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                         mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
  77                 }
  78                 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
  79
  80                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
  81                 adapter->scan_processing = false;
  82                 adapter->scan_delay_cnt = 0;
  83                 adapter->empty_tx_q_cnt = 0;
  84                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
  85
  86                 if (priv->user_scan_cfg) {
  87                         dev_dbg(priv->adapter->dev,
  88                                 "info: %s: scan aborted\n", __func__);
  89                         cfg80211_scan_done(priv->scan_request, 1);
  90                         priv->scan_request = NULL;
  91                         kfree(priv->user_scan_cfg);
  92                         priv->user_scan_cfg = NULL;
  93                 }
  94
  95                 if (priv->scan_pending_on_block) {
  96                         priv->scan_pending_on_block = false;
  97                         up(&priv->async_sem);
  98                 }
  99                 goto done;
 100         }
 101
 102         if (!atomic_read(&priv->adapter->is_tx_received)) {
 103                 adapter->empty_tx_q_cnt++;
 104                 if (adapter->empty_tx_q_cnt == MWIFIEX_MAX_EMPTY_TX_Q_CNT) {
 105                         /*
 106                          * No Tx traffic for 200msec. Get scan command from
 107                          * scan pending queue and put to cmd pending queue to
 108                          * resume scan operation
 109                          */
 110                         adapter->scan_delay_cnt = 0;
 111                         adapter->empty_tx_q_cnt = 0;
 112                         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
 113                         cmd_node = list_first_entry(&adapter->scan_pending_q,
 114                                                     struct cmd_ctrl_node, list);
 115                         list_del(&cmd_node->list);
 116                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
 117                                                flags);
 118
 119                         mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
 120                                                         true);
 121                         queue_work(adapter->workqueue, &adapter->main_work);
 122                         goto done;
 123                 }
 124         } else {
 125                 adapter->empty_tx_q_cnt = 0;
 126         }
 127
 128         /* Delay scan operation further by 20msec */
 129         mod_timer(&priv->scan_delay_timer, jiffies +
 130                   msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
 131         adapter->scan_delay_cnt++;
 132
 133 done:
 134         if (atomic_read(&priv->adapter->is_tx_received))
 135                 atomic_set(&priv->adapter->is_tx_received, false);
 136
 137         return;
 138 }
 139
 140 /*
 141  * This function initializes the private structure and sets default
 142  * values to the members.
 143  *
 144  * Additionally, it also initializes all the locks and sets up all the
 145  * lists.
 146  */
 147 int mwifiex_init_priv(struct mwifiex_private *priv)
 148 {
 149         u32 i;
 150
 151         priv->media_connected = false;
 152         memset(priv->curr_addr, 0xff, ETH_ALEN);
 153
 154         priv->pkt_tx_ctrl = 0;
 155         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
 156         priv->data_rate = 0;    /* Initially indicate the rate as auto */
 157         priv->is_data_rate_auto = true;
 158         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
 159         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
 160
 161         priv->sec_info.wep_enabled = 0;
 162         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
 163         priv->sec_info.encryption_mode = 0;
 164         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
 165                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
 166         priv->wep_key_curr_index = 0;
 167         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
 168                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
 169
 170         priv->beacon_period = 100; /* beacon interval */ ;
 171         priv->attempted_bss_desc = NULL;
 172         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 173         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 174
 175         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 176         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 177         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 178         priv->assoc_rsp_size = 0;
 179         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 180         priv->atim_window = 0;
 181         priv->adhoc_state = ADHOC_IDLE;
 182         priv->tx_power_level = 0;
 183         priv->max_tx_power_level = 0;
 184         priv->min_tx_power_level = 0;
 185         priv->tx_rate = 0;
 186         priv->rxpd_htinfo = 0;
 187         priv->rxpd_rate = 0;
 188         priv->rate_bitmap = 0;
 189         priv->data_rssi_last = 0;
 190         priv->data_rssi_avg = 0;
 191         priv->data_nf_avg = 0;
 192         priv->data_nf_last = 0;
 193         priv->bcn_rssi_last = 0;
 194         priv->bcn_rssi_avg = 0;
 195         priv->bcn_nf_avg = 0;
 196         priv->bcn_nf_last = 0;
 197         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 198         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 199         priv->wpa_ie_len = 0;
 200         priv->wpa_is_gtk_set = false;
 201
 202         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 203         priv->assoc_tlv_buf_len = 0;
 204         memset(&priv->wps, 0, sizeof(priv->wps));
 205         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 206         priv->gen_ie_buf_len = 0;
 207         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 208
 209         priv->wmm_required = true;
 210         priv->wmm_enabled = false;
 211         priv->wmm_qosinfo = 0;
 212         priv->curr_bcn_buf = NULL;
 213         priv->curr_bcn_size = 0;
 214         priv->wps_ie = NULL;
 215         priv->wps_ie_len = 0;
 216         priv->ap_11n_enabled = 0;
 217         memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg));
 218
 219         priv->scan_block = false;
 220
 221         setup_timer(&priv->scan_delay_timer, scan_delay_timer_fn,
 222                     (unsigned long)priv);
 223
 224         return mwifiex_add_bss_prio_tbl(priv);
 225 }
 226
 227 /*
 228  * This function allocates buffers for members of the adapter
 229  * structure.
 230  *
 231  * The memory allocated includes scan table, command buffers, and
 232  * sleep confirm command buffer. In addition, the queues are
 233  * also initialized.
 234  */
 235 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 236 {
 237         int ret;
 238
 239         /* Allocate command buffer */
 240         ret = mwifiex_alloc_cmd_buffer(adapter);
 241         if (ret) {
 242                 dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
 243                         __func__);
 244                 return -1;
 245         }
 246
 247         adapter->sleep_cfm =
 248                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 249                               + INTF_HEADER_LEN);
 250
 251         if (!adapter->sleep_cfm) {
 252                 dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
 253                         " cmd buffer\n", __func__);
 254                 return -1;
 255         }
 256         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 257
 258         return 0;
 259 }
 260
 261 /*
 262  * This function initializes the adapter structure and sets default
 263  * values to the members of adapter.
 264  *
 265  * This also initializes the WMM related parameters in the driver private
 266  * structures.
 267  */
 268 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 269 {
 270         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 271
 272         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 273
 274         adapter->cmd_sent = false;
 275
 276         if (adapter->iface_type == MWIFIEX_SDIO)
 277                 adapter->data_sent = true;
 278         else
 279                 adapter->data_sent = false;
 280
 281         adapter->cmd_resp_received = false;
 282         adapter->event_received = false;
 283         adapter->data_received = false;
 284
 285         adapter->surprise_removed = false;
 286
 287         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 288
 289         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 290         adapter->ps_state = PS_STATE_AWAKE;
 291         adapter->need_to_wakeup = false;
 292
 293         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 294         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 295         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 296         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 297
 298         adapter->scan_probes = 1;
 299
 300         adapter->multiple_dtim = 1;
 301
 302         adapter->local_listen_interval = 0;     /* default value in firmware
 303                                                    will be used */
 304
 305         adapter->is_deep_sleep = false;
 306
 307         adapter->delay_null_pkt = false;
 308         adapter->delay_to_ps = 1000;
 309         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 310
 311         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 312                                            default */
 313         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 314                                            default */
 315         adapter->pm_wakeup_card_req = false;
 316
 317         adapter->pm_wakeup_fw_try = false;
 318
 319         adapter->max_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 320         adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 321         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 322
 323         adapter->is_hs_configured = false;
 324         adapter->hs_cfg.conditions = cpu_to_le32(HOST_SLEEP_CFG_COND_DEF);
 325         adapter->hs_cfg.gpio = HOST_SLEEP_CFG_GPIO_DEF;
 326         adapter->hs_cfg.gap = HOST_SLEEP_CFG_GAP_DEF;
 327         adapter->hs_activated = false;
 328
 329         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 330         adapter->hw_dot_11n_dev_cap = 0;
 331         adapter->hw_dev_mcs_support = 0;
 332         adapter->sec_chan_offset = 0;
 333         adapter->adhoc_11n_enabled = false;
 334
 335         mwifiex_wmm_init(adapter);
 336
 337         if (adapter->sleep_cfm) {
 338                 sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 339                                                 adapter->sleep_cfm->data;
 340                 memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 341                 sleep_cfm_buf->command =
 342                                 cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 343                 sleep_cfm_buf->size =
 344                                 cpu_to_le16(adapter->sleep_cfm->len);
 345                 sleep_cfm_buf->result = 0;
 346                 sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 347                 sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 348         }
 349         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 350         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 351         adapter->tx_lock_flag = false;
 352         adapter->null_pkt_interval = 0;
 353         adapter->fw_bands = 0;
 354         adapter->config_bands = 0;
 355         adapter->adhoc_start_band = 0;
 356         adapter->scan_channels = NULL;
 357         adapter->fw_release_number = 0;
 358         adapter->fw_cap_info = 0;
 359         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 360         adapter->event_cause = 0;
 361         adapter->region_code = 0;
 362         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 363         adapter->adhoc_awake_period = 0;
 364         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 365         adapter->arp_filter_size = 0;
 366         adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
 367         adapter->empty_tx_q_cnt = 0;
 368 }
 369
 370 /*
 371  * This function sets trans_start per tx_queue
 372  */
 373 void mwifiex_set_trans_start(struct net_device *dev)
 374 {
 375         int i;
 376
 377         for (i = 0; i < dev->num_tx_queues; i++)
 378                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 379
 380         dev->trans_start = jiffies;
 381 }
 382
 383 /*
 384  * This function wakes up all queues in net_device
 385  */
 386 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 387                                         struct mwifiex_adapter *adapter)
 388 {
 389         unsigned long dev_queue_flags;
 390
 391         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 392         netif_tx_wake_all_queues(netdev);
 393         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 394 }
 395
 396 /*
 397  * This function stops all queues in net_device
 398  */
 399 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 400                                         struct mwifiex_adapter *adapter)
 401 {
 402         unsigned long dev_queue_flags;
 403
 404         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 405         netif_tx_stop_all_queues(netdev);
 406         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 407 }
 408
 409 /*
 410  *  This function releases the lock variables and frees the locks and
 411  *  associated locks.
 412  */
 413 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 414 {
 415         struct mwifiex_private *priv;
 416         s32 i, j;
 417
 418         /* Free lists */
 419         list_del(&adapter->cmd_free_q);
 420         list_del(&adapter->cmd_pending_q);
 421         list_del(&adapter->scan_pending_q);
 422
 423         for (i = 0; i < adapter->priv_num; i++)
 424                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 425
 426         for (i = 0; i < adapter->priv_num; i++) {
 427                 if (adapter->priv[i]) {
 428                         priv = adapter->priv[i];
 429                         for (j = 0; j < MAX_NUM_TID; ++j)
 430                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 431                         list_del(&priv->tx_ba_stream_tbl_ptr);
 432                         list_del(&priv->rx_reorder_tbl_ptr);
 433                         list_del(&priv->sta_list);
 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         if (adapter->if_ops.cleanup_if)
 470                 adapter->if_ops.cleanup_if(adapter);
 471
 472         if (adapter->sleep_cfm)
 473                 dev_kfree_skb_any(adapter->sleep_cfm);
 474 }
 475
 476 /*
 477  *  This function intializes the lock variables and
 478  *  the list heads.
 479  */
 480 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 481 {
 482         struct mwifiex_private *priv;
 483         s32 i, j;
 484
 485         spin_lock_init(&adapter->mwifiex_lock);
 486         spin_lock_init(&adapter->int_lock);
 487         spin_lock_init(&adapter->main_proc_lock);
 488         spin_lock_init(&adapter->mwifiex_cmd_lock);
 489         spin_lock_init(&adapter->queue_lock);
 490         for (i = 0; i < adapter->priv_num; i++) {
 491                 if (adapter->priv[i]) {
 492                         priv = adapter->priv[i];
 493                         spin_lock_init(&priv->rx_pkt_lock);
 494                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 495                         spin_lock_init(&priv->curr_bcn_buf_lock);
 496                         spin_lock_init(&priv->sta_list_spinlock);
 497                 }
 498         }
 499
 500         /* Initialize cmd_free_q */
 501         INIT_LIST_HEAD(&adapter->cmd_free_q);
 502         /* Initialize cmd_pending_q */
 503         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 504         /* Initialize scan_pending_q */
 505         INIT_LIST_HEAD(&adapter->scan_pending_q);
 506
 507         spin_lock_init(&adapter->cmd_free_q_lock);
 508         spin_lock_init(&adapter->cmd_pending_q_lock);
 509         spin_lock_init(&adapter->scan_pending_q_lock);
 510
 511         skb_queue_head_init(&adapter->usb_rx_data_q);
 512
 513         for (i = 0; i < adapter->priv_num; ++i) {
 514                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 515                 adapter->bss_prio_tbl[i].bss_prio_cur = NULL;
 516                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 517         }
 518
 519         for (i = 0; i < adapter->priv_num; i++) {
 520                 if (!adapter->priv[i])
 521                         continue;
 522                 priv = adapter->priv[i];
 523                 for (j = 0; j < MAX_NUM_TID; ++j) {
 524                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 525                         spin_lock_init(&priv->wmm.tid_tbl_ptr[j].tid_tbl_lock);
 526                 }
 527                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 528                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 529                 INIT_LIST_HEAD(&priv->sta_list);
 530
 531                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 532                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 533         }
 534
 535         return 0;
 536 }
 537
 538 /*
 539  * This function initializes the firmware.
 540  *
 541  * The following operations are performed sequentially -
 542  *      - Allocate adapter structure
 543  *      - Initialize the adapter structure
 544  *      - Initialize the private structure
 545  *      - Add BSS priority tables to the adapter structure
 546  *      - For each interface, send the init commands to firmware
 547  *      - Send the first command in command pending queue, if available
 548  */
 549 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 550 {
 551         int ret;
 552         struct mwifiex_private *priv;
 553         u8 i, first_sta = true;
 554         int is_cmd_pend_q_empty;
 555         unsigned long flags;
 556
 557         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 558
 559         /* Allocate memory for member of adapter structure */
 560         ret = mwifiex_allocate_adapter(adapter);
 561         if (ret)
 562                 return -1;
 563
 564         /* Initialize adapter structure */
 565         mwifiex_init_adapter(adapter);
 566
 567         for (i = 0; i < adapter->priv_num; i++) {
 568                 if (adapter->priv[i]) {
 569                         priv = adapter->priv[i];
 570
 571                         /* Initialize private structure */
 572                         ret = mwifiex_init_priv(priv);
 573                         if (ret)
 574                                 return -1;
 575                 }
 576         }
 577         for (i = 0; i < adapter->priv_num; i++) {
 578                 if (adapter->priv[i]) {
 579                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
 580                         if (ret == -1)
 581                                 return -1;
 582
 583                         first_sta = false;
 584                 }
 585         }
 586
 587         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 588         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 589         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 590         if (!is_cmd_pend_q_empty) {
 591                 /* Send the first command in queue and return */
 592                 if (mwifiex_main_process(adapter) != -1)
 593                         ret = -EINPROGRESS;
 594         } else {
 595                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 596         }
 597
 598         return ret;
 599 }
 600
 601 /*
 602  * This function deletes the BSS priority tables.
 603  *
 604  * The function traverses through all the allocated BSS priority nodes
 605  * in every BSS priority table and frees them.
 606  */
 607 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 608 {
 609         int i;
 610         struct mwifiex_adapter *adapter = priv->adapter;
 611         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node, **cur;
 612         struct list_head *head;
 613         spinlock_t *lock; /* bss priority lock */
 614         unsigned long flags;
 615
 616         for (i = 0; i < adapter->priv_num; ++i) {
 617                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 618                 cur = &adapter->bss_prio_tbl[i].bss_prio_cur;
 619                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 620                 dev_dbg(adapter->dev, "info: delete BSS priority table,"
 621                                 " bss_type = %d, bss_num = %d, i = %d,"
 622                                 " head = %p, cur = %p\n",
 623                               priv->bss_type, priv->bss_num, i, head, *cur);
 624                 if (*cur) {
 625                         spin_lock_irqsave(lock, flags);
 626                         if (list_empty(head)) {
 627                                 spin_unlock_irqrestore(lock, flags);
 628                                 continue;
 629                         }
 630                         bssprio_node = list_first_entry(head,
 631                                         struct mwifiex_bss_prio_node, list);
 632                         spin_unlock_irqrestore(lock, flags);
 633
 634                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 635                                                  list) {
 636                                 if (bssprio_node->priv == priv) {
 637                                         dev_dbg(adapter->dev, "info: Delete "
 638                                                 "node %p, next = %p\n",
 639                                                 bssprio_node, tmp_node);
 640                                         spin_lock_irqsave(lock, flags);
 641                                         list_del(&bssprio_node->list);
 642                                         spin_unlock_irqrestore(lock, flags);
 643                                         kfree(bssprio_node);
 644                                 }
 645                         }
 646                         *cur = (struct mwifiex_bss_prio_node *)head;
 647                 }
 648         }
 649 }
 650
 651 /*
 652  * This function frees the private structure, including cleans
 653  * up the TX and RX queues and frees the BSS priority tables.
 654  */
 655 void mwifiex_free_priv(struct mwifiex_private *priv)
 656 {
 657         mwifiex_clean_txrx(priv);
 658         mwifiex_delete_bss_prio_tbl(priv);
 659         mwifiex_free_curr_bcn(priv);
 660 }
 661
 662 /*
 663  * This function is used to shutdown the driver.
 664  *
 665  * The following operations are performed sequentially -
 666  *      - Check if already shut down
 667  *      - Make sure the main process has stopped
 668  *      - Clean up the Tx and Rx queues
 669  *      - Delete BSS priority tables
 670  *      - Free the adapter
 671  *      - Notify completion
 672  */
 673 int
 674 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 675 {
 676         int ret = -EINPROGRESS;
 677         struct mwifiex_private *priv;
 678         s32 i;
 679         unsigned long flags;
 680         struct sk_buff *skb;
 681
 682         /* mwifiex already shutdown */
 683         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 684                 return 0;
 685
 686         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 687         /* wait for mwifiex_process to complete */
 688         if (adapter->mwifiex_processing) {
 689                 dev_warn(adapter->dev, "main process is still running\n");
 690                 return ret;
 691         }
 692
 693         /* shut down mwifiex */
 694         dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");
 695
 696         /* Clean up Tx/Rx queues and delete BSS priority table */
 697         for (i = 0; i < adapter->priv_num; i++) {
 698                 if (adapter->priv[i]) {
 699                         priv = adapter->priv[i];
 700
 701                         mwifiex_clean_txrx(priv);
 702                         mwifiex_delete_bss_prio_tbl(priv);
 703                 }
 704         }
 705
 706         spin_lock_irqsave(&adapter->mwifiex_lock, flags);
 707
 708         if (adapter->if_ops.data_complete) {
 709                 while ((skb = skb_dequeue(&adapter->usb_rx_data_q))) {
 710                         struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 711
 712                         priv = adapter->priv[rx_info->bss_num];
 713                         if (priv)
 714                                 priv->stats.rx_dropped++;
 715
 716                         adapter->if_ops.data_complete(adapter, skb);
 717                 }
 718         }
 719
 720         /* Free adapter structure */
 721         mwifiex_free_adapter(adapter);
 722
 723         spin_unlock_irqrestore(&adapter->mwifiex_lock, flags);
 724
 725         /* Notify completion */
 726         ret = mwifiex_shutdown_fw_complete(adapter);
 727
 728         return ret;
 729 }
 730
 731 /*
 732  * This function downloads the firmware to the card.
 733  *
 734  * The actual download is preceded by two sanity checks -
 735  *      - Check if firmware is already running
 736  *      - Check if the interface is the winner to download the firmware
 737  *
 738  * ...and followed by another -
 739  *      - Check if the firmware is downloaded successfully
 740  *
 741  * After download is successfully completed, the host interrupts are enabled.
 742  */
 743 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 744                     struct mwifiex_fw_image *pmfw)
 745 {
 746         int ret;
 747         u32 poll_num = 1;
 748
 749         if (adapter->if_ops.check_fw_status) {
 750                 adapter->winner = 0;
 751
 752                 /* check if firmware is already running */
 753                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 754                 if (!ret) {
 755                         dev_notice(adapter->dev,
 756                                    "WLAN FW already running! Skip FW dnld\n");
 757                         goto done;
 758                 }
 759
 760                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 761
 762                 /* check if we are the winner for downloading FW */
 763                 if (!adapter->winner) {
 764                         dev_notice(adapter->dev,
 765                                    "FW already running! Skip FW dnld\n");
 766                         poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
 767                         goto poll_fw;
 768                 }
 769         }
 770
 771         if (pmfw) {
 772                 /* Download firmware with helper */
 773                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 774                 if (ret) {
 775                         dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
 776                         return ret;
 777                 }
 778         }
 779
 780 poll_fw:
 781         /* Check if the firmware is downloaded successfully or not */
 782         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 783         if (ret) {
 784                 dev_err(adapter->dev, "FW failed to be active in time\n");
 785                 return -1;
 786         }
 787 done:
 788         /* re-enable host interrupt for mwifiex after fw dnld is successful */
 789         if (adapter->if_ops.enable_int)
 790                 adapter->if_ops.enable_int(adapter);
 791
 792         return ret;
 793 }