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 { 110 u16 offload_assist = 0; 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 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 tx_cmd->offload_assist |= 229 cpu_to_le16(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 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU)))) 295 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD)); 296 297 tx_cmd->offload_assist |= 298 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info)); 299 } 300 301 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 302 struct ieee80211_tx_info *info, 303 struct ieee80211_sta *sta) 304 { 305 int rate_idx; 306 u8 rate_plcp; 307 u32 rate_flags; 308 309 /* HT rate doesn't make sense for a non data frame */ 310 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, 311 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n", 312 info->control.rates[0].flags, 313 info->control.rates[0].idx); 314 315 rate_idx = info->control.rates[0].idx; 316 /* if the rate isn't a well known legacy rate, take the lowest one */ 317 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 318 rate_idx = rate_lowest_index( 319 &mvm->nvm_data->bands[info->band], sta); 320 321 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 322 if (info->band == NL80211_BAND_5GHZ) 323 rate_idx += IWL_FIRST_OFDM_RATE; 324 325 /* For 2.4 GHZ band, check that there is no need to remap */ 326 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 327 328 /* Get PLCP rate for tx_cmd->rate_n_flags */ 329 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 330 331 if (info->band == NL80211_BAND_2GHZ && 332 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 333 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 334 else 335 rate_flags = 336 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 337 338 /* Set CCK flag as needed */ 339 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 340 rate_flags |= RATE_MCS_CCK_MSK; 341 342 return (u32)rate_plcp | rate_flags; 343 } 344 345 /* 346 * Sets the fields in the Tx cmd that are rate related 347 */ 348 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 349 struct ieee80211_tx_info *info, 350 struct ieee80211_sta *sta, __le16 fc) 351 { 352 /* Set retry limit on RTS packets */ 353 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 354 355 /* Set retry limit on DATA packets and Probe Responses*/ 356 if (ieee80211_is_probe_resp(fc)) { 357 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 358 tx_cmd->rts_retry_limit = 359 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 360 } else if (ieee80211_is_back_req(fc)) { 361 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 362 } else { 363 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 364 } 365 366 /* 367 * for data packets, rate info comes from the table inside the fw. This 368 * table is controlled by LINK_QUALITY commands 369 */ 370 371 if (ieee80211_is_data(fc) && sta) { 372 tx_cmd->initial_rate_index = 0; 373 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 374 return; 375 } else if (ieee80211_is_back_req(fc)) { 376 tx_cmd->tx_flags |= 377 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 378 } 379 380 mvm->mgmt_last_antenna_idx = 381 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 382 mvm->mgmt_last_antenna_idx); 383 384 /* Set the rate in the TX cmd */ 385 tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 386 } 387 388 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 389 u8 *crypto_hdr) 390 { 391 struct ieee80211_key_conf *keyconf = info->control.hw_key; 392 u64 pn; 393 394 pn = atomic64_inc_return(&keyconf->tx_pn); 395 crypto_hdr[0] = pn; 396 crypto_hdr[2] = 0; 397 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 398 crypto_hdr[1] = pn >> 8; 399 crypto_hdr[4] = pn >> 16; 400 crypto_hdr[5] = pn >> 24; 401 crypto_hdr[6] = pn >> 32; 402 crypto_hdr[7] = pn >> 40; 403 } 404 405 /* 406 * Sets the fields in the Tx cmd that are crypto related 407 */ 408 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 409 struct ieee80211_tx_info *info, 410 struct iwl_tx_cmd *tx_cmd, 411 struct sk_buff *skb_frag, 412 int hdrlen) 413 { 414 struct ieee80211_key_conf *keyconf = info->control.hw_key; 415 u8 *crypto_hdr = skb_frag->data + hdrlen; 416 u64 pn; 417 418 switch (keyconf->cipher) { 419 case WLAN_CIPHER_SUITE_CCMP: 420 case WLAN_CIPHER_SUITE_CCMP_256: 421 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 422 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 423 break; 424 425 case WLAN_CIPHER_SUITE_TKIP: 426 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 427 pn = atomic64_inc_return(&keyconf->tx_pn); 428 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 429 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 430 break; 431 432 case WLAN_CIPHER_SUITE_WEP104: 433 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 434 /* fall through */ 435 case WLAN_CIPHER_SUITE_WEP40: 436 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 437 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 438 TX_CMD_SEC_WEP_KEY_IDX_MSK); 439 440 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 441 break; 442 case WLAN_CIPHER_SUITE_GCMP: 443 case WLAN_CIPHER_SUITE_GCMP_256: 444 /* TODO: Taking the key from the table might introduce a race 445 * when PTK rekeying is done, having an old packets with a PN 446 * based on the old key but the message encrypted with a new 447 * one. 448 * Need to handle this. 449 */ 450 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE; 451 tx_cmd->key[0] = keyconf->hw_key_idx; 452 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 453 break; 454 default: 455 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 456 } 457 } 458 459 /* 460 * Allocates and sets the Tx cmd the driver data pointers in the skb 461 */ 462 static struct iwl_device_cmd * 463 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 464 struct ieee80211_tx_info *info, int hdrlen, 465 struct ieee80211_sta *sta, u8 sta_id) 466 { 467 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 468 struct iwl_device_cmd *dev_cmd; 469 struct iwl_tx_cmd *tx_cmd; 470 471 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 472 473 if (unlikely(!dev_cmd)) 474 return NULL; 475 476 memset(dev_cmd, 0, sizeof(*dev_cmd)); 477 dev_cmd->hdr.cmd = TX_CMD; 478 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 479 480 if (info->control.hw_key) 481 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 482 483 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 484 485 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 486 487 return dev_cmd; 488 } 489 490 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 491 struct iwl_device_cmd *cmd) 492 { 493 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 494 495 memset(&skb_info->status, 0, sizeof(skb_info->status)); 496 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 497 498 skb_info->driver_data[1] = cmd; 499 } 500 501 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 502 struct ieee80211_tx_info *info, __le16 fc) 503 { 504 if (!iwl_mvm_is_dqa_supported(mvm)) 505 return info->hw_queue; 506 507 switch (info->control.vif->type) { 508 case NL80211_IFTYPE_AP: 509 case NL80211_IFTYPE_ADHOC: 510 /* 511 * Handle legacy hostapd as well, where station may be added 512 * only after assoc. Take care of the case where we send a 513 * deauth to a station that we don't have. 514 */ 515 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc) || 516 ieee80211_is_deauth(fc)) 517 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; 518 if (info->hw_queue == info->control.vif->cab_queue) 519 return info->hw_queue; 520 521 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 522 "fc=0x%02x", le16_to_cpu(fc)); 523 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; 524 case NL80211_IFTYPE_P2P_DEVICE: 525 if (ieee80211_is_mgmt(fc)) 526 return IWL_MVM_DQA_P2P_DEVICE_QUEUE; 527 if (info->hw_queue == info->control.vif->cab_queue) 528 return info->hw_queue; 529 530 WARN_ON_ONCE(1); 531 return IWL_MVM_DQA_P2P_DEVICE_QUEUE; 532 default: 533 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 534 return -1; 535 } 536 } 537 538 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 539 { 540 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 541 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 542 struct ieee80211_tx_info info; 543 struct iwl_device_cmd *dev_cmd; 544 struct iwl_tx_cmd *tx_cmd; 545 u8 sta_id; 546 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 547 int queue; 548 549 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used 550 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel 551 * queue. STATION (HS2.0) uses the auxiliary context of the FW, 552 * and hence needs to be sent on the aux queue 553 */ 554 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 555 skb_info->control.vif->type == NL80211_IFTYPE_STATION) 556 skb_info->hw_queue = mvm->aux_queue; 557 558 memcpy(&info, skb->cb, sizeof(info)); 559 560 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 561 return -1; 562 563 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 564 (!info.control.vif || 565 info.hw_queue != info.control.vif->cab_queue))) 566 return -1; 567 568 queue = info.hw_queue; 569 570 /* 571 * If the interface on which the frame is sent is the P2P_DEVICE 572 * or an AP/GO interface use the broadcast station associated 573 * with it; otherwise if the interface is a managed interface 574 * use the AP station associated with it for multicast traffic 575 * (this is not possible for unicast packets as a TLDS discovery 576 * response are sent without a station entry); otherwise use the 577 * AUX station. 578 * In DQA mode, if vif is of type STATION and frames are not multicast 579 * or offchannel, they should be sent from the BSS queue. 580 * For example, TDLS setup frames should be sent on this queue, 581 * as they go through the AP. 582 */ 583 sta_id = mvm->aux_sta.sta_id; 584 if (info.control.vif) { 585 struct iwl_mvm_vif *mvmvif = 586 iwl_mvm_vif_from_mac80211(info.control.vif); 587 588 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 589 info.control.vif->type == NL80211_IFTYPE_AP || 590 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 591 sta_id = mvmvif->bcast_sta.sta_id; 592 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, 593 hdr->frame_control); 594 if (queue < 0) 595 return -1; 596 597 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 598 is_multicast_ether_addr(hdr->addr1)) { 599 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id); 600 601 if (ap_sta_id != IWL_MVM_STATION_COUNT) 602 sta_id = ap_sta_id; 603 } else if (iwl_mvm_is_dqa_supported(mvm) && 604 info.control.vif->type == NL80211_IFTYPE_STATION && 605 queue != mvm->aux_queue) { 606 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 607 } 608 } 609 610 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 611 612 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 613 if (!dev_cmd) 614 return -1; 615 616 /* From now on, we cannot access info->control */ 617 iwl_mvm_skb_prepare_status(skb, dev_cmd); 618 619 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 620 621 /* Copy MAC header from skb into command buffer */ 622 memcpy(tx_cmd->hdr, hdr, hdrlen); 623 624 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 625 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 626 return -1; 627 } 628 629 /* 630 * Increase the pending frames counter, so that later when a reply comes 631 * in and the counter is decreased - we don't start getting negative 632 * values. 633 * Note that we don't need to make sure it isn't agg'd, since we're 634 * TXing non-sta 635 * For DQA mode - we shouldn't increase it though 636 */ 637 if (!iwl_mvm_is_dqa_supported(mvm)) 638 atomic_inc(&mvm->pending_frames[sta_id]); 639 640 return 0; 641 } 642 643 #ifdef CONFIG_INET 644 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 645 struct ieee80211_tx_info *info, 646 struct ieee80211_sta *sta, 647 struct sk_buff_head *mpdus_skb) 648 { 649 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 650 struct ieee80211_hdr *hdr = (void *)skb->data; 651 unsigned int mss = skb_shinfo(skb)->gso_size; 652 struct sk_buff *tmp, *next; 653 char cb[sizeof(skb->cb)]; 654 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 655 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 656 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 657 u16 snap_ip_tcp, pad, i = 0; 658 unsigned int dbg_max_amsdu_len; 659 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG; 660 u8 *qc, tid, txf; 661 662 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 663 tcp_hdrlen(skb); 664 665 qc = ieee80211_get_qos_ctl(hdr); 666 tid = *qc & IEEE80211_QOS_CTL_TID_MASK; 667 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 668 return -EINVAL; 669 670 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len); 671 672 if (!sta->max_amsdu_len || 673 !ieee80211_is_data_qos(hdr->frame_control) || 674 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) { 675 num_subframes = 1; 676 pad = 0; 677 goto segment; 678 } 679 680 /* 681 * Do not build AMSDU for IPv6 with extension headers. 682 * ask stack to segment and checkum the generated MPDUs for us. 683 */ 684 if (skb->protocol == htons(ETH_P_IPV6) && 685 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 686 IPPROTO_TCP) { 687 num_subframes = 1; 688 pad = 0; 689 netdev_features &= ~NETIF_F_CSUM_MASK; 690 goto segment; 691 } 692 693 /* 694 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 695 * during an BA session. 696 */ 697 if (info->flags & IEEE80211_TX_CTL_AMPDU && 698 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) { 699 num_subframes = 1; 700 pad = 0; 701 goto segment; 702 } 703 704 max_amsdu_len = sta->max_amsdu_len; 705 706 /* the Tx FIFO to which this A-MSDU will be routed */ 707 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 708 709 /* 710 * Don't send an AMSDU that will be longer than the TXF. 711 * Add a security margin of 256 for the TX command + headers. 712 * We also want to have the start of the next packet inside the 713 * fifo to be able to send bursts. 714 */ 715 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 716 mvm->shared_mem_cfg.txfifo_size[txf] - 256); 717 718 if (unlikely(dbg_max_amsdu_len)) 719 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 720 dbg_max_amsdu_len); 721 722 /* 723 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 724 * supported. This is a spec requirement (IEEE 802.11-2015 725 * section 8.7.3 NOTE 3). 726 */ 727 if (info->flags & IEEE80211_TX_CTL_AMPDU && 728 !sta->vht_cap.vht_supported) 729 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 730 731 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 732 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 733 pad = (4 - subf_len) & 0x3; 734 735 /* 736 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 737 * N * subf_len + (N - 1) * pad. 738 */ 739 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 740 if (num_subframes > 1) 741 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 742 743 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 744 tcp_hdrlen(skb) + skb->data_len; 745 746 /* 747 * Make sure we have enough TBs for the A-MSDU: 748 * 2 for each subframe 749 * 1 more for each fragment 750 * 1 more for the potential data in the header 751 */ 752 num_subframes = 753 min_t(unsigned int, num_subframes, 754 (mvm->trans->max_skb_frags - 1 - 755 skb_shinfo(skb)->nr_frags) / 2); 756 757 /* This skb fits in one single A-MSDU */ 758 if (num_subframes * mss >= tcp_payload_len) { 759 __skb_queue_tail(mpdus_skb, skb); 760 return 0; 761 } 762 763 /* 764 * Trick the segmentation function to make it 765 * create SKBs that can fit into one A-MSDU. 766 */ 767 segment: 768 skb_shinfo(skb)->gso_size = num_subframes * mss; 769 memcpy(cb, skb->cb, sizeof(cb)); 770 771 next = skb_gso_segment(skb, netdev_features); 772 skb_shinfo(skb)->gso_size = mss; 773 if (WARN_ON_ONCE(IS_ERR(next))) 774 return -EINVAL; 775 else if (next) 776 consume_skb(skb); 777 778 while (next) { 779 tmp = next; 780 next = tmp->next; 781 782 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 783 /* 784 * Compute the length of all the data added for the A-MSDU. 785 * This will be used to compute the length to write in the TX 786 * command. We have: SNAP + IP + TCP for n -1 subframes and 787 * ETH header for n subframes. 788 */ 789 tcp_payload_len = skb_tail_pointer(tmp) - 790 skb_transport_header(tmp) - 791 tcp_hdrlen(tmp) + tmp->data_len; 792 793 if (ipv4) 794 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 795 796 if (tcp_payload_len > mss) { 797 skb_shinfo(tmp)->gso_size = mss; 798 } else { 799 qc = ieee80211_get_qos_ctl((void *)tmp->data); 800 801 if (ipv4) 802 ip_send_check(ip_hdr(tmp)); 803 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 804 skb_shinfo(tmp)->gso_size = 0; 805 } 806 807 tmp->prev = NULL; 808 tmp->next = NULL; 809 810 __skb_queue_tail(mpdus_skb, tmp); 811 i++; 812 } 813 814 return 0; 815 } 816 #else /* CONFIG_INET */ 817 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 818 struct ieee80211_tx_info *info, 819 struct ieee80211_sta *sta, 820 struct sk_buff_head *mpdus_skb) 821 { 822 /* Impossible to get TSO with CONFIG_INET */ 823 WARN_ON(1); 824 825 return -1; 826 } 827 #endif 828 829 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, 830 struct iwl_mvm_sta *mvm_sta, u8 tid, 831 struct sk_buff *skb) 832 { 833 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 834 u8 mac_queue = info->hw_queue; 835 struct sk_buff_head *deferred_tx_frames; 836 837 lockdep_assert_held(&mvm_sta->lock); 838 839 mvm_sta->deferred_traffic_tid_map |= BIT(tid); 840 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); 841 842 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; 843 844 skb_queue_tail(deferred_tx_frames, skb); 845 846 /* 847 * The first deferred frame should've stopped the MAC queues, so we 848 * should never get a second deferred frame for the RA/TID. 849 */ 850 if (!WARN(skb_queue_len(deferred_tx_frames) != 1, 851 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid, 852 skb_queue_len(deferred_tx_frames))) { 853 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); 854 schedule_work(&mvm->add_stream_wk); 855 } 856 } 857 858 /* Check if there are any timed-out TIDs on a given shared TXQ */ 859 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 860 { 861 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 862 unsigned long now = jiffies; 863 int tid; 864 865 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 866 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 867 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 868 return true; 869 } 870 871 return false; 872 } 873 874 /* 875 * Sets the fields in the Tx cmd that are crypto related 876 */ 877 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 878 struct ieee80211_tx_info *info, 879 struct ieee80211_sta *sta) 880 { 881 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 882 struct iwl_mvm_sta *mvmsta; 883 struct iwl_device_cmd *dev_cmd; 884 struct iwl_tx_cmd *tx_cmd; 885 __le16 fc; 886 u16 seq_number = 0; 887 u8 tid = IWL_MAX_TID_COUNT; 888 u8 txq_id = info->hw_queue; 889 bool is_ampdu = false; 890 int hdrlen; 891 892 mvmsta = iwl_mvm_sta_from_mac80211(sta); 893 fc = hdr->frame_control; 894 hdrlen = ieee80211_hdrlen(fc); 895 896 if (WARN_ON_ONCE(!mvmsta)) 897 return -1; 898 899 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) 900 return -1; 901 902 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 903 sta, mvmsta->sta_id); 904 if (!dev_cmd) 905 goto drop; 906 907 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 908 909 /* 910 * we handle that entirely ourselves -- for uAPSD the firmware 911 * will always send a notification, and for PS-Poll responses 912 * we'll notify mac80211 when getting frame status 913 */ 914 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 915 916 spin_lock(&mvmsta->lock); 917 918 /* nullfunc frames should go to the MGMT queue regardless of QOS, 919 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 920 * assignment of MGMT TID 921 */ 922 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 923 u8 *qc = NULL; 924 qc = ieee80211_get_qos_ctl(hdr); 925 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 926 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 927 goto drop_unlock_sta; 928 929 seq_number = mvmsta->tid_data[tid].seq_number; 930 seq_number &= IEEE80211_SCTL_SEQ; 931 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 932 hdr->seq_ctrl |= cpu_to_le16(seq_number); 933 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 934 if (WARN_ON_ONCE(is_ampdu && 935 mvmsta->tid_data[tid].state != IWL_AGG_ON)) 936 goto drop_unlock_sta; 937 } 938 939 if (iwl_mvm_is_dqa_supported(mvm) || is_ampdu) 940 txq_id = mvmsta->tid_data[tid].txq_id; 941 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) { 942 /* default to TID 0 for non-QoS packets */ 943 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; 944 945 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; 946 } 947 948 /* Copy MAC header from skb into command buffer */ 949 memcpy(tx_cmd->hdr, hdr, hdrlen); 950 951 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 952 953 /* Check if TXQ needs to be allocated or re-activated */ 954 if (unlikely(txq_id == IEEE80211_INVAL_HW_QUEUE || 955 !mvmsta->tid_data[tid].is_tid_active) && 956 iwl_mvm_is_dqa_supported(mvm)) { 957 /* If TXQ needs to be allocated... */ 958 if (txq_id == IEEE80211_INVAL_HW_QUEUE) { 959 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); 960 961 /* 962 * The frame is now deferred, and the worker scheduled 963 * will re-allocate it, so we can free it for now. 964 */ 965 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 966 spin_unlock(&mvmsta->lock); 967 return 0; 968 } 969 970 /* If we are here - TXQ exists and needs to be re-activated */ 971 spin_lock(&mvm->queue_info_lock); 972 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 973 mvmsta->tid_data[tid].is_tid_active = true; 974 spin_unlock(&mvm->queue_info_lock); 975 976 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n", 977 txq_id); 978 } 979 980 if (iwl_mvm_is_dqa_supported(mvm)) { 981 /* Keep track of the time of the last frame for this RA/TID */ 982 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 983 984 /* 985 * If we have timed-out TIDs - schedule the worker that will 986 * reconfig the queues and update them 987 * 988 * Note that the mvm->queue_info_lock isn't being taken here in 989 * order to not serialize the TX flow. This isn't dangerous 990 * because scheduling mvm->add_stream_wk can't ruin the state, 991 * and if we DON'T schedule it due to some race condition then 992 * next TX we get here we will. 993 */ 994 if (unlikely(mvm->queue_info[txq_id].status == 995 IWL_MVM_QUEUE_SHARED && 996 iwl_mvm_txq_should_update(mvm, txq_id))) 997 schedule_work(&mvm->add_stream_wk); 998 } 999 1000 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 1001 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 1002 1003 /* From now on, we cannot access info->control */ 1004 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1005 1006 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1007 goto drop_unlock_sta; 1008 1009 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1010 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1011 1012 spin_unlock(&mvmsta->lock); 1013 1014 /* Increase pending frames count if this isn't AMPDU or DQA queue */ 1015 if (!iwl_mvm_is_dqa_supported(mvm) && !is_ampdu) 1016 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); 1017 1018 return 0; 1019 1020 drop_unlock_sta: 1021 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1022 spin_unlock(&mvmsta->lock); 1023 drop: 1024 return -1; 1025 } 1026 1027 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 1028 struct ieee80211_sta *sta) 1029 { 1030 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1031 struct ieee80211_tx_info info; 1032 struct sk_buff_head mpdus_skbs; 1033 unsigned int payload_len; 1034 int ret; 1035 1036 if (WARN_ON_ONCE(!mvmsta)) 1037 return -1; 1038 1039 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) 1040 return -1; 1041 1042 memcpy(&info, skb->cb, sizeof(info)); 1043 1044 if (!skb_is_gso(skb)) 1045 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1046 1047 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1048 tcp_hdrlen(skb) + skb->data_len; 1049 1050 if (payload_len <= skb_shinfo(skb)->gso_size) 1051 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1052 1053 __skb_queue_head_init(&mpdus_skbs); 1054 1055 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1056 if (ret) 1057 return ret; 1058 1059 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1060 return ret; 1061 1062 while (!skb_queue_empty(&mpdus_skbs)) { 1063 skb = __skb_dequeue(&mpdus_skbs); 1064 1065 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1066 if (ret) { 1067 __skb_queue_purge(&mpdus_skbs); 1068 return ret; 1069 } 1070 } 1071 1072 return 0; 1073 } 1074 1075 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1076 struct ieee80211_sta *sta, u8 tid) 1077 { 1078 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1079 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1080 struct ieee80211_vif *vif = mvmsta->vif; 1081 1082 lockdep_assert_held(&mvmsta->lock); 1083 1084 if ((tid_data->state == IWL_AGG_ON || 1085 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA || 1086 iwl_mvm_is_dqa_supported(mvm)) && 1087 iwl_mvm_tid_queued(tid_data) == 0) { 1088 /* 1089 * Now that this aggregation or DQA queue is empty tell 1090 * mac80211 so it knows we no longer have frames buffered for 1091 * the station on this TID (for the TIM bitmap calculation.) 1092 */ 1093 ieee80211_sta_set_buffered(sta, tid, false); 1094 } 1095 1096 if (tid_data->ssn != tid_data->next_reclaimed) 1097 return; 1098 1099 switch (tid_data->state) { 1100 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1101 IWL_DEBUG_TX_QUEUES(mvm, 1102 "Can continue addBA flow ssn = next_recl = %d\n", 1103 tid_data->next_reclaimed); 1104 tid_data->state = IWL_AGG_STARTING; 1105 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1106 break; 1107 1108 case IWL_EMPTYING_HW_QUEUE_DELBA: 1109 IWL_DEBUG_TX_QUEUES(mvm, 1110 "Can continue DELBA flow ssn = next_recl = %d\n", 1111 tid_data->next_reclaimed); 1112 if (!iwl_mvm_is_dqa_supported(mvm)) { 1113 u8 mac80211_ac = tid_to_mac80211_ac[tid]; 1114 1115 iwl_mvm_disable_txq(mvm, tid_data->txq_id, 1116 vif->hw_queue[mac80211_ac], tid, 1117 CMD_ASYNC); 1118 } 1119 tid_data->state = IWL_AGG_OFF; 1120 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1121 break; 1122 1123 default: 1124 break; 1125 } 1126 } 1127 1128 #ifdef CONFIG_IWLWIFI_DEBUG 1129 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1130 { 1131 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1132 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1133 1134 switch (status & TX_STATUS_MSK) { 1135 case TX_STATUS_SUCCESS: 1136 return "SUCCESS"; 1137 TX_STATUS_POSTPONE(DELAY); 1138 TX_STATUS_POSTPONE(FEW_BYTES); 1139 TX_STATUS_POSTPONE(BT_PRIO); 1140 TX_STATUS_POSTPONE(QUIET_PERIOD); 1141 TX_STATUS_POSTPONE(CALC_TTAK); 1142 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1143 TX_STATUS_FAIL(SHORT_LIMIT); 1144 TX_STATUS_FAIL(LONG_LIMIT); 1145 TX_STATUS_FAIL(UNDERRUN); 1146 TX_STATUS_FAIL(DRAIN_FLOW); 1147 TX_STATUS_FAIL(RFKILL_FLUSH); 1148 TX_STATUS_FAIL(LIFE_EXPIRE); 1149 TX_STATUS_FAIL(DEST_PS); 1150 TX_STATUS_FAIL(HOST_ABORTED); 1151 TX_STATUS_FAIL(BT_RETRY); 1152 TX_STATUS_FAIL(STA_INVALID); 1153 TX_STATUS_FAIL(FRAG_DROPPED); 1154 TX_STATUS_FAIL(TID_DISABLE); 1155 TX_STATUS_FAIL(FIFO_FLUSHED); 1156 TX_STATUS_FAIL(SMALL_CF_POLL); 1157 TX_STATUS_FAIL(FW_DROP); 1158 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1159 } 1160 1161 return "UNKNOWN"; 1162 1163 #undef TX_STATUS_FAIL 1164 #undef TX_STATUS_POSTPONE 1165 } 1166 #endif /* CONFIG_IWLWIFI_DEBUG */ 1167 1168 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1169 enum nl80211_band band, 1170 struct ieee80211_tx_rate *r) 1171 { 1172 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1173 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1174 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1175 case RATE_MCS_CHAN_WIDTH_20: 1176 break; 1177 case RATE_MCS_CHAN_WIDTH_40: 1178 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1179 break; 1180 case RATE_MCS_CHAN_WIDTH_80: 1181 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1182 break; 1183 case RATE_MCS_CHAN_WIDTH_160: 1184 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1185 break; 1186 } 1187 if (rate_n_flags & RATE_MCS_SGI_MSK) 1188 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1189 if (rate_n_flags & RATE_MCS_HT_MSK) { 1190 r->flags |= IEEE80211_TX_RC_MCS; 1191 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1192 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1193 ieee80211_rate_set_vht( 1194 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1195 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1196 RATE_VHT_MCS_NSS_POS) + 1); 1197 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1198 } else { 1199 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1200 band); 1201 } 1202 } 1203 1204 /** 1205 * translate ucode response to mac80211 tx status control values 1206 */ 1207 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1208 struct ieee80211_tx_info *info) 1209 { 1210 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1211 1212 info->status.antenna = 1213 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1214 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1215 } 1216 1217 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1218 u32 status) 1219 { 1220 struct iwl_fw_dbg_trigger_tlv *trig; 1221 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1222 int i; 1223 1224 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) 1225 return; 1226 1227 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); 1228 status_trig = (void *)trig->data; 1229 1230 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) 1231 return; 1232 1233 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1234 /* don't collect on status 0 */ 1235 if (!status_trig->statuses[i].status) 1236 break; 1237 1238 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1239 continue; 1240 1241 iwl_mvm_fw_dbg_collect_trig(mvm, trig, 1242 "Tx status %d was received", 1243 status & TX_STATUS_MSK); 1244 break; 1245 } 1246 } 1247 1248 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1249 struct iwl_rx_packet *pkt) 1250 { 1251 struct ieee80211_sta *sta; 1252 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1253 int txq_id = SEQ_TO_QUEUE(sequence); 1254 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1255 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1256 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1257 u32 status = le16_to_cpu(tx_resp->status.status); 1258 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); 1259 struct iwl_mvm_sta *mvmsta; 1260 struct sk_buff_head skbs; 1261 u8 skb_freed = 0; 1262 u16 next_reclaimed, seq_ctl; 1263 bool is_ndp = false; 1264 1265 __skb_queue_head_init(&skbs); 1266 1267 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1268 1269 /* we can free until ssn % q.n_bd not inclusive */ 1270 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1271 1272 while (!skb_queue_empty(&skbs)) { 1273 struct sk_buff *skb = __skb_dequeue(&skbs); 1274 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1275 1276 skb_freed++; 1277 1278 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1279 1280 memset(&info->status, 0, sizeof(info->status)); 1281 1282 /* inform mac80211 about what happened with the frame */ 1283 switch (status & TX_STATUS_MSK) { 1284 case TX_STATUS_SUCCESS: 1285 case TX_STATUS_DIRECT_DONE: 1286 info->flags |= IEEE80211_TX_STAT_ACK; 1287 break; 1288 case TX_STATUS_FAIL_DEST_PS: 1289 /* In DQA, the FW should have stopped the queue and not 1290 * return this status 1291 */ 1292 WARN_ON(iwl_mvm_is_dqa_supported(mvm)); 1293 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1294 break; 1295 default: 1296 break; 1297 } 1298 1299 iwl_mvm_tx_status_check_trigger(mvm, status); 1300 1301 info->status.rates[0].count = tx_resp->failure_frame + 1; 1302 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1303 info); 1304 info->status.status_driver_data[1] = 1305 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1306 1307 /* Single frame failure in an AMPDU queue => send BAR */ 1308 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1309 !(info->flags & IEEE80211_TX_STAT_ACK) && 1310 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) 1311 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1312 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1313 1314 /* W/A FW bug: seq_ctl is wrong when the status isn't success */ 1315 if (status != TX_STATUS_SUCCESS) { 1316 struct ieee80211_hdr *hdr = (void *)skb->data; 1317 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1318 } 1319 1320 if (unlikely(!seq_ctl)) { 1321 struct ieee80211_hdr *hdr = (void *)skb->data; 1322 1323 /* 1324 * If it is an NDP, we can't update next_reclaim since 1325 * its sequence control is 0. Note that for that same 1326 * reason, NDPs are never sent to A-MPDU'able queues 1327 * so that we can never have more than one freed frame 1328 * for a single Tx resonse (see WARN_ON below). 1329 */ 1330 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1331 is_ndp = true; 1332 } 1333 1334 /* 1335 * TODO: this is not accurate if we are freeing more than one 1336 * packet. 1337 */ 1338 info->status.tx_time = 1339 le16_to_cpu(tx_resp->wireless_media_time); 1340 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1341 info->status.status_driver_data[0] = 1342 (void *)(uintptr_t)tx_resp->reduced_tpc; 1343 1344 ieee80211_tx_status(mvm->hw, skb); 1345 } 1346 1347 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) { 1348 /* If this is an aggregation queue, we use the ssn since: 1349 * ssn = wifi seq_num % 256. 1350 * The seq_ctl is the sequence control of the packet to which 1351 * this Tx response relates. But if there is a hole in the 1352 * bitmap of the BA we received, this Tx response may allow to 1353 * reclaim the hole and all the subsequent packets that were 1354 * already acked. In that case, seq_ctl != ssn, and the next 1355 * packet to be reclaimed will be ssn and not seq_ctl. In that 1356 * case, several packets will be reclaimed even if 1357 * frame_count = 1. 1358 * 1359 * The ssn is the index (% 256) of the latest packet that has 1360 * treated (acked / dropped) + 1. 1361 */ 1362 next_reclaimed = ssn; 1363 } else { 1364 /* The next packet to be reclaimed is the one after this one */ 1365 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); 1366 } 1367 1368 IWL_DEBUG_TX_REPLY(mvm, 1369 "TXQ %d status %s (0x%08x)\n", 1370 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1371 1372 IWL_DEBUG_TX_REPLY(mvm, 1373 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1374 le32_to_cpu(tx_resp->initial_rate), 1375 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1376 ssn, next_reclaimed, seq_ctl); 1377 1378 rcu_read_lock(); 1379 1380 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1381 /* 1382 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1383 * the firmware while we still have packets for it in the Tx queues. 1384 */ 1385 if (WARN_ON_ONCE(!sta)) 1386 goto out; 1387 1388 if (!IS_ERR(sta)) { 1389 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1390 1391 if (tid != IWL_TID_NON_QOS) { 1392 struct iwl_mvm_tid_data *tid_data = 1393 &mvmsta->tid_data[tid]; 1394 bool send_eosp_ndp = false; 1395 1396 spin_lock_bh(&mvmsta->lock); 1397 1398 if (!is_ndp) { 1399 tid_data->next_reclaimed = next_reclaimed; 1400 IWL_DEBUG_TX_REPLY(mvm, 1401 "Next reclaimed packet:%d\n", 1402 next_reclaimed); 1403 } else { 1404 IWL_DEBUG_TX_REPLY(mvm, 1405 "NDP - don't update next_reclaimed\n"); 1406 } 1407 1408 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1409 1410 if (mvmsta->sleep_tx_count) { 1411 mvmsta->sleep_tx_count--; 1412 if (mvmsta->sleep_tx_count && 1413 !iwl_mvm_tid_queued(tid_data)) { 1414 /* 1415 * The number of frames in the queue 1416 * dropped to 0 even if we sent less 1417 * frames than we thought we had on the 1418 * Tx queue. 1419 * This means we had holes in the BA 1420 * window that we just filled, ask 1421 * mac80211 to send EOSP since the 1422 * firmware won't know how to do that. 1423 * Send NDP and the firmware will send 1424 * EOSP notification that will trigger 1425 * a call to ieee80211_sta_eosp(). 1426 */ 1427 send_eosp_ndp = true; 1428 } 1429 } 1430 1431 spin_unlock_bh(&mvmsta->lock); 1432 if (send_eosp_ndp) { 1433 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1434 IEEE80211_FRAME_RELEASE_UAPSD, 1435 1, tid, false, false); 1436 mvmsta->sleep_tx_count = 0; 1437 ieee80211_send_eosp_nullfunc(sta, tid); 1438 } 1439 } 1440 1441 if (mvmsta->next_status_eosp) { 1442 mvmsta->next_status_eosp = false; 1443 ieee80211_sta_eosp(sta); 1444 } 1445 } else { 1446 mvmsta = NULL; 1447 } 1448 1449 /* 1450 * If the txq is not an AMPDU queue, there is no chance we freed 1451 * several skbs. Check that out... 1452 */ 1453 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) 1454 goto out; 1455 1456 /* We can't free more than one frame at once on a shared queue */ 1457 WARN_ON(skb_freed > 1); 1458 1459 /* If we have still frames for this STA nothing to do here */ 1460 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) 1461 goto out; 1462 1463 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { 1464 1465 /* 1466 * If there are no pending frames for this STA and 1467 * the tx to this station is not disabled, notify 1468 * mac80211 that this station can now wake up in its 1469 * STA table. 1470 * If mvmsta is not NULL, sta is valid. 1471 */ 1472 1473 spin_lock_bh(&mvmsta->lock); 1474 1475 if (!mvmsta->disable_tx) 1476 ieee80211_sta_block_awake(mvm->hw, sta, false); 1477 1478 spin_unlock_bh(&mvmsta->lock); 1479 } 1480 1481 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { 1482 /* 1483 * We are draining and this was the last packet - pre_rcu_remove 1484 * has been called already. We might be after the 1485 * synchronize_net already. 1486 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. 1487 */ 1488 set_bit(sta_id, mvm->sta_drained); 1489 schedule_work(&mvm->sta_drained_wk); 1490 } 1491 1492 out: 1493 rcu_read_unlock(); 1494 } 1495 1496 #ifdef CONFIG_IWLWIFI_DEBUG 1497 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1498 static const char *iwl_get_agg_tx_status(u16 status) 1499 { 1500 switch (status & AGG_TX_STATE_STATUS_MSK) { 1501 AGG_TX_STATE_(TRANSMITTED); 1502 AGG_TX_STATE_(UNDERRUN); 1503 AGG_TX_STATE_(BT_PRIO); 1504 AGG_TX_STATE_(FEW_BYTES); 1505 AGG_TX_STATE_(ABORT); 1506 AGG_TX_STATE_(LAST_SENT_TTL); 1507 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1508 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1509 AGG_TX_STATE_(SCD_QUERY); 1510 AGG_TX_STATE_(TEST_BAD_CRC32); 1511 AGG_TX_STATE_(RESPONSE); 1512 AGG_TX_STATE_(DUMP_TX); 1513 AGG_TX_STATE_(DELAY_TX); 1514 } 1515 1516 return "UNKNOWN"; 1517 } 1518 1519 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1520 struct iwl_rx_packet *pkt) 1521 { 1522 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1523 struct agg_tx_status *frame_status = &tx_resp->status; 1524 int i; 1525 1526 for (i = 0; i < tx_resp->frame_count; i++) { 1527 u16 fstatus = le16_to_cpu(frame_status[i].status); 1528 1529 IWL_DEBUG_TX_REPLY(mvm, 1530 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1531 iwl_get_agg_tx_status(fstatus), 1532 fstatus & AGG_TX_STATE_STATUS_MSK, 1533 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1534 AGG_TX_STATE_TRY_CNT_POS, 1535 le16_to_cpu(frame_status[i].sequence)); 1536 } 1537 } 1538 #else 1539 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1540 struct iwl_rx_packet *pkt) 1541 {} 1542 #endif /* CONFIG_IWLWIFI_DEBUG */ 1543 1544 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1545 struct iwl_rx_packet *pkt) 1546 { 1547 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1548 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1549 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1550 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1551 struct iwl_mvm_sta *mvmsta; 1552 int queue = SEQ_TO_QUEUE(sequence); 1553 1554 if (WARN_ON_ONCE(queue < mvm->first_agg_queue && 1555 (!iwl_mvm_is_dqa_supported(mvm) || 1556 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))) 1557 return; 1558 1559 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) 1560 return; 1561 1562 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1563 1564 rcu_read_lock(); 1565 1566 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1567 1568 if (!WARN_ON_ONCE(!mvmsta)) { 1569 mvmsta->tid_data[tid].rate_n_flags = 1570 le32_to_cpu(tx_resp->initial_rate); 1571 mvmsta->tid_data[tid].tx_time = 1572 le16_to_cpu(tx_resp->wireless_media_time); 1573 } 1574 1575 rcu_read_unlock(); 1576 } 1577 1578 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1579 { 1580 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1581 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1582 1583 if (tx_resp->frame_count == 1) 1584 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1585 else 1586 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1587 } 1588 1589 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1590 int txq, int index, 1591 struct ieee80211_tx_info *ba_info, u32 rate) 1592 { 1593 struct sk_buff_head reclaimed_skbs; 1594 struct iwl_mvm_tid_data *tid_data; 1595 struct ieee80211_sta *sta; 1596 struct iwl_mvm_sta *mvmsta; 1597 struct sk_buff *skb; 1598 int freed; 1599 1600 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1601 tid >= IWL_MAX_TID_COUNT, 1602 "sta_id %d tid %d", sta_id, tid)) 1603 return; 1604 1605 rcu_read_lock(); 1606 1607 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1608 1609 /* Reclaiming frames for a station that has been deleted ? */ 1610 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1611 rcu_read_unlock(); 1612 return; 1613 } 1614 1615 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1616 tid_data = &mvmsta->tid_data[tid]; 1617 1618 if (tid_data->txq_id != txq) { 1619 IWL_ERR(mvm, 1620 "invalid BA notification: Q %d, tid %d\n", 1621 tid_data->txq_id, tid); 1622 rcu_read_unlock(); 1623 return; 1624 } 1625 1626 spin_lock_bh(&mvmsta->lock); 1627 1628 __skb_queue_head_init(&reclaimed_skbs); 1629 1630 /* 1631 * Release all TFDs before the SSN, i.e. all TFDs in front of 1632 * block-ack window (we assume that they've been successfully 1633 * transmitted ... if not, it's too late anyway). 1634 */ 1635 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1636 1637 tid_data->next_reclaimed = index; 1638 1639 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1640 1641 freed = 0; 1642 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1643 1644 skb_queue_walk(&reclaimed_skbs, skb) { 1645 struct ieee80211_hdr *hdr = (void *)skb->data; 1646 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1647 1648 if (ieee80211_is_data_qos(hdr->frame_control)) 1649 freed++; 1650 else 1651 WARN_ON_ONCE(1); 1652 1653 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1654 1655 memset(&info->status, 0, sizeof(info->status)); 1656 /* Packet was transmitted successfully, failures come as single 1657 * frames because before failing a frame the firmware transmits 1658 * it without aggregation at least once. 1659 */ 1660 info->flags |= IEEE80211_TX_STAT_ACK; 1661 1662 /* this is the first skb we deliver in this batch */ 1663 /* put the rate scaling data there */ 1664 if (freed == 1) { 1665 info->flags |= IEEE80211_TX_STAT_AMPDU; 1666 memcpy(&info->status, &ba_info->status, 1667 sizeof(ba_info->status)); 1668 iwl_mvm_hwrate_to_tx_status(rate, info); 1669 } 1670 } 1671 1672 spin_unlock_bh(&mvmsta->lock); 1673 1674 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1675 * possible (i.e. first MPDU in the aggregation wasn't acked) 1676 * Still it's important to update RS about sent vs. acked. 1677 */ 1678 if (skb_queue_empty(&reclaimed_skbs)) { 1679 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1680 1681 if (mvmsta->vif) 1682 chanctx_conf = 1683 rcu_dereference(mvmsta->vif->chanctx_conf); 1684 1685 if (WARN_ON_ONCE(!chanctx_conf)) 1686 goto out; 1687 1688 ba_info->band = chanctx_conf->def.chan->band; 1689 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1690 1691 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 1692 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1693 } 1694 1695 out: 1696 rcu_read_unlock(); 1697 1698 while (!skb_queue_empty(&reclaimed_skbs)) { 1699 skb = __skb_dequeue(&reclaimed_skbs); 1700 ieee80211_tx_status(mvm->hw, skb); 1701 } 1702 } 1703 1704 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1705 { 1706 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1707 int sta_id, tid, txq, index; 1708 struct ieee80211_tx_info ba_info = {}; 1709 struct iwl_mvm_ba_notif *ba_notif; 1710 struct iwl_mvm_tid_data *tid_data; 1711 struct iwl_mvm_sta *mvmsta; 1712 1713 if (iwl_mvm_has_new_tx_api(mvm)) { 1714 struct iwl_mvm_compressed_ba_notif *ba_res = 1715 (void *)pkt->data; 1716 1717 sta_id = ba_res->sta_id; 1718 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1719 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1720 ba_info.status.tx_time = 1721 (u16)le32_to_cpu(ba_res->wireless_time); 1722 ba_info.status.status_driver_data[0] = 1723 (void *)(uintptr_t)ba_res->reduced_txp; 1724 1725 /* 1726 * TODO: 1727 * When supporting multi TID aggregations - we need to move 1728 * next_reclaimed to be per TXQ and not per TID or handle it 1729 * in a different way. 1730 * This will go together with SN and AddBA offload and cannot 1731 * be handled properly for now. 1732 */ 1733 WARN_ON(le16_to_cpu(ba_res->tfd_cnt) != 1); 1734 iwl_mvm_tx_reclaim(mvm, sta_id, ba_res->ra_tid[0].tid, 1735 (int)ba_res->tfd[0].q_num, 1736 le16_to_cpu(ba_res->tfd[0].tfd_index), 1737 &ba_info, le32_to_cpu(ba_res->tx_rate)); 1738 1739 IWL_DEBUG_TX_REPLY(mvm, 1740 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1741 sta_id, le32_to_cpu(ba_res->flags), 1742 le16_to_cpu(ba_res->txed), 1743 le16_to_cpu(ba_res->done)); 1744 return; 1745 } 1746 1747 ba_notif = (void *)pkt->data; 1748 sta_id = ba_notif->sta_id; 1749 tid = ba_notif->tid; 1750 /* "flow" corresponds to Tx queue */ 1751 txq = le16_to_cpu(ba_notif->scd_flow); 1752 /* "ssn" is start of block-ack Tx window, corresponds to index 1753 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1754 index = le16_to_cpu(ba_notif->scd_ssn); 1755 1756 rcu_read_lock(); 1757 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1758 if (WARN_ON_ONCE(!mvmsta)) { 1759 rcu_read_unlock(); 1760 return; 1761 } 1762 1763 tid_data = &mvmsta->tid_data[tid]; 1764 1765 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1766 ba_info.status.ampdu_len = ba_notif->txed; 1767 ba_info.status.tx_time = tid_data->tx_time; 1768 ba_info.status.status_driver_data[0] = 1769 (void *)(uintptr_t)ba_notif->reduced_txp; 1770 1771 rcu_read_unlock(); 1772 1773 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1774 tid_data->rate_n_flags); 1775 1776 IWL_DEBUG_TX_REPLY(mvm, 1777 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1778 (u8 *)&ba_notif->sta_addr_lo32, ba_notif->sta_id); 1779 1780 IWL_DEBUG_TX_REPLY(mvm, 1781 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1782 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1783 le64_to_cpu(ba_notif->bitmap), txq, index, 1784 ba_notif->txed, ba_notif->txed_2_done); 1785 1786 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1787 ba_notif->reduced_txp); 1788 } 1789 1790 /* 1791 * Note that there are transports that buffer frames before they reach 1792 * the firmware. This means that after flush_tx_path is called, the 1793 * queue might not be empty. The race-free way to handle this is to: 1794 * 1) set the station as draining 1795 * 2) flush the Tx path 1796 * 3) wait for the transport queues to be empty 1797 */ 1798 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 1799 { 1800 int ret; 1801 struct iwl_tx_path_flush_cmd flush_cmd = { 1802 .queues_ctl = cpu_to_le32(tfd_msk), 1803 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 1804 }; 1805 1806 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1807 sizeof(flush_cmd), &flush_cmd); 1808 if (ret) 1809 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1810 return ret; 1811 } 1812