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