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 75static void 76iwl_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 99static 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 193out: 194#endif 195 return offload_assist; 196} 197 198/* 199 * Sets most of the Tx cmd's fields 200 */ 201void 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 307static 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 324static 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 364static 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 */ 375void 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 416static 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 */ 436static 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 */ 493static struct iwl_device_tx_cmd * 494iwl_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 and mgmt packets rate info comes from the fw. Only 536 * set rate/antenna for injected frames with fixed rate, or 537 * when no sta is given. 538 */ 539 if (unlikely(!sta || 540 info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) { 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 } else if (!ieee80211_is_data(hdr->frame_control) || 546 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 547 /* These are important frames */ 548 flags |= IWL_TX_FLAGS_HIGH_PRI; 549 } 550 551 if (mvm->trans->trans_cfg->device_family >= 552 IWL_DEVICE_FAMILY_AX210) { 553 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 554 555 cmd->offload_assist |= cpu_to_le32(offload_assist); 556 557 /* Total # bytes to be transmitted */ 558 cmd->len = cpu_to_le16((u16)skb->len); 559 560 /* Copy MAC header from skb into command buffer */ 561 memcpy(cmd->hdr, hdr, hdrlen); 562 563 cmd->flags = cpu_to_le16(flags); 564 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 565 } else { 566 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 567 568 cmd->offload_assist |= cpu_to_le16(offload_assist); 569 570 /* Total # bytes to be transmitted */ 571 cmd->len = cpu_to_le16((u16)skb->len); 572 573 /* Copy MAC header from skb into command buffer */ 574 memcpy(cmd->hdr, hdr, hdrlen); 575 576 cmd->flags = cpu_to_le32(flags); 577 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 578 } 579 goto out; 580 } 581 582 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 583 584 if (info->control.hw_key) 585 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 586 587 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 588 589 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 590 591 /* Copy MAC header from skb into command buffer */ 592 memcpy(tx_cmd->hdr, hdr, hdrlen); 593 594out: 595 return dev_cmd; 596} 597 598static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 599 struct iwl_device_tx_cmd *cmd) 600{ 601 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 602 603 memset(&skb_info->status, 0, sizeof(skb_info->status)); 604 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 605 606 skb_info->driver_data[1] = cmd; 607} 608 609static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 610 struct ieee80211_tx_info *info, 611 struct ieee80211_hdr *hdr) 612{ 613 struct iwl_mvm_vif *mvmvif = 614 iwl_mvm_vif_from_mac80211(info->control.vif); 615 __le16 fc = hdr->frame_control; 616 617 switch (info->control.vif->type) { 618 case NL80211_IFTYPE_AP: 619 case NL80211_IFTYPE_ADHOC: 620 /* 621 * Non-bufferable frames use the broadcast station, thus they 622 * use the probe queue. 623 * Also take care of the case where we send a deauth to a 624 * station that we don't have, or similarly an association 625 * response (with non-success status) for a station we can't 626 * accept. 627 * Also, disassociate frames might happen, particular with 628 * reason 7 ("Class 3 frame received from nonassociated STA"). 629 */ 630 if (ieee80211_is_mgmt(fc) && 631 (!ieee80211_is_bufferable_mmpdu(fc) || 632 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 633 return mvm->probe_queue; 634 635 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 636 is_multicast_ether_addr(hdr->addr1)) 637 return mvmvif->cab_queue; 638 639 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 640 "fc=0x%02x", le16_to_cpu(fc)); 641 return mvm->probe_queue; 642 case NL80211_IFTYPE_P2P_DEVICE: 643 if (ieee80211_is_mgmt(fc)) 644 return mvm->p2p_dev_queue; 645 646 WARN_ON_ONCE(1); 647 return mvm->p2p_dev_queue; 648 default: 649 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 650 return -1; 651 } 652} 653 654static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 655 struct sk_buff *skb) 656{ 657 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 658 struct iwl_mvm_vif *mvmvif = 659 iwl_mvm_vif_from_mac80211(info->control.vif); 660 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 661 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 662 struct iwl_probe_resp_data *resp_data; 663 u8 *ie, *pos; 664 u8 match[] = { 665 (WLAN_OUI_WFA >> 16) & 0xff, 666 (WLAN_OUI_WFA >> 8) & 0xff, 667 WLAN_OUI_WFA & 0xff, 668 WLAN_OUI_TYPE_WFA_P2P, 669 }; 670 671 rcu_read_lock(); 672 673 resp_data = rcu_dereference(mvmvif->probe_resp_data); 674 if (!resp_data) 675 goto out; 676 677 if (!resp_data->notif.noa_active) 678 goto out; 679 680 ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 681 mgmt->u.probe_resp.variable, 682 skb->len - base_len, 683 match, 4, 2); 684 if (!ie) { 685 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 686 goto out; 687 } 688 689 if (skb_tailroom(skb) < resp_data->noa_len) { 690 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 691 IWL_ERR(mvm, 692 "Failed to reallocate probe resp\n"); 693 goto out; 694 } 695 } 696 697 pos = skb_put(skb, resp_data->noa_len); 698 699 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 700 /* Set length of IE body (not including ID and length itself) */ 701 *pos++ = resp_data->noa_len - 2; 702 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 703 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 704 *pos++ = WLAN_OUI_WFA & 0xff; 705 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 706 707 memcpy(pos, &resp_data->notif.noa_attr, 708 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 709 710out: 711 rcu_read_unlock(); 712} 713 714int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 715{ 716 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 717 struct ieee80211_tx_info info; 718 struct iwl_device_tx_cmd *dev_cmd; 719 u8 sta_id; 720 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 721 __le16 fc = hdr->frame_control; 722 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 723 IEEE80211_TX_CTL_TX_OFFCHAN; 724 int queue = -1; 725 726 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 727 return -1; 728 729 memcpy(&info, skb->cb, sizeof(info)); 730 731 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 732 return -1; 733 734 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 735 return -1; 736 737 if (info.control.vif) { 738 struct iwl_mvm_vif *mvmvif = 739 iwl_mvm_vif_from_mac80211(info.control.vif); 740 741 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 742 info.control.vif->type == NL80211_IFTYPE_AP || 743 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 744 if (!ieee80211_is_data(hdr->frame_control)) 745 sta_id = mvmvif->bcast_sta.sta_id; 746 else 747 sta_id = mvmvif->mcast_sta.sta_id; 748 749 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr); 750 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 751 queue = mvm->snif_queue; 752 sta_id = mvm->snif_sta.sta_id; 753 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 754 offchannel) { 755 /* 756 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 757 * that can be used in 2 different types of vifs, P2P & 758 * STATION. 759 * P2P uses the offchannel queue. 760 * STATION (HS2.0) uses the auxiliary context of the FW, 761 * and hence needs to be sent on the aux queue. 762 */ 763 sta_id = mvm->aux_sta.sta_id; 764 queue = mvm->aux_queue; 765 } 766 } 767 768 if (queue < 0) { 769 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 770 return -1; 771 } 772 773 if (unlikely(ieee80211_is_probe_resp(fc))) 774 iwl_mvm_probe_resp_set_noa(mvm, skb); 775 776 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 777 778 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 779 if (!dev_cmd) 780 return -1; 781 782 /* From now on, we cannot access info->control */ 783 iwl_mvm_skb_prepare_status(skb, dev_cmd); 784 785 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 786 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 787 return -1; 788 } 789 790 return 0; 791} 792 793unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 794 struct ieee80211_sta *sta, unsigned int tid) 795{ 796 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 797 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band; 798 u8 ac = tid_to_mac80211_ac[tid]; 799 unsigned int txf; 800 int lmac = iwl_mvm_get_lmac_id(mvm->fw, band); 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 820static int 821iwl_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 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6; 841 if (WARN_ON_ONCE(IS_ERR(next))) 842 return -EINVAL; 843 else if (next) 844 consume_skb(skb); 845 846 skb_list_walk_safe(next, tmp, next) { 847 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 848 /* 849 * Compute the length of all the data added for the A-MSDU. 850 * This will be used to compute the length to write in the TX 851 * command. We have: SNAP + IP + TCP for n -1 subframes and 852 * ETH header for n subframes. 853 */ 854 tcp_payload_len = skb_tail_pointer(tmp) - 855 skb_transport_header(tmp) - 856 tcp_hdrlen(tmp) + tmp->data_len; 857 858 if (ipv4) 859 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 860 861 if (tcp_payload_len > mss) { 862 skb_shinfo(tmp)->gso_size = mss; 863 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 : 864 SKB_GSO_TCPV6; 865 } else { 866 if (qos) { 867 u8 *qc; 868 869 if (ipv4) 870 ip_send_check(ip_hdr(tmp)); 871 872 qc = ieee80211_get_qos_ctl((void *)tmp->data); 873 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 874 } 875 skb_shinfo(tmp)->gso_size = 0; 876 } 877 878 skb_mark_not_on_list(tmp); 879 __skb_queue_tail(mpdus_skb, tmp); 880 i++; 881 } 882 883 return 0; 884} 885 886static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 887 struct ieee80211_tx_info *info, 888 struct ieee80211_sta *sta, 889 struct sk_buff_head *mpdus_skb) 890{ 891 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 892 struct ieee80211_hdr *hdr = (void *)skb->data; 893 unsigned int mss = skb_shinfo(skb)->gso_size; 894 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 895 u16 snap_ip_tcp, pad; 896 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 897 u8 tid; 898 899 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 900 tcp_hdrlen(skb); 901 902 if (!mvmsta->max_amsdu_len || 903 !ieee80211_is_data_qos(hdr->frame_control) || 904 !mvmsta->amsdu_enabled) 905 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 906 907 /* 908 * Do not build AMSDU for IPv6 with extension headers. 909 * ask stack to segment and checkum the generated MPDUs for us. 910 */ 911 if (skb->protocol == htons(ETH_P_IPV6) && 912 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 913 IPPROTO_TCP) { 914 netdev_flags &= ~NETIF_F_CSUM_MASK; 915 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 916 } 917 918 tid = ieee80211_get_tid(hdr); 919 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 920 return -EINVAL; 921 922 /* 923 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 924 * during an BA session. 925 */ 926 if ((info->flags & IEEE80211_TX_CTL_AMPDU && 927 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) || 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 */ 991static 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 */ 1004static 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 1022static 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 1043static 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 */ 1065static 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_any_nullfunc(fc)) && sta->he_cap.has_he) 1093 return -1; 1094 1095 if (unlikely(ieee80211_is_probe_resp(fc))) 1096 iwl_mvm_probe_resp_set_noa(mvm, skb); 1097 1098 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1099 sta, mvmsta->sta_id); 1100 if (!dev_cmd) 1101 goto drop; 1102 1103 /* 1104 * we handle that entirely ourselves -- for uAPSD the firmware 1105 * will always send a notification, and for PS-Poll responses 1106 * we'll notify mac80211 when getting frame status 1107 */ 1108 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1109 1110 spin_lock(&mvmsta->lock); 1111 1112 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1113 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 1114 * assignment of MGMT TID 1115 */ 1116 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1117 tid = ieee80211_get_tid(hdr); 1118 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1119 goto drop_unlock_sta; 1120 1121 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1122 if (WARN_ONCE(is_ampdu && 1123 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1124 "Invalid internal agg state %d for TID %d", 1125 mvmsta->tid_data[tid].state, tid)) 1126 goto drop_unlock_sta; 1127 1128 seq_number = mvmsta->tid_data[tid].seq_number; 1129 seq_number &= IEEE80211_SCTL_SEQ; 1130 1131 if (!iwl_mvm_has_new_tx_api(mvm)) { 1132 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1133 1134 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1135 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1136 /* update the tx_cmd hdr as it was already copied */ 1137 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1138 } 1139 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) { 1140 tid = IWL_TID_NON_QOS; 1141 } 1142 1143 txq_id = mvmsta->tid_data[tid].txq_id; 1144 1145 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1146 1147 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1148 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1149 spin_unlock(&mvmsta->lock); 1150 return -1; 1151 } 1152 1153 if (!iwl_mvm_has_new_tx_api(mvm)) { 1154 /* Keep track of the time of the last frame for this RA/TID */ 1155 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1156 1157 /* 1158 * If we have timed-out TIDs - schedule the worker that will 1159 * reconfig the queues and update them 1160 * 1161 * Note that the no lock is taken here in order to not serialize 1162 * the TX flow. This isn't dangerous because scheduling 1163 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1164 * schedule it due to some race condition then next TX we get 1165 * here we will. 1166 */ 1167 if (unlikely(mvm->queue_info[txq_id].status == 1168 IWL_MVM_QUEUE_SHARED && 1169 iwl_mvm_txq_should_update(mvm, txq_id))) 1170 schedule_work(&mvm->add_stream_wk); 1171 } 1172 1173 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1174 mvmsta->sta_id, tid, txq_id, 1175 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1176 1177 /* From now on, we cannot access info->control */ 1178 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1179 1180 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1181 goto drop_unlock_sta; 1182 1183 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1184 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1185 1186 spin_unlock(&mvmsta->lock); 1187 1188 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1189 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1190 goto drop; 1191 1192 return 0; 1193 1194drop_unlock_sta: 1195 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1196 spin_unlock(&mvmsta->lock); 1197drop: 1198 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid); 1199 return -1; 1200} 1201 1202int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, 1203 struct ieee80211_sta *sta) 1204{ 1205 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1206 struct ieee80211_tx_info info; 1207 struct sk_buff_head mpdus_skbs; 1208 unsigned int payload_len; 1209 int ret; 1210 struct sk_buff *orig_skb = skb; 1211 1212 if (WARN_ON_ONCE(!mvmsta)) 1213 return -1; 1214 1215 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1216 return -1; 1217 1218 memcpy(&info, skb->cb, sizeof(info)); 1219 1220 if (!skb_is_gso(skb)) 1221 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1222 1223 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1224 tcp_hdrlen(skb) + skb->data_len; 1225 1226 if (payload_len <= skb_shinfo(skb)->gso_size) 1227 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1228 1229 __skb_queue_head_init(&mpdus_skbs); 1230 1231 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1232 if (ret) 1233 return ret; 1234 1235 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1236 return ret; 1237 1238 while (!skb_queue_empty(&mpdus_skbs)) { 1239 skb = __skb_dequeue(&mpdus_skbs); 1240 1241 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1242 if (ret) { 1243 /* Free skbs created as part of TSO logic that have not yet been dequeued */ 1244 __skb_queue_purge(&mpdus_skbs); 1245 /* skb here is not necessarily same as skb that entered this method, 1246 * so free it explicitly. 1247 */ 1248 if (skb == orig_skb) 1249 ieee80211_free_txskb(mvm->hw, skb); 1250 else 1251 kfree_skb(skb); 1252 /* there was error, but we consumed skb one way or another, so return 0 */ 1253 return 0; 1254 } 1255 } 1256 1257 return 0; 1258} 1259 1260static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1261 struct ieee80211_sta *sta, u8 tid) 1262{ 1263 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1264 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1265 struct ieee80211_vif *vif = mvmsta->vif; 1266 u16 normalized_ssn; 1267 1268 lockdep_assert_held(&mvmsta->lock); 1269 1270 if ((tid_data->state == IWL_AGG_ON || 1271 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1272 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1273 /* 1274 * Now that this aggregation or DQA queue is empty tell 1275 * mac80211 so it knows we no longer have frames buffered for 1276 * the station on this TID (for the TIM bitmap calculation.) 1277 */ 1278 ieee80211_sta_set_buffered(sta, tid, false); 1279 } 1280 1281 /* 1282 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1283 * to align the wrap around of ssn so we compare relevant values. 1284 */ 1285 normalized_ssn = tid_data->ssn; 1286 if (mvm->trans->trans_cfg->gen2) 1287 normalized_ssn &= 0xff; 1288 1289 if (normalized_ssn != tid_data->next_reclaimed) 1290 return; 1291 1292 switch (tid_data->state) { 1293 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1294 IWL_DEBUG_TX_QUEUES(mvm, 1295 "Can continue addBA flow ssn = next_recl = %d\n", 1296 tid_data->next_reclaimed); 1297 tid_data->state = IWL_AGG_STARTING; 1298 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1299 break; 1300 1301 case IWL_EMPTYING_HW_QUEUE_DELBA: 1302 IWL_DEBUG_TX_QUEUES(mvm, 1303 "Can continue DELBA flow ssn = next_recl = %d\n", 1304 tid_data->next_reclaimed); 1305 tid_data->state = IWL_AGG_OFF; 1306 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1307 break; 1308 1309 default: 1310 break; 1311 } 1312} 1313 1314#ifdef CONFIG_IWLWIFI_DEBUG 1315const char *iwl_mvm_get_tx_fail_reason(u32 status) 1316{ 1317#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1318#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1319 1320 switch (status & TX_STATUS_MSK) { 1321 case TX_STATUS_SUCCESS: 1322 return "SUCCESS"; 1323 TX_STATUS_POSTPONE(DELAY); 1324 TX_STATUS_POSTPONE(FEW_BYTES); 1325 TX_STATUS_POSTPONE(BT_PRIO); 1326 TX_STATUS_POSTPONE(QUIET_PERIOD); 1327 TX_STATUS_POSTPONE(CALC_TTAK); 1328 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1329 TX_STATUS_FAIL(SHORT_LIMIT); 1330 TX_STATUS_FAIL(LONG_LIMIT); 1331 TX_STATUS_FAIL(UNDERRUN); 1332 TX_STATUS_FAIL(DRAIN_FLOW); 1333 TX_STATUS_FAIL(RFKILL_FLUSH); 1334 TX_STATUS_FAIL(LIFE_EXPIRE); 1335 TX_STATUS_FAIL(DEST_PS); 1336 TX_STATUS_FAIL(HOST_ABORTED); 1337 TX_STATUS_FAIL(BT_RETRY); 1338 TX_STATUS_FAIL(STA_INVALID); 1339 TX_STATUS_FAIL(FRAG_DROPPED); 1340 TX_STATUS_FAIL(TID_DISABLE); 1341 TX_STATUS_FAIL(FIFO_FLUSHED); 1342 TX_STATUS_FAIL(SMALL_CF_POLL); 1343 TX_STATUS_FAIL(FW_DROP); 1344 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1345 } 1346 1347 return "UNKNOWN"; 1348 1349#undef TX_STATUS_FAIL 1350#undef TX_STATUS_POSTPONE 1351} 1352#endif /* CONFIG_IWLWIFI_DEBUG */ 1353 1354void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1355 enum nl80211_band band, 1356 struct ieee80211_tx_rate *r) 1357{ 1358 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1359 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1360 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1361 case RATE_MCS_CHAN_WIDTH_20: 1362 break; 1363 case RATE_MCS_CHAN_WIDTH_40: 1364 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1365 break; 1366 case RATE_MCS_CHAN_WIDTH_80: 1367 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1368 break; 1369 case RATE_MCS_CHAN_WIDTH_160: 1370 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1371 break; 1372 } 1373 if (rate_n_flags & RATE_MCS_SGI_MSK) 1374 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1375 if (rate_n_flags & RATE_MCS_HT_MSK) { 1376 r->flags |= IEEE80211_TX_RC_MCS; 1377 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1378 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1379 ieee80211_rate_set_vht( 1380 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1381 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1382 RATE_VHT_MCS_NSS_POS) + 1); 1383 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1384 } else { 1385 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1386 band); 1387 } 1388} 1389 1390/* 1391 * translate ucode response to mac80211 tx status control values 1392 */ 1393static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1394 struct ieee80211_tx_info *info) 1395{ 1396 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1397 1398 info->status.antenna = 1399 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1400 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1401} 1402 1403static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1404 u32 status) 1405{ 1406 struct iwl_fw_dbg_trigger_tlv *trig; 1407 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1408 int i; 1409 1410 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1411 FW_DBG_TRIGGER_TX_STATUS); 1412 if (!trig) 1413 return; 1414 1415 status_trig = (void *)trig->data; 1416 1417 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1418 /* don't collect on status 0 */ 1419 if (!status_trig->statuses[i].status) 1420 break; 1421 1422 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1423 continue; 1424 1425 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1426 "Tx status %d was received", 1427 status & TX_STATUS_MSK); 1428 break; 1429 } 1430} 1431 1432/* 1433 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1434 * @tx_resp: the Tx response from the fw (agg or non-agg) 1435 * 1436 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1437 * it can't know that everything will go well until the end of the AMPDU, it 1438 * can't know in advance the number of MPDUs that will be sent in the current 1439 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1440 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1441 * of the batch. This is why the SSN of the SCD is written at the end of the 1442 * whole struct at a variable offset. This function knows how to cope with the 1443 * variable offset and returns the SSN of the SCD. 1444 */ 1445static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1446 struct iwl_mvm_tx_resp *tx_resp) 1447{ 1448 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1449 tx_resp->frame_count) & 0xfff; 1450} 1451 1452static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1453 struct iwl_rx_packet *pkt) 1454{ 1455 struct ieee80211_sta *sta; 1456 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1457 int txq_id = SEQ_TO_QUEUE(sequence); 1458 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1459 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1460 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1461 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1462 struct agg_tx_status *agg_status = 1463 iwl_mvm_get_agg_status(mvm, tx_resp); 1464 u32 status = le16_to_cpu(agg_status->status); 1465 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1466 struct sk_buff_head skbs; 1467 u8 skb_freed = 0; 1468 u8 lq_color; 1469 u16 next_reclaimed, seq_ctl; 1470 bool is_ndp = false; 1471 1472 __skb_queue_head_init(&skbs); 1473 1474 if (iwl_mvm_has_new_tx_api(mvm)) 1475 txq_id = le16_to_cpu(tx_resp->tx_queue); 1476 1477 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1478 1479 /* we can free until ssn % q.n_bd not inclusive */ 1480 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1481 1482 while (!skb_queue_empty(&skbs)) { 1483 struct sk_buff *skb = __skb_dequeue(&skbs); 1484 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1485 struct ieee80211_hdr *hdr = (void *)skb->data; 1486 bool flushed = false; 1487 1488 skb_freed++; 1489 1490 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1491 1492 memset(&info->status, 0, sizeof(info->status)); 1493 1494 /* inform mac80211 about what happened with the frame */ 1495 switch (status & TX_STATUS_MSK) { 1496 case TX_STATUS_SUCCESS: 1497 case TX_STATUS_DIRECT_DONE: 1498 info->flags |= IEEE80211_TX_STAT_ACK; 1499 break; 1500 case TX_STATUS_FAIL_FIFO_FLUSHED: 1501 case TX_STATUS_FAIL_DRAIN_FLOW: 1502 flushed = true; 1503 break; 1504 case TX_STATUS_FAIL_DEST_PS: 1505 /* the FW should have stopped the queue and not 1506 * return this status 1507 */ 1508 WARN_ON(1); 1509 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1510 break; 1511 default: 1512 break; 1513 } 1514 1515 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1516 ieee80211_is_mgmt(hdr->frame_control)) 1517 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1518 1519 /* 1520 * If we are freeing multiple frames, mark all the frames 1521 * but the first one as acked, since they were acknowledged 1522 * before 1523 * */ 1524 if (skb_freed > 1) 1525 info->flags |= IEEE80211_TX_STAT_ACK; 1526 1527 iwl_mvm_tx_status_check_trigger(mvm, status); 1528 1529 info->status.rates[0].count = tx_resp->failure_frame + 1; 1530 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1531 info); 1532 info->status.status_driver_data[1] = 1533 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1534 1535 /* Single frame failure in an AMPDU queue => send BAR */ 1536 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1537 !(info->flags & IEEE80211_TX_STAT_ACK) && 1538 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1539 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1540 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1541 1542 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1543 if (ieee80211_is_back_req(hdr->frame_control)) 1544 seq_ctl = 0; 1545 else if (status != TX_STATUS_SUCCESS) 1546 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1547 1548 if (unlikely(!seq_ctl)) { 1549 struct ieee80211_hdr *hdr = (void *)skb->data; 1550 1551 /* 1552 * If it is an NDP, we can't update next_reclaim since 1553 * its sequence control is 0. Note that for that same 1554 * reason, NDPs are never sent to A-MPDU'able queues 1555 * so that we can never have more than one freed frame 1556 * for a single Tx resonse (see WARN_ON below). 1557 */ 1558 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1559 is_ndp = true; 1560 } 1561 1562 /* 1563 * TODO: this is not accurate if we are freeing more than one 1564 * packet. 1565 */ 1566 info->status.tx_time = 1567 le16_to_cpu(tx_resp->wireless_media_time); 1568 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1569 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1570 info->status.status_driver_data[0] = 1571 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1572 1573 ieee80211_tx_status(mvm->hw, skb); 1574 } 1575 1576 /* This is an aggregation queue or might become one, so we use 1577 * the ssn since: ssn = wifi seq_num % 256. 1578 * The seq_ctl is the sequence control of the packet to which 1579 * this Tx response relates. But if there is a hole in the 1580 * bitmap of the BA we received, this Tx response may allow to 1581 * reclaim the hole and all the subsequent packets that were 1582 * already acked. In that case, seq_ctl != ssn, and the next 1583 * packet to be reclaimed will be ssn and not seq_ctl. In that 1584 * case, several packets will be reclaimed even if 1585 * frame_count = 1. 1586 * 1587 * The ssn is the index (% 256) of the latest packet that has 1588 * treated (acked / dropped) + 1. 1589 */ 1590 next_reclaimed = ssn; 1591 1592 IWL_DEBUG_TX_REPLY(mvm, 1593 "TXQ %d status %s (0x%08x)\n", 1594 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1595 1596 IWL_DEBUG_TX_REPLY(mvm, 1597 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1598 le32_to_cpu(tx_resp->initial_rate), 1599 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1600 ssn, next_reclaimed, seq_ctl); 1601 1602 rcu_read_lock(); 1603 1604 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1605 /* 1606 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1607 * the firmware while we still have packets for it in the Tx queues. 1608 */ 1609 if (WARN_ON_ONCE(!sta)) 1610 goto out; 1611 1612 if (!IS_ERR(sta)) { 1613 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1614 1615 iwl_mvm_tx_airtime(mvm, mvmsta, 1616 le16_to_cpu(tx_resp->wireless_media_time)); 1617 1618 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1619 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1620 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1621 1622 if (sta->wme && tid != IWL_MGMT_TID) { 1623 struct iwl_mvm_tid_data *tid_data = 1624 &mvmsta->tid_data[tid]; 1625 bool send_eosp_ndp = false; 1626 1627 spin_lock_bh(&mvmsta->lock); 1628 1629 if (!is_ndp) { 1630 tid_data->next_reclaimed = next_reclaimed; 1631 IWL_DEBUG_TX_REPLY(mvm, 1632 "Next reclaimed packet:%d\n", 1633 next_reclaimed); 1634 } else { 1635 IWL_DEBUG_TX_REPLY(mvm, 1636 "NDP - don't update next_reclaimed\n"); 1637 } 1638 1639 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1640 1641 if (mvmsta->sleep_tx_count) { 1642 mvmsta->sleep_tx_count--; 1643 if (mvmsta->sleep_tx_count && 1644 !iwl_mvm_tid_queued(mvm, tid_data)) { 1645 /* 1646 * The number of frames in the queue 1647 * dropped to 0 even if we sent less 1648 * frames than we thought we had on the 1649 * Tx queue. 1650 * This means we had holes in the BA 1651 * window that we just filled, ask 1652 * mac80211 to send EOSP since the 1653 * firmware won't know how to do that. 1654 * Send NDP and the firmware will send 1655 * EOSP notification that will trigger 1656 * a call to ieee80211_sta_eosp(). 1657 */ 1658 send_eosp_ndp = true; 1659 } 1660 } 1661 1662 spin_unlock_bh(&mvmsta->lock); 1663 if (send_eosp_ndp) { 1664 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1665 IEEE80211_FRAME_RELEASE_UAPSD, 1666 1, tid, false, false); 1667 mvmsta->sleep_tx_count = 0; 1668 ieee80211_send_eosp_nullfunc(sta, tid); 1669 } 1670 } 1671 1672 if (mvmsta->next_status_eosp) { 1673 mvmsta->next_status_eosp = false; 1674 ieee80211_sta_eosp(sta); 1675 } 1676 } 1677out: 1678 rcu_read_unlock(); 1679} 1680 1681#ifdef CONFIG_IWLWIFI_DEBUG 1682#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1683static const char *iwl_get_agg_tx_status(u16 status) 1684{ 1685 switch (status & AGG_TX_STATE_STATUS_MSK) { 1686 AGG_TX_STATE_(TRANSMITTED); 1687 AGG_TX_STATE_(UNDERRUN); 1688 AGG_TX_STATE_(BT_PRIO); 1689 AGG_TX_STATE_(FEW_BYTES); 1690 AGG_TX_STATE_(ABORT); 1691 AGG_TX_STATE_(TX_ON_AIR_DROP); 1692 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1693 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1694 AGG_TX_STATE_(SCD_QUERY); 1695 AGG_TX_STATE_(TEST_BAD_CRC32); 1696 AGG_TX_STATE_(RESPONSE); 1697 AGG_TX_STATE_(DUMP_TX); 1698 AGG_TX_STATE_(DELAY_TX); 1699 } 1700 1701 return "UNKNOWN"; 1702} 1703 1704static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1705 struct iwl_rx_packet *pkt) 1706{ 1707 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1708 struct agg_tx_status *frame_status = 1709 iwl_mvm_get_agg_status(mvm, tx_resp); 1710 int i; 1711 1712 for (i = 0; i < tx_resp->frame_count; i++) { 1713 u16 fstatus = le16_to_cpu(frame_status[i].status); 1714 1715 IWL_DEBUG_TX_REPLY(mvm, 1716 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1717 iwl_get_agg_tx_status(fstatus), 1718 fstatus & AGG_TX_STATE_STATUS_MSK, 1719 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1720 AGG_TX_STATE_TRY_CNT_POS, 1721 le16_to_cpu(frame_status[i].sequence)); 1722 } 1723} 1724#else 1725static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1726 struct iwl_rx_packet *pkt) 1727{} 1728#endif /* CONFIG_IWLWIFI_DEBUG */ 1729 1730static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1731 struct iwl_rx_packet *pkt) 1732{ 1733 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1734 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1735 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1736 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1737 struct iwl_mvm_sta *mvmsta; 1738 int queue = SEQ_TO_QUEUE(sequence); 1739 struct ieee80211_sta *sta; 1740 1741 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1742 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1743 return; 1744 1745 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1746 1747 rcu_read_lock(); 1748 1749 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1750 1751 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1752 if (WARN_ON_ONCE(!sta || !sta->wme)) { 1753 rcu_read_unlock(); 1754 return; 1755 } 1756 1757 if (!WARN_ON_ONCE(!mvmsta)) { 1758 mvmsta->tid_data[tid].rate_n_flags = 1759 le32_to_cpu(tx_resp->initial_rate); 1760 mvmsta->tid_data[tid].tx_time = 1761 le16_to_cpu(tx_resp->wireless_media_time); 1762 mvmsta->tid_data[tid].lq_color = 1763 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1764 iwl_mvm_tx_airtime(mvm, mvmsta, 1765 le16_to_cpu(tx_resp->wireless_media_time)); 1766 } 1767 1768 rcu_read_unlock(); 1769} 1770 1771void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1772{ 1773 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1774 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1775 1776 if (tx_resp->frame_count == 1) 1777 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1778 else 1779 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1780} 1781 1782static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1783 int txq, int index, 1784 struct ieee80211_tx_info *ba_info, u32 rate) 1785{ 1786 struct sk_buff_head reclaimed_skbs; 1787 struct iwl_mvm_tid_data *tid_data = NULL; 1788 struct ieee80211_sta *sta; 1789 struct iwl_mvm_sta *mvmsta = NULL; 1790 struct sk_buff *skb; 1791 int freed; 1792 1793 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations || 1794 tid > IWL_MAX_TID_COUNT, 1795 "sta_id %d tid %d", sta_id, tid)) 1796 return; 1797 1798 rcu_read_lock(); 1799 1800 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1801 1802 /* Reclaiming frames for a station that has been deleted ? */ 1803 if (WARN_ON_ONCE(!sta)) { 1804 rcu_read_unlock(); 1805 return; 1806 } 1807 1808 __skb_queue_head_init(&reclaimed_skbs); 1809 1810 /* 1811 * Release all TFDs before the SSN, i.e. all TFDs in front of 1812 * block-ack window (we assume that they've been successfully 1813 * transmitted ... if not, it's too late anyway). 1814 */ 1815 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1816 1817 skb_queue_walk(&reclaimed_skbs, skb) { 1818 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1819 1820 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1821 1822 memset(&info->status, 0, sizeof(info->status)); 1823 /* Packet was transmitted successfully, failures come as single 1824 * frames because before failing a frame the firmware transmits 1825 * it without aggregation at least once. 1826 */ 1827 info->flags |= IEEE80211_TX_STAT_ACK; 1828 } 1829 1830 /* 1831 * It's possible to get a BA response after invalidating the rcu (rcu is 1832 * invalidated in order to prevent new Tx from being sent, but there may 1833 * be some frames already in-flight). 1834 * In this case we just want to reclaim, and could skip all the 1835 * sta-dependent stuff since it's in the middle of being removed 1836 * anyways. 1837 */ 1838 if (IS_ERR(sta)) 1839 goto out; 1840 1841 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1842 tid_data = &mvmsta->tid_data[tid]; 1843 1844 if (tid_data->txq_id != txq) { 1845 IWL_ERR(mvm, 1846 "invalid BA notification: Q %d, tid %d\n", 1847 tid_data->txq_id, tid); 1848 rcu_read_unlock(); 1849 return; 1850 } 1851 1852 spin_lock_bh(&mvmsta->lock); 1853 1854 tid_data->next_reclaimed = index; 1855 1856 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1857 1858 freed = 0; 1859 1860 /* pack lq color from tid_data along the reduced txp */ 1861 ba_info->status.status_driver_data[0] = 1862 RS_DRV_DATA_PACK(tid_data->lq_color, 1863 ba_info->status.status_driver_data[0]); 1864 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1865 1866 skb_queue_walk(&reclaimed_skbs, skb) { 1867 struct ieee80211_hdr *hdr = (void *)skb->data; 1868 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1869 1870 if (ieee80211_is_data_qos(hdr->frame_control)) 1871 freed++; 1872 else 1873 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1874 1875 /* this is the first skb we deliver in this batch */ 1876 /* put the rate scaling data there */ 1877 if (freed == 1) { 1878 info->flags |= IEEE80211_TX_STAT_AMPDU; 1879 memcpy(&info->status, &ba_info->status, 1880 sizeof(ba_info->status)); 1881 iwl_mvm_hwrate_to_tx_status(rate, info); 1882 } 1883 } 1884 1885 spin_unlock_bh(&mvmsta->lock); 1886 1887 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1888 * possible (i.e. first MPDU in the aggregation wasn't acked) 1889 * Still it's important to update RS about sent vs. acked. 1890 */ 1891 if (skb_queue_empty(&reclaimed_skbs)) { 1892 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1893 1894 if (mvmsta->vif) 1895 chanctx_conf = 1896 rcu_dereference(mvmsta->vif->chanctx_conf); 1897 1898 if (WARN_ON_ONCE(!chanctx_conf)) 1899 goto out; 1900 1901 ba_info->band = chanctx_conf->def.chan->band; 1902 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1903 1904 if (!iwl_mvm_has_tlc_offload(mvm)) { 1905 IWL_DEBUG_TX_REPLY(mvm, 1906 "No reclaim. Update rs directly\n"); 1907 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1908 } 1909 } 1910 1911out: 1912 rcu_read_unlock(); 1913 1914 while (!skb_queue_empty(&reclaimed_skbs)) { 1915 skb = __skb_dequeue(&reclaimed_skbs); 1916 ieee80211_tx_status(mvm->hw, skb); 1917 } 1918} 1919 1920void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1921{ 1922 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1923 int sta_id, tid, txq, index; 1924 struct ieee80211_tx_info ba_info = {}; 1925 struct iwl_mvm_ba_notif *ba_notif; 1926 struct iwl_mvm_tid_data *tid_data; 1927 struct iwl_mvm_sta *mvmsta; 1928 1929 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1930 1931 if (iwl_mvm_has_new_tx_api(mvm)) { 1932 struct iwl_mvm_compressed_ba_notif *ba_res = 1933 (void *)pkt->data; 1934 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 1935 int i; 1936 1937 sta_id = ba_res->sta_id; 1938 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1939 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1940 ba_info.status.tx_time = 1941 (u16)le32_to_cpu(ba_res->wireless_time); 1942 ba_info.status.status_driver_data[0] = 1943 (void *)(uintptr_t)ba_res->reduced_txp; 1944 1945 if (!le16_to_cpu(ba_res->tfd_cnt)) 1946 goto out; 1947 1948 rcu_read_lock(); 1949 1950 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1951 /* 1952 * It's possible to get a BA response after invalidating the rcu 1953 * (rcu is invalidated in order to prevent new Tx from being 1954 * sent, but there may be some frames already in-flight). 1955 * In this case we just want to reclaim, and could skip all the 1956 * sta-dependent stuff since it's in the middle of being removed 1957 * anyways. 1958 */ 1959 1960 /* Free per TID */ 1961 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { 1962 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1963 &ba_res->tfd[i]; 1964 1965 tid = ba_tfd->tid; 1966 if (tid == IWL_MGMT_TID) 1967 tid = IWL_MAX_TID_COUNT; 1968 1969 if (mvmsta) 1970 mvmsta->tid_data[i].lq_color = lq_color; 1971 1972 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 1973 (int)(le16_to_cpu(ba_tfd->q_num)), 1974 le16_to_cpu(ba_tfd->tfd_index), 1975 &ba_info, 1976 le32_to_cpu(ba_res->tx_rate)); 1977 } 1978 1979 if (mvmsta) 1980 iwl_mvm_tx_airtime(mvm, mvmsta, 1981 le32_to_cpu(ba_res->wireless_time)); 1982 rcu_read_unlock(); 1983out: 1984 IWL_DEBUG_TX_REPLY(mvm, 1985 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1986 sta_id, le32_to_cpu(ba_res->flags), 1987 le16_to_cpu(ba_res->txed), 1988 le16_to_cpu(ba_res->done)); 1989 return; 1990 } 1991 1992 ba_notif = (void *)pkt->data; 1993 sta_id = ba_notif->sta_id; 1994 tid = ba_notif->tid; 1995 /* "flow" corresponds to Tx queue */ 1996 txq = le16_to_cpu(ba_notif->scd_flow); 1997 /* "ssn" is start of block-ack Tx window, corresponds to index 1998 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1999 index = le16_to_cpu(ba_notif->scd_ssn); 2000 2001 rcu_read_lock(); 2002 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 2003 if (WARN_ON_ONCE(!mvmsta)) { 2004 rcu_read_unlock(); 2005 return; 2006 } 2007 2008 tid_data = &mvmsta->tid_data[tid]; 2009 2010 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 2011 ba_info.status.ampdu_len = ba_notif->txed; 2012 ba_info.status.tx_time = tid_data->tx_time; 2013 ba_info.status.status_driver_data[0] = 2014 (void *)(uintptr_t)ba_notif->reduced_txp; 2015 2016 rcu_read_unlock(); 2017 2018 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 2019 tid_data->rate_n_flags); 2020 2021 IWL_DEBUG_TX_REPLY(mvm, 2022 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 2023 ba_notif->sta_addr, ba_notif->sta_id); 2024 2025 IWL_DEBUG_TX_REPLY(mvm, 2026 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2027 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2028 le64_to_cpu(ba_notif->bitmap), txq, index, 2029 ba_notif->txed, ba_notif->txed_2_done); 2030 2031 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2032 ba_notif->reduced_txp); 2033} 2034 2035/* 2036 * Note that there are transports that buffer frames before they reach 2037 * the firmware. This means that after flush_tx_path is called, the 2038 * queue might not be empty. The race-free way to handle this is to: 2039 * 1) set the station as draining 2040 * 2) flush the Tx path 2041 * 3) wait for the transport queues to be empty 2042 */ 2043int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 2044{ 2045 int ret; 2046 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2047 .queues_ctl = cpu_to_le32(tfd_msk), 2048 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2049 }; 2050 2051 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2052 2053 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2054 sizeof(flush_cmd), &flush_cmd); 2055 if (ret) 2056 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2057 return ret; 2058} 2059 2060int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, 2061 u16 tids, u32 flags) 2062{ 2063 int ret; 2064 struct iwl_tx_path_flush_cmd flush_cmd = { 2065 .sta_id = cpu_to_le32(sta_id), 2066 .tid_mask = cpu_to_le16(tids), 2067 }; 2068 2069 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2070 2071 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2072 sizeof(flush_cmd), &flush_cmd); 2073 if (ret) 2074 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2075 return ret; 2076} 2077 2078int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal) 2079{ 2080 struct iwl_mvm_int_sta *int_sta = sta; 2081 struct iwl_mvm_sta *mvm_sta = sta; 2082 2083 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != 2084 offsetof(struct iwl_mvm_sta, sta_id)); 2085 2086 if (iwl_mvm_has_new_tx_api(mvm)) 2087 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xffff, 0); 2088 2089 if (internal) 2090 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 0); 2091 2092 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0); 2093} 2094