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 static void scan_delay_timer_fn(unsigned long data)
  61 {
  62         struct mwifiex_private *priv = (struct mwifiex_private *)data;
  63         struct mwifiex_adapter *adapter = priv->adapter;
  64         struct cmd_ctrl_node *cmd_node, *tmp_node;
  65         unsigned long flags;
  66
  67         if (adapter->surprise_removed)
  68                 return;
  69
  70         if (adapter->scan_delay_cnt == MWIFIEX_MAX_SCAN_DELAY_CNT) {
  71                 /*
  72                  * Abort scan operation by cancelling all pending scan
  73                  * commands
  74                  */
  75                 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
  76                 list_for_each_entry_safe(cmd_node, tmp_node,
  77                                          &adapter->scan_pending_q, list) {
  78                         list_del(&cmd_node->list);
  79                         cmd_node->wait_q_enabled = false;
  80                         mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
  81                 }
  82                 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
  83
  84                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
  85                 adapter->scan_processing = false;
  86                 adapter->scan_delay_cnt = 0;
  87                 adapter->empty_tx_q_cnt = 0;
  88                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
  89
  90                 if (priv->user_scan_cfg) {
  91                         if (priv->scan_request) {
  92                                 dev_dbg(priv->adapter->dev,
  93                                         "info: aborting scan\n");
  94                                 cfg80211_scan_done(priv->scan_request, 1);
  95                                 priv->scan_request = NULL;
  96                         } else {
  97                                 dev_dbg(priv->adapter->dev,
  98                                         "info: scan already aborted\n");
  99                         }
 100
 101                         kfree(priv->user_scan_cfg);
 102                         priv->user_scan_cfg = NULL;
 103                 }
 104                 goto done;
 105         }
 106
 107         if (!atomic_read(&priv->adapter->is_tx_received)) {
 108                 adapter->empty_tx_q_cnt++;
 109                 if (adapter->empty_tx_q_cnt == MWIFIEX_MAX_EMPTY_TX_Q_CNT) {
 110                         /*
 111                          * No Tx traffic for 200msec. Get scan command from
 112                          * scan pending queue and put to cmd pending queue to
 113                          * resume scan operation
 114                          */
 115                         adapter->scan_delay_cnt = 0;
 116                         adapter->empty_tx_q_cnt = 0;
 117                         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
 118                         cmd_node = list_first_entry(&adapter->scan_pending_q,
 119                                                     struct cmd_ctrl_node, list);
 120                         list_del(&cmd_node->list);
 121                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
 122                                                flags);
 123
 124                         mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
 125                                                         true);
 126                         queue_work(adapter->workqueue, &adapter->main_work);
 127                         goto done;
 128                 }
 129         } else {
 130                 adapter->empty_tx_q_cnt = 0;
 131         }
 132
 133         /* Delay scan operation further by 20msec */
 134         mod_timer(&priv->scan_delay_timer, jiffies +
 135                   msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
 136         adapter->scan_delay_cnt++;
 137
 138 done:
 139         if (atomic_read(&priv->adapter->is_tx_received))
 140                 atomic_set(&priv->adapter->is_tx_received, false);
 141
 142         return;
 143 }
 144
 145 /*
 146  * This function initializes the private structure and sets default
 147  * values to the members.
 148  *
 149  * Additionally, it also initializes all the locks and sets up all the
 150  * lists.
 151  */
 152 static int mwifiex_init_priv(struct mwifiex_private *priv)
 153 {
 154         u32 i;
 155
 156         priv->media_connected = false;
 157         memset(priv->curr_addr, 0xff, ETH_ALEN);
 158
 159         priv->pkt_tx_ctrl = 0;
 160         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
 161         priv->data_rate = 0;    /* Initially indicate the rate as auto */
 162         priv->is_data_rate_auto = true;
 163         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
 164         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
 165
 166         priv->sec_info.wep_enabled = 0;
 167         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
 168         priv->sec_info.encryption_mode = 0;
 169         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
 170                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
 171         priv->wep_key_curr_index = 0;
 172         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
 173                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
 174
 175         priv->beacon_period = 100; /* beacon interval */ ;
 176         priv->attempted_bss_desc = NULL;
 177         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 178         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 179
 180         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 181         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 182         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 183         priv->assoc_rsp_size = 0;
 184         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 185         priv->atim_window = 0;
 186         priv->adhoc_state = ADHOC_IDLE;
 187         priv->tx_power_level = 0;
 188         priv->max_tx_power_level = 0;
 189         priv->min_tx_power_level = 0;
 190         priv->tx_rate = 0;
 191         priv->rxpd_htinfo = 0;
 192         priv->rxpd_rate = 0;
 193         priv->rate_bitmap = 0;
 194         priv->data_rssi_last = 0;
 195         priv->data_rssi_avg = 0;
 196         priv->data_nf_avg = 0;
 197         priv->data_nf_last = 0;
 198         priv->bcn_rssi_last = 0;
 199         priv->bcn_rssi_avg = 0;
 200         priv->bcn_nf_avg = 0;
 201         priv->bcn_nf_last = 0;
 202         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 203         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 204         priv->wpa_ie_len = 0;
 205         priv->wpa_is_gtk_set = false;
 206
 207         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 208         priv->assoc_tlv_buf_len = 0;
 209         memset(&priv->wps, 0, sizeof(priv->wps));
 210         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 211         priv->gen_ie_buf_len = 0;
 212         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 213
 214         priv->wmm_required = true;
 215         priv->wmm_enabled = false;
 216         priv->wmm_qosinfo = 0;
 217         priv->curr_bcn_buf = NULL;
 218         priv->curr_bcn_size = 0;
 219         priv->wps_ie = NULL;
 220         priv->wps_ie_len = 0;
 221         priv->mgmt_rx_freq = 2437;
 222
 223         priv->scan_block = false;
 224
 225         setup_timer(&priv->scan_delay_timer, scan_delay_timer_fn,
 226                     (unsigned long)priv);
 227
 228         return mwifiex_add_bss_prio_tbl(priv);
 229 }
 230
 231 /*
 232  * This function allocates buffers for members of the adapter
 233  * structure.
 234  *
 235  * The memory allocated includes scan table, command buffers, and
 236  * sleep confirm command buffer. In addition, the queues are
 237  * also initialized.
 238  */
 239 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 240 {
 241         int ret;
 242
 243         /* Allocate command buffer */
 244         ret = mwifiex_alloc_cmd_buffer(adapter);
 245         if (ret) {
 246                 dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
 247                         __func__);
 248                 return -1;
 249         }
 250
 251         adapter->sleep_cfm =
 252                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 253                               + INTF_HEADER_LEN);
 254
 255         if (!adapter->sleep_cfm) {
 256                 dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
 257                         " cmd buffer\n", __func__);
 258                 return -1;
 259         }
 260         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 261
 262         return 0;
 263 }
 264
 265 /*
 266  * This function initializes the adapter structure and sets default
 267  * values to the members of adapter.
 268  *
 269  * This also initializes the WMM related parameters in the driver private
 270  * structures.
 271  */
 272 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 273 {
 274         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 275
 276         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 277
 278         adapter->cmd_sent = false;
 279
 280         if (adapter->iface_type == MWIFIEX_PCIE)
 281                 adapter->data_sent = false;
 282         else
 283                 adapter->data_sent = true;
 284
 285         adapter->cmd_resp_received = false;
 286         adapter->event_received = false;
 287         adapter->data_received = false;
 288
 289         adapter->surprise_removed = false;
 290
 291         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 292
 293         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 294         adapter->ps_state = PS_STATE_AWAKE;
 295         adapter->need_to_wakeup = false;
 296
 297         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 298         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 299         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 300         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 301
 302         adapter->scan_probes = 1;
 303
 304         adapter->multiple_dtim = 1;
 305
 306         adapter->local_listen_interval = 0;     /* default value in firmware
 307                                                    will be used */
 308
 309         adapter->is_deep_sleep = false;
 310
 311         adapter->delay_null_pkt = false;
 312         adapter->delay_to_ps = 1000;
 313         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 314
 315         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 316                                            default */
 317         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 318                                            default */
 319         adapter->pm_wakeup_card_req = false;
 320
 321         adapter->pm_wakeup_fw_try = false;
 322
 323         adapter->max_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 324         adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 325         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 326
 327         adapter->is_hs_configured = false;
 328         adapter->hs_cfg.conditions = cpu_to_le32(HOST_SLEEP_CFG_COND_DEF);
 329         adapter->hs_cfg.gpio = HOST_SLEEP_CFG_GPIO_DEF;
 330         adapter->hs_cfg.gap = HOST_SLEEP_CFG_GAP_DEF;
 331         adapter->hs_activated = false;
 332
 333         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 334         adapter->hw_dot_11n_dev_cap = 0;
 335         adapter->hw_dev_mcs_support = 0;
 336         adapter->sec_chan_offset = 0;
 337         adapter->adhoc_11n_enabled = false;
 338
 339         mwifiex_wmm_init(adapter);
 340
 341         if (adapter->sleep_cfm) {
 342                 sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 343                                                 adapter->sleep_cfm->data;
 344                 memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 345                 sleep_cfm_buf->command =
 346                                 cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 347                 sleep_cfm_buf->size =
 348                                 cpu_to_le16(adapter->sleep_cfm->len);
 349                 sleep_cfm_buf->result = 0;
 350                 sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 351                 sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 352         }
 353         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 354         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 355         adapter->tx_lock_flag = false;
 356         adapter->null_pkt_interval = 0;
 357         adapter->fw_bands = 0;
 358         adapter->config_bands = 0;
 359         adapter->adhoc_start_band = 0;
 360         adapter->scan_channels = NULL;
 361         adapter->fw_release_number = 0;
 362         adapter->fw_cap_info = 0;
 363         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 364         adapter->event_cause = 0;
 365         adapter->region_code = 0;
 366         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 367         adapter->adhoc_awake_period = 0;
 368         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 369         adapter->arp_filter_size = 0;
 370         adapter->channel_type = NL80211_CHAN_HT20;
 371         adapter->empty_tx_q_cnt = 0;
 372 }
 373
 374 /*
 375  * This function sets trans_start per tx_queue
 376  */
 377 void mwifiex_set_trans_start(struct net_device *dev)
 378 {
 379         int i;
 380
 381         for (i = 0; i < dev->num_tx_queues; i++)
 382                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 383
 384         dev->trans_start = jiffies;
 385 }
 386
 387 /*
 388  * This function wakes up all queues in net_device
 389  */
 390 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 391                                         struct mwifiex_adapter *adapter)
 392 {
 393         unsigned long dev_queue_flags;
 394         unsigned int i;
 395
 396         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 397
 398         for (i = 0; i < netdev->num_tx_queues; i++) {
 399                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 400
 401                 if (netif_tx_queue_stopped(txq))
 402                         netif_tx_wake_queue(txq);
 403         }
 404
 405         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 406 }
 407
 408 /*
 409  * This function stops all queues in net_device
 410  */
 411 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 412                                         struct mwifiex_adapter *adapter)
 413 {
 414         unsigned long dev_queue_flags;
 415         unsigned int i;
 416
 417         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 418
 419         for (i = 0; i < netdev->num_tx_queues; i++) {
 420                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 421
 422                 if (!netif_tx_queue_stopped(txq))
 423                         netif_tx_stop_queue(txq);
 424         }
 425
 426         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 427 }
 428
 429 /*
 430  *  This function releases the lock variables and frees the locks and
 431  *  associated locks.
 432  */
 433 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 434 {
 435         struct mwifiex_private *priv;
 436         s32 i, j;
 437
 438         /* Free lists */
 439         list_del(&adapter->cmd_free_q);
 440         list_del(&adapter->cmd_pending_q);
 441         list_del(&adapter->scan_pending_q);
 442
 443         for (i = 0; i < adapter->priv_num; i++)
 444                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 445
 446         for (i = 0; i < adapter->priv_num; i++) {
 447                 if (adapter->priv[i]) {
 448                         priv = adapter->priv[i];
 449                         for (j = 0; j < MAX_NUM_TID; ++j)
 450                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 451                         list_del(&priv->tx_ba_stream_tbl_ptr);
 452                         list_del(&priv->rx_reorder_tbl_ptr);
 453                 }
 454         }
 455 }
 456
 457 /*
 458  * This function performs cleanup for adapter structure.
 459  *
 460  * The cleanup is done recursively, by canceling all pending
 461  * commands, freeing the member buffers previously allocated
 462  * (command buffers, scan table buffer, sleep confirm command
 463  * buffer), stopping the timers and calling the cleanup routines
 464  * for every interface.
 465  */
 466 static void
 467 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
 468 {
 469         int i;
 470
 471         if (!adapter) {
 472                 pr_err("%s: adapter is NULL\n", __func__);
 473                 return;
 474         }
 475
 476         for (i = 0; i < adapter->priv_num; i++) {
 477                 if (adapter->priv[i])
 478                         del_timer_sync(&adapter->priv[i]->scan_delay_timer);
 479         }
 480
 481         mwifiex_cancel_all_pending_cmd(adapter);
 482
 483         /* Free lock variables */
 484         mwifiex_free_lock_list(adapter);
 485
 486         /* Free command buffer */
 487         dev_dbg(adapter->dev, "info: free cmd buffer\n");
 488         mwifiex_free_cmd_buffer(adapter);
 489
 490         del_timer(&adapter->cmd_timer);
 491
 492         dev_dbg(adapter->dev, "info: free scan table\n");
 493
 494         adapter->if_ops.cleanup_if(adapter);
 495
 496         if (adapter->sleep_cfm)
 497                 dev_kfree_skb_any(adapter->sleep_cfm);
 498 }
 499
 500 /*
 501  *  This function intializes the lock variables and
 502  *  the list heads.
 503  */
 504 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 505 {
 506         struct mwifiex_private *priv;
 507         s32 i, j;
 508
 509         spin_lock_init(&adapter->mwifiex_lock);
 510         spin_lock_init(&adapter->int_lock);
 511         spin_lock_init(&adapter->main_proc_lock);
 512         spin_lock_init(&adapter->mwifiex_cmd_lock);
 513         spin_lock_init(&adapter->queue_lock);
 514         for (i = 0; i < adapter->priv_num; i++) {
 515                 if (adapter->priv[i]) {
 516                         priv = adapter->priv[i];
 517                         spin_lock_init(&priv->rx_pkt_lock);
 518                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 519                         spin_lock_init(&priv->curr_bcn_buf_lock);
 520                 }
 521         }
 522
 523         /* Initialize cmd_free_q */
 524         INIT_LIST_HEAD(&adapter->cmd_free_q);
 525         /* Initialize cmd_pending_q */
 526         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 527         /* Initialize scan_pending_q */
 528         INIT_LIST_HEAD(&adapter->scan_pending_q);
 529
 530         spin_lock_init(&adapter->cmd_free_q_lock);
 531         spin_lock_init(&adapter->cmd_pending_q_lock);
 532         spin_lock_init(&adapter->scan_pending_q_lock);
 533
 534         for (i = 0; i < adapter->priv_num; ++i) {
 535                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 536                 adapter->bss_prio_tbl[i].bss_prio_cur = NULL;
 537                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 538         }
 539
 540         for (i = 0; i < adapter->priv_num; i++) {
 541                 if (!adapter->priv[i])
 542                         continue;
 543                 priv = adapter->priv[i];
 544                 for (j = 0; j < MAX_NUM_TID; ++j) {
 545                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 546                         spin_lock_init(&priv->wmm.tid_tbl_ptr[j].tid_tbl_lock);
 547                 }
 548                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 549                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 550
 551                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 552                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 553         }
 554
 555         return 0;
 556 }
 557
 558 /*
 559  * This function initializes the firmware.
 560  *
 561  * The following operations are performed sequentially -
 562  *      - Allocate adapter structure
 563  *      - Initialize the adapter structure
 564  *      - Initialize the private structure
 565  *      - Add BSS priority tables to the adapter structure
 566  *      - For each interface, send the init commands to firmware
 567  *      - Send the first command in command pending queue, if available
 568  */
 569 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 570 {
 571         int ret;
 572         struct mwifiex_private *priv;
 573         u8 i, first_sta = true;
 574         int is_cmd_pend_q_empty;
 575         unsigned long flags;
 576
 577         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 578
 579         /* Allocate memory for member of adapter structure */
 580         ret = mwifiex_allocate_adapter(adapter);
 581         if (ret)
 582                 return -1;
 583
 584         /* Initialize adapter structure */
 585         mwifiex_init_adapter(adapter);
 586
 587         for (i = 0; i < adapter->priv_num; i++) {
 588                 if (adapter->priv[i]) {
 589                         priv = adapter->priv[i];
 590
 591                         /* Initialize private structure */
 592                         ret = mwifiex_init_priv(priv);
 593                         if (ret)
 594                                 return -1;
 595                 }
 596         }
 597         for (i = 0; i < adapter->priv_num; i++) {
 598                 if (adapter->priv[i]) {
 599                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
 600                         if (ret == -1)
 601                                 return -1;
 602
 603                         first_sta = false;
 604                 }
 605         }
 606
 607         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 608         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 609         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 610         if (!is_cmd_pend_q_empty) {
 611                 /* Send the first command in queue and return */
 612                 if (mwifiex_main_process(adapter) != -1)
 613                         ret = -EINPROGRESS;
 614         } else {
 615                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 616         }
 617
 618         return ret;
 619 }
 620
 621 /*
 622  * This function deletes the BSS priority tables.
 623  *
 624  * The function traverses through all the allocated BSS priority nodes
 625  * in every BSS priority table and frees them.
 626  */
 627 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 628 {
 629         int i;
 630         struct mwifiex_adapter *adapter = priv->adapter;
 631         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node, **cur;
 632         struct list_head *head;
 633         spinlock_t *lock; /* bss priority lock */
 634         unsigned long flags;
 635
 636         for (i = 0; i < adapter->priv_num; ++i) {
 637                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 638                 cur = &adapter->bss_prio_tbl[i].bss_prio_cur;
 639                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 640                 dev_dbg(adapter->dev, "info: delete BSS priority table,"
 641                                 " bss_type = %d, bss_num = %d, i = %d,"
 642                                 " head = %p, cur = %p\n",
 643                               priv->bss_type, priv->bss_num, i, head, *cur);
 644                 if (*cur) {
 645                         spin_lock_irqsave(lock, flags);
 646                         if (list_empty(head)) {
 647                                 spin_unlock_irqrestore(lock, flags);
 648                                 continue;
 649                         }
 650                         bssprio_node = list_first_entry(head,
 651                                         struct mwifiex_bss_prio_node, list);
 652                         spin_unlock_irqrestore(lock, flags);
 653
 654                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 655                                                  list) {
 656                                 if (bssprio_node->priv == priv) {
 657                                         dev_dbg(adapter->dev, "info: Delete "
 658                                                 "node %p, next = %p\n",
 659                                                 bssprio_node, tmp_node);
 660                                         spin_lock_irqsave(lock, flags);
 661                                         list_del(&bssprio_node->list);
 662                                         spin_unlock_irqrestore(lock, flags);
 663                                         kfree(bssprio_node);
 664                                 }
 665                         }
 666                         *cur = (struct mwifiex_bss_prio_node *)head;
 667                 }
 668         }
 669 }
 670
 671 /*
 672  * This function is used to shutdown the driver.
 673  *
 674  * The following operations are performed sequentially -
 675  *      - Check if already shut down
 676  *      - Make sure the main process has stopped
 677  *      - Clean up the Tx and Rx queues
 678  *      - Delete BSS priority tables
 679  *      - Free the adapter
 680  *      - Notify completion
 681  */
 682 int
 683 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 684 {
 685         int ret = -EINPROGRESS;
 686         struct mwifiex_private *priv;
 687         s32 i;
 688         unsigned long flags;
 689
 690         /* mwifiex already shutdown */
 691         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 692                 return 0;
 693
 694         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 695         /* wait for mwifiex_process to complete */
 696         if (adapter->mwifiex_processing) {
 697                 dev_warn(adapter->dev, "main process is still running\n");
 698                 return ret;
 699         }
 700
 701         /* shut down mwifiex */
 702         dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");
 703
 704         /* Clean up Tx/Rx queues and delete BSS priority table */
 705         for (i = 0; i < adapter->priv_num; i++) {
 706                 if (adapter->priv[i]) {
 707                         priv = adapter->priv[i];
 708
 709                         mwifiex_clean_txrx(priv);
 710                         mwifiex_delete_bss_prio_tbl(priv);
 711                 }
 712         }
 713
 714         spin_lock_irqsave(&adapter->mwifiex_lock, flags);
 715
 716         mwifiex_adapter_cleanup(adapter);
 717
 718         spin_unlock_irqrestore(&adapter->mwifiex_lock, flags);
 719
 720         /* Notify completion */
 721         ret = mwifiex_shutdown_fw_complete(adapter);
 722
 723         return ret;
 724 }
 725
 726 /*
 727  * This function downloads the firmware to the card.
 728  *
 729  * The actual download is preceded by two sanity checks -
 730  *      - Check if firmware is already running
 731  *      - Check if the interface is the winner to download the firmware
 732  *
 733  * ...and followed by another -
 734  *      - Check if the firmware is downloaded successfully
 735  *
 736  * After download is successfully completed, the host interrupts are enabled.
 737  */
 738 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 739                     struct mwifiex_fw_image *pmfw)
 740 {
 741         int ret;
 742         u32 poll_num = 1;
 743
 744         adapter->winner = 0;
 745
 746         /* Check if firmware is already running */
 747         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 748         if (!ret) {
 749                 dev_notice(adapter->dev,
 750                            "WLAN FW already running! Skip FW download\n");
 751                 goto done;
 752         }
 753         poll_num = MAX_FIRMWARE_POLL_TRIES;
 754
 755         /* Check if we are the winner for downloading FW */
 756         if (!adapter->winner) {
 757                 dev_notice(adapter->dev,
 758                            "Other intf already running! Skip FW download\n");
 759                 poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
 760                 goto poll_fw;
 761         }
 762         if (pmfw) {
 763                 /* Download firmware with helper */
 764                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 765                 if (ret) {
 766                         dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
 767                         return ret;
 768                 }
 769         }
 770
 771 poll_fw:
 772         /* Check if the firmware is downloaded successfully or not */
 773         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 774         if (ret) {
 775                 dev_err(adapter->dev, "FW failed to be active in time\n");
 776                 return -1;
 777         }
 778 done:
 779         /* re-enable host interrupt for mwifiex after fw dnld is successful */
 780         adapter->if_ops.enable_int(adapter);
 781         return ret;
 782 }