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 * The full GNU General Public License is included in this distribution 17 * in the file called COPYING. 18 * 19 * Contact Information: 20 * Intel Linux Wireless <linuxwifi@intel.com> 21 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 22 * 23 *****************************************************************************/ 24 25 #include <linux/kernel.h> 26 #include <linux/module.h> 27 #include <linux/sched.h> 28 #include <linux/ieee80211.h> 29 #include "iwl-io.h" 30 #include "iwl-trans.h" 31 #include "iwl-agn-hw.h" 32 #include "dev.h" 33 #include "agn.h" 34 35 static const u8 tid_to_ac[] = { 36 IEEE80211_AC_BE, 37 IEEE80211_AC_BK, 38 IEEE80211_AC_BK, 39 IEEE80211_AC_BE, 40 IEEE80211_AC_VI, 41 IEEE80211_AC_VI, 42 IEEE80211_AC_VO, 43 IEEE80211_AC_VO, 44 }; 45 46 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv, 47 struct ieee80211_tx_info *info, 48 __le16 fc, __le32 *tx_flags) 49 { 50 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS || 51 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT || 52 info->flags & IEEE80211_TX_CTL_AMPDU) 53 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; 54 } 55 56 /* 57 * handle build REPLY_TX command notification. 58 */ 59 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv, 60 struct sk_buff *skb, 61 struct iwl_tx_cmd *tx_cmd, 62 struct ieee80211_tx_info *info, 63 struct ieee80211_hdr *hdr, u8 sta_id) 64 { 65 __le16 fc = hdr->frame_control; 66 __le32 tx_flags = tx_cmd->tx_flags; 67 68 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 69 70 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 71 tx_flags |= TX_CMD_FLG_ACK_MSK; 72 else 73 tx_flags &= ~TX_CMD_FLG_ACK_MSK; 74 75 if (ieee80211_is_probe_resp(fc)) 76 tx_flags |= TX_CMD_FLG_TSF_MSK; 77 else if (ieee80211_is_back_req(fc)) 78 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; 79 else if (info->band == NL80211_BAND_2GHZ && 80 priv->lib->bt_params && 81 priv->lib->bt_params->advanced_bt_coexist && 82 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) || 83 ieee80211_is_reassoc_req(fc) || 84 info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO)) 85 tx_flags |= TX_CMD_FLG_IGNORE_BT; 86 87 88 tx_cmd->sta_id = sta_id; 89 if (ieee80211_has_morefrags(fc)) 90 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; 91 92 if (ieee80211_is_data_qos(fc)) { 93 u8 *qc = ieee80211_get_qos_ctl(hdr); 94 tx_cmd->tid_tspec = qc[0] & 0xf; 95 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; 96 } else { 97 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 98 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 99 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 100 else 101 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; 102 } 103 104 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags); 105 106 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); 107 if (ieee80211_is_mgmt(fc)) { 108 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 109 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); 110 else 111 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); 112 } else { 113 tx_cmd->timeout.pm_frame_timeout = 0; 114 } 115 116 tx_cmd->driver_txop = 0; 117 tx_cmd->tx_flags = tx_flags; 118 tx_cmd->next_frame_len = 0; 119 } 120 121 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv, 122 struct iwl_tx_cmd *tx_cmd, 123 struct ieee80211_tx_info *info, 124 struct ieee80211_sta *sta, 125 __le16 fc) 126 { 127 u32 rate_flags; 128 int rate_idx; 129 u8 rts_retry_limit; 130 u8 data_retry_limit; 131 u8 rate_plcp; 132 133 if (priv->wowlan) { 134 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT; 135 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT; 136 } else { 137 /* Set retry limit on RTS packets */ 138 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT; 139 140 /* Set retry limit on DATA packets and Probe Responses*/ 141 if (ieee80211_is_probe_resp(fc)) { 142 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT; 143 rts_retry_limit = 144 min(data_retry_limit, rts_retry_limit); 145 } else if (ieee80211_is_back_req(fc)) 146 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT; 147 else 148 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY; 149 } 150 151 tx_cmd->data_retry_limit = data_retry_limit; 152 tx_cmd->rts_retry_limit = rts_retry_limit; 153 154 /* DATA packets will use the uCode station table for rate/antenna 155 * selection */ 156 if (ieee80211_is_data(fc)) { 157 tx_cmd->initial_rate_index = 0; 158 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; 159 return; 160 } else if (ieee80211_is_back_req(fc)) 161 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; 162 163 /** 164 * If the current TX rate stored in mac80211 has the MCS bit set, it's 165 * not really a TX rate. Thus, we use the lowest supported rate for 166 * this band. Also use the lowest supported rate if the stored rate 167 * index is invalid. 168 */ 169 rate_idx = info->control.rates[0].idx; 170 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS || 171 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY)) 172 rate_idx = rate_lowest_index( 173 &priv->nvm_data->bands[info->band], sta); 174 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 175 if (info->band == NL80211_BAND_5GHZ) 176 rate_idx += IWL_FIRST_OFDM_RATE; 177 /* Get PLCP rate for tx_cmd->rate_n_flags */ 178 rate_plcp = iwl_rates[rate_idx].plcp; 179 /* Zero out flags for this packet */ 180 rate_flags = 0; 181 182 /* Set CCK flag as needed */ 183 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 184 rate_flags |= RATE_MCS_CCK_MSK; 185 186 /* Set up antennas */ 187 if (priv->lib->bt_params && 188 priv->lib->bt_params->advanced_bt_coexist && 189 priv->bt_full_concurrent) { 190 /* operated as 1x1 in full concurrency mode */ 191 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, 192 first_antenna(priv->nvm_data->valid_tx_ant)); 193 } else 194 priv->mgmt_tx_ant = iwl_toggle_tx_ant( 195 priv, priv->mgmt_tx_ant, 196 priv->nvm_data->valid_tx_ant); 197 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant); 198 199 /* Set the rate in the TX cmd */ 200 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags); 201 } 202 203 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv, 204 struct ieee80211_tx_info *info, 205 struct iwl_tx_cmd *tx_cmd, 206 struct sk_buff *skb_frag) 207 { 208 struct ieee80211_key_conf *keyconf = info->control.hw_key; 209 210 switch (keyconf->cipher) { 211 case WLAN_CIPHER_SUITE_CCMP: 212 tx_cmd->sec_ctl = TX_CMD_SEC_CCM; 213 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); 214 if (info->flags & IEEE80211_TX_CTL_AMPDU) 215 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; 216 break; 217 218 case WLAN_CIPHER_SUITE_TKIP: 219 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 220 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 221 break; 222 223 case WLAN_CIPHER_SUITE_WEP104: 224 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 225 /* fall through */ 226 case WLAN_CIPHER_SUITE_WEP40: 227 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP | 228 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT); 229 230 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 231 232 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " 233 "with key %d\n", keyconf->keyidx); 234 break; 235 236 default: 237 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher); 238 break; 239 } 240 } 241 242 /** 243 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta 244 * @context: the current context 245 * @sta: mac80211 station 246 * 247 * In certain circumstances mac80211 passes a station pointer 248 * that may be %NULL, for example during TX or key setup. In 249 * that case, we need to use the broadcast station, so this 250 * inline wraps that pattern. 251 */ 252 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context, 253 struct ieee80211_sta *sta) 254 { 255 int sta_id; 256 257 if (!sta) 258 return context->bcast_sta_id; 259 260 sta_id = iwl_sta_id(sta); 261 262 /* 263 * mac80211 should not be passing a partially 264 * initialised station! 265 */ 266 WARN_ON(sta_id == IWL_INVALID_STATION); 267 268 return sta_id; 269 } 270 271 /* 272 * start REPLY_TX command process 273 */ 274 int iwlagn_tx_skb(struct iwl_priv *priv, 275 struct ieee80211_sta *sta, 276 struct sk_buff *skb) 277 { 278 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 279 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 280 struct iwl_station_priv *sta_priv = NULL; 281 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 282 struct iwl_device_cmd *dev_cmd; 283 struct iwl_tx_cmd *tx_cmd; 284 __le16 fc; 285 u8 hdr_len; 286 u16 len, seq_number = 0; 287 u8 sta_id, tid = IWL_MAX_TID_COUNT; 288 bool is_agg = false, is_data_qos = false; 289 int txq_id; 290 291 if (info->control.vif) 292 ctx = iwl_rxon_ctx_from_vif(info->control.vif); 293 294 if (iwl_is_rfkill(priv)) { 295 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); 296 goto drop_unlock_priv; 297 } 298 299 fc = hdr->frame_control; 300 301 #ifdef CONFIG_IWLWIFI_DEBUG 302 if (ieee80211_is_auth(fc)) 303 IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); 304 else if (ieee80211_is_assoc_req(fc)) 305 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); 306 else if (ieee80211_is_reassoc_req(fc)) 307 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); 308 #endif 309 310 if (unlikely(ieee80211_is_probe_resp(fc))) { 311 struct iwl_wipan_noa_data *noa_data = 312 rcu_dereference(priv->noa_data); 313 314 if (noa_data && 315 pskb_expand_head(skb, 0, noa_data->length, 316 GFP_ATOMIC) == 0) { 317 skb_put_data(skb, noa_data->data, noa_data->length); 318 hdr = (struct ieee80211_hdr *)skb->data; 319 } 320 } 321 322 hdr_len = ieee80211_hdrlen(fc); 323 324 /* For management frames use broadcast id to do not break aggregation */ 325 if (!ieee80211_is_data(fc)) 326 sta_id = ctx->bcast_sta_id; 327 else { 328 /* Find index into station table for destination station */ 329 sta_id = iwl_sta_id_or_broadcast(ctx, sta); 330 if (sta_id == IWL_INVALID_STATION) { 331 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", 332 hdr->addr1); 333 goto drop_unlock_priv; 334 } 335 } 336 337 if (sta) 338 sta_priv = (void *)sta->drv_priv; 339 340 if (sta_priv && sta_priv->asleep && 341 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) { 342 /* 343 * This sends an asynchronous command to the device, 344 * but we can rely on it being processed before the 345 * next frame is processed -- and the next frame to 346 * this station is the one that will consume this 347 * counter. 348 * For now set the counter to just 1 since we do not 349 * support uAPSD yet. 350 * 351 * FIXME: If we get two non-bufferable frames one 352 * after the other, we might only send out one of 353 * them because this is racy. 354 */ 355 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1); 356 } 357 358 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans); 359 360 if (unlikely(!dev_cmd)) 361 goto drop_unlock_priv; 362 363 memset(dev_cmd, 0, sizeof(*dev_cmd)); 364 dev_cmd->hdr.cmd = REPLY_TX; 365 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload; 366 367 /* Total # bytes to be transmitted */ 368 len = (u16)skb->len; 369 tx_cmd->len = cpu_to_le16(len); 370 371 if (info->control.hw_key) 372 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb); 373 374 /* TODO need this for burst mode later on */ 375 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id); 376 377 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc); 378 379 memset(&info->status, 0, sizeof(info->status)); 380 memset(info->driver_data, 0, sizeof(info->driver_data)); 381 382 info->driver_data[0] = ctx; 383 info->driver_data[1] = dev_cmd; 384 /* From now on, we cannot access info->control */ 385 386 spin_lock(&priv->sta_lock); 387 388 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 389 u8 *qc = NULL; 390 struct iwl_tid_data *tid_data; 391 qc = ieee80211_get_qos_ctl(hdr); 392 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 393 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 394 goto drop_unlock_sta; 395 tid_data = &priv->tid_data[sta_id][tid]; 396 397 /* aggregation is on for this <sta,tid> */ 398 if (info->flags & IEEE80211_TX_CTL_AMPDU && 399 tid_data->agg.state != IWL_AGG_ON) { 400 IWL_ERR(priv, 401 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n", 402 info->flags, tid_data->agg.state); 403 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n", 404 sta_id, tid, 405 IEEE80211_SEQ_TO_SN(tid_data->seq_number)); 406 goto drop_unlock_sta; 407 } 408 409 /* We can receive packets from the stack in IWL_AGG_{ON,OFF} 410 * only. Check this here. 411 */ 412 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON && 413 tid_data->agg.state != IWL_AGG_OFF, 414 "Tx while agg.state = %d\n", tid_data->agg.state)) 415 goto drop_unlock_sta; 416 417 seq_number = tid_data->seq_number; 418 seq_number &= IEEE80211_SCTL_SEQ; 419 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 420 hdr->seq_ctrl |= cpu_to_le16(seq_number); 421 seq_number += 0x10; 422 423 if (info->flags & IEEE80211_TX_CTL_AMPDU) 424 is_agg = true; 425 is_data_qos = true; 426 } 427 428 /* Copy MAC header from skb into command buffer */ 429 memcpy(tx_cmd->hdr, hdr, hdr_len); 430 431 txq_id = info->hw_queue; 432 433 if (is_agg) 434 txq_id = priv->tid_data[sta_id][tid].agg.txq_id; 435 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { 436 /* 437 * The microcode will clear the more data 438 * bit in the last frame it transmits. 439 */ 440 hdr->frame_control |= 441 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 442 } 443 444 WARN_ON_ONCE(is_agg && 445 priv->queue_to_mac80211[txq_id] != info->hw_queue); 446 447 IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid, 448 txq_id, seq_number); 449 450 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id)) 451 goto drop_unlock_sta; 452 453 if (is_data_qos && !ieee80211_has_morefrags(fc)) 454 priv->tid_data[sta_id][tid].seq_number = seq_number; 455 456 spin_unlock(&priv->sta_lock); 457 458 /* 459 * Avoid atomic ops if it isn't an associated client. 460 * Also, if this is a packet for aggregation, don't 461 * increase the counter because the ucode will stop 462 * aggregation queues when their respective station 463 * goes to sleep. 464 */ 465 if (sta_priv && sta_priv->client && !is_agg) 466 atomic_inc(&sta_priv->pending_frames); 467 468 return 0; 469 470 drop_unlock_sta: 471 if (dev_cmd) 472 iwl_trans_free_tx_cmd(priv->trans, dev_cmd); 473 spin_unlock(&priv->sta_lock); 474 drop_unlock_priv: 475 return -1; 476 } 477 478 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq) 479 { 480 int q; 481 482 for (q = IWLAGN_FIRST_AMPDU_QUEUE; 483 q < priv->cfg->base_params->num_of_queues; q++) { 484 if (!test_and_set_bit(q, priv->agg_q_alloc)) { 485 priv->queue_to_mac80211[q] = mq; 486 return q; 487 } 488 } 489 490 return -ENOSPC; 491 } 492 493 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q) 494 { 495 clear_bit(q, priv->agg_q_alloc); 496 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE; 497 } 498 499 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif, 500 struct ieee80211_sta *sta, u16 tid) 501 { 502 struct iwl_tid_data *tid_data; 503 int sta_id, txq_id; 504 enum iwl_agg_state agg_state; 505 506 sta_id = iwl_sta_id(sta); 507 508 if (sta_id == IWL_INVALID_STATION) { 509 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); 510 return -ENXIO; 511 } 512 513 spin_lock_bh(&priv->sta_lock); 514 515 tid_data = &priv->tid_data[sta_id][tid]; 516 txq_id = tid_data->agg.txq_id; 517 518 switch (tid_data->agg.state) { 519 case IWL_EMPTYING_HW_QUEUE_ADDBA: 520 /* 521 * This can happen if the peer stops aggregation 522 * again before we've had a chance to drain the 523 * queue we selected previously, i.e. before the 524 * session was really started completely. 525 */ 526 IWL_DEBUG_HT(priv, "AGG stop before setup done\n"); 527 goto turn_off; 528 case IWL_AGG_STARTING: 529 /* 530 * This can happen when the session is stopped before 531 * we receive ADDBA response 532 */ 533 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n"); 534 goto turn_off; 535 case IWL_AGG_ON: 536 break; 537 default: 538 IWL_WARN(priv, 539 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 540 sta_id, tid, tid_data->agg.state); 541 spin_unlock_bh(&priv->sta_lock); 542 return 0; 543 } 544 545 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 546 547 /* There are still packets for this RA / TID in the HW */ 548 if (!test_bit(txq_id, priv->agg_q_alloc)) { 549 IWL_DEBUG_TX_QUEUES(priv, 550 "stopping AGG on STA/TID %d/%d but hwq %d not used\n", 551 sta_id, tid, txq_id); 552 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) { 553 IWL_DEBUG_TX_QUEUES(priv, 554 "Can't proceed: ssn %d, next_recl = %d\n", 555 tid_data->agg.ssn, 556 tid_data->next_reclaimed); 557 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA; 558 spin_unlock_bh(&priv->sta_lock); 559 return 0; 560 } 561 562 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n", 563 tid_data->agg.ssn); 564 turn_off: 565 agg_state = tid_data->agg.state; 566 tid_data->agg.state = IWL_AGG_OFF; 567 568 spin_unlock_bh(&priv->sta_lock); 569 570 if (test_bit(txq_id, priv->agg_q_alloc)) { 571 /* 572 * If the transport didn't know that we wanted to start 573 * agreggation, don't tell it that we want to stop them. 574 * This can happen when we don't get the addBA response on 575 * time, or we hadn't time to drain the AC queues. 576 */ 577 if (agg_state == IWL_AGG_ON) 578 iwl_trans_txq_disable(priv->trans, txq_id, true); 579 else 580 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n", 581 agg_state); 582 iwlagn_dealloc_agg_txq(priv, txq_id); 583 } 584 585 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 586 587 return 0; 588 } 589 590 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif, 591 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 592 { 593 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 594 struct iwl_tid_data *tid_data; 595 int sta_id, txq_id, ret; 596 597 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n", 598 sta->addr, tid); 599 600 sta_id = iwl_sta_id(sta); 601 if (sta_id == IWL_INVALID_STATION) { 602 IWL_ERR(priv, "Start AGG on invalid station\n"); 603 return -ENXIO; 604 } 605 if (unlikely(tid >= IWL_MAX_TID_COUNT)) 606 return -EINVAL; 607 608 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) { 609 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); 610 return -ENXIO; 611 } 612 613 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]); 614 if (txq_id < 0) { 615 IWL_DEBUG_TX_QUEUES(priv, 616 "No free aggregation queue for %pM/%d\n", 617 sta->addr, tid); 618 return txq_id; 619 } 620 621 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); 622 if (ret) 623 return ret; 624 625 spin_lock_bh(&priv->sta_lock); 626 tid_data = &priv->tid_data[sta_id][tid]; 627 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 628 tid_data->agg.txq_id = txq_id; 629 630 *ssn = tid_data->agg.ssn; 631 632 if (*ssn == tid_data->next_reclaimed) { 633 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n", 634 tid_data->agg.ssn); 635 tid_data->agg.state = IWL_AGG_STARTING; 636 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 637 } else { 638 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, " 639 "next_reclaimed = %d\n", 640 tid_data->agg.ssn, 641 tid_data->next_reclaimed); 642 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; 643 } 644 spin_unlock_bh(&priv->sta_lock); 645 646 return ret; 647 } 648 649 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif, 650 struct ieee80211_sta *sta, u16 tid) 651 { 652 struct iwl_tid_data *tid_data; 653 enum iwl_agg_state agg_state; 654 int sta_id, txq_id; 655 sta_id = iwl_sta_id(sta); 656 657 /* 658 * First set the agg state to OFF to avoid calling 659 * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty. 660 */ 661 spin_lock_bh(&priv->sta_lock); 662 663 tid_data = &priv->tid_data[sta_id][tid]; 664 txq_id = tid_data->agg.txq_id; 665 agg_state = tid_data->agg.state; 666 IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n", 667 sta_id, tid, txq_id, tid_data->agg.state); 668 669 tid_data->agg.state = IWL_AGG_OFF; 670 671 spin_unlock_bh(&priv->sta_lock); 672 673 if (iwlagn_txfifo_flush(priv, BIT(txq_id))) 674 IWL_ERR(priv, "Couldn't flush the AGG queue\n"); 675 676 if (test_bit(txq_id, priv->agg_q_alloc)) { 677 /* 678 * If the transport didn't know that we wanted to start 679 * agreggation, don't tell it that we want to stop them. 680 * This can happen when we don't get the addBA response on 681 * time, or we hadn't time to drain the AC queues. 682 */ 683 if (agg_state == IWL_AGG_ON) 684 iwl_trans_txq_disable(priv->trans, txq_id, true); 685 else 686 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n", 687 agg_state); 688 iwlagn_dealloc_agg_txq(priv, txq_id); 689 } 690 691 return 0; 692 } 693 694 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif, 695 struct ieee80211_sta *sta, u16 tid, u8 buf_size) 696 { 697 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 698 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 699 int q, fifo; 700 u16 ssn; 701 702 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 703 704 spin_lock_bh(&priv->sta_lock); 705 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn; 706 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id; 707 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON; 708 spin_unlock_bh(&priv->sta_lock); 709 710 fifo = ctx->ac_to_fifo[tid_to_ac[tid]]; 711 712 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid, 713 buf_size, ssn, 0); 714 715 /* 716 * If the limit is 0, then it wasn't initialised yet, 717 * use the default. We can do that since we take the 718 * minimum below, and we don't want to go above our 719 * default due to hardware restrictions. 720 */ 721 if (sta_priv->max_agg_bufsize == 0) 722 sta_priv->max_agg_bufsize = 723 LINK_QUAL_AGG_FRAME_LIMIT_DEF; 724 725 /* 726 * Even though in theory the peer could have different 727 * aggregation reorder buffer sizes for different sessions, 728 * our ucode doesn't allow for that and has a global limit 729 * for each station. Therefore, use the minimum of all the 730 * aggregation sessions and our default value. 731 */ 732 sta_priv->max_agg_bufsize = 733 min(sta_priv->max_agg_bufsize, buf_size); 734 735 if (priv->hw_params.use_rts_for_aggregation) { 736 /* 737 * switch to RTS/CTS if it is the prefer protection 738 * method for HT traffic 739 */ 740 741 sta_priv->lq_sta.lq.general_params.flags |= 742 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 743 } 744 priv->agg_tids_count++; 745 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 746 priv->agg_tids_count); 747 748 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit = 749 sta_priv->max_agg_bufsize; 750 751 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n", 752 sta->addr, tid); 753 754 return iwl_send_lq_cmd(priv, ctx, 755 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 756 } 757 758 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid) 759 { 760 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid]; 761 enum iwl_rxon_context_id ctx; 762 struct ieee80211_vif *vif; 763 u8 *addr; 764 765 lockdep_assert_held(&priv->sta_lock); 766 767 addr = priv->stations[sta_id].sta.sta.addr; 768 ctx = priv->stations[sta_id].ctxid; 769 vif = priv->contexts[ctx].vif; 770 771 switch (priv->tid_data[sta_id][tid].agg.state) { 772 case IWL_EMPTYING_HW_QUEUE_DELBA: 773 /* There are no packets for this RA / TID in the HW any more */ 774 if (tid_data->agg.ssn == tid_data->next_reclaimed) { 775 IWL_DEBUG_TX_QUEUES(priv, 776 "Can continue DELBA flow ssn = next_recl = %d\n", 777 tid_data->next_reclaimed); 778 iwl_trans_txq_disable(priv->trans, 779 tid_data->agg.txq_id, true); 780 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id); 781 tid_data->agg.state = IWL_AGG_OFF; 782 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid); 783 } 784 break; 785 case IWL_EMPTYING_HW_QUEUE_ADDBA: 786 /* There are no packets for this RA / TID in the HW any more */ 787 if (tid_data->agg.ssn == tid_data->next_reclaimed) { 788 IWL_DEBUG_TX_QUEUES(priv, 789 "Can continue ADDBA flow ssn = next_recl = %d\n", 790 tid_data->next_reclaimed); 791 tid_data->agg.state = IWL_AGG_STARTING; 792 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid); 793 } 794 break; 795 default: 796 break; 797 } 798 } 799 800 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv, 801 struct iwl_rxon_context *ctx, 802 const u8 *addr1) 803 { 804 struct ieee80211_sta *sta; 805 struct iwl_station_priv *sta_priv; 806 807 rcu_read_lock(); 808 sta = ieee80211_find_sta(ctx->vif, addr1); 809 if (sta) { 810 sta_priv = (void *)sta->drv_priv; 811 /* avoid atomic ops if this isn't a client */ 812 if (sta_priv->client && 813 atomic_dec_return(&sta_priv->pending_frames) == 0) 814 ieee80211_sta_block_awake(priv->hw, sta, false); 815 } 816 rcu_read_unlock(); 817 } 818 819 /** 820 * translate ucode response to mac80211 tx status control values 821 */ 822 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags, 823 struct ieee80211_tx_info *info) 824 { 825 struct ieee80211_tx_rate *r = &info->status.rates[0]; 826 827 info->status.antenna = 828 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 829 if (rate_n_flags & RATE_MCS_HT_MSK) 830 r->flags |= IEEE80211_TX_RC_MCS; 831 if (rate_n_flags & RATE_MCS_GF_MSK) 832 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 833 if (rate_n_flags & RATE_MCS_HT40_MSK) 834 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 835 if (rate_n_flags & RATE_MCS_DUP_MSK) 836 r->flags |= IEEE80211_TX_RC_DUP_DATA; 837 if (rate_n_flags & RATE_MCS_SGI_MSK) 838 r->flags |= IEEE80211_TX_RC_SHORT_GI; 839 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band); 840 } 841 842 #ifdef CONFIG_IWLWIFI_DEBUG 843 const char *iwl_get_tx_fail_reason(u32 status) 844 { 845 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 846 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 847 848 switch (status & TX_STATUS_MSK) { 849 case TX_STATUS_SUCCESS: 850 return "SUCCESS"; 851 TX_STATUS_POSTPONE(DELAY); 852 TX_STATUS_POSTPONE(FEW_BYTES); 853 TX_STATUS_POSTPONE(BT_PRIO); 854 TX_STATUS_POSTPONE(QUIET_PERIOD); 855 TX_STATUS_POSTPONE(CALC_TTAK); 856 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 857 TX_STATUS_FAIL(SHORT_LIMIT); 858 TX_STATUS_FAIL(LONG_LIMIT); 859 TX_STATUS_FAIL(FIFO_UNDERRUN); 860 TX_STATUS_FAIL(DRAIN_FLOW); 861 TX_STATUS_FAIL(RFKILL_FLUSH); 862 TX_STATUS_FAIL(LIFE_EXPIRE); 863 TX_STATUS_FAIL(DEST_PS); 864 TX_STATUS_FAIL(HOST_ABORTED); 865 TX_STATUS_FAIL(BT_RETRY); 866 TX_STATUS_FAIL(STA_INVALID); 867 TX_STATUS_FAIL(FRAG_DROPPED); 868 TX_STATUS_FAIL(TID_DISABLE); 869 TX_STATUS_FAIL(FIFO_FLUSHED); 870 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); 871 TX_STATUS_FAIL(PASSIVE_NO_RX); 872 TX_STATUS_FAIL(NO_BEACON_ON_RADAR); 873 } 874 875 return "UNKNOWN"; 876 877 #undef TX_STATUS_FAIL 878 #undef TX_STATUS_POSTPONE 879 } 880 #endif /* CONFIG_IWLWIFI_DEBUG */ 881 882 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status) 883 { 884 status &= AGG_TX_STATUS_MSK; 885 886 switch (status) { 887 case AGG_TX_STATE_UNDERRUN_MSK: 888 priv->reply_agg_tx_stats.underrun++; 889 break; 890 case AGG_TX_STATE_BT_PRIO_MSK: 891 priv->reply_agg_tx_stats.bt_prio++; 892 break; 893 case AGG_TX_STATE_FEW_BYTES_MSK: 894 priv->reply_agg_tx_stats.few_bytes++; 895 break; 896 case AGG_TX_STATE_ABORT_MSK: 897 priv->reply_agg_tx_stats.abort++; 898 break; 899 case AGG_TX_STATE_LAST_SENT_TTL_MSK: 900 priv->reply_agg_tx_stats.last_sent_ttl++; 901 break; 902 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK: 903 priv->reply_agg_tx_stats.last_sent_try++; 904 break; 905 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK: 906 priv->reply_agg_tx_stats.last_sent_bt_kill++; 907 break; 908 case AGG_TX_STATE_SCD_QUERY_MSK: 909 priv->reply_agg_tx_stats.scd_query++; 910 break; 911 case AGG_TX_STATE_TEST_BAD_CRC32_MSK: 912 priv->reply_agg_tx_stats.bad_crc32++; 913 break; 914 case AGG_TX_STATE_RESPONSE_MSK: 915 priv->reply_agg_tx_stats.response++; 916 break; 917 case AGG_TX_STATE_DUMP_TX_MSK: 918 priv->reply_agg_tx_stats.dump_tx++; 919 break; 920 case AGG_TX_STATE_DELAY_TX_MSK: 921 priv->reply_agg_tx_stats.delay_tx++; 922 break; 923 default: 924 priv->reply_agg_tx_stats.unknown++; 925 break; 926 } 927 } 928 929 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp) 930 { 931 return le32_to_cpup((__le32 *)&tx_resp->status + 932 tx_resp->frame_count) & IEEE80211_MAX_SN; 933 } 934 935 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv, 936 struct iwlagn_tx_resp *tx_resp) 937 { 938 struct agg_tx_status *frame_status = &tx_resp->status; 939 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> 940 IWLAGN_TX_RES_TID_POS; 941 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> 942 IWLAGN_TX_RES_RA_POS; 943 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg; 944 u32 status = le16_to_cpu(tx_resp->status.status); 945 int i; 946 947 WARN_ON(tid == IWL_TID_NON_QOS); 948 949 if (agg->wait_for_ba) 950 IWL_DEBUG_TX_REPLY(priv, 951 "got tx response w/o block-ack\n"); 952 953 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); 954 agg->wait_for_ba = (tx_resp->frame_count > 1); 955 956 /* 957 * If the BT kill count is non-zero, we'll get this 958 * notification again. 959 */ 960 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 && 961 priv->lib->bt_params && 962 priv->lib->bt_params->advanced_bt_coexist) { 963 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n"); 964 } 965 966 if (tx_resp->frame_count == 1) 967 return; 968 969 IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n", 970 agg->txq_id, 971 le32_to_cpu(tx_resp->rate_n_flags), 972 iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count); 973 974 /* Construct bit-map of pending frames within Tx window */ 975 for (i = 0; i < tx_resp->frame_count; i++) { 976 u16 fstatus = le16_to_cpu(frame_status[i].status); 977 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS; 978 979 if (status & AGG_TX_STATUS_MSK) 980 iwlagn_count_agg_tx_err_status(priv, fstatus); 981 982 if (status & (AGG_TX_STATE_FEW_BYTES_MSK | 983 AGG_TX_STATE_ABORT_MSK)) 984 continue; 985 986 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1) 987 IWL_DEBUG_TX_REPLY(priv, 988 "%d: status %s (0x%04x), try-count (0x%01x)\n", 989 i, 990 iwl_get_agg_tx_fail_reason(fstatus), 991 fstatus & AGG_TX_STATUS_MSK, 992 retry_cnt); 993 } 994 } 995 996 #ifdef CONFIG_IWLWIFI_DEBUG 997 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x 998 999 const char *iwl_get_agg_tx_fail_reason(u16 status) 1000 { 1001 status &= AGG_TX_STATUS_MSK; 1002 switch (status) { 1003 case AGG_TX_STATE_TRANSMITTED: 1004 return "SUCCESS"; 1005 AGG_TX_STATE_FAIL(UNDERRUN_MSK); 1006 AGG_TX_STATE_FAIL(BT_PRIO_MSK); 1007 AGG_TX_STATE_FAIL(FEW_BYTES_MSK); 1008 AGG_TX_STATE_FAIL(ABORT_MSK); 1009 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK); 1010 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK); 1011 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK); 1012 AGG_TX_STATE_FAIL(SCD_QUERY_MSK); 1013 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK); 1014 AGG_TX_STATE_FAIL(RESPONSE_MSK); 1015 AGG_TX_STATE_FAIL(DUMP_TX_MSK); 1016 AGG_TX_STATE_FAIL(DELAY_TX_MSK); 1017 } 1018 1019 return "UNKNOWN"; 1020 } 1021 #endif /* CONFIG_IWLWIFI_DEBUG */ 1022 1023 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status) 1024 { 1025 status &= TX_STATUS_MSK; 1026 1027 switch (status) { 1028 case TX_STATUS_POSTPONE_DELAY: 1029 priv->reply_tx_stats.pp_delay++; 1030 break; 1031 case TX_STATUS_POSTPONE_FEW_BYTES: 1032 priv->reply_tx_stats.pp_few_bytes++; 1033 break; 1034 case TX_STATUS_POSTPONE_BT_PRIO: 1035 priv->reply_tx_stats.pp_bt_prio++; 1036 break; 1037 case TX_STATUS_POSTPONE_QUIET_PERIOD: 1038 priv->reply_tx_stats.pp_quiet_period++; 1039 break; 1040 case TX_STATUS_POSTPONE_CALC_TTAK: 1041 priv->reply_tx_stats.pp_calc_ttak++; 1042 break; 1043 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY: 1044 priv->reply_tx_stats.int_crossed_retry++; 1045 break; 1046 case TX_STATUS_FAIL_SHORT_LIMIT: 1047 priv->reply_tx_stats.short_limit++; 1048 break; 1049 case TX_STATUS_FAIL_LONG_LIMIT: 1050 priv->reply_tx_stats.long_limit++; 1051 break; 1052 case TX_STATUS_FAIL_FIFO_UNDERRUN: 1053 priv->reply_tx_stats.fifo_underrun++; 1054 break; 1055 case TX_STATUS_FAIL_DRAIN_FLOW: 1056 priv->reply_tx_stats.drain_flow++; 1057 break; 1058 case TX_STATUS_FAIL_RFKILL_FLUSH: 1059 priv->reply_tx_stats.rfkill_flush++; 1060 break; 1061 case TX_STATUS_FAIL_LIFE_EXPIRE: 1062 priv->reply_tx_stats.life_expire++; 1063 break; 1064 case TX_STATUS_FAIL_DEST_PS: 1065 priv->reply_tx_stats.dest_ps++; 1066 break; 1067 case TX_STATUS_FAIL_HOST_ABORTED: 1068 priv->reply_tx_stats.host_abort++; 1069 break; 1070 case TX_STATUS_FAIL_BT_RETRY: 1071 priv->reply_tx_stats.bt_retry++; 1072 break; 1073 case TX_STATUS_FAIL_STA_INVALID: 1074 priv->reply_tx_stats.sta_invalid++; 1075 break; 1076 case TX_STATUS_FAIL_FRAG_DROPPED: 1077 priv->reply_tx_stats.frag_drop++; 1078 break; 1079 case TX_STATUS_FAIL_TID_DISABLE: 1080 priv->reply_tx_stats.tid_disable++; 1081 break; 1082 case TX_STATUS_FAIL_FIFO_FLUSHED: 1083 priv->reply_tx_stats.fifo_flush++; 1084 break; 1085 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL: 1086 priv->reply_tx_stats.insuff_cf_poll++; 1087 break; 1088 case TX_STATUS_FAIL_PASSIVE_NO_RX: 1089 priv->reply_tx_stats.fail_hw_drop++; 1090 break; 1091 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR: 1092 priv->reply_tx_stats.sta_color_mismatch++; 1093 break; 1094 default: 1095 priv->reply_tx_stats.unknown++; 1096 break; 1097 } 1098 } 1099 1100 static void iwlagn_set_tx_status(struct iwl_priv *priv, 1101 struct ieee80211_tx_info *info, 1102 struct iwlagn_tx_resp *tx_resp) 1103 { 1104 u16 status = le16_to_cpu(tx_resp->status.status); 1105 1106 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1107 1108 info->status.rates[0].count = tx_resp->failure_frame + 1; 1109 info->flags |= iwl_tx_status_to_mac80211(status); 1110 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags), 1111 info); 1112 if (!iwl_is_tx_success(status)) 1113 iwlagn_count_tx_err_status(priv, status); 1114 } 1115 1116 static void iwl_check_abort_status(struct iwl_priv *priv, 1117 u8 frame_count, u32 status) 1118 { 1119 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { 1120 IWL_ERR(priv, "Tx flush command to flush out all frames\n"); 1121 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) 1122 queue_work(priv->workqueue, &priv->tx_flush); 1123 } 1124 } 1125 1126 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb) 1127 { 1128 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1129 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1130 int txq_id = SEQ_TO_QUEUE(sequence); 1131 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence); 1132 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data; 1133 struct ieee80211_hdr *hdr; 1134 u32 status = le16_to_cpu(tx_resp->status.status); 1135 u16 ssn = iwlagn_get_scd_ssn(tx_resp); 1136 int tid; 1137 int sta_id; 1138 int freed; 1139 struct ieee80211_tx_info *info; 1140 struct sk_buff_head skbs; 1141 struct sk_buff *skb; 1142 struct iwl_rxon_context *ctx; 1143 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE); 1144 1145 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> 1146 IWLAGN_TX_RES_TID_POS; 1147 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> 1148 IWLAGN_TX_RES_RA_POS; 1149 1150 spin_lock_bh(&priv->sta_lock); 1151 1152 if (is_agg) { 1153 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT || 1154 tid >= IWL_MAX_TID_COUNT); 1155 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id) 1156 IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id, 1157 priv->tid_data[sta_id][tid].agg.txq_id); 1158 iwl_rx_reply_tx_agg(priv, tx_resp); 1159 } 1160 1161 __skb_queue_head_init(&skbs); 1162 1163 if (tx_resp->frame_count == 1) { 1164 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl); 1165 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10); 1166 1167 if (is_agg) { 1168 /* If this is an aggregation queue, we can rely on the 1169 * ssn since the wifi sequence number corresponds to 1170 * the index in the TFD ring (%256). 1171 * The seq_ctl is the sequence control of the packet 1172 * to which this Tx response relates. But if there is a 1173 * hole in the bitmap of the BA we received, this Tx 1174 * response may allow to reclaim the hole and all the 1175 * subsequent packets that were already acked. 1176 * In that case, seq_ctl != ssn, and the next packet 1177 * to be reclaimed will be ssn and not seq_ctl. 1178 */ 1179 next_reclaimed = ssn; 1180 } 1181 1182 if (tid != IWL_TID_NON_QOS) { 1183 priv->tid_data[sta_id][tid].next_reclaimed = 1184 next_reclaimed; 1185 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n", 1186 next_reclaimed); 1187 iwlagn_check_ratid_empty(priv, sta_id, tid); 1188 } 1189 1190 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs); 1191 1192 freed = 0; 1193 1194 /* process frames */ 1195 skb_queue_walk(&skbs, skb) { 1196 hdr = (struct ieee80211_hdr *)skb->data; 1197 1198 if (!ieee80211_is_data_qos(hdr->frame_control)) 1199 priv->last_seq_ctl = tx_resp->seq_ctl; 1200 1201 info = IEEE80211_SKB_CB(skb); 1202 ctx = info->driver_data[0]; 1203 iwl_trans_free_tx_cmd(priv->trans, 1204 info->driver_data[1]); 1205 1206 memset(&info->status, 0, sizeof(info->status)); 1207 1208 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX && 1209 ctx->vif && 1210 ctx->vif->type == NL80211_IFTYPE_STATION) { 1211 /* block and stop all queues */ 1212 priv->passive_no_rx = true; 1213 IWL_DEBUG_TX_QUEUES(priv, 1214 "stop all queues: passive channel\n"); 1215 ieee80211_stop_queues(priv->hw); 1216 1217 IWL_DEBUG_TX_REPLY(priv, 1218 "TXQ %d status %s (0x%08x) " 1219 "rate_n_flags 0x%x retries %d\n", 1220 txq_id, 1221 iwl_get_tx_fail_reason(status), 1222 status, 1223 le32_to_cpu(tx_resp->rate_n_flags), 1224 tx_resp->failure_frame); 1225 1226 IWL_DEBUG_TX_REPLY(priv, 1227 "FrameCnt = %d, idx=%d\n", 1228 tx_resp->frame_count, cmd_index); 1229 } 1230 1231 /* check if BAR is needed */ 1232 if (is_agg && !iwl_is_tx_success(status)) 1233 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1234 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb), 1235 tx_resp); 1236 if (!is_agg) 1237 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1); 1238 1239 freed++; 1240 } 1241 1242 if (tid != IWL_TID_NON_QOS) { 1243 priv->tid_data[sta_id][tid].next_reclaimed = 1244 next_reclaimed; 1245 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n", 1246 next_reclaimed); 1247 } 1248 1249 if (!is_agg && freed != 1) 1250 IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed); 1251 1252 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id, 1253 iwl_get_tx_fail_reason(status), status); 1254 1255 IWL_DEBUG_TX_REPLY(priv, 1256 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n", 1257 le32_to_cpu(tx_resp->rate_n_flags), 1258 tx_resp->failure_frame, 1259 SEQ_TO_INDEX(sequence), ssn, 1260 le16_to_cpu(tx_resp->seq_ctl)); 1261 } 1262 1263 iwl_check_abort_status(priv, tx_resp->frame_count, status); 1264 spin_unlock_bh(&priv->sta_lock); 1265 1266 while (!skb_queue_empty(&skbs)) { 1267 skb = __skb_dequeue(&skbs); 1268 ieee80211_tx_status(priv->hw, skb); 1269 } 1270 } 1271 1272 /** 1273 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA 1274 * 1275 * Handles block-acknowledge notification from device, which reports success 1276 * of frames sent via aggregation. 1277 */ 1278 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv, 1279 struct iwl_rx_cmd_buffer *rxb) 1280 { 1281 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1282 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data; 1283 struct iwl_ht_agg *agg; 1284 struct sk_buff_head reclaimed_skbs; 1285 struct sk_buff *skb; 1286 int sta_id; 1287 int tid; 1288 int freed; 1289 1290 /* "flow" corresponds to Tx queue */ 1291 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 1292 1293 /* "ssn" is start of block-ack Tx window, corresponds to index 1294 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1295 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); 1296 1297 if (scd_flow >= priv->cfg->base_params->num_of_queues) { 1298 IWL_ERR(priv, 1299 "BUG_ON scd_flow is bigger than number of queues\n"); 1300 return; 1301 } 1302 1303 sta_id = ba_resp->sta_id; 1304 tid = ba_resp->tid; 1305 agg = &priv->tid_data[sta_id][tid].agg; 1306 1307 spin_lock_bh(&priv->sta_lock); 1308 1309 if (unlikely(!agg->wait_for_ba)) { 1310 if (unlikely(ba_resp->bitmap)) 1311 IWL_ERR(priv, "Received BA when not expected\n"); 1312 spin_unlock_bh(&priv->sta_lock); 1313 return; 1314 } 1315 1316 if (unlikely(scd_flow != agg->txq_id)) { 1317 /* 1318 * FIXME: this is a uCode bug which need to be addressed, 1319 * log the information and return for now. 1320 * Since it is can possibly happen very often and in order 1321 * not to fill the syslog, don't use IWL_ERR or IWL_WARN 1322 */ 1323 IWL_DEBUG_TX_QUEUES(priv, 1324 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n", 1325 scd_flow, sta_id, tid, agg->txq_id); 1326 spin_unlock_bh(&priv->sta_lock); 1327 return; 1328 } 1329 1330 __skb_queue_head_init(&reclaimed_skbs); 1331 1332 /* Release all TFDs before the SSN, i.e. all TFDs in front of 1333 * block-ack window (we assume that they've been successfully 1334 * transmitted ... if not, it's too late anyway). */ 1335 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn, 1336 &reclaimed_skbs); 1337 1338 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " 1339 "sta_id = %d\n", 1340 agg->wait_for_ba, 1341 (u8 *) &ba_resp->sta_addr_lo32, 1342 ba_resp->sta_id); 1343 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, " 1344 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1345 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl), 1346 (unsigned long long)le64_to_cpu(ba_resp->bitmap), 1347 scd_flow, ba_resp_scd_ssn, ba_resp->txed, 1348 ba_resp->txed_2_done); 1349 1350 /* Mark that the expected block-ack response arrived */ 1351 agg->wait_for_ba = false; 1352 1353 /* Sanity check values reported by uCode */ 1354 if (ba_resp->txed_2_done > ba_resp->txed) { 1355 IWL_DEBUG_TX_REPLY(priv, 1356 "bogus sent(%d) and ack(%d) count\n", 1357 ba_resp->txed, ba_resp->txed_2_done); 1358 /* 1359 * set txed_2_done = txed, 1360 * so it won't impact rate scale 1361 */ 1362 ba_resp->txed = ba_resp->txed_2_done; 1363 } 1364 1365 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn; 1366 1367 iwlagn_check_ratid_empty(priv, sta_id, tid); 1368 freed = 0; 1369 1370 skb_queue_walk(&reclaimed_skbs, skb) { 1371 struct ieee80211_hdr *hdr = (void *)skb->data; 1372 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1373 1374 if (ieee80211_is_data_qos(hdr->frame_control)) 1375 freed++; 1376 else 1377 WARN_ON_ONCE(1); 1378 1379 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]); 1380 1381 memset(&info->status, 0, sizeof(info->status)); 1382 /* Packet was transmitted successfully, failures come as single 1383 * frames because before failing a frame the firmware transmits 1384 * it without aggregation at least once. 1385 */ 1386 info->flags |= IEEE80211_TX_STAT_ACK; 1387 1388 if (freed == 1) { 1389 /* this is the first skb we deliver in this batch */ 1390 /* put the rate scaling data there */ 1391 info = IEEE80211_SKB_CB(skb); 1392 memset(&info->status, 0, sizeof(info->status)); 1393 info->flags |= IEEE80211_TX_STAT_AMPDU; 1394 info->status.ampdu_ack_len = ba_resp->txed_2_done; 1395 info->status.ampdu_len = ba_resp->txed; 1396 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags, 1397 info); 1398 } 1399 } 1400 1401 spin_unlock_bh(&priv->sta_lock); 1402 1403 while (!skb_queue_empty(&reclaimed_skbs)) { 1404 skb = __skb_dequeue(&reclaimed_skbs); 1405 ieee80211_tx_status(priv->hw, skb); 1406 } 1407 } 1408