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(struct timer_list *t)
  56 {
  57         struct mwifiex_adapter *adapter = from_timer(adapter, t, wakeup_timer);
  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         timer_setup(&adapter->wakeup_timer, wakeup_timer_fn, 0);
 317 }
 318
 319 /*
 320  * This function sets trans_start per tx_queue
 321  */
 322 void mwifiex_set_trans_start(struct net_device *dev)
 323 {
 324         int i;
 325
 326         for (i = 0; i < dev->num_tx_queues; i++)
 327                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 328
 329         netif_trans_update(dev);
 330 }
 331
 332 /*
 333  * This function wakes up all queues in net_device
 334  */
 335 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 336                                         struct mwifiex_adapter *adapter)
 337 {
 338         unsigned long dev_queue_flags;
 339
 340         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 341         netif_tx_wake_all_queues(netdev);
 342         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 343 }
 344
 345 /*
 346  * This function stops all queues in net_device
 347  */
 348 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 349                                         struct mwifiex_adapter *adapter)
 350 {
 351         unsigned long dev_queue_flags;
 352
 353         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 354         netif_tx_stop_all_queues(netdev);
 355         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 356 }
 357
 358 /*
 359  * This function invalidates the list heads.
 360  */
 361 static void mwifiex_invalidate_lists(struct mwifiex_adapter *adapter)
 362 {
 363         struct mwifiex_private *priv;
 364         s32 i, j;
 365
 366         list_del(&adapter->cmd_free_q);
 367         list_del(&adapter->cmd_pending_q);
 368         list_del(&adapter->scan_pending_q);
 369
 370         for (i = 0; i < adapter->priv_num; i++)
 371                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 372
 373         for (i = 0; i < adapter->priv_num; i++) {
 374                 if (adapter->priv[i]) {
 375                         priv = adapter->priv[i];
 376                         for (j = 0; j < MAX_NUM_TID; ++j)
 377                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 378                         list_del(&priv->tx_ba_stream_tbl_ptr);
 379                         list_del(&priv->rx_reorder_tbl_ptr);
 380                         list_del(&priv->sta_list);
 381                         list_del(&priv->auto_tdls_list);
 382                 }
 383         }
 384 }
 385
 386 /*
 387  * This function performs cleanup for adapter structure.
 388  *
 389  * The cleanup is done recursively, by canceling all pending
 390  * commands, freeing the member buffers previously allocated
 391  * (command buffers, scan table buffer, sleep confirm command
 392  * buffer), stopping the timers and calling the cleanup routines
 393  * for every interface.
 394  */
 395 static void
 396 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
 397 {
 398         del_timer(&adapter->wakeup_timer);
 399         mwifiex_cancel_all_pending_cmd(adapter);
 400         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 401         wake_up_interruptible(&adapter->hs_activate_wait_q);
 402 }
 403
 404 void mwifiex_free_cmd_buffers(struct mwifiex_adapter *adapter)
 405 {
 406         mwifiex_invalidate_lists(adapter);
 407
 408         /* Free command buffer */
 409         mwifiex_dbg(adapter, INFO, "info: free cmd buffer\n");
 410         mwifiex_free_cmd_buffer(adapter);
 411
 412         if (adapter->sleep_cfm)
 413                 dev_kfree_skb_any(adapter->sleep_cfm);
 414 }
 415
 416 /*
 417  *  This function intializes the lock variables and
 418  *  the list heads.
 419  */
 420 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 421 {
 422         struct mwifiex_private *priv;
 423         s32 i, j;
 424
 425         spin_lock_init(&adapter->int_lock);
 426         spin_lock_init(&adapter->main_proc_lock);
 427         spin_lock_init(&adapter->mwifiex_cmd_lock);
 428         spin_lock_init(&adapter->queue_lock);
 429         for (i = 0; i < adapter->priv_num; i++) {
 430                 if (adapter->priv[i]) {
 431                         priv = adapter->priv[i];
 432                         spin_lock_init(&priv->rx_pkt_lock);
 433                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 434                         spin_lock_init(&priv->curr_bcn_buf_lock);
 435                         spin_lock_init(&priv->sta_list_spinlock);
 436                         spin_lock_init(&priv->auto_tdls_lock);
 437                 }
 438         }
 439
 440         /* Initialize cmd_free_q */
 441         INIT_LIST_HEAD(&adapter->cmd_free_q);
 442         /* Initialize cmd_pending_q */
 443         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 444         /* Initialize scan_pending_q */
 445         INIT_LIST_HEAD(&adapter->scan_pending_q);
 446
 447         spin_lock_init(&adapter->cmd_free_q_lock);
 448         spin_lock_init(&adapter->cmd_pending_q_lock);
 449         spin_lock_init(&adapter->scan_pending_q_lock);
 450         spin_lock_init(&adapter->rx_proc_lock);
 451
 452         skb_queue_head_init(&adapter->rx_data_q);
 453         skb_queue_head_init(&adapter->tx_data_q);
 454
 455         for (i = 0; i < adapter->priv_num; ++i) {
 456                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 457                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 458         }
 459
 460         for (i = 0; i < adapter->priv_num; i++) {
 461                 if (!adapter->priv[i])
 462                         continue;
 463                 priv = adapter->priv[i];
 464                 for (j = 0; j < MAX_NUM_TID; ++j)
 465                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 466                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 467                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 468                 INIT_LIST_HEAD(&priv->sta_list);
 469                 INIT_LIST_HEAD(&priv->auto_tdls_list);
 470                 skb_queue_head_init(&priv->tdls_txq);
 471                 skb_queue_head_init(&priv->bypass_txq);
 472
 473                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 474                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 475
 476                 spin_lock_init(&priv->ack_status_lock);
 477                 idr_init(&priv->ack_status_frames);
 478         }
 479
 480         return 0;
 481 }
 482
 483 /*
 484  * This function initializes the firmware.
 485  *
 486  * The following operations are performed sequentially -
 487  *      - Allocate adapter structure
 488  *      - Initialize the adapter structure
 489  *      - Initialize the private structure
 490  *      - Add BSS priority tables to the adapter structure
 491  *      - For each interface, send the init commands to firmware
 492  *      - Send the first command in command pending queue, if available
 493  */
 494 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 495 {
 496         int ret;
 497         struct mwifiex_private *priv;
 498         u8 i, first_sta = true;
 499         int is_cmd_pend_q_empty;
 500         unsigned long flags;
 501
 502         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 503
 504         /* Allocate memory for member of adapter structure */
 505         ret = mwifiex_allocate_adapter(adapter);
 506         if (ret)
 507                 return -1;
 508
 509         /* Initialize adapter structure */
 510         mwifiex_init_adapter(adapter);
 511
 512         for (i = 0; i < adapter->priv_num; i++) {
 513                 if (adapter->priv[i]) {
 514                         priv = adapter->priv[i];
 515
 516                         /* Initialize private structure */
 517                         ret = mwifiex_init_priv(priv);
 518                         if (ret)
 519                                 return -1;
 520                 }
 521         }
 522         if (adapter->mfg_mode) {
 523                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 524                 ret = -EINPROGRESS;
 525         } else {
 526                 for (i = 0; i < adapter->priv_num; i++) {
 527                         if (adapter->priv[i]) {
 528                                 ret = mwifiex_sta_init_cmd(adapter->priv[i],
 529                                                            first_sta, true);
 530                                 if (ret == -1)
 531                                         return -1;
 532
 533                                 first_sta = false;
 534                         }
 535
 536
 537
 538                 }
 539         }
 540
 541         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 542         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 543         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 544         if (!is_cmd_pend_q_empty) {
 545                 /* Send the first command in queue and return */
 546                 if (mwifiex_main_process(adapter) != -1)
 547                         ret = -EINPROGRESS;
 548         } else {
 549                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 550         }
 551
 552         return ret;
 553 }
 554
 555 /*
 556  * This function deletes the BSS priority tables.
 557  *
 558  * The function traverses through all the allocated BSS priority nodes
 559  * in every BSS priority table and frees them.
 560  */
 561 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 562 {
 563         int i;
 564         struct mwifiex_adapter *adapter = priv->adapter;
 565         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
 566         struct list_head *head;
 567         spinlock_t *lock; /* bss priority lock */
 568         unsigned long flags;
 569
 570         for (i = 0; i < adapter->priv_num; ++i) {
 571                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 572                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 573                 mwifiex_dbg(adapter, INFO,
 574                             "info: delete BSS priority table,\t"
 575                             "bss_type = %d, bss_num = %d, i = %d,\t"
 576                             "head = %p\n",
 577                             priv->bss_type, priv->bss_num, i, head);
 578
 579                 {
 580                         spin_lock_irqsave(lock, flags);
 581                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 582                                                  list) {
 583                                 if (bssprio_node->priv == priv) {
 584                                         mwifiex_dbg(adapter, INFO,
 585                                                     "info: Delete\t"
 586                                                     "node %p, next = %p\n",
 587                                                     bssprio_node, tmp_node);
 588                                         list_del(&bssprio_node->list);
 589                                         kfree(bssprio_node);
 590                                 }
 591                         }
 592                         spin_unlock_irqrestore(lock, flags);
 593                 }
 594         }
 595 }
 596
 597 /*
 598  * This function frees the private structure, including cleans
 599  * up the TX and RX queues and frees the BSS priority tables.
 600  */
 601 void mwifiex_free_priv(struct mwifiex_private *priv)
 602 {
 603         mwifiex_clean_txrx(priv);
 604         mwifiex_delete_bss_prio_tbl(priv);
 605         mwifiex_free_curr_bcn(priv);
 606 }
 607
 608 /*
 609  * This function is used to shutdown the driver.
 610  *
 611  * The following operations are performed sequentially -
 612  *      - Check if already shut down
 613  *      - Make sure the main process has stopped
 614  *      - Clean up the Tx and Rx queues
 615  *      - Delete BSS priority tables
 616  *      - Free the adapter
 617  *      - Notify completion
 618  */
 619 void
 620 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 621 {
 622         struct mwifiex_private *priv;
 623         s32 i;
 624         unsigned long flags;
 625         struct sk_buff *skb;
 626
 627         /* mwifiex already shutdown */
 628         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 629                 return;
 630
 631         /* cancel current command */
 632         if (adapter->curr_cmd) {
 633                 mwifiex_dbg(adapter, WARN,
 634                             "curr_cmd is still in processing\n");
 635                 del_timer_sync(&adapter->cmd_timer);
 636                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 637                 adapter->curr_cmd = NULL;
 638         }
 639
 640         /* shut down mwifiex */
 641         mwifiex_dbg(adapter, MSG,
 642                     "info: shutdown mwifiex...\n");
 643
 644         /* Clean up Tx/Rx queues and delete BSS priority table */
 645         for (i = 0; i < adapter->priv_num; i++) {
 646                 if (adapter->priv[i]) {
 647                         priv = adapter->priv[i];
 648
 649                         mwifiex_clean_auto_tdls(priv);
 650                         mwifiex_abort_cac(priv);
 651                         mwifiex_free_priv(priv);
 652                 }
 653         }
 654
 655         atomic_set(&adapter->tx_queued, 0);
 656         while ((skb = skb_dequeue(&adapter->tx_data_q)))
 657                 mwifiex_write_data_complete(adapter, skb, 0, 0);
 658
 659         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 660
 661         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 662                 struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 663
 664                 atomic_dec(&adapter->rx_pending);
 665                 priv = adapter->priv[rx_info->bss_num];
 666                 if (priv)
 667                         priv->stats.rx_dropped++;
 668
 669                 dev_kfree_skb_any(skb);
 670         }
 671
 672         spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 673
 674         mwifiex_adapter_cleanup(adapter);
 675
 676         adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY;
 677 }
 678
 679 /*
 680  * This function downloads the firmware to the card.
 681  *
 682  * The actual download is preceded by two sanity checks -
 683  *      - Check if firmware is already running
 684  *      - Check if the interface is the winner to download the firmware
 685  *
 686  * ...and followed by another -
 687  *      - Check if the firmware is downloaded successfully
 688  *
 689  * After download is successfully completed, the host interrupts are enabled.
 690  */
 691 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 692                     struct mwifiex_fw_image *pmfw)
 693 {
 694         int ret;
 695         u32 poll_num = 1;
 696
 697         if (adapter->if_ops.check_fw_status) {
 698                 /* check if firmware is already running */
 699                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 700                 if (!ret) {
 701                         mwifiex_dbg(adapter, MSG,
 702                                     "WLAN FW already running! Skip FW dnld\n");
 703                         return 0;
 704                 }
 705         }
 706
 707         /* check if we are the winner for downloading FW */
 708         if (adapter->if_ops.check_winner_status) {
 709                 adapter->winner = 0;
 710                 ret = adapter->if_ops.check_winner_status(adapter);
 711
 712                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 713                 if (ret) {
 714                         mwifiex_dbg(adapter, MSG,
 715                                     "WLAN read winner status failed!\n");
 716                         return ret;
 717                 }
 718
 719                 if (!adapter->winner) {
 720                         mwifiex_dbg(adapter, MSG,
 721                                     "WLAN is not the winner! Skip FW dnld\n");
 722                         goto poll_fw;
 723                 }
 724         }
 725
 726         if (pmfw) {
 727                 /* Download firmware with helper */
 728                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 729                 if (ret) {
 730                         mwifiex_dbg(adapter, ERROR,
 731                                     "prog_fw failed ret=%#x\n", ret);
 732                         return ret;
 733                 }
 734         }
 735
 736 poll_fw:
 737         /* Check if the firmware is downloaded successfully or not */
 738         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 739         if (ret)
 740                 mwifiex_dbg(adapter, ERROR,
 741                             "FW failed to be active in time\n");
 742
 743         return ret;
 744 }
 745 EXPORT_SYMBOL_GPL(mwifiex_dnld_fw);