1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2025 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/gso.h> 11 #include <net/ip.h> 12 #include <net/ipv6.h> 13 14 #include "iwl-trans.h" 15 #include "iwl-nvm-utils.h" 16 #include "iwl-utils.h" 17 #include "mvm.h" 18 #include "sta.h" 19 #include "time-sync.h" 20 21 static void 22 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 23 u16 tid, u16 ssn) 24 { 25 struct iwl_fw_dbg_trigger_tlv *trig; 26 struct iwl_fw_dbg_trigger_ba *ba_trig; 27 28 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA); 29 if (!trig) 30 return; 31 32 ba_trig = (void *)trig->data; 33 34 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 35 return; 36 37 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 38 "BAR sent to %pM, tid %d, ssn %d", 39 addr, tid, ssn); 40 } 41 42 #define OPT_HDR(type, skb, off) \ 43 (type *)(skb_network_header(skb) + (off)) 44 45 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 46 struct ieee80211_tx_info *info, 47 bool amsdu) 48 { 49 struct ieee80211_hdr *hdr = (void *)skb->data; 50 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 51 u16 offload_assist = 0; 52 #if IS_ENABLED(CONFIG_INET) 53 u8 protocol = 0; 54 55 /* Do not compute checksum if already computed */ 56 if (skb->ip_summed != CHECKSUM_PARTIAL) 57 goto out; 58 59 /* We do not expect to be requested to csum stuff we do not support */ 60 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 61 (skb->protocol != htons(ETH_P_IP) && 62 skb->protocol != htons(ETH_P_IPV6)), 63 "No support for requested checksum\n")) { 64 skb_checksum_help(skb); 65 goto out; 66 } 67 68 if (skb->protocol == htons(ETH_P_IP)) { 69 protocol = ip_hdr(skb)->protocol; 70 } else { 71 #if IS_ENABLED(CONFIG_IPV6) 72 struct ipv6hdr *ipv6h = 73 (struct ipv6hdr *)skb_network_header(skb); 74 unsigned int off = sizeof(*ipv6h); 75 76 protocol = ipv6h->nexthdr; 77 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 78 struct ipv6_opt_hdr *hp; 79 80 /* only supported extension headers */ 81 if (protocol != NEXTHDR_ROUTING && 82 protocol != NEXTHDR_HOP && 83 protocol != NEXTHDR_DEST) { 84 skb_checksum_help(skb); 85 goto out; 86 } 87 88 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 89 protocol = hp->nexthdr; 90 off += ipv6_optlen(hp); 91 } 92 /* if we get here - protocol now should be TCP/UDP */ 93 #endif 94 } 95 96 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 97 WARN_ON_ONCE(1); 98 skb_checksum_help(skb); 99 goto out; 100 } 101 102 /* enable L4 csum */ 103 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 104 105 /* 106 * Set offset to IP header (snap). 107 * We don't support tunneling so no need to take care of inner header. 108 * Size is in words. 109 */ 110 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 111 112 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 113 if (skb->protocol == htons(ETH_P_IP) && amsdu) { 114 ip_hdr(skb)->check = 0; 115 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 116 } 117 118 /* reset UDP/TCP header csum */ 119 if (protocol == IPPROTO_TCP) 120 tcp_hdr(skb)->check = 0; 121 else 122 udp_hdr(skb)->check = 0; 123 124 out: 125 #endif 126 /* 127 * mac header len should include IV, size is in words unless 128 * the IV is added by the firmware like in WEP. 129 * In new Tx API, the IV is always added by the firmware. 130 */ 131 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 132 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 133 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 134 mh_len += info->control.hw_key->iv_len; 135 mh_len /= 2; 136 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 137 138 if (amsdu) 139 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 140 else if (ieee80211_hdrlen(hdr->frame_control) % 4) 141 /* padding is inserted later in transport */ 142 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 143 144 return offload_assist; 145 } 146 147 /* 148 * Sets most of the Tx cmd's fields 149 */ 150 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 151 struct iwl_tx_cmd_v6_params *tx_cmd_params, 152 struct ieee80211_tx_info *info, u8 sta_id) 153 { 154 struct ieee80211_hdr *hdr = (void *)skb->data; 155 __le16 fc = hdr->frame_control; 156 u32 tx_flags = le32_to_cpu(tx_cmd_params->tx_flags); 157 u32 len = skb->len + FCS_LEN; 158 bool amsdu = false; 159 u8 ac; 160 161 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) || 162 (ieee80211_is_probe_resp(fc) && 163 !is_multicast_ether_addr(hdr->addr1))) 164 tx_flags |= TX_CMD_FLG_ACK; 165 else 166 tx_flags &= ~TX_CMD_FLG_ACK; 167 168 if (ieee80211_is_probe_resp(fc)) 169 tx_flags |= TX_CMD_FLG_TSF; 170 171 if (ieee80211_has_morefrags(fc)) 172 tx_flags |= TX_CMD_FLG_MORE_FRAG; 173 174 if (ieee80211_is_data_qos(fc)) { 175 u8 *qc = ieee80211_get_qos_ctl(hdr); 176 tx_cmd_params->tid_tspec = qc[0] & 0xf; 177 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 178 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 179 } else if (ieee80211_is_back_req(fc)) { 180 struct ieee80211_bar *bar = (void *)skb->data; 181 u16 control = le16_to_cpu(bar->control); 182 u16 ssn = le16_to_cpu(bar->start_seq_num); 183 184 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 185 tx_cmd_params->tid_tspec = (control & 186 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 187 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 188 WARN_ON_ONCE(tx_cmd_params->tid_tspec >= IWL_MAX_TID_COUNT); 189 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd_params->tid_tspec, 190 ssn); 191 } else { 192 if (ieee80211_is_data(fc)) 193 tx_cmd_params->tid_tspec = IWL_TID_NON_QOS; 194 else 195 tx_cmd_params->tid_tspec = IWL_MAX_TID_COUNT; 196 197 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 198 tx_flags |= TX_CMD_FLG_SEQ_CTL; 199 else 200 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 201 } 202 203 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */ 204 if (tx_cmd_params->tid_tspec < IWL_MAX_TID_COUNT) 205 ac = tid_to_mac80211_ac[tx_cmd_params->tid_tspec]; 206 else 207 ac = tid_to_mac80211_ac[0]; 208 209 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 210 TX_CMD_FLG_BT_PRIO_POS; 211 212 if (ieee80211_is_mgmt(fc)) { 213 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 214 tx_cmd_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 215 else if (ieee80211_is_action(fc)) 216 tx_cmd_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 217 else 218 tx_cmd_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 219 220 /* The spec allows Action frames in A-MPDU, we don't support 221 * it 222 */ 223 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 224 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 225 tx_cmd_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 226 } else { 227 tx_cmd_params->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 228 } 229 230 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 231 !is_multicast_ether_addr(hdr->addr1)) 232 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 233 234 if (fw_has_capa(&mvm->fw->ucode_capa, 235 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 236 ieee80211_action_contains_tpc(skb)) 237 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 238 239 tx_cmd_params->tx_flags = cpu_to_le32(tx_flags); 240 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 241 tx_cmd_params->len = cpu_to_le16((u16)skb->len); 242 tx_cmd_params->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 243 tx_cmd_params->sta_id = sta_id; 244 245 tx_cmd_params->offload_assist = 246 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu)); 247 } 248 249 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, 250 struct ieee80211_tx_info *info, 251 struct ieee80211_sta *sta, __le16 fc) 252 { 253 if (info->band == NL80211_BAND_2GHZ && 254 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 255 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 256 257 if (sta && ieee80211_is_data(fc)) { 258 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 259 260 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS; 261 } 262 263 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 264 } 265 266 static u32 iwl_mvm_convert_rate_idx(struct iwl_mvm *mvm, 267 struct ieee80211_tx_info *info, 268 int rate_idx) 269 { 270 u32 rate_flags = 0; 271 u8 rate_plcp; 272 bool is_cck; 273 274 /* if the rate isn't a well known legacy rate, take the lowest one */ 275 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 276 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm, 277 info, 278 info->control.vif); 279 280 /* Get PLCP rate for tx_cmd->rate_n_flags */ 281 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx); 282 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && 283 (rate_idx <= IWL_LAST_CCK_RATE); 284 285 /* Set CCK or OFDM flag */ 286 if (!is_cck) 287 rate_flags |= RATE_MCS_MOD_TYPE_LEGACY_OFDM; 288 else 289 rate_flags |= RATE_MCS_MOD_TYPE_CCK; 290 291 return (u32)rate_plcp | rate_flags; 292 } 293 294 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm, 295 struct ieee80211_tx_info *info, 296 struct ieee80211_sta *sta, 297 __le16 fc) 298 { 299 struct ieee80211_tx_rate *rate = &info->control.rates[0]; 300 u32 result; 301 302 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { 303 u8 mcs = ieee80211_rate_get_vht_mcs(rate); 304 u8 nss = ieee80211_rate_get_vht_nss(rate); 305 306 result = RATE_MCS_MOD_TYPE_VHT; 307 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK); 308 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK); 309 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 310 result |= RATE_MCS_SGI_MSK; 311 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 312 result |= RATE_MCS_CHAN_WIDTH_40; 313 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 314 result |= RATE_MCS_CHAN_WIDTH_80; 315 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 316 result |= RATE_MCS_CHAN_WIDTH_160; 317 } else if (rate->flags & IEEE80211_TX_RC_MCS) { 318 result = RATE_MCS_MOD_TYPE_HT; 319 result |= u32_encode_bits(rate->idx & 0x7, 320 RATE_HT_MCS_CODE_MSK); 321 result |= u32_encode_bits(rate->idx >> 3, 322 RATE_MCS_NSS_MSK); 323 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 324 result |= RATE_MCS_SGI_MSK; 325 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 326 result |= RATE_MCS_CHAN_WIDTH_40; 327 if (info->flags & IEEE80211_TX_CTL_LDPC) 328 result |= RATE_MCS_LDPC_MSK; 329 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC)) 330 result |= RATE_MCS_STBC_MSK; 331 } else { 332 int rate_idx = info->control.rates[0].idx; 333 334 result = iwl_mvm_convert_rate_idx(mvm, info, rate_idx); 335 } 336 337 if (info->control.antennas) 338 result |= u32_encode_bits(info->control.antennas, 339 RATE_MCS_ANT_AB_MSK); 340 else 341 result |= iwl_mvm_get_tx_ant(mvm, info, sta, fc); 342 343 return result; 344 } 345 346 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 347 struct ieee80211_tx_info *info, 348 struct ieee80211_sta *sta, __le16 fc) 349 { 350 int rate_idx = -1; 351 352 if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { 353 /* info->control is only relevant for non HW rate control */ 354 355 /* HT rate doesn't make sense for a non data frame */ 356 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && 357 !ieee80211_is_data(fc), 358 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", 359 info->control.rates[0].flags, 360 info->control.rates[0].idx, 361 le16_to_cpu(fc), 362 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 363 364 rate_idx = info->control.rates[0].idx; 365 366 /* For non 2 GHZ band, remap mac80211 rate indices into driver 367 * indices. 368 */ 369 if (info->band != NL80211_BAND_2GHZ || 370 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE)) 371 rate_idx += IWL_FIRST_OFDM_RATE; 372 373 /* For 2.4 GHZ band, check that there is no need to remap */ 374 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 375 } 376 377 return iwl_mvm_convert_rate_idx(mvm, info, rate_idx); 378 } 379 380 static __le32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 381 struct ieee80211_tx_info *info, 382 struct ieee80211_sta *sta, __le16 fc) 383 { 384 u32 rate; 385 386 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) 387 rate = iwl_mvm_get_inject_tx_rate(mvm, info, sta, fc); 388 else 389 rate = iwl_mvm_get_tx_rate(mvm, info, sta, fc) | 390 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 391 392 return iwl_mvm_v3_rate_to_fw(rate, mvm->fw_rates_ver); 393 } 394 395 /* 396 * Sets the fields in the Tx cmd that are rate related 397 */ 398 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, 399 struct iwl_tx_cmd_v6_params *tx_cmd_params, 400 struct ieee80211_tx_info *info, 401 struct ieee80211_sta *sta, __le16 fc) 402 { 403 /* Set retry limit on RTS packets */ 404 tx_cmd_params->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 405 406 /* Set retry limit on DATA packets and Probe Responses*/ 407 if (ieee80211_is_probe_resp(fc)) { 408 tx_cmd_params->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 409 tx_cmd_params->rts_retry_limit = 410 min(tx_cmd_params->data_retry_limit, tx_cmd_params->rts_retry_limit); 411 } else if (ieee80211_is_back_req(fc)) { 412 tx_cmd_params->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 413 } else { 414 tx_cmd_params->data_retry_limit = IWL_DEFAULT_TX_RETRY; 415 } 416 417 /* 418 * for data packets, rate info comes from the table inside the fw. This 419 * table is controlled by LINK_QUALITY commands 420 */ 421 422 if (likely(ieee80211_is_data(fc) && sta && 423 !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) { 424 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 425 426 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 427 tx_cmd_params->initial_rate_index = 0; 428 tx_cmd_params->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 429 return; 430 } 431 } else if (ieee80211_is_back_req(fc)) { 432 tx_cmd_params->tx_flags |= 433 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 434 } 435 436 /* Set the rate in the TX cmd */ 437 tx_cmd_params->rate_n_flags = iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc); 438 } 439 440 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 441 u8 *crypto_hdr) 442 { 443 struct ieee80211_key_conf *keyconf = info->control.hw_key; 444 u64 pn; 445 446 pn = atomic64_inc_return(&keyconf->tx_pn); 447 crypto_hdr[0] = pn; 448 crypto_hdr[2] = 0; 449 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 450 crypto_hdr[1] = pn >> 8; 451 crypto_hdr[4] = pn >> 16; 452 crypto_hdr[5] = pn >> 24; 453 crypto_hdr[6] = pn >> 32; 454 crypto_hdr[7] = pn >> 40; 455 } 456 457 /* 458 * Sets the fields in the Tx cmd that are crypto related 459 */ 460 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 461 struct ieee80211_tx_info *info, 462 struct iwl_tx_cmd_v6_params *tx_cmd_params, 463 struct sk_buff *skb_frag, 464 int hdrlen) 465 { 466 struct ieee80211_key_conf *keyconf = info->control.hw_key; 467 u8 *crypto_hdr = skb_frag->data + hdrlen; 468 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 469 u64 pn; 470 471 switch (keyconf->cipher) { 472 case WLAN_CIPHER_SUITE_CCMP: 473 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd_params); 474 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 475 break; 476 477 case WLAN_CIPHER_SUITE_TKIP: 478 tx_cmd_params->sec_ctl = TX_CMD_SEC_TKIP; 479 pn = atomic64_inc_return(&keyconf->tx_pn); 480 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 481 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd_params->key); 482 break; 483 484 case WLAN_CIPHER_SUITE_WEP104: 485 tx_cmd_params->sec_ctl |= TX_CMD_SEC_KEY128; 486 fallthrough; 487 case WLAN_CIPHER_SUITE_WEP40: 488 tx_cmd_params->sec_ctl |= TX_CMD_SEC_WEP | 489 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 490 TX_CMD_SEC_WEP_KEY_IDX_MSK); 491 492 memcpy(&tx_cmd_params->key[3], keyconf->key, keyconf->keylen); 493 break; 494 case WLAN_CIPHER_SUITE_GCMP: 495 case WLAN_CIPHER_SUITE_GCMP_256: 496 type = TX_CMD_SEC_GCMP; 497 fallthrough; 498 case WLAN_CIPHER_SUITE_CCMP_256: 499 /* TODO: Taking the key from the table might introduce a race 500 * when PTK rekeying is done, having an old packets with a PN 501 * based on the old key but the message encrypted with a new 502 * one. 503 * Need to handle this. 504 */ 505 tx_cmd_params->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 506 tx_cmd_params->key[0] = keyconf->hw_key_idx; 507 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 508 break; 509 default: 510 tx_cmd_params->sec_ctl |= TX_CMD_SEC_EXT; 511 } 512 } 513 514 static bool iwl_mvm_use_host_rate(struct iwl_mvm *mvm, 515 struct iwl_mvm_sta *mvmsta, 516 struct ieee80211_hdr *hdr, 517 struct ieee80211_tx_info *info) 518 { 519 if (unlikely(!mvmsta)) 520 return true; 521 522 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) 523 return true; 524 525 if (likely(ieee80211_is_data(hdr->frame_control) && 526 mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED)) 527 return false; 528 529 /* 530 * Not a data frame, use host rate if on an old device that 531 * can't possibly be doing MLO (firmware may be selecting a 532 * bad rate), if we might be doing MLO we need to let FW pick 533 * (since we don't necesarily know the link), but FW rate 534 * selection was fixed. 535 */ 536 return mvm->trans->mac_cfg->device_family < IWL_DEVICE_FAMILY_BZ; 537 } 538 539 static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen, 540 const u8 *addr3_override) 541 { 542 struct ieee80211_hdr *out_hdr = cmd; 543 544 memcpy(cmd, hdr, hdrlen); 545 if (addr3_override) 546 memcpy(out_hdr->addr3, addr3_override, ETH_ALEN); 547 } 548 549 /* 550 * Allocates and sets the Tx cmd the driver data pointers in the skb 551 */ 552 static struct iwl_device_tx_cmd * 553 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 554 struct ieee80211_tx_info *info, int hdrlen, 555 struct ieee80211_sta *sta, u8 sta_id, 556 const u8 *addr3_override) 557 { 558 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 559 struct iwl_device_tx_cmd *dev_cmd; 560 struct iwl_tx_cmd_v6 *tx_cmd; 561 562 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 563 564 if (unlikely(!dev_cmd)) 565 return NULL; 566 567 dev_cmd->hdr.cmd = TX_CMD; 568 569 if (iwl_mvm_has_new_tx_api(mvm)) { 570 __le32 rate_n_flags = 0; 571 u16 flags = 0; 572 struct iwl_mvm_sta *mvmsta = sta ? 573 iwl_mvm_sta_from_mac80211(sta) : NULL; 574 bool amsdu = false; 575 576 if (ieee80211_is_data_qos(hdr->frame_control)) { 577 u8 *qc = ieee80211_get_qos_ctl(hdr); 578 579 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 580 } 581 582 if (!info->control.hw_key) 583 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 584 585 /* 586 * For data and mgmt packets rate info comes from the fw (for 587 * new devices, older FW is somewhat broken for this). Only 588 * set rate/antenna for injected frames with fixed rate, or 589 * when no sta is given, or with older firmware. 590 */ 591 if (unlikely(iwl_mvm_use_host_rate(mvm, mvmsta, hdr, info))) { 592 flags |= IWL_TX_FLAGS_CMD_RATE; 593 rate_n_flags = 594 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 595 hdr->frame_control); 596 } else if (!ieee80211_is_data(hdr->frame_control) || 597 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 598 /* These are important frames */ 599 flags |= IWL_TX_FLAGS_HIGH_PRI; 600 } 601 602 if (mvm->trans->mac_cfg->device_family >= 603 IWL_DEVICE_FAMILY_AX210) { 604 struct iwl_tx_cmd *cmd = (void *)dev_cmd->payload; 605 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, 606 info, amsdu); 607 608 cmd->offload_assist = cpu_to_le32(offload_assist); 609 610 /* Total # bytes to be transmitted */ 611 cmd->len = cpu_to_le16((u16)skb->len); 612 613 /* Copy MAC header from skb into command buffer */ 614 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override); 615 616 cmd->flags = cpu_to_le16(flags); 617 cmd->rate_n_flags = rate_n_flags; 618 } else { 619 struct iwl_tx_cmd_v9 *cmd = (void *)dev_cmd->payload; 620 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb, 621 info, amsdu); 622 623 cmd->offload_assist = cpu_to_le16(offload_assist); 624 625 /* Total # bytes to be transmitted */ 626 cmd->len = cpu_to_le16((u16)skb->len); 627 628 /* Copy MAC header from skb into command buffer */ 629 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override); 630 631 cmd->flags = cpu_to_le32(flags); 632 cmd->rate_n_flags = rate_n_flags; 633 } 634 goto out; 635 } 636 637 tx_cmd = (struct iwl_tx_cmd_v6 *)dev_cmd->payload; 638 639 if (info->control.hw_key) 640 iwl_mvm_set_tx_cmd_crypto(mvm, info, &tx_cmd->params, skb, hdrlen); 641 642 iwl_mvm_set_tx_cmd(mvm, skb, &tx_cmd->params, info, sta_id); 643 644 iwl_mvm_set_tx_cmd_rate(mvm, &tx_cmd->params, info, sta, hdr->frame_control); 645 646 /* Copy MAC header from skb into command buffer */ 647 iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override); 648 649 out: 650 return dev_cmd; 651 } 652 653 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 654 struct iwl_device_tx_cmd *cmd) 655 { 656 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 657 658 memset(&skb_info->status, 0, sizeof(skb_info->status)); 659 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 660 661 skb_info->driver_data[1] = cmd; 662 } 663 664 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 665 struct iwl_mvm_vif_link_info *link, 666 struct ieee80211_tx_info *info, 667 struct sk_buff *skb) 668 { 669 struct ieee80211_hdr *hdr = (void *)skb->data; 670 __le16 fc = hdr->frame_control; 671 672 switch (info->control.vif->type) { 673 case NL80211_IFTYPE_AP: 674 case NL80211_IFTYPE_ADHOC: 675 /* 676 * Non-bufferable frames use the broadcast station, thus they 677 * use the probe queue. 678 * Also take care of the case where we send a deauth to a 679 * station that we don't have, or similarly an association 680 * response (with non-success status) for a station we can't 681 * accept. 682 * Also, disassociate frames might happen, particular with 683 * reason 7 ("Class 3 frame received from nonassociated STA"). 684 */ 685 if (ieee80211_is_mgmt(fc) && 686 (!ieee80211_is_bufferable_mmpdu(skb) || 687 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 688 return link->mgmt_queue; 689 690 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 691 is_multicast_ether_addr(hdr->addr1)) 692 return link->cab_queue; 693 694 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 695 "fc=0x%02x", le16_to_cpu(fc)); 696 return link->mgmt_queue; 697 case NL80211_IFTYPE_P2P_DEVICE: 698 if (ieee80211_is_mgmt(fc)) 699 return mvm->p2p_dev_queue; 700 701 WARN_ON_ONCE(1); 702 return mvm->p2p_dev_queue; 703 default: 704 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 705 return -1; 706 } 707 } 708 709 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 710 struct sk_buff *skb) 711 { 712 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 713 struct iwl_mvm_vif *mvmvif = 714 iwl_mvm_vif_from_mac80211(info->control.vif); 715 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 716 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 717 struct iwl_probe_resp_data *resp_data; 718 const u8 *ie; 719 u8 *pos; 720 u8 match[] = { 721 (WLAN_OUI_WFA >> 16) & 0xff, 722 (WLAN_OUI_WFA >> 8) & 0xff, 723 WLAN_OUI_WFA & 0xff, 724 WLAN_OUI_TYPE_WFA_P2P, 725 }; 726 727 rcu_read_lock(); 728 729 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data); 730 if (!resp_data) 731 goto out; 732 733 if (!resp_data->notif.noa_active) 734 goto out; 735 736 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 737 mgmt->u.probe_resp.variable, 738 skb->len - base_len, 739 match, 4, 2); 740 if (!ie) { 741 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 742 goto out; 743 } 744 745 if (skb_tailroom(skb) < resp_data->noa_len) { 746 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 747 IWL_ERR(mvm, 748 "Failed to reallocate probe resp\n"); 749 goto out; 750 } 751 } 752 753 pos = skb_put(skb, resp_data->noa_len); 754 755 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 756 /* Set length of IE body (not including ID and length itself) */ 757 *pos++ = resp_data->noa_len - 2; 758 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 759 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 760 *pos++ = WLAN_OUI_WFA & 0xff; 761 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 762 763 memcpy(pos, &resp_data->notif.noa_attr, 764 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 765 766 out: 767 rcu_read_unlock(); 768 } 769 770 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 771 { 772 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 773 struct ieee80211_tx_info info; 774 struct iwl_device_tx_cmd *dev_cmd; 775 u8 sta_id; 776 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 777 __le16 fc = hdr->frame_control; 778 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 779 IEEE80211_TX_CTL_TX_OFFCHAN; 780 int queue = -1; 781 782 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 783 return -1; 784 785 memcpy(&info, skb->cb, sizeof(info)); 786 787 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 788 return -1; 789 790 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 791 return -1; 792 793 if (info.control.vif) { 794 struct iwl_mvm_vif *mvmvif = 795 iwl_mvm_vif_from_mac80211(info.control.vif); 796 bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm); 797 798 if ((info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE && 799 p2p_aux) || 800 (info.control.vif->type == NL80211_IFTYPE_STATION && 801 offchannel)) { 802 /* 803 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 804 * that can be used in 2 different types of vifs, P2P 805 * Device and STATION. 806 * P2P Device uses the offchannel queue. 807 * STATION (HS2.0) uses the auxiliary context of the FW, 808 * and hence needs to be sent on the aux queue. 809 * If P2P_DEV_OVER_AUX is supported (p2p_aux = true) 810 * also P2P Device uses the aux queue. 811 */ 812 sta_id = mvm->aux_sta.sta_id; 813 queue = mvm->aux_queue; 814 if (WARN_ON(queue == IWL_MVM_INVALID_QUEUE)) 815 return -1; 816 } else if (info.control.vif->type == 817 NL80211_IFTYPE_P2P_DEVICE || 818 info.control.vif->type == NL80211_IFTYPE_AP || 819 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 820 821 if (!ieee80211_is_data(hdr->frame_control)) 822 sta_id = mvmvif->deflink.bcast_sta.sta_id; 823 else 824 sta_id = mvmvif->deflink.mcast_sta.sta_id; 825 826 queue = iwl_mvm_get_ctrl_vif_queue(mvm, 827 &mvmvif->deflink, 828 &info, skb); 829 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 830 queue = mvm->snif_queue; 831 sta_id = mvm->snif_sta.sta_id; 832 } 833 } 834 835 if (queue < 0) { 836 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 837 return -1; 838 } 839 840 if (unlikely(ieee80211_is_probe_resp(fc))) 841 iwl_mvm_probe_resp_set_noa(mvm, skb); 842 843 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 844 845 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id, 846 NULL); 847 if (!dev_cmd) 848 return -1; 849 850 /* From now on, we cannot access info->control */ 851 iwl_mvm_skb_prepare_status(skb, dev_cmd); 852 853 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 854 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 855 return -1; 856 } 857 858 return 0; 859 } 860 861 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 862 struct ieee80211_sta *sta, unsigned int tid) 863 { 864 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 865 u8 ac = tid_to_mac80211_ac[tid]; 866 enum nl80211_band band; 867 unsigned int txf; 868 unsigned int val; 869 int lmac; 870 871 /* For HE redirect to trigger based fifos */ 872 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 873 ac += 4; 874 875 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 876 877 /* 878 * Don't send an AMSDU that will be longer than the TXF. 879 * Add a security margin of 256 for the TX command + headers. 880 * We also want to have the start of the next packet inside the 881 * fifo to be able to send bursts. 882 */ 883 val = mvmsta->max_amsdu_len; 884 885 band = mvmsta->vif->bss_conf.chanreq.oper.chan->band; 886 887 lmac = iwl_mvm_get_lmac_id(mvm, band); 888 889 return min_t(unsigned int, val, 890 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 891 } 892 893 #ifdef CONFIG_INET 894 895 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 896 struct ieee80211_tx_info *info, 897 struct ieee80211_sta *sta, 898 struct sk_buff_head *mpdus_skb) 899 { 900 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 901 struct ieee80211_hdr *hdr = (void *)skb->data; 902 unsigned int mss = skb_shinfo(skb)->gso_size; 903 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 904 u16 snap_ip_tcp, pad; 905 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 906 u8 tid; 907 908 snap_ip_tcp = 8 + skb_network_header_len(skb) + tcp_hdrlen(skb); 909 910 if (!mvmsta->max_amsdu_len || 911 !ieee80211_is_data_qos(hdr->frame_control) || 912 !mvmsta->amsdu_enabled) 913 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 914 915 /* 916 * Do not build AMSDU for IPv6 with extension headers. 917 * ask stack to segment and checkum the generated MPDUs for us. 918 */ 919 if (skb->protocol == htons(ETH_P_IPV6) && 920 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 921 IPPROTO_TCP) { 922 netdev_flags &= ~NETIF_F_CSUM_MASK; 923 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 924 } 925 926 tid = ieee80211_get_tid(hdr); 927 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 928 return -EINVAL; 929 930 /* 931 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 932 * during an BA session. 933 */ 934 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 935 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 936 !(mvmsta->amsdu_enabled & BIT(tid))) 937 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 938 939 /* 940 * Take the min of ieee80211 station and mvm station 941 */ 942 max_amsdu_len = 943 min_t(unsigned int, sta->cur->max_amsdu_len, 944 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 945 946 /* 947 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 948 * supported. This is a spec requirement (IEEE 802.11-2015 949 * section 8.7.3 NOTE 3). 950 */ 951 if (info->flags & IEEE80211_TX_CTL_AMPDU && 952 !sta->deflink.vht_cap.vht_supported) 953 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 954 955 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 956 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 957 pad = (4 - subf_len) & 0x3; 958 959 /* 960 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 961 * N * subf_len + (N - 1) * pad. 962 */ 963 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 964 965 if (sta->max_amsdu_subframes && 966 num_subframes > sta->max_amsdu_subframes) 967 num_subframes = sta->max_amsdu_subframes; 968 969 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 970 tcp_hdrlen(skb) + skb->data_len; 971 972 /* 973 * Make sure we have enough TBs for the A-MSDU: 974 * 2 for each subframe 975 * 1 more for each fragment 976 * 1 more for the potential data in the header 977 */ 978 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 979 mvm->trans->info.max_skb_frags) 980 num_subframes = 1; 981 982 if (num_subframes > 1) 983 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 984 985 /* This skb fits in one single A-MSDU */ 986 if (num_subframes * mss >= tcp_payload_len) { 987 __skb_queue_tail(mpdus_skb, skb); 988 return 0; 989 } 990 991 /* 992 * Trick the segmentation function to make it 993 * create SKBs that can fit into one A-MSDU. 994 */ 995 return iwl_tx_tso_segment(skb, num_subframes, netdev_flags, mpdus_skb); 996 } 997 #else /* CONFIG_INET */ 998 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 999 struct ieee80211_tx_info *info, 1000 struct ieee80211_sta *sta, 1001 struct sk_buff_head *mpdus_skb) 1002 { 1003 /* Impossible to get TSO with CONFIG_INET */ 1004 WARN_ON(1); 1005 1006 return -1; 1007 } 1008 #endif 1009 1010 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1011 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1012 { 1013 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1014 unsigned long now = jiffies; 1015 int tid; 1016 1017 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1018 return false; 1019 1020 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1021 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1022 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1023 return true; 1024 } 1025 1026 return false; 1027 } 1028 1029 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1030 struct iwl_mvm_sta *mvmsta, 1031 int airtime) 1032 { 1033 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1034 struct iwl_mvm_tcm_mac *mdata; 1035 1036 if (mac >= NUM_MAC_INDEX_DRIVER) 1037 return; 1038 1039 mdata = &mvm->tcm.data[mac]; 1040 1041 if (mvm->tcm.paused) 1042 return; 1043 1044 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1045 schedule_delayed_work(&mvm->tcm.work, 0); 1046 1047 mdata->tx.airtime += airtime; 1048 } 1049 1050 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1051 struct iwl_mvm_sta *mvmsta, int tid) 1052 { 1053 u32 ac = tid_to_mac80211_ac[tid]; 1054 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1055 struct iwl_mvm_tcm_mac *mdata; 1056 1057 if (mac >= NUM_MAC_INDEX_DRIVER) 1058 return -EINVAL; 1059 1060 mdata = &mvm->tcm.data[mac]; 1061 1062 mdata->tx.pkts[ac]++; 1063 1064 return 0; 1065 } 1066 1067 /* 1068 * Sets the fields in the Tx cmd that are crypto related. 1069 * 1070 * This function must be called with BHs disabled. 1071 */ 1072 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1073 struct ieee80211_tx_info *info, 1074 struct ieee80211_sta *sta, 1075 const u8 *addr3_override) 1076 { 1077 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1078 struct iwl_mvm_sta *mvmsta; 1079 struct iwl_device_tx_cmd *dev_cmd; 1080 __le16 fc; 1081 u16 seq_number = 0; 1082 u8 tid = IWL_MAX_TID_COUNT; 1083 u16 txq_id; 1084 bool is_ampdu = false; 1085 int hdrlen; 1086 1087 if (WARN_ON_ONCE(!sta)) 1088 return -1; 1089 1090 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1091 fc = hdr->frame_control; 1092 hdrlen = ieee80211_hdrlen(fc); 1093 1094 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1095 return -1; 1096 1097 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_INVALID_STA)) 1098 return -1; 1099 1100 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he) 1101 return -1; 1102 1103 if (unlikely(ieee80211_is_probe_resp(fc))) 1104 iwl_mvm_probe_resp_set_noa(mvm, skb); 1105 1106 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1107 sta, mvmsta->deflink.sta_id, 1108 addr3_override); 1109 if (!dev_cmd) 1110 goto drop; 1111 1112 /* 1113 * we handle that entirely ourselves -- for uAPSD the firmware 1114 * will always send a notification, and for PS-Poll responses 1115 * we'll notify mac80211 when getting frame status 1116 */ 1117 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1118 1119 spin_lock(&mvmsta->lock); 1120 1121 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1122 * the conditions of !ieee80211_is_qos_nullfunc(fc) and 1123 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID 1124 */ 1125 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1126 tid = ieee80211_get_tid(hdr); 1127 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1128 goto drop_unlock_sta; 1129 1130 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1131 if (WARN_ONCE(is_ampdu && 1132 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1133 "Invalid internal agg state %d for TID %d", 1134 mvmsta->tid_data[tid].state, tid)) 1135 goto drop_unlock_sta; 1136 1137 seq_number = mvmsta->tid_data[tid].seq_number; 1138 seq_number &= IEEE80211_SCTL_SEQ; 1139 1140 if (!iwl_mvm_has_new_tx_api(mvm)) { 1141 struct iwl_tx_cmd_v6 *tx_cmd = (void *)dev_cmd->payload; 1142 1143 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1144 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1145 /* update the tx_cmd hdr as it was already copied */ 1146 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1147 } 1148 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) && 1149 !ieee80211_is_nullfunc(fc)) { 1150 tid = IWL_TID_NON_QOS; 1151 } 1152 1153 txq_id = mvmsta->tid_data[tid].txq_id; 1154 1155 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1156 1157 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1158 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1159 spin_unlock(&mvmsta->lock); 1160 return -1; 1161 } 1162 1163 if (!iwl_mvm_has_new_tx_api(mvm)) { 1164 /* Keep track of the time of the last frame for this RA/TID */ 1165 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1166 1167 /* 1168 * If we have timed-out TIDs - schedule the worker that will 1169 * reconfig the queues and update them 1170 * 1171 * Note that the no lock is taken here in order to not serialize 1172 * the TX flow. This isn't dangerous because scheduling 1173 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1174 * schedule it due to some race condition then next TX we get 1175 * here we will. 1176 */ 1177 if (unlikely(mvm->queue_info[txq_id].status == 1178 IWL_MVM_QUEUE_SHARED && 1179 iwl_mvm_txq_should_update(mvm, txq_id))) 1180 schedule_work(&mvm->add_stream_wk); 1181 } 1182 1183 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1184 mvmsta->deflink.sta_id, tid, txq_id, 1185 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1186 1187 /* From now on, we cannot access info->control */ 1188 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1189 1190 /* 1191 * The IV is introduced by the HW for new tx api, and it is not present 1192 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the 1193 * IV for those devices. 1194 */ 1195 if (ieee80211_is_data(fc)) 1196 iwl_mvm_mei_tx_copy_to_csme(mvm, skb, 1197 info->control.hw_key && 1198 !iwl_mvm_has_new_tx_api(mvm) ? 1199 info->control.hw_key->iv_len : 0); 1200 1201 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1202 goto drop_unlock_sta; 1203 1204 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1205 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1206 1207 spin_unlock(&mvmsta->lock); 1208 1209 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1210 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1211 goto drop; 1212 1213 return 0; 1214 1215 drop_unlock_sta: 1216 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1217 spin_unlock(&mvmsta->lock); 1218 drop: 1219 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id, 1220 tid); 1221 return -1; 1222 } 1223 1224 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1225 struct ieee80211_sta *sta) 1226 { 1227 struct iwl_mvm_sta *mvmsta; 1228 struct ieee80211_tx_info info; 1229 struct sk_buff_head mpdus_skbs; 1230 struct ieee80211_vif *vif; 1231 unsigned int payload_len; 1232 int ret; 1233 struct sk_buff *orig_skb = skb; 1234 const u8 *addr3; 1235 1236 if (WARN_ON_ONCE(!sta)) 1237 return -1; 1238 1239 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1240 1241 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_INVALID_STA)) 1242 return -1; 1243 1244 memcpy(&info, skb->cb, sizeof(info)); 1245 1246 if (!skb_is_gso(skb)) 1247 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL); 1248 1249 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1250 tcp_hdrlen(skb) + skb->data_len; 1251 1252 if (payload_len <= skb_shinfo(skb)->gso_size) 1253 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL); 1254 1255 __skb_queue_head_init(&mpdus_skbs); 1256 1257 vif = info.control.vif; 1258 if (!vif) 1259 return -1; 1260 1261 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1262 if (ret) 1263 return ret; 1264 1265 WARN_ON(skb_queue_empty(&mpdus_skbs)); 1266 1267 /* 1268 * As described in IEEE sta 802.11-2020, table 9-30 (Address 1269 * field contents), A-MSDU address 3 should contain the BSSID 1270 * address. 1271 * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it 1272 * in the command header. We need to preserve the original 1273 * address 3 in the skb header to correctly create all the 1274 * A-MSDU subframe headers from it. 1275 */ 1276 switch (vif->type) { 1277 case NL80211_IFTYPE_STATION: 1278 addr3 = vif->cfg.ap_addr; 1279 break; 1280 case NL80211_IFTYPE_AP: 1281 addr3 = vif->addr; 1282 break; 1283 default: 1284 addr3 = NULL; 1285 break; 1286 } 1287 1288 while (!skb_queue_empty(&mpdus_skbs)) { 1289 struct ieee80211_hdr *hdr; 1290 bool amsdu; 1291 1292 skb = __skb_dequeue(&mpdus_skbs); 1293 hdr = (void *)skb->data; 1294 amsdu = ieee80211_is_data_qos(hdr->frame_control) && 1295 (*ieee80211_get_qos_ctl(hdr) & 1296 IEEE80211_QOS_CTL_A_MSDU_PRESENT); 1297 1298 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta, 1299 amsdu ? addr3 : NULL); 1300 if (ret) { 1301 /* Free skbs created as part of TSO logic that have not yet been dequeued */ 1302 __skb_queue_purge(&mpdus_skbs); 1303 /* skb here is not necessarily same as skb that entered this method, 1304 * so free it explicitly. 1305 */ 1306 if (skb == orig_skb) 1307 ieee80211_free_txskb(mvm->hw, skb); 1308 else 1309 kfree_skb(skb); 1310 /* there was error, but we consumed skb one way or another, so return 0 */ 1311 return 0; 1312 } 1313 } 1314 1315 return 0; 1316 } 1317 1318 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1319 struct ieee80211_sta *sta, u8 tid) 1320 { 1321 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1322 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1323 struct ieee80211_vif *vif = mvmsta->vif; 1324 u16 normalized_ssn; 1325 1326 lockdep_assert_held(&mvmsta->lock); 1327 1328 if (tid_data->state == IWL_AGG_ON && 1329 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1330 /* 1331 * Now that this aggregation or DQA queue is empty tell 1332 * mac80211 so it knows we no longer have frames buffered for 1333 * the station on this TID (for the TIM bitmap calculation.) 1334 */ 1335 ieee80211_sta_set_buffered(sta, tid, false); 1336 } 1337 1338 /* 1339 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1340 * to align the wrap around of ssn so we compare relevant values. 1341 */ 1342 normalized_ssn = tid_data->ssn; 1343 if (mvm->trans->mac_cfg->gen2) 1344 normalized_ssn &= 0xff; 1345 1346 if (normalized_ssn != tid_data->next_reclaimed) 1347 return; 1348 1349 switch (tid_data->state) { 1350 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1351 IWL_DEBUG_TX_QUEUES(mvm, 1352 "Can continue addBA flow ssn = next_recl = %d\n", 1353 tid_data->next_reclaimed); 1354 tid_data->state = IWL_AGG_STARTING; 1355 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1356 break; 1357 default: 1358 break; 1359 } 1360 } 1361 1362 #ifdef CONFIG_IWLWIFI_DEBUG 1363 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1364 { 1365 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1366 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1367 1368 switch (status & TX_STATUS_MSK) { 1369 case TX_STATUS_SUCCESS: 1370 return "SUCCESS"; 1371 TX_STATUS_POSTPONE(DELAY); 1372 TX_STATUS_POSTPONE(FEW_BYTES); 1373 TX_STATUS_POSTPONE(BT_PRIO); 1374 TX_STATUS_POSTPONE(QUIET_PERIOD); 1375 TX_STATUS_POSTPONE(CALC_TTAK); 1376 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1377 TX_STATUS_FAIL(SHORT_LIMIT); 1378 TX_STATUS_FAIL(LONG_LIMIT); 1379 TX_STATUS_FAIL(UNDERRUN); 1380 TX_STATUS_FAIL(DRAIN_FLOW); 1381 TX_STATUS_FAIL(RFKILL_FLUSH); 1382 TX_STATUS_FAIL(LIFE_EXPIRE); 1383 TX_STATUS_FAIL(DEST_PS); 1384 TX_STATUS_FAIL(HOST_ABORTED); 1385 TX_STATUS_FAIL(BT_RETRY); 1386 TX_STATUS_FAIL(STA_INVALID); 1387 TX_STATUS_FAIL(FRAG_DROPPED); 1388 TX_STATUS_FAIL(TID_DISABLE); 1389 TX_STATUS_FAIL(FIFO_FLUSHED); 1390 TX_STATUS_FAIL(SMALL_CF_POLL); 1391 TX_STATUS_FAIL(FW_DROP); 1392 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1393 } 1394 1395 return "UNKNOWN"; 1396 1397 #undef TX_STATUS_FAIL 1398 #undef TX_STATUS_POSTPONE 1399 } 1400 #endif /* CONFIG_IWLWIFI_DEBUG */ 1401 1402 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1403 { 1404 switch (chan_width) { 1405 case RATE_MCS_CHAN_WIDTH_20: 1406 return 0; 1407 case RATE_MCS_CHAN_WIDTH_40: 1408 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1409 case RATE_MCS_CHAN_WIDTH_80: 1410 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1411 case RATE_MCS_CHAN_WIDTH_160: 1412 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1413 default: 1414 return 0; 1415 } 1416 } 1417 1418 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1419 enum nl80211_band band, 1420 struct ieee80211_tx_rate *r) 1421 { 1422 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1423 u32 rate = format == RATE_MCS_MOD_TYPE_HT ? 1424 RATE_HT_MCS_INDEX(rate_n_flags) : 1425 rate_n_flags & RATE_MCS_CODE_MSK; 1426 1427 r->flags |= 1428 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1429 RATE_MCS_CHAN_WIDTH_MSK); 1430 1431 if (rate_n_flags & RATE_MCS_SGI_MSK) 1432 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1433 switch (format) { 1434 case RATE_MCS_MOD_TYPE_HT: 1435 r->flags |= IEEE80211_TX_RC_MCS; 1436 r->idx = rate; 1437 break; 1438 case RATE_MCS_MOD_TYPE_VHT: 1439 ieee80211_rate_set_vht(r, rate, 1440 FIELD_GET(RATE_MCS_NSS_MSK, 1441 rate_n_flags) + 1); 1442 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1443 break; 1444 case RATE_MCS_MOD_TYPE_HE: 1445 case RATE_MCS_MOD_TYPE_EHT: 1446 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1447 * but it only matters for radiotap */ 1448 r->idx = 0; 1449 break; 1450 default: 1451 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1452 band); 1453 } 1454 } 1455 1456 /* 1457 * translate ucode response to mac80211 tx status control values 1458 */ 1459 static void iwl_mvm_hwrate_to_tx_status(struct iwl_mvm *mvm, 1460 __le32 rate_n_flags, 1461 struct ieee80211_tx_info *info) 1462 { 1463 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1464 u32 rate; 1465 1466 /* 1467 * Technically this conversion is incorrect for BA status, however: 1468 * - we only use the BA notif data for older firmware that have 1469 * host rate scaling and don't use newer rate formats 1470 * - the firmware API changed together for BA notif and TX CMD 1471 * as well 1472 */ 1473 rate = iwl_mvm_v3_rate_from_fw(rate_n_flags, mvm->fw_rates_ver); 1474 1475 info->status.antenna = 1476 ((rate & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1477 iwl_mvm_hwrate_to_tx_rate(rate, info->band, r); 1478 } 1479 1480 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1481 u32 status, __le16 frame_control) 1482 { 1483 struct iwl_fw_dbg_trigger_tlv *trig; 1484 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1485 int i; 1486 1487 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1488 enum iwl_fw_ini_time_point tp = 1489 IWL_FW_INI_TIME_POINT_TX_FAILED; 1490 1491 if (ieee80211_is_action(frame_control)) 1492 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1493 1494 iwl_dbg_tlv_time_point(&mvm->fwrt, 1495 tp, NULL); 1496 return; 1497 } 1498 1499 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1500 FW_DBG_TRIGGER_TX_STATUS); 1501 if (!trig) 1502 return; 1503 1504 status_trig = (void *)trig->data; 1505 1506 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1507 /* don't collect on status 0 */ 1508 if (!status_trig->statuses[i].status) 1509 break; 1510 1511 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1512 continue; 1513 1514 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1515 "Tx status %d was received", 1516 status & TX_STATUS_MSK); 1517 break; 1518 } 1519 } 1520 1521 /* 1522 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1523 * @tx_resp: the Tx response from the fw (agg or non-agg) 1524 * 1525 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1526 * it can't know that everything will go well until the end of the AMPDU, it 1527 * can't know in advance the number of MPDUs that will be sent in the current 1528 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1529 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1530 * of the batch. This is why the SSN of the SCD is written at the end of the 1531 * whole struct at a variable offset. This function knows how to cope with the 1532 * variable offset and returns the SSN of the SCD. 1533 * 1534 * For 22000-series and lower, this is just 12 bits. For later, 16 bits. 1535 */ 1536 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1537 struct iwl_tx_resp *tx_resp) 1538 { 1539 u32 val = le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1540 tx_resp->frame_count); 1541 1542 if (mvm->trans->mac_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 1543 return val & 0xFFFF; 1544 return val & 0xFFF; 1545 } 1546 1547 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1548 struct iwl_rx_packet *pkt) 1549 { 1550 struct ieee80211_sta *sta; 1551 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1552 int txq_id = SEQ_TO_QUEUE(sequence); 1553 /* struct iwl_tx_resp_v3 is almost the same */ 1554 struct iwl_tx_resp *tx_resp = (void *)pkt->data; 1555 int sta_id = IWL_TX_RES_GET_RA(tx_resp->ra_tid); 1556 int tid = IWL_TX_RES_GET_TID(tx_resp->ra_tid); 1557 struct agg_tx_status *agg_status = 1558 iwl_mvm_get_agg_status(mvm, tx_resp); 1559 u32 status = le16_to_cpu(agg_status->status); 1560 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1561 struct sk_buff_head skbs; 1562 u8 skb_freed = 0; 1563 u8 lq_color; 1564 u16 next_reclaimed, seq_ctl; 1565 bool is_ndp = false; 1566 1567 __skb_queue_head_init(&skbs); 1568 1569 if (iwl_mvm_has_new_tx_api(mvm)) 1570 txq_id = le16_to_cpu(tx_resp->tx_queue); 1571 1572 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1573 1574 /* we can free until ssn % q.n_bd not inclusive */ 1575 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false); 1576 1577 while (!skb_queue_empty(&skbs)) { 1578 struct sk_buff *skb = __skb_dequeue(&skbs); 1579 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1580 struct ieee80211_hdr *hdr = (void *)skb->data; 1581 bool flushed = false; 1582 1583 skb_freed++; 1584 1585 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1586 1587 memset(&info->status, 0, sizeof(info->status)); 1588 info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED); 1589 1590 /* inform mac80211 about what happened with the frame */ 1591 switch (status & TX_STATUS_MSK) { 1592 case TX_STATUS_SUCCESS: 1593 case TX_STATUS_DIRECT_DONE: 1594 info->flags |= IEEE80211_TX_STAT_ACK; 1595 break; 1596 case TX_STATUS_FAIL_FIFO_FLUSHED: 1597 case TX_STATUS_FAIL_DRAIN_FLOW: 1598 flushed = true; 1599 break; 1600 case TX_STATUS_FAIL_DEST_PS: 1601 /* the FW should have stopped the queue and not 1602 * return this status 1603 */ 1604 IWL_ERR_LIMIT(mvm, 1605 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1606 status, le16_to_cpu(hdr->frame_control)); 1607 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1608 break; 1609 default: 1610 break; 1611 } 1612 1613 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1614 ieee80211_is_mgmt(hdr->frame_control)) 1615 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1616 1617 /* 1618 * If we are freeing multiple frames, mark all the frames 1619 * but the first one as acked, since they were acknowledged 1620 * before 1621 * */ 1622 if (skb_freed > 1) 1623 info->flags |= IEEE80211_TX_STAT_ACK; 1624 1625 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1626 1627 info->status.rates[0].count = tx_resp->failure_frame + 1; 1628 1629 iwl_mvm_hwrate_to_tx_status(mvm, tx_resp->initial_rate, info); 1630 1631 /* Don't assign the converted initial_rate, because driver 1632 * TLC uses this and doesn't support the new FW rate 1633 */ 1634 info->status.status_driver_data[1] = 1635 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1636 1637 /* Single frame failure in an AMPDU queue => send BAR */ 1638 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1639 !(info->flags & IEEE80211_TX_STAT_ACK) && 1640 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1641 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1642 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1643 1644 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1645 if (ieee80211_is_back_req(hdr->frame_control)) 1646 seq_ctl = 0; 1647 else if (status != TX_STATUS_SUCCESS) 1648 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1649 1650 if (unlikely(!seq_ctl)) { 1651 /* 1652 * If it is an NDP, we can't update next_reclaim since 1653 * its sequence control is 0. Note that for that same 1654 * reason, NDPs are never sent to A-MPDU'able queues 1655 * so that we can never have more than one freed frame 1656 * for a single Tx resonse (see WARN_ON below). 1657 */ 1658 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1659 is_ndp = true; 1660 } 1661 1662 /* 1663 * TODO: this is not accurate if we are freeing more than one 1664 * packet. 1665 */ 1666 info->status.tx_time = 1667 le16_to_cpu(tx_resp->wireless_media_time); 1668 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1669 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1670 info->status.status_driver_data[0] = 1671 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1672 1673 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1))) 1674 ieee80211_tx_status_skb(mvm->hw, skb); 1675 } 1676 1677 /* This is an aggregation queue or might become one, so we use 1678 * the ssn since: ssn = wifi seq_num % 256. 1679 * The seq_ctl is the sequence control of the packet to which 1680 * this Tx response relates. But if there is a hole in the 1681 * bitmap of the BA we received, this Tx response may allow to 1682 * reclaim the hole and all the subsequent packets that were 1683 * already acked. In that case, seq_ctl != ssn, and the next 1684 * packet to be reclaimed will be ssn and not seq_ctl. In that 1685 * case, several packets will be reclaimed even if 1686 * frame_count = 1. 1687 * 1688 * The ssn is the index (% 256) of the latest packet that has 1689 * treated (acked / dropped) + 1. 1690 */ 1691 next_reclaimed = ssn; 1692 1693 IWL_DEBUG_TX_REPLY(mvm, 1694 "TXQ %d status %s (0x%08x)\n", 1695 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1696 1697 IWL_DEBUG_TX_REPLY(mvm, 1698 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1699 le32_to_cpu(tx_resp->initial_rate), 1700 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1701 ssn, next_reclaimed, seq_ctl); 1702 1703 rcu_read_lock(); 1704 1705 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1706 /* 1707 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1708 * the firmware while we still have packets for it in the Tx queues. 1709 */ 1710 if (WARN_ON_ONCE(!sta)) 1711 goto out; 1712 1713 if (!IS_ERR(sta)) { 1714 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1715 1716 iwl_mvm_tx_airtime(mvm, mvmsta, 1717 le16_to_cpu(tx_resp->wireless_media_time)); 1718 1719 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1720 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1721 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1722 1723 if (sta->wme && tid != IWL_MGMT_TID) { 1724 struct iwl_mvm_tid_data *tid_data = 1725 &mvmsta->tid_data[tid]; 1726 bool send_eosp_ndp = false; 1727 1728 spin_lock_bh(&mvmsta->lock); 1729 1730 if (!is_ndp) { 1731 tid_data->next_reclaimed = next_reclaimed; 1732 IWL_DEBUG_TX_REPLY(mvm, 1733 "Next reclaimed packet:%d\n", 1734 next_reclaimed); 1735 } else { 1736 IWL_DEBUG_TX_REPLY(mvm, 1737 "NDP - don't update next_reclaimed\n"); 1738 } 1739 1740 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1741 1742 if (mvmsta->sleep_tx_count) { 1743 mvmsta->sleep_tx_count--; 1744 if (mvmsta->sleep_tx_count && 1745 !iwl_mvm_tid_queued(mvm, tid_data)) { 1746 /* 1747 * The number of frames in the queue 1748 * dropped to 0 even if we sent less 1749 * frames than we thought we had on the 1750 * Tx queue. 1751 * This means we had holes in the BA 1752 * window that we just filled, ask 1753 * mac80211 to send EOSP since the 1754 * firmware won't know how to do that. 1755 * Send NDP and the firmware will send 1756 * EOSP notification that will trigger 1757 * a call to ieee80211_sta_eosp(). 1758 */ 1759 send_eosp_ndp = true; 1760 } 1761 } 1762 1763 spin_unlock_bh(&mvmsta->lock); 1764 if (send_eosp_ndp) { 1765 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1766 IEEE80211_FRAME_RELEASE_UAPSD, 1767 1, tid, false, false); 1768 mvmsta->sleep_tx_count = 0; 1769 ieee80211_send_eosp_nullfunc(sta, tid); 1770 } 1771 } 1772 1773 if (mvmsta->next_status_eosp) { 1774 mvmsta->next_status_eosp = false; 1775 ieee80211_sta_eosp(sta); 1776 } 1777 } 1778 out: 1779 rcu_read_unlock(); 1780 } 1781 1782 #ifdef CONFIG_IWLWIFI_DEBUG 1783 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1784 static const char *iwl_get_agg_tx_status(u16 status) 1785 { 1786 switch (status & AGG_TX_STATE_STATUS_MSK) { 1787 AGG_TX_STATE_(TRANSMITTED); 1788 AGG_TX_STATE_(UNDERRUN); 1789 AGG_TX_STATE_(BT_PRIO); 1790 AGG_TX_STATE_(FEW_BYTES); 1791 AGG_TX_STATE_(ABORT); 1792 AGG_TX_STATE_(TX_ON_AIR_DROP); 1793 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1794 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1795 AGG_TX_STATE_(SCD_QUERY); 1796 AGG_TX_STATE_(TEST_BAD_CRC32); 1797 AGG_TX_STATE_(RESPONSE); 1798 AGG_TX_STATE_(DUMP_TX); 1799 AGG_TX_STATE_(DELAY_TX); 1800 } 1801 1802 return "UNKNOWN"; 1803 } 1804 1805 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1806 struct iwl_rx_packet *pkt) 1807 { 1808 struct iwl_tx_resp *tx_resp = (void *)pkt->data; 1809 struct agg_tx_status *frame_status = 1810 iwl_mvm_get_agg_status(mvm, tx_resp); 1811 int i; 1812 bool tirgger_timepoint = false; 1813 1814 for (i = 0; i < tx_resp->frame_count; i++) { 1815 u16 fstatus = le16_to_cpu(frame_status[i].status); 1816 /* In case one frame wasn't transmitted trigger time point */ 1817 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1818 AGG_TX_STATE_TRANSMITTED); 1819 IWL_DEBUG_TX_REPLY(mvm, 1820 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1821 iwl_get_agg_tx_status(fstatus), 1822 fstatus & AGG_TX_STATE_STATUS_MSK, 1823 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1824 AGG_TX_STATE_TRY_CNT_POS, 1825 le16_to_cpu(frame_status[i].sequence)); 1826 } 1827 1828 if (tirgger_timepoint) 1829 iwl_dbg_tlv_time_point(&mvm->fwrt, 1830 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1831 1832 } 1833 #else 1834 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1835 struct iwl_rx_packet *pkt) 1836 {} 1837 #endif /* CONFIG_IWLWIFI_DEBUG */ 1838 1839 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1840 struct iwl_rx_packet *pkt) 1841 { 1842 struct iwl_tx_resp *tx_resp = (void *)pkt->data; 1843 int sta_id = IWL_TX_RES_GET_RA(tx_resp->ra_tid); 1844 int tid = IWL_TX_RES_GET_TID(tx_resp->ra_tid); 1845 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1846 struct iwl_mvm_sta *mvmsta; 1847 int queue = SEQ_TO_QUEUE(sequence); 1848 struct ieee80211_sta *sta; 1849 1850 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1851 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1852 return; 1853 1854 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1855 1856 rcu_read_lock(); 1857 1858 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1859 1860 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1861 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) { 1862 rcu_read_unlock(); 1863 return; 1864 } 1865 1866 if (!WARN_ON_ONCE(!mvmsta)) { 1867 mvmsta->tid_data[tid].rate_n_flags = 1868 tx_resp->initial_rate; 1869 mvmsta->tid_data[tid].tx_time = 1870 le16_to_cpu(tx_resp->wireless_media_time); 1871 mvmsta->tid_data[tid].lq_color = 1872 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1873 iwl_mvm_tx_airtime(mvm, mvmsta, 1874 le16_to_cpu(tx_resp->wireless_media_time)); 1875 } 1876 1877 rcu_read_unlock(); 1878 } 1879 1880 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1881 { 1882 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1883 struct iwl_tx_resp *tx_resp = (void *)pkt->data; 1884 1885 if (tx_resp->frame_count == 1) 1886 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1887 else 1888 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1889 } 1890 1891 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1892 int txq, int index, 1893 struct ieee80211_tx_info *tx_info, __le32 rate, 1894 bool is_flush) 1895 { 1896 struct sk_buff_head reclaimed_skbs; 1897 struct iwl_mvm_tid_data *tid_data = NULL; 1898 struct ieee80211_sta *sta; 1899 struct iwl_mvm_sta *mvmsta = NULL; 1900 struct sk_buff *skb; 1901 int freed; 1902 1903 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1904 tid > IWL_MAX_TID_COUNT, 1905 "sta_id %d tid %d", sta_id, tid)) 1906 return; 1907 1908 rcu_read_lock(); 1909 1910 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1911 1912 /* Reclaiming frames for a station that has been deleted ? */ 1913 if (WARN_ON_ONCE(!sta)) { 1914 rcu_read_unlock(); 1915 return; 1916 } 1917 1918 __skb_queue_head_init(&reclaimed_skbs); 1919 1920 /* 1921 * Release all TFDs before the SSN, i.e. all TFDs in front of 1922 * block-ack window (we assume that they've been successfully 1923 * transmitted ... if not, it's too late anyway). 1924 */ 1925 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush); 1926 1927 skb_queue_walk(&reclaimed_skbs, skb) { 1928 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1929 1930 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1931 1932 memset(&info->status, 0, sizeof(info->status)); 1933 /* Packet was transmitted successfully, failures come as single 1934 * frames because before failing a frame the firmware transmits 1935 * it without aggregation at least once. 1936 */ 1937 if (!is_flush) 1938 info->flags |= IEEE80211_TX_STAT_ACK; 1939 else 1940 info->flags &= ~IEEE80211_TX_STAT_ACK; 1941 } 1942 1943 /* 1944 * It's possible to get a BA response after invalidating the rcu (rcu is 1945 * invalidated in order to prevent new Tx from being sent, but there may 1946 * be some frames already in-flight). 1947 * In this case we just want to reclaim, and could skip all the 1948 * sta-dependent stuff since it's in the middle of being removed 1949 * anyways. 1950 */ 1951 if (IS_ERR(sta)) 1952 goto out; 1953 1954 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1955 tid_data = &mvmsta->tid_data[tid]; 1956 1957 if (tid_data->txq_id != txq) { 1958 IWL_ERR(mvm, 1959 "invalid reclaim request: Q %d, tid %d\n", 1960 tid_data->txq_id, tid); 1961 rcu_read_unlock(); 1962 return; 1963 } 1964 1965 spin_lock_bh(&mvmsta->lock); 1966 1967 tid_data->next_reclaimed = index; 1968 1969 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1970 1971 freed = 0; 1972 1973 /* pack lq color from tid_data along the reduced txp */ 1974 tx_info->status.status_driver_data[0] = 1975 RS_DRV_DATA_PACK(tid_data->lq_color, 1976 tx_info->status.status_driver_data[0]); 1977 /* the value is only consumed for old FW that has v1 rates anyway */ 1978 tx_info->status.status_driver_data[1] = 1979 (void *)(uintptr_t)le32_to_cpu(rate); 1980 1981 skb_queue_walk(&reclaimed_skbs, skb) { 1982 struct ieee80211_hdr *hdr = (void *)skb->data; 1983 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1984 1985 if (!is_flush) { 1986 if (ieee80211_is_data_qos(hdr->frame_control)) 1987 freed++; 1988 else 1989 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1990 } 1991 1992 /* this is the first skb we deliver in this batch */ 1993 /* put the rate scaling data there */ 1994 if (freed == 1) { 1995 info->flags |= IEEE80211_TX_STAT_AMPDU; 1996 memcpy(&info->status, &tx_info->status, 1997 sizeof(tx_info->status)); 1998 iwl_mvm_hwrate_to_tx_status(mvm, rate, info); 1999 } 2000 } 2001 2002 spin_unlock_bh(&mvmsta->lock); 2003 2004 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 2005 * possible (i.e. first MPDU in the aggregation wasn't acked) 2006 * Still it's important to update RS about sent vs. acked. 2007 */ 2008 if (!is_flush && skb_queue_empty(&reclaimed_skbs) && 2009 !iwl_mvm_has_tlc_offload(mvm)) { 2010 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 2011 2012 /* no TLC offload, so non-MLD mode */ 2013 if (mvmsta->vif) 2014 chanctx_conf = 2015 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf); 2016 2017 if (WARN_ON_ONCE(!chanctx_conf)) 2018 goto out; 2019 2020 tx_info->band = chanctx_conf->def.chan->band; 2021 iwl_mvm_hwrate_to_tx_status(mvm, rate, tx_info); 2022 2023 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 2024 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 2025 } 2026 2027 out: 2028 rcu_read_unlock(); 2029 2030 while (!skb_queue_empty(&reclaimed_skbs)) { 2031 skb = __skb_dequeue(&reclaimed_skbs); 2032 ieee80211_tx_status_skb(mvm->hw, skb); 2033 } 2034 } 2035 2036 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2037 { 2038 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2039 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 2040 int sta_id, tid, txq, index; 2041 struct ieee80211_tx_info ba_info = {}; 2042 struct iwl_mvm_ba_notif *ba_notif; 2043 struct iwl_mvm_tid_data *tid_data; 2044 struct iwl_mvm_sta *mvmsta; 2045 2046 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 2047 2048 if (iwl_mvm_has_new_tx_api(mvm)) { 2049 struct iwl_compressed_ba_notif *ba_res = 2050 (void *)pkt->data; 2051 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 2052 u16 tfd_cnt; 2053 int i; 2054 2055 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len, 2056 "short BA notification (%d)\n", pkt_len)) 2057 return; 2058 2059 sta_id = ba_res->sta_id; 2060 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 2061 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 2062 ba_info.status.tx_time = 2063 (u16)le32_to_cpu(ba_res->wireless_time); 2064 ba_info.status.status_driver_data[0] = 2065 (void *)(uintptr_t)ba_res->reduced_txp; 2066 2067 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 2068 if (!tfd_cnt) 2069 return; 2070 2071 if (IWL_FW_CHECK(mvm, 2072 struct_size(ba_res, tfd, tfd_cnt) > pkt_len, 2073 "short BA notification (tfds:%d, size:%d)\n", 2074 tfd_cnt, pkt_len)) 2075 return; 2076 2077 IWL_DEBUG_TX_REPLY(mvm, 2078 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2079 sta_id, le32_to_cpu(ba_res->flags), 2080 le16_to_cpu(ba_res->txed), 2081 le16_to_cpu(ba_res->done)); 2082 2083 rcu_read_lock(); 2084 2085 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2086 /* 2087 * It's possible to get a BA response after invalidating the rcu 2088 * (rcu is invalidated in order to prevent new Tx from being 2089 * sent, but there may be some frames already in-flight). 2090 * In this case we just want to reclaim, and could skip all the 2091 * sta-dependent stuff since it's in the middle of being removed 2092 * anyways. 2093 */ 2094 2095 /* Free per TID */ 2096 for (i = 0; i < tfd_cnt; i++) { 2097 struct iwl_compressed_ba_tfd *ba_tfd = &ba_res->tfd[i]; 2098 2099 tid = ba_tfd->tid; 2100 if (tid == IWL_MGMT_TID) 2101 tid = IWL_MAX_TID_COUNT; 2102 2103 if (mvmsta) 2104 mvmsta->tid_data[i].lq_color = lq_color; 2105 2106 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 2107 (int)(le16_to_cpu(ba_tfd->q_num)), 2108 le16_to_cpu(ba_tfd->tfd_index), 2109 &ba_info, 2110 ba_res->tx_rate, false); 2111 } 2112 2113 if (mvmsta) 2114 iwl_mvm_tx_airtime(mvm, mvmsta, 2115 le32_to_cpu(ba_res->wireless_time)); 2116 2117 rcu_read_unlock(); 2118 return; 2119 } 2120 2121 ba_notif = (void *)pkt->data; 2122 sta_id = ba_notif->sta_id; 2123 tid = ba_notif->tid; 2124 /* "flow" corresponds to Tx queue */ 2125 txq = le16_to_cpu(ba_notif->scd_flow); 2126 /* "ssn" is start of block-ack Tx window, corresponds to index 2127 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2128 index = le16_to_cpu(ba_notif->scd_ssn); 2129 2130 rcu_read_lock(); 2131 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2132 if (IWL_FW_CHECK(mvm, !mvmsta, 2133 "invalid STA ID %d in BA notif\n", 2134 sta_id)) { 2135 rcu_read_unlock(); 2136 return; 2137 } 2138 2139 tid_data = &mvmsta->tid_data[tid]; 2140 2141 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2142 ba_info.status.ampdu_len = ba_notif->txed; 2143 ba_info.status.tx_time = tid_data->tx_time; 2144 ba_info.status.status_driver_data[0] = 2145 (void *)(uintptr_t)ba_notif->reduced_txp; 2146 2147 rcu_read_unlock(); 2148 2149 IWL_DEBUG_TX_REPLY(mvm, 2150 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2151 ba_notif->sta_addr, ba_notif->sta_id); 2152 2153 IWL_DEBUG_TX_REPLY(mvm, 2154 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2155 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2156 le64_to_cpu(ba_notif->bitmap), txq, index, 2157 ba_notif->txed, ba_notif->txed_2_done); 2158 2159 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2160 ba_notif->reduced_txp); 2161 2162 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2163 tid_data->rate_n_flags, false); 2164 } 2165 2166 /* 2167 * Note that there are transports that buffer frames before they reach 2168 * the firmware. This means that after flush_tx_path is called, the 2169 * queue might not be empty. The race-free way to handle this is to: 2170 * 1) set the station as draining 2171 * 2) flush the Tx path 2172 * 3) wait for the transport queues to be empty 2173 */ 2174 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2175 { 2176 int ret; 2177 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2178 .queues_ctl = cpu_to_le32(tfd_msk), 2179 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2180 }; 2181 2182 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2183 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2184 sizeof(flush_cmd), &flush_cmd); 2185 if (ret) 2186 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2187 return ret; 2188 } 2189 2190 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2191 { 2192 int ret; 2193 struct iwl_tx_path_flush_cmd_rsp *rsp; 2194 struct iwl_tx_path_flush_cmd flush_cmd = { 2195 .sta_id = cpu_to_le32(sta_id), 2196 .tid_mask = cpu_to_le16(tids), 2197 }; 2198 2199 struct iwl_host_cmd cmd = { 2200 .id = TXPATH_FLUSH, 2201 .len = { sizeof(flush_cmd), }, 2202 .data = { &flush_cmd, }, 2203 }; 2204 2205 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2206 2207 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2208 cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL; 2209 2210 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2211 sta_id, tids); 2212 2213 ret = iwl_mvm_send_cmd(mvm, &cmd); 2214 2215 if (ret) { 2216 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2217 return ret; 2218 } 2219 2220 if (cmd.flags & CMD_WANT_SKB) { 2221 int i; 2222 int num_flushed_queues; 2223 2224 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2225 ret = -EIO; 2226 goto free_rsp; 2227 } 2228 2229 rsp = (void *)cmd.resp_pkt->data; 2230 2231 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2232 "sta_id %d != rsp_sta_id %d", 2233 sta_id, le16_to_cpu(rsp->sta_id))) { 2234 ret = -EIO; 2235 goto free_rsp; 2236 } 2237 2238 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2239 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2240 "num_flushed_queues %d", num_flushed_queues)) { 2241 ret = -EIO; 2242 goto free_rsp; 2243 } 2244 2245 for (i = 0; i < num_flushed_queues; i++) { 2246 struct ieee80211_tx_info tx_info = {}; 2247 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2248 int tid = le16_to_cpu(queue_info->tid); 2249 int read_before = le16_to_cpu(queue_info->read_before_flush); 2250 int read_after = le16_to_cpu(queue_info->read_after_flush); 2251 int queue_num = le16_to_cpu(queue_info->queue_num); 2252 2253 if (tid == IWL_MGMT_TID) 2254 tid = IWL_MAX_TID_COUNT; 2255 2256 IWL_DEBUG_TX_QUEUES(mvm, 2257 "tid %d queue_id %d read-before %d read-after %d\n", 2258 tid, queue_num, read_before, read_after); 2259 2260 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2261 &tx_info, 0, true); 2262 } 2263 free_rsp: 2264 iwl_free_resp(&cmd); 2265 } 2266 return ret; 2267 } 2268 2269 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask) 2270 { 2271 if (iwl_mvm_has_new_tx_api(mvm)) 2272 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff); 2273 2274 return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask); 2275 } 2276