1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2022 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH 6 */ 7 #include <linux/ieee80211.h> 8 #include <linux/etherdevice.h> 9 #include <linux/tcp.h> 10 #include <net/ip.h> 11 #include <net/ipv6.h> 12 13 #include "iwl-trans.h" 14 #include "iwl-eeprom-parse.h" 15 #include "mvm.h" 16 #include "sta.h" 17 #include "time-sync.h" 18 19 static void 20 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 21 u16 tid, u16 ssn) 22 { 23 struct iwl_fw_dbg_trigger_tlv *trig; 24 struct iwl_fw_dbg_trigger_ba *ba_trig; 25 26 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA); 27 if (!trig) 28 return; 29 30 ba_trig = (void *)trig->data; 31 32 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 33 return; 34 35 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 36 "BAR sent to %pM, tid %d, ssn %d", 37 addr, tid, ssn); 38 } 39 40 #define OPT_HDR(type, skb, off) \ 41 (type *)(skb_network_header(skb) + (off)) 42 43 static u16 iwl_mvm_tx_csum_pre_bz(struct iwl_mvm *mvm, struct sk_buff *skb, 44 struct ieee80211_tx_info *info, bool amsdu) 45 { 46 struct ieee80211_hdr *hdr = (void *)skb->data; 47 u16 offload_assist = 0; 48 #if IS_ENABLED(CONFIG_INET) 49 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 50 u8 protocol = 0; 51 52 /* Do not compute checksum if already computed */ 53 if (skb->ip_summed != CHECKSUM_PARTIAL) 54 goto out; 55 56 /* We do not expect to be requested to csum stuff we do not support */ 57 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 58 (skb->protocol != htons(ETH_P_IP) && 59 skb->protocol != htons(ETH_P_IPV6)), 60 "No support for requested checksum\n")) { 61 skb_checksum_help(skb); 62 goto out; 63 } 64 65 if (skb->protocol == htons(ETH_P_IP)) { 66 protocol = ip_hdr(skb)->protocol; 67 } else { 68 #if IS_ENABLED(CONFIG_IPV6) 69 struct ipv6hdr *ipv6h = 70 (struct ipv6hdr *)skb_network_header(skb); 71 unsigned int off = sizeof(*ipv6h); 72 73 protocol = ipv6h->nexthdr; 74 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 75 struct ipv6_opt_hdr *hp; 76 77 /* only supported extension headers */ 78 if (protocol != NEXTHDR_ROUTING && 79 protocol != NEXTHDR_HOP && 80 protocol != NEXTHDR_DEST) { 81 skb_checksum_help(skb); 82 goto out; 83 } 84 85 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 86 protocol = hp->nexthdr; 87 off += ipv6_optlen(hp); 88 } 89 /* if we get here - protocol now should be TCP/UDP */ 90 #endif 91 } 92 93 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 94 WARN_ON_ONCE(1); 95 skb_checksum_help(skb); 96 goto out; 97 } 98 99 /* enable L4 csum */ 100 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 101 102 /* 103 * Set offset to IP header (snap). 104 * We don't support tunneling so no need to take care of inner header. 105 * Size is in words. 106 */ 107 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 108 109 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 110 if (skb->protocol == htons(ETH_P_IP) && amsdu) { 111 ip_hdr(skb)->check = 0; 112 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 113 } 114 115 /* reset UDP/TCP header csum */ 116 if (protocol == IPPROTO_TCP) 117 tcp_hdr(skb)->check = 0; 118 else 119 udp_hdr(skb)->check = 0; 120 121 /* 122 * mac header len should include IV, size is in words unless 123 * the IV is added by the firmware like in WEP. 124 * In new Tx API, the IV is always added by the firmware. 125 */ 126 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 127 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 128 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 129 mh_len += info->control.hw_key->iv_len; 130 mh_len /= 2; 131 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 132 133 out: 134 #endif 135 if (amsdu) 136 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 137 else if (ieee80211_hdrlen(hdr->frame_control) % 4) 138 /* padding is inserted later in transport */ 139 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 140 141 return offload_assist; 142 } 143 144 u32 iwl_mvm_tx_csum_bz(struct iwl_mvm *mvm, struct sk_buff *skb, bool amsdu) 145 { 146 struct ieee80211_hdr *hdr = (void *)skb->data; 147 u32 offload_assist = IWL_TX_CMD_OFFLD_BZ_PARTIAL_CSUM; 148 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 149 unsigned int csum_start = skb_checksum_start_offset(skb); 150 151 offload_assist |= u32_encode_bits(hdrlen / 2, 152 IWL_TX_CMD_OFFLD_BZ_MH_LEN); 153 if (amsdu) 154 offload_assist |= IWL_TX_CMD_OFFLD_BZ_AMSDU; 155 else if (hdrlen % 4) 156 /* padding is inserted later in transport */ 157 offload_assist |= IWL_TX_CMD_OFFLD_BZ_MH_PAD; 158 159 if (skb->ip_summed != CHECKSUM_PARTIAL) 160 return offload_assist; 161 162 offload_assist |= IWL_TX_CMD_OFFLD_BZ_ENABLE_CSUM | 163 IWL_TX_CMD_OFFLD_BZ_ZERO2ONES; 164 165 /* 166 * mac80211 will always calculate checksum in software for 167 * non-fast-xmit, and so we can only do offloaded checksum 168 * for fast-xmit frames. In this case, we always have the 169 * RFC 1042 header present. skb_checksum_start_offset() 170 * returns the offset from the beginning, but the hardware 171 * needs it from after the header & SNAP header. 172 */ 173 csum_start -= hdrlen + 8; 174 175 offload_assist |= u32_encode_bits(csum_start, 176 IWL_TX_CMD_OFFLD_BZ_START_OFFS); 177 offload_assist |= u32_encode_bits(csum_start + skb->csum_offset, 178 IWL_TX_CMD_OFFLD_BZ_RESULT_OFFS); 179 180 return offload_assist; 181 } 182 183 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 184 struct ieee80211_tx_info *info, 185 bool amsdu) 186 { 187 if (!iwl_mvm_has_new_tx_csum(mvm)) 188 return iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu); 189 return iwl_mvm_tx_csum_bz(mvm, skb, amsdu); 190 } 191 192 /* 193 * Sets most of the Tx cmd's fields 194 */ 195 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 196 struct iwl_tx_cmd *tx_cmd, 197 struct ieee80211_tx_info *info, u8 sta_id) 198 { 199 struct ieee80211_hdr *hdr = (void *)skb->data; 200 __le16 fc = hdr->frame_control; 201 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 202 u32 len = skb->len + FCS_LEN; 203 bool amsdu = false; 204 u8 ac; 205 206 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) || 207 (ieee80211_is_probe_resp(fc) && 208 !is_multicast_ether_addr(hdr->addr1))) 209 tx_flags |= TX_CMD_FLG_ACK; 210 else 211 tx_flags &= ~TX_CMD_FLG_ACK; 212 213 if (ieee80211_is_probe_resp(fc)) 214 tx_flags |= TX_CMD_FLG_TSF; 215 216 if (ieee80211_has_morefrags(fc)) 217 tx_flags |= TX_CMD_FLG_MORE_FRAG; 218 219 if (ieee80211_is_data_qos(fc)) { 220 u8 *qc = ieee80211_get_qos_ctl(hdr); 221 tx_cmd->tid_tspec = qc[0] & 0xf; 222 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 223 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 224 } else if (ieee80211_is_back_req(fc)) { 225 struct ieee80211_bar *bar = (void *)skb->data; 226 u16 control = le16_to_cpu(bar->control); 227 u16 ssn = le16_to_cpu(bar->start_seq_num); 228 229 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 230 tx_cmd->tid_tspec = (control & 231 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 232 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 233 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 234 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 235 ssn); 236 } else { 237 if (ieee80211_is_data(fc)) 238 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 239 else 240 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT; 241 242 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 243 tx_flags |= TX_CMD_FLG_SEQ_CTL; 244 else 245 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 246 } 247 248 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */ 249 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 250 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 251 else 252 ac = tid_to_mac80211_ac[0]; 253 254 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 255 TX_CMD_FLG_BT_PRIO_POS; 256 257 if (ieee80211_is_mgmt(fc)) { 258 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 259 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 260 else if (ieee80211_is_action(fc)) 261 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 262 else 263 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 264 265 /* The spec allows Action frames in A-MPDU, we don't support 266 * it 267 */ 268 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 269 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 270 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 271 } else { 272 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 273 } 274 275 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 276 !is_multicast_ether_addr(hdr->addr1)) 277 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 278 279 if (fw_has_capa(&mvm->fw->ucode_capa, 280 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 281 ieee80211_action_contains_tpc(skb)) 282 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 283 284 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 285 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 286 tx_cmd->len = cpu_to_le16((u16)skb->len); 287 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 288 tx_cmd->sta_id = sta_id; 289 290 tx_cmd->offload_assist = 291 cpu_to_le16(iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu)); 292 } 293 294 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, 295 struct ieee80211_tx_info *info, 296 struct ieee80211_sta *sta, __le16 fc) 297 { 298 if (info->band == NL80211_BAND_2GHZ && 299 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 300 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 301 302 if (sta && ieee80211_is_data(fc)) { 303 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 304 305 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS; 306 } 307 308 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 309 } 310 311 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 312 struct ieee80211_tx_info *info, 313 struct ieee80211_sta *sta, __le16 fc) 314 { 315 int rate_idx = -1; 316 u8 rate_plcp; 317 u32 rate_flags = 0; 318 bool is_cck; 319 320 /* info->control is only relevant for non HW rate control */ 321 if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { 322 /* HT rate doesn't make sense for a non data frame */ 323 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && 324 !ieee80211_is_data(fc), 325 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", 326 info->control.rates[0].flags, 327 info->control.rates[0].idx, 328 le16_to_cpu(fc), 329 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 330 331 rate_idx = info->control.rates[0].idx; 332 333 /* For non 2 GHZ band, remap mac80211 rate indices into driver 334 * indices. 335 */ 336 if (info->band != NL80211_BAND_2GHZ || 337 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE)) 338 rate_idx += IWL_FIRST_OFDM_RATE; 339 340 /* For 2.4 GHZ band, check that there is no need to remap */ 341 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 342 } 343 344 /* if the rate isn't a well known legacy rate, take the lowest one */ 345 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 346 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm, 347 info, 348 info->control.vif); 349 350 /* Get PLCP rate for tx_cmd->rate_n_flags */ 351 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx); 352 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE); 353 354 /* Set CCK or OFDM flag */ 355 if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) { 356 if (!is_cck) 357 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK; 358 else 359 rate_flags |= RATE_MCS_CCK_MSK; 360 } else if (is_cck) { 361 rate_flags |= RATE_MCS_CCK_MSK_V1; 362 } 363 364 return (u32)rate_plcp | rate_flags; 365 } 366 367 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 368 struct ieee80211_tx_info *info, 369 struct ieee80211_sta *sta, __le16 fc) 370 { 371 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) | 372 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 373 } 374 375 /* 376 * Sets the fields in the Tx cmd that are rate related 377 */ 378 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 379 struct ieee80211_tx_info *info, 380 struct ieee80211_sta *sta, __le16 fc) 381 { 382 /* Set retry limit on RTS packets */ 383 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 384 385 /* Set retry limit on DATA packets and Probe Responses*/ 386 if (ieee80211_is_probe_resp(fc)) { 387 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 388 tx_cmd->rts_retry_limit = 389 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 390 } else if (ieee80211_is_back_req(fc)) { 391 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 392 } else { 393 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 394 } 395 396 /* 397 * for data packets, rate info comes from the table inside the fw. This 398 * table is controlled by LINK_QUALITY commands 399 */ 400 401 if (ieee80211_is_data(fc) && sta) { 402 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 403 404 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 405 tx_cmd->initial_rate_index = 0; 406 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 407 return; 408 } 409 } else if (ieee80211_is_back_req(fc)) { 410 tx_cmd->tx_flags |= 411 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 412 } 413 414 /* Set the rate in the TX cmd */ 415 tx_cmd->rate_n_flags = 416 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 417 } 418 419 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 420 u8 *crypto_hdr) 421 { 422 struct ieee80211_key_conf *keyconf = info->control.hw_key; 423 u64 pn; 424 425 pn = atomic64_inc_return(&keyconf->tx_pn); 426 crypto_hdr[0] = pn; 427 crypto_hdr[2] = 0; 428 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 429 crypto_hdr[1] = pn >> 8; 430 crypto_hdr[4] = pn >> 16; 431 crypto_hdr[5] = pn >> 24; 432 crypto_hdr[6] = pn >> 32; 433 crypto_hdr[7] = pn >> 40; 434 } 435 436 /* 437 * Sets the fields in the Tx cmd that are crypto related 438 */ 439 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 440 struct ieee80211_tx_info *info, 441 struct iwl_tx_cmd *tx_cmd, 442 struct sk_buff *skb_frag, 443 int hdrlen) 444 { 445 struct ieee80211_key_conf *keyconf = info->control.hw_key; 446 u8 *crypto_hdr = skb_frag->data + hdrlen; 447 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 448 u64 pn; 449 450 switch (keyconf->cipher) { 451 case WLAN_CIPHER_SUITE_CCMP: 452 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 453 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 454 break; 455 456 case WLAN_CIPHER_SUITE_TKIP: 457 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 458 pn = atomic64_inc_return(&keyconf->tx_pn); 459 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 460 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 461 break; 462 463 case WLAN_CIPHER_SUITE_WEP104: 464 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 465 fallthrough; 466 case WLAN_CIPHER_SUITE_WEP40: 467 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 468 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 469 TX_CMD_SEC_WEP_KEY_IDX_MSK); 470 471 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 472 break; 473 case WLAN_CIPHER_SUITE_GCMP: 474 case WLAN_CIPHER_SUITE_GCMP_256: 475 type = TX_CMD_SEC_GCMP; 476 fallthrough; 477 case WLAN_CIPHER_SUITE_CCMP_256: 478 /* TODO: Taking the key from the table might introduce a race 479 * when PTK rekeying is done, having an old packets with a PN 480 * based on the old key but the message encrypted with a new 481 * one. 482 * Need to handle this. 483 */ 484 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 485 tx_cmd->key[0] = keyconf->hw_key_idx; 486 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 487 break; 488 default: 489 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 490 } 491 } 492 493 /* 494 * Allocates and sets the Tx cmd the driver data pointers in the skb 495 */ 496 static struct iwl_device_tx_cmd * 497 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 498 struct ieee80211_tx_info *info, int hdrlen, 499 struct ieee80211_sta *sta, u8 sta_id) 500 { 501 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 502 struct iwl_device_tx_cmd *dev_cmd; 503 struct iwl_tx_cmd *tx_cmd; 504 505 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 506 507 if (unlikely(!dev_cmd)) 508 return NULL; 509 510 dev_cmd->hdr.cmd = TX_CMD; 511 512 if (iwl_mvm_has_new_tx_api(mvm)) { 513 u32 rate_n_flags = 0; 514 u16 flags = 0; 515 struct iwl_mvm_sta *mvmsta = sta ? 516 iwl_mvm_sta_from_mac80211(sta) : NULL; 517 bool amsdu = false; 518 519 if (ieee80211_is_data_qos(hdr->frame_control)) { 520 u8 *qc = ieee80211_get_qos_ctl(hdr); 521 522 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 523 } 524 525 if (!info->control.hw_key) 526 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 527 528 /* 529 * For data packets rate info comes from the fw. Only 530 * set rate/antenna during connection establishment or in case 531 * no station is given. 532 */ 533 if (!sta || !ieee80211_is_data(hdr->frame_control) || 534 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 535 flags |= IWL_TX_FLAGS_CMD_RATE; 536 rate_n_flags = 537 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 538 hdr->frame_control); 539 } 540 541 if (mvm->trans->trans_cfg->device_family >= 542 IWL_DEVICE_FAMILY_AX210) { 543 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 544 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, 545 info, amsdu); 546 547 cmd->offload_assist = cpu_to_le32(offload_assist); 548 549 /* Total # bytes to be transmitted */ 550 cmd->len = cpu_to_le16((u16)skb->len); 551 552 /* Copy MAC header from skb into command buffer */ 553 memcpy(cmd->hdr, hdr, hdrlen); 554 555 cmd->flags = cpu_to_le16(flags); 556 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 557 } else { 558 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 559 u16 offload_assist = iwl_mvm_tx_csum_pre_bz(mvm, skb, 560 info, 561 amsdu); 562 563 cmd->offload_assist = cpu_to_le16(offload_assist); 564 565 /* Total # bytes to be transmitted */ 566 cmd->len = cpu_to_le16((u16)skb->len); 567 568 /* Copy MAC header from skb into command buffer */ 569 memcpy(cmd->hdr, hdr, hdrlen); 570 571 cmd->flags = cpu_to_le32(flags); 572 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 573 } 574 goto out; 575 } 576 577 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 578 579 if (info->control.hw_key) 580 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 581 582 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 583 584 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 585 586 /* Copy MAC header from skb into command buffer */ 587 memcpy(tx_cmd->hdr, hdr, hdrlen); 588 589 out: 590 return dev_cmd; 591 } 592 593 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 594 struct iwl_device_tx_cmd *cmd) 595 { 596 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 597 598 memset(&skb_info->status, 0, sizeof(skb_info->status)); 599 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 600 601 skb_info->driver_data[1] = cmd; 602 } 603 604 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 605 struct iwl_mvm_vif_link_info *link, 606 struct ieee80211_tx_info *info, 607 struct sk_buff *skb) 608 { 609 struct ieee80211_hdr *hdr = (void *)skb->data; 610 __le16 fc = hdr->frame_control; 611 612 switch (info->control.vif->type) { 613 case NL80211_IFTYPE_AP: 614 case NL80211_IFTYPE_ADHOC: 615 /* 616 * Non-bufferable frames use the broadcast station, thus they 617 * use the probe queue. 618 * Also take care of the case where we send a deauth to a 619 * station that we don't have, or similarly an association 620 * response (with non-success status) for a station we can't 621 * accept. 622 * Also, disassociate frames might happen, particular with 623 * reason 7 ("Class 3 frame received from nonassociated STA"). 624 */ 625 if (ieee80211_is_mgmt(fc) && 626 (!ieee80211_is_bufferable_mmpdu(skb) || 627 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 628 return link->mgmt_queue; 629 630 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 631 is_multicast_ether_addr(hdr->addr1)) 632 return link->cab_queue; 633 634 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 635 "fc=0x%02x", le16_to_cpu(fc)); 636 return link->mgmt_queue; 637 case NL80211_IFTYPE_P2P_DEVICE: 638 if (ieee80211_is_mgmt(fc)) 639 return mvm->p2p_dev_queue; 640 641 WARN_ON_ONCE(1); 642 return mvm->p2p_dev_queue; 643 default: 644 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 645 return -1; 646 } 647 } 648 649 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 650 struct sk_buff *skb) 651 { 652 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 653 struct iwl_mvm_vif *mvmvif = 654 iwl_mvm_vif_from_mac80211(info->control.vif); 655 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 656 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 657 struct iwl_probe_resp_data *resp_data; 658 const u8 *ie; 659 u8 *pos; 660 u8 match[] = { 661 (WLAN_OUI_WFA >> 16) & 0xff, 662 (WLAN_OUI_WFA >> 8) & 0xff, 663 WLAN_OUI_WFA & 0xff, 664 WLAN_OUI_TYPE_WFA_P2P, 665 }; 666 667 rcu_read_lock(); 668 669 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data); 670 if (!resp_data) 671 goto out; 672 673 if (!resp_data->notif.noa_active) 674 goto out; 675 676 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 677 mgmt->u.probe_resp.variable, 678 skb->len - base_len, 679 match, 4, 2); 680 if (!ie) { 681 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 682 goto out; 683 } 684 685 if (skb_tailroom(skb) < resp_data->noa_len) { 686 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 687 IWL_ERR(mvm, 688 "Failed to reallocate probe resp\n"); 689 goto out; 690 } 691 } 692 693 pos = skb_put(skb, resp_data->noa_len); 694 695 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 696 /* Set length of IE body (not including ID and length itself) */ 697 *pos++ = resp_data->noa_len - 2; 698 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 699 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 700 *pos++ = WLAN_OUI_WFA & 0xff; 701 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 702 703 memcpy(pos, &resp_data->notif.noa_attr, 704 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 705 706 out: 707 rcu_read_unlock(); 708 } 709 710 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 711 { 712 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 713 struct ieee80211_tx_info info; 714 struct iwl_device_tx_cmd *dev_cmd; 715 u8 sta_id; 716 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 717 __le16 fc = hdr->frame_control; 718 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 719 IEEE80211_TX_CTL_TX_OFFCHAN; 720 int queue = -1; 721 722 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 723 return -1; 724 725 memcpy(&info, skb->cb, sizeof(info)); 726 727 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 728 return -1; 729 730 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 731 return -1; 732 733 if (info.control.vif) { 734 struct iwl_mvm_vif *mvmvif = 735 iwl_mvm_vif_from_mac80211(info.control.vif); 736 737 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 738 info.control.vif->type == NL80211_IFTYPE_AP || 739 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 740 u32 link_id = u32_get_bits(info.control.flags, 741 IEEE80211_TX_CTRL_MLO_LINK); 742 struct iwl_mvm_vif_link_info *link; 743 744 if (link_id == IEEE80211_LINK_UNSPECIFIED) { 745 if (info.control.vif->active_links) 746 link_id = ffs(info.control.vif->active_links) - 1; 747 else 748 link_id = 0; 749 } 750 751 link = mvmvif->link[link_id]; 752 753 if (!ieee80211_is_data(hdr->frame_control)) 754 sta_id = link->bcast_sta.sta_id; 755 else 756 sta_id = link->mcast_sta.sta_id; 757 758 queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info, 759 skb); 760 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 761 queue = mvm->snif_queue; 762 sta_id = mvm->snif_sta.sta_id; 763 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 764 offchannel) { 765 /* 766 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 767 * that can be used in 2 different types of vifs, P2P & 768 * STATION. 769 * P2P uses the offchannel queue. 770 * STATION (HS2.0) uses the auxiliary context of the FW, 771 * and hence needs to be sent on the aux queue. 772 */ 773 sta_id = mvm->aux_sta.sta_id; 774 queue = mvm->aux_queue; 775 } 776 } 777 778 if (queue < 0) { 779 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 780 return -1; 781 } 782 783 if (unlikely(ieee80211_is_probe_resp(fc))) 784 iwl_mvm_probe_resp_set_noa(mvm, skb); 785 786 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 787 788 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 789 if (!dev_cmd) 790 return -1; 791 792 /* From now on, we cannot access info->control */ 793 iwl_mvm_skb_prepare_status(skb, dev_cmd); 794 795 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 796 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 797 return -1; 798 } 799 800 return 0; 801 } 802 803 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 804 struct ieee80211_sta *sta, unsigned int tid) 805 { 806 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 807 u8 ac = tid_to_mac80211_ac[tid]; 808 enum nl80211_band band; 809 unsigned int txf; 810 unsigned int val; 811 int lmac; 812 813 /* For HE redirect to trigger based fifos */ 814 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 815 ac += 4; 816 817 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 818 819 /* 820 * Don't send an AMSDU that will be longer than the TXF. 821 * Add a security margin of 256 for the TX command + headers. 822 * We also want to have the start of the next packet inside the 823 * fifo to be able to send bursts. 824 */ 825 val = mvmsta->max_amsdu_len; 826 827 if (hweight16(sta->valid_links) <= 1) { 828 if (sta->valid_links) { 829 struct ieee80211_bss_conf *link_conf; 830 unsigned int link = ffs(sta->valid_links) - 1; 831 832 rcu_read_lock(); 833 link_conf = rcu_dereference(mvmsta->vif->link_conf[link]); 834 if (WARN_ON(!link_conf)) 835 band = NL80211_BAND_2GHZ; 836 else 837 band = link_conf->chandef.chan->band; 838 rcu_read_unlock(); 839 } else { 840 band = mvmsta->vif->bss_conf.chandef.chan->band; 841 } 842 843 lmac = iwl_mvm_get_lmac_id(mvm->fw, band); 844 } else if (fw_has_capa(&mvm->fw->ucode_capa, 845 IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) { 846 /* for real MLO restrict to both LMACs if they exist */ 847 lmac = IWL_LMAC_5G_INDEX; 848 val = min_t(unsigned int, val, 849 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 850 lmac = IWL_LMAC_24G_INDEX; 851 } else { 852 lmac = IWL_LMAC_24G_INDEX; 853 } 854 855 return min_t(unsigned int, val, 856 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 857 } 858 859 #ifdef CONFIG_INET 860 861 static int 862 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 863 netdev_features_t netdev_flags, 864 struct sk_buff_head *mpdus_skb) 865 { 866 struct sk_buff *tmp, *next; 867 struct ieee80211_hdr *hdr = (void *)skb->data; 868 char cb[sizeof(skb->cb)]; 869 u16 i = 0; 870 unsigned int tcp_payload_len; 871 unsigned int mss = skb_shinfo(skb)->gso_size; 872 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 873 bool qos = ieee80211_is_data_qos(hdr->frame_control); 874 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 875 876 skb_shinfo(skb)->gso_size = num_subframes * mss; 877 memcpy(cb, skb->cb, sizeof(cb)); 878 879 next = skb_gso_segment(skb, netdev_flags); 880 skb_shinfo(skb)->gso_size = mss; 881 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 882 if (WARN_ON_ONCE(IS_ERR(next))) 883 return -EINVAL; 884 else if (next) 885 consume_skb(skb); 886 887 skb_list_walk_safe(next, tmp, next) { 888 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 889 /* 890 * Compute the length of all the data added for the A-MSDU. 891 * This will be used to compute the length to write in the TX 892 * command. We have: SNAP + IP + TCP for n -1 subframes and 893 * ETH header for n subframes. 894 */ 895 tcp_payload_len = skb_tail_pointer(tmp) - 896 skb_transport_header(tmp) - 897 tcp_hdrlen(tmp) + tmp->data_len; 898 899 if (ipv4) 900 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 901 902 if (tcp_payload_len > mss) { 903 skb_shinfo(tmp)->gso_size = mss; 904 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 : 905 SKB_GSO_TCPV6; 906 } else { 907 if (qos) { 908 u8 *qc; 909 910 if (ipv4) 911 ip_send_check(ip_hdr(tmp)); 912 913 qc = ieee80211_get_qos_ctl((void *)tmp->data); 914 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 915 } 916 skb_shinfo(tmp)->gso_size = 0; 917 } 918 919 skb_mark_not_on_list(tmp); 920 __skb_queue_tail(mpdus_skb, tmp); 921 i++; 922 } 923 924 return 0; 925 } 926 927 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 928 struct ieee80211_tx_info *info, 929 struct ieee80211_sta *sta, 930 struct sk_buff_head *mpdus_skb) 931 { 932 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 933 struct ieee80211_hdr *hdr = (void *)skb->data; 934 unsigned int mss = skb_shinfo(skb)->gso_size; 935 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 936 u16 snap_ip_tcp, pad; 937 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 938 u8 tid; 939 940 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 941 tcp_hdrlen(skb); 942 943 if (!mvmsta->max_amsdu_len || 944 !ieee80211_is_data_qos(hdr->frame_control) || 945 !mvmsta->amsdu_enabled) 946 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 947 948 /* 949 * Do not build AMSDU for IPv6 with extension headers. 950 * ask stack to segment and checkum the generated MPDUs for us. 951 */ 952 if (skb->protocol == htons(ETH_P_IPV6) && 953 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 954 IPPROTO_TCP) { 955 netdev_flags &= ~NETIF_F_CSUM_MASK; 956 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 957 } 958 959 tid = ieee80211_get_tid(hdr); 960 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 961 return -EINVAL; 962 963 /* 964 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 965 * during an BA session. 966 */ 967 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 968 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 969 !(mvmsta->amsdu_enabled & BIT(tid))) 970 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 971 972 /* 973 * Take the min of ieee80211 station and mvm station 974 */ 975 max_amsdu_len = 976 min_t(unsigned int, sta->cur->max_amsdu_len, 977 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 978 979 /* 980 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 981 * supported. This is a spec requirement (IEEE 802.11-2015 982 * section 8.7.3 NOTE 3). 983 */ 984 if (info->flags & IEEE80211_TX_CTL_AMPDU && 985 !sta->deflink.vht_cap.vht_supported) 986 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 987 988 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 989 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 990 pad = (4 - subf_len) & 0x3; 991 992 /* 993 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 994 * N * subf_len + (N - 1) * pad. 995 */ 996 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 997 998 if (sta->max_amsdu_subframes && 999 num_subframes > sta->max_amsdu_subframes) 1000 num_subframes = sta->max_amsdu_subframes; 1001 1002 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1003 tcp_hdrlen(skb) + skb->data_len; 1004 1005 /* 1006 * Make sure we have enough TBs for the A-MSDU: 1007 * 2 for each subframe 1008 * 1 more for each fragment 1009 * 1 more for the potential data in the header 1010 */ 1011 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 1012 mvm->trans->max_skb_frags) 1013 num_subframes = 1; 1014 1015 if (num_subframes > 1) 1016 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1017 1018 /* This skb fits in one single A-MSDU */ 1019 if (num_subframes * mss >= tcp_payload_len) { 1020 __skb_queue_tail(mpdus_skb, skb); 1021 return 0; 1022 } 1023 1024 /* 1025 * Trick the segmentation function to make it 1026 * create SKBs that can fit into one A-MSDU. 1027 */ 1028 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 1029 mpdus_skb); 1030 } 1031 #else /* CONFIG_INET */ 1032 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 1033 struct ieee80211_tx_info *info, 1034 struct ieee80211_sta *sta, 1035 struct sk_buff_head *mpdus_skb) 1036 { 1037 /* Impossible to get TSO with CONFIG_INET */ 1038 WARN_ON(1); 1039 1040 return -1; 1041 } 1042 #endif 1043 1044 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1045 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1046 { 1047 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1048 unsigned long now = jiffies; 1049 int tid; 1050 1051 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1052 return false; 1053 1054 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1055 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1056 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1057 return true; 1058 } 1059 1060 return false; 1061 } 1062 1063 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1064 struct iwl_mvm_sta *mvmsta, 1065 int airtime) 1066 { 1067 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1068 struct iwl_mvm_tcm_mac *mdata; 1069 1070 if (mac >= NUM_MAC_INDEX_DRIVER) 1071 return; 1072 1073 mdata = &mvm->tcm.data[mac]; 1074 1075 if (mvm->tcm.paused) 1076 return; 1077 1078 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1079 schedule_delayed_work(&mvm->tcm.work, 0); 1080 1081 mdata->tx.airtime += airtime; 1082 } 1083 1084 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1085 struct iwl_mvm_sta *mvmsta, int tid) 1086 { 1087 u32 ac = tid_to_mac80211_ac[tid]; 1088 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1089 struct iwl_mvm_tcm_mac *mdata; 1090 1091 if (mac >= NUM_MAC_INDEX_DRIVER) 1092 return -EINVAL; 1093 1094 mdata = &mvm->tcm.data[mac]; 1095 1096 mdata->tx.pkts[ac]++; 1097 1098 return 0; 1099 } 1100 1101 /* 1102 * Sets the fields in the Tx cmd that are crypto related. 1103 * 1104 * This function must be called with BHs disabled. 1105 */ 1106 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1107 struct ieee80211_tx_info *info, 1108 struct ieee80211_sta *sta) 1109 { 1110 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1111 struct iwl_mvm_sta *mvmsta; 1112 struct iwl_device_tx_cmd *dev_cmd; 1113 __le16 fc; 1114 u16 seq_number = 0; 1115 u8 tid = IWL_MAX_TID_COUNT; 1116 u16 txq_id; 1117 bool is_ampdu = false; 1118 int hdrlen; 1119 1120 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1121 fc = hdr->frame_control; 1122 hdrlen = ieee80211_hdrlen(fc); 1123 1124 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1125 return -1; 1126 1127 if (WARN_ON_ONCE(!mvmsta)) 1128 return -1; 1129 1130 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1131 return -1; 1132 1133 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he) 1134 return -1; 1135 1136 if (unlikely(ieee80211_is_probe_resp(fc))) 1137 iwl_mvm_probe_resp_set_noa(mvm, skb); 1138 1139 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1140 sta, mvmsta->deflink.sta_id); 1141 if (!dev_cmd) 1142 goto drop; 1143 1144 /* 1145 * we handle that entirely ourselves -- for uAPSD the firmware 1146 * will always send a notification, and for PS-Poll responses 1147 * we'll notify mac80211 when getting frame status 1148 */ 1149 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1150 1151 spin_lock(&mvmsta->lock); 1152 1153 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1154 * the conditions of !ieee80211_is_qos_nullfunc(fc) and 1155 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID 1156 */ 1157 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1158 tid = ieee80211_get_tid(hdr); 1159 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1160 goto drop_unlock_sta; 1161 1162 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1163 if (WARN_ONCE(is_ampdu && 1164 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1165 "Invalid internal agg state %d for TID %d", 1166 mvmsta->tid_data[tid].state, tid)) 1167 goto drop_unlock_sta; 1168 1169 seq_number = mvmsta->tid_data[tid].seq_number; 1170 seq_number &= IEEE80211_SCTL_SEQ; 1171 1172 if (!iwl_mvm_has_new_tx_api(mvm)) { 1173 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1174 1175 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1176 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1177 /* update the tx_cmd hdr as it was already copied */ 1178 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1179 } 1180 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) && 1181 !ieee80211_is_nullfunc(fc)) { 1182 tid = IWL_TID_NON_QOS; 1183 } 1184 1185 txq_id = mvmsta->tid_data[tid].txq_id; 1186 1187 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1188 1189 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1190 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1191 spin_unlock(&mvmsta->lock); 1192 return -1; 1193 } 1194 1195 if (!iwl_mvm_has_new_tx_api(mvm)) { 1196 /* Keep track of the time of the last frame for this RA/TID */ 1197 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1198 1199 /* 1200 * If we have timed-out TIDs - schedule the worker that will 1201 * reconfig the queues and update them 1202 * 1203 * Note that the no lock is taken here in order to not serialize 1204 * the TX flow. This isn't dangerous because scheduling 1205 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1206 * schedule it due to some race condition then next TX we get 1207 * here we will. 1208 */ 1209 if (unlikely(mvm->queue_info[txq_id].status == 1210 IWL_MVM_QUEUE_SHARED && 1211 iwl_mvm_txq_should_update(mvm, txq_id))) 1212 schedule_work(&mvm->add_stream_wk); 1213 } 1214 1215 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1216 mvmsta->deflink.sta_id, tid, txq_id, 1217 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1218 1219 /* From now on, we cannot access info->control */ 1220 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1221 1222 /* 1223 * The IV is introduced by the HW for new tx api, and it is not present 1224 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the 1225 * IV for those devices. 1226 */ 1227 if (ieee80211_is_data(fc)) 1228 iwl_mvm_mei_tx_copy_to_csme(mvm, skb, 1229 info->control.hw_key && 1230 !iwl_mvm_has_new_tx_api(mvm) ? 1231 info->control.hw_key->iv_len : 0); 1232 1233 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1234 goto drop_unlock_sta; 1235 1236 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1237 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1238 1239 spin_unlock(&mvmsta->lock); 1240 1241 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1242 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1243 goto drop; 1244 1245 return 0; 1246 1247 drop_unlock_sta: 1248 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1249 spin_unlock(&mvmsta->lock); 1250 drop: 1251 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id, 1252 tid); 1253 return -1; 1254 } 1255 1256 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1257 struct ieee80211_sta *sta) 1258 { 1259 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1260 struct ieee80211_tx_info info; 1261 struct sk_buff_head mpdus_skbs; 1262 unsigned int payload_len; 1263 int ret; 1264 struct sk_buff *orig_skb = skb; 1265 1266 if (WARN_ON_ONCE(!mvmsta)) 1267 return -1; 1268 1269 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1270 return -1; 1271 1272 memcpy(&info, skb->cb, sizeof(info)); 1273 1274 if (!skb_is_gso(skb)) 1275 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1276 1277 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1278 tcp_hdrlen(skb) + skb->data_len; 1279 1280 if (payload_len <= skb_shinfo(skb)->gso_size) 1281 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1282 1283 __skb_queue_head_init(&mpdus_skbs); 1284 1285 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1286 if (ret) 1287 return ret; 1288 1289 WARN_ON(skb_queue_empty(&mpdus_skbs)); 1290 1291 while (!skb_queue_empty(&mpdus_skbs)) { 1292 skb = __skb_dequeue(&mpdus_skbs); 1293 1294 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1295 if (ret) { 1296 /* Free skbs created as part of TSO logic that have not yet been dequeued */ 1297 __skb_queue_purge(&mpdus_skbs); 1298 /* skb here is not necessarily same as skb that entered this method, 1299 * so free it explicitly. 1300 */ 1301 if (skb == orig_skb) 1302 ieee80211_free_txskb(mvm->hw, skb); 1303 else 1304 kfree_skb(skb); 1305 /* there was error, but we consumed skb one way or another, so return 0 */ 1306 return 0; 1307 } 1308 } 1309 1310 return 0; 1311 } 1312 1313 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1314 struct ieee80211_sta *sta, u8 tid) 1315 { 1316 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1317 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1318 struct ieee80211_vif *vif = mvmsta->vif; 1319 u16 normalized_ssn; 1320 1321 lockdep_assert_held(&mvmsta->lock); 1322 1323 if ((tid_data->state == IWL_AGG_ON || 1324 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1325 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1326 /* 1327 * Now that this aggregation or DQA queue is empty tell 1328 * mac80211 so it knows we no longer have frames buffered for 1329 * the station on this TID (for the TIM bitmap calculation.) 1330 */ 1331 ieee80211_sta_set_buffered(sta, tid, false); 1332 } 1333 1334 /* 1335 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1336 * to align the wrap around of ssn so we compare relevant values. 1337 */ 1338 normalized_ssn = tid_data->ssn; 1339 if (mvm->trans->trans_cfg->gen2) 1340 normalized_ssn &= 0xff; 1341 1342 if (normalized_ssn != tid_data->next_reclaimed) 1343 return; 1344 1345 switch (tid_data->state) { 1346 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1347 IWL_DEBUG_TX_QUEUES(mvm, 1348 "Can continue addBA flow ssn = next_recl = %d\n", 1349 tid_data->next_reclaimed); 1350 tid_data->state = IWL_AGG_STARTING; 1351 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1352 break; 1353 1354 case IWL_EMPTYING_HW_QUEUE_DELBA: 1355 IWL_DEBUG_TX_QUEUES(mvm, 1356 "Can continue DELBA flow ssn = next_recl = %d\n", 1357 tid_data->next_reclaimed); 1358 tid_data->state = IWL_AGG_OFF; 1359 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1360 break; 1361 1362 default: 1363 break; 1364 } 1365 } 1366 1367 #ifdef CONFIG_IWLWIFI_DEBUG 1368 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1369 { 1370 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1371 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1372 1373 switch (status & TX_STATUS_MSK) { 1374 case TX_STATUS_SUCCESS: 1375 return "SUCCESS"; 1376 TX_STATUS_POSTPONE(DELAY); 1377 TX_STATUS_POSTPONE(FEW_BYTES); 1378 TX_STATUS_POSTPONE(BT_PRIO); 1379 TX_STATUS_POSTPONE(QUIET_PERIOD); 1380 TX_STATUS_POSTPONE(CALC_TTAK); 1381 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1382 TX_STATUS_FAIL(SHORT_LIMIT); 1383 TX_STATUS_FAIL(LONG_LIMIT); 1384 TX_STATUS_FAIL(UNDERRUN); 1385 TX_STATUS_FAIL(DRAIN_FLOW); 1386 TX_STATUS_FAIL(RFKILL_FLUSH); 1387 TX_STATUS_FAIL(LIFE_EXPIRE); 1388 TX_STATUS_FAIL(DEST_PS); 1389 TX_STATUS_FAIL(HOST_ABORTED); 1390 TX_STATUS_FAIL(BT_RETRY); 1391 TX_STATUS_FAIL(STA_INVALID); 1392 TX_STATUS_FAIL(FRAG_DROPPED); 1393 TX_STATUS_FAIL(TID_DISABLE); 1394 TX_STATUS_FAIL(FIFO_FLUSHED); 1395 TX_STATUS_FAIL(SMALL_CF_POLL); 1396 TX_STATUS_FAIL(FW_DROP); 1397 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1398 } 1399 1400 return "UNKNOWN"; 1401 1402 #undef TX_STATUS_FAIL 1403 #undef TX_STATUS_POSTPONE 1404 } 1405 #endif /* CONFIG_IWLWIFI_DEBUG */ 1406 1407 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1408 { 1409 switch (chan_width) { 1410 case RATE_MCS_CHAN_WIDTH_20: 1411 return 0; 1412 case RATE_MCS_CHAN_WIDTH_40: 1413 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1414 case RATE_MCS_CHAN_WIDTH_80: 1415 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1416 case RATE_MCS_CHAN_WIDTH_160: 1417 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1418 default: 1419 return 0; 1420 } 1421 } 1422 1423 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1424 enum nl80211_band band, 1425 struct ieee80211_tx_rate *r) 1426 { 1427 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1428 u32 rate = format == RATE_MCS_HT_MSK ? 1429 RATE_HT_MCS_INDEX(rate_n_flags) : 1430 rate_n_flags & RATE_MCS_CODE_MSK; 1431 1432 r->flags |= 1433 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1434 RATE_MCS_CHAN_WIDTH_MSK); 1435 1436 if (rate_n_flags & RATE_MCS_SGI_MSK) 1437 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1438 if (format == RATE_MCS_HT_MSK) { 1439 r->flags |= IEEE80211_TX_RC_MCS; 1440 r->idx = rate; 1441 } else if (format == RATE_MCS_VHT_MSK) { 1442 ieee80211_rate_set_vht(r, rate, 1443 FIELD_GET(RATE_MCS_NSS_MSK, 1444 rate_n_flags) + 1); 1445 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1446 } else if (format == RATE_MCS_HE_MSK) { 1447 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1448 * but it only matters for radiotap */ 1449 r->idx = 0; 1450 } else { 1451 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1452 band); 1453 } 1454 } 1455 1456 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags, 1457 enum nl80211_band band, 1458 struct ieee80211_tx_rate *r) 1459 { 1460 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1461 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1462 1463 r->flags |= 1464 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1465 RATE_MCS_CHAN_WIDTH_MSK_V1); 1466 1467 if (rate_n_flags & RATE_MCS_SGI_MSK_V1) 1468 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1469 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 1470 r->flags |= IEEE80211_TX_RC_MCS; 1471 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 1472 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 1473 ieee80211_rate_set_vht( 1474 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1475 FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1); 1476 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1477 } else { 1478 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1479 band); 1480 } 1481 } 1482 1483 /* 1484 * translate ucode response to mac80211 tx status control values 1485 */ 1486 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw, 1487 u32 rate_n_flags, 1488 struct ieee80211_tx_info *info) 1489 { 1490 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1491 1492 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP, 1493 TX_CMD, 0) <= 6) 1494 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1495 1496 info->status.antenna = 1497 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1498 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, 1499 info->band, r); 1500 } 1501 1502 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1503 u32 status, __le16 frame_control) 1504 { 1505 struct iwl_fw_dbg_trigger_tlv *trig; 1506 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1507 int i; 1508 1509 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1510 enum iwl_fw_ini_time_point tp = 1511 IWL_FW_INI_TIME_POINT_TX_FAILED; 1512 1513 if (ieee80211_is_action(frame_control)) 1514 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1515 1516 iwl_dbg_tlv_time_point(&mvm->fwrt, 1517 tp, NULL); 1518 return; 1519 } 1520 1521 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1522 FW_DBG_TRIGGER_TX_STATUS); 1523 if (!trig) 1524 return; 1525 1526 status_trig = (void *)trig->data; 1527 1528 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1529 /* don't collect on status 0 */ 1530 if (!status_trig->statuses[i].status) 1531 break; 1532 1533 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1534 continue; 1535 1536 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1537 "Tx status %d was received", 1538 status & TX_STATUS_MSK); 1539 break; 1540 } 1541 } 1542 1543 /* 1544 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1545 * @tx_resp: the Tx response from the fw (agg or non-agg) 1546 * 1547 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1548 * it can't know that everything will go well until the end of the AMPDU, it 1549 * can't know in advance the number of MPDUs that will be sent in the current 1550 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1551 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1552 * of the batch. This is why the SSN of the SCD is written at the end of the 1553 * whole struct at a variable offset. This function knows how to cope with the 1554 * variable offset and returns the SSN of the SCD. 1555 */ 1556 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1557 struct iwl_mvm_tx_resp *tx_resp) 1558 { 1559 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1560 tx_resp->frame_count) & 0xfff; 1561 } 1562 1563 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1564 struct iwl_rx_packet *pkt) 1565 { 1566 struct ieee80211_sta *sta; 1567 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1568 int txq_id = SEQ_TO_QUEUE(sequence); 1569 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1570 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1571 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1572 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1573 struct agg_tx_status *agg_status = 1574 iwl_mvm_get_agg_status(mvm, tx_resp); 1575 u32 status = le16_to_cpu(agg_status->status); 1576 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1577 struct sk_buff_head skbs; 1578 u8 skb_freed = 0; 1579 u8 lq_color; 1580 u16 next_reclaimed, seq_ctl; 1581 bool is_ndp = false; 1582 1583 __skb_queue_head_init(&skbs); 1584 1585 if (iwl_mvm_has_new_tx_api(mvm)) 1586 txq_id = le16_to_cpu(tx_resp->tx_queue); 1587 1588 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1589 1590 /* we can free until ssn % q.n_bd not inclusive */ 1591 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1592 1593 while (!skb_queue_empty(&skbs)) { 1594 struct sk_buff *skb = __skb_dequeue(&skbs); 1595 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1596 struct ieee80211_hdr *hdr = (void *)skb->data; 1597 bool flushed = false; 1598 1599 skb_freed++; 1600 1601 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1602 1603 memset(&info->status, 0, sizeof(info->status)); 1604 1605 /* inform mac80211 about what happened with the frame */ 1606 switch (status & TX_STATUS_MSK) { 1607 case TX_STATUS_SUCCESS: 1608 case TX_STATUS_DIRECT_DONE: 1609 info->flags |= IEEE80211_TX_STAT_ACK; 1610 break; 1611 case TX_STATUS_FAIL_FIFO_FLUSHED: 1612 case TX_STATUS_FAIL_DRAIN_FLOW: 1613 flushed = true; 1614 break; 1615 case TX_STATUS_FAIL_DEST_PS: 1616 /* the FW should have stopped the queue and not 1617 * return this status 1618 */ 1619 IWL_ERR_LIMIT(mvm, 1620 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1621 status, le16_to_cpu(hdr->frame_control)); 1622 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1623 break; 1624 default: 1625 break; 1626 } 1627 1628 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1629 ieee80211_is_mgmt(hdr->frame_control)) 1630 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1631 1632 /* 1633 * If we are freeing multiple frames, mark all the frames 1634 * but the first one as acked, since they were acknowledged 1635 * before 1636 * */ 1637 if (skb_freed > 1) 1638 info->flags |= IEEE80211_TX_STAT_ACK; 1639 1640 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1641 1642 info->status.rates[0].count = tx_resp->failure_frame + 1; 1643 1644 iwl_mvm_hwrate_to_tx_status(mvm->fw, 1645 le32_to_cpu(tx_resp->initial_rate), 1646 info); 1647 1648 /* Don't assign the converted initial_rate, because driver 1649 * TLC uses this and doesn't support the new FW rate 1650 */ 1651 info->status.status_driver_data[1] = 1652 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1653 1654 /* Single frame failure in an AMPDU queue => send BAR */ 1655 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1656 !(info->flags & IEEE80211_TX_STAT_ACK) && 1657 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1658 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1659 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1660 1661 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1662 if (ieee80211_is_back_req(hdr->frame_control)) 1663 seq_ctl = 0; 1664 else if (status != TX_STATUS_SUCCESS) 1665 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1666 1667 if (unlikely(!seq_ctl)) { 1668 /* 1669 * If it is an NDP, we can't update next_reclaim since 1670 * its sequence control is 0. Note that for that same 1671 * reason, NDPs are never sent to A-MPDU'able queues 1672 * so that we can never have more than one freed frame 1673 * for a single Tx resonse (see WARN_ON below). 1674 */ 1675 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1676 is_ndp = true; 1677 } 1678 1679 /* 1680 * TODO: this is not accurate if we are freeing more than one 1681 * packet. 1682 */ 1683 info->status.tx_time = 1684 le16_to_cpu(tx_resp->wireless_media_time); 1685 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1686 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1687 info->status.status_driver_data[0] = 1688 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1689 1690 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1))) 1691 ieee80211_tx_status(mvm->hw, skb); 1692 } 1693 1694 /* This is an aggregation queue or might become one, so we use 1695 * the ssn since: ssn = wifi seq_num % 256. 1696 * The seq_ctl is the sequence control of the packet to which 1697 * this Tx response relates. But if there is a hole in the 1698 * bitmap of the BA we received, this Tx response may allow to 1699 * reclaim the hole and all the subsequent packets that were 1700 * already acked. In that case, seq_ctl != ssn, and the next 1701 * packet to be reclaimed will be ssn and not seq_ctl. In that 1702 * case, several packets will be reclaimed even if 1703 * frame_count = 1. 1704 * 1705 * The ssn is the index (% 256) of the latest packet that has 1706 * treated (acked / dropped) + 1. 1707 */ 1708 next_reclaimed = ssn; 1709 1710 IWL_DEBUG_TX_REPLY(mvm, 1711 "TXQ %d status %s (0x%08x)\n", 1712 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1713 1714 IWL_DEBUG_TX_REPLY(mvm, 1715 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1716 le32_to_cpu(tx_resp->initial_rate), 1717 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1718 ssn, next_reclaimed, seq_ctl); 1719 1720 rcu_read_lock(); 1721 1722 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1723 /* 1724 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1725 * the firmware while we still have packets for it in the Tx queues. 1726 */ 1727 if (WARN_ON_ONCE(!sta)) 1728 goto out; 1729 1730 if (!IS_ERR(sta)) { 1731 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1732 1733 iwl_mvm_tx_airtime(mvm, mvmsta, 1734 le16_to_cpu(tx_resp->wireless_media_time)); 1735 1736 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1737 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1738 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1739 1740 if (sta->wme && tid != IWL_MGMT_TID) { 1741 struct iwl_mvm_tid_data *tid_data = 1742 &mvmsta->tid_data[tid]; 1743 bool send_eosp_ndp = false; 1744 1745 spin_lock_bh(&mvmsta->lock); 1746 1747 if (!is_ndp) { 1748 tid_data->next_reclaimed = next_reclaimed; 1749 IWL_DEBUG_TX_REPLY(mvm, 1750 "Next reclaimed packet:%d\n", 1751 next_reclaimed); 1752 } else { 1753 IWL_DEBUG_TX_REPLY(mvm, 1754 "NDP - don't update next_reclaimed\n"); 1755 } 1756 1757 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1758 1759 if (mvmsta->sleep_tx_count) { 1760 mvmsta->sleep_tx_count--; 1761 if (mvmsta->sleep_tx_count && 1762 !iwl_mvm_tid_queued(mvm, tid_data)) { 1763 /* 1764 * The number of frames in the queue 1765 * dropped to 0 even if we sent less 1766 * frames than we thought we had on the 1767 * Tx queue. 1768 * This means we had holes in the BA 1769 * window that we just filled, ask 1770 * mac80211 to send EOSP since the 1771 * firmware won't know how to do that. 1772 * Send NDP and the firmware will send 1773 * EOSP notification that will trigger 1774 * a call to ieee80211_sta_eosp(). 1775 */ 1776 send_eosp_ndp = true; 1777 } 1778 } 1779 1780 spin_unlock_bh(&mvmsta->lock); 1781 if (send_eosp_ndp) { 1782 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1783 IEEE80211_FRAME_RELEASE_UAPSD, 1784 1, tid, false, false); 1785 mvmsta->sleep_tx_count = 0; 1786 ieee80211_send_eosp_nullfunc(sta, tid); 1787 } 1788 } 1789 1790 if (mvmsta->next_status_eosp) { 1791 mvmsta->next_status_eosp = false; 1792 ieee80211_sta_eosp(sta); 1793 } 1794 } 1795 out: 1796 rcu_read_unlock(); 1797 } 1798 1799 #ifdef CONFIG_IWLWIFI_DEBUG 1800 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1801 static const char *iwl_get_agg_tx_status(u16 status) 1802 { 1803 switch (status & AGG_TX_STATE_STATUS_MSK) { 1804 AGG_TX_STATE_(TRANSMITTED); 1805 AGG_TX_STATE_(UNDERRUN); 1806 AGG_TX_STATE_(BT_PRIO); 1807 AGG_TX_STATE_(FEW_BYTES); 1808 AGG_TX_STATE_(ABORT); 1809 AGG_TX_STATE_(TX_ON_AIR_DROP); 1810 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1811 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1812 AGG_TX_STATE_(SCD_QUERY); 1813 AGG_TX_STATE_(TEST_BAD_CRC32); 1814 AGG_TX_STATE_(RESPONSE); 1815 AGG_TX_STATE_(DUMP_TX); 1816 AGG_TX_STATE_(DELAY_TX); 1817 } 1818 1819 return "UNKNOWN"; 1820 } 1821 1822 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1823 struct iwl_rx_packet *pkt) 1824 { 1825 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1826 struct agg_tx_status *frame_status = 1827 iwl_mvm_get_agg_status(mvm, tx_resp); 1828 int i; 1829 bool tirgger_timepoint = false; 1830 1831 for (i = 0; i < tx_resp->frame_count; i++) { 1832 u16 fstatus = le16_to_cpu(frame_status[i].status); 1833 /* In case one frame wasn't transmitted trigger time point */ 1834 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1835 AGG_TX_STATE_TRANSMITTED); 1836 IWL_DEBUG_TX_REPLY(mvm, 1837 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1838 iwl_get_agg_tx_status(fstatus), 1839 fstatus & AGG_TX_STATE_STATUS_MSK, 1840 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1841 AGG_TX_STATE_TRY_CNT_POS, 1842 le16_to_cpu(frame_status[i].sequence)); 1843 } 1844 1845 if (tirgger_timepoint) 1846 iwl_dbg_tlv_time_point(&mvm->fwrt, 1847 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1848 1849 } 1850 #else 1851 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1852 struct iwl_rx_packet *pkt) 1853 {} 1854 #endif /* CONFIG_IWLWIFI_DEBUG */ 1855 1856 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1857 struct iwl_rx_packet *pkt) 1858 { 1859 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1860 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1861 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1862 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1863 struct iwl_mvm_sta *mvmsta; 1864 int queue = SEQ_TO_QUEUE(sequence); 1865 struct ieee80211_sta *sta; 1866 1867 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1868 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1869 return; 1870 1871 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1872 1873 rcu_read_lock(); 1874 1875 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1876 1877 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1878 if (WARN_ON_ONCE(!sta || !sta->wme)) { 1879 rcu_read_unlock(); 1880 return; 1881 } 1882 1883 if (!WARN_ON_ONCE(!mvmsta)) { 1884 mvmsta->tid_data[tid].rate_n_flags = 1885 le32_to_cpu(tx_resp->initial_rate); 1886 mvmsta->tid_data[tid].tx_time = 1887 le16_to_cpu(tx_resp->wireless_media_time); 1888 mvmsta->tid_data[tid].lq_color = 1889 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1890 iwl_mvm_tx_airtime(mvm, mvmsta, 1891 le16_to_cpu(tx_resp->wireless_media_time)); 1892 } 1893 1894 rcu_read_unlock(); 1895 } 1896 1897 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1898 { 1899 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1900 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1901 1902 if (tx_resp->frame_count == 1) 1903 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1904 else 1905 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1906 } 1907 1908 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1909 int txq, int index, 1910 struct ieee80211_tx_info *tx_info, u32 rate, 1911 bool is_flush) 1912 { 1913 struct sk_buff_head reclaimed_skbs; 1914 struct iwl_mvm_tid_data *tid_data = NULL; 1915 struct ieee80211_sta *sta; 1916 struct iwl_mvm_sta *mvmsta = NULL; 1917 struct sk_buff *skb; 1918 int freed; 1919 1920 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1921 tid > IWL_MAX_TID_COUNT, 1922 "sta_id %d tid %d", sta_id, tid)) 1923 return; 1924 1925 rcu_read_lock(); 1926 1927 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1928 1929 /* Reclaiming frames for a station that has been deleted ? */ 1930 if (WARN_ON_ONCE(!sta)) { 1931 rcu_read_unlock(); 1932 return; 1933 } 1934 1935 __skb_queue_head_init(&reclaimed_skbs); 1936 1937 /* 1938 * Release all TFDs before the SSN, i.e. all TFDs in front of 1939 * block-ack window (we assume that they've been successfully 1940 * transmitted ... if not, it's too late anyway). 1941 */ 1942 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1943 1944 skb_queue_walk(&reclaimed_skbs, skb) { 1945 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1946 1947 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1948 1949 memset(&info->status, 0, sizeof(info->status)); 1950 /* Packet was transmitted successfully, failures come as single 1951 * frames because before failing a frame the firmware transmits 1952 * it without aggregation at least once. 1953 */ 1954 if (!is_flush) 1955 info->flags |= IEEE80211_TX_STAT_ACK; 1956 } 1957 1958 /* 1959 * It's possible to get a BA response after invalidating the rcu (rcu is 1960 * invalidated in order to prevent new Tx from being sent, but there may 1961 * be some frames already in-flight). 1962 * In this case we just want to reclaim, and could skip all the 1963 * sta-dependent stuff since it's in the middle of being removed 1964 * anyways. 1965 */ 1966 if (IS_ERR(sta)) 1967 goto out; 1968 1969 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1970 tid_data = &mvmsta->tid_data[tid]; 1971 1972 if (tid_data->txq_id != txq) { 1973 IWL_ERR(mvm, 1974 "invalid reclaim request: Q %d, tid %d\n", 1975 tid_data->txq_id, tid); 1976 rcu_read_unlock(); 1977 return; 1978 } 1979 1980 spin_lock_bh(&mvmsta->lock); 1981 1982 tid_data->next_reclaimed = index; 1983 1984 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1985 1986 freed = 0; 1987 1988 /* pack lq color from tid_data along the reduced txp */ 1989 tx_info->status.status_driver_data[0] = 1990 RS_DRV_DATA_PACK(tid_data->lq_color, 1991 tx_info->status.status_driver_data[0]); 1992 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1993 1994 skb_queue_walk(&reclaimed_skbs, skb) { 1995 struct ieee80211_hdr *hdr = (void *)skb->data; 1996 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1997 1998 if (!is_flush) { 1999 if (ieee80211_is_data_qos(hdr->frame_control)) 2000 freed++; 2001 else 2002 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 2003 } 2004 2005 /* this is the first skb we deliver in this batch */ 2006 /* put the rate scaling data there */ 2007 if (freed == 1) { 2008 info->flags |= IEEE80211_TX_STAT_AMPDU; 2009 memcpy(&info->status, &tx_info->status, 2010 sizeof(tx_info->status)); 2011 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info); 2012 } 2013 } 2014 2015 spin_unlock_bh(&mvmsta->lock); 2016 2017 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 2018 * possible (i.e. first MPDU in the aggregation wasn't acked) 2019 * Still it's important to update RS about sent vs. acked. 2020 */ 2021 if (!is_flush && skb_queue_empty(&reclaimed_skbs) && 2022 !iwl_mvm_has_tlc_offload(mvm)) { 2023 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 2024 2025 /* no TLC offload, so non-MLD mode */ 2026 if (mvmsta->vif) 2027 chanctx_conf = 2028 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf); 2029 2030 if (WARN_ON_ONCE(!chanctx_conf)) 2031 goto out; 2032 2033 tx_info->band = chanctx_conf->def.chan->band; 2034 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info); 2035 2036 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 2037 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 2038 } 2039 2040 out: 2041 rcu_read_unlock(); 2042 2043 while (!skb_queue_empty(&reclaimed_skbs)) { 2044 skb = __skb_dequeue(&reclaimed_skbs); 2045 ieee80211_tx_status(mvm->hw, skb); 2046 } 2047 } 2048 2049 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2050 { 2051 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2052 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 2053 int sta_id, tid, txq, index; 2054 struct ieee80211_tx_info ba_info = {}; 2055 struct iwl_mvm_ba_notif *ba_notif; 2056 struct iwl_mvm_tid_data *tid_data; 2057 struct iwl_mvm_sta *mvmsta; 2058 2059 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 2060 2061 if (iwl_mvm_has_new_tx_api(mvm)) { 2062 struct iwl_mvm_compressed_ba_notif *ba_res = 2063 (void *)pkt->data; 2064 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 2065 u16 tfd_cnt; 2066 int i; 2067 2068 if (unlikely(sizeof(*ba_res) > pkt_len)) 2069 return; 2070 2071 sta_id = ba_res->sta_id; 2072 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 2073 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 2074 ba_info.status.tx_time = 2075 (u16)le32_to_cpu(ba_res->wireless_time); 2076 ba_info.status.status_driver_data[0] = 2077 (void *)(uintptr_t)ba_res->reduced_txp; 2078 2079 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 2080 if (!tfd_cnt || struct_size(ba_res, tfd, tfd_cnt) > pkt_len) 2081 return; 2082 2083 rcu_read_lock(); 2084 2085 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2086 /* 2087 * It's possible to get a BA response after invalidating the rcu 2088 * (rcu is invalidated in order to prevent new Tx from being 2089 * sent, but there may be some frames already in-flight). 2090 * In this case we just want to reclaim, and could skip all the 2091 * sta-dependent stuff since it's in the middle of being removed 2092 * anyways. 2093 */ 2094 2095 /* Free per TID */ 2096 for (i = 0; i < tfd_cnt; i++) { 2097 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 2098 &ba_res->tfd[i]; 2099 2100 tid = ba_tfd->tid; 2101 if (tid == IWL_MGMT_TID) 2102 tid = IWL_MAX_TID_COUNT; 2103 2104 if (mvmsta) 2105 mvmsta->tid_data[i].lq_color = lq_color; 2106 2107 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 2108 (int)(le16_to_cpu(ba_tfd->q_num)), 2109 le16_to_cpu(ba_tfd->tfd_index), 2110 &ba_info, 2111 le32_to_cpu(ba_res->tx_rate), false); 2112 } 2113 2114 if (mvmsta) 2115 iwl_mvm_tx_airtime(mvm, mvmsta, 2116 le32_to_cpu(ba_res->wireless_time)); 2117 rcu_read_unlock(); 2118 2119 IWL_DEBUG_TX_REPLY(mvm, 2120 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2121 sta_id, le32_to_cpu(ba_res->flags), 2122 le16_to_cpu(ba_res->txed), 2123 le16_to_cpu(ba_res->done)); 2124 return; 2125 } 2126 2127 ba_notif = (void *)pkt->data; 2128 sta_id = ba_notif->sta_id; 2129 tid = ba_notif->tid; 2130 /* "flow" corresponds to Tx queue */ 2131 txq = le16_to_cpu(ba_notif->scd_flow); 2132 /* "ssn" is start of block-ack Tx window, corresponds to index 2133 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2134 index = le16_to_cpu(ba_notif->scd_ssn); 2135 2136 rcu_read_lock(); 2137 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2138 if (WARN_ON_ONCE(!mvmsta)) { 2139 rcu_read_unlock(); 2140 return; 2141 } 2142 2143 tid_data = &mvmsta->tid_data[tid]; 2144 2145 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2146 ba_info.status.ampdu_len = ba_notif->txed; 2147 ba_info.status.tx_time = tid_data->tx_time; 2148 ba_info.status.status_driver_data[0] = 2149 (void *)(uintptr_t)ba_notif->reduced_txp; 2150 2151 rcu_read_unlock(); 2152 2153 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2154 tid_data->rate_n_flags, false); 2155 2156 IWL_DEBUG_TX_REPLY(mvm, 2157 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2158 ba_notif->sta_addr, ba_notif->sta_id); 2159 2160 IWL_DEBUG_TX_REPLY(mvm, 2161 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2162 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2163 le64_to_cpu(ba_notif->bitmap), txq, index, 2164 ba_notif->txed, ba_notif->txed_2_done); 2165 2166 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2167 ba_notif->reduced_txp); 2168 } 2169 2170 /* 2171 * Note that there are transports that buffer frames before they reach 2172 * the firmware. This means that after flush_tx_path is called, the 2173 * queue might not be empty. The race-free way to handle this is to: 2174 * 1) set the station as draining 2175 * 2) flush the Tx path 2176 * 3) wait for the transport queues to be empty 2177 */ 2178 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2179 { 2180 int ret; 2181 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2182 .queues_ctl = cpu_to_le32(tfd_msk), 2183 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2184 }; 2185 2186 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2187 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2188 sizeof(flush_cmd), &flush_cmd); 2189 if (ret) 2190 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2191 return ret; 2192 } 2193 2194 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2195 { 2196 int ret; 2197 struct iwl_tx_path_flush_cmd_rsp *rsp; 2198 struct iwl_tx_path_flush_cmd flush_cmd = { 2199 .sta_id = cpu_to_le32(sta_id), 2200 .tid_mask = cpu_to_le16(tids), 2201 }; 2202 2203 struct iwl_host_cmd cmd = { 2204 .id = TXPATH_FLUSH, 2205 .len = { sizeof(flush_cmd), }, 2206 .data = { &flush_cmd, }, 2207 }; 2208 2209 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2210 2211 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2212 cmd.flags |= CMD_WANT_SKB; 2213 2214 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2215 sta_id, tids); 2216 2217 ret = iwl_mvm_send_cmd(mvm, &cmd); 2218 2219 if (ret) { 2220 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2221 return ret; 2222 } 2223 2224 if (cmd.flags & CMD_WANT_SKB) { 2225 int i; 2226 int num_flushed_queues; 2227 2228 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2229 ret = -EIO; 2230 goto free_rsp; 2231 } 2232 2233 rsp = (void *)cmd.resp_pkt->data; 2234 2235 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2236 "sta_id %d != rsp_sta_id %d", 2237 sta_id, le16_to_cpu(rsp->sta_id))) { 2238 ret = -EIO; 2239 goto free_rsp; 2240 } 2241 2242 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2243 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2244 "num_flushed_queues %d", num_flushed_queues)) { 2245 ret = -EIO; 2246 goto free_rsp; 2247 } 2248 2249 for (i = 0; i < num_flushed_queues; i++) { 2250 struct ieee80211_tx_info tx_info = {}; 2251 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2252 int tid = le16_to_cpu(queue_info->tid); 2253 int read_before = le16_to_cpu(queue_info->read_before_flush); 2254 int read_after = le16_to_cpu(queue_info->read_after_flush); 2255 int queue_num = le16_to_cpu(queue_info->queue_num); 2256 2257 if (tid == IWL_MGMT_TID) 2258 tid = IWL_MAX_TID_COUNT; 2259 2260 IWL_DEBUG_TX_QUEUES(mvm, 2261 "tid %d queue_id %d read-before %d read-after %d\n", 2262 tid, queue_num, read_before, read_after); 2263 2264 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2265 &tx_info, 0, true); 2266 } 2267 free_rsp: 2268 iwl_free_resp(&cmd); 2269 } 2270 return ret; 2271 } 2272 2273 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal) 2274 { 2275 u32 sta_id, tfd_queue_msk; 2276 2277 if (internal) { 2278 struct iwl_mvm_int_sta *int_sta = sta; 2279 2280 sta_id = int_sta->sta_id; 2281 tfd_queue_msk = int_sta->tfd_queue_msk; 2282 } else { 2283 struct iwl_mvm_sta *mvm_sta = sta; 2284 2285 sta_id = mvm_sta->deflink.sta_id; 2286 tfd_queue_msk = mvm_sta->tfd_queue_msk; 2287 } 2288 2289 if (iwl_mvm_has_new_tx_api(mvm)) 2290 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff); 2291 2292 return iwl_mvm_flush_tx_path(mvm, tfd_queue_msk); 2293 } 2294