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