drivers/net/wireless/marvell/mwifiex/init.c

   1 /*
   2  * Marvell Wireless LAN device driver: HW/FW Initialization
   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 "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27
  28 /*
  29  * This function adds a BSS priority table to the table list.
  30  *
  31  * The function allocates a new BSS priority table node and adds it to
  32  * the end of BSS priority table list, kept in driver memory.
  33  */
  34 static int mwifiex_add_bss_prio_tbl(struct mwifiex_private *priv)
  35 {
  36         struct mwifiex_adapter *adapter = priv->adapter;
  37         struct mwifiex_bss_prio_node *bss_prio;
  38         struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
  39         unsigned long flags;
  40
  41         bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
  42         if (!bss_prio)
  43                 return -ENOMEM;
  44
  45         bss_prio->priv = priv;
  46         INIT_LIST_HEAD(&bss_prio->list);
  47
  48         spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags);
  49         list_add_tail(&bss_prio->list, &tbl[priv->bss_priority].bss_prio_head);
  50         spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags);
  51
  52         return 0;
  53 }
  54
  55 static void wakeup_timer_fn(struct timer_list *t)
  56 {
  57         struct mwifiex_adapter *adapter = from_timer(adapter, t, wakeup_timer);
  58
  59         mwifiex_dbg(adapter, ERROR, "Firmware wakeup failed\n");
  60         adapter->hw_status = MWIFIEX_HW_STATUS_RESET;
  61         mwifiex_cancel_all_pending_cmd(adapter);
  62
  63         if (adapter->if_ops.card_reset && !adapter->hs_activated)
  64                 adapter->if_ops.card_reset(adapter);
  65 }
  66
  67 static void fw_dump_timer_fn(struct timer_list *t)
  68 {
  69         struct mwifiex_adapter *adapter = from_timer(adapter, t, devdump_timer);
  70
  71         mwifiex_upload_device_dump(adapter);
  72 }
  73
  74 /*
  75  * This function initializes the private structure and sets default
  76  * values to the members.
  77  *
  78  * Additionally, it also initializes all the locks and sets up all the
  79  * lists.
  80  */
  81 int mwifiex_init_priv(struct mwifiex_private *priv)
  82 {
  83         u32 i;
  84
  85         priv->media_connected = false;
  86         eth_broadcast_addr(priv->curr_addr);
  87         priv->port_open = false;
  88         priv->usb_port = MWIFIEX_USB_EP_DATA;
  89         priv->pkt_tx_ctrl = 0;
  90         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
  91         priv->data_rate = 0;    /* Initially indicate the rate as auto */
  92         priv->is_data_rate_auto = true;
  93         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
  94         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
  95
  96         priv->sec_info.wep_enabled = 0;
  97         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
  98         priv->sec_info.encryption_mode = 0;
  99         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
 100                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
 101         priv->wep_key_curr_index = 0;
 102         priv->curr_pkt_filter = HostCmd_ACT_MAC_DYNAMIC_BW_ENABLE |
 103                                 HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
 104                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
 105
 106         priv->beacon_period = 100; /* beacon interval */
 107         priv->attempted_bss_desc = NULL;
 108         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 109         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 110
 111         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 112         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 113         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 114         priv->assoc_rsp_size = 0;
 115         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 116         priv->atim_window = 0;
 117         priv->adhoc_state = ADHOC_IDLE;
 118         priv->tx_power_level = 0;
 119         priv->max_tx_power_level = 0;
 120         priv->min_tx_power_level = 0;
 121         priv->tx_ant = 0;
 122         priv->rx_ant = 0;
 123         priv->tx_rate = 0;
 124         priv->rxpd_htinfo = 0;
 125         priv->rxpd_rate = 0;
 126         priv->rate_bitmap = 0;
 127         priv->data_rssi_last = 0;
 128         priv->data_rssi_avg = 0;
 129         priv->data_nf_avg = 0;
 130         priv->data_nf_last = 0;
 131         priv->bcn_rssi_last = 0;
 132         priv->bcn_rssi_avg = 0;
 133         priv->bcn_nf_avg = 0;
 134         priv->bcn_nf_last = 0;
 135         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 136         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 137         priv->wpa_ie_len = 0;
 138         priv->wpa_is_gtk_set = false;
 139
 140         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 141         priv->assoc_tlv_buf_len = 0;
 142         memset(&priv->wps, 0, sizeof(priv->wps));
 143         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 144         priv->gen_ie_buf_len = 0;
 145         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 146
 147         priv->wmm_required = true;
 148         priv->wmm_enabled = false;
 149         priv->wmm_qosinfo = 0;
 150         priv->curr_bcn_buf = NULL;
 151         priv->curr_bcn_size = 0;
 152         priv->wps_ie = NULL;
 153         priv->wps_ie_len = 0;
 154         priv->ap_11n_enabled = 0;
 155         memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg));
 156
 157         priv->scan_block = false;
 158
 159         priv->csa_chan = 0;
 160         priv->csa_expire_time = 0;
 161         priv->del_list_idx = 0;
 162         priv->hs2_enabled = false;
 163         priv->check_tdls_tx = false;
 164         memcpy(priv->tos_to_tid_inv, tos_to_tid_inv, MAX_NUM_TID);
 165
 166         mwifiex_init_11h_params(priv);
 167
 168         return mwifiex_add_bss_prio_tbl(priv);
 169 }
 170
 171 /*
 172  * This function allocates buffers for members of the adapter
 173  * structure.
 174  *
 175  * The memory allocated includes scan table, command buffers, and
 176  * sleep confirm command buffer. In addition, the queues are
 177  * also initialized.
 178  */
 179 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 180 {
 181         int ret;
 182
 183         /* Allocate command buffer */
 184         ret = mwifiex_alloc_cmd_buffer(adapter);
 185         if (ret) {
 186                 mwifiex_dbg(adapter, ERROR,
 187                             "%s: failed to alloc cmd buffer\n",
 188                             __func__);
 189                 return -1;
 190         }
 191
 192         adapter->sleep_cfm =
 193                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 194                               + INTF_HEADER_LEN);
 195
 196         if (!adapter->sleep_cfm) {
 197                 mwifiex_dbg(adapter, ERROR,
 198                             "%s: failed to alloc sleep cfm\t"
 199                             " cmd buffer\n", __func__);
 200                 return -1;
 201         }
 202         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 203
 204         return 0;
 205 }
 206
 207 /*
 208  * This function initializes the adapter structure and sets default
 209  * values to the members of adapter.
 210  *
 211  * This also initializes the WMM related parameters in the driver private
 212  * structures.
 213  */
 214 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 215 {
 216         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 217
 218         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 219
 220         adapter->cmd_sent = false;
 221
 222         if (adapter->iface_type == MWIFIEX_SDIO)
 223                 adapter->data_sent = true;
 224         else
 225                 adapter->data_sent = false;
 226
 227         if (adapter->iface_type == MWIFIEX_USB)
 228                 adapter->intf_hdr_len = 0;
 229         else
 230                 adapter->intf_hdr_len = INTF_HEADER_LEN;
 231
 232         adapter->cmd_resp_received = false;
 233         adapter->event_received = false;
 234         adapter->data_received = false;
 235
 236         clear_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags);
 237
 238         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 239
 240         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 241         adapter->ps_state = PS_STATE_AWAKE;
 242         adapter->need_to_wakeup = false;
 243
 244         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 245         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 246         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 247         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 248         adapter->scan_chan_gap_time = MWIFIEX_DEF_SCAN_CHAN_GAP_TIME;
 249
 250         adapter->scan_probes = 1;
 251
 252         adapter->multiple_dtim = 1;
 253
 254         adapter->local_listen_interval = 0;     /* default value in firmware
 255                                                    will be used */
 256
 257         adapter->is_deep_sleep = false;
 258
 259         adapter->delay_null_pkt = false;
 260         adapter->delay_to_ps = 1000;
 261         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 262
 263         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 264                                            default */
 265         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 266                                            default */
 267         adapter->pm_wakeup_card_req = false;
 268
 269         adapter->pm_wakeup_fw_try = false;
 270
 271         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 272
 273         clear_bit(MWIFIEX_IS_HS_CONFIGURED, &adapter->work_flags);
 274         adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF);
 275         adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF;
 276         adapter->hs_cfg.gap = HS_CFG_GAP_DEF;
 277         adapter->hs_activated = false;
 278
 279         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 280         adapter->hw_dot_11n_dev_cap = 0;
 281         adapter->hw_dev_mcs_support = 0;
 282         adapter->sec_chan_offset = 0;
 283         adapter->adhoc_11n_enabled = false;
 284
 285         mwifiex_wmm_init(adapter);
 286         atomic_set(&adapter->tx_hw_pending, 0);
 287
 288         sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 289                                         adapter->sleep_cfm->data;
 290         memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 291         sleep_cfm_buf->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 292         sleep_cfm_buf->size = cpu_to_le16(adapter->sleep_cfm->len);
 293         sleep_cfm_buf->result = 0;
 294         sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 295         sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 296
 297         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 298         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 299         adapter->tx_lock_flag = false;
 300         adapter->null_pkt_interval = 0;
 301         adapter->fw_bands = 0;
 302         adapter->config_bands = 0;
 303         adapter->adhoc_start_band = 0;
 304         adapter->scan_channels = NULL;
 305         adapter->fw_release_number = 0;
 306         adapter->fw_cap_info = 0;
 307         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 308         adapter->event_cause = 0;
 309         adapter->region_code = 0;
 310         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 311         adapter->adhoc_awake_period = 0;
 312         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 313         adapter->arp_filter_size = 0;
 314         adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
 315         adapter->mfg_mode = mfg_mode;
 316         adapter->key_api_major_ver = 0;
 317         adapter->key_api_minor_ver = 0;
 318         eth_broadcast_addr(adapter->perm_addr);
 319         adapter->iface_limit.sta_intf = MWIFIEX_MAX_STA_NUM;
 320         adapter->iface_limit.uap_intf = MWIFIEX_MAX_UAP_NUM;
 321         adapter->iface_limit.p2p_intf = MWIFIEX_MAX_P2P_NUM;
 322         adapter->active_scan_triggered = false;
 323         timer_setup(&adapter->wakeup_timer, wakeup_timer_fn, 0);
 324         adapter->devdump_len = 0;
 325         timer_setup(&adapter->devdump_timer, fw_dump_timer_fn, 0);
 326 }
 327
 328 /*
 329  * This function sets trans_start per tx_queue
 330  */
 331 void mwifiex_set_trans_start(struct net_device *dev)
 332 {
 333         int i;
 334
 335         for (i = 0; i < dev->num_tx_queues; i++)
 336                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 337
 338         netif_trans_update(dev);
 339 }
 340
 341 /*
 342  * This function wakes up all queues in net_device
 343  */
 344 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 345                                         struct mwifiex_adapter *adapter)
 346 {
 347         unsigned long dev_queue_flags;
 348
 349         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 350         netif_tx_wake_all_queues(netdev);
 351         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 352 }
 353
 354 /*
 355  * This function stops all queues in net_device
 356  */
 357 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 358                                         struct mwifiex_adapter *adapter)
 359 {
 360         unsigned long dev_queue_flags;
 361
 362         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 363         netif_tx_stop_all_queues(netdev);
 364         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 365 }
 366
 367 /*
 368  * This function invalidates the list heads.
 369  */
 370 static void mwifiex_invalidate_lists(struct mwifiex_adapter *adapter)
 371 {
 372         struct mwifiex_private *priv;
 373         s32 i, j;
 374
 375         list_del(&adapter->cmd_free_q);
 376         list_del(&adapter->cmd_pending_q);
 377         list_del(&adapter->scan_pending_q);
 378
 379         for (i = 0; i < adapter->priv_num; i++)
 380                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 381
 382         for (i = 0; i < adapter->priv_num; i++) {
 383                 if (adapter->priv[i]) {
 384                         priv = adapter->priv[i];
 385                         for (j = 0; j < MAX_NUM_TID; ++j)
 386                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 387                         list_del(&priv->tx_ba_stream_tbl_ptr);
 388                         list_del(&priv->rx_reorder_tbl_ptr);
 389                         list_del(&priv->sta_list);
 390                         list_del(&priv->auto_tdls_list);
 391                 }
 392         }
 393 }
 394
 395 /*
 396  * This function performs cleanup for adapter structure.
 397  *
 398  * The cleanup is done recursively, by canceling all pending
 399  * commands, freeing the member buffers previously allocated
 400  * (command buffers, scan table buffer, sleep confirm command
 401  * buffer), stopping the timers and calling the cleanup routines
 402  * for every interface.
 403  */
 404 static void
 405 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
 406 {
 407         del_timer(&adapter->wakeup_timer);
 408         del_timer_sync(&adapter->devdump_timer);
 409         mwifiex_cancel_all_pending_cmd(adapter);
 410         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 411         wake_up_interruptible(&adapter->hs_activate_wait_q);
 412 }
 413
 414 void mwifiex_free_cmd_buffers(struct mwifiex_adapter *adapter)
 415 {
 416         mwifiex_invalidate_lists(adapter);
 417
 418         /* Free command buffer */
 419         mwifiex_dbg(adapter, INFO, "info: free cmd buffer\n");
 420         mwifiex_free_cmd_buffer(adapter);
 421
 422         if (adapter->sleep_cfm)
 423                 dev_kfree_skb_any(adapter->sleep_cfm);
 424 }
 425
 426 /*
 427  *  This function intializes the lock variables and
 428  *  the list heads.
 429  */
 430 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 431 {
 432         struct mwifiex_private *priv;
 433         s32 i, j;
 434
 435         spin_lock_init(&adapter->int_lock);
 436         spin_lock_init(&adapter->main_proc_lock);
 437         spin_lock_init(&adapter->mwifiex_cmd_lock);
 438         spin_lock_init(&adapter->queue_lock);
 439         for (i = 0; i < adapter->priv_num; i++) {
 440                 if (adapter->priv[i]) {
 441                         priv = adapter->priv[i];
 442                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 443                         spin_lock_init(&priv->curr_bcn_buf_lock);
 444                         spin_lock_init(&priv->sta_list_spinlock);
 445                         spin_lock_init(&priv->auto_tdls_lock);
 446                 }
 447         }
 448
 449         /* Initialize cmd_free_q */
 450         INIT_LIST_HEAD(&adapter->cmd_free_q);
 451         /* Initialize cmd_pending_q */
 452         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 453         /* Initialize scan_pending_q */
 454         INIT_LIST_HEAD(&adapter->scan_pending_q);
 455
 456         spin_lock_init(&adapter->cmd_free_q_lock);
 457         spin_lock_init(&adapter->cmd_pending_q_lock);
 458         spin_lock_init(&adapter->scan_pending_q_lock);
 459         spin_lock_init(&adapter->rx_proc_lock);
 460
 461         skb_queue_head_init(&adapter->rx_data_q);
 462         skb_queue_head_init(&adapter->tx_data_q);
 463
 464         for (i = 0; i < adapter->priv_num; ++i) {
 465                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 466                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 467         }
 468
 469         for (i = 0; i < adapter->priv_num; i++) {
 470                 if (!adapter->priv[i])
 471                         continue;
 472                 priv = adapter->priv[i];
 473                 for (j = 0; j < MAX_NUM_TID; ++j)
 474                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 475                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 476                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 477                 INIT_LIST_HEAD(&priv->sta_list);
 478                 INIT_LIST_HEAD(&priv->auto_tdls_list);
 479                 skb_queue_head_init(&priv->tdls_txq);
 480                 skb_queue_head_init(&priv->bypass_txq);
 481
 482                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 483                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 484
 485                 spin_lock_init(&priv->ack_status_lock);
 486                 idr_init(&priv->ack_status_frames);
 487         }
 488
 489         return 0;
 490 }
 491
 492 /*
 493  * This function initializes the firmware.
 494  *
 495  * The following operations are performed sequentially -
 496  *      - Allocate adapter structure
 497  *      - Initialize the adapter structure
 498  *      - Initialize the private structure
 499  *      - Add BSS priority tables to the adapter structure
 500  *      - For each interface, send the init commands to firmware
 501  *      - Send the first command in command pending queue, if available
 502  */
 503 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 504 {
 505         int ret;
 506         struct mwifiex_private *priv;
 507         u8 i, first_sta = true;
 508         int is_cmd_pend_q_empty;
 509         unsigned long flags;
 510
 511         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 512
 513         /* Allocate memory for member of adapter structure */
 514         ret = mwifiex_allocate_adapter(adapter);
 515         if (ret)
 516                 return -1;
 517
 518         /* Initialize adapter structure */
 519         mwifiex_init_adapter(adapter);
 520
 521         for (i = 0; i < adapter->priv_num; i++) {
 522                 if (adapter->priv[i]) {
 523                         priv = adapter->priv[i];
 524
 525                         /* Initialize private structure */
 526                         ret = mwifiex_init_priv(priv);
 527                         if (ret)
 528                                 return -1;
 529                 }
 530         }
 531         if (adapter->mfg_mode) {
 532                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 533                 ret = -EINPROGRESS;
 534         } else {
 535                 for (i = 0; i < adapter->priv_num; i++) {
 536                         if (adapter->priv[i]) {
 537                                 ret = mwifiex_sta_init_cmd(adapter->priv[i],
 538                                                            first_sta, true);
 539                                 if (ret == -1)
 540                                         return -1;
 541
 542                                 first_sta = false;
 543                         }
 544
 545
 546
 547                 }
 548         }
 549
 550         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 551         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 552         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 553         if (!is_cmd_pend_q_empty) {
 554                 /* Send the first command in queue and return */
 555                 if (mwifiex_main_process(adapter) != -1)
 556                         ret = -EINPROGRESS;
 557         } else {
 558                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 559         }
 560
 561         return ret;
 562 }
 563
 564 /*
 565  * This function deletes the BSS priority tables.
 566  *
 567  * The function traverses through all the allocated BSS priority nodes
 568  * in every BSS priority table and frees them.
 569  */
 570 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 571 {
 572         int i;
 573         struct mwifiex_adapter *adapter = priv->adapter;
 574         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
 575         struct list_head *head;
 576         spinlock_t *lock; /* bss priority lock */
 577         unsigned long flags;
 578
 579         for (i = 0; i < adapter->priv_num; ++i) {
 580                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 581                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 582                 mwifiex_dbg(adapter, INFO,
 583                             "info: delete BSS priority table,\t"
 584                             "bss_type = %d, bss_num = %d, i = %d,\t"
 585                             "head = %p\n",
 586                             priv->bss_type, priv->bss_num, i, head);
 587
 588                 {
 589                         spin_lock_irqsave(lock, flags);
 590                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 591                                                  list) {
 592                                 if (bssprio_node->priv == priv) {
 593                                         mwifiex_dbg(adapter, INFO,
 594                                                     "info: Delete\t"
 595                                                     "node %p, next = %p\n",
 596                                                     bssprio_node, tmp_node);
 597                                         list_del(&bssprio_node->list);
 598                                         kfree(bssprio_node);
 599                                 }
 600                         }
 601                         spin_unlock_irqrestore(lock, flags);
 602                 }
 603         }
 604 }
 605
 606 /*
 607  * This function frees the private structure, including cleans
 608  * up the TX and RX queues and frees the BSS priority tables.
 609  */
 610 void mwifiex_free_priv(struct mwifiex_private *priv)
 611 {
 612         mwifiex_clean_txrx(priv);
 613         mwifiex_delete_bss_prio_tbl(priv);
 614         mwifiex_free_curr_bcn(priv);
 615 }
 616
 617 /*
 618  * This function is used to shutdown the driver.
 619  *
 620  * The following operations are performed sequentially -
 621  *      - Check if already shut down
 622  *      - Make sure the main process has stopped
 623  *      - Clean up the Tx and Rx queues
 624  *      - Delete BSS priority tables
 625  *      - Free the adapter
 626  *      - Notify completion
 627  */
 628 void
 629 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 630 {
 631         struct mwifiex_private *priv;
 632         s32 i;
 633         unsigned long flags;
 634         struct sk_buff *skb;
 635
 636         /* mwifiex already shutdown */
 637         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 638                 return;
 639
 640         /* cancel current command */
 641         if (adapter->curr_cmd) {
 642                 mwifiex_dbg(adapter, WARN,
 643                             "curr_cmd is still in processing\n");
 644                 del_timer_sync(&adapter->cmd_timer);
 645                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 646                 adapter->curr_cmd = NULL;
 647         }
 648
 649         /* shut down mwifiex */
 650         mwifiex_dbg(adapter, MSG,
 651                     "info: shutdown mwifiex...\n");
 652
 653         /* Clean up Tx/Rx queues and delete BSS priority table */
 654         for (i = 0; i < adapter->priv_num; i++) {
 655                 if (adapter->priv[i]) {
 656                         priv = adapter->priv[i];
 657
 658                         mwifiex_clean_auto_tdls(priv);
 659                         mwifiex_abort_cac(priv);
 660                         mwifiex_free_priv(priv);
 661                 }
 662         }
 663
 664         atomic_set(&adapter->tx_queued, 0);
 665         while ((skb = skb_dequeue(&adapter->tx_data_q)))
 666                 mwifiex_write_data_complete(adapter, skb, 0, 0);
 667
 668         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 669
 670         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 671                 struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 672
 673                 atomic_dec(&adapter->rx_pending);
 674                 priv = adapter->priv[rx_info->bss_num];
 675                 if (priv)
 676                         priv->stats.rx_dropped++;
 677
 678                 dev_kfree_skb_any(skb);
 679         }
 680
 681         spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 682
 683         mwifiex_adapter_cleanup(adapter);
 684
 685         adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY;
 686 }
 687
 688 /*
 689  * This function downloads the firmware to the card.
 690  *
 691  * The actual download is preceded by two sanity checks -
 692  *      - Check if firmware is already running
 693  *      - Check if the interface is the winner to download the firmware
 694  *
 695  * ...and followed by another -
 696  *      - Check if the firmware is downloaded successfully
 697  *
 698  * After download is successfully completed, the host interrupts are enabled.
 699  */
 700 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 701                     struct mwifiex_fw_image *pmfw)
 702 {
 703         int ret;
 704         u32 poll_num = 1;
 705
 706         if (adapter->if_ops.check_fw_status) {
 707                 /* check if firmware is already running */
 708                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 709                 if (!ret) {
 710                         mwifiex_dbg(adapter, MSG,
 711                                     "WLAN FW already running! Skip FW dnld\n");
 712                         return 0;
 713                 }
 714         }
 715
 716         /* check if we are the winner for downloading FW */
 717         if (adapter->if_ops.check_winner_status) {
 718                 adapter->winner = 0;
 719                 ret = adapter->if_ops.check_winner_status(adapter);
 720
 721                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 722                 if (ret) {
 723                         mwifiex_dbg(adapter, MSG,
 724                                     "WLAN read winner status failed!\n");
 725                         return ret;
 726                 }
 727
 728                 if (!adapter->winner) {
 729                         mwifiex_dbg(adapter, MSG,
 730                                     "WLAN is not the winner! Skip FW dnld\n");
 731                         goto poll_fw;
 732                 }
 733         }
 734
 735         if (pmfw) {
 736                 /* Download firmware with helper */
 737                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 738                 if (ret) {
 739                         mwifiex_dbg(adapter, ERROR,
 740                                     "prog_fw failed ret=%#x\n", ret);
 741                         return ret;
 742                 }
 743         }
 744
 745 poll_fw:
 746         /* Check if the firmware is downloaded successfully or not */
 747         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 748         if (ret)
 749                 mwifiex_dbg(adapter, ERROR,
 750                             "FW failed to be active in time\n");
 751
 752         return ret;
 753 }
 754 EXPORT_SYMBOL_GPL(mwifiex_dnld_fw);