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