drivers/net/wireless/marvell/mwifiex/init.c

   1 /*
   2  * NXP Wireless LAN device driver: HW/FW Initialization
   3  *
   4  * Copyright 2011-2020 NXP
   5  *
   6  * This software file (the "File") is distributed by NXP
   7  * 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
  40         bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
  41         if (!bss_prio)
  42                 return -ENOMEM;
  43
  44         bss_prio->priv = priv;
  45         INIT_LIST_HEAD(&bss_prio->list);
  46
  47         spin_lock_bh(&tbl[priv->bss_priority].bss_prio_lock);
  48         list_add_tail(&bss_prio->list, &tbl[priv->bss_priority].bss_prio_head);
  49         spin_unlock_bh(&tbl[priv->bss_priority].bss_prio_lock);
  50
  51         return 0;
  52 }
  53
  54 static void wakeup_timer_fn(struct timer_list *t)
  55 {
  56         struct mwifiex_adapter *adapter = from_timer(adapter, t, wakeup_timer);
  57
  58         mwifiex_dbg(adapter, ERROR, "Firmware wakeup failed\n");
  59         adapter->hw_status = MWIFIEX_HW_STATUS_RESET;
  60         mwifiex_cancel_all_pending_cmd(adapter);
  61
  62         if (adapter->if_ops.card_reset)
  63                 adapter->if_ops.card_reset(adapter);
  64 }
  65
  66 static void fw_dump_work(struct work_struct *work)
  67 {
  68         struct mwifiex_adapter *adapter =
  69                 container_of(work, struct mwifiex_adapter, devdump_work.work);
  70
  71         mwifiex_upload_device_dump(adapter);
  72 }
  73
  74 /*
  75  * This function initializes the private structure and sets default
  76  * values to the members.
  77  *
  78  * Additionally, it also initializes all the locks and sets up all the
  79  * lists.
  80  */
  81 int mwifiex_init_priv(struct mwifiex_private *priv)
  82 {
  83         u32 i;
  84
  85         priv->media_connected = false;
  86         eth_broadcast_addr(priv->curr_addr);
  87         priv->port_open = false;
  88         priv->usb_port = MWIFIEX_USB_EP_DATA;
  89         priv->pkt_tx_ctrl = 0;
  90         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
  91         priv->data_rate = 0;    /* Initially indicate the rate as auto */
  92         priv->is_data_rate_auto = true;
  93         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
  94         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
  95
  96         priv->sec_info.wep_enabled = 0;
  97         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
  98         priv->sec_info.encryption_mode = 0;
  99         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
 100                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
 101         priv->wep_key_curr_index = 0;
 102         priv->curr_pkt_filter = HostCmd_ACT_MAC_DYNAMIC_BW_ENABLE |
 103                                 HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
 104                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
 105
 106         priv->beacon_period = 100; /* beacon interval */
 107         priv->attempted_bss_desc = NULL;
 108         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 109         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 110
 111         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 112         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 113         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 114         priv->assoc_rsp_size = 0;
 115         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 116         priv->atim_window = 0;
 117         priv->adhoc_state = ADHOC_IDLE;
 118         priv->tx_power_level = 0;
 119         priv->max_tx_power_level = 0;
 120         priv->min_tx_power_level = 0;
 121         priv->tx_ant = 0;
 122         priv->rx_ant = 0;
 123         priv->tx_rate = 0;
 124         priv->rxpd_htinfo = 0;
 125         priv->rxpd_rate = 0;
 126         priv->rate_bitmap = 0;
 127         priv->data_rssi_last = 0;
 128         priv->data_rssi_avg = 0;
 129         priv->data_nf_avg = 0;
 130         priv->data_nf_last = 0;
 131         priv->bcn_rssi_last = 0;
 132         priv->bcn_rssi_avg = 0;
 133         priv->bcn_nf_avg = 0;
 134         priv->bcn_nf_last = 0;
 135         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 136         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 137         priv->wpa_ie_len = 0;
 138         priv->wpa_is_gtk_set = false;
 139
 140         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 141         priv->assoc_tlv_buf_len = 0;
 142         memset(&priv->wps, 0, sizeof(priv->wps));
 143         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 144         priv->gen_ie_buf_len = 0;
 145         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 146
 147         priv->wmm_required = true;
 148         priv->wmm_enabled = false;
 149         priv->wmm_qosinfo = 0;
 150         priv->curr_bcn_buf = NULL;
 151         priv->curr_bcn_size = 0;
 152         priv->wps_ie = NULL;
 153         priv->wps_ie_len = 0;
 154         priv->ap_11n_enabled = 0;
 155         memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg));
 156
 157         priv->scan_block = false;
 158
 159         priv->csa_chan = 0;
 160         priv->csa_expire_time = 0;
 161         priv->del_list_idx = 0;
 162         priv->hs2_enabled = false;
 163         priv->check_tdls_tx = false;
 164         memcpy(priv->tos_to_tid_inv, tos_to_tid_inv, MAX_NUM_TID);
 165
 166         mwifiex_init_11h_params(priv);
 167
 168         return mwifiex_add_bss_prio_tbl(priv);
 169 }
 170
 171 /*
 172  * This function allocates buffers for members of the adapter
 173  * structure.
 174  *
 175  * The memory allocated includes scan table, command buffers, and
 176  * sleep confirm command buffer. In addition, the queues are
 177  * also initialized.
 178  */
 179 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 180 {
 181         int ret;
 182
 183         /* Allocate command buffer */
 184         ret = mwifiex_alloc_cmd_buffer(adapter);
 185         if (ret) {
 186                 mwifiex_dbg(adapter, ERROR,
 187                             "%s: failed to alloc cmd buffer\n",
 188                             __func__);
 189                 return -1;
 190         }
 191
 192         adapter->sleep_cfm =
 193                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 194                               + INTF_HEADER_LEN);
 195
 196         if (!adapter->sleep_cfm) {
 197                 mwifiex_dbg(adapter, ERROR,
 198                             "%s: failed to alloc sleep cfm\t"
 199                             " cmd buffer\n", __func__);
 200                 return -1;
 201         }
 202         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 203
 204         return 0;
 205 }
 206
 207 /*
 208  * This function initializes the adapter structure and sets default
 209  * values to the members of adapter.
 210  *
 211  * This also initializes the WMM related parameters in the driver private
 212  * structures.
 213  */
 214 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 215 {
 216         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 217
 218         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 219
 220         adapter->cmd_sent = false;
 221
 222         if (adapter->iface_type == MWIFIEX_SDIO)
 223                 adapter->data_sent = true;
 224         else
 225                 adapter->data_sent = false;
 226
 227         if (adapter->iface_type == MWIFIEX_USB)
 228                 adapter->intf_hdr_len = 0;
 229         else
 230                 adapter->intf_hdr_len = INTF_HEADER_LEN;
 231
 232         adapter->cmd_resp_received = false;
 233         adapter->event_received = false;
 234         adapter->data_received = false;
 235
 236         clear_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags);
 237
 238         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 239
 240         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 241         adapter->ps_state = PS_STATE_AWAKE;
 242         adapter->need_to_wakeup = false;
 243
 244         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 245         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 246         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 247         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 248         adapter->scan_chan_gap_time = MWIFIEX_DEF_SCAN_CHAN_GAP_TIME;
 249
 250         adapter->scan_probes = 1;
 251
 252         adapter->multiple_dtim = 1;
 253
 254         adapter->local_listen_interval = 0;     /* default value in firmware
 255                                                    will be used */
 256
 257         adapter->is_deep_sleep = false;
 258
 259         adapter->delay_null_pkt = false;
 260         adapter->delay_to_ps = 1000;
 261         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 262
 263         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 264                                            default */
 265         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 266                                            default */
 267         adapter->pm_wakeup_card_req = false;
 268
 269         adapter->pm_wakeup_fw_try = false;
 270
 271         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 272
 273         clear_bit(MWIFIEX_IS_HS_CONFIGURED, &adapter->work_flags);
 274         adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF);
 275         adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF;
 276         adapter->hs_cfg.gap = HS_CFG_GAP_DEF;
 277         adapter->hs_activated = false;
 278
 279         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 280         adapter->hw_dot_11n_dev_cap = 0;
 281         adapter->hw_dev_mcs_support = 0;
 282         adapter->sec_chan_offset = 0;
 283         adapter->adhoc_11n_enabled = false;
 284
 285         mwifiex_wmm_init(adapter);
 286         atomic_set(&adapter->tx_hw_pending, 0);
 287
 288         sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 289                                         adapter->sleep_cfm->data;
 290         memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 291         sleep_cfm_buf->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 292         sleep_cfm_buf->size = cpu_to_le16(adapter->sleep_cfm->len);
 293         sleep_cfm_buf->result = 0;
 294         sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 295         sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 296
 297         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 298         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 299         adapter->tx_lock_flag = false;
 300         adapter->null_pkt_interval = 0;
 301         adapter->fw_bands = 0;
 302         adapter->config_bands = 0;
 303         adapter->adhoc_start_band = 0;
 304         adapter->scan_channels = NULL;
 305         adapter->fw_release_number = 0;
 306         adapter->fw_cap_info = 0;
 307         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 308         adapter->event_cause = 0;
 309         adapter->region_code = 0;
 310         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 311         adapter->adhoc_awake_period = 0;
 312         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 313         adapter->arp_filter_size = 0;
 314         adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
 315         adapter->mfg_mode = mfg_mode;
 316         adapter->key_api_major_ver = 0;
 317         adapter->key_api_minor_ver = 0;
 318         eth_broadcast_addr(adapter->perm_addr);
 319         adapter->iface_limit.sta_intf = MWIFIEX_MAX_STA_NUM;
 320         adapter->iface_limit.uap_intf = MWIFIEX_MAX_UAP_NUM;
 321         adapter->iface_limit.p2p_intf = MWIFIEX_MAX_P2P_NUM;
 322         adapter->active_scan_triggered = false;
 323         timer_setup(&adapter->wakeup_timer, wakeup_timer_fn, 0);
 324         adapter->devdump_len = 0;
 325         INIT_DELAYED_WORK(&adapter->devdump_work, fw_dump_work);
 326 }
 327
 328 /*
 329  * This function sets trans_start per tx_queue
 330  */
 331 void mwifiex_set_trans_start(struct net_device *dev)
 332 {
 333         int i;
 334
 335         for (i = 0; i < dev->num_tx_queues; i++)
 336                 txq_trans_cond_update(netdev_get_tx_queue(dev, i));
 337
 338         netif_trans_update(dev);
 339 }
 340
 341 /*
 342  * This function wakes up all queues in net_device
 343  */
 344 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 345                                         struct mwifiex_adapter *adapter)
 346 {
 347         spin_lock_bh(&adapter->queue_lock);
 348         netif_tx_wake_all_queues(netdev);
 349         spin_unlock_bh(&adapter->queue_lock);
 350 }
 351
 352 /*
 353  * This function stops all queues in net_device
 354  */
 355 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 356                                         struct mwifiex_adapter *adapter)
 357 {
 358         spin_lock_bh(&adapter->queue_lock);
 359         netif_tx_stop_all_queues(netdev);
 360         spin_unlock_bh(&adapter->queue_lock);
 361 }
 362
 363 /*
 364  * This function invalidates the list heads.
 365  */
 366 static void mwifiex_invalidate_lists(struct mwifiex_adapter *adapter)
 367 {
 368         struct mwifiex_private *priv;
 369         s32 i, j;
 370
 371         list_del(&adapter->cmd_free_q);
 372         list_del(&adapter->cmd_pending_q);
 373         list_del(&adapter->scan_pending_q);
 374
 375         for (i = 0; i < adapter->priv_num; i++)
 376                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 377
 378         for (i = 0; i < adapter->priv_num; i++) {
 379                 if (adapter->priv[i]) {
 380                         priv = adapter->priv[i];
 381                         for (j = 0; j < MAX_NUM_TID; ++j)
 382                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 383                         list_del(&priv->tx_ba_stream_tbl_ptr);
 384                         list_del(&priv->rx_reorder_tbl_ptr);
 385                         list_del(&priv->sta_list);
 386                         list_del(&priv->auto_tdls_list);
 387                 }
 388         }
 389 }
 390
 391 /*
 392  * This function performs cleanup for adapter structure.
 393  *
 394  * The cleanup is done recursively, by canceling all pending
 395  * commands, freeing the member buffers previously allocated
 396  * (command buffers, scan table buffer, sleep confirm command
 397  * buffer), stopping the timers and calling the cleanup routines
 398  * for every interface.
 399  */
 400 static void
 401 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
 402 {
 403         del_timer(&adapter->wakeup_timer);
 404         cancel_delayed_work_sync(&adapter->devdump_work);
 405         mwifiex_cancel_all_pending_cmd(adapter);
 406         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 407         wake_up_interruptible(&adapter->hs_activate_wait_q);
 408 }
 409
 410 void mwifiex_free_cmd_buffers(struct mwifiex_adapter *adapter)
 411 {
 412         mwifiex_invalidate_lists(adapter);
 413
 414         /* Free command buffer */
 415         mwifiex_dbg(adapter, INFO, "info: free cmd buffer\n");
 416         mwifiex_free_cmd_buffer(adapter);
 417
 418         if (adapter->sleep_cfm)
 419                 dev_kfree_skb_any(adapter->sleep_cfm);
 420 }
 421
 422 /*
 423  *  This function intializes the lock variables and
 424  *  the list heads.
 425  */
 426 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 427 {
 428         struct mwifiex_private *priv;
 429         s32 i, j;
 430
 431         spin_lock_init(&adapter->int_lock);
 432         spin_lock_init(&adapter->main_proc_lock);
 433         spin_lock_init(&adapter->mwifiex_cmd_lock);
 434         spin_lock_init(&adapter->queue_lock);
 435         for (i = 0; i < adapter->priv_num; i++) {
 436                 if (adapter->priv[i]) {
 437                         priv = adapter->priv[i];
 438                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 439                         spin_lock_init(&priv->curr_bcn_buf_lock);
 440                         spin_lock_init(&priv->sta_list_spinlock);
 441                         spin_lock_init(&priv->auto_tdls_lock);
 442                 }
 443         }
 444
 445         /* Initialize cmd_free_q */
 446         INIT_LIST_HEAD(&adapter->cmd_free_q);
 447         /* Initialize cmd_pending_q */
 448         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 449         /* Initialize scan_pending_q */
 450         INIT_LIST_HEAD(&adapter->scan_pending_q);
 451
 452         spin_lock_init(&adapter->cmd_free_q_lock);
 453         spin_lock_init(&adapter->cmd_pending_q_lock);
 454         spin_lock_init(&adapter->scan_pending_q_lock);
 455         spin_lock_init(&adapter->rx_proc_lock);
 456
 457         skb_queue_head_init(&adapter->rx_data_q);
 458         skb_queue_head_init(&adapter->tx_data_q);
 459
 460         for (i = 0; i < adapter->priv_num; ++i) {
 461                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 462                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 463         }
 464
 465         for (i = 0; i < adapter->priv_num; i++) {
 466                 if (!adapter->priv[i])
 467                         continue;
 468                 priv = adapter->priv[i];
 469                 for (j = 0; j < MAX_NUM_TID; ++j)
 470                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 471                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 472                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 473                 INIT_LIST_HEAD(&priv->sta_list);
 474                 INIT_LIST_HEAD(&priv->auto_tdls_list);
 475                 skb_queue_head_init(&priv->tdls_txq);
 476                 skb_queue_head_init(&priv->bypass_txq);
 477
 478                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 479                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 480
 481                 spin_lock_init(&priv->ack_status_lock);
 482                 idr_init(&priv->ack_status_frames);
 483         }
 484
 485         return 0;
 486 }
 487
 488 /*
 489  * This function initializes the firmware.
 490  *
 491  * The following operations are performed sequentially -
 492  *      - Allocate adapter structure
 493  *      - Initialize the adapter structure
 494  *      - Initialize the private structure
 495  *      - Add BSS priority tables to the adapter structure
 496  *      - For each interface, send the init commands to firmware
 497  *      - Send the first command in command pending queue, if available
 498  */
 499 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 500 {
 501         int ret;
 502         struct mwifiex_private *priv;
 503         u8 i, first_sta = true;
 504         int is_cmd_pend_q_empty;
 505
 506         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 507
 508         /* Allocate memory for member of adapter structure */
 509         ret = mwifiex_allocate_adapter(adapter);
 510         if (ret)
 511                 return -1;
 512
 513         /* Initialize adapter structure */
 514         mwifiex_init_adapter(adapter);
 515
 516         for (i = 0; i < adapter->priv_num; i++) {
 517                 if (adapter->priv[i]) {
 518                         priv = adapter->priv[i];
 519
 520                         /* Initialize private structure */
 521                         ret = mwifiex_init_priv(priv);
 522                         if (ret)
 523                                 return -1;
 524                 }
 525         }
 526         if (adapter->mfg_mode) {
 527                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 528                 ret = -EINPROGRESS;
 529         } else {
 530                 for (i = 0; i < adapter->priv_num; i++) {
 531                         if (adapter->priv[i]) {
 532                                 ret = mwifiex_sta_init_cmd(adapter->priv[i],
 533                                                            first_sta, true);
 534                                 if (ret == -1)
 535                                         return -1;
 536
 537                                 first_sta = false;
 538                         }
 539
 540
 541
 542                 }
 543         }
 544
 545         spin_lock_bh(&adapter->cmd_pending_q_lock);
 546         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 547         spin_unlock_bh(&adapter->cmd_pending_q_lock);
 548         if (!is_cmd_pend_q_empty) {
 549                 /* Send the first command in queue and return */
 550                 if (mwifiex_main_process(adapter) != -1)
 551                         ret = -EINPROGRESS;
 552         } else {
 553                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 554         }
 555
 556         return ret;
 557 }
 558
 559 /*
 560  * This function deletes the BSS priority tables.
 561  *
 562  * The function traverses through all the allocated BSS priority nodes
 563  * in every BSS priority table and frees them.
 564  */
 565 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 566 {
 567         int i;
 568         struct mwifiex_adapter *adapter = priv->adapter;
 569         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
 570         struct list_head *head;
 571         spinlock_t *lock; /* bss priority lock */
 572
 573         for (i = 0; i < adapter->priv_num; ++i) {
 574                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 575                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 576                 mwifiex_dbg(adapter, INFO,
 577                             "info: delete BSS priority table,\t"
 578                             "bss_type = %d, bss_num = %d, i = %d,\t"
 579                             "head = %p\n",
 580                             priv->bss_type, priv->bss_num, i, head);
 581
 582                 {
 583                         spin_lock_bh(lock);
 584                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 585                                                  list) {
 586                                 if (bssprio_node->priv == priv) {
 587                                         mwifiex_dbg(adapter, INFO,
 588                                                     "info: Delete\t"
 589                                                     "node %p, next = %p\n",
 590                                                     bssprio_node, tmp_node);
 591                                         list_del(&bssprio_node->list);
 592                                         kfree(bssprio_node);
 593                                 }
 594                         }
 595                         spin_unlock_bh(lock);
 596                 }
 597         }
 598 }
 599
 600 /*
 601  * This function frees the private structure, including cleans
 602  * up the TX and RX queues and frees the BSS priority tables.
 603  */
 604 void mwifiex_free_priv(struct mwifiex_private *priv)
 605 {
 606         mwifiex_clean_txrx(priv);
 607         mwifiex_delete_bss_prio_tbl(priv);
 608         mwifiex_free_curr_bcn(priv);
 609 }
 610
 611 /*
 612  * This function is used to shutdown the driver.
 613  *
 614  * The following operations are performed sequentially -
 615  *      - Check if already shut down
 616  *      - Make sure the main process has stopped
 617  *      - Clean up the Tx and Rx queues
 618  *      - Delete BSS priority tables
 619  *      - Free the adapter
 620  *      - Notify completion
 621  */
 622 void
 623 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 624 {
 625         struct mwifiex_private *priv;
 626         s32 i;
 627         struct sk_buff *skb;
 628
 629         /* mwifiex already shutdown */
 630         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 631                 return;
 632
 633         /* cancel current command */
 634         if (adapter->curr_cmd) {
 635                 mwifiex_dbg(adapter, WARN,
 636                             "curr_cmd is still in processing\n");
 637                 del_timer_sync(&adapter->cmd_timer);
 638                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 639                 adapter->curr_cmd = NULL;
 640         }
 641
 642         /* shut down mwifiex */
 643         mwifiex_dbg(adapter, MSG,
 644                     "info: shutdown mwifiex...\n");
 645
 646         /* Clean up Tx/Rx queues and delete BSS priority table */
 647         for (i = 0; i < adapter->priv_num; i++) {
 648                 if (adapter->priv[i]) {
 649                         priv = adapter->priv[i];
 650
 651                         mwifiex_clean_auto_tdls(priv);
 652                         mwifiex_abort_cac(priv);
 653                         mwifiex_free_priv(priv);
 654                 }
 655         }
 656
 657         atomic_set(&adapter->tx_queued, 0);
 658         while ((skb = skb_dequeue(&adapter->tx_data_q)))
 659                 mwifiex_write_data_complete(adapter, skb, 0, 0);
 660
 661         spin_lock_bh(&adapter->rx_proc_lock);
 662
 663         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 664                 struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 665
 666                 atomic_dec(&adapter->rx_pending);
 667                 priv = adapter->priv[rx_info->bss_num];
 668                 if (priv)
 669                         priv->stats.rx_dropped++;
 670
 671                 dev_kfree_skb_any(skb);
 672         }
 673
 674         spin_unlock_bh(&adapter->rx_proc_lock);
 675
 676         mwifiex_adapter_cleanup(adapter);
 677
 678         adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY;
 679 }
 680
 681 /*
 682  * This function downloads the firmware to the card.
 683  *
 684  * The actual download is preceded by two sanity checks -
 685  *      - Check if firmware is already running
 686  *      - Check if the interface is the winner to download the firmware
 687  *
 688  * ...and followed by another -
 689  *      - Check if the firmware is downloaded successfully
 690  *
 691  * After download is successfully completed, the host interrupts are enabled.
 692  */
 693 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 694                     struct mwifiex_fw_image *pmfw)
 695 {
 696         int ret;
 697         u32 poll_num = 1;
 698
 699         /* check if firmware is already running */
 700         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 701         if (!ret) {
 702                 mwifiex_dbg(adapter, MSG,
 703                             "WLAN FW already running! Skip FW dnld\n");
 704                 return 0;
 705         }
 706
 707         /* check if we are the winner for downloading FW */
 708         if (adapter->if_ops.check_winner_status) {
 709                 adapter->winner = 0;
 710                 ret = adapter->if_ops.check_winner_status(adapter);
 711
 712                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 713                 if (ret) {
 714                         mwifiex_dbg(adapter, MSG,
 715                                     "WLAN read winner status failed!\n");
 716                         return ret;
 717                 }
 718
 719                 if (!adapter->winner) {
 720                         mwifiex_dbg(adapter, MSG,
 721                                     "WLAN is not the winner! Skip FW dnld\n");
 722                         goto poll_fw;
 723                 }
 724         }
 725
 726         if (pmfw) {
 727                 /* Download firmware with helper */
 728                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 729                 if (ret) {
 730                         mwifiex_dbg(adapter, ERROR,
 731                                     "prog_fw failed ret=%#x\n", ret);
 732                         return ret;
 733                 }
 734         }
 735
 736 poll_fw:
 737         /* Check if the firmware is downloaded successfully or not */
 738         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 739         if (ret)
 740                 mwifiex_dbg(adapter, ERROR,
 741                             "FW failed to be active in time\n");
 742
 743         return ret;
 744 }
 745 EXPORT_SYMBOL_GPL(mwifiex_dnld_fw);