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_rate(struct iwl_mvm *mvm, 306 struct ieee80211_tx_info *info, 307 struct ieee80211_sta *sta) 308 { 309 int rate_idx; 310 u8 rate_plcp; 311 u32 rate_flags; 312 313 /* HT rate doesn't make sense for a non data frame */ 314 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, 315 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n", 316 info->control.rates[0].flags, 317 info->control.rates[0].idx); 318 319 rate_idx = info->control.rates[0].idx; 320 /* if the rate isn't a well known legacy rate, take the lowest one */ 321 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 322 rate_idx = rate_lowest_index( 323 &mvm->nvm_data->bands[info->band], sta); 324 325 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 326 if (info->band == NL80211_BAND_5GHZ) 327 rate_idx += IWL_FIRST_OFDM_RATE; 328 329 /* For 2.4 GHZ band, check that there is no need to remap */ 330 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 331 332 /* Get PLCP rate for tx_cmd->rate_n_flags */ 333 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 334 335 if (info->band == NL80211_BAND_2GHZ && 336 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 337 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 338 else 339 rate_flags = 340 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 341 342 /* Set CCK flag as needed */ 343 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 344 rate_flags |= RATE_MCS_CCK_MSK; 345 346 return (u32)rate_plcp | rate_flags; 347 } 348 349 /* 350 * Sets the fields in the Tx cmd that are rate related 351 */ 352 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 353 struct ieee80211_tx_info *info, 354 struct ieee80211_sta *sta, __le16 fc) 355 { 356 /* Set retry limit on RTS packets */ 357 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 358 359 /* Set retry limit on DATA packets and Probe Responses*/ 360 if (ieee80211_is_probe_resp(fc)) { 361 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 362 tx_cmd->rts_retry_limit = 363 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 364 } else if (ieee80211_is_back_req(fc)) { 365 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 366 } else { 367 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 368 } 369 370 /* 371 * for data packets, rate info comes from the table inside the fw. This 372 * table is controlled by LINK_QUALITY commands 373 */ 374 375 if (ieee80211_is_data(fc) && sta) { 376 tx_cmd->initial_rate_index = 0; 377 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 378 return; 379 } else if (ieee80211_is_back_req(fc)) { 380 tx_cmd->tx_flags |= 381 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 382 } 383 384 mvm->mgmt_last_antenna_idx = 385 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 386 mvm->mgmt_last_antenna_idx); 387 388 /* Set the rate in the TX cmd */ 389 tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 390 } 391 392 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 393 u8 *crypto_hdr) 394 { 395 struct ieee80211_key_conf *keyconf = info->control.hw_key; 396 u64 pn; 397 398 pn = atomic64_inc_return(&keyconf->tx_pn); 399 crypto_hdr[0] = pn; 400 crypto_hdr[2] = 0; 401 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 402 crypto_hdr[1] = pn >> 8; 403 crypto_hdr[4] = pn >> 16; 404 crypto_hdr[5] = pn >> 24; 405 crypto_hdr[6] = pn >> 32; 406 crypto_hdr[7] = pn >> 40; 407 } 408 409 /* 410 * Sets the fields in the Tx cmd that are crypto related 411 */ 412 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 413 struct ieee80211_tx_info *info, 414 struct iwl_tx_cmd *tx_cmd, 415 struct sk_buff *skb_frag, 416 int hdrlen) 417 { 418 struct ieee80211_key_conf *keyconf = info->control.hw_key; 419 u8 *crypto_hdr = skb_frag->data + hdrlen; 420 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 421 u64 pn; 422 423 switch (keyconf->cipher) { 424 case WLAN_CIPHER_SUITE_CCMP: 425 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 426 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 427 break; 428 429 case WLAN_CIPHER_SUITE_TKIP: 430 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 431 pn = atomic64_inc_return(&keyconf->tx_pn); 432 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 433 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 434 break; 435 436 case WLAN_CIPHER_SUITE_WEP104: 437 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 438 /* fall through */ 439 case WLAN_CIPHER_SUITE_WEP40: 440 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 441 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 442 TX_CMD_SEC_WEP_KEY_IDX_MSK); 443 444 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 445 break; 446 case WLAN_CIPHER_SUITE_GCMP: 447 case WLAN_CIPHER_SUITE_GCMP_256: 448 type = TX_CMD_SEC_GCMP; 449 /* Fall through */ 450 case WLAN_CIPHER_SUITE_CCMP_256: 451 /* TODO: Taking the key from the table might introduce a race 452 * when PTK rekeying is done, having an old packets with a PN 453 * based on the old key but the message encrypted with a new 454 * one. 455 * Need to handle this. 456 */ 457 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 458 tx_cmd->key[0] = keyconf->hw_key_idx; 459 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 460 break; 461 default: 462 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 463 } 464 } 465 466 /* 467 * Allocates and sets the Tx cmd the driver data pointers in the skb 468 */ 469 static struct iwl_device_cmd * 470 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 471 struct ieee80211_tx_info *info, int hdrlen, 472 struct ieee80211_sta *sta, u8 sta_id) 473 { 474 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 475 struct iwl_device_cmd *dev_cmd; 476 struct iwl_tx_cmd *tx_cmd; 477 478 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 479 480 if (unlikely(!dev_cmd)) 481 return NULL; 482 483 /* Make sure we zero enough of dev_cmd */ 484 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd)); 485 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) > sizeof(*tx_cmd)); 486 487 memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd)); 488 dev_cmd->hdr.cmd = TX_CMD; 489 490 if (iwl_mvm_has_new_tx_api(mvm)) { 491 u16 offload_assist = 0; 492 u32 rate_n_flags = 0; 493 u16 flags = 0; 494 495 if (ieee80211_is_data_qos(hdr->frame_control)) { 496 u8 *qc = ieee80211_get_qos_ctl(hdr); 497 498 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 499 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 500 } 501 502 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, 503 offload_assist); 504 505 /* padding is inserted later in transport */ 506 if (ieee80211_hdrlen(hdr->frame_control) % 4 && 507 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 508 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 509 510 if (!info->control.hw_key) 511 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 512 513 /* For data packets rate info comes from the fw */ 514 if (!(ieee80211_is_data(hdr->frame_control) && sta)) { 515 flags |= IWL_TX_FLAGS_CMD_RATE; 516 rate_n_flags = iwl_mvm_get_tx_rate(mvm, info, sta); 517 } 518 519 if (mvm->trans->cfg->device_family >= 520 IWL_DEVICE_FAMILY_22560) { 521 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 522 523 cmd->offload_assist |= cpu_to_le32(offload_assist); 524 525 /* Total # bytes to be transmitted */ 526 cmd->len = cpu_to_le16((u16)skb->len); 527 528 /* Copy MAC header from skb into command buffer */ 529 memcpy(cmd->hdr, hdr, hdrlen); 530 531 cmd->flags = cpu_to_le16(flags); 532 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 533 } else { 534 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 535 536 cmd->offload_assist |= cpu_to_le16(offload_assist); 537 538 /* Total # bytes to be transmitted */ 539 cmd->len = cpu_to_le16((u16)skb->len); 540 541 /* Copy MAC header from skb into command buffer */ 542 memcpy(cmd->hdr, hdr, hdrlen); 543 544 cmd->flags = cpu_to_le32(flags); 545 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 546 } 547 goto out; 548 } 549 550 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 551 552 if (info->control.hw_key) 553 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 554 555 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 556 557 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 558 559 /* Copy MAC header from skb into command buffer */ 560 memcpy(tx_cmd->hdr, hdr, hdrlen); 561 562 out: 563 return dev_cmd; 564 } 565 566 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 567 struct iwl_device_cmd *cmd) 568 { 569 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 570 571 memset(&skb_info->status, 0, sizeof(skb_info->status)); 572 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 573 574 skb_info->driver_data[1] = cmd; 575 } 576 577 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 578 struct ieee80211_tx_info *info, __le16 fc) 579 { 580 struct iwl_mvm_vif *mvmvif; 581 582 mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif); 583 584 switch (info->control.vif->type) { 585 case NL80211_IFTYPE_AP: 586 case NL80211_IFTYPE_ADHOC: 587 /* 588 * Non-bufferable frames use the broadcast station, thus they 589 * use the probe queue. 590 * Also take care of the case where we send a deauth to a 591 * station that we don't have, or similarly an association 592 * response (with non-success status) for a station we can't 593 * accept. 594 * Also, disassociate frames might happen, particular with 595 * reason 7 ("Class 3 frame received from nonassociated STA"). 596 */ 597 if (ieee80211_is_mgmt(fc) && 598 (!ieee80211_is_bufferable_mmpdu(fc) || 599 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 600 return mvm->probe_queue; 601 if (info->hw_queue == info->control.vif->cab_queue) 602 return mvmvif->cab_queue; 603 604 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 605 "fc=0x%02x", le16_to_cpu(fc)); 606 return mvm->probe_queue; 607 case NL80211_IFTYPE_P2P_DEVICE: 608 if (ieee80211_is_mgmt(fc)) 609 return mvm->p2p_dev_queue; 610 if (info->hw_queue == info->control.vif->cab_queue) 611 return mvmvif->cab_queue; 612 613 WARN_ON_ONCE(1); 614 return mvm->p2p_dev_queue; 615 default: 616 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 617 return -1; 618 } 619 } 620 621 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm, 622 struct sk_buff *skb) 623 { 624 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 625 struct iwl_mvm_vif *mvmvif = 626 iwl_mvm_vif_from_mac80211(info->control.vif); 627 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 628 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt; 629 struct iwl_probe_resp_data *resp_data; 630 u8 *ie, *pos; 631 u8 match[] = { 632 (WLAN_OUI_WFA >> 16) & 0xff, 633 (WLAN_OUI_WFA >> 8) & 0xff, 634 WLAN_OUI_WFA & 0xff, 635 WLAN_OUI_TYPE_WFA_P2P, 636 }; 637 638 rcu_read_lock(); 639 640 resp_data = rcu_dereference(mvmvif->probe_resp_data); 641 if (!resp_data) 642 goto out; 643 644 if (!resp_data->notif.noa_active) 645 goto out; 646 647 ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, 648 mgmt->u.probe_resp.variable, 649 skb->len - base_len, 650 match, 4, 2); 651 if (!ie) { 652 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n"); 653 goto out; 654 } 655 656 if (skb_tailroom(skb) < resp_data->noa_len) { 657 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) { 658 IWL_ERR(mvm, 659 "Failed to reallocate probe resp\n"); 660 goto out; 661 } 662 } 663 664 pos = skb_put(skb, resp_data->noa_len); 665 666 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 667 /* Set length of IE body (not including ID and length itself) */ 668 *pos++ = resp_data->noa_len - 2; 669 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff; 670 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff; 671 *pos++ = WLAN_OUI_WFA & 0xff; 672 *pos++ = WLAN_OUI_TYPE_WFA_P2P; 673 674 memcpy(pos, &resp_data->notif.noa_attr, 675 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie)); 676 677 out: 678 rcu_read_unlock(); 679 } 680 681 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 682 { 683 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 684 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 685 struct ieee80211_tx_info info; 686 struct iwl_device_cmd *dev_cmd; 687 u8 sta_id; 688 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 689 __le16 fc = hdr->frame_control; 690 int queue; 691 692 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used 693 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel 694 * queue. STATION (HS2.0) uses the auxiliary context of the FW, 695 * and hence needs to be sent on the aux queue 696 */ 697 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 698 skb_info->control.vif->type == NL80211_IFTYPE_STATION) 699 skb_info->hw_queue = mvm->aux_queue; 700 701 memcpy(&info, skb->cb, sizeof(info)); 702 703 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 704 return -1; 705 706 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 707 (!info.control.vif || 708 info.hw_queue != info.control.vif->cab_queue))) 709 return -1; 710 711 queue = info.hw_queue; 712 713 /* 714 * If the interface on which the frame is sent is the P2P_DEVICE 715 * or an AP/GO interface use the broadcast station associated 716 * with it; otherwise if the interface is a managed interface 717 * use the AP station associated with it for multicast traffic 718 * (this is not possible for unicast packets as a TLDS discovery 719 * response are sent without a station entry); otherwise use the 720 * AUX station. 721 */ 722 sta_id = mvm->aux_sta.sta_id; 723 if (info.control.vif) { 724 struct iwl_mvm_vif *mvmvif = 725 iwl_mvm_vif_from_mac80211(info.control.vif); 726 727 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 728 info.control.vif->type == NL80211_IFTYPE_AP || 729 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 730 if (!ieee80211_is_data(hdr->frame_control)) 731 sta_id = mvmvif->bcast_sta.sta_id; 732 else 733 sta_id = mvmvif->mcast_sta.sta_id; 734 735 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, 736 hdr->frame_control); 737 if (queue < 0) 738 return -1; 739 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 740 is_multicast_ether_addr(hdr->addr1)) { 741 u8 ap_sta_id = READ_ONCE(mvmvif->ap_sta_id); 742 743 if (ap_sta_id != IWL_MVM_INVALID_STA) 744 sta_id = ap_sta_id; 745 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 746 queue = mvm->snif_queue; 747 sta_id = mvm->snif_sta.sta_id; 748 } 749 } 750 751 if (unlikely(ieee80211_is_probe_resp(fc))) 752 iwl_mvm_probe_resp_set_noa(mvm, skb); 753 754 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 755 756 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 757 if (!dev_cmd) 758 return -1; 759 760 /* From now on, we cannot access info->control */ 761 iwl_mvm_skb_prepare_status(skb, dev_cmd); 762 763 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 764 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 765 return -1; 766 } 767 768 return 0; 769 } 770 771 #ifdef CONFIG_INET 772 773 static int 774 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 775 netdev_features_t netdev_flags, 776 struct sk_buff_head *mpdus_skb) 777 { 778 struct sk_buff *tmp, *next; 779 struct ieee80211_hdr *hdr = (void *)skb->data; 780 char cb[sizeof(skb->cb)]; 781 u16 i = 0; 782 unsigned int tcp_payload_len; 783 unsigned int mss = skb_shinfo(skb)->gso_size; 784 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 785 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 786 787 skb_shinfo(skb)->gso_size = num_subframes * mss; 788 memcpy(cb, skb->cb, sizeof(cb)); 789 790 next = skb_gso_segment(skb, netdev_flags); 791 skb_shinfo(skb)->gso_size = mss; 792 if (WARN_ON_ONCE(IS_ERR(next))) 793 return -EINVAL; 794 else if (next) 795 consume_skb(skb); 796 797 while (next) { 798 tmp = next; 799 next = tmp->next; 800 801 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 802 /* 803 * Compute the length of all the data added for the A-MSDU. 804 * This will be used to compute the length to write in the TX 805 * command. We have: SNAP + IP + TCP for n -1 subframes and 806 * ETH header for n subframes. 807 */ 808 tcp_payload_len = skb_tail_pointer(tmp) - 809 skb_transport_header(tmp) - 810 tcp_hdrlen(tmp) + tmp->data_len; 811 812 if (ipv4) 813 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 814 815 if (tcp_payload_len > mss) { 816 skb_shinfo(tmp)->gso_size = mss; 817 } else { 818 if (ieee80211_is_data_qos(hdr->frame_control)) { 819 u8 *qc; 820 821 if (ipv4) 822 ip_send_check(ip_hdr(tmp)); 823 824 qc = ieee80211_get_qos_ctl((void *)tmp->data); 825 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 826 } 827 skb_shinfo(tmp)->gso_size = 0; 828 } 829 830 tmp->prev = NULL; 831 tmp->next = NULL; 832 833 __skb_queue_tail(mpdus_skb, tmp); 834 i++; 835 } 836 837 return 0; 838 } 839 840 static unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm, 841 struct ieee80211_sta *sta, 842 unsigned int tid) 843 { 844 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 845 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band; 846 u8 ac = tid_to_mac80211_ac[tid]; 847 unsigned int txf; 848 int lmac = IWL_LMAC_24G_INDEX; 849 850 if (iwl_mvm_is_cdb_supported(mvm) && 851 band == NL80211_BAND_5GHZ) 852 lmac = IWL_LMAC_5G_INDEX; 853 854 /* For HE redirect to trigger based fifos */ 855 if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) 856 ac += 4; 857 858 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac); 859 860 /* 861 * Don't send an AMSDU that will be longer than the TXF. 862 * Add a security margin of 256 for the TX command + headers. 863 * We also want to have the start of the next packet inside the 864 * fifo to be able to send bursts. 865 */ 866 return min_t(unsigned int, mvmsta->max_amsdu_len, 867 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256); 868 } 869 870 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 871 struct ieee80211_tx_info *info, 872 struct ieee80211_sta *sta, 873 struct sk_buff_head *mpdus_skb) 874 { 875 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 876 struct ieee80211_hdr *hdr = (void *)skb->data; 877 unsigned int mss = skb_shinfo(skb)->gso_size; 878 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 879 u16 snap_ip_tcp, pad; 880 unsigned int dbg_max_amsdu_len; 881 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 882 u8 tid; 883 884 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 885 tcp_hdrlen(skb); 886 887 dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len); 888 889 if (!mvmsta->max_amsdu_len || 890 !ieee80211_is_data_qos(hdr->frame_control) || 891 (!mvmsta->amsdu_enabled && !dbg_max_amsdu_len)) 892 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 893 894 /* 895 * Do not build AMSDU for IPv6 with extension headers. 896 * ask stack to segment and checkum the generated MPDUs for us. 897 */ 898 if (skb->protocol == htons(ETH_P_IPV6) && 899 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 900 IPPROTO_TCP) { 901 netdev_flags &= ~NETIF_F_CSUM_MASK; 902 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 903 } 904 905 tid = ieee80211_get_tid(hdr); 906 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 907 return -EINVAL; 908 909 /* 910 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 911 * during an BA session. 912 */ 913 if (info->flags & IEEE80211_TX_CTL_AMPDU && 914 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) 915 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 916 917 if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) || 918 !(mvmsta->amsdu_enabled & BIT(tid))) 919 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 920 921 max_amsdu_len = iwl_mvm_max_amsdu_size(mvm, sta, tid); 922 923 if (unlikely(dbg_max_amsdu_len)) 924 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 925 dbg_max_amsdu_len); 926 927 /* 928 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 929 * supported. This is a spec requirement (IEEE 802.11-2015 930 * section 8.7.3 NOTE 3). 931 */ 932 if (info->flags & IEEE80211_TX_CTL_AMPDU && 933 !sta->vht_cap.vht_supported) 934 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 935 936 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 937 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 938 pad = (4 - subf_len) & 0x3; 939 940 /* 941 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 942 * N * subf_len + (N - 1) * pad. 943 */ 944 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 945 946 if (sta->max_amsdu_subframes && 947 num_subframes > sta->max_amsdu_subframes) 948 num_subframes = sta->max_amsdu_subframes; 949 950 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 951 tcp_hdrlen(skb) + skb->data_len; 952 953 /* 954 * Make sure we have enough TBs for the A-MSDU: 955 * 2 for each subframe 956 * 1 more for each fragment 957 * 1 more for the potential data in the header 958 */ 959 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 960 mvm->trans->max_skb_frags) 961 num_subframes = 1; 962 963 if (num_subframes > 1) 964 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 965 966 /* This skb fits in one single A-MSDU */ 967 if (num_subframes * mss >= tcp_payload_len) { 968 __skb_queue_tail(mpdus_skb, skb); 969 return 0; 970 } 971 972 /* 973 * Trick the segmentation function to make it 974 * create SKBs that can fit into one A-MSDU. 975 */ 976 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 977 mpdus_skb); 978 } 979 #else /* CONFIG_INET */ 980 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 981 struct ieee80211_tx_info *info, 982 struct ieee80211_sta *sta, 983 struct sk_buff_head *mpdus_skb) 984 { 985 /* Impossible to get TSO with CONFIG_INET */ 986 WARN_ON(1); 987 988 return -1; 989 } 990 #endif 991 992 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, 993 struct iwl_mvm_sta *mvm_sta, u8 tid, 994 struct sk_buff *skb) 995 { 996 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 997 u8 mac_queue = info->hw_queue; 998 struct sk_buff_head *deferred_tx_frames; 999 1000 lockdep_assert_held(&mvm_sta->lock); 1001 1002 mvm_sta->deferred_traffic_tid_map |= BIT(tid); 1003 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); 1004 1005 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; 1006 1007 skb_queue_tail(deferred_tx_frames, skb); 1008 1009 /* 1010 * The first deferred frame should've stopped the MAC queues, so we 1011 * should never get a second deferred frame for the RA/TID. 1012 * In case of GSO the first packet may have been split, so don't warn. 1013 */ 1014 if (skb_queue_len(deferred_tx_frames) == 1) { 1015 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); 1016 schedule_work(&mvm->add_stream_wk); 1017 } 1018 } 1019 1020 /* Check if there are any timed-out TIDs on a given shared TXQ */ 1021 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 1022 { 1023 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 1024 unsigned long now = jiffies; 1025 int tid; 1026 1027 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 1028 return false; 1029 1030 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 1031 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 1032 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 1033 return true; 1034 } 1035 1036 return false; 1037 } 1038 1039 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 1040 struct iwl_mvm_sta *mvmsta, 1041 int airtime) 1042 { 1043 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1044 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac]; 1045 1046 if (mvm->tcm.paused) 1047 return; 1048 1049 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 1050 schedule_delayed_work(&mvm->tcm.work, 0); 1051 1052 mdata->tx.airtime += airtime; 1053 } 1054 1055 static void iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 1056 struct iwl_mvm_sta *mvmsta, int tid) 1057 { 1058 u32 ac = tid_to_mac80211_ac[tid]; 1059 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 1060 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac]; 1061 1062 mdata->tx.pkts[ac]++; 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 = info->hw_queue; 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 (WARN_ON_ONCE(!mvmsta)) 1087 return -1; 1088 1089 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1090 return -1; 1091 1092 if (unlikely(ieee80211_is_probe_resp(fc))) 1093 iwl_mvm_probe_resp_set_noa(mvm, skb); 1094 1095 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1096 sta, mvmsta->sta_id); 1097 if (!dev_cmd) 1098 goto drop; 1099 1100 /* 1101 * we handle that entirely ourselves -- for uAPSD the firmware 1102 * will always send a notification, and for PS-Poll responses 1103 * we'll notify mac80211 when getting frame status 1104 */ 1105 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1106 1107 spin_lock(&mvmsta->lock); 1108 1109 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1110 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 1111 * assignment of MGMT TID 1112 */ 1113 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1114 tid = ieee80211_get_tid(hdr); 1115 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 1116 goto drop_unlock_sta; 1117 1118 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1119 if (WARN_ON_ONCE(is_ampdu && 1120 mvmsta->tid_data[tid].state != IWL_AGG_ON)) 1121 goto drop_unlock_sta; 1122 1123 seq_number = mvmsta->tid_data[tid].seq_number; 1124 seq_number &= IEEE80211_SCTL_SEQ; 1125 1126 if (!iwl_mvm_has_new_tx_api(mvm)) { 1127 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1128 1129 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1130 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1131 /* update the tx_cmd hdr as it was already copied */ 1132 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1133 } 1134 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) { 1135 tid = IWL_TID_NON_QOS; 1136 } 1137 1138 txq_id = mvmsta->tid_data[tid].txq_id; 1139 1140 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1141 1142 /* Check if TXQ needs to be allocated or re-activated */ 1143 if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE)) { 1144 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); 1145 1146 /* 1147 * The frame is now deferred, and the worker scheduled 1148 * will re-allocate it, so we can free it for now. 1149 */ 1150 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1151 spin_unlock(&mvmsta->lock); 1152 return 0; 1153 } 1154 1155 if (!iwl_mvm_has_new_tx_api(mvm)) { 1156 /* Keep track of the time of the last frame for this RA/TID */ 1157 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1158 1159 /* 1160 * If we have timed-out TIDs - schedule the worker that will 1161 * reconfig the queues and update them 1162 * 1163 * Note that the mvm->queue_info_lock isn't being taken here in 1164 * order to not serialize the TX flow. This isn't dangerous 1165 * because scheduling mvm->add_stream_wk can't ruin the state, 1166 * and if we DON'T schedule it due to some race condition then 1167 * next TX we get here we will. 1168 */ 1169 if (unlikely(mvm->queue_info[txq_id].status == 1170 IWL_MVM_QUEUE_SHARED && 1171 iwl_mvm_txq_should_update(mvm, txq_id))) 1172 schedule_work(&mvm->add_stream_wk); 1173 } 1174 1175 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 1176 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 1177 1178 /* From now on, we cannot access info->control */ 1179 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1180 1181 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1182 goto drop_unlock_sta; 1183 1184 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1185 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1186 1187 spin_unlock(&mvmsta->lock); 1188 1189 iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid); 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 return -1; 1198 } 1199 1200 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 1201 struct ieee80211_sta *sta) 1202 { 1203 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1204 struct ieee80211_tx_info info; 1205 struct sk_buff_head mpdus_skbs; 1206 unsigned int payload_len; 1207 int ret; 1208 1209 if (WARN_ON_ONCE(!mvmsta)) 1210 return -1; 1211 1212 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1213 return -1; 1214 1215 memcpy(&info, skb->cb, sizeof(info)); 1216 1217 if (!skb_is_gso(skb)) 1218 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1219 1220 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1221 tcp_hdrlen(skb) + skb->data_len; 1222 1223 if (payload_len <= skb_shinfo(skb)->gso_size) 1224 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1225 1226 __skb_queue_head_init(&mpdus_skbs); 1227 1228 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1229 if (ret) 1230 return ret; 1231 1232 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1233 return ret; 1234 1235 while (!skb_queue_empty(&mpdus_skbs)) { 1236 skb = __skb_dequeue(&mpdus_skbs); 1237 1238 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1239 if (ret) { 1240 __skb_queue_purge(&mpdus_skbs); 1241 return ret; 1242 } 1243 } 1244 1245 return 0; 1246 } 1247 1248 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1249 struct ieee80211_sta *sta, u8 tid) 1250 { 1251 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1252 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1253 struct ieee80211_vif *vif = mvmsta->vif; 1254 u16 normalized_ssn; 1255 1256 lockdep_assert_held(&mvmsta->lock); 1257 1258 if ((tid_data->state == IWL_AGG_ON || 1259 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1260 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1261 /* 1262 * Now that this aggregation or DQA queue is empty tell 1263 * mac80211 so it knows we no longer have frames buffered for 1264 * the station on this TID (for the TIM bitmap calculation.) 1265 */ 1266 ieee80211_sta_set_buffered(sta, tid, false); 1267 } 1268 1269 /* 1270 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1271 * to align the wrap around of ssn so we compare relevant values. 1272 */ 1273 normalized_ssn = tid_data->ssn; 1274 if (mvm->trans->cfg->gen2) 1275 normalized_ssn &= 0xff; 1276 1277 if (normalized_ssn != tid_data->next_reclaimed) 1278 return; 1279 1280 switch (tid_data->state) { 1281 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1282 IWL_DEBUG_TX_QUEUES(mvm, 1283 "Can continue addBA flow ssn = next_recl = %d\n", 1284 tid_data->next_reclaimed); 1285 tid_data->state = IWL_AGG_STARTING; 1286 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1287 break; 1288 1289 case IWL_EMPTYING_HW_QUEUE_DELBA: 1290 IWL_DEBUG_TX_QUEUES(mvm, 1291 "Can continue DELBA flow ssn = next_recl = %d\n", 1292 tid_data->next_reclaimed); 1293 tid_data->state = IWL_AGG_OFF; 1294 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1295 break; 1296 1297 default: 1298 break; 1299 } 1300 } 1301 1302 #ifdef CONFIG_IWLWIFI_DEBUG 1303 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1304 { 1305 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1306 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1307 1308 switch (status & TX_STATUS_MSK) { 1309 case TX_STATUS_SUCCESS: 1310 return "SUCCESS"; 1311 TX_STATUS_POSTPONE(DELAY); 1312 TX_STATUS_POSTPONE(FEW_BYTES); 1313 TX_STATUS_POSTPONE(BT_PRIO); 1314 TX_STATUS_POSTPONE(QUIET_PERIOD); 1315 TX_STATUS_POSTPONE(CALC_TTAK); 1316 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1317 TX_STATUS_FAIL(SHORT_LIMIT); 1318 TX_STATUS_FAIL(LONG_LIMIT); 1319 TX_STATUS_FAIL(UNDERRUN); 1320 TX_STATUS_FAIL(DRAIN_FLOW); 1321 TX_STATUS_FAIL(RFKILL_FLUSH); 1322 TX_STATUS_FAIL(LIFE_EXPIRE); 1323 TX_STATUS_FAIL(DEST_PS); 1324 TX_STATUS_FAIL(HOST_ABORTED); 1325 TX_STATUS_FAIL(BT_RETRY); 1326 TX_STATUS_FAIL(STA_INVALID); 1327 TX_STATUS_FAIL(FRAG_DROPPED); 1328 TX_STATUS_FAIL(TID_DISABLE); 1329 TX_STATUS_FAIL(FIFO_FLUSHED); 1330 TX_STATUS_FAIL(SMALL_CF_POLL); 1331 TX_STATUS_FAIL(FW_DROP); 1332 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1333 } 1334 1335 return "UNKNOWN"; 1336 1337 #undef TX_STATUS_FAIL 1338 #undef TX_STATUS_POSTPONE 1339 } 1340 #endif /* CONFIG_IWLWIFI_DEBUG */ 1341 1342 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1343 enum nl80211_band band, 1344 struct ieee80211_tx_rate *r) 1345 { 1346 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1347 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1348 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1349 case RATE_MCS_CHAN_WIDTH_20: 1350 break; 1351 case RATE_MCS_CHAN_WIDTH_40: 1352 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1353 break; 1354 case RATE_MCS_CHAN_WIDTH_80: 1355 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1356 break; 1357 case RATE_MCS_CHAN_WIDTH_160: 1358 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1359 break; 1360 } 1361 if (rate_n_flags & RATE_MCS_SGI_MSK) 1362 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1363 if (rate_n_flags & RATE_MCS_HT_MSK) { 1364 r->flags |= IEEE80211_TX_RC_MCS; 1365 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1366 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1367 ieee80211_rate_set_vht( 1368 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1369 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1370 RATE_VHT_MCS_NSS_POS) + 1); 1371 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1372 } else { 1373 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1374 band); 1375 } 1376 } 1377 1378 /** 1379 * translate ucode response to mac80211 tx status control values 1380 */ 1381 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1382 struct ieee80211_tx_info *info) 1383 { 1384 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1385 1386 info->status.antenna = 1387 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1388 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1389 } 1390 1391 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1392 u32 status) 1393 { 1394 struct iwl_fw_dbg_trigger_tlv *trig; 1395 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1396 int i; 1397 1398 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, 1399 FW_DBG_TRIGGER_TX_STATUS); 1400 if (!trig) 1401 return; 1402 1403 status_trig = (void *)trig->data; 1404 1405 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1406 /* don't collect on status 0 */ 1407 if (!status_trig->statuses[i].status) 1408 break; 1409 1410 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1411 continue; 1412 1413 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1414 "Tx status %d was received", 1415 status & TX_STATUS_MSK); 1416 break; 1417 } 1418 } 1419 1420 /** 1421 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1422 * @tx_resp: the Tx response from the fw (agg or non-agg) 1423 * 1424 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1425 * it can't know that everything will go well until the end of the AMPDU, it 1426 * can't know in advance the number of MPDUs that will be sent in the current 1427 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1428 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1429 * of the batch. This is why the SSN of the SCD is written at the end of the 1430 * whole struct at a variable offset. This function knows how to cope with the 1431 * variable offset and returns the SSN of the SCD. 1432 */ 1433 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1434 struct iwl_mvm_tx_resp *tx_resp) 1435 { 1436 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1437 tx_resp->frame_count) & 0xfff; 1438 } 1439 1440 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1441 struct iwl_rx_packet *pkt) 1442 { 1443 struct ieee80211_sta *sta; 1444 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1445 int txq_id = SEQ_TO_QUEUE(sequence); 1446 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1447 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1448 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1449 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1450 struct agg_tx_status *agg_status = 1451 iwl_mvm_get_agg_status(mvm, tx_resp); 1452 u32 status = le16_to_cpu(agg_status->status); 1453 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1454 struct iwl_mvm_sta *mvmsta; 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 /* 1505 * If we are freeing multiple frames, mark all the frames 1506 * but the first one as acked, since they were acknowledged 1507 * before 1508 * */ 1509 if (skb_freed > 1) 1510 info->flags |= IEEE80211_TX_STAT_ACK; 1511 1512 iwl_mvm_tx_status_check_trigger(mvm, status); 1513 1514 info->status.rates[0].count = tx_resp->failure_frame + 1; 1515 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1516 info); 1517 info->status.status_driver_data[1] = 1518 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1519 1520 /* Single frame failure in an AMPDU queue => send BAR */ 1521 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1522 !(info->flags & IEEE80211_TX_STAT_ACK) && 1523 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1524 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1525 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1526 1527 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */ 1528 if (ieee80211_is_back_req(hdr->frame_control)) 1529 seq_ctl = 0; 1530 else if (status != TX_STATUS_SUCCESS) 1531 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1532 1533 if (unlikely(!seq_ctl)) { 1534 struct ieee80211_hdr *hdr = (void *)skb->data; 1535 1536 /* 1537 * If it is an NDP, we can't update next_reclaim since 1538 * its sequence control is 0. Note that for that same 1539 * reason, NDPs are never sent to A-MPDU'able queues 1540 * so that we can never have more than one freed frame 1541 * for a single Tx resonse (see WARN_ON below). 1542 */ 1543 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1544 is_ndp = true; 1545 } 1546 1547 /* 1548 * TODO: this is not accurate if we are freeing more than one 1549 * packet. 1550 */ 1551 info->status.tx_time = 1552 le16_to_cpu(tx_resp->wireless_media_time); 1553 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1554 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1555 info->status.status_driver_data[0] = 1556 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1557 1558 ieee80211_tx_status(mvm->hw, skb); 1559 } 1560 1561 /* This is an aggregation queue or might become one, so we use 1562 * the ssn since: ssn = wifi seq_num % 256. 1563 * The seq_ctl is the sequence control of the packet to which 1564 * this Tx response relates. But if there is a hole in the 1565 * bitmap of the BA we received, this Tx response may allow to 1566 * reclaim the hole and all the subsequent packets that were 1567 * already acked. In that case, seq_ctl != ssn, and the next 1568 * packet to be reclaimed will be ssn and not seq_ctl. In that 1569 * case, several packets will be reclaimed even if 1570 * frame_count = 1. 1571 * 1572 * The ssn is the index (% 256) of the latest packet that has 1573 * treated (acked / dropped) + 1. 1574 */ 1575 next_reclaimed = ssn; 1576 1577 IWL_DEBUG_TX_REPLY(mvm, 1578 "TXQ %d status %s (0x%08x)\n", 1579 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1580 1581 IWL_DEBUG_TX_REPLY(mvm, 1582 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1583 le32_to_cpu(tx_resp->initial_rate), 1584 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1585 ssn, next_reclaimed, seq_ctl); 1586 1587 rcu_read_lock(); 1588 1589 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1590 /* 1591 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1592 * the firmware while we still have packets for it in the Tx queues. 1593 */ 1594 if (WARN_ON_ONCE(!sta)) 1595 goto out; 1596 1597 if (!IS_ERR(sta)) { 1598 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1599 1600 iwl_mvm_tx_airtime(mvm, mvmsta, 1601 le16_to_cpu(tx_resp->wireless_media_time)); 1602 1603 if (sta->wme && tid != IWL_MGMT_TID) { 1604 struct iwl_mvm_tid_data *tid_data = 1605 &mvmsta->tid_data[tid]; 1606 bool send_eosp_ndp = false; 1607 1608 spin_lock_bh(&mvmsta->lock); 1609 1610 if (!is_ndp) { 1611 tid_data->next_reclaimed = next_reclaimed; 1612 IWL_DEBUG_TX_REPLY(mvm, 1613 "Next reclaimed packet:%d\n", 1614 next_reclaimed); 1615 } else { 1616 IWL_DEBUG_TX_REPLY(mvm, 1617 "NDP - don't update next_reclaimed\n"); 1618 } 1619 1620 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1621 1622 if (mvmsta->sleep_tx_count) { 1623 mvmsta->sleep_tx_count--; 1624 if (mvmsta->sleep_tx_count && 1625 !iwl_mvm_tid_queued(mvm, tid_data)) { 1626 /* 1627 * The number of frames in the queue 1628 * dropped to 0 even if we sent less 1629 * frames than we thought we had on the 1630 * Tx queue. 1631 * This means we had holes in the BA 1632 * window that we just filled, ask 1633 * mac80211 to send EOSP since the 1634 * firmware won't know how to do that. 1635 * Send NDP and the firmware will send 1636 * EOSP notification that will trigger 1637 * a call to ieee80211_sta_eosp(). 1638 */ 1639 send_eosp_ndp = true; 1640 } 1641 } 1642 1643 spin_unlock_bh(&mvmsta->lock); 1644 if (send_eosp_ndp) { 1645 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1646 IEEE80211_FRAME_RELEASE_UAPSD, 1647 1, tid, false, false); 1648 mvmsta->sleep_tx_count = 0; 1649 ieee80211_send_eosp_nullfunc(sta, tid); 1650 } 1651 } 1652 1653 if (mvmsta->next_status_eosp) { 1654 mvmsta->next_status_eosp = false; 1655 ieee80211_sta_eosp(sta); 1656 } 1657 } else { 1658 mvmsta = NULL; 1659 } 1660 1661 out: 1662 rcu_read_unlock(); 1663 } 1664 1665 #ifdef CONFIG_IWLWIFI_DEBUG 1666 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1667 static const char *iwl_get_agg_tx_status(u16 status) 1668 { 1669 switch (status & AGG_TX_STATE_STATUS_MSK) { 1670 AGG_TX_STATE_(TRANSMITTED); 1671 AGG_TX_STATE_(UNDERRUN); 1672 AGG_TX_STATE_(BT_PRIO); 1673 AGG_TX_STATE_(FEW_BYTES); 1674 AGG_TX_STATE_(ABORT); 1675 AGG_TX_STATE_(TX_ON_AIR_DROP); 1676 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1677 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1678 AGG_TX_STATE_(SCD_QUERY); 1679 AGG_TX_STATE_(TEST_BAD_CRC32); 1680 AGG_TX_STATE_(RESPONSE); 1681 AGG_TX_STATE_(DUMP_TX); 1682 AGG_TX_STATE_(DELAY_TX); 1683 } 1684 1685 return "UNKNOWN"; 1686 } 1687 1688 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1689 struct iwl_rx_packet *pkt) 1690 { 1691 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1692 struct agg_tx_status *frame_status = 1693 iwl_mvm_get_agg_status(mvm, tx_resp); 1694 int i; 1695 1696 for (i = 0; i < tx_resp->frame_count; i++) { 1697 u16 fstatus = le16_to_cpu(frame_status[i].status); 1698 1699 IWL_DEBUG_TX_REPLY(mvm, 1700 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1701 iwl_get_agg_tx_status(fstatus), 1702 fstatus & AGG_TX_STATE_STATUS_MSK, 1703 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1704 AGG_TX_STATE_TRY_CNT_POS, 1705 le16_to_cpu(frame_status[i].sequence)); 1706 } 1707 } 1708 #else 1709 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1710 struct iwl_rx_packet *pkt) 1711 {} 1712 #endif /* CONFIG_IWLWIFI_DEBUG */ 1713 1714 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1715 struct iwl_rx_packet *pkt) 1716 { 1717 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1718 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1719 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1720 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1721 struct iwl_mvm_sta *mvmsta; 1722 int queue = SEQ_TO_QUEUE(sequence); 1723 struct ieee80211_sta *sta; 1724 1725 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1726 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1727 return; 1728 1729 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1730 1731 rcu_read_lock(); 1732 1733 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1734 1735 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1736 if (WARN_ON_ONCE(!sta || !sta->wme)) { 1737 rcu_read_unlock(); 1738 return; 1739 } 1740 1741 if (!WARN_ON_ONCE(!mvmsta)) { 1742 mvmsta->tid_data[tid].rate_n_flags = 1743 le32_to_cpu(tx_resp->initial_rate); 1744 mvmsta->tid_data[tid].tx_time = 1745 le16_to_cpu(tx_resp->wireless_media_time); 1746 mvmsta->tid_data[tid].lq_color = 1747 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1748 iwl_mvm_tx_airtime(mvm, mvmsta, 1749 le16_to_cpu(tx_resp->wireless_media_time)); 1750 } 1751 1752 rcu_read_unlock(); 1753 } 1754 1755 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1756 { 1757 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1758 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1759 1760 if (tx_resp->frame_count == 1) 1761 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1762 else 1763 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1764 } 1765 1766 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1767 int txq, int index, 1768 struct ieee80211_tx_info *ba_info, u32 rate) 1769 { 1770 struct sk_buff_head reclaimed_skbs; 1771 struct iwl_mvm_tid_data *tid_data; 1772 struct ieee80211_sta *sta; 1773 struct iwl_mvm_sta *mvmsta; 1774 struct sk_buff *skb; 1775 int freed; 1776 1777 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1778 tid > IWL_MAX_TID_COUNT, 1779 "sta_id %d tid %d", sta_id, tid)) 1780 return; 1781 1782 rcu_read_lock(); 1783 1784 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1785 1786 /* Reclaiming frames for a station that has been deleted ? */ 1787 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1788 rcu_read_unlock(); 1789 return; 1790 } 1791 1792 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1793 tid_data = &mvmsta->tid_data[tid]; 1794 1795 if (tid_data->txq_id != txq) { 1796 IWL_ERR(mvm, 1797 "invalid BA notification: Q %d, tid %d\n", 1798 tid_data->txq_id, tid); 1799 rcu_read_unlock(); 1800 return; 1801 } 1802 1803 spin_lock_bh(&mvmsta->lock); 1804 1805 __skb_queue_head_init(&reclaimed_skbs); 1806 1807 /* 1808 * Release all TFDs before the SSN, i.e. all TFDs in front of 1809 * block-ack window (we assume that they've been successfully 1810 * transmitted ... if not, it's too late anyway). 1811 */ 1812 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1813 1814 tid_data->next_reclaimed = index; 1815 1816 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1817 1818 freed = 0; 1819 1820 /* pack lq color from tid_data along the reduced txp */ 1821 ba_info->status.status_driver_data[0] = 1822 RS_DRV_DATA_PACK(tid_data->lq_color, 1823 ba_info->status.status_driver_data[0]); 1824 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1825 1826 skb_queue_walk(&reclaimed_skbs, skb) { 1827 struct ieee80211_hdr *hdr = (void *)skb->data; 1828 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1829 1830 if (ieee80211_is_data_qos(hdr->frame_control)) 1831 freed++; 1832 else 1833 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1834 1835 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1836 1837 memset(&info->status, 0, sizeof(info->status)); 1838 /* Packet was transmitted successfully, failures come as single 1839 * frames because before failing a frame the firmware transmits 1840 * it without aggregation at least once. 1841 */ 1842 info->flags |= IEEE80211_TX_STAT_ACK; 1843 1844 /* this is the first skb we deliver in this batch */ 1845 /* put the rate scaling data there */ 1846 if (freed == 1) { 1847 info->flags |= IEEE80211_TX_STAT_AMPDU; 1848 memcpy(&info->status, &ba_info->status, 1849 sizeof(ba_info->status)); 1850 iwl_mvm_hwrate_to_tx_status(rate, info); 1851 } 1852 } 1853 1854 spin_unlock_bh(&mvmsta->lock); 1855 1856 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1857 * possible (i.e. first MPDU in the aggregation wasn't acked) 1858 * Still it's important to update RS about sent vs. acked. 1859 */ 1860 if (skb_queue_empty(&reclaimed_skbs)) { 1861 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1862 1863 if (mvmsta->vif) 1864 chanctx_conf = 1865 rcu_dereference(mvmsta->vif->chanctx_conf); 1866 1867 if (WARN_ON_ONCE(!chanctx_conf)) 1868 goto out; 1869 1870 ba_info->band = chanctx_conf->def.chan->band; 1871 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1872 1873 if (!iwl_mvm_has_tlc_offload(mvm)) { 1874 IWL_DEBUG_TX_REPLY(mvm, 1875 "No reclaim. Update rs directly\n"); 1876 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1877 } 1878 } 1879 1880 out: 1881 rcu_read_unlock(); 1882 1883 while (!skb_queue_empty(&reclaimed_skbs)) { 1884 skb = __skb_dequeue(&reclaimed_skbs); 1885 ieee80211_tx_status(mvm->hw, skb); 1886 } 1887 } 1888 1889 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1890 { 1891 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1892 int sta_id, tid, txq, index; 1893 struct ieee80211_tx_info ba_info = {}; 1894 struct iwl_mvm_ba_notif *ba_notif; 1895 struct iwl_mvm_tid_data *tid_data; 1896 struct iwl_mvm_sta *mvmsta; 1897 1898 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1899 1900 if (iwl_mvm_has_new_tx_api(mvm)) { 1901 struct iwl_mvm_compressed_ba_notif *ba_res = 1902 (void *)pkt->data; 1903 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 1904 int i; 1905 1906 sta_id = ba_res->sta_id; 1907 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1908 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1909 ba_info.status.tx_time = 1910 (u16)le32_to_cpu(ba_res->wireless_time); 1911 ba_info.status.status_driver_data[0] = 1912 (void *)(uintptr_t)ba_res->reduced_txp; 1913 1914 if (!le16_to_cpu(ba_res->tfd_cnt)) 1915 goto out; 1916 1917 rcu_read_lock(); 1918 1919 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1920 if (!mvmsta) 1921 goto out_unlock; 1922 1923 /* Free per TID */ 1924 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { 1925 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1926 &ba_res->tfd[i]; 1927 1928 tid = ba_tfd->tid; 1929 if (tid == IWL_MGMT_TID) 1930 tid = IWL_MAX_TID_COUNT; 1931 1932 mvmsta->tid_data[i].lq_color = lq_color; 1933 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 1934 (int)(le16_to_cpu(ba_tfd->q_num)), 1935 le16_to_cpu(ba_tfd->tfd_index), 1936 &ba_info, 1937 le32_to_cpu(ba_res->tx_rate)); 1938 } 1939 1940 iwl_mvm_tx_airtime(mvm, mvmsta, 1941 le32_to_cpu(ba_res->wireless_time)); 1942 out_unlock: 1943 rcu_read_unlock(); 1944 out: 1945 IWL_DEBUG_TX_REPLY(mvm, 1946 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1947 sta_id, le32_to_cpu(ba_res->flags), 1948 le16_to_cpu(ba_res->txed), 1949 le16_to_cpu(ba_res->done)); 1950 return; 1951 } 1952 1953 ba_notif = (void *)pkt->data; 1954 sta_id = ba_notif->sta_id; 1955 tid = ba_notif->tid; 1956 /* "flow" corresponds to Tx queue */ 1957 txq = le16_to_cpu(ba_notif->scd_flow); 1958 /* "ssn" is start of block-ack Tx window, corresponds to index 1959 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1960 index = le16_to_cpu(ba_notif->scd_ssn); 1961 1962 rcu_read_lock(); 1963 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1964 if (WARN_ON_ONCE(!mvmsta)) { 1965 rcu_read_unlock(); 1966 return; 1967 } 1968 1969 tid_data = &mvmsta->tid_data[tid]; 1970 1971 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1972 ba_info.status.ampdu_len = ba_notif->txed; 1973 ba_info.status.tx_time = tid_data->tx_time; 1974 ba_info.status.status_driver_data[0] = 1975 (void *)(uintptr_t)ba_notif->reduced_txp; 1976 1977 rcu_read_unlock(); 1978 1979 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1980 tid_data->rate_n_flags); 1981 1982 IWL_DEBUG_TX_REPLY(mvm, 1983 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1984 ba_notif->sta_addr, ba_notif->sta_id); 1985 1986 IWL_DEBUG_TX_REPLY(mvm, 1987 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1988 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1989 le64_to_cpu(ba_notif->bitmap), txq, index, 1990 ba_notif->txed, ba_notif->txed_2_done); 1991 1992 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1993 ba_notif->reduced_txp); 1994 } 1995 1996 /* 1997 * Note that there are transports that buffer frames before they reach 1998 * the firmware. This means that after flush_tx_path is called, the 1999 * queue might not be empty. The race-free way to handle this is to: 2000 * 1) set the station as draining 2001 * 2) flush the Tx path 2002 * 3) wait for the transport queues to be empty 2003 */ 2004 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 2005 { 2006 int ret; 2007 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 2008 .queues_ctl = cpu_to_le32(tfd_msk), 2009 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 2010 }; 2011 2012 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 2013 2014 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2015 sizeof(flush_cmd), &flush_cmd); 2016 if (ret) 2017 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2018 return ret; 2019 } 2020 2021 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, 2022 u16 tids, u32 flags) 2023 { 2024 int ret; 2025 struct iwl_tx_path_flush_cmd flush_cmd = { 2026 .sta_id = cpu_to_le32(sta_id), 2027 .tid_mask = cpu_to_le16(tids), 2028 }; 2029 2030 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 2031 2032 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 2033 sizeof(flush_cmd), &flush_cmd); 2034 if (ret) 2035 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 2036 return ret; 2037 } 2038 2039 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags) 2040 { 2041 struct iwl_mvm_int_sta *int_sta = sta; 2042 struct iwl_mvm_sta *mvm_sta = sta; 2043 2044 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != 2045 offsetof(struct iwl_mvm_sta, sta_id)); 2046 2047 if (iwl_mvm_has_new_tx_api(mvm)) 2048 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 2049 0xff | BIT(IWL_MGMT_TID), flags); 2050 2051 if (internal) 2052 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 2053 flags); 2054 2055 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags); 2056 } 2057