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 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 #include <linux/ieee80211.h> 68 #include <linux/etherdevice.h> 69 #include <linux/tcp.h> 70 #include <net/ip.h> 71 #include <net/ipv6.h> 72 73 #include "iwl-trans.h" 74 #include "iwl-eeprom-parse.h" 75 #include "mvm.h" 76 #include "sta.h" 77 #include "fw-dbg.h" 78 79 static void 80 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 81 u16 tid, u16 ssn) 82 { 83 struct iwl_fw_dbg_trigger_tlv *trig; 84 struct iwl_fw_dbg_trigger_ba *ba_trig; 85 86 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA)) 87 return; 88 89 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA); 90 ba_trig = (void *)trig->data; 91 92 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) 93 return; 94 95 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 96 return; 97 98 iwl_mvm_fw_dbg_collect_trig(mvm, trig, 99 "BAR sent to %pM, tid %d, ssn %d", 100 addr, tid, ssn); 101 } 102 103 #define OPT_HDR(type, skb, off) \ 104 (type *)(skb_network_header(skb) + (off)) 105 106 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 107 struct ieee80211_hdr *hdr, 108 struct ieee80211_tx_info *info, 109 u16 offload_assist) 110 { 111 #if IS_ENABLED(CONFIG_INET) 112 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 113 u8 protocol = 0; 114 115 /* 116 * Do not compute checksum if already computed or if transport will 117 * compute it 118 */ 119 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD) 120 goto out; 121 122 /* We do not expect to be requested to csum stuff we do not support */ 123 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 124 (skb->protocol != htons(ETH_P_IP) && 125 skb->protocol != htons(ETH_P_IPV6)), 126 "No support for requested checksum\n")) { 127 skb_checksum_help(skb); 128 goto out; 129 } 130 131 if (skb->protocol == htons(ETH_P_IP)) { 132 protocol = ip_hdr(skb)->protocol; 133 } else { 134 #if IS_ENABLED(CONFIG_IPV6) 135 struct ipv6hdr *ipv6h = 136 (struct ipv6hdr *)skb_network_header(skb); 137 unsigned int off = sizeof(*ipv6h); 138 139 protocol = ipv6h->nexthdr; 140 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 141 struct ipv6_opt_hdr *hp; 142 143 /* only supported extension headers */ 144 if (protocol != NEXTHDR_ROUTING && 145 protocol != NEXTHDR_HOP && 146 protocol != NEXTHDR_DEST) { 147 skb_checksum_help(skb); 148 goto out; 149 } 150 151 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 152 protocol = hp->nexthdr; 153 off += ipv6_optlen(hp); 154 } 155 /* if we get here - protocol now should be TCP/UDP */ 156 #endif 157 } 158 159 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 160 WARN_ON_ONCE(1); 161 skb_checksum_help(skb); 162 goto out; 163 } 164 165 /* enable L4 csum */ 166 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 167 168 /* 169 * Set offset to IP header (snap). 170 * We don't support tunneling so no need to take care of inner header. 171 * Size is in words. 172 */ 173 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 174 175 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 176 if (skb->protocol == htons(ETH_P_IP) && 177 (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) { 178 ip_hdr(skb)->check = 0; 179 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 180 } 181 182 /* reset UDP/TCP header csum */ 183 if (protocol == IPPROTO_TCP) 184 tcp_hdr(skb)->check = 0; 185 else 186 udp_hdr(skb)->check = 0; 187 188 /* mac header len should include IV, size is in words */ 189 if (info->control.hw_key) 190 mh_len += info->control.hw_key->iv_len; 191 mh_len /= 2; 192 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 193 194 out: 195 #endif 196 return offload_assist; 197 } 198 199 /* 200 * Sets most of the Tx cmd's fields 201 */ 202 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 203 struct iwl_tx_cmd *tx_cmd, 204 struct ieee80211_tx_info *info, u8 sta_id) 205 { 206 struct ieee80211_hdr *hdr = (void *)skb->data; 207 __le16 fc = hdr->frame_control; 208 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 209 u32 len = skb->len + FCS_LEN; 210 u16 offload_assist = 0; 211 u8 ac; 212 213 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 214 tx_flags |= TX_CMD_FLG_ACK; 215 else 216 tx_flags &= ~TX_CMD_FLG_ACK; 217 218 if (ieee80211_is_probe_resp(fc)) 219 tx_flags |= TX_CMD_FLG_TSF; 220 221 if (ieee80211_has_morefrags(fc)) 222 tx_flags |= TX_CMD_FLG_MORE_FRAG; 223 224 if (ieee80211_is_data_qos(fc)) { 225 u8 *qc = ieee80211_get_qos_ctl(hdr); 226 tx_cmd->tid_tspec = qc[0] & 0xf; 227 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 228 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 229 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 230 } else if (ieee80211_is_back_req(fc)) { 231 struct ieee80211_bar *bar = (void *)skb->data; 232 u16 control = le16_to_cpu(bar->control); 233 u16 ssn = le16_to_cpu(bar->start_seq_num); 234 235 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 236 tx_cmd->tid_tspec = (control & 237 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 238 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 239 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 240 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 241 ssn); 242 } else { 243 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 244 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 245 tx_flags |= TX_CMD_FLG_SEQ_CTL; 246 else 247 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 248 } 249 250 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */ 251 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 252 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 253 else 254 ac = tid_to_mac80211_ac[0]; 255 256 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 257 TX_CMD_FLG_BT_PRIO_POS; 258 259 if (ieee80211_is_mgmt(fc)) { 260 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 261 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 262 else if (ieee80211_is_action(fc)) 263 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 264 else 265 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 266 267 /* The spec allows Action frames in A-MPDU, we don't support 268 * it 269 */ 270 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 271 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 272 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 273 } else { 274 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 275 } 276 277 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 278 !is_multicast_ether_addr(ieee80211_get_DA(hdr))) 279 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 280 281 if (fw_has_capa(&mvm->fw->ucode_capa, 282 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 283 ieee80211_action_contains_tpc(skb)) 284 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 285 286 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 287 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 288 tx_cmd->len = cpu_to_le16((u16)skb->len); 289 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 290 tx_cmd->sta_id = sta_id; 291 292 /* padding is inserted later in transport */ 293 if (ieee80211_hdrlen(fc) % 4 && 294 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 295 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 296 297 tx_cmd->offload_assist |= 298 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info, 299 offload_assist)); 300 } 301 302 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 303 struct ieee80211_tx_info *info, 304 struct ieee80211_sta *sta) 305 { 306 int rate_idx; 307 u8 rate_plcp; 308 u32 rate_flags; 309 310 /* HT rate doesn't make sense for a non data frame */ 311 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, 312 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n", 313 info->control.rates[0].flags, 314 info->control.rates[0].idx); 315 316 rate_idx = info->control.rates[0].idx; 317 /* if the rate isn't a well known legacy rate, take the lowest one */ 318 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 319 rate_idx = rate_lowest_index( 320 &mvm->nvm_data->bands[info->band], sta); 321 322 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 323 if (info->band == NL80211_BAND_5GHZ) 324 rate_idx += IWL_FIRST_OFDM_RATE; 325 326 /* For 2.4 GHZ band, check that there is no need to remap */ 327 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 328 329 /* Get PLCP rate for tx_cmd->rate_n_flags */ 330 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 331 332 if (info->band == NL80211_BAND_2GHZ && 333 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 334 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 335 else 336 rate_flags = 337 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 338 339 /* Set CCK flag as needed */ 340 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 341 rate_flags |= RATE_MCS_CCK_MSK; 342 343 return (u32)rate_plcp | rate_flags; 344 } 345 346 /* 347 * Sets the fields in the Tx cmd that are rate related 348 */ 349 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 350 struct ieee80211_tx_info *info, 351 struct ieee80211_sta *sta, __le16 fc) 352 { 353 /* Set retry limit on RTS packets */ 354 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 355 356 /* Set retry limit on DATA packets and Probe Responses*/ 357 if (ieee80211_is_probe_resp(fc)) { 358 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 359 tx_cmd->rts_retry_limit = 360 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 361 } else if (ieee80211_is_back_req(fc)) { 362 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 363 } else { 364 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 365 } 366 367 /* 368 * for data packets, rate info comes from the table inside the fw. This 369 * table is controlled by LINK_QUALITY commands 370 */ 371 372 if (ieee80211_is_data(fc) && sta) { 373 tx_cmd->initial_rate_index = 0; 374 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 375 return; 376 } else if (ieee80211_is_back_req(fc)) { 377 tx_cmd->tx_flags |= 378 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 379 } 380 381 mvm->mgmt_last_antenna_idx = 382 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 383 mvm->mgmt_last_antenna_idx); 384 385 /* Set the rate in the TX cmd */ 386 tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 387 } 388 389 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 390 u8 *crypto_hdr) 391 { 392 struct ieee80211_key_conf *keyconf = info->control.hw_key; 393 u64 pn; 394 395 pn = atomic64_inc_return(&keyconf->tx_pn); 396 crypto_hdr[0] = pn; 397 crypto_hdr[2] = 0; 398 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 399 crypto_hdr[1] = pn >> 8; 400 crypto_hdr[4] = pn >> 16; 401 crypto_hdr[5] = pn >> 24; 402 crypto_hdr[6] = pn >> 32; 403 crypto_hdr[7] = pn >> 40; 404 } 405 406 /* 407 * Sets the fields in the Tx cmd that are crypto related 408 */ 409 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 410 struct ieee80211_tx_info *info, 411 struct iwl_tx_cmd *tx_cmd, 412 struct sk_buff *skb_frag, 413 int hdrlen) 414 { 415 struct ieee80211_key_conf *keyconf = info->control.hw_key; 416 u8 *crypto_hdr = skb_frag->data + hdrlen; 417 u64 pn; 418 419 switch (keyconf->cipher) { 420 case WLAN_CIPHER_SUITE_CCMP: 421 case WLAN_CIPHER_SUITE_CCMP_256: 422 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 423 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 424 break; 425 426 case WLAN_CIPHER_SUITE_TKIP: 427 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 428 pn = atomic64_inc_return(&keyconf->tx_pn); 429 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 430 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 431 break; 432 433 case WLAN_CIPHER_SUITE_WEP104: 434 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 435 /* fall through */ 436 case WLAN_CIPHER_SUITE_WEP40: 437 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 438 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 439 TX_CMD_SEC_WEP_KEY_IDX_MSK); 440 441 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 442 break; 443 case WLAN_CIPHER_SUITE_GCMP: 444 case WLAN_CIPHER_SUITE_GCMP_256: 445 /* TODO: Taking the key from the table might introduce a race 446 * when PTK rekeying is done, having an old packets with a PN 447 * based on the old key but the message encrypted with a new 448 * one. 449 * Need to handle this. 450 */ 451 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE; 452 tx_cmd->key[0] = keyconf->hw_key_idx; 453 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 454 break; 455 default: 456 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 457 } 458 } 459 460 /* 461 * Allocates and sets the Tx cmd the driver data pointers in the skb 462 */ 463 static struct iwl_device_cmd * 464 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 465 struct ieee80211_tx_info *info, int hdrlen, 466 struct ieee80211_sta *sta, u8 sta_id) 467 { 468 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 469 struct iwl_device_cmd *dev_cmd; 470 struct iwl_tx_cmd *tx_cmd; 471 472 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 473 474 if (unlikely(!dev_cmd)) 475 return NULL; 476 477 /* Make sure we zero enough of dev_cmd */ 478 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd)); 479 480 memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd)); 481 dev_cmd->hdr.cmd = TX_CMD; 482 483 if (iwl_mvm_has_new_tx_api(mvm)) { 484 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 485 u16 offload_assist = 0; 486 487 if (ieee80211_is_data_qos(hdr->frame_control)) { 488 u8 *qc = ieee80211_get_qos_ctl(hdr); 489 490 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 491 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 492 } 493 494 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, 495 offload_assist); 496 497 /* padding is inserted later in transport */ 498 if (ieee80211_hdrlen(hdr->frame_control) % 4 && 499 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 500 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 501 502 cmd->offload_assist |= cpu_to_le16(offload_assist); 503 504 /* Total # bytes to be transmitted */ 505 cmd->len = cpu_to_le16((u16)skb->len); 506 507 /* Copy MAC header from skb into command buffer */ 508 memcpy(cmd->hdr, hdr, hdrlen); 509 510 if (!info->control.hw_key) 511 cmd->flags |= cpu_to_le32(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 goto out; 516 517 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE); 518 cmd->rate_n_flags = 519 cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 520 521 goto out; 522 } 523 524 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 525 526 if (info->control.hw_key) 527 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 528 529 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 530 531 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 532 533 /* Copy MAC header from skb into command buffer */ 534 memcpy(tx_cmd->hdr, hdr, hdrlen); 535 536 out: 537 return dev_cmd; 538 } 539 540 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 541 struct iwl_device_cmd *cmd) 542 { 543 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 544 545 memset(&skb_info->status, 0, sizeof(skb_info->status)); 546 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 547 548 skb_info->driver_data[1] = cmd; 549 } 550 551 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 552 struct ieee80211_tx_info *info, __le16 fc) 553 { 554 struct iwl_mvm_vif *mvmvif; 555 556 if (!iwl_mvm_is_dqa_supported(mvm)) 557 return info->hw_queue; 558 559 mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif); 560 561 switch (info->control.vif->type) { 562 case NL80211_IFTYPE_AP: 563 case NL80211_IFTYPE_ADHOC: 564 /* 565 * Handle legacy hostapd as well, where station will be added 566 * only just before sending the association response. 567 * Also take care of the case where we send a deauth to a 568 * station that we don't have, or similarly an association 569 * response (with non-success status) for a station we can't 570 * accept. 571 * Also, disassociate frames might happen, particular with 572 * reason 7 ("Class 3 frame received from nonassociated STA"). 573 */ 574 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc) || 575 ieee80211_is_deauth(fc) || ieee80211_is_assoc_resp(fc) || 576 ieee80211_is_disassoc(fc)) 577 return mvm->probe_queue; 578 if (info->hw_queue == info->control.vif->cab_queue) 579 return mvmvif->cab_queue; 580 581 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 582 "fc=0x%02x", le16_to_cpu(fc)); 583 return mvm->probe_queue; 584 case NL80211_IFTYPE_P2P_DEVICE: 585 if (ieee80211_is_mgmt(fc)) 586 return mvm->p2p_dev_queue; 587 if (info->hw_queue == info->control.vif->cab_queue) 588 return mvmvif->cab_queue; 589 590 WARN_ON_ONCE(1); 591 return mvm->p2p_dev_queue; 592 default: 593 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 594 return -1; 595 } 596 } 597 598 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 599 { 600 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 601 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 602 struct ieee80211_tx_info info; 603 struct iwl_device_cmd *dev_cmd; 604 u8 sta_id; 605 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 606 int queue; 607 608 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used 609 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel 610 * queue. STATION (HS2.0) uses the auxiliary context of the FW, 611 * and hence needs to be sent on the aux queue 612 */ 613 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 614 skb_info->control.vif->type == NL80211_IFTYPE_STATION) 615 skb_info->hw_queue = mvm->aux_queue; 616 617 memcpy(&info, skb->cb, sizeof(info)); 618 619 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 620 return -1; 621 622 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 623 (!info.control.vif || 624 info.hw_queue != info.control.vif->cab_queue))) 625 return -1; 626 627 queue = info.hw_queue; 628 629 /* 630 * If the interface on which the frame is sent is the P2P_DEVICE 631 * or an AP/GO interface use the broadcast station associated 632 * with it; otherwise if the interface is a managed interface 633 * use the AP station associated with it for multicast traffic 634 * (this is not possible for unicast packets as a TLDS discovery 635 * response are sent without a station entry); otherwise use the 636 * AUX station. 637 */ 638 sta_id = mvm->aux_sta.sta_id; 639 if (info.control.vif) { 640 struct iwl_mvm_vif *mvmvif = 641 iwl_mvm_vif_from_mac80211(info.control.vif); 642 643 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 644 info.control.vif->type == NL80211_IFTYPE_AP || 645 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 646 sta_id = mvmvif->bcast_sta.sta_id; 647 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, 648 hdr->frame_control); 649 if (queue < 0) 650 return -1; 651 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 652 is_multicast_ether_addr(hdr->addr1)) { 653 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id); 654 655 if (ap_sta_id != IWL_MVM_INVALID_STA) 656 sta_id = ap_sta_id; 657 } else if (iwl_mvm_is_dqa_supported(mvm) && 658 info.control.vif->type == NL80211_IFTYPE_MONITOR) { 659 queue = mvm->aux_queue; 660 } 661 } 662 663 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 664 665 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 666 if (!dev_cmd) 667 return -1; 668 669 /* From now on, we cannot access info->control */ 670 iwl_mvm_skb_prepare_status(skb, dev_cmd); 671 672 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 673 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 674 return -1; 675 } 676 677 /* 678 * Increase the pending frames counter, so that later when a reply comes 679 * in and the counter is decreased - we don't start getting negative 680 * values. 681 * Note that we don't need to make sure it isn't agg'd, since we're 682 * TXing non-sta 683 * For DQA mode - we shouldn't increase it though 684 */ 685 if (!iwl_mvm_is_dqa_supported(mvm)) 686 atomic_inc(&mvm->pending_frames[sta_id]); 687 688 return 0; 689 } 690 691 #ifdef CONFIG_INET 692 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 693 struct ieee80211_tx_info *info, 694 struct ieee80211_sta *sta, 695 struct sk_buff_head *mpdus_skb) 696 { 697 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 698 struct ieee80211_hdr *hdr = (void *)skb->data; 699 unsigned int mss = skb_shinfo(skb)->gso_size; 700 struct sk_buff *tmp, *next; 701 char cb[sizeof(skb->cb)]; 702 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 703 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 704 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 705 u16 snap_ip_tcp, pad, i = 0; 706 unsigned int dbg_max_amsdu_len; 707 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG; 708 u8 *qc, tid, txf; 709 710 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 711 tcp_hdrlen(skb); 712 713 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len); 714 715 if (!sta->max_amsdu_len || 716 !ieee80211_is_data_qos(hdr->frame_control) || 717 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) { 718 num_subframes = 1; 719 pad = 0; 720 goto segment; 721 } 722 723 qc = ieee80211_get_qos_ctl(hdr); 724 tid = *qc & IEEE80211_QOS_CTL_TID_MASK; 725 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 726 return -EINVAL; 727 728 /* 729 * Do not build AMSDU for IPv6 with extension headers. 730 * ask stack to segment and checkum the generated MPDUs for us. 731 */ 732 if (skb->protocol == htons(ETH_P_IPV6) && 733 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 734 IPPROTO_TCP) { 735 num_subframes = 1; 736 pad = 0; 737 netdev_features &= ~NETIF_F_CSUM_MASK; 738 goto segment; 739 } 740 741 /* 742 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 743 * during an BA session. 744 */ 745 if (info->flags & IEEE80211_TX_CTL_AMPDU && 746 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) { 747 num_subframes = 1; 748 pad = 0; 749 goto segment; 750 } 751 752 max_amsdu_len = sta->max_amsdu_len; 753 754 /* the Tx FIFO to which this A-MSDU will be routed */ 755 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 756 757 /* 758 * Don't send an AMSDU that will be longer than the TXF. 759 * Add a security margin of 256 for the TX command + headers. 760 * We also want to have the start of the next packet inside the 761 * fifo to be able to send bursts. 762 */ 763 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 764 mvm->smem_cfg.lmac[0].txfifo_size[txf] - 256); 765 766 if (unlikely(dbg_max_amsdu_len)) 767 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 768 dbg_max_amsdu_len); 769 770 /* 771 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 772 * supported. This is a spec requirement (IEEE 802.11-2015 773 * section 8.7.3 NOTE 3). 774 */ 775 if (info->flags & IEEE80211_TX_CTL_AMPDU && 776 !sta->vht_cap.vht_supported) 777 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 778 779 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 780 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 781 pad = (4 - subf_len) & 0x3; 782 783 /* 784 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 785 * N * subf_len + (N - 1) * pad. 786 */ 787 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 788 if (num_subframes > 1) 789 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 790 791 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 792 tcp_hdrlen(skb) + skb->data_len; 793 794 /* 795 * Make sure we have enough TBs for the A-MSDU: 796 * 2 for each subframe 797 * 1 more for each fragment 798 * 1 more for the potential data in the header 799 */ 800 num_subframes = 801 min_t(unsigned int, num_subframes, 802 (mvm->trans->max_skb_frags - 1 - 803 skb_shinfo(skb)->nr_frags) / 2); 804 805 /* This skb fits in one single A-MSDU */ 806 if (num_subframes * mss >= tcp_payload_len) { 807 __skb_queue_tail(mpdus_skb, skb); 808 return 0; 809 } 810 811 /* 812 * Trick the segmentation function to make it 813 * create SKBs that can fit into one A-MSDU. 814 */ 815 segment: 816 skb_shinfo(skb)->gso_size = num_subframes * mss; 817 memcpy(cb, skb->cb, sizeof(cb)); 818 819 next = skb_gso_segment(skb, netdev_features); 820 skb_shinfo(skb)->gso_size = mss; 821 if (WARN_ON_ONCE(IS_ERR(next))) 822 return -EINVAL; 823 else if (next) 824 consume_skb(skb); 825 826 while (next) { 827 tmp = next; 828 next = tmp->next; 829 830 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 831 /* 832 * Compute the length of all the data added for the A-MSDU. 833 * This will be used to compute the length to write in the TX 834 * command. We have: SNAP + IP + TCP for n -1 subframes and 835 * ETH header for n subframes. 836 */ 837 tcp_payload_len = skb_tail_pointer(tmp) - 838 skb_transport_header(tmp) - 839 tcp_hdrlen(tmp) + tmp->data_len; 840 841 if (ipv4) 842 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 843 844 if (tcp_payload_len > mss) { 845 skb_shinfo(tmp)->gso_size = mss; 846 } else { 847 if (ieee80211_is_data_qos(hdr->frame_control)) { 848 qc = ieee80211_get_qos_ctl((void *)tmp->data); 849 850 if (ipv4) 851 ip_send_check(ip_hdr(tmp)); 852 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 853 } 854 skb_shinfo(tmp)->gso_size = 0; 855 } 856 857 tmp->prev = NULL; 858 tmp->next = NULL; 859 860 __skb_queue_tail(mpdus_skb, tmp); 861 i++; 862 } 863 864 return 0; 865 } 866 #else /* CONFIG_INET */ 867 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 868 struct ieee80211_tx_info *info, 869 struct ieee80211_sta *sta, 870 struct sk_buff_head *mpdus_skb) 871 { 872 /* Impossible to get TSO with CONFIG_INET */ 873 WARN_ON(1); 874 875 return -1; 876 } 877 #endif 878 879 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, 880 struct iwl_mvm_sta *mvm_sta, u8 tid, 881 struct sk_buff *skb) 882 { 883 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 884 u8 mac_queue = info->hw_queue; 885 struct sk_buff_head *deferred_tx_frames; 886 887 lockdep_assert_held(&mvm_sta->lock); 888 889 mvm_sta->deferred_traffic_tid_map |= BIT(tid); 890 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); 891 892 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; 893 894 skb_queue_tail(deferred_tx_frames, skb); 895 896 /* 897 * The first deferred frame should've stopped the MAC queues, so we 898 * should never get a second deferred frame for the RA/TID. 899 */ 900 if (!WARN(skb_queue_len(deferred_tx_frames) != 1, 901 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid, 902 skb_queue_len(deferred_tx_frames))) { 903 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); 904 schedule_work(&mvm->add_stream_wk); 905 } 906 } 907 908 /* Check if there are any timed-out TIDs on a given shared TXQ */ 909 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 910 { 911 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 912 unsigned long now = jiffies; 913 int tid; 914 915 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 916 return false; 917 918 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 919 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 920 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 921 return true; 922 } 923 924 return false; 925 } 926 927 /* 928 * Sets the fields in the Tx cmd that are crypto related 929 */ 930 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 931 struct ieee80211_tx_info *info, 932 struct ieee80211_sta *sta) 933 { 934 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 935 struct iwl_mvm_sta *mvmsta; 936 struct iwl_device_cmd *dev_cmd; 937 __le16 fc; 938 u16 seq_number = 0; 939 u8 tid = IWL_MAX_TID_COUNT; 940 u16 txq_id = info->hw_queue; 941 bool is_ampdu = false; 942 int hdrlen; 943 944 mvmsta = iwl_mvm_sta_from_mac80211(sta); 945 fc = hdr->frame_control; 946 hdrlen = ieee80211_hdrlen(fc); 947 948 if (WARN_ON_ONCE(!mvmsta)) 949 return -1; 950 951 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 952 return -1; 953 954 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 955 sta, mvmsta->sta_id); 956 if (!dev_cmd) 957 goto drop; 958 959 /* 960 * we handle that entirely ourselves -- for uAPSD the firmware 961 * will always send a notification, and for PS-Poll responses 962 * we'll notify mac80211 when getting frame status 963 */ 964 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 965 966 spin_lock(&mvmsta->lock); 967 968 /* nullfunc frames should go to the MGMT queue regardless of QOS, 969 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 970 * assignment of MGMT TID 971 */ 972 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 973 u8 *qc = NULL; 974 qc = ieee80211_get_qos_ctl(hdr); 975 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 976 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 977 goto drop_unlock_sta; 978 979 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 980 if (WARN_ON_ONCE(is_ampdu && 981 mvmsta->tid_data[tid].state != IWL_AGG_ON)) 982 goto drop_unlock_sta; 983 984 seq_number = mvmsta->tid_data[tid].seq_number; 985 seq_number &= IEEE80211_SCTL_SEQ; 986 987 if (!iwl_mvm_has_new_tx_api(mvm)) { 988 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 989 990 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 991 hdr->seq_ctrl |= cpu_to_le16(seq_number); 992 /* update the tx_cmd hdr as it was already copied */ 993 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 994 } 995 } 996 997 if (iwl_mvm_is_dqa_supported(mvm) || is_ampdu) 998 txq_id = mvmsta->tid_data[tid].txq_id; 999 1000 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) { 1001 /* default to TID 0 for non-QoS packets */ 1002 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; 1003 1004 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; 1005 } 1006 1007 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1008 1009 /* Check if TXQ needs to be allocated or re-activated */ 1010 if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE || 1011 !mvmsta->tid_data[tid].is_tid_active) && 1012 iwl_mvm_is_dqa_supported(mvm)) { 1013 /* If TXQ needs to be allocated... */ 1014 if (txq_id == IWL_MVM_INVALID_QUEUE) { 1015 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); 1016 1017 /* 1018 * The frame is now deferred, and the worker scheduled 1019 * will re-allocate it, so we can free it for now. 1020 */ 1021 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1022 spin_unlock(&mvmsta->lock); 1023 return 0; 1024 } 1025 1026 /* queue should always be active in new TX path */ 1027 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1028 1029 /* If we are here - TXQ exists and needs to be re-activated */ 1030 spin_lock(&mvm->queue_info_lock); 1031 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1032 mvmsta->tid_data[tid].is_tid_active = true; 1033 spin_unlock(&mvm->queue_info_lock); 1034 1035 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n", 1036 txq_id); 1037 } 1038 1039 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) { 1040 /* Keep track of the time of the last frame for this RA/TID */ 1041 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1042 1043 /* 1044 * If we have timed-out TIDs - schedule the worker that will 1045 * reconfig the queues and update them 1046 * 1047 * Note that the mvm->queue_info_lock isn't being taken here in 1048 * order to not serialize the TX flow. This isn't dangerous 1049 * because scheduling mvm->add_stream_wk can't ruin the state, 1050 * and if we DON'T schedule it due to some race condition then 1051 * next TX we get here we will. 1052 */ 1053 if (unlikely(mvm->queue_info[txq_id].status == 1054 IWL_MVM_QUEUE_SHARED && 1055 iwl_mvm_txq_should_update(mvm, txq_id))) 1056 schedule_work(&mvm->add_stream_wk); 1057 } 1058 1059 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 1060 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 1061 1062 /* From now on, we cannot access info->control */ 1063 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1064 1065 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1066 goto drop_unlock_sta; 1067 1068 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1069 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1070 1071 spin_unlock(&mvmsta->lock); 1072 1073 /* Increase pending frames count if this isn't AMPDU or DQA queue */ 1074 if (!iwl_mvm_is_dqa_supported(mvm) && !is_ampdu) 1075 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); 1076 1077 return 0; 1078 1079 drop_unlock_sta: 1080 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1081 spin_unlock(&mvmsta->lock); 1082 drop: 1083 return -1; 1084 } 1085 1086 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 1087 struct ieee80211_sta *sta) 1088 { 1089 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1090 struct ieee80211_tx_info info; 1091 struct sk_buff_head mpdus_skbs; 1092 unsigned int payload_len; 1093 int ret; 1094 1095 if (WARN_ON_ONCE(!mvmsta)) 1096 return -1; 1097 1098 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1099 return -1; 1100 1101 memcpy(&info, skb->cb, sizeof(info)); 1102 1103 if (!skb_is_gso(skb)) 1104 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1105 1106 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1107 tcp_hdrlen(skb) + skb->data_len; 1108 1109 if (payload_len <= skb_shinfo(skb)->gso_size) 1110 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1111 1112 __skb_queue_head_init(&mpdus_skbs); 1113 1114 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1115 if (ret) 1116 return ret; 1117 1118 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1119 return ret; 1120 1121 while (!skb_queue_empty(&mpdus_skbs)) { 1122 skb = __skb_dequeue(&mpdus_skbs); 1123 1124 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1125 if (ret) { 1126 __skb_queue_purge(&mpdus_skbs); 1127 return ret; 1128 } 1129 } 1130 1131 return 0; 1132 } 1133 1134 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1135 struct ieee80211_sta *sta, u8 tid) 1136 { 1137 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1138 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1139 struct ieee80211_vif *vif = mvmsta->vif; 1140 u16 normalized_ssn; 1141 1142 lockdep_assert_held(&mvmsta->lock); 1143 1144 if ((tid_data->state == IWL_AGG_ON || 1145 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA || 1146 iwl_mvm_is_dqa_supported(mvm)) && 1147 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1148 /* 1149 * Now that this aggregation or DQA queue is empty tell 1150 * mac80211 so it knows we no longer have frames buffered for 1151 * the station on this TID (for the TIM bitmap calculation.) 1152 */ 1153 ieee80211_sta_set_buffered(sta, tid, false); 1154 } 1155 1156 /* 1157 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 1158 * to align the wrap around of ssn so we compare relevant values. 1159 */ 1160 normalized_ssn = tid_data->ssn; 1161 if (mvm->trans->cfg->gen2) 1162 normalized_ssn &= 0xff; 1163 1164 if (normalized_ssn != tid_data->next_reclaimed) 1165 return; 1166 1167 switch (tid_data->state) { 1168 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1169 IWL_DEBUG_TX_QUEUES(mvm, 1170 "Can continue addBA flow ssn = next_recl = %d\n", 1171 tid_data->next_reclaimed); 1172 tid_data->state = IWL_AGG_STARTING; 1173 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1174 break; 1175 1176 case IWL_EMPTYING_HW_QUEUE_DELBA: 1177 IWL_DEBUG_TX_QUEUES(mvm, 1178 "Can continue DELBA flow ssn = next_recl = %d\n", 1179 tid_data->next_reclaimed); 1180 if (!iwl_mvm_is_dqa_supported(mvm)) { 1181 u8 mac80211_ac = tid_to_mac80211_ac[tid]; 1182 1183 iwl_mvm_disable_txq(mvm, tid_data->txq_id, 1184 vif->hw_queue[mac80211_ac], tid, 1185 CMD_ASYNC); 1186 } 1187 tid_data->state = IWL_AGG_OFF; 1188 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1189 break; 1190 1191 default: 1192 break; 1193 } 1194 } 1195 1196 #ifdef CONFIG_IWLWIFI_DEBUG 1197 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1198 { 1199 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1200 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1201 1202 switch (status & TX_STATUS_MSK) { 1203 case TX_STATUS_SUCCESS: 1204 return "SUCCESS"; 1205 TX_STATUS_POSTPONE(DELAY); 1206 TX_STATUS_POSTPONE(FEW_BYTES); 1207 TX_STATUS_POSTPONE(BT_PRIO); 1208 TX_STATUS_POSTPONE(QUIET_PERIOD); 1209 TX_STATUS_POSTPONE(CALC_TTAK); 1210 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1211 TX_STATUS_FAIL(SHORT_LIMIT); 1212 TX_STATUS_FAIL(LONG_LIMIT); 1213 TX_STATUS_FAIL(UNDERRUN); 1214 TX_STATUS_FAIL(DRAIN_FLOW); 1215 TX_STATUS_FAIL(RFKILL_FLUSH); 1216 TX_STATUS_FAIL(LIFE_EXPIRE); 1217 TX_STATUS_FAIL(DEST_PS); 1218 TX_STATUS_FAIL(HOST_ABORTED); 1219 TX_STATUS_FAIL(BT_RETRY); 1220 TX_STATUS_FAIL(STA_INVALID); 1221 TX_STATUS_FAIL(FRAG_DROPPED); 1222 TX_STATUS_FAIL(TID_DISABLE); 1223 TX_STATUS_FAIL(FIFO_FLUSHED); 1224 TX_STATUS_FAIL(SMALL_CF_POLL); 1225 TX_STATUS_FAIL(FW_DROP); 1226 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1227 } 1228 1229 return "UNKNOWN"; 1230 1231 #undef TX_STATUS_FAIL 1232 #undef TX_STATUS_POSTPONE 1233 } 1234 #endif /* CONFIG_IWLWIFI_DEBUG */ 1235 1236 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1237 enum nl80211_band band, 1238 struct ieee80211_tx_rate *r) 1239 { 1240 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1241 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1242 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1243 case RATE_MCS_CHAN_WIDTH_20: 1244 break; 1245 case RATE_MCS_CHAN_WIDTH_40: 1246 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1247 break; 1248 case RATE_MCS_CHAN_WIDTH_80: 1249 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1250 break; 1251 case RATE_MCS_CHAN_WIDTH_160: 1252 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1253 break; 1254 } 1255 if (rate_n_flags & RATE_MCS_SGI_MSK) 1256 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1257 if (rate_n_flags & RATE_MCS_HT_MSK) { 1258 r->flags |= IEEE80211_TX_RC_MCS; 1259 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1260 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1261 ieee80211_rate_set_vht( 1262 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1263 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1264 RATE_VHT_MCS_NSS_POS) + 1); 1265 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1266 } else { 1267 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1268 band); 1269 } 1270 } 1271 1272 /** 1273 * translate ucode response to mac80211 tx status control values 1274 */ 1275 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1276 struct ieee80211_tx_info *info) 1277 { 1278 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1279 1280 info->status.antenna = 1281 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1282 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1283 } 1284 1285 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1286 u32 status) 1287 { 1288 struct iwl_fw_dbg_trigger_tlv *trig; 1289 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1290 int i; 1291 1292 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) 1293 return; 1294 1295 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); 1296 status_trig = (void *)trig->data; 1297 1298 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) 1299 return; 1300 1301 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1302 /* don't collect on status 0 */ 1303 if (!status_trig->statuses[i].status) 1304 break; 1305 1306 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1307 continue; 1308 1309 iwl_mvm_fw_dbg_collect_trig(mvm, trig, 1310 "Tx status %d was received", 1311 status & TX_STATUS_MSK); 1312 break; 1313 } 1314 } 1315 1316 /** 1317 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1318 * @tx_resp: the Tx response from the fw (agg or non-agg) 1319 * 1320 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1321 * it can't know that everything will go well until the end of the AMPDU, it 1322 * can't know in advance the number of MPDUs that will be sent in the current 1323 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1324 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1325 * of the batch. This is why the SSN of the SCD is written at the end of the 1326 * whole struct at a variable offset. This function knows how to cope with the 1327 * variable offset and returns the SSN of the SCD. 1328 */ 1329 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1330 struct iwl_mvm_tx_resp *tx_resp) 1331 { 1332 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1333 tx_resp->frame_count) & 0xfff; 1334 } 1335 1336 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1337 struct iwl_rx_packet *pkt) 1338 { 1339 struct ieee80211_sta *sta; 1340 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1341 int txq_id = SEQ_TO_QUEUE(sequence); 1342 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1343 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1344 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1345 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1346 struct agg_tx_status *agg_status = 1347 iwl_mvm_get_agg_status(mvm, tx_resp); 1348 u32 status = le16_to_cpu(agg_status->status); 1349 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1350 struct iwl_mvm_sta *mvmsta; 1351 struct sk_buff_head skbs; 1352 u8 skb_freed = 0; 1353 u8 lq_color; 1354 u16 next_reclaimed, seq_ctl; 1355 bool is_ndp = false; 1356 1357 __skb_queue_head_init(&skbs); 1358 1359 if (iwl_mvm_has_new_tx_api(mvm)) 1360 txq_id = le16_to_cpu(tx_resp->tx_queue); 1361 1362 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1363 1364 /* we can free until ssn % q.n_bd not inclusive */ 1365 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1366 1367 while (!skb_queue_empty(&skbs)) { 1368 struct sk_buff *skb = __skb_dequeue(&skbs); 1369 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1370 1371 skb_freed++; 1372 1373 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1374 1375 memset(&info->status, 0, sizeof(info->status)); 1376 1377 /* inform mac80211 about what happened with the frame */ 1378 switch (status & TX_STATUS_MSK) { 1379 case TX_STATUS_SUCCESS: 1380 case TX_STATUS_DIRECT_DONE: 1381 info->flags |= IEEE80211_TX_STAT_ACK; 1382 break; 1383 case TX_STATUS_FAIL_DEST_PS: 1384 /* In DQA, the FW should have stopped the queue and not 1385 * return this status 1386 */ 1387 WARN_ON(iwl_mvm_is_dqa_supported(mvm)); 1388 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1389 break; 1390 default: 1391 break; 1392 } 1393 1394 iwl_mvm_tx_status_check_trigger(mvm, status); 1395 1396 info->status.rates[0].count = tx_resp->failure_frame + 1; 1397 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1398 info); 1399 info->status.status_driver_data[1] = 1400 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1401 1402 /* Single frame failure in an AMPDU queue => send BAR */ 1403 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1404 !(info->flags & IEEE80211_TX_STAT_ACK) && 1405 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) 1406 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1407 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1408 1409 /* W/A FW bug: seq_ctl is wrong when the status isn't success */ 1410 if (status != TX_STATUS_SUCCESS) { 1411 struct ieee80211_hdr *hdr = (void *)skb->data; 1412 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1413 } 1414 1415 if (unlikely(!seq_ctl)) { 1416 struct ieee80211_hdr *hdr = (void *)skb->data; 1417 1418 /* 1419 * If it is an NDP, we can't update next_reclaim since 1420 * its sequence control is 0. Note that for that same 1421 * reason, NDPs are never sent to A-MPDU'able queues 1422 * so that we can never have more than one freed frame 1423 * for a single Tx resonse (see WARN_ON below). 1424 */ 1425 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1426 is_ndp = true; 1427 } 1428 1429 /* 1430 * TODO: this is not accurate if we are freeing more than one 1431 * packet. 1432 */ 1433 info->status.tx_time = 1434 le16_to_cpu(tx_resp->wireless_media_time); 1435 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1436 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1437 info->status.status_driver_data[0] = 1438 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1439 1440 ieee80211_tx_status(mvm->hw, skb); 1441 } 1442 1443 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) { 1444 /* If this is an aggregation queue, we use the ssn since: 1445 * ssn = wifi seq_num % 256. 1446 * The seq_ctl is the sequence control of the packet to which 1447 * this Tx response relates. But if there is a hole in the 1448 * bitmap of the BA we received, this Tx response may allow to 1449 * reclaim the hole and all the subsequent packets that were 1450 * already acked. In that case, seq_ctl != ssn, and the next 1451 * packet to be reclaimed will be ssn and not seq_ctl. In that 1452 * case, several packets will be reclaimed even if 1453 * frame_count = 1. 1454 * 1455 * The ssn is the index (% 256) of the latest packet that has 1456 * treated (acked / dropped) + 1. 1457 */ 1458 next_reclaimed = ssn; 1459 } else { 1460 /* The next packet to be reclaimed is the one after this one */ 1461 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); 1462 } 1463 1464 IWL_DEBUG_TX_REPLY(mvm, 1465 "TXQ %d status %s (0x%08x)\n", 1466 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1467 1468 IWL_DEBUG_TX_REPLY(mvm, 1469 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1470 le32_to_cpu(tx_resp->initial_rate), 1471 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1472 ssn, next_reclaimed, seq_ctl); 1473 1474 rcu_read_lock(); 1475 1476 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1477 /* 1478 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1479 * the firmware while we still have packets for it in the Tx queues. 1480 */ 1481 if (WARN_ON_ONCE(!sta)) 1482 goto out; 1483 1484 if (!IS_ERR(sta)) { 1485 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1486 1487 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) { 1488 struct iwl_mvm_tid_data *tid_data = 1489 &mvmsta->tid_data[tid]; 1490 bool send_eosp_ndp = false; 1491 1492 spin_lock_bh(&mvmsta->lock); 1493 1494 if (!is_ndp) { 1495 tid_data->next_reclaimed = next_reclaimed; 1496 IWL_DEBUG_TX_REPLY(mvm, 1497 "Next reclaimed packet:%d\n", 1498 next_reclaimed); 1499 } else { 1500 IWL_DEBUG_TX_REPLY(mvm, 1501 "NDP - don't update next_reclaimed\n"); 1502 } 1503 1504 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1505 1506 if (mvmsta->sleep_tx_count) { 1507 mvmsta->sleep_tx_count--; 1508 if (mvmsta->sleep_tx_count && 1509 !iwl_mvm_tid_queued(mvm, tid_data)) { 1510 /* 1511 * The number of frames in the queue 1512 * dropped to 0 even if we sent less 1513 * frames than we thought we had on the 1514 * Tx queue. 1515 * This means we had holes in the BA 1516 * window that we just filled, ask 1517 * mac80211 to send EOSP since the 1518 * firmware won't know how to do that. 1519 * Send NDP and the firmware will send 1520 * EOSP notification that will trigger 1521 * a call to ieee80211_sta_eosp(). 1522 */ 1523 send_eosp_ndp = true; 1524 } 1525 } 1526 1527 spin_unlock_bh(&mvmsta->lock); 1528 if (send_eosp_ndp) { 1529 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1530 IEEE80211_FRAME_RELEASE_UAPSD, 1531 1, tid, false, false); 1532 mvmsta->sleep_tx_count = 0; 1533 ieee80211_send_eosp_nullfunc(sta, tid); 1534 } 1535 } 1536 1537 if (mvmsta->next_status_eosp) { 1538 mvmsta->next_status_eosp = false; 1539 ieee80211_sta_eosp(sta); 1540 } 1541 } else { 1542 mvmsta = NULL; 1543 } 1544 1545 /* 1546 * If the txq is not an AMPDU queue, there is no chance we freed 1547 * several skbs. Check that out... 1548 */ 1549 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) 1550 goto out; 1551 1552 /* We can't free more than one frame at once on a shared queue */ 1553 WARN_ON(skb_freed > 1); 1554 1555 /* If we have still frames for this STA nothing to do here */ 1556 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) 1557 goto out; 1558 1559 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { 1560 1561 /* 1562 * If there are no pending frames for this STA and 1563 * the tx to this station is not disabled, notify 1564 * mac80211 that this station can now wake up in its 1565 * STA table. 1566 * If mvmsta is not NULL, sta is valid. 1567 */ 1568 1569 spin_lock_bh(&mvmsta->lock); 1570 1571 if (!mvmsta->disable_tx) 1572 ieee80211_sta_block_awake(mvm->hw, sta, false); 1573 1574 spin_unlock_bh(&mvmsta->lock); 1575 } 1576 1577 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { 1578 /* 1579 * We are draining and this was the last packet - pre_rcu_remove 1580 * has been called already. We might be after the 1581 * synchronize_net already. 1582 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. 1583 */ 1584 set_bit(sta_id, mvm->sta_drained); 1585 schedule_work(&mvm->sta_drained_wk); 1586 } 1587 1588 out: 1589 rcu_read_unlock(); 1590 } 1591 1592 #ifdef CONFIG_IWLWIFI_DEBUG 1593 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1594 static const char *iwl_get_agg_tx_status(u16 status) 1595 { 1596 switch (status & AGG_TX_STATE_STATUS_MSK) { 1597 AGG_TX_STATE_(TRANSMITTED); 1598 AGG_TX_STATE_(UNDERRUN); 1599 AGG_TX_STATE_(BT_PRIO); 1600 AGG_TX_STATE_(FEW_BYTES); 1601 AGG_TX_STATE_(ABORT); 1602 AGG_TX_STATE_(LAST_SENT_TTL); 1603 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1604 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1605 AGG_TX_STATE_(SCD_QUERY); 1606 AGG_TX_STATE_(TEST_BAD_CRC32); 1607 AGG_TX_STATE_(RESPONSE); 1608 AGG_TX_STATE_(DUMP_TX); 1609 AGG_TX_STATE_(DELAY_TX); 1610 } 1611 1612 return "UNKNOWN"; 1613 } 1614 1615 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1616 struct iwl_rx_packet *pkt) 1617 { 1618 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1619 struct agg_tx_status *frame_status = 1620 iwl_mvm_get_agg_status(mvm, tx_resp); 1621 int i; 1622 1623 for (i = 0; i < tx_resp->frame_count; i++) { 1624 u16 fstatus = le16_to_cpu(frame_status[i].status); 1625 1626 IWL_DEBUG_TX_REPLY(mvm, 1627 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1628 iwl_get_agg_tx_status(fstatus), 1629 fstatus & AGG_TX_STATE_STATUS_MSK, 1630 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1631 AGG_TX_STATE_TRY_CNT_POS, 1632 le16_to_cpu(frame_status[i].sequence)); 1633 } 1634 } 1635 #else 1636 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1637 struct iwl_rx_packet *pkt) 1638 {} 1639 #endif /* CONFIG_IWLWIFI_DEBUG */ 1640 1641 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1642 struct iwl_rx_packet *pkt) 1643 { 1644 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1645 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1646 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1647 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1648 struct iwl_mvm_sta *mvmsta; 1649 int queue = SEQ_TO_QUEUE(sequence); 1650 1651 if (WARN_ON_ONCE(queue < mvm->first_agg_queue && 1652 (!iwl_mvm_is_dqa_supported(mvm) || 1653 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))) 1654 return; 1655 1656 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) 1657 return; 1658 1659 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1660 1661 rcu_read_lock(); 1662 1663 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1664 1665 if (!WARN_ON_ONCE(!mvmsta)) { 1666 mvmsta->tid_data[tid].rate_n_flags = 1667 le32_to_cpu(tx_resp->initial_rate); 1668 mvmsta->tid_data[tid].tx_time = 1669 le16_to_cpu(tx_resp->wireless_media_time); 1670 mvmsta->tid_data[tid].lq_color = 1671 (tx_resp->tlc_info & TX_RES_RATE_TABLE_COLOR_MSK) >> 1672 TX_RES_RATE_TABLE_COLOR_POS; 1673 } 1674 1675 rcu_read_unlock(); 1676 } 1677 1678 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1679 { 1680 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1681 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1682 1683 if (tx_resp->frame_count == 1) 1684 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1685 else 1686 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1687 } 1688 1689 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1690 int txq, int index, 1691 struct ieee80211_tx_info *ba_info, u32 rate) 1692 { 1693 struct sk_buff_head reclaimed_skbs; 1694 struct iwl_mvm_tid_data *tid_data; 1695 struct ieee80211_sta *sta; 1696 struct iwl_mvm_sta *mvmsta; 1697 struct sk_buff *skb; 1698 int freed; 1699 1700 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1701 tid >= IWL_MAX_TID_COUNT, 1702 "sta_id %d tid %d", sta_id, tid)) 1703 return; 1704 1705 rcu_read_lock(); 1706 1707 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1708 1709 /* Reclaiming frames for a station that has been deleted ? */ 1710 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1711 rcu_read_unlock(); 1712 return; 1713 } 1714 1715 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1716 tid_data = &mvmsta->tid_data[tid]; 1717 1718 if (tid_data->txq_id != txq) { 1719 IWL_ERR(mvm, 1720 "invalid BA notification: Q %d, tid %d\n", 1721 tid_data->txq_id, tid); 1722 rcu_read_unlock(); 1723 return; 1724 } 1725 1726 spin_lock_bh(&mvmsta->lock); 1727 1728 __skb_queue_head_init(&reclaimed_skbs); 1729 1730 /* 1731 * Release all TFDs before the SSN, i.e. all TFDs in front of 1732 * block-ack window (we assume that they've been successfully 1733 * transmitted ... if not, it's too late anyway). 1734 */ 1735 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1736 1737 tid_data->next_reclaimed = index; 1738 1739 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1740 1741 freed = 0; 1742 1743 /* pack lq color from tid_data along the reduced txp */ 1744 ba_info->status.status_driver_data[0] = 1745 RS_DRV_DATA_PACK(tid_data->lq_color, 1746 ba_info->status.status_driver_data[0]); 1747 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1748 1749 skb_queue_walk(&reclaimed_skbs, skb) { 1750 struct ieee80211_hdr *hdr = (void *)skb->data; 1751 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1752 1753 if (ieee80211_is_data_qos(hdr->frame_control)) 1754 freed++; 1755 else 1756 WARN_ON_ONCE(1); 1757 1758 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1759 1760 memset(&info->status, 0, sizeof(info->status)); 1761 /* Packet was transmitted successfully, failures come as single 1762 * frames because before failing a frame the firmware transmits 1763 * it without aggregation at least once. 1764 */ 1765 info->flags |= IEEE80211_TX_STAT_ACK; 1766 1767 /* this is the first skb we deliver in this batch */ 1768 /* put the rate scaling data there */ 1769 if (freed == 1) { 1770 info->flags |= IEEE80211_TX_STAT_AMPDU; 1771 memcpy(&info->status, &ba_info->status, 1772 sizeof(ba_info->status)); 1773 iwl_mvm_hwrate_to_tx_status(rate, info); 1774 } 1775 } 1776 1777 spin_unlock_bh(&mvmsta->lock); 1778 1779 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1780 * possible (i.e. first MPDU in the aggregation wasn't acked) 1781 * Still it's important to update RS about sent vs. acked. 1782 */ 1783 if (skb_queue_empty(&reclaimed_skbs)) { 1784 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1785 1786 if (mvmsta->vif) 1787 chanctx_conf = 1788 rcu_dereference(mvmsta->vif->chanctx_conf); 1789 1790 if (WARN_ON_ONCE(!chanctx_conf)) 1791 goto out; 1792 1793 ba_info->band = chanctx_conf->def.chan->band; 1794 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1795 1796 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 1797 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1798 } 1799 1800 out: 1801 rcu_read_unlock(); 1802 1803 while (!skb_queue_empty(&reclaimed_skbs)) { 1804 skb = __skb_dequeue(&reclaimed_skbs); 1805 ieee80211_tx_status(mvm->hw, skb); 1806 } 1807 } 1808 1809 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1810 { 1811 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1812 int sta_id, tid, txq, index; 1813 struct ieee80211_tx_info ba_info = {}; 1814 struct iwl_mvm_ba_notif *ba_notif; 1815 struct iwl_mvm_tid_data *tid_data; 1816 struct iwl_mvm_sta *mvmsta; 1817 1818 if (iwl_mvm_has_new_tx_api(mvm)) { 1819 struct iwl_mvm_compressed_ba_notif *ba_res = 1820 (void *)pkt->data; 1821 int i; 1822 1823 sta_id = ba_res->sta_id; 1824 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1825 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1826 ba_info.status.tx_time = 1827 (u16)le32_to_cpu(ba_res->wireless_time); 1828 ba_info.status.status_driver_data[0] = 1829 (void *)(uintptr_t)ba_res->reduced_txp; 1830 1831 if (!le16_to_cpu(ba_res->tfd_cnt)) 1832 goto out; 1833 1834 /* Free per TID */ 1835 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { 1836 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1837 &ba_res->tfd[i]; 1838 1839 iwl_mvm_tx_reclaim(mvm, sta_id, ba_tfd->tid, 1840 (int)(le16_to_cpu(ba_tfd->q_num)), 1841 le16_to_cpu(ba_tfd->tfd_index), 1842 &ba_info, 1843 le32_to_cpu(ba_res->tx_rate)); 1844 } 1845 1846 out: 1847 IWL_DEBUG_TX_REPLY(mvm, 1848 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1849 sta_id, le32_to_cpu(ba_res->flags), 1850 le16_to_cpu(ba_res->txed), 1851 le16_to_cpu(ba_res->done)); 1852 return; 1853 } 1854 1855 ba_notif = (void *)pkt->data; 1856 sta_id = ba_notif->sta_id; 1857 tid = ba_notif->tid; 1858 /* "flow" corresponds to Tx queue */ 1859 txq = le16_to_cpu(ba_notif->scd_flow); 1860 /* "ssn" is start of block-ack Tx window, corresponds to index 1861 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1862 index = le16_to_cpu(ba_notif->scd_ssn); 1863 1864 rcu_read_lock(); 1865 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1866 if (WARN_ON_ONCE(!mvmsta)) { 1867 rcu_read_unlock(); 1868 return; 1869 } 1870 1871 tid_data = &mvmsta->tid_data[tid]; 1872 1873 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1874 ba_info.status.ampdu_len = ba_notif->txed; 1875 ba_info.status.tx_time = tid_data->tx_time; 1876 ba_info.status.status_driver_data[0] = 1877 (void *)(uintptr_t)ba_notif->reduced_txp; 1878 1879 rcu_read_unlock(); 1880 1881 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1882 tid_data->rate_n_flags); 1883 1884 IWL_DEBUG_TX_REPLY(mvm, 1885 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1886 ba_notif->sta_addr, ba_notif->sta_id); 1887 1888 IWL_DEBUG_TX_REPLY(mvm, 1889 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1890 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1891 le64_to_cpu(ba_notif->bitmap), txq, index, 1892 ba_notif->txed, ba_notif->txed_2_done); 1893 1894 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1895 ba_notif->reduced_txp); 1896 } 1897 1898 /* 1899 * Note that there are transports that buffer frames before they reach 1900 * the firmware. This means that after flush_tx_path is called, the 1901 * queue might not be empty. The race-free way to handle this is to: 1902 * 1) set the station as draining 1903 * 2) flush the Tx path 1904 * 3) wait for the transport queues to be empty 1905 */ 1906 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 1907 { 1908 int ret; 1909 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 1910 .queues_ctl = cpu_to_le32(tfd_msk), 1911 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 1912 }; 1913 1914 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1915 1916 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1917 sizeof(flush_cmd), &flush_cmd); 1918 if (ret) 1919 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1920 return ret; 1921 } 1922 1923 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, 1924 u16 tids, u32 flags) 1925 { 1926 int ret; 1927 struct iwl_tx_path_flush_cmd flush_cmd = { 1928 .sta_id = cpu_to_le32(sta_id), 1929 .tid_mask = cpu_to_le16(tids), 1930 }; 1931 1932 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 1933 1934 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1935 sizeof(flush_cmd), &flush_cmd); 1936 if (ret) 1937 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1938 return ret; 1939 } 1940 1941 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags) 1942 { 1943 struct iwl_mvm_int_sta *int_sta = sta; 1944 struct iwl_mvm_sta *mvm_sta = sta; 1945 1946 if (iwl_mvm_has_new_tx_api(mvm)) { 1947 if (internal) 1948 return iwl_mvm_flush_sta_tids(mvm, int_sta->sta_id, 1949 BIT(IWL_MGMT_TID), flags); 1950 1951 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 1952 0xFF, flags); 1953 } 1954 1955 if (internal) 1956 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 1957 flags); 1958 1959 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags); 1960 } 1961