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 u16 offload_assist) 110 { 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 /* 189 * mac header len should include IV, size is in words unless 190 * the IV is added by the firmware like in WEP. 191 * In new Tx API, the IV is always added by the firmware. 192 */ 193 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 194 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 195 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 196 mh_len += info->control.hw_key->iv_len; 197 mh_len /= 2; 198 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 199 200 out: 201 #endif 202 return offload_assist; 203 } 204 205 /* 206 * Sets most of the Tx cmd's fields 207 */ 208 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 209 struct iwl_tx_cmd *tx_cmd, 210 struct ieee80211_tx_info *info, u8 sta_id) 211 { 212 struct ieee80211_hdr *hdr = (void *)skb->data; 213 __le16 fc = hdr->frame_control; 214 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 215 u32 len = skb->len + FCS_LEN; 216 u16 offload_assist = 0; 217 u8 ac; 218 219 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 220 tx_flags |= TX_CMD_FLG_ACK; 221 else 222 tx_flags &= ~TX_CMD_FLG_ACK; 223 224 if (ieee80211_is_probe_resp(fc)) 225 tx_flags |= TX_CMD_FLG_TSF; 226 227 if (ieee80211_has_morefrags(fc)) 228 tx_flags |= TX_CMD_FLG_MORE_FRAG; 229 230 if (ieee80211_is_data_qos(fc)) { 231 u8 *qc = ieee80211_get_qos_ctl(hdr); 232 tx_cmd->tid_tspec = qc[0] & 0xf; 233 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 234 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 235 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 236 } else if (ieee80211_is_back_req(fc)) { 237 struct ieee80211_bar *bar = (void *)skb->data; 238 u16 control = le16_to_cpu(bar->control); 239 u16 ssn = le16_to_cpu(bar->start_seq_num); 240 241 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 242 tx_cmd->tid_tspec = (control & 243 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 244 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 245 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 246 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 247 ssn); 248 } else { 249 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 250 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 251 tx_flags |= TX_CMD_FLG_SEQ_CTL; 252 else 253 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 254 } 255 256 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */ 257 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 258 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 259 else 260 ac = tid_to_mac80211_ac[0]; 261 262 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 263 TX_CMD_FLG_BT_PRIO_POS; 264 265 if (ieee80211_is_mgmt(fc)) { 266 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 267 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 268 else if (ieee80211_is_action(fc)) 269 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 270 else 271 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 272 273 /* The spec allows Action frames in A-MPDU, we don't support 274 * it 275 */ 276 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 277 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 278 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 279 } else { 280 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 281 } 282 283 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 284 !is_multicast_ether_addr(ieee80211_get_DA(hdr))) 285 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 286 287 if (fw_has_capa(&mvm->fw->ucode_capa, 288 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 289 ieee80211_action_contains_tpc(skb)) 290 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 291 292 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 293 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 294 tx_cmd->len = cpu_to_le16((u16)skb->len); 295 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 296 tx_cmd->sta_id = sta_id; 297 298 /* padding is inserted later in transport */ 299 if (ieee80211_hdrlen(fc) % 4 && 300 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 301 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 302 303 tx_cmd->offload_assist |= 304 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info, 305 offload_assist)); 306 } 307 308 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 309 struct ieee80211_tx_info *info, 310 struct ieee80211_sta *sta) 311 { 312 int rate_idx; 313 u8 rate_plcp; 314 u32 rate_flags; 315 316 /* HT rate doesn't make sense for a non data frame */ 317 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, 318 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n", 319 info->control.rates[0].flags, 320 info->control.rates[0].idx); 321 322 rate_idx = info->control.rates[0].idx; 323 /* if the rate isn't a well known legacy rate, take the lowest one */ 324 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 325 rate_idx = rate_lowest_index( 326 &mvm->nvm_data->bands[info->band], sta); 327 328 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 329 if (info->band == NL80211_BAND_5GHZ) 330 rate_idx += IWL_FIRST_OFDM_RATE; 331 332 /* For 2.4 GHZ band, check that there is no need to remap */ 333 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 334 335 /* Get PLCP rate for tx_cmd->rate_n_flags */ 336 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 337 338 if (info->band == NL80211_BAND_2GHZ && 339 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 340 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 341 else 342 rate_flags = 343 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 344 345 /* Set CCK flag as needed */ 346 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 347 rate_flags |= RATE_MCS_CCK_MSK; 348 349 return (u32)rate_plcp | rate_flags; 350 } 351 352 /* 353 * Sets the fields in the Tx cmd that are rate related 354 */ 355 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 356 struct ieee80211_tx_info *info, 357 struct ieee80211_sta *sta, __le16 fc) 358 { 359 /* Set retry limit on RTS packets */ 360 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 361 362 /* Set retry limit on DATA packets and Probe Responses*/ 363 if (ieee80211_is_probe_resp(fc)) { 364 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 365 tx_cmd->rts_retry_limit = 366 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 367 } else if (ieee80211_is_back_req(fc)) { 368 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 369 } else { 370 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 371 } 372 373 /* 374 * for data packets, rate info comes from the table inside the fw. This 375 * table is controlled by LINK_QUALITY commands 376 */ 377 378 if (ieee80211_is_data(fc) && sta) { 379 tx_cmd->initial_rate_index = 0; 380 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 381 return; 382 } else if (ieee80211_is_back_req(fc)) { 383 tx_cmd->tx_flags |= 384 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 385 } 386 387 mvm->mgmt_last_antenna_idx = 388 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 389 mvm->mgmt_last_antenna_idx); 390 391 /* Set the rate in the TX cmd */ 392 tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 393 } 394 395 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 396 u8 *crypto_hdr) 397 { 398 struct ieee80211_key_conf *keyconf = info->control.hw_key; 399 u64 pn; 400 401 pn = atomic64_inc_return(&keyconf->tx_pn); 402 crypto_hdr[0] = pn; 403 crypto_hdr[2] = 0; 404 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 405 crypto_hdr[1] = pn >> 8; 406 crypto_hdr[4] = pn >> 16; 407 crypto_hdr[5] = pn >> 24; 408 crypto_hdr[6] = pn >> 32; 409 crypto_hdr[7] = pn >> 40; 410 } 411 412 /* 413 * Sets the fields in the Tx cmd that are crypto related 414 */ 415 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 416 struct ieee80211_tx_info *info, 417 struct iwl_tx_cmd *tx_cmd, 418 struct sk_buff *skb_frag, 419 int hdrlen) 420 { 421 struct ieee80211_key_conf *keyconf = info->control.hw_key; 422 u8 *crypto_hdr = skb_frag->data + hdrlen; 423 u64 pn; 424 425 switch (keyconf->cipher) { 426 case WLAN_CIPHER_SUITE_CCMP: 427 case WLAN_CIPHER_SUITE_CCMP_256: 428 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 429 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 430 break; 431 432 case WLAN_CIPHER_SUITE_TKIP: 433 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 434 pn = atomic64_inc_return(&keyconf->tx_pn); 435 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 436 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 437 break; 438 439 case WLAN_CIPHER_SUITE_WEP104: 440 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 441 /* fall through */ 442 case WLAN_CIPHER_SUITE_WEP40: 443 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 444 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 445 TX_CMD_SEC_WEP_KEY_IDX_MSK); 446 447 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 448 break; 449 case WLAN_CIPHER_SUITE_GCMP: 450 case WLAN_CIPHER_SUITE_GCMP_256: 451 /* TODO: Taking the key from the table might introduce a race 452 * when PTK rekeying is done, having an old packets with a PN 453 * based on the old key but the message encrypted with a new 454 * one. 455 * Need to handle this. 456 */ 457 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE; 458 tx_cmd->key[0] = keyconf->hw_key_idx; 459 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 460 break; 461 default: 462 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 463 } 464 } 465 466 /* 467 * Allocates and sets the Tx cmd the driver data pointers in the skb 468 */ 469 static struct iwl_device_cmd * 470 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 471 struct ieee80211_tx_info *info, int hdrlen, 472 struct ieee80211_sta *sta, u8 sta_id) 473 { 474 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 475 struct iwl_device_cmd *dev_cmd; 476 struct iwl_tx_cmd *tx_cmd; 477 478 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 479 480 if (unlikely(!dev_cmd)) 481 return NULL; 482 483 /* Make sure we zero enough of dev_cmd */ 484 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd)); 485 486 memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd)); 487 dev_cmd->hdr.cmd = TX_CMD; 488 489 if (iwl_mvm_has_new_tx_api(mvm)) { 490 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 491 u16 offload_assist = 0; 492 493 if (ieee80211_is_data_qos(hdr->frame_control)) { 494 u8 *qc = ieee80211_get_qos_ctl(hdr); 495 496 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 497 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 498 } 499 500 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, 501 offload_assist); 502 503 /* padding is inserted later in transport */ 504 if (ieee80211_hdrlen(hdr->frame_control) % 4 && 505 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 506 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 507 508 cmd->offload_assist |= cpu_to_le16(offload_assist); 509 510 /* Total # bytes to be transmitted */ 511 cmd->len = cpu_to_le16((u16)skb->len); 512 513 /* Copy MAC header from skb into command buffer */ 514 memcpy(cmd->hdr, hdr, hdrlen); 515 516 if (!info->control.hw_key) 517 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS); 518 519 /* For data packets rate info comes from the fw */ 520 if (ieee80211_is_data(hdr->frame_control) && sta) 521 goto out; 522 523 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE); 524 cmd->rate_n_flags = 525 cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 526 527 goto out; 528 } 529 530 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 531 532 if (info->control.hw_key) 533 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 534 535 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 536 537 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 538 539 /* Copy MAC header from skb into command buffer */ 540 memcpy(tx_cmd->hdr, hdr, hdrlen); 541 542 out: 543 return dev_cmd; 544 } 545 546 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 547 struct iwl_device_cmd *cmd) 548 { 549 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 550 551 memset(&skb_info->status, 0, sizeof(skb_info->status)); 552 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 553 554 skb_info->driver_data[1] = cmd; 555 } 556 557 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 558 struct ieee80211_tx_info *info, __le16 fc) 559 { 560 struct iwl_mvm_vif *mvmvif; 561 562 if (!iwl_mvm_is_dqa_supported(mvm)) 563 return info->hw_queue; 564 565 mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif); 566 567 switch (info->control.vif->type) { 568 case NL80211_IFTYPE_AP: 569 case NL80211_IFTYPE_ADHOC: 570 /* 571 * Handle legacy hostapd as well, where station will be added 572 * only just before sending the association response. 573 * Also take care of the case where we send a deauth to a 574 * station that we don't have, or similarly an association 575 * response (with non-success status) for a station we can't 576 * accept. 577 * Also, disassociate frames might happen, particular with 578 * reason 7 ("Class 3 frame received from nonassociated STA"). 579 */ 580 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc) || 581 ieee80211_is_deauth(fc) || ieee80211_is_assoc_resp(fc) || 582 ieee80211_is_disassoc(fc)) 583 return mvm->probe_queue; 584 if (info->hw_queue == info->control.vif->cab_queue) 585 return mvmvif->cab_queue; 586 587 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 588 "fc=0x%02x", le16_to_cpu(fc)); 589 return mvm->probe_queue; 590 case NL80211_IFTYPE_P2P_DEVICE: 591 if (ieee80211_is_mgmt(fc)) 592 return mvm->p2p_dev_queue; 593 if (info->hw_queue == info->control.vif->cab_queue) 594 return mvmvif->cab_queue; 595 596 WARN_ON_ONCE(1); 597 return mvm->p2p_dev_queue; 598 default: 599 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 600 return -1; 601 } 602 } 603 604 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 605 { 606 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 607 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 608 struct ieee80211_tx_info info; 609 struct iwl_device_cmd *dev_cmd; 610 u8 sta_id; 611 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 612 int queue; 613 614 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used 615 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel 616 * queue. STATION (HS2.0) uses the auxiliary context of the FW, 617 * and hence needs to be sent on the aux queue 618 */ 619 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 620 skb_info->control.vif->type == NL80211_IFTYPE_STATION) 621 skb_info->hw_queue = mvm->aux_queue; 622 623 memcpy(&info, skb->cb, sizeof(info)); 624 625 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 626 return -1; 627 628 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 629 (!info.control.vif || 630 info.hw_queue != info.control.vif->cab_queue))) 631 return -1; 632 633 queue = info.hw_queue; 634 635 /* 636 * If the interface on which the frame is sent is the P2P_DEVICE 637 * or an AP/GO interface use the broadcast station associated 638 * with it; otherwise if the interface is a managed interface 639 * use the AP station associated with it for multicast traffic 640 * (this is not possible for unicast packets as a TLDS discovery 641 * response are sent without a station entry); otherwise use the 642 * AUX station. 643 */ 644 sta_id = mvm->aux_sta.sta_id; 645 if (info.control.vif) { 646 struct iwl_mvm_vif *mvmvif = 647 iwl_mvm_vif_from_mac80211(info.control.vif); 648 649 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 650 info.control.vif->type == NL80211_IFTYPE_AP || 651 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 652 sta_id = mvmvif->bcast_sta.sta_id; 653 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, 654 hdr->frame_control); 655 if (queue < 0) 656 return -1; 657 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 658 is_multicast_ether_addr(hdr->addr1)) { 659 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id); 660 661 if (ap_sta_id != IWL_MVM_INVALID_STA) 662 sta_id = ap_sta_id; 663 } else if (iwl_mvm_is_dqa_supported(mvm) && 664 info.control.vif->type == NL80211_IFTYPE_MONITOR) { 665 queue = mvm->aux_queue; 666 } 667 } 668 669 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 670 671 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 672 if (!dev_cmd) 673 return -1; 674 675 /* From now on, we cannot access info->control */ 676 iwl_mvm_skb_prepare_status(skb, dev_cmd); 677 678 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 679 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 680 return -1; 681 } 682 683 /* 684 * Increase the pending frames counter, so that later when a reply comes 685 * in and the counter is decreased - we don't start getting negative 686 * values. 687 * Note that we don't need to make sure it isn't agg'd, since we're 688 * TXing non-sta 689 * For DQA mode - we shouldn't increase it though 690 */ 691 if (!iwl_mvm_is_dqa_supported(mvm)) 692 atomic_inc(&mvm->pending_frames[sta_id]); 693 694 return 0; 695 } 696 697 #ifdef CONFIG_INET 698 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 699 struct ieee80211_tx_info *info, 700 struct ieee80211_sta *sta, 701 struct sk_buff_head *mpdus_skb) 702 { 703 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 704 struct ieee80211_hdr *hdr = (void *)skb->data; 705 unsigned int mss = skb_shinfo(skb)->gso_size; 706 struct sk_buff *tmp, *next; 707 char cb[sizeof(skb->cb)]; 708 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 709 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 710 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 711 u16 snap_ip_tcp, pad, i = 0; 712 unsigned int dbg_max_amsdu_len; 713 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG; 714 u8 *qc, tid, txf; 715 716 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 717 tcp_hdrlen(skb); 718 719 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len); 720 721 if (!sta->max_amsdu_len || 722 !ieee80211_is_data_qos(hdr->frame_control) || 723 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) { 724 num_subframes = 1; 725 pad = 0; 726 goto segment; 727 } 728 729 qc = ieee80211_get_qos_ctl(hdr); 730 tid = *qc & IEEE80211_QOS_CTL_TID_MASK; 731 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 732 return -EINVAL; 733 734 /* 735 * Do not build AMSDU for IPv6 with extension headers. 736 * ask stack to segment and checkum the generated MPDUs for us. 737 */ 738 if (skb->protocol == htons(ETH_P_IPV6) && 739 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 740 IPPROTO_TCP) { 741 num_subframes = 1; 742 pad = 0; 743 netdev_features &= ~NETIF_F_CSUM_MASK; 744 goto segment; 745 } 746 747 /* 748 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 749 * during an BA session. 750 */ 751 if (info->flags & IEEE80211_TX_CTL_AMPDU && 752 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) { 753 num_subframes = 1; 754 pad = 0; 755 goto segment; 756 } 757 758 max_amsdu_len = sta->max_amsdu_len; 759 760 /* the Tx FIFO to which this A-MSDU will be routed */ 761 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; 762 763 /* 764 * Don't send an AMSDU that will be longer than the TXF. 765 * Add a security margin of 256 for the TX command + headers. 766 * We also want to have the start of the next packet inside the 767 * fifo to be able to send bursts. 768 */ 769 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 770 mvm->smem_cfg.lmac[0].txfifo_size[txf] - 256); 771 772 if (unlikely(dbg_max_amsdu_len)) 773 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 774 dbg_max_amsdu_len); 775 776 /* 777 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 778 * supported. This is a spec requirement (IEEE 802.11-2015 779 * section 8.7.3 NOTE 3). 780 */ 781 if (info->flags & IEEE80211_TX_CTL_AMPDU && 782 !sta->vht_cap.vht_supported) 783 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 784 785 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 786 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 787 pad = (4 - subf_len) & 0x3; 788 789 /* 790 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 791 * N * subf_len + (N - 1) * pad. 792 */ 793 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 794 if (num_subframes > 1) 795 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 796 797 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 798 tcp_hdrlen(skb) + skb->data_len; 799 800 /* 801 * Make sure we have enough TBs for the A-MSDU: 802 * 2 for each subframe 803 * 1 more for each fragment 804 * 1 more for the potential data in the header 805 */ 806 num_subframes = 807 min_t(unsigned int, num_subframes, 808 (mvm->trans->max_skb_frags - 1 - 809 skb_shinfo(skb)->nr_frags) / 2); 810 811 /* This skb fits in one single A-MSDU */ 812 if (num_subframes * mss >= tcp_payload_len) { 813 __skb_queue_tail(mpdus_skb, skb); 814 return 0; 815 } 816 817 /* 818 * Trick the segmentation function to make it 819 * create SKBs that can fit into one A-MSDU. 820 */ 821 segment: 822 skb_shinfo(skb)->gso_size = num_subframes * mss; 823 memcpy(cb, skb->cb, sizeof(cb)); 824 825 next = skb_gso_segment(skb, netdev_features); 826 skb_shinfo(skb)->gso_size = mss; 827 if (WARN_ON_ONCE(IS_ERR(next))) 828 return -EINVAL; 829 else if (next) 830 consume_skb(skb); 831 832 while (next) { 833 tmp = next; 834 next = tmp->next; 835 836 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 837 /* 838 * Compute the length of all the data added for the A-MSDU. 839 * This will be used to compute the length to write in the TX 840 * command. We have: SNAP + IP + TCP for n -1 subframes and 841 * ETH header for n subframes. 842 */ 843 tcp_payload_len = skb_tail_pointer(tmp) - 844 skb_transport_header(tmp) - 845 tcp_hdrlen(tmp) + tmp->data_len; 846 847 if (ipv4) 848 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 849 850 if (tcp_payload_len > mss) { 851 skb_shinfo(tmp)->gso_size = mss; 852 } else { 853 if (ieee80211_is_data_qos(hdr->frame_control)) { 854 qc = ieee80211_get_qos_ctl((void *)tmp->data); 855 856 if (ipv4) 857 ip_send_check(ip_hdr(tmp)); 858 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 859 } 860 skb_shinfo(tmp)->gso_size = 0; 861 } 862 863 tmp->prev = NULL; 864 tmp->next = NULL; 865 866 __skb_queue_tail(mpdus_skb, tmp); 867 i++; 868 } 869 870 return 0; 871 } 872 #else /* CONFIG_INET */ 873 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 874 struct ieee80211_tx_info *info, 875 struct ieee80211_sta *sta, 876 struct sk_buff_head *mpdus_skb) 877 { 878 /* Impossible to get TSO with CONFIG_INET */ 879 WARN_ON(1); 880 881 return -1; 882 } 883 #endif 884 885 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, 886 struct iwl_mvm_sta *mvm_sta, u8 tid, 887 struct sk_buff *skb) 888 { 889 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 890 u8 mac_queue = info->hw_queue; 891 struct sk_buff_head *deferred_tx_frames; 892 893 lockdep_assert_held(&mvm_sta->lock); 894 895 mvm_sta->deferred_traffic_tid_map |= BIT(tid); 896 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); 897 898 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; 899 900 skb_queue_tail(deferred_tx_frames, skb); 901 902 /* 903 * The first deferred frame should've stopped the MAC queues, so we 904 * should never get a second deferred frame for the RA/TID. 905 */ 906 if (!WARN(skb_queue_len(deferred_tx_frames) != 1, 907 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid, 908 skb_queue_len(deferred_tx_frames))) { 909 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); 910 schedule_work(&mvm->add_stream_wk); 911 } 912 } 913 914 /* Check if there are any timed-out TIDs on a given shared TXQ */ 915 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 916 { 917 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 918 unsigned long now = jiffies; 919 int tid; 920 921 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 922 return false; 923 924 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 925 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 926 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 927 return true; 928 } 929 930 return false; 931 } 932 933 /* 934 * Sets the fields in the Tx cmd that are crypto related 935 */ 936 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 937 struct ieee80211_tx_info *info, 938 struct ieee80211_sta *sta) 939 { 940 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 941 struct iwl_mvm_sta *mvmsta; 942 struct iwl_device_cmd *dev_cmd; 943 __le16 fc; 944 u16 seq_number = 0; 945 u8 tid = IWL_MAX_TID_COUNT; 946 u16 txq_id = info->hw_queue; 947 bool is_ampdu = false; 948 int hdrlen; 949 950 mvmsta = iwl_mvm_sta_from_mac80211(sta); 951 fc = hdr->frame_control; 952 hdrlen = ieee80211_hdrlen(fc); 953 954 if (WARN_ON_ONCE(!mvmsta)) 955 return -1; 956 957 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 958 return -1; 959 960 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 961 sta, mvmsta->sta_id); 962 if (!dev_cmd) 963 goto drop; 964 965 /* 966 * we handle that entirely ourselves -- for uAPSD the firmware 967 * will always send a notification, and for PS-Poll responses 968 * we'll notify mac80211 when getting frame status 969 */ 970 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 971 972 spin_lock(&mvmsta->lock); 973 974 /* nullfunc frames should go to the MGMT queue regardless of QOS, 975 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 976 * assignment of MGMT TID 977 */ 978 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 979 u8 *qc = NULL; 980 qc = ieee80211_get_qos_ctl(hdr); 981 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 982 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 983 goto drop_unlock_sta; 984 985 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 986 if (WARN_ON_ONCE(is_ampdu && 987 mvmsta->tid_data[tid].state != IWL_AGG_ON)) 988 goto drop_unlock_sta; 989 990 seq_number = mvmsta->tid_data[tid].seq_number; 991 seq_number &= IEEE80211_SCTL_SEQ; 992 993 if (!iwl_mvm_has_new_tx_api(mvm)) { 994 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 995 996 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 997 hdr->seq_ctrl |= cpu_to_le16(seq_number); 998 /* update the tx_cmd hdr as it was already copied */ 999 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1000 } 1001 } 1002 1003 if (iwl_mvm_is_dqa_supported(mvm) || is_ampdu) 1004 txq_id = mvmsta->tid_data[tid].txq_id; 1005 1006 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) { 1007 /* default to TID 0 for non-QoS packets */ 1008 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; 1009 1010 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; 1011 } 1012 1013 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1014 1015 /* Check if TXQ needs to be allocated or re-activated */ 1016 if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE || 1017 !mvmsta->tid_data[tid].is_tid_active) && 1018 iwl_mvm_is_dqa_supported(mvm)) { 1019 /* If TXQ needs to be allocated... */ 1020 if (txq_id == IWL_MVM_INVALID_QUEUE) { 1021 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); 1022 1023 /* 1024 * The frame is now deferred, and the worker scheduled 1025 * will re-allocate it, so we can free it for now. 1026 */ 1027 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1028 spin_unlock(&mvmsta->lock); 1029 return 0; 1030 } 1031 1032 /* queue should always be active in new TX path */ 1033 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1034 1035 /* If we are here - TXQ exists and needs to be re-activated */ 1036 spin_lock(&mvm->queue_info_lock); 1037 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1038 mvmsta->tid_data[tid].is_tid_active = true; 1039 spin_unlock(&mvm->queue_info_lock); 1040 1041 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n", 1042 txq_id); 1043 } 1044 1045 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) { 1046 /* Keep track of the time of the last frame for this RA/TID */ 1047 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1048 1049 /* 1050 * If we have timed-out TIDs - schedule the worker that will 1051 * reconfig the queues and update them 1052 * 1053 * Note that the mvm->queue_info_lock isn't being taken here in 1054 * order to not serialize the TX flow. This isn't dangerous 1055 * because scheduling mvm->add_stream_wk can't ruin the state, 1056 * and if we DON'T schedule it due to some race condition then 1057 * next TX we get here we will. 1058 */ 1059 if (unlikely(mvm->queue_info[txq_id].status == 1060 IWL_MVM_QUEUE_SHARED && 1061 iwl_mvm_txq_should_update(mvm, txq_id))) 1062 schedule_work(&mvm->add_stream_wk); 1063 } 1064 1065 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 1066 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 1067 1068 /* From now on, we cannot access info->control */ 1069 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1070 1071 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1072 goto drop_unlock_sta; 1073 1074 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1075 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1076 1077 spin_unlock(&mvmsta->lock); 1078 1079 /* Increase pending frames count if this isn't AMPDU or DQA queue */ 1080 if (!iwl_mvm_is_dqa_supported(mvm) && !is_ampdu) 1081 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); 1082 1083 return 0; 1084 1085 drop_unlock_sta: 1086 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1087 spin_unlock(&mvmsta->lock); 1088 drop: 1089 return -1; 1090 } 1091 1092 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 1093 struct ieee80211_sta *sta) 1094 { 1095 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1096 struct ieee80211_tx_info info; 1097 struct sk_buff_head mpdus_skbs; 1098 unsigned int payload_len; 1099 int ret; 1100 1101 if (WARN_ON_ONCE(!mvmsta)) 1102 return -1; 1103 1104 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1105 return -1; 1106 1107 memcpy(&info, skb->cb, sizeof(info)); 1108 1109 if (!skb_is_gso(skb)) 1110 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1111 1112 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1113 tcp_hdrlen(skb) + skb->data_len; 1114 1115 if (payload_len <= skb_shinfo(skb)->gso_size) 1116 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1117 1118 __skb_queue_head_init(&mpdus_skbs); 1119 1120 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1121 if (ret) 1122 return ret; 1123 1124 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1125 return ret; 1126 1127 while (!skb_queue_empty(&mpdus_skbs)) { 1128 skb = __skb_dequeue(&mpdus_skbs); 1129 1130 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1131 if (ret) { 1132 __skb_queue_purge(&mpdus_skbs); 1133 return ret; 1134 } 1135 } 1136 1137 return 0; 1138 } 1139 1140 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1141 struct ieee80211_sta *sta, u8 tid) 1142 { 1143 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1144 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1145 struct ieee80211_vif *vif = mvmsta->vif; 1146 u16 normalized_ssn; 1147 1148 lockdep_assert_held(&mvmsta->lock); 1149 1150 if ((tid_data->state == IWL_AGG_ON || 1151 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA || 1152 iwl_mvm_is_dqa_supported(mvm)) && 1153 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1154 /* 1155 * Now that this aggregation or DQA queue is empty tell 1156 * mac80211 so it knows we no longer have frames buffered for 1157 * the station on this TID (for the TIM bitmap calculation.) 1158 */ 1159 ieee80211_sta_set_buffered(sta, tid, false); 1160 } 1161 1162 /* 1163 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need 1164 * to align the wrap around of ssn so we compare relevant values. 1165 */ 1166 normalized_ssn = tid_data->ssn; 1167 if (mvm->trans->cfg->gen2) 1168 normalized_ssn &= 0xff; 1169 1170 if (normalized_ssn != tid_data->next_reclaimed) 1171 return; 1172 1173 switch (tid_data->state) { 1174 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1175 IWL_DEBUG_TX_QUEUES(mvm, 1176 "Can continue addBA flow ssn = next_recl = %d\n", 1177 tid_data->next_reclaimed); 1178 tid_data->state = IWL_AGG_STARTING; 1179 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1180 break; 1181 1182 case IWL_EMPTYING_HW_QUEUE_DELBA: 1183 IWL_DEBUG_TX_QUEUES(mvm, 1184 "Can continue DELBA flow ssn = next_recl = %d\n", 1185 tid_data->next_reclaimed); 1186 if (!iwl_mvm_is_dqa_supported(mvm)) { 1187 u8 mac80211_ac = tid_to_mac80211_ac[tid]; 1188 1189 iwl_mvm_disable_txq(mvm, tid_data->txq_id, 1190 vif->hw_queue[mac80211_ac], tid, 1191 CMD_ASYNC); 1192 } 1193 tid_data->state = IWL_AGG_OFF; 1194 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1195 break; 1196 1197 default: 1198 break; 1199 } 1200 } 1201 1202 #ifdef CONFIG_IWLWIFI_DEBUG 1203 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1204 { 1205 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1206 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1207 1208 switch (status & TX_STATUS_MSK) { 1209 case TX_STATUS_SUCCESS: 1210 return "SUCCESS"; 1211 TX_STATUS_POSTPONE(DELAY); 1212 TX_STATUS_POSTPONE(FEW_BYTES); 1213 TX_STATUS_POSTPONE(BT_PRIO); 1214 TX_STATUS_POSTPONE(QUIET_PERIOD); 1215 TX_STATUS_POSTPONE(CALC_TTAK); 1216 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1217 TX_STATUS_FAIL(SHORT_LIMIT); 1218 TX_STATUS_FAIL(LONG_LIMIT); 1219 TX_STATUS_FAIL(UNDERRUN); 1220 TX_STATUS_FAIL(DRAIN_FLOW); 1221 TX_STATUS_FAIL(RFKILL_FLUSH); 1222 TX_STATUS_FAIL(LIFE_EXPIRE); 1223 TX_STATUS_FAIL(DEST_PS); 1224 TX_STATUS_FAIL(HOST_ABORTED); 1225 TX_STATUS_FAIL(BT_RETRY); 1226 TX_STATUS_FAIL(STA_INVALID); 1227 TX_STATUS_FAIL(FRAG_DROPPED); 1228 TX_STATUS_FAIL(TID_DISABLE); 1229 TX_STATUS_FAIL(FIFO_FLUSHED); 1230 TX_STATUS_FAIL(SMALL_CF_POLL); 1231 TX_STATUS_FAIL(FW_DROP); 1232 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1233 } 1234 1235 return "UNKNOWN"; 1236 1237 #undef TX_STATUS_FAIL 1238 #undef TX_STATUS_POSTPONE 1239 } 1240 #endif /* CONFIG_IWLWIFI_DEBUG */ 1241 1242 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1243 enum nl80211_band band, 1244 struct ieee80211_tx_rate *r) 1245 { 1246 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1247 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1248 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1249 case RATE_MCS_CHAN_WIDTH_20: 1250 break; 1251 case RATE_MCS_CHAN_WIDTH_40: 1252 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1253 break; 1254 case RATE_MCS_CHAN_WIDTH_80: 1255 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1256 break; 1257 case RATE_MCS_CHAN_WIDTH_160: 1258 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1259 break; 1260 } 1261 if (rate_n_flags & RATE_MCS_SGI_MSK) 1262 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1263 if (rate_n_flags & RATE_MCS_HT_MSK) { 1264 r->flags |= IEEE80211_TX_RC_MCS; 1265 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1266 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1267 ieee80211_rate_set_vht( 1268 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1269 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1270 RATE_VHT_MCS_NSS_POS) + 1); 1271 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1272 } else { 1273 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1274 band); 1275 } 1276 } 1277 1278 /** 1279 * translate ucode response to mac80211 tx status control values 1280 */ 1281 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1282 struct ieee80211_tx_info *info) 1283 { 1284 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1285 1286 info->status.antenna = 1287 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1288 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1289 } 1290 1291 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1292 u32 status) 1293 { 1294 struct iwl_fw_dbg_trigger_tlv *trig; 1295 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1296 int i; 1297 1298 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) 1299 return; 1300 1301 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); 1302 status_trig = (void *)trig->data; 1303 1304 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) 1305 return; 1306 1307 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1308 /* don't collect on status 0 */ 1309 if (!status_trig->statuses[i].status) 1310 break; 1311 1312 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1313 continue; 1314 1315 iwl_mvm_fw_dbg_collect_trig(mvm, trig, 1316 "Tx status %d was received", 1317 status & TX_STATUS_MSK); 1318 break; 1319 } 1320 } 1321 1322 /** 1323 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1324 * @tx_resp: the Tx response from the fw (agg or non-agg) 1325 * 1326 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1327 * it can't know that everything will go well until the end of the AMPDU, it 1328 * can't know in advance the number of MPDUs that will be sent in the current 1329 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1330 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1331 * of the batch. This is why the SSN of the SCD is written at the end of the 1332 * whole struct at a variable offset. This function knows how to cope with the 1333 * variable offset and returns the SSN of the SCD. 1334 */ 1335 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1336 struct iwl_mvm_tx_resp *tx_resp) 1337 { 1338 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1339 tx_resp->frame_count) & 0xfff; 1340 } 1341 1342 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1343 struct iwl_rx_packet *pkt) 1344 { 1345 struct ieee80211_sta *sta; 1346 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1347 int txq_id = SEQ_TO_QUEUE(sequence); 1348 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1349 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1350 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1351 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1352 struct agg_tx_status *agg_status = 1353 iwl_mvm_get_agg_status(mvm, tx_resp); 1354 u32 status = le16_to_cpu(agg_status->status); 1355 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1356 struct iwl_mvm_sta *mvmsta; 1357 struct sk_buff_head skbs; 1358 u8 skb_freed = 0; 1359 u8 lq_color; 1360 u16 next_reclaimed, seq_ctl; 1361 bool is_ndp = false; 1362 1363 __skb_queue_head_init(&skbs); 1364 1365 if (iwl_mvm_has_new_tx_api(mvm)) 1366 txq_id = le16_to_cpu(tx_resp->tx_queue); 1367 1368 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1369 1370 /* we can free until ssn % q.n_bd not inclusive */ 1371 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1372 1373 while (!skb_queue_empty(&skbs)) { 1374 struct sk_buff *skb = __skb_dequeue(&skbs); 1375 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1376 1377 skb_freed++; 1378 1379 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1380 1381 memset(&info->status, 0, sizeof(info->status)); 1382 1383 /* inform mac80211 about what happened with the frame */ 1384 switch (status & TX_STATUS_MSK) { 1385 case TX_STATUS_SUCCESS: 1386 case TX_STATUS_DIRECT_DONE: 1387 info->flags |= IEEE80211_TX_STAT_ACK; 1388 break; 1389 case TX_STATUS_FAIL_DEST_PS: 1390 /* In DQA, the FW should have stopped the queue and not 1391 * return this status 1392 */ 1393 WARN_ON(iwl_mvm_is_dqa_supported(mvm)); 1394 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1395 break; 1396 default: 1397 break; 1398 } 1399 1400 iwl_mvm_tx_status_check_trigger(mvm, status); 1401 1402 info->status.rates[0].count = tx_resp->failure_frame + 1; 1403 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1404 info); 1405 info->status.status_driver_data[1] = 1406 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1407 1408 /* Single frame failure in an AMPDU queue => send BAR */ 1409 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1410 !(info->flags & IEEE80211_TX_STAT_ACK) && 1411 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) 1412 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1413 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1414 1415 /* W/A FW bug: seq_ctl is wrong when the status isn't success */ 1416 if (status != TX_STATUS_SUCCESS) { 1417 struct ieee80211_hdr *hdr = (void *)skb->data; 1418 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1419 } 1420 1421 if (unlikely(!seq_ctl)) { 1422 struct ieee80211_hdr *hdr = (void *)skb->data; 1423 1424 /* 1425 * If it is an NDP, we can't update next_reclaim since 1426 * its sequence control is 0. Note that for that same 1427 * reason, NDPs are never sent to A-MPDU'able queues 1428 * so that we can never have more than one freed frame 1429 * for a single Tx resonse (see WARN_ON below). 1430 */ 1431 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1432 is_ndp = true; 1433 } 1434 1435 /* 1436 * TODO: this is not accurate if we are freeing more than one 1437 * packet. 1438 */ 1439 info->status.tx_time = 1440 le16_to_cpu(tx_resp->wireless_media_time); 1441 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1442 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1443 info->status.status_driver_data[0] = 1444 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1445 1446 ieee80211_tx_status(mvm->hw, skb); 1447 } 1448 1449 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) { 1450 /* If this is an aggregation queue, we use the ssn since: 1451 * ssn = wifi seq_num % 256. 1452 * The seq_ctl is the sequence control of the packet to which 1453 * this Tx response relates. But if there is a hole in the 1454 * bitmap of the BA we received, this Tx response may allow to 1455 * reclaim the hole and all the subsequent packets that were 1456 * already acked. In that case, seq_ctl != ssn, and the next 1457 * packet to be reclaimed will be ssn and not seq_ctl. In that 1458 * case, several packets will be reclaimed even if 1459 * frame_count = 1. 1460 * 1461 * The ssn is the index (% 256) of the latest packet that has 1462 * treated (acked / dropped) + 1. 1463 */ 1464 next_reclaimed = ssn; 1465 } else { 1466 /* The next packet to be reclaimed is the one after this one */ 1467 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); 1468 } 1469 1470 IWL_DEBUG_TX_REPLY(mvm, 1471 "TXQ %d status %s (0x%08x)\n", 1472 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1473 1474 IWL_DEBUG_TX_REPLY(mvm, 1475 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1476 le32_to_cpu(tx_resp->initial_rate), 1477 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1478 ssn, next_reclaimed, seq_ctl); 1479 1480 rcu_read_lock(); 1481 1482 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1483 /* 1484 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1485 * the firmware while we still have packets for it in the Tx queues. 1486 */ 1487 if (WARN_ON_ONCE(!sta)) 1488 goto out; 1489 1490 if (!IS_ERR(sta)) { 1491 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1492 1493 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) { 1494 struct iwl_mvm_tid_data *tid_data = 1495 &mvmsta->tid_data[tid]; 1496 bool send_eosp_ndp = false; 1497 1498 spin_lock_bh(&mvmsta->lock); 1499 1500 if (!is_ndp) { 1501 tid_data->next_reclaimed = next_reclaimed; 1502 IWL_DEBUG_TX_REPLY(mvm, 1503 "Next reclaimed packet:%d\n", 1504 next_reclaimed); 1505 } else { 1506 IWL_DEBUG_TX_REPLY(mvm, 1507 "NDP - don't update next_reclaimed\n"); 1508 } 1509 1510 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1511 1512 if (mvmsta->sleep_tx_count) { 1513 mvmsta->sleep_tx_count--; 1514 if (mvmsta->sleep_tx_count && 1515 !iwl_mvm_tid_queued(mvm, tid_data)) { 1516 /* 1517 * The number of frames in the queue 1518 * dropped to 0 even if we sent less 1519 * frames than we thought we had on the 1520 * Tx queue. 1521 * This means we had holes in the BA 1522 * window that we just filled, ask 1523 * mac80211 to send EOSP since the 1524 * firmware won't know how to do that. 1525 * Send NDP and the firmware will send 1526 * EOSP notification that will trigger 1527 * a call to ieee80211_sta_eosp(). 1528 */ 1529 send_eosp_ndp = true; 1530 } 1531 } 1532 1533 spin_unlock_bh(&mvmsta->lock); 1534 if (send_eosp_ndp) { 1535 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1536 IEEE80211_FRAME_RELEASE_UAPSD, 1537 1, tid, false, false); 1538 mvmsta->sleep_tx_count = 0; 1539 ieee80211_send_eosp_nullfunc(sta, tid); 1540 } 1541 } 1542 1543 if (mvmsta->next_status_eosp) { 1544 mvmsta->next_status_eosp = false; 1545 ieee80211_sta_eosp(sta); 1546 } 1547 } else { 1548 mvmsta = NULL; 1549 } 1550 1551 /* 1552 * If the txq is not an AMPDU queue, there is no chance we freed 1553 * several skbs. Check that out... 1554 */ 1555 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) 1556 goto out; 1557 1558 /* We can't free more than one frame at once on a shared queue */ 1559 WARN_ON(skb_freed > 1); 1560 1561 /* If we have still frames for this STA nothing to do here */ 1562 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) 1563 goto out; 1564 1565 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { 1566 1567 /* 1568 * If there are no pending frames for this STA and 1569 * the tx to this station is not disabled, notify 1570 * mac80211 that this station can now wake up in its 1571 * STA table. 1572 * If mvmsta is not NULL, sta is valid. 1573 */ 1574 1575 spin_lock_bh(&mvmsta->lock); 1576 1577 if (!mvmsta->disable_tx) 1578 ieee80211_sta_block_awake(mvm->hw, sta, false); 1579 1580 spin_unlock_bh(&mvmsta->lock); 1581 } 1582 1583 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { 1584 /* 1585 * We are draining and this was the last packet - pre_rcu_remove 1586 * has been called already. We might be after the 1587 * synchronize_net already. 1588 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. 1589 */ 1590 set_bit(sta_id, mvm->sta_drained); 1591 schedule_work(&mvm->sta_drained_wk); 1592 } 1593 1594 out: 1595 rcu_read_unlock(); 1596 } 1597 1598 #ifdef CONFIG_IWLWIFI_DEBUG 1599 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1600 static const char *iwl_get_agg_tx_status(u16 status) 1601 { 1602 switch (status & AGG_TX_STATE_STATUS_MSK) { 1603 AGG_TX_STATE_(TRANSMITTED); 1604 AGG_TX_STATE_(UNDERRUN); 1605 AGG_TX_STATE_(BT_PRIO); 1606 AGG_TX_STATE_(FEW_BYTES); 1607 AGG_TX_STATE_(ABORT); 1608 AGG_TX_STATE_(LAST_SENT_TTL); 1609 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1610 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1611 AGG_TX_STATE_(SCD_QUERY); 1612 AGG_TX_STATE_(TEST_BAD_CRC32); 1613 AGG_TX_STATE_(RESPONSE); 1614 AGG_TX_STATE_(DUMP_TX); 1615 AGG_TX_STATE_(DELAY_TX); 1616 } 1617 1618 return "UNKNOWN"; 1619 } 1620 1621 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1622 struct iwl_rx_packet *pkt) 1623 { 1624 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1625 struct agg_tx_status *frame_status = 1626 iwl_mvm_get_agg_status(mvm, tx_resp); 1627 int i; 1628 1629 for (i = 0; i < tx_resp->frame_count; i++) { 1630 u16 fstatus = le16_to_cpu(frame_status[i].status); 1631 1632 IWL_DEBUG_TX_REPLY(mvm, 1633 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1634 iwl_get_agg_tx_status(fstatus), 1635 fstatus & AGG_TX_STATE_STATUS_MSK, 1636 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1637 AGG_TX_STATE_TRY_CNT_POS, 1638 le16_to_cpu(frame_status[i].sequence)); 1639 } 1640 } 1641 #else 1642 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1643 struct iwl_rx_packet *pkt) 1644 {} 1645 #endif /* CONFIG_IWLWIFI_DEBUG */ 1646 1647 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1648 struct iwl_rx_packet *pkt) 1649 { 1650 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1651 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1652 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1653 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1654 struct iwl_mvm_sta *mvmsta; 1655 int queue = SEQ_TO_QUEUE(sequence); 1656 1657 if (WARN_ON_ONCE(queue < mvm->first_agg_queue && 1658 (!iwl_mvm_is_dqa_supported(mvm) || 1659 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))) 1660 return; 1661 1662 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) 1663 return; 1664 1665 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1666 1667 rcu_read_lock(); 1668 1669 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1670 1671 if (!WARN_ON_ONCE(!mvmsta)) { 1672 mvmsta->tid_data[tid].rate_n_flags = 1673 le32_to_cpu(tx_resp->initial_rate); 1674 mvmsta->tid_data[tid].tx_time = 1675 le16_to_cpu(tx_resp->wireless_media_time); 1676 mvmsta->tid_data[tid].lq_color = 1677 (tx_resp->tlc_info & TX_RES_RATE_TABLE_COLOR_MSK) >> 1678 TX_RES_RATE_TABLE_COLOR_POS; 1679 } 1680 1681 rcu_read_unlock(); 1682 } 1683 1684 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1685 { 1686 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1687 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1688 1689 if (tx_resp->frame_count == 1) 1690 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1691 else 1692 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1693 } 1694 1695 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1696 int txq, int index, 1697 struct ieee80211_tx_info *ba_info, u32 rate) 1698 { 1699 struct sk_buff_head reclaimed_skbs; 1700 struct iwl_mvm_tid_data *tid_data; 1701 struct ieee80211_sta *sta; 1702 struct iwl_mvm_sta *mvmsta; 1703 struct sk_buff *skb; 1704 int freed; 1705 1706 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1707 tid >= IWL_MAX_TID_COUNT, 1708 "sta_id %d tid %d", sta_id, tid)) 1709 return; 1710 1711 rcu_read_lock(); 1712 1713 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1714 1715 /* Reclaiming frames for a station that has been deleted ? */ 1716 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1717 rcu_read_unlock(); 1718 return; 1719 } 1720 1721 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1722 tid_data = &mvmsta->tid_data[tid]; 1723 1724 if (tid_data->txq_id != txq) { 1725 IWL_ERR(mvm, 1726 "invalid BA notification: Q %d, tid %d\n", 1727 tid_data->txq_id, tid); 1728 rcu_read_unlock(); 1729 return; 1730 } 1731 1732 spin_lock_bh(&mvmsta->lock); 1733 1734 __skb_queue_head_init(&reclaimed_skbs); 1735 1736 /* 1737 * Release all TFDs before the SSN, i.e. all TFDs in front of 1738 * block-ack window (we assume that they've been successfully 1739 * transmitted ... if not, it's too late anyway). 1740 */ 1741 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1742 1743 tid_data->next_reclaimed = index; 1744 1745 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1746 1747 freed = 0; 1748 1749 /* pack lq color from tid_data along the reduced txp */ 1750 ba_info->status.status_driver_data[0] = 1751 RS_DRV_DATA_PACK(tid_data->lq_color, 1752 ba_info->status.status_driver_data[0]); 1753 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1754 1755 skb_queue_walk(&reclaimed_skbs, skb) { 1756 struct ieee80211_hdr *hdr = (void *)skb->data; 1757 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1758 1759 if (ieee80211_is_data_qos(hdr->frame_control)) 1760 freed++; 1761 else 1762 WARN_ON_ONCE(1); 1763 1764 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1765 1766 memset(&info->status, 0, sizeof(info->status)); 1767 /* Packet was transmitted successfully, failures come as single 1768 * frames because before failing a frame the firmware transmits 1769 * it without aggregation at least once. 1770 */ 1771 info->flags |= IEEE80211_TX_STAT_ACK; 1772 1773 /* this is the first skb we deliver in this batch */ 1774 /* put the rate scaling data there */ 1775 if (freed == 1) { 1776 info->flags |= IEEE80211_TX_STAT_AMPDU; 1777 memcpy(&info->status, &ba_info->status, 1778 sizeof(ba_info->status)); 1779 iwl_mvm_hwrate_to_tx_status(rate, info); 1780 } 1781 } 1782 1783 spin_unlock_bh(&mvmsta->lock); 1784 1785 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1786 * possible (i.e. first MPDU in the aggregation wasn't acked) 1787 * Still it's important to update RS about sent vs. acked. 1788 */ 1789 if (skb_queue_empty(&reclaimed_skbs)) { 1790 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1791 1792 if (mvmsta->vif) 1793 chanctx_conf = 1794 rcu_dereference(mvmsta->vif->chanctx_conf); 1795 1796 if (WARN_ON_ONCE(!chanctx_conf)) 1797 goto out; 1798 1799 ba_info->band = chanctx_conf->def.chan->band; 1800 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1801 1802 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); 1803 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1804 } 1805 1806 out: 1807 rcu_read_unlock(); 1808 1809 while (!skb_queue_empty(&reclaimed_skbs)) { 1810 skb = __skb_dequeue(&reclaimed_skbs); 1811 ieee80211_tx_status(mvm->hw, skb); 1812 } 1813 } 1814 1815 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1816 { 1817 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1818 int sta_id, tid, txq, index; 1819 struct ieee80211_tx_info ba_info = {}; 1820 struct iwl_mvm_ba_notif *ba_notif; 1821 struct iwl_mvm_tid_data *tid_data; 1822 struct iwl_mvm_sta *mvmsta; 1823 1824 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1825 1826 if (iwl_mvm_has_new_tx_api(mvm)) { 1827 struct iwl_mvm_compressed_ba_notif *ba_res = 1828 (void *)pkt->data; 1829 int i; 1830 1831 sta_id = ba_res->sta_id; 1832 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1833 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1834 ba_info.status.tx_time = 1835 (u16)le32_to_cpu(ba_res->wireless_time); 1836 ba_info.status.status_driver_data[0] = 1837 (void *)(uintptr_t)ba_res->reduced_txp; 1838 1839 if (!le16_to_cpu(ba_res->tfd_cnt)) 1840 goto out; 1841 1842 /* Free per TID */ 1843 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { 1844 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1845 &ba_res->tfd[i]; 1846 1847 iwl_mvm_tx_reclaim(mvm, sta_id, ba_tfd->tid, 1848 (int)(le16_to_cpu(ba_tfd->q_num)), 1849 le16_to_cpu(ba_tfd->tfd_index), 1850 &ba_info, 1851 le32_to_cpu(ba_res->tx_rate)); 1852 } 1853 1854 out: 1855 IWL_DEBUG_TX_REPLY(mvm, 1856 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1857 sta_id, le32_to_cpu(ba_res->flags), 1858 le16_to_cpu(ba_res->txed), 1859 le16_to_cpu(ba_res->done)); 1860 return; 1861 } 1862 1863 ba_notif = (void *)pkt->data; 1864 sta_id = ba_notif->sta_id; 1865 tid = ba_notif->tid; 1866 /* "flow" corresponds to Tx queue */ 1867 txq = le16_to_cpu(ba_notif->scd_flow); 1868 /* "ssn" is start of block-ack Tx window, corresponds to index 1869 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1870 index = le16_to_cpu(ba_notif->scd_ssn); 1871 1872 rcu_read_lock(); 1873 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1874 if (WARN_ON_ONCE(!mvmsta)) { 1875 rcu_read_unlock(); 1876 return; 1877 } 1878 1879 tid_data = &mvmsta->tid_data[tid]; 1880 1881 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1882 ba_info.status.ampdu_len = ba_notif->txed; 1883 ba_info.status.tx_time = tid_data->tx_time; 1884 ba_info.status.status_driver_data[0] = 1885 (void *)(uintptr_t)ba_notif->reduced_txp; 1886 1887 rcu_read_unlock(); 1888 1889 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1890 tid_data->rate_n_flags); 1891 1892 IWL_DEBUG_TX_REPLY(mvm, 1893 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1894 ba_notif->sta_addr, ba_notif->sta_id); 1895 1896 IWL_DEBUG_TX_REPLY(mvm, 1897 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1898 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1899 le64_to_cpu(ba_notif->bitmap), txq, index, 1900 ba_notif->txed, ba_notif->txed_2_done); 1901 1902 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1903 ba_notif->reduced_txp); 1904 } 1905 1906 /* 1907 * Note that there are transports that buffer frames before they reach 1908 * the firmware. This means that after flush_tx_path is called, the 1909 * queue might not be empty. The race-free way to handle this is to: 1910 * 1) set the station as draining 1911 * 2) flush the Tx path 1912 * 3) wait for the transport queues to be empty 1913 */ 1914 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 1915 { 1916 int ret; 1917 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 1918 .queues_ctl = cpu_to_le32(tfd_msk), 1919 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 1920 }; 1921 1922 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1923 1924 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1925 sizeof(flush_cmd), &flush_cmd); 1926 if (ret) 1927 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1928 return ret; 1929 } 1930 1931 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, 1932 u16 tids, u32 flags) 1933 { 1934 int ret; 1935 struct iwl_tx_path_flush_cmd flush_cmd = { 1936 .sta_id = cpu_to_le32(sta_id), 1937 .tid_mask = cpu_to_le16(tids), 1938 }; 1939 1940 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 1941 1942 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1943 sizeof(flush_cmd), &flush_cmd); 1944 if (ret) 1945 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1946 return ret; 1947 } 1948 1949 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags) 1950 { 1951 struct iwl_mvm_int_sta *int_sta = sta; 1952 struct iwl_mvm_sta *mvm_sta = sta; 1953 1954 if (iwl_mvm_has_new_tx_api(mvm)) { 1955 if (internal) 1956 return iwl_mvm_flush_sta_tids(mvm, int_sta->sta_id, 1957 BIT(IWL_MGMT_TID), flags); 1958 1959 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 1960 0xFF, flags); 1961 } 1962 1963 if (internal) 1964 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 1965 flags); 1966 1967 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags); 1968 } 1969