1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2024 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 "mvm.h" 17 #include "sta.h" 18 #include "time-sync.h" 19 20 static void 21 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 22 u16 tid, u16 ssn) 23 { 24 struct iwl_fw_dbg_trigger_tlv *trig; 25 struct iwl_fw_dbg_trigger_ba *ba_trig; 26 27 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA); 28 if (!trig) 29 return; 30 31 ba_trig = (void *)trig->data; 32 33 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 34 return; 35 36 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 37 "BAR sent to %pM, tid %d, ssn %d", 38 addr, tid, ssn); 39 } 40 41 #define OPT_HDR(type, skb, off) \ 42 (type *)(skb_network_header(skb) + (off)) 43 44 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 45 struct ieee80211_tx_info *info, 46 bool amsdu) 47 { 48 struct ieee80211_hdr *hdr = (void *)skb->data; 49 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 50 u16 offload_assist = 0; 51 #if IS_ENABLED(CONFIG_INET) 52 u8 protocol = 0; 53 54 /* Do not compute checksum if already computed */ 55 if (skb->ip_summed != CHECKSUM_PARTIAL) 56 goto out; 57 58 /* We do not expect to be requested to csum stuff we do not support */ 59 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 60 (skb->protocol != htons(ETH_P_IP) && 61 skb->protocol != htons(ETH_P_IPV6)), 62 "No support for requested checksum\n")) { 63 skb_checksum_help(skb); 64 goto out; 65 } 66 67 if (skb->protocol == htons(ETH_P_IP)) { 68 protocol = ip_hdr(skb)->protocol; 69 } else { 70 #if IS_ENABLED(CONFIG_IPV6) 71 struct ipv6hdr *ipv6h = 72 (struct ipv6hdr *)skb_network_header(skb); 73 unsigned int off = sizeof(*ipv6h); 74 75 protocol = ipv6h->nexthdr; 76 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 77 struct ipv6_opt_hdr *hp; 78 79 /* only supported extension headers */ 80 if (protocol != NEXTHDR_ROUTING && 81 protocol != NEXTHDR_HOP && 82 protocol != NEXTHDR_DEST) { 83 skb_checksum_help(skb); 84 goto out; 85 } 86 87 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 88 protocol = hp->nexthdr; 89 off += ipv6_optlen(hp); 90 } 91 /* if we get here - protocol now should be TCP/UDP */ 92 #endif 93 } 94 95 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 96 WARN_ON_ONCE(1); 97 skb_checksum_help(skb); 98 goto out; 99 } 100 101 /* enable L4 csum */ 102 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 103 104 /* 105 * Set offset to IP header (snap). 106 * We don't support tunneling so no need to take care of inner header. 107 * Size is in words. 108 */ 109 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 110 111 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 112 if (skb->protocol == htons(ETH_P_IP) && amsdu) { 113 ip_hdr(skb)->check = 0; 114 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 115 } 116 117 /* reset UDP/TCP header csum */ 118 if (protocol == IPPROTO_TCP) 119 tcp_hdr(skb)->check = 0; 120 else 121 udp_hdr(skb)->check = 0; 122 123 out: 124 #endif 125 /* 126 * mac header len should include IV, size is in words unless 127 * the IV is added by the firmware like in WEP. 128 * In new Tx API, the IV is always added by the firmware. 129 */ 130 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 131 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 132 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 133 mh_len += info->control.hw_key->iv_len; 134 mh_len /= 2; 135 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 136 137 if (amsdu) 138 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 139 else if (ieee80211_hdrlen(hdr->frame_control) % 4) 140 /* padding is inserted later in transport */ 141 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 142 143 return offload_assist; 144 } 145 146 /* 147 * Sets most of the Tx cmd's fields 148 */ 149 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 150 struct iwl_tx_cmd *tx_cmd, 151 struct ieee80211_tx_info *info, u8 sta_id) 152 { 153 struct ieee80211_hdr *hdr = (void *)skb->data; 154 __le16 fc = hdr->frame_control; 155 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 156 u32 len = skb->len + FCS_LEN; 157 bool amsdu = false; 158 u8 ac; 159 160 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) || 161 (ieee80211_is_probe_resp(fc) && 162 !is_multicast_ether_addr(hdr->addr1))) 163 tx_flags |= TX_CMD_FLG_ACK; 164 else 165 tx_flags &= ~TX_CMD_FLG_ACK; 166 167 if (ieee80211_is_probe_resp(fc)) 168 tx_flags |= TX_CMD_FLG_TSF; 169 170 if (ieee80211_has_morefrags(fc)) 171 tx_flags |= TX_CMD_FLG_MORE_FRAG; 172 173 if (ieee80211_is_data_qos(fc)) { 174 u8 *qc = ieee80211_get_qos_ctl(hdr); 175 tx_cmd->tid_tspec = qc[0] & 0xf; 176 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 177 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 178 } else if (ieee80211_is_back_req(fc)) { 179 struct ieee80211_bar *bar = (void *)skb->data; 180 u16 control = le16_to_cpu(bar->control); 181 u16 ssn = le16_to_cpu(bar->start_seq_num); 182 183 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 184 tx_cmd->tid_tspec = (control & 185 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 186 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 187 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 188 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 189 ssn); 190 } else { 191 if (ieee80211_is_data(fc)) 192 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 193 else 194 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT; 195 196 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 197 tx_flags |= TX_CMD_FLG_SEQ_CTL; 198 else 199 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 200 } 201 202 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */ 203 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 204 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 205 else 206 ac = tid_to_mac80211_ac[0]; 207 208 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 209 TX_CMD_FLG_BT_PRIO_POS; 210 211 if (ieee80211_is_mgmt(fc)) { 212 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 213 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 214 else if (ieee80211_is_action(fc)) 215 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 216 else 217 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 218 219 /* The spec allows Action frames in A-MPDU, we don't support 220 * it 221 */ 222 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 223 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 224 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 225 } else { 226 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 227 } 228 229 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 230 !is_multicast_ether_addr(hdr->addr1)) 231 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 232 233 if (fw_has_capa(&mvm->fw->ucode_capa, 234 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 235 ieee80211_action_contains_tpc(skb)) 236 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 237 238 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 239 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 240 tx_cmd->len = cpu_to_le16((u16)skb->len); 241 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 242 tx_cmd->sta_id = sta_id; 243 244 tx_cmd->offload_assist = 245 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu)); 246 } 247 248 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, 249 struct ieee80211_tx_info *info, 250 struct ieee80211_sta *sta, __le16 fc) 251 { 252 if (info->band == NL80211_BAND_2GHZ && 253 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 254 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 255 256 if (sta && ieee80211_is_data(fc)) { 257 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 258 259 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS; 260 } 261 262 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 263 } 264 265 static u32 iwl_mvm_convert_rate_idx(struct iwl_mvm *mvm, 266 struct ieee80211_tx_info *info, 267 int rate_idx) 268 { 269 u32 rate_flags = 0; 270 u8 rate_plcp; 271 bool is_cck; 272 273 /* if the rate isn't a well known legacy rate, take the lowest one */ 274 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 275 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm, 276 info, 277 info->control.vif); 278 279 /* Get PLCP rate for tx_cmd->rate_n_flags */ 280 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx); 281 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && 282 (rate_idx <= IWL_LAST_CCK_RATE); 283 284 /* Set CCK or OFDM flag */ 285 if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) { 286 if (!is_cck) 287 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK; 288 else 289 rate_flags |= RATE_MCS_CCK_MSK; 290 } else if (is_cck) { 291 rate_flags |= RATE_MCS_CCK_MSK_V1; 292 } 293 294 return (u32)rate_plcp | rate_flags; 295 } 296 297 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm, 298 struct ieee80211_tx_info *info, 299 struct ieee80211_sta *sta, 300 __le16 fc) 301 { 302 struct ieee80211_tx_rate *rate = &info->control.rates[0]; 303 u32 result; 304 305 /* 306 * we only care about legacy/HT/VHT so far, so we can 307 * build in v1 and use iwl_new_rate_from_v1() 308 */ 309 310 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { 311 u8 mcs = ieee80211_rate_get_vht_mcs(rate); 312 u8 nss = ieee80211_rate_get_vht_nss(rate); 313 314 result = RATE_MCS_VHT_MSK_V1; 315 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK); 316 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK); 317 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 318 result |= RATE_MCS_SGI_MSK_V1; 319 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 320 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 321 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 322 result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1); 323 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 324 result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1); 325 326 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6) 327 result = iwl_new_rate_from_v1(result); 328 } else if (rate->flags & IEEE80211_TX_RC_MCS) { 329 result = RATE_MCS_HT_MSK_V1; 330 result |= u32_encode_bits(rate->idx, 331 RATE_HT_MCS_RATE_CODE_MSK_V1 | 332 RATE_HT_MCS_NSS_MSK_V1); 333 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 334 result |= RATE_MCS_SGI_MSK_V1; 335 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 336 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 337 if (info->flags & IEEE80211_TX_CTL_LDPC) 338 result |= RATE_MCS_LDPC_MSK_V1; 339 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC)) 340 result |= RATE_MCS_STBC_MSK; 341 342 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6) 343 result = iwl_new_rate_from_v1(result); 344 } else { 345 int rate_idx = info->control.rates[0].idx; 346 347 result = iwl_mvm_convert_rate_idx(mvm, info, rate_idx); 348 } 349 350 if (info->control.antennas) 351 result |= u32_encode_bits(info->control.antennas, 352 RATE_MCS_ANT_AB_MSK); 353 else 354 result |= iwl_mvm_get_tx_ant(mvm, info, sta, fc); 355 356 return result; 357 } 358 359 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 360 struct ieee80211_tx_info *info, 361 struct ieee80211_sta *sta, __le16 fc) 362 { 363 int rate_idx = -1; 364 365 if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { 366 /* info->control is only relevant for non HW rate control */ 367 368 /* HT rate doesn't make sense for a non data frame */ 369 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && 370 !ieee80211_is_data(fc), 371 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", 372 info->control.rates[0].flags, 373 info->control.rates[0].idx, 374 le16_to_cpu(fc), 375 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 376 377 rate_idx = info->control.rates[0].idx; 378 379 /* For non 2 GHZ band, remap mac80211 rate indices into driver 380 * indices. 381 */ 382 if (info->band != NL80211_BAND_2GHZ || 383 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE)) 384 rate_idx += IWL_FIRST_OFDM_RATE; 385 386 /* For 2.4 GHZ band, check that there is no need to remap */ 387 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 388 } 389 390 return iwl_mvm_convert_rate_idx(mvm, info, rate_idx); 391 } 392 393 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 394 struct ieee80211_tx_info *info, 395 struct ieee80211_sta *sta, __le16 fc) 396 { 397 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) 398 return iwl_mvm_get_inject_tx_rate(mvm, info, sta, fc); 399 400 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) | 401 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 402 } 403 404 /* 405 * Sets the fields in the Tx cmd that are rate related 406 */ 407 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 408 struct ieee80211_tx_info *info, 409 struct ieee80211_sta *sta, __le16 fc) 410 { 411 /* Set retry limit on RTS packets */ 412 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 413 414 /* Set retry limit on DATA packets and Probe Responses*/ 415 if (ieee80211_is_probe_resp(fc)) { 416 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 417 tx_cmd->rts_retry_limit = 418 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 419 } else if (ieee80211_is_back_req(fc)) { 420 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 421 } else { 422 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 423 } 424 425 /* 426 * for data packets, rate info comes from the table inside the fw. This 427 * table is controlled by LINK_QUALITY commands 428 */ 429 430 if (likely(ieee80211_is_data(fc) && sta && 431 !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) { 432 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 433 434 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 435 tx_cmd->initial_rate_index = 0; 436 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 437 return; 438 } 439 } else if (ieee80211_is_back_req(fc)) { 440 tx_cmd->tx_flags |= 441 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 442 } 443 444 /* Set the rate in the TX cmd */ 445 tx_cmd->rate_n_flags = 446 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 447 } 448 449 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 450 u8 *crypto_hdr) 451 { 452 struct ieee80211_key_conf *keyconf = info->control.hw_key; 453 u64 pn; 454 455 pn = atomic64_inc_return(&keyconf->tx_pn); 456 crypto_hdr[0] = pn; 457 crypto_hdr[2] = 0; 458 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 459 crypto_hdr[1] = pn >> 8; 460 crypto_hdr[4] = pn >> 16; 461 crypto_hdr[5] = pn >> 24; 462 crypto_hdr[6] = pn >> 32; 463 crypto_hdr[7] = pn >> 40; 464 } 465 466 /* 467 * Sets the fields in the Tx cmd that are crypto related 468 */ 469 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 470 struct ieee80211_tx_info *info, 471 struct iwl_tx_cmd *tx_cmd, 472 struct sk_buff *skb_frag, 473 int hdrlen) 474 { 475 struct ieee80211_key_conf *keyconf = info->control.hw_key; 476 u8 *crypto_hdr = skb_frag->data + hdrlen; 477 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 478 u64 pn; 479 480 switch (keyconf->cipher) { 481 case WLAN_CIPHER_SUITE_CCMP: 482 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 483 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 484 break; 485 486 case WLAN_CIPHER_SUITE_TKIP: 487 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 488 pn = atomic64_inc_return(&keyconf->tx_pn); 489 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 490 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 491 break; 492 493 case WLAN_CIPHER_SUITE_WEP104: 494 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 495 fallthrough; 496 case WLAN_CIPHER_SUITE_WEP40: 497 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 498 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 499 TX_CMD_SEC_WEP_KEY_IDX_MSK); 500 501 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 502 break; 503 case WLAN_CIPHER_SUITE_GCMP: 504 case WLAN_CIPHER_SUITE_GCMP_256: 505 type = TX_CMD_SEC_GCMP; 506 fallthrough; 507 case WLAN_CIPHER_SUITE_CCMP_256: 508 /* TODO: Taking the key from the table might introduce a race 509 * when PTK rekeying is done, having an old packets with a PN 510 * based on the old key but the message encrypted with a new 511 * one. 512 * Need to handle this. 513 */ 514 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 515 tx_cmd->key[0] = keyconf->hw_key_idx; 516 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 517 break; 518 default: 519 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 520 } 521 } 522 523 static bool iwl_mvm_use_host_rate(struct iwl_mvm *mvm, 524 struct iwl_mvm_sta *mvmsta, 525 struct ieee80211_hdr *hdr, 526 struct ieee80211_tx_info *info) 527 { 528 if (unlikely(!mvmsta)) 529 return true; 530 531 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) 532 return true; 533 534 if (likely(ieee80211_is_data(hdr->frame_control) && 535 mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED)) 536 return false; 537 538 /* 539 * Not a data frame, use host rate if on an old device that 540 * can't possibly be doing MLO (firmware may be selecting a 541 * bad rate), if we might be doing MLO we need to let FW pick 542 * (since we don't necesarily know the link), but FW rate 543 * selection was fixed. 544 */ 545 return mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ; 546 } 547 548 static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen, 549 const u8 *addr3_override) 550 { 551 struct ieee80211_hdr *out_hdr = cmd; 552 553 memcpy(cmd, hdr, hdrlen); 554 if (addr3_override) 555 memcpy(out_hdr->addr3, addr3_override, ETH_ALEN); 556 } 557 558 /* 559 * Allocates and sets the Tx cmd the driver data pointers in the skb 560 */ 561 static struct iwl_device_tx_cmd * 562 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 563 struct ieee80211_tx_info *info, int hdrlen, 564 struct ieee80211_sta *sta, u8 sta_id, 565 const u8 *addr3_override) 566 { 567 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 568 struct iwl_device_tx_cmd *dev_cmd; 569 struct iwl_tx_cmd *tx_cmd; 570 571 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 572 573 if (unlikely(!dev_cmd)) 574 return NULL; 575 576 dev_cmd->hdr.cmd = TX_CMD; 577 578 if (iwl_mvm_has_new_tx_api(mvm)) { 579 u32 rate_n_flags = 0; 580 u16 flags = 0; 581 struct iwl_mvm_sta *mvmsta = sta ? 582 iwl_mvm_sta_from_mac80211(sta) : NULL; 583 bool amsdu = false; 584 585 if (ieee80211_is_data_qos(hdr->frame_control)) { 586 u8 *qc = ieee80211_get_qos_ctl(hdr); 587 588 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 589 } 590 591 if (!info->control.hw_key) 592 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 593 594 /* 595 * For data and mgmt packets rate info comes from the fw (for 596 * new devices, older FW is somewhat broken for this). Only 597 * set rate/antenna for injected frames with fixed rate, or 598 * when no sta is given, or with older firmware. 599 */ 600 if (unlikely(iwl_mvm_use_host_rate(mvm, mvmsta, hdr, info))) { 601 flags |= IWL_TX_FLAGS_CMD_RATE; 602 rate_n_flags = 603 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 604 hdr->frame_control); 605 } else if (!ieee80211_is_data(hdr->frame_control) || 606 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 607 /* These are important frames */ 608 flags |= IWL_TX_FLAGS_HIGH_PRI; 609 } 610 611 if (mvm->trans->trans_cfg->device_family >= 612 IWL_DEVICE_FAMILY_AX210) { 613 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 614 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, 615 info, amsdu); 616 617 cmd->offload_assist = cpu_to_le32(offload_assist); 618 619 /* Total # bytes to be transmitted */ 620 cmd->len = cpu_to_le16((u16)skb->len); 621 622 /* Copy MAC header from skb into command buffer */ 623 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override); 624 625 cmd->flags = cpu_to_le16(flags); 626 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 627 } else { 628 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 629 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb, 630 info, amsdu); 631 632 cmd->offload_assist = cpu_to_le16(offload_assist); 633 634 /* Total # bytes to be transmitted */ 635 cmd->len = cpu_to_le16((u16)skb->len); 636 637 /* Copy MAC header from skb into command buffer */ 638 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override); 639 640 cmd->flags = cpu_to_le32(flags); 641 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 642 } 643 goto out; 644 } 645 646 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 647 648 if (info->control.hw_key) 649 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 650 651 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 652 653 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 654 655 /* Copy MAC header from skb into command buffer */ 656 iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override); 657 658 out: 659 return dev_cmd; 660 } 661 662 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 663 struct iwl_device_tx_cmd *cmd) 664 { 665 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 666 667 memset(&skb_info->status, 0, sizeof(skb_info->status)); 668 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 669 670 skb_info->driver_data[1] = cmd; 671 } 672 673 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 674 struct iwl_mvm_vif_link_info *link, 675 struct ieee80211_tx_info *info, 676 struct sk_buff *skb) 677 { 678 struct ieee80211_hdr *hdr = (void *)skb->data; 679 __le16 fc = hdr->frame_control; 680 681 switch (info->control.vif->type) { 682 case NL80211_IFTYPE_AP: 683 case NL80211_IFTYPE_ADHOC: 684 /* 685 * Non-bufferable frames use the broadcast station, thus they 686 * use the probe queue. 687 * Also take care of the case where we send a deauth to a 688 * station that we don't have, or similarly an association 689 * response (with non-success status) for a station we can't 690 * accept. 691 * Also, disassociate frames might happen, particular with 692 * reason 7 ("Class 3 frame received from nonassociated STA"). 693 */ 694 if (ieee80211_is_mgmt(fc) && 695 (!ieee80211_is_bufferable_mmpdu(skb) || 696 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 697 return link->mgmt_queue; 698 699 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 700 is_multicast_ether_addr(hdr->addr1)) 701 return link->cab_queue; 702 703 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 704 "fc=0x%02x", le16_to_cpu(fc)); 705 return link->mgmt_queue; 706 case NL80211_IFTYPE_P2P_DEVICE: 707 if (ieee80211_is_mgmt(fc)) 708 return mvm->p2p_dev_queue; 709 710 WARN_ON_ONCE(1); 711 return mvm->p2p_dev_queue; 712 default: 713 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 714 return -1; 715 } 716 } 717 718 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 719 struct sk_buff *skb) 720 { 721 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 722 struct iwl_mvm_vif *mvmvif = 723 iwl_mvm_vif_from_mac80211(info->control.vif); 724 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 725 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 726 struct iwl_probe_resp_data *resp_data; 727 const u8 *ie; 728 u8 *pos; 729 u8 match[] = { 730 (WLAN_OUI_WFA >> 16) & 0xff, 731 (WLAN_OUI_WFA >> 8) & 0xff, 732 WLAN_OUI_WFA & 0xff, 733 WLAN_OUI_TYPE_WFA_P2P, 734 }; 735 736 rcu_read_lock(); 737 738 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data); 739 if (!resp_data) 740 goto out; 741 742 if (!resp_data->notif.noa_active) 743 goto out; 744 745 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 746 mgmt->u.probe_resp.variable, 747 skb->len - base_len, 748 match, 4, 2); 749 if (!ie) { 750 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 751 goto out; 752 } 753 754 if (skb_tailroom(skb) < resp_data->noa_len) { 755 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 756 IWL_ERR(mvm, 757 "Failed to reallocate probe resp\n"); 758 goto out; 759 } 760 } 761 762 pos = skb_put(skb, resp_data->noa_len); 763 764 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 765 /* Set length of IE body (not including ID and length itself) */ 766 *pos++ = resp_data->noa_len - 2; 767 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 768 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 769 *pos++ = WLAN_OUI_WFA & 0xff; 770 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 771 772 memcpy(pos, &resp_data->notif.noa_attr, 773 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 774 775 out: 776 rcu_read_unlock(); 777 } 778 779 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 780 { 781 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 782 struct ieee80211_tx_info info; 783 struct iwl_device_tx_cmd *dev_cmd; 784 u8 sta_id; 785 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 786 __le16 fc = hdr->frame_control; 787 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 788 IEEE80211_TX_CTL_TX_OFFCHAN; 789 int queue = -1; 790 791 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 792 return -1; 793 794 memcpy(&info, skb->cb, sizeof(info)); 795 796 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 797 return -1; 798 799 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 800 return -1; 801 802 if (info.control.vif) { 803 struct iwl_mvm_vif *mvmvif = 804 iwl_mvm_vif_from_mac80211(info.control.vif); 805 bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm); 806 807 if ((info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE && 808 p2p_aux) || 809 (info.control.vif->type == NL80211_IFTYPE_STATION && 810 offchannel)) { 811 /* 812 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 813 * that can be used in 2 different types of vifs, P2P 814 * Device and STATION. 815 * P2P Device uses the offchannel queue. 816 * STATION (HS2.0) uses the auxiliary context of the FW, 817 * and hence needs to be sent on the aux queue. 818 * If P2P_DEV_OVER_AUX is supported (p2p_aux = true) 819 * also P2P Device uses the aux queue. 820 */ 821 sta_id = mvm->aux_sta.sta_id; 822 queue = mvm->aux_queue; 823 if (WARN_ON(queue == IWL_MVM_INVALID_QUEUE)) 824 return -1; 825 } else if (info.control.vif->type == 826 NL80211_IFTYPE_P2P_DEVICE || 827 info.control.vif->type == NL80211_IFTYPE_AP || 828 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 829 u32 link_id = u32_get_bits(info.control.flags, 830 IEEE80211_TX_CTRL_MLO_LINK); 831 struct iwl_mvm_vif_link_info *link; 832 833 if (link_id == IEEE80211_LINK_UNSPECIFIED) { 834 if (info.control.vif->active_links) 835 link_id = ffs(info.control.vif->active_links) - 1; 836 else 837 link_id = 0; 838 } 839 840 link = mvmvif->link[link_id]; 841 if (WARN_ON(!link)) 842 return -1; 843 844 if (!ieee80211_is_data(hdr->frame_control)) 845 sta_id = link->bcast_sta.sta_id; 846 else 847 sta_id = link->mcast_sta.sta_id; 848 849 queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info, 850 skb); 851 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 852 queue = mvm->snif_queue; 853 sta_id = mvm->snif_sta.sta_id; 854 } 855 } 856 857 if (queue < 0) { 858 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 859 return -1; 860 } 861 862 if (unlikely(ieee80211_is_probe_resp(fc))) 863 iwl_mvm_probe_resp_set_noa(mvm, skb); 864 865 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 866 867 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id, 868 NULL); 869 if (!dev_cmd) 870 return -1; 871 872 /* From now on, we cannot access info->control */ 873 iwl_mvm_skb_prepare_status(skb, dev_cmd); 874 875 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 876 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 877 return -1; 878 } 879 880 return 0; 881 } 882 883 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 884 struct ieee80211_sta *sta, unsigned int tid) 885 { 886 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 887 u8 ac = tid_to_mac80211_ac[tid]; 888 enum nl80211_band band; 889 unsigned int txf; 890 unsigned int val; 891 int lmac; 892 893 /* For HE redirect to trigger based fifos */ 894 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 895 ac += 4; 896 897 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 898 899 /* 900 * Don't send an AMSDU that will be longer than the TXF. 901 * Add a security margin of 256 for the TX command + headers. 902 * We also want to have the start of the next packet inside the 903 * fifo to be able to send bursts. 904 */ 905 val = mvmsta->max_amsdu_len; 906 907 if (hweight16(sta->valid_links) <= 1) { 908 if (sta->valid_links) { 909 struct ieee80211_bss_conf *link_conf; 910 unsigned int link = ffs(sta->valid_links) - 1; 911 912 rcu_read_lock(); 913 link_conf = rcu_dereference(mvmsta->vif->link_conf[link]); 914 if (WARN_ON(!link_conf)) 915 band = NL80211_BAND_2GHZ; 916 else 917 band = link_conf->chanreq.oper.chan->band; 918 rcu_read_unlock(); 919 } else { 920 band = mvmsta->vif->bss_conf.chanreq.oper.chan->band; 921 } 922 923 lmac = iwl_mvm_get_lmac_id(mvm, band); 924 } else if (fw_has_capa(&mvm->fw->ucode_capa, 925 IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) { 926 /* for real MLO restrict to both LMACs if they exist */ 927 lmac = IWL_LMAC_5G_INDEX; 928 val = min_t(unsigned int, val, 929 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 930 lmac = IWL_LMAC_24G_INDEX; 931 } else { 932 lmac = IWL_LMAC_24G_INDEX; 933 } 934 935 return min_t(unsigned int, val, 936 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 937 } 938 939 #ifdef CONFIG_INET 940 941 static int 942 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 943 netdev_features_t netdev_flags, 944 struct sk_buff_head *mpdus_skb) 945 { 946 struct sk_buff *tmp, *next; 947 struct ieee80211_hdr *hdr = (void *)skb->data; 948 char cb[sizeof(skb->cb)]; 949 u16 i = 0; 950 unsigned int tcp_payload_len; 951 unsigned int mss = skb_shinfo(skb)->gso_size; 952 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 953 bool qos = ieee80211_is_data_qos(hdr->frame_control); 954 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 955 956 skb_shinfo(skb)->gso_size = num_subframes * mss; 957 memcpy(cb, skb->cb, sizeof(cb)); 958 959 next = skb_gso_segment(skb, netdev_flags); 960 skb_shinfo(skb)->gso_size = mss; 961 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 962 963 if (IS_ERR(next) && PTR_ERR(next) == -ENOMEM) 964 return -ENOMEM; 965 966 if (WARN_ONCE(IS_ERR(next), 967 "skb_gso_segment error: %d\n", (int)PTR_ERR(next))) 968 return PTR_ERR(next); 969 970 if (next) 971 consume_skb(skb); 972 973 skb_list_walk_safe(next, tmp, next) { 974 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 975 /* 976 * Compute the length of all the data added for the A-MSDU. 977 * This will be used to compute the length to write in the TX 978 * command. We have: SNAP + IP + TCP for n -1 subframes and 979 * ETH header for n subframes. 980 */ 981 tcp_payload_len = skb_tail_pointer(tmp) - 982 skb_transport_header(tmp) - 983 tcp_hdrlen(tmp) + tmp->data_len; 984 985 if (ipv4) 986 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 987 988 if (tcp_payload_len > mss) { 989 skb_shinfo(tmp)->gso_size = mss; 990 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 : 991 SKB_GSO_TCPV6; 992 } else { 993 if (qos) { 994 u8 *qc; 995 996 if (ipv4) 997 ip_send_check(ip_hdr(tmp)); 998 999 qc = ieee80211_get_qos_ctl((void *)tmp->data); 1000 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1001 } 1002 skb_shinfo(tmp)->gso_size = 0; 1003 } 1004 1005 skb_mark_not_on_list(tmp); 1006 __skb_queue_tail(mpdus_skb, tmp); 1007 i++; 1008 } 1009 1010 return 0; 1011 } 1012 1013 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 1014 struct ieee80211_tx_info *info, 1015 struct ieee80211_sta *sta, 1016 struct sk_buff_head *mpdus_skb) 1017 { 1018 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1019 struct ieee80211_hdr *hdr = (void *)skb->data; 1020 unsigned int mss = skb_shinfo(skb)->gso_size; 1021 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 1022 u16 snap_ip_tcp, pad; 1023 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 1024 u8 tid; 1025 1026 snap_ip_tcp = 8 + skb_network_header_len(skb) + tcp_hdrlen(skb); 1027 1028 if (!mvmsta->max_amsdu_len || 1029 !ieee80211_is_data_qos(hdr->frame_control) || 1030 !mvmsta->amsdu_enabled) 1031 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 1032 1033 /* 1034 * Do not build AMSDU for IPv6 with extension headers. 1035 * ask stack to segment and checkum the generated MPDUs for us. 1036 */ 1037 if (skb->protocol == htons(ETH_P_IPV6) && 1038 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 1039 IPPROTO_TCP) { 1040 netdev_flags &= ~NETIF_F_CSUM_MASK; 1041 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 1042 } 1043 1044 tid = ieee80211_get_tid(hdr); 1045 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 1046 return -EINVAL; 1047 1048 /* 1049 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 1050 * during an BA session. 1051 */ 1052 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 1053 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 1054 !(mvmsta->amsdu_enabled & BIT(tid))) 1055 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 1056 1057 /* 1058 * Take the min of ieee80211 station and mvm station 1059 */ 1060 max_amsdu_len = 1061 min_t(unsigned int, sta->cur->max_amsdu_len, 1062 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 1063 1064 /* 1065 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 1066 * supported. This is a spec requirement (IEEE 802.11-2015 1067 * section 8.7.3 NOTE 3). 1068 */ 1069 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1070 !sta->deflink.vht_cap.vht_supported) 1071 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 1072 1073 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 1074 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 1075 pad = (4 - subf_len) & 0x3; 1076 1077 /* 1078 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 1079 * N * subf_len + (N - 1) * pad. 1080 */ 1081 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 1082 1083 if (sta->max_amsdu_subframes && 1084 num_subframes > sta->max_amsdu_subframes) 1085 num_subframes = sta->max_amsdu_subframes; 1086 1087 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1088 tcp_hdrlen(skb) + skb->data_len; 1089 1090 /* 1091 * Make sure we have enough TBs for the A-MSDU: 1092 * 2 for each subframe 1093 * 1 more for each fragment 1094 * 1 more for the potential data in the header 1095 */ 1096 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 1097 mvm->trans->max_skb_frags) 1098 num_subframes = 1; 1099 1100 if (num_subframes > 1) 1101 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1102 1103 /* This skb fits in one single A-MSDU */ 1104 if (num_subframes * mss >= tcp_payload_len) { 1105 __skb_queue_tail(mpdus_skb, skb); 1106 return 0; 1107 } 1108 1109 /* 1110 * Trick the segmentation function to make it 1111 * create SKBs that can fit into one A-MSDU. 1112 */ 1113 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 1114 mpdus_skb); 1115 } 1116 #else /* CONFIG_INET */ 1117 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 1118 struct ieee80211_tx_info *info, 1119 struct ieee80211_sta *sta, 1120 struct sk_buff_head *mpdus_skb) 1121 { 1122 /* Impossible to get TSO with CONFIG_INET */ 1123 WARN_ON(1); 1124 1125 return -1; 1126 } 1127 #endif 1128 1129 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1130 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1131 { 1132 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1133 unsigned long now = jiffies; 1134 int tid; 1135 1136 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1137 return false; 1138 1139 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1140 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1141 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1142 return true; 1143 } 1144 1145 return false; 1146 } 1147 1148 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1149 struct iwl_mvm_sta *mvmsta, 1150 int airtime) 1151 { 1152 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1153 struct iwl_mvm_tcm_mac *mdata; 1154 1155 if (mac >= NUM_MAC_INDEX_DRIVER) 1156 return; 1157 1158 mdata = &mvm->tcm.data[mac]; 1159 1160 if (mvm->tcm.paused) 1161 return; 1162 1163 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1164 schedule_delayed_work(&mvm->tcm.work, 0); 1165 1166 mdata->tx.airtime += airtime; 1167 } 1168 1169 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1170 struct iwl_mvm_sta *mvmsta, int tid) 1171 { 1172 u32 ac = tid_to_mac80211_ac[tid]; 1173 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1174 struct iwl_mvm_tcm_mac *mdata; 1175 1176 if (mac >= NUM_MAC_INDEX_DRIVER) 1177 return -EINVAL; 1178 1179 mdata = &mvm->tcm.data[mac]; 1180 1181 mdata->tx.pkts[ac]++; 1182 1183 return 0; 1184 } 1185 1186 /* 1187 * Sets the fields in the Tx cmd that are crypto related. 1188 * 1189 * This function must be called with BHs disabled. 1190 */ 1191 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1192 struct ieee80211_tx_info *info, 1193 struct ieee80211_sta *sta, 1194 const u8 *addr3_override) 1195 { 1196 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1197 struct iwl_mvm_sta *mvmsta; 1198 struct iwl_device_tx_cmd *dev_cmd; 1199 __le16 fc; 1200 u16 seq_number = 0; 1201 u8 tid = IWL_MAX_TID_COUNT; 1202 u16 txq_id; 1203 bool is_ampdu = false; 1204 int hdrlen; 1205 1206 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1207 fc = hdr->frame_control; 1208 hdrlen = ieee80211_hdrlen(fc); 1209 1210 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1211 return -1; 1212 1213 if (WARN_ON_ONCE(!mvmsta)) 1214 return -1; 1215 1216 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1217 return -1; 1218 1219 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he) 1220 return -1; 1221 1222 if (unlikely(ieee80211_is_probe_resp(fc))) 1223 iwl_mvm_probe_resp_set_noa(mvm, skb); 1224 1225 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1226 sta, mvmsta->deflink.sta_id, 1227 addr3_override); 1228 if (!dev_cmd) 1229 goto drop; 1230 1231 /* 1232 * we handle that entirely ourselves -- for uAPSD the firmware 1233 * will always send a notification, and for PS-Poll responses 1234 * we'll notify mac80211 when getting frame status 1235 */ 1236 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1237 1238 spin_lock(&mvmsta->lock); 1239 1240 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1241 * the conditions of !ieee80211_is_qos_nullfunc(fc) and 1242 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID 1243 */ 1244 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1245 tid = ieee80211_get_tid(hdr); 1246 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1247 goto drop_unlock_sta; 1248 1249 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1250 if (WARN_ONCE(is_ampdu && 1251 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1252 "Invalid internal agg state %d for TID %d", 1253 mvmsta->tid_data[tid].state, tid)) 1254 goto drop_unlock_sta; 1255 1256 seq_number = mvmsta->tid_data[tid].seq_number; 1257 seq_number &= IEEE80211_SCTL_SEQ; 1258 1259 if (!iwl_mvm_has_new_tx_api(mvm)) { 1260 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1261 1262 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1263 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1264 /* update the tx_cmd hdr as it was already copied */ 1265 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1266 } 1267 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) && 1268 !ieee80211_is_nullfunc(fc)) { 1269 tid = IWL_TID_NON_QOS; 1270 } 1271 1272 txq_id = mvmsta->tid_data[tid].txq_id; 1273 1274 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1275 1276 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1277 #if defined(__FreeBSD__) 1278 printf("%s:%d: fc %#06x tid %u txq_id %u mvm %p " 1279 "skb %p { len %u } info %p sta %p (if you see this please " 1280 "report to PR 274382)\n", __func__, __LINE__, 1281 fc, tid, txq_id, mvm, skb, skb->len, info, sta); 1282 #endif 1283 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1284 spin_unlock(&mvmsta->lock); 1285 return -1; 1286 } 1287 1288 if (!iwl_mvm_has_new_tx_api(mvm)) { 1289 /* Keep track of the time of the last frame for this RA/TID */ 1290 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1291 1292 /* 1293 * If we have timed-out TIDs - schedule the worker that will 1294 * reconfig the queues and update them 1295 * 1296 * Note that the no lock is taken here in order to not serialize 1297 * the TX flow. This isn't dangerous because scheduling 1298 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1299 * schedule it due to some race condition then next TX we get 1300 * here we will. 1301 */ 1302 if (unlikely(mvm->queue_info[txq_id].status == 1303 IWL_MVM_QUEUE_SHARED && 1304 iwl_mvm_txq_should_update(mvm, txq_id))) 1305 schedule_work(&mvm->add_stream_wk); 1306 } 1307 1308 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1309 mvmsta->deflink.sta_id, tid, txq_id, 1310 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1311 1312 /* From now on, we cannot access info->control */ 1313 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1314 1315 /* 1316 * The IV is introduced by the HW for new tx api, and it is not present 1317 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the 1318 * IV for those devices. 1319 */ 1320 if (ieee80211_is_data(fc)) 1321 iwl_mvm_mei_tx_copy_to_csme(mvm, skb, 1322 info->control.hw_key && 1323 !iwl_mvm_has_new_tx_api(mvm) ? 1324 info->control.hw_key->iv_len : 0); 1325 1326 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1327 goto drop_unlock_sta; 1328 1329 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1330 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1331 1332 spin_unlock(&mvmsta->lock); 1333 1334 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1335 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1336 goto drop; 1337 1338 return 0; 1339 1340 drop_unlock_sta: 1341 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1342 spin_unlock(&mvmsta->lock); 1343 drop: 1344 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id, 1345 tid); 1346 return -1; 1347 } 1348 1349 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1350 struct ieee80211_sta *sta) 1351 { 1352 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1353 struct ieee80211_tx_info info; 1354 struct sk_buff_head mpdus_skbs; 1355 struct ieee80211_vif *vif; 1356 unsigned int payload_len; 1357 int ret; 1358 struct sk_buff *orig_skb = skb; 1359 const u8 *addr3; 1360 1361 if (WARN_ON_ONCE(!mvmsta)) 1362 return -1; 1363 1364 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1365 return -1; 1366 1367 memcpy(&info, skb->cb, sizeof(info)); 1368 1369 if (!skb_is_gso(skb)) 1370 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL); 1371 1372 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1373 tcp_hdrlen(skb) + skb->data_len; 1374 1375 if (payload_len <= skb_shinfo(skb)->gso_size) 1376 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL); 1377 1378 __skb_queue_head_init(&mpdus_skbs); 1379 1380 vif = info.control.vif; 1381 if (!vif) 1382 return -1; 1383 1384 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1385 if (ret) 1386 return ret; 1387 1388 WARN_ON(skb_queue_empty(&mpdus_skbs)); 1389 1390 /* 1391 * As described in IEEE sta 802.11-2020, table 9-30 (Address 1392 * field contents), A-MSDU address 3 should contain the BSSID 1393 * address. 1394 * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it 1395 * in the command header. We need to preserve the original 1396 * address 3 in the skb header to correctly create all the 1397 * A-MSDU subframe headers from it. 1398 */ 1399 switch (vif->type) { 1400 case NL80211_IFTYPE_STATION: 1401 addr3 = vif->cfg.ap_addr; 1402 break; 1403 case NL80211_IFTYPE_AP: 1404 addr3 = vif->addr; 1405 break; 1406 default: 1407 addr3 = NULL; 1408 break; 1409 } 1410 1411 while (!skb_queue_empty(&mpdus_skbs)) { 1412 struct ieee80211_hdr *hdr; 1413 bool amsdu; 1414 1415 skb = __skb_dequeue(&mpdus_skbs); 1416 hdr = (void *)skb->data; 1417 amsdu = ieee80211_is_data_qos(hdr->frame_control) && 1418 (*ieee80211_get_qos_ctl(hdr) & 1419 IEEE80211_QOS_CTL_A_MSDU_PRESENT); 1420 1421 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta, 1422 amsdu ? addr3 : NULL); 1423 if (ret) { 1424 /* Free skbs created as part of TSO logic that have not yet been dequeued */ 1425 __skb_queue_purge(&mpdus_skbs); 1426 /* skb here is not necessarily same as skb that entered this method, 1427 * so free it explicitly. 1428 */ 1429 if (skb == orig_skb) 1430 ieee80211_free_txskb(mvm->hw, skb); 1431 else 1432 kfree_skb(skb); 1433 /* there was error, but we consumed skb one way or another, so return 0 */ 1434 return 0; 1435 } 1436 } 1437 1438 return 0; 1439 } 1440 1441 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1442 struct ieee80211_sta *sta, u8 tid) 1443 { 1444 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1445 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1446 struct ieee80211_vif *vif = mvmsta->vif; 1447 u16 normalized_ssn; 1448 1449 lockdep_assert_held(&mvmsta->lock); 1450 1451 if ((tid_data->state == IWL_AGG_ON || 1452 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1453 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1454 /* 1455 * Now that this aggregation or DQA queue is empty tell 1456 * mac80211 so it knows we no longer have frames buffered for 1457 * the station on this TID (for the TIM bitmap calculation.) 1458 */ 1459 ieee80211_sta_set_buffered(sta, tid, false); 1460 } 1461 1462 /* 1463 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1464 * to align the wrap around of ssn so we compare relevant values. 1465 */ 1466 normalized_ssn = tid_data->ssn; 1467 if (mvm->trans->trans_cfg->gen2) 1468 normalized_ssn &= 0xff; 1469 1470 if (normalized_ssn != tid_data->next_reclaimed) 1471 return; 1472 1473 switch (tid_data->state) { 1474 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1475 IWL_DEBUG_TX_QUEUES(mvm, 1476 "Can continue addBA flow ssn = next_recl = %d\n", 1477 tid_data->next_reclaimed); 1478 tid_data->state = IWL_AGG_STARTING; 1479 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1480 break; 1481 1482 case IWL_EMPTYING_HW_QUEUE_DELBA: 1483 IWL_DEBUG_TX_QUEUES(mvm, 1484 "Can continue DELBA flow ssn = next_recl = %d\n", 1485 tid_data->next_reclaimed); 1486 tid_data->state = IWL_AGG_OFF; 1487 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1488 break; 1489 1490 default: 1491 break; 1492 } 1493 } 1494 1495 #ifdef CONFIG_IWLWIFI_DEBUG 1496 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1497 { 1498 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1499 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1500 1501 switch (status & TX_STATUS_MSK) { 1502 case TX_STATUS_SUCCESS: 1503 return "SUCCESS"; 1504 TX_STATUS_POSTPONE(DELAY); 1505 TX_STATUS_POSTPONE(FEW_BYTES); 1506 TX_STATUS_POSTPONE(BT_PRIO); 1507 TX_STATUS_POSTPONE(QUIET_PERIOD); 1508 TX_STATUS_POSTPONE(CALC_TTAK); 1509 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1510 TX_STATUS_FAIL(SHORT_LIMIT); 1511 TX_STATUS_FAIL(LONG_LIMIT); 1512 TX_STATUS_FAIL(UNDERRUN); 1513 TX_STATUS_FAIL(DRAIN_FLOW); 1514 TX_STATUS_FAIL(RFKILL_FLUSH); 1515 TX_STATUS_FAIL(LIFE_EXPIRE); 1516 TX_STATUS_FAIL(DEST_PS); 1517 TX_STATUS_FAIL(HOST_ABORTED); 1518 TX_STATUS_FAIL(BT_RETRY); 1519 TX_STATUS_FAIL(STA_INVALID); 1520 TX_STATUS_FAIL(FRAG_DROPPED); 1521 TX_STATUS_FAIL(TID_DISABLE); 1522 TX_STATUS_FAIL(FIFO_FLUSHED); 1523 TX_STATUS_FAIL(SMALL_CF_POLL); 1524 TX_STATUS_FAIL(FW_DROP); 1525 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1526 } 1527 1528 return "UNKNOWN"; 1529 1530 #undef TX_STATUS_FAIL 1531 #undef TX_STATUS_POSTPONE 1532 } 1533 #endif /* CONFIG_IWLWIFI_DEBUG */ 1534 1535 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1536 { 1537 switch (chan_width) { 1538 case RATE_MCS_CHAN_WIDTH_20: 1539 return 0; 1540 case RATE_MCS_CHAN_WIDTH_40: 1541 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1542 case RATE_MCS_CHAN_WIDTH_80: 1543 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1544 case RATE_MCS_CHAN_WIDTH_160: 1545 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1546 default: 1547 return 0; 1548 } 1549 } 1550 1551 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1552 enum nl80211_band band, 1553 struct ieee80211_tx_rate *r) 1554 { 1555 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1556 u32 rate = format == RATE_MCS_HT_MSK ? 1557 RATE_HT_MCS_INDEX(rate_n_flags) : 1558 rate_n_flags & RATE_MCS_CODE_MSK; 1559 1560 r->flags |= 1561 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1562 RATE_MCS_CHAN_WIDTH_MSK); 1563 1564 if (rate_n_flags & RATE_MCS_SGI_MSK) 1565 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1566 if (format == RATE_MCS_HT_MSK) { 1567 r->flags |= IEEE80211_TX_RC_MCS; 1568 r->idx = rate; 1569 } else if (format == RATE_MCS_VHT_MSK) { 1570 ieee80211_rate_set_vht(r, rate, 1571 FIELD_GET(RATE_MCS_NSS_MSK, 1572 rate_n_flags) + 1); 1573 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1574 } else if (format == RATE_MCS_HE_MSK) { 1575 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1576 * but it only matters for radiotap */ 1577 r->idx = 0; 1578 } else { 1579 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1580 band); 1581 } 1582 } 1583 1584 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags, 1585 enum nl80211_band band, 1586 struct ieee80211_tx_rate *r) 1587 { 1588 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1589 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1590 1591 r->flags |= 1592 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1593 RATE_MCS_CHAN_WIDTH_MSK_V1); 1594 1595 if (rate_n_flags & RATE_MCS_SGI_MSK_V1) 1596 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1597 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 1598 r->flags |= IEEE80211_TX_RC_MCS; 1599 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 1600 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 1601 ieee80211_rate_set_vht( 1602 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1603 FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1); 1604 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1605 } else { 1606 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1607 band); 1608 } 1609 } 1610 1611 /* 1612 * translate ucode response to mac80211 tx status control values 1613 */ 1614 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw, 1615 u32 rate_n_flags, 1616 struct ieee80211_tx_info *info) 1617 { 1618 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1619 1620 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP, 1621 TX_CMD, 0) <= 6) 1622 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1623 1624 info->status.antenna = 1625 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1626 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, 1627 info->band, r); 1628 } 1629 1630 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1631 u32 status, __le16 frame_control) 1632 { 1633 struct iwl_fw_dbg_trigger_tlv *trig; 1634 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1635 int i; 1636 1637 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1638 enum iwl_fw_ini_time_point tp = 1639 IWL_FW_INI_TIME_POINT_TX_FAILED; 1640 1641 if (ieee80211_is_action(frame_control)) 1642 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1643 1644 iwl_dbg_tlv_time_point(&mvm->fwrt, 1645 tp, NULL); 1646 return; 1647 } 1648 1649 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1650 FW_DBG_TRIGGER_TX_STATUS); 1651 if (!trig) 1652 return; 1653 1654 status_trig = (void *)trig->data; 1655 1656 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1657 /* don't collect on status 0 */ 1658 if (!status_trig->statuses[i].status) 1659 break; 1660 1661 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1662 continue; 1663 1664 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1665 "Tx status %d was received", 1666 status & TX_STATUS_MSK); 1667 break; 1668 } 1669 } 1670 1671 /* 1672 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1673 * @tx_resp: the Tx response from the fw (agg or non-agg) 1674 * 1675 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1676 * it can't know that everything will go well until the end of the AMPDU, it 1677 * can't know in advance the number of MPDUs that will be sent in the current 1678 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1679 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1680 * of the batch. This is why the SSN of the SCD is written at the end of the 1681 * whole struct at a variable offset. This function knows how to cope with the 1682 * variable offset and returns the SSN of the SCD. 1683 * 1684 * For 22000-series and lower, this is just 12 bits. For later, 16 bits. 1685 */ 1686 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1687 struct iwl_mvm_tx_resp *tx_resp) 1688 { 1689 u32 val = le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1690 tx_resp->frame_count); 1691 1692 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 1693 return val & 0xFFFF; 1694 return val & 0xFFF; 1695 } 1696 1697 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1698 struct iwl_rx_packet *pkt) 1699 { 1700 struct ieee80211_sta *sta; 1701 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1702 int txq_id = SEQ_TO_QUEUE(sequence); 1703 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1704 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1705 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1706 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1707 struct agg_tx_status *agg_status = 1708 iwl_mvm_get_agg_status(mvm, tx_resp); 1709 u32 status = le16_to_cpu(agg_status->status); 1710 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1711 struct sk_buff_head skbs; 1712 u8 skb_freed = 0; 1713 u8 lq_color; 1714 u16 next_reclaimed, seq_ctl; 1715 bool is_ndp = false; 1716 1717 __skb_queue_head_init(&skbs); 1718 1719 if (iwl_mvm_has_new_tx_api(mvm)) 1720 txq_id = le16_to_cpu(tx_resp->tx_queue); 1721 1722 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1723 1724 /* we can free until ssn % q.n_bd not inclusive */ 1725 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false); 1726 1727 while (!skb_queue_empty(&skbs)) { 1728 struct sk_buff *skb = __skb_dequeue(&skbs); 1729 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1730 struct ieee80211_hdr *hdr = (void *)skb->data; 1731 bool flushed = false; 1732 1733 skb_freed++; 1734 1735 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1736 1737 memset(&info->status, 0, sizeof(info->status)); 1738 info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED); 1739 1740 /* inform mac80211 about what happened with the frame */ 1741 switch (status & TX_STATUS_MSK) { 1742 case TX_STATUS_SUCCESS: 1743 case TX_STATUS_DIRECT_DONE: 1744 info->flags |= IEEE80211_TX_STAT_ACK; 1745 break; 1746 case TX_STATUS_FAIL_FIFO_FLUSHED: 1747 case TX_STATUS_FAIL_DRAIN_FLOW: 1748 flushed = true; 1749 break; 1750 case TX_STATUS_FAIL_DEST_PS: 1751 /* the FW should have stopped the queue and not 1752 * return this status 1753 */ 1754 IWL_ERR_LIMIT(mvm, 1755 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1756 status, le16_to_cpu(hdr->frame_control)); 1757 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1758 break; 1759 default: 1760 break; 1761 } 1762 1763 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1764 ieee80211_is_mgmt(hdr->frame_control)) 1765 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1766 1767 /* 1768 * If we are freeing multiple frames, mark all the frames 1769 * but the first one as acked, since they were acknowledged 1770 * before 1771 * */ 1772 if (skb_freed > 1) 1773 info->flags |= IEEE80211_TX_STAT_ACK; 1774 1775 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1776 1777 info->status.rates[0].count = tx_resp->failure_frame + 1; 1778 1779 iwl_mvm_hwrate_to_tx_status(mvm->fw, 1780 le32_to_cpu(tx_resp->initial_rate), 1781 info); 1782 1783 /* Don't assign the converted initial_rate, because driver 1784 * TLC uses this and doesn't support the new FW rate 1785 */ 1786 info->status.status_driver_data[1] = 1787 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1788 1789 /* Single frame failure in an AMPDU queue => send BAR */ 1790 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1791 !(info->flags & IEEE80211_TX_STAT_ACK) && 1792 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1793 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1794 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1795 1796 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1797 if (ieee80211_is_back_req(hdr->frame_control)) 1798 seq_ctl = 0; 1799 else if (status != TX_STATUS_SUCCESS) 1800 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1801 1802 if (unlikely(!seq_ctl)) { 1803 /* 1804 * If it is an NDP, we can't update next_reclaim since 1805 * its sequence control is 0. Note that for that same 1806 * reason, NDPs are never sent to A-MPDU'able queues 1807 * so that we can never have more than one freed frame 1808 * for a single Tx resonse (see WARN_ON below). 1809 */ 1810 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1811 is_ndp = true; 1812 } 1813 1814 /* 1815 * TODO: this is not accurate if we are freeing more than one 1816 * packet. 1817 */ 1818 info->status.tx_time = 1819 le16_to_cpu(tx_resp->wireless_media_time); 1820 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1821 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1822 info->status.status_driver_data[0] = 1823 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1824 1825 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1))) 1826 ieee80211_tx_status_skb(mvm->hw, skb); 1827 } 1828 1829 /* This is an aggregation queue or might become one, so we use 1830 * the ssn since: ssn = wifi seq_num % 256. 1831 * The seq_ctl is the sequence control of the packet to which 1832 * this Tx response relates. But if there is a hole in the 1833 * bitmap of the BA we received, this Tx response may allow to 1834 * reclaim the hole and all the subsequent packets that were 1835 * already acked. In that case, seq_ctl != ssn, and the next 1836 * packet to be reclaimed will be ssn and not seq_ctl. In that 1837 * case, several packets will be reclaimed even if 1838 * frame_count = 1. 1839 * 1840 * The ssn is the index (% 256) of the latest packet that has 1841 * treated (acked / dropped) + 1. 1842 */ 1843 next_reclaimed = ssn; 1844 1845 IWL_DEBUG_TX_REPLY(mvm, 1846 "TXQ %d status %s (0x%08x)\n", 1847 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1848 1849 IWL_DEBUG_TX_REPLY(mvm, 1850 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1851 le32_to_cpu(tx_resp->initial_rate), 1852 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1853 ssn, next_reclaimed, seq_ctl); 1854 1855 rcu_read_lock(); 1856 1857 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1858 /* 1859 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1860 * the firmware while we still have packets for it in the Tx queues. 1861 */ 1862 if (WARN_ON_ONCE(!sta)) 1863 goto out; 1864 1865 if (!IS_ERR(sta)) { 1866 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1867 1868 iwl_mvm_tx_airtime(mvm, mvmsta, 1869 le16_to_cpu(tx_resp->wireless_media_time)); 1870 1871 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1872 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1873 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1874 1875 if (sta->wme && tid != IWL_MGMT_TID) { 1876 struct iwl_mvm_tid_data *tid_data = 1877 &mvmsta->tid_data[tid]; 1878 bool send_eosp_ndp = false; 1879 1880 spin_lock_bh(&mvmsta->lock); 1881 1882 if (!is_ndp) { 1883 tid_data->next_reclaimed = next_reclaimed; 1884 IWL_DEBUG_TX_REPLY(mvm, 1885 "Next reclaimed packet:%d\n", 1886 next_reclaimed); 1887 iwl_mvm_count_mpdu(mvmsta, sta_id, 1, true, 0); 1888 } else { 1889 IWL_DEBUG_TX_REPLY(mvm, 1890 "NDP - don't update next_reclaimed\n"); 1891 } 1892 1893 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1894 1895 if (mvmsta->sleep_tx_count) { 1896 mvmsta->sleep_tx_count--; 1897 if (mvmsta->sleep_tx_count && 1898 !iwl_mvm_tid_queued(mvm, tid_data)) { 1899 /* 1900 * The number of frames in the queue 1901 * dropped to 0 even if we sent less 1902 * frames than we thought we had on the 1903 * Tx queue. 1904 * This means we had holes in the BA 1905 * window that we just filled, ask 1906 * mac80211 to send EOSP since the 1907 * firmware won't know how to do that. 1908 * Send NDP and the firmware will send 1909 * EOSP notification that will trigger 1910 * a call to ieee80211_sta_eosp(). 1911 */ 1912 send_eosp_ndp = true; 1913 } 1914 } 1915 1916 spin_unlock_bh(&mvmsta->lock); 1917 if (send_eosp_ndp) { 1918 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1919 IEEE80211_FRAME_RELEASE_UAPSD, 1920 1, tid, false, false); 1921 mvmsta->sleep_tx_count = 0; 1922 ieee80211_send_eosp_nullfunc(sta, tid); 1923 } 1924 } 1925 1926 if (mvmsta->next_status_eosp) { 1927 mvmsta->next_status_eosp = false; 1928 ieee80211_sta_eosp(sta); 1929 } 1930 } 1931 out: 1932 rcu_read_unlock(); 1933 } 1934 1935 #ifdef CONFIG_IWLWIFI_DEBUG 1936 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1937 static const char *iwl_get_agg_tx_status(u16 status) 1938 { 1939 switch (status & AGG_TX_STATE_STATUS_MSK) { 1940 AGG_TX_STATE_(TRANSMITTED); 1941 AGG_TX_STATE_(UNDERRUN); 1942 AGG_TX_STATE_(BT_PRIO); 1943 AGG_TX_STATE_(FEW_BYTES); 1944 AGG_TX_STATE_(ABORT); 1945 AGG_TX_STATE_(TX_ON_AIR_DROP); 1946 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1947 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1948 AGG_TX_STATE_(SCD_QUERY); 1949 AGG_TX_STATE_(TEST_BAD_CRC32); 1950 AGG_TX_STATE_(RESPONSE); 1951 AGG_TX_STATE_(DUMP_TX); 1952 AGG_TX_STATE_(DELAY_TX); 1953 } 1954 1955 return "UNKNOWN"; 1956 } 1957 1958 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1959 struct iwl_rx_packet *pkt) 1960 { 1961 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1962 struct agg_tx_status *frame_status = 1963 iwl_mvm_get_agg_status(mvm, tx_resp); 1964 int i; 1965 bool tirgger_timepoint = false; 1966 1967 for (i = 0; i < tx_resp->frame_count; i++) { 1968 u16 fstatus = le16_to_cpu(frame_status[i].status); 1969 /* In case one frame wasn't transmitted trigger time point */ 1970 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1971 AGG_TX_STATE_TRANSMITTED); 1972 IWL_DEBUG_TX_REPLY(mvm, 1973 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1974 iwl_get_agg_tx_status(fstatus), 1975 fstatus & AGG_TX_STATE_STATUS_MSK, 1976 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1977 AGG_TX_STATE_TRY_CNT_POS, 1978 le16_to_cpu(frame_status[i].sequence)); 1979 } 1980 1981 if (tirgger_timepoint) 1982 iwl_dbg_tlv_time_point(&mvm->fwrt, 1983 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1984 1985 } 1986 #else 1987 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1988 struct iwl_rx_packet *pkt) 1989 {} 1990 #endif /* CONFIG_IWLWIFI_DEBUG */ 1991 1992 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1993 struct iwl_rx_packet *pkt) 1994 { 1995 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1996 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1997 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1998 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1999 struct iwl_mvm_sta *mvmsta; 2000 int queue = SEQ_TO_QUEUE(sequence); 2001 struct ieee80211_sta *sta; 2002 2003 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 2004 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 2005 return; 2006 2007 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 2008 2009 rcu_read_lock(); 2010 2011 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2012 2013 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 2014 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) { 2015 rcu_read_unlock(); 2016 return; 2017 } 2018 2019 if (!WARN_ON_ONCE(!mvmsta)) { 2020 mvmsta->tid_data[tid].rate_n_flags = 2021 le32_to_cpu(tx_resp->initial_rate); 2022 mvmsta->tid_data[tid].tx_time = 2023 le16_to_cpu(tx_resp->wireless_media_time); 2024 mvmsta->tid_data[tid].lq_color = 2025 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 2026 iwl_mvm_tx_airtime(mvm, mvmsta, 2027 le16_to_cpu(tx_resp->wireless_media_time)); 2028 } 2029 2030 rcu_read_unlock(); 2031 } 2032 2033 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2034 { 2035 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2036 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 2037 2038 if (tx_resp->frame_count == 1) 2039 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 2040 else 2041 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 2042 } 2043 2044 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 2045 int txq, int index, 2046 struct ieee80211_tx_info *tx_info, u32 rate, 2047 bool is_flush) 2048 { 2049 struct sk_buff_head reclaimed_skbs; 2050 struct iwl_mvm_tid_data *tid_data = NULL; 2051 struct ieee80211_sta *sta; 2052 struct iwl_mvm_sta *mvmsta = NULL; 2053 struct sk_buff *skb; 2054 int freed; 2055 2056 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 2057 tid > IWL_MAX_TID_COUNT, 2058 "sta_id %d tid %d", sta_id, tid)) 2059 return; 2060 2061 rcu_read_lock(); 2062 2063 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 2064 2065 /* Reclaiming frames for a station that has been deleted ? */ 2066 if (WARN_ON_ONCE(!sta)) { 2067 rcu_read_unlock(); 2068 return; 2069 } 2070 2071 __skb_queue_head_init(&reclaimed_skbs); 2072 2073 /* 2074 * Release all TFDs before the SSN, i.e. all TFDs in front of 2075 * block-ack window (we assume that they've been successfully 2076 * transmitted ... if not, it's too late anyway). 2077 */ 2078 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush); 2079 2080 skb_queue_walk(&reclaimed_skbs, skb) { 2081 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2082 2083 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 2084 2085 memset(&info->status, 0, sizeof(info->status)); 2086 /* Packet was transmitted successfully, failures come as single 2087 * frames because before failing a frame the firmware transmits 2088 * it without aggregation at least once. 2089 */ 2090 if (!is_flush) 2091 info->flags |= IEEE80211_TX_STAT_ACK; 2092 else 2093 info->flags &= ~IEEE80211_TX_STAT_ACK; 2094 } 2095 2096 /* 2097 * It's possible to get a BA response after invalidating the rcu (rcu is 2098 * invalidated in order to prevent new Tx from being sent, but there may 2099 * be some frames already in-flight). 2100 * In this case we just want to reclaim, and could skip all the 2101 * sta-dependent stuff since it's in the middle of being removed 2102 * anyways. 2103 */ 2104 if (IS_ERR(sta)) 2105 goto out; 2106 2107 mvmsta = iwl_mvm_sta_from_mac80211(sta); 2108 tid_data = &mvmsta->tid_data[tid]; 2109 2110 if (tid_data->txq_id != txq) { 2111 IWL_ERR(mvm, 2112 "invalid reclaim request: Q %d, tid %d\n", 2113 tid_data->txq_id, tid); 2114 rcu_read_unlock(); 2115 return; 2116 } 2117 2118 spin_lock_bh(&mvmsta->lock); 2119 2120 tid_data->next_reclaimed = index; 2121 2122 iwl_mvm_check_ratid_empty(mvm, sta, tid); 2123 2124 freed = 0; 2125 2126 /* pack lq color from tid_data along the reduced txp */ 2127 tx_info->status.status_driver_data[0] = 2128 RS_DRV_DATA_PACK(tid_data->lq_color, 2129 tx_info->status.status_driver_data[0]); 2130 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 2131 2132 skb_queue_walk(&reclaimed_skbs, skb) { 2133 struct ieee80211_hdr *hdr = (void *)skb->data; 2134 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2135 2136 if (!is_flush) { 2137 if (ieee80211_is_data_qos(hdr->frame_control)) 2138 freed++; 2139 else 2140 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 2141 } 2142 2143 /* this is the first skb we deliver in this batch */ 2144 /* put the rate scaling data there */ 2145 if (freed == 1) { 2146 info->flags |= IEEE80211_TX_STAT_AMPDU; 2147 memcpy(&info->status, &tx_info->status, 2148 sizeof(tx_info->status)); 2149 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info); 2150 } 2151 } 2152 2153 spin_unlock_bh(&mvmsta->lock); 2154 2155 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 2156 * possible (i.e. first MPDU in the aggregation wasn't acked) 2157 * Still it's important to update RS about sent vs. acked. 2158 */ 2159 if (!is_flush && skb_queue_empty(&reclaimed_skbs) && 2160 !iwl_mvm_has_tlc_offload(mvm)) { 2161 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 2162 2163 /* no TLC offload, so non-MLD mode */ 2164 if (mvmsta->vif) 2165 chanctx_conf = 2166 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf); 2167 2168 if (WARN_ON_ONCE(!chanctx_conf)) 2169 goto out; 2170 2171 tx_info->band = chanctx_conf->def.chan->band; 2172 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info); 2173 2174 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 2175 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 2176 } 2177 2178 out: 2179 rcu_read_unlock(); 2180 2181 while (!skb_queue_empty(&reclaimed_skbs)) { 2182 skb = __skb_dequeue(&reclaimed_skbs); 2183 ieee80211_tx_status_skb(mvm->hw, skb); 2184 } 2185 } 2186 2187 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2188 { 2189 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2190 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 2191 int sta_id, tid, txq, index; 2192 struct ieee80211_tx_info ba_info = {}; 2193 struct iwl_mvm_ba_notif *ba_notif; 2194 struct iwl_mvm_tid_data *tid_data; 2195 struct iwl_mvm_sta *mvmsta; 2196 2197 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 2198 2199 if (iwl_mvm_has_new_tx_api(mvm)) { 2200 struct iwl_mvm_compressed_ba_notif *ba_res = 2201 (void *)pkt->data; 2202 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 2203 u16 tfd_cnt; 2204 int i; 2205 2206 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len, 2207 "short BA notification (%d)\n", pkt_len)) 2208 return; 2209 2210 sta_id = ba_res->sta_id; 2211 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 2212 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 2213 ba_info.status.tx_time = 2214 (u16)le32_to_cpu(ba_res->wireless_time); 2215 ba_info.status.status_driver_data[0] = 2216 (void *)(uintptr_t)ba_res->reduced_txp; 2217 2218 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 2219 if (!tfd_cnt) 2220 return; 2221 2222 if (IWL_FW_CHECK(mvm, 2223 struct_size(ba_res, tfd, tfd_cnt) > pkt_len, 2224 "short BA notification (tfds:%d, size:%d)\n", 2225 tfd_cnt, pkt_len)) 2226 return; 2227 2228 IWL_DEBUG_TX_REPLY(mvm, 2229 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2230 sta_id, le32_to_cpu(ba_res->flags), 2231 le16_to_cpu(ba_res->txed), 2232 le16_to_cpu(ba_res->done)); 2233 2234 rcu_read_lock(); 2235 2236 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2237 /* 2238 * It's possible to get a BA response after invalidating the rcu 2239 * (rcu is invalidated in order to prevent new Tx from being 2240 * sent, but there may be some frames already in-flight). 2241 * In this case we just want to reclaim, and could skip all the 2242 * sta-dependent stuff since it's in the middle of being removed 2243 * anyways. 2244 */ 2245 2246 /* Free per TID */ 2247 for (i = 0; i < tfd_cnt; i++) { 2248 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 2249 &ba_res->tfd[i]; 2250 2251 tid = ba_tfd->tid; 2252 if (tid == IWL_MGMT_TID) 2253 tid = IWL_MAX_TID_COUNT; 2254 2255 if (mvmsta) 2256 mvmsta->tid_data[i].lq_color = lq_color; 2257 2258 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 2259 (int)(le16_to_cpu(ba_tfd->q_num)), 2260 le16_to_cpu(ba_tfd->tfd_index), 2261 &ba_info, 2262 le32_to_cpu(ba_res->tx_rate), false); 2263 } 2264 2265 if (mvmsta) { 2266 iwl_mvm_tx_airtime(mvm, mvmsta, 2267 le32_to_cpu(ba_res->wireless_time)); 2268 2269 iwl_mvm_count_mpdu(mvmsta, sta_id, 2270 le16_to_cpu(ba_res->txed), true, 0); 2271 } 2272 rcu_read_unlock(); 2273 return; 2274 } 2275 2276 ba_notif = (void *)pkt->data; 2277 sta_id = ba_notif->sta_id; 2278 tid = ba_notif->tid; 2279 /* "flow" corresponds to Tx queue */ 2280 txq = le16_to_cpu(ba_notif->scd_flow); 2281 /* "ssn" is start of block-ack Tx window, corresponds to index 2282 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2283 index = le16_to_cpu(ba_notif->scd_ssn); 2284 2285 rcu_read_lock(); 2286 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2287 if (IWL_FW_CHECK(mvm, !mvmsta, 2288 "invalid STA ID %d in BA notif\n", 2289 sta_id)) { 2290 rcu_read_unlock(); 2291 return; 2292 } 2293 2294 tid_data = &mvmsta->tid_data[tid]; 2295 2296 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2297 ba_info.status.ampdu_len = ba_notif->txed; 2298 ba_info.status.tx_time = tid_data->tx_time; 2299 ba_info.status.status_driver_data[0] = 2300 (void *)(uintptr_t)ba_notif->reduced_txp; 2301 2302 rcu_read_unlock(); 2303 2304 IWL_DEBUG_TX_REPLY(mvm, 2305 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2306 ba_notif->sta_addr, ba_notif->sta_id); 2307 2308 IWL_DEBUG_TX_REPLY(mvm, 2309 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2310 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2311 le64_to_cpu(ba_notif->bitmap), txq, index, 2312 ba_notif->txed, ba_notif->txed_2_done); 2313 2314 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2315 ba_notif->reduced_txp); 2316 2317 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2318 tid_data->rate_n_flags, false); 2319 } 2320 2321 /* 2322 * Note that there are transports that buffer frames before they reach 2323 * the firmware. This means that after flush_tx_path is called, the 2324 * queue might not be empty. The race-free way to handle this is to: 2325 * 1) set the station as draining 2326 * 2) flush the Tx path 2327 * 3) wait for the transport queues to be empty 2328 */ 2329 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2330 { 2331 int ret; 2332 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2333 .queues_ctl = cpu_to_le32(tfd_msk), 2334 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2335 }; 2336 2337 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2338 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2339 sizeof(flush_cmd), &flush_cmd); 2340 if (ret) 2341 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2342 return ret; 2343 } 2344 2345 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2346 { 2347 int ret; 2348 struct iwl_tx_path_flush_cmd_rsp *rsp; 2349 struct iwl_tx_path_flush_cmd flush_cmd = { 2350 .sta_id = cpu_to_le32(sta_id), 2351 .tid_mask = cpu_to_le16(tids), 2352 }; 2353 2354 struct iwl_host_cmd cmd = { 2355 .id = TXPATH_FLUSH, 2356 .len = { sizeof(flush_cmd), }, 2357 .data = { &flush_cmd, }, 2358 }; 2359 2360 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2361 2362 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2363 cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL; 2364 2365 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2366 sta_id, tids); 2367 2368 ret = iwl_mvm_send_cmd(mvm, &cmd); 2369 2370 if (ret) { 2371 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2372 return ret; 2373 } 2374 2375 if (cmd.flags & CMD_WANT_SKB) { 2376 int i; 2377 int num_flushed_queues; 2378 2379 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2380 ret = -EIO; 2381 goto free_rsp; 2382 } 2383 2384 rsp = (void *)cmd.resp_pkt->data; 2385 2386 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2387 "sta_id %d != rsp_sta_id %d", 2388 sta_id, le16_to_cpu(rsp->sta_id))) { 2389 ret = -EIO; 2390 goto free_rsp; 2391 } 2392 2393 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2394 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2395 "num_flushed_queues %d", num_flushed_queues)) { 2396 ret = -EIO; 2397 goto free_rsp; 2398 } 2399 2400 for (i = 0; i < num_flushed_queues; i++) { 2401 struct ieee80211_tx_info tx_info = {}; 2402 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2403 int tid = le16_to_cpu(queue_info->tid); 2404 int read_before = le16_to_cpu(queue_info->read_before_flush); 2405 int read_after = le16_to_cpu(queue_info->read_after_flush); 2406 int queue_num = le16_to_cpu(queue_info->queue_num); 2407 2408 if (tid == IWL_MGMT_TID) 2409 tid = IWL_MAX_TID_COUNT; 2410 2411 IWL_DEBUG_TX_QUEUES(mvm, 2412 "tid %d queue_id %d read-before %d read-after %d\n", 2413 tid, queue_num, read_before, read_after); 2414 2415 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2416 &tx_info, 0, true); 2417 } 2418 free_rsp: 2419 iwl_free_resp(&cmd); 2420 } 2421 return ret; 2422 } 2423 2424 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask) 2425 { 2426 if (iwl_mvm_has_new_tx_api(mvm)) 2427 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff); 2428 2429 return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask); 2430 } 2431