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#include <linux/spinlock.h> 28 29#include "wlcore.h" 30#include "debug.h" 31#include "io.h" 32#include "ps.h" 33#include "tx.h" 34#include "event.h" 35#include "hw_ops.h" 36 37/* 38 * TODO: this is here just for now, it must be removed when the data 39 * operations are in place. 40 */ 41#include "../wl12xx/reg.h" 42 43static int wl1271_set_default_wep_key(struct wl1271 *wl, 44 struct wl12xx_vif *wlvif, u8 id) 45{ 46 int ret; 47 bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS); 48 49 if (is_ap) 50 ret = wl12xx_cmd_set_default_wep_key(wl, id, 51 wlvif->ap.bcast_hlid); 52 else 53 ret = wl12xx_cmd_set_default_wep_key(wl, id, wlvif->sta.hlid); 54 55 if (ret < 0) 56 return ret; 57 58 wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id); 59 return 0; 60} 61 62static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb) 63{ 64 int id; 65 66 id = find_first_zero_bit(wl->tx_frames_map, wl->num_tx_desc); 67 if (id >= wl->num_tx_desc) 68 return -EBUSY; 69 70 __set_bit(id, wl->tx_frames_map); 71 wl->tx_frames[id] = skb; 72 wl->tx_frames_cnt++; 73 return id; 74} 75 76void wl1271_free_tx_id(struct wl1271 *wl, int id) 77{ 78 if (__test_and_clear_bit(id, wl->tx_frames_map)) { 79 if (unlikely(wl->tx_frames_cnt == wl->num_tx_desc)) 80 clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); 81 82 wl->tx_frames[id] = NULL; 83 wl->tx_frames_cnt--; 84 } 85} 86EXPORT_SYMBOL(wl1271_free_tx_id); 87 88static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl, 89 struct wl12xx_vif *wlvif, 90 struct sk_buff *skb) 91{ 92 struct ieee80211_hdr *hdr; 93 94 hdr = (struct ieee80211_hdr *)(skb->data + 95 sizeof(struct wl1271_tx_hw_descr)); 96 if (!ieee80211_is_auth(hdr->frame_control)) 97 return; 98 99 /* 100 * add the station to the known list before transmitting the 101 * authentication response. this way it won't get de-authed by FW 102 * when transmitting too soon. 103 */ 104 wl1271_acx_set_inconnection_sta(wl, wlvif, hdr->addr1); 105 106 /* 107 * ROC for 1 second on the AP channel for completing the connection. 108 * Note the ROC will be continued by the update_sta_state callbacks 109 * once the station reaches the associated state. 110 */ 111 wlcore_update_inconn_sta(wl, wlvif, NULL, true); 112 wlvif->pending_auth_reply_time = jiffies; 113 cancel_delayed_work(&wlvif->pending_auth_complete_work); 114 ieee80211_queue_delayed_work(wl->hw, 115 &wlvif->pending_auth_complete_work, 116 msecs_to_jiffies(WLCORE_PEND_AUTH_ROC_TIMEOUT)); 117} 118 119static void wl1271_tx_regulate_link(struct wl1271 *wl, 120 struct wl12xx_vif *wlvif, 121 u8 hlid) 122{ 123 bool fw_ps; 124 u8 tx_pkts; 125 126 if (WARN_ON(!test_bit(hlid, wlvif->links_map))) 127 return; 128 129 fw_ps = test_bit(hlid, &wl->ap_fw_ps_map); 130 tx_pkts = wl->links[hlid].allocated_pkts; 131 132 /* 133 * if in FW PS and there is enough data in FW we can put the link 134 * into high-level PS and clean out its TX queues. 135 * Make an exception if this is the only connected link. In this 136 * case FW-memory congestion is less of a problem. 137 * Note that a single connected STA means 2*ap_count + 1 active links, 138 * since we must account for the global and broadcast AP links 139 * for each AP. The "fw_ps" check assures us the other link is a STA 140 * connected to the AP. Otherwise the FW would not set the PSM bit. 141 */ 142 if (wl->active_link_count > (wl->ap_count*2 + 1) && fw_ps && 143 tx_pkts >= WL1271_PS_STA_MAX_PACKETS) 144 wl12xx_ps_link_start(wl, wlvif, hlid, true); 145} 146 147bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb) 148{ 149 return wl->dummy_packet == skb; 150} 151EXPORT_SYMBOL(wl12xx_is_dummy_packet); 152 153static u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif, 154 struct sk_buff *skb, struct ieee80211_sta *sta) 155{ 156 if (sta) { 157 struct wl1271_station *wl_sta; 158 159 wl_sta = (struct wl1271_station *)sta->drv_priv; 160 return wl_sta->hlid; 161 } else { 162 struct ieee80211_hdr *hdr; 163 164 if (!test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags)) 165 return wl->system_hlid; 166 167 hdr = (struct ieee80211_hdr *)skb->data; 168 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 169 return wlvif->ap.bcast_hlid; 170 else 171 return wlvif->ap.global_hlid; 172 } 173} 174 175u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif, 176 struct sk_buff *skb, struct ieee80211_sta *sta) 177{ 178 struct ieee80211_tx_info *control; 179 180 if (wlvif->bss_type == BSS_TYPE_AP_BSS) 181 return wl12xx_tx_get_hlid_ap(wl, wlvif, skb, sta); 182 183 control = IEEE80211_SKB_CB(skb); 184 if (control->flags & IEEE80211_TX_CTL_TX_OFFCHAN) { 185 wl1271_debug(DEBUG_TX, "tx offchannel"); 186 return wlvif->dev_hlid; 187 } 188 189 return wlvif->sta.hlid; 190} 191 192unsigned int wlcore_calc_packet_alignment(struct wl1271 *wl, 193 unsigned int packet_length) 194{ 195 if ((wl->quirks & WLCORE_QUIRK_TX_PAD_LAST_FRAME) || 196 !(wl->quirks & WLCORE_QUIRK_TX_BLOCKSIZE_ALIGN)) 197 return ALIGN(packet_length, WL1271_TX_ALIGN_TO); 198 else 199 return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE); 200} 201EXPORT_SYMBOL(wlcore_calc_packet_alignment); 202 203static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif, 204 struct sk_buff *skb, u32 extra, u32 buf_offset, 205 u8 hlid, bool is_gem) 206{ 207 struct wl1271_tx_hw_descr *desc; 208 u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra; 209 u32 total_blocks; 210 int id, ret = -EBUSY, ac; 211 u32 spare_blocks; 212 213 if (buf_offset + total_len > wl->aggr_buf_size) 214 return -EAGAIN; 215 216 spare_blocks = wlcore_hw_get_spare_blocks(wl, is_gem); 217 218 /* allocate free identifier for the packet */ 219 id = wl1271_alloc_tx_id(wl, skb); 220 if (id < 0) 221 return id; 222 223 total_blocks = wlcore_hw_calc_tx_blocks(wl, total_len, spare_blocks); 224 225 if (total_blocks <= wl->tx_blocks_available) { 226 desc = (struct wl1271_tx_hw_descr *)skb_push( 227 skb, total_len - skb->len); 228 229 wlcore_hw_set_tx_desc_blocks(wl, desc, total_blocks, 230 spare_blocks); 231 232 desc->id = id; 233 234 wl->tx_blocks_available -= total_blocks; 235 wl->tx_allocated_blocks += total_blocks; 236 237 /* 238 * If the FW was empty before, arm the Tx watchdog. Also do 239 * this on the first Tx after resume, as we always cancel the 240 * watchdog on suspend. 241 */ 242 if (wl->tx_allocated_blocks == total_blocks || 243 test_and_clear_bit(WL1271_FLAG_REINIT_TX_WDOG, &wl->flags)) 244 wl12xx_rearm_tx_watchdog_locked(wl); 245 246 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); 247 wl->tx_allocated_pkts[ac]++; 248 249 if (test_bit(hlid, wl->links_map)) 250 wl->links[hlid].allocated_pkts++; 251 252 ret = 0; 253 254 wl1271_debug(DEBUG_TX, 255 "tx_allocate: size: %d, blocks: %d, id: %d", 256 total_len, total_blocks, id); 257 } else { 258 wl1271_free_tx_id(wl, id); 259 } 260 261 return ret; 262} 263 264static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif, 265 struct sk_buff *skb, u32 extra, 266 struct ieee80211_tx_info *control, u8 hlid) 267{ 268 struct timespec ts; 269 struct wl1271_tx_hw_descr *desc; 270 int ac, rate_idx; 271 s64 hosttime; 272 u16 tx_attr = 0; 273 __le16 frame_control; 274 struct ieee80211_hdr *hdr; 275 u8 *frame_start; 276 bool is_dummy; 277 278 desc = (struct wl1271_tx_hw_descr *) skb->data; 279 frame_start = (u8 *)(desc + 1); 280 hdr = (struct ieee80211_hdr *)(frame_start + extra); 281 frame_control = hdr->frame_control; 282 283 /* relocate space for security header */ 284 if (extra) { 285 int hdrlen = ieee80211_hdrlen(frame_control); 286 memmove(frame_start, hdr, hdrlen); 287 skb_set_network_header(skb, skb_network_offset(skb) + extra); 288 } 289 290 /* configure packet life time */ 291 getnstimeofday(&ts); 292 hosttime = (timespec_to_ns(&ts) >> 10); 293 desc->start_time = cpu_to_le32(hosttime - wl->time_offset); 294 295 is_dummy = wl12xx_is_dummy_packet(wl, skb); 296 if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS) 297 desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU); 298 else 299 desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU); 300 301 /* queue */ 302 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); 303 desc->tid = skb->priority; 304 305 if (is_dummy) { 306 /* 307 * FW expects the dummy packet to have an invalid session id - 308 * any session id that is different than the one set in the join 309 */ 310 tx_attr = (SESSION_COUNTER_INVALID << 311 TX_HW_ATTR_OFST_SESSION_COUNTER) & 312 TX_HW_ATTR_SESSION_COUNTER; 313 314 tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ; 315 } else if (wlvif) { 316 u8 session_id = wl->session_ids[hlid]; 317 318 if ((wl->quirks & WLCORE_QUIRK_AP_ZERO_SESSION_ID) && 319 (wlvif->bss_type == BSS_TYPE_AP_BSS)) 320 session_id = 0; 321 322 /* configure the tx attributes */ 323 tx_attr = session_id << TX_HW_ATTR_OFST_SESSION_COUNTER; 324 } 325 326 desc->hlid = hlid; 327 if (is_dummy || !wlvif) 328 rate_idx = 0; 329 else if (wlvif->bss_type != BSS_TYPE_AP_BSS) { 330 /* 331 * if the packets are data packets 332 * send them with AP rate policies (EAPOLs are an exception), 333 * otherwise use default basic rates 334 */ 335 if (skb->protocol == cpu_to_be16(ETH_P_PAE)) 336 rate_idx = wlvif->sta.basic_rate_idx; 337 else if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE) 338 rate_idx = wlvif->sta.p2p_rate_idx; 339 else if (ieee80211_is_data(frame_control)) 340 rate_idx = wlvif->sta.ap_rate_idx; 341 else 342 rate_idx = wlvif->sta.basic_rate_idx; 343 } else { 344 if (hlid == wlvif->ap.global_hlid) 345 rate_idx = wlvif->ap.mgmt_rate_idx; 346 else if (hlid == wlvif->ap.bcast_hlid || 347 skb->protocol == cpu_to_be16(ETH_P_PAE) || 348 !ieee80211_is_data(frame_control)) 349 /* 350 * send non-data, bcast and EAPOLs using the 351 * min basic rate 352 */ 353 rate_idx = wlvif->ap.bcast_rate_idx; 354 else 355 rate_idx = wlvif->ap.ucast_rate_idx[ac]; 356 } 357 358 tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY; 359 360 /* for WEP shared auth - no fw encryption is needed */ 361 if (ieee80211_is_auth(frame_control) && 362 ieee80211_has_protected(frame_control)) 363 tx_attr |= TX_HW_ATTR_HOST_ENCRYPT; 364 365 /* send EAPOL frames as voice */ 366 if (control->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) 367 tx_attr |= TX_HW_ATTR_EAPOL_FRAME; 368 369 desc->tx_attr = cpu_to_le16(tx_attr); 370 371 wlcore_hw_set_tx_desc_csum(wl, desc, skb); 372 wlcore_hw_set_tx_desc_data_len(wl, desc, skb); 373} 374 375/* caller must hold wl->mutex */ 376static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif, 377 struct sk_buff *skb, u32 buf_offset, u8 hlid) 378{ 379 struct ieee80211_tx_info *info; 380 u32 extra = 0; 381 int ret = 0; 382 u32 total_len; 383 bool is_dummy; 384 bool is_gem = false; 385 386 if (!skb) { 387 wl1271_error("discarding null skb"); 388 return -EINVAL; 389 } 390 391 if (hlid == WL12XX_INVALID_LINK_ID) { 392 wl1271_error("invalid hlid. dropping skb 0x%p", skb); 393 return -EINVAL; 394 } 395 396 info = IEEE80211_SKB_CB(skb); 397 398 is_dummy = wl12xx_is_dummy_packet(wl, skb); 399 400 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) && 401 info->control.hw_key && 402 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) 403 extra = WL1271_EXTRA_SPACE_TKIP; 404 405 if (info->control.hw_key) { 406 bool is_wep; 407 u8 idx = info->control.hw_key->hw_key_idx; 408 u32 cipher = info->control.hw_key->cipher; 409 410 is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) || 411 (cipher == WLAN_CIPHER_SUITE_WEP104); 412 413 if (WARN_ON(is_wep && wlvif && wlvif->default_key != idx)) { 414 ret = wl1271_set_default_wep_key(wl, wlvif, idx); 415 if (ret < 0) 416 return ret; 417 wlvif->default_key = idx; 418 } 419 420 is_gem = (cipher == WL1271_CIPHER_SUITE_GEM); 421 } 422 423 ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid, 424 is_gem); 425 if (ret < 0) 426 return ret; 427 428 wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid); 429 430 if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) { 431 wl1271_tx_ap_update_inconnection_sta(wl, wlvif, skb); 432 wl1271_tx_regulate_link(wl, wlvif, hlid); 433 } 434 435 /* 436 * The length of each packet is stored in terms of 437 * words. Thus, we must pad the skb data to make sure its 438 * length is aligned. The number of padding bytes is computed 439 * and set in wl1271_tx_fill_hdr. 440 * In special cases, we want to align to a specific block size 441 * (eg. for wl128x with SDIO we align to 256). 442 */ 443 total_len = wlcore_calc_packet_alignment(wl, skb->len); 444 445 memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len); 446 memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len); 447 448 /* Revert side effects in the dummy packet skb, so it can be reused */ 449 if (is_dummy) 450 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); 451 452 return total_len; 453} 454 455u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set, 456 enum ieee80211_band rate_band) 457{ 458 struct ieee80211_supported_band *band; 459 u32 enabled_rates = 0; 460 int bit; 461 462 band = wl->hw->wiphy->bands[rate_band]; 463 for (bit = 0; bit < band->n_bitrates; bit++) { 464 if (rate_set & 0x1) 465 enabled_rates |= band->bitrates[bit].hw_value; 466 rate_set >>= 1; 467 } 468 469 /* MCS rates indication are on bits 16 - 31 */ 470 rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates; 471 472 for (bit = 0; bit < 16; bit++) { 473 if (rate_set & 0x1) 474 enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit); 475 rate_set >>= 1; 476 } 477 478 return enabled_rates; 479} 480 481void wl1271_handle_tx_low_watermark(struct wl1271 *wl) 482{ 483 int i; 484 struct wl12xx_vif *wlvif; 485 486 wl12xx_for_each_wlvif(wl, wlvif) { 487 for (i = 0; i < NUM_TX_QUEUES; i++) { 488 if (wlcore_is_queue_stopped_by_reason(wl, wlvif, i, 489 WLCORE_QUEUE_STOP_REASON_WATERMARK) && 490 wlvif->tx_queue_count[i] <= 491 WL1271_TX_QUEUE_LOW_WATERMARK) 492 /* firmware buffer has space, restart queues */ 493 wlcore_wake_queue(wl, wlvif, i, 494 WLCORE_QUEUE_STOP_REASON_WATERMARK); 495 } 496 } 497} 498 499static int wlcore_select_ac(struct wl1271 *wl) 500{ 501 int i, q = -1, ac; 502 u32 min_pkts = 0xffffffff; 503 504 /* 505 * Find a non-empty ac where: 506 * 1. There are packets to transmit 507 * 2. The FW has the least allocated blocks 508 * 509 * We prioritize the ACs according to VO>VI>BE>BK 510 */ 511 for (i = 0; i < NUM_TX_QUEUES; i++) { 512 ac = wl1271_tx_get_queue(i); 513 if (wl->tx_queue_count[ac] && 514 wl->tx_allocated_pkts[ac] < min_pkts) { 515 q = ac; 516 min_pkts = wl->tx_allocated_pkts[q]; 517 } 518 } 519 520 return q; 521} 522 523static struct sk_buff *wlcore_lnk_dequeue(struct wl1271 *wl, 524 struct wl1271_link *lnk, u8 q) 525{ 526 struct sk_buff *skb; 527 unsigned long flags; 528 529 skb = skb_dequeue(&lnk->tx_queue[q]); 530 if (skb) { 531 spin_lock_irqsave(&wl->wl_lock, flags); 532 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0); 533 wl->tx_queue_count[q]--; 534 if (lnk->wlvif) { 535 WARN_ON_ONCE(lnk->wlvif->tx_queue_count[q] <= 0); 536 lnk->wlvif->tx_queue_count[q]--; 537 } 538 spin_unlock_irqrestore(&wl->wl_lock, flags); 539 } 540 541 return skb; 542} 543 544static struct sk_buff *wlcore_lnk_dequeue_high_prio(struct wl1271 *wl, 545 u8 hlid, u8 ac, 546 u8 *low_prio_hlid) 547{ 548 struct wl1271_link *lnk = &wl->links[hlid]; 549 550 if (!wlcore_hw_lnk_high_prio(wl, hlid, lnk)) { 551 if (*low_prio_hlid == WL12XX_INVALID_LINK_ID && 552 !skb_queue_empty(&lnk->tx_queue[ac]) && 553 wlcore_hw_lnk_low_prio(wl, hlid, lnk)) 554 /* we found the first non-empty low priority queue */ 555 *low_prio_hlid = hlid; 556 557 return NULL; 558 } 559 560 return wlcore_lnk_dequeue(wl, lnk, ac); 561} 562 563static struct sk_buff *wlcore_vif_dequeue_high_prio(struct wl1271 *wl, 564 struct wl12xx_vif *wlvif, 565 u8 ac, u8 *hlid, 566 u8 *low_prio_hlid) 567{ 568 struct sk_buff *skb = NULL; 569 int i, h, start_hlid; 570 571 /* start from the link after the last one */ 572 start_hlid = (wlvif->last_tx_hlid + 1) % wl->num_links; 573 574 /* dequeue according to AC, round robin on each link */ 575 for (i = 0; i < wl->num_links; i++) { 576 h = (start_hlid + i) % wl->num_links; 577 578 /* only consider connected stations */ 579 if (!test_bit(h, wlvif->links_map)) 580 continue; 581 582 skb = wlcore_lnk_dequeue_high_prio(wl, h, ac, 583 low_prio_hlid); 584 if (!skb) 585 continue; 586 587 wlvif->last_tx_hlid = h; 588 break; 589 } 590 591 if (!skb) 592 wlvif->last_tx_hlid = 0; 593 594 *hlid = wlvif->last_tx_hlid; 595 return skb; 596} 597 598static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl, u8 *hlid) 599{ 600 unsigned long flags; 601 struct wl12xx_vif *wlvif = wl->last_wlvif; 602 struct sk_buff *skb = NULL; 603 int ac; 604 u8 low_prio_hlid = WL12XX_INVALID_LINK_ID; 605 606 ac = wlcore_select_ac(wl); 607 if (ac < 0) 608 goto out; 609 610 /* continue from last wlvif (round robin) */ 611 if (wlvif) { 612 wl12xx_for_each_wlvif_continue(wl, wlvif) { 613 if (!wlvif->tx_queue_count[ac]) 614 continue; 615 616 skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid, 617 &low_prio_hlid); 618 if (!skb) 619 continue; 620 621 wl->last_wlvif = wlvif; 622 break; 623 } 624 } 625 626 /* dequeue from the system HLID before the restarting wlvif list */ 627 if (!skb) { 628 skb = wlcore_lnk_dequeue_high_prio(wl, wl->system_hlid, 629 ac, &low_prio_hlid); 630 if (skb) { 631 *hlid = wl->system_hlid; 632 wl->last_wlvif = NULL; 633 } 634 } 635 636 /* Do a new pass over the wlvif list. But no need to continue 637 * after last_wlvif. The previous pass should have found it. */ 638 if (!skb) { 639 wl12xx_for_each_wlvif(wl, wlvif) { 640 if (!wlvif->tx_queue_count[ac]) 641 goto next; 642 643 skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid, 644 &low_prio_hlid); 645 if (skb) { 646 wl->last_wlvif = wlvif; 647 break; 648 } 649 650next: 651 if (wlvif == wl->last_wlvif) 652 break; 653 } 654 } 655 656 /* no high priority skbs found - but maybe a low priority one? */ 657 if (!skb && low_prio_hlid != WL12XX_INVALID_LINK_ID) { 658 struct wl1271_link *lnk = &wl->links[low_prio_hlid]; 659 skb = wlcore_lnk_dequeue(wl, lnk, ac); 660 661 WARN_ON(!skb); /* we checked this before */ 662 *hlid = low_prio_hlid; 663 664 /* ensure proper round robin in the vif/link levels */ 665 wl->last_wlvif = lnk->wlvif; 666 if (lnk->wlvif) 667 lnk->wlvif->last_tx_hlid = low_prio_hlid; 668 669 } 670 671out: 672 if (!skb && 673 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) { 674 int q; 675 676 skb = wl->dummy_packet; 677 *hlid = wl->system_hlid; 678 q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); 679 spin_lock_irqsave(&wl->wl_lock, flags); 680 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0); 681 wl->tx_queue_count[q]--; 682 spin_unlock_irqrestore(&wl->wl_lock, flags); 683 } 684 685 return skb; 686} 687 688static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif, 689 struct sk_buff *skb, u8 hlid) 690{ 691 unsigned long flags; 692 int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb)); 693 694 if (wl12xx_is_dummy_packet(wl, skb)) { 695 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags); 696 } else { 697 skb_queue_head(&wl->links[hlid].tx_queue[q], skb); 698 699 /* make sure we dequeue the same packet next time */ 700 wlvif->last_tx_hlid = (hlid + wl->num_links - 1) % 701 wl->num_links; 702 } 703 704 spin_lock_irqsave(&wl->wl_lock, flags); 705 wl->tx_queue_count[q]++; 706 if (wlvif) 707 wlvif->tx_queue_count[q]++; 708 spin_unlock_irqrestore(&wl->wl_lock, flags); 709} 710 711static bool wl1271_tx_is_data_present(struct sk_buff *skb) 712{ 713 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); 714 715 return ieee80211_is_data_present(hdr->frame_control); 716} 717 718void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids) 719{ 720 struct wl12xx_vif *wlvif; 721 u32 timeout; 722 u8 hlid; 723 724 if (!wl->conf.rx_streaming.interval) 725 return; 726 727 if (!wl->conf.rx_streaming.always && 728 !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags)) 729 return; 730 731 timeout = wl->conf.rx_streaming.duration; 732 wl12xx_for_each_wlvif_sta(wl, wlvif) { 733 bool found = false; 734 for_each_set_bit(hlid, active_hlids, wl->num_links) { 735 if (test_bit(hlid, wlvif->links_map)) { 736 found = true; 737 break; 738 } 739 } 740 741 if (!found) 742 continue; 743 744 /* enable rx streaming */ 745 if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags)) 746 ieee80211_queue_work(wl->hw, 747 &wlvif->rx_streaming_enable_work); 748 749 mod_timer(&wlvif->rx_streaming_timer, 750 jiffies + msecs_to_jiffies(timeout)); 751 } 752} 753 754/* 755 * Returns failure values only in case of failed bus ops within this function. 756 * wl1271_prepare_tx_frame retvals won't be returned in order to avoid 757 * triggering recovery by higher layers when not necessary. 758 * In case a FW command fails within wl1271_prepare_tx_frame fails a recovery 759 * will be queued in wl1271_cmd_send. -EAGAIN/-EBUSY from prepare_tx_frame 760 * can occur and are legitimate so don't propagate. -EINVAL will emit a WARNING 761 * within prepare_tx_frame code but there's nothing we should do about those 762 * as well. 763 */ 764int wlcore_tx_work_locked(struct wl1271 *wl) 765{ 766 struct wl12xx_vif *wlvif; 767 struct sk_buff *skb; 768 struct wl1271_tx_hw_descr *desc; 769 u32 buf_offset = 0, last_len = 0; 770 bool sent_packets = false; 771 unsigned long active_hlids[BITS_TO_LONGS(WLCORE_MAX_LINKS)] = {0}; 772 int ret = 0; 773 int bus_ret = 0; 774 u8 hlid; 775 776 if (unlikely(wl->state != WLCORE_STATE_ON)) 777 return 0; 778 779 while ((skb = wl1271_skb_dequeue(wl, &hlid))) { 780 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 781 bool has_data = false; 782 783 wlvif = NULL; 784 if (!wl12xx_is_dummy_packet(wl, skb)) 785 wlvif = wl12xx_vif_to_data(info->control.vif); 786 else 787 hlid = wl->system_hlid; 788 789 has_data = wlvif && wl1271_tx_is_data_present(skb); 790 ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset, 791 hlid); 792 if (ret == -EAGAIN) { 793 /* 794 * Aggregation buffer is full. 795 * Flush buffer and try again. 796 */ 797 wl1271_skb_queue_head(wl, wlvif, skb, hlid); 798 799 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset, 800 last_len); 801 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA, 802 wl->aggr_buf, buf_offset, true); 803 if (bus_ret < 0) 804 goto out; 805 806 sent_packets = true; 807 buf_offset = 0; 808 continue; 809 } else if (ret == -EBUSY) { 810 /* 811 * Firmware buffer is full. 812 * Queue back last skb, and stop aggregating. 813 */ 814 wl1271_skb_queue_head(wl, wlvif, skb, hlid); 815 /* No work left, avoid scheduling redundant tx work */ 816 set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags); 817 goto out_ack; 818 } else if (ret < 0) { 819 if (wl12xx_is_dummy_packet(wl, skb)) 820 /* 821 * fw still expects dummy packet, 822 * so re-enqueue it 823 */ 824 wl1271_skb_queue_head(wl, wlvif, skb, hlid); 825 else 826 ieee80211_free_txskb(wl->hw, skb); 827 goto out_ack; 828 } 829 last_len = ret; 830 buf_offset += last_len; 831 wl->tx_packets_count++; 832 if (has_data) { 833 desc = (struct wl1271_tx_hw_descr *) skb->data; 834 __set_bit(desc->hlid, active_hlids); 835 } 836 } 837 838out_ack: 839 if (buf_offset) { 840 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset, last_len); 841 bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf, 842 buf_offset, true); 843 if (bus_ret < 0) 844 goto out; 845 846 sent_packets = true; 847 } 848 if (sent_packets) { 849 /* 850 * Interrupt the firmware with the new packets. This is only 851 * required for older hardware revisions 852 */ 853 if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION) { 854 bus_ret = wlcore_write32(wl, WL12XX_HOST_WR_ACCESS, 855 wl->tx_packets_count); 856 if (bus_ret < 0) 857 goto out; 858 } 859 860 wl1271_handle_tx_low_watermark(wl); 861 } 862 wl12xx_rearm_rx_streaming(wl, active_hlids); 863 864out: 865 return bus_ret; 866} 867 868void wl1271_tx_work(struct work_struct *work) 869{ 870 struct wl1271 *wl = container_of(work, struct wl1271, tx_work); 871 int ret; 872 873 mutex_lock(&wl->mutex); 874 ret = wl1271_ps_elp_wakeup(wl); 875 if (ret < 0) 876 goto out; 877 878 ret = wlcore_tx_work_locked(wl); 879 if (ret < 0) { 880 wl12xx_queue_recovery_work(wl); 881 goto out; 882 } 883 884 wl1271_ps_elp_sleep(wl); 885out: 886 mutex_unlock(&wl->mutex); 887} 888 889static u8 wl1271_tx_get_rate_flags(u8 rate_class_index) 890{ 891 u8 flags = 0; 892 893 /* 894 * TODO: use wl12xx constants when this code is moved to wl12xx, as 895 * only it uses Tx-completion. 896 */ 897 if (rate_class_index <= 8) 898 flags |= IEEE80211_TX_RC_MCS; 899 900 /* 901 * TODO: use wl12xx constants when this code is moved to wl12xx, as 902 * only it uses Tx-completion. 903 */ 904 if (rate_class_index == 0) 905 flags |= IEEE80211_TX_RC_SHORT_GI; 906 907 return flags; 908} 909 910static void wl1271_tx_complete_packet(struct wl1271 *wl, 911 struct wl1271_tx_hw_res_descr *result) 912{ 913 struct ieee80211_tx_info *info; 914 struct ieee80211_vif *vif; 915 struct wl12xx_vif *wlvif; 916 struct sk_buff *skb; 917 int id = result->id; 918 int rate = -1; 919 u8 rate_flags = 0; 920 u8 retries = 0; 921 922 /* check for id legality */ 923 if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) { 924 wl1271_warning("TX result illegal id: %d", id); 925 return; 926 } 927 928 skb = wl->tx_frames[id]; 929 info = IEEE80211_SKB_CB(skb); 930 931 if (wl12xx_is_dummy_packet(wl, skb)) { 932 wl1271_free_tx_id(wl, id); 933 return; 934 } 935 936 /* info->control is valid as long as we don't update info->status */ 937 vif = info->control.vif; 938 wlvif = wl12xx_vif_to_data(vif); 939 940 /* update the TX status info */ 941 if (result->status == TX_SUCCESS) { 942 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 943 info->flags |= IEEE80211_TX_STAT_ACK; 944 rate = wlcore_rate_to_idx(wl, result->rate_class_index, 945 wlvif->band); 946 rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index); 947 retries = result->ack_failures; 948 } else if (result->status == TX_RETRY_EXCEEDED) { 949 wl->stats.excessive_retries++; 950 retries = result->ack_failures; 951 } 952 953 info->status.rates[0].idx = rate; 954 info->status.rates[0].count = retries; 955 info->status.rates[0].flags = rate_flags; 956 info->status.ack_signal = -1; 957 958 wl->stats.retry_count += result->ack_failures; 959 960 /* remove private header from packet */ 961 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); 962 963 /* remove TKIP header space if present */ 964 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) && 965 info->control.hw_key && 966 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { 967 int hdrlen = ieee80211_get_hdrlen_from_skb(skb); 968 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data, 969 hdrlen); 970 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP); 971 } 972 973 wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x" 974 " status 0x%x", 975 result->id, skb, result->ack_failures, 976 result->rate_class_index, result->status); 977 978 /* return the packet to the stack */ 979 skb_queue_tail(&wl->deferred_tx_queue, skb); 980 queue_work(wl->freezable_wq, &wl->netstack_work); 981 wl1271_free_tx_id(wl, result->id); 982} 983 984/* Called upon reception of a TX complete interrupt */ 985int wlcore_tx_complete(struct wl1271 *wl) 986{ 987 struct wl1271_acx_mem_map *memmap = wl->target_mem_map; 988 u32 count, fw_counter; 989 u32 i; 990 int ret; 991 992 /* read the tx results from the chipset */ 993 ret = wlcore_read(wl, le32_to_cpu(memmap->tx_result), 994 wl->tx_res_if, sizeof(*wl->tx_res_if), false); 995 if (ret < 0) 996 goto out; 997 998 fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter); 999 1000 /* write host counter to chipset (to ack) */ 1001 ret = wlcore_write32(wl, le32_to_cpu(memmap->tx_result) + 1002 offsetof(struct wl1271_tx_hw_res_if, 1003 tx_result_host_counter), fw_counter); 1004 if (ret < 0) 1005 goto out; 1006 1007 count = fw_counter - wl->tx_results_count; 1008 wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count); 1009 1010 /* verify that the result buffer is not getting overrun */ 1011 if (unlikely(count > TX_HW_RESULT_QUEUE_LEN)) 1012 wl1271_warning("TX result overflow from chipset: %d", count); 1013 1014 /* process the results */ 1015 for (i = 0; i < count; i++) { 1016 struct wl1271_tx_hw_res_descr *result; 1017 u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK; 1018 1019 /* process the packet */ 1020 result = &(wl->tx_res_if->tx_results_queue[offset]); 1021 wl1271_tx_complete_packet(wl, result); 1022 1023 wl->tx_results_count++; 1024 } 1025 1026out: 1027 return ret; 1028} 1029EXPORT_SYMBOL(wlcore_tx_complete); 1030 1031void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid) 1032{ 1033 struct sk_buff *skb; 1034 int i; 1035 unsigned long flags; 1036 struct ieee80211_tx_info *info; 1037 int total[NUM_TX_QUEUES]; 1038 struct wl1271_link *lnk = &wl->links[hlid]; 1039 1040 for (i = 0; i < NUM_TX_QUEUES; i++) { 1041 total[i] = 0; 1042 while ((skb = skb_dequeue(&lnk->tx_queue[i]))) { 1043 wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb); 1044 1045 if (!wl12xx_is_dummy_packet(wl, skb)) { 1046 info = IEEE80211_SKB_CB(skb); 1047 info->status.rates[0].idx = -1; 1048 info->status.rates[0].count = 0; 1049 ieee80211_tx_status_ni(wl->hw, skb); 1050 } 1051 1052 total[i]++; 1053 } 1054 } 1055 1056 spin_lock_irqsave(&wl->wl_lock, flags); 1057 for (i = 0; i < NUM_TX_QUEUES; i++) { 1058 wl->tx_queue_count[i] -= total[i]; 1059 if (lnk->wlvif) 1060 lnk->wlvif->tx_queue_count[i] -= total[i]; 1061 } 1062 spin_unlock_irqrestore(&wl->wl_lock, flags); 1063 1064 wl1271_handle_tx_low_watermark(wl); 1065} 1066 1067/* caller must hold wl->mutex and TX must be stopped */ 1068void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif) 1069{ 1070 int i; 1071 1072 /* TX failure */ 1073 for_each_set_bit(i, wlvif->links_map, wl->num_links) { 1074 if (wlvif->bss_type == BSS_TYPE_AP_BSS && 1075 i != wlvif->ap.bcast_hlid && i != wlvif->ap.global_hlid) { 1076 /* this calls wl12xx_free_link */ 1077 wl1271_free_sta(wl, wlvif, i); 1078 } else { 1079 u8 hlid = i; 1080 wl12xx_free_link(wl, wlvif, &hlid); 1081 } 1082 } 1083 wlvif->last_tx_hlid = 0; 1084 1085 for (i = 0; i < NUM_TX_QUEUES; i++) 1086 wlvif->tx_queue_count[i] = 0; 1087} 1088/* caller must hold wl->mutex and TX must be stopped */ 1089void wl12xx_tx_reset(struct wl1271 *wl) 1090{ 1091 int i; 1092 struct sk_buff *skb; 1093 struct ieee80211_tx_info *info; 1094 1095 /* only reset the queues if something bad happened */ 1096 if (wl1271_tx_total_queue_count(wl) != 0) { 1097 for (i = 0; i < wl->num_links; i++) 1098 wl1271_tx_reset_link_queues(wl, i); 1099 1100 for (i = 0; i < NUM_TX_QUEUES; i++) 1101 wl->tx_queue_count[i] = 0; 1102 } 1103 1104 /* 1105 * Make sure the driver is at a consistent state, in case this 1106 * function is called from a context other than interface removal. 1107 * This call will always wake the TX queues. 1108 */ 1109 wl1271_handle_tx_low_watermark(wl); 1110 1111 for (i = 0; i < wl->num_tx_desc; i++) { 1112 if (wl->tx_frames[i] == NULL) 1113 continue; 1114 1115 skb = wl->tx_frames[i]; 1116 wl1271_free_tx_id(wl, i); 1117 wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb); 1118 1119 if (!wl12xx_is_dummy_packet(wl, skb)) { 1120 /* 1121 * Remove private headers before passing the skb to 1122 * mac80211 1123 */ 1124 info = IEEE80211_SKB_CB(skb); 1125 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr)); 1126 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) && 1127 info->control.hw_key && 1128 info->control.hw_key->cipher == 1129 WLAN_CIPHER_SUITE_TKIP) { 1130 int hdrlen = ieee80211_get_hdrlen_from_skb(skb); 1131 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, 1132 skb->data, hdrlen); 1133 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP); 1134 } 1135 1136 info->status.rates[0].idx = -1; 1137 info->status.rates[0].count = 0; 1138 1139 ieee80211_tx_status_ni(wl->hw, skb); 1140 } 1141 } 1142} 1143 1144#define WL1271_TX_FLUSH_TIMEOUT 500000 1145 1146/* caller must *NOT* hold wl->mutex */ 1147void wl1271_tx_flush(struct wl1271 *wl) 1148{ 1149 unsigned long timeout, start_time; 1150 int i; 1151 start_time = jiffies; 1152 timeout = start_time + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT); 1153 1154 /* only one flush should be in progress, for consistent queue state */ 1155 mutex_lock(&wl->flush_mutex); 1156 1157 mutex_lock(&wl->mutex); 1158 if (wl->tx_frames_cnt == 0 && wl1271_tx_total_queue_count(wl) == 0) { 1159 mutex_unlock(&wl->mutex); 1160 goto out; 1161 } 1162 1163 wlcore_stop_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH); 1164 1165 while (!time_after(jiffies, timeout)) { 1166 wl1271_debug(DEBUG_MAC80211, "flushing tx buffer: %d %d", 1167 wl->tx_frames_cnt, 1168 wl1271_tx_total_queue_count(wl)); 1169 1170 /* force Tx and give the driver some time to flush data */ 1171 mutex_unlock(&wl->mutex); 1172 if (wl1271_tx_total_queue_count(wl)) 1173 wl1271_tx_work(&wl->tx_work); 1174 msleep(20); 1175 mutex_lock(&wl->mutex); 1176 1177 if ((wl->tx_frames_cnt == 0) && 1178 (wl1271_tx_total_queue_count(wl) == 0)) { 1179 wl1271_debug(DEBUG_MAC80211, "tx flush took %d ms", 1180 jiffies_to_msecs(jiffies - start_time)); 1181 goto out_wake; 1182 } 1183 } 1184 1185 wl1271_warning("Unable to flush all TX buffers, " 1186 "timed out (timeout %d ms", 1187 WL1271_TX_FLUSH_TIMEOUT / 1000); 1188 1189 /* forcibly flush all Tx buffers on our queues */ 1190 for (i = 0; i < wl->num_links; i++) 1191 wl1271_tx_reset_link_queues(wl, i); 1192 1193out_wake: 1194 wlcore_wake_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH); 1195 mutex_unlock(&wl->mutex); 1196out: 1197 mutex_unlock(&wl->flush_mutex); 1198} 1199EXPORT_SYMBOL_GPL(wl1271_tx_flush); 1200 1201u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set) 1202{ 1203 if (WARN_ON(!rate_set)) 1204 return 0; 1205 1206 return BIT(__ffs(rate_set)); 1207} 1208EXPORT_SYMBOL_GPL(wl1271_tx_min_rate_get); 1209 1210void wlcore_stop_queue_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif, 1211 u8 queue, enum wlcore_queue_stop_reason reason) 1212{ 1213 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue); 1214 bool stopped = !!wl->queue_stop_reasons[hwq]; 1215 1216 /* queue should not be stopped for this reason */ 1217 WARN_ON_ONCE(test_and_set_bit(reason, &wl->queue_stop_reasons[hwq])); 1218 1219 if (stopped) 1220 return; 1221 1222 ieee80211_stop_queue(wl->hw, hwq); 1223} 1224 1225void wlcore_stop_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue, 1226 enum wlcore_queue_stop_reason reason) 1227{ 1228 unsigned long flags; 1229 1230 spin_lock_irqsave(&wl->wl_lock, flags); 1231 wlcore_stop_queue_locked(wl, wlvif, queue, reason); 1232 spin_unlock_irqrestore(&wl->wl_lock, flags); 1233} 1234 1235void wlcore_wake_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue, 1236 enum wlcore_queue_stop_reason reason) 1237{ 1238 unsigned long flags; 1239 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue); 1240 1241 spin_lock_irqsave(&wl->wl_lock, flags); 1242 1243 /* queue should not be clear for this reason */ 1244 WARN_ON_ONCE(!test_and_clear_bit(reason, &wl->queue_stop_reasons[hwq])); 1245 1246 if (wl->queue_stop_reasons[hwq]) 1247 goto out; 1248 1249 ieee80211_wake_queue(wl->hw, hwq); 1250 1251out: 1252 spin_unlock_irqrestore(&wl->wl_lock, flags); 1253} 1254 1255void wlcore_stop_queues(struct wl1271 *wl, 1256 enum wlcore_queue_stop_reason reason) 1257{ 1258 int i; 1259 unsigned long flags; 1260 1261 spin_lock_irqsave(&wl->wl_lock, flags); 1262 1263 /* mark all possible queues as stopped */ 1264 for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++) 1265 WARN_ON_ONCE(test_and_set_bit(reason, 1266 &wl->queue_stop_reasons[i])); 1267 1268 /* use the global version to make sure all vifs in mac80211 we don't 1269 * know are stopped. 1270 */ 1271 ieee80211_stop_queues(wl->hw); 1272 1273 spin_unlock_irqrestore(&wl->wl_lock, flags); 1274} 1275 1276void wlcore_wake_queues(struct wl1271 *wl, 1277 enum wlcore_queue_stop_reason reason) 1278{ 1279 int i; 1280 unsigned long flags; 1281 1282 spin_lock_irqsave(&wl->wl_lock, flags); 1283 1284 /* mark all possible queues as awake */ 1285 for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++) 1286 WARN_ON_ONCE(!test_and_clear_bit(reason, 1287 &wl->queue_stop_reasons[i])); 1288 1289 /* use the global version to make sure all vifs in mac80211 we don't 1290 * know are woken up. 1291 */ 1292 ieee80211_wake_queues(wl->hw); 1293 1294 spin_unlock_irqrestore(&wl->wl_lock, flags); 1295} 1296 1297bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl, 1298 struct wl12xx_vif *wlvif, u8 queue, 1299 enum wlcore_queue_stop_reason reason) 1300{ 1301 unsigned long flags; 1302 bool stopped; 1303 1304 spin_lock_irqsave(&wl->wl_lock, flags); 1305 stopped = wlcore_is_queue_stopped_by_reason_locked(wl, wlvif, queue, 1306 reason); 1307 spin_unlock_irqrestore(&wl->wl_lock, flags); 1308 1309 return stopped; 1310} 1311 1312bool wlcore_is_queue_stopped_by_reason_locked(struct wl1271 *wl, 1313 struct wl12xx_vif *wlvif, u8 queue, 1314 enum wlcore_queue_stop_reason reason) 1315{ 1316 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue); 1317 1318 assert_spin_locked(&wl->wl_lock); 1319 return test_bit(reason, &wl->queue_stop_reasons[hwq]); 1320} 1321 1322bool wlcore_is_queue_stopped_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif, 1323 u8 queue) 1324{ 1325 int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue); 1326 1327 assert_spin_locked(&wl->wl_lock); 1328 return !!wl->queue_stop_reasons[hwq]; 1329} 1330