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 | TX_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 return info->hw_queue; 495 496 switch (info->control.vif->type) { 497 case NL80211_IFTYPE_AP: 498 /* 499 * handle legacy hostapd as well, where station may be added 500 * only after assoc. 501 */ 502 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc)) 503 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; 504 if (info->hw_queue == info->control.vif->cab_queue) 505 return info->hw_queue; 506 507 WARN_ON_ONCE(1); 508 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; 509 case NL80211_IFTYPE_P2P_DEVICE: 510 if (ieee80211_is_mgmt(fc)) 511 return IWL_MVM_DQA_P2P_DEVICE_QUEUE; 512 if (info->hw_queue == info->control.vif->cab_queue) 513 return info->hw_queue; 514 515 WARN_ON_ONCE(1); 516 return IWL_MVM_DQA_P2P_DEVICE_QUEUE; 517 default: 518 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 519 return -1; 520 } 521 } 522 523 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 524 { 525 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 526 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 527 struct ieee80211_tx_info info; 528 struct iwl_device_cmd *dev_cmd; 529 struct iwl_tx_cmd *tx_cmd; 530 u8 sta_id; 531 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 532 int queue; 533 534 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used 535 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel 536 * queue. STATION (HS2.0) uses the auxiliary context of the FW, 537 * and hence needs to be sent on the aux queue 538 */ 539 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 540 skb_info->control.vif->type == NL80211_IFTYPE_STATION) 541 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue; 542 543 memcpy(&info, skb->cb, sizeof(info)); 544 545 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 546 return -1; 547 548 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 549 (!info.control.vif || 550 info.hw_queue != info.control.vif->cab_queue))) 551 return -1; 552 553 /* This holds the amsdu headers length */ 554 skb_info->driver_data[0] = (void *)(uintptr_t)0; 555 556 queue = info.hw_queue; 557 558 /* 559 * If the interface on which the frame is sent is the P2P_DEVICE 560 * or an AP/GO interface use the broadcast station associated 561 * with it; otherwise if the interface is a managed interface 562 * use the AP station associated with it for multicast traffic 563 * (this is not possible for unicast packets as a TLDS discovery 564 * response are sent without a station entry); otherwise use the 565 * AUX station. 566 * In DQA mode, if vif is of type STATION and frames are not multicast, 567 * they should be sent from the BSS queue. For example, TDLS setup 568 * frames should be sent on this queue, as they go through the AP. 569 */ 570 sta_id = mvm->aux_sta.sta_id; 571 if (info.control.vif) { 572 struct iwl_mvm_vif *mvmvif = 573 iwl_mvm_vif_from_mac80211(info.control.vif); 574 575 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 576 info.control.vif->type == NL80211_IFTYPE_AP) { 577 sta_id = mvmvif->bcast_sta.sta_id; 578 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, 579 hdr->frame_control); 580 if (queue < 0) 581 return -1; 582 583 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 584 is_multicast_ether_addr(hdr->addr1)) { 585 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id); 586 587 if (ap_sta_id != IWL_MVM_STATION_COUNT) 588 sta_id = ap_sta_id; 589 } else if (iwl_mvm_is_dqa_supported(mvm) && 590 info.control.vif->type == NL80211_IFTYPE_STATION) { 591 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 592 } 593 } 594 595 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 596 597 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 598 if (!dev_cmd) 599 return -1; 600 601 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 602 603 /* Copy MAC header from skb into command buffer */ 604 memcpy(tx_cmd->hdr, hdr, hdrlen); 605 606 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 607 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 608 return -1; 609 } 610 611 /* 612 * Increase the pending frames counter, so that later when a reply comes 613 * in and the counter is decreased - we don't start getting negative 614 * values. 615 * Note that we don't need to make sure it isn't agg'd, since we're 616 * TXing non-sta 617 */ 618 atomic_inc(&mvm->pending_frames[sta_id]); 619 620 return 0; 621 } 622 623 #ifdef CONFIG_INET 624 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 625 struct ieee80211_tx_info *info, 626 struct ieee80211_sta *sta, 627 struct sk_buff_head *mpdus_skb) 628 { 629 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 630 struct ieee80211_hdr *hdr = (void *)skb->data; 631 unsigned int mss = skb_shinfo(skb)->gso_size; 632 struct sk_buff *tmp, *next; 633 char cb[sizeof(skb->cb)]; 634 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 635 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 636 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 637 u16 amsdu_add, snap_ip_tcp, pad, i = 0; 638 unsigned int dbg_max_amsdu_len; 639 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG; 640 u8 *qc, tid, txf; 641 642 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 643 tcp_hdrlen(skb); 644 645 qc = ieee80211_get_qos_ctl(hdr); 646 tid = *qc & IEEE80211_QOS_CTL_TID_MASK; 647 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 648 return -EINVAL; 649 650 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len); 651 652 if (!sta->max_amsdu_len || 653 !ieee80211_is_data_qos(hdr->frame_control) || 654 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) { 655 num_subframes = 1; 656 pad = 0; 657 goto segment; 658 } 659 660 /* 661 * Do not build AMSDU for IPv6 with extension headers. 662 * ask stack to segment and checkum the generated MPDUs for us. 663 */ 664 if (skb->protocol == htons(ETH_P_IPV6) && 665 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 666 IPPROTO_TCP) { 667 num_subframes = 1; 668 pad = 0; 669 netdev_features &= ~NETIF_F_CSUM_MASK; 670 goto segment; 671 } 672 673 /* 674 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 675 * during an BA session. 676 */ 677 if (info->flags & IEEE80211_TX_CTL_AMPDU && 678 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) { 679 num_subframes = 1; 680 pad = 0; 681 goto segment; 682 } 683 684 max_amsdu_len = sta->max_amsdu_len; 685 686 /* the Tx FIFO to which this A-MSDU will be routed */ 687 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 688 689 /* 690 * Don't send an AMSDU that will be longer than the TXF. 691 * Add a security margin of 256 for the TX command + headers. 692 * We also want to have the start of the next packet inside the 693 * fifo to be able to send bursts. 694 */ 695 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 696 mvm->shared_mem_cfg.txfifo_size[txf] - 256); 697 698 if (unlikely(dbg_max_amsdu_len)) 699 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 700 dbg_max_amsdu_len); 701 702 /* 703 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 704 * supported. This is a spec requirement (IEEE 802.11-2015 705 * section 8.7.3 NOTE 3). 706 */ 707 if (info->flags & IEEE80211_TX_CTL_AMPDU && 708 !sta->vht_cap.vht_supported) 709 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 710 711 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 712 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 713 pad = (4 - subf_len) & 0x3; 714 715 /* 716 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 717 * N * subf_len + (N - 1) * pad. 718 */ 719 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 720 if (num_subframes > 1) 721 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 722 723 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 724 tcp_hdrlen(skb) + skb->data_len; 725 726 /* 727 * Make sure we have enough TBs for the A-MSDU: 728 * 2 for each subframe 729 * 1 more for each fragment 730 * 1 more for the potential data in the header 731 */ 732 num_subframes = 733 min_t(unsigned int, num_subframes, 734 (mvm->trans->max_skb_frags - 1 - 735 skb_shinfo(skb)->nr_frags) / 2); 736 737 /* This skb fits in one single A-MSDU */ 738 if (num_subframes * mss >= tcp_payload_len) { 739 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 740 741 /* 742 * Compute the length of all the data added for the A-MSDU. 743 * This will be used to compute the length to write in the TX 744 * command. We have: SNAP + IP + TCP for n -1 subframes and 745 * ETH header for n subframes. Note that the original skb 746 * already had one set of SNAP / IP / TCP headers. 747 */ 748 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss); 749 amsdu_add = num_subframes * sizeof(struct ethhdr) + 750 (num_subframes - 1) * (snap_ip_tcp + pad); 751 /* This holds the amsdu headers length */ 752 skb_info->driver_data[0] = (void *)(uintptr_t)amsdu_add; 753 754 __skb_queue_tail(mpdus_skb, skb); 755 return 0; 756 } 757 758 /* 759 * Trick the segmentation function to make it 760 * create SKBs that can fit into one A-MSDU. 761 */ 762 segment: 763 skb_shinfo(skb)->gso_size = num_subframes * mss; 764 memcpy(cb, skb->cb, sizeof(cb)); 765 766 next = skb_gso_segment(skb, netdev_features); 767 skb_shinfo(skb)->gso_size = mss; 768 if (WARN_ON_ONCE(IS_ERR(next))) 769 return -EINVAL; 770 else if (next) 771 consume_skb(skb); 772 773 while (next) { 774 tmp = next; 775 next = tmp->next; 776 777 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 778 /* 779 * Compute the length of all the data added for the A-MSDU. 780 * This will be used to compute the length to write in the TX 781 * command. We have: SNAP + IP + TCP for n -1 subframes and 782 * ETH header for n subframes. 783 */ 784 tcp_payload_len = skb_tail_pointer(tmp) - 785 skb_transport_header(tmp) - 786 tcp_hdrlen(tmp) + tmp->data_len; 787 788 if (ipv4) 789 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 790 791 if (tcp_payload_len > mss) { 792 struct ieee80211_tx_info *skb_info = 793 IEEE80211_SKB_CB(tmp); 794 795 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss); 796 amsdu_add = num_subframes * sizeof(struct ethhdr) + 797 (num_subframes - 1) * (snap_ip_tcp + pad); 798 skb_info->driver_data[0] = 799 (void *)(uintptr_t)amsdu_add; 800 skb_shinfo(tmp)->gso_size = mss; 801 } else { 802 qc = ieee80211_get_qos_ctl((void *)tmp->data); 803 804 if (ipv4) 805 ip_send_check(ip_hdr(tmp)); 806 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 807 skb_shinfo(tmp)->gso_size = 0; 808 } 809 810 tmp->prev = NULL; 811 tmp->next = NULL; 812 813 __skb_queue_tail(mpdus_skb, tmp); 814 i++; 815 } 816 817 return 0; 818 } 819 #else /* CONFIG_INET */ 820 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 821 struct ieee80211_tx_info *info, 822 struct ieee80211_sta *sta, 823 struct sk_buff_head *mpdus_skb) 824 { 825 /* Impossible to get TSO with CONFIG_INET */ 826 WARN_ON(1); 827 828 return -1; 829 } 830 #endif 831 832 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, 833 struct iwl_mvm_sta *mvm_sta, u8 tid, 834 struct sk_buff *skb) 835 { 836 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 837 u8 mac_queue = info->hw_queue; 838 struct sk_buff_head *deferred_tx_frames; 839 840 lockdep_assert_held(&mvm_sta->lock); 841 842 mvm_sta->deferred_traffic_tid_map |= BIT(tid); 843 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); 844 845 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; 846 847 skb_queue_tail(deferred_tx_frames, skb); 848 849 /* 850 * The first deferred frame should've stopped the MAC queues, so we 851 * should never get a second deferred frame for the RA/TID. 852 */ 853 if (!WARN(skb_queue_len(deferred_tx_frames) != 1, 854 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid, 855 skb_queue_len(deferred_tx_frames))) { 856 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); 857 schedule_work(&mvm->add_stream_wk); 858 } 859 } 860 861 /* Check if there are any timed-out TIDs on a given shared TXQ */ 862 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 863 { 864 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 865 unsigned long now = jiffies; 866 int tid; 867 868 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 869 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 870 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 871 return true; 872 } 873 874 return false; 875 } 876 877 /* 878 * Sets the fields in the Tx cmd that are crypto related 879 */ 880 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 881 struct ieee80211_tx_info *info, 882 struct ieee80211_sta *sta) 883 { 884 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 885 struct iwl_mvm_sta *mvmsta; 886 struct iwl_device_cmd *dev_cmd; 887 struct iwl_tx_cmd *tx_cmd; 888 __le16 fc; 889 u16 seq_number = 0; 890 u8 tid = IWL_MAX_TID_COUNT; 891 u8 txq_id = info->hw_queue; 892 bool is_ampdu = false; 893 int hdrlen; 894 895 mvmsta = iwl_mvm_sta_from_mac80211(sta); 896 fc = hdr->frame_control; 897 hdrlen = ieee80211_hdrlen(fc); 898 899 if (WARN_ON_ONCE(!mvmsta)) 900 return -1; 901 902 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) 903 return -1; 904 905 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 906 sta, mvmsta->sta_id); 907 if (!dev_cmd) 908 goto drop; 909 910 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 911 /* From now on, we cannot access info->control */ 912 913 /* 914 * we handle that entirely ourselves -- for uAPSD the firmware 915 * will always send a notification, and for PS-Poll responses 916 * we'll notify mac80211 when getting frame status 917 */ 918 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 919 920 spin_lock(&mvmsta->lock); 921 922 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 923 u8 *qc = NULL; 924 qc = ieee80211_get_qos_ctl(hdr); 925 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 926 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 927 goto drop_unlock_sta; 928 929 seq_number = mvmsta->tid_data[tid].seq_number; 930 seq_number &= IEEE80211_SCTL_SEQ; 931 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 932 hdr->seq_ctrl |= cpu_to_le16(seq_number); 933 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 934 } else if (iwl_mvm_is_dqa_supported(mvm) && 935 (ieee80211_is_qos_nullfunc(fc) || 936 ieee80211_is_nullfunc(fc))) { 937 /* 938 * nullfunc frames should go to the MGMT queue regardless of QOS 939 */ 940 tid = IWL_MAX_TID_COUNT; 941 } 942 943 if (iwl_mvm_is_dqa_supported(mvm)) { 944 txq_id = mvmsta->tid_data[tid].txq_id; 945 946 if (ieee80211_is_mgmt(fc)) 947 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 948 } 949 950 /* Copy MAC header from skb into command buffer */ 951 memcpy(tx_cmd->hdr, hdr, hdrlen); 952 953 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 954 955 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) { 956 /* default to TID 0 for non-QoS packets */ 957 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; 958 959 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; 960 } 961 962 if (is_ampdu) { 963 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON)) 964 goto drop_unlock_sta; 965 txq_id = mvmsta->tid_data[tid].txq_id; 966 } 967 968 /* Check if TXQ needs to be allocated or re-activated */ 969 if (unlikely(txq_id == IEEE80211_INVAL_HW_QUEUE || 970 !mvmsta->tid_data[tid].is_tid_active) && 971 iwl_mvm_is_dqa_supported(mvm)) { 972 /* If TXQ needs to be allocated... */ 973 if (txq_id == IEEE80211_INVAL_HW_QUEUE) { 974 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); 975 976 /* 977 * The frame is now deferred, and the worker scheduled 978 * will re-allocate it, so we can free it for now. 979 */ 980 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 981 spin_unlock(&mvmsta->lock); 982 return 0; 983 } 984 985 /* If we are here - TXQ exists and needs to be re-activated */ 986 spin_lock(&mvm->queue_info_lock); 987 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 988 mvmsta->tid_data[tid].is_tid_active = true; 989 spin_unlock(&mvm->queue_info_lock); 990 991 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n", 992 txq_id); 993 } 994 995 if (iwl_mvm_is_dqa_supported(mvm)) { 996 /* Keep track of the time of the last frame for this RA/TID */ 997 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 998 999 /* 1000 * If we have timed-out TIDs - schedule the worker that will 1001 * reconfig the queues and update them 1002 * 1003 * Note that the mvm->queue_info_lock isn't being taken here in 1004 * order to not serialize the TX flow. This isn't dangerous 1005 * because scheduling mvm->add_stream_wk can't ruin the state, 1006 * and if we DON'T schedule it due to some race condition then 1007 * next TX we get here we will. 1008 */ 1009 if (unlikely(mvm->queue_info[txq_id].status == 1010 IWL_MVM_QUEUE_SHARED && 1011 iwl_mvm_txq_should_update(mvm, txq_id))) 1012 schedule_work(&mvm->add_stream_wk); 1013 } 1014 1015 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 1016 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 1017 1018 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1019 goto drop_unlock_sta; 1020 1021 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1022 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1023 1024 spin_unlock(&mvmsta->lock); 1025 1026 /* Increase pending frames count if this isn't AMPDU */ 1027 if (!is_ampdu) 1028 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); 1029 1030 return 0; 1031 1032 drop_unlock_sta: 1033 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1034 spin_unlock(&mvmsta->lock); 1035 drop: 1036 return -1; 1037 } 1038 1039 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 1040 struct ieee80211_sta *sta) 1041 { 1042 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1043 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 1044 struct ieee80211_tx_info info; 1045 struct sk_buff_head mpdus_skbs; 1046 unsigned int payload_len; 1047 int ret; 1048 1049 if (WARN_ON_ONCE(!mvmsta)) 1050 return -1; 1051 1052 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) 1053 return -1; 1054 1055 memcpy(&info, skb->cb, sizeof(info)); 1056 1057 /* This holds the amsdu headers length */ 1058 skb_info->driver_data[0] = (void *)(uintptr_t)0; 1059 1060 if (!skb_is_gso(skb)) 1061 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1062 1063 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1064 tcp_hdrlen(skb) + skb->data_len; 1065 1066 if (payload_len <= skb_shinfo(skb)->gso_size) 1067 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1068 1069 __skb_queue_head_init(&mpdus_skbs); 1070 1071 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1072 if (ret) 1073 return ret; 1074 1075 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1076 return ret; 1077 1078 while (!skb_queue_empty(&mpdus_skbs)) { 1079 skb = __skb_dequeue(&mpdus_skbs); 1080 1081 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1082 if (ret) { 1083 __skb_queue_purge(&mpdus_skbs); 1084 return ret; 1085 } 1086 } 1087 1088 return 0; 1089 } 1090 1091 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1092 struct ieee80211_sta *sta, u8 tid) 1093 { 1094 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1095 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1096 struct ieee80211_vif *vif = mvmsta->vif; 1097 1098 lockdep_assert_held(&mvmsta->lock); 1099 1100 if ((tid_data->state == IWL_AGG_ON || 1101 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1102 iwl_mvm_tid_queued(tid_data) == 0) { 1103 /* 1104 * Now that this aggregation queue is empty tell mac80211 so it 1105 * knows we no longer have frames buffered for the station on 1106 * this TID (for the TIM bitmap calculation.) 1107 */ 1108 ieee80211_sta_set_buffered(sta, tid, false); 1109 } 1110 1111 if (tid_data->ssn != tid_data->next_reclaimed) 1112 return; 1113 1114 switch (tid_data->state) { 1115 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1116 IWL_DEBUG_TX_QUEUES(mvm, 1117 "Can continue addBA flow ssn = next_recl = %d\n", 1118 tid_data->next_reclaimed); 1119 tid_data->state = IWL_AGG_STARTING; 1120 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1121 break; 1122 1123 case IWL_EMPTYING_HW_QUEUE_DELBA: 1124 IWL_DEBUG_TX_QUEUES(mvm, 1125 "Can continue DELBA flow ssn = next_recl = %d\n", 1126 tid_data->next_reclaimed); 1127 if (!iwl_mvm_is_dqa_supported(mvm)) { 1128 u8 mac80211_ac = tid_to_mac80211_ac[tid]; 1129 1130 iwl_mvm_disable_txq(mvm, tid_data->txq_id, 1131 vif->hw_queue[mac80211_ac], tid, 1132 CMD_ASYNC); 1133 } 1134 tid_data->state = IWL_AGG_OFF; 1135 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1136 break; 1137 1138 default: 1139 break; 1140 } 1141 } 1142 1143 #ifdef CONFIG_IWLWIFI_DEBUG 1144 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1145 { 1146 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1147 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1148 1149 switch (status & TX_STATUS_MSK) { 1150 case TX_STATUS_SUCCESS: 1151 return "SUCCESS"; 1152 TX_STATUS_POSTPONE(DELAY); 1153 TX_STATUS_POSTPONE(FEW_BYTES); 1154 TX_STATUS_POSTPONE(BT_PRIO); 1155 TX_STATUS_POSTPONE(QUIET_PERIOD); 1156 TX_STATUS_POSTPONE(CALC_TTAK); 1157 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1158 TX_STATUS_FAIL(SHORT_LIMIT); 1159 TX_STATUS_FAIL(LONG_LIMIT); 1160 TX_STATUS_FAIL(UNDERRUN); 1161 TX_STATUS_FAIL(DRAIN_FLOW); 1162 TX_STATUS_FAIL(RFKILL_FLUSH); 1163 TX_STATUS_FAIL(LIFE_EXPIRE); 1164 TX_STATUS_FAIL(DEST_PS); 1165 TX_STATUS_FAIL(HOST_ABORTED); 1166 TX_STATUS_FAIL(BT_RETRY); 1167 TX_STATUS_FAIL(STA_INVALID); 1168 TX_STATUS_FAIL(FRAG_DROPPED); 1169 TX_STATUS_FAIL(TID_DISABLE); 1170 TX_STATUS_FAIL(FIFO_FLUSHED); 1171 TX_STATUS_FAIL(SMALL_CF_POLL); 1172 TX_STATUS_FAIL(FW_DROP); 1173 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1174 } 1175 1176 return "UNKNOWN"; 1177 1178 #undef TX_STATUS_FAIL 1179 #undef TX_STATUS_POSTPONE 1180 } 1181 #endif /* CONFIG_IWLWIFI_DEBUG */ 1182 1183 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1184 enum nl80211_band band, 1185 struct ieee80211_tx_rate *r) 1186 { 1187 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1188 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1189 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1190 case RATE_MCS_CHAN_WIDTH_20: 1191 break; 1192 case RATE_MCS_CHAN_WIDTH_40: 1193 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1194 break; 1195 case RATE_MCS_CHAN_WIDTH_80: 1196 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1197 break; 1198 case RATE_MCS_CHAN_WIDTH_160: 1199 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1200 break; 1201 } 1202 if (rate_n_flags & RATE_MCS_SGI_MSK) 1203 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1204 if (rate_n_flags & RATE_MCS_HT_MSK) { 1205 r->flags |= IEEE80211_TX_RC_MCS; 1206 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1207 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1208 ieee80211_rate_set_vht( 1209 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1210 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1211 RATE_VHT_MCS_NSS_POS) + 1); 1212 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1213 } else { 1214 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1215 band); 1216 } 1217 } 1218 1219 /** 1220 * translate ucode response to mac80211 tx status control values 1221 */ 1222 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1223 struct ieee80211_tx_info *info) 1224 { 1225 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1226 1227 info->status.antenna = 1228 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1229 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1230 } 1231 1232 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1233 u32 status) 1234 { 1235 struct iwl_fw_dbg_trigger_tlv *trig; 1236 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1237 int i; 1238 1239 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) 1240 return; 1241 1242 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); 1243 status_trig = (void *)trig->data; 1244 1245 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) 1246 return; 1247 1248 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1249 /* don't collect on status 0 */ 1250 if (!status_trig->statuses[i].status) 1251 break; 1252 1253 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1254 continue; 1255 1256 iwl_mvm_fw_dbg_collect_trig(mvm, trig, 1257 "Tx status %d was received", 1258 status & TX_STATUS_MSK); 1259 break; 1260 } 1261 } 1262 1263 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1264 struct iwl_rx_packet *pkt) 1265 { 1266 struct ieee80211_sta *sta; 1267 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1268 int txq_id = SEQ_TO_QUEUE(sequence); 1269 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1270 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1271 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1272 u32 status = le16_to_cpu(tx_resp->status.status); 1273 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); 1274 struct iwl_mvm_sta *mvmsta; 1275 struct sk_buff_head skbs; 1276 u8 skb_freed = 0; 1277 u16 next_reclaimed, seq_ctl; 1278 bool is_ndp = false; 1279 bool txq_agg = false; /* Is this TXQ aggregated */ 1280 1281 __skb_queue_head_init(&skbs); 1282 1283 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1284 1285 /* we can free until ssn % q.n_bd not inclusive */ 1286 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1287 1288 while (!skb_queue_empty(&skbs)) { 1289 struct sk_buff *skb = __skb_dequeue(&skbs); 1290 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1291 1292 skb_freed++; 1293 1294 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1295 1296 memset(&info->status, 0, sizeof(info->status)); 1297 1298 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1299 1300 /* inform mac80211 about what happened with the frame */ 1301 switch (status & TX_STATUS_MSK) { 1302 case TX_STATUS_SUCCESS: 1303 case TX_STATUS_DIRECT_DONE: 1304 info->flags |= IEEE80211_TX_STAT_ACK; 1305 break; 1306 case TX_STATUS_FAIL_DEST_PS: 1307 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1308 break; 1309 default: 1310 break; 1311 } 1312 1313 iwl_mvm_tx_status_check_trigger(mvm, status); 1314 1315 info->status.rates[0].count = tx_resp->failure_frame + 1; 1316 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1317 info); 1318 info->status.status_driver_data[1] = 1319 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1320 1321 /* Single frame failure in an AMPDU queue => send BAR */ 1322 if (txq_id >= mvm->first_agg_queue && 1323 !(info->flags & IEEE80211_TX_STAT_ACK) && 1324 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) 1325 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1326 1327 /* W/A FW bug: seq_ctl is wrong when the status isn't success */ 1328 if (status != TX_STATUS_SUCCESS) { 1329 struct ieee80211_hdr *hdr = (void *)skb->data; 1330 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1331 } 1332 1333 if (unlikely(!seq_ctl)) { 1334 struct ieee80211_hdr *hdr = (void *)skb->data; 1335 1336 /* 1337 * If it is an NDP, we can't update next_reclaim since 1338 * its sequence control is 0. Note that for that same 1339 * reason, NDPs are never sent to A-MPDU'able queues 1340 * so that we can never have more than one freed frame 1341 * for a single Tx resonse (see WARN_ON below). 1342 */ 1343 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1344 is_ndp = true; 1345 } 1346 1347 /* 1348 * TODO: this is not accurate if we are freeing more than one 1349 * packet. 1350 */ 1351 info->status.tx_time = 1352 le16_to_cpu(tx_resp->wireless_media_time); 1353 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1354 info->status.status_driver_data[0] = 1355 (void *)(uintptr_t)tx_resp->reduced_tpc; 1356 1357 ieee80211_tx_status(mvm->hw, skb); 1358 } 1359 1360 if (txq_id >= mvm->first_agg_queue) { 1361 /* If this is an aggregation queue, we use the ssn since: 1362 * ssn = wifi seq_num % 256. 1363 * The seq_ctl is the sequence control of the packet to which 1364 * this Tx response relates. But if there is a hole in the 1365 * bitmap of the BA we received, this Tx response may allow to 1366 * reclaim the hole and all the subsequent packets that were 1367 * already acked. In that case, seq_ctl != ssn, and the next 1368 * packet to be reclaimed will be ssn and not seq_ctl. In that 1369 * case, several packets will be reclaimed even if 1370 * frame_count = 1. 1371 * 1372 * The ssn is the index (% 256) of the latest packet that has 1373 * treated (acked / dropped) + 1. 1374 */ 1375 next_reclaimed = ssn; 1376 } else { 1377 /* The next packet to be reclaimed is the one after this one */ 1378 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); 1379 } 1380 1381 IWL_DEBUG_TX_REPLY(mvm, 1382 "TXQ %d status %s (0x%08x)\n", 1383 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1384 1385 IWL_DEBUG_TX_REPLY(mvm, 1386 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1387 le32_to_cpu(tx_resp->initial_rate), 1388 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1389 ssn, next_reclaimed, seq_ctl); 1390 1391 rcu_read_lock(); 1392 1393 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1394 /* 1395 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1396 * the firmware while we still have packets for it in the Tx queues. 1397 */ 1398 if (WARN_ON_ONCE(!sta)) 1399 goto out; 1400 1401 if (!IS_ERR(sta)) { 1402 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1403 1404 if (tid != IWL_TID_NON_QOS) { 1405 struct iwl_mvm_tid_data *tid_data = 1406 &mvmsta->tid_data[tid]; 1407 bool send_eosp_ndp = false; 1408 1409 spin_lock_bh(&mvmsta->lock); 1410 if (iwl_mvm_is_dqa_supported(mvm)) { 1411 enum iwl_mvm_agg_state state; 1412 1413 state = mvmsta->tid_data[tid].state; 1414 txq_agg = (state == IWL_AGG_ON || 1415 state == IWL_EMPTYING_HW_QUEUE_DELBA); 1416 } else { 1417 txq_agg = txq_id >= mvm->first_agg_queue; 1418 } 1419 1420 if (!is_ndp) { 1421 tid_data->next_reclaimed = next_reclaimed; 1422 IWL_DEBUG_TX_REPLY(mvm, 1423 "Next reclaimed packet:%d\n", 1424 next_reclaimed); 1425 } else { 1426 IWL_DEBUG_TX_REPLY(mvm, 1427 "NDP - don't update next_reclaimed\n"); 1428 } 1429 1430 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1431 1432 if (mvmsta->sleep_tx_count) { 1433 mvmsta->sleep_tx_count--; 1434 if (mvmsta->sleep_tx_count && 1435 !iwl_mvm_tid_queued(tid_data)) { 1436 /* 1437 * The number of frames in the queue 1438 * dropped to 0 even if we sent less 1439 * frames than we thought we had on the 1440 * Tx queue. 1441 * This means we had holes in the BA 1442 * window that we just filled, ask 1443 * mac80211 to send EOSP since the 1444 * firmware won't know how to do that. 1445 * Send NDP and the firmware will send 1446 * EOSP notification that will trigger 1447 * a call to ieee80211_sta_eosp(). 1448 */ 1449 send_eosp_ndp = true; 1450 } 1451 } 1452 1453 spin_unlock_bh(&mvmsta->lock); 1454 if (send_eosp_ndp) { 1455 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1456 IEEE80211_FRAME_RELEASE_UAPSD, 1457 1, tid, false, false); 1458 mvmsta->sleep_tx_count = 0; 1459 ieee80211_send_eosp_nullfunc(sta, tid); 1460 } 1461 } 1462 1463 if (mvmsta->next_status_eosp) { 1464 mvmsta->next_status_eosp = false; 1465 ieee80211_sta_eosp(sta); 1466 } 1467 } else { 1468 mvmsta = NULL; 1469 } 1470 1471 /* 1472 * If the txq is not an AMPDU queue, there is no chance we freed 1473 * several skbs. Check that out... 1474 */ 1475 if (txq_agg) 1476 goto out; 1477 1478 /* We can't free more than one frame at once on a shared queue */ 1479 WARN_ON(!iwl_mvm_is_dqa_supported(mvm) && (skb_freed > 1)); 1480 1481 /* If we have still frames for this STA nothing to do here */ 1482 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) 1483 goto out; 1484 1485 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { 1486 1487 /* 1488 * If there are no pending frames for this STA and 1489 * the tx to this station is not disabled, notify 1490 * mac80211 that this station can now wake up in its 1491 * STA table. 1492 * If mvmsta is not NULL, sta is valid. 1493 */ 1494 1495 spin_lock_bh(&mvmsta->lock); 1496 1497 if (!mvmsta->disable_tx) 1498 ieee80211_sta_block_awake(mvm->hw, sta, false); 1499 1500 spin_unlock_bh(&mvmsta->lock); 1501 } 1502 1503 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { 1504 /* 1505 * We are draining and this was the last packet - pre_rcu_remove 1506 * has been called already. We might be after the 1507 * synchronize_net already. 1508 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. 1509 */ 1510 set_bit(sta_id, mvm->sta_drained); 1511 schedule_work(&mvm->sta_drained_wk); 1512 } 1513 1514 out: 1515 rcu_read_unlock(); 1516 } 1517 1518 #ifdef CONFIG_IWLWIFI_DEBUG 1519 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1520 static const char *iwl_get_agg_tx_status(u16 status) 1521 { 1522 switch (status & AGG_TX_STATE_STATUS_MSK) { 1523 AGG_TX_STATE_(TRANSMITTED); 1524 AGG_TX_STATE_(UNDERRUN); 1525 AGG_TX_STATE_(BT_PRIO); 1526 AGG_TX_STATE_(FEW_BYTES); 1527 AGG_TX_STATE_(ABORT); 1528 AGG_TX_STATE_(LAST_SENT_TTL); 1529 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1530 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1531 AGG_TX_STATE_(SCD_QUERY); 1532 AGG_TX_STATE_(TEST_BAD_CRC32); 1533 AGG_TX_STATE_(RESPONSE); 1534 AGG_TX_STATE_(DUMP_TX); 1535 AGG_TX_STATE_(DELAY_TX); 1536 } 1537 1538 return "UNKNOWN"; 1539 } 1540 1541 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1542 struct iwl_rx_packet *pkt) 1543 { 1544 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1545 struct agg_tx_status *frame_status = &tx_resp->status; 1546 int i; 1547 1548 for (i = 0; i < tx_resp->frame_count; i++) { 1549 u16 fstatus = le16_to_cpu(frame_status[i].status); 1550 1551 IWL_DEBUG_TX_REPLY(mvm, 1552 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1553 iwl_get_agg_tx_status(fstatus), 1554 fstatus & AGG_TX_STATE_STATUS_MSK, 1555 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1556 AGG_TX_STATE_TRY_CNT_POS, 1557 le16_to_cpu(frame_status[i].sequence)); 1558 } 1559 } 1560 #else 1561 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1562 struct iwl_rx_packet *pkt) 1563 {} 1564 #endif /* CONFIG_IWLWIFI_DEBUG */ 1565 1566 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1567 struct iwl_rx_packet *pkt) 1568 { 1569 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1570 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1571 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1572 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1573 struct iwl_mvm_sta *mvmsta; 1574 int queue = SEQ_TO_QUEUE(sequence); 1575 1576 if (WARN_ON_ONCE(queue < mvm->first_agg_queue && 1577 (!iwl_mvm_is_dqa_supported(mvm) || 1578 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))) 1579 return; 1580 1581 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) 1582 return; 1583 1584 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1585 1586 rcu_read_lock(); 1587 1588 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1589 1590 if (!WARN_ON_ONCE(!mvmsta)) { 1591 mvmsta->tid_data[tid].rate_n_flags = 1592 le32_to_cpu(tx_resp->initial_rate); 1593 mvmsta->tid_data[tid].tx_time = 1594 le16_to_cpu(tx_resp->wireless_media_time); 1595 } 1596 1597 rcu_read_unlock(); 1598 } 1599 1600 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1601 { 1602 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1603 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1604 1605 if (tx_resp->frame_count == 1) 1606 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1607 else 1608 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1609 } 1610 1611 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1612 int txq, int index, 1613 struct ieee80211_tx_info *ba_info, u32 rate) 1614 { 1615 struct sk_buff_head reclaimed_skbs; 1616 struct iwl_mvm_tid_data *tid_data; 1617 struct ieee80211_sta *sta; 1618 struct iwl_mvm_sta *mvmsta; 1619 struct sk_buff *skb; 1620 int freed; 1621 1622 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1623 tid >= IWL_MAX_TID_COUNT, 1624 "sta_id %d tid %d", sta_id, tid)) 1625 return; 1626 1627 rcu_read_lock(); 1628 1629 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1630 1631 /* Reclaiming frames for a station that has been deleted ? */ 1632 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1633 rcu_read_unlock(); 1634 return; 1635 } 1636 1637 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1638 tid_data = &mvmsta->tid_data[tid]; 1639 1640 if (tid_data->txq_id != txq) { 1641 IWL_ERR(mvm, 1642 "invalid BA notification: Q %d, tid %d\n", 1643 tid_data->txq_id, tid); 1644 rcu_read_unlock(); 1645 return; 1646 } 1647 1648 spin_lock_bh(&mvmsta->lock); 1649 1650 __skb_queue_head_init(&reclaimed_skbs); 1651 1652 /* 1653 * Release all TFDs before the SSN, i.e. all TFDs in front of 1654 * block-ack window (we assume that they've been successfully 1655 * transmitted ... if not, it's too late anyway). 1656 */ 1657 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1658 1659 tid_data->next_reclaimed = index; 1660 1661 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1662 1663 freed = 0; 1664 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1665 1666 skb_queue_walk(&reclaimed_skbs, skb) { 1667 struct ieee80211_hdr *hdr = (void *)skb->data; 1668 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1669 1670 if (ieee80211_is_data_qos(hdr->frame_control)) 1671 freed++; 1672 else 1673 WARN_ON_ONCE(1); 1674 1675 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1676 1677 memset(&info->status, 0, sizeof(info->status)); 1678 /* Packet was transmitted successfully, failures come as single 1679 * frames because before failing a frame the firmware transmits 1680 * it without aggregation at least once. 1681 */ 1682 info->flags |= IEEE80211_TX_STAT_ACK; 1683 1684 /* this is the first skb we deliver in this batch */ 1685 /* put the rate scaling data there */ 1686 if (freed == 1) { 1687 info->flags |= IEEE80211_TX_STAT_AMPDU; 1688 memcpy(&info->status, &ba_info->status, 1689 sizeof(ba_info->status)); 1690 iwl_mvm_hwrate_to_tx_status(rate, info); 1691 } 1692 } 1693 1694 spin_unlock_bh(&mvmsta->lock); 1695 1696 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1697 * possible (i.e. first MPDU in the aggregation wasn't acked) 1698 * Still it's important to update RS about sent vs. acked. 1699 */ 1700 if (skb_queue_empty(&reclaimed_skbs)) { 1701 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1702 1703 if (mvmsta->vif) 1704 chanctx_conf = 1705 rcu_dereference(mvmsta->vif->chanctx_conf); 1706 1707 if (WARN_ON_ONCE(!chanctx_conf)) 1708 goto out; 1709 1710 ba_info->band = chanctx_conf->def.chan->band; 1711 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1712 1713 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 1714 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1715 } 1716 1717 out: 1718 rcu_read_unlock(); 1719 1720 while (!skb_queue_empty(&reclaimed_skbs)) { 1721 skb = __skb_dequeue(&reclaimed_skbs); 1722 ieee80211_tx_status(mvm->hw, skb); 1723 } 1724 } 1725 1726 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1727 { 1728 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1729 int sta_id, tid, txq, index; 1730 struct ieee80211_tx_info ba_info = {}; 1731 struct iwl_mvm_ba_notif *ba_notif; 1732 struct iwl_mvm_tid_data *tid_data; 1733 struct iwl_mvm_sta *mvmsta; 1734 1735 if (iwl_mvm_has_new_tx_api(mvm)) { 1736 struct iwl_mvm_compressed_ba_notif *ba_res = 1737 (void *)pkt->data; 1738 1739 sta_id = ba_res->sta_id; 1740 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1741 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1742 ba_info.status.tx_time = 1743 (u16)le32_to_cpu(ba_res->wireless_time); 1744 ba_info.status.status_driver_data[0] = 1745 (void *)(uintptr_t)ba_res->reduced_txp; 1746 1747 /* 1748 * TODO: 1749 * When supporting multi TID aggregations - we need to move 1750 * next_reclaimed to be per TXQ and not per TID or handle it 1751 * in a different way. 1752 * This will go together with SN and AddBA offload and cannot 1753 * be handled properly for now. 1754 */ 1755 WARN_ON(le16_to_cpu(ba_res->tfd_cnt) != 1); 1756 iwl_mvm_tx_reclaim(mvm, sta_id, ba_res->ra_tid[0].tid, 1757 (int)ba_res->tfd[0].q_num, 1758 le16_to_cpu(ba_res->tfd[0].tfd_index), 1759 &ba_info, le32_to_cpu(ba_res->tx_rate)); 1760 1761 IWL_DEBUG_TX_REPLY(mvm, 1762 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1763 sta_id, le32_to_cpu(ba_res->flags), 1764 le16_to_cpu(ba_res->txed), 1765 le16_to_cpu(ba_res->done)); 1766 return; 1767 } 1768 1769 ba_notif = (void *)pkt->data; 1770 sta_id = ba_notif->sta_id; 1771 tid = ba_notif->tid; 1772 /* "flow" corresponds to Tx queue */ 1773 txq = le16_to_cpu(ba_notif->scd_flow); 1774 /* "ssn" is start of block-ack Tx window, corresponds to index 1775 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1776 index = le16_to_cpu(ba_notif->scd_ssn); 1777 1778 rcu_read_lock(); 1779 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1780 if (WARN_ON_ONCE(!mvmsta)) { 1781 rcu_read_unlock(); 1782 return; 1783 } 1784 1785 tid_data = &mvmsta->tid_data[tid]; 1786 1787 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1788 ba_info.status.ampdu_len = ba_notif->txed; 1789 ba_info.status.tx_time = tid_data->tx_time; 1790 ba_info.status.status_driver_data[0] = 1791 (void *)(uintptr_t)ba_notif->reduced_txp; 1792 1793 rcu_read_unlock(); 1794 1795 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1796 tid_data->rate_n_flags); 1797 1798 IWL_DEBUG_TX_REPLY(mvm, 1799 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1800 (u8 *)&ba_notif->sta_addr_lo32, ba_notif->sta_id); 1801 1802 IWL_DEBUG_TX_REPLY(mvm, 1803 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1804 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1805 le64_to_cpu(ba_notif->bitmap), txq, index, 1806 ba_notif->txed, ba_notif->txed_2_done); 1807 1808 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1809 ba_notif->reduced_txp); 1810 } 1811 1812 /* 1813 * Note that there are transports that buffer frames before they reach 1814 * the firmware. This means that after flush_tx_path is called, the 1815 * queue might not be empty. The race-free way to handle this is to: 1816 * 1) set the station as draining 1817 * 2) flush the Tx path 1818 * 3) wait for the transport queues to be empty 1819 */ 1820 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 1821 { 1822 int ret; 1823 struct iwl_tx_path_flush_cmd flush_cmd = { 1824 .queues_ctl = cpu_to_le32(tfd_msk), 1825 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 1826 }; 1827 1828 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1829 sizeof(flush_cmd), &flush_cmd); 1830 if (ret) 1831 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1832 return ret; 1833 } 1834