1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2/* 3 * Copyright (C) 2012-2014, 2018-2024 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH 6 */ 7#include <linux/ieee80211.h> 8#include <linux/etherdevice.h> 9#include <linux/tcp.h> 10#include <net/gso.h> 11#include <net/ip.h> 12#include <net/ipv6.h> 13 14#include "iwl-trans.h" 15#include "iwl-eeprom-parse.h" 16#include "mvm.h" 17#include "sta.h" 18#include "time-sync.h" 19 20static void 21iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 22 u16 tid, u16 ssn) 23{ 24 struct iwl_fw_dbg_trigger_tlv *trig; 25 struct iwl_fw_dbg_trigger_ba *ba_trig; 26 27 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA); 28 if (!trig) 29 return; 30 31 ba_trig = (void *)trig->data; 32 33 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 34 return; 35 36 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 37 "BAR sent to %pM, tid %d, ssn %d", 38 addr, tid, ssn); 39} 40 41#define OPT_HDR(type, skb, off) \ 42 (type *)(skb_network_header(skb) + (off)) 43 44static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 45 struct ieee80211_tx_info *info, 46 bool amsdu) 47{ 48 struct ieee80211_hdr *hdr = (void *)skb->data; 49 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 50 u16 offload_assist = 0; 51#if IS_ENABLED(CONFIG_INET) 52 u8 protocol = 0; 53 54 /* Do not compute checksum if already computed */ 55 if (skb->ip_summed != CHECKSUM_PARTIAL) 56 goto out; 57 58 /* We do not expect to be requested to csum stuff we do not support */ 59 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 60 (skb->protocol != htons(ETH_P_IP) && 61 skb->protocol != htons(ETH_P_IPV6)), 62 "No support for requested checksum\n")) { 63 skb_checksum_help(skb); 64 goto out; 65 } 66 67 if (skb->protocol == htons(ETH_P_IP)) { 68 protocol = ip_hdr(skb)->protocol; 69 } else { 70#if IS_ENABLED(CONFIG_IPV6) 71 struct ipv6hdr *ipv6h = 72 (struct ipv6hdr *)skb_network_header(skb); 73 unsigned int off = sizeof(*ipv6h); 74 75 protocol = ipv6h->nexthdr; 76 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 77 struct ipv6_opt_hdr *hp; 78 79 /* only supported extension headers */ 80 if (protocol != NEXTHDR_ROUTING && 81 protocol != NEXTHDR_HOP && 82 protocol != NEXTHDR_DEST) { 83 skb_checksum_help(skb); 84 goto out; 85 } 86 87 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 88 protocol = hp->nexthdr; 89 off += ipv6_optlen(hp); 90 } 91 /* if we get here - protocol now should be TCP/UDP */ 92#endif 93 } 94 95 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 96 WARN_ON_ONCE(1); 97 skb_checksum_help(skb); 98 goto out; 99 } 100 101 /* enable L4 csum */ 102 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 103 104 /* 105 * Set offset to IP header (snap). 106 * We don't support tunneling so no need to take care of inner header. 107 * Size is in words. 108 */ 109 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 110 111 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 112 if (skb->protocol == htons(ETH_P_IP) && amsdu) { 113 ip_hdr(skb)->check = 0; 114 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 115 } 116 117 /* reset UDP/TCP header csum */ 118 if (protocol == IPPROTO_TCP) 119 tcp_hdr(skb)->check = 0; 120 else 121 udp_hdr(skb)->check = 0; 122 123out: 124#endif 125 /* 126 * mac header len should include IV, size is in words unless 127 * the IV is added by the firmware like in WEP. 128 * In new Tx API, the IV is always added by the firmware. 129 */ 130 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 131 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 132 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 133 mh_len += info->control.hw_key->iv_len; 134 mh_len /= 2; 135 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 136 137 if (amsdu) 138 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 139 else if (ieee80211_hdrlen(hdr->frame_control) % 4) 140 /* padding is inserted later in transport */ 141 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 142 143 return offload_assist; 144} 145 146/* 147 * Sets most of the Tx cmd's fields 148 */ 149void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 150 struct iwl_tx_cmd *tx_cmd, 151 struct ieee80211_tx_info *info, u8 sta_id) 152{ 153 struct ieee80211_hdr *hdr = (void *)skb->data; 154 __le16 fc = hdr->frame_control; 155 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 156 u32 len = skb->len + FCS_LEN; 157 bool amsdu = false; 158 u8 ac; 159 160 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) || 161 (ieee80211_is_probe_resp(fc) && 162 !is_multicast_ether_addr(hdr->addr1))) 163 tx_flags |= TX_CMD_FLG_ACK; 164 else 165 tx_flags &= ~TX_CMD_FLG_ACK; 166 167 if (ieee80211_is_probe_resp(fc)) 168 tx_flags |= TX_CMD_FLG_TSF; 169 170 if (ieee80211_has_morefrags(fc)) 171 tx_flags |= TX_CMD_FLG_MORE_FRAG; 172 173 if (ieee80211_is_data_qos(fc)) { 174 u8 *qc = ieee80211_get_qos_ctl(hdr); 175 tx_cmd->tid_tspec = qc[0] & 0xf; 176 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 177 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 178 } else if (ieee80211_is_back_req(fc)) { 179 struct ieee80211_bar *bar = (void *)skb->data; 180 u16 control = le16_to_cpu(bar->control); 181 u16 ssn = le16_to_cpu(bar->start_seq_num); 182 183 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 184 tx_cmd->tid_tspec = (control & 185 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 186 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 187 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 188 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 189 ssn); 190 } else { 191 if (ieee80211_is_data(fc)) 192 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 193 else 194 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT; 195 196 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 197 tx_flags |= TX_CMD_FLG_SEQ_CTL; 198 else 199 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 200 } 201 202 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */ 203 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 204 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 205 else 206 ac = tid_to_mac80211_ac[0]; 207 208 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 209 TX_CMD_FLG_BT_PRIO_POS; 210 211 if (ieee80211_is_mgmt(fc)) { 212 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 213 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 214 else if (ieee80211_is_action(fc)) 215 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 216 else 217 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 218 219 /* The spec allows Action frames in A-MPDU, we don't support 220 * it 221 */ 222 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 223 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 224 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 225 } else { 226 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 227 } 228 229 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 230 !is_multicast_ether_addr(hdr->addr1)) 231 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 232 233 if (fw_has_capa(&mvm->fw->ucode_capa, 234 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 235 ieee80211_action_contains_tpc(skb)) 236 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 237 238 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 239 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 240 tx_cmd->len = cpu_to_le16((u16)skb->len); 241 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 242 tx_cmd->sta_id = sta_id; 243 244 tx_cmd->offload_assist = 245 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu)); 246} 247 248static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, 249 struct ieee80211_tx_info *info, 250 struct ieee80211_sta *sta, __le16 fc) 251{ 252 if (info->band == NL80211_BAND_2GHZ && 253 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 254 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 255 256 if (sta && ieee80211_is_data(fc)) { 257 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 258 259 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS; 260 } 261 262 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 263} 264 265static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm, 266 struct ieee80211_tx_info *info) 267{ 268 struct ieee80211_tx_rate *rate = &info->control.rates[0]; 269 u32 result; 270 271 /* 272 * we only care about legacy/HT/VHT so far, so we can 273 * build in v1 and use iwl_new_rate_from_v1() 274 */ 275 276 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { 277 u8 mcs = ieee80211_rate_get_vht_mcs(rate); 278 u8 nss = ieee80211_rate_get_vht_nss(rate); 279 280 result = RATE_MCS_VHT_MSK_V1; 281 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK); 282 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK); 283 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 284 result |= RATE_MCS_SGI_MSK_V1; 285 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 286 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 287 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 288 result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1); 289 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 290 result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1); 291 } else if (rate->flags & IEEE80211_TX_RC_MCS) { 292 result = RATE_MCS_HT_MSK_V1; 293 result |= u32_encode_bits(rate->idx, 294 RATE_HT_MCS_RATE_CODE_MSK_V1 | 295 RATE_HT_MCS_NSS_MSK_V1); 296 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 297 result |= RATE_MCS_SGI_MSK_V1; 298 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 299 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 300 if (info->flags & IEEE80211_TX_CTL_LDPC) 301 result |= RATE_MCS_LDPC_MSK_V1; 302 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC)) 303 result |= RATE_MCS_STBC_MSK; 304 } else { 305 return 0; 306 } 307 308 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6) 309 return iwl_new_rate_from_v1(result); 310 return result; 311} 312 313static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 314 struct ieee80211_tx_info *info, 315 struct ieee80211_sta *sta, __le16 fc) 316{ 317 int rate_idx = -1; 318 u8 rate_plcp; 319 u32 rate_flags = 0; 320 bool is_cck; 321 322 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) { 323 u32 result = iwl_mvm_get_inject_tx_rate(mvm, info); 324 325 if (result) 326 return result; 327 rate_idx = info->control.rates[0].idx; 328 } else if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { 329 /* info->control is only relevant for non HW rate control */ 330 331 /* HT rate doesn't make sense for a non data frame */ 332 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && 333 !ieee80211_is_data(fc), 334 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", 335 info->control.rates[0].flags, 336 info->control.rates[0].idx, 337 le16_to_cpu(fc), 338 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 339 340 rate_idx = info->control.rates[0].idx; 341 342 /* For non 2 GHZ band, remap mac80211 rate indices into driver 343 * indices. 344 */ 345 if (info->band != NL80211_BAND_2GHZ || 346 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE)) 347 rate_idx += IWL_FIRST_OFDM_RATE; 348 349 /* For 2.4 GHZ band, check that there is no need to remap */ 350 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 351 } 352 353 /* if the rate isn't a well known legacy rate, take the lowest one */ 354 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 355 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm, 356 info, 357 info->control.vif); 358 359 /* Get PLCP rate for tx_cmd->rate_n_flags */ 360 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx); 361 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE); 362 363 /* Set CCK or OFDM flag */ 364 if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) { 365 if (!is_cck) 366 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK; 367 else 368 rate_flags |= RATE_MCS_CCK_MSK; 369 } else if (is_cck) { 370 rate_flags |= RATE_MCS_CCK_MSK_V1; 371 } 372 373 return (u32)rate_plcp | rate_flags; 374} 375 376static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 377 struct ieee80211_tx_info *info, 378 struct ieee80211_sta *sta, __le16 fc) 379{ 380 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) | 381 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 382} 383 384/* 385 * Sets the fields in the Tx cmd that are rate related 386 */ 387void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 388 struct ieee80211_tx_info *info, 389 struct ieee80211_sta *sta, __le16 fc) 390{ 391 /* Set retry limit on RTS packets */ 392 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 393 394 /* Set retry limit on DATA packets and Probe Responses*/ 395 if (ieee80211_is_probe_resp(fc)) { 396 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 397 tx_cmd->rts_retry_limit = 398 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 399 } else if (ieee80211_is_back_req(fc)) { 400 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 401 } else { 402 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 403 } 404 405 /* 406 * for data packets, rate info comes from the table inside the fw. This 407 * table is controlled by LINK_QUALITY commands 408 */ 409 410 if (likely(ieee80211_is_data(fc) && sta && 411 !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) { 412 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 413 414 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 415 tx_cmd->initial_rate_index = 0; 416 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 417 return; 418 } 419 } else if (ieee80211_is_back_req(fc)) { 420 tx_cmd->tx_flags |= 421 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 422 } 423 424 /* Set the rate in the TX cmd */ 425 tx_cmd->rate_n_flags = 426 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 427} 428 429static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 430 u8 *crypto_hdr) 431{ 432 struct ieee80211_key_conf *keyconf = info->control.hw_key; 433 u64 pn; 434 435 pn = atomic64_inc_return(&keyconf->tx_pn); 436 crypto_hdr[0] = pn; 437 crypto_hdr[2] = 0; 438 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 439 crypto_hdr[1] = pn >> 8; 440 crypto_hdr[4] = pn >> 16; 441 crypto_hdr[5] = pn >> 24; 442 crypto_hdr[6] = pn >> 32; 443 crypto_hdr[7] = pn >> 40; 444} 445 446/* 447 * Sets the fields in the Tx cmd that are crypto related 448 */ 449static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 450 struct ieee80211_tx_info *info, 451 struct iwl_tx_cmd *tx_cmd, 452 struct sk_buff *skb_frag, 453 int hdrlen) 454{ 455 struct ieee80211_key_conf *keyconf = info->control.hw_key; 456 u8 *crypto_hdr = skb_frag->data + hdrlen; 457 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 458 u64 pn; 459 460 switch (keyconf->cipher) { 461 case WLAN_CIPHER_SUITE_CCMP: 462 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 463 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 464 break; 465 466 case WLAN_CIPHER_SUITE_TKIP: 467 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 468 pn = atomic64_inc_return(&keyconf->tx_pn); 469 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 470 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 471 break; 472 473 case WLAN_CIPHER_SUITE_WEP104: 474 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 475 fallthrough; 476 case WLAN_CIPHER_SUITE_WEP40: 477 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 478 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 479 TX_CMD_SEC_WEP_KEY_IDX_MSK); 480 481 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 482 break; 483 case WLAN_CIPHER_SUITE_GCMP: 484 case WLAN_CIPHER_SUITE_GCMP_256: 485 type = TX_CMD_SEC_GCMP; 486 fallthrough; 487 case WLAN_CIPHER_SUITE_CCMP_256: 488 /* TODO: Taking the key from the table might introduce a race 489 * when PTK rekeying is done, having an old packets with a PN 490 * based on the old key but the message encrypted with a new 491 * one. 492 * Need to handle this. 493 */ 494 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 495 tx_cmd->key[0] = keyconf->hw_key_idx; 496 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 497 break; 498 default: 499 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 500 } 501} 502 503static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen, 504 const u8 *addr3_override) 505{ 506 struct ieee80211_hdr *out_hdr = cmd; 507 508 memcpy(cmd, hdr, hdrlen); 509 if (addr3_override) 510 memcpy(out_hdr->addr3, addr3_override, ETH_ALEN); 511} 512 513/* 514 * Allocates and sets the Tx cmd the driver data pointers in the skb 515 */ 516static struct iwl_device_tx_cmd * 517iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 518 struct ieee80211_tx_info *info, int hdrlen, 519 struct ieee80211_sta *sta, u8 sta_id, 520 const u8 *addr3_override) 521{ 522 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 523 struct iwl_device_tx_cmd *dev_cmd; 524 struct iwl_tx_cmd *tx_cmd; 525 526 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 527 528 if (unlikely(!dev_cmd)) 529 return NULL; 530 531 dev_cmd->hdr.cmd = TX_CMD; 532 533 if (iwl_mvm_has_new_tx_api(mvm)) { 534 u32 rate_n_flags = 0; 535 u16 flags = 0; 536 struct iwl_mvm_sta *mvmsta = sta ? 537 iwl_mvm_sta_from_mac80211(sta) : NULL; 538 bool amsdu = false; 539 540 if (ieee80211_is_data_qos(hdr->frame_control)) { 541 u8 *qc = ieee80211_get_qos_ctl(hdr); 542 543 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 544 } 545 546 if (!info->control.hw_key) 547 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 548 549 /* 550 * For data and mgmt packets rate info comes from the fw. Only 551 * set rate/antenna for injected frames with fixed rate, or 552 * when no sta is given. 553 */ 554 if (unlikely(!sta || 555 info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) { 556 flags |= IWL_TX_FLAGS_CMD_RATE; 557 rate_n_flags = 558 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 559 hdr->frame_control); 560 } else if (!ieee80211_is_data(hdr->frame_control) || 561 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 562 /* These are important frames */ 563 flags |= IWL_TX_FLAGS_HIGH_PRI; 564 } 565 566 if (mvm->trans->trans_cfg->device_family >= 567 IWL_DEVICE_FAMILY_AX210) { 568 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 569 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, 570 info, amsdu); 571 572 cmd->offload_assist = cpu_to_le32(offload_assist); 573 574 /* Total # bytes to be transmitted */ 575 cmd->len = cpu_to_le16((u16)skb->len); 576 577 /* Copy MAC header from skb into command buffer */ 578 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override); 579 580 cmd->flags = cpu_to_le16(flags); 581 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 582 } else { 583 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 584 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb, 585 info, amsdu); 586 587 cmd->offload_assist = cpu_to_le16(offload_assist); 588 589 /* Total # bytes to be transmitted */ 590 cmd->len = cpu_to_le16((u16)skb->len); 591 592 /* Copy MAC header from skb into command buffer */ 593 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override); 594 595 cmd->flags = cpu_to_le32(flags); 596 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 597 } 598 goto out; 599 } 600 601 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 602 603 if (info->control.hw_key) 604 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 605 606 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 607 608 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 609 610 /* Copy MAC header from skb into command buffer */ 611 iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override); 612 613out: 614 return dev_cmd; 615} 616 617static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 618 struct iwl_device_tx_cmd *cmd) 619{ 620 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 621 622 memset(&skb_info->status, 0, sizeof(skb_info->status)); 623 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 624 625 skb_info->driver_data[1] = cmd; 626} 627 628static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 629 struct iwl_mvm_vif_link_info *link, 630 struct ieee80211_tx_info *info, 631 struct sk_buff *skb) 632{ 633 struct ieee80211_hdr *hdr = (void *)skb->data; 634 __le16 fc = hdr->frame_control; 635 636 switch (info->control.vif->type) { 637 case NL80211_IFTYPE_AP: 638 case NL80211_IFTYPE_ADHOC: 639 /* 640 * Non-bufferable frames use the broadcast station, thus they 641 * use the probe queue. 642 * Also take care of the case where we send a deauth to a 643 * station that we don't have, or similarly an association 644 * response (with non-success status) for a station we can't 645 * accept. 646 * Also, disassociate frames might happen, particular with 647 * reason 7 ("Class 3 frame received from nonassociated STA"). 648 */ 649 if (ieee80211_is_mgmt(fc) && 650 (!ieee80211_is_bufferable_mmpdu(skb) || 651 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 652 return link->mgmt_queue; 653 654 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 655 is_multicast_ether_addr(hdr->addr1)) 656 return link->cab_queue; 657 658 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 659 "fc=0x%02x", le16_to_cpu(fc)); 660 return link->mgmt_queue; 661 case NL80211_IFTYPE_P2P_DEVICE: 662 if (ieee80211_is_mgmt(fc)) 663 return mvm->p2p_dev_queue; 664 665 WARN_ON_ONCE(1); 666 return mvm->p2p_dev_queue; 667 default: 668 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 669 return -1; 670 } 671} 672 673static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 674 struct sk_buff *skb) 675{ 676 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 677 struct iwl_mvm_vif *mvmvif = 678 iwl_mvm_vif_from_mac80211(info->control.vif); 679 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 680 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 681 struct iwl_probe_resp_data *resp_data; 682 const u8 *ie; 683 u8 *pos; 684 u8 match[] = { 685 (WLAN_OUI_WFA >> 16) & 0xff, 686 (WLAN_OUI_WFA >> 8) & 0xff, 687 WLAN_OUI_WFA & 0xff, 688 WLAN_OUI_TYPE_WFA_P2P, 689 }; 690 691 rcu_read_lock(); 692 693 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data); 694 if (!resp_data) 695 goto out; 696 697 if (!resp_data->notif.noa_active) 698 goto out; 699 700 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 701 mgmt->u.probe_resp.variable, 702 skb->len - base_len, 703 match, 4, 2); 704 if (!ie) { 705 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 706 goto out; 707 } 708 709 if (skb_tailroom(skb) < resp_data->noa_len) { 710 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 711 IWL_ERR(mvm, 712 "Failed to reallocate probe resp\n"); 713 goto out; 714 } 715 } 716 717 pos = skb_put(skb, resp_data->noa_len); 718 719 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 720 /* Set length of IE body (not including ID and length itself) */ 721 *pos++ = resp_data->noa_len - 2; 722 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 723 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 724 *pos++ = WLAN_OUI_WFA & 0xff; 725 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 726 727 memcpy(pos, &resp_data->notif.noa_attr, 728 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 729 730out: 731 rcu_read_unlock(); 732} 733 734int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 735{ 736 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 737 struct ieee80211_tx_info info; 738 struct iwl_device_tx_cmd *dev_cmd; 739 u8 sta_id; 740 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 741 __le16 fc = hdr->frame_control; 742 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 743 IEEE80211_TX_CTL_TX_OFFCHAN; 744 int queue = -1; 745 746 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 747 return -1; 748 749 memcpy(&info, skb->cb, sizeof(info)); 750 751 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 752 return -1; 753 754 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 755 return -1; 756 757 if (info.control.vif) { 758 struct iwl_mvm_vif *mvmvif = 759 iwl_mvm_vif_from_mac80211(info.control.vif); 760 761 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 762 info.control.vif->type == NL80211_IFTYPE_AP || 763 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 764 u32 link_id = u32_get_bits(info.control.flags, 765 IEEE80211_TX_CTRL_MLO_LINK); 766 struct iwl_mvm_vif_link_info *link; 767 768 if (link_id == IEEE80211_LINK_UNSPECIFIED) { 769 if (info.control.vif->active_links) 770 link_id = ffs(info.control.vif->active_links) - 1; 771 else 772 link_id = 0; 773 } 774 775 link = mvmvif->link[link_id]; 776 if (WARN_ON(!link)) 777 return -1; 778 779 if (!ieee80211_is_data(hdr->frame_control)) 780 sta_id = link->bcast_sta.sta_id; 781 else 782 sta_id = link->mcast_sta.sta_id; 783 784 queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info, 785 skb); 786 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 787 queue = mvm->snif_queue; 788 sta_id = mvm->snif_sta.sta_id; 789 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 790 offchannel) { 791 /* 792 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 793 * that can be used in 2 different types of vifs, P2P & 794 * STATION. 795 * P2P uses the offchannel queue. 796 * STATION (HS2.0) uses the auxiliary context of the FW, 797 * and hence needs to be sent on the aux queue. 798 */ 799 sta_id = mvm->aux_sta.sta_id; 800 queue = mvm->aux_queue; 801 } 802 } 803 804 if (queue < 0) { 805 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 806 return -1; 807 } 808 809 if (unlikely(ieee80211_is_probe_resp(fc))) 810 iwl_mvm_probe_resp_set_noa(mvm, skb); 811 812 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 813 814 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id, 815 NULL); 816 if (!dev_cmd) 817 return -1; 818 819 /* From now on, we cannot access info->control */ 820 iwl_mvm_skb_prepare_status(skb, dev_cmd); 821 822 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 823 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 824 return -1; 825 } 826 827 return 0; 828} 829 830unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 831 struct ieee80211_sta *sta, unsigned int tid) 832{ 833 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 834 u8 ac = tid_to_mac80211_ac[tid]; 835 enum nl80211_band band; 836 unsigned int txf; 837 unsigned int val; 838 int lmac; 839 840 /* For HE redirect to trigger based fifos */ 841 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 842 ac += 4; 843 844 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 845 846 /* 847 * Don't send an AMSDU that will be longer than the TXF. 848 * Add a security margin of 256 for the TX command + headers. 849 * We also want to have the start of the next packet inside the 850 * fifo to be able to send bursts. 851 */ 852 val = mvmsta->max_amsdu_len; 853 854 if (hweight16(sta->valid_links) <= 1) { 855 if (sta->valid_links) { 856 struct ieee80211_bss_conf *link_conf; 857 unsigned int link = ffs(sta->valid_links) - 1; 858 859 rcu_read_lock(); 860 link_conf = rcu_dereference(mvmsta->vif->link_conf[link]); 861 if (WARN_ON(!link_conf)) 862 band = NL80211_BAND_2GHZ; 863 else 864 band = link_conf->chandef.chan->band; 865 rcu_read_unlock(); 866 } else { 867 band = mvmsta->vif->bss_conf.chandef.chan->band; 868 } 869 870 lmac = iwl_mvm_get_lmac_id(mvm, band); 871 } else if (fw_has_capa(&mvm->fw->ucode_capa, 872 IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) { 873 /* for real MLO restrict to both LMACs if they exist */ 874 lmac = IWL_LMAC_5G_INDEX; 875 val = min_t(unsigned int, val, 876 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 877 lmac = IWL_LMAC_24G_INDEX; 878 } else { 879 lmac = IWL_LMAC_24G_INDEX; 880 } 881 882 return min_t(unsigned int, val, 883 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 884} 885 886#ifdef CONFIG_INET 887 888static int 889iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 890 netdev_features_t netdev_flags, 891 struct sk_buff_head *mpdus_skb) 892{ 893 struct sk_buff *tmp, *next; 894 struct ieee80211_hdr *hdr = (void *)skb->data; 895 char cb[sizeof(skb->cb)]; 896 u16 i = 0; 897 unsigned int tcp_payload_len; 898 unsigned int mss = skb_shinfo(skb)->gso_size; 899 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 900 bool qos = ieee80211_is_data_qos(hdr->frame_control); 901 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 902 903 skb_shinfo(skb)->gso_size = num_subframes * mss; 904 memcpy(cb, skb->cb, sizeof(cb)); 905 906 next = skb_gso_segment(skb, netdev_flags); 907 skb_shinfo(skb)->gso_size = mss; 908 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 909 if (WARN_ON_ONCE(IS_ERR(next))) 910 return -EINVAL; 911 else if (next) 912 consume_skb(skb); 913 914 skb_list_walk_safe(next, tmp, next) { 915 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 916 /* 917 * Compute the length of all the data added for the A-MSDU. 918 * This will be used to compute the length to write in the TX 919 * command. We have: SNAP + IP + TCP for n -1 subframes and 920 * ETH header for n subframes. 921 */ 922 tcp_payload_len = skb_tail_pointer(tmp) - 923 skb_transport_header(tmp) - 924 tcp_hdrlen(tmp) + tmp->data_len; 925 926 if (ipv4) 927 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 928 929 if (tcp_payload_len > mss) { 930 skb_shinfo(tmp)->gso_size = mss; 931 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 : 932 SKB_GSO_TCPV6; 933 } else { 934 if (qos) { 935 u8 *qc; 936 937 if (ipv4) 938 ip_send_check(ip_hdr(tmp)); 939 940 qc = ieee80211_get_qos_ctl((void *)tmp->data); 941 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 942 } 943 skb_shinfo(tmp)->gso_size = 0; 944 } 945 946 skb_mark_not_on_list(tmp); 947 __skb_queue_tail(mpdus_skb, tmp); 948 i++; 949 } 950 951 return 0; 952} 953 954static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 955 struct ieee80211_tx_info *info, 956 struct ieee80211_sta *sta, 957 struct sk_buff_head *mpdus_skb) 958{ 959 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 960 struct ieee80211_hdr *hdr = (void *)skb->data; 961 unsigned int mss = skb_shinfo(skb)->gso_size; 962 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 963 u16 snap_ip_tcp, pad; 964 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 965 u8 tid; 966 967 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 968 tcp_hdrlen(skb); 969 970 if (!mvmsta->max_amsdu_len || 971 !ieee80211_is_data_qos(hdr->frame_control) || 972 !mvmsta->amsdu_enabled) 973 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 974 975 /* 976 * Do not build AMSDU for IPv6 with extension headers. 977 * ask stack to segment and checkum the generated MPDUs for us. 978 */ 979 if (skb->protocol == htons(ETH_P_IPV6) && 980 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 981 IPPROTO_TCP) { 982 netdev_flags &= ~NETIF_F_CSUM_MASK; 983 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 984 } 985 986 tid = ieee80211_get_tid(hdr); 987 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 988 return -EINVAL; 989 990 /* 991 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 992 * during an BA session. 993 */ 994 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 995 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 996 !(mvmsta->amsdu_enabled & BIT(tid))) 997 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 998 999 /* 1000 * Take the min of ieee80211 station and mvm station 1001 */ 1002 max_amsdu_len = 1003 min_t(unsigned int, sta->cur->max_amsdu_len, 1004 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 1005 1006 /* 1007 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 1008 * supported. This is a spec requirement (IEEE 802.11-2015 1009 * section 8.7.3 NOTE 3). 1010 */ 1011 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1012 !sta->deflink.vht_cap.vht_supported) 1013 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 1014 1015 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 1016 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 1017 pad = (4 - subf_len) & 0x3; 1018 1019 /* 1020 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 1021 * N * subf_len + (N - 1) * pad. 1022 */ 1023 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 1024 1025 if (sta->max_amsdu_subframes && 1026 num_subframes > sta->max_amsdu_subframes) 1027 num_subframes = sta->max_amsdu_subframes; 1028 1029 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1030 tcp_hdrlen(skb) + skb->data_len; 1031 1032 /* 1033 * Make sure we have enough TBs for the A-MSDU: 1034 * 2 for each subframe 1035 * 1 more for each fragment 1036 * 1 more for the potential data in the header 1037 */ 1038 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 1039 mvm->trans->max_skb_frags) 1040 num_subframes = 1; 1041 1042 if (num_subframes > 1) 1043 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1044 1045 /* This skb fits in one single A-MSDU */ 1046 if (num_subframes * mss >= tcp_payload_len) { 1047 __skb_queue_tail(mpdus_skb, skb); 1048 return 0; 1049 } 1050 1051 /* 1052 * Trick the segmentation function to make it 1053 * create SKBs that can fit into one A-MSDU. 1054 */ 1055 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 1056 mpdus_skb); 1057} 1058#else /* CONFIG_INET */ 1059static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 1060 struct ieee80211_tx_info *info, 1061 struct ieee80211_sta *sta, 1062 struct sk_buff_head *mpdus_skb) 1063{ 1064 /* Impossible to get TSO with CONFIG_INET */ 1065 WARN_ON(1); 1066 1067 return -1; 1068} 1069#endif 1070 1071/* Check if there are any timed-out TIDs on a given shared TXQ */ 1072static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1073{ 1074 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1075 unsigned long now = jiffies; 1076 int tid; 1077 1078 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1079 return false; 1080 1081 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1082 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1083 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1084 return true; 1085 } 1086 1087 return false; 1088} 1089 1090static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1091 struct iwl_mvm_sta *mvmsta, 1092 int airtime) 1093{ 1094 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1095 struct iwl_mvm_tcm_mac *mdata; 1096 1097 if (mac >= NUM_MAC_INDEX_DRIVER) 1098 return; 1099 1100 mdata = &mvm->tcm.data[mac]; 1101 1102 if (mvm->tcm.paused) 1103 return; 1104 1105 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1106 schedule_delayed_work(&mvm->tcm.work, 0); 1107 1108 mdata->tx.airtime += airtime; 1109} 1110 1111static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1112 struct iwl_mvm_sta *mvmsta, int tid) 1113{ 1114 u32 ac = tid_to_mac80211_ac[tid]; 1115 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1116 struct iwl_mvm_tcm_mac *mdata; 1117 1118 if (mac >= NUM_MAC_INDEX_DRIVER) 1119 return -EINVAL; 1120 1121 mdata = &mvm->tcm.data[mac]; 1122 1123 mdata->tx.pkts[ac]++; 1124 1125 return 0; 1126} 1127 1128/* 1129 * Sets the fields in the Tx cmd that are crypto related. 1130 * 1131 * This function must be called with BHs disabled. 1132 */ 1133static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1134 struct ieee80211_tx_info *info, 1135 struct ieee80211_sta *sta, 1136 const u8 *addr3_override) 1137{ 1138 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1139 struct iwl_mvm_sta *mvmsta; 1140 struct iwl_device_tx_cmd *dev_cmd; 1141 __le16 fc; 1142 u16 seq_number = 0; 1143 u8 tid = IWL_MAX_TID_COUNT; 1144 u16 txq_id; 1145 bool is_ampdu = false; 1146 int hdrlen; 1147 1148 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1149 fc = hdr->frame_control; 1150 hdrlen = ieee80211_hdrlen(fc); 1151 1152 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1153 return -1; 1154 1155 if (WARN_ON_ONCE(!mvmsta)) 1156 return -1; 1157 1158 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1159 return -1; 1160 1161 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he) 1162 return -1; 1163 1164 if (unlikely(ieee80211_is_probe_resp(fc))) 1165 iwl_mvm_probe_resp_set_noa(mvm, skb); 1166 1167 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1168 sta, mvmsta->deflink.sta_id, 1169 addr3_override); 1170 if (!dev_cmd) 1171 goto drop; 1172 1173 /* 1174 * we handle that entirely ourselves -- for uAPSD the firmware 1175 * will always send a notification, and for PS-Poll responses 1176 * we'll notify mac80211 when getting frame status 1177 */ 1178 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1179 1180 spin_lock(&mvmsta->lock); 1181 1182 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1183 * the conditions of !ieee80211_is_qos_nullfunc(fc) and 1184 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID 1185 */ 1186 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1187 tid = ieee80211_get_tid(hdr); 1188 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1189 goto drop_unlock_sta; 1190 1191 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1192 if (WARN_ONCE(is_ampdu && 1193 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1194 "Invalid internal agg state %d for TID %d", 1195 mvmsta->tid_data[tid].state, tid)) 1196 goto drop_unlock_sta; 1197 1198 seq_number = mvmsta->tid_data[tid].seq_number; 1199 seq_number &= IEEE80211_SCTL_SEQ; 1200 1201 if (!iwl_mvm_has_new_tx_api(mvm)) { 1202 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1203 1204 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1205 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1206 /* update the tx_cmd hdr as it was already copied */ 1207 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1208 } 1209 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) && 1210 !ieee80211_is_nullfunc(fc)) { 1211 tid = IWL_TID_NON_QOS; 1212 } 1213 1214 txq_id = mvmsta->tid_data[tid].txq_id; 1215 1216 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1217 1218 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1219 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1220 spin_unlock(&mvmsta->lock); 1221 return -1; 1222 } 1223 1224 if (!iwl_mvm_has_new_tx_api(mvm)) { 1225 /* Keep track of the time of the last frame for this RA/TID */ 1226 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1227 1228 /* 1229 * If we have timed-out TIDs - schedule the worker that will 1230 * reconfig the queues and update them 1231 * 1232 * Note that the no lock is taken here in order to not serialize 1233 * the TX flow. This isn't dangerous because scheduling 1234 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1235 * schedule it due to some race condition then next TX we get 1236 * here we will. 1237 */ 1238 if (unlikely(mvm->queue_info[txq_id].status == 1239 IWL_MVM_QUEUE_SHARED && 1240 iwl_mvm_txq_should_update(mvm, txq_id))) 1241 schedule_work(&mvm->add_stream_wk); 1242 } 1243 1244 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1245 mvmsta->deflink.sta_id, tid, txq_id, 1246 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1247 1248 /* From now on, we cannot access info->control */ 1249 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1250 1251 /* 1252 * The IV is introduced by the HW for new tx api, and it is not present 1253 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the 1254 * IV for those devices. 1255 */ 1256 if (ieee80211_is_data(fc)) 1257 iwl_mvm_mei_tx_copy_to_csme(mvm, skb, 1258 info->control.hw_key && 1259 !iwl_mvm_has_new_tx_api(mvm) ? 1260 info->control.hw_key->iv_len : 0); 1261 1262 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1263 goto drop_unlock_sta; 1264 1265 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1266 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1267 1268 spin_unlock(&mvmsta->lock); 1269 1270 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1271 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1272 goto drop; 1273 1274 return 0; 1275 1276drop_unlock_sta: 1277 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1278 spin_unlock(&mvmsta->lock); 1279drop: 1280 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id, 1281 tid); 1282 return -1; 1283} 1284 1285int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1286 struct ieee80211_sta *sta) 1287{ 1288 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1289 struct ieee80211_tx_info info; 1290 struct sk_buff_head mpdus_skbs; 1291 struct ieee80211_vif *vif; 1292 unsigned int payload_len; 1293 int ret; 1294 struct sk_buff *orig_skb = skb; 1295 const u8 *addr3; 1296 1297 if (WARN_ON_ONCE(!mvmsta)) 1298 return -1; 1299 1300 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1301 return -1; 1302 1303 memcpy(&info, skb->cb, sizeof(info)); 1304 1305 if (!skb_is_gso(skb)) 1306 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL); 1307 1308 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1309 tcp_hdrlen(skb) + skb->data_len; 1310 1311 if (payload_len <= skb_shinfo(skb)->gso_size) 1312 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL); 1313 1314 __skb_queue_head_init(&mpdus_skbs); 1315 1316 vif = info.control.vif; 1317 if (!vif) 1318 return -1; 1319 1320 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1321 if (ret) 1322 return ret; 1323 1324 WARN_ON(skb_queue_empty(&mpdus_skbs)); 1325 1326 /* 1327 * As described in IEEE sta 802.11-2020, table 9-30 (Address 1328 * field contents), A-MSDU address 3 should contain the BSSID 1329 * address. 1330 * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it 1331 * in the command header. We need to preserve the original 1332 * address 3 in the skb header to correctly create all the 1333 * A-MSDU subframe headers from it. 1334 */ 1335 switch (vif->type) { 1336 case NL80211_IFTYPE_STATION: 1337 addr3 = vif->cfg.ap_addr; 1338 break; 1339 case NL80211_IFTYPE_AP: 1340 addr3 = vif->addr; 1341 break; 1342 default: 1343 addr3 = NULL; 1344 break; 1345 } 1346 1347 while (!skb_queue_empty(&mpdus_skbs)) { 1348 struct ieee80211_hdr *hdr; 1349 bool amsdu; 1350 1351 skb = __skb_dequeue(&mpdus_skbs); 1352 hdr = (void *)skb->data; 1353 amsdu = ieee80211_is_data_qos(hdr->frame_control) && 1354 (*ieee80211_get_qos_ctl(hdr) & 1355 IEEE80211_QOS_CTL_A_MSDU_PRESENT); 1356 1357 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta, 1358 amsdu ? addr3 : NULL); 1359 if (ret) { 1360 /* Free skbs created as part of TSO logic that have not yet been dequeued */ 1361 __skb_queue_purge(&mpdus_skbs); 1362 /* skb here is not necessarily same as skb that entered this method, 1363 * so free it explicitly. 1364 */ 1365 if (skb == orig_skb) 1366 ieee80211_free_txskb(mvm->hw, skb); 1367 else 1368 kfree_skb(skb); 1369 /* there was error, but we consumed skb one way or another, so return 0 */ 1370 return 0; 1371 } 1372 } 1373 1374 return 0; 1375} 1376 1377static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1378 struct ieee80211_sta *sta, u8 tid) 1379{ 1380 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1381 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1382 struct ieee80211_vif *vif = mvmsta->vif; 1383 u16 normalized_ssn; 1384 1385 lockdep_assert_held(&mvmsta->lock); 1386 1387 if ((tid_data->state == IWL_AGG_ON || 1388 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1389 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1390 /* 1391 * Now that this aggregation or DQA queue is empty tell 1392 * mac80211 so it knows we no longer have frames buffered for 1393 * the station on this TID (for the TIM bitmap calculation.) 1394 */ 1395 ieee80211_sta_set_buffered(sta, tid, false); 1396 } 1397 1398 /* 1399 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1400 * to align the wrap around of ssn so we compare relevant values. 1401 */ 1402 normalized_ssn = tid_data->ssn; 1403 if (mvm->trans->trans_cfg->gen2) 1404 normalized_ssn &= 0xff; 1405 1406 if (normalized_ssn != tid_data->next_reclaimed) 1407 return; 1408 1409 switch (tid_data->state) { 1410 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1411 IWL_DEBUG_TX_QUEUES(mvm, 1412 "Can continue addBA flow ssn = next_recl = %d\n", 1413 tid_data->next_reclaimed); 1414 tid_data->state = IWL_AGG_STARTING; 1415 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1416 break; 1417 1418 case IWL_EMPTYING_HW_QUEUE_DELBA: 1419 IWL_DEBUG_TX_QUEUES(mvm, 1420 "Can continue DELBA flow ssn = next_recl = %d\n", 1421 tid_data->next_reclaimed); 1422 tid_data->state = IWL_AGG_OFF; 1423 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1424 break; 1425 1426 default: 1427 break; 1428 } 1429} 1430 1431#ifdef CONFIG_IWLWIFI_DEBUG 1432const char *iwl_mvm_get_tx_fail_reason(u32 status) 1433{ 1434#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1435#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1436 1437 switch (status & TX_STATUS_MSK) { 1438 case TX_STATUS_SUCCESS: 1439 return "SUCCESS"; 1440 TX_STATUS_POSTPONE(DELAY); 1441 TX_STATUS_POSTPONE(FEW_BYTES); 1442 TX_STATUS_POSTPONE(BT_PRIO); 1443 TX_STATUS_POSTPONE(QUIET_PERIOD); 1444 TX_STATUS_POSTPONE(CALC_TTAK); 1445 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1446 TX_STATUS_FAIL(SHORT_LIMIT); 1447 TX_STATUS_FAIL(LONG_LIMIT); 1448 TX_STATUS_FAIL(UNDERRUN); 1449 TX_STATUS_FAIL(DRAIN_FLOW); 1450 TX_STATUS_FAIL(RFKILL_FLUSH); 1451 TX_STATUS_FAIL(LIFE_EXPIRE); 1452 TX_STATUS_FAIL(DEST_PS); 1453 TX_STATUS_FAIL(HOST_ABORTED); 1454 TX_STATUS_FAIL(BT_RETRY); 1455 TX_STATUS_FAIL(STA_INVALID); 1456 TX_STATUS_FAIL(FRAG_DROPPED); 1457 TX_STATUS_FAIL(TID_DISABLE); 1458 TX_STATUS_FAIL(FIFO_FLUSHED); 1459 TX_STATUS_FAIL(SMALL_CF_POLL); 1460 TX_STATUS_FAIL(FW_DROP); 1461 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1462 } 1463 1464 return "UNKNOWN"; 1465 1466#undef TX_STATUS_FAIL 1467#undef TX_STATUS_POSTPONE 1468} 1469#endif /* CONFIG_IWLWIFI_DEBUG */ 1470 1471static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1472{ 1473 switch (chan_width) { 1474 case RATE_MCS_CHAN_WIDTH_20: 1475 return 0; 1476 case RATE_MCS_CHAN_WIDTH_40: 1477 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1478 case RATE_MCS_CHAN_WIDTH_80: 1479 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1480 case RATE_MCS_CHAN_WIDTH_160: 1481 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1482 default: 1483 return 0; 1484 } 1485} 1486 1487void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1488 enum nl80211_band band, 1489 struct ieee80211_tx_rate *r) 1490{ 1491 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1492 u32 rate = format == RATE_MCS_HT_MSK ? 1493 RATE_HT_MCS_INDEX(rate_n_flags) : 1494 rate_n_flags & RATE_MCS_CODE_MSK; 1495 1496 r->flags |= 1497 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1498 RATE_MCS_CHAN_WIDTH_MSK); 1499 1500 if (rate_n_flags & RATE_MCS_SGI_MSK) 1501 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1502 if (format == RATE_MCS_HT_MSK) { 1503 r->flags |= IEEE80211_TX_RC_MCS; 1504 r->idx = rate; 1505 } else if (format == RATE_MCS_VHT_MSK) { 1506 ieee80211_rate_set_vht(r, rate, 1507 FIELD_GET(RATE_MCS_NSS_MSK, 1508 rate_n_flags) + 1); 1509 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1510 } else if (format == RATE_MCS_HE_MSK) { 1511 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1512 * but it only matters for radiotap */ 1513 r->idx = 0; 1514 } else { 1515 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1516 band); 1517 } 1518} 1519 1520void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags, 1521 enum nl80211_band band, 1522 struct ieee80211_tx_rate *r) 1523{ 1524 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1525 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1526 1527 r->flags |= 1528 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1529 RATE_MCS_CHAN_WIDTH_MSK_V1); 1530 1531 if (rate_n_flags & RATE_MCS_SGI_MSK_V1) 1532 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1533 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 1534 r->flags |= IEEE80211_TX_RC_MCS; 1535 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 1536 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 1537 ieee80211_rate_set_vht( 1538 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1539 FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1); 1540 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1541 } else { 1542 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1543 band); 1544 } 1545} 1546 1547/* 1548 * translate ucode response to mac80211 tx status control values 1549 */ 1550static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw, 1551 u32 rate_n_flags, 1552 struct ieee80211_tx_info *info) 1553{ 1554 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1555 1556 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP, 1557 TX_CMD, 0) <= 6) 1558 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1559 1560 info->status.antenna = 1561 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1562 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, 1563 info->band, r); 1564} 1565 1566static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1567 u32 status, __le16 frame_control) 1568{ 1569 struct iwl_fw_dbg_trigger_tlv *trig; 1570 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1571 int i; 1572 1573 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1574 enum iwl_fw_ini_time_point tp = 1575 IWL_FW_INI_TIME_POINT_TX_FAILED; 1576 1577 if (ieee80211_is_action(frame_control)) 1578 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1579 1580 iwl_dbg_tlv_time_point(&mvm->fwrt, 1581 tp, NULL); 1582 return; 1583 } 1584 1585 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1586 FW_DBG_TRIGGER_TX_STATUS); 1587 if (!trig) 1588 return; 1589 1590 status_trig = (void *)trig->data; 1591 1592 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1593 /* don't collect on status 0 */ 1594 if (!status_trig->statuses[i].status) 1595 break; 1596 1597 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1598 continue; 1599 1600 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1601 "Tx status %d was received", 1602 status & TX_STATUS_MSK); 1603 break; 1604 } 1605} 1606 1607/* 1608 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1609 * @tx_resp: the Tx response from the fw (agg or non-agg) 1610 * 1611 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1612 * it can't know that everything will go well until the end of the AMPDU, it 1613 * can't know in advance the number of MPDUs that will be sent in the current 1614 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1615 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1616 * of the batch. This is why the SSN of the SCD is written at the end of the 1617 * whole struct at a variable offset. This function knows how to cope with the 1618 * variable offset and returns the SSN of the SCD. 1619 * 1620 * For 22000-series and lower, this is just 12 bits. For later, 16 bits. 1621 */ 1622static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1623 struct iwl_mvm_tx_resp *tx_resp) 1624{ 1625 u32 val = le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1626 tx_resp->frame_count); 1627 1628 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 1629 return val & 0xFFFF; 1630 return val & 0xFFF; 1631} 1632 1633static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1634 struct iwl_rx_packet *pkt) 1635{ 1636 struct ieee80211_sta *sta; 1637 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1638 int txq_id = SEQ_TO_QUEUE(sequence); 1639 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1640 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1641 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1642 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1643 struct agg_tx_status *agg_status = 1644 iwl_mvm_get_agg_status(mvm, tx_resp); 1645 u32 status = le16_to_cpu(agg_status->status); 1646 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1647 struct sk_buff_head skbs; 1648 u8 skb_freed = 0; 1649 u8 lq_color; 1650 u16 next_reclaimed, seq_ctl; 1651 bool is_ndp = false; 1652 1653 __skb_queue_head_init(&skbs); 1654 1655 if (iwl_mvm_has_new_tx_api(mvm)) 1656 txq_id = le16_to_cpu(tx_resp->tx_queue); 1657 1658 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1659 1660 /* we can free until ssn % q.n_bd not inclusive */ 1661 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false); 1662 1663 while (!skb_queue_empty(&skbs)) { 1664 struct sk_buff *skb = __skb_dequeue(&skbs); 1665 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1666 struct ieee80211_hdr *hdr = (void *)skb->data; 1667 bool flushed = false; 1668 1669 skb_freed++; 1670 1671 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1672 1673 memset(&info->status, 0, sizeof(info->status)); 1674 info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED); 1675 1676 /* inform mac80211 about what happened with the frame */ 1677 switch (status & TX_STATUS_MSK) { 1678 case TX_STATUS_SUCCESS: 1679 case TX_STATUS_DIRECT_DONE: 1680 info->flags |= IEEE80211_TX_STAT_ACK; 1681 break; 1682 case TX_STATUS_FAIL_FIFO_FLUSHED: 1683 case TX_STATUS_FAIL_DRAIN_FLOW: 1684 flushed = true; 1685 break; 1686 case TX_STATUS_FAIL_DEST_PS: 1687 /* the FW should have stopped the queue and not 1688 * return this status 1689 */ 1690 IWL_ERR_LIMIT(mvm, 1691 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1692 status, le16_to_cpu(hdr->frame_control)); 1693 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1694 break; 1695 default: 1696 break; 1697 } 1698 1699 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1700 ieee80211_is_mgmt(hdr->frame_control)) 1701 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1702 1703 /* 1704 * If we are freeing multiple frames, mark all the frames 1705 * but the first one as acked, since they were acknowledged 1706 * before 1707 * */ 1708 if (skb_freed > 1) 1709 info->flags |= IEEE80211_TX_STAT_ACK; 1710 1711 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1712 1713 info->status.rates[0].count = tx_resp->failure_frame + 1; 1714 1715 iwl_mvm_hwrate_to_tx_status(mvm->fw, 1716 le32_to_cpu(tx_resp->initial_rate), 1717 info); 1718 1719 /* Don't assign the converted initial_rate, because driver 1720 * TLC uses this and doesn't support the new FW rate 1721 */ 1722 info->status.status_driver_data[1] = 1723 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1724 1725 /* Single frame failure in an AMPDU queue => send BAR */ 1726 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1727 !(info->flags & IEEE80211_TX_STAT_ACK) && 1728 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1729 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1730 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1731 1732 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1733 if (ieee80211_is_back_req(hdr->frame_control)) 1734 seq_ctl = 0; 1735 else if (status != TX_STATUS_SUCCESS) 1736 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1737 1738 if (unlikely(!seq_ctl)) { 1739 /* 1740 * If it is an NDP, we can't update next_reclaim since 1741 * its sequence control is 0. Note that for that same 1742 * reason, NDPs are never sent to A-MPDU'able queues 1743 * so that we can never have more than one freed frame 1744 * for a single Tx resonse (see WARN_ON below). 1745 */ 1746 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1747 is_ndp = true; 1748 } 1749 1750 /* 1751 * TODO: this is not accurate if we are freeing more than one 1752 * packet. 1753 */ 1754 info->status.tx_time = 1755 le16_to_cpu(tx_resp->wireless_media_time); 1756 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1757 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1758 info->status.status_driver_data[0] = 1759 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1760 1761 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1))) 1762 ieee80211_tx_status(mvm->hw, skb); 1763 } 1764 1765 /* This is an aggregation queue or might become one, so we use 1766 * the ssn since: ssn = wifi seq_num % 256. 1767 * The seq_ctl is the sequence control of the packet to which 1768 * this Tx response relates. But if there is a hole in the 1769 * bitmap of the BA we received, this Tx response may allow to 1770 * reclaim the hole and all the subsequent packets that were 1771 * already acked. In that case, seq_ctl != ssn, and the next 1772 * packet to be reclaimed will be ssn and not seq_ctl. In that 1773 * case, several packets will be reclaimed even if 1774 * frame_count = 1. 1775 * 1776 * The ssn is the index (% 256) of the latest packet that has 1777 * treated (acked / dropped) + 1. 1778 */ 1779 next_reclaimed = ssn; 1780 1781 IWL_DEBUG_TX_REPLY(mvm, 1782 "TXQ %d status %s (0x%08x)\n", 1783 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1784 1785 IWL_DEBUG_TX_REPLY(mvm, 1786 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1787 le32_to_cpu(tx_resp->initial_rate), 1788 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1789 ssn, next_reclaimed, seq_ctl); 1790 1791 rcu_read_lock(); 1792 1793 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1794 /* 1795 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1796 * the firmware while we still have packets for it in the Tx queues. 1797 */ 1798 if (WARN_ON_ONCE(!sta)) 1799 goto out; 1800 1801 if (!IS_ERR(sta)) { 1802 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1803 1804 iwl_mvm_tx_airtime(mvm, mvmsta, 1805 le16_to_cpu(tx_resp->wireless_media_time)); 1806 1807 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1808 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1809 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1810 1811 if (sta->wme && tid != IWL_MGMT_TID) { 1812 struct iwl_mvm_tid_data *tid_data = 1813 &mvmsta->tid_data[tid]; 1814 bool send_eosp_ndp = false; 1815 1816 spin_lock_bh(&mvmsta->lock); 1817 1818 if (!is_ndp) { 1819 tid_data->next_reclaimed = next_reclaimed; 1820 IWL_DEBUG_TX_REPLY(mvm, 1821 "Next reclaimed packet:%d\n", 1822 next_reclaimed); 1823 } else { 1824 IWL_DEBUG_TX_REPLY(mvm, 1825 "NDP - don't update next_reclaimed\n"); 1826 } 1827 1828 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1829 1830 if (mvmsta->sleep_tx_count) { 1831 mvmsta->sleep_tx_count--; 1832 if (mvmsta->sleep_tx_count && 1833 !iwl_mvm_tid_queued(mvm, tid_data)) { 1834 /* 1835 * The number of frames in the queue 1836 * dropped to 0 even if we sent less 1837 * frames than we thought we had on the 1838 * Tx queue. 1839 * This means we had holes in the BA 1840 * window that we just filled, ask 1841 * mac80211 to send EOSP since the 1842 * firmware won't know how to do that. 1843 * Send NDP and the firmware will send 1844 * EOSP notification that will trigger 1845 * a call to ieee80211_sta_eosp(). 1846 */ 1847 send_eosp_ndp = true; 1848 } 1849 } 1850 1851 spin_unlock_bh(&mvmsta->lock); 1852 if (send_eosp_ndp) { 1853 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1854 IEEE80211_FRAME_RELEASE_UAPSD, 1855 1, tid, false, false); 1856 mvmsta->sleep_tx_count = 0; 1857 ieee80211_send_eosp_nullfunc(sta, tid); 1858 } 1859 } 1860 1861 if (mvmsta->next_status_eosp) { 1862 mvmsta->next_status_eosp = false; 1863 ieee80211_sta_eosp(sta); 1864 } 1865 } 1866out: 1867 rcu_read_unlock(); 1868} 1869 1870#ifdef CONFIG_IWLWIFI_DEBUG 1871#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1872static const char *iwl_get_agg_tx_status(u16 status) 1873{ 1874 switch (status & AGG_TX_STATE_STATUS_MSK) { 1875 AGG_TX_STATE_(TRANSMITTED); 1876 AGG_TX_STATE_(UNDERRUN); 1877 AGG_TX_STATE_(BT_PRIO); 1878 AGG_TX_STATE_(FEW_BYTES); 1879 AGG_TX_STATE_(ABORT); 1880 AGG_TX_STATE_(TX_ON_AIR_DROP); 1881 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1882 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1883 AGG_TX_STATE_(SCD_QUERY); 1884 AGG_TX_STATE_(TEST_BAD_CRC32); 1885 AGG_TX_STATE_(RESPONSE); 1886 AGG_TX_STATE_(DUMP_TX); 1887 AGG_TX_STATE_(DELAY_TX); 1888 } 1889 1890 return "UNKNOWN"; 1891} 1892 1893static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1894 struct iwl_rx_packet *pkt) 1895{ 1896 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1897 struct agg_tx_status *frame_status = 1898 iwl_mvm_get_agg_status(mvm, tx_resp); 1899 int i; 1900 bool tirgger_timepoint = false; 1901 1902 for (i = 0; i < tx_resp->frame_count; i++) { 1903 u16 fstatus = le16_to_cpu(frame_status[i].status); 1904 /* In case one frame wasn't transmitted trigger time point */ 1905 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1906 AGG_TX_STATE_TRANSMITTED); 1907 IWL_DEBUG_TX_REPLY(mvm, 1908 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1909 iwl_get_agg_tx_status(fstatus), 1910 fstatus & AGG_TX_STATE_STATUS_MSK, 1911 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1912 AGG_TX_STATE_TRY_CNT_POS, 1913 le16_to_cpu(frame_status[i].sequence)); 1914 } 1915 1916 if (tirgger_timepoint) 1917 iwl_dbg_tlv_time_point(&mvm->fwrt, 1918 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1919 1920} 1921#else 1922static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1923 struct iwl_rx_packet *pkt) 1924{} 1925#endif /* CONFIG_IWLWIFI_DEBUG */ 1926 1927static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1928 struct iwl_rx_packet *pkt) 1929{ 1930 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1931 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1932 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1933 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1934 struct iwl_mvm_sta *mvmsta; 1935 int queue = SEQ_TO_QUEUE(sequence); 1936 struct ieee80211_sta *sta; 1937 1938 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1939 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1940 return; 1941 1942 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1943 1944 rcu_read_lock(); 1945 1946 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1947 1948 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1949 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) { 1950 rcu_read_unlock(); 1951 return; 1952 } 1953 1954 if (!WARN_ON_ONCE(!mvmsta)) { 1955 mvmsta->tid_data[tid].rate_n_flags = 1956 le32_to_cpu(tx_resp->initial_rate); 1957 mvmsta->tid_data[tid].tx_time = 1958 le16_to_cpu(tx_resp->wireless_media_time); 1959 mvmsta->tid_data[tid].lq_color = 1960 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1961 iwl_mvm_tx_airtime(mvm, mvmsta, 1962 le16_to_cpu(tx_resp->wireless_media_time)); 1963 } 1964 1965 rcu_read_unlock(); 1966} 1967 1968void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1969{ 1970 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1971 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1972 1973 if (tx_resp->frame_count == 1) 1974 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1975 else 1976 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1977} 1978 1979static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1980 int txq, int index, 1981 struct ieee80211_tx_info *tx_info, u32 rate, 1982 bool is_flush) 1983{ 1984 struct sk_buff_head reclaimed_skbs; 1985 struct iwl_mvm_tid_data *tid_data = NULL; 1986 struct ieee80211_sta *sta; 1987 struct iwl_mvm_sta *mvmsta = NULL; 1988 struct sk_buff *skb; 1989 int freed; 1990 1991 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1992 tid > IWL_MAX_TID_COUNT, 1993 "sta_id %d tid %d", sta_id, tid)) 1994 return; 1995 1996 rcu_read_lock(); 1997 1998 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1999 2000 /* Reclaiming frames for a station that has been deleted ? */ 2001 if (WARN_ON_ONCE(!sta)) { 2002 rcu_read_unlock(); 2003 return; 2004 } 2005 2006 __skb_queue_head_init(&reclaimed_skbs); 2007 2008 /* 2009 * Release all TFDs before the SSN, i.e. all TFDs in front of 2010 * block-ack window (we assume that they've been successfully 2011 * transmitted ... if not, it's too late anyway). 2012 */ 2013 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush); 2014 2015 skb_queue_walk(&reclaimed_skbs, skb) { 2016 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2017 2018 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 2019 2020 memset(&info->status, 0, sizeof(info->status)); 2021 /* Packet was transmitted successfully, failures come as single 2022 * frames because before failing a frame the firmware transmits 2023 * it without aggregation at least once. 2024 */ 2025 if (!is_flush) 2026 info->flags |= IEEE80211_TX_STAT_ACK; 2027 else 2028 info->flags &= ~IEEE80211_TX_STAT_ACK; 2029 } 2030 2031 /* 2032 * It's possible to get a BA response after invalidating the rcu (rcu is 2033 * invalidated in order to prevent new Tx from being sent, but there may 2034 * be some frames already in-flight). 2035 * In this case we just want to reclaim, and could skip all the 2036 * sta-dependent stuff since it's in the middle of being removed 2037 * anyways. 2038 */ 2039 if (IS_ERR(sta)) 2040 goto out; 2041 2042 mvmsta = iwl_mvm_sta_from_mac80211(sta); 2043 tid_data = &mvmsta->tid_data[tid]; 2044 2045 if (tid_data->txq_id != txq) { 2046 IWL_ERR(mvm, 2047 "invalid reclaim request: Q %d, tid %d\n", 2048 tid_data->txq_id, tid); 2049 rcu_read_unlock(); 2050 return; 2051 } 2052 2053 spin_lock_bh(&mvmsta->lock); 2054 2055 tid_data->next_reclaimed = index; 2056 2057 iwl_mvm_check_ratid_empty(mvm, sta, tid); 2058 2059 freed = 0; 2060 2061 /* pack lq color from tid_data along the reduced txp */ 2062 tx_info->status.status_driver_data[0] = 2063 RS_DRV_DATA_PACK(tid_data->lq_color, 2064 tx_info->status.status_driver_data[0]); 2065 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 2066 2067 skb_queue_walk(&reclaimed_skbs, skb) { 2068 struct ieee80211_hdr *hdr = (void *)skb->data; 2069 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2070 2071 if (!is_flush) { 2072 if (ieee80211_is_data_qos(hdr->frame_control)) 2073 freed++; 2074 else 2075 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 2076 } 2077 2078 /* this is the first skb we deliver in this batch */ 2079 /* put the rate scaling data there */ 2080 if (freed == 1) { 2081 info->flags |= IEEE80211_TX_STAT_AMPDU; 2082 memcpy(&info->status, &tx_info->status, 2083 sizeof(tx_info->status)); 2084 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info); 2085 } 2086 } 2087 2088 spin_unlock_bh(&mvmsta->lock); 2089 2090 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 2091 * possible (i.e. first MPDU in the aggregation wasn't acked) 2092 * Still it's important to update RS about sent vs. acked. 2093 */ 2094 if (!is_flush && skb_queue_empty(&reclaimed_skbs) && 2095 !iwl_mvm_has_tlc_offload(mvm)) { 2096 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 2097 2098 /* no TLC offload, so non-MLD mode */ 2099 if (mvmsta->vif) 2100 chanctx_conf = 2101 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf); 2102 2103 if (WARN_ON_ONCE(!chanctx_conf)) 2104 goto out; 2105 2106 tx_info->band = chanctx_conf->def.chan->band; 2107 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info); 2108 2109 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 2110 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 2111 } 2112 2113out: 2114 rcu_read_unlock(); 2115 2116 while (!skb_queue_empty(&reclaimed_skbs)) { 2117 skb = __skb_dequeue(&reclaimed_skbs); 2118 ieee80211_tx_status(mvm->hw, skb); 2119 } 2120} 2121 2122void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2123{ 2124 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2125 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 2126 int sta_id, tid, txq, index; 2127 struct ieee80211_tx_info ba_info = {}; 2128 struct iwl_mvm_ba_notif *ba_notif; 2129 struct iwl_mvm_tid_data *tid_data; 2130 struct iwl_mvm_sta *mvmsta; 2131 2132 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 2133 2134 if (iwl_mvm_has_new_tx_api(mvm)) { 2135 struct iwl_mvm_compressed_ba_notif *ba_res = 2136 (void *)pkt->data; 2137 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 2138 u16 tfd_cnt; 2139 int i; 2140 2141 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len, 2142 "short BA notification (%d)\n", pkt_len)) 2143 return; 2144 2145 sta_id = ba_res->sta_id; 2146 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 2147 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 2148 ba_info.status.tx_time = 2149 (u16)le32_to_cpu(ba_res->wireless_time); 2150 ba_info.status.status_driver_data[0] = 2151 (void *)(uintptr_t)ba_res->reduced_txp; 2152 2153 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 2154 if (!tfd_cnt) 2155 return; 2156 2157 if (IWL_FW_CHECK(mvm, 2158 struct_size(ba_res, tfd, tfd_cnt) > pkt_len, 2159 "short BA notification (tfds:%d, size:%d)\n", 2160 tfd_cnt, pkt_len)) 2161 return; 2162 2163 rcu_read_lock(); 2164 2165 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2166 /* 2167 * It's possible to get a BA response after invalidating the rcu 2168 * (rcu is invalidated in order to prevent new Tx from being 2169 * sent, but there may be some frames already in-flight). 2170 * In this case we just want to reclaim, and could skip all the 2171 * sta-dependent stuff since it's in the middle of being removed 2172 * anyways. 2173 */ 2174 2175 /* Free per TID */ 2176 for (i = 0; i < tfd_cnt; i++) { 2177 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 2178 &ba_res->tfd[i]; 2179 2180 tid = ba_tfd->tid; 2181 if (tid == IWL_MGMT_TID) 2182 tid = IWL_MAX_TID_COUNT; 2183 2184 if (mvmsta) 2185 mvmsta->tid_data[i].lq_color = lq_color; 2186 2187 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 2188 (int)(le16_to_cpu(ba_tfd->q_num)), 2189 le16_to_cpu(ba_tfd->tfd_index), 2190 &ba_info, 2191 le32_to_cpu(ba_res->tx_rate), false); 2192 } 2193 2194 if (mvmsta) 2195 iwl_mvm_tx_airtime(mvm, mvmsta, 2196 le32_to_cpu(ba_res->wireless_time)); 2197 rcu_read_unlock(); 2198 2199 IWL_DEBUG_TX_REPLY(mvm, 2200 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2201 sta_id, le32_to_cpu(ba_res->flags), 2202 le16_to_cpu(ba_res->txed), 2203 le16_to_cpu(ba_res->done)); 2204 return; 2205 } 2206 2207 ba_notif = (void *)pkt->data; 2208 sta_id = ba_notif->sta_id; 2209 tid = ba_notif->tid; 2210 /* "flow" corresponds to Tx queue */ 2211 txq = le16_to_cpu(ba_notif->scd_flow); 2212 /* "ssn" is start of block-ack Tx window, corresponds to index 2213 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2214 index = le16_to_cpu(ba_notif->scd_ssn); 2215 2216 rcu_read_lock(); 2217 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2218 if (IWL_FW_CHECK(mvm, !mvmsta, 2219 "invalid STA ID %d in BA notif\n", 2220 sta_id)) { 2221 rcu_read_unlock(); 2222 return; 2223 } 2224 2225 tid_data = &mvmsta->tid_data[tid]; 2226 2227 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2228 ba_info.status.ampdu_len = ba_notif->txed; 2229 ba_info.status.tx_time = tid_data->tx_time; 2230 ba_info.status.status_driver_data[0] = 2231 (void *)(uintptr_t)ba_notif->reduced_txp; 2232 2233 rcu_read_unlock(); 2234 2235 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2236 tid_data->rate_n_flags, false); 2237 2238 IWL_DEBUG_TX_REPLY(mvm, 2239 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2240 ba_notif->sta_addr, ba_notif->sta_id); 2241 2242 IWL_DEBUG_TX_REPLY(mvm, 2243 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2244 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2245 le64_to_cpu(ba_notif->bitmap), txq, index, 2246 ba_notif->txed, ba_notif->txed_2_done); 2247 2248 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2249 ba_notif->reduced_txp); 2250} 2251 2252/* 2253 * Note that there are transports that buffer frames before they reach 2254 * the firmware. This means that after flush_tx_path is called, the 2255 * queue might not be empty. The race-free way to handle this is to: 2256 * 1) set the station as draining 2257 * 2) flush the Tx path 2258 * 3) wait for the transport queues to be empty 2259 */ 2260int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2261{ 2262 int ret; 2263 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2264 .queues_ctl = cpu_to_le32(tfd_msk), 2265 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2266 }; 2267 2268 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2269 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2270 sizeof(flush_cmd), &flush_cmd); 2271 if (ret) 2272 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2273 return ret; 2274} 2275 2276int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2277{ 2278 int ret; 2279 struct iwl_tx_path_flush_cmd_rsp *rsp; 2280 struct iwl_tx_path_flush_cmd flush_cmd = { 2281 .sta_id = cpu_to_le32(sta_id), 2282 .tid_mask = cpu_to_le16(tids), 2283 }; 2284 2285 struct iwl_host_cmd cmd = { 2286 .id = TXPATH_FLUSH, 2287 .len = { sizeof(flush_cmd), }, 2288 .data = { &flush_cmd, }, 2289 }; 2290 2291 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2292 2293 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2294 cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL; 2295 2296 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2297 sta_id, tids); 2298 2299 ret = iwl_mvm_send_cmd(mvm, &cmd); 2300 2301 if (ret) { 2302 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2303 return ret; 2304 } 2305 2306 if (cmd.flags & CMD_WANT_SKB) { 2307 int i; 2308 int num_flushed_queues; 2309 2310 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2311 ret = -EIO; 2312 goto free_rsp; 2313 } 2314 2315 rsp = (void *)cmd.resp_pkt->data; 2316 2317 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2318 "sta_id %d != rsp_sta_id %d", 2319 sta_id, le16_to_cpu(rsp->sta_id))) { 2320 ret = -EIO; 2321 goto free_rsp; 2322 } 2323 2324 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2325 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2326 "num_flushed_queues %d", num_flushed_queues)) { 2327 ret = -EIO; 2328 goto free_rsp; 2329 } 2330 2331 for (i = 0; i < num_flushed_queues; i++) { 2332 struct ieee80211_tx_info tx_info = {}; 2333 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2334 int tid = le16_to_cpu(queue_info->tid); 2335 int read_before = le16_to_cpu(queue_info->read_before_flush); 2336 int read_after = le16_to_cpu(queue_info->read_after_flush); 2337 int queue_num = le16_to_cpu(queue_info->queue_num); 2338 2339 if (tid == IWL_MGMT_TID) 2340 tid = IWL_MAX_TID_COUNT; 2341 2342 IWL_DEBUG_TX_QUEUES(mvm, 2343 "tid %d queue_id %d read-before %d read-after %d\n", 2344 tid, queue_num, read_before, read_after); 2345 2346 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2347 &tx_info, 0, true); 2348 } 2349free_rsp: 2350 iwl_free_resp(&cmd); 2351 } 2352 return ret; 2353} 2354 2355int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask) 2356{ 2357 if (iwl_mvm_has_new_tx_api(mvm)) 2358 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff); 2359 2360 return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask); 2361} 2362