1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * Copyright(c) 2018 - 2020 Intel Corporation 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of version 2 of the GNU General Public License as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, but 18 * WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * General Public License for more details. 21 * 22 * The full GNU General Public License is included in this distribution 23 * in the file called COPYING. 24 * 25 * Contact Information: 26 * Intel Linux Wireless <linuxwifi@intel.com> 27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28 * 29 * BSD LICENSE 30 * 31 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 33 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 34 * Copyright(c) 2018 - 2020 Intel Corporation 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 41 * * Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * * Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in 45 * the documentation and/or other materials provided with the 46 * distribution. 47 * * Neither the name Intel Corporation nor the names of its 48 * contributors may be used to endorse or promote products derived 49 * from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 * 63 *****************************************************************************/ 64 #include <linux/ieee80211.h> 65 #include <linux/etherdevice.h> 66 #include <linux/tcp.h> 67 #include <net/ip.h> 68 #include <net/ipv6.h> 69 70 #include "iwl-trans.h" 71 #include "iwl-eeprom-parse.h" 72 #include "mvm.h" 73 #include "sta.h" 74 75 static void 76 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 77 u16 tid, u16 ssn) 78 { 79 struct iwl_fw_dbg_trigger_tlv *trig; 80 struct iwl_fw_dbg_trigger_ba *ba_trig; 81 82 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA); 83 if (!trig) 84 return; 85 86 ba_trig = (void *)trig->data; 87 88 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 89 return; 90 91 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 92 "BAR sent to %pM, tid %d, ssn %d", 93 addr, tid, ssn); 94 } 95 96 #define OPT_HDR(type, skb, off) \ 97 (type *)(skb_network_header(skb) + (off)) 98 99 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 100 struct ieee80211_hdr *hdr, 101 struct ieee80211_tx_info *info, 102 u16 offload_assist) 103 { 104 #if IS_ENABLED(CONFIG_INET) 105 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 106 u8 protocol = 0; 107 108 /* 109 * Do not compute checksum if already computed or if transport will 110 * compute it 111 */ 112 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD) 113 goto out; 114 115 /* We do not expect to be requested to csum stuff we do not support */ 116 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 117 (skb->protocol != htons(ETH_P_IP) && 118 skb->protocol != htons(ETH_P_IPV6)), 119 "No support for requested checksum\n")) { 120 skb_checksum_help(skb); 121 goto out; 122 } 123 124 if (skb->protocol == htons(ETH_P_IP)) { 125 protocol = ip_hdr(skb)->protocol; 126 } else { 127 #if IS_ENABLED(CONFIG_IPV6) 128 struct ipv6hdr *ipv6h = 129 (struct ipv6hdr *)skb_network_header(skb); 130 unsigned int off = sizeof(*ipv6h); 131 132 protocol = ipv6h->nexthdr; 133 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 134 struct ipv6_opt_hdr *hp; 135 136 /* only supported extension headers */ 137 if (protocol != NEXTHDR_ROUTING && 138 protocol != NEXTHDR_HOP && 139 protocol != NEXTHDR_DEST) { 140 skb_checksum_help(skb); 141 goto out; 142 } 143 144 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 145 protocol = hp->nexthdr; 146 off += ipv6_optlen(hp); 147 } 148 /* if we get here - protocol now should be TCP/UDP */ 149 #endif 150 } 151 152 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 153 WARN_ON_ONCE(1); 154 skb_checksum_help(skb); 155 goto out; 156 } 157 158 /* enable L4 csum */ 159 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 160 161 /* 162 * Set offset to IP header (snap). 163 * We don't support tunneling so no need to take care of inner header. 164 * Size is in words. 165 */ 166 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 167 168 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 169 if (skb->protocol == htons(ETH_P_IP) && 170 (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) { 171 ip_hdr(skb)->check = 0; 172 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 173 } 174 175 /* reset UDP/TCP header csum */ 176 if (protocol == IPPROTO_TCP) 177 tcp_hdr(skb)->check = 0; 178 else 179 udp_hdr(skb)->check = 0; 180 181 /* 182 * mac header len should include IV, size is in words unless 183 * the IV is added by the firmware like in WEP. 184 * In new Tx API, the IV is always added by the firmware. 185 */ 186 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 187 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 188 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 189 mh_len += info->control.hw_key->iv_len; 190 mh_len /= 2; 191 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 192 193 out: 194 #endif 195 return offload_assist; 196 } 197 198 /* 199 * Sets most of the Tx cmd's fields 200 */ 201 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 202 struct iwl_tx_cmd *tx_cmd, 203 struct ieee80211_tx_info *info, u8 sta_id) 204 { 205 struct ieee80211_hdr *hdr = (void *)skb->data; 206 __le16 fc = hdr->frame_control; 207 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 208 u32 len = skb->len + FCS_LEN; 209 u16 offload_assist = 0; 210 u8 ac; 211 212 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) || 213 (ieee80211_is_probe_resp(fc) && 214 !is_multicast_ether_addr(hdr->addr1))) 215 tx_flags |= TX_CMD_FLG_ACK; 216 else 217 tx_flags &= ~TX_CMD_FLG_ACK; 218 219 if (ieee80211_is_probe_resp(fc)) 220 tx_flags |= TX_CMD_FLG_TSF; 221 222 if (ieee80211_has_morefrags(fc)) 223 tx_flags |= TX_CMD_FLG_MORE_FRAG; 224 225 if (ieee80211_is_data_qos(fc)) { 226 u8 *qc = ieee80211_get_qos_ctl(hdr); 227 tx_cmd->tid_tspec = qc[0] & 0xf; 228 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 229 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 230 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 231 } else if (ieee80211_is_back_req(fc)) { 232 struct ieee80211_bar *bar = (void *)skb->data; 233 u16 control = le16_to_cpu(bar->control); 234 u16 ssn = le16_to_cpu(bar->start_seq_num); 235 236 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 237 tx_cmd->tid_tspec = (control & 238 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 239 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 240 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 241 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 242 ssn); 243 } else { 244 if (ieee80211_is_data(fc)) 245 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 246 else 247 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT; 248 249 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 250 tx_flags |= TX_CMD_FLG_SEQ_CTL; 251 else 252 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 253 } 254 255 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */ 256 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 257 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 258 else 259 ac = tid_to_mac80211_ac[0]; 260 261 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 262 TX_CMD_FLG_BT_PRIO_POS; 263 264 if (ieee80211_is_mgmt(fc)) { 265 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 266 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 267 else if (ieee80211_is_action(fc)) 268 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 269 else 270 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 271 272 /* The spec allows Action frames in A-MPDU, we don't support 273 * it 274 */ 275 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 276 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 277 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 278 } else { 279 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 280 } 281 282 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 283 !is_multicast_ether_addr(hdr->addr1)) 284 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 285 286 if (fw_has_capa(&mvm->fw->ucode_capa, 287 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 288 ieee80211_action_contains_tpc(skb)) 289 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 290 291 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 292 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 293 tx_cmd->len = cpu_to_le16((u16)skb->len); 294 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 295 tx_cmd->sta_id = sta_id; 296 297 /* padding is inserted later in transport */ 298 if (ieee80211_hdrlen(fc) % 4 && 299 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 300 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 301 302 tx_cmd->offload_assist |= 303 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info, 304 offload_assist)); 305 } 306 307 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, 308 struct ieee80211_tx_info *info, 309 struct ieee80211_sta *sta, __le16 fc) 310 { 311 if (info->band == NL80211_BAND_2GHZ && 312 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 313 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 314 315 if (sta && ieee80211_is_data(fc)) { 316 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 317 318 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS; 319 } 320 321 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 322 } 323 324 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 325 struct ieee80211_tx_info *info, 326 struct ieee80211_sta *sta) 327 { 328 int rate_idx; 329 u8 rate_plcp; 330 u32 rate_flags = 0; 331 332 /* HT rate doesn't make sense for a non data frame */ 333 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, 334 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n", 335 info->control.rates[0].flags, 336 info->control.rates[0].idx); 337 338 rate_idx = info->control.rates[0].idx; 339 /* if the rate isn't a well known legacy rate, take the lowest one */ 340 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 341 rate_idx = rate_lowest_index( 342 &mvm->nvm_data->bands[info->band], sta); 343 344 /* 345 * For non 2 GHZ band, remap mac80211 rate 346 * indices into driver indices 347 */ 348 if (info->band != NL80211_BAND_2GHZ) 349 rate_idx += IWL_FIRST_OFDM_RATE; 350 351 /* For 2.4 GHZ band, check that there is no need to remap */ 352 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 353 354 /* Get PLCP rate for tx_cmd->rate_n_flags */ 355 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 356 357 /* Set CCK flag as needed */ 358 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 359 rate_flags |= RATE_MCS_CCK_MSK; 360 361 return (u32)rate_plcp | rate_flags; 362 } 363 364 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 365 struct ieee80211_tx_info *info, 366 struct ieee80211_sta *sta, __le16 fc) 367 { 368 return iwl_mvm_get_tx_rate(mvm, info, sta) | 369 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 370 } 371 372 /* 373 * Sets the fields in the Tx cmd that are rate related 374 */ 375 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 376 struct ieee80211_tx_info *info, 377 struct ieee80211_sta *sta, __le16 fc) 378 { 379 /* Set retry limit on RTS packets */ 380 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 381 382 /* Set retry limit on DATA packets and Probe Responses*/ 383 if (ieee80211_is_probe_resp(fc)) { 384 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 385 tx_cmd->rts_retry_limit = 386 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 387 } else if (ieee80211_is_back_req(fc)) { 388 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 389 } else { 390 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 391 } 392 393 /* 394 * for data packets, rate info comes from the table inside the fw. This 395 * table is controlled by LINK_QUALITY commands 396 */ 397 398 if (ieee80211_is_data(fc) && sta) { 399 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 400 401 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 402 tx_cmd->initial_rate_index = 0; 403 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 404 return; 405 } 406 } else if (ieee80211_is_back_req(fc)) { 407 tx_cmd->tx_flags |= 408 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 409 } 410 411 /* Set the rate in the TX cmd */ 412 tx_cmd->rate_n_flags = 413 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 414 } 415 416 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 417 u8 *crypto_hdr) 418 { 419 struct ieee80211_key_conf *keyconf = info->control.hw_key; 420 u64 pn; 421 422 pn = atomic64_inc_return(&keyconf->tx_pn); 423 crypto_hdr[0] = pn; 424 crypto_hdr[2] = 0; 425 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 426 crypto_hdr[1] = pn >> 8; 427 crypto_hdr[4] = pn >> 16; 428 crypto_hdr[5] = pn >> 24; 429 crypto_hdr[6] = pn >> 32; 430 crypto_hdr[7] = pn >> 40; 431 } 432 433 /* 434 * Sets the fields in the Tx cmd that are crypto related 435 */ 436 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 437 struct ieee80211_tx_info *info, 438 struct iwl_tx_cmd *tx_cmd, 439 struct sk_buff *skb_frag, 440 int hdrlen) 441 { 442 struct ieee80211_key_conf *keyconf = info->control.hw_key; 443 u8 *crypto_hdr = skb_frag->data + hdrlen; 444 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 445 u64 pn; 446 447 switch (keyconf->cipher) { 448 case WLAN_CIPHER_SUITE_CCMP: 449 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 450 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 451 break; 452 453 case WLAN_CIPHER_SUITE_TKIP: 454 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 455 pn = atomic64_inc_return(&keyconf->tx_pn); 456 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 457 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 458 break; 459 460 case WLAN_CIPHER_SUITE_WEP104: 461 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 462 /* fall through */ 463 case WLAN_CIPHER_SUITE_WEP40: 464 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 465 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 466 TX_CMD_SEC_WEP_KEY_IDX_MSK); 467 468 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 469 break; 470 case WLAN_CIPHER_SUITE_GCMP: 471 case WLAN_CIPHER_SUITE_GCMP_256: 472 type = TX_CMD_SEC_GCMP; 473 /* Fall through */ 474 case WLAN_CIPHER_SUITE_CCMP_256: 475 /* TODO: Taking the key from the table might introduce a race 476 * when PTK rekeying is done, having an old packets with a PN 477 * based on the old key but the message encrypted with a new 478 * one. 479 * Need to handle this. 480 */ 481 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 482 tx_cmd->key[0] = keyconf->hw_key_idx; 483 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 484 break; 485 default: 486 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 487 } 488 } 489 490 /* 491 * Allocates and sets the Tx cmd the driver data pointers in the skb 492 */ 493 static struct iwl_device_tx_cmd * 494 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 495 struct ieee80211_tx_info *info, int hdrlen, 496 struct ieee80211_sta *sta, u8 sta_id) 497 { 498 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 499 struct iwl_device_tx_cmd *dev_cmd; 500 struct iwl_tx_cmd *tx_cmd; 501 502 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 503 504 if (unlikely(!dev_cmd)) 505 return NULL; 506 507 dev_cmd->hdr.cmd = TX_CMD; 508 509 if (iwl_mvm_has_new_tx_api(mvm)) { 510 u16 offload_assist = 0; 511 u32 rate_n_flags = 0; 512 u16 flags = 0; 513 struct iwl_mvm_sta *mvmsta = sta ? 514 iwl_mvm_sta_from_mac80211(sta) : NULL; 515 516 if (ieee80211_is_data_qos(hdr->frame_control)) { 517 u8 *qc = ieee80211_get_qos_ctl(hdr); 518 519 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 520 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 521 } 522 523 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, 524 offload_assist); 525 526 /* padding is inserted later in transport */ 527 if (ieee80211_hdrlen(hdr->frame_control) % 4 && 528 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 529 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 530 531 if (!info->control.hw_key) 532 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 533 534 /* 535 * For data packets rate info comes from the fw. Only 536 * set rate/antenna during connection establishment or in case 537 * no station is given. 538 */ 539 if (!sta || !ieee80211_is_data(hdr->frame_control) || 540 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 541 flags |= IWL_TX_FLAGS_CMD_RATE; 542 rate_n_flags = 543 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 544 hdr->frame_control); 545 } 546 547 if (mvm->trans->trans_cfg->device_family >= 548 IWL_DEVICE_FAMILY_AX210) { 549 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 550 551 cmd->offload_assist |= cpu_to_le32(offload_assist); 552 553 /* Total # bytes to be transmitted */ 554 cmd->len = cpu_to_le16((u16)skb->len); 555 556 /* Copy MAC header from skb into command buffer */ 557 memcpy(cmd->hdr, hdr, hdrlen); 558 559 cmd->flags = cpu_to_le16(flags); 560 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 561 } else { 562 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 563 564 cmd->offload_assist |= cpu_to_le16(offload_assist); 565 566 /* Total # bytes to be transmitted */ 567 cmd->len = cpu_to_le16((u16)skb->len); 568 569 /* Copy MAC header from skb into command buffer */ 570 memcpy(cmd->hdr, hdr, hdrlen); 571 572 cmd->flags = cpu_to_le32(flags); 573 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 574 } 575 goto out; 576 } 577 578 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 579 580 if (info->control.hw_key) 581 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 582 583 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 584 585 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 586 587 /* Copy MAC header from skb into command buffer */ 588 memcpy(tx_cmd->hdr, hdr, hdrlen); 589 590 out: 591 return dev_cmd; 592 } 593 594 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 595 struct iwl_device_tx_cmd *cmd) 596 { 597 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 598 599 memset(&skb_info->status, 0, sizeof(skb_info->status)); 600 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 601 602 skb_info->driver_data[1] = cmd; 603 } 604 605 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 606 struct ieee80211_tx_info *info, 607 struct ieee80211_hdr *hdr) 608 { 609 struct iwl_mvm_vif *mvmvif = 610 iwl_mvm_vif_from_mac80211(info->control.vif); 611 __le16 fc = hdr->frame_control; 612 613 switch (info->control.vif->type) { 614 case NL80211_IFTYPE_AP: 615 case NL80211_IFTYPE_ADHOC: 616 /* 617 * Non-bufferable frames use the broadcast station, thus they 618 * use the probe queue. 619 * Also take care of the case where we send a deauth to a 620 * station that we don't have, or similarly an association 621 * response (with non-success status) for a station we can't 622 * accept. 623 * Also, disassociate frames might happen, particular with 624 * reason 7 ("Class 3 frame received from nonassociated STA"). 625 */ 626 if (ieee80211_is_mgmt(fc) && 627 (!ieee80211_is_bufferable_mmpdu(fc) || 628 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 629 return mvm->probe_queue; 630 631 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 632 is_multicast_ether_addr(hdr->addr1)) 633 return mvmvif->cab_queue; 634 635 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 636 "fc=0x%02x", le16_to_cpu(fc)); 637 return mvm->probe_queue; 638 case NL80211_IFTYPE_P2P_DEVICE: 639 if (ieee80211_is_mgmt(fc)) 640 return mvm->p2p_dev_queue; 641 642 WARN_ON_ONCE(1); 643 return mvm->p2p_dev_queue; 644 default: 645 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 646 return -1; 647 } 648 } 649 650 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 651 struct sk_buff *skb) 652 { 653 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 654 struct iwl_mvm_vif *mvmvif = 655 iwl_mvm_vif_from_mac80211(info->control.vif); 656 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 657 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 658 struct iwl_probe_resp_data *resp_data; 659 u8 *ie, *pos; 660 u8 match[] = { 661 (WLAN_OUI_WFA >> 16) & 0xff, 662 (WLAN_OUI_WFA >> 8) & 0xff, 663 WLAN_OUI_WFA & 0xff, 664 WLAN_OUI_TYPE_WFA_P2P, 665 }; 666 667 rcu_read_lock(); 668 669 resp_data = rcu_dereference(mvmvif->probe_resp_data); 670 if (!resp_data) 671 goto out; 672 673 if (!resp_data->notif.noa_active) 674 goto out; 675 676 ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 677 mgmt->u.probe_resp.variable, 678 skb->len - base_len, 679 match, 4, 2); 680 if (!ie) { 681 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 682 goto out; 683 } 684 685 if (skb_tailroom(skb) < resp_data->noa_len) { 686 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 687 IWL_ERR(mvm, 688 "Failed to reallocate probe resp\n"); 689 goto out; 690 } 691 } 692 693 pos = skb_put(skb, resp_data->noa_len); 694 695 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 696 /* Set length of IE body (not including ID and length itself) */ 697 *pos++ = resp_data->noa_len - 2; 698 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 699 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 700 *pos++ = WLAN_OUI_WFA & 0xff; 701 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 702 703 memcpy(pos, &resp_data->notif.noa_attr, 704 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 705 706 out: 707 rcu_read_unlock(); 708 } 709 710 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 711 { 712 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 713 struct ieee80211_tx_info info; 714 struct iwl_device_tx_cmd *dev_cmd; 715 u8 sta_id; 716 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 717 __le16 fc = hdr->frame_control; 718 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 719 IEEE80211_TX_CTL_TX_OFFCHAN; 720 int queue = -1; 721 722 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 723 return -1; 724 725 memcpy(&info, skb->cb, sizeof(info)); 726 727 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 728 return -1; 729 730 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 731 return -1; 732 733 if (info.control.vif) { 734 struct iwl_mvm_vif *mvmvif = 735 iwl_mvm_vif_from_mac80211(info.control.vif); 736 737 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 738 info.control.vif->type == NL80211_IFTYPE_AP || 739 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 740 if (!ieee80211_is_data(hdr->frame_control)) 741 sta_id = mvmvif->bcast_sta.sta_id; 742 else 743 sta_id = mvmvif->mcast_sta.sta_id; 744 745 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr); 746 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 747 queue = mvm->snif_queue; 748 sta_id = mvm->snif_sta.sta_id; 749 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 750 offchannel) { 751 /* 752 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 753 * that can be used in 2 different types of vifs, P2P & 754 * STATION. 755 * P2P uses the offchannel queue. 756 * STATION (HS2.0) uses the auxiliary context of the FW, 757 * and hence needs to be sent on the aux queue. 758 */ 759 sta_id = mvm->aux_sta.sta_id; 760 queue = mvm->aux_queue; 761 } 762 } 763 764 if (queue < 0) { 765 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 766 return -1; 767 } 768 769 if (unlikely(ieee80211_is_probe_resp(fc))) 770 iwl_mvm_probe_resp_set_noa(mvm, skb); 771 772 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 773 774 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 775 if (!dev_cmd) 776 return -1; 777 778 /* From now on, we cannot access info->control */ 779 iwl_mvm_skb_prepare_status(skb, dev_cmd); 780 781 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 782 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 783 return -1; 784 } 785 786 return 0; 787 } 788 789 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 790 struct ieee80211_sta *sta, unsigned int tid) 791 { 792 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 793 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band; 794 u8 ac = tid_to_mac80211_ac[tid]; 795 unsigned int txf; 796 int lmac = iwl_mvm_get_lmac_id(mvm->fw, band); 797 798 /* For HE redirect to trigger based fifos */ 799 if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 800 ac += 4; 801 802 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 803 804 /* 805 * Don't send an AMSDU that will be longer than the TXF. 806 * Add a security margin of 256 for the TX command + headers. 807 * We also want to have the start of the next packet inside the 808 * fifo to be able to send bursts. 809 */ 810 return min_t(unsigned int, mvmsta->max_amsdu_len, 811 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 812 } 813 814 #ifdef CONFIG_INET 815 816 static int 817 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 818 netdev_features_t netdev_flags, 819 struct sk_buff_head *mpdus_skb) 820 { 821 struct sk_buff *tmp, *next; 822 struct ieee80211_hdr *hdr = (void *)skb->data; 823 char cb[sizeof(skb->cb)]; 824 u16 i = 0; 825 unsigned int tcp_payload_len; 826 unsigned int mss = skb_shinfo(skb)->gso_size; 827 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 828 bool qos = ieee80211_is_data_qos(hdr->frame_control); 829 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 830 831 skb_shinfo(skb)->gso_size = num_subframes * mss; 832 memcpy(cb, skb->cb, sizeof(cb)); 833 834 next = skb_gso_segment(skb, netdev_flags); 835 skb_shinfo(skb)->gso_size = mss; 836 if (WARN_ON_ONCE(IS_ERR(next))) 837 return -EINVAL; 838 else if (next) 839 consume_skb(skb); 840 841 skb_list_walk_safe(next, tmp, next) { 842 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 843 /* 844 * Compute the length of all the data added for the A-MSDU. 845 * This will be used to compute the length to write in the TX 846 * command. We have: SNAP + IP + TCP for n -1 subframes and 847 * ETH header for n subframes. 848 */ 849 tcp_payload_len = skb_tail_pointer(tmp) - 850 skb_transport_header(tmp) - 851 tcp_hdrlen(tmp) + tmp->data_len; 852 853 if (ipv4) 854 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 855 856 if (tcp_payload_len > mss) { 857 skb_shinfo(tmp)->gso_size = mss; 858 } else { 859 if (qos) { 860 u8 *qc; 861 862 if (ipv4) 863 ip_send_check(ip_hdr(tmp)); 864 865 qc = ieee80211_get_qos_ctl((void *)tmp->data); 866 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 867 } 868 skb_shinfo(tmp)->gso_size = 0; 869 } 870 871 skb_mark_not_on_list(tmp); 872 __skb_queue_tail(mpdus_skb, tmp); 873 i++; 874 } 875 876 return 0; 877 } 878 879 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 880 struct ieee80211_tx_info *info, 881 struct ieee80211_sta *sta, 882 struct sk_buff_head *mpdus_skb) 883 { 884 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 885 struct ieee80211_hdr *hdr = (void *)skb->data; 886 unsigned int mss = skb_shinfo(skb)->gso_size; 887 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 888 u16 snap_ip_tcp, pad; 889 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 890 u8 tid; 891 892 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 893 tcp_hdrlen(skb); 894 895 if (!mvmsta->max_amsdu_len || 896 !ieee80211_is_data_qos(hdr->frame_control) || 897 !mvmsta->amsdu_enabled) 898 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 899 900 /* 901 * Do not build AMSDU for IPv6 with extension headers. 902 * ask stack to segment and checkum the generated MPDUs for us. 903 */ 904 if (skb->protocol == htons(ETH_P_IPV6) && 905 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 906 IPPROTO_TCP) { 907 netdev_flags &= ~NETIF_F_CSUM_MASK; 908 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 909 } 910 911 tid = ieee80211_get_tid(hdr); 912 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 913 return -EINVAL; 914 915 /* 916 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 917 * during an BA session. 918 */ 919 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 920 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 921 !(mvmsta->amsdu_enabled & BIT(tid))) 922 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 923 924 /* 925 * Take the min of ieee80211 station and mvm station 926 */ 927 max_amsdu_len = 928 min_t(unsigned int, sta->max_amsdu_len, 929 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 930 931 /* 932 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 933 * supported. This is a spec requirement (IEEE 802.11-2015 934 * section 8.7.3 NOTE 3). 935 */ 936 if (info->flags & IEEE80211_TX_CTL_AMPDU && 937 !sta->vht_cap.vht_supported) 938 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 939 940 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 941 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 942 pad = (4 - subf_len) & 0x3; 943 944 /* 945 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 946 * N * subf_len + (N - 1) * pad. 947 */ 948 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 949 950 if (sta->max_amsdu_subframes && 951 num_subframes > sta->max_amsdu_subframes) 952 num_subframes = sta->max_amsdu_subframes; 953 954 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 955 tcp_hdrlen(skb) + skb->data_len; 956 957 /* 958 * Make sure we have enough TBs for the A-MSDU: 959 * 2 for each subframe 960 * 1 more for each fragment 961 * 1 more for the potential data in the header 962 */ 963 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 964 mvm->trans->max_skb_frags) 965 num_subframes = 1; 966 967 if (num_subframes > 1) 968 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 969 970 /* This skb fits in one single A-MSDU */ 971 if (num_subframes * mss >= tcp_payload_len) { 972 __skb_queue_tail(mpdus_skb, skb); 973 return 0; 974 } 975 976 /* 977 * Trick the segmentation function to make it 978 * create SKBs that can fit into one A-MSDU. 979 */ 980 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 981 mpdus_skb); 982 } 983 #else /* CONFIG_INET */ 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 /* Impossible to get TSO with CONFIG_INET */ 990 WARN_ON(1); 991 992 return -1; 993 } 994 #endif 995 996 /* Check if there are any timed-out TIDs on a given shared TXQ */ 997 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 998 { 999 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1000 unsigned long now = jiffies; 1001 int tid; 1002 1003 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1004 return false; 1005 1006 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1007 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1008 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1009 return true; 1010 } 1011 1012 return false; 1013 } 1014 1015 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1016 struct iwl_mvm_sta *mvmsta, 1017 int airtime) 1018 { 1019 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1020 struct iwl_mvm_tcm_mac *mdata; 1021 1022 if (mac >= NUM_MAC_INDEX_DRIVER) 1023 return; 1024 1025 mdata = &mvm->tcm.data[mac]; 1026 1027 if (mvm->tcm.paused) 1028 return; 1029 1030 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1031 schedule_delayed_work(&mvm->tcm.work, 0); 1032 1033 mdata->tx.airtime += airtime; 1034 } 1035 1036 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1037 struct iwl_mvm_sta *mvmsta, int tid) 1038 { 1039 u32 ac = tid_to_mac80211_ac[tid]; 1040 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1041 struct iwl_mvm_tcm_mac *mdata; 1042 1043 if (mac >= NUM_MAC_INDEX_DRIVER) 1044 return -EINVAL; 1045 1046 mdata = &mvm->tcm.data[mac]; 1047 1048 mdata->tx.pkts[ac]++; 1049 1050 return 0; 1051 } 1052 1053 /* 1054 * Sets the fields in the Tx cmd that are crypto related. 1055 * 1056 * This function must be called with BHs disabled. 1057 */ 1058 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1059 struct ieee80211_tx_info *info, 1060 struct ieee80211_sta *sta) 1061 { 1062 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1063 struct iwl_mvm_sta *mvmsta; 1064 struct iwl_device_tx_cmd *dev_cmd; 1065 __le16 fc; 1066 u16 seq_number = 0; 1067 u8 tid = IWL_MAX_TID_COUNT; 1068 u16 txq_id; 1069 bool is_ampdu = false; 1070 int hdrlen; 1071 1072 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1073 fc = hdr->frame_control; 1074 hdrlen = ieee80211_hdrlen(fc); 1075 1076 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1077 return -1; 1078 1079 if (WARN_ON_ONCE(!mvmsta)) 1080 return -1; 1081 1082 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1083 return -1; 1084 1085 if (unlikely(ieee80211_is_probe_resp(fc))) 1086 iwl_mvm_probe_resp_set_noa(mvm, skb); 1087 1088 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1089 sta, mvmsta->sta_id); 1090 if (!dev_cmd) 1091 goto drop; 1092 1093 /* 1094 * we handle that entirely ourselves -- for uAPSD the firmware 1095 * will always send a notification, and for PS-Poll responses 1096 * we'll notify mac80211 when getting frame status 1097 */ 1098 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1099 1100 spin_lock(&mvmsta->lock); 1101 1102 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1103 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 1104 * assignment of MGMT TID 1105 */ 1106 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1107 tid = ieee80211_get_tid(hdr); 1108 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1109 goto drop_unlock_sta; 1110 1111 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1112 if (WARN_ONCE(is_ampdu && 1113 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1114 "Invalid internal agg state %d for TID %d", 1115 mvmsta->tid_data[tid].state, tid)) 1116 goto drop_unlock_sta; 1117 1118 seq_number = mvmsta->tid_data[tid].seq_number; 1119 seq_number &= IEEE80211_SCTL_SEQ; 1120 1121 if (!iwl_mvm_has_new_tx_api(mvm)) { 1122 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1123 1124 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1125 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1126 /* update the tx_cmd hdr as it was already copied */ 1127 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1128 } 1129 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) { 1130 tid = IWL_TID_NON_QOS; 1131 } 1132 1133 txq_id = mvmsta->tid_data[tid].txq_id; 1134 1135 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1136 1137 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1138 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1139 spin_unlock(&mvmsta->lock); 1140 return -1; 1141 } 1142 1143 if (!iwl_mvm_has_new_tx_api(mvm)) { 1144 /* Keep track of the time of the last frame for this RA/TID */ 1145 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1146 1147 /* 1148 * If we have timed-out TIDs - schedule the worker that will 1149 * reconfig the queues and update them 1150 * 1151 * Note that the no lock is taken here in order to not serialize 1152 * the TX flow. This isn't dangerous because scheduling 1153 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1154 * schedule it due to some race condition then next TX we get 1155 * here we will. 1156 */ 1157 if (unlikely(mvm->queue_info[txq_id].status == 1158 IWL_MVM_QUEUE_SHARED && 1159 iwl_mvm_txq_should_update(mvm, txq_id))) 1160 schedule_work(&mvm->add_stream_wk); 1161 } 1162 1163 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1164 mvmsta->sta_id, tid, txq_id, 1165 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1166 1167 /* From now on, we cannot access info->control */ 1168 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1169 1170 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1171 goto drop_unlock_sta; 1172 1173 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1174 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1175 1176 spin_unlock(&mvmsta->lock); 1177 1178 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1179 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1180 goto drop; 1181 1182 return 0; 1183 1184 drop_unlock_sta: 1185 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1186 spin_unlock(&mvmsta->lock); 1187 drop: 1188 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid); 1189 return -1; 1190 } 1191 1192 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1193 struct ieee80211_sta *sta) 1194 { 1195 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1196 struct ieee80211_tx_info info; 1197 struct sk_buff_head mpdus_skbs; 1198 unsigned int payload_len; 1199 int ret; 1200 1201 if (WARN_ON_ONCE(!mvmsta)) 1202 return -1; 1203 1204 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1205 return -1; 1206 1207 memcpy(&info, skb->cb, sizeof(info)); 1208 1209 if (!skb_is_gso(skb)) 1210 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1211 1212 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1213 tcp_hdrlen(skb) + skb->data_len; 1214 1215 if (payload_len <= skb_shinfo(skb)->gso_size) 1216 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1217 1218 __skb_queue_head_init(&mpdus_skbs); 1219 1220 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1221 if (ret) 1222 return ret; 1223 1224 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1225 return ret; 1226 1227 while (!skb_queue_empty(&mpdus_skbs)) { 1228 skb = __skb_dequeue(&mpdus_skbs); 1229 1230 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1231 if (ret) { 1232 __skb_queue_purge(&mpdus_skbs); 1233 return ret; 1234 } 1235 } 1236 1237 return 0; 1238 } 1239 1240 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1241 struct ieee80211_sta *sta, u8 tid) 1242 { 1243 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1244 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1245 struct ieee80211_vif *vif = mvmsta->vif; 1246 u16 normalized_ssn; 1247 1248 lockdep_assert_held(&mvmsta->lock); 1249 1250 if ((tid_data->state == IWL_AGG_ON || 1251 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1252 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1253 /* 1254 * Now that this aggregation or DQA queue is empty tell 1255 * mac80211 so it knows we no longer have frames buffered for 1256 * the station on this TID (for the TIM bitmap calculation.) 1257 */ 1258 ieee80211_sta_set_buffered(sta, tid, false); 1259 } 1260 1261 /* 1262 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1263 * to align the wrap around of ssn so we compare relevant values. 1264 */ 1265 normalized_ssn = tid_data->ssn; 1266 if (mvm->trans->trans_cfg->gen2) 1267 normalized_ssn &= 0xff; 1268 1269 if (normalized_ssn != tid_data->next_reclaimed) 1270 return; 1271 1272 switch (tid_data->state) { 1273 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1274 IWL_DEBUG_TX_QUEUES(mvm, 1275 "Can continue addBA flow ssn = next_recl = %d\n", 1276 tid_data->next_reclaimed); 1277 tid_data->state = IWL_AGG_STARTING; 1278 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1279 break; 1280 1281 case IWL_EMPTYING_HW_QUEUE_DELBA: 1282 IWL_DEBUG_TX_QUEUES(mvm, 1283 "Can continue DELBA flow ssn = next_recl = %d\n", 1284 tid_data->next_reclaimed); 1285 tid_data->state = IWL_AGG_OFF; 1286 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1287 break; 1288 1289 default: 1290 break; 1291 } 1292 } 1293 1294 #ifdef CONFIG_IWLWIFI_DEBUG 1295 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1296 { 1297 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1298 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1299 1300 switch (status & TX_STATUS_MSK) { 1301 case TX_STATUS_SUCCESS: 1302 return "SUCCESS"; 1303 TX_STATUS_POSTPONE(DELAY); 1304 TX_STATUS_POSTPONE(FEW_BYTES); 1305 TX_STATUS_POSTPONE(BT_PRIO); 1306 TX_STATUS_POSTPONE(QUIET_PERIOD); 1307 TX_STATUS_POSTPONE(CALC_TTAK); 1308 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1309 TX_STATUS_FAIL(SHORT_LIMIT); 1310 TX_STATUS_FAIL(LONG_LIMIT); 1311 TX_STATUS_FAIL(UNDERRUN); 1312 TX_STATUS_FAIL(DRAIN_FLOW); 1313 TX_STATUS_FAIL(RFKILL_FLUSH); 1314 TX_STATUS_FAIL(LIFE_EXPIRE); 1315 TX_STATUS_FAIL(DEST_PS); 1316 TX_STATUS_FAIL(HOST_ABORTED); 1317 TX_STATUS_FAIL(BT_RETRY); 1318 TX_STATUS_FAIL(STA_INVALID); 1319 TX_STATUS_FAIL(FRAG_DROPPED); 1320 TX_STATUS_FAIL(TID_DISABLE); 1321 TX_STATUS_FAIL(FIFO_FLUSHED); 1322 TX_STATUS_FAIL(SMALL_CF_POLL); 1323 TX_STATUS_FAIL(FW_DROP); 1324 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1325 } 1326 1327 return "UNKNOWN"; 1328 1329 #undef TX_STATUS_FAIL 1330 #undef TX_STATUS_POSTPONE 1331 } 1332 #endif /* CONFIG_IWLWIFI_DEBUG */ 1333 1334 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1335 enum nl80211_band band, 1336 struct ieee80211_tx_rate *r) 1337 { 1338 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1339 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1340 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1341 case RATE_MCS_CHAN_WIDTH_20: 1342 break; 1343 case RATE_MCS_CHAN_WIDTH_40: 1344 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1345 break; 1346 case RATE_MCS_CHAN_WIDTH_80: 1347 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1348 break; 1349 case RATE_MCS_CHAN_WIDTH_160: 1350 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1351 break; 1352 } 1353 if (rate_n_flags & RATE_MCS_SGI_MSK) 1354 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1355 if (rate_n_flags & RATE_MCS_HT_MSK) { 1356 r->flags |= IEEE80211_TX_RC_MCS; 1357 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1358 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1359 ieee80211_rate_set_vht( 1360 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1361 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1362 RATE_VHT_MCS_NSS_POS) + 1); 1363 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1364 } else { 1365 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1366 band); 1367 } 1368 } 1369 1370 /* 1371 * translate ucode response to mac80211 tx status control values 1372 */ 1373 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1374 struct ieee80211_tx_info *info) 1375 { 1376 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1377 1378 info->status.antenna = 1379 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1380 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1381 } 1382 1383 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1384 u32 status) 1385 { 1386 struct iwl_fw_dbg_trigger_tlv *trig; 1387 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1388 int i; 1389 1390 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1391 FW_DBG_TRIGGER_TX_STATUS); 1392 if (!trig) 1393 return; 1394 1395 status_trig = (void *)trig->data; 1396 1397 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1398 /* don't collect on status 0 */ 1399 if (!status_trig->statuses[i].status) 1400 break; 1401 1402 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1403 continue; 1404 1405 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1406 "Tx status %d was received", 1407 status & TX_STATUS_MSK); 1408 break; 1409 } 1410 } 1411 1412 /* 1413 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1414 * @tx_resp: the Tx response from the fw (agg or non-agg) 1415 * 1416 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1417 * it can't know that everything will go well until the end of the AMPDU, it 1418 * can't know in advance the number of MPDUs that will be sent in the current 1419 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1420 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1421 * of the batch. This is why the SSN of the SCD is written at the end of the 1422 * whole struct at a variable offset. This function knows how to cope with the 1423 * variable offset and returns the SSN of the SCD. 1424 */ 1425 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1426 struct iwl_mvm_tx_resp *tx_resp) 1427 { 1428 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1429 tx_resp->frame_count) & 0xfff; 1430 } 1431 1432 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1433 struct iwl_rx_packet *pkt) 1434 { 1435 struct ieee80211_sta *sta; 1436 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1437 int txq_id = SEQ_TO_QUEUE(sequence); 1438 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1439 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1440 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1441 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1442 struct agg_tx_status *agg_status = 1443 iwl_mvm_get_agg_status(mvm, tx_resp); 1444 u32 status = le16_to_cpu(agg_status->status); 1445 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1446 struct sk_buff_head skbs; 1447 u8 skb_freed = 0; 1448 u8 lq_color; 1449 u16 next_reclaimed, seq_ctl; 1450 bool is_ndp = false; 1451 1452 __skb_queue_head_init(&skbs); 1453 1454 if (iwl_mvm_has_new_tx_api(mvm)) 1455 txq_id = le16_to_cpu(tx_resp->tx_queue); 1456 1457 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1458 1459 /* we can free until ssn % q.n_bd not inclusive */ 1460 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1461 1462 while (!skb_queue_empty(&skbs)) { 1463 struct sk_buff *skb = __skb_dequeue(&skbs); 1464 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1465 struct ieee80211_hdr *hdr = (void *)skb->data; 1466 bool flushed = false; 1467 1468 skb_freed++; 1469 1470 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1471 1472 memset(&info->status, 0, sizeof(info->status)); 1473 1474 /* inform mac80211 about what happened with the frame */ 1475 switch (status & TX_STATUS_MSK) { 1476 case TX_STATUS_SUCCESS: 1477 case TX_STATUS_DIRECT_DONE: 1478 info->flags |= IEEE80211_TX_STAT_ACK; 1479 break; 1480 case TX_STATUS_FAIL_FIFO_FLUSHED: 1481 case TX_STATUS_FAIL_DRAIN_FLOW: 1482 flushed = true; 1483 break; 1484 case TX_STATUS_FAIL_DEST_PS: 1485 /* the FW should have stopped the queue and not 1486 * return this status 1487 */ 1488 WARN_ON(1); 1489 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1490 break; 1491 default: 1492 break; 1493 } 1494 1495 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1496 ieee80211_is_mgmt(hdr->frame_control)) 1497 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1498 1499 /* 1500 * If we are freeing multiple frames, mark all the frames 1501 * but the first one as acked, since they were acknowledged 1502 * before 1503 * */ 1504 if (skb_freed > 1) 1505 info->flags |= IEEE80211_TX_STAT_ACK; 1506 1507 iwl_mvm_tx_status_check_trigger(mvm, status); 1508 1509 info->status.rates[0].count = tx_resp->failure_frame + 1; 1510 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1511 info); 1512 info->status.status_driver_data[1] = 1513 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1514 1515 /* Single frame failure in an AMPDU queue => send BAR */ 1516 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1517 !(info->flags & IEEE80211_TX_STAT_ACK) && 1518 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1519 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1520 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1521 1522 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1523 if (ieee80211_is_back_req(hdr->frame_control)) 1524 seq_ctl = 0; 1525 else if (status != TX_STATUS_SUCCESS) 1526 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1527 1528 if (unlikely(!seq_ctl)) { 1529 struct ieee80211_hdr *hdr = (void *)skb->data; 1530 1531 /* 1532 * If it is an NDP, we can't update next_reclaim since 1533 * its sequence control is 0. Note that for that same 1534 * reason, NDPs are never sent to A-MPDU'able queues 1535 * so that we can never have more than one freed frame 1536 * for a single Tx resonse (see WARN_ON below). 1537 */ 1538 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1539 is_ndp = true; 1540 } 1541 1542 /* 1543 * TODO: this is not accurate if we are freeing more than one 1544 * packet. 1545 */ 1546 info->status.tx_time = 1547 le16_to_cpu(tx_resp->wireless_media_time); 1548 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1549 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1550 info->status.status_driver_data[0] = 1551 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1552 1553 ieee80211_tx_status(mvm->hw, skb); 1554 } 1555 1556 /* This is an aggregation queue or might become one, so we use 1557 * the ssn since: ssn = wifi seq_num % 256. 1558 * The seq_ctl is the sequence control of the packet to which 1559 * this Tx response relates. But if there is a hole in the 1560 * bitmap of the BA we received, this Tx response may allow to 1561 * reclaim the hole and all the subsequent packets that were 1562 * already acked. In that case, seq_ctl != ssn, and the next 1563 * packet to be reclaimed will be ssn and not seq_ctl. In that 1564 * case, several packets will be reclaimed even if 1565 * frame_count = 1. 1566 * 1567 * The ssn is the index (% 256) of the latest packet that has 1568 * treated (acked / dropped) + 1. 1569 */ 1570 next_reclaimed = ssn; 1571 1572 IWL_DEBUG_TX_REPLY(mvm, 1573 "TXQ %d status %s (0x%08x)\n", 1574 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1575 1576 IWL_DEBUG_TX_REPLY(mvm, 1577 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1578 le32_to_cpu(tx_resp->initial_rate), 1579 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1580 ssn, next_reclaimed, seq_ctl); 1581 1582 rcu_read_lock(); 1583 1584 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1585 /* 1586 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1587 * the firmware while we still have packets for it in the Tx queues. 1588 */ 1589 if (WARN_ON_ONCE(!sta)) 1590 goto out; 1591 1592 if (!IS_ERR(sta)) { 1593 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1594 1595 iwl_mvm_tx_airtime(mvm, mvmsta, 1596 le16_to_cpu(tx_resp->wireless_media_time)); 1597 1598 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1599 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1600 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1601 1602 if (sta->wme && tid != IWL_MGMT_TID) { 1603 struct iwl_mvm_tid_data *tid_data = 1604 &mvmsta->tid_data[tid]; 1605 bool send_eosp_ndp = false; 1606 1607 spin_lock_bh(&mvmsta->lock); 1608 1609 if (!is_ndp) { 1610 tid_data->next_reclaimed = next_reclaimed; 1611 IWL_DEBUG_TX_REPLY(mvm, 1612 "Next reclaimed packet:%d\n", 1613 next_reclaimed); 1614 } else { 1615 IWL_DEBUG_TX_REPLY(mvm, 1616 "NDP - don't update next_reclaimed\n"); 1617 } 1618 1619 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1620 1621 if (mvmsta->sleep_tx_count) { 1622 mvmsta->sleep_tx_count--; 1623 if (mvmsta->sleep_tx_count && 1624 !iwl_mvm_tid_queued(mvm, tid_data)) { 1625 /* 1626 * The number of frames in the queue 1627 * dropped to 0 even if we sent less 1628 * frames than we thought we had on the 1629 * Tx queue. 1630 * This means we had holes in the BA 1631 * window that we just filled, ask 1632 * mac80211 to send EOSP since the 1633 * firmware won't know how to do that. 1634 * Send NDP and the firmware will send 1635 * EOSP notification that will trigger 1636 * a call to ieee80211_sta_eosp(). 1637 */ 1638 send_eosp_ndp = true; 1639 } 1640 } 1641 1642 spin_unlock_bh(&mvmsta->lock); 1643 if (send_eosp_ndp) { 1644 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1645 IEEE80211_FRAME_RELEASE_UAPSD, 1646 1, tid, false, false); 1647 mvmsta->sleep_tx_count = 0; 1648 ieee80211_send_eosp_nullfunc(sta, tid); 1649 } 1650 } 1651 1652 if (mvmsta->next_status_eosp) { 1653 mvmsta->next_status_eosp = false; 1654 ieee80211_sta_eosp(sta); 1655 } 1656 } 1657 out: 1658 rcu_read_unlock(); 1659 } 1660 1661 #ifdef CONFIG_IWLWIFI_DEBUG 1662 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1663 static const char *iwl_get_agg_tx_status(u16 status) 1664 { 1665 switch (status & AGG_TX_STATE_STATUS_MSK) { 1666 AGG_TX_STATE_(TRANSMITTED); 1667 AGG_TX_STATE_(UNDERRUN); 1668 AGG_TX_STATE_(BT_PRIO); 1669 AGG_TX_STATE_(FEW_BYTES); 1670 AGG_TX_STATE_(ABORT); 1671 AGG_TX_STATE_(TX_ON_AIR_DROP); 1672 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1673 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1674 AGG_TX_STATE_(SCD_QUERY); 1675 AGG_TX_STATE_(TEST_BAD_CRC32); 1676 AGG_TX_STATE_(RESPONSE); 1677 AGG_TX_STATE_(DUMP_TX); 1678 AGG_TX_STATE_(DELAY_TX); 1679 } 1680 1681 return "UNKNOWN"; 1682 } 1683 1684 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1685 struct iwl_rx_packet *pkt) 1686 { 1687 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1688 struct agg_tx_status *frame_status = 1689 iwl_mvm_get_agg_status(mvm, tx_resp); 1690 int i; 1691 1692 for (i = 0; i < tx_resp->frame_count; i++) { 1693 u16 fstatus = le16_to_cpu(frame_status[i].status); 1694 1695 IWL_DEBUG_TX_REPLY(mvm, 1696 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1697 iwl_get_agg_tx_status(fstatus), 1698 fstatus & AGG_TX_STATE_STATUS_MSK, 1699 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1700 AGG_TX_STATE_TRY_CNT_POS, 1701 le16_to_cpu(frame_status[i].sequence)); 1702 } 1703 } 1704 #else 1705 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1706 struct iwl_rx_packet *pkt) 1707 {} 1708 #endif /* CONFIG_IWLWIFI_DEBUG */ 1709 1710 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1711 struct iwl_rx_packet *pkt) 1712 { 1713 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1714 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1715 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1716 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1717 struct iwl_mvm_sta *mvmsta; 1718 int queue = SEQ_TO_QUEUE(sequence); 1719 struct ieee80211_sta *sta; 1720 1721 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1722 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1723 return; 1724 1725 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1726 1727 rcu_read_lock(); 1728 1729 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1730 1731 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1732 if (WARN_ON_ONCE(!sta || !sta->wme)) { 1733 rcu_read_unlock(); 1734 return; 1735 } 1736 1737 if (!WARN_ON_ONCE(!mvmsta)) { 1738 mvmsta->tid_data[tid].rate_n_flags = 1739 le32_to_cpu(tx_resp->initial_rate); 1740 mvmsta->tid_data[tid].tx_time = 1741 le16_to_cpu(tx_resp->wireless_media_time); 1742 mvmsta->tid_data[tid].lq_color = 1743 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1744 iwl_mvm_tx_airtime(mvm, mvmsta, 1745 le16_to_cpu(tx_resp->wireless_media_time)); 1746 } 1747 1748 rcu_read_unlock(); 1749 } 1750 1751 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1752 { 1753 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1754 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1755 1756 if (tx_resp->frame_count == 1) 1757 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1758 else 1759 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1760 } 1761 1762 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1763 int txq, int index, 1764 struct ieee80211_tx_info *ba_info, u32 rate) 1765 { 1766 struct sk_buff_head reclaimed_skbs; 1767 struct iwl_mvm_tid_data *tid_data = NULL; 1768 struct ieee80211_sta *sta; 1769 struct iwl_mvm_sta *mvmsta = NULL; 1770 struct sk_buff *skb; 1771 int freed; 1772 1773 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1774 tid > IWL_MAX_TID_COUNT, 1775 "sta_id %d tid %d", sta_id, tid)) 1776 return; 1777 1778 rcu_read_lock(); 1779 1780 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1781 1782 /* Reclaiming frames for a station that has been deleted ? */ 1783 if (WARN_ON_ONCE(!sta)) { 1784 rcu_read_unlock(); 1785 return; 1786 } 1787 1788 __skb_queue_head_init(&reclaimed_skbs); 1789 1790 /* 1791 * Release all TFDs before the SSN, i.e. all TFDs in front of 1792 * block-ack window (we assume that they've been successfully 1793 * transmitted ... if not, it's too late anyway). 1794 */ 1795 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1796 1797 skb_queue_walk(&reclaimed_skbs, skb) { 1798 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1799 1800 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1801 1802 memset(&info->status, 0, sizeof(info->status)); 1803 /* Packet was transmitted successfully, failures come as single 1804 * frames because before failing a frame the firmware transmits 1805 * it without aggregation at least once. 1806 */ 1807 info->flags |= IEEE80211_TX_STAT_ACK; 1808 } 1809 1810 /* 1811 * It's possible to get a BA response after invalidating the rcu (rcu is 1812 * invalidated in order to prevent new Tx from being sent, but there may 1813 * be some frames already in-flight). 1814 * In this case we just want to reclaim, and could skip all the 1815 * sta-dependent stuff since it's in the middle of being removed 1816 * anyways. 1817 */ 1818 if (IS_ERR(sta)) 1819 goto out; 1820 1821 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1822 tid_data = &mvmsta->tid_data[tid]; 1823 1824 if (tid_data->txq_id != txq) { 1825 IWL_ERR(mvm, 1826 "invalid BA notification: Q %d, tid %d\n", 1827 tid_data->txq_id, tid); 1828 rcu_read_unlock(); 1829 return; 1830 } 1831 1832 spin_lock_bh(&mvmsta->lock); 1833 1834 tid_data->next_reclaimed = index; 1835 1836 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1837 1838 freed = 0; 1839 1840 /* pack lq color from tid_data along the reduced txp */ 1841 ba_info->status.status_driver_data[0] = 1842 RS_DRV_DATA_PACK(tid_data->lq_color, 1843 ba_info->status.status_driver_data[0]); 1844 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1845 1846 skb_queue_walk(&reclaimed_skbs, skb) { 1847 struct ieee80211_hdr *hdr = (void *)skb->data; 1848 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1849 1850 if (ieee80211_is_data_qos(hdr->frame_control)) 1851 freed++; 1852 else 1853 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1854 1855 /* this is the first skb we deliver in this batch */ 1856 /* put the rate scaling data there */ 1857 if (freed == 1) { 1858 info->flags |= IEEE80211_TX_STAT_AMPDU; 1859 memcpy(&info->status, &ba_info->status, 1860 sizeof(ba_info->status)); 1861 iwl_mvm_hwrate_to_tx_status(rate, info); 1862 } 1863 } 1864 1865 spin_unlock_bh(&mvmsta->lock); 1866 1867 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1868 * possible (i.e. first MPDU in the aggregation wasn't acked) 1869 * Still it's important to update RS about sent vs. acked. 1870 */ 1871 if (skb_queue_empty(&reclaimed_skbs)) { 1872 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1873 1874 if (mvmsta->vif) 1875 chanctx_conf = 1876 rcu_dereference(mvmsta->vif->chanctx_conf); 1877 1878 if (WARN_ON_ONCE(!chanctx_conf)) 1879 goto out; 1880 1881 ba_info->band = chanctx_conf->def.chan->band; 1882 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1883 1884 if (!iwl_mvm_has_tlc_offload(mvm)) { 1885 IWL_DEBUG_TX_REPLY(mvm, 1886 "No reclaim. Update rs directly\n"); 1887 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1888 } 1889 } 1890 1891 out: 1892 rcu_read_unlock(); 1893 1894 while (!skb_queue_empty(&reclaimed_skbs)) { 1895 skb = __skb_dequeue(&reclaimed_skbs); 1896 ieee80211_tx_status(mvm->hw, skb); 1897 } 1898 } 1899 1900 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1901 { 1902 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1903 int sta_id, tid, txq, index; 1904 struct ieee80211_tx_info ba_info = {}; 1905 struct iwl_mvm_ba_notif *ba_notif; 1906 struct iwl_mvm_tid_data *tid_data; 1907 struct iwl_mvm_sta *mvmsta; 1908 1909 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1910 1911 if (iwl_mvm_has_new_tx_api(mvm)) { 1912 struct iwl_mvm_compressed_ba_notif *ba_res = 1913 (void *)pkt->data; 1914 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 1915 int i; 1916 1917 sta_id = ba_res->sta_id; 1918 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1919 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1920 ba_info.status.tx_time = 1921 (u16)le32_to_cpu(ba_res->wireless_time); 1922 ba_info.status.status_driver_data[0] = 1923 (void *)(uintptr_t)ba_res->reduced_txp; 1924 1925 if (!le16_to_cpu(ba_res->tfd_cnt)) 1926 goto out; 1927 1928 rcu_read_lock(); 1929 1930 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1931 /* 1932 * It's possible to get a BA response after invalidating the rcu 1933 * (rcu is invalidated in order to prevent new Tx from being 1934 * sent, but there may be some frames already in-flight). 1935 * In this case we just want to reclaim, and could skip all the 1936 * sta-dependent stuff since it's in the middle of being removed 1937 * anyways. 1938 */ 1939 1940 /* Free per TID */ 1941 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { 1942 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1943 &ba_res->tfd[i]; 1944 1945 tid = ba_tfd->tid; 1946 if (tid == IWL_MGMT_TID) 1947 tid = IWL_MAX_TID_COUNT; 1948 1949 if (mvmsta) 1950 mvmsta->tid_data[i].lq_color = lq_color; 1951 1952 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 1953 (int)(le16_to_cpu(ba_tfd->q_num)), 1954 le16_to_cpu(ba_tfd->tfd_index), 1955 &ba_info, 1956 le32_to_cpu(ba_res->tx_rate)); 1957 } 1958 1959 if (mvmsta) 1960 iwl_mvm_tx_airtime(mvm, mvmsta, 1961 le32_to_cpu(ba_res->wireless_time)); 1962 rcu_read_unlock(); 1963 out: 1964 IWL_DEBUG_TX_REPLY(mvm, 1965 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1966 sta_id, le32_to_cpu(ba_res->flags), 1967 le16_to_cpu(ba_res->txed), 1968 le16_to_cpu(ba_res->done)); 1969 return; 1970 } 1971 1972 ba_notif = (void *)pkt->data; 1973 sta_id = ba_notif->sta_id; 1974 tid = ba_notif->tid; 1975 /* "flow" corresponds to Tx queue */ 1976 txq = le16_to_cpu(ba_notif->scd_flow); 1977 /* "ssn" is start of block-ack Tx window, corresponds to index 1978 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1979 index = le16_to_cpu(ba_notif->scd_ssn); 1980 1981 rcu_read_lock(); 1982 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1983 if (WARN_ON_ONCE(!mvmsta)) { 1984 rcu_read_unlock(); 1985 return; 1986 } 1987 1988 tid_data = &mvmsta->tid_data[tid]; 1989 1990 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1991 ba_info.status.ampdu_len = ba_notif->txed; 1992 ba_info.status.tx_time = tid_data->tx_time; 1993 ba_info.status.status_driver_data[0] = 1994 (void *)(uintptr_t)ba_notif->reduced_txp; 1995 1996 rcu_read_unlock(); 1997 1998 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1999 tid_data->rate_n_flags); 2000 2001 IWL_DEBUG_TX_REPLY(mvm, 2002 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2003 ba_notif->sta_addr, ba_notif->sta_id); 2004 2005 IWL_DEBUG_TX_REPLY(mvm, 2006 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2007 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2008 le64_to_cpu(ba_notif->bitmap), txq, index, 2009 ba_notif->txed, ba_notif->txed_2_done); 2010 2011 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2012 ba_notif->reduced_txp); 2013 } 2014 2015 /* 2016 * Note that there are transports that buffer frames before they reach 2017 * the firmware. This means that after flush_tx_path is called, the 2018 * queue might not be empty. The race-free way to handle this is to: 2019 * 1) set the station as draining 2020 * 2) flush the Tx path 2021 * 3) wait for the transport queues to be empty 2022 */ 2023 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 2024 { 2025 int ret; 2026 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2027 .queues_ctl = cpu_to_le32(tfd_msk), 2028 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2029 }; 2030 2031 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2032 2033 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2034 sizeof(flush_cmd), &flush_cmd); 2035 if (ret) 2036 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2037 return ret; 2038 } 2039 2040 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, 2041 u16 tids, u32 flags) 2042 { 2043 int ret; 2044 struct iwl_tx_path_flush_cmd flush_cmd = { 2045 .sta_id = cpu_to_le32(sta_id), 2046 .tid_mask = cpu_to_le16(tids), 2047 }; 2048 2049 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2050 2051 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2052 sizeof(flush_cmd), &flush_cmd); 2053 if (ret) 2054 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2055 return ret; 2056 } 2057 2058 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal) 2059 { 2060 struct iwl_mvm_int_sta *int_sta = sta; 2061 struct iwl_mvm_sta *mvm_sta = sta; 2062 2063 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != 2064 offsetof(struct iwl_mvm_sta, sta_id)); 2065 2066 if (iwl_mvm_has_new_tx_api(mvm)) 2067 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xffff, 0); 2068 2069 if (internal) 2070 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 0); 2071 2072 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0); 2073 } 2074