drivers/net/wireless/mwifiex/init.c

   1 /*
   2  * Marvell Wireless LAN device driver: HW/FW Initialization
   3  *
   4  * Copyright (C) 2011, 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                 dev_err(adapter->dev, "%s: failed to alloc bss_prio\n",
  44                         __func__);
  45                 return -ENOMEM;
  46         }
  47
  48         bss_prio->priv = priv;
  49         INIT_LIST_HEAD(&bss_prio->list);
  50         if (!tbl[priv->bss_priority].bss_prio_cur)
  51                 tbl[priv->bss_priority].bss_prio_cur = bss_prio;
  52
  53         spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags);
  54         list_add_tail(&bss_prio->list, &tbl[priv->bss_priority].bss_prio_head);
  55         spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags);
  56
  57         return 0;
  58 }
  59
  60 static void scan_delay_timer_fn(unsigned long data)
  61 {
  62         struct mwifiex_private *priv = (struct mwifiex_private *)data;
  63         struct mwifiex_adapter *adapter = priv->adapter;
  64         struct cmd_ctrl_node *cmd_node, *tmp_node;
  65         unsigned long flags;
  66
  67         if (adapter->scan_delay_cnt == MWIFIEX_MAX_SCAN_DELAY_CNT) {
  68                 /*
  69                  * Abort scan operation by cancelling all pending scan
  70                  * commands
  71                  */
  72                 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
  73                 list_for_each_entry_safe(cmd_node, tmp_node,
  74                                          &adapter->scan_pending_q, list) {
  75                         list_del(&cmd_node->list);
  76                         cmd_node->wait_q_enabled = false;
  77                         mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
  78                 }
  79                 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
  80
  81                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
  82                 adapter->scan_processing = false;
  83                 adapter->scan_delay_cnt = 0;
  84                 adapter->empty_tx_q_cnt = 0;
  85                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
  86
  87                 if (priv->user_scan_cfg) {
  88                         if (priv->scan_request) {
  89                                 dev_dbg(priv->adapter->dev,
  90                                         "info: aborting scan\n");
  91                                 cfg80211_scan_done(priv->scan_request, 1);
  92                                 priv->scan_request = NULL;
  93                         } else {
  94                                 dev_dbg(priv->adapter->dev,
  95                                         "info: scan already aborted\n");
  96                         }
  97
  98                         kfree(priv->user_scan_cfg);
  99                         priv->user_scan_cfg = NULL;
 100                 }
 101                 goto done;
 102         }
 103
 104         if (!atomic_read(&priv->adapter->is_tx_received)) {
 105                 adapter->empty_tx_q_cnt++;
 106                 if (adapter->empty_tx_q_cnt == MWIFIEX_MAX_EMPTY_TX_Q_CNT) {
 107                         /*
 108                          * No Tx traffic for 200msec. Get scan command from
 109                          * scan pending queue and put to cmd pending queue to
 110                          * resume scan operation
 111                          */
 112                         adapter->scan_delay_cnt = 0;
 113                         adapter->empty_tx_q_cnt = 0;
 114                         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
 115                         cmd_node = list_first_entry(&adapter->scan_pending_q,
 116                                                     struct cmd_ctrl_node, list);
 117                         list_del(&cmd_node->list);
 118                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
 119                                                flags);
 120
 121                         mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
 122                                                         true);
 123                         queue_work(adapter->workqueue, &adapter->main_work);
 124                         goto done;
 125                 }
 126         } else {
 127                 adapter->empty_tx_q_cnt = 0;
 128         }
 129
 130         /* Delay scan operation further by 20msec */
 131         mod_timer(&priv->scan_delay_timer, jiffies +
 132                   msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
 133         adapter->scan_delay_cnt++;
 134
 135 done:
 136         if (atomic_read(&priv->adapter->is_tx_received))
 137                 atomic_set(&priv->adapter->is_tx_received, false);
 138
 139         return;
 140 }
 141
 142 /*
 143  * This function initializes the private structure and sets default
 144  * values to the members.
 145  *
 146  * Additionally, it also initializes all the locks and sets up all the
 147  * lists.
 148  */
 149 static int mwifiex_init_priv(struct mwifiex_private *priv)
 150 {
 151         u32 i;
 152
 153         priv->media_connected = false;
 154         memset(priv->curr_addr, 0xff, ETH_ALEN);
 155
 156         priv->pkt_tx_ctrl = 0;
 157         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
 158         priv->data_rate = 0;    /* Initially indicate the rate as auto */
 159         priv->is_data_rate_auto = true;
 160         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
 161         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
 162
 163         priv->sec_info.wep_enabled = 0;
 164         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
 165         priv->sec_info.encryption_mode = 0;
 166         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
 167                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
 168         priv->wep_key_curr_index = 0;
 169         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
 170                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
 171
 172         priv->beacon_period = 100; /* beacon interval */ ;
 173         priv->attempted_bss_desc = NULL;
 174         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 175         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 176
 177         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 178         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 179         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 180         priv->assoc_rsp_size = 0;
 181         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 182         priv->atim_window = 0;
 183         priv->adhoc_state = ADHOC_IDLE;
 184         priv->tx_power_level = 0;
 185         priv->max_tx_power_level = 0;
 186         priv->min_tx_power_level = 0;
 187         priv->tx_rate = 0;
 188         priv->rxpd_htinfo = 0;
 189         priv->rxpd_rate = 0;
 190         priv->rate_bitmap = 0;
 191         priv->data_rssi_last = 0;
 192         priv->data_rssi_avg = 0;
 193         priv->data_nf_avg = 0;
 194         priv->data_nf_last = 0;
 195         priv->bcn_rssi_last = 0;
 196         priv->bcn_rssi_avg = 0;
 197         priv->bcn_nf_avg = 0;
 198         priv->bcn_nf_last = 0;
 199         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 200         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 201         priv->wpa_ie_len = 0;
 202         priv->wpa_is_gtk_set = false;
 203
 204         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 205         priv->assoc_tlv_buf_len = 0;
 206         memset(&priv->wps, 0, sizeof(priv->wps));
 207         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 208         priv->gen_ie_buf_len = 0;
 209         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 210
 211         priv->wmm_required = true;
 212         priv->wmm_enabled = false;
 213         priv->wmm_qosinfo = 0;
 214         priv->curr_bcn_buf = NULL;
 215         priv->curr_bcn_size = 0;
 216         priv->wps_ie = NULL;
 217         priv->wps_ie_len = 0;
 218         priv->mgmt_rx_freq = 2437;
 219
 220         priv->scan_block = false;
 221
 222         setup_timer(&priv->scan_delay_timer, scan_delay_timer_fn,
 223                     (unsigned long)priv);
 224
 225         return mwifiex_add_bss_prio_tbl(priv);
 226 }
 227
 228 /*
 229  * This function allocates buffers for members of the adapter
 230  * structure.
 231  *
 232  * The memory allocated includes scan table, command buffers, and
 233  * sleep confirm command buffer. In addition, the queues are
 234  * also initialized.
 235  */
 236 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 237 {
 238         int ret;
 239
 240         /* Allocate command buffer */
 241         ret = mwifiex_alloc_cmd_buffer(adapter);
 242         if (ret) {
 243                 dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
 244                         __func__);
 245                 return -1;
 246         }
 247
 248         adapter->sleep_cfm =
 249                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 250                               + INTF_HEADER_LEN);
 251
 252         if (!adapter->sleep_cfm) {
 253                 dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
 254                         " cmd buffer\n", __func__);
 255                 return -1;
 256         }
 257         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 258
 259         return 0;
 260 }
 261
 262 /*
 263  * This function initializes the adapter structure and sets default
 264  * values to the members of adapter.
 265  *
 266  * This also initializes the WMM related parameters in the driver private
 267  * structures.
 268  */
 269 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 270 {
 271         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 272
 273         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 274
 275         adapter->cmd_sent = false;
 276
 277         if (adapter->iface_type == MWIFIEX_PCIE)
 278                 adapter->data_sent = false;
 279         else
 280                 adapter->data_sent = true;
 281
 282         adapter->cmd_resp_received = false;
 283         adapter->event_received = false;
 284         adapter->data_received = false;
 285
 286         adapter->surprise_removed = false;
 287
 288         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 289
 290         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 291         adapter->ps_state = PS_STATE_AWAKE;
 292         adapter->need_to_wakeup = false;
 293
 294         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 295         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 296         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 297         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 298
 299         adapter->scan_probes = 1;
 300
 301         adapter->multiple_dtim = 1;
 302
 303         adapter->local_listen_interval = 0;     /* default value in firmware
 304                                                    will be used */
 305
 306         adapter->is_deep_sleep = false;
 307
 308         adapter->delay_null_pkt = false;
 309         adapter->delay_to_ps = 1000;
 310         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 311
 312         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 313                                            default */
 314         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 315                                            default */
 316         adapter->pm_wakeup_card_req = false;
 317
 318         adapter->pm_wakeup_fw_try = false;
 319
 320         adapter->max_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 321         adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 322         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 323
 324         adapter->is_hs_configured = false;
 325         adapter->hs_cfg.conditions = cpu_to_le32(HOST_SLEEP_CFG_COND_DEF);
 326         adapter->hs_cfg.gpio = HOST_SLEEP_CFG_GPIO_DEF;
 327         adapter->hs_cfg.gap = HOST_SLEEP_CFG_GAP_DEF;
 328         adapter->hs_activated = false;
 329
 330         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 331         adapter->hw_dot_11n_dev_cap = 0;
 332         adapter->hw_dev_mcs_support = 0;
 333         adapter->sec_chan_offset = 0;
 334         adapter->adhoc_11n_enabled = false;
 335
 336         mwifiex_wmm_init(adapter);
 337
 338         if (adapter->sleep_cfm) {
 339                 sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 340                                                 adapter->sleep_cfm->data;
 341                 memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 342                 sleep_cfm_buf->command =
 343                                 cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 344                 sleep_cfm_buf->size =
 345                                 cpu_to_le16(adapter->sleep_cfm->len);
 346                 sleep_cfm_buf->result = 0;
 347                 sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 348                 sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 349         }
 350         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 351         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 352         adapter->tx_lock_flag = false;
 353         adapter->null_pkt_interval = 0;
 354         adapter->fw_bands = 0;
 355         adapter->config_bands = 0;
 356         adapter->adhoc_start_band = 0;
 357         adapter->scan_channels = NULL;
 358         adapter->fw_release_number = 0;
 359         adapter->fw_cap_info = 0;
 360         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 361         adapter->event_cause = 0;
 362         adapter->region_code = 0;
 363         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 364         adapter->adhoc_awake_period = 0;
 365         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 366         adapter->arp_filter_size = 0;
 367         adapter->channel_type = NL80211_CHAN_HT20;
 368         adapter->empty_tx_q_cnt = 0;
 369 }
 370
 371 /*
 372  * This function sets trans_start per tx_queue
 373  */
 374 void mwifiex_set_trans_start(struct net_device *dev)
 375 {
 376         int i;
 377
 378         for (i = 0; i < dev->num_tx_queues; i++)
 379                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 380
 381         dev->trans_start = jiffies;
 382 }
 383
 384 /*
 385  * This function wakes up all queues in net_device
 386  */
 387 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 388                                         struct mwifiex_adapter *adapter)
 389 {
 390         unsigned long dev_queue_flags;
 391
 392         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 393         netif_tx_wake_all_queues(netdev);
 394         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 395 }
 396
 397 /*
 398  * This function stops all queues in net_device
 399  */
 400 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 401                                         struct mwifiex_adapter *adapter)
 402 {
 403         unsigned long dev_queue_flags;
 404
 405         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 406         netif_tx_stop_all_queues(netdev);
 407         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 408 }
 409
 410 /*
 411  *  This function releases the lock variables and frees the locks and
 412  *  associated locks.
 413  */
 414 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 415 {
 416         struct mwifiex_private *priv;
 417         s32 i, j;
 418
 419         /* Free lists */
 420         list_del(&adapter->cmd_free_q);
 421         list_del(&adapter->cmd_pending_q);
 422         list_del(&adapter->scan_pending_q);
 423
 424         for (i = 0; i < adapter->priv_num; i++)
 425                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 426
 427         for (i = 0; i < adapter->priv_num; i++) {
 428                 if (adapter->priv[i]) {
 429                         priv = adapter->priv[i];
 430                         for (j = 0; j < MAX_NUM_TID; ++j)
 431                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 432                         list_del(&priv->tx_ba_stream_tbl_ptr);
 433                         list_del(&priv->rx_reorder_tbl_ptr);
 434                 }
 435         }
 436 }
 437
 438 /*
 439  * This function frees the adapter structure.
 440  *
 441  * The freeing operation is done recursively, by canceling all
 442  * pending commands, freeing the member buffers previously
 443  * allocated (command buffers, scan table buffer, sleep confirm
 444  * command buffer), stopping the timers and calling the cleanup
 445  * routines for every interface, before the actual adapter
 446  * structure is freed.
 447  */
 448 static void
 449 mwifiex_free_adapter(struct mwifiex_adapter *adapter)
 450 {
 451         if (!adapter) {
 452                 pr_err("%s: adapter is NULL\n", __func__);
 453                 return;
 454         }
 455
 456         mwifiex_cancel_all_pending_cmd(adapter);
 457
 458         /* Free lock variables */
 459         mwifiex_free_lock_list(adapter);
 460
 461         /* Free command buffer */
 462         dev_dbg(adapter->dev, "info: free cmd buffer\n");
 463         mwifiex_free_cmd_buffer(adapter);
 464
 465         del_timer(&adapter->cmd_timer);
 466
 467         dev_dbg(adapter->dev, "info: free scan table\n");
 468
 469         adapter->if_ops.cleanup_if(adapter);
 470
 471         if (adapter->sleep_cfm)
 472                 dev_kfree_skb_any(adapter->sleep_cfm);
 473 }
 474
 475 /*
 476  *  This function intializes the lock variables and
 477  *  the list heads.
 478  */
 479 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 480 {
 481         struct mwifiex_private *priv;
 482         s32 i, j;
 483
 484         spin_lock_init(&adapter->mwifiex_lock);
 485         spin_lock_init(&adapter->int_lock);
 486         spin_lock_init(&adapter->main_proc_lock);
 487         spin_lock_init(&adapter->mwifiex_cmd_lock);
 488         spin_lock_init(&adapter->queue_lock);
 489         for (i = 0; i < adapter->priv_num; i++) {
 490                 if (adapter->priv[i]) {
 491                         priv = adapter->priv[i];
 492                         spin_lock_init(&priv->rx_pkt_lock);
 493                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 494                         spin_lock_init(&priv->curr_bcn_buf_lock);
 495                 }
 496         }
 497
 498         /* Initialize cmd_free_q */
 499         INIT_LIST_HEAD(&adapter->cmd_free_q);
 500         /* Initialize cmd_pending_q */
 501         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 502         /* Initialize scan_pending_q */
 503         INIT_LIST_HEAD(&adapter->scan_pending_q);
 504
 505         spin_lock_init(&adapter->cmd_free_q_lock);
 506         spin_lock_init(&adapter->cmd_pending_q_lock);
 507         spin_lock_init(&adapter->scan_pending_q_lock);
 508
 509         for (i = 0; i < adapter->priv_num; ++i) {
 510                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 511                 adapter->bss_prio_tbl[i].bss_prio_cur = NULL;
 512                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 513         }
 514
 515         for (i = 0; i < adapter->priv_num; i++) {
 516                 if (!adapter->priv[i])
 517                         continue;
 518                 priv = adapter->priv[i];
 519                 for (j = 0; j < MAX_NUM_TID; ++j) {
 520                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 521                         spin_lock_init(&priv->wmm.tid_tbl_ptr[j].tid_tbl_lock);
 522                 }
 523                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 524                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 525
 526                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 527                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 528         }
 529
 530         return 0;
 531 }
 532
 533 /*
 534  * This function initializes the firmware.
 535  *
 536  * The following operations are performed sequentially -
 537  *      - Allocate adapter structure
 538  *      - Initialize the adapter structure
 539  *      - Initialize the private structure
 540  *      - Add BSS priority tables to the adapter structure
 541  *      - For each interface, send the init commands to firmware
 542  *      - Send the first command in command pending queue, if available
 543  */
 544 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 545 {
 546         int ret;
 547         struct mwifiex_private *priv;
 548         u8 i, first_sta = true;
 549         int is_cmd_pend_q_empty;
 550         unsigned long flags;
 551
 552         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 553
 554         /* Allocate memory for member of adapter structure */
 555         ret = mwifiex_allocate_adapter(adapter);
 556         if (ret)
 557                 return -1;
 558
 559         /* Initialize adapter structure */
 560         mwifiex_init_adapter(adapter);
 561
 562         for (i = 0; i < adapter->priv_num; i++) {
 563                 if (adapter->priv[i]) {
 564                         priv = adapter->priv[i];
 565
 566                         /* Initialize private structure */
 567                         ret = mwifiex_init_priv(priv);
 568                         if (ret)
 569                                 return -1;
 570                 }
 571         }
 572         for (i = 0; i < adapter->priv_num; i++) {
 573                 if (adapter->priv[i]) {
 574                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
 575                         if (ret == -1)
 576                                 return -1;
 577
 578                         first_sta = false;
 579                 }
 580         }
 581
 582         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 583         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 584         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 585         if (!is_cmd_pend_q_empty) {
 586                 /* Send the first command in queue and return */
 587                 if (mwifiex_main_process(adapter) != -1)
 588                         ret = -EINPROGRESS;
 589         } else {
 590                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 591         }
 592
 593         return ret;
 594 }
 595
 596 /*
 597  * This function deletes the BSS priority tables.
 598  *
 599  * The function traverses through all the allocated BSS priority nodes
 600  * in every BSS priority table and frees them.
 601  */
 602 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 603 {
 604         int i;
 605         struct mwifiex_adapter *adapter = priv->adapter;
 606         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node, **cur;
 607         struct list_head *head;
 608         spinlock_t *lock; /* bss priority lock */
 609         unsigned long flags;
 610
 611         for (i = 0; i < adapter->priv_num; ++i) {
 612                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 613                 cur = &adapter->bss_prio_tbl[i].bss_prio_cur;
 614                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 615                 dev_dbg(adapter->dev, "info: delete BSS priority table,"
 616                                 " bss_type = %d, bss_num = %d, i = %d,"
 617                                 " head = %p, cur = %p\n",
 618                               priv->bss_type, priv->bss_num, i, head, *cur);
 619                 if (*cur) {
 620                         spin_lock_irqsave(lock, flags);
 621                         if (list_empty(head)) {
 622                                 spin_unlock_irqrestore(lock, flags);
 623                                 continue;
 624                         }
 625                         bssprio_node = list_first_entry(head,
 626                                         struct mwifiex_bss_prio_node, list);
 627                         spin_unlock_irqrestore(lock, flags);
 628
 629                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 630                                                  list) {
 631                                 if (bssprio_node->priv == priv) {
 632                                         dev_dbg(adapter->dev, "info: Delete "
 633                                                 "node %p, next = %p\n",
 634                                                 bssprio_node, tmp_node);
 635                                         spin_lock_irqsave(lock, flags);
 636                                         list_del(&bssprio_node->list);
 637                                         spin_unlock_irqrestore(lock, flags);
 638                                         kfree(bssprio_node);
 639                                 }
 640                         }
 641                         *cur = (struct mwifiex_bss_prio_node *)head;
 642                 }
 643         }
 644 }
 645
 646 /*
 647  * This function is used to shutdown the driver.
 648  *
 649  * The following operations are performed sequentially -
 650  *      - Check if already shut down
 651  *      - Make sure the main process has stopped
 652  *      - Clean up the Tx and Rx queues
 653  *      - Delete BSS priority tables
 654  *      - Free the adapter
 655  *      - Notify completion
 656  */
 657 int
 658 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 659 {
 660         int ret = -EINPROGRESS;
 661         struct mwifiex_private *priv;
 662         s32 i;
 663         unsigned long flags;
 664
 665         /* mwifiex already shutdown */
 666         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 667                 return 0;
 668
 669         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 670         /* wait for mwifiex_process to complete */
 671         if (adapter->mwifiex_processing) {
 672                 dev_warn(adapter->dev, "main process is still running\n");
 673                 return ret;
 674         }
 675
 676         /* shut down mwifiex */
 677         dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");
 678
 679         /* Clean up Tx/Rx queues and delete BSS priority table */
 680         for (i = 0; i < adapter->priv_num; i++) {
 681                 if (adapter->priv[i]) {
 682                         priv = adapter->priv[i];
 683
 684                         mwifiex_clean_txrx(priv);
 685                         mwifiex_delete_bss_prio_tbl(priv);
 686                 }
 687         }
 688
 689         spin_lock_irqsave(&adapter->mwifiex_lock, flags);
 690
 691         /* Free adapter structure */
 692         mwifiex_free_adapter(adapter);
 693
 694         spin_unlock_irqrestore(&adapter->mwifiex_lock, flags);
 695
 696         /* Notify completion */
 697         ret = mwifiex_shutdown_fw_complete(adapter);
 698
 699         return ret;
 700 }
 701
 702 /*
 703  * This function downloads the firmware to the card.
 704  *
 705  * The actual download is preceded by two sanity checks -
 706  *      - Check if firmware is already running
 707  *      - Check if the interface is the winner to download the firmware
 708  *
 709  * ...and followed by another -
 710  *      - Check if the firmware is downloaded successfully
 711  *
 712  * After download is successfully completed, the host interrupts are enabled.
 713  */
 714 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 715                     struct mwifiex_fw_image *pmfw)
 716 {
 717         int ret;
 718         u32 poll_num = 1;
 719
 720         adapter->winner = 0;
 721
 722         /* Check if firmware is already running */
 723         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 724         if (!ret) {
 725                 dev_notice(adapter->dev,
 726                            "WLAN FW already running! Skip FW download\n");
 727                 goto done;
 728         }
 729         poll_num = MAX_FIRMWARE_POLL_TRIES;
 730
 731         /* Check if we are the winner for downloading FW */
 732         if (!adapter->winner) {
 733                 dev_notice(adapter->dev,
 734                            "Other intf already running! Skip FW download\n");
 735                 poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
 736                 goto poll_fw;
 737         }
 738         if (pmfw) {
 739                 /* Download firmware with helper */
 740                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 741                 if (ret) {
 742                         dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
 743                         return ret;
 744                 }
 745         }
 746
 747 poll_fw:
 748         /* Check if the firmware is downloaded successfully or not */
 749         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 750         if (ret) {
 751                 dev_err(adapter->dev, "FW failed to be active in time\n");
 752                 return -1;
 753         }
 754 done:
 755         /* re-enable host interrupt for mwifiex after fw dnld is successful */
 756         adapter->if_ops.enable_int(adapter);
 757         return ret;
 758 }