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_convert_rate_idx(struct iwl_mvm *mvm, 266 struct ieee80211_tx_info *info, 267 int rate_idx) 268{ 269 u32 rate_flags = 0; 270 u8 rate_plcp; 271 bool is_cck; 272 273 /* if the rate isn't a well known legacy rate, take the lowest one */ 274 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 275 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm, 276 info, 277 info->control.vif); 278 279 /* Get PLCP rate for tx_cmd->rate_n_flags */ 280 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx); 281 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && 282 (rate_idx <= IWL_LAST_CCK_RATE); 283 284 /* Set CCK or OFDM flag */ 285 if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) { 286 if (!is_cck) 287 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK; 288 else 289 rate_flags |= RATE_MCS_CCK_MSK; 290 } else if (is_cck) { 291 rate_flags |= RATE_MCS_CCK_MSK_V1; 292 } 293 294 return (u32)rate_plcp | rate_flags; 295} 296 297static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm, 298 struct ieee80211_tx_info *info, 299 struct ieee80211_sta *sta, 300 __le16 fc) 301{ 302 struct ieee80211_tx_rate *rate = &info->control.rates[0]; 303 u32 result; 304 305 /* 306 * we only care about legacy/HT/VHT so far, so we can 307 * build in v1 and use iwl_new_rate_from_v1() 308 */ 309 310 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { 311 u8 mcs = ieee80211_rate_get_vht_mcs(rate); 312 u8 nss = ieee80211_rate_get_vht_nss(rate); 313 314 result = RATE_MCS_VHT_MSK_V1; 315 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK); 316 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK); 317 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 318 result |= RATE_MCS_SGI_MSK_V1; 319 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 320 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 321 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 322 result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1); 323 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 324 result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1); 325 326 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6) 327 result = iwl_new_rate_from_v1(result); 328 } else if (rate->flags & IEEE80211_TX_RC_MCS) { 329 result = RATE_MCS_HT_MSK_V1; 330 result |= u32_encode_bits(rate->idx, 331 RATE_HT_MCS_RATE_CODE_MSK_V1 | 332 RATE_HT_MCS_NSS_MSK_V1); 333 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 334 result |= RATE_MCS_SGI_MSK_V1; 335 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 336 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 337 if (info->flags & IEEE80211_TX_CTL_LDPC) 338 result |= RATE_MCS_LDPC_MSK_V1; 339 if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC)) 340 result |= RATE_MCS_STBC_MSK; 341 342 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6) 343 result = iwl_new_rate_from_v1(result); 344 } else { 345 int rate_idx = info->control.rates[0].idx; 346 347 result = iwl_mvm_convert_rate_idx(mvm, info, rate_idx); 348 } 349 350 if (info->control.antennas) 351 result |= u32_encode_bits(info->control.antennas, 352 RATE_MCS_ANT_AB_MSK); 353 else 354 result |= iwl_mvm_get_tx_ant(mvm, info, sta, fc); 355 356 return result; 357} 358 359static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 360 struct ieee80211_tx_info *info, 361 struct ieee80211_sta *sta, __le16 fc) 362{ 363 int rate_idx = -1; 364 365 if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { 366 /* info->control is only relevant for non HW rate control */ 367 368 /* HT rate doesn't make sense for a non data frame */ 369 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && 370 !ieee80211_is_data(fc), 371 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", 372 info->control.rates[0].flags, 373 info->control.rates[0].idx, 374 le16_to_cpu(fc), 375 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 376 377 rate_idx = info->control.rates[0].idx; 378 379 /* For non 2 GHZ band, remap mac80211 rate indices into driver 380 * indices. 381 */ 382 if (info->band != NL80211_BAND_2GHZ || 383 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE)) 384 rate_idx += IWL_FIRST_OFDM_RATE; 385 386 /* For 2.4 GHZ band, check that there is no need to remap */ 387 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 388 } 389 390 return iwl_mvm_convert_rate_idx(mvm, info, rate_idx); 391} 392 393static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 394 struct ieee80211_tx_info *info, 395 struct ieee80211_sta *sta, __le16 fc) 396{ 397 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) 398 return iwl_mvm_get_inject_tx_rate(mvm, info, sta, fc); 399 400 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) | 401 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 402} 403 404/* 405 * Sets the fields in the Tx cmd that are rate related 406 */ 407void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 408 struct ieee80211_tx_info *info, 409 struct ieee80211_sta *sta, __le16 fc) 410{ 411 /* Set retry limit on RTS packets */ 412 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 413 414 /* Set retry limit on DATA packets and Probe Responses*/ 415 if (ieee80211_is_probe_resp(fc)) { 416 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 417 tx_cmd->rts_retry_limit = 418 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 419 } else if (ieee80211_is_back_req(fc)) { 420 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 421 } else { 422 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 423 } 424 425 /* 426 * for data packets, rate info comes from the table inside the fw. This 427 * table is controlled by LINK_QUALITY commands 428 */ 429 430 if (likely(ieee80211_is_data(fc) && sta && 431 !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) { 432 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 433 434 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 435 tx_cmd->initial_rate_index = 0; 436 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 437 return; 438 } 439 } else if (ieee80211_is_back_req(fc)) { 440 tx_cmd->tx_flags |= 441 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 442 } 443 444 /* Set the rate in the TX cmd */ 445 tx_cmd->rate_n_flags = 446 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 447} 448 449static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 450 u8 *crypto_hdr) 451{ 452 struct ieee80211_key_conf *keyconf = info->control.hw_key; 453 u64 pn; 454 455 pn = atomic64_inc_return(&keyconf->tx_pn); 456 crypto_hdr[0] = pn; 457 crypto_hdr[2] = 0; 458 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 459 crypto_hdr[1] = pn >> 8; 460 crypto_hdr[4] = pn >> 16; 461 crypto_hdr[5] = pn >> 24; 462 crypto_hdr[6] = pn >> 32; 463 crypto_hdr[7] = pn >> 40; 464} 465 466/* 467 * Sets the fields in the Tx cmd that are crypto related 468 */ 469static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 470 struct ieee80211_tx_info *info, 471 struct iwl_tx_cmd *tx_cmd, 472 struct sk_buff *skb_frag, 473 int hdrlen) 474{ 475 struct ieee80211_key_conf *keyconf = info->control.hw_key; 476 u8 *crypto_hdr = skb_frag->data + hdrlen; 477 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 478 u64 pn; 479 480 switch (keyconf->cipher) { 481 case WLAN_CIPHER_SUITE_CCMP: 482 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 483 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 484 break; 485 486 case WLAN_CIPHER_SUITE_TKIP: 487 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 488 pn = atomic64_inc_return(&keyconf->tx_pn); 489 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 490 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 491 break; 492 493 case WLAN_CIPHER_SUITE_WEP104: 494 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 495 fallthrough; 496 case WLAN_CIPHER_SUITE_WEP40: 497 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 498 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 499 TX_CMD_SEC_WEP_KEY_IDX_MSK); 500 501 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 502 break; 503 case WLAN_CIPHER_SUITE_GCMP: 504 case WLAN_CIPHER_SUITE_GCMP_256: 505 type = TX_CMD_SEC_GCMP; 506 fallthrough; 507 case WLAN_CIPHER_SUITE_CCMP_256: 508 /* TODO: Taking the key from the table might introduce a race 509 * when PTK rekeying is done, having an old packets with a PN 510 * based on the old key but the message encrypted with a new 511 * one. 512 * Need to handle this. 513 */ 514 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 515 tx_cmd->key[0] = keyconf->hw_key_idx; 516 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 517 break; 518 default: 519 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 520 } 521} 522 523static bool iwl_mvm_use_host_rate(struct iwl_mvm *mvm, 524 struct iwl_mvm_sta *mvmsta, 525 struct ieee80211_hdr *hdr, 526 struct ieee80211_tx_info *info) 527{ 528 if (unlikely(!mvmsta)) 529 return true; 530 531 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) 532 return true; 533 534 if (likely(ieee80211_is_data(hdr->frame_control) && 535 mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED)) 536 return false; 537 538 /* 539 * Not a data frame, use host rate if on an old device that 540 * can't possibly be doing MLO (firmware may be selecting a 541 * bad rate), if we might be doing MLO we need to let FW pick 542 * (since we don't necesarily know the link), but FW rate 543 * selection was fixed. 544 */ 545 return mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ; 546} 547 548static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen, 549 const u8 *addr3_override) 550{ 551 struct ieee80211_hdr *out_hdr = cmd; 552 553 memcpy(cmd, hdr, hdrlen); 554 if (addr3_override) 555 memcpy(out_hdr->addr3, addr3_override, ETH_ALEN); 556} 557 558/* 559 * Allocates and sets the Tx cmd the driver data pointers in the skb 560 */ 561static struct iwl_device_tx_cmd * 562iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 563 struct ieee80211_tx_info *info, int hdrlen, 564 struct ieee80211_sta *sta, u8 sta_id, 565 const u8 *addr3_override) 566{ 567 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 568 struct iwl_device_tx_cmd *dev_cmd; 569 struct iwl_tx_cmd *tx_cmd; 570 571 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 572 573 if (unlikely(!dev_cmd)) 574 return NULL; 575 576 dev_cmd->hdr.cmd = TX_CMD; 577 578 if (iwl_mvm_has_new_tx_api(mvm)) { 579 u32 rate_n_flags = 0; 580 u16 flags = 0; 581 struct iwl_mvm_sta *mvmsta = sta ? 582 iwl_mvm_sta_from_mac80211(sta) : NULL; 583 bool amsdu = false; 584 585 if (ieee80211_is_data_qos(hdr->frame_control)) { 586 u8 *qc = ieee80211_get_qos_ctl(hdr); 587 588 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 589 } 590 591 if (!info->control.hw_key) 592 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 593 594 /* 595 * For data and mgmt packets rate info comes from the fw (for 596 * new devices, older FW is somewhat broken for this). Only 597 * set rate/antenna for injected frames with fixed rate, or 598 * when no sta is given, or with older firmware. 599 */ 600 if (unlikely(iwl_mvm_use_host_rate(mvm, mvmsta, hdr, info))) { 601 flags |= IWL_TX_FLAGS_CMD_RATE; 602 rate_n_flags = 603 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 604 hdr->frame_control); 605 } else if (!ieee80211_is_data(hdr->frame_control) || 606 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 607 /* These are important frames */ 608 flags |= IWL_TX_FLAGS_HIGH_PRI; 609 } 610 611 if (mvm->trans->trans_cfg->device_family >= 612 IWL_DEVICE_FAMILY_AX210) { 613 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 614 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, 615 info, amsdu); 616 617 cmd->offload_assist = cpu_to_le32(offload_assist); 618 619 /* Total # bytes to be transmitted */ 620 cmd->len = cpu_to_le16((u16)skb->len); 621 622 /* Copy MAC header from skb into command buffer */ 623 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override); 624 625 cmd->flags = cpu_to_le16(flags); 626 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 627 } else { 628 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 629 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb, 630 info, amsdu); 631 632 cmd->offload_assist = cpu_to_le16(offload_assist); 633 634 /* Total # bytes to be transmitted */ 635 cmd->len = cpu_to_le16((u16)skb->len); 636 637 /* Copy MAC header from skb into command buffer */ 638 iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override); 639 640 cmd->flags = cpu_to_le32(flags); 641 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 642 } 643 goto out; 644 } 645 646 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 647 648 if (info->control.hw_key) 649 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 650 651 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 652 653 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 654 655 /* Copy MAC header from skb into command buffer */ 656 iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override); 657 658out: 659 return dev_cmd; 660} 661 662static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 663 struct iwl_device_tx_cmd *cmd) 664{ 665 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 666 667 memset(&skb_info->status, 0, sizeof(skb_info->status)); 668 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 669 670 skb_info->driver_data[1] = cmd; 671} 672 673static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 674 struct iwl_mvm_vif_link_info *link, 675 struct ieee80211_tx_info *info, 676 struct sk_buff *skb) 677{ 678 struct ieee80211_hdr *hdr = (void *)skb->data; 679 __le16 fc = hdr->frame_control; 680 681 switch (info->control.vif->type) { 682 case NL80211_IFTYPE_AP: 683 case NL80211_IFTYPE_ADHOC: 684 /* 685 * Non-bufferable frames use the broadcast station, thus they 686 * use the probe queue. 687 * Also take care of the case where we send a deauth to a 688 * station that we don't have, or similarly an association 689 * response (with non-success status) for a station we can't 690 * accept. 691 * Also, disassociate frames might happen, particular with 692 * reason 7 ("Class 3 frame received from nonassociated STA"). 693 */ 694 if (ieee80211_is_mgmt(fc) && 695 (!ieee80211_is_bufferable_mmpdu(skb) || 696 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 697 return link->mgmt_queue; 698 699 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 700 is_multicast_ether_addr(hdr->addr1)) 701 return link->cab_queue; 702 703 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 704 "fc=0x%02x", le16_to_cpu(fc)); 705 return link->mgmt_queue; 706 case NL80211_IFTYPE_P2P_DEVICE: 707 if (ieee80211_is_mgmt(fc)) 708 return mvm->p2p_dev_queue; 709 710 WARN_ON_ONCE(1); 711 return mvm->p2p_dev_queue; 712 default: 713 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 714 return -1; 715 } 716} 717 718static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 719 struct sk_buff *skb) 720{ 721 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 722 struct iwl_mvm_vif *mvmvif = 723 iwl_mvm_vif_from_mac80211(info->control.vif); 724 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 725 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 726 struct iwl_probe_resp_data *resp_data; 727 const u8 *ie; 728 u8 *pos; 729 u8 match[] = { 730 (WLAN_OUI_WFA >> 16) & 0xff, 731 (WLAN_OUI_WFA >> 8) & 0xff, 732 WLAN_OUI_WFA & 0xff, 733 WLAN_OUI_TYPE_WFA_P2P, 734 }; 735 736 rcu_read_lock(); 737 738 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data); 739 if (!resp_data) 740 goto out; 741 742 if (!resp_data->notif.noa_active) 743 goto out; 744 745 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 746 mgmt->u.probe_resp.variable, 747 skb->len - base_len, 748 match, 4, 2); 749 if (!ie) { 750 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 751 goto out; 752 } 753 754 if (skb_tailroom(skb) < resp_data->noa_len) { 755 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 756 IWL_ERR(mvm, 757 "Failed to reallocate probe resp\n"); 758 goto out; 759 } 760 } 761 762 pos = skb_put(skb, resp_data->noa_len); 763 764 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 765 /* Set length of IE body (not including ID and length itself) */ 766 *pos++ = resp_data->noa_len - 2; 767 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 768 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 769 *pos++ = WLAN_OUI_WFA & 0xff; 770 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 771 772 memcpy(pos, &resp_data->notif.noa_attr, 773 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 774 775out: 776 rcu_read_unlock(); 777} 778 779int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 780{ 781 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 782 struct ieee80211_tx_info info; 783 struct iwl_device_tx_cmd *dev_cmd; 784 u8 sta_id; 785 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 786 __le16 fc = hdr->frame_control; 787 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 788 IEEE80211_TX_CTL_TX_OFFCHAN; 789 int queue = -1; 790 791 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 792 return -1; 793 794 memcpy(&info, skb->cb, sizeof(info)); 795 796 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 797 return -1; 798 799 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 800 return -1; 801 802 if (info.control.vif) { 803 struct iwl_mvm_vif *mvmvif = 804 iwl_mvm_vif_from_mac80211(info.control.vif); 805 806 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 807 info.control.vif->type == NL80211_IFTYPE_AP || 808 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 809 u32 link_id = u32_get_bits(info.control.flags, 810 IEEE80211_TX_CTRL_MLO_LINK); 811 struct iwl_mvm_vif_link_info *link; 812 813 if (link_id == IEEE80211_LINK_UNSPECIFIED) { 814 if (info.control.vif->active_links) 815 link_id = ffs(info.control.vif->active_links) - 1; 816 else 817 link_id = 0; 818 } 819 820 link = mvmvif->link[link_id]; 821 if (WARN_ON(!link)) 822 return -1; 823 824 if (!ieee80211_is_data(hdr->frame_control)) 825 sta_id = link->bcast_sta.sta_id; 826 else 827 sta_id = link->mcast_sta.sta_id; 828 829 queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info, 830 skb); 831 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 832 queue = mvm->snif_queue; 833 sta_id = mvm->snif_sta.sta_id; 834 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 835 offchannel) { 836 /* 837 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 838 * that can be used in 2 different types of vifs, P2P & 839 * STATION. 840 * P2P uses the offchannel queue. 841 * STATION (HS2.0) uses the auxiliary context of the FW, 842 * and hence needs to be sent on the aux queue. 843 */ 844 sta_id = mvm->aux_sta.sta_id; 845 queue = mvm->aux_queue; 846 } 847 } 848 849 if (queue < 0) { 850 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 851 return -1; 852 } 853 854 if (unlikely(ieee80211_is_probe_resp(fc))) 855 iwl_mvm_probe_resp_set_noa(mvm, skb); 856 857 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 858 859 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id, 860 NULL); 861 if (!dev_cmd) 862 return -1; 863 864 /* From now on, we cannot access info->control */ 865 iwl_mvm_skb_prepare_status(skb, dev_cmd); 866 867 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 868 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 869 return -1; 870 } 871 872 return 0; 873} 874 875unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 876 struct ieee80211_sta *sta, unsigned int tid) 877{ 878 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 879 u8 ac = tid_to_mac80211_ac[tid]; 880 enum nl80211_band band; 881 unsigned int txf; 882 unsigned int val; 883 int lmac; 884 885 /* For HE redirect to trigger based fifos */ 886 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 887 ac += 4; 888 889 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 890 891 /* 892 * Don't send an AMSDU that will be longer than the TXF. 893 * Add a security margin of 256 for the TX command + headers. 894 * We also want to have the start of the next packet inside the 895 * fifo to be able to send bursts. 896 */ 897 val = mvmsta->max_amsdu_len; 898 899 if (hweight16(sta->valid_links) <= 1) { 900 if (sta->valid_links) { 901 struct ieee80211_bss_conf *link_conf; 902 unsigned int link = ffs(sta->valid_links) - 1; 903 904 rcu_read_lock(); 905 link_conf = rcu_dereference(mvmsta->vif->link_conf[link]); 906 if (WARN_ON(!link_conf)) 907 band = NL80211_BAND_2GHZ; 908 else 909 band = link_conf->chanreq.oper.chan->band; 910 rcu_read_unlock(); 911 } else { 912 band = mvmsta->vif->bss_conf.chanreq.oper.chan->band; 913 } 914 915 lmac = iwl_mvm_get_lmac_id(mvm, band); 916 } else if (fw_has_capa(&mvm->fw->ucode_capa, 917 IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) { 918 /* for real MLO restrict to both LMACs if they exist */ 919 lmac = IWL_LMAC_5G_INDEX; 920 val = min_t(unsigned int, val, 921 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 922 lmac = IWL_LMAC_24G_INDEX; 923 } else { 924 lmac = IWL_LMAC_24G_INDEX; 925 } 926 927 return min_t(unsigned int, val, 928 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 929} 930 931#ifdef CONFIG_INET 932 933static int 934iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 935 netdev_features_t netdev_flags, 936 struct sk_buff_head *mpdus_skb) 937{ 938 struct sk_buff *tmp, *next; 939 struct ieee80211_hdr *hdr = (void *)skb->data; 940 char cb[sizeof(skb->cb)]; 941 u16 i = 0; 942 unsigned int tcp_payload_len; 943 unsigned int mss = skb_shinfo(skb)->gso_size; 944 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 945 bool qos = ieee80211_is_data_qos(hdr->frame_control); 946 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 947 948 skb_shinfo(skb)->gso_size = num_subframes * mss; 949 memcpy(cb, skb->cb, sizeof(cb)); 950 951 next = skb_gso_segment(skb, netdev_flags); 952 skb_shinfo(skb)->gso_size = mss; 953 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 954 955 if (IS_ERR(next) && PTR_ERR(next) == -ENOMEM) 956 return -ENOMEM; 957 958 if (WARN_ONCE(IS_ERR(next), 959 "skb_gso_segment error: %d\n", (int)PTR_ERR(next))) 960 return PTR_ERR(next); 961 962 if (next) 963 consume_skb(skb); 964 965 skb_list_walk_safe(next, tmp, next) { 966 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 967 /* 968 * Compute the length of all the data added for the A-MSDU. 969 * This will be used to compute the length to write in the TX 970 * command. We have: SNAP + IP + TCP for n -1 subframes and 971 * ETH header for n subframes. 972 */ 973 tcp_payload_len = skb_tail_pointer(tmp) - 974 skb_transport_header(tmp) - 975 tcp_hdrlen(tmp) + tmp->data_len; 976 977 if (ipv4) 978 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 979 980 if (tcp_payload_len > mss) { 981 skb_shinfo(tmp)->gso_size = mss; 982 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 : 983 SKB_GSO_TCPV6; 984 } else { 985 if (qos) { 986 u8 *qc; 987 988 if (ipv4) 989 ip_send_check(ip_hdr(tmp)); 990 991 qc = ieee80211_get_qos_ctl((void *)tmp->data); 992 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 993 } 994 skb_shinfo(tmp)->gso_size = 0; 995 } 996 997 skb_mark_not_on_list(tmp); 998 __skb_queue_tail(mpdus_skb, tmp); 999 i++; 1000 } 1001 1002 return 0; 1003} 1004 1005static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 1006 struct ieee80211_tx_info *info, 1007 struct ieee80211_sta *sta, 1008 struct sk_buff_head *mpdus_skb) 1009{ 1010 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1011 struct ieee80211_hdr *hdr = (void *)skb->data; 1012 unsigned int mss = skb_shinfo(skb)->gso_size; 1013 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 1014 u16 snap_ip_tcp, pad; 1015 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 1016 u8 tid; 1017 1018 snap_ip_tcp = 8 + skb_network_header_len(skb) + tcp_hdrlen(skb); 1019 1020 if (!mvmsta->max_amsdu_len || 1021 !ieee80211_is_data_qos(hdr->frame_control) || 1022 !mvmsta->amsdu_enabled) 1023 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 1024 1025 /* 1026 * Do not build AMSDU for IPv6 with extension headers. 1027 * ask stack to segment and checkum the generated MPDUs for us. 1028 */ 1029 if (skb->protocol == htons(ETH_P_IPV6) && 1030 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 1031 IPPROTO_TCP) { 1032 netdev_flags &= ~NETIF_F_CSUM_MASK; 1033 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 1034 } 1035 1036 tid = ieee80211_get_tid(hdr); 1037 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 1038 return -EINVAL; 1039 1040 /* 1041 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 1042 * during an BA session. 1043 */ 1044 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 1045 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 1046 !(mvmsta->amsdu_enabled & BIT(tid))) 1047 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 1048 1049 /* 1050 * Take the min of ieee80211 station and mvm station 1051 */ 1052 max_amsdu_len = 1053 min_t(unsigned int, sta->cur->max_amsdu_len, 1054 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 1055 1056 /* 1057 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 1058 * supported. This is a spec requirement (IEEE 802.11-2015 1059 * section 8.7.3 NOTE 3). 1060 */ 1061 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1062 !sta->deflink.vht_cap.vht_supported) 1063 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 1064 1065 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 1066 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 1067 pad = (4 - subf_len) & 0x3; 1068 1069 /* 1070 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 1071 * N * subf_len + (N - 1) * pad. 1072 */ 1073 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 1074 1075 if (sta->max_amsdu_subframes && 1076 num_subframes > sta->max_amsdu_subframes) 1077 num_subframes = sta->max_amsdu_subframes; 1078 1079 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1080 tcp_hdrlen(skb) + skb->data_len; 1081 1082 /* 1083 * Make sure we have enough TBs for the A-MSDU: 1084 * 2 for each subframe 1085 * 1 more for each fragment 1086 * 1 more for the potential data in the header 1087 */ 1088 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 1089 mvm->trans->max_skb_frags) 1090 num_subframes = 1; 1091 1092 if (num_subframes > 1) 1093 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1094 1095 /* This skb fits in one single A-MSDU */ 1096 if (num_subframes * mss >= tcp_payload_len) { 1097 __skb_queue_tail(mpdus_skb, skb); 1098 return 0; 1099 } 1100 1101 /* 1102 * Trick the segmentation function to make it 1103 * create SKBs that can fit into one A-MSDU. 1104 */ 1105 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 1106 mpdus_skb); 1107} 1108#else /* CONFIG_INET */ 1109static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 1110 struct ieee80211_tx_info *info, 1111 struct ieee80211_sta *sta, 1112 struct sk_buff_head *mpdus_skb) 1113{ 1114 /* Impossible to get TSO with CONFIG_INET */ 1115 WARN_ON(1); 1116 1117 return -1; 1118} 1119#endif 1120 1121/* Check if there are any timed-out TIDs on a given shared TXQ */ 1122static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1123{ 1124 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1125 unsigned long now = jiffies; 1126 int tid; 1127 1128 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1129 return false; 1130 1131 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1132 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1133 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1134 return true; 1135 } 1136 1137 return false; 1138} 1139 1140static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1141 struct iwl_mvm_sta *mvmsta, 1142 int airtime) 1143{ 1144 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1145 struct iwl_mvm_tcm_mac *mdata; 1146 1147 if (mac >= NUM_MAC_INDEX_DRIVER) 1148 return; 1149 1150 mdata = &mvm->tcm.data[mac]; 1151 1152 if (mvm->tcm.paused) 1153 return; 1154 1155 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1156 schedule_delayed_work(&mvm->tcm.work, 0); 1157 1158 mdata->tx.airtime += airtime; 1159} 1160 1161static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1162 struct iwl_mvm_sta *mvmsta, int tid) 1163{ 1164 u32 ac = tid_to_mac80211_ac[tid]; 1165 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1166 struct iwl_mvm_tcm_mac *mdata; 1167 1168 if (mac >= NUM_MAC_INDEX_DRIVER) 1169 return -EINVAL; 1170 1171 mdata = &mvm->tcm.data[mac]; 1172 1173 mdata->tx.pkts[ac]++; 1174 1175 return 0; 1176} 1177 1178/* 1179 * Sets the fields in the Tx cmd that are crypto related. 1180 * 1181 * This function must be called with BHs disabled. 1182 */ 1183static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1184 struct ieee80211_tx_info *info, 1185 struct ieee80211_sta *sta, 1186 const u8 *addr3_override) 1187{ 1188 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1189 struct iwl_mvm_sta *mvmsta; 1190 struct iwl_device_tx_cmd *dev_cmd; 1191 __le16 fc; 1192 u16 seq_number = 0; 1193 u8 tid = IWL_MAX_TID_COUNT; 1194 u16 txq_id; 1195 bool is_ampdu = false; 1196 int hdrlen; 1197 1198 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1199 fc = hdr->frame_control; 1200 hdrlen = ieee80211_hdrlen(fc); 1201 1202 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1203 return -1; 1204 1205 if (WARN_ON_ONCE(!mvmsta)) 1206 return -1; 1207 1208 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1209 return -1; 1210 1211 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he) 1212 return -1; 1213 1214 if (unlikely(ieee80211_is_probe_resp(fc))) 1215 iwl_mvm_probe_resp_set_noa(mvm, skb); 1216 1217 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1218 sta, mvmsta->deflink.sta_id, 1219 addr3_override); 1220 if (!dev_cmd) 1221 goto drop; 1222 1223 /* 1224 * we handle that entirely ourselves -- for uAPSD the firmware 1225 * will always send a notification, and for PS-Poll responses 1226 * we'll notify mac80211 when getting frame status 1227 */ 1228 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1229 1230 spin_lock(&mvmsta->lock); 1231 1232 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1233 * the conditions of !ieee80211_is_qos_nullfunc(fc) and 1234 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID 1235 */ 1236 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1237 tid = ieee80211_get_tid(hdr); 1238 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1239 goto drop_unlock_sta; 1240 1241 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1242 if (WARN_ONCE(is_ampdu && 1243 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1244 "Invalid internal agg state %d for TID %d", 1245 mvmsta->tid_data[tid].state, tid)) 1246 goto drop_unlock_sta; 1247 1248 seq_number = mvmsta->tid_data[tid].seq_number; 1249 seq_number &= IEEE80211_SCTL_SEQ; 1250 1251 if (!iwl_mvm_has_new_tx_api(mvm)) { 1252 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1253 1254 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1255 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1256 /* update the tx_cmd hdr as it was already copied */ 1257 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1258 } 1259 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) && 1260 !ieee80211_is_nullfunc(fc)) { 1261 tid = IWL_TID_NON_QOS; 1262 } 1263 1264 txq_id = mvmsta->tid_data[tid].txq_id; 1265 1266 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1267 1268 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1269 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1270 spin_unlock(&mvmsta->lock); 1271 return -1; 1272 } 1273 1274 if (!iwl_mvm_has_new_tx_api(mvm)) { 1275 /* Keep track of the time of the last frame for this RA/TID */ 1276 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1277 1278 /* 1279 * If we have timed-out TIDs - schedule the worker that will 1280 * reconfig the queues and update them 1281 * 1282 * Note that the no lock is taken here in order to not serialize 1283 * the TX flow. This isn't dangerous because scheduling 1284 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1285 * schedule it due to some race condition then next TX we get 1286 * here we will. 1287 */ 1288 if (unlikely(mvm->queue_info[txq_id].status == 1289 IWL_MVM_QUEUE_SHARED && 1290 iwl_mvm_txq_should_update(mvm, txq_id))) 1291 schedule_work(&mvm->add_stream_wk); 1292 } 1293 1294 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1295 mvmsta->deflink.sta_id, tid, txq_id, 1296 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1297 1298 /* From now on, we cannot access info->control */ 1299 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1300 1301 /* 1302 * The IV is introduced by the HW for new tx api, and it is not present 1303 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the 1304 * IV for those devices. 1305 */ 1306 if (ieee80211_is_data(fc)) 1307 iwl_mvm_mei_tx_copy_to_csme(mvm, skb, 1308 info->control.hw_key && 1309 !iwl_mvm_has_new_tx_api(mvm) ? 1310 info->control.hw_key->iv_len : 0); 1311 1312 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1313 goto drop_unlock_sta; 1314 1315 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1316 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1317 1318 spin_unlock(&mvmsta->lock); 1319 1320 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1321 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1322 goto drop; 1323 1324 return 0; 1325 1326drop_unlock_sta: 1327 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1328 spin_unlock(&mvmsta->lock); 1329drop: 1330 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id, 1331 tid); 1332 return -1; 1333} 1334 1335int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1336 struct ieee80211_sta *sta) 1337{ 1338 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1339 struct ieee80211_tx_info info; 1340 struct sk_buff_head mpdus_skbs; 1341 struct ieee80211_vif *vif; 1342 unsigned int payload_len; 1343 int ret; 1344 struct sk_buff *orig_skb = skb; 1345 const u8 *addr3; 1346 1347 if (WARN_ON_ONCE(!mvmsta)) 1348 return -1; 1349 1350 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1351 return -1; 1352 1353 memcpy(&info, skb->cb, sizeof(info)); 1354 1355 if (!skb_is_gso(skb)) 1356 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL); 1357 1358 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1359 tcp_hdrlen(skb) + skb->data_len; 1360 1361 if (payload_len <= skb_shinfo(skb)->gso_size) 1362 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL); 1363 1364 __skb_queue_head_init(&mpdus_skbs); 1365 1366 vif = info.control.vif; 1367 if (!vif) 1368 return -1; 1369 1370 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1371 if (ret) 1372 return ret; 1373 1374 WARN_ON(skb_queue_empty(&mpdus_skbs)); 1375 1376 /* 1377 * As described in IEEE sta 802.11-2020, table 9-30 (Address 1378 * field contents), A-MSDU address 3 should contain the BSSID 1379 * address. 1380 * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it 1381 * in the command header. We need to preserve the original 1382 * address 3 in the skb header to correctly create all the 1383 * A-MSDU subframe headers from it. 1384 */ 1385 switch (vif->type) { 1386 case NL80211_IFTYPE_STATION: 1387 addr3 = vif->cfg.ap_addr; 1388 break; 1389 case NL80211_IFTYPE_AP: 1390 addr3 = vif->addr; 1391 break; 1392 default: 1393 addr3 = NULL; 1394 break; 1395 } 1396 1397 while (!skb_queue_empty(&mpdus_skbs)) { 1398 struct ieee80211_hdr *hdr; 1399 bool amsdu; 1400 1401 skb = __skb_dequeue(&mpdus_skbs); 1402 hdr = (void *)skb->data; 1403 amsdu = ieee80211_is_data_qos(hdr->frame_control) && 1404 (*ieee80211_get_qos_ctl(hdr) & 1405 IEEE80211_QOS_CTL_A_MSDU_PRESENT); 1406 1407 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta, 1408 amsdu ? addr3 : NULL); 1409 if (ret) { 1410 /* Free skbs created as part of TSO logic that have not yet been dequeued */ 1411 __skb_queue_purge(&mpdus_skbs); 1412 /* skb here is not necessarily same as skb that entered this method, 1413 * so free it explicitly. 1414 */ 1415 if (skb == orig_skb) 1416 ieee80211_free_txskb(mvm->hw, skb); 1417 else 1418 kfree_skb(skb); 1419 /* there was error, but we consumed skb one way or another, so return 0 */ 1420 return 0; 1421 } 1422 } 1423 1424 return 0; 1425} 1426 1427static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1428 struct ieee80211_sta *sta, u8 tid) 1429{ 1430 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1431 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1432 struct ieee80211_vif *vif = mvmsta->vif; 1433 u16 normalized_ssn; 1434 1435 lockdep_assert_held(&mvmsta->lock); 1436 1437 if ((tid_data->state == IWL_AGG_ON || 1438 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1439 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1440 /* 1441 * Now that this aggregation or DQA queue is empty tell 1442 * mac80211 so it knows we no longer have frames buffered for 1443 * the station on this TID (for the TIM bitmap calculation.) 1444 */ 1445 ieee80211_sta_set_buffered(sta, tid, false); 1446 } 1447 1448 /* 1449 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1450 * to align the wrap around of ssn so we compare relevant values. 1451 */ 1452 normalized_ssn = tid_data->ssn; 1453 if (mvm->trans->trans_cfg->gen2) 1454 normalized_ssn &= 0xff; 1455 1456 if (normalized_ssn != tid_data->next_reclaimed) 1457 return; 1458 1459 switch (tid_data->state) { 1460 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1461 IWL_DEBUG_TX_QUEUES(mvm, 1462 "Can continue addBA flow ssn = next_recl = %d\n", 1463 tid_data->next_reclaimed); 1464 tid_data->state = IWL_AGG_STARTING; 1465 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1466 break; 1467 1468 case IWL_EMPTYING_HW_QUEUE_DELBA: 1469 IWL_DEBUG_TX_QUEUES(mvm, 1470 "Can continue DELBA flow ssn = next_recl = %d\n", 1471 tid_data->next_reclaimed); 1472 tid_data->state = IWL_AGG_OFF; 1473 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1474 break; 1475 1476 default: 1477 break; 1478 } 1479} 1480 1481#ifdef CONFIG_IWLWIFI_DEBUG 1482const char *iwl_mvm_get_tx_fail_reason(u32 status) 1483{ 1484#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1485#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1486 1487 switch (status & TX_STATUS_MSK) { 1488 case TX_STATUS_SUCCESS: 1489 return "SUCCESS"; 1490 TX_STATUS_POSTPONE(DELAY); 1491 TX_STATUS_POSTPONE(FEW_BYTES); 1492 TX_STATUS_POSTPONE(BT_PRIO); 1493 TX_STATUS_POSTPONE(QUIET_PERIOD); 1494 TX_STATUS_POSTPONE(CALC_TTAK); 1495 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1496 TX_STATUS_FAIL(SHORT_LIMIT); 1497 TX_STATUS_FAIL(LONG_LIMIT); 1498 TX_STATUS_FAIL(UNDERRUN); 1499 TX_STATUS_FAIL(DRAIN_FLOW); 1500 TX_STATUS_FAIL(RFKILL_FLUSH); 1501 TX_STATUS_FAIL(LIFE_EXPIRE); 1502 TX_STATUS_FAIL(DEST_PS); 1503 TX_STATUS_FAIL(HOST_ABORTED); 1504 TX_STATUS_FAIL(BT_RETRY); 1505 TX_STATUS_FAIL(STA_INVALID); 1506 TX_STATUS_FAIL(FRAG_DROPPED); 1507 TX_STATUS_FAIL(TID_DISABLE); 1508 TX_STATUS_FAIL(FIFO_FLUSHED); 1509 TX_STATUS_FAIL(SMALL_CF_POLL); 1510 TX_STATUS_FAIL(FW_DROP); 1511 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1512 } 1513 1514 return "UNKNOWN"; 1515 1516#undef TX_STATUS_FAIL 1517#undef TX_STATUS_POSTPONE 1518} 1519#endif /* CONFIG_IWLWIFI_DEBUG */ 1520 1521static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1522{ 1523 switch (chan_width) { 1524 case RATE_MCS_CHAN_WIDTH_20: 1525 return 0; 1526 case RATE_MCS_CHAN_WIDTH_40: 1527 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1528 case RATE_MCS_CHAN_WIDTH_80: 1529 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1530 case RATE_MCS_CHAN_WIDTH_160: 1531 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1532 default: 1533 return 0; 1534 } 1535} 1536 1537void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1538 enum nl80211_band band, 1539 struct ieee80211_tx_rate *r) 1540{ 1541 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1542 u32 rate = format == RATE_MCS_HT_MSK ? 1543 RATE_HT_MCS_INDEX(rate_n_flags) : 1544 rate_n_flags & RATE_MCS_CODE_MSK; 1545 1546 r->flags |= 1547 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1548 RATE_MCS_CHAN_WIDTH_MSK); 1549 1550 if (rate_n_flags & RATE_MCS_SGI_MSK) 1551 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1552 if (format == RATE_MCS_HT_MSK) { 1553 r->flags |= IEEE80211_TX_RC_MCS; 1554 r->idx = rate; 1555 } else if (format == RATE_MCS_VHT_MSK) { 1556 ieee80211_rate_set_vht(r, rate, 1557 FIELD_GET(RATE_MCS_NSS_MSK, 1558 rate_n_flags) + 1); 1559 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1560 } else if (format == RATE_MCS_HE_MSK) { 1561 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1562 * but it only matters for radiotap */ 1563 r->idx = 0; 1564 } else { 1565 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1566 band); 1567 } 1568} 1569 1570void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags, 1571 enum nl80211_band band, 1572 struct ieee80211_tx_rate *r) 1573{ 1574 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1575 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1576 1577 r->flags |= 1578 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1579 RATE_MCS_CHAN_WIDTH_MSK_V1); 1580 1581 if (rate_n_flags & RATE_MCS_SGI_MSK_V1) 1582 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1583 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 1584 r->flags |= IEEE80211_TX_RC_MCS; 1585 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 1586 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 1587 ieee80211_rate_set_vht( 1588 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1589 FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1); 1590 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1591 } else { 1592 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1593 band); 1594 } 1595} 1596 1597/* 1598 * translate ucode response to mac80211 tx status control values 1599 */ 1600static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw, 1601 u32 rate_n_flags, 1602 struct ieee80211_tx_info *info) 1603{ 1604 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1605 1606 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP, 1607 TX_CMD, 0) <= 6) 1608 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1609 1610 info->status.antenna = 1611 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1612 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, 1613 info->band, r); 1614} 1615 1616static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1617 u32 status, __le16 frame_control) 1618{ 1619 struct iwl_fw_dbg_trigger_tlv *trig; 1620 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1621 int i; 1622 1623 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1624 enum iwl_fw_ini_time_point tp = 1625 IWL_FW_INI_TIME_POINT_TX_FAILED; 1626 1627 if (ieee80211_is_action(frame_control)) 1628 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1629 1630 iwl_dbg_tlv_time_point(&mvm->fwrt, 1631 tp, NULL); 1632 return; 1633 } 1634 1635 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1636 FW_DBG_TRIGGER_TX_STATUS); 1637 if (!trig) 1638 return; 1639 1640 status_trig = (void *)trig->data; 1641 1642 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1643 /* don't collect on status 0 */ 1644 if (!status_trig->statuses[i].status) 1645 break; 1646 1647 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1648 continue; 1649 1650 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1651 "Tx status %d was received", 1652 status & TX_STATUS_MSK); 1653 break; 1654 } 1655} 1656 1657/* 1658 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1659 * @tx_resp: the Tx response from the fw (agg or non-agg) 1660 * 1661 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1662 * it can't know that everything will go well until the end of the AMPDU, it 1663 * can't know in advance the number of MPDUs that will be sent in the current 1664 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1665 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1666 * of the batch. This is why the SSN of the SCD is written at the end of the 1667 * whole struct at a variable offset. This function knows how to cope with the 1668 * variable offset and returns the SSN of the SCD. 1669 * 1670 * For 22000-series and lower, this is just 12 bits. For later, 16 bits. 1671 */ 1672static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1673 struct iwl_mvm_tx_resp *tx_resp) 1674{ 1675 u32 val = le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1676 tx_resp->frame_count); 1677 1678 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 1679 return val & 0xFFFF; 1680 return val & 0xFFF; 1681} 1682 1683static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1684 struct iwl_rx_packet *pkt) 1685{ 1686 struct ieee80211_sta *sta; 1687 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1688 int txq_id = SEQ_TO_QUEUE(sequence); 1689 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1690 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1691 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1692 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1693 struct agg_tx_status *agg_status = 1694 iwl_mvm_get_agg_status(mvm, tx_resp); 1695 u32 status = le16_to_cpu(agg_status->status); 1696 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1697 struct sk_buff_head skbs; 1698 u8 skb_freed = 0; 1699 u8 lq_color; 1700 u16 next_reclaimed, seq_ctl; 1701 bool is_ndp = false; 1702 1703 __skb_queue_head_init(&skbs); 1704 1705 if (iwl_mvm_has_new_tx_api(mvm)) 1706 txq_id = le16_to_cpu(tx_resp->tx_queue); 1707 1708 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1709 1710 /* we can free until ssn % q.n_bd not inclusive */ 1711 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false); 1712 1713 while (!skb_queue_empty(&skbs)) { 1714 struct sk_buff *skb = __skb_dequeue(&skbs); 1715 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1716 struct ieee80211_hdr *hdr = (void *)skb->data; 1717 bool flushed = false; 1718 1719 skb_freed++; 1720 1721 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1722 1723 memset(&info->status, 0, sizeof(info->status)); 1724 info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED); 1725 1726 /* inform mac80211 about what happened with the frame */ 1727 switch (status & TX_STATUS_MSK) { 1728 case TX_STATUS_SUCCESS: 1729 case TX_STATUS_DIRECT_DONE: 1730 info->flags |= IEEE80211_TX_STAT_ACK; 1731 break; 1732 case TX_STATUS_FAIL_FIFO_FLUSHED: 1733 case TX_STATUS_FAIL_DRAIN_FLOW: 1734 flushed = true; 1735 break; 1736 case TX_STATUS_FAIL_DEST_PS: 1737 /* the FW should have stopped the queue and not 1738 * return this status 1739 */ 1740 IWL_ERR_LIMIT(mvm, 1741 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1742 status, le16_to_cpu(hdr->frame_control)); 1743 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1744 break; 1745 default: 1746 break; 1747 } 1748 1749 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1750 ieee80211_is_mgmt(hdr->frame_control)) 1751 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1752 1753 /* 1754 * If we are freeing multiple frames, mark all the frames 1755 * but the first one as acked, since they were acknowledged 1756 * before 1757 * */ 1758 if (skb_freed > 1) 1759 info->flags |= IEEE80211_TX_STAT_ACK; 1760 1761 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1762 1763 info->status.rates[0].count = tx_resp->failure_frame + 1; 1764 1765 iwl_mvm_hwrate_to_tx_status(mvm->fw, 1766 le32_to_cpu(tx_resp->initial_rate), 1767 info); 1768 1769 /* Don't assign the converted initial_rate, because driver 1770 * TLC uses this and doesn't support the new FW rate 1771 */ 1772 info->status.status_driver_data[1] = 1773 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1774 1775 /* Single frame failure in an AMPDU queue => send BAR */ 1776 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1777 !(info->flags & IEEE80211_TX_STAT_ACK) && 1778 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1779 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1780 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1781 1782 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1783 if (ieee80211_is_back_req(hdr->frame_control)) 1784 seq_ctl = 0; 1785 else if (status != TX_STATUS_SUCCESS) 1786 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1787 1788 if (unlikely(!seq_ctl)) { 1789 /* 1790 * If it is an NDP, we can't update next_reclaim since 1791 * its sequence control is 0. Note that for that same 1792 * reason, NDPs are never sent to A-MPDU'able queues 1793 * so that we can never have more than one freed frame 1794 * for a single Tx resonse (see WARN_ON below). 1795 */ 1796 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1797 is_ndp = true; 1798 } 1799 1800 /* 1801 * TODO: this is not accurate if we are freeing more than one 1802 * packet. 1803 */ 1804 info->status.tx_time = 1805 le16_to_cpu(tx_resp->wireless_media_time); 1806 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1807 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1808 info->status.status_driver_data[0] = 1809 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1810 1811 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1))) 1812 ieee80211_tx_status_skb(mvm->hw, skb); 1813 } 1814 1815 /* This is an aggregation queue or might become one, so we use 1816 * the ssn since: ssn = wifi seq_num % 256. 1817 * The seq_ctl is the sequence control of the packet to which 1818 * this Tx response relates. But if there is a hole in the 1819 * bitmap of the BA we received, this Tx response may allow to 1820 * reclaim the hole and all the subsequent packets that were 1821 * already acked. In that case, seq_ctl != ssn, and the next 1822 * packet to be reclaimed will be ssn and not seq_ctl. In that 1823 * case, several packets will be reclaimed even if 1824 * frame_count = 1. 1825 * 1826 * The ssn is the index (% 256) of the latest packet that has 1827 * treated (acked / dropped) + 1. 1828 */ 1829 next_reclaimed = ssn; 1830 1831 IWL_DEBUG_TX_REPLY(mvm, 1832 "TXQ %d status %s (0x%08x)\n", 1833 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1834 1835 IWL_DEBUG_TX_REPLY(mvm, 1836 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1837 le32_to_cpu(tx_resp->initial_rate), 1838 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1839 ssn, next_reclaimed, seq_ctl); 1840 1841 rcu_read_lock(); 1842 1843 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1844 /* 1845 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1846 * the firmware while we still have packets for it in the Tx queues. 1847 */ 1848 if (WARN_ON_ONCE(!sta)) 1849 goto out; 1850 1851 if (!IS_ERR(sta)) { 1852 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1853 1854 iwl_mvm_tx_airtime(mvm, mvmsta, 1855 le16_to_cpu(tx_resp->wireless_media_time)); 1856 1857 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1858 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1859 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1860 1861 if (sta->wme && tid != IWL_MGMT_TID) { 1862 struct iwl_mvm_tid_data *tid_data = 1863 &mvmsta->tid_data[tid]; 1864 bool send_eosp_ndp = false; 1865 1866 spin_lock_bh(&mvmsta->lock); 1867 1868 if (!is_ndp) { 1869 tid_data->next_reclaimed = next_reclaimed; 1870 IWL_DEBUG_TX_REPLY(mvm, 1871 "Next reclaimed packet:%d\n", 1872 next_reclaimed); 1873 } else { 1874 IWL_DEBUG_TX_REPLY(mvm, 1875 "NDP - don't update next_reclaimed\n"); 1876 } 1877 1878 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1879 1880 if (mvmsta->sleep_tx_count) { 1881 mvmsta->sleep_tx_count--; 1882 if (mvmsta->sleep_tx_count && 1883 !iwl_mvm_tid_queued(mvm, tid_data)) { 1884 /* 1885 * The number of frames in the queue 1886 * dropped to 0 even if we sent less 1887 * frames than we thought we had on the 1888 * Tx queue. 1889 * This means we had holes in the BA 1890 * window that we just filled, ask 1891 * mac80211 to send EOSP since the 1892 * firmware won't know how to do that. 1893 * Send NDP and the firmware will send 1894 * EOSP notification that will trigger 1895 * a call to ieee80211_sta_eosp(). 1896 */ 1897 send_eosp_ndp = true; 1898 } 1899 } 1900 1901 spin_unlock_bh(&mvmsta->lock); 1902 if (send_eosp_ndp) { 1903 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1904 IEEE80211_FRAME_RELEASE_UAPSD, 1905 1, tid, false, false); 1906 mvmsta->sleep_tx_count = 0; 1907 ieee80211_send_eosp_nullfunc(sta, tid); 1908 } 1909 } 1910 1911 if (mvmsta->next_status_eosp) { 1912 mvmsta->next_status_eosp = false; 1913 ieee80211_sta_eosp(sta); 1914 } 1915 } 1916out: 1917 rcu_read_unlock(); 1918} 1919 1920#ifdef CONFIG_IWLWIFI_DEBUG 1921#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1922static const char *iwl_get_agg_tx_status(u16 status) 1923{ 1924 switch (status & AGG_TX_STATE_STATUS_MSK) { 1925 AGG_TX_STATE_(TRANSMITTED); 1926 AGG_TX_STATE_(UNDERRUN); 1927 AGG_TX_STATE_(BT_PRIO); 1928 AGG_TX_STATE_(FEW_BYTES); 1929 AGG_TX_STATE_(ABORT); 1930 AGG_TX_STATE_(TX_ON_AIR_DROP); 1931 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1932 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1933 AGG_TX_STATE_(SCD_QUERY); 1934 AGG_TX_STATE_(TEST_BAD_CRC32); 1935 AGG_TX_STATE_(RESPONSE); 1936 AGG_TX_STATE_(DUMP_TX); 1937 AGG_TX_STATE_(DELAY_TX); 1938 } 1939 1940 return "UNKNOWN"; 1941} 1942 1943static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1944 struct iwl_rx_packet *pkt) 1945{ 1946 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1947 struct agg_tx_status *frame_status = 1948 iwl_mvm_get_agg_status(mvm, tx_resp); 1949 int i; 1950 bool tirgger_timepoint = false; 1951 1952 for (i = 0; i < tx_resp->frame_count; i++) { 1953 u16 fstatus = le16_to_cpu(frame_status[i].status); 1954 /* In case one frame wasn't transmitted trigger time point */ 1955 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1956 AGG_TX_STATE_TRANSMITTED); 1957 IWL_DEBUG_TX_REPLY(mvm, 1958 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1959 iwl_get_agg_tx_status(fstatus), 1960 fstatus & AGG_TX_STATE_STATUS_MSK, 1961 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1962 AGG_TX_STATE_TRY_CNT_POS, 1963 le16_to_cpu(frame_status[i].sequence)); 1964 } 1965 1966 if (tirgger_timepoint) 1967 iwl_dbg_tlv_time_point(&mvm->fwrt, 1968 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1969 1970} 1971#else 1972static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1973 struct iwl_rx_packet *pkt) 1974{} 1975#endif /* CONFIG_IWLWIFI_DEBUG */ 1976 1977static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1978 struct iwl_rx_packet *pkt) 1979{ 1980 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1981 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1982 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1983 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1984 struct iwl_mvm_sta *mvmsta; 1985 int queue = SEQ_TO_QUEUE(sequence); 1986 struct ieee80211_sta *sta; 1987 1988 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1989 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1990 return; 1991 1992 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1993 1994 rcu_read_lock(); 1995 1996 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1997 1998 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1999 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) { 2000 rcu_read_unlock(); 2001 return; 2002 } 2003 2004 if (!WARN_ON_ONCE(!mvmsta)) { 2005 mvmsta->tid_data[tid].rate_n_flags = 2006 le32_to_cpu(tx_resp->initial_rate); 2007 mvmsta->tid_data[tid].tx_time = 2008 le16_to_cpu(tx_resp->wireless_media_time); 2009 mvmsta->tid_data[tid].lq_color = 2010 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 2011 iwl_mvm_tx_airtime(mvm, mvmsta, 2012 le16_to_cpu(tx_resp->wireless_media_time)); 2013 } 2014 2015 rcu_read_unlock(); 2016} 2017 2018void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2019{ 2020 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2021 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 2022 2023 if (tx_resp->frame_count == 1) 2024 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 2025 else 2026 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 2027} 2028 2029static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 2030 int txq, int index, 2031 struct ieee80211_tx_info *tx_info, u32 rate, 2032 bool is_flush) 2033{ 2034 struct sk_buff_head reclaimed_skbs; 2035 struct iwl_mvm_tid_data *tid_data = NULL; 2036 struct ieee80211_sta *sta; 2037 struct iwl_mvm_sta *mvmsta = NULL; 2038 struct sk_buff *skb; 2039 int freed; 2040 2041 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 2042 tid > IWL_MAX_TID_COUNT, 2043 "sta_id %d tid %d", sta_id, tid)) 2044 return; 2045 2046 rcu_read_lock(); 2047 2048 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 2049 2050 /* Reclaiming frames for a station that has been deleted ? */ 2051 if (WARN_ON_ONCE(!sta)) { 2052 rcu_read_unlock(); 2053 return; 2054 } 2055 2056 __skb_queue_head_init(&reclaimed_skbs); 2057 2058 /* 2059 * Release all TFDs before the SSN, i.e. all TFDs in front of 2060 * block-ack window (we assume that they've been successfully 2061 * transmitted ... if not, it's too late anyway). 2062 */ 2063 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush); 2064 2065 skb_queue_walk(&reclaimed_skbs, skb) { 2066 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2067 2068 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 2069 2070 memset(&info->status, 0, sizeof(info->status)); 2071 /* Packet was transmitted successfully, failures come as single 2072 * frames because before failing a frame the firmware transmits 2073 * it without aggregation at least once. 2074 */ 2075 if (!is_flush) 2076 info->flags |= IEEE80211_TX_STAT_ACK; 2077 else 2078 info->flags &= ~IEEE80211_TX_STAT_ACK; 2079 } 2080 2081 /* 2082 * It's possible to get a BA response after invalidating the rcu (rcu is 2083 * invalidated in order to prevent new Tx from being sent, but there may 2084 * be some frames already in-flight). 2085 * In this case we just want to reclaim, and could skip all the 2086 * sta-dependent stuff since it's in the middle of being removed 2087 * anyways. 2088 */ 2089 if (IS_ERR(sta)) 2090 goto out; 2091 2092 mvmsta = iwl_mvm_sta_from_mac80211(sta); 2093 tid_data = &mvmsta->tid_data[tid]; 2094 2095 if (tid_data->txq_id != txq) { 2096 IWL_ERR(mvm, 2097 "invalid reclaim request: Q %d, tid %d\n", 2098 tid_data->txq_id, tid); 2099 rcu_read_unlock(); 2100 return; 2101 } 2102 2103 spin_lock_bh(&mvmsta->lock); 2104 2105 tid_data->next_reclaimed = index; 2106 2107 iwl_mvm_check_ratid_empty(mvm, sta, tid); 2108 2109 freed = 0; 2110 2111 /* pack lq color from tid_data along the reduced txp */ 2112 tx_info->status.status_driver_data[0] = 2113 RS_DRV_DATA_PACK(tid_data->lq_color, 2114 tx_info->status.status_driver_data[0]); 2115 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 2116 2117 skb_queue_walk(&reclaimed_skbs, skb) { 2118 struct ieee80211_hdr *hdr = (void *)skb->data; 2119 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2120 2121 if (!is_flush) { 2122 if (ieee80211_is_data_qos(hdr->frame_control)) 2123 freed++; 2124 else 2125 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 2126 } 2127 2128 /* this is the first skb we deliver in this batch */ 2129 /* put the rate scaling data there */ 2130 if (freed == 1) { 2131 info->flags |= IEEE80211_TX_STAT_AMPDU; 2132 memcpy(&info->status, &tx_info->status, 2133 sizeof(tx_info->status)); 2134 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info); 2135 } 2136 } 2137 2138 spin_unlock_bh(&mvmsta->lock); 2139 2140 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 2141 * possible (i.e. first MPDU in the aggregation wasn't acked) 2142 * Still it's important to update RS about sent vs. acked. 2143 */ 2144 if (!is_flush && skb_queue_empty(&reclaimed_skbs) && 2145 !iwl_mvm_has_tlc_offload(mvm)) { 2146 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 2147 2148 /* no TLC offload, so non-MLD mode */ 2149 if (mvmsta->vif) 2150 chanctx_conf = 2151 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf); 2152 2153 if (WARN_ON_ONCE(!chanctx_conf)) 2154 goto out; 2155 2156 tx_info->band = chanctx_conf->def.chan->band; 2157 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info); 2158 2159 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 2160 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 2161 } 2162 2163out: 2164 rcu_read_unlock(); 2165 2166 while (!skb_queue_empty(&reclaimed_skbs)) { 2167 skb = __skb_dequeue(&reclaimed_skbs); 2168 ieee80211_tx_status_skb(mvm->hw, skb); 2169 } 2170} 2171 2172void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2173{ 2174 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2175 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 2176 int sta_id, tid, txq, index; 2177 struct ieee80211_tx_info ba_info = {}; 2178 struct iwl_mvm_ba_notif *ba_notif; 2179 struct iwl_mvm_tid_data *tid_data; 2180 struct iwl_mvm_sta *mvmsta; 2181 2182 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 2183 2184 if (iwl_mvm_has_new_tx_api(mvm)) { 2185 struct iwl_mvm_compressed_ba_notif *ba_res = 2186 (void *)pkt->data; 2187 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 2188 u16 tfd_cnt; 2189 int i; 2190 2191 if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len, 2192 "short BA notification (%d)\n", pkt_len)) 2193 return; 2194 2195 sta_id = ba_res->sta_id; 2196 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 2197 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 2198 ba_info.status.tx_time = 2199 (u16)le32_to_cpu(ba_res->wireless_time); 2200 ba_info.status.status_driver_data[0] = 2201 (void *)(uintptr_t)ba_res->reduced_txp; 2202 2203 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 2204 if (!tfd_cnt) 2205 return; 2206 2207 if (IWL_FW_CHECK(mvm, 2208 struct_size(ba_res, tfd, tfd_cnt) > pkt_len, 2209 "short BA notification (tfds:%d, size:%d)\n", 2210 tfd_cnt, pkt_len)) 2211 return; 2212 2213 IWL_DEBUG_TX_REPLY(mvm, 2214 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2215 sta_id, le32_to_cpu(ba_res->flags), 2216 le16_to_cpu(ba_res->txed), 2217 le16_to_cpu(ba_res->done)); 2218 2219 rcu_read_lock(); 2220 2221 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2222 /* 2223 * It's possible to get a BA response after invalidating the rcu 2224 * (rcu is invalidated in order to prevent new Tx from being 2225 * sent, but there may be some frames already in-flight). 2226 * In this case we just want to reclaim, and could skip all the 2227 * sta-dependent stuff since it's in the middle of being removed 2228 * anyways. 2229 */ 2230 2231 /* Free per TID */ 2232 for (i = 0; i < tfd_cnt; i++) { 2233 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 2234 &ba_res->tfd[i]; 2235 2236 tid = ba_tfd->tid; 2237 if (tid == IWL_MGMT_TID) 2238 tid = IWL_MAX_TID_COUNT; 2239 2240 if (mvmsta) 2241 mvmsta->tid_data[i].lq_color = lq_color; 2242 2243 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 2244 (int)(le16_to_cpu(ba_tfd->q_num)), 2245 le16_to_cpu(ba_tfd->tfd_index), 2246 &ba_info, 2247 le32_to_cpu(ba_res->tx_rate), false); 2248 } 2249 2250 if (mvmsta) 2251 iwl_mvm_tx_airtime(mvm, mvmsta, 2252 le32_to_cpu(ba_res->wireless_time)); 2253 rcu_read_unlock(); 2254 return; 2255 } 2256 2257 ba_notif = (void *)pkt->data; 2258 sta_id = ba_notif->sta_id; 2259 tid = ba_notif->tid; 2260 /* "flow" corresponds to Tx queue */ 2261 txq = le16_to_cpu(ba_notif->scd_flow); 2262 /* "ssn" is start of block-ack Tx window, corresponds to index 2263 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2264 index = le16_to_cpu(ba_notif->scd_ssn); 2265 2266 rcu_read_lock(); 2267 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2268 if (IWL_FW_CHECK(mvm, !mvmsta, 2269 "invalid STA ID %d in BA notif\n", 2270 sta_id)) { 2271 rcu_read_unlock(); 2272 return; 2273 } 2274 2275 tid_data = &mvmsta->tid_data[tid]; 2276 2277 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2278 ba_info.status.ampdu_len = ba_notif->txed; 2279 ba_info.status.tx_time = tid_data->tx_time; 2280 ba_info.status.status_driver_data[0] = 2281 (void *)(uintptr_t)ba_notif->reduced_txp; 2282 2283 rcu_read_unlock(); 2284 2285 IWL_DEBUG_TX_REPLY(mvm, 2286 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2287 ba_notif->sta_addr, ba_notif->sta_id); 2288 2289 IWL_DEBUG_TX_REPLY(mvm, 2290 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2291 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2292 le64_to_cpu(ba_notif->bitmap), txq, index, 2293 ba_notif->txed, ba_notif->txed_2_done); 2294 2295 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2296 ba_notif->reduced_txp); 2297 2298 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2299 tid_data->rate_n_flags, false); 2300} 2301 2302/* 2303 * Note that there are transports that buffer frames before they reach 2304 * the firmware. This means that after flush_tx_path is called, the 2305 * queue might not be empty. The race-free way to handle this is to: 2306 * 1) set the station as draining 2307 * 2) flush the Tx path 2308 * 3) wait for the transport queues to be empty 2309 */ 2310int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2311{ 2312 int ret; 2313 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2314 .queues_ctl = cpu_to_le32(tfd_msk), 2315 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2316 }; 2317 2318 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2319 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2320 sizeof(flush_cmd), &flush_cmd); 2321 if (ret) 2322 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2323 return ret; 2324} 2325 2326int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2327{ 2328 int ret; 2329 struct iwl_tx_path_flush_cmd_rsp *rsp; 2330 struct iwl_tx_path_flush_cmd flush_cmd = { 2331 .sta_id = cpu_to_le32(sta_id), 2332 .tid_mask = cpu_to_le16(tids), 2333 }; 2334 2335 struct iwl_host_cmd cmd = { 2336 .id = TXPATH_FLUSH, 2337 .len = { sizeof(flush_cmd), }, 2338 .data = { &flush_cmd, }, 2339 }; 2340 2341 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2342 2343 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2344 cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL; 2345 2346 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2347 sta_id, tids); 2348 2349 ret = iwl_mvm_send_cmd(mvm, &cmd); 2350 2351 if (ret) { 2352 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2353 return ret; 2354 } 2355 2356 if (cmd.flags & CMD_WANT_SKB) { 2357 int i; 2358 int num_flushed_queues; 2359 2360 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2361 ret = -EIO; 2362 goto free_rsp; 2363 } 2364 2365 rsp = (void *)cmd.resp_pkt->data; 2366 2367 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2368 "sta_id %d != rsp_sta_id %d", 2369 sta_id, le16_to_cpu(rsp->sta_id))) { 2370 ret = -EIO; 2371 goto free_rsp; 2372 } 2373 2374 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2375 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2376 "num_flushed_queues %d", num_flushed_queues)) { 2377 ret = -EIO; 2378 goto free_rsp; 2379 } 2380 2381 for (i = 0; i < num_flushed_queues; i++) { 2382 struct ieee80211_tx_info tx_info = {}; 2383 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2384 int tid = le16_to_cpu(queue_info->tid); 2385 int read_before = le16_to_cpu(queue_info->read_before_flush); 2386 int read_after = le16_to_cpu(queue_info->read_after_flush); 2387 int queue_num = le16_to_cpu(queue_info->queue_num); 2388 2389 if (tid == IWL_MGMT_TID) 2390 tid = IWL_MAX_TID_COUNT; 2391 2392 IWL_DEBUG_TX_QUEUES(mvm, 2393 "tid %d queue_id %d read-before %d read-after %d\n", 2394 tid, queue_num, read_before, read_after); 2395 2396 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2397 &tx_info, 0, true); 2398 } 2399free_rsp: 2400 iwl_free_resp(&cmd); 2401 } 2402 return ret; 2403} 2404 2405int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask) 2406{ 2407 if (iwl_mvm_has_new_tx_api(mvm)) 2408 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff); 2409 2410 return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask); 2411} 2412