Pileus Git - ~andy/linux/blob - drivers/net/wireless/ti/wlcore/tx.c

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2009 Nokia Corporation
   5  *
   6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/etherdevice.h>
  27
  28 #include "wlcore.h"
  29 #include "debug.h"
  30 #include "io.h"
  31 #include "ps.h"
  32 #include "tx.h"
  33 #include "event.h"
  34 #include "hw_ops.h"
  35
  36 /*
  37  * TODO: this is here just for now, it must be removed when the data
  38  * operations are in place.
  39  */
  40 #include "../wl12xx/reg.h"
  41
  42 static int wl1271_set_default_wep_key(struct wl1271 *wl,
  43                                       struct wl12xx_vif *wlvif, u8 id)
  44 {
  45         int ret;
  46         bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
  47
  48         if (is_ap)
  49                 ret = wl12xx_cmd_set_default_wep_key(wl, id,
  50                                                      wlvif->ap.bcast_hlid);
  51         else
  52                 ret = wl12xx_cmd_set_default_wep_key(wl, id, wlvif->sta.hlid);
  53
  54         if (ret < 0)
  55                 return ret;
  56
  57         wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id);
  58         return 0;
  59 }
  60
  61 static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb)
  62 {
  63         int id;
  64
  65         id = find_first_zero_bit(wl->tx_frames_map, wl->num_tx_desc);
  66         if (id >= wl->num_tx_desc)
  67                 return -EBUSY;
  68
  69         __set_bit(id, wl->tx_frames_map);
  70         wl->tx_frames[id] = skb;
  71         wl->tx_frames_cnt++;
  72         return id;
  73 }
  74
  75 void wl1271_free_tx_id(struct wl1271 *wl, int id)
  76 {
  77         if (__test_and_clear_bit(id, wl->tx_frames_map)) {
  78                 if (unlikely(wl->tx_frames_cnt == wl->num_tx_desc))
  79                         clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
  80
  81                 wl->tx_frames[id] = NULL;
  82                 wl->tx_frames_cnt--;
  83         }
  84 }
  85 EXPORT_SYMBOL(wl1271_free_tx_id);
  86
  87 static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl,
  88                                                  struct sk_buff *skb)
  89 {
  90         struct ieee80211_hdr *hdr;
  91
  92         /*
  93          * add the station to the known list before transmitting the
  94          * authentication response. this way it won't get de-authed by FW
  95          * when transmitting too soon.
  96          */
  97         hdr = (struct ieee80211_hdr *)(skb->data +
  98                                        sizeof(struct wl1271_tx_hw_descr));
  99         if (ieee80211_is_auth(hdr->frame_control))
 100                 wl1271_acx_set_inconnection_sta(wl, hdr->addr1);
 101 }
 102
 103 static void wl1271_tx_regulate_link(struct wl1271 *wl,
 104                                     struct wl12xx_vif *wlvif,
 105                                     u8 hlid)
 106 {
 107         bool fw_ps, single_sta;
 108         u8 tx_pkts;
 109
 110         if (WARN_ON(!test_bit(hlid, wlvif->links_map)))
 111                 return;
 112
 113         fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map);
 114         tx_pkts = wl->links[hlid].allocated_pkts;
 115         single_sta = (wl->active_sta_count == 1);
 116
 117         /*
 118          * if in FW PS and there is enough data in FW we can put the link
 119          * into high-level PS and clean out its TX queues.
 120          * Make an exception if this is the only connected station. In this
 121          * case FW-memory congestion is not a problem.
 122          */
 123         if (!single_sta && fw_ps && tx_pkts >= WL1271_PS_STA_MAX_PACKETS)
 124                 wl12xx_ps_link_start(wl, wlvif, hlid, true);
 125 }
 126
 127 bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb)
 128 {
 129         return wl->dummy_packet == skb;
 130 }
 131 EXPORT_SYMBOL(wl12xx_is_dummy_packet);
 132
 133 u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 134                          struct sk_buff *skb)
 135 {
 136         struct ieee80211_tx_info *control = IEEE80211_SKB_CB(skb);
 137
 138         if (control->control.sta) {
 139                 struct wl1271_station *wl_sta;
 140
 141                 wl_sta = (struct wl1271_station *)
 142                                 control->control.sta->drv_priv;
 143                 return wl_sta->hlid;
 144         } else {
 145                 struct ieee80211_hdr *hdr;
 146
 147                 if (!test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags))
 148                         return wl->system_hlid;
 149
 150                 hdr = (struct ieee80211_hdr *)skb->data;
 151                 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
 152                         return wlvif->ap.bcast_hlid;
 153                 else
 154                         return wlvif->ap.global_hlid;
 155         }
 156 }
 157
 158 u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 159                       struct sk_buff *skb)
 160 {
 161         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 162
 163         if (!wlvif || wl12xx_is_dummy_packet(wl, skb))
 164                 return wl->system_hlid;
 165
 166         if (wlvif->bss_type == BSS_TYPE_AP_BSS)
 167                 return wl12xx_tx_get_hlid_ap(wl, wlvif, skb);
 168
 169         if ((test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags) ||
 170              test_bit(WLVIF_FLAG_IBSS_JOINED, &wlvif->flags)) &&
 171             !ieee80211_is_auth(hdr->frame_control) &&
 172             !ieee80211_is_assoc_req(hdr->frame_control))
 173                 return wlvif->sta.hlid;
 174         else
 175                 return wlvif->dev_hlid;
 176 }
 177
 178 unsigned int wlcore_calc_packet_alignment(struct wl1271 *wl,
 179                                           unsigned int packet_length)
 180 {
 181         if ((wl->quirks & WLCORE_QUIRK_TX_PAD_LAST_FRAME) ||
 182             !(wl->quirks & WLCORE_QUIRK_TX_BLOCKSIZE_ALIGN))
 183                 return ALIGN(packet_length, WL1271_TX_ALIGN_TO);
 184         else
 185                 return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE);
 186 }
 187 EXPORT_SYMBOL(wlcore_calc_packet_alignment);
 188
 189 static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 190                               struct sk_buff *skb, u32 extra, u32 buf_offset,
 191                               u8 hlid, bool is_gem)
 192 {
 193         struct wl1271_tx_hw_descr *desc;
 194         u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
 195         u32 total_blocks;
 196         int id, ret = -EBUSY, ac;
 197         u32 spare_blocks;
 198
 199         if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE)
 200                 return -EAGAIN;
 201
 202         spare_blocks = wlcore_hw_get_spare_blocks(wl, is_gem);
 203
 204         /* allocate free identifier for the packet */
 205         id = wl1271_alloc_tx_id(wl, skb);
 206         if (id < 0)
 207                 return id;
 208
 209         total_blocks = wlcore_hw_calc_tx_blocks(wl, total_len, spare_blocks);
 210
 211         if (total_blocks <= wl->tx_blocks_available) {
 212                 desc = (struct wl1271_tx_hw_descr *)skb_push(
 213                         skb, total_len - skb->len);
 214
 215                 wlcore_hw_set_tx_desc_blocks(wl, desc, total_blocks,
 216                                              spare_blocks);
 217
 218                 desc->id = id;
 219
 220                 wl->tx_blocks_available -= total_blocks;
 221                 wl->tx_allocated_blocks += total_blocks;
 222
 223                 /* If the FW was empty before, arm the Tx watchdog */
 224                 if (wl->tx_allocated_blocks == total_blocks)
 225                         wl12xx_rearm_tx_watchdog_locked(wl);
 226
 227                 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
 228                 wl->tx_allocated_pkts[ac]++;
 229
 230                 if (!wl12xx_is_dummy_packet(wl, skb) && wlvif &&
 231                     wlvif->bss_type == BSS_TYPE_AP_BSS &&
 232                     test_bit(hlid, wlvif->ap.sta_hlid_map))
 233                         wl->links[hlid].allocated_pkts++;
 234
 235                 ret = 0;
 236
 237                 wl1271_debug(DEBUG_TX,
 238                              "tx_allocate: size: %d, blocks: %d, id: %d",
 239                              total_len, total_blocks, id);
 240         } else {
 241                 wl1271_free_tx_id(wl, id);
 242         }
 243
 244         return ret;
 245 }
 246
 247 static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 248                                struct sk_buff *skb, u32 extra,
 249                                struct ieee80211_tx_info *control, u8 hlid)
 250 {
 251         struct timespec ts;
 252         struct wl1271_tx_hw_descr *desc;
 253         int ac, rate_idx;
 254         s64 hosttime;
 255         u16 tx_attr = 0;
 256         __le16 frame_control;
 257         struct ieee80211_hdr *hdr;
 258         u8 *frame_start;
 259         bool is_dummy;
 260
 261         desc = (struct wl1271_tx_hw_descr *) skb->data;
 262         frame_start = (u8 *)(desc + 1);
 263         hdr = (struct ieee80211_hdr *)(frame_start + extra);
 264         frame_control = hdr->frame_control;
 265
 266         /* relocate space for security header */
 267         if (extra) {
 268                 int hdrlen = ieee80211_hdrlen(frame_control);
 269                 memmove(frame_start, hdr, hdrlen);
 270                 skb_set_network_header(skb, skb_network_offset(skb) + extra);
 271         }
 272
 273         /* configure packet life time */
 274         getnstimeofday(&ts);
 275         hosttime = (timespec_to_ns(&ts) >> 10);
 276         desc->start_time = cpu_to_le32(hosttime - wl->time_offset);
 277
 278         is_dummy = wl12xx_is_dummy_packet(wl, skb);
 279         if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS)
 280                 desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU);
 281         else
 282                 desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU);
 283
 284         /* queue */
 285         ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
 286         desc->tid = skb->priority;
 287
 288         if (is_dummy) {
 289                 /*
 290                  * FW expects the dummy packet to have an invalid session id -
 291                  * any session id that is different than the one set in the join
 292                  */
 293                 tx_attr = (SESSION_COUNTER_INVALID <<
 294                            TX_HW_ATTR_OFST_SESSION_COUNTER) &
 295                            TX_HW_ATTR_SESSION_COUNTER;
 296
 297                 tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ;
 298         } else if (wlvif) {
 299                 /* configure the tx attributes */
 300                 tx_attr = wlvif->session_counter <<
 301                           TX_HW_ATTR_OFST_SESSION_COUNTER;
 302         }
 303
 304         desc->hlid = hlid;
 305         if (is_dummy || !wlvif)
 306                 rate_idx = 0;
 307         else if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
 308                 /*
 309                  * if the packets are data packets
 310                  * send them with AP rate policies (EAPOLs are an exception),
 311                  * otherwise use default basic rates
 312                  */
 313                 if (skb->protocol == cpu_to_be16(ETH_P_PAE))
 314                         rate_idx = wlvif->sta.basic_rate_idx;
 315                 else if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE)
 316                         rate_idx = wlvif->sta.p2p_rate_idx;
 317                 else if (ieee80211_is_data(frame_control))
 318                         rate_idx = wlvif->sta.ap_rate_idx;
 319                 else
 320                         rate_idx = wlvif->sta.basic_rate_idx;
 321         } else {
 322                 if (hlid == wlvif->ap.global_hlid)
 323                         rate_idx = wlvif->ap.mgmt_rate_idx;
 324                 else if (hlid == wlvif->ap.bcast_hlid ||
 325                          skb->protocol == cpu_to_be16(ETH_P_PAE))
 326                         /* send AP bcast and EAPOLs using the min basic rate */
 327                         rate_idx = wlvif->ap.bcast_rate_idx;
 328                 else
 329                         rate_idx = wlvif->ap.ucast_rate_idx[ac];
 330         }
 331
 332         tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY;
 333
 334         /* for WEP shared auth - no fw encryption is needed */
 335         if (ieee80211_is_auth(frame_control) &&
 336             ieee80211_has_protected(frame_control))
 337                 tx_attr |= TX_HW_ATTR_HOST_ENCRYPT;
 338
 339         desc->tx_attr = cpu_to_le16(tx_attr);
 340
 341         wlcore_hw_set_tx_desc_csum(wl, desc, skb);
 342         wlcore_hw_set_tx_desc_data_len(wl, desc, skb);
 343 }
 344
 345 /* caller must hold wl->mutex */
 346 static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 347                                    struct sk_buff *skb, u32 buf_offset)
 348 {
 349         struct ieee80211_tx_info *info;
 350         u32 extra = 0;
 351         int ret = 0;
 352         u32 total_len;
 353         u8 hlid;
 354         bool is_dummy;
 355         bool is_gem = false;
 356
 357         if (!skb) {
 358                 wl1271_error("discarding null skb");
 359                 return -EINVAL;
 360         }
 361
 362         info = IEEE80211_SKB_CB(skb);
 363
 364         /* TODO: handle dummy packets on multi-vifs */
 365         is_dummy = wl12xx_is_dummy_packet(wl, skb);
 366
 367         if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
 368             info->control.hw_key &&
 369             info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
 370                 extra = WL1271_EXTRA_SPACE_TKIP;
 371
 372         if (info->control.hw_key) {
 373                 bool is_wep;
 374                 u8 idx = info->control.hw_key->hw_key_idx;
 375                 u32 cipher = info->control.hw_key->cipher;
 376
 377                 is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) ||
 378                          (cipher == WLAN_CIPHER_SUITE_WEP104);
 379
 380                 if (unlikely(is_wep && wlvif->default_key != idx)) {
 381                         ret = wl1271_set_default_wep_key(wl, wlvif, idx);
 382                         if (ret < 0)
 383                                 return ret;
 384                         wlvif->default_key = idx;
 385                 }
 386
 387                 is_gem = (cipher == WL1271_CIPHER_SUITE_GEM);
 388         }
 389         hlid = wl12xx_tx_get_hlid(wl, wlvif, skb);
 390         if (hlid == WL12XX_INVALID_LINK_ID) {
 391                 wl1271_error("invalid hlid. dropping skb 0x%p", skb);
 392                 return -EINVAL;
 393         }
 394
 395         ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid,
 396                                  is_gem);
 397         if (ret < 0)
 398                 return ret;
 399
 400         wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid);
 401
 402         if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) {
 403                 wl1271_tx_ap_update_inconnection_sta(wl, skb);
 404                 wl1271_tx_regulate_link(wl, wlvif, hlid);
 405         }
 406
 407         /*
 408          * The length of each packet is stored in terms of
 409          * words. Thus, we must pad the skb data to make sure its
 410          * length is aligned.  The number of padding bytes is computed
 411          * and set in wl1271_tx_fill_hdr.
 412          * In special cases, we want to align to a specific block size
 413          * (eg. for wl128x with SDIO we align to 256).
 414          */
 415         total_len = wlcore_calc_packet_alignment(wl, skb->len);
 416
 417         memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len);
 418         memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len);
 419
 420         /* Revert side effects in the dummy packet skb, so it can be reused */
 421         if (is_dummy)
 422                 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
 423
 424         return total_len;
 425 }
 426
 427 u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set,
 428                                 enum ieee80211_band rate_band)
 429 {
 430         struct ieee80211_supported_band *band;
 431         u32 enabled_rates = 0;
 432         int bit;
 433
 434         band = wl->hw->wiphy->bands[rate_band];
 435         for (bit = 0; bit < band->n_bitrates; bit++) {
 436                 if (rate_set & 0x1)
 437                         enabled_rates |= band->bitrates[bit].hw_value;
 438                 rate_set >>= 1;
 439         }
 440
 441         /* MCS rates indication are on bits 16 - 31 */
 442         rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates;
 443
 444         for (bit = 0; bit < 16; bit++) {
 445                 if (rate_set & 0x1)
 446                         enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit);
 447                 rate_set >>= 1;
 448         }
 449
 450         return enabled_rates;
 451 }
 452
 453 void wl1271_handle_tx_low_watermark(struct wl1271 *wl)
 454 {
 455         int i;
 456
 457         for (i = 0; i < NUM_TX_QUEUES; i++) {
 458                 if (wlcore_is_queue_stopped_by_reason(wl, i,
 459                         WLCORE_QUEUE_STOP_REASON_WATERMARK) &&
 460                     wl->tx_queue_count[i] <= WL1271_TX_QUEUE_LOW_WATERMARK) {
 461                         /* firmware buffer has space, restart queues */
 462                         wlcore_wake_queue(wl, i,
 463                                           WLCORE_QUEUE_STOP_REASON_WATERMARK);
 464                 }
 465         }
 466 }
 467
 468 static struct sk_buff_head *wl1271_select_queue(struct wl1271 *wl,
 469                                                 struct sk_buff_head *queues)
 470 {
 471         int i, q = -1, ac;
 472         u32 min_pkts = 0xffffffff;
 473
 474         /*
 475          * Find a non-empty ac where:
 476          * 1. There are packets to transmit
 477          * 2. The FW has the least allocated blocks
 478          *
 479          * We prioritize the ACs according to VO>VI>BE>BK
 480          */
 481         for (i = 0; i < NUM_TX_QUEUES; i++) {
 482                 ac = wl1271_tx_get_queue(i);
 483                 if (!skb_queue_empty(&queues[ac]) &&
 484                     (wl->tx_allocated_pkts[ac] < min_pkts)) {
 485                         q = ac;
 486                         min_pkts = wl->tx_allocated_pkts[q];
 487                 }
 488         }
 489
 490         if (q == -1)
 491                 return NULL;
 492
 493         return &queues[q];
 494 }
 495
 496 static struct sk_buff *wl12xx_lnk_skb_dequeue(struct wl1271 *wl,
 497                                               struct wl1271_link *lnk)
 498 {
 499         struct sk_buff *skb;
 500         unsigned long flags;
 501         struct sk_buff_head *queue;
 502
 503         queue = wl1271_select_queue(wl, lnk->tx_queue);
 504         if (!queue)
 505                 return NULL;
 506
 507         skb = skb_dequeue(queue);
 508         if (skb) {
 509                 int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
 510                 spin_lock_irqsave(&wl->wl_lock, flags);
 511                 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
 512                 wl->tx_queue_count[q]--;
 513                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 514         }
 515
 516         return skb;
 517 }
 518
 519 static struct sk_buff *wl12xx_vif_skb_dequeue(struct wl1271 *wl,
 520                                               struct wl12xx_vif *wlvif)
 521 {
 522         struct sk_buff *skb = NULL;
 523         int i, h, start_hlid;
 524
 525         /* start from the link after the last one */
 526         start_hlid = (wlvif->last_tx_hlid + 1) % WL12XX_MAX_LINKS;
 527
 528         /* dequeue according to AC, round robin on each link */
 529         for (i = 0; i < WL12XX_MAX_LINKS; i++) {
 530                 h = (start_hlid + i) % WL12XX_MAX_LINKS;
 531
 532                 /* only consider connected stations */
 533                 if (!test_bit(h, wlvif->links_map))
 534                         continue;
 535
 536                 skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[h]);
 537                 if (!skb)
 538                         continue;
 539
 540                 wlvif->last_tx_hlid = h;
 541                 break;
 542         }
 543
 544         if (!skb)
 545                 wlvif->last_tx_hlid = 0;
 546
 547         return skb;
 548 }
 549
 550 static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl)
 551 {
 552         unsigned long flags;
 553         struct wl12xx_vif *wlvif = wl->last_wlvif;
 554         struct sk_buff *skb = NULL;
 555
 556         /* continue from last wlvif (round robin) */
 557         if (wlvif) {
 558                 wl12xx_for_each_wlvif_continue(wl, wlvif) {
 559                         skb = wl12xx_vif_skb_dequeue(wl, wlvif);
 560                         if (skb) {
 561                                 wl->last_wlvif = wlvif;
 562                                 break;
 563                         }
 564                 }
 565         }
 566
 567         /* dequeue from the system HLID before the restarting wlvif list */
 568         if (!skb)
 569                 skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[wl->system_hlid]);
 570
 571         /* do a new pass over the wlvif list */
 572         if (!skb) {
 573                 wl12xx_for_each_wlvif(wl, wlvif) {
 574                         skb = wl12xx_vif_skb_dequeue(wl, wlvif);
 575                         if (skb) {
 576                                 wl->last_wlvif = wlvif;
 577                                 break;
 578                         }
 579
 580                         /*
 581                          * No need to continue after last_wlvif. The previous
 582                          * pass should have found it.
 583                          */
 584                         if (wlvif == wl->last_wlvif)
 585                                 break;
 586                 }
 587         }
 588
 589         if (!skb &&
 590             test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) {
 591                 int q;
 592
 593                 skb = wl->dummy_packet;
 594                 q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
 595                 spin_lock_irqsave(&wl->wl_lock, flags);
 596                 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
 597                 wl->tx_queue_count[q]--;
 598                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 599         }
 600
 601         return skb;
 602 }
 603
 604 static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 605                                   struct sk_buff *skb)
 606 {
 607         unsigned long flags;
 608         int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
 609
 610         if (wl12xx_is_dummy_packet(wl, skb)) {
 611                 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags);
 612         } else {
 613                 u8 hlid = wl12xx_tx_get_hlid(wl, wlvif, skb);
 614                 skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
 615
 616                 /* make sure we dequeue the same packet next time */
 617                 wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) %
 618                                       WL12XX_MAX_LINKS;
 619         }
 620
 621         spin_lock_irqsave(&wl->wl_lock, flags);
 622         wl->tx_queue_count[q]++;
 623         spin_unlock_irqrestore(&wl->wl_lock, flags);
 624 }
 625
 626 static bool wl1271_tx_is_data_present(struct sk_buff *skb)
 627 {
 628         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 629
 630         return ieee80211_is_data_present(hdr->frame_control);
 631 }
 632
 633 void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids)
 634 {
 635         struct wl12xx_vif *wlvif;
 636         u32 timeout;
 637         u8 hlid;
 638
 639         if (!wl->conf.rx_streaming.interval)
 640                 return;
 641
 642         if (!wl->conf.rx_streaming.always &&
 643             !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))
 644                 return;
 645
 646         timeout = wl->conf.rx_streaming.duration;
 647         wl12xx_for_each_wlvif_sta(wl, wlvif) {
 648                 bool found = false;
 649                 for_each_set_bit(hlid, active_hlids, WL12XX_MAX_LINKS) {
 650                         if (test_bit(hlid, wlvif->links_map)) {
 651                                 found  = true;
 652                                 break;
 653                         }
 654                 }
 655
 656                 if (!found)
 657                         continue;
 658
 659                 /* enable rx streaming */
 660                 if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags))
 661                         ieee80211_queue_work(wl->hw,
 662                                              &wlvif->rx_streaming_enable_work);
 663
 664                 mod_timer(&wlvif->rx_streaming_timer,
 665                           jiffies + msecs_to_jiffies(timeout));
 666         }
 667 }
 668
 669 /*
 670  * Returns failure values only in case of failed bus ops within this function.
 671  * wl1271_prepare_tx_frame retvals won't be returned in order to avoid
 672  * triggering recovery by higher layers when not necessary.
 673  * In case a FW command fails within wl1271_prepare_tx_frame fails a recovery
 674  * will be queued in wl1271_cmd_send. -EAGAIN/-EBUSY from prepare_tx_frame
 675  * can occur and are legitimate so don't propagate. -EINVAL will emit a WARNING
 676  * within prepare_tx_frame code but there's nothing we should do about those
 677  * as well.
 678  */
 679 int wlcore_tx_work_locked(struct wl1271 *wl)
 680 {
 681         struct wl12xx_vif *wlvif;
 682         struct sk_buff *skb;
 683         struct wl1271_tx_hw_descr *desc;
 684         u32 buf_offset = 0, last_len = 0;
 685         bool sent_packets = false;
 686         unsigned long active_hlids[BITS_TO_LONGS(WL12XX_MAX_LINKS)] = {0};
 687         int ret = 0;
 688         int bus_ret = 0;
 689
 690         if (unlikely(wl->state == WL1271_STATE_OFF))
 691                 return 0;
 692
 693         while ((skb = wl1271_skb_dequeue(wl))) {
 694                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 695                 bool has_data = false;
 696
 697                 wlvif = NULL;
 698                 if (!wl12xx_is_dummy_packet(wl, skb) && info->control.vif)
 699                         wlvif = wl12xx_vif_to_data(info->control.vif);
 700
 701                 has_data = wlvif && wl1271_tx_is_data_present(skb);
 702                 ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset);
 703                 if (ret == -EAGAIN) {
 704                         /*
 705                          * Aggregation buffer is full.
 706                          * Flush buffer and try again.
 707                          */
 708                         wl1271_skb_queue_head(wl, wlvif, skb);
 709
 710                         buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset,
 711                                                             last_len);
 712                         bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA,
 713                                              wl->aggr_buf, buf_offset, true);
 714                         if (bus_ret < 0)
 715                                 goto out;
 716
 717                         sent_packets = true;
 718                         buf_offset = 0;
 719                         continue;
 720                 } else if (ret == -EBUSY) {
 721                         /*
 722                          * Firmware buffer is full.
 723                          * Queue back last skb, and stop aggregating.
 724                          */
 725                         wl1271_skb_queue_head(wl, wlvif, skb);
 726                         /* No work left, avoid scheduling redundant tx work */
 727                         set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
 728                         goto out_ack;
 729                 } else if (ret < 0) {
 730                         if (wl12xx_is_dummy_packet(wl, skb))
 731                                 /*
 732                                  * fw still expects dummy packet,
 733                                  * so re-enqueue it
 734                                  */
 735                                 wl1271_skb_queue_head(wl, wlvif, skb);
 736                         else
 737                                 ieee80211_free_txskb(wl->hw, skb);
 738                         goto out_ack;
 739                 }
 740                 last_len = ret;
 741                 buf_offset += last_len;
 742                 wl->tx_packets_count++;
 743                 if (has_data) {
 744                         desc = (struct wl1271_tx_hw_descr *) skb->data;
 745                         __set_bit(desc->hlid, active_hlids);
 746                 }
 747         }
 748
 749 out_ack:
 750         if (buf_offset) {
 751                 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset, last_len);
 752                 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf,
 753                                              buf_offset, true);
 754                 if (bus_ret < 0)
 755                         goto out;
 756
 757                 sent_packets = true;
 758         }
 759         if (sent_packets) {
 760                 /*
 761                  * Interrupt the firmware with the new packets. This is only
 762                  * required for older hardware revisions
 763                  */
 764                 if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION) {
 765                         bus_ret = wlcore_write32(wl, WL12XX_HOST_WR_ACCESS,
 766                                              wl->tx_packets_count);
 767                         if (bus_ret < 0)
 768                                 goto out;
 769                 }
 770
 771                 wl1271_handle_tx_low_watermark(wl);
 772         }
 773         wl12xx_rearm_rx_streaming(wl, active_hlids);
 774
 775 out:
 776         return bus_ret;
 777 }
 778
 779 void wl1271_tx_work(struct work_struct *work)
 780 {
 781         struct wl1271 *wl = container_of(work, struct wl1271, tx_work);
 782         int ret;
 783
 784         mutex_lock(&wl->mutex);
 785         ret = wl1271_ps_elp_wakeup(wl);
 786         if (ret < 0)
 787                 goto out;
 788
 789         ret = wlcore_tx_work_locked(wl);
 790         if (ret < 0) {
 791                 wl12xx_queue_recovery_work(wl);
 792                 goto out;
 793         }
 794
 795         wl1271_ps_elp_sleep(wl);
 796 out:
 797         mutex_unlock(&wl->mutex);
 798 }
 799
 800 static u8 wl1271_tx_get_rate_flags(u8 rate_class_index)
 801 {
 802         u8 flags = 0;
 803
 804         /*
 805          * TODO: use wl12xx constants when this code is moved to wl12xx, as
 806          * only it uses Tx-completion.
 807          */
 808         if (rate_class_index <= 8)
 809                 flags |= IEEE80211_TX_RC_MCS;
 810
 811         /*
 812          * TODO: use wl12xx constants when this code is moved to wl12xx, as
 813          * only it uses Tx-completion.
 814          */
 815         if (rate_class_index == 0)
 816                 flags |= IEEE80211_TX_RC_SHORT_GI;
 817
 818         return flags;
 819 }
 820
 821 static void wl1271_tx_complete_packet(struct wl1271 *wl,
 822                                       struct wl1271_tx_hw_res_descr *result)
 823 {
 824         struct ieee80211_tx_info *info;
 825         struct ieee80211_vif *vif;
 826         struct wl12xx_vif *wlvif;
 827         struct sk_buff *skb;
 828         int id = result->id;
 829         int rate = -1;
 830         u8 rate_flags = 0;
 831         u8 retries = 0;
 832
 833         /* check for id legality */
 834         if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) {
 835                 wl1271_warning("TX result illegal id: %d", id);
 836                 return;
 837         }
 838
 839         skb = wl->tx_frames[id];
 840         info = IEEE80211_SKB_CB(skb);
 841
 842         if (wl12xx_is_dummy_packet(wl, skb)) {
 843                 wl1271_free_tx_id(wl, id);
 844                 return;
 845         }
 846
 847         /* info->control is valid as long as we don't update info->status */
 848         vif = info->control.vif;
 849         wlvif = wl12xx_vif_to_data(vif);
 850
 851         /* update the TX status info */
 852         if (result->status == TX_SUCCESS) {
 853                 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 854                         info->flags |= IEEE80211_TX_STAT_ACK;
 855                 rate = wlcore_rate_to_idx(wl, result->rate_class_index,
 856                                           wlvif->band);
 857                 rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index);
 858                 retries = result->ack_failures;
 859         } else if (result->status == TX_RETRY_EXCEEDED) {
 860                 wl->stats.excessive_retries++;
 861                 retries = result->ack_failures;
 862         }
 863
 864         info->status.rates[0].idx = rate;
 865         info->status.rates[0].count = retries;
 866         info->status.rates[0].flags = rate_flags;
 867         info->status.ack_signal = -1;
 868
 869         wl->stats.retry_count += result->ack_failures;
 870
 871         /*
 872          * update sequence number only when relevant, i.e. only in
 873          * sessions of TKIP, AES and GEM (not in open or WEP sessions)
 874          */
 875         if (info->control.hw_key &&
 876             (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP ||
 877              info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP ||
 878              info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) {
 879                 u8 fw_lsb = result->tx_security_sequence_number_lsb;
 880                 u8 cur_lsb = wlvif->tx_security_last_seq_lsb;
 881
 882                 /*
 883                  * update security sequence number, taking care of potential
 884                  * wrap-around
 885                  */
 886                 wlvif->tx_security_seq += (fw_lsb - cur_lsb) & 0xff;
 887                 wlvif->tx_security_last_seq_lsb = fw_lsb;
 888         }
 889
 890         /* remove private header from packet */
 891         skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
 892
 893         /* remove TKIP header space if present */
 894         if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
 895             info->control.hw_key &&
 896             info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
 897                 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 898                 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data,
 899                         hdrlen);
 900                 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
 901         }
 902
 903         wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
 904                      " status 0x%x",
 905                      result->id, skb, result->ack_failures,
 906                      result->rate_class_index, result->status);
 907
 908         /* return the packet to the stack */
 909         skb_queue_tail(&wl->deferred_tx_queue, skb);
 910         queue_work(wl->freezable_wq, &wl->netstack_work);
 911         wl1271_free_tx_id(wl, result->id);
 912 }
 913
 914 /* Called upon reception of a TX complete interrupt */
 915 int wlcore_tx_complete(struct wl1271 *wl)
 916 {
 917         struct wl1271_acx_mem_map *memmap = wl->target_mem_map;
 918         u32 count, fw_counter;
 919         u32 i;
 920         int ret;
 921
 922         /* read the tx results from the chipset */
 923         ret = wlcore_read(wl, le32_to_cpu(memmap->tx_result),
 924                           wl->tx_res_if, sizeof(*wl->tx_res_if), false);
 925         if (ret < 0)
 926                 goto out;
 927
 928         fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter);
 929
 930         /* write host counter to chipset (to ack) */
 931         ret = wlcore_write32(wl, le32_to_cpu(memmap->tx_result) +
 932                              offsetof(struct wl1271_tx_hw_res_if,
 933                                       tx_result_host_counter), fw_counter);
 934         if (ret < 0)
 935                 goto out;
 936
 937         count = fw_counter - wl->tx_results_count;
 938         wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count);
 939
 940         /* verify that the result buffer is not getting overrun */
 941         if (unlikely(count > TX_HW_RESULT_QUEUE_LEN))
 942                 wl1271_warning("TX result overflow from chipset: %d", count);
 943
 944         /* process the results */
 945         for (i = 0; i < count; i++) {
 946                 struct wl1271_tx_hw_res_descr *result;
 947                 u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK;
 948
 949                 /* process the packet */
 950                 result =  &(wl->tx_res_if->tx_results_queue[offset]);
 951                 wl1271_tx_complete_packet(wl, result);
 952
 953                 wl->tx_results_count++;
 954         }
 955
 956 out:
 957         return ret;
 958 }
 959 EXPORT_SYMBOL(wlcore_tx_complete);
 960
 961 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
 962 {
 963         struct sk_buff *skb;
 964         int i;
 965         unsigned long flags;
 966         struct ieee80211_tx_info *info;
 967         int total[NUM_TX_QUEUES];
 968
 969         for (i = 0; i < NUM_TX_QUEUES; i++) {
 970                 total[i] = 0;
 971                 while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) {
 972                         wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb);
 973
 974                         if (!wl12xx_is_dummy_packet(wl, skb)) {
 975                                 info = IEEE80211_SKB_CB(skb);
 976                                 info->status.rates[0].idx = -1;
 977                                 info->status.rates[0].count = 0;
 978                                 ieee80211_tx_status_ni(wl->hw, skb);
 979                         }
 980
 981                         total[i]++;
 982                 }
 983         }
 984
 985         spin_lock_irqsave(&wl->wl_lock, flags);
 986         for (i = 0; i < NUM_TX_QUEUES; i++)
 987                 wl->tx_queue_count[i] -= total[i];
 988         spin_unlock_irqrestore(&wl->wl_lock, flags);
 989
 990         wl1271_handle_tx_low_watermark(wl);
 991 }
 992
 993 /* caller must hold wl->mutex and TX must be stopped */
 994 void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 995 {
 996         int i;
 997
 998         /* TX failure */
 999         for_each_set_bit(i, wlvif->links_map, WL12XX_MAX_LINKS) {
1000                 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
1001                         wl1271_free_sta(wl, wlvif, i);
1002                 else
1003                         wlvif->sta.ba_rx_bitmap = 0;
1004
1005                 wl->links[i].allocated_pkts = 0;
1006                 wl->links[i].prev_freed_pkts = 0;
1007         }
1008         wlvif->last_tx_hlid = 0;
1009
1010 }
1011 /* caller must hold wl->mutex and TX must be stopped */
1012 void wl12xx_tx_reset(struct wl1271 *wl)
1013 {
1014         int i;
1015         struct sk_buff *skb;
1016         struct ieee80211_tx_info *info;
1017
1018         /* only reset the queues if something bad happened */
1019         if (WARN_ON_ONCE(wl1271_tx_total_queue_count(wl) != 0)) {
1020                 for (i = 0; i < WL12XX_MAX_LINKS; i++)
1021                         wl1271_tx_reset_link_queues(wl, i);
1022
1023                 for (i = 0; i < NUM_TX_QUEUES; i++)
1024                         wl->tx_queue_count[i] = 0;
1025         }
1026
1027         /*
1028          * Make sure the driver is at a consistent state, in case this
1029          * function is called from a context other than interface removal.
1030          * This call will always wake the TX queues.
1031          */
1032         wl1271_handle_tx_low_watermark(wl);
1033
1034         for (i = 0; i < wl->num_tx_desc; i++) {
1035                 if (wl->tx_frames[i] == NULL)
1036                         continue;
1037
1038                 skb = wl->tx_frames[i];
1039                 wl1271_free_tx_id(wl, i);
1040                 wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb);
1041
1042                 if (!wl12xx_is_dummy_packet(wl, skb)) {
1043                         /*
1044                          * Remove private headers before passing the skb to
1045                          * mac80211
1046                          */
1047                         info = IEEE80211_SKB_CB(skb);
1048                         skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
1049                         if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
1050                             info->control.hw_key &&
1051                             info->control.hw_key->cipher ==
1052                             WLAN_CIPHER_SUITE_TKIP) {
1053                                 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1054                                 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP,
1055                                         skb->data, hdrlen);
1056                                 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
1057                         }
1058
1059                         info->status.rates[0].idx = -1;
1060                         info->status.rates[0].count = 0;
1061
1062                         ieee80211_tx_status_ni(wl->hw, skb);
1063                 }
1064         }
1065 }
1066
1067 #define WL1271_TX_FLUSH_TIMEOUT 500000
1068
1069 /* caller must *NOT* hold wl->mutex */
1070 void wl1271_tx_flush(struct wl1271 *wl)
1071 {
1072         unsigned long timeout;
1073         int i;
1074         timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
1075
1076         /* only one flush should be in progress, for consistent queue state */
1077         mutex_lock(&wl->flush_mutex);
1078
1079         wlcore_stop_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1080
1081         while (!time_after(jiffies, timeout)) {
1082                 mutex_lock(&wl->mutex);
1083                 wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d",
1084                              wl->tx_frames_cnt,
1085                              wl1271_tx_total_queue_count(wl));
1086                 if ((wl->tx_frames_cnt == 0) &&
1087                     (wl1271_tx_total_queue_count(wl) == 0)) {
1088                         mutex_unlock(&wl->mutex);
1089                         goto out;
1090                 }
1091                 mutex_unlock(&wl->mutex);
1092                 msleep(1);
1093         }
1094
1095         wl1271_warning("Unable to flush all TX buffers, timed out.");
1096
1097         /* forcibly flush all Tx buffers on our queues */
1098         mutex_lock(&wl->mutex);
1099         for (i = 0; i < WL12XX_MAX_LINKS; i++)
1100                 wl1271_tx_reset_link_queues(wl, i);
1101         mutex_unlock(&wl->mutex);
1102
1103 out:
1104         wlcore_wake_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1105         mutex_unlock(&wl->flush_mutex);
1106 }
1107 EXPORT_SYMBOL_GPL(wl1271_tx_flush);
1108
1109 u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set)
1110 {
1111         if (WARN_ON(!rate_set))
1112                 return 0;
1113
1114         return BIT(__ffs(rate_set));
1115 }
1116
1117 void wlcore_stop_queue_locked(struct wl1271 *wl, u8 queue,
1118                               enum wlcore_queue_stop_reason reason)
1119 {
1120         bool stopped = !!wl->queue_stop_reasons[queue];
1121
1122         /* queue should not be stopped for this reason */
1123         WARN_ON(test_and_set_bit(reason, &wl->queue_stop_reasons[queue]));
1124
1125         if (stopped)
1126                 return;
1127
1128         ieee80211_stop_queue(wl->hw, wl1271_tx_get_mac80211_queue(queue));
1129 }
1130
1131 void wlcore_stop_queue(struct wl1271 *wl, u8 queue,
1132                        enum wlcore_queue_stop_reason reason)
1133 {
1134         unsigned long flags;
1135
1136         spin_lock_irqsave(&wl->wl_lock, flags);
1137         wlcore_stop_queue_locked(wl, queue, reason);
1138         spin_unlock_irqrestore(&wl->wl_lock, flags);
1139 }
1140
1141 void wlcore_wake_queue(struct wl1271 *wl, u8 queue,
1142                        enum wlcore_queue_stop_reason reason)
1143 {
1144         unsigned long flags;
1145
1146         spin_lock_irqsave(&wl->wl_lock, flags);
1147
1148         /* queue should not be clear for this reason */
1149         WARN_ON(!test_and_clear_bit(reason, &wl->queue_stop_reasons[queue]));
1150
1151         if (wl->queue_stop_reasons[queue])
1152                 goto out;
1153
1154         ieee80211_wake_queue(wl->hw, wl1271_tx_get_mac80211_queue(queue));
1155
1156 out:
1157         spin_unlock_irqrestore(&wl->wl_lock, flags);
1158 }
1159
1160 void wlcore_stop_queues(struct wl1271 *wl,
1161                         enum wlcore_queue_stop_reason reason)
1162 {
1163         int i;
1164
1165         for (i = 0; i < NUM_TX_QUEUES; i++)
1166                 wlcore_stop_queue(wl, i, reason);
1167 }
1168 EXPORT_SYMBOL_GPL(wlcore_stop_queues);
1169
1170 void wlcore_wake_queues(struct wl1271 *wl,
1171                         enum wlcore_queue_stop_reason reason)
1172 {
1173         int i;
1174
1175         for (i = 0; i < NUM_TX_QUEUES; i++)
1176                 wlcore_wake_queue(wl, i, reason);
1177 }
1178 EXPORT_SYMBOL_GPL(wlcore_wake_queues);
1179
1180 void wlcore_reset_stopped_queues(struct wl1271 *wl)
1181 {
1182         int i;
1183         unsigned long flags;
1184
1185         spin_lock_irqsave(&wl->wl_lock, flags);
1186
1187         for (i = 0; i < NUM_TX_QUEUES; i++) {
1188                 if (!wl->queue_stop_reasons[i])
1189                         continue;
1190
1191                 wl->queue_stop_reasons[i] = 0;
1192                 ieee80211_wake_queue(wl->hw,
1193                                      wl1271_tx_get_mac80211_queue(i));
1194         }
1195
1196         spin_unlock_irqrestore(&wl->wl_lock, flags);
1197 }
1198
1199 bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl, u8 queue,
1200                              enum wlcore_queue_stop_reason reason)
1201 {
1202         return test_bit(reason, &wl->queue_stop_reasons[queue]);
1203 }
1204
1205 bool wlcore_is_queue_stopped(struct wl1271 *wl, u8 queue)
1206 {
1207         return !!wl->queue_stop_reasons[queue];
1208 }