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         mwifiex_dbg(adapter, ERROR, "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         eth_broadcast_addr(priv->curr_addr);
  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                 mwifiex_dbg(adapter, ERROR,
 176                             "%s: failed to alloc cmd buffer\n",
 177                             __func__);
 178                 return -1;
 179         }
 180
 181         adapter->sleep_cfm =
 182                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 183                               + INTF_HEADER_LEN);
 184
 185         if (!adapter->sleep_cfm) {
 186                 mwifiex_dbg(adapter, ERROR,
 187                             "%s: failed to alloc sleep cfm\t"
 188                             " cmd buffer\n", __func__);
 189                 return -1;
 190         }
 191         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 192
 193         return 0;
 194 }
 195
 196 /*
 197  * This function initializes the adapter structure and sets default
 198  * values to the members of adapter.
 199  *
 200  * This also initializes the WMM related parameters in the driver private
 201  * structures.
 202  */
 203 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 204 {
 205         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 206
 207         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 208
 209         adapter->cmd_sent = false;
 210
 211         if (adapter->iface_type == MWIFIEX_SDIO)
 212                 adapter->data_sent = true;
 213         else
 214                 adapter->data_sent = false;
 215
 216         adapter->cmd_resp_received = false;
 217         adapter->event_received = false;
 218         adapter->data_received = false;
 219
 220         adapter->surprise_removed = false;
 221
 222         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 223
 224         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 225         adapter->ps_state = PS_STATE_AWAKE;
 226         adapter->need_to_wakeup = false;
 227
 228         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 229         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 230         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 231         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 232         adapter->scan_chan_gap_time = MWIFIEX_DEF_SCAN_CHAN_GAP_TIME;
 233
 234         adapter->scan_probes = 1;
 235
 236         adapter->multiple_dtim = 1;
 237
 238         adapter->local_listen_interval = 0;     /* default value in firmware
 239                                                    will be used */
 240
 241         adapter->is_deep_sleep = false;
 242
 243         adapter->delay_null_pkt = false;
 244         adapter->delay_to_ps = 1000;
 245         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 246
 247         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 248                                            default */
 249         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 250                                            default */
 251         adapter->pm_wakeup_card_req = false;
 252
 253         adapter->pm_wakeup_fw_try = false;
 254
 255         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 256
 257         adapter->is_hs_configured = false;
 258         adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF);
 259         adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF;
 260         adapter->hs_cfg.gap = HS_CFG_GAP_DEF;
 261         adapter->hs_activated = false;
 262
 263         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 264         adapter->hw_dot_11n_dev_cap = 0;
 265         adapter->hw_dev_mcs_support = 0;
 266         adapter->sec_chan_offset = 0;
 267         adapter->adhoc_11n_enabled = false;
 268
 269         mwifiex_wmm_init(adapter);
 270
 271         sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 272                                         adapter->sleep_cfm->data;
 273         memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 274         sleep_cfm_buf->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 275         sleep_cfm_buf->size = cpu_to_le16(adapter->sleep_cfm->len);
 276         sleep_cfm_buf->result = 0;
 277         sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 278         sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 279
 280         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 281         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 282         adapter->tx_lock_flag = false;
 283         adapter->null_pkt_interval = 0;
 284         adapter->fw_bands = 0;
 285         adapter->config_bands = 0;
 286         adapter->adhoc_start_band = 0;
 287         adapter->scan_channels = NULL;
 288         adapter->fw_release_number = 0;
 289         adapter->fw_cap_info = 0;
 290         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 291         adapter->event_cause = 0;
 292         adapter->region_code = 0;
 293         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 294         adapter->adhoc_awake_period = 0;
 295         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 296         adapter->arp_filter_size = 0;
 297         adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
 298         adapter->key_api_major_ver = 0;
 299         adapter->key_api_minor_ver = 0;
 300         eth_broadcast_addr(adapter->perm_addr);
 301         adapter->iface_limit.sta_intf = MWIFIEX_MAX_STA_NUM;
 302         adapter->iface_limit.uap_intf = MWIFIEX_MAX_UAP_NUM;
 303         adapter->iface_limit.p2p_intf = MWIFIEX_MAX_P2P_NUM;
 304
 305         setup_timer(&adapter->wakeup_timer, wakeup_timer_fn,
 306                     (unsigned long)adapter);
 307 }
 308
 309 /*
 310  * This function sets trans_start per tx_queue
 311  */
 312 void mwifiex_set_trans_start(struct net_device *dev)
 313 {
 314         int i;
 315
 316         for (i = 0; i < dev->num_tx_queues; i++)
 317                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 318
 319         dev->trans_start = jiffies;
 320 }
 321
 322 /*
 323  * This function wakes up all queues in net_device
 324  */
 325 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 326                                         struct mwifiex_adapter *adapter)
 327 {
 328         unsigned long dev_queue_flags;
 329         unsigned int i;
 330
 331         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 332
 333         for (i = 0; i < netdev->num_tx_queues; i++) {
 334                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 335
 336                 if (netif_tx_queue_stopped(txq))
 337                         netif_tx_wake_queue(txq);
 338         }
 339
 340         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 341 }
 342
 343 /*
 344  * This function stops all queues in net_device
 345  */
 346 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 347                                         struct mwifiex_adapter *adapter)
 348 {
 349         unsigned long dev_queue_flags;
 350         unsigned int i;
 351
 352         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 353
 354         for (i = 0; i < netdev->num_tx_queues; i++) {
 355                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 356
 357                 if (!netif_tx_queue_stopped(txq))
 358                         netif_tx_stop_queue(txq);
 359         }
 360
 361         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 362 }
 363
 364 /*
 365  *  This function releases the lock variables and frees the locks and
 366  *  associated locks.
 367  */
 368 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 369 {
 370         struct mwifiex_private *priv;
 371         s32 i, j;
 372
 373         /* Free lists */
 374         list_del(&adapter->cmd_free_q);
 375         list_del(&adapter->cmd_pending_q);
 376         list_del(&adapter->scan_pending_q);
 377
 378         for (i = 0; i < adapter->priv_num; i++)
 379                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 380
 381         for (i = 0; i < adapter->priv_num; i++) {
 382                 if (adapter->priv[i]) {
 383                         priv = adapter->priv[i];
 384                         for (j = 0; j < MAX_NUM_TID; ++j)
 385                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 386                         list_del(&priv->tx_ba_stream_tbl_ptr);
 387                         list_del(&priv->rx_reorder_tbl_ptr);
 388                         list_del(&priv->sta_list);
 389                         list_del(&priv->auto_tdls_list);
 390                 }
 391         }
 392 }
 393
 394 /*
 395  * This function performs cleanup for adapter structure.
 396  *
 397  * The cleanup is done recursively, by canceling all pending
 398  * commands, freeing the member buffers previously allocated
 399  * (command buffers, scan table buffer, sleep confirm command
 400  * buffer), stopping the timers and calling the cleanup routines
 401  * for every interface.
 402  */
 403 static void
 404 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
 405 {
 406         int idx;
 407
 408         if (!adapter) {
 409                 pr_err("%s: adapter is NULL\n", __func__);
 410                 return;
 411         }
 412
 413         del_timer(&adapter->wakeup_timer);
 414         mwifiex_cancel_all_pending_cmd(adapter);
 415         wake_up_interruptible(&adapter->cmd_wait_q.wait);
 416         wake_up_interruptible(&adapter->hs_activate_wait_q);
 417
 418         /* Free lock variables */
 419         mwifiex_free_lock_list(adapter);
 420
 421         /* Free command buffer */
 422         mwifiex_dbg(adapter, INFO, "info: free cmd buffer\n");
 423         mwifiex_free_cmd_buffer(adapter);
 424
 425         for (idx = 0; idx < adapter->num_mem_types; idx++) {
 426                 struct memory_type_mapping *entry =
 427                                 &adapter->mem_type_mapping_tbl[idx];
 428
 429                 if (entry->mem_ptr) {
 430                         vfree(entry->mem_ptr);
 431                         entry->mem_ptr = NULL;
 432                 }
 433                 entry->mem_size = 0;
 434         }
 435
 436         if (adapter->drv_info_dump) {
 437                 vfree(adapter->drv_info_dump);
 438                 adapter->drv_info_size = 0;
 439         }
 440
 441         if (adapter->sleep_cfm)
 442                 dev_kfree_skb_any(adapter->sleep_cfm);
 443 }
 444
 445 /*
 446  *  This function intializes the lock variables and
 447  *  the list heads.
 448  */
 449 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 450 {
 451         struct mwifiex_private *priv;
 452         s32 i, j;
 453
 454         spin_lock_init(&adapter->mwifiex_lock);
 455         spin_lock_init(&adapter->int_lock);
 456         spin_lock_init(&adapter->main_proc_lock);
 457         spin_lock_init(&adapter->mwifiex_cmd_lock);
 458         spin_lock_init(&adapter->queue_lock);
 459         for (i = 0; i < adapter->priv_num; i++) {
 460                 if (adapter->priv[i]) {
 461                         priv = adapter->priv[i];
 462                         spin_lock_init(&priv->rx_pkt_lock);
 463                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 464                         spin_lock_init(&priv->curr_bcn_buf_lock);
 465                         spin_lock_init(&priv->sta_list_spinlock);
 466                         spin_lock_init(&priv->auto_tdls_lock);
 467                 }
 468         }
 469
 470         /* Initialize cmd_free_q */
 471         INIT_LIST_HEAD(&adapter->cmd_free_q);
 472         /* Initialize cmd_pending_q */
 473         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 474         /* Initialize scan_pending_q */
 475         INIT_LIST_HEAD(&adapter->scan_pending_q);
 476
 477         spin_lock_init(&adapter->cmd_free_q_lock);
 478         spin_lock_init(&adapter->cmd_pending_q_lock);
 479         spin_lock_init(&adapter->scan_pending_q_lock);
 480         spin_lock_init(&adapter->rx_proc_lock);
 481
 482         skb_queue_head_init(&adapter->rx_data_q);
 483         skb_queue_head_init(&adapter->tx_data_q);
 484
 485         for (i = 0; i < adapter->priv_num; ++i) {
 486                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 487                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 488         }
 489
 490         for (i = 0; i < adapter->priv_num; i++) {
 491                 if (!adapter->priv[i])
 492                         continue;
 493                 priv = adapter->priv[i];
 494                 for (j = 0; j < MAX_NUM_TID; ++j)
 495                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 496                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 497                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 498                 INIT_LIST_HEAD(&priv->sta_list);
 499                 INIT_LIST_HEAD(&priv->auto_tdls_list);
 500                 skb_queue_head_init(&priv->tdls_txq);
 501
 502                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 503                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 504
 505                 spin_lock_init(&priv->ack_status_lock);
 506                 idr_init(&priv->ack_status_frames);
 507         }
 508
 509         return 0;
 510 }
 511
 512 /*
 513  * This function initializes the firmware.
 514  *
 515  * The following operations are performed sequentially -
 516  *      - Allocate adapter structure
 517  *      - Initialize the adapter structure
 518  *      - Initialize the private structure
 519  *      - Add BSS priority tables to the adapter structure
 520  *      - For each interface, send the init commands to firmware
 521  *      - Send the first command in command pending queue, if available
 522  */
 523 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 524 {
 525         int ret;
 526         struct mwifiex_private *priv;
 527         u8 i, first_sta = true;
 528         int is_cmd_pend_q_empty;
 529         unsigned long flags;
 530
 531         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 532
 533         /* Allocate memory for member of adapter structure */
 534         ret = mwifiex_allocate_adapter(adapter);
 535         if (ret)
 536                 return -1;
 537
 538         /* Initialize adapter structure */
 539         mwifiex_init_adapter(adapter);
 540
 541         for (i = 0; i < adapter->priv_num; i++) {
 542                 if (adapter->priv[i]) {
 543                         priv = adapter->priv[i];
 544
 545                         /* Initialize private structure */
 546                         ret = mwifiex_init_priv(priv);
 547                         if (ret)
 548                                 return -1;
 549                 }
 550         }
 551
 552         if (adapter->if_ops.init_fw_port) {
 553                 if (adapter->if_ops.init_fw_port(adapter))
 554                         return -1;
 555         }
 556
 557         for (i = 0; i < adapter->priv_num; i++) {
 558                 if (adapter->priv[i]) {
 559                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta,
 560                                                    true);
 561                         if (ret == -1)
 562                                 return -1;
 563
 564                         first_sta = false;
 565                 }
 566         }
 567
 568         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 569         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 570         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 571         if (!is_cmd_pend_q_empty) {
 572                 /* Send the first command in queue and return */
 573                 if (mwifiex_main_process(adapter) != -1)
 574                         ret = -EINPROGRESS;
 575         } else {
 576                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 577         }
 578
 579         return ret;
 580 }
 581
 582 /*
 583  * This function deletes the BSS priority tables.
 584  *
 585  * The function traverses through all the allocated BSS priority nodes
 586  * in every BSS priority table and frees them.
 587  */
 588 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 589 {
 590         int i;
 591         struct mwifiex_adapter *adapter = priv->adapter;
 592         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
 593         struct list_head *head;
 594         spinlock_t *lock; /* bss priority lock */
 595         unsigned long flags;
 596
 597         for (i = 0; i < adapter->priv_num; ++i) {
 598                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 599                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 600                 mwifiex_dbg(adapter, INFO,
 601                             "info: delete BSS priority table,\t"
 602                             "bss_type = %d, bss_num = %d, i = %d,\t"
 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                                         mwifiex_dbg(adapter, INFO,
 616                                                     "info: Delete\t"
 617                                                     "node %p, next = %p\n",
 618                                                     bssprio_node, tmp_node);
 619                                         list_del(&bssprio_node->list);
 620                                         kfree(bssprio_node);
 621                                 }
 622                         }
 623                         spin_unlock_irqrestore(lock, flags);
 624                 }
 625         }
 626 }
 627
 628 /*
 629  * This function frees the private structure, including cleans
 630  * up the TX and RX queues and frees the BSS priority tables.
 631  */
 632 void mwifiex_free_priv(struct mwifiex_private *priv)
 633 {
 634         mwifiex_clean_txrx(priv);
 635         mwifiex_delete_bss_prio_tbl(priv);
 636         mwifiex_free_curr_bcn(priv);
 637 }
 638
 639 /*
 640  * This function is used to shutdown the driver.
 641  *
 642  * The following operations are performed sequentially -
 643  *      - Check if already shut down
 644  *      - Make sure the main process has stopped
 645  *      - Clean up the Tx and Rx queues
 646  *      - Delete BSS priority tables
 647  *      - Free the adapter
 648  *      - Notify completion
 649  */
 650 int
 651 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 652 {
 653         int ret = -EINPROGRESS;
 654         struct mwifiex_private *priv;
 655         s32 i;
 656         unsigned long flags;
 657         struct sk_buff *skb;
 658
 659         /* mwifiex already shutdown */
 660         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 661                 return 0;
 662
 663         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 664         /* wait for mwifiex_process to complete */
 665         if (adapter->mwifiex_processing) {
 666                 mwifiex_dbg(adapter, WARN,
 667                             "main process is still running\n");
 668                 return ret;
 669         }
 670
 671         /* cancel current command */
 672         if (adapter->curr_cmd) {
 673                 mwifiex_dbg(adapter, WARN,
 674                             "curr_cmd is still in processing\n");
 675                 del_timer_sync(&adapter->cmd_timer);
 676                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 677                 adapter->curr_cmd = NULL;
 678         }
 679
 680         /* shut down mwifiex */
 681         mwifiex_dbg(adapter, MSG,
 682                     "info: shutdown mwifiex...\n");
 683
 684         /* Clean up Tx/Rx queues and delete BSS priority table */
 685         for (i = 0; i < adapter->priv_num; i++) {
 686                 if (adapter->priv[i]) {
 687                         priv = adapter->priv[i];
 688
 689                         mwifiex_clean_auto_tdls(priv);
 690                         mwifiex_abort_cac(priv);
 691                         mwifiex_clean_txrx(priv);
 692                         mwifiex_delete_bss_prio_tbl(priv);
 693                 }
 694         }
 695
 696         atomic_set(&adapter->tx_queued, 0);
 697         while ((skb = skb_dequeue(&adapter->tx_data_q)))
 698                 mwifiex_write_data_complete(adapter, skb, 0, 0);
 699
 700         spin_lock_irqsave(&adapter->rx_proc_lock, flags);
 701
 702         while ((skb = skb_dequeue(&adapter->rx_data_q))) {
 703                 struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 704
 705                 atomic_dec(&adapter->rx_pending);
 706                 priv = adapter->priv[rx_info->bss_num];
 707                 if (priv)
 708                         priv->stats.rx_dropped++;
 709
 710                 dev_kfree_skb_any(skb);
 711         }
 712
 713         spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
 714
 715         spin_lock(&adapter->mwifiex_lock);
 716
 717         mwifiex_adapter_cleanup(adapter);
 718
 719         spin_unlock(&adapter->mwifiex_lock);
 720
 721         /* Notify completion */
 722         ret = mwifiex_shutdown_fw_complete(adapter);
 723
 724         return ret;
 725 }
 726
 727 /*
 728  * This function downloads the firmware to the card.
 729  *
 730  * The actual download is preceded by two sanity checks -
 731  *      - Check if firmware is already running
 732  *      - Check if the interface is the winner to download the firmware
 733  *
 734  * ...and followed by another -
 735  *      - Check if the firmware is downloaded successfully
 736  *
 737  * After download is successfully completed, the host interrupts are enabled.
 738  */
 739 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 740                     struct mwifiex_fw_image *pmfw)
 741 {
 742         int ret;
 743         u32 poll_num = 1;
 744
 745         if (adapter->if_ops.check_fw_status) {
 746                 adapter->winner = 0;
 747
 748                 /* check if firmware is already running */
 749                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 750                 if (!ret) {
 751                         mwifiex_dbg(adapter, MSG,
 752                                     "WLAN FW already running! Skip FW dnld\n");
 753                         return 0;
 754                 }
 755
 756                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 757
 758                 /* check if we are the winner for downloading FW */
 759                 if (!adapter->winner) {
 760                         mwifiex_dbg(adapter, MSG,
 761                                     "FW already running! Skip FW dnld\n");
 762                         goto poll_fw;
 763                 }
 764         }
 765
 766         if (pmfw) {
 767                 /* Download firmware with helper */
 768                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 769                 if (ret) {
 770                         mwifiex_dbg(adapter, ERROR,
 771                                     "prog_fw failed ret=%#x\n", ret);
 772                         return ret;
 773                 }
 774         }
 775
 776 poll_fw:
 777         /* Check if the firmware is downloaded successfully or not */
 778         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 779         if (ret)
 780                 mwifiex_dbg(adapter, ERROR,
 781                             "FW failed to be active in time\n");
 782
 783         return ret;
 784 }