drivers/net/wireless/mwifiex/init.c

   1 /*
   2  * Marvell Wireless LAN device driver: HW/FW Initialization
   3  *
   4  * Copyright (C) 2011, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27
  28 /*
  29  * This function adds a BSS priority table to the table list.
  30  *
  31  * The function allocates a new BSS priority table node and adds it to
  32  * the end of BSS priority table list, kept in driver memory.
  33  */
  34 static int mwifiex_add_bss_prio_tbl(struct mwifiex_private *priv)
  35 {
  36         struct mwifiex_adapter *adapter = priv->adapter;
  37         struct mwifiex_bss_prio_node *bss_prio;
  38         struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
  39         unsigned long flags;
  40
  41         bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
  42         if (!bss_prio) {
  43                 dev_err(adapter->dev, "%s: failed to alloc bss_prio\n",
  44                         __func__);
  45                 return -ENOMEM;
  46         }
  47
  48         bss_prio->priv = priv;
  49         INIT_LIST_HEAD(&bss_prio->list);
  50         if (!tbl[priv->bss_priority].bss_prio_cur)
  51                 tbl[priv->bss_priority].bss_prio_cur = bss_prio;
  52
  53         spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags);
  54         list_add_tail(&bss_prio->list, &tbl[priv->bss_priority].bss_prio_head);
  55         spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags);
  56
  57         return 0;
  58 }
  59
  60 /*
  61  * This function initializes the private structure and sets default
  62  * values to the members.
  63  *
  64  * Additionally, it also initializes all the locks and sets up all the
  65  * lists.
  66  */
  67 static int mwifiex_init_priv(struct mwifiex_private *priv)
  68 {
  69         u32 i;
  70
  71         priv->media_connected = false;
  72         memset(priv->curr_addr, 0xff, ETH_ALEN);
  73
  74         priv->pkt_tx_ctrl = 0;
  75         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
  76         priv->data_rate = 0;    /* Initially indicate the rate as auto */
  77         priv->is_data_rate_auto = true;
  78         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
  79         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
  80
  81         priv->sec_info.wep_enabled = 0;
  82         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
  83         priv->sec_info.encryption_mode = 0;
  84         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
  85                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
  86         priv->wep_key_curr_index = 0;
  87         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
  88                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
  89
  90         priv->beacon_period = 100; /* beacon interval */ ;
  91         priv->attempted_bss_desc = NULL;
  92         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
  93         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
  94
  95         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
  96         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
  97         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
  98         priv->assoc_rsp_size = 0;
  99         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 100         priv->atim_window = 0;
 101         priv->adhoc_state = ADHOC_IDLE;
 102         priv->tx_power_level = 0;
 103         priv->max_tx_power_level = 0;
 104         priv->min_tx_power_level = 0;
 105         priv->tx_rate = 0;
 106         priv->rxpd_htinfo = 0;
 107         priv->rxpd_rate = 0;
 108         priv->rate_bitmap = 0;
 109         priv->data_rssi_last = 0;
 110         priv->data_rssi_avg = 0;
 111         priv->data_nf_avg = 0;
 112         priv->data_nf_last = 0;
 113         priv->bcn_rssi_last = 0;
 114         priv->bcn_rssi_avg = 0;
 115         priv->bcn_nf_avg = 0;
 116         priv->bcn_nf_last = 0;
 117         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 118         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 119         priv->wpa_ie_len = 0;
 120         priv->wpa_is_gtk_set = false;
 121
 122         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 123         priv->assoc_tlv_buf_len = 0;
 124         memset(&priv->wps, 0, sizeof(priv->wps));
 125         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 126         priv->gen_ie_buf_len = 0;
 127         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 128
 129         priv->wmm_required = true;
 130         priv->wmm_enabled = false;
 131         priv->wmm_qosinfo = 0;
 132         priv->curr_bcn_buf = NULL;
 133         priv->curr_bcn_size = 0;
 134
 135         priv->scan_block = false;
 136
 137         return mwifiex_add_bss_prio_tbl(priv);
 138 }
 139
 140 /*
 141  * This function allocates buffers for members of the adapter
 142  * structure.
 143  *
 144  * The memory allocated includes scan table, command buffers, and
 145  * sleep confirm command buffer. In addition, the queues are
 146  * also initialized.
 147  */
 148 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 149 {
 150         int ret;
 151
 152         /* Allocate command buffer */
 153         ret = mwifiex_alloc_cmd_buffer(adapter);
 154         if (ret) {
 155                 dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
 156                         __func__);
 157                 return -1;
 158         }
 159
 160         adapter->sleep_cfm =
 161                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 162                               + INTF_HEADER_LEN);
 163
 164         if (!adapter->sleep_cfm) {
 165                 dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
 166                         " cmd buffer\n", __func__);
 167                 return -1;
 168         }
 169         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 170
 171         return 0;
 172 }
 173
 174 /*
 175  * This function initializes the adapter structure and sets default
 176  * values to the members of adapter.
 177  *
 178  * This also initializes the WMM related parameters in the driver private
 179  * structures.
 180  */
 181 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 182 {
 183         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 184
 185         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 186
 187         adapter->cmd_sent = false;
 188
 189         if (adapter->iface_type == MWIFIEX_PCIE)
 190                 adapter->data_sent = false;
 191         else
 192                 adapter->data_sent = true;
 193
 194         adapter->cmd_resp_received = false;
 195         adapter->event_received = false;
 196         adapter->data_received = false;
 197
 198         adapter->surprise_removed = false;
 199
 200         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 201
 202         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 203         adapter->ps_state = PS_STATE_AWAKE;
 204         adapter->need_to_wakeup = false;
 205
 206         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 207         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 208         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 209         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 210
 211         adapter->scan_probes = 1;
 212
 213         adapter->multiple_dtim = 1;
 214
 215         adapter->local_listen_interval = 0;     /* default value in firmware
 216                                                    will be used */
 217
 218         adapter->is_deep_sleep = false;
 219
 220         adapter->delay_null_pkt = false;
 221         adapter->delay_to_ps = 1000;
 222         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 223
 224         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 225                                            default */
 226         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 227                                            default */
 228         adapter->pm_wakeup_card_req = false;
 229
 230         adapter->pm_wakeup_fw_try = false;
 231
 232         adapter->max_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 233         adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 234         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 235
 236         adapter->is_hs_configured = false;
 237         adapter->hs_cfg.conditions = cpu_to_le32(HOST_SLEEP_CFG_COND_DEF);
 238         adapter->hs_cfg.gpio = HOST_SLEEP_CFG_GPIO_DEF;
 239         adapter->hs_cfg.gap = HOST_SLEEP_CFG_GAP_DEF;
 240         adapter->hs_activated = false;
 241
 242         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 243         adapter->hw_dot_11n_dev_cap = 0;
 244         adapter->hw_dev_mcs_support = 0;
 245         adapter->sec_chan_offset = 0;
 246         adapter->adhoc_11n_enabled = false;
 247
 248         mwifiex_wmm_init(adapter);
 249
 250         if (adapter->sleep_cfm) {
 251                 sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 252                                                 adapter->sleep_cfm->data;
 253                 memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 254                 sleep_cfm_buf->command =
 255                                 cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 256                 sleep_cfm_buf->size =
 257                                 cpu_to_le16(adapter->sleep_cfm->len);
 258                 sleep_cfm_buf->result = 0;
 259                 sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 260                 sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 261         }
 262         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 263         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 264         adapter->tx_lock_flag = false;
 265         adapter->null_pkt_interval = 0;
 266         adapter->fw_bands = 0;
 267         adapter->config_bands = 0;
 268         adapter->adhoc_start_band = 0;
 269         adapter->scan_channels = NULL;
 270         adapter->fw_release_number = 0;
 271         adapter->fw_cap_info = 0;
 272         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 273         adapter->event_cause = 0;
 274         adapter->region_code = 0;
 275         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 276         adapter->adhoc_awake_period = 0;
 277         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 278         adapter->arp_filter_size = 0;
 279         adapter->channel_type = NL80211_CHAN_HT20;
 280 }
 281
 282 /*
 283  * This function sets trans_start per tx_queue
 284  */
 285 void mwifiex_set_trans_start(struct net_device *dev)
 286 {
 287         int i;
 288
 289         for (i = 0; i < dev->num_tx_queues; i++)
 290                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 291
 292         dev->trans_start = jiffies;
 293 }
 294
 295 /*
 296  * This function wakes up all queues in net_device
 297  */
 298 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 299                                         struct mwifiex_adapter *adapter)
 300 {
 301         unsigned long dev_queue_flags;
 302
 303         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 304         netif_tx_wake_all_queues(netdev);
 305         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 306 }
 307
 308 /*
 309  * This function stops all queues in net_device
 310  */
 311 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 312                                         struct mwifiex_adapter *adapter)
 313 {
 314         unsigned long dev_queue_flags;
 315
 316         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 317         netif_tx_stop_all_queues(netdev);
 318         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 319 }
 320
 321 /*
 322  *  This function releases the lock variables and frees the locks and
 323  *  associated locks.
 324  */
 325 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 326 {
 327         struct mwifiex_private *priv;
 328         s32 i, j;
 329
 330         /* Free lists */
 331         list_del(&adapter->cmd_free_q);
 332         list_del(&adapter->cmd_pending_q);
 333         list_del(&adapter->scan_pending_q);
 334
 335         for (i = 0; i < adapter->priv_num; i++)
 336                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 337
 338         for (i = 0; i < adapter->priv_num; i++) {
 339                 if (adapter->priv[i]) {
 340                         priv = adapter->priv[i];
 341                         for (j = 0; j < MAX_NUM_TID; ++j)
 342                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 343                         list_del(&priv->tx_ba_stream_tbl_ptr);
 344                         list_del(&priv->rx_reorder_tbl_ptr);
 345                 }
 346         }
 347 }
 348
 349 /*
 350  * This function frees the adapter structure.
 351  *
 352  * The freeing operation is done recursively, by canceling all
 353  * pending commands, freeing the member buffers previously
 354  * allocated (command buffers, scan table buffer, sleep confirm
 355  * command buffer), stopping the timers and calling the cleanup
 356  * routines for every interface, before the actual adapter
 357  * structure is freed.
 358  */
 359 static void
 360 mwifiex_free_adapter(struct mwifiex_adapter *adapter)
 361 {
 362         if (!adapter) {
 363                 pr_err("%s: adapter is NULL\n", __func__);
 364                 return;
 365         }
 366
 367         mwifiex_cancel_all_pending_cmd(adapter);
 368
 369         /* Free lock variables */
 370         mwifiex_free_lock_list(adapter);
 371
 372         /* Free command buffer */
 373         dev_dbg(adapter->dev, "info: free cmd buffer\n");
 374         mwifiex_free_cmd_buffer(adapter);
 375
 376         del_timer(&adapter->cmd_timer);
 377
 378         dev_dbg(adapter->dev, "info: free scan table\n");
 379
 380         adapter->if_ops.cleanup_if(adapter);
 381
 382         if (adapter->sleep_cfm)
 383                 dev_kfree_skb_any(adapter->sleep_cfm);
 384 }
 385
 386 /*
 387  *  This function intializes the lock variables and
 388  *  the list heads.
 389  */
 390 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 391 {
 392         struct mwifiex_private *priv;
 393         s32 i, j;
 394
 395         spin_lock_init(&adapter->mwifiex_lock);
 396         spin_lock_init(&adapter->int_lock);
 397         spin_lock_init(&adapter->main_proc_lock);
 398         spin_lock_init(&adapter->mwifiex_cmd_lock);
 399         spin_lock_init(&adapter->queue_lock);
 400         for (i = 0; i < adapter->priv_num; i++) {
 401                 if (adapter->priv[i]) {
 402                         priv = adapter->priv[i];
 403                         spin_lock_init(&priv->rx_pkt_lock);
 404                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 405                         spin_lock_init(&priv->curr_bcn_buf_lock);
 406                 }
 407         }
 408
 409         /* Initialize cmd_free_q */
 410         INIT_LIST_HEAD(&adapter->cmd_free_q);
 411         /* Initialize cmd_pending_q */
 412         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 413         /* Initialize scan_pending_q */
 414         INIT_LIST_HEAD(&adapter->scan_pending_q);
 415
 416         spin_lock_init(&adapter->cmd_free_q_lock);
 417         spin_lock_init(&adapter->cmd_pending_q_lock);
 418         spin_lock_init(&adapter->scan_pending_q_lock);
 419
 420         for (i = 0; i < adapter->priv_num; ++i) {
 421                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 422                 adapter->bss_prio_tbl[i].bss_prio_cur = NULL;
 423                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 424         }
 425
 426         for (i = 0; i < adapter->priv_num; i++) {
 427                 if (!adapter->priv[i])
 428                         continue;
 429                 priv = adapter->priv[i];
 430                 for (j = 0; j < MAX_NUM_TID; ++j) {
 431                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 432                         spin_lock_init(&priv->wmm.tid_tbl_ptr[j].tid_tbl_lock);
 433                 }
 434                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 435                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 436
 437                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 438                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 439         }
 440
 441         return 0;
 442 }
 443
 444 /*
 445  * This function initializes the firmware.
 446  *
 447  * The following operations are performed sequentially -
 448  *      - Allocate adapter structure
 449  *      - Initialize the adapter structure
 450  *      - Initialize the private structure
 451  *      - Add BSS priority tables to the adapter structure
 452  *      - For each interface, send the init commands to firmware
 453  *      - Send the first command in command pending queue, if available
 454  */
 455 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 456 {
 457         int ret;
 458         struct mwifiex_private *priv;
 459         u8 i, first_sta = true;
 460         int is_cmd_pend_q_empty;
 461         unsigned long flags;
 462
 463         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 464
 465         /* Allocate memory for member of adapter structure */
 466         ret = mwifiex_allocate_adapter(adapter);
 467         if (ret)
 468                 return -1;
 469
 470         /* Initialize adapter structure */
 471         mwifiex_init_adapter(adapter);
 472
 473         for (i = 0; i < adapter->priv_num; i++) {
 474                 if (adapter->priv[i]) {
 475                         priv = adapter->priv[i];
 476
 477                         /* Initialize private structure */
 478                         ret = mwifiex_init_priv(priv);
 479                         if (ret)
 480                                 return -1;
 481                 }
 482         }
 483         for (i = 0; i < adapter->priv_num; i++) {
 484                 if (adapter->priv[i]) {
 485                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
 486                         if (ret == -1)
 487                                 return -1;
 488
 489                         first_sta = false;
 490                 }
 491         }
 492
 493         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 494         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 495         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 496         if (!is_cmd_pend_q_empty) {
 497                 /* Send the first command in queue and return */
 498                 if (mwifiex_main_process(adapter) != -1)
 499                         ret = -EINPROGRESS;
 500         } else {
 501                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 502         }
 503
 504         return ret;
 505 }
 506
 507 /*
 508  * This function deletes the BSS priority tables.
 509  *
 510  * The function traverses through all the allocated BSS priority nodes
 511  * in every BSS priority table and frees them.
 512  */
 513 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 514 {
 515         int i;
 516         struct mwifiex_adapter *adapter = priv->adapter;
 517         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node, **cur;
 518         struct list_head *head;
 519         spinlock_t *lock; /* bss priority lock */
 520         unsigned long flags;
 521
 522         for (i = 0; i < adapter->priv_num; ++i) {
 523                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 524                 cur = &adapter->bss_prio_tbl[i].bss_prio_cur;
 525                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 526                 dev_dbg(adapter->dev, "info: delete BSS priority table,"
 527                                 " bss_type = %d, bss_num = %d, i = %d,"
 528                                 " head = %p, cur = %p\n",
 529                               priv->bss_type, priv->bss_num, i, head, *cur);
 530                 if (*cur) {
 531                         spin_lock_irqsave(lock, flags);
 532                         if (list_empty(head)) {
 533                                 spin_unlock_irqrestore(lock, flags);
 534                                 continue;
 535                         }
 536                         bssprio_node = list_first_entry(head,
 537                                         struct mwifiex_bss_prio_node, list);
 538                         spin_unlock_irqrestore(lock, flags);
 539
 540                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 541                                                  list) {
 542                                 if (bssprio_node->priv == priv) {
 543                                         dev_dbg(adapter->dev, "info: Delete "
 544                                                 "node %p, next = %p\n",
 545                                                 bssprio_node, tmp_node);
 546                                         spin_lock_irqsave(lock, flags);
 547                                         list_del(&bssprio_node->list);
 548                                         spin_unlock_irqrestore(lock, flags);
 549                                         kfree(bssprio_node);
 550                                 }
 551                         }
 552                         *cur = (struct mwifiex_bss_prio_node *)head;
 553                 }
 554         }
 555 }
 556
 557 /*
 558  * This function is used to shutdown the driver.
 559  *
 560  * The following operations are performed sequentially -
 561  *      - Check if already shut down
 562  *      - Make sure the main process has stopped
 563  *      - Clean up the Tx and Rx queues
 564  *      - Delete BSS priority tables
 565  *      - Free the adapter
 566  *      - Notify completion
 567  */
 568 int
 569 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 570 {
 571         int ret = -EINPROGRESS;
 572         struct mwifiex_private *priv;
 573         s32 i;
 574         unsigned long flags;
 575
 576         /* mwifiex already shutdown */
 577         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 578                 return 0;
 579
 580         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 581         /* wait for mwifiex_process to complete */
 582         if (adapter->mwifiex_processing) {
 583                 dev_warn(adapter->dev, "main process is still running\n");
 584                 return ret;
 585         }
 586
 587         /* shut down mwifiex */
 588         dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");
 589
 590         /* Clean up Tx/Rx queues and delete BSS priority table */
 591         for (i = 0; i < adapter->priv_num; i++) {
 592                 if (adapter->priv[i]) {
 593                         priv = adapter->priv[i];
 594
 595                         mwifiex_clean_txrx(priv);
 596                         mwifiex_delete_bss_prio_tbl(priv);
 597                 }
 598         }
 599
 600         spin_lock_irqsave(&adapter->mwifiex_lock, flags);
 601
 602         /* Free adapter structure */
 603         mwifiex_free_adapter(adapter);
 604
 605         spin_unlock_irqrestore(&adapter->mwifiex_lock, flags);
 606
 607         /* Notify completion */
 608         ret = mwifiex_shutdown_fw_complete(adapter);
 609
 610         return ret;
 611 }
 612
 613 /*
 614  * This function downloads the firmware to the card.
 615  *
 616  * The actual download is preceded by two sanity checks -
 617  *      - Check if firmware is already running
 618  *      - Check if the interface is the winner to download the firmware
 619  *
 620  * ...and followed by another -
 621  *      - Check if the firmware is downloaded successfully
 622  *
 623  * After download is successfully completed, the host interrupts are enabled.
 624  */
 625 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 626                     struct mwifiex_fw_image *pmfw)
 627 {
 628         int ret;
 629         u32 poll_num = 1;
 630
 631         adapter->winner = 0;
 632
 633         /* Check if firmware is already running */
 634         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 635         if (!ret) {
 636                 dev_notice(adapter->dev,
 637                            "WLAN FW already running! Skip FW download\n");
 638                 goto done;
 639         }
 640         poll_num = MAX_FIRMWARE_POLL_TRIES;
 641
 642         /* Check if we are the winner for downloading FW */
 643         if (!adapter->winner) {
 644                 dev_notice(adapter->dev,
 645                            "Other intf already running! Skip FW download\n");
 646                 poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
 647                 goto poll_fw;
 648         }
 649         if (pmfw) {
 650                 /* Download firmware with helper */
 651                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 652                 if (ret) {
 653                         dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
 654                         return ret;
 655                 }
 656         }
 657
 658 poll_fw:
 659         /* Check if the firmware is downloaded successfully or not */
 660         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 661         if (ret) {
 662                 dev_err(adapter->dev, "FW failed to be active in time\n");
 663                 return -1;
 664         }
 665 done:
 666         /* re-enable host interrupt for mwifiex after fw dnld is successful */
 667         adapter->if_ops.enable_int(adapter);
 668         return ret;
 669 }