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