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