drivers/net/wireless/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(unsigned long data)
  56 {
  57         struct mwifiex_adapter *adapter = (struct mwifiex_adapter *)data;
  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)
  64                 adapter->if_ops.card_reset(adapter);
  65 }
  66
  67 /*
  68  * This function initializes the private structure and sets default
  69  * values to the members.
  70  *
  71  * Additionally, it also initializes all the locks and sets up all the
  72  * lists.
  73  */
  74 int mwifiex_init_priv(struct mwifiex_private *priv)
  75 {
  76         u32 i;
  77
  78         priv->media_connected = false;
  79         eth_broadcast_addr(priv->curr_addr);
  80         priv->port_open = false;
  81         priv->usb_port = MWIFIEX_USB_EP_DATA;
  82         priv->pkt_tx_ctrl = 0;
  83         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
  84         priv->data_rate = 0;    /* Initially indicate the rate as auto */
  85         priv->is_data_rate_auto = true;
  86         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
  87         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
  88
  89         priv->sec_info.wep_enabled = 0;
  90         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
  91         priv->sec_info.encryption_mode = 0;
  92         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
  93                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
  94         priv->wep_key_curr_index = 0;
  95         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
  96                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
  97
  98         priv->beacon_period = 100; /* beacon interval */ ;
  99         priv->attempted_bss_desc = NULL;
 100         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 101         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 102
 103         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 104         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 105         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 106         priv->assoc_rsp_size = 0;
 107         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 108         priv->atim_window = 0;
 109         priv->adhoc_state = ADHOC_IDLE;
 110         priv->tx_power_level = 0;
 111         priv->max_tx_power_level = 0;
 112         priv->min_tx_power_level = 0;
 113         priv->tx_rate = 0;
 114         priv->rxpd_htinfo = 0;
 115         priv->rxpd_rate = 0;
 116         priv->rate_bitmap = 0;
 117         priv->data_rssi_last = 0;
 118         priv->data_rssi_avg = 0;
 119         priv->data_nf_avg = 0;
 120         priv->data_nf_last = 0;
 121         priv->bcn_rssi_last = 0;
 122         priv->bcn_rssi_avg = 0;
 123         priv->bcn_nf_avg = 0;
 124         priv->bcn_nf_last = 0;
 125         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 126         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 127         priv->wpa_ie_len = 0;
 128         priv->wpa_is_gtk_set = false;
 129
 130         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 131         priv->assoc_tlv_buf_len = 0;
 132         memset(&priv->wps, 0, sizeof(priv->wps));
 133         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 134         priv->gen_ie_buf_len = 0;
 135         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 136
 137         priv->wmm_required = true;
 138         priv->wmm_enabled = false;
 139         priv->wmm_qosinfo = 0;
 140         priv->curr_bcn_buf = NULL;
 141         priv->curr_bcn_size = 0;
 142         priv->wps_ie = NULL;
 143         priv->wps_ie_len = 0;
 144         priv->ap_11n_enabled = 0;
 145         memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg));
 146
 147         priv->scan_block = false;
 148
 149         priv->csa_chan = 0;
 150         priv->csa_expire_time = 0;
 151         priv->del_list_idx = 0;
 152         priv->hs2_enabled = false;
 153         priv->check_tdls_tx = false;
 154         memcpy(priv->tos_to_tid_inv, tos_to_tid_inv, MAX_NUM_TID);
 155
 156         mwifiex_init_11h_params(priv);
 157
 158         return mwifiex_add_bss_prio_tbl(priv);
 159 }
 160
 161 /*
 162  * This function allocates buffers for members of the adapter
 163  * structure.
 164  *
 165  * The memory allocated includes scan table, command buffers, and
 166  * sleep confirm command buffer. In addition, the queues are
 167  * also initialized.
 168  */
 169 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 170 {
 171         int ret;
 172
 173         /* Allocate command buffer */
 174         ret = mwifiex_alloc_cmd_buffer(adapter);
 175         if (ret) {
 176                 mwifiex_dbg(adapter, ERROR,
 177                             "%s: failed to alloc cmd buffer\n",
 178                             __func__);
 179                 return -1;
 180         }
 181
 182         adapter->sleep_cfm =
 183                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 184                               + INTF_HEADER_LEN);
 185
 186         if (!adapter->sleep_cfm) {
 187                 mwifiex_dbg(adapter, ERROR,
 188                             "%s: failed to alloc sleep cfm\t"
 189                             " cmd buffer\n", __func__);
 190                 return -1;
 191         }
 192         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 193
 194         return 0;
 195 }
 196
 197 /*
 198  * This function initializes the adapter structure and sets default
 199  * values to the members of adapter.
 200  *
 201  * This also initializes the WMM related parameters in the driver private
 202  * structures.
 203  */
 204 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 205 {
 206         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 207
 208         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 209
 210         adapter->cmd_sent = false;
 211
 212         if (adapter->iface_type == MWIFIEX_SDIO)
 213                 adapter->data_sent = true;
 214         else
 215                 adapter->data_sent = false;
 216
 217         adapter->cmd_resp_received = false;
 218         adapter->event_received = false;
 219         adapter->data_received = false;
 220
 221         adapter->surprise_removed = false;
 222
 223         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 224
 225         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 226         adapter->ps_state = PS_STATE_AWAKE;
 227         adapter->need_to_wakeup = false;
 228
 229         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 230         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 231         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 232         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 233         adapter->scan_chan_gap_time = MWIFIEX_DEF_SCAN_CHAN_GAP_TIME;
 234
 235         adapter->scan_probes = 1;
 236
 237         adapter->multiple_dtim = 1;
 238
 239         adapter->local_listen_interval = 0;     /* default value in firmware
 240                                                    will be used */
 241
 242         adapter->is_deep_sleep = false;
 243
 244         adapter->delay_null_pkt = false;
 245         adapter->delay_to_ps = 1000;
 246         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 247
 248         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 249                                            default */
 250         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 251                                            default */
 252         adapter->pm_wakeup_card_req = false;
 253
 254         adapter->pm_wakeup_fw_try = false;
 255
 256         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 257
 258         adapter->is_hs_configured = false;
 259         adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF);
 260         adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF;
 261         adapter->hs_cfg.gap = HS_CFG_GAP_DEF;
 262         adapter->hs_activated = false;
 263
 264         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 265         adapter->hw_dot_11n_dev_cap = 0;
 266         adapter->hw_dev_mcs_support = 0;
 267         adapter->sec_chan_offset = 0;
 268         adapter->adhoc_11n_enabled = false;
 269
 270         mwifiex_wmm_init(adapter);
 271
 272         sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 273                                         adapter->sleep_cfm->data;
 274         memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 275         sleep_cfm_buf->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 276         sleep_cfm_buf->size = cpu_to_le16(adapter->sleep_cfm->len);
 277         sleep_cfm_buf->result = 0;
 278         sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 279         sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 280
 281         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 282         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 283         adapter->tx_lock_flag = false;
 284         adapter->null_pkt_interval = 0;
 285         adapter->fw_bands = 0;
 286         adapter->config_bands = 0;
 287         adapter->adhoc_start_band = 0;
 288         adapter->scan_channels = NULL;
 289         adapter->fw_release_number = 0;
 290         adapter->fw_cap_info = 0;
 291         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 292         adapter->event_cause = 0;
 293         adapter->region_code = 0;
 294         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 295         adapter->adhoc_awake_period = 0;
 296         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 297         adapter->arp_filter_size = 0;
 298         adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
 299         adapter->key_api_major_ver = 0;
 300         adapter->key_api_minor_ver = 0;
 301         eth_broadcast_addr(adapter->perm_addr);
 302         adapter->iface_limit.sta_intf = MWIFIEX_MAX_STA_NUM;
 303         adapter->iface_limit.uap_intf = MWIFIEX_MAX_UAP_NUM;
 304         adapter->iface_limit.p2p_intf = MWIFIEX_MAX_P2P_NUM;
 305         adapter->active_scan_triggered = false;
 306         setup_timer(&adapter->wakeup_timer, wakeup_timer_fn,
 307                     (unsigned long)adapter);
 308 }
 309
 310 /*
 311  * This function sets trans_start per tx_queue
 312  */
 313 void mwifiex_set_trans_start(struct net_device *dev)
 314 {
 315         int i;
 316
 317         for (i = 0; i < dev->num_tx_queues; i++)
 318                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 319
 320         dev->trans_start = jiffies;
 321 }
 322
 323 /*
 324  * This function wakes up all queues in net_device
 325  */
 326 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 327                                         struct mwifiex_adapter *adapter)
 328 {
 329         unsigned long dev_queue_flags;
 330         unsigned int i;
 331
 332         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 333
 334         for (i = 0; i < netdev->num_tx_queues; i++) {
 335                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 336
 337                 if (netif_tx_queue_stopped(txq))
 338                         netif_tx_wake_queue(txq);
 339         }
 340
 341         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 342 }
 343
 344 /*
 345  * This function stops all queues in net_device
 346  */
 347 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 348                                         struct mwifiex_adapter *adapter)
 349 {
 350         unsigned long dev_queue_flags;
 351         unsigned int i;
 352
 353         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 354
 355         for (i = 0; i < netdev->num_tx_queues; i++) {
 356                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 357
 358                 if (!netif_tx_queue_stopped(txq))
 359                         netif_tx_stop_queue(txq);
 360         }
 361
 362         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 363 }
 364
 365 /*
 366  *  This function releases the lock variables and frees the locks and
 367  *  associated locks.
 368  */
 369 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 370 {
 371         struct mwifiex_private *priv;
 372         s32 i, j;
 373
 374         /* Free lists */
 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         int idx;
 408
 409         if (!adapter) {
 410                 pr_err("%s: adapter is NULL\n", __func__);
 411                 return;
 412         }
 413
 414         del_timer(&adapter->wakeup_timer);
 415         mwifiex_cancel_all_pending_cmd(adapter);
 416         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 417         wake_up_interruptible(&adapter->hs_activate_wait_q);
 418
 419         /* Free lock variables */
 420         mwifiex_free_lock_list(adapter);
 421
 422         /* Free command buffer */
 423         mwifiex_dbg(adapter, INFO, "info: free cmd buffer\n");
 424         mwifiex_free_cmd_buffer(adapter);
 425
 426         for (idx = 0; idx < adapter->num_mem_types; idx++) {
 427                 struct memory_type_mapping *entry =
 428                                 &adapter->mem_type_mapping_tbl[idx];
 429
 430                 if (entry->mem_ptr) {
 431                         vfree(entry->mem_ptr);
 432                         entry->mem_ptr = NULL;
 433                 }
 434                 entry->mem_size = 0;
 435         }
 436
 437         if (adapter->drv_info_dump) {
 438                 vfree(adapter->drv_info_dump);
 439                 adapter->drv_info_dump = NULL;
 440                 adapter->drv_info_size = 0;
 441         }
 442
 443         if (adapter->sleep_cfm)
 444                 dev_kfree_skb_any(adapter->sleep_cfm);
 445 }
 446
 447 /*
 448  *  This function intializes the lock variables and
 449  *  the list heads.
 450  */
 451 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 452 {
 453         struct mwifiex_private *priv;
 454         s32 i, j;
 455
 456         spin_lock_init(&adapter->mwifiex_lock);
 457         spin_lock_init(&adapter->int_lock);
 458         spin_lock_init(&adapter->main_proc_lock);
 459         spin_lock_init(&adapter->mwifiex_cmd_lock);
 460         spin_lock_init(&adapter->queue_lock);
 461         for (i = 0; i < adapter->priv_num; i++) {
 462                 if (adapter->priv[i]) {
 463                         priv = adapter->priv[i];
 464                         spin_lock_init(&priv->rx_pkt_lock);
 465                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 466                         spin_lock_init(&priv->curr_bcn_buf_lock);
 467                         spin_lock_init(&priv->sta_list_spinlock);
 468                         spin_lock_init(&priv->auto_tdls_lock);
 469                 }
 470         }
 471
 472         /* Initialize cmd_free_q */
 473         INIT_LIST_HEAD(&adapter->cmd_free_q);
 474         /* Initialize cmd_pending_q */
 475         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 476         /* Initialize scan_pending_q */
 477         INIT_LIST_HEAD(&adapter->scan_pending_q);
 478
 479         spin_lock_init(&adapter->cmd_free_q_lock);
 480         spin_lock_init(&adapter->cmd_pending_q_lock);
 481         spin_lock_init(&adapter->scan_pending_q_lock);
 482         spin_lock_init(&adapter->rx_proc_lock);
 483
 484         skb_queue_head_init(&adapter->rx_data_q);
 485         skb_queue_head_init(&adapter->tx_data_q);
 486
 487         for (i = 0; i < adapter->priv_num; ++i) {
 488                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 489                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 490         }
 491
 492         for (i = 0; i < adapter->priv_num; i++) {
 493                 if (!adapter->priv[i])
 494                         continue;
 495                 priv = adapter->priv[i];
 496                 for (j = 0; j < MAX_NUM_TID; ++j)
 497                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 498                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 499                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 500                 INIT_LIST_HEAD(&priv->sta_list);
 501                 INIT_LIST_HEAD(&priv->auto_tdls_list);
 502                 skb_queue_head_init(&priv->tdls_txq);
 503                 skb_queue_head_init(&priv->bypass_txq);
 504
 505                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 506                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 507
 508                 spin_lock_init(&priv->ack_status_lock);
 509                 idr_init(&priv->ack_status_frames);
 510         }
 511
 512         return 0;
 513 }
 514
 515 /*
 516  * This function initializes the firmware.
 517  *
 518  * The following operations are performed sequentially -
 519  *      - Allocate adapter structure
 520  *      - Initialize the adapter structure
 521  *      - Initialize the private structure
 522  *      - Add BSS priority tables to the adapter structure
 523  *      - For each interface, send the init commands to firmware
 524  *      - Send the first command in command pending queue, if available
 525  */
 526 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 527 {
 528         int ret;
 529         struct mwifiex_private *priv;
 530         u8 i, first_sta = true;
 531         int is_cmd_pend_q_empty;
 532         unsigned long flags;
 533
 534         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 535
 536         /* Allocate memory for member of adapter structure */
 537         ret = mwifiex_allocate_adapter(adapter);
 538         if (ret)
 539                 return -1;
 540
 541         /* Initialize adapter structure */
 542         mwifiex_init_adapter(adapter);
 543
 544         for (i = 0; i < adapter->priv_num; i++) {
 545                 if (adapter->priv[i]) {
 546                         priv = adapter->priv[i];
 547
 548                         /* Initialize private structure */
 549                         ret = mwifiex_init_priv(priv);
 550                         if (ret)
 551                                 return -1;
 552                 }
 553         }
 554
 555         for (i = 0; i < adapter->priv_num; i++) {
 556                 if (adapter->priv[i]) {
 557                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta,
 558                                                    true);
 559                         if (ret == -1)
 560                                 return -1;
 561
 562                         first_sta = false;
 563                 }
 564         }
 565
 566         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 567         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 568         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 569         if (!is_cmd_pend_q_empty) {
 570                 /* Send the first command in queue and return */
 571                 if (mwifiex_main_process(adapter) != -1)
 572                         ret = -EINPROGRESS;
 573         } else {
 574                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 575         }
 576
 577         return ret;
 578 }
 579
 580 /*
 581  * This function deletes the BSS priority tables.
 582  *
 583  * The function traverses through all the allocated BSS priority nodes
 584  * in every BSS priority table and frees them.
 585  */
 586 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 587 {
 588         int i;
 589         struct mwifiex_adapter *adapter = priv->adapter;
 590         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
 591         struct list_head *head;
 592         spinlock_t *lock; /* bss priority lock */
 593         unsigned long flags;
 594
 595         for (i = 0; i < adapter->priv_num; ++i) {
 596                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 597                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 598                 mwifiex_dbg(adapter, INFO,
 599                             "info: delete BSS priority table,\t"
 600                             "bss_type = %d, bss_num = %d, i = %d,\t"
 601                             "head = %p\n",
 602                             priv->bss_type, priv->bss_num, i, head);
 603
 604                 {
 605                         spin_lock_irqsave(lock, flags);
 606                         if (list_empty(head)) {
 607                                 spin_unlock_irqrestore(lock, flags);
 608                                 continue;
 609                         }
 610                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 611                                                  list) {
 612                                 if (bssprio_node->priv == priv) {
 613                                         mwifiex_dbg(adapter, INFO,
 614                                                     "info: Delete\t"
 615                                                     "node %p, next = %p\n",
 616                                                     bssprio_node, tmp_node);
 617                                         list_del(&bssprio_node->list);
 618                                         kfree(bssprio_node);
 619                                 }
 620                         }
 621                         spin_unlock_irqrestore(lock, flags);
 622                 }
 623         }
 624 }
 625
 626 /*
 627  * This function frees the private structure, including cleans
 628  * up the TX and RX queues and frees the BSS priority tables.
 629  */
 630 void mwifiex_free_priv(struct mwifiex_private *priv)
 631 {
 632         mwifiex_clean_txrx(priv);
 633         mwifiex_delete_bss_prio_tbl(priv);
 634         mwifiex_free_curr_bcn(priv);
 635 }
 636
 637 /*
 638  * This function is used to shutdown the driver.
 639  *
 640  * The following operations are performed sequentially -
 641  *      - Check if already shut down
 642  *      - Make sure the main process has stopped
 643  *      - Clean up the Tx and Rx queues
 644  *      - Delete BSS priority tables
 645  *      - Free the adapter
 646  *      - Notify completion
 647  */
 648 int
 649 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 650 {
 651         int ret = -EINPROGRESS;
 652         struct mwifiex_private *priv;
 653         s32 i;
 654         unsigned long flags;
 655         struct sk_buff *skb;
 656
 657         /* mwifiex already shutdown */
 658         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 659                 return 0;
 660
 661         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 662         /* wait for mwifiex_process to complete */
 663         if (adapter->mwifiex_processing) {
 664                 mwifiex_dbg(adapter, WARN,
 665                             "main process is still running\n");
 666                 return ret;
 667         }
 668
 669         /* cancel current command */
 670         if (adapter->curr_cmd) {
 671                 mwifiex_dbg(adapter, WARN,
 672                             "curr_cmd is still in processing\n");
 673                 del_timer_sync(&adapter->cmd_timer);
 674                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 675                 adapter->curr_cmd = NULL;
 676         }
 677
 678         /* shut down mwifiex */
 679         mwifiex_dbg(adapter, MSG,
 680                     "info: shutdown mwifiex...\n");
 681
 682         /* Clean up Tx/Rx queues and delete BSS priority table */
 683         for (i = 0; i < adapter->priv_num; i++) {
 684                 if (adapter->priv[i]) {
 685                         priv = adapter->priv[i];
 686
 687                         mwifiex_clean_auto_tdls(priv);
 688                         mwifiex_abort_cac(priv);
 689                         mwifiex_clean_txrx(priv);
 690                         mwifiex_delete_bss_prio_tbl(priv);
 691                 }
 692         }
 693
 694         atomic_set(&adapter->tx_queued, 0);
 695         while ((skb = skb_dequeue(&adapter->tx_data_q)))
 696                 mwifiex_write_data_complete(adapter, skb, 0, 0);
 697
 698         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 699
 700         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 701                 struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 702
 703                 atomic_dec(&adapter->rx_pending);
 704                 priv = adapter->priv[rx_info->bss_num];
 705                 if (priv)
 706                         priv->stats.rx_dropped++;
 707
 708                 dev_kfree_skb_any(skb);
 709         }
 710
 711         spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 712
 713         spin_lock(&adapter->mwifiex_lock);
 714
 715         mwifiex_adapter_cleanup(adapter);
 716
 717         spin_unlock(&adapter->mwifiex_lock);
 718
 719         /* Notify completion */
 720         ret = mwifiex_shutdown_fw_complete(adapter);
 721
 722         return ret;
 723 }
 724
 725 /*
 726  * This function downloads the firmware to the card.
 727  *
 728  * The actual download is preceded by two sanity checks -
 729  *      - Check if firmware is already running
 730  *      - Check if the interface is the winner to download the firmware
 731  *
 732  * ...and followed by another -
 733  *      - Check if the firmware is downloaded successfully
 734  *
 735  * After download is successfully completed, the host interrupts are enabled.
 736  */
 737 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 738                     struct mwifiex_fw_image *pmfw)
 739 {
 740         int ret;
 741         u32 poll_num = 1;
 742
 743         if (adapter->if_ops.check_fw_status) {
 744                 adapter->winner = 0;
 745
 746                 /* check if firmware is already running */
 747                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 748                 if (!ret) {
 749                         mwifiex_dbg(adapter, MSG,
 750                                     "WLAN FW already running! Skip FW dnld\n");
 751                         return 0;
 752                 }
 753
 754                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 755
 756                 /* check if we are the winner for downloading FW */
 757                 if (!adapter->winner) {
 758                         mwifiex_dbg(adapter, MSG,
 759                                     "FW already running! Skip FW dnld\n");
 760                         goto poll_fw;
 761                 }
 762         }
 763
 764         if (pmfw) {
 765                 /* Download firmware with helper */
 766                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 767                 if (ret) {
 768                         mwifiex_dbg(adapter, ERROR,
 769                                     "prog_fw failed ret=%#x\n", ret);
 770                         return ret;
 771                 }
 772         }
 773
 774 poll_fw:
 775         /* Check if the firmware is downloaded successfully or not */
 776         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 777         if (ret)
 778                 mwifiex_dbg(adapter, ERROR,
 779                             "FW failed to be active in time\n");
 780
 781         return ret;
 782 }