1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2022 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 20 static void 21 iwl_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 44 static u16 iwl_mvm_tx_csum_pre_bz(struct iwl_mvm *mvm, struct sk_buff *skb, 45 struct ieee80211_tx_info *info, bool amsdu) 46 { 47 struct ieee80211_hdr *hdr = (void *)skb->data; 48 u16 offload_assist = 0; 49 #if IS_ENABLED(CONFIG_INET) 50 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 51 u8 protocol = 0; 52 53 /* Do not compute checksum if already computed */ 54 if (skb->ip_summed != CHECKSUM_PARTIAL) 55 goto out; 56 57 /* We do not expect to be requested to csum stuff we do not support */ 58 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 59 (skb->protocol != htons(ETH_P_IP) && 60 skb->protocol != htons(ETH_P_IPV6)), 61 "No support for requested checksum\n")) { 62 skb_checksum_help(skb); 63 goto out; 64 } 65 66 if (skb->protocol == htons(ETH_P_IP)) { 67 protocol = ip_hdr(skb)->protocol; 68 } else { 69 #if IS_ENABLED(CONFIG_IPV6) 70 struct ipv6hdr *ipv6h = 71 (struct ipv6hdr *)skb_network_header(skb); 72 unsigned int off = sizeof(*ipv6h); 73 74 protocol = ipv6h->nexthdr; 75 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 76 struct ipv6_opt_hdr *hp; 77 78 /* only supported extension headers */ 79 if (protocol != NEXTHDR_ROUTING && 80 protocol != NEXTHDR_HOP && 81 protocol != NEXTHDR_DEST) { 82 skb_checksum_help(skb); 83 goto out; 84 } 85 86 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 87 protocol = hp->nexthdr; 88 off += ipv6_optlen(hp); 89 } 90 /* if we get here - protocol now should be TCP/UDP */ 91 #endif 92 } 93 94 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 95 WARN_ON_ONCE(1); 96 skb_checksum_help(skb); 97 goto out; 98 } 99 100 /* enable L4 csum */ 101 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 102 103 /* 104 * Set offset to IP header (snap). 105 * We don't support tunneling so no need to take care of inner header. 106 * Size is in words. 107 */ 108 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 109 110 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 111 if (skb->protocol == htons(ETH_P_IP) && amsdu) { 112 ip_hdr(skb)->check = 0; 113 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 114 } 115 116 /* reset UDP/TCP header csum */ 117 if (protocol == IPPROTO_TCP) 118 tcp_hdr(skb)->check = 0; 119 else 120 udp_hdr(skb)->check = 0; 121 122 /* 123 * mac header len should include IV, size is in words unless 124 * the IV is added by the firmware like in WEP. 125 * In new Tx API, the IV is always added by the firmware. 126 */ 127 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 128 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 129 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 130 mh_len += info->control.hw_key->iv_len; 131 mh_len /= 2; 132 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 133 134 out: 135 #endif 136 if (amsdu) 137 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 138 else if (ieee80211_hdrlen(hdr->frame_control) % 4) 139 /* padding is inserted later in transport */ 140 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 141 142 return offload_assist; 143 } 144 145 u32 iwl_mvm_tx_csum_bz(struct iwl_mvm *mvm, struct sk_buff *skb, bool amsdu) 146 { 147 struct ieee80211_hdr *hdr = (void *)skb->data; 148 u32 offload_assist = IWL_TX_CMD_OFFLD_BZ_PARTIAL_CSUM; 149 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 150 unsigned int csum_start = skb_checksum_start_offset(skb); 151 152 offload_assist |= u32_encode_bits(hdrlen / 2, 153 IWL_TX_CMD_OFFLD_BZ_MH_LEN); 154 if (amsdu) 155 offload_assist |= IWL_TX_CMD_OFFLD_BZ_AMSDU; 156 else if (hdrlen % 4) 157 /* padding is inserted later in transport */ 158 offload_assist |= IWL_TX_CMD_OFFLD_BZ_MH_PAD; 159 160 if (skb->ip_summed != CHECKSUM_PARTIAL) 161 return offload_assist; 162 163 offload_assist |= IWL_TX_CMD_OFFLD_BZ_ENABLE_CSUM | 164 IWL_TX_CMD_OFFLD_BZ_ZERO2ONES; 165 166 /* 167 * mac80211 will always calculate checksum in software for 168 * non-fast-xmit, and so we can only do offloaded checksum 169 * for fast-xmit frames. In this case, we always have the 170 * RFC 1042 header present. skb_checksum_start_offset() 171 * returns the offset from the beginning, but the hardware 172 * needs it from after the header & SNAP header. 173 */ 174 csum_start -= hdrlen + 8; 175 176 offload_assist |= u32_encode_bits(csum_start, 177 IWL_TX_CMD_OFFLD_BZ_START_OFFS); 178 offload_assist |= u32_encode_bits(csum_start + skb->csum_offset, 179 IWL_TX_CMD_OFFLD_BZ_RESULT_OFFS); 180 181 return offload_assist; 182 } 183 184 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 185 struct ieee80211_tx_info *info, 186 bool amsdu) 187 { 188 if (!iwl_mvm_has_new_tx_csum(mvm)) 189 return iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu); 190 return iwl_mvm_tx_csum_bz(mvm, skb, amsdu); 191 } 192 193 /* 194 * Sets most of the Tx cmd's fields 195 */ 196 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 197 struct iwl_tx_cmd *tx_cmd, 198 struct ieee80211_tx_info *info, u8 sta_id) 199 { 200 struct ieee80211_hdr *hdr = (void *)skb->data; 201 __le16 fc = hdr->frame_control; 202 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 203 u32 len = skb->len + FCS_LEN; 204 bool amsdu = false; 205 u8 ac; 206 207 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) || 208 (ieee80211_is_probe_resp(fc) && 209 !is_multicast_ether_addr(hdr->addr1))) 210 tx_flags |= TX_CMD_FLG_ACK; 211 else 212 tx_flags &= ~TX_CMD_FLG_ACK; 213 214 if (ieee80211_is_probe_resp(fc)) 215 tx_flags |= TX_CMD_FLG_TSF; 216 217 if (ieee80211_has_morefrags(fc)) 218 tx_flags |= TX_CMD_FLG_MORE_FRAG; 219 220 if (ieee80211_is_data_qos(fc)) { 221 u8 *qc = ieee80211_get_qos_ctl(hdr); 222 tx_cmd->tid_tspec = qc[0] & 0xf; 223 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 224 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 225 } else if (ieee80211_is_back_req(fc)) { 226 struct ieee80211_bar *bar = (void *)skb->data; 227 u16 control = le16_to_cpu(bar->control); 228 u16 ssn = le16_to_cpu(bar->start_seq_num); 229 230 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 231 tx_cmd->tid_tspec = (control & 232 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 233 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 234 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 235 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 236 ssn); 237 } else { 238 if (ieee80211_is_data(fc)) 239 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 240 else 241 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT; 242 243 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 244 tx_flags |= TX_CMD_FLG_SEQ_CTL; 245 else 246 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 247 } 248 249 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */ 250 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 251 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 252 else 253 ac = tid_to_mac80211_ac[0]; 254 255 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 256 TX_CMD_FLG_BT_PRIO_POS; 257 258 if (ieee80211_is_mgmt(fc)) { 259 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 260 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 261 else if (ieee80211_is_action(fc)) 262 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 263 else 264 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 265 266 /* The spec allows Action frames in A-MPDU, we don't support 267 * it 268 */ 269 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 270 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 271 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 272 } else { 273 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 274 } 275 276 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 277 !is_multicast_ether_addr(hdr->addr1)) 278 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 279 280 if (fw_has_capa(&mvm->fw->ucode_capa, 281 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 282 ieee80211_action_contains_tpc(skb)) 283 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 284 285 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 286 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 287 tx_cmd->len = cpu_to_le16((u16)skb->len); 288 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 289 tx_cmd->sta_id = sta_id; 290 291 tx_cmd->offload_assist = 292 cpu_to_le16(iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu)); 293 } 294 295 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, 296 struct ieee80211_tx_info *info, 297 struct ieee80211_sta *sta, __le16 fc) 298 { 299 if (info->band == NL80211_BAND_2GHZ && 300 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 301 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 302 303 if (sta && ieee80211_is_data(fc)) { 304 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 305 306 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS; 307 } 308 309 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 310 } 311 312 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm, 313 struct ieee80211_tx_info *info) 314 { 315 struct ieee80211_tx_rate *rate = &info->control.rates[0]; 316 u32 result; 317 318 /* 319 * we only care about legacy/HT/VHT so far, so we can 320 * build in v1 and use iwl_new_rate_from_v1() 321 */ 322 323 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { 324 u8 mcs = ieee80211_rate_get_vht_mcs(rate); 325 u8 nss = ieee80211_rate_get_vht_nss(rate); 326 327 result = RATE_MCS_VHT_MSK_V1; 328 result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK); 329 result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK); 330 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 331 result |= RATE_MCS_SGI_MSK_V1; 332 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 333 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 334 else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 335 result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1); 336 else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 337 result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1); 338 } else if (rate->flags & IEEE80211_TX_RC_MCS) { 339 result = RATE_MCS_HT_MSK_V1; 340 result |= u32_encode_bits(rate->idx, 341 RATE_HT_MCS_RATE_CODE_MSK_V1 | 342 RATE_HT_MCS_NSS_MSK_V1); 343 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 344 result |= RATE_MCS_SGI_MSK_V1; 345 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 346 result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1); 347 if (rate->flags & IEEE80211_TX_CTL_LDPC) 348 result |= RATE_MCS_LDPC_MSK_V1; 349 if (u32_get_bits(rate->flags, IEEE80211_TX_CTL_STBC)) 350 result |= RATE_MCS_STBC_MSK; 351 } else { 352 return 0; 353 } 354 355 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6) 356 return iwl_new_rate_from_v1(result); 357 return result; 358 } 359 360 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 361 struct ieee80211_tx_info *info, 362 struct ieee80211_sta *sta, __le16 fc) 363 { 364 int rate_idx = -1; 365 u8 rate_plcp; 366 u32 rate_flags = 0; 367 bool is_cck; 368 369 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) { 370 u32 result = iwl_mvm_get_inject_tx_rate(mvm, info); 371 372 if (result) 373 return result; 374 rate_idx = info->control.rates[0].idx; 375 } else if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) { 376 /* info->control is only relevant for non HW rate control */ 377 378 /* HT rate doesn't make sense for a non data frame */ 379 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS && 380 !ieee80211_is_data(fc), 381 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n", 382 info->control.rates[0].flags, 383 info->control.rates[0].idx, 384 le16_to_cpu(fc), 385 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1); 386 387 rate_idx = info->control.rates[0].idx; 388 389 /* For non 2 GHZ band, remap mac80211 rate indices into driver 390 * indices. 391 */ 392 if (info->band != NL80211_BAND_2GHZ || 393 (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE)) 394 rate_idx += IWL_FIRST_OFDM_RATE; 395 396 /* For 2.4 GHZ band, check that there is no need to remap */ 397 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 398 } 399 400 /* if the rate isn't a well known legacy rate, take the lowest one */ 401 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 402 rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm, 403 info, 404 info->control.vif); 405 406 /* Get PLCP rate for tx_cmd->rate_n_flags */ 407 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx); 408 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE); 409 410 /* Set CCK or OFDM flag */ 411 if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) { 412 if (!is_cck) 413 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK; 414 else 415 rate_flags |= RATE_MCS_CCK_MSK; 416 } else if (is_cck) { 417 rate_flags |= RATE_MCS_CCK_MSK_V1; 418 } 419 420 return (u32)rate_plcp | rate_flags; 421 } 422 423 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 424 struct ieee80211_tx_info *info, 425 struct ieee80211_sta *sta, __le16 fc) 426 { 427 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) | 428 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 429 } 430 431 /* 432 * Sets the fields in the Tx cmd that are rate related 433 */ 434 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 435 struct ieee80211_tx_info *info, 436 struct ieee80211_sta *sta, __le16 fc) 437 { 438 /* Set retry limit on RTS packets */ 439 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 440 441 /* Set retry limit on DATA packets and Probe Responses*/ 442 if (ieee80211_is_probe_resp(fc)) { 443 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 444 tx_cmd->rts_retry_limit = 445 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 446 } else if (ieee80211_is_back_req(fc)) { 447 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 448 } else { 449 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 450 } 451 452 /* 453 * for data packets, rate info comes from the table inside the fw. This 454 * table is controlled by LINK_QUALITY commands 455 */ 456 457 if (likely(ieee80211_is_data(fc) && sta && 458 !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) { 459 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 460 461 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 462 tx_cmd->initial_rate_index = 0; 463 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 464 return; 465 } 466 } else if (ieee80211_is_back_req(fc)) { 467 tx_cmd->tx_flags |= 468 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 469 } 470 471 /* Set the rate in the TX cmd */ 472 tx_cmd->rate_n_flags = 473 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 474 } 475 476 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 477 u8 *crypto_hdr) 478 { 479 struct ieee80211_key_conf *keyconf = info->control.hw_key; 480 u64 pn; 481 482 pn = atomic64_inc_return(&keyconf->tx_pn); 483 crypto_hdr[0] = pn; 484 crypto_hdr[2] = 0; 485 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 486 crypto_hdr[1] = pn >> 8; 487 crypto_hdr[4] = pn >> 16; 488 crypto_hdr[5] = pn >> 24; 489 crypto_hdr[6] = pn >> 32; 490 crypto_hdr[7] = pn >> 40; 491 } 492 493 /* 494 * Sets the fields in the Tx cmd that are crypto related 495 */ 496 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 497 struct ieee80211_tx_info *info, 498 struct iwl_tx_cmd *tx_cmd, 499 struct sk_buff *skb_frag, 500 int hdrlen) 501 { 502 struct ieee80211_key_conf *keyconf = info->control.hw_key; 503 u8 *crypto_hdr = skb_frag->data + hdrlen; 504 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 505 u64 pn; 506 507 switch (keyconf->cipher) { 508 case WLAN_CIPHER_SUITE_CCMP: 509 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 510 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 511 break; 512 513 case WLAN_CIPHER_SUITE_TKIP: 514 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 515 pn = atomic64_inc_return(&keyconf->tx_pn); 516 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 517 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 518 break; 519 520 case WLAN_CIPHER_SUITE_WEP104: 521 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 522 fallthrough; 523 case WLAN_CIPHER_SUITE_WEP40: 524 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 525 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 526 TX_CMD_SEC_WEP_KEY_IDX_MSK); 527 528 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 529 break; 530 case WLAN_CIPHER_SUITE_GCMP: 531 case WLAN_CIPHER_SUITE_GCMP_256: 532 type = TX_CMD_SEC_GCMP; 533 fallthrough; 534 case WLAN_CIPHER_SUITE_CCMP_256: 535 /* TODO: Taking the key from the table might introduce a race 536 * when PTK rekeying is done, having an old packets with a PN 537 * based on the old key but the message encrypted with a new 538 * one. 539 * Need to handle this. 540 */ 541 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 542 tx_cmd->key[0] = keyconf->hw_key_idx; 543 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 544 break; 545 default: 546 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 547 } 548 } 549 550 /* 551 * Allocates and sets the Tx cmd the driver data pointers in the skb 552 */ 553 static struct iwl_device_tx_cmd * 554 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 555 struct ieee80211_tx_info *info, int hdrlen, 556 struct ieee80211_sta *sta, u8 sta_id) 557 { 558 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 559 struct iwl_device_tx_cmd *dev_cmd; 560 struct iwl_tx_cmd *tx_cmd; 561 562 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 563 564 if (unlikely(!dev_cmd)) 565 return NULL; 566 567 dev_cmd->hdr.cmd = TX_CMD; 568 569 if (iwl_mvm_has_new_tx_api(mvm)) { 570 u32 rate_n_flags = 0; 571 u16 flags = 0; 572 struct iwl_mvm_sta *mvmsta = sta ? 573 iwl_mvm_sta_from_mac80211(sta) : NULL; 574 bool amsdu = false; 575 576 if (ieee80211_is_data_qos(hdr->frame_control)) { 577 u8 *qc = ieee80211_get_qos_ctl(hdr); 578 579 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT; 580 } 581 582 if (!info->control.hw_key) 583 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 584 585 /* 586 * For data packets rate info comes from the fw. Only 587 * set rate/antenna during connection establishment or in case 588 * no station is given. 589 */ 590 if (!sta || !ieee80211_is_data(hdr->frame_control) || 591 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 592 flags |= IWL_TX_FLAGS_CMD_RATE; 593 rate_n_flags = 594 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 595 hdr->frame_control); 596 } 597 598 if (mvm->trans->trans_cfg->device_family >= 599 IWL_DEVICE_FAMILY_AX210) { 600 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 601 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb, 602 info, amsdu); 603 604 cmd->offload_assist = cpu_to_le32(offload_assist); 605 606 /* Total # bytes to be transmitted */ 607 cmd->len = cpu_to_le16((u16)skb->len); 608 609 /* Copy MAC header from skb into command buffer */ 610 memcpy(cmd->hdr, hdr, hdrlen); 611 612 cmd->flags = cpu_to_le16(flags); 613 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 614 } else { 615 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 616 u16 offload_assist = iwl_mvm_tx_csum_pre_bz(mvm, skb, 617 info, 618 amsdu); 619 620 cmd->offload_assist = cpu_to_le16(offload_assist); 621 622 /* Total # bytes to be transmitted */ 623 cmd->len = cpu_to_le16((u16)skb->len); 624 625 /* Copy MAC header from skb into command buffer */ 626 memcpy(cmd->hdr, hdr, hdrlen); 627 628 cmd->flags = cpu_to_le32(flags); 629 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 630 } 631 goto out; 632 } 633 634 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 635 636 if (info->control.hw_key) 637 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 638 639 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 640 641 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 642 643 /* Copy MAC header from skb into command buffer */ 644 memcpy(tx_cmd->hdr, hdr, hdrlen); 645 646 out: 647 return dev_cmd; 648 } 649 650 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 651 struct iwl_device_tx_cmd *cmd) 652 { 653 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 654 655 memset(&skb_info->status, 0, sizeof(skb_info->status)); 656 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 657 658 skb_info->driver_data[1] = cmd; 659 } 660 661 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 662 struct iwl_mvm_vif_link_info *link, 663 struct ieee80211_tx_info *info, 664 struct sk_buff *skb) 665 { 666 struct ieee80211_hdr *hdr = (void *)skb->data; 667 __le16 fc = hdr->frame_control; 668 669 switch (info->control.vif->type) { 670 case NL80211_IFTYPE_AP: 671 case NL80211_IFTYPE_ADHOC: 672 /* 673 * Non-bufferable frames use the broadcast station, thus they 674 * use the probe queue. 675 * Also take care of the case where we send a deauth to a 676 * station that we don't have, or similarly an association 677 * response (with non-success status) for a station we can't 678 * accept. 679 * Also, disassociate frames might happen, particular with 680 * reason 7 ("Class 3 frame received from nonassociated STA"). 681 */ 682 if (ieee80211_is_mgmt(fc) && 683 (!ieee80211_is_bufferable_mmpdu(skb) || 684 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 685 return link->mgmt_queue; 686 687 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 688 is_multicast_ether_addr(hdr->addr1)) 689 return link->cab_queue; 690 691 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 692 "fc=0x%02x", le16_to_cpu(fc)); 693 return link->mgmt_queue; 694 case NL80211_IFTYPE_P2P_DEVICE: 695 if (ieee80211_is_mgmt(fc)) 696 return mvm->p2p_dev_queue; 697 698 WARN_ON_ONCE(1); 699 return mvm->p2p_dev_queue; 700 default: 701 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 702 return -1; 703 } 704 } 705 706 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 707 struct sk_buff *skb) 708 { 709 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 710 struct iwl_mvm_vif *mvmvif = 711 iwl_mvm_vif_from_mac80211(info->control.vif); 712 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 713 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 714 struct iwl_probe_resp_data *resp_data; 715 const u8 *ie; 716 u8 *pos; 717 u8 match[] = { 718 (WLAN_OUI_WFA >> 16) & 0xff, 719 (WLAN_OUI_WFA >> 8) & 0xff, 720 WLAN_OUI_WFA & 0xff, 721 WLAN_OUI_TYPE_WFA_P2P, 722 }; 723 724 rcu_read_lock(); 725 726 resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data); 727 if (!resp_data) 728 goto out; 729 730 if (!resp_data->notif.noa_active) 731 goto out; 732 733 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 734 mgmt->u.probe_resp.variable, 735 skb->len - base_len, 736 match, 4, 2); 737 if (!ie) { 738 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 739 goto out; 740 } 741 742 if (skb_tailroom(skb) < resp_data->noa_len) { 743 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 744 IWL_ERR(mvm, 745 "Failed to reallocate probe resp\n"); 746 goto out; 747 } 748 } 749 750 pos = skb_put(skb, resp_data->noa_len); 751 752 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 753 /* Set length of IE body (not including ID and length itself) */ 754 *pos++ = resp_data->noa_len - 2; 755 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 756 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 757 *pos++ = WLAN_OUI_WFA & 0xff; 758 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 759 760 memcpy(pos, &resp_data->notif.noa_attr, 761 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 762 763 out: 764 rcu_read_unlock(); 765 } 766 767 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 768 { 769 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 770 struct ieee80211_tx_info info; 771 struct iwl_device_tx_cmd *dev_cmd; 772 u8 sta_id; 773 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 774 __le16 fc = hdr->frame_control; 775 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 776 IEEE80211_TX_CTL_TX_OFFCHAN; 777 int queue = -1; 778 779 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 780 return -1; 781 782 memcpy(&info, skb->cb, sizeof(info)); 783 784 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 785 return -1; 786 787 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 788 return -1; 789 790 if (info.control.vif) { 791 struct iwl_mvm_vif *mvmvif = 792 iwl_mvm_vif_from_mac80211(info.control.vif); 793 794 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 795 info.control.vif->type == NL80211_IFTYPE_AP || 796 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 797 u32 link_id = u32_get_bits(info.control.flags, 798 IEEE80211_TX_CTRL_MLO_LINK); 799 struct iwl_mvm_vif_link_info *link; 800 801 if (link_id == IEEE80211_LINK_UNSPECIFIED) { 802 if (info.control.vif->active_links) 803 link_id = ffs(info.control.vif->active_links) - 1; 804 else 805 link_id = 0; 806 } 807 808 link = mvmvif->link[link_id]; 809 810 if (!ieee80211_is_data(hdr->frame_control)) 811 sta_id = link->bcast_sta.sta_id; 812 else 813 sta_id = link->mcast_sta.sta_id; 814 815 queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info, 816 skb); 817 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 818 queue = mvm->snif_queue; 819 sta_id = mvm->snif_sta.sta_id; 820 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 821 offchannel) { 822 /* 823 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 824 * that can be used in 2 different types of vifs, P2P & 825 * STATION. 826 * P2P uses the offchannel queue. 827 * STATION (HS2.0) uses the auxiliary context of the FW, 828 * and hence needs to be sent on the aux queue. 829 */ 830 sta_id = mvm->aux_sta.sta_id; 831 queue = mvm->aux_queue; 832 } 833 } 834 835 if (queue < 0) { 836 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 837 return -1; 838 } 839 840 if (unlikely(ieee80211_is_probe_resp(fc))) 841 iwl_mvm_probe_resp_set_noa(mvm, skb); 842 843 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 844 845 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 846 if (!dev_cmd) 847 return -1; 848 849 /* From now on, we cannot access info->control */ 850 iwl_mvm_skb_prepare_status(skb, dev_cmd); 851 852 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 853 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 854 return -1; 855 } 856 857 return 0; 858 } 859 860 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 861 struct ieee80211_sta *sta, unsigned int tid) 862 { 863 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 864 u8 ac = tid_to_mac80211_ac[tid]; 865 enum nl80211_band band; 866 unsigned int txf; 867 unsigned int val; 868 int lmac; 869 870 /* For HE redirect to trigger based fifos */ 871 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 872 ac += 4; 873 874 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 875 876 /* 877 * Don't send an AMSDU that will be longer than the TXF. 878 * Add a security margin of 256 for the TX command + headers. 879 * We also want to have the start of the next packet inside the 880 * fifo to be able to send bursts. 881 */ 882 val = mvmsta->max_amsdu_len; 883 884 if (hweight16(sta->valid_links) <= 1) { 885 if (sta->valid_links) { 886 struct ieee80211_bss_conf *link_conf; 887 unsigned int link = ffs(sta->valid_links) - 1; 888 889 rcu_read_lock(); 890 link_conf = rcu_dereference(mvmsta->vif->link_conf[link]); 891 if (WARN_ON(!link_conf)) 892 band = NL80211_BAND_2GHZ; 893 else 894 band = link_conf->chandef.chan->band; 895 rcu_read_unlock(); 896 } else { 897 band = mvmsta->vif->bss_conf.chandef.chan->band; 898 } 899 900 lmac = iwl_mvm_get_lmac_id(mvm->fw, band); 901 } else if (fw_has_capa(&mvm->fw->ucode_capa, 902 IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) { 903 /* for real MLO restrict to both LMACs if they exist */ 904 lmac = IWL_LMAC_5G_INDEX; 905 val = min_t(unsigned int, val, 906 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 907 lmac = IWL_LMAC_24G_INDEX; 908 } else { 909 lmac = IWL_LMAC_24G_INDEX; 910 } 911 912 return min_t(unsigned int, val, 913 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 914 } 915 916 #ifdef CONFIG_INET 917 918 static int 919 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 920 netdev_features_t netdev_flags, 921 struct sk_buff_head *mpdus_skb) 922 { 923 struct sk_buff *tmp, *next; 924 struct ieee80211_hdr *hdr = (void *)skb->data; 925 char cb[sizeof(skb->cb)]; 926 u16 i = 0; 927 unsigned int tcp_payload_len; 928 unsigned int mss = skb_shinfo(skb)->gso_size; 929 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 930 bool qos = ieee80211_is_data_qos(hdr->frame_control); 931 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 932 933 skb_shinfo(skb)->gso_size = num_subframes * mss; 934 memcpy(cb, skb->cb, sizeof(cb)); 935 936 next = skb_gso_segment(skb, netdev_flags); 937 skb_shinfo(skb)->gso_size = mss; 938 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 939 if (WARN_ON_ONCE(IS_ERR(next))) 940 return -EINVAL; 941 else if (next) 942 consume_skb(skb); 943 944 skb_list_walk_safe(next, tmp, next) { 945 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 946 /* 947 * Compute the length of all the data added for the A-MSDU. 948 * This will be used to compute the length to write in the TX 949 * command. We have: SNAP + IP + TCP for n -1 subframes and 950 * ETH header for n subframes. 951 */ 952 tcp_payload_len = skb_tail_pointer(tmp) - 953 skb_transport_header(tmp) - 954 tcp_hdrlen(tmp) + tmp->data_len; 955 956 if (ipv4) 957 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 958 959 if (tcp_payload_len > mss) { 960 skb_shinfo(tmp)->gso_size = mss; 961 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 : 962 SKB_GSO_TCPV6; 963 } else { 964 if (qos) { 965 u8 *qc; 966 967 if (ipv4) 968 ip_send_check(ip_hdr(tmp)); 969 970 qc = ieee80211_get_qos_ctl((void *)tmp->data); 971 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 972 } 973 skb_shinfo(tmp)->gso_size = 0; 974 } 975 976 skb_mark_not_on_list(tmp); 977 __skb_queue_tail(mpdus_skb, tmp); 978 i++; 979 } 980 981 return 0; 982 } 983 984 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 985 struct ieee80211_tx_info *info, 986 struct ieee80211_sta *sta, 987 struct sk_buff_head *mpdus_skb) 988 { 989 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 990 struct ieee80211_hdr *hdr = (void *)skb->data; 991 unsigned int mss = skb_shinfo(skb)->gso_size; 992 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 993 u16 snap_ip_tcp, pad; 994 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 995 u8 tid; 996 997 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 998 tcp_hdrlen(skb); 999 1000 if (!mvmsta->max_amsdu_len || 1001 !ieee80211_is_data_qos(hdr->frame_control) || 1002 !mvmsta->amsdu_enabled) 1003 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 1004 1005 /* 1006 * Do not build AMSDU for IPv6 with extension headers. 1007 * ask stack to segment and checkum the generated MPDUs for us. 1008 */ 1009 if (skb->protocol == htons(ETH_P_IPV6) && 1010 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 1011 IPPROTO_TCP) { 1012 netdev_flags &= ~NETIF_F_CSUM_MASK; 1013 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 1014 } 1015 1016 tid = ieee80211_get_tid(hdr); 1017 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 1018 return -EINVAL; 1019 1020 /* 1021 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 1022 * during an BA session. 1023 */ 1024 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 1025 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 1026 !(mvmsta->amsdu_enabled & BIT(tid))) 1027 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 1028 1029 /* 1030 * Take the min of ieee80211 station and mvm station 1031 */ 1032 max_amsdu_len = 1033 min_t(unsigned int, sta->cur->max_amsdu_len, 1034 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 1035 1036 /* 1037 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 1038 * supported. This is a spec requirement (IEEE 802.11-2015 1039 * section 8.7.3 NOTE 3). 1040 */ 1041 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1042 !sta->deflink.vht_cap.vht_supported) 1043 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 1044 1045 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 1046 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 1047 pad = (4 - subf_len) & 0x3; 1048 1049 /* 1050 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 1051 * N * subf_len + (N - 1) * pad. 1052 */ 1053 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 1054 1055 if (sta->max_amsdu_subframes && 1056 num_subframes > sta->max_amsdu_subframes) 1057 num_subframes = sta->max_amsdu_subframes; 1058 1059 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1060 tcp_hdrlen(skb) + skb->data_len; 1061 1062 /* 1063 * Make sure we have enough TBs for the A-MSDU: 1064 * 2 for each subframe 1065 * 1 more for each fragment 1066 * 1 more for the potential data in the header 1067 */ 1068 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 1069 mvm->trans->max_skb_frags) 1070 num_subframes = 1; 1071 1072 if (num_subframes > 1) 1073 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 1074 1075 /* This skb fits in one single A-MSDU */ 1076 if (num_subframes * mss >= tcp_payload_len) { 1077 __skb_queue_tail(mpdus_skb, skb); 1078 return 0; 1079 } 1080 1081 /* 1082 * Trick the segmentation function to make it 1083 * create SKBs that can fit into one A-MSDU. 1084 */ 1085 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 1086 mpdus_skb); 1087 } 1088 #else /* CONFIG_INET */ 1089 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 1090 struct ieee80211_tx_info *info, 1091 struct ieee80211_sta *sta, 1092 struct sk_buff_head *mpdus_skb) 1093 { 1094 /* Impossible to get TSO with CONFIG_INET */ 1095 WARN_ON(1); 1096 1097 return -1; 1098 } 1099 #endif 1100 1101 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1102 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1103 { 1104 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1105 unsigned long now = jiffies; 1106 int tid; 1107 1108 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1109 return false; 1110 1111 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1112 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1113 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1114 return true; 1115 } 1116 1117 return false; 1118 } 1119 1120 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1121 struct iwl_mvm_sta *mvmsta, 1122 int airtime) 1123 { 1124 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1125 struct iwl_mvm_tcm_mac *mdata; 1126 1127 if (mac >= NUM_MAC_INDEX_DRIVER) 1128 return; 1129 1130 mdata = &mvm->tcm.data[mac]; 1131 1132 if (mvm->tcm.paused) 1133 return; 1134 1135 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1136 schedule_delayed_work(&mvm->tcm.work, 0); 1137 1138 mdata->tx.airtime += airtime; 1139 } 1140 1141 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1142 struct iwl_mvm_sta *mvmsta, int tid) 1143 { 1144 u32 ac = tid_to_mac80211_ac[tid]; 1145 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1146 struct iwl_mvm_tcm_mac *mdata; 1147 1148 if (mac >= NUM_MAC_INDEX_DRIVER) 1149 return -EINVAL; 1150 1151 mdata = &mvm->tcm.data[mac]; 1152 1153 mdata->tx.pkts[ac]++; 1154 1155 return 0; 1156 } 1157 1158 /* 1159 * Sets the fields in the Tx cmd that are crypto related. 1160 * 1161 * This function must be called with BHs disabled. 1162 */ 1163 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1164 struct ieee80211_tx_info *info, 1165 struct ieee80211_sta *sta) 1166 { 1167 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1168 struct iwl_mvm_sta *mvmsta; 1169 struct iwl_device_tx_cmd *dev_cmd; 1170 __le16 fc; 1171 u16 seq_number = 0; 1172 u8 tid = IWL_MAX_TID_COUNT; 1173 u16 txq_id; 1174 bool is_ampdu = false; 1175 int hdrlen; 1176 1177 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1178 fc = hdr->frame_control; 1179 hdrlen = ieee80211_hdrlen(fc); 1180 1181 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1182 return -1; 1183 1184 if (WARN_ON_ONCE(!mvmsta)) 1185 return -1; 1186 1187 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1188 return -1; 1189 1190 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he) 1191 return -1; 1192 1193 if (unlikely(ieee80211_is_probe_resp(fc))) 1194 iwl_mvm_probe_resp_set_noa(mvm, skb); 1195 1196 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1197 sta, mvmsta->deflink.sta_id); 1198 if (!dev_cmd) 1199 goto drop; 1200 1201 /* 1202 * we handle that entirely ourselves -- for uAPSD the firmware 1203 * will always send a notification, and for PS-Poll responses 1204 * we'll notify mac80211 when getting frame status 1205 */ 1206 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1207 1208 spin_lock(&mvmsta->lock); 1209 1210 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1211 * the conditions of !ieee80211_is_qos_nullfunc(fc) and 1212 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID 1213 */ 1214 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1215 tid = ieee80211_get_tid(hdr); 1216 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1217 goto drop_unlock_sta; 1218 1219 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1220 if (WARN_ONCE(is_ampdu && 1221 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1222 "Invalid internal agg state %d for TID %d", 1223 mvmsta->tid_data[tid].state, tid)) 1224 goto drop_unlock_sta; 1225 1226 seq_number = mvmsta->tid_data[tid].seq_number; 1227 seq_number &= IEEE80211_SCTL_SEQ; 1228 1229 if (!iwl_mvm_has_new_tx_api(mvm)) { 1230 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1231 1232 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1233 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1234 /* update the tx_cmd hdr as it was already copied */ 1235 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1236 } 1237 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) && 1238 !ieee80211_is_nullfunc(fc)) { 1239 tid = IWL_TID_NON_QOS; 1240 } 1241 1242 txq_id = mvmsta->tid_data[tid].txq_id; 1243 1244 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1245 1246 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1247 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1248 spin_unlock(&mvmsta->lock); 1249 return -1; 1250 } 1251 1252 if (!iwl_mvm_has_new_tx_api(mvm)) { 1253 /* Keep track of the time of the last frame for this RA/TID */ 1254 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1255 1256 /* 1257 * If we have timed-out TIDs - schedule the worker that will 1258 * reconfig the queues and update them 1259 * 1260 * Note that the no lock is taken here in order to not serialize 1261 * the TX flow. This isn't dangerous because scheduling 1262 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1263 * schedule it due to some race condition then next TX we get 1264 * here we will. 1265 */ 1266 if (unlikely(mvm->queue_info[txq_id].status == 1267 IWL_MVM_QUEUE_SHARED && 1268 iwl_mvm_txq_should_update(mvm, txq_id))) 1269 schedule_work(&mvm->add_stream_wk); 1270 } 1271 1272 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1273 mvmsta->deflink.sta_id, tid, txq_id, 1274 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1275 1276 /* From now on, we cannot access info->control */ 1277 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1278 1279 /* 1280 * The IV is introduced by the HW for new tx api, and it is not present 1281 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the 1282 * IV for those devices. 1283 */ 1284 if (ieee80211_is_data(fc)) 1285 iwl_mvm_mei_tx_copy_to_csme(mvm, skb, 1286 info->control.hw_key && 1287 !iwl_mvm_has_new_tx_api(mvm) ? 1288 info->control.hw_key->iv_len : 0); 1289 1290 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1291 goto drop_unlock_sta; 1292 1293 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1294 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1295 1296 spin_unlock(&mvmsta->lock); 1297 1298 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1299 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1300 goto drop; 1301 1302 return 0; 1303 1304 drop_unlock_sta: 1305 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1306 spin_unlock(&mvmsta->lock); 1307 drop: 1308 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id, 1309 tid); 1310 return -1; 1311 } 1312 1313 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1314 struct ieee80211_sta *sta) 1315 { 1316 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1317 struct ieee80211_tx_info info; 1318 struct sk_buff_head mpdus_skbs; 1319 unsigned int payload_len; 1320 int ret; 1321 struct sk_buff *orig_skb = skb; 1322 1323 if (WARN_ON_ONCE(!mvmsta)) 1324 return -1; 1325 1326 if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) 1327 return -1; 1328 1329 memcpy(&info, skb->cb, sizeof(info)); 1330 1331 if (!skb_is_gso(skb)) 1332 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1333 1334 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1335 tcp_hdrlen(skb) + skb->data_len; 1336 1337 if (payload_len <= skb_shinfo(skb)->gso_size) 1338 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1339 1340 __skb_queue_head_init(&mpdus_skbs); 1341 1342 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1343 if (ret) 1344 return ret; 1345 1346 WARN_ON(skb_queue_empty(&mpdus_skbs)); 1347 1348 while (!skb_queue_empty(&mpdus_skbs)) { 1349 skb = __skb_dequeue(&mpdus_skbs); 1350 1351 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1352 if (ret) { 1353 /* Free skbs created as part of TSO logic that have not yet been dequeued */ 1354 __skb_queue_purge(&mpdus_skbs); 1355 /* skb here is not necessarily same as skb that entered this method, 1356 * so free it explicitly. 1357 */ 1358 if (skb == orig_skb) 1359 ieee80211_free_txskb(mvm->hw, skb); 1360 else 1361 kfree_skb(skb); 1362 /* there was error, but we consumed skb one way or another, so return 0 */ 1363 return 0; 1364 } 1365 } 1366 1367 return 0; 1368 } 1369 1370 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1371 struct ieee80211_sta *sta, u8 tid) 1372 { 1373 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1374 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1375 struct ieee80211_vif *vif = mvmsta->vif; 1376 u16 normalized_ssn; 1377 1378 lockdep_assert_held(&mvmsta->lock); 1379 1380 if ((tid_data->state == IWL_AGG_ON || 1381 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1382 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1383 /* 1384 * Now that this aggregation or DQA queue is empty tell 1385 * mac80211 so it knows we no longer have frames buffered for 1386 * the station on this TID (for the TIM bitmap calculation.) 1387 */ 1388 ieee80211_sta_set_buffered(sta, tid, false); 1389 } 1390 1391 /* 1392 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1393 * to align the wrap around of ssn so we compare relevant values. 1394 */ 1395 normalized_ssn = tid_data->ssn; 1396 if (mvm->trans->trans_cfg->gen2) 1397 normalized_ssn &= 0xff; 1398 1399 if (normalized_ssn != tid_data->next_reclaimed) 1400 return; 1401 1402 switch (tid_data->state) { 1403 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1404 IWL_DEBUG_TX_QUEUES(mvm, 1405 "Can continue addBA flow ssn = next_recl = %d\n", 1406 tid_data->next_reclaimed); 1407 tid_data->state = IWL_AGG_STARTING; 1408 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1409 break; 1410 1411 case IWL_EMPTYING_HW_QUEUE_DELBA: 1412 IWL_DEBUG_TX_QUEUES(mvm, 1413 "Can continue DELBA flow ssn = next_recl = %d\n", 1414 tid_data->next_reclaimed); 1415 tid_data->state = IWL_AGG_OFF; 1416 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1417 break; 1418 1419 default: 1420 break; 1421 } 1422 } 1423 1424 #ifdef CONFIG_IWLWIFI_DEBUG 1425 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1426 { 1427 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1428 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1429 1430 switch (status & TX_STATUS_MSK) { 1431 case TX_STATUS_SUCCESS: 1432 return "SUCCESS"; 1433 TX_STATUS_POSTPONE(DELAY); 1434 TX_STATUS_POSTPONE(FEW_BYTES); 1435 TX_STATUS_POSTPONE(BT_PRIO); 1436 TX_STATUS_POSTPONE(QUIET_PERIOD); 1437 TX_STATUS_POSTPONE(CALC_TTAK); 1438 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1439 TX_STATUS_FAIL(SHORT_LIMIT); 1440 TX_STATUS_FAIL(LONG_LIMIT); 1441 TX_STATUS_FAIL(UNDERRUN); 1442 TX_STATUS_FAIL(DRAIN_FLOW); 1443 TX_STATUS_FAIL(RFKILL_FLUSH); 1444 TX_STATUS_FAIL(LIFE_EXPIRE); 1445 TX_STATUS_FAIL(DEST_PS); 1446 TX_STATUS_FAIL(HOST_ABORTED); 1447 TX_STATUS_FAIL(BT_RETRY); 1448 TX_STATUS_FAIL(STA_INVALID); 1449 TX_STATUS_FAIL(FRAG_DROPPED); 1450 TX_STATUS_FAIL(TID_DISABLE); 1451 TX_STATUS_FAIL(FIFO_FLUSHED); 1452 TX_STATUS_FAIL(SMALL_CF_POLL); 1453 TX_STATUS_FAIL(FW_DROP); 1454 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1455 } 1456 1457 return "UNKNOWN"; 1458 1459 #undef TX_STATUS_FAIL 1460 #undef TX_STATUS_POSTPONE 1461 } 1462 #endif /* CONFIG_IWLWIFI_DEBUG */ 1463 1464 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width) 1465 { 1466 switch (chan_width) { 1467 case RATE_MCS_CHAN_WIDTH_20: 1468 return 0; 1469 case RATE_MCS_CHAN_WIDTH_40: 1470 return IEEE80211_TX_RC_40_MHZ_WIDTH; 1471 case RATE_MCS_CHAN_WIDTH_80: 1472 return IEEE80211_TX_RC_80_MHZ_WIDTH; 1473 case RATE_MCS_CHAN_WIDTH_160: 1474 return IEEE80211_TX_RC_160_MHZ_WIDTH; 1475 default: 1476 return 0; 1477 } 1478 } 1479 1480 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1481 enum nl80211_band band, 1482 struct ieee80211_tx_rate *r) 1483 { 1484 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK; 1485 u32 rate = format == RATE_MCS_HT_MSK ? 1486 RATE_HT_MCS_INDEX(rate_n_flags) : 1487 rate_n_flags & RATE_MCS_CODE_MSK; 1488 1489 r->flags |= 1490 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1491 RATE_MCS_CHAN_WIDTH_MSK); 1492 1493 if (rate_n_flags & RATE_MCS_SGI_MSK) 1494 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1495 if (format == RATE_MCS_HT_MSK) { 1496 r->flags |= IEEE80211_TX_RC_MCS; 1497 r->idx = rate; 1498 } else if (format == RATE_MCS_VHT_MSK) { 1499 ieee80211_rate_set_vht(r, rate, 1500 FIELD_GET(RATE_MCS_NSS_MSK, 1501 rate_n_flags) + 1); 1502 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1503 } else if (format == RATE_MCS_HE_MSK) { 1504 /* mac80211 cannot do this without ieee80211_tx_status_ext() 1505 * but it only matters for radiotap */ 1506 r->idx = 0; 1507 } else { 1508 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags, 1509 band); 1510 } 1511 } 1512 1513 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags, 1514 enum nl80211_band band, 1515 struct ieee80211_tx_rate *r) 1516 { 1517 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1518 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1519 1520 r->flags |= 1521 iwl_mvm_get_hwrate_chan_width(rate_n_flags & 1522 RATE_MCS_CHAN_WIDTH_MSK_V1); 1523 1524 if (rate_n_flags & RATE_MCS_SGI_MSK_V1) 1525 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1526 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 1527 r->flags |= IEEE80211_TX_RC_MCS; 1528 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 1529 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 1530 ieee80211_rate_set_vht( 1531 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1532 FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1); 1533 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1534 } else { 1535 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1536 band); 1537 } 1538 } 1539 1540 /* 1541 * translate ucode response to mac80211 tx status control values 1542 */ 1543 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw, 1544 u32 rate_n_flags, 1545 struct ieee80211_tx_info *info) 1546 { 1547 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1548 1549 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP, 1550 TX_CMD, 0) <= 6) 1551 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags); 1552 1553 info->status.antenna = 1554 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS); 1555 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, 1556 info->band, r); 1557 } 1558 1559 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1560 u32 status, __le16 frame_control) 1561 { 1562 struct iwl_fw_dbg_trigger_tlv *trig; 1563 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1564 int i; 1565 1566 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) { 1567 enum iwl_fw_ini_time_point tp = 1568 IWL_FW_INI_TIME_POINT_TX_FAILED; 1569 1570 if (ieee80211_is_action(frame_control)) 1571 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED; 1572 1573 iwl_dbg_tlv_time_point(&mvm->fwrt, 1574 tp, NULL); 1575 return; 1576 } 1577 1578 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1579 FW_DBG_TRIGGER_TX_STATUS); 1580 if (!trig) 1581 return; 1582 1583 status_trig = (void *)trig->data; 1584 1585 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1586 /* don't collect on status 0 */ 1587 if (!status_trig->statuses[i].status) 1588 break; 1589 1590 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1591 continue; 1592 1593 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1594 "Tx status %d was received", 1595 status & TX_STATUS_MSK); 1596 break; 1597 } 1598 } 1599 1600 /* 1601 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1602 * @tx_resp: the Tx response from the fw (agg or non-agg) 1603 * 1604 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1605 * it can't know that everything will go well until the end of the AMPDU, it 1606 * can't know in advance the number of MPDUs that will be sent in the current 1607 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1608 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1609 * of the batch. This is why the SSN of the SCD is written at the end of the 1610 * whole struct at a variable offset. This function knows how to cope with the 1611 * variable offset and returns the SSN of the SCD. 1612 */ 1613 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1614 struct iwl_mvm_tx_resp *tx_resp) 1615 { 1616 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1617 tx_resp->frame_count) & 0xfff; 1618 } 1619 1620 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1621 struct iwl_rx_packet *pkt) 1622 { 1623 struct ieee80211_sta *sta; 1624 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1625 int txq_id = SEQ_TO_QUEUE(sequence); 1626 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1627 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1628 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1629 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1630 struct agg_tx_status *agg_status = 1631 iwl_mvm_get_agg_status(mvm, tx_resp); 1632 u32 status = le16_to_cpu(agg_status->status); 1633 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1634 struct sk_buff_head skbs; 1635 u8 skb_freed = 0; 1636 u8 lq_color; 1637 u16 next_reclaimed, seq_ctl; 1638 bool is_ndp = false; 1639 1640 __skb_queue_head_init(&skbs); 1641 1642 if (iwl_mvm_has_new_tx_api(mvm)) 1643 txq_id = le16_to_cpu(tx_resp->tx_queue); 1644 1645 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1646 1647 /* we can free until ssn % q.n_bd not inclusive */ 1648 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1649 1650 while (!skb_queue_empty(&skbs)) { 1651 struct sk_buff *skb = __skb_dequeue(&skbs); 1652 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1653 struct ieee80211_hdr *hdr = (void *)skb->data; 1654 bool flushed = false; 1655 1656 skb_freed++; 1657 1658 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1659 1660 memset(&info->status, 0, sizeof(info->status)); 1661 1662 /* inform mac80211 about what happened with the frame */ 1663 switch (status & TX_STATUS_MSK) { 1664 case TX_STATUS_SUCCESS: 1665 case TX_STATUS_DIRECT_DONE: 1666 info->flags |= IEEE80211_TX_STAT_ACK; 1667 break; 1668 case TX_STATUS_FAIL_FIFO_FLUSHED: 1669 case TX_STATUS_FAIL_DRAIN_FLOW: 1670 flushed = true; 1671 break; 1672 case TX_STATUS_FAIL_DEST_PS: 1673 /* the FW should have stopped the queue and not 1674 * return this status 1675 */ 1676 IWL_ERR_LIMIT(mvm, 1677 "FW reported TX filtered, status=0x%x, FC=0x%x\n", 1678 status, le16_to_cpu(hdr->frame_control)); 1679 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1680 break; 1681 default: 1682 break; 1683 } 1684 1685 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1686 ieee80211_is_mgmt(hdr->frame_control)) 1687 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1688 1689 /* 1690 * If we are freeing multiple frames, mark all the frames 1691 * but the first one as acked, since they were acknowledged 1692 * before 1693 * */ 1694 if (skb_freed > 1) 1695 info->flags |= IEEE80211_TX_STAT_ACK; 1696 1697 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control); 1698 1699 info->status.rates[0].count = tx_resp->failure_frame + 1; 1700 1701 iwl_mvm_hwrate_to_tx_status(mvm->fw, 1702 le32_to_cpu(tx_resp->initial_rate), 1703 info); 1704 1705 /* Don't assign the converted initial_rate, because driver 1706 * TLC uses this and doesn't support the new FW rate 1707 */ 1708 info->status.status_driver_data[1] = 1709 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1710 1711 /* Single frame failure in an AMPDU queue => send BAR */ 1712 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1713 !(info->flags & IEEE80211_TX_STAT_ACK) && 1714 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1715 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1716 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1717 1718 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1719 if (ieee80211_is_back_req(hdr->frame_control)) 1720 seq_ctl = 0; 1721 else if (status != TX_STATUS_SUCCESS) 1722 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1723 1724 if (unlikely(!seq_ctl)) { 1725 /* 1726 * If it is an NDP, we can't update next_reclaim since 1727 * its sequence control is 0. Note that for that same 1728 * reason, NDPs are never sent to A-MPDU'able queues 1729 * so that we can never have more than one freed frame 1730 * for a single Tx resonse (see WARN_ON below). 1731 */ 1732 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1733 is_ndp = true; 1734 } 1735 1736 /* 1737 * TODO: this is not accurate if we are freeing more than one 1738 * packet. 1739 */ 1740 info->status.tx_time = 1741 le16_to_cpu(tx_resp->wireless_media_time); 1742 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1743 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1744 info->status.status_driver_data[0] = 1745 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1746 1747 if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1))) 1748 ieee80211_tx_status(mvm->hw, skb); 1749 } 1750 1751 /* This is an aggregation queue or might become one, so we use 1752 * the ssn since: ssn = wifi seq_num % 256. 1753 * The seq_ctl is the sequence control of the packet to which 1754 * this Tx response relates. But if there is a hole in the 1755 * bitmap of the BA we received, this Tx response may allow to 1756 * reclaim the hole and all the subsequent packets that were 1757 * already acked. In that case, seq_ctl != ssn, and the next 1758 * packet to be reclaimed will be ssn and not seq_ctl. In that 1759 * case, several packets will be reclaimed even if 1760 * frame_count = 1. 1761 * 1762 * The ssn is the index (% 256) of the latest packet that has 1763 * treated (acked / dropped) + 1. 1764 */ 1765 next_reclaimed = ssn; 1766 1767 IWL_DEBUG_TX_REPLY(mvm, 1768 "TXQ %d status %s (0x%08x)\n", 1769 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1770 1771 IWL_DEBUG_TX_REPLY(mvm, 1772 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1773 le32_to_cpu(tx_resp->initial_rate), 1774 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1775 ssn, next_reclaimed, seq_ctl); 1776 1777 rcu_read_lock(); 1778 1779 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1780 /* 1781 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1782 * the firmware while we still have packets for it in the Tx queues. 1783 */ 1784 if (WARN_ON_ONCE(!sta)) 1785 goto out; 1786 1787 if (!IS_ERR(sta)) { 1788 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1789 1790 iwl_mvm_tx_airtime(mvm, mvmsta, 1791 le16_to_cpu(tx_resp->wireless_media_time)); 1792 1793 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1794 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1795 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1796 1797 if (sta->wme && tid != IWL_MGMT_TID) { 1798 struct iwl_mvm_tid_data *tid_data = 1799 &mvmsta->tid_data[tid]; 1800 bool send_eosp_ndp = false; 1801 1802 spin_lock_bh(&mvmsta->lock); 1803 1804 if (!is_ndp) { 1805 tid_data->next_reclaimed = next_reclaimed; 1806 IWL_DEBUG_TX_REPLY(mvm, 1807 "Next reclaimed packet:%d\n", 1808 next_reclaimed); 1809 } else { 1810 IWL_DEBUG_TX_REPLY(mvm, 1811 "NDP - don't update next_reclaimed\n"); 1812 } 1813 1814 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1815 1816 if (mvmsta->sleep_tx_count) { 1817 mvmsta->sleep_tx_count--; 1818 if (mvmsta->sleep_tx_count && 1819 !iwl_mvm_tid_queued(mvm, tid_data)) { 1820 /* 1821 * The number of frames in the queue 1822 * dropped to 0 even if we sent less 1823 * frames than we thought we had on the 1824 * Tx queue. 1825 * This means we had holes in the BA 1826 * window that we just filled, ask 1827 * mac80211 to send EOSP since the 1828 * firmware won't know how to do that. 1829 * Send NDP and the firmware will send 1830 * EOSP notification that will trigger 1831 * a call to ieee80211_sta_eosp(). 1832 */ 1833 send_eosp_ndp = true; 1834 } 1835 } 1836 1837 spin_unlock_bh(&mvmsta->lock); 1838 if (send_eosp_ndp) { 1839 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1840 IEEE80211_FRAME_RELEASE_UAPSD, 1841 1, tid, false, false); 1842 mvmsta->sleep_tx_count = 0; 1843 ieee80211_send_eosp_nullfunc(sta, tid); 1844 } 1845 } 1846 1847 if (mvmsta->next_status_eosp) { 1848 mvmsta->next_status_eosp = false; 1849 ieee80211_sta_eosp(sta); 1850 } 1851 } 1852 out: 1853 rcu_read_unlock(); 1854 } 1855 1856 #ifdef CONFIG_IWLWIFI_DEBUG 1857 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1858 static const char *iwl_get_agg_tx_status(u16 status) 1859 { 1860 switch (status & AGG_TX_STATE_STATUS_MSK) { 1861 AGG_TX_STATE_(TRANSMITTED); 1862 AGG_TX_STATE_(UNDERRUN); 1863 AGG_TX_STATE_(BT_PRIO); 1864 AGG_TX_STATE_(FEW_BYTES); 1865 AGG_TX_STATE_(ABORT); 1866 AGG_TX_STATE_(TX_ON_AIR_DROP); 1867 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1868 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1869 AGG_TX_STATE_(SCD_QUERY); 1870 AGG_TX_STATE_(TEST_BAD_CRC32); 1871 AGG_TX_STATE_(RESPONSE); 1872 AGG_TX_STATE_(DUMP_TX); 1873 AGG_TX_STATE_(DELAY_TX); 1874 } 1875 1876 return "UNKNOWN"; 1877 } 1878 1879 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1880 struct iwl_rx_packet *pkt) 1881 { 1882 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1883 struct agg_tx_status *frame_status = 1884 iwl_mvm_get_agg_status(mvm, tx_resp); 1885 int i; 1886 bool tirgger_timepoint = false; 1887 1888 for (i = 0; i < tx_resp->frame_count; i++) { 1889 u16 fstatus = le16_to_cpu(frame_status[i].status); 1890 /* In case one frame wasn't transmitted trigger time point */ 1891 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) != 1892 AGG_TX_STATE_TRANSMITTED); 1893 IWL_DEBUG_TX_REPLY(mvm, 1894 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1895 iwl_get_agg_tx_status(fstatus), 1896 fstatus & AGG_TX_STATE_STATUS_MSK, 1897 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1898 AGG_TX_STATE_TRY_CNT_POS, 1899 le16_to_cpu(frame_status[i].sequence)); 1900 } 1901 1902 if (tirgger_timepoint) 1903 iwl_dbg_tlv_time_point(&mvm->fwrt, 1904 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL); 1905 1906 } 1907 #else 1908 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1909 struct iwl_rx_packet *pkt) 1910 {} 1911 #endif /* CONFIG_IWLWIFI_DEBUG */ 1912 1913 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1914 struct iwl_rx_packet *pkt) 1915 { 1916 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1917 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1918 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1919 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1920 struct iwl_mvm_sta *mvmsta; 1921 int queue = SEQ_TO_QUEUE(sequence); 1922 struct ieee80211_sta *sta; 1923 1924 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1925 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1926 return; 1927 1928 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1929 1930 rcu_read_lock(); 1931 1932 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1933 1934 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1935 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) { 1936 rcu_read_unlock(); 1937 return; 1938 } 1939 1940 if (!WARN_ON_ONCE(!mvmsta)) { 1941 mvmsta->tid_data[tid].rate_n_flags = 1942 le32_to_cpu(tx_resp->initial_rate); 1943 mvmsta->tid_data[tid].tx_time = 1944 le16_to_cpu(tx_resp->wireless_media_time); 1945 mvmsta->tid_data[tid].lq_color = 1946 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1947 iwl_mvm_tx_airtime(mvm, mvmsta, 1948 le16_to_cpu(tx_resp->wireless_media_time)); 1949 } 1950 1951 rcu_read_unlock(); 1952 } 1953 1954 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1955 { 1956 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1957 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1958 1959 if (tx_resp->frame_count == 1) 1960 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1961 else 1962 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1963 } 1964 1965 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1966 int txq, int index, 1967 struct ieee80211_tx_info *tx_info, u32 rate, 1968 bool is_flush) 1969 { 1970 struct sk_buff_head reclaimed_skbs; 1971 struct iwl_mvm_tid_data *tid_data = NULL; 1972 struct ieee80211_sta *sta; 1973 struct iwl_mvm_sta *mvmsta = NULL; 1974 struct sk_buff *skb; 1975 int freed; 1976 1977 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1978 tid > IWL_MAX_TID_COUNT, 1979 "sta_id %d tid %d", sta_id, tid)) 1980 return; 1981 1982 rcu_read_lock(); 1983 1984 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1985 1986 /* Reclaiming frames for a station that has been deleted ? */ 1987 if (WARN_ON_ONCE(!sta)) { 1988 rcu_read_unlock(); 1989 return; 1990 } 1991 1992 __skb_queue_head_init(&reclaimed_skbs); 1993 1994 /* 1995 * Release all TFDs before the SSN, i.e. all TFDs in front of 1996 * block-ack window (we assume that they've been successfully 1997 * transmitted ... if not, it's too late anyway). 1998 */ 1999 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 2000 2001 skb_queue_walk(&reclaimed_skbs, skb) { 2002 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2003 2004 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 2005 2006 memset(&info->status, 0, sizeof(info->status)); 2007 /* Packet was transmitted successfully, failures come as single 2008 * frames because before failing a frame the firmware transmits 2009 * it without aggregation at least once. 2010 */ 2011 if (!is_flush) 2012 info->flags |= IEEE80211_TX_STAT_ACK; 2013 } 2014 2015 /* 2016 * It's possible to get a BA response after invalidating the rcu (rcu is 2017 * invalidated in order to prevent new Tx from being sent, but there may 2018 * be some frames already in-flight). 2019 * In this case we just want to reclaim, and could skip all the 2020 * sta-dependent stuff since it's in the middle of being removed 2021 * anyways. 2022 */ 2023 if (IS_ERR(sta)) 2024 goto out; 2025 2026 mvmsta = iwl_mvm_sta_from_mac80211(sta); 2027 tid_data = &mvmsta->tid_data[tid]; 2028 2029 if (tid_data->txq_id != txq) { 2030 IWL_ERR(mvm, 2031 "invalid reclaim request: Q %d, tid %d\n", 2032 tid_data->txq_id, tid); 2033 rcu_read_unlock(); 2034 return; 2035 } 2036 2037 spin_lock_bh(&mvmsta->lock); 2038 2039 tid_data->next_reclaimed = index; 2040 2041 iwl_mvm_check_ratid_empty(mvm, sta, tid); 2042 2043 freed = 0; 2044 2045 /* pack lq color from tid_data along the reduced txp */ 2046 tx_info->status.status_driver_data[0] = 2047 RS_DRV_DATA_PACK(tid_data->lq_color, 2048 tx_info->status.status_driver_data[0]); 2049 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 2050 2051 skb_queue_walk(&reclaimed_skbs, skb) { 2052 struct ieee80211_hdr *hdr = (void *)skb->data; 2053 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2054 2055 if (!is_flush) { 2056 if (ieee80211_is_data_qos(hdr->frame_control)) 2057 freed++; 2058 else 2059 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 2060 } 2061 2062 /* this is the first skb we deliver in this batch */ 2063 /* put the rate scaling data there */ 2064 if (freed == 1) { 2065 info->flags |= IEEE80211_TX_STAT_AMPDU; 2066 memcpy(&info->status, &tx_info->status, 2067 sizeof(tx_info->status)); 2068 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info); 2069 } 2070 } 2071 2072 spin_unlock_bh(&mvmsta->lock); 2073 2074 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 2075 * possible (i.e. first MPDU in the aggregation wasn't acked) 2076 * Still it's important to update RS about sent vs. acked. 2077 */ 2078 if (!is_flush && skb_queue_empty(&reclaimed_skbs) && 2079 !iwl_mvm_has_tlc_offload(mvm)) { 2080 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 2081 2082 /* no TLC offload, so non-MLD mode */ 2083 if (mvmsta->vif) 2084 chanctx_conf = 2085 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf); 2086 2087 if (WARN_ON_ONCE(!chanctx_conf)) 2088 goto out; 2089 2090 tx_info->band = chanctx_conf->def.chan->band; 2091 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info); 2092 2093 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 2094 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false); 2095 } 2096 2097 out: 2098 rcu_read_unlock(); 2099 2100 while (!skb_queue_empty(&reclaimed_skbs)) { 2101 skb = __skb_dequeue(&reclaimed_skbs); 2102 ieee80211_tx_status(mvm->hw, skb); 2103 } 2104 } 2105 2106 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2107 { 2108 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2109 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 2110 int sta_id, tid, txq, index; 2111 struct ieee80211_tx_info ba_info = {}; 2112 struct iwl_mvm_ba_notif *ba_notif; 2113 struct iwl_mvm_tid_data *tid_data; 2114 struct iwl_mvm_sta *mvmsta; 2115 2116 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 2117 2118 if (iwl_mvm_has_new_tx_api(mvm)) { 2119 struct iwl_mvm_compressed_ba_notif *ba_res = 2120 (void *)pkt->data; 2121 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 2122 u16 tfd_cnt; 2123 int i; 2124 2125 if (unlikely(sizeof(*ba_res) > pkt_len)) 2126 return; 2127 2128 sta_id = ba_res->sta_id; 2129 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 2130 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 2131 ba_info.status.tx_time = 2132 (u16)le32_to_cpu(ba_res->wireless_time); 2133 ba_info.status.status_driver_data[0] = 2134 (void *)(uintptr_t)ba_res->reduced_txp; 2135 2136 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); 2137 if (!tfd_cnt || struct_size(ba_res, tfd, tfd_cnt) > pkt_len) 2138 return; 2139 2140 rcu_read_lock(); 2141 2142 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2143 /* 2144 * It's possible to get a BA response after invalidating the rcu 2145 * (rcu is invalidated in order to prevent new Tx from being 2146 * sent, but there may be some frames already in-flight). 2147 * In this case we just want to reclaim, and could skip all the 2148 * sta-dependent stuff since it's in the middle of being removed 2149 * anyways. 2150 */ 2151 2152 /* Free per TID */ 2153 for (i = 0; i < tfd_cnt; i++) { 2154 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 2155 &ba_res->tfd[i]; 2156 2157 tid = ba_tfd->tid; 2158 if (tid == IWL_MGMT_TID) 2159 tid = IWL_MAX_TID_COUNT; 2160 2161 if (mvmsta) 2162 mvmsta->tid_data[i].lq_color = lq_color; 2163 2164 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 2165 (int)(le16_to_cpu(ba_tfd->q_num)), 2166 le16_to_cpu(ba_tfd->tfd_index), 2167 &ba_info, 2168 le32_to_cpu(ba_res->tx_rate), false); 2169 } 2170 2171 if (mvmsta) 2172 iwl_mvm_tx_airtime(mvm, mvmsta, 2173 le32_to_cpu(ba_res->wireless_time)); 2174 rcu_read_unlock(); 2175 2176 IWL_DEBUG_TX_REPLY(mvm, 2177 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 2178 sta_id, le32_to_cpu(ba_res->flags), 2179 le16_to_cpu(ba_res->txed), 2180 le16_to_cpu(ba_res->done)); 2181 return; 2182 } 2183 2184 ba_notif = (void *)pkt->data; 2185 sta_id = ba_notif->sta_id; 2186 tid = ba_notif->tid; 2187 /* "flow" corresponds to Tx queue */ 2188 txq = le16_to_cpu(ba_notif->scd_flow); 2189 /* "ssn" is start of block-ack Tx window, corresponds to index 2190 * (in Tx queue's circular buffer) of first TFD/frame in window */ 2191 index = le16_to_cpu(ba_notif->scd_ssn); 2192 2193 rcu_read_lock(); 2194 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2195 if (WARN_ON_ONCE(!mvmsta)) { 2196 rcu_read_unlock(); 2197 return; 2198 } 2199 2200 tid_data = &mvmsta->tid_data[tid]; 2201 2202 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2203 ba_info.status.ampdu_len = ba_notif->txed; 2204 ba_info.status.tx_time = tid_data->tx_time; 2205 ba_info.status.status_driver_data[0] = 2206 (void *)(uintptr_t)ba_notif->reduced_txp; 2207 2208 rcu_read_unlock(); 2209 2210 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2211 tid_data->rate_n_flags, false); 2212 2213 IWL_DEBUG_TX_REPLY(mvm, 2214 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2215 ba_notif->sta_addr, ba_notif->sta_id); 2216 2217 IWL_DEBUG_TX_REPLY(mvm, 2218 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2219 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2220 le64_to_cpu(ba_notif->bitmap), txq, index, 2221 ba_notif->txed, ba_notif->txed_2_done); 2222 2223 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2224 ba_notif->reduced_txp); 2225 } 2226 2227 /* 2228 * Note that there are transports that buffer frames before they reach 2229 * the firmware. This means that after flush_tx_path is called, the 2230 * queue might not be empty. The race-free way to handle this is to: 2231 * 1) set the station as draining 2232 * 2) flush the Tx path 2233 * 3) wait for the transport queues to be empty 2234 */ 2235 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk) 2236 { 2237 int ret; 2238 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2239 .queues_ctl = cpu_to_le32(tfd_msk), 2240 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2241 }; 2242 2243 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2244 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0, 2245 sizeof(flush_cmd), &flush_cmd); 2246 if (ret) 2247 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2248 return ret; 2249 } 2250 2251 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids) 2252 { 2253 int ret; 2254 struct iwl_tx_path_flush_cmd_rsp *rsp; 2255 struct iwl_tx_path_flush_cmd flush_cmd = { 2256 .sta_id = cpu_to_le32(sta_id), 2257 .tid_mask = cpu_to_le16(tids), 2258 }; 2259 2260 struct iwl_host_cmd cmd = { 2261 .id = TXPATH_FLUSH, 2262 .len = { sizeof(flush_cmd), }, 2263 .data = { &flush_cmd, }, 2264 }; 2265 2266 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2267 2268 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0) 2269 cmd.flags |= CMD_WANT_SKB; 2270 2271 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n", 2272 sta_id, tids); 2273 2274 ret = iwl_mvm_send_cmd(mvm, &cmd); 2275 2276 if (ret) { 2277 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2278 return ret; 2279 } 2280 2281 if (cmd.flags & CMD_WANT_SKB) { 2282 int i; 2283 int num_flushed_queues; 2284 2285 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) { 2286 ret = -EIO; 2287 goto free_rsp; 2288 } 2289 2290 rsp = (void *)cmd.resp_pkt->data; 2291 2292 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id, 2293 "sta_id %d != rsp_sta_id %d", 2294 sta_id, le16_to_cpu(rsp->sta_id))) { 2295 ret = -EIO; 2296 goto free_rsp; 2297 } 2298 2299 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues); 2300 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP, 2301 "num_flushed_queues %d", num_flushed_queues)) { 2302 ret = -EIO; 2303 goto free_rsp; 2304 } 2305 2306 for (i = 0; i < num_flushed_queues; i++) { 2307 struct ieee80211_tx_info tx_info = {}; 2308 struct iwl_flush_queue_info *queue_info = &rsp->queues[i]; 2309 int tid = le16_to_cpu(queue_info->tid); 2310 int read_before = le16_to_cpu(queue_info->read_before_flush); 2311 int read_after = le16_to_cpu(queue_info->read_after_flush); 2312 int queue_num = le16_to_cpu(queue_info->queue_num); 2313 2314 if (tid == IWL_MGMT_TID) 2315 tid = IWL_MAX_TID_COUNT; 2316 2317 IWL_DEBUG_TX_QUEUES(mvm, 2318 "tid %d queue_id %d read-before %d read-after %d\n", 2319 tid, queue_num, read_before, read_after); 2320 2321 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after, 2322 &tx_info, 0, true); 2323 } 2324 free_rsp: 2325 iwl_free_resp(&cmd); 2326 } 2327 return ret; 2328 } 2329 2330 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal) 2331 { 2332 u32 sta_id, tfd_queue_msk; 2333 2334 if (internal) { 2335 struct iwl_mvm_int_sta *int_sta = sta; 2336 2337 sta_id = int_sta->sta_id; 2338 tfd_queue_msk = int_sta->tfd_queue_msk; 2339 } else { 2340 struct iwl_mvm_sta *mvm_sta = sta; 2341 2342 sta_id = mvm_sta->deflink.sta_id; 2343 tfd_queue_msk = mvm_sta->tfd_queue_msk; 2344 } 2345 2346 if (iwl_mvm_has_new_tx_api(mvm)) 2347 return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff); 2348 2349 return iwl_mvm_flush_tx_path(mvm, tfd_queue_msk); 2350 } 2351