1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2025 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH 6 */ 7 #include <linux/ieee80211.h> 8 #include <linux/etherdevice.h> 9 #include <linux/tcp.h> 10 #include <net/gso.h> 11 #include <net/ip.h> 12 #include <net/ipv6.h> 13 14 #include "iwl-trans.h" 15 #include "iwl-nvm-utils.h" 16 #include "iwl-utils.h" 17 #include "mvm.h" 18 #include "sta.h" 19 #include "time-sync.h" 20 21 static void 22 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 23 u16 tid, u16 ssn) 24 { 25 struct iwl_fw_dbg_trigger_tlv *trig; 26 struct iwl_fw_dbg_trigger_ba *ba_trig; 27 28 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA); 29 if (!trig) 30 return; 31 32 ba_trig = (void *)trig->data; 33 34 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 35 return; 36 37 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 38 "BAR sent to %pM, tid %d, ssn %d", 39 addr, tid, ssn); 40 } 41 42 #define OPT_HDR(type, skb, off) \ 43 (type *)(skb_network_header(skb) + (off)) 44 45 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 46 struct ieee80211_tx_info *info, 47 bool amsdu) 48 { 49 struct ieee80211_hdr *hdr = (void *)skb->data; 50 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 51 u16 offload_assist = 0; 52 #if IS_ENABLED(CONFIG_INET) 53 u8 protocol = 0; 54 55 /* Do not compute checksum if already computed */ 56 if (skb->ip_summed != CHECKSUM_PARTIAL) 57 goto out; 58 59 /* We do not expect to be requested to csum stuff we do not support */ 60 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 61 (skb->protocol != htons(ETH_P_IP) && 62 skb->protocol != htons(ETH_P_IPV6)), 63 "No support for requested checksum\n")) { 64 skb_checksum_help(skb); 65 goto out; 66 } 67 68 if (skb->protocol == htons(ETH_P_IP)) { 69 protocol = ip_hdr(skb)->protocol; 70 } else { 71 #if IS_ENABLED(CONFIG_IPV6) 72 struct ipv6hdr *ipv6h = 73 (struct ipv6hdr *)skb_network_header(skb); 74 unsigned int off = sizeof(*ipv6h); 75 76 protocol = ipv6h->nexthdr; 77 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 78 struct ipv6_opt_hdr *hp; 79 80 /* only supported extension headers */ 81 if (protocol != NEXTHDR_ROUTING && 82 protocol != NEXTHDR_HOP && 83 protocol != NEXTHDR_DEST) { 84 skb_checksum_help(skb); 85 goto out; 86 } 87 88 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 89 protocol = hp->nexthdr; 90 off += ipv6_optlen(hp); 91 } 92 /* if we get here - protocol now should be TCP/UDP */ 93 #endif 94 } 95 96 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 97 WARN_ON_ONCE(1); 98 skb_checksum_help(skb); 99 goto out; 100 } 101 102 /* enable L4 csum */ 103 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 104 105 /* 106 * Set offset to IP header (snap). 107 * We don't support tunneling so no need to take care of inner header. 108 * Size is in words. 109 */ 110 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 111 112 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 113 if (skb->protocol == htons(ETH_P_IP) && amsdu) { 114 ip_hdr(skb)->check = 0; 115 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 116 } 117 118 /* reset UDP/TCP header csum */ 119 if (protocol == IPPROTO_TCP) 120 tcp_hdr(skb)->check = 0; 121 else 122 udp_hdr(skb)->check = 0; 123 124 out: 125 #endif 126 /* 127 * mac header len should include IV, size is in words unless 128 * the IV is added by the firmware like in WEP. 129 * In new Tx API, the IV is always added by the firmware. 130 */ 131 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 132 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 133 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 134 mh_len += info->control.hw_key->iv_len; 135 mh_len /= 2; 136 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 137 138 if (amsdu) 139 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 140 else if (ieee80211_hdrlen(hdr->frame_control) % 4) 141 /* padding is inserted later in transport */ 142 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 143 144 return offload_assist; 145 } 146 147 /* 148 * Sets most of the Tx cmd's fields 149 */ 150 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 151 struct iwl_tx_cmd_v6 *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 (!is_cck) 287 rate_flags |= RATE_MCS_MOD_TYPE_LEGACY_OFDM; 288 else 289 rate_flags |= RATE_MCS_MOD_TYPE_CCK; 290 291 return (u32)rate_plcp | rate_flags; 292 } 293 294 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm, 295 struct ieee80211_tx_info *info, 296 struct ieee80211_sta *sta, 297 __le16 fc) 298 { 299 struct ieee80211_tx_rate *rate = &info->control.rates[0]; 300 u32 result; 301 302 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { 303 u8 mcs = ieee80211_rate_get_vht_mcs(rate); 304 u8 nss = ieee80211_rate_get_vht_nss(rate); 305 306 result = RATE_MCS_MOD_TYPE_VHT; 307 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK); 308 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK); 309 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 310 result |= RATE_MCS_SGI_MSK; 311 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 312 result |= RATE_MCS_CHAN_WIDTH_40; 313 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 314 result |= RATE_MCS_CHAN_WIDTH_80; 315 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 316 result |= RATE_MCS_CHAN_WIDTH_160; 317 } else if (rate->flags & IEEE80211_TX_RC_MCS) { 318 result = RATE_MCS_MOD_TYPE_HT; 319 result |= u32_encode_bits(rate->idx & 0x7, 320 RATE_HT_MCS_CODE_MSK); 321 result |= u32_encode_bits(rate->idx >> 3, 322 RATE_MCS_NSS_MSK); 323 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 324 result |= RATE_MCS_SGI_MSK; 325 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 326 result |= RATE_MCS_CHAN_WIDTH_40; 327 if (info->flags & IEEE80211_TX_CTL_LDPC) 328 result |= RATE_MCS_LDPC_MSK; 329 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC)) 330 result |= RATE_MCS_STBC_MSK; 331 } else { 332 int rate_idx = info->control.rates[0].idx; 333 334 result = iwl_mvm_convert_rate_idx(mvm, info, rate_idx); 335 } 336 337 if (info->control.antennas) 338 result |= u32_encode_bits(info->control.antennas, 339 RATE_MCS_ANT_AB_MSK); 340 else 341 result |= iwl_mvm_get_tx_ant(mvm, info, sta, fc); 342 343 return result; 344 } 345 346 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 347 struct ieee80211_tx_info *info, 348 struct ieee80211_sta *sta, __le16 fc) 349 { 350 int rate_idx = -1; 351 352 if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { 353 /* info->control is only relevant for non HW rate control */ 354 355 /* HT rate doesn't make sense for a non data frame */ 356 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && 357 !ieee80211_is_data(fc), 358 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", 359 info->control.rates[0].flags, 360 info->control.rates[0].idx, 361 le16_to_cpu(fc), 362 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 363 364 rate_idx = info->control.rates[0].idx; 365 366 /* For non 2 GHZ band, remap mac80211 rate indices into driver 367 * indices. 368 */ 369 if (info->band != NL80211_BAND_2GHZ || 370 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE)) 371 rate_idx += IWL_FIRST_OFDM_RATE; 372 373 /* For 2.4 GHZ band, check that there is no need to remap */ 374 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 375 } 376 377 return iwl_mvm_convert_rate_idx(mvm, info, rate_idx); 378 } 379 380 static __le32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 381 struct ieee80211_tx_info *info, 382 struct ieee80211_sta *sta, __le16 fc) 383 { 384 u32 rate; 385 386 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) 387 rate = iwl_mvm_get_inject_tx_rate(mvm, info, sta, fc); 388 else 389 rate = iwl_mvm_get_tx_rate(mvm, info, sta, fc) | 390 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 391 392 return iwl_mvm_v3_rate_to_fw(rate, mvm->fw_rates_ver); 393 } 394 395 /* 396 * Sets the fields in the Tx cmd that are rate related 397 */ 398 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd_v6 *tx_cmd, 399 struct ieee80211_tx_info *info, 400 struct ieee80211_sta *sta, __le16 fc) 401 { 402 /* Set retry limit on RTS packets */ 403 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 404 405 /* Set retry limit on DATA packets and Probe Responses*/ 406 if (ieee80211_is_probe_resp(fc)) { 407 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 408 tx_cmd->rts_retry_limit = 409 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 410 } else if (ieee80211_is_back_req(fc)) { 411 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 412 } else { 413 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 414 } 415 416 /* 417 * for data packets, rate info comes from the table inside the fw. This 418 * table is controlled by LINK_QUALITY commands 419 */ 420 421 if (likely(ieee80211_is_data(fc) && sta && 422 !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) { 423 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 424 425 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 426 tx_cmd->initial_rate_index = 0; 427 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 428 return; 429 } 430 } else if (ieee80211_is_back_req(fc)) { 431 tx_cmd->tx_flags |= 432 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 433 } 434 435 /* Set the rate in the TX cmd */ 436 tx_cmd->rate_n_flags = iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc); 437 } 438 439 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 440 u8 *crypto_hdr) 441 { 442 struct ieee80211_key_conf *keyconf = info->control.hw_key; 443 u64 pn; 444 445 pn = atomic64_inc_return(&keyconf->tx_pn); 446 crypto_hdr[0] = pn; 447 crypto_hdr[2] = 0; 448 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 449 crypto_hdr[1] = pn >> 8; 450 crypto_hdr[4] = pn >> 16; 451 crypto_hdr[5] = pn >> 24; 452 crypto_hdr[6] = pn >> 32; 453 crypto_hdr[7] = pn >> 40; 454 } 455 456 /* 457 * Sets the fields in the Tx cmd that are crypto related 458 */ 459 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 460 struct ieee80211_tx_info *info, 461 struct iwl_tx_cmd_v6 *tx_cmd, 462 struct sk_buff *skb_frag, 463 int hdrlen) 464 { 465 struct ieee80211_key_conf *keyconf = info->control.hw_key; 466 u8 *crypto_hdr = skb_frag->data + hdrlen; 467 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 468 u64 pn; 469 470 switch (keyconf->cipher) { 471 case WLAN_CIPHER_SUITE_CCMP: 472 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 473 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 474 break; 475 476 case WLAN_CIPHER_SUITE_TKIP: 477 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 478 pn = atomic64_inc_return(&keyconf->tx_pn); 479 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 480 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 481 break; 482 483 case WLAN_CIPHER_SUITE_WEP104: 484 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 485 fallthrough; 486 case WLAN_CIPHER_SUITE_WEP40: 487 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 488 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 489 TX_CMD_SEC_WEP_KEY_IDX_MSK); 490 491 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 492 break; 493 case WLAN_CIPHER_SUITE_GCMP: 494 case WLAN_CIPHER_SUITE_GCMP_256: 495 type = TX_CMD_SEC_GCMP; 496 fallthrough; 497 case WLAN_CIPHER_SUITE_CCMP_256: 498 /* TODO: Taking the key from the table might introduce a race 499 * when PTK rekeying is done, having an old packets with a PN 500 * based on the old key but the message encrypted with a new 501 * one. 502 * Need to handle this. 503 */ 504 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 505 tx_cmd->key[0] = keyconf->hw_key_idx; 506 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 507 break; 508 default: 509 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 510 } 511 } 512 513 static bool iwl_mvm_use_host_rate(struct iwl_mvm *mvm, 514 struct iwl_mvm_sta *mvmsta, 515 struct ieee80211_hdr *hdr, 516 struct ieee80211_tx_info *info) 517 { 518 if (unlikely(!mvmsta)) 519 return true; 520 521 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) 522 return true; 523 524 if (likely(ieee80211_is_data(hdr->frame_control) && 525 mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED)) 526 return false; 527 528 /* 529 * Not a data frame, use host rate if on an old device that 530 * can't possibly be doing MLO (firmware may be selecting a 531 * bad rate), if we might be doing MLO we need to let FW pick 532 * (since we don't necesarily know the link), but FW rate 533 * selection was fixed. 534 */ 535 return mvm->trans->mac_cfg->device_family < IWL_DEVICE_FAMILY_BZ; 536 } 537 538 static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen, 539 const u8 *addr3_override) 540 { 541 struct ieee80211_hdr *out_hdr = cmd; 542 543 memcpy(cmd, hdr, hdrlen); 544 if (addr3_override) 545 memcpy(out_hdr->addr3, addr3_override, ETH_ALEN); 546 } 547 548 /* 549 * Allocates and sets the Tx cmd the driver data pointers in the skb 550 */ 551 static struct iwl_device_tx_cmd * 552 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 553 struct ieee80211_tx_info *info, int hdrlen, 554 struct ieee80211_sta *sta, u8 sta_id, 555 const u8 *addr3_override) 556 { 557 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 558 struct iwl_device_tx_cmd *dev_cmd; 559 struct iwl_tx_cmd_v6 *tx_cmd; 560 561 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 562 563 if (unlikely(!dev_cmd)) 564 return NULL; 565 566 dev_cmd->hdr.cmd = TX_CMD; 567 568 if (iwl_mvm_has_new_tx_api(mvm)) { 569 __le32 rate_n_flags = 0; 570 u16 flags = 0; 571 struct iwl_mvm_sta *mvmsta = sta ? 572 iwl_mvm_sta_from_mac80211(sta) : NULL; 573 bool amsdu = false; 574 575 if (ieee80211_is_data_qos(hdr->frame_control)) { 576 u8 *qc = ieee80211_get_qos_ctl(hdr); 577 578 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 579 } 580 581 if (!info->control.hw_key) 582 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 583 584 /* 585 * For data and mgmt packets rate info comes from the fw (for 586 * new devices, older FW is somewhat broken for this). Only 587 * set rate/antenna for injected frames with fixed rate, or 588 * when no sta is given, or with older firmware. 589 */ 590 if (unlikely(iwl_mvm_use_host_rate(mvm, mvmsta, hdr, info))) { 591 flags |= IWL_TX_FLAGS_CMD_RATE; 592 rate_n_flags = 593 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 594 hdr->frame_control); 595 } else if (!ieee80211_is_data(hdr->frame_control) || 596 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 597 /* These are important frames */ 598 flags |= IWL_TX_FLAGS_HIGH_PRI; 599 } 600 601 if (mvm->trans->mac_cfg->device_family >= 602 IWL_DEVICE_FAMILY_AX210) { 603 struct iwl_tx_cmd *cmd = (void *)dev_cmd->payload; 604 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, 605 info, amsdu); 606 607 cmd->offload_assist = cpu_to_le32(offload_assist); 608 609 /* Total # bytes to be transmitted */ 610 cmd->len = cpu_to_le16((u16)skb->len); 611 612 /* Copy MAC header from skb into command buffer */ 613 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override); 614 615 cmd->flags = cpu_to_le16(flags); 616 cmd->rate_n_flags = rate_n_flags; 617 } else { 618 struct iwl_tx_cmd_v9 *cmd = (void *)dev_cmd->payload; 619 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb, 620 info, amsdu); 621 622 cmd->offload_assist = cpu_to_le16(offload_assist); 623 624 /* Total # bytes to be transmitted */ 625 cmd->len = cpu_to_le16((u16)skb->len); 626 627 /* Copy MAC header from skb into command buffer */ 628 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override); 629 630 cmd->flags = cpu_to_le32(flags); 631 cmd->rate_n_flags = rate_n_flags; 632 } 633 goto out; 634 } 635 636 tx_cmd = (struct iwl_tx_cmd_v6 *)dev_cmd->payload; 637 638 if (info->control.hw_key) 639 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 640 641 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 642 643 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 644 645 /* Copy MAC header from skb into command buffer */ 646 iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override); 647 648 out: 649 return dev_cmd; 650 } 651 652 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 653 struct iwl_device_tx_cmd *cmd) 654 { 655 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 656 657 memset(&skb_info->status, 0, sizeof(skb_info->status)); 658 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 659 660 skb_info->driver_data[1] = cmd; 661 } 662 663 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 664 struct iwl_mvm_vif_link_info *link, 665 struct ieee80211_tx_info *info, 666 struct sk_buff *skb) 667 { 668 struct ieee80211_hdr *hdr = (void *)skb->data; 669 __le16 fc = hdr->frame_control; 670 671 switch (info->control.vif->type) { 672 case NL80211_IFTYPE_AP: 673 case NL80211_IFTYPE_ADHOC: 674 /* 675 * Non-bufferable frames use the broadcast station, thus they 676 * use the probe queue. 677 * Also take care of the case where we send a deauth to a 678 * station that we don't have, or similarly an association 679 * response (with non-success status) for a station we can't 680 * accept. 681 * Also, disassociate frames might happen, particular with 682 * reason 7 ("Class 3 frame received from nonassociated STA"). 683 */ 684 if (ieee80211_is_mgmt(fc) && 685 (!ieee80211_is_bufferable_mmpdu(skb) || 686 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 687 return link->mgmt_queue; 688 689 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 690 is_multicast_ether_addr(hdr->addr1)) 691 return link->cab_queue; 692 693 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 694 "fc=0x%02x", le16_to_cpu(fc)); 695 return link->mgmt_queue; 696 case NL80211_IFTYPE_P2P_DEVICE: 697 if (ieee80211_is_mgmt(fc)) 698 return mvm->p2p_dev_queue; 699 700 WARN_ON_ONCE(1); 701 return mvm->p2p_dev_queue; 702 default: 703 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 704 return -1; 705 } 706 } 707 708 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 709 struct sk_buff *skb) 710 { 711 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 712 struct iwl_mvm_vif *mvmvif = 713 iwl_mvm_vif_from_mac80211(info->control.vif); 714 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 715 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 716 struct iwl_probe_resp_data *resp_data; 717 const u8 *ie; 718 u8 *pos; 719 u8 match[] = { 720 (WLAN_OUI_WFA >> 16) & 0xff, 721 (WLAN_OUI_WFA >> 8) & 0xff, 722 WLAN_OUI_WFA & 0xff, 723 WLAN_OUI_TYPE_WFA_P2P, 724 }; 725 726 rcu_read_lock(); 727 728 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data); 729 if (!resp_data) 730 goto out; 731 732 if (!resp_data->notif.noa_active) 733 goto out; 734 735 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 736 mgmt->u.probe_resp.variable, 737 skb->len - base_len, 738 match, 4, 2); 739 if (!ie) { 740 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 741 goto out; 742 } 743 744 if (skb_tailroom(skb) < resp_data->noa_len) { 745 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 746 IWL_ERR(mvm, 747 "Failed to reallocate probe resp\n"); 748 goto out; 749 } 750 } 751 752 pos = skb_put(skb, resp_data->noa_len); 753 754 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 755 /* Set length of IE body (not including ID and length itself) */ 756 *pos++ = resp_data->noa_len - 2; 757 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 758 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 759 *pos++ = WLAN_OUI_WFA & 0xff; 760 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 761 762 memcpy(pos, &resp_data->notif.noa_attr, 763 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 764 765 out: 766 rcu_read_unlock(); 767 } 768 769 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 770 { 771 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 772 struct ieee80211_tx_info info; 773 struct iwl_device_tx_cmd *dev_cmd; 774 u8 sta_id; 775 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 776 __le16 fc = hdr->frame_control; 777 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 778 IEEE80211_TX_CTL_TX_OFFCHAN; 779 int queue = -1; 780 781 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 782 return -1; 783 784 memcpy(&info, skb->cb, sizeof(info)); 785 786 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 787 return -1; 788 789 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 790 return -1; 791 792 if (info.control.vif) { 793 struct iwl_mvm_vif *mvmvif = 794 iwl_mvm_vif_from_mac80211(info.control.vif); 795 bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm); 796 797 if ((info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE && 798 p2p_aux) || 799 (info.control.vif->type == NL80211_IFTYPE_STATION && 800 offchannel)) { 801 /* 802 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 803 * that can be used in 2 different types of vifs, P2P 804 * Device and STATION. 805 * P2P Device uses the offchannel queue. 806 * STATION (HS2.0) uses the auxiliary context of the FW, 807 * and hence needs to be sent on the aux queue. 808 * If P2P_DEV_OVER_AUX is supported (p2p_aux = true) 809 * also P2P Device uses the aux queue. 810 */ 811 sta_id = mvm->aux_sta.sta_id; 812 queue = mvm->aux_queue; 813 if (WARN_ON(queue == IWL_MVM_INVALID_QUEUE)) 814 return -1; 815 } else if (info.control.vif->type == 816 NL80211_IFTYPE_P2P_DEVICE || 817 info.control.vif->type == NL80211_IFTYPE_AP || 818 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 819 u32 link_id = u32_get_bits(info.control.flags, 820 IEEE80211_TX_CTRL_MLO_LINK); 821 struct iwl_mvm_vif_link_info *link; 822 823 if (link_id == IEEE80211_LINK_UNSPECIFIED) { 824 if (info.control.vif->active_links) 825 link_id = ffs(info.control.vif->active_links) - 1; 826 else 827 link_id = 0; 828 } 829 830 link = mvmvif->link[link_id]; 831 if (WARN_ON(!link)) 832 return -1; 833 834 if (!ieee80211_is_data(hdr->frame_control)) 835 sta_id = link->bcast_sta.sta_id; 836 else 837 sta_id = link->mcast_sta.sta_id; 838 839 queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info, 840 skb); 841 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 842 queue = mvm->snif_queue; 843 sta_id = mvm->snif_sta.sta_id; 844 } 845 } 846 847 if (queue < 0) { 848 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 849 return -1; 850 } 851 852 if (unlikely(ieee80211_is_probe_resp(fc))) 853 iwl_mvm_probe_resp_set_noa(mvm, skb); 854 855 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 856 857 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id, 858 NULL); 859 if (!dev_cmd) 860 return -1; 861 862 /* From now on, we cannot access info->control */ 863 iwl_mvm_skb_prepare_status(skb, dev_cmd); 864 865 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 866 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 867 return -1; 868 } 869 870 return 0; 871 } 872 873 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 874 struct ieee80211_sta *sta, unsigned int tid) 875 { 876 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 877 u8 ac = tid_to_mac80211_ac[tid]; 878 enum nl80211_band band; 879 unsigned int txf; 880 unsigned int val; 881 int lmac; 882 883 /* For HE redirect to trigger based fifos */ 884 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 885 ac += 4; 886 887 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 888 889 /* 890 * Don't send an AMSDU that will be longer than the TXF. 891 * Add a security margin of 256 for the TX command + headers. 892 * We also want to have the start of the next packet inside the 893 * fifo to be able to send bursts. 894 */ 895 val = mvmsta->max_amsdu_len; 896 897 if (hweight16(sta->valid_links) <= 1) { 898 if (sta->valid_links) { 899 struct ieee80211_bss_conf *link_conf; 900 unsigned int link = ffs(sta->valid_links) - 1; 901 902 rcu_read_lock(); 903 link_conf = rcu_dereference(mvmsta->vif->link_conf[link]); 904 if (WARN_ON(!link_conf)) 905 band = NL80211_BAND_2GHZ; 906 else 907 band = link_conf->chanreq.oper.chan->band; 908 rcu_read_unlock(); 909 } else { 910 band = mvmsta->vif->bss_conf.chanreq.oper.chan->band; 911 } 912 913 lmac = iwl_mvm_get_lmac_id(mvm, band); 914 } else if (fw_has_capa(&mvm->fw->ucode_capa, 915 IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) { 916 /* for real MLO restrict to both LMACs if they exist */ 917 lmac = IWL_LMAC_5G_INDEX; 918 val = min_t(unsigned int, val, 919 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 920 lmac = IWL_LMAC_24G_INDEX; 921 } else { 922 lmac = IWL_LMAC_24G_INDEX; 923 } 924 925 return min_t(unsigned int, val, 926 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 927 } 928 929 #ifdef CONFIG_INET 930 931 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 932 struct ieee80211_tx_info *info, 933 struct ieee80211_sta *sta, 934 struct sk_buff_head *mpdus_skb) 935 { 936 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 937 struct ieee80211_hdr *hdr = (void *)skb->data; 938 unsigned int mss = skb_shinfo(skb)->gso_size; 939 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 940 u16 snap_ip_tcp, pad; 941 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 942 u8 tid; 943 944 snap_ip_tcp = 8 + skb_network_header_len(skb) + tcp_hdrlen(skb); 945 946 if (!mvmsta->max_amsdu_len || 947 !ieee80211_is_data_qos(hdr->frame_control) || 948 !mvmsta->amsdu_enabled) 949 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 950 951 /* 952 * Do not build AMSDU for IPv6 with extension headers. 953 * ask stack to segment and checkum the generated MPDUs for us. 954 */ 955 if (skb->protocol == htons(ETH_P_IPV6) && 956 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 957 IPPROTO_TCP) { 958 netdev_flags &= ~NETIF_F_CSUM_MASK; 959 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 960 } 961 962 tid = ieee80211_get_tid(hdr); 963 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 964 return -EINVAL; 965 966 /* 967 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 968 * during an BA session. 969 */ 970 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 971 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 972 !(mvmsta->amsdu_enabled & BIT(tid))) 973 return iwl_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 974 975 /* 976 * Take the min of ieee80211 station and mvm station 977 */ 978 max_amsdu_len = 979 min_t(unsigned int, sta->cur->max_amsdu_len, 980 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 981 982 /* 983 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 984 * supported. This is a spec requirement (IEEE 802.11-2015 985 * section 8.7.3 NOTE 3). 986 */ 987 if (info->flags & IEEE80211_TX_CTL_AMPDU && 988 !sta->deflink.vht_cap.vht_supported) 989 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 990 991 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 992 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 993 pad = (4 - subf_len) & 0x3; 994 995 /* 996 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 997 * N * subf_len + (N - 1) * pad. 998 */ 999 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 1000 1001 if (sta->max_amsdu_subframes && 1002 num_subframes > sta->max_amsdu_subframes) 1003 num_subframes = sta->max_amsdu_subframes; 1004 1005 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1006 tcp_hdrlen(skb) + skb->data_len; 1007 1008 /* 1009 * Make sure we have enough TBs for the A-MSDU: 1010 * 2 for each subframe 1011 * 1 more for each fragment 1012 * 1 more for the potential data in the header 1013 */ 1014 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 1015 mvm->trans->info.max_skb_frags) 1016 num_subframes = 1; 1017 1018 if (num_subframes > 1) 1019 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1020 1021 /* This skb fits in one single A-MSDU */ 1022 if (num_subframes * mss >= tcp_payload_len) { 1023 __skb_queue_tail(mpdus_skb, skb); 1024 return 0; 1025 } 1026 1027 /* 1028 * Trick the segmentation function to make it 1029 * create SKBs that can fit into one A-MSDU. 1030 */ 1031 return iwl_tx_tso_segment(skb, num_subframes, netdev_flags, mpdus_skb); 1032 } 1033 #else /* CONFIG_INET */ 1034 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 1035 struct ieee80211_tx_info *info, 1036 struct ieee80211_sta *sta, 1037 struct sk_buff_head *mpdus_skb) 1038 { 1039 /* Impossible to get TSO with CONFIG_INET */ 1040 WARN_ON(1); 1041 1042 return -1; 1043 } 1044 #endif 1045 1046 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1047 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1048 { 1049 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1050 unsigned long now = jiffies; 1051 int tid; 1052 1053 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1054 return false; 1055 1056 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1057 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1058 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1059 return true; 1060 } 1061 1062 return false; 1063 } 1064 1065 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1066 struct iwl_mvm_sta *mvmsta, 1067 int airtime) 1068 { 1069 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1070 struct iwl_mvm_tcm_mac *mdata; 1071 1072 if (mac >= NUM_MAC_INDEX_DRIVER) 1073 return; 1074 1075 mdata = &mvm->tcm.data[mac]; 1076 1077 if (mvm->tcm.paused) 1078 return; 1079 1080 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1081 schedule_delayed_work(&mvm->tcm.work, 0); 1082 1083 mdata->tx.airtime += airtime; 1084 } 1085 1086 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1087 struct iwl_mvm_sta *mvmsta, int tid) 1088 { 1089 u32 ac = tid_to_mac80211_ac[tid]; 1090 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1091 struct iwl_mvm_tcm_mac *mdata; 1092 1093 if (mac >= NUM_MAC_INDEX_DRIVER) 1094 return -EINVAL; 1095 1096 mdata = &mvm->tcm.data[mac]; 1097 1098 mdata->tx.pkts[ac]++; 1099 1100 return 0; 1101 } 1102 1103 /* 1104 * Sets the fields in the Tx cmd that are crypto related. 1105 * 1106 * This function must be called with BHs disabled. 1107 */ 1108 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1109 struct ieee80211_tx_info *info, 1110 struct ieee80211_sta *sta, 1111 const u8 *addr3_override) 1112 { 1113 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1114 struct iwl_mvm_sta *mvmsta; 1115 struct iwl_device_tx_cmd *dev_cmd; 1116 __le16 fc; 1117 u16 seq_number = 0; 1118 u8 tid = IWL_MAX_TID_COUNT; 1119 u16 txq_id; 1120 bool is_ampdu = false; 1121 int hdrlen; 1122 1123 if (WARN_ON_ONCE(!sta)) 1124 return -1; 1125 1126 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1127 fc = hdr->frame_control; 1128 hdrlen = ieee80211_hdrlen(fc); 1129 1130 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1131 return -1; 1132 1133 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_INVALID_STA)) 1134 return -1; 1135 1136 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he) 1137 return -1; 1138 1139 if (unlikely(ieee80211_is_probe_resp(fc))) 1140 iwl_mvm_probe_resp_set_noa(mvm, skb); 1141 1142 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1143 sta, mvmsta->deflink.sta_id, 1144 addr3_override); 1145 if (!dev_cmd) 1146 goto drop; 1147 1148 /* 1149 * we handle that entirely ourselves -- for uAPSD the firmware 1150 * will always send a notification, and for PS-Poll responses 1151 * we'll notify mac80211 when getting frame status 1152 */ 1153 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1154 1155 spin_lock(&mvmsta->lock); 1156 1157 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1158 * the conditions of !ieee80211_is_qos_nullfunc(fc) and 1159 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID 1160 */ 1161 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1162 tid = ieee80211_get_tid(hdr); 1163 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1164 goto drop_unlock_sta; 1165 1166 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1167 if (WARN_ONCE(is_ampdu && 1168 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1169 "Invalid internal agg state %d for TID %d", 1170 mvmsta->tid_data[tid].state, tid)) 1171 goto drop_unlock_sta; 1172 1173 seq_number = mvmsta->tid_data[tid].seq_number; 1174 seq_number &= IEEE80211_SCTL_SEQ; 1175 1176 if (!iwl_mvm_has_new_tx_api(mvm)) { 1177 struct iwl_tx_cmd_v6 *tx_cmd = (void *)dev_cmd->payload; 1178 1179 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1180 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1181 /* update the tx_cmd hdr as it was already copied */ 1182 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1183 } 1184 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) && 1185 !ieee80211_is_nullfunc(fc)) { 1186 tid = IWL_TID_NON_QOS; 1187 } 1188 1189 txq_id = mvmsta->tid_data[tid].txq_id; 1190 1191 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1192 1193 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1194 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1195 spin_unlock(&mvmsta->lock); 1196 return -1; 1197 } 1198 1199 if (!iwl_mvm_has_new_tx_api(mvm)) { 1200 /* Keep track of the time of the last frame for this RA/TID */ 1201 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1202 1203 /* 1204 * If we have timed-out TIDs - schedule the worker that will 1205 * reconfig the queues and update them 1206 * 1207 * Note that the no lock is taken here in order to not serialize 1208 * the TX flow. This isn't dangerous because scheduling 1209 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1210 * schedule it due to some race condition then next TX we get 1211 * here we will. 1212 */ 1213 if (unlikely(mvm->queue_info[txq_id].status == 1214 IWL_MVM_QUEUE_SHARED && 1215 iwl_mvm_txq_should_update(mvm, txq_id))) 1216 schedule_work(&mvm->add_stream_wk); 1217 } 1218 1219 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1220 mvmsta->deflink.sta_id, tid, txq_id, 1221 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1222 1223 /* From now on, we cannot access info->control */ 1224 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1225 1226 /* 1227 * The IV is introduced by the HW for new tx api, and it is not present 1228 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the 1229 * IV for those devices. 1230 */ 1231 if (ieee80211_is_data(fc)) 1232 iwl_mvm_mei_tx_copy_to_csme(mvm, skb, 1233 info->control.hw_key && 1234 !iwl_mvm_has_new_tx_api(mvm) ? 1235 info->control.hw_key->iv_len : 0); 1236 1237 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1238 goto drop_unlock_sta; 1239 1240 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1241 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1242 1243 spin_unlock(&mvmsta->lock); 1244 1245 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1246 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1247 goto drop; 1248 1249 return 0; 1250 1251 drop_unlock_sta: 1252 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1253 spin_unlock(&mvmsta->lock); 1254 drop: 1255 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id, 1256 tid); 1257 return -1; 1258 } 1259 1260 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1261 struct ieee80211_sta *sta) 1262 { 1263 struct iwl_mvm_sta *mvmsta; 1264 struct ieee80211_tx_info info; 1265 struct sk_buff_head mpdus_skbs; 1266 struct ieee80211_vif *vif; 1267 unsigned int payload_len; 1268 int ret; 1269 struct sk_buff *orig_skb = skb; 1270 const u8 *addr3; 1271 1272 if (WARN_ON_ONCE(!sta)) 1273 return -1; 1274 1275 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1276 1277 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_INVALID_STA)) 1278 return -1; 1279 1280 memcpy(&info, skb->cb, sizeof(info)); 1281 1282 if (!skb_is_gso(skb)) 1283 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL); 1284 1285 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1286 tcp_hdrlen(skb) + skb->data_len; 1287 1288 if (payload_len <= skb_shinfo(skb)->gso_size) 1289 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL); 1290 1291 __skb_queue_head_init(&mpdus_skbs); 1292 1293 vif = info.control.vif; 1294 if (!vif) 1295 return -1; 1296 1297 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1298 if (ret) 1299 return ret; 1300 1301 WARN_ON(skb_queue_empty(&mpdus_skbs)); 1302 1303 /* 1304 * As described in IEEE sta 802.11-2020, table 9-30 (Address 1305 * field contents), A-MSDU address 3 should contain the BSSID 1306 * address. 1307 * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it 1308 * in the command header. We need to preserve the original 1309 * address 3 in the skb header to correctly create all the 1310 * A-MSDU subframe headers from it. 1311 */ 1312 switch (vif->type) { 1313 case NL80211_IFTYPE_STATION: 1314 addr3 = vif->cfg.ap_addr; 1315 break; 1316 case NL80211_IFTYPE_AP: 1317 addr3 = vif->addr; 1318 break; 1319 default: 1320 addr3 = NULL; 1321 break; 1322 } 1323 1324 while (!skb_queue_empty(&mpdus_skbs)) { 1325 struct ieee80211_hdr *hdr; 1326 bool amsdu; 1327 1328 skb = __skb_dequeue(&mpdus_skbs); 1329 hdr = (void *)skb->data; 1330 amsdu = ieee80211_is_data_qos(hdr->frame_control) && 1331 (*ieee80211_get_qos_ctl(hdr) & 1332 IEEE80211_QOS_CTL_A_MSDU_PRESENT); 1333 1334 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta, 1335 amsdu ? addr3 : NULL); 1336 if (ret) { 1337 /* Free skbs created as part of TSO logic that have not yet been dequeued */ 1338 __skb_queue_purge(&mpdus_skbs); 1339 /* skb here is not necessarily same as skb that entered this method, 1340 * so free it explicitly. 1341 */ 1342 if (skb == orig_skb) 1343 ieee80211_free_txskb(mvm->hw, skb); 1344 else 1345 kfree_skb(skb); 1346 /* there was error, but we consumed skb one way or another, so return 0 */ 1347 return 0; 1348 } 1349 } 1350 1351 return 0; 1352 } 1353 1354 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1355 struct ieee80211_sta *sta, u8 tid) 1356 { 1357 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1358 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1359 struct ieee80211_vif *vif = mvmsta->vif; 1360 u16 normalized_ssn; 1361 1362 lockdep_assert_held(&mvmsta->lock); 1363 1364 if (tid_data->state == IWL_AGG_ON && 1365 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1366 /* 1367 * Now that this aggregation or DQA queue is empty tell 1368 * mac80211 so it knows we no longer have frames buffered for 1369 * the station on this TID (for the TIM bitmap calculation.) 1370 */ 1371 ieee80211_sta_set_buffered(sta, tid, false); 1372 } 1373 1374 /* 1375 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1376 * to align the wrap around of ssn so we compare relevant values. 1377 */ 1378 normalized_ssn = tid_data->ssn; 1379 if (mvm->trans->mac_cfg->gen2) 1380 normalized_ssn &= 0xff; 1381 1382 if (normalized_ssn != tid_data->next_reclaimed) 1383 return; 1384 1385 switch (tid_data->state) { 1386 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1387 IWL_DEBUG_TX_QUEUES(mvm, 1388 "Can continue addBA flow ssn = next_recl = %d\n", 1389 tid_data->next_reclaimed); 1390 tid_data->state = IWL_AGG_STARTING; 1391 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1392 break; 1393 default: 1394 break; 1395 } 1396 } 1397 1398 #ifdef CONFIG_IWLWIFI_DEBUG 1399 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1400 { 1401 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1402 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1403 1404 switch (status & TX_STATUS_MSK) { 1405 case TX_STATUS_SUCCESS: 1406 return "SUCCESS"; 1407 TX_STATUS_POSTPONE(DELAY); 1408 TX_STATUS_POSTPONE(FEW_BYTES); 1409 TX_STATUS_POSTPONE(BT_PRIO); 1410 TX_STATUS_POSTPONE(QUIET_PERIOD); 1411 TX_STATUS_POSTPONE(CALC_TTAK); 1412 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1413 TX_STATUS_FAIL(SHORT_LIMIT); 1414 TX_STATUS_FAIL(LONG_LIMIT); 1415 TX_STATUS_FAIL(UNDERRUN); 1416 TX_STATUS_FAIL(DRAIN_FLOW); 1417 TX_STATUS_FAIL(RFKILL_FLUSH); 1418 TX_STATUS_FAIL(LIFE_EXPIRE); 1419 TX_STATUS_FAIL(DEST_PS); 1420 TX_STATUS_FAIL(HOST_ABORTED); 1421 TX_STATUS_FAIL(BT_RETRY); 1422 TX_STATUS_FAIL(STA_INVALID); 1423 TX_STATUS_FAIL(FRAG_DROPPED); 1424 TX_STATUS_FAIL(TID_DISABLE); 1425 TX_STATUS_FAIL(FIFO_FLUSHED); 1426 TX_STATUS_FAIL(SMALL_CF_POLL); 1427 TX_STATUS_FAIL(FW_DROP); 1428 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1429 } 1430 1431 return "UNKNOWN"; 1432 1433 #undef TX_STATUS_FAIL 1434 #undef TX_STATUS_POSTPONE 1435 } 1436 #endif /* CONFIG_IWLWIFI_DEBUG */ 1437 1438 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1439 { 1440 switch (chan_width) { 1441 case RATE_MCS_CHAN_WIDTH_20: 1442 return 0; 1443 case RATE_MCS_CHAN_WIDTH_40: 1444 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1445 case RATE_MCS_CHAN_WIDTH_80: 1446 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1447 case RATE_MCS_CHAN_WIDTH_160: 1448 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1449 default: 1450 return 0; 1451 } 1452 } 1453 1454 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1455 enum nl80211_band band, 1456 struct ieee80211_tx_rate *r) 1457 { 1458 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1459 u32 rate = format == RATE_MCS_MOD_TYPE_HT ? 1460 RATE_HT_MCS_INDEX(rate_n_flags) : 1461 rate_n_flags & RATE_MCS_CODE_MSK; 1462 1463 r->flags |= 1464 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1465 RATE_MCS_CHAN_WIDTH_MSK); 1466 1467 if (rate_n_flags & RATE_MCS_SGI_MSK) 1468 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1469 switch (format) { 1470 case RATE_MCS_MOD_TYPE_HT: 1471 r->flags |= IEEE80211_TX_RC_MCS; 1472 r->idx = rate; 1473 break; 1474 case RATE_MCS_MOD_TYPE_VHT: 1475 ieee80211_rate_set_vht(r, rate, 1476 FIELD_GET(RATE_MCS_NSS_MSK, 1477 rate_n_flags) + 1); 1478 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1479 break; 1480 case RATE_MCS_MOD_TYPE_HE: 1481 case RATE_MCS_MOD_TYPE_EHT: 1482 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1483 * but it only matters for radiotap */ 1484 r->idx = 0; 1485 break; 1486 default: 1487 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1488 band); 1489 } 1490 } 1491 1492 /* 1493 * translate ucode response to mac80211 tx status control values 1494 */ 1495 static void iwl_mvm_hwrate_to_tx_status(struct iwl_mvm *mvm, 1496 __le32 rate_n_flags, 1497 struct ieee80211_tx_info *info) 1498 { 1499 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1500 u32 rate; 1501 1502 /* 1503 * Technically this conversion is incorrect for BA status, however: 1504 * - we only use the BA notif data for older firmware that have 1505 * host rate scaling and don't use newer rate formats 1506 * - the firmware API changed together for BA notif and TX CMD 1507 * as well 1508 */ 1509 rate = iwl_mvm_v3_rate_from_fw(rate_n_flags, mvm->fw_rates_ver); 1510 1511 info->status.antenna = 1512 ((rate & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1513 iwl_mvm_hwrate_to_tx_rate(rate, info->band, r); 1514 } 1515 1516 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1517 u32 status, __le16 frame_control) 1518 { 1519 struct iwl_fw_dbg_trigger_tlv *trig; 1520 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1521 int i; 1522 1523 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1524 enum iwl_fw_ini_time_point tp = 1525 IWL_FW_INI_TIME_POINT_TX_FAILED; 1526 1527 if (ieee80211_is_action(frame_control)) 1528 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1529 1530 iwl_dbg_tlv_time_point(&mvm->fwrt, 1531 tp, NULL); 1532 return; 1533 } 1534 1535 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1536 FW_DBG_TRIGGER_TX_STATUS); 1537 if (!trig) 1538 return; 1539 1540 status_trig = (void *)trig->data; 1541 1542 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1543 /* don't collect on status 0 */ 1544 if (!status_trig->statuses[i].status) 1545 break; 1546 1547 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1548 continue; 1549 1550 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1551 "Tx status %d was received", 1552 status & TX_STATUS_MSK); 1553 break; 1554 } 1555 } 1556 1557 /* 1558 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1559 * @tx_resp: the Tx response from the fw (agg or non-agg) 1560 * 1561 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1562 * it can't know that everything will go well until the end of the AMPDU, it 1563 * can't know in advance the number of MPDUs that will be sent in the current 1564 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1565 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1566 * of the batch. This is why the SSN of the SCD is written at the end of the 1567 * whole struct at a variable offset. This function knows how to cope with the 1568 * variable offset and returns the SSN of the SCD. 1569 * 1570 * For 22000-series and lower, this is just 12 bits. For later, 16 bits. 1571 */ 1572 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1573 struct iwl_tx_resp *tx_resp) 1574 { 1575 u32 val = le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1576 tx_resp->frame_count); 1577 1578 if (mvm->trans->mac_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 1579 return val & 0xFFFF; 1580 return val & 0xFFF; 1581 } 1582 1583 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1584 struct iwl_rx_packet *pkt) 1585 { 1586 struct ieee80211_sta *sta; 1587 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1588 int txq_id = SEQ_TO_QUEUE(sequence); 1589 /* struct iwl_tx_resp_v3 is almost the same */ 1590 struct iwl_tx_resp *tx_resp = (void *)pkt->data; 1591 int sta_id = IWL_TX_RES_GET_RA(tx_resp->ra_tid); 1592 int tid = IWL_TX_RES_GET_TID(tx_resp->ra_tid); 1593 struct agg_tx_status *agg_status = 1594 iwl_mvm_get_agg_status(mvm, tx_resp); 1595 u32 status = le16_to_cpu(agg_status->status); 1596 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1597 struct sk_buff_head skbs; 1598 u8 skb_freed = 0; 1599 u8 lq_color; 1600 u16 next_reclaimed, seq_ctl; 1601 bool is_ndp = false; 1602 1603 __skb_queue_head_init(&skbs); 1604 1605 if (iwl_mvm_has_new_tx_api(mvm)) 1606 txq_id = le16_to_cpu(tx_resp->tx_queue); 1607 1608 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1609 1610 /* we can free until ssn % q.n_bd not inclusive */ 1611 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false); 1612 1613 while (!skb_queue_empty(&skbs)) { 1614 struct sk_buff *skb = __skb_dequeue(&skbs); 1615 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1616 struct ieee80211_hdr *hdr = (void *)skb->data; 1617 bool flushed = false; 1618 1619 skb_freed++; 1620 1621 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1622 1623 memset(&info->status, 0, sizeof(info->status)); 1624 info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED); 1625 1626 /* inform mac80211 about what happened with the frame */ 1627 switch (status & TX_STATUS_MSK) { 1628 case TX_STATUS_SUCCESS: 1629 case TX_STATUS_DIRECT_DONE: 1630 info->flags |= IEEE80211_TX_STAT_ACK; 1631 break; 1632 case TX_STATUS_FAIL_FIFO_FLUSHED: 1633 case TX_STATUS_FAIL_DRAIN_FLOW: 1634 flushed = true; 1635 break; 1636 case TX_STATUS_FAIL_DEST_PS: 1637 /* the FW should have stopped the queue and not 1638 * return this status 1639 */ 1640 IWL_ERR_LIMIT(mvm, 1641 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1642 status, le16_to_cpu(hdr->frame_control)); 1643 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1644 break; 1645 default: 1646 break; 1647 } 1648 1649 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1650 ieee80211_is_mgmt(hdr->frame_control)) 1651 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1652 1653 /* 1654 * If we are freeing multiple frames, mark all the frames 1655 * but the first one as acked, since they were acknowledged 1656 * before 1657 * */ 1658 if (skb_freed > 1) 1659 info->flags |= IEEE80211_TX_STAT_ACK; 1660 1661 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1662 1663 info->status.rates[0].count = tx_resp->failure_frame + 1; 1664 1665 iwl_mvm_hwrate_to_tx_status(mvm, tx_resp->initial_rate, info); 1666 1667 /* Don't assign the converted initial_rate, because driver 1668 * TLC uses this and doesn't support the new FW rate 1669 */ 1670 info->status.status_driver_data[1] = 1671 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1672 1673 /* Single frame failure in an AMPDU queue => send BAR */ 1674 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1675 !(info->flags & IEEE80211_TX_STAT_ACK) && 1676 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1677 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1678 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1679 1680 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1681 if (ieee80211_is_back_req(hdr->frame_control)) 1682 seq_ctl = 0; 1683 else if (status != TX_STATUS_SUCCESS) 1684 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1685 1686 if (unlikely(!seq_ctl)) { 1687 /* 1688 * If it is an NDP, we can't update next_reclaim since 1689 * its sequence control is 0. Note that for that same 1690 * reason, NDPs are never sent to A-MPDU'able queues 1691 * so that we can never have more than one freed frame 1692 * for a single Tx resonse (see WARN_ON below). 1693 */ 1694 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1695 is_ndp = true; 1696 } 1697 1698 /* 1699 * TODO: this is not accurate if we are freeing more than one 1700 * packet. 1701 */ 1702 info->status.tx_time = 1703 le16_to_cpu(tx_resp->wireless_media_time); 1704 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1705 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1706 info->status.status_driver_data[0] = 1707 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1708 1709 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1))) 1710 ieee80211_tx_status_skb(mvm->hw, skb); 1711 } 1712 1713 /* This is an aggregation queue or might become one, so we use 1714 * the ssn since: ssn = wifi seq_num % 256. 1715 * The seq_ctl is the sequence control of the packet to which 1716 * this Tx response relates. But if there is a hole in the 1717 * bitmap of the BA we received, this Tx response may allow to 1718 * reclaim the hole and all the subsequent packets that were 1719 * already acked. In that case, seq_ctl != ssn, and the next 1720 * packet to be reclaimed will be ssn and not seq_ctl. In that 1721 * case, several packets will be reclaimed even if 1722 * frame_count = 1. 1723 * 1724 * The ssn is the index (% 256) of the latest packet that has 1725 * treated (acked / dropped) + 1. 1726 */ 1727 next_reclaimed = ssn; 1728 1729 IWL_DEBUG_TX_REPLY(mvm, 1730 "TXQ %d status %s (0x%08x)\n", 1731 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1732 1733 IWL_DEBUG_TX_REPLY(mvm, 1734 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1735 le32_to_cpu(tx_resp->initial_rate), 1736 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1737 ssn, next_reclaimed, seq_ctl); 1738 1739 rcu_read_lock(); 1740 1741 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1742 /* 1743 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1744 * the firmware while we still have packets for it in the Tx queues. 1745 */ 1746 if (WARN_ON_ONCE(!sta)) 1747 goto out; 1748 1749 if (!IS_ERR(sta)) { 1750 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1751 1752 iwl_mvm_tx_airtime(mvm, mvmsta, 1753 le16_to_cpu(tx_resp->wireless_media_time)); 1754 1755 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1756 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1757 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1758 1759 if (sta->wme && tid != IWL_MGMT_TID) { 1760 struct iwl_mvm_tid_data *tid_data = 1761 &mvmsta->tid_data[tid]; 1762 bool send_eosp_ndp = false; 1763 1764 spin_lock_bh(&mvmsta->lock); 1765 1766 if (!is_ndp) { 1767 tid_data->next_reclaimed = next_reclaimed; 1768 IWL_DEBUG_TX_REPLY(mvm, 1769 "Next reclaimed packet:%d\n", 1770 next_reclaimed); 1771 if (tid < IWL_MAX_TID_COUNT) 1772 iwl_mvm_count_mpdu(mvmsta, sta_id, 1, 1773 true, 0); 1774 } else { 1775 IWL_DEBUG_TX_REPLY(mvm, 1776 "NDP - don't update next_reclaimed\n"); 1777 } 1778 1779 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1780 1781 if (mvmsta->sleep_tx_count) { 1782 mvmsta->sleep_tx_count--; 1783 if (mvmsta->sleep_tx_count && 1784 !iwl_mvm_tid_queued(mvm, tid_data)) { 1785 /* 1786 * The number of frames in the queue 1787 * dropped to 0 even if we sent less 1788 * frames than we thought we had on the 1789 * Tx queue. 1790 * This means we had holes in the BA 1791 * window that we just filled, ask 1792 * mac80211 to send EOSP since the 1793 * firmware won't know how to do that. 1794 * Send NDP and the firmware will send 1795 * EOSP notification that will trigger 1796 * a call to ieee80211_sta_eosp(). 1797 */ 1798 send_eosp_ndp = true; 1799 } 1800 } 1801 1802 spin_unlock_bh(&mvmsta->lock); 1803 if (send_eosp_ndp) { 1804 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1805 IEEE80211_FRAME_RELEASE_UAPSD, 1806 1, tid, false, false); 1807 mvmsta->sleep_tx_count = 0; 1808 ieee80211_send_eosp_nullfunc(sta, tid); 1809 } 1810 } 1811 1812 if (mvmsta->next_status_eosp) { 1813 mvmsta->next_status_eosp = false; 1814 ieee80211_sta_eosp(sta); 1815 } 1816 } 1817 out: 1818 rcu_read_unlock(); 1819 } 1820 1821 #ifdef CONFIG_IWLWIFI_DEBUG 1822 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1823 static const char *iwl_get_agg_tx_status(u16 status) 1824 { 1825 switch (status & AGG_TX_STATE_STATUS_MSK) { 1826 AGG_TX_STATE_(TRANSMITTED); 1827 AGG_TX_STATE_(UNDERRUN); 1828 AGG_TX_STATE_(BT_PRIO); 1829 AGG_TX_STATE_(FEW_BYTES); 1830 AGG_TX_STATE_(ABORT); 1831 AGG_TX_STATE_(TX_ON_AIR_DROP); 1832 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1833 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1834 AGG_TX_STATE_(SCD_QUERY); 1835 AGG_TX_STATE_(TEST_BAD_CRC32); 1836 AGG_TX_STATE_(RESPONSE); 1837 AGG_TX_STATE_(DUMP_TX); 1838 AGG_TX_STATE_(DELAY_TX); 1839 } 1840 1841 return "UNKNOWN"; 1842 } 1843 1844 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1845 struct iwl_rx_packet *pkt) 1846 { 1847 struct iwl_tx_resp *tx_resp = (void *)pkt->data; 1848 struct agg_tx_status *frame_status = 1849 iwl_mvm_get_agg_status(mvm, tx_resp); 1850 int i; 1851 bool tirgger_timepoint = false; 1852 1853 for (i = 0; i < tx_resp->frame_count; i++) { 1854 u16 fstatus = le16_to_cpu(frame_status[i].status); 1855 /* In case one frame wasn't transmitted trigger time point */ 1856 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1857 AGG_TX_STATE_TRANSMITTED); 1858 IWL_DEBUG_TX_REPLY(mvm, 1859 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1860 iwl_get_agg_tx_status(fstatus), 1861 fstatus & AGG_TX_STATE_STATUS_MSK, 1862 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1863 AGG_TX_STATE_TRY_CNT_POS, 1864 le16_to_cpu(frame_status[i].sequence)); 1865 } 1866 1867 if (tirgger_timepoint) 1868 iwl_dbg_tlv_time_point(&mvm->fwrt, 1869 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1870 1871 } 1872 #else 1873 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1874 struct iwl_rx_packet *pkt) 1875 {} 1876 #endif /* CONFIG_IWLWIFI_DEBUG */ 1877 1878 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1879 struct iwl_rx_packet *pkt) 1880 { 1881 struct iwl_tx_resp *tx_resp = (void *)pkt->data; 1882 int sta_id = IWL_TX_RES_GET_RA(tx_resp->ra_tid); 1883 int tid = IWL_TX_RES_GET_TID(tx_resp->ra_tid); 1884 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1885 struct iwl_mvm_sta *mvmsta; 1886 int queue = SEQ_TO_QUEUE(sequence); 1887 struct ieee80211_sta *sta; 1888 1889 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1890 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1891 return; 1892 1893 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1894 1895 rcu_read_lock(); 1896 1897 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1898 1899 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1900 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) { 1901 rcu_read_unlock(); 1902 return; 1903 } 1904 1905 if (!WARN_ON_ONCE(!mvmsta)) { 1906 mvmsta->tid_data[tid].rate_n_flags = 1907 tx_resp->initial_rate; 1908 mvmsta->tid_data[tid].tx_time = 1909 le16_to_cpu(tx_resp->wireless_media_time); 1910 mvmsta->tid_data[tid].lq_color = 1911 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1912 iwl_mvm_tx_airtime(mvm, mvmsta, 1913 le16_to_cpu(tx_resp->wireless_media_time)); 1914 } 1915 1916 rcu_read_unlock(); 1917 } 1918 1919 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1920 { 1921 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1922 struct iwl_tx_resp *tx_resp = (void *)pkt->data; 1923 1924 if (tx_resp->frame_count == 1) 1925 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1926 else 1927 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1928 } 1929 1930 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1931 int txq, int index, 1932 struct ieee80211_tx_info *tx_info, __le32 rate, 1933 bool is_flush) 1934 { 1935 struct sk_buff_head reclaimed_skbs; 1936 struct iwl_mvm_tid_data *tid_data = NULL; 1937 struct ieee80211_sta *sta; 1938 struct iwl_mvm_sta *mvmsta = NULL; 1939 struct sk_buff *skb; 1940 int freed; 1941 1942 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1943 tid > IWL_MAX_TID_COUNT, 1944 "sta_id %d tid %d", sta_id, tid)) 1945 return; 1946 1947 rcu_read_lock(); 1948 1949 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1950 1951 /* Reclaiming frames for a station that has been deleted ? */ 1952 if (WARN_ON_ONCE(!sta)) { 1953 rcu_read_unlock(); 1954 return; 1955 } 1956 1957 __skb_queue_head_init(&reclaimed_skbs); 1958 1959 /* 1960 * Release all TFDs before the SSN, i.e. all TFDs in front of 1961 * block-ack window (we assume that they've been successfully 1962 * transmitted ... if not, it's too late anyway). 1963 */ 1964 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush); 1965 1966 skb_queue_walk(&reclaimed_skbs, skb) { 1967 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1968 1969 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1970 1971 memset(&info->status, 0, sizeof(info->status)); 1972 /* Packet was transmitted successfully, failures come as single 1973 * frames because before failing a frame the firmware transmits 1974 * it without aggregation at least once. 1975 */ 1976 if (!is_flush) 1977 info->flags |= IEEE80211_TX_STAT_ACK; 1978 else 1979 info->flags &= ~IEEE80211_TX_STAT_ACK; 1980 } 1981 1982 /* 1983 * It's possible to get a BA response after invalidating the rcu (rcu is 1984 * invalidated in order to prevent new Tx from being sent, but there may 1985 * be some frames already in-flight). 1986 * In this case we just want to reclaim, and could skip all the 1987 * sta-dependent stuff since it's in the middle of being removed 1988 * anyways. 1989 */ 1990 if (IS_ERR(sta)) 1991 goto out; 1992 1993 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1994 tid_data = &mvmsta->tid_data[tid]; 1995 1996 if (tid_data->txq_id != txq) { 1997 IWL_ERR(mvm, 1998 "invalid reclaim request: Q %d, tid %d\n", 1999 tid_data->txq_id, tid); 2000 rcu_read_unlock(); 2001 return; 2002 } 2003 2004 spin_lock_bh(&mvmsta->lock); 2005 2006 tid_data->next_reclaimed = index; 2007 2008 iwl_mvm_check_ratid_empty(mvm, sta, tid); 2009 2010 freed = 0; 2011 2012 /* pack lq color from tid_data along the reduced txp */ 2013 tx_info->status.status_driver_data[0] = 2014 RS_DRV_DATA_PACK(tid_data->lq_color, 2015 tx_info->status.status_driver_data[0]); 2016 /* the value is only consumed for old FW that has v1 rates anyway */ 2017 tx_info->status.status_driver_data[1] = 2018 (void *)(uintptr_t)le32_to_cpu(rate); 2019 2020 skb_queue_walk(&reclaimed_skbs, skb) { 2021 struct ieee80211_hdr *hdr = (void *)skb->data; 2022 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2023 2024 if (!is_flush) { 2025 if (ieee80211_is_data_qos(hdr->frame_control)) 2026 freed++; 2027 else 2028 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 2029 } 2030 2031 /* this is the first skb we deliver in this batch */ 2032 /* put the rate scaling data there */ 2033 if (freed == 1) { 2034 info->flags |= IEEE80211_TX_STAT_AMPDU; 2035 memcpy(&info->status, &tx_info->status, 2036 sizeof(tx_info->status)); 2037 iwl_mvm_hwrate_to_tx_status(mvm, rate, info); 2038 } 2039 } 2040 2041 spin_unlock_bh(&mvmsta->lock); 2042 2043 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 2044 * possible (i.e. first MPDU in the aggregation wasn't acked) 2045 * Still it's important to update RS about sent vs. acked. 2046 */ 2047 if (!is_flush && skb_queue_empty(&reclaimed_skbs) && 2048 !iwl_mvm_has_tlc_offload(mvm)) { 2049 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 2050 2051 /* no TLC offload, so non-MLD mode */ 2052 if (mvmsta->vif) 2053 chanctx_conf = 2054 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf); 2055 2056 if (WARN_ON_ONCE(!chanctx_conf)) 2057 goto out; 2058 2059 tx_info->band = chanctx_conf->def.chan->band; 2060 iwl_mvm_hwrate_to_tx_status(mvm, rate, tx_info); 2061 2062 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 2063 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 2064 } 2065 2066 out: 2067 rcu_read_unlock(); 2068 2069 while (!skb_queue_empty(&reclaimed_skbs)) { 2070 skb = __skb_dequeue(&reclaimed_skbs); 2071 ieee80211_tx_status_skb(mvm->hw, skb); 2072 } 2073 } 2074 2075 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2076 { 2077 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2078 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 2079 int sta_id, tid, txq, index; 2080 struct ieee80211_tx_info ba_info = {}; 2081 struct iwl_mvm_ba_notif *ba_notif; 2082 struct iwl_mvm_tid_data *tid_data; 2083 struct iwl_mvm_sta *mvmsta; 2084 2085 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 2086 2087 if (iwl_mvm_has_new_tx_api(mvm)) { 2088 struct iwl_compressed_ba_notif *ba_res = 2089 (void *)pkt->data; 2090 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 2091 u16 tfd_cnt; 2092 int i; 2093 2094 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len, 2095 "short BA notification (%d)\n", pkt_len)) 2096 return; 2097 2098 sta_id = ba_res->sta_id; 2099 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 2100 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 2101 ba_info.status.tx_time = 2102 (u16)le32_to_cpu(ba_res->wireless_time); 2103 ba_info.status.status_driver_data[0] = 2104 (void *)(uintptr_t)ba_res->reduced_txp; 2105 2106 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 2107 if (!tfd_cnt) 2108 return; 2109 2110 if (IWL_FW_CHECK(mvm, 2111 struct_size(ba_res, tfd, tfd_cnt) > pkt_len, 2112 "short BA notification (tfds:%d, size:%d)\n", 2113 tfd_cnt, pkt_len)) 2114 return; 2115 2116 IWL_DEBUG_TX_REPLY(mvm, 2117 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2118 sta_id, le32_to_cpu(ba_res->flags), 2119 le16_to_cpu(ba_res->txed), 2120 le16_to_cpu(ba_res->done)); 2121 2122 rcu_read_lock(); 2123 2124 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2125 /* 2126 * It's possible to get a BA response after invalidating the rcu 2127 * (rcu is invalidated in order to prevent new Tx from being 2128 * sent, but there may be some frames already in-flight). 2129 * In this case we just want to reclaim, and could skip all the 2130 * sta-dependent stuff since it's in the middle of being removed 2131 * anyways. 2132 */ 2133 2134 /* Free per TID */ 2135 for (i = 0; i < tfd_cnt; i++) { 2136 struct iwl_compressed_ba_tfd *ba_tfd = &ba_res->tfd[i]; 2137 2138 tid = ba_tfd->tid; 2139 if (tid == IWL_MGMT_TID) 2140 tid = IWL_MAX_TID_COUNT; 2141 2142 if (mvmsta) 2143 mvmsta->tid_data[i].lq_color = lq_color; 2144 2145 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 2146 (int)(le16_to_cpu(ba_tfd->q_num)), 2147 le16_to_cpu(ba_tfd->tfd_index), 2148 &ba_info, 2149 ba_res->tx_rate, false); 2150 } 2151 2152 if (mvmsta) { 2153 iwl_mvm_tx_airtime(mvm, mvmsta, 2154 le32_to_cpu(ba_res->wireless_time)); 2155 2156 iwl_mvm_count_mpdu(mvmsta, sta_id, 2157 le16_to_cpu(ba_res->txed), true, 0); 2158 } 2159 rcu_read_unlock(); 2160 return; 2161 } 2162 2163 ba_notif = (void *)pkt->data; 2164 sta_id = ba_notif->sta_id; 2165 tid = ba_notif->tid; 2166 /* "flow" corresponds to Tx queue */ 2167 txq = le16_to_cpu(ba_notif->scd_flow); 2168 /* "ssn" is start of block-ack Tx window, corresponds to index 2169 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2170 index = le16_to_cpu(ba_notif->scd_ssn); 2171 2172 rcu_read_lock(); 2173 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2174 if (IWL_FW_CHECK(mvm, !mvmsta, 2175 "invalid STA ID %d in BA notif\n", 2176 sta_id)) { 2177 rcu_read_unlock(); 2178 return; 2179 } 2180 2181 tid_data = &mvmsta->tid_data[tid]; 2182 2183 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2184 ba_info.status.ampdu_len = ba_notif->txed; 2185 ba_info.status.tx_time = tid_data->tx_time; 2186 ba_info.status.status_driver_data[0] = 2187 (void *)(uintptr_t)ba_notif->reduced_txp; 2188 2189 rcu_read_unlock(); 2190 2191 IWL_DEBUG_TX_REPLY(mvm, 2192 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2193 ba_notif->sta_addr, ba_notif->sta_id); 2194 2195 IWL_DEBUG_TX_REPLY(mvm, 2196 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2197 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2198 le64_to_cpu(ba_notif->bitmap), txq, index, 2199 ba_notif->txed, ba_notif->txed_2_done); 2200 2201 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2202 ba_notif->reduced_txp); 2203 2204 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2205 tid_data->rate_n_flags, false); 2206 } 2207 2208 /* 2209 * Note that there are transports that buffer frames before they reach 2210 * the firmware. This means that after flush_tx_path is called, the 2211 * queue might not be empty. The race-free way to handle this is to: 2212 * 1) set the station as draining 2213 * 2) flush the Tx path 2214 * 3) wait for the transport queues to be empty 2215 */ 2216 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2217 { 2218 int ret; 2219 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2220 .queues_ctl = cpu_to_le32(tfd_msk), 2221 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2222 }; 2223 2224 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2225 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2226 sizeof(flush_cmd), &flush_cmd); 2227 if (ret) 2228 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2229 return ret; 2230 } 2231 2232 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2233 { 2234 int ret; 2235 struct iwl_tx_path_flush_cmd_rsp *rsp; 2236 struct iwl_tx_path_flush_cmd flush_cmd = { 2237 .sta_id = cpu_to_le32(sta_id), 2238 .tid_mask = cpu_to_le16(tids), 2239 }; 2240 2241 struct iwl_host_cmd cmd = { 2242 .id = TXPATH_FLUSH, 2243 .len = { sizeof(flush_cmd), }, 2244 .data = { &flush_cmd, }, 2245 }; 2246 2247 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2248 2249 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2250 cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL; 2251 2252 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2253 sta_id, tids); 2254 2255 ret = iwl_mvm_send_cmd(mvm, &cmd); 2256 2257 if (ret) { 2258 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2259 return ret; 2260 } 2261 2262 if (cmd.flags & CMD_WANT_SKB) { 2263 int i; 2264 int num_flushed_queues; 2265 2266 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2267 ret = -EIO; 2268 goto free_rsp; 2269 } 2270 2271 rsp = (void *)cmd.resp_pkt->data; 2272 2273 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2274 "sta_id %d != rsp_sta_id %d", 2275 sta_id, le16_to_cpu(rsp->sta_id))) { 2276 ret = -EIO; 2277 goto free_rsp; 2278 } 2279 2280 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2281 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2282 "num_flushed_queues %d", num_flushed_queues)) { 2283 ret = -EIO; 2284 goto free_rsp; 2285 } 2286 2287 for (i = 0; i < num_flushed_queues; i++) { 2288 struct ieee80211_tx_info tx_info = {}; 2289 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2290 int tid = le16_to_cpu(queue_info->tid); 2291 int read_before = le16_to_cpu(queue_info->read_before_flush); 2292 int read_after = le16_to_cpu(queue_info->read_after_flush); 2293 int queue_num = le16_to_cpu(queue_info->queue_num); 2294 2295 if (tid == IWL_MGMT_TID) 2296 tid = IWL_MAX_TID_COUNT; 2297 2298 IWL_DEBUG_TX_QUEUES(mvm, 2299 "tid %d queue_id %d read-before %d read-after %d\n", 2300 tid, queue_num, read_before, read_after); 2301 2302 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2303 &tx_info, 0, true); 2304 } 2305 free_rsp: 2306 iwl_free_resp(&cmd); 2307 } 2308 return ret; 2309 } 2310 2311 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask) 2312 { 2313 if (iwl_mvm_has_new_tx_api(mvm)) 2314 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff); 2315 2316 return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask); 2317 } 2318