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 #include "fw-dbg.h" 78 79 static void 80 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 81 u16 tid, u16 ssn) 82 { 83 struct iwl_fw_dbg_trigger_tlv *trig; 84 struct iwl_fw_dbg_trigger_ba *ba_trig; 85 86 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA)) 87 return; 88 89 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA); 90 ba_trig = (void *)trig->data; 91 92 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) 93 return; 94 95 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 96 return; 97 98 iwl_mvm_fw_dbg_collect_trig(mvm, trig, 99 "BAR sent to %pM, tid %d, ssn %d", 100 addr, tid, ssn); 101 } 102 103 #define OPT_HDR(type, skb, off) \ 104 (type *)(skb_network_header(skb) + (off)) 105 106 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 107 struct ieee80211_hdr *hdr, 108 struct ieee80211_tx_info *info) 109 { 110 u16 offload_assist = 0; 111 #if IS_ENABLED(CONFIG_INET) 112 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 113 u8 protocol = 0; 114 115 /* 116 * Do not compute checksum if already computed or if transport will 117 * compute it 118 */ 119 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD) 120 goto out; 121 122 /* We do not expect to be requested to csum stuff we do not support */ 123 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 124 (skb->protocol != htons(ETH_P_IP) && 125 skb->protocol != htons(ETH_P_IPV6)), 126 "No support for requested checksum\n")) { 127 skb_checksum_help(skb); 128 goto out; 129 } 130 131 if (skb->protocol == htons(ETH_P_IP)) { 132 protocol = ip_hdr(skb)->protocol; 133 } else { 134 #if IS_ENABLED(CONFIG_IPV6) 135 struct ipv6hdr *ipv6h = 136 (struct ipv6hdr *)skb_network_header(skb); 137 unsigned int off = sizeof(*ipv6h); 138 139 protocol = ipv6h->nexthdr; 140 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 141 struct ipv6_opt_hdr *hp; 142 143 /* only supported extension headers */ 144 if (protocol != NEXTHDR_ROUTING && 145 protocol != NEXTHDR_HOP && 146 protocol != NEXTHDR_DEST) { 147 skb_checksum_help(skb); 148 goto out; 149 } 150 151 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 152 protocol = hp->nexthdr; 153 off += ipv6_optlen(hp); 154 } 155 /* if we get here - protocol now should be TCP/UDP */ 156 #endif 157 } 158 159 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 160 WARN_ON_ONCE(1); 161 skb_checksum_help(skb); 162 goto out; 163 } 164 165 /* enable L4 csum */ 166 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 167 168 /* 169 * Set offset to IP header (snap). 170 * We don't support tunneling so no need to take care of inner header. 171 * Size is in words. 172 */ 173 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 174 175 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 176 if (skb->protocol == htons(ETH_P_IP) && 177 (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) { 178 ip_hdr(skb)->check = 0; 179 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 180 } 181 182 /* reset UDP/TCP header csum */ 183 if (protocol == IPPROTO_TCP) 184 tcp_hdr(skb)->check = 0; 185 else 186 udp_hdr(skb)->check = 0; 187 188 /* mac header len should include IV, size is in words */ 189 if (info->control.hw_key) 190 mh_len += info->control.hw_key->iv_len; 191 mh_len /= 2; 192 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 193 194 out: 195 #endif 196 return offload_assist; 197 } 198 199 /* 200 * Sets most of the Tx cmd's fields 201 */ 202 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 203 struct iwl_tx_cmd *tx_cmd, 204 struct ieee80211_tx_info *info, u8 sta_id) 205 { 206 struct ieee80211_hdr *hdr = (void *)skb->data; 207 __le16 fc = hdr->frame_control; 208 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 209 u32 len = skb->len + FCS_LEN; 210 u8 ac; 211 212 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 213 tx_flags |= TX_CMD_FLG_ACK; 214 else 215 tx_flags &= ~TX_CMD_FLG_ACK; 216 217 if (ieee80211_is_probe_resp(fc)) 218 tx_flags |= TX_CMD_FLG_TSF; 219 220 if (ieee80211_has_morefrags(fc)) 221 tx_flags |= TX_CMD_FLG_MORE_FRAG; 222 223 if (ieee80211_is_data_qos(fc)) { 224 u8 *qc = ieee80211_get_qos_ctl(hdr); 225 tx_cmd->tid_tspec = qc[0] & 0xf; 226 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 227 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 228 tx_cmd->offload_assist |= 229 cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU)); 230 } else if (ieee80211_is_back_req(fc)) { 231 struct ieee80211_bar *bar = (void *)skb->data; 232 u16 control = le16_to_cpu(bar->control); 233 u16 ssn = le16_to_cpu(bar->start_seq_num); 234 235 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 236 tx_cmd->tid_tspec = (control & 237 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 238 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 239 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 240 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 241 ssn); 242 } else { 243 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 244 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 245 tx_flags |= TX_CMD_FLG_SEQ_CTL; 246 else 247 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 248 } 249 250 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */ 251 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 252 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 253 else 254 ac = tid_to_mac80211_ac[0]; 255 256 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 257 TX_CMD_FLG_BT_PRIO_POS; 258 259 if (ieee80211_is_mgmt(fc)) { 260 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 261 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 262 else if (ieee80211_is_action(fc)) 263 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 264 else 265 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 266 267 /* The spec allows Action frames in A-MPDU, we don't support 268 * it 269 */ 270 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 271 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 272 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 273 } else { 274 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 275 } 276 277 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 278 !is_multicast_ether_addr(ieee80211_get_DA(hdr))) 279 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 280 281 if (fw_has_capa(&mvm->fw->ucode_capa, 282 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 283 ieee80211_action_contains_tpc(skb)) 284 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 285 286 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 287 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 288 tx_cmd->len = cpu_to_le16((u16)skb->len); 289 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 290 tx_cmd->sta_id = sta_id; 291 292 /* padding is inserted later in transport */ 293 if (ieee80211_hdrlen(fc) % 4 && 294 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU)))) 295 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD)); 296 297 tx_cmd->offload_assist |= 298 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info)); 299 } 300 301 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 302 struct ieee80211_tx_info *info, 303 struct ieee80211_sta *sta) 304 { 305 int rate_idx; 306 u8 rate_plcp; 307 u32 rate_flags; 308 309 /* HT rate doesn't make sense for a non data frame */ 310 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, 311 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n", 312 info->control.rates[0].flags, 313 info->control.rates[0].idx); 314 315 rate_idx = info->control.rates[0].idx; 316 /* if the rate isn't a well known legacy rate, take the lowest one */ 317 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 318 rate_idx = rate_lowest_index( 319 &mvm->nvm_data->bands[info->band], sta); 320 321 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 322 if (info->band == NL80211_BAND_5GHZ) 323 rate_idx += IWL_FIRST_OFDM_RATE; 324 325 /* For 2.4 GHZ band, check that there is no need to remap */ 326 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 327 328 /* Get PLCP rate for tx_cmd->rate_n_flags */ 329 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 330 331 if (info->band == NL80211_BAND_2GHZ && 332 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 333 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 334 else 335 rate_flags = 336 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 337 338 /* Set CCK flag as needed */ 339 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 340 rate_flags |= RATE_MCS_CCK_MSK; 341 342 return (u32)rate_plcp | rate_flags; 343 } 344 345 /* 346 * Sets the fields in the Tx cmd that are rate related 347 */ 348 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 349 struct ieee80211_tx_info *info, 350 struct ieee80211_sta *sta, __le16 fc) 351 { 352 /* Set retry limit on RTS packets */ 353 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 354 355 /* Set retry limit on DATA packets and Probe Responses*/ 356 if (ieee80211_is_probe_resp(fc)) { 357 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 358 tx_cmd->rts_retry_limit = 359 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 360 } else if (ieee80211_is_back_req(fc)) { 361 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 362 } else { 363 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 364 } 365 366 /* 367 * for data packets, rate info comes from the table inside the fw. This 368 * table is controlled by LINK_QUALITY commands 369 */ 370 371 if (ieee80211_is_data(fc) && sta) { 372 tx_cmd->initial_rate_index = 0; 373 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 374 return; 375 } else if (ieee80211_is_back_req(fc)) { 376 tx_cmd->tx_flags |= 377 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 378 } 379 380 mvm->mgmt_last_antenna_idx = 381 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 382 mvm->mgmt_last_antenna_idx); 383 384 /* Set the rate in the TX cmd */ 385 tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 386 } 387 388 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 389 u8 *crypto_hdr) 390 { 391 struct ieee80211_key_conf *keyconf = info->control.hw_key; 392 u64 pn; 393 394 pn = atomic64_inc_return(&keyconf->tx_pn); 395 crypto_hdr[0] = pn; 396 crypto_hdr[2] = 0; 397 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 398 crypto_hdr[1] = pn >> 8; 399 crypto_hdr[4] = pn >> 16; 400 crypto_hdr[5] = pn >> 24; 401 crypto_hdr[6] = pn >> 32; 402 crypto_hdr[7] = pn >> 40; 403 } 404 405 /* 406 * Sets the fields in the Tx cmd that are crypto related 407 */ 408 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 409 struct ieee80211_tx_info *info, 410 struct iwl_tx_cmd *tx_cmd, 411 struct sk_buff *skb_frag, 412 int hdrlen) 413 { 414 struct ieee80211_key_conf *keyconf = info->control.hw_key; 415 u8 *crypto_hdr = skb_frag->data + hdrlen; 416 u64 pn; 417 418 switch (keyconf->cipher) { 419 case WLAN_CIPHER_SUITE_CCMP: 420 case WLAN_CIPHER_SUITE_CCMP_256: 421 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 422 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 423 break; 424 425 case WLAN_CIPHER_SUITE_TKIP: 426 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 427 pn = atomic64_inc_return(&keyconf->tx_pn); 428 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 429 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 430 break; 431 432 case WLAN_CIPHER_SUITE_WEP104: 433 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 434 /* fall through */ 435 case WLAN_CIPHER_SUITE_WEP40: 436 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 437 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 438 TX_CMD_SEC_WEP_KEY_IDX_MSK); 439 440 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 441 break; 442 case WLAN_CIPHER_SUITE_GCMP: 443 case WLAN_CIPHER_SUITE_GCMP_256: 444 /* TODO: Taking the key from the table might introduce a race 445 * when PTK rekeying is done, having an old packets with a PN 446 * based on the old key but the message encrypted with a new 447 * one. 448 * Need to handle this. 449 */ 450 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE; 451 tx_cmd->key[0] = keyconf->hw_key_idx; 452 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 453 break; 454 default: 455 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 456 } 457 } 458 459 /* 460 * Allocates and sets the Tx cmd the driver data pointers in the skb 461 */ 462 static struct iwl_device_cmd * 463 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 464 struct ieee80211_tx_info *info, int hdrlen, 465 struct ieee80211_sta *sta, u8 sta_id) 466 { 467 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 468 struct iwl_device_cmd *dev_cmd; 469 struct iwl_tx_cmd *tx_cmd; 470 471 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 472 473 if (unlikely(!dev_cmd)) 474 return NULL; 475 476 memset(dev_cmd, 0, sizeof(*dev_cmd)); 477 dev_cmd->hdr.cmd = TX_CMD; 478 479 if (iwl_mvm_has_new_tx_api(mvm)) { 480 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 481 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info); 482 483 /* padding is inserted later in transport */ 484 /* FIXME - check for AMSDU may need to be removed */ 485 if (ieee80211_hdrlen(hdr->frame_control) % 4 && 486 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 487 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 488 489 cmd->offload_assist |= cpu_to_le16(offload_assist); 490 491 /* Total # bytes to be transmitted */ 492 cmd->len = cpu_to_le16((u16)skb->len); 493 494 /* Copy MAC header from skb into command buffer */ 495 memcpy(cmd->hdr, hdr, hdrlen); 496 497 if (!info->control.hw_key) 498 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS); 499 500 /* For data packets rate info comes from the fw */ 501 if (ieee80211_is_data(hdr->frame_control) && sta) 502 goto out; 503 504 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE); 505 cmd->rate_n_flags = 506 cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 507 508 goto out; 509 } 510 511 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 512 513 if (info->control.hw_key) 514 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 515 516 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 517 518 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 519 520 /* Copy MAC header from skb into command buffer */ 521 memcpy(tx_cmd->hdr, hdr, hdrlen); 522 523 out: 524 return dev_cmd; 525 } 526 527 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 528 struct iwl_device_cmd *cmd) 529 { 530 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 531 532 memset(&skb_info->status, 0, sizeof(skb_info->status)); 533 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 534 535 skb_info->driver_data[1] = cmd; 536 } 537 538 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 539 struct ieee80211_tx_info *info, __le16 fc) 540 { 541 if (!iwl_mvm_is_dqa_supported(mvm)) 542 return info->hw_queue; 543 544 switch (info->control.vif->type) { 545 case NL80211_IFTYPE_AP: 546 case NL80211_IFTYPE_ADHOC: 547 /* 548 * Handle legacy hostapd as well, where station may be added 549 * only after assoc. Take care of the case where we send a 550 * deauth to a station that we don't have. 551 */ 552 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc) || 553 ieee80211_is_deauth(fc)) 554 return mvm->probe_queue; 555 if (info->hw_queue == info->control.vif->cab_queue) 556 return info->hw_queue; 557 558 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 559 "fc=0x%02x", le16_to_cpu(fc)); 560 return mvm->probe_queue; 561 case NL80211_IFTYPE_P2P_DEVICE: 562 if (ieee80211_is_mgmt(fc)) 563 return mvm->p2p_dev_queue; 564 if (info->hw_queue == info->control.vif->cab_queue) 565 return info->hw_queue; 566 567 WARN_ON_ONCE(1); 568 return mvm->p2p_dev_queue; 569 default: 570 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 571 return -1; 572 } 573 } 574 575 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 576 { 577 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 578 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 579 struct ieee80211_tx_info info; 580 struct iwl_device_cmd *dev_cmd; 581 u8 sta_id; 582 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 583 int queue; 584 585 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used 586 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel 587 * queue. STATION (HS2.0) uses the auxiliary context of the FW, 588 * and hence needs to be sent on the aux queue 589 */ 590 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 591 skb_info->control.vif->type == NL80211_IFTYPE_STATION) 592 skb_info->hw_queue = mvm->aux_queue; 593 594 memcpy(&info, skb->cb, sizeof(info)); 595 596 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 597 return -1; 598 599 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 600 (!info.control.vif || 601 info.hw_queue != info.control.vif->cab_queue))) 602 return -1; 603 604 queue = info.hw_queue; 605 606 /* 607 * If the interface on which the frame is sent is the P2P_DEVICE 608 * or an AP/GO interface use the broadcast station associated 609 * with it; otherwise if the interface is a managed interface 610 * use the AP station associated with it for multicast traffic 611 * (this is not possible for unicast packets as a TLDS discovery 612 * response are sent without a station entry); otherwise use the 613 * AUX station. 614 * In DQA mode, if vif is of type STATION and frames are not multicast 615 * or offchannel, they should be sent from the BSS queue. 616 * For example, TDLS setup frames should be sent on this queue, 617 * as they go through the AP. 618 */ 619 sta_id = mvm->aux_sta.sta_id; 620 if (info.control.vif) { 621 struct iwl_mvm_vif *mvmvif = 622 iwl_mvm_vif_from_mac80211(info.control.vif); 623 624 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 625 info.control.vif->type == NL80211_IFTYPE_AP || 626 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 627 sta_id = mvmvif->bcast_sta.sta_id; 628 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, 629 hdr->frame_control); 630 if (queue < 0) 631 return -1; 632 633 if (queue == info.control.vif->cab_queue) 634 queue = mvmvif->cab_queue; 635 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 636 is_multicast_ether_addr(hdr->addr1)) { 637 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id); 638 639 if (ap_sta_id != IWL_MVM_INVALID_STA) 640 sta_id = ap_sta_id; 641 } else if (iwl_mvm_is_dqa_supported(mvm) && 642 info.control.vif->type == NL80211_IFTYPE_STATION && 643 queue != mvm->aux_queue) { 644 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; 645 } 646 } 647 648 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 649 650 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 651 if (!dev_cmd) 652 return -1; 653 654 /* From now on, we cannot access info->control */ 655 iwl_mvm_skb_prepare_status(skb, dev_cmd); 656 657 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 658 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 659 return -1; 660 } 661 662 /* 663 * Increase the pending frames counter, so that later when a reply comes 664 * in and the counter is decreased - we don't start getting negative 665 * values. 666 * Note that we don't need to make sure it isn't agg'd, since we're 667 * TXing non-sta 668 * For DQA mode - we shouldn't increase it though 669 */ 670 if (!iwl_mvm_is_dqa_supported(mvm)) 671 atomic_inc(&mvm->pending_frames[sta_id]); 672 673 return 0; 674 } 675 676 #ifdef CONFIG_INET 677 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 678 struct ieee80211_tx_info *info, 679 struct ieee80211_sta *sta, 680 struct sk_buff_head *mpdus_skb) 681 { 682 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 683 struct ieee80211_hdr *hdr = (void *)skb->data; 684 unsigned int mss = skb_shinfo(skb)->gso_size; 685 struct sk_buff *tmp, *next; 686 char cb[sizeof(skb->cb)]; 687 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 688 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 689 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 690 u16 snap_ip_tcp, pad, i = 0; 691 unsigned int dbg_max_amsdu_len; 692 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG; 693 u8 *qc, tid, txf; 694 695 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 696 tcp_hdrlen(skb); 697 698 qc = ieee80211_get_qos_ctl(hdr); 699 tid = *qc & IEEE80211_QOS_CTL_TID_MASK; 700 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 701 return -EINVAL; 702 703 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len); 704 705 if (!sta->max_amsdu_len || 706 !ieee80211_is_data_qos(hdr->frame_control) || 707 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) { 708 num_subframes = 1; 709 pad = 0; 710 goto segment; 711 } 712 713 /* 714 * Do not build AMSDU for IPv6 with extension headers. 715 * ask stack to segment and checkum the generated MPDUs for us. 716 */ 717 if (skb->protocol == htons(ETH_P_IPV6) && 718 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 719 IPPROTO_TCP) { 720 num_subframes = 1; 721 pad = 0; 722 netdev_features &= ~NETIF_F_CSUM_MASK; 723 goto segment; 724 } 725 726 /* 727 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 728 * during an BA session. 729 */ 730 if (info->flags & IEEE80211_TX_CTL_AMPDU && 731 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) { 732 num_subframes = 1; 733 pad = 0; 734 goto segment; 735 } 736 737 max_amsdu_len = sta->max_amsdu_len; 738 739 /* the Tx FIFO to which this A-MSDU will be routed */ 740 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 741 742 /* 743 * Don't send an AMSDU that will be longer than the TXF. 744 * Add a security margin of 256 for the TX command + headers. 745 * We also want to have the start of the next packet inside the 746 * fifo to be able to send bursts. 747 */ 748 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 749 mvm->smem_cfg.lmac[0].txfifo_size[txf] - 256); 750 751 if (unlikely(dbg_max_amsdu_len)) 752 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 753 dbg_max_amsdu_len); 754 755 /* 756 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 757 * supported. This is a spec requirement (IEEE 802.11-2015 758 * section 8.7.3 NOTE 3). 759 */ 760 if (info->flags & IEEE80211_TX_CTL_AMPDU && 761 !sta->vht_cap.vht_supported) 762 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 763 764 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 765 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 766 pad = (4 - subf_len) & 0x3; 767 768 /* 769 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 770 * N * subf_len + (N - 1) * pad. 771 */ 772 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 773 if (num_subframes > 1) 774 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 775 776 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 777 tcp_hdrlen(skb) + skb->data_len; 778 779 /* 780 * Make sure we have enough TBs for the A-MSDU: 781 * 2 for each subframe 782 * 1 more for each fragment 783 * 1 more for the potential data in the header 784 */ 785 num_subframes = 786 min_t(unsigned int, num_subframes, 787 (mvm->trans->max_skb_frags - 1 - 788 skb_shinfo(skb)->nr_frags) / 2); 789 790 /* This skb fits in one single A-MSDU */ 791 if (num_subframes * mss >= tcp_payload_len) { 792 __skb_queue_tail(mpdus_skb, skb); 793 return 0; 794 } 795 796 /* 797 * Trick the segmentation function to make it 798 * create SKBs that can fit into one A-MSDU. 799 */ 800 segment: 801 skb_shinfo(skb)->gso_size = num_subframes * mss; 802 memcpy(cb, skb->cb, sizeof(cb)); 803 804 next = skb_gso_segment(skb, netdev_features); 805 skb_shinfo(skb)->gso_size = mss; 806 if (WARN_ON_ONCE(IS_ERR(next))) 807 return -EINVAL; 808 else if (next) 809 consume_skb(skb); 810 811 while (next) { 812 tmp = next; 813 next = tmp->next; 814 815 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 816 /* 817 * Compute the length of all the data added for the A-MSDU. 818 * This will be used to compute the length to write in the TX 819 * command. We have: SNAP + IP + TCP for n -1 subframes and 820 * ETH header for n subframes. 821 */ 822 tcp_payload_len = skb_tail_pointer(tmp) - 823 skb_transport_header(tmp) - 824 tcp_hdrlen(tmp) + tmp->data_len; 825 826 if (ipv4) 827 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 828 829 if (tcp_payload_len > mss) { 830 skb_shinfo(tmp)->gso_size = mss; 831 } else { 832 qc = ieee80211_get_qos_ctl((void *)tmp->data); 833 834 if (ipv4) 835 ip_send_check(ip_hdr(tmp)); 836 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 837 skb_shinfo(tmp)->gso_size = 0; 838 } 839 840 tmp->prev = NULL; 841 tmp->next = NULL; 842 843 __skb_queue_tail(mpdus_skb, tmp); 844 i++; 845 } 846 847 return 0; 848 } 849 #else /* CONFIG_INET */ 850 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 851 struct ieee80211_tx_info *info, 852 struct ieee80211_sta *sta, 853 struct sk_buff_head *mpdus_skb) 854 { 855 /* Impossible to get TSO with CONFIG_INET */ 856 WARN_ON(1); 857 858 return -1; 859 } 860 #endif 861 862 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, 863 struct iwl_mvm_sta *mvm_sta, u8 tid, 864 struct sk_buff *skb) 865 { 866 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 867 u8 mac_queue = info->hw_queue; 868 struct sk_buff_head *deferred_tx_frames; 869 870 lockdep_assert_held(&mvm_sta->lock); 871 872 mvm_sta->deferred_traffic_tid_map |= BIT(tid); 873 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); 874 875 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; 876 877 skb_queue_tail(deferred_tx_frames, skb); 878 879 /* 880 * The first deferred frame should've stopped the MAC queues, so we 881 * should never get a second deferred frame for the RA/TID. 882 */ 883 if (!WARN(skb_queue_len(deferred_tx_frames) != 1, 884 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid, 885 skb_queue_len(deferred_tx_frames))) { 886 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); 887 schedule_work(&mvm->add_stream_wk); 888 } 889 } 890 891 /* Check if there are any timed-out TIDs on a given shared TXQ */ 892 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 893 { 894 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 895 unsigned long now = jiffies; 896 int tid; 897 898 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 899 return false; 900 901 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 902 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 903 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 904 return true; 905 } 906 907 return false; 908 } 909 910 /* 911 * Sets the fields in the Tx cmd that are crypto related 912 */ 913 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 914 struct ieee80211_tx_info *info, 915 struct ieee80211_sta *sta) 916 { 917 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 918 struct iwl_mvm_sta *mvmsta; 919 struct iwl_device_cmd *dev_cmd; 920 __le16 fc; 921 u16 seq_number = 0; 922 u8 tid = IWL_MAX_TID_COUNT; 923 u16 txq_id = info->hw_queue; 924 bool is_ampdu = false; 925 int hdrlen; 926 927 mvmsta = iwl_mvm_sta_from_mac80211(sta); 928 fc = hdr->frame_control; 929 hdrlen = ieee80211_hdrlen(fc); 930 931 if (WARN_ON_ONCE(!mvmsta)) 932 return -1; 933 934 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 935 return -1; 936 937 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 938 sta, mvmsta->sta_id); 939 if (!dev_cmd) 940 goto drop; 941 942 /* 943 * we handle that entirely ourselves -- for uAPSD the firmware 944 * will always send a notification, and for PS-Poll responses 945 * we'll notify mac80211 when getting frame status 946 */ 947 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 948 949 spin_lock(&mvmsta->lock); 950 951 /* nullfunc frames should go to the MGMT queue regardless of QOS, 952 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 953 * assignment of MGMT TID 954 */ 955 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 956 u8 *qc = NULL; 957 qc = ieee80211_get_qos_ctl(hdr); 958 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 959 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 960 goto drop_unlock_sta; 961 962 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 963 if (WARN_ON_ONCE(is_ampdu && 964 mvmsta->tid_data[tid].state != IWL_AGG_ON)) 965 goto drop_unlock_sta; 966 967 seq_number = mvmsta->tid_data[tid].seq_number; 968 seq_number &= IEEE80211_SCTL_SEQ; 969 970 if (!iwl_mvm_has_new_tx_api(mvm)) { 971 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 972 973 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 974 hdr->seq_ctrl |= cpu_to_le16(seq_number); 975 /* update the tx_cmd hdr as it was already copied */ 976 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 977 } 978 } 979 980 if (iwl_mvm_is_dqa_supported(mvm) || is_ampdu) 981 txq_id = mvmsta->tid_data[tid].txq_id; 982 983 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) { 984 /* default to TID 0 for non-QoS packets */ 985 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; 986 987 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; 988 } 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 iwl_mvm_is_dqa_supported(mvm)) { 996 /* If TXQ needs to be allocated... */ 997 if (txq_id == IWL_MVM_INVALID_QUEUE) { 998 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); 999 1000 /* 1001 * The frame is now deferred, and the worker scheduled 1002 * will re-allocate it, so we can free it for now. 1003 */ 1004 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1005 spin_unlock(&mvmsta->lock); 1006 return 0; 1007 } 1008 1009 /* queue should always be active in new TX path */ 1010 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1011 1012 /* If we are here - TXQ exists and needs to be re-activated */ 1013 spin_lock(&mvm->queue_info_lock); 1014 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1015 mvmsta->tid_data[tid].is_tid_active = true; 1016 spin_unlock(&mvm->queue_info_lock); 1017 1018 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n", 1019 txq_id); 1020 } 1021 1022 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) { 1023 /* Keep track of the time of the last frame for this RA/TID */ 1024 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1025 1026 /* 1027 * If we have timed-out TIDs - schedule the worker that will 1028 * reconfig the queues and update them 1029 * 1030 * Note that the mvm->queue_info_lock isn't being taken here in 1031 * order to not serialize the TX flow. This isn't dangerous 1032 * because scheduling mvm->add_stream_wk can't ruin the state, 1033 * and if we DON'T schedule it due to some race condition then 1034 * next TX we get here we will. 1035 */ 1036 if (unlikely(mvm->queue_info[txq_id].status == 1037 IWL_MVM_QUEUE_SHARED && 1038 iwl_mvm_txq_should_update(mvm, txq_id))) 1039 schedule_work(&mvm->add_stream_wk); 1040 } 1041 1042 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 1043 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 1044 1045 /* From now on, we cannot access info->control */ 1046 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1047 1048 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1049 goto drop_unlock_sta; 1050 1051 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1052 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1053 1054 spin_unlock(&mvmsta->lock); 1055 1056 /* Increase pending frames count if this isn't AMPDU or DQA queue */ 1057 if (!iwl_mvm_is_dqa_supported(mvm) && !is_ampdu) 1058 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); 1059 1060 return 0; 1061 1062 drop_unlock_sta: 1063 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1064 spin_unlock(&mvmsta->lock); 1065 drop: 1066 return -1; 1067 } 1068 1069 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 1070 struct ieee80211_sta *sta) 1071 { 1072 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1073 struct ieee80211_tx_info info; 1074 struct sk_buff_head mpdus_skbs; 1075 unsigned int payload_len; 1076 int ret; 1077 1078 if (WARN_ON_ONCE(!mvmsta)) 1079 return -1; 1080 1081 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1082 return -1; 1083 1084 memcpy(&info, skb->cb, sizeof(info)); 1085 1086 if (!skb_is_gso(skb)) 1087 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1088 1089 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1090 tcp_hdrlen(skb) + skb->data_len; 1091 1092 if (payload_len <= skb_shinfo(skb)->gso_size) 1093 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1094 1095 __skb_queue_head_init(&mpdus_skbs); 1096 1097 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1098 if (ret) 1099 return ret; 1100 1101 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1102 return ret; 1103 1104 while (!skb_queue_empty(&mpdus_skbs)) { 1105 skb = __skb_dequeue(&mpdus_skbs); 1106 1107 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1108 if (ret) { 1109 __skb_queue_purge(&mpdus_skbs); 1110 return ret; 1111 } 1112 } 1113 1114 return 0; 1115 } 1116 1117 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1118 struct ieee80211_sta *sta, u8 tid) 1119 { 1120 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1121 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1122 struct ieee80211_vif *vif = mvmsta->vif; 1123 1124 lockdep_assert_held(&mvmsta->lock); 1125 1126 if ((tid_data->state == IWL_AGG_ON || 1127 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA || 1128 iwl_mvm_is_dqa_supported(mvm)) && 1129 iwl_mvm_tid_queued(tid_data) == 0) { 1130 /* 1131 * Now that this aggregation or DQA queue is empty tell 1132 * mac80211 so it knows we no longer have frames buffered for 1133 * the station on this TID (for the TIM bitmap calculation.) 1134 */ 1135 ieee80211_sta_set_buffered(sta, tid, false); 1136 } 1137 1138 if (tid_data->ssn != tid_data->next_reclaimed) 1139 return; 1140 1141 switch (tid_data->state) { 1142 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1143 IWL_DEBUG_TX_QUEUES(mvm, 1144 "Can continue addBA flow ssn = next_recl = %d\n", 1145 tid_data->next_reclaimed); 1146 tid_data->state = IWL_AGG_STARTING; 1147 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1148 break; 1149 1150 case IWL_EMPTYING_HW_QUEUE_DELBA: 1151 IWL_DEBUG_TX_QUEUES(mvm, 1152 "Can continue DELBA flow ssn = next_recl = %d\n", 1153 tid_data->next_reclaimed); 1154 if (!iwl_mvm_is_dqa_supported(mvm)) { 1155 u8 mac80211_ac = tid_to_mac80211_ac[tid]; 1156 1157 iwl_mvm_disable_txq(mvm, tid_data->txq_id, 1158 vif->hw_queue[mac80211_ac], tid, 1159 CMD_ASYNC); 1160 } 1161 tid_data->state = IWL_AGG_OFF; 1162 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1163 break; 1164 1165 default: 1166 break; 1167 } 1168 } 1169 1170 #ifdef CONFIG_IWLWIFI_DEBUG 1171 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1172 { 1173 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1174 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1175 1176 switch (status & TX_STATUS_MSK) { 1177 case TX_STATUS_SUCCESS: 1178 return "SUCCESS"; 1179 TX_STATUS_POSTPONE(DELAY); 1180 TX_STATUS_POSTPONE(FEW_BYTES); 1181 TX_STATUS_POSTPONE(BT_PRIO); 1182 TX_STATUS_POSTPONE(QUIET_PERIOD); 1183 TX_STATUS_POSTPONE(CALC_TTAK); 1184 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1185 TX_STATUS_FAIL(SHORT_LIMIT); 1186 TX_STATUS_FAIL(LONG_LIMIT); 1187 TX_STATUS_FAIL(UNDERRUN); 1188 TX_STATUS_FAIL(DRAIN_FLOW); 1189 TX_STATUS_FAIL(RFKILL_FLUSH); 1190 TX_STATUS_FAIL(LIFE_EXPIRE); 1191 TX_STATUS_FAIL(DEST_PS); 1192 TX_STATUS_FAIL(HOST_ABORTED); 1193 TX_STATUS_FAIL(BT_RETRY); 1194 TX_STATUS_FAIL(STA_INVALID); 1195 TX_STATUS_FAIL(FRAG_DROPPED); 1196 TX_STATUS_FAIL(TID_DISABLE); 1197 TX_STATUS_FAIL(FIFO_FLUSHED); 1198 TX_STATUS_FAIL(SMALL_CF_POLL); 1199 TX_STATUS_FAIL(FW_DROP); 1200 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1201 } 1202 1203 return "UNKNOWN"; 1204 1205 #undef TX_STATUS_FAIL 1206 #undef TX_STATUS_POSTPONE 1207 } 1208 #endif /* CONFIG_IWLWIFI_DEBUG */ 1209 1210 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1211 enum nl80211_band band, 1212 struct ieee80211_tx_rate *r) 1213 { 1214 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1215 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1216 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1217 case RATE_MCS_CHAN_WIDTH_20: 1218 break; 1219 case RATE_MCS_CHAN_WIDTH_40: 1220 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1221 break; 1222 case RATE_MCS_CHAN_WIDTH_80: 1223 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1224 break; 1225 case RATE_MCS_CHAN_WIDTH_160: 1226 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1227 break; 1228 } 1229 if (rate_n_flags & RATE_MCS_SGI_MSK) 1230 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1231 if (rate_n_flags & RATE_MCS_HT_MSK) { 1232 r->flags |= IEEE80211_TX_RC_MCS; 1233 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1234 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1235 ieee80211_rate_set_vht( 1236 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1237 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1238 RATE_VHT_MCS_NSS_POS) + 1); 1239 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1240 } else { 1241 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1242 band); 1243 } 1244 } 1245 1246 /** 1247 * translate ucode response to mac80211 tx status control values 1248 */ 1249 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1250 struct ieee80211_tx_info *info) 1251 { 1252 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1253 1254 info->status.antenna = 1255 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1256 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1257 } 1258 1259 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1260 u32 status) 1261 { 1262 struct iwl_fw_dbg_trigger_tlv *trig; 1263 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1264 int i; 1265 1266 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) 1267 return; 1268 1269 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); 1270 status_trig = (void *)trig->data; 1271 1272 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) 1273 return; 1274 1275 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1276 /* don't collect on status 0 */ 1277 if (!status_trig->statuses[i].status) 1278 break; 1279 1280 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1281 continue; 1282 1283 iwl_mvm_fw_dbg_collect_trig(mvm, trig, 1284 "Tx status %d was received", 1285 status & TX_STATUS_MSK); 1286 break; 1287 } 1288 } 1289 1290 /** 1291 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1292 * @tx_resp: the Tx response from the fw (agg or non-agg) 1293 * 1294 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1295 * it can't know that everything will go well until the end of the AMPDU, it 1296 * can't know in advance the number of MPDUs that will be sent in the current 1297 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1298 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1299 * of the batch. This is why the SSN of the SCD is written at the end of the 1300 * whole struct at a variable offset. This function knows how to cope with the 1301 * variable offset and returns the SSN of the SCD. 1302 */ 1303 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1304 struct iwl_mvm_tx_resp *tx_resp) 1305 { 1306 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1307 tx_resp->frame_count) & 0xfff; 1308 } 1309 1310 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1311 struct iwl_rx_packet *pkt) 1312 { 1313 struct ieee80211_sta *sta; 1314 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1315 int txq_id = SEQ_TO_QUEUE(sequence); 1316 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1317 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1318 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1319 struct agg_tx_status *agg_status = 1320 iwl_mvm_get_agg_status(mvm, tx_resp); 1321 u32 status = le16_to_cpu(agg_status->status); 1322 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1323 struct iwl_mvm_sta *mvmsta; 1324 struct sk_buff_head skbs; 1325 u8 skb_freed = 0; 1326 u16 next_reclaimed, seq_ctl; 1327 bool is_ndp = false; 1328 1329 __skb_queue_head_init(&skbs); 1330 1331 if (iwl_mvm_has_new_tx_api(mvm)) 1332 txq_id = le16_to_cpu(tx_resp->v6.tx_queue); 1333 1334 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1335 1336 /* we can free until ssn % q.n_bd not inclusive */ 1337 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1338 1339 while (!skb_queue_empty(&skbs)) { 1340 struct sk_buff *skb = __skb_dequeue(&skbs); 1341 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1342 1343 skb_freed++; 1344 1345 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1346 1347 memset(&info->status, 0, sizeof(info->status)); 1348 1349 /* inform mac80211 about what happened with the frame */ 1350 switch (status & TX_STATUS_MSK) { 1351 case TX_STATUS_SUCCESS: 1352 case TX_STATUS_DIRECT_DONE: 1353 info->flags |= IEEE80211_TX_STAT_ACK; 1354 break; 1355 case TX_STATUS_FAIL_DEST_PS: 1356 /* In DQA, the FW should have stopped the queue and not 1357 * return this status 1358 */ 1359 WARN_ON(iwl_mvm_is_dqa_supported(mvm)); 1360 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1361 break; 1362 default: 1363 break; 1364 } 1365 1366 iwl_mvm_tx_status_check_trigger(mvm, status); 1367 1368 info->status.rates[0].count = tx_resp->failure_frame + 1; 1369 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1370 info); 1371 info->status.status_driver_data[1] = 1372 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1373 1374 /* Single frame failure in an AMPDU queue => send BAR */ 1375 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1376 !(info->flags & IEEE80211_TX_STAT_ACK) && 1377 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) 1378 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1379 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1380 1381 /* W/A FW bug: seq_ctl is wrong when the status isn't success */ 1382 if (status != TX_STATUS_SUCCESS) { 1383 struct ieee80211_hdr *hdr = (void *)skb->data; 1384 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1385 } 1386 1387 if (unlikely(!seq_ctl)) { 1388 struct ieee80211_hdr *hdr = (void *)skb->data; 1389 1390 /* 1391 * If it is an NDP, we can't update next_reclaim since 1392 * its sequence control is 0. Note that for that same 1393 * reason, NDPs are never sent to A-MPDU'able queues 1394 * so that we can never have more than one freed frame 1395 * for a single Tx resonse (see WARN_ON below). 1396 */ 1397 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1398 is_ndp = true; 1399 } 1400 1401 /* 1402 * TODO: this is not accurate if we are freeing more than one 1403 * packet. 1404 */ 1405 info->status.tx_time = 1406 le16_to_cpu(tx_resp->wireless_media_time); 1407 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1408 info->status.status_driver_data[0] = 1409 (void *)(uintptr_t)tx_resp->reduced_tpc; 1410 1411 ieee80211_tx_status(mvm->hw, skb); 1412 } 1413 1414 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) { 1415 /* If this is an aggregation queue, we use the ssn since: 1416 * ssn = wifi seq_num % 256. 1417 * The seq_ctl is the sequence control of the packet to which 1418 * this Tx response relates. But if there is a hole in the 1419 * bitmap of the BA we received, this Tx response may allow to 1420 * reclaim the hole and all the subsequent packets that were 1421 * already acked. In that case, seq_ctl != ssn, and the next 1422 * packet to be reclaimed will be ssn and not seq_ctl. In that 1423 * case, several packets will be reclaimed even if 1424 * frame_count = 1. 1425 * 1426 * The ssn is the index (% 256) of the latest packet that has 1427 * treated (acked / dropped) + 1. 1428 */ 1429 next_reclaimed = ssn; 1430 } else { 1431 /* The next packet to be reclaimed is the one after this one */ 1432 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); 1433 } 1434 1435 IWL_DEBUG_TX_REPLY(mvm, 1436 "TXQ %d status %s (0x%08x)\n", 1437 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1438 1439 IWL_DEBUG_TX_REPLY(mvm, 1440 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1441 le32_to_cpu(tx_resp->initial_rate), 1442 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1443 ssn, next_reclaimed, seq_ctl); 1444 1445 rcu_read_lock(); 1446 1447 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1448 /* 1449 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1450 * the firmware while we still have packets for it in the Tx queues. 1451 */ 1452 if (WARN_ON_ONCE(!sta)) 1453 goto out; 1454 1455 if (!IS_ERR(sta)) { 1456 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1457 1458 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) { 1459 struct iwl_mvm_tid_data *tid_data = 1460 &mvmsta->tid_data[tid]; 1461 bool send_eosp_ndp = false; 1462 1463 spin_lock_bh(&mvmsta->lock); 1464 1465 if (!is_ndp) { 1466 tid_data->next_reclaimed = next_reclaimed; 1467 IWL_DEBUG_TX_REPLY(mvm, 1468 "Next reclaimed packet:%d\n", 1469 next_reclaimed); 1470 } else { 1471 IWL_DEBUG_TX_REPLY(mvm, 1472 "NDP - don't update next_reclaimed\n"); 1473 } 1474 1475 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1476 1477 if (mvmsta->sleep_tx_count) { 1478 mvmsta->sleep_tx_count--; 1479 if (mvmsta->sleep_tx_count && 1480 !iwl_mvm_tid_queued(tid_data)) { 1481 /* 1482 * The number of frames in the queue 1483 * dropped to 0 even if we sent less 1484 * frames than we thought we had on the 1485 * Tx queue. 1486 * This means we had holes in the BA 1487 * window that we just filled, ask 1488 * mac80211 to send EOSP since the 1489 * firmware won't know how to do that. 1490 * Send NDP and the firmware will send 1491 * EOSP notification that will trigger 1492 * a call to ieee80211_sta_eosp(). 1493 */ 1494 send_eosp_ndp = true; 1495 } 1496 } 1497 1498 spin_unlock_bh(&mvmsta->lock); 1499 if (send_eosp_ndp) { 1500 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1501 IEEE80211_FRAME_RELEASE_UAPSD, 1502 1, tid, false, false); 1503 mvmsta->sleep_tx_count = 0; 1504 ieee80211_send_eosp_nullfunc(sta, tid); 1505 } 1506 } 1507 1508 if (mvmsta->next_status_eosp) { 1509 mvmsta->next_status_eosp = false; 1510 ieee80211_sta_eosp(sta); 1511 } 1512 } else { 1513 mvmsta = NULL; 1514 } 1515 1516 /* 1517 * If the txq is not an AMPDU queue, there is no chance we freed 1518 * several skbs. Check that out... 1519 */ 1520 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) 1521 goto out; 1522 1523 /* We can't free more than one frame at once on a shared queue */ 1524 WARN_ON(skb_freed > 1); 1525 1526 /* If we have still frames for this STA nothing to do here */ 1527 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) 1528 goto out; 1529 1530 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { 1531 1532 /* 1533 * If there are no pending frames for this STA and 1534 * the tx to this station is not disabled, notify 1535 * mac80211 that this station can now wake up in its 1536 * STA table. 1537 * If mvmsta is not NULL, sta is valid. 1538 */ 1539 1540 spin_lock_bh(&mvmsta->lock); 1541 1542 if (!mvmsta->disable_tx) 1543 ieee80211_sta_block_awake(mvm->hw, sta, false); 1544 1545 spin_unlock_bh(&mvmsta->lock); 1546 } 1547 1548 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { 1549 /* 1550 * We are draining and this was the last packet - pre_rcu_remove 1551 * has been called already. We might be after the 1552 * synchronize_net already. 1553 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. 1554 */ 1555 set_bit(sta_id, mvm->sta_drained); 1556 schedule_work(&mvm->sta_drained_wk); 1557 } 1558 1559 out: 1560 rcu_read_unlock(); 1561 } 1562 1563 #ifdef CONFIG_IWLWIFI_DEBUG 1564 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1565 static const char *iwl_get_agg_tx_status(u16 status) 1566 { 1567 switch (status & AGG_TX_STATE_STATUS_MSK) { 1568 AGG_TX_STATE_(TRANSMITTED); 1569 AGG_TX_STATE_(UNDERRUN); 1570 AGG_TX_STATE_(BT_PRIO); 1571 AGG_TX_STATE_(FEW_BYTES); 1572 AGG_TX_STATE_(ABORT); 1573 AGG_TX_STATE_(LAST_SENT_TTL); 1574 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1575 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1576 AGG_TX_STATE_(SCD_QUERY); 1577 AGG_TX_STATE_(TEST_BAD_CRC32); 1578 AGG_TX_STATE_(RESPONSE); 1579 AGG_TX_STATE_(DUMP_TX); 1580 AGG_TX_STATE_(DELAY_TX); 1581 } 1582 1583 return "UNKNOWN"; 1584 } 1585 1586 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1587 struct iwl_rx_packet *pkt) 1588 { 1589 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1590 struct agg_tx_status *frame_status = 1591 iwl_mvm_get_agg_status(mvm, tx_resp); 1592 int i; 1593 1594 for (i = 0; i < tx_resp->frame_count; i++) { 1595 u16 fstatus = le16_to_cpu(frame_status[i].status); 1596 1597 IWL_DEBUG_TX_REPLY(mvm, 1598 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1599 iwl_get_agg_tx_status(fstatus), 1600 fstatus & AGG_TX_STATE_STATUS_MSK, 1601 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1602 AGG_TX_STATE_TRY_CNT_POS, 1603 le16_to_cpu(frame_status[i].sequence)); 1604 } 1605 } 1606 #else 1607 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1608 struct iwl_rx_packet *pkt) 1609 {} 1610 #endif /* CONFIG_IWLWIFI_DEBUG */ 1611 1612 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1613 struct iwl_rx_packet *pkt) 1614 { 1615 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1616 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1617 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1618 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1619 struct iwl_mvm_sta *mvmsta; 1620 int queue = SEQ_TO_QUEUE(sequence); 1621 1622 if (WARN_ON_ONCE(queue < mvm->first_agg_queue && 1623 (!iwl_mvm_is_dqa_supported(mvm) || 1624 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))) 1625 return; 1626 1627 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) 1628 return; 1629 1630 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1631 1632 rcu_read_lock(); 1633 1634 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1635 1636 if (!WARN_ON_ONCE(!mvmsta)) { 1637 mvmsta->tid_data[tid].rate_n_flags = 1638 le32_to_cpu(tx_resp->initial_rate); 1639 mvmsta->tid_data[tid].tx_time = 1640 le16_to_cpu(tx_resp->wireless_media_time); 1641 } 1642 1643 rcu_read_unlock(); 1644 } 1645 1646 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1647 { 1648 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1649 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1650 1651 if (tx_resp->frame_count == 1) 1652 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1653 else 1654 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1655 } 1656 1657 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1658 int txq, int index, 1659 struct ieee80211_tx_info *ba_info, u32 rate) 1660 { 1661 struct sk_buff_head reclaimed_skbs; 1662 struct iwl_mvm_tid_data *tid_data; 1663 struct ieee80211_sta *sta; 1664 struct iwl_mvm_sta *mvmsta; 1665 struct sk_buff *skb; 1666 int freed; 1667 1668 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1669 tid >= IWL_MAX_TID_COUNT, 1670 "sta_id %d tid %d", sta_id, tid)) 1671 return; 1672 1673 rcu_read_lock(); 1674 1675 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1676 1677 /* Reclaiming frames for a station that has been deleted ? */ 1678 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1679 rcu_read_unlock(); 1680 return; 1681 } 1682 1683 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1684 tid_data = &mvmsta->tid_data[tid]; 1685 1686 if (tid_data->txq_id != txq) { 1687 IWL_ERR(mvm, 1688 "invalid BA notification: Q %d, tid %d\n", 1689 tid_data->txq_id, tid); 1690 rcu_read_unlock(); 1691 return; 1692 } 1693 1694 spin_lock_bh(&mvmsta->lock); 1695 1696 __skb_queue_head_init(&reclaimed_skbs); 1697 1698 /* 1699 * Release all TFDs before the SSN, i.e. all TFDs in front of 1700 * block-ack window (we assume that they've been successfully 1701 * transmitted ... if not, it's too late anyway). 1702 */ 1703 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1704 1705 tid_data->next_reclaimed = index; 1706 1707 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1708 1709 freed = 0; 1710 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1711 1712 skb_queue_walk(&reclaimed_skbs, skb) { 1713 struct ieee80211_hdr *hdr = (void *)skb->data; 1714 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1715 1716 if (ieee80211_is_data_qos(hdr->frame_control)) 1717 freed++; 1718 else 1719 WARN_ON_ONCE(1); 1720 1721 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1722 1723 memset(&info->status, 0, sizeof(info->status)); 1724 /* Packet was transmitted successfully, failures come as single 1725 * frames because before failing a frame the firmware transmits 1726 * it without aggregation at least once. 1727 */ 1728 info->flags |= IEEE80211_TX_STAT_ACK; 1729 1730 /* this is the first skb we deliver in this batch */ 1731 /* put the rate scaling data there */ 1732 if (freed == 1) { 1733 info->flags |= IEEE80211_TX_STAT_AMPDU; 1734 memcpy(&info->status, &ba_info->status, 1735 sizeof(ba_info->status)); 1736 iwl_mvm_hwrate_to_tx_status(rate, info); 1737 } 1738 } 1739 1740 spin_unlock_bh(&mvmsta->lock); 1741 1742 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1743 * possible (i.e. first MPDU in the aggregation wasn't acked) 1744 * Still it's important to update RS about sent vs. acked. 1745 */ 1746 if (skb_queue_empty(&reclaimed_skbs)) { 1747 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1748 1749 if (mvmsta->vif) 1750 chanctx_conf = 1751 rcu_dereference(mvmsta->vif->chanctx_conf); 1752 1753 if (WARN_ON_ONCE(!chanctx_conf)) 1754 goto out; 1755 1756 ba_info->band = chanctx_conf->def.chan->band; 1757 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1758 1759 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 1760 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1761 } 1762 1763 out: 1764 rcu_read_unlock(); 1765 1766 while (!skb_queue_empty(&reclaimed_skbs)) { 1767 skb = __skb_dequeue(&reclaimed_skbs); 1768 ieee80211_tx_status(mvm->hw, skb); 1769 } 1770 } 1771 1772 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1773 { 1774 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1775 int sta_id, tid, txq, index; 1776 struct ieee80211_tx_info ba_info = {}; 1777 struct iwl_mvm_ba_notif *ba_notif; 1778 struct iwl_mvm_tid_data *tid_data; 1779 struct iwl_mvm_sta *mvmsta; 1780 1781 if (iwl_mvm_has_new_tx_api(mvm)) { 1782 struct iwl_mvm_compressed_ba_notif *ba_res = 1783 (void *)pkt->data; 1784 1785 sta_id = ba_res->sta_id; 1786 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1787 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1788 ba_info.status.tx_time = 1789 (u16)le32_to_cpu(ba_res->wireless_time); 1790 ba_info.status.status_driver_data[0] = 1791 (void *)(uintptr_t)ba_res->reduced_txp; 1792 1793 if (!le16_to_cpu(ba_res->tfd_cnt)) 1794 goto out; 1795 1796 /* 1797 * TODO: 1798 * When supporting multi TID aggregations - we need to move 1799 * next_reclaimed to be per TXQ and not per TID or handle it 1800 * in a different way. 1801 * This will go together with SN and AddBA offload and cannot 1802 * be handled properly for now. 1803 */ 1804 WARN_ON(le16_to_cpu(ba_res->ra_tid_cnt) != 1); 1805 tid = ba_res->ra_tid[0].tid; 1806 if (tid == IWL_MGMT_TID) 1807 tid = IWL_MAX_TID_COUNT; 1808 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 1809 (int)(le16_to_cpu(ba_res->tfd[0].q_num)), 1810 le16_to_cpu(ba_res->tfd[0].tfd_index), 1811 &ba_info, le32_to_cpu(ba_res->tx_rate)); 1812 1813 out: 1814 IWL_DEBUG_TX_REPLY(mvm, 1815 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1816 sta_id, le32_to_cpu(ba_res->flags), 1817 le16_to_cpu(ba_res->txed), 1818 le16_to_cpu(ba_res->done)); 1819 return; 1820 } 1821 1822 ba_notif = (void *)pkt->data; 1823 sta_id = ba_notif->sta_id; 1824 tid = ba_notif->tid; 1825 /* "flow" corresponds to Tx queue */ 1826 txq = le16_to_cpu(ba_notif->scd_flow); 1827 /* "ssn" is start of block-ack Tx window, corresponds to index 1828 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1829 index = le16_to_cpu(ba_notif->scd_ssn); 1830 1831 rcu_read_lock(); 1832 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1833 if (WARN_ON_ONCE(!mvmsta)) { 1834 rcu_read_unlock(); 1835 return; 1836 } 1837 1838 tid_data = &mvmsta->tid_data[tid]; 1839 1840 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1841 ba_info.status.ampdu_len = ba_notif->txed; 1842 ba_info.status.tx_time = tid_data->tx_time; 1843 ba_info.status.status_driver_data[0] = 1844 (void *)(uintptr_t)ba_notif->reduced_txp; 1845 1846 rcu_read_unlock(); 1847 1848 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1849 tid_data->rate_n_flags); 1850 1851 IWL_DEBUG_TX_REPLY(mvm, 1852 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1853 (u8 *)&ba_notif->sta_addr_lo32, ba_notif->sta_id); 1854 1855 IWL_DEBUG_TX_REPLY(mvm, 1856 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1857 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1858 le64_to_cpu(ba_notif->bitmap), txq, index, 1859 ba_notif->txed, ba_notif->txed_2_done); 1860 1861 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1862 ba_notif->reduced_txp); 1863 } 1864 1865 /* 1866 * Note that there are transports that buffer frames before they reach 1867 * the firmware. This means that after flush_tx_path is called, the 1868 * queue might not be empty. The race-free way to handle this is to: 1869 * 1) set the station as draining 1870 * 2) flush the Tx path 1871 * 3) wait for the transport queues to be empty 1872 */ 1873 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 1874 { 1875 int ret; 1876 struct iwl_tx_path_flush_cmd flush_cmd = { 1877 .queues_ctl = cpu_to_le32(tfd_msk), 1878 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 1879 }; 1880 1881 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1882 sizeof(flush_cmd), &flush_cmd); 1883 if (ret) 1884 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1885 return ret; 1886 } 1887