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