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 u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 106 struct ieee80211_hdr *hdr, 107 struct ieee80211_tx_info *info) 108 { 109 u16 offload_assist = 0; 110 #if IS_ENABLED(CONFIG_INET) 111 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 112 u8 protocol = 0; 113 114 /* 115 * Do not compute checksum if already computed or if transport will 116 * compute it 117 */ 118 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD) 119 goto out; 120 121 /* We do not expect to be requested to csum stuff we do not support */ 122 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 123 (skb->protocol != htons(ETH_P_IP) && 124 skb->protocol != htons(ETH_P_IPV6)), 125 "No support for requested checksum\n")) { 126 skb_checksum_help(skb); 127 goto out; 128 } 129 130 if (skb->protocol == htons(ETH_P_IP)) { 131 protocol = ip_hdr(skb)->protocol; 132 } else { 133 #if IS_ENABLED(CONFIG_IPV6) 134 struct ipv6hdr *ipv6h = 135 (struct ipv6hdr *)skb_network_header(skb); 136 unsigned int off = sizeof(*ipv6h); 137 138 protocol = ipv6h->nexthdr; 139 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 140 struct ipv6_opt_hdr *hp; 141 142 /* only supported extension headers */ 143 if (protocol != NEXTHDR_ROUTING && 144 protocol != NEXTHDR_HOP && 145 protocol != NEXTHDR_DEST) { 146 skb_checksum_help(skb); 147 goto out; 148 } 149 150 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 151 protocol = hp->nexthdr; 152 off += ipv6_optlen(hp); 153 } 154 /* if we get here - protocol now should be TCP/UDP */ 155 #endif 156 } 157 158 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 159 WARN_ON_ONCE(1); 160 skb_checksum_help(skb); 161 goto out; 162 } 163 164 /* enable L4 csum */ 165 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 166 167 /* 168 * Set offset to IP header (snap). 169 * We don't support tunneling so no need to take care of inner header. 170 * Size is in words. 171 */ 172 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 173 174 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 175 if (skb->protocol == htons(ETH_P_IP) && 176 (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) { 177 ip_hdr(skb)->check = 0; 178 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 179 } 180 181 /* reset UDP/TCP header csum */ 182 if (protocol == IPPROTO_TCP) 183 tcp_hdr(skb)->check = 0; 184 else 185 udp_hdr(skb)->check = 0; 186 187 /* mac header len should include IV, size is in words */ 188 if (info->control.hw_key) 189 mh_len += info->control.hw_key->iv_len; 190 mh_len /= 2; 191 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 192 193 out: 194 #endif 195 return offload_assist; 196 } 197 198 /* 199 * Sets most of the Tx cmd's fields 200 */ 201 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 202 struct iwl_tx_cmd *tx_cmd, 203 struct ieee80211_tx_info *info, u8 sta_id) 204 { 205 struct ieee80211_hdr *hdr = (void *)skb->data; 206 __le16 fc = hdr->frame_control; 207 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 208 u32 len = skb->len + FCS_LEN; 209 u8 ac; 210 211 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 212 tx_flags |= TX_CMD_FLG_ACK; 213 else 214 tx_flags &= ~TX_CMD_FLG_ACK; 215 216 if (ieee80211_is_probe_resp(fc)) 217 tx_flags |= TX_CMD_FLG_TSF; 218 219 if (ieee80211_has_morefrags(fc)) 220 tx_flags |= TX_CMD_FLG_MORE_FRAG; 221 222 if (ieee80211_is_data_qos(fc)) { 223 u8 *qc = ieee80211_get_qos_ctl(hdr); 224 tx_cmd->tid_tspec = qc[0] & 0xf; 225 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 226 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 227 tx_cmd->offload_assist |= 228 cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU)); 229 } else if (ieee80211_is_back_req(fc)) { 230 struct ieee80211_bar *bar = (void *)skb->data; 231 u16 control = le16_to_cpu(bar->control); 232 u16 ssn = le16_to_cpu(bar->start_seq_num); 233 234 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 235 tx_cmd->tid_tspec = (control & 236 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 237 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 238 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 239 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 240 ssn); 241 } else { 242 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 243 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 244 tx_flags |= TX_CMD_FLG_SEQ_CTL; 245 else 246 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 247 } 248 249 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */ 250 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 251 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 252 else 253 ac = tid_to_mac80211_ac[0]; 254 255 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 256 TX_CMD_FLG_BT_PRIO_POS; 257 258 if (ieee80211_is_mgmt(fc)) { 259 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 260 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 261 else if (ieee80211_is_action(fc)) 262 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 263 else 264 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 265 266 /* The spec allows Action frames in A-MPDU, we don't support 267 * it 268 */ 269 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 270 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 271 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 272 } else { 273 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 274 } 275 276 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 277 !is_multicast_ether_addr(ieee80211_get_DA(hdr))) 278 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 279 280 if (fw_has_capa(&mvm->fw->ucode_capa, 281 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 282 ieee80211_action_contains_tpc(skb)) 283 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 284 285 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 286 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 287 tx_cmd->len = cpu_to_le16((u16)skb->len); 288 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 289 tx_cmd->sta_id = sta_id; 290 291 /* padding is inserted later in transport */ 292 if (ieee80211_hdrlen(fc) % 4 && 293 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU)))) 294 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD)); 295 296 tx_cmd->offload_assist |= 297 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info)); 298 } 299 300 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 301 struct ieee80211_tx_info *info, 302 struct ieee80211_sta *sta) 303 { 304 int rate_idx; 305 u8 rate_plcp; 306 u32 rate_flags; 307 308 /* HT rate doesn't make sense for a non data frame */ 309 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, 310 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n", 311 info->control.rates[0].flags, 312 info->control.rates[0].idx); 313 314 rate_idx = info->control.rates[0].idx; 315 /* if the rate isn't a well known legacy rate, take the lowest one */ 316 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 317 rate_idx = rate_lowest_index( 318 &mvm->nvm_data->bands[info->band], sta); 319 320 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 321 if (info->band == NL80211_BAND_5GHZ) 322 rate_idx += IWL_FIRST_OFDM_RATE; 323 324 /* For 2.4 GHZ band, check that there is no need to remap */ 325 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 326 327 /* Get PLCP rate for tx_cmd->rate_n_flags */ 328 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 329 330 if (info->band == NL80211_BAND_2GHZ && 331 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 332 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 333 else 334 rate_flags = 335 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 336 337 /* Set CCK flag as needed */ 338 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 339 rate_flags |= RATE_MCS_CCK_MSK; 340 341 return (u32)rate_plcp | rate_flags; 342 } 343 344 /* 345 * Sets the fields in the Tx cmd that are rate related 346 */ 347 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 348 struct ieee80211_tx_info *info, 349 struct ieee80211_sta *sta, __le16 fc) 350 { 351 /* Set retry limit on RTS packets */ 352 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 353 354 /* Set retry limit on DATA packets and Probe Responses*/ 355 if (ieee80211_is_probe_resp(fc)) { 356 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 357 tx_cmd->rts_retry_limit = 358 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 359 } else if (ieee80211_is_back_req(fc)) { 360 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 361 } else { 362 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 363 } 364 365 /* 366 * for data packets, rate info comes from the table inside the fw. This 367 * table is controlled by LINK_QUALITY commands 368 */ 369 370 if (ieee80211_is_data(fc) && sta) { 371 tx_cmd->initial_rate_index = 0; 372 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 373 return; 374 } else if (ieee80211_is_back_req(fc)) { 375 tx_cmd->tx_flags |= 376 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 377 } 378 379 mvm->mgmt_last_antenna_idx = 380 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 381 mvm->mgmt_last_antenna_idx); 382 383 /* Set the rate in the TX cmd */ 384 tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 385 } 386 387 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 388 u8 *crypto_hdr) 389 { 390 struct ieee80211_key_conf *keyconf = info->control.hw_key; 391 u64 pn; 392 393 pn = atomic64_inc_return(&keyconf->tx_pn); 394 crypto_hdr[0] = pn; 395 crypto_hdr[2] = 0; 396 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 397 crypto_hdr[1] = pn >> 8; 398 crypto_hdr[4] = pn >> 16; 399 crypto_hdr[5] = pn >> 24; 400 crypto_hdr[6] = pn >> 32; 401 crypto_hdr[7] = pn >> 40; 402 } 403 404 /* 405 * Sets the fields in the Tx cmd that are crypto related 406 */ 407 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 408 struct ieee80211_tx_info *info, 409 struct iwl_tx_cmd *tx_cmd, 410 struct sk_buff *skb_frag, 411 int hdrlen) 412 { 413 struct ieee80211_key_conf *keyconf = info->control.hw_key; 414 u8 *crypto_hdr = skb_frag->data + hdrlen; 415 u64 pn; 416 417 switch (keyconf->cipher) { 418 case WLAN_CIPHER_SUITE_CCMP: 419 case WLAN_CIPHER_SUITE_CCMP_256: 420 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 421 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 422 break; 423 424 case WLAN_CIPHER_SUITE_TKIP: 425 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 426 pn = atomic64_inc_return(&keyconf->tx_pn); 427 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 428 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 429 break; 430 431 case WLAN_CIPHER_SUITE_WEP104: 432 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 433 /* fall through */ 434 case WLAN_CIPHER_SUITE_WEP40: 435 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 436 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 437 TX_CMD_SEC_WEP_KEY_IDX_MSK); 438 439 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 440 break; 441 case WLAN_CIPHER_SUITE_GCMP: 442 case WLAN_CIPHER_SUITE_GCMP_256: 443 /* TODO: Taking the key from the table might introduce a race 444 * when PTK rekeying is done, having an old packets with a PN 445 * based on the old key but the message encrypted with a new 446 * one. 447 * Need to handle this. 448 */ 449 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE; 450 tx_cmd->key[0] = keyconf->hw_key_idx; 451 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 452 break; 453 default: 454 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 455 } 456 } 457 458 /* 459 * Allocates and sets the Tx cmd the driver data pointers in the skb 460 */ 461 static struct iwl_device_cmd * 462 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 463 struct ieee80211_tx_info *info, int hdrlen, 464 struct ieee80211_sta *sta, u8 sta_id) 465 { 466 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 467 struct iwl_device_cmd *dev_cmd; 468 struct iwl_tx_cmd *tx_cmd; 469 470 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 471 472 if (unlikely(!dev_cmd)) 473 return NULL; 474 475 memset(dev_cmd, 0, sizeof(*dev_cmd)); 476 dev_cmd->hdr.cmd = TX_CMD; 477 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 478 479 if (info->control.hw_key) 480 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 481 482 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 483 484 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 485 486 return dev_cmd; 487 } 488 489 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 490 struct iwl_device_cmd *cmd) 491 { 492 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 493 494 memset(&skb_info->status, 0, sizeof(skb_info->status)); 495 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 496 497 skb_info->driver_data[1] = cmd; 498 } 499 500 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 501 struct ieee80211_tx_info *info, __le16 fc) 502 { 503 if (!iwl_mvm_is_dqa_supported(mvm)) 504 return info->hw_queue; 505 506 switch (info->control.vif->type) { 507 case NL80211_IFTYPE_AP: 508 /* 509 * Handle legacy hostapd as well, where station may be added 510 * only after assoc. Take care of the case where we send a 511 * deauth to a station that we don't have. 512 */ 513 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc) || 514 ieee80211_is_deauth(fc)) 515 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; 516 if (info->hw_queue == info->control.vif->cab_queue) 517 return info->hw_queue; 518 519 WARN_ONCE(1, "fc=0x%02x", le16_to_cpu(fc)); 520 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; 521 case NL80211_IFTYPE_P2P_DEVICE: 522 if (ieee80211_is_mgmt(fc)) 523 return IWL_MVM_DQA_P2P_DEVICE_QUEUE; 524 if (info->hw_queue == info->control.vif->cab_queue) 525 return info->hw_queue; 526 527 WARN_ON_ONCE(1); 528 return IWL_MVM_DQA_P2P_DEVICE_QUEUE; 529 default: 530 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 531 return -1; 532 } 533 } 534 535 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 536 { 537 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 538 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 539 struct ieee80211_tx_info info; 540 struct iwl_device_cmd *dev_cmd; 541 struct iwl_tx_cmd *tx_cmd; 542 u8 sta_id; 543 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 544 int queue; 545 546 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used 547 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel 548 * queue. STATION (HS2.0) uses the auxiliary context of the FW, 549 * and hence needs to be sent on the aux queue 550 */ 551 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 552 skb_info->control.vif->type == NL80211_IFTYPE_STATION) 553 skb_info->hw_queue = mvm->aux_queue; 554 555 memcpy(&info, skb->cb, sizeof(info)); 556 557 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 558 return -1; 559 560 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 561 (!info.control.vif || 562 info.hw_queue != info.control.vif->cab_queue))) 563 return -1; 564 565 queue = info.hw_queue; 566 567 /* 568 * If the interface on which the frame is sent is the P2P_DEVICE 569 * or an AP/GO interface use the broadcast station associated 570 * with it; otherwise if the interface is a managed interface 571 * use the AP station associated with it for multicast traffic 572 * (this is not possible for unicast packets as a TLDS discovery 573 * response are sent without a station entry); otherwise use the 574 * AUX station. 575 * In DQA mode, if vif is of type STATION and frames are not multicast 576 * or offchannel, they should be sent from the BSS queue. 577 * For example, TDLS setup frames should be sent on this queue, 578 * as they go through the AP. 579 */ 580 sta_id = mvm->aux_sta.sta_id; 581 if (info.control.vif) { 582 struct iwl_mvm_vif *mvmvif = 583 iwl_mvm_vif_from_mac80211(info.control.vif); 584 585 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 586 info.control.vif->type == NL80211_IFTYPE_AP) { 587 sta_id = mvmvif->bcast_sta.sta_id; 588 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, 589 hdr->frame_control); 590 if (queue < 0) 591 return -1; 592 593 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 594 is_multicast_ether_addr(hdr->addr1)) { 595 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id); 596 597 if (ap_sta_id != IWL_MVM_STATION_COUNT) 598 sta_id = ap_sta_id; 599 } else if (iwl_mvm_is_dqa_supported(mvm) && 600 info.control.vif->type == NL80211_IFTYPE_STATION && 601 queue != mvm->aux_queue) { 602 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 603 } 604 } 605 606 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 607 608 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 609 if (!dev_cmd) 610 return -1; 611 612 /* From now on, we cannot access info->control */ 613 iwl_mvm_skb_prepare_status(skb, dev_cmd); 614 615 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 616 617 /* Copy MAC header from skb into command buffer */ 618 memcpy(tx_cmd->hdr, hdr, hdrlen); 619 620 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 621 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 622 return -1; 623 } 624 625 /* 626 * Increase the pending frames counter, so that later when a reply comes 627 * in and the counter is decreased - we don't start getting negative 628 * values. 629 * Note that we don't need to make sure it isn't agg'd, since we're 630 * TXing non-sta 631 */ 632 atomic_inc(&mvm->pending_frames[sta_id]); 633 634 return 0; 635 } 636 637 #ifdef CONFIG_INET 638 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 639 struct ieee80211_tx_info *info, 640 struct ieee80211_sta *sta, 641 struct sk_buff_head *mpdus_skb) 642 { 643 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 644 struct ieee80211_hdr *hdr = (void *)skb->data; 645 unsigned int mss = skb_shinfo(skb)->gso_size; 646 struct sk_buff *tmp, *next; 647 char cb[sizeof(skb->cb)]; 648 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 649 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 650 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 651 u16 snap_ip_tcp, pad, i = 0; 652 unsigned int dbg_max_amsdu_len; 653 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG; 654 u8 *qc, tid, txf; 655 656 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 657 tcp_hdrlen(skb); 658 659 qc = ieee80211_get_qos_ctl(hdr); 660 tid = *qc & IEEE80211_QOS_CTL_TID_MASK; 661 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 662 return -EINVAL; 663 664 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len); 665 666 if (!sta->max_amsdu_len || 667 !ieee80211_is_data_qos(hdr->frame_control) || 668 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) { 669 num_subframes = 1; 670 pad = 0; 671 goto segment; 672 } 673 674 /* 675 * Do not build AMSDU for IPv6 with extension headers. 676 * ask stack to segment and checkum the generated MPDUs for us. 677 */ 678 if (skb->protocol == htons(ETH_P_IPV6) && 679 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 680 IPPROTO_TCP) { 681 num_subframes = 1; 682 pad = 0; 683 netdev_features &= ~NETIF_F_CSUM_MASK; 684 goto segment; 685 } 686 687 /* 688 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 689 * during an BA session. 690 */ 691 if (info->flags & IEEE80211_TX_CTL_AMPDU && 692 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) { 693 num_subframes = 1; 694 pad = 0; 695 goto segment; 696 } 697 698 max_amsdu_len = sta->max_amsdu_len; 699 700 /* the Tx FIFO to which this A-MSDU will be routed */ 701 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 702 703 /* 704 * Don't send an AMSDU that will be longer than the TXF. 705 * Add a security margin of 256 for the TX command + headers. 706 * We also want to have the start of the next packet inside the 707 * fifo to be able to send bursts. 708 */ 709 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 710 mvm->shared_mem_cfg.txfifo_size[txf] - 256); 711 712 if (unlikely(dbg_max_amsdu_len)) 713 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 714 dbg_max_amsdu_len); 715 716 /* 717 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 718 * supported. This is a spec requirement (IEEE 802.11-2015 719 * section 8.7.3 NOTE 3). 720 */ 721 if (info->flags & IEEE80211_TX_CTL_AMPDU && 722 !sta->vht_cap.vht_supported) 723 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 724 725 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 726 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 727 pad = (4 - subf_len) & 0x3; 728 729 /* 730 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 731 * N * subf_len + (N - 1) * pad. 732 */ 733 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 734 if (num_subframes > 1) 735 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 736 737 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 738 tcp_hdrlen(skb) + skb->data_len; 739 740 /* 741 * Make sure we have enough TBs for the A-MSDU: 742 * 2 for each subframe 743 * 1 more for each fragment 744 * 1 more for the potential data in the header 745 */ 746 num_subframes = 747 min_t(unsigned int, num_subframes, 748 (mvm->trans->max_skb_frags - 1 - 749 skb_shinfo(skb)->nr_frags) / 2); 750 751 /* This skb fits in one single A-MSDU */ 752 if (num_subframes * mss >= tcp_payload_len) { 753 __skb_queue_tail(mpdus_skb, skb); 754 return 0; 755 } 756 757 /* 758 * Trick the segmentation function to make it 759 * create SKBs that can fit into one A-MSDU. 760 */ 761 segment: 762 skb_shinfo(skb)->gso_size = num_subframes * mss; 763 memcpy(cb, skb->cb, sizeof(cb)); 764 765 next = skb_gso_segment(skb, netdev_features); 766 skb_shinfo(skb)->gso_size = mss; 767 if (WARN_ON_ONCE(IS_ERR(next))) 768 return -EINVAL; 769 else if (next) 770 consume_skb(skb); 771 772 while (next) { 773 tmp = next; 774 next = tmp->next; 775 776 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 777 /* 778 * Compute the length of all the data added for the A-MSDU. 779 * This will be used to compute the length to write in the TX 780 * command. We have: SNAP + IP + TCP for n -1 subframes and 781 * ETH header for n subframes. 782 */ 783 tcp_payload_len = skb_tail_pointer(tmp) - 784 skb_transport_header(tmp) - 785 tcp_hdrlen(tmp) + tmp->data_len; 786 787 if (ipv4) 788 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 789 790 if (tcp_payload_len > mss) { 791 skb_shinfo(tmp)->gso_size = mss; 792 } else { 793 qc = ieee80211_get_qos_ctl((void *)tmp->data); 794 795 if (ipv4) 796 ip_send_check(ip_hdr(tmp)); 797 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 798 skb_shinfo(tmp)->gso_size = 0; 799 } 800 801 tmp->prev = NULL; 802 tmp->next = NULL; 803 804 __skb_queue_tail(mpdus_skb, tmp); 805 i++; 806 } 807 808 return 0; 809 } 810 #else /* CONFIG_INET */ 811 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 812 struct ieee80211_tx_info *info, 813 struct ieee80211_sta *sta, 814 struct sk_buff_head *mpdus_skb) 815 { 816 /* Impossible to get TSO with CONFIG_INET */ 817 WARN_ON(1); 818 819 return -1; 820 } 821 #endif 822 823 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, 824 struct iwl_mvm_sta *mvm_sta, u8 tid, 825 struct sk_buff *skb) 826 { 827 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 828 u8 mac_queue = info->hw_queue; 829 struct sk_buff_head *deferred_tx_frames; 830 831 lockdep_assert_held(&mvm_sta->lock); 832 833 mvm_sta->deferred_traffic_tid_map |= BIT(tid); 834 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); 835 836 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; 837 838 skb_queue_tail(deferred_tx_frames, skb); 839 840 /* 841 * The first deferred frame should've stopped the MAC queues, so we 842 * should never get a second deferred frame for the RA/TID. 843 */ 844 if (!WARN(skb_queue_len(deferred_tx_frames) != 1, 845 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid, 846 skb_queue_len(deferred_tx_frames))) { 847 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); 848 schedule_work(&mvm->add_stream_wk); 849 } 850 } 851 852 /* Check if there are any timed-out TIDs on a given shared TXQ */ 853 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 854 { 855 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 856 unsigned long now = jiffies; 857 int tid; 858 859 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 860 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 861 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 862 return true; 863 } 864 865 return false; 866 } 867 868 /* 869 * Sets the fields in the Tx cmd that are crypto related 870 */ 871 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 872 struct ieee80211_tx_info *info, 873 struct ieee80211_sta *sta) 874 { 875 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 876 struct iwl_mvm_sta *mvmsta; 877 struct iwl_device_cmd *dev_cmd; 878 struct iwl_tx_cmd *tx_cmd; 879 __le16 fc; 880 u16 seq_number = 0; 881 u8 tid = IWL_MAX_TID_COUNT; 882 u8 txq_id = info->hw_queue; 883 bool is_ampdu = false; 884 int hdrlen; 885 886 mvmsta = iwl_mvm_sta_from_mac80211(sta); 887 fc = hdr->frame_control; 888 hdrlen = ieee80211_hdrlen(fc); 889 890 if (WARN_ON_ONCE(!mvmsta)) 891 return -1; 892 893 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) 894 return -1; 895 896 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 897 sta, mvmsta->sta_id); 898 if (!dev_cmd) 899 goto drop; 900 901 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 902 903 /* 904 * we handle that entirely ourselves -- for uAPSD the firmware 905 * will always send a notification, and for PS-Poll responses 906 * we'll notify mac80211 when getting frame status 907 */ 908 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 909 910 spin_lock(&mvmsta->lock); 911 912 /* nullfunc frames should go to the MGMT queue regardless of QOS, 913 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 914 * assignment of MGMT TID 915 */ 916 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 917 u8 *qc = NULL; 918 qc = ieee80211_get_qos_ctl(hdr); 919 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 920 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 921 goto drop_unlock_sta; 922 923 seq_number = mvmsta->tid_data[tid].seq_number; 924 seq_number &= IEEE80211_SCTL_SEQ; 925 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 926 hdr->seq_ctrl |= cpu_to_le16(seq_number); 927 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 928 if (WARN_ON_ONCE(is_ampdu && 929 mvmsta->tid_data[tid].state != IWL_AGG_ON)) 930 goto drop_unlock_sta; 931 } 932 933 if (iwl_mvm_is_dqa_supported(mvm) || is_ampdu) 934 txq_id = mvmsta->tid_data[tid].txq_id; 935 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) { 936 /* default to TID 0 for non-QoS packets */ 937 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; 938 939 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; 940 } 941 942 /* Copy MAC header from skb into command buffer */ 943 memcpy(tx_cmd->hdr, hdr, hdrlen); 944 945 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 946 947 /* Check if TXQ needs to be allocated or re-activated */ 948 if (unlikely(txq_id == IEEE80211_INVAL_HW_QUEUE || 949 !mvmsta->tid_data[tid].is_tid_active) && 950 iwl_mvm_is_dqa_supported(mvm)) { 951 /* If TXQ needs to be allocated... */ 952 if (txq_id == IEEE80211_INVAL_HW_QUEUE) { 953 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); 954 955 /* 956 * The frame is now deferred, and the worker scheduled 957 * will re-allocate it, so we can free it for now. 958 */ 959 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 960 spin_unlock(&mvmsta->lock); 961 return 0; 962 } 963 964 /* If we are here - TXQ exists and needs to be re-activated */ 965 spin_lock(&mvm->queue_info_lock); 966 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 967 mvmsta->tid_data[tid].is_tid_active = true; 968 spin_unlock(&mvm->queue_info_lock); 969 970 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n", 971 txq_id); 972 } 973 974 if (iwl_mvm_is_dqa_supported(mvm)) { 975 /* Keep track of the time of the last frame for this RA/TID */ 976 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 977 978 /* 979 * If we have timed-out TIDs - schedule the worker that will 980 * reconfig the queues and update them 981 * 982 * Note that the mvm->queue_info_lock isn't being taken here in 983 * order to not serialize the TX flow. This isn't dangerous 984 * because scheduling mvm->add_stream_wk can't ruin the state, 985 * and if we DON'T schedule it due to some race condition then 986 * next TX we get here we will. 987 */ 988 if (unlikely(mvm->queue_info[txq_id].status == 989 IWL_MVM_QUEUE_SHARED && 990 iwl_mvm_txq_should_update(mvm, txq_id))) 991 schedule_work(&mvm->add_stream_wk); 992 } 993 994 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 995 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 996 997 /* From now on, we cannot access info->control */ 998 iwl_mvm_skb_prepare_status(skb, dev_cmd); 999 1000 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1001 goto drop_unlock_sta; 1002 1003 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1004 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1005 1006 spin_unlock(&mvmsta->lock); 1007 1008 /* Increase pending frames count if this isn't AMPDU */ 1009 if ((iwl_mvm_is_dqa_supported(mvm) && 1010 mvmsta->tid_data[tx_cmd->tid_tspec].state != IWL_AGG_ON && 1011 mvmsta->tid_data[tx_cmd->tid_tspec].state != IWL_AGG_STARTING) || 1012 (!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_tid_queued(tid_data) == 0) { 1084 /* 1085 * Now that this aggregation queue is empty tell mac80211 so it 1086 * knows we no longer have frames buffered for the station on 1087 * this TID (for the TIM bitmap calculation.) 1088 */ 1089 ieee80211_sta_set_buffered(sta, tid, false); 1090 } 1091 1092 if (tid_data->ssn != tid_data->next_reclaimed) 1093 return; 1094 1095 switch (tid_data->state) { 1096 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1097 IWL_DEBUG_TX_QUEUES(mvm, 1098 "Can continue addBA flow ssn = next_recl = %d\n", 1099 tid_data->next_reclaimed); 1100 tid_data->state = IWL_AGG_STARTING; 1101 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1102 break; 1103 1104 case IWL_EMPTYING_HW_QUEUE_DELBA: 1105 IWL_DEBUG_TX_QUEUES(mvm, 1106 "Can continue DELBA flow ssn = next_recl = %d\n", 1107 tid_data->next_reclaimed); 1108 if (!iwl_mvm_is_dqa_supported(mvm)) { 1109 u8 mac80211_ac = tid_to_mac80211_ac[tid]; 1110 1111 iwl_mvm_disable_txq(mvm, tid_data->txq_id, 1112 vif->hw_queue[mac80211_ac], tid, 1113 CMD_ASYNC); 1114 } 1115 tid_data->state = IWL_AGG_OFF; 1116 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1117 break; 1118 1119 default: 1120 break; 1121 } 1122 } 1123 1124 #ifdef CONFIG_IWLWIFI_DEBUG 1125 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1126 { 1127 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1128 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1129 1130 switch (status & TX_STATUS_MSK) { 1131 case TX_STATUS_SUCCESS: 1132 return "SUCCESS"; 1133 TX_STATUS_POSTPONE(DELAY); 1134 TX_STATUS_POSTPONE(FEW_BYTES); 1135 TX_STATUS_POSTPONE(BT_PRIO); 1136 TX_STATUS_POSTPONE(QUIET_PERIOD); 1137 TX_STATUS_POSTPONE(CALC_TTAK); 1138 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1139 TX_STATUS_FAIL(SHORT_LIMIT); 1140 TX_STATUS_FAIL(LONG_LIMIT); 1141 TX_STATUS_FAIL(UNDERRUN); 1142 TX_STATUS_FAIL(DRAIN_FLOW); 1143 TX_STATUS_FAIL(RFKILL_FLUSH); 1144 TX_STATUS_FAIL(LIFE_EXPIRE); 1145 TX_STATUS_FAIL(DEST_PS); 1146 TX_STATUS_FAIL(HOST_ABORTED); 1147 TX_STATUS_FAIL(BT_RETRY); 1148 TX_STATUS_FAIL(STA_INVALID); 1149 TX_STATUS_FAIL(FRAG_DROPPED); 1150 TX_STATUS_FAIL(TID_DISABLE); 1151 TX_STATUS_FAIL(FIFO_FLUSHED); 1152 TX_STATUS_FAIL(SMALL_CF_POLL); 1153 TX_STATUS_FAIL(FW_DROP); 1154 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1155 } 1156 1157 return "UNKNOWN"; 1158 1159 #undef TX_STATUS_FAIL 1160 #undef TX_STATUS_POSTPONE 1161 } 1162 #endif /* CONFIG_IWLWIFI_DEBUG */ 1163 1164 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1165 enum nl80211_band band, 1166 struct ieee80211_tx_rate *r) 1167 { 1168 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1169 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1170 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1171 case RATE_MCS_CHAN_WIDTH_20: 1172 break; 1173 case RATE_MCS_CHAN_WIDTH_40: 1174 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1175 break; 1176 case RATE_MCS_CHAN_WIDTH_80: 1177 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1178 break; 1179 case RATE_MCS_CHAN_WIDTH_160: 1180 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1181 break; 1182 } 1183 if (rate_n_flags & RATE_MCS_SGI_MSK) 1184 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1185 if (rate_n_flags & RATE_MCS_HT_MSK) { 1186 r->flags |= IEEE80211_TX_RC_MCS; 1187 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1188 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1189 ieee80211_rate_set_vht( 1190 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1191 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1192 RATE_VHT_MCS_NSS_POS) + 1); 1193 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1194 } else { 1195 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1196 band); 1197 } 1198 } 1199 1200 /** 1201 * translate ucode response to mac80211 tx status control values 1202 */ 1203 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1204 struct ieee80211_tx_info *info) 1205 { 1206 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1207 1208 info->status.antenna = 1209 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1210 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1211 } 1212 1213 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1214 u32 status) 1215 { 1216 struct iwl_fw_dbg_trigger_tlv *trig; 1217 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1218 int i; 1219 1220 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) 1221 return; 1222 1223 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); 1224 status_trig = (void *)trig->data; 1225 1226 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) 1227 return; 1228 1229 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1230 /* don't collect on status 0 */ 1231 if (!status_trig->statuses[i].status) 1232 break; 1233 1234 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1235 continue; 1236 1237 iwl_mvm_fw_dbg_collect_trig(mvm, trig, 1238 "Tx status %d was received", 1239 status & TX_STATUS_MSK); 1240 break; 1241 } 1242 } 1243 1244 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1245 struct iwl_rx_packet *pkt) 1246 { 1247 struct ieee80211_sta *sta; 1248 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1249 int txq_id = SEQ_TO_QUEUE(sequence); 1250 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1251 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1252 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1253 u32 status = le16_to_cpu(tx_resp->status.status); 1254 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); 1255 struct iwl_mvm_sta *mvmsta; 1256 struct sk_buff_head skbs; 1257 u8 skb_freed = 0; 1258 u16 next_reclaimed, seq_ctl; 1259 bool is_ndp = false; 1260 bool txq_agg = false; /* Is this TXQ aggregated */ 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 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1287 break; 1288 default: 1289 break; 1290 } 1291 1292 iwl_mvm_tx_status_check_trigger(mvm, status); 1293 1294 info->status.rates[0].count = tx_resp->failure_frame + 1; 1295 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1296 info); 1297 info->status.status_driver_data[1] = 1298 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1299 1300 /* Single frame failure in an AMPDU queue => send BAR */ 1301 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1302 !(info->flags & IEEE80211_TX_STAT_ACK) && 1303 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) 1304 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1305 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1306 1307 /* W/A FW bug: seq_ctl is wrong when the status isn't success */ 1308 if (status != TX_STATUS_SUCCESS) { 1309 struct ieee80211_hdr *hdr = (void *)skb->data; 1310 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1311 } 1312 1313 if (unlikely(!seq_ctl)) { 1314 struct ieee80211_hdr *hdr = (void *)skb->data; 1315 1316 /* 1317 * If it is an NDP, we can't update next_reclaim since 1318 * its sequence control is 0. Note that for that same 1319 * reason, NDPs are never sent to A-MPDU'able queues 1320 * so that we can never have more than one freed frame 1321 * for a single Tx resonse (see WARN_ON below). 1322 */ 1323 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1324 is_ndp = true; 1325 } 1326 1327 /* 1328 * TODO: this is not accurate if we are freeing more than one 1329 * packet. 1330 */ 1331 info->status.tx_time = 1332 le16_to_cpu(tx_resp->wireless_media_time); 1333 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1334 info->status.status_driver_data[0] = 1335 (void *)(uintptr_t)tx_resp->reduced_tpc; 1336 1337 ieee80211_tx_status(mvm->hw, skb); 1338 } 1339 1340 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) { 1341 /* If this is an aggregation queue, we use the ssn since: 1342 * ssn = wifi seq_num % 256. 1343 * The seq_ctl is the sequence control of the packet to which 1344 * this Tx response relates. But if there is a hole in the 1345 * bitmap of the BA we received, this Tx response may allow to 1346 * reclaim the hole and all the subsequent packets that were 1347 * already acked. In that case, seq_ctl != ssn, and the next 1348 * packet to be reclaimed will be ssn and not seq_ctl. In that 1349 * case, several packets will be reclaimed even if 1350 * frame_count = 1. 1351 * 1352 * The ssn is the index (% 256) of the latest packet that has 1353 * treated (acked / dropped) + 1. 1354 */ 1355 next_reclaimed = ssn; 1356 } else { 1357 /* The next packet to be reclaimed is the one after this one */ 1358 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); 1359 } 1360 1361 IWL_DEBUG_TX_REPLY(mvm, 1362 "TXQ %d status %s (0x%08x)\n", 1363 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1364 1365 IWL_DEBUG_TX_REPLY(mvm, 1366 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1367 le32_to_cpu(tx_resp->initial_rate), 1368 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1369 ssn, next_reclaimed, seq_ctl); 1370 1371 rcu_read_lock(); 1372 1373 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1374 /* 1375 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1376 * the firmware while we still have packets for it in the Tx queues. 1377 */ 1378 if (WARN_ON_ONCE(!sta)) 1379 goto out; 1380 1381 if (!IS_ERR(sta)) { 1382 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1383 1384 if (tid != IWL_TID_NON_QOS) { 1385 struct iwl_mvm_tid_data *tid_data = 1386 &mvmsta->tid_data[tid]; 1387 bool send_eosp_ndp = false; 1388 1389 spin_lock_bh(&mvmsta->lock); 1390 if (iwl_mvm_is_dqa_supported(mvm)) { 1391 enum iwl_mvm_agg_state state; 1392 1393 state = mvmsta->tid_data[tid].state; 1394 txq_agg = (state == IWL_AGG_ON || 1395 state == IWL_EMPTYING_HW_QUEUE_DELBA); 1396 } else { 1397 txq_agg = txq_id >= mvm->first_agg_queue; 1398 } 1399 1400 if (!is_ndp) { 1401 tid_data->next_reclaimed = next_reclaimed; 1402 IWL_DEBUG_TX_REPLY(mvm, 1403 "Next reclaimed packet:%d\n", 1404 next_reclaimed); 1405 } else { 1406 IWL_DEBUG_TX_REPLY(mvm, 1407 "NDP - don't update next_reclaimed\n"); 1408 } 1409 1410 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1411 1412 if (mvmsta->sleep_tx_count) { 1413 mvmsta->sleep_tx_count--; 1414 if (mvmsta->sleep_tx_count && 1415 !iwl_mvm_tid_queued(tid_data)) { 1416 /* 1417 * The number of frames in the queue 1418 * dropped to 0 even if we sent less 1419 * frames than we thought we had on the 1420 * Tx queue. 1421 * This means we had holes in the BA 1422 * window that we just filled, ask 1423 * mac80211 to send EOSP since the 1424 * firmware won't know how to do that. 1425 * Send NDP and the firmware will send 1426 * EOSP notification that will trigger 1427 * a call to ieee80211_sta_eosp(). 1428 */ 1429 send_eosp_ndp = true; 1430 } 1431 } 1432 1433 spin_unlock_bh(&mvmsta->lock); 1434 if (send_eosp_ndp) { 1435 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1436 IEEE80211_FRAME_RELEASE_UAPSD, 1437 1, tid, false, false); 1438 mvmsta->sleep_tx_count = 0; 1439 ieee80211_send_eosp_nullfunc(sta, tid); 1440 } 1441 } 1442 1443 if (mvmsta->next_status_eosp) { 1444 mvmsta->next_status_eosp = false; 1445 ieee80211_sta_eosp(sta); 1446 } 1447 } else { 1448 mvmsta = NULL; 1449 } 1450 1451 /* 1452 * If the txq is not an AMPDU queue, there is no chance we freed 1453 * several skbs. Check that out... 1454 */ 1455 if (txq_agg) 1456 goto out; 1457 1458 /* We can't free more than one frame at once on a shared queue */ 1459 WARN_ON(!iwl_mvm_is_dqa_supported(mvm) && (skb_freed > 1)); 1460 1461 /* If we have still frames for this STA nothing to do here */ 1462 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) 1463 goto out; 1464 1465 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { 1466 1467 /* 1468 * If there are no pending frames for this STA and 1469 * the tx to this station is not disabled, notify 1470 * mac80211 that this station can now wake up in its 1471 * STA table. 1472 * If mvmsta is not NULL, sta is valid. 1473 */ 1474 1475 spin_lock_bh(&mvmsta->lock); 1476 1477 if (!mvmsta->disable_tx) 1478 ieee80211_sta_block_awake(mvm->hw, sta, false); 1479 1480 spin_unlock_bh(&mvmsta->lock); 1481 } 1482 1483 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { 1484 /* 1485 * We are draining and this was the last packet - pre_rcu_remove 1486 * has been called already. We might be after the 1487 * synchronize_net already. 1488 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. 1489 */ 1490 set_bit(sta_id, mvm->sta_drained); 1491 schedule_work(&mvm->sta_drained_wk); 1492 } 1493 1494 out: 1495 rcu_read_unlock(); 1496 } 1497 1498 #ifdef CONFIG_IWLWIFI_DEBUG 1499 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1500 static const char *iwl_get_agg_tx_status(u16 status) 1501 { 1502 switch (status & AGG_TX_STATE_STATUS_MSK) { 1503 AGG_TX_STATE_(TRANSMITTED); 1504 AGG_TX_STATE_(UNDERRUN); 1505 AGG_TX_STATE_(BT_PRIO); 1506 AGG_TX_STATE_(FEW_BYTES); 1507 AGG_TX_STATE_(ABORT); 1508 AGG_TX_STATE_(LAST_SENT_TTL); 1509 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1510 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1511 AGG_TX_STATE_(SCD_QUERY); 1512 AGG_TX_STATE_(TEST_BAD_CRC32); 1513 AGG_TX_STATE_(RESPONSE); 1514 AGG_TX_STATE_(DUMP_TX); 1515 AGG_TX_STATE_(DELAY_TX); 1516 } 1517 1518 return "UNKNOWN"; 1519 } 1520 1521 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1522 struct iwl_rx_packet *pkt) 1523 { 1524 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1525 struct agg_tx_status *frame_status = &tx_resp->status; 1526 int i; 1527 1528 for (i = 0; i < tx_resp->frame_count; i++) { 1529 u16 fstatus = le16_to_cpu(frame_status[i].status); 1530 1531 IWL_DEBUG_TX_REPLY(mvm, 1532 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1533 iwl_get_agg_tx_status(fstatus), 1534 fstatus & AGG_TX_STATE_STATUS_MSK, 1535 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1536 AGG_TX_STATE_TRY_CNT_POS, 1537 le16_to_cpu(frame_status[i].sequence)); 1538 } 1539 } 1540 #else 1541 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1542 struct iwl_rx_packet *pkt) 1543 {} 1544 #endif /* CONFIG_IWLWIFI_DEBUG */ 1545 1546 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1547 struct iwl_rx_packet *pkt) 1548 { 1549 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1550 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1551 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1552 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1553 struct iwl_mvm_sta *mvmsta; 1554 int queue = SEQ_TO_QUEUE(sequence); 1555 1556 if (WARN_ON_ONCE(queue < mvm->first_agg_queue && 1557 (!iwl_mvm_is_dqa_supported(mvm) || 1558 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))) 1559 return; 1560 1561 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) 1562 return; 1563 1564 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1565 1566 rcu_read_lock(); 1567 1568 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1569 1570 if (!WARN_ON_ONCE(!mvmsta)) { 1571 mvmsta->tid_data[tid].rate_n_flags = 1572 le32_to_cpu(tx_resp->initial_rate); 1573 mvmsta->tid_data[tid].tx_time = 1574 le16_to_cpu(tx_resp->wireless_media_time); 1575 } 1576 1577 rcu_read_unlock(); 1578 } 1579 1580 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1581 { 1582 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1583 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1584 1585 if (tx_resp->frame_count == 1) 1586 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1587 else 1588 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1589 } 1590 1591 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1592 int txq, int index, 1593 struct ieee80211_tx_info *ba_info, u32 rate) 1594 { 1595 struct sk_buff_head reclaimed_skbs; 1596 struct iwl_mvm_tid_data *tid_data; 1597 struct ieee80211_sta *sta; 1598 struct iwl_mvm_sta *mvmsta; 1599 struct sk_buff *skb; 1600 int freed; 1601 1602 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1603 tid >= IWL_MAX_TID_COUNT, 1604 "sta_id %d tid %d", sta_id, tid)) 1605 return; 1606 1607 rcu_read_lock(); 1608 1609 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1610 1611 /* Reclaiming frames for a station that has been deleted ? */ 1612 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1613 rcu_read_unlock(); 1614 return; 1615 } 1616 1617 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1618 tid_data = &mvmsta->tid_data[tid]; 1619 1620 if (tid_data->txq_id != txq) { 1621 IWL_ERR(mvm, 1622 "invalid BA notification: Q %d, tid %d\n", 1623 tid_data->txq_id, tid); 1624 rcu_read_unlock(); 1625 return; 1626 } 1627 1628 spin_lock_bh(&mvmsta->lock); 1629 1630 __skb_queue_head_init(&reclaimed_skbs); 1631 1632 /* 1633 * Release all TFDs before the SSN, i.e. all TFDs in front of 1634 * block-ack window (we assume that they've been successfully 1635 * transmitted ... if not, it's too late anyway). 1636 */ 1637 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1638 1639 tid_data->next_reclaimed = index; 1640 1641 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1642 1643 freed = 0; 1644 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1645 1646 skb_queue_walk(&reclaimed_skbs, skb) { 1647 struct ieee80211_hdr *hdr = (void *)skb->data; 1648 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1649 1650 if (ieee80211_is_data_qos(hdr->frame_control)) 1651 freed++; 1652 else 1653 WARN_ON_ONCE(1); 1654 1655 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1656 1657 memset(&info->status, 0, sizeof(info->status)); 1658 /* Packet was transmitted successfully, failures come as single 1659 * frames because before failing a frame the firmware transmits 1660 * it without aggregation at least once. 1661 */ 1662 info->flags |= IEEE80211_TX_STAT_ACK; 1663 1664 /* this is the first skb we deliver in this batch */ 1665 /* put the rate scaling data there */ 1666 if (freed == 1) { 1667 info->flags |= IEEE80211_TX_STAT_AMPDU; 1668 memcpy(&info->status, &ba_info->status, 1669 sizeof(ba_info->status)); 1670 iwl_mvm_hwrate_to_tx_status(rate, info); 1671 } 1672 } 1673 1674 spin_unlock_bh(&mvmsta->lock); 1675 1676 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1677 * possible (i.e. first MPDU in the aggregation wasn't acked) 1678 * Still it's important to update RS about sent vs. acked. 1679 */ 1680 if (skb_queue_empty(&reclaimed_skbs)) { 1681 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1682 1683 if (mvmsta->vif) 1684 chanctx_conf = 1685 rcu_dereference(mvmsta->vif->chanctx_conf); 1686 1687 if (WARN_ON_ONCE(!chanctx_conf)) 1688 goto out; 1689 1690 ba_info->band = chanctx_conf->def.chan->band; 1691 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1692 1693 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 1694 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1695 } 1696 1697 out: 1698 rcu_read_unlock(); 1699 1700 while (!skb_queue_empty(&reclaimed_skbs)) { 1701 skb = __skb_dequeue(&reclaimed_skbs); 1702 ieee80211_tx_status(mvm->hw, skb); 1703 } 1704 } 1705 1706 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1707 { 1708 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1709 int sta_id, tid, txq, index; 1710 struct ieee80211_tx_info ba_info = {}; 1711 struct iwl_mvm_ba_notif *ba_notif; 1712 struct iwl_mvm_tid_data *tid_data; 1713 struct iwl_mvm_sta *mvmsta; 1714 1715 if (iwl_mvm_has_new_tx_api(mvm)) { 1716 struct iwl_mvm_compressed_ba_notif *ba_res = 1717 (void *)pkt->data; 1718 1719 sta_id = ba_res->sta_id; 1720 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1721 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1722 ba_info.status.tx_time = 1723 (u16)le32_to_cpu(ba_res->wireless_time); 1724 ba_info.status.status_driver_data[0] = 1725 (void *)(uintptr_t)ba_res->reduced_txp; 1726 1727 /* 1728 * TODO: 1729 * When supporting multi TID aggregations - we need to move 1730 * next_reclaimed to be per TXQ and not per TID or handle it 1731 * in a different way. 1732 * This will go together with SN and AddBA offload and cannot 1733 * be handled properly for now. 1734 */ 1735 WARN_ON(le16_to_cpu(ba_res->tfd_cnt) != 1); 1736 iwl_mvm_tx_reclaim(mvm, sta_id, ba_res->ra_tid[0].tid, 1737 (int)ba_res->tfd[0].q_num, 1738 le16_to_cpu(ba_res->tfd[0].tfd_index), 1739 &ba_info, le32_to_cpu(ba_res->tx_rate)); 1740 1741 IWL_DEBUG_TX_REPLY(mvm, 1742 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1743 sta_id, le32_to_cpu(ba_res->flags), 1744 le16_to_cpu(ba_res->txed), 1745 le16_to_cpu(ba_res->done)); 1746 return; 1747 } 1748 1749 ba_notif = (void *)pkt->data; 1750 sta_id = ba_notif->sta_id; 1751 tid = ba_notif->tid; 1752 /* "flow" corresponds to Tx queue */ 1753 txq = le16_to_cpu(ba_notif->scd_flow); 1754 /* "ssn" is start of block-ack Tx window, corresponds to index 1755 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1756 index = le16_to_cpu(ba_notif->scd_ssn); 1757 1758 rcu_read_lock(); 1759 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1760 if (WARN_ON_ONCE(!mvmsta)) { 1761 rcu_read_unlock(); 1762 return; 1763 } 1764 1765 tid_data = &mvmsta->tid_data[tid]; 1766 1767 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1768 ba_info.status.ampdu_len = ba_notif->txed; 1769 ba_info.status.tx_time = tid_data->tx_time; 1770 ba_info.status.status_driver_data[0] = 1771 (void *)(uintptr_t)ba_notif->reduced_txp; 1772 1773 rcu_read_unlock(); 1774 1775 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1776 tid_data->rate_n_flags); 1777 1778 IWL_DEBUG_TX_REPLY(mvm, 1779 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1780 (u8 *)&ba_notif->sta_addr_lo32, ba_notif->sta_id); 1781 1782 IWL_DEBUG_TX_REPLY(mvm, 1783 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1784 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1785 le64_to_cpu(ba_notif->bitmap), txq, index, 1786 ba_notif->txed, ba_notif->txed_2_done); 1787 1788 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1789 ba_notif->reduced_txp); 1790 } 1791 1792 /* 1793 * Note that there are transports that buffer frames before they reach 1794 * the firmware. This means that after flush_tx_path is called, the 1795 * queue might not be empty. The race-free way to handle this is to: 1796 * 1) set the station as draining 1797 * 2) flush the Tx path 1798 * 3) wait for the transport queues to be empty 1799 */ 1800 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 1801 { 1802 int ret; 1803 struct iwl_tx_path_flush_cmd flush_cmd = { 1804 .queues_ctl = cpu_to_le32(tfd_msk), 1805 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 1806 }; 1807 1808 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1809 sizeof(flush_cmd), &flush_cmd); 1810 if (ret) 1811 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1812 return ret; 1813 } 1814