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

   1 /*
   2  * Marvell Wireless LAN device driver: HW/FW Initialization
   3  *
   4  * Copyright (C) 2011-2014, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27
  28 /*
  29  * This function adds a BSS priority table to the table list.
  30  *
  31  * The function allocates a new BSS priority table node and adds it to
  32  * the end of BSS priority table list, kept in driver memory.
  33  */
  34 static int mwifiex_add_bss_prio_tbl(struct mwifiex_private *priv)
  35 {
  36         struct mwifiex_adapter *adapter = priv->adapter;
  37         struct mwifiex_bss_prio_node *bss_prio;
  38         struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
  39         unsigned long flags;
  40
  41         bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
  42         if (!bss_prio)
  43                 return -ENOMEM;
  44
  45         bss_prio->priv = priv;
  46         INIT_LIST_HEAD(&bss_prio->list);
  47
  48         spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags);
  49         list_add_tail(&bss_prio->list, &tbl[priv->bss_priority].bss_prio_head);
  50         spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags);
  51
  52         return 0;
  53 }
  54
  55 static void wakeup_timer_fn(unsigned long data)
  56 {
  57         struct mwifiex_adapter *adapter = (struct mwifiex_adapter *)data;
  58
  59         mwifiex_dbg(adapter, ERROR, "Firmware wakeup failed\n");
  60         adapter->hw_status = MWIFIEX_HW_STATUS_RESET;
  61         mwifiex_cancel_all_pending_cmd(adapter);
  62
  63         if (adapter->if_ops.card_reset && !adapter->hs_activated)
  64                 adapter->if_ops.card_reset(adapter);
  65 }
  66
  67 /*
  68  * This function initializes the private structure and sets default
  69  * values to the members.
  70  *
  71  * Additionally, it also initializes all the locks and sets up all the
  72  * lists.
  73  */
  74 int mwifiex_init_priv(struct mwifiex_private *priv)
  75 {
  76         u32 i;
  77
  78         priv->media_connected = false;
  79         eth_broadcast_addr(priv->curr_addr);
  80         priv->port_open = false;
  81         priv->usb_port = MWIFIEX_USB_EP_DATA;
  82         priv->pkt_tx_ctrl = 0;
  83         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
  84         priv->data_rate = 0;    /* Initially indicate the rate as auto */
  85         priv->is_data_rate_auto = true;
  86         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
  87         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
  88
  89         priv->sec_info.wep_enabled = 0;
  90         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
  91         priv->sec_info.encryption_mode = 0;
  92         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
  93                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
  94         priv->wep_key_curr_index = 0;
  95         priv->curr_pkt_filter = HostCmd_ACT_MAC_DYNAMIC_BW_ENABLE |
  96                                 HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
  97                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
  98
  99         priv->beacon_period = 100; /* beacon interval */
 100         priv->attempted_bss_desc = NULL;
 101         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 102         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 103
 104         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 105         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 106         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 107         priv->assoc_rsp_size = 0;
 108         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 109         priv->atim_window = 0;
 110         priv->adhoc_state = ADHOC_IDLE;
 111         priv->tx_power_level = 0;
 112         priv->max_tx_power_level = 0;
 113         priv->min_tx_power_level = 0;
 114         priv->tx_ant = 0;
 115         priv->rx_ant = 0;
 116         priv->tx_rate = 0;
 117         priv->rxpd_htinfo = 0;
 118         priv->rxpd_rate = 0;
 119         priv->rate_bitmap = 0;
 120         priv->data_rssi_last = 0;
 121         priv->data_rssi_avg = 0;
 122         priv->data_nf_avg = 0;
 123         priv->data_nf_last = 0;
 124         priv->bcn_rssi_last = 0;
 125         priv->bcn_rssi_avg = 0;
 126         priv->bcn_nf_avg = 0;
 127         priv->bcn_nf_last = 0;
 128         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 129         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 130         priv->wpa_ie_len = 0;
 131         priv->wpa_is_gtk_set = false;
 132
 133         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 134         priv->assoc_tlv_buf_len = 0;
 135         memset(&priv->wps, 0, sizeof(priv->wps));
 136         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 137         priv->gen_ie_buf_len = 0;
 138         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 139
 140         priv->wmm_required = true;
 141         priv->wmm_enabled = false;
 142         priv->wmm_qosinfo = 0;
 143         priv->curr_bcn_buf = NULL;
 144         priv->curr_bcn_size = 0;
 145         priv->wps_ie = NULL;
 146         priv->wps_ie_len = 0;
 147         priv->ap_11n_enabled = 0;
 148         memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg));
 149
 150         priv->scan_block = false;
 151
 152         priv->csa_chan = 0;
 153         priv->csa_expire_time = 0;
 154         priv->del_list_idx = 0;
 155         priv->hs2_enabled = false;
 156         priv->check_tdls_tx = false;
 157         memcpy(priv->tos_to_tid_inv, tos_to_tid_inv, MAX_NUM_TID);
 158
 159         mwifiex_init_11h_params(priv);
 160
 161         return mwifiex_add_bss_prio_tbl(priv);
 162 }
 163
 164 /*
 165  * This function allocates buffers for members of the adapter
 166  * structure.
 167  *
 168  * The memory allocated includes scan table, command buffers, and
 169  * sleep confirm command buffer. In addition, the queues are
 170  * also initialized.
 171  */
 172 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 173 {
 174         int ret;
 175
 176         /* Allocate command buffer */
 177         ret = mwifiex_alloc_cmd_buffer(adapter);
 178         if (ret) {
 179                 mwifiex_dbg(adapter, ERROR,
 180                             "%s: failed to alloc cmd buffer\n",
 181                             __func__);
 182                 return -1;
 183         }
 184
 185         adapter->sleep_cfm =
 186                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 187                               + INTF_HEADER_LEN);
 188
 189         if (!adapter->sleep_cfm) {
 190                 mwifiex_dbg(adapter, ERROR,
 191                             "%s: failed to alloc sleep cfm\t"
 192                             " cmd buffer\n", __func__);
 193                 return -1;
 194         }
 195         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 196
 197         return 0;
 198 }
 199
 200 /*
 201  * This function initializes the adapter structure and sets default
 202  * values to the members of adapter.
 203  *
 204  * This also initializes the WMM related parameters in the driver private
 205  * structures.
 206  */
 207 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 208 {
 209         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 210
 211         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 212
 213         adapter->cmd_sent = false;
 214
 215         if (adapter->iface_type == MWIFIEX_SDIO)
 216                 adapter->data_sent = true;
 217         else
 218                 adapter->data_sent = false;
 219
 220         if (adapter->iface_type == MWIFIEX_USB)
 221                 adapter->intf_hdr_len = 0;
 222         else
 223                 adapter->intf_hdr_len = INTF_HEADER_LEN;
 224
 225         adapter->cmd_resp_received = false;
 226         adapter->event_received = false;
 227         adapter->data_received = false;
 228
 229         adapter->surprise_removed = false;
 230
 231         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 232
 233         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 234         adapter->ps_state = PS_STATE_AWAKE;
 235         adapter->need_to_wakeup = false;
 236
 237         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 238         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 239         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 240         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 241         adapter->scan_chan_gap_time = MWIFIEX_DEF_SCAN_CHAN_GAP_TIME;
 242
 243         adapter->scan_probes = 1;
 244
 245         adapter->multiple_dtim = 1;
 246
 247         adapter->local_listen_interval = 0;     /* default value in firmware
 248                                                    will be used */
 249
 250         adapter->is_deep_sleep = false;
 251
 252         adapter->delay_null_pkt = false;
 253         adapter->delay_to_ps = 1000;
 254         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 255
 256         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 257                                            default */
 258         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 259                                            default */
 260         adapter->pm_wakeup_card_req = false;
 261
 262         adapter->pm_wakeup_fw_try = false;
 263
 264         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 265
 266         adapter->is_hs_configured = false;
 267         adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF);
 268         adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF;
 269         adapter->hs_cfg.gap = HS_CFG_GAP_DEF;
 270         adapter->hs_activated = false;
 271
 272         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 273         adapter->hw_dot_11n_dev_cap = 0;
 274         adapter->hw_dev_mcs_support = 0;
 275         adapter->sec_chan_offset = 0;
 276         adapter->adhoc_11n_enabled = false;
 277
 278         mwifiex_wmm_init(adapter);
 279         atomic_set(&adapter->tx_hw_pending, 0);
 280
 281         sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 282                                         adapter->sleep_cfm->data;
 283         memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 284         sleep_cfm_buf->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 285         sleep_cfm_buf->size = cpu_to_le16(adapter->sleep_cfm->len);
 286         sleep_cfm_buf->result = 0;
 287         sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 288         sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 289
 290         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 291         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 292         adapter->tx_lock_flag = false;
 293         adapter->null_pkt_interval = 0;
 294         adapter->fw_bands = 0;
 295         adapter->config_bands = 0;
 296         adapter->adhoc_start_band = 0;
 297         adapter->scan_channels = NULL;
 298         adapter->fw_release_number = 0;
 299         adapter->fw_cap_info = 0;
 300         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 301         adapter->event_cause = 0;
 302         adapter->region_code = 0;
 303         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 304         adapter->adhoc_awake_period = 0;
 305         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 306         adapter->arp_filter_size = 0;
 307         adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
 308         adapter->mfg_mode = mfg_mode;
 309         adapter->key_api_major_ver = 0;
 310         adapter->key_api_minor_ver = 0;
 311         eth_broadcast_addr(adapter->perm_addr);
 312         adapter->iface_limit.sta_intf = MWIFIEX_MAX_STA_NUM;
 313         adapter->iface_limit.uap_intf = MWIFIEX_MAX_UAP_NUM;
 314         adapter->iface_limit.p2p_intf = MWIFIEX_MAX_P2P_NUM;
 315         adapter->active_scan_triggered = false;
 316         setup_timer(&adapter->wakeup_timer, wakeup_timer_fn,
 317                     (unsigned long)adapter);
 318 }
 319
 320 /*
 321  * This function sets trans_start per tx_queue
 322  */
 323 void mwifiex_set_trans_start(struct net_device *dev)
 324 {
 325         int i;
 326
 327         for (i = 0; i < dev->num_tx_queues; i++)
 328                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 329
 330         netif_trans_update(dev);
 331 }
 332
 333 /*
 334  * This function wakes up all queues in net_device
 335  */
 336 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 337                                         struct mwifiex_adapter *adapter)
 338 {
 339         unsigned long dev_queue_flags;
 340
 341         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 342         netif_tx_wake_all_queues(netdev);
 343         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 344 }
 345
 346 /*
 347  * This function stops all queues in net_device
 348  */
 349 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 350                                         struct mwifiex_adapter *adapter)
 351 {
 352         unsigned long dev_queue_flags;
 353
 354         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 355         netif_tx_stop_all_queues(netdev);
 356         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 357 }
 358
 359 /*
 360  * This function invalidates the list heads.
 361  */
 362 static void mwifiex_invalidate_lists(struct mwifiex_adapter *adapter)
 363 {
 364         struct mwifiex_private *priv;
 365         s32 i, j;
 366
 367         list_del(&adapter->cmd_free_q);
 368         list_del(&adapter->cmd_pending_q);
 369         list_del(&adapter->scan_pending_q);
 370
 371         for (i = 0; i < adapter->priv_num; i++)
 372                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 373
 374         for (i = 0; i < adapter->priv_num; i++) {
 375                 if (adapter->priv[i]) {
 376                         priv = adapter->priv[i];
 377                         for (j = 0; j < MAX_NUM_TID; ++j)
 378                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 379                         list_del(&priv->tx_ba_stream_tbl_ptr);
 380                         list_del(&priv->rx_reorder_tbl_ptr);
 381                         list_del(&priv->sta_list);
 382                         list_del(&priv->auto_tdls_list);
 383                 }
 384         }
 385 }
 386
 387 /*
 388  * This function performs cleanup for adapter structure.
 389  *
 390  * The cleanup is done recursively, by canceling all pending
 391  * commands, freeing the member buffers previously allocated
 392  * (command buffers, scan table buffer, sleep confirm command
 393  * buffer), stopping the timers and calling the cleanup routines
 394  * for every interface.
 395  */
 396 static void
 397 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
 398 {
 399         del_timer(&adapter->wakeup_timer);
 400         mwifiex_cancel_all_pending_cmd(adapter);
 401         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 402         wake_up_interruptible(&adapter->hs_activate_wait_q);
 403 }
 404
 405 void mwifiex_free_cmd_buffers(struct mwifiex_adapter *adapter)
 406 {
 407         mwifiex_invalidate_lists(adapter);
 408
 409         /* Free command buffer */
 410         mwifiex_dbg(adapter, INFO, "info: free cmd buffer\n");
 411         mwifiex_free_cmd_buffer(adapter);
 412
 413         if (adapter->sleep_cfm)
 414                 dev_kfree_skb_any(adapter->sleep_cfm);
 415 }
 416
 417 /*
 418  *  This function intializes the lock variables and
 419  *  the list heads.
 420  */
 421 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 422 {
 423         struct mwifiex_private *priv;
 424         s32 i, j;
 425
 426         spin_lock_init(&adapter->int_lock);
 427         spin_lock_init(&adapter->main_proc_lock);
 428         spin_lock_init(&adapter->mwifiex_cmd_lock);
 429         spin_lock_init(&adapter->queue_lock);
 430         for (i = 0; i < adapter->priv_num; i++) {
 431                 if (adapter->priv[i]) {
 432                         priv = adapter->priv[i];
 433                         spin_lock_init(&priv->rx_pkt_lock);
 434                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 435                         spin_lock_init(&priv->curr_bcn_buf_lock);
 436                         spin_lock_init(&priv->sta_list_spinlock);
 437                         spin_lock_init(&priv->auto_tdls_lock);
 438                 }
 439         }
 440
 441         /* Initialize cmd_free_q */
 442         INIT_LIST_HEAD(&adapter->cmd_free_q);
 443         /* Initialize cmd_pending_q */
 444         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 445         /* Initialize scan_pending_q */
 446         INIT_LIST_HEAD(&adapter->scan_pending_q);
 447
 448         spin_lock_init(&adapter->cmd_free_q_lock);
 449         spin_lock_init(&adapter->cmd_pending_q_lock);
 450         spin_lock_init(&adapter->scan_pending_q_lock);
 451         spin_lock_init(&adapter->rx_proc_lock);
 452
 453         skb_queue_head_init(&adapter->rx_data_q);
 454         skb_queue_head_init(&adapter->tx_data_q);
 455
 456         for (i = 0; i < adapter->priv_num; ++i) {
 457                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 458                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 459         }
 460
 461         for (i = 0; i < adapter->priv_num; i++) {
 462                 if (!adapter->priv[i])
 463                         continue;
 464                 priv = adapter->priv[i];
 465                 for (j = 0; j < MAX_NUM_TID; ++j)
 466                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 467                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 468                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 469                 INIT_LIST_HEAD(&priv->sta_list);
 470                 INIT_LIST_HEAD(&priv->auto_tdls_list);
 471                 skb_queue_head_init(&priv->tdls_txq);
 472                 skb_queue_head_init(&priv->bypass_txq);
 473
 474                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 475                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 476
 477                 spin_lock_init(&priv->ack_status_lock);
 478                 idr_init(&priv->ack_status_frames);
 479         }
 480
 481         return 0;
 482 }
 483
 484 /*
 485  * This function initializes the firmware.
 486  *
 487  * The following operations are performed sequentially -
 488  *      - Allocate adapter structure
 489  *      - Initialize the adapter structure
 490  *      - Initialize the private structure
 491  *      - Add BSS priority tables to the adapter structure
 492  *      - For each interface, send the init commands to firmware
 493  *      - Send the first command in command pending queue, if available
 494  */
 495 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 496 {
 497         int ret;
 498         struct mwifiex_private *priv;
 499         u8 i, first_sta = true;
 500         int is_cmd_pend_q_empty;
 501         unsigned long flags;
 502
 503         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 504
 505         /* Allocate memory for member of adapter structure */
 506         ret = mwifiex_allocate_adapter(adapter);
 507         if (ret)
 508                 return -1;
 509
 510         /* Initialize adapter structure */
 511         mwifiex_init_adapter(adapter);
 512
 513         for (i = 0; i < adapter->priv_num; i++) {
 514                 if (adapter->priv[i]) {
 515                         priv = adapter->priv[i];
 516
 517                         /* Initialize private structure */
 518                         ret = mwifiex_init_priv(priv);
 519                         if (ret)
 520                                 return -1;
 521                 }
 522         }
 523         if (adapter->mfg_mode) {
 524                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 525                 ret = -EINPROGRESS;
 526         } else {
 527                 for (i = 0; i < adapter->priv_num; i++) {
 528                         if (adapter->priv[i]) {
 529                                 ret = mwifiex_sta_init_cmd(adapter->priv[i],
 530                                                            first_sta, true);
 531                                 if (ret == -1)
 532                                         return -1;
 533
 534                                 first_sta = false;
 535                         }
 536
 537
 538
 539                 }
 540         }
 541
 542         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 543         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 544         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 545         if (!is_cmd_pend_q_empty) {
 546                 /* Send the first command in queue and return */
 547                 if (mwifiex_main_process(adapter) != -1)
 548                         ret = -EINPROGRESS;
 549         } else {
 550                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 551         }
 552
 553         return ret;
 554 }
 555
 556 /*
 557  * This function deletes the BSS priority tables.
 558  *
 559  * The function traverses through all the allocated BSS priority nodes
 560  * in every BSS priority table and frees them.
 561  */
 562 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 563 {
 564         int i;
 565         struct mwifiex_adapter *adapter = priv->adapter;
 566         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
 567         struct list_head *head;
 568         spinlock_t *lock; /* bss priority lock */
 569         unsigned long flags;
 570
 571         for (i = 0; i < adapter->priv_num; ++i) {
 572                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 573                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 574                 mwifiex_dbg(adapter, INFO,
 575                             "info: delete BSS priority table,\t"
 576                             "bss_type = %d, bss_num = %d, i = %d,\t"
 577                             "head = %p\n",
 578                             priv->bss_type, priv->bss_num, i, head);
 579
 580                 {
 581                         spin_lock_irqsave(lock, flags);
 582                         if (list_empty(head)) {
 583                                 spin_unlock_irqrestore(lock, flags);
 584                                 continue;
 585                         }
 586                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 587                                                  list) {
 588                                 if (bssprio_node->priv == priv) {
 589                                         mwifiex_dbg(adapter, INFO,
 590                                                     "info: Delete\t"
 591                                                     "node %p, next = %p\n",
 592                                                     bssprio_node, tmp_node);
 593                                         list_del(&bssprio_node->list);
 594                                         kfree(bssprio_node);
 595                                 }
 596                         }
 597                         spin_unlock_irqrestore(lock, flags);
 598                 }
 599         }
 600 }
 601
 602 /*
 603  * This function frees the private structure, including cleans
 604  * up the TX and RX queues and frees the BSS priority tables.
 605  */
 606 void mwifiex_free_priv(struct mwifiex_private *priv)
 607 {
 608         mwifiex_clean_txrx(priv);
 609         mwifiex_delete_bss_prio_tbl(priv);
 610         mwifiex_free_curr_bcn(priv);
 611 }
 612
 613 /*
 614  * This function is used to shutdown the driver.
 615  *
 616  * The following operations are performed sequentially -
 617  *      - Check if already shut down
 618  *      - Make sure the main process has stopped
 619  *      - Clean up the Tx and Rx queues
 620  *      - Delete BSS priority tables
 621  *      - Free the adapter
 622  *      - Notify completion
 623  */
 624 void
 625 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 626 {
 627         struct mwifiex_private *priv;
 628         s32 i;
 629         unsigned long flags;
 630         struct sk_buff *skb;
 631
 632         /* mwifiex already shutdown */
 633         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 634                 return;
 635
 636         /* cancel current command */
 637         if (adapter->curr_cmd) {
 638                 mwifiex_dbg(adapter, WARN,
 639                             "curr_cmd is still in processing\n");
 640                 del_timer_sync(&adapter->cmd_timer);
 641                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 642                 adapter->curr_cmd = NULL;
 643         }
 644
 645         /* shut down mwifiex */
 646         mwifiex_dbg(adapter, MSG,
 647                     "info: shutdown mwifiex...\n");
 648
 649         /* Clean up Tx/Rx queues and delete BSS priority table */
 650         for (i = 0; i < adapter->priv_num; i++) {
 651                 if (adapter->priv[i]) {
 652                         priv = adapter->priv[i];
 653
 654                         mwifiex_clean_auto_tdls(priv);
 655                         mwifiex_abort_cac(priv);
 656                         mwifiex_free_priv(priv);
 657                 }
 658         }
 659
 660         atomic_set(&adapter->tx_queued, 0);
 661         while ((skb = skb_dequeue(&adapter->tx_data_q)))
 662                 mwifiex_write_data_complete(adapter, skb, 0, 0);
 663
 664         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 665
 666         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 667                 struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 668
 669                 atomic_dec(&adapter->rx_pending);
 670                 priv = adapter->priv[rx_info->bss_num];
 671                 if (priv)
 672                         priv->stats.rx_dropped++;
 673
 674                 dev_kfree_skb_any(skb);
 675         }
 676
 677         spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 678
 679         mwifiex_adapter_cleanup(adapter);
 680
 681         adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY;
 682 }
 683
 684 /*
 685  * This function downloads the firmware to the card.
 686  *
 687  * The actual download is preceded by two sanity checks -
 688  *      - Check if firmware is already running
 689  *      - Check if the interface is the winner to download the firmware
 690  *
 691  * ...and followed by another -
 692  *      - Check if the firmware is downloaded successfully
 693  *
 694  * After download is successfully completed, the host interrupts are enabled.
 695  */
 696 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 697                     struct mwifiex_fw_image *pmfw)
 698 {
 699         int ret;
 700         u32 poll_num = 1;
 701
 702         if (adapter->if_ops.check_fw_status) {
 703                 /* check if firmware is already running */
 704                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 705                 if (!ret) {
 706                         mwifiex_dbg(adapter, MSG,
 707                                     "WLAN FW already running! Skip FW dnld\n");
 708                         return 0;
 709                 }
 710         }
 711
 712         /* check if we are the winner for downloading FW */
 713         if (adapter->if_ops.check_winner_status) {
 714                 adapter->winner = 0;
 715                 ret = adapter->if_ops.check_winner_status(adapter);
 716
 717                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 718                 if (ret) {
 719                         mwifiex_dbg(adapter, MSG,
 720                                     "WLAN read winner status failed!\n");
 721                         return ret;
 722                 }
 723
 724                 if (!adapter->winner) {
 725                         mwifiex_dbg(adapter, MSG,
 726                                     "WLAN is not the winner! Skip FW dnld\n");
 727                         goto poll_fw;
 728                 }
 729         }
 730
 731         if (pmfw) {
 732                 /* Download firmware with helper */
 733                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 734                 if (ret) {
 735                         mwifiex_dbg(adapter, ERROR,
 736                                     "prog_fw failed ret=%#x\n", ret);
 737                         return ret;
 738                 }
 739         }
 740
 741 poll_fw:
 742         /* Check if the firmware is downloaded successfully or not */
 743         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 744         if (ret)
 745                 mwifiex_dbg(adapter, ERROR,
 746                             "FW failed to be active in time\n");
 747
 748         return ret;
 749 }
 750 EXPORT_SYMBOL_GPL(mwifiex_dnld_fw);