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 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 423 u64 pn; 424 425 switch (keyconf->cipher) { 426 case WLAN_CIPHER_SUITE_CCMP: 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 type = TX_CMD_SEC_GCMP; 451 /* Fall through */ 452 case WLAN_CIPHER_SUITE_CCMP_256: 453 /* TODO: Taking the key from the table might introduce a race 454 * when PTK rekeying is done, having an old packets with a PN 455 * based on the old key but the message encrypted with a new 456 * one. 457 * Need to handle this. 458 */ 459 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 460 tx_cmd->key[0] = keyconf->hw_key_idx; 461 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 462 break; 463 default: 464 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 465 } 466 } 467 468 /* 469 * Allocates and sets the Tx cmd the driver data pointers in the skb 470 */ 471 static struct iwl_device_cmd * 472 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 473 struct ieee80211_tx_info *info, int hdrlen, 474 struct ieee80211_sta *sta, u8 sta_id) 475 { 476 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 477 struct iwl_device_cmd *dev_cmd; 478 struct iwl_tx_cmd *tx_cmd; 479 480 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 481 482 if (unlikely(!dev_cmd)) 483 return NULL; 484 485 /* Make sure we zero enough of dev_cmd */ 486 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd)); 487 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) > sizeof(*tx_cmd)); 488 489 memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd)); 490 dev_cmd->hdr.cmd = TX_CMD; 491 492 if (iwl_mvm_has_new_tx_api(mvm)) { 493 u16 offload_assist = 0; 494 u32 rate_n_flags = 0; 495 u16 flags = 0; 496 497 if (ieee80211_is_data_qos(hdr->frame_control)) { 498 u8 *qc = ieee80211_get_qos_ctl(hdr); 499 500 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 501 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 502 } 503 504 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, 505 offload_assist); 506 507 /* padding is inserted later in transport */ 508 if (ieee80211_hdrlen(hdr->frame_control) % 4 && 509 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 510 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 511 512 if (!info->control.hw_key) 513 flags |= IWL_TX_FLAGS_ENCRYPT_DIS; 514 515 /* For data packets rate info comes from the fw */ 516 if (!(ieee80211_is_data(hdr->frame_control) && sta)) { 517 flags |= IWL_TX_FLAGS_CMD_RATE; 518 rate_n_flags = iwl_mvm_get_tx_rate(mvm, info, sta); 519 } 520 521 if (mvm->trans->cfg->device_family >= 522 IWL_DEVICE_FAMILY_22560) { 523 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload; 524 525 cmd->offload_assist |= cpu_to_le32(offload_assist); 526 527 /* Total # bytes to be transmitted */ 528 cmd->len = cpu_to_le16((u16)skb->len); 529 530 /* Copy MAC header from skb into command buffer */ 531 memcpy(cmd->hdr, hdr, hdrlen); 532 533 cmd->flags = cpu_to_le16(flags); 534 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 535 } else { 536 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 537 538 cmd->offload_assist |= cpu_to_le16(offload_assist); 539 540 /* Total # bytes to be transmitted */ 541 cmd->len = cpu_to_le16((u16)skb->len); 542 543 /* Copy MAC header from skb into command buffer */ 544 memcpy(cmd->hdr, hdr, hdrlen); 545 546 cmd->flags = cpu_to_le32(flags); 547 cmd->rate_n_flags = cpu_to_le32(rate_n_flags); 548 } 549 goto out; 550 } 551 552 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 553 554 if (info->control.hw_key) 555 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 556 557 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 558 559 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 560 561 /* Copy MAC header from skb into command buffer */ 562 memcpy(tx_cmd->hdr, hdr, hdrlen); 563 564 out: 565 return dev_cmd; 566 } 567 568 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 569 struct iwl_device_cmd *cmd) 570 { 571 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 572 573 memset(&skb_info->status, 0, sizeof(skb_info->status)); 574 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 575 576 skb_info->driver_data[1] = cmd; 577 } 578 579 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 580 struct ieee80211_tx_info *info, __le16 fc) 581 { 582 struct iwl_mvm_vif *mvmvif; 583 584 mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif); 585 586 switch (info->control.vif->type) { 587 case NL80211_IFTYPE_AP: 588 case NL80211_IFTYPE_ADHOC: 589 /* 590 * Non-bufferable frames use the broadcast station, thus they 591 * use the probe queue. 592 * Also take care of the case where we send a deauth to a 593 * station that we don't have, or similarly an association 594 * response (with non-success status) for a station we can't 595 * accept. 596 * Also, disassociate frames might happen, particular with 597 * reason 7 ("Class 3 frame received from nonassociated STA"). 598 */ 599 if (ieee80211_is_mgmt(fc) && 600 (!ieee80211_is_bufferable_mmpdu(fc) || 601 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 602 return mvm->probe_queue; 603 if (info->hw_queue == info->control.vif->cab_queue) 604 return mvmvif->cab_queue; 605 606 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 607 "fc=0x%02x", le16_to_cpu(fc)); 608 return mvm->probe_queue; 609 case NL80211_IFTYPE_P2P_DEVICE: 610 if (ieee80211_is_mgmt(fc)) 611 return mvm->p2p_dev_queue; 612 if (info->hw_queue == info->control.vif->cab_queue) 613 return mvmvif->cab_queue; 614 615 WARN_ON_ONCE(1); 616 return mvm->p2p_dev_queue; 617 default: 618 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 619 return -1; 620 } 621 } 622 623 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 624 { 625 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 626 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 627 struct ieee80211_tx_info info; 628 struct iwl_device_cmd *dev_cmd; 629 u8 sta_id; 630 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 631 int queue; 632 633 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used 634 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel 635 * queue. STATION (HS2.0) uses the auxiliary context of the FW, 636 * and hence needs to be sent on the aux queue 637 */ 638 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 639 skb_info->control.vif->type == NL80211_IFTYPE_STATION) 640 skb_info->hw_queue = mvm->aux_queue; 641 642 memcpy(&info, skb->cb, sizeof(info)); 643 644 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 645 return -1; 646 647 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 648 (!info.control.vif || 649 info.hw_queue != info.control.vif->cab_queue))) 650 return -1; 651 652 queue = info.hw_queue; 653 654 /* 655 * If the interface on which the frame is sent is the P2P_DEVICE 656 * or an AP/GO interface use the broadcast station associated 657 * with it; otherwise if the interface is a managed interface 658 * use the AP station associated with it for multicast traffic 659 * (this is not possible for unicast packets as a TLDS discovery 660 * response are sent without a station entry); otherwise use the 661 * AUX station. 662 */ 663 sta_id = mvm->aux_sta.sta_id; 664 if (info.control.vif) { 665 struct iwl_mvm_vif *mvmvif = 666 iwl_mvm_vif_from_mac80211(info.control.vif); 667 668 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 669 info.control.vif->type == NL80211_IFTYPE_AP || 670 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 671 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE) 672 sta_id = mvmvif->bcast_sta.sta_id; 673 else 674 sta_id = mvmvif->mcast_sta.sta_id; 675 676 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, 677 hdr->frame_control); 678 if (queue < 0) 679 return -1; 680 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 681 is_multicast_ether_addr(hdr->addr1)) { 682 u8 ap_sta_id = READ_ONCE(mvmvif->ap_sta_id); 683 684 if (ap_sta_id != IWL_MVM_INVALID_STA) 685 sta_id = ap_sta_id; 686 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 687 queue = mvm->snif_queue; 688 sta_id = mvm->snif_sta.sta_id; 689 } 690 } 691 692 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 693 694 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 695 if (!dev_cmd) 696 return -1; 697 698 /* From now on, we cannot access info->control */ 699 iwl_mvm_skb_prepare_status(skb, dev_cmd); 700 701 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 702 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 703 return -1; 704 } 705 706 return 0; 707 } 708 709 #ifdef CONFIG_INET 710 711 static int 712 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 713 netdev_features_t netdev_flags, 714 struct sk_buff_head *mpdus_skb) 715 { 716 struct sk_buff *tmp, *next; 717 struct ieee80211_hdr *hdr = (void *)skb->data; 718 char cb[sizeof(skb->cb)]; 719 u16 i = 0; 720 unsigned int tcp_payload_len; 721 unsigned int mss = skb_shinfo(skb)->gso_size; 722 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 723 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 724 725 skb_shinfo(skb)->gso_size = num_subframes * mss; 726 memcpy(cb, skb->cb, sizeof(cb)); 727 728 next = skb_gso_segment(skb, netdev_flags); 729 skb_shinfo(skb)->gso_size = mss; 730 if (WARN_ON_ONCE(IS_ERR(next))) 731 return -EINVAL; 732 else if (next) 733 consume_skb(skb); 734 735 while (next) { 736 tmp = next; 737 next = tmp->next; 738 739 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 740 /* 741 * Compute the length of all the data added for the A-MSDU. 742 * This will be used to compute the length to write in the TX 743 * command. We have: SNAP + IP + TCP for n -1 subframes and 744 * ETH header for n subframes. 745 */ 746 tcp_payload_len = skb_tail_pointer(tmp) - 747 skb_transport_header(tmp) - 748 tcp_hdrlen(tmp) + tmp->data_len; 749 750 if (ipv4) 751 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 752 753 if (tcp_payload_len > mss) { 754 skb_shinfo(tmp)->gso_size = mss; 755 } else { 756 if (ieee80211_is_data_qos(hdr->frame_control)) { 757 u8 *qc; 758 759 if (ipv4) 760 ip_send_check(ip_hdr(tmp)); 761 762 qc = ieee80211_get_qos_ctl((void *)tmp->data); 763 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 764 } 765 skb_shinfo(tmp)->gso_size = 0; 766 } 767 768 tmp->prev = NULL; 769 tmp->next = NULL; 770 771 __skb_queue_tail(mpdus_skb, tmp); 772 i++; 773 } 774 775 return 0; 776 } 777 778 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 779 struct ieee80211_tx_info *info, 780 struct ieee80211_sta *sta, 781 struct sk_buff_head *mpdus_skb) 782 { 783 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 784 struct ieee80211_hdr *hdr = (void *)skb->data; 785 unsigned int mss = skb_shinfo(skb)->gso_size; 786 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 787 u16 snap_ip_tcp, pad; 788 unsigned int dbg_max_amsdu_len; 789 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 790 u8 tid, txf; 791 792 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 793 tcp_hdrlen(skb); 794 795 dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len); 796 797 if (!mvmsta->max_amsdu_len || 798 !ieee80211_is_data_qos(hdr->frame_control) || 799 (!mvmsta->amsdu_enabled && !dbg_max_amsdu_len)) 800 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 801 802 /* 803 * Do not build AMSDU for IPv6 with extension headers. 804 * ask stack to segment and checkum the generated MPDUs for us. 805 */ 806 if (skb->protocol == htons(ETH_P_IPV6) && 807 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 808 IPPROTO_TCP) { 809 netdev_flags &= ~NETIF_F_CSUM_MASK; 810 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 811 } 812 813 tid = ieee80211_get_tid(hdr); 814 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 815 return -EINVAL; 816 817 /* 818 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 819 * during an BA session. 820 */ 821 if (info->flags & IEEE80211_TX_CTL_AMPDU && 822 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) 823 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 824 825 if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) || 826 !(mvmsta->amsdu_enabled & BIT(tid))) 827 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 828 829 max_amsdu_len = mvmsta->max_amsdu_len; 830 831 /* the Tx FIFO to which this A-MSDU will be routed */ 832 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, tid_to_mac80211_ac[tid]); 833 834 /* 835 * Don't send an AMSDU that will be longer than the TXF. 836 * Add a security margin of 256 for the TX command + headers. 837 * We also want to have the start of the next packet inside the 838 * fifo to be able to send bursts. 839 */ 840 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 841 mvm->fwrt.smem_cfg.lmac[0].txfifo_size[txf] - 842 256); 843 844 if (unlikely(dbg_max_amsdu_len)) 845 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 846 dbg_max_amsdu_len); 847 848 /* 849 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 850 * supported. This is a spec requirement (IEEE 802.11-2015 851 * section 8.7.3 NOTE 3). 852 */ 853 if (info->flags & IEEE80211_TX_CTL_AMPDU && 854 !sta->vht_cap.vht_supported) 855 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 856 857 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 858 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 859 pad = (4 - subf_len) & 0x3; 860 861 /* 862 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 863 * N * subf_len + (N - 1) * pad. 864 */ 865 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 866 867 if (sta->max_amsdu_subframes && 868 num_subframes > sta->max_amsdu_subframes) 869 num_subframes = sta->max_amsdu_subframes; 870 871 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 872 tcp_hdrlen(skb) + skb->data_len; 873 874 /* 875 * Make sure we have enough TBs for the A-MSDU: 876 * 2 for each subframe 877 * 1 more for each fragment 878 * 1 more for the potential data in the header 879 */ 880 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 881 mvm->trans->max_skb_frags) 882 num_subframes = 1; 883 884 if (num_subframes > 1) 885 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 886 887 /* This skb fits in one single A-MSDU */ 888 if (num_subframes * mss >= tcp_payload_len) { 889 __skb_queue_tail(mpdus_skb, skb); 890 return 0; 891 } 892 893 /* 894 * Trick the segmentation function to make it 895 * create SKBs that can fit into one A-MSDU. 896 */ 897 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 898 mpdus_skb); 899 } 900 #else /* CONFIG_INET */ 901 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 902 struct ieee80211_tx_info *info, 903 struct ieee80211_sta *sta, 904 struct sk_buff_head *mpdus_skb) 905 { 906 /* Impossible to get TSO with CONFIG_INET */ 907 WARN_ON(1); 908 909 return -1; 910 } 911 #endif 912 913 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, 914 struct iwl_mvm_sta *mvm_sta, u8 tid, 915 struct sk_buff *skb) 916 { 917 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 918 u8 mac_queue = info->hw_queue; 919 struct sk_buff_head *deferred_tx_frames; 920 921 lockdep_assert_held(&mvm_sta->lock); 922 923 mvm_sta->deferred_traffic_tid_map |= BIT(tid); 924 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); 925 926 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; 927 928 skb_queue_tail(deferred_tx_frames, skb); 929 930 /* 931 * The first deferred frame should've stopped the MAC queues, so we 932 * should never get a second deferred frame for the RA/TID. 933 * In case of GSO the first packet may have been split, so don't warn. 934 */ 935 if (skb_queue_len(deferred_tx_frames) == 1) { 936 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); 937 schedule_work(&mvm->add_stream_wk); 938 } 939 } 940 941 /* Check if there are any timed-out TIDs on a given shared TXQ */ 942 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 943 { 944 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 945 unsigned long now = jiffies; 946 int tid; 947 948 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 949 return false; 950 951 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 952 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 953 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 954 return true; 955 } 956 957 return false; 958 } 959 960 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 961 struct iwl_mvm_sta *mvmsta, 962 int airtime) 963 { 964 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 965 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac]; 966 967 if (mvm->tcm.paused) 968 return; 969 970 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 971 schedule_delayed_work(&mvm->tcm.work, 0); 972 973 mdata->tx.airtime += airtime; 974 } 975 976 static void iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 977 struct iwl_mvm_sta *mvmsta, int tid) 978 { 979 u32 ac = tid_to_mac80211_ac[tid]; 980 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 981 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac]; 982 983 mdata->tx.pkts[ac]++; 984 } 985 986 /* 987 * Sets the fields in the Tx cmd that are crypto related 988 */ 989 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 990 struct ieee80211_tx_info *info, 991 struct ieee80211_sta *sta) 992 { 993 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 994 struct iwl_mvm_sta *mvmsta; 995 struct iwl_device_cmd *dev_cmd; 996 __le16 fc; 997 u16 seq_number = 0; 998 u8 tid = IWL_MAX_TID_COUNT; 999 u16 txq_id = info->hw_queue; 1000 bool is_ampdu = false; 1001 int hdrlen; 1002 1003 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1004 fc = hdr->frame_control; 1005 hdrlen = ieee80211_hdrlen(fc); 1006 1007 if (WARN_ON_ONCE(!mvmsta)) 1008 return -1; 1009 1010 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1011 return -1; 1012 1013 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 1014 sta, mvmsta->sta_id); 1015 if (!dev_cmd) 1016 goto drop; 1017 1018 /* 1019 * we handle that entirely ourselves -- for uAPSD the firmware 1020 * will always send a notification, and for PS-Poll responses 1021 * we'll notify mac80211 when getting frame status 1022 */ 1023 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1024 1025 spin_lock(&mvmsta->lock); 1026 1027 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1028 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 1029 * assignment of MGMT TID 1030 */ 1031 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1032 tid = ieee80211_get_tid(hdr); 1033 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 1034 goto drop_unlock_sta; 1035 1036 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1037 if (WARN_ON_ONCE(is_ampdu && 1038 mvmsta->tid_data[tid].state != IWL_AGG_ON)) 1039 goto drop_unlock_sta; 1040 1041 seq_number = mvmsta->tid_data[tid].seq_number; 1042 seq_number &= IEEE80211_SCTL_SEQ; 1043 1044 if (!iwl_mvm_has_new_tx_api(mvm)) { 1045 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1046 1047 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1048 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1049 /* update the tx_cmd hdr as it was already copied */ 1050 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1051 } 1052 } 1053 1054 txq_id = mvmsta->tid_data[tid].txq_id; 1055 1056 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1057 1058 /* Check if TXQ needs to be allocated or re-activated */ 1059 if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE || 1060 !mvmsta->tid_data[tid].is_tid_active)) { 1061 /* If TXQ needs to be allocated... */ 1062 if (txq_id == IWL_MVM_INVALID_QUEUE) { 1063 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); 1064 1065 /* 1066 * The frame is now deferred, and the worker scheduled 1067 * will re-allocate it, so we can free it for now. 1068 */ 1069 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1070 spin_unlock(&mvmsta->lock); 1071 return 0; 1072 } 1073 1074 /* queue should always be active in new TX path */ 1075 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1076 1077 /* If we are here - TXQ exists and needs to be re-activated */ 1078 spin_lock(&mvm->queue_info_lock); 1079 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1080 mvmsta->tid_data[tid].is_tid_active = true; 1081 spin_unlock(&mvm->queue_info_lock); 1082 1083 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n", 1084 txq_id); 1085 } 1086 1087 if (!iwl_mvm_has_new_tx_api(mvm)) { 1088 /* Keep track of the time of the last frame for this RA/TID */ 1089 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1090 1091 /* 1092 * If we have timed-out TIDs - schedule the worker that will 1093 * reconfig the queues and update them 1094 * 1095 * Note that the mvm->queue_info_lock isn't being taken here in 1096 * order to not serialize the TX flow. This isn't dangerous 1097 * because scheduling mvm->add_stream_wk can't ruin the state, 1098 * and if we DON'T schedule it due to some race condition then 1099 * next TX we get here we will. 1100 */ 1101 if (unlikely(mvm->queue_info[txq_id].status == 1102 IWL_MVM_QUEUE_SHARED && 1103 iwl_mvm_txq_should_update(mvm, txq_id))) 1104 schedule_work(&mvm->add_stream_wk); 1105 } 1106 1107 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 1108 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 1109 1110 /* From now on, we cannot access info->control */ 1111 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1112 1113 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1114 goto drop_unlock_sta; 1115 1116 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1117 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1118 1119 spin_unlock(&mvmsta->lock); 1120 1121 iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid); 1122 1123 return 0; 1124 1125 drop_unlock_sta: 1126 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1127 spin_unlock(&mvmsta->lock); 1128 drop: 1129 return -1; 1130 } 1131 1132 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 1133 struct ieee80211_sta *sta) 1134 { 1135 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1136 struct ieee80211_tx_info info; 1137 struct sk_buff_head mpdus_skbs; 1138 unsigned int payload_len; 1139 int ret; 1140 1141 if (WARN_ON_ONCE(!mvmsta)) 1142 return -1; 1143 1144 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1145 return -1; 1146 1147 memcpy(&info, skb->cb, sizeof(info)); 1148 1149 if (!skb_is_gso(skb)) 1150 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1151 1152 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1153 tcp_hdrlen(skb) + skb->data_len; 1154 1155 if (payload_len <= skb_shinfo(skb)->gso_size) 1156 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1157 1158 __skb_queue_head_init(&mpdus_skbs); 1159 1160 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1161 if (ret) 1162 return ret; 1163 1164 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1165 return ret; 1166 1167 while (!skb_queue_empty(&mpdus_skbs)) { 1168 skb = __skb_dequeue(&mpdus_skbs); 1169 1170 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1171 if (ret) { 1172 __skb_queue_purge(&mpdus_skbs); 1173 return ret; 1174 } 1175 } 1176 1177 return 0; 1178 } 1179 1180 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1181 struct ieee80211_sta *sta, u8 tid) 1182 { 1183 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1184 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1185 struct ieee80211_vif *vif = mvmsta->vif; 1186 u16 normalized_ssn; 1187 1188 lockdep_assert_held(&mvmsta->lock); 1189 1190 if ((tid_data->state == IWL_AGG_ON || 1191 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1192 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1193 /* 1194 * Now that this aggregation or DQA queue is empty tell 1195 * mac80211 so it knows we no longer have frames buffered for 1196 * the station on this TID (for the TIM bitmap calculation.) 1197 */ 1198 ieee80211_sta_set_buffered(sta, tid, false); 1199 } 1200 1201 /* 1202 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1203 * to align the wrap around of ssn so we compare relevant values. 1204 */ 1205 normalized_ssn = tid_data->ssn; 1206 if (mvm->trans->cfg->gen2) 1207 normalized_ssn &= 0xff; 1208 1209 if (normalized_ssn != tid_data->next_reclaimed) 1210 return; 1211 1212 switch (tid_data->state) { 1213 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1214 IWL_DEBUG_TX_QUEUES(mvm, 1215 "Can continue addBA flow ssn = next_recl = %d\n", 1216 tid_data->next_reclaimed); 1217 tid_data->state = IWL_AGG_STARTING; 1218 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1219 break; 1220 1221 case IWL_EMPTYING_HW_QUEUE_DELBA: 1222 IWL_DEBUG_TX_QUEUES(mvm, 1223 "Can continue DELBA flow ssn = next_recl = %d\n", 1224 tid_data->next_reclaimed); 1225 tid_data->state = IWL_AGG_OFF; 1226 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1227 break; 1228 1229 default: 1230 break; 1231 } 1232 } 1233 1234 #ifdef CONFIG_IWLWIFI_DEBUG 1235 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1236 { 1237 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1238 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1239 1240 switch (status & TX_STATUS_MSK) { 1241 case TX_STATUS_SUCCESS: 1242 return "SUCCESS"; 1243 TX_STATUS_POSTPONE(DELAY); 1244 TX_STATUS_POSTPONE(FEW_BYTES); 1245 TX_STATUS_POSTPONE(BT_PRIO); 1246 TX_STATUS_POSTPONE(QUIET_PERIOD); 1247 TX_STATUS_POSTPONE(CALC_TTAK); 1248 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1249 TX_STATUS_FAIL(SHORT_LIMIT); 1250 TX_STATUS_FAIL(LONG_LIMIT); 1251 TX_STATUS_FAIL(UNDERRUN); 1252 TX_STATUS_FAIL(DRAIN_FLOW); 1253 TX_STATUS_FAIL(RFKILL_FLUSH); 1254 TX_STATUS_FAIL(LIFE_EXPIRE); 1255 TX_STATUS_FAIL(DEST_PS); 1256 TX_STATUS_FAIL(HOST_ABORTED); 1257 TX_STATUS_FAIL(BT_RETRY); 1258 TX_STATUS_FAIL(STA_INVALID); 1259 TX_STATUS_FAIL(FRAG_DROPPED); 1260 TX_STATUS_FAIL(TID_DISABLE); 1261 TX_STATUS_FAIL(FIFO_FLUSHED); 1262 TX_STATUS_FAIL(SMALL_CF_POLL); 1263 TX_STATUS_FAIL(FW_DROP); 1264 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1265 } 1266 1267 return "UNKNOWN"; 1268 1269 #undef TX_STATUS_FAIL 1270 #undef TX_STATUS_POSTPONE 1271 } 1272 #endif /* CONFIG_IWLWIFI_DEBUG */ 1273 1274 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1275 enum nl80211_band band, 1276 struct ieee80211_tx_rate *r) 1277 { 1278 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1279 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1280 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1281 case RATE_MCS_CHAN_WIDTH_20: 1282 break; 1283 case RATE_MCS_CHAN_WIDTH_40: 1284 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1285 break; 1286 case RATE_MCS_CHAN_WIDTH_80: 1287 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1288 break; 1289 case RATE_MCS_CHAN_WIDTH_160: 1290 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1291 break; 1292 } 1293 if (rate_n_flags & RATE_MCS_SGI_MSK) 1294 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1295 if (rate_n_flags & RATE_MCS_HT_MSK) { 1296 r->flags |= IEEE80211_TX_RC_MCS; 1297 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1298 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1299 ieee80211_rate_set_vht( 1300 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1301 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1302 RATE_VHT_MCS_NSS_POS) + 1); 1303 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1304 } else { 1305 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1306 band); 1307 } 1308 } 1309 1310 /** 1311 * translate ucode response to mac80211 tx status control values 1312 */ 1313 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1314 struct ieee80211_tx_info *info) 1315 { 1316 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1317 1318 info->status.antenna = 1319 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1320 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1321 } 1322 1323 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1324 u32 status) 1325 { 1326 struct iwl_fw_dbg_trigger_tlv *trig; 1327 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1328 int i; 1329 1330 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) 1331 return; 1332 1333 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); 1334 status_trig = (void *)trig->data; 1335 1336 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig)) 1337 return; 1338 1339 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1340 /* don't collect on status 0 */ 1341 if (!status_trig->statuses[i].status) 1342 break; 1343 1344 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1345 continue; 1346 1347 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1348 "Tx status %d was received", 1349 status & TX_STATUS_MSK); 1350 break; 1351 } 1352 } 1353 1354 /** 1355 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1356 * @tx_resp: the Tx response from the fw (agg or non-agg) 1357 * 1358 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1359 * it can't know that everything will go well until the end of the AMPDU, it 1360 * can't know in advance the number of MPDUs that will be sent in the current 1361 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1362 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1363 * of the batch. This is why the SSN of the SCD is written at the end of the 1364 * whole struct at a variable offset. This function knows how to cope with the 1365 * variable offset and returns the SSN of the SCD. 1366 */ 1367 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1368 struct iwl_mvm_tx_resp *tx_resp) 1369 { 1370 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1371 tx_resp->frame_count) & 0xfff; 1372 } 1373 1374 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1375 struct iwl_rx_packet *pkt) 1376 { 1377 struct ieee80211_sta *sta; 1378 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1379 int txq_id = SEQ_TO_QUEUE(sequence); 1380 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1381 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1382 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1383 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1384 struct agg_tx_status *agg_status = 1385 iwl_mvm_get_agg_status(mvm, tx_resp); 1386 u32 status = le16_to_cpu(agg_status->status); 1387 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1388 struct iwl_mvm_sta *mvmsta; 1389 struct sk_buff_head skbs; 1390 u8 skb_freed = 0; 1391 u8 lq_color; 1392 u16 next_reclaimed, seq_ctl; 1393 bool is_ndp = false; 1394 1395 __skb_queue_head_init(&skbs); 1396 1397 if (iwl_mvm_has_new_tx_api(mvm)) 1398 txq_id = le16_to_cpu(tx_resp->tx_queue); 1399 1400 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1401 1402 /* we can free until ssn % q.n_bd not inclusive */ 1403 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1404 1405 while (!skb_queue_empty(&skbs)) { 1406 struct sk_buff *skb = __skb_dequeue(&skbs); 1407 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1408 bool flushed = false; 1409 1410 skb_freed++; 1411 1412 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1413 1414 memset(&info->status, 0, sizeof(info->status)); 1415 1416 /* inform mac80211 about what happened with the frame */ 1417 switch (status & TX_STATUS_MSK) { 1418 case TX_STATUS_SUCCESS: 1419 case TX_STATUS_DIRECT_DONE: 1420 info->flags |= IEEE80211_TX_STAT_ACK; 1421 break; 1422 case TX_STATUS_FAIL_FIFO_FLUSHED: 1423 case TX_STATUS_FAIL_DRAIN_FLOW: 1424 flushed = true; 1425 break; 1426 case TX_STATUS_FAIL_DEST_PS: 1427 /* the FW should have stopped the queue and not 1428 * return this status 1429 */ 1430 WARN_ON(1); 1431 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1432 break; 1433 default: 1434 break; 1435 } 1436 1437 iwl_mvm_tx_status_check_trigger(mvm, status); 1438 1439 info->status.rates[0].count = tx_resp->failure_frame + 1; 1440 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1441 info); 1442 info->status.status_driver_data[1] = 1443 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1444 1445 /* Single frame failure in an AMPDU queue => send BAR */ 1446 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1447 !(info->flags & IEEE80211_TX_STAT_ACK) && 1448 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1449 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1450 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1451 1452 /* W/A FW bug: seq_ctl is wrong when the status isn't success */ 1453 if (status != TX_STATUS_SUCCESS) { 1454 struct ieee80211_hdr *hdr = (void *)skb->data; 1455 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1456 } 1457 1458 if (unlikely(!seq_ctl)) { 1459 struct ieee80211_hdr *hdr = (void *)skb->data; 1460 1461 /* 1462 * If it is an NDP, we can't update next_reclaim since 1463 * its sequence control is 0. Note that for that same 1464 * reason, NDPs are never sent to A-MPDU'able queues 1465 * so that we can never have more than one freed frame 1466 * for a single Tx resonse (see WARN_ON below). 1467 */ 1468 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1469 is_ndp = true; 1470 } 1471 1472 /* 1473 * TODO: this is not accurate if we are freeing more than one 1474 * packet. 1475 */ 1476 info->status.tx_time = 1477 le16_to_cpu(tx_resp->wireless_media_time); 1478 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1479 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1480 info->status.status_driver_data[0] = 1481 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1482 1483 ieee80211_tx_status(mvm->hw, skb); 1484 } 1485 1486 /* This is an aggregation queue or might become one, so we use 1487 * the ssn since: ssn = wifi seq_num % 256. 1488 * The seq_ctl is the sequence control of the packet to which 1489 * this Tx response relates. But if there is a hole in the 1490 * bitmap of the BA we received, this Tx response may allow to 1491 * reclaim the hole and all the subsequent packets that were 1492 * already acked. In that case, seq_ctl != ssn, and the next 1493 * packet to be reclaimed will be ssn and not seq_ctl. In that 1494 * case, several packets will be reclaimed even if 1495 * frame_count = 1. 1496 * 1497 * The ssn is the index (% 256) of the latest packet that has 1498 * treated (acked / dropped) + 1. 1499 */ 1500 next_reclaimed = ssn; 1501 1502 IWL_DEBUG_TX_REPLY(mvm, 1503 "TXQ %d status %s (0x%08x)\n", 1504 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1505 1506 IWL_DEBUG_TX_REPLY(mvm, 1507 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1508 le32_to_cpu(tx_resp->initial_rate), 1509 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1510 ssn, next_reclaimed, seq_ctl); 1511 1512 rcu_read_lock(); 1513 1514 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1515 /* 1516 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1517 * the firmware while we still have packets for it in the Tx queues. 1518 */ 1519 if (WARN_ON_ONCE(!sta)) 1520 goto out; 1521 1522 if (!IS_ERR(sta)) { 1523 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1524 1525 iwl_mvm_tx_airtime(mvm, mvmsta, 1526 le16_to_cpu(tx_resp->wireless_media_time)); 1527 1528 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) { 1529 struct iwl_mvm_tid_data *tid_data = 1530 &mvmsta->tid_data[tid]; 1531 bool send_eosp_ndp = false; 1532 1533 spin_lock_bh(&mvmsta->lock); 1534 1535 if (!is_ndp) { 1536 tid_data->next_reclaimed = next_reclaimed; 1537 IWL_DEBUG_TX_REPLY(mvm, 1538 "Next reclaimed packet:%d\n", 1539 next_reclaimed); 1540 } else { 1541 IWL_DEBUG_TX_REPLY(mvm, 1542 "NDP - don't update next_reclaimed\n"); 1543 } 1544 1545 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1546 1547 if (mvmsta->sleep_tx_count) { 1548 mvmsta->sleep_tx_count--; 1549 if (mvmsta->sleep_tx_count && 1550 !iwl_mvm_tid_queued(mvm, tid_data)) { 1551 /* 1552 * The number of frames in the queue 1553 * dropped to 0 even if we sent less 1554 * frames than we thought we had on the 1555 * Tx queue. 1556 * This means we had holes in the BA 1557 * window that we just filled, ask 1558 * mac80211 to send EOSP since the 1559 * firmware won't know how to do that. 1560 * Send NDP and the firmware will send 1561 * EOSP notification that will trigger 1562 * a call to ieee80211_sta_eosp(). 1563 */ 1564 send_eosp_ndp = true; 1565 } 1566 } 1567 1568 spin_unlock_bh(&mvmsta->lock); 1569 if (send_eosp_ndp) { 1570 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1571 IEEE80211_FRAME_RELEASE_UAPSD, 1572 1, tid, false, false); 1573 mvmsta->sleep_tx_count = 0; 1574 ieee80211_send_eosp_nullfunc(sta, tid); 1575 } 1576 } 1577 1578 if (mvmsta->next_status_eosp) { 1579 mvmsta->next_status_eosp = false; 1580 ieee80211_sta_eosp(sta); 1581 } 1582 } else { 1583 mvmsta = NULL; 1584 } 1585 1586 out: 1587 rcu_read_unlock(); 1588 } 1589 1590 #ifdef CONFIG_IWLWIFI_DEBUG 1591 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1592 static const char *iwl_get_agg_tx_status(u16 status) 1593 { 1594 switch (status & AGG_TX_STATE_STATUS_MSK) { 1595 AGG_TX_STATE_(TRANSMITTED); 1596 AGG_TX_STATE_(UNDERRUN); 1597 AGG_TX_STATE_(BT_PRIO); 1598 AGG_TX_STATE_(FEW_BYTES); 1599 AGG_TX_STATE_(ABORT); 1600 AGG_TX_STATE_(TX_ON_AIR_DROP); 1601 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1602 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1603 AGG_TX_STATE_(SCD_QUERY); 1604 AGG_TX_STATE_(TEST_BAD_CRC32); 1605 AGG_TX_STATE_(RESPONSE); 1606 AGG_TX_STATE_(DUMP_TX); 1607 AGG_TX_STATE_(DELAY_TX); 1608 } 1609 1610 return "UNKNOWN"; 1611 } 1612 1613 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1614 struct iwl_rx_packet *pkt) 1615 { 1616 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1617 struct agg_tx_status *frame_status = 1618 iwl_mvm_get_agg_status(mvm, tx_resp); 1619 int i; 1620 1621 for (i = 0; i < tx_resp->frame_count; i++) { 1622 u16 fstatus = le16_to_cpu(frame_status[i].status); 1623 1624 IWL_DEBUG_TX_REPLY(mvm, 1625 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1626 iwl_get_agg_tx_status(fstatus), 1627 fstatus & AGG_TX_STATE_STATUS_MSK, 1628 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1629 AGG_TX_STATE_TRY_CNT_POS, 1630 le16_to_cpu(frame_status[i].sequence)); 1631 } 1632 } 1633 #else 1634 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1635 struct iwl_rx_packet *pkt) 1636 {} 1637 #endif /* CONFIG_IWLWIFI_DEBUG */ 1638 1639 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1640 struct iwl_rx_packet *pkt) 1641 { 1642 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1643 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1644 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1645 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1646 struct iwl_mvm_sta *mvmsta; 1647 int queue = SEQ_TO_QUEUE(sequence); 1648 1649 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1650 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1651 return; 1652 1653 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) 1654 return; 1655 1656 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1657 1658 rcu_read_lock(); 1659 1660 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1661 1662 if (!WARN_ON_ONCE(!mvmsta)) { 1663 mvmsta->tid_data[tid].rate_n_flags = 1664 le32_to_cpu(tx_resp->initial_rate); 1665 mvmsta->tid_data[tid].tx_time = 1666 le16_to_cpu(tx_resp->wireless_media_time); 1667 mvmsta->tid_data[tid].lq_color = 1668 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1669 iwl_mvm_tx_airtime(mvm, mvmsta, 1670 le16_to_cpu(tx_resp->wireless_media_time)); 1671 } 1672 1673 rcu_read_unlock(); 1674 } 1675 1676 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1677 { 1678 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1679 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1680 1681 if (tx_resp->frame_count == 1) 1682 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1683 else 1684 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1685 } 1686 1687 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1688 int txq, int index, 1689 struct ieee80211_tx_info *ba_info, u32 rate) 1690 { 1691 struct sk_buff_head reclaimed_skbs; 1692 struct iwl_mvm_tid_data *tid_data; 1693 struct ieee80211_sta *sta; 1694 struct iwl_mvm_sta *mvmsta; 1695 struct sk_buff *skb; 1696 int freed; 1697 1698 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1699 tid > IWL_MAX_TID_COUNT, 1700 "sta_id %d tid %d", sta_id, tid)) 1701 return; 1702 1703 rcu_read_lock(); 1704 1705 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1706 1707 /* Reclaiming frames for a station that has been deleted ? */ 1708 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1709 rcu_read_unlock(); 1710 return; 1711 } 1712 1713 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1714 tid_data = &mvmsta->tid_data[tid]; 1715 1716 if (tid_data->txq_id != txq) { 1717 IWL_ERR(mvm, 1718 "invalid BA notification: Q %d, tid %d\n", 1719 tid_data->txq_id, tid); 1720 rcu_read_unlock(); 1721 return; 1722 } 1723 1724 spin_lock_bh(&mvmsta->lock); 1725 1726 __skb_queue_head_init(&reclaimed_skbs); 1727 1728 /* 1729 * Release all TFDs before the SSN, i.e. all TFDs in front of 1730 * block-ack window (we assume that they've been successfully 1731 * transmitted ... if not, it's too late anyway). 1732 */ 1733 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1734 1735 tid_data->next_reclaimed = index; 1736 1737 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1738 1739 freed = 0; 1740 1741 /* pack lq color from tid_data along the reduced txp */ 1742 ba_info->status.status_driver_data[0] = 1743 RS_DRV_DATA_PACK(tid_data->lq_color, 1744 ba_info->status.status_driver_data[0]); 1745 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1746 1747 skb_queue_walk(&reclaimed_skbs, skb) { 1748 struct ieee80211_hdr *hdr = (void *)skb->data; 1749 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1750 1751 if (ieee80211_is_data_qos(hdr->frame_control)) 1752 freed++; 1753 else 1754 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1755 1756 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1757 1758 memset(&info->status, 0, sizeof(info->status)); 1759 /* Packet was transmitted successfully, failures come as single 1760 * frames because before failing a frame the firmware transmits 1761 * it without aggregation at least once. 1762 */ 1763 info->flags |= IEEE80211_TX_STAT_ACK; 1764 1765 /* this is the first skb we deliver in this batch */ 1766 /* put the rate scaling data there */ 1767 if (freed == 1) { 1768 info->flags |= IEEE80211_TX_STAT_AMPDU; 1769 memcpy(&info->status, &ba_info->status, 1770 sizeof(ba_info->status)); 1771 iwl_mvm_hwrate_to_tx_status(rate, info); 1772 } 1773 } 1774 1775 spin_unlock_bh(&mvmsta->lock); 1776 1777 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1778 * possible (i.e. first MPDU in the aggregation wasn't acked) 1779 * Still it's important to update RS about sent vs. acked. 1780 */ 1781 if (skb_queue_empty(&reclaimed_skbs)) { 1782 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1783 1784 if (mvmsta->vif) 1785 chanctx_conf = 1786 rcu_dereference(mvmsta->vif->chanctx_conf); 1787 1788 if (WARN_ON_ONCE(!chanctx_conf)) 1789 goto out; 1790 1791 ba_info->band = chanctx_conf->def.chan->band; 1792 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1793 1794 if (!iwl_mvm_has_tlc_offload(mvm)) { 1795 IWL_DEBUG_TX_REPLY(mvm, 1796 "No reclaim. Update rs directly\n"); 1797 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1798 } 1799 } 1800 1801 out: 1802 rcu_read_unlock(); 1803 1804 while (!skb_queue_empty(&reclaimed_skbs)) { 1805 skb = __skb_dequeue(&reclaimed_skbs); 1806 ieee80211_tx_status(mvm->hw, skb); 1807 } 1808 } 1809 1810 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1811 { 1812 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1813 int sta_id, tid, txq, index; 1814 struct ieee80211_tx_info ba_info = {}; 1815 struct iwl_mvm_ba_notif *ba_notif; 1816 struct iwl_mvm_tid_data *tid_data; 1817 struct iwl_mvm_sta *mvmsta; 1818 1819 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1820 1821 if (iwl_mvm_has_new_tx_api(mvm)) { 1822 struct iwl_mvm_compressed_ba_notif *ba_res = 1823 (void *)pkt->data; 1824 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 1825 int i; 1826 1827 sta_id = ba_res->sta_id; 1828 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1829 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1830 ba_info.status.tx_time = 1831 (u16)le32_to_cpu(ba_res->wireless_time); 1832 ba_info.status.status_driver_data[0] = 1833 (void *)(uintptr_t)ba_res->reduced_txp; 1834 1835 if (!le16_to_cpu(ba_res->tfd_cnt)) 1836 goto out; 1837 1838 rcu_read_lock(); 1839 1840 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1841 if (!mvmsta) 1842 goto out_unlock; 1843 1844 /* Free per TID */ 1845 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { 1846 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1847 &ba_res->tfd[i]; 1848 1849 tid = ba_tfd->tid; 1850 if (tid == IWL_MGMT_TID) 1851 tid = IWL_MAX_TID_COUNT; 1852 1853 mvmsta->tid_data[i].lq_color = lq_color; 1854 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 1855 (int)(le16_to_cpu(ba_tfd->q_num)), 1856 le16_to_cpu(ba_tfd->tfd_index), 1857 &ba_info, 1858 le32_to_cpu(ba_res->tx_rate)); 1859 } 1860 1861 iwl_mvm_tx_airtime(mvm, mvmsta, 1862 le32_to_cpu(ba_res->wireless_time)); 1863 out_unlock: 1864 rcu_read_unlock(); 1865 out: 1866 IWL_DEBUG_TX_REPLY(mvm, 1867 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1868 sta_id, le32_to_cpu(ba_res->flags), 1869 le16_to_cpu(ba_res->txed), 1870 le16_to_cpu(ba_res->done)); 1871 return; 1872 } 1873 1874 ba_notif = (void *)pkt->data; 1875 sta_id = ba_notif->sta_id; 1876 tid = ba_notif->tid; 1877 /* "flow" corresponds to Tx queue */ 1878 txq = le16_to_cpu(ba_notif->scd_flow); 1879 /* "ssn" is start of block-ack Tx window, corresponds to index 1880 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1881 index = le16_to_cpu(ba_notif->scd_ssn); 1882 1883 rcu_read_lock(); 1884 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1885 if (WARN_ON_ONCE(!mvmsta)) { 1886 rcu_read_unlock(); 1887 return; 1888 } 1889 1890 tid_data = &mvmsta->tid_data[tid]; 1891 1892 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1893 ba_info.status.ampdu_len = ba_notif->txed; 1894 ba_info.status.tx_time = tid_data->tx_time; 1895 ba_info.status.status_driver_data[0] = 1896 (void *)(uintptr_t)ba_notif->reduced_txp; 1897 1898 rcu_read_unlock(); 1899 1900 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1901 tid_data->rate_n_flags); 1902 1903 IWL_DEBUG_TX_REPLY(mvm, 1904 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1905 ba_notif->sta_addr, ba_notif->sta_id); 1906 1907 IWL_DEBUG_TX_REPLY(mvm, 1908 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1909 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1910 le64_to_cpu(ba_notif->bitmap), txq, index, 1911 ba_notif->txed, ba_notif->txed_2_done); 1912 1913 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1914 ba_notif->reduced_txp); 1915 } 1916 1917 /* 1918 * Note that there are transports that buffer frames before they reach 1919 * the firmware. This means that after flush_tx_path is called, the 1920 * queue might not be empty. The race-free way to handle this is to: 1921 * 1) set the station as draining 1922 * 2) flush the Tx path 1923 * 3) wait for the transport queues to be empty 1924 */ 1925 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 1926 { 1927 int ret; 1928 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 1929 .queues_ctl = cpu_to_le32(tfd_msk), 1930 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 1931 }; 1932 1933 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1934 1935 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1936 sizeof(flush_cmd), &flush_cmd); 1937 if (ret) 1938 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1939 return ret; 1940 } 1941 1942 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, 1943 u16 tids, u32 flags) 1944 { 1945 int ret; 1946 struct iwl_tx_path_flush_cmd flush_cmd = { 1947 .sta_id = cpu_to_le32(sta_id), 1948 .tid_mask = cpu_to_le16(tids), 1949 }; 1950 1951 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 1952 1953 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1954 sizeof(flush_cmd), &flush_cmd); 1955 if (ret) 1956 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1957 return ret; 1958 } 1959 1960 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags) 1961 { 1962 struct iwl_mvm_int_sta *int_sta = sta; 1963 struct iwl_mvm_sta *mvm_sta = sta; 1964 1965 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != 1966 offsetof(struct iwl_mvm_sta, sta_id)); 1967 1968 if (iwl_mvm_has_new_tx_api(mvm)) 1969 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 1970 0xff | BIT(IWL_MGMT_TID), flags); 1971 1972 if (internal) 1973 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 1974 flags); 1975 1976 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags); 1977 } 1978