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 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 345 if (info->band == NL80211_BAND_5GHZ) 346 rate_idx += IWL_FIRST_OFDM_RATE; 347 348 /* For 2.4 GHZ band, check that there is no need to remap */ 349 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 350 351 /* Get PLCP rate for tx_cmd->rate_n_flags */ 352 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 353 354 /* Set CCK flag as needed */ 355 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 356 rate_flags |= RATE_MCS_CCK_MSK; 357 358 return (u32)rate_plcp | rate_flags; 359 } 360 361 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 362 struct ieee80211_tx_info *info, 363 struct ieee80211_sta *sta, __le16 fc) 364 { 365 return iwl_mvm_get_tx_rate(mvm, info, sta) | 366 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 367 } 368 369 /* 370 * Sets the fields in the Tx cmd that are rate related 371 */ 372 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 373 struct ieee80211_tx_info *info, 374 struct ieee80211_sta *sta, __le16 fc) 375 { 376 /* Set retry limit on RTS packets */ 377 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 378 379 /* Set retry limit on DATA packets and Probe Responses*/ 380 if (ieee80211_is_probe_resp(fc)) { 381 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 382 tx_cmd->rts_retry_limit = 383 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 384 } else if (ieee80211_is_back_req(fc)) { 385 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 386 } else { 387 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 388 } 389 390 /* 391 * for data packets, rate info comes from the table inside the fw. This 392 * table is controlled by LINK_QUALITY commands 393 */ 394 395 if (ieee80211_is_data(fc) && sta) { 396 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 397 398 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 399 tx_cmd->initial_rate_index = 0; 400 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 401 return; 402 } 403 } else if (ieee80211_is_back_req(fc)) { 404 tx_cmd->tx_flags |= 405 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 406 } 407 408 /* Set the rate in the TX cmd */ 409 tx_cmd->rate_n_flags = 410 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 411 } 412 413 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 414 u8 *crypto_hdr) 415 { 416 struct ieee80211_key_conf *keyconf = info->control.hw_key; 417 u64 pn; 418 419 pn = atomic64_inc_return(&keyconf->tx_pn); 420 crypto_hdr[0] = pn; 421 crypto_hdr[2] = 0; 422 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 423 crypto_hdr[1] = pn >> 8; 424 crypto_hdr[4] = pn >> 16; 425 crypto_hdr[5] = pn >> 24; 426 crypto_hdr[6] = pn >> 32; 427 crypto_hdr[7] = pn >> 40; 428 } 429 430 /* 431 * Sets the fields in the Tx cmd that are crypto related 432 */ 433 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 434 struct ieee80211_tx_info *info, 435 struct iwl_tx_cmd *tx_cmd, 436 struct sk_buff *skb_frag, 437 int hdrlen) 438 { 439 struct ieee80211_key_conf *keyconf = info->control.hw_key; 440 u8 *crypto_hdr = skb_frag->data + hdrlen; 441 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 442 u64 pn; 443 444 switch (keyconf->cipher) { 445 case WLAN_CIPHER_SUITE_CCMP: 446 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 447 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 448 break; 449 450 case WLAN_CIPHER_SUITE_TKIP: 451 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 452 pn = atomic64_inc_return(&keyconf->tx_pn); 453 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 454 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 455 break; 456 457 case WLAN_CIPHER_SUITE_WEP104: 458 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 459 /* fall through */ 460 case WLAN_CIPHER_SUITE_WEP40: 461 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 462 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 463 TX_CMD_SEC_WEP_KEY_IDX_MSK); 464 465 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 466 break; 467 case WLAN_CIPHER_SUITE_GCMP: 468 case WLAN_CIPHER_SUITE_GCMP_256: 469 type = TX_CMD_SEC_GCMP; 470 /* Fall through */ 471 case WLAN_CIPHER_SUITE_CCMP_256: 472 /* TODO: Taking the key from the table might introduce a race 473 * when PTK rekeying is done, having an old packets with a PN 474 * based on the old key but the message encrypted with a new 475 * one. 476 * Need to handle this. 477 */ 478 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 479 tx_cmd->key[0] = keyconf->hw_key_idx; 480 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 481 break; 482 default: 483 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 484 } 485 } 486 487 /* 488 * Allocates and sets the Tx cmd the driver data pointers in the skb 489 */ 490 static struct iwl_device_cmd * 491 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 492 struct ieee80211_tx_info *info, int hdrlen, 493 struct ieee80211_sta *sta, u8 sta_id) 494 { 495 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 496 struct iwl_device_cmd *dev_cmd; 497 struct iwl_tx_cmd *tx_cmd; 498 499 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 500 501 if (unlikely(!dev_cmd)) 502 return NULL; 503 504 /* Make sure we zero enough of dev_cmd */ 505 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd)); 506 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) > sizeof(*tx_cmd)); 507 508 memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd)); 509 dev_cmd->hdr.cmd = TX_CMD; 510 511 if (iwl_mvm_has_new_tx_api(mvm)) { 512 u16 offload_assist = 0; 513 u32 rate_n_flags = 0; 514 u16 flags = 0; 515 struct iwl_mvm_sta *mvmsta = sta ? 516 iwl_mvm_sta_from_mac80211(sta) : NULL; 517 518 if (ieee80211_is_data_qos(hdr->frame_control)) { 519 u8 *qc = ieee80211_get_qos_ctl(hdr); 520 521 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 522 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 523 } 524 525 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, 526 offload_assist); 527 528 /* padding is inserted later in transport */ 529 if (ieee80211_hdrlen(hdr->frame_control) % 4 && 530 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 531 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 532 533 if (!info->control.hw_key) 534 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 535 536 /* 537 * For data packets rate info comes from the fw. Only 538 * set rate/antenna during connection establishment or in case 539 * no station is given. 540 */ 541 if (!sta || !ieee80211_is_data(hdr->frame_control) || 542 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 543 flags |= IWL_TX_FLAGS_CMD_RATE; 544 rate_n_flags = 545 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 546 hdr->frame_control); 547 } 548 549 if (mvm->trans->cfg->device_family >= 550 IWL_DEVICE_FAMILY_22560) { 551 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 552 553 cmd->offload_assist |= cpu_to_le32(offload_assist); 554 555 /* Total # bytes to be transmitted */ 556 cmd->len = cpu_to_le16((u16)skb->len); 557 558 /* Copy MAC header from skb into command buffer */ 559 memcpy(cmd->hdr, hdr, hdrlen); 560 561 cmd->flags = cpu_to_le16(flags); 562 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 563 } else { 564 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 565 566 cmd->offload_assist |= cpu_to_le16(offload_assist); 567 568 /* Total # bytes to be transmitted */ 569 cmd->len = cpu_to_le16((u16)skb->len); 570 571 /* Copy MAC header from skb into command buffer */ 572 memcpy(cmd->hdr, hdr, hdrlen); 573 574 cmd->flags = cpu_to_le32(flags); 575 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 576 } 577 goto out; 578 } 579 580 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 581 582 if (info->control.hw_key) 583 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 584 585 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 586 587 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 588 589 /* Copy MAC header from skb into command buffer */ 590 memcpy(tx_cmd->hdr, hdr, hdrlen); 591 592 out: 593 return dev_cmd; 594 } 595 596 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 597 struct iwl_device_cmd *cmd) 598 { 599 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 600 601 memset(&skb_info->status, 0, sizeof(skb_info->status)); 602 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 603 604 skb_info->driver_data[1] = cmd; 605 } 606 607 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 608 struct ieee80211_tx_info *info, 609 struct ieee80211_hdr *hdr) 610 { 611 struct iwl_mvm_vif *mvmvif = 612 iwl_mvm_vif_from_mac80211(info->control.vif); 613 __le16 fc = hdr->frame_control; 614 615 switch (info->control.vif->type) { 616 case NL80211_IFTYPE_AP: 617 case NL80211_IFTYPE_ADHOC: 618 /* 619 * Non-bufferable frames use the broadcast station, thus they 620 * use the probe queue. 621 * Also take care of the case where we send a deauth to a 622 * station that we don't have, or similarly an association 623 * response (with non-success status) for a station we can't 624 * accept. 625 * Also, disassociate frames might happen, particular with 626 * reason 7 ("Class 3 frame received from nonassociated STA"). 627 */ 628 if (ieee80211_is_mgmt(fc) && 629 (!ieee80211_is_bufferable_mmpdu(fc) || 630 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 631 return mvm->probe_queue; 632 633 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 634 is_multicast_ether_addr(hdr->addr1)) 635 return mvmvif->cab_queue; 636 637 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 638 "fc=0x%02x", le16_to_cpu(fc)); 639 return mvm->probe_queue; 640 case NL80211_IFTYPE_P2P_DEVICE: 641 if (ieee80211_is_mgmt(fc)) 642 return mvm->p2p_dev_queue; 643 644 WARN_ON_ONCE(1); 645 return mvm->p2p_dev_queue; 646 default: 647 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 648 return -1; 649 } 650 } 651 652 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 653 struct sk_buff *skb) 654 { 655 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 656 struct iwl_mvm_vif *mvmvif = 657 iwl_mvm_vif_from_mac80211(info->control.vif); 658 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 659 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 660 struct iwl_probe_resp_data *resp_data; 661 u8 *ie, *pos; 662 u8 match[] = { 663 (WLAN_OUI_WFA >> 16) & 0xff, 664 (WLAN_OUI_WFA >> 8) & 0xff, 665 WLAN_OUI_WFA & 0xff, 666 WLAN_OUI_TYPE_WFA_P2P, 667 }; 668 669 rcu_read_lock(); 670 671 resp_data = rcu_dereference(mvmvif->probe_resp_data); 672 if (!resp_data) 673 goto out; 674 675 if (!resp_data->notif.noa_active) 676 goto out; 677 678 ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 679 mgmt->u.probe_resp.variable, 680 skb->len - base_len, 681 match, 4, 2); 682 if (!ie) { 683 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 684 goto out; 685 } 686 687 if (skb_tailroom(skb) < resp_data->noa_len) { 688 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 689 IWL_ERR(mvm, 690 "Failed to reallocate probe resp\n"); 691 goto out; 692 } 693 } 694 695 pos = skb_put(skb, resp_data->noa_len); 696 697 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 698 /* Set length of IE body (not including ID and length itself) */ 699 *pos++ = resp_data->noa_len - 2; 700 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 701 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 702 *pos++ = WLAN_OUI_WFA & 0xff; 703 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 704 705 memcpy(pos, &resp_data->notif.noa_attr, 706 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 707 708 out: 709 rcu_read_unlock(); 710 } 711 712 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 713 { 714 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 715 struct ieee80211_tx_info info; 716 struct iwl_device_cmd *dev_cmd; 717 u8 sta_id; 718 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 719 __le16 fc = hdr->frame_control; 720 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 721 IEEE80211_TX_CTL_TX_OFFCHAN; 722 int queue = -1; 723 724 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 725 return -1; 726 727 memcpy(&info, skb->cb, sizeof(info)); 728 729 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 730 return -1; 731 732 if (info.control.vif) { 733 struct iwl_mvm_vif *mvmvif = 734 iwl_mvm_vif_from_mac80211(info.control.vif); 735 736 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 737 info.control.vif->type == NL80211_IFTYPE_AP || 738 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 739 if (!ieee80211_is_data(hdr->frame_control)) 740 sta_id = mvmvif->bcast_sta.sta_id; 741 else 742 sta_id = mvmvif->mcast_sta.sta_id; 743 744 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr); 745 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 746 queue = mvm->snif_queue; 747 sta_id = mvm->snif_sta.sta_id; 748 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 749 offchannel) { 750 /* 751 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 752 * that can be used in 2 different types of vifs, P2P & 753 * STATION. 754 * P2P uses the offchannel queue. 755 * STATION (HS2.0) uses the auxiliary context of the FW, 756 * and hence needs to be sent on the aux queue. 757 */ 758 sta_id = mvm->aux_sta.sta_id; 759 queue = mvm->aux_queue; 760 } 761 } 762 763 if (queue < 0) { 764 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 765 return -1; 766 } 767 768 if (unlikely(ieee80211_is_probe_resp(fc))) 769 iwl_mvm_probe_resp_set_noa(mvm, skb); 770 771 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 772 773 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 774 if (!dev_cmd) 775 return -1; 776 777 /* From now on, we cannot access info->control */ 778 iwl_mvm_skb_prepare_status(skb, dev_cmd); 779 780 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 781 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 782 return -1; 783 } 784 785 return 0; 786 } 787 788 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 789 struct ieee80211_sta *sta, unsigned int tid) 790 { 791 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 792 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band; 793 u8 ac = tid_to_mac80211_ac[tid]; 794 unsigned int txf; 795 int lmac = IWL_LMAC_24G_INDEX; 796 797 if (iwl_mvm_is_cdb_supported(mvm) && 798 band == NL80211_BAND_5GHZ) 799 lmac = IWL_LMAC_5G_INDEX; 800 801 /* For HE redirect to trigger based fifos */ 802 if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 803 ac += 4; 804 805 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 806 807 /* 808 * Don't send an AMSDU that will be longer than the TXF. 809 * Add a security margin of 256 for the TX command + headers. 810 * We also want to have the start of the next packet inside the 811 * fifo to be able to send bursts. 812 */ 813 return min_t(unsigned int, mvmsta->max_amsdu_len, 814 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 815 } 816 817 #ifdef CONFIG_INET 818 819 static int 820 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 821 netdev_features_t netdev_flags, 822 struct sk_buff_head *mpdus_skb) 823 { 824 struct sk_buff *tmp, *next; 825 struct ieee80211_hdr *hdr = (void *)skb->data; 826 char cb[sizeof(skb->cb)]; 827 u16 i = 0; 828 unsigned int tcp_payload_len; 829 unsigned int mss = skb_shinfo(skb)->gso_size; 830 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 831 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 832 833 skb_shinfo(skb)->gso_size = num_subframes * mss; 834 memcpy(cb, skb->cb, sizeof(cb)); 835 836 next = skb_gso_segment(skb, netdev_flags); 837 skb_shinfo(skb)->gso_size = mss; 838 if (WARN_ON_ONCE(IS_ERR(next))) 839 return -EINVAL; 840 else if (next) 841 consume_skb(skb); 842 843 while (next) { 844 tmp = next; 845 next = tmp->next; 846 847 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 } else { 864 if (ieee80211_is_data_qos(hdr->frame_control)) { 865 u8 *qc; 866 867 if (ipv4) 868 ip_send_check(ip_hdr(tmp)); 869 870 qc = ieee80211_get_qos_ctl((void *)tmp->data); 871 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 872 } 873 skb_shinfo(tmp)->gso_size = 0; 874 } 875 876 tmp->prev = NULL; 877 tmp->next = NULL; 878 879 __skb_queue_tail(mpdus_skb, tmp); 880 i++; 881 } 882 883 return 0; 884 } 885 886 static 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 unsigned int dbg_max_amsdu_len; 897 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 898 u8 tid; 899 900 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 901 tcp_hdrlen(skb); 902 903 dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len); 904 905 if (!mvmsta->max_amsdu_len || 906 !ieee80211_is_data_qos(hdr->frame_control) || 907 (!mvmsta->amsdu_enabled && !dbg_max_amsdu_len)) 908 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 909 910 /* 911 * Do not build AMSDU for IPv6 with extension headers. 912 * ask stack to segment and checkum the generated MPDUs for us. 913 */ 914 if (skb->protocol == htons(ETH_P_IPV6) && 915 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 916 IPPROTO_TCP) { 917 netdev_flags &= ~NETIF_F_CSUM_MASK; 918 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 919 } 920 921 tid = ieee80211_get_tid(hdr); 922 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 923 return -EINVAL; 924 925 /* 926 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 927 * during an BA session. 928 */ 929 if (info->flags & IEEE80211_TX_CTL_AMPDU && 930 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) 931 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 932 933 if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) || 934 !(mvmsta->amsdu_enabled & BIT(tid))) 935 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 936 937 max_amsdu_len = iwl_mvm_max_amsdu_size(mvm, sta, tid); 938 939 if (unlikely(dbg_max_amsdu_len)) 940 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 941 dbg_max_amsdu_len); 942 943 /* 944 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 945 * supported. This is a spec requirement (IEEE 802.11-2015 946 * section 8.7.3 NOTE 3). 947 */ 948 if (info->flags & IEEE80211_TX_CTL_AMPDU && 949 !sta->vht_cap.vht_supported) 950 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 951 952 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 953 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 954 pad = (4 - subf_len) & 0x3; 955 956 /* 957 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 958 * N * subf_len + (N - 1) * pad. 959 */ 960 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 961 962 if (sta->max_amsdu_subframes && 963 num_subframes > sta->max_amsdu_subframes) 964 num_subframes = sta->max_amsdu_subframes; 965 966 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 967 tcp_hdrlen(skb) + skb->data_len; 968 969 /* 970 * Make sure we have enough TBs for the A-MSDU: 971 * 2 for each subframe 972 * 1 more for each fragment 973 * 1 more for the potential data in the header 974 */ 975 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 976 mvm->trans->max_skb_frags) 977 num_subframes = 1; 978 979 if (num_subframes > 1) 980 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 981 982 /* This skb fits in one single A-MSDU */ 983 if (num_subframes * mss >= tcp_payload_len) { 984 __skb_queue_tail(mpdus_skb, skb); 985 return 0; 986 } 987 988 /* 989 * Trick the segmentation function to make it 990 * create SKBs that can fit into one A-MSDU. 991 */ 992 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 993 mpdus_skb); 994 } 995 #else /* CONFIG_INET */ 996 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 997 struct ieee80211_tx_info *info, 998 struct ieee80211_sta *sta, 999 struct sk_buff_head *mpdus_skb) 1000 { 1001 /* Impossible to get TSO with CONFIG_INET */ 1002 WARN_ON(1); 1003 1004 return -1; 1005 } 1006 #endif 1007 1008 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1009 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1010 { 1011 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1012 unsigned long now = jiffies; 1013 int tid; 1014 1015 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1016 return false; 1017 1018 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1019 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1020 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1021 return true; 1022 } 1023 1024 return false; 1025 } 1026 1027 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1028 struct iwl_mvm_sta *mvmsta, 1029 int airtime) 1030 { 1031 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1032 struct iwl_mvm_tcm_mac *mdata; 1033 1034 if (mac >= NUM_MAC_INDEX_DRIVER) 1035 return; 1036 1037 mdata = &mvm->tcm.data[mac]; 1038 1039 if (mvm->tcm.paused) 1040 return; 1041 1042 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1043 schedule_delayed_work(&mvm->tcm.work, 0); 1044 1045 mdata->tx.airtime += airtime; 1046 } 1047 1048 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1049 struct iwl_mvm_sta *mvmsta, int tid) 1050 { 1051 u32 ac = tid_to_mac80211_ac[tid]; 1052 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1053 struct iwl_mvm_tcm_mac *mdata; 1054 1055 if (mac >= NUM_MAC_INDEX_DRIVER) 1056 return -EINVAL; 1057 1058 mdata = &mvm->tcm.data[mac]; 1059 1060 mdata->tx.pkts[ac]++; 1061 1062 return 0; 1063 } 1064 1065 /* 1066 * Sets the fields in the Tx cmd that are crypto related 1067 */ 1068 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1069 struct ieee80211_tx_info *info, 1070 struct ieee80211_sta *sta) 1071 { 1072 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1073 struct iwl_mvm_sta *mvmsta; 1074 struct iwl_device_cmd *dev_cmd; 1075 __le16 fc; 1076 u16 seq_number = 0; 1077 u8 tid = IWL_MAX_TID_COUNT; 1078 u16 txq_id; 1079 bool is_ampdu = false; 1080 int hdrlen; 1081 1082 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1083 fc = hdr->frame_control; 1084 hdrlen = ieee80211_hdrlen(fc); 1085 1086 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) 1087 return -1; 1088 1089 if (WARN_ON_ONCE(!mvmsta)) 1090 return -1; 1091 1092 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 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 0; 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\n", mvmsta->sta_id, 1174 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 1175 1176 /* From now on, we cannot access info->control */ 1177 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1178 1179 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1180 goto drop_unlock_sta; 1181 1182 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1183 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1184 1185 spin_unlock(&mvmsta->lock); 1186 1187 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1188 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1189 goto drop; 1190 1191 return 0; 1192 1193 drop_unlock_sta: 1194 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1195 spin_unlock(&mvmsta->lock); 1196 drop: 1197 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid); 1198 return -1; 1199 } 1200 1201 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 1202 struct ieee80211_sta *sta) 1203 { 1204 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1205 struct ieee80211_tx_info info; 1206 struct sk_buff_head mpdus_skbs; 1207 unsigned int payload_len; 1208 int ret; 1209 1210 if (WARN_ON_ONCE(!mvmsta)) 1211 return -1; 1212 1213 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1214 return -1; 1215 1216 memcpy(&info, skb->cb, sizeof(info)); 1217 1218 if (!skb_is_gso(skb)) 1219 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1220 1221 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1222 tcp_hdrlen(skb) + skb->data_len; 1223 1224 if (payload_len <= skb_shinfo(skb)->gso_size) 1225 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1226 1227 __skb_queue_head_init(&mpdus_skbs); 1228 1229 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1230 if (ret) 1231 return ret; 1232 1233 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1234 return ret; 1235 1236 while (!skb_queue_empty(&mpdus_skbs)) { 1237 skb = __skb_dequeue(&mpdus_skbs); 1238 1239 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1240 if (ret) { 1241 __skb_queue_purge(&mpdus_skbs); 1242 return ret; 1243 } 1244 } 1245 1246 return 0; 1247 } 1248 1249 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1250 struct ieee80211_sta *sta, u8 tid) 1251 { 1252 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1253 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1254 struct ieee80211_vif *vif = mvmsta->vif; 1255 u16 normalized_ssn; 1256 1257 lockdep_assert_held(&mvmsta->lock); 1258 1259 if ((tid_data->state == IWL_AGG_ON || 1260 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1261 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1262 /* 1263 * Now that this aggregation or DQA queue is empty tell 1264 * mac80211 so it knows we no longer have frames buffered for 1265 * the station on this TID (for the TIM bitmap calculation.) 1266 */ 1267 ieee80211_sta_set_buffered(sta, tid, false); 1268 } 1269 1270 /* 1271 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1272 * to align the wrap around of ssn so we compare relevant values. 1273 */ 1274 normalized_ssn = tid_data->ssn; 1275 if (mvm->trans->cfg->gen2) 1276 normalized_ssn &= 0xff; 1277 1278 if (normalized_ssn != tid_data->next_reclaimed) 1279 return; 1280 1281 switch (tid_data->state) { 1282 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1283 IWL_DEBUG_TX_QUEUES(mvm, 1284 "Can continue addBA flow ssn = next_recl = %d\n", 1285 tid_data->next_reclaimed); 1286 tid_data->state = IWL_AGG_STARTING; 1287 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1288 break; 1289 1290 case IWL_EMPTYING_HW_QUEUE_DELBA: 1291 IWL_DEBUG_TX_QUEUES(mvm, 1292 "Can continue DELBA flow ssn = next_recl = %d\n", 1293 tid_data->next_reclaimed); 1294 tid_data->state = IWL_AGG_OFF; 1295 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1296 break; 1297 1298 default: 1299 break; 1300 } 1301 } 1302 1303 #ifdef CONFIG_IWLWIFI_DEBUG 1304 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1305 { 1306 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1307 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1308 1309 switch (status & TX_STATUS_MSK) { 1310 case TX_STATUS_SUCCESS: 1311 return "SUCCESS"; 1312 TX_STATUS_POSTPONE(DELAY); 1313 TX_STATUS_POSTPONE(FEW_BYTES); 1314 TX_STATUS_POSTPONE(BT_PRIO); 1315 TX_STATUS_POSTPONE(QUIET_PERIOD); 1316 TX_STATUS_POSTPONE(CALC_TTAK); 1317 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1318 TX_STATUS_FAIL(SHORT_LIMIT); 1319 TX_STATUS_FAIL(LONG_LIMIT); 1320 TX_STATUS_FAIL(UNDERRUN); 1321 TX_STATUS_FAIL(DRAIN_FLOW); 1322 TX_STATUS_FAIL(RFKILL_FLUSH); 1323 TX_STATUS_FAIL(LIFE_EXPIRE); 1324 TX_STATUS_FAIL(DEST_PS); 1325 TX_STATUS_FAIL(HOST_ABORTED); 1326 TX_STATUS_FAIL(BT_RETRY); 1327 TX_STATUS_FAIL(STA_INVALID); 1328 TX_STATUS_FAIL(FRAG_DROPPED); 1329 TX_STATUS_FAIL(TID_DISABLE); 1330 TX_STATUS_FAIL(FIFO_FLUSHED); 1331 TX_STATUS_FAIL(SMALL_CF_POLL); 1332 TX_STATUS_FAIL(FW_DROP); 1333 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1334 } 1335 1336 return "UNKNOWN"; 1337 1338 #undef TX_STATUS_FAIL 1339 #undef TX_STATUS_POSTPONE 1340 } 1341 #endif /* CONFIG_IWLWIFI_DEBUG */ 1342 1343 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1344 enum nl80211_band band, 1345 struct ieee80211_tx_rate *r) 1346 { 1347 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1348 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1349 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1350 case RATE_MCS_CHAN_WIDTH_20: 1351 break; 1352 case RATE_MCS_CHAN_WIDTH_40: 1353 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1354 break; 1355 case RATE_MCS_CHAN_WIDTH_80: 1356 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1357 break; 1358 case RATE_MCS_CHAN_WIDTH_160: 1359 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1360 break; 1361 } 1362 if (rate_n_flags & RATE_MCS_SGI_MSK) 1363 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1364 if (rate_n_flags & RATE_MCS_HT_MSK) { 1365 r->flags |= IEEE80211_TX_RC_MCS; 1366 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1367 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1368 ieee80211_rate_set_vht( 1369 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1370 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1371 RATE_VHT_MCS_NSS_POS) + 1); 1372 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1373 } else { 1374 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1375 band); 1376 } 1377 } 1378 1379 /** 1380 * translate ucode response to mac80211 tx status control values 1381 */ 1382 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1383 struct ieee80211_tx_info *info) 1384 { 1385 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1386 1387 info->status.antenna = 1388 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1389 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1390 } 1391 1392 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1393 u32 status) 1394 { 1395 struct iwl_fw_dbg_trigger_tlv *trig; 1396 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1397 int i; 1398 1399 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1400 FW_DBG_TRIGGER_TX_STATUS); 1401 if (!trig) 1402 return; 1403 1404 status_trig = (void *)trig->data; 1405 1406 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1407 /* don't collect on status 0 */ 1408 if (!status_trig->statuses[i].status) 1409 break; 1410 1411 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1412 continue; 1413 1414 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1415 "Tx status %d was received", 1416 status & TX_STATUS_MSK); 1417 break; 1418 } 1419 } 1420 1421 /** 1422 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1423 * @tx_resp: the Tx response from the fw (agg or non-agg) 1424 * 1425 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1426 * it can't know that everything will go well until the end of the AMPDU, it 1427 * can't know in advance the number of MPDUs that will be sent in the current 1428 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1429 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1430 * of the batch. This is why the SSN of the SCD is written at the end of the 1431 * whole struct at a variable offset. This function knows how to cope with the 1432 * variable offset and returns the SSN of the SCD. 1433 */ 1434 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1435 struct iwl_mvm_tx_resp *tx_resp) 1436 { 1437 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1438 tx_resp->frame_count) & 0xfff; 1439 } 1440 1441 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1442 struct iwl_rx_packet *pkt) 1443 { 1444 struct ieee80211_sta *sta; 1445 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1446 int txq_id = SEQ_TO_QUEUE(sequence); 1447 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1448 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1449 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1450 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1451 struct agg_tx_status *agg_status = 1452 iwl_mvm_get_agg_status(mvm, tx_resp); 1453 u32 status = le16_to_cpu(agg_status->status); 1454 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1455 struct sk_buff_head skbs; 1456 u8 skb_freed = 0; 1457 u8 lq_color; 1458 u16 next_reclaimed, seq_ctl; 1459 bool is_ndp = false; 1460 1461 __skb_queue_head_init(&skbs); 1462 1463 if (iwl_mvm_has_new_tx_api(mvm)) 1464 txq_id = le16_to_cpu(tx_resp->tx_queue); 1465 1466 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1467 1468 /* we can free until ssn % q.n_bd not inclusive */ 1469 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1470 1471 while (!skb_queue_empty(&skbs)) { 1472 struct sk_buff *skb = __skb_dequeue(&skbs); 1473 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1474 struct ieee80211_hdr *hdr = (void *)skb->data; 1475 bool flushed = false; 1476 1477 skb_freed++; 1478 1479 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1480 1481 memset(&info->status, 0, sizeof(info->status)); 1482 1483 /* inform mac80211 about what happened with the frame */ 1484 switch (status & TX_STATUS_MSK) { 1485 case TX_STATUS_SUCCESS: 1486 case TX_STATUS_DIRECT_DONE: 1487 info->flags |= IEEE80211_TX_STAT_ACK; 1488 break; 1489 case TX_STATUS_FAIL_FIFO_FLUSHED: 1490 case TX_STATUS_FAIL_DRAIN_FLOW: 1491 flushed = true; 1492 break; 1493 case TX_STATUS_FAIL_DEST_PS: 1494 /* the FW should have stopped the queue and not 1495 * return this status 1496 */ 1497 WARN_ON(1); 1498 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1499 break; 1500 default: 1501 break; 1502 } 1503 1504 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1505 ieee80211_is_mgmt(hdr->frame_control)) 1506 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1507 1508 /* 1509 * If we are freeing multiple frames, mark all the frames 1510 * but the first one as acked, since they were acknowledged 1511 * before 1512 * */ 1513 if (skb_freed > 1) 1514 info->flags |= IEEE80211_TX_STAT_ACK; 1515 1516 iwl_mvm_tx_status_check_trigger(mvm, status); 1517 1518 info->status.rates[0].count = tx_resp->failure_frame + 1; 1519 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1520 info); 1521 info->status.status_driver_data[1] = 1522 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1523 1524 /* Single frame failure in an AMPDU queue => send BAR */ 1525 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1526 !(info->flags & IEEE80211_TX_STAT_ACK) && 1527 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1528 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1529 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1530 1531 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1532 if (ieee80211_is_back_req(hdr->frame_control)) 1533 seq_ctl = 0; 1534 else if (status != TX_STATUS_SUCCESS) 1535 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1536 1537 if (unlikely(!seq_ctl)) { 1538 struct ieee80211_hdr *hdr = (void *)skb->data; 1539 1540 /* 1541 * If it is an NDP, we can't update next_reclaim since 1542 * its sequence control is 0. Note that for that same 1543 * reason, NDPs are never sent to A-MPDU'able queues 1544 * so that we can never have more than one freed frame 1545 * for a single Tx resonse (see WARN_ON below). 1546 */ 1547 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1548 is_ndp = true; 1549 } 1550 1551 /* 1552 * TODO: this is not accurate if we are freeing more than one 1553 * packet. 1554 */ 1555 info->status.tx_time = 1556 le16_to_cpu(tx_resp->wireless_media_time); 1557 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1558 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1559 info->status.status_driver_data[0] = 1560 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1561 1562 ieee80211_tx_status(mvm->hw, skb); 1563 } 1564 1565 /* This is an aggregation queue or might become one, so we use 1566 * the ssn since: ssn = wifi seq_num % 256. 1567 * The seq_ctl is the sequence control of the packet to which 1568 * this Tx response relates. But if there is a hole in the 1569 * bitmap of the BA we received, this Tx response may allow to 1570 * reclaim the hole and all the subsequent packets that were 1571 * already acked. In that case, seq_ctl != ssn, and the next 1572 * packet to be reclaimed will be ssn and not seq_ctl. In that 1573 * case, several packets will be reclaimed even if 1574 * frame_count = 1. 1575 * 1576 * The ssn is the index (% 256) of the latest packet that has 1577 * treated (acked / dropped) + 1. 1578 */ 1579 next_reclaimed = ssn; 1580 1581 IWL_DEBUG_TX_REPLY(mvm, 1582 "TXQ %d status %s (0x%08x)\n", 1583 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1584 1585 IWL_DEBUG_TX_REPLY(mvm, 1586 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1587 le32_to_cpu(tx_resp->initial_rate), 1588 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1589 ssn, next_reclaimed, seq_ctl); 1590 1591 rcu_read_lock(); 1592 1593 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1594 /* 1595 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1596 * the firmware while we still have packets for it in the Tx queues. 1597 */ 1598 if (WARN_ON_ONCE(!sta)) 1599 goto out; 1600 1601 if (!IS_ERR(sta)) { 1602 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1603 1604 iwl_mvm_tx_airtime(mvm, mvmsta, 1605 le16_to_cpu(tx_resp->wireless_media_time)); 1606 1607 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1608 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1609 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1610 1611 if (sta->wme && tid != IWL_MGMT_TID) { 1612 struct iwl_mvm_tid_data *tid_data = 1613 &mvmsta->tid_data[tid]; 1614 bool send_eosp_ndp = false; 1615 1616 spin_lock_bh(&mvmsta->lock); 1617 1618 if (!is_ndp) { 1619 tid_data->next_reclaimed = next_reclaimed; 1620 IWL_DEBUG_TX_REPLY(mvm, 1621 "Next reclaimed packet:%d\n", 1622 next_reclaimed); 1623 } else { 1624 IWL_DEBUG_TX_REPLY(mvm, 1625 "NDP - don't update next_reclaimed\n"); 1626 } 1627 1628 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1629 1630 if (mvmsta->sleep_tx_count) { 1631 mvmsta->sleep_tx_count--; 1632 if (mvmsta->sleep_tx_count && 1633 !iwl_mvm_tid_queued(mvm, tid_data)) { 1634 /* 1635 * The number of frames in the queue 1636 * dropped to 0 even if we sent less 1637 * frames than we thought we had on the 1638 * Tx queue. 1639 * This means we had holes in the BA 1640 * window that we just filled, ask 1641 * mac80211 to send EOSP since the 1642 * firmware won't know how to do that. 1643 * Send NDP and the firmware will send 1644 * EOSP notification that will trigger 1645 * a call to ieee80211_sta_eosp(). 1646 */ 1647 send_eosp_ndp = true; 1648 } 1649 } 1650 1651 spin_unlock_bh(&mvmsta->lock); 1652 if (send_eosp_ndp) { 1653 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1654 IEEE80211_FRAME_RELEASE_UAPSD, 1655 1, tid, false, false); 1656 mvmsta->sleep_tx_count = 0; 1657 ieee80211_send_eosp_nullfunc(sta, tid); 1658 } 1659 } 1660 1661 if (mvmsta->next_status_eosp) { 1662 mvmsta->next_status_eosp = false; 1663 ieee80211_sta_eosp(sta); 1664 } 1665 } 1666 out: 1667 rcu_read_unlock(); 1668 } 1669 1670 #ifdef CONFIG_IWLWIFI_DEBUG 1671 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1672 static const char *iwl_get_agg_tx_status(u16 status) 1673 { 1674 switch (status & AGG_TX_STATE_STATUS_MSK) { 1675 AGG_TX_STATE_(TRANSMITTED); 1676 AGG_TX_STATE_(UNDERRUN); 1677 AGG_TX_STATE_(BT_PRIO); 1678 AGG_TX_STATE_(FEW_BYTES); 1679 AGG_TX_STATE_(ABORT); 1680 AGG_TX_STATE_(TX_ON_AIR_DROP); 1681 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1682 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1683 AGG_TX_STATE_(SCD_QUERY); 1684 AGG_TX_STATE_(TEST_BAD_CRC32); 1685 AGG_TX_STATE_(RESPONSE); 1686 AGG_TX_STATE_(DUMP_TX); 1687 AGG_TX_STATE_(DELAY_TX); 1688 } 1689 1690 return "UNKNOWN"; 1691 } 1692 1693 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1694 struct iwl_rx_packet *pkt) 1695 { 1696 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1697 struct agg_tx_status *frame_status = 1698 iwl_mvm_get_agg_status(mvm, tx_resp); 1699 int i; 1700 1701 for (i = 0; i < tx_resp->frame_count; i++) { 1702 u16 fstatus = le16_to_cpu(frame_status[i].status); 1703 1704 IWL_DEBUG_TX_REPLY(mvm, 1705 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1706 iwl_get_agg_tx_status(fstatus), 1707 fstatus & AGG_TX_STATE_STATUS_MSK, 1708 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1709 AGG_TX_STATE_TRY_CNT_POS, 1710 le16_to_cpu(frame_status[i].sequence)); 1711 } 1712 } 1713 #else 1714 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1715 struct iwl_rx_packet *pkt) 1716 {} 1717 #endif /* CONFIG_IWLWIFI_DEBUG */ 1718 1719 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1720 struct iwl_rx_packet *pkt) 1721 { 1722 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1723 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1724 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1725 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1726 struct iwl_mvm_sta *mvmsta; 1727 int queue = SEQ_TO_QUEUE(sequence); 1728 struct ieee80211_sta *sta; 1729 1730 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1731 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1732 return; 1733 1734 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1735 1736 rcu_read_lock(); 1737 1738 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1739 1740 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1741 if (WARN_ON_ONCE(!sta || !sta->wme)) { 1742 rcu_read_unlock(); 1743 return; 1744 } 1745 1746 if (!WARN_ON_ONCE(!mvmsta)) { 1747 mvmsta->tid_data[tid].rate_n_flags = 1748 le32_to_cpu(tx_resp->initial_rate); 1749 mvmsta->tid_data[tid].tx_time = 1750 le16_to_cpu(tx_resp->wireless_media_time); 1751 mvmsta->tid_data[tid].lq_color = 1752 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1753 iwl_mvm_tx_airtime(mvm, mvmsta, 1754 le16_to_cpu(tx_resp->wireless_media_time)); 1755 } 1756 1757 rcu_read_unlock(); 1758 } 1759 1760 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1761 { 1762 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1763 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1764 1765 if (tx_resp->frame_count == 1) 1766 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1767 else 1768 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1769 } 1770 1771 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1772 int txq, int index, 1773 struct ieee80211_tx_info *ba_info, u32 rate) 1774 { 1775 struct sk_buff_head reclaimed_skbs; 1776 struct iwl_mvm_tid_data *tid_data; 1777 struct ieee80211_sta *sta; 1778 struct iwl_mvm_sta *mvmsta; 1779 struct sk_buff *skb; 1780 int freed; 1781 1782 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1783 tid > IWL_MAX_TID_COUNT, 1784 "sta_id %d tid %d", sta_id, tid)) 1785 return; 1786 1787 rcu_read_lock(); 1788 1789 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1790 1791 /* Reclaiming frames for a station that has been deleted ? */ 1792 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1793 rcu_read_unlock(); 1794 return; 1795 } 1796 1797 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1798 tid_data = &mvmsta->tid_data[tid]; 1799 1800 if (tid_data->txq_id != txq) { 1801 IWL_ERR(mvm, 1802 "invalid BA notification: Q %d, tid %d\n", 1803 tid_data->txq_id, tid); 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 spin_lock_bh(&mvmsta->lock); 1818 1819 tid_data->next_reclaimed = index; 1820 1821 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1822 1823 freed = 0; 1824 1825 /* pack lq color from tid_data along the reduced txp */ 1826 ba_info->status.status_driver_data[0] = 1827 RS_DRV_DATA_PACK(tid_data->lq_color, 1828 ba_info->status.status_driver_data[0]); 1829 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1830 1831 skb_queue_walk(&reclaimed_skbs, skb) { 1832 struct ieee80211_hdr *hdr = (void *)skb->data; 1833 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1834 1835 if (ieee80211_is_data_qos(hdr->frame_control)) 1836 freed++; 1837 else 1838 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1839 1840 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1841 1842 memset(&info->status, 0, sizeof(info->status)); 1843 /* Packet was transmitted successfully, failures come as single 1844 * frames because before failing a frame the firmware transmits 1845 * it without aggregation at least once. 1846 */ 1847 info->flags |= IEEE80211_TX_STAT_ACK; 1848 1849 /* this is the first skb we deliver in this batch */ 1850 /* put the rate scaling data there */ 1851 if (freed == 1) { 1852 info->flags |= IEEE80211_TX_STAT_AMPDU; 1853 memcpy(&info->status, &ba_info->status, 1854 sizeof(ba_info->status)); 1855 iwl_mvm_hwrate_to_tx_status(rate, info); 1856 } 1857 } 1858 1859 spin_unlock_bh(&mvmsta->lock); 1860 1861 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1862 * possible (i.e. first MPDU in the aggregation wasn't acked) 1863 * Still it's important to update RS about sent vs. acked. 1864 */ 1865 if (skb_queue_empty(&reclaimed_skbs)) { 1866 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1867 1868 if (mvmsta->vif) 1869 chanctx_conf = 1870 rcu_dereference(mvmsta->vif->chanctx_conf); 1871 1872 if (WARN_ON_ONCE(!chanctx_conf)) 1873 goto out; 1874 1875 ba_info->band = chanctx_conf->def.chan->band; 1876 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1877 1878 if (!iwl_mvm_has_tlc_offload(mvm)) { 1879 IWL_DEBUG_TX_REPLY(mvm, 1880 "No reclaim. Update rs directly\n"); 1881 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1882 } 1883 } 1884 1885 out: 1886 rcu_read_unlock(); 1887 1888 while (!skb_queue_empty(&reclaimed_skbs)) { 1889 skb = __skb_dequeue(&reclaimed_skbs); 1890 ieee80211_tx_status(mvm->hw, skb); 1891 } 1892 } 1893 1894 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1895 { 1896 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1897 int sta_id, tid, txq, index; 1898 struct ieee80211_tx_info ba_info = {}; 1899 struct iwl_mvm_ba_notif *ba_notif; 1900 struct iwl_mvm_tid_data *tid_data; 1901 struct iwl_mvm_sta *mvmsta; 1902 1903 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1904 1905 if (iwl_mvm_has_new_tx_api(mvm)) { 1906 struct iwl_mvm_compressed_ba_notif *ba_res = 1907 (void *)pkt->data; 1908 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 1909 int i; 1910 1911 sta_id = ba_res->sta_id; 1912 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1913 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1914 ba_info.status.tx_time = 1915 (u16)le32_to_cpu(ba_res->wireless_time); 1916 ba_info.status.status_driver_data[0] = 1917 (void *)(uintptr_t)ba_res->reduced_txp; 1918 1919 if (!le16_to_cpu(ba_res->tfd_cnt)) 1920 goto out; 1921 1922 rcu_read_lock(); 1923 1924 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1925 if (!mvmsta) 1926 goto out_unlock; 1927 1928 /* Free per TID */ 1929 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { 1930 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1931 &ba_res->tfd[i]; 1932 1933 tid = ba_tfd->tid; 1934 if (tid == IWL_MGMT_TID) 1935 tid = IWL_MAX_TID_COUNT; 1936 1937 mvmsta->tid_data[i].lq_color = lq_color; 1938 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 1939 (int)(le16_to_cpu(ba_tfd->q_num)), 1940 le16_to_cpu(ba_tfd->tfd_index), 1941 &ba_info, 1942 le32_to_cpu(ba_res->tx_rate)); 1943 } 1944 1945 iwl_mvm_tx_airtime(mvm, mvmsta, 1946 le32_to_cpu(ba_res->wireless_time)); 1947 out_unlock: 1948 rcu_read_unlock(); 1949 out: 1950 IWL_DEBUG_TX_REPLY(mvm, 1951 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1952 sta_id, le32_to_cpu(ba_res->flags), 1953 le16_to_cpu(ba_res->txed), 1954 le16_to_cpu(ba_res->done)); 1955 return; 1956 } 1957 1958 ba_notif = (void *)pkt->data; 1959 sta_id = ba_notif->sta_id; 1960 tid = ba_notif->tid; 1961 /* "flow" corresponds to Tx queue */ 1962 txq = le16_to_cpu(ba_notif->scd_flow); 1963 /* "ssn" is start of block-ack Tx window, corresponds to index 1964 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1965 index = le16_to_cpu(ba_notif->scd_ssn); 1966 1967 rcu_read_lock(); 1968 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1969 if (WARN_ON_ONCE(!mvmsta)) { 1970 rcu_read_unlock(); 1971 return; 1972 } 1973 1974 tid_data = &mvmsta->tid_data[tid]; 1975 1976 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1977 ba_info.status.ampdu_len = ba_notif->txed; 1978 ba_info.status.tx_time = tid_data->tx_time; 1979 ba_info.status.status_driver_data[0] = 1980 (void *)(uintptr_t)ba_notif->reduced_txp; 1981 1982 rcu_read_unlock(); 1983 1984 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1985 tid_data->rate_n_flags); 1986 1987 IWL_DEBUG_TX_REPLY(mvm, 1988 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1989 ba_notif->sta_addr, ba_notif->sta_id); 1990 1991 IWL_DEBUG_TX_REPLY(mvm, 1992 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1993 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1994 le64_to_cpu(ba_notif->bitmap), txq, index, 1995 ba_notif->txed, ba_notif->txed_2_done); 1996 1997 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1998 ba_notif->reduced_txp); 1999 } 2000 2001 /* 2002 * Note that there are transports that buffer frames before they reach 2003 * the firmware. This means that after flush_tx_path is called, the 2004 * queue might not be empty. The race-free way to handle this is to: 2005 * 1) set the station as draining 2006 * 2) flush the Tx path 2007 * 3) wait for the transport queues to be empty 2008 */ 2009 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 2010 { 2011 int ret; 2012 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2013 .queues_ctl = cpu_to_le32(tfd_msk), 2014 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2015 }; 2016 2017 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2018 2019 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2020 sizeof(flush_cmd), &flush_cmd); 2021 if (ret) 2022 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2023 return ret; 2024 } 2025 2026 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, 2027 u16 tids, u32 flags) 2028 { 2029 int ret; 2030 struct iwl_tx_path_flush_cmd flush_cmd = { 2031 .sta_id = cpu_to_le32(sta_id), 2032 .tid_mask = cpu_to_le16(tids), 2033 }; 2034 2035 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2036 2037 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2038 sizeof(flush_cmd), &flush_cmd); 2039 if (ret) 2040 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2041 return ret; 2042 } 2043 2044 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags) 2045 { 2046 struct iwl_mvm_int_sta *int_sta = sta; 2047 struct iwl_mvm_sta *mvm_sta = sta; 2048 2049 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != 2050 offsetof(struct iwl_mvm_sta, sta_id)); 2051 2052 if (iwl_mvm_has_new_tx_api(mvm)) 2053 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 2054 0xff | BIT(IWL_MGMT_TID), flags); 2055 2056 if (internal) 2057 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 2058 flags); 2059 2060 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags); 2061 } 2062