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 - 2019 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 - 2019 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_LMAC_24G_INDEX; 797 798 if (iwl_mvm_is_cdb_supported(mvm) && 799 band == NL80211_BAND_5GHZ) 800 lmac = IWL_LMAC_5G_INDEX; 801 802 /* For HE redirect to trigger based fifos */ 803 if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 804 ac += 4; 805 806 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 807 808 /* 809 * Don't send an AMSDU that will be longer than the TXF. 810 * Add a security margin of 256 for the TX command + headers. 811 * We also want to have the start of the next packet inside the 812 * fifo to be able to send bursts. 813 */ 814 return min_t(unsigned int, mvmsta->max_amsdu_len, 815 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 816 } 817 818 #ifdef CONFIG_INET 819 820 static int 821 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 822 netdev_features_t netdev_flags, 823 struct sk_buff_head *mpdus_skb) 824 { 825 struct sk_buff *tmp, *next; 826 struct ieee80211_hdr *hdr = (void *)skb->data; 827 char cb[sizeof(skb->cb)]; 828 u16 i = 0; 829 unsigned int tcp_payload_len; 830 unsigned int mss = skb_shinfo(skb)->gso_size; 831 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 832 bool qos = ieee80211_is_data_qos(hdr->frame_control); 833 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 834 835 skb_shinfo(skb)->gso_size = num_subframes * mss; 836 memcpy(cb, skb->cb, sizeof(cb)); 837 838 next = skb_gso_segment(skb, netdev_flags); 839 skb_shinfo(skb)->gso_size = mss; 840 if (WARN_ON_ONCE(IS_ERR(next))) 841 return -EINVAL; 842 else if (next) 843 consume_skb(skb); 844 845 skb_list_walk_safe(next, tmp, next) { 846 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 847 /* 848 * Compute the length of all the data added for the A-MSDU. 849 * This will be used to compute the length to write in the TX 850 * command. We have: SNAP + IP + TCP for n -1 subframes and 851 * ETH header for n subframes. 852 */ 853 tcp_payload_len = skb_tail_pointer(tmp) - 854 skb_transport_header(tmp) - 855 tcp_hdrlen(tmp) + tmp->data_len; 856 857 if (ipv4) 858 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 859 860 if (tcp_payload_len > mss) { 861 skb_shinfo(tmp)->gso_size = mss; 862 } else { 863 if (qos) { 864 u8 *qc; 865 866 if (ipv4) 867 ip_send_check(ip_hdr(tmp)); 868 869 qc = ieee80211_get_qos_ctl((void *)tmp->data); 870 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 871 } 872 skb_shinfo(tmp)->gso_size = 0; 873 } 874 875 skb_mark_not_on_list(tmp); 876 __skb_queue_tail(mpdus_skb, tmp); 877 i++; 878 } 879 880 return 0; 881 } 882 883 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 884 struct ieee80211_tx_info *info, 885 struct ieee80211_sta *sta, 886 struct sk_buff_head *mpdus_skb) 887 { 888 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 889 struct ieee80211_hdr *hdr = (void *)skb->data; 890 unsigned int mss = skb_shinfo(skb)->gso_size; 891 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 892 u16 snap_ip_tcp, pad; 893 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 894 u8 tid; 895 896 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 897 tcp_hdrlen(skb); 898 899 if (!mvmsta->max_amsdu_len || 900 !ieee80211_is_data_qos(hdr->frame_control) || 901 !mvmsta->amsdu_enabled) 902 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 903 904 /* 905 * Do not build AMSDU for IPv6 with extension headers. 906 * ask stack to segment and checkum the generated MPDUs for us. 907 */ 908 if (skb->protocol == htons(ETH_P_IPV6) && 909 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 910 IPPROTO_TCP) { 911 netdev_flags &= ~NETIF_F_CSUM_MASK; 912 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 913 } 914 915 tid = ieee80211_get_tid(hdr); 916 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 917 return -EINVAL; 918 919 /* 920 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 921 * during an BA session. 922 */ 923 if (info->flags & IEEE80211_TX_CTL_AMPDU && 924 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) 925 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 926 927 if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) || 928 !(mvmsta->amsdu_enabled & BIT(tid))) 929 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 930 931 /* 932 * Take the min of ieee80211 station and mvm station 933 */ 934 max_amsdu_len = 935 min_t(unsigned int, sta->max_amsdu_len, 936 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 937 938 /* 939 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 940 * supported. This is a spec requirement (IEEE 802.11-2015 941 * section 8.7.3 NOTE 3). 942 */ 943 if (info->flags & IEEE80211_TX_CTL_AMPDU && 944 !sta->vht_cap.vht_supported) 945 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 946 947 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 948 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 949 pad = (4 - subf_len) & 0x3; 950 951 /* 952 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 953 * N * subf_len + (N - 1) * pad. 954 */ 955 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 956 957 if (sta->max_amsdu_subframes && 958 num_subframes > sta->max_amsdu_subframes) 959 num_subframes = sta->max_amsdu_subframes; 960 961 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 962 tcp_hdrlen(skb) + skb->data_len; 963 964 /* 965 * Make sure we have enough TBs for the A-MSDU: 966 * 2 for each subframe 967 * 1 more for each fragment 968 * 1 more for the potential data in the header 969 */ 970 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 971 mvm->trans->max_skb_frags) 972 num_subframes = 1; 973 974 if (num_subframes > 1) 975 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 976 977 /* This skb fits in one single A-MSDU */ 978 if (num_subframes * mss >= tcp_payload_len) { 979 __skb_queue_tail(mpdus_skb, skb); 980 return 0; 981 } 982 983 /* 984 * Trick the segmentation function to make it 985 * create SKBs that can fit into one A-MSDU. 986 */ 987 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 988 mpdus_skb); 989 } 990 #else /* CONFIG_INET */ 991 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 992 struct ieee80211_tx_info *info, 993 struct ieee80211_sta *sta, 994 struct sk_buff_head *mpdus_skb) 995 { 996 /* Impossible to get TSO with CONFIG_INET */ 997 WARN_ON(1); 998 999 return -1; 1000 } 1001 #endif 1002 1003 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1004 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1005 { 1006 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1007 unsigned long now = jiffies; 1008 int tid; 1009 1010 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1011 return false; 1012 1013 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1014 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1015 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1016 return true; 1017 } 1018 1019 return false; 1020 } 1021 1022 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1023 struct iwl_mvm_sta *mvmsta, 1024 int airtime) 1025 { 1026 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1027 struct iwl_mvm_tcm_mac *mdata; 1028 1029 if (mac >= NUM_MAC_INDEX_DRIVER) 1030 return; 1031 1032 mdata = &mvm->tcm.data[mac]; 1033 1034 if (mvm->tcm.paused) 1035 return; 1036 1037 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1038 schedule_delayed_work(&mvm->tcm.work, 0); 1039 1040 mdata->tx.airtime += airtime; 1041 } 1042 1043 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1044 struct iwl_mvm_sta *mvmsta, int tid) 1045 { 1046 u32 ac = tid_to_mac80211_ac[tid]; 1047 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1048 struct iwl_mvm_tcm_mac *mdata; 1049 1050 if (mac >= NUM_MAC_INDEX_DRIVER) 1051 return -EINVAL; 1052 1053 mdata = &mvm->tcm.data[mac]; 1054 1055 mdata->tx.pkts[ac]++; 1056 1057 return 0; 1058 } 1059 1060 /* 1061 * Sets the fields in the Tx cmd that are crypto related. 1062 * 1063 * This function must be called with BHs disabled. 1064 */ 1065 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1066 struct ieee80211_tx_info *info, 1067 struct ieee80211_sta *sta) 1068 { 1069 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1070 struct iwl_mvm_sta *mvmsta; 1071 struct iwl_device_tx_cmd *dev_cmd; 1072 __le16 fc; 1073 u16 seq_number = 0; 1074 u8 tid = IWL_MAX_TID_COUNT; 1075 u16 txq_id; 1076 bool is_ampdu = false; 1077 int hdrlen; 1078 1079 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1080 fc = hdr->frame_control; 1081 hdrlen = ieee80211_hdrlen(fc); 1082 1083 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1084 return -1; 1085 1086 if (WARN_ON_ONCE(!mvmsta)) 1087 return -1; 1088 1089 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1090 return -1; 1091 1092 if (unlikely(ieee80211_is_probe_resp(fc))) 1093 iwl_mvm_probe_resp_set_noa(mvm, skb); 1094 1095 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1096 sta, mvmsta->sta_id); 1097 if (!dev_cmd) 1098 goto drop; 1099 1100 /* 1101 * we handle that entirely ourselves -- for uAPSD the firmware 1102 * will always send a notification, and for PS-Poll responses 1103 * we'll notify mac80211 when getting frame status 1104 */ 1105 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1106 1107 spin_lock(&mvmsta->lock); 1108 1109 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1110 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 1111 * assignment of MGMT TID 1112 */ 1113 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1114 tid = ieee80211_get_tid(hdr); 1115 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1116 goto drop_unlock_sta; 1117 1118 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1119 if (WARN_ONCE(is_ampdu && 1120 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1121 "Invalid internal agg state %d for TID %d", 1122 mvmsta->tid_data[tid].state, tid)) 1123 goto drop_unlock_sta; 1124 1125 seq_number = mvmsta->tid_data[tid].seq_number; 1126 seq_number &= IEEE80211_SCTL_SEQ; 1127 1128 if (!iwl_mvm_has_new_tx_api(mvm)) { 1129 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1130 1131 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1132 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1133 /* update the tx_cmd hdr as it was already copied */ 1134 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1135 } 1136 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) { 1137 tid = IWL_TID_NON_QOS; 1138 } 1139 1140 txq_id = mvmsta->tid_data[tid].txq_id; 1141 1142 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1143 1144 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1145 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1146 spin_unlock(&mvmsta->lock); 1147 return -1; 1148 } 1149 1150 if (!iwl_mvm_has_new_tx_api(mvm)) { 1151 /* Keep track of the time of the last frame for this RA/TID */ 1152 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1153 1154 /* 1155 * If we have timed-out TIDs - schedule the worker that will 1156 * reconfig the queues and update them 1157 * 1158 * Note that the no lock is taken here in order to not serialize 1159 * the TX flow. This isn't dangerous because scheduling 1160 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1161 * schedule it due to some race condition then next TX we get 1162 * here we will. 1163 */ 1164 if (unlikely(mvm->queue_info[txq_id].status == 1165 IWL_MVM_QUEUE_SHARED && 1166 iwl_mvm_txq_should_update(mvm, txq_id))) 1167 schedule_work(&mvm->add_stream_wk); 1168 } 1169 1170 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1171 mvmsta->sta_id, tid, txq_id, 1172 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1173 1174 /* From now on, we cannot access info->control */ 1175 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1176 1177 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1178 goto drop_unlock_sta; 1179 1180 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1181 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1182 1183 spin_unlock(&mvmsta->lock); 1184 1185 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1186 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1187 goto drop; 1188 1189 return 0; 1190 1191 drop_unlock_sta: 1192 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1193 spin_unlock(&mvmsta->lock); 1194 drop: 1195 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid); 1196 return -1; 1197 } 1198 1199 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1200 struct ieee80211_sta *sta) 1201 { 1202 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1203 struct ieee80211_tx_info info; 1204 struct sk_buff_head mpdus_skbs; 1205 unsigned int payload_len; 1206 int ret; 1207 1208 if (WARN_ON_ONCE(!mvmsta)) 1209 return -1; 1210 1211 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1212 return -1; 1213 1214 memcpy(&info, skb->cb, sizeof(info)); 1215 1216 if (!skb_is_gso(skb)) 1217 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1218 1219 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1220 tcp_hdrlen(skb) + skb->data_len; 1221 1222 if (payload_len <= skb_shinfo(skb)->gso_size) 1223 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1224 1225 __skb_queue_head_init(&mpdus_skbs); 1226 1227 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1228 if (ret) 1229 return ret; 1230 1231 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1232 return ret; 1233 1234 while (!skb_queue_empty(&mpdus_skbs)) { 1235 skb = __skb_dequeue(&mpdus_skbs); 1236 1237 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1238 if (ret) { 1239 __skb_queue_purge(&mpdus_skbs); 1240 return ret; 1241 } 1242 } 1243 1244 return 0; 1245 } 1246 1247 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1248 struct ieee80211_sta *sta, u8 tid) 1249 { 1250 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1251 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1252 struct ieee80211_vif *vif = mvmsta->vif; 1253 u16 normalized_ssn; 1254 1255 lockdep_assert_held(&mvmsta->lock); 1256 1257 if ((tid_data->state == IWL_AGG_ON || 1258 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1259 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1260 /* 1261 * Now that this aggregation or DQA queue is empty tell 1262 * mac80211 so it knows we no longer have frames buffered for 1263 * the station on this TID (for the TIM bitmap calculation.) 1264 */ 1265 ieee80211_sta_set_buffered(sta, tid, false); 1266 } 1267 1268 /* 1269 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1270 * to align the wrap around of ssn so we compare relevant values. 1271 */ 1272 normalized_ssn = tid_data->ssn; 1273 if (mvm->trans->trans_cfg->gen2) 1274 normalized_ssn &= 0xff; 1275 1276 if (normalized_ssn != tid_data->next_reclaimed) 1277 return; 1278 1279 switch (tid_data->state) { 1280 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1281 IWL_DEBUG_TX_QUEUES(mvm, 1282 "Can continue addBA flow ssn = next_recl = %d\n", 1283 tid_data->next_reclaimed); 1284 tid_data->state = IWL_AGG_STARTING; 1285 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1286 break; 1287 1288 case IWL_EMPTYING_HW_QUEUE_DELBA: 1289 IWL_DEBUG_TX_QUEUES(mvm, 1290 "Can continue DELBA flow ssn = next_recl = %d\n", 1291 tid_data->next_reclaimed); 1292 tid_data->state = IWL_AGG_OFF; 1293 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1294 break; 1295 1296 default: 1297 break; 1298 } 1299 } 1300 1301 #ifdef CONFIG_IWLWIFI_DEBUG 1302 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1303 { 1304 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1305 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1306 1307 switch (status & TX_STATUS_MSK) { 1308 case TX_STATUS_SUCCESS: 1309 return "SUCCESS"; 1310 TX_STATUS_POSTPONE(DELAY); 1311 TX_STATUS_POSTPONE(FEW_BYTES); 1312 TX_STATUS_POSTPONE(BT_PRIO); 1313 TX_STATUS_POSTPONE(QUIET_PERIOD); 1314 TX_STATUS_POSTPONE(CALC_TTAK); 1315 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1316 TX_STATUS_FAIL(SHORT_LIMIT); 1317 TX_STATUS_FAIL(LONG_LIMIT); 1318 TX_STATUS_FAIL(UNDERRUN); 1319 TX_STATUS_FAIL(DRAIN_FLOW); 1320 TX_STATUS_FAIL(RFKILL_FLUSH); 1321 TX_STATUS_FAIL(LIFE_EXPIRE); 1322 TX_STATUS_FAIL(DEST_PS); 1323 TX_STATUS_FAIL(HOST_ABORTED); 1324 TX_STATUS_FAIL(BT_RETRY); 1325 TX_STATUS_FAIL(STA_INVALID); 1326 TX_STATUS_FAIL(FRAG_DROPPED); 1327 TX_STATUS_FAIL(TID_DISABLE); 1328 TX_STATUS_FAIL(FIFO_FLUSHED); 1329 TX_STATUS_FAIL(SMALL_CF_POLL); 1330 TX_STATUS_FAIL(FW_DROP); 1331 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1332 } 1333 1334 return "UNKNOWN"; 1335 1336 #undef TX_STATUS_FAIL 1337 #undef TX_STATUS_POSTPONE 1338 } 1339 #endif /* CONFIG_IWLWIFI_DEBUG */ 1340 1341 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1342 enum nl80211_band band, 1343 struct ieee80211_tx_rate *r) 1344 { 1345 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1346 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1347 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1348 case RATE_MCS_CHAN_WIDTH_20: 1349 break; 1350 case RATE_MCS_CHAN_WIDTH_40: 1351 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1352 break; 1353 case RATE_MCS_CHAN_WIDTH_80: 1354 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1355 break; 1356 case RATE_MCS_CHAN_WIDTH_160: 1357 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1358 break; 1359 } 1360 if (rate_n_flags & RATE_MCS_SGI_MSK) 1361 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1362 if (rate_n_flags & RATE_MCS_HT_MSK) { 1363 r->flags |= IEEE80211_TX_RC_MCS; 1364 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1365 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1366 ieee80211_rate_set_vht( 1367 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1368 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1369 RATE_VHT_MCS_NSS_POS) + 1); 1370 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1371 } else { 1372 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1373 band); 1374 } 1375 } 1376 1377 /** 1378 * translate ucode response to mac80211 tx status control values 1379 */ 1380 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1381 struct ieee80211_tx_info *info) 1382 { 1383 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1384 1385 info->status.antenna = 1386 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1387 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1388 } 1389 1390 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1391 u32 status) 1392 { 1393 struct iwl_fw_dbg_trigger_tlv *trig; 1394 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1395 int i; 1396 1397 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1398 FW_DBG_TRIGGER_TX_STATUS); 1399 if (!trig) 1400 return; 1401 1402 status_trig = (void *)trig->data; 1403 1404 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1405 /* don't collect on status 0 */ 1406 if (!status_trig->statuses[i].status) 1407 break; 1408 1409 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1410 continue; 1411 1412 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1413 "Tx status %d was received", 1414 status & TX_STATUS_MSK); 1415 break; 1416 } 1417 } 1418 1419 /** 1420 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1421 * @tx_resp: the Tx response from the fw (agg or non-agg) 1422 * 1423 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1424 * it can't know that everything will go well until the end of the AMPDU, it 1425 * can't know in advance the number of MPDUs that will be sent in the current 1426 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1427 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1428 * of the batch. This is why the SSN of the SCD is written at the end of the 1429 * whole struct at a variable offset. This function knows how to cope with the 1430 * variable offset and returns the SSN of the SCD. 1431 */ 1432 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1433 struct iwl_mvm_tx_resp *tx_resp) 1434 { 1435 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1436 tx_resp->frame_count) & 0xfff; 1437 } 1438 1439 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1440 struct iwl_rx_packet *pkt) 1441 { 1442 struct ieee80211_sta *sta; 1443 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1444 int txq_id = SEQ_TO_QUEUE(sequence); 1445 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1446 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1447 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1448 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1449 struct agg_tx_status *agg_status = 1450 iwl_mvm_get_agg_status(mvm, tx_resp); 1451 u32 status = le16_to_cpu(agg_status->status); 1452 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1453 struct sk_buff_head skbs; 1454 u8 skb_freed = 0; 1455 u8 lq_color; 1456 u16 next_reclaimed, seq_ctl; 1457 bool is_ndp = false; 1458 1459 __skb_queue_head_init(&skbs); 1460 1461 if (iwl_mvm_has_new_tx_api(mvm)) 1462 txq_id = le16_to_cpu(tx_resp->tx_queue); 1463 1464 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1465 1466 /* we can free until ssn % q.n_bd not inclusive */ 1467 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1468 1469 while (!skb_queue_empty(&skbs)) { 1470 struct sk_buff *skb = __skb_dequeue(&skbs); 1471 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1472 struct ieee80211_hdr *hdr = (void *)skb->data; 1473 bool flushed = false; 1474 1475 skb_freed++; 1476 1477 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1478 1479 memset(&info->status, 0, sizeof(info->status)); 1480 1481 /* inform mac80211 about what happened with the frame */ 1482 switch (status & TX_STATUS_MSK) { 1483 case TX_STATUS_SUCCESS: 1484 case TX_STATUS_DIRECT_DONE: 1485 info->flags |= IEEE80211_TX_STAT_ACK; 1486 break; 1487 case TX_STATUS_FAIL_FIFO_FLUSHED: 1488 case TX_STATUS_FAIL_DRAIN_FLOW: 1489 flushed = true; 1490 break; 1491 case TX_STATUS_FAIL_DEST_PS: 1492 /* the FW should have stopped the queue and not 1493 * return this status 1494 */ 1495 WARN_ON(1); 1496 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1497 break; 1498 default: 1499 break; 1500 } 1501 1502 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1503 ieee80211_is_mgmt(hdr->frame_control)) 1504 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1505 1506 /* 1507 * If we are freeing multiple frames, mark all the frames 1508 * but the first one as acked, since they were acknowledged 1509 * before 1510 * */ 1511 if (skb_freed > 1) 1512 info->flags |= IEEE80211_TX_STAT_ACK; 1513 1514 iwl_mvm_tx_status_check_trigger(mvm, status); 1515 1516 info->status.rates[0].count = tx_resp->failure_frame + 1; 1517 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1518 info); 1519 info->status.status_driver_data[1] = 1520 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1521 1522 /* Single frame failure in an AMPDU queue => send BAR */ 1523 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1524 !(info->flags & IEEE80211_TX_STAT_ACK) && 1525 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1526 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1527 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1528 1529 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1530 if (ieee80211_is_back_req(hdr->frame_control)) 1531 seq_ctl = 0; 1532 else if (status != TX_STATUS_SUCCESS) 1533 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1534 1535 if (unlikely(!seq_ctl)) { 1536 struct ieee80211_hdr *hdr = (void *)skb->data; 1537 1538 /* 1539 * If it is an NDP, we can't update next_reclaim since 1540 * its sequence control is 0. Note that for that same 1541 * reason, NDPs are never sent to A-MPDU'able queues 1542 * so that we can never have more than one freed frame 1543 * for a single Tx resonse (see WARN_ON below). 1544 */ 1545 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1546 is_ndp = true; 1547 } 1548 1549 /* 1550 * TODO: this is not accurate if we are freeing more than one 1551 * packet. 1552 */ 1553 info->status.tx_time = 1554 le16_to_cpu(tx_resp->wireless_media_time); 1555 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1556 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1557 info->status.status_driver_data[0] = 1558 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1559 1560 ieee80211_tx_status(mvm->hw, skb); 1561 } 1562 1563 /* This is an aggregation queue or might become one, so we use 1564 * the ssn since: ssn = wifi seq_num % 256. 1565 * The seq_ctl is the sequence control of the packet to which 1566 * this Tx response relates. But if there is a hole in the 1567 * bitmap of the BA we received, this Tx response may allow to 1568 * reclaim the hole and all the subsequent packets that were 1569 * already acked. In that case, seq_ctl != ssn, and the next 1570 * packet to be reclaimed will be ssn and not seq_ctl. In that 1571 * case, several packets will be reclaimed even if 1572 * frame_count = 1. 1573 * 1574 * The ssn is the index (% 256) of the latest packet that has 1575 * treated (acked / dropped) + 1. 1576 */ 1577 next_reclaimed = ssn; 1578 1579 IWL_DEBUG_TX_REPLY(mvm, 1580 "TXQ %d status %s (0x%08x)\n", 1581 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1582 1583 IWL_DEBUG_TX_REPLY(mvm, 1584 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1585 le32_to_cpu(tx_resp->initial_rate), 1586 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1587 ssn, next_reclaimed, seq_ctl); 1588 1589 rcu_read_lock(); 1590 1591 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1592 /* 1593 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1594 * the firmware while we still have packets for it in the Tx queues. 1595 */ 1596 if (WARN_ON_ONCE(!sta)) 1597 goto out; 1598 1599 if (!IS_ERR(sta)) { 1600 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1601 1602 iwl_mvm_tx_airtime(mvm, mvmsta, 1603 le16_to_cpu(tx_resp->wireless_media_time)); 1604 1605 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1606 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1607 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1608 1609 if (sta->wme && tid != IWL_MGMT_TID) { 1610 struct iwl_mvm_tid_data *tid_data = 1611 &mvmsta->tid_data[tid]; 1612 bool send_eosp_ndp = false; 1613 1614 spin_lock_bh(&mvmsta->lock); 1615 1616 if (!is_ndp) { 1617 tid_data->next_reclaimed = next_reclaimed; 1618 IWL_DEBUG_TX_REPLY(mvm, 1619 "Next reclaimed packet:%d\n", 1620 next_reclaimed); 1621 } else { 1622 IWL_DEBUG_TX_REPLY(mvm, 1623 "NDP - don't update next_reclaimed\n"); 1624 } 1625 1626 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1627 1628 if (mvmsta->sleep_tx_count) { 1629 mvmsta->sleep_tx_count--; 1630 if (mvmsta->sleep_tx_count && 1631 !iwl_mvm_tid_queued(mvm, tid_data)) { 1632 /* 1633 * The number of frames in the queue 1634 * dropped to 0 even if we sent less 1635 * frames than we thought we had on the 1636 * Tx queue. 1637 * This means we had holes in the BA 1638 * window that we just filled, ask 1639 * mac80211 to send EOSP since the 1640 * firmware won't know how to do that. 1641 * Send NDP and the firmware will send 1642 * EOSP notification that will trigger 1643 * a call to ieee80211_sta_eosp(). 1644 */ 1645 send_eosp_ndp = true; 1646 } 1647 } 1648 1649 spin_unlock_bh(&mvmsta->lock); 1650 if (send_eosp_ndp) { 1651 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1652 IEEE80211_FRAME_RELEASE_UAPSD, 1653 1, tid, false, false); 1654 mvmsta->sleep_tx_count = 0; 1655 ieee80211_send_eosp_nullfunc(sta, tid); 1656 } 1657 } 1658 1659 if (mvmsta->next_status_eosp) { 1660 mvmsta->next_status_eosp = false; 1661 ieee80211_sta_eosp(sta); 1662 } 1663 } 1664 out: 1665 rcu_read_unlock(); 1666 } 1667 1668 #ifdef CONFIG_IWLWIFI_DEBUG 1669 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1670 static const char *iwl_get_agg_tx_status(u16 status) 1671 { 1672 switch (status & AGG_TX_STATE_STATUS_MSK) { 1673 AGG_TX_STATE_(TRANSMITTED); 1674 AGG_TX_STATE_(UNDERRUN); 1675 AGG_TX_STATE_(BT_PRIO); 1676 AGG_TX_STATE_(FEW_BYTES); 1677 AGG_TX_STATE_(ABORT); 1678 AGG_TX_STATE_(TX_ON_AIR_DROP); 1679 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1680 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1681 AGG_TX_STATE_(SCD_QUERY); 1682 AGG_TX_STATE_(TEST_BAD_CRC32); 1683 AGG_TX_STATE_(RESPONSE); 1684 AGG_TX_STATE_(DUMP_TX); 1685 AGG_TX_STATE_(DELAY_TX); 1686 } 1687 1688 return "UNKNOWN"; 1689 } 1690 1691 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1692 struct iwl_rx_packet *pkt) 1693 { 1694 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1695 struct agg_tx_status *frame_status = 1696 iwl_mvm_get_agg_status(mvm, tx_resp); 1697 int i; 1698 1699 for (i = 0; i < tx_resp->frame_count; i++) { 1700 u16 fstatus = le16_to_cpu(frame_status[i].status); 1701 1702 IWL_DEBUG_TX_REPLY(mvm, 1703 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1704 iwl_get_agg_tx_status(fstatus), 1705 fstatus & AGG_TX_STATE_STATUS_MSK, 1706 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1707 AGG_TX_STATE_TRY_CNT_POS, 1708 le16_to_cpu(frame_status[i].sequence)); 1709 } 1710 } 1711 #else 1712 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1713 struct iwl_rx_packet *pkt) 1714 {} 1715 #endif /* CONFIG_IWLWIFI_DEBUG */ 1716 1717 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1718 struct iwl_rx_packet *pkt) 1719 { 1720 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1721 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1722 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1723 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1724 struct iwl_mvm_sta *mvmsta; 1725 int queue = SEQ_TO_QUEUE(sequence); 1726 struct ieee80211_sta *sta; 1727 1728 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1729 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1730 return; 1731 1732 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1733 1734 rcu_read_lock(); 1735 1736 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1737 1738 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1739 if (WARN_ON_ONCE(!sta || !sta->wme)) { 1740 rcu_read_unlock(); 1741 return; 1742 } 1743 1744 if (!WARN_ON_ONCE(!mvmsta)) { 1745 mvmsta->tid_data[tid].rate_n_flags = 1746 le32_to_cpu(tx_resp->initial_rate); 1747 mvmsta->tid_data[tid].tx_time = 1748 le16_to_cpu(tx_resp->wireless_media_time); 1749 mvmsta->tid_data[tid].lq_color = 1750 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1751 iwl_mvm_tx_airtime(mvm, mvmsta, 1752 le16_to_cpu(tx_resp->wireless_media_time)); 1753 } 1754 1755 rcu_read_unlock(); 1756 } 1757 1758 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1759 { 1760 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1761 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1762 1763 if (tx_resp->frame_count == 1) 1764 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1765 else 1766 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1767 } 1768 1769 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1770 int txq, int index, 1771 struct ieee80211_tx_info *ba_info, u32 rate) 1772 { 1773 struct sk_buff_head reclaimed_skbs; 1774 struct iwl_mvm_tid_data *tid_data; 1775 struct ieee80211_sta *sta; 1776 struct iwl_mvm_sta *mvmsta; 1777 struct sk_buff *skb; 1778 int freed; 1779 1780 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1781 tid > IWL_MAX_TID_COUNT, 1782 "sta_id %d tid %d", sta_id, tid)) 1783 return; 1784 1785 rcu_read_lock(); 1786 1787 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1788 1789 /* Reclaiming frames for a station that has been deleted ? */ 1790 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1791 rcu_read_unlock(); 1792 return; 1793 } 1794 1795 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1796 tid_data = &mvmsta->tid_data[tid]; 1797 1798 if (tid_data->txq_id != txq) { 1799 IWL_ERR(mvm, 1800 "invalid BA notification: Q %d, tid %d\n", 1801 tid_data->txq_id, tid); 1802 rcu_read_unlock(); 1803 return; 1804 } 1805 1806 __skb_queue_head_init(&reclaimed_skbs); 1807 1808 /* 1809 * Release all TFDs before the SSN, i.e. all TFDs in front of 1810 * block-ack window (we assume that they've been successfully 1811 * transmitted ... if not, it's too late anyway). 1812 */ 1813 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1814 1815 spin_lock_bh(&mvmsta->lock); 1816 1817 tid_data->next_reclaimed = index; 1818 1819 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1820 1821 freed = 0; 1822 1823 /* pack lq color from tid_data along the reduced txp */ 1824 ba_info->status.status_driver_data[0] = 1825 RS_DRV_DATA_PACK(tid_data->lq_color, 1826 ba_info->status.status_driver_data[0]); 1827 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1828 1829 skb_queue_walk(&reclaimed_skbs, skb) { 1830 struct ieee80211_hdr *hdr = (void *)skb->data; 1831 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1832 1833 if (ieee80211_is_data_qos(hdr->frame_control)) 1834 freed++; 1835 else 1836 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1837 1838 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1839 1840 memset(&info->status, 0, sizeof(info->status)); 1841 /* Packet was transmitted successfully, failures come as single 1842 * frames because before failing a frame the firmware transmits 1843 * it without aggregation at least once. 1844 */ 1845 info->flags |= IEEE80211_TX_STAT_ACK; 1846 1847 /* this is the first skb we deliver in this batch */ 1848 /* put the rate scaling data there */ 1849 if (freed == 1) { 1850 info->flags |= IEEE80211_TX_STAT_AMPDU; 1851 memcpy(&info->status, &ba_info->status, 1852 sizeof(ba_info->status)); 1853 iwl_mvm_hwrate_to_tx_status(rate, info); 1854 } 1855 } 1856 1857 spin_unlock_bh(&mvmsta->lock); 1858 1859 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1860 * possible (i.e. first MPDU in the aggregation wasn't acked) 1861 * Still it's important to update RS about sent vs. acked. 1862 */ 1863 if (skb_queue_empty(&reclaimed_skbs)) { 1864 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1865 1866 if (mvmsta->vif) 1867 chanctx_conf = 1868 rcu_dereference(mvmsta->vif->chanctx_conf); 1869 1870 if (WARN_ON_ONCE(!chanctx_conf)) 1871 goto out; 1872 1873 ba_info->band = chanctx_conf->def.chan->band; 1874 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1875 1876 if (!iwl_mvm_has_tlc_offload(mvm)) { 1877 IWL_DEBUG_TX_REPLY(mvm, 1878 "No reclaim. Update rs directly\n"); 1879 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1880 } 1881 } 1882 1883 out: 1884 rcu_read_unlock(); 1885 1886 while (!skb_queue_empty(&reclaimed_skbs)) { 1887 skb = __skb_dequeue(&reclaimed_skbs); 1888 ieee80211_tx_status(mvm->hw, skb); 1889 } 1890 } 1891 1892 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1893 { 1894 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1895 int sta_id, tid, txq, index; 1896 struct ieee80211_tx_info ba_info = {}; 1897 struct iwl_mvm_ba_notif *ba_notif; 1898 struct iwl_mvm_tid_data *tid_data; 1899 struct iwl_mvm_sta *mvmsta; 1900 1901 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1902 1903 if (iwl_mvm_has_new_tx_api(mvm)) { 1904 struct iwl_mvm_compressed_ba_notif *ba_res = 1905 (void *)pkt->data; 1906 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 1907 int i; 1908 1909 sta_id = ba_res->sta_id; 1910 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1911 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1912 ba_info.status.tx_time = 1913 (u16)le32_to_cpu(ba_res->wireless_time); 1914 ba_info.status.status_driver_data[0] = 1915 (void *)(uintptr_t)ba_res->reduced_txp; 1916 1917 if (!le16_to_cpu(ba_res->tfd_cnt)) 1918 goto out; 1919 1920 rcu_read_lock(); 1921 1922 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1923 if (!mvmsta) 1924 goto out_unlock; 1925 1926 /* Free per TID */ 1927 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { 1928 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1929 &ba_res->tfd[i]; 1930 1931 tid = ba_tfd->tid; 1932 if (tid == IWL_MGMT_TID) 1933 tid = IWL_MAX_TID_COUNT; 1934 1935 mvmsta->tid_data[i].lq_color = lq_color; 1936 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 1937 (int)(le16_to_cpu(ba_tfd->q_num)), 1938 le16_to_cpu(ba_tfd->tfd_index), 1939 &ba_info, 1940 le32_to_cpu(ba_res->tx_rate)); 1941 } 1942 1943 iwl_mvm_tx_airtime(mvm, mvmsta, 1944 le32_to_cpu(ba_res->wireless_time)); 1945 out_unlock: 1946 rcu_read_unlock(); 1947 out: 1948 IWL_DEBUG_TX_REPLY(mvm, 1949 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1950 sta_id, le32_to_cpu(ba_res->flags), 1951 le16_to_cpu(ba_res->txed), 1952 le16_to_cpu(ba_res->done)); 1953 return; 1954 } 1955 1956 ba_notif = (void *)pkt->data; 1957 sta_id = ba_notif->sta_id; 1958 tid = ba_notif->tid; 1959 /* "flow" corresponds to Tx queue */ 1960 txq = le16_to_cpu(ba_notif->scd_flow); 1961 /* "ssn" is start of block-ack Tx window, corresponds to index 1962 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1963 index = le16_to_cpu(ba_notif->scd_ssn); 1964 1965 rcu_read_lock(); 1966 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1967 if (WARN_ON_ONCE(!mvmsta)) { 1968 rcu_read_unlock(); 1969 return; 1970 } 1971 1972 tid_data = &mvmsta->tid_data[tid]; 1973 1974 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1975 ba_info.status.ampdu_len = ba_notif->txed; 1976 ba_info.status.tx_time = tid_data->tx_time; 1977 ba_info.status.status_driver_data[0] = 1978 (void *)(uintptr_t)ba_notif->reduced_txp; 1979 1980 rcu_read_unlock(); 1981 1982 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1983 tid_data->rate_n_flags); 1984 1985 IWL_DEBUG_TX_REPLY(mvm, 1986 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1987 ba_notif->sta_addr, ba_notif->sta_id); 1988 1989 IWL_DEBUG_TX_REPLY(mvm, 1990 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1991 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1992 le64_to_cpu(ba_notif->bitmap), txq, index, 1993 ba_notif->txed, ba_notif->txed_2_done); 1994 1995 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1996 ba_notif->reduced_txp); 1997 } 1998 1999 /* 2000 * Note that there are transports that buffer frames before they reach 2001 * the firmware. This means that after flush_tx_path is called, the 2002 * queue might not be empty. The race-free way to handle this is to: 2003 * 1) set the station as draining 2004 * 2) flush the Tx path 2005 * 3) wait for the transport queues to be empty 2006 */ 2007 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 2008 { 2009 int ret; 2010 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2011 .queues_ctl = cpu_to_le32(tfd_msk), 2012 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2013 }; 2014 2015 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2016 2017 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2018 sizeof(flush_cmd), &flush_cmd); 2019 if (ret) 2020 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2021 return ret; 2022 } 2023 2024 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, 2025 u16 tids, u32 flags) 2026 { 2027 int ret; 2028 struct iwl_tx_path_flush_cmd flush_cmd = { 2029 .sta_id = cpu_to_le32(sta_id), 2030 .tid_mask = cpu_to_le16(tids), 2031 }; 2032 2033 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2034 2035 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2036 sizeof(flush_cmd), &flush_cmd); 2037 if (ret) 2038 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2039 return ret; 2040 } 2041 2042 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags) 2043 { 2044 struct iwl_mvm_int_sta *int_sta = sta; 2045 struct iwl_mvm_sta *mvm_sta = sta; 2046 2047 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != 2048 offsetof(struct iwl_mvm_sta, sta_id)); 2049 2050 if (iwl_mvm_has_new_tx_api(mvm)) 2051 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 2052 0xffff, flags); 2053 2054 if (internal) 2055 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 2056 flags); 2057 2058 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags); 2059 } 2060