1/****************************************************************************** 2 * 3 * GPL LICENSE SUMMARY 4 * 5 * Copyright(c) 2008 - 2014 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 COPYING. 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/sched.h> 33#include <linux/ieee80211.h> 34#include "iwl-io.h" 35#include "iwl-trans.h" 36#include "iwl-agn-hw.h" 37#include "dev.h" 38#include "agn.h" 39 40static const u8 tid_to_ac[] = { 41 IEEE80211_AC_BE, 42 IEEE80211_AC_BK, 43 IEEE80211_AC_BK, 44 IEEE80211_AC_BE, 45 IEEE80211_AC_VI, 46 IEEE80211_AC_VI, 47 IEEE80211_AC_VO, 48 IEEE80211_AC_VO, 49}; 50 51static void iwlagn_tx_cmd_protection(struct iwl_priv *priv, 52 struct ieee80211_tx_info *info, 53 __le16 fc, __le32 *tx_flags) 54{ 55 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS || 56 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT || 57 info->flags & IEEE80211_TX_CTL_AMPDU) 58 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; 59} 60 61/* 62 * handle build REPLY_TX command notification. 63 */ 64static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv, 65 struct sk_buff *skb, 66 struct iwl_tx_cmd *tx_cmd, 67 struct ieee80211_tx_info *info, 68 struct ieee80211_hdr *hdr, u8 sta_id) 69{ 70 __le16 fc = hdr->frame_control; 71 __le32 tx_flags = tx_cmd->tx_flags; 72 73 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 74 75 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 76 tx_flags |= TX_CMD_FLG_ACK_MSK; 77 else 78 tx_flags &= ~TX_CMD_FLG_ACK_MSK; 79 80 if (ieee80211_is_probe_resp(fc)) 81 tx_flags |= TX_CMD_FLG_TSF_MSK; 82 else if (ieee80211_is_back_req(fc)) 83 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; 84 else if (info->band == IEEE80211_BAND_2GHZ && 85 priv->lib->bt_params && 86 priv->lib->bt_params->advanced_bt_coexist && 87 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) || 88 ieee80211_is_reassoc_req(fc) || 89 info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO)) 90 tx_flags |= TX_CMD_FLG_IGNORE_BT; 91 92 93 tx_cmd->sta_id = sta_id; 94 if (ieee80211_has_morefrags(fc)) 95 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; 96 97 if (ieee80211_is_data_qos(fc)) { 98 u8 *qc = ieee80211_get_qos_ctl(hdr); 99 tx_cmd->tid_tspec = qc[0] & 0xf; 100 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; 101 } else { 102 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 103 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 104 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 105 else 106 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; 107 } 108 109 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags); 110 111 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); 112 if (ieee80211_is_mgmt(fc)) { 113 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 114 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); 115 else 116 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); 117 } else { 118 tx_cmd->timeout.pm_frame_timeout = 0; 119 } 120 121 tx_cmd->driver_txop = 0; 122 tx_cmd->tx_flags = tx_flags; 123 tx_cmd->next_frame_len = 0; 124} 125 126static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv, 127 struct iwl_tx_cmd *tx_cmd, 128 struct ieee80211_tx_info *info, 129 struct ieee80211_sta *sta, 130 __le16 fc) 131{ 132 u32 rate_flags; 133 int rate_idx; 134 u8 rts_retry_limit; 135 u8 data_retry_limit; 136 u8 rate_plcp; 137 138 if (priv->wowlan) { 139 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT; 140 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT; 141 } else { 142 /* Set retry limit on RTS packets */ 143 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT; 144 145 /* Set retry limit on DATA packets and Probe Responses*/ 146 if (ieee80211_is_probe_resp(fc)) { 147 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT; 148 rts_retry_limit = 149 min(data_retry_limit, rts_retry_limit); 150 } else if (ieee80211_is_back_req(fc)) 151 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT; 152 else 153 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY; 154 } 155 156 tx_cmd->data_retry_limit = data_retry_limit; 157 tx_cmd->rts_retry_limit = rts_retry_limit; 158 159 /* DATA packets will use the uCode station table for rate/antenna 160 * selection */ 161 if (ieee80211_is_data(fc)) { 162 tx_cmd->initial_rate_index = 0; 163 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; 164 return; 165 } else if (ieee80211_is_back_req(fc)) 166 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; 167 168 /** 169 * If the current TX rate stored in mac80211 has the MCS bit set, it's 170 * not really a TX rate. Thus, we use the lowest supported rate for 171 * this band. Also use the lowest supported rate if the stored rate 172 * index is invalid. 173 */ 174 rate_idx = info->control.rates[0].idx; 175 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS || 176 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY)) 177 rate_idx = rate_lowest_index( 178 &priv->nvm_data->bands[info->band], sta); 179 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 180 if (info->band == IEEE80211_BAND_5GHZ) 181 rate_idx += IWL_FIRST_OFDM_RATE; 182 /* Get PLCP rate for tx_cmd->rate_n_flags */ 183 rate_plcp = iwl_rates[rate_idx].plcp; 184 /* Zero out flags for this packet */ 185 rate_flags = 0; 186 187 /* Set CCK flag as needed */ 188 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 189 rate_flags |= RATE_MCS_CCK_MSK; 190 191 /* Set up antennas */ 192 if (priv->lib->bt_params && 193 priv->lib->bt_params->advanced_bt_coexist && 194 priv->bt_full_concurrent) { 195 /* operated as 1x1 in full concurrency mode */ 196 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, 197 first_antenna(priv->nvm_data->valid_tx_ant)); 198 } else 199 priv->mgmt_tx_ant = iwl_toggle_tx_ant( 200 priv, priv->mgmt_tx_ant, 201 priv->nvm_data->valid_tx_ant); 202 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant); 203 204 /* Set the rate in the TX cmd */ 205 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags); 206} 207 208static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv, 209 struct ieee80211_tx_info *info, 210 struct iwl_tx_cmd *tx_cmd, 211 struct sk_buff *skb_frag) 212{ 213 struct ieee80211_key_conf *keyconf = info->control.hw_key; 214 215 switch (keyconf->cipher) { 216 case WLAN_CIPHER_SUITE_CCMP: 217 tx_cmd->sec_ctl = TX_CMD_SEC_CCM; 218 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); 219 if (info->flags & IEEE80211_TX_CTL_AMPDU) 220 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; 221 break; 222 223 case WLAN_CIPHER_SUITE_TKIP: 224 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 225 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 226 break; 227 228 case WLAN_CIPHER_SUITE_WEP104: 229 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 230 /* fall through */ 231 case WLAN_CIPHER_SUITE_WEP40: 232 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP | 233 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT); 234 235 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 236 237 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " 238 "with key %d\n", keyconf->keyidx); 239 break; 240 241 default: 242 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher); 243 break; 244 } 245} 246 247/** 248 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta 249 * @context: the current context 250 * @sta: mac80211 station 251 * 252 * In certain circumstances mac80211 passes a station pointer 253 * that may be %NULL, for example during TX or key setup. In 254 * that case, we need to use the broadcast station, so this 255 * inline wraps that pattern. 256 */ 257static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context, 258 struct ieee80211_sta *sta) 259{ 260 int sta_id; 261 262 if (!sta) 263 return context->bcast_sta_id; 264 265 sta_id = iwl_sta_id(sta); 266 267 /* 268 * mac80211 should not be passing a partially 269 * initialised station! 270 */ 271 WARN_ON(sta_id == IWL_INVALID_STATION); 272 273 return sta_id; 274} 275 276/* 277 * start REPLY_TX command process 278 */ 279int iwlagn_tx_skb(struct iwl_priv *priv, 280 struct ieee80211_sta *sta, 281 struct sk_buff *skb) 282{ 283 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 284 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 285 struct iwl_station_priv *sta_priv = NULL; 286 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 287 struct iwl_device_cmd *dev_cmd; 288 struct iwl_tx_cmd *tx_cmd; 289 __le16 fc; 290 u8 hdr_len; 291 u16 len, seq_number = 0; 292 u8 sta_id, tid = IWL_MAX_TID_COUNT; 293 bool is_agg = false, is_data_qos = false; 294 int txq_id; 295 296 if (info->control.vif) 297 ctx = iwl_rxon_ctx_from_vif(info->control.vif); 298 299 if (iwl_is_rfkill(priv)) { 300 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); 301 goto drop_unlock_priv; 302 } 303 304 fc = hdr->frame_control; 305 306#ifdef CONFIG_IWLWIFI_DEBUG 307 if (ieee80211_is_auth(fc)) 308 IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); 309 else if (ieee80211_is_assoc_req(fc)) 310 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); 311 else if (ieee80211_is_reassoc_req(fc)) 312 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); 313#endif 314 315 if (unlikely(ieee80211_is_probe_resp(fc))) { 316 struct iwl_wipan_noa_data *noa_data = 317 rcu_dereference(priv->noa_data); 318 319 if (noa_data && 320 pskb_expand_head(skb, 0, noa_data->length, 321 GFP_ATOMIC) == 0) { 322 memcpy(skb_put(skb, noa_data->length), 323 noa_data->data, noa_data->length); 324 hdr = (struct ieee80211_hdr *)skb->data; 325 } 326 } 327 328 hdr_len = ieee80211_hdrlen(fc); 329 330 /* For management frames use broadcast id to do not break aggregation */ 331 if (!ieee80211_is_data(fc)) 332 sta_id = ctx->bcast_sta_id; 333 else { 334 /* Find index into station table for destination station */ 335 sta_id = iwl_sta_id_or_broadcast(ctx, sta); 336 if (sta_id == IWL_INVALID_STATION) { 337 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", 338 hdr->addr1); 339 goto drop_unlock_priv; 340 } 341 } 342 343 if (sta) 344 sta_priv = (void *)sta->drv_priv; 345 346 if (sta_priv && sta_priv->asleep && 347 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) { 348 /* 349 * This sends an asynchronous command to the device, 350 * but we can rely on it being processed before the 351 * next frame is processed -- and the next frame to 352 * this station is the one that will consume this 353 * counter. 354 * For now set the counter to just 1 since we do not 355 * support uAPSD yet. 356 * 357 * FIXME: If we get two non-bufferable frames one 358 * after the other, we might only send out one of 359 * them because this is racy. 360 */ 361 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1); 362 } 363 364 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans); 365 366 if (unlikely(!dev_cmd)) 367 goto drop_unlock_priv; 368 369 memset(dev_cmd, 0, sizeof(*dev_cmd)); 370 dev_cmd->hdr.cmd = REPLY_TX; 371 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload; 372 373 /* Total # bytes to be transmitted */ 374 len = (u16)skb->len; 375 tx_cmd->len = cpu_to_le16(len); 376 377 if (info->control.hw_key) 378 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb); 379 380 /* TODO need this for burst mode later on */ 381 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id); 382 383 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc); 384 385 memset(&info->status, 0, sizeof(info->status)); 386 387 info->driver_data[0] = ctx; 388 info->driver_data[1] = dev_cmd; 389 /* From now on, we cannot access info->control */ 390 391 spin_lock(&priv->sta_lock); 392 393 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 394 u8 *qc = NULL; 395 struct iwl_tid_data *tid_data; 396 qc = ieee80211_get_qos_ctl(hdr); 397 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 398 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 399 goto drop_unlock_sta; 400 tid_data = &priv->tid_data[sta_id][tid]; 401 402 /* aggregation is on for this <sta,tid> */ 403 if (info->flags & IEEE80211_TX_CTL_AMPDU && 404 tid_data->agg.state != IWL_AGG_ON) { 405 IWL_ERR(priv, 406 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n", 407 info->flags, tid_data->agg.state); 408 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n", 409 sta_id, tid, 410 IEEE80211_SEQ_TO_SN(tid_data->seq_number)); 411 goto drop_unlock_sta; 412 } 413 414 /* We can receive packets from the stack in IWL_AGG_{ON,OFF} 415 * only. Check this here. 416 */ 417 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON && 418 tid_data->agg.state != IWL_AGG_OFF, 419 "Tx while agg.state = %d\n", tid_data->agg.state)) 420 goto drop_unlock_sta; 421 422 seq_number = tid_data->seq_number; 423 seq_number &= IEEE80211_SCTL_SEQ; 424 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 425 hdr->seq_ctrl |= cpu_to_le16(seq_number); 426 seq_number += 0x10; 427 428 if (info->flags & IEEE80211_TX_CTL_AMPDU) 429 is_agg = true; 430 is_data_qos = true; 431 } 432 433 /* Copy MAC header from skb into command buffer */ 434 memcpy(tx_cmd->hdr, hdr, hdr_len); 435 436 txq_id = info->hw_queue; 437 438 if (is_agg) 439 txq_id = priv->tid_data[sta_id][tid].agg.txq_id; 440 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { 441 /* 442 * The microcode will clear the more data 443 * bit in the last frame it transmits. 444 */ 445 hdr->frame_control |= 446 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 447 } 448 449 WARN_ON_ONCE(is_agg && 450 priv->queue_to_mac80211[txq_id] != info->hw_queue); 451 452 IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid, 453 txq_id, seq_number); 454 455 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id)) 456 goto drop_unlock_sta; 457 458 if (is_data_qos && !ieee80211_has_morefrags(fc)) 459 priv->tid_data[sta_id][tid].seq_number = seq_number; 460 461 spin_unlock(&priv->sta_lock); 462 463 /* 464 * Avoid atomic ops if it isn't an associated client. 465 * Also, if this is a packet for aggregation, don't 466 * increase the counter because the ucode will stop 467 * aggregation queues when their respective station 468 * goes to sleep. 469 */ 470 if (sta_priv && sta_priv->client && !is_agg) 471 atomic_inc(&sta_priv->pending_frames); 472 473 return 0; 474 475drop_unlock_sta: 476 if (dev_cmd) 477 iwl_trans_free_tx_cmd(priv->trans, dev_cmd); 478 spin_unlock(&priv->sta_lock); 479drop_unlock_priv: 480 return -1; 481} 482 483static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq) 484{ 485 int q; 486 487 for (q = IWLAGN_FIRST_AMPDU_QUEUE; 488 q < priv->cfg->base_params->num_of_queues; q++) { 489 if (!test_and_set_bit(q, priv->agg_q_alloc)) { 490 priv->queue_to_mac80211[q] = mq; 491 return q; 492 } 493 } 494 495 return -ENOSPC; 496} 497 498static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q) 499{ 500 clear_bit(q, priv->agg_q_alloc); 501 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE; 502} 503 504int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif, 505 struct ieee80211_sta *sta, u16 tid) 506{ 507 struct iwl_tid_data *tid_data; 508 int sta_id, txq_id; 509 enum iwl_agg_state agg_state; 510 511 sta_id = iwl_sta_id(sta); 512 513 if (sta_id == IWL_INVALID_STATION) { 514 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); 515 return -ENXIO; 516 } 517 518 spin_lock_bh(&priv->sta_lock); 519 520 tid_data = &priv->tid_data[sta_id][tid]; 521 txq_id = tid_data->agg.txq_id; 522 523 switch (tid_data->agg.state) { 524 case IWL_EMPTYING_HW_QUEUE_ADDBA: 525 /* 526 * This can happen if the peer stops aggregation 527 * again before we've had a chance to drain the 528 * queue we selected previously, i.e. before the 529 * session was really started completely. 530 */ 531 IWL_DEBUG_HT(priv, "AGG stop before setup done\n"); 532 goto turn_off; 533 case IWL_AGG_STARTING: 534 /* 535 * This can happen when the session is stopped before 536 * we receive ADDBA response 537 */ 538 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n"); 539 goto turn_off; 540 case IWL_AGG_ON: 541 break; 542 default: 543 IWL_WARN(priv, 544 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 545 sta_id, tid, tid_data->agg.state); 546 spin_unlock_bh(&priv->sta_lock); 547 return 0; 548 } 549 550 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 551 552 /* There are still packets for this RA / TID in the HW */ 553 if (!test_bit(txq_id, priv->agg_q_alloc)) { 554 IWL_DEBUG_TX_QUEUES(priv, 555 "stopping AGG on STA/TID %d/%d but hwq %d not used\n", 556 sta_id, tid, txq_id); 557 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) { 558 IWL_DEBUG_TX_QUEUES(priv, 559 "Can't proceed: ssn %d, next_recl = %d\n", 560 tid_data->agg.ssn, 561 tid_data->next_reclaimed); 562 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA; 563 spin_unlock_bh(&priv->sta_lock); 564 return 0; 565 } 566 567 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n", 568 tid_data->agg.ssn); 569turn_off: 570 agg_state = tid_data->agg.state; 571 tid_data->agg.state = IWL_AGG_OFF; 572 573 spin_unlock_bh(&priv->sta_lock); 574 575 if (test_bit(txq_id, priv->agg_q_alloc)) { 576 /* 577 * If the transport didn't know that we wanted to start 578 * agreggation, don't tell it that we want to stop them. 579 * This can happen when we don't get the addBA response on 580 * time, or we hadn't time to drain the AC queues. 581 */ 582 if (agg_state == IWL_AGG_ON) 583 iwl_trans_txq_disable(priv->trans, txq_id, true); 584 else 585 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n", 586 agg_state); 587 iwlagn_dealloc_agg_txq(priv, txq_id); 588 } 589 590 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 591 592 return 0; 593} 594 595int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif, 596 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 597{ 598 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 599 struct iwl_tid_data *tid_data; 600 int sta_id, txq_id, ret; 601 602 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n", 603 sta->addr, tid); 604 605 sta_id = iwl_sta_id(sta); 606 if (sta_id == IWL_INVALID_STATION) { 607 IWL_ERR(priv, "Start AGG on invalid station\n"); 608 return -ENXIO; 609 } 610 if (unlikely(tid >= IWL_MAX_TID_COUNT)) 611 return -EINVAL; 612 613 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) { 614 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); 615 return -ENXIO; 616 } 617 618 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]); 619 if (txq_id < 0) { 620 IWL_DEBUG_TX_QUEUES(priv, 621 "No free aggregation queue for %pM/%d\n", 622 sta->addr, tid); 623 return txq_id; 624 } 625 626 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); 627 if (ret) 628 return ret; 629 630 spin_lock_bh(&priv->sta_lock); 631 tid_data = &priv->tid_data[sta_id][tid]; 632 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 633 tid_data->agg.txq_id = txq_id; 634 635 *ssn = tid_data->agg.ssn; 636 637 if (*ssn == tid_data->next_reclaimed) { 638 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n", 639 tid_data->agg.ssn); 640 tid_data->agg.state = IWL_AGG_STARTING; 641 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 642 } else { 643 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, " 644 "next_reclaimed = %d\n", 645 tid_data->agg.ssn, 646 tid_data->next_reclaimed); 647 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; 648 } 649 spin_unlock_bh(&priv->sta_lock); 650 651 return ret; 652} 653 654int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif, 655 struct ieee80211_sta *sta, u16 tid) 656{ 657 struct iwl_tid_data *tid_data; 658 enum iwl_agg_state agg_state; 659 int sta_id, txq_id; 660 sta_id = iwl_sta_id(sta); 661 662 /* 663 * First set the agg state to OFF to avoid calling 664 * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty. 665 */ 666 spin_lock_bh(&priv->sta_lock); 667 668 tid_data = &priv->tid_data[sta_id][tid]; 669 txq_id = tid_data->agg.txq_id; 670 agg_state = tid_data->agg.state; 671 IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n", 672 sta_id, tid, txq_id, tid_data->agg.state); 673 674 tid_data->agg.state = IWL_AGG_OFF; 675 676 spin_unlock_bh(&priv->sta_lock); 677 678 if (iwlagn_txfifo_flush(priv, BIT(txq_id))) 679 IWL_ERR(priv, "Couldn't flush the AGG queue\n"); 680 681 if (test_bit(txq_id, priv->agg_q_alloc)) { 682 /* 683 * If the transport didn't know that we wanted to start 684 * agreggation, don't tell it that we want to stop them. 685 * This can happen when we don't get the addBA response on 686 * time, or we hadn't time to drain the AC queues. 687 */ 688 if (agg_state == IWL_AGG_ON) 689 iwl_trans_txq_disable(priv->trans, txq_id, true); 690 else 691 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n", 692 agg_state); 693 iwlagn_dealloc_agg_txq(priv, txq_id); 694 } 695 696 return 0; 697} 698 699int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif, 700 struct ieee80211_sta *sta, u16 tid, u8 buf_size) 701{ 702 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 703 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 704 int q, fifo; 705 u16 ssn; 706 707 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 708 709 spin_lock_bh(&priv->sta_lock); 710 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn; 711 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id; 712 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON; 713 spin_unlock_bh(&priv->sta_lock); 714 715 fifo = ctx->ac_to_fifo[tid_to_ac[tid]]; 716 717 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid, 718 buf_size, ssn); 719 720 /* 721 * If the limit is 0, then it wasn't initialised yet, 722 * use the default. We can do that since we take the 723 * minimum below, and we don't want to go above our 724 * default due to hardware restrictions. 725 */ 726 if (sta_priv->max_agg_bufsize == 0) 727 sta_priv->max_agg_bufsize = 728 LINK_QUAL_AGG_FRAME_LIMIT_DEF; 729 730 /* 731 * Even though in theory the peer could have different 732 * aggregation reorder buffer sizes for different sessions, 733 * our ucode doesn't allow for that and has a global limit 734 * for each station. Therefore, use the minimum of all the 735 * aggregation sessions and our default value. 736 */ 737 sta_priv->max_agg_bufsize = 738 min(sta_priv->max_agg_bufsize, buf_size); 739 740 if (priv->hw_params.use_rts_for_aggregation) { 741 /* 742 * switch to RTS/CTS if it is the prefer protection 743 * method for HT traffic 744 */ 745 746 sta_priv->lq_sta.lq.general_params.flags |= 747 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 748 } 749 priv->agg_tids_count++; 750 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 751 priv->agg_tids_count); 752 753 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit = 754 sta_priv->max_agg_bufsize; 755 756 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n", 757 sta->addr, tid); 758 759 return iwl_send_lq_cmd(priv, ctx, 760 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 761} 762 763static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid) 764{ 765 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid]; 766 enum iwl_rxon_context_id ctx; 767 struct ieee80211_vif *vif; 768 u8 *addr; 769 770 lockdep_assert_held(&priv->sta_lock); 771 772 addr = priv->stations[sta_id].sta.sta.addr; 773 ctx = priv->stations[sta_id].ctxid; 774 vif = priv->contexts[ctx].vif; 775 776 switch (priv->tid_data[sta_id][tid].agg.state) { 777 case IWL_EMPTYING_HW_QUEUE_DELBA: 778 /* There are no packets for this RA / TID in the HW any more */ 779 if (tid_data->agg.ssn == tid_data->next_reclaimed) { 780 IWL_DEBUG_TX_QUEUES(priv, 781 "Can continue DELBA flow ssn = next_recl = %d\n", 782 tid_data->next_reclaimed); 783 iwl_trans_txq_disable(priv->trans, 784 tid_data->agg.txq_id, true); 785 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id); 786 tid_data->agg.state = IWL_AGG_OFF; 787 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid); 788 } 789 break; 790 case IWL_EMPTYING_HW_QUEUE_ADDBA: 791 /* There are no packets for this RA / TID in the HW any more */ 792 if (tid_data->agg.ssn == tid_data->next_reclaimed) { 793 IWL_DEBUG_TX_QUEUES(priv, 794 "Can continue ADDBA flow ssn = next_recl = %d\n", 795 tid_data->next_reclaimed); 796 tid_data->agg.state = IWL_AGG_STARTING; 797 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid); 798 } 799 break; 800 default: 801 break; 802 } 803} 804 805static void iwlagn_non_agg_tx_status(struct iwl_priv *priv, 806 struct iwl_rxon_context *ctx, 807 const u8 *addr1) 808{ 809 struct ieee80211_sta *sta; 810 struct iwl_station_priv *sta_priv; 811 812 rcu_read_lock(); 813 sta = ieee80211_find_sta(ctx->vif, addr1); 814 if (sta) { 815 sta_priv = (void *)sta->drv_priv; 816 /* avoid atomic ops if this isn't a client */ 817 if (sta_priv->client && 818 atomic_dec_return(&sta_priv->pending_frames) == 0) 819 ieee80211_sta_block_awake(priv->hw, sta, false); 820 } 821 rcu_read_unlock(); 822} 823 824/** 825 * translate ucode response to mac80211 tx status control values 826 */ 827static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags, 828 struct ieee80211_tx_info *info) 829{ 830 struct ieee80211_tx_rate *r = &info->status.rates[0]; 831 832 info->status.antenna = 833 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 834 if (rate_n_flags & RATE_MCS_HT_MSK) 835 r->flags |= IEEE80211_TX_RC_MCS; 836 if (rate_n_flags & RATE_MCS_GF_MSK) 837 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 838 if (rate_n_flags & RATE_MCS_HT40_MSK) 839 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 840 if (rate_n_flags & RATE_MCS_DUP_MSK) 841 r->flags |= IEEE80211_TX_RC_DUP_DATA; 842 if (rate_n_flags & RATE_MCS_SGI_MSK) 843 r->flags |= IEEE80211_TX_RC_SHORT_GI; 844 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band); 845} 846 847#ifdef CONFIG_IWLWIFI_DEBUG 848const char *iwl_get_tx_fail_reason(u32 status) 849{ 850#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 851#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 852 853 switch (status & TX_STATUS_MSK) { 854 case TX_STATUS_SUCCESS: 855 return "SUCCESS"; 856 TX_STATUS_POSTPONE(DELAY); 857 TX_STATUS_POSTPONE(FEW_BYTES); 858 TX_STATUS_POSTPONE(BT_PRIO); 859 TX_STATUS_POSTPONE(QUIET_PERIOD); 860 TX_STATUS_POSTPONE(CALC_TTAK); 861 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 862 TX_STATUS_FAIL(SHORT_LIMIT); 863 TX_STATUS_FAIL(LONG_LIMIT); 864 TX_STATUS_FAIL(FIFO_UNDERRUN); 865 TX_STATUS_FAIL(DRAIN_FLOW); 866 TX_STATUS_FAIL(RFKILL_FLUSH); 867 TX_STATUS_FAIL(LIFE_EXPIRE); 868 TX_STATUS_FAIL(DEST_PS); 869 TX_STATUS_FAIL(HOST_ABORTED); 870 TX_STATUS_FAIL(BT_RETRY); 871 TX_STATUS_FAIL(STA_INVALID); 872 TX_STATUS_FAIL(FRAG_DROPPED); 873 TX_STATUS_FAIL(TID_DISABLE); 874 TX_STATUS_FAIL(FIFO_FLUSHED); 875 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); 876 TX_STATUS_FAIL(PASSIVE_NO_RX); 877 TX_STATUS_FAIL(NO_BEACON_ON_RADAR); 878 } 879 880 return "UNKNOWN"; 881 882#undef TX_STATUS_FAIL 883#undef TX_STATUS_POSTPONE 884} 885#endif /* CONFIG_IWLWIFI_DEBUG */ 886 887static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status) 888{ 889 status &= AGG_TX_STATUS_MSK; 890 891 switch (status) { 892 case AGG_TX_STATE_UNDERRUN_MSK: 893 priv->reply_agg_tx_stats.underrun++; 894 break; 895 case AGG_TX_STATE_BT_PRIO_MSK: 896 priv->reply_agg_tx_stats.bt_prio++; 897 break; 898 case AGG_TX_STATE_FEW_BYTES_MSK: 899 priv->reply_agg_tx_stats.few_bytes++; 900 break; 901 case AGG_TX_STATE_ABORT_MSK: 902 priv->reply_agg_tx_stats.abort++; 903 break; 904 case AGG_TX_STATE_LAST_SENT_TTL_MSK: 905 priv->reply_agg_tx_stats.last_sent_ttl++; 906 break; 907 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK: 908 priv->reply_agg_tx_stats.last_sent_try++; 909 break; 910 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK: 911 priv->reply_agg_tx_stats.last_sent_bt_kill++; 912 break; 913 case AGG_TX_STATE_SCD_QUERY_MSK: 914 priv->reply_agg_tx_stats.scd_query++; 915 break; 916 case AGG_TX_STATE_TEST_BAD_CRC32_MSK: 917 priv->reply_agg_tx_stats.bad_crc32++; 918 break; 919 case AGG_TX_STATE_RESPONSE_MSK: 920 priv->reply_agg_tx_stats.response++; 921 break; 922 case AGG_TX_STATE_DUMP_TX_MSK: 923 priv->reply_agg_tx_stats.dump_tx++; 924 break; 925 case AGG_TX_STATE_DELAY_TX_MSK: 926 priv->reply_agg_tx_stats.delay_tx++; 927 break; 928 default: 929 priv->reply_agg_tx_stats.unknown++; 930 break; 931 } 932} 933 934static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp) 935{ 936 return le32_to_cpup((__le32 *)&tx_resp->status + 937 tx_resp->frame_count) & IEEE80211_MAX_SN; 938} 939 940static void iwl_rx_reply_tx_agg(struct iwl_priv *priv, 941 struct iwlagn_tx_resp *tx_resp) 942{ 943 struct agg_tx_status *frame_status = &tx_resp->status; 944 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> 945 IWLAGN_TX_RES_TID_POS; 946 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> 947 IWLAGN_TX_RES_RA_POS; 948 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg; 949 u32 status = le16_to_cpu(tx_resp->status.status); 950 int i; 951 952 WARN_ON(tid == IWL_TID_NON_QOS); 953 954 if (agg->wait_for_ba) 955 IWL_DEBUG_TX_REPLY(priv, 956 "got tx response w/o block-ack\n"); 957 958 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); 959 agg->wait_for_ba = (tx_resp->frame_count > 1); 960 961 /* 962 * If the BT kill count is non-zero, we'll get this 963 * notification again. 964 */ 965 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 && 966 priv->lib->bt_params && 967 priv->lib->bt_params->advanced_bt_coexist) { 968 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n"); 969 } 970 971 if (tx_resp->frame_count == 1) 972 return; 973 974 IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n", 975 agg->txq_id, 976 le32_to_cpu(tx_resp->rate_n_flags), 977 iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count); 978 979 /* Construct bit-map of pending frames within Tx window */ 980 for (i = 0; i < tx_resp->frame_count; i++) { 981 u16 fstatus = le16_to_cpu(frame_status[i].status); 982 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS; 983 984 if (status & AGG_TX_STATUS_MSK) 985 iwlagn_count_agg_tx_err_status(priv, fstatus); 986 987 if (status & (AGG_TX_STATE_FEW_BYTES_MSK | 988 AGG_TX_STATE_ABORT_MSK)) 989 continue; 990 991 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1) 992 IWL_DEBUG_TX_REPLY(priv, 993 "%d: status %s (0x%04x), try-count (0x%01x)\n", 994 i, 995 iwl_get_agg_tx_fail_reason(fstatus), 996 fstatus & AGG_TX_STATUS_MSK, 997 retry_cnt); 998 } 999} 1000 1001#ifdef CONFIG_IWLWIFI_DEBUG 1002#define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x 1003 1004const char *iwl_get_agg_tx_fail_reason(u16 status) 1005{ 1006 status &= AGG_TX_STATUS_MSK; 1007 switch (status) { 1008 case AGG_TX_STATE_TRANSMITTED: 1009 return "SUCCESS"; 1010 AGG_TX_STATE_FAIL(UNDERRUN_MSK); 1011 AGG_TX_STATE_FAIL(BT_PRIO_MSK); 1012 AGG_TX_STATE_FAIL(FEW_BYTES_MSK); 1013 AGG_TX_STATE_FAIL(ABORT_MSK); 1014 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK); 1015 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK); 1016 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK); 1017 AGG_TX_STATE_FAIL(SCD_QUERY_MSK); 1018 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK); 1019 AGG_TX_STATE_FAIL(RESPONSE_MSK); 1020 AGG_TX_STATE_FAIL(DUMP_TX_MSK); 1021 AGG_TX_STATE_FAIL(DELAY_TX_MSK); 1022 } 1023 1024 return "UNKNOWN"; 1025} 1026#endif /* CONFIG_IWLWIFI_DEBUG */ 1027 1028static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status) 1029{ 1030 status &= TX_STATUS_MSK; 1031 1032 switch (status) { 1033 case TX_STATUS_POSTPONE_DELAY: 1034 priv->reply_tx_stats.pp_delay++; 1035 break; 1036 case TX_STATUS_POSTPONE_FEW_BYTES: 1037 priv->reply_tx_stats.pp_few_bytes++; 1038 break; 1039 case TX_STATUS_POSTPONE_BT_PRIO: 1040 priv->reply_tx_stats.pp_bt_prio++; 1041 break; 1042 case TX_STATUS_POSTPONE_QUIET_PERIOD: 1043 priv->reply_tx_stats.pp_quiet_period++; 1044 break; 1045 case TX_STATUS_POSTPONE_CALC_TTAK: 1046 priv->reply_tx_stats.pp_calc_ttak++; 1047 break; 1048 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY: 1049 priv->reply_tx_stats.int_crossed_retry++; 1050 break; 1051 case TX_STATUS_FAIL_SHORT_LIMIT: 1052 priv->reply_tx_stats.short_limit++; 1053 break; 1054 case TX_STATUS_FAIL_LONG_LIMIT: 1055 priv->reply_tx_stats.long_limit++; 1056 break; 1057 case TX_STATUS_FAIL_FIFO_UNDERRUN: 1058 priv->reply_tx_stats.fifo_underrun++; 1059 break; 1060 case TX_STATUS_FAIL_DRAIN_FLOW: 1061 priv->reply_tx_stats.drain_flow++; 1062 break; 1063 case TX_STATUS_FAIL_RFKILL_FLUSH: 1064 priv->reply_tx_stats.rfkill_flush++; 1065 break; 1066 case TX_STATUS_FAIL_LIFE_EXPIRE: 1067 priv->reply_tx_stats.life_expire++; 1068 break; 1069 case TX_STATUS_FAIL_DEST_PS: 1070 priv->reply_tx_stats.dest_ps++; 1071 break; 1072 case TX_STATUS_FAIL_HOST_ABORTED: 1073 priv->reply_tx_stats.host_abort++; 1074 break; 1075 case TX_STATUS_FAIL_BT_RETRY: 1076 priv->reply_tx_stats.bt_retry++; 1077 break; 1078 case TX_STATUS_FAIL_STA_INVALID: 1079 priv->reply_tx_stats.sta_invalid++; 1080 break; 1081 case TX_STATUS_FAIL_FRAG_DROPPED: 1082 priv->reply_tx_stats.frag_drop++; 1083 break; 1084 case TX_STATUS_FAIL_TID_DISABLE: 1085 priv->reply_tx_stats.tid_disable++; 1086 break; 1087 case TX_STATUS_FAIL_FIFO_FLUSHED: 1088 priv->reply_tx_stats.fifo_flush++; 1089 break; 1090 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL: 1091 priv->reply_tx_stats.insuff_cf_poll++; 1092 break; 1093 case TX_STATUS_FAIL_PASSIVE_NO_RX: 1094 priv->reply_tx_stats.fail_hw_drop++; 1095 break; 1096 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR: 1097 priv->reply_tx_stats.sta_color_mismatch++; 1098 break; 1099 default: 1100 priv->reply_tx_stats.unknown++; 1101 break; 1102 } 1103} 1104 1105static void iwlagn_set_tx_status(struct iwl_priv *priv, 1106 struct ieee80211_tx_info *info, 1107 struct iwlagn_tx_resp *tx_resp) 1108{ 1109 u16 status = le16_to_cpu(tx_resp->status.status); 1110 1111 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1112 1113 info->status.rates[0].count = tx_resp->failure_frame + 1; 1114 info->flags |= iwl_tx_status_to_mac80211(status); 1115 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags), 1116 info); 1117 if (!iwl_is_tx_success(status)) 1118 iwlagn_count_tx_err_status(priv, status); 1119} 1120 1121static void iwl_check_abort_status(struct iwl_priv *priv, 1122 u8 frame_count, u32 status) 1123{ 1124 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { 1125 IWL_ERR(priv, "Tx flush command to flush out all frames\n"); 1126 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) 1127 queue_work(priv->workqueue, &priv->tx_flush); 1128 } 1129} 1130 1131int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb, 1132 struct iwl_device_cmd *cmd) 1133{ 1134 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1135 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1136 int txq_id = SEQ_TO_QUEUE(sequence); 1137 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence); 1138 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data; 1139 struct ieee80211_hdr *hdr; 1140 u32 status = le16_to_cpu(tx_resp->status.status); 1141 u16 ssn = iwlagn_get_scd_ssn(tx_resp); 1142 int tid; 1143 int sta_id; 1144 int freed; 1145 struct ieee80211_tx_info *info; 1146 struct sk_buff_head skbs; 1147 struct sk_buff *skb; 1148 struct iwl_rxon_context *ctx; 1149 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE); 1150 1151 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> 1152 IWLAGN_TX_RES_TID_POS; 1153 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> 1154 IWLAGN_TX_RES_RA_POS; 1155 1156 spin_lock_bh(&priv->sta_lock); 1157 1158 if (is_agg) { 1159 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT || 1160 tid >= IWL_MAX_TID_COUNT); 1161 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id) 1162 IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id, 1163 priv->tid_data[sta_id][tid].agg.txq_id); 1164 iwl_rx_reply_tx_agg(priv, tx_resp); 1165 } 1166 1167 __skb_queue_head_init(&skbs); 1168 1169 if (tx_resp->frame_count == 1) { 1170 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl); 1171 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10); 1172 1173 if (is_agg) { 1174 /* If this is an aggregation queue, we can rely on the 1175 * ssn since the wifi sequence number corresponds to 1176 * the index in the TFD ring (%256). 1177 * The seq_ctl is the sequence control of the packet 1178 * to which this Tx response relates. But if there is a 1179 * hole in the bitmap of the BA we received, this Tx 1180 * response may allow to reclaim the hole and all the 1181 * subsequent packets that were already acked. 1182 * In that case, seq_ctl != ssn, and the next packet 1183 * to be reclaimed will be ssn and not seq_ctl. 1184 */ 1185 next_reclaimed = ssn; 1186 } 1187 1188 if (tid != IWL_TID_NON_QOS) { 1189 priv->tid_data[sta_id][tid].next_reclaimed = 1190 next_reclaimed; 1191 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n", 1192 next_reclaimed); 1193 } 1194 1195 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs); 1196 1197 iwlagn_check_ratid_empty(priv, sta_id, tid); 1198 freed = 0; 1199 1200 /* process frames */ 1201 skb_queue_walk(&skbs, skb) { 1202 hdr = (struct ieee80211_hdr *)skb->data; 1203 1204 if (!ieee80211_is_data_qos(hdr->frame_control)) 1205 priv->last_seq_ctl = tx_resp->seq_ctl; 1206 1207 info = IEEE80211_SKB_CB(skb); 1208 ctx = info->driver_data[0]; 1209 iwl_trans_free_tx_cmd(priv->trans, 1210 info->driver_data[1]); 1211 1212 memset(&info->status, 0, sizeof(info->status)); 1213 1214 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX && 1215 ctx->vif && 1216 ctx->vif->type == NL80211_IFTYPE_STATION) { 1217 /* block and stop all queues */ 1218 priv->passive_no_rx = true; 1219 IWL_DEBUG_TX_QUEUES(priv, 1220 "stop all queues: passive channel\n"); 1221 ieee80211_stop_queues(priv->hw); 1222 1223 IWL_DEBUG_TX_REPLY(priv, 1224 "TXQ %d status %s (0x%08x) " 1225 "rate_n_flags 0x%x retries %d\n", 1226 txq_id, 1227 iwl_get_tx_fail_reason(status), 1228 status, 1229 le32_to_cpu(tx_resp->rate_n_flags), 1230 tx_resp->failure_frame); 1231 1232 IWL_DEBUG_TX_REPLY(priv, 1233 "FrameCnt = %d, idx=%d\n", 1234 tx_resp->frame_count, cmd_index); 1235 } 1236 1237 /* check if BAR is needed */ 1238 if (is_agg && !iwl_is_tx_success(status)) 1239 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1240 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb), 1241 tx_resp); 1242 if (!is_agg) 1243 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1); 1244 1245 freed++; 1246 } 1247 1248 if (tid != IWL_TID_NON_QOS) { 1249 priv->tid_data[sta_id][tid].next_reclaimed = 1250 next_reclaimed; 1251 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n", 1252 next_reclaimed); 1253 } 1254 1255 if (!is_agg && freed != 1) 1256 IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed); 1257 1258 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id, 1259 iwl_get_tx_fail_reason(status), status); 1260 1261 IWL_DEBUG_TX_REPLY(priv, 1262 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n", 1263 le32_to_cpu(tx_resp->rate_n_flags), 1264 tx_resp->failure_frame, 1265 SEQ_TO_INDEX(sequence), ssn, 1266 le16_to_cpu(tx_resp->seq_ctl)); 1267 } 1268 1269 iwl_check_abort_status(priv, tx_resp->frame_count, status); 1270 spin_unlock_bh(&priv->sta_lock); 1271 1272 while (!skb_queue_empty(&skbs)) { 1273 skb = __skb_dequeue(&skbs); 1274 ieee80211_tx_status(priv->hw, skb); 1275 } 1276 1277 return 0; 1278} 1279 1280/** 1281 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA 1282 * 1283 * Handles block-acknowledge notification from device, which reports success 1284 * of frames sent via aggregation. 1285 */ 1286int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv, 1287 struct iwl_rx_cmd_buffer *rxb, 1288 struct iwl_device_cmd *cmd) 1289{ 1290 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1291 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data; 1292 struct iwl_ht_agg *agg; 1293 struct sk_buff_head reclaimed_skbs; 1294 struct sk_buff *skb; 1295 int sta_id; 1296 int tid; 1297 int freed; 1298 1299 /* "flow" corresponds to Tx queue */ 1300 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 1301 1302 /* "ssn" is start of block-ack Tx window, corresponds to index 1303 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1304 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); 1305 1306 if (scd_flow >= priv->cfg->base_params->num_of_queues) { 1307 IWL_ERR(priv, 1308 "BUG_ON scd_flow is bigger than number of queues\n"); 1309 return 0; 1310 } 1311 1312 sta_id = ba_resp->sta_id; 1313 tid = ba_resp->tid; 1314 agg = &priv->tid_data[sta_id][tid].agg; 1315 1316 spin_lock_bh(&priv->sta_lock); 1317 1318 if (unlikely(!agg->wait_for_ba)) { 1319 if (unlikely(ba_resp->bitmap)) 1320 IWL_ERR(priv, "Received BA when not expected\n"); 1321 spin_unlock_bh(&priv->sta_lock); 1322 return 0; 1323 } 1324 1325 if (unlikely(scd_flow != agg->txq_id)) { 1326 /* 1327 * FIXME: this is a uCode bug which need to be addressed, 1328 * log the information and return for now. 1329 * Since it is can possibly happen very often and in order 1330 * not to fill the syslog, don't use IWL_ERR or IWL_WARN 1331 */ 1332 IWL_DEBUG_TX_QUEUES(priv, 1333 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n", 1334 scd_flow, sta_id, tid, agg->txq_id); 1335 spin_unlock_bh(&priv->sta_lock); 1336 return 0; 1337 } 1338 1339 __skb_queue_head_init(&reclaimed_skbs); 1340 1341 /* Release all TFDs before the SSN, i.e. all TFDs in front of 1342 * block-ack window (we assume that they've been successfully 1343 * transmitted ... if not, it's too late anyway). */ 1344 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn, 1345 &reclaimed_skbs); 1346 1347 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " 1348 "sta_id = %d\n", 1349 agg->wait_for_ba, 1350 (u8 *) &ba_resp->sta_addr_lo32, 1351 ba_resp->sta_id); 1352 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, " 1353 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1354 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl), 1355 (unsigned long long)le64_to_cpu(ba_resp->bitmap), 1356 scd_flow, ba_resp_scd_ssn, ba_resp->txed, 1357 ba_resp->txed_2_done); 1358 1359 /* Mark that the expected block-ack response arrived */ 1360 agg->wait_for_ba = false; 1361 1362 /* Sanity check values reported by uCode */ 1363 if (ba_resp->txed_2_done > ba_resp->txed) { 1364 IWL_DEBUG_TX_REPLY(priv, 1365 "bogus sent(%d) and ack(%d) count\n", 1366 ba_resp->txed, ba_resp->txed_2_done); 1367 /* 1368 * set txed_2_done = txed, 1369 * so it won't impact rate scale 1370 */ 1371 ba_resp->txed = ba_resp->txed_2_done; 1372 } 1373 1374 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn; 1375 1376 iwlagn_check_ratid_empty(priv, sta_id, tid); 1377 freed = 0; 1378 1379 skb_queue_walk(&reclaimed_skbs, skb) { 1380 struct ieee80211_hdr *hdr = (void *)skb->data; 1381 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1382 1383 if (ieee80211_is_data_qos(hdr->frame_control)) 1384 freed++; 1385 else 1386 WARN_ON_ONCE(1); 1387 1388 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]); 1389 1390 memset(&info->status, 0, sizeof(info->status)); 1391 /* Packet was transmitted successfully, failures come as single 1392 * frames because before failing a frame the firmware transmits 1393 * it without aggregation at least once. 1394 */ 1395 info->flags |= IEEE80211_TX_STAT_ACK; 1396 1397 if (freed == 1) { 1398 /* this is the first skb we deliver in this batch */ 1399 /* put the rate scaling data there */ 1400 info = IEEE80211_SKB_CB(skb); 1401 memset(&info->status, 0, sizeof(info->status)); 1402 info->flags |= IEEE80211_TX_STAT_AMPDU; 1403 info->status.ampdu_ack_len = ba_resp->txed_2_done; 1404 info->status.ampdu_len = ba_resp->txed; 1405 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags, 1406 info); 1407 } 1408 } 1409 1410 spin_unlock_bh(&priv->sta_lock); 1411 1412 while (!skb_queue_empty(&reclaimed_skbs)) { 1413 skb = __skb_dequeue(&reclaimed_skbs); 1414 ieee80211_tx_status(priv->hw, skb); 1415 } 1416 1417 return 0; 1418} 1419