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