drivers/net/wireless/marvell/libertas_tf/main.c

   1 /*
   2  *  Copyright (C) 2008, cozybit Inc.
   3  *  Copyright (C) 2003-2006, Marvell International Ltd.
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or (at
   8  *  your option) any later version.
   9  */
  10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  11
  12 #include <linux/hardirq.h>
  13 #include <linux/slab.h>
  14
  15 #include <linux/etherdevice.h>
  16 #include <linux/module.h>
  17 #include "libertas_tf.h"
  18
  19 /* thinfirm version: 5.132.X.pX */
  20 #define LBTF_FW_VER_MIN         0x05840300
  21 #define LBTF_FW_VER_MAX         0x0584ffff
  22 #define QOS_CONTROL_LEN         2
  23
  24 /* Module parameters */
  25 unsigned int lbtf_debug;
  26 EXPORT_SYMBOL_GPL(lbtf_debug);
  27 module_param_named(libertas_tf_debug, lbtf_debug, int, 0644);
  28
  29 struct workqueue_struct *lbtf_wq;
  30
  31 static const struct ieee80211_channel lbtf_channels[] = {
  32         { .center_freq = 2412, .hw_value = 1 },
  33         { .center_freq = 2417, .hw_value = 2 },
  34         { .center_freq = 2422, .hw_value = 3 },
  35         { .center_freq = 2427, .hw_value = 4 },
  36         { .center_freq = 2432, .hw_value = 5 },
  37         { .center_freq = 2437, .hw_value = 6 },
  38         { .center_freq = 2442, .hw_value = 7 },
  39         { .center_freq = 2447, .hw_value = 8 },
  40         { .center_freq = 2452, .hw_value = 9 },
  41         { .center_freq = 2457, .hw_value = 10 },
  42         { .center_freq = 2462, .hw_value = 11 },
  43         { .center_freq = 2467, .hw_value = 12 },
  44         { .center_freq = 2472, .hw_value = 13 },
  45         { .center_freq = 2484, .hw_value = 14 },
  46 };
  47
  48 /* This table contains the hardware specific values for the modulation rates. */
  49 static const struct ieee80211_rate lbtf_rates[] = {
  50         { .bitrate = 10,
  51           .hw_value = 0, },
  52         { .bitrate = 20,
  53           .hw_value = 1,
  54           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  55         { .bitrate = 55,
  56           .hw_value = 2,
  57           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  58         { .bitrate = 110,
  59           .hw_value = 3,
  60           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  61         { .bitrate = 60,
  62           .hw_value = 5,
  63           .flags = 0 },
  64         { .bitrate = 90,
  65           .hw_value = 6,
  66           .flags = 0 },
  67         { .bitrate = 120,
  68           .hw_value = 7,
  69           .flags = 0 },
  70         { .bitrate = 180,
  71           .hw_value = 8,
  72           .flags = 0 },
  73         { .bitrate = 240,
  74           .hw_value = 9,
  75           .flags = 0 },
  76         { .bitrate = 360,
  77           .hw_value = 10,
  78           .flags = 0 },
  79         { .bitrate = 480,
  80           .hw_value = 11,
  81           .flags = 0 },
  82         { .bitrate = 540,
  83           .hw_value = 12,
  84           .flags = 0 },
  85 };
  86
  87 static void lbtf_cmd_work(struct work_struct *work)
  88 {
  89         struct lbtf_private *priv = container_of(work, struct lbtf_private,
  90                                          cmd_work);
  91
  92         lbtf_deb_enter(LBTF_DEB_CMD);
  93
  94         spin_lock_irq(&priv->driver_lock);
  95         /* command response? */
  96         if (priv->cmd_response_rxed) {
  97                 priv->cmd_response_rxed = 0;
  98                 spin_unlock_irq(&priv->driver_lock);
  99                 lbtf_process_rx_command(priv);
 100                 spin_lock_irq(&priv->driver_lock);
 101         }
 102
 103         if (priv->cmd_timed_out && priv->cur_cmd) {
 104                 struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 105
 106                 if (++priv->nr_retries > 10) {
 107                         lbtf_complete_command(priv, cmdnode,
 108                                               -ETIMEDOUT);
 109                         priv->nr_retries = 0;
 110                 } else {
 111                         priv->cur_cmd = NULL;
 112
 113                         /* Stick it back at the _top_ of the pending
 114                          * queue for immediate resubmission */
 115                         list_add(&cmdnode->list, &priv->cmdpendingq);
 116                 }
 117         }
 118         priv->cmd_timed_out = 0;
 119         spin_unlock_irq(&priv->driver_lock);
 120
 121         if (!priv->fw_ready) {
 122                 lbtf_deb_leave_args(LBTF_DEB_CMD, "fw not ready");
 123                 return;
 124         }
 125
 126         /* Execute the next command */
 127         if (!priv->cur_cmd)
 128                 lbtf_execute_next_command(priv);
 129
 130         lbtf_deb_leave(LBTF_DEB_CMD);
 131 }
 132
 133 /**
 134  *  lbtf_setup_firmware: initialize firmware.
 135  *
 136  *  @priv    A pointer to struct lbtf_private structure
 137  *
 138  *  Returns: 0 on success.
 139  */
 140 static int lbtf_setup_firmware(struct lbtf_private *priv)
 141 {
 142         int ret = -1;
 143
 144         lbtf_deb_enter(LBTF_DEB_FW);
 145         /*
 146          * Read priv address from HW
 147          */
 148         eth_broadcast_addr(priv->current_addr);
 149         ret = lbtf_update_hw_spec(priv);
 150         if (ret) {
 151                 ret = -1;
 152                 goto done;
 153         }
 154
 155         lbtf_set_mac_control(priv);
 156         lbtf_set_radio_control(priv);
 157
 158         ret = 0;
 159 done:
 160         lbtf_deb_leave_args(LBTF_DEB_FW, "ret: %d", ret);
 161         return ret;
 162 }
 163
 164 /**
 165  *  This function handles the timeout of command sending.
 166  *  It will re-send the same command again.
 167  */
 168 static void command_timer_fn(unsigned long data)
 169 {
 170         struct lbtf_private *priv = (struct lbtf_private *)data;
 171         unsigned long flags;
 172         lbtf_deb_enter(LBTF_DEB_CMD);
 173
 174         spin_lock_irqsave(&priv->driver_lock, flags);
 175
 176         if (!priv->cur_cmd) {
 177                 printk(KERN_DEBUG "libertastf: command timer expired; "
 178                                   "no pending command\n");
 179                 goto out;
 180         }
 181
 182         printk(KERN_DEBUG "libertas: command %x timed out\n",
 183                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 184
 185         priv->cmd_timed_out = 1;
 186         queue_work(lbtf_wq, &priv->cmd_work);
 187 out:
 188         spin_unlock_irqrestore(&priv->driver_lock, flags);
 189         lbtf_deb_leave(LBTF_DEB_CMD);
 190 }
 191
 192 static int lbtf_init_adapter(struct lbtf_private *priv)
 193 {
 194         lbtf_deb_enter(LBTF_DEB_MAIN);
 195         eth_broadcast_addr(priv->current_addr);
 196         mutex_init(&priv->lock);
 197
 198         priv->vif = NULL;
 199         setup_timer(&priv->command_timer, command_timer_fn,
 200                 (unsigned long)priv);
 201
 202         INIT_LIST_HEAD(&priv->cmdfreeq);
 203         INIT_LIST_HEAD(&priv->cmdpendingq);
 204
 205         spin_lock_init(&priv->driver_lock);
 206
 207         /* Allocate the command buffers */
 208         if (lbtf_allocate_cmd_buffer(priv))
 209                 return -1;
 210
 211         lbtf_deb_leave(LBTF_DEB_MAIN);
 212         return 0;
 213 }
 214
 215 static void lbtf_free_adapter(struct lbtf_private *priv)
 216 {
 217         lbtf_deb_enter(LBTF_DEB_MAIN);
 218         lbtf_free_cmd_buffer(priv);
 219         del_timer(&priv->command_timer);
 220         lbtf_deb_leave(LBTF_DEB_MAIN);
 221 }
 222
 223 static void lbtf_op_tx(struct ieee80211_hw *hw,
 224                        struct ieee80211_tx_control *control,
 225                        struct sk_buff *skb)
 226 {
 227         struct lbtf_private *priv = hw->priv;
 228
 229         priv->skb_to_tx = skb;
 230         queue_work(lbtf_wq, &priv->tx_work);
 231         /*
 232          * queue will be restarted when we receive transmission feedback if
 233          * there are no buffered multicast frames to send
 234          */
 235         ieee80211_stop_queues(priv->hw);
 236 }
 237
 238 static void lbtf_tx_work(struct work_struct *work)
 239 {
 240         struct lbtf_private *priv = container_of(work, struct lbtf_private,
 241                                          tx_work);
 242         unsigned int len;
 243         struct ieee80211_tx_info *info;
 244         struct txpd *txpd;
 245         struct sk_buff *skb = NULL;
 246         int err;
 247
 248         lbtf_deb_enter(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 249
 250         if ((priv->vif->type == NL80211_IFTYPE_AP) &&
 251             (!skb_queue_empty(&priv->bc_ps_buf)))
 252                 skb = skb_dequeue(&priv->bc_ps_buf);
 253         else if (priv->skb_to_tx) {
 254                 skb = priv->skb_to_tx;
 255                 priv->skb_to_tx = NULL;
 256         } else {
 257                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 258                 return;
 259         }
 260
 261         len = skb->len;
 262         info  = IEEE80211_SKB_CB(skb);
 263         txpd = (struct txpd *)  skb_push(skb, sizeof(struct txpd));
 264
 265         if (priv->surpriseremoved) {
 266                 dev_kfree_skb_any(skb);
 267                 lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 268                 return;
 269         }
 270
 271         memset(txpd, 0, sizeof(struct txpd));
 272         /* Activate per-packet rate selection */
 273         txpd->tx_control |= cpu_to_le32(MRVL_PER_PACKET_RATE |
 274                              ieee80211_get_tx_rate(priv->hw, info)->hw_value);
 275
 276         /* copy destination address from 802.11 header */
 277         memcpy(txpd->tx_dest_addr_high, skb->data + sizeof(struct txpd) + 4,
 278                 ETH_ALEN);
 279         txpd->tx_packet_length = cpu_to_le16(len);
 280         txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
 281         lbtf_deb_hex(LBTF_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100));
 282         BUG_ON(priv->tx_skb);
 283         spin_lock_irq(&priv->driver_lock);
 284         priv->tx_skb = skb;
 285         err = priv->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
 286         spin_unlock_irq(&priv->driver_lock);
 287         if (err) {
 288                 dev_kfree_skb_any(skb);
 289                 priv->tx_skb = NULL;
 290                 pr_err("TX error: %d", err);
 291         }
 292         lbtf_deb_leave(LBTF_DEB_MACOPS | LBTF_DEB_TX);
 293 }
 294
 295 static int lbtf_op_start(struct ieee80211_hw *hw)
 296 {
 297         struct lbtf_private *priv = hw->priv;
 298         void *card = priv->card;
 299         int ret = -1;
 300
 301         lbtf_deb_enter(LBTF_DEB_MACOPS);
 302
 303         if (!priv->fw_ready)
 304                 /* Upload firmware */
 305                 if (priv->hw_prog_firmware(card))
 306                         goto err_prog_firmware;
 307
 308         /* poke the firmware */
 309         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
 310         priv->radioon = RADIO_ON;
 311         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 312         ret = lbtf_setup_firmware(priv);
 313         if (ret)
 314                 goto err_prog_firmware;
 315
 316         if ((priv->fwrelease < LBTF_FW_VER_MIN) ||
 317             (priv->fwrelease > LBTF_FW_VER_MAX)) {
 318                 ret = -1;
 319                 goto err_prog_firmware;
 320         }
 321
 322         printk(KERN_INFO "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
 323         lbtf_deb_leave(LBTF_DEB_MACOPS);
 324         return 0;
 325
 326 err_prog_firmware:
 327         priv->hw_reset_device(card);
 328         lbtf_deb_leave_args(LBTF_DEB_MACOPS, "error programming fw; ret=%d", ret);
 329         return ret;
 330 }
 331
 332 static void lbtf_op_stop(struct ieee80211_hw *hw)
 333 {
 334         struct lbtf_private *priv = hw->priv;
 335         unsigned long flags;
 336         struct sk_buff *skb;
 337
 338         struct cmd_ctrl_node *cmdnode;
 339
 340         lbtf_deb_enter(LBTF_DEB_MACOPS);
 341
 342         /* Flush pending command nodes */
 343         spin_lock_irqsave(&priv->driver_lock, flags);
 344         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
 345                 cmdnode->result = -ENOENT;
 346                 cmdnode->cmdwaitqwoken = 1;
 347                 wake_up_interruptible(&cmdnode->cmdwait_q);
 348         }
 349
 350         spin_unlock_irqrestore(&priv->driver_lock, flags);
 351         cancel_work_sync(&priv->cmd_work);
 352         cancel_work_sync(&priv->tx_work);
 353         while ((skb = skb_dequeue(&priv->bc_ps_buf)))
 354                 dev_kfree_skb_any(skb);
 355         priv->radioon = RADIO_OFF;
 356         lbtf_set_radio_control(priv);
 357
 358         lbtf_deb_leave(LBTF_DEB_MACOPS);
 359 }
 360
 361 static int lbtf_op_add_interface(struct ieee80211_hw *hw,
 362                         struct ieee80211_vif *vif)
 363 {
 364         struct lbtf_private *priv = hw->priv;
 365         lbtf_deb_enter(LBTF_DEB_MACOPS);
 366         if (priv->vif != NULL)
 367                 return -EOPNOTSUPP;
 368
 369         priv->vif = vif;
 370         switch (vif->type) {
 371         case NL80211_IFTYPE_MESH_POINT:
 372         case NL80211_IFTYPE_AP:
 373                 lbtf_set_mode(priv, LBTF_AP_MODE);
 374                 break;
 375         case NL80211_IFTYPE_STATION:
 376                 lbtf_set_mode(priv, LBTF_STA_MODE);
 377                 break;
 378         default:
 379                 priv->vif = NULL;
 380                 return -EOPNOTSUPP;
 381         }
 382         lbtf_set_mac_address(priv, (u8 *) vif->addr);
 383         lbtf_deb_leave(LBTF_DEB_MACOPS);
 384         return 0;
 385 }
 386
 387 static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
 388                         struct ieee80211_vif *vif)
 389 {
 390         struct lbtf_private *priv = hw->priv;
 391         lbtf_deb_enter(LBTF_DEB_MACOPS);
 392
 393         if (priv->vif->type == NL80211_IFTYPE_AP ||
 394             priv->vif->type == NL80211_IFTYPE_MESH_POINT)
 395                 lbtf_beacon_ctrl(priv, 0, 0);
 396         lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
 397         lbtf_set_bssid(priv, 0, NULL);
 398         priv->vif = NULL;
 399         lbtf_deb_leave(LBTF_DEB_MACOPS);
 400 }
 401
 402 static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
 403 {
 404         struct lbtf_private *priv = hw->priv;
 405         struct ieee80211_conf *conf = &hw->conf;
 406         lbtf_deb_enter(LBTF_DEB_MACOPS);
 407
 408         if (conf->chandef.chan->center_freq != priv->cur_freq) {
 409                 priv->cur_freq = conf->chandef.chan->center_freq;
 410                 lbtf_set_channel(priv, conf->chandef.chan->hw_value);
 411         }
 412         lbtf_deb_leave(LBTF_DEB_MACOPS);
 413         return 0;
 414 }
 415
 416 static u64 lbtf_op_prepare_multicast(struct ieee80211_hw *hw,
 417                                      struct netdev_hw_addr_list *mc_list)
 418 {
 419         struct lbtf_private *priv = hw->priv;
 420         int i;
 421         struct netdev_hw_addr *ha;
 422         int mc_count = netdev_hw_addr_list_count(mc_list);
 423
 424         if (!mc_count || mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE)
 425                 return mc_count;
 426
 427         priv->nr_of_multicastmacaddr = mc_count;
 428         i = 0;
 429         netdev_hw_addr_list_for_each(ha, mc_list)
 430                 memcpy(&priv->multicastlist[i++], ha->addr, ETH_ALEN);
 431
 432         return mc_count;
 433 }
 434
 435 #define SUPPORTED_FIF_FLAGS  FIF_ALLMULTI
 436 static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
 437                         unsigned int changed_flags,
 438                         unsigned int *new_flags,
 439                         u64 multicast)
 440 {
 441         struct lbtf_private *priv = hw->priv;
 442         int old_mac_control = priv->mac_control;
 443
 444         lbtf_deb_enter(LBTF_DEB_MACOPS);
 445
 446         changed_flags &= SUPPORTED_FIF_FLAGS;
 447         *new_flags &= SUPPORTED_FIF_FLAGS;
 448
 449         if (!changed_flags) {
 450                 lbtf_deb_leave(LBTF_DEB_MACOPS);
 451                 return;
 452         }
 453
 454         priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 455         if (*new_flags & (FIF_ALLMULTI) ||
 456             multicast > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
 457                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 458                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 459         } else if (multicast) {
 460                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 461                 priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 462                 lbtf_cmd_set_mac_multicast_addr(priv);
 463         } else {
 464                 priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
 465                                        CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 466                 if (priv->nr_of_multicastmacaddr) {
 467                         priv->nr_of_multicastmacaddr = 0;
 468                         lbtf_cmd_set_mac_multicast_addr(priv);
 469                 }
 470         }
 471
 472
 473         if (priv->mac_control != old_mac_control)
 474                 lbtf_set_mac_control(priv);
 475
 476         lbtf_deb_leave(LBTF_DEB_MACOPS);
 477 }
 478
 479 static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
 480                         struct ieee80211_vif *vif,
 481                         struct ieee80211_bss_conf *bss_conf,
 482                         u32 changes)
 483 {
 484         struct lbtf_private *priv = hw->priv;
 485         struct sk_buff *beacon;
 486         lbtf_deb_enter(LBTF_DEB_MACOPS);
 487
 488         if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_INT)) {
 489                 switch (priv->vif->type) {
 490                 case NL80211_IFTYPE_AP:
 491                 case NL80211_IFTYPE_MESH_POINT:
 492                         beacon = ieee80211_beacon_get(hw, vif);
 493                         if (beacon) {
 494                                 lbtf_beacon_set(priv, beacon);
 495                                 kfree_skb(beacon);
 496                                 lbtf_beacon_ctrl(priv, 1,
 497                                                  bss_conf->beacon_int);
 498                         }
 499                         break;
 500                 default:
 501                         break;
 502                 }
 503         }
 504
 505         if (changes & BSS_CHANGED_BSSID) {
 506                 bool activate = !is_zero_ether_addr(bss_conf->bssid);
 507                 lbtf_set_bssid(priv, activate, bss_conf->bssid);
 508         }
 509
 510         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
 511                 if (bss_conf->use_short_preamble)
 512                         priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
 513                 else
 514                         priv->preamble = CMD_TYPE_LONG_PREAMBLE;
 515                 lbtf_set_radio_control(priv);
 516         }
 517
 518         lbtf_deb_leave(LBTF_DEB_MACOPS);
 519 }
 520
 521 static int lbtf_op_get_survey(struct ieee80211_hw *hw, int idx,
 522                                 struct survey_info *survey)
 523 {
 524         struct lbtf_private *priv = hw->priv;
 525         struct ieee80211_conf *conf = &hw->conf;
 526
 527         if (idx != 0)
 528                 return -ENOENT;
 529
 530         survey->channel = conf->chandef.chan;
 531         survey->filled = SURVEY_INFO_NOISE_DBM;
 532         survey->noise = priv->noise;
 533
 534         return 0;
 535 }
 536
 537 static const struct ieee80211_ops lbtf_ops = {
 538         .tx                     = lbtf_op_tx,
 539         .start                  = lbtf_op_start,
 540         .stop                   = lbtf_op_stop,
 541         .add_interface          = lbtf_op_add_interface,
 542         .remove_interface       = lbtf_op_remove_interface,
 543         .config                 = lbtf_op_config,
 544         .prepare_multicast      = lbtf_op_prepare_multicast,
 545         .configure_filter       = lbtf_op_configure_filter,
 546         .bss_info_changed       = lbtf_op_bss_info_changed,
 547         .get_survey             = lbtf_op_get_survey,
 548 };
 549
 550 int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
 551 {
 552         struct ieee80211_rx_status stats;
 553         struct rxpd *prxpd;
 554         int need_padding;
 555         unsigned int flags;
 556         struct ieee80211_hdr *hdr;
 557
 558         lbtf_deb_enter(LBTF_DEB_RX);
 559
 560         prxpd = (struct rxpd *) skb->data;
 561
 562         memset(&stats, 0, sizeof(stats));
 563         if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
 564                 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
 565         stats.freq = priv->cur_freq;
 566         stats.band = NL80211_BAND_2GHZ;
 567         stats.signal = prxpd->snr;
 568         priv->noise = prxpd->nf;
 569         /* Marvell rate index has a hole at value 4 */
 570         if (prxpd->rx_rate > 4)
 571                 --prxpd->rx_rate;
 572         stats.rate_idx = prxpd->rx_rate;
 573         skb_pull(skb, sizeof(struct rxpd));
 574
 575         hdr = (struct ieee80211_hdr *)skb->data;
 576         flags = le32_to_cpu(*(__le32 *)(skb->data + 4));
 577
 578         need_padding = ieee80211_is_data_qos(hdr->frame_control);
 579         need_padding ^= ieee80211_has_a4(hdr->frame_control);
 580         need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
 581                         (*ieee80211_get_qos_ctl(hdr) &
 582                          IEEE80211_QOS_CTL_A_MSDU_PRESENT);
 583
 584         if (need_padding) {
 585                 memmove(skb->data + 2, skb->data, skb->len);
 586                 skb_reserve(skb, 2);
 587         }
 588
 589         memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
 590
 591         lbtf_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
 592                skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
 593         lbtf_deb_hex(LBTF_DEB_RX, "RX Data", skb->data,
 594                      min_t(unsigned int, skb->len, 100));
 595
 596         ieee80211_rx_irqsafe(priv->hw, skb);
 597
 598         lbtf_deb_leave(LBTF_DEB_RX);
 599         return 0;
 600 }
 601 EXPORT_SYMBOL_GPL(lbtf_rx);
 602
 603 /**
 604  * lbtf_add_card: Add and initialize the card, no fw upload yet.
 605  *
 606  *  @card    A pointer to card
 607  *
 608  *  Returns: pointer to struct lbtf_priv.
 609  */
 610 struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev)
 611 {
 612         struct ieee80211_hw *hw;
 613         struct lbtf_private *priv = NULL;
 614
 615         lbtf_deb_enter(LBTF_DEB_MAIN);
 616
 617         hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
 618         if (!hw)
 619                 goto done;
 620
 621         priv = hw->priv;
 622         if (lbtf_init_adapter(priv))
 623                 goto err_init_adapter;
 624
 625         priv->hw = hw;
 626         priv->card = card;
 627         priv->tx_skb = NULL;
 628
 629         hw->queues = 1;
 630         ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
 631         hw->extra_tx_headroom = sizeof(struct txpd);
 632         memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
 633         memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
 634         priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
 635         priv->band.bitrates = priv->rates;
 636         priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
 637         priv->band.channels = priv->channels;
 638         hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band;
 639         hw->wiphy->interface_modes =
 640                 BIT(NL80211_IFTYPE_STATION) |
 641                 BIT(NL80211_IFTYPE_ADHOC);
 642         skb_queue_head_init(&priv->bc_ps_buf);
 643
 644         SET_IEEE80211_DEV(hw, dmdev);
 645
 646         INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
 647         INIT_WORK(&priv->tx_work, lbtf_tx_work);
 648         if (ieee80211_register_hw(hw))
 649                 goto err_init_adapter;
 650
 651         goto done;
 652
 653 err_init_adapter:
 654         lbtf_free_adapter(priv);
 655         ieee80211_free_hw(hw);
 656         priv = NULL;
 657
 658 done:
 659         lbtf_deb_leave_args(LBTF_DEB_MAIN, "priv %p", priv);
 660         return priv;
 661 }
 662 EXPORT_SYMBOL_GPL(lbtf_add_card);
 663
 664
 665 int lbtf_remove_card(struct lbtf_private *priv)
 666 {
 667         struct ieee80211_hw *hw = priv->hw;
 668
 669         lbtf_deb_enter(LBTF_DEB_MAIN);
 670
 671         priv->surpriseremoved = 1;
 672         del_timer(&priv->command_timer);
 673         lbtf_free_adapter(priv);
 674         priv->hw = NULL;
 675         ieee80211_unregister_hw(hw);
 676         ieee80211_free_hw(hw);
 677
 678     lbtf_deb_leave(LBTF_DEB_MAIN);
 679         return 0;
 680 }
 681 EXPORT_SYMBOL_GPL(lbtf_remove_card);
 682
 683 void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
 684 {
 685         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
 686
 687         ieee80211_tx_info_clear_status(info);
 688         /*
 689          * Commented out, otherwise we never go beyond 1Mbit/s using mac80211
 690          * default pid rc algorithm.
 691          *
 692          * info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
 693          */
 694         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
 695                 info->flags |= IEEE80211_TX_STAT_ACK;
 696         skb_pull(priv->tx_skb, sizeof(struct txpd));
 697         ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
 698         priv->tx_skb = NULL;
 699         if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
 700                 ieee80211_wake_queues(priv->hw);
 701         else
 702                 queue_work(lbtf_wq, &priv->tx_work);
 703 }
 704 EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
 705
 706 void lbtf_bcn_sent(struct lbtf_private *priv)
 707 {
 708         struct sk_buff *skb = NULL;
 709
 710         if (priv->vif->type != NL80211_IFTYPE_AP)
 711                 return;
 712
 713         if (skb_queue_empty(&priv->bc_ps_buf)) {
 714                 bool tx_buff_bc = false;
 715
 716                 while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
 717                         skb_queue_tail(&priv->bc_ps_buf, skb);
 718                         tx_buff_bc = true;
 719                 }
 720                 if (tx_buff_bc) {
 721                         ieee80211_stop_queues(priv->hw);
 722                         queue_work(lbtf_wq, &priv->tx_work);
 723                 }
 724         }
 725
 726         skb = ieee80211_beacon_get(priv->hw, priv->vif);
 727
 728         if (skb) {
 729                 lbtf_beacon_set(priv, skb);
 730                 kfree_skb(skb);
 731         }
 732 }
 733 EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
 734
 735 static int __init lbtf_init_module(void)
 736 {
 737         lbtf_deb_enter(LBTF_DEB_MAIN);
 738         lbtf_wq = alloc_workqueue("libertastf", WQ_MEM_RECLAIM, 0);
 739         if (lbtf_wq == NULL) {
 740                 printk(KERN_ERR "libertastf: couldn't create workqueue\n");
 741                 return -ENOMEM;
 742         }
 743         lbtf_deb_leave(LBTF_DEB_MAIN);
 744         return 0;
 745 }
 746
 747 static void __exit lbtf_exit_module(void)
 748 {
 749         lbtf_deb_enter(LBTF_DEB_MAIN);
 750         destroy_workqueue(lbtf_wq);
 751         lbtf_deb_leave(LBTF_DEB_MAIN);
 752 }
 753
 754 module_init(lbtf_init_module);
 755 module_exit(lbtf_exit_module);
 756
 757 MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
 758 MODULE_AUTHOR("Cozybit Inc.");
 759 MODULE_LICENSE("GPL");