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 <linuxwifi@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 40 static 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 51 static 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 */ 64 static 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 == NL80211_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 } 125 126 static 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 == NL80211_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 } 207 208 static 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 */ 257 static 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 */ 279 int 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 memset(info->driver_data, 0, sizeof(info->driver_data)); 387 388 info->driver_data[0] = ctx; 389 info->driver_data[1] = dev_cmd; 390 /* From now on, we cannot access info->control */ 391 392 spin_lock(&priv->sta_lock); 393 394 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 395 u8 *qc = NULL; 396 struct iwl_tid_data *tid_data; 397 qc = ieee80211_get_qos_ctl(hdr); 398 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 399 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 400 goto drop_unlock_sta; 401 tid_data = &priv->tid_data[sta_id][tid]; 402 403 /* aggregation is on for this <sta,tid> */ 404 if (info->flags & IEEE80211_TX_CTL_AMPDU && 405 tid_data->agg.state != IWL_AGG_ON) { 406 IWL_ERR(priv, 407 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n", 408 info->flags, tid_data->agg.state); 409 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n", 410 sta_id, tid, 411 IEEE80211_SEQ_TO_SN(tid_data->seq_number)); 412 goto drop_unlock_sta; 413 } 414 415 /* We can receive packets from the stack in IWL_AGG_{ON,OFF} 416 * only. Check this here. 417 */ 418 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON && 419 tid_data->agg.state != IWL_AGG_OFF, 420 "Tx while agg.state = %d\n", tid_data->agg.state)) 421 goto drop_unlock_sta; 422 423 seq_number = tid_data->seq_number; 424 seq_number &= IEEE80211_SCTL_SEQ; 425 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 426 hdr->seq_ctrl |= cpu_to_le16(seq_number); 427 seq_number += 0x10; 428 429 if (info->flags & IEEE80211_TX_CTL_AMPDU) 430 is_agg = true; 431 is_data_qos = true; 432 } 433 434 /* Copy MAC header from skb into command buffer */ 435 memcpy(tx_cmd->hdr, hdr, hdr_len); 436 437 txq_id = info->hw_queue; 438 439 if (is_agg) 440 txq_id = priv->tid_data[sta_id][tid].agg.txq_id; 441 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { 442 /* 443 * The microcode will clear the more data 444 * bit in the last frame it transmits. 445 */ 446 hdr->frame_control |= 447 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 448 } 449 450 WARN_ON_ONCE(is_agg && 451 priv->queue_to_mac80211[txq_id] != info->hw_queue); 452 453 IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid, 454 txq_id, seq_number); 455 456 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id)) 457 goto drop_unlock_sta; 458 459 if (is_data_qos && !ieee80211_has_morefrags(fc)) 460 priv->tid_data[sta_id][tid].seq_number = seq_number; 461 462 spin_unlock(&priv->sta_lock); 463 464 /* 465 * Avoid atomic ops if it isn't an associated client. 466 * Also, if this is a packet for aggregation, don't 467 * increase the counter because the ucode will stop 468 * aggregation queues when their respective station 469 * goes to sleep. 470 */ 471 if (sta_priv && sta_priv->client && !is_agg) 472 atomic_inc(&sta_priv->pending_frames); 473 474 return 0; 475 476 drop_unlock_sta: 477 if (dev_cmd) 478 iwl_trans_free_tx_cmd(priv->trans, dev_cmd); 479 spin_unlock(&priv->sta_lock); 480 drop_unlock_priv: 481 return -1; 482 } 483 484 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq) 485 { 486 int q; 487 488 for (q = IWLAGN_FIRST_AMPDU_QUEUE; 489 q < priv->cfg->base_params->num_of_queues; q++) { 490 if (!test_and_set_bit(q, priv->agg_q_alloc)) { 491 priv->queue_to_mac80211[q] = mq; 492 return q; 493 } 494 } 495 496 return -ENOSPC; 497 } 498 499 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q) 500 { 501 clear_bit(q, priv->agg_q_alloc); 502 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE; 503 } 504 505 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif, 506 struct ieee80211_sta *sta, u16 tid) 507 { 508 struct iwl_tid_data *tid_data; 509 int sta_id, txq_id; 510 enum iwl_agg_state agg_state; 511 512 sta_id = iwl_sta_id(sta); 513 514 if (sta_id == IWL_INVALID_STATION) { 515 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); 516 return -ENXIO; 517 } 518 519 spin_lock_bh(&priv->sta_lock); 520 521 tid_data = &priv->tid_data[sta_id][tid]; 522 txq_id = tid_data->agg.txq_id; 523 524 switch (tid_data->agg.state) { 525 case IWL_EMPTYING_HW_QUEUE_ADDBA: 526 /* 527 * This can happen if the peer stops aggregation 528 * again before we've had a chance to drain the 529 * queue we selected previously, i.e. before the 530 * session was really started completely. 531 */ 532 IWL_DEBUG_HT(priv, "AGG stop before setup done\n"); 533 goto turn_off; 534 case IWL_AGG_STARTING: 535 /* 536 * This can happen when the session is stopped before 537 * we receive ADDBA response 538 */ 539 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n"); 540 goto turn_off; 541 case IWL_AGG_ON: 542 break; 543 default: 544 IWL_WARN(priv, 545 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 546 sta_id, tid, tid_data->agg.state); 547 spin_unlock_bh(&priv->sta_lock); 548 return 0; 549 } 550 551 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 552 553 /* There are still packets for this RA / TID in the HW */ 554 if (!test_bit(txq_id, priv->agg_q_alloc)) { 555 IWL_DEBUG_TX_QUEUES(priv, 556 "stopping AGG on STA/TID %d/%d but hwq %d not used\n", 557 sta_id, tid, txq_id); 558 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) { 559 IWL_DEBUG_TX_QUEUES(priv, 560 "Can't proceed: ssn %d, next_recl = %d\n", 561 tid_data->agg.ssn, 562 tid_data->next_reclaimed); 563 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA; 564 spin_unlock_bh(&priv->sta_lock); 565 return 0; 566 } 567 568 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n", 569 tid_data->agg.ssn); 570 turn_off: 571 agg_state = tid_data->agg.state; 572 tid_data->agg.state = IWL_AGG_OFF; 573 574 spin_unlock_bh(&priv->sta_lock); 575 576 if (test_bit(txq_id, priv->agg_q_alloc)) { 577 /* 578 * If the transport didn't know that we wanted to start 579 * agreggation, don't tell it that we want to stop them. 580 * This can happen when we don't get the addBA response on 581 * time, or we hadn't time to drain the AC queues. 582 */ 583 if (agg_state == IWL_AGG_ON) 584 iwl_trans_txq_disable(priv->trans, txq_id, true); 585 else 586 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n", 587 agg_state); 588 iwlagn_dealloc_agg_txq(priv, txq_id); 589 } 590 591 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 592 593 return 0; 594 } 595 596 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif, 597 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 598 { 599 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 600 struct iwl_tid_data *tid_data; 601 int sta_id, txq_id, ret; 602 603 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n", 604 sta->addr, tid); 605 606 sta_id = iwl_sta_id(sta); 607 if (sta_id == IWL_INVALID_STATION) { 608 IWL_ERR(priv, "Start AGG on invalid station\n"); 609 return -ENXIO; 610 } 611 if (unlikely(tid >= IWL_MAX_TID_COUNT)) 612 return -EINVAL; 613 614 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) { 615 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); 616 return -ENXIO; 617 } 618 619 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]); 620 if (txq_id < 0) { 621 IWL_DEBUG_TX_QUEUES(priv, 622 "No free aggregation queue for %pM/%d\n", 623 sta->addr, tid); 624 return txq_id; 625 } 626 627 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); 628 if (ret) 629 return ret; 630 631 spin_lock_bh(&priv->sta_lock); 632 tid_data = &priv->tid_data[sta_id][tid]; 633 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 634 tid_data->agg.txq_id = txq_id; 635 636 *ssn = tid_data->agg.ssn; 637 638 if (*ssn == tid_data->next_reclaimed) { 639 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n", 640 tid_data->agg.ssn); 641 tid_data->agg.state = IWL_AGG_STARTING; 642 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 643 } else { 644 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, " 645 "next_reclaimed = %d\n", 646 tid_data->agg.ssn, 647 tid_data->next_reclaimed); 648 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; 649 } 650 spin_unlock_bh(&priv->sta_lock); 651 652 return ret; 653 } 654 655 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif, 656 struct ieee80211_sta *sta, u16 tid) 657 { 658 struct iwl_tid_data *tid_data; 659 enum iwl_agg_state agg_state; 660 int sta_id, txq_id; 661 sta_id = iwl_sta_id(sta); 662 663 /* 664 * First set the agg state to OFF to avoid calling 665 * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty. 666 */ 667 spin_lock_bh(&priv->sta_lock); 668 669 tid_data = &priv->tid_data[sta_id][tid]; 670 txq_id = tid_data->agg.txq_id; 671 agg_state = tid_data->agg.state; 672 IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n", 673 sta_id, tid, txq_id, tid_data->agg.state); 674 675 tid_data->agg.state = IWL_AGG_OFF; 676 677 spin_unlock_bh(&priv->sta_lock); 678 679 if (iwlagn_txfifo_flush(priv, BIT(txq_id))) 680 IWL_ERR(priv, "Couldn't flush the AGG queue\n"); 681 682 if (test_bit(txq_id, priv->agg_q_alloc)) { 683 /* 684 * If the transport didn't know that we wanted to start 685 * agreggation, don't tell it that we want to stop them. 686 * This can happen when we don't get the addBA response on 687 * time, or we hadn't time to drain the AC queues. 688 */ 689 if (agg_state == IWL_AGG_ON) 690 iwl_trans_txq_disable(priv->trans, txq_id, true); 691 else 692 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n", 693 agg_state); 694 iwlagn_dealloc_agg_txq(priv, txq_id); 695 } 696 697 return 0; 698 } 699 700 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif, 701 struct ieee80211_sta *sta, u16 tid, u8 buf_size) 702 { 703 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 704 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 705 int q, fifo; 706 u16 ssn; 707 708 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 709 710 spin_lock_bh(&priv->sta_lock); 711 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn; 712 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id; 713 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON; 714 spin_unlock_bh(&priv->sta_lock); 715 716 fifo = ctx->ac_to_fifo[tid_to_ac[tid]]; 717 718 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid, 719 buf_size, ssn, 0); 720 721 /* 722 * If the limit is 0, then it wasn't initialised yet, 723 * use the default. We can do that since we take the 724 * minimum below, and we don't want to go above our 725 * default due to hardware restrictions. 726 */ 727 if (sta_priv->max_agg_bufsize == 0) 728 sta_priv->max_agg_bufsize = 729 LINK_QUAL_AGG_FRAME_LIMIT_DEF; 730 731 /* 732 * Even though in theory the peer could have different 733 * aggregation reorder buffer sizes for different sessions, 734 * our ucode doesn't allow for that and has a global limit 735 * for each station. Therefore, use the minimum of all the 736 * aggregation sessions and our default value. 737 */ 738 sta_priv->max_agg_bufsize = 739 min(sta_priv->max_agg_bufsize, buf_size); 740 741 if (priv->hw_params.use_rts_for_aggregation) { 742 /* 743 * switch to RTS/CTS if it is the prefer protection 744 * method for HT traffic 745 */ 746 747 sta_priv->lq_sta.lq.general_params.flags |= 748 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 749 } 750 priv->agg_tids_count++; 751 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 752 priv->agg_tids_count); 753 754 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit = 755 sta_priv->max_agg_bufsize; 756 757 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n", 758 sta->addr, tid); 759 760 return iwl_send_lq_cmd(priv, ctx, 761 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 762 } 763 764 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid) 765 { 766 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid]; 767 enum iwl_rxon_context_id ctx; 768 struct ieee80211_vif *vif; 769 u8 *addr; 770 771 lockdep_assert_held(&priv->sta_lock); 772 773 addr = priv->stations[sta_id].sta.sta.addr; 774 ctx = priv->stations[sta_id].ctxid; 775 vif = priv->contexts[ctx].vif; 776 777 switch (priv->tid_data[sta_id][tid].agg.state) { 778 case IWL_EMPTYING_HW_QUEUE_DELBA: 779 /* There are no packets for this RA / TID in the HW any more */ 780 if (tid_data->agg.ssn == tid_data->next_reclaimed) { 781 IWL_DEBUG_TX_QUEUES(priv, 782 "Can continue DELBA flow ssn = next_recl = %d\n", 783 tid_data->next_reclaimed); 784 iwl_trans_txq_disable(priv->trans, 785 tid_data->agg.txq_id, true); 786 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id); 787 tid_data->agg.state = IWL_AGG_OFF; 788 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid); 789 } 790 break; 791 case IWL_EMPTYING_HW_QUEUE_ADDBA: 792 /* There are no packets for this RA / TID in the HW any more */ 793 if (tid_data->agg.ssn == tid_data->next_reclaimed) { 794 IWL_DEBUG_TX_QUEUES(priv, 795 "Can continue ADDBA flow ssn = next_recl = %d\n", 796 tid_data->next_reclaimed); 797 tid_data->agg.state = IWL_AGG_STARTING; 798 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid); 799 } 800 break; 801 default: 802 break; 803 } 804 } 805 806 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv, 807 struct iwl_rxon_context *ctx, 808 const u8 *addr1) 809 { 810 struct ieee80211_sta *sta; 811 struct iwl_station_priv *sta_priv; 812 813 rcu_read_lock(); 814 sta = ieee80211_find_sta(ctx->vif, addr1); 815 if (sta) { 816 sta_priv = (void *)sta->drv_priv; 817 /* avoid atomic ops if this isn't a client */ 818 if (sta_priv->client && 819 atomic_dec_return(&sta_priv->pending_frames) == 0) 820 ieee80211_sta_block_awake(priv->hw, sta, false); 821 } 822 rcu_read_unlock(); 823 } 824 825 /** 826 * translate ucode response to mac80211 tx status control values 827 */ 828 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags, 829 struct ieee80211_tx_info *info) 830 { 831 struct ieee80211_tx_rate *r = &info->status.rates[0]; 832 833 info->status.antenna = 834 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 835 if (rate_n_flags & RATE_MCS_HT_MSK) 836 r->flags |= IEEE80211_TX_RC_MCS; 837 if (rate_n_flags & RATE_MCS_GF_MSK) 838 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 839 if (rate_n_flags & RATE_MCS_HT40_MSK) 840 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 841 if (rate_n_flags & RATE_MCS_DUP_MSK) 842 r->flags |= IEEE80211_TX_RC_DUP_DATA; 843 if (rate_n_flags & RATE_MCS_SGI_MSK) 844 r->flags |= IEEE80211_TX_RC_SHORT_GI; 845 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band); 846 } 847 848 #ifdef CONFIG_IWLWIFI_DEBUG 849 const char *iwl_get_tx_fail_reason(u32 status) 850 { 851 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 852 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 853 854 switch (status & TX_STATUS_MSK) { 855 case TX_STATUS_SUCCESS: 856 return "SUCCESS"; 857 TX_STATUS_POSTPONE(DELAY); 858 TX_STATUS_POSTPONE(FEW_BYTES); 859 TX_STATUS_POSTPONE(BT_PRIO); 860 TX_STATUS_POSTPONE(QUIET_PERIOD); 861 TX_STATUS_POSTPONE(CALC_TTAK); 862 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 863 TX_STATUS_FAIL(SHORT_LIMIT); 864 TX_STATUS_FAIL(LONG_LIMIT); 865 TX_STATUS_FAIL(FIFO_UNDERRUN); 866 TX_STATUS_FAIL(DRAIN_FLOW); 867 TX_STATUS_FAIL(RFKILL_FLUSH); 868 TX_STATUS_FAIL(LIFE_EXPIRE); 869 TX_STATUS_FAIL(DEST_PS); 870 TX_STATUS_FAIL(HOST_ABORTED); 871 TX_STATUS_FAIL(BT_RETRY); 872 TX_STATUS_FAIL(STA_INVALID); 873 TX_STATUS_FAIL(FRAG_DROPPED); 874 TX_STATUS_FAIL(TID_DISABLE); 875 TX_STATUS_FAIL(FIFO_FLUSHED); 876 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); 877 TX_STATUS_FAIL(PASSIVE_NO_RX); 878 TX_STATUS_FAIL(NO_BEACON_ON_RADAR); 879 } 880 881 return "UNKNOWN"; 882 883 #undef TX_STATUS_FAIL 884 #undef TX_STATUS_POSTPONE 885 } 886 #endif /* CONFIG_IWLWIFI_DEBUG */ 887 888 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status) 889 { 890 status &= AGG_TX_STATUS_MSK; 891 892 switch (status) { 893 case AGG_TX_STATE_UNDERRUN_MSK: 894 priv->reply_agg_tx_stats.underrun++; 895 break; 896 case AGG_TX_STATE_BT_PRIO_MSK: 897 priv->reply_agg_tx_stats.bt_prio++; 898 break; 899 case AGG_TX_STATE_FEW_BYTES_MSK: 900 priv->reply_agg_tx_stats.few_bytes++; 901 break; 902 case AGG_TX_STATE_ABORT_MSK: 903 priv->reply_agg_tx_stats.abort++; 904 break; 905 case AGG_TX_STATE_LAST_SENT_TTL_MSK: 906 priv->reply_agg_tx_stats.last_sent_ttl++; 907 break; 908 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK: 909 priv->reply_agg_tx_stats.last_sent_try++; 910 break; 911 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK: 912 priv->reply_agg_tx_stats.last_sent_bt_kill++; 913 break; 914 case AGG_TX_STATE_SCD_QUERY_MSK: 915 priv->reply_agg_tx_stats.scd_query++; 916 break; 917 case AGG_TX_STATE_TEST_BAD_CRC32_MSK: 918 priv->reply_agg_tx_stats.bad_crc32++; 919 break; 920 case AGG_TX_STATE_RESPONSE_MSK: 921 priv->reply_agg_tx_stats.response++; 922 break; 923 case AGG_TX_STATE_DUMP_TX_MSK: 924 priv->reply_agg_tx_stats.dump_tx++; 925 break; 926 case AGG_TX_STATE_DELAY_TX_MSK: 927 priv->reply_agg_tx_stats.delay_tx++; 928 break; 929 default: 930 priv->reply_agg_tx_stats.unknown++; 931 break; 932 } 933 } 934 935 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp) 936 { 937 return le32_to_cpup((__le32 *)&tx_resp->status + 938 tx_resp->frame_count) & IEEE80211_MAX_SN; 939 } 940 941 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv, 942 struct iwlagn_tx_resp *tx_resp) 943 { 944 struct agg_tx_status *frame_status = &tx_resp->status; 945 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> 946 IWLAGN_TX_RES_TID_POS; 947 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> 948 IWLAGN_TX_RES_RA_POS; 949 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg; 950 u32 status = le16_to_cpu(tx_resp->status.status); 951 int i; 952 953 WARN_ON(tid == IWL_TID_NON_QOS); 954 955 if (agg->wait_for_ba) 956 IWL_DEBUG_TX_REPLY(priv, 957 "got tx response w/o block-ack\n"); 958 959 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); 960 agg->wait_for_ba = (tx_resp->frame_count > 1); 961 962 /* 963 * If the BT kill count is non-zero, we'll get this 964 * notification again. 965 */ 966 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 && 967 priv->lib->bt_params && 968 priv->lib->bt_params->advanced_bt_coexist) { 969 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n"); 970 } 971 972 if (tx_resp->frame_count == 1) 973 return; 974 975 IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n", 976 agg->txq_id, 977 le32_to_cpu(tx_resp->rate_n_flags), 978 iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count); 979 980 /* Construct bit-map of pending frames within Tx window */ 981 for (i = 0; i < tx_resp->frame_count; i++) { 982 u16 fstatus = le16_to_cpu(frame_status[i].status); 983 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS; 984 985 if (status & AGG_TX_STATUS_MSK) 986 iwlagn_count_agg_tx_err_status(priv, fstatus); 987 988 if (status & (AGG_TX_STATE_FEW_BYTES_MSK | 989 AGG_TX_STATE_ABORT_MSK)) 990 continue; 991 992 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1) 993 IWL_DEBUG_TX_REPLY(priv, 994 "%d: status %s (0x%04x), try-count (0x%01x)\n", 995 i, 996 iwl_get_agg_tx_fail_reason(fstatus), 997 fstatus & AGG_TX_STATUS_MSK, 998 retry_cnt); 999 } 1000 } 1001 1002 #ifdef CONFIG_IWLWIFI_DEBUG 1003 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x 1004 1005 const char *iwl_get_agg_tx_fail_reason(u16 status) 1006 { 1007 status &= AGG_TX_STATUS_MSK; 1008 switch (status) { 1009 case AGG_TX_STATE_TRANSMITTED: 1010 return "SUCCESS"; 1011 AGG_TX_STATE_FAIL(UNDERRUN_MSK); 1012 AGG_TX_STATE_FAIL(BT_PRIO_MSK); 1013 AGG_TX_STATE_FAIL(FEW_BYTES_MSK); 1014 AGG_TX_STATE_FAIL(ABORT_MSK); 1015 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK); 1016 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK); 1017 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK); 1018 AGG_TX_STATE_FAIL(SCD_QUERY_MSK); 1019 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK); 1020 AGG_TX_STATE_FAIL(RESPONSE_MSK); 1021 AGG_TX_STATE_FAIL(DUMP_TX_MSK); 1022 AGG_TX_STATE_FAIL(DELAY_TX_MSK); 1023 } 1024 1025 return "UNKNOWN"; 1026 } 1027 #endif /* CONFIG_IWLWIFI_DEBUG */ 1028 1029 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status) 1030 { 1031 status &= TX_STATUS_MSK; 1032 1033 switch (status) { 1034 case TX_STATUS_POSTPONE_DELAY: 1035 priv->reply_tx_stats.pp_delay++; 1036 break; 1037 case TX_STATUS_POSTPONE_FEW_BYTES: 1038 priv->reply_tx_stats.pp_few_bytes++; 1039 break; 1040 case TX_STATUS_POSTPONE_BT_PRIO: 1041 priv->reply_tx_stats.pp_bt_prio++; 1042 break; 1043 case TX_STATUS_POSTPONE_QUIET_PERIOD: 1044 priv->reply_tx_stats.pp_quiet_period++; 1045 break; 1046 case TX_STATUS_POSTPONE_CALC_TTAK: 1047 priv->reply_tx_stats.pp_calc_ttak++; 1048 break; 1049 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY: 1050 priv->reply_tx_stats.int_crossed_retry++; 1051 break; 1052 case TX_STATUS_FAIL_SHORT_LIMIT: 1053 priv->reply_tx_stats.short_limit++; 1054 break; 1055 case TX_STATUS_FAIL_LONG_LIMIT: 1056 priv->reply_tx_stats.long_limit++; 1057 break; 1058 case TX_STATUS_FAIL_FIFO_UNDERRUN: 1059 priv->reply_tx_stats.fifo_underrun++; 1060 break; 1061 case TX_STATUS_FAIL_DRAIN_FLOW: 1062 priv->reply_tx_stats.drain_flow++; 1063 break; 1064 case TX_STATUS_FAIL_RFKILL_FLUSH: 1065 priv->reply_tx_stats.rfkill_flush++; 1066 break; 1067 case TX_STATUS_FAIL_LIFE_EXPIRE: 1068 priv->reply_tx_stats.life_expire++; 1069 break; 1070 case TX_STATUS_FAIL_DEST_PS: 1071 priv->reply_tx_stats.dest_ps++; 1072 break; 1073 case TX_STATUS_FAIL_HOST_ABORTED: 1074 priv->reply_tx_stats.host_abort++; 1075 break; 1076 case TX_STATUS_FAIL_BT_RETRY: 1077 priv->reply_tx_stats.bt_retry++; 1078 break; 1079 case TX_STATUS_FAIL_STA_INVALID: 1080 priv->reply_tx_stats.sta_invalid++; 1081 break; 1082 case TX_STATUS_FAIL_FRAG_DROPPED: 1083 priv->reply_tx_stats.frag_drop++; 1084 break; 1085 case TX_STATUS_FAIL_TID_DISABLE: 1086 priv->reply_tx_stats.tid_disable++; 1087 break; 1088 case TX_STATUS_FAIL_FIFO_FLUSHED: 1089 priv->reply_tx_stats.fifo_flush++; 1090 break; 1091 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL: 1092 priv->reply_tx_stats.insuff_cf_poll++; 1093 break; 1094 case TX_STATUS_FAIL_PASSIVE_NO_RX: 1095 priv->reply_tx_stats.fail_hw_drop++; 1096 break; 1097 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR: 1098 priv->reply_tx_stats.sta_color_mismatch++; 1099 break; 1100 default: 1101 priv->reply_tx_stats.unknown++; 1102 break; 1103 } 1104 } 1105 1106 static void iwlagn_set_tx_status(struct iwl_priv *priv, 1107 struct ieee80211_tx_info *info, 1108 struct iwlagn_tx_resp *tx_resp) 1109 { 1110 u16 status = le16_to_cpu(tx_resp->status.status); 1111 1112 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1113 1114 info->status.rates[0].count = tx_resp->failure_frame + 1; 1115 info->flags |= iwl_tx_status_to_mac80211(status); 1116 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags), 1117 info); 1118 if (!iwl_is_tx_success(status)) 1119 iwlagn_count_tx_err_status(priv, status); 1120 } 1121 1122 static void iwl_check_abort_status(struct iwl_priv *priv, 1123 u8 frame_count, u32 status) 1124 { 1125 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { 1126 IWL_ERR(priv, "Tx flush command to flush out all frames\n"); 1127 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) 1128 queue_work(priv->workqueue, &priv->tx_flush); 1129 } 1130 } 1131 1132 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb) 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 1278 /** 1279 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA 1280 * 1281 * Handles block-acknowledge notification from device, which reports success 1282 * of frames sent via aggregation. 1283 */ 1284 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv, 1285 struct iwl_rx_cmd_buffer *rxb) 1286 { 1287 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1288 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data; 1289 struct iwl_ht_agg *agg; 1290 struct sk_buff_head reclaimed_skbs; 1291 struct sk_buff *skb; 1292 int sta_id; 1293 int tid; 1294 int freed; 1295 1296 /* "flow" corresponds to Tx queue */ 1297 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 1298 1299 /* "ssn" is start of block-ack Tx window, corresponds to index 1300 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1301 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); 1302 1303 if (scd_flow >= priv->cfg->base_params->num_of_queues) { 1304 IWL_ERR(priv, 1305 "BUG_ON scd_flow is bigger than number of queues\n"); 1306 return; 1307 } 1308 1309 sta_id = ba_resp->sta_id; 1310 tid = ba_resp->tid; 1311 agg = &priv->tid_data[sta_id][tid].agg; 1312 1313 spin_lock_bh(&priv->sta_lock); 1314 1315 if (unlikely(!agg->wait_for_ba)) { 1316 if (unlikely(ba_resp->bitmap)) 1317 IWL_ERR(priv, "Received BA when not expected\n"); 1318 spin_unlock_bh(&priv->sta_lock); 1319 return; 1320 } 1321 1322 if (unlikely(scd_flow != agg->txq_id)) { 1323 /* 1324 * FIXME: this is a uCode bug which need to be addressed, 1325 * log the information and return for now. 1326 * Since it is can possibly happen very often and in order 1327 * not to fill the syslog, don't use IWL_ERR or IWL_WARN 1328 */ 1329 IWL_DEBUG_TX_QUEUES(priv, 1330 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n", 1331 scd_flow, sta_id, tid, agg->txq_id); 1332 spin_unlock_bh(&priv->sta_lock); 1333 return; 1334 } 1335 1336 __skb_queue_head_init(&reclaimed_skbs); 1337 1338 /* Release all TFDs before the SSN, i.e. all TFDs in front of 1339 * block-ack window (we assume that they've been successfully 1340 * transmitted ... if not, it's too late anyway). */ 1341 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn, 1342 &reclaimed_skbs); 1343 1344 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " 1345 "sta_id = %d\n", 1346 agg->wait_for_ba, 1347 (u8 *) &ba_resp->sta_addr_lo32, 1348 ba_resp->sta_id); 1349 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, " 1350 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1351 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl), 1352 (unsigned long long)le64_to_cpu(ba_resp->bitmap), 1353 scd_flow, ba_resp_scd_ssn, ba_resp->txed, 1354 ba_resp->txed_2_done); 1355 1356 /* Mark that the expected block-ack response arrived */ 1357 agg->wait_for_ba = false; 1358 1359 /* Sanity check values reported by uCode */ 1360 if (ba_resp->txed_2_done > ba_resp->txed) { 1361 IWL_DEBUG_TX_REPLY(priv, 1362 "bogus sent(%d) and ack(%d) count\n", 1363 ba_resp->txed, ba_resp->txed_2_done); 1364 /* 1365 * set txed_2_done = txed, 1366 * so it won't impact rate scale 1367 */ 1368 ba_resp->txed = ba_resp->txed_2_done; 1369 } 1370 1371 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn; 1372 1373 iwlagn_check_ratid_empty(priv, sta_id, tid); 1374 freed = 0; 1375 1376 skb_queue_walk(&reclaimed_skbs, skb) { 1377 struct ieee80211_hdr *hdr = (void *)skb->data; 1378 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1379 1380 if (ieee80211_is_data_qos(hdr->frame_control)) 1381 freed++; 1382 else 1383 WARN_ON_ONCE(1); 1384 1385 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]); 1386 1387 memset(&info->status, 0, sizeof(info->status)); 1388 /* Packet was transmitted successfully, failures come as single 1389 * frames because before failing a frame the firmware transmits 1390 * it without aggregation at least once. 1391 */ 1392 info->flags |= IEEE80211_TX_STAT_ACK; 1393 1394 if (freed == 1) { 1395 /* this is the first skb we deliver in this batch */ 1396 /* put the rate scaling data there */ 1397 info = IEEE80211_SKB_CB(skb); 1398 memset(&info->status, 0, sizeof(info->status)); 1399 info->flags |= IEEE80211_TX_STAT_AMPDU; 1400 info->status.ampdu_ack_len = ba_resp->txed_2_done; 1401 info->status.ampdu_len = ba_resp->txed; 1402 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags, 1403 info); 1404 } 1405 } 1406 1407 spin_unlock_bh(&priv->sta_lock); 1408 1409 while (!skb_queue_empty(&reclaimed_skbs)) { 1410 skb = __skb_dequeue(&reclaimed_skbs); 1411 ieee80211_tx_status(priv->hw, skb); 1412 } 1413 } 1414