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 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 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 tx_flags |= TX_CMD_FLG_ACK; 214 else 215 tx_flags &= ~TX_CMD_FLG_ACK; 216 217 if (ieee80211_is_probe_resp(fc)) 218 tx_flags |= TX_CMD_FLG_TSF; 219 220 if (ieee80211_has_morefrags(fc)) 221 tx_flags |= TX_CMD_FLG_MORE_FRAG; 222 223 if (ieee80211_is_data_qos(fc)) { 224 u8 *qc = ieee80211_get_qos_ctl(hdr); 225 tx_cmd->tid_tspec = qc[0] & 0xf; 226 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 227 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 228 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 229 } else if (ieee80211_is_back_req(fc)) { 230 struct ieee80211_bar *bar = (void *)skb->data; 231 u16 control = le16_to_cpu(bar->control); 232 u16 ssn = le16_to_cpu(bar->start_seq_num); 233 234 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 235 tx_cmd->tid_tspec = (control & 236 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 237 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 238 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 239 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 240 ssn); 241 } else { 242 if (ieee80211_is_data(fc)) 243 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 244 else 245 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT; 246 247 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 248 tx_flags |= TX_CMD_FLG_SEQ_CTL; 249 else 250 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 251 } 252 253 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */ 254 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 255 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 256 else 257 ac = tid_to_mac80211_ac[0]; 258 259 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 260 TX_CMD_FLG_BT_PRIO_POS; 261 262 if (ieee80211_is_mgmt(fc)) { 263 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 264 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 265 else if (ieee80211_is_action(fc)) 266 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 267 else 268 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 269 270 /* The spec allows Action frames in A-MPDU, we don't support 271 * it 272 */ 273 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 274 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 275 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 276 } else { 277 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 278 } 279 280 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 281 !is_multicast_ether_addr(ieee80211_get_DA(hdr))) 282 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 283 284 if (fw_has_capa(&mvm->fw->ucode_capa, 285 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 286 ieee80211_action_contains_tpc(skb)) 287 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 288 289 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 290 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 291 tx_cmd->len = cpu_to_le16((u16)skb->len); 292 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 293 tx_cmd->sta_id = sta_id; 294 295 /* padding is inserted later in transport */ 296 if (ieee80211_hdrlen(fc) % 4 && 297 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 298 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 299 300 tx_cmd->offload_assist |= 301 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info, 302 offload_assist)); 303 } 304 305 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm, 306 struct ieee80211_tx_info *info, 307 struct ieee80211_sta *sta, __le16 fc) 308 { 309 if (info->band == NL80211_BAND_2GHZ && 310 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 311 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 312 313 if (sta && ieee80211_is_data(fc)) { 314 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 315 316 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS; 317 } 318 319 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 320 } 321 322 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 323 struct ieee80211_tx_info *info, 324 struct ieee80211_sta *sta) 325 { 326 int rate_idx; 327 u8 rate_plcp; 328 u32 rate_flags = 0; 329 330 /* HT rate doesn't make sense for a non data frame */ 331 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, 332 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n", 333 info->control.rates[0].flags, 334 info->control.rates[0].idx); 335 336 rate_idx = info->control.rates[0].idx; 337 /* if the rate isn't a well known legacy rate, take the lowest one */ 338 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 339 rate_idx = rate_lowest_index( 340 &mvm->nvm_data->bands[info->band], sta); 341 342 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 343 if (info->band == NL80211_BAND_5GHZ) 344 rate_idx += IWL_FIRST_OFDM_RATE; 345 346 /* For 2.4 GHZ band, check that there is no need to remap */ 347 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 348 349 /* Get PLCP rate for tx_cmd->rate_n_flags */ 350 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 351 352 /* Set CCK flag as needed */ 353 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 354 rate_flags |= RATE_MCS_CCK_MSK; 355 356 return (u32)rate_plcp | rate_flags; 357 } 358 359 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm, 360 struct ieee80211_tx_info *info, 361 struct ieee80211_sta *sta, __le16 fc) 362 { 363 return iwl_mvm_get_tx_rate(mvm, info, sta) | 364 iwl_mvm_get_tx_ant(mvm, info, sta, fc); 365 } 366 367 /* 368 * Sets the fields in the Tx cmd that are rate related 369 */ 370 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 371 struct ieee80211_tx_info *info, 372 struct ieee80211_sta *sta, __le16 fc) 373 { 374 /* Set retry limit on RTS packets */ 375 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 376 377 /* Set retry limit on DATA packets and Probe Responses*/ 378 if (ieee80211_is_probe_resp(fc)) { 379 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 380 tx_cmd->rts_retry_limit = 381 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 382 } else if (ieee80211_is_back_req(fc)) { 383 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 384 } else { 385 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 386 } 387 388 /* 389 * for data packets, rate info comes from the table inside the fw. This 390 * table is controlled by LINK_QUALITY commands 391 */ 392 393 if (ieee80211_is_data(fc) && sta) { 394 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 395 396 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) { 397 tx_cmd->initial_rate_index = 0; 398 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 399 return; 400 } 401 } else if (ieee80211_is_back_req(fc)) { 402 tx_cmd->tx_flags |= 403 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 404 } 405 406 /* Set the rate in the TX cmd */ 407 tx_cmd->rate_n_flags = 408 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc)); 409 } 410 411 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 412 u8 *crypto_hdr) 413 { 414 struct ieee80211_key_conf *keyconf = info->control.hw_key; 415 u64 pn; 416 417 pn = atomic64_inc_return(&keyconf->tx_pn); 418 crypto_hdr[0] = pn; 419 crypto_hdr[2] = 0; 420 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 421 crypto_hdr[1] = pn >> 8; 422 crypto_hdr[4] = pn >> 16; 423 crypto_hdr[5] = pn >> 24; 424 crypto_hdr[6] = pn >> 32; 425 crypto_hdr[7] = pn >> 40; 426 } 427 428 /* 429 * Sets the fields in the Tx cmd that are crypto related 430 */ 431 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 432 struct ieee80211_tx_info *info, 433 struct iwl_tx_cmd *tx_cmd, 434 struct sk_buff *skb_frag, 435 int hdrlen) 436 { 437 struct ieee80211_key_conf *keyconf = info->control.hw_key; 438 u8 *crypto_hdr = skb_frag->data + hdrlen; 439 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 440 u64 pn; 441 442 switch (keyconf->cipher) { 443 case WLAN_CIPHER_SUITE_CCMP: 444 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 445 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 446 break; 447 448 case WLAN_CIPHER_SUITE_TKIP: 449 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 450 pn = atomic64_inc_return(&keyconf->tx_pn); 451 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 452 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 453 break; 454 455 case WLAN_CIPHER_SUITE_WEP104: 456 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 457 /* fall through */ 458 case WLAN_CIPHER_SUITE_WEP40: 459 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 460 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 461 TX_CMD_SEC_WEP_KEY_IDX_MSK); 462 463 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 464 break; 465 case WLAN_CIPHER_SUITE_GCMP: 466 case WLAN_CIPHER_SUITE_GCMP_256: 467 type = TX_CMD_SEC_GCMP; 468 /* Fall through */ 469 case WLAN_CIPHER_SUITE_CCMP_256: 470 /* TODO: Taking the key from the table might introduce a race 471 * when PTK rekeying is done, having an old packets with a PN 472 * based on the old key but the message encrypted with a new 473 * one. 474 * Need to handle this. 475 */ 476 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 477 tx_cmd->key[0] = keyconf->hw_key_idx; 478 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 479 break; 480 default: 481 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 482 } 483 } 484 485 /* 486 * Allocates and sets the Tx cmd the driver data pointers in the skb 487 */ 488 static struct iwl_device_cmd * 489 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 490 struct ieee80211_tx_info *info, int hdrlen, 491 struct ieee80211_sta *sta, u8 sta_id) 492 { 493 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 494 struct iwl_device_cmd *dev_cmd; 495 struct iwl_tx_cmd *tx_cmd; 496 497 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 498 499 if (unlikely(!dev_cmd)) 500 return NULL; 501 502 /* Make sure we zero enough of dev_cmd */ 503 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd)); 504 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) > sizeof(*tx_cmd)); 505 506 memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd)); 507 dev_cmd->hdr.cmd = TX_CMD; 508 509 if (iwl_mvm_has_new_tx_api(mvm)) { 510 u16 offload_assist = 0; 511 u32 rate_n_flags = 0; 512 u16 flags = 0; 513 struct iwl_mvm_sta *mvmsta = sta ? 514 iwl_mvm_sta_from_mac80211(sta) : NULL; 515 516 if (ieee80211_is_data_qos(hdr->frame_control)) { 517 u8 *qc = ieee80211_get_qos_ctl(hdr); 518 519 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 520 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 521 } 522 523 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, 524 offload_assist); 525 526 /* padding is inserted later in transport */ 527 if (ieee80211_hdrlen(hdr->frame_control) % 4 && 528 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 529 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 530 531 if (!info->control.hw_key) 532 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 533 534 /* 535 * For data packets rate info comes from the fw. Only 536 * set rate/antenna during connection establishment or in case 537 * no station is given. 538 */ 539 if (!sta || !ieee80211_is_data(hdr->frame_control) || 540 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) { 541 flags |= IWL_TX_FLAGS_CMD_RATE; 542 rate_n_flags = 543 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, 544 hdr->frame_control); 545 } 546 547 if (mvm->trans->cfg->device_family >= 548 IWL_DEVICE_FAMILY_22560) { 549 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 550 551 cmd->offload_assist |= cpu_to_le32(offload_assist); 552 553 /* Total # bytes to be transmitted */ 554 cmd->len = cpu_to_le16((u16)skb->len); 555 556 /* Copy MAC header from skb into command buffer */ 557 memcpy(cmd->hdr, hdr, hdrlen); 558 559 cmd->flags = cpu_to_le16(flags); 560 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 561 } else { 562 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 563 564 cmd->offload_assist |= cpu_to_le16(offload_assist); 565 566 /* Total # bytes to be transmitted */ 567 cmd->len = cpu_to_le16((u16)skb->len); 568 569 /* Copy MAC header from skb into command buffer */ 570 memcpy(cmd->hdr, hdr, hdrlen); 571 572 cmd->flags = cpu_to_le32(flags); 573 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 574 } 575 goto out; 576 } 577 578 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 579 580 if (info->control.hw_key) 581 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 582 583 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 584 585 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 586 587 /* Copy MAC header from skb into command buffer */ 588 memcpy(tx_cmd->hdr, hdr, hdrlen); 589 590 out: 591 return dev_cmd; 592 } 593 594 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 595 struct iwl_device_cmd *cmd) 596 { 597 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 598 599 memset(&skb_info->status, 0, sizeof(skb_info->status)); 600 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 601 602 skb_info->driver_data[1] = cmd; 603 } 604 605 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 606 struct ieee80211_tx_info *info, 607 struct ieee80211_hdr *hdr) 608 { 609 struct iwl_mvm_vif *mvmvif = 610 iwl_mvm_vif_from_mac80211(info->control.vif); 611 __le16 fc = hdr->frame_control; 612 613 switch (info->control.vif->type) { 614 case NL80211_IFTYPE_AP: 615 case NL80211_IFTYPE_ADHOC: 616 /* 617 * Non-bufferable frames use the broadcast station, thus they 618 * use the probe queue. 619 * Also take care of the case where we send a deauth to a 620 * station that we don't have, or similarly an association 621 * response (with non-success status) for a station we can't 622 * accept. 623 * Also, disassociate frames might happen, particular with 624 * reason 7 ("Class 3 frame received from nonassociated STA"). 625 */ 626 if (ieee80211_is_mgmt(fc) && 627 (!ieee80211_is_bufferable_mmpdu(fc) || 628 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 629 return mvm->probe_queue; 630 631 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) && 632 is_multicast_ether_addr(hdr->addr1)) 633 return mvmvif->cab_queue; 634 635 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 636 "fc=0x%02x", le16_to_cpu(fc)); 637 return mvm->probe_queue; 638 case NL80211_IFTYPE_P2P_DEVICE: 639 if (ieee80211_is_mgmt(fc)) 640 return mvm->p2p_dev_queue; 641 642 WARN_ON_ONCE(1); 643 return mvm->p2p_dev_queue; 644 default: 645 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 646 return -1; 647 } 648 } 649 650 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 651 struct sk_buff *skb) 652 { 653 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 654 struct iwl_mvm_vif *mvmvif = 655 iwl_mvm_vif_from_mac80211(info->control.vif); 656 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 657 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 658 struct iwl_probe_resp_data *resp_data; 659 u8 *ie, *pos; 660 u8 match[] = { 661 (WLAN_OUI_WFA >> 16) & 0xff, 662 (WLAN_OUI_WFA >> 8) & 0xff, 663 WLAN_OUI_WFA & 0xff, 664 WLAN_OUI_TYPE_WFA_P2P, 665 }; 666 667 rcu_read_lock(); 668 669 resp_data = rcu_dereference(mvmvif->probe_resp_data); 670 if (!resp_data) 671 goto out; 672 673 if (!resp_data->notif.noa_active) 674 goto out; 675 676 ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 677 mgmt->u.probe_resp.variable, 678 skb->len - base_len, 679 match, 4, 2); 680 if (!ie) { 681 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 682 goto out; 683 } 684 685 if (skb_tailroom(skb) < resp_data->noa_len) { 686 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 687 IWL_ERR(mvm, 688 "Failed to reallocate probe resp\n"); 689 goto out; 690 } 691 } 692 693 pos = skb_put(skb, resp_data->noa_len); 694 695 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 696 /* Set length of IE body (not including ID and length itself) */ 697 *pos++ = resp_data->noa_len - 2; 698 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 699 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 700 *pos++ = WLAN_OUI_WFA & 0xff; 701 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 702 703 memcpy(pos, &resp_data->notif.noa_attr, 704 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 705 706 out: 707 rcu_read_unlock(); 708 } 709 710 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 711 { 712 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 713 struct ieee80211_tx_info info; 714 struct iwl_device_cmd *dev_cmd; 715 u8 sta_id; 716 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 717 __le16 fc = hdr->frame_control; 718 bool offchannel = IEEE80211_SKB_CB(skb)->flags & 719 IEEE80211_TX_CTL_TX_OFFCHAN; 720 int queue = -1; 721 722 memcpy(&info, skb->cb, sizeof(info)); 723 724 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 725 return -1; 726 727 if (info.control.vif) { 728 struct iwl_mvm_vif *mvmvif = 729 iwl_mvm_vif_from_mac80211(info.control.vif); 730 731 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 732 info.control.vif->type == NL80211_IFTYPE_AP || 733 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 734 if (!ieee80211_is_data(hdr->frame_control)) 735 sta_id = mvmvif->bcast_sta.sta_id; 736 else 737 sta_id = mvmvif->mcast_sta.sta_id; 738 739 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr); 740 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 741 queue = mvm->snif_queue; 742 sta_id = mvm->snif_sta.sta_id; 743 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 744 offchannel) { 745 /* 746 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets 747 * that can be used in 2 different types of vifs, P2P & 748 * STATION. 749 * P2P uses the offchannel queue. 750 * STATION (HS2.0) uses the auxiliary context of the FW, 751 * and hence needs to be sent on the aux queue. 752 */ 753 sta_id = mvm->aux_sta.sta_id; 754 queue = mvm->aux_queue; 755 } 756 } 757 758 if (queue < 0) { 759 IWL_ERR(mvm, "No queue was found. Dropping TX\n"); 760 return -1; 761 } 762 763 if (unlikely(ieee80211_is_probe_resp(fc))) 764 iwl_mvm_probe_resp_set_noa(mvm, skb); 765 766 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 767 768 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 769 if (!dev_cmd) 770 return -1; 771 772 /* From now on, we cannot access info->control */ 773 iwl_mvm_skb_prepare_status(skb, dev_cmd); 774 775 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 776 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 777 return -1; 778 } 779 780 return 0; 781 } 782 783 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 784 struct ieee80211_sta *sta, unsigned int tid) 785 { 786 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 787 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band; 788 u8 ac = tid_to_mac80211_ac[tid]; 789 unsigned int txf; 790 int lmac = IWL_LMAC_24G_INDEX; 791 792 if (iwl_mvm_is_cdb_supported(mvm) && 793 band == NL80211_BAND_5GHZ) 794 lmac = IWL_LMAC_5G_INDEX; 795 796 /* For HE redirect to trigger based fifos */ 797 if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 798 ac += 4; 799 800 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 801 802 /* 803 * Don't send an AMSDU that will be longer than the TXF. 804 * Add a security margin of 256 for the TX command + headers. 805 * We also want to have the start of the next packet inside the 806 * fifo to be able to send bursts. 807 */ 808 return min_t(unsigned int, mvmsta->max_amsdu_len, 809 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 810 } 811 812 #ifdef CONFIG_INET 813 814 static int 815 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 816 netdev_features_t netdev_flags, 817 struct sk_buff_head *mpdus_skb) 818 { 819 struct sk_buff *tmp, *next; 820 struct ieee80211_hdr *hdr = (void *)skb->data; 821 char cb[sizeof(skb->cb)]; 822 u16 i = 0; 823 unsigned int tcp_payload_len; 824 unsigned int mss = skb_shinfo(skb)->gso_size; 825 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 826 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 827 828 skb_shinfo(skb)->gso_size = num_subframes * mss; 829 memcpy(cb, skb->cb, sizeof(cb)); 830 831 next = skb_gso_segment(skb, netdev_flags); 832 skb_shinfo(skb)->gso_size = mss; 833 if (WARN_ON_ONCE(IS_ERR(next))) 834 return -EINVAL; 835 else if (next) 836 consume_skb(skb); 837 838 while (next) { 839 tmp = next; 840 next = tmp->next; 841 842 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 843 /* 844 * Compute the length of all the data added for the A-MSDU. 845 * This will be used to compute the length to write in the TX 846 * command. We have: SNAP + IP + TCP for n -1 subframes and 847 * ETH header for n subframes. 848 */ 849 tcp_payload_len = skb_tail_pointer(tmp) - 850 skb_transport_header(tmp) - 851 tcp_hdrlen(tmp) + tmp->data_len; 852 853 if (ipv4) 854 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 855 856 if (tcp_payload_len > mss) { 857 skb_shinfo(tmp)->gso_size = mss; 858 } else { 859 if (ieee80211_is_data_qos(hdr->frame_control)) { 860 u8 *qc; 861 862 if (ipv4) 863 ip_send_check(ip_hdr(tmp)); 864 865 qc = ieee80211_get_qos_ctl((void *)tmp->data); 866 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 867 } 868 skb_shinfo(tmp)->gso_size = 0; 869 } 870 871 tmp->prev = NULL; 872 tmp->next = NULL; 873 874 __skb_queue_tail(mpdus_skb, tmp); 875 i++; 876 } 877 878 return 0; 879 } 880 881 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 882 struct ieee80211_tx_info *info, 883 struct ieee80211_sta *sta, 884 struct sk_buff_head *mpdus_skb) 885 { 886 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 887 struct ieee80211_hdr *hdr = (void *)skb->data; 888 unsigned int mss = skb_shinfo(skb)->gso_size; 889 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 890 u16 snap_ip_tcp, pad; 891 unsigned int dbg_max_amsdu_len; 892 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 893 u8 tid; 894 895 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 896 tcp_hdrlen(skb); 897 898 dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len); 899 900 if (!mvmsta->max_amsdu_len || 901 !ieee80211_is_data_qos(hdr->frame_control) || 902 (!mvmsta->amsdu_enabled && !dbg_max_amsdu_len)) 903 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 904 905 /* 906 * Do not build AMSDU for IPv6 with extension headers. 907 * ask stack to segment and checkum the generated MPDUs for us. 908 */ 909 if (skb->protocol == htons(ETH_P_IPV6) && 910 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 911 IPPROTO_TCP) { 912 netdev_flags &= ~NETIF_F_CSUM_MASK; 913 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 914 } 915 916 tid = ieee80211_get_tid(hdr); 917 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 918 return -EINVAL; 919 920 /* 921 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 922 * during an BA session. 923 */ 924 if (info->flags & IEEE80211_TX_CTL_AMPDU && 925 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) 926 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 927 928 if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) || 929 !(mvmsta->amsdu_enabled & BIT(tid))) 930 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 931 932 max_amsdu_len = iwl_mvm_max_amsdu_size(mvm, sta, tid); 933 934 if (unlikely(dbg_max_amsdu_len)) 935 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 936 dbg_max_amsdu_len); 937 938 /* 939 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 940 * supported. This is a spec requirement (IEEE 802.11-2015 941 * section 8.7.3 NOTE 3). 942 */ 943 if (info->flags & IEEE80211_TX_CTL_AMPDU && 944 !sta->vht_cap.vht_supported) 945 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 946 947 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 948 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 949 pad = (4 - subf_len) & 0x3; 950 951 /* 952 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 953 * N * subf_len + (N - 1) * pad. 954 */ 955 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 956 957 if (sta->max_amsdu_subframes && 958 num_subframes > sta->max_amsdu_subframes) 959 num_subframes = sta->max_amsdu_subframes; 960 961 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 962 tcp_hdrlen(skb) + skb->data_len; 963 964 /* 965 * Make sure we have enough TBs for the A-MSDU: 966 * 2 for each subframe 967 * 1 more for each fragment 968 * 1 more for the potential data in the header 969 */ 970 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 971 mvm->trans->max_skb_frags) 972 num_subframes = 1; 973 974 if (num_subframes > 1) 975 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 976 977 /* This skb fits in one single A-MSDU */ 978 if (num_subframes * mss >= tcp_payload_len) { 979 __skb_queue_tail(mpdus_skb, skb); 980 return 0; 981 } 982 983 /* 984 * Trick the segmentation function to make it 985 * create SKBs that can fit into one A-MSDU. 986 */ 987 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 988 mpdus_skb); 989 } 990 #else /* CONFIG_INET */ 991 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 992 struct ieee80211_tx_info *info, 993 struct ieee80211_sta *sta, 994 struct sk_buff_head *mpdus_skb) 995 { 996 /* Impossible to get TSO with CONFIG_INET */ 997 WARN_ON(1); 998 999 return -1; 1000 } 1001 #endif 1002 1003 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1004 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1005 { 1006 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1007 unsigned long now = jiffies; 1008 int tid; 1009 1010 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1011 return false; 1012 1013 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1014 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1015 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1016 return true; 1017 } 1018 1019 return false; 1020 } 1021 1022 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1023 struct iwl_mvm_sta *mvmsta, 1024 int airtime) 1025 { 1026 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1027 struct iwl_mvm_tcm_mac *mdata; 1028 1029 if (mac >= NUM_MAC_INDEX_DRIVER) 1030 return; 1031 1032 mdata = &mvm->tcm.data[mac]; 1033 1034 if (mvm->tcm.paused) 1035 return; 1036 1037 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1038 schedule_delayed_work(&mvm->tcm.work, 0); 1039 1040 mdata->tx.airtime += airtime; 1041 } 1042 1043 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1044 struct iwl_mvm_sta *mvmsta, int tid) 1045 { 1046 u32 ac = tid_to_mac80211_ac[tid]; 1047 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1048 struct iwl_mvm_tcm_mac *mdata; 1049 1050 if (mac >= NUM_MAC_INDEX_DRIVER) 1051 return -EINVAL; 1052 1053 mdata = &mvm->tcm.data[mac]; 1054 1055 mdata->tx.pkts[ac]++; 1056 1057 return 0; 1058 } 1059 1060 /* 1061 * Sets the fields in the Tx cmd that are crypto related 1062 */ 1063 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 1064 struct ieee80211_tx_info *info, 1065 struct ieee80211_sta *sta) 1066 { 1067 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1068 struct iwl_mvm_sta *mvmsta; 1069 struct iwl_device_cmd *dev_cmd; 1070 __le16 fc; 1071 u16 seq_number = 0; 1072 u8 tid = IWL_MAX_TID_COUNT; 1073 u16 txq_id; 1074 bool is_ampdu = false; 1075 int hdrlen; 1076 1077 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1078 fc = hdr->frame_control; 1079 hdrlen = ieee80211_hdrlen(fc); 1080 1081 if (WARN_ON_ONCE(!mvmsta)) 1082 return -1; 1083 1084 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1085 return -1; 1086 1087 if (unlikely(ieee80211_is_probe_resp(fc))) 1088 iwl_mvm_probe_resp_set_noa(mvm, skb); 1089 1090 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1091 sta, mvmsta->sta_id); 1092 if (!dev_cmd) 1093 goto drop; 1094 1095 /* 1096 * we handle that entirely ourselves -- for uAPSD the firmware 1097 * will always send a notification, and for PS-Poll responses 1098 * we'll notify mac80211 when getting frame status 1099 */ 1100 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1101 1102 spin_lock(&mvmsta->lock); 1103 1104 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1105 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 1106 * assignment of MGMT TID 1107 */ 1108 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1109 tid = ieee80211_get_tid(hdr); 1110 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 1111 goto drop_unlock_sta; 1112 1113 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1114 if (WARN_ON_ONCE(is_ampdu && 1115 mvmsta->tid_data[tid].state != IWL_AGG_ON)) 1116 goto drop_unlock_sta; 1117 1118 seq_number = mvmsta->tid_data[tid].seq_number; 1119 seq_number &= IEEE80211_SCTL_SEQ; 1120 1121 if (!iwl_mvm_has_new_tx_api(mvm)) { 1122 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1123 1124 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1125 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1126 /* update the tx_cmd hdr as it was already copied */ 1127 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1128 } 1129 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) { 1130 tid = IWL_TID_NON_QOS; 1131 } 1132 1133 txq_id = mvmsta->tid_data[tid].txq_id; 1134 1135 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1136 1137 if (WARN_ON_ONCE(txq_id == IWL_MVM_INVALID_QUEUE)) { 1138 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1139 spin_unlock(&mvmsta->lock); 1140 return 0; 1141 } 1142 1143 if (!iwl_mvm_has_new_tx_api(mvm)) { 1144 /* Keep track of the time of the last frame for this RA/TID */ 1145 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1146 1147 /* 1148 * If we have timed-out TIDs - schedule the worker that will 1149 * reconfig the queues and update them 1150 * 1151 * Note that the no lock is taken here in order to not serialize 1152 * the TX flow. This isn't dangerous because scheduling 1153 * mvm->add_stream_wk can't ruin the state, and if we DON'T 1154 * schedule it due to some race condition then next TX we get 1155 * here we will. 1156 */ 1157 if (unlikely(mvm->queue_info[txq_id].status == 1158 IWL_MVM_QUEUE_SHARED && 1159 iwl_mvm_txq_should_update(mvm, txq_id))) 1160 schedule_work(&mvm->add_stream_wk); 1161 } 1162 1163 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 1164 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 1165 1166 /* From now on, we cannot access info->control */ 1167 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1168 1169 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1170 goto drop_unlock_sta; 1171 1172 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1173 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1174 1175 spin_unlock(&mvmsta->lock); 1176 1177 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, 1178 tid == IWL_MAX_TID_COUNT ? 0 : tid)) 1179 goto drop; 1180 1181 return 0; 1182 1183 drop_unlock_sta: 1184 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1185 spin_unlock(&mvmsta->lock); 1186 drop: 1187 return -1; 1188 } 1189 1190 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 1191 struct ieee80211_sta *sta) 1192 { 1193 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1194 struct ieee80211_tx_info info; 1195 struct sk_buff_head mpdus_skbs; 1196 unsigned int payload_len; 1197 int ret; 1198 1199 if (WARN_ON_ONCE(!mvmsta)) 1200 return -1; 1201 1202 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1203 return -1; 1204 1205 memcpy(&info, skb->cb, sizeof(info)); 1206 1207 if (!skb_is_gso(skb)) 1208 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1209 1210 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1211 tcp_hdrlen(skb) + skb->data_len; 1212 1213 if (payload_len <= skb_shinfo(skb)->gso_size) 1214 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1215 1216 __skb_queue_head_init(&mpdus_skbs); 1217 1218 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1219 if (ret) 1220 return ret; 1221 1222 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1223 return ret; 1224 1225 while (!skb_queue_empty(&mpdus_skbs)) { 1226 skb = __skb_dequeue(&mpdus_skbs); 1227 1228 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1229 if (ret) { 1230 __skb_queue_purge(&mpdus_skbs); 1231 return ret; 1232 } 1233 } 1234 1235 return 0; 1236 } 1237 1238 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1239 struct ieee80211_sta *sta, u8 tid) 1240 { 1241 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1242 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1243 struct ieee80211_vif *vif = mvmsta->vif; 1244 u16 normalized_ssn; 1245 1246 lockdep_assert_held(&mvmsta->lock); 1247 1248 if ((tid_data->state == IWL_AGG_ON || 1249 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1250 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1251 /* 1252 * Now that this aggregation or DQA queue is empty tell 1253 * mac80211 so it knows we no longer have frames buffered for 1254 * the station on this TID (for the TIM bitmap calculation.) 1255 */ 1256 ieee80211_sta_set_buffered(sta, tid, false); 1257 } 1258 1259 /* 1260 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1261 * to align the wrap around of ssn so we compare relevant values. 1262 */ 1263 normalized_ssn = tid_data->ssn; 1264 if (mvm->trans->cfg->gen2) 1265 normalized_ssn &= 0xff; 1266 1267 if (normalized_ssn != tid_data->next_reclaimed) 1268 return; 1269 1270 switch (tid_data->state) { 1271 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1272 IWL_DEBUG_TX_QUEUES(mvm, 1273 "Can continue addBA flow ssn = next_recl = %d\n", 1274 tid_data->next_reclaimed); 1275 tid_data->state = IWL_AGG_STARTING; 1276 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1277 break; 1278 1279 case IWL_EMPTYING_HW_QUEUE_DELBA: 1280 IWL_DEBUG_TX_QUEUES(mvm, 1281 "Can continue DELBA flow ssn = next_recl = %d\n", 1282 tid_data->next_reclaimed); 1283 tid_data->state = IWL_AGG_OFF; 1284 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1285 break; 1286 1287 default: 1288 break; 1289 } 1290 } 1291 1292 #ifdef CONFIG_IWLWIFI_DEBUG 1293 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1294 { 1295 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1296 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1297 1298 switch (status & TX_STATUS_MSK) { 1299 case TX_STATUS_SUCCESS: 1300 return "SUCCESS"; 1301 TX_STATUS_POSTPONE(DELAY); 1302 TX_STATUS_POSTPONE(FEW_BYTES); 1303 TX_STATUS_POSTPONE(BT_PRIO); 1304 TX_STATUS_POSTPONE(QUIET_PERIOD); 1305 TX_STATUS_POSTPONE(CALC_TTAK); 1306 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1307 TX_STATUS_FAIL(SHORT_LIMIT); 1308 TX_STATUS_FAIL(LONG_LIMIT); 1309 TX_STATUS_FAIL(UNDERRUN); 1310 TX_STATUS_FAIL(DRAIN_FLOW); 1311 TX_STATUS_FAIL(RFKILL_FLUSH); 1312 TX_STATUS_FAIL(LIFE_EXPIRE); 1313 TX_STATUS_FAIL(DEST_PS); 1314 TX_STATUS_FAIL(HOST_ABORTED); 1315 TX_STATUS_FAIL(BT_RETRY); 1316 TX_STATUS_FAIL(STA_INVALID); 1317 TX_STATUS_FAIL(FRAG_DROPPED); 1318 TX_STATUS_FAIL(TID_DISABLE); 1319 TX_STATUS_FAIL(FIFO_FLUSHED); 1320 TX_STATUS_FAIL(SMALL_CF_POLL); 1321 TX_STATUS_FAIL(FW_DROP); 1322 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1323 } 1324 1325 return "UNKNOWN"; 1326 1327 #undef TX_STATUS_FAIL 1328 #undef TX_STATUS_POSTPONE 1329 } 1330 #endif /* CONFIG_IWLWIFI_DEBUG */ 1331 1332 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1333 enum nl80211_band band, 1334 struct ieee80211_tx_rate *r) 1335 { 1336 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1337 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1338 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1339 case RATE_MCS_CHAN_WIDTH_20: 1340 break; 1341 case RATE_MCS_CHAN_WIDTH_40: 1342 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1343 break; 1344 case RATE_MCS_CHAN_WIDTH_80: 1345 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1346 break; 1347 case RATE_MCS_CHAN_WIDTH_160: 1348 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1349 break; 1350 } 1351 if (rate_n_flags & RATE_MCS_SGI_MSK) 1352 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1353 if (rate_n_flags & RATE_MCS_HT_MSK) { 1354 r->flags |= IEEE80211_TX_RC_MCS; 1355 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1356 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1357 ieee80211_rate_set_vht( 1358 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1359 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1360 RATE_VHT_MCS_NSS_POS) + 1); 1361 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1362 } else { 1363 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1364 band); 1365 } 1366 } 1367 1368 /** 1369 * translate ucode response to mac80211 tx status control values 1370 */ 1371 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1372 struct ieee80211_tx_info *info) 1373 { 1374 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1375 1376 info->status.antenna = 1377 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1378 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1379 } 1380 1381 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1382 u32 status) 1383 { 1384 struct iwl_fw_dbg_trigger_tlv *trig; 1385 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1386 int i; 1387 1388 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1389 FW_DBG_TRIGGER_TX_STATUS); 1390 if (!trig) 1391 return; 1392 1393 status_trig = (void *)trig->data; 1394 1395 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1396 /* don't collect on status 0 */ 1397 if (!status_trig->statuses[i].status) 1398 break; 1399 1400 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1401 continue; 1402 1403 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1404 "Tx status %d was received", 1405 status & TX_STATUS_MSK); 1406 break; 1407 } 1408 } 1409 1410 /** 1411 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1412 * @tx_resp: the Tx response from the fw (agg or non-agg) 1413 * 1414 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1415 * it can't know that everything will go well until the end of the AMPDU, it 1416 * can't know in advance the number of MPDUs that will be sent in the current 1417 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1418 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1419 * of the batch. This is why the SSN of the SCD is written at the end of the 1420 * whole struct at a variable offset. This function knows how to cope with the 1421 * variable offset and returns the SSN of the SCD. 1422 */ 1423 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1424 struct iwl_mvm_tx_resp *tx_resp) 1425 { 1426 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1427 tx_resp->frame_count) & 0xfff; 1428 } 1429 1430 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1431 struct iwl_rx_packet *pkt) 1432 { 1433 struct ieee80211_sta *sta; 1434 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1435 int txq_id = SEQ_TO_QUEUE(sequence); 1436 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1437 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1438 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1439 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1440 struct agg_tx_status *agg_status = 1441 iwl_mvm_get_agg_status(mvm, tx_resp); 1442 u32 status = le16_to_cpu(agg_status->status); 1443 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1444 struct sk_buff_head skbs; 1445 u8 skb_freed = 0; 1446 u8 lq_color; 1447 u16 next_reclaimed, seq_ctl; 1448 bool is_ndp = false; 1449 1450 __skb_queue_head_init(&skbs); 1451 1452 if (iwl_mvm_has_new_tx_api(mvm)) 1453 txq_id = le16_to_cpu(tx_resp->tx_queue); 1454 1455 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1456 1457 /* we can free until ssn % q.n_bd not inclusive */ 1458 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1459 1460 while (!skb_queue_empty(&skbs)) { 1461 struct sk_buff *skb = __skb_dequeue(&skbs); 1462 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1463 struct ieee80211_hdr *hdr = (void *)skb->data; 1464 bool flushed = false; 1465 1466 skb_freed++; 1467 1468 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1469 1470 memset(&info->status, 0, sizeof(info->status)); 1471 1472 /* inform mac80211 about what happened with the frame */ 1473 switch (status & TX_STATUS_MSK) { 1474 case TX_STATUS_SUCCESS: 1475 case TX_STATUS_DIRECT_DONE: 1476 info->flags |= IEEE80211_TX_STAT_ACK; 1477 break; 1478 case TX_STATUS_FAIL_FIFO_FLUSHED: 1479 case TX_STATUS_FAIL_DRAIN_FLOW: 1480 flushed = true; 1481 break; 1482 case TX_STATUS_FAIL_DEST_PS: 1483 /* the FW should have stopped the queue and not 1484 * return this status 1485 */ 1486 WARN_ON(1); 1487 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1488 break; 1489 default: 1490 break; 1491 } 1492 1493 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1494 ieee80211_is_mgmt(hdr->frame_control)) 1495 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx); 1496 1497 /* 1498 * If we are freeing multiple frames, mark all the frames 1499 * but the first one as acked, since they were acknowledged 1500 * before 1501 * */ 1502 if (skb_freed > 1) 1503 info->flags |= IEEE80211_TX_STAT_ACK; 1504 1505 iwl_mvm_tx_status_check_trigger(mvm, status); 1506 1507 info->status.rates[0].count = tx_resp->failure_frame + 1; 1508 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1509 info); 1510 info->status.status_driver_data[1] = 1511 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1512 1513 /* Single frame failure in an AMPDU queue => send BAR */ 1514 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1515 !(info->flags & IEEE80211_TX_STAT_ACK) && 1516 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1517 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1518 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1519 1520 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1521 if (ieee80211_is_back_req(hdr->frame_control)) 1522 seq_ctl = 0; 1523 else if (status != TX_STATUS_SUCCESS) 1524 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1525 1526 if (unlikely(!seq_ctl)) { 1527 struct ieee80211_hdr *hdr = (void *)skb->data; 1528 1529 /* 1530 * If it is an NDP, we can't update next_reclaim since 1531 * its sequence control is 0. Note that for that same 1532 * reason, NDPs are never sent to A-MPDU'able queues 1533 * so that we can never have more than one freed frame 1534 * for a single Tx resonse (see WARN_ON below). 1535 */ 1536 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1537 is_ndp = true; 1538 } 1539 1540 /* 1541 * TODO: this is not accurate if we are freeing more than one 1542 * packet. 1543 */ 1544 info->status.tx_time = 1545 le16_to_cpu(tx_resp->wireless_media_time); 1546 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1547 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1548 info->status.status_driver_data[0] = 1549 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1550 1551 ieee80211_tx_status(mvm->hw, skb); 1552 } 1553 1554 /* This is an aggregation queue or might become one, so we use 1555 * the ssn since: ssn = wifi seq_num % 256. 1556 * The seq_ctl is the sequence control of the packet to which 1557 * this Tx response relates. But if there is a hole in the 1558 * bitmap of the BA we received, this Tx response may allow to 1559 * reclaim the hole and all the subsequent packets that were 1560 * already acked. In that case, seq_ctl != ssn, and the next 1561 * packet to be reclaimed will be ssn and not seq_ctl. In that 1562 * case, several packets will be reclaimed even if 1563 * frame_count = 1. 1564 * 1565 * The ssn is the index (% 256) of the latest packet that has 1566 * treated (acked / dropped) + 1. 1567 */ 1568 next_reclaimed = ssn; 1569 1570 IWL_DEBUG_TX_REPLY(mvm, 1571 "TXQ %d status %s (0x%08x)\n", 1572 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1573 1574 IWL_DEBUG_TX_REPLY(mvm, 1575 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1576 le32_to_cpu(tx_resp->initial_rate), 1577 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1578 ssn, next_reclaimed, seq_ctl); 1579 1580 rcu_read_lock(); 1581 1582 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1583 /* 1584 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1585 * the firmware while we still have packets for it in the Tx queues. 1586 */ 1587 if (WARN_ON_ONCE(!sta)) 1588 goto out; 1589 1590 if (!IS_ERR(sta)) { 1591 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1592 1593 iwl_mvm_tx_airtime(mvm, mvmsta, 1594 le16_to_cpu(tx_resp->wireless_media_time)); 1595 1596 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS && 1597 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) 1598 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant); 1599 1600 if (sta->wme && tid != IWL_MGMT_TID) { 1601 struct iwl_mvm_tid_data *tid_data = 1602 &mvmsta->tid_data[tid]; 1603 bool send_eosp_ndp = false; 1604 1605 spin_lock_bh(&mvmsta->lock); 1606 1607 if (!is_ndp) { 1608 tid_data->next_reclaimed = next_reclaimed; 1609 IWL_DEBUG_TX_REPLY(mvm, 1610 "Next reclaimed packet:%d\n", 1611 next_reclaimed); 1612 } else { 1613 IWL_DEBUG_TX_REPLY(mvm, 1614 "NDP - don't update next_reclaimed\n"); 1615 } 1616 1617 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1618 1619 if (mvmsta->sleep_tx_count) { 1620 mvmsta->sleep_tx_count--; 1621 if (mvmsta->sleep_tx_count && 1622 !iwl_mvm_tid_queued(mvm, tid_data)) { 1623 /* 1624 * The number of frames in the queue 1625 * dropped to 0 even if we sent less 1626 * frames than we thought we had on the 1627 * Tx queue. 1628 * This means we had holes in the BA 1629 * window that we just filled, ask 1630 * mac80211 to send EOSP since the 1631 * firmware won't know how to do that. 1632 * Send NDP and the firmware will send 1633 * EOSP notification that will trigger 1634 * a call to ieee80211_sta_eosp(). 1635 */ 1636 send_eosp_ndp = true; 1637 } 1638 } 1639 1640 spin_unlock_bh(&mvmsta->lock); 1641 if (send_eosp_ndp) { 1642 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1643 IEEE80211_FRAME_RELEASE_UAPSD, 1644 1, tid, false, false); 1645 mvmsta->sleep_tx_count = 0; 1646 ieee80211_send_eosp_nullfunc(sta, tid); 1647 } 1648 } 1649 1650 if (mvmsta->next_status_eosp) { 1651 mvmsta->next_status_eosp = false; 1652 ieee80211_sta_eosp(sta); 1653 } 1654 } 1655 out: 1656 rcu_read_unlock(); 1657 } 1658 1659 #ifdef CONFIG_IWLWIFI_DEBUG 1660 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1661 static const char *iwl_get_agg_tx_status(u16 status) 1662 { 1663 switch (status & AGG_TX_STATE_STATUS_MSK) { 1664 AGG_TX_STATE_(TRANSMITTED); 1665 AGG_TX_STATE_(UNDERRUN); 1666 AGG_TX_STATE_(BT_PRIO); 1667 AGG_TX_STATE_(FEW_BYTES); 1668 AGG_TX_STATE_(ABORT); 1669 AGG_TX_STATE_(TX_ON_AIR_DROP); 1670 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1671 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1672 AGG_TX_STATE_(SCD_QUERY); 1673 AGG_TX_STATE_(TEST_BAD_CRC32); 1674 AGG_TX_STATE_(RESPONSE); 1675 AGG_TX_STATE_(DUMP_TX); 1676 AGG_TX_STATE_(DELAY_TX); 1677 } 1678 1679 return "UNKNOWN"; 1680 } 1681 1682 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1683 struct iwl_rx_packet *pkt) 1684 { 1685 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1686 struct agg_tx_status *frame_status = 1687 iwl_mvm_get_agg_status(mvm, tx_resp); 1688 int i; 1689 1690 for (i = 0; i < tx_resp->frame_count; i++) { 1691 u16 fstatus = le16_to_cpu(frame_status[i].status); 1692 1693 IWL_DEBUG_TX_REPLY(mvm, 1694 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1695 iwl_get_agg_tx_status(fstatus), 1696 fstatus & AGG_TX_STATE_STATUS_MSK, 1697 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1698 AGG_TX_STATE_TRY_CNT_POS, 1699 le16_to_cpu(frame_status[i].sequence)); 1700 } 1701 } 1702 #else 1703 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1704 struct iwl_rx_packet *pkt) 1705 {} 1706 #endif /* CONFIG_IWLWIFI_DEBUG */ 1707 1708 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1709 struct iwl_rx_packet *pkt) 1710 { 1711 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1712 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1713 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1714 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1715 struct iwl_mvm_sta *mvmsta; 1716 int queue = SEQ_TO_QUEUE(sequence); 1717 struct ieee80211_sta *sta; 1718 1719 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1720 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1721 return; 1722 1723 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1724 1725 rcu_read_lock(); 1726 1727 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1728 1729 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1730 if (WARN_ON_ONCE(!sta || !sta->wme)) { 1731 rcu_read_unlock(); 1732 return; 1733 } 1734 1735 if (!WARN_ON_ONCE(!mvmsta)) { 1736 mvmsta->tid_data[tid].rate_n_flags = 1737 le32_to_cpu(tx_resp->initial_rate); 1738 mvmsta->tid_data[tid].tx_time = 1739 le16_to_cpu(tx_resp->wireless_media_time); 1740 mvmsta->tid_data[tid].lq_color = 1741 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1742 iwl_mvm_tx_airtime(mvm, mvmsta, 1743 le16_to_cpu(tx_resp->wireless_media_time)); 1744 } 1745 1746 rcu_read_unlock(); 1747 } 1748 1749 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1750 { 1751 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1752 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1753 1754 if (tx_resp->frame_count == 1) 1755 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1756 else 1757 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1758 } 1759 1760 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1761 int txq, int index, 1762 struct ieee80211_tx_info *ba_info, u32 rate) 1763 { 1764 struct sk_buff_head reclaimed_skbs; 1765 struct iwl_mvm_tid_data *tid_data; 1766 struct ieee80211_sta *sta; 1767 struct iwl_mvm_sta *mvmsta; 1768 struct sk_buff *skb; 1769 int freed; 1770 1771 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1772 tid > IWL_MAX_TID_COUNT, 1773 "sta_id %d tid %d", sta_id, tid)) 1774 return; 1775 1776 rcu_read_lock(); 1777 1778 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1779 1780 /* Reclaiming frames for a station that has been deleted ? */ 1781 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1782 rcu_read_unlock(); 1783 return; 1784 } 1785 1786 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1787 tid_data = &mvmsta->tid_data[tid]; 1788 1789 if (tid_data->txq_id != txq) { 1790 IWL_ERR(mvm, 1791 "invalid BA notification: Q %d, tid %d\n", 1792 tid_data->txq_id, tid); 1793 rcu_read_unlock(); 1794 return; 1795 } 1796 1797 __skb_queue_head_init(&reclaimed_skbs); 1798 1799 /* 1800 * Release all TFDs before the SSN, i.e. all TFDs in front of 1801 * block-ack window (we assume that they've been successfully 1802 * transmitted ... if not, it's too late anyway). 1803 */ 1804 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1805 1806 spin_lock_bh(&mvmsta->lock); 1807 1808 tid_data->next_reclaimed = index; 1809 1810 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1811 1812 freed = 0; 1813 1814 /* pack lq color from tid_data along the reduced txp */ 1815 ba_info->status.status_driver_data[0] = 1816 RS_DRV_DATA_PACK(tid_data->lq_color, 1817 ba_info->status.status_driver_data[0]); 1818 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1819 1820 skb_queue_walk(&reclaimed_skbs, skb) { 1821 struct ieee80211_hdr *hdr = (void *)skb->data; 1822 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1823 1824 if (ieee80211_is_data_qos(hdr->frame_control)) 1825 freed++; 1826 else 1827 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1828 1829 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1830 1831 memset(&info->status, 0, sizeof(info->status)); 1832 /* Packet was transmitted successfully, failures come as single 1833 * frames because before failing a frame the firmware transmits 1834 * it without aggregation at least once. 1835 */ 1836 info->flags |= IEEE80211_TX_STAT_ACK; 1837 1838 /* this is the first skb we deliver in this batch */ 1839 /* put the rate scaling data there */ 1840 if (freed == 1) { 1841 info->flags |= IEEE80211_TX_STAT_AMPDU; 1842 memcpy(&info->status, &ba_info->status, 1843 sizeof(ba_info->status)); 1844 iwl_mvm_hwrate_to_tx_status(rate, info); 1845 } 1846 } 1847 1848 spin_unlock_bh(&mvmsta->lock); 1849 1850 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1851 * possible (i.e. first MPDU in the aggregation wasn't acked) 1852 * Still it's important to update RS about sent vs. acked. 1853 */ 1854 if (skb_queue_empty(&reclaimed_skbs)) { 1855 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1856 1857 if (mvmsta->vif) 1858 chanctx_conf = 1859 rcu_dereference(mvmsta->vif->chanctx_conf); 1860 1861 if (WARN_ON_ONCE(!chanctx_conf)) 1862 goto out; 1863 1864 ba_info->band = chanctx_conf->def.chan->band; 1865 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1866 1867 if (!iwl_mvm_has_tlc_offload(mvm)) { 1868 IWL_DEBUG_TX_REPLY(mvm, 1869 "No reclaim. Update rs directly\n"); 1870 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1871 } 1872 } 1873 1874 out: 1875 rcu_read_unlock(); 1876 1877 while (!skb_queue_empty(&reclaimed_skbs)) { 1878 skb = __skb_dequeue(&reclaimed_skbs); 1879 ieee80211_tx_status(mvm->hw, skb); 1880 } 1881 } 1882 1883 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1884 { 1885 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1886 int sta_id, tid, txq, index; 1887 struct ieee80211_tx_info ba_info = {}; 1888 struct iwl_mvm_ba_notif *ba_notif; 1889 struct iwl_mvm_tid_data *tid_data; 1890 struct iwl_mvm_sta *mvmsta; 1891 1892 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1893 1894 if (iwl_mvm_has_new_tx_api(mvm)) { 1895 struct iwl_mvm_compressed_ba_notif *ba_res = 1896 (void *)pkt->data; 1897 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 1898 int i; 1899 1900 sta_id = ba_res->sta_id; 1901 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1902 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1903 ba_info.status.tx_time = 1904 (u16)le32_to_cpu(ba_res->wireless_time); 1905 ba_info.status.status_driver_data[0] = 1906 (void *)(uintptr_t)ba_res->reduced_txp; 1907 1908 if (!le16_to_cpu(ba_res->tfd_cnt)) 1909 goto out; 1910 1911 rcu_read_lock(); 1912 1913 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1914 if (!mvmsta) 1915 goto out_unlock; 1916 1917 /* Free per TID */ 1918 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { 1919 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1920 &ba_res->tfd[i]; 1921 1922 tid = ba_tfd->tid; 1923 if (tid == IWL_MGMT_TID) 1924 tid = IWL_MAX_TID_COUNT; 1925 1926 mvmsta->tid_data[i].lq_color = lq_color; 1927 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 1928 (int)(le16_to_cpu(ba_tfd->q_num)), 1929 le16_to_cpu(ba_tfd->tfd_index), 1930 &ba_info, 1931 le32_to_cpu(ba_res->tx_rate)); 1932 } 1933 1934 iwl_mvm_tx_airtime(mvm, mvmsta, 1935 le32_to_cpu(ba_res->wireless_time)); 1936 out_unlock: 1937 rcu_read_unlock(); 1938 out: 1939 IWL_DEBUG_TX_REPLY(mvm, 1940 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1941 sta_id, le32_to_cpu(ba_res->flags), 1942 le16_to_cpu(ba_res->txed), 1943 le16_to_cpu(ba_res->done)); 1944 return; 1945 } 1946 1947 ba_notif = (void *)pkt->data; 1948 sta_id = ba_notif->sta_id; 1949 tid = ba_notif->tid; 1950 /* "flow" corresponds to Tx queue */ 1951 txq = le16_to_cpu(ba_notif->scd_flow); 1952 /* "ssn" is start of block-ack Tx window, corresponds to index 1953 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1954 index = le16_to_cpu(ba_notif->scd_ssn); 1955 1956 rcu_read_lock(); 1957 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1958 if (WARN_ON_ONCE(!mvmsta)) { 1959 rcu_read_unlock(); 1960 return; 1961 } 1962 1963 tid_data = &mvmsta->tid_data[tid]; 1964 1965 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1966 ba_info.status.ampdu_len = ba_notif->txed; 1967 ba_info.status.tx_time = tid_data->tx_time; 1968 ba_info.status.status_driver_data[0] = 1969 (void *)(uintptr_t)ba_notif->reduced_txp; 1970 1971 rcu_read_unlock(); 1972 1973 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1974 tid_data->rate_n_flags); 1975 1976 IWL_DEBUG_TX_REPLY(mvm, 1977 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1978 ba_notif->sta_addr, ba_notif->sta_id); 1979 1980 IWL_DEBUG_TX_REPLY(mvm, 1981 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1982 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1983 le64_to_cpu(ba_notif->bitmap), txq, index, 1984 ba_notif->txed, ba_notif->txed_2_done); 1985 1986 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1987 ba_notif->reduced_txp); 1988 } 1989 1990 /* 1991 * Note that there are transports that buffer frames before they reach 1992 * the firmware. This means that after flush_tx_path is called, the 1993 * queue might not be empty. The race-free way to handle this is to: 1994 * 1) set the station as draining 1995 * 2) flush the Tx path 1996 * 3) wait for the transport queues to be empty 1997 */ 1998 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 1999 { 2000 int ret; 2001 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2002 .queues_ctl = cpu_to_le32(tfd_msk), 2003 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2004 }; 2005 2006 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2007 2008 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2009 sizeof(flush_cmd), &flush_cmd); 2010 if (ret) 2011 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2012 return ret; 2013 } 2014 2015 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, 2016 u16 tids, u32 flags) 2017 { 2018 int ret; 2019 struct iwl_tx_path_flush_cmd flush_cmd = { 2020 .sta_id = cpu_to_le32(sta_id), 2021 .tid_mask = cpu_to_le16(tids), 2022 }; 2023 2024 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2025 2026 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2027 sizeof(flush_cmd), &flush_cmd); 2028 if (ret) 2029 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2030 return ret; 2031 } 2032 2033 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags) 2034 { 2035 struct iwl_mvm_int_sta *int_sta = sta; 2036 struct iwl_mvm_sta *mvm_sta = sta; 2037 2038 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != 2039 offsetof(struct iwl_mvm_sta, sta_id)); 2040 2041 if (iwl_mvm_has_new_tx_api(mvm)) 2042 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 2043 0xff | BIT(IWL_MGMT_TID), flags); 2044 2045 if (internal) 2046 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 2047 flags); 2048 2049 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags); 2050 } 2051