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 /*
  56  * This function initializes the private structure and sets default
  57  * values to the members.
  58  *
  59  * Additionally, it also initializes all the locks and sets up all the
  60  * lists.
  61  */
  62 int mwifiex_init_priv(struct mwifiex_private *priv)
  63 {
  64         u32 i;
  65
  66         priv->media_connected = false;
  67         memset(priv->curr_addr, 0xff, ETH_ALEN);
  68
  69         priv->pkt_tx_ctrl = 0;
  70         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
  71         priv->data_rate = 0;    /* Initially indicate the rate as auto */
  72         priv->is_data_rate_auto = true;
  73         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
  74         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
  75
  76         priv->sec_info.wep_enabled = 0;
  77         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
  78         priv->sec_info.encryption_mode = 0;
  79         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
  80                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
  81         priv->wep_key_curr_index = 0;
  82         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
  83                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
  84
  85         priv->beacon_period = 100; /* beacon interval */ ;
  86         priv->attempted_bss_desc = NULL;
  87         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
  88         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
  89
  90         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
  91         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
  92         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
  93         priv->assoc_rsp_size = 0;
  94         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
  95         priv->atim_window = 0;
  96         priv->adhoc_state = ADHOC_IDLE;
  97         priv->tx_power_level = 0;
  98         priv->max_tx_power_level = 0;
  99         priv->min_tx_power_level = 0;
 100         priv->tx_rate = 0;
 101         priv->rxpd_htinfo = 0;
 102         priv->rxpd_rate = 0;
 103         priv->rate_bitmap = 0;
 104         priv->data_rssi_last = 0;
 105         priv->data_rssi_avg = 0;
 106         priv->data_nf_avg = 0;
 107         priv->data_nf_last = 0;
 108         priv->bcn_rssi_last = 0;
 109         priv->bcn_rssi_avg = 0;
 110         priv->bcn_nf_avg = 0;
 111         priv->bcn_nf_last = 0;
 112         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 113         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 114         priv->wpa_ie_len = 0;
 115         priv->wpa_is_gtk_set = false;
 116
 117         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 118         priv->assoc_tlv_buf_len = 0;
 119         memset(&priv->wps, 0, sizeof(priv->wps));
 120         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 121         priv->gen_ie_buf_len = 0;
 122         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 123
 124         priv->wmm_required = true;
 125         priv->wmm_enabled = false;
 126         priv->wmm_qosinfo = 0;
 127         priv->curr_bcn_buf = NULL;
 128         priv->curr_bcn_size = 0;
 129         priv->wps_ie = NULL;
 130         priv->wps_ie_len = 0;
 131         priv->ap_11n_enabled = 0;
 132         memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg));
 133
 134         priv->scan_block = false;
 135
 136         priv->csa_chan = 0;
 137         priv->csa_expire_time = 0;
 138         priv->del_list_idx = 0;
 139
 140         return mwifiex_add_bss_prio_tbl(priv);
 141 }
 142
 143 /*
 144  * This function allocates buffers for members of the adapter
 145  * structure.
 146  *
 147  * The memory allocated includes scan table, command buffers, and
 148  * sleep confirm command buffer. In addition, the queues are
 149  * also initialized.
 150  */
 151 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 152 {
 153         int ret;
 154
 155         /* Allocate command buffer */
 156         ret = mwifiex_alloc_cmd_buffer(adapter);
 157         if (ret) {
 158                 dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
 159                         __func__);
 160                 return -1;
 161         }
 162
 163         adapter->sleep_cfm =
 164                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 165                               + INTF_HEADER_LEN);
 166
 167         if (!adapter->sleep_cfm) {
 168                 dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
 169                         " cmd buffer\n", __func__);
 170                 return -1;
 171         }
 172         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 173
 174         return 0;
 175 }
 176
 177 /*
 178  * This function initializes the adapter structure and sets default
 179  * values to the members of adapter.
 180  *
 181  * This also initializes the WMM related parameters in the driver private
 182  * structures.
 183  */
 184 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 185 {
 186         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 187
 188         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 189
 190         adapter->cmd_sent = false;
 191
 192         if (adapter->iface_type == MWIFIEX_SDIO)
 193                 adapter->data_sent = true;
 194         else
 195                 adapter->data_sent = false;
 196
 197         adapter->cmd_resp_received = false;
 198         adapter->event_received = false;
 199         adapter->data_received = false;
 200
 201         adapter->surprise_removed = false;
 202
 203         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 204
 205         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 206         adapter->ps_state = PS_STATE_AWAKE;
 207         adapter->need_to_wakeup = false;
 208
 209         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 210         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 211         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 212         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 213
 214         adapter->scan_probes = 1;
 215
 216         adapter->multiple_dtim = 1;
 217
 218         adapter->local_listen_interval = 0;     /* default value in firmware
 219                                                    will be used */
 220
 221         adapter->is_deep_sleep = false;
 222
 223         adapter->delay_null_pkt = false;
 224         adapter->delay_to_ps = 1000;
 225         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 226
 227         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 228                                            default */
 229         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 230                                            default */
 231         adapter->pm_wakeup_card_req = false;
 232
 233         adapter->pm_wakeup_fw_try = false;
 234
 235         adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 236         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 237
 238         adapter->is_hs_configured = false;
 239         adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF);
 240         adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF;
 241         adapter->hs_cfg.gap = HS_CFG_GAP_DEF;
 242         adapter->hs_activated = false;
 243
 244         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 245         adapter->hw_dot_11n_dev_cap = 0;
 246         adapter->hw_dev_mcs_support = 0;
 247         adapter->sec_chan_offset = 0;
 248         adapter->adhoc_11n_enabled = false;
 249
 250         mwifiex_wmm_init(adapter);
 251
 252         if (adapter->sleep_cfm) {
 253                 sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 254                                                 adapter->sleep_cfm->data;
 255                 memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 256                 sleep_cfm_buf->command =
 257                                 cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 258                 sleep_cfm_buf->size =
 259                                 cpu_to_le16(adapter->sleep_cfm->len);
 260                 sleep_cfm_buf->result = 0;
 261                 sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 262                 sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 263         }
 264         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 265         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 266         adapter->tx_lock_flag = false;
 267         adapter->null_pkt_interval = 0;
 268         adapter->fw_bands = 0;
 269         adapter->config_bands = 0;
 270         adapter->adhoc_start_band = 0;
 271         adapter->scan_channels = NULL;
 272         adapter->fw_release_number = 0;
 273         adapter->fw_cap_info = 0;
 274         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 275         adapter->event_cause = 0;
 276         adapter->region_code = 0;
 277         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 278         adapter->adhoc_awake_period = 0;
 279         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 280         adapter->arp_filter_size = 0;
 281         adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
 282         adapter->empty_tx_q_cnt = 0;
 283 }
 284
 285 /*
 286  * This function sets trans_start per tx_queue
 287  */
 288 void mwifiex_set_trans_start(struct net_device *dev)
 289 {
 290         int i;
 291
 292         for (i = 0; i < dev->num_tx_queues; i++)
 293                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 294
 295         dev->trans_start = jiffies;
 296 }
 297
 298 /*
 299  * This function wakes up all queues in net_device
 300  */
 301 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 302                                         struct mwifiex_adapter *adapter)
 303 {
 304         unsigned long dev_queue_flags;
 305         unsigned int i;
 306
 307         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 308
 309         for (i = 0; i < netdev->num_tx_queues; i++) {
 310                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 311
 312                 if (netif_tx_queue_stopped(txq))
 313                         netif_tx_wake_queue(txq);
 314         }
 315
 316         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 317 }
 318
 319 /*
 320  * This function stops all queues in net_device
 321  */
 322 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 323                                         struct mwifiex_adapter *adapter)
 324 {
 325         unsigned long dev_queue_flags;
 326         unsigned int i;
 327
 328         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 329
 330         for (i = 0; i < netdev->num_tx_queues; i++) {
 331                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 332
 333                 if (!netif_tx_queue_stopped(txq))
 334                         netif_tx_stop_queue(txq);
 335         }
 336
 337         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 338 }
 339
 340 /*
 341  *  This function releases the lock variables and frees the locks and
 342  *  associated locks.
 343  */
 344 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 345 {
 346         struct mwifiex_private *priv;
 347         s32 i, j;
 348
 349         /* Free lists */
 350         list_del(&adapter->cmd_free_q);
 351         list_del(&adapter->cmd_pending_q);
 352         list_del(&adapter->scan_pending_q);
 353
 354         for (i = 0; i < adapter->priv_num; i++)
 355                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 356
 357         for (i = 0; i < adapter->priv_num; i++) {
 358                 if (adapter->priv[i]) {
 359                         priv = adapter->priv[i];
 360                         for (j = 0; j < MAX_NUM_TID; ++j)
 361                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 362                         list_del(&priv->tx_ba_stream_tbl_ptr);
 363                         list_del(&priv->rx_reorder_tbl_ptr);
 364                         list_del(&priv->sta_list);
 365                 }
 366         }
 367 }
 368
 369 /*
 370  * This function performs cleanup for adapter structure.
 371  *
 372  * The cleanup is done recursively, by canceling all pending
 373  * commands, freeing the member buffers previously allocated
 374  * (command buffers, scan table buffer, sleep confirm command
 375  * buffer), stopping the timers and calling the cleanup routines
 376  * for every interface.
 377  */
 378 static void
 379 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
 380 {
 381         if (!adapter) {
 382                 pr_err("%s: adapter is NULL\n", __func__);
 383                 return;
 384         }
 385
 386         mwifiex_cancel_all_pending_cmd(adapter);
 387
 388         /* Free lock variables */
 389         mwifiex_free_lock_list(adapter);
 390
 391         /* Free command buffer */
 392         dev_dbg(adapter->dev, "info: free cmd buffer\n");
 393         mwifiex_free_cmd_buffer(adapter);
 394
 395         dev_dbg(adapter->dev, "info: free scan table\n");
 396
 397         if (adapter->sleep_cfm)
 398                 dev_kfree_skb_any(adapter->sleep_cfm);
 399 }
 400
 401 /*
 402  *  This function intializes the lock variables and
 403  *  the list heads.
 404  */
 405 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 406 {
 407         struct mwifiex_private *priv;
 408         s32 i, j;
 409
 410         spin_lock_init(&adapter->mwifiex_lock);
 411         spin_lock_init(&adapter->int_lock);
 412         spin_lock_init(&adapter->main_proc_lock);
 413         spin_lock_init(&adapter->mwifiex_cmd_lock);
 414         spin_lock_init(&adapter->queue_lock);
 415         for (i = 0; i < adapter->priv_num; i++) {
 416                 if (adapter->priv[i]) {
 417                         priv = adapter->priv[i];
 418                         spin_lock_init(&priv->rx_pkt_lock);
 419                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 420                         spin_lock_init(&priv->curr_bcn_buf_lock);
 421                         spin_lock_init(&priv->sta_list_spinlock);
 422                 }
 423         }
 424
 425         /* Initialize cmd_free_q */
 426         INIT_LIST_HEAD(&adapter->cmd_free_q);
 427         /* Initialize cmd_pending_q */
 428         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 429         /* Initialize scan_pending_q */
 430         INIT_LIST_HEAD(&adapter->scan_pending_q);
 431
 432         spin_lock_init(&adapter->cmd_free_q_lock);
 433         spin_lock_init(&adapter->cmd_pending_q_lock);
 434         spin_lock_init(&adapter->scan_pending_q_lock);
 435
 436         skb_queue_head_init(&adapter->usb_rx_data_q);
 437
 438         for (i = 0; i < adapter->priv_num; ++i) {
 439                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 440                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 441         }
 442
 443         for (i = 0; i < adapter->priv_num; i++) {
 444                 if (!adapter->priv[i])
 445                         continue;
 446                 priv = adapter->priv[i];
 447                 for (j = 0; j < MAX_NUM_TID; ++j)
 448                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 449                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 450                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 451                 INIT_LIST_HEAD(&priv->sta_list);
 452
 453                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 454                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 455         }
 456
 457         return 0;
 458 }
 459
 460 /*
 461  * This function initializes the firmware.
 462  *
 463  * The following operations are performed sequentially -
 464  *      - Allocate adapter structure
 465  *      - Initialize the adapter structure
 466  *      - Initialize the private structure
 467  *      - Add BSS priority tables to the adapter structure
 468  *      - For each interface, send the init commands to firmware
 469  *      - Send the first command in command pending queue, if available
 470  */
 471 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 472 {
 473         int ret;
 474         struct mwifiex_private *priv;
 475         u8 i, first_sta = true;
 476         int is_cmd_pend_q_empty;
 477         unsigned long flags;
 478
 479         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 480
 481         /* Allocate memory for member of adapter structure */
 482         ret = mwifiex_allocate_adapter(adapter);
 483         if (ret)
 484                 return -1;
 485
 486         /* Initialize adapter structure */
 487         mwifiex_init_adapter(adapter);
 488
 489         for (i = 0; i < adapter->priv_num; i++) {
 490                 if (adapter->priv[i]) {
 491                         priv = adapter->priv[i];
 492
 493                         /* Initialize private structure */
 494                         ret = mwifiex_init_priv(priv);
 495                         if (ret)
 496                                 return -1;
 497                 }
 498         }
 499
 500         if (adapter->if_ops.init_fw_port) {
 501                 if (adapter->if_ops.init_fw_port(adapter))
 502                         return -1;
 503         }
 504
 505         for (i = 0; i < adapter->priv_num; i++) {
 506                 if (adapter->priv[i]) {
 507                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
 508                         if (ret == -1)
 509                                 return -1;
 510
 511                         first_sta = false;
 512                 }
 513         }
 514
 515         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 516         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 517         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 518         if (!is_cmd_pend_q_empty) {
 519                 /* Send the first command in queue and return */
 520                 if (mwifiex_main_process(adapter) != -1)
 521                         ret = -EINPROGRESS;
 522         } else {
 523                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 524         }
 525
 526         return ret;
 527 }
 528
 529 /*
 530  * This function deletes the BSS priority tables.
 531  *
 532  * The function traverses through all the allocated BSS priority nodes
 533  * in every BSS priority table and frees them.
 534  */
 535 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 536 {
 537         int i;
 538         struct mwifiex_adapter *adapter = priv->adapter;
 539         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
 540         struct list_head *head;
 541         spinlock_t *lock; /* bss priority lock */
 542         unsigned long flags;
 543
 544         for (i = 0; i < adapter->priv_num; ++i) {
 545                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 546                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 547                 dev_dbg(adapter->dev, "info: delete BSS priority table,"
 548                                 " bss_type = %d, bss_num = %d, i = %d,"
 549                                 " head = %p\n",
 550                               priv->bss_type, priv->bss_num, i, head);
 551
 552                 {
 553                         spin_lock_irqsave(lock, flags);
 554                         if (list_empty(head)) {
 555                                 spin_unlock_irqrestore(lock, flags);
 556                                 continue;
 557                         }
 558                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 559                                                  list) {
 560                                 if (bssprio_node->priv == priv) {
 561                                         dev_dbg(adapter->dev, "info: Delete "
 562                                                 "node %p, next = %p\n",
 563                                                 bssprio_node, tmp_node);
 564                                         list_del(&bssprio_node->list);
 565                                         kfree(bssprio_node);
 566                                 }
 567                         }
 568                         spin_unlock_irqrestore(lock, flags);
 569                 }
 570         }
 571 }
 572
 573 /*
 574  * This function frees the private structure, including cleans
 575  * up the TX and RX queues and frees the BSS priority tables.
 576  */
 577 void mwifiex_free_priv(struct mwifiex_private *priv)
 578 {
 579         mwifiex_clean_txrx(priv);
 580         mwifiex_delete_bss_prio_tbl(priv);
 581         mwifiex_free_curr_bcn(priv);
 582 }
 583
 584 /*
 585  * This function is used to shutdown the driver.
 586  *
 587  * The following operations are performed sequentially -
 588  *      - Check if already shut down
 589  *      - Make sure the main process has stopped
 590  *      - Clean up the Tx and Rx queues
 591  *      - Delete BSS priority tables
 592  *      - Free the adapter
 593  *      - Notify completion
 594  */
 595 int
 596 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 597 {
 598         int ret = -EINPROGRESS;
 599         struct mwifiex_private *priv;
 600         s32 i;
 601         struct sk_buff *skb;
 602
 603         /* mwifiex already shutdown */
 604         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 605                 return 0;
 606
 607         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 608         /* wait for mwifiex_process to complete */
 609         if (adapter->mwifiex_processing) {
 610                 dev_warn(adapter->dev, "main process is still running\n");
 611                 return ret;
 612         }
 613
 614         /* cancel current command */
 615         if (adapter->curr_cmd) {
 616                 dev_warn(adapter->dev, "curr_cmd is still in processing\n");
 617                 del_timer(&adapter->cmd_timer);
 618                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 619                 adapter->curr_cmd = NULL;
 620         }
 621
 622         /* shut down mwifiex */
 623         dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");
 624
 625         /* Clean up Tx/Rx queues and delete BSS priority table */
 626         for (i = 0; i < adapter->priv_num; i++) {
 627                 if (adapter->priv[i]) {
 628                         priv = adapter->priv[i];
 629
 630                         mwifiex_clean_txrx(priv);
 631                         mwifiex_delete_bss_prio_tbl(priv);
 632                 }
 633         }
 634
 635         spin_lock(&adapter->mwifiex_lock);
 636
 637         if (adapter->if_ops.data_complete) {
 638                 while ((skb = skb_dequeue(&adapter->usb_rx_data_q))) {
 639                         struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 640
 641                         priv = adapter->priv[rx_info->bss_num];
 642                         if (priv)
 643                                 priv->stats.rx_dropped++;
 644
 645                         adapter->if_ops.data_complete(adapter, skb);
 646                 }
 647         }
 648
 649         mwifiex_adapter_cleanup(adapter);
 650
 651         spin_unlock(&adapter->mwifiex_lock);
 652
 653         /* Notify completion */
 654         ret = mwifiex_shutdown_fw_complete(adapter);
 655
 656         return ret;
 657 }
 658
 659 /*
 660  * This function downloads the firmware to the card.
 661  *
 662  * The actual download is preceded by two sanity checks -
 663  *      - Check if firmware is already running
 664  *      - Check if the interface is the winner to download the firmware
 665  *
 666  * ...and followed by another -
 667  *      - Check if the firmware is downloaded successfully
 668  *
 669  * After download is successfully completed, the host interrupts are enabled.
 670  */
 671 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 672                     struct mwifiex_fw_image *pmfw)
 673 {
 674         int ret;
 675         u32 poll_num = 1;
 676
 677         if (adapter->if_ops.check_fw_status) {
 678                 adapter->winner = 0;
 679
 680                 /* check if firmware is already running */
 681                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 682                 if (!ret) {
 683                         dev_notice(adapter->dev,
 684                                    "WLAN FW already running! Skip FW dnld\n");
 685                         return 0;
 686                 }
 687
 688                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 689
 690                 /* check if we are the winner for downloading FW */
 691                 if (!adapter->winner) {
 692                         dev_notice(adapter->dev,
 693                                    "FW already running! Skip FW dnld\n");
 694                         goto poll_fw;
 695                 }
 696         }
 697
 698         if (pmfw) {
 699                 /* Download firmware with helper */
 700                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 701                 if (ret) {
 702                         dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
 703                         return ret;
 704                 }
 705         }
 706
 707 poll_fw:
 708         /* Check if the firmware is downloaded successfully or not */
 709         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 710         if (ret)
 711                 dev_err(adapter->dev, "FW failed to be active in time\n");
 712
 713         return ret;
 714 }