1 // SPDX-License-Identifier: GPL-2.0-only 2 /****************************************************************************** 3 * 4 * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved. 5 * Copyright (C) 2019 Intel Corporation 6 * 7 * Contact Information: 8 * Intel Linux Wireless <linuxwifi@intel.com> 9 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 10 * 11 *****************************************************************************/ 12 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/sched.h> 16 #include <linux/ieee80211.h> 17 #include "iwl-io.h" 18 #include "iwl-trans.h" 19 #include "iwl-agn-hw.h" 20 #include "dev.h" 21 #include "agn.h" 22 23 static const u8 tid_to_ac[] = { 24 IEEE80211_AC_BE, 25 IEEE80211_AC_BK, 26 IEEE80211_AC_BK, 27 IEEE80211_AC_BE, 28 IEEE80211_AC_VI, 29 IEEE80211_AC_VI, 30 IEEE80211_AC_VO, 31 IEEE80211_AC_VO, 32 }; 33 34 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv, 35 struct ieee80211_tx_info *info, 36 __le16 fc, __le32 *tx_flags) 37 { 38 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS || 39 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT || 40 info->flags & IEEE80211_TX_CTL_AMPDU) 41 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; 42 } 43 44 /* 45 * handle build REPLY_TX command notification. 46 */ 47 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv, 48 struct sk_buff *skb, 49 struct iwl_tx_cmd *tx_cmd, 50 struct ieee80211_tx_info *info, 51 struct ieee80211_hdr *hdr, u8 sta_id) 52 { 53 __le16 fc = hdr->frame_control; 54 __le32 tx_flags = tx_cmd->tx_flags; 55 56 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; 57 58 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 59 tx_flags |= TX_CMD_FLG_ACK_MSK; 60 else 61 tx_flags &= ~TX_CMD_FLG_ACK_MSK; 62 63 if (ieee80211_is_probe_resp(fc)) 64 tx_flags |= TX_CMD_FLG_TSF_MSK; 65 else if (ieee80211_is_back_req(fc)) 66 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; 67 else if (info->band == NL80211_BAND_2GHZ && 68 priv->lib->bt_params && 69 priv->lib->bt_params->advanced_bt_coexist && 70 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) || 71 ieee80211_is_reassoc_req(fc) || 72 info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO)) 73 tx_flags |= TX_CMD_FLG_IGNORE_BT; 74 75 76 tx_cmd->sta_id = sta_id; 77 if (ieee80211_has_morefrags(fc)) 78 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; 79 80 if (ieee80211_is_data_qos(fc)) { 81 u8 *qc = ieee80211_get_qos_ctl(hdr); 82 tx_cmd->tid_tspec = qc[0] & 0xf; 83 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; 84 } else { 85 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 86 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 87 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; 88 else 89 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; 90 } 91 92 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags); 93 94 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); 95 if (ieee80211_is_mgmt(fc)) { 96 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 97 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); 98 else 99 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); 100 } else { 101 tx_cmd->timeout.pm_frame_timeout = 0; 102 } 103 104 tx_cmd->driver_txop = 0; 105 tx_cmd->tx_flags = tx_flags; 106 tx_cmd->next_frame_len = 0; 107 } 108 109 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv, 110 struct iwl_tx_cmd *tx_cmd, 111 struct ieee80211_tx_info *info, 112 struct ieee80211_sta *sta, 113 __le16 fc) 114 { 115 u32 rate_flags; 116 int rate_idx; 117 u8 rts_retry_limit; 118 u8 data_retry_limit; 119 u8 rate_plcp; 120 121 if (priv->wowlan) { 122 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT; 123 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT; 124 } else { 125 /* Set retry limit on RTS packets */ 126 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT; 127 128 /* Set retry limit on DATA packets and Probe Responses*/ 129 if (ieee80211_is_probe_resp(fc)) { 130 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT; 131 rts_retry_limit = 132 min(data_retry_limit, rts_retry_limit); 133 } else if (ieee80211_is_back_req(fc)) 134 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT; 135 else 136 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY; 137 } 138 139 tx_cmd->data_retry_limit = data_retry_limit; 140 tx_cmd->rts_retry_limit = rts_retry_limit; 141 142 /* DATA packets will use the uCode station table for rate/antenna 143 * selection */ 144 if (ieee80211_is_data(fc)) { 145 tx_cmd->initial_rate_index = 0; 146 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; 147 return; 148 } else if (ieee80211_is_back_req(fc)) 149 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; 150 151 /** 152 * If the current TX rate stored in mac80211 has the MCS bit set, it's 153 * not really a TX rate. Thus, we use the lowest supported rate for 154 * this band. Also use the lowest supported rate if the stored rate 155 * index is invalid. 156 */ 157 rate_idx = info->control.rates[0].idx; 158 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS || 159 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY)) 160 rate_idx = rate_lowest_index( 161 &priv->nvm_data->bands[info->band], sta); 162 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 163 if (info->band == NL80211_BAND_5GHZ) 164 rate_idx += IWL_FIRST_OFDM_RATE; 165 /* Get PLCP rate for tx_cmd->rate_n_flags */ 166 rate_plcp = iwl_rates[rate_idx].plcp; 167 /* Zero out flags for this packet */ 168 rate_flags = 0; 169 170 /* Set CCK flag as needed */ 171 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 172 rate_flags |= RATE_MCS_CCK_MSK; 173 174 /* Set up antennas */ 175 if (priv->lib->bt_params && 176 priv->lib->bt_params->advanced_bt_coexist && 177 priv->bt_full_concurrent) { 178 /* operated as 1x1 in full concurrency mode */ 179 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, 180 first_antenna(priv->nvm_data->valid_tx_ant)); 181 } else 182 priv->mgmt_tx_ant = iwl_toggle_tx_ant( 183 priv, priv->mgmt_tx_ant, 184 priv->nvm_data->valid_tx_ant); 185 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant); 186 187 /* Set the rate in the TX cmd */ 188 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags); 189 } 190 191 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv, 192 struct ieee80211_tx_info *info, 193 struct iwl_tx_cmd *tx_cmd, 194 struct sk_buff *skb_frag) 195 { 196 struct ieee80211_key_conf *keyconf = info->control.hw_key; 197 198 switch (keyconf->cipher) { 199 case WLAN_CIPHER_SUITE_CCMP: 200 tx_cmd->sec_ctl = TX_CMD_SEC_CCM; 201 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); 202 if (info->flags & IEEE80211_TX_CTL_AMPDU) 203 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; 204 break; 205 206 case WLAN_CIPHER_SUITE_TKIP: 207 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 208 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 209 break; 210 211 case WLAN_CIPHER_SUITE_WEP104: 212 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 213 /* fall through */ 214 case WLAN_CIPHER_SUITE_WEP40: 215 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP | 216 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT); 217 218 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 219 220 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " 221 "with key %d\n", keyconf->keyidx); 222 break; 223 224 default: 225 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher); 226 break; 227 } 228 } 229 230 /** 231 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta 232 * @context: the current context 233 * @sta: mac80211 station 234 * 235 * In certain circumstances mac80211 passes a station pointer 236 * that may be %NULL, for example during TX or key setup. In 237 * that case, we need to use the broadcast station, so this 238 * inline wraps that pattern. 239 */ 240 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context, 241 struct ieee80211_sta *sta) 242 { 243 int sta_id; 244 245 if (!sta) 246 return context->bcast_sta_id; 247 248 sta_id = iwl_sta_id(sta); 249 250 /* 251 * mac80211 should not be passing a partially 252 * initialised station! 253 */ 254 WARN_ON(sta_id == IWL_INVALID_STATION); 255 256 return sta_id; 257 } 258 259 /* 260 * start REPLY_TX command process 261 */ 262 int iwlagn_tx_skb(struct iwl_priv *priv, 263 struct ieee80211_sta *sta, 264 struct sk_buff *skb) 265 { 266 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 267 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 268 struct iwl_station_priv *sta_priv = NULL; 269 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 270 struct iwl_device_cmd *dev_cmd; 271 struct iwl_tx_cmd *tx_cmd; 272 __le16 fc; 273 u8 hdr_len; 274 u16 len, seq_number = 0; 275 u8 sta_id, tid = IWL_MAX_TID_COUNT; 276 bool is_agg = false, is_data_qos = false; 277 int txq_id; 278 279 if (info->control.vif) 280 ctx = iwl_rxon_ctx_from_vif(info->control.vif); 281 282 if (iwl_is_rfkill(priv)) { 283 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); 284 goto drop_unlock_priv; 285 } 286 287 fc = hdr->frame_control; 288 289 #ifdef CONFIG_IWLWIFI_DEBUG 290 if (ieee80211_is_auth(fc)) 291 IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); 292 else if (ieee80211_is_assoc_req(fc)) 293 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); 294 else if (ieee80211_is_reassoc_req(fc)) 295 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); 296 #endif 297 298 if (unlikely(ieee80211_is_probe_resp(fc))) { 299 struct iwl_wipan_noa_data *noa_data = 300 rcu_dereference(priv->noa_data); 301 302 if (noa_data && 303 pskb_expand_head(skb, 0, noa_data->length, 304 GFP_ATOMIC) == 0) { 305 skb_put_data(skb, noa_data->data, noa_data->length); 306 hdr = (struct ieee80211_hdr *)skb->data; 307 } 308 } 309 310 hdr_len = ieee80211_hdrlen(fc); 311 312 /* For management frames use broadcast id to do not break aggregation */ 313 if (!ieee80211_is_data(fc)) 314 sta_id = ctx->bcast_sta_id; 315 else { 316 /* Find index into station table for destination station */ 317 sta_id = iwl_sta_id_or_broadcast(ctx, sta); 318 if (sta_id == IWL_INVALID_STATION) { 319 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", 320 hdr->addr1); 321 goto drop_unlock_priv; 322 } 323 } 324 325 if (sta) 326 sta_priv = (void *)sta->drv_priv; 327 328 if (sta_priv && sta_priv->asleep && 329 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) { 330 /* 331 * This sends an asynchronous command to the device, 332 * but we can rely on it being processed before the 333 * next frame is processed -- and the next frame to 334 * this station is the one that will consume this 335 * counter. 336 * For now set the counter to just 1 since we do not 337 * support uAPSD yet. 338 * 339 * FIXME: If we get two non-bufferable frames one 340 * after the other, we might only send out one of 341 * them because this is racy. 342 */ 343 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1); 344 } 345 346 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans); 347 348 if (unlikely(!dev_cmd)) 349 goto drop_unlock_priv; 350 351 memset(dev_cmd, 0, sizeof(*dev_cmd)); 352 dev_cmd->hdr.cmd = REPLY_TX; 353 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload; 354 355 /* Total # bytes to be transmitted */ 356 len = (u16)skb->len; 357 tx_cmd->len = cpu_to_le16(len); 358 359 if (info->control.hw_key) 360 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb); 361 362 /* TODO need this for burst mode later on */ 363 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id); 364 365 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc); 366 367 memset(&info->status, 0, sizeof(info->status)); 368 memset(info->driver_data, 0, sizeof(info->driver_data)); 369 370 info->driver_data[0] = ctx; 371 info->driver_data[1] = dev_cmd; 372 /* From now on, we cannot access info->control */ 373 374 spin_lock(&priv->sta_lock); 375 376 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 377 u8 *qc = NULL; 378 struct iwl_tid_data *tid_data; 379 qc = ieee80211_get_qos_ctl(hdr); 380 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 381 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 382 goto drop_unlock_sta; 383 tid_data = &priv->tid_data[sta_id][tid]; 384 385 /* aggregation is on for this <sta,tid> */ 386 if (info->flags & IEEE80211_TX_CTL_AMPDU && 387 tid_data->agg.state != IWL_AGG_ON) { 388 IWL_ERR(priv, 389 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n", 390 info->flags, tid_data->agg.state); 391 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n", 392 sta_id, tid, 393 IEEE80211_SEQ_TO_SN(tid_data->seq_number)); 394 goto drop_unlock_sta; 395 } 396 397 /* We can receive packets from the stack in IWL_AGG_{ON,OFF} 398 * only. Check this here. 399 */ 400 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON && 401 tid_data->agg.state != IWL_AGG_OFF, 402 "Tx while agg.state = %d\n", tid_data->agg.state)) 403 goto drop_unlock_sta; 404 405 seq_number = tid_data->seq_number; 406 seq_number &= IEEE80211_SCTL_SEQ; 407 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 408 hdr->seq_ctrl |= cpu_to_le16(seq_number); 409 seq_number += 0x10; 410 411 if (info->flags & IEEE80211_TX_CTL_AMPDU) 412 is_agg = true; 413 is_data_qos = true; 414 } 415 416 /* Copy MAC header from skb into command buffer */ 417 memcpy(tx_cmd->hdr, hdr, hdr_len); 418 419 txq_id = info->hw_queue; 420 421 if (is_agg) 422 txq_id = priv->tid_data[sta_id][tid].agg.txq_id; 423 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { 424 /* 425 * The microcode will clear the more data 426 * bit in the last frame it transmits. 427 */ 428 hdr->frame_control |= 429 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 430 } 431 432 WARN_ON_ONCE(is_agg && 433 priv->queue_to_mac80211[txq_id] != info->hw_queue); 434 435 IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid, 436 txq_id, seq_number); 437 438 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id)) 439 goto drop_unlock_sta; 440 441 if (is_data_qos && !ieee80211_has_morefrags(fc)) 442 priv->tid_data[sta_id][tid].seq_number = seq_number; 443 444 spin_unlock(&priv->sta_lock); 445 446 /* 447 * Avoid atomic ops if it isn't an associated client. 448 * Also, if this is a packet for aggregation, don't 449 * increase the counter because the ucode will stop 450 * aggregation queues when their respective station 451 * goes to sleep. 452 */ 453 if (sta_priv && sta_priv->client && !is_agg) 454 atomic_inc(&sta_priv->pending_frames); 455 456 return 0; 457 458 drop_unlock_sta: 459 if (dev_cmd) 460 iwl_trans_free_tx_cmd(priv->trans, dev_cmd); 461 spin_unlock(&priv->sta_lock); 462 drop_unlock_priv: 463 return -1; 464 } 465 466 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq) 467 { 468 int q; 469 470 for (q = IWLAGN_FIRST_AMPDU_QUEUE; 471 q < priv->trans->trans_cfg->base_params->num_of_queues; q++) { 472 if (!test_and_set_bit(q, priv->agg_q_alloc)) { 473 priv->queue_to_mac80211[q] = mq; 474 return q; 475 } 476 } 477 478 return -ENOSPC; 479 } 480 481 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q) 482 { 483 clear_bit(q, priv->agg_q_alloc); 484 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE; 485 } 486 487 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif, 488 struct ieee80211_sta *sta, u16 tid) 489 { 490 struct iwl_tid_data *tid_data; 491 int sta_id, txq_id; 492 enum iwl_agg_state agg_state; 493 494 sta_id = iwl_sta_id(sta); 495 496 if (sta_id == IWL_INVALID_STATION) { 497 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); 498 return -ENXIO; 499 } 500 501 spin_lock_bh(&priv->sta_lock); 502 503 tid_data = &priv->tid_data[sta_id][tid]; 504 txq_id = tid_data->agg.txq_id; 505 506 switch (tid_data->agg.state) { 507 case IWL_EMPTYING_HW_QUEUE_ADDBA: 508 /* 509 * This can happen if the peer stops aggregation 510 * again before we've had a chance to drain the 511 * queue we selected previously, i.e. before the 512 * session was really started completely. 513 */ 514 IWL_DEBUG_HT(priv, "AGG stop before setup done\n"); 515 goto turn_off; 516 case IWL_AGG_STARTING: 517 /* 518 * This can happen when the session is stopped before 519 * we receive ADDBA response 520 */ 521 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n"); 522 goto turn_off; 523 case IWL_AGG_ON: 524 break; 525 default: 526 IWL_WARN(priv, 527 "Stopping AGG while state not ON or starting for %d on %d (%d)\n", 528 sta_id, tid, tid_data->agg.state); 529 spin_unlock_bh(&priv->sta_lock); 530 return 0; 531 } 532 533 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 534 535 /* There are still packets for this RA / TID in the HW */ 536 if (!test_bit(txq_id, priv->agg_q_alloc)) { 537 IWL_DEBUG_TX_QUEUES(priv, 538 "stopping AGG on STA/TID %d/%d but hwq %d not used\n", 539 sta_id, tid, txq_id); 540 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) { 541 IWL_DEBUG_TX_QUEUES(priv, 542 "Can't proceed: ssn %d, next_recl = %d\n", 543 tid_data->agg.ssn, 544 tid_data->next_reclaimed); 545 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA; 546 spin_unlock_bh(&priv->sta_lock); 547 return 0; 548 } 549 550 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n", 551 tid_data->agg.ssn); 552 turn_off: 553 agg_state = tid_data->agg.state; 554 tid_data->agg.state = IWL_AGG_OFF; 555 556 spin_unlock_bh(&priv->sta_lock); 557 558 if (test_bit(txq_id, priv->agg_q_alloc)) { 559 /* 560 * If the transport didn't know that we wanted to start 561 * agreggation, don't tell it that we want to stop them. 562 * This can happen when we don't get the addBA response on 563 * time, or we hadn't time to drain the AC queues. 564 */ 565 if (agg_state == IWL_AGG_ON) 566 iwl_trans_txq_disable(priv->trans, txq_id, true); 567 else 568 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n", 569 agg_state); 570 iwlagn_dealloc_agg_txq(priv, txq_id); 571 } 572 573 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 574 575 return 0; 576 } 577 578 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif, 579 struct ieee80211_sta *sta, u16 tid, u16 *ssn) 580 { 581 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 582 struct iwl_tid_data *tid_data; 583 int sta_id, txq_id, ret; 584 585 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n", 586 sta->addr, tid); 587 588 sta_id = iwl_sta_id(sta); 589 if (sta_id == IWL_INVALID_STATION) { 590 IWL_ERR(priv, "Start AGG on invalid station\n"); 591 return -ENXIO; 592 } 593 if (unlikely(tid >= IWL_MAX_TID_COUNT)) 594 return -EINVAL; 595 596 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) { 597 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); 598 return -ENXIO; 599 } 600 601 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]); 602 if (txq_id < 0) { 603 IWL_DEBUG_TX_QUEUES(priv, 604 "No free aggregation queue for %pM/%d\n", 605 sta->addr, tid); 606 return txq_id; 607 } 608 609 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); 610 if (ret) 611 return ret; 612 613 spin_lock_bh(&priv->sta_lock); 614 tid_data = &priv->tid_data[sta_id][tid]; 615 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); 616 tid_data->agg.txq_id = txq_id; 617 618 *ssn = tid_data->agg.ssn; 619 620 if (*ssn == tid_data->next_reclaimed) { 621 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n", 622 tid_data->agg.ssn); 623 tid_data->agg.state = IWL_AGG_STARTING; 624 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE; 625 } else { 626 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, " 627 "next_reclaimed = %d\n", 628 tid_data->agg.ssn, 629 tid_data->next_reclaimed); 630 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; 631 } 632 spin_unlock_bh(&priv->sta_lock); 633 634 return ret; 635 } 636 637 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif, 638 struct ieee80211_sta *sta, u16 tid) 639 { 640 struct iwl_tid_data *tid_data; 641 enum iwl_agg_state agg_state; 642 int sta_id, txq_id; 643 sta_id = iwl_sta_id(sta); 644 645 /* 646 * First set the agg state to OFF to avoid calling 647 * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty. 648 */ 649 spin_lock_bh(&priv->sta_lock); 650 651 tid_data = &priv->tid_data[sta_id][tid]; 652 txq_id = tid_data->agg.txq_id; 653 agg_state = tid_data->agg.state; 654 IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n", 655 sta_id, tid, txq_id, tid_data->agg.state); 656 657 tid_data->agg.state = IWL_AGG_OFF; 658 659 spin_unlock_bh(&priv->sta_lock); 660 661 if (iwlagn_txfifo_flush(priv, BIT(txq_id))) 662 IWL_ERR(priv, "Couldn't flush the AGG queue\n"); 663 664 if (test_bit(txq_id, priv->agg_q_alloc)) { 665 /* 666 * If the transport didn't know that we wanted to start 667 * agreggation, don't tell it that we want to stop them. 668 * This can happen when we don't get the addBA response on 669 * time, or we hadn't time to drain the AC queues. 670 */ 671 if (agg_state == IWL_AGG_ON) 672 iwl_trans_txq_disable(priv->trans, txq_id, true); 673 else 674 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n", 675 agg_state); 676 iwlagn_dealloc_agg_txq(priv, txq_id); 677 } 678 679 return 0; 680 } 681 682 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif, 683 struct ieee80211_sta *sta, u16 tid, u8 buf_size) 684 { 685 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 686 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 687 int q, fifo; 688 u16 ssn; 689 690 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); 691 692 spin_lock_bh(&priv->sta_lock); 693 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn; 694 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id; 695 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON; 696 spin_unlock_bh(&priv->sta_lock); 697 698 fifo = ctx->ac_to_fifo[tid_to_ac[tid]]; 699 700 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid, 701 buf_size, ssn, 0); 702 703 /* 704 * If the limit is 0, then it wasn't initialised yet, 705 * use the default. We can do that since we take the 706 * minimum below, and we don't want to go above our 707 * default due to hardware restrictions. 708 */ 709 if (sta_priv->max_agg_bufsize == 0) 710 sta_priv->max_agg_bufsize = 711 LINK_QUAL_AGG_FRAME_LIMIT_DEF; 712 713 /* 714 * Even though in theory the peer could have different 715 * aggregation reorder buffer sizes for different sessions, 716 * our ucode doesn't allow for that and has a global limit 717 * for each station. Therefore, use the minimum of all the 718 * aggregation sessions and our default value. 719 */ 720 sta_priv->max_agg_bufsize = 721 min(sta_priv->max_agg_bufsize, buf_size); 722 723 if (priv->hw_params.use_rts_for_aggregation) { 724 /* 725 * switch to RTS/CTS if it is the prefer protection 726 * method for HT traffic 727 */ 728 729 sta_priv->lq_sta.lq.general_params.flags |= 730 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 731 } 732 priv->agg_tids_count++; 733 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 734 priv->agg_tids_count); 735 736 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit = 737 sta_priv->max_agg_bufsize; 738 739 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n", 740 sta->addr, tid); 741 742 return iwl_send_lq_cmd(priv, ctx, 743 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 744 } 745 746 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid) 747 { 748 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid]; 749 enum iwl_rxon_context_id ctx; 750 struct ieee80211_vif *vif; 751 u8 *addr; 752 753 lockdep_assert_held(&priv->sta_lock); 754 755 addr = priv->stations[sta_id].sta.sta.addr; 756 ctx = priv->stations[sta_id].ctxid; 757 vif = priv->contexts[ctx].vif; 758 759 switch (priv->tid_data[sta_id][tid].agg.state) { 760 case IWL_EMPTYING_HW_QUEUE_DELBA: 761 /* There are no packets for this RA / TID in the HW any more */ 762 if (tid_data->agg.ssn == tid_data->next_reclaimed) { 763 IWL_DEBUG_TX_QUEUES(priv, 764 "Can continue DELBA flow ssn = next_recl = %d\n", 765 tid_data->next_reclaimed); 766 iwl_trans_txq_disable(priv->trans, 767 tid_data->agg.txq_id, true); 768 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id); 769 tid_data->agg.state = IWL_AGG_OFF; 770 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid); 771 } 772 break; 773 case IWL_EMPTYING_HW_QUEUE_ADDBA: 774 /* There are no packets for this RA / TID in the HW any more */ 775 if (tid_data->agg.ssn == tid_data->next_reclaimed) { 776 IWL_DEBUG_TX_QUEUES(priv, 777 "Can continue ADDBA flow ssn = next_recl = %d\n", 778 tid_data->next_reclaimed); 779 tid_data->agg.state = IWL_AGG_STARTING; 780 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid); 781 } 782 break; 783 default: 784 break; 785 } 786 } 787 788 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv, 789 struct iwl_rxon_context *ctx, 790 const u8 *addr1) 791 { 792 struct ieee80211_sta *sta; 793 struct iwl_station_priv *sta_priv; 794 795 rcu_read_lock(); 796 sta = ieee80211_find_sta(ctx->vif, addr1); 797 if (sta) { 798 sta_priv = (void *)sta->drv_priv; 799 /* avoid atomic ops if this isn't a client */ 800 if (sta_priv->client && 801 atomic_dec_return(&sta_priv->pending_frames) == 0) 802 ieee80211_sta_block_awake(priv->hw, sta, false); 803 } 804 rcu_read_unlock(); 805 } 806 807 /** 808 * translate ucode response to mac80211 tx status control values 809 */ 810 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags, 811 struct ieee80211_tx_info *info) 812 { 813 struct ieee80211_tx_rate *r = &info->status.rates[0]; 814 815 info->status.antenna = 816 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 817 if (rate_n_flags & RATE_MCS_HT_MSK) 818 r->flags |= IEEE80211_TX_RC_MCS; 819 if (rate_n_flags & RATE_MCS_GF_MSK) 820 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 821 if (rate_n_flags & RATE_MCS_HT40_MSK) 822 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 823 if (rate_n_flags & RATE_MCS_DUP_MSK) 824 r->flags |= IEEE80211_TX_RC_DUP_DATA; 825 if (rate_n_flags & RATE_MCS_SGI_MSK) 826 r->flags |= IEEE80211_TX_RC_SHORT_GI; 827 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band); 828 } 829 830 #ifdef CONFIG_IWLWIFI_DEBUG 831 const char *iwl_get_tx_fail_reason(u32 status) 832 { 833 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 834 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 835 836 switch (status & TX_STATUS_MSK) { 837 case TX_STATUS_SUCCESS: 838 return "SUCCESS"; 839 TX_STATUS_POSTPONE(DELAY); 840 TX_STATUS_POSTPONE(FEW_BYTES); 841 TX_STATUS_POSTPONE(BT_PRIO); 842 TX_STATUS_POSTPONE(QUIET_PERIOD); 843 TX_STATUS_POSTPONE(CALC_TTAK); 844 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 845 TX_STATUS_FAIL(SHORT_LIMIT); 846 TX_STATUS_FAIL(LONG_LIMIT); 847 TX_STATUS_FAIL(FIFO_UNDERRUN); 848 TX_STATUS_FAIL(DRAIN_FLOW); 849 TX_STATUS_FAIL(RFKILL_FLUSH); 850 TX_STATUS_FAIL(LIFE_EXPIRE); 851 TX_STATUS_FAIL(DEST_PS); 852 TX_STATUS_FAIL(HOST_ABORTED); 853 TX_STATUS_FAIL(BT_RETRY); 854 TX_STATUS_FAIL(STA_INVALID); 855 TX_STATUS_FAIL(FRAG_DROPPED); 856 TX_STATUS_FAIL(TID_DISABLE); 857 TX_STATUS_FAIL(FIFO_FLUSHED); 858 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); 859 TX_STATUS_FAIL(PASSIVE_NO_RX); 860 TX_STATUS_FAIL(NO_BEACON_ON_RADAR); 861 } 862 863 return "UNKNOWN"; 864 865 #undef TX_STATUS_FAIL 866 #undef TX_STATUS_POSTPONE 867 } 868 #endif /* CONFIG_IWLWIFI_DEBUG */ 869 870 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status) 871 { 872 status &= AGG_TX_STATUS_MSK; 873 874 switch (status) { 875 case AGG_TX_STATE_UNDERRUN_MSK: 876 priv->reply_agg_tx_stats.underrun++; 877 break; 878 case AGG_TX_STATE_BT_PRIO_MSK: 879 priv->reply_agg_tx_stats.bt_prio++; 880 break; 881 case AGG_TX_STATE_FEW_BYTES_MSK: 882 priv->reply_agg_tx_stats.few_bytes++; 883 break; 884 case AGG_TX_STATE_ABORT_MSK: 885 priv->reply_agg_tx_stats.abort++; 886 break; 887 case AGG_TX_STATE_LAST_SENT_TTL_MSK: 888 priv->reply_agg_tx_stats.last_sent_ttl++; 889 break; 890 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK: 891 priv->reply_agg_tx_stats.last_sent_try++; 892 break; 893 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK: 894 priv->reply_agg_tx_stats.last_sent_bt_kill++; 895 break; 896 case AGG_TX_STATE_SCD_QUERY_MSK: 897 priv->reply_agg_tx_stats.scd_query++; 898 break; 899 case AGG_TX_STATE_TEST_BAD_CRC32_MSK: 900 priv->reply_agg_tx_stats.bad_crc32++; 901 break; 902 case AGG_TX_STATE_RESPONSE_MSK: 903 priv->reply_agg_tx_stats.response++; 904 break; 905 case AGG_TX_STATE_DUMP_TX_MSK: 906 priv->reply_agg_tx_stats.dump_tx++; 907 break; 908 case AGG_TX_STATE_DELAY_TX_MSK: 909 priv->reply_agg_tx_stats.delay_tx++; 910 break; 911 default: 912 priv->reply_agg_tx_stats.unknown++; 913 break; 914 } 915 } 916 917 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp) 918 { 919 return le32_to_cpup((__le32 *)&tx_resp->status + 920 tx_resp->frame_count) & IEEE80211_MAX_SN; 921 } 922 923 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv, 924 struct iwlagn_tx_resp *tx_resp) 925 { 926 struct agg_tx_status *frame_status = &tx_resp->status; 927 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> 928 IWLAGN_TX_RES_TID_POS; 929 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> 930 IWLAGN_TX_RES_RA_POS; 931 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg; 932 u32 status = le16_to_cpu(tx_resp->status.status); 933 int i; 934 935 WARN_ON(tid == IWL_TID_NON_QOS); 936 937 if (agg->wait_for_ba) 938 IWL_DEBUG_TX_REPLY(priv, 939 "got tx response w/o block-ack\n"); 940 941 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); 942 agg->wait_for_ba = (tx_resp->frame_count > 1); 943 944 /* 945 * If the BT kill count is non-zero, we'll get this 946 * notification again. 947 */ 948 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 && 949 priv->lib->bt_params && 950 priv->lib->bt_params->advanced_bt_coexist) { 951 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n"); 952 } 953 954 if (tx_resp->frame_count == 1) 955 return; 956 957 IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n", 958 agg->txq_id, 959 le32_to_cpu(tx_resp->rate_n_flags), 960 iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count); 961 962 /* Construct bit-map of pending frames within Tx window */ 963 for (i = 0; i < tx_resp->frame_count; i++) { 964 u16 fstatus = le16_to_cpu(frame_status[i].status); 965 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS; 966 967 if (status & AGG_TX_STATUS_MSK) 968 iwlagn_count_agg_tx_err_status(priv, fstatus); 969 970 if (status & (AGG_TX_STATE_FEW_BYTES_MSK | 971 AGG_TX_STATE_ABORT_MSK)) 972 continue; 973 974 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1) 975 IWL_DEBUG_TX_REPLY(priv, 976 "%d: status %s (0x%04x), try-count (0x%01x)\n", 977 i, 978 iwl_get_agg_tx_fail_reason(fstatus), 979 fstatus & AGG_TX_STATUS_MSK, 980 retry_cnt); 981 } 982 } 983 984 #ifdef CONFIG_IWLWIFI_DEBUG 985 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x 986 987 const char *iwl_get_agg_tx_fail_reason(u16 status) 988 { 989 status &= AGG_TX_STATUS_MSK; 990 switch (status) { 991 case AGG_TX_STATE_TRANSMITTED: 992 return "SUCCESS"; 993 AGG_TX_STATE_FAIL(UNDERRUN_MSK); 994 AGG_TX_STATE_FAIL(BT_PRIO_MSK); 995 AGG_TX_STATE_FAIL(FEW_BYTES_MSK); 996 AGG_TX_STATE_FAIL(ABORT_MSK); 997 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK); 998 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK); 999 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK); 1000 AGG_TX_STATE_FAIL(SCD_QUERY_MSK); 1001 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK); 1002 AGG_TX_STATE_FAIL(RESPONSE_MSK); 1003 AGG_TX_STATE_FAIL(DUMP_TX_MSK); 1004 AGG_TX_STATE_FAIL(DELAY_TX_MSK); 1005 } 1006 1007 return "UNKNOWN"; 1008 } 1009 #endif /* CONFIG_IWLWIFI_DEBUG */ 1010 1011 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status) 1012 { 1013 status &= TX_STATUS_MSK; 1014 1015 switch (status) { 1016 case TX_STATUS_POSTPONE_DELAY: 1017 priv->reply_tx_stats.pp_delay++; 1018 break; 1019 case TX_STATUS_POSTPONE_FEW_BYTES: 1020 priv->reply_tx_stats.pp_few_bytes++; 1021 break; 1022 case TX_STATUS_POSTPONE_BT_PRIO: 1023 priv->reply_tx_stats.pp_bt_prio++; 1024 break; 1025 case TX_STATUS_POSTPONE_QUIET_PERIOD: 1026 priv->reply_tx_stats.pp_quiet_period++; 1027 break; 1028 case TX_STATUS_POSTPONE_CALC_TTAK: 1029 priv->reply_tx_stats.pp_calc_ttak++; 1030 break; 1031 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY: 1032 priv->reply_tx_stats.int_crossed_retry++; 1033 break; 1034 case TX_STATUS_FAIL_SHORT_LIMIT: 1035 priv->reply_tx_stats.short_limit++; 1036 break; 1037 case TX_STATUS_FAIL_LONG_LIMIT: 1038 priv->reply_tx_stats.long_limit++; 1039 break; 1040 case TX_STATUS_FAIL_FIFO_UNDERRUN: 1041 priv->reply_tx_stats.fifo_underrun++; 1042 break; 1043 case TX_STATUS_FAIL_DRAIN_FLOW: 1044 priv->reply_tx_stats.drain_flow++; 1045 break; 1046 case TX_STATUS_FAIL_RFKILL_FLUSH: 1047 priv->reply_tx_stats.rfkill_flush++; 1048 break; 1049 case TX_STATUS_FAIL_LIFE_EXPIRE: 1050 priv->reply_tx_stats.life_expire++; 1051 break; 1052 case TX_STATUS_FAIL_DEST_PS: 1053 priv->reply_tx_stats.dest_ps++; 1054 break; 1055 case TX_STATUS_FAIL_HOST_ABORTED: 1056 priv->reply_tx_stats.host_abort++; 1057 break; 1058 case TX_STATUS_FAIL_BT_RETRY: 1059 priv->reply_tx_stats.bt_retry++; 1060 break; 1061 case TX_STATUS_FAIL_STA_INVALID: 1062 priv->reply_tx_stats.sta_invalid++; 1063 break; 1064 case TX_STATUS_FAIL_FRAG_DROPPED: 1065 priv->reply_tx_stats.frag_drop++; 1066 break; 1067 case TX_STATUS_FAIL_TID_DISABLE: 1068 priv->reply_tx_stats.tid_disable++; 1069 break; 1070 case TX_STATUS_FAIL_FIFO_FLUSHED: 1071 priv->reply_tx_stats.fifo_flush++; 1072 break; 1073 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL: 1074 priv->reply_tx_stats.insuff_cf_poll++; 1075 break; 1076 case TX_STATUS_FAIL_PASSIVE_NO_RX: 1077 priv->reply_tx_stats.fail_hw_drop++; 1078 break; 1079 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR: 1080 priv->reply_tx_stats.sta_color_mismatch++; 1081 break; 1082 default: 1083 priv->reply_tx_stats.unknown++; 1084 break; 1085 } 1086 } 1087 1088 static void iwlagn_set_tx_status(struct iwl_priv *priv, 1089 struct ieee80211_tx_info *info, 1090 struct iwlagn_tx_resp *tx_resp) 1091 { 1092 u16 status = le16_to_cpu(tx_resp->status.status); 1093 1094 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1095 1096 info->status.rates[0].count = tx_resp->failure_frame + 1; 1097 info->flags |= iwl_tx_status_to_mac80211(status); 1098 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags), 1099 info); 1100 if (!iwl_is_tx_success(status)) 1101 iwlagn_count_tx_err_status(priv, status); 1102 } 1103 1104 static void iwl_check_abort_status(struct iwl_priv *priv, 1105 u8 frame_count, u32 status) 1106 { 1107 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { 1108 IWL_ERR(priv, "Tx flush command to flush out all frames\n"); 1109 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) 1110 queue_work(priv->workqueue, &priv->tx_flush); 1111 } 1112 } 1113 1114 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb) 1115 { 1116 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1117 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1118 int txq_id = SEQ_TO_QUEUE(sequence); 1119 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence); 1120 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data; 1121 struct ieee80211_hdr *hdr; 1122 u32 status = le16_to_cpu(tx_resp->status.status); 1123 u16 ssn = iwlagn_get_scd_ssn(tx_resp); 1124 int tid; 1125 int sta_id; 1126 int freed; 1127 struct ieee80211_tx_info *info; 1128 struct sk_buff_head skbs; 1129 struct sk_buff *skb; 1130 struct iwl_rxon_context *ctx; 1131 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE); 1132 1133 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> 1134 IWLAGN_TX_RES_TID_POS; 1135 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> 1136 IWLAGN_TX_RES_RA_POS; 1137 1138 spin_lock_bh(&priv->sta_lock); 1139 1140 if (is_agg) { 1141 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT || 1142 tid >= IWL_MAX_TID_COUNT); 1143 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id) 1144 IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id, 1145 priv->tid_data[sta_id][tid].agg.txq_id); 1146 iwl_rx_reply_tx_agg(priv, tx_resp); 1147 } 1148 1149 __skb_queue_head_init(&skbs); 1150 1151 if (tx_resp->frame_count == 1) { 1152 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl); 1153 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10); 1154 1155 if (is_agg) { 1156 /* If this is an aggregation queue, we can rely on the 1157 * ssn since the wifi sequence number corresponds to 1158 * the index in the TFD ring (%256). 1159 * The seq_ctl is the sequence control of the packet 1160 * to which this Tx response relates. But if there is a 1161 * hole in the bitmap of the BA we received, this Tx 1162 * response may allow to reclaim the hole and all the 1163 * subsequent packets that were already acked. 1164 * In that case, seq_ctl != ssn, and the next packet 1165 * to be reclaimed will be ssn and not seq_ctl. 1166 */ 1167 next_reclaimed = ssn; 1168 } 1169 1170 if (tid != IWL_TID_NON_QOS) { 1171 priv->tid_data[sta_id][tid].next_reclaimed = 1172 next_reclaimed; 1173 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n", 1174 next_reclaimed); 1175 iwlagn_check_ratid_empty(priv, sta_id, tid); 1176 } 1177 1178 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs); 1179 1180 freed = 0; 1181 1182 /* process frames */ 1183 skb_queue_walk(&skbs, skb) { 1184 hdr = (struct ieee80211_hdr *)skb->data; 1185 1186 if (!ieee80211_is_data_qos(hdr->frame_control)) 1187 priv->last_seq_ctl = tx_resp->seq_ctl; 1188 1189 info = IEEE80211_SKB_CB(skb); 1190 ctx = info->driver_data[0]; 1191 iwl_trans_free_tx_cmd(priv->trans, 1192 info->driver_data[1]); 1193 1194 memset(&info->status, 0, sizeof(info->status)); 1195 1196 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX && 1197 ctx->vif && 1198 ctx->vif->type == NL80211_IFTYPE_STATION) { 1199 /* block and stop all queues */ 1200 priv->passive_no_rx = true; 1201 IWL_DEBUG_TX_QUEUES(priv, 1202 "stop all queues: passive channel\n"); 1203 ieee80211_stop_queues(priv->hw); 1204 1205 IWL_DEBUG_TX_REPLY(priv, 1206 "TXQ %d status %s (0x%08x) " 1207 "rate_n_flags 0x%x retries %d\n", 1208 txq_id, 1209 iwl_get_tx_fail_reason(status), 1210 status, 1211 le32_to_cpu(tx_resp->rate_n_flags), 1212 tx_resp->failure_frame); 1213 1214 IWL_DEBUG_TX_REPLY(priv, 1215 "FrameCnt = %d, idx=%d\n", 1216 tx_resp->frame_count, cmd_index); 1217 } 1218 1219 /* check if BAR is needed */ 1220 if (is_agg && !iwl_is_tx_success(status)) 1221 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1222 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb), 1223 tx_resp); 1224 if (!is_agg) 1225 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1); 1226 1227 freed++; 1228 } 1229 1230 if (tid != IWL_TID_NON_QOS) { 1231 priv->tid_data[sta_id][tid].next_reclaimed = 1232 next_reclaimed; 1233 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n", 1234 next_reclaimed); 1235 } 1236 1237 if (!is_agg && freed != 1) 1238 IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed); 1239 1240 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id, 1241 iwl_get_tx_fail_reason(status), status); 1242 1243 IWL_DEBUG_TX_REPLY(priv, 1244 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n", 1245 le32_to_cpu(tx_resp->rate_n_flags), 1246 tx_resp->failure_frame, 1247 SEQ_TO_INDEX(sequence), ssn, 1248 le16_to_cpu(tx_resp->seq_ctl)); 1249 } 1250 1251 iwl_check_abort_status(priv, tx_resp->frame_count, status); 1252 spin_unlock_bh(&priv->sta_lock); 1253 1254 while (!skb_queue_empty(&skbs)) { 1255 skb = __skb_dequeue(&skbs); 1256 ieee80211_tx_status(priv->hw, skb); 1257 } 1258 } 1259 1260 /** 1261 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA 1262 * 1263 * Handles block-acknowledge notification from device, which reports success 1264 * of frames sent via aggregation. 1265 */ 1266 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv, 1267 struct iwl_rx_cmd_buffer *rxb) 1268 { 1269 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1270 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data; 1271 struct iwl_ht_agg *agg; 1272 struct sk_buff_head reclaimed_skbs; 1273 struct sk_buff *skb; 1274 int sta_id; 1275 int tid; 1276 int freed; 1277 1278 /* "flow" corresponds to Tx queue */ 1279 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); 1280 1281 /* "ssn" is start of block-ack Tx window, corresponds to index 1282 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1283 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); 1284 1285 if (scd_flow >= priv->trans->trans_cfg->base_params->num_of_queues) { 1286 IWL_ERR(priv, 1287 "BUG_ON scd_flow is bigger than number of queues\n"); 1288 return; 1289 } 1290 1291 sta_id = ba_resp->sta_id; 1292 tid = ba_resp->tid; 1293 agg = &priv->tid_data[sta_id][tid].agg; 1294 1295 spin_lock_bh(&priv->sta_lock); 1296 1297 if (unlikely(!agg->wait_for_ba)) { 1298 if (unlikely(ba_resp->bitmap)) 1299 IWL_ERR(priv, "Received BA when not expected\n"); 1300 spin_unlock_bh(&priv->sta_lock); 1301 return; 1302 } 1303 1304 if (unlikely(scd_flow != agg->txq_id)) { 1305 /* 1306 * FIXME: this is a uCode bug which need to be addressed, 1307 * log the information and return for now. 1308 * Since it is can possibly happen very often and in order 1309 * not to fill the syslog, don't use IWL_ERR or IWL_WARN 1310 */ 1311 IWL_DEBUG_TX_QUEUES(priv, 1312 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n", 1313 scd_flow, sta_id, tid, agg->txq_id); 1314 spin_unlock_bh(&priv->sta_lock); 1315 return; 1316 } 1317 1318 __skb_queue_head_init(&reclaimed_skbs); 1319 1320 /* Release all TFDs before the SSN, i.e. all TFDs in front of 1321 * block-ack window (we assume that they've been successfully 1322 * transmitted ... if not, it's too late anyway). */ 1323 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn, 1324 &reclaimed_skbs); 1325 1326 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " 1327 "sta_id = %d\n", 1328 agg->wait_for_ba, 1329 (u8 *) &ba_resp->sta_addr_lo32, 1330 ba_resp->sta_id); 1331 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, " 1332 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1333 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl), 1334 (unsigned long long)le64_to_cpu(ba_resp->bitmap), 1335 scd_flow, ba_resp_scd_ssn, ba_resp->txed, 1336 ba_resp->txed_2_done); 1337 1338 /* Mark that the expected block-ack response arrived */ 1339 agg->wait_for_ba = false; 1340 1341 /* Sanity check values reported by uCode */ 1342 if (ba_resp->txed_2_done > ba_resp->txed) { 1343 IWL_DEBUG_TX_REPLY(priv, 1344 "bogus sent(%d) and ack(%d) count\n", 1345 ba_resp->txed, ba_resp->txed_2_done); 1346 /* 1347 * set txed_2_done = txed, 1348 * so it won't impact rate scale 1349 */ 1350 ba_resp->txed = ba_resp->txed_2_done; 1351 } 1352 1353 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn; 1354 1355 iwlagn_check_ratid_empty(priv, sta_id, tid); 1356 freed = 0; 1357 1358 skb_queue_walk(&reclaimed_skbs, skb) { 1359 struct ieee80211_hdr *hdr = (void *)skb->data; 1360 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1361 1362 if (ieee80211_is_data_qos(hdr->frame_control)) 1363 freed++; 1364 else 1365 WARN_ON_ONCE(1); 1366 1367 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]); 1368 1369 memset(&info->status, 0, sizeof(info->status)); 1370 /* Packet was transmitted successfully, failures come as single 1371 * frames because before failing a frame the firmware transmits 1372 * it without aggregation at least once. 1373 */ 1374 info->flags |= IEEE80211_TX_STAT_ACK; 1375 1376 if (freed == 1) { 1377 /* this is the first skb we deliver in this batch */ 1378 /* put the rate scaling data there */ 1379 info = IEEE80211_SKB_CB(skb); 1380 memset(&info->status, 0, sizeof(info->status)); 1381 info->flags |= IEEE80211_TX_STAT_AMPDU; 1382 info->status.ampdu_ack_len = ba_resp->txed_2_done; 1383 info->status.ampdu_len = ba_resp->txed; 1384 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags, 1385 info); 1386 } 1387 } 1388 1389 spin_unlock_bh(&priv->sta_lock); 1390 1391 while (!skb_queue_empty(&reclaimed_skbs)) { 1392 skb = __skb_dequeue(&reclaimed_skbs); 1393 ieee80211_tx_status(priv->hw, skb); 1394 } 1395 } 1396