drivers/net/wireless/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)
  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->pkt_tx_ctrl = 0;
  82         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
  83         priv->data_rate = 0;    /* Initially indicate the rate as auto */
  84         priv->is_data_rate_auto = true;
  85         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
  86         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
  87
  88         priv->sec_info.wep_enabled = 0;
  89         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
  90         priv->sec_info.encryption_mode = 0;
  91         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
  92                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
  93         priv->wep_key_curr_index = 0;
  94         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
  95                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
  96
  97         priv->beacon_period = 100; /* beacon interval */ ;
  98         priv->attempted_bss_desc = NULL;
  99         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 100         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 101
 102         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 103         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 104         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 105         priv->assoc_rsp_size = 0;
 106         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 107         priv->atim_window = 0;
 108         priv->adhoc_state = ADHOC_IDLE;
 109         priv->tx_power_level = 0;
 110         priv->max_tx_power_level = 0;
 111         priv->min_tx_power_level = 0;
 112         priv->tx_rate = 0;
 113         priv->rxpd_htinfo = 0;
 114         priv->rxpd_rate = 0;
 115         priv->rate_bitmap = 0;
 116         priv->data_rssi_last = 0;
 117         priv->data_rssi_avg = 0;
 118         priv->data_nf_avg = 0;
 119         priv->data_nf_last = 0;
 120         priv->bcn_rssi_last = 0;
 121         priv->bcn_rssi_avg = 0;
 122         priv->bcn_nf_avg = 0;
 123         priv->bcn_nf_last = 0;
 124         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 125         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 126         priv->wpa_ie_len = 0;
 127         priv->wpa_is_gtk_set = false;
 128
 129         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 130         priv->assoc_tlv_buf_len = 0;
 131         memset(&priv->wps, 0, sizeof(priv->wps));
 132         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 133         priv->gen_ie_buf_len = 0;
 134         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 135
 136         priv->wmm_required = true;
 137         priv->wmm_enabled = false;
 138         priv->wmm_qosinfo = 0;
 139         priv->curr_bcn_buf = NULL;
 140         priv->curr_bcn_size = 0;
 141         priv->wps_ie = NULL;
 142         priv->wps_ie_len = 0;
 143         priv->ap_11n_enabled = 0;
 144         memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg));
 145
 146         priv->scan_block = false;
 147
 148         priv->csa_chan = 0;
 149         priv->csa_expire_time = 0;
 150         priv->del_list_idx = 0;
 151         priv->hs2_enabled = false;
 152         priv->check_tdls_tx = false;
 153         memcpy(priv->tos_to_tid_inv, tos_to_tid_inv, MAX_NUM_TID);
 154
 155         mwifiex_init_11h_params(priv);
 156
 157         return mwifiex_add_bss_prio_tbl(priv);
 158 }
 159
 160 /*
 161  * This function allocates buffers for members of the adapter
 162  * structure.
 163  *
 164  * The memory allocated includes scan table, command buffers, and
 165  * sleep confirm command buffer. In addition, the queues are
 166  * also initialized.
 167  */
 168 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 169 {
 170         int ret;
 171
 172         /* Allocate command buffer */
 173         ret = mwifiex_alloc_cmd_buffer(adapter);
 174         if (ret) {
 175                 mwifiex_dbg(adapter, ERROR,
 176                             "%s: failed to alloc cmd buffer\n",
 177                             __func__);
 178                 return -1;
 179         }
 180
 181         adapter->sleep_cfm =
 182                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 183                               + INTF_HEADER_LEN);
 184
 185         if (!adapter->sleep_cfm) {
 186                 mwifiex_dbg(adapter, ERROR,
 187                             "%s: failed to alloc sleep cfm\t"
 188                             " cmd buffer\n", __func__);
 189                 return -1;
 190         }
 191         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 192
 193         return 0;
 194 }
 195
 196 /*
 197  * This function initializes the adapter structure and sets default
 198  * values to the members of adapter.
 199  *
 200  * This also initializes the WMM related parameters in the driver private
 201  * structures.
 202  */
 203 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 204 {
 205         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 206
 207         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 208
 209         adapter->cmd_sent = false;
 210
 211         if (adapter->iface_type == MWIFIEX_SDIO)
 212                 adapter->data_sent = true;
 213         else
 214                 adapter->data_sent = false;
 215
 216         adapter->cmd_resp_received = false;
 217         adapter->event_received = false;
 218         adapter->data_received = false;
 219
 220         adapter->surprise_removed = false;
 221
 222         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 223
 224         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 225         adapter->ps_state = PS_STATE_AWAKE;
 226         adapter->need_to_wakeup = false;
 227
 228         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 229         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 230         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 231         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 232         adapter->scan_chan_gap_time = MWIFIEX_DEF_SCAN_CHAN_GAP_TIME;
 233
 234         adapter->scan_probes = 1;
 235
 236         adapter->multiple_dtim = 1;
 237
 238         adapter->local_listen_interval = 0;     /* default value in firmware
 239                                                    will be used */
 240
 241         adapter->is_deep_sleep = false;
 242
 243         adapter->delay_null_pkt = false;
 244         adapter->delay_to_ps = 1000;
 245         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 246
 247         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 248                                            default */
 249         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 250                                            default */
 251         adapter->pm_wakeup_card_req = false;
 252
 253         adapter->pm_wakeup_fw_try = false;
 254
 255         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 256
 257         adapter->is_hs_configured = false;
 258         adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF);
 259         adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF;
 260         adapter->hs_cfg.gap = HS_CFG_GAP_DEF;
 261         adapter->hs_activated = false;
 262
 263         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 264         adapter->hw_dot_11n_dev_cap = 0;
 265         adapter->hw_dev_mcs_support = 0;
 266         adapter->sec_chan_offset = 0;
 267         adapter->adhoc_11n_enabled = false;
 268
 269         mwifiex_wmm_init(adapter);
 270
 271         sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 272                                         adapter->sleep_cfm->data;
 273         memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 274         sleep_cfm_buf->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 275         sleep_cfm_buf->size = cpu_to_le16(adapter->sleep_cfm->len);
 276         sleep_cfm_buf->result = 0;
 277         sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 278         sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 279
 280         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 281         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 282         adapter->tx_lock_flag = false;
 283         adapter->null_pkt_interval = 0;
 284         adapter->fw_bands = 0;
 285         adapter->config_bands = 0;
 286         adapter->adhoc_start_band = 0;
 287         adapter->scan_channels = NULL;
 288         adapter->fw_release_number = 0;
 289         adapter->fw_cap_info = 0;
 290         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 291         adapter->event_cause = 0;
 292         adapter->region_code = 0;
 293         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 294         adapter->adhoc_awake_period = 0;
 295         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 296         adapter->arp_filter_size = 0;
 297         adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
 298         adapter->key_api_major_ver = 0;
 299         adapter->key_api_minor_ver = 0;
 300         eth_broadcast_addr(adapter->perm_addr);
 301         adapter->iface_limit.sta_intf = MWIFIEX_MAX_STA_NUM;
 302         adapter->iface_limit.uap_intf = MWIFIEX_MAX_UAP_NUM;
 303         adapter->iface_limit.p2p_intf = MWIFIEX_MAX_P2P_NUM;
 304
 305         setup_timer(&adapter->wakeup_timer, wakeup_timer_fn,
 306                     (unsigned long)adapter);
 307 }
 308
 309 /*
 310  * This function sets trans_start per tx_queue
 311  */
 312 void mwifiex_set_trans_start(struct net_device *dev)
 313 {
 314         int i;
 315
 316         for (i = 0; i < dev->num_tx_queues; i++)
 317                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 318
 319         dev->trans_start = jiffies;
 320 }
 321
 322 /*
 323  * This function wakes up all queues in net_device
 324  */
 325 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 326                                         struct mwifiex_adapter *adapter)
 327 {
 328         unsigned long dev_queue_flags;
 329         unsigned int i;
 330
 331         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 332
 333         for (i = 0; i < netdev->num_tx_queues; i++) {
 334                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 335
 336                 if (netif_tx_queue_stopped(txq))
 337                         netif_tx_wake_queue(txq);
 338         }
 339
 340         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 341 }
 342
 343 /*
 344  * This function stops all queues in net_device
 345  */
 346 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 347                                         struct mwifiex_adapter *adapter)
 348 {
 349         unsigned long dev_queue_flags;
 350         unsigned int i;
 351
 352         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 353
 354         for (i = 0; i < netdev->num_tx_queues; i++) {
 355                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 356
 357                 if (!netif_tx_queue_stopped(txq))
 358                         netif_tx_stop_queue(txq);
 359         }
 360
 361         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 362 }
 363
 364 /*
 365  *  This function releases the lock variables and frees the locks and
 366  *  associated locks.
 367  */
 368 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 369 {
 370         struct mwifiex_private *priv;
 371         s32 i, j;
 372
 373         /* Free lists */
 374         list_del(&adapter->cmd_free_q);
 375         list_del(&adapter->cmd_pending_q);
 376         list_del(&adapter->scan_pending_q);
 377
 378         for (i = 0; i < adapter->priv_num; i++)
 379                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 380
 381         for (i = 0; i < adapter->priv_num; i++) {
 382                 if (adapter->priv[i]) {
 383                         priv = adapter->priv[i];
 384                         for (j = 0; j < MAX_NUM_TID; ++j)
 385                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 386                         list_del(&priv->tx_ba_stream_tbl_ptr);
 387                         list_del(&priv->rx_reorder_tbl_ptr);
 388                         list_del(&priv->sta_list);
 389                         list_del(&priv->auto_tdls_list);
 390                 }
 391         }
 392 }
 393
 394 /*
 395  * This function performs cleanup for adapter structure.
 396  *
 397  * The cleanup is done recursively, by canceling all pending
 398  * commands, freeing the member buffers previously allocated
 399  * (command buffers, scan table buffer, sleep confirm command
 400  * buffer), stopping the timers and calling the cleanup routines
 401  * for every interface.
 402  */
 403 static void
 404 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
 405 {
 406         int idx;
 407
 408         if (!adapter) {
 409                 pr_err("%s: adapter is NULL\n", __func__);
 410                 return;
 411         }
 412
 413         del_timer(&adapter->wakeup_timer);
 414         mwifiex_cancel_all_pending_cmd(adapter);
 415         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 416         wake_up_interruptible(&adapter->hs_activate_wait_q);
 417
 418         /* Free lock variables */
 419         mwifiex_free_lock_list(adapter);
 420
 421         /* Free command buffer */
 422         mwifiex_dbg(adapter, INFO, "info: free cmd buffer\n");
 423         mwifiex_free_cmd_buffer(adapter);
 424
 425         for (idx = 0; idx < adapter->num_mem_types; idx++) {
 426                 struct memory_type_mapping *entry =
 427                                 &adapter->mem_type_mapping_tbl[idx];
 428
 429                 if (entry->mem_ptr) {
 430                         vfree(entry->mem_ptr);
 431                         entry->mem_ptr = NULL;
 432                 }
 433                 entry->mem_size = 0;
 434         }
 435
 436         if (adapter->drv_info_dump) {
 437                 vfree(adapter->drv_info_dump);
 438                 adapter->drv_info_dump = NULL;
 439                 adapter->drv_info_size = 0;
 440         }
 441
 442         if (adapter->sleep_cfm)
 443                 dev_kfree_skb_any(adapter->sleep_cfm);
 444 }
 445
 446 /*
 447  *  This function intializes the lock variables and
 448  *  the list heads.
 449  */
 450 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 451 {
 452         struct mwifiex_private *priv;
 453         s32 i, j;
 454
 455         spin_lock_init(&adapter->mwifiex_lock);
 456         spin_lock_init(&adapter->int_lock);
 457         spin_lock_init(&adapter->main_proc_lock);
 458         spin_lock_init(&adapter->mwifiex_cmd_lock);
 459         spin_lock_init(&adapter->queue_lock);
 460         for (i = 0; i < adapter->priv_num; i++) {
 461                 if (adapter->priv[i]) {
 462                         priv = adapter->priv[i];
 463                         spin_lock_init(&priv->rx_pkt_lock);
 464                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 465                         spin_lock_init(&priv->curr_bcn_buf_lock);
 466                         spin_lock_init(&priv->sta_list_spinlock);
 467                         spin_lock_init(&priv->auto_tdls_lock);
 468                 }
 469         }
 470
 471         /* Initialize cmd_free_q */
 472         INIT_LIST_HEAD(&adapter->cmd_free_q);
 473         /* Initialize cmd_pending_q */
 474         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 475         /* Initialize scan_pending_q */
 476         INIT_LIST_HEAD(&adapter->scan_pending_q);
 477
 478         spin_lock_init(&adapter->cmd_free_q_lock);
 479         spin_lock_init(&adapter->cmd_pending_q_lock);
 480         spin_lock_init(&adapter->scan_pending_q_lock);
 481         spin_lock_init(&adapter->rx_proc_lock);
 482
 483         skb_queue_head_init(&adapter->rx_data_q);
 484         skb_queue_head_init(&adapter->tx_data_q);
 485
 486         for (i = 0; i < adapter->priv_num; ++i) {
 487                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 488                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 489         }
 490
 491         for (i = 0; i < adapter->priv_num; i++) {
 492                 if (!adapter->priv[i])
 493                         continue;
 494                 priv = adapter->priv[i];
 495                 for (j = 0; j < MAX_NUM_TID; ++j)
 496                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 497                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 498                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 499                 INIT_LIST_HEAD(&priv->sta_list);
 500                 INIT_LIST_HEAD(&priv->auto_tdls_list);
 501                 skb_queue_head_init(&priv->tdls_txq);
 502                 skb_queue_head_init(&priv->bypass_txq);
 503
 504                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 505                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 506
 507                 spin_lock_init(&priv->ack_status_lock);
 508                 idr_init(&priv->ack_status_frames);
 509         }
 510
 511         return 0;
 512 }
 513
 514 /*
 515  * This function initializes the firmware.
 516  *
 517  * The following operations are performed sequentially -
 518  *      - Allocate adapter structure
 519  *      - Initialize the adapter structure
 520  *      - Initialize the private structure
 521  *      - Add BSS priority tables to the adapter structure
 522  *      - For each interface, send the init commands to firmware
 523  *      - Send the first command in command pending queue, if available
 524  */
 525 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 526 {
 527         int ret;
 528         struct mwifiex_private *priv;
 529         u8 i, first_sta = true;
 530         int is_cmd_pend_q_empty;
 531         unsigned long flags;
 532
 533         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 534
 535         /* Allocate memory for member of adapter structure */
 536         ret = mwifiex_allocate_adapter(adapter);
 537         if (ret)
 538                 return -1;
 539
 540         /* Initialize adapter structure */
 541         mwifiex_init_adapter(adapter);
 542
 543         for (i = 0; i < adapter->priv_num; i++) {
 544                 if (adapter->priv[i]) {
 545                         priv = adapter->priv[i];
 546
 547                         /* Initialize private structure */
 548                         ret = mwifiex_init_priv(priv);
 549                         if (ret)
 550                                 return -1;
 551                 }
 552         }
 553
 554         for (i = 0; i < adapter->priv_num; i++) {
 555                 if (adapter->priv[i]) {
 556                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta,
 557                                                    true);
 558                         if (ret == -1)
 559                                 return -1;
 560
 561                         first_sta = false;
 562                 }
 563         }
 564
 565         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 566         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 567         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 568         if (!is_cmd_pend_q_empty) {
 569                 /* Send the first command in queue and return */
 570                 if (mwifiex_main_process(adapter) != -1)
 571                         ret = -EINPROGRESS;
 572         } else {
 573                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 574         }
 575
 576         return ret;
 577 }
 578
 579 /*
 580  * This function deletes the BSS priority tables.
 581  *
 582  * The function traverses through all the allocated BSS priority nodes
 583  * in every BSS priority table and frees them.
 584  */
 585 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 586 {
 587         int i;
 588         struct mwifiex_adapter *adapter = priv->adapter;
 589         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
 590         struct list_head *head;
 591         spinlock_t *lock; /* bss priority lock */
 592         unsigned long flags;
 593
 594         for (i = 0; i < adapter->priv_num; ++i) {
 595                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 596                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 597                 mwifiex_dbg(adapter, INFO,
 598                             "info: delete BSS priority table,\t"
 599                             "bss_type = %d, bss_num = %d, i = %d,\t"
 600                             "head = %p\n",
 601                             priv->bss_type, priv->bss_num, i, head);
 602
 603                 {
 604                         spin_lock_irqsave(lock, flags);
 605                         if (list_empty(head)) {
 606                                 spin_unlock_irqrestore(lock, flags);
 607                                 continue;
 608                         }
 609                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 610                                                  list) {
 611                                 if (bssprio_node->priv == priv) {
 612                                         mwifiex_dbg(adapter, INFO,
 613                                                     "info: Delete\t"
 614                                                     "node %p, next = %p\n",
 615                                                     bssprio_node, tmp_node);
 616                                         list_del(&bssprio_node->list);
 617                                         kfree(bssprio_node);
 618                                 }
 619                         }
 620                         spin_unlock_irqrestore(lock, flags);
 621                 }
 622         }
 623 }
 624
 625 /*
 626  * This function frees the private structure, including cleans
 627  * up the TX and RX queues and frees the BSS priority tables.
 628  */
 629 void mwifiex_free_priv(struct mwifiex_private *priv)
 630 {
 631         mwifiex_clean_txrx(priv);
 632         mwifiex_delete_bss_prio_tbl(priv);
 633         mwifiex_free_curr_bcn(priv);
 634 }
 635
 636 /*
 637  * This function is used to shutdown the driver.
 638  *
 639  * The following operations are performed sequentially -
 640  *      - Check if already shut down
 641  *      - Make sure the main process has stopped
 642  *      - Clean up the Tx and Rx queues
 643  *      - Delete BSS priority tables
 644  *      - Free the adapter
 645  *      - Notify completion
 646  */
 647 int
 648 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 649 {
 650         int ret = -EINPROGRESS;
 651         struct mwifiex_private *priv;
 652         s32 i;
 653         unsigned long flags;
 654         struct sk_buff *skb;
 655
 656         /* mwifiex already shutdown */
 657         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 658                 return 0;
 659
 660         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 661         /* wait for mwifiex_process to complete */
 662         if (adapter->mwifiex_processing) {
 663                 mwifiex_dbg(adapter, WARN,
 664                             "main process is still running\n");
 665                 return ret;
 666         }
 667
 668         /* cancel current command */
 669         if (adapter->curr_cmd) {
 670                 mwifiex_dbg(adapter, WARN,
 671                             "curr_cmd is still in processing\n");
 672                 del_timer_sync(&adapter->cmd_timer);
 673                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 674                 adapter->curr_cmd = NULL;
 675         }
 676
 677         /* shut down mwifiex */
 678         mwifiex_dbg(adapter, MSG,
 679                     "info: shutdown mwifiex...\n");
 680
 681         /* Clean up Tx/Rx queues and delete BSS priority table */
 682         for (i = 0; i < adapter->priv_num; i++) {
 683                 if (adapter->priv[i]) {
 684                         priv = adapter->priv[i];
 685
 686                         mwifiex_clean_auto_tdls(priv);
 687                         mwifiex_abort_cac(priv);
 688                         mwifiex_clean_txrx(priv);
 689                         mwifiex_delete_bss_prio_tbl(priv);
 690                 }
 691         }
 692
 693         atomic_set(&adapter->tx_queued, 0);
 694         while ((skb = skb_dequeue(&adapter->tx_data_q)))
 695                 mwifiex_write_data_complete(adapter, skb, 0, 0);
 696
 697         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 698
 699         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 700                 struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 701
 702                 atomic_dec(&adapter->rx_pending);
 703                 priv = adapter->priv[rx_info->bss_num];
 704                 if (priv)
 705                         priv->stats.rx_dropped++;
 706
 707                 dev_kfree_skb_any(skb);
 708         }
 709
 710         spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 711
 712         spin_lock(&adapter->mwifiex_lock);
 713
 714         mwifiex_adapter_cleanup(adapter);
 715
 716         spin_unlock(&adapter->mwifiex_lock);
 717
 718         /* Notify completion */
 719         ret = mwifiex_shutdown_fw_complete(adapter);
 720
 721         return ret;
 722 }
 723
 724 /*
 725  * This function downloads the firmware to the card.
 726  *
 727  * The actual download is preceded by two sanity checks -
 728  *      - Check if firmware is already running
 729  *      - Check if the interface is the winner to download the firmware
 730  *
 731  * ...and followed by another -
 732  *      - Check if the firmware is downloaded successfully
 733  *
 734  * After download is successfully completed, the host interrupts are enabled.
 735  */
 736 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 737                     struct mwifiex_fw_image *pmfw)
 738 {
 739         int ret;
 740         u32 poll_num = 1;
 741
 742         if (adapter->if_ops.check_fw_status) {
 743                 adapter->winner = 0;
 744
 745                 /* check if firmware is already running */
 746                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 747                 if (!ret) {
 748                         mwifiex_dbg(adapter, MSG,
 749                                     "WLAN FW already running! Skip FW dnld\n");
 750                         return 0;
 751                 }
 752
 753                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 754
 755                 /* check if we are the winner for downloading FW */
 756                 if (!adapter->winner) {
 757                         mwifiex_dbg(adapter, MSG,
 758                                     "FW already running! Skip FW dnld\n");
 759                         goto poll_fw;
 760                 }
 761         }
 762
 763         if (pmfw) {
 764                 /* Download firmware with helper */
 765                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 766                 if (ret) {
 767                         mwifiex_dbg(adapter, ERROR,
 768                                     "prog_fw failed ret=%#x\n", ret);
 769                         return ret;
 770                 }
 771         }
 772
 773 poll_fw:
 774         /* Check if the firmware is downloaded successfully or not */
 775         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 776         if (ret)
 777                 mwifiex_dbg(adapter, ERROR,
 778                             "FW failed to be active in time\n");
 779
 780         return ret;
 781 }