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