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 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 * All rights reserved. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 43 * * Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * * Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in 47 * the documentation and/or other materials provided with the 48 * distribution. 49 * * Neither the name Intel Corporation nor the names of its 50 * contributors may be used to endorse or promote products derived 51 * from this software without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 54 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 55 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 56 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 57 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 58 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 59 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 63 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 64 * 65 *****************************************************************************/ 66 #include <linux/ieee80211.h> 67 #include <linux/etherdevice.h> 68 #include <linux/tcp.h> 69 #include <net/ip.h> 70 #include <net/ipv6.h> 71 72 #include "iwl-trans.h" 73 #include "iwl-eeprom-parse.h" 74 #include "mvm.h" 75 #include "sta.h" 76 #include "fw-dbg.h" 77 78 static void 79 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 80 u16 tid, u16 ssn) 81 { 82 struct iwl_fw_dbg_trigger_tlv *trig; 83 struct iwl_fw_dbg_trigger_ba *ba_trig; 84 85 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA)) 86 return; 87 88 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA); 89 ba_trig = (void *)trig->data; 90 91 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) 92 return; 93 94 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 95 return; 96 97 iwl_mvm_fw_dbg_collect_trig(mvm, trig, 98 "BAR sent to %pM, tid %d, ssn %d", 99 addr, tid, ssn); 100 } 101 102 #define OPT_HDR(type, skb, off) \ 103 (type *)(skb_network_header(skb) + (off)) 104 105 static void iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 106 struct ieee80211_hdr *hdr, 107 struct ieee80211_tx_info *info, 108 struct iwl_tx_cmd *tx_cmd) 109 { 110 #if IS_ENABLED(CONFIG_INET) 111 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 112 u16 offload_assist = le16_to_cpu(tx_cmd->offload_assist); 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 return; 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 return; 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 return; 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 return; 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 tx_cmd->offload_assist = cpu_to_le16(offload_assist); 195 #endif 196 } 197 198 /* 199 * Sets most of the Tx cmd's fields 200 */ 201 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 202 struct iwl_tx_cmd *tx_cmd, 203 struct ieee80211_tx_info *info, u8 sta_id) 204 { 205 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 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 */ 288 tx_cmd->len = cpu_to_le16((u16)skb->len + 289 (uintptr_t)skb_info->driver_data[0]); 290 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 291 tx_cmd->sta_id = sta_id; 292 293 /* padding is inserted later in transport */ 294 if (ieee80211_hdrlen(fc) % 4 && 295 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU)))) 296 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD)); 297 298 iwl_mvm_tx_csum(mvm, skb, hdr, info, tx_cmd); 299 } 300 301 /* 302 * Sets the fields in the Tx cmd that are rate related 303 */ 304 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 305 struct ieee80211_tx_info *info, 306 struct ieee80211_sta *sta, __le16 fc) 307 { 308 u32 rate_flags; 309 int rate_idx; 310 u8 rate_plcp; 311 312 /* Set retry limit on RTS packets */ 313 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 314 315 /* Set retry limit on DATA packets and Probe Responses*/ 316 if (ieee80211_is_probe_resp(fc)) { 317 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 318 tx_cmd->rts_retry_limit = 319 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 320 } else if (ieee80211_is_back_req(fc)) { 321 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 322 } else { 323 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 324 } 325 326 /* 327 * for data packets, rate info comes from the table inside the fw. This 328 * table is controlled by LINK_QUALITY commands 329 */ 330 331 if (ieee80211_is_data(fc) && sta) { 332 tx_cmd->initial_rate_index = 0; 333 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 334 return; 335 } else if (ieee80211_is_back_req(fc)) { 336 tx_cmd->tx_flags |= 337 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 338 } 339 340 /* HT rate doesn't make sense for a non data frame */ 341 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, 342 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n", 343 info->control.rates[0].flags, 344 info->control.rates[0].idx, 345 le16_to_cpu(fc)); 346 347 rate_idx = info->control.rates[0].idx; 348 /* if the rate isn't a well known legacy rate, take the lowest one */ 349 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY) 350 rate_idx = rate_lowest_index( 351 &mvm->nvm_data->bands[info->band], sta); 352 353 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 354 if (info->band == NL80211_BAND_5GHZ) 355 rate_idx += IWL_FIRST_OFDM_RATE; 356 357 /* For 2.4 GHZ band, check that there is no need to remap */ 358 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 359 360 /* Get PLCP rate for tx_cmd->rate_n_flags */ 361 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 362 363 mvm->mgmt_last_antenna_idx = 364 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 365 mvm->mgmt_last_antenna_idx); 366 367 if (info->band == NL80211_BAND_2GHZ && 368 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 369 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 370 else 371 rate_flags = 372 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 373 374 /* Set CCK flag as needed */ 375 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 376 rate_flags |= RATE_MCS_CCK_MSK; 377 378 /* Set the rate in the TX cmd */ 379 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags); 380 } 381 382 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 383 u8 *crypto_hdr) 384 { 385 struct ieee80211_key_conf *keyconf = info->control.hw_key; 386 u64 pn; 387 388 pn = atomic64_inc_return(&keyconf->tx_pn); 389 crypto_hdr[0] = pn; 390 crypto_hdr[2] = 0; 391 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 392 crypto_hdr[1] = pn >> 8; 393 crypto_hdr[4] = pn >> 16; 394 crypto_hdr[5] = pn >> 24; 395 crypto_hdr[6] = pn >> 32; 396 crypto_hdr[7] = pn >> 40; 397 } 398 399 /* 400 * Sets the fields in the Tx cmd that are crypto related 401 */ 402 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 403 struct ieee80211_tx_info *info, 404 struct iwl_tx_cmd *tx_cmd, 405 struct sk_buff *skb_frag, 406 int hdrlen) 407 { 408 struct ieee80211_key_conf *keyconf = info->control.hw_key; 409 u8 *crypto_hdr = skb_frag->data + hdrlen; 410 u64 pn; 411 412 switch (keyconf->cipher) { 413 case WLAN_CIPHER_SUITE_CCMP: 414 case WLAN_CIPHER_SUITE_CCMP_256: 415 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 416 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 417 break; 418 419 case WLAN_CIPHER_SUITE_TKIP: 420 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 421 pn = atomic64_inc_return(&keyconf->tx_pn); 422 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 423 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 424 break; 425 426 case WLAN_CIPHER_SUITE_WEP104: 427 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 428 /* fall through */ 429 case WLAN_CIPHER_SUITE_WEP40: 430 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 431 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 432 TX_CMD_SEC_WEP_KEY_IDX_MSK); 433 434 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 435 break; 436 case WLAN_CIPHER_SUITE_GCMP: 437 case WLAN_CIPHER_SUITE_GCMP_256: 438 /* TODO: Taking the key from the table might introduce a race 439 * when PTK rekeying is done, having an old packets with a PN 440 * based on the old key but the message encrypted with a new 441 * one. 442 * Need to handle this. 443 */ 444 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TC_CMD_SEC_KEY_FROM_TABLE; 445 tx_cmd->key[0] = keyconf->hw_key_idx; 446 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 447 break; 448 default: 449 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 450 } 451 } 452 453 /* 454 * Allocates and sets the Tx cmd the driver data pointers in the skb 455 */ 456 static struct iwl_device_cmd * 457 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 458 struct ieee80211_tx_info *info, int hdrlen, 459 struct ieee80211_sta *sta, u8 sta_id) 460 { 461 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 462 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 463 struct iwl_device_cmd *dev_cmd; 464 struct iwl_tx_cmd *tx_cmd; 465 466 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 467 468 if (unlikely(!dev_cmd)) 469 return NULL; 470 471 memset(dev_cmd, 0, sizeof(*dev_cmd)); 472 dev_cmd->hdr.cmd = TX_CMD; 473 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 474 475 if (info->control.hw_key) 476 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 477 478 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 479 480 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 481 482 memset(&skb_info->status, 0, sizeof(skb_info->status)); 483 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 484 485 skb_info->driver_data[1] = dev_cmd; 486 487 return dev_cmd; 488 } 489 490 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 491 struct ieee80211_tx_info *info, __le16 fc) 492 { 493 if (iwl_mvm_is_dqa_supported(mvm)) { 494 if (info->control.vif->type == NL80211_IFTYPE_AP && 495 ieee80211_is_probe_resp(fc)) 496 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; 497 else if (ieee80211_is_mgmt(fc) && 498 info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE) 499 return IWL_MVM_DQA_P2P_DEVICE_QUEUE; 500 } 501 502 return info->hw_queue; 503 } 504 505 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 506 { 507 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 508 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 509 struct ieee80211_tx_info info; 510 struct iwl_device_cmd *dev_cmd; 511 struct iwl_tx_cmd *tx_cmd; 512 u8 sta_id; 513 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 514 int queue; 515 516 memcpy(&info, skb->cb, sizeof(info)); 517 518 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 519 return -1; 520 521 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 522 (!info.control.vif || 523 info.hw_queue != info.control.vif->cab_queue))) 524 return -1; 525 526 /* This holds the amsdu headers length */ 527 skb_info->driver_data[0] = (void *)(uintptr_t)0; 528 529 /* 530 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used 531 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel 532 * queue. STATION (HS2.0) uses the auxiliary context of the FW, 533 * and hence needs to be sent on the aux queue 534 */ 535 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 536 info.control.vif->type == NL80211_IFTYPE_STATION) 537 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue; 538 539 queue = info.hw_queue; 540 541 /* 542 * If the interface on which the frame is sent is the P2P_DEVICE 543 * or an AP/GO interface use the broadcast station associated 544 * with it; otherwise if the interface is a managed interface 545 * use the AP station associated with it for multicast traffic 546 * (this is not possible for unicast packets as a TLDS discovery 547 * response are sent without a station entry); otherwise use the 548 * AUX station. 549 * In DQA mode, if vif is of type STATION and frames are not multicast, 550 * they should be sent from the BSS queue. For example, TDLS setup 551 * frames should be sent on this queue, as they go through the AP. 552 */ 553 sta_id = mvm->aux_sta.sta_id; 554 if (info.control.vif) { 555 struct iwl_mvm_vif *mvmvif = 556 iwl_mvm_vif_from_mac80211(info.control.vif); 557 558 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 559 info.control.vif->type == NL80211_IFTYPE_AP) { 560 sta_id = mvmvif->bcast_sta.sta_id; 561 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, 562 hdr->frame_control); 563 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 564 is_multicast_ether_addr(hdr->addr1)) { 565 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id); 566 567 if (ap_sta_id != IWL_MVM_STATION_COUNT) 568 sta_id = ap_sta_id; 569 } else if (iwl_mvm_is_dqa_supported(mvm) && 570 info.control.vif->type == NL80211_IFTYPE_STATION) { 571 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 572 } 573 } 574 575 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 576 577 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 578 if (!dev_cmd) 579 return -1; 580 581 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 582 583 /* Copy MAC header from skb into command buffer */ 584 memcpy(tx_cmd->hdr, hdr, hdrlen); 585 586 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 587 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 588 return -1; 589 } 590 591 /* 592 * Increase the pending frames counter, so that later when a reply comes 593 * in and the counter is decreased - we don't start getting negative 594 * values. 595 * Note that we don't need to make sure it isn't agg'd, since we're 596 * TXing non-sta 597 */ 598 atomic_inc(&mvm->pending_frames[sta_id]); 599 600 return 0; 601 } 602 603 #ifdef CONFIG_INET 604 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 605 struct ieee80211_tx_info *info, 606 struct ieee80211_sta *sta, 607 struct sk_buff_head *mpdus_skb) 608 { 609 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 610 struct ieee80211_hdr *hdr = (void *)skb->data; 611 unsigned int mss = skb_shinfo(skb)->gso_size; 612 struct sk_buff *tmp, *next; 613 char cb[sizeof(skb->cb)]; 614 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 615 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 616 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 617 u16 amsdu_add, snap_ip_tcp, pad, i = 0; 618 unsigned int dbg_max_amsdu_len; 619 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG; 620 u8 *qc, tid, txf; 621 622 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 623 tcp_hdrlen(skb); 624 625 qc = ieee80211_get_qos_ctl(hdr); 626 tid = *qc & IEEE80211_QOS_CTL_TID_MASK; 627 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 628 return -EINVAL; 629 630 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len); 631 632 if (!sta->max_amsdu_len || 633 !ieee80211_is_data_qos(hdr->frame_control) || 634 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) { 635 num_subframes = 1; 636 pad = 0; 637 goto segment; 638 } 639 640 /* 641 * Do not build AMSDU for IPv6 with extension headers. 642 * ask stack to segment and checkum the generated MPDUs for us. 643 */ 644 if (skb->protocol == htons(ETH_P_IPV6) && 645 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 646 IPPROTO_TCP) { 647 num_subframes = 1; 648 pad = 0; 649 netdev_features &= ~NETIF_F_CSUM_MASK; 650 goto segment; 651 } 652 653 /* 654 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 655 * during an BA session. 656 */ 657 if (info->flags & IEEE80211_TX_CTL_AMPDU && 658 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) { 659 num_subframes = 1; 660 pad = 0; 661 goto segment; 662 } 663 664 max_amsdu_len = sta->max_amsdu_len; 665 666 /* the Tx FIFO to which this A-MSDU will be routed */ 667 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 668 669 /* 670 * Don't send an AMSDU that will be longer than the TXF. 671 * Add a security margin of 256 for the TX command + headers. 672 * We also want to have the start of the next packet inside the 673 * fifo to be able to send bursts. 674 */ 675 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 676 mvm->shared_mem_cfg.txfifo_size[txf] - 256); 677 678 if (unlikely(dbg_max_amsdu_len)) 679 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 680 dbg_max_amsdu_len); 681 682 /* 683 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 684 * supported. This is a spec requirement (IEEE 802.11-2015 685 * section 8.7.3 NOTE 3). 686 */ 687 if (info->flags & IEEE80211_TX_CTL_AMPDU && 688 !sta->vht_cap.vht_supported) 689 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 690 691 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 692 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 693 pad = (4 - subf_len) & 0x3; 694 695 /* 696 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 697 * N * subf_len + (N - 1) * pad. 698 */ 699 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 700 if (num_subframes > 1) 701 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 702 703 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 704 tcp_hdrlen(skb) + skb->data_len; 705 706 /* 707 * Make sure we have enough TBs for the A-MSDU: 708 * 2 for each subframe 709 * 1 more for each fragment 710 * 1 more for the potential data in the header 711 */ 712 num_subframes = 713 min_t(unsigned int, num_subframes, 714 (mvm->trans->max_skb_frags - 1 - 715 skb_shinfo(skb)->nr_frags) / 2); 716 717 /* This skb fits in one single A-MSDU */ 718 if (num_subframes * mss >= tcp_payload_len) { 719 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 720 721 /* 722 * Compute the length of all the data added for the A-MSDU. 723 * This will be used to compute the length to write in the TX 724 * command. We have: SNAP + IP + TCP for n -1 subframes and 725 * ETH header for n subframes. Note that the original skb 726 * already had one set of SNAP / IP / TCP headers. 727 */ 728 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss); 729 amsdu_add = num_subframes * sizeof(struct ethhdr) + 730 (num_subframes - 1) * (snap_ip_tcp + pad); 731 /* This holds the amsdu headers length */ 732 skb_info->driver_data[0] = (void *)(uintptr_t)amsdu_add; 733 734 __skb_queue_tail(mpdus_skb, skb); 735 return 0; 736 } 737 738 /* 739 * Trick the segmentation function to make it 740 * create SKBs that can fit into one A-MSDU. 741 */ 742 segment: 743 skb_shinfo(skb)->gso_size = num_subframes * mss; 744 memcpy(cb, skb->cb, sizeof(cb)); 745 746 next = skb_gso_segment(skb, netdev_features); 747 skb_shinfo(skb)->gso_size = mss; 748 if (WARN_ON_ONCE(IS_ERR(next))) 749 return -EINVAL; 750 else if (next) 751 consume_skb(skb); 752 753 while (next) { 754 tmp = next; 755 next = tmp->next; 756 757 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 758 /* 759 * Compute the length of all the data added for the A-MSDU. 760 * This will be used to compute the length to write in the TX 761 * command. We have: SNAP + IP + TCP for n -1 subframes and 762 * ETH header for n subframes. 763 */ 764 tcp_payload_len = skb_tail_pointer(tmp) - 765 skb_transport_header(tmp) - 766 tcp_hdrlen(tmp) + tmp->data_len; 767 768 if (ipv4) 769 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 770 771 if (tcp_payload_len > mss) { 772 struct ieee80211_tx_info *skb_info = 773 IEEE80211_SKB_CB(tmp); 774 775 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss); 776 amsdu_add = num_subframes * sizeof(struct ethhdr) + 777 (num_subframes - 1) * (snap_ip_tcp + pad); 778 skb_info->driver_data[0] = 779 (void *)(uintptr_t)amsdu_add; 780 skb_shinfo(tmp)->gso_size = mss; 781 } else { 782 qc = ieee80211_get_qos_ctl((void *)tmp->data); 783 784 if (ipv4) 785 ip_send_check(ip_hdr(tmp)); 786 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 787 skb_shinfo(tmp)->gso_size = 0; 788 } 789 790 tmp->prev = NULL; 791 tmp->next = NULL; 792 793 __skb_queue_tail(mpdus_skb, tmp); 794 i++; 795 } 796 797 return 0; 798 } 799 #else /* CONFIG_INET */ 800 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 801 struct ieee80211_tx_info *info, 802 struct ieee80211_sta *sta, 803 struct sk_buff_head *mpdus_skb) 804 { 805 /* Impossible to get TSO with CONFIG_INET */ 806 WARN_ON(1); 807 808 return -1; 809 } 810 #endif 811 812 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, 813 struct iwl_mvm_sta *mvm_sta, u8 tid, 814 struct sk_buff *skb) 815 { 816 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 817 u8 mac_queue = info->hw_queue; 818 struct sk_buff_head *deferred_tx_frames; 819 820 lockdep_assert_held(&mvm_sta->lock); 821 822 mvm_sta->deferred_traffic_tid_map |= BIT(tid); 823 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); 824 825 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; 826 827 skb_queue_tail(deferred_tx_frames, skb); 828 829 /* 830 * The first deferred frame should've stopped the MAC queues, so we 831 * should never get a second deferred frame for the RA/TID. 832 */ 833 if (!WARN(skb_queue_len(deferred_tx_frames) != 1, 834 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid, 835 skb_queue_len(deferred_tx_frames))) { 836 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); 837 schedule_work(&mvm->add_stream_wk); 838 } 839 } 840 841 /* 842 * Sets the fields in the Tx cmd that are crypto related 843 */ 844 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 845 struct ieee80211_tx_info *info, 846 struct ieee80211_sta *sta) 847 { 848 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 849 struct iwl_mvm_sta *mvmsta; 850 struct iwl_device_cmd *dev_cmd; 851 struct iwl_tx_cmd *tx_cmd; 852 __le16 fc; 853 u16 seq_number = 0; 854 u8 tid = IWL_MAX_TID_COUNT; 855 u8 txq_id = info->hw_queue; 856 bool is_ampdu = false; 857 int hdrlen; 858 859 mvmsta = iwl_mvm_sta_from_mac80211(sta); 860 fc = hdr->frame_control; 861 hdrlen = ieee80211_hdrlen(fc); 862 863 if (WARN_ON_ONCE(!mvmsta)) 864 return -1; 865 866 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) 867 return -1; 868 869 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 870 sta, mvmsta->sta_id); 871 if (!dev_cmd) 872 goto drop; 873 874 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 875 /* From now on, we cannot access info->control */ 876 877 /* 878 * we handle that entirely ourselves -- for uAPSD the firmware 879 * will always send a notification, and for PS-Poll responses 880 * we'll notify mac80211 when getting frame status 881 */ 882 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 883 884 spin_lock(&mvmsta->lock); 885 886 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 887 u8 *qc = NULL; 888 qc = ieee80211_get_qos_ctl(hdr); 889 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 890 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 891 goto drop_unlock_sta; 892 893 seq_number = mvmsta->tid_data[tid].seq_number; 894 seq_number &= IEEE80211_SCTL_SEQ; 895 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 896 hdr->seq_ctrl |= cpu_to_le16(seq_number); 897 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 898 } else if (iwl_mvm_is_dqa_supported(mvm) && 899 (ieee80211_is_qos_nullfunc(fc) || 900 ieee80211_is_nullfunc(fc))) { 901 /* 902 * nullfunc frames should go to the MGMT queue regardless of QOS 903 */ 904 tid = IWL_MAX_TID_COUNT; 905 } 906 907 if (iwl_mvm_is_dqa_supported(mvm)) 908 txq_id = mvmsta->tid_data[tid].txq_id; 909 910 /* Copy MAC header from skb into command buffer */ 911 memcpy(tx_cmd->hdr, hdr, hdrlen); 912 913 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 914 915 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) { 916 /* default to TID 0 for non-QoS packets */ 917 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; 918 919 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; 920 } 921 922 if (is_ampdu) { 923 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON)) 924 goto drop_unlock_sta; 925 txq_id = mvmsta->tid_data[tid].txq_id; 926 } 927 928 /* Check if TXQ needs to be allocated or re-activated */ 929 if (unlikely(txq_id == IEEE80211_INVAL_HW_QUEUE || 930 !mvmsta->tid_data[tid].is_tid_active) && 931 iwl_mvm_is_dqa_supported(mvm)) { 932 /* If TXQ needs to be allocated... */ 933 if (txq_id == IEEE80211_INVAL_HW_QUEUE) { 934 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); 935 936 /* 937 * The frame is now deferred, and the worker scheduled 938 * will re-allocate it, so we can free it for now. 939 */ 940 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 941 spin_unlock(&mvmsta->lock); 942 return 0; 943 944 } 945 946 /* If we are here - TXQ exists and needs to be re-activated */ 947 spin_lock(&mvm->queue_info_lock); 948 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 949 mvmsta->tid_data[tid].is_tid_active = true; 950 spin_unlock(&mvm->queue_info_lock); 951 952 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n", 953 txq_id); 954 } 955 956 /* Keep track of the time of the last frame for this RA/TID */ 957 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 958 959 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 960 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 961 962 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 963 goto drop_unlock_sta; 964 965 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 966 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 967 968 spin_unlock(&mvmsta->lock); 969 970 /* Increase pending frames count if this isn't AMPDU */ 971 if (!is_ampdu) 972 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); 973 974 return 0; 975 976 drop_unlock_sta: 977 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 978 spin_unlock(&mvmsta->lock); 979 drop: 980 return -1; 981 } 982 983 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 984 struct ieee80211_sta *sta) 985 { 986 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 987 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 988 struct ieee80211_tx_info info; 989 struct sk_buff_head mpdus_skbs; 990 unsigned int payload_len; 991 int ret; 992 993 if (WARN_ON_ONCE(!mvmsta)) 994 return -1; 995 996 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) 997 return -1; 998 999 memcpy(&info, skb->cb, sizeof(info)); 1000 1001 /* This holds the amsdu headers length */ 1002 skb_info->driver_data[0] = (void *)(uintptr_t)0; 1003 1004 if (!skb_is_gso(skb)) 1005 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1006 1007 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1008 tcp_hdrlen(skb) + skb->data_len; 1009 1010 if (payload_len <= skb_shinfo(skb)->gso_size) 1011 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1012 1013 __skb_queue_head_init(&mpdus_skbs); 1014 1015 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1016 if (ret) 1017 return ret; 1018 1019 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1020 return ret; 1021 1022 while (!skb_queue_empty(&mpdus_skbs)) { 1023 skb = __skb_dequeue(&mpdus_skbs); 1024 1025 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1026 if (ret) { 1027 __skb_queue_purge(&mpdus_skbs); 1028 return ret; 1029 } 1030 } 1031 1032 return 0; 1033 } 1034 1035 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1036 struct ieee80211_sta *sta, u8 tid) 1037 { 1038 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1039 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1040 struct ieee80211_vif *vif = mvmsta->vif; 1041 1042 lockdep_assert_held(&mvmsta->lock); 1043 1044 if ((tid_data->state == IWL_AGG_ON || 1045 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1046 iwl_mvm_tid_queued(tid_data) == 0) { 1047 /* 1048 * Now that this aggregation queue is empty tell mac80211 so it 1049 * knows we no longer have frames buffered for the station on 1050 * this TID (for the TIM bitmap calculation.) 1051 */ 1052 ieee80211_sta_set_buffered(sta, tid, false); 1053 } 1054 1055 if (tid_data->ssn != tid_data->next_reclaimed) 1056 return; 1057 1058 switch (tid_data->state) { 1059 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1060 IWL_DEBUG_TX_QUEUES(mvm, 1061 "Can continue addBA flow ssn = next_recl = %d\n", 1062 tid_data->next_reclaimed); 1063 tid_data->state = IWL_AGG_STARTING; 1064 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1065 break; 1066 1067 case IWL_EMPTYING_HW_QUEUE_DELBA: 1068 IWL_DEBUG_TX_QUEUES(mvm, 1069 "Can continue DELBA flow ssn = next_recl = %d\n", 1070 tid_data->next_reclaimed); 1071 iwl_mvm_disable_txq(mvm, tid_data->txq_id, 1072 vif->hw_queue[tid_to_mac80211_ac[tid]], tid, 1073 CMD_ASYNC); 1074 tid_data->state = IWL_AGG_OFF; 1075 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1076 break; 1077 1078 default: 1079 break; 1080 } 1081 } 1082 1083 #ifdef CONFIG_IWLWIFI_DEBUG 1084 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1085 { 1086 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1087 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1088 1089 switch (status & TX_STATUS_MSK) { 1090 case TX_STATUS_SUCCESS: 1091 return "SUCCESS"; 1092 TX_STATUS_POSTPONE(DELAY); 1093 TX_STATUS_POSTPONE(FEW_BYTES); 1094 TX_STATUS_POSTPONE(BT_PRIO); 1095 TX_STATUS_POSTPONE(QUIET_PERIOD); 1096 TX_STATUS_POSTPONE(CALC_TTAK); 1097 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1098 TX_STATUS_FAIL(SHORT_LIMIT); 1099 TX_STATUS_FAIL(LONG_LIMIT); 1100 TX_STATUS_FAIL(UNDERRUN); 1101 TX_STATUS_FAIL(DRAIN_FLOW); 1102 TX_STATUS_FAIL(RFKILL_FLUSH); 1103 TX_STATUS_FAIL(LIFE_EXPIRE); 1104 TX_STATUS_FAIL(DEST_PS); 1105 TX_STATUS_FAIL(HOST_ABORTED); 1106 TX_STATUS_FAIL(BT_RETRY); 1107 TX_STATUS_FAIL(STA_INVALID); 1108 TX_STATUS_FAIL(FRAG_DROPPED); 1109 TX_STATUS_FAIL(TID_DISABLE); 1110 TX_STATUS_FAIL(FIFO_FLUSHED); 1111 TX_STATUS_FAIL(SMALL_CF_POLL); 1112 TX_STATUS_FAIL(FW_DROP); 1113 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1114 } 1115 1116 return "UNKNOWN"; 1117 1118 #undef TX_STATUS_FAIL 1119 #undef TX_STATUS_POSTPONE 1120 } 1121 #endif /* CONFIG_IWLWIFI_DEBUG */ 1122 1123 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1124 enum nl80211_band band, 1125 struct ieee80211_tx_rate *r) 1126 { 1127 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1128 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1129 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1130 case RATE_MCS_CHAN_WIDTH_20: 1131 break; 1132 case RATE_MCS_CHAN_WIDTH_40: 1133 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1134 break; 1135 case RATE_MCS_CHAN_WIDTH_80: 1136 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1137 break; 1138 case RATE_MCS_CHAN_WIDTH_160: 1139 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1140 break; 1141 } 1142 if (rate_n_flags & RATE_MCS_SGI_MSK) 1143 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1144 if (rate_n_flags & RATE_MCS_HT_MSK) { 1145 r->flags |= IEEE80211_TX_RC_MCS; 1146 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1147 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1148 ieee80211_rate_set_vht( 1149 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1150 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1151 RATE_VHT_MCS_NSS_POS) + 1); 1152 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1153 } else { 1154 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1155 band); 1156 } 1157 } 1158 1159 /** 1160 * translate ucode response to mac80211 tx status control values 1161 */ 1162 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1163 struct ieee80211_tx_info *info) 1164 { 1165 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1166 1167 info->status.antenna = 1168 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1169 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1170 } 1171 1172 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1173 u32 status) 1174 { 1175 struct iwl_fw_dbg_trigger_tlv *trig; 1176 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1177 int i; 1178 1179 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) 1180 return; 1181 1182 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); 1183 status_trig = (void *)trig->data; 1184 1185 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) 1186 return; 1187 1188 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1189 /* don't collect on status 0 */ 1190 if (!status_trig->statuses[i].status) 1191 break; 1192 1193 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1194 continue; 1195 1196 iwl_mvm_fw_dbg_collect_trig(mvm, trig, 1197 "Tx status %d was received", 1198 status & TX_STATUS_MSK); 1199 break; 1200 } 1201 } 1202 1203 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1204 struct iwl_rx_packet *pkt) 1205 { 1206 struct ieee80211_sta *sta; 1207 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1208 int txq_id = SEQ_TO_QUEUE(sequence); 1209 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1210 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1211 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1212 u32 status = le16_to_cpu(tx_resp->status.status); 1213 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); 1214 struct iwl_mvm_sta *mvmsta; 1215 struct sk_buff_head skbs; 1216 u8 skb_freed = 0; 1217 u16 next_reclaimed, seq_ctl; 1218 bool is_ndp = false; 1219 bool txq_agg = false; /* Is this TXQ aggregated */ 1220 1221 __skb_queue_head_init(&skbs); 1222 1223 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1224 1225 /* we can free until ssn % q.n_bd not inclusive */ 1226 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1227 1228 while (!skb_queue_empty(&skbs)) { 1229 struct sk_buff *skb = __skb_dequeue(&skbs); 1230 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1231 1232 skb_freed++; 1233 1234 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1235 1236 memset(&info->status, 0, sizeof(info->status)); 1237 1238 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1239 1240 /* inform mac80211 about what happened with the frame */ 1241 switch (status & TX_STATUS_MSK) { 1242 case TX_STATUS_SUCCESS: 1243 case TX_STATUS_DIRECT_DONE: 1244 info->flags |= IEEE80211_TX_STAT_ACK; 1245 break; 1246 case TX_STATUS_FAIL_DEST_PS: 1247 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1248 break; 1249 default: 1250 break; 1251 } 1252 1253 iwl_mvm_tx_status_check_trigger(mvm, status); 1254 1255 info->status.rates[0].count = tx_resp->failure_frame + 1; 1256 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1257 info); 1258 info->status.status_driver_data[1] = 1259 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1260 1261 /* Single frame failure in an AMPDU queue => send BAR */ 1262 if (txq_id >= mvm->first_agg_queue && 1263 !(info->flags & IEEE80211_TX_STAT_ACK) && 1264 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) 1265 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1266 1267 /* W/A FW bug: seq_ctl is wrong when the status isn't success */ 1268 if (status != TX_STATUS_SUCCESS) { 1269 struct ieee80211_hdr *hdr = (void *)skb->data; 1270 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1271 } 1272 1273 if (unlikely(!seq_ctl)) { 1274 struct ieee80211_hdr *hdr = (void *)skb->data; 1275 1276 /* 1277 * If it is an NDP, we can't update next_reclaim since 1278 * its sequence control is 0. Note that for that same 1279 * reason, NDPs are never sent to A-MPDU'able queues 1280 * so that we can never have more than one freed frame 1281 * for a single Tx resonse (see WARN_ON below). 1282 */ 1283 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1284 is_ndp = true; 1285 } 1286 1287 /* 1288 * TODO: this is not accurate if we are freeing more than one 1289 * packet. 1290 */ 1291 info->status.tx_time = 1292 le16_to_cpu(tx_resp->wireless_media_time); 1293 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1294 info->status.status_driver_data[0] = 1295 (void *)(uintptr_t)tx_resp->reduced_tpc; 1296 1297 ieee80211_tx_status(mvm->hw, skb); 1298 } 1299 1300 if (txq_id >= mvm->first_agg_queue) { 1301 /* If this is an aggregation queue, we use the ssn since: 1302 * ssn = wifi seq_num % 256. 1303 * The seq_ctl is the sequence control of the packet to which 1304 * this Tx response relates. But if there is a hole in the 1305 * bitmap of the BA we received, this Tx response may allow to 1306 * reclaim the hole and all the subsequent packets that were 1307 * already acked. In that case, seq_ctl != ssn, and the next 1308 * packet to be reclaimed will be ssn and not seq_ctl. In that 1309 * case, several packets will be reclaimed even if 1310 * frame_count = 1. 1311 * 1312 * The ssn is the index (% 256) of the latest packet that has 1313 * treated (acked / dropped) + 1. 1314 */ 1315 next_reclaimed = ssn; 1316 } else { 1317 /* The next packet to be reclaimed is the one after this one */ 1318 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); 1319 } 1320 1321 IWL_DEBUG_TX_REPLY(mvm, 1322 "TXQ %d status %s (0x%08x)\n", 1323 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1324 1325 IWL_DEBUG_TX_REPLY(mvm, 1326 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1327 le32_to_cpu(tx_resp->initial_rate), 1328 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1329 ssn, next_reclaimed, seq_ctl); 1330 1331 rcu_read_lock(); 1332 1333 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1334 /* 1335 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1336 * the firmware while we still have packets for it in the Tx queues. 1337 */ 1338 if (WARN_ON_ONCE(!sta)) 1339 goto out; 1340 1341 if (!IS_ERR(sta)) { 1342 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1343 1344 if (tid != IWL_TID_NON_QOS) { 1345 struct iwl_mvm_tid_data *tid_data = 1346 &mvmsta->tid_data[tid]; 1347 bool send_eosp_ndp = false; 1348 1349 spin_lock_bh(&mvmsta->lock); 1350 if (iwl_mvm_is_dqa_supported(mvm)) { 1351 enum iwl_mvm_agg_state state; 1352 1353 state = mvmsta->tid_data[tid].state; 1354 txq_agg = (state == IWL_AGG_ON || 1355 state == IWL_EMPTYING_HW_QUEUE_DELBA); 1356 } else { 1357 txq_agg = txq_id >= mvm->first_agg_queue; 1358 } 1359 1360 if (!is_ndp) { 1361 tid_data->next_reclaimed = next_reclaimed; 1362 IWL_DEBUG_TX_REPLY(mvm, 1363 "Next reclaimed packet:%d\n", 1364 next_reclaimed); 1365 } else { 1366 IWL_DEBUG_TX_REPLY(mvm, 1367 "NDP - don't update next_reclaimed\n"); 1368 } 1369 1370 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1371 1372 if (mvmsta->sleep_tx_count) { 1373 mvmsta->sleep_tx_count--; 1374 if (mvmsta->sleep_tx_count && 1375 !iwl_mvm_tid_queued(tid_data)) { 1376 /* 1377 * The number of frames in the queue 1378 * dropped to 0 even if we sent less 1379 * frames than we thought we had on the 1380 * Tx queue. 1381 * This means we had holes in the BA 1382 * window that we just filled, ask 1383 * mac80211 to send EOSP since the 1384 * firmware won't know how to do that. 1385 * Send NDP and the firmware will send 1386 * EOSP notification that will trigger 1387 * a call to ieee80211_sta_eosp(). 1388 */ 1389 send_eosp_ndp = true; 1390 } 1391 } 1392 1393 spin_unlock_bh(&mvmsta->lock); 1394 if (send_eosp_ndp) { 1395 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1396 IEEE80211_FRAME_RELEASE_UAPSD, 1397 1, tid, false, false); 1398 mvmsta->sleep_tx_count = 0; 1399 ieee80211_send_eosp_nullfunc(sta, tid); 1400 } 1401 } 1402 1403 if (mvmsta->next_status_eosp) { 1404 mvmsta->next_status_eosp = false; 1405 ieee80211_sta_eosp(sta); 1406 } 1407 } else { 1408 mvmsta = NULL; 1409 } 1410 1411 /* 1412 * If the txq is not an AMPDU queue, there is no chance we freed 1413 * several skbs. Check that out... 1414 */ 1415 if (txq_agg) 1416 goto out; 1417 1418 /* We can't free more than one frame at once on a shared queue */ 1419 WARN_ON(!iwl_mvm_is_dqa_supported(mvm) && (skb_freed > 1)); 1420 1421 /* If we have still frames for this STA nothing to do here */ 1422 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) 1423 goto out; 1424 1425 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { 1426 1427 /* 1428 * If there are no pending frames for this STA and 1429 * the tx to this station is not disabled, notify 1430 * mac80211 that this station can now wake up in its 1431 * STA table. 1432 * If mvmsta is not NULL, sta is valid. 1433 */ 1434 1435 spin_lock_bh(&mvmsta->lock); 1436 1437 if (!mvmsta->disable_tx) 1438 ieee80211_sta_block_awake(mvm->hw, sta, false); 1439 1440 spin_unlock_bh(&mvmsta->lock); 1441 } 1442 1443 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { 1444 /* 1445 * We are draining and this was the last packet - pre_rcu_remove 1446 * has been called already. We might be after the 1447 * synchronize_net already. 1448 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. 1449 */ 1450 set_bit(sta_id, mvm->sta_drained); 1451 schedule_work(&mvm->sta_drained_wk); 1452 } 1453 1454 out: 1455 rcu_read_unlock(); 1456 } 1457 1458 #ifdef CONFIG_IWLWIFI_DEBUG 1459 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1460 static const char *iwl_get_agg_tx_status(u16 status) 1461 { 1462 switch (status & AGG_TX_STATE_STATUS_MSK) { 1463 AGG_TX_STATE_(TRANSMITTED); 1464 AGG_TX_STATE_(UNDERRUN); 1465 AGG_TX_STATE_(BT_PRIO); 1466 AGG_TX_STATE_(FEW_BYTES); 1467 AGG_TX_STATE_(ABORT); 1468 AGG_TX_STATE_(LAST_SENT_TTL); 1469 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1470 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1471 AGG_TX_STATE_(SCD_QUERY); 1472 AGG_TX_STATE_(TEST_BAD_CRC32); 1473 AGG_TX_STATE_(RESPONSE); 1474 AGG_TX_STATE_(DUMP_TX); 1475 AGG_TX_STATE_(DELAY_TX); 1476 } 1477 1478 return "UNKNOWN"; 1479 } 1480 1481 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1482 struct iwl_rx_packet *pkt) 1483 { 1484 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1485 struct agg_tx_status *frame_status = &tx_resp->status; 1486 int i; 1487 1488 for (i = 0; i < tx_resp->frame_count; i++) { 1489 u16 fstatus = le16_to_cpu(frame_status[i].status); 1490 1491 IWL_DEBUG_TX_REPLY(mvm, 1492 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1493 iwl_get_agg_tx_status(fstatus), 1494 fstatus & AGG_TX_STATE_STATUS_MSK, 1495 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1496 AGG_TX_STATE_TRY_CNT_POS, 1497 le16_to_cpu(frame_status[i].sequence)); 1498 } 1499 } 1500 #else 1501 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1502 struct iwl_rx_packet *pkt) 1503 {} 1504 #endif /* CONFIG_IWLWIFI_DEBUG */ 1505 1506 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1507 struct iwl_rx_packet *pkt) 1508 { 1509 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1510 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1511 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1512 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1513 struct iwl_mvm_sta *mvmsta; 1514 int queue = SEQ_TO_QUEUE(sequence); 1515 1516 if (WARN_ON_ONCE(queue < mvm->first_agg_queue && 1517 (!iwl_mvm_is_dqa_supported(mvm) || 1518 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))) 1519 return; 1520 1521 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) 1522 return; 1523 1524 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1525 1526 rcu_read_lock(); 1527 1528 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1529 1530 if (!WARN_ON_ONCE(!mvmsta)) { 1531 mvmsta->tid_data[tid].rate_n_flags = 1532 le32_to_cpu(tx_resp->initial_rate); 1533 mvmsta->tid_data[tid].tx_time = 1534 le16_to_cpu(tx_resp->wireless_media_time); 1535 } 1536 1537 rcu_read_unlock(); 1538 } 1539 1540 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1541 { 1542 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1543 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1544 1545 if (tx_resp->frame_count == 1) 1546 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1547 else 1548 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1549 } 1550 1551 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info, 1552 struct iwl_mvm_ba_notif *ba_notif, 1553 struct iwl_mvm_tid_data *tid_data) 1554 { 1555 info->flags |= IEEE80211_TX_STAT_AMPDU; 1556 info->status.ampdu_ack_len = ba_notif->txed_2_done; 1557 info->status.ampdu_len = ba_notif->txed; 1558 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags, 1559 info); 1560 /* TODO: not accounted if the whole A-MPDU failed */ 1561 info->status.tx_time = tid_data->tx_time; 1562 info->status.status_driver_data[0] = 1563 (void *)(uintptr_t)ba_notif->reduced_txp; 1564 info->status.status_driver_data[1] = 1565 (void *)(uintptr_t)tid_data->rate_n_flags; 1566 } 1567 1568 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1569 { 1570 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1571 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data; 1572 struct sk_buff_head reclaimed_skbs; 1573 struct iwl_mvm_tid_data *tid_data; 1574 struct ieee80211_sta *sta; 1575 struct iwl_mvm_sta *mvmsta; 1576 struct sk_buff *skb; 1577 int sta_id, tid, freed; 1578 /* "flow" corresponds to Tx queue */ 1579 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow); 1580 /* "ssn" is start of block-ack Tx window, corresponds to index 1581 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1582 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn); 1583 1584 sta_id = ba_notif->sta_id; 1585 tid = ba_notif->tid; 1586 1587 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1588 tid >= IWL_MAX_TID_COUNT, 1589 "sta_id %d tid %d", sta_id, tid)) 1590 return; 1591 1592 rcu_read_lock(); 1593 1594 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1595 1596 /* Reclaiming frames for a station that has been deleted ? */ 1597 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1598 rcu_read_unlock(); 1599 return; 1600 } 1601 1602 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1603 tid_data = &mvmsta->tid_data[tid]; 1604 1605 if (tid_data->txq_id != scd_flow) { 1606 IWL_ERR(mvm, 1607 "invalid BA notification: Q %d, tid %d, flow %d\n", 1608 tid_data->txq_id, tid, scd_flow); 1609 rcu_read_unlock(); 1610 return; 1611 } 1612 1613 spin_lock_bh(&mvmsta->lock); 1614 1615 __skb_queue_head_init(&reclaimed_skbs); 1616 1617 /* 1618 * Release all TFDs before the SSN, i.e. all TFDs in front of 1619 * block-ack window (we assume that they've been successfully 1620 * transmitted ... if not, it's too late anyway). 1621 */ 1622 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn, 1623 &reclaimed_skbs); 1624 1625 IWL_DEBUG_TX_REPLY(mvm, 1626 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1627 (u8 *)&ba_notif->sta_addr_lo32, 1628 ba_notif->sta_id); 1629 IWL_DEBUG_TX_REPLY(mvm, 1630 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1631 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1632 (unsigned long long)le64_to_cpu(ba_notif->bitmap), 1633 scd_flow, ba_resp_scd_ssn, ba_notif->txed, 1634 ba_notif->txed_2_done); 1635 1636 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1637 ba_notif->reduced_txp); 1638 tid_data->next_reclaimed = ba_resp_scd_ssn; 1639 1640 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1641 1642 freed = 0; 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 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data); 1666 } 1667 1668 spin_unlock_bh(&mvmsta->lock); 1669 1670 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1671 * possible (i.e. first MPDU in the aggregation wasn't acked) 1672 * Still it's important to update RS about sent vs. acked. 1673 */ 1674 if (skb_queue_empty(&reclaimed_skbs)) { 1675 struct ieee80211_tx_info ba_info = {}; 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_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data); 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 /* 1702 * Note that there are transports that buffer frames before they reach 1703 * the firmware. This means that after flush_tx_path is called, the 1704 * queue might not be empty. The race-free way to handle this is to: 1705 * 1) set the station as draining 1706 * 2) flush the Tx path 1707 * 3) wait for the transport queues to be empty 1708 */ 1709 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 1710 { 1711 int ret; 1712 struct iwl_tx_path_flush_cmd flush_cmd = { 1713 .queues_ctl = cpu_to_le32(tfd_msk), 1714 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 1715 }; 1716 1717 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1718 sizeof(flush_cmd), &flush_cmd); 1719 if (ret) 1720 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1721 return ret; 1722 } 1723