drivers/net/wireless/mwifiex/main.c

   1 /*
   2  * Marvell Wireless LAN device driver: major functions
   3  *
   4  * Copyright (C) 2011-2014, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "main.h"
  21 #include "wmm.h"
  22 #include "cfg80211.h"
  23 #include "11n.h"
  24
  25 #define VERSION "1.0"
  26
  27 static unsigned int debug_mask = MWIFIEX_DEFAULT_DEBUG_MASK;
  28 module_param(debug_mask, uint, 0);
  29 MODULE_PARM_DESC(debug_mask, "bitmap for debug flags");
  30
  31 const char driver_version[] = "mwifiex " VERSION " (%s) ";
  32 static char *cal_data_cfg;
  33 module_param(cal_data_cfg, charp, 0);
  34
  35 static unsigned short driver_mode;
  36 module_param(driver_mode, ushort, 0);
  37 MODULE_PARM_DESC(driver_mode,
  38                  "station=0x1(default), ap-sta=0x3, station-p2p=0x5, ap-sta-p2p=0x7");
  39
  40 /*
  41  * This function registers the device and performs all the necessary
  42  * initializations.
  43  *
  44  * The following initialization operations are performed -
  45  *      - Allocate adapter structure
  46  *      - Save interface specific operations table in adapter
  47  *      - Call interface specific initialization routine
  48  *      - Allocate private structures
  49  *      - Set default adapter structure parameters
  50  *      - Initialize locks
  51  *
  52  * In case of any errors during inittialization, this function also ensures
  53  * proper cleanup before exiting.
  54  */
  55 static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops,
  56                             void **padapter)
  57 {
  58         struct mwifiex_adapter *adapter;
  59         int i;
  60
  61         adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
  62         if (!adapter)
  63                 return -ENOMEM;
  64
  65         *padapter = adapter;
  66         adapter->card = card;
  67
  68         /* Save interface specific operations in adapter */
  69         memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
  70         adapter->debug_mask = debug_mask;
  71
  72         /* card specific initialization has been deferred until now .. */
  73         if (adapter->if_ops.init_if)
  74                 if (adapter->if_ops.init_if(adapter))
  75                         goto error;
  76
  77         adapter->priv_num = 0;
  78
  79         for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
  80                 /* Allocate memory for private structure */
  81                 adapter->priv[i] =
  82                         kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
  83                 if (!adapter->priv[i])
  84                         goto error;
  85
  86                 adapter->priv[i]->adapter = adapter;
  87                 adapter->priv_num++;
  88         }
  89         mwifiex_init_lock_list(adapter);
  90
  91         setup_timer(&adapter->cmd_timer, mwifiex_cmd_timeout_func,
  92                     (unsigned long)adapter);
  93
  94         return 0;
  95
  96 error:
  97         mwifiex_dbg(adapter, ERROR,
  98                     "info: leave mwifiex_register with error\n");
  99
 100         for (i = 0; i < adapter->priv_num; i++)
 101                 kfree(adapter->priv[i]);
 102
 103         kfree(adapter);
 104
 105         return -1;
 106 }
 107
 108 /*
 109  * This function unregisters the device and performs all the necessary
 110  * cleanups.
 111  *
 112  * The following cleanup operations are performed -
 113  *      - Free the timers
 114  *      - Free beacon buffers
 115  *      - Free private structures
 116  *      - Free adapter structure
 117  */
 118 static int mwifiex_unregister(struct mwifiex_adapter *adapter)
 119 {
 120         s32 i;
 121
 122         if (adapter->if_ops.cleanup_if)
 123                 adapter->if_ops.cleanup_if(adapter);
 124
 125         del_timer_sync(&adapter->cmd_timer);
 126
 127         /* Free private structures */
 128         for (i = 0; i < adapter->priv_num; i++) {
 129                 if (adapter->priv[i]) {
 130                         mwifiex_free_curr_bcn(adapter->priv[i]);
 131                         kfree(adapter->priv[i]);
 132                 }
 133         }
 134
 135         vfree(adapter->chan_stats);
 136         kfree(adapter);
 137         return 0;
 138 }
 139
 140 void mwifiex_queue_main_work(struct mwifiex_adapter *adapter)
 141 {
 142         unsigned long flags;
 143
 144         spin_lock_irqsave(&adapter->main_proc_lock, flags);
 145         if (adapter->mwifiex_processing) {
 146                 adapter->more_task_flag = true;
 147                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 148         } else {
 149                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 150                 queue_work(adapter->workqueue, &adapter->main_work);
 151         }
 152 }
 153 EXPORT_SYMBOL_GPL(mwifiex_queue_main_work);
 154
 155 static void mwifiex_queue_rx_work(struct mwifiex_adapter *adapter)
 156 {
 157         unsigned long flags;
 158
 159         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 160         if (adapter->rx_processing) {
 161                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 162         } else {
 163                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 164                 queue_work(adapter->rx_workqueue, &adapter->rx_work);
 165         }
 166 }
 167
 168 static int mwifiex_process_rx(struct mwifiex_adapter *adapter)
 169 {
 170         unsigned long flags;
 171         struct sk_buff *skb;
 172         struct mwifiex_rxinfo *rx_info;
 173
 174         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 175         if (adapter->rx_processing || adapter->rx_locked) {
 176                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 177                 goto exit_rx_proc;
 178         } else {
 179                 adapter->rx_processing = true;
 180                 spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 181         }
 182
 183         /* Check for Rx data */
 184         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 185                 atomic_dec(&adapter->rx_pending);
 186                 if ((adapter->delay_main_work ||
 187                      adapter->iface_type == MWIFIEX_USB) &&
 188                     (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) {
 189                         if (adapter->if_ops.submit_rem_rx_urbs)
 190                                 adapter->if_ops.submit_rem_rx_urbs(adapter);
 191                         adapter->delay_main_work = false;
 192                         mwifiex_queue_main_work(adapter);
 193                 }
 194                 rx_info = MWIFIEX_SKB_RXCB(skb);
 195                 if (rx_info->buf_type == MWIFIEX_TYPE_AGGR_DATA) {
 196                         if (adapter->if_ops.deaggr_pkt)
 197                                 adapter->if_ops.deaggr_pkt(adapter, skb);
 198                         dev_kfree_skb_any(skb);
 199                 } else {
 200                         mwifiex_handle_rx_packet(adapter, skb);
 201                 }
 202         }
 203         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 204         adapter->rx_processing = false;
 205         spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 206
 207 exit_rx_proc:
 208         return 0;
 209 }
 210
 211 /*
 212  * The main process.
 213  *
 214  * This function is the main procedure of the driver and handles various driver
 215  * operations. It runs in a loop and provides the core functionalities.
 216  *
 217  * The main responsibilities of this function are -
 218  *      - Ensure concurrency control
 219  *      - Handle pending interrupts and call interrupt handlers
 220  *      - Wake up the card if required
 221  *      - Handle command responses and call response handlers
 222  *      - Handle events and call event handlers
 223  *      - Execute pending commands
 224  *      - Transmit pending data packets
 225  */
 226 int mwifiex_main_process(struct mwifiex_adapter *adapter)
 227 {
 228         int ret = 0;
 229         unsigned long flags;
 230
 231         spin_lock_irqsave(&adapter->main_proc_lock, flags);
 232
 233         /* Check if already processing */
 234         if (adapter->mwifiex_processing || adapter->main_locked) {
 235                 adapter->more_task_flag = true;
 236                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 237                 goto exit_main_proc;
 238         } else {
 239                 adapter->mwifiex_processing = true;
 240                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 241         }
 242 process_start:
 243         do {
 244                 if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
 245                     (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
 246                         break;
 247
 248                 /* For non-USB interfaces, If we process interrupts first, it
 249                  * would increase RX pending even further. Avoid this by
 250                  * checking if rx_pending has crossed high threshold and
 251                  * schedule rx work queue and then process interrupts.
 252                  * For USB interface, there are no interrupts. We already have
 253                  * HIGH_RX_PENDING check in usb.c
 254                  */
 255                 if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING &&
 256                     adapter->iface_type != MWIFIEX_USB) {
 257                         adapter->delay_main_work = true;
 258                         mwifiex_queue_rx_work(adapter);
 259                         break;
 260                 }
 261
 262                 /* Handle pending interrupt if any */
 263                 if (adapter->int_status) {
 264                         if (adapter->hs_activated)
 265                                 mwifiex_process_hs_config(adapter);
 266                         if (adapter->if_ops.process_int_status)
 267                                 adapter->if_ops.process_int_status(adapter);
 268                 }
 269
 270                 if (adapter->rx_work_enabled && adapter->data_received)
 271                         mwifiex_queue_rx_work(adapter);
 272
 273                 /* Need to wake up the card ? */
 274                 if ((adapter->ps_state == PS_STATE_SLEEP) &&
 275                     (adapter->pm_wakeup_card_req &&
 276                      !adapter->pm_wakeup_fw_try) &&
 277                     (is_command_pending(adapter) ||
 278                      !skb_queue_empty(&adapter->tx_data_q) ||
 279                      !mwifiex_bypass_txlist_empty(adapter) ||
 280                      !mwifiex_wmm_lists_empty(adapter))) {
 281                         adapter->pm_wakeup_fw_try = true;
 282                         mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3));
 283                         adapter->if_ops.wakeup(adapter);
 284                         continue;
 285                 }
 286
 287                 if (IS_CARD_RX_RCVD(adapter)) {
 288                         adapter->data_received = false;
 289                         adapter->pm_wakeup_fw_try = false;
 290                         del_timer(&adapter->wakeup_timer);
 291                         if (adapter->ps_state == PS_STATE_SLEEP)
 292                                 adapter->ps_state = PS_STATE_AWAKE;
 293                 } else {
 294                         /* We have tried to wakeup the card already */
 295                         if (adapter->pm_wakeup_fw_try)
 296                                 break;
 297                         if (adapter->ps_state != PS_STATE_AWAKE)
 298                                 break;
 299                         if (adapter->tx_lock_flag) {
 300                                 if (adapter->iface_type == MWIFIEX_USB) {
 301                                         if (!adapter->usb_mc_setup)
 302                                                 break;
 303                                 } else
 304                                         break;
 305                         }
 306
 307                         if ((!adapter->scan_chan_gap_enabled &&
 308                              adapter->scan_processing) || adapter->data_sent ||
 309                              mwifiex_is_tdls_chan_switching
 310                              (mwifiex_get_priv(adapter,
 311                                                MWIFIEX_BSS_ROLE_STA)) ||
 312                             (mwifiex_wmm_lists_empty(adapter) &&
 313                              mwifiex_bypass_txlist_empty(adapter) &&
 314                              skb_queue_empty(&adapter->tx_data_q))) {
 315                                 if (adapter->cmd_sent || adapter->curr_cmd ||
 316                                         !mwifiex_is_send_cmd_allowed
 317                                                 (mwifiex_get_priv(adapter,
 318                                                 MWIFIEX_BSS_ROLE_STA)) ||
 319                                     (!is_command_pending(adapter)))
 320                                         break;
 321                         }
 322                 }
 323
 324                 /* Check for event */
 325                 if (adapter->event_received) {
 326                         adapter->event_received = false;
 327                         mwifiex_process_event(adapter);
 328                 }
 329
 330                 /* Check for Cmd Resp */
 331                 if (adapter->cmd_resp_received) {
 332                         adapter->cmd_resp_received = false;
 333                         mwifiex_process_cmdresp(adapter);
 334
 335                         /* call mwifiex back when init_fw is done */
 336                         if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
 337                                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 338                                 mwifiex_init_fw_complete(adapter);
 339                         }
 340                 }
 341
 342                 /* Check if we need to confirm Sleep Request
 343                    received previously */
 344                 if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
 345                         if (!adapter->cmd_sent && !adapter->curr_cmd)
 346                                 mwifiex_check_ps_cond(adapter);
 347                 }
 348
 349                 /* * The ps_state may have been changed during processing of
 350                  * Sleep Request event.
 351                  */
 352                 if ((adapter->ps_state == PS_STATE_SLEEP) ||
 353                     (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
 354                     (adapter->ps_state == PS_STATE_SLEEP_CFM)) {
 355                         continue;
 356                 }
 357
 358                 if (adapter->tx_lock_flag) {
 359                         if (adapter->iface_type == MWIFIEX_USB) {
 360                                 if (!adapter->usb_mc_setup)
 361                                         continue;
 362                         } else
 363                                 continue;
 364                 }
 365
 366                 if (!adapter->cmd_sent && !adapter->curr_cmd &&
 367                     mwifiex_is_send_cmd_allowed
 368                     (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
 369                         if (mwifiex_exec_next_cmd(adapter) == -1) {
 370                                 ret = -1;
 371                                 break;
 372                         }
 373                 }
 374
 375                 /** If USB Multi channel setup ongoing,
 376                  *  wait for ready to tx data.
 377                  */
 378                 if (adapter->iface_type == MWIFIEX_USB &&
 379                     adapter->usb_mc_setup)
 380                         continue;
 381
 382                 if ((adapter->scan_chan_gap_enabled ||
 383                      !adapter->scan_processing) &&
 384                     !adapter->data_sent &&
 385                     !skb_queue_empty(&adapter->tx_data_q)) {
 386                         mwifiex_process_tx_queue(adapter);
 387                         if (adapter->hs_activated) {
 388                                 adapter->is_hs_configured = false;
 389                                 mwifiex_hs_activated_event
 390                                         (mwifiex_get_priv
 391                                         (adapter, MWIFIEX_BSS_ROLE_ANY),
 392                                         false);
 393                         }
 394                 }
 395
 396                 if ((adapter->scan_chan_gap_enabled ||
 397                      !adapter->scan_processing) &&
 398                     !adapter->data_sent &&
 399                     !mwifiex_bypass_txlist_empty(adapter) &&
 400                     !mwifiex_is_tdls_chan_switching
 401                         (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
 402                         mwifiex_process_bypass_tx(adapter);
 403                         if (adapter->hs_activated) {
 404                                 adapter->is_hs_configured = false;
 405                                 mwifiex_hs_activated_event
 406                                         (mwifiex_get_priv
 407                                          (adapter, MWIFIEX_BSS_ROLE_ANY),
 408                                          false);
 409                         }
 410                 }
 411
 412                 if ((adapter->scan_chan_gap_enabled ||
 413                      !adapter->scan_processing) &&
 414                     !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter) &&
 415                     !mwifiex_is_tdls_chan_switching
 416                         (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
 417                         mwifiex_wmm_process_tx(adapter);
 418                         if (adapter->hs_activated) {
 419                                 adapter->is_hs_configured = false;
 420                                 mwifiex_hs_activated_event
 421                                         (mwifiex_get_priv
 422                                          (adapter, MWIFIEX_BSS_ROLE_ANY),
 423                                          false);
 424                         }
 425                 }
 426
 427                 if (adapter->delay_null_pkt && !adapter->cmd_sent &&
 428                     !adapter->curr_cmd && !is_command_pending(adapter) &&
 429                     (mwifiex_wmm_lists_empty(adapter) &&
 430                      mwifiex_bypass_txlist_empty(adapter) &&
 431                      skb_queue_empty(&adapter->tx_data_q))) {
 432                         if (!mwifiex_send_null_packet
 433                             (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
 434                              MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 435                              MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
 436                                 adapter->delay_null_pkt = false;
 437                                 adapter->ps_state = PS_STATE_SLEEP;
 438                         }
 439                         break;
 440                 }
 441         } while (true);
 442
 443         spin_lock_irqsave(&adapter->main_proc_lock, flags);
 444         if (adapter->more_task_flag) {
 445                 adapter->more_task_flag = false;
 446                 spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 447                 goto process_start;
 448         }
 449         adapter->mwifiex_processing = false;
 450         spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
 451
 452 exit_main_proc:
 453         if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
 454                 mwifiex_shutdown_drv(adapter);
 455         return ret;
 456 }
 457 EXPORT_SYMBOL_GPL(mwifiex_main_process);
 458
 459 /*
 460  * This function frees the adapter structure.
 461  *
 462  * Additionally, this closes the netlink socket, frees the timers
 463  * and private structures.
 464  */
 465 static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
 466 {
 467         if (!adapter) {
 468                 pr_err("%s: adapter is NULL\n", __func__);
 469                 return;
 470         }
 471
 472         mwifiex_unregister(adapter);
 473         pr_debug("info: %s: free adapter\n", __func__);
 474 }
 475
 476 /*
 477  * This function cancels all works in the queue and destroys
 478  * the main workqueue.
 479  */
 480 static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
 481 {
 482         flush_workqueue(adapter->workqueue);
 483         destroy_workqueue(adapter->workqueue);
 484         adapter->workqueue = NULL;
 485
 486         if (adapter->rx_workqueue) {
 487                 flush_workqueue(adapter->rx_workqueue);
 488                 destroy_workqueue(adapter->rx_workqueue);
 489                 adapter->rx_workqueue = NULL;
 490         }
 491 }
 492
 493 /*
 494  * This function gets firmware and initializes it.
 495  *
 496  * The main initialization steps followed are -
 497  *      - Download the correct firmware to card
 498  *      - Issue the init commands to firmware
 499  */
 500 static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
 501 {
 502         int ret;
 503         char fmt[64];
 504         struct mwifiex_private *priv;
 505         struct mwifiex_adapter *adapter = context;
 506         struct mwifiex_fw_image fw;
 507         struct semaphore *sem = adapter->card_sem;
 508         bool init_failed = false;
 509         struct wireless_dev *wdev;
 510
 511         if (!firmware) {
 512                 mwifiex_dbg(adapter, ERROR,
 513                             "Failed to get firmware %s\n", adapter->fw_name);
 514                 goto err_dnld_fw;
 515         }
 516
 517         memset(&fw, 0, sizeof(struct mwifiex_fw_image));
 518         adapter->firmware = firmware;
 519         fw.fw_buf = (u8 *) adapter->firmware->data;
 520         fw.fw_len = adapter->firmware->size;
 521
 522         if (adapter->if_ops.dnld_fw)
 523                 ret = adapter->if_ops.dnld_fw(adapter, &fw);
 524         else
 525                 ret = mwifiex_dnld_fw(adapter, &fw);
 526         if (ret == -1)
 527                 goto err_dnld_fw;
 528
 529         mwifiex_dbg(adapter, MSG, "WLAN FW is active\n");
 530
 531         if (cal_data_cfg) {
 532                 if ((request_firmware(&adapter->cal_data, cal_data_cfg,
 533                                       adapter->dev)) < 0)
 534                         mwifiex_dbg(adapter, ERROR,
 535                                     "Cal data request_firmware() failed\n");
 536         }
 537
 538         /* enable host interrupt after fw dnld is successful */
 539         if (adapter->if_ops.enable_int) {
 540                 if (adapter->if_ops.enable_int(adapter))
 541                         goto err_dnld_fw;
 542         }
 543
 544         adapter->init_wait_q_woken = false;
 545         ret = mwifiex_init_fw(adapter);
 546         if (ret == -1) {
 547                 goto err_init_fw;
 548         } else if (!ret) {
 549                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 550                 goto done;
 551         }
 552         /* Wait for mwifiex_init to complete */
 553         wait_event_interruptible(adapter->init_wait_q,
 554                                  adapter->init_wait_q_woken);
 555         if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
 556                 goto err_init_fw;
 557
 558         priv = adapter->priv[MWIFIEX_BSS_ROLE_STA];
 559         if (mwifiex_register_cfg80211(adapter)) {
 560                 mwifiex_dbg(adapter, ERROR,
 561                             "cannot register with cfg80211\n");
 562                 goto err_init_fw;
 563         }
 564
 565         if (mwifiex_init_channel_scan_gap(adapter)) {
 566                 mwifiex_dbg(adapter, ERROR,
 567                             "could not init channel stats table\n");
 568                 goto err_init_fw;
 569         }
 570
 571         if (driver_mode) {
 572                 driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK;
 573                 driver_mode |= MWIFIEX_DRIVER_MODE_STA;
 574         }
 575
 576         rtnl_lock();
 577         /* Create station interface by default */
 578         wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NET_NAME_ENUM,
 579                                         NL80211_IFTYPE_STATION, NULL, NULL);
 580         if (IS_ERR(wdev)) {
 581                 mwifiex_dbg(adapter, ERROR,
 582                             "cannot create default STA interface\n");
 583                 rtnl_unlock();
 584                 goto err_add_intf;
 585         }
 586
 587         if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) {
 588                 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d", NET_NAME_ENUM,
 589                                                 NL80211_IFTYPE_AP, NULL, NULL);
 590                 if (IS_ERR(wdev)) {
 591                         mwifiex_dbg(adapter, ERROR,
 592                                     "cannot create AP interface\n");
 593                         rtnl_unlock();
 594                         goto err_add_intf;
 595                 }
 596         }
 597
 598         if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) {
 599                 wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d", NET_NAME_ENUM,
 600                                                 NL80211_IFTYPE_P2P_CLIENT, NULL,
 601                                                 NULL);
 602                 if (IS_ERR(wdev)) {
 603                         mwifiex_dbg(adapter, ERROR,
 604                                     "cannot create p2p client interface\n");
 605                         rtnl_unlock();
 606                         goto err_add_intf;
 607                 }
 608         }
 609         rtnl_unlock();
 610
 611         mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
 612         mwifiex_dbg(adapter, MSG, "driver_version = %s\n", fmt);
 613         goto done;
 614
 615 err_add_intf:
 616         wiphy_unregister(adapter->wiphy);
 617         wiphy_free(adapter->wiphy);
 618 err_init_fw:
 619         if (adapter->if_ops.disable_int)
 620                 adapter->if_ops.disable_int(adapter);
 621 err_dnld_fw:
 622         mwifiex_dbg(adapter, ERROR,
 623                     "info: %s: unregister device\n", __func__);
 624         if (adapter->if_ops.unregister_dev)
 625                 adapter->if_ops.unregister_dev(adapter);
 626
 627         if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
 628                 pr_debug("info: %s: shutdown mwifiex\n", __func__);
 629                 adapter->init_wait_q_woken = false;
 630
 631                 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
 632                         wait_event_interruptible(adapter->init_wait_q,
 633                                                  adapter->init_wait_q_woken);
 634         }
 635         adapter->surprise_removed = true;
 636         mwifiex_terminate_workqueue(adapter);
 637         init_failed = true;
 638 done:
 639         if (adapter->cal_data) {
 640                 release_firmware(adapter->cal_data);
 641                 adapter->cal_data = NULL;
 642         }
 643         if (adapter->firmware) {
 644                 release_firmware(adapter->firmware);
 645                 adapter->firmware = NULL;
 646         }
 647         if (init_failed)
 648                 mwifiex_free_adapter(adapter);
 649         up(sem);
 650         return;
 651 }
 652
 653 /*
 654  * This function initializes the hardware and gets firmware.
 655  */
 656 static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter)
 657 {
 658         int ret;
 659
 660         ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
 661                                       adapter->dev, GFP_KERNEL, adapter,
 662                                       mwifiex_fw_dpc);
 663         if (ret < 0)
 664                 mwifiex_dbg(adapter, ERROR,
 665                             "request_firmware_nowait error %d\n", ret);
 666         return ret;
 667 }
 668
 669 /*
 670  * CFG802.11 network device handler for open.
 671  *
 672  * Starts the data queue.
 673  */
 674 static int
 675 mwifiex_open(struct net_device *dev)
 676 {
 677         netif_carrier_off(dev);
 678
 679         return 0;
 680 }
 681
 682 /*
 683  * CFG802.11 network device handler for close.
 684  */
 685 static int
 686 mwifiex_close(struct net_device *dev)
 687 {
 688         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 689
 690         if (priv->scan_request) {
 691                 mwifiex_dbg(priv->adapter, INFO,
 692                             "aborting scan on ndo_stop\n");
 693                 cfg80211_scan_done(priv->scan_request, 1);
 694                 priv->scan_request = NULL;
 695                 priv->scan_aborting = true;
 696         }
 697
 698         return 0;
 699 }
 700
 701 static bool
 702 mwifiex_bypass_tx_queue(struct mwifiex_private *priv,
 703                         struct sk_buff *skb)
 704 {
 705         struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
 706
 707         if (ntohs(eth_hdr->h_proto) == ETH_P_PAE ||
 708             mwifiex_is_skb_mgmt_frame(skb) ||
 709             (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
 710              ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
 711              (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) {
 712                 mwifiex_dbg(priv->adapter, DATA,
 713                             "bypass txqueue; eth type %#x, mgmt %d\n",
 714                              ntohs(eth_hdr->h_proto),
 715                              mwifiex_is_skb_mgmt_frame(skb));
 716                 return true;
 717         }
 718
 719         return false;
 720 }
 721 /*
 722  * Add buffer into wmm tx queue and queue work to transmit it.
 723  */
 724 int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
 725 {
 726         struct netdev_queue *txq;
 727         int index = mwifiex_1d_to_wmm_queue[skb->priority];
 728
 729         if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
 730                 txq = netdev_get_tx_queue(priv->netdev, index);
 731                 if (!netif_tx_queue_stopped(txq)) {
 732                         netif_tx_stop_queue(txq);
 733                         mwifiex_dbg(priv->adapter, DATA,
 734                                     "stop queue: %d\n", index);
 735                 }
 736         }
 737
 738         if (mwifiex_bypass_tx_queue(priv, skb)) {
 739                 atomic_inc(&priv->adapter->tx_pending);
 740                 atomic_inc(&priv->adapter->bypass_tx_pending);
 741                 mwifiex_wmm_add_buf_bypass_txqueue(priv, skb);
 742          } else {
 743                 atomic_inc(&priv->adapter->tx_pending);
 744                 mwifiex_wmm_add_buf_txqueue(priv, skb);
 745          }
 746
 747         mwifiex_queue_main_work(priv->adapter);
 748
 749         return 0;
 750 }
 751
 752 struct sk_buff *
 753 mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv,
 754                                 struct sk_buff *skb, u8 flag, u64 *cookie)
 755 {
 756         struct sk_buff *orig_skb = skb;
 757         struct mwifiex_txinfo *tx_info, *orig_tx_info;
 758
 759         skb = skb_clone(skb, GFP_ATOMIC);
 760         if (skb) {
 761                 unsigned long flags;
 762                 int id;
 763
 764                 spin_lock_irqsave(&priv->ack_status_lock, flags);
 765                 id = idr_alloc(&priv->ack_status_frames, orig_skb,
 766                                1, 0xff, GFP_ATOMIC);
 767                 spin_unlock_irqrestore(&priv->ack_status_lock, flags);
 768
 769                 if (id >= 0) {
 770                         tx_info = MWIFIEX_SKB_TXCB(skb);
 771                         tx_info->ack_frame_id = id;
 772                         tx_info->flags |= flag;
 773                         orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb);
 774                         orig_tx_info->ack_frame_id = id;
 775                         orig_tx_info->flags |= flag;
 776
 777                         if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie)
 778                                 orig_tx_info->cookie = *cookie;
 779
 780                 } else if (skb_shared(skb)) {
 781                         kfree_skb(orig_skb);
 782                 } else {
 783                         kfree_skb(skb);
 784                         skb = orig_skb;
 785                 }
 786         } else {
 787                 /* couldn't clone -- lose tx status ... */
 788                 skb = orig_skb;
 789         }
 790
 791         return skb;
 792 }
 793
 794 /*
 795  * CFG802.11 network device handler for data transmission.
 796  */
 797 static int
 798 mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 799 {
 800         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 801         struct sk_buff *new_skb;
 802         struct mwifiex_txinfo *tx_info;
 803         bool multicast;
 804
 805         mwifiex_dbg(priv->adapter, DATA,
 806                     "data: %lu BSS(%d-%d): Data <= kernel\n",
 807                     jiffies, priv->bss_type, priv->bss_num);
 808
 809         if (priv->adapter->surprise_removed) {
 810                 kfree_skb(skb);
 811                 priv->stats.tx_dropped++;
 812                 return 0;
 813         }
 814         if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
 815                 mwifiex_dbg(priv->adapter, ERROR,
 816                             "Tx: bad skb len %d\n", skb->len);
 817                 kfree_skb(skb);
 818                 priv->stats.tx_dropped++;
 819                 return 0;
 820         }
 821         if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
 822                 mwifiex_dbg(priv->adapter, DATA,
 823                             "data: Tx: insufficient skb headroom %d\n",
 824                             skb_headroom(skb));
 825                 /* Insufficient skb headroom - allocate a new skb */
 826                 new_skb =
 827                         skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
 828                 if (unlikely(!new_skb)) {
 829                         mwifiex_dbg(priv->adapter, ERROR,
 830                                     "Tx: cannot alloca new_skb\n");
 831                         kfree_skb(skb);
 832                         priv->stats.tx_dropped++;
 833                         return 0;
 834                 }
 835                 kfree_skb(skb);
 836                 skb = new_skb;
 837                 mwifiex_dbg(priv->adapter, INFO,
 838                             "info: new skb headroomd %d\n",
 839                             skb_headroom(skb));
 840         }
 841
 842         tx_info = MWIFIEX_SKB_TXCB(skb);
 843         memset(tx_info, 0, sizeof(*tx_info));
 844         tx_info->bss_num = priv->bss_num;
 845         tx_info->bss_type = priv->bss_type;
 846         tx_info->pkt_len = skb->len;
 847
 848         multicast = is_multicast_ether_addr(skb->data);
 849
 850         if (unlikely(!multicast && skb->sk &&
 851                      skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS &&
 852                      priv->adapter->fw_api_ver == MWIFIEX_FW_V15))
 853                 skb = mwifiex_clone_skb_for_tx_status(priv,
 854                                                       skb,
 855                                         MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL);
 856
 857         /* Record the current time the packet was queued; used to
 858          * determine the amount of time the packet was queued in
 859          * the driver before it was sent to the firmware.
 860          * The delay is then sent along with the packet to the
 861          * firmware for aggregate delay calculation for stats and
 862          * MSDU lifetime expiry.
 863          */
 864         __net_timestamp(skb);
 865
 866         if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
 867             priv->bss_type == MWIFIEX_BSS_TYPE_STA &&
 868             !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) {
 869                 if (priv->adapter->auto_tdls && priv->check_tdls_tx)
 870                         mwifiex_tdls_check_tx(priv, skb);
 871         }
 872
 873         mwifiex_queue_tx_pkt(priv, skb);
 874
 875         return 0;
 876 }
 877
 878 /*
 879  * CFG802.11 network device handler for setting MAC address.
 880  */
 881 static int
 882 mwifiex_set_mac_address(struct net_device *dev, void *addr)
 883 {
 884         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 885         struct sockaddr *hw_addr = addr;
 886         int ret;
 887
 888         memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
 889
 890         /* Send request to firmware */
 891         ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
 892                                HostCmd_ACT_GEN_SET, 0, NULL, true);
 893
 894         if (!ret)
 895                 memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
 896         else
 897                 mwifiex_dbg(priv->adapter, ERROR,
 898                             "set mac address failed: ret=%d\n", ret);
 899
 900         memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
 901
 902         return ret;
 903 }
 904
 905 /*
 906  * CFG802.11 network device handler for setting multicast list.
 907  */
 908 static void mwifiex_set_multicast_list(struct net_device *dev)
 909 {
 910         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 911         struct mwifiex_multicast_list mcast_list;
 912
 913         if (dev->flags & IFF_PROMISC) {
 914                 mcast_list.mode = MWIFIEX_PROMISC_MODE;
 915         } else if (dev->flags & IFF_ALLMULTI ||
 916                    netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
 917                 mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
 918         } else {
 919                 mcast_list.mode = MWIFIEX_MULTICAST_MODE;
 920                 mcast_list.num_multicast_addr =
 921                         mwifiex_copy_mcast_addr(&mcast_list, dev);
 922         }
 923         mwifiex_request_set_multicast_list(priv, &mcast_list);
 924 }
 925
 926 /*
 927  * CFG802.11 network device handler for transmission timeout.
 928  */
 929 static void
 930 mwifiex_tx_timeout(struct net_device *dev)
 931 {
 932         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 933
 934         priv->num_tx_timeout++;
 935         priv->tx_timeout_cnt++;
 936         mwifiex_dbg(priv->adapter, ERROR,
 937                     "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
 938                     jiffies, priv->tx_timeout_cnt, priv->bss_type,
 939                     priv->bss_num);
 940         mwifiex_set_trans_start(dev);
 941
 942         if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
 943             priv->adapter->if_ops.card_reset) {
 944                 mwifiex_dbg(priv->adapter, ERROR,
 945                             "tx_timeout_cnt exceeds threshold.\t"
 946                             "Triggering card reset!\n");
 947                 priv->adapter->if_ops.card_reset(priv->adapter);
 948         }
 949 }
 950
 951 void mwifiex_multi_chan_resync(struct mwifiex_adapter *adapter)
 952 {
 953         struct usb_card_rec *card = adapter->card;
 954         struct mwifiex_private *priv;
 955         u16 tx_buf_size;
 956         int i, ret;
 957
 958         card->mc_resync_flag = true;
 959         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 960                 if (atomic_read(&card->port[i].tx_data_urb_pending)) {
 961                         mwifiex_dbg(adapter, WARN, "pending data urb in sys\n");
 962                         return;
 963                 }
 964         }
 965
 966         card->mc_resync_flag = false;
 967         tx_buf_size = 0xffff;
 968         priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 969         ret = mwifiex_send_cmd(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF,
 970                                HostCmd_ACT_GEN_SET, 0, &tx_buf_size, false);
 971         if (ret)
 972                 mwifiex_dbg(adapter, ERROR,
 973                             "send reconfig tx buf size cmd err\n");
 974 }
 975 EXPORT_SYMBOL_GPL(mwifiex_multi_chan_resync);
 976
 977 void mwifiex_drv_info_dump(struct mwifiex_adapter *adapter)
 978 {
 979         void *p;
 980         char drv_version[64];
 981         struct usb_card_rec *cardp;
 982         struct sdio_mmc_card *sdio_card;
 983         struct mwifiex_private *priv;
 984         int i, idx;
 985         struct netdev_queue *txq;
 986         struct mwifiex_debug_info *debug_info;
 987
 988         if (adapter->drv_info_dump) {
 989                 vfree(adapter->drv_info_dump);
 990                 adapter->drv_info_dump = NULL;
 991                 adapter->drv_info_size = 0;
 992         }
 993
 994         mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump start===\n");
 995
 996         adapter->drv_info_dump = vzalloc(MWIFIEX_DRV_INFO_SIZE_MAX);
 997
 998         if (!adapter->drv_info_dump)
 999                 return;
1000
1001         p = (char *)(adapter->drv_info_dump);
1002         p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
1003
1004         mwifiex_drv_get_driver_version(adapter, drv_version,
1005                                        sizeof(drv_version) - 1);
1006         p += sprintf(p, "driver_version = %s\n", drv_version);
1007
1008         if (adapter->iface_type == MWIFIEX_USB) {
1009                 cardp = (struct usb_card_rec *)adapter->card;
1010                 p += sprintf(p, "tx_cmd_urb_pending = %d\n",
1011                              atomic_read(&cardp->tx_cmd_urb_pending));
1012                 p += sprintf(p, "tx_data_urb_pending_port_0 = %d\n",
1013                              atomic_read(&cardp->port[0].tx_data_urb_pending));
1014                 p += sprintf(p, "tx_data_urb_pending_port_1 = %d\n",
1015                              atomic_read(&cardp->port[1].tx_data_urb_pending));
1016                 p += sprintf(p, "rx_cmd_urb_pending = %d\n",
1017                              atomic_read(&cardp->rx_cmd_urb_pending));
1018                 p += sprintf(p, "rx_data_urb_pending = %d\n",
1019                              atomic_read(&cardp->rx_data_urb_pending));
1020         }
1021
1022         p += sprintf(p, "tx_pending = %d\n",
1023                      atomic_read(&adapter->tx_pending));
1024         p += sprintf(p, "rx_pending = %d\n",
1025                      atomic_read(&adapter->rx_pending));
1026
1027         if (adapter->iface_type == MWIFIEX_SDIO) {
1028                 sdio_card = (struct sdio_mmc_card *)adapter->card;
1029                 p += sprintf(p, "\nmp_rd_bitmap=0x%x curr_rd_port=0x%x\n",
1030                              sdio_card->mp_rd_bitmap, sdio_card->curr_rd_port);
1031                 p += sprintf(p, "mp_wr_bitmap=0x%x curr_wr_port=0x%x\n",
1032                              sdio_card->mp_wr_bitmap, sdio_card->curr_wr_port);
1033         }
1034
1035         for (i = 0; i < adapter->priv_num; i++) {
1036                 if (!adapter->priv[i] || !adapter->priv[i]->netdev)
1037                         continue;
1038                 priv = adapter->priv[i];
1039                 p += sprintf(p, "\n[interface  : \"%s\"]\n",
1040                              priv->netdev->name);
1041                 p += sprintf(p, "wmm_tx_pending[0] = %d\n",
1042                              atomic_read(&priv->wmm_tx_pending[0]));
1043                 p += sprintf(p, "wmm_tx_pending[1] = %d\n",
1044                              atomic_read(&priv->wmm_tx_pending[1]));
1045                 p += sprintf(p, "wmm_tx_pending[2] = %d\n",
1046                              atomic_read(&priv->wmm_tx_pending[2]));
1047                 p += sprintf(p, "wmm_tx_pending[3] = %d\n",
1048                              atomic_read(&priv->wmm_tx_pending[3]));
1049                 p += sprintf(p, "media_state=\"%s\"\n", !priv->media_connected ?
1050                              "Disconnected" : "Connected");
1051                 p += sprintf(p, "carrier %s\n", (netif_carrier_ok(priv->netdev)
1052                              ? "on" : "off"));
1053                 for (idx = 0; idx < priv->netdev->num_tx_queues; idx++) {
1054                         txq = netdev_get_tx_queue(priv->netdev, idx);
1055                         p += sprintf(p, "tx queue %d:%s  ", idx,
1056                                      netif_tx_queue_stopped(txq) ?
1057                                      "stopped" : "started");
1058                 }
1059                 p += sprintf(p, "\n%s: num_tx_timeout = %d\n",
1060                              priv->netdev->name, priv->num_tx_timeout);
1061         }
1062
1063         if (adapter->iface_type == MWIFIEX_SDIO) {
1064                 p += sprintf(p, "\n=== SDIO register dump===\n");
1065                 if (adapter->if_ops.reg_dump)
1066                         p += adapter->if_ops.reg_dump(adapter, p);
1067         }
1068
1069         p += sprintf(p, "\n=== more debug information\n");
1070         debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL);
1071         if (debug_info) {
1072                 for (i = 0; i < adapter->priv_num; i++) {
1073                         if (!adapter->priv[i] || !adapter->priv[i]->netdev)
1074                                 continue;
1075                         priv = adapter->priv[i];
1076                         mwifiex_get_debug_info(priv, debug_info);
1077                         p += mwifiex_debug_info_to_buffer(priv, p, debug_info);
1078                         break;
1079                 }
1080                 kfree(debug_info);
1081         }
1082
1083         adapter->drv_info_size = p - adapter->drv_info_dump;
1084         mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump end===\n");
1085 }
1086 EXPORT_SYMBOL_GPL(mwifiex_drv_info_dump);
1087
1088 void mwifiex_upload_device_dump(struct mwifiex_adapter *adapter)
1089 {
1090         u8 idx, *dump_data, *fw_dump_ptr;
1091         u32 dump_len;
1092
1093         dump_len = (strlen("========Start dump driverinfo========\n") +
1094                        adapter->drv_info_size +
1095                        strlen("\n========End dump========\n"));
1096
1097         for (idx = 0; idx < adapter->num_mem_types; idx++) {
1098                 struct memory_type_mapping *entry =
1099                                 &adapter->mem_type_mapping_tbl[idx];
1100
1101                 if (entry->mem_ptr) {
1102                         dump_len += (strlen("========Start dump ") +
1103                                         strlen(entry->mem_name) +
1104                                         strlen("========\n") +
1105                                         (entry->mem_size + 1) +
1106                                         strlen("\n========End dump========\n"));
1107                 }
1108         }
1109
1110         dump_data = vzalloc(dump_len + 1);
1111         if (!dump_data)
1112                 goto done;
1113
1114         fw_dump_ptr = dump_data;
1115
1116         /* Dump all the memory data into single file, a userspace script will
1117          * be used to split all the memory data to multiple files
1118          */
1119         mwifiex_dbg(adapter, MSG,
1120                     "== mwifiex dump information to /sys/class/devcoredump start");
1121
1122         strcpy(fw_dump_ptr, "========Start dump driverinfo========\n");
1123         fw_dump_ptr += strlen("========Start dump driverinfo========\n");
1124         memcpy(fw_dump_ptr, adapter->drv_info_dump, adapter->drv_info_size);
1125         fw_dump_ptr += adapter->drv_info_size;
1126         strcpy(fw_dump_ptr, "\n========End dump========\n");
1127         fw_dump_ptr += strlen("\n========End dump========\n");
1128
1129         for (idx = 0; idx < adapter->num_mem_types; idx++) {
1130                 struct memory_type_mapping *entry =
1131                                         &adapter->mem_type_mapping_tbl[idx];
1132
1133                 if (entry->mem_ptr) {
1134                         strcpy(fw_dump_ptr, "========Start dump ");
1135                         fw_dump_ptr += strlen("========Start dump ");
1136
1137                         strcpy(fw_dump_ptr, entry->mem_name);
1138                         fw_dump_ptr += strlen(entry->mem_name);
1139
1140                         strcpy(fw_dump_ptr, "========\n");
1141                         fw_dump_ptr += strlen("========\n");
1142
1143                         memcpy(fw_dump_ptr, entry->mem_ptr, entry->mem_size);
1144                         fw_dump_ptr += entry->mem_size;
1145
1146                         strcpy(fw_dump_ptr, "\n========End dump========\n");
1147                         fw_dump_ptr += strlen("\n========End dump========\n");
1148                 }
1149         }
1150
1151         /* device dump data will be free in device coredump release function
1152          * after 5 min
1153          */
1154         dev_coredumpv(adapter->dev, dump_data, dump_len, GFP_KERNEL);
1155         mwifiex_dbg(adapter, MSG,
1156                     "== mwifiex dump information to /sys/class/devcoredump end");
1157
1158 done:
1159         for (idx = 0; idx < adapter->num_mem_types; idx++) {
1160                 struct memory_type_mapping *entry =
1161                         &adapter->mem_type_mapping_tbl[idx];
1162
1163                 if (entry->mem_ptr) {
1164                         vfree(entry->mem_ptr);
1165                         entry->mem_ptr = NULL;
1166                 }
1167                 entry->mem_size = 0;
1168         }
1169
1170         if (adapter->drv_info_dump) {
1171                 vfree(adapter->drv_info_dump);
1172                 adapter->drv_info_dump = NULL;
1173                 adapter->drv_info_size = 0;
1174         }
1175 }
1176 EXPORT_SYMBOL_GPL(mwifiex_upload_device_dump);
1177
1178 /*
1179  * CFG802.11 network device handler for statistics retrieval.
1180  */
1181 static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
1182 {
1183         struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
1184
1185         return &priv->stats;
1186 }
1187
1188 static u16
1189 mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
1190                                 void *accel_priv, select_queue_fallback_t fallback)
1191 {
1192         skb->priority = cfg80211_classify8021d(skb, NULL);
1193         return mwifiex_1d_to_wmm_queue[skb->priority];
1194 }
1195
1196 /* Network device handlers */
1197 static const struct net_device_ops mwifiex_netdev_ops = {
1198         .ndo_open = mwifiex_open,
1199         .ndo_stop = mwifiex_close,
1200         .ndo_start_xmit = mwifiex_hard_start_xmit,
1201         .ndo_set_mac_address = mwifiex_set_mac_address,
1202         .ndo_validate_addr = eth_validate_addr,
1203         .ndo_tx_timeout = mwifiex_tx_timeout,
1204         .ndo_get_stats = mwifiex_get_stats,
1205         .ndo_set_rx_mode = mwifiex_set_multicast_list,
1206         .ndo_select_queue = mwifiex_netdev_select_wmm_queue,
1207 };
1208
1209 /*
1210  * This function initializes the private structure parameters.
1211  *
1212  * The following wait queues are initialized -
1213  *      - IOCTL wait queue
1214  *      - Command wait queue
1215  *      - Statistics wait queue
1216  *
1217  * ...and the following default parameters are set -
1218  *      - Current key index     : Set to 0
1219  *      - Rate index            : Set to auto
1220  *      - Media connected       : Set to disconnected
1221  *      - Adhoc link sensed     : Set to false
1222  *      - Nick name             : Set to null
1223  *      - Number of Tx timeout  : Set to 0
1224  *      - Device address        : Set to current address
1225  *      - Rx histogram statistc : Set to 0
1226  *
1227  * In addition, the CFG80211 work queue is also created.
1228  */
1229 void mwifiex_init_priv_params(struct mwifiex_private *priv,
1230                               struct net_device *dev)
1231 {
1232         dev->netdev_ops = &mwifiex_netdev_ops;
1233         dev->destructor = free_netdev;
1234         /* Initialize private structure */
1235         priv->current_key_index = 0;
1236         priv->media_connected = false;
1237         memset(priv->mgmt_ie, 0,
1238                sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
1239         priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
1240         priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
1241         priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
1242         priv->gen_idx = MWIFIEX_AUTO_IDX_MASK;
1243         priv->num_tx_timeout = 0;
1244         ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr);
1245         memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
1246
1247         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
1248             GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
1249                 priv->hist_data = kmalloc(sizeof(*priv->hist_data), GFP_KERNEL);
1250                 if (priv->hist_data)
1251                         mwifiex_hist_data_reset(priv);
1252         }
1253 }
1254
1255 /*
1256  * This function check if command is pending.
1257  */
1258 int is_command_pending(struct mwifiex_adapter *adapter)
1259 {
1260         unsigned long flags;
1261         int is_cmd_pend_q_empty;
1262
1263         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
1264         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
1265         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
1266
1267         return !is_cmd_pend_q_empty;
1268 }
1269
1270 /*
1271  * This is the RX work queue function.
1272  *
1273  * It handles the RX operations.
1274  */
1275 static void mwifiex_rx_work_queue(struct work_struct *work)
1276 {
1277         struct mwifiex_adapter *adapter =
1278                 container_of(work, struct mwifiex_adapter, rx_work);
1279
1280         if (adapter->surprise_removed)
1281                 return;
1282         mwifiex_process_rx(adapter);
1283 }
1284
1285 /*
1286  * This is the main work queue function.
1287  *
1288  * It handles the main process, which in turn handles the complete
1289  * driver operations.
1290  */
1291 static void mwifiex_main_work_queue(struct work_struct *work)
1292 {
1293         struct mwifiex_adapter *adapter =
1294                 container_of(work, struct mwifiex_adapter, main_work);
1295
1296         if (adapter->surprise_removed)
1297                 return;
1298         mwifiex_main_process(adapter);
1299 }
1300
1301 /*
1302  * This function adds the card.
1303  *
1304  * This function follows the following major steps to set up the device -
1305  *      - Initialize software. This includes probing the card, registering
1306  *        the interface operations table, and allocating/initializing the
1307  *        adapter structure
1308  *      - Set up the netlink socket
1309  *      - Create and start the main work queue
1310  *      - Register the device
1311  *      - Initialize firmware and hardware
1312  *      - Add logical interfaces
1313  */
1314 int
1315 mwifiex_add_card(void *card, struct semaphore *sem,
1316                  struct mwifiex_if_ops *if_ops, u8 iface_type)
1317 {
1318         struct mwifiex_adapter *adapter;
1319
1320         if (down_interruptible(sem))
1321                 goto exit_sem_err;
1322
1323         if (mwifiex_register(card, if_ops, (void **)&adapter)) {
1324                 pr_err("%s: software init failed\n", __func__);
1325                 goto err_init_sw;
1326         }
1327
1328         adapter->iface_type = iface_type;
1329         adapter->card_sem = sem;
1330
1331         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
1332         adapter->surprise_removed = false;
1333         init_waitqueue_head(&adapter->init_wait_q);
1334         adapter->is_suspended = false;
1335         adapter->hs_activated = false;
1336         init_waitqueue_head(&adapter->hs_activate_wait_q);
1337         init_waitqueue_head(&adapter->cmd_wait_q.wait);
1338         adapter->cmd_wait_q.status = 0;
1339         adapter->scan_wait_q_woken = false;
1340
1341         if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB) {
1342                 adapter->rx_work_enabled = true;
1343                 pr_notice("rx work enabled, cpus %d\n", num_possible_cpus());
1344         }
1345
1346         adapter->workqueue =
1347                 alloc_workqueue("MWIFIEX_WORK_QUEUE",
1348                                 WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
1349         if (!adapter->workqueue)
1350                 goto err_kmalloc;
1351
1352         INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
1353
1354         if (adapter->rx_work_enabled) {
1355                 adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
1356                                                         WQ_HIGHPRI |
1357                                                         WQ_MEM_RECLAIM |
1358                                                         WQ_UNBOUND, 1);
1359                 if (!adapter->rx_workqueue)
1360                         goto err_kmalloc;
1361
1362                 INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
1363         }
1364
1365         /* Register the device. Fill up the private data structure with relevant
1366            information from the card. */
1367         if (adapter->if_ops.register_dev(adapter)) {
1368                 pr_err("%s: failed to register mwifiex device\n", __func__);
1369                 goto err_registerdev;
1370         }
1371
1372         if (mwifiex_init_hw_fw(adapter)) {
1373                 pr_err("%s: firmware init failed\n", __func__);
1374                 goto err_init_fw;
1375         }
1376
1377         return 0;
1378
1379 err_init_fw:
1380         pr_debug("info: %s: unregister device\n", __func__);
1381         if (adapter->if_ops.unregister_dev)
1382                 adapter->if_ops.unregister_dev(adapter);
1383         if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
1384                 pr_debug("info: %s: shutdown mwifiex\n", __func__);
1385                 adapter->init_wait_q_woken = false;
1386
1387                 if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1388                         wait_event_interruptible(adapter->init_wait_q,
1389                                                  adapter->init_wait_q_woken);
1390         }
1391 err_registerdev:
1392         adapter->surprise_removed = true;
1393         mwifiex_terminate_workqueue(adapter);
1394 err_kmalloc:
1395         mwifiex_free_adapter(adapter);
1396
1397 err_init_sw:
1398         up(sem);
1399
1400 exit_sem_err:
1401         return -1;
1402 }
1403 EXPORT_SYMBOL_GPL(mwifiex_add_card);
1404
1405 /*
1406  * This function removes the card.
1407  *
1408  * This function follows the following major steps to remove the device -
1409  *      - Stop data traffic
1410  *      - Shutdown firmware
1411  *      - Remove the logical interfaces
1412  *      - Terminate the work queue
1413  *      - Unregister the device
1414  *      - Free the adapter structure
1415  */
1416 int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
1417 {
1418         struct mwifiex_private *priv = NULL;
1419         int i;
1420
1421         if (down_interruptible(sem))
1422                 goto exit_sem_err;
1423
1424         if (!adapter)
1425                 goto exit_remove;
1426
1427         /* We can no longer handle interrupts once we start doing the teardown
1428          * below. */
1429         if (adapter->if_ops.disable_int)
1430                 adapter->if_ops.disable_int(adapter);
1431
1432         adapter->surprise_removed = true;
1433
1434         mwifiex_terminate_workqueue(adapter);
1435
1436         /* Stop data */
1437         for (i = 0; i < adapter->priv_num; i++) {
1438                 priv = adapter->priv[i];
1439                 if (priv && priv->netdev) {
1440                         mwifiex_stop_net_dev_queue(priv->netdev, adapter);
1441                         if (netif_carrier_ok(priv->netdev))
1442                                 netif_carrier_off(priv->netdev);
1443                 }
1444         }
1445
1446         mwifiex_dbg(adapter, CMD,
1447                     "cmd: calling mwifiex_shutdown_drv...\n");
1448         adapter->init_wait_q_woken = false;
1449
1450         if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1451                 wait_event_interruptible(adapter->init_wait_q,
1452                                          adapter->init_wait_q_woken);
1453         mwifiex_dbg(adapter, CMD,
1454                     "cmd: mwifiex_shutdown_drv done\n");
1455         if (atomic_read(&adapter->rx_pending) ||
1456             atomic_read(&adapter->tx_pending) ||
1457             atomic_read(&adapter->cmd_pending)) {
1458                 mwifiex_dbg(adapter, ERROR,
1459                             "rx_pending=%d, tx_pending=%d,\t"
1460                             "cmd_pending=%d\n",
1461                             atomic_read(&adapter->rx_pending),
1462                             atomic_read(&adapter->tx_pending),
1463                             atomic_read(&adapter->cmd_pending));
1464         }
1465
1466         for (i = 0; i < adapter->priv_num; i++) {
1467                 priv = adapter->priv[i];
1468
1469                 if (!priv)
1470                         continue;
1471
1472                 rtnl_lock();
1473                 if (priv->netdev &&
1474                     priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
1475                         mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
1476                 rtnl_unlock();
1477         }
1478
1479         wiphy_unregister(adapter->wiphy);
1480         wiphy_free(adapter->wiphy);
1481
1482         /* Unregister device */
1483         mwifiex_dbg(adapter, INFO,
1484                     "info: unregister device\n");
1485         if (adapter->if_ops.unregister_dev)
1486                 adapter->if_ops.unregister_dev(adapter);
1487         /* Free adapter structure */
1488         mwifiex_dbg(adapter, INFO,
1489                     "info: free adapter\n");
1490         mwifiex_free_adapter(adapter);
1491
1492 exit_remove:
1493         up(sem);
1494 exit_sem_err:
1495         return 0;
1496 }
1497 EXPORT_SYMBOL_GPL(mwifiex_remove_card);
1498
1499 void _mwifiex_dbg(const struct mwifiex_adapter *adapter, int mask,
1500                   const char *fmt, ...)
1501 {
1502         struct va_format vaf;
1503         va_list args;
1504
1505         if (!adapter->dev || !(adapter->debug_mask & mask))
1506                 return;
1507
1508         va_start(args, fmt);
1509
1510         vaf.fmt = fmt;
1511         vaf.va = &args;
1512
1513         dev_info(adapter->dev, "%pV", &vaf);
1514
1515         va_end(args);
1516 }
1517 EXPORT_SYMBOL_GPL(_mwifiex_dbg);
1518
1519 /*
1520  * This function initializes the module.
1521  *
1522  * The debug FS is also initialized if configured.
1523  */
1524 static int
1525 mwifiex_init_module(void)
1526 {
1527 #ifdef CONFIG_DEBUG_FS
1528         mwifiex_debugfs_init();
1529 #endif
1530         return 0;
1531 }
1532
1533 /*
1534  * This function cleans up the module.
1535  *
1536  * The debug FS is removed if available.
1537  */
1538 static void
1539 mwifiex_cleanup_module(void)
1540 {
1541 #ifdef CONFIG_DEBUG_FS
1542         mwifiex_debugfs_remove();
1543 #endif
1544 }
1545
1546 module_init(mwifiex_init_module);
1547 module_exit(mwifiex_cleanup_module);
1548
1549 MODULE_AUTHOR("Marvell International Ltd.");
1550 MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
1551 MODULE_VERSION(VERSION);
1552 MODULE_LICENSE("GPL v2");