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 u8 *ie, *pos; 615 u8 match[] = { 616 (WLAN_OUI_WFA >> 16) & 0xff, 617 (WLAN_OUI_WFA >> 8) & 0xff, 618 WLAN_OUI_WFA & 0xff, 619 WLAN_OUI_TYPE_WFA_P2P, 620 }; 621 622 rcu_read_lock(); 623 624 resp_data = rcu_dereference(mvmvif->probe_resp_data); 625 if (!resp_data) 626 goto out; 627 628 if (!resp_data->notif.noa_active) 629 goto out; 630 631 ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 632 mgmt->u.probe_resp.variable, 633 skb->len - base_len, 634 match, 4, 2); 635 if (!ie) { 636 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 637 goto out; 638 } 639 640 if (skb_tailroom(skb) < resp_data->noa_len) { 641 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 642 IWL_ERR(mvm, 643 "Failed to reallocate probe resp\n"); 644 goto out; 645 } 646 } 647 648 pos = skb_put(skb, resp_data->noa_len); 649 650 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 651 /* Set length of IE body (not including ID and length itself) */ 652 *pos++ = resp_data->noa_len - 2; 653 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 654 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 655 *pos++ = WLAN_OUI_WFA & 0xff; 656 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 657 658 memcpy(pos, &resp_data->notif.noa_attr, 659 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 660 661 out: 662 rcu_read_unlock(); 663 } 664 665 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 666 { 667 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 668 struct ieee80211_tx_info info; 669 struct iwl_device_tx_cmd *dev_cmd; 670 u8 sta_id; 671 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 672 __le16 fc = hdr->frame_control; 673 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 674 IEEE80211_TX_CTL_TX_OFFCHAN; 675 int queue = -1; 676 677 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 678 return -1; 679 680 memcpy(&info, skb->cb, sizeof(info)); 681 682 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 683 return -1; 684 685 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 686 return -1; 687 688 if (info.control.vif) { 689 struct iwl_mvm_vif *mvmvif = 690 iwl_mvm_vif_from_mac80211(info.control.vif); 691 692 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 693 info.control.vif->type == NL80211_IFTYPE_AP || 694 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 695 if (!ieee80211_is_data(hdr->frame_control)) 696 sta_id = mvmvif->bcast_sta.sta_id; 697 else 698 sta_id = mvmvif->mcast_sta.sta_id; 699 700 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr); 701 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 702 queue = mvm->snif_queue; 703 sta_id = mvm->snif_sta.sta_id; 704 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 705 offchannel) { 706 /* 707 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 708 * that can be used in 2 different types of vifs, P2P & 709 * STATION. 710 * P2P uses the offchannel queue. 711 * STATION (HS2.0) uses the auxiliary context of the FW, 712 * and hence needs to be sent on the aux queue. 713 */ 714 sta_id = mvm->aux_sta.sta_id; 715 queue = mvm->aux_queue; 716 } 717 } 718 719 if (queue < 0) { 720 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 721 return -1; 722 } 723 724 if (unlikely(ieee80211_is_probe_resp(fc))) 725 iwl_mvm_probe_resp_set_noa(mvm, skb); 726 727 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 728 729 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 730 if (!dev_cmd) 731 return -1; 732 733 /* From now on, we cannot access info->control */ 734 iwl_mvm_skb_prepare_status(skb, dev_cmd); 735 736 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 737 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 738 return -1; 739 } 740 741 return 0; 742 } 743 744 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 745 struct ieee80211_sta *sta, unsigned int tid) 746 { 747 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 748 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band; 749 u8 ac = tid_to_mac80211_ac[tid]; 750 unsigned int txf; 751 int lmac = iwl_mvm_get_lmac_id(mvm->fw, band); 752 753 /* For HE redirect to trigger based fifos */ 754 if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 755 ac += 4; 756 757 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 758 759 /* 760 * Don't send an AMSDU that will be longer than the TXF. 761 * Add a security margin of 256 for the TX command + headers. 762 * We also want to have the start of the next packet inside the 763 * fifo to be able to send bursts. 764 */ 765 return min_t(unsigned int, mvmsta->max_amsdu_len, 766 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 767 } 768 769 #ifdef CONFIG_INET 770 771 static int 772 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 773 netdev_features_t netdev_flags, 774 struct sk_buff_head *mpdus_skb) 775 { 776 struct sk_buff *tmp, *next; 777 struct ieee80211_hdr *hdr = (void *)skb->data; 778 char cb[sizeof(skb->cb)]; 779 u16 i = 0; 780 unsigned int tcp_payload_len; 781 unsigned int mss = skb_shinfo(skb)->gso_size; 782 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 783 bool qos = ieee80211_is_data_qos(hdr->frame_control); 784 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 785 786 skb_shinfo(skb)->gso_size = num_subframes * mss; 787 memcpy(cb, skb->cb, sizeof(cb)); 788 789 next = skb_gso_segment(skb, netdev_flags); 790 skb_shinfo(skb)->gso_size = mss; 791 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 792 if (WARN_ON_ONCE(IS_ERR(next))) 793 return -EINVAL; 794 else if (next) 795 consume_skb(skb); 796 797 skb_list_walk_safe(next, tmp, next) { 798 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 799 /* 800 * Compute the length of all the data added for the A-MSDU. 801 * This will be used to compute the length to write in the TX 802 * command. We have: SNAP + IP + TCP for n -1 subframes and 803 * ETH header for n subframes. 804 */ 805 tcp_payload_len = skb_tail_pointer(tmp) - 806 skb_transport_header(tmp) - 807 tcp_hdrlen(tmp) + tmp->data_len; 808 809 if (ipv4) 810 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 811 812 if (tcp_payload_len > mss) { 813 skb_shinfo(tmp)->gso_size = mss; 814 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 : 815 SKB_GSO_TCPV6; 816 } else { 817 if (qos) { 818 u8 *qc; 819 820 if (ipv4) 821 ip_send_check(ip_hdr(tmp)); 822 823 qc = ieee80211_get_qos_ctl((void *)tmp->data); 824 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 825 } 826 skb_shinfo(tmp)->gso_size = 0; 827 } 828 829 skb_mark_not_on_list(tmp); 830 __skb_queue_tail(mpdus_skb, tmp); 831 i++; 832 } 833 834 return 0; 835 } 836 837 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 838 struct ieee80211_tx_info *info, 839 struct ieee80211_sta *sta, 840 struct sk_buff_head *mpdus_skb) 841 { 842 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 843 struct ieee80211_hdr *hdr = (void *)skb->data; 844 unsigned int mss = skb_shinfo(skb)->gso_size; 845 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 846 u16 snap_ip_tcp, pad; 847 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 848 u8 tid; 849 850 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 851 tcp_hdrlen(skb); 852 853 if (!mvmsta->max_amsdu_len || 854 !ieee80211_is_data_qos(hdr->frame_control) || 855 !mvmsta->amsdu_enabled) 856 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 857 858 /* 859 * Do not build AMSDU for IPv6 with extension headers. 860 * ask stack to segment and checkum the generated MPDUs for us. 861 */ 862 if (skb->protocol == htons(ETH_P_IPV6) && 863 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 864 IPPROTO_TCP) { 865 netdev_flags &= ~NETIF_F_CSUM_MASK; 866 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 867 } 868 869 tid = ieee80211_get_tid(hdr); 870 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 871 return -EINVAL; 872 873 /* 874 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 875 * during an BA session. 876 */ 877 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 878 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 879 !(mvmsta->amsdu_enabled & BIT(tid))) 880 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 881 882 /* 883 * Take the min of ieee80211 station and mvm station 884 */ 885 max_amsdu_len = 886 min_t(unsigned int, sta->max_amsdu_len, 887 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 888 889 /* 890 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 891 * supported. This is a spec requirement (IEEE 802.11-2015 892 * section 8.7.3 NOTE 3). 893 */ 894 if (info->flags & IEEE80211_TX_CTL_AMPDU && 895 !sta->vht_cap.vht_supported) 896 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 897 898 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 899 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 900 pad = (4 - subf_len) & 0x3; 901 902 /* 903 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 904 * N * subf_len + (N - 1) * pad. 905 */ 906 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 907 908 if (sta->max_amsdu_subframes && 909 num_subframes > sta->max_amsdu_subframes) 910 num_subframes = sta->max_amsdu_subframes; 911 912 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 913 tcp_hdrlen(skb) + skb->data_len; 914 915 /* 916 * Make sure we have enough TBs for the A-MSDU: 917 * 2 for each subframe 918 * 1 more for each fragment 919 * 1 more for the potential data in the header 920 */ 921 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 922 mvm->trans->max_skb_frags) 923 num_subframes = 1; 924 925 if (num_subframes > 1) 926 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 927 928 /* This skb fits in one single A-MSDU */ 929 if (num_subframes * mss >= tcp_payload_len) { 930 __skb_queue_tail(mpdus_skb, skb); 931 return 0; 932 } 933 934 /* 935 * Trick the segmentation function to make it 936 * create SKBs that can fit into one A-MSDU. 937 */ 938 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 939 mpdus_skb); 940 } 941 #else /* CONFIG_INET */ 942 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 943 struct ieee80211_tx_info *info, 944 struct ieee80211_sta *sta, 945 struct sk_buff_head *mpdus_skb) 946 { 947 /* Impossible to get TSO with CONFIG_INET */ 948 WARN_ON(1); 949 950 return -1; 951 } 952 #endif 953 954 /* Check if there are any timed-out TIDs on a given shared TXQ */ 955 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 956 { 957 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 958 unsigned long now = jiffies; 959 int tid; 960 961 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 962 return false; 963 964 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 965 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 966 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 967 return true; 968 } 969 970 return false; 971 } 972 973 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 974 struct iwl_mvm_sta *mvmsta, 975 int airtime) 976 { 977 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 978 struct iwl_mvm_tcm_mac *mdata; 979 980 if (mac >= NUM_MAC_INDEX_DRIVER) 981 return; 982 983 mdata = &mvm->tcm.data[mac]; 984 985 if (mvm->tcm.paused) 986 return; 987 988 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 989 schedule_delayed_work(&mvm->tcm.work, 0); 990 991 mdata->tx.airtime += airtime; 992 } 993 994 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 995 struct iwl_mvm_sta *mvmsta, int tid) 996 { 997 u32 ac = tid_to_mac80211_ac[tid]; 998 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 999 struct iwl_mvm_tcm_mac *mdata; 1000 1001 if (mac >= NUM_MAC_INDEX_DRIVER) 1002 return -EINVAL; 1003 1004 mdata = &mvm->tcm.data[mac]; 1005 1006 mdata->tx.pkts[ac]++; 1007 1008 return 0; 1009 } 1010 1011 /* 1012 * Sets the fields in the Tx cmd that are crypto related. 1013 * 1014 * This function must be called with BHs disabled. 1015 */ 1016 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1017 struct ieee80211_tx_info *info, 1018 struct ieee80211_sta *sta) 1019 { 1020 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1021 struct iwl_mvm_sta *mvmsta; 1022 struct iwl_device_tx_cmd *dev_cmd; 1023 __le16 fc; 1024 u16 seq_number = 0; 1025 u8 tid = IWL_MAX_TID_COUNT; 1026 u16 txq_id; 1027 bool is_ampdu = false; 1028 int hdrlen; 1029 1030 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1031 fc = hdr->frame_control; 1032 hdrlen = ieee80211_hdrlen(fc); 1033 1034 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1035 return -1; 1036 1037 if (WARN_ON_ONCE(!mvmsta)) 1038 return -1; 1039 1040 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1041 return -1; 1042 1043 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->he_cap.has_he) 1044 return -1; 1045 1046 if (unlikely(ieee80211_is_probe_resp(fc))) 1047 iwl_mvm_probe_resp_set_noa(mvm, skb); 1048 1049 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1050 sta, mvmsta->sta_id); 1051 if (!dev_cmd) 1052 goto drop; 1053 1054 /* 1055 * we handle that entirely ourselves -- for uAPSD the firmware 1056 * will always send a notification, and for PS-Poll responses 1057 * we'll notify mac80211 when getting frame status 1058 */ 1059 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1060 1061 spin_lock(&mvmsta->lock); 1062 1063 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1064 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 1065 * assignment of MGMT TID 1066 */ 1067 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1068 tid = ieee80211_get_tid(hdr); 1069 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1070 goto drop_unlock_sta; 1071 1072 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1073 if (WARN_ONCE(is_ampdu && 1074 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1075 "Invalid internal agg state %d for TID %d", 1076 mvmsta->tid_data[tid].state, tid)) 1077 goto drop_unlock_sta; 1078 1079 seq_number = mvmsta->tid_data[tid].seq_number; 1080 seq_number &= IEEE80211_SCTL_SEQ; 1081 1082 if (!iwl_mvm_has_new_tx_api(mvm)) { 1083 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1084 1085 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1086 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1087 /* update the tx_cmd hdr as it was already copied */ 1088 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1089 } 1090 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) { 1091 tid = IWL_TID_NON_QOS; 1092 } 1093 1094 txq_id = mvmsta->tid_data[tid].txq_id; 1095 1096 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1097 1098 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1099 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1100 spin_unlock(&mvmsta->lock); 1101 return -1; 1102 } 1103 1104 if (!iwl_mvm_has_new_tx_api(mvm)) { 1105 /* Keep track of the time of the last frame for this RA/TID */ 1106 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1107 1108 /* 1109 * If we have timed-out TIDs - schedule the worker that will 1110 * reconfig the queues and update them 1111 * 1112 * Note that the no lock is taken here in order to not serialize 1113 * the TX flow. This isn't dangerous because scheduling 1114 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1115 * schedule it due to some race condition then next TX we get 1116 * here we will. 1117 */ 1118 if (unlikely(mvm->queue_info[txq_id].status == 1119 IWL_MVM_QUEUE_SHARED && 1120 iwl_mvm_txq_should_update(mvm, txq_id))) 1121 schedule_work(&mvm->add_stream_wk); 1122 } 1123 1124 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1125 mvmsta->sta_id, tid, txq_id, 1126 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1127 1128 /* From now on, we cannot access info->control */ 1129 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1130 1131 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1132 goto drop_unlock_sta; 1133 1134 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1135 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1136 1137 spin_unlock(&mvmsta->lock); 1138 1139 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1140 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1141 goto drop; 1142 1143 return 0; 1144 1145 drop_unlock_sta: 1146 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1147 spin_unlock(&mvmsta->lock); 1148 drop: 1149 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid); 1150 return -1; 1151 } 1152 1153 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1154 struct ieee80211_sta *sta) 1155 { 1156 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1157 struct ieee80211_tx_info info; 1158 struct sk_buff_head mpdus_skbs; 1159 unsigned int payload_len; 1160 int ret; 1161 1162 if (WARN_ON_ONCE(!mvmsta)) 1163 return -1; 1164 1165 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1166 return -1; 1167 1168 memcpy(&info, skb->cb, sizeof(info)); 1169 1170 if (!skb_is_gso(skb)) 1171 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1172 1173 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1174 tcp_hdrlen(skb) + skb->data_len; 1175 1176 if (payload_len <= skb_shinfo(skb)->gso_size) 1177 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1178 1179 __skb_queue_head_init(&mpdus_skbs); 1180 1181 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1182 if (ret) 1183 return ret; 1184 1185 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1186 return ret; 1187 1188 while (!skb_queue_empty(&mpdus_skbs)) { 1189 skb = __skb_dequeue(&mpdus_skbs); 1190 1191 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1192 if (ret) { 1193 __skb_queue_purge(&mpdus_skbs); 1194 return ret; 1195 } 1196 } 1197 1198 return 0; 1199 } 1200 1201 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1202 struct ieee80211_sta *sta, u8 tid) 1203 { 1204 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1205 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1206 struct ieee80211_vif *vif = mvmsta->vif; 1207 u16 normalized_ssn; 1208 1209 lockdep_assert_held(&mvmsta->lock); 1210 1211 if ((tid_data->state == IWL_AGG_ON || 1212 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1213 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1214 /* 1215 * Now that this aggregation or DQA queue is empty tell 1216 * mac80211 so it knows we no longer have frames buffered for 1217 * the station on this TID (for the TIM bitmap calculation.) 1218 */ 1219 ieee80211_sta_set_buffered(sta, tid, false); 1220 } 1221 1222 /* 1223 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1224 * to align the wrap around of ssn so we compare relevant values. 1225 */ 1226 normalized_ssn = tid_data->ssn; 1227 if (mvm->trans->trans_cfg->gen2) 1228 normalized_ssn &= 0xff; 1229 1230 if (normalized_ssn != tid_data->next_reclaimed) 1231 return; 1232 1233 switch (tid_data->state) { 1234 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1235 IWL_DEBUG_TX_QUEUES(mvm, 1236 "Can continue addBA flow ssn = next_recl = %d\n", 1237 tid_data->next_reclaimed); 1238 tid_data->state = IWL_AGG_STARTING; 1239 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1240 break; 1241 1242 case IWL_EMPTYING_HW_QUEUE_DELBA: 1243 IWL_DEBUG_TX_QUEUES(mvm, 1244 "Can continue DELBA flow ssn = next_recl = %d\n", 1245 tid_data->next_reclaimed); 1246 tid_data->state = IWL_AGG_OFF; 1247 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1248 break; 1249 1250 default: 1251 break; 1252 } 1253 } 1254 1255 #ifdef CONFIG_IWLWIFI_DEBUG 1256 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1257 { 1258 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1259 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1260 1261 switch (status & TX_STATUS_MSK) { 1262 case TX_STATUS_SUCCESS: 1263 return "SUCCESS"; 1264 TX_STATUS_POSTPONE(DELAY); 1265 TX_STATUS_POSTPONE(FEW_BYTES); 1266 TX_STATUS_POSTPONE(BT_PRIO); 1267 TX_STATUS_POSTPONE(QUIET_PERIOD); 1268 TX_STATUS_POSTPONE(CALC_TTAK); 1269 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1270 TX_STATUS_FAIL(SHORT_LIMIT); 1271 TX_STATUS_FAIL(LONG_LIMIT); 1272 TX_STATUS_FAIL(UNDERRUN); 1273 TX_STATUS_FAIL(DRAIN_FLOW); 1274 TX_STATUS_FAIL(RFKILL_FLUSH); 1275 TX_STATUS_FAIL(LIFE_EXPIRE); 1276 TX_STATUS_FAIL(DEST_PS); 1277 TX_STATUS_FAIL(HOST_ABORTED); 1278 TX_STATUS_FAIL(BT_RETRY); 1279 TX_STATUS_FAIL(STA_INVALID); 1280 TX_STATUS_FAIL(FRAG_DROPPED); 1281 TX_STATUS_FAIL(TID_DISABLE); 1282 TX_STATUS_FAIL(FIFO_FLUSHED); 1283 TX_STATUS_FAIL(SMALL_CF_POLL); 1284 TX_STATUS_FAIL(FW_DROP); 1285 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1286 } 1287 1288 return "UNKNOWN"; 1289 1290 #undef TX_STATUS_FAIL 1291 #undef TX_STATUS_POSTPONE 1292 } 1293 #endif /* CONFIG_IWLWIFI_DEBUG */ 1294 1295 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1296 { 1297 switch (chan_width) { 1298 case RATE_MCS_CHAN_WIDTH_20: 1299 return 0; 1300 case RATE_MCS_CHAN_WIDTH_40: 1301 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1302 case RATE_MCS_CHAN_WIDTH_80: 1303 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1304 case RATE_MCS_CHAN_WIDTH_160: 1305 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1306 default: 1307 return 0; 1308 } 1309 } 1310 1311 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1312 enum nl80211_band band, 1313 struct ieee80211_tx_rate *r) 1314 { 1315 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1316 u32 rate = format == RATE_MCS_HT_MSK ? 1317 RATE_HT_MCS_INDEX(rate_n_flags) : 1318 rate_n_flags & RATE_MCS_CODE_MSK; 1319 1320 r->flags |= 1321 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1322 RATE_MCS_CHAN_WIDTH_MSK); 1323 1324 if (rate_n_flags & RATE_MCS_SGI_MSK) 1325 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1326 if (format == RATE_MCS_HT_MSK) { 1327 r->flags |= IEEE80211_TX_RC_MCS; 1328 r->idx = rate; 1329 } else if (format == RATE_MCS_VHT_MSK) { 1330 ieee80211_rate_set_vht(r, rate, 1331 ((rate_n_flags & RATE_MCS_NSS_MSK) >> 1332 RATE_MCS_NSS_POS) + 1); 1333 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1334 } else if (format == RATE_MCS_HE_MSK) { 1335 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1336 * but it only matters for radiotap */ 1337 r->idx = 0; 1338 } else { 1339 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1340 band); 1341 } 1342 } 1343 1344 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags, 1345 enum nl80211_band band, 1346 struct ieee80211_tx_rate *r) 1347 { 1348 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1349 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1350 1351 r->flags |= 1352 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1353 RATE_MCS_CHAN_WIDTH_MSK_V1); 1354 1355 if (rate_n_flags & RATE_MCS_SGI_MSK_V1) 1356 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1357 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 1358 r->flags |= IEEE80211_TX_RC_MCS; 1359 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 1360 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 1361 ieee80211_rate_set_vht( 1362 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1363 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1364 RATE_VHT_MCS_NSS_POS) + 1); 1365 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1366 } else { 1367 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1368 band); 1369 } 1370 } 1371 1372 /* 1373 * translate ucode response to mac80211 tx status control values 1374 */ 1375 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw, 1376 u32 rate_n_flags, 1377 struct ieee80211_tx_info *info) 1378 { 1379 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1380 1381 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP, 1382 TX_CMD, 0) > 6) 1383 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1384 1385 info->status.antenna = 1386 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1387 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, 1388 info->band, r); 1389 } 1390 1391 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1392 u32 status, __le16 frame_control) 1393 { 1394 struct iwl_fw_dbg_trigger_tlv *trig; 1395 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1396 int i; 1397 1398 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1399 enum iwl_fw_ini_time_point tp = 1400 IWL_FW_INI_TIME_POINT_TX_FAILED; 1401 1402 if (ieee80211_is_action(frame_control)) 1403 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1404 1405 iwl_dbg_tlv_time_point(&mvm->fwrt, 1406 tp, NULL); 1407 return; 1408 } 1409 1410 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1411 FW_DBG_TRIGGER_TX_STATUS); 1412 if (!trig) 1413 return; 1414 1415 status_trig = (void *)trig->data; 1416 1417 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1418 /* don't collect on status 0 */ 1419 if (!status_trig->statuses[i].status) 1420 break; 1421 1422 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1423 continue; 1424 1425 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1426 "Tx status %d was received", 1427 status & TX_STATUS_MSK); 1428 break; 1429 } 1430 } 1431 1432 /* 1433 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1434 * @tx_resp: the Tx response from the fw (agg or non-agg) 1435 * 1436 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1437 * it can't know that everything will go well until the end of the AMPDU, it 1438 * can't know in advance the number of MPDUs that will be sent in the current 1439 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1440 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1441 * of the batch. This is why the SSN of the SCD is written at the end of the 1442 * whole struct at a variable offset. This function knows how to cope with the 1443 * variable offset and returns the SSN of the SCD. 1444 */ 1445 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1446 struct iwl_mvm_tx_resp *tx_resp) 1447 { 1448 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1449 tx_resp->frame_count) & 0xfff; 1450 } 1451 1452 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1453 struct iwl_rx_packet *pkt) 1454 { 1455 struct ieee80211_sta *sta; 1456 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1457 int txq_id = SEQ_TO_QUEUE(sequence); 1458 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1459 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1460 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1461 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1462 struct agg_tx_status *agg_status = 1463 iwl_mvm_get_agg_status(mvm, tx_resp); 1464 u32 status = le16_to_cpu(agg_status->status); 1465 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1466 struct sk_buff_head skbs; 1467 u8 skb_freed = 0; 1468 u8 lq_color; 1469 u16 next_reclaimed, seq_ctl; 1470 bool is_ndp = false; 1471 1472 __skb_queue_head_init(&skbs); 1473 1474 if (iwl_mvm_has_new_tx_api(mvm)) 1475 txq_id = le16_to_cpu(tx_resp->tx_queue); 1476 1477 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1478 1479 /* we can free until ssn % q.n_bd not inclusive */ 1480 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1481 1482 while (!skb_queue_empty(&skbs)) { 1483 struct sk_buff *skb = __skb_dequeue(&skbs); 1484 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1485 struct ieee80211_hdr *hdr = (void *)skb->data; 1486 bool flushed = false; 1487 1488 skb_freed++; 1489 1490 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1491 1492 memset(&info->status, 0, sizeof(info->status)); 1493 1494 /* inform mac80211 about what happened with the frame */ 1495 switch (status & TX_STATUS_MSK) { 1496 case TX_STATUS_SUCCESS: 1497 case TX_STATUS_DIRECT_DONE: 1498 info->flags |= IEEE80211_TX_STAT_ACK; 1499 break; 1500 case TX_STATUS_FAIL_FIFO_FLUSHED: 1501 case TX_STATUS_FAIL_DRAIN_FLOW: 1502 flushed = true; 1503 break; 1504 case TX_STATUS_FAIL_DEST_PS: 1505 /* the FW should have stopped the queue and not 1506 * return this status 1507 */ 1508 IWL_ERR_LIMIT(mvm, 1509 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1510 status, le16_to_cpu(hdr->frame_control)); 1511 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1512 break; 1513 default: 1514 break; 1515 } 1516 1517 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1518 ieee80211_is_mgmt(hdr->frame_control)) 1519 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1520 1521 /* 1522 * If we are freeing multiple frames, mark all the frames 1523 * but the first one as acked, since they were acknowledged 1524 * before 1525 * */ 1526 if (skb_freed > 1) 1527 info->flags |= IEEE80211_TX_STAT_ACK; 1528 1529 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1530 1531 info->status.rates[0].count = tx_resp->failure_frame + 1; 1532 1533 iwl_mvm_hwrate_to_tx_status(mvm->fw, 1534 le32_to_cpu(tx_resp->initial_rate), 1535 info); 1536 1537 /* Don't assign the converted initial_rate, because driver 1538 * TLC uses this and doesn't support the new FW rate 1539 */ 1540 info->status.status_driver_data[1] = 1541 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1542 1543 /* Single frame failure in an AMPDU queue => send BAR */ 1544 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1545 !(info->flags & IEEE80211_TX_STAT_ACK) && 1546 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1547 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1548 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1549 1550 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1551 if (ieee80211_is_back_req(hdr->frame_control)) 1552 seq_ctl = 0; 1553 else if (status != TX_STATUS_SUCCESS) 1554 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1555 1556 if (unlikely(!seq_ctl)) { 1557 struct ieee80211_hdr *hdr = (void *)skb->data; 1558 1559 /* 1560 * If it is an NDP, we can't update next_reclaim since 1561 * its sequence control is 0. Note that for that same 1562 * reason, NDPs are never sent to A-MPDU'able queues 1563 * so that we can never have more than one freed frame 1564 * for a single Tx resonse (see WARN_ON below). 1565 */ 1566 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1567 is_ndp = true; 1568 } 1569 1570 /* 1571 * TODO: this is not accurate if we are freeing more than one 1572 * packet. 1573 */ 1574 info->status.tx_time = 1575 le16_to_cpu(tx_resp->wireless_media_time); 1576 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1577 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1578 info->status.status_driver_data[0] = 1579 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1580 1581 ieee80211_tx_status(mvm->hw, skb); 1582 } 1583 1584 /* This is an aggregation queue or might become one, so we use 1585 * the ssn since: ssn = wifi seq_num % 256. 1586 * The seq_ctl is the sequence control of the packet to which 1587 * this Tx response relates. But if there is a hole in the 1588 * bitmap of the BA we received, this Tx response may allow to 1589 * reclaim the hole and all the subsequent packets that were 1590 * already acked. In that case, seq_ctl != ssn, and the next 1591 * packet to be reclaimed will be ssn and not seq_ctl. In that 1592 * case, several packets will be reclaimed even if 1593 * frame_count = 1. 1594 * 1595 * The ssn is the index (% 256) of the latest packet that has 1596 * treated (acked / dropped) + 1. 1597 */ 1598 next_reclaimed = ssn; 1599 1600 IWL_DEBUG_TX_REPLY(mvm, 1601 "TXQ %d status %s (0x%08x)\n", 1602 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1603 1604 IWL_DEBUG_TX_REPLY(mvm, 1605 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1606 le32_to_cpu(tx_resp->initial_rate), 1607 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1608 ssn, next_reclaimed, seq_ctl); 1609 1610 rcu_read_lock(); 1611 1612 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1613 /* 1614 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1615 * the firmware while we still have packets for it in the Tx queues. 1616 */ 1617 if (WARN_ON_ONCE(!sta)) 1618 goto out; 1619 1620 if (!IS_ERR(sta)) { 1621 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1622 1623 iwl_mvm_tx_airtime(mvm, mvmsta, 1624 le16_to_cpu(tx_resp->wireless_media_time)); 1625 1626 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1627 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1628 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1629 1630 if (sta->wme && tid != IWL_MGMT_TID) { 1631 struct iwl_mvm_tid_data *tid_data = 1632 &mvmsta->tid_data[tid]; 1633 bool send_eosp_ndp = false; 1634 1635 spin_lock_bh(&mvmsta->lock); 1636 1637 if (!is_ndp) { 1638 tid_data->next_reclaimed = next_reclaimed; 1639 IWL_DEBUG_TX_REPLY(mvm, 1640 "Next reclaimed packet:%d\n", 1641 next_reclaimed); 1642 } else { 1643 IWL_DEBUG_TX_REPLY(mvm, 1644 "NDP - don't update next_reclaimed\n"); 1645 } 1646 1647 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1648 1649 if (mvmsta->sleep_tx_count) { 1650 mvmsta->sleep_tx_count--; 1651 if (mvmsta->sleep_tx_count && 1652 !iwl_mvm_tid_queued(mvm, tid_data)) { 1653 /* 1654 * The number of frames in the queue 1655 * dropped to 0 even if we sent less 1656 * frames than we thought we had on the 1657 * Tx queue. 1658 * This means we had holes in the BA 1659 * window that we just filled, ask 1660 * mac80211 to send EOSP since the 1661 * firmware won't know how to do that. 1662 * Send NDP and the firmware will send 1663 * EOSP notification that will trigger 1664 * a call to ieee80211_sta_eosp(). 1665 */ 1666 send_eosp_ndp = true; 1667 } 1668 } 1669 1670 spin_unlock_bh(&mvmsta->lock); 1671 if (send_eosp_ndp) { 1672 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1673 IEEE80211_FRAME_RELEASE_UAPSD, 1674 1, tid, false, false); 1675 mvmsta->sleep_tx_count = 0; 1676 ieee80211_send_eosp_nullfunc(sta, tid); 1677 } 1678 } 1679 1680 if (mvmsta->next_status_eosp) { 1681 mvmsta->next_status_eosp = false; 1682 ieee80211_sta_eosp(sta); 1683 } 1684 } 1685 out: 1686 rcu_read_unlock(); 1687 } 1688 1689 #ifdef CONFIG_IWLWIFI_DEBUG 1690 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1691 static const char *iwl_get_agg_tx_status(u16 status) 1692 { 1693 switch (status & AGG_TX_STATE_STATUS_MSK) { 1694 AGG_TX_STATE_(TRANSMITTED); 1695 AGG_TX_STATE_(UNDERRUN); 1696 AGG_TX_STATE_(BT_PRIO); 1697 AGG_TX_STATE_(FEW_BYTES); 1698 AGG_TX_STATE_(ABORT); 1699 AGG_TX_STATE_(TX_ON_AIR_DROP); 1700 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1701 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1702 AGG_TX_STATE_(SCD_QUERY); 1703 AGG_TX_STATE_(TEST_BAD_CRC32); 1704 AGG_TX_STATE_(RESPONSE); 1705 AGG_TX_STATE_(DUMP_TX); 1706 AGG_TX_STATE_(DELAY_TX); 1707 } 1708 1709 return "UNKNOWN"; 1710 } 1711 1712 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1713 struct iwl_rx_packet *pkt) 1714 { 1715 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1716 struct agg_tx_status *frame_status = 1717 iwl_mvm_get_agg_status(mvm, tx_resp); 1718 int i; 1719 bool tirgger_timepoint = false; 1720 1721 for (i = 0; i < tx_resp->frame_count; i++) { 1722 u16 fstatus = le16_to_cpu(frame_status[i].status); 1723 /* In case one frame wasn't transmitted trigger time point */ 1724 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1725 AGG_TX_STATE_TRANSMITTED); 1726 IWL_DEBUG_TX_REPLY(mvm, 1727 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1728 iwl_get_agg_tx_status(fstatus), 1729 fstatus & AGG_TX_STATE_STATUS_MSK, 1730 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1731 AGG_TX_STATE_TRY_CNT_POS, 1732 le16_to_cpu(frame_status[i].sequence)); 1733 } 1734 1735 if (tirgger_timepoint) 1736 iwl_dbg_tlv_time_point(&mvm->fwrt, 1737 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1738 1739 } 1740 #else 1741 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1742 struct iwl_rx_packet *pkt) 1743 {} 1744 #endif /* CONFIG_IWLWIFI_DEBUG */ 1745 1746 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1747 struct iwl_rx_packet *pkt) 1748 { 1749 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1750 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1751 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1752 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1753 struct iwl_mvm_sta *mvmsta; 1754 int queue = SEQ_TO_QUEUE(sequence); 1755 struct ieee80211_sta *sta; 1756 1757 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1758 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1759 return; 1760 1761 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1762 1763 rcu_read_lock(); 1764 1765 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1766 1767 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1768 if (WARN_ON_ONCE(!sta || !sta->wme)) { 1769 rcu_read_unlock(); 1770 return; 1771 } 1772 1773 if (!WARN_ON_ONCE(!mvmsta)) { 1774 mvmsta->tid_data[tid].rate_n_flags = 1775 le32_to_cpu(tx_resp->initial_rate); 1776 mvmsta->tid_data[tid].tx_time = 1777 le16_to_cpu(tx_resp->wireless_media_time); 1778 mvmsta->tid_data[tid].lq_color = 1779 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1780 iwl_mvm_tx_airtime(mvm, mvmsta, 1781 le16_to_cpu(tx_resp->wireless_media_time)); 1782 } 1783 1784 rcu_read_unlock(); 1785 } 1786 1787 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1788 { 1789 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1790 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1791 1792 if (tx_resp->frame_count == 1) 1793 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1794 else 1795 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1796 } 1797 1798 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1799 int txq, int index, 1800 struct ieee80211_tx_info *tx_info, u32 rate, 1801 bool is_flush) 1802 { 1803 struct sk_buff_head reclaimed_skbs; 1804 struct iwl_mvm_tid_data *tid_data = NULL; 1805 struct ieee80211_sta *sta; 1806 struct iwl_mvm_sta *mvmsta = NULL; 1807 struct sk_buff *skb; 1808 int freed; 1809 1810 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1811 tid > IWL_MAX_TID_COUNT, 1812 "sta_id %d tid %d", sta_id, tid)) 1813 return; 1814 1815 rcu_read_lock(); 1816 1817 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1818 1819 /* Reclaiming frames for a station that has been deleted ? */ 1820 if (WARN_ON_ONCE(!sta)) { 1821 rcu_read_unlock(); 1822 return; 1823 } 1824 1825 __skb_queue_head_init(&reclaimed_skbs); 1826 1827 /* 1828 * Release all TFDs before the SSN, i.e. all TFDs in front of 1829 * block-ack window (we assume that they've been successfully 1830 * transmitted ... if not, it's too late anyway). 1831 */ 1832 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1833 1834 skb_queue_walk(&reclaimed_skbs, skb) { 1835 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1836 1837 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1838 1839 memset(&info->status, 0, sizeof(info->status)); 1840 /* Packet was transmitted successfully, failures come as single 1841 * frames because before failing a frame the firmware transmits 1842 * it without aggregation at least once. 1843 */ 1844 if (!is_flush) 1845 info->flags |= IEEE80211_TX_STAT_ACK; 1846 } 1847 1848 /* 1849 * It's possible to get a BA response after invalidating the rcu (rcu is 1850 * invalidated in order to prevent new Tx from being sent, but there may 1851 * be some frames already in-flight). 1852 * In this case we just want to reclaim, and could skip all the 1853 * sta-dependent stuff since it's in the middle of being removed 1854 * anyways. 1855 */ 1856 if (IS_ERR(sta)) 1857 goto out; 1858 1859 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1860 tid_data = &mvmsta->tid_data[tid]; 1861 1862 if (tid_data->txq_id != txq) { 1863 IWL_ERR(mvm, 1864 "invalid reclaim request: Q %d, tid %d\n", 1865 tid_data->txq_id, tid); 1866 rcu_read_unlock(); 1867 return; 1868 } 1869 1870 spin_lock_bh(&mvmsta->lock); 1871 1872 tid_data->next_reclaimed = index; 1873 1874 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1875 1876 freed = 0; 1877 1878 /* pack lq color from tid_data along the reduced txp */ 1879 tx_info->status.status_driver_data[0] = 1880 RS_DRV_DATA_PACK(tid_data->lq_color, 1881 tx_info->status.status_driver_data[0]); 1882 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1883 1884 skb_queue_walk(&reclaimed_skbs, skb) { 1885 struct ieee80211_hdr *hdr = (void *)skb->data; 1886 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1887 1888 if (!is_flush) { 1889 if (ieee80211_is_data_qos(hdr->frame_control)) 1890 freed++; 1891 else 1892 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1893 } 1894 1895 /* this is the first skb we deliver in this batch */ 1896 /* put the rate scaling data there */ 1897 if (freed == 1) { 1898 info->flags |= IEEE80211_TX_STAT_AMPDU; 1899 memcpy(&info->status, &tx_info->status, 1900 sizeof(tx_info->status)); 1901 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info); 1902 } 1903 } 1904 1905 spin_unlock_bh(&mvmsta->lock); 1906 1907 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1908 * possible (i.e. first MPDU in the aggregation wasn't acked) 1909 * Still it's important to update RS about sent vs. acked. 1910 */ 1911 if (!is_flush && skb_queue_empty(&reclaimed_skbs)) { 1912 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1913 1914 if (mvmsta->vif) 1915 chanctx_conf = 1916 rcu_dereference(mvmsta->vif->chanctx_conf); 1917 1918 if (WARN_ON_ONCE(!chanctx_conf)) 1919 goto out; 1920 1921 tx_info->band = chanctx_conf->def.chan->band; 1922 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info); 1923 1924 if (!iwl_mvm_has_tlc_offload(mvm)) { 1925 IWL_DEBUG_TX_REPLY(mvm, 1926 "No reclaim. Update rs directly\n"); 1927 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 1928 } 1929 } 1930 1931 out: 1932 rcu_read_unlock(); 1933 1934 while (!skb_queue_empty(&reclaimed_skbs)) { 1935 skb = __skb_dequeue(&reclaimed_skbs); 1936 ieee80211_tx_status(mvm->hw, skb); 1937 } 1938 } 1939 1940 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1941 { 1942 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1943 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 1944 int sta_id, tid, txq, index; 1945 struct ieee80211_tx_info ba_info = {}; 1946 struct iwl_mvm_ba_notif *ba_notif; 1947 struct iwl_mvm_tid_data *tid_data; 1948 struct iwl_mvm_sta *mvmsta; 1949 1950 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1951 1952 if (iwl_mvm_has_new_tx_api(mvm)) { 1953 struct iwl_mvm_compressed_ba_notif *ba_res = 1954 (void *)pkt->data; 1955 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 1956 u16 tfd_cnt; 1957 int i; 1958 1959 if (unlikely(sizeof(*ba_res) > pkt_len)) 1960 return; 1961 1962 sta_id = ba_res->sta_id; 1963 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1964 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1965 ba_info.status.tx_time = 1966 (u16)le32_to_cpu(ba_res->wireless_time); 1967 ba_info.status.status_driver_data[0] = 1968 (void *)(uintptr_t)ba_res->reduced_txp; 1969 1970 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 1971 if (!tfd_cnt || struct_size(ba_res, tfd, tfd_cnt) > pkt_len) 1972 return; 1973 1974 rcu_read_lock(); 1975 1976 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1977 /* 1978 * It's possible to get a BA response after invalidating the rcu 1979 * (rcu is invalidated in order to prevent new Tx from being 1980 * sent, but there may be some frames already in-flight). 1981 * In this case we just want to reclaim, and could skip all the 1982 * sta-dependent stuff since it's in the middle of being removed 1983 * anyways. 1984 */ 1985 1986 /* Free per TID */ 1987 for (i = 0; i < tfd_cnt; i++) { 1988 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1989 &ba_res->tfd[i]; 1990 1991 tid = ba_tfd->tid; 1992 if (tid == IWL_MGMT_TID) 1993 tid = IWL_MAX_TID_COUNT; 1994 1995 if (mvmsta) 1996 mvmsta->tid_data[i].lq_color = lq_color; 1997 1998 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 1999 (int)(le16_to_cpu(ba_tfd->q_num)), 2000 le16_to_cpu(ba_tfd->tfd_index), 2001 &ba_info, 2002 le32_to_cpu(ba_res->tx_rate), false); 2003 } 2004 2005 if (mvmsta) 2006 iwl_mvm_tx_airtime(mvm, mvmsta, 2007 le32_to_cpu(ba_res->wireless_time)); 2008 rcu_read_unlock(); 2009 2010 IWL_DEBUG_TX_REPLY(mvm, 2011 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2012 sta_id, le32_to_cpu(ba_res->flags), 2013 le16_to_cpu(ba_res->txed), 2014 le16_to_cpu(ba_res->done)); 2015 return; 2016 } 2017 2018 ba_notif = (void *)pkt->data; 2019 sta_id = ba_notif->sta_id; 2020 tid = ba_notif->tid; 2021 /* "flow" corresponds to Tx queue */ 2022 txq = le16_to_cpu(ba_notif->scd_flow); 2023 /* "ssn" is start of block-ack Tx window, corresponds to index 2024 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2025 index = le16_to_cpu(ba_notif->scd_ssn); 2026 2027 rcu_read_lock(); 2028 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2029 if (WARN_ON_ONCE(!mvmsta)) { 2030 rcu_read_unlock(); 2031 return; 2032 } 2033 2034 tid_data = &mvmsta->tid_data[tid]; 2035 2036 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2037 ba_info.status.ampdu_len = ba_notif->txed; 2038 ba_info.status.tx_time = tid_data->tx_time; 2039 ba_info.status.status_driver_data[0] = 2040 (void *)(uintptr_t)ba_notif->reduced_txp; 2041 2042 rcu_read_unlock(); 2043 2044 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2045 tid_data->rate_n_flags, false); 2046 2047 IWL_DEBUG_TX_REPLY(mvm, 2048 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2049 ba_notif->sta_addr, ba_notif->sta_id); 2050 2051 IWL_DEBUG_TX_REPLY(mvm, 2052 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2053 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2054 le64_to_cpu(ba_notif->bitmap), txq, index, 2055 ba_notif->txed, ba_notif->txed_2_done); 2056 2057 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2058 ba_notif->reduced_txp); 2059 } 2060 2061 /* 2062 * Note that there are transports that buffer frames before they reach 2063 * the firmware. This means that after flush_tx_path is called, the 2064 * queue might not be empty. The race-free way to handle this is to: 2065 * 1) set the station as draining 2066 * 2) flush the Tx path 2067 * 3) wait for the transport queues to be empty 2068 */ 2069 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2070 { 2071 int ret; 2072 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2073 .queues_ctl = cpu_to_le32(tfd_msk), 2074 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2075 }; 2076 2077 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2078 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2079 sizeof(flush_cmd), &flush_cmd); 2080 if (ret) 2081 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2082 return ret; 2083 } 2084 2085 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2086 { 2087 int ret; 2088 struct iwl_tx_path_flush_cmd_rsp *rsp; 2089 struct iwl_tx_path_flush_cmd flush_cmd = { 2090 .sta_id = cpu_to_le32(sta_id), 2091 .tid_mask = cpu_to_le16(tids), 2092 }; 2093 2094 struct iwl_host_cmd cmd = { 2095 .id = TXPATH_FLUSH, 2096 .len = { sizeof(flush_cmd), }, 2097 .data = { &flush_cmd, }, 2098 }; 2099 2100 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2101 2102 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2103 cmd.flags |= CMD_WANT_SKB; 2104 2105 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2106 sta_id, tids); 2107 2108 ret = iwl_mvm_send_cmd(mvm, &cmd); 2109 2110 if (ret) { 2111 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2112 return ret; 2113 } 2114 2115 if (cmd.flags & CMD_WANT_SKB) { 2116 int i; 2117 int num_flushed_queues; 2118 2119 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2120 ret = -EIO; 2121 goto free_rsp; 2122 } 2123 2124 rsp = (void *)cmd.resp_pkt->data; 2125 2126 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2127 "sta_id %d != rsp_sta_id %d", 2128 sta_id, le16_to_cpu(rsp->sta_id))) { 2129 ret = -EIO; 2130 goto free_rsp; 2131 } 2132 2133 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2134 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2135 "num_flushed_queues %d", num_flushed_queues)) { 2136 ret = -EIO; 2137 goto free_rsp; 2138 } 2139 2140 for (i = 0; i < num_flushed_queues; i++) { 2141 struct ieee80211_tx_info tx_info = {}; 2142 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2143 int tid = le16_to_cpu(queue_info->tid); 2144 int read_before = le16_to_cpu(queue_info->read_before_flush); 2145 int read_after = le16_to_cpu(queue_info->read_after_flush); 2146 int queue_num = le16_to_cpu(queue_info->queue_num); 2147 2148 if (tid == IWL_MGMT_TID) 2149 tid = IWL_MAX_TID_COUNT; 2150 2151 IWL_DEBUG_TX_QUEUES(mvm, 2152 "tid %d queue_id %d read-before %d read-after %d\n", 2153 tid, queue_num, read_before, read_after); 2154 2155 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2156 &tx_info, 0, true); 2157 } 2158 free_rsp: 2159 iwl_free_resp(&cmd); 2160 } 2161 return ret; 2162 } 2163 2164 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal) 2165 { 2166 struct iwl_mvm_int_sta *int_sta = sta; 2167 struct iwl_mvm_sta *mvm_sta = sta; 2168 2169 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != 2170 offsetof(struct iwl_mvm_sta, sta_id)); 2171 2172 if (iwl_mvm_has_new_tx_api(mvm)) 2173 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xffff); 2174 2175 if (internal) 2176 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk); 2177 2178 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk); 2179 } 2180