1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 #include <linux/ieee80211.h> 68 #include <linux/etherdevice.h> 69 #include <linux/tcp.h> 70 #include <net/ip.h> 71 #include <net/ipv6.h> 72 73 #include "iwl-trans.h" 74 #include "iwl-eeprom-parse.h" 75 #include "mvm.h" 76 #include "sta.h" 77 78 static void 79 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, 80 u16 tid, u16 ssn) 81 { 82 struct iwl_fw_dbg_trigger_tlv *trig; 83 struct iwl_fw_dbg_trigger_ba *ba_trig; 84 85 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA)) 86 return; 87 88 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA); 89 ba_trig = (void *)trig->data; 90 91 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig)) 92 return; 93 94 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) 95 return; 96 97 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 98 "BAR sent to %pM, tid %d, ssn %d", 99 addr, tid, ssn); 100 } 101 102 #define OPT_HDR(type, skb, off) \ 103 (type *)(skb_network_header(skb) + (off)) 104 105 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, 106 struct ieee80211_hdr *hdr, 107 struct ieee80211_tx_info *info, 108 u16 offload_assist) 109 { 110 #if IS_ENABLED(CONFIG_INET) 111 u16 mh_len = ieee80211_hdrlen(hdr->frame_control); 112 u8 protocol = 0; 113 114 /* 115 * Do not compute checksum if already computed or if transport will 116 * compute it 117 */ 118 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD) 119 goto out; 120 121 /* We do not expect to be requested to csum stuff we do not support */ 122 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || 123 (skb->protocol != htons(ETH_P_IP) && 124 skb->protocol != htons(ETH_P_IPV6)), 125 "No support for requested checksum\n")) { 126 skb_checksum_help(skb); 127 goto out; 128 } 129 130 if (skb->protocol == htons(ETH_P_IP)) { 131 protocol = ip_hdr(skb)->protocol; 132 } else { 133 #if IS_ENABLED(CONFIG_IPV6) 134 struct ipv6hdr *ipv6h = 135 (struct ipv6hdr *)skb_network_header(skb); 136 unsigned int off = sizeof(*ipv6h); 137 138 protocol = ipv6h->nexthdr; 139 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { 140 struct ipv6_opt_hdr *hp; 141 142 /* only supported extension headers */ 143 if (protocol != NEXTHDR_ROUTING && 144 protocol != NEXTHDR_HOP && 145 protocol != NEXTHDR_DEST) { 146 skb_checksum_help(skb); 147 goto out; 148 } 149 150 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); 151 protocol = hp->nexthdr; 152 off += ipv6_optlen(hp); 153 } 154 /* if we get here - protocol now should be TCP/UDP */ 155 #endif 156 } 157 158 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { 159 WARN_ON_ONCE(1); 160 skb_checksum_help(skb); 161 goto out; 162 } 163 164 /* enable L4 csum */ 165 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); 166 167 /* 168 * Set offset to IP header (snap). 169 * We don't support tunneling so no need to take care of inner header. 170 * Size is in words. 171 */ 172 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); 173 174 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ 175 if (skb->protocol == htons(ETH_P_IP) && 176 (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) { 177 ip_hdr(skb)->check = 0; 178 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); 179 } 180 181 /* reset UDP/TCP header csum */ 182 if (protocol == IPPROTO_TCP) 183 tcp_hdr(skb)->check = 0; 184 else 185 udp_hdr(skb)->check = 0; 186 187 /* 188 * mac header len should include IV, size is in words unless 189 * the IV is added by the firmware like in WEP. 190 * In new Tx API, the IV is always added by the firmware. 191 */ 192 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && 193 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && 194 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) 195 mh_len += info->control.hw_key->iv_len; 196 mh_len /= 2; 197 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; 198 199 out: 200 #endif 201 return offload_assist; 202 } 203 204 /* 205 * Sets most of the Tx cmd's fields 206 */ 207 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, 208 struct iwl_tx_cmd *tx_cmd, 209 struct ieee80211_tx_info *info, u8 sta_id) 210 { 211 struct ieee80211_hdr *hdr = (void *)skb->data; 212 __le16 fc = hdr->frame_control; 213 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); 214 u32 len = skb->len + FCS_LEN; 215 u16 offload_assist = 0; 216 u8 ac; 217 218 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 219 tx_flags |= TX_CMD_FLG_ACK; 220 else 221 tx_flags &= ~TX_CMD_FLG_ACK; 222 223 if (ieee80211_is_probe_resp(fc)) 224 tx_flags |= TX_CMD_FLG_TSF; 225 226 if (ieee80211_has_morefrags(fc)) 227 tx_flags |= TX_CMD_FLG_MORE_FRAG; 228 229 if (ieee80211_is_data_qos(fc)) { 230 u8 *qc = ieee80211_get_qos_ctl(hdr); 231 tx_cmd->tid_tspec = qc[0] & 0xf; 232 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 233 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 234 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 235 } else if (ieee80211_is_back_req(fc)) { 236 struct ieee80211_bar *bar = (void *)skb->data; 237 u16 control = le16_to_cpu(bar->control); 238 u16 ssn = le16_to_cpu(bar->start_seq_num); 239 240 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; 241 tx_cmd->tid_tspec = (control & 242 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 243 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 244 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); 245 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, 246 ssn); 247 } else { 248 tx_cmd->tid_tspec = IWL_TID_NON_QOS; 249 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 250 tx_flags |= TX_CMD_FLG_SEQ_CTL; 251 else 252 tx_flags &= ~TX_CMD_FLG_SEQ_CTL; 253 } 254 255 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */ 256 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) 257 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; 258 else 259 ac = tid_to_mac80211_ac[0]; 260 261 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << 262 TX_CMD_FLG_BT_PRIO_POS; 263 264 if (ieee80211_is_mgmt(fc)) { 265 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) 266 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); 267 else if (ieee80211_is_action(fc)) 268 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 269 else 270 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 271 272 /* The spec allows Action frames in A-MPDU, we don't support 273 * it 274 */ 275 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); 276 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { 277 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); 278 } else { 279 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); 280 } 281 282 if (ieee80211_is_data(fc) && len > mvm->rts_threshold && 283 !is_multicast_ether_addr(ieee80211_get_DA(hdr))) 284 tx_flags |= TX_CMD_FLG_PROT_REQUIRE; 285 286 if (fw_has_capa(&mvm->fw->ucode_capa, 287 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && 288 ieee80211_action_contains_tpc(skb)) 289 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; 290 291 tx_cmd->tx_flags = cpu_to_le32(tx_flags); 292 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ 293 tx_cmd->len = cpu_to_le16((u16)skb->len); 294 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 295 tx_cmd->sta_id = sta_id; 296 297 /* padding is inserted later in transport */ 298 if (ieee80211_hdrlen(fc) % 4 && 299 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 300 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 301 302 tx_cmd->offload_assist |= 303 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info, 304 offload_assist)); 305 } 306 307 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, 308 struct ieee80211_tx_info *info, 309 struct ieee80211_sta *sta) 310 { 311 int rate_idx; 312 u8 rate_plcp; 313 u32 rate_flags; 314 315 /* HT rate doesn't make sense for a non data frame */ 316 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, 317 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n", 318 info->control.rates[0].flags, 319 info->control.rates[0].idx); 320 321 rate_idx = info->control.rates[0].idx; 322 /* if the rate isn't a well known legacy rate, take the lowest one */ 323 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) 324 rate_idx = rate_lowest_index( 325 &mvm->nvm_data->bands[info->band], sta); 326 327 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ 328 if (info->band == NL80211_BAND_5GHZ) 329 rate_idx += IWL_FIRST_OFDM_RATE; 330 331 /* For 2.4 GHZ band, check that there is no need to remap */ 332 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 333 334 /* Get PLCP rate for tx_cmd->rate_n_flags */ 335 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); 336 337 if (info->band == NL80211_BAND_2GHZ && 338 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) 339 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; 340 else 341 rate_flags = 342 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; 343 344 /* Set CCK flag as needed */ 345 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) 346 rate_flags |= RATE_MCS_CCK_MSK; 347 348 return (u32)rate_plcp | rate_flags; 349 } 350 351 /* 352 * Sets the fields in the Tx cmd that are rate related 353 */ 354 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, 355 struct ieee80211_tx_info *info, 356 struct ieee80211_sta *sta, __le16 fc) 357 { 358 /* Set retry limit on RTS packets */ 359 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; 360 361 /* Set retry limit on DATA packets and Probe Responses*/ 362 if (ieee80211_is_probe_resp(fc)) { 363 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; 364 tx_cmd->rts_retry_limit = 365 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); 366 } else if (ieee80211_is_back_req(fc)) { 367 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; 368 } else { 369 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; 370 } 371 372 /* 373 * for data packets, rate info comes from the table inside the fw. This 374 * table is controlled by LINK_QUALITY commands 375 */ 376 377 if (ieee80211_is_data(fc) && sta) { 378 tx_cmd->initial_rate_index = 0; 379 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); 380 return; 381 } else if (ieee80211_is_back_req(fc)) { 382 tx_cmd->tx_flags |= 383 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); 384 } 385 386 mvm->mgmt_last_antenna_idx = 387 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 388 mvm->mgmt_last_antenna_idx); 389 390 /* Set the rate in the TX cmd */ 391 tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 392 } 393 394 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, 395 u8 *crypto_hdr) 396 { 397 struct ieee80211_key_conf *keyconf = info->control.hw_key; 398 u64 pn; 399 400 pn = atomic64_inc_return(&keyconf->tx_pn); 401 crypto_hdr[0] = pn; 402 crypto_hdr[2] = 0; 403 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); 404 crypto_hdr[1] = pn >> 8; 405 crypto_hdr[4] = pn >> 16; 406 crypto_hdr[5] = pn >> 24; 407 crypto_hdr[6] = pn >> 32; 408 crypto_hdr[7] = pn >> 40; 409 } 410 411 /* 412 * Sets the fields in the Tx cmd that are crypto related 413 */ 414 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, 415 struct ieee80211_tx_info *info, 416 struct iwl_tx_cmd *tx_cmd, 417 struct sk_buff *skb_frag, 418 int hdrlen) 419 { 420 struct ieee80211_key_conf *keyconf = info->control.hw_key; 421 u8 *crypto_hdr = skb_frag->data + hdrlen; 422 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM; 423 u64 pn; 424 425 switch (keyconf->cipher) { 426 case WLAN_CIPHER_SUITE_CCMP: 427 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); 428 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 429 break; 430 431 case WLAN_CIPHER_SUITE_TKIP: 432 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; 433 pn = atomic64_inc_return(&keyconf->tx_pn); 434 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); 435 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); 436 break; 437 438 case WLAN_CIPHER_SUITE_WEP104: 439 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; 440 /* fall through */ 441 case WLAN_CIPHER_SUITE_WEP40: 442 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | 443 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & 444 TX_CMD_SEC_WEP_KEY_IDX_MSK); 445 446 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); 447 break; 448 case WLAN_CIPHER_SUITE_GCMP: 449 case WLAN_CIPHER_SUITE_GCMP_256: 450 type = TX_CMD_SEC_GCMP; 451 /* Fall through */ 452 case WLAN_CIPHER_SUITE_CCMP_256: 453 /* TODO: Taking the key from the table might introduce a race 454 * when PTK rekeying is done, having an old packets with a PN 455 * based on the old key but the message encrypted with a new 456 * one. 457 * Need to handle this. 458 */ 459 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE; 460 tx_cmd->key[0] = keyconf->hw_key_idx; 461 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); 462 break; 463 default: 464 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; 465 } 466 } 467 468 /* 469 * Allocates and sets the Tx cmd the driver data pointers in the skb 470 */ 471 static struct iwl_device_cmd * 472 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, 473 struct ieee80211_tx_info *info, int hdrlen, 474 struct ieee80211_sta *sta, u8 sta_id) 475 { 476 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 477 struct iwl_device_cmd *dev_cmd; 478 struct iwl_tx_cmd *tx_cmd; 479 480 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); 481 482 if (unlikely(!dev_cmd)) 483 return NULL; 484 485 /* Make sure we zero enough of dev_cmd */ 486 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd)); 487 488 memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd)); 489 dev_cmd->hdr.cmd = TX_CMD; 490 491 if (iwl_mvm_has_new_tx_api(mvm)) { 492 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; 493 u16 offload_assist = 0; 494 495 if (ieee80211_is_data_qos(hdr->frame_control)) { 496 u8 *qc = ieee80211_get_qos_ctl(hdr); 497 498 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 499 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); 500 } 501 502 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, 503 offload_assist); 504 505 /* padding is inserted later in transport */ 506 if (ieee80211_hdrlen(hdr->frame_control) % 4 && 507 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) 508 offload_assist |= BIT(TX_CMD_OFFLD_PAD); 509 510 cmd->offload_assist |= cpu_to_le16(offload_assist); 511 512 /* Total # bytes to be transmitted */ 513 cmd->len = cpu_to_le16((u16)skb->len); 514 515 /* Copy MAC header from skb into command buffer */ 516 memcpy(cmd->hdr, hdr, hdrlen); 517 518 if (!info->control.hw_key) 519 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS); 520 521 /* For data packets rate info comes from the fw */ 522 if (ieee80211_is_data(hdr->frame_control) && sta) 523 goto out; 524 525 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE); 526 cmd->rate_n_flags = 527 cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); 528 529 goto out; 530 } 531 532 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; 533 534 if (info->control.hw_key) 535 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); 536 537 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); 538 539 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); 540 541 /* Copy MAC header from skb into command buffer */ 542 memcpy(tx_cmd->hdr, hdr, hdrlen); 543 544 out: 545 return dev_cmd; 546 } 547 548 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, 549 struct iwl_device_cmd *cmd) 550 { 551 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 552 553 memset(&skb_info->status, 0, sizeof(skb_info->status)); 554 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); 555 556 skb_info->driver_data[1] = cmd; 557 } 558 559 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, 560 struct ieee80211_tx_info *info, __le16 fc) 561 { 562 struct iwl_mvm_vif *mvmvif; 563 564 mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif); 565 566 switch (info->control.vif->type) { 567 case NL80211_IFTYPE_AP: 568 case NL80211_IFTYPE_ADHOC: 569 /* 570 * Non-bufferable frames use the broadcast station, thus they 571 * use the probe queue. 572 * Also take care of the case where we send a deauth to a 573 * station that we don't have, or similarly an association 574 * response (with non-success status) for a station we can't 575 * accept. 576 * Also, disassociate frames might happen, particular with 577 * reason 7 ("Class 3 frame received from nonassociated STA"). 578 */ 579 if (ieee80211_is_mgmt(fc) && 580 (!ieee80211_is_bufferable_mmpdu(fc) || 581 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) 582 return mvm->probe_queue; 583 if (info->hw_queue == info->control.vif->cab_queue) 584 return mvmvif->cab_queue; 585 586 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, 587 "fc=0x%02x", le16_to_cpu(fc)); 588 return mvm->probe_queue; 589 case NL80211_IFTYPE_P2P_DEVICE: 590 if (ieee80211_is_mgmt(fc)) 591 return mvm->p2p_dev_queue; 592 if (info->hw_queue == info->control.vif->cab_queue) 593 return mvmvif->cab_queue; 594 595 WARN_ON_ONCE(1); 596 return mvm->p2p_dev_queue; 597 default: 598 WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); 599 return -1; 600 } 601 } 602 603 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) 604 { 605 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 606 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); 607 struct ieee80211_tx_info info; 608 struct iwl_device_cmd *dev_cmd; 609 u8 sta_id; 610 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 611 int queue; 612 613 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used 614 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel 615 * queue. STATION (HS2.0) uses the auxiliary context of the FW, 616 * and hence needs to be sent on the aux queue 617 */ 618 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 619 skb_info->control.vif->type == NL80211_IFTYPE_STATION) 620 skb_info->hw_queue = mvm->aux_queue; 621 622 memcpy(&info, skb->cb, sizeof(info)); 623 624 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) 625 return -1; 626 627 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && 628 (!info.control.vif || 629 info.hw_queue != info.control.vif->cab_queue))) 630 return -1; 631 632 queue = info.hw_queue; 633 634 /* 635 * If the interface on which the frame is sent is the P2P_DEVICE 636 * or an AP/GO interface use the broadcast station associated 637 * with it; otherwise if the interface is a managed interface 638 * use the AP station associated with it for multicast traffic 639 * (this is not possible for unicast packets as a TLDS discovery 640 * response are sent without a station entry); otherwise use the 641 * AUX station. 642 */ 643 sta_id = mvm->aux_sta.sta_id; 644 if (info.control.vif) { 645 struct iwl_mvm_vif *mvmvif = 646 iwl_mvm_vif_from_mac80211(info.control.vif); 647 648 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || 649 info.control.vif->type == NL80211_IFTYPE_AP || 650 info.control.vif->type == NL80211_IFTYPE_ADHOC) { 651 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE) 652 sta_id = mvmvif->bcast_sta.sta_id; 653 else 654 sta_id = mvmvif->mcast_sta.sta_id; 655 656 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, 657 hdr->frame_control); 658 if (queue < 0) 659 return -1; 660 } else if (info.control.vif->type == NL80211_IFTYPE_STATION && 661 is_multicast_ether_addr(hdr->addr1)) { 662 u8 ap_sta_id = READ_ONCE(mvmvif->ap_sta_id); 663 664 if (ap_sta_id != IWL_MVM_INVALID_STA) 665 sta_id = ap_sta_id; 666 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) { 667 queue = mvm->snif_queue; 668 sta_id = mvm->snif_sta.sta_id; 669 } 670 } 671 672 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); 673 674 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); 675 if (!dev_cmd) 676 return -1; 677 678 /* From now on, we cannot access info->control */ 679 iwl_mvm_skb_prepare_status(skb, dev_cmd); 680 681 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { 682 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 683 return -1; 684 } 685 686 return 0; 687 } 688 689 #ifdef CONFIG_INET 690 691 static int 692 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes, 693 netdev_features_t netdev_flags, 694 struct sk_buff_head *mpdus_skb) 695 { 696 struct sk_buff *tmp, *next; 697 struct ieee80211_hdr *hdr = (void *)skb->data; 698 char cb[sizeof(skb->cb)]; 699 u16 i = 0; 700 unsigned int tcp_payload_len; 701 unsigned int mss = skb_shinfo(skb)->gso_size; 702 bool ipv4 = (skb->protocol == htons(ETH_P_IP)); 703 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; 704 705 skb_shinfo(skb)->gso_size = num_subframes * mss; 706 memcpy(cb, skb->cb, sizeof(cb)); 707 708 next = skb_gso_segment(skb, netdev_flags); 709 skb_shinfo(skb)->gso_size = mss; 710 if (WARN_ON_ONCE(IS_ERR(next))) 711 return -EINVAL; 712 else if (next) 713 consume_skb(skb); 714 715 while (next) { 716 tmp = next; 717 next = tmp->next; 718 719 memcpy(tmp->cb, cb, sizeof(tmp->cb)); 720 /* 721 * Compute the length of all the data added for the A-MSDU. 722 * This will be used to compute the length to write in the TX 723 * command. We have: SNAP + IP + TCP for n -1 subframes and 724 * ETH header for n subframes. 725 */ 726 tcp_payload_len = skb_tail_pointer(tmp) - 727 skb_transport_header(tmp) - 728 tcp_hdrlen(tmp) + tmp->data_len; 729 730 if (ipv4) 731 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); 732 733 if (tcp_payload_len > mss) { 734 skb_shinfo(tmp)->gso_size = mss; 735 } else { 736 if (ieee80211_is_data_qos(hdr->frame_control)) { 737 u8 *qc; 738 739 if (ipv4) 740 ip_send_check(ip_hdr(tmp)); 741 742 qc = ieee80211_get_qos_ctl((void *)tmp->data); 743 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; 744 } 745 skb_shinfo(tmp)->gso_size = 0; 746 } 747 748 tmp->prev = NULL; 749 tmp->next = NULL; 750 751 __skb_queue_tail(mpdus_skb, tmp); 752 i++; 753 } 754 755 return 0; 756 } 757 758 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 759 struct ieee80211_tx_info *info, 760 struct ieee80211_sta *sta, 761 struct sk_buff_head *mpdus_skb) 762 { 763 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 764 struct ieee80211_hdr *hdr = (void *)skb->data; 765 unsigned int mss = skb_shinfo(skb)->gso_size; 766 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; 767 u16 snap_ip_tcp, pad; 768 unsigned int dbg_max_amsdu_len; 769 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG; 770 u8 tid, txf; 771 772 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + 773 tcp_hdrlen(skb); 774 775 dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len); 776 777 if (!mvmsta->max_amsdu_len || 778 !ieee80211_is_data_qos(hdr->frame_control) || 779 (!mvmsta->amsdu_enabled && !dbg_max_amsdu_len)) 780 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 781 782 /* 783 * Do not build AMSDU for IPv6 with extension headers. 784 * ask stack to segment and checkum the generated MPDUs for us. 785 */ 786 if (skb->protocol == htons(ETH_P_IPV6) && 787 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != 788 IPPROTO_TCP) { 789 netdev_flags &= ~NETIF_F_CSUM_MASK; 790 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 791 } 792 793 tid = ieee80211_get_tid(hdr); 794 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 795 return -EINVAL; 796 797 /* 798 * No need to lock amsdu_in_ampdu_allowed since it can't be modified 799 * during an BA session. 800 */ 801 if (info->flags & IEEE80211_TX_CTL_AMPDU && 802 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) 803 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 804 805 if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) || 806 !(mvmsta->amsdu_enabled & BIT(tid))) 807 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb); 808 809 max_amsdu_len = mvmsta->max_amsdu_len; 810 811 /* the Tx FIFO to which this A-MSDU will be routed */ 812 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, tid_to_mac80211_ac[tid]); 813 814 /* 815 * Don't send an AMSDU that will be longer than the TXF. 816 * Add a security margin of 256 for the TX command + headers. 817 * We also want to have the start of the next packet inside the 818 * fifo to be able to send bursts. 819 */ 820 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 821 mvm->fwrt.smem_cfg.lmac[0].txfifo_size[txf] - 822 256); 823 824 if (unlikely(dbg_max_amsdu_len)) 825 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 826 dbg_max_amsdu_len); 827 828 /* 829 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not 830 * supported. This is a spec requirement (IEEE 802.11-2015 831 * section 8.7.3 NOTE 3). 832 */ 833 if (info->flags & IEEE80211_TX_CTL_AMPDU && 834 !sta->vht_cap.vht_supported) 835 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); 836 837 /* Sub frame header + SNAP + IP header + TCP header + MSS */ 838 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; 839 pad = (4 - subf_len) & 0x3; 840 841 /* 842 * If we have N subframes in the A-MSDU, then the A-MSDU's size is 843 * N * subf_len + (N - 1) * pad. 844 */ 845 num_subframes = (max_amsdu_len + pad) / (subf_len + pad); 846 847 if (sta->max_amsdu_subframes && 848 num_subframes > sta->max_amsdu_subframes) 849 num_subframes = sta->max_amsdu_subframes; 850 851 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 852 tcp_hdrlen(skb) + skb->data_len; 853 854 /* 855 * Make sure we have enough TBs for the A-MSDU: 856 * 2 for each subframe 857 * 1 more for each fragment 858 * 1 more for the potential data in the header 859 */ 860 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > 861 mvm->trans->max_skb_frags) 862 num_subframes = 1; 863 864 if (num_subframes > 1) 865 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; 866 867 /* This skb fits in one single A-MSDU */ 868 if (num_subframes * mss >= tcp_payload_len) { 869 __skb_queue_tail(mpdus_skb, skb); 870 return 0; 871 } 872 873 /* 874 * Trick the segmentation function to make it 875 * create SKBs that can fit into one A-MSDU. 876 */ 877 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, 878 mpdus_skb); 879 } 880 #else /* CONFIG_INET */ 881 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, 882 struct ieee80211_tx_info *info, 883 struct ieee80211_sta *sta, 884 struct sk_buff_head *mpdus_skb) 885 { 886 /* Impossible to get TSO with CONFIG_INET */ 887 WARN_ON(1); 888 889 return -1; 890 } 891 #endif 892 893 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, 894 struct iwl_mvm_sta *mvm_sta, u8 tid, 895 struct sk_buff *skb) 896 { 897 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 898 u8 mac_queue = info->hw_queue; 899 struct sk_buff_head *deferred_tx_frames; 900 901 lockdep_assert_held(&mvm_sta->lock); 902 903 mvm_sta->deferred_traffic_tid_map |= BIT(tid); 904 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); 905 906 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; 907 908 skb_queue_tail(deferred_tx_frames, skb); 909 910 /* 911 * The first deferred frame should've stopped the MAC queues, so we 912 * should never get a second deferred frame for the RA/TID. 913 * In case of GSO the first packet may have been split, so don't warn. 914 */ 915 if (skb_queue_len(deferred_tx_frames) == 1) { 916 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); 917 schedule_work(&mvm->add_stream_wk); 918 } 919 } 920 921 /* Check if there are any timed-out TIDs on a given shared TXQ */ 922 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) 923 { 924 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; 925 unsigned long now = jiffies; 926 int tid; 927 928 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 929 return false; 930 931 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { 932 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + 933 IWL_MVM_DQA_QUEUE_TIMEOUT, now)) 934 return true; 935 } 936 937 return false; 938 } 939 940 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm, 941 struct iwl_mvm_sta *mvmsta, 942 int airtime) 943 { 944 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 945 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac]; 946 947 if (mvm->tcm.paused) 948 return; 949 950 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 951 schedule_delayed_work(&mvm->tcm.work, 0); 952 953 mdata->tx.airtime += airtime; 954 } 955 956 static void iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm, 957 struct iwl_mvm_sta *mvmsta, int tid) 958 { 959 u32 ac = tid_to_mac80211_ac[tid]; 960 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 961 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac]; 962 963 mdata->tx.pkts[ac]++; 964 } 965 966 /* 967 * Sets the fields in the Tx cmd that are crypto related 968 */ 969 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, 970 struct ieee80211_tx_info *info, 971 struct ieee80211_sta *sta) 972 { 973 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 974 struct iwl_mvm_sta *mvmsta; 975 struct iwl_device_cmd *dev_cmd; 976 __le16 fc; 977 u16 seq_number = 0; 978 u8 tid = IWL_MAX_TID_COUNT; 979 u16 txq_id = info->hw_queue; 980 bool is_ampdu = false; 981 int hdrlen; 982 983 mvmsta = iwl_mvm_sta_from_mac80211(sta); 984 fc = hdr->frame_control; 985 hdrlen = ieee80211_hdrlen(fc); 986 987 if (WARN_ON_ONCE(!mvmsta)) 988 return -1; 989 990 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 991 return -1; 992 993 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, 994 sta, mvmsta->sta_id); 995 if (!dev_cmd) 996 goto drop; 997 998 /* 999 * we handle that entirely ourselves -- for uAPSD the firmware 1000 * will always send a notification, and for PS-Poll responses 1001 * we'll notify mac80211 when getting frame status 1002 */ 1003 info->flags &= ~IEEE80211_TX_STATUS_EOSP; 1004 1005 spin_lock(&mvmsta->lock); 1006 1007 /* nullfunc frames should go to the MGMT queue regardless of QOS, 1008 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default 1009 * assignment of MGMT TID 1010 */ 1011 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { 1012 tid = ieee80211_get_tid(hdr); 1013 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) 1014 goto drop_unlock_sta; 1015 1016 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; 1017 if (WARN_ON_ONCE(is_ampdu && 1018 mvmsta->tid_data[tid].state != IWL_AGG_ON)) 1019 goto drop_unlock_sta; 1020 1021 seq_number = mvmsta->tid_data[tid].seq_number; 1022 seq_number &= IEEE80211_SCTL_SEQ; 1023 1024 if (!iwl_mvm_has_new_tx_api(mvm)) { 1025 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; 1026 1027 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); 1028 hdr->seq_ctrl |= cpu_to_le16(seq_number); 1029 /* update the tx_cmd hdr as it was already copied */ 1030 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; 1031 } 1032 } 1033 1034 txq_id = mvmsta->tid_data[tid].txq_id; 1035 1036 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); 1037 1038 /* Check if TXQ needs to be allocated or re-activated */ 1039 if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE || 1040 !mvmsta->tid_data[tid].is_tid_active)) { 1041 /* If TXQ needs to be allocated... */ 1042 if (txq_id == IWL_MVM_INVALID_QUEUE) { 1043 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); 1044 1045 /* 1046 * The frame is now deferred, and the worker scheduled 1047 * will re-allocate it, so we can free it for now. 1048 */ 1049 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1050 spin_unlock(&mvmsta->lock); 1051 return 0; 1052 } 1053 1054 /* queue should always be active in new TX path */ 1055 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1056 1057 /* If we are here - TXQ exists and needs to be re-activated */ 1058 spin_lock(&mvm->queue_info_lock); 1059 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; 1060 mvmsta->tid_data[tid].is_tid_active = true; 1061 spin_unlock(&mvm->queue_info_lock); 1062 1063 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n", 1064 txq_id); 1065 } 1066 1067 if (!iwl_mvm_has_new_tx_api(mvm)) { 1068 /* Keep track of the time of the last frame for this RA/TID */ 1069 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; 1070 1071 /* 1072 * If we have timed-out TIDs - schedule the worker that will 1073 * reconfig the queues and update them 1074 * 1075 * Note that the mvm->queue_info_lock isn't being taken here in 1076 * order to not serialize the TX flow. This isn't dangerous 1077 * because scheduling mvm->add_stream_wk can't ruin the state, 1078 * and if we DON'T schedule it due to some race condition then 1079 * next TX we get here we will. 1080 */ 1081 if (unlikely(mvm->queue_info[txq_id].status == 1082 IWL_MVM_QUEUE_SHARED && 1083 iwl_mvm_txq_should_update(mvm, txq_id))) 1084 schedule_work(&mvm->add_stream_wk); 1085 } 1086 1087 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, 1088 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); 1089 1090 /* From now on, we cannot access info->control */ 1091 iwl_mvm_skb_prepare_status(skb, dev_cmd); 1092 1093 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) 1094 goto drop_unlock_sta; 1095 1096 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) 1097 mvmsta->tid_data[tid].seq_number = seq_number + 0x10; 1098 1099 spin_unlock(&mvmsta->lock); 1100 1101 iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid); 1102 1103 return 0; 1104 1105 drop_unlock_sta: 1106 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); 1107 spin_unlock(&mvmsta->lock); 1108 drop: 1109 return -1; 1110 } 1111 1112 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, 1113 struct ieee80211_sta *sta) 1114 { 1115 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1116 struct ieee80211_tx_info info; 1117 struct sk_buff_head mpdus_skbs; 1118 unsigned int payload_len; 1119 int ret; 1120 1121 if (WARN_ON_ONCE(!mvmsta)) 1122 return -1; 1123 1124 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 1125 return -1; 1126 1127 memcpy(&info, skb->cb, sizeof(info)); 1128 1129 if (!skb_is_gso(skb)) 1130 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1131 1132 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - 1133 tcp_hdrlen(skb) + skb->data_len; 1134 1135 if (payload_len <= skb_shinfo(skb)->gso_size) 1136 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1137 1138 __skb_queue_head_init(&mpdus_skbs); 1139 1140 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); 1141 if (ret) 1142 return ret; 1143 1144 if (WARN_ON(skb_queue_empty(&mpdus_skbs))) 1145 return ret; 1146 1147 while (!skb_queue_empty(&mpdus_skbs)) { 1148 skb = __skb_dequeue(&mpdus_skbs); 1149 1150 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); 1151 if (ret) { 1152 __skb_queue_purge(&mpdus_skbs); 1153 return ret; 1154 } 1155 } 1156 1157 return 0; 1158 } 1159 1160 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, 1161 struct ieee80211_sta *sta, u8 tid) 1162 { 1163 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 1164 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 1165 struct ieee80211_vif *vif = mvmsta->vif; 1166 u16 normalized_ssn; 1167 1168 lockdep_assert_held(&mvmsta->lock); 1169 1170 if ((tid_data->state == IWL_AGG_ON || 1171 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && 1172 iwl_mvm_tid_queued(mvm, tid_data) == 0) { 1173 /* 1174 * Now that this aggregation or DQA queue is empty tell 1175 * mac80211 so it knows we no longer have frames buffered for 1176 * the station on this TID (for the TIM bitmap calculation.) 1177 */ 1178 ieee80211_sta_set_buffered(sta, tid, false); 1179 } 1180 1181 /* 1182 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need 1183 * to align the wrap around of ssn so we compare relevant values. 1184 */ 1185 normalized_ssn = tid_data->ssn; 1186 if (mvm->trans->cfg->gen2) 1187 normalized_ssn &= 0xff; 1188 1189 if (normalized_ssn != tid_data->next_reclaimed) 1190 return; 1191 1192 switch (tid_data->state) { 1193 case IWL_EMPTYING_HW_QUEUE_ADDBA: 1194 IWL_DEBUG_TX_QUEUES(mvm, 1195 "Can continue addBA flow ssn = next_recl = %d\n", 1196 tid_data->next_reclaimed); 1197 tid_data->state = IWL_AGG_STARTING; 1198 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1199 break; 1200 1201 case IWL_EMPTYING_HW_QUEUE_DELBA: 1202 IWL_DEBUG_TX_QUEUES(mvm, 1203 "Can continue DELBA flow ssn = next_recl = %d\n", 1204 tid_data->next_reclaimed); 1205 tid_data->state = IWL_AGG_OFF; 1206 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1207 break; 1208 1209 default: 1210 break; 1211 } 1212 } 1213 1214 #ifdef CONFIG_IWLWIFI_DEBUG 1215 const char *iwl_mvm_get_tx_fail_reason(u32 status) 1216 { 1217 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x 1218 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x 1219 1220 switch (status & TX_STATUS_MSK) { 1221 case TX_STATUS_SUCCESS: 1222 return "SUCCESS"; 1223 TX_STATUS_POSTPONE(DELAY); 1224 TX_STATUS_POSTPONE(FEW_BYTES); 1225 TX_STATUS_POSTPONE(BT_PRIO); 1226 TX_STATUS_POSTPONE(QUIET_PERIOD); 1227 TX_STATUS_POSTPONE(CALC_TTAK); 1228 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); 1229 TX_STATUS_FAIL(SHORT_LIMIT); 1230 TX_STATUS_FAIL(LONG_LIMIT); 1231 TX_STATUS_FAIL(UNDERRUN); 1232 TX_STATUS_FAIL(DRAIN_FLOW); 1233 TX_STATUS_FAIL(RFKILL_FLUSH); 1234 TX_STATUS_FAIL(LIFE_EXPIRE); 1235 TX_STATUS_FAIL(DEST_PS); 1236 TX_STATUS_FAIL(HOST_ABORTED); 1237 TX_STATUS_FAIL(BT_RETRY); 1238 TX_STATUS_FAIL(STA_INVALID); 1239 TX_STATUS_FAIL(FRAG_DROPPED); 1240 TX_STATUS_FAIL(TID_DISABLE); 1241 TX_STATUS_FAIL(FIFO_FLUSHED); 1242 TX_STATUS_FAIL(SMALL_CF_POLL); 1243 TX_STATUS_FAIL(FW_DROP); 1244 TX_STATUS_FAIL(STA_COLOR_MISMATCH); 1245 } 1246 1247 return "UNKNOWN"; 1248 1249 #undef TX_STATUS_FAIL 1250 #undef TX_STATUS_POSTPONE 1251 } 1252 #endif /* CONFIG_IWLWIFI_DEBUG */ 1253 1254 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, 1255 enum nl80211_band band, 1256 struct ieee80211_tx_rate *r) 1257 { 1258 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 1259 r->flags |= IEEE80211_TX_RC_GREEN_FIELD; 1260 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 1261 case RATE_MCS_CHAN_WIDTH_20: 1262 break; 1263 case RATE_MCS_CHAN_WIDTH_40: 1264 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 1265 break; 1266 case RATE_MCS_CHAN_WIDTH_80: 1267 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 1268 break; 1269 case RATE_MCS_CHAN_WIDTH_160: 1270 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; 1271 break; 1272 } 1273 if (rate_n_flags & RATE_MCS_SGI_MSK) 1274 r->flags |= IEEE80211_TX_RC_SHORT_GI; 1275 if (rate_n_flags & RATE_MCS_HT_MSK) { 1276 r->flags |= IEEE80211_TX_RC_MCS; 1277 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 1278 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 1279 ieee80211_rate_set_vht( 1280 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, 1281 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 1282 RATE_VHT_MCS_NSS_POS) + 1); 1283 r->flags |= IEEE80211_TX_RC_VHT_MCS; 1284 } else { 1285 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 1286 band); 1287 } 1288 } 1289 1290 /** 1291 * translate ucode response to mac80211 tx status control values 1292 */ 1293 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, 1294 struct ieee80211_tx_info *info) 1295 { 1296 struct ieee80211_tx_rate *r = &info->status.rates[0]; 1297 1298 info->status.antenna = 1299 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); 1300 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); 1301 } 1302 1303 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, 1304 u32 status) 1305 { 1306 struct iwl_fw_dbg_trigger_tlv *trig; 1307 struct iwl_fw_dbg_trigger_tx_status *status_trig; 1308 int i; 1309 1310 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) 1311 return; 1312 1313 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); 1314 status_trig = (void *)trig->data; 1315 1316 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig)) 1317 return; 1318 1319 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { 1320 /* don't collect on status 0 */ 1321 if (!status_trig->statuses[i].status) 1322 break; 1323 1324 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) 1325 continue; 1326 1327 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 1328 "Tx status %d was received", 1329 status & TX_STATUS_MSK); 1330 break; 1331 } 1332 } 1333 1334 /** 1335 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD 1336 * @tx_resp: the Tx response from the fw (agg or non-agg) 1337 * 1338 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since 1339 * it can't know that everything will go well until the end of the AMPDU, it 1340 * can't know in advance the number of MPDUs that will be sent in the current 1341 * batch. This is why it writes the agg Tx response while it fetches the MPDUs. 1342 * Hence, it can't know in advance what the SSN of the SCD will be at the end 1343 * of the batch. This is why the SSN of the SCD is written at the end of the 1344 * whole struct at a variable offset. This function knows how to cope with the 1345 * variable offset and returns the SSN of the SCD. 1346 */ 1347 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, 1348 struct iwl_mvm_tx_resp *tx_resp) 1349 { 1350 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + 1351 tx_resp->frame_count) & 0xfff; 1352 } 1353 1354 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, 1355 struct iwl_rx_packet *pkt) 1356 { 1357 struct ieee80211_sta *sta; 1358 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1359 int txq_id = SEQ_TO_QUEUE(sequence); 1360 /* struct iwl_mvm_tx_resp_v3 is almost the same */ 1361 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1362 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1363 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1364 struct agg_tx_status *agg_status = 1365 iwl_mvm_get_agg_status(mvm, tx_resp); 1366 u32 status = le16_to_cpu(agg_status->status); 1367 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); 1368 struct iwl_mvm_sta *mvmsta; 1369 struct sk_buff_head skbs; 1370 u8 skb_freed = 0; 1371 u8 lq_color; 1372 u16 next_reclaimed, seq_ctl; 1373 bool is_ndp = false; 1374 1375 __skb_queue_head_init(&skbs); 1376 1377 if (iwl_mvm_has_new_tx_api(mvm)) 1378 txq_id = le16_to_cpu(tx_resp->tx_queue); 1379 1380 seq_ctl = le16_to_cpu(tx_resp->seq_ctl); 1381 1382 /* we can free until ssn % q.n_bd not inclusive */ 1383 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); 1384 1385 while (!skb_queue_empty(&skbs)) { 1386 struct sk_buff *skb = __skb_dequeue(&skbs); 1387 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1388 bool flushed = false; 1389 1390 skb_freed++; 1391 1392 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1393 1394 memset(&info->status, 0, sizeof(info->status)); 1395 1396 /* inform mac80211 about what happened with the frame */ 1397 switch (status & TX_STATUS_MSK) { 1398 case TX_STATUS_SUCCESS: 1399 case TX_STATUS_DIRECT_DONE: 1400 info->flags |= IEEE80211_TX_STAT_ACK; 1401 break; 1402 case TX_STATUS_FAIL_FIFO_FLUSHED: 1403 case TX_STATUS_FAIL_DRAIN_FLOW: 1404 flushed = true; 1405 break; 1406 case TX_STATUS_FAIL_DEST_PS: 1407 /* the FW should have stopped the queue and not 1408 * return this status 1409 */ 1410 WARN_ON(1); 1411 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1412 break; 1413 default: 1414 break; 1415 } 1416 1417 iwl_mvm_tx_status_check_trigger(mvm, status); 1418 1419 info->status.rates[0].count = tx_resp->failure_frame + 1; 1420 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), 1421 info); 1422 info->status.status_driver_data[1] = 1423 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); 1424 1425 /* Single frame failure in an AMPDU queue => send BAR */ 1426 if (info->flags & IEEE80211_TX_CTL_AMPDU && 1427 !(info->flags & IEEE80211_TX_STAT_ACK) && 1428 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed) 1429 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; 1430 info->flags &= ~IEEE80211_TX_CTL_AMPDU; 1431 1432 /* W/A FW bug: seq_ctl is wrong when the status isn't success */ 1433 if (status != TX_STATUS_SUCCESS) { 1434 struct ieee80211_hdr *hdr = (void *)skb->data; 1435 seq_ctl = le16_to_cpu(hdr->seq_ctrl); 1436 } 1437 1438 if (unlikely(!seq_ctl)) { 1439 struct ieee80211_hdr *hdr = (void *)skb->data; 1440 1441 /* 1442 * If it is an NDP, we can't update next_reclaim since 1443 * its sequence control is 0. Note that for that same 1444 * reason, NDPs are never sent to A-MPDU'able queues 1445 * so that we can never have more than one freed frame 1446 * for a single Tx resonse (see WARN_ON below). 1447 */ 1448 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 1449 is_ndp = true; 1450 } 1451 1452 /* 1453 * TODO: this is not accurate if we are freeing more than one 1454 * packet. 1455 */ 1456 info->status.tx_time = 1457 le16_to_cpu(tx_resp->wireless_media_time); 1458 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); 1459 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1460 info->status.status_driver_data[0] = 1461 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); 1462 1463 ieee80211_tx_status(mvm->hw, skb); 1464 } 1465 1466 /* This is an aggregation queue or might become one, so we use 1467 * the ssn since: ssn = wifi seq_num % 256. 1468 * The seq_ctl is the sequence control of the packet to which 1469 * this Tx response relates. But if there is a hole in the 1470 * bitmap of the BA we received, this Tx response may allow to 1471 * reclaim the hole and all the subsequent packets that were 1472 * already acked. In that case, seq_ctl != ssn, and the next 1473 * packet to be reclaimed will be ssn and not seq_ctl. In that 1474 * case, several packets will be reclaimed even if 1475 * frame_count = 1. 1476 * 1477 * The ssn is the index (% 256) of the latest packet that has 1478 * treated (acked / dropped) + 1. 1479 */ 1480 next_reclaimed = ssn; 1481 1482 IWL_DEBUG_TX_REPLY(mvm, 1483 "TXQ %d status %s (0x%08x)\n", 1484 txq_id, iwl_mvm_get_tx_fail_reason(status), status); 1485 1486 IWL_DEBUG_TX_REPLY(mvm, 1487 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", 1488 le32_to_cpu(tx_resp->initial_rate), 1489 tx_resp->failure_frame, SEQ_TO_INDEX(sequence), 1490 ssn, next_reclaimed, seq_ctl); 1491 1492 rcu_read_lock(); 1493 1494 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1495 /* 1496 * sta can't be NULL otherwise it'd mean that the sta has been freed in 1497 * the firmware while we still have packets for it in the Tx queues. 1498 */ 1499 if (WARN_ON_ONCE(!sta)) 1500 goto out; 1501 1502 if (!IS_ERR(sta)) { 1503 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1504 1505 iwl_mvm_tx_airtime(mvm, mvmsta, 1506 le16_to_cpu(tx_resp->wireless_media_time)); 1507 1508 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) { 1509 struct iwl_mvm_tid_data *tid_data = 1510 &mvmsta->tid_data[tid]; 1511 bool send_eosp_ndp = false; 1512 1513 spin_lock_bh(&mvmsta->lock); 1514 1515 if (!is_ndp) { 1516 tid_data->next_reclaimed = next_reclaimed; 1517 IWL_DEBUG_TX_REPLY(mvm, 1518 "Next reclaimed packet:%d\n", 1519 next_reclaimed); 1520 } else { 1521 IWL_DEBUG_TX_REPLY(mvm, 1522 "NDP - don't update next_reclaimed\n"); 1523 } 1524 1525 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1526 1527 if (mvmsta->sleep_tx_count) { 1528 mvmsta->sleep_tx_count--; 1529 if (mvmsta->sleep_tx_count && 1530 !iwl_mvm_tid_queued(mvm, tid_data)) { 1531 /* 1532 * The number of frames in the queue 1533 * dropped to 0 even if we sent less 1534 * frames than we thought we had on the 1535 * Tx queue. 1536 * This means we had holes in the BA 1537 * window that we just filled, ask 1538 * mac80211 to send EOSP since the 1539 * firmware won't know how to do that. 1540 * Send NDP and the firmware will send 1541 * EOSP notification that will trigger 1542 * a call to ieee80211_sta_eosp(). 1543 */ 1544 send_eosp_ndp = true; 1545 } 1546 } 1547 1548 spin_unlock_bh(&mvmsta->lock); 1549 if (send_eosp_ndp) { 1550 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, 1551 IEEE80211_FRAME_RELEASE_UAPSD, 1552 1, tid, false, false); 1553 mvmsta->sleep_tx_count = 0; 1554 ieee80211_send_eosp_nullfunc(sta, tid); 1555 } 1556 } 1557 1558 if (mvmsta->next_status_eosp) { 1559 mvmsta->next_status_eosp = false; 1560 ieee80211_sta_eosp(sta); 1561 } 1562 } else { 1563 mvmsta = NULL; 1564 } 1565 1566 out: 1567 rcu_read_unlock(); 1568 } 1569 1570 #ifdef CONFIG_IWLWIFI_DEBUG 1571 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x 1572 static const char *iwl_get_agg_tx_status(u16 status) 1573 { 1574 switch (status & AGG_TX_STATE_STATUS_MSK) { 1575 AGG_TX_STATE_(TRANSMITTED); 1576 AGG_TX_STATE_(UNDERRUN); 1577 AGG_TX_STATE_(BT_PRIO); 1578 AGG_TX_STATE_(FEW_BYTES); 1579 AGG_TX_STATE_(ABORT); 1580 AGG_TX_STATE_(TX_ON_AIR_DROP); 1581 AGG_TX_STATE_(LAST_SENT_TRY_CNT); 1582 AGG_TX_STATE_(LAST_SENT_BT_KILL); 1583 AGG_TX_STATE_(SCD_QUERY); 1584 AGG_TX_STATE_(TEST_BAD_CRC32); 1585 AGG_TX_STATE_(RESPONSE); 1586 AGG_TX_STATE_(DUMP_TX); 1587 AGG_TX_STATE_(DELAY_TX); 1588 } 1589 1590 return "UNKNOWN"; 1591 } 1592 1593 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1594 struct iwl_rx_packet *pkt) 1595 { 1596 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1597 struct agg_tx_status *frame_status = 1598 iwl_mvm_get_agg_status(mvm, tx_resp); 1599 int i; 1600 1601 for (i = 0; i < tx_resp->frame_count; i++) { 1602 u16 fstatus = le16_to_cpu(frame_status[i].status); 1603 1604 IWL_DEBUG_TX_REPLY(mvm, 1605 "status %s (0x%04x), try-count (%d) seq (0x%x)\n", 1606 iwl_get_agg_tx_status(fstatus), 1607 fstatus & AGG_TX_STATE_STATUS_MSK, 1608 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> 1609 AGG_TX_STATE_TRY_CNT_POS, 1610 le16_to_cpu(frame_status[i].sequence)); 1611 } 1612 } 1613 #else 1614 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, 1615 struct iwl_rx_packet *pkt) 1616 {} 1617 #endif /* CONFIG_IWLWIFI_DEBUG */ 1618 1619 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, 1620 struct iwl_rx_packet *pkt) 1621 { 1622 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1623 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); 1624 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); 1625 u16 sequence = le16_to_cpu(pkt->hdr.sequence); 1626 struct iwl_mvm_sta *mvmsta; 1627 int queue = SEQ_TO_QUEUE(sequence); 1628 1629 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE && 1630 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) 1631 return; 1632 1633 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) 1634 return; 1635 1636 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); 1637 1638 rcu_read_lock(); 1639 1640 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1641 1642 if (!WARN_ON_ONCE(!mvmsta)) { 1643 mvmsta->tid_data[tid].rate_n_flags = 1644 le32_to_cpu(tx_resp->initial_rate); 1645 mvmsta->tid_data[tid].tx_time = 1646 le16_to_cpu(tx_resp->wireless_media_time); 1647 mvmsta->tid_data[tid].lq_color = 1648 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); 1649 iwl_mvm_tx_airtime(mvm, mvmsta, 1650 le16_to_cpu(tx_resp->wireless_media_time)); 1651 } 1652 1653 rcu_read_unlock(); 1654 } 1655 1656 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1657 { 1658 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1659 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; 1660 1661 if (tx_resp->frame_count == 1) 1662 iwl_mvm_rx_tx_cmd_single(mvm, pkt); 1663 else 1664 iwl_mvm_rx_tx_cmd_agg(mvm, pkt); 1665 } 1666 1667 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, 1668 int txq, int index, 1669 struct ieee80211_tx_info *ba_info, u32 rate) 1670 { 1671 struct sk_buff_head reclaimed_skbs; 1672 struct iwl_mvm_tid_data *tid_data; 1673 struct ieee80211_sta *sta; 1674 struct iwl_mvm_sta *mvmsta; 1675 struct sk_buff *skb; 1676 int freed; 1677 1678 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || 1679 tid > IWL_MAX_TID_COUNT, 1680 "sta_id %d tid %d", sta_id, tid)) 1681 return; 1682 1683 rcu_read_lock(); 1684 1685 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1686 1687 /* Reclaiming frames for a station that has been deleted ? */ 1688 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { 1689 rcu_read_unlock(); 1690 return; 1691 } 1692 1693 mvmsta = iwl_mvm_sta_from_mac80211(sta); 1694 tid_data = &mvmsta->tid_data[tid]; 1695 1696 if (tid_data->txq_id != txq) { 1697 IWL_ERR(mvm, 1698 "invalid BA notification: Q %d, tid %d\n", 1699 tid_data->txq_id, tid); 1700 rcu_read_unlock(); 1701 return; 1702 } 1703 1704 spin_lock_bh(&mvmsta->lock); 1705 1706 __skb_queue_head_init(&reclaimed_skbs); 1707 1708 /* 1709 * Release all TFDs before the SSN, i.e. all TFDs in front of 1710 * block-ack window (we assume that they've been successfully 1711 * transmitted ... if not, it's too late anyway). 1712 */ 1713 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); 1714 1715 tid_data->next_reclaimed = index; 1716 1717 iwl_mvm_check_ratid_empty(mvm, sta, tid); 1718 1719 freed = 0; 1720 1721 /* pack lq color from tid_data along the reduced txp */ 1722 ba_info->status.status_driver_data[0] = 1723 RS_DRV_DATA_PACK(tid_data->lq_color, 1724 ba_info->status.status_driver_data[0]); 1725 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; 1726 1727 skb_queue_walk(&reclaimed_skbs, skb) { 1728 struct ieee80211_hdr *hdr = (void *)skb->data; 1729 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1730 1731 if (ieee80211_is_data_qos(hdr->frame_control)) 1732 freed++; 1733 else 1734 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT); 1735 1736 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); 1737 1738 memset(&info->status, 0, sizeof(info->status)); 1739 /* Packet was transmitted successfully, failures come as single 1740 * frames because before failing a frame the firmware transmits 1741 * it without aggregation at least once. 1742 */ 1743 info->flags |= IEEE80211_TX_STAT_ACK; 1744 1745 /* this is the first skb we deliver in this batch */ 1746 /* put the rate scaling data there */ 1747 if (freed == 1) { 1748 info->flags |= IEEE80211_TX_STAT_AMPDU; 1749 memcpy(&info->status, &ba_info->status, 1750 sizeof(ba_info->status)); 1751 iwl_mvm_hwrate_to_tx_status(rate, info); 1752 } 1753 } 1754 1755 spin_unlock_bh(&mvmsta->lock); 1756 1757 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is 1758 * possible (i.e. first MPDU in the aggregation wasn't acked) 1759 * Still it's important to update RS about sent vs. acked. 1760 */ 1761 if (skb_queue_empty(&reclaimed_skbs)) { 1762 struct ieee80211_chanctx_conf *chanctx_conf = NULL; 1763 1764 if (mvmsta->vif) 1765 chanctx_conf = 1766 rcu_dereference(mvmsta->vif->chanctx_conf); 1767 1768 if (WARN_ON_ONCE(!chanctx_conf)) 1769 goto out; 1770 1771 ba_info->band = chanctx_conf->def.chan->band; 1772 iwl_mvm_hwrate_to_tx_status(rate, ba_info); 1773 1774 if (!iwl_mvm_has_tlc_offload(mvm)) { 1775 IWL_DEBUG_TX_REPLY(mvm, 1776 "No reclaim. Update rs directly\n"); 1777 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); 1778 } 1779 } 1780 1781 out: 1782 rcu_read_unlock(); 1783 1784 while (!skb_queue_empty(&reclaimed_skbs)) { 1785 skb = __skb_dequeue(&reclaimed_skbs); 1786 ieee80211_tx_status(mvm->hw, skb); 1787 } 1788 } 1789 1790 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1791 { 1792 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1793 int sta_id, tid, txq, index; 1794 struct ieee80211_tx_info ba_info = {}; 1795 struct iwl_mvm_ba_notif *ba_notif; 1796 struct iwl_mvm_tid_data *tid_data; 1797 struct iwl_mvm_sta *mvmsta; 1798 1799 ba_info.flags = IEEE80211_TX_STAT_AMPDU; 1800 1801 if (iwl_mvm_has_new_tx_api(mvm)) { 1802 struct iwl_mvm_compressed_ba_notif *ba_res = 1803 (void *)pkt->data; 1804 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info); 1805 int i; 1806 1807 sta_id = ba_res->sta_id; 1808 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); 1809 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); 1810 ba_info.status.tx_time = 1811 (u16)le32_to_cpu(ba_res->wireless_time); 1812 ba_info.status.status_driver_data[0] = 1813 (void *)(uintptr_t)ba_res->reduced_txp; 1814 1815 if (!le16_to_cpu(ba_res->tfd_cnt)) 1816 goto out; 1817 1818 rcu_read_lock(); 1819 1820 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1821 if (!mvmsta) 1822 goto out_unlock; 1823 1824 /* Free per TID */ 1825 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { 1826 struct iwl_mvm_compressed_ba_tfd *ba_tfd = 1827 &ba_res->tfd[i]; 1828 1829 tid = ba_tfd->tid; 1830 if (tid == IWL_MGMT_TID) 1831 tid = IWL_MAX_TID_COUNT; 1832 1833 mvmsta->tid_data[i].lq_color = lq_color; 1834 iwl_mvm_tx_reclaim(mvm, sta_id, tid, 1835 (int)(le16_to_cpu(ba_tfd->q_num)), 1836 le16_to_cpu(ba_tfd->tfd_index), 1837 &ba_info, 1838 le32_to_cpu(ba_res->tx_rate)); 1839 } 1840 1841 iwl_mvm_tx_airtime(mvm, mvmsta, 1842 le32_to_cpu(ba_res->wireless_time)); 1843 out_unlock: 1844 rcu_read_unlock(); 1845 out: 1846 IWL_DEBUG_TX_REPLY(mvm, 1847 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", 1848 sta_id, le32_to_cpu(ba_res->flags), 1849 le16_to_cpu(ba_res->txed), 1850 le16_to_cpu(ba_res->done)); 1851 return; 1852 } 1853 1854 ba_notif = (void *)pkt->data; 1855 sta_id = ba_notif->sta_id; 1856 tid = ba_notif->tid; 1857 /* "flow" corresponds to Tx queue */ 1858 txq = le16_to_cpu(ba_notif->scd_flow); 1859 /* "ssn" is start of block-ack Tx window, corresponds to index 1860 * (in Tx queue's circular buffer) of first TFD/frame in window */ 1861 index = le16_to_cpu(ba_notif->scd_ssn); 1862 1863 rcu_read_lock(); 1864 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); 1865 if (WARN_ON_ONCE(!mvmsta)) { 1866 rcu_read_unlock(); 1867 return; 1868 } 1869 1870 tid_data = &mvmsta->tid_data[tid]; 1871 1872 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; 1873 ba_info.status.ampdu_len = ba_notif->txed; 1874 ba_info.status.tx_time = tid_data->tx_time; 1875 ba_info.status.status_driver_data[0] = 1876 (void *)(uintptr_t)ba_notif->reduced_txp; 1877 1878 rcu_read_unlock(); 1879 1880 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, 1881 tid_data->rate_n_flags); 1882 1883 IWL_DEBUG_TX_REPLY(mvm, 1884 "BA_NOTIFICATION Received from %pM, sta_id = %d\n", 1885 ba_notif->sta_addr, ba_notif->sta_id); 1886 1887 IWL_DEBUG_TX_REPLY(mvm, 1888 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", 1889 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), 1890 le64_to_cpu(ba_notif->bitmap), txq, index, 1891 ba_notif->txed, ba_notif->txed_2_done); 1892 1893 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", 1894 ba_notif->reduced_txp); 1895 } 1896 1897 /* 1898 * Note that there are transports that buffer frames before they reach 1899 * the firmware. This means that after flush_tx_path is called, the 1900 * queue might not be empty. The race-free way to handle this is to: 1901 * 1) set the station as draining 1902 * 2) flush the Tx path 1903 * 3) wait for the transport queues to be empty 1904 */ 1905 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) 1906 { 1907 int ret; 1908 struct iwl_tx_path_flush_cmd_v1 flush_cmd = { 1909 .queues_ctl = cpu_to_le32(tfd_msk), 1910 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), 1911 }; 1912 1913 WARN_ON(iwl_mvm_has_new_tx_api(mvm)); 1914 1915 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1916 sizeof(flush_cmd), &flush_cmd); 1917 if (ret) 1918 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1919 return ret; 1920 } 1921 1922 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, 1923 u16 tids, u32 flags) 1924 { 1925 int ret; 1926 struct iwl_tx_path_flush_cmd flush_cmd = { 1927 .sta_id = cpu_to_le32(sta_id), 1928 .tid_mask = cpu_to_le16(tids), 1929 }; 1930 1931 WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); 1932 1933 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, 1934 sizeof(flush_cmd), &flush_cmd); 1935 if (ret) 1936 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); 1937 return ret; 1938 } 1939 1940 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags) 1941 { 1942 struct iwl_mvm_int_sta *int_sta = sta; 1943 struct iwl_mvm_sta *mvm_sta = sta; 1944 1945 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != 1946 offsetof(struct iwl_mvm_sta, sta_id)); 1947 1948 if (iwl_mvm_has_new_tx_api(mvm)) 1949 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 1950 0xff | BIT(IWL_MGMT_TID), flags); 1951 1952 if (internal) 1953 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, 1954 flags); 1955 1956 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags); 1957 } 1958