1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2023 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH 6 */ 7 #include <linux/ieee80211.h> 8 #include <linux/etherdevice.h> 9 #include <linux/tcp.h> 10 #include <net/gso.h> 11 #include <net/ip.h> 12 #include <net/ipv6.h> 13 14 #include "iwl-trans.h" 15 #include "iwl-eeprom-parse.h" 16 #include "mvm.h" 17 #include "sta.h" 18 #include "time-sync.h" 19 20 static void 21 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 22 u16 tid, u16 ssn) 23 { 24 struct iwl_fw_dbg_trigger_tlv *trig; 25 struct iwl_fw_dbg_trigger_ba *ba_trig; 26 27 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA); 28 if (!trig) 29 return; 30 31 ba_trig = (void *)trig->data; 32 33 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 34 return; 35 36 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 37 "BAR sent to %pM, tid %d, ssn %d", 38 addr, tid, ssn); 39 } 40 41 #define OPT_HDR(type, skb, off) \ 42 (type *)(skb_network_header(skb) + (off)) 43 44 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 45 struct ieee80211_tx_info *info, 46 bool amsdu) 47 { 48 struct ieee80211_hdr *hdr = (void *)skb->data; 49 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 50 u16 offload_assist = 0; 51 #if IS_ENABLED(CONFIG_INET) 52 u8 protocol = 0; 53 54 /* Do not compute checksum if already computed */ 55 if (skb->ip_summed != CHECKSUM_PARTIAL) 56 goto out; 57 58 /* We do not expect to be requested to csum stuff we do not support */ 59 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 60 (skb->protocol != htons(ETH_P_IP) && 61 skb->protocol != htons(ETH_P_IPV6)), 62 "No support for requested checksum\n")) { 63 skb_checksum_help(skb); 64 goto out; 65 } 66 67 if (skb->protocol == htons(ETH_P_IP)) { 68 protocol = ip_hdr(skb)->protocol; 69 } else { 70 #if IS_ENABLED(CONFIG_IPV6) 71 struct ipv6hdr *ipv6h = 72 (struct ipv6hdr *)skb_network_header(skb); 73 unsigned int off = sizeof(*ipv6h); 74 75 protocol = ipv6h->nexthdr; 76 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 77 struct ipv6_opt_hdr *hp; 78 79 /* only supported extension headers */ 80 if (protocol != NEXTHDR_ROUTING && 81 protocol != NEXTHDR_HOP && 82 protocol != NEXTHDR_DEST) { 83 skb_checksum_help(skb); 84 goto out; 85 } 86 87 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 88 protocol = hp->nexthdr; 89 off += ipv6_optlen(hp); 90 } 91 /* if we get here - protocol now should be TCP/UDP */ 92 #endif 93 } 94 95 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 96 WARN_ON_ONCE(1); 97 skb_checksum_help(skb); 98 goto out; 99 } 100 101 /* enable L4 csum */ 102 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 103 104 /* 105 * Set offset to IP header (snap). 106 * We don't support tunneling so no need to take care of inner header. 107 * Size is in words. 108 */ 109 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 110 111 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 112 if (skb->protocol == htons(ETH_P_IP) && amsdu) { 113 ip_hdr(skb)->check = 0; 114 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 115 } 116 117 /* reset UDP/TCP header csum */ 118 if (protocol == IPPROTO_TCP) 119 tcp_hdr(skb)->check = 0; 120 else 121 udp_hdr(skb)->check = 0; 122 123 out: 124 #endif 125 /* 126 * mac header len should include IV, size is in words unless 127 * the IV is added by the firmware like in WEP. 128 * In new Tx API, the IV is always added by the firmware. 129 */ 130 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 131 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 132 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 133 mh_len += info->control.hw_key->iv_len; 134 mh_len /= 2; 135 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 136 137 if (amsdu) 138 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 139 else if (ieee80211_hdrlen(hdr->frame_control) % 4) 140 /* padding is inserted later in transport */ 141 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 142 143 return offload_assist; 144 } 145 146 /* 147 * Sets most of the Tx cmd's fields 148 */ 149 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 150 struct iwl_tx_cmd *tx_cmd, 151 struct ieee80211_tx_info *info, u8 sta_id) 152 { 153 struct ieee80211_hdr *hdr = (void *)skb->data; 154 __le16 fc = hdr->frame_control; 155 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 156 u32 len = skb->len + FCS_LEN; 157 bool amsdu = false; 158 u8 ac; 159 160 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) || 161 (ieee80211_is_probe_resp(fc) && 162 !is_multicast_ether_addr(hdr->addr1))) 163 tx_flags |= TX_CMD_FLG_ACK; 164 else 165 tx_flags &= ~TX_CMD_FLG_ACK; 166 167 if (ieee80211_is_probe_resp(fc)) 168 tx_flags |= TX_CMD_FLG_TSF; 169 170 if (ieee80211_has_morefrags(fc)) 171 tx_flags |= TX_CMD_FLG_MORE_FRAG; 172 173 if (ieee80211_is_data_qos(fc)) { 174 u8 *qc = ieee80211_get_qos_ctl(hdr); 175 tx_cmd->tid_tspec = qc[0] & 0xf; 176 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 177 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 178 } else if (ieee80211_is_back_req(fc)) { 179 struct ieee80211_bar *bar = (void *)skb->data; 180 u16 control = le16_to_cpu(bar->control); 181 u16 ssn = le16_to_cpu(bar->start_seq_num); 182 183 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 184 tx_cmd->tid_tspec = (control & 185 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 186 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 187 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 188 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 189 ssn); 190 } else { 191 if (ieee80211_is_data(fc)) 192 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 193 else 194 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT; 195 196 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 197 tx_flags |= TX_CMD_FLG_SEQ_CTL; 198 else 199 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 200 } 201 202 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */ 203 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 204 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 205 else 206 ac = tid_to_mac80211_ac[0]; 207 208 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 209 TX_CMD_FLG_BT_PRIO_POS; 210 211 if (ieee80211_is_mgmt(fc)) { 212 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 213 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 214 else if (ieee80211_is_action(fc)) 215 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 216 else 217 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 218 219 /* The spec allows Action frames in A-MPDU, we don't support 220 * it 221 */ 222 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 223 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 224 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 225 } else { 226 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 227 } 228 229 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 230 !is_multicast_ether_addr(hdr->addr1)) 231 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 232 233 if (fw_has_capa(&mvm->fw->ucode_capa, 234 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 235 ieee80211_action_contains_tpc(skb)) 236 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 237 238 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 239 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 240 tx_cmd->len = cpu_to_le16((u16)skb->len); 241 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 242 tx_cmd->sta_id = sta_id; 243 244 tx_cmd->offload_assist = 245 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu)); 246 } 247 248 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, 249 struct ieee80211_tx_info *info, 250 struct ieee80211_sta *sta, __le16 fc) 251 { 252 if (info->band == NL80211_BAND_2GHZ && 253 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 254 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 255 256 if (sta && ieee80211_is_data(fc)) { 257 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 258 259 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS; 260 } 261 262 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 263 } 264 265 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm, 266 struct ieee80211_tx_info *info) 267 { 268 struct ieee80211_tx_rate *rate = &info->control.rates[0]; 269 u32 result; 270 271 /* 272 * we only care about legacy/HT/VHT so far, so we can 273 * build in v1 and use iwl_new_rate_from_v1() 274 */ 275 276 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { 277 u8 mcs = ieee80211_rate_get_vht_mcs(rate); 278 u8 nss = ieee80211_rate_get_vht_nss(rate); 279 280 result = RATE_MCS_VHT_MSK_V1; 281 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK); 282 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK); 283 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 284 result |= RATE_MCS_SGI_MSK_V1; 285 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 286 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 287 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 288 result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1); 289 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 290 result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1); 291 } else if (rate->flags & IEEE80211_TX_RC_MCS) { 292 result = RATE_MCS_HT_MSK_V1; 293 result |= u32_encode_bits(rate->idx, 294 RATE_HT_MCS_RATE_CODE_MSK_V1 | 295 RATE_HT_MCS_NSS_MSK_V1); 296 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 297 result |= RATE_MCS_SGI_MSK_V1; 298 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 299 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 300 if (info->flags & IEEE80211_TX_CTL_LDPC) 301 result |= RATE_MCS_LDPC_MSK_V1; 302 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC)) 303 result |= RATE_MCS_STBC_MSK; 304 } else { 305 return 0; 306 } 307 308 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6) 309 return iwl_new_rate_from_v1(result); 310 return result; 311 } 312 313 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 314 struct ieee80211_tx_info *info, 315 struct ieee80211_sta *sta, __le16 fc) 316 { 317 int rate_idx = -1; 318 u8 rate_plcp; 319 u32 rate_flags = 0; 320 bool is_cck; 321 322 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) { 323 u32 result = iwl_mvm_get_inject_tx_rate(mvm, info); 324 325 if (result) 326 return result; 327 rate_idx = info->control.rates[0].idx; 328 } else if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { 329 /* info->control is only relevant for non HW rate control */ 330 331 /* HT rate doesn't make sense for a non data frame */ 332 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && 333 !ieee80211_is_data(fc), 334 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", 335 info->control.rates[0].flags, 336 info->control.rates[0].idx, 337 le16_to_cpu(fc), 338 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 339 340 rate_idx = info->control.rates[0].idx; 341 342 /* For non 2 GHZ band, remap mac80211 rate indices into driver 343 * indices. 344 */ 345 if (info->band != NL80211_BAND_2GHZ || 346 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE)) 347 rate_idx += IWL_FIRST_OFDM_RATE; 348 349 /* For 2.4 GHZ band, check that there is no need to remap */ 350 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 351 } 352 353 /* if the rate isn't a well known legacy rate, take the lowest one */ 354 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 355 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm, 356 info, 357 info->control.vif); 358 359 /* Get PLCP rate for tx_cmd->rate_n_flags */ 360 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx); 361 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE); 362 363 /* Set CCK or OFDM flag */ 364 if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) { 365 if (!is_cck) 366 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK; 367 else 368 rate_flags |= RATE_MCS_CCK_MSK; 369 } else if (is_cck) { 370 rate_flags |= RATE_MCS_CCK_MSK_V1; 371 } 372 373 return (u32)rate_plcp | rate_flags; 374 } 375 376 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 377 struct ieee80211_tx_info *info, 378 struct ieee80211_sta *sta, __le16 fc) 379 { 380 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) | 381 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 382 } 383 384 /* 385 * Sets the fields in the Tx cmd that are rate related 386 */ 387 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 388 struct ieee80211_tx_info *info, 389 struct ieee80211_sta *sta, __le16 fc) 390 { 391 /* Set retry limit on RTS packets */ 392 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 393 394 /* Set retry limit on DATA packets and Probe Responses*/ 395 if (ieee80211_is_probe_resp(fc)) { 396 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 397 tx_cmd->rts_retry_limit = 398 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 399 } else if (ieee80211_is_back_req(fc)) { 400 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 401 } else { 402 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 403 } 404 405 /* 406 * for data packets, rate info comes from the table inside the fw. This 407 * table is controlled by LINK_QUALITY commands 408 */ 409 410 if (likely(ieee80211_is_data(fc) && sta && 411 !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) { 412 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 413 414 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 415 tx_cmd->initial_rate_index = 0; 416 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 417 return; 418 } 419 } else if (ieee80211_is_back_req(fc)) { 420 tx_cmd->tx_flags |= 421 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 422 } 423 424 /* Set the rate in the TX cmd */ 425 tx_cmd->rate_n_flags = 426 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 427 } 428 429 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 430 u8 *crypto_hdr) 431 { 432 struct ieee80211_key_conf *keyconf = info->control.hw_key; 433 u64 pn; 434 435 pn = atomic64_inc_return(&keyconf->tx_pn); 436 crypto_hdr[0] = pn; 437 crypto_hdr[2] = 0; 438 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 439 crypto_hdr[1] = pn >> 8; 440 crypto_hdr[4] = pn >> 16; 441 crypto_hdr[5] = pn >> 24; 442 crypto_hdr[6] = pn >> 32; 443 crypto_hdr[7] = pn >> 40; 444 } 445 446 /* 447 * Sets the fields in the Tx cmd that are crypto related 448 */ 449 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 450 struct ieee80211_tx_info *info, 451 struct iwl_tx_cmd *tx_cmd, 452 struct sk_buff *skb_frag, 453 int hdrlen) 454 { 455 struct ieee80211_key_conf *keyconf = info->control.hw_key; 456 u8 *crypto_hdr = skb_frag->data + hdrlen; 457 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 458 u64 pn; 459 460 switch (keyconf->cipher) { 461 case WLAN_CIPHER_SUITE_CCMP: 462 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 463 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 464 break; 465 466 case WLAN_CIPHER_SUITE_TKIP: 467 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 468 pn = atomic64_inc_return(&keyconf->tx_pn); 469 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 470 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 471 break; 472 473 case WLAN_CIPHER_SUITE_WEP104: 474 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 475 fallthrough; 476 case WLAN_CIPHER_SUITE_WEP40: 477 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 478 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 479 TX_CMD_SEC_WEP_KEY_IDX_MSK); 480 481 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 482 break; 483 case WLAN_CIPHER_SUITE_GCMP: 484 case WLAN_CIPHER_SUITE_GCMP_256: 485 type = TX_CMD_SEC_GCMP; 486 fallthrough; 487 case WLAN_CIPHER_SUITE_CCMP_256: 488 /* TODO: Taking the key from the table might introduce a race 489 * when PTK rekeying is done, having an old packets with a PN 490 * based on the old key but the message encrypted with a new 491 * one. 492 * Need to handle this. 493 */ 494 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 495 tx_cmd->key[0] = keyconf->hw_key_idx; 496 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 497 break; 498 default: 499 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 500 } 501 } 502 503 /* 504 * Allocates and sets the Tx cmd the driver data pointers in the skb 505 */ 506 static struct iwl_device_tx_cmd * 507 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 508 struct ieee80211_tx_info *info, int hdrlen, 509 struct ieee80211_sta *sta, u8 sta_id) 510 { 511 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 512 struct iwl_device_tx_cmd *dev_cmd; 513 struct iwl_tx_cmd *tx_cmd; 514 515 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 516 517 if (unlikely(!dev_cmd)) 518 return NULL; 519 520 dev_cmd->hdr.cmd = TX_CMD; 521 522 if (iwl_mvm_has_new_tx_api(mvm)) { 523 u32 rate_n_flags = 0; 524 u16 flags = 0; 525 struct iwl_mvm_sta *mvmsta = sta ? 526 iwl_mvm_sta_from_mac80211(sta) : NULL; 527 bool amsdu = false; 528 529 if (ieee80211_is_data_qos(hdr->frame_control)) { 530 u8 *qc = ieee80211_get_qos_ctl(hdr); 531 532 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 533 } 534 535 if (!info->control.hw_key) 536 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 537 538 /* 539 * For data and mgmt packets rate info comes from the fw. Only 540 * set rate/antenna for injected frames with fixed rate, or 541 * when no sta is given. 542 */ 543 if (unlikely(!sta || 544 info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) { 545 flags |= IWL_TX_FLAGS_CMD_RATE; 546 rate_n_flags = 547 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 548 hdr->frame_control); 549 } else if (!ieee80211_is_data(hdr->frame_control) || 550 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 551 /* These are important frames */ 552 flags |= IWL_TX_FLAGS_HIGH_PRI; 553 } 554 555 if (mvm->trans->trans_cfg->device_family >= 556 IWL_DEVICE_FAMILY_AX210) { 557 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 558 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, 559 info, amsdu); 560 561 cmd->offload_assist = cpu_to_le32(offload_assist); 562 563 /* Total # bytes to be transmitted */ 564 cmd->len = cpu_to_le16((u16)skb->len); 565 566 /* Copy MAC header from skb into command buffer */ 567 memcpy(cmd->hdr, hdr, hdrlen); 568 569 cmd->flags = cpu_to_le16(flags); 570 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 571 } else { 572 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 573 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb, 574 info, amsdu); 575 576 cmd->offload_assist = cpu_to_le16(offload_assist); 577 578 /* Total # bytes to be transmitted */ 579 cmd->len = cpu_to_le16((u16)skb->len); 580 581 /* Copy MAC header from skb into command buffer */ 582 memcpy(cmd->hdr, hdr, hdrlen); 583 584 cmd->flags = cpu_to_le32(flags); 585 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 586 } 587 goto out; 588 } 589 590 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 591 592 if (info->control.hw_key) 593 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 594 595 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 596 597 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 598 599 /* Copy MAC header from skb into command buffer */ 600 memcpy(tx_cmd->hdr, hdr, hdrlen); 601 602 out: 603 return dev_cmd; 604 } 605 606 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 607 struct iwl_device_tx_cmd *cmd) 608 { 609 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 610 611 memset(&skb_info->status, 0, sizeof(skb_info->status)); 612 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 613 614 skb_info->driver_data[1] = cmd; 615 } 616 617 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 618 struct iwl_mvm_vif_link_info *link, 619 struct ieee80211_tx_info *info, 620 struct sk_buff *skb) 621 { 622 struct ieee80211_hdr *hdr = (void *)skb->data; 623 __le16 fc = hdr->frame_control; 624 625 switch (info->control.vif->type) { 626 case NL80211_IFTYPE_AP: 627 case NL80211_IFTYPE_ADHOC: 628 /* 629 * Non-bufferable frames use the broadcast station, thus they 630 * use the probe queue. 631 * Also take care of the case where we send a deauth to a 632 * station that we don't have, or similarly an association 633 * response (with non-success status) for a station we can't 634 * accept. 635 * Also, disassociate frames might happen, particular with 636 * reason 7 ("Class 3 frame received from nonassociated STA"). 637 */ 638 if (ieee80211_is_mgmt(fc) && 639 (!ieee80211_is_bufferable_mmpdu(skb) || 640 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 641 return link->mgmt_queue; 642 643 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 644 is_multicast_ether_addr(hdr->addr1)) 645 return link->cab_queue; 646 647 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 648 "fc=0x%02x", le16_to_cpu(fc)); 649 return link->mgmt_queue; 650 case NL80211_IFTYPE_P2P_DEVICE: 651 if (ieee80211_is_mgmt(fc)) 652 return mvm->p2p_dev_queue; 653 654 WARN_ON_ONCE(1); 655 return mvm->p2p_dev_queue; 656 default: 657 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 658 return -1; 659 } 660 } 661 662 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 663 struct sk_buff *skb) 664 { 665 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 666 struct iwl_mvm_vif *mvmvif = 667 iwl_mvm_vif_from_mac80211(info->control.vif); 668 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 669 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 670 struct iwl_probe_resp_data *resp_data; 671 const u8 *ie; 672 u8 *pos; 673 u8 match[] = { 674 (WLAN_OUI_WFA >> 16) & 0xff, 675 (WLAN_OUI_WFA >> 8) & 0xff, 676 WLAN_OUI_WFA & 0xff, 677 WLAN_OUI_TYPE_WFA_P2P, 678 }; 679 680 rcu_read_lock(); 681 682 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data); 683 if (!resp_data) 684 goto out; 685 686 if (!resp_data->notif.noa_active) 687 goto out; 688 689 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 690 mgmt->u.probe_resp.variable, 691 skb->len - base_len, 692 match, 4, 2); 693 if (!ie) { 694 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 695 goto out; 696 } 697 698 if (skb_tailroom(skb) < resp_data->noa_len) { 699 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 700 IWL_ERR(mvm, 701 "Failed to reallocate probe resp\n"); 702 goto out; 703 } 704 } 705 706 pos = skb_put(skb, resp_data->noa_len); 707 708 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 709 /* Set length of IE body (not including ID and length itself) */ 710 *pos++ = resp_data->noa_len - 2; 711 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 712 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 713 *pos++ = WLAN_OUI_WFA & 0xff; 714 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 715 716 memcpy(pos, &resp_data->notif.noa_attr, 717 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 718 719 out: 720 rcu_read_unlock(); 721 } 722 723 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 724 { 725 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 726 struct ieee80211_tx_info info; 727 struct iwl_device_tx_cmd *dev_cmd; 728 u8 sta_id; 729 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 730 __le16 fc = hdr->frame_control; 731 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 732 IEEE80211_TX_CTL_TX_OFFCHAN; 733 int queue = -1; 734 735 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 736 return -1; 737 738 memcpy(&info, skb->cb, sizeof(info)); 739 740 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 741 return -1; 742 743 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 744 return -1; 745 746 if (info.control.vif) { 747 struct iwl_mvm_vif *mvmvif = 748 iwl_mvm_vif_from_mac80211(info.control.vif); 749 750 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 751 info.control.vif->type == NL80211_IFTYPE_AP || 752 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 753 u32 link_id = u32_get_bits(info.control.flags, 754 IEEE80211_TX_CTRL_MLO_LINK); 755 struct iwl_mvm_vif_link_info *link; 756 757 if (link_id == IEEE80211_LINK_UNSPECIFIED) { 758 if (info.control.vif->active_links) 759 link_id = ffs(info.control.vif->active_links) - 1; 760 else 761 link_id = 0; 762 } 763 764 link = mvmvif->link[link_id]; 765 if (WARN_ON(!link)) 766 return -1; 767 768 if (!ieee80211_is_data(hdr->frame_control)) 769 sta_id = link->bcast_sta.sta_id; 770 else 771 sta_id = link->mcast_sta.sta_id; 772 773 queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info, 774 skb); 775 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 776 queue = mvm->snif_queue; 777 sta_id = mvm->snif_sta.sta_id; 778 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 779 offchannel) { 780 /* 781 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 782 * that can be used in 2 different types of vifs, P2P & 783 * STATION. 784 * P2P uses the offchannel queue. 785 * STATION (HS2.0) uses the auxiliary context of the FW, 786 * and hence needs to be sent on the aux queue. 787 */ 788 sta_id = mvm->aux_sta.sta_id; 789 queue = mvm->aux_queue; 790 } 791 } 792 793 if (queue < 0) { 794 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 795 return -1; 796 } 797 798 if (unlikely(ieee80211_is_probe_resp(fc))) 799 iwl_mvm_probe_resp_set_noa(mvm, skb); 800 801 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 802 803 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 804 if (!dev_cmd) 805 return -1; 806 807 /* From now on, we cannot access info->control */ 808 iwl_mvm_skb_prepare_status(skb, dev_cmd); 809 810 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 811 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 812 return -1; 813 } 814 815 return 0; 816 } 817 818 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 819 struct ieee80211_sta *sta, unsigned int tid) 820 { 821 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 822 u8 ac = tid_to_mac80211_ac[tid]; 823 enum nl80211_band band; 824 unsigned int txf; 825 unsigned int val; 826 int lmac; 827 828 /* For HE redirect to trigger based fifos */ 829 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 830 ac += 4; 831 832 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 833 834 /* 835 * Don't send an AMSDU that will be longer than the TXF. 836 * Add a security margin of 256 for the TX command + headers. 837 * We also want to have the start of the next packet inside the 838 * fifo to be able to send bursts. 839 */ 840 val = mvmsta->max_amsdu_len; 841 842 if (hweight16(sta->valid_links) <= 1) { 843 if (sta->valid_links) { 844 struct ieee80211_bss_conf *link_conf; 845 unsigned int link = ffs(sta->valid_links) - 1; 846 847 rcu_read_lock(); 848 link_conf = rcu_dereference(mvmsta->vif->link_conf[link]); 849 if (WARN_ON(!link_conf)) 850 band = NL80211_BAND_2GHZ; 851 else 852 band = link_conf->chandef.chan->band; 853 rcu_read_unlock(); 854 } else { 855 band = mvmsta->vif->bss_conf.chandef.chan->band; 856 } 857 858 lmac = iwl_mvm_get_lmac_id(mvm, band); 859 } else if (fw_has_capa(&mvm->fw->ucode_capa, 860 IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) { 861 /* for real MLO restrict to both LMACs if they exist */ 862 lmac = IWL_LMAC_5G_INDEX; 863 val = min_t(unsigned int, val, 864 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 865 lmac = IWL_LMAC_24G_INDEX; 866 } else { 867 lmac = IWL_LMAC_24G_INDEX; 868 } 869 870 return min_t(unsigned int, val, 871 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 872 } 873 874 #ifdef CONFIG_INET 875 876 static int 877 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 878 netdev_features_t netdev_flags, 879 struct sk_buff_head *mpdus_skb) 880 { 881 struct sk_buff *tmp, *next; 882 struct ieee80211_hdr *hdr = (void *)skb->data; 883 char cb[sizeof(skb->cb)]; 884 u16 i = 0; 885 unsigned int tcp_payload_len; 886 unsigned int mss = skb_shinfo(skb)->gso_size; 887 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 888 bool qos = ieee80211_is_data_qos(hdr->frame_control); 889 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 890 891 skb_shinfo(skb)->gso_size = num_subframes * mss; 892 memcpy(cb, skb->cb, sizeof(cb)); 893 894 next = skb_gso_segment(skb, netdev_flags); 895 skb_shinfo(skb)->gso_size = mss; 896 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 897 if (WARN_ON_ONCE(IS_ERR(next))) 898 return -EINVAL; 899 else if (next) 900 consume_skb(skb); 901 902 skb_list_walk_safe(next, tmp, next) { 903 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 904 /* 905 * Compute the length of all the data added for the A-MSDU. 906 * This will be used to compute the length to write in the TX 907 * command. We have: SNAP + IP + TCP for n -1 subframes and 908 * ETH header for n subframes. 909 */ 910 tcp_payload_len = skb_tail_pointer(tmp) - 911 skb_transport_header(tmp) - 912 tcp_hdrlen(tmp) + tmp->data_len; 913 914 if (ipv4) 915 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 916 917 if (tcp_payload_len > mss) { 918 skb_shinfo(tmp)->gso_size = mss; 919 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 : 920 SKB_GSO_TCPV6; 921 } else { 922 if (qos) { 923 u8 *qc; 924 925 if (ipv4) 926 ip_send_check(ip_hdr(tmp)); 927 928 qc = ieee80211_get_qos_ctl((void *)tmp->data); 929 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 930 } 931 skb_shinfo(tmp)->gso_size = 0; 932 } 933 934 skb_mark_not_on_list(tmp); 935 __skb_queue_tail(mpdus_skb, tmp); 936 i++; 937 } 938 939 return 0; 940 } 941 942 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 943 struct ieee80211_tx_info *info, 944 struct ieee80211_sta *sta, 945 struct sk_buff_head *mpdus_skb) 946 { 947 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 948 struct ieee80211_hdr *hdr = (void *)skb->data; 949 unsigned int mss = skb_shinfo(skb)->gso_size; 950 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 951 u16 snap_ip_tcp, pad; 952 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 953 u8 tid; 954 955 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 956 tcp_hdrlen(skb); 957 958 if (!mvmsta->max_amsdu_len || 959 !ieee80211_is_data_qos(hdr->frame_control) || 960 !mvmsta->amsdu_enabled) 961 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 962 963 /* 964 * Do not build AMSDU for IPv6 with extension headers. 965 * ask stack to segment and checkum the generated MPDUs for us. 966 */ 967 if (skb->protocol == htons(ETH_P_IPV6) && 968 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 969 IPPROTO_TCP) { 970 netdev_flags &= ~NETIF_F_CSUM_MASK; 971 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 972 } 973 974 tid = ieee80211_get_tid(hdr); 975 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 976 return -EINVAL; 977 978 /* 979 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 980 * during an BA session. 981 */ 982 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 983 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 984 !(mvmsta->amsdu_enabled & BIT(tid))) 985 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 986 987 /* 988 * Take the min of ieee80211 station and mvm station 989 */ 990 max_amsdu_len = 991 min_t(unsigned int, sta->cur->max_amsdu_len, 992 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 993 994 /* 995 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 996 * supported. This is a spec requirement (IEEE 802.11-2015 997 * section 8.7.3 NOTE 3). 998 */ 999 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1000 !sta->deflink.vht_cap.vht_supported) 1001 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 1002 1003 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 1004 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 1005 pad = (4 - subf_len) & 0x3; 1006 1007 /* 1008 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 1009 * N * subf_len + (N - 1) * pad. 1010 */ 1011 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 1012 1013 if (sta->max_amsdu_subframes && 1014 num_subframes > sta->max_amsdu_subframes) 1015 num_subframes = sta->max_amsdu_subframes; 1016 1017 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1018 tcp_hdrlen(skb) + skb->data_len; 1019 1020 /* 1021 * Make sure we have enough TBs for the A-MSDU: 1022 * 2 for each subframe 1023 * 1 more for each fragment 1024 * 1 more for the potential data in the header 1025 */ 1026 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 1027 mvm->trans->max_skb_frags) 1028 num_subframes = 1; 1029 1030 if (num_subframes > 1) 1031 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1032 1033 /* This skb fits in one single A-MSDU */ 1034 if (num_subframes * mss >= tcp_payload_len) { 1035 __skb_queue_tail(mpdus_skb, skb); 1036 return 0; 1037 } 1038 1039 /* 1040 * Trick the segmentation function to make it 1041 * create SKBs that can fit into one A-MSDU. 1042 */ 1043 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 1044 mpdus_skb); 1045 } 1046 #else /* CONFIG_INET */ 1047 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 1048 struct ieee80211_tx_info *info, 1049 struct ieee80211_sta *sta, 1050 struct sk_buff_head *mpdus_skb) 1051 { 1052 /* Impossible to get TSO with CONFIG_INET */ 1053 WARN_ON(1); 1054 1055 return -1; 1056 } 1057 #endif 1058 1059 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1060 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1061 { 1062 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1063 unsigned long now = jiffies; 1064 int tid; 1065 1066 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1067 return false; 1068 1069 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1070 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1071 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1072 return true; 1073 } 1074 1075 return false; 1076 } 1077 1078 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1079 struct iwl_mvm_sta *mvmsta, 1080 int airtime) 1081 { 1082 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1083 struct iwl_mvm_tcm_mac *mdata; 1084 1085 if (mac >= NUM_MAC_INDEX_DRIVER) 1086 return; 1087 1088 mdata = &mvm->tcm.data[mac]; 1089 1090 if (mvm->tcm.paused) 1091 return; 1092 1093 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1094 schedule_delayed_work(&mvm->tcm.work, 0); 1095 1096 mdata->tx.airtime += airtime; 1097 } 1098 1099 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1100 struct iwl_mvm_sta *mvmsta, int tid) 1101 { 1102 u32 ac = tid_to_mac80211_ac[tid]; 1103 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1104 struct iwl_mvm_tcm_mac *mdata; 1105 1106 if (mac >= NUM_MAC_INDEX_DRIVER) 1107 return -EINVAL; 1108 1109 mdata = &mvm->tcm.data[mac]; 1110 1111 mdata->tx.pkts[ac]++; 1112 1113 return 0; 1114 } 1115 1116 /* 1117 * Sets the fields in the Tx cmd that are crypto related. 1118 * 1119 * This function must be called with BHs disabled. 1120 */ 1121 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1122 struct ieee80211_tx_info *info, 1123 struct ieee80211_sta *sta) 1124 { 1125 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1126 struct iwl_mvm_sta *mvmsta; 1127 struct iwl_device_tx_cmd *dev_cmd; 1128 __le16 fc; 1129 u16 seq_number = 0; 1130 u8 tid = IWL_MAX_TID_COUNT; 1131 u16 txq_id; 1132 bool is_ampdu = false; 1133 int hdrlen; 1134 1135 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1136 fc = hdr->frame_control; 1137 hdrlen = ieee80211_hdrlen(fc); 1138 1139 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1140 return -1; 1141 1142 if (WARN_ON_ONCE(!mvmsta)) 1143 return -1; 1144 1145 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1146 return -1; 1147 1148 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he) 1149 return -1; 1150 1151 if (unlikely(ieee80211_is_probe_resp(fc))) 1152 iwl_mvm_probe_resp_set_noa(mvm, skb); 1153 1154 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1155 sta, mvmsta->deflink.sta_id); 1156 if (!dev_cmd) 1157 goto drop; 1158 1159 /* 1160 * we handle that entirely ourselves -- for uAPSD the firmware 1161 * will always send a notification, and for PS-Poll responses 1162 * we'll notify mac80211 when getting frame status 1163 */ 1164 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1165 1166 spin_lock(&mvmsta->lock); 1167 1168 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1169 * the conditions of !ieee80211_is_qos_nullfunc(fc) and 1170 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID 1171 */ 1172 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1173 tid = ieee80211_get_tid(hdr); 1174 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1175 goto drop_unlock_sta; 1176 1177 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1178 if (WARN_ONCE(is_ampdu && 1179 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1180 "Invalid internal agg state %d for TID %d", 1181 mvmsta->tid_data[tid].state, tid)) 1182 goto drop_unlock_sta; 1183 1184 seq_number = mvmsta->tid_data[tid].seq_number; 1185 seq_number &= IEEE80211_SCTL_SEQ; 1186 1187 if (!iwl_mvm_has_new_tx_api(mvm)) { 1188 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1189 1190 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1191 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1192 /* update the tx_cmd hdr as it was already copied */ 1193 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1194 } 1195 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) && 1196 !ieee80211_is_nullfunc(fc)) { 1197 tid = IWL_TID_NON_QOS; 1198 } 1199 1200 txq_id = mvmsta->tid_data[tid].txq_id; 1201 1202 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1203 1204 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1205 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1206 spin_unlock(&mvmsta->lock); 1207 return -1; 1208 } 1209 1210 if (!iwl_mvm_has_new_tx_api(mvm)) { 1211 /* Keep track of the time of the last frame for this RA/TID */ 1212 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1213 1214 /* 1215 * If we have timed-out TIDs - schedule the worker that will 1216 * reconfig the queues and update them 1217 * 1218 * Note that the no lock is taken here in order to not serialize 1219 * the TX flow. This isn't dangerous because scheduling 1220 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1221 * schedule it due to some race condition then next TX we get 1222 * here we will. 1223 */ 1224 if (unlikely(mvm->queue_info[txq_id].status == 1225 IWL_MVM_QUEUE_SHARED && 1226 iwl_mvm_txq_should_update(mvm, txq_id))) 1227 schedule_work(&mvm->add_stream_wk); 1228 } 1229 1230 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1231 mvmsta->deflink.sta_id, tid, txq_id, 1232 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1233 1234 /* From now on, we cannot access info->control */ 1235 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1236 1237 /* 1238 * The IV is introduced by the HW for new tx api, and it is not present 1239 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the 1240 * IV for those devices. 1241 */ 1242 if (ieee80211_is_data(fc)) 1243 iwl_mvm_mei_tx_copy_to_csme(mvm, skb, 1244 info->control.hw_key && 1245 !iwl_mvm_has_new_tx_api(mvm) ? 1246 info->control.hw_key->iv_len : 0); 1247 1248 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1249 goto drop_unlock_sta; 1250 1251 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1252 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1253 1254 spin_unlock(&mvmsta->lock); 1255 1256 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1257 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1258 goto drop; 1259 1260 return 0; 1261 1262 drop_unlock_sta: 1263 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1264 spin_unlock(&mvmsta->lock); 1265 drop: 1266 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id, 1267 tid); 1268 return -1; 1269 } 1270 1271 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1272 struct ieee80211_sta *sta) 1273 { 1274 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1275 struct ieee80211_tx_info info; 1276 struct sk_buff_head mpdus_skbs; 1277 unsigned int payload_len; 1278 int ret; 1279 struct sk_buff *orig_skb = skb; 1280 1281 if (WARN_ON_ONCE(!mvmsta)) 1282 return -1; 1283 1284 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1285 return -1; 1286 1287 memcpy(&info, skb->cb, sizeof(info)); 1288 1289 if (!skb_is_gso(skb)) 1290 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1291 1292 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1293 tcp_hdrlen(skb) + skb->data_len; 1294 1295 if (payload_len <= skb_shinfo(skb)->gso_size) 1296 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1297 1298 __skb_queue_head_init(&mpdus_skbs); 1299 1300 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1301 if (ret) 1302 return ret; 1303 1304 WARN_ON(skb_queue_empty(&mpdus_skbs)); 1305 1306 while (!skb_queue_empty(&mpdus_skbs)) { 1307 skb = __skb_dequeue(&mpdus_skbs); 1308 1309 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1310 if (ret) { 1311 /* Free skbs created as part of TSO logic that have not yet been dequeued */ 1312 __skb_queue_purge(&mpdus_skbs); 1313 /* skb here is not necessarily same as skb that entered this method, 1314 * so free it explicitly. 1315 */ 1316 if (skb == orig_skb) 1317 ieee80211_free_txskb(mvm->hw, skb); 1318 else 1319 kfree_skb(skb); 1320 /* there was error, but we consumed skb one way or another, so return 0 */ 1321 return 0; 1322 } 1323 } 1324 1325 return 0; 1326 } 1327 1328 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1329 struct ieee80211_sta *sta, u8 tid) 1330 { 1331 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1332 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1333 struct ieee80211_vif *vif = mvmsta->vif; 1334 u16 normalized_ssn; 1335 1336 lockdep_assert_held(&mvmsta->lock); 1337 1338 if ((tid_data->state == IWL_AGG_ON || 1339 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1340 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1341 /* 1342 * Now that this aggregation or DQA queue is empty tell 1343 * mac80211 so it knows we no longer have frames buffered for 1344 * the station on this TID (for the TIM bitmap calculation.) 1345 */ 1346 ieee80211_sta_set_buffered(sta, tid, false); 1347 } 1348 1349 /* 1350 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1351 * to align the wrap around of ssn so we compare relevant values. 1352 */ 1353 normalized_ssn = tid_data->ssn; 1354 if (mvm->trans->trans_cfg->gen2) 1355 normalized_ssn &= 0xff; 1356 1357 if (normalized_ssn != tid_data->next_reclaimed) 1358 return; 1359 1360 switch (tid_data->state) { 1361 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1362 IWL_DEBUG_TX_QUEUES(mvm, 1363 "Can continue addBA flow ssn = next_recl = %d\n", 1364 tid_data->next_reclaimed); 1365 tid_data->state = IWL_AGG_STARTING; 1366 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1367 break; 1368 1369 case IWL_EMPTYING_HW_QUEUE_DELBA: 1370 IWL_DEBUG_TX_QUEUES(mvm, 1371 "Can continue DELBA flow ssn = next_recl = %d\n", 1372 tid_data->next_reclaimed); 1373 tid_data->state = IWL_AGG_OFF; 1374 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1375 break; 1376 1377 default: 1378 break; 1379 } 1380 } 1381 1382 #ifdef CONFIG_IWLWIFI_DEBUG 1383 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1384 { 1385 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1386 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1387 1388 switch (status & TX_STATUS_MSK) { 1389 case TX_STATUS_SUCCESS: 1390 return "SUCCESS"; 1391 TX_STATUS_POSTPONE(DELAY); 1392 TX_STATUS_POSTPONE(FEW_BYTES); 1393 TX_STATUS_POSTPONE(BT_PRIO); 1394 TX_STATUS_POSTPONE(QUIET_PERIOD); 1395 TX_STATUS_POSTPONE(CALC_TTAK); 1396 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1397 TX_STATUS_FAIL(SHORT_LIMIT); 1398 TX_STATUS_FAIL(LONG_LIMIT); 1399 TX_STATUS_FAIL(UNDERRUN); 1400 TX_STATUS_FAIL(DRAIN_FLOW); 1401 TX_STATUS_FAIL(RFKILL_FLUSH); 1402 TX_STATUS_FAIL(LIFE_EXPIRE); 1403 TX_STATUS_FAIL(DEST_PS); 1404 TX_STATUS_FAIL(HOST_ABORTED); 1405 TX_STATUS_FAIL(BT_RETRY); 1406 TX_STATUS_FAIL(STA_INVALID); 1407 TX_STATUS_FAIL(FRAG_DROPPED); 1408 TX_STATUS_FAIL(TID_DISABLE); 1409 TX_STATUS_FAIL(FIFO_FLUSHED); 1410 TX_STATUS_FAIL(SMALL_CF_POLL); 1411 TX_STATUS_FAIL(FW_DROP); 1412 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1413 } 1414 1415 return "UNKNOWN"; 1416 1417 #undef TX_STATUS_FAIL 1418 #undef TX_STATUS_POSTPONE 1419 } 1420 #endif /* CONFIG_IWLWIFI_DEBUG */ 1421 1422 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1423 { 1424 switch (chan_width) { 1425 case RATE_MCS_CHAN_WIDTH_20: 1426 return 0; 1427 case RATE_MCS_CHAN_WIDTH_40: 1428 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1429 case RATE_MCS_CHAN_WIDTH_80: 1430 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1431 case RATE_MCS_CHAN_WIDTH_160: 1432 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1433 default: 1434 return 0; 1435 } 1436 } 1437 1438 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1439 enum nl80211_band band, 1440 struct ieee80211_tx_rate *r) 1441 { 1442 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1443 u32 rate = format == RATE_MCS_HT_MSK ? 1444 RATE_HT_MCS_INDEX(rate_n_flags) : 1445 rate_n_flags & RATE_MCS_CODE_MSK; 1446 1447 r->flags |= 1448 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1449 RATE_MCS_CHAN_WIDTH_MSK); 1450 1451 if (rate_n_flags & RATE_MCS_SGI_MSK) 1452 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1453 if (format == RATE_MCS_HT_MSK) { 1454 r->flags |= IEEE80211_TX_RC_MCS; 1455 r->idx = rate; 1456 } else if (format == RATE_MCS_VHT_MSK) { 1457 ieee80211_rate_set_vht(r, rate, 1458 FIELD_GET(RATE_MCS_NSS_MSK, 1459 rate_n_flags) + 1); 1460 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1461 } else if (format == RATE_MCS_HE_MSK) { 1462 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1463 * but it only matters for radiotap */ 1464 r->idx = 0; 1465 } else { 1466 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1467 band); 1468 } 1469 } 1470 1471 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags, 1472 enum nl80211_band band, 1473 struct ieee80211_tx_rate *r) 1474 { 1475 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1476 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1477 1478 r->flags |= 1479 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1480 RATE_MCS_CHAN_WIDTH_MSK_V1); 1481 1482 if (rate_n_flags & RATE_MCS_SGI_MSK_V1) 1483 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1484 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 1485 r->flags |= IEEE80211_TX_RC_MCS; 1486 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 1487 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 1488 ieee80211_rate_set_vht( 1489 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1490 FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1); 1491 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1492 } else { 1493 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1494 band); 1495 } 1496 } 1497 1498 /* 1499 * translate ucode response to mac80211 tx status control values 1500 */ 1501 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw, 1502 u32 rate_n_flags, 1503 struct ieee80211_tx_info *info) 1504 { 1505 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1506 1507 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP, 1508 TX_CMD, 0) <= 6) 1509 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1510 1511 info->status.antenna = 1512 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1513 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, 1514 info->band, r); 1515 } 1516 1517 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1518 u32 status, __le16 frame_control) 1519 { 1520 struct iwl_fw_dbg_trigger_tlv *trig; 1521 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1522 int i; 1523 1524 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1525 enum iwl_fw_ini_time_point tp = 1526 IWL_FW_INI_TIME_POINT_TX_FAILED; 1527 1528 if (ieee80211_is_action(frame_control)) 1529 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1530 1531 iwl_dbg_tlv_time_point(&mvm->fwrt, 1532 tp, NULL); 1533 return; 1534 } 1535 1536 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1537 FW_DBG_TRIGGER_TX_STATUS); 1538 if (!trig) 1539 return; 1540 1541 status_trig = (void *)trig->data; 1542 1543 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1544 /* don't collect on status 0 */ 1545 if (!status_trig->statuses[i].status) 1546 break; 1547 1548 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1549 continue; 1550 1551 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1552 "Tx status %d was received", 1553 status & TX_STATUS_MSK); 1554 break; 1555 } 1556 } 1557 1558 /* 1559 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1560 * @tx_resp: the Tx response from the fw (agg or non-agg) 1561 * 1562 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1563 * it can't know that everything will go well until the end of the AMPDU, it 1564 * can't know in advance the number of MPDUs that will be sent in the current 1565 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1566 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1567 * of the batch. This is why the SSN of the SCD is written at the end of the 1568 * whole struct at a variable offset. This function knows how to cope with the 1569 * variable offset and returns the SSN of the SCD. 1570 */ 1571 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1572 struct iwl_mvm_tx_resp *tx_resp) 1573 { 1574 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1575 tx_resp->frame_count) & 0xfff; 1576 } 1577 1578 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1579 struct iwl_rx_packet *pkt) 1580 { 1581 struct ieee80211_sta *sta; 1582 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1583 int txq_id = SEQ_TO_QUEUE(sequence); 1584 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1585 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1586 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1587 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1588 struct agg_tx_status *agg_status = 1589 iwl_mvm_get_agg_status(mvm, tx_resp); 1590 u32 status = le16_to_cpu(agg_status->status); 1591 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1592 struct sk_buff_head skbs; 1593 u8 skb_freed = 0; 1594 u8 lq_color; 1595 u16 next_reclaimed, seq_ctl; 1596 bool is_ndp = false; 1597 1598 __skb_queue_head_init(&skbs); 1599 1600 if (iwl_mvm_has_new_tx_api(mvm)) 1601 txq_id = le16_to_cpu(tx_resp->tx_queue); 1602 1603 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1604 1605 /* we can free until ssn % q.n_bd not inclusive */ 1606 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false); 1607 1608 while (!skb_queue_empty(&skbs)) { 1609 struct sk_buff *skb = __skb_dequeue(&skbs); 1610 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1611 struct ieee80211_hdr *hdr = (void *)skb->data; 1612 bool flushed = false; 1613 1614 skb_freed++; 1615 1616 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1617 1618 memset(&info->status, 0, sizeof(info->status)); 1619 info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED); 1620 1621 /* inform mac80211 about what happened with the frame */ 1622 switch (status & TX_STATUS_MSK) { 1623 case TX_STATUS_SUCCESS: 1624 case TX_STATUS_DIRECT_DONE: 1625 info->flags |= IEEE80211_TX_STAT_ACK; 1626 break; 1627 case TX_STATUS_FAIL_FIFO_FLUSHED: 1628 case TX_STATUS_FAIL_DRAIN_FLOW: 1629 flushed = true; 1630 break; 1631 case TX_STATUS_FAIL_DEST_PS: 1632 /* the FW should have stopped the queue and not 1633 * return this status 1634 */ 1635 IWL_ERR_LIMIT(mvm, 1636 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1637 status, le16_to_cpu(hdr->frame_control)); 1638 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1639 break; 1640 default: 1641 break; 1642 } 1643 1644 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1645 ieee80211_is_mgmt(hdr->frame_control)) 1646 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1647 1648 /* 1649 * If we are freeing multiple frames, mark all the frames 1650 * but the first one as acked, since they were acknowledged 1651 * before 1652 * */ 1653 if (skb_freed > 1) 1654 info->flags |= IEEE80211_TX_STAT_ACK; 1655 1656 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1657 1658 info->status.rates[0].count = tx_resp->failure_frame + 1; 1659 1660 iwl_mvm_hwrate_to_tx_status(mvm->fw, 1661 le32_to_cpu(tx_resp->initial_rate), 1662 info); 1663 1664 /* Don't assign the converted initial_rate, because driver 1665 * TLC uses this and doesn't support the new FW rate 1666 */ 1667 info->status.status_driver_data[1] = 1668 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1669 1670 /* Single frame failure in an AMPDU queue => send BAR */ 1671 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1672 !(info->flags & IEEE80211_TX_STAT_ACK) && 1673 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1674 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1675 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1676 1677 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1678 if (ieee80211_is_back_req(hdr->frame_control)) 1679 seq_ctl = 0; 1680 else if (status != TX_STATUS_SUCCESS) 1681 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1682 1683 if (unlikely(!seq_ctl)) { 1684 /* 1685 * If it is an NDP, we can't update next_reclaim since 1686 * its sequence control is 0. Note that for that same 1687 * reason, NDPs are never sent to A-MPDU'able queues 1688 * so that we can never have more than one freed frame 1689 * for a single Tx resonse (see WARN_ON below). 1690 */ 1691 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1692 is_ndp = true; 1693 } 1694 1695 /* 1696 * TODO: this is not accurate if we are freeing more than one 1697 * packet. 1698 */ 1699 info->status.tx_time = 1700 le16_to_cpu(tx_resp->wireless_media_time); 1701 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1702 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1703 info->status.status_driver_data[0] = 1704 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1705 1706 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1))) 1707 ieee80211_tx_status(mvm->hw, skb); 1708 } 1709 1710 /* This is an aggregation queue or might become one, so we use 1711 * the ssn since: ssn = wifi seq_num % 256. 1712 * The seq_ctl is the sequence control of the packet to which 1713 * this Tx response relates. But if there is a hole in the 1714 * bitmap of the BA we received, this Tx response may allow to 1715 * reclaim the hole and all the subsequent packets that were 1716 * already acked. In that case, seq_ctl != ssn, and the next 1717 * packet to be reclaimed will be ssn and not seq_ctl. In that 1718 * case, several packets will be reclaimed even if 1719 * frame_count = 1. 1720 * 1721 * The ssn is the index (% 256) of the latest packet that has 1722 * treated (acked / dropped) + 1. 1723 */ 1724 next_reclaimed = ssn; 1725 1726 IWL_DEBUG_TX_REPLY(mvm, 1727 "TXQ %d status %s (0x%08x)\n", 1728 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1729 1730 IWL_DEBUG_TX_REPLY(mvm, 1731 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1732 le32_to_cpu(tx_resp->initial_rate), 1733 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1734 ssn, next_reclaimed, seq_ctl); 1735 1736 rcu_read_lock(); 1737 1738 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1739 /* 1740 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1741 * the firmware while we still have packets for it in the Tx queues. 1742 */ 1743 if (WARN_ON_ONCE(!sta)) 1744 goto out; 1745 1746 if (!IS_ERR(sta)) { 1747 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1748 1749 iwl_mvm_tx_airtime(mvm, mvmsta, 1750 le16_to_cpu(tx_resp->wireless_media_time)); 1751 1752 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1753 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1754 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1755 1756 if (sta->wme && tid != IWL_MGMT_TID) { 1757 struct iwl_mvm_tid_data *tid_data = 1758 &mvmsta->tid_data[tid]; 1759 bool send_eosp_ndp = false; 1760 1761 spin_lock_bh(&mvmsta->lock); 1762 1763 if (!is_ndp) { 1764 tid_data->next_reclaimed = next_reclaimed; 1765 IWL_DEBUG_TX_REPLY(mvm, 1766 "Next reclaimed packet:%d\n", 1767 next_reclaimed); 1768 } else { 1769 IWL_DEBUG_TX_REPLY(mvm, 1770 "NDP - don't update next_reclaimed\n"); 1771 } 1772 1773 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1774 1775 if (mvmsta->sleep_tx_count) { 1776 mvmsta->sleep_tx_count--; 1777 if (mvmsta->sleep_tx_count && 1778 !iwl_mvm_tid_queued(mvm, tid_data)) { 1779 /* 1780 * The number of frames in the queue 1781 * dropped to 0 even if we sent less 1782 * frames than we thought we had on the 1783 * Tx queue. 1784 * This means we had holes in the BA 1785 * window that we just filled, ask 1786 * mac80211 to send EOSP since the 1787 * firmware won't know how to do that. 1788 * Send NDP and the firmware will send 1789 * EOSP notification that will trigger 1790 * a call to ieee80211_sta_eosp(). 1791 */ 1792 send_eosp_ndp = true; 1793 } 1794 } 1795 1796 spin_unlock_bh(&mvmsta->lock); 1797 if (send_eosp_ndp) { 1798 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1799 IEEE80211_FRAME_RELEASE_UAPSD, 1800 1, tid, false, false); 1801 mvmsta->sleep_tx_count = 0; 1802 ieee80211_send_eosp_nullfunc(sta, tid); 1803 } 1804 } 1805 1806 if (mvmsta->next_status_eosp) { 1807 mvmsta->next_status_eosp = false; 1808 ieee80211_sta_eosp(sta); 1809 } 1810 } 1811 out: 1812 rcu_read_unlock(); 1813 } 1814 1815 #ifdef CONFIG_IWLWIFI_DEBUG 1816 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1817 static const char *iwl_get_agg_tx_status(u16 status) 1818 { 1819 switch (status & AGG_TX_STATE_STATUS_MSK) { 1820 AGG_TX_STATE_(TRANSMITTED); 1821 AGG_TX_STATE_(UNDERRUN); 1822 AGG_TX_STATE_(BT_PRIO); 1823 AGG_TX_STATE_(FEW_BYTES); 1824 AGG_TX_STATE_(ABORT); 1825 AGG_TX_STATE_(TX_ON_AIR_DROP); 1826 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1827 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1828 AGG_TX_STATE_(SCD_QUERY); 1829 AGG_TX_STATE_(TEST_BAD_CRC32); 1830 AGG_TX_STATE_(RESPONSE); 1831 AGG_TX_STATE_(DUMP_TX); 1832 AGG_TX_STATE_(DELAY_TX); 1833 } 1834 1835 return "UNKNOWN"; 1836 } 1837 1838 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1839 struct iwl_rx_packet *pkt) 1840 { 1841 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1842 struct agg_tx_status *frame_status = 1843 iwl_mvm_get_agg_status(mvm, tx_resp); 1844 int i; 1845 bool tirgger_timepoint = false; 1846 1847 for (i = 0; i < tx_resp->frame_count; i++) { 1848 u16 fstatus = le16_to_cpu(frame_status[i].status); 1849 /* In case one frame wasn't transmitted trigger time point */ 1850 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1851 AGG_TX_STATE_TRANSMITTED); 1852 IWL_DEBUG_TX_REPLY(mvm, 1853 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1854 iwl_get_agg_tx_status(fstatus), 1855 fstatus & AGG_TX_STATE_STATUS_MSK, 1856 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1857 AGG_TX_STATE_TRY_CNT_POS, 1858 le16_to_cpu(frame_status[i].sequence)); 1859 } 1860 1861 if (tirgger_timepoint) 1862 iwl_dbg_tlv_time_point(&mvm->fwrt, 1863 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1864 1865 } 1866 #else 1867 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1868 struct iwl_rx_packet *pkt) 1869 {} 1870 #endif /* CONFIG_IWLWIFI_DEBUG */ 1871 1872 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1873 struct iwl_rx_packet *pkt) 1874 { 1875 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1876 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1877 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1878 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1879 struct iwl_mvm_sta *mvmsta; 1880 int queue = SEQ_TO_QUEUE(sequence); 1881 struct ieee80211_sta *sta; 1882 1883 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1884 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1885 return; 1886 1887 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1888 1889 rcu_read_lock(); 1890 1891 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1892 1893 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1894 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) { 1895 rcu_read_unlock(); 1896 return; 1897 } 1898 1899 if (!WARN_ON_ONCE(!mvmsta)) { 1900 mvmsta->tid_data[tid].rate_n_flags = 1901 le32_to_cpu(tx_resp->initial_rate); 1902 mvmsta->tid_data[tid].tx_time = 1903 le16_to_cpu(tx_resp->wireless_media_time); 1904 mvmsta->tid_data[tid].lq_color = 1905 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1906 iwl_mvm_tx_airtime(mvm, mvmsta, 1907 le16_to_cpu(tx_resp->wireless_media_time)); 1908 } 1909 1910 rcu_read_unlock(); 1911 } 1912 1913 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1914 { 1915 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1916 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1917 1918 if (tx_resp->frame_count == 1) 1919 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1920 else 1921 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1922 } 1923 1924 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1925 int txq, int index, 1926 struct ieee80211_tx_info *tx_info, u32 rate, 1927 bool is_flush) 1928 { 1929 struct sk_buff_head reclaimed_skbs; 1930 struct iwl_mvm_tid_data *tid_data = NULL; 1931 struct ieee80211_sta *sta; 1932 struct iwl_mvm_sta *mvmsta = NULL; 1933 struct sk_buff *skb; 1934 int freed; 1935 1936 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1937 tid > IWL_MAX_TID_COUNT, 1938 "sta_id %d tid %d", sta_id, tid)) 1939 return; 1940 1941 rcu_read_lock(); 1942 1943 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1944 1945 /* Reclaiming frames for a station that has been deleted ? */ 1946 if (WARN_ON_ONCE(!sta)) { 1947 rcu_read_unlock(); 1948 return; 1949 } 1950 1951 __skb_queue_head_init(&reclaimed_skbs); 1952 1953 /* 1954 * Release all TFDs before the SSN, i.e. all TFDs in front of 1955 * block-ack window (we assume that they've been successfully 1956 * transmitted ... if not, it's too late anyway). 1957 */ 1958 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush); 1959 1960 skb_queue_walk(&reclaimed_skbs, skb) { 1961 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1962 1963 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1964 1965 memset(&info->status, 0, sizeof(info->status)); 1966 /* Packet was transmitted successfully, failures come as single 1967 * frames because before failing a frame the firmware transmits 1968 * it without aggregation at least once. 1969 */ 1970 if (!is_flush) 1971 info->flags |= IEEE80211_TX_STAT_ACK; 1972 else 1973 info->flags &= ~IEEE80211_TX_STAT_ACK; 1974 } 1975 1976 /* 1977 * It's possible to get a BA response after invalidating the rcu (rcu is 1978 * invalidated in order to prevent new Tx from being sent, but there may 1979 * be some frames already in-flight). 1980 * In this case we just want to reclaim, and could skip all the 1981 * sta-dependent stuff since it's in the middle of being removed 1982 * anyways. 1983 */ 1984 if (IS_ERR(sta)) 1985 goto out; 1986 1987 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1988 tid_data = &mvmsta->tid_data[tid]; 1989 1990 if (tid_data->txq_id != txq) { 1991 IWL_ERR(mvm, 1992 "invalid reclaim request: Q %d, tid %d\n", 1993 tid_data->txq_id, tid); 1994 rcu_read_unlock(); 1995 return; 1996 } 1997 1998 spin_lock_bh(&mvmsta->lock); 1999 2000 tid_data->next_reclaimed = index; 2001 2002 iwl_mvm_check_ratid_empty(mvm, sta, tid); 2003 2004 freed = 0; 2005 2006 /* pack lq color from tid_data along the reduced txp */ 2007 tx_info->status.status_driver_data[0] = 2008 RS_DRV_DATA_PACK(tid_data->lq_color, 2009 tx_info->status.status_driver_data[0]); 2010 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 2011 2012 skb_queue_walk(&reclaimed_skbs, skb) { 2013 struct ieee80211_hdr *hdr = (void *)skb->data; 2014 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2015 2016 if (!is_flush) { 2017 if (ieee80211_is_data_qos(hdr->frame_control)) 2018 freed++; 2019 else 2020 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 2021 } 2022 2023 /* this is the first skb we deliver in this batch */ 2024 /* put the rate scaling data there */ 2025 if (freed == 1) { 2026 info->flags |= IEEE80211_TX_STAT_AMPDU; 2027 memcpy(&info->status, &tx_info->status, 2028 sizeof(tx_info->status)); 2029 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info); 2030 } 2031 } 2032 2033 spin_unlock_bh(&mvmsta->lock); 2034 2035 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 2036 * possible (i.e. first MPDU in the aggregation wasn't acked) 2037 * Still it's important to update RS about sent vs. acked. 2038 */ 2039 if (!is_flush && skb_queue_empty(&reclaimed_skbs) && 2040 !iwl_mvm_has_tlc_offload(mvm)) { 2041 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 2042 2043 /* no TLC offload, so non-MLD mode */ 2044 if (mvmsta->vif) 2045 chanctx_conf = 2046 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf); 2047 2048 if (WARN_ON_ONCE(!chanctx_conf)) 2049 goto out; 2050 2051 tx_info->band = chanctx_conf->def.chan->band; 2052 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info); 2053 2054 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 2055 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 2056 } 2057 2058 out: 2059 rcu_read_unlock(); 2060 2061 while (!skb_queue_empty(&reclaimed_skbs)) { 2062 skb = __skb_dequeue(&reclaimed_skbs); 2063 ieee80211_tx_status(mvm->hw, skb); 2064 } 2065 } 2066 2067 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2068 { 2069 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2070 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 2071 int sta_id, tid, txq, index; 2072 struct ieee80211_tx_info ba_info = {}; 2073 struct iwl_mvm_ba_notif *ba_notif; 2074 struct iwl_mvm_tid_data *tid_data; 2075 struct iwl_mvm_sta *mvmsta; 2076 2077 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 2078 2079 if (iwl_mvm_has_new_tx_api(mvm)) { 2080 struct iwl_mvm_compressed_ba_notif *ba_res = 2081 (void *)pkt->data; 2082 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 2083 u16 tfd_cnt; 2084 int i; 2085 2086 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len, 2087 "short BA notification (%d)\n", pkt_len)) 2088 return; 2089 2090 sta_id = ba_res->sta_id; 2091 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 2092 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 2093 ba_info.status.tx_time = 2094 (u16)le32_to_cpu(ba_res->wireless_time); 2095 ba_info.status.status_driver_data[0] = 2096 (void *)(uintptr_t)ba_res->reduced_txp; 2097 2098 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 2099 if (!tfd_cnt) 2100 return; 2101 2102 if (IWL_FW_CHECK(mvm, 2103 struct_size(ba_res, tfd, tfd_cnt) > pkt_len, 2104 "short BA notification (tfds:%d, size:%d)\n", 2105 tfd_cnt, pkt_len)) 2106 return; 2107 2108 rcu_read_lock(); 2109 2110 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2111 /* 2112 * It's possible to get a BA response after invalidating the rcu 2113 * (rcu is invalidated in order to prevent new Tx from being 2114 * sent, but there may be some frames already in-flight). 2115 * In this case we just want to reclaim, and could skip all the 2116 * sta-dependent stuff since it's in the middle of being removed 2117 * anyways. 2118 */ 2119 2120 /* Free per TID */ 2121 for (i = 0; i < tfd_cnt; i++) { 2122 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 2123 &ba_res->tfd[i]; 2124 2125 tid = ba_tfd->tid; 2126 if (tid == IWL_MGMT_TID) 2127 tid = IWL_MAX_TID_COUNT; 2128 2129 if (mvmsta) 2130 mvmsta->tid_data[i].lq_color = lq_color; 2131 2132 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 2133 (int)(le16_to_cpu(ba_tfd->q_num)), 2134 le16_to_cpu(ba_tfd->tfd_index), 2135 &ba_info, 2136 le32_to_cpu(ba_res->tx_rate), false); 2137 } 2138 2139 if (mvmsta) 2140 iwl_mvm_tx_airtime(mvm, mvmsta, 2141 le32_to_cpu(ba_res->wireless_time)); 2142 rcu_read_unlock(); 2143 2144 IWL_DEBUG_TX_REPLY(mvm, 2145 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2146 sta_id, le32_to_cpu(ba_res->flags), 2147 le16_to_cpu(ba_res->txed), 2148 le16_to_cpu(ba_res->done)); 2149 return; 2150 } 2151 2152 ba_notif = (void *)pkt->data; 2153 sta_id = ba_notif->sta_id; 2154 tid = ba_notif->tid; 2155 /* "flow" corresponds to Tx queue */ 2156 txq = le16_to_cpu(ba_notif->scd_flow); 2157 /* "ssn" is start of block-ack Tx window, corresponds to index 2158 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2159 index = le16_to_cpu(ba_notif->scd_ssn); 2160 2161 rcu_read_lock(); 2162 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2163 if (IWL_FW_CHECK(mvm, !mvmsta, 2164 "invalid STA ID %d in BA notif\n", 2165 sta_id)) { 2166 rcu_read_unlock(); 2167 return; 2168 } 2169 2170 tid_data = &mvmsta->tid_data[tid]; 2171 2172 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2173 ba_info.status.ampdu_len = ba_notif->txed; 2174 ba_info.status.tx_time = tid_data->tx_time; 2175 ba_info.status.status_driver_data[0] = 2176 (void *)(uintptr_t)ba_notif->reduced_txp; 2177 2178 rcu_read_unlock(); 2179 2180 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2181 tid_data->rate_n_flags, false); 2182 2183 IWL_DEBUG_TX_REPLY(mvm, 2184 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2185 ba_notif->sta_addr, ba_notif->sta_id); 2186 2187 IWL_DEBUG_TX_REPLY(mvm, 2188 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2189 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2190 le64_to_cpu(ba_notif->bitmap), txq, index, 2191 ba_notif->txed, ba_notif->txed_2_done); 2192 2193 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2194 ba_notif->reduced_txp); 2195 } 2196 2197 /* 2198 * Note that there are transports that buffer frames before they reach 2199 * the firmware. This means that after flush_tx_path is called, the 2200 * queue might not be empty. The race-free way to handle this is to: 2201 * 1) set the station as draining 2202 * 2) flush the Tx path 2203 * 3) wait for the transport queues to be empty 2204 */ 2205 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2206 { 2207 int ret; 2208 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2209 .queues_ctl = cpu_to_le32(tfd_msk), 2210 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2211 }; 2212 2213 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2214 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2215 sizeof(flush_cmd), &flush_cmd); 2216 if (ret) 2217 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2218 return ret; 2219 } 2220 2221 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2222 { 2223 int ret; 2224 struct iwl_tx_path_flush_cmd_rsp *rsp; 2225 struct iwl_tx_path_flush_cmd flush_cmd = { 2226 .sta_id = cpu_to_le32(sta_id), 2227 .tid_mask = cpu_to_le16(tids), 2228 }; 2229 2230 struct iwl_host_cmd cmd = { 2231 .id = TXPATH_FLUSH, 2232 .len = { sizeof(flush_cmd), }, 2233 .data = { &flush_cmd, }, 2234 }; 2235 2236 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2237 2238 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2239 cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL; 2240 2241 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2242 sta_id, tids); 2243 2244 ret = iwl_mvm_send_cmd(mvm, &cmd); 2245 2246 if (ret) { 2247 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2248 return ret; 2249 } 2250 2251 if (cmd.flags & CMD_WANT_SKB) { 2252 int i; 2253 int num_flushed_queues; 2254 2255 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2256 ret = -EIO; 2257 goto free_rsp; 2258 } 2259 2260 rsp = (void *)cmd.resp_pkt->data; 2261 2262 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2263 "sta_id %d != rsp_sta_id %d", 2264 sta_id, le16_to_cpu(rsp->sta_id))) { 2265 ret = -EIO; 2266 goto free_rsp; 2267 } 2268 2269 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2270 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2271 "num_flushed_queues %d", num_flushed_queues)) { 2272 ret = -EIO; 2273 goto free_rsp; 2274 } 2275 2276 for (i = 0; i < num_flushed_queues; i++) { 2277 struct ieee80211_tx_info tx_info = {}; 2278 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2279 int tid = le16_to_cpu(queue_info->tid); 2280 int read_before = le16_to_cpu(queue_info->read_before_flush); 2281 int read_after = le16_to_cpu(queue_info->read_after_flush); 2282 int queue_num = le16_to_cpu(queue_info->queue_num); 2283 2284 if (tid == IWL_MGMT_TID) 2285 tid = IWL_MAX_TID_COUNT; 2286 2287 IWL_DEBUG_TX_QUEUES(mvm, 2288 "tid %d queue_id %d read-before %d read-after %d\n", 2289 tid, queue_num, read_before, read_after); 2290 2291 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2292 &tx_info, 0, true); 2293 } 2294 free_rsp: 2295 iwl_free_resp(&cmd); 2296 } 2297 return ret; 2298 } 2299 2300 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask) 2301 { 2302 if (iwl_mvm_has_new_tx_api(mvm)) 2303 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff); 2304 2305 return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask); 2306 } 2307