1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2021 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH 6 */ 7 #include <linux/ieee80211.h> 8 #include <linux/etherdevice.h> 9 #include <linux/tcp.h> 10 #include <net/ip.h> 11 #include <net/ipv6.h> 12 13 #include "iwl-trans.h" 14 #include "iwl-eeprom-parse.h" 15 #include "mvm.h" 16 #include "sta.h" 17 18 static void 19 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 20 u16 tid, u16 ssn) 21 { 22 struct iwl_fw_dbg_trigger_tlv *trig; 23 struct iwl_fw_dbg_trigger_ba *ba_trig; 24 25 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA); 26 if (!trig) 27 return; 28 29 ba_trig = (void *)trig->data; 30 31 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 32 return; 33 34 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 35 "BAR sent to %pM, tid %d, ssn %d", 36 addr, tid, ssn); 37 } 38 39 #define OPT_HDR(type, skb, off) \ 40 (type *)(skb_network_header(skb) + (off)) 41 42 static u16 iwl_mvm_tx_csum_pre_bz(struct iwl_mvm *mvm, struct sk_buff *skb, 43 struct ieee80211_tx_info *info, bool amsdu) 44 { 45 struct ieee80211_hdr *hdr = (void *)skb->data; 46 u16 offload_assist = 0; 47 #if IS_ENABLED(CONFIG_INET) 48 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 49 u8 protocol = 0; 50 51 /* Do not compute checksum if already computed */ 52 if (skb->ip_summed != CHECKSUM_PARTIAL) 53 goto out; 54 55 /* We do not expect to be requested to csum stuff we do not support */ 56 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 57 (skb->protocol != htons(ETH_P_IP) && 58 skb->protocol != htons(ETH_P_IPV6)), 59 "No support for requested checksum\n")) { 60 skb_checksum_help(skb); 61 goto out; 62 } 63 64 if (skb->protocol == htons(ETH_P_IP)) { 65 protocol = ip_hdr(skb)->protocol; 66 } else { 67 #if IS_ENABLED(CONFIG_IPV6) 68 struct ipv6hdr *ipv6h = 69 (struct ipv6hdr *)skb_network_header(skb); 70 unsigned int off = sizeof(*ipv6h); 71 72 protocol = ipv6h->nexthdr; 73 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 74 struct ipv6_opt_hdr *hp; 75 76 /* only supported extension headers */ 77 if (protocol != NEXTHDR_ROUTING && 78 protocol != NEXTHDR_HOP && 79 protocol != NEXTHDR_DEST) { 80 skb_checksum_help(skb); 81 goto out; 82 } 83 84 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 85 protocol = hp->nexthdr; 86 off += ipv6_optlen(hp); 87 } 88 /* if we get here - protocol now should be TCP/UDP */ 89 #endif 90 } 91 92 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 93 WARN_ON_ONCE(1); 94 skb_checksum_help(skb); 95 goto out; 96 } 97 98 /* enable L4 csum */ 99 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 100 101 /* 102 * Set offset to IP header (snap). 103 * We don't support tunneling so no need to take care of inner header. 104 * Size is in words. 105 */ 106 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 107 108 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 109 if (skb->protocol == htons(ETH_P_IP) && amsdu) { 110 ip_hdr(skb)->check = 0; 111 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 112 } 113 114 /* reset UDP/TCP header csum */ 115 if (protocol == IPPROTO_TCP) 116 tcp_hdr(skb)->check = 0; 117 else 118 udp_hdr(skb)->check = 0; 119 120 /* 121 * mac header len should include IV, size is in words unless 122 * the IV is added by the firmware like in WEP. 123 * In new Tx API, the IV is always added by the firmware. 124 */ 125 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 126 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 127 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 128 mh_len += info->control.hw_key->iv_len; 129 mh_len /= 2; 130 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 131 132 out: 133 #endif 134 if (amsdu) 135 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 136 else if (ieee80211_hdrlen(hdr->frame_control) % 4) 137 /* padding is inserted later in transport */ 138 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 139 140 return offload_assist; 141 } 142 143 u32 iwl_mvm_tx_csum_bz(struct iwl_mvm *mvm, struct sk_buff *skb, bool amsdu) 144 { 145 struct ieee80211_hdr *hdr = (void *)skb->data; 146 u32 offload_assist = IWL_TX_CMD_OFFLD_BZ_PARTIAL_CSUM; 147 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 148 unsigned int csum_start = skb_checksum_start_offset(skb); 149 150 offload_assist |= u32_encode_bits(hdrlen / 2, 151 IWL_TX_CMD_OFFLD_BZ_MH_LEN); 152 if (amsdu) 153 offload_assist |= IWL_TX_CMD_OFFLD_BZ_AMSDU; 154 else if (hdrlen % 4) 155 /* padding is inserted later in transport */ 156 offload_assist |= IWL_TX_CMD_OFFLD_BZ_MH_PAD; 157 158 if (skb->ip_summed != CHECKSUM_PARTIAL) 159 return offload_assist; 160 161 offload_assist |= IWL_TX_CMD_OFFLD_BZ_ENABLE_CSUM | 162 IWL_TX_CMD_OFFLD_BZ_ZERO2ONES; 163 164 /* 165 * mac80211 will always calculate checksum in software for 166 * non-fast-xmit, and so we can only do offloaded checksum 167 * for fast-xmit frames. In this case, we always have the 168 * RFC 1042 header present. skb_checksum_start_offset() 169 * returns the offset from the beginning, but the hardware 170 * needs it from after the header & SNAP header. 171 */ 172 csum_start -= hdrlen + 8; 173 174 offload_assist |= u32_encode_bits(csum_start, 175 IWL_TX_CMD_OFFLD_BZ_START_OFFS); 176 offload_assist |= u32_encode_bits(csum_start + skb->csum_offset, 177 IWL_TX_CMD_OFFLD_BZ_RESULT_OFFS); 178 179 return offload_assist; 180 } 181 182 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 183 struct ieee80211_tx_info *info, 184 bool amsdu) 185 { 186 if (mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ) 187 return iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu); 188 return iwl_mvm_tx_csum_bz(mvm, skb, amsdu); 189 } 190 191 /* 192 * Sets most of the Tx cmd's fields 193 */ 194 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 195 struct iwl_tx_cmd *tx_cmd, 196 struct ieee80211_tx_info *info, u8 sta_id) 197 { 198 struct ieee80211_hdr *hdr = (void *)skb->data; 199 __le16 fc = hdr->frame_control; 200 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 201 u32 len = skb->len + FCS_LEN; 202 bool amsdu = false; 203 u8 ac; 204 205 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) || 206 (ieee80211_is_probe_resp(fc) && 207 !is_multicast_ether_addr(hdr->addr1))) 208 tx_flags |= TX_CMD_FLG_ACK; 209 else 210 tx_flags &= ~TX_CMD_FLG_ACK; 211 212 if (ieee80211_is_probe_resp(fc)) 213 tx_flags |= TX_CMD_FLG_TSF; 214 215 if (ieee80211_has_morefrags(fc)) 216 tx_flags |= TX_CMD_FLG_MORE_FRAG; 217 218 if (ieee80211_is_data_qos(fc)) { 219 u8 *qc = ieee80211_get_qos_ctl(hdr); 220 tx_cmd->tid_tspec = qc[0] & 0xf; 221 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 222 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 223 } else if (ieee80211_is_back_req(fc)) { 224 struct ieee80211_bar *bar = (void *)skb->data; 225 u16 control = le16_to_cpu(bar->control); 226 u16 ssn = le16_to_cpu(bar->start_seq_num); 227 228 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 229 tx_cmd->tid_tspec = (control & 230 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 231 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 232 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 233 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 234 ssn); 235 } else { 236 if (ieee80211_is_data(fc)) 237 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 238 else 239 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT; 240 241 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 242 tx_flags |= TX_CMD_FLG_SEQ_CTL; 243 else 244 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 245 } 246 247 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */ 248 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 249 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 250 else 251 ac = tid_to_mac80211_ac[0]; 252 253 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 254 TX_CMD_FLG_BT_PRIO_POS; 255 256 if (ieee80211_is_mgmt(fc)) { 257 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 258 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 259 else if (ieee80211_is_action(fc)) 260 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 261 else 262 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 263 264 /* The spec allows Action frames in A-MPDU, we don't support 265 * it 266 */ 267 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 268 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 269 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 270 } else { 271 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 272 } 273 274 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 275 !is_multicast_ether_addr(hdr->addr1)) 276 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 277 278 if (fw_has_capa(&mvm->fw->ucode_capa, 279 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 280 ieee80211_action_contains_tpc(skb)) 281 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 282 283 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 284 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 285 tx_cmd->len = cpu_to_le16((u16)skb->len); 286 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 287 tx_cmd->sta_id = sta_id; 288 289 tx_cmd->offload_assist = 290 cpu_to_le16(iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu)); 291 } 292 293 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, 294 struct ieee80211_tx_info *info, 295 struct ieee80211_sta *sta, __le16 fc) 296 { 297 if (info->band == NL80211_BAND_2GHZ && 298 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 299 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 300 301 if (sta && ieee80211_is_data(fc)) { 302 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 303 304 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS; 305 } 306 307 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 308 } 309 310 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 311 struct ieee80211_tx_info *info, 312 struct ieee80211_sta *sta, __le16 fc) 313 { 314 int rate_idx = -1; 315 u8 rate_plcp; 316 u32 rate_flags = 0; 317 bool is_cck; 318 319 /* info->control is only relevant for non HW rate control */ 320 if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { 321 /* HT rate doesn't make sense for a non data frame */ 322 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && 323 !ieee80211_is_data(fc), 324 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", 325 info->control.rates[0].flags, 326 info->control.rates[0].idx, 327 le16_to_cpu(fc), 328 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 329 330 rate_idx = info->control.rates[0].idx; 331 } 332 333 /* if the rate isn't a well known legacy rate, take the lowest one */ 334 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 335 rate_idx = rate_lowest_index( 336 &mvm->nvm_data->bands[info->band], sta); 337 338 /* 339 * For non 2 GHZ band, remap mac80211 rate 340 * indices into driver indices 341 */ 342 if (info->band != NL80211_BAND_2GHZ) 343 rate_idx += IWL_FIRST_OFDM_RATE; 344 345 /* For 2.4 GHZ band, check that there is no need to remap */ 346 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 347 348 /* Get PLCP rate for tx_cmd->rate_n_flags */ 349 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx); 350 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE); 351 352 /* Set CCK or OFDM flag */ 353 if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) { 354 if (!is_cck) 355 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK; 356 else 357 rate_flags |= RATE_MCS_CCK_MSK; 358 } else if (is_cck) { 359 rate_flags |= RATE_MCS_CCK_MSK_V1; 360 } 361 362 return (u32)rate_plcp | rate_flags; 363 } 364 365 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 366 struct ieee80211_tx_info *info, 367 struct ieee80211_sta *sta, __le16 fc) 368 { 369 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) | 370 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 371 } 372 373 /* 374 * Sets the fields in the Tx cmd that are rate related 375 */ 376 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 377 struct ieee80211_tx_info *info, 378 struct ieee80211_sta *sta, __le16 fc) 379 { 380 /* Set retry limit on RTS packets */ 381 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 382 383 /* Set retry limit on DATA packets and Probe Responses*/ 384 if (ieee80211_is_probe_resp(fc)) { 385 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 386 tx_cmd->rts_retry_limit = 387 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 388 } else if (ieee80211_is_back_req(fc)) { 389 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 390 } else { 391 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 392 } 393 394 /* 395 * for data packets, rate info comes from the table inside the fw. This 396 * table is controlled by LINK_QUALITY commands 397 */ 398 399 if (ieee80211_is_data(fc) && sta) { 400 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 401 402 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 403 tx_cmd->initial_rate_index = 0; 404 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 405 return; 406 } 407 } else if (ieee80211_is_back_req(fc)) { 408 tx_cmd->tx_flags |= 409 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 410 } 411 412 /* Set the rate in the TX cmd */ 413 tx_cmd->rate_n_flags = 414 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 415 } 416 417 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 418 u8 *crypto_hdr) 419 { 420 struct ieee80211_key_conf *keyconf = info->control.hw_key; 421 u64 pn; 422 423 pn = atomic64_inc_return(&keyconf->tx_pn); 424 crypto_hdr[0] = pn; 425 crypto_hdr[2] = 0; 426 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 427 crypto_hdr[1] = pn >> 8; 428 crypto_hdr[4] = pn >> 16; 429 crypto_hdr[5] = pn >> 24; 430 crypto_hdr[6] = pn >> 32; 431 crypto_hdr[7] = pn >> 40; 432 } 433 434 /* 435 * Sets the fields in the Tx cmd that are crypto related 436 */ 437 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 438 struct ieee80211_tx_info *info, 439 struct iwl_tx_cmd *tx_cmd, 440 struct sk_buff *skb_frag, 441 int hdrlen) 442 { 443 struct ieee80211_key_conf *keyconf = info->control.hw_key; 444 u8 *crypto_hdr = skb_frag->data + hdrlen; 445 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 446 u64 pn; 447 448 switch (keyconf->cipher) { 449 case WLAN_CIPHER_SUITE_CCMP: 450 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 451 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 452 break; 453 454 case WLAN_CIPHER_SUITE_TKIP: 455 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 456 pn = atomic64_inc_return(&keyconf->tx_pn); 457 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 458 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 459 break; 460 461 case WLAN_CIPHER_SUITE_WEP104: 462 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 463 fallthrough; 464 case WLAN_CIPHER_SUITE_WEP40: 465 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 466 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 467 TX_CMD_SEC_WEP_KEY_IDX_MSK); 468 469 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 470 break; 471 case WLAN_CIPHER_SUITE_GCMP: 472 case WLAN_CIPHER_SUITE_GCMP_256: 473 type = TX_CMD_SEC_GCMP; 474 fallthrough; 475 case WLAN_CIPHER_SUITE_CCMP_256: 476 /* TODO: Taking the key from the table might introduce a race 477 * when PTK rekeying is done, having an old packets with a PN 478 * based on the old key but the message encrypted with a new 479 * one. 480 * Need to handle this. 481 */ 482 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 483 tx_cmd->key[0] = keyconf->hw_key_idx; 484 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 485 break; 486 default: 487 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 488 } 489 } 490 491 /* 492 * Allocates and sets the Tx cmd the driver data pointers in the skb 493 */ 494 static struct iwl_device_tx_cmd * 495 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 496 struct ieee80211_tx_info *info, int hdrlen, 497 struct ieee80211_sta *sta, u8 sta_id) 498 { 499 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 500 struct iwl_device_tx_cmd *dev_cmd; 501 struct iwl_tx_cmd *tx_cmd; 502 503 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 504 505 if (unlikely(!dev_cmd)) 506 return NULL; 507 508 dev_cmd->hdr.cmd = TX_CMD; 509 510 if (iwl_mvm_has_new_tx_api(mvm)) { 511 u32 rate_n_flags = 0; 512 u16 flags = 0; 513 struct iwl_mvm_sta *mvmsta = sta ? 514 iwl_mvm_sta_from_mac80211(sta) : NULL; 515 bool amsdu = false; 516 517 if (ieee80211_is_data_qos(hdr->frame_control)) { 518 u8 *qc = ieee80211_get_qos_ctl(hdr); 519 520 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 521 } 522 523 if (!info->control.hw_key) 524 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 525 526 /* 527 * For data packets rate info comes from the fw. Only 528 * set rate/antenna during connection establishment or in case 529 * no station is given. 530 */ 531 if (!sta || !ieee80211_is_data(hdr->frame_control) || 532 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 533 flags |= IWL_TX_FLAGS_CMD_RATE; 534 rate_n_flags = 535 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 536 hdr->frame_control); 537 } 538 539 if (mvm->trans->trans_cfg->device_family >= 540 IWL_DEVICE_FAMILY_AX210) { 541 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 542 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, 543 info, amsdu); 544 545 cmd->offload_assist = cpu_to_le32(offload_assist); 546 547 /* Total # bytes to be transmitted */ 548 cmd->len = cpu_to_le16((u16)skb->len); 549 550 /* Copy MAC header from skb into command buffer */ 551 memcpy(cmd->hdr, hdr, hdrlen); 552 553 cmd->flags = cpu_to_le16(flags); 554 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 555 } else { 556 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 557 u16 offload_assist = iwl_mvm_tx_csum_pre_bz(mvm, skb, 558 info, 559 amsdu); 560 561 cmd->offload_assist = cpu_to_le16(offload_assist); 562 563 /* Total # bytes to be transmitted */ 564 cmd->len = cpu_to_le16((u16)skb->len); 565 566 /* Copy MAC header from skb into command buffer */ 567 memcpy(cmd->hdr, hdr, hdrlen); 568 569 cmd->flags = cpu_to_le32(flags); 570 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 571 } 572 goto out; 573 } 574 575 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 576 577 if (info->control.hw_key) 578 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 579 580 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 581 582 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 583 584 /* Copy MAC header from skb into command buffer */ 585 memcpy(tx_cmd->hdr, hdr, hdrlen); 586 587 out: 588 return dev_cmd; 589 } 590 591 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 592 struct iwl_device_tx_cmd *cmd) 593 { 594 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 595 596 memset(&skb_info->status, 0, sizeof(skb_info->status)); 597 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 598 599 skb_info->driver_data[1] = cmd; 600 } 601 602 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 603 struct ieee80211_tx_info *info, 604 struct ieee80211_hdr *hdr) 605 { 606 struct iwl_mvm_vif *mvmvif = 607 iwl_mvm_vif_from_mac80211(info->control.vif); 608 __le16 fc = hdr->frame_control; 609 610 switch (info->control.vif->type) { 611 case NL80211_IFTYPE_AP: 612 case NL80211_IFTYPE_ADHOC: 613 /* 614 * Non-bufferable frames use the broadcast station, thus they 615 * use the probe queue. 616 * Also take care of the case where we send a deauth to a 617 * station that we don't have, or similarly an association 618 * response (with non-success status) for a station we can't 619 * accept. 620 * Also, disassociate frames might happen, particular with 621 * reason 7 ("Class 3 frame received from nonassociated STA"). 622 */ 623 if (ieee80211_is_mgmt(fc) && 624 (!ieee80211_is_bufferable_mmpdu(fc) || 625 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 626 return mvm->probe_queue; 627 628 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 629 is_multicast_ether_addr(hdr->addr1)) 630 return mvmvif->cab_queue; 631 632 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 633 "fc=0x%02x", le16_to_cpu(fc)); 634 return mvm->probe_queue; 635 case NL80211_IFTYPE_P2P_DEVICE: 636 if (ieee80211_is_mgmt(fc)) 637 return mvm->p2p_dev_queue; 638 639 WARN_ON_ONCE(1); 640 return mvm->p2p_dev_queue; 641 default: 642 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 643 return -1; 644 } 645 } 646 647 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 648 struct sk_buff *skb) 649 { 650 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 651 struct iwl_mvm_vif *mvmvif = 652 iwl_mvm_vif_from_mac80211(info->control.vif); 653 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 654 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 655 struct iwl_probe_resp_data *resp_data; 656 const u8 *ie; 657 u8 *pos; 658 u8 match[] = { 659 (WLAN_OUI_WFA >> 16) & 0xff, 660 (WLAN_OUI_WFA >> 8) & 0xff, 661 WLAN_OUI_WFA & 0xff, 662 WLAN_OUI_TYPE_WFA_P2P, 663 }; 664 665 rcu_read_lock(); 666 667 resp_data = rcu_dereference(mvmvif->probe_resp_data); 668 if (!resp_data) 669 goto out; 670 671 if (!resp_data->notif.noa_active) 672 goto out; 673 674 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 675 mgmt->u.probe_resp.variable, 676 skb->len - base_len, 677 match, 4, 2); 678 if (!ie) { 679 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 680 goto out; 681 } 682 683 if (skb_tailroom(skb) < resp_data->noa_len) { 684 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 685 IWL_ERR(mvm, 686 "Failed to reallocate probe resp\n"); 687 goto out; 688 } 689 } 690 691 pos = skb_put(skb, resp_data->noa_len); 692 693 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 694 /* Set length of IE body (not including ID and length itself) */ 695 *pos++ = resp_data->noa_len - 2; 696 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 697 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 698 *pos++ = WLAN_OUI_WFA & 0xff; 699 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 700 701 memcpy(pos, &resp_data->notif.noa_attr, 702 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 703 704 out: 705 rcu_read_unlock(); 706 } 707 708 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 709 { 710 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 711 struct ieee80211_tx_info info; 712 struct iwl_device_tx_cmd *dev_cmd; 713 u8 sta_id; 714 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 715 __le16 fc = hdr->frame_control; 716 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 717 IEEE80211_TX_CTL_TX_OFFCHAN; 718 int queue = -1; 719 720 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 721 return -1; 722 723 memcpy(&info, skb->cb, sizeof(info)); 724 725 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 726 return -1; 727 728 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 729 return -1; 730 731 if (info.control.vif) { 732 struct iwl_mvm_vif *mvmvif = 733 iwl_mvm_vif_from_mac80211(info.control.vif); 734 735 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 736 info.control.vif->type == NL80211_IFTYPE_AP || 737 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 738 if (!ieee80211_is_data(hdr->frame_control)) 739 sta_id = mvmvif->bcast_sta.sta_id; 740 else 741 sta_id = mvmvif->mcast_sta.sta_id; 742 743 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr); 744 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 745 queue = mvm->snif_queue; 746 sta_id = mvm->snif_sta.sta_id; 747 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 748 offchannel) { 749 /* 750 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 751 * that can be used in 2 different types of vifs, P2P & 752 * STATION. 753 * P2P uses the offchannel queue. 754 * STATION (HS2.0) uses the auxiliary context of the FW, 755 * and hence needs to be sent on the aux queue. 756 */ 757 sta_id = mvm->aux_sta.sta_id; 758 queue = mvm->aux_queue; 759 } 760 } 761 762 if (queue < 0) { 763 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 764 return -1; 765 } 766 767 if (unlikely(ieee80211_is_probe_resp(fc))) 768 iwl_mvm_probe_resp_set_noa(mvm, skb); 769 770 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 771 772 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 773 if (!dev_cmd) 774 return -1; 775 776 /* From now on, we cannot access info->control */ 777 iwl_mvm_skb_prepare_status(skb, dev_cmd); 778 779 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 780 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 781 return -1; 782 } 783 784 return 0; 785 } 786 787 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 788 struct ieee80211_sta *sta, unsigned int tid) 789 { 790 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 791 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band; 792 u8 ac = tid_to_mac80211_ac[tid]; 793 unsigned int txf; 794 int lmac = iwl_mvm_get_lmac_id(mvm->fw, band); 795 796 /* For HE redirect to trigger based fifos */ 797 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 798 ac += 4; 799 800 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 801 802 /* 803 * Don't send an AMSDU that will be longer than the TXF. 804 * Add a security margin of 256 for the TX command + headers. 805 * We also want to have the start of the next packet inside the 806 * fifo to be able to send bursts. 807 */ 808 return min_t(unsigned int, mvmsta->max_amsdu_len, 809 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 810 } 811 812 #ifdef CONFIG_INET 813 814 static int 815 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 816 netdev_features_t netdev_flags, 817 struct sk_buff_head *mpdus_skb) 818 { 819 struct sk_buff *tmp, *next; 820 struct ieee80211_hdr *hdr = (void *)skb->data; 821 char cb[sizeof(skb->cb)]; 822 u16 i = 0; 823 unsigned int tcp_payload_len; 824 unsigned int mss = skb_shinfo(skb)->gso_size; 825 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 826 bool qos = ieee80211_is_data_qos(hdr->frame_control); 827 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 828 829 skb_shinfo(skb)->gso_size = num_subframes * mss; 830 memcpy(cb, skb->cb, sizeof(cb)); 831 832 next = skb_gso_segment(skb, netdev_flags); 833 skb_shinfo(skb)->gso_size = mss; 834 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 835 if (WARN_ON_ONCE(IS_ERR(next))) 836 return -EINVAL; 837 else if (next) 838 consume_skb(skb); 839 840 skb_list_walk_safe(next, tmp, next) { 841 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 842 /* 843 * Compute the length of all the data added for the A-MSDU. 844 * This will be used to compute the length to write in the TX 845 * command. We have: SNAP + IP + TCP for n -1 subframes and 846 * ETH header for n subframes. 847 */ 848 tcp_payload_len = skb_tail_pointer(tmp) - 849 skb_transport_header(tmp) - 850 tcp_hdrlen(tmp) + tmp->data_len; 851 852 if (ipv4) 853 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 854 855 if (tcp_payload_len > mss) { 856 skb_shinfo(tmp)->gso_size = mss; 857 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 : 858 SKB_GSO_TCPV6; 859 } else { 860 if (qos) { 861 u8 *qc; 862 863 if (ipv4) 864 ip_send_check(ip_hdr(tmp)); 865 866 qc = ieee80211_get_qos_ctl((void *)tmp->data); 867 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 868 } 869 skb_shinfo(tmp)->gso_size = 0; 870 } 871 872 skb_mark_not_on_list(tmp); 873 __skb_queue_tail(mpdus_skb, tmp); 874 i++; 875 } 876 877 return 0; 878 } 879 880 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 881 struct ieee80211_tx_info *info, 882 struct ieee80211_sta *sta, 883 struct sk_buff_head *mpdus_skb) 884 { 885 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 886 struct ieee80211_hdr *hdr = (void *)skb->data; 887 unsigned int mss = skb_shinfo(skb)->gso_size; 888 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 889 u16 snap_ip_tcp, pad; 890 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 891 u8 tid; 892 893 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 894 tcp_hdrlen(skb); 895 896 if (!mvmsta->max_amsdu_len || 897 !ieee80211_is_data_qos(hdr->frame_control) || 898 !mvmsta->amsdu_enabled) 899 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 900 901 /* 902 * Do not build AMSDU for IPv6 with extension headers. 903 * ask stack to segment and checkum the generated MPDUs for us. 904 */ 905 if (skb->protocol == htons(ETH_P_IPV6) && 906 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 907 IPPROTO_TCP) { 908 netdev_flags &= ~NETIF_F_CSUM_MASK; 909 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 910 } 911 912 tid = ieee80211_get_tid(hdr); 913 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 914 return -EINVAL; 915 916 /* 917 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 918 * during an BA session. 919 */ 920 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 921 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 922 !(mvmsta->amsdu_enabled & BIT(tid))) 923 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 924 925 /* 926 * Take the min of ieee80211 station and mvm station 927 */ 928 max_amsdu_len = 929 min_t(unsigned int, sta->max_amsdu_len, 930 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 931 932 /* 933 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 934 * supported. This is a spec requirement (IEEE 802.11-2015 935 * section 8.7.3 NOTE 3). 936 */ 937 if (info->flags & IEEE80211_TX_CTL_AMPDU && 938 !sta->deflink.vht_cap.vht_supported) 939 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 940 941 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 942 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 943 pad = (4 - subf_len) & 0x3; 944 945 /* 946 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 947 * N * subf_len + (N - 1) * pad. 948 */ 949 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 950 951 if (sta->max_amsdu_subframes && 952 num_subframes > sta->max_amsdu_subframes) 953 num_subframes = sta->max_amsdu_subframes; 954 955 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 956 tcp_hdrlen(skb) + skb->data_len; 957 958 /* 959 * Make sure we have enough TBs for the A-MSDU: 960 * 2 for each subframe 961 * 1 more for each fragment 962 * 1 more for the potential data in the header 963 */ 964 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 965 mvm->trans->max_skb_frags) 966 num_subframes = 1; 967 968 if (num_subframes > 1) 969 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 970 971 /* This skb fits in one single A-MSDU */ 972 if (num_subframes * mss >= tcp_payload_len) { 973 __skb_queue_tail(mpdus_skb, skb); 974 return 0; 975 } 976 977 /* 978 * Trick the segmentation function to make it 979 * create SKBs that can fit into one A-MSDU. 980 */ 981 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 982 mpdus_skb); 983 } 984 #else /* CONFIG_INET */ 985 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 986 struct ieee80211_tx_info *info, 987 struct ieee80211_sta *sta, 988 struct sk_buff_head *mpdus_skb) 989 { 990 /* Impossible to get TSO with CONFIG_INET */ 991 WARN_ON(1); 992 993 return -1; 994 } 995 #endif 996 997 /* Check if there are any timed-out TIDs on a given shared TXQ */ 998 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 999 { 1000 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1001 unsigned long now = jiffies; 1002 int tid; 1003 1004 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1005 return false; 1006 1007 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1008 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1009 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1010 return true; 1011 } 1012 1013 return false; 1014 } 1015 1016 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1017 struct iwl_mvm_sta *mvmsta, 1018 int airtime) 1019 { 1020 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1021 struct iwl_mvm_tcm_mac *mdata; 1022 1023 if (mac >= NUM_MAC_INDEX_DRIVER) 1024 return; 1025 1026 mdata = &mvm->tcm.data[mac]; 1027 1028 if (mvm->tcm.paused) 1029 return; 1030 1031 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1032 schedule_delayed_work(&mvm->tcm.work, 0); 1033 1034 mdata->tx.airtime += airtime; 1035 } 1036 1037 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1038 struct iwl_mvm_sta *mvmsta, int tid) 1039 { 1040 u32 ac = tid_to_mac80211_ac[tid]; 1041 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1042 struct iwl_mvm_tcm_mac *mdata; 1043 1044 if (mac >= NUM_MAC_INDEX_DRIVER) 1045 return -EINVAL; 1046 1047 mdata = &mvm->tcm.data[mac]; 1048 1049 mdata->tx.pkts[ac]++; 1050 1051 return 0; 1052 } 1053 1054 /* 1055 * Sets the fields in the Tx cmd that are crypto related. 1056 * 1057 * This function must be called with BHs disabled. 1058 */ 1059 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1060 struct ieee80211_tx_info *info, 1061 struct ieee80211_sta *sta) 1062 { 1063 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1064 struct iwl_mvm_sta *mvmsta; 1065 struct iwl_device_tx_cmd *dev_cmd; 1066 __le16 fc; 1067 u16 seq_number = 0; 1068 u8 tid = IWL_MAX_TID_COUNT; 1069 u16 txq_id; 1070 bool is_ampdu = false; 1071 int hdrlen; 1072 1073 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1074 fc = hdr->frame_control; 1075 hdrlen = ieee80211_hdrlen(fc); 1076 1077 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1078 return -1; 1079 1080 if (WARN_ON_ONCE(!mvmsta)) 1081 return -1; 1082 1083 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1084 return -1; 1085 1086 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he) 1087 return -1; 1088 1089 if (unlikely(ieee80211_is_probe_resp(fc))) 1090 iwl_mvm_probe_resp_set_noa(mvm, skb); 1091 1092 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1093 sta, mvmsta->sta_id); 1094 if (!dev_cmd) 1095 goto drop; 1096 1097 /* 1098 * we handle that entirely ourselves -- for uAPSD the firmware 1099 * will always send a notification, and for PS-Poll responses 1100 * we'll notify mac80211 when getting frame status 1101 */ 1102 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1103 1104 spin_lock(&mvmsta->lock); 1105 1106 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1107 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 1108 * assignment of MGMT TID 1109 */ 1110 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1111 tid = ieee80211_get_tid(hdr); 1112 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1113 goto drop_unlock_sta; 1114 1115 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1116 if (WARN_ONCE(is_ampdu && 1117 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1118 "Invalid internal agg state %d for TID %d", 1119 mvmsta->tid_data[tid].state, tid)) 1120 goto drop_unlock_sta; 1121 1122 seq_number = mvmsta->tid_data[tid].seq_number; 1123 seq_number &= IEEE80211_SCTL_SEQ; 1124 1125 if (!iwl_mvm_has_new_tx_api(mvm)) { 1126 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1127 1128 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1129 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1130 /* update the tx_cmd hdr as it was already copied */ 1131 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1132 } 1133 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) { 1134 tid = IWL_TID_NON_QOS; 1135 } 1136 1137 txq_id = mvmsta->tid_data[tid].txq_id; 1138 1139 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1140 1141 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1142 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1143 spin_unlock(&mvmsta->lock); 1144 return -1; 1145 } 1146 1147 if (!iwl_mvm_has_new_tx_api(mvm)) { 1148 /* Keep track of the time of the last frame for this RA/TID */ 1149 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1150 1151 /* 1152 * If we have timed-out TIDs - schedule the worker that will 1153 * reconfig the queues and update them 1154 * 1155 * Note that the no lock is taken here in order to not serialize 1156 * the TX flow. This isn't dangerous because scheduling 1157 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1158 * schedule it due to some race condition then next TX we get 1159 * here we will. 1160 */ 1161 if (unlikely(mvm->queue_info[txq_id].status == 1162 IWL_MVM_QUEUE_SHARED && 1163 iwl_mvm_txq_should_update(mvm, txq_id))) 1164 schedule_work(&mvm->add_stream_wk); 1165 } 1166 1167 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1168 mvmsta->sta_id, tid, txq_id, 1169 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1170 1171 /* From now on, we cannot access info->control */ 1172 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1173 1174 if (ieee80211_is_data(fc)) 1175 iwl_mvm_mei_tx_copy_to_csme(mvm, skb, 1176 info->control.hw_key ? 1177 info->control.hw_key->iv_len : 0); 1178 1179 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1180 goto drop_unlock_sta; 1181 1182 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1183 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1184 1185 spin_unlock(&mvmsta->lock); 1186 1187 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1188 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1189 goto drop; 1190 1191 return 0; 1192 1193 drop_unlock_sta: 1194 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1195 spin_unlock(&mvmsta->lock); 1196 drop: 1197 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid); 1198 return -1; 1199 } 1200 1201 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1202 struct ieee80211_sta *sta) 1203 { 1204 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1205 struct ieee80211_tx_info info; 1206 struct sk_buff_head mpdus_skbs; 1207 unsigned int payload_len; 1208 int ret; 1209 1210 if (WARN_ON_ONCE(!mvmsta)) 1211 return -1; 1212 1213 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1214 return -1; 1215 1216 memcpy(&info, skb->cb, sizeof(info)); 1217 1218 if (!skb_is_gso(skb)) 1219 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1220 1221 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1222 tcp_hdrlen(skb) + skb->data_len; 1223 1224 if (payload_len <= skb_shinfo(skb)->gso_size) 1225 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1226 1227 __skb_queue_head_init(&mpdus_skbs); 1228 1229 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1230 if (ret) 1231 return ret; 1232 1233 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1234 return ret; 1235 1236 while (!skb_queue_empty(&mpdus_skbs)) { 1237 skb = __skb_dequeue(&mpdus_skbs); 1238 1239 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1240 if (ret) { 1241 __skb_queue_purge(&mpdus_skbs); 1242 return ret; 1243 } 1244 } 1245 1246 return 0; 1247 } 1248 1249 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1250 struct ieee80211_sta *sta, u8 tid) 1251 { 1252 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1253 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1254 struct ieee80211_vif *vif = mvmsta->vif; 1255 u16 normalized_ssn; 1256 1257 lockdep_assert_held(&mvmsta->lock); 1258 1259 if ((tid_data->state == IWL_AGG_ON || 1260 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1261 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1262 /* 1263 * Now that this aggregation or DQA queue is empty tell 1264 * mac80211 so it knows we no longer have frames buffered for 1265 * the station on this TID (for the TIM bitmap calculation.) 1266 */ 1267 ieee80211_sta_set_buffered(sta, tid, false); 1268 } 1269 1270 /* 1271 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1272 * to align the wrap around of ssn so we compare relevant values. 1273 */ 1274 normalized_ssn = tid_data->ssn; 1275 if (mvm->trans->trans_cfg->gen2) 1276 normalized_ssn &= 0xff; 1277 1278 if (normalized_ssn != tid_data->next_reclaimed) 1279 return; 1280 1281 switch (tid_data->state) { 1282 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1283 IWL_DEBUG_TX_QUEUES(mvm, 1284 "Can continue addBA flow ssn = next_recl = %d\n", 1285 tid_data->next_reclaimed); 1286 tid_data->state = IWL_AGG_STARTING; 1287 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1288 break; 1289 1290 case IWL_EMPTYING_HW_QUEUE_DELBA: 1291 IWL_DEBUG_TX_QUEUES(mvm, 1292 "Can continue DELBA flow ssn = next_recl = %d\n", 1293 tid_data->next_reclaimed); 1294 tid_data->state = IWL_AGG_OFF; 1295 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1296 break; 1297 1298 default: 1299 break; 1300 } 1301 } 1302 1303 #ifdef CONFIG_IWLWIFI_DEBUG 1304 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1305 { 1306 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1307 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1308 1309 switch (status & TX_STATUS_MSK) { 1310 case TX_STATUS_SUCCESS: 1311 return "SUCCESS"; 1312 TX_STATUS_POSTPONE(DELAY); 1313 TX_STATUS_POSTPONE(FEW_BYTES); 1314 TX_STATUS_POSTPONE(BT_PRIO); 1315 TX_STATUS_POSTPONE(QUIET_PERIOD); 1316 TX_STATUS_POSTPONE(CALC_TTAK); 1317 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1318 TX_STATUS_FAIL(SHORT_LIMIT); 1319 TX_STATUS_FAIL(LONG_LIMIT); 1320 TX_STATUS_FAIL(UNDERRUN); 1321 TX_STATUS_FAIL(DRAIN_FLOW); 1322 TX_STATUS_FAIL(RFKILL_FLUSH); 1323 TX_STATUS_FAIL(LIFE_EXPIRE); 1324 TX_STATUS_FAIL(DEST_PS); 1325 TX_STATUS_FAIL(HOST_ABORTED); 1326 TX_STATUS_FAIL(BT_RETRY); 1327 TX_STATUS_FAIL(STA_INVALID); 1328 TX_STATUS_FAIL(FRAG_DROPPED); 1329 TX_STATUS_FAIL(TID_DISABLE); 1330 TX_STATUS_FAIL(FIFO_FLUSHED); 1331 TX_STATUS_FAIL(SMALL_CF_POLL); 1332 TX_STATUS_FAIL(FW_DROP); 1333 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1334 } 1335 1336 return "UNKNOWN"; 1337 1338 #undef TX_STATUS_FAIL 1339 #undef TX_STATUS_POSTPONE 1340 } 1341 #endif /* CONFIG_IWLWIFI_DEBUG */ 1342 1343 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1344 { 1345 switch (chan_width) { 1346 case RATE_MCS_CHAN_WIDTH_20: 1347 return 0; 1348 case RATE_MCS_CHAN_WIDTH_40: 1349 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1350 case RATE_MCS_CHAN_WIDTH_80: 1351 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1352 case RATE_MCS_CHAN_WIDTH_160: 1353 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1354 default: 1355 return 0; 1356 } 1357 } 1358 1359 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1360 enum nl80211_band band, 1361 struct ieee80211_tx_rate *r) 1362 { 1363 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1364 u32 rate = format == RATE_MCS_HT_MSK ? 1365 RATE_HT_MCS_INDEX(rate_n_flags) : 1366 rate_n_flags & RATE_MCS_CODE_MSK; 1367 1368 r->flags |= 1369 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1370 RATE_MCS_CHAN_WIDTH_MSK); 1371 1372 if (rate_n_flags & RATE_MCS_SGI_MSK) 1373 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1374 if (format == RATE_MCS_HT_MSK) { 1375 r->flags |= IEEE80211_TX_RC_MCS; 1376 r->idx = rate; 1377 } else if (format == RATE_MCS_VHT_MSK) { 1378 ieee80211_rate_set_vht(r, rate, 1379 ((rate_n_flags & RATE_MCS_NSS_MSK) >> 1380 RATE_MCS_NSS_POS) + 1); 1381 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1382 } else if (format == RATE_MCS_HE_MSK) { 1383 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1384 * but it only matters for radiotap */ 1385 r->idx = 0; 1386 } else { 1387 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1388 band); 1389 } 1390 } 1391 1392 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags, 1393 enum nl80211_band band, 1394 struct ieee80211_tx_rate *r) 1395 { 1396 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1397 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1398 1399 r->flags |= 1400 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1401 RATE_MCS_CHAN_WIDTH_MSK_V1); 1402 1403 if (rate_n_flags & RATE_MCS_SGI_MSK_V1) 1404 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1405 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 1406 r->flags |= IEEE80211_TX_RC_MCS; 1407 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 1408 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 1409 ieee80211_rate_set_vht( 1410 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1411 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1412 RATE_VHT_MCS_NSS_POS) + 1); 1413 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1414 } else { 1415 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1416 band); 1417 } 1418 } 1419 1420 /* 1421 * translate ucode response to mac80211 tx status control values 1422 */ 1423 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw, 1424 u32 rate_n_flags, 1425 struct ieee80211_tx_info *info) 1426 { 1427 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1428 1429 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP, 1430 TX_CMD, 0) <= 6) 1431 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1432 1433 info->status.antenna = 1434 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1435 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, 1436 info->band, r); 1437 } 1438 1439 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1440 u32 status, __le16 frame_control) 1441 { 1442 struct iwl_fw_dbg_trigger_tlv *trig; 1443 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1444 int i; 1445 1446 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1447 enum iwl_fw_ini_time_point tp = 1448 IWL_FW_INI_TIME_POINT_TX_FAILED; 1449 1450 if (ieee80211_is_action(frame_control)) 1451 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1452 1453 iwl_dbg_tlv_time_point(&mvm->fwrt, 1454 tp, NULL); 1455 return; 1456 } 1457 1458 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1459 FW_DBG_TRIGGER_TX_STATUS); 1460 if (!trig) 1461 return; 1462 1463 status_trig = (void *)trig->data; 1464 1465 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1466 /* don't collect on status 0 */ 1467 if (!status_trig->statuses[i].status) 1468 break; 1469 1470 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1471 continue; 1472 1473 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1474 "Tx status %d was received", 1475 status & TX_STATUS_MSK); 1476 break; 1477 } 1478 } 1479 1480 /* 1481 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1482 * @tx_resp: the Tx response from the fw (agg or non-agg) 1483 * 1484 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1485 * it can't know that everything will go well until the end of the AMPDU, it 1486 * can't know in advance the number of MPDUs that will be sent in the current 1487 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1488 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1489 * of the batch. This is why the SSN of the SCD is written at the end of the 1490 * whole struct at a variable offset. This function knows how to cope with the 1491 * variable offset and returns the SSN of the SCD. 1492 */ 1493 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1494 struct iwl_mvm_tx_resp *tx_resp) 1495 { 1496 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1497 tx_resp->frame_count) & 0xfff; 1498 } 1499 1500 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1501 struct iwl_rx_packet *pkt) 1502 { 1503 struct ieee80211_sta *sta; 1504 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1505 int txq_id = SEQ_TO_QUEUE(sequence); 1506 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1507 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1508 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1509 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1510 struct agg_tx_status *agg_status = 1511 iwl_mvm_get_agg_status(mvm, tx_resp); 1512 u32 status = le16_to_cpu(agg_status->status); 1513 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1514 struct sk_buff_head skbs; 1515 u8 skb_freed = 0; 1516 u8 lq_color; 1517 u16 next_reclaimed, seq_ctl; 1518 bool is_ndp = false; 1519 1520 __skb_queue_head_init(&skbs); 1521 1522 if (iwl_mvm_has_new_tx_api(mvm)) 1523 txq_id = le16_to_cpu(tx_resp->tx_queue); 1524 1525 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1526 1527 /* we can free until ssn % q.n_bd not inclusive */ 1528 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1529 1530 while (!skb_queue_empty(&skbs)) { 1531 struct sk_buff *skb = __skb_dequeue(&skbs); 1532 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1533 struct ieee80211_hdr *hdr = (void *)skb->data; 1534 bool flushed = false; 1535 1536 skb_freed++; 1537 1538 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1539 1540 memset(&info->status, 0, sizeof(info->status)); 1541 1542 /* inform mac80211 about what happened with the frame */ 1543 switch (status & TX_STATUS_MSK) { 1544 case TX_STATUS_SUCCESS: 1545 case TX_STATUS_DIRECT_DONE: 1546 info->flags |= IEEE80211_TX_STAT_ACK; 1547 break; 1548 case TX_STATUS_FAIL_FIFO_FLUSHED: 1549 case TX_STATUS_FAIL_DRAIN_FLOW: 1550 flushed = true; 1551 break; 1552 case TX_STATUS_FAIL_DEST_PS: 1553 /* the FW should have stopped the queue and not 1554 * return this status 1555 */ 1556 IWL_ERR_LIMIT(mvm, 1557 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1558 status, le16_to_cpu(hdr->frame_control)); 1559 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1560 break; 1561 default: 1562 break; 1563 } 1564 1565 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1566 ieee80211_is_mgmt(hdr->frame_control)) 1567 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1568 1569 /* 1570 * If we are freeing multiple frames, mark all the frames 1571 * but the first one as acked, since they were acknowledged 1572 * before 1573 * */ 1574 if (skb_freed > 1) 1575 info->flags |= IEEE80211_TX_STAT_ACK; 1576 1577 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1578 1579 info->status.rates[0].count = tx_resp->failure_frame + 1; 1580 1581 iwl_mvm_hwrate_to_tx_status(mvm->fw, 1582 le32_to_cpu(tx_resp->initial_rate), 1583 info); 1584 1585 /* Don't assign the converted initial_rate, because driver 1586 * TLC uses this and doesn't support the new FW rate 1587 */ 1588 info->status.status_driver_data[1] = 1589 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1590 1591 /* Single frame failure in an AMPDU queue => send BAR */ 1592 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1593 !(info->flags & IEEE80211_TX_STAT_ACK) && 1594 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1595 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1596 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1597 1598 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1599 if (ieee80211_is_back_req(hdr->frame_control)) 1600 seq_ctl = 0; 1601 else if (status != TX_STATUS_SUCCESS) 1602 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1603 1604 if (unlikely(!seq_ctl)) { 1605 /* 1606 * If it is an NDP, we can't update next_reclaim since 1607 * its sequence control is 0. Note that for that same 1608 * reason, NDPs are never sent to A-MPDU'able queues 1609 * so that we can never have more than one freed frame 1610 * for a single Tx resonse (see WARN_ON below). 1611 */ 1612 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1613 is_ndp = true; 1614 } 1615 1616 /* 1617 * TODO: this is not accurate if we are freeing more than one 1618 * packet. 1619 */ 1620 info->status.tx_time = 1621 le16_to_cpu(tx_resp->wireless_media_time); 1622 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1623 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1624 info->status.status_driver_data[0] = 1625 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1626 1627 ieee80211_tx_status(mvm->hw, skb); 1628 } 1629 1630 /* This is an aggregation queue or might become one, so we use 1631 * the ssn since: ssn = wifi seq_num % 256. 1632 * The seq_ctl is the sequence control of the packet to which 1633 * this Tx response relates. But if there is a hole in the 1634 * bitmap of the BA we received, this Tx response may allow to 1635 * reclaim the hole and all the subsequent packets that were 1636 * already acked. In that case, seq_ctl != ssn, and the next 1637 * packet to be reclaimed will be ssn and not seq_ctl. In that 1638 * case, several packets will be reclaimed even if 1639 * frame_count = 1. 1640 * 1641 * The ssn is the index (% 256) of the latest packet that has 1642 * treated (acked / dropped) + 1. 1643 */ 1644 next_reclaimed = ssn; 1645 1646 IWL_DEBUG_TX_REPLY(mvm, 1647 "TXQ %d status %s (0x%08x)\n", 1648 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1649 1650 IWL_DEBUG_TX_REPLY(mvm, 1651 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1652 le32_to_cpu(tx_resp->initial_rate), 1653 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1654 ssn, next_reclaimed, seq_ctl); 1655 1656 rcu_read_lock(); 1657 1658 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1659 /* 1660 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1661 * the firmware while we still have packets for it in the Tx queues. 1662 */ 1663 if (WARN_ON_ONCE(!sta)) 1664 goto out; 1665 1666 if (!IS_ERR(sta)) { 1667 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1668 1669 iwl_mvm_tx_airtime(mvm, mvmsta, 1670 le16_to_cpu(tx_resp->wireless_media_time)); 1671 1672 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1673 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1674 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1675 1676 if (sta->wme && tid != IWL_MGMT_TID) { 1677 struct iwl_mvm_tid_data *tid_data = 1678 &mvmsta->tid_data[tid]; 1679 bool send_eosp_ndp = false; 1680 1681 spin_lock_bh(&mvmsta->lock); 1682 1683 if (!is_ndp) { 1684 tid_data->next_reclaimed = next_reclaimed; 1685 IWL_DEBUG_TX_REPLY(mvm, 1686 "Next reclaimed packet:%d\n", 1687 next_reclaimed); 1688 } else { 1689 IWL_DEBUG_TX_REPLY(mvm, 1690 "NDP - don't update next_reclaimed\n"); 1691 } 1692 1693 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1694 1695 if (mvmsta->sleep_tx_count) { 1696 mvmsta->sleep_tx_count--; 1697 if (mvmsta->sleep_tx_count && 1698 !iwl_mvm_tid_queued(mvm, tid_data)) { 1699 /* 1700 * The number of frames in the queue 1701 * dropped to 0 even if we sent less 1702 * frames than we thought we had on the 1703 * Tx queue. 1704 * This means we had holes in the BA 1705 * window that we just filled, ask 1706 * mac80211 to send EOSP since the 1707 * firmware won't know how to do that. 1708 * Send NDP and the firmware will send 1709 * EOSP notification that will trigger 1710 * a call to ieee80211_sta_eosp(). 1711 */ 1712 send_eosp_ndp = true; 1713 } 1714 } 1715 1716 spin_unlock_bh(&mvmsta->lock); 1717 if (send_eosp_ndp) { 1718 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1719 IEEE80211_FRAME_RELEASE_UAPSD, 1720 1, tid, false, false); 1721 mvmsta->sleep_tx_count = 0; 1722 ieee80211_send_eosp_nullfunc(sta, tid); 1723 } 1724 } 1725 1726 if (mvmsta->next_status_eosp) { 1727 mvmsta->next_status_eosp = false; 1728 ieee80211_sta_eosp(sta); 1729 } 1730 } 1731 out: 1732 rcu_read_unlock(); 1733 } 1734 1735 #ifdef CONFIG_IWLWIFI_DEBUG 1736 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1737 static const char *iwl_get_agg_tx_status(u16 status) 1738 { 1739 switch (status & AGG_TX_STATE_STATUS_MSK) { 1740 AGG_TX_STATE_(TRANSMITTED); 1741 AGG_TX_STATE_(UNDERRUN); 1742 AGG_TX_STATE_(BT_PRIO); 1743 AGG_TX_STATE_(FEW_BYTES); 1744 AGG_TX_STATE_(ABORT); 1745 AGG_TX_STATE_(TX_ON_AIR_DROP); 1746 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1747 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1748 AGG_TX_STATE_(SCD_QUERY); 1749 AGG_TX_STATE_(TEST_BAD_CRC32); 1750 AGG_TX_STATE_(RESPONSE); 1751 AGG_TX_STATE_(DUMP_TX); 1752 AGG_TX_STATE_(DELAY_TX); 1753 } 1754 1755 return "UNKNOWN"; 1756 } 1757 1758 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1759 struct iwl_rx_packet *pkt) 1760 { 1761 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1762 struct agg_tx_status *frame_status = 1763 iwl_mvm_get_agg_status(mvm, tx_resp); 1764 int i; 1765 bool tirgger_timepoint = false; 1766 1767 for (i = 0; i < tx_resp->frame_count; i++) { 1768 u16 fstatus = le16_to_cpu(frame_status[i].status); 1769 /* In case one frame wasn't transmitted trigger time point */ 1770 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1771 AGG_TX_STATE_TRANSMITTED); 1772 IWL_DEBUG_TX_REPLY(mvm, 1773 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1774 iwl_get_agg_tx_status(fstatus), 1775 fstatus & AGG_TX_STATE_STATUS_MSK, 1776 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1777 AGG_TX_STATE_TRY_CNT_POS, 1778 le16_to_cpu(frame_status[i].sequence)); 1779 } 1780 1781 if (tirgger_timepoint) 1782 iwl_dbg_tlv_time_point(&mvm->fwrt, 1783 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1784 1785 } 1786 #else 1787 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1788 struct iwl_rx_packet *pkt) 1789 {} 1790 #endif /* CONFIG_IWLWIFI_DEBUG */ 1791 1792 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1793 struct iwl_rx_packet *pkt) 1794 { 1795 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1796 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1797 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1798 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1799 struct iwl_mvm_sta *mvmsta; 1800 int queue = SEQ_TO_QUEUE(sequence); 1801 struct ieee80211_sta *sta; 1802 1803 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1804 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1805 return; 1806 1807 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1808 1809 rcu_read_lock(); 1810 1811 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1812 1813 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1814 if (WARN_ON_ONCE(!sta || !sta->wme)) { 1815 rcu_read_unlock(); 1816 return; 1817 } 1818 1819 if (!WARN_ON_ONCE(!mvmsta)) { 1820 mvmsta->tid_data[tid].rate_n_flags = 1821 le32_to_cpu(tx_resp->initial_rate); 1822 mvmsta->tid_data[tid].tx_time = 1823 le16_to_cpu(tx_resp->wireless_media_time); 1824 mvmsta->tid_data[tid].lq_color = 1825 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1826 iwl_mvm_tx_airtime(mvm, mvmsta, 1827 le16_to_cpu(tx_resp->wireless_media_time)); 1828 } 1829 1830 rcu_read_unlock(); 1831 } 1832 1833 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1834 { 1835 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1836 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1837 1838 if (tx_resp->frame_count == 1) 1839 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1840 else 1841 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1842 } 1843 1844 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1845 int txq, int index, 1846 struct ieee80211_tx_info *tx_info, u32 rate, 1847 bool is_flush) 1848 { 1849 struct sk_buff_head reclaimed_skbs; 1850 struct iwl_mvm_tid_data *tid_data = NULL; 1851 struct ieee80211_sta *sta; 1852 struct iwl_mvm_sta *mvmsta = NULL; 1853 struct sk_buff *skb; 1854 int freed; 1855 1856 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1857 tid > IWL_MAX_TID_COUNT, 1858 "sta_id %d tid %d", sta_id, tid)) 1859 return; 1860 1861 rcu_read_lock(); 1862 1863 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1864 1865 /* Reclaiming frames for a station that has been deleted ? */ 1866 if (WARN_ON_ONCE(!sta)) { 1867 rcu_read_unlock(); 1868 return; 1869 } 1870 1871 __skb_queue_head_init(&reclaimed_skbs); 1872 1873 /* 1874 * Release all TFDs before the SSN, i.e. all TFDs in front of 1875 * block-ack window (we assume that they've been successfully 1876 * transmitted ... if not, it's too late anyway). 1877 */ 1878 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1879 1880 skb_queue_walk(&reclaimed_skbs, skb) { 1881 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1882 1883 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1884 1885 memset(&info->status, 0, sizeof(info->status)); 1886 /* Packet was transmitted successfully, failures come as single 1887 * frames because before failing a frame the firmware transmits 1888 * it without aggregation at least once. 1889 */ 1890 if (!is_flush) 1891 info->flags |= IEEE80211_TX_STAT_ACK; 1892 } 1893 1894 /* 1895 * It's possible to get a BA response after invalidating the rcu (rcu is 1896 * invalidated in order to prevent new Tx from being sent, but there may 1897 * be some frames already in-flight). 1898 * In this case we just want to reclaim, and could skip all the 1899 * sta-dependent stuff since it's in the middle of being removed 1900 * anyways. 1901 */ 1902 if (IS_ERR(sta)) 1903 goto out; 1904 1905 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1906 tid_data = &mvmsta->tid_data[tid]; 1907 1908 if (tid_data->txq_id != txq) { 1909 IWL_ERR(mvm, 1910 "invalid reclaim request: Q %d, tid %d\n", 1911 tid_data->txq_id, tid); 1912 rcu_read_unlock(); 1913 return; 1914 } 1915 1916 spin_lock_bh(&mvmsta->lock); 1917 1918 tid_data->next_reclaimed = index; 1919 1920 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1921 1922 freed = 0; 1923 1924 /* pack lq color from tid_data along the reduced txp */ 1925 tx_info->status.status_driver_data[0] = 1926 RS_DRV_DATA_PACK(tid_data->lq_color, 1927 tx_info->status.status_driver_data[0]); 1928 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1929 1930 skb_queue_walk(&reclaimed_skbs, skb) { 1931 struct ieee80211_hdr *hdr = (void *)skb->data; 1932 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1933 1934 if (!is_flush) { 1935 if (ieee80211_is_data_qos(hdr->frame_control)) 1936 freed++; 1937 else 1938 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1939 } 1940 1941 /* this is the first skb we deliver in this batch */ 1942 /* put the rate scaling data there */ 1943 if (freed == 1) { 1944 info->flags |= IEEE80211_TX_STAT_AMPDU; 1945 memcpy(&info->status, &tx_info->status, 1946 sizeof(tx_info->status)); 1947 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info); 1948 } 1949 } 1950 1951 spin_unlock_bh(&mvmsta->lock); 1952 1953 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1954 * possible (i.e. first MPDU in the aggregation wasn't acked) 1955 * Still it's important to update RS about sent vs. acked. 1956 */ 1957 if (!is_flush && skb_queue_empty(&reclaimed_skbs)) { 1958 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1959 1960 if (mvmsta->vif) 1961 chanctx_conf = 1962 rcu_dereference(mvmsta->vif->chanctx_conf); 1963 1964 if (WARN_ON_ONCE(!chanctx_conf)) 1965 goto out; 1966 1967 tx_info->band = chanctx_conf->def.chan->band; 1968 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info); 1969 1970 if (!iwl_mvm_has_tlc_offload(mvm)) { 1971 IWL_DEBUG_TX_REPLY(mvm, 1972 "No reclaim. Update rs directly\n"); 1973 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 1974 } 1975 } 1976 1977 out: 1978 rcu_read_unlock(); 1979 1980 while (!skb_queue_empty(&reclaimed_skbs)) { 1981 skb = __skb_dequeue(&reclaimed_skbs); 1982 ieee80211_tx_status(mvm->hw, skb); 1983 } 1984 } 1985 1986 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1987 { 1988 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1989 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 1990 int sta_id, tid, txq, index; 1991 struct ieee80211_tx_info ba_info = {}; 1992 struct iwl_mvm_ba_notif *ba_notif; 1993 struct iwl_mvm_tid_data *tid_data; 1994 struct iwl_mvm_sta *mvmsta; 1995 1996 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1997 1998 if (iwl_mvm_has_new_tx_api(mvm)) { 1999 struct iwl_mvm_compressed_ba_notif *ba_res = 2000 (void *)pkt->data; 2001 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 2002 u16 tfd_cnt; 2003 int i; 2004 2005 if (unlikely(sizeof(*ba_res) > pkt_len)) 2006 return; 2007 2008 sta_id = ba_res->sta_id; 2009 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 2010 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 2011 ba_info.status.tx_time = 2012 (u16)le32_to_cpu(ba_res->wireless_time); 2013 ba_info.status.status_driver_data[0] = 2014 (void *)(uintptr_t)ba_res->reduced_txp; 2015 2016 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 2017 if (!tfd_cnt || struct_size(ba_res, tfd, tfd_cnt) > pkt_len) 2018 return; 2019 2020 rcu_read_lock(); 2021 2022 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2023 /* 2024 * It's possible to get a BA response after invalidating the rcu 2025 * (rcu is invalidated in order to prevent new Tx from being 2026 * sent, but there may be some frames already in-flight). 2027 * In this case we just want to reclaim, and could skip all the 2028 * sta-dependent stuff since it's in the middle of being removed 2029 * anyways. 2030 */ 2031 2032 /* Free per TID */ 2033 for (i = 0; i < tfd_cnt; i++) { 2034 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 2035 &ba_res->tfd[i]; 2036 2037 tid = ba_tfd->tid; 2038 if (tid == IWL_MGMT_TID) 2039 tid = IWL_MAX_TID_COUNT; 2040 2041 if (mvmsta) 2042 mvmsta->tid_data[i].lq_color = lq_color; 2043 2044 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 2045 (int)(le16_to_cpu(ba_tfd->q_num)), 2046 le16_to_cpu(ba_tfd->tfd_index), 2047 &ba_info, 2048 le32_to_cpu(ba_res->tx_rate), false); 2049 } 2050 2051 if (mvmsta) 2052 iwl_mvm_tx_airtime(mvm, mvmsta, 2053 le32_to_cpu(ba_res->wireless_time)); 2054 rcu_read_unlock(); 2055 2056 IWL_DEBUG_TX_REPLY(mvm, 2057 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2058 sta_id, le32_to_cpu(ba_res->flags), 2059 le16_to_cpu(ba_res->txed), 2060 le16_to_cpu(ba_res->done)); 2061 return; 2062 } 2063 2064 ba_notif = (void *)pkt->data; 2065 sta_id = ba_notif->sta_id; 2066 tid = ba_notif->tid; 2067 /* "flow" corresponds to Tx queue */ 2068 txq = le16_to_cpu(ba_notif->scd_flow); 2069 /* "ssn" is start of block-ack Tx window, corresponds to index 2070 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2071 index = le16_to_cpu(ba_notif->scd_ssn); 2072 2073 rcu_read_lock(); 2074 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2075 if (WARN_ON_ONCE(!mvmsta)) { 2076 rcu_read_unlock(); 2077 return; 2078 } 2079 2080 tid_data = &mvmsta->tid_data[tid]; 2081 2082 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2083 ba_info.status.ampdu_len = ba_notif->txed; 2084 ba_info.status.tx_time = tid_data->tx_time; 2085 ba_info.status.status_driver_data[0] = 2086 (void *)(uintptr_t)ba_notif->reduced_txp; 2087 2088 rcu_read_unlock(); 2089 2090 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2091 tid_data->rate_n_flags, false); 2092 2093 IWL_DEBUG_TX_REPLY(mvm, 2094 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2095 ba_notif->sta_addr, ba_notif->sta_id); 2096 2097 IWL_DEBUG_TX_REPLY(mvm, 2098 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2099 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2100 le64_to_cpu(ba_notif->bitmap), txq, index, 2101 ba_notif->txed, ba_notif->txed_2_done); 2102 2103 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2104 ba_notif->reduced_txp); 2105 } 2106 2107 /* 2108 * Note that there are transports that buffer frames before they reach 2109 * the firmware. This means that after flush_tx_path is called, the 2110 * queue might not be empty. The race-free way to handle this is to: 2111 * 1) set the station as draining 2112 * 2) flush the Tx path 2113 * 3) wait for the transport queues to be empty 2114 */ 2115 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2116 { 2117 int ret; 2118 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2119 .queues_ctl = cpu_to_le32(tfd_msk), 2120 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2121 }; 2122 2123 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2124 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2125 sizeof(flush_cmd), &flush_cmd); 2126 if (ret) 2127 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2128 return ret; 2129 } 2130 2131 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2132 { 2133 int ret; 2134 struct iwl_tx_path_flush_cmd_rsp *rsp; 2135 struct iwl_tx_path_flush_cmd flush_cmd = { 2136 .sta_id = cpu_to_le32(sta_id), 2137 .tid_mask = cpu_to_le16(tids), 2138 }; 2139 2140 struct iwl_host_cmd cmd = { 2141 .id = TXPATH_FLUSH, 2142 .len = { sizeof(flush_cmd), }, 2143 .data = { &flush_cmd, }, 2144 }; 2145 2146 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2147 2148 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2149 cmd.flags |= CMD_WANT_SKB; 2150 2151 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2152 sta_id, tids); 2153 2154 ret = iwl_mvm_send_cmd(mvm, &cmd); 2155 2156 if (ret) { 2157 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2158 return ret; 2159 } 2160 2161 if (cmd.flags & CMD_WANT_SKB) { 2162 int i; 2163 int num_flushed_queues; 2164 2165 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2166 ret = -EIO; 2167 goto free_rsp; 2168 } 2169 2170 rsp = (void *)cmd.resp_pkt->data; 2171 2172 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2173 "sta_id %d != rsp_sta_id %d", 2174 sta_id, le16_to_cpu(rsp->sta_id))) { 2175 ret = -EIO; 2176 goto free_rsp; 2177 } 2178 2179 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2180 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2181 "num_flushed_queues %d", num_flushed_queues)) { 2182 ret = -EIO; 2183 goto free_rsp; 2184 } 2185 2186 for (i = 0; i < num_flushed_queues; i++) { 2187 struct ieee80211_tx_info tx_info = {}; 2188 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2189 int tid = le16_to_cpu(queue_info->tid); 2190 int read_before = le16_to_cpu(queue_info->read_before_flush); 2191 int read_after = le16_to_cpu(queue_info->read_after_flush); 2192 int queue_num = le16_to_cpu(queue_info->queue_num); 2193 2194 if (tid == IWL_MGMT_TID) 2195 tid = IWL_MAX_TID_COUNT; 2196 2197 IWL_DEBUG_TX_QUEUES(mvm, 2198 "tid %d queue_id %d read-before %d read-after %d\n", 2199 tid, queue_num, read_before, read_after); 2200 2201 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2202 &tx_info, 0, true); 2203 } 2204 free_rsp: 2205 iwl_free_resp(&cmd); 2206 } 2207 return ret; 2208 } 2209 2210 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal) 2211 { 2212 struct iwl_mvm_int_sta *int_sta = sta; 2213 struct iwl_mvm_sta *mvm_sta = sta; 2214 2215 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != 2216 offsetof(struct iwl_mvm_sta, sta_id)); 2217 2218 if (iwl_mvm_has_new_tx_api(mvm)) 2219 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xffff); 2220 2221 if (internal) 2222 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk); 2223 2224 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk); 2225 } 2226