1/****************************************************************************** 2 * 3 * GPL LICENSE SUMMARY 4 * 5 * Copyright(c) 2008 - 2012 Intel Corporation. All rights reserved. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of version 2 of the GNU General Public License as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 19 * USA 20 * 21 * The full GNU General Public License is included in this distribution 22 * in the file called LICENSE.GPL. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <ilw@linux.intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 *****************************************************************************/ 29 30#include <linux/kernel.h> 31#include <linux/module.h> 32#include <linux/init.h> 33#include <linux/sched.h> 34#include <linux/ieee80211.h> 35 36#include "iwl-dev.h" 37#include "iwl-core.h" 38#include "iwl-io.h" 39#include "iwl-agn-hw.h" 40#include "iwl-agn.h" 41#include "iwl-trans.h" 42 43static void iwlagn_tx_cmd_protection(struct iwl_priv *priv, 44 struct ieee80211_tx_info *info, 45 __le16 fc, __le32 *tx_flags) 46{ 47 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS || 48 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT || 49 info->flags & IEEE80211_TX_CTL_AMPDU) 50 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; 51} 52 53/* 54 * handle build REPLY_TX command notification. 55 */ 56static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv, 57 struct sk_buff *skb, 58 struct iwl_tx_cmd *tx_cmd, 59 struct ieee80211_tx_info *info, 60 struct ieee80211_hdr *hdr, u8 sta_id) 61{ 62 __le16 fc = hdr->frame_control; 63 __le32 tx_flags = tx_cmd->tx_flags; 64 65 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 66 67 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 68 tx_flags |= TX_CMD_FLG_ACK_MSK; 69 else 70 tx_flags &= ~TX_CMD_FLG_ACK_MSK; 71 72 if (ieee80211_is_probe_resp(fc)) 73 tx_flags |= TX_CMD_FLG_TSF_MSK; 74 else if (ieee80211_is_back_req(fc)) 75 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; 76 else if (info->band == IEEE80211_BAND_2GHZ && 77 cfg(priv)->bt_params && 78 cfg(priv)->bt_params->advanced_bt_coexist && 79 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) || 80 ieee80211_is_reassoc_req(fc) || 81 skb->protocol == cpu_to_be16(ETH_P_PAE))) 82 tx_flags |= TX_CMD_FLG_IGNORE_BT; 83 84 85 tx_cmd->sta_id = sta_id; 86 if (ieee80211_has_morefrags(fc)) 87 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; 88 89 if (ieee80211_is_data_qos(fc)) { 90 u8 *qc = ieee80211_get_qos_ctl(hdr); 91 tx_cmd->tid_tspec = qc[0] & 0xf; 92 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; 93 } else { 94 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 95 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 96 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 97 else 98 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; 99 } 100 101 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags); 102 103 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); 104 if (ieee80211_is_mgmt(fc)) { 105 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 106 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); 107 else 108 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); 109 } else { 110 tx_cmd->timeout.pm_frame_timeout = 0; 111 } 112 113 tx_cmd->driver_txop = 0; 114 tx_cmd->tx_flags = tx_flags; 115 tx_cmd->next_frame_len = 0; 116} 117 118static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv, 119 struct iwl_tx_cmd *tx_cmd, 120 struct ieee80211_tx_info *info, 121 __le16 fc) 122{ 123 u32 rate_flags; 124 int rate_idx; 125 u8 rts_retry_limit; 126 u8 data_retry_limit; 127 u8 rate_plcp; 128 129 if (priv->wowlan) { 130 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT; 131 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT; 132 } else { 133 /* Set retry limit on RTS packets */ 134 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT; 135 136 /* Set retry limit on DATA packets and Probe Responses*/ 137 if (ieee80211_is_probe_resp(fc)) { 138 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT; 139 rts_retry_limit = 140 min(data_retry_limit, rts_retry_limit); 141 } else if (ieee80211_is_back_req(fc)) 142 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT; 143 else 144 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY; 145 } 146 147 tx_cmd->data_retry_limit = data_retry_limit; 148 tx_cmd->rts_retry_limit = rts_retry_limit; 149 150 /* DATA packets will use the uCode station table for rate/antenna 151 * selection */ 152 if (ieee80211_is_data(fc)) { 153 tx_cmd->initial_rate_index = 0; 154 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; 155#ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE 156 if (priv->tm_fixed_rate) { 157 /* 158 * rate overwrite by testmode 159 * we not only send lq command to change rate 160 * we also re-enforce per data pkt base. 161 */ 162 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK; 163 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate, 164 sizeof(tx_cmd->rate_n_flags)); 165 } 166#endif 167 return; 168 } else if (ieee80211_is_back_req(fc)) 169 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; 170 171 /** 172 * If the current TX rate stored in mac80211 has the MCS bit set, it's 173 * not really a TX rate. Thus, we use the lowest supported rate for 174 * this band. Also use the lowest supported rate if the stored rate 175 * index is invalid. 176 */ 177 rate_idx = info->control.rates[0].idx; 178 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS || 179 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY)) 180 rate_idx = rate_lowest_index(&priv->bands[info->band], 181 info->control.sta); 182 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 183 if (info->band == IEEE80211_BAND_5GHZ) 184 rate_idx += IWL_FIRST_OFDM_RATE; 185 /* Get PLCP rate for tx_cmd->rate_n_flags */ 186 rate_plcp = iwl_rates[rate_idx].plcp; 187 /* Zero out flags for this packet */ 188 rate_flags = 0; 189 190 /* Set CCK flag as needed */ 191 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 192 rate_flags |= RATE_MCS_CCK_MSK; 193 194 /* Set up antennas */ 195 if (cfg(priv)->bt_params && 196 cfg(priv)->bt_params->advanced_bt_coexist && 197 priv->bt_full_concurrent) { 198 /* operated as 1x1 in full concurrency mode */ 199 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, 200 first_antenna(hw_params(priv).valid_tx_ant)); 201 } else 202 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, 203 hw_params(priv).valid_tx_ant); 204 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant); 205 206 /* Set the rate in the TX cmd */ 207 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags); 208} 209 210static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv, 211 struct ieee80211_tx_info *info, 212 struct iwl_tx_cmd *tx_cmd, 213 struct sk_buff *skb_frag) 214{ 215 struct ieee80211_key_conf *keyconf = info->control.hw_key; 216 217 switch (keyconf->cipher) { 218 case WLAN_CIPHER_SUITE_CCMP: 219 tx_cmd->sec_ctl = TX_CMD_SEC_CCM; 220 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); 221 if (info->flags & IEEE80211_TX_CTL_AMPDU) 222 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; 223 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n"); 224 break; 225 226 case WLAN_CIPHER_SUITE_TKIP: 227 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 228 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 229 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n"); 230 break; 231 232 case WLAN_CIPHER_SUITE_WEP104: 233 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 234 /* fall through */ 235 case WLAN_CIPHER_SUITE_WEP40: 236 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP | 237 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT); 238 239 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 240 241 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " 242 "with key %d\n", keyconf->keyidx); 243 break; 244 245 default: 246 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher); 247 break; 248 } 249} 250 251/** 252 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta 253 * @context: the current context 254 * @sta: mac80211 station 255 * 256 * In certain circumstances mac80211 passes a station pointer 257 * that may be %NULL, for example during TX or key setup. In 258 * that case, we need to use the broadcast station, so this 259 * inline wraps that pattern. 260 */ 261static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context, 262 struct ieee80211_sta *sta) 263{ 264 int sta_id; 265 266 if (!sta) 267 return context->bcast_sta_id; 268 269 sta_id = iwl_sta_id(sta); 270 271 /* 272 * mac80211 should not be passing a partially 273 * initialised station! 274 */ 275 WARN_ON(sta_id == IWL_INVALID_STATION); 276 277 return sta_id; 278} 279 280/* 281 * start REPLY_TX command process 282 */ 283int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) 284{ 285 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 286 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 287 struct iwl_station_priv *sta_priv = NULL; 288 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 289 struct iwl_device_cmd *dev_cmd = NULL; 290 struct iwl_tx_cmd *tx_cmd; 291 __le16 fc; 292 u8 hdr_len; 293 u16 len, seq_number = 0; 294 u8 sta_id, tid = IWL_MAX_TID_COUNT; 295 bool is_agg = false; 296 297 if (info->control.vif) 298 ctx = iwl_rxon_ctx_from_vif(info->control.vif); 299 300 if (iwl_is_rfkill(priv)) { 301 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); 302 goto drop_unlock_priv; 303 } 304 305 fc = hdr->frame_control; 306 307#ifdef CONFIG_IWLWIFI_DEBUG 308 if (ieee80211_is_auth(fc)) 309 IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); 310 else if (ieee80211_is_assoc_req(fc)) 311 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); 312 else if (ieee80211_is_reassoc_req(fc)) 313 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); 314#endif 315 316 if (unlikely(ieee80211_is_probe_resp(fc))) { 317 struct iwl_wipan_noa_data *noa_data = 318 rcu_dereference(priv->noa_data); 319 320 if (noa_data && 321 pskb_expand_head(skb, 0, noa_data->length, 322 GFP_ATOMIC) == 0) { 323 memcpy(skb_put(skb, noa_data->length), 324 noa_data->data, noa_data->length); 325 hdr = (struct ieee80211_hdr *)skb->data; 326 } 327 } 328 329 hdr_len = ieee80211_hdrlen(fc); 330 331 /* For management frames use broadcast id to do not break aggregation */ 332 if (!ieee80211_is_data(fc)) 333 sta_id = ctx->bcast_sta_id; 334 else { 335 /* Find index into station table for destination station */ 336 sta_id = iwl_sta_id_or_broadcast(ctx, info->control.sta); 337 if (sta_id == IWL_INVALID_STATION) { 338 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", 339 hdr->addr1); 340 goto drop_unlock_priv; 341 } 342 } 343 344 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id); 345 346 if (info->control.sta) 347 sta_priv = (void *)info->control.sta->drv_priv; 348 349 if (sta_priv && sta_priv->asleep && 350 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) { 351 /* 352 * This sends an asynchronous command to the device, 353 * but we can rely on it being processed before the 354 * next frame is processed -- and the next frame to 355 * this station is the one that will consume this 356 * counter. 357 * For now set the counter to just 1 since we do not 358 * support uAPSD yet. 359 * 360 * FIXME: If we get two non-bufferable frames one 361 * after the other, we might only send out one of 362 * them because this is racy. 363 */ 364 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1); 365 } 366 367 if (info->flags & IEEE80211_TX_CTL_AMPDU) 368 is_agg = true; 369 370 dev_cmd = kmem_cache_alloc(iwl_tx_cmd_pool, GFP_ATOMIC); 371 372 if (unlikely(!dev_cmd)) 373 goto drop_unlock_priv; 374 375 memset(dev_cmd, 0, sizeof(*dev_cmd)); 376 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload; 377 378 /* Total # bytes to be transmitted */ 379 len = (u16)skb->len; 380 tx_cmd->len = cpu_to_le16(len); 381 382 if (info->control.hw_key) 383 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb); 384 385 /* TODO need this for burst mode later on */ 386 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id); 387 iwl_dbg_log_tx_data_frame(priv, len, hdr); 388 389 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc); 390 391 iwl_update_stats(priv, true, fc, len); 392 393 memset(&info->status, 0, sizeof(info->status)); 394 395 info->driver_data[0] = ctx; 396 info->driver_data[1] = dev_cmd; 397 398 spin_lock(&priv->sta_lock); 399 400 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 401 u8 *qc = NULL; 402 struct iwl_tid_data *tid_data; 403 qc = ieee80211_get_qos_ctl(hdr); 404 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 405 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 406 goto drop_unlock_sta; 407 tid_data = &priv->tid_data[sta_id][tid]; 408 409 /* aggregation is on for this <sta,tid> */ 410 if (info->flags & IEEE80211_TX_CTL_AMPDU && 411 tid_data->agg.state != IWL_AGG_ON) { 412 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:" 413 " Tx flags = 0x%08x, agg.state = %d", 414 info->flags, tid_data->agg.state); 415 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d", 416 sta_id, tid, SEQ_TO_SN(tid_data->seq_number)); 417 goto drop_unlock_sta; 418 } 419 420 /* We can receive packets from the stack in IWL_AGG_{ON,OFF} 421 * only. Check this here. 422 */ 423 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON && 424 tid_data->agg.state != IWL_AGG_OFF, 425 "Tx while agg.state = %d", tid_data->agg.state)) 426 goto drop_unlock_sta; 427 428 seq_number = tid_data->seq_number; 429 seq_number &= IEEE80211_SCTL_SEQ; 430 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 431 hdr->seq_ctrl |= cpu_to_le16(seq_number); 432 seq_number += 0x10; 433 } 434 435 /* Copy MAC header from skb into command buffer */ 436 memcpy(tx_cmd->hdr, hdr, hdr_len); 437 438 if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id, tid)) 439 goto drop_unlock_sta; 440 441 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc) && 442 !ieee80211_has_morefrags(fc)) 443 priv->tid_data[sta_id][tid].seq_number = seq_number; 444 445 spin_unlock(&priv->sta_lock); 446 447 /* 448 * Avoid atomic ops if it isn't an associated client. 449 * Also, if this is a packet for aggregation, don't 450 * increase the counter because the ucode will stop 451 * aggregation queues when their respective station 452 * goes to sleep. 453 */ 454 if (sta_priv && sta_priv->client && !is_agg) 455 atomic_inc(&sta_priv->pending_frames); 456 457 return 0; 458 459drop_unlock_sta: 460 if (dev_cmd) 461 kmem_cache_free(iwl_tx_cmd_pool, dev_cmd); 462 spin_unlock(&priv->sta_lock); 463drop_unlock_priv: 464 return -1; 465} 466 467int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif, 468 struct ieee80211_sta *sta, u16 tid) 469{ 470 struct iwl_tid_data *tid_data; 471 int sta_id; 472 473 sta_id = iwl_sta_id(sta); 474 475 if (sta_id == IWL_INVALID_STATION) { 476 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); 477 return -ENXIO; 478 } 479 480 spin_lock_bh(&priv->sta_lock); 481 482 tid_data = &priv->tid_data[sta_id][tid]; 483 484 switch (priv->tid_data[sta_id][tid].agg.state) { 485 case IWL_EMPTYING_HW_QUEUE_ADDBA: 486 /* 487 * This can happen if the peer stops aggregation 488 * again before we've had a chance to drain the 489 * queue we selected previously, i.e. before the 490 * session was really started completely. 491 */ 492 IWL_DEBUG_HT(priv, "AGG stop before setup done\n"); 493 goto turn_off; 494 case IWL_AGG_ON: 495 break; 496 default: 497 IWL_WARN(priv, "Stopping AGG while state not ON " 498 "or starting for %d on %d (%d)\n", sta_id, tid, 499 priv->tid_data[sta_id][tid].agg.state); 500 spin_unlock_bh(&priv->sta_lock); 501 return 0; 502 } 503 504 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number); 505 506 /* There are still packets for this RA / TID in the HW */ 507 if (tid_data->agg.ssn != tid_data->next_reclaimed) { 508 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, " 509 "next_recl = %d", 510 tid_data->agg.ssn, 511 tid_data->next_reclaimed); 512 priv->tid_data[sta_id][tid].agg.state = 513 IWL_EMPTYING_HW_QUEUE_DELBA; 514 spin_unlock_bh(&priv->sta_lock); 515 return 0; 516 } 517 518 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d", 519 tid_data->agg.ssn); 520turn_off: 521 priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF; 522 523 spin_unlock_bh(&priv->sta_lock); 524 525 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid); 526 527 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 528 529 return 0; 530} 531 532int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif, 533 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 534{ 535 struct iwl_tid_data *tid_data; 536 int sta_id; 537 int ret; 538 539 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n", 540 sta->addr, tid); 541 542 sta_id = iwl_sta_id(sta); 543 if (sta_id == IWL_INVALID_STATION) { 544 IWL_ERR(priv, "Start AGG on invalid station\n"); 545 return -ENXIO; 546 } 547 if (unlikely(tid >= IWL_MAX_TID_COUNT)) 548 return -EINVAL; 549 550 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) { 551 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); 552 return -ENXIO; 553 } 554 555 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); 556 if (ret) 557 return ret; 558 559 spin_lock_bh(&priv->sta_lock); 560 561 tid_data = &priv->tid_data[sta_id][tid]; 562 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number); 563 564 *ssn = tid_data->agg.ssn; 565 566 ret = iwl_trans_tx_agg_alloc(trans(priv), sta_id, tid); 567 if (ret) { 568 spin_unlock_bh(&priv->sta_lock); 569 return ret; 570 } 571 572 if (*ssn == tid_data->next_reclaimed) { 573 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d", 574 tid_data->agg.ssn); 575 tid_data->agg.state = IWL_AGG_ON; 576 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 577 } else { 578 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, " 579 "next_reclaimed = %d", 580 tid_data->agg.ssn, 581 tid_data->next_reclaimed); 582 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; 583 } 584 585 spin_unlock_bh(&priv->sta_lock); 586 587 return ret; 588} 589 590int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif, 591 struct ieee80211_sta *sta, u16 tid, u8 buf_size) 592{ 593 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 594 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 595 u16 ssn; 596 597 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 598 599 spin_lock_bh(&priv->sta_lock); 600 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn; 601 spin_unlock_bh(&priv->sta_lock); 602 603 iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, sta_priv->sta_id, tid, 604 buf_size, ssn); 605 606 /* 607 * If the limit is 0, then it wasn't initialised yet, 608 * use the default. We can do that since we take the 609 * minimum below, and we don't want to go above our 610 * default due to hardware restrictions. 611 */ 612 if (sta_priv->max_agg_bufsize == 0) 613 sta_priv->max_agg_bufsize = 614 LINK_QUAL_AGG_FRAME_LIMIT_DEF; 615 616 /* 617 * Even though in theory the peer could have different 618 * aggregation reorder buffer sizes for different sessions, 619 * our ucode doesn't allow for that and has a global limit 620 * for each station. Therefore, use the minimum of all the 621 * aggregation sessions and our default value. 622 */ 623 sta_priv->max_agg_bufsize = 624 min(sta_priv->max_agg_bufsize, buf_size); 625 626 if (hw_params(priv).use_rts_for_aggregation) { 627 /* 628 * switch to RTS/CTS if it is the prefer protection 629 * method for HT traffic 630 */ 631 632 sta_priv->lq_sta.lq.general_params.flags |= 633 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 634 } 635 priv->agg_tids_count++; 636 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 637 priv->agg_tids_count); 638 639 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit = 640 sta_priv->max_agg_bufsize; 641 642 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n", 643 sta->addr, tid); 644 645 return iwl_send_lq_cmd(priv, ctx, 646 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 647} 648 649static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid) 650{ 651 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid]; 652 enum iwl_rxon_context_id ctx; 653 struct ieee80211_vif *vif; 654 u8 *addr; 655 656 lockdep_assert_held(&priv->sta_lock); 657 658 addr = priv->stations[sta_id].sta.sta.addr; 659 ctx = priv->stations[sta_id].ctxid; 660 vif = priv->contexts[ctx].vif; 661 662 switch (priv->tid_data[sta_id][tid].agg.state) { 663 case IWL_EMPTYING_HW_QUEUE_DELBA: 664 /* There are no packets for this RA / TID in the HW any more */ 665 if (tid_data->agg.ssn == tid_data->next_reclaimed) { 666 IWL_DEBUG_TX_QUEUES(priv, 667 "Can continue DELBA flow ssn = next_recl =" 668 " %d", tid_data->next_reclaimed); 669 iwl_trans_tx_agg_disable(trans(priv), sta_id, tid); 670 tid_data->agg.state = IWL_AGG_OFF; 671 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid); 672 } 673 break; 674 case IWL_EMPTYING_HW_QUEUE_ADDBA: 675 /* There are no packets for this RA / TID in the HW any more */ 676 if (tid_data->agg.ssn == tid_data->next_reclaimed) { 677 IWL_DEBUG_TX_QUEUES(priv, 678 "Can continue ADDBA flow ssn = next_recl =" 679 " %d", tid_data->next_reclaimed); 680 tid_data->agg.state = IWL_AGG_ON; 681 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid); 682 } 683 break; 684 default: 685 break; 686 } 687} 688 689static void iwlagn_non_agg_tx_status(struct iwl_priv *priv, 690 struct iwl_rxon_context *ctx, 691 const u8 *addr1) 692{ 693 struct ieee80211_sta *sta; 694 struct iwl_station_priv *sta_priv; 695 696 rcu_read_lock(); 697 sta = ieee80211_find_sta(ctx->vif, addr1); 698 if (sta) { 699 sta_priv = (void *)sta->drv_priv; 700 /* avoid atomic ops if this isn't a client */ 701 if (sta_priv->client && 702 atomic_dec_return(&sta_priv->pending_frames) == 0) 703 ieee80211_sta_block_awake(priv->hw, sta, false); 704 } 705 rcu_read_unlock(); 706} 707 708/** 709 * translate ucode response to mac80211 tx status control values 710 */ 711static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags, 712 struct ieee80211_tx_info *info) 713{ 714 struct ieee80211_tx_rate *r = &info->control.rates[0]; 715 716 info->antenna_sel_tx = 717 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 718 if (rate_n_flags & RATE_MCS_HT_MSK) 719 r->flags |= IEEE80211_TX_RC_MCS; 720 if (rate_n_flags & RATE_MCS_GF_MSK) 721 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 722 if (rate_n_flags & RATE_MCS_HT40_MSK) 723 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 724 if (rate_n_flags & RATE_MCS_DUP_MSK) 725 r->flags |= IEEE80211_TX_RC_DUP_DATA; 726 if (rate_n_flags & RATE_MCS_SGI_MSK) 727 r->flags |= IEEE80211_TX_RC_SHORT_GI; 728 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band); 729} 730 731#ifdef CONFIG_IWLWIFI_DEBUG 732const char *iwl_get_tx_fail_reason(u32 status) 733{ 734#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 735#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 736 737 switch (status & TX_STATUS_MSK) { 738 case TX_STATUS_SUCCESS: 739 return "SUCCESS"; 740 TX_STATUS_POSTPONE(DELAY); 741 TX_STATUS_POSTPONE(FEW_BYTES); 742 TX_STATUS_POSTPONE(BT_PRIO); 743 TX_STATUS_POSTPONE(QUIET_PERIOD); 744 TX_STATUS_POSTPONE(CALC_TTAK); 745 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 746 TX_STATUS_FAIL(SHORT_LIMIT); 747 TX_STATUS_FAIL(LONG_LIMIT); 748 TX_STATUS_FAIL(FIFO_UNDERRUN); 749 TX_STATUS_FAIL(DRAIN_FLOW); 750 TX_STATUS_FAIL(RFKILL_FLUSH); 751 TX_STATUS_FAIL(LIFE_EXPIRE); 752 TX_STATUS_FAIL(DEST_PS); 753 TX_STATUS_FAIL(HOST_ABORTED); 754 TX_STATUS_FAIL(BT_RETRY); 755 TX_STATUS_FAIL(STA_INVALID); 756 TX_STATUS_FAIL(FRAG_DROPPED); 757 TX_STATUS_FAIL(TID_DISABLE); 758 TX_STATUS_FAIL(FIFO_FLUSHED); 759 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); 760 TX_STATUS_FAIL(PASSIVE_NO_RX); 761 TX_STATUS_FAIL(NO_BEACON_ON_RADAR); 762 } 763 764 return "UNKNOWN"; 765 766#undef TX_STATUS_FAIL 767#undef TX_STATUS_POSTPONE 768} 769#endif /* CONFIG_IWLWIFI_DEBUG */ 770 771static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status) 772{ 773 status &= AGG_TX_STATUS_MSK; 774 775 switch (status) { 776 case AGG_TX_STATE_UNDERRUN_MSK: 777 priv->reply_agg_tx_stats.underrun++; 778 break; 779 case AGG_TX_STATE_BT_PRIO_MSK: 780 priv->reply_agg_tx_stats.bt_prio++; 781 break; 782 case AGG_TX_STATE_FEW_BYTES_MSK: 783 priv->reply_agg_tx_stats.few_bytes++; 784 break; 785 case AGG_TX_STATE_ABORT_MSK: 786 priv->reply_agg_tx_stats.abort++; 787 break; 788 case AGG_TX_STATE_LAST_SENT_TTL_MSK: 789 priv->reply_agg_tx_stats.last_sent_ttl++; 790 break; 791 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK: 792 priv->reply_agg_tx_stats.last_sent_try++; 793 break; 794 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK: 795 priv->reply_agg_tx_stats.last_sent_bt_kill++; 796 break; 797 case AGG_TX_STATE_SCD_QUERY_MSK: 798 priv->reply_agg_tx_stats.scd_query++; 799 break; 800 case AGG_TX_STATE_TEST_BAD_CRC32_MSK: 801 priv->reply_agg_tx_stats.bad_crc32++; 802 break; 803 case AGG_TX_STATE_RESPONSE_MSK: 804 priv->reply_agg_tx_stats.response++; 805 break; 806 case AGG_TX_STATE_DUMP_TX_MSK: 807 priv->reply_agg_tx_stats.dump_tx++; 808 break; 809 case AGG_TX_STATE_DELAY_TX_MSK: 810 priv->reply_agg_tx_stats.delay_tx++; 811 break; 812 default: 813 priv->reply_agg_tx_stats.unknown++; 814 break; 815 } 816} 817 818static void iwl_rx_reply_tx_agg(struct iwl_priv *priv, 819 struct iwlagn_tx_resp *tx_resp) 820{ 821 struct agg_tx_status *frame_status = &tx_resp->status; 822 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> 823 IWLAGN_TX_RES_TID_POS; 824 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> 825 IWLAGN_TX_RES_RA_POS; 826 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg; 827 u32 status = le16_to_cpu(tx_resp->status.status); 828 int i; 829 830 WARN_ON(tid == IWL_TID_NON_QOS); 831 832 if (agg->wait_for_ba) 833 IWL_DEBUG_TX_REPLY(priv, 834 "got tx response w/o block-ack\n"); 835 836 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); 837 agg->wait_for_ba = (tx_resp->frame_count > 1); 838 839 /* 840 * If the BT kill count is non-zero, we'll get this 841 * notification again. 842 */ 843 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 && 844 cfg(priv)->bt_params && 845 cfg(priv)->bt_params->advanced_bt_coexist) { 846 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n"); 847 } 848 849 if (tx_resp->frame_count == 1) 850 return; 851 852 /* Construct bit-map of pending frames within Tx window */ 853 for (i = 0; i < tx_resp->frame_count; i++) { 854 u16 fstatus = le16_to_cpu(frame_status[i].status); 855 856 if (status & AGG_TX_STATUS_MSK) 857 iwlagn_count_agg_tx_err_status(priv, fstatus); 858 859 if (status & (AGG_TX_STATE_FEW_BYTES_MSK | 860 AGG_TX_STATE_ABORT_MSK)) 861 continue; 862 863 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), " 864 "try-count (0x%08x)\n", 865 iwl_get_agg_tx_fail_reason(fstatus), 866 fstatus & AGG_TX_STATUS_MSK, 867 fstatus & AGG_TX_TRY_MSK); 868 } 869} 870 871#ifdef CONFIG_IWLWIFI_DEBUG 872#define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x 873 874const char *iwl_get_agg_tx_fail_reason(u16 status) 875{ 876 status &= AGG_TX_STATUS_MSK; 877 switch (status) { 878 case AGG_TX_STATE_TRANSMITTED: 879 return "SUCCESS"; 880 AGG_TX_STATE_FAIL(UNDERRUN_MSK); 881 AGG_TX_STATE_FAIL(BT_PRIO_MSK); 882 AGG_TX_STATE_FAIL(FEW_BYTES_MSK); 883 AGG_TX_STATE_FAIL(ABORT_MSK); 884 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK); 885 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK); 886 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK); 887 AGG_TX_STATE_FAIL(SCD_QUERY_MSK); 888 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK); 889 AGG_TX_STATE_FAIL(RESPONSE_MSK); 890 AGG_TX_STATE_FAIL(DUMP_TX_MSK); 891 AGG_TX_STATE_FAIL(DELAY_TX_MSK); 892 } 893 894 return "UNKNOWN"; 895} 896#endif /* CONFIG_IWLWIFI_DEBUG */ 897 898static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp) 899{ 900 return le32_to_cpup((__le32 *)&tx_resp->status + 901 tx_resp->frame_count) & MAX_SN; 902} 903 904static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status) 905{ 906 status &= TX_STATUS_MSK; 907 908 switch (status) { 909 case TX_STATUS_POSTPONE_DELAY: 910 priv->reply_tx_stats.pp_delay++; 911 break; 912 case TX_STATUS_POSTPONE_FEW_BYTES: 913 priv->reply_tx_stats.pp_few_bytes++; 914 break; 915 case TX_STATUS_POSTPONE_BT_PRIO: 916 priv->reply_tx_stats.pp_bt_prio++; 917 break; 918 case TX_STATUS_POSTPONE_QUIET_PERIOD: 919 priv->reply_tx_stats.pp_quiet_period++; 920 break; 921 case TX_STATUS_POSTPONE_CALC_TTAK: 922 priv->reply_tx_stats.pp_calc_ttak++; 923 break; 924 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY: 925 priv->reply_tx_stats.int_crossed_retry++; 926 break; 927 case TX_STATUS_FAIL_SHORT_LIMIT: 928 priv->reply_tx_stats.short_limit++; 929 break; 930 case TX_STATUS_FAIL_LONG_LIMIT: 931 priv->reply_tx_stats.long_limit++; 932 break; 933 case TX_STATUS_FAIL_FIFO_UNDERRUN: 934 priv->reply_tx_stats.fifo_underrun++; 935 break; 936 case TX_STATUS_FAIL_DRAIN_FLOW: 937 priv->reply_tx_stats.drain_flow++; 938 break; 939 case TX_STATUS_FAIL_RFKILL_FLUSH: 940 priv->reply_tx_stats.rfkill_flush++; 941 break; 942 case TX_STATUS_FAIL_LIFE_EXPIRE: 943 priv->reply_tx_stats.life_expire++; 944 break; 945 case TX_STATUS_FAIL_DEST_PS: 946 priv->reply_tx_stats.dest_ps++; 947 break; 948 case TX_STATUS_FAIL_HOST_ABORTED: 949 priv->reply_tx_stats.host_abort++; 950 break; 951 case TX_STATUS_FAIL_BT_RETRY: 952 priv->reply_tx_stats.bt_retry++; 953 break; 954 case TX_STATUS_FAIL_STA_INVALID: 955 priv->reply_tx_stats.sta_invalid++; 956 break; 957 case TX_STATUS_FAIL_FRAG_DROPPED: 958 priv->reply_tx_stats.frag_drop++; 959 break; 960 case TX_STATUS_FAIL_TID_DISABLE: 961 priv->reply_tx_stats.tid_disable++; 962 break; 963 case TX_STATUS_FAIL_FIFO_FLUSHED: 964 priv->reply_tx_stats.fifo_flush++; 965 break; 966 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL: 967 priv->reply_tx_stats.insuff_cf_poll++; 968 break; 969 case TX_STATUS_FAIL_PASSIVE_NO_RX: 970 priv->reply_tx_stats.fail_hw_drop++; 971 break; 972 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR: 973 priv->reply_tx_stats.sta_color_mismatch++; 974 break; 975 default: 976 priv->reply_tx_stats.unknown++; 977 break; 978 } 979} 980 981static void iwlagn_set_tx_status(struct iwl_priv *priv, 982 struct ieee80211_tx_info *info, 983 struct iwlagn_tx_resp *tx_resp, 984 bool is_agg) 985{ 986 u16 status = le16_to_cpu(tx_resp->status.status); 987 988 info->status.rates[0].count = tx_resp->failure_frame + 1; 989 if (is_agg) 990 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 991 info->flags |= iwl_tx_status_to_mac80211(status); 992 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags), 993 info); 994 if (!iwl_is_tx_success(status)) 995 iwlagn_count_tx_err_status(priv, status); 996} 997 998static void iwl_check_abort_status(struct iwl_priv *priv, 999 u8 frame_count, u32 status) 1000{ 1001 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { 1002 IWL_ERR(priv, "Tx flush command to flush out all frames\n"); 1003 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) 1004 queue_work(priv->workqueue, &priv->tx_flush); 1005 } 1006} 1007 1008int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb, 1009 struct iwl_device_cmd *cmd) 1010{ 1011 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1012 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1013 int txq_id = SEQ_TO_QUEUE(sequence); 1014 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence); 1015 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data; 1016 struct ieee80211_hdr *hdr; 1017 u32 status = le16_to_cpu(tx_resp->status.status); 1018 u16 ssn = iwlagn_get_scd_ssn(tx_resp); 1019 int tid; 1020 int sta_id; 1021 int freed; 1022 struct ieee80211_tx_info *info; 1023 struct sk_buff_head skbs; 1024 struct sk_buff *skb; 1025 struct iwl_rxon_context *ctx; 1026 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE); 1027 1028 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> 1029 IWLAGN_TX_RES_TID_POS; 1030 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> 1031 IWLAGN_TX_RES_RA_POS; 1032 1033 spin_lock(&priv->sta_lock); 1034 1035 if (is_agg) 1036 iwl_rx_reply_tx_agg(priv, tx_resp); 1037 1038 __skb_queue_head_init(&skbs); 1039 1040 if (tx_resp->frame_count == 1) { 1041 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl); 1042 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10); 1043 1044 if (is_agg) { 1045 /* If this is an aggregation queue, we can rely on the 1046 * ssn since the wifi sequence number corresponds to 1047 * the index in the TFD ring (%256). 1048 * The seq_ctl is the sequence control of the packet 1049 * to which this Tx response relates. But if there is a 1050 * hole in the bitmap of the BA we received, this Tx 1051 * response may allow to reclaim the hole and all the 1052 * subsequent packets that were already acked. 1053 * In that case, seq_ctl != ssn, and the next packet 1054 * to be reclaimed will be ssn and not seq_ctl. 1055 */ 1056 next_reclaimed = ssn; 1057 } 1058 1059 if (tid != IWL_TID_NON_QOS) { 1060 priv->tid_data[sta_id][tid].next_reclaimed = 1061 next_reclaimed; 1062 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d", 1063 next_reclaimed); 1064 } 1065 1066 /*we can free until ssn % q.n_bd not inclusive */ 1067 WARN_ON(iwl_trans_reclaim(trans(priv), sta_id, tid, 1068 txq_id, ssn, &skbs)); 1069 iwlagn_check_ratid_empty(priv, sta_id, tid); 1070 freed = 0; 1071 1072 /* process frames */ 1073 skb_queue_walk(&skbs, skb) { 1074 hdr = (struct ieee80211_hdr *)skb->data; 1075 1076 if (!ieee80211_is_data_qos(hdr->frame_control)) 1077 priv->last_seq_ctl = tx_resp->seq_ctl; 1078 1079 info = IEEE80211_SKB_CB(skb); 1080 ctx = info->driver_data[0]; 1081 kmem_cache_free(iwl_tx_cmd_pool, 1082 (info->driver_data[1])); 1083 1084 memset(&info->status, 0, sizeof(info->status)); 1085 1086 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX && 1087 iwl_is_associated_ctx(ctx) && ctx->vif && 1088 ctx->vif->type == NL80211_IFTYPE_STATION) { 1089 /* block and stop all queues */ 1090 priv->passive_no_rx = true; 1091 IWL_DEBUG_TX_QUEUES(priv, "stop all queues: " 1092 "passive channel"); 1093 ieee80211_stop_queues(priv->hw); 1094 1095 IWL_DEBUG_TX_REPLY(priv, 1096 "TXQ %d status %s (0x%08x) " 1097 "rate_n_flags 0x%x retries %d\n", 1098 txq_id, 1099 iwl_get_tx_fail_reason(status), 1100 status, 1101 le32_to_cpu(tx_resp->rate_n_flags), 1102 tx_resp->failure_frame); 1103 1104 IWL_DEBUG_TX_REPLY(priv, 1105 "FrameCnt = %d, idx=%d\n", 1106 tx_resp->frame_count, cmd_index); 1107 } 1108 1109 /* check if BAR is needed */ 1110 if (is_agg && !iwl_is_tx_success(status)) 1111 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1112 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb), 1113 tx_resp, is_agg); 1114 if (!is_agg) 1115 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1); 1116 1117 freed++; 1118 } 1119 1120 WARN_ON(!is_agg && freed != 1); 1121 } 1122 1123 iwl_check_abort_status(priv, tx_resp->frame_count, status); 1124 spin_unlock(&priv->sta_lock); 1125 1126 while (!skb_queue_empty(&skbs)) { 1127 skb = __skb_dequeue(&skbs); 1128 ieee80211_tx_status(priv->hw, skb); 1129 } 1130 1131 return 0; 1132} 1133 1134/** 1135 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA 1136 * 1137 * Handles block-acknowledge notification from device, which reports success 1138 * of frames sent via aggregation. 1139 */ 1140int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv, 1141 struct iwl_rx_cmd_buffer *rxb, 1142 struct iwl_device_cmd *cmd) 1143{ 1144 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1145 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data; 1146 struct iwl_ht_agg *agg; 1147 struct sk_buff_head reclaimed_skbs; 1148 struct ieee80211_tx_info *info; 1149 struct ieee80211_hdr *hdr; 1150 struct sk_buff *skb; 1151 int sta_id; 1152 int tid; 1153 int freed; 1154 1155 /* "flow" corresponds to Tx queue */ 1156 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 1157 1158 /* "ssn" is start of block-ack Tx window, corresponds to index 1159 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1160 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); 1161 1162 if (scd_flow >= cfg(priv)->base_params->num_of_queues) { 1163 IWL_ERR(priv, 1164 "BUG_ON scd_flow is bigger than number of queues\n"); 1165 return 0; 1166 } 1167 1168 sta_id = ba_resp->sta_id; 1169 tid = ba_resp->tid; 1170 agg = &priv->tid_data[sta_id][tid].agg; 1171 1172 spin_lock(&priv->sta_lock); 1173 1174 if (unlikely(!agg->wait_for_ba)) { 1175 if (unlikely(ba_resp->bitmap)) 1176 IWL_ERR(priv, "Received BA when not expected\n"); 1177 spin_unlock(&priv->sta_lock); 1178 return 0; 1179 } 1180 1181 __skb_queue_head_init(&reclaimed_skbs); 1182 1183 /* Release all TFDs before the SSN, i.e. all TFDs in front of 1184 * block-ack window (we assume that they've been successfully 1185 * transmitted ... if not, it's too late anyway). */ 1186 if (iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, 1187 ba_resp_scd_ssn, &reclaimed_skbs)) { 1188 spin_unlock(&priv->sta_lock); 1189 return 0; 1190 } 1191 1192 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " 1193 "sta_id = %d\n", 1194 agg->wait_for_ba, 1195 (u8 *) &ba_resp->sta_addr_lo32, 1196 ba_resp->sta_id); 1197 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, " 1198 "scd_flow = %d, scd_ssn = %d\n", 1199 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl), 1200 (unsigned long long)le64_to_cpu(ba_resp->bitmap), 1201 scd_flow, ba_resp_scd_ssn); 1202 1203 /* Mark that the expected block-ack response arrived */ 1204 agg->wait_for_ba = false; 1205 1206 /* Sanity check values reported by uCode */ 1207 if (ba_resp->txed_2_done > ba_resp->txed) { 1208 IWL_DEBUG_TX_REPLY(priv, 1209 "bogus sent(%d) and ack(%d) count\n", 1210 ba_resp->txed, ba_resp->txed_2_done); 1211 /* 1212 * set txed_2_done = txed, 1213 * so it won't impact rate scale 1214 */ 1215 ba_resp->txed = ba_resp->txed_2_done; 1216 } 1217 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n", 1218 ba_resp->txed, ba_resp->txed_2_done); 1219 1220 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn; 1221 1222 iwlagn_check_ratid_empty(priv, sta_id, tid); 1223 freed = 0; 1224 1225 skb_queue_walk(&reclaimed_skbs, skb) { 1226 hdr = (struct ieee80211_hdr *)skb->data; 1227 1228 if (ieee80211_is_data_qos(hdr->frame_control)) 1229 freed++; 1230 else 1231 WARN_ON_ONCE(1); 1232 1233 info = IEEE80211_SKB_CB(skb); 1234 kmem_cache_free(iwl_tx_cmd_pool, (info->driver_data[1])); 1235 1236 if (freed == 1) { 1237 /* this is the first skb we deliver in this batch */ 1238 /* put the rate scaling data there */ 1239 info = IEEE80211_SKB_CB(skb); 1240 memset(&info->status, 0, sizeof(info->status)); 1241 info->flags |= IEEE80211_TX_STAT_ACK; 1242 info->flags |= IEEE80211_TX_STAT_AMPDU; 1243 info->status.ampdu_ack_len = ba_resp->txed_2_done; 1244 info->status.ampdu_len = ba_resp->txed; 1245 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags, 1246 info); 1247 } 1248 } 1249 1250 spin_unlock(&priv->sta_lock); 1251 1252 while (!skb_queue_empty(&reclaimed_skbs)) { 1253 skb = __skb_dequeue(&reclaimed_skbs); 1254 ieee80211_tx_status(priv->hw, skb); 1255 } 1256 1257 return 0; 1258} 1259