1/****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of version 2 of the GNU General Public License as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 23 * USA 24 * 25 * The full GNU General Public License is included in this distribution 26 * in the file called COPYING. 27 * 28 * Contact Information: 29 * Intel Linux Wireless <ilw@linux.intel.com> 30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 31 * 32 * BSD LICENSE 33 * 34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 42 * * Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * * Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in 46 * the documentation and/or other materials provided with the 47 * distribution. 48 * * Neither the name Intel Corporation nor the names of its 49 * contributors may be used to endorse or promote products derived 50 * from this software without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 63 * 64 *****************************************************************************/ 65#include <linux/ieee80211.h> 66#include <linux/etherdevice.h> 67 68#include "iwl-trans.h" 69#include "iwl-eeprom-parse.h" 70#include "mvm.h" 71#include "sta.h" 72 73/* 74 * Sets most of the Tx cmd's fields 75 */ 76static void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 77 struct iwl_tx_cmd *tx_cmd, 78 struct ieee80211_tx_info *info, u8 sta_id) 79{ 80 struct ieee80211_hdr *hdr = (void *)skb->data; 81 __le16 fc = hdr->frame_control; 82 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 83 u32 len = skb->len + FCS_LEN; 84 u8 ac; 85 86 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 87 tx_flags |= TX_CMD_FLG_ACK; 88 else 89 tx_flags &= ~TX_CMD_FLG_ACK; 90 91 if (ieee80211_is_probe_resp(fc)) 92 tx_flags |= TX_CMD_FLG_TSF; 93 else if (ieee80211_is_back_req(fc)) 94 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 95 96 if (ieee80211_has_morefrags(fc)) 97 tx_flags |= TX_CMD_FLG_MORE_FRAG; 98 99 if (ieee80211_is_data_qos(fc)) { 100 u8 *qc = ieee80211_get_qos_ctl(hdr); 101 tx_cmd->tid_tspec = qc[0] & 0xf; 102 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 103 } else { 104 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 105 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 106 tx_flags |= TX_CMD_FLG_SEQ_CTL; 107 else 108 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 109 } 110 111 /* tid_tspec will default to 0 = BE when QOS isn't enabled */ 112 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 113 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 114 TX_CMD_FLG_BT_PRIO_POS; 115 116 if (ieee80211_is_mgmt(fc)) { 117 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 118 tx_cmd->pm_frame_timeout = cpu_to_le16(3); 119 else 120 tx_cmd->pm_frame_timeout = cpu_to_le16(2); 121 122 /* The spec allows Action frames in A-MPDU, we don't support 123 * it 124 */ 125 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 126 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 127 tx_cmd->pm_frame_timeout = cpu_to_le16(2); 128 } else { 129 tx_cmd->pm_frame_timeout = 0; 130 } 131 132 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 133 !is_multicast_ether_addr(ieee80211_get_DA(hdr))) 134 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 135 136 if ((mvm->fw->ucode_capa.capa[0] & 137 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 138 ieee80211_action_contains_tpc(skb)) 139 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 140 141 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 142 /* Total # bytes to be transmitted */ 143 tx_cmd->len = cpu_to_le16((u16)skb->len); 144 tx_cmd->next_frame_len = 0; 145 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 146 tx_cmd->sta_id = sta_id; 147} 148 149/* 150 * Sets the fields in the Tx cmd that are rate related 151 */ 152static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, 153 struct iwl_tx_cmd *tx_cmd, 154 struct ieee80211_tx_info *info, 155 struct ieee80211_sta *sta, 156 __le16 fc) 157{ 158 u32 rate_flags; 159 int rate_idx; 160 u8 rate_plcp; 161 162 /* Set retry limit on RTS packets */ 163 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 164 165 /* Set retry limit on DATA packets and Probe Responses*/ 166 if (ieee80211_is_probe_resp(fc)) { 167 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 168 tx_cmd->rts_retry_limit = 169 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 170 } else if (ieee80211_is_back_req(fc)) { 171 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 172 } else { 173 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 174 } 175 176 /* 177 * for data packets, rate info comes from the table inside the fw. This 178 * table is controlled by LINK_QUALITY commands 179 */ 180 181 if (ieee80211_is_data(fc) && sta) { 182 tx_cmd->initial_rate_index = 0; 183 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 184 return; 185 } else if (ieee80211_is_back_req(fc)) { 186 tx_cmd->tx_flags |= 187 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 188 } 189 190 /* HT rate doesn't make sense for a non data frame */ 191 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, 192 "Got an HT rate for a non data frame 0x%x\n", 193 info->control.rates[0].flags); 194 195 rate_idx = info->control.rates[0].idx; 196 /* if the rate isn't a well known legacy rate, take the lowest one */ 197 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY) 198 rate_idx = rate_lowest_index( 199 &mvm->nvm_data->bands[info->band], sta); 200 201 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 202 if (info->band == IEEE80211_BAND_5GHZ) 203 rate_idx += IWL_FIRST_OFDM_RATE; 204 205 /* For 2.4 GHZ band, check that there is no need to remap */ 206 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 207 208 /* Get PLCP rate for tx_cmd->rate_n_flags */ 209 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 210 211 mvm->mgmt_last_antenna_idx = 212 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant, 213 mvm->mgmt_last_antenna_idx); 214 215 if (info->band == IEEE80211_BAND_2GHZ && 216 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 217 rate_flags = BIT(mvm->cfg->non_shared_ant) << RATE_MCS_ANT_POS; 218 else 219 rate_flags = 220 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 221 222 /* Set CCK flag as needed */ 223 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 224 rate_flags |= RATE_MCS_CCK_MSK; 225 226 /* Set the rate in the TX cmd */ 227 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags); 228} 229 230/* 231 * Sets the fields in the Tx cmd that are crypto related 232 */ 233static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 234 struct ieee80211_tx_info *info, 235 struct iwl_tx_cmd *tx_cmd, 236 struct sk_buff *skb_frag) 237{ 238 struct ieee80211_key_conf *keyconf = info->control.hw_key; 239 240 switch (keyconf->cipher) { 241 case WLAN_CIPHER_SUITE_CCMP: 242 tx_cmd->sec_ctl = TX_CMD_SEC_CCM; 243 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); 244 if (info->flags & IEEE80211_TX_CTL_AMPDU) 245 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG); 246 break; 247 248 case WLAN_CIPHER_SUITE_TKIP: 249 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 250 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 251 break; 252 253 case WLAN_CIPHER_SUITE_WEP104: 254 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 255 /* fall through */ 256 case WLAN_CIPHER_SUITE_WEP40: 257 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 258 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 259 TX_CMD_SEC_WEP_KEY_IDX_MSK); 260 261 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 262 break; 263 default: 264 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 265 } 266} 267 268/* 269 * Allocates and sets the Tx cmd the driver data pointers in the skb 270 */ 271static struct iwl_device_cmd * 272iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 273 struct ieee80211_sta *sta, u8 sta_id) 274{ 275 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 276 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 277 struct iwl_device_cmd *dev_cmd; 278 struct iwl_tx_cmd *tx_cmd; 279 280 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 281 282 if (unlikely(!dev_cmd)) 283 return NULL; 284 285 memset(dev_cmd, 0, sizeof(*dev_cmd)); 286 dev_cmd->hdr.cmd = TX_CMD; 287 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 288 289 if (info->control.hw_key) 290 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb); 291 292 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 293 294 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 295 296 memset(&info->status, 0, sizeof(info->status)); 297 298 info->driver_data[0] = NULL; 299 info->driver_data[1] = dev_cmd; 300 301 return dev_cmd; 302} 303 304int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 305{ 306 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 307 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 308 struct iwl_device_cmd *dev_cmd; 309 struct iwl_tx_cmd *tx_cmd; 310 u8 sta_id; 311 312 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU)) 313 return -1; 314 315 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 316 (!info->control.vif || 317 info->hw_queue != info->control.vif->cab_queue))) 318 return -1; 319 320 /* 321 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used 322 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel 323 * queue. STATION (HS2.0) uses the auxiliary context of the FW, 324 * and hence needs to be sent on the aux queue 325 */ 326 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 327 info->control.vif->type == NL80211_IFTYPE_STATION) 328 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue; 329 330 /* 331 * If the interface on which frame is sent is the P2P_DEVICE 332 * or an AP/GO interface use the broadcast station associated 333 * with it; otherwise use the AUX station. 334 */ 335 if (info->control.vif && 336 (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 337 info->control.vif->type == NL80211_IFTYPE_AP)) { 338 struct iwl_mvm_vif *mvmvif = 339 iwl_mvm_vif_from_mac80211(info->control.vif); 340 sta_id = mvmvif->bcast_sta.sta_id; 341 } else { 342 sta_id = mvm->aux_sta.sta_id; 343 } 344 345 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue); 346 347 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id); 348 if (!dev_cmd) 349 return -1; 350 351 /* From now on, we cannot access info->control */ 352 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 353 354 /* Copy MAC header from skb into command buffer */ 355 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control)); 356 357 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) { 358 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 359 return -1; 360 } 361 362 return 0; 363} 364 365/* 366 * Sets the fields in the Tx cmd that are crypto related 367 */ 368int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 369 struct ieee80211_sta *sta) 370{ 371 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 372 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 373 struct iwl_mvm_sta *mvmsta; 374 struct iwl_device_cmd *dev_cmd; 375 struct iwl_tx_cmd *tx_cmd; 376 __le16 fc; 377 u16 seq_number = 0; 378 u8 tid = IWL_MAX_TID_COUNT; 379 u8 txq_id = info->hw_queue; 380 bool is_data_qos = false, is_ampdu = false; 381 382 mvmsta = iwl_mvm_sta_from_mac80211(sta); 383 fc = hdr->frame_control; 384 385 if (WARN_ON_ONCE(!mvmsta)) 386 return -1; 387 388 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) 389 return -1; 390 391 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id); 392 if (!dev_cmd) 393 goto drop; 394 395 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 396 /* From now on, we cannot access info->control */ 397 398 /* 399 * we handle that entirely ourselves -- for uAPSD the firmware 400 * will always send a notification, and for PS-Poll responses 401 * we'll notify mac80211 when getting frame status 402 */ 403 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 404 405 spin_lock(&mvmsta->lock); 406 407 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 408 u8 *qc = NULL; 409 qc = ieee80211_get_qos_ctl(hdr); 410 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 411 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 412 goto drop_unlock_sta; 413 414 seq_number = mvmsta->tid_data[tid].seq_number; 415 seq_number &= IEEE80211_SCTL_SEQ; 416 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 417 hdr->seq_ctrl |= cpu_to_le16(seq_number); 418 is_data_qos = true; 419 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 420 } 421 422 /* Copy MAC header from skb into command buffer */ 423 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc)); 424 425 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 426 427 if (is_ampdu) { 428 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON)) 429 goto drop_unlock_sta; 430 txq_id = mvmsta->tid_data[tid].txq_id; 431 } 432 433 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 434 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 435 436 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 437 goto drop_unlock_sta; 438 439 if (is_data_qos && !ieee80211_has_morefrags(fc)) 440 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 441 442 spin_unlock(&mvmsta->lock); 443 444 if (txq_id < mvm->first_agg_queue) 445 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); 446 447 return 0; 448 449drop_unlock_sta: 450 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 451 spin_unlock(&mvmsta->lock); 452drop: 453 return -1; 454} 455 456static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 457 struct ieee80211_sta *sta, u8 tid) 458{ 459 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 460 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 461 struct ieee80211_vif *vif = mvmsta->vif; 462 463 lockdep_assert_held(&mvmsta->lock); 464 465 if ((tid_data->state == IWL_AGG_ON || 466 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 467 iwl_mvm_tid_queued(tid_data) == 0) { 468 /* 469 * Now that this aggregation queue is empty tell mac80211 so it 470 * knows we no longer have frames buffered for the station on 471 * this TID (for the TIM bitmap calculation.) 472 */ 473 ieee80211_sta_set_buffered(sta, tid, false); 474 } 475 476 if (tid_data->ssn != tid_data->next_reclaimed) 477 return; 478 479 switch (tid_data->state) { 480 case IWL_EMPTYING_HW_QUEUE_ADDBA: 481 IWL_DEBUG_TX_QUEUES(mvm, 482 "Can continue addBA flow ssn = next_recl = %d\n", 483 tid_data->next_reclaimed); 484 tid_data->state = IWL_AGG_STARTING; 485 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 486 break; 487 488 case IWL_EMPTYING_HW_QUEUE_DELBA: 489 IWL_DEBUG_TX_QUEUES(mvm, 490 "Can continue DELBA flow ssn = next_recl = %d\n", 491 tid_data->next_reclaimed); 492 iwl_mvm_disable_txq(mvm, tid_data->txq_id); 493 tid_data->state = IWL_AGG_OFF; 494 /* 495 * we can't hold the mutex - but since we are after a sequence 496 * point (call to iwl_mvm_disable_txq(), so we don't even need 497 * a memory barrier. 498 */ 499 mvm->queue_to_mac80211[tid_data->txq_id] = 500 IWL_INVALID_MAC80211_QUEUE; 501 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 502 break; 503 504 default: 505 break; 506 } 507} 508 509#ifdef CONFIG_IWLWIFI_DEBUG 510const char *iwl_mvm_get_tx_fail_reason(u32 status) 511{ 512#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 513#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 514 515 switch (status & TX_STATUS_MSK) { 516 case TX_STATUS_SUCCESS: 517 return "SUCCESS"; 518 TX_STATUS_POSTPONE(DELAY); 519 TX_STATUS_POSTPONE(FEW_BYTES); 520 TX_STATUS_POSTPONE(BT_PRIO); 521 TX_STATUS_POSTPONE(QUIET_PERIOD); 522 TX_STATUS_POSTPONE(CALC_TTAK); 523 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 524 TX_STATUS_FAIL(SHORT_LIMIT); 525 TX_STATUS_FAIL(LONG_LIMIT); 526 TX_STATUS_FAIL(UNDERRUN); 527 TX_STATUS_FAIL(DRAIN_FLOW); 528 TX_STATUS_FAIL(RFKILL_FLUSH); 529 TX_STATUS_FAIL(LIFE_EXPIRE); 530 TX_STATUS_FAIL(DEST_PS); 531 TX_STATUS_FAIL(HOST_ABORTED); 532 TX_STATUS_FAIL(BT_RETRY); 533 TX_STATUS_FAIL(STA_INVALID); 534 TX_STATUS_FAIL(FRAG_DROPPED); 535 TX_STATUS_FAIL(TID_DISABLE); 536 TX_STATUS_FAIL(FIFO_FLUSHED); 537 TX_STATUS_FAIL(SMALL_CF_POLL); 538 TX_STATUS_FAIL(FW_DROP); 539 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 540 } 541 542 return "UNKNOWN"; 543 544#undef TX_STATUS_FAIL 545#undef TX_STATUS_POSTPONE 546} 547#endif /* CONFIG_IWLWIFI_DEBUG */ 548 549void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 550 enum ieee80211_band band, 551 struct ieee80211_tx_rate *r) 552{ 553 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 554 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 555 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 556 case RATE_MCS_CHAN_WIDTH_20: 557 break; 558 case RATE_MCS_CHAN_WIDTH_40: 559 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 560 break; 561 case RATE_MCS_CHAN_WIDTH_80: 562 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 563 break; 564 case RATE_MCS_CHAN_WIDTH_160: 565 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 566 break; 567 } 568 if (rate_n_flags & RATE_MCS_SGI_MSK) 569 r->flags |= IEEE80211_TX_RC_SHORT_GI; 570 if (rate_n_flags & RATE_MCS_HT_MSK) { 571 r->flags |= IEEE80211_TX_RC_MCS; 572 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 573 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 574 ieee80211_rate_set_vht( 575 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 576 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 577 RATE_VHT_MCS_NSS_POS) + 1); 578 r->flags |= IEEE80211_TX_RC_VHT_MCS; 579 } else { 580 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 581 band); 582 } 583} 584 585/** 586 * translate ucode response to mac80211 tx status control values 587 */ 588static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 589 struct ieee80211_tx_info *info) 590{ 591 struct ieee80211_tx_rate *r = &info->status.rates[0]; 592 593 info->status.antenna = 594 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 595 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 596} 597 598static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 599 struct iwl_rx_packet *pkt) 600{ 601 struct ieee80211_sta *sta; 602 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 603 int txq_id = SEQ_TO_QUEUE(sequence); 604 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 605 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 606 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 607 u32 status = le16_to_cpu(tx_resp->status.status); 608 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); 609 struct iwl_mvm_sta *mvmsta; 610 struct sk_buff_head skbs; 611 u8 skb_freed = 0; 612 u16 next_reclaimed, seq_ctl; 613 614 __skb_queue_head_init(&skbs); 615 616 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 617 618 /* we can free until ssn % q.n_bd not inclusive */ 619 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 620 621 while (!skb_queue_empty(&skbs)) { 622 struct sk_buff *skb = __skb_dequeue(&skbs); 623 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 624 625 skb_freed++; 626 627 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 628 629 memset(&info->status, 0, sizeof(info->status)); 630 631 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 632 633 /* inform mac80211 about what happened with the frame */ 634 switch (status & TX_STATUS_MSK) { 635 case TX_STATUS_SUCCESS: 636 case TX_STATUS_DIRECT_DONE: 637 info->flags |= IEEE80211_TX_STAT_ACK; 638 break; 639 case TX_STATUS_FAIL_DEST_PS: 640 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 641 break; 642 default: 643 break; 644 } 645 646 info->status.rates[0].count = tx_resp->failure_frame + 1; 647 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 648 info); 649 650 /* Single frame failure in an AMPDU queue => send BAR */ 651 if (txq_id >= mvm->first_agg_queue && 652 !(info->flags & IEEE80211_TX_STAT_ACK)) 653 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 654 655 /* W/A FW bug: seq_ctl is wrong when the status isn't success */ 656 if (status != TX_STATUS_SUCCESS) { 657 struct ieee80211_hdr *hdr = (void *)skb->data; 658 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 659 } 660 661 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 662 info->status.status_driver_data[0] = 663 (void *)(uintptr_t)tx_resp->reduced_tpc; 664 665 ieee80211_tx_status(mvm->hw, skb); 666 } 667 668 if (txq_id >= mvm->first_agg_queue) { 669 /* If this is an aggregation queue, we use the ssn since: 670 * ssn = wifi seq_num % 256. 671 * The seq_ctl is the sequence control of the packet to which 672 * this Tx response relates. But if there is a hole in the 673 * bitmap of the BA we received, this Tx response may allow to 674 * reclaim the hole and all the subsequent packets that were 675 * already acked. In that case, seq_ctl != ssn, and the next 676 * packet to be reclaimed will be ssn and not seq_ctl. In that 677 * case, several packets will be reclaimed even if 678 * frame_count = 1. 679 * 680 * The ssn is the index (% 256) of the latest packet that has 681 * treated (acked / dropped) + 1. 682 */ 683 next_reclaimed = ssn; 684 } else { 685 /* The next packet to be reclaimed is the one after this one */ 686 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); 687 } 688 689 IWL_DEBUG_TX_REPLY(mvm, 690 "TXQ %d status %s (0x%08x)\n", 691 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 692 693 IWL_DEBUG_TX_REPLY(mvm, 694 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 695 le32_to_cpu(tx_resp->initial_rate), 696 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 697 ssn, next_reclaimed, seq_ctl); 698 699 rcu_read_lock(); 700 701 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 702 /* 703 * sta can't be NULL otherwise it'd mean that the sta has been freed in 704 * the firmware while we still have packets for it in the Tx queues. 705 */ 706 if (WARN_ON_ONCE(!sta)) 707 goto out; 708 709 if (!IS_ERR(sta)) { 710 mvmsta = iwl_mvm_sta_from_mac80211(sta); 711 712 if (tid != IWL_TID_NON_QOS) { 713 struct iwl_mvm_tid_data *tid_data = 714 &mvmsta->tid_data[tid]; 715 716 spin_lock_bh(&mvmsta->lock); 717 tid_data->next_reclaimed = next_reclaimed; 718 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n", 719 next_reclaimed); 720 iwl_mvm_check_ratid_empty(mvm, sta, tid); 721 spin_unlock_bh(&mvmsta->lock); 722 } 723 724 if (mvmsta->next_status_eosp) { 725 mvmsta->next_status_eosp = false; 726 ieee80211_sta_eosp(sta); 727 } 728 } else { 729 mvmsta = NULL; 730 } 731 732 /* 733 * If the txq is not an AMPDU queue, there is no chance we freed 734 * several skbs. Check that out... 735 */ 736 if (txq_id >= mvm->first_agg_queue) 737 goto out; 738 739 /* We can't free more than one frame at once on a shared queue */ 740 WARN_ON(skb_freed > 1); 741 742 /* If we have still frames for this STA nothing to do here */ 743 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) 744 goto out; 745 746 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { 747 748 /* 749 * If there are no pending frames for this STA and 750 * the tx to this station is not disabled, notify 751 * mac80211 that this station can now wake up in its 752 * STA table. 753 * If mvmsta is not NULL, sta is valid. 754 */ 755 756 spin_lock_bh(&mvmsta->lock); 757 758 if (!mvmsta->disable_tx) 759 ieee80211_sta_block_awake(mvm->hw, sta, false); 760 761 spin_unlock_bh(&mvmsta->lock); 762 } 763 764 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { 765 /* 766 * We are draining and this was the last packet - pre_rcu_remove 767 * has been called already. We might be after the 768 * synchronize_net already. 769 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. 770 */ 771 set_bit(sta_id, mvm->sta_drained); 772 schedule_work(&mvm->sta_drained_wk); 773 } 774 775out: 776 rcu_read_unlock(); 777} 778 779#ifdef CONFIG_IWLWIFI_DEBUG 780#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 781static const char *iwl_get_agg_tx_status(u16 status) 782{ 783 switch (status & AGG_TX_STATE_STATUS_MSK) { 784 AGG_TX_STATE_(TRANSMITTED); 785 AGG_TX_STATE_(UNDERRUN); 786 AGG_TX_STATE_(BT_PRIO); 787 AGG_TX_STATE_(FEW_BYTES); 788 AGG_TX_STATE_(ABORT); 789 AGG_TX_STATE_(LAST_SENT_TTL); 790 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 791 AGG_TX_STATE_(LAST_SENT_BT_KILL); 792 AGG_TX_STATE_(SCD_QUERY); 793 AGG_TX_STATE_(TEST_BAD_CRC32); 794 AGG_TX_STATE_(RESPONSE); 795 AGG_TX_STATE_(DUMP_TX); 796 AGG_TX_STATE_(DELAY_TX); 797 } 798 799 return "UNKNOWN"; 800} 801 802static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 803 struct iwl_rx_packet *pkt) 804{ 805 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 806 struct agg_tx_status *frame_status = &tx_resp->status; 807 int i; 808 809 for (i = 0; i < tx_resp->frame_count; i++) { 810 u16 fstatus = le16_to_cpu(frame_status[i].status); 811 812 IWL_DEBUG_TX_REPLY(mvm, 813 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 814 iwl_get_agg_tx_status(fstatus), 815 fstatus & AGG_TX_STATE_STATUS_MSK, 816 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 817 AGG_TX_STATE_TRY_CNT_POS, 818 le16_to_cpu(frame_status[i].sequence)); 819 } 820} 821#else 822static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 823 struct iwl_rx_packet *pkt) 824{} 825#endif /* CONFIG_IWLWIFI_DEBUG */ 826 827static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 828 struct iwl_rx_packet *pkt) 829{ 830 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 831 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 832 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 833 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 834 struct ieee80211_sta *sta; 835 836 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue)) 837 return; 838 839 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) 840 return; 841 842 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 843 844 rcu_read_lock(); 845 846 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 847 848 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 849 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 850 mvmsta->tid_data[tid].rate_n_flags = 851 le32_to_cpu(tx_resp->initial_rate); 852 mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc; 853 } 854 855 rcu_read_unlock(); 856} 857 858int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, 859 struct iwl_device_cmd *cmd) 860{ 861 struct iwl_rx_packet *pkt = rxb_addr(rxb); 862 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 863 864 if (tx_resp->frame_count == 1) 865 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 866 else 867 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 868 869 return 0; 870} 871 872static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info, 873 struct iwl_mvm_ba_notif *ba_notif, 874 struct iwl_mvm_tid_data *tid_data) 875{ 876 info->flags |= IEEE80211_TX_STAT_AMPDU; 877 info->status.ampdu_ack_len = ba_notif->txed_2_done; 878 info->status.ampdu_len = ba_notif->txed; 879 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags, 880 info); 881 info->status.status_driver_data[0] = 882 (void *)(uintptr_t)tid_data->reduced_tpc; 883} 884 885int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, 886 struct iwl_device_cmd *cmd) 887{ 888 struct iwl_rx_packet *pkt = rxb_addr(rxb); 889 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data; 890 struct sk_buff_head reclaimed_skbs; 891 struct iwl_mvm_tid_data *tid_data; 892 struct ieee80211_sta *sta; 893 struct iwl_mvm_sta *mvmsta; 894 struct sk_buff *skb; 895 int sta_id, tid, freed; 896 /* "flow" corresponds to Tx queue */ 897 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow); 898 /* "ssn" is start of block-ack Tx window, corresponds to index 899 * (in Tx queue's circular buffer) of first TFD/frame in window */ 900 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn); 901 902 sta_id = ba_notif->sta_id; 903 tid = ba_notif->tid; 904 905 rcu_read_lock(); 906 907 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 908 909 /* Reclaiming frames for a station that has been deleted ? */ 910 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 911 rcu_read_unlock(); 912 return 0; 913 } 914 915 mvmsta = iwl_mvm_sta_from_mac80211(sta); 916 tid_data = &mvmsta->tid_data[tid]; 917 918 if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d", 919 tid_data->txq_id, tid, scd_flow)) { 920 rcu_read_unlock(); 921 return 0; 922 } 923 924 spin_lock_bh(&mvmsta->lock); 925 926 __skb_queue_head_init(&reclaimed_skbs); 927 928 /* 929 * Release all TFDs before the SSN, i.e. all TFDs in front of 930 * block-ack window (we assume that they've been successfully 931 * transmitted ... if not, it's too late anyway). 932 */ 933 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn, 934 &reclaimed_skbs); 935 936 IWL_DEBUG_TX_REPLY(mvm, 937 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 938 (u8 *)&ba_notif->sta_addr_lo32, 939 ba_notif->sta_id); 940 IWL_DEBUG_TX_REPLY(mvm, 941 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 942 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 943 (unsigned long long)le64_to_cpu(ba_notif->bitmap), 944 scd_flow, ba_resp_scd_ssn, ba_notif->txed, 945 ba_notif->txed_2_done); 946 947 tid_data->next_reclaimed = ba_resp_scd_ssn; 948 949 iwl_mvm_check_ratid_empty(mvm, sta, tid); 950 951 freed = 0; 952 953 skb_queue_walk(&reclaimed_skbs, skb) { 954 struct ieee80211_hdr *hdr = (void *)skb->data; 955 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 956 957 if (ieee80211_is_data_qos(hdr->frame_control)) 958 freed++; 959 else 960 WARN_ON_ONCE(1); 961 962 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 963 964 memset(&info->status, 0, sizeof(info->status)); 965 /* Packet was transmitted successfully, failures come as single 966 * frames because before failing a frame the firmware transmits 967 * it without aggregation at least once. 968 */ 969 info->flags |= IEEE80211_TX_STAT_ACK; 970 971 /* this is the first skb we deliver in this batch */ 972 /* put the rate scaling data there */ 973 if (freed == 1) 974 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data); 975 } 976 977 spin_unlock_bh(&mvmsta->lock); 978 979 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 980 * possible (i.e. first MPDU in the aggregation wasn't acked) 981 * Still it's important to update RS about sent vs. acked. 982 */ 983 if (skb_queue_empty(&reclaimed_skbs)) { 984 struct ieee80211_tx_info ba_info = {}; 985 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 986 987 if (mvmsta->vif) 988 chanctx_conf = 989 rcu_dereference(mvmsta->vif->chanctx_conf); 990 991 if (WARN_ON_ONCE(!chanctx_conf)) 992 goto out; 993 994 ba_info.band = chanctx_conf->def.chan->band; 995 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data); 996 997 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 998 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info); 999 } 1000 1001out: 1002 rcu_read_unlock(); 1003 1004 while (!skb_queue_empty(&reclaimed_skbs)) { 1005 skb = __skb_dequeue(&reclaimed_skbs); 1006 ieee80211_tx_status(mvm->hw, skb); 1007 } 1008 1009 return 0; 1010} 1011 1012int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync) 1013{ 1014 int ret; 1015 struct iwl_tx_path_flush_cmd flush_cmd = { 1016 .queues_ctl = cpu_to_le32(tfd_msk), 1017 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 1018 }; 1019 1020 u32 flags = sync ? 0 : CMD_ASYNC; 1021 1022 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1023 sizeof(flush_cmd), &flush_cmd); 1024 if (ret) 1025 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1026 return ret; 1027} 1028