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 *tx_cmd, 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->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->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->tid_tspec = (control & 186 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 187 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 188 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 189 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 190 ssn); 191 } else { 192 if (ieee80211_is_data(fc)) 193 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 194 else 195 tx_cmd->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->tid_tspec < IWL_MAX_TID_COUNT) 205 ac = tid_to_mac80211_ac[tx_cmd->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->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 215 else if (ieee80211_is_action(fc)) 216 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 217 else 218 tx_cmd->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->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 226 } else { 227 tx_cmd->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->tx_flags = cpu_to_le32(tx_flags); 240 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 241 tx_cmd->len = cpu_to_le16((u16)skb->len); 242 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 243 tx_cmd->sta_id = sta_id; 244 245 tx_cmd->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 (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) { 287 if (!is_cck) 288 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK; 289 else 290 rate_flags |= RATE_MCS_CCK_MSK; 291 } else if (is_cck) { 292 rate_flags |= RATE_MCS_CCK_MSK_V1; 293 } 294 295 return (u32)rate_plcp | rate_flags; 296 } 297 298 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm, 299 struct ieee80211_tx_info *info, 300 struct ieee80211_sta *sta, 301 __le16 fc) 302 { 303 struct ieee80211_tx_rate *rate = &info->control.rates[0]; 304 u32 result; 305 306 /* 307 * we only care about legacy/HT/VHT so far, so we can 308 * build in v1 and use iwl_new_rate_from_v1() 309 */ 310 311 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { 312 u8 mcs = ieee80211_rate_get_vht_mcs(rate); 313 u8 nss = ieee80211_rate_get_vht_nss(rate); 314 315 result = RATE_MCS_VHT_MSK_V1; 316 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK); 317 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK); 318 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 319 result |= RATE_MCS_SGI_MSK_V1; 320 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 321 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 322 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 323 result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1); 324 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 325 result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1); 326 327 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6) 328 result = iwl_new_rate_from_v1(result); 329 } else if (rate->flags & IEEE80211_TX_RC_MCS) { 330 result = RATE_MCS_HT_MSK_V1; 331 result |= u32_encode_bits(rate->idx, 332 RATE_HT_MCS_RATE_CODE_MSK_V1 | 333 RATE_HT_MCS_NSS_MSK_V1); 334 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 335 result |= RATE_MCS_SGI_MSK_V1; 336 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 337 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 338 if (info->flags & IEEE80211_TX_CTL_LDPC) 339 result |= RATE_MCS_LDPC_MSK_V1; 340 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC)) 341 result |= RATE_MCS_STBC_MSK; 342 343 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6) 344 result = iwl_new_rate_from_v1(result); 345 } else { 346 int rate_idx = info->control.rates[0].idx; 347 348 result = iwl_mvm_convert_rate_idx(mvm, info, rate_idx); 349 } 350 351 if (info->control.antennas) 352 result |= u32_encode_bits(info->control.antennas, 353 RATE_MCS_ANT_AB_MSK); 354 else 355 result |= iwl_mvm_get_tx_ant(mvm, info, sta, fc); 356 357 return result; 358 } 359 360 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 361 struct ieee80211_tx_info *info, 362 struct ieee80211_sta *sta, __le16 fc) 363 { 364 int rate_idx = -1; 365 366 if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { 367 /* info->control is only relevant for non HW rate control */ 368 369 /* HT rate doesn't make sense for a non data frame */ 370 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && 371 !ieee80211_is_data(fc), 372 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", 373 info->control.rates[0].flags, 374 info->control.rates[0].idx, 375 le16_to_cpu(fc), 376 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 377 378 rate_idx = info->control.rates[0].idx; 379 380 /* For non 2 GHZ band, remap mac80211 rate indices into driver 381 * indices. 382 */ 383 if (info->band != NL80211_BAND_2GHZ || 384 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE)) 385 rate_idx += IWL_FIRST_OFDM_RATE; 386 387 /* For 2.4 GHZ band, check that there is no need to remap */ 388 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 389 } 390 391 return iwl_mvm_convert_rate_idx(mvm, info, rate_idx); 392 } 393 394 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 395 struct ieee80211_tx_info *info, 396 struct ieee80211_sta *sta, __le16 fc) 397 { 398 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) 399 return iwl_mvm_get_inject_tx_rate(mvm, info, sta, fc); 400 401 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) | 402 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 403 } 404 405 /* 406 * Sets the fields in the Tx cmd that are rate related 407 */ 408 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 409 struct ieee80211_tx_info *info, 410 struct ieee80211_sta *sta, __le16 fc) 411 { 412 /* Set retry limit on RTS packets */ 413 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 414 415 /* Set retry limit on DATA packets and Probe Responses*/ 416 if (ieee80211_is_probe_resp(fc)) { 417 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 418 tx_cmd->rts_retry_limit = 419 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 420 } else if (ieee80211_is_back_req(fc)) { 421 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 422 } else { 423 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 424 } 425 426 /* 427 * for data packets, rate info comes from the table inside the fw. This 428 * table is controlled by LINK_QUALITY commands 429 */ 430 431 if (likely(ieee80211_is_data(fc) && sta && 432 !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) { 433 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 434 435 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 436 tx_cmd->initial_rate_index = 0; 437 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 438 return; 439 } 440 } else if (ieee80211_is_back_req(fc)) { 441 tx_cmd->tx_flags |= 442 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 443 } 444 445 /* Set the rate in the TX cmd */ 446 tx_cmd->rate_n_flags = 447 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 448 } 449 450 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 451 u8 *crypto_hdr) 452 { 453 struct ieee80211_key_conf *keyconf = info->control.hw_key; 454 u64 pn; 455 456 pn = atomic64_inc_return(&keyconf->tx_pn); 457 crypto_hdr[0] = pn; 458 crypto_hdr[2] = 0; 459 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 460 crypto_hdr[1] = pn >> 8; 461 crypto_hdr[4] = pn >> 16; 462 crypto_hdr[5] = pn >> 24; 463 crypto_hdr[6] = pn >> 32; 464 crypto_hdr[7] = pn >> 40; 465 } 466 467 /* 468 * Sets the fields in the Tx cmd that are crypto related 469 */ 470 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 471 struct ieee80211_tx_info *info, 472 struct iwl_tx_cmd *tx_cmd, 473 struct sk_buff *skb_frag, 474 int hdrlen) 475 { 476 struct ieee80211_key_conf *keyconf = info->control.hw_key; 477 u8 *crypto_hdr = skb_frag->data + hdrlen; 478 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 479 u64 pn; 480 481 switch (keyconf->cipher) { 482 case WLAN_CIPHER_SUITE_CCMP: 483 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 484 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 485 break; 486 487 case WLAN_CIPHER_SUITE_TKIP: 488 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 489 pn = atomic64_inc_return(&keyconf->tx_pn); 490 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 491 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 492 break; 493 494 case WLAN_CIPHER_SUITE_WEP104: 495 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 496 fallthrough; 497 case WLAN_CIPHER_SUITE_WEP40: 498 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 499 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 500 TX_CMD_SEC_WEP_KEY_IDX_MSK); 501 502 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 503 break; 504 case WLAN_CIPHER_SUITE_GCMP: 505 case WLAN_CIPHER_SUITE_GCMP_256: 506 type = TX_CMD_SEC_GCMP; 507 fallthrough; 508 case WLAN_CIPHER_SUITE_CCMP_256: 509 /* TODO: Taking the key from the table might introduce a race 510 * when PTK rekeying is done, having an old packets with a PN 511 * based on the old key but the message encrypted with a new 512 * one. 513 * Need to handle this. 514 */ 515 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 516 tx_cmd->key[0] = keyconf->hw_key_idx; 517 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 518 break; 519 default: 520 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 521 } 522 } 523 524 static bool iwl_mvm_use_host_rate(struct iwl_mvm *mvm, 525 struct iwl_mvm_sta *mvmsta, 526 struct ieee80211_hdr *hdr, 527 struct ieee80211_tx_info *info) 528 { 529 if (unlikely(!mvmsta)) 530 return true; 531 532 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) 533 return true; 534 535 if (likely(ieee80211_is_data(hdr->frame_control) && 536 mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED)) 537 return false; 538 539 /* 540 * Not a data frame, use host rate if on an old device that 541 * can't possibly be doing MLO (firmware may be selecting a 542 * bad rate), if we might be doing MLO we need to let FW pick 543 * (since we don't necesarily know the link), but FW rate 544 * selection was fixed. 545 */ 546 return mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ; 547 } 548 549 static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen, 550 const u8 *addr3_override) 551 { 552 struct ieee80211_hdr *out_hdr = cmd; 553 554 memcpy(cmd, hdr, hdrlen); 555 if (addr3_override) 556 memcpy(out_hdr->addr3, addr3_override, ETH_ALEN); 557 } 558 559 /* 560 * Allocates and sets the Tx cmd the driver data pointers in the skb 561 */ 562 static struct iwl_device_tx_cmd * 563 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 564 struct ieee80211_tx_info *info, int hdrlen, 565 struct ieee80211_sta *sta, u8 sta_id, 566 const u8 *addr3_override) 567 { 568 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 569 struct iwl_device_tx_cmd *dev_cmd; 570 struct iwl_tx_cmd *tx_cmd; 571 572 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 573 574 if (unlikely(!dev_cmd)) 575 return NULL; 576 577 dev_cmd->hdr.cmd = TX_CMD; 578 579 if (iwl_mvm_has_new_tx_api(mvm)) { 580 u32 rate_n_flags = 0; 581 u16 flags = 0; 582 struct iwl_mvm_sta *mvmsta = sta ? 583 iwl_mvm_sta_from_mac80211(sta) : NULL; 584 bool amsdu = false; 585 586 if (ieee80211_is_data_qos(hdr->frame_control)) { 587 u8 *qc = ieee80211_get_qos_ctl(hdr); 588 589 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 590 } 591 592 if (!info->control.hw_key) 593 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 594 595 /* 596 * For data and mgmt packets rate info comes from the fw (for 597 * new devices, older FW is somewhat broken for this). Only 598 * set rate/antenna for injected frames with fixed rate, or 599 * when no sta is given, or with older firmware. 600 */ 601 if (unlikely(iwl_mvm_use_host_rate(mvm, mvmsta, hdr, info))) { 602 flags |= IWL_TX_FLAGS_CMD_RATE; 603 rate_n_flags = 604 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 605 hdr->frame_control); 606 } else if (!ieee80211_is_data(hdr->frame_control) || 607 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 608 /* These are important frames */ 609 flags |= IWL_TX_FLAGS_HIGH_PRI; 610 } 611 612 if (mvm->trans->trans_cfg->device_family >= 613 IWL_DEVICE_FAMILY_AX210) { 614 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 615 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, 616 info, amsdu); 617 618 cmd->offload_assist = cpu_to_le32(offload_assist); 619 620 /* Total # bytes to be transmitted */ 621 cmd->len = cpu_to_le16((u16)skb->len); 622 623 /* Copy MAC header from skb into command buffer */ 624 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override); 625 626 cmd->flags = cpu_to_le16(flags); 627 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 628 } else { 629 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 630 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb, 631 info, amsdu); 632 633 cmd->offload_assist = cpu_to_le16(offload_assist); 634 635 /* Total # bytes to be transmitted */ 636 cmd->len = cpu_to_le16((u16)skb->len); 637 638 /* Copy MAC header from skb into command buffer */ 639 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override); 640 641 cmd->flags = cpu_to_le32(flags); 642 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 643 } 644 goto out; 645 } 646 647 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 648 649 if (info->control.hw_key) 650 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 651 652 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 653 654 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 655 656 /* Copy MAC header from skb into command buffer */ 657 iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override); 658 659 out: 660 return dev_cmd; 661 } 662 663 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 664 struct iwl_device_tx_cmd *cmd) 665 { 666 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 667 668 memset(&skb_info->status, 0, sizeof(skb_info->status)); 669 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 670 671 skb_info->driver_data[1] = cmd; 672 } 673 674 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 675 struct iwl_mvm_vif_link_info *link, 676 struct ieee80211_tx_info *info, 677 struct sk_buff *skb) 678 { 679 struct ieee80211_hdr *hdr = (void *)skb->data; 680 __le16 fc = hdr->frame_control; 681 682 switch (info->control.vif->type) { 683 case NL80211_IFTYPE_AP: 684 case NL80211_IFTYPE_ADHOC: 685 /* 686 * Non-bufferable frames use the broadcast station, thus they 687 * use the probe queue. 688 * Also take care of the case where we send a deauth to a 689 * station that we don't have, or similarly an association 690 * response (with non-success status) for a station we can't 691 * accept. 692 * Also, disassociate frames might happen, particular with 693 * reason 7 ("Class 3 frame received from nonassociated STA"). 694 */ 695 if (ieee80211_is_mgmt(fc) && 696 (!ieee80211_is_bufferable_mmpdu(skb) || 697 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 698 return link->mgmt_queue; 699 700 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 701 is_multicast_ether_addr(hdr->addr1)) 702 return link->cab_queue; 703 704 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 705 "fc=0x%02x", le16_to_cpu(fc)); 706 return link->mgmt_queue; 707 case NL80211_IFTYPE_P2P_DEVICE: 708 if (ieee80211_is_mgmt(fc)) 709 return mvm->p2p_dev_queue; 710 711 WARN_ON_ONCE(1); 712 return mvm->p2p_dev_queue; 713 default: 714 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 715 return -1; 716 } 717 } 718 719 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 720 struct sk_buff *skb) 721 { 722 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 723 struct iwl_mvm_vif *mvmvif = 724 iwl_mvm_vif_from_mac80211(info->control.vif); 725 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 726 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 727 struct iwl_probe_resp_data *resp_data; 728 const u8 *ie; 729 u8 *pos; 730 u8 match[] = { 731 (WLAN_OUI_WFA >> 16) & 0xff, 732 (WLAN_OUI_WFA >> 8) & 0xff, 733 WLAN_OUI_WFA & 0xff, 734 WLAN_OUI_TYPE_WFA_P2P, 735 }; 736 737 rcu_read_lock(); 738 739 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data); 740 if (!resp_data) 741 goto out; 742 743 if (!resp_data->notif.noa_active) 744 goto out; 745 746 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 747 mgmt->u.probe_resp.variable, 748 skb->len - base_len, 749 match, 4, 2); 750 if (!ie) { 751 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 752 goto out; 753 } 754 755 if (skb_tailroom(skb) < resp_data->noa_len) { 756 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 757 IWL_ERR(mvm, 758 "Failed to reallocate probe resp\n"); 759 goto out; 760 } 761 } 762 763 pos = skb_put(skb, resp_data->noa_len); 764 765 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 766 /* Set length of IE body (not including ID and length itself) */ 767 *pos++ = resp_data->noa_len - 2; 768 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 769 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 770 *pos++ = WLAN_OUI_WFA & 0xff; 771 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 772 773 memcpy(pos, &resp_data->notif.noa_attr, 774 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 775 776 out: 777 rcu_read_unlock(); 778 } 779 780 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 781 { 782 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 783 struct ieee80211_tx_info info; 784 struct iwl_device_tx_cmd *dev_cmd; 785 u8 sta_id; 786 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 787 __le16 fc = hdr->frame_control; 788 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 789 IEEE80211_TX_CTL_TX_OFFCHAN; 790 int queue = -1; 791 792 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 793 return -1; 794 795 memcpy(&info, skb->cb, sizeof(info)); 796 797 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 798 return -1; 799 800 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 801 return -1; 802 803 if (info.control.vif) { 804 struct iwl_mvm_vif *mvmvif = 805 iwl_mvm_vif_from_mac80211(info.control.vif); 806 bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm); 807 808 if ((info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE && 809 p2p_aux) || 810 (info.control.vif->type == NL80211_IFTYPE_STATION && 811 offchannel)) { 812 /* 813 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 814 * that can be used in 2 different types of vifs, P2P 815 * Device and STATION. 816 * P2P Device uses the offchannel queue. 817 * STATION (HS2.0) uses the auxiliary context of the FW, 818 * and hence needs to be sent on the aux queue. 819 * If P2P_DEV_OVER_AUX is supported (p2p_aux = true) 820 * also P2P Device uses the aux queue. 821 */ 822 sta_id = mvm->aux_sta.sta_id; 823 queue = mvm->aux_queue; 824 if (WARN_ON(queue == IWL_MVM_INVALID_QUEUE)) 825 return -1; 826 } else if (info.control.vif->type == 827 NL80211_IFTYPE_P2P_DEVICE || 828 info.control.vif->type == NL80211_IFTYPE_AP || 829 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 830 u32 link_id = u32_get_bits(info.control.flags, 831 IEEE80211_TX_CTRL_MLO_LINK); 832 struct iwl_mvm_vif_link_info *link; 833 834 if (link_id == IEEE80211_LINK_UNSPECIFIED) { 835 if (info.control.vif->active_links) 836 link_id = ffs(info.control.vif->active_links) - 1; 837 else 838 link_id = 0; 839 } 840 841 link = mvmvif->link[link_id]; 842 if (WARN_ON(!link)) 843 return -1; 844 845 if (!ieee80211_is_data(hdr->frame_control)) 846 sta_id = link->bcast_sta.sta_id; 847 else 848 sta_id = link->mcast_sta.sta_id; 849 850 queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info, 851 skb); 852 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 853 queue = mvm->snif_queue; 854 sta_id = mvm->snif_sta.sta_id; 855 } 856 } 857 858 if (queue < 0) { 859 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 860 return -1; 861 } 862 863 if (unlikely(ieee80211_is_probe_resp(fc))) 864 iwl_mvm_probe_resp_set_noa(mvm, skb); 865 866 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 867 868 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id, 869 NULL); 870 if (!dev_cmd) 871 return -1; 872 873 /* From now on, we cannot access info->control */ 874 iwl_mvm_skb_prepare_status(skb, dev_cmd); 875 876 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 877 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 878 return -1; 879 } 880 881 return 0; 882 } 883 884 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 885 struct ieee80211_sta *sta, unsigned int tid) 886 { 887 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 888 u8 ac = tid_to_mac80211_ac[tid]; 889 enum nl80211_band band; 890 unsigned int txf; 891 unsigned int val; 892 int lmac; 893 894 /* For HE redirect to trigger based fifos */ 895 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 896 ac += 4; 897 898 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 899 900 /* 901 * Don't send an AMSDU that will be longer than the TXF. 902 * Add a security margin of 256 for the TX command + headers. 903 * We also want to have the start of the next packet inside the 904 * fifo to be able to send bursts. 905 */ 906 val = mvmsta->max_amsdu_len; 907 908 if (hweight16(sta->valid_links) <= 1) { 909 if (sta->valid_links) { 910 struct ieee80211_bss_conf *link_conf; 911 unsigned int link = ffs(sta->valid_links) - 1; 912 913 rcu_read_lock(); 914 link_conf = rcu_dereference(mvmsta->vif->link_conf[link]); 915 if (WARN_ON(!link_conf)) 916 band = NL80211_BAND_2GHZ; 917 else 918 band = link_conf->chanreq.oper.chan->band; 919 rcu_read_unlock(); 920 } else { 921 band = mvmsta->vif->bss_conf.chanreq.oper.chan->band; 922 } 923 924 lmac = iwl_mvm_get_lmac_id(mvm, band); 925 } else if (fw_has_capa(&mvm->fw->ucode_capa, 926 IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) { 927 /* for real MLO restrict to both LMACs if they exist */ 928 lmac = IWL_LMAC_5G_INDEX; 929 val = min_t(unsigned int, val, 930 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 931 lmac = IWL_LMAC_24G_INDEX; 932 } else { 933 lmac = IWL_LMAC_24G_INDEX; 934 } 935 936 return min_t(unsigned int, val, 937 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 938 } 939 940 #ifdef CONFIG_INET 941 942 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 943 struct ieee80211_tx_info *info, 944 struct ieee80211_sta *sta, 945 struct sk_buff_head *mpdus_skb) 946 { 947 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 948 struct ieee80211_hdr *hdr = (void *)skb->data; 949 unsigned int mss = skb_shinfo(skb)->gso_size; 950 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 951 u16 snap_ip_tcp, pad; 952 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 953 u8 tid; 954 955 snap_ip_tcp = 8 + skb_network_header_len(skb) + tcp_hdrlen(skb); 956 957 if (!mvmsta->max_amsdu_len || 958 !ieee80211_is_data_qos(hdr->frame_control) || 959 !mvmsta->amsdu_enabled) 960 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 961 962 /* 963 * Do not build AMSDU for IPv6 with extension headers. 964 * ask stack to segment and checkum the generated MPDUs for us. 965 */ 966 if (skb->protocol == htons(ETH_P_IPV6) && 967 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 968 IPPROTO_TCP) { 969 netdev_flags &= ~NETIF_F_CSUM_MASK; 970 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 971 } 972 973 tid = ieee80211_get_tid(hdr); 974 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 975 return -EINVAL; 976 977 /* 978 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 979 * during an BA session. 980 */ 981 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 982 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 983 !(mvmsta->amsdu_enabled & BIT(tid))) 984 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 985 986 /* 987 * Take the min of ieee80211 station and mvm station 988 */ 989 max_amsdu_len = 990 min_t(unsigned int, sta->cur->max_amsdu_len, 991 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 992 993 /* 994 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 995 * supported. This is a spec requirement (IEEE 802.11-2015 996 * section 8.7.3 NOTE 3). 997 */ 998 if (info->flags & IEEE80211_TX_CTL_AMPDU && 999 !sta->deflink.vht_cap.vht_supported) 1000 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 1001 1002 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 1003 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 1004 pad = (4 - subf_len) & 0x3; 1005 1006 /* 1007 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 1008 * N * subf_len + (N - 1) * pad. 1009 */ 1010 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 1011 1012 if (sta->max_amsdu_subframes && 1013 num_subframes > sta->max_amsdu_subframes) 1014 num_subframes = sta->max_amsdu_subframes; 1015 1016 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1017 tcp_hdrlen(skb) + skb->data_len; 1018 1019 /* 1020 * Make sure we have enough TBs for the A-MSDU: 1021 * 2 for each subframe 1022 * 1 more for each fragment 1023 * 1 more for the potential data in the header 1024 */ 1025 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 1026 mvm->trans->max_skb_frags) 1027 num_subframes = 1; 1028 1029 if (num_subframes > 1) 1030 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1031 1032 /* This skb fits in one single A-MSDU */ 1033 if (num_subframes * mss >= tcp_payload_len) { 1034 __skb_queue_tail(mpdus_skb, skb); 1035 return 0; 1036 } 1037 1038 /* 1039 * Trick the segmentation function to make it 1040 * create SKBs that can fit into one A-MSDU. 1041 */ 1042 return iwl_tx_tso_segment(skb, num_subframes, netdev_flags, mpdus_skb); 1043 } 1044 #else /* CONFIG_INET */ 1045 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 1046 struct ieee80211_tx_info *info, 1047 struct ieee80211_sta *sta, 1048 struct sk_buff_head *mpdus_skb) 1049 { 1050 /* Impossible to get TSO with CONFIG_INET */ 1051 WARN_ON(1); 1052 1053 return -1; 1054 } 1055 #endif 1056 1057 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1058 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1059 { 1060 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1061 unsigned long now = jiffies; 1062 int tid; 1063 1064 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1065 return false; 1066 1067 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1068 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1069 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1070 return true; 1071 } 1072 1073 return false; 1074 } 1075 1076 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1077 struct iwl_mvm_sta *mvmsta, 1078 int airtime) 1079 { 1080 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1081 struct iwl_mvm_tcm_mac *mdata; 1082 1083 if (mac >= NUM_MAC_INDEX_DRIVER) 1084 return; 1085 1086 mdata = &mvm->tcm.data[mac]; 1087 1088 if (mvm->tcm.paused) 1089 return; 1090 1091 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1092 schedule_delayed_work(&mvm->tcm.work, 0); 1093 1094 mdata->tx.airtime += airtime; 1095 } 1096 1097 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1098 struct iwl_mvm_sta *mvmsta, int tid) 1099 { 1100 u32 ac = tid_to_mac80211_ac[tid]; 1101 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1102 struct iwl_mvm_tcm_mac *mdata; 1103 1104 if (mac >= NUM_MAC_INDEX_DRIVER) 1105 return -EINVAL; 1106 1107 mdata = &mvm->tcm.data[mac]; 1108 1109 mdata->tx.pkts[ac]++; 1110 1111 return 0; 1112 } 1113 1114 /* 1115 * Sets the fields in the Tx cmd that are crypto related. 1116 * 1117 * This function must be called with BHs disabled. 1118 */ 1119 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1120 struct ieee80211_tx_info *info, 1121 struct ieee80211_sta *sta, 1122 const u8 *addr3_override) 1123 { 1124 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1125 struct iwl_mvm_sta *mvmsta; 1126 struct iwl_device_tx_cmd *dev_cmd; 1127 __le16 fc; 1128 u16 seq_number = 0; 1129 u8 tid = IWL_MAX_TID_COUNT; 1130 u16 txq_id; 1131 bool is_ampdu = false; 1132 int hdrlen; 1133 1134 if (WARN_ON_ONCE(!sta)) 1135 return -1; 1136 1137 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1138 fc = hdr->frame_control; 1139 hdrlen = ieee80211_hdrlen(fc); 1140 1141 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1142 return -1; 1143 1144 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_INVALID_STA)) 1145 return -1; 1146 1147 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he) 1148 return -1; 1149 1150 if (unlikely(ieee80211_is_probe_resp(fc))) 1151 iwl_mvm_probe_resp_set_noa(mvm, skb); 1152 1153 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1154 sta, mvmsta->deflink.sta_id, 1155 addr3_override); 1156 if (!dev_cmd) 1157 goto drop; 1158 1159 /* 1160 * we handle that entirely ourselves -- for uAPSD the firmware 1161 * will always send a notification, and for PS-Poll responses 1162 * we'll notify mac80211 when getting frame status 1163 */ 1164 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1165 1166 spin_lock(&mvmsta->lock); 1167 1168 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1169 * the conditions of !ieee80211_is_qos_nullfunc(fc) and 1170 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID 1171 */ 1172 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1173 tid = ieee80211_get_tid(hdr); 1174 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1175 goto drop_unlock_sta; 1176 1177 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1178 if (WARN_ONCE(is_ampdu && 1179 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1180 "Invalid internal agg state %d for TID %d", 1181 mvmsta->tid_data[tid].state, tid)) 1182 goto drop_unlock_sta; 1183 1184 seq_number = mvmsta->tid_data[tid].seq_number; 1185 seq_number &= IEEE80211_SCTL_SEQ; 1186 1187 if (!iwl_mvm_has_new_tx_api(mvm)) { 1188 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1189 1190 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1191 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1192 /* update the tx_cmd hdr as it was already copied */ 1193 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1194 } 1195 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) && 1196 !ieee80211_is_nullfunc(fc)) { 1197 tid = IWL_TID_NON_QOS; 1198 } 1199 1200 txq_id = mvmsta->tid_data[tid].txq_id; 1201 1202 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1203 1204 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1205 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1206 spin_unlock(&mvmsta->lock); 1207 return -1; 1208 } 1209 1210 if (!iwl_mvm_has_new_tx_api(mvm)) { 1211 /* Keep track of the time of the last frame for this RA/TID */ 1212 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1213 1214 /* 1215 * If we have timed-out TIDs - schedule the worker that will 1216 * reconfig the queues and update them 1217 * 1218 * Note that the no lock is taken here in order to not serialize 1219 * the TX flow. This isn't dangerous because scheduling 1220 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1221 * schedule it due to some race condition then next TX we get 1222 * here we will. 1223 */ 1224 if (unlikely(mvm->queue_info[txq_id].status == 1225 IWL_MVM_QUEUE_SHARED && 1226 iwl_mvm_txq_should_update(mvm, txq_id))) 1227 schedule_work(&mvm->add_stream_wk); 1228 } 1229 1230 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1231 mvmsta->deflink.sta_id, tid, txq_id, 1232 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1233 1234 /* From now on, we cannot access info->control */ 1235 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1236 1237 /* 1238 * The IV is introduced by the HW for new tx api, and it is not present 1239 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the 1240 * IV for those devices. 1241 */ 1242 if (ieee80211_is_data(fc)) 1243 iwl_mvm_mei_tx_copy_to_csme(mvm, skb, 1244 info->control.hw_key && 1245 !iwl_mvm_has_new_tx_api(mvm) ? 1246 info->control.hw_key->iv_len : 0); 1247 1248 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1249 goto drop_unlock_sta; 1250 1251 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1252 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1253 1254 spin_unlock(&mvmsta->lock); 1255 1256 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1257 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1258 goto drop; 1259 1260 return 0; 1261 1262 drop_unlock_sta: 1263 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1264 spin_unlock(&mvmsta->lock); 1265 drop: 1266 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id, 1267 tid); 1268 return -1; 1269 } 1270 1271 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1272 struct ieee80211_sta *sta) 1273 { 1274 struct iwl_mvm_sta *mvmsta; 1275 struct ieee80211_tx_info info; 1276 struct sk_buff_head mpdus_skbs; 1277 struct ieee80211_vif *vif; 1278 unsigned int payload_len; 1279 int ret; 1280 struct sk_buff *orig_skb = skb; 1281 const u8 *addr3; 1282 1283 if (WARN_ON_ONCE(!sta)) 1284 return -1; 1285 1286 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1287 1288 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_INVALID_STA)) 1289 return -1; 1290 1291 memcpy(&info, skb->cb, sizeof(info)); 1292 1293 if (!skb_is_gso(skb)) 1294 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL); 1295 1296 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1297 tcp_hdrlen(skb) + skb->data_len; 1298 1299 if (payload_len <= skb_shinfo(skb)->gso_size) 1300 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL); 1301 1302 __skb_queue_head_init(&mpdus_skbs); 1303 1304 vif = info.control.vif; 1305 if (!vif) 1306 return -1; 1307 1308 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1309 if (ret) 1310 return ret; 1311 1312 WARN_ON(skb_queue_empty(&mpdus_skbs)); 1313 1314 /* 1315 * As described in IEEE sta 802.11-2020, table 9-30 (Address 1316 * field contents), A-MSDU address 3 should contain the BSSID 1317 * address. 1318 * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it 1319 * in the command header. We need to preserve the original 1320 * address 3 in the skb header to correctly create all the 1321 * A-MSDU subframe headers from it. 1322 */ 1323 switch (vif->type) { 1324 case NL80211_IFTYPE_STATION: 1325 addr3 = vif->cfg.ap_addr; 1326 break; 1327 case NL80211_IFTYPE_AP: 1328 addr3 = vif->addr; 1329 break; 1330 default: 1331 addr3 = NULL; 1332 break; 1333 } 1334 1335 while (!skb_queue_empty(&mpdus_skbs)) { 1336 struct ieee80211_hdr *hdr; 1337 bool amsdu; 1338 1339 skb = __skb_dequeue(&mpdus_skbs); 1340 hdr = (void *)skb->data; 1341 amsdu = ieee80211_is_data_qos(hdr->frame_control) && 1342 (*ieee80211_get_qos_ctl(hdr) & 1343 IEEE80211_QOS_CTL_A_MSDU_PRESENT); 1344 1345 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta, 1346 amsdu ? addr3 : NULL); 1347 if (ret) { 1348 /* Free skbs created as part of TSO logic that have not yet been dequeued */ 1349 __skb_queue_purge(&mpdus_skbs); 1350 /* skb here is not necessarily same as skb that entered this method, 1351 * so free it explicitly. 1352 */ 1353 if (skb == orig_skb) 1354 ieee80211_free_txskb(mvm->hw, skb); 1355 else 1356 kfree_skb(skb); 1357 /* there was error, but we consumed skb one way or another, so return 0 */ 1358 return 0; 1359 } 1360 } 1361 1362 return 0; 1363 } 1364 1365 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1366 struct ieee80211_sta *sta, u8 tid) 1367 { 1368 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1369 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1370 struct ieee80211_vif *vif = mvmsta->vif; 1371 u16 normalized_ssn; 1372 1373 lockdep_assert_held(&mvmsta->lock); 1374 1375 if (tid_data->state == IWL_AGG_ON && 1376 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1377 /* 1378 * Now that this aggregation or DQA queue is empty tell 1379 * mac80211 so it knows we no longer have frames buffered for 1380 * the station on this TID (for the TIM bitmap calculation.) 1381 */ 1382 ieee80211_sta_set_buffered(sta, tid, false); 1383 } 1384 1385 /* 1386 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1387 * to align the wrap around of ssn so we compare relevant values. 1388 */ 1389 normalized_ssn = tid_data->ssn; 1390 if (mvm->trans->trans_cfg->gen2) 1391 normalized_ssn &= 0xff; 1392 1393 if (normalized_ssn != tid_data->next_reclaimed) 1394 return; 1395 1396 switch (tid_data->state) { 1397 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1398 IWL_DEBUG_TX_QUEUES(mvm, 1399 "Can continue addBA flow ssn = next_recl = %d\n", 1400 tid_data->next_reclaimed); 1401 tid_data->state = IWL_AGG_STARTING; 1402 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1403 break; 1404 default: 1405 break; 1406 } 1407 } 1408 1409 #ifdef CONFIG_IWLWIFI_DEBUG 1410 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1411 { 1412 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1413 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1414 1415 switch (status & TX_STATUS_MSK) { 1416 case TX_STATUS_SUCCESS: 1417 return "SUCCESS"; 1418 TX_STATUS_POSTPONE(DELAY); 1419 TX_STATUS_POSTPONE(FEW_BYTES); 1420 TX_STATUS_POSTPONE(BT_PRIO); 1421 TX_STATUS_POSTPONE(QUIET_PERIOD); 1422 TX_STATUS_POSTPONE(CALC_TTAK); 1423 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1424 TX_STATUS_FAIL(SHORT_LIMIT); 1425 TX_STATUS_FAIL(LONG_LIMIT); 1426 TX_STATUS_FAIL(UNDERRUN); 1427 TX_STATUS_FAIL(DRAIN_FLOW); 1428 TX_STATUS_FAIL(RFKILL_FLUSH); 1429 TX_STATUS_FAIL(LIFE_EXPIRE); 1430 TX_STATUS_FAIL(DEST_PS); 1431 TX_STATUS_FAIL(HOST_ABORTED); 1432 TX_STATUS_FAIL(BT_RETRY); 1433 TX_STATUS_FAIL(STA_INVALID); 1434 TX_STATUS_FAIL(FRAG_DROPPED); 1435 TX_STATUS_FAIL(TID_DISABLE); 1436 TX_STATUS_FAIL(FIFO_FLUSHED); 1437 TX_STATUS_FAIL(SMALL_CF_POLL); 1438 TX_STATUS_FAIL(FW_DROP); 1439 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1440 } 1441 1442 return "UNKNOWN"; 1443 1444 #undef TX_STATUS_FAIL 1445 #undef TX_STATUS_POSTPONE 1446 } 1447 #endif /* CONFIG_IWLWIFI_DEBUG */ 1448 1449 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1450 { 1451 switch (chan_width) { 1452 case RATE_MCS_CHAN_WIDTH_20: 1453 return 0; 1454 case RATE_MCS_CHAN_WIDTH_40: 1455 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1456 case RATE_MCS_CHAN_WIDTH_80: 1457 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1458 case RATE_MCS_CHAN_WIDTH_160: 1459 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1460 default: 1461 return 0; 1462 } 1463 } 1464 1465 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1466 enum nl80211_band band, 1467 struct ieee80211_tx_rate *r) 1468 { 1469 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1470 u32 rate = format == RATE_MCS_HT_MSK ? 1471 RATE_HT_MCS_INDEX(rate_n_flags) : 1472 rate_n_flags & RATE_MCS_CODE_MSK; 1473 1474 r->flags |= 1475 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1476 RATE_MCS_CHAN_WIDTH_MSK); 1477 1478 if (rate_n_flags & RATE_MCS_SGI_MSK) 1479 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1480 if (format == RATE_MCS_HT_MSK) { 1481 r->flags |= IEEE80211_TX_RC_MCS; 1482 r->idx = rate; 1483 } else if (format == RATE_MCS_VHT_MSK) { 1484 ieee80211_rate_set_vht(r, rate, 1485 FIELD_GET(RATE_MCS_NSS_MSK, 1486 rate_n_flags) + 1); 1487 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1488 } else if (format == RATE_MCS_HE_MSK) { 1489 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1490 * but it only matters for radiotap */ 1491 r->idx = 0; 1492 } else { 1493 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1494 band); 1495 } 1496 } 1497 1498 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags, 1499 enum nl80211_band band, 1500 struct ieee80211_tx_rate *r) 1501 { 1502 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1503 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1504 1505 r->flags |= 1506 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1507 RATE_MCS_CHAN_WIDTH_MSK_V1); 1508 1509 if (rate_n_flags & RATE_MCS_SGI_MSK_V1) 1510 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1511 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 1512 r->flags |= IEEE80211_TX_RC_MCS; 1513 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 1514 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 1515 ieee80211_rate_set_vht( 1516 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1517 FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1); 1518 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1519 } else { 1520 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1521 band); 1522 } 1523 } 1524 1525 /* 1526 * translate ucode response to mac80211 tx status control values 1527 */ 1528 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw, 1529 u32 rate_n_flags, 1530 struct ieee80211_tx_info *info) 1531 { 1532 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1533 1534 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP, 1535 TX_CMD, 0) <= 6) 1536 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1537 1538 info->status.antenna = 1539 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1540 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, 1541 info->band, r); 1542 } 1543 1544 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1545 u32 status, __le16 frame_control) 1546 { 1547 struct iwl_fw_dbg_trigger_tlv *trig; 1548 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1549 int i; 1550 1551 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1552 enum iwl_fw_ini_time_point tp = 1553 IWL_FW_INI_TIME_POINT_TX_FAILED; 1554 1555 if (ieee80211_is_action(frame_control)) 1556 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1557 1558 iwl_dbg_tlv_time_point(&mvm->fwrt, 1559 tp, NULL); 1560 return; 1561 } 1562 1563 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1564 FW_DBG_TRIGGER_TX_STATUS); 1565 if (!trig) 1566 return; 1567 1568 status_trig = (void *)trig->data; 1569 1570 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1571 /* don't collect on status 0 */ 1572 if (!status_trig->statuses[i].status) 1573 break; 1574 1575 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1576 continue; 1577 1578 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1579 "Tx status %d was received", 1580 status & TX_STATUS_MSK); 1581 break; 1582 } 1583 } 1584 1585 /* 1586 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1587 * @tx_resp: the Tx response from the fw (agg or non-agg) 1588 * 1589 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1590 * it can't know that everything will go well until the end of the AMPDU, it 1591 * can't know in advance the number of MPDUs that will be sent in the current 1592 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1593 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1594 * of the batch. This is why the SSN of the SCD is written at the end of the 1595 * whole struct at a variable offset. This function knows how to cope with the 1596 * variable offset and returns the SSN of the SCD. 1597 * 1598 * For 22000-series and lower, this is just 12 bits. For later, 16 bits. 1599 */ 1600 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1601 struct iwl_tx_resp *tx_resp) 1602 { 1603 u32 val = le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1604 tx_resp->frame_count); 1605 1606 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 1607 return val & 0xFFFF; 1608 return val & 0xFFF; 1609 } 1610 1611 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1612 struct iwl_rx_packet *pkt) 1613 { 1614 struct ieee80211_sta *sta; 1615 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1616 int txq_id = SEQ_TO_QUEUE(sequence); 1617 /* struct iwl_tx_resp_v3 is almost the same */ 1618 struct iwl_tx_resp *tx_resp = (void *)pkt->data; 1619 int sta_id = IWL_TX_RES_GET_RA(tx_resp->ra_tid); 1620 int tid = IWL_TX_RES_GET_TID(tx_resp->ra_tid); 1621 struct agg_tx_status *agg_status = 1622 iwl_mvm_get_agg_status(mvm, tx_resp); 1623 u32 status = le16_to_cpu(agg_status->status); 1624 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1625 struct sk_buff_head skbs; 1626 u8 skb_freed = 0; 1627 u8 lq_color; 1628 u16 next_reclaimed, seq_ctl; 1629 bool is_ndp = false; 1630 1631 __skb_queue_head_init(&skbs); 1632 1633 if (iwl_mvm_has_new_tx_api(mvm)) 1634 txq_id = le16_to_cpu(tx_resp->tx_queue); 1635 1636 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1637 1638 /* we can free until ssn % q.n_bd not inclusive */ 1639 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false); 1640 1641 while (!skb_queue_empty(&skbs)) { 1642 struct sk_buff *skb = __skb_dequeue(&skbs); 1643 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1644 struct ieee80211_hdr *hdr = (void *)skb->data; 1645 bool flushed = false; 1646 1647 skb_freed++; 1648 1649 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1650 1651 memset(&info->status, 0, sizeof(info->status)); 1652 info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED); 1653 1654 /* inform mac80211 about what happened with the frame */ 1655 switch (status & TX_STATUS_MSK) { 1656 case TX_STATUS_SUCCESS: 1657 case TX_STATUS_DIRECT_DONE: 1658 info->flags |= IEEE80211_TX_STAT_ACK; 1659 break; 1660 case TX_STATUS_FAIL_FIFO_FLUSHED: 1661 case TX_STATUS_FAIL_DRAIN_FLOW: 1662 flushed = true; 1663 break; 1664 case TX_STATUS_FAIL_DEST_PS: 1665 /* the FW should have stopped the queue and not 1666 * return this status 1667 */ 1668 IWL_ERR_LIMIT(mvm, 1669 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1670 status, le16_to_cpu(hdr->frame_control)); 1671 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1672 break; 1673 default: 1674 break; 1675 } 1676 1677 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1678 ieee80211_is_mgmt(hdr->frame_control)) 1679 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1680 1681 /* 1682 * If we are freeing multiple frames, mark all the frames 1683 * but the first one as acked, since they were acknowledged 1684 * before 1685 * */ 1686 if (skb_freed > 1) 1687 info->flags |= IEEE80211_TX_STAT_ACK; 1688 1689 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1690 1691 info->status.rates[0].count = tx_resp->failure_frame + 1; 1692 1693 iwl_mvm_hwrate_to_tx_status(mvm->fw, 1694 le32_to_cpu(tx_resp->initial_rate), 1695 info); 1696 1697 /* Don't assign the converted initial_rate, because driver 1698 * TLC uses this and doesn't support the new FW rate 1699 */ 1700 info->status.status_driver_data[1] = 1701 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1702 1703 /* Single frame failure in an AMPDU queue => send BAR */ 1704 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1705 !(info->flags & IEEE80211_TX_STAT_ACK) && 1706 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1707 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1708 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1709 1710 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1711 if (ieee80211_is_back_req(hdr->frame_control)) 1712 seq_ctl = 0; 1713 else if (status != TX_STATUS_SUCCESS) 1714 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1715 1716 if (unlikely(!seq_ctl)) { 1717 /* 1718 * If it is an NDP, we can't update next_reclaim since 1719 * its sequence control is 0. Note that for that same 1720 * reason, NDPs are never sent to A-MPDU'able queues 1721 * so that we can never have more than one freed frame 1722 * for a single Tx resonse (see WARN_ON below). 1723 */ 1724 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1725 is_ndp = true; 1726 } 1727 1728 /* 1729 * TODO: this is not accurate if we are freeing more than one 1730 * packet. 1731 */ 1732 info->status.tx_time = 1733 le16_to_cpu(tx_resp->wireless_media_time); 1734 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1735 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1736 info->status.status_driver_data[0] = 1737 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1738 1739 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1))) 1740 ieee80211_tx_status_skb(mvm->hw, skb); 1741 } 1742 1743 /* This is an aggregation queue or might become one, so we use 1744 * the ssn since: ssn = wifi seq_num % 256. 1745 * The seq_ctl is the sequence control of the packet to which 1746 * this Tx response relates. But if there is a hole in the 1747 * bitmap of the BA we received, this Tx response may allow to 1748 * reclaim the hole and all the subsequent packets that were 1749 * already acked. In that case, seq_ctl != ssn, and the next 1750 * packet to be reclaimed will be ssn and not seq_ctl. In that 1751 * case, several packets will be reclaimed even if 1752 * frame_count = 1. 1753 * 1754 * The ssn is the index (% 256) of the latest packet that has 1755 * treated (acked / dropped) + 1. 1756 */ 1757 next_reclaimed = ssn; 1758 1759 IWL_DEBUG_TX_REPLY(mvm, 1760 "TXQ %d status %s (0x%08x)\n", 1761 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1762 1763 IWL_DEBUG_TX_REPLY(mvm, 1764 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1765 le32_to_cpu(tx_resp->initial_rate), 1766 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1767 ssn, next_reclaimed, seq_ctl); 1768 1769 rcu_read_lock(); 1770 1771 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1772 /* 1773 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1774 * the firmware while we still have packets for it in the Tx queues. 1775 */ 1776 if (WARN_ON_ONCE(!sta)) 1777 goto out; 1778 1779 if (!IS_ERR(sta)) { 1780 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1781 1782 iwl_mvm_tx_airtime(mvm, mvmsta, 1783 le16_to_cpu(tx_resp->wireless_media_time)); 1784 1785 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1786 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1787 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1788 1789 if (sta->wme && tid != IWL_MGMT_TID) { 1790 struct iwl_mvm_tid_data *tid_data = 1791 &mvmsta->tid_data[tid]; 1792 bool send_eosp_ndp = false; 1793 1794 spin_lock_bh(&mvmsta->lock); 1795 1796 if (!is_ndp) { 1797 tid_data->next_reclaimed = next_reclaimed; 1798 IWL_DEBUG_TX_REPLY(mvm, 1799 "Next reclaimed packet:%d\n", 1800 next_reclaimed); 1801 if (tid < IWL_MAX_TID_COUNT) 1802 iwl_mvm_count_mpdu(mvmsta, sta_id, 1, 1803 true, 0); 1804 } else { 1805 IWL_DEBUG_TX_REPLY(mvm, 1806 "NDP - don't update next_reclaimed\n"); 1807 } 1808 1809 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1810 1811 if (mvmsta->sleep_tx_count) { 1812 mvmsta->sleep_tx_count--; 1813 if (mvmsta->sleep_tx_count && 1814 !iwl_mvm_tid_queued(mvm, tid_data)) { 1815 /* 1816 * The number of frames in the queue 1817 * dropped to 0 even if we sent less 1818 * frames than we thought we had on the 1819 * Tx queue. 1820 * This means we had holes in the BA 1821 * window that we just filled, ask 1822 * mac80211 to send EOSP since the 1823 * firmware won't know how to do that. 1824 * Send NDP and the firmware will send 1825 * EOSP notification that will trigger 1826 * a call to ieee80211_sta_eosp(). 1827 */ 1828 send_eosp_ndp = true; 1829 } 1830 } 1831 1832 spin_unlock_bh(&mvmsta->lock); 1833 if (send_eosp_ndp) { 1834 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1835 IEEE80211_FRAME_RELEASE_UAPSD, 1836 1, tid, false, false); 1837 mvmsta->sleep_tx_count = 0; 1838 ieee80211_send_eosp_nullfunc(sta, tid); 1839 } 1840 } 1841 1842 if (mvmsta->next_status_eosp) { 1843 mvmsta->next_status_eosp = false; 1844 ieee80211_sta_eosp(sta); 1845 } 1846 } 1847 out: 1848 rcu_read_unlock(); 1849 } 1850 1851 #ifdef CONFIG_IWLWIFI_DEBUG 1852 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1853 static const char *iwl_get_agg_tx_status(u16 status) 1854 { 1855 switch (status & AGG_TX_STATE_STATUS_MSK) { 1856 AGG_TX_STATE_(TRANSMITTED); 1857 AGG_TX_STATE_(UNDERRUN); 1858 AGG_TX_STATE_(BT_PRIO); 1859 AGG_TX_STATE_(FEW_BYTES); 1860 AGG_TX_STATE_(ABORT); 1861 AGG_TX_STATE_(TX_ON_AIR_DROP); 1862 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1863 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1864 AGG_TX_STATE_(SCD_QUERY); 1865 AGG_TX_STATE_(TEST_BAD_CRC32); 1866 AGG_TX_STATE_(RESPONSE); 1867 AGG_TX_STATE_(DUMP_TX); 1868 AGG_TX_STATE_(DELAY_TX); 1869 } 1870 1871 return "UNKNOWN"; 1872 } 1873 1874 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1875 struct iwl_rx_packet *pkt) 1876 { 1877 struct iwl_tx_resp *tx_resp = (void *)pkt->data; 1878 struct agg_tx_status *frame_status = 1879 iwl_mvm_get_agg_status(mvm, tx_resp); 1880 int i; 1881 bool tirgger_timepoint = false; 1882 1883 for (i = 0; i < tx_resp->frame_count; i++) { 1884 u16 fstatus = le16_to_cpu(frame_status[i].status); 1885 /* In case one frame wasn't transmitted trigger time point */ 1886 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1887 AGG_TX_STATE_TRANSMITTED); 1888 IWL_DEBUG_TX_REPLY(mvm, 1889 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1890 iwl_get_agg_tx_status(fstatus), 1891 fstatus & AGG_TX_STATE_STATUS_MSK, 1892 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1893 AGG_TX_STATE_TRY_CNT_POS, 1894 le16_to_cpu(frame_status[i].sequence)); 1895 } 1896 1897 if (tirgger_timepoint) 1898 iwl_dbg_tlv_time_point(&mvm->fwrt, 1899 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1900 1901 } 1902 #else 1903 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1904 struct iwl_rx_packet *pkt) 1905 {} 1906 #endif /* CONFIG_IWLWIFI_DEBUG */ 1907 1908 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1909 struct iwl_rx_packet *pkt) 1910 { 1911 struct iwl_tx_resp *tx_resp = (void *)pkt->data; 1912 int sta_id = IWL_TX_RES_GET_RA(tx_resp->ra_tid); 1913 int tid = IWL_TX_RES_GET_TID(tx_resp->ra_tid); 1914 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1915 struct iwl_mvm_sta *mvmsta; 1916 int queue = SEQ_TO_QUEUE(sequence); 1917 struct ieee80211_sta *sta; 1918 1919 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1920 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1921 return; 1922 1923 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1924 1925 rcu_read_lock(); 1926 1927 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1928 1929 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1930 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) { 1931 rcu_read_unlock(); 1932 return; 1933 } 1934 1935 if (!WARN_ON_ONCE(!mvmsta)) { 1936 mvmsta->tid_data[tid].rate_n_flags = 1937 le32_to_cpu(tx_resp->initial_rate); 1938 mvmsta->tid_data[tid].tx_time = 1939 le16_to_cpu(tx_resp->wireless_media_time); 1940 mvmsta->tid_data[tid].lq_color = 1941 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1942 iwl_mvm_tx_airtime(mvm, mvmsta, 1943 le16_to_cpu(tx_resp->wireless_media_time)); 1944 } 1945 1946 rcu_read_unlock(); 1947 } 1948 1949 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1950 { 1951 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1952 struct iwl_tx_resp *tx_resp = (void *)pkt->data; 1953 1954 if (tx_resp->frame_count == 1) 1955 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1956 else 1957 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1958 } 1959 1960 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1961 int txq, int index, 1962 struct ieee80211_tx_info *tx_info, u32 rate, 1963 bool is_flush) 1964 { 1965 struct sk_buff_head reclaimed_skbs; 1966 struct iwl_mvm_tid_data *tid_data = NULL; 1967 struct ieee80211_sta *sta; 1968 struct iwl_mvm_sta *mvmsta = NULL; 1969 struct sk_buff *skb; 1970 int freed; 1971 1972 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1973 tid > IWL_MAX_TID_COUNT, 1974 "sta_id %d tid %d", sta_id, tid)) 1975 return; 1976 1977 rcu_read_lock(); 1978 1979 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1980 1981 /* Reclaiming frames for a station that has been deleted ? */ 1982 if (WARN_ON_ONCE(!sta)) { 1983 rcu_read_unlock(); 1984 return; 1985 } 1986 1987 __skb_queue_head_init(&reclaimed_skbs); 1988 1989 /* 1990 * Release all TFDs before the SSN, i.e. all TFDs in front of 1991 * block-ack window (we assume that they've been successfully 1992 * transmitted ... if not, it's too late anyway). 1993 */ 1994 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush); 1995 1996 skb_queue_walk(&reclaimed_skbs, skb) { 1997 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1998 1999 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 2000 2001 memset(&info->status, 0, sizeof(info->status)); 2002 /* Packet was transmitted successfully, failures come as single 2003 * frames because before failing a frame the firmware transmits 2004 * it without aggregation at least once. 2005 */ 2006 if (!is_flush) 2007 info->flags |= IEEE80211_TX_STAT_ACK; 2008 else 2009 info->flags &= ~IEEE80211_TX_STAT_ACK; 2010 } 2011 2012 /* 2013 * It's possible to get a BA response after invalidating the rcu (rcu is 2014 * invalidated in order to prevent new Tx from being sent, but there may 2015 * be some frames already in-flight). 2016 * In this case we just want to reclaim, and could skip all the 2017 * sta-dependent stuff since it's in the middle of being removed 2018 * anyways. 2019 */ 2020 if (IS_ERR(sta)) 2021 goto out; 2022 2023 mvmsta = iwl_mvm_sta_from_mac80211(sta); 2024 tid_data = &mvmsta->tid_data[tid]; 2025 2026 if (tid_data->txq_id != txq) { 2027 IWL_ERR(mvm, 2028 "invalid reclaim request: Q %d, tid %d\n", 2029 tid_data->txq_id, tid); 2030 rcu_read_unlock(); 2031 return; 2032 } 2033 2034 spin_lock_bh(&mvmsta->lock); 2035 2036 tid_data->next_reclaimed = index; 2037 2038 iwl_mvm_check_ratid_empty(mvm, sta, tid); 2039 2040 freed = 0; 2041 2042 /* pack lq color from tid_data along the reduced txp */ 2043 tx_info->status.status_driver_data[0] = 2044 RS_DRV_DATA_PACK(tid_data->lq_color, 2045 tx_info->status.status_driver_data[0]); 2046 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 2047 2048 skb_queue_walk(&reclaimed_skbs, skb) { 2049 struct ieee80211_hdr *hdr = (void *)skb->data; 2050 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2051 2052 if (!is_flush) { 2053 if (ieee80211_is_data_qos(hdr->frame_control)) 2054 freed++; 2055 else 2056 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 2057 } 2058 2059 /* this is the first skb we deliver in this batch */ 2060 /* put the rate scaling data there */ 2061 if (freed == 1) { 2062 info->flags |= IEEE80211_TX_STAT_AMPDU; 2063 memcpy(&info->status, &tx_info->status, 2064 sizeof(tx_info->status)); 2065 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info); 2066 } 2067 } 2068 2069 spin_unlock_bh(&mvmsta->lock); 2070 2071 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 2072 * possible (i.e. first MPDU in the aggregation wasn't acked) 2073 * Still it's important to update RS about sent vs. acked. 2074 */ 2075 if (!is_flush && skb_queue_empty(&reclaimed_skbs) && 2076 !iwl_mvm_has_tlc_offload(mvm)) { 2077 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 2078 2079 /* no TLC offload, so non-MLD mode */ 2080 if (mvmsta->vif) 2081 chanctx_conf = 2082 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf); 2083 2084 if (WARN_ON_ONCE(!chanctx_conf)) 2085 goto out; 2086 2087 tx_info->band = chanctx_conf->def.chan->band; 2088 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info); 2089 2090 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 2091 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 2092 } 2093 2094 out: 2095 rcu_read_unlock(); 2096 2097 while (!skb_queue_empty(&reclaimed_skbs)) { 2098 skb = __skb_dequeue(&reclaimed_skbs); 2099 ieee80211_tx_status_skb(mvm->hw, skb); 2100 } 2101 } 2102 2103 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2104 { 2105 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2106 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 2107 int sta_id, tid, txq, index; 2108 struct ieee80211_tx_info ba_info = {}; 2109 struct iwl_mvm_ba_notif *ba_notif; 2110 struct iwl_mvm_tid_data *tid_data; 2111 struct iwl_mvm_sta *mvmsta; 2112 2113 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 2114 2115 if (iwl_mvm_has_new_tx_api(mvm)) { 2116 struct iwl_compressed_ba_notif *ba_res = 2117 (void *)pkt->data; 2118 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 2119 u16 tfd_cnt; 2120 int i; 2121 2122 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len, 2123 "short BA notification (%d)\n", pkt_len)) 2124 return; 2125 2126 sta_id = ba_res->sta_id; 2127 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 2128 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 2129 ba_info.status.tx_time = 2130 (u16)le32_to_cpu(ba_res->wireless_time); 2131 ba_info.status.status_driver_data[0] = 2132 (void *)(uintptr_t)ba_res->reduced_txp; 2133 2134 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 2135 if (!tfd_cnt) 2136 return; 2137 2138 if (IWL_FW_CHECK(mvm, 2139 struct_size(ba_res, tfd, tfd_cnt) > pkt_len, 2140 "short BA notification (tfds:%d, size:%d)\n", 2141 tfd_cnt, pkt_len)) 2142 return; 2143 2144 IWL_DEBUG_TX_REPLY(mvm, 2145 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2146 sta_id, le32_to_cpu(ba_res->flags), 2147 le16_to_cpu(ba_res->txed), 2148 le16_to_cpu(ba_res->done)); 2149 2150 rcu_read_lock(); 2151 2152 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2153 /* 2154 * It's possible to get a BA response after invalidating the rcu 2155 * (rcu is invalidated in order to prevent new Tx from being 2156 * sent, but there may be some frames already in-flight). 2157 * In this case we just want to reclaim, and could skip all the 2158 * sta-dependent stuff since it's in the middle of being removed 2159 * anyways. 2160 */ 2161 2162 /* Free per TID */ 2163 for (i = 0; i < tfd_cnt; i++) { 2164 struct iwl_compressed_ba_tfd *ba_tfd = &ba_res->tfd[i]; 2165 2166 tid = ba_tfd->tid; 2167 if (tid == IWL_MGMT_TID) 2168 tid = IWL_MAX_TID_COUNT; 2169 2170 if (mvmsta) 2171 mvmsta->tid_data[i].lq_color = lq_color; 2172 2173 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 2174 (int)(le16_to_cpu(ba_tfd->q_num)), 2175 le16_to_cpu(ba_tfd->tfd_index), 2176 &ba_info, 2177 le32_to_cpu(ba_res->tx_rate), false); 2178 } 2179 2180 if (mvmsta) { 2181 iwl_mvm_tx_airtime(mvm, mvmsta, 2182 le32_to_cpu(ba_res->wireless_time)); 2183 2184 iwl_mvm_count_mpdu(mvmsta, sta_id, 2185 le16_to_cpu(ba_res->txed), true, 0); 2186 } 2187 rcu_read_unlock(); 2188 return; 2189 } 2190 2191 ba_notif = (void *)pkt->data; 2192 sta_id = ba_notif->sta_id; 2193 tid = ba_notif->tid; 2194 /* "flow" corresponds to Tx queue */ 2195 txq = le16_to_cpu(ba_notif->scd_flow); 2196 /* "ssn" is start of block-ack Tx window, corresponds to index 2197 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2198 index = le16_to_cpu(ba_notif->scd_ssn); 2199 2200 rcu_read_lock(); 2201 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2202 if (IWL_FW_CHECK(mvm, !mvmsta, 2203 "invalid STA ID %d in BA notif\n", 2204 sta_id)) { 2205 rcu_read_unlock(); 2206 return; 2207 } 2208 2209 tid_data = &mvmsta->tid_data[tid]; 2210 2211 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2212 ba_info.status.ampdu_len = ba_notif->txed; 2213 ba_info.status.tx_time = tid_data->tx_time; 2214 ba_info.status.status_driver_data[0] = 2215 (void *)(uintptr_t)ba_notif->reduced_txp; 2216 2217 rcu_read_unlock(); 2218 2219 IWL_DEBUG_TX_REPLY(mvm, 2220 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2221 ba_notif->sta_addr, ba_notif->sta_id); 2222 2223 IWL_DEBUG_TX_REPLY(mvm, 2224 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2225 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2226 le64_to_cpu(ba_notif->bitmap), txq, index, 2227 ba_notif->txed, ba_notif->txed_2_done); 2228 2229 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2230 ba_notif->reduced_txp); 2231 2232 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2233 tid_data->rate_n_flags, false); 2234 } 2235 2236 /* 2237 * Note that there are transports that buffer frames before they reach 2238 * the firmware. This means that after flush_tx_path is called, the 2239 * queue might not be empty. The race-free way to handle this is to: 2240 * 1) set the station as draining 2241 * 2) flush the Tx path 2242 * 3) wait for the transport queues to be empty 2243 */ 2244 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2245 { 2246 int ret; 2247 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2248 .queues_ctl = cpu_to_le32(tfd_msk), 2249 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2250 }; 2251 2252 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2253 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2254 sizeof(flush_cmd), &flush_cmd); 2255 if (ret) 2256 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2257 return ret; 2258 } 2259 2260 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2261 { 2262 int ret; 2263 struct iwl_tx_path_flush_cmd_rsp *rsp; 2264 struct iwl_tx_path_flush_cmd flush_cmd = { 2265 .sta_id = cpu_to_le32(sta_id), 2266 .tid_mask = cpu_to_le16(tids), 2267 }; 2268 2269 struct iwl_host_cmd cmd = { 2270 .id = TXPATH_FLUSH, 2271 .len = { sizeof(flush_cmd), }, 2272 .data = { &flush_cmd, }, 2273 }; 2274 2275 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2276 2277 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2278 cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL; 2279 2280 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2281 sta_id, tids); 2282 2283 ret = iwl_mvm_send_cmd(mvm, &cmd); 2284 2285 if (ret) { 2286 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2287 return ret; 2288 } 2289 2290 if (cmd.flags & CMD_WANT_SKB) { 2291 int i; 2292 int num_flushed_queues; 2293 2294 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2295 ret = -EIO; 2296 goto free_rsp; 2297 } 2298 2299 rsp = (void *)cmd.resp_pkt->data; 2300 2301 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2302 "sta_id %d != rsp_sta_id %d", 2303 sta_id, le16_to_cpu(rsp->sta_id))) { 2304 ret = -EIO; 2305 goto free_rsp; 2306 } 2307 2308 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2309 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2310 "num_flushed_queues %d", num_flushed_queues)) { 2311 ret = -EIO; 2312 goto free_rsp; 2313 } 2314 2315 for (i = 0; i < num_flushed_queues; i++) { 2316 struct ieee80211_tx_info tx_info = {}; 2317 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2318 int tid = le16_to_cpu(queue_info->tid); 2319 int read_before = le16_to_cpu(queue_info->read_before_flush); 2320 int read_after = le16_to_cpu(queue_info->read_after_flush); 2321 int queue_num = le16_to_cpu(queue_info->queue_num); 2322 2323 if (tid == IWL_MGMT_TID) 2324 tid = IWL_MAX_TID_COUNT; 2325 2326 IWL_DEBUG_TX_QUEUES(mvm, 2327 "tid %d queue_id %d read-before %d read-after %d\n", 2328 tid, queue_num, read_before, read_after); 2329 2330 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2331 &tx_info, 0, true); 2332 } 2333 free_rsp: 2334 iwl_free_resp(&cmd); 2335 } 2336 return ret; 2337 } 2338 2339 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask) 2340 { 2341 if (iwl_mvm_has_new_tx_api(mvm)) 2342 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff); 2343 2344 return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask); 2345 } 2346