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0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * NXP Wireless LAN device driver: HW/FW Initialization
0004  *
0005  * Copyright 2011-2020 NXP
0006  */
0007 
0008 #include "decl.h"
0009 #include "ioctl.h"
0010 #include "util.h"
0011 #include "fw.h"
0012 #include "main.h"
0013 #include "wmm.h"
0014 #include "11n.h"
0015 
0016 /*
0017  * This function adds a BSS priority table to the table list.
0018  *
0019  * The function allocates a new BSS priority table node and adds it to
0020  * the end of BSS priority table list, kept in driver memory.
0021  */
0022 static int mwifiex_add_bss_prio_tbl(struct mwifiex_private *priv)
0023 {
0024     struct mwifiex_adapter *adapter = priv->adapter;
0025     struct mwifiex_bss_prio_node *bss_prio;
0026     struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
0027 
0028     bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
0029     if (!bss_prio)
0030         return -ENOMEM;
0031 
0032     bss_prio->priv = priv;
0033     INIT_LIST_HEAD(&bss_prio->list);
0034 
0035     spin_lock_bh(&tbl[priv->bss_priority].bss_prio_lock);
0036     list_add_tail(&bss_prio->list, &tbl[priv->bss_priority].bss_prio_head);
0037     spin_unlock_bh(&tbl[priv->bss_priority].bss_prio_lock);
0038 
0039     return 0;
0040 }
0041 
0042 static void wakeup_timer_fn(struct timer_list *t)
0043 {
0044     struct mwifiex_adapter *adapter = from_timer(adapter, t, wakeup_timer);
0045 
0046     mwifiex_dbg(adapter, ERROR, "Firmware wakeup failed\n");
0047     adapter->hw_status = MWIFIEX_HW_STATUS_RESET;
0048     mwifiex_cancel_all_pending_cmd(adapter);
0049 
0050     if (adapter->if_ops.card_reset)
0051         adapter->if_ops.card_reset(adapter);
0052 }
0053 
0054 static void fw_dump_timer_fn(struct timer_list *t)
0055 {
0056     struct mwifiex_adapter *adapter = from_timer(adapter, t, devdump_timer);
0057 
0058     mwifiex_upload_device_dump(adapter);
0059 }
0060 
0061 /*
0062  * This function initializes the private structure and sets default
0063  * values to the members.
0064  *
0065  * Additionally, it also initializes all the locks and sets up all the
0066  * lists.
0067  */
0068 int mwifiex_init_priv(struct mwifiex_private *priv)
0069 {
0070     u32 i;
0071 
0072     priv->media_connected = false;
0073     eth_broadcast_addr(priv->curr_addr);
0074     priv->port_open = false;
0075     priv->usb_port = MWIFIEX_USB_EP_DATA;
0076     priv->pkt_tx_ctrl = 0;
0077     priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
0078     priv->data_rate = 0;    /* Initially indicate the rate as auto */
0079     priv->is_data_rate_auto = true;
0080     priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
0081     priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
0082 
0083     priv->sec_info.wep_enabled = 0;
0084     priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
0085     priv->sec_info.encryption_mode = 0;
0086     for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
0087         memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
0088     priv->wep_key_curr_index = 0;
0089     priv->curr_pkt_filter = HostCmd_ACT_MAC_DYNAMIC_BW_ENABLE |
0090                 HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
0091                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
0092 
0093     priv->beacon_period = 100; /* beacon interval */
0094     priv->attempted_bss_desc = NULL;
0095     memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
0096     priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
0097 
0098     memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
0099     memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
0100     memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
0101     priv->assoc_rsp_size = 0;
0102     priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
0103     priv->atim_window = 0;
0104     priv->adhoc_state = ADHOC_IDLE;
0105     priv->tx_power_level = 0;
0106     priv->max_tx_power_level = 0;
0107     priv->min_tx_power_level = 0;
0108     priv->tx_ant = 0;
0109     priv->rx_ant = 0;
0110     priv->tx_rate = 0;
0111     priv->rxpd_htinfo = 0;
0112     priv->rxpd_rate = 0;
0113     priv->rate_bitmap = 0;
0114     priv->data_rssi_last = 0;
0115     priv->data_rssi_avg = 0;
0116     priv->data_nf_avg = 0;
0117     priv->data_nf_last = 0;
0118     priv->bcn_rssi_last = 0;
0119     priv->bcn_rssi_avg = 0;
0120     priv->bcn_nf_avg = 0;
0121     priv->bcn_nf_last = 0;
0122     memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
0123     memset(&priv->aes_key, 0, sizeof(priv->aes_key));
0124     priv->wpa_ie_len = 0;
0125     priv->wpa_is_gtk_set = false;
0126 
0127     memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
0128     priv->assoc_tlv_buf_len = 0;
0129     memset(&priv->wps, 0, sizeof(priv->wps));
0130     memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
0131     priv->gen_ie_buf_len = 0;
0132     memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
0133 
0134     priv->wmm_required = true;
0135     priv->wmm_enabled = false;
0136     priv->wmm_qosinfo = 0;
0137     priv->curr_bcn_buf = NULL;
0138     priv->curr_bcn_size = 0;
0139     priv->wps_ie = NULL;
0140     priv->wps_ie_len = 0;
0141     priv->ap_11n_enabled = 0;
0142     memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg));
0143 
0144     priv->scan_block = false;
0145 
0146     priv->csa_chan = 0;
0147     priv->csa_expire_time = 0;
0148     priv->del_list_idx = 0;
0149     priv->hs2_enabled = false;
0150     priv->check_tdls_tx = false;
0151     memcpy(priv->tos_to_tid_inv, tos_to_tid_inv, MAX_NUM_TID);
0152 
0153     mwifiex_init_11h_params(priv);
0154 
0155     return mwifiex_add_bss_prio_tbl(priv);
0156 }
0157 
0158 /*
0159  * This function allocates buffers for members of the adapter
0160  * structure.
0161  *
0162  * The memory allocated includes scan table, command buffers, and
0163  * sleep confirm command buffer. In addition, the queues are
0164  * also initialized.
0165  */
0166 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
0167 {
0168     int ret;
0169 
0170     /* Allocate command buffer */
0171     ret = mwifiex_alloc_cmd_buffer(adapter);
0172     if (ret) {
0173         mwifiex_dbg(adapter, ERROR,
0174                 "%s: failed to alloc cmd buffer\n",
0175                 __func__);
0176         return -1;
0177     }
0178 
0179     adapter->sleep_cfm =
0180         dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
0181                   + INTF_HEADER_LEN);
0182 
0183     if (!adapter->sleep_cfm) {
0184         mwifiex_dbg(adapter, ERROR,
0185                 "%s: failed to alloc sleep cfm\t"
0186                 " cmd buffer\n", __func__);
0187         return -1;
0188     }
0189     skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
0190 
0191     return 0;
0192 }
0193 
0194 /*
0195  * This function initializes the adapter structure and sets default
0196  * values to the members of adapter.
0197  *
0198  * This also initializes the WMM related parameters in the driver private
0199  * structures.
0200  */
0201 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
0202 {
0203     struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
0204 
0205     skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
0206 
0207     adapter->cmd_sent = false;
0208 
0209     if (adapter->iface_type == MWIFIEX_SDIO)
0210         adapter->data_sent = true;
0211     else
0212         adapter->data_sent = false;
0213 
0214     if (adapter->iface_type == MWIFIEX_USB)
0215         adapter->intf_hdr_len = 0;
0216     else
0217         adapter->intf_hdr_len = INTF_HEADER_LEN;
0218 
0219     adapter->cmd_resp_received = false;
0220     adapter->event_received = false;
0221     adapter->data_received = false;
0222 
0223     clear_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags);
0224 
0225     adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
0226 
0227     adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
0228     adapter->ps_state = PS_STATE_AWAKE;
0229     adapter->need_to_wakeup = false;
0230 
0231     adapter->scan_mode = HostCmd_BSS_MODE_ANY;
0232     adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
0233     adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
0234     adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
0235     adapter->scan_chan_gap_time = MWIFIEX_DEF_SCAN_CHAN_GAP_TIME;
0236 
0237     adapter->scan_probes = 1;
0238 
0239     adapter->multiple_dtim = 1;
0240 
0241     adapter->local_listen_interval = 0; /* default value in firmware
0242                            will be used */
0243 
0244     adapter->is_deep_sleep = false;
0245 
0246     adapter->delay_null_pkt = false;
0247     adapter->delay_to_ps = 1000;
0248     adapter->enhanced_ps_mode = PS_MODE_AUTO;
0249 
0250     adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
0251                        default */
0252     adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
0253                        default */
0254     adapter->pm_wakeup_card_req = false;
0255 
0256     adapter->pm_wakeup_fw_try = false;
0257 
0258     adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
0259 
0260     clear_bit(MWIFIEX_IS_HS_CONFIGURED, &adapter->work_flags);
0261     adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF);
0262     adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF;
0263     adapter->hs_cfg.gap = HS_CFG_GAP_DEF;
0264     adapter->hs_activated = false;
0265 
0266     memset(adapter->event_body, 0, sizeof(adapter->event_body));
0267     adapter->hw_dot_11n_dev_cap = 0;
0268     adapter->hw_dev_mcs_support = 0;
0269     adapter->sec_chan_offset = 0;
0270     adapter->adhoc_11n_enabled = false;
0271 
0272     mwifiex_wmm_init(adapter);
0273     atomic_set(&adapter->tx_hw_pending, 0);
0274 
0275     sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
0276                     adapter->sleep_cfm->data;
0277     memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
0278     sleep_cfm_buf->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
0279     sleep_cfm_buf->size = cpu_to_le16(adapter->sleep_cfm->len);
0280     sleep_cfm_buf->result = 0;
0281     sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
0282     sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
0283 
0284     memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
0285     memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
0286     adapter->tx_lock_flag = false;
0287     adapter->null_pkt_interval = 0;
0288     adapter->fw_bands = 0;
0289     adapter->config_bands = 0;
0290     adapter->adhoc_start_band = 0;
0291     adapter->scan_channels = NULL;
0292     adapter->fw_release_number = 0;
0293     adapter->fw_cap_info = 0;
0294     memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
0295     adapter->event_cause = 0;
0296     adapter->region_code = 0;
0297     adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
0298     adapter->adhoc_awake_period = 0;
0299     memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
0300     adapter->arp_filter_size = 0;
0301     adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
0302     adapter->mfg_mode = mfg_mode;
0303     adapter->key_api_major_ver = 0;
0304     adapter->key_api_minor_ver = 0;
0305     eth_broadcast_addr(adapter->perm_addr);
0306     adapter->iface_limit.sta_intf = MWIFIEX_MAX_STA_NUM;
0307     adapter->iface_limit.uap_intf = MWIFIEX_MAX_UAP_NUM;
0308     adapter->iface_limit.p2p_intf = MWIFIEX_MAX_P2P_NUM;
0309     adapter->active_scan_triggered = false;
0310     timer_setup(&adapter->wakeup_timer, wakeup_timer_fn, 0);
0311     adapter->devdump_len = 0;
0312     timer_setup(&adapter->devdump_timer, fw_dump_timer_fn, 0);
0313 }
0314 
0315 /*
0316  * This function sets trans_start per tx_queue
0317  */
0318 void mwifiex_set_trans_start(struct net_device *dev)
0319 {
0320     int i;
0321 
0322     for (i = 0; i < dev->num_tx_queues; i++)
0323         txq_trans_cond_update(netdev_get_tx_queue(dev, i));
0324 
0325     netif_trans_update(dev);
0326 }
0327 
0328 /*
0329  * This function wakes up all queues in net_device
0330  */
0331 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
0332                     struct mwifiex_adapter *adapter)
0333 {
0334     spin_lock_bh(&adapter->queue_lock);
0335     netif_tx_wake_all_queues(netdev);
0336     spin_unlock_bh(&adapter->queue_lock);
0337 }
0338 
0339 /*
0340  * This function stops all queues in net_device
0341  */
0342 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
0343                     struct mwifiex_adapter *adapter)
0344 {
0345     spin_lock_bh(&adapter->queue_lock);
0346     netif_tx_stop_all_queues(netdev);
0347     spin_unlock_bh(&adapter->queue_lock);
0348 }
0349 
0350 /*
0351  * This function invalidates the list heads.
0352  */
0353 static void mwifiex_invalidate_lists(struct mwifiex_adapter *adapter)
0354 {
0355     struct mwifiex_private *priv;
0356     s32 i, j;
0357 
0358     list_del(&adapter->cmd_free_q);
0359     list_del(&adapter->cmd_pending_q);
0360     list_del(&adapter->scan_pending_q);
0361 
0362     for (i = 0; i < adapter->priv_num; i++)
0363         list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
0364 
0365     for (i = 0; i < adapter->priv_num; i++) {
0366         if (adapter->priv[i]) {
0367             priv = adapter->priv[i];
0368             for (j = 0; j < MAX_NUM_TID; ++j)
0369                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
0370             list_del(&priv->tx_ba_stream_tbl_ptr);
0371             list_del(&priv->rx_reorder_tbl_ptr);
0372             list_del(&priv->sta_list);
0373             list_del(&priv->auto_tdls_list);
0374         }
0375     }
0376 }
0377 
0378 /*
0379  * This function performs cleanup for adapter structure.
0380  *
0381  * The cleanup is done recursively, by canceling all pending
0382  * commands, freeing the member buffers previously allocated
0383  * (command buffers, scan table buffer, sleep confirm command
0384  * buffer), stopping the timers and calling the cleanup routines
0385  * for every interface.
0386  */
0387 static void
0388 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
0389 {
0390     del_timer(&adapter->wakeup_timer);
0391     del_timer_sync(&adapter->devdump_timer);
0392     mwifiex_cancel_all_pending_cmd(adapter);
0393     wake_up_interruptible(&adapter->cmd_wait_q.wait);
0394     wake_up_interruptible(&adapter->hs_activate_wait_q);
0395 }
0396 
0397 void mwifiex_free_cmd_buffers(struct mwifiex_adapter *adapter)
0398 {
0399     mwifiex_invalidate_lists(adapter);
0400 
0401     /* Free command buffer */
0402     mwifiex_dbg(adapter, INFO, "info: free cmd buffer\n");
0403     mwifiex_free_cmd_buffer(adapter);
0404 
0405     if (adapter->sleep_cfm)
0406         dev_kfree_skb_any(adapter->sleep_cfm);
0407 }
0408 
0409 /*
0410  *  This function intializes the lock variables and
0411  *  the list heads.
0412  */
0413 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
0414 {
0415     struct mwifiex_private *priv;
0416     s32 i, j;
0417 
0418     spin_lock_init(&adapter->int_lock);
0419     spin_lock_init(&adapter->main_proc_lock);
0420     spin_lock_init(&adapter->mwifiex_cmd_lock);
0421     spin_lock_init(&adapter->queue_lock);
0422     for (i = 0; i < adapter->priv_num; i++) {
0423         if (adapter->priv[i]) {
0424             priv = adapter->priv[i];
0425             spin_lock_init(&priv->wmm.ra_list_spinlock);
0426             spin_lock_init(&priv->curr_bcn_buf_lock);
0427             spin_lock_init(&priv->sta_list_spinlock);
0428             spin_lock_init(&priv->auto_tdls_lock);
0429         }
0430     }
0431 
0432     /* Initialize cmd_free_q */
0433     INIT_LIST_HEAD(&adapter->cmd_free_q);
0434     /* Initialize cmd_pending_q */
0435     INIT_LIST_HEAD(&adapter->cmd_pending_q);
0436     /* Initialize scan_pending_q */
0437     INIT_LIST_HEAD(&adapter->scan_pending_q);
0438 
0439     spin_lock_init(&adapter->cmd_free_q_lock);
0440     spin_lock_init(&adapter->cmd_pending_q_lock);
0441     spin_lock_init(&adapter->scan_pending_q_lock);
0442     spin_lock_init(&adapter->rx_proc_lock);
0443 
0444     skb_queue_head_init(&adapter->rx_data_q);
0445     skb_queue_head_init(&adapter->tx_data_q);
0446 
0447     for (i = 0; i < adapter->priv_num; ++i) {
0448         INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
0449         spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
0450     }
0451 
0452     for (i = 0; i < adapter->priv_num; i++) {
0453         if (!adapter->priv[i])
0454             continue;
0455         priv = adapter->priv[i];
0456         for (j = 0; j < MAX_NUM_TID; ++j)
0457             INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
0458         INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
0459         INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
0460         INIT_LIST_HEAD(&priv->sta_list);
0461         INIT_LIST_HEAD(&priv->auto_tdls_list);
0462         skb_queue_head_init(&priv->tdls_txq);
0463         skb_queue_head_init(&priv->bypass_txq);
0464 
0465         spin_lock_init(&priv->tx_ba_stream_tbl_lock);
0466         spin_lock_init(&priv->rx_reorder_tbl_lock);
0467 
0468         spin_lock_init(&priv->ack_status_lock);
0469         idr_init(&priv->ack_status_frames);
0470     }
0471 
0472     return 0;
0473 }
0474 
0475 /*
0476  * This function initializes the firmware.
0477  *
0478  * The following operations are performed sequentially -
0479  *      - Allocate adapter structure
0480  *      - Initialize the adapter structure
0481  *      - Initialize the private structure
0482  *      - Add BSS priority tables to the adapter structure
0483  *      - For each interface, send the init commands to firmware
0484  *      - Send the first command in command pending queue, if available
0485  */
0486 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
0487 {
0488     int ret;
0489     struct mwifiex_private *priv;
0490     u8 i, first_sta = true;
0491     int is_cmd_pend_q_empty;
0492 
0493     adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
0494 
0495     /* Allocate memory for member of adapter structure */
0496     ret = mwifiex_allocate_adapter(adapter);
0497     if (ret)
0498         return -1;
0499 
0500     /* Initialize adapter structure */
0501     mwifiex_init_adapter(adapter);
0502 
0503     for (i = 0; i < adapter->priv_num; i++) {
0504         if (adapter->priv[i]) {
0505             priv = adapter->priv[i];
0506 
0507             /* Initialize private structure */
0508             ret = mwifiex_init_priv(priv);
0509             if (ret)
0510                 return -1;
0511         }
0512     }
0513     if (adapter->mfg_mode) {
0514         adapter->hw_status = MWIFIEX_HW_STATUS_READY;
0515         ret = -EINPROGRESS;
0516     } else {
0517         for (i = 0; i < adapter->priv_num; i++) {
0518             if (adapter->priv[i]) {
0519                 ret = mwifiex_sta_init_cmd(adapter->priv[i],
0520                                first_sta, true);
0521                 if (ret == -1)
0522                     return -1;
0523 
0524                 first_sta = false;
0525             }
0526 
0527 
0528 
0529         }
0530     }
0531 
0532     spin_lock_bh(&adapter->cmd_pending_q_lock);
0533     is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
0534     spin_unlock_bh(&adapter->cmd_pending_q_lock);
0535     if (!is_cmd_pend_q_empty) {
0536         /* Send the first command in queue and return */
0537         if (mwifiex_main_process(adapter) != -1)
0538             ret = -EINPROGRESS;
0539     } else {
0540         adapter->hw_status = MWIFIEX_HW_STATUS_READY;
0541     }
0542 
0543     return ret;
0544 }
0545 
0546 /*
0547  * This function deletes the BSS priority tables.
0548  *
0549  * The function traverses through all the allocated BSS priority nodes
0550  * in every BSS priority table and frees them.
0551  */
0552 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
0553 {
0554     int i;
0555     struct mwifiex_adapter *adapter = priv->adapter;
0556     struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
0557     struct list_head *head;
0558     spinlock_t *lock; /* bss priority lock */
0559 
0560     for (i = 0; i < adapter->priv_num; ++i) {
0561         head = &adapter->bss_prio_tbl[i].bss_prio_head;
0562         lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
0563         mwifiex_dbg(adapter, INFO,
0564                 "info: delete BSS priority table,\t"
0565                 "bss_type = %d, bss_num = %d, i = %d,\t"
0566                 "head = %p\n",
0567                 priv->bss_type, priv->bss_num, i, head);
0568 
0569         {
0570             spin_lock_bh(lock);
0571             list_for_each_entry_safe(bssprio_node, tmp_node, head,
0572                          list) {
0573                 if (bssprio_node->priv == priv) {
0574                     mwifiex_dbg(adapter, INFO,
0575                             "info: Delete\t"
0576                             "node %p, next = %p\n",
0577                             bssprio_node, tmp_node);
0578                     list_del(&bssprio_node->list);
0579                     kfree(bssprio_node);
0580                 }
0581             }
0582             spin_unlock_bh(lock);
0583         }
0584     }
0585 }
0586 
0587 /*
0588  * This function frees the private structure, including cleans
0589  * up the TX and RX queues and frees the BSS priority tables.
0590  */
0591 void mwifiex_free_priv(struct mwifiex_private *priv)
0592 {
0593     mwifiex_clean_txrx(priv);
0594     mwifiex_delete_bss_prio_tbl(priv);
0595     mwifiex_free_curr_bcn(priv);
0596 }
0597 
0598 /*
0599  * This function is used to shutdown the driver.
0600  *
0601  * The following operations are performed sequentially -
0602  *      - Check if already shut down
0603  *      - Make sure the main process has stopped
0604  *      - Clean up the Tx and Rx queues
0605  *      - Delete BSS priority tables
0606  *      - Free the adapter
0607  *      - Notify completion
0608  */
0609 void
0610 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
0611 {
0612     struct mwifiex_private *priv;
0613     s32 i;
0614     struct sk_buff *skb;
0615 
0616     /* mwifiex already shutdown */
0617     if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
0618         return;
0619 
0620     /* cancel current command */
0621     if (adapter->curr_cmd) {
0622         mwifiex_dbg(adapter, WARN,
0623                 "curr_cmd is still in processing\n");
0624         del_timer_sync(&adapter->cmd_timer);
0625         mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
0626         adapter->curr_cmd = NULL;
0627     }
0628 
0629     /* shut down mwifiex */
0630     mwifiex_dbg(adapter, MSG,
0631             "info: shutdown mwifiex...\n");
0632 
0633     /* Clean up Tx/Rx queues and delete BSS priority table */
0634     for (i = 0; i < adapter->priv_num; i++) {
0635         if (adapter->priv[i]) {
0636             priv = adapter->priv[i];
0637 
0638             mwifiex_clean_auto_tdls(priv);
0639             mwifiex_abort_cac(priv);
0640             mwifiex_free_priv(priv);
0641         }
0642     }
0643 
0644     atomic_set(&adapter->tx_queued, 0);
0645     while ((skb = skb_dequeue(&adapter->tx_data_q)))
0646         mwifiex_write_data_complete(adapter, skb, 0, 0);
0647 
0648     spin_lock_bh(&adapter->rx_proc_lock);
0649 
0650     while ((skb = skb_dequeue(&adapter->rx_data_q))) {
0651         struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
0652 
0653         atomic_dec(&adapter->rx_pending);
0654         priv = adapter->priv[rx_info->bss_num];
0655         if (priv)
0656             priv->stats.rx_dropped++;
0657 
0658         dev_kfree_skb_any(skb);
0659     }
0660 
0661     spin_unlock_bh(&adapter->rx_proc_lock);
0662 
0663     mwifiex_adapter_cleanup(adapter);
0664 
0665     adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY;
0666 }
0667 
0668 /*
0669  * This function downloads the firmware to the card.
0670  *
0671  * The actual download is preceded by two sanity checks -
0672  *      - Check if firmware is already running
0673  *      - Check if the interface is the winner to download the firmware
0674  *
0675  * ...and followed by another -
0676  *      - Check if the firmware is downloaded successfully
0677  *
0678  * After download is successfully completed, the host interrupts are enabled.
0679  */
0680 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
0681             struct mwifiex_fw_image *pmfw)
0682 {
0683     int ret;
0684     u32 poll_num = 1;
0685 
0686     /* check if firmware is already running */
0687     ret = adapter->if_ops.check_fw_status(adapter, poll_num);
0688     if (!ret) {
0689         mwifiex_dbg(adapter, MSG,
0690                 "WLAN FW already running! Skip FW dnld\n");
0691         return 0;
0692     }
0693 
0694     /* check if we are the winner for downloading FW */
0695     if (adapter->if_ops.check_winner_status) {
0696         adapter->winner = 0;
0697         ret = adapter->if_ops.check_winner_status(adapter);
0698 
0699         poll_num = MAX_FIRMWARE_POLL_TRIES;
0700         if (ret) {
0701             mwifiex_dbg(adapter, MSG,
0702                     "WLAN read winner status failed!\n");
0703             return ret;
0704         }
0705 
0706         if (!adapter->winner) {
0707             mwifiex_dbg(adapter, MSG,
0708                     "WLAN is not the winner! Skip FW dnld\n");
0709             goto poll_fw;
0710         }
0711     }
0712 
0713     if (pmfw) {
0714         /* Download firmware with helper */
0715         ret = adapter->if_ops.prog_fw(adapter, pmfw);
0716         if (ret) {
0717             mwifiex_dbg(adapter, ERROR,
0718                     "prog_fw failed ret=%#x\n", ret);
0719             return ret;
0720         }
0721     }
0722 
0723 poll_fw:
0724     /* Check if the firmware is downloaded successfully or not */
0725     ret = adapter->if_ops.check_fw_status(adapter, poll_num);
0726     if (ret)
0727         mwifiex_dbg(adapter, ERROR,
0728                 "FW failed to be active in time\n");
0729 
0730     return ret;
0731 }
0732 EXPORT_SYMBOL_GPL(mwifiex_dnld_fw);
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