drivers/net/wireless/mwifiex/init.c

   1 /*
   2  * Marvell Wireless LAN device driver: HW/FW Initialization
   3  *
   4  * Copyright (C) 2011, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27
  28 /*
  29  * This function adds a BSS priority table to the table list.
  30  *
  31  * The function allocates a new BSS priority table node and adds it to
  32  * the end of BSS priority table list, kept in driver memory.
  33  */
  34 static int mwifiex_add_bss_prio_tbl(struct mwifiex_private *priv)
  35 {
  36         struct mwifiex_adapter *adapter = priv->adapter;
  37         struct mwifiex_bss_prio_node *bss_prio;
  38         struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
  39         unsigned long flags;
  40
  41         bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
  42         if (!bss_prio)
  43                 return -ENOMEM;
  44
  45         bss_prio->priv = priv;
  46         INIT_LIST_HEAD(&bss_prio->list);
  47
  48         spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags);
  49         list_add_tail(&bss_prio->list, &tbl[priv->bss_priority].bss_prio_head);
  50         spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags);
  51
  52         return 0;
  53 }
  54
  55 static void scan_delay_timer_fn(unsigned long data)
  56 {
  57         struct mwifiex_private *priv = (struct mwifiex_private *)data;
  58         struct mwifiex_adapter *adapter = priv->adapter;
  59         struct cmd_ctrl_node *cmd_node, *tmp_node;
  60         unsigned long flags;
  61
  62         if (adapter->scan_delay_cnt == MWIFIEX_MAX_SCAN_DELAY_CNT) {
  63                 /*
  64                  * Abort scan operation by cancelling all pending scan
  65                  * commands
  66                  */
  67                 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
  68                 list_for_each_entry_safe(cmd_node, tmp_node,
  69                                          &adapter->scan_pending_q, list) {
  70                         list_del(&cmd_node->list);
  71                         mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
  72                 }
  73                 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
  74
  75                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
  76                 adapter->scan_processing = false;
  77                 adapter->scan_delay_cnt = 0;
  78                 adapter->empty_tx_q_cnt = 0;
  79                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
  80
  81                 if (priv->user_scan_cfg) {
  82                         if (priv->scan_request) {
  83                                 dev_dbg(priv->adapter->dev,
  84                                         "info: aborting scan\n");
  85                                 cfg80211_scan_done(priv->scan_request, 1);
  86                                 priv->scan_request = NULL;
  87                         } else {
  88                                 dev_dbg(priv->adapter->dev,
  89                                         "info: scan already aborted\n");
  90                         }
  91
  92                         kfree(priv->user_scan_cfg);
  93                         priv->user_scan_cfg = NULL;
  94                 }
  95                 goto done;
  96         }
  97
  98         if (!atomic_read(&priv->adapter->is_tx_received)) {
  99                 adapter->empty_tx_q_cnt++;
 100                 if (adapter->empty_tx_q_cnt == MWIFIEX_MAX_EMPTY_TX_Q_CNT) {
 101                         /*
 102                          * No Tx traffic for 200msec. Get scan command from
 103                          * scan pending queue and put to cmd pending queue to
 104                          * resume scan operation
 105                          */
 106                         adapter->scan_delay_cnt = 0;
 107                         adapter->empty_tx_q_cnt = 0;
 108                         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
 109                         cmd_node = list_first_entry(&adapter->scan_pending_q,
 110                                                     struct cmd_ctrl_node, list);
 111                         list_del(&cmd_node->list);
 112                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
 113                                                flags);
 114
 115                         mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
 116                                                         true);
 117                         queue_work(adapter->workqueue, &adapter->main_work);
 118                         goto done;
 119                 }
 120         } else {
 121                 adapter->empty_tx_q_cnt = 0;
 122         }
 123
 124         /* Delay scan operation further by 20msec */
 125         mod_timer(&priv->scan_delay_timer, jiffies +
 126                   msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
 127         adapter->scan_delay_cnt++;
 128
 129 done:
 130         if (atomic_read(&priv->adapter->is_tx_received))
 131                 atomic_set(&priv->adapter->is_tx_received, false);
 132
 133         return;
 134 }
 135
 136 /*
 137  * This function initializes the private structure and sets default
 138  * values to the members.
 139  *
 140  * Additionally, it also initializes all the locks and sets up all the
 141  * lists.
 142  */
 143 int mwifiex_init_priv(struct mwifiex_private *priv)
 144 {
 145         u32 i;
 146
 147         priv->media_connected = false;
 148         memset(priv->curr_addr, 0xff, ETH_ALEN);
 149
 150         priv->pkt_tx_ctrl = 0;
 151         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
 152         priv->data_rate = 0;    /* Initially indicate the rate as auto */
 153         priv->is_data_rate_auto = true;
 154         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
 155         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
 156
 157         priv->sec_info.wep_enabled = 0;
 158         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
 159         priv->sec_info.encryption_mode = 0;
 160         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
 161                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
 162         priv->wep_key_curr_index = 0;
 163         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
 164                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
 165
 166         priv->beacon_period = 100; /* beacon interval */ ;
 167         priv->attempted_bss_desc = NULL;
 168         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 169         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 170
 171         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 172         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 173         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 174         priv->assoc_rsp_size = 0;
 175         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 176         priv->atim_window = 0;
 177         priv->adhoc_state = ADHOC_IDLE;
 178         priv->tx_power_level = 0;
 179         priv->max_tx_power_level = 0;
 180         priv->min_tx_power_level = 0;
 181         priv->tx_rate = 0;
 182         priv->rxpd_htinfo = 0;
 183         priv->rxpd_rate = 0;
 184         priv->rate_bitmap = 0;
 185         priv->data_rssi_last = 0;
 186         priv->data_rssi_avg = 0;
 187         priv->data_nf_avg = 0;
 188         priv->data_nf_last = 0;
 189         priv->bcn_rssi_last = 0;
 190         priv->bcn_rssi_avg = 0;
 191         priv->bcn_nf_avg = 0;
 192         priv->bcn_nf_last = 0;
 193         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 194         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 195         priv->wpa_ie_len = 0;
 196         priv->wpa_is_gtk_set = false;
 197
 198         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 199         priv->assoc_tlv_buf_len = 0;
 200         memset(&priv->wps, 0, sizeof(priv->wps));
 201         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 202         priv->gen_ie_buf_len = 0;
 203         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 204
 205         priv->wmm_required = true;
 206         priv->wmm_enabled = false;
 207         priv->wmm_qosinfo = 0;
 208         priv->curr_bcn_buf = NULL;
 209         priv->curr_bcn_size = 0;
 210         priv->wps_ie = NULL;
 211         priv->wps_ie_len = 0;
 212         priv->ap_11n_enabled = 0;
 213         memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg));
 214
 215         priv->scan_block = false;
 216
 217         setup_timer(&priv->scan_delay_timer, scan_delay_timer_fn,
 218                     (unsigned long)priv);
 219
 220         return mwifiex_add_bss_prio_tbl(priv);
 221 }
 222
 223 /*
 224  * This function allocates buffers for members of the adapter
 225  * structure.
 226  *
 227  * The memory allocated includes scan table, command buffers, and
 228  * sleep confirm command buffer. In addition, the queues are
 229  * also initialized.
 230  */
 231 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 232 {
 233         int ret;
 234
 235         /* Allocate command buffer */
 236         ret = mwifiex_alloc_cmd_buffer(adapter);
 237         if (ret) {
 238                 dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
 239                         __func__);
 240                 return -1;
 241         }
 242
 243         adapter->sleep_cfm =
 244                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 245                               + INTF_HEADER_LEN);
 246
 247         if (!adapter->sleep_cfm) {
 248                 dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
 249                         " cmd buffer\n", __func__);
 250                 return -1;
 251         }
 252         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 253
 254         return 0;
 255 }
 256
 257 /*
 258  * This function initializes the adapter structure and sets default
 259  * values to the members of adapter.
 260  *
 261  * This also initializes the WMM related parameters in the driver private
 262  * structures.
 263  */
 264 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 265 {
 266         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 267
 268         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 269
 270         adapter->cmd_sent = false;
 271
 272         if (adapter->iface_type == MWIFIEX_SDIO)
 273                 adapter->data_sent = true;
 274         else
 275                 adapter->data_sent = false;
 276
 277         adapter->cmd_resp_received = false;
 278         adapter->event_received = false;
 279         adapter->data_received = false;
 280
 281         adapter->surprise_removed = false;
 282
 283         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 284
 285         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 286         adapter->ps_state = PS_STATE_AWAKE;
 287         adapter->need_to_wakeup = false;
 288
 289         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 290         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 291         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 292         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 293
 294         adapter->scan_probes = 1;
 295
 296         adapter->multiple_dtim = 1;
 297
 298         adapter->local_listen_interval = 0;     /* default value in firmware
 299                                                    will be used */
 300
 301         adapter->is_deep_sleep = false;
 302
 303         adapter->delay_null_pkt = false;
 304         adapter->delay_to_ps = 1000;
 305         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 306
 307         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 308                                            default */
 309         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 310                                            default */
 311         adapter->pm_wakeup_card_req = false;
 312
 313         adapter->pm_wakeup_fw_try = false;
 314
 315         adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 316         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 317
 318         adapter->is_hs_configured = false;
 319         adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF);
 320         adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF;
 321         adapter->hs_cfg.gap = HS_CFG_GAP_DEF;
 322         adapter->hs_activated = false;
 323
 324         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 325         adapter->hw_dot_11n_dev_cap = 0;
 326         adapter->hw_dev_mcs_support = 0;
 327         adapter->sec_chan_offset = 0;
 328         adapter->adhoc_11n_enabled = false;
 329
 330         mwifiex_wmm_init(adapter);
 331
 332         if (adapter->sleep_cfm) {
 333                 sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 334                                                 adapter->sleep_cfm->data;
 335                 memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 336                 sleep_cfm_buf->command =
 337                                 cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 338                 sleep_cfm_buf->size =
 339                                 cpu_to_le16(adapter->sleep_cfm->len);
 340                 sleep_cfm_buf->result = 0;
 341                 sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 342                 sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 343         }
 344         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 345         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 346         adapter->tx_lock_flag = false;
 347         adapter->null_pkt_interval = 0;
 348         adapter->fw_bands = 0;
 349         adapter->config_bands = 0;
 350         adapter->adhoc_start_band = 0;
 351         adapter->scan_channels = NULL;
 352         adapter->fw_release_number = 0;
 353         adapter->fw_cap_info = 0;
 354         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 355         adapter->event_cause = 0;
 356         adapter->region_code = 0;
 357         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 358         adapter->adhoc_awake_period = 0;
 359         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 360         adapter->arp_filter_size = 0;
 361         adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
 362         adapter->empty_tx_q_cnt = 0;
 363 }
 364
 365 /*
 366  * This function sets trans_start per tx_queue
 367  */
 368 void mwifiex_set_trans_start(struct net_device *dev)
 369 {
 370         int i;
 371
 372         for (i = 0; i < dev->num_tx_queues; i++)
 373                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 374
 375         dev->trans_start = jiffies;
 376 }
 377
 378 /*
 379  * This function wakes up all queues in net_device
 380  */
 381 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 382                                         struct mwifiex_adapter *adapter)
 383 {
 384         unsigned long dev_queue_flags;
 385         unsigned int i;
 386
 387         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 388
 389         for (i = 0; i < netdev->num_tx_queues; i++) {
 390                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 391
 392                 if (netif_tx_queue_stopped(txq))
 393                         netif_tx_wake_queue(txq);
 394         }
 395
 396         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 397 }
 398
 399 /*
 400  * This function stops all queues in net_device
 401  */
 402 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 403                                         struct mwifiex_adapter *adapter)
 404 {
 405         unsigned long dev_queue_flags;
 406         unsigned int i;
 407
 408         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 409
 410         for (i = 0; i < netdev->num_tx_queues; i++) {
 411                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 412
 413                 if (!netif_tx_queue_stopped(txq))
 414                         netif_tx_stop_queue(txq);
 415         }
 416
 417         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 418 }
 419
 420 /*
 421  *  This function releases the lock variables and frees the locks and
 422  *  associated locks.
 423  */
 424 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 425 {
 426         struct mwifiex_private *priv;
 427         s32 i, j;
 428
 429         /* Free lists */
 430         list_del(&adapter->cmd_free_q);
 431         list_del(&adapter->cmd_pending_q);
 432         list_del(&adapter->scan_pending_q);
 433
 434         for (i = 0; i < adapter->priv_num; i++)
 435                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 436
 437         for (i = 0; i < adapter->priv_num; i++) {
 438                 if (adapter->priv[i]) {
 439                         priv = adapter->priv[i];
 440                         for (j = 0; j < MAX_NUM_TID; ++j)
 441                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 442                         list_del(&priv->tx_ba_stream_tbl_ptr);
 443                         list_del(&priv->rx_reorder_tbl_ptr);
 444                         list_del(&priv->sta_list);
 445                 }
 446         }
 447 }
 448
 449 /*
 450  * This function frees the adapter structure.
 451  *
 452  * The freeing operation is done recursively, by canceling all
 453  * pending commands, freeing the member buffers previously
 454  * allocated (command buffers, scan table buffer, sleep confirm
 455  * command buffer), stopping the timers and calling the cleanup
 456  * routines for every interface, before the actual adapter
 457  * structure is freed.
 458  */
 459 static void
 460 mwifiex_free_adapter(struct mwifiex_adapter *adapter)
 461 {
 462         if (!adapter) {
 463                 pr_err("%s: adapter is NULL\n", __func__);
 464                 return;
 465         }
 466
 467         mwifiex_cancel_all_pending_cmd(adapter);
 468
 469         /* Free lock variables */
 470         mwifiex_free_lock_list(adapter);
 471
 472         /* Free command buffer */
 473         dev_dbg(adapter->dev, "info: free cmd buffer\n");
 474         mwifiex_free_cmd_buffer(adapter);
 475
 476         del_timer(&adapter->cmd_timer);
 477
 478         dev_dbg(adapter->dev, "info: free scan table\n");
 479
 480         if (adapter->if_ops.cleanup_if)
 481                 adapter->if_ops.cleanup_if(adapter);
 482
 483         if (adapter->sleep_cfm)
 484                 dev_kfree_skb_any(adapter->sleep_cfm);
 485 }
 486
 487 /*
 488  *  This function intializes the lock variables and
 489  *  the list heads.
 490  */
 491 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 492 {
 493         struct mwifiex_private *priv;
 494         s32 i, j;
 495
 496         spin_lock_init(&adapter->mwifiex_lock);
 497         spin_lock_init(&adapter->int_lock);
 498         spin_lock_init(&adapter->main_proc_lock);
 499         spin_lock_init(&adapter->mwifiex_cmd_lock);
 500         spin_lock_init(&adapter->queue_lock);
 501         for (i = 0; i < adapter->priv_num; i++) {
 502                 if (adapter->priv[i]) {
 503                         priv = adapter->priv[i];
 504                         spin_lock_init(&priv->rx_pkt_lock);
 505                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 506                         spin_lock_init(&priv->curr_bcn_buf_lock);
 507                         spin_lock_init(&priv->sta_list_spinlock);
 508                 }
 509         }
 510
 511         /* Initialize cmd_free_q */
 512         INIT_LIST_HEAD(&adapter->cmd_free_q);
 513         /* Initialize cmd_pending_q */
 514         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 515         /* Initialize scan_pending_q */
 516         INIT_LIST_HEAD(&adapter->scan_pending_q);
 517
 518         spin_lock_init(&adapter->cmd_free_q_lock);
 519         spin_lock_init(&adapter->cmd_pending_q_lock);
 520         spin_lock_init(&adapter->scan_pending_q_lock);
 521
 522         skb_queue_head_init(&adapter->usb_rx_data_q);
 523
 524         for (i = 0; i < adapter->priv_num; ++i) {
 525                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 526                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 527         }
 528
 529         for (i = 0; i < adapter->priv_num; i++) {
 530                 if (!adapter->priv[i])
 531                         continue;
 532                 priv = adapter->priv[i];
 533                 for (j = 0; j < MAX_NUM_TID; ++j)
 534                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 535                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 536                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 537                 INIT_LIST_HEAD(&priv->sta_list);
 538
 539                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 540                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 541         }
 542
 543         return 0;
 544 }
 545
 546 /*
 547  * This function initializes the firmware.
 548  *
 549  * The following operations are performed sequentially -
 550  *      - Allocate adapter structure
 551  *      - Initialize the adapter structure
 552  *      - Initialize the private structure
 553  *      - Add BSS priority tables to the adapter structure
 554  *      - For each interface, send the init commands to firmware
 555  *      - Send the first command in command pending queue, if available
 556  */
 557 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 558 {
 559         int ret;
 560         struct mwifiex_private *priv;
 561         u8 i, first_sta = true;
 562         int is_cmd_pend_q_empty;
 563         unsigned long flags;
 564
 565         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 566
 567         /* Allocate memory for member of adapter structure */
 568         ret = mwifiex_allocate_adapter(adapter);
 569         if (ret)
 570                 return -1;
 571
 572         /* Initialize adapter structure */
 573         mwifiex_init_adapter(adapter);
 574
 575         for (i = 0; i < adapter->priv_num; i++) {
 576                 if (adapter->priv[i]) {
 577                         priv = adapter->priv[i];
 578
 579                         /* Initialize private structure */
 580                         ret = mwifiex_init_priv(priv);
 581                         if (ret)
 582                                 return -1;
 583                 }
 584         }
 585
 586         if (adapter->if_ops.init_fw_port) {
 587                 if (adapter->if_ops.init_fw_port(adapter))
 588                         return -1;
 589         }
 590
 591         for (i = 0; i < adapter->priv_num; i++) {
 592                 if (adapter->priv[i]) {
 593                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
 594                         if (ret == -1)
 595                                 return -1;
 596
 597                         first_sta = false;
 598                 }
 599         }
 600
 601         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 602         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 603         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 604         if (!is_cmd_pend_q_empty) {
 605                 /* Send the first command in queue and return */
 606                 if (mwifiex_main_process(adapter) != -1)
 607                         ret = -EINPROGRESS;
 608         } else {
 609                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 610         }
 611
 612         return ret;
 613 }
 614
 615 /*
 616  * This function deletes the BSS priority tables.
 617  *
 618  * The function traverses through all the allocated BSS priority nodes
 619  * in every BSS priority table and frees them.
 620  */
 621 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 622 {
 623         int i;
 624         struct mwifiex_adapter *adapter = priv->adapter;
 625         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
 626         struct list_head *head;
 627         spinlock_t *lock; /* bss priority lock */
 628         unsigned long flags;
 629
 630         for (i = 0; i < adapter->priv_num; ++i) {
 631                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 632                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 633                 dev_dbg(adapter->dev, "info: delete BSS priority table,"
 634                                 " bss_type = %d, bss_num = %d, i = %d,"
 635                                 " head = %p\n",
 636                               priv->bss_type, priv->bss_num, i, head);
 637
 638                 {
 639                         spin_lock_irqsave(lock, flags);
 640                         if (list_empty(head)) {
 641                                 spin_unlock_irqrestore(lock, flags);
 642                                 continue;
 643                         }
 644                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 645                                                  list) {
 646                                 if (bssprio_node->priv == priv) {
 647                                         dev_dbg(adapter->dev, "info: Delete "
 648                                                 "node %p, next = %p\n",
 649                                                 bssprio_node, tmp_node);
 650                                         list_del(&bssprio_node->list);
 651                                         kfree(bssprio_node);
 652                                 }
 653                         }
 654                         spin_unlock_irqrestore(lock, flags);
 655                 }
 656         }
 657 }
 658
 659 /*
 660  * This function frees the private structure, including cleans
 661  * up the TX and RX queues and frees the BSS priority tables.
 662  */
 663 void mwifiex_free_priv(struct mwifiex_private *priv)
 664 {
 665         mwifiex_clean_txrx(priv);
 666         mwifiex_delete_bss_prio_tbl(priv);
 667         mwifiex_free_curr_bcn(priv);
 668 }
 669
 670 /*
 671  * This function is used to shutdown the driver.
 672  *
 673  * The following operations are performed sequentially -
 674  *      - Check if already shut down
 675  *      - Make sure the main process has stopped
 676  *      - Clean up the Tx and Rx queues
 677  *      - Delete BSS priority tables
 678  *      - Free the adapter
 679  *      - Notify completion
 680  */
 681 int
 682 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 683 {
 684         int ret = -EINPROGRESS;
 685         struct mwifiex_private *priv;
 686         s32 i;
 687         unsigned long flags;
 688         struct sk_buff *skb;
 689
 690         /* mwifiex already shutdown */
 691         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 692                 return 0;
 693
 694         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 695         /* wait for mwifiex_process to complete */
 696         if (adapter->mwifiex_processing) {
 697                 dev_warn(adapter->dev, "main process is still running\n");
 698                 return ret;
 699         }
 700
 701         /* cancel current command */
 702         if (adapter->curr_cmd) {
 703                 dev_warn(adapter->dev, "curr_cmd is still in processing\n");
 704                 del_timer(&adapter->cmd_timer);
 705                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 706                 adapter->curr_cmd = NULL;
 707         }
 708
 709         /* shut down mwifiex */
 710         dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");
 711
 712         /* Clean up Tx/Rx queues and delete BSS priority table */
 713         for (i = 0; i < adapter->priv_num; i++) {
 714                 if (adapter->priv[i]) {
 715                         priv = adapter->priv[i];
 716
 717                         mwifiex_clean_txrx(priv);
 718                         mwifiex_delete_bss_prio_tbl(priv);
 719                 }
 720         }
 721
 722         spin_lock_irqsave(&adapter->mwifiex_lock, flags);
 723
 724         if (adapter->if_ops.data_complete) {
 725                 while ((skb = skb_dequeue(&adapter->usb_rx_data_q))) {
 726                         struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 727
 728                         priv = adapter->priv[rx_info->bss_num];
 729                         if (priv)
 730                                 priv->stats.rx_dropped++;
 731
 732                         adapter->if_ops.data_complete(adapter, skb);
 733                 }
 734         }
 735
 736         /* Free adapter structure */
 737         mwifiex_free_adapter(adapter);
 738
 739         spin_unlock_irqrestore(&adapter->mwifiex_lock, flags);
 740
 741         /* Notify completion */
 742         ret = mwifiex_shutdown_fw_complete(adapter);
 743
 744         return ret;
 745 }
 746
 747 /*
 748  * This function downloads the firmware to the card.
 749  *
 750  * The actual download is preceded by two sanity checks -
 751  *      - Check if firmware is already running
 752  *      - Check if the interface is the winner to download the firmware
 753  *
 754  * ...and followed by another -
 755  *      - Check if the firmware is downloaded successfully
 756  *
 757  * After download is successfully completed, the host interrupts are enabled.
 758  */
 759 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 760                     struct mwifiex_fw_image *pmfw)
 761 {
 762         int ret;
 763         u32 poll_num = 1;
 764
 765         if (adapter->if_ops.check_fw_status) {
 766                 adapter->winner = 0;
 767
 768                 /* check if firmware is already running */
 769                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 770                 if (!ret) {
 771                         dev_notice(adapter->dev,
 772                                    "WLAN FW already running! Skip FW dnld\n");
 773                         goto done;
 774                 }
 775
 776                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 777
 778                 /* check if we are the winner for downloading FW */
 779                 if (!adapter->winner) {
 780                         dev_notice(adapter->dev,
 781                                    "FW already running! Skip FW dnld\n");
 782                         poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
 783                         goto poll_fw;
 784                 }
 785         }
 786
 787         if (pmfw) {
 788                 /* Download firmware with helper */
 789                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 790                 if (ret) {
 791                         dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
 792                         return ret;
 793                 }
 794         }
 795
 796 poll_fw:
 797         /* Check if the firmware is downloaded successfully or not */
 798         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 799         if (ret) {
 800                 dev_err(adapter->dev, "FW failed to be active in time\n");
 801                 return -1;
 802         }
 803 done:
 804         /* re-enable host interrupt for mwifiex after fw dnld is successful */
 805         if (adapter->if_ops.enable_int)
 806                 adapter->if_ops.enable_int(adapter);
 807
 808         return ret;
 809 }