_t mwifiex_irq_wakeup_handler(int irq, void *priv)
1515 {
1516         struct mwifiex_adapter *adapter = priv;
1517
1518         dev_dbg(adapter->dev, "%s: wake by wifi", __func__);
1519         adapter->wake_by_wifi = true;
1520         disable_irq_nosync(irq);
1521
1522         /* Notify PM core we are wakeup source */
1523         pm_wakeup_event(adapter->dev, 0);
1524         pm_system_wakeup();
1525
1526         return IRQ_HANDLED;
1527 }
1528
1529 static void mwifiex_probe_of(struct mwifiex_adapter *adapter)
1530 {
1531         int ret;
1532         struct device *dev = adapter->dev;
1533
1534         if (!dev->of_node)
1535                 goto err_exit;
1536
1537         adapter->dt_node = dev->of_node;
1538         adapter->irq_wakeup = irq_of_parse_and_map(adapter->dt_node, 0);
1539         if (!adapter->irq_wakeup) {
1540                 dev_dbg(dev, "fail to parse irq_wakeup from device tree\n");
1541                 goto err_exit;
1542         }
1543
1544         ret = devm_request_irq(dev, adapter->irq_wakeup,
1545                                mwifiex_irq_wakeup_handler, IRQF_TRIGGER_LOW,
1546                                "wifi_wake", adapter);
1547         if (ret) {
1548                 dev_err(dev, "Failed to request irq_wakeup %d (%d)\n",
1549                         adapter->irq_wakeup, ret);
1550                 goto err_exit;
1551         }
1552
1553         disable_irq(adapter->irq_wakeup);
1554         if (device_init_wakeup(dev, true)) {
1555                 dev_err(dev, "fail to init wakeup for mwifiex\n");
1556                 goto err_exit;
1557         }
1558         return;
1559
1560 err_exit:
1561         adapter->irq_wakeup = -1;
1562 }
1563
1564 /*
1565  * This function adds the card.
1566  *
1567  * This function follows the following major steps to set up the device -
1568  *      - Initialize software. This includes probing the card, registering
1569  *        the interface operations table, and allocating/initializing the
1570  *        adapter structure
1571  *      - Set up the netlink socket
1572  *      - Create and start the main work queue
1573  *      - Register the device
1574  *      - Initialize firmware and hardware
1575  *      - Add logical interfaces
1576  */
1577 int
1578 mwifiex_add_card(void *card, struct completion *fw_done,
1579                  struct mwifiex_if_ops *if_ops, u8 iface_type,
1580                  struct device *dev)
1581 {
1582         struct mwifiex_adapter *adapter;
1583
1584         if (mwifiex_register(card, dev, if_ops, (void **)&adapter)) {
1585                 pr_err("%s: software init failed\n", __func__);
1586                 goto err_init_sw;
1587         }
1588
1589         mwifiex_probe_of(adapter);
1590
1591         adapter->iface_type = iface_type;
1592         adapter->fw_done = fw_done;
1593
1594         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
1595         adapter->surprise_removed = false;
1596         init_waitqueue_head(&adapter->init_wait_q);
1597         adapter->is_suspended = false;
1598         adapter->hs_activated = false;
1599         init_waitqueue_head(&adapter->hs_activate_wait_q);
1600         init_waitqueue_head(&adapter->cmd_wait_q.wait);
1601         adapter->cmd_wait_q.status = 0;
1602         adapter->scan_wait_q_woken = false;
1603
1604         if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB) {
1605                 adapter->rx_work_enabled = true;
1606                 pr_notice("rx work enabled, cpus %d\n", num_possible_cpus());
1607         }
1608
1609         adapter->workqueue =
1610                 alloc_workqueue("MWIFIEX_WORK_QUEUE",
1611                                 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
1612         if (!adapter->workqueue)
1613                 goto err_kmalloc;
1614
1615         INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
1616
1617         if (adapter->rx_work_enabled) {
1618                 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
1619                                                         WQ_HIGHPRI |
1620                                                         WQ_MEM_RECLAIM |
1621                                                         WQ_UNBOUND, 1);
1622                 if (!adapter->rx_workqueue)
1623                         goto err_kmalloc;
1624
1625                 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
1626         }
1627
1628         /* Register the device. Fill up the private data structure with relevant
1629            information from the card. */
1630         if (adapter->if_ops.register_dev(adapter)) {
1631                 pr_err("%s: failed to register mwifiex device\n", __func__);
1632                 goto err_registerdev;
1633         }
1634
1635         if (mwifiex_init_hw_fw(adapter, true)) {
1636                 pr_err("%s: firmware init failed\n", __func__);
1637                 goto err_init_fw;
1638         }
1639
1640         return 0;
1641
1642 err_init_fw:
1643         pr_debug("info: %s: unregister device\n", __func__);
1644         if (adapter->if_ops.unregister_dev)
1645                 adapter->if_ops.unregister_dev(adapter);
1646 err_registerdev:
1647         adapter->surprise_removed = true;
1648         mwifiex_terminate_workqueue(adapter);
1649         if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
1650                 pr_debug("info: %s: shutdown mwifiex\n", __func__);
1651                 mwifiex_shutdown_drv(adapter);
1652         }
1653 err_kmalloc:
1654         mwifiex_free_adapter(adapter);
1655
1656 err_init_sw:
1657
1658         return -1;
1659 }
1660 EXPORT_SYMBOL_GPL(mwifiex_add_card);
1661
1662 /*
1663  * This function removes the card.
1664  *
1665  * This function follows the following major steps to remove the device -
1666  *      - Stop data traffic
1667  *      - Shutdown firmware
1668  *      - Remove the logical interfaces
1669  *      - Terminate the work queue
1670  *      - Unregister the device
1671  *      - Free the adapter structure
1672  */
1673 int mwifiex_remove_card(struct mwifiex_adapter *adapter)
1674 {
1675         struct mwifiex_private *priv = NULL;
1676         int i;
1677
1678         if (!adapter)
1679                 goto exit_remove;
1680
1681         /* We can no longer handle interrupts once we start doing the teardown
1682          * below. */
1683         if (adapter->if_ops.disable_int)
1684                 adapter->if_ops.disable_int(adapter);
1685
1686         adapter->surprise_removed = true;
1687
1688         mwifiex_terminate_workqueue(adapter);
1689
1690         /* Stop data */
1691         for (i = 0; i < adapter->priv_num; i++) {
1692                 priv = adapter->priv[i];
1693                 if (priv && priv->netdev) {
1694                         mwifiex_stop_net_dev_queue(priv->netdev, adapter);
1695                         if (netif_carrier_ok(priv->netdev))
1696                                 netif_carrier_off(priv->netdev);
1697                 }
1698         }
1699
1700         mwifiex_dbg(adapter, CMD,
1701                     "cmd: calling mwifiex_shutdown_drv...\n");
1702
1703         mwifiex_shutdown_drv(adapter);
1704         mwifiex_dbg(adapter, CMD,
1705                     "cmd: mwifiex_shutdown_drv done\n");
1706         if (atomic_read(&adapter->rx_pending) ||
1707             atomic_read(&adapter->tx_pending) ||
1708             atomic_read(&adapter->cmd_pending)) {
1709                 mwifiex_dbg(adapter, ERROR,
1710                             "rx_pending=%d, tx_pending=%d,\t"
1711                             "cmd_pending=%d\n",
1712                             atomic_read(&adapter->rx_pending),
1713                             atomic_read(&adapter->tx_pending),
1714                             atomic_read(&adapter->cmd_pending));
1715         }
1716
1717         for (i = 0; i < adapter->priv_num; i++) {
1718                 priv = adapter->priv[i];
1719
1720                 if (!priv)
1721                         continue;
1722
1723                 rtnl_lock();
1724                 if (priv->netdev &&
1725                     priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
1726                         mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
1727                 rtnl_unlock();
1728         }
1729
1730         wiphy_unregister(adapter->wiphy);
1731         wiphy_free(adapter->wiphy);
1732
1733         if (adapter->irq_wakeup >= 0)
1734                 device_init_wakeup(adapter->dev, false);
1735
1736         /* Unregister device */
1737         mwifiex_dbg(adapter, INFO,
1738                     "info: unregister device\n");
1739         if (adapter->if_ops.unregister_dev)
1740                 adapter->if_ops.unregister_dev(adapter);
1741         /* Free adapter structure */
1742         mwifiex_dbg(adapter, INFO,
1743                     "info: free adapter\n");
1744         mwifiex_free_adapter(adapter);
1745
1746 exit_remove:
1747         return 0;
1748 }
1749 EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1750
1751 void _mwifiex_dbg(const struct mwifiex_adapter *adapter, int mask,
1752                   const char *fmt, ...)
1753 {
1754         struct va_format vaf;
1755         va_list args;
1756
1757         if (!(adapter->debug_mask & mask))
1758                 return;
1759
1760         va_start(args, fmt);
1761
1762         vaf.fmt = fmt;
1763         vaf.va = &args;
1764
1765         if (adapter->dev)
1766                 dev_info(adapter->dev, "%pV", &vaf);
1767         else
1768                 pr_info("%pV", &vaf);
1769
1770         va_end(args);
1771 }
1772 EXPORT_SYMBOL_GPL(_mwifiex_dbg);
1773
1774 /*
1775  * This function initializes the module.
1776  *
1777  * The debug FS is also initialized if configured.
1778  */
1779 static int
1780 mwifiex_init_module(void)
1781 {
1782 #ifdef CONFIG_DEBUG_FS
1783         mwifiex_debugfs_init();
1784 #endif
1785         return 0;
1786 }
1787
1788 /*
1789  * This function cleans up the module.
1790  *
1791  * The debug FS is removed if available.
1792  */
1793 static void
1794 mwifiex_cleanup_module(void)
1795 {
1796 #ifdef CONFIG_DEBUG_FS
1797         mwifiex_debugfs_remove();
1798 #endif
1799 }
1800
1801 module_init(mwifiex_init_module);
1802 module_exit(mwifiex_cleanup_module);
1803
1804 MODULE_AUTHOR("Marvell International Ltd.");
1805 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1806 MODULE_VERSION(VERSION);
1807 MODULE_LICENSE("GPL v2");