tx.c revision 1c33db782d1d0d9be83feacbb065cd4956f485e7
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 42static 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 61static 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 75void 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} 85EXPORT_SYMBOL(wl1271_free_tx_id); 86 87static 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 103static void wl1271_tx_regulate_link(struct wl1271 *wl, 104 struct wl12xx_vif *wlvif, 105 u8 hlid) 106{ 107 bool fw_ps, single_link; 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_link = (wl->active_link_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 link. In this 121 * case FW-memory congestion is less of a problem. 122 */ 123 if (!single_link && fw_ps && tx_pkts >= WL1271_PS_STA_MAX_PACKETS) 124 wl12xx_ps_link_start(wl, wlvif, hlid, true); 125} 126 127bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb) 128{ 129 return wl->dummy_packet == skb; 130} 131EXPORT_SYMBOL(wl12xx_is_dummy_packet); 132 133static u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif, 134 struct sk_buff *skb, struct ieee80211_sta *sta) 135{ 136 if (sta) { 137 struct wl1271_station *wl_sta; 138 139 wl_sta = (struct wl1271_station *)sta->drv_priv; 140 return wl_sta->hlid; 141 } else { 142 struct ieee80211_hdr *hdr; 143 144 if (!test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags)) 145 return wl->system_hlid; 146 147 hdr = (struct ieee80211_hdr *)skb->data; 148 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 149 return wlvif->ap.bcast_hlid; 150 else 151 return wlvif->ap.global_hlid; 152 } 153} 154 155u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif, 156 struct sk_buff *skb, struct ieee80211_sta *sta) 157{ 158 struct ieee80211_tx_info *control; 159 160 if (wlvif->bss_type == BSS_TYPE_AP_BSS) 161 return wl12xx_tx_get_hlid_ap(wl, wlvif, skb, sta); 162 163 control = IEEE80211_SKB_CB(skb); 164 if (control->flags & IEEE80211_TX_CTL_TX_OFFCHAN) { 165 wl1271_debug(DEBUG_TX, "tx offchannel"); 166 return wlvif->dev_hlid; 167 } 168 169 return wlvif->sta.hlid; 170} 171 172unsigned int wlcore_calc_packet_alignment(struct wl1271 *wl, 173 unsigned int packet_length) 174{ 175 if ((wl->quirks & WLCORE_QUIRK_TX_PAD_LAST_FRAME) || 176 !(wl->quirks & WLCORE_QUIRK_TX_BLOCKSIZE_ALIGN)) 177 return ALIGN(packet_length, WL1271_TX_ALIGN_TO); 178 else 179 return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE); 180} 181EXPORT_SYMBOL(wlcore_calc_packet_alignment); 182 183static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif, 184 struct sk_buff *skb, u32 extra, u32 buf_offset, 185 u8 hlid, bool is_gem) 186{ 187 struct wl1271_tx_hw_descr *desc; 188 u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra; 189 u32 total_blocks; 190 int id, ret = -EBUSY, ac; 191 u32 spare_blocks; 192 193 if (buf_offset + total_len > wl->aggr_buf_size) 194 return -EAGAIN; 195 196 spare_blocks = wlcore_hw_get_spare_blocks(wl, is_gem); 197 198 /* allocate free identifier for the packet */ 199 id = wl1271_alloc_tx_id(wl, skb); 200 if (id < 0) 201 return id; 202 203 total_blocks = wlcore_hw_calc_tx_blocks(wl, total_len, spare_blocks); 204 205 if (total_blocks <= wl->tx_blocks_available) { 206 desc = (struct wl1271_tx_hw_descr *)skb_push( 207 skb, total_len - skb->len); 208 209 wlcore_hw_set_tx_desc_blocks(wl, desc, total_blocks, 210 spare_blocks); 211 212 desc->id = id; 213 214 wl->tx_blocks_available -= total_blocks; 215 wl->tx_allocated_blocks += total_blocks; 216 217 /* If the FW was empty before, arm the Tx watchdog */ 218 if (wl->tx_allocated_blocks == total_blocks) 219 wl12xx_rearm_tx_watchdog_locked(wl); 220 221 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); 222 wl->tx_allocated_pkts[ac]++; 223 224 if (test_bit(hlid, wl->links_map)) 225 wl->links[hlid].allocated_pkts++; 226 227 ret = 0; 228 229 wl1271_debug(DEBUG_TX, 230 "tx_allocate: size: %d, blocks: %d, id: %d", 231 total_len, total_blocks, id); 232 } else { 233 wl1271_free_tx_id(wl, id); 234 } 235 236 return ret; 237} 238 239static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif, 240 struct sk_buff *skb, u32 extra, 241 struct ieee80211_tx_info *control, u8 hlid) 242{ 243 struct timespec ts; 244 struct wl1271_tx_hw_descr *desc; 245 int ac, rate_idx; 246 s64 hosttime; 247 u16 tx_attr = 0; 248 __le16 frame_control; 249 struct ieee80211_hdr *hdr; 250 u8 *frame_start; 251 bool is_dummy; 252 253 desc = (struct wl1271_tx_hw_descr *) skb->data; 254 frame_start = (u8 *)(desc + 1); 255 hdr = (struct ieee80211_hdr *)(frame_start + extra); 256 frame_control = hdr->frame_control; 257 258 /* relocate space for security header */ 259 if (extra) { 260 int hdrlen = ieee80211_hdrlen(frame_control); 261 memmove(frame_start, hdr, hdrlen); 262 skb_set_network_header(skb, skb_network_offset(skb) + extra); 263 } 264 265 /* configure packet life time */ 266 getnstimeofday(&ts); 267 hosttime = (timespec_to_ns(&ts) >> 10); 268 desc->start_time = cpu_to_le32(hosttime - wl->time_offset); 269 270 is_dummy = wl12xx_is_dummy_packet(wl, skb); 271 if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS) 272 desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU); 273 else 274 desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU); 275 276 /* queue */ 277 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); 278 desc->tid = skb->priority; 279 280 if (is_dummy) { 281 /* 282 * FW expects the dummy packet to have an invalid session id - 283 * any session id that is different than the one set in the join 284 */ 285 tx_attr = (SESSION_COUNTER_INVALID << 286 TX_HW_ATTR_OFST_SESSION_COUNTER) & 287 TX_HW_ATTR_SESSION_COUNTER; 288 289 tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ; 290 } else if (wlvif) { 291 u8 session_id = wl->session_ids[hlid]; 292 293 if ((wl->quirks & WLCORE_QUIRK_AP_ZERO_SESSION_ID) && 294 (wlvif->bss_type == BSS_TYPE_AP_BSS)) 295 session_id = 0; 296 297 /* configure the tx attributes */ 298 tx_attr = session_id << TX_HW_ATTR_OFST_SESSION_COUNTER; 299 } 300 301 desc->hlid = hlid; 302 if (is_dummy || !wlvif) 303 rate_idx = 0; 304 else if (wlvif->bss_type != BSS_TYPE_AP_BSS) { 305 /* 306 * if the packets are data packets 307 * send them with AP rate policies (EAPOLs are an exception), 308 * otherwise use default basic rates 309 */ 310 if (skb->protocol == cpu_to_be16(ETH_P_PAE)) 311 rate_idx = wlvif->sta.basic_rate_idx; 312 else if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE) 313 rate_idx = wlvif->sta.p2p_rate_idx; 314 else if (ieee80211_is_data(frame_control)) 315 rate_idx = wlvif->sta.ap_rate_idx; 316 else 317 rate_idx = wlvif->sta.basic_rate_idx; 318 } else { 319 if (hlid == wlvif->ap.global_hlid) 320 rate_idx = wlvif->ap.mgmt_rate_idx; 321 else if (hlid == wlvif->ap.bcast_hlid || 322 skb->protocol == cpu_to_be16(ETH_P_PAE) || 323 !ieee80211_is_data(frame_control)) 324 /* 325 * send non-data, bcast and EAPOLs using the 326 * min basic rate 327 */ 328 rate_idx = wlvif->ap.bcast_rate_idx; 329 else 330 rate_idx = wlvif->ap.ucast_rate_idx[ac]; 331 } 332 333 tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY; 334 335 /* for WEP shared auth - no fw encryption is needed */ 336 if (ieee80211_is_auth(frame_control) && 337 ieee80211_has_protected(frame_control)) 338 tx_attr |= TX_HW_ATTR_HOST_ENCRYPT; 339 340 desc->tx_attr = cpu_to_le16(tx_attr); 341 342 wlcore_hw_set_tx_desc_csum(wl, desc, skb); 343 wlcore_hw_set_tx_desc_data_len(wl, desc, skb); 344} 345 346/* caller must hold wl->mutex */ 347static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif, 348 struct sk_buff *skb, u32 buf_offset, u8 hlid) 349{ 350 struct ieee80211_tx_info *info; 351 u32 extra = 0; 352 int ret = 0; 353 u32 total_len; 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 if (hlid == WL12XX_INVALID_LINK_ID) { 363 wl1271_error("invalid hlid. dropping skb 0x%p", skb); 364 return -EINVAL; 365 } 366 367 info = IEEE80211_SKB_CB(skb); 368 369 is_dummy = wl12xx_is_dummy_packet(wl, skb); 370 371 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) && 372 info->control.hw_key && 373 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) 374 extra = WL1271_EXTRA_SPACE_TKIP; 375 376 if (info->control.hw_key) { 377 bool is_wep; 378 u8 idx = info->control.hw_key->hw_key_idx; 379 u32 cipher = info->control.hw_key->cipher; 380 381 is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) || 382 (cipher == WLAN_CIPHER_SUITE_WEP104); 383 384 if (unlikely(is_wep && wlvif->default_key != idx)) { 385 ret = wl1271_set_default_wep_key(wl, wlvif, idx); 386 if (ret < 0) 387 return ret; 388 wlvif->default_key = idx; 389 } 390 391 is_gem = (cipher == WL1271_CIPHER_SUITE_GEM); 392 } 393 394 ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid, 395 is_gem); 396 if (ret < 0) 397 return ret; 398 399 wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid); 400 401 if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) { 402 wl1271_tx_ap_update_inconnection_sta(wl, skb); 403 wl1271_tx_regulate_link(wl, wlvif, hlid); 404 } 405 406 /* 407 * The length of each packet is stored in terms of 408 * words. Thus, we must pad the skb data to make sure its 409 * length is aligned. The number of padding bytes is computed 410 * and set in wl1271_tx_fill_hdr. 411 * In special cases, we want to align to a specific block size 412 * (eg. for wl128x with SDIO we align to 256). 413 */ 414 total_len = wlcore_calc_packet_alignment(wl, skb->len); 415 416 memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len); 417 memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len); 418 419 /* Revert side effects in the dummy packet skb, so it can be reused */ 420 if (is_dummy) 421 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); 422 423 return total_len; 424} 425 426u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set, 427 enum ieee80211_band rate_band) 428{ 429 struct ieee80211_supported_band *band; 430 u32 enabled_rates = 0; 431 int bit; 432 433 band = wl->hw->wiphy->bands[rate_band]; 434 for (bit = 0; bit < band->n_bitrates; bit++) { 435 if (rate_set & 0x1) 436 enabled_rates |= band->bitrates[bit].hw_value; 437 rate_set >>= 1; 438 } 439 440 /* MCS rates indication are on bits 16 - 31 */ 441 rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates; 442 443 for (bit = 0; bit < 16; bit++) { 444 if (rate_set & 0x1) 445 enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit); 446 rate_set >>= 1; 447 } 448 449 return enabled_rates; 450} 451 452void wl1271_handle_tx_low_watermark(struct wl1271 *wl) 453{ 454 int i; 455 struct wl12xx_vif *wlvif; 456 457 wl12xx_for_each_wlvif(wl, wlvif) { 458 for (i = 0; i < NUM_TX_QUEUES; i++) { 459 if (wlcore_is_queue_stopped_by_reason(wl, wlvif, i, 460 WLCORE_QUEUE_STOP_REASON_WATERMARK) && 461 wlvif->tx_queue_count[i] <= 462 WL1271_TX_QUEUE_LOW_WATERMARK) 463 /* firmware buffer has space, restart queues */ 464 wlcore_wake_queue(wl, wlvif, i, 465 WLCORE_QUEUE_STOP_REASON_WATERMARK); 466 } 467 } 468} 469 470static int wlcore_select_ac(struct wl1271 *wl) 471{ 472 int i, q = -1, ac; 473 u32 min_pkts = 0xffffffff; 474 475 /* 476 * Find a non-empty ac where: 477 * 1. There are packets to transmit 478 * 2. The FW has the least allocated blocks 479 * 480 * We prioritize the ACs according to VO>VI>BE>BK 481 */ 482 for (i = 0; i < NUM_TX_QUEUES; i++) { 483 ac = wl1271_tx_get_queue(i); 484 if (wl->tx_queue_count[ac] && 485 wl->tx_allocated_pkts[ac] < min_pkts) { 486 q = ac; 487 min_pkts = wl->tx_allocated_pkts[q]; 488 } 489 } 490 491 return q; 492} 493 494static struct sk_buff *wlcore_lnk_dequeue(struct wl1271 *wl, 495 struct wl1271_link *lnk, u8 q) 496{ 497 struct sk_buff *skb; 498 unsigned long flags; 499 500 skb = skb_dequeue(&lnk->tx_queue[q]); 501 if (skb) { 502 spin_lock_irqsave(&wl->wl_lock, flags); 503 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0); 504 wl->tx_queue_count[q]--; 505 if (lnk->wlvif) { 506 WARN_ON_ONCE(lnk->wlvif->tx_queue_count[q] <= 0); 507 lnk->wlvif->tx_queue_count[q]--; 508 } 509 spin_unlock_irqrestore(&wl->wl_lock, flags); 510 } 511 512 return skb; 513} 514 515static struct sk_buff *wlcore_lnk_dequeue_high_prio(struct wl1271 *wl, 516 u8 hlid, u8 ac, 517 u8 *low_prio_hlid) 518{ 519 struct wl1271_link *lnk = &wl->links[hlid]; 520 521 if (!wlcore_hw_lnk_high_prio(wl, hlid, lnk)) { 522 if (*low_prio_hlid == WL12XX_INVALID_LINK_ID && 523 !skb_queue_empty(&lnk->tx_queue[ac]) && 524 wlcore_hw_lnk_low_prio(wl, hlid, lnk)) 525 /* we found the first non-empty low priority queue */ 526 *low_prio_hlid = hlid; 527 528 return NULL; 529 } 530 531 return wlcore_lnk_dequeue(wl, lnk, ac); 532} 533 534static struct sk_buff *wlcore_vif_dequeue_high_prio(struct wl1271 *wl, 535 struct wl12xx_vif *wlvif, 536 u8 ac, u8 *hlid, 537 u8 *low_prio_hlid) 538{ 539 struct sk_buff *skb = NULL; 540 int i, h, start_hlid; 541 542 /* start from the link after the last one */ 543 start_hlid = (wlvif->last_tx_hlid + 1) % WL12XX_MAX_LINKS; 544 545 /* dequeue according to AC, round robin on each link */ 546 for (i = 0; i < WL12XX_MAX_LINKS; i++) { 547 h = (start_hlid + i) % WL12XX_MAX_LINKS; 548 549 /* only consider connected stations */ 550 if (!test_bit(h, wlvif->links_map)) 551 continue; 552 553 skb = wlcore_lnk_dequeue_high_prio(wl, h, ac, 554 low_prio_hlid); 555 if (!skb) 556 continue; 557 558 wlvif->last_tx_hlid = h; 559 break; 560 } 561 562 if (!skb) 563 wlvif->last_tx_hlid = 0; 564 565 *hlid = wlvif->last_tx_hlid; 566 return skb; 567} 568 569static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl, u8 *hlid) 570{ 571 unsigned long flags; 572 struct wl12xx_vif *wlvif = wl->last_wlvif; 573 struct sk_buff *skb = NULL; 574 int ac; 575 u8 low_prio_hlid = WL12XX_INVALID_LINK_ID; 576 577 ac = wlcore_select_ac(wl); 578 if (ac < 0) 579 goto out; 580 581 /* continue from last wlvif (round robin) */ 582 if (wlvif) { 583 wl12xx_for_each_wlvif_continue(wl, wlvif) { 584 if (!wlvif->tx_queue_count[ac]) 585 continue; 586 587 skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid, 588 &low_prio_hlid); 589 if (!skb) 590 continue; 591 592 wl->last_wlvif = wlvif; 593 break; 594 } 595 } 596 597 /* dequeue from the system HLID before the restarting wlvif list */ 598 if (!skb) { 599 skb = wlcore_lnk_dequeue_high_prio(wl, wl->system_hlid, 600 ac, &low_prio_hlid); 601 if (skb) { 602 *hlid = wl->system_hlid; 603 wl->last_wlvif = NULL; 604 } 605 } 606 607 /* Do a new pass over the wlvif list. But no need to continue 608 * after last_wlvif. The previous pass should have found it. */ 609 if (!skb) { 610 wl12xx_for_each_wlvif(wl, wlvif) { 611 if (!wlvif->tx_queue_count[ac]) 612 goto next; 613 614 skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid, 615 &low_prio_hlid); 616 if (skb) { 617 wl->last_wlvif = wlvif; 618 break; 619 } 620 621next: 622 if (wlvif == wl->last_wlvif) 623 break; 624 } 625 } 626 627 /* no high priority skbs found - but maybe a low priority one? */ 628 if (!skb && low_prio_hlid != WL12XX_INVALID_LINK_ID) { 629 struct wl1271_link *lnk = &wl->links[low_prio_hlid]; 630 skb = wlcore_lnk_dequeue(wl, lnk, ac); 631 632 WARN_ON(!skb); /* we checked this before */ 633 *hlid = low_prio_hlid; 634 635 /* ensure proper round robin in the vif/link levels */ 636 wl->last_wlvif = lnk->wlvif; 637 if (lnk->wlvif) 638 lnk->wlvif->last_tx_hlid = low_prio_hlid; 639 640 } 641 642 if (!skb && 643 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) { 644 int q; 645 646 skb = wl->dummy_packet; 647 *hlid = wl->system_hlid; 648 q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); 649 spin_lock_irqsave(&wl->wl_lock, flags); 650 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0); 651 wl->tx_queue_count[q]--; 652 spin_unlock_irqrestore(&wl->wl_lock, flags); 653 } 654 655out: 656 return skb; 657} 658 659static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif, 660 struct sk_buff *skb, u8 hlid) 661{ 662 unsigned long flags; 663 int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); 664 665 if (wl12xx_is_dummy_packet(wl, skb)) { 666 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags); 667 } else { 668 skb_queue_head(&wl->links[hlid].tx_queue[q], skb); 669 670 /* make sure we dequeue the same packet next time */ 671 wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) % 672 WL12XX_MAX_LINKS; 673 } 674 675 spin_lock_irqsave(&wl->wl_lock, flags); 676 wl->tx_queue_count[q]++; 677 if (wlvif) 678 wlvif->tx_queue_count[q]++; 679 spin_unlock_irqrestore(&wl->wl_lock, flags); 680} 681 682static bool wl1271_tx_is_data_present(struct sk_buff *skb) 683{ 684 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); 685 686 return ieee80211_is_data_present(hdr->frame_control); 687} 688 689void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids) 690{ 691 struct wl12xx_vif *wlvif; 692 u32 timeout; 693 u8 hlid; 694 695 if (!wl->conf.rx_streaming.interval) 696 return; 697 698 if (!wl->conf.rx_streaming.always && 699 !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags)) 700 return; 701 702 timeout = wl->conf.rx_streaming.duration; 703 wl12xx_for_each_wlvif_sta(wl, wlvif) { 704 bool found = false; 705 for_each_set_bit(hlid, active_hlids, WL12XX_MAX_LINKS) { 706 if (test_bit(hlid, wlvif->links_map)) { 707 found = true; 708 break; 709 } 710 } 711 712 if (!found) 713 continue; 714 715 /* enable rx streaming */ 716 if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags)) 717 ieee80211_queue_work(wl->hw, 718 &wlvif->rx_streaming_enable_work); 719 720 mod_timer(&wlvif->rx_streaming_timer, 721 jiffies + msecs_to_jiffies(timeout)); 722 } 723} 724 725/* 726 * Returns failure values only in case of failed bus ops within this function. 727 * wl1271_prepare_tx_frame retvals won't be returned in order to avoid 728 * triggering recovery by higher layers when not necessary. 729 * In case a FW command fails within wl1271_prepare_tx_frame fails a recovery 730 * will be queued in wl1271_cmd_send. -EAGAIN/-EBUSY from prepare_tx_frame 731 * can occur and are legitimate so don't propagate. -EINVAL will emit a WARNING 732 * within prepare_tx_frame code but there's nothing we should do about those 733 * as well. 734 */ 735int wlcore_tx_work_locked(struct wl1271 *wl) 736{ 737 struct wl12xx_vif *wlvif; 738 struct sk_buff *skb; 739 struct wl1271_tx_hw_descr *desc; 740 u32 buf_offset = 0, last_len = 0; 741 bool sent_packets = false; 742 unsigned long active_hlids[BITS_TO_LONGS(WL12XX_MAX_LINKS)] = {0}; 743 int ret = 0; 744 int bus_ret = 0; 745 u8 hlid; 746 747 if (unlikely(wl->state != WLCORE_STATE_ON)) 748 return 0; 749 750 while ((skb = wl1271_skb_dequeue(wl, &hlid))) { 751 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 752 bool has_data = false; 753 754 wlvif = NULL; 755 if (!wl12xx_is_dummy_packet(wl, skb)) 756 wlvif = wl12xx_vif_to_data(info->control.vif); 757 else 758 hlid = wl->system_hlid; 759 760 has_data = wlvif && wl1271_tx_is_data_present(skb); 761 ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset, 762 hlid); 763 if (ret == -EAGAIN) { 764 /* 765 * Aggregation buffer is full. 766 * Flush buffer and try again. 767 */ 768 wl1271_skb_queue_head(wl, wlvif, skb, hlid); 769 770 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset, 771 last_len); 772 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA, 773 wl->aggr_buf, buf_offset, true); 774 if (bus_ret < 0) 775 goto out; 776 777 sent_packets = true; 778 buf_offset = 0; 779 continue; 780 } else if (ret == -EBUSY) { 781 /* 782 * Firmware buffer is full. 783 * Queue back last skb, and stop aggregating. 784 */ 785 wl1271_skb_queue_head(wl, wlvif, skb, hlid); 786 /* No work left, avoid scheduling redundant tx work */ 787 set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); 788 goto out_ack; 789 } else if (ret < 0) { 790 if (wl12xx_is_dummy_packet(wl, skb)) 791 /* 792 * fw still expects dummy packet, 793 * so re-enqueue it 794 */ 795 wl1271_skb_queue_head(wl, wlvif, skb, hlid); 796 else 797 ieee80211_free_txskb(wl->hw, skb); 798 goto out_ack; 799 } 800 last_len = ret; 801 buf_offset += last_len; 802 wl->tx_packets_count++; 803 if (has_data) { 804 desc = (struct wl1271_tx_hw_descr *) skb->data; 805 __set_bit(desc->hlid, active_hlids); 806 } 807 } 808 809out_ack: 810 if (buf_offset) { 811 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset, last_len); 812 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf, 813 buf_offset, true); 814 if (bus_ret < 0) 815 goto out; 816 817 sent_packets = true; 818 } 819 if (sent_packets) { 820 /* 821 * Interrupt the firmware with the new packets. This is only 822 * required for older hardware revisions 823 */ 824 if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION) { 825 bus_ret = wlcore_write32(wl, WL12XX_HOST_WR_ACCESS, 826 wl->tx_packets_count); 827 if (bus_ret < 0) 828 goto out; 829 } 830 831 wl1271_handle_tx_low_watermark(wl); 832 } 833 wl12xx_rearm_rx_streaming(wl, active_hlids); 834 835out: 836 return bus_ret; 837} 838 839void wl1271_tx_work(struct work_struct *work) 840{ 841 struct wl1271 *wl = container_of(work, struct wl1271, tx_work); 842 int ret; 843 844 mutex_lock(&wl->mutex); 845 ret = wl1271_ps_elp_wakeup(wl); 846 if (ret < 0) 847 goto out; 848 849 ret = wlcore_tx_work_locked(wl); 850 if (ret < 0) { 851 wl12xx_queue_recovery_work(wl); 852 goto out; 853 } 854 855 wl1271_ps_elp_sleep(wl); 856out: 857 mutex_unlock(&wl->mutex); 858} 859 860static u8 wl1271_tx_get_rate_flags(u8 rate_class_index) 861{ 862 u8 flags = 0; 863 864 /* 865 * TODO: use wl12xx constants when this code is moved to wl12xx, as 866 * only it uses Tx-completion. 867 */ 868 if (rate_class_index <= 8) 869 flags |= IEEE80211_TX_RC_MCS; 870 871 /* 872 * TODO: use wl12xx constants when this code is moved to wl12xx, as 873 * only it uses Tx-completion. 874 */ 875 if (rate_class_index == 0) 876 flags |= IEEE80211_TX_RC_SHORT_GI; 877 878 return flags; 879} 880 881static void wl1271_tx_complete_packet(struct wl1271 *wl, 882 struct wl1271_tx_hw_res_descr *result) 883{ 884 struct ieee80211_tx_info *info; 885 struct ieee80211_vif *vif; 886 struct wl12xx_vif *wlvif; 887 struct sk_buff *skb; 888 int id = result->id; 889 int rate = -1; 890 u8 rate_flags = 0; 891 u8 retries = 0; 892 893 /* check for id legality */ 894 if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) { 895 wl1271_warning("TX result illegal id: %d", id); 896 return; 897 } 898 899 skb = wl->tx_frames[id]; 900 info = IEEE80211_SKB_CB(skb); 901 902 if (wl12xx_is_dummy_packet(wl, skb)) { 903 wl1271_free_tx_id(wl, id); 904 return; 905 } 906 907 /* info->control is valid as long as we don't update info->status */ 908 vif = info->control.vif; 909 wlvif = wl12xx_vif_to_data(vif); 910 911 /* update the TX status info */ 912 if (result->status == TX_SUCCESS) { 913 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 914 info->flags |= IEEE80211_TX_STAT_ACK; 915 rate = wlcore_rate_to_idx(wl, result->rate_class_index, 916 wlvif->band); 917 rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index); 918 retries = result->ack_failures; 919 } else if (result->status == TX_RETRY_EXCEEDED) { 920 wl->stats.excessive_retries++; 921 retries = result->ack_failures; 922 } 923 924 info->status.rates[0].idx = rate; 925 info->status.rates[0].count = retries; 926 info->status.rates[0].flags = rate_flags; 927 info->status.ack_signal = -1; 928 929 wl->stats.retry_count += result->ack_failures; 930 931 /* 932 * update sequence number only when relevant, i.e. only in 933 * sessions of TKIP, AES and GEM (not in open or WEP sessions) 934 */ 935 if (info->control.hw_key && 936 (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP || 937 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP || 938 info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) { 939 u8 fw_lsb = result->tx_security_sequence_number_lsb; 940 u8 cur_lsb = wlvif->tx_security_last_seq_lsb; 941 942 /* 943 * update security sequence number, taking care of potential 944 * wrap-around 945 */ 946 wlvif->tx_security_seq += (fw_lsb - cur_lsb) & 0xff; 947 wlvif->tx_security_last_seq_lsb = fw_lsb; 948 } 949 950 /* remove private header from packet */ 951 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); 952 953 /* remove TKIP header space if present */ 954 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) && 955 info->control.hw_key && 956 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { 957 int hdrlen = ieee80211_get_hdrlen_from_skb(skb); 958 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data, 959 hdrlen); 960 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP); 961 } 962 963 wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x" 964 " status 0x%x", 965 result->id, skb, result->ack_failures, 966 result->rate_class_index, result->status); 967 968 /* return the packet to the stack */ 969 skb_queue_tail(&wl->deferred_tx_queue, skb); 970 queue_work(wl->freezable_wq, &wl->netstack_work); 971 wl1271_free_tx_id(wl, result->id); 972} 973 974/* Called upon reception of a TX complete interrupt */ 975int wlcore_tx_complete(struct wl1271 *wl) 976{ 977 struct wl1271_acx_mem_map *memmap = wl->target_mem_map; 978 u32 count, fw_counter; 979 u32 i; 980 int ret; 981 982 /* read the tx results from the chipset */ 983 ret = wlcore_read(wl, le32_to_cpu(memmap->tx_result), 984 wl->tx_res_if, sizeof(*wl->tx_res_if), false); 985 if (ret < 0) 986 goto out; 987 988 fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter); 989 990 /* write host counter to chipset (to ack) */ 991 ret = wlcore_write32(wl, le32_to_cpu(memmap->tx_result) + 992 offsetof(struct wl1271_tx_hw_res_if, 993 tx_result_host_counter), fw_counter); 994 if (ret < 0) 995 goto out; 996 997 count = fw_counter - wl->tx_results_count; 998 wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count); 999 1000 /* verify that the result buffer is not getting overrun */ 1001 if (unlikely(count > TX_HW_RESULT_QUEUE_LEN)) 1002 wl1271_warning("TX result overflow from chipset: %d", count); 1003 1004 /* process the results */ 1005 for (i = 0; i < count; i++) { 1006 struct wl1271_tx_hw_res_descr *result; 1007 u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK; 1008 1009 /* process the packet */ 1010 result = &(wl->tx_res_if->tx_results_queue[offset]); 1011 wl1271_tx_complete_packet(wl, result); 1012 1013 wl->tx_results_count++; 1014 } 1015 1016out: 1017 return ret; 1018} 1019EXPORT_SYMBOL(wlcore_tx_complete); 1020 1021void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid) 1022{ 1023 struct sk_buff *skb; 1024 int i; 1025 unsigned long flags; 1026 struct ieee80211_tx_info *info; 1027 int total[NUM_TX_QUEUES]; 1028 struct wl1271_link *lnk = &wl->links[hlid]; 1029 1030 for (i = 0; i < NUM_TX_QUEUES; i++) { 1031 total[i] = 0; 1032 while ((skb = skb_dequeue(&lnk->tx_queue[i]))) { 1033 wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb); 1034 1035 if (!wl12xx_is_dummy_packet(wl, skb)) { 1036 info = IEEE80211_SKB_CB(skb); 1037 info->status.rates[0].idx = -1; 1038 info->status.rates[0].count = 0; 1039 ieee80211_tx_status_ni(wl->hw, skb); 1040 } 1041 1042 total[i]++; 1043 } 1044 } 1045 1046 spin_lock_irqsave(&wl->wl_lock, flags); 1047 for (i = 0; i < NUM_TX_QUEUES; i++) { 1048 wl->tx_queue_count[i] -= total[i]; 1049 if (lnk->wlvif) 1050 lnk->wlvif->tx_queue_count[i] -= total[i]; 1051 } 1052 spin_unlock_irqrestore(&wl->wl_lock, flags); 1053 1054 wl1271_handle_tx_low_watermark(wl); 1055} 1056 1057/* caller must hold wl->mutex and TX must be stopped */ 1058void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif) 1059{ 1060 int i; 1061 1062 /* TX failure */ 1063 for_each_set_bit(i, wlvif->links_map, WL12XX_MAX_LINKS) { 1064 if (wlvif->bss_type == BSS_TYPE_AP_BSS) { 1065 /* this calls wl12xx_free_link */ 1066 wl1271_free_sta(wl, wlvif, i); 1067 } else { 1068 u8 hlid = i; 1069 wlvif->sta.ba_rx_bitmap = 0; 1070 wl12xx_free_link(wl, wlvif, &hlid); 1071 } 1072 } 1073 wlvif->last_tx_hlid = 0; 1074 1075 for (i = 0; i < NUM_TX_QUEUES; i++) 1076 wlvif->tx_queue_count[i] = 0; 1077} 1078/* caller must hold wl->mutex and TX must be stopped */ 1079void wl12xx_tx_reset(struct wl1271 *wl) 1080{ 1081 int i; 1082 struct sk_buff *skb; 1083 struct ieee80211_tx_info *info; 1084 1085 /* only reset the queues if something bad happened */ 1086 if (wl1271_tx_total_queue_count(wl) != 0) { 1087 for (i = 0; i < WL12XX_MAX_LINKS; i++) 1088 wl1271_tx_reset_link_queues(wl, i); 1089 1090 for (i = 0; i < NUM_TX_QUEUES; i++) 1091 wl->tx_queue_count[i] = 0; 1092 } 1093 1094 /* 1095 * Make sure the driver is at a consistent state, in case this 1096 * function is called from a context other than interface removal. 1097 * This call will always wake the TX queues. 1098 */ 1099 wl1271_handle_tx_low_watermark(wl); 1100 1101 for (i = 0; i < wl->num_tx_desc; i++) { 1102 if (wl->tx_frames[i] == NULL) 1103 continue; 1104 1105 skb = wl->tx_frames[i]; 1106 wl1271_free_tx_id(wl, i); 1107 wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb); 1108 1109 if (!wl12xx_is_dummy_packet(wl, skb)) { 1110 /* 1111 * Remove private headers before passing the skb to 1112 * mac80211 1113 */ 1114 info = IEEE80211_SKB_CB(skb); 1115 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); 1116 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) && 1117 info->control.hw_key && 1118 info->control.hw_key->cipher == 1119 WLAN_CIPHER_SUITE_TKIP) { 1120 int hdrlen = ieee80211_get_hdrlen_from_skb(skb); 1121 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, 1122 skb->data, hdrlen); 1123 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP); 1124 } 1125 1126 info->status.rates[0].idx = -1; 1127 info->status.rates[0].count = 0; 1128 1129 ieee80211_tx_status_ni(wl->hw, skb); 1130 } 1131 } 1132} 1133 1134#define WL1271_TX_FLUSH_TIMEOUT 500000 1135 1136/* caller must *NOT* hold wl->mutex */ 1137void wl1271_tx_flush(struct wl1271 *wl) 1138{ 1139 unsigned long timeout, start_time; 1140 int i; 1141 start_time = jiffies; 1142 timeout = start_time + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT); 1143 1144 /* only one flush should be in progress, for consistent queue state */ 1145 mutex_lock(&wl->flush_mutex); 1146 1147 mutex_lock(&wl->mutex); 1148 if (wl->tx_frames_cnt == 0 && wl1271_tx_total_queue_count(wl) == 0) { 1149 mutex_unlock(&wl->mutex); 1150 goto out; 1151 } 1152 1153 wlcore_stop_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH); 1154 1155 while (!time_after(jiffies, timeout)) { 1156 wl1271_debug(DEBUG_MAC80211, "flushing tx buffer: %d %d", 1157 wl->tx_frames_cnt, 1158 wl1271_tx_total_queue_count(wl)); 1159 1160 /* force Tx and give the driver some time to flush data */ 1161 mutex_unlock(&wl->mutex); 1162 if (wl1271_tx_total_queue_count(wl)) 1163 wl1271_tx_work(&wl->tx_work); 1164 msleep(20); 1165 mutex_lock(&wl->mutex); 1166 1167 if ((wl->tx_frames_cnt == 0) && 1168 (wl1271_tx_total_queue_count(wl) == 0)) { 1169 wl1271_debug(DEBUG_MAC80211, "tx flush took %d ms", 1170 jiffies_to_msecs(jiffies - start_time)); 1171 goto out_wake; 1172 } 1173 } 1174 1175 wl1271_warning("Unable to flush all TX buffers, " 1176 "timed out (timeout %d ms", 1177 WL1271_TX_FLUSH_TIMEOUT / 1000); 1178 1179 /* forcibly flush all Tx buffers on our queues */ 1180 for (i = 0; i < WL12XX_MAX_LINKS; i++) 1181 wl1271_tx_reset_link_queues(wl, i); 1182 1183out_wake: 1184 wlcore_wake_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH); 1185 mutex_unlock(&wl->mutex); 1186out: 1187 mutex_unlock(&wl->flush_mutex); 1188} 1189EXPORT_SYMBOL_GPL(wl1271_tx_flush); 1190 1191u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set) 1192{ 1193 if (WARN_ON(!rate_set)) 1194 return 0; 1195 1196 return BIT(__ffs(rate_set)); 1197} 1198EXPORT_SYMBOL_GPL(wl1271_tx_min_rate_get); 1199 1200void wlcore_stop_queue_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif, 1201 u8 queue, enum wlcore_queue_stop_reason reason) 1202{ 1203 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue); 1204 bool stopped = !!wl->queue_stop_reasons[hwq]; 1205 1206 /* queue should not be stopped for this reason */ 1207 WARN_ON_ONCE(test_and_set_bit(reason, &wl->queue_stop_reasons[hwq])); 1208 1209 if (stopped) 1210 return; 1211 1212 ieee80211_stop_queue(wl->hw, hwq); 1213} 1214 1215void wlcore_stop_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue, 1216 enum wlcore_queue_stop_reason reason) 1217{ 1218 unsigned long flags; 1219 1220 spin_lock_irqsave(&wl->wl_lock, flags); 1221 wlcore_stop_queue_locked(wl, wlvif, queue, reason); 1222 spin_unlock_irqrestore(&wl->wl_lock, flags); 1223} 1224 1225void wlcore_wake_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue, 1226 enum wlcore_queue_stop_reason reason) 1227{ 1228 unsigned long flags; 1229 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue); 1230 1231 spin_lock_irqsave(&wl->wl_lock, flags); 1232 1233 /* queue should not be clear for this reason */ 1234 WARN_ON_ONCE(!test_and_clear_bit(reason, &wl->queue_stop_reasons[hwq])); 1235 1236 if (wl->queue_stop_reasons[hwq]) 1237 goto out; 1238 1239 ieee80211_wake_queue(wl->hw, hwq); 1240 1241out: 1242 spin_unlock_irqrestore(&wl->wl_lock, flags); 1243} 1244 1245void wlcore_stop_queues(struct wl1271 *wl, 1246 enum wlcore_queue_stop_reason reason) 1247{ 1248 int i; 1249 unsigned long flags; 1250 1251 spin_lock_irqsave(&wl->wl_lock, flags); 1252 1253 /* mark all possible queues as stopped */ 1254 for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++) 1255 WARN_ON_ONCE(test_and_set_bit(reason, 1256 &wl->queue_stop_reasons[i])); 1257 1258 /* use the global version to make sure all vifs in mac80211 we don't 1259 * know are stopped. 1260 */ 1261 ieee80211_stop_queues(wl->hw); 1262 1263 spin_unlock_irqrestore(&wl->wl_lock, flags); 1264} 1265 1266void wlcore_wake_queues(struct wl1271 *wl, 1267 enum wlcore_queue_stop_reason reason) 1268{ 1269 int i; 1270 unsigned long flags; 1271 1272 spin_lock_irqsave(&wl->wl_lock, flags); 1273 1274 /* mark all possible queues as awake */ 1275 for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++) 1276 WARN_ON_ONCE(!test_and_clear_bit(reason, 1277 &wl->queue_stop_reasons[i])); 1278 1279 /* use the global version to make sure all vifs in mac80211 we don't 1280 * know are woken up. 1281 */ 1282 ieee80211_wake_queues(wl->hw); 1283 1284 spin_unlock_irqrestore(&wl->wl_lock, flags); 1285} 1286 1287bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl, 1288 struct wl12xx_vif *wlvif, u8 queue, 1289 enum wlcore_queue_stop_reason reason) 1290{ 1291 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue); 1292 return test_bit(reason, &wl->queue_stop_reasons[hwq]); 1293} 1294 1295bool wlcore_is_queue_stopped(struct wl1271 *wl, struct wl12xx_vif *wlvif, 1296 u8 queue) 1297{ 1298 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue); 1299 return !!wl->queue_stop_reasons[hwq]; 1300} 1301