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 destined for AP (have a STA entry)
 310                  * send them with AP rate policies (EAPOLs are an exception),
 311                  * otherwise use default basic rates
 312                  */
 313                 if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE)
 314                         rate_idx = wlvif->sta.p2p_rate_idx;
 315                 else if (skb->protocol == cpu_to_be16(ETH_P_PAE))
 316                         rate_idx = wlvif->sta.basic_rate_idx;
 317                 else if (control->control.sta)
 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                         rate_idx = wlvif->ap.bcast_rate_idx;
 326                 else
 327                         rate_idx = wlvif->ap.ucast_rate_idx[ac];
 328         }
 329
 330         tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY;
 331
 332         /* for WEP shared auth - no fw encryption is needed */
 333         if (ieee80211_is_auth(frame_control) &&
 334             ieee80211_has_protected(frame_control))
 335                 tx_attr |= TX_HW_ATTR_HOST_ENCRYPT;
 336
 337         desc->tx_attr = cpu_to_le16(tx_attr);
 338
 339         wlcore_hw_set_tx_desc_csum(wl, desc, skb);
 340         wlcore_hw_set_tx_desc_data_len(wl, desc, skb);
 341 }
 342
 343 /* caller must hold wl->mutex */
 344 static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 345                                    struct sk_buff *skb, u32 buf_offset)
 346 {
 347         struct ieee80211_tx_info *info;
 348         u32 extra = 0;
 349         int ret = 0;
 350         u32 total_len;
 351         u8 hlid;
 352         bool is_dummy;
 353         bool is_gem = false;
 354
 355         if (!skb) {
 356                 wl1271_error("discarding null skb");
 357                 return -EINVAL;
 358         }
 359
 360         info = IEEE80211_SKB_CB(skb);
 361
 362         /* TODO: handle dummy packets on multi-vifs */
 363         is_dummy = wl12xx_is_dummy_packet(wl, skb);
 364
 365         if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
 366             info->control.hw_key &&
 367             info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
 368                 extra = WL1271_EXTRA_SPACE_TKIP;
 369
 370         if (info->control.hw_key) {
 371                 bool is_wep;
 372                 u8 idx = info->control.hw_key->hw_key_idx;
 373                 u32 cipher = info->control.hw_key->cipher;
 374
 375                 is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) ||
 376                          (cipher == WLAN_CIPHER_SUITE_WEP104);
 377
 378                 if (unlikely(is_wep && wlvif->default_key != idx)) {
 379                         ret = wl1271_set_default_wep_key(wl, wlvif, idx);
 380                         if (ret < 0)
 381                                 return ret;
 382                         wlvif->default_key = idx;
 383                 }
 384
 385                 is_gem = (cipher == WL1271_CIPHER_SUITE_GEM);
 386         }
 387         hlid = wl12xx_tx_get_hlid(wl, wlvif, skb);
 388         if (hlid == WL12XX_INVALID_LINK_ID) {
 389                 wl1271_error("invalid hlid. dropping skb 0x%p", skb);
 390                 return -EINVAL;
 391         }
 392
 393         ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid,
 394                                  is_gem);
 395         if (ret < 0)
 396                 return ret;
 397
 398         wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid);
 399
 400         if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) {
 401                 wl1271_tx_ap_update_inconnection_sta(wl, skb);
 402                 wl1271_tx_regulate_link(wl, wlvif, hlid);
 403         }
 404
 405         /*
 406          * The length of each packet is stored in terms of
 407          * words. Thus, we must pad the skb data to make sure its
 408          * length is aligned.  The number of padding bytes is computed
 409          * and set in wl1271_tx_fill_hdr.
 410          * In special cases, we want to align to a specific block size
 411          * (eg. for wl128x with SDIO we align to 256).
 412          */
 413         total_len = wlcore_calc_packet_alignment(wl, skb->len);
 414
 415         memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len);
 416         memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len);
 417
 418         /* Revert side effects in the dummy packet skb, so it can be reused */
 419         if (is_dummy)
 420                 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
 421
 422         return total_len;
 423 }
 424
 425 u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set,
 426                                 enum ieee80211_band rate_band)
 427 {
 428         struct ieee80211_supported_band *band;
 429         u32 enabled_rates = 0;
 430         int bit;
 431
 432         band = wl->hw->wiphy->bands[rate_band];
 433         for (bit = 0; bit < band->n_bitrates; bit++) {
 434                 if (rate_set & 0x1)
 435                         enabled_rates |= band->bitrates[bit].hw_value;
 436                 rate_set >>= 1;
 437         }
 438
 439         /* MCS rates indication are on bits 16 - 31 */
 440         rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates;
 441
 442         for (bit = 0; bit < 16; bit++) {
 443                 if (rate_set & 0x1)
 444                         enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit);
 445                 rate_set >>= 1;
 446         }
 447
 448         return enabled_rates;
 449 }
 450
 451 void wl1271_handle_tx_low_watermark(struct wl1271 *wl)
 452 {
 453         int i;
 454
 455         for (i = 0; i < NUM_TX_QUEUES; i++) {
 456                 if (wlcore_is_queue_stopped_by_reason(wl, i,
 457                         WLCORE_QUEUE_STOP_REASON_WATERMARK) &&
 458                     wl->tx_queue_count[i] <= WL1271_TX_QUEUE_LOW_WATERMARK) {
 459                         /* firmware buffer has space, restart queues */
 460                         wlcore_wake_queue(wl, i,
 461                                           WLCORE_QUEUE_STOP_REASON_WATERMARK);
 462                 }
 463         }
 464 }
 465
 466 static struct sk_buff_head *wl1271_select_queue(struct wl1271 *wl,
 467                                                 struct sk_buff_head *queues)
 468 {
 469         int i, q = -1, ac;
 470         u32 min_pkts = 0xffffffff;
 471
 472         /*
 473          * Find a non-empty ac where:
 474          * 1. There are packets to transmit
 475          * 2. The FW has the least allocated blocks
 476          *
 477          * We prioritize the ACs according to VO>VI>BE>BK
 478          */
 479         for (i = 0; i < NUM_TX_QUEUES; i++) {
 480                 ac = wl1271_tx_get_queue(i);
 481                 if (!skb_queue_empty(&queues[ac]) &&
 482                     (wl->tx_allocated_pkts[ac] < min_pkts)) {
 483                         q = ac;
 484                         min_pkts = wl->tx_allocated_pkts[q];
 485                 }
 486         }
 487
 488         if (q == -1)
 489                 return NULL;
 490
 491         return &queues[q];
 492 }
 493
 494 static struct sk_buff *wl12xx_lnk_skb_dequeue(struct wl1271 *wl,
 495                                               struct wl1271_link *lnk)
 496 {
 497         struct sk_buff *skb;
 498         unsigned long flags;
 499         struct sk_buff_head *queue;
 500
 501         queue = wl1271_select_queue(wl, lnk->tx_queue);
 502         if (!queue)
 503                 return NULL;
 504
 505         skb = skb_dequeue(queue);
 506         if (skb) {
 507                 int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
 508                 spin_lock_irqsave(&wl->wl_lock, flags);
 509                 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
 510                 wl->tx_queue_count[q]--;
 511                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 512         }
 513
 514         return skb;
 515 }
 516
 517 static struct sk_buff *wl12xx_vif_skb_dequeue(struct wl1271 *wl,
 518                                               struct wl12xx_vif *wlvif)
 519 {
 520         struct sk_buff *skb = NULL;
 521         int i, h, start_hlid;
 522
 523         /* start from the link after the last one */
 524         start_hlid = (wlvif->last_tx_hlid + 1) % WL12XX_MAX_LINKS;
 525
 526         /* dequeue according to AC, round robin on each link */
 527         for (i = 0; i < WL12XX_MAX_LINKS; i++) {
 528                 h = (start_hlid + i) % WL12XX_MAX_LINKS;
 529
 530                 /* only consider connected stations */
 531                 if (!test_bit(h, wlvif->links_map))
 532                         continue;
 533
 534                 skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[h]);
 535                 if (!skb)
 536                         continue;
 537
 538                 wlvif->last_tx_hlid = h;
 539                 break;
 540         }
 541
 542         if (!skb)
 543                 wlvif->last_tx_hlid = 0;
 544
 545         return skb;
 546 }
 547
 548 static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl)
 549 {
 550         unsigned long flags;
 551         struct wl12xx_vif *wlvif = wl->last_wlvif;
 552         struct sk_buff *skb = NULL;
 553
 554         /* continue from last wlvif (round robin) */
 555         if (wlvif) {
 556                 wl12xx_for_each_wlvif_continue(wl, wlvif) {
 557                         skb = wl12xx_vif_skb_dequeue(wl, wlvif);
 558                         if (skb) {
 559                                 wl->last_wlvif = wlvif;
 560                                 break;
 561                         }
 562                 }
 563         }
 564
 565         /* dequeue from the system HLID before the restarting wlvif list */
 566         if (!skb)
 567                 skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[wl->system_hlid]);
 568
 569         /* do a new pass over the wlvif list */
 570         if (!skb) {
 571                 wl12xx_for_each_wlvif(wl, wlvif) {
 572                         skb = wl12xx_vif_skb_dequeue(wl, wlvif);
 573                         if (skb) {
 574                                 wl->last_wlvif = wlvif;
 575                                 break;
 576                         }
 577
 578                         /*
 579                          * No need to continue after last_wlvif. The previous
 580                          * pass should have found it.
 581                          */
 582                         if (wlvif == wl->last_wlvif)
 583                                 break;
 584                 }
 585         }
 586
 587         if (!skb &&
 588             test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) {
 589                 int q;
 590
 591                 skb = wl->dummy_packet;
 592                 q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
 593                 spin_lock_irqsave(&wl->wl_lock, flags);
 594                 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
 595                 wl->tx_queue_count[q]--;
 596                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 597         }
 598
 599         return skb;
 600 }
 601
 602 static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 603                                   struct sk_buff *skb)
 604 {
 605         unsigned long flags;
 606         int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
 607
 608         if (wl12xx_is_dummy_packet(wl, skb)) {
 609                 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags);
 610         } else {
 611                 u8 hlid = wl12xx_tx_get_hlid(wl, wlvif, skb);
 612                 skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
 613
 614                 /* make sure we dequeue the same packet next time */
 615                 wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) %
 616                                       WL12XX_MAX_LINKS;
 617         }
 618
 619         spin_lock_irqsave(&wl->wl_lock, flags);
 620         wl->tx_queue_count[q]++;
 621         spin_unlock_irqrestore(&wl->wl_lock, flags);
 622 }
 623
 624 static bool wl1271_tx_is_data_present(struct sk_buff *skb)
 625 {
 626         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 627
 628         return ieee80211_is_data_present(hdr->frame_control);
 629 }
 630
 631 void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids)
 632 {
 633         struct wl12xx_vif *wlvif;
 634         u32 timeout;
 635         u8 hlid;
 636
 637         if (!wl->conf.rx_streaming.interval)
 638                 return;
 639
 640         if (!wl->conf.rx_streaming.always &&
 641             !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))
 642                 return;
 643
 644         timeout = wl->conf.rx_streaming.duration;
 645         wl12xx_for_each_wlvif_sta(wl, wlvif) {
 646                 bool found = false;
 647                 for_each_set_bit(hlid, active_hlids, WL12XX_MAX_LINKS) {
 648                         if (test_bit(hlid, wlvif->links_map)) {
 649                                 found  = true;
 650                                 break;
 651                         }
 652                 }
 653
 654                 if (!found)
 655                         continue;
 656
 657                 /* enable rx streaming */
 658                 if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags))
 659                         ieee80211_queue_work(wl->hw,
 660                                              &wlvif->rx_streaming_enable_work);
 661
 662                 mod_timer(&wlvif->rx_streaming_timer,
 663                           jiffies + msecs_to_jiffies(timeout));
 664         }
 665 }
 666
 667 /*
 668  * Returns failure values only in case of failed bus ops within this function.
 669  * wl1271_prepare_tx_frame retvals won't be returned in order to avoid
 670  * triggering recovery by higher layers when not necessary.
 671  * In case a FW command fails within wl1271_prepare_tx_frame fails a recovery
 672  * will be queued in wl1271_cmd_send. -EAGAIN/-EBUSY from prepare_tx_frame
 673  * can occur and are legitimate so don't propagate. -EINVAL will emit a WARNING
 674  * within prepare_tx_frame code but there's nothing we should do about those
 675  * as well.
 676  */
 677 int wlcore_tx_work_locked(struct wl1271 *wl)
 678 {
 679         struct wl12xx_vif *wlvif;
 680         struct sk_buff *skb;
 681         struct wl1271_tx_hw_descr *desc;
 682         u32 buf_offset = 0, last_len = 0;
 683         bool sent_packets = false;
 684         unsigned long active_hlids[BITS_TO_LONGS(WL12XX_MAX_LINKS)] = {0};
 685         int ret = 0;
 686         int bus_ret = 0;
 687
 688         if (unlikely(wl->state == WL1271_STATE_OFF))
 689                 return 0;
 690
 691         while ((skb = wl1271_skb_dequeue(wl))) {
 692                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 693                 bool has_data = false;
 694
 695                 wlvif = NULL;
 696                 if (!wl12xx_is_dummy_packet(wl, skb) && info->control.vif)
 697                         wlvif = wl12xx_vif_to_data(info->control.vif);
 698
 699                 has_data = wlvif && wl1271_tx_is_data_present(skb);
 700                 ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset);
 701                 if (ret == -EAGAIN) {
 702                         /*
 703                          * Aggregation buffer is full.
 704                          * Flush buffer and try again.
 705                          */
 706                         wl1271_skb_queue_head(wl, wlvif, skb);
 707
 708                         buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset,
 709                                                             last_len);
 710                         bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA,
 711                                              wl->aggr_buf, buf_offset, true);
 712                         if (bus_ret < 0)
 713                                 goto out;
 714
 715                         sent_packets = true;
 716                         buf_offset = 0;
 717                         continue;
 718                 } else if (ret == -EBUSY) {
 719                         /*
 720                          * Firmware buffer is full.
 721                          * Queue back last skb, and stop aggregating.
 722                          */
 723                         wl1271_skb_queue_head(wl, wlvif, skb);
 724                         /* No work left, avoid scheduling redundant tx work */
 725                         set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
 726                         goto out_ack;
 727                 } else if (ret < 0) {
 728                         if (wl12xx_is_dummy_packet(wl, skb))
 729                                 /*
 730                                  * fw still expects dummy packet,
 731                                  * so re-enqueue it
 732                                  */
 733                                 wl1271_skb_queue_head(wl, wlvif, skb);
 734                         else
 735                                 ieee80211_free_txskb(wl->hw, skb);
 736                         goto out_ack;
 737                 }
 738                 last_len = ret;
 739                 buf_offset += last_len;
 740                 wl->tx_packets_count++;
 741                 if (has_data) {
 742                         desc = (struct wl1271_tx_hw_descr *) skb->data;
 743                         __set_bit(desc->hlid, active_hlids);
 744                 }
 745         }
 746
 747 out_ack:
 748         if (buf_offset) {
 749                 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset, last_len);
 750                 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf,
 751                                              buf_offset, true);
 752                 if (bus_ret < 0)
 753                         goto out;
 754
 755                 sent_packets = true;
 756         }
 757         if (sent_packets) {
 758                 /*
 759                  * Interrupt the firmware with the new packets. This is only
 760                  * required for older hardware revisions
 761                  */
 762                 if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION) {
 763                         bus_ret = wlcore_write32(wl, WL12XX_HOST_WR_ACCESS,
 764                                              wl->tx_packets_count);
 765                         if (bus_ret < 0)
 766                                 goto out;
 767                 }
 768
 769                 wl1271_handle_tx_low_watermark(wl);
 770         }
 771         wl12xx_rearm_rx_streaming(wl, active_hlids);
 772
 773 out:
 774         return bus_ret;
 775 }
 776
 777 void wl1271_tx_work(struct work_struct *work)
 778 {
 779         struct wl1271 *wl = container_of(work, struct wl1271, tx_work);
 780         int ret;
 781
 782         mutex_lock(&wl->mutex);
 783         ret = wl1271_ps_elp_wakeup(wl);
 784         if (ret < 0)
 785                 goto out;
 786
 787         ret = wlcore_tx_work_locked(wl);
 788         if (ret < 0) {
 789                 wl12xx_queue_recovery_work(wl);
 790                 goto out;
 791         }
 792
 793         wl1271_ps_elp_sleep(wl);
 794 out:
 795         mutex_unlock(&wl->mutex);
 796 }
 797
 798 static u8 wl1271_tx_get_rate_flags(u8 rate_class_index)
 799 {
 800         u8 flags = 0;
 801
 802         /*
 803          * TODO: use wl12xx constants when this code is moved to wl12xx, as
 804          * only it uses Tx-completion.
 805          */
 806         if (rate_class_index <= 8)
 807                 flags |= IEEE80211_TX_RC_MCS;
 808
 809         /*
 810          * TODO: use wl12xx constants when this code is moved to wl12xx, as
 811          * only it uses Tx-completion.
 812          */
 813         if (rate_class_index == 0)
 814                 flags |= IEEE80211_TX_RC_SHORT_GI;
 815
 816         return flags;
 817 }
 818
 819 static void wl1271_tx_complete_packet(struct wl1271 *wl,
 820                                       struct wl1271_tx_hw_res_descr *result)
 821 {
 822         struct ieee80211_tx_info *info;
 823         struct ieee80211_vif *vif;
 824         struct wl12xx_vif *wlvif;
 825         struct sk_buff *skb;
 826         int id = result->id;
 827         int rate = -1;
 828         u8 rate_flags = 0;
 829         u8 retries = 0;
 830
 831         /* check for id legality */
 832         if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) {
 833                 wl1271_warning("TX result illegal id: %d", id);
 834                 return;
 835         }
 836
 837         skb = wl->tx_frames[id];
 838         info = IEEE80211_SKB_CB(skb);
 839
 840         if (wl12xx_is_dummy_packet(wl, skb)) {
 841                 wl1271_free_tx_id(wl, id);
 842                 return;
 843         }
 844
 845         /* info->control is valid as long as we don't update info->status */
 846         vif = info->control.vif;
 847         wlvif = wl12xx_vif_to_data(vif);
 848
 849         /* update the TX status info */
 850         if (result->status == TX_SUCCESS) {
 851                 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 852                         info->flags |= IEEE80211_TX_STAT_ACK;
 853                 rate = wlcore_rate_to_idx(wl, result->rate_class_index,
 854                                           wlvif->band);
 855                 rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index);
 856                 retries = result->ack_failures;
 857         } else if (result->status == TX_RETRY_EXCEEDED) {
 858                 wl->stats.excessive_retries++;
 859                 retries = result->ack_failures;
 860         }
 861
 862         info->status.rates[0].idx = rate;
 863         info->status.rates[0].count = retries;
 864         info->status.rates[0].flags = rate_flags;
 865         info->status.ack_signal = -1;
 866
 867         wl->stats.retry_count += result->ack_failures;
 868
 869         /*
 870          * update sequence number only when relevant, i.e. only in
 871          * sessions of TKIP, AES and GEM (not in open or WEP sessions)
 872          */
 873         if (info->control.hw_key &&
 874             (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP ||
 875              info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP ||
 876              info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) {
 877                 u8 fw_lsb = result->tx_security_sequence_number_lsb;
 878                 u8 cur_lsb = wlvif->tx_security_last_seq_lsb;
 879
 880                 /*
 881                  * update security sequence number, taking care of potential
 882                  * wrap-around
 883                  */
 884                 wlvif->tx_security_seq += (fw_lsb - cur_lsb) & 0xff;
 885                 wlvif->tx_security_last_seq_lsb = fw_lsb;
 886         }
 887
 888         /* remove private header from packet */
 889         skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
 890
 891         /* remove TKIP header space if present */
 892         if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
 893             info->control.hw_key &&
 894             info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
 895                 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 896                 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data,
 897                         hdrlen);
 898                 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
 899         }
 900
 901         wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
 902                      " status 0x%x",
 903                      result->id, skb, result->ack_failures,
 904                      result->rate_class_index, result->status);
 905
 906         /* return the packet to the stack */
 907         skb_queue_tail(&wl->deferred_tx_queue, skb);
 908         queue_work(wl->freezable_wq, &wl->netstack_work);
 909         wl1271_free_tx_id(wl, result->id);
 910 }
 911
 912 /* Called upon reception of a TX complete interrupt */
 913 int wlcore_tx_complete(struct wl1271 *wl)
 914 {
 915         struct wl1271_acx_mem_map *memmap = wl->target_mem_map;
 916         u32 count, fw_counter;
 917         u32 i;
 918         int ret;
 919
 920         /* read the tx results from the chipset */
 921         ret = wlcore_read(wl, le32_to_cpu(memmap->tx_result),
 922                           wl->tx_res_if, sizeof(*wl->tx_res_if), false);
 923         if (ret < 0)
 924                 goto out;
 925
 926         fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter);
 927
 928         /* write host counter to chipset (to ack) */
 929         ret = wlcore_write32(wl, le32_to_cpu(memmap->tx_result) +
 930                              offsetof(struct wl1271_tx_hw_res_if,
 931                                       tx_result_host_counter), fw_counter);
 932         if (ret < 0)
 933                 goto out;
 934
 935         count = fw_counter - wl->tx_results_count;
 936         wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count);
 937
 938         /* verify that the result buffer is not getting overrun */
 939         if (unlikely(count > TX_HW_RESULT_QUEUE_LEN))
 940                 wl1271_warning("TX result overflow from chipset: %d", count);
 941
 942         /* process the results */
 943         for (i = 0; i < count; i++) {
 944                 struct wl1271_tx_hw_res_descr *result;
 945                 u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK;
 946
 947                 /* process the packet */
 948                 result =  &(wl->tx_res_if->tx_results_queue[offset]);
 949                 wl1271_tx_complete_packet(wl, result);
 950
 951                 wl->tx_results_count++;
 952         }
 953
 954 out:
 955         return ret;
 956 }
 957 EXPORT_SYMBOL(wlcore_tx_complete);
 958
 959 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
 960 {
 961         struct sk_buff *skb;
 962         int i;
 963         unsigned long flags;
 964         struct ieee80211_tx_info *info;
 965         int total[NUM_TX_QUEUES];
 966
 967         for (i = 0; i < NUM_TX_QUEUES; i++) {
 968                 total[i] = 0;
 969                 while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) {
 970                         wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb);
 971
 972                         if (!wl12xx_is_dummy_packet(wl, skb)) {
 973                                 info = IEEE80211_SKB_CB(skb);
 974                                 info->status.rates[0].idx = -1;
 975                                 info->status.rates[0].count = 0;
 976                                 ieee80211_tx_status_ni(wl->hw, skb);
 977                         }
 978
 979                         total[i]++;
 980                 }
 981         }
 982
 983         spin_lock_irqsave(&wl->wl_lock, flags);
 984         for (i = 0; i < NUM_TX_QUEUES; i++)
 985                 wl->tx_queue_count[i] -= total[i];
 986         spin_unlock_irqrestore(&wl->wl_lock, flags);
 987
 988         wl1271_handle_tx_low_watermark(wl);
 989 }
 990
 991 /* caller must hold wl->mutex and TX must be stopped */
 992 void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 993 {
 994         int i;
 995
 996         /* TX failure */
 997         for_each_set_bit(i, wlvif->links_map, WL12XX_MAX_LINKS) {
 998                 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
 999                         wl1271_free_sta(wl, wlvif, i);
1000                 else
1001                         wlvif->sta.ba_rx_bitmap = 0;
1002
1003                 wl->links[i].allocated_pkts = 0;
1004                 wl->links[i].prev_freed_pkts = 0;
1005         }
1006         wlvif->last_tx_hlid = 0;
1007
1008 }
1009 /* caller must hold wl->mutex and TX must be stopped */
1010 void wl12xx_tx_reset(struct wl1271 *wl)
1011 {
1012         int i;
1013         struct sk_buff *skb;
1014         struct ieee80211_tx_info *info;
1015
1016         /* only reset the queues if something bad happened */
1017         if (WARN_ON_ONCE(wl1271_tx_total_queue_count(wl) != 0)) {
1018                 for (i = 0; i < WL12XX_MAX_LINKS; i++)
1019                         wl1271_tx_reset_link_queues(wl, i);
1020
1021                 for (i = 0; i < NUM_TX_QUEUES; i++)
1022                         wl->tx_queue_count[i] = 0;
1023         }
1024
1025         /*
1026          * Make sure the driver is at a consistent state, in case this
1027          * function is called from a context other than interface removal.
1028          * This call will always wake the TX queues.
1029          */
1030         wl1271_handle_tx_low_watermark(wl);
1031
1032         for (i = 0; i < wl->num_tx_desc; i++) {
1033                 if (wl->tx_frames[i] == NULL)
1034                         continue;
1035
1036                 skb = wl->tx_frames[i];
1037                 wl1271_free_tx_id(wl, i);
1038                 wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb);
1039
1040                 if (!wl12xx_is_dummy_packet(wl, skb)) {
1041                         /*
1042                          * Remove private headers before passing the skb to
1043                          * mac80211
1044                          */
1045                         info = IEEE80211_SKB_CB(skb);
1046                         skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
1047                         if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
1048                             info->control.hw_key &&
1049                             info->control.hw_key->cipher ==
1050                             WLAN_CIPHER_SUITE_TKIP) {
1051                                 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1052                                 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP,
1053                                         skb->data, hdrlen);
1054                                 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
1055                         }
1056
1057                         info->status.rates[0].idx = -1;
1058                         info->status.rates[0].count = 0;
1059
1060                         ieee80211_tx_status_ni(wl->hw, skb);
1061                 }
1062         }
1063 }
1064
1065 #define WL1271_TX_FLUSH_TIMEOUT 500000
1066
1067 /* caller must *NOT* hold wl->mutex */
1068 void wl1271_tx_flush(struct wl1271 *wl)
1069 {
1070         unsigned long timeout;
1071         int i;
1072         timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
1073
1074         /* only one flush should be in progress, for consistent queue state */
1075         mutex_lock(&wl->flush_mutex);
1076
1077         wlcore_stop_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1078
1079         while (!time_after(jiffies, timeout)) {
1080                 mutex_lock(&wl->mutex);
1081                 wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d",
1082                              wl->tx_frames_cnt,
1083                              wl1271_tx_total_queue_count(wl));
1084                 if ((wl->tx_frames_cnt == 0) &&
1085                     (wl1271_tx_total_queue_count(wl) == 0)) {
1086                         mutex_unlock(&wl->mutex);
1087                         goto out;
1088                 }
1089                 mutex_unlock(&wl->mutex);
1090                 msleep(1);
1091         }
1092
1093         wl1271_warning("Unable to flush all TX buffers, timed out.");
1094
1095         /* forcibly flush all Tx buffers on our queues */
1096         mutex_lock(&wl->mutex);
1097         for (i = 0; i < WL12XX_MAX_LINKS; i++)
1098                 wl1271_tx_reset_link_queues(wl, i);
1099         mutex_unlock(&wl->mutex);
1100
1101 out:
1102         wlcore_wake_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1103         mutex_unlock(&wl->flush_mutex);
1104 }
1105 EXPORT_SYMBOL_GPL(wl1271_tx_flush);
1106
1107 u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set)
1108 {
1109         if (WARN_ON(!rate_set))
1110                 return 0;
1111
1112         return BIT(__ffs(rate_set));
1113 }
1114
1115 void wlcore_stop_queue_locked(struct wl1271 *wl, u8 queue,
1116                               enum wlcore_queue_stop_reason reason)
1117 {
1118         bool stopped = !!wl->queue_stop_reasons[queue];
1119
1120         /* queue should not be stopped for this reason */
1121         WARN_ON(test_and_set_bit(reason, &wl->queue_stop_reasons[queue]));
1122
1123         if (stopped)
1124                 return;
1125
1126         ieee80211_stop_queue(wl->hw, wl1271_tx_get_mac80211_queue(queue));
1127 }
1128
1129 void wlcore_stop_queue(struct wl1271 *wl, u8 queue,
1130                        enum wlcore_queue_stop_reason reason)
1131 {
1132         unsigned long flags;
1133
1134         spin_lock_irqsave(&wl->wl_lock, flags);
1135         wlcore_stop_queue_locked(wl, queue, reason);
1136         spin_unlock_irqrestore(&wl->wl_lock, flags);
1137 }
1138
1139 void wlcore_wake_queue(struct wl1271 *wl, u8 queue,
1140                        enum wlcore_queue_stop_reason reason)
1141 {
1142         unsigned long flags;
1143
1144         spin_lock_irqsave(&wl->wl_lock, flags);
1145
1146         /* queue should not be clear for this reason */
1147         WARN_ON(!test_and_clear_bit(reason, &wl->queue_stop_reasons[queue]));
1148
1149         if (wl->queue_stop_reasons[queue])
1150                 goto out;
1151
1152         ieee80211_wake_queue(wl->hw, wl1271_tx_get_mac80211_queue(queue));
1153
1154 out:
1155         spin_unlock_irqrestore(&wl->wl_lock, flags);
1156 }
1157
1158 void wlcore_stop_queues(struct wl1271 *wl,
1159                         enum wlcore_queue_stop_reason reason)
1160 {
1161         int i;
1162
1163         for (i = 0; i < NUM_TX_QUEUES; i++)
1164                 wlcore_stop_queue(wl, i, reason);
1165 }
1166 EXPORT_SYMBOL_GPL(wlcore_stop_queues);
1167
1168 void wlcore_wake_queues(struct wl1271 *wl,
1169                         enum wlcore_queue_stop_reason reason)
1170 {
1171         int i;
1172
1173         for (i = 0; i < NUM_TX_QUEUES; i++)
1174                 wlcore_wake_queue(wl, i, reason);
1175 }
1176 EXPORT_SYMBOL_GPL(wlcore_wake_queues);
1177
1178 void wlcore_reset_stopped_queues(struct wl1271 *wl)
1179 {
1180         int i;
1181         unsigned long flags;
1182
1183         spin_lock_irqsave(&wl->wl_lock, flags);
1184
1185         for (i = 0; i < NUM_TX_QUEUES; i++) {
1186                 if (!wl->queue_stop_reasons[i])
1187                         continue;
1188
1189                 wl->queue_stop_reasons[i] = 0;
1190                 ieee80211_wake_queue(wl->hw,
1191                                      wl1271_tx_get_mac80211_queue(i));
1192         }
1193
1194         spin_unlock_irqrestore(&wl->wl_lock, flags);
1195 }
1196
1197 bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl, u8 queue,
1198                              enum wlcore_queue_stop_reason reason)
1199 {
1200         return test_bit(reason, &wl->queue_stop_reasons[queue]);
1201 }
1202
1203 bool wlcore_is_queue_stopped(struct wl1271 *wl, u8 queue)
1204 {
1205         return !!wl->queue_stop_reasons[queue];
1206 }