1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 #include <linux/ieee80211.h> 68 #include <linux/etherdevice.h> 69 #include <linux/tcp.h> 70 #include <net/ip.h> 71 #include <net/ipv6.h> 72 73 #include "iwl-trans.h" 74 #include "iwl-eeprom-parse.h" 75 #include "mvm.h" 76 #include "sta.h" 77 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->fwrt, NULL, trig)) 92 return; 93 94 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 95 return; 96 97 iwl_fw_dbg_collect_trig(&mvm->fwrt, 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 u16 offload_assist) 109 { 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 /* 188 * mac header len should include IV, size is in words unless 189 * the IV is added by the firmware like in WEP. 190 * In new Tx API, the IV is always added by the firmware. 191 */ 192 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 193 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 194 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 195 mh_len += info->control.hw_key->iv_len; 196 mh_len /= 2; 197 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 198 199 out: 200 #endif 201 return offload_assist; 202 } 203 204 /* 205 * Sets most of the Tx cmd's fields 206 */ 207 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 208 struct iwl_tx_cmd *tx_cmd, 209 struct ieee80211_tx_info *info, u8 sta_id) 210 { 211 struct ieee80211_hdr *hdr = (void *)skb->data; 212 __le16 fc = hdr->frame_control; 213 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 214 u32 len = skb->len + FCS_LEN; 215 u16 offload_assist = 0; 216 u8 ac; 217 218 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 219 tx_flags |= TX_CMD_FLG_ACK; 220 else 221 tx_flags &= ~TX_CMD_FLG_ACK; 222 223 if (ieee80211_is_probe_resp(fc)) 224 tx_flags |= TX_CMD_FLG_TSF; 225 226 if (ieee80211_has_morefrags(fc)) 227 tx_flags |= TX_CMD_FLG_MORE_FRAG; 228 229 if (ieee80211_is_data_qos(fc)) { 230 u8 *qc = ieee80211_get_qos_ctl(hdr); 231 tx_cmd->tid_tspec = qc[0] & 0xf; 232 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 233 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 234 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 235 } else if (ieee80211_is_back_req(fc)) { 236 struct ieee80211_bar *bar = (void *)skb->data; 237 u16 control = le16_to_cpu(bar->control); 238 u16 ssn = le16_to_cpu(bar->start_seq_num); 239 240 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 241 tx_cmd->tid_tspec = (control & 242 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 243 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 244 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 245 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 246 ssn); 247 } else { 248 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 249 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 250 tx_flags |= TX_CMD_FLG_SEQ_CTL; 251 else 252 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 253 } 254 255 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */ 256 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 257 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 258 else 259 ac = tid_to_mac80211_ac[0]; 260 261 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 262 TX_CMD_FLG_BT_PRIO_POS; 263 264 if (ieee80211_is_mgmt(fc)) { 265 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 266 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 267 else if (ieee80211_is_action(fc)) 268 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 269 else 270 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 271 272 /* The spec allows Action frames in A-MPDU, we don't support 273 * it 274 */ 275 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 276 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 277 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 278 } else { 279 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 280 } 281 282 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 283 !is_multicast_ether_addr(ieee80211_get_DA(hdr))) 284 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 285 286 if (fw_has_capa(&mvm->fw->ucode_capa, 287 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 288 ieee80211_action_contains_tpc(skb)) 289 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 290 291 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 292 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 293 tx_cmd->len = cpu_to_le16((u16)skb->len); 294 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 295 tx_cmd->sta_id = sta_id; 296 297 /* padding is inserted later in transport */ 298 if (ieee80211_hdrlen(fc) % 4 && 299 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 300 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 301 302 tx_cmd->offload_assist |= 303 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info, 304 offload_assist)); 305 } 306 307 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 308 struct ieee80211_tx_info *info, 309 struct ieee80211_sta *sta) 310 { 311 int rate_idx; 312 u8 rate_plcp; 313 u32 rate_flags; 314 315 /* HT rate doesn't make sense for a non data frame */ 316 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, 317 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n", 318 info->control.rates[0].flags, 319 info->control.rates[0].idx); 320 321 rate_idx = info->control.rates[0].idx; 322 /* if the rate isn't a well known legacy rate, take the lowest one */ 323 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 324 rate_idx = rate_lowest_index( 325 &mvm->nvm_data->bands[info->band], sta); 326 327 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 328 if (info->band == NL80211_BAND_5GHZ) 329 rate_idx += IWL_FIRST_OFDM_RATE; 330 331 /* For 2.4 GHZ band, check that there is no need to remap */ 332 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 333 334 /* Get PLCP rate for tx_cmd->rate_n_flags */ 335 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 336 337 if (info->band == NL80211_BAND_2GHZ && 338 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 339 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 340 else 341 rate_flags = 342 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 343 344 /* Set CCK flag as needed */ 345 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 346 rate_flags |= RATE_MCS_CCK_MSK; 347 348 return (u32)rate_plcp | rate_flags; 349 } 350 351 /* 352 * Sets the fields in the Tx cmd that are rate related 353 */ 354 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 355 struct ieee80211_tx_info *info, 356 struct ieee80211_sta *sta, __le16 fc) 357 { 358 /* Set retry limit on RTS packets */ 359 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 360 361 /* Set retry limit on DATA packets and Probe Responses*/ 362 if (ieee80211_is_probe_resp(fc)) { 363 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 364 tx_cmd->rts_retry_limit = 365 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 366 } else if (ieee80211_is_back_req(fc)) { 367 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 368 } else { 369 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 370 } 371 372 /* 373 * for data packets, rate info comes from the table inside the fw. This 374 * table is controlled by LINK_QUALITY commands 375 */ 376 377 if (ieee80211_is_data(fc) && sta) { 378 tx_cmd->initial_rate_index = 0; 379 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 380 return; 381 } else if (ieee80211_is_back_req(fc)) { 382 tx_cmd->tx_flags |= 383 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 384 } 385 386 mvm->mgmt_last_antenna_idx = 387 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 388 mvm->mgmt_last_antenna_idx); 389 390 /* Set the rate in the TX cmd */ 391 tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 392 } 393 394 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 395 u8 *crypto_hdr) 396 { 397 struct ieee80211_key_conf *keyconf = info->control.hw_key; 398 u64 pn; 399 400 pn = atomic64_inc_return(&keyconf->tx_pn); 401 crypto_hdr[0] = pn; 402 crypto_hdr[2] = 0; 403 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 404 crypto_hdr[1] = pn >> 8; 405 crypto_hdr[4] = pn >> 16; 406 crypto_hdr[5] = pn >> 24; 407 crypto_hdr[6] = pn >> 32; 408 crypto_hdr[7] = pn >> 40; 409 } 410 411 /* 412 * Sets the fields in the Tx cmd that are crypto related 413 */ 414 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 415 struct ieee80211_tx_info *info, 416 struct iwl_tx_cmd *tx_cmd, 417 struct sk_buff *skb_frag, 418 int hdrlen) 419 { 420 struct ieee80211_key_conf *keyconf = info->control.hw_key; 421 u8 *crypto_hdr = skb_frag->data + hdrlen; 422 u64 pn; 423 424 switch (keyconf->cipher) { 425 case WLAN_CIPHER_SUITE_CCMP: 426 case WLAN_CIPHER_SUITE_CCMP_256: 427 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 428 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 429 break; 430 431 case WLAN_CIPHER_SUITE_TKIP: 432 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 433 pn = atomic64_inc_return(&keyconf->tx_pn); 434 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 435 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 436 break; 437 438 case WLAN_CIPHER_SUITE_WEP104: 439 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 440 /* fall through */ 441 case WLAN_CIPHER_SUITE_WEP40: 442 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 443 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 444 TX_CMD_SEC_WEP_KEY_IDX_MSK); 445 446 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 447 break; 448 case WLAN_CIPHER_SUITE_GCMP: 449 case WLAN_CIPHER_SUITE_GCMP_256: 450 /* TODO: Taking the key from the table might introduce a race 451 * when PTK rekeying is done, having an old packets with a PN 452 * based on the old key but the message encrypted with a new 453 * one. 454 * Need to handle this. 455 */ 456 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE; 457 tx_cmd->key[0] = keyconf->hw_key_idx; 458 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 459 break; 460 default: 461 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 462 } 463 } 464 465 /* 466 * Allocates and sets the Tx cmd the driver data pointers in the skb 467 */ 468 static struct iwl_device_cmd * 469 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 470 struct ieee80211_tx_info *info, int hdrlen, 471 struct ieee80211_sta *sta, u8 sta_id) 472 { 473 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 474 struct iwl_device_cmd *dev_cmd; 475 struct iwl_tx_cmd *tx_cmd; 476 477 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 478 479 if (unlikely(!dev_cmd)) 480 return NULL; 481 482 /* Make sure we zero enough of dev_cmd */ 483 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd)); 484 485 memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd)); 486 dev_cmd->hdr.cmd = TX_CMD; 487 488 if (iwl_mvm_has_new_tx_api(mvm)) { 489 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 490 u16 offload_assist = 0; 491 492 if (ieee80211_is_data_qos(hdr->frame_control)) { 493 u8 *qc = ieee80211_get_qos_ctl(hdr); 494 495 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 496 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 497 } 498 499 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, 500 offload_assist); 501 502 /* padding is inserted later in transport */ 503 if (ieee80211_hdrlen(hdr->frame_control) % 4 && 504 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 505 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 506 507 cmd->offload_assist |= cpu_to_le16(offload_assist); 508 509 /* Total # bytes to be transmitted */ 510 cmd->len = cpu_to_le16((u16)skb->len); 511 512 /* Copy MAC header from skb into command buffer */ 513 memcpy(cmd->hdr, hdr, hdrlen); 514 515 if (!info->control.hw_key) 516 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS); 517 518 /* For data packets rate info comes from the fw */ 519 if (ieee80211_is_data(hdr->frame_control) && sta) 520 goto out; 521 522 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE); 523 cmd->rate_n_flags = 524 cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 525 526 goto out; 527 } 528 529 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 530 531 if (info->control.hw_key) 532 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 533 534 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 535 536 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 537 538 /* Copy MAC header from skb into command buffer */ 539 memcpy(tx_cmd->hdr, hdr, hdrlen); 540 541 out: 542 return dev_cmd; 543 } 544 545 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 546 struct iwl_device_cmd *cmd) 547 { 548 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 549 550 memset(&skb_info->status, 0, sizeof(skb_info->status)); 551 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 552 553 skb_info->driver_data[1] = cmd; 554 } 555 556 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 557 struct ieee80211_tx_info *info, __le16 fc) 558 { 559 struct iwl_mvm_vif *mvmvif; 560 561 mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif); 562 563 switch (info->control.vif->type) { 564 case NL80211_IFTYPE_AP: 565 case NL80211_IFTYPE_ADHOC: 566 /* 567 * Non-bufferable frames use the broadcast station, thus they 568 * use the probe queue. 569 * Also take care of the case where we send a deauth to a 570 * station that we don't have, or similarly an association 571 * response (with non-success status) for a station we can't 572 * accept. 573 * Also, disassociate frames might happen, particular with 574 * reason 7 ("Class 3 frame received from nonassociated STA"). 575 */ 576 if (ieee80211_is_mgmt(fc) && 577 (!ieee80211_is_bufferable_mmpdu(fc) || 578 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 579 return mvm->probe_queue; 580 if (info->hw_queue == info->control.vif->cab_queue) 581 return mvmvif->cab_queue; 582 583 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 584 "fc=0x%02x", le16_to_cpu(fc)); 585 return mvm->probe_queue; 586 case NL80211_IFTYPE_P2P_DEVICE: 587 if (ieee80211_is_mgmt(fc)) 588 return mvm->p2p_dev_queue; 589 if (info->hw_queue == info->control.vif->cab_queue) 590 return mvmvif->cab_queue; 591 592 WARN_ON_ONCE(1); 593 return mvm->p2p_dev_queue; 594 default: 595 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 596 return -1; 597 } 598 } 599 600 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 601 { 602 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 603 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 604 struct ieee80211_tx_info info; 605 struct iwl_device_cmd *dev_cmd; 606 u8 sta_id; 607 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 608 int queue; 609 610 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used 611 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel 612 * queue. STATION (HS2.0) uses the auxiliary context of the FW, 613 * and hence needs to be sent on the aux queue 614 */ 615 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 616 skb_info->control.vif->type == NL80211_IFTYPE_STATION) 617 skb_info->hw_queue = mvm->aux_queue; 618 619 memcpy(&info, skb->cb, sizeof(info)); 620 621 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 622 return -1; 623 624 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 625 (!info.control.vif || 626 info.hw_queue != info.control.vif->cab_queue))) 627 return -1; 628 629 queue = info.hw_queue; 630 631 /* 632 * If the interface on which the frame is sent is the P2P_DEVICE 633 * or an AP/GO interface use the broadcast station associated 634 * with it; otherwise if the interface is a managed interface 635 * use the AP station associated with it for multicast traffic 636 * (this is not possible for unicast packets as a TLDS discovery 637 * response are sent without a station entry); otherwise use the 638 * AUX station. 639 */ 640 sta_id = mvm->aux_sta.sta_id; 641 if (info.control.vif) { 642 struct iwl_mvm_vif *mvmvif = 643 iwl_mvm_vif_from_mac80211(info.control.vif); 644 645 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 646 info.control.vif->type == NL80211_IFTYPE_AP || 647 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 648 sta_id = mvmvif->bcast_sta.sta_id; 649 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, 650 hdr->frame_control); 651 if (queue < 0) 652 return -1; 653 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 654 is_multicast_ether_addr(hdr->addr1)) { 655 u8 ap_sta_id = READ_ONCE(mvmvif->ap_sta_id); 656 657 if (ap_sta_id != IWL_MVM_INVALID_STA) 658 sta_id = ap_sta_id; 659 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 660 queue = mvm->snif_queue; 661 sta_id = mvm->snif_sta.sta_id; 662 } 663 } 664 665 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 666 667 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 668 if (!dev_cmd) 669 return -1; 670 671 /* From now on, we cannot access info->control */ 672 iwl_mvm_skb_prepare_status(skb, dev_cmd); 673 674 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 675 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 676 return -1; 677 } 678 679 return 0; 680 } 681 682 #ifdef CONFIG_INET 683 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 684 struct ieee80211_tx_info *info, 685 struct ieee80211_sta *sta, 686 struct sk_buff_head *mpdus_skb) 687 { 688 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 689 struct ieee80211_hdr *hdr = (void *)skb->data; 690 unsigned int mss = skb_shinfo(skb)->gso_size; 691 struct sk_buff *tmp, *next; 692 char cb[sizeof(skb->cb)]; 693 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 694 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 695 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 696 u16 snap_ip_tcp, pad, i = 0; 697 unsigned int dbg_max_amsdu_len; 698 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG; 699 u8 *qc, tid, txf; 700 701 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 702 tcp_hdrlen(skb); 703 704 dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len); 705 706 if (!sta->max_amsdu_len || 707 !ieee80211_is_data_qos(hdr->frame_control) || 708 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) { 709 num_subframes = 1; 710 pad = 0; 711 goto segment; 712 } 713 714 qc = ieee80211_get_qos_ctl(hdr); 715 tid = *qc & IEEE80211_QOS_CTL_TID_MASK; 716 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 717 return -EINVAL; 718 719 /* 720 * Do not build AMSDU for IPv6 with extension headers. 721 * ask stack to segment and checkum the generated MPDUs for us. 722 */ 723 if (skb->protocol == htons(ETH_P_IPV6) && 724 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 725 IPPROTO_TCP) { 726 num_subframes = 1; 727 pad = 0; 728 netdev_features &= ~NETIF_F_CSUM_MASK; 729 goto segment; 730 } 731 732 /* 733 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 734 * during an BA session. 735 */ 736 if (info->flags & IEEE80211_TX_CTL_AMPDU && 737 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) { 738 num_subframes = 1; 739 pad = 0; 740 goto segment; 741 } 742 743 max_amsdu_len = sta->max_amsdu_len; 744 745 /* the Tx FIFO to which this A-MSDU will be routed */ 746 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, tid_to_mac80211_ac[tid]); 747 748 /* 749 * Don't send an AMSDU that will be longer than the TXF. 750 * Add a security margin of 256 for the TX command + headers. 751 * We also want to have the start of the next packet inside the 752 * fifo to be able to send bursts. 753 */ 754 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 755 mvm->fwrt.smem_cfg.lmac[0].txfifo_size[txf] - 756 256); 757 758 if (unlikely(dbg_max_amsdu_len)) 759 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 760 dbg_max_amsdu_len); 761 762 /* 763 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 764 * supported. This is a spec requirement (IEEE 802.11-2015 765 * section 8.7.3 NOTE 3). 766 */ 767 if (info->flags & IEEE80211_TX_CTL_AMPDU && 768 !sta->vht_cap.vht_supported) 769 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 770 771 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 772 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 773 pad = (4 - subf_len) & 0x3; 774 775 /* 776 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 777 * N * subf_len + (N - 1) * pad. 778 */ 779 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 780 if (num_subframes > 1) 781 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 782 783 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 784 tcp_hdrlen(skb) + skb->data_len; 785 786 /* 787 * Make sure we have enough TBs for the A-MSDU: 788 * 2 for each subframe 789 * 1 more for each fragment 790 * 1 more for the potential data in the header 791 */ 792 num_subframes = 793 min_t(unsigned int, num_subframes, 794 (mvm->trans->max_skb_frags - 1 - 795 skb_shinfo(skb)->nr_frags) / 2); 796 797 /* This skb fits in one single A-MSDU */ 798 if (num_subframes * mss >= tcp_payload_len) { 799 __skb_queue_tail(mpdus_skb, skb); 800 return 0; 801 } 802 803 /* 804 * Trick the segmentation function to make it 805 * create SKBs that can fit into one A-MSDU. 806 */ 807 segment: 808 skb_shinfo(skb)->gso_size = num_subframes * mss; 809 memcpy(cb, skb->cb, sizeof(cb)); 810 811 next = skb_gso_segment(skb, netdev_features); 812 skb_shinfo(skb)->gso_size = mss; 813 if (WARN_ON_ONCE(IS_ERR(next))) 814 return -EINVAL; 815 else if (next) 816 consume_skb(skb); 817 818 while (next) { 819 tmp = next; 820 next = tmp->next; 821 822 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 823 /* 824 * Compute the length of all the data added for the A-MSDU. 825 * This will be used to compute the length to write in the TX 826 * command. We have: SNAP + IP + TCP for n -1 subframes and 827 * ETH header for n subframes. 828 */ 829 tcp_payload_len = skb_tail_pointer(tmp) - 830 skb_transport_header(tmp) - 831 tcp_hdrlen(tmp) + tmp->data_len; 832 833 if (ipv4) 834 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 835 836 if (tcp_payload_len > mss) { 837 skb_shinfo(tmp)->gso_size = mss; 838 } else { 839 if (ieee80211_is_data_qos(hdr->frame_control)) { 840 qc = ieee80211_get_qos_ctl((void *)tmp->data); 841 842 if (ipv4) 843 ip_send_check(ip_hdr(tmp)); 844 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 845 } 846 skb_shinfo(tmp)->gso_size = 0; 847 } 848 849 tmp->prev = NULL; 850 tmp->next = NULL; 851 852 __skb_queue_tail(mpdus_skb, tmp); 853 i++; 854 } 855 856 return 0; 857 } 858 #else /* CONFIG_INET */ 859 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 860 struct ieee80211_tx_info *info, 861 struct ieee80211_sta *sta, 862 struct sk_buff_head *mpdus_skb) 863 { 864 /* Impossible to get TSO with CONFIG_INET */ 865 WARN_ON(1); 866 867 return -1; 868 } 869 #endif 870 871 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, 872 struct iwl_mvm_sta *mvm_sta, u8 tid, 873 struct sk_buff *skb) 874 { 875 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 876 u8 mac_queue = info->hw_queue; 877 struct sk_buff_head *deferred_tx_frames; 878 879 lockdep_assert_held(&mvm_sta->lock); 880 881 mvm_sta->deferred_traffic_tid_map |= BIT(tid); 882 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); 883 884 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; 885 886 skb_queue_tail(deferred_tx_frames, skb); 887 888 /* 889 * The first deferred frame should've stopped the MAC queues, so we 890 * should never get a second deferred frame for the RA/TID. 891 * In case of GSO the first packet may have been split, so don't warn. 892 */ 893 if (skb_queue_len(deferred_tx_frames) == 1) { 894 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); 895 schedule_work(&mvm->add_stream_wk); 896 } 897 } 898 899 /* Check if there are any timed-out TIDs on a given shared TXQ */ 900 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 901 { 902 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 903 unsigned long now = jiffies; 904 int tid; 905 906 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 907 return false; 908 909 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 910 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 911 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 912 return true; 913 } 914 915 return false; 916 } 917 918 /* 919 * Sets the fields in the Tx cmd that are crypto related 920 */ 921 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 922 struct ieee80211_tx_info *info, 923 struct ieee80211_sta *sta) 924 { 925 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 926 struct iwl_mvm_sta *mvmsta; 927 struct iwl_device_cmd *dev_cmd; 928 __le16 fc; 929 u16 seq_number = 0; 930 u8 tid = IWL_MAX_TID_COUNT; 931 u16 txq_id = info->hw_queue; 932 bool is_ampdu = false; 933 int hdrlen; 934 935 mvmsta = iwl_mvm_sta_from_mac80211(sta); 936 fc = hdr->frame_control; 937 hdrlen = ieee80211_hdrlen(fc); 938 939 if (WARN_ON_ONCE(!mvmsta)) 940 return -1; 941 942 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 943 return -1; 944 945 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 946 sta, mvmsta->sta_id); 947 if (!dev_cmd) 948 goto drop; 949 950 /* 951 * we handle that entirely ourselves -- for uAPSD the firmware 952 * will always send a notification, and for PS-Poll responses 953 * we'll notify mac80211 when getting frame status 954 */ 955 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 956 957 spin_lock(&mvmsta->lock); 958 959 /* nullfunc frames should go to the MGMT queue regardless of QOS, 960 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 961 * assignment of MGMT TID 962 */ 963 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 964 u8 *qc = NULL; 965 qc = ieee80211_get_qos_ctl(hdr); 966 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 967 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 968 goto drop_unlock_sta; 969 970 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 971 if (WARN_ON_ONCE(is_ampdu && 972 mvmsta->tid_data[tid].state != IWL_AGG_ON)) 973 goto drop_unlock_sta; 974 975 seq_number = mvmsta->tid_data[tid].seq_number; 976 seq_number &= IEEE80211_SCTL_SEQ; 977 978 if (!iwl_mvm_has_new_tx_api(mvm)) { 979 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 980 981 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 982 hdr->seq_ctrl |= cpu_to_le16(seq_number); 983 /* update the tx_cmd hdr as it was already copied */ 984 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 985 } 986 } 987 988 txq_id = mvmsta->tid_data[tid].txq_id; 989 990 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 991 992 /* Check if TXQ needs to be allocated or re-activated */ 993 if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE || 994 !mvmsta->tid_data[tid].is_tid_active)) { 995 /* If TXQ needs to be allocated... */ 996 if (txq_id == IWL_MVM_INVALID_QUEUE) { 997 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); 998 999 /* 1000 * The frame is now deferred, and the worker scheduled 1001 * will re-allocate it, so we can free it for now. 1002 */ 1003 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1004 spin_unlock(&mvmsta->lock); 1005 return 0; 1006 } 1007 1008 /* queue should always be active in new TX path */ 1009 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1010 1011 /* If we are here - TXQ exists and needs to be re-activated */ 1012 spin_lock(&mvm->queue_info_lock); 1013 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1014 mvmsta->tid_data[tid].is_tid_active = true; 1015 spin_unlock(&mvm->queue_info_lock); 1016 1017 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n", 1018 txq_id); 1019 } 1020 1021 if (!iwl_mvm_has_new_tx_api(mvm)) { 1022 /* Keep track of the time of the last frame for this RA/TID */ 1023 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1024 1025 /* 1026 * If we have timed-out TIDs - schedule the worker that will 1027 * reconfig the queues and update them 1028 * 1029 * Note that the mvm->queue_info_lock isn't being taken here in 1030 * order to not serialize the TX flow. This isn't dangerous 1031 * because scheduling mvm->add_stream_wk can't ruin the state, 1032 * and if we DON'T schedule it due to some race condition then 1033 * next TX we get here we will. 1034 */ 1035 if (unlikely(mvm->queue_info[txq_id].status == 1036 IWL_MVM_QUEUE_SHARED && 1037 iwl_mvm_txq_should_update(mvm, txq_id))) 1038 schedule_work(&mvm->add_stream_wk); 1039 } 1040 1041 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 1042 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 1043 1044 /* From now on, we cannot access info->control */ 1045 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1046 1047 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1048 goto drop_unlock_sta; 1049 1050 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1051 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1052 1053 spin_unlock(&mvmsta->lock); 1054 1055 return 0; 1056 1057 drop_unlock_sta: 1058 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1059 spin_unlock(&mvmsta->lock); 1060 drop: 1061 return -1; 1062 } 1063 1064 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 1065 struct ieee80211_sta *sta) 1066 { 1067 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1068 struct ieee80211_tx_info info; 1069 struct sk_buff_head mpdus_skbs; 1070 unsigned int payload_len; 1071 int ret; 1072 1073 if (WARN_ON_ONCE(!mvmsta)) 1074 return -1; 1075 1076 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1077 return -1; 1078 1079 memcpy(&info, skb->cb, sizeof(info)); 1080 1081 if (!skb_is_gso(skb)) 1082 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1083 1084 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1085 tcp_hdrlen(skb) + skb->data_len; 1086 1087 if (payload_len <= skb_shinfo(skb)->gso_size) 1088 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1089 1090 __skb_queue_head_init(&mpdus_skbs); 1091 1092 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1093 if (ret) 1094 return ret; 1095 1096 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1097 return ret; 1098 1099 while (!skb_queue_empty(&mpdus_skbs)) { 1100 skb = __skb_dequeue(&mpdus_skbs); 1101 1102 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1103 if (ret) { 1104 __skb_queue_purge(&mpdus_skbs); 1105 return ret; 1106 } 1107 } 1108 1109 return 0; 1110 } 1111 1112 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1113 struct ieee80211_sta *sta, u8 tid) 1114 { 1115 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1116 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1117 struct ieee80211_vif *vif = mvmsta->vif; 1118 u16 normalized_ssn; 1119 1120 lockdep_assert_held(&mvmsta->lock); 1121 1122 if ((tid_data->state == IWL_AGG_ON || 1123 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1124 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1125 /* 1126 * Now that this aggregation or DQA queue is empty tell 1127 * mac80211 so it knows we no longer have frames buffered for 1128 * the station on this TID (for the TIM bitmap calculation.) 1129 */ 1130 ieee80211_sta_set_buffered(sta, tid, false); 1131 } 1132 1133 /* 1134 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1135 * to align the wrap around of ssn so we compare relevant values. 1136 */ 1137 normalized_ssn = tid_data->ssn; 1138 if (mvm->trans->cfg->gen2) 1139 normalized_ssn &= 0xff; 1140 1141 if (normalized_ssn != tid_data->next_reclaimed) 1142 return; 1143 1144 switch (tid_data->state) { 1145 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1146 IWL_DEBUG_TX_QUEUES(mvm, 1147 "Can continue addBA flow ssn = next_recl = %d\n", 1148 tid_data->next_reclaimed); 1149 tid_data->state = IWL_AGG_STARTING; 1150 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1151 break; 1152 1153 case IWL_EMPTYING_HW_QUEUE_DELBA: 1154 IWL_DEBUG_TX_QUEUES(mvm, 1155 "Can continue DELBA flow ssn = next_recl = %d\n", 1156 tid_data->next_reclaimed); 1157 tid_data->state = IWL_AGG_OFF; 1158 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1159 break; 1160 1161 default: 1162 break; 1163 } 1164 } 1165 1166 #ifdef CONFIG_IWLWIFI_DEBUG 1167 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1168 { 1169 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1170 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1171 1172 switch (status & TX_STATUS_MSK) { 1173 case TX_STATUS_SUCCESS: 1174 return "SUCCESS"; 1175 TX_STATUS_POSTPONE(DELAY); 1176 TX_STATUS_POSTPONE(FEW_BYTES); 1177 TX_STATUS_POSTPONE(BT_PRIO); 1178 TX_STATUS_POSTPONE(QUIET_PERIOD); 1179 TX_STATUS_POSTPONE(CALC_TTAK); 1180 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1181 TX_STATUS_FAIL(SHORT_LIMIT); 1182 TX_STATUS_FAIL(LONG_LIMIT); 1183 TX_STATUS_FAIL(UNDERRUN); 1184 TX_STATUS_FAIL(DRAIN_FLOW); 1185 TX_STATUS_FAIL(RFKILL_FLUSH); 1186 TX_STATUS_FAIL(LIFE_EXPIRE); 1187 TX_STATUS_FAIL(DEST_PS); 1188 TX_STATUS_FAIL(HOST_ABORTED); 1189 TX_STATUS_FAIL(BT_RETRY); 1190 TX_STATUS_FAIL(STA_INVALID); 1191 TX_STATUS_FAIL(FRAG_DROPPED); 1192 TX_STATUS_FAIL(TID_DISABLE); 1193 TX_STATUS_FAIL(FIFO_FLUSHED); 1194 TX_STATUS_FAIL(SMALL_CF_POLL); 1195 TX_STATUS_FAIL(FW_DROP); 1196 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1197 } 1198 1199 return "UNKNOWN"; 1200 1201 #undef TX_STATUS_FAIL 1202 #undef TX_STATUS_POSTPONE 1203 } 1204 #endif /* CONFIG_IWLWIFI_DEBUG */ 1205 1206 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1207 enum nl80211_band band, 1208 struct ieee80211_tx_rate *r) 1209 { 1210 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1211 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1212 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1213 case RATE_MCS_CHAN_WIDTH_20: 1214 break; 1215 case RATE_MCS_CHAN_WIDTH_40: 1216 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1217 break; 1218 case RATE_MCS_CHAN_WIDTH_80: 1219 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1220 break; 1221 case RATE_MCS_CHAN_WIDTH_160: 1222 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1223 break; 1224 } 1225 if (rate_n_flags & RATE_MCS_SGI_MSK) 1226 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1227 if (rate_n_flags & RATE_MCS_HT_MSK) { 1228 r->flags |= IEEE80211_TX_RC_MCS; 1229 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1230 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1231 ieee80211_rate_set_vht( 1232 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1233 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1234 RATE_VHT_MCS_NSS_POS) + 1); 1235 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1236 } else { 1237 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1238 band); 1239 } 1240 } 1241 1242 /** 1243 * translate ucode response to mac80211 tx status control values 1244 */ 1245 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1246 struct ieee80211_tx_info *info) 1247 { 1248 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1249 1250 info->status.antenna = 1251 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1252 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1253 } 1254 1255 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1256 u32 status) 1257 { 1258 struct iwl_fw_dbg_trigger_tlv *trig; 1259 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1260 int i; 1261 1262 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) 1263 return; 1264 1265 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); 1266 status_trig = (void *)trig->data; 1267 1268 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig)) 1269 return; 1270 1271 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1272 /* don't collect on status 0 */ 1273 if (!status_trig->statuses[i].status) 1274 break; 1275 1276 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1277 continue; 1278 1279 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1280 "Tx status %d was received", 1281 status & TX_STATUS_MSK); 1282 break; 1283 } 1284 } 1285 1286 /** 1287 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1288 * @tx_resp: the Tx response from the fw (agg or non-agg) 1289 * 1290 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1291 * it can't know that everything will go well until the end of the AMPDU, it 1292 * can't know in advance the number of MPDUs that will be sent in the current 1293 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1294 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1295 * of the batch. This is why the SSN of the SCD is written at the end of the 1296 * whole struct at a variable offset. This function knows how to cope with the 1297 * variable offset and returns the SSN of the SCD. 1298 */ 1299 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1300 struct iwl_mvm_tx_resp *tx_resp) 1301 { 1302 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1303 tx_resp->frame_count) & 0xfff; 1304 } 1305 1306 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1307 struct iwl_rx_packet *pkt) 1308 { 1309 struct ieee80211_sta *sta; 1310 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1311 int txq_id = SEQ_TO_QUEUE(sequence); 1312 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1313 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1314 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1315 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1316 struct agg_tx_status *agg_status = 1317 iwl_mvm_get_agg_status(mvm, tx_resp); 1318 u32 status = le16_to_cpu(agg_status->status); 1319 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1320 struct iwl_mvm_sta *mvmsta; 1321 struct sk_buff_head skbs; 1322 u8 skb_freed = 0; 1323 u8 lq_color; 1324 u16 next_reclaimed, seq_ctl; 1325 bool is_ndp = false; 1326 1327 __skb_queue_head_init(&skbs); 1328 1329 if (iwl_mvm_has_new_tx_api(mvm)) 1330 txq_id = le16_to_cpu(tx_resp->tx_queue); 1331 1332 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1333 1334 /* we can free until ssn % q.n_bd not inclusive */ 1335 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1336 1337 while (!skb_queue_empty(&skbs)) { 1338 struct sk_buff *skb = __skb_dequeue(&skbs); 1339 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1340 bool flushed = false; 1341 1342 skb_freed++; 1343 1344 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1345 1346 memset(&info->status, 0, sizeof(info->status)); 1347 1348 /* inform mac80211 about what happened with the frame */ 1349 switch (status & TX_STATUS_MSK) { 1350 case TX_STATUS_SUCCESS: 1351 case TX_STATUS_DIRECT_DONE: 1352 info->flags |= IEEE80211_TX_STAT_ACK; 1353 break; 1354 case TX_STATUS_FAIL_FIFO_FLUSHED: 1355 case TX_STATUS_FAIL_DRAIN_FLOW: 1356 flushed = true; 1357 break; 1358 case TX_STATUS_FAIL_DEST_PS: 1359 /* the FW should have stopped the queue and not 1360 * return this status 1361 */ 1362 WARN_ON(1); 1363 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1364 break; 1365 default: 1366 break; 1367 } 1368 1369 iwl_mvm_tx_status_check_trigger(mvm, status); 1370 1371 info->status.rates[0].count = tx_resp->failure_frame + 1; 1372 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1373 info); 1374 info->status.status_driver_data[1] = 1375 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1376 1377 /* Single frame failure in an AMPDU queue => send BAR */ 1378 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1379 !(info->flags & IEEE80211_TX_STAT_ACK) && 1380 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1381 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1382 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1383 1384 /* W/A FW bug: seq_ctl is wrong when the status isn't success */ 1385 if (status != TX_STATUS_SUCCESS) { 1386 struct ieee80211_hdr *hdr = (void *)skb->data; 1387 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1388 } 1389 1390 if (unlikely(!seq_ctl)) { 1391 struct ieee80211_hdr *hdr = (void *)skb->data; 1392 1393 /* 1394 * If it is an NDP, we can't update next_reclaim since 1395 * its sequence control is 0. Note that for that same 1396 * reason, NDPs are never sent to A-MPDU'able queues 1397 * so that we can never have more than one freed frame 1398 * for a single Tx resonse (see WARN_ON below). 1399 */ 1400 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1401 is_ndp = true; 1402 } 1403 1404 /* 1405 * TODO: this is not accurate if we are freeing more than one 1406 * packet. 1407 */ 1408 info->status.tx_time = 1409 le16_to_cpu(tx_resp->wireless_media_time); 1410 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1411 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1412 info->status.status_driver_data[0] = 1413 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1414 1415 ieee80211_tx_status(mvm->hw, skb); 1416 } 1417 1418 /* This is an aggregation queue or might become one, so we use 1419 * the ssn since: ssn = wifi seq_num % 256. 1420 * The seq_ctl is the sequence control of the packet to which 1421 * this Tx response relates. But if there is a hole in the 1422 * bitmap of the BA we received, this Tx response may allow to 1423 * reclaim the hole and all the subsequent packets that were 1424 * already acked. In that case, seq_ctl != ssn, and the next 1425 * packet to be reclaimed will be ssn and not seq_ctl. In that 1426 * case, several packets will be reclaimed even if 1427 * frame_count = 1. 1428 * 1429 * The ssn is the index (% 256) of the latest packet that has 1430 * treated (acked / dropped) + 1. 1431 */ 1432 next_reclaimed = ssn; 1433 1434 IWL_DEBUG_TX_REPLY(mvm, 1435 "TXQ %d status %s (0x%08x)\n", 1436 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1437 1438 IWL_DEBUG_TX_REPLY(mvm, 1439 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1440 le32_to_cpu(tx_resp->initial_rate), 1441 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1442 ssn, next_reclaimed, seq_ctl); 1443 1444 rcu_read_lock(); 1445 1446 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1447 /* 1448 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1449 * the firmware while we still have packets for it in the Tx queues. 1450 */ 1451 if (WARN_ON_ONCE(!sta)) 1452 goto out; 1453 1454 if (!IS_ERR(sta)) { 1455 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1456 1457 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) { 1458 struct iwl_mvm_tid_data *tid_data = 1459 &mvmsta->tid_data[tid]; 1460 bool send_eosp_ndp = false; 1461 1462 spin_lock_bh(&mvmsta->lock); 1463 1464 if (!is_ndp) { 1465 tid_data->next_reclaimed = next_reclaimed; 1466 IWL_DEBUG_TX_REPLY(mvm, 1467 "Next reclaimed packet:%d\n", 1468 next_reclaimed); 1469 } else { 1470 IWL_DEBUG_TX_REPLY(mvm, 1471 "NDP - don't update next_reclaimed\n"); 1472 } 1473 1474 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1475 1476 if (mvmsta->sleep_tx_count) { 1477 mvmsta->sleep_tx_count--; 1478 if (mvmsta->sleep_tx_count && 1479 !iwl_mvm_tid_queued(mvm, tid_data)) { 1480 /* 1481 * The number of frames in the queue 1482 * dropped to 0 even if we sent less 1483 * frames than we thought we had on the 1484 * Tx queue. 1485 * This means we had holes in the BA 1486 * window that we just filled, ask 1487 * mac80211 to send EOSP since the 1488 * firmware won't know how to do that. 1489 * Send NDP and the firmware will send 1490 * EOSP notification that will trigger 1491 * a call to ieee80211_sta_eosp(). 1492 */ 1493 send_eosp_ndp = true; 1494 } 1495 } 1496 1497 spin_unlock_bh(&mvmsta->lock); 1498 if (send_eosp_ndp) { 1499 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1500 IEEE80211_FRAME_RELEASE_UAPSD, 1501 1, tid, false, false); 1502 mvmsta->sleep_tx_count = 0; 1503 ieee80211_send_eosp_nullfunc(sta, tid); 1504 } 1505 } 1506 1507 if (mvmsta->next_status_eosp) { 1508 mvmsta->next_status_eosp = false; 1509 ieee80211_sta_eosp(sta); 1510 } 1511 } else { 1512 mvmsta = NULL; 1513 } 1514 1515 out: 1516 rcu_read_unlock(); 1517 } 1518 1519 #ifdef CONFIG_IWLWIFI_DEBUG 1520 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1521 static const char *iwl_get_agg_tx_status(u16 status) 1522 { 1523 switch (status & AGG_TX_STATE_STATUS_MSK) { 1524 AGG_TX_STATE_(TRANSMITTED); 1525 AGG_TX_STATE_(UNDERRUN); 1526 AGG_TX_STATE_(BT_PRIO); 1527 AGG_TX_STATE_(FEW_BYTES); 1528 AGG_TX_STATE_(ABORT); 1529 AGG_TX_STATE_(TX_ON_AIR_DROP); 1530 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1531 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1532 AGG_TX_STATE_(SCD_QUERY); 1533 AGG_TX_STATE_(TEST_BAD_CRC32); 1534 AGG_TX_STATE_(RESPONSE); 1535 AGG_TX_STATE_(DUMP_TX); 1536 AGG_TX_STATE_(DELAY_TX); 1537 } 1538 1539 return "UNKNOWN"; 1540 } 1541 1542 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1543 struct iwl_rx_packet *pkt) 1544 { 1545 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1546 struct agg_tx_status *frame_status = 1547 iwl_mvm_get_agg_status(mvm, tx_resp); 1548 int i; 1549 1550 for (i = 0; i < tx_resp->frame_count; i++) { 1551 u16 fstatus = le16_to_cpu(frame_status[i].status); 1552 1553 IWL_DEBUG_TX_REPLY(mvm, 1554 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1555 iwl_get_agg_tx_status(fstatus), 1556 fstatus & AGG_TX_STATE_STATUS_MSK, 1557 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1558 AGG_TX_STATE_TRY_CNT_POS, 1559 le16_to_cpu(frame_status[i].sequence)); 1560 } 1561 } 1562 #else 1563 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1564 struct iwl_rx_packet *pkt) 1565 {} 1566 #endif /* CONFIG_IWLWIFI_DEBUG */ 1567 1568 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1569 struct iwl_rx_packet *pkt) 1570 { 1571 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1572 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1573 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1574 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1575 struct iwl_mvm_sta *mvmsta; 1576 int queue = SEQ_TO_QUEUE(sequence); 1577 1578 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1579 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1580 return; 1581 1582 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) 1583 return; 1584 1585 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1586 1587 rcu_read_lock(); 1588 1589 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1590 1591 if (!WARN_ON_ONCE(!mvmsta)) { 1592 mvmsta->tid_data[tid].rate_n_flags = 1593 le32_to_cpu(tx_resp->initial_rate); 1594 mvmsta->tid_data[tid].tx_time = 1595 le16_to_cpu(tx_resp->wireless_media_time); 1596 mvmsta->tid_data[tid].lq_color = 1597 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1598 } 1599 1600 rcu_read_unlock(); 1601 } 1602 1603 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1604 { 1605 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1606 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1607 1608 if (tx_resp->frame_count == 1) 1609 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1610 else 1611 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1612 } 1613 1614 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1615 int txq, int index, 1616 struct ieee80211_tx_info *ba_info, u32 rate) 1617 { 1618 struct sk_buff_head reclaimed_skbs; 1619 struct iwl_mvm_tid_data *tid_data; 1620 struct ieee80211_sta *sta; 1621 struct iwl_mvm_sta *mvmsta; 1622 struct sk_buff *skb; 1623 int freed; 1624 1625 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1626 tid > IWL_MAX_TID_COUNT, 1627 "sta_id %d tid %d", sta_id, tid)) 1628 return; 1629 1630 rcu_read_lock(); 1631 1632 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1633 1634 /* Reclaiming frames for a station that has been deleted ? */ 1635 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1636 rcu_read_unlock(); 1637 return; 1638 } 1639 1640 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1641 tid_data = &mvmsta->tid_data[tid]; 1642 1643 if (tid_data->txq_id != txq) { 1644 IWL_ERR(mvm, 1645 "invalid BA notification: Q %d, tid %d\n", 1646 tid_data->txq_id, tid); 1647 rcu_read_unlock(); 1648 return; 1649 } 1650 1651 spin_lock_bh(&mvmsta->lock); 1652 1653 __skb_queue_head_init(&reclaimed_skbs); 1654 1655 /* 1656 * Release all TFDs before the SSN, i.e. all TFDs in front of 1657 * block-ack window (we assume that they've been successfully 1658 * transmitted ... if not, it's too late anyway). 1659 */ 1660 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1661 1662 tid_data->next_reclaimed = index; 1663 1664 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1665 1666 freed = 0; 1667 1668 /* pack lq color from tid_data along the reduced txp */ 1669 ba_info->status.status_driver_data[0] = 1670 RS_DRV_DATA_PACK(tid_data->lq_color, 1671 ba_info->status.status_driver_data[0]); 1672 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1673 1674 skb_queue_walk(&reclaimed_skbs, skb) { 1675 struct ieee80211_hdr *hdr = (void *)skb->data; 1676 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1677 1678 if (ieee80211_is_data_qos(hdr->frame_control)) 1679 freed++; 1680 else 1681 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1682 1683 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1684 1685 memset(&info->status, 0, sizeof(info->status)); 1686 /* Packet was transmitted successfully, failures come as single 1687 * frames because before failing a frame the firmware transmits 1688 * it without aggregation at least once. 1689 */ 1690 info->flags |= IEEE80211_TX_STAT_ACK; 1691 1692 /* this is the first skb we deliver in this batch */ 1693 /* put the rate scaling data there */ 1694 if (freed == 1) { 1695 info->flags |= IEEE80211_TX_STAT_AMPDU; 1696 memcpy(&info->status, &ba_info->status, 1697 sizeof(ba_info->status)); 1698 iwl_mvm_hwrate_to_tx_status(rate, info); 1699 } 1700 } 1701 1702 spin_unlock_bh(&mvmsta->lock); 1703 1704 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1705 * possible (i.e. first MPDU in the aggregation wasn't acked) 1706 * Still it's important to update RS about sent vs. acked. 1707 */ 1708 if (skb_queue_empty(&reclaimed_skbs)) { 1709 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1710 1711 if (mvmsta->vif) 1712 chanctx_conf = 1713 rcu_dereference(mvmsta->vif->chanctx_conf); 1714 1715 if (WARN_ON_ONCE(!chanctx_conf)) 1716 goto out; 1717 1718 ba_info->band = chanctx_conf->def.chan->band; 1719 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1720 1721 if (!iwl_mvm_has_tlc_offload(mvm)) { 1722 IWL_DEBUG_TX_REPLY(mvm, 1723 "No reclaim. Update rs directly\n"); 1724 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1725 } 1726 } 1727 1728 out: 1729 rcu_read_unlock(); 1730 1731 while (!skb_queue_empty(&reclaimed_skbs)) { 1732 skb = __skb_dequeue(&reclaimed_skbs); 1733 ieee80211_tx_status(mvm->hw, skb); 1734 } 1735 } 1736 1737 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1738 { 1739 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1740 int sta_id, tid, txq, index; 1741 struct ieee80211_tx_info ba_info = {}; 1742 struct iwl_mvm_ba_notif *ba_notif; 1743 struct iwl_mvm_tid_data *tid_data; 1744 struct iwl_mvm_sta *mvmsta; 1745 1746 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1747 1748 if (iwl_mvm_has_new_tx_api(mvm)) { 1749 struct iwl_mvm_compressed_ba_notif *ba_res = 1750 (void *)pkt->data; 1751 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 1752 int i; 1753 1754 sta_id = ba_res->sta_id; 1755 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1756 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1757 ba_info.status.tx_time = 1758 (u16)le32_to_cpu(ba_res->wireless_time); 1759 ba_info.status.status_driver_data[0] = 1760 (void *)(uintptr_t)ba_res->reduced_txp; 1761 1762 if (!le16_to_cpu(ba_res->tfd_cnt)) 1763 goto out; 1764 1765 rcu_read_lock(); 1766 1767 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1768 if (!mvmsta) 1769 goto out_unlock; 1770 1771 /* Free per TID */ 1772 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { 1773 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1774 &ba_res->tfd[i]; 1775 1776 tid = ba_tfd->tid; 1777 if (tid == IWL_MGMT_TID) 1778 tid = IWL_MAX_TID_COUNT; 1779 1780 mvmsta->tid_data[i].lq_color = lq_color; 1781 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 1782 (int)(le16_to_cpu(ba_tfd->q_num)), 1783 le16_to_cpu(ba_tfd->tfd_index), 1784 &ba_info, 1785 le32_to_cpu(ba_res->tx_rate)); 1786 } 1787 1788 out_unlock: 1789 rcu_read_unlock(); 1790 out: 1791 IWL_DEBUG_TX_REPLY(mvm, 1792 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1793 sta_id, le32_to_cpu(ba_res->flags), 1794 le16_to_cpu(ba_res->txed), 1795 le16_to_cpu(ba_res->done)); 1796 return; 1797 } 1798 1799 ba_notif = (void *)pkt->data; 1800 sta_id = ba_notif->sta_id; 1801 tid = ba_notif->tid; 1802 /* "flow" corresponds to Tx queue */ 1803 txq = le16_to_cpu(ba_notif->scd_flow); 1804 /* "ssn" is start of block-ack Tx window, corresponds to index 1805 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1806 index = le16_to_cpu(ba_notif->scd_ssn); 1807 1808 rcu_read_lock(); 1809 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1810 if (WARN_ON_ONCE(!mvmsta)) { 1811 rcu_read_unlock(); 1812 return; 1813 } 1814 1815 tid_data = &mvmsta->tid_data[tid]; 1816 1817 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1818 ba_info.status.ampdu_len = ba_notif->txed; 1819 ba_info.status.tx_time = tid_data->tx_time; 1820 ba_info.status.status_driver_data[0] = 1821 (void *)(uintptr_t)ba_notif->reduced_txp; 1822 1823 rcu_read_unlock(); 1824 1825 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1826 tid_data->rate_n_flags); 1827 1828 IWL_DEBUG_TX_REPLY(mvm, 1829 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1830 ba_notif->sta_addr, ba_notif->sta_id); 1831 1832 IWL_DEBUG_TX_REPLY(mvm, 1833 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1834 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1835 le64_to_cpu(ba_notif->bitmap), txq, index, 1836 ba_notif->txed, ba_notif->txed_2_done); 1837 1838 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1839 ba_notif->reduced_txp); 1840 } 1841 1842 /* 1843 * Note that there are transports that buffer frames before they reach 1844 * the firmware. This means that after flush_tx_path is called, the 1845 * queue might not be empty. The race-free way to handle this is to: 1846 * 1) set the station as draining 1847 * 2) flush the Tx path 1848 * 3) wait for the transport queues to be empty 1849 */ 1850 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 1851 { 1852 int ret; 1853 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 1854 .queues_ctl = cpu_to_le32(tfd_msk), 1855 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 1856 }; 1857 1858 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1859 1860 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1861 sizeof(flush_cmd), &flush_cmd); 1862 if (ret) 1863 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1864 return ret; 1865 } 1866 1867 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, 1868 u16 tids, u32 flags) 1869 { 1870 int ret; 1871 struct iwl_tx_path_flush_cmd flush_cmd = { 1872 .sta_id = cpu_to_le32(sta_id), 1873 .tid_mask = cpu_to_le16(tids), 1874 }; 1875 1876 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 1877 1878 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1879 sizeof(flush_cmd), &flush_cmd); 1880 if (ret) 1881 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1882 return ret; 1883 } 1884 1885 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags) 1886 { 1887 struct iwl_mvm_int_sta *int_sta = sta; 1888 struct iwl_mvm_sta *mvm_sta = sta; 1889 1890 if (iwl_mvm_has_new_tx_api(mvm)) { 1891 if (internal) 1892 return iwl_mvm_flush_sta_tids(mvm, int_sta->sta_id, 1893 BIT(IWL_MGMT_TID), flags); 1894 1895 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 1896 0xFF, flags); 1897 } 1898 1899 if (internal) 1900 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 1901 flags); 1902 1903 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags); 1904 } 1905