1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2022 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 (mvm->trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_BZ && 188 CSR_HW_REV_TYPE(mvm->trans->hw_rev) == IWL_CFG_MAC_TYPE_GL && 189 mvm->trans->hw_rev_step == SILICON_A_STEP)) 190 return iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu); 191 return iwl_mvm_tx_csum_bz(mvm, skb, amsdu); 192 } 193 194 /* 195 * Sets most of the Tx cmd's fields 196 */ 197 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 198 struct iwl_tx_cmd *tx_cmd, 199 struct ieee80211_tx_info *info, u8 sta_id) 200 { 201 struct ieee80211_hdr *hdr = (void *)skb->data; 202 __le16 fc = hdr->frame_control; 203 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 204 u32 len = skb->len + FCS_LEN; 205 bool amsdu = false; 206 u8 ac; 207 208 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) || 209 (ieee80211_is_probe_resp(fc) && 210 !is_multicast_ether_addr(hdr->addr1))) 211 tx_flags |= TX_CMD_FLG_ACK; 212 else 213 tx_flags &= ~TX_CMD_FLG_ACK; 214 215 if (ieee80211_is_probe_resp(fc)) 216 tx_flags |= TX_CMD_FLG_TSF; 217 218 if (ieee80211_has_morefrags(fc)) 219 tx_flags |= TX_CMD_FLG_MORE_FRAG; 220 221 if (ieee80211_is_data_qos(fc)) { 222 u8 *qc = ieee80211_get_qos_ctl(hdr); 223 tx_cmd->tid_tspec = qc[0] & 0xf; 224 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 225 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 226 } else if (ieee80211_is_back_req(fc)) { 227 struct ieee80211_bar *bar = (void *)skb->data; 228 u16 control = le16_to_cpu(bar->control); 229 u16 ssn = le16_to_cpu(bar->start_seq_num); 230 231 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 232 tx_cmd->tid_tspec = (control & 233 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 234 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 235 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 236 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 237 ssn); 238 } else { 239 if (ieee80211_is_data(fc)) 240 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 241 else 242 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT; 243 244 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 245 tx_flags |= TX_CMD_FLG_SEQ_CTL; 246 else 247 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 248 } 249 250 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */ 251 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 252 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 253 else 254 ac = tid_to_mac80211_ac[0]; 255 256 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 257 TX_CMD_FLG_BT_PRIO_POS; 258 259 if (ieee80211_is_mgmt(fc)) { 260 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 261 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 262 else if (ieee80211_is_action(fc)) 263 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 264 else 265 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 266 267 /* The spec allows Action frames in A-MPDU, we don't support 268 * it 269 */ 270 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 271 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 272 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 273 } else { 274 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 275 } 276 277 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 278 !is_multicast_ether_addr(hdr->addr1)) 279 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 280 281 if (fw_has_capa(&mvm->fw->ucode_capa, 282 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 283 ieee80211_action_contains_tpc(skb)) 284 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 285 286 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 287 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 288 tx_cmd->len = cpu_to_le16((u16)skb->len); 289 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 290 tx_cmd->sta_id = sta_id; 291 292 tx_cmd->offload_assist = 293 cpu_to_le16(iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu)); 294 } 295 296 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, 297 struct ieee80211_tx_info *info, 298 struct ieee80211_sta *sta, __le16 fc) 299 { 300 if (info->band == NL80211_BAND_2GHZ && 301 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 302 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 303 304 if (sta && ieee80211_is_data(fc)) { 305 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 306 307 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS; 308 } 309 310 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 311 } 312 313 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 314 struct ieee80211_tx_info *info, 315 struct ieee80211_sta *sta, __le16 fc) 316 { 317 int rate_idx = -1; 318 u8 rate_plcp; 319 u32 rate_flags = 0; 320 bool is_cck; 321 322 /* info->control is only relevant for non HW rate control */ 323 if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { 324 /* HT rate doesn't make sense for a non data frame */ 325 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && 326 !ieee80211_is_data(fc), 327 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", 328 info->control.rates[0].flags, 329 info->control.rates[0].idx, 330 le16_to_cpu(fc), 331 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 332 333 rate_idx = info->control.rates[0].idx; 334 } 335 336 /* if the rate isn't a well known legacy rate, take the lowest one */ 337 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 338 rate_idx = rate_lowest_index( 339 &mvm->nvm_data->bands[info->band], sta); 340 341 /* 342 * For non 2 GHZ band, remap mac80211 rate 343 * indices into driver indices 344 */ 345 if (info->band != NL80211_BAND_2GHZ) 346 rate_idx += IWL_FIRST_OFDM_RATE; 347 348 /* For 2.4 GHZ band, check that there is no need to remap */ 349 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 350 351 /* Get PLCP rate for tx_cmd->rate_n_flags */ 352 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx); 353 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE); 354 355 /* Set CCK or OFDM flag */ 356 if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) { 357 if (!is_cck) 358 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK; 359 else 360 rate_flags |= RATE_MCS_CCK_MSK; 361 } else if (is_cck) { 362 rate_flags |= RATE_MCS_CCK_MSK_V1; 363 } 364 365 return (u32)rate_plcp | rate_flags; 366 } 367 368 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 369 struct ieee80211_tx_info *info, 370 struct ieee80211_sta *sta, __le16 fc) 371 { 372 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) | 373 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 374 } 375 376 /* 377 * Sets the fields in the Tx cmd that are rate related 378 */ 379 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 380 struct ieee80211_tx_info *info, 381 struct ieee80211_sta *sta, __le16 fc) 382 { 383 /* Set retry limit on RTS packets */ 384 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 385 386 /* Set retry limit on DATA packets and Probe Responses*/ 387 if (ieee80211_is_probe_resp(fc)) { 388 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 389 tx_cmd->rts_retry_limit = 390 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 391 } else if (ieee80211_is_back_req(fc)) { 392 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 393 } else { 394 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 395 } 396 397 /* 398 * for data packets, rate info comes from the table inside the fw. This 399 * table is controlled by LINK_QUALITY commands 400 */ 401 402 if (ieee80211_is_data(fc) && sta) { 403 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 404 405 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 406 tx_cmd->initial_rate_index = 0; 407 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 408 return; 409 } 410 } else if (ieee80211_is_back_req(fc)) { 411 tx_cmd->tx_flags |= 412 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 413 } 414 415 /* Set the rate in the TX cmd */ 416 tx_cmd->rate_n_flags = 417 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 418 } 419 420 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 421 u8 *crypto_hdr) 422 { 423 struct ieee80211_key_conf *keyconf = info->control.hw_key; 424 u64 pn; 425 426 pn = atomic64_inc_return(&keyconf->tx_pn); 427 crypto_hdr[0] = pn; 428 crypto_hdr[2] = 0; 429 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 430 crypto_hdr[1] = pn >> 8; 431 crypto_hdr[4] = pn >> 16; 432 crypto_hdr[5] = pn >> 24; 433 crypto_hdr[6] = pn >> 32; 434 crypto_hdr[7] = pn >> 40; 435 } 436 437 /* 438 * Sets the fields in the Tx cmd that are crypto related 439 */ 440 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 441 struct ieee80211_tx_info *info, 442 struct iwl_tx_cmd *tx_cmd, 443 struct sk_buff *skb_frag, 444 int hdrlen) 445 { 446 struct ieee80211_key_conf *keyconf = info->control.hw_key; 447 u8 *crypto_hdr = skb_frag->data + hdrlen; 448 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 449 u64 pn; 450 451 switch (keyconf->cipher) { 452 case WLAN_CIPHER_SUITE_CCMP: 453 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 454 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 455 break; 456 457 case WLAN_CIPHER_SUITE_TKIP: 458 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 459 pn = atomic64_inc_return(&keyconf->tx_pn); 460 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 461 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 462 break; 463 464 case WLAN_CIPHER_SUITE_WEP104: 465 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 466 fallthrough; 467 case WLAN_CIPHER_SUITE_WEP40: 468 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 469 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 470 TX_CMD_SEC_WEP_KEY_IDX_MSK); 471 472 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 473 break; 474 case WLAN_CIPHER_SUITE_GCMP: 475 case WLAN_CIPHER_SUITE_GCMP_256: 476 type = TX_CMD_SEC_GCMP; 477 fallthrough; 478 case WLAN_CIPHER_SUITE_CCMP_256: 479 /* TODO: Taking the key from the table might introduce a race 480 * when PTK rekeying is done, having an old packets with a PN 481 * based on the old key but the message encrypted with a new 482 * one. 483 * Need to handle this. 484 */ 485 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 486 tx_cmd->key[0] = keyconf->hw_key_idx; 487 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 488 break; 489 default: 490 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 491 } 492 } 493 494 /* 495 * Allocates and sets the Tx cmd the driver data pointers in the skb 496 */ 497 static struct iwl_device_tx_cmd * 498 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 499 struct ieee80211_tx_info *info, int hdrlen, 500 struct ieee80211_sta *sta, u8 sta_id) 501 { 502 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 503 struct iwl_device_tx_cmd *dev_cmd; 504 struct iwl_tx_cmd *tx_cmd; 505 506 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 507 508 if (unlikely(!dev_cmd)) 509 return NULL; 510 511 dev_cmd->hdr.cmd = TX_CMD; 512 513 if (iwl_mvm_has_new_tx_api(mvm)) { 514 u32 rate_n_flags = 0; 515 u16 flags = 0; 516 struct iwl_mvm_sta *mvmsta = sta ? 517 iwl_mvm_sta_from_mac80211(sta) : NULL; 518 bool amsdu = false; 519 520 if (ieee80211_is_data_qos(hdr->frame_control)) { 521 u8 *qc = ieee80211_get_qos_ctl(hdr); 522 523 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 524 } 525 526 if (!info->control.hw_key) 527 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 528 529 /* 530 * For data packets rate info comes from the fw. Only 531 * set rate/antenna during connection establishment or in case 532 * no station is given. 533 */ 534 if (!sta || !ieee80211_is_data(hdr->frame_control) || 535 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 536 flags |= IWL_TX_FLAGS_CMD_RATE; 537 rate_n_flags = 538 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 539 hdr->frame_control); 540 } 541 542 if (mvm->trans->trans_cfg->device_family >= 543 IWL_DEVICE_FAMILY_AX210) { 544 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 545 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, 546 info, amsdu); 547 548 cmd->offload_assist = cpu_to_le32(offload_assist); 549 550 /* Total # bytes to be transmitted */ 551 cmd->len = cpu_to_le16((u16)skb->len); 552 553 /* Copy MAC header from skb into command buffer */ 554 memcpy(cmd->hdr, hdr, hdrlen); 555 556 cmd->flags = cpu_to_le16(flags); 557 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 558 } else { 559 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 560 u16 offload_assist = iwl_mvm_tx_csum_pre_bz(mvm, skb, 561 info, 562 amsdu); 563 564 cmd->offload_assist = cpu_to_le16(offload_assist); 565 566 /* Total # bytes to be transmitted */ 567 cmd->len = cpu_to_le16((u16)skb->len); 568 569 /* Copy MAC header from skb into command buffer */ 570 memcpy(cmd->hdr, hdr, hdrlen); 571 572 cmd->flags = cpu_to_le32(flags); 573 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 574 } 575 goto out; 576 } 577 578 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 579 580 if (info->control.hw_key) 581 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 582 583 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 584 585 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 586 587 /* Copy MAC header from skb into command buffer */ 588 memcpy(tx_cmd->hdr, hdr, hdrlen); 589 590 out: 591 return dev_cmd; 592 } 593 594 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 595 struct iwl_device_tx_cmd *cmd) 596 { 597 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 598 599 memset(&skb_info->status, 0, sizeof(skb_info->status)); 600 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 601 602 skb_info->driver_data[1] = cmd; 603 } 604 605 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 606 struct ieee80211_tx_info *info, 607 struct ieee80211_hdr *hdr) 608 { 609 struct iwl_mvm_vif *mvmvif = 610 iwl_mvm_vif_from_mac80211(info->control.vif); 611 __le16 fc = hdr->frame_control; 612 613 switch (info->control.vif->type) { 614 case NL80211_IFTYPE_AP: 615 case NL80211_IFTYPE_ADHOC: 616 /* 617 * Non-bufferable frames use the broadcast station, thus they 618 * use the probe queue. 619 * Also take care of the case where we send a deauth to a 620 * station that we don't have, or similarly an association 621 * response (with non-success status) for a station we can't 622 * accept. 623 * Also, disassociate frames might happen, particular with 624 * reason 7 ("Class 3 frame received from nonassociated STA"). 625 */ 626 if (ieee80211_is_mgmt(fc) && 627 (!ieee80211_is_bufferable_mmpdu(fc) || 628 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 629 return mvm->probe_queue; 630 631 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 632 is_multicast_ether_addr(hdr->addr1)) 633 return mvmvif->cab_queue; 634 635 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 636 "fc=0x%02x", le16_to_cpu(fc)); 637 return mvm->probe_queue; 638 case NL80211_IFTYPE_P2P_DEVICE: 639 if (ieee80211_is_mgmt(fc)) 640 return mvm->p2p_dev_queue; 641 642 WARN_ON_ONCE(1); 643 return mvm->p2p_dev_queue; 644 default: 645 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 646 return -1; 647 } 648 } 649 650 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 651 struct sk_buff *skb) 652 { 653 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 654 struct iwl_mvm_vif *mvmvif = 655 iwl_mvm_vif_from_mac80211(info->control.vif); 656 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 657 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 658 struct iwl_probe_resp_data *resp_data; 659 const u8 *ie; 660 u8 *pos; 661 u8 match[] = { 662 (WLAN_OUI_WFA >> 16) & 0xff, 663 (WLAN_OUI_WFA >> 8) & 0xff, 664 WLAN_OUI_WFA & 0xff, 665 WLAN_OUI_TYPE_WFA_P2P, 666 }; 667 668 rcu_read_lock(); 669 670 resp_data = rcu_dereference(mvmvif->probe_resp_data); 671 if (!resp_data) 672 goto out; 673 674 if (!resp_data->notif.noa_active) 675 goto out; 676 677 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 678 mgmt->u.probe_resp.variable, 679 skb->len - base_len, 680 match, 4, 2); 681 if (!ie) { 682 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 683 goto out; 684 } 685 686 if (skb_tailroom(skb) < resp_data->noa_len) { 687 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 688 IWL_ERR(mvm, 689 "Failed to reallocate probe resp\n"); 690 goto out; 691 } 692 } 693 694 pos = skb_put(skb, resp_data->noa_len); 695 696 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 697 /* Set length of IE body (not including ID and length itself) */ 698 *pos++ = resp_data->noa_len - 2; 699 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 700 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 701 *pos++ = WLAN_OUI_WFA & 0xff; 702 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 703 704 memcpy(pos, &resp_data->notif.noa_attr, 705 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 706 707 out: 708 rcu_read_unlock(); 709 } 710 711 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 712 { 713 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 714 struct ieee80211_tx_info info; 715 struct iwl_device_tx_cmd *dev_cmd; 716 u8 sta_id; 717 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 718 __le16 fc = hdr->frame_control; 719 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 720 IEEE80211_TX_CTL_TX_OFFCHAN; 721 int queue = -1; 722 723 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 724 return -1; 725 726 memcpy(&info, skb->cb, sizeof(info)); 727 728 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 729 return -1; 730 731 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 732 return -1; 733 734 if (info.control.vif) { 735 struct iwl_mvm_vif *mvmvif = 736 iwl_mvm_vif_from_mac80211(info.control.vif); 737 738 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 739 info.control.vif->type == NL80211_IFTYPE_AP || 740 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 741 if (!ieee80211_is_data(hdr->frame_control)) 742 sta_id = mvmvif->bcast_sta.sta_id; 743 else 744 sta_id = mvmvif->mcast_sta.sta_id; 745 746 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr); 747 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 748 queue = mvm->snif_queue; 749 sta_id = mvm->snif_sta.sta_id; 750 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 751 offchannel) { 752 /* 753 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 754 * that can be used in 2 different types of vifs, P2P & 755 * STATION. 756 * P2P uses the offchannel queue. 757 * STATION (HS2.0) uses the auxiliary context of the FW, 758 * and hence needs to be sent on the aux queue. 759 */ 760 sta_id = mvm->aux_sta.sta_id; 761 queue = mvm->aux_queue; 762 } 763 } 764 765 if (queue < 0) { 766 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 767 return -1; 768 } 769 770 if (unlikely(ieee80211_is_probe_resp(fc))) 771 iwl_mvm_probe_resp_set_noa(mvm, skb); 772 773 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 774 775 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 776 if (!dev_cmd) 777 return -1; 778 779 /* From now on, we cannot access info->control */ 780 iwl_mvm_skb_prepare_status(skb, dev_cmd); 781 782 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 783 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 784 return -1; 785 } 786 787 return 0; 788 } 789 790 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 791 struct ieee80211_sta *sta, unsigned int tid) 792 { 793 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 794 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band; 795 u8 ac = tid_to_mac80211_ac[tid]; 796 unsigned int txf; 797 int lmac = iwl_mvm_get_lmac_id(mvm->fw, band); 798 799 /* For HE redirect to trigger based fifos */ 800 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 801 ac += 4; 802 803 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 804 805 /* 806 * Don't send an AMSDU that will be longer than the TXF. 807 * Add a security margin of 256 for the TX command + headers. 808 * We also want to have the start of the next packet inside the 809 * fifo to be able to send bursts. 810 */ 811 return min_t(unsigned int, mvmsta->max_amsdu_len, 812 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 813 } 814 815 #ifdef CONFIG_INET 816 817 static int 818 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 819 netdev_features_t netdev_flags, 820 struct sk_buff_head *mpdus_skb) 821 { 822 struct sk_buff *tmp, *next; 823 struct ieee80211_hdr *hdr = (void *)skb->data; 824 char cb[sizeof(skb->cb)]; 825 u16 i = 0; 826 unsigned int tcp_payload_len; 827 unsigned int mss = skb_shinfo(skb)->gso_size; 828 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 829 bool qos = ieee80211_is_data_qos(hdr->frame_control); 830 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 831 832 skb_shinfo(skb)->gso_size = num_subframes * mss; 833 memcpy(cb, skb->cb, sizeof(cb)); 834 835 next = skb_gso_segment(skb, netdev_flags); 836 skb_shinfo(skb)->gso_size = mss; 837 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 838 if (WARN_ON_ONCE(IS_ERR(next))) 839 return -EINVAL; 840 else if (next) 841 consume_skb(skb); 842 843 skb_list_walk_safe(next, tmp, next) { 844 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 845 /* 846 * Compute the length of all the data added for the A-MSDU. 847 * This will be used to compute the length to write in the TX 848 * command. We have: SNAP + IP + TCP for n -1 subframes and 849 * ETH header for n subframes. 850 */ 851 tcp_payload_len = skb_tail_pointer(tmp) - 852 skb_transport_header(tmp) - 853 tcp_hdrlen(tmp) + tmp->data_len; 854 855 if (ipv4) 856 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 857 858 if (tcp_payload_len > mss) { 859 skb_shinfo(tmp)->gso_size = mss; 860 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 : 861 SKB_GSO_TCPV6; 862 } else { 863 if (qos) { 864 u8 *qc; 865 866 if (ipv4) 867 ip_send_check(ip_hdr(tmp)); 868 869 qc = ieee80211_get_qos_ctl((void *)tmp->data); 870 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 871 } 872 skb_shinfo(tmp)->gso_size = 0; 873 } 874 875 skb_mark_not_on_list(tmp); 876 __skb_queue_tail(mpdus_skb, tmp); 877 i++; 878 } 879 880 return 0; 881 } 882 883 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 884 struct ieee80211_tx_info *info, 885 struct ieee80211_sta *sta, 886 struct sk_buff_head *mpdus_skb) 887 { 888 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 889 struct ieee80211_hdr *hdr = (void *)skb->data; 890 unsigned int mss = skb_shinfo(skb)->gso_size; 891 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 892 u16 snap_ip_tcp, pad; 893 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 894 u8 tid; 895 896 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 897 tcp_hdrlen(skb); 898 899 if (!mvmsta->max_amsdu_len || 900 !ieee80211_is_data_qos(hdr->frame_control) || 901 !mvmsta->amsdu_enabled) 902 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 903 904 /* 905 * Do not build AMSDU for IPv6 with extension headers. 906 * ask stack to segment and checkum the generated MPDUs for us. 907 */ 908 if (skb->protocol == htons(ETH_P_IPV6) && 909 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 910 IPPROTO_TCP) { 911 netdev_flags &= ~NETIF_F_CSUM_MASK; 912 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 913 } 914 915 tid = ieee80211_get_tid(hdr); 916 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 917 return -EINVAL; 918 919 /* 920 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 921 * during an BA session. 922 */ 923 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 924 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 925 !(mvmsta->amsdu_enabled & BIT(tid))) 926 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 927 928 /* 929 * Take the min of ieee80211 station and mvm station 930 */ 931 max_amsdu_len = 932 min_t(unsigned int, sta->cur->max_amsdu_len, 933 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 934 935 /* 936 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 937 * supported. This is a spec requirement (IEEE 802.11-2015 938 * section 8.7.3 NOTE 3). 939 */ 940 if (info->flags & IEEE80211_TX_CTL_AMPDU && 941 !sta->deflink.vht_cap.vht_supported) 942 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 943 944 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 945 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 946 pad = (4 - subf_len) & 0x3; 947 948 /* 949 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 950 * N * subf_len + (N - 1) * pad. 951 */ 952 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 953 954 if (sta->max_amsdu_subframes && 955 num_subframes > sta->max_amsdu_subframes) 956 num_subframes = sta->max_amsdu_subframes; 957 958 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 959 tcp_hdrlen(skb) + skb->data_len; 960 961 /* 962 * Make sure we have enough TBs for the A-MSDU: 963 * 2 for each subframe 964 * 1 more for each fragment 965 * 1 more for the potential data in the header 966 */ 967 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 968 mvm->trans->max_skb_frags) 969 num_subframes = 1; 970 971 if (num_subframes > 1) 972 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 973 974 /* This skb fits in one single A-MSDU */ 975 if (num_subframes * mss >= tcp_payload_len) { 976 __skb_queue_tail(mpdus_skb, skb); 977 return 0; 978 } 979 980 /* 981 * Trick the segmentation function to make it 982 * create SKBs that can fit into one A-MSDU. 983 */ 984 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 985 mpdus_skb); 986 } 987 #else /* CONFIG_INET */ 988 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 989 struct ieee80211_tx_info *info, 990 struct ieee80211_sta *sta, 991 struct sk_buff_head *mpdus_skb) 992 { 993 /* Impossible to get TSO with CONFIG_INET */ 994 WARN_ON(1); 995 996 return -1; 997 } 998 #endif 999 1000 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1001 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1002 { 1003 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1004 unsigned long now = jiffies; 1005 int tid; 1006 1007 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1008 return false; 1009 1010 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1011 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1012 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1013 return true; 1014 } 1015 1016 return false; 1017 } 1018 1019 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1020 struct iwl_mvm_sta *mvmsta, 1021 int airtime) 1022 { 1023 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1024 struct iwl_mvm_tcm_mac *mdata; 1025 1026 if (mac >= NUM_MAC_INDEX_DRIVER) 1027 return; 1028 1029 mdata = &mvm->tcm.data[mac]; 1030 1031 if (mvm->tcm.paused) 1032 return; 1033 1034 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1035 schedule_delayed_work(&mvm->tcm.work, 0); 1036 1037 mdata->tx.airtime += airtime; 1038 } 1039 1040 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1041 struct iwl_mvm_sta *mvmsta, int tid) 1042 { 1043 u32 ac = tid_to_mac80211_ac[tid]; 1044 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1045 struct iwl_mvm_tcm_mac *mdata; 1046 1047 if (mac >= NUM_MAC_INDEX_DRIVER) 1048 return -EINVAL; 1049 1050 mdata = &mvm->tcm.data[mac]; 1051 1052 mdata->tx.pkts[ac]++; 1053 1054 return 0; 1055 } 1056 1057 /* 1058 * Sets the fields in the Tx cmd that are crypto related. 1059 * 1060 * This function must be called with BHs disabled. 1061 */ 1062 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1063 struct ieee80211_tx_info *info, 1064 struct ieee80211_sta *sta) 1065 { 1066 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1067 struct iwl_mvm_sta *mvmsta; 1068 struct iwl_device_tx_cmd *dev_cmd; 1069 __le16 fc; 1070 u16 seq_number = 0; 1071 u8 tid = IWL_MAX_TID_COUNT; 1072 u16 txq_id; 1073 bool is_ampdu = false; 1074 int hdrlen; 1075 1076 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1077 fc = hdr->frame_control; 1078 hdrlen = ieee80211_hdrlen(fc); 1079 1080 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1081 return -1; 1082 1083 if (WARN_ON_ONCE(!mvmsta)) 1084 return -1; 1085 1086 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1087 return -1; 1088 1089 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he) 1090 return -1; 1091 1092 if (unlikely(ieee80211_is_probe_resp(fc))) 1093 iwl_mvm_probe_resp_set_noa(mvm, skb); 1094 1095 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1096 sta, mvmsta->sta_id); 1097 if (!dev_cmd) 1098 goto drop; 1099 1100 /* 1101 * we handle that entirely ourselves -- for uAPSD the firmware 1102 * will always send a notification, and for PS-Poll responses 1103 * we'll notify mac80211 when getting frame status 1104 */ 1105 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1106 1107 spin_lock(&mvmsta->lock); 1108 1109 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1110 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 1111 * assignment of MGMT TID 1112 */ 1113 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1114 tid = ieee80211_get_tid(hdr); 1115 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1116 goto drop_unlock_sta; 1117 1118 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1119 if (WARN_ONCE(is_ampdu && 1120 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1121 "Invalid internal agg state %d for TID %d", 1122 mvmsta->tid_data[tid].state, tid)) 1123 goto drop_unlock_sta; 1124 1125 seq_number = mvmsta->tid_data[tid].seq_number; 1126 seq_number &= IEEE80211_SCTL_SEQ; 1127 1128 if (!iwl_mvm_has_new_tx_api(mvm)) { 1129 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1130 1131 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1132 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1133 /* update the tx_cmd hdr as it was already copied */ 1134 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1135 } 1136 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) { 1137 tid = IWL_TID_NON_QOS; 1138 } 1139 1140 txq_id = mvmsta->tid_data[tid].txq_id; 1141 1142 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1143 1144 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1145 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1146 spin_unlock(&mvmsta->lock); 1147 return -1; 1148 } 1149 1150 if (!iwl_mvm_has_new_tx_api(mvm)) { 1151 /* Keep track of the time of the last frame for this RA/TID */ 1152 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1153 1154 /* 1155 * If we have timed-out TIDs - schedule the worker that will 1156 * reconfig the queues and update them 1157 * 1158 * Note that the no lock is taken here in order to not serialize 1159 * the TX flow. This isn't dangerous because scheduling 1160 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1161 * schedule it due to some race condition then next TX we get 1162 * here we will. 1163 */ 1164 if (unlikely(mvm->queue_info[txq_id].status == 1165 IWL_MVM_QUEUE_SHARED && 1166 iwl_mvm_txq_should_update(mvm, txq_id))) 1167 schedule_work(&mvm->add_stream_wk); 1168 } 1169 1170 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1171 mvmsta->sta_id, tid, txq_id, 1172 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1173 1174 /* From now on, we cannot access info->control */ 1175 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1176 1177 /* 1178 * The IV is introduced by the HW for new tx api, and it is not present 1179 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the 1180 * IV for those devices. 1181 */ 1182 if (ieee80211_is_data(fc)) 1183 iwl_mvm_mei_tx_copy_to_csme(mvm, skb, 1184 info->control.hw_key && 1185 !iwl_mvm_has_new_tx_api(mvm) ? 1186 info->control.hw_key->iv_len : 0); 1187 1188 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1189 goto drop_unlock_sta; 1190 1191 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1192 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1193 1194 spin_unlock(&mvmsta->lock); 1195 1196 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1197 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1198 goto drop; 1199 1200 return 0; 1201 1202 drop_unlock_sta: 1203 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1204 spin_unlock(&mvmsta->lock); 1205 drop: 1206 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid); 1207 return -1; 1208 } 1209 1210 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1211 struct ieee80211_sta *sta) 1212 { 1213 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1214 struct ieee80211_tx_info info; 1215 struct sk_buff_head mpdus_skbs; 1216 unsigned int payload_len; 1217 int ret; 1218 struct sk_buff *orig_skb = skb; 1219 1220 if (WARN_ON_ONCE(!mvmsta)) 1221 return -1; 1222 1223 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1224 return -1; 1225 1226 memcpy(&info, skb->cb, sizeof(info)); 1227 1228 if (!skb_is_gso(skb)) 1229 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1230 1231 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1232 tcp_hdrlen(skb) + skb->data_len; 1233 1234 if (payload_len <= skb_shinfo(skb)->gso_size) 1235 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1236 1237 __skb_queue_head_init(&mpdus_skbs); 1238 1239 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1240 if (ret) 1241 return ret; 1242 1243 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1244 return ret; 1245 1246 while (!skb_queue_empty(&mpdus_skbs)) { 1247 skb = __skb_dequeue(&mpdus_skbs); 1248 1249 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1250 if (ret) { 1251 /* Free skbs created as part of TSO logic that have not yet been dequeued */ 1252 __skb_queue_purge(&mpdus_skbs); 1253 /* skb here is not necessarily same as skb that entered this method, 1254 * so free it explicitly. 1255 */ 1256 if (skb == orig_skb) 1257 ieee80211_free_txskb(mvm->hw, skb); 1258 else 1259 kfree_skb(skb); 1260 /* there was error, but we consumed skb one way or another, so return 0 */ 1261 return 0; 1262 } 1263 } 1264 1265 return 0; 1266 } 1267 1268 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1269 struct ieee80211_sta *sta, u8 tid) 1270 { 1271 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1272 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1273 struct ieee80211_vif *vif = mvmsta->vif; 1274 u16 normalized_ssn; 1275 1276 lockdep_assert_held(&mvmsta->lock); 1277 1278 if ((tid_data->state == IWL_AGG_ON || 1279 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1280 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1281 /* 1282 * Now that this aggregation or DQA queue is empty tell 1283 * mac80211 so it knows we no longer have frames buffered for 1284 * the station on this TID (for the TIM bitmap calculation.) 1285 */ 1286 ieee80211_sta_set_buffered(sta, tid, false); 1287 } 1288 1289 /* 1290 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1291 * to align the wrap around of ssn so we compare relevant values. 1292 */ 1293 normalized_ssn = tid_data->ssn; 1294 if (mvm->trans->trans_cfg->gen2) 1295 normalized_ssn &= 0xff; 1296 1297 if (normalized_ssn != tid_data->next_reclaimed) 1298 return; 1299 1300 switch (tid_data->state) { 1301 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1302 IWL_DEBUG_TX_QUEUES(mvm, 1303 "Can continue addBA flow ssn = next_recl = %d\n", 1304 tid_data->next_reclaimed); 1305 tid_data->state = IWL_AGG_STARTING; 1306 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1307 break; 1308 1309 case IWL_EMPTYING_HW_QUEUE_DELBA: 1310 IWL_DEBUG_TX_QUEUES(mvm, 1311 "Can continue DELBA flow ssn = next_recl = %d\n", 1312 tid_data->next_reclaimed); 1313 tid_data->state = IWL_AGG_OFF; 1314 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1315 break; 1316 1317 default: 1318 break; 1319 } 1320 } 1321 1322 #ifdef CONFIG_IWLWIFI_DEBUG 1323 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1324 { 1325 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1326 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1327 1328 switch (status & TX_STATUS_MSK) { 1329 case TX_STATUS_SUCCESS: 1330 return "SUCCESS"; 1331 TX_STATUS_POSTPONE(DELAY); 1332 TX_STATUS_POSTPONE(FEW_BYTES); 1333 TX_STATUS_POSTPONE(BT_PRIO); 1334 TX_STATUS_POSTPONE(QUIET_PERIOD); 1335 TX_STATUS_POSTPONE(CALC_TTAK); 1336 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1337 TX_STATUS_FAIL(SHORT_LIMIT); 1338 TX_STATUS_FAIL(LONG_LIMIT); 1339 TX_STATUS_FAIL(UNDERRUN); 1340 TX_STATUS_FAIL(DRAIN_FLOW); 1341 TX_STATUS_FAIL(RFKILL_FLUSH); 1342 TX_STATUS_FAIL(LIFE_EXPIRE); 1343 TX_STATUS_FAIL(DEST_PS); 1344 TX_STATUS_FAIL(HOST_ABORTED); 1345 TX_STATUS_FAIL(BT_RETRY); 1346 TX_STATUS_FAIL(STA_INVALID); 1347 TX_STATUS_FAIL(FRAG_DROPPED); 1348 TX_STATUS_FAIL(TID_DISABLE); 1349 TX_STATUS_FAIL(FIFO_FLUSHED); 1350 TX_STATUS_FAIL(SMALL_CF_POLL); 1351 TX_STATUS_FAIL(FW_DROP); 1352 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1353 } 1354 1355 return "UNKNOWN"; 1356 1357 #undef TX_STATUS_FAIL 1358 #undef TX_STATUS_POSTPONE 1359 } 1360 #endif /* CONFIG_IWLWIFI_DEBUG */ 1361 1362 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1363 { 1364 switch (chan_width) { 1365 case RATE_MCS_CHAN_WIDTH_20: 1366 return 0; 1367 case RATE_MCS_CHAN_WIDTH_40: 1368 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1369 case RATE_MCS_CHAN_WIDTH_80: 1370 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1371 case RATE_MCS_CHAN_WIDTH_160: 1372 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1373 default: 1374 return 0; 1375 } 1376 } 1377 1378 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1379 enum nl80211_band band, 1380 struct ieee80211_tx_rate *r) 1381 { 1382 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1383 u32 rate = format == RATE_MCS_HT_MSK ? 1384 RATE_HT_MCS_INDEX(rate_n_flags) : 1385 rate_n_flags & RATE_MCS_CODE_MSK; 1386 1387 r->flags |= 1388 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1389 RATE_MCS_CHAN_WIDTH_MSK); 1390 1391 if (rate_n_flags & RATE_MCS_SGI_MSK) 1392 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1393 if (format == RATE_MCS_HT_MSK) { 1394 r->flags |= IEEE80211_TX_RC_MCS; 1395 r->idx = rate; 1396 } else if (format == RATE_MCS_VHT_MSK) { 1397 ieee80211_rate_set_vht(r, rate, 1398 ((rate_n_flags & RATE_MCS_NSS_MSK) >> 1399 RATE_MCS_NSS_POS) + 1); 1400 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1401 } else if (format == RATE_MCS_HE_MSK) { 1402 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1403 * but it only matters for radiotap */ 1404 r->idx = 0; 1405 } else { 1406 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1407 band); 1408 } 1409 } 1410 1411 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags, 1412 enum nl80211_band band, 1413 struct ieee80211_tx_rate *r) 1414 { 1415 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1416 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1417 1418 r->flags |= 1419 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1420 RATE_MCS_CHAN_WIDTH_MSK_V1); 1421 1422 if (rate_n_flags & RATE_MCS_SGI_MSK_V1) 1423 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1424 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 1425 r->flags |= IEEE80211_TX_RC_MCS; 1426 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 1427 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 1428 ieee80211_rate_set_vht( 1429 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1430 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1431 RATE_VHT_MCS_NSS_POS) + 1); 1432 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1433 } else { 1434 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1435 band); 1436 } 1437 } 1438 1439 /* 1440 * translate ucode response to mac80211 tx status control values 1441 */ 1442 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw, 1443 u32 rate_n_flags, 1444 struct ieee80211_tx_info *info) 1445 { 1446 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1447 1448 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP, 1449 TX_CMD, 0) <= 6) 1450 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1451 1452 info->status.antenna = 1453 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1454 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, 1455 info->band, r); 1456 } 1457 1458 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1459 u32 status, __le16 frame_control) 1460 { 1461 struct iwl_fw_dbg_trigger_tlv *trig; 1462 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1463 int i; 1464 1465 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1466 enum iwl_fw_ini_time_point tp = 1467 IWL_FW_INI_TIME_POINT_TX_FAILED; 1468 1469 if (ieee80211_is_action(frame_control)) 1470 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1471 1472 iwl_dbg_tlv_time_point(&mvm->fwrt, 1473 tp, NULL); 1474 return; 1475 } 1476 1477 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1478 FW_DBG_TRIGGER_TX_STATUS); 1479 if (!trig) 1480 return; 1481 1482 status_trig = (void *)trig->data; 1483 1484 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1485 /* don't collect on status 0 */ 1486 if (!status_trig->statuses[i].status) 1487 break; 1488 1489 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1490 continue; 1491 1492 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1493 "Tx status %d was received", 1494 status & TX_STATUS_MSK); 1495 break; 1496 } 1497 } 1498 1499 /* 1500 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1501 * @tx_resp: the Tx response from the fw (agg or non-agg) 1502 * 1503 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1504 * it can't know that everything will go well until the end of the AMPDU, it 1505 * can't know in advance the number of MPDUs that will be sent in the current 1506 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1507 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1508 * of the batch. This is why the SSN of the SCD is written at the end of the 1509 * whole struct at a variable offset. This function knows how to cope with the 1510 * variable offset and returns the SSN of the SCD. 1511 */ 1512 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1513 struct iwl_mvm_tx_resp *tx_resp) 1514 { 1515 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1516 tx_resp->frame_count) & 0xfff; 1517 } 1518 1519 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1520 struct iwl_rx_packet *pkt) 1521 { 1522 struct ieee80211_sta *sta; 1523 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1524 int txq_id = SEQ_TO_QUEUE(sequence); 1525 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1526 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1527 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1528 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1529 struct agg_tx_status *agg_status = 1530 iwl_mvm_get_agg_status(mvm, tx_resp); 1531 u32 status = le16_to_cpu(agg_status->status); 1532 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1533 struct sk_buff_head skbs; 1534 u8 skb_freed = 0; 1535 u8 lq_color; 1536 u16 next_reclaimed, seq_ctl; 1537 bool is_ndp = false; 1538 1539 __skb_queue_head_init(&skbs); 1540 1541 if (iwl_mvm_has_new_tx_api(mvm)) 1542 txq_id = le16_to_cpu(tx_resp->tx_queue); 1543 1544 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1545 1546 /* we can free until ssn % q.n_bd not inclusive */ 1547 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1548 1549 while (!skb_queue_empty(&skbs)) { 1550 struct sk_buff *skb = __skb_dequeue(&skbs); 1551 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1552 struct ieee80211_hdr *hdr = (void *)skb->data; 1553 bool flushed = false; 1554 1555 skb_freed++; 1556 1557 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1558 1559 memset(&info->status, 0, sizeof(info->status)); 1560 1561 /* inform mac80211 about what happened with the frame */ 1562 switch (status & TX_STATUS_MSK) { 1563 case TX_STATUS_SUCCESS: 1564 case TX_STATUS_DIRECT_DONE: 1565 info->flags |= IEEE80211_TX_STAT_ACK; 1566 break; 1567 case TX_STATUS_FAIL_FIFO_FLUSHED: 1568 case TX_STATUS_FAIL_DRAIN_FLOW: 1569 flushed = true; 1570 break; 1571 case TX_STATUS_FAIL_DEST_PS: 1572 /* the FW should have stopped the queue and not 1573 * return this status 1574 */ 1575 IWL_ERR_LIMIT(mvm, 1576 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1577 status, le16_to_cpu(hdr->frame_control)); 1578 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1579 break; 1580 default: 1581 break; 1582 } 1583 1584 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1585 ieee80211_is_mgmt(hdr->frame_control)) 1586 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1587 1588 /* 1589 * If we are freeing multiple frames, mark all the frames 1590 * but the first one as acked, since they were acknowledged 1591 * before 1592 * */ 1593 if (skb_freed > 1) 1594 info->flags |= IEEE80211_TX_STAT_ACK; 1595 1596 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1597 1598 info->status.rates[0].count = tx_resp->failure_frame + 1; 1599 1600 iwl_mvm_hwrate_to_tx_status(mvm->fw, 1601 le32_to_cpu(tx_resp->initial_rate), 1602 info); 1603 1604 /* Don't assign the converted initial_rate, because driver 1605 * TLC uses this and doesn't support the new FW rate 1606 */ 1607 info->status.status_driver_data[1] = 1608 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1609 1610 /* Single frame failure in an AMPDU queue => send BAR */ 1611 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1612 !(info->flags & IEEE80211_TX_STAT_ACK) && 1613 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1614 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1615 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1616 1617 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1618 if (ieee80211_is_back_req(hdr->frame_control)) 1619 seq_ctl = 0; 1620 else if (status != TX_STATUS_SUCCESS) 1621 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1622 1623 if (unlikely(!seq_ctl)) { 1624 /* 1625 * If it is an NDP, we can't update next_reclaim since 1626 * its sequence control is 0. Note that for that same 1627 * reason, NDPs are never sent to A-MPDU'able queues 1628 * so that we can never have more than one freed frame 1629 * for a single Tx resonse (see WARN_ON below). 1630 */ 1631 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1632 is_ndp = true; 1633 } 1634 1635 /* 1636 * TODO: this is not accurate if we are freeing more than one 1637 * packet. 1638 */ 1639 info->status.tx_time = 1640 le16_to_cpu(tx_resp->wireless_media_time); 1641 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1642 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1643 info->status.status_driver_data[0] = 1644 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1645 1646 ieee80211_tx_status(mvm->hw, skb); 1647 } 1648 1649 /* This is an aggregation queue or might become one, so we use 1650 * the ssn since: ssn = wifi seq_num % 256. 1651 * The seq_ctl is the sequence control of the packet to which 1652 * this Tx response relates. But if there is a hole in the 1653 * bitmap of the BA we received, this Tx response may allow to 1654 * reclaim the hole and all the subsequent packets that were 1655 * already acked. In that case, seq_ctl != ssn, and the next 1656 * packet to be reclaimed will be ssn and not seq_ctl. In that 1657 * case, several packets will be reclaimed even if 1658 * frame_count = 1. 1659 * 1660 * The ssn is the index (% 256) of the latest packet that has 1661 * treated (acked / dropped) + 1. 1662 */ 1663 next_reclaimed = ssn; 1664 1665 IWL_DEBUG_TX_REPLY(mvm, 1666 "TXQ %d status %s (0x%08x)\n", 1667 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1668 1669 IWL_DEBUG_TX_REPLY(mvm, 1670 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1671 le32_to_cpu(tx_resp->initial_rate), 1672 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1673 ssn, next_reclaimed, seq_ctl); 1674 1675 rcu_read_lock(); 1676 1677 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1678 /* 1679 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1680 * the firmware while we still have packets for it in the Tx queues. 1681 */ 1682 if (WARN_ON_ONCE(!sta)) 1683 goto out; 1684 1685 if (!IS_ERR(sta)) { 1686 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1687 1688 iwl_mvm_tx_airtime(mvm, mvmsta, 1689 le16_to_cpu(tx_resp->wireless_media_time)); 1690 1691 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1692 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1693 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1694 1695 if (sta->wme && tid != IWL_MGMT_TID) { 1696 struct iwl_mvm_tid_data *tid_data = 1697 &mvmsta->tid_data[tid]; 1698 bool send_eosp_ndp = false; 1699 1700 spin_lock_bh(&mvmsta->lock); 1701 1702 if (!is_ndp) { 1703 tid_data->next_reclaimed = next_reclaimed; 1704 IWL_DEBUG_TX_REPLY(mvm, 1705 "Next reclaimed packet:%d\n", 1706 next_reclaimed); 1707 } else { 1708 IWL_DEBUG_TX_REPLY(mvm, 1709 "NDP - don't update next_reclaimed\n"); 1710 } 1711 1712 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1713 1714 if (mvmsta->sleep_tx_count) { 1715 mvmsta->sleep_tx_count--; 1716 if (mvmsta->sleep_tx_count && 1717 !iwl_mvm_tid_queued(mvm, tid_data)) { 1718 /* 1719 * The number of frames in the queue 1720 * dropped to 0 even if we sent less 1721 * frames than we thought we had on the 1722 * Tx queue. 1723 * This means we had holes in the BA 1724 * window that we just filled, ask 1725 * mac80211 to send EOSP since the 1726 * firmware won't know how to do that. 1727 * Send NDP and the firmware will send 1728 * EOSP notification that will trigger 1729 * a call to ieee80211_sta_eosp(). 1730 */ 1731 send_eosp_ndp = true; 1732 } 1733 } 1734 1735 spin_unlock_bh(&mvmsta->lock); 1736 if (send_eosp_ndp) { 1737 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1738 IEEE80211_FRAME_RELEASE_UAPSD, 1739 1, tid, false, false); 1740 mvmsta->sleep_tx_count = 0; 1741 ieee80211_send_eosp_nullfunc(sta, tid); 1742 } 1743 } 1744 1745 if (mvmsta->next_status_eosp) { 1746 mvmsta->next_status_eosp = false; 1747 ieee80211_sta_eosp(sta); 1748 } 1749 } 1750 out: 1751 rcu_read_unlock(); 1752 } 1753 1754 #ifdef CONFIG_IWLWIFI_DEBUG 1755 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1756 static const char *iwl_get_agg_tx_status(u16 status) 1757 { 1758 switch (status & AGG_TX_STATE_STATUS_MSK) { 1759 AGG_TX_STATE_(TRANSMITTED); 1760 AGG_TX_STATE_(UNDERRUN); 1761 AGG_TX_STATE_(BT_PRIO); 1762 AGG_TX_STATE_(FEW_BYTES); 1763 AGG_TX_STATE_(ABORT); 1764 AGG_TX_STATE_(TX_ON_AIR_DROP); 1765 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1766 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1767 AGG_TX_STATE_(SCD_QUERY); 1768 AGG_TX_STATE_(TEST_BAD_CRC32); 1769 AGG_TX_STATE_(RESPONSE); 1770 AGG_TX_STATE_(DUMP_TX); 1771 AGG_TX_STATE_(DELAY_TX); 1772 } 1773 1774 return "UNKNOWN"; 1775 } 1776 1777 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1778 struct iwl_rx_packet *pkt) 1779 { 1780 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1781 struct agg_tx_status *frame_status = 1782 iwl_mvm_get_agg_status(mvm, tx_resp); 1783 int i; 1784 bool tirgger_timepoint = false; 1785 1786 for (i = 0; i < tx_resp->frame_count; i++) { 1787 u16 fstatus = le16_to_cpu(frame_status[i].status); 1788 /* In case one frame wasn't transmitted trigger time point */ 1789 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1790 AGG_TX_STATE_TRANSMITTED); 1791 IWL_DEBUG_TX_REPLY(mvm, 1792 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1793 iwl_get_agg_tx_status(fstatus), 1794 fstatus & AGG_TX_STATE_STATUS_MSK, 1795 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1796 AGG_TX_STATE_TRY_CNT_POS, 1797 le16_to_cpu(frame_status[i].sequence)); 1798 } 1799 1800 if (tirgger_timepoint) 1801 iwl_dbg_tlv_time_point(&mvm->fwrt, 1802 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1803 1804 } 1805 #else 1806 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1807 struct iwl_rx_packet *pkt) 1808 {} 1809 #endif /* CONFIG_IWLWIFI_DEBUG */ 1810 1811 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1812 struct iwl_rx_packet *pkt) 1813 { 1814 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1815 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1816 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1817 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1818 struct iwl_mvm_sta *mvmsta; 1819 int queue = SEQ_TO_QUEUE(sequence); 1820 struct ieee80211_sta *sta; 1821 1822 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1823 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1824 return; 1825 1826 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1827 1828 rcu_read_lock(); 1829 1830 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1831 1832 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1833 if (WARN_ON_ONCE(!sta || !sta->wme)) { 1834 rcu_read_unlock(); 1835 return; 1836 } 1837 1838 if (!WARN_ON_ONCE(!mvmsta)) { 1839 mvmsta->tid_data[tid].rate_n_flags = 1840 le32_to_cpu(tx_resp->initial_rate); 1841 mvmsta->tid_data[tid].tx_time = 1842 le16_to_cpu(tx_resp->wireless_media_time); 1843 mvmsta->tid_data[tid].lq_color = 1844 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1845 iwl_mvm_tx_airtime(mvm, mvmsta, 1846 le16_to_cpu(tx_resp->wireless_media_time)); 1847 } 1848 1849 rcu_read_unlock(); 1850 } 1851 1852 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1853 { 1854 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1855 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1856 1857 if (tx_resp->frame_count == 1) 1858 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1859 else 1860 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1861 } 1862 1863 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1864 int txq, int index, 1865 struct ieee80211_tx_info *tx_info, u32 rate, 1866 bool is_flush) 1867 { 1868 struct sk_buff_head reclaimed_skbs; 1869 struct iwl_mvm_tid_data *tid_data = NULL; 1870 struct ieee80211_sta *sta; 1871 struct iwl_mvm_sta *mvmsta = NULL; 1872 struct sk_buff *skb; 1873 int freed; 1874 1875 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1876 tid > IWL_MAX_TID_COUNT, 1877 "sta_id %d tid %d", sta_id, tid)) 1878 return; 1879 1880 rcu_read_lock(); 1881 1882 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1883 1884 /* Reclaiming frames for a station that has been deleted ? */ 1885 if (WARN_ON_ONCE(!sta)) { 1886 rcu_read_unlock(); 1887 return; 1888 } 1889 1890 __skb_queue_head_init(&reclaimed_skbs); 1891 1892 /* 1893 * Release all TFDs before the SSN, i.e. all TFDs in front of 1894 * block-ack window (we assume that they've been successfully 1895 * transmitted ... if not, it's too late anyway). 1896 */ 1897 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1898 1899 skb_queue_walk(&reclaimed_skbs, skb) { 1900 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1901 1902 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1903 1904 memset(&info->status, 0, sizeof(info->status)); 1905 /* Packet was transmitted successfully, failures come as single 1906 * frames because before failing a frame the firmware transmits 1907 * it without aggregation at least once. 1908 */ 1909 if (!is_flush) 1910 info->flags |= IEEE80211_TX_STAT_ACK; 1911 } 1912 1913 /* 1914 * It's possible to get a BA response after invalidating the rcu (rcu is 1915 * invalidated in order to prevent new Tx from being sent, but there may 1916 * be some frames already in-flight). 1917 * In this case we just want to reclaim, and could skip all the 1918 * sta-dependent stuff since it's in the middle of being removed 1919 * anyways. 1920 */ 1921 if (IS_ERR(sta)) 1922 goto out; 1923 1924 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1925 tid_data = &mvmsta->tid_data[tid]; 1926 1927 if (tid_data->txq_id != txq) { 1928 IWL_ERR(mvm, 1929 "invalid reclaim request: Q %d, tid %d\n", 1930 tid_data->txq_id, tid); 1931 rcu_read_unlock(); 1932 return; 1933 } 1934 1935 spin_lock_bh(&mvmsta->lock); 1936 1937 tid_data->next_reclaimed = index; 1938 1939 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1940 1941 freed = 0; 1942 1943 /* pack lq color from tid_data along the reduced txp */ 1944 tx_info->status.status_driver_data[0] = 1945 RS_DRV_DATA_PACK(tid_data->lq_color, 1946 tx_info->status.status_driver_data[0]); 1947 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1948 1949 skb_queue_walk(&reclaimed_skbs, skb) { 1950 struct ieee80211_hdr *hdr = (void *)skb->data; 1951 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1952 1953 if (!is_flush) { 1954 if (ieee80211_is_data_qos(hdr->frame_control)) 1955 freed++; 1956 else 1957 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1958 } 1959 1960 /* this is the first skb we deliver in this batch */ 1961 /* put the rate scaling data there */ 1962 if (freed == 1) { 1963 info->flags |= IEEE80211_TX_STAT_AMPDU; 1964 memcpy(&info->status, &tx_info->status, 1965 sizeof(tx_info->status)); 1966 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info); 1967 } 1968 } 1969 1970 spin_unlock_bh(&mvmsta->lock); 1971 1972 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1973 * possible (i.e. first MPDU in the aggregation wasn't acked) 1974 * Still it's important to update RS about sent vs. acked. 1975 */ 1976 if (!is_flush && skb_queue_empty(&reclaimed_skbs)) { 1977 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1978 1979 if (mvmsta->vif) 1980 chanctx_conf = 1981 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf); 1982 1983 if (WARN_ON_ONCE(!chanctx_conf)) 1984 goto out; 1985 1986 tx_info->band = chanctx_conf->def.chan->band; 1987 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info); 1988 1989 if (!iwl_mvm_has_tlc_offload(mvm)) { 1990 IWL_DEBUG_TX_REPLY(mvm, 1991 "No reclaim. Update rs directly\n"); 1992 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 1993 } 1994 } 1995 1996 out: 1997 rcu_read_unlock(); 1998 1999 while (!skb_queue_empty(&reclaimed_skbs)) { 2000 skb = __skb_dequeue(&reclaimed_skbs); 2001 ieee80211_tx_status(mvm->hw, skb); 2002 } 2003 } 2004 2005 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2006 { 2007 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2008 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 2009 int sta_id, tid, txq, index; 2010 struct ieee80211_tx_info ba_info = {}; 2011 struct iwl_mvm_ba_notif *ba_notif; 2012 struct iwl_mvm_tid_data *tid_data; 2013 struct iwl_mvm_sta *mvmsta; 2014 2015 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 2016 2017 if (iwl_mvm_has_new_tx_api(mvm)) { 2018 struct iwl_mvm_compressed_ba_notif *ba_res = 2019 (void *)pkt->data; 2020 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 2021 u16 tfd_cnt; 2022 int i; 2023 2024 if (unlikely(sizeof(*ba_res) > pkt_len)) 2025 return; 2026 2027 sta_id = ba_res->sta_id; 2028 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 2029 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 2030 ba_info.status.tx_time = 2031 (u16)le32_to_cpu(ba_res->wireless_time); 2032 ba_info.status.status_driver_data[0] = 2033 (void *)(uintptr_t)ba_res->reduced_txp; 2034 2035 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 2036 if (!tfd_cnt || struct_size(ba_res, tfd, tfd_cnt) > pkt_len) 2037 return; 2038 2039 rcu_read_lock(); 2040 2041 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2042 /* 2043 * It's possible to get a BA response after invalidating the rcu 2044 * (rcu is invalidated in order to prevent new Tx from being 2045 * sent, but there may be some frames already in-flight). 2046 * In this case we just want to reclaim, and could skip all the 2047 * sta-dependent stuff since it's in the middle of being removed 2048 * anyways. 2049 */ 2050 2051 /* Free per TID */ 2052 for (i = 0; i < tfd_cnt; i++) { 2053 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 2054 &ba_res->tfd[i]; 2055 2056 tid = ba_tfd->tid; 2057 if (tid == IWL_MGMT_TID) 2058 tid = IWL_MAX_TID_COUNT; 2059 2060 if (mvmsta) 2061 mvmsta->tid_data[i].lq_color = lq_color; 2062 2063 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 2064 (int)(le16_to_cpu(ba_tfd->q_num)), 2065 le16_to_cpu(ba_tfd->tfd_index), 2066 &ba_info, 2067 le32_to_cpu(ba_res->tx_rate), false); 2068 } 2069 2070 if (mvmsta) 2071 iwl_mvm_tx_airtime(mvm, mvmsta, 2072 le32_to_cpu(ba_res->wireless_time)); 2073 rcu_read_unlock(); 2074 2075 IWL_DEBUG_TX_REPLY(mvm, 2076 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2077 sta_id, le32_to_cpu(ba_res->flags), 2078 le16_to_cpu(ba_res->txed), 2079 le16_to_cpu(ba_res->done)); 2080 return; 2081 } 2082 2083 ba_notif = (void *)pkt->data; 2084 sta_id = ba_notif->sta_id; 2085 tid = ba_notif->tid; 2086 /* "flow" corresponds to Tx queue */ 2087 txq = le16_to_cpu(ba_notif->scd_flow); 2088 /* "ssn" is start of block-ack Tx window, corresponds to index 2089 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2090 index = le16_to_cpu(ba_notif->scd_ssn); 2091 2092 rcu_read_lock(); 2093 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2094 if (WARN_ON_ONCE(!mvmsta)) { 2095 rcu_read_unlock(); 2096 return; 2097 } 2098 2099 tid_data = &mvmsta->tid_data[tid]; 2100 2101 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2102 ba_info.status.ampdu_len = ba_notif->txed; 2103 ba_info.status.tx_time = tid_data->tx_time; 2104 ba_info.status.status_driver_data[0] = 2105 (void *)(uintptr_t)ba_notif->reduced_txp; 2106 2107 rcu_read_unlock(); 2108 2109 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2110 tid_data->rate_n_flags, false); 2111 2112 IWL_DEBUG_TX_REPLY(mvm, 2113 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2114 ba_notif->sta_addr, ba_notif->sta_id); 2115 2116 IWL_DEBUG_TX_REPLY(mvm, 2117 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2118 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2119 le64_to_cpu(ba_notif->bitmap), txq, index, 2120 ba_notif->txed, ba_notif->txed_2_done); 2121 2122 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2123 ba_notif->reduced_txp); 2124 } 2125 2126 /* 2127 * Note that there are transports that buffer frames before they reach 2128 * the firmware. This means that after flush_tx_path is called, the 2129 * queue might not be empty. The race-free way to handle this is to: 2130 * 1) set the station as draining 2131 * 2) flush the Tx path 2132 * 3) wait for the transport queues to be empty 2133 */ 2134 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2135 { 2136 int ret; 2137 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2138 .queues_ctl = cpu_to_le32(tfd_msk), 2139 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2140 }; 2141 2142 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2143 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2144 sizeof(flush_cmd), &flush_cmd); 2145 if (ret) 2146 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2147 return ret; 2148 } 2149 2150 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2151 { 2152 int ret; 2153 struct iwl_tx_path_flush_cmd_rsp *rsp; 2154 struct iwl_tx_path_flush_cmd flush_cmd = { 2155 .sta_id = cpu_to_le32(sta_id), 2156 .tid_mask = cpu_to_le16(tids), 2157 }; 2158 2159 struct iwl_host_cmd cmd = { 2160 .id = TXPATH_FLUSH, 2161 .len = { sizeof(flush_cmd), }, 2162 .data = { &flush_cmd, }, 2163 }; 2164 2165 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2166 2167 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2168 cmd.flags |= CMD_WANT_SKB; 2169 2170 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2171 sta_id, tids); 2172 2173 ret = iwl_mvm_send_cmd(mvm, &cmd); 2174 2175 if (ret) { 2176 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2177 return ret; 2178 } 2179 2180 if (cmd.flags & CMD_WANT_SKB) { 2181 int i; 2182 int num_flushed_queues; 2183 2184 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2185 ret = -EIO; 2186 goto free_rsp; 2187 } 2188 2189 rsp = (void *)cmd.resp_pkt->data; 2190 2191 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2192 "sta_id %d != rsp_sta_id %d", 2193 sta_id, le16_to_cpu(rsp->sta_id))) { 2194 ret = -EIO; 2195 goto free_rsp; 2196 } 2197 2198 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2199 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2200 "num_flushed_queues %d", num_flushed_queues)) { 2201 ret = -EIO; 2202 goto free_rsp; 2203 } 2204 2205 for (i = 0; i < num_flushed_queues; i++) { 2206 struct ieee80211_tx_info tx_info = {}; 2207 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2208 int tid = le16_to_cpu(queue_info->tid); 2209 int read_before = le16_to_cpu(queue_info->read_before_flush); 2210 int read_after = le16_to_cpu(queue_info->read_after_flush); 2211 int queue_num = le16_to_cpu(queue_info->queue_num); 2212 2213 if (tid == IWL_MGMT_TID) 2214 tid = IWL_MAX_TID_COUNT; 2215 2216 IWL_DEBUG_TX_QUEUES(mvm, 2217 "tid %d queue_id %d read-before %d read-after %d\n", 2218 tid, queue_num, read_before, read_after); 2219 2220 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2221 &tx_info, 0, true); 2222 } 2223 free_rsp: 2224 iwl_free_resp(&cmd); 2225 } 2226 return ret; 2227 } 2228 2229 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal) 2230 { 2231 struct iwl_mvm_int_sta *int_sta = sta; 2232 struct iwl_mvm_sta *mvm_sta = sta; 2233 2234 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != 2235 offsetof(struct iwl_mvm_sta, sta_id)); 2236 2237 if (iwl_mvm_has_new_tx_api(mvm)) 2238 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xffff); 2239 2240 if (internal) 2241 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk); 2242 2243 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk); 2244 } 2245