1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2023 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-eeprom-parse.h" 16 #include "mvm.h" 17 #include "sta.h" 18 #include "time-sync.h" 19 20 static void 21 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 22 u16 tid, u16 ssn) 23 { 24 struct iwl_fw_dbg_trigger_tlv *trig; 25 struct iwl_fw_dbg_trigger_ba *ba_trig; 26 27 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA); 28 if (!trig) 29 return; 30 31 ba_trig = (void *)trig->data; 32 33 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 34 return; 35 36 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 37 "BAR sent to %pM, tid %d, ssn %d", 38 addr, tid, ssn); 39 } 40 41 #define OPT_HDR(type, skb, off) \ 42 (type *)(skb_network_header(skb) + (off)) 43 44 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 45 struct ieee80211_tx_info *info, 46 bool amsdu) 47 { 48 struct ieee80211_hdr *hdr = (void *)skb->data; 49 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 50 u16 offload_assist = 0; 51 #if IS_ENABLED(CONFIG_INET) 52 u8 protocol = 0; 53 54 /* Do not compute checksum if already computed */ 55 if (skb->ip_summed != CHECKSUM_PARTIAL) 56 goto out; 57 58 /* We do not expect to be requested to csum stuff we do not support */ 59 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 60 (skb->protocol != htons(ETH_P_IP) && 61 skb->protocol != htons(ETH_P_IPV6)), 62 "No support for requested checksum\n")) { 63 skb_checksum_help(skb); 64 goto out; 65 } 66 67 if (skb->protocol == htons(ETH_P_IP)) { 68 protocol = ip_hdr(skb)->protocol; 69 } else { 70 #if IS_ENABLED(CONFIG_IPV6) 71 struct ipv6hdr *ipv6h = 72 (struct ipv6hdr *)skb_network_header(skb); 73 unsigned int off = sizeof(*ipv6h); 74 75 protocol = ipv6h->nexthdr; 76 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 77 struct ipv6_opt_hdr *hp; 78 79 /* only supported extension headers */ 80 if (protocol != NEXTHDR_ROUTING && 81 protocol != NEXTHDR_HOP && 82 protocol != NEXTHDR_DEST) { 83 skb_checksum_help(skb); 84 goto out; 85 } 86 87 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 88 protocol = hp->nexthdr; 89 off += ipv6_optlen(hp); 90 } 91 /* if we get here - protocol now should be TCP/UDP */ 92 #endif 93 } 94 95 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 96 WARN_ON_ONCE(1); 97 skb_checksum_help(skb); 98 goto out; 99 } 100 101 /* enable L4 csum */ 102 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 103 104 /* 105 * Set offset to IP header (snap). 106 * We don't support tunneling so no need to take care of inner header. 107 * Size is in words. 108 */ 109 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 110 111 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 112 if (skb->protocol == htons(ETH_P_IP) && amsdu) { 113 ip_hdr(skb)->check = 0; 114 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 115 } 116 117 /* reset UDP/TCP header csum */ 118 if (protocol == IPPROTO_TCP) 119 tcp_hdr(skb)->check = 0; 120 else 121 udp_hdr(skb)->check = 0; 122 123 out: 124 #endif 125 /* 126 * mac header len should include IV, size is in words unless 127 * the IV is added by the firmware like in WEP. 128 * In new Tx API, the IV is always added by the firmware. 129 */ 130 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 131 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 132 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 133 mh_len += info->control.hw_key->iv_len; 134 mh_len /= 2; 135 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 136 137 if (amsdu) 138 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 139 else if (ieee80211_hdrlen(hdr->frame_control) % 4) 140 /* padding is inserted later in transport */ 141 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 142 143 return offload_assist; 144 } 145 146 /* 147 * Sets most of the Tx cmd's fields 148 */ 149 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 150 struct iwl_tx_cmd *tx_cmd, 151 struct ieee80211_tx_info *info, u8 sta_id) 152 { 153 struct ieee80211_hdr *hdr = (void *)skb->data; 154 __le16 fc = hdr->frame_control; 155 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 156 u32 len = skb->len + FCS_LEN; 157 bool amsdu = false; 158 u8 ac; 159 160 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) || 161 (ieee80211_is_probe_resp(fc) && 162 !is_multicast_ether_addr(hdr->addr1))) 163 tx_flags |= TX_CMD_FLG_ACK; 164 else 165 tx_flags &= ~TX_CMD_FLG_ACK; 166 167 if (ieee80211_is_probe_resp(fc)) 168 tx_flags |= TX_CMD_FLG_TSF; 169 170 if (ieee80211_has_morefrags(fc)) 171 tx_flags |= TX_CMD_FLG_MORE_FRAG; 172 173 if (ieee80211_is_data_qos(fc)) { 174 u8 *qc = ieee80211_get_qos_ctl(hdr); 175 tx_cmd->tid_tspec = qc[0] & 0xf; 176 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 177 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 178 } else if (ieee80211_is_back_req(fc)) { 179 struct ieee80211_bar *bar = (void *)skb->data; 180 u16 control = le16_to_cpu(bar->control); 181 u16 ssn = le16_to_cpu(bar->start_seq_num); 182 183 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 184 tx_cmd->tid_tspec = (control & 185 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 186 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 187 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 188 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 189 ssn); 190 } else { 191 if (ieee80211_is_data(fc)) 192 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 193 else 194 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT; 195 196 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 197 tx_flags |= TX_CMD_FLG_SEQ_CTL; 198 else 199 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 200 } 201 202 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */ 203 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 204 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 205 else 206 ac = tid_to_mac80211_ac[0]; 207 208 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 209 TX_CMD_FLG_BT_PRIO_POS; 210 211 if (ieee80211_is_mgmt(fc)) { 212 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 213 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 214 else if (ieee80211_is_action(fc)) 215 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 216 else 217 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 218 219 /* The spec allows Action frames in A-MPDU, we don't support 220 * it 221 */ 222 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 223 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 224 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 225 } else { 226 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 227 } 228 229 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 230 !is_multicast_ether_addr(hdr->addr1)) 231 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 232 233 if (fw_has_capa(&mvm->fw->ucode_capa, 234 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 235 ieee80211_action_contains_tpc(skb)) 236 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 237 238 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 239 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 240 tx_cmd->len = cpu_to_le16((u16)skb->len); 241 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 242 tx_cmd->sta_id = sta_id; 243 244 tx_cmd->offload_assist = 245 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu)); 246 } 247 248 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, 249 struct ieee80211_tx_info *info, 250 struct ieee80211_sta *sta, __le16 fc) 251 { 252 if (info->band == NL80211_BAND_2GHZ && 253 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 254 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 255 256 if (sta && ieee80211_is_data(fc)) { 257 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 258 259 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS; 260 } 261 262 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 263 } 264 265 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm, 266 struct ieee80211_tx_info *info) 267 { 268 struct ieee80211_tx_rate *rate = &info->control.rates[0]; 269 u32 result; 270 271 /* 272 * we only care about legacy/HT/VHT so far, so we can 273 * build in v1 and use iwl_new_rate_from_v1() 274 */ 275 276 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { 277 u8 mcs = ieee80211_rate_get_vht_mcs(rate); 278 u8 nss = ieee80211_rate_get_vht_nss(rate); 279 280 result = RATE_MCS_VHT_MSK_V1; 281 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK); 282 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK); 283 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 284 result |= RATE_MCS_SGI_MSK_V1; 285 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 286 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 287 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 288 result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1); 289 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 290 result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1); 291 } else if (rate->flags & IEEE80211_TX_RC_MCS) { 292 result = RATE_MCS_HT_MSK_V1; 293 result |= u32_encode_bits(rate->idx, 294 RATE_HT_MCS_RATE_CODE_MSK_V1 | 295 RATE_HT_MCS_NSS_MSK_V1); 296 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 297 result |= RATE_MCS_SGI_MSK_V1; 298 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 299 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 300 if (info->flags & IEEE80211_TX_CTL_LDPC) 301 result |= RATE_MCS_LDPC_MSK_V1; 302 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC)) 303 result |= RATE_MCS_STBC_MSK; 304 } else { 305 return 0; 306 } 307 308 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6) 309 return iwl_new_rate_from_v1(result); 310 return result; 311 } 312 313 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 314 struct ieee80211_tx_info *info, 315 struct ieee80211_sta *sta, __le16 fc) 316 { 317 int rate_idx = -1; 318 u8 rate_plcp; 319 u32 rate_flags = 0; 320 bool is_cck; 321 322 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) { 323 u32 result = iwl_mvm_get_inject_tx_rate(mvm, info); 324 325 if (result) 326 return result; 327 rate_idx = info->control.rates[0].idx; 328 } else if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { 329 /* info->control is only relevant for non HW rate control */ 330 331 /* HT rate doesn't make sense for a non data frame */ 332 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && 333 !ieee80211_is_data(fc), 334 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", 335 info->control.rates[0].flags, 336 info->control.rates[0].idx, 337 le16_to_cpu(fc), 338 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 339 340 rate_idx = info->control.rates[0].idx; 341 342 /* For non 2 GHZ band, remap mac80211 rate indices into driver 343 * indices. 344 */ 345 if (info->band != NL80211_BAND_2GHZ || 346 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE)) 347 rate_idx += IWL_FIRST_OFDM_RATE; 348 349 /* For 2.4 GHZ band, check that there is no need to remap */ 350 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 351 } 352 353 /* if the rate isn't a well known legacy rate, take the lowest one */ 354 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 355 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm, 356 info, 357 info->control.vif); 358 359 /* Get PLCP rate for tx_cmd->rate_n_flags */ 360 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx); 361 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE); 362 363 /* Set CCK or OFDM flag */ 364 if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) { 365 if (!is_cck) 366 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK; 367 else 368 rate_flags |= RATE_MCS_CCK_MSK; 369 } else if (is_cck) { 370 rate_flags |= RATE_MCS_CCK_MSK_V1; 371 } 372 373 return (u32)rate_plcp | rate_flags; 374 } 375 376 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 377 struct ieee80211_tx_info *info, 378 struct ieee80211_sta *sta, __le16 fc) 379 { 380 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) | 381 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 382 } 383 384 /* 385 * Sets the fields in the Tx cmd that are rate related 386 */ 387 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 388 struct ieee80211_tx_info *info, 389 struct ieee80211_sta *sta, __le16 fc) 390 { 391 /* Set retry limit on RTS packets */ 392 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 393 394 /* Set retry limit on DATA packets and Probe Responses*/ 395 if (ieee80211_is_probe_resp(fc)) { 396 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 397 tx_cmd->rts_retry_limit = 398 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 399 } else if (ieee80211_is_back_req(fc)) { 400 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 401 } else { 402 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 403 } 404 405 /* 406 * for data packets, rate info comes from the table inside the fw. This 407 * table is controlled by LINK_QUALITY commands 408 */ 409 410 if (likely(ieee80211_is_data(fc) && sta && 411 !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) { 412 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 413 414 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 415 tx_cmd->initial_rate_index = 0; 416 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 417 return; 418 } 419 } else if (ieee80211_is_back_req(fc)) { 420 tx_cmd->tx_flags |= 421 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 422 } 423 424 /* Set the rate in the TX cmd */ 425 tx_cmd->rate_n_flags = 426 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 427 } 428 429 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 430 u8 *crypto_hdr) 431 { 432 struct ieee80211_key_conf *keyconf = info->control.hw_key; 433 u64 pn; 434 435 pn = atomic64_inc_return(&keyconf->tx_pn); 436 crypto_hdr[0] = pn; 437 crypto_hdr[2] = 0; 438 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 439 crypto_hdr[1] = pn >> 8; 440 crypto_hdr[4] = pn >> 16; 441 crypto_hdr[5] = pn >> 24; 442 crypto_hdr[6] = pn >> 32; 443 crypto_hdr[7] = pn >> 40; 444 } 445 446 /* 447 * Sets the fields in the Tx cmd that are crypto related 448 */ 449 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 450 struct ieee80211_tx_info *info, 451 struct iwl_tx_cmd *tx_cmd, 452 struct sk_buff *skb_frag, 453 int hdrlen) 454 { 455 struct ieee80211_key_conf *keyconf = info->control.hw_key; 456 u8 *crypto_hdr = skb_frag->data + hdrlen; 457 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 458 u64 pn; 459 460 switch (keyconf->cipher) { 461 case WLAN_CIPHER_SUITE_CCMP: 462 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 463 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 464 break; 465 466 case WLAN_CIPHER_SUITE_TKIP: 467 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 468 pn = atomic64_inc_return(&keyconf->tx_pn); 469 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 470 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 471 break; 472 473 case WLAN_CIPHER_SUITE_WEP104: 474 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 475 fallthrough; 476 case WLAN_CIPHER_SUITE_WEP40: 477 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 478 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 479 TX_CMD_SEC_WEP_KEY_IDX_MSK); 480 481 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 482 break; 483 case WLAN_CIPHER_SUITE_GCMP: 484 case WLAN_CIPHER_SUITE_GCMP_256: 485 type = TX_CMD_SEC_GCMP; 486 fallthrough; 487 case WLAN_CIPHER_SUITE_CCMP_256: 488 /* TODO: Taking the key from the table might introduce a race 489 * when PTK rekeying is done, having an old packets with a PN 490 * based on the old key but the message encrypted with a new 491 * one. 492 * Need to handle this. 493 */ 494 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 495 tx_cmd->key[0] = keyconf->hw_key_idx; 496 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 497 break; 498 default: 499 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 500 } 501 } 502 503 /* 504 * Allocates and sets the Tx cmd the driver data pointers in the skb 505 */ 506 static struct iwl_device_tx_cmd * 507 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 508 struct ieee80211_tx_info *info, int hdrlen, 509 struct ieee80211_sta *sta, u8 sta_id) 510 { 511 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 512 struct iwl_device_tx_cmd *dev_cmd; 513 struct iwl_tx_cmd *tx_cmd; 514 515 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 516 517 if (unlikely(!dev_cmd)) 518 return NULL; 519 520 dev_cmd->hdr.cmd = TX_CMD; 521 522 if (iwl_mvm_has_new_tx_api(mvm)) { 523 u32 rate_n_flags = 0; 524 u16 flags = 0; 525 struct iwl_mvm_sta *mvmsta = sta ? 526 iwl_mvm_sta_from_mac80211(sta) : NULL; 527 bool amsdu = false; 528 529 if (ieee80211_is_data_qos(hdr->frame_control)) { 530 u8 *qc = ieee80211_get_qos_ctl(hdr); 531 532 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 533 } 534 535 if (!info->control.hw_key) 536 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 537 538 /* 539 * For data packets rate info comes from the fw. Only 540 * set rate/antenna during connection establishment or in case 541 * no station is given. 542 */ 543 if (!sta || !ieee80211_is_data(hdr->frame_control) || 544 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 545 flags |= IWL_TX_FLAGS_CMD_RATE; 546 rate_n_flags = 547 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 548 hdr->frame_control); 549 } 550 551 if (mvm->trans->trans_cfg->device_family >= 552 IWL_DEVICE_FAMILY_AX210) { 553 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 554 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, 555 info, amsdu); 556 557 cmd->offload_assist = cpu_to_le32(offload_assist); 558 559 /* Total # bytes to be transmitted */ 560 cmd->len = cpu_to_le16((u16)skb->len); 561 562 /* Copy MAC header from skb into command buffer */ 563 memcpy(cmd->hdr, hdr, hdrlen); 564 565 cmd->flags = cpu_to_le16(flags); 566 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 567 } else { 568 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 569 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb, 570 info, amsdu); 571 572 cmd->offload_assist = cpu_to_le16(offload_assist); 573 574 /* Total # bytes to be transmitted */ 575 cmd->len = cpu_to_le16((u16)skb->len); 576 577 /* Copy MAC header from skb into command buffer */ 578 memcpy(cmd->hdr, hdr, hdrlen); 579 580 cmd->flags = cpu_to_le32(flags); 581 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 582 } 583 goto out; 584 } 585 586 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 587 588 if (info->control.hw_key) 589 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 590 591 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 592 593 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 594 595 /* Copy MAC header from skb into command buffer */ 596 memcpy(tx_cmd->hdr, hdr, hdrlen); 597 598 out: 599 return dev_cmd; 600 } 601 602 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 603 struct iwl_device_tx_cmd *cmd) 604 { 605 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 606 607 memset(&skb_info->status, 0, sizeof(skb_info->status)); 608 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 609 610 skb_info->driver_data[1] = cmd; 611 } 612 613 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 614 struct iwl_mvm_vif_link_info *link, 615 struct ieee80211_tx_info *info, 616 struct sk_buff *skb) 617 { 618 struct ieee80211_hdr *hdr = (void *)skb->data; 619 __le16 fc = hdr->frame_control; 620 621 switch (info->control.vif->type) { 622 case NL80211_IFTYPE_AP: 623 case NL80211_IFTYPE_ADHOC: 624 /* 625 * Non-bufferable frames use the broadcast station, thus they 626 * use the probe queue. 627 * Also take care of the case where we send a deauth to a 628 * station that we don't have, or similarly an association 629 * response (with non-success status) for a station we can't 630 * accept. 631 * Also, disassociate frames might happen, particular with 632 * reason 7 ("Class 3 frame received from nonassociated STA"). 633 */ 634 if (ieee80211_is_mgmt(fc) && 635 (!ieee80211_is_bufferable_mmpdu(skb) || 636 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 637 return link->mgmt_queue; 638 639 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 640 is_multicast_ether_addr(hdr->addr1)) 641 return link->cab_queue; 642 643 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 644 "fc=0x%02x", le16_to_cpu(fc)); 645 return link->mgmt_queue; 646 case NL80211_IFTYPE_P2P_DEVICE: 647 if (ieee80211_is_mgmt(fc)) 648 return mvm->p2p_dev_queue; 649 650 WARN_ON_ONCE(1); 651 return mvm->p2p_dev_queue; 652 default: 653 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 654 return -1; 655 } 656 } 657 658 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 659 struct sk_buff *skb) 660 { 661 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 662 struct iwl_mvm_vif *mvmvif = 663 iwl_mvm_vif_from_mac80211(info->control.vif); 664 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 665 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 666 struct iwl_probe_resp_data *resp_data; 667 const u8 *ie; 668 u8 *pos; 669 u8 match[] = { 670 (WLAN_OUI_WFA >> 16) & 0xff, 671 (WLAN_OUI_WFA >> 8) & 0xff, 672 WLAN_OUI_WFA & 0xff, 673 WLAN_OUI_TYPE_WFA_P2P, 674 }; 675 676 rcu_read_lock(); 677 678 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data); 679 if (!resp_data) 680 goto out; 681 682 if (!resp_data->notif.noa_active) 683 goto out; 684 685 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 686 mgmt->u.probe_resp.variable, 687 skb->len - base_len, 688 match, 4, 2); 689 if (!ie) { 690 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 691 goto out; 692 } 693 694 if (skb_tailroom(skb) < resp_data->noa_len) { 695 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 696 IWL_ERR(mvm, 697 "Failed to reallocate probe resp\n"); 698 goto out; 699 } 700 } 701 702 pos = skb_put(skb, resp_data->noa_len); 703 704 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 705 /* Set length of IE body (not including ID and length itself) */ 706 *pos++ = resp_data->noa_len - 2; 707 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 708 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 709 *pos++ = WLAN_OUI_WFA & 0xff; 710 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 711 712 memcpy(pos, &resp_data->notif.noa_attr, 713 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 714 715 out: 716 rcu_read_unlock(); 717 } 718 719 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 720 { 721 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 722 struct ieee80211_tx_info info; 723 struct iwl_device_tx_cmd *dev_cmd; 724 u8 sta_id; 725 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 726 __le16 fc = hdr->frame_control; 727 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 728 IEEE80211_TX_CTL_TX_OFFCHAN; 729 int queue = -1; 730 731 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 732 return -1; 733 734 memcpy(&info, skb->cb, sizeof(info)); 735 736 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 737 return -1; 738 739 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 740 return -1; 741 742 if (info.control.vif) { 743 struct iwl_mvm_vif *mvmvif = 744 iwl_mvm_vif_from_mac80211(info.control.vif); 745 746 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 747 info.control.vif->type == NL80211_IFTYPE_AP || 748 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 749 u32 link_id = u32_get_bits(info.control.flags, 750 IEEE80211_TX_CTRL_MLO_LINK); 751 struct iwl_mvm_vif_link_info *link; 752 753 if (link_id == IEEE80211_LINK_UNSPECIFIED) { 754 if (info.control.vif->active_links) 755 link_id = ffs(info.control.vif->active_links) - 1; 756 else 757 link_id = 0; 758 } 759 760 link = mvmvif->link[link_id]; 761 if (WARN_ON(!link)) 762 return -1; 763 764 if (!ieee80211_is_data(hdr->frame_control)) 765 sta_id = link->bcast_sta.sta_id; 766 else 767 sta_id = link->mcast_sta.sta_id; 768 769 queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info, 770 skb); 771 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 772 queue = mvm->snif_queue; 773 sta_id = mvm->snif_sta.sta_id; 774 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 775 offchannel) { 776 /* 777 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 778 * that can be used in 2 different types of vifs, P2P & 779 * STATION. 780 * P2P uses the offchannel queue. 781 * STATION (HS2.0) uses the auxiliary context of the FW, 782 * and hence needs to be sent on the aux queue. 783 */ 784 sta_id = mvm->aux_sta.sta_id; 785 queue = mvm->aux_queue; 786 } 787 } 788 789 if (queue < 0) { 790 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 791 return -1; 792 } 793 794 if (unlikely(ieee80211_is_probe_resp(fc))) 795 iwl_mvm_probe_resp_set_noa(mvm, skb); 796 797 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 798 799 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 800 if (!dev_cmd) 801 return -1; 802 803 /* From now on, we cannot access info->control */ 804 iwl_mvm_skb_prepare_status(skb, dev_cmd); 805 806 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 807 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 808 return -1; 809 } 810 811 return 0; 812 } 813 814 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 815 struct ieee80211_sta *sta, unsigned int tid) 816 { 817 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 818 u8 ac = tid_to_mac80211_ac[tid]; 819 enum nl80211_band band; 820 unsigned int txf; 821 unsigned int val; 822 int lmac; 823 824 /* For HE redirect to trigger based fifos */ 825 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 826 ac += 4; 827 828 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 829 830 /* 831 * Don't send an AMSDU that will be longer than the TXF. 832 * Add a security margin of 256 for the TX command + headers. 833 * We also want to have the start of the next packet inside the 834 * fifo to be able to send bursts. 835 */ 836 val = mvmsta->max_amsdu_len; 837 838 if (hweight16(sta->valid_links) <= 1) { 839 if (sta->valid_links) { 840 struct ieee80211_bss_conf *link_conf; 841 unsigned int link = ffs(sta->valid_links) - 1; 842 843 rcu_read_lock(); 844 link_conf = rcu_dereference(mvmsta->vif->link_conf[link]); 845 if (WARN_ON(!link_conf)) 846 band = NL80211_BAND_2GHZ; 847 else 848 band = link_conf->chandef.chan->band; 849 rcu_read_unlock(); 850 } else { 851 band = mvmsta->vif->bss_conf.chandef.chan->band; 852 } 853 854 lmac = iwl_mvm_get_lmac_id(mvm, band); 855 } else if (fw_has_capa(&mvm->fw->ucode_capa, 856 IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) { 857 /* for real MLO restrict to both LMACs if they exist */ 858 lmac = IWL_LMAC_5G_INDEX; 859 val = min_t(unsigned int, val, 860 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 861 lmac = IWL_LMAC_24G_INDEX; 862 } else { 863 lmac = IWL_LMAC_24G_INDEX; 864 } 865 866 return min_t(unsigned int, val, 867 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 868 } 869 870 #ifdef CONFIG_INET 871 872 static int 873 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 874 netdev_features_t netdev_flags, 875 struct sk_buff_head *mpdus_skb) 876 { 877 struct sk_buff *tmp, *next; 878 struct ieee80211_hdr *hdr = (void *)skb->data; 879 char cb[sizeof(skb->cb)]; 880 u16 i = 0; 881 unsigned int tcp_payload_len; 882 unsigned int mss = skb_shinfo(skb)->gso_size; 883 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 884 bool qos = ieee80211_is_data_qos(hdr->frame_control); 885 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 886 887 skb_shinfo(skb)->gso_size = num_subframes * mss; 888 memcpy(cb, skb->cb, sizeof(cb)); 889 890 next = skb_gso_segment(skb, netdev_flags); 891 skb_shinfo(skb)->gso_size = mss; 892 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 893 if (WARN_ON_ONCE(IS_ERR(next))) 894 return -EINVAL; 895 else if (next) 896 consume_skb(skb); 897 898 skb_list_walk_safe(next, tmp, next) { 899 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 900 /* 901 * Compute the length of all the data added for the A-MSDU. 902 * This will be used to compute the length to write in the TX 903 * command. We have: SNAP + IP + TCP for n -1 subframes and 904 * ETH header for n subframes. 905 */ 906 tcp_payload_len = skb_tail_pointer(tmp) - 907 skb_transport_header(tmp) - 908 tcp_hdrlen(tmp) + tmp->data_len; 909 910 if (ipv4) 911 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 912 913 if (tcp_payload_len > mss) { 914 skb_shinfo(tmp)->gso_size = mss; 915 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 : 916 SKB_GSO_TCPV6; 917 } else { 918 if (qos) { 919 u8 *qc; 920 921 if (ipv4) 922 ip_send_check(ip_hdr(tmp)); 923 924 qc = ieee80211_get_qos_ctl((void *)tmp->data); 925 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 926 } 927 skb_shinfo(tmp)->gso_size = 0; 928 } 929 930 skb_mark_not_on_list(tmp); 931 __skb_queue_tail(mpdus_skb, tmp); 932 i++; 933 } 934 935 return 0; 936 } 937 938 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 939 struct ieee80211_tx_info *info, 940 struct ieee80211_sta *sta, 941 struct sk_buff_head *mpdus_skb) 942 { 943 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 944 struct ieee80211_hdr *hdr = (void *)skb->data; 945 unsigned int mss = skb_shinfo(skb)->gso_size; 946 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 947 u16 snap_ip_tcp, pad; 948 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 949 u8 tid; 950 951 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 952 tcp_hdrlen(skb); 953 954 if (!mvmsta->max_amsdu_len || 955 !ieee80211_is_data_qos(hdr->frame_control) || 956 !mvmsta->amsdu_enabled) 957 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 958 959 /* 960 * Do not build AMSDU for IPv6 with extension headers. 961 * ask stack to segment and checkum the generated MPDUs for us. 962 */ 963 if (skb->protocol == htons(ETH_P_IPV6) && 964 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 965 IPPROTO_TCP) { 966 netdev_flags &= ~NETIF_F_CSUM_MASK; 967 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 968 } 969 970 tid = ieee80211_get_tid(hdr); 971 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 972 return -EINVAL; 973 974 /* 975 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 976 * during an BA session. 977 */ 978 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 979 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 980 !(mvmsta->amsdu_enabled & BIT(tid))) 981 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 982 983 /* 984 * Take the min of ieee80211 station and mvm station 985 */ 986 max_amsdu_len = 987 min_t(unsigned int, sta->cur->max_amsdu_len, 988 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 989 990 /* 991 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 992 * supported. This is a spec requirement (IEEE 802.11-2015 993 * section 8.7.3 NOTE 3). 994 */ 995 if (info->flags & IEEE80211_TX_CTL_AMPDU && 996 !sta->deflink.vht_cap.vht_supported) 997 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 998 999 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 1000 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 1001 pad = (4 - subf_len) & 0x3; 1002 1003 /* 1004 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 1005 * N * subf_len + (N - 1) * pad. 1006 */ 1007 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 1008 1009 if (sta->max_amsdu_subframes && 1010 num_subframes > sta->max_amsdu_subframes) 1011 num_subframes = sta->max_amsdu_subframes; 1012 1013 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1014 tcp_hdrlen(skb) + skb->data_len; 1015 1016 /* 1017 * Make sure we have enough TBs for the A-MSDU: 1018 * 2 for each subframe 1019 * 1 more for each fragment 1020 * 1 more for the potential data in the header 1021 */ 1022 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 1023 mvm->trans->max_skb_frags) 1024 num_subframes = 1; 1025 1026 if (num_subframes > 1) 1027 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1028 1029 /* This skb fits in one single A-MSDU */ 1030 if (num_subframes * mss >= tcp_payload_len) { 1031 __skb_queue_tail(mpdus_skb, skb); 1032 return 0; 1033 } 1034 1035 /* 1036 * Trick the segmentation function to make it 1037 * create SKBs that can fit into one A-MSDU. 1038 */ 1039 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 1040 mpdus_skb); 1041 } 1042 #else /* CONFIG_INET */ 1043 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 1044 struct ieee80211_tx_info *info, 1045 struct ieee80211_sta *sta, 1046 struct sk_buff_head *mpdus_skb) 1047 { 1048 /* Impossible to get TSO with CONFIG_INET */ 1049 WARN_ON(1); 1050 1051 return -1; 1052 } 1053 #endif 1054 1055 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1056 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1057 { 1058 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1059 unsigned long now = jiffies; 1060 int tid; 1061 1062 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1063 return false; 1064 1065 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1066 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1067 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1068 return true; 1069 } 1070 1071 return false; 1072 } 1073 1074 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1075 struct iwl_mvm_sta *mvmsta, 1076 int airtime) 1077 { 1078 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1079 struct iwl_mvm_tcm_mac *mdata; 1080 1081 if (mac >= NUM_MAC_INDEX_DRIVER) 1082 return; 1083 1084 mdata = &mvm->tcm.data[mac]; 1085 1086 if (mvm->tcm.paused) 1087 return; 1088 1089 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1090 schedule_delayed_work(&mvm->tcm.work, 0); 1091 1092 mdata->tx.airtime += airtime; 1093 } 1094 1095 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1096 struct iwl_mvm_sta *mvmsta, int tid) 1097 { 1098 u32 ac = tid_to_mac80211_ac[tid]; 1099 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1100 struct iwl_mvm_tcm_mac *mdata; 1101 1102 if (mac >= NUM_MAC_INDEX_DRIVER) 1103 return -EINVAL; 1104 1105 mdata = &mvm->tcm.data[mac]; 1106 1107 mdata->tx.pkts[ac]++; 1108 1109 return 0; 1110 } 1111 1112 /* 1113 * Sets the fields in the Tx cmd that are crypto related. 1114 * 1115 * This function must be called with BHs disabled. 1116 */ 1117 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1118 struct ieee80211_tx_info *info, 1119 struct ieee80211_sta *sta) 1120 { 1121 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1122 struct iwl_mvm_sta *mvmsta; 1123 struct iwl_device_tx_cmd *dev_cmd; 1124 __le16 fc; 1125 u16 seq_number = 0; 1126 u8 tid = IWL_MAX_TID_COUNT; 1127 u16 txq_id; 1128 bool is_ampdu = false; 1129 int hdrlen; 1130 1131 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1132 fc = hdr->frame_control; 1133 hdrlen = ieee80211_hdrlen(fc); 1134 1135 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1136 return -1; 1137 1138 if (WARN_ON_ONCE(!mvmsta)) 1139 return -1; 1140 1141 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1142 return -1; 1143 1144 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he) 1145 return -1; 1146 1147 if (unlikely(ieee80211_is_probe_resp(fc))) 1148 iwl_mvm_probe_resp_set_noa(mvm, skb); 1149 1150 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1151 sta, mvmsta->deflink.sta_id); 1152 if (!dev_cmd) 1153 goto drop; 1154 1155 /* 1156 * we handle that entirely ourselves -- for uAPSD the firmware 1157 * will always send a notification, and for PS-Poll responses 1158 * we'll notify mac80211 when getting frame status 1159 */ 1160 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1161 1162 spin_lock(&mvmsta->lock); 1163 1164 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1165 * the conditions of !ieee80211_is_qos_nullfunc(fc) and 1166 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID 1167 */ 1168 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1169 tid = ieee80211_get_tid(hdr); 1170 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1171 goto drop_unlock_sta; 1172 1173 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1174 if (WARN_ONCE(is_ampdu && 1175 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1176 "Invalid internal agg state %d for TID %d", 1177 mvmsta->tid_data[tid].state, tid)) 1178 goto drop_unlock_sta; 1179 1180 seq_number = mvmsta->tid_data[tid].seq_number; 1181 seq_number &= IEEE80211_SCTL_SEQ; 1182 1183 if (!iwl_mvm_has_new_tx_api(mvm)) { 1184 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1185 1186 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1187 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1188 /* update the tx_cmd hdr as it was already copied */ 1189 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1190 } 1191 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) && 1192 !ieee80211_is_nullfunc(fc)) { 1193 tid = IWL_TID_NON_QOS; 1194 } 1195 1196 txq_id = mvmsta->tid_data[tid].txq_id; 1197 1198 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1199 1200 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1201 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1202 spin_unlock(&mvmsta->lock); 1203 return -1; 1204 } 1205 1206 if (!iwl_mvm_has_new_tx_api(mvm)) { 1207 /* Keep track of the time of the last frame for this RA/TID */ 1208 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1209 1210 /* 1211 * If we have timed-out TIDs - schedule the worker that will 1212 * reconfig the queues and update them 1213 * 1214 * Note that the no lock is taken here in order to not serialize 1215 * the TX flow. This isn't dangerous because scheduling 1216 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1217 * schedule it due to some race condition then next TX we get 1218 * here we will. 1219 */ 1220 if (unlikely(mvm->queue_info[txq_id].status == 1221 IWL_MVM_QUEUE_SHARED && 1222 iwl_mvm_txq_should_update(mvm, txq_id))) 1223 schedule_work(&mvm->add_stream_wk); 1224 } 1225 1226 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1227 mvmsta->deflink.sta_id, tid, txq_id, 1228 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1229 1230 /* From now on, we cannot access info->control */ 1231 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1232 1233 /* 1234 * The IV is introduced by the HW for new tx api, and it is not present 1235 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the 1236 * IV for those devices. 1237 */ 1238 if (ieee80211_is_data(fc)) 1239 iwl_mvm_mei_tx_copy_to_csme(mvm, skb, 1240 info->control.hw_key && 1241 !iwl_mvm_has_new_tx_api(mvm) ? 1242 info->control.hw_key->iv_len : 0); 1243 1244 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1245 goto drop_unlock_sta; 1246 1247 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1248 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1249 1250 spin_unlock(&mvmsta->lock); 1251 1252 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1253 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1254 goto drop; 1255 1256 return 0; 1257 1258 drop_unlock_sta: 1259 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1260 spin_unlock(&mvmsta->lock); 1261 drop: 1262 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id, 1263 tid); 1264 return -1; 1265 } 1266 1267 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1268 struct ieee80211_sta *sta) 1269 { 1270 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1271 struct ieee80211_tx_info info; 1272 struct sk_buff_head mpdus_skbs; 1273 unsigned int payload_len; 1274 int ret; 1275 struct sk_buff *orig_skb = skb; 1276 1277 if (WARN_ON_ONCE(!mvmsta)) 1278 return -1; 1279 1280 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1281 return -1; 1282 1283 memcpy(&info, skb->cb, sizeof(info)); 1284 1285 if (!skb_is_gso(skb)) 1286 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1287 1288 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1289 tcp_hdrlen(skb) + skb->data_len; 1290 1291 if (payload_len <= skb_shinfo(skb)->gso_size) 1292 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1293 1294 __skb_queue_head_init(&mpdus_skbs); 1295 1296 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1297 if (ret) 1298 return ret; 1299 1300 WARN_ON(skb_queue_empty(&mpdus_skbs)); 1301 1302 while (!skb_queue_empty(&mpdus_skbs)) { 1303 skb = __skb_dequeue(&mpdus_skbs); 1304 1305 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1306 if (ret) { 1307 /* Free skbs created as part of TSO logic that have not yet been dequeued */ 1308 __skb_queue_purge(&mpdus_skbs); 1309 /* skb here is not necessarily same as skb that entered this method, 1310 * so free it explicitly. 1311 */ 1312 if (skb == orig_skb) 1313 ieee80211_free_txskb(mvm->hw, skb); 1314 else 1315 kfree_skb(skb); 1316 /* there was error, but we consumed skb one way or another, so return 0 */ 1317 return 0; 1318 } 1319 } 1320 1321 return 0; 1322 } 1323 1324 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1325 struct ieee80211_sta *sta, u8 tid) 1326 { 1327 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1328 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1329 struct ieee80211_vif *vif = mvmsta->vif; 1330 u16 normalized_ssn; 1331 1332 lockdep_assert_held(&mvmsta->lock); 1333 1334 if ((tid_data->state == IWL_AGG_ON || 1335 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1336 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1337 /* 1338 * Now that this aggregation or DQA queue is empty tell 1339 * mac80211 so it knows we no longer have frames buffered for 1340 * the station on this TID (for the TIM bitmap calculation.) 1341 */ 1342 ieee80211_sta_set_buffered(sta, tid, false); 1343 } 1344 1345 /* 1346 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1347 * to align the wrap around of ssn so we compare relevant values. 1348 */ 1349 normalized_ssn = tid_data->ssn; 1350 if (mvm->trans->trans_cfg->gen2) 1351 normalized_ssn &= 0xff; 1352 1353 if (normalized_ssn != tid_data->next_reclaimed) 1354 return; 1355 1356 switch (tid_data->state) { 1357 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1358 IWL_DEBUG_TX_QUEUES(mvm, 1359 "Can continue addBA flow ssn = next_recl = %d\n", 1360 tid_data->next_reclaimed); 1361 tid_data->state = IWL_AGG_STARTING; 1362 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1363 break; 1364 1365 case IWL_EMPTYING_HW_QUEUE_DELBA: 1366 IWL_DEBUG_TX_QUEUES(mvm, 1367 "Can continue DELBA flow ssn = next_recl = %d\n", 1368 tid_data->next_reclaimed); 1369 tid_data->state = IWL_AGG_OFF; 1370 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1371 break; 1372 1373 default: 1374 break; 1375 } 1376 } 1377 1378 #ifdef CONFIG_IWLWIFI_DEBUG 1379 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1380 { 1381 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1382 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1383 1384 switch (status & TX_STATUS_MSK) { 1385 case TX_STATUS_SUCCESS: 1386 return "SUCCESS"; 1387 TX_STATUS_POSTPONE(DELAY); 1388 TX_STATUS_POSTPONE(FEW_BYTES); 1389 TX_STATUS_POSTPONE(BT_PRIO); 1390 TX_STATUS_POSTPONE(QUIET_PERIOD); 1391 TX_STATUS_POSTPONE(CALC_TTAK); 1392 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1393 TX_STATUS_FAIL(SHORT_LIMIT); 1394 TX_STATUS_FAIL(LONG_LIMIT); 1395 TX_STATUS_FAIL(UNDERRUN); 1396 TX_STATUS_FAIL(DRAIN_FLOW); 1397 TX_STATUS_FAIL(RFKILL_FLUSH); 1398 TX_STATUS_FAIL(LIFE_EXPIRE); 1399 TX_STATUS_FAIL(DEST_PS); 1400 TX_STATUS_FAIL(HOST_ABORTED); 1401 TX_STATUS_FAIL(BT_RETRY); 1402 TX_STATUS_FAIL(STA_INVALID); 1403 TX_STATUS_FAIL(FRAG_DROPPED); 1404 TX_STATUS_FAIL(TID_DISABLE); 1405 TX_STATUS_FAIL(FIFO_FLUSHED); 1406 TX_STATUS_FAIL(SMALL_CF_POLL); 1407 TX_STATUS_FAIL(FW_DROP); 1408 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1409 } 1410 1411 return "UNKNOWN"; 1412 1413 #undef TX_STATUS_FAIL 1414 #undef TX_STATUS_POSTPONE 1415 } 1416 #endif /* CONFIG_IWLWIFI_DEBUG */ 1417 1418 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1419 { 1420 switch (chan_width) { 1421 case RATE_MCS_CHAN_WIDTH_20: 1422 return 0; 1423 case RATE_MCS_CHAN_WIDTH_40: 1424 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1425 case RATE_MCS_CHAN_WIDTH_80: 1426 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1427 case RATE_MCS_CHAN_WIDTH_160: 1428 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1429 default: 1430 return 0; 1431 } 1432 } 1433 1434 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1435 enum nl80211_band band, 1436 struct ieee80211_tx_rate *r) 1437 { 1438 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1439 u32 rate = format == RATE_MCS_HT_MSK ? 1440 RATE_HT_MCS_INDEX(rate_n_flags) : 1441 rate_n_flags & RATE_MCS_CODE_MSK; 1442 1443 r->flags |= 1444 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1445 RATE_MCS_CHAN_WIDTH_MSK); 1446 1447 if (rate_n_flags & RATE_MCS_SGI_MSK) 1448 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1449 if (format == RATE_MCS_HT_MSK) { 1450 r->flags |= IEEE80211_TX_RC_MCS; 1451 r->idx = rate; 1452 } else if (format == RATE_MCS_VHT_MSK) { 1453 ieee80211_rate_set_vht(r, rate, 1454 FIELD_GET(RATE_MCS_NSS_MSK, 1455 rate_n_flags) + 1); 1456 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1457 } else if (format == RATE_MCS_HE_MSK) { 1458 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1459 * but it only matters for radiotap */ 1460 r->idx = 0; 1461 } else { 1462 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1463 band); 1464 } 1465 } 1466 1467 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags, 1468 enum nl80211_band band, 1469 struct ieee80211_tx_rate *r) 1470 { 1471 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1472 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1473 1474 r->flags |= 1475 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1476 RATE_MCS_CHAN_WIDTH_MSK_V1); 1477 1478 if (rate_n_flags & RATE_MCS_SGI_MSK_V1) 1479 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1480 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 1481 r->flags |= IEEE80211_TX_RC_MCS; 1482 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 1483 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 1484 ieee80211_rate_set_vht( 1485 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1486 FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1); 1487 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1488 } else { 1489 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1490 band); 1491 } 1492 } 1493 1494 /* 1495 * translate ucode response to mac80211 tx status control values 1496 */ 1497 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw, 1498 u32 rate_n_flags, 1499 struct ieee80211_tx_info *info) 1500 { 1501 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1502 1503 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP, 1504 TX_CMD, 0) <= 6) 1505 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1506 1507 info->status.antenna = 1508 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1509 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, 1510 info->band, r); 1511 } 1512 1513 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1514 u32 status, __le16 frame_control) 1515 { 1516 struct iwl_fw_dbg_trigger_tlv *trig; 1517 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1518 int i; 1519 1520 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1521 enum iwl_fw_ini_time_point tp = 1522 IWL_FW_INI_TIME_POINT_TX_FAILED; 1523 1524 if (ieee80211_is_action(frame_control)) 1525 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1526 1527 iwl_dbg_tlv_time_point(&mvm->fwrt, 1528 tp, NULL); 1529 return; 1530 } 1531 1532 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1533 FW_DBG_TRIGGER_TX_STATUS); 1534 if (!trig) 1535 return; 1536 1537 status_trig = (void *)trig->data; 1538 1539 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1540 /* don't collect on status 0 */ 1541 if (!status_trig->statuses[i].status) 1542 break; 1543 1544 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1545 continue; 1546 1547 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1548 "Tx status %d was received", 1549 status & TX_STATUS_MSK); 1550 break; 1551 } 1552 } 1553 1554 /* 1555 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1556 * @tx_resp: the Tx response from the fw (agg or non-agg) 1557 * 1558 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1559 * it can't know that everything will go well until the end of the AMPDU, it 1560 * can't know in advance the number of MPDUs that will be sent in the current 1561 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1562 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1563 * of the batch. This is why the SSN of the SCD is written at the end of the 1564 * whole struct at a variable offset. This function knows how to cope with the 1565 * variable offset and returns the SSN of the SCD. 1566 */ 1567 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1568 struct iwl_mvm_tx_resp *tx_resp) 1569 { 1570 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1571 tx_resp->frame_count) & 0xfff; 1572 } 1573 1574 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1575 struct iwl_rx_packet *pkt) 1576 { 1577 struct ieee80211_sta *sta; 1578 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1579 int txq_id = SEQ_TO_QUEUE(sequence); 1580 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1581 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1582 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1583 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1584 struct agg_tx_status *agg_status = 1585 iwl_mvm_get_agg_status(mvm, tx_resp); 1586 u32 status = le16_to_cpu(agg_status->status); 1587 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1588 struct sk_buff_head skbs; 1589 u8 skb_freed = 0; 1590 u8 lq_color; 1591 u16 next_reclaimed, seq_ctl; 1592 bool is_ndp = false; 1593 1594 __skb_queue_head_init(&skbs); 1595 1596 if (iwl_mvm_has_new_tx_api(mvm)) 1597 txq_id = le16_to_cpu(tx_resp->tx_queue); 1598 1599 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1600 1601 /* we can free until ssn % q.n_bd not inclusive */ 1602 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1603 1604 while (!skb_queue_empty(&skbs)) { 1605 struct sk_buff *skb = __skb_dequeue(&skbs); 1606 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1607 struct ieee80211_hdr *hdr = (void *)skb->data; 1608 bool flushed = false; 1609 1610 skb_freed++; 1611 1612 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1613 1614 memset(&info->status, 0, sizeof(info->status)); 1615 1616 /* inform mac80211 about what happened with the frame */ 1617 switch (status & TX_STATUS_MSK) { 1618 case TX_STATUS_SUCCESS: 1619 case TX_STATUS_DIRECT_DONE: 1620 info->flags |= IEEE80211_TX_STAT_ACK; 1621 break; 1622 case TX_STATUS_FAIL_FIFO_FLUSHED: 1623 case TX_STATUS_FAIL_DRAIN_FLOW: 1624 flushed = true; 1625 break; 1626 case TX_STATUS_FAIL_DEST_PS: 1627 /* the FW should have stopped the queue and not 1628 * return this status 1629 */ 1630 IWL_ERR_LIMIT(mvm, 1631 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1632 status, le16_to_cpu(hdr->frame_control)); 1633 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1634 break; 1635 default: 1636 break; 1637 } 1638 1639 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1640 ieee80211_is_mgmt(hdr->frame_control)) 1641 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1642 1643 /* 1644 * If we are freeing multiple frames, mark all the frames 1645 * but the first one as acked, since they were acknowledged 1646 * before 1647 * */ 1648 if (skb_freed > 1) 1649 info->flags |= IEEE80211_TX_STAT_ACK; 1650 1651 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1652 1653 info->status.rates[0].count = tx_resp->failure_frame + 1; 1654 1655 iwl_mvm_hwrate_to_tx_status(mvm->fw, 1656 le32_to_cpu(tx_resp->initial_rate), 1657 info); 1658 1659 /* Don't assign the converted initial_rate, because driver 1660 * TLC uses this and doesn't support the new FW rate 1661 */ 1662 info->status.status_driver_data[1] = 1663 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1664 1665 /* Single frame failure in an AMPDU queue => send BAR */ 1666 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1667 !(info->flags & IEEE80211_TX_STAT_ACK) && 1668 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1669 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1670 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1671 1672 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1673 if (ieee80211_is_back_req(hdr->frame_control)) 1674 seq_ctl = 0; 1675 else if (status != TX_STATUS_SUCCESS) 1676 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1677 1678 if (unlikely(!seq_ctl)) { 1679 /* 1680 * If it is an NDP, we can't update next_reclaim since 1681 * its sequence control is 0. Note that for that same 1682 * reason, NDPs are never sent to A-MPDU'able queues 1683 * so that we can never have more than one freed frame 1684 * for a single Tx resonse (see WARN_ON below). 1685 */ 1686 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1687 is_ndp = true; 1688 } 1689 1690 /* 1691 * TODO: this is not accurate if we are freeing more than one 1692 * packet. 1693 */ 1694 info->status.tx_time = 1695 le16_to_cpu(tx_resp->wireless_media_time); 1696 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1697 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1698 info->status.status_driver_data[0] = 1699 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1700 1701 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1))) 1702 ieee80211_tx_status(mvm->hw, skb); 1703 } 1704 1705 /* This is an aggregation queue or might become one, so we use 1706 * the ssn since: ssn = wifi seq_num % 256. 1707 * The seq_ctl is the sequence control of the packet to which 1708 * this Tx response relates. But if there is a hole in the 1709 * bitmap of the BA we received, this Tx response may allow to 1710 * reclaim the hole and all the subsequent packets that were 1711 * already acked. In that case, seq_ctl != ssn, and the next 1712 * packet to be reclaimed will be ssn and not seq_ctl. In that 1713 * case, several packets will be reclaimed even if 1714 * frame_count = 1. 1715 * 1716 * The ssn is the index (% 256) of the latest packet that has 1717 * treated (acked / dropped) + 1. 1718 */ 1719 next_reclaimed = ssn; 1720 1721 IWL_DEBUG_TX_REPLY(mvm, 1722 "TXQ %d status %s (0x%08x)\n", 1723 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1724 1725 IWL_DEBUG_TX_REPLY(mvm, 1726 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1727 le32_to_cpu(tx_resp->initial_rate), 1728 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1729 ssn, next_reclaimed, seq_ctl); 1730 1731 rcu_read_lock(); 1732 1733 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1734 /* 1735 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1736 * the firmware while we still have packets for it in the Tx queues. 1737 */ 1738 if (WARN_ON_ONCE(!sta)) 1739 goto out; 1740 1741 if (!IS_ERR(sta)) { 1742 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1743 1744 iwl_mvm_tx_airtime(mvm, mvmsta, 1745 le16_to_cpu(tx_resp->wireless_media_time)); 1746 1747 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1748 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1749 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1750 1751 if (sta->wme && tid != IWL_MGMT_TID) { 1752 struct iwl_mvm_tid_data *tid_data = 1753 &mvmsta->tid_data[tid]; 1754 bool send_eosp_ndp = false; 1755 1756 spin_lock_bh(&mvmsta->lock); 1757 1758 if (!is_ndp) { 1759 tid_data->next_reclaimed = next_reclaimed; 1760 IWL_DEBUG_TX_REPLY(mvm, 1761 "Next reclaimed packet:%d\n", 1762 next_reclaimed); 1763 } else { 1764 IWL_DEBUG_TX_REPLY(mvm, 1765 "NDP - don't update next_reclaimed\n"); 1766 } 1767 1768 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1769 1770 if (mvmsta->sleep_tx_count) { 1771 mvmsta->sleep_tx_count--; 1772 if (mvmsta->sleep_tx_count && 1773 !iwl_mvm_tid_queued(mvm, tid_data)) { 1774 /* 1775 * The number of frames in the queue 1776 * dropped to 0 even if we sent less 1777 * frames than we thought we had on the 1778 * Tx queue. 1779 * This means we had holes in the BA 1780 * window that we just filled, ask 1781 * mac80211 to send EOSP since the 1782 * firmware won't know how to do that. 1783 * Send NDP and the firmware will send 1784 * EOSP notification that will trigger 1785 * a call to ieee80211_sta_eosp(). 1786 */ 1787 send_eosp_ndp = true; 1788 } 1789 } 1790 1791 spin_unlock_bh(&mvmsta->lock); 1792 if (send_eosp_ndp) { 1793 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1794 IEEE80211_FRAME_RELEASE_UAPSD, 1795 1, tid, false, false); 1796 mvmsta->sleep_tx_count = 0; 1797 ieee80211_send_eosp_nullfunc(sta, tid); 1798 } 1799 } 1800 1801 if (mvmsta->next_status_eosp) { 1802 mvmsta->next_status_eosp = false; 1803 ieee80211_sta_eosp(sta); 1804 } 1805 } 1806 out: 1807 rcu_read_unlock(); 1808 } 1809 1810 #ifdef CONFIG_IWLWIFI_DEBUG 1811 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1812 static const char *iwl_get_agg_tx_status(u16 status) 1813 { 1814 switch (status & AGG_TX_STATE_STATUS_MSK) { 1815 AGG_TX_STATE_(TRANSMITTED); 1816 AGG_TX_STATE_(UNDERRUN); 1817 AGG_TX_STATE_(BT_PRIO); 1818 AGG_TX_STATE_(FEW_BYTES); 1819 AGG_TX_STATE_(ABORT); 1820 AGG_TX_STATE_(TX_ON_AIR_DROP); 1821 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1822 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1823 AGG_TX_STATE_(SCD_QUERY); 1824 AGG_TX_STATE_(TEST_BAD_CRC32); 1825 AGG_TX_STATE_(RESPONSE); 1826 AGG_TX_STATE_(DUMP_TX); 1827 AGG_TX_STATE_(DELAY_TX); 1828 } 1829 1830 return "UNKNOWN"; 1831 } 1832 1833 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1834 struct iwl_rx_packet *pkt) 1835 { 1836 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1837 struct agg_tx_status *frame_status = 1838 iwl_mvm_get_agg_status(mvm, tx_resp); 1839 int i; 1840 bool tirgger_timepoint = false; 1841 1842 for (i = 0; i < tx_resp->frame_count; i++) { 1843 u16 fstatus = le16_to_cpu(frame_status[i].status); 1844 /* In case one frame wasn't transmitted trigger time point */ 1845 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1846 AGG_TX_STATE_TRANSMITTED); 1847 IWL_DEBUG_TX_REPLY(mvm, 1848 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1849 iwl_get_agg_tx_status(fstatus), 1850 fstatus & AGG_TX_STATE_STATUS_MSK, 1851 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1852 AGG_TX_STATE_TRY_CNT_POS, 1853 le16_to_cpu(frame_status[i].sequence)); 1854 } 1855 1856 if (tirgger_timepoint) 1857 iwl_dbg_tlv_time_point(&mvm->fwrt, 1858 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1859 1860 } 1861 #else 1862 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1863 struct iwl_rx_packet *pkt) 1864 {} 1865 #endif /* CONFIG_IWLWIFI_DEBUG */ 1866 1867 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1868 struct iwl_rx_packet *pkt) 1869 { 1870 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1871 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1872 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1873 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1874 struct iwl_mvm_sta *mvmsta; 1875 int queue = SEQ_TO_QUEUE(sequence); 1876 struct ieee80211_sta *sta; 1877 1878 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1879 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1880 return; 1881 1882 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1883 1884 rcu_read_lock(); 1885 1886 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1887 1888 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1889 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) { 1890 rcu_read_unlock(); 1891 return; 1892 } 1893 1894 if (!WARN_ON_ONCE(!mvmsta)) { 1895 mvmsta->tid_data[tid].rate_n_flags = 1896 le32_to_cpu(tx_resp->initial_rate); 1897 mvmsta->tid_data[tid].tx_time = 1898 le16_to_cpu(tx_resp->wireless_media_time); 1899 mvmsta->tid_data[tid].lq_color = 1900 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1901 iwl_mvm_tx_airtime(mvm, mvmsta, 1902 le16_to_cpu(tx_resp->wireless_media_time)); 1903 } 1904 1905 rcu_read_unlock(); 1906 } 1907 1908 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1909 { 1910 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1911 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1912 1913 if (tx_resp->frame_count == 1) 1914 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1915 else 1916 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1917 } 1918 1919 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1920 int txq, int index, 1921 struct ieee80211_tx_info *tx_info, u32 rate, 1922 bool is_flush) 1923 { 1924 struct sk_buff_head reclaimed_skbs; 1925 struct iwl_mvm_tid_data *tid_data = NULL; 1926 struct ieee80211_sta *sta; 1927 struct iwl_mvm_sta *mvmsta = NULL; 1928 struct sk_buff *skb; 1929 int freed; 1930 1931 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1932 tid > IWL_MAX_TID_COUNT, 1933 "sta_id %d tid %d", sta_id, tid)) 1934 return; 1935 1936 rcu_read_lock(); 1937 1938 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1939 1940 /* Reclaiming frames for a station that has been deleted ? */ 1941 if (WARN_ON_ONCE(!sta)) { 1942 rcu_read_unlock(); 1943 return; 1944 } 1945 1946 __skb_queue_head_init(&reclaimed_skbs); 1947 1948 /* 1949 * Release all TFDs before the SSN, i.e. all TFDs in front of 1950 * block-ack window (we assume that they've been successfully 1951 * transmitted ... if not, it's too late anyway). 1952 */ 1953 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1954 1955 skb_queue_walk(&reclaimed_skbs, skb) { 1956 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1957 1958 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1959 1960 memset(&info->status, 0, sizeof(info->status)); 1961 /* Packet was transmitted successfully, failures come as single 1962 * frames because before failing a frame the firmware transmits 1963 * it without aggregation at least once. 1964 */ 1965 if (!is_flush) 1966 info->flags |= IEEE80211_TX_STAT_ACK; 1967 } 1968 1969 /* 1970 * It's possible to get a BA response after invalidating the rcu (rcu is 1971 * invalidated in order to prevent new Tx from being sent, but there may 1972 * be some frames already in-flight). 1973 * In this case we just want to reclaim, and could skip all the 1974 * sta-dependent stuff since it's in the middle of being removed 1975 * anyways. 1976 */ 1977 if (IS_ERR(sta)) 1978 goto out; 1979 1980 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1981 tid_data = &mvmsta->tid_data[tid]; 1982 1983 if (tid_data->txq_id != txq) { 1984 IWL_ERR(mvm, 1985 "invalid reclaim request: Q %d, tid %d\n", 1986 tid_data->txq_id, tid); 1987 rcu_read_unlock(); 1988 return; 1989 } 1990 1991 spin_lock_bh(&mvmsta->lock); 1992 1993 tid_data->next_reclaimed = index; 1994 1995 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1996 1997 freed = 0; 1998 1999 /* pack lq color from tid_data along the reduced txp */ 2000 tx_info->status.status_driver_data[0] = 2001 RS_DRV_DATA_PACK(tid_data->lq_color, 2002 tx_info->status.status_driver_data[0]); 2003 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 2004 2005 skb_queue_walk(&reclaimed_skbs, skb) { 2006 struct ieee80211_hdr *hdr = (void *)skb->data; 2007 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2008 2009 if (!is_flush) { 2010 if (ieee80211_is_data_qos(hdr->frame_control)) 2011 freed++; 2012 else 2013 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 2014 } 2015 2016 /* this is the first skb we deliver in this batch */ 2017 /* put the rate scaling data there */ 2018 if (freed == 1) { 2019 info->flags |= IEEE80211_TX_STAT_AMPDU; 2020 memcpy(&info->status, &tx_info->status, 2021 sizeof(tx_info->status)); 2022 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info); 2023 } 2024 } 2025 2026 spin_unlock_bh(&mvmsta->lock); 2027 2028 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 2029 * possible (i.e. first MPDU in the aggregation wasn't acked) 2030 * Still it's important to update RS about sent vs. acked. 2031 */ 2032 if (!is_flush && skb_queue_empty(&reclaimed_skbs) && 2033 !iwl_mvm_has_tlc_offload(mvm)) { 2034 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 2035 2036 /* no TLC offload, so non-MLD mode */ 2037 if (mvmsta->vif) 2038 chanctx_conf = 2039 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf); 2040 2041 if (WARN_ON_ONCE(!chanctx_conf)) 2042 goto out; 2043 2044 tx_info->band = chanctx_conf->def.chan->band; 2045 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info); 2046 2047 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 2048 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 2049 } 2050 2051 out: 2052 rcu_read_unlock(); 2053 2054 while (!skb_queue_empty(&reclaimed_skbs)) { 2055 skb = __skb_dequeue(&reclaimed_skbs); 2056 ieee80211_tx_status(mvm->hw, skb); 2057 } 2058 } 2059 2060 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2061 { 2062 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2063 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 2064 int sta_id, tid, txq, index; 2065 struct ieee80211_tx_info ba_info = {}; 2066 struct iwl_mvm_ba_notif *ba_notif; 2067 struct iwl_mvm_tid_data *tid_data; 2068 struct iwl_mvm_sta *mvmsta; 2069 2070 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 2071 2072 if (iwl_mvm_has_new_tx_api(mvm)) { 2073 struct iwl_mvm_compressed_ba_notif *ba_res = 2074 (void *)pkt->data; 2075 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 2076 u16 tfd_cnt; 2077 int i; 2078 2079 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len, 2080 "short BA notification (%d)\n", pkt_len)) 2081 return; 2082 2083 sta_id = ba_res->sta_id; 2084 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 2085 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 2086 ba_info.status.tx_time = 2087 (u16)le32_to_cpu(ba_res->wireless_time); 2088 ba_info.status.status_driver_data[0] = 2089 (void *)(uintptr_t)ba_res->reduced_txp; 2090 2091 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 2092 if (!tfd_cnt) 2093 return; 2094 2095 if (IWL_FW_CHECK(mvm, 2096 struct_size(ba_res, tfd, tfd_cnt) > pkt_len, 2097 "short BA notification (tfds:%d, size:%d)\n", 2098 tfd_cnt, pkt_len)) 2099 return; 2100 2101 rcu_read_lock(); 2102 2103 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2104 /* 2105 * It's possible to get a BA response after invalidating the rcu 2106 * (rcu is invalidated in order to prevent new Tx from being 2107 * sent, but there may be some frames already in-flight). 2108 * In this case we just want to reclaim, and could skip all the 2109 * sta-dependent stuff since it's in the middle of being removed 2110 * anyways. 2111 */ 2112 2113 /* Free per TID */ 2114 for (i = 0; i < tfd_cnt; i++) { 2115 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 2116 &ba_res->tfd[i]; 2117 2118 tid = ba_tfd->tid; 2119 if (tid == IWL_MGMT_TID) 2120 tid = IWL_MAX_TID_COUNT; 2121 2122 if (mvmsta) 2123 mvmsta->tid_data[i].lq_color = lq_color; 2124 2125 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 2126 (int)(le16_to_cpu(ba_tfd->q_num)), 2127 le16_to_cpu(ba_tfd->tfd_index), 2128 &ba_info, 2129 le32_to_cpu(ba_res->tx_rate), false); 2130 } 2131 2132 if (mvmsta) 2133 iwl_mvm_tx_airtime(mvm, mvmsta, 2134 le32_to_cpu(ba_res->wireless_time)); 2135 rcu_read_unlock(); 2136 2137 IWL_DEBUG_TX_REPLY(mvm, 2138 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2139 sta_id, le32_to_cpu(ba_res->flags), 2140 le16_to_cpu(ba_res->txed), 2141 le16_to_cpu(ba_res->done)); 2142 return; 2143 } 2144 2145 ba_notif = (void *)pkt->data; 2146 sta_id = ba_notif->sta_id; 2147 tid = ba_notif->tid; 2148 /* "flow" corresponds to Tx queue */ 2149 txq = le16_to_cpu(ba_notif->scd_flow); 2150 /* "ssn" is start of block-ack Tx window, corresponds to index 2151 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2152 index = le16_to_cpu(ba_notif->scd_ssn); 2153 2154 rcu_read_lock(); 2155 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2156 if (IWL_FW_CHECK(mvm, !mvmsta, 2157 "invalid STA ID %d in BA notif\n", 2158 sta_id)) { 2159 rcu_read_unlock(); 2160 return; 2161 } 2162 2163 tid_data = &mvmsta->tid_data[tid]; 2164 2165 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2166 ba_info.status.ampdu_len = ba_notif->txed; 2167 ba_info.status.tx_time = tid_data->tx_time; 2168 ba_info.status.status_driver_data[0] = 2169 (void *)(uintptr_t)ba_notif->reduced_txp; 2170 2171 rcu_read_unlock(); 2172 2173 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2174 tid_data->rate_n_flags, false); 2175 2176 IWL_DEBUG_TX_REPLY(mvm, 2177 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2178 ba_notif->sta_addr, ba_notif->sta_id); 2179 2180 IWL_DEBUG_TX_REPLY(mvm, 2181 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2182 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2183 le64_to_cpu(ba_notif->bitmap), txq, index, 2184 ba_notif->txed, ba_notif->txed_2_done); 2185 2186 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2187 ba_notif->reduced_txp); 2188 } 2189 2190 /* 2191 * Note that there are transports that buffer frames before they reach 2192 * the firmware. This means that after flush_tx_path is called, the 2193 * queue might not be empty. The race-free way to handle this is to: 2194 * 1) set the station as draining 2195 * 2) flush the Tx path 2196 * 3) wait for the transport queues to be empty 2197 */ 2198 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2199 { 2200 int ret; 2201 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2202 .queues_ctl = cpu_to_le32(tfd_msk), 2203 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2204 }; 2205 2206 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2207 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2208 sizeof(flush_cmd), &flush_cmd); 2209 if (ret) 2210 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2211 return ret; 2212 } 2213 2214 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2215 { 2216 int ret; 2217 struct iwl_tx_path_flush_cmd_rsp *rsp; 2218 struct iwl_tx_path_flush_cmd flush_cmd = { 2219 .sta_id = cpu_to_le32(sta_id), 2220 .tid_mask = cpu_to_le16(tids), 2221 }; 2222 2223 struct iwl_host_cmd cmd = { 2224 .id = TXPATH_FLUSH, 2225 .len = { sizeof(flush_cmd), }, 2226 .data = { &flush_cmd, }, 2227 }; 2228 2229 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2230 2231 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2232 cmd.flags |= CMD_WANT_SKB; 2233 2234 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2235 sta_id, tids); 2236 2237 ret = iwl_mvm_send_cmd(mvm, &cmd); 2238 2239 if (ret) { 2240 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2241 return ret; 2242 } 2243 2244 if (cmd.flags & CMD_WANT_SKB) { 2245 int i; 2246 int num_flushed_queues; 2247 2248 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2249 ret = -EIO; 2250 goto free_rsp; 2251 } 2252 2253 rsp = (void *)cmd.resp_pkt->data; 2254 2255 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2256 "sta_id %d != rsp_sta_id %d", 2257 sta_id, le16_to_cpu(rsp->sta_id))) { 2258 ret = -EIO; 2259 goto free_rsp; 2260 } 2261 2262 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2263 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2264 "num_flushed_queues %d", num_flushed_queues)) { 2265 ret = -EIO; 2266 goto free_rsp; 2267 } 2268 2269 for (i = 0; i < num_flushed_queues; i++) { 2270 struct ieee80211_tx_info tx_info = {}; 2271 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2272 int tid = le16_to_cpu(queue_info->tid); 2273 int read_before = le16_to_cpu(queue_info->read_before_flush); 2274 int read_after = le16_to_cpu(queue_info->read_after_flush); 2275 int queue_num = le16_to_cpu(queue_info->queue_num); 2276 2277 if (tid == IWL_MGMT_TID) 2278 tid = IWL_MAX_TID_COUNT; 2279 2280 IWL_DEBUG_TX_QUEUES(mvm, 2281 "tid %d queue_id %d read-before %d read-after %d\n", 2282 tid, queue_num, read_before, read_after); 2283 2284 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2285 &tx_info, 0, true); 2286 } 2287 free_rsp: 2288 iwl_free_resp(&cmd); 2289 } 2290 return ret; 2291 } 2292 2293 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal) 2294 { 2295 u32 sta_id, tfd_queue_msk; 2296 2297 if (internal) { 2298 struct iwl_mvm_int_sta *int_sta = sta; 2299 2300 sta_id = int_sta->sta_id; 2301 tfd_queue_msk = int_sta->tfd_queue_msk; 2302 } else { 2303 struct iwl_mvm_sta *mvm_sta = sta; 2304 2305 sta_id = mvm_sta->deflink.sta_id; 2306 tfd_queue_msk = mvm_sta->tfd_queue_msk; 2307 } 2308 2309 if (iwl_mvm_has_new_tx_api(mvm)) 2310 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff); 2311 2312 return iwl_mvm_flush_tx_path(mvm, tfd_queue_msk); 2313 } 2314