drivers/net/wireless/mwifiex/init.c

   1 /*
   2  * Marvell Wireless LAN device driver: HW/FW Initialization
   3  *
   4  * Copyright (C) 2011-2014, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27
  28 /*
  29  * This function adds a BSS priority table to the table list.
  30  *
  31  * The function allocates a new BSS priority table node and adds it to
  32  * the end of BSS priority table list, kept in driver memory.
  33  */
  34 static int mwifiex_add_bss_prio_tbl(struct mwifiex_private *priv)
  35 {
  36         struct mwifiex_adapter *adapter = priv->adapter;
  37         struct mwifiex_bss_prio_node *bss_prio;
  38         struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
  39         unsigned long flags;
  40
  41         bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
  42         if (!bss_prio)
  43                 return -ENOMEM;
  44
  45         bss_prio->priv = priv;
  46         INIT_LIST_HEAD(&bss_prio->list);
  47
  48         spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags);
  49         list_add_tail(&bss_prio->list, &tbl[priv->bss_priority].bss_prio_head);
  50         spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags);
  51
  52         return 0;
  53 }
  54
  55 static void wakeup_timer_fn(unsigned long data)
  56 {
  57         struct mwifiex_adapter *adapter = (struct mwifiex_adapter *)data;
  58
  59         dev_err(adapter->dev, "Firmware wakeup failed\n");
  60         adapter->hw_status = MWIFIEX_HW_STATUS_RESET;
  61         mwifiex_cancel_all_pending_cmd(adapter);
  62
  63         if (adapter->if_ops.card_reset)
  64                 adapter->if_ops.card_reset(adapter);
  65 }
  66
  67 /*
  68  * This function initializes the private structure and sets default
  69  * values to the members.
  70  *
  71  * Additionally, it also initializes all the locks and sets up all the
  72  * lists.
  73  */
  74 int mwifiex_init_priv(struct mwifiex_private *priv)
  75 {
  76         u32 i;
  77
  78         priv->media_connected = false;
  79         memset(priv->curr_addr, 0xff, ETH_ALEN);
  80
  81         priv->pkt_tx_ctrl = 0;
  82         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
  83         priv->data_rate = 0;    /* Initially indicate the rate as auto */
  84         priv->is_data_rate_auto = true;
  85         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
  86         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
  87
  88         priv->sec_info.wep_enabled = 0;
  89         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
  90         priv->sec_info.encryption_mode = 0;
  91         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
  92                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
  93         priv->wep_key_curr_index = 0;
  94         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
  95                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
  96
  97         priv->beacon_period = 100; /* beacon interval */ ;
  98         priv->attempted_bss_desc = NULL;
  99         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 100         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 101
 102         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 103         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 104         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 105         priv->assoc_rsp_size = 0;
 106         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 107         priv->atim_window = 0;
 108         priv->adhoc_state = ADHOC_IDLE;
 109         priv->tx_power_level = 0;
 110         priv->max_tx_power_level = 0;
 111         priv->min_tx_power_level = 0;
 112         priv->tx_rate = 0;
 113         priv->rxpd_htinfo = 0;
 114         priv->rxpd_rate = 0;
 115         priv->rate_bitmap = 0;
 116         priv->data_rssi_last = 0;
 117         priv->data_rssi_avg = 0;
 118         priv->data_nf_avg = 0;
 119         priv->data_nf_last = 0;
 120         priv->bcn_rssi_last = 0;
 121         priv->bcn_rssi_avg = 0;
 122         priv->bcn_nf_avg = 0;
 123         priv->bcn_nf_last = 0;
 124         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 125         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 126         priv->wpa_ie_len = 0;
 127         priv->wpa_is_gtk_set = false;
 128
 129         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 130         priv->assoc_tlv_buf_len = 0;
 131         memset(&priv->wps, 0, sizeof(priv->wps));
 132         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 133         priv->gen_ie_buf_len = 0;
 134         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 135
 136         priv->wmm_required = true;
 137         priv->wmm_enabled = false;
 138         priv->wmm_qosinfo = 0;
 139         priv->curr_bcn_buf = NULL;
 140         priv->curr_bcn_size = 0;
 141         priv->wps_ie = NULL;
 142         priv->wps_ie_len = 0;
 143         priv->ap_11n_enabled = 0;
 144         memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg));
 145
 146         priv->scan_block = false;
 147
 148         priv->csa_chan = 0;
 149         priv->csa_expire_time = 0;
 150         priv->del_list_idx = 0;
 151         priv->hs2_enabled = false;
 152         priv->check_tdls_tx = false;
 153         memcpy(priv->tos_to_tid_inv, tos_to_tid_inv, MAX_NUM_TID);
 154
 155         mwifiex_init_11h_params(priv);
 156
 157         return mwifiex_add_bss_prio_tbl(priv);
 158 }
 159
 160 /*
 161  * This function allocates buffers for members of the adapter
 162  * structure.
 163  *
 164  * The memory allocated includes scan table, command buffers, and
 165  * sleep confirm command buffer. In addition, the queues are
 166  * also initialized.
 167  */
 168 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 169 {
 170         int ret;
 171
 172         /* Allocate command buffer */
 173         ret = mwifiex_alloc_cmd_buffer(adapter);
 174         if (ret) {
 175                 dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
 176                         __func__);
 177                 return -1;
 178         }
 179
 180         adapter->sleep_cfm =
 181                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 182                               + INTF_HEADER_LEN);
 183
 184         if (!adapter->sleep_cfm) {
 185                 dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
 186                         " cmd buffer\n", __func__);
 187                 return -1;
 188         }
 189         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 190
 191         return 0;
 192 }
 193
 194 /*
 195  * This function initializes the adapter structure and sets default
 196  * values to the members of adapter.
 197  *
 198  * This also initializes the WMM related parameters in the driver private
 199  * structures.
 200  */
 201 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 202 {
 203         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 204
 205         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 206
 207         adapter->cmd_sent = false;
 208
 209         if (adapter->iface_type == MWIFIEX_SDIO)
 210                 adapter->data_sent = true;
 211         else
 212                 adapter->data_sent = false;
 213
 214         adapter->cmd_resp_received = false;
 215         adapter->event_received = false;
 216         adapter->data_received = false;
 217
 218         adapter->surprise_removed = false;
 219
 220         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 221
 222         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 223         adapter->ps_state = PS_STATE_AWAKE;
 224         adapter->need_to_wakeup = false;
 225
 226         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 227         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 228         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 229         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 230         adapter->scan_chan_gap_time = MWIFIEX_DEF_SCAN_CHAN_GAP_TIME;
 231
 232         adapter->scan_probes = 1;
 233
 234         adapter->multiple_dtim = 1;
 235
 236         adapter->local_listen_interval = 0;     /* default value in firmware
 237                                                    will be used */
 238
 239         adapter->is_deep_sleep = false;
 240
 241         adapter->delay_null_pkt = false;
 242         adapter->delay_to_ps = 1000;
 243         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 244
 245         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 246                                            default */
 247         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 248                                            default */
 249         adapter->pm_wakeup_card_req = false;
 250
 251         adapter->pm_wakeup_fw_try = false;
 252
 253         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 254
 255         adapter->is_hs_configured = false;
 256         adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF);
 257         adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF;
 258         adapter->hs_cfg.gap = HS_CFG_GAP_DEF;
 259         adapter->hs_activated = false;
 260
 261         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 262         adapter->hw_dot_11n_dev_cap = 0;
 263         adapter->hw_dev_mcs_support = 0;
 264         adapter->sec_chan_offset = 0;
 265         adapter->adhoc_11n_enabled = false;
 266
 267         mwifiex_wmm_init(adapter);
 268
 269         if (adapter->sleep_cfm) {
 270                 sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 271                                                 adapter->sleep_cfm->data;
 272                 memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 273                 sleep_cfm_buf->command =
 274                                 cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 275                 sleep_cfm_buf->size =
 276                                 cpu_to_le16(adapter->sleep_cfm->len);
 277                 sleep_cfm_buf->result = 0;
 278                 sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 279                 sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 280         }
 281         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 282         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 283         adapter->tx_lock_flag = false;
 284         adapter->null_pkt_interval = 0;
 285         adapter->fw_bands = 0;
 286         adapter->config_bands = 0;
 287         adapter->adhoc_start_band = 0;
 288         adapter->scan_channels = NULL;
 289         adapter->fw_release_number = 0;
 290         adapter->fw_cap_info = 0;
 291         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 292         adapter->event_cause = 0;
 293         adapter->region_code = 0;
 294         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 295         adapter->adhoc_awake_period = 0;
 296         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 297         adapter->arp_filter_size = 0;
 298         adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
 299         adapter->ext_scan = false;
 300         adapter->key_api_major_ver = 0;
 301         adapter->key_api_minor_ver = 0;
 302         memset(adapter->perm_addr, 0xff, ETH_ALEN);
 303         adapter->iface_limit.sta_intf = MWIFIEX_MAX_STA_NUM;
 304         adapter->iface_limit.uap_intf = MWIFIEX_MAX_UAP_NUM;
 305         adapter->iface_limit.p2p_intf = MWIFIEX_MAX_P2P_NUM;
 306
 307         setup_timer(&adapter->wakeup_timer, wakeup_timer_fn,
 308                     (unsigned long)adapter);
 309 }
 310
 311 /*
 312  * This function sets trans_start per tx_queue
 313  */
 314 void mwifiex_set_trans_start(struct net_device *dev)
 315 {
 316         int i;
 317
 318         for (i = 0; i < dev->num_tx_queues; i++)
 319                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 320
 321         dev->trans_start = jiffies;
 322 }
 323
 324 /*
 325  * This function wakes up all queues in net_device
 326  */
 327 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 328                                         struct mwifiex_adapter *adapter)
 329 {
 330         unsigned long dev_queue_flags;
 331         unsigned int i;
 332
 333         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 334
 335         for (i = 0; i < netdev->num_tx_queues; i++) {
 336                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 337
 338                 if (netif_tx_queue_stopped(txq))
 339                         netif_tx_wake_queue(txq);
 340         }
 341
 342         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 343 }
 344
 345 /*
 346  * This function stops all queues in net_device
 347  */
 348 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 349                                         struct mwifiex_adapter *adapter)
 350 {
 351         unsigned long dev_queue_flags;
 352         unsigned int i;
 353
 354         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 355
 356         for (i = 0; i < netdev->num_tx_queues; i++) {
 357                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 358
 359                 if (!netif_tx_queue_stopped(txq))
 360                         netif_tx_stop_queue(txq);
 361         }
 362
 363         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 364 }
 365
 366 /*
 367  *  This function releases the lock variables and frees the locks and
 368  *  associated locks.
 369  */
 370 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 371 {
 372         struct mwifiex_private *priv;
 373         s32 i, j;
 374
 375         /* Free lists */
 376         list_del(&adapter->cmd_free_q);
 377         list_del(&adapter->cmd_pending_q);
 378         list_del(&adapter->scan_pending_q);
 379
 380         for (i = 0; i < adapter->priv_num; i++)
 381                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 382
 383         for (i = 0; i < adapter->priv_num; i++) {
 384                 if (adapter->priv[i]) {
 385                         priv = adapter->priv[i];
 386                         for (j = 0; j < MAX_NUM_TID; ++j)
 387                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 388                         list_del(&priv->tx_ba_stream_tbl_ptr);
 389                         list_del(&priv->rx_reorder_tbl_ptr);
 390                         list_del(&priv->sta_list);
 391                         list_del(&priv->auto_tdls_list);
 392                 }
 393         }
 394 }
 395
 396 /*
 397  * This function performs cleanup for adapter structure.
 398  *
 399  * The cleanup is done recursively, by canceling all pending
 400  * commands, freeing the member buffers previously allocated
 401  * (command buffers, scan table buffer, sleep confirm command
 402  * buffer), stopping the timers and calling the cleanup routines
 403  * for every interface.
 404  */
 405 static void
 406 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
 407 {
 408         int idx;
 409
 410         if (!adapter) {
 411                 pr_err("%s: adapter is NULL\n", __func__);
 412                 return;
 413         }
 414
 415         del_timer(&adapter->wakeup_timer);
 416         mwifiex_cancel_all_pending_cmd(adapter);
 417         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 418         wake_up_interruptible(&adapter->hs_activate_wait_q);
 419
 420         /* Free lock variables */
 421         mwifiex_free_lock_list(adapter);
 422
 423         /* Free command buffer */
 424         dev_dbg(adapter->dev, "info: free cmd buffer\n");
 425         mwifiex_free_cmd_buffer(adapter);
 426
 427         for (idx = 0; idx < adapter->num_mem_types; idx++) {
 428                 struct memory_type_mapping *entry =
 429                                 &adapter->mem_type_mapping_tbl[idx];
 430
 431                 if (entry->mem_ptr) {
 432                         vfree(entry->mem_ptr);
 433                         entry->mem_ptr = NULL;
 434                 }
 435                 entry->mem_size = 0;
 436         }
 437
 438         if (adapter->drv_info_dump) {
 439                 vfree(adapter->drv_info_dump);
 440                 adapter->drv_info_size = 0;
 441         }
 442
 443         if (adapter->sleep_cfm)
 444                 dev_kfree_skb_any(adapter->sleep_cfm);
 445 }
 446
 447 /*
 448  *  This function intializes the lock variables and
 449  *  the list heads.
 450  */
 451 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 452 {
 453         struct mwifiex_private *priv;
 454         s32 i, j;
 455
 456         spin_lock_init(&adapter->mwifiex_lock);
 457         spin_lock_init(&adapter->int_lock);
 458         spin_lock_init(&adapter->main_proc_lock);
 459         spin_lock_init(&adapter->mwifiex_cmd_lock);
 460         spin_lock_init(&adapter->queue_lock);
 461         for (i = 0; i < adapter->priv_num; i++) {
 462                 if (adapter->priv[i]) {
 463                         priv = adapter->priv[i];
 464                         spin_lock_init(&priv->rx_pkt_lock);
 465                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 466                         spin_lock_init(&priv->curr_bcn_buf_lock);
 467                         spin_lock_init(&priv->sta_list_spinlock);
 468                         spin_lock_init(&priv->auto_tdls_lock);
 469                 }
 470         }
 471
 472         /* Initialize cmd_free_q */
 473         INIT_LIST_HEAD(&adapter->cmd_free_q);
 474         /* Initialize cmd_pending_q */
 475         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 476         /* Initialize scan_pending_q */
 477         INIT_LIST_HEAD(&adapter->scan_pending_q);
 478
 479         spin_lock_init(&adapter->cmd_free_q_lock);
 480         spin_lock_init(&adapter->cmd_pending_q_lock);
 481         spin_lock_init(&adapter->scan_pending_q_lock);
 482         spin_lock_init(&adapter->rx_proc_lock);
 483
 484         skb_queue_head_init(&adapter->rx_data_q);
 485
 486         for (i = 0; i < adapter->priv_num; ++i) {
 487                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 488                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 489         }
 490
 491         for (i = 0; i < adapter->priv_num; i++) {
 492                 if (!adapter->priv[i])
 493                         continue;
 494                 priv = adapter->priv[i];
 495                 for (j = 0; j < MAX_NUM_TID; ++j)
 496                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 497                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 498                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 499                 INIT_LIST_HEAD(&priv->sta_list);
 500                 INIT_LIST_HEAD(&priv->auto_tdls_list);
 501                 skb_queue_head_init(&priv->tdls_txq);
 502
 503                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 504                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 505
 506                 spin_lock_init(&priv->ack_status_lock);
 507                 idr_init(&priv->ack_status_frames);
 508         }
 509
 510         return 0;
 511 }
 512
 513 /*
 514  * This function initializes the firmware.
 515  *
 516  * The following operations are performed sequentially -
 517  *      - Allocate adapter structure
 518  *      - Initialize the adapter structure
 519  *      - Initialize the private structure
 520  *      - Add BSS priority tables to the adapter structure
 521  *      - For each interface, send the init commands to firmware
 522  *      - Send the first command in command pending queue, if available
 523  */
 524 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 525 {
 526         int ret;
 527         struct mwifiex_private *priv;
 528         u8 i, first_sta = true;
 529         int is_cmd_pend_q_empty;
 530         unsigned long flags;
 531
 532         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 533
 534         /* Allocate memory for member of adapter structure */
 535         ret = mwifiex_allocate_adapter(adapter);
 536         if (ret)
 537                 return -1;
 538
 539         /* Initialize adapter structure */
 540         mwifiex_init_adapter(adapter);
 541
 542         for (i = 0; i < adapter->priv_num; i++) {
 543                 if (adapter->priv[i]) {
 544                         priv = adapter->priv[i];
 545
 546                         /* Initialize private structure */
 547                         ret = mwifiex_init_priv(priv);
 548                         if (ret)
 549                                 return -1;
 550                 }
 551         }
 552
 553         if (adapter->if_ops.init_fw_port) {
 554                 if (adapter->if_ops.init_fw_port(adapter))
 555                         return -1;
 556         }
 557
 558         for (i = 0; i < adapter->priv_num; i++) {
 559                 if (adapter->priv[i]) {
 560                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta,
 561                                                    true);
 562                         if (ret == -1)
 563                                 return -1;
 564
 565                         first_sta = false;
 566                 }
 567         }
 568
 569         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 570         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 571         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 572         if (!is_cmd_pend_q_empty) {
 573                 /* Send the first command in queue and return */
 574                 if (mwifiex_main_process(adapter) != -1)
 575                         ret = -EINPROGRESS;
 576         } else {
 577                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 578         }
 579
 580         return ret;
 581 }
 582
 583 /*
 584  * This function deletes the BSS priority tables.
 585  *
 586  * The function traverses through all the allocated BSS priority nodes
 587  * in every BSS priority table and frees them.
 588  */
 589 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 590 {
 591         int i;
 592         struct mwifiex_adapter *adapter = priv->adapter;
 593         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
 594         struct list_head *head;
 595         spinlock_t *lock; /* bss priority lock */
 596         unsigned long flags;
 597
 598         for (i = 0; i < adapter->priv_num; ++i) {
 599                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 600                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 601                 dev_dbg(adapter->dev, "info: delete BSS priority table,"
 602                                 " bss_type = %d, bss_num = %d, i = %d,"
 603                                 " head = %p\n",
 604                               priv->bss_type, priv->bss_num, i, head);
 605
 606                 {
 607                         spin_lock_irqsave(lock, flags);
 608                         if (list_empty(head)) {
 609                                 spin_unlock_irqrestore(lock, flags);
 610                                 continue;
 611                         }
 612                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 613                                                  list) {
 614                                 if (bssprio_node->priv == priv) {
 615                                         dev_dbg(adapter->dev, "info: Delete "
 616                                                 "node %p, next = %p\n",
 617                                                 bssprio_node, tmp_node);
 618                                         list_del(&bssprio_node->list);
 619                                         kfree(bssprio_node);
 620                                 }
 621                         }
 622                         spin_unlock_irqrestore(lock, flags);
 623                 }
 624         }
 625 }
 626
 627 /*
 628  * This function frees the private structure, including cleans
 629  * up the TX and RX queues and frees the BSS priority tables.
 630  */
 631 void mwifiex_free_priv(struct mwifiex_private *priv)
 632 {
 633         mwifiex_clean_txrx(priv);
 634         mwifiex_delete_bss_prio_tbl(priv);
 635         mwifiex_free_curr_bcn(priv);
 636 }
 637
 638 /*
 639  * This function is used to shutdown the driver.
 640  *
 641  * The following operations are performed sequentially -
 642  *      - Check if already shut down
 643  *      - Make sure the main process has stopped
 644  *      - Clean up the Tx and Rx queues
 645  *      - Delete BSS priority tables
 646  *      - Free the adapter
 647  *      - Notify completion
 648  */
 649 int
 650 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 651 {
 652         int ret = -EINPROGRESS;
 653         struct mwifiex_private *priv;
 654         s32 i;
 655         unsigned long flags;
 656         struct sk_buff *skb;
 657
 658         /* mwifiex already shutdown */
 659         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 660                 return 0;
 661
 662         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 663         /* wait for mwifiex_process to complete */
 664         if (adapter->mwifiex_processing) {
 665                 dev_warn(adapter->dev, "main process is still running\n");
 666                 return ret;
 667         }
 668
 669         /* cancel current command */
 670         if (adapter->curr_cmd) {
 671                 dev_warn(adapter->dev, "curr_cmd is still in processing\n");
 672                 del_timer_sync(&adapter->cmd_timer);
 673                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 674                 adapter->curr_cmd = NULL;
 675         }
 676
 677         /* shut down mwifiex */
 678         dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");
 679
 680         /* Clean up Tx/Rx queues and delete BSS priority table */
 681         for (i = 0; i < adapter->priv_num; i++) {
 682                 if (adapter->priv[i]) {
 683                         priv = adapter->priv[i];
 684
 685                         mwifiex_clean_auto_tdls(priv);
 686                         mwifiex_abort_cac(priv);
 687                         mwifiex_clean_txrx(priv);
 688                         mwifiex_delete_bss_prio_tbl(priv);
 689                 }
 690         }
 691
 692         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 693
 694         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 695                 struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 696
 697                 atomic_dec(&adapter->rx_pending);
 698                 priv = adapter->priv[rx_info->bss_num];
 699                 if (priv)
 700                         priv->stats.rx_dropped++;
 701
 702                 dev_kfree_skb_any(skb);
 703         }
 704
 705         spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 706
 707         spin_lock(&adapter->mwifiex_lock);
 708
 709         mwifiex_adapter_cleanup(adapter);
 710
 711         spin_unlock(&adapter->mwifiex_lock);
 712
 713         /* Notify completion */
 714         ret = mwifiex_shutdown_fw_complete(adapter);
 715
 716         return ret;
 717 }
 718
 719 /*
 720  * This function downloads the firmware to the card.
 721  *
 722  * The actual download is preceded by two sanity checks -
 723  *      - Check if firmware is already running
 724  *      - Check if the interface is the winner to download the firmware
 725  *
 726  * ...and followed by another -
 727  *      - Check if the firmware is downloaded successfully
 728  *
 729  * After download is successfully completed, the host interrupts are enabled.
 730  */
 731 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 732                     struct mwifiex_fw_image *pmfw)
 733 {
 734         int ret;
 735         u32 poll_num = 1;
 736
 737         if (adapter->if_ops.check_fw_status) {
 738                 adapter->winner = 0;
 739
 740                 /* check if firmware is already running */
 741                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 742                 if (!ret) {
 743                         dev_notice(adapter->dev,
 744                                    "WLAN FW already running! Skip FW dnld\n");
 745                         return 0;
 746                 }
 747
 748                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 749
 750                 /* check if we are the winner for downloading FW */
 751                 if (!adapter->winner) {
 752                         dev_notice(adapter->dev,
 753                                    "FW already running! Skip FW dnld\n");
 754                         goto poll_fw;
 755                 }
 756         }
 757
 758         if (pmfw) {
 759                 /* Download firmware with helper */
 760                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 761                 if (ret) {
 762                         dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
 763                         return ret;
 764                 }
 765         }
 766
 767 poll_fw:
 768         /* Check if the firmware is downloaded successfully or not */
 769         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 770         if (ret)
 771                 dev_err(adapter->dev, "FW failed to be active in time\n");
 772
 773         return ret;
 774 }