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_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_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 /* Make sure we zero enough of dev_cmd */ 508 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd)); 509 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) > sizeof(*tx_cmd)); 510 511 memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd)); 512 dev_cmd->hdr.cmd = TX_CMD; 513 514 if (iwl_mvm_has_new_tx_api(mvm)) { 515 u16 offload_assist = 0; 516 u32 rate_n_flags = 0; 517 u16 flags = 0; 518 struct iwl_mvm_sta *mvmsta = sta ? 519 iwl_mvm_sta_from_mac80211(sta) : NULL; 520 521 if (ieee80211_is_data_qos(hdr->frame_control)) { 522 u8 *qc = ieee80211_get_qos_ctl(hdr); 523 524 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 525 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 526 } 527 528 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, 529 offload_assist); 530 531 /* padding is inserted later in transport */ 532 if (ieee80211_hdrlen(hdr->frame_control) % 4 && 533 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 534 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 535 536 if (!info->control.hw_key) 537 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 538 539 /* 540 * For data packets rate info comes from the fw. Only 541 * set rate/antenna during connection establishment or in case 542 * no station is given. 543 */ 544 if (!sta || !ieee80211_is_data(hdr->frame_control) || 545 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 546 flags |= IWL_TX_FLAGS_CMD_RATE; 547 rate_n_flags = 548 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 549 hdr->frame_control); 550 } 551 552 if (mvm->trans->trans_cfg->device_family >= 553 IWL_DEVICE_FAMILY_AX210) { 554 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 555 556 cmd->offload_assist |= cpu_to_le32(offload_assist); 557 558 /* Total # bytes to be transmitted */ 559 cmd->len = cpu_to_le16((u16)skb->len); 560 561 /* Copy MAC header from skb into command buffer */ 562 memcpy(cmd->hdr, hdr, hdrlen); 563 564 cmd->flags = cpu_to_le16(flags); 565 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 566 } else { 567 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 568 569 cmd->offload_assist |= cpu_to_le16(offload_assist); 570 571 /* Total # bytes to be transmitted */ 572 cmd->len = cpu_to_le16((u16)skb->len); 573 574 /* Copy MAC header from skb into command buffer */ 575 memcpy(cmd->hdr, hdr, hdrlen); 576 577 cmd->flags = cpu_to_le32(flags); 578 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 579 } 580 goto out; 581 } 582 583 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 584 585 if (info->control.hw_key) 586 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 587 588 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 589 590 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 591 592 /* Copy MAC header from skb into command buffer */ 593 memcpy(tx_cmd->hdr, hdr, hdrlen); 594 595 out: 596 return dev_cmd; 597 } 598 599 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 600 struct iwl_device_cmd *cmd) 601 { 602 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 603 604 memset(&skb_info->status, 0, sizeof(skb_info->status)); 605 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 606 607 skb_info->driver_data[1] = cmd; 608 } 609 610 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 611 struct ieee80211_tx_info *info, 612 struct ieee80211_hdr *hdr) 613 { 614 struct iwl_mvm_vif *mvmvif = 615 iwl_mvm_vif_from_mac80211(info->control.vif); 616 __le16 fc = hdr->frame_control; 617 618 switch (info->control.vif->type) { 619 case NL80211_IFTYPE_AP: 620 case NL80211_IFTYPE_ADHOC: 621 /* 622 * Non-bufferable frames use the broadcast station, thus they 623 * use the probe queue. 624 * Also take care of the case where we send a deauth to a 625 * station that we don't have, or similarly an association 626 * response (with non-success status) for a station we can't 627 * accept. 628 * Also, disassociate frames might happen, particular with 629 * reason 7 ("Class 3 frame received from nonassociated STA"). 630 */ 631 if (ieee80211_is_mgmt(fc) && 632 (!ieee80211_is_bufferable_mmpdu(fc) || 633 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 634 return mvm->probe_queue; 635 636 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 637 is_multicast_ether_addr(hdr->addr1)) 638 return mvmvif->cab_queue; 639 640 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 641 "fc=0x%02x", le16_to_cpu(fc)); 642 return mvm->probe_queue; 643 case NL80211_IFTYPE_P2P_DEVICE: 644 if (ieee80211_is_mgmt(fc)) 645 return mvm->p2p_dev_queue; 646 647 WARN_ON_ONCE(1); 648 return mvm->p2p_dev_queue; 649 default: 650 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 651 return -1; 652 } 653 } 654 655 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 656 struct sk_buff *skb) 657 { 658 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 659 struct iwl_mvm_vif *mvmvif = 660 iwl_mvm_vif_from_mac80211(info->control.vif); 661 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 662 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 663 struct iwl_probe_resp_data *resp_data; 664 u8 *ie, *pos; 665 u8 match[] = { 666 (WLAN_OUI_WFA >> 16) & 0xff, 667 (WLAN_OUI_WFA >> 8) & 0xff, 668 WLAN_OUI_WFA & 0xff, 669 WLAN_OUI_TYPE_WFA_P2P, 670 }; 671 672 rcu_read_lock(); 673 674 resp_data = rcu_dereference(mvmvif->probe_resp_data); 675 if (!resp_data) 676 goto out; 677 678 if (!resp_data->notif.noa_active) 679 goto out; 680 681 ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 682 mgmt->u.probe_resp.variable, 683 skb->len - base_len, 684 match, 4, 2); 685 if (!ie) { 686 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 687 goto out; 688 } 689 690 if (skb_tailroom(skb) < resp_data->noa_len) { 691 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 692 IWL_ERR(mvm, 693 "Failed to reallocate probe resp\n"); 694 goto out; 695 } 696 } 697 698 pos = skb_put(skb, resp_data->noa_len); 699 700 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 701 /* Set length of IE body (not including ID and length itself) */ 702 *pos++ = resp_data->noa_len - 2; 703 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 704 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 705 *pos++ = WLAN_OUI_WFA & 0xff; 706 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 707 708 memcpy(pos, &resp_data->notif.noa_attr, 709 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 710 711 out: 712 rcu_read_unlock(); 713 } 714 715 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 716 { 717 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 718 struct ieee80211_tx_info info; 719 struct iwl_device_cmd *dev_cmd; 720 u8 sta_id; 721 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 722 __le16 fc = hdr->frame_control; 723 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 724 IEEE80211_TX_CTL_TX_OFFCHAN; 725 int queue = -1; 726 727 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 728 return -1; 729 730 memcpy(&info, skb->cb, sizeof(info)); 731 732 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen)) 733 return -1; 734 735 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 736 return -1; 737 738 if (info.control.vif) { 739 struct iwl_mvm_vif *mvmvif = 740 iwl_mvm_vif_from_mac80211(info.control.vif); 741 742 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 743 info.control.vif->type == NL80211_IFTYPE_AP || 744 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 745 if (!ieee80211_is_data(hdr->frame_control)) 746 sta_id = mvmvif->bcast_sta.sta_id; 747 else 748 sta_id = mvmvif->mcast_sta.sta_id; 749 750 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr); 751 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 752 queue = mvm->snif_queue; 753 sta_id = mvm->snif_sta.sta_id; 754 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 755 offchannel) { 756 /* 757 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 758 * that can be used in 2 different types of vifs, P2P & 759 * STATION. 760 * P2P uses the offchannel queue. 761 * STATION (HS2.0) uses the auxiliary context of the FW, 762 * and hence needs to be sent on the aux queue. 763 */ 764 sta_id = mvm->aux_sta.sta_id; 765 queue = mvm->aux_queue; 766 } 767 } 768 769 if (queue < 0) { 770 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 771 return -1; 772 } 773 774 if (unlikely(ieee80211_is_probe_resp(fc))) 775 iwl_mvm_probe_resp_set_noa(mvm, skb); 776 777 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 778 779 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 780 if (!dev_cmd) 781 return -1; 782 783 /* From now on, we cannot access info->control */ 784 iwl_mvm_skb_prepare_status(skb, dev_cmd); 785 786 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 787 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 788 return -1; 789 } 790 791 return 0; 792 } 793 794 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 795 struct ieee80211_sta *sta, unsigned int tid) 796 { 797 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 798 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band; 799 u8 ac = tid_to_mac80211_ac[tid]; 800 unsigned int txf; 801 int lmac = IWL_LMAC_24G_INDEX; 802 803 if (iwl_mvm_is_cdb_supported(mvm) && 804 band == NL80211_BAND_5GHZ) 805 lmac = IWL_LMAC_5G_INDEX; 806 807 /* For HE redirect to trigger based fifos */ 808 if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 809 ac += 4; 810 811 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 812 813 /* 814 * Don't send an AMSDU that will be longer than the TXF. 815 * Add a security margin of 256 for the TX command + headers. 816 * We also want to have the start of the next packet inside the 817 * fifo to be able to send bursts. 818 */ 819 return min_t(unsigned int, mvmsta->max_amsdu_len, 820 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 821 } 822 823 #ifdef CONFIG_INET 824 825 static int 826 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 827 netdev_features_t netdev_flags, 828 struct sk_buff_head *mpdus_skb) 829 { 830 struct sk_buff *tmp, *next; 831 struct ieee80211_hdr *hdr = (void *)skb->data; 832 char cb[sizeof(skb->cb)]; 833 u16 i = 0; 834 unsigned int tcp_payload_len; 835 unsigned int mss = skb_shinfo(skb)->gso_size; 836 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 837 bool qos = ieee80211_is_data_qos(hdr->frame_control); 838 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 839 840 skb_shinfo(skb)->gso_size = num_subframes * mss; 841 memcpy(cb, skb->cb, sizeof(cb)); 842 843 next = skb_gso_segment(skb, netdev_flags); 844 skb_shinfo(skb)->gso_size = mss; 845 if (WARN_ON_ONCE(IS_ERR(next))) 846 return -EINVAL; 847 else if (next) 848 consume_skb(skb); 849 850 while (next) { 851 tmp = next; 852 next = tmp->next; 853 854 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 855 /* 856 * Compute the length of all the data added for the A-MSDU. 857 * This will be used to compute the length to write in the TX 858 * command. We have: SNAP + IP + TCP for n -1 subframes and 859 * ETH header for n subframes. 860 */ 861 tcp_payload_len = skb_tail_pointer(tmp) - 862 skb_transport_header(tmp) - 863 tcp_hdrlen(tmp) + tmp->data_len; 864 865 if (ipv4) 866 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 867 868 if (tcp_payload_len > mss) { 869 skb_shinfo(tmp)->gso_size = mss; 870 } else { 871 if (qos) { 872 u8 *qc; 873 874 if (ipv4) 875 ip_send_check(ip_hdr(tmp)); 876 877 qc = ieee80211_get_qos_ctl((void *)tmp->data); 878 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 879 } 880 skb_shinfo(tmp)->gso_size = 0; 881 } 882 883 tmp->prev = NULL; 884 tmp->next = NULL; 885 886 __skb_queue_tail(mpdus_skb, tmp); 887 i++; 888 } 889 890 return 0; 891 } 892 893 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 894 struct ieee80211_tx_info *info, 895 struct ieee80211_sta *sta, 896 struct sk_buff_head *mpdus_skb) 897 { 898 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 899 struct ieee80211_hdr *hdr = (void *)skb->data; 900 unsigned int mss = skb_shinfo(skb)->gso_size; 901 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 902 u16 snap_ip_tcp, pad; 903 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 904 u8 tid; 905 906 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 907 tcp_hdrlen(skb); 908 909 if (!mvmsta->max_amsdu_len || 910 !ieee80211_is_data_qos(hdr->frame_control) || 911 !mvmsta->amsdu_enabled) 912 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 913 914 /* 915 * Do not build AMSDU for IPv6 with extension headers. 916 * ask stack to segment and checkum the generated MPDUs for us. 917 */ 918 if (skb->protocol == htons(ETH_P_IPV6) && 919 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 920 IPPROTO_TCP) { 921 netdev_flags &= ~NETIF_F_CSUM_MASK; 922 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 923 } 924 925 tid = ieee80211_get_tid(hdr); 926 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 927 return -EINVAL; 928 929 /* 930 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 931 * during an BA session. 932 */ 933 if (info->flags & IEEE80211_TX_CTL_AMPDU && 934 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) 935 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 936 937 if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) || 938 !(mvmsta->amsdu_enabled & BIT(tid))) 939 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 940 941 /* 942 * Take the min of ieee80211 station and mvm station 943 */ 944 max_amsdu_len = 945 min_t(unsigned int, sta->max_amsdu_len, 946 iwl_mvm_max_amsdu_size(mvm, sta, tid)); 947 948 /* 949 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 950 * supported. This is a spec requirement (IEEE 802.11-2015 951 * section 8.7.3 NOTE 3). 952 */ 953 if (info->flags & IEEE80211_TX_CTL_AMPDU && 954 !sta->vht_cap.vht_supported) 955 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 956 957 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 958 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 959 pad = (4 - subf_len) & 0x3; 960 961 /* 962 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 963 * N * subf_len + (N - 1) * pad. 964 */ 965 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 966 967 if (sta->max_amsdu_subframes && 968 num_subframes > sta->max_amsdu_subframes) 969 num_subframes = sta->max_amsdu_subframes; 970 971 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 972 tcp_hdrlen(skb) + skb->data_len; 973 974 /* 975 * Make sure we have enough TBs for the A-MSDU: 976 * 2 for each subframe 977 * 1 more for each fragment 978 * 1 more for the potential data in the header 979 */ 980 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 981 mvm->trans->max_skb_frags) 982 num_subframes = 1; 983 984 if (num_subframes > 1) 985 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 986 987 /* This skb fits in one single A-MSDU */ 988 if (num_subframes * mss >= tcp_payload_len) { 989 __skb_queue_tail(mpdus_skb, skb); 990 return 0; 991 } 992 993 /* 994 * Trick the segmentation function to make it 995 * create SKBs that can fit into one A-MSDU. 996 */ 997 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 998 mpdus_skb); 999 } 1000 #else /* CONFIG_INET */ 1001 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 1002 struct ieee80211_tx_info *info, 1003 struct ieee80211_sta *sta, 1004 struct sk_buff_head *mpdus_skb) 1005 { 1006 /* Impossible to get TSO with CONFIG_INET */ 1007 WARN_ON(1); 1008 1009 return -1; 1010 } 1011 #endif 1012 1013 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1014 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1015 { 1016 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1017 unsigned long now = jiffies; 1018 int tid; 1019 1020 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1021 return false; 1022 1023 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1024 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1025 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1026 return true; 1027 } 1028 1029 return false; 1030 } 1031 1032 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1033 struct iwl_mvm_sta *mvmsta, 1034 int airtime) 1035 { 1036 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1037 struct iwl_mvm_tcm_mac *mdata; 1038 1039 if (mac >= NUM_MAC_INDEX_DRIVER) 1040 return; 1041 1042 mdata = &mvm->tcm.data[mac]; 1043 1044 if (mvm->tcm.paused) 1045 return; 1046 1047 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1048 schedule_delayed_work(&mvm->tcm.work, 0); 1049 1050 mdata->tx.airtime += airtime; 1051 } 1052 1053 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1054 struct iwl_mvm_sta *mvmsta, int tid) 1055 { 1056 u32 ac = tid_to_mac80211_ac[tid]; 1057 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1058 struct iwl_mvm_tcm_mac *mdata; 1059 1060 if (mac >= NUM_MAC_INDEX_DRIVER) 1061 return -EINVAL; 1062 1063 mdata = &mvm->tcm.data[mac]; 1064 1065 mdata->tx.pkts[ac]++; 1066 1067 return 0; 1068 } 1069 1070 /* 1071 * Sets the fields in the Tx cmd that are crypto related. 1072 * 1073 * This function must be called with BHs disabled. 1074 */ 1075 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1076 struct ieee80211_tx_info *info, 1077 struct ieee80211_sta *sta) 1078 { 1079 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1080 struct iwl_mvm_sta *mvmsta; 1081 struct iwl_device_cmd *dev_cmd; 1082 __le16 fc; 1083 u16 seq_number = 0; 1084 u8 tid = IWL_MAX_TID_COUNT; 1085 u16 txq_id; 1086 bool is_ampdu = false; 1087 int hdrlen; 1088 1089 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1090 fc = hdr->frame_control; 1091 hdrlen = ieee80211_hdrlen(fc); 1092 1093 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1094 return -1; 1095 1096 if (WARN_ON_ONCE(!mvmsta)) 1097 return -1; 1098 1099 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1100 return -1; 1101 1102 if (unlikely(ieee80211_is_probe_resp(fc))) 1103 iwl_mvm_probe_resp_set_noa(mvm, skb); 1104 1105 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1106 sta, mvmsta->sta_id); 1107 if (!dev_cmd) 1108 goto drop; 1109 1110 /* 1111 * we handle that entirely ourselves -- for uAPSD the firmware 1112 * will always send a notification, and for PS-Poll responses 1113 * we'll notify mac80211 when getting frame status 1114 */ 1115 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1116 1117 spin_lock(&mvmsta->lock); 1118 1119 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1120 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 1121 * assignment of MGMT TID 1122 */ 1123 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1124 tid = ieee80211_get_tid(hdr); 1125 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid)) 1126 goto drop_unlock_sta; 1127 1128 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1129 if (WARN_ONCE(is_ampdu && 1130 mvmsta->tid_data[tid].state != IWL_AGG_ON, 1131 "Invalid internal agg state %d for TID %d", 1132 mvmsta->tid_data[tid].state, tid)) 1133 goto drop_unlock_sta; 1134 1135 seq_number = mvmsta->tid_data[tid].seq_number; 1136 seq_number &= IEEE80211_SCTL_SEQ; 1137 1138 if (!iwl_mvm_has_new_tx_api(mvm)) { 1139 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1140 1141 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1142 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1143 /* update the tx_cmd hdr as it was already copied */ 1144 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1145 } 1146 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) { 1147 tid = IWL_TID_NON_QOS; 1148 } 1149 1150 txq_id = mvmsta->tid_data[tid].txq_id; 1151 1152 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1153 1154 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) { 1155 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1156 spin_unlock(&mvmsta->lock); 1157 return 0; 1158 } 1159 1160 if (!iwl_mvm_has_new_tx_api(mvm)) { 1161 /* Keep track of the time of the last frame for this RA/TID */ 1162 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1163 1164 /* 1165 * If we have timed-out TIDs - schedule the worker that will 1166 * reconfig the queues and update them 1167 * 1168 * Note that the no lock is taken here in order to not serialize 1169 * the TX flow. This isn't dangerous because scheduling 1170 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1171 * schedule it due to some race condition then next TX we get 1172 * here we will. 1173 */ 1174 if (unlikely(mvm->queue_info[txq_id].status == 1175 IWL_MVM_QUEUE_SHARED && 1176 iwl_mvm_txq_should_update(mvm, txq_id))) 1177 schedule_work(&mvm->add_stream_wk); 1178 } 1179 1180 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n", 1181 mvmsta->sta_id, tid, txq_id, 1182 IEEE80211_SEQ_TO_SN(seq_number), skb->len); 1183 1184 /* From now on, we cannot access info->control */ 1185 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1186 1187 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1188 goto drop_unlock_sta; 1189 1190 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1191 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1192 1193 spin_unlock(&mvmsta->lock); 1194 1195 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1196 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1197 goto drop; 1198 1199 return 0; 1200 1201 drop_unlock_sta: 1202 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1203 spin_unlock(&mvmsta->lock); 1204 drop: 1205 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid); 1206 return -1; 1207 } 1208 1209 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 1210 struct ieee80211_sta *sta) 1211 { 1212 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1213 struct ieee80211_tx_info info; 1214 struct sk_buff_head mpdus_skbs; 1215 unsigned int payload_len; 1216 int ret; 1217 1218 if (WARN_ON_ONCE(!mvmsta)) 1219 return -1; 1220 1221 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1222 return -1; 1223 1224 memcpy(&info, skb->cb, sizeof(info)); 1225 1226 if (!skb_is_gso(skb)) 1227 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1228 1229 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1230 tcp_hdrlen(skb) + skb->data_len; 1231 1232 if (payload_len <= skb_shinfo(skb)->gso_size) 1233 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1234 1235 __skb_queue_head_init(&mpdus_skbs); 1236 1237 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1238 if (ret) 1239 return ret; 1240 1241 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1242 return ret; 1243 1244 while (!skb_queue_empty(&mpdus_skbs)) { 1245 skb = __skb_dequeue(&mpdus_skbs); 1246 1247 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1248 if (ret) { 1249 __skb_queue_purge(&mpdus_skbs); 1250 return ret; 1251 } 1252 } 1253 1254 return 0; 1255 } 1256 1257 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1258 struct ieee80211_sta *sta, u8 tid) 1259 { 1260 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1261 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1262 struct ieee80211_vif *vif = mvmsta->vif; 1263 u16 normalized_ssn; 1264 1265 lockdep_assert_held(&mvmsta->lock); 1266 1267 if ((tid_data->state == IWL_AGG_ON || 1268 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1269 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1270 /* 1271 * Now that this aggregation or DQA queue is empty tell 1272 * mac80211 so it knows we no longer have frames buffered for 1273 * the station on this TID (for the TIM bitmap calculation.) 1274 */ 1275 ieee80211_sta_set_buffered(sta, tid, false); 1276 } 1277 1278 /* 1279 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1280 * to align the wrap around of ssn so we compare relevant values. 1281 */ 1282 normalized_ssn = tid_data->ssn; 1283 if (mvm->trans->trans_cfg->gen2) 1284 normalized_ssn &= 0xff; 1285 1286 if (normalized_ssn != tid_data->next_reclaimed) 1287 return; 1288 1289 switch (tid_data->state) { 1290 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1291 IWL_DEBUG_TX_QUEUES(mvm, 1292 "Can continue addBA flow ssn = next_recl = %d\n", 1293 tid_data->next_reclaimed); 1294 tid_data->state = IWL_AGG_STARTING; 1295 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1296 break; 1297 1298 case IWL_EMPTYING_HW_QUEUE_DELBA: 1299 IWL_DEBUG_TX_QUEUES(mvm, 1300 "Can continue DELBA flow ssn = next_recl = %d\n", 1301 tid_data->next_reclaimed); 1302 tid_data->state = IWL_AGG_OFF; 1303 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1304 break; 1305 1306 default: 1307 break; 1308 } 1309 } 1310 1311 #ifdef CONFIG_IWLWIFI_DEBUG 1312 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1313 { 1314 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1315 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1316 1317 switch (status & TX_STATUS_MSK) { 1318 case TX_STATUS_SUCCESS: 1319 return "SUCCESS"; 1320 TX_STATUS_POSTPONE(DELAY); 1321 TX_STATUS_POSTPONE(FEW_BYTES); 1322 TX_STATUS_POSTPONE(BT_PRIO); 1323 TX_STATUS_POSTPONE(QUIET_PERIOD); 1324 TX_STATUS_POSTPONE(CALC_TTAK); 1325 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1326 TX_STATUS_FAIL(SHORT_LIMIT); 1327 TX_STATUS_FAIL(LONG_LIMIT); 1328 TX_STATUS_FAIL(UNDERRUN); 1329 TX_STATUS_FAIL(DRAIN_FLOW); 1330 TX_STATUS_FAIL(RFKILL_FLUSH); 1331 TX_STATUS_FAIL(LIFE_EXPIRE); 1332 TX_STATUS_FAIL(DEST_PS); 1333 TX_STATUS_FAIL(HOST_ABORTED); 1334 TX_STATUS_FAIL(BT_RETRY); 1335 TX_STATUS_FAIL(STA_INVALID); 1336 TX_STATUS_FAIL(FRAG_DROPPED); 1337 TX_STATUS_FAIL(TID_DISABLE); 1338 TX_STATUS_FAIL(FIFO_FLUSHED); 1339 TX_STATUS_FAIL(SMALL_CF_POLL); 1340 TX_STATUS_FAIL(FW_DROP); 1341 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1342 } 1343 1344 return "UNKNOWN"; 1345 1346 #undef TX_STATUS_FAIL 1347 #undef TX_STATUS_POSTPONE 1348 } 1349 #endif /* CONFIG_IWLWIFI_DEBUG */ 1350 1351 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1352 enum nl80211_band band, 1353 struct ieee80211_tx_rate *r) 1354 { 1355 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1356 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1357 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1358 case RATE_MCS_CHAN_WIDTH_20: 1359 break; 1360 case RATE_MCS_CHAN_WIDTH_40: 1361 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1362 break; 1363 case RATE_MCS_CHAN_WIDTH_80: 1364 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1365 break; 1366 case RATE_MCS_CHAN_WIDTH_160: 1367 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1368 break; 1369 } 1370 if (rate_n_flags & RATE_MCS_SGI_MSK) 1371 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1372 if (rate_n_flags & RATE_MCS_HT_MSK) { 1373 r->flags |= IEEE80211_TX_RC_MCS; 1374 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1375 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1376 ieee80211_rate_set_vht( 1377 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1378 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1379 RATE_VHT_MCS_NSS_POS) + 1); 1380 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1381 } else { 1382 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1383 band); 1384 } 1385 } 1386 1387 /** 1388 * translate ucode response to mac80211 tx status control values 1389 */ 1390 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1391 struct ieee80211_tx_info *info) 1392 { 1393 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1394 1395 info->status.antenna = 1396 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1397 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1398 } 1399 1400 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1401 u32 status) 1402 { 1403 struct iwl_fw_dbg_trigger_tlv *trig; 1404 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1405 int i; 1406 1407 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1408 FW_DBG_TRIGGER_TX_STATUS); 1409 if (!trig) 1410 return; 1411 1412 status_trig = (void *)trig->data; 1413 1414 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1415 /* don't collect on status 0 */ 1416 if (!status_trig->statuses[i].status) 1417 break; 1418 1419 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1420 continue; 1421 1422 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1423 "Tx status %d was received", 1424 status & TX_STATUS_MSK); 1425 break; 1426 } 1427 } 1428 1429 /** 1430 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1431 * @tx_resp: the Tx response from the fw (agg or non-agg) 1432 * 1433 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1434 * it can't know that everything will go well until the end of the AMPDU, it 1435 * can't know in advance the number of MPDUs that will be sent in the current 1436 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1437 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1438 * of the batch. This is why the SSN of the SCD is written at the end of the 1439 * whole struct at a variable offset. This function knows how to cope with the 1440 * variable offset and returns the SSN of the SCD. 1441 */ 1442 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1443 struct iwl_mvm_tx_resp *tx_resp) 1444 { 1445 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1446 tx_resp->frame_count) & 0xfff; 1447 } 1448 1449 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1450 struct iwl_rx_packet *pkt) 1451 { 1452 struct ieee80211_sta *sta; 1453 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1454 int txq_id = SEQ_TO_QUEUE(sequence); 1455 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1456 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1457 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1458 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1459 struct agg_tx_status *agg_status = 1460 iwl_mvm_get_agg_status(mvm, tx_resp); 1461 u32 status = le16_to_cpu(agg_status->status); 1462 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1463 struct sk_buff_head skbs; 1464 u8 skb_freed = 0; 1465 u8 lq_color; 1466 u16 next_reclaimed, seq_ctl; 1467 bool is_ndp = false; 1468 1469 __skb_queue_head_init(&skbs); 1470 1471 if (iwl_mvm_has_new_tx_api(mvm)) 1472 txq_id = le16_to_cpu(tx_resp->tx_queue); 1473 1474 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1475 1476 /* we can free until ssn % q.n_bd not inclusive */ 1477 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1478 1479 while (!skb_queue_empty(&skbs)) { 1480 struct sk_buff *skb = __skb_dequeue(&skbs); 1481 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1482 struct ieee80211_hdr *hdr = (void *)skb->data; 1483 bool flushed = false; 1484 1485 skb_freed++; 1486 1487 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1488 1489 memset(&info->status, 0, sizeof(info->status)); 1490 1491 /* inform mac80211 about what happened with the frame */ 1492 switch (status & TX_STATUS_MSK) { 1493 case TX_STATUS_SUCCESS: 1494 case TX_STATUS_DIRECT_DONE: 1495 info->flags |= IEEE80211_TX_STAT_ACK; 1496 break; 1497 case TX_STATUS_FAIL_FIFO_FLUSHED: 1498 case TX_STATUS_FAIL_DRAIN_FLOW: 1499 flushed = true; 1500 break; 1501 case TX_STATUS_FAIL_DEST_PS: 1502 /* the FW should have stopped the queue and not 1503 * return this status 1504 */ 1505 WARN_ON(1); 1506 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1507 break; 1508 default: 1509 break; 1510 } 1511 1512 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1513 ieee80211_is_mgmt(hdr->frame_control)) 1514 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1515 1516 /* 1517 * If we are freeing multiple frames, mark all the frames 1518 * but the first one as acked, since they were acknowledged 1519 * before 1520 * */ 1521 if (skb_freed > 1) 1522 info->flags |= IEEE80211_TX_STAT_ACK; 1523 1524 iwl_mvm_tx_status_check_trigger(mvm, status); 1525 1526 info->status.rates[0].count = tx_resp->failure_frame + 1; 1527 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1528 info); 1529 info->status.status_driver_data[1] = 1530 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1531 1532 /* Single frame failure in an AMPDU queue => send BAR */ 1533 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1534 !(info->flags & IEEE80211_TX_STAT_ACK) && 1535 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1536 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1537 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1538 1539 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1540 if (ieee80211_is_back_req(hdr->frame_control)) 1541 seq_ctl = 0; 1542 else if (status != TX_STATUS_SUCCESS) 1543 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1544 1545 if (unlikely(!seq_ctl)) { 1546 struct ieee80211_hdr *hdr = (void *)skb->data; 1547 1548 /* 1549 * If it is an NDP, we can't update next_reclaim since 1550 * its sequence control is 0. Note that for that same 1551 * reason, NDPs are never sent to A-MPDU'able queues 1552 * so that we can never have more than one freed frame 1553 * for a single Tx resonse (see WARN_ON below). 1554 */ 1555 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1556 is_ndp = true; 1557 } 1558 1559 /* 1560 * TODO: this is not accurate if we are freeing more than one 1561 * packet. 1562 */ 1563 info->status.tx_time = 1564 le16_to_cpu(tx_resp->wireless_media_time); 1565 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1566 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1567 info->status.status_driver_data[0] = 1568 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1569 1570 ieee80211_tx_status(mvm->hw, skb); 1571 } 1572 1573 /* This is an aggregation queue or might become one, so we use 1574 * the ssn since: ssn = wifi seq_num % 256. 1575 * The seq_ctl is the sequence control of the packet to which 1576 * this Tx response relates. But if there is a hole in the 1577 * bitmap of the BA we received, this Tx response may allow to 1578 * reclaim the hole and all the subsequent packets that were 1579 * already acked. In that case, seq_ctl != ssn, and the next 1580 * packet to be reclaimed will be ssn and not seq_ctl. In that 1581 * case, several packets will be reclaimed even if 1582 * frame_count = 1. 1583 * 1584 * The ssn is the index (% 256) of the latest packet that has 1585 * treated (acked / dropped) + 1. 1586 */ 1587 next_reclaimed = ssn; 1588 1589 IWL_DEBUG_TX_REPLY(mvm, 1590 "TXQ %d status %s (0x%08x)\n", 1591 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1592 1593 IWL_DEBUG_TX_REPLY(mvm, 1594 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1595 le32_to_cpu(tx_resp->initial_rate), 1596 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1597 ssn, next_reclaimed, seq_ctl); 1598 1599 rcu_read_lock(); 1600 1601 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1602 /* 1603 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1604 * the firmware while we still have packets for it in the Tx queues. 1605 */ 1606 if (WARN_ON_ONCE(!sta)) 1607 goto out; 1608 1609 if (!IS_ERR(sta)) { 1610 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1611 1612 iwl_mvm_tx_airtime(mvm, mvmsta, 1613 le16_to_cpu(tx_resp->wireless_media_time)); 1614 1615 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1616 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1617 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1618 1619 if (sta->wme && tid != IWL_MGMT_TID) { 1620 struct iwl_mvm_tid_data *tid_data = 1621 &mvmsta->tid_data[tid]; 1622 bool send_eosp_ndp = false; 1623 1624 spin_lock_bh(&mvmsta->lock); 1625 1626 if (!is_ndp) { 1627 tid_data->next_reclaimed = next_reclaimed; 1628 IWL_DEBUG_TX_REPLY(mvm, 1629 "Next reclaimed packet:%d\n", 1630 next_reclaimed); 1631 } else { 1632 IWL_DEBUG_TX_REPLY(mvm, 1633 "NDP - don't update next_reclaimed\n"); 1634 } 1635 1636 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1637 1638 if (mvmsta->sleep_tx_count) { 1639 mvmsta->sleep_tx_count--; 1640 if (mvmsta->sleep_tx_count && 1641 !iwl_mvm_tid_queued(mvm, tid_data)) { 1642 /* 1643 * The number of frames in the queue 1644 * dropped to 0 even if we sent less 1645 * frames than we thought we had on the 1646 * Tx queue. 1647 * This means we had holes in the BA 1648 * window that we just filled, ask 1649 * mac80211 to send EOSP since the 1650 * firmware won't know how to do that. 1651 * Send NDP and the firmware will send 1652 * EOSP notification that will trigger 1653 * a call to ieee80211_sta_eosp(). 1654 */ 1655 send_eosp_ndp = true; 1656 } 1657 } 1658 1659 spin_unlock_bh(&mvmsta->lock); 1660 if (send_eosp_ndp) { 1661 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1662 IEEE80211_FRAME_RELEASE_UAPSD, 1663 1, tid, false, false); 1664 mvmsta->sleep_tx_count = 0; 1665 ieee80211_send_eosp_nullfunc(sta, tid); 1666 } 1667 } 1668 1669 if (mvmsta->next_status_eosp) { 1670 mvmsta->next_status_eosp = false; 1671 ieee80211_sta_eosp(sta); 1672 } 1673 } 1674 out: 1675 rcu_read_unlock(); 1676 } 1677 1678 #ifdef CONFIG_IWLWIFI_DEBUG 1679 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1680 static const char *iwl_get_agg_tx_status(u16 status) 1681 { 1682 switch (status & AGG_TX_STATE_STATUS_MSK) { 1683 AGG_TX_STATE_(TRANSMITTED); 1684 AGG_TX_STATE_(UNDERRUN); 1685 AGG_TX_STATE_(BT_PRIO); 1686 AGG_TX_STATE_(FEW_BYTES); 1687 AGG_TX_STATE_(ABORT); 1688 AGG_TX_STATE_(TX_ON_AIR_DROP); 1689 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1690 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1691 AGG_TX_STATE_(SCD_QUERY); 1692 AGG_TX_STATE_(TEST_BAD_CRC32); 1693 AGG_TX_STATE_(RESPONSE); 1694 AGG_TX_STATE_(DUMP_TX); 1695 AGG_TX_STATE_(DELAY_TX); 1696 } 1697 1698 return "UNKNOWN"; 1699 } 1700 1701 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1702 struct iwl_rx_packet *pkt) 1703 { 1704 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1705 struct agg_tx_status *frame_status = 1706 iwl_mvm_get_agg_status(mvm, tx_resp); 1707 int i; 1708 1709 for (i = 0; i < tx_resp->frame_count; i++) { 1710 u16 fstatus = le16_to_cpu(frame_status[i].status); 1711 1712 IWL_DEBUG_TX_REPLY(mvm, 1713 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1714 iwl_get_agg_tx_status(fstatus), 1715 fstatus & AGG_TX_STATE_STATUS_MSK, 1716 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1717 AGG_TX_STATE_TRY_CNT_POS, 1718 le16_to_cpu(frame_status[i].sequence)); 1719 } 1720 } 1721 #else 1722 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1723 struct iwl_rx_packet *pkt) 1724 {} 1725 #endif /* CONFIG_IWLWIFI_DEBUG */ 1726 1727 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1728 struct iwl_rx_packet *pkt) 1729 { 1730 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1731 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1732 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1733 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1734 struct iwl_mvm_sta *mvmsta; 1735 int queue = SEQ_TO_QUEUE(sequence); 1736 struct ieee80211_sta *sta; 1737 1738 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1739 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1740 return; 1741 1742 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1743 1744 rcu_read_lock(); 1745 1746 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1747 1748 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1749 if (WARN_ON_ONCE(!sta || !sta->wme)) { 1750 rcu_read_unlock(); 1751 return; 1752 } 1753 1754 if (!WARN_ON_ONCE(!mvmsta)) { 1755 mvmsta->tid_data[tid].rate_n_flags = 1756 le32_to_cpu(tx_resp->initial_rate); 1757 mvmsta->tid_data[tid].tx_time = 1758 le16_to_cpu(tx_resp->wireless_media_time); 1759 mvmsta->tid_data[tid].lq_color = 1760 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1761 iwl_mvm_tx_airtime(mvm, mvmsta, 1762 le16_to_cpu(tx_resp->wireless_media_time)); 1763 } 1764 1765 rcu_read_unlock(); 1766 } 1767 1768 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1769 { 1770 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1771 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1772 1773 if (tx_resp->frame_count == 1) 1774 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1775 else 1776 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1777 } 1778 1779 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1780 int txq, int index, 1781 struct ieee80211_tx_info *ba_info, u32 rate) 1782 { 1783 struct sk_buff_head reclaimed_skbs; 1784 struct iwl_mvm_tid_data *tid_data; 1785 struct ieee80211_sta *sta; 1786 struct iwl_mvm_sta *mvmsta; 1787 struct sk_buff *skb; 1788 int freed; 1789 1790 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1791 tid > IWL_MAX_TID_COUNT, 1792 "sta_id %d tid %d", sta_id, tid)) 1793 return; 1794 1795 rcu_read_lock(); 1796 1797 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1798 1799 /* Reclaiming frames for a station that has been deleted ? */ 1800 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1801 rcu_read_unlock(); 1802 return; 1803 } 1804 1805 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1806 tid_data = &mvmsta->tid_data[tid]; 1807 1808 if (tid_data->txq_id != txq) { 1809 IWL_ERR(mvm, 1810 "invalid BA notification: Q %d, tid %d\n", 1811 tid_data->txq_id, tid); 1812 rcu_read_unlock(); 1813 return; 1814 } 1815 1816 __skb_queue_head_init(&reclaimed_skbs); 1817 1818 /* 1819 * Release all TFDs before the SSN, i.e. all TFDs in front of 1820 * block-ack window (we assume that they've been successfully 1821 * transmitted ... if not, it's too late anyway). 1822 */ 1823 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1824 1825 spin_lock_bh(&mvmsta->lock); 1826 1827 tid_data->next_reclaimed = index; 1828 1829 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1830 1831 freed = 0; 1832 1833 /* pack lq color from tid_data along the reduced txp */ 1834 ba_info->status.status_driver_data[0] = 1835 RS_DRV_DATA_PACK(tid_data->lq_color, 1836 ba_info->status.status_driver_data[0]); 1837 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1838 1839 skb_queue_walk(&reclaimed_skbs, skb) { 1840 struct ieee80211_hdr *hdr = (void *)skb->data; 1841 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1842 1843 if (ieee80211_is_data_qos(hdr->frame_control)) 1844 freed++; 1845 else 1846 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1847 1848 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1849 1850 memset(&info->status, 0, sizeof(info->status)); 1851 /* Packet was transmitted successfully, failures come as single 1852 * frames because before failing a frame the firmware transmits 1853 * it without aggregation at least once. 1854 */ 1855 info->flags |= IEEE80211_TX_STAT_ACK; 1856 1857 /* this is the first skb we deliver in this batch */ 1858 /* put the rate scaling data there */ 1859 if (freed == 1) { 1860 info->flags |= IEEE80211_TX_STAT_AMPDU; 1861 memcpy(&info->status, &ba_info->status, 1862 sizeof(ba_info->status)); 1863 iwl_mvm_hwrate_to_tx_status(rate, info); 1864 } 1865 } 1866 1867 spin_unlock_bh(&mvmsta->lock); 1868 1869 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1870 * possible (i.e. first MPDU in the aggregation wasn't acked) 1871 * Still it's important to update RS about sent vs. acked. 1872 */ 1873 if (skb_queue_empty(&reclaimed_skbs)) { 1874 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1875 1876 if (mvmsta->vif) 1877 chanctx_conf = 1878 rcu_dereference(mvmsta->vif->chanctx_conf); 1879 1880 if (WARN_ON_ONCE(!chanctx_conf)) 1881 goto out; 1882 1883 ba_info->band = chanctx_conf->def.chan->band; 1884 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1885 1886 if (!iwl_mvm_has_tlc_offload(mvm)) { 1887 IWL_DEBUG_TX_REPLY(mvm, 1888 "No reclaim. Update rs directly\n"); 1889 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1890 } 1891 } 1892 1893 out: 1894 rcu_read_unlock(); 1895 1896 while (!skb_queue_empty(&reclaimed_skbs)) { 1897 skb = __skb_dequeue(&reclaimed_skbs); 1898 ieee80211_tx_status(mvm->hw, skb); 1899 } 1900 } 1901 1902 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1903 { 1904 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1905 int sta_id, tid, txq, index; 1906 struct ieee80211_tx_info ba_info = {}; 1907 struct iwl_mvm_ba_notif *ba_notif; 1908 struct iwl_mvm_tid_data *tid_data; 1909 struct iwl_mvm_sta *mvmsta; 1910 1911 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1912 1913 if (iwl_mvm_has_new_tx_api(mvm)) { 1914 struct iwl_mvm_compressed_ba_notif *ba_res = 1915 (void *)pkt->data; 1916 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 1917 int i; 1918 1919 sta_id = ba_res->sta_id; 1920 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1921 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1922 ba_info.status.tx_time = 1923 (u16)le32_to_cpu(ba_res->wireless_time); 1924 ba_info.status.status_driver_data[0] = 1925 (void *)(uintptr_t)ba_res->reduced_txp; 1926 1927 if (!le16_to_cpu(ba_res->tfd_cnt)) 1928 goto out; 1929 1930 rcu_read_lock(); 1931 1932 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1933 if (!mvmsta) 1934 goto out_unlock; 1935 1936 /* Free per TID */ 1937 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { 1938 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1939 &ba_res->tfd[i]; 1940 1941 tid = ba_tfd->tid; 1942 if (tid == IWL_MGMT_TID) 1943 tid = IWL_MAX_TID_COUNT; 1944 1945 mvmsta->tid_data[i].lq_color = lq_color; 1946 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 1947 (int)(le16_to_cpu(ba_tfd->q_num)), 1948 le16_to_cpu(ba_tfd->tfd_index), 1949 &ba_info, 1950 le32_to_cpu(ba_res->tx_rate)); 1951 } 1952 1953 iwl_mvm_tx_airtime(mvm, mvmsta, 1954 le32_to_cpu(ba_res->wireless_time)); 1955 out_unlock: 1956 rcu_read_unlock(); 1957 out: 1958 IWL_DEBUG_TX_REPLY(mvm, 1959 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1960 sta_id, le32_to_cpu(ba_res->flags), 1961 le16_to_cpu(ba_res->txed), 1962 le16_to_cpu(ba_res->done)); 1963 return; 1964 } 1965 1966 ba_notif = (void *)pkt->data; 1967 sta_id = ba_notif->sta_id; 1968 tid = ba_notif->tid; 1969 /* "flow" corresponds to Tx queue */ 1970 txq = le16_to_cpu(ba_notif->scd_flow); 1971 /* "ssn" is start of block-ack Tx window, corresponds to index 1972 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1973 index = le16_to_cpu(ba_notif->scd_ssn); 1974 1975 rcu_read_lock(); 1976 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1977 if (WARN_ON_ONCE(!mvmsta)) { 1978 rcu_read_unlock(); 1979 return; 1980 } 1981 1982 tid_data = &mvmsta->tid_data[tid]; 1983 1984 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1985 ba_info.status.ampdu_len = ba_notif->txed; 1986 ba_info.status.tx_time = tid_data->tx_time; 1987 ba_info.status.status_driver_data[0] = 1988 (void *)(uintptr_t)ba_notif->reduced_txp; 1989 1990 rcu_read_unlock(); 1991 1992 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1993 tid_data->rate_n_flags); 1994 1995 IWL_DEBUG_TX_REPLY(mvm, 1996 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1997 ba_notif->sta_addr, ba_notif->sta_id); 1998 1999 IWL_DEBUG_TX_REPLY(mvm, 2000 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 2001 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 2002 le64_to_cpu(ba_notif->bitmap), txq, index, 2003 ba_notif->txed, ba_notif->txed_2_done); 2004 2005 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 2006 ba_notif->reduced_txp); 2007 } 2008 2009 /* 2010 * Note that there are transports that buffer frames before they reach 2011 * the firmware. This means that after flush_tx_path is called, the 2012 * queue might not be empty. The race-free way to handle this is to: 2013 * 1) set the station as draining 2014 * 2) flush the Tx path 2015 * 3) wait for the transport queues to be empty 2016 */ 2017 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 2018 { 2019 int ret; 2020 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2021 .queues_ctl = cpu_to_le32(tfd_msk), 2022 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2023 }; 2024 2025 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2026 2027 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2028 sizeof(flush_cmd), &flush_cmd); 2029 if (ret) 2030 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2031 return ret; 2032 } 2033 2034 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, 2035 u16 tids, u32 flags) 2036 { 2037 int ret; 2038 struct iwl_tx_path_flush_cmd flush_cmd = { 2039 .sta_id = cpu_to_le32(sta_id), 2040 .tid_mask = cpu_to_le16(tids), 2041 }; 2042 2043 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2044 2045 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2046 sizeof(flush_cmd), &flush_cmd); 2047 if (ret) 2048 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2049 return ret; 2050 } 2051 2052 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags) 2053 { 2054 struct iwl_mvm_int_sta *int_sta = sta; 2055 struct iwl_mvm_sta *mvm_sta = sta; 2056 2057 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != 2058 offsetof(struct iwl_mvm_sta, sta_id)); 2059 2060 if (iwl_mvm_has_new_tx_api(mvm)) 2061 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 2062 0xffff, flags); 2063 2064 if (internal) 2065 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 2066 flags); 2067 2068 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags); 2069 } 2070