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_RX_ON | HostCmd_ACT_MAC_TX_ON |
  96                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
  97
  98         priv->beacon_period = 100; /* beacon interval */
  99         priv->attempted_bss_desc = NULL;
 100         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 101         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 102
 103         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 104         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 105         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 106         priv->assoc_rsp_size = 0;
 107         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 108         priv->atim_window = 0;
 109         priv->adhoc_state = ADHOC_IDLE;
 110         priv->tx_power_level = 0;
 111         priv->max_tx_power_level = 0;
 112         priv->min_tx_power_level = 0;
 113         priv->tx_ant = 0;
 114         priv->rx_ant = 0;
 115         priv->tx_rate = 0;
 116         priv->rxpd_htinfo = 0;
 117         priv->rxpd_rate = 0;
 118         priv->rate_bitmap = 0;
 119         priv->data_rssi_last = 0;
 120         priv->data_rssi_avg = 0;
 121         priv->data_nf_avg = 0;
 122         priv->data_nf_last = 0;
 123         priv->bcn_rssi_last = 0;
 124         priv->bcn_rssi_avg = 0;
 125         priv->bcn_nf_avg = 0;
 126         priv->bcn_nf_last = 0;
 127         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 128         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 129         priv->wpa_ie_len = 0;
 130         priv->wpa_is_gtk_set = false;
 131
 132         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 133         priv->assoc_tlv_buf_len = 0;
 134         memset(&priv->wps, 0, sizeof(priv->wps));
 135         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 136         priv->gen_ie_buf_len = 0;
 137         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 138
 139         priv->wmm_required = true;
 140         priv->wmm_enabled = false;
 141         priv->wmm_qosinfo = 0;
 142         priv->curr_bcn_buf = NULL;
 143         priv->curr_bcn_size = 0;
 144         priv->wps_ie = NULL;
 145         priv->wps_ie_len = 0;
 146         priv->ap_11n_enabled = 0;
 147         memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg));
 148
 149         priv->scan_block = false;
 150
 151         priv->csa_chan = 0;
 152         priv->csa_expire_time = 0;
 153         priv->del_list_idx = 0;
 154         priv->hs2_enabled = false;
 155         priv->check_tdls_tx = false;
 156         memcpy(priv->tos_to_tid_inv, tos_to_tid_inv, MAX_NUM_TID);
 157
 158         mwifiex_init_11h_params(priv);
 159
 160         return mwifiex_add_bss_prio_tbl(priv);
 161 }
 162
 163 /*
 164  * This function allocates buffers for members of the adapter
 165  * structure.
 166  *
 167  * The memory allocated includes scan table, command buffers, and
 168  * sleep confirm command buffer. In addition, the queues are
 169  * also initialized.
 170  */
 171 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 172 {
 173         int ret;
 174
 175         /* Allocate command buffer */
 176         ret = mwifiex_alloc_cmd_buffer(adapter);
 177         if (ret) {
 178                 mwifiex_dbg(adapter, ERROR,
 179                             "%s: failed to alloc cmd buffer\n",
 180                             __func__);
 181                 return -1;
 182         }
 183
 184         adapter->sleep_cfm =
 185                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 186                               + INTF_HEADER_LEN);
 187
 188         if (!adapter->sleep_cfm) {
 189                 mwifiex_dbg(adapter, ERROR,
 190                             "%s: failed to alloc sleep cfm\t"
 191                             " cmd buffer\n", __func__);
 192                 return -1;
 193         }
 194         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 195
 196         return 0;
 197 }
 198
 199 /*
 200  * This function initializes the adapter structure and sets default
 201  * values to the members of adapter.
 202  *
 203  * This also initializes the WMM related parameters in the driver private
 204  * structures.
 205  */
 206 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 207 {
 208         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 209
 210         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 211
 212         adapter->cmd_sent = false;
 213
 214         if (adapter->iface_type == MWIFIEX_SDIO)
 215                 adapter->data_sent = true;
 216         else
 217                 adapter->data_sent = false;
 218
 219         adapter->cmd_resp_received = false;
 220         adapter->event_received = false;
 221         adapter->data_received = false;
 222
 223         adapter->surprise_removed = false;
 224
 225         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 226
 227         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 228         adapter->ps_state = PS_STATE_AWAKE;
 229         adapter->need_to_wakeup = false;
 230
 231         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 232         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 233         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 234         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 235         adapter->scan_chan_gap_time = MWIFIEX_DEF_SCAN_CHAN_GAP_TIME;
 236
 237         adapter->scan_probes = 1;
 238
 239         adapter->multiple_dtim = 1;
 240
 241         adapter->local_listen_interval = 0;     /* default value in firmware
 242                                                    will be used */
 243
 244         adapter->is_deep_sleep = false;
 245
 246         adapter->delay_null_pkt = false;
 247         adapter->delay_to_ps = 1000;
 248         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 249
 250         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 251                                            default */
 252         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 253                                            default */
 254         adapter->pm_wakeup_card_req = false;
 255
 256         adapter->pm_wakeup_fw_try = false;
 257
 258         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 259
 260         adapter->is_hs_configured = false;
 261         adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF);
 262         adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF;
 263         adapter->hs_cfg.gap = HS_CFG_GAP_DEF;
 264         adapter->hs_activated = false;
 265
 266         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 267         adapter->hw_dot_11n_dev_cap = 0;
 268         adapter->hw_dev_mcs_support = 0;
 269         adapter->sec_chan_offset = 0;
 270         adapter->adhoc_11n_enabled = false;
 271
 272         mwifiex_wmm_init(adapter);
 273
 274         sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 275                                         adapter->sleep_cfm->data;
 276         memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 277         sleep_cfm_buf->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 278         sleep_cfm_buf->size = cpu_to_le16(adapter->sleep_cfm->len);
 279         sleep_cfm_buf->result = 0;
 280         sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 281         sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 282
 283         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 284         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 285         adapter->tx_lock_flag = false;
 286         adapter->null_pkt_interval = 0;
 287         adapter->fw_bands = 0;
 288         adapter->config_bands = 0;
 289         adapter->adhoc_start_band = 0;
 290         adapter->scan_channels = NULL;
 291         adapter->fw_release_number = 0;
 292         adapter->fw_cap_info = 0;
 293         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 294         adapter->event_cause = 0;
 295         adapter->region_code = 0;
 296         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 297         adapter->adhoc_awake_period = 0;
 298         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 299         adapter->arp_filter_size = 0;
 300         adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
 301         adapter->mfg_mode = mfg_mode;
 302         adapter->key_api_major_ver = 0;
 303         adapter->key_api_minor_ver = 0;
 304         eth_broadcast_addr(adapter->perm_addr);
 305         adapter->iface_limit.sta_intf = MWIFIEX_MAX_STA_NUM;
 306         adapter->iface_limit.uap_intf = MWIFIEX_MAX_UAP_NUM;
 307         adapter->iface_limit.p2p_intf = MWIFIEX_MAX_P2P_NUM;
 308         adapter->active_scan_triggered = false;
 309         setup_timer(&adapter->wakeup_timer, wakeup_timer_fn,
 310                     (unsigned long)adapter);
 311 }
 312
 313 /*
 314  * This function sets trans_start per tx_queue
 315  */
 316 void mwifiex_set_trans_start(struct net_device *dev)
 317 {
 318         int i;
 319
 320         for (i = 0; i < dev->num_tx_queues; i++)
 321                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 322
 323         netif_trans_update(dev);
 324 }
 325
 326 /*
 327  * This function wakes up all queues in net_device
 328  */
 329 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 330                                         struct mwifiex_adapter *adapter)
 331 {
 332         unsigned long dev_queue_flags;
 333         unsigned int i;
 334
 335         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 336
 337         for (i = 0; i < netdev->num_tx_queues; i++) {
 338                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 339
 340                 if (netif_tx_queue_stopped(txq))
 341                         netif_tx_wake_queue(txq);
 342         }
 343
 344         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 345 }
 346
 347 /*
 348  * This function stops all queues in net_device
 349  */
 350 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 351                                         struct mwifiex_adapter *adapter)
 352 {
 353         unsigned long dev_queue_flags;
 354         unsigned int i;
 355
 356         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 357
 358         for (i = 0; i < netdev->num_tx_queues; i++) {
 359                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 360
 361                 if (!netif_tx_queue_stopped(txq))
 362                         netif_tx_stop_queue(txq);
 363         }
 364
 365         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 366 }
 367
 368 /*
 369  *  This function releases the lock variables and frees the locks and
 370  *  associated locks.
 371  */
 372 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 373 {
 374         struct mwifiex_private *priv;
 375         s32 i, j;
 376
 377         /* Free lists */
 378         list_del(&adapter->cmd_free_q);
 379         list_del(&adapter->cmd_pending_q);
 380         list_del(&adapter->scan_pending_q);
 381
 382         for (i = 0; i < adapter->priv_num; i++)
 383                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 384
 385         for (i = 0; i < adapter->priv_num; i++) {
 386                 if (adapter->priv[i]) {
 387                         priv = adapter->priv[i];
 388                         for (j = 0; j < MAX_NUM_TID; ++j)
 389                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 390                         list_del(&priv->tx_ba_stream_tbl_ptr);
 391                         list_del(&priv->rx_reorder_tbl_ptr);
 392                         list_del(&priv->sta_list);
 393                         list_del(&priv->auto_tdls_list);
 394                 }
 395         }
 396 }
 397
 398 /*
 399  * This function performs cleanup for adapter structure.
 400  *
 401  * The cleanup is done recursively, by canceling all pending
 402  * commands, freeing the member buffers previously allocated
 403  * (command buffers, scan table buffer, sleep confirm command
 404  * buffer), stopping the timers and calling the cleanup routines
 405  * for every interface.
 406  */
 407 static void
 408 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
 409 {
 410         int idx;
 411
 412         if (!adapter) {
 413                 pr_err("%s: adapter is NULL\n", __func__);
 414                 return;
 415         }
 416
 417         del_timer(&adapter->wakeup_timer);
 418         mwifiex_cancel_all_pending_cmd(adapter);
 419         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 420         wake_up_interruptible(&adapter->hs_activate_wait_q);
 421
 422         /* Free lock variables */
 423         mwifiex_free_lock_list(adapter);
 424
 425         /* Free command buffer */
 426         mwifiex_dbg(adapter, INFO, "info: free cmd buffer\n");
 427         mwifiex_free_cmd_buffer(adapter);
 428
 429         for (idx = 0; idx < adapter->num_mem_types; idx++) {
 430                 struct memory_type_mapping *entry =
 431                                 &adapter->mem_type_mapping_tbl[idx];
 432
 433                 if (entry->mem_ptr) {
 434                         vfree(entry->mem_ptr);
 435                         entry->mem_ptr = NULL;
 436                 }
 437                 entry->mem_size = 0;
 438         }
 439
 440         if (adapter->drv_info_dump) {
 441                 vfree(adapter->drv_info_dump);
 442                 adapter->drv_info_dump = NULL;
 443                 adapter->drv_info_size = 0;
 444         }
 445
 446         if (adapter->sleep_cfm)
 447                 dev_kfree_skb_any(adapter->sleep_cfm);
 448 }
 449
 450 /*
 451  *  This function intializes the lock variables and
 452  *  the list heads.
 453  */
 454 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 455 {
 456         struct mwifiex_private *priv;
 457         s32 i, j;
 458
 459         spin_lock_init(&adapter->mwifiex_lock);
 460         spin_lock_init(&adapter->int_lock);
 461         spin_lock_init(&adapter->main_proc_lock);
 462         spin_lock_init(&adapter->mwifiex_cmd_lock);
 463         spin_lock_init(&adapter->queue_lock);
 464         for (i = 0; i < adapter->priv_num; i++) {
 465                 if (adapter->priv[i]) {
 466                         priv = adapter->priv[i];
 467                         spin_lock_init(&priv->rx_pkt_lock);
 468                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 469                         spin_lock_init(&priv->curr_bcn_buf_lock);
 470                         spin_lock_init(&priv->sta_list_spinlock);
 471                         spin_lock_init(&priv->auto_tdls_lock);
 472                 }
 473         }
 474
 475         /* Initialize cmd_free_q */
 476         INIT_LIST_HEAD(&adapter->cmd_free_q);
 477         /* Initialize cmd_pending_q */
 478         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 479         /* Initialize scan_pending_q */
 480         INIT_LIST_HEAD(&adapter->scan_pending_q);
 481
 482         spin_lock_init(&adapter->cmd_free_q_lock);
 483         spin_lock_init(&adapter->cmd_pending_q_lock);
 484         spin_lock_init(&adapter->scan_pending_q_lock);
 485         spin_lock_init(&adapter->rx_proc_lock);
 486
 487         skb_queue_head_init(&adapter->rx_data_q);
 488         skb_queue_head_init(&adapter->tx_data_q);
 489
 490         for (i = 0; i < adapter->priv_num; ++i) {
 491                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 492                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 493         }
 494
 495         for (i = 0; i < adapter->priv_num; i++) {
 496                 if (!adapter->priv[i])
 497                         continue;
 498                 priv = adapter->priv[i];
 499                 for (j = 0; j < MAX_NUM_TID; ++j)
 500                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 501                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 502                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 503                 INIT_LIST_HEAD(&priv->sta_list);
 504                 INIT_LIST_HEAD(&priv->auto_tdls_list);
 505                 skb_queue_head_init(&priv->tdls_txq);
 506                 skb_queue_head_init(&priv->bypass_txq);
 507
 508                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 509                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 510
 511                 spin_lock_init(&priv->ack_status_lock);
 512                 idr_init(&priv->ack_status_frames);
 513         }
 514
 515         return 0;
 516 }
 517
 518 /*
 519  * This function initializes the firmware.
 520  *
 521  * The following operations are performed sequentially -
 522  *      - Allocate adapter structure
 523  *      - Initialize the adapter structure
 524  *      - Initialize the private structure
 525  *      - Add BSS priority tables to the adapter structure
 526  *      - For each interface, send the init commands to firmware
 527  *      - Send the first command in command pending queue, if available
 528  */
 529 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 530 {
 531         int ret;
 532         struct mwifiex_private *priv;
 533         u8 i, first_sta = true;
 534         int is_cmd_pend_q_empty;
 535         unsigned long flags;
 536
 537         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 538
 539         /* Allocate memory for member of adapter structure */
 540         ret = mwifiex_allocate_adapter(adapter);
 541         if (ret)
 542                 return -1;
 543
 544         /* Initialize adapter structure */
 545         mwifiex_init_adapter(adapter);
 546
 547         for (i = 0; i < adapter->priv_num; i++) {
 548                 if (adapter->priv[i]) {
 549                         priv = adapter->priv[i];
 550
 551                         /* Initialize private structure */
 552                         ret = mwifiex_init_priv(priv);
 553                         if (ret)
 554                                 return -1;
 555                 }
 556         }
 557         if (adapter->mfg_mode) {
 558                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 559                 ret = -EINPROGRESS;
 560         } else {
 561                 for (i = 0; i < adapter->priv_num; i++) {
 562                         if (adapter->priv[i]) {
 563                                 ret = mwifiex_sta_init_cmd(adapter->priv[i],
 564                                                            first_sta, true);
 565                                 if (ret == -1)
 566                                         return -1;
 567
 568                                 first_sta = false;
 569                         }
 570
 571
 572
 573                 }
 574         }
 575
 576         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 577         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 578         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 579         if (!is_cmd_pend_q_empty) {
 580                 /* Send the first command in queue and return */
 581                 if (mwifiex_main_process(adapter) != -1)
 582                         ret = -EINPROGRESS;
 583         } else {
 584                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 585         }
 586
 587         return ret;
 588 }
 589
 590 /*
 591  * This function deletes the BSS priority tables.
 592  *
 593  * The function traverses through all the allocated BSS priority nodes
 594  * in every BSS priority table and frees them.
 595  */
 596 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 597 {
 598         int i;
 599         struct mwifiex_adapter *adapter = priv->adapter;
 600         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
 601         struct list_head *head;
 602         spinlock_t *lock; /* bss priority lock */
 603         unsigned long flags;
 604
 605         for (i = 0; i < adapter->priv_num; ++i) {
 606                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 607                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 608                 mwifiex_dbg(adapter, INFO,
 609                             "info: delete BSS priority table,\t"
 610                             "bss_type = %d, bss_num = %d, i = %d,\t"
 611                             "head = %p\n",
 612                             priv->bss_type, priv->bss_num, i, head);
 613
 614                 {
 615                         spin_lock_irqsave(lock, flags);
 616                         if (list_empty(head)) {
 617                                 spin_unlock_irqrestore(lock, flags);
 618                                 continue;
 619                         }
 620                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 621                                                  list) {
 622                                 if (bssprio_node->priv == priv) {
 623                                         mwifiex_dbg(adapter, INFO,
 624                                                     "info: Delete\t"
 625                                                     "node %p, next = %p\n",
 626                                                     bssprio_node, tmp_node);
 627                                         list_del(&bssprio_node->list);
 628                                         kfree(bssprio_node);
 629                                 }
 630                         }
 631                         spin_unlock_irqrestore(lock, flags);
 632                 }
 633         }
 634 }
 635
 636 /*
 637  * This function frees the private structure, including cleans
 638  * up the TX and RX queues and frees the BSS priority tables.
 639  */
 640 void mwifiex_free_priv(struct mwifiex_private *priv)
 641 {
 642         mwifiex_clean_txrx(priv);
 643         mwifiex_delete_bss_prio_tbl(priv);
 644         mwifiex_free_curr_bcn(priv);
 645 }
 646
 647 /*
 648  * This function is used to shutdown the driver.
 649  *
 650  * The following operations are performed sequentially -
 651  *      - Check if already shut down
 652  *      - Make sure the main process has stopped
 653  *      - Clean up the Tx and Rx queues
 654  *      - Delete BSS priority tables
 655  *      - Free the adapter
 656  *      - Notify completion
 657  */
 658 int
 659 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 660 {
 661         int ret = -EINPROGRESS;
 662         struct mwifiex_private *priv;
 663         s32 i;
 664         unsigned long flags;
 665         struct sk_buff *skb;
 666
 667         /* mwifiex already shutdown */
 668         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 669                 return 0;
 670
 671         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 672         /* wait for mwifiex_process to complete */
 673         if (adapter->mwifiex_processing) {
 674                 mwifiex_dbg(adapter, WARN,
 675                             "main process is still running\n");
 676                 return ret;
 677         }
 678
 679         /* cancel current command */
 680         if (adapter->curr_cmd) {
 681                 mwifiex_dbg(adapter, WARN,
 682                             "curr_cmd is still in processing\n");
 683                 del_timer_sync(&adapter->cmd_timer);
 684                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 685                 adapter->curr_cmd = NULL;
 686         }
 687
 688         /* shut down mwifiex */
 689         mwifiex_dbg(adapter, MSG,
 690                     "info: shutdown mwifiex...\n");
 691
 692         /* Clean up Tx/Rx queues and delete BSS priority table */
 693         for (i = 0; i < adapter->priv_num; i++) {
 694                 if (adapter->priv[i]) {
 695                         priv = adapter->priv[i];
 696
 697                         mwifiex_clean_auto_tdls(priv);
 698                         mwifiex_abort_cac(priv);
 699                         mwifiex_clean_txrx(priv);
 700                         mwifiex_delete_bss_prio_tbl(priv);
 701                 }
 702         }
 703
 704         atomic_set(&adapter->tx_queued, 0);
 705         while ((skb = skb_dequeue(&adapter->tx_data_q)))
 706                 mwifiex_write_data_complete(adapter, skb, 0, 0);
 707
 708         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 709
 710         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 711                 struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 712
 713                 atomic_dec(&adapter->rx_pending);
 714                 priv = adapter->priv[rx_info->bss_num];
 715                 if (priv)
 716                         priv->stats.rx_dropped++;
 717
 718                 dev_kfree_skb_any(skb);
 719         }
 720
 721         spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 722
 723         spin_lock(&adapter->mwifiex_lock);
 724
 725         mwifiex_adapter_cleanup(adapter);
 726
 727         spin_unlock(&adapter->mwifiex_lock);
 728
 729         /* Notify completion */
 730         ret = mwifiex_shutdown_fw_complete(adapter);
 731
 732         return ret;
 733 }
 734
 735 /*
 736  * This function downloads the firmware to the card.
 737  *
 738  * The actual download is preceded by two sanity checks -
 739  *      - Check if firmware is already running
 740  *      - Check if the interface is the winner to download the firmware
 741  *
 742  * ...and followed by another -
 743  *      - Check if the firmware is downloaded successfully
 744  *
 745  * After download is successfully completed, the host interrupts are enabled.
 746  */
 747 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 748                     struct mwifiex_fw_image *pmfw)
 749 {
 750         int ret;
 751         u32 poll_num = 1;
 752
 753         if (adapter->if_ops.check_fw_status) {
 754                 /* check if firmware is already running */
 755                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 756                 if (!ret) {
 757                         mwifiex_dbg(adapter, MSG,
 758                                     "WLAN FW already running! Skip FW dnld\n");
 759                         return 0;
 760                 }
 761         }
 762
 763         /* check if we are the winner for downloading FW */
 764         if (adapter->if_ops.check_winner_status) {
 765                 adapter->winner = 0;
 766                 ret = adapter->if_ops.check_winner_status(adapter);
 767
 768                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 769                 if (ret) {
 770                         mwifiex_dbg(adapter, MSG,
 771                                     "WLAN read winner status failed!\n");
 772                         return ret;
 773                 }
 774
 775                 if (!adapter->winner) {
 776                         mwifiex_dbg(adapter, MSG,
 777                                     "WLAN is not the winner! Skip FW dnld\n");
 778                         goto poll_fw;
 779                 }
 780         }
 781
 782         if (pmfw) {
 783                 /* Download firmware with helper */
 784                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 785                 if (ret) {
 786                         mwifiex_dbg(adapter, ERROR,
 787                                     "prog_fw failed ret=%#x\n", ret);
 788                         return ret;
 789                 }
 790         }
 791
 792 poll_fw:
 793         /* Check if the firmware is downloaded successfully or not */
 794         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 795         if (ret)
 796                 mwifiex_dbg(adapter, ERROR,
 797                             "FW failed to be active in time\n");
 798
 799         return ret;
 800 }
 801 EXPORT_SYMBOL_GPL(mwifiex_dnld_fw);