1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2002-2005, Instant802 Networks, Inc. 4 * Copyright 2005-2006, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net> 7 * Copyright 2013-2014 Intel Mobile Communications GmbH 8 * Copyright 2021-2026 Intel Corporation 9 */ 10 11 #include <linux/export.h> 12 #include <linux/etherdevice.h> 13 #include <net/mac80211.h> 14 #include <linux/unaligned.h> 15 #include "ieee80211_i.h" 16 #include "rate.h" 17 #include "mesh.h" 18 #include "led.h" 19 #include "wme.h" 20 21 22 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 23 struct sk_buff *skb) 24 { 25 struct ieee80211_local *local = hw_to_local(hw); 26 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 27 int tmp; 28 29 skb->pkt_type = IEEE80211_TX_STATUS_MSG; 30 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? 31 &local->skb_queue : &local->skb_queue_unreliable, skb); 32 tmp = skb_queue_len(&local->skb_queue) + 33 skb_queue_len(&local->skb_queue_unreliable); 34 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && 35 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 36 ieee80211_free_txskb(hw, skb); 37 tmp--; 38 I802_DEBUG_INC(local->tx_status_drop); 39 } 40 tasklet_schedule(&local->tasklet); 41 } 42 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); 43 44 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, 45 struct sta_info *sta, 46 struct sk_buff *skb) 47 { 48 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 49 struct ieee80211_hdr *hdr = (void *)skb->data; 50 int ac; 51 52 if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER | 53 IEEE80211_TX_CTL_AMPDU | 54 IEEE80211_TX_CTL_HW_80211_ENCAP)) { 55 ieee80211_free_txskb(&local->hw, skb); 56 return; 57 } 58 59 /* 60 * This skb 'survived' a round-trip through the driver, and 61 * hopefully the driver didn't mangle it too badly. However, 62 * we can definitely not rely on the control information 63 * being correct. Clear it so we don't get junk there, and 64 * indicate that it needs new processing, but must not be 65 * modified/encrypted again. 66 */ 67 memset(&info->control, 0, sizeof(info->control)); 68 69 info->control.jiffies = jiffies; 70 info->control.vif = &sta->sdata->vif; 71 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING; 72 info->flags |= IEEE80211_TX_INTFL_RETRANSMISSION; 73 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; 74 75 sta->deflink.status_stats.filtered++; 76 77 /* 78 * Clear more-data bit on filtered frames, it might be set 79 * but later frames might time out so it might have to be 80 * clear again ... It's all rather unlikely (this frame 81 * should time out first, right?) but let's not confuse 82 * peers unnecessarily. 83 */ 84 if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) 85 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); 86 87 if (ieee80211_is_data_qos(hdr->frame_control)) { 88 u8 *p = ieee80211_get_qos_ctl(hdr); 89 int tid = *p & IEEE80211_QOS_CTL_TID_MASK; 90 91 /* 92 * Clear EOSP if set, this could happen e.g. 93 * if an absence period (us being a P2P GO) 94 * shortens the SP. 95 */ 96 if (*p & IEEE80211_QOS_CTL_EOSP) 97 *p &= ~IEEE80211_QOS_CTL_EOSP; 98 ac = ieee80211_ac_from_tid(tid); 99 } else { 100 ac = IEEE80211_AC_BE; 101 } 102 103 /* 104 * Clear the TX filter mask for this STA when sending the next 105 * packet. If the STA went to power save mode, this will happen 106 * when it wakes up for the next time. 107 */ 108 set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT); 109 ieee80211_clear_fast_xmit(sta); 110 111 /* 112 * This code races in the following way: 113 * 114 * (1) STA sends frame indicating it will go to sleep and does so 115 * (2) hardware/firmware adds STA to filter list, passes frame up 116 * (3) hardware/firmware processes TX fifo and suppresses a frame 117 * (4) we get TX status before having processed the frame and 118 * knowing that the STA has gone to sleep. 119 * 120 * This is actually quite unlikely even when both those events are 121 * processed from interrupts coming in quickly after one another or 122 * even at the same time because we queue both TX status events and 123 * RX frames to be processed by a tasklet and process them in the 124 * same order that they were received or TX status last. Hence, there 125 * is no race as long as the frame RX is processed before the next TX 126 * status, which drivers can ensure, see below. 127 * 128 * Note that this can only happen if the hardware or firmware can 129 * actually add STAs to the filter list, if this is done by the 130 * driver in response to set_tim() (which will only reduce the race 131 * this whole filtering tries to solve, not completely solve it) 132 * this situation cannot happen. 133 * 134 * To completely solve this race drivers need to make sure that they 135 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing 136 * functions and 137 * (b) always process RX events before TX status events if ordering 138 * can be unknown, for example with different interrupt status 139 * bits. 140 * (c) if PS mode transitions are manual (i.e. the flag 141 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state 142 * changes before calling TX status events if ordering can be 143 * unknown. 144 */ 145 if (test_sta_flag(sta, WLAN_STA_PS_STA) && 146 skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { 147 skb_queue_tail(&sta->tx_filtered[ac], skb); 148 sta_info_recalc_tim(sta); 149 150 if (!timer_pending(&local->sta_cleanup)) 151 mod_timer(&local->sta_cleanup, 152 round_jiffies(jiffies + 153 STA_INFO_CLEANUP_INTERVAL)); 154 return; 155 } 156 157 if (!test_sta_flag(sta, WLAN_STA_PS_STA) && 158 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { 159 /* Software retry the packet once */ 160 info->flags |= IEEE80211_TX_INTFL_RETRIED; 161 ieee80211_add_pending_skb(local, skb); 162 return; 163 } 164 165 ps_dbg_ratelimited(sta->sdata, 166 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", 167 skb_queue_len(&sta->tx_filtered[ac]), 168 !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); 169 ieee80211_free_txskb(&local->hw, skb); 170 } 171 172 static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) 173 { 174 struct tid_ampdu_tx *tid_tx; 175 176 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 177 if (!tid_tx || !tid_tx->bar_pending) 178 return; 179 180 tid_tx->bar_pending = false; 181 ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn); 182 } 183 184 static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) 185 { 186 struct ieee80211_mgmt *mgmt = (void *) skb->data; 187 188 if (ieee80211_is_data_qos(mgmt->frame_control)) { 189 struct ieee80211_hdr *hdr = (void *) skb->data; 190 u8 *qc = ieee80211_get_qos_ctl(hdr); 191 u16 tid = qc[0] & 0xf; 192 193 ieee80211_check_pending_bar(sta, hdr->addr1, tid); 194 } 195 } 196 197 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) 198 { 199 struct tid_ampdu_tx *tid_tx; 200 201 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 202 if (!tid_tx) 203 return; 204 205 tid_tx->failed_bar_ssn = ssn; 206 tid_tx->bar_pending = true; 207 } 208 209 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info, 210 struct ieee80211_tx_status *status) 211 { 212 struct ieee80211_rate_status *status_rate = NULL; 213 int len = sizeof(struct ieee80211_radiotap_header); 214 215 if (status && status->n_rates) 216 status_rate = &status->rates[status->n_rates - 1]; 217 218 /* IEEE80211_RADIOTAP_RATE rate */ 219 if (status_rate && !(status_rate->rate_idx.flags & 220 (RATE_INFO_FLAGS_MCS | 221 RATE_INFO_FLAGS_DMG | 222 RATE_INFO_FLAGS_EDMG | 223 RATE_INFO_FLAGS_VHT_MCS | 224 RATE_INFO_FLAGS_HE_MCS))) 225 len += 2; 226 else if (info->status.rates[0].idx >= 0 && 227 !(info->status.rates[0].flags & 228 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))) 229 len += 2; 230 231 /* IEEE80211_RADIOTAP_TX_FLAGS */ 232 len += 2; 233 234 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 235 len += 1; 236 237 /* IEEE80211_RADIOTAP_MCS 238 * IEEE80211_RADIOTAP_VHT */ 239 if (status_rate) { 240 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS) 241 len += 3; 242 else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_VHT_MCS) 243 len = ALIGN(len, 2) + 12; 244 else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_HE_MCS) 245 len = ALIGN(len, 2) + 12; 246 } else if (info->status.rates[0].idx >= 0) { 247 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) 248 len += 3; 249 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) 250 len = ALIGN(len, 2) + 12; 251 } 252 253 return len; 254 } 255 256 static void 257 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, 258 struct sk_buff *skb, int retry_count, 259 int rtap_len, 260 struct ieee80211_tx_status *status) 261 { 262 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 263 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 264 struct ieee80211_radiotap_header *rthdr; 265 struct ieee80211_rate_status *status_rate = NULL; 266 unsigned char *pos; 267 u16 legacy_rate = 0; 268 u16 txflags; 269 270 if (status && status->n_rates) 271 status_rate = &status->rates[status->n_rates - 1]; 272 273 rthdr = skb_push(skb, rtap_len); 274 275 memset(rthdr, 0, rtap_len); 276 rthdr->it_len = cpu_to_le16(rtap_len); 277 rthdr->it_present = 278 cpu_to_le32(BIT(IEEE80211_RADIOTAP_TX_FLAGS) | 279 BIT(IEEE80211_RADIOTAP_DATA_RETRIES)); 280 pos = (unsigned char *)(rthdr + 1); 281 282 /* 283 * XXX: Once radiotap gets the bitmap reset thing the vendor 284 * extensions proposal contains, we can actually report 285 * the whole set of tries we did. 286 */ 287 288 /* IEEE80211_RADIOTAP_RATE */ 289 290 if (status_rate) { 291 if (!(status_rate->rate_idx.flags & 292 (RATE_INFO_FLAGS_MCS | 293 RATE_INFO_FLAGS_DMG | 294 RATE_INFO_FLAGS_EDMG | 295 RATE_INFO_FLAGS_VHT_MCS | 296 RATE_INFO_FLAGS_HE_MCS))) 297 legacy_rate = status_rate->rate_idx.legacy; 298 } else if (info->band < NUM_NL80211_BANDS && 299 info->status.rates[0].idx >= 0 && 300 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | 301 IEEE80211_TX_RC_VHT_MCS))) { 302 struct ieee80211_supported_band *sband; 303 304 sband = local->hw.wiphy->bands[info->band]; 305 legacy_rate = 306 sband->bitrates[info->status.rates[0].idx].bitrate; 307 } 308 309 if (legacy_rate) { 310 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE)); 311 *pos = DIV_ROUND_UP(legacy_rate, 5); 312 /* padding for tx flags */ 313 pos += 2; 314 } 315 316 /* IEEE80211_RADIOTAP_TX_FLAGS */ 317 txflags = 0; 318 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 319 !is_multicast_ether_addr(hdr->addr1)) 320 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; 321 322 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 323 txflags |= IEEE80211_RADIOTAP_F_TX_CTS; 324 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) 325 txflags |= IEEE80211_RADIOTAP_F_TX_RTS; 326 327 put_unaligned_le16(txflags, pos); 328 pos += 2; 329 330 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 331 /* for now report the total retry_count */ 332 *pos = retry_count; 333 pos++; 334 335 if (status_rate && (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS)) 336 { 337 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); 338 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 339 IEEE80211_RADIOTAP_MCS_HAVE_GI | 340 IEEE80211_RADIOTAP_MCS_HAVE_BW; 341 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI) 342 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 343 if (status_rate->rate_idx.bw == RATE_INFO_BW_40) 344 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 345 pos[2] = status_rate->rate_idx.mcs; 346 pos += 3; 347 } else if (status_rate && (status_rate->rate_idx.flags & 348 RATE_INFO_FLAGS_VHT_MCS)) 349 { 350 u16 known = local->hw.radiotap_vht_details & 351 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 352 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 353 354 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); 355 356 /* required alignment from rthdr */ 357 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 358 359 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 360 put_unaligned_le16(known, pos); 361 pos += 2; 362 363 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 364 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI) 365 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 366 pos++; 367 368 /* u8 bandwidth */ 369 switch (status_rate->rate_idx.bw) { 370 case RATE_INFO_BW_160: 371 *pos = 11; 372 break; 373 case RATE_INFO_BW_80: 374 *pos = 4; 375 break; 376 case RATE_INFO_BW_40: 377 *pos = 1; 378 break; 379 default: 380 *pos = 0; 381 break; 382 } 383 pos++; 384 385 /* u8 mcs_nss[4] */ 386 *pos = (status_rate->rate_idx.mcs << 4) | 387 status_rate->rate_idx.nss; 388 pos += 4; 389 390 /* u8 coding */ 391 pos++; 392 /* u8 group_id */ 393 pos++; 394 /* u16 partial_aid */ 395 pos += 2; 396 } else if (status_rate && (status_rate->rate_idx.flags & 397 RATE_INFO_FLAGS_HE_MCS)) 398 { 399 struct ieee80211_radiotap_he *he; 400 401 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE)); 402 403 /* required alignment from rthdr */ 404 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 405 he = (struct ieee80211_radiotap_he *)pos; 406 407 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU | 408 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 409 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 410 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 411 412 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN); 413 414 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f) 415 416 he->data6 |= HE_PREP(DATA6_NSTS, status_rate->rate_idx.nss); 417 418 #define CHECK_GI(s) \ 419 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \ 420 (int)NL80211_RATE_INFO_HE_GI_##s) 421 422 CHECK_GI(0_8); 423 CHECK_GI(1_6); 424 CHECK_GI(3_2); 425 426 he->data3 |= HE_PREP(DATA3_DATA_MCS, status_rate->rate_idx.mcs); 427 he->data3 |= HE_PREP(DATA3_DATA_DCM, status_rate->rate_idx.he_dcm); 428 429 he->data5 |= HE_PREP(DATA5_GI, status_rate->rate_idx.he_gi); 430 431 switch (status_rate->rate_idx.bw) { 432 case RATE_INFO_BW_20: 433 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 434 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ); 435 break; 436 case RATE_INFO_BW_40: 437 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 438 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ); 439 break; 440 case RATE_INFO_BW_80: 441 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 442 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ); 443 break; 444 case RATE_INFO_BW_160: 445 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 446 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ); 447 break; 448 case RATE_INFO_BW_HE_RU: 449 #define CHECK_RU_ALLOC(s) \ 450 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \ 451 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4) 452 453 CHECK_RU_ALLOC(26); 454 CHECK_RU_ALLOC(52); 455 CHECK_RU_ALLOC(106); 456 CHECK_RU_ALLOC(242); 457 CHECK_RU_ALLOC(484); 458 CHECK_RU_ALLOC(996); 459 CHECK_RU_ALLOC(2x996); 460 461 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 462 status_rate->rate_idx.he_ru_alloc + 4); 463 break; 464 default: 465 WARN_ONCE(1, "Invalid SU BW %d\n", status_rate->rate_idx.bw); 466 } 467 468 pos += sizeof(struct ieee80211_radiotap_he); 469 } 470 471 if (status_rate || info->status.rates[0].idx < 0) 472 return; 473 474 /* IEEE80211_RADIOTAP_MCS 475 * IEEE80211_RADIOTAP_VHT */ 476 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { 477 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); 478 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 479 IEEE80211_RADIOTAP_MCS_HAVE_GI | 480 IEEE80211_RADIOTAP_MCS_HAVE_BW; 481 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 482 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 483 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 484 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 485 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) 486 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; 487 pos[2] = info->status.rates[0].idx; 488 pos += 3; 489 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { 490 u16 known = local->hw.radiotap_vht_details & 491 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 492 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 493 494 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); 495 496 /* required alignment from rthdr */ 497 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 498 499 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 500 put_unaligned_le16(known, pos); 501 pos += 2; 502 503 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 504 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 505 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 506 pos++; 507 508 /* u8 bandwidth */ 509 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 510 *pos = 1; 511 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 512 *pos = 4; 513 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 514 *pos = 11; 515 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ 516 *pos = 0; 517 pos++; 518 519 /* u8 mcs_nss[4] */ 520 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | 521 ieee80211_rate_get_vht_nss(&info->status.rates[0]); 522 pos += 4; 523 524 /* u8 coding */ 525 pos++; 526 /* u8 group_id */ 527 pos++; 528 /* u16 partial_aid */ 529 pos += 2; 530 } 531 } 532 533 /* 534 * Handles the tx for TDLS teardown frames. 535 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP 536 */ 537 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, 538 struct ieee80211_sub_if_data *sdata, 539 struct sk_buff *skb, u32 flags) 540 { 541 struct sk_buff *teardown_skb; 542 struct sk_buff *orig_teardown_skb; 543 bool is_teardown = false; 544 545 /* Get the teardown data we need and free the lock */ 546 spin_lock(&sdata->u.mgd.teardown_lock); 547 teardown_skb = sdata->u.mgd.teardown_skb; 548 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; 549 if ((skb == orig_teardown_skb) && teardown_skb) { 550 sdata->u.mgd.teardown_skb = NULL; 551 sdata->u.mgd.orig_teardown_skb = NULL; 552 is_teardown = true; 553 } 554 spin_unlock(&sdata->u.mgd.teardown_lock); 555 556 if (is_teardown) { 557 /* This mechanism relies on being able to get ACKs */ 558 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); 559 560 /* Check if peer has ACKed */ 561 if (flags & IEEE80211_TX_STAT_ACK) { 562 dev_kfree_skb_any(teardown_skb); 563 } else { 564 tdls_dbg(sdata, 565 "TDLS Resending teardown through AP\n"); 566 567 ieee80211_subif_start_xmit(teardown_skb, skb->dev); 568 } 569 } 570 } 571 572 static struct ieee80211_sub_if_data * 573 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) 574 { 575 struct ieee80211_sub_if_data *sdata; 576 struct ieee80211_hdr *hdr = (void *)skb->data; 577 578 if (skb->dev) { 579 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 580 if (!sdata->dev) 581 continue; 582 583 if (skb->dev == sdata->dev) 584 return sdata; 585 } 586 587 return NULL; 588 } 589 590 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 591 switch (sdata->vif.type) { 592 case NL80211_IFTYPE_P2P_DEVICE: 593 break; 594 case NL80211_IFTYPE_NAN: 595 if (sdata->u.nan.started) 596 break; 597 fallthrough; 598 default: 599 continue; 600 } 601 602 if (ether_addr_equal(sdata->vif.addr, hdr->addr2)) 603 return sdata; 604 } 605 606 return NULL; 607 } 608 609 static void ieee80211_report_ack_skb(struct ieee80211_local *local, 610 struct sk_buff *orig_skb, 611 bool acked, bool dropped, 612 ktime_t ack_hwtstamp) 613 { 614 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(orig_skb); 615 struct sk_buff *skb; 616 unsigned long flags; 617 618 spin_lock_irqsave(&local->ack_status_lock, flags); 619 skb = idr_remove(&local->ack_status_frames, info->status_data); 620 spin_unlock_irqrestore(&local->ack_status_lock, flags); 621 622 if (!skb) 623 return; 624 625 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { 626 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; 627 struct ieee80211_sub_if_data *sdata; 628 struct ieee80211_hdr *hdr = (void *)skb->data; 629 bool is_valid_ack_signal = 630 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 631 struct cfg80211_tx_status status = { 632 .cookie = cookie, 633 .buf = skb->data, 634 .len = skb->len, 635 .ack = acked, 636 }; 637 638 if (ieee80211_is_timing_measurement(orig_skb) || 639 ieee80211_is_ftm(orig_skb)) { 640 status.tx_tstamp = 641 ktime_to_ns(skb_hwtstamps(orig_skb)->hwtstamp); 642 status.ack_tstamp = ktime_to_ns(ack_hwtstamp); 643 } 644 645 rcu_read_lock(); 646 sdata = ieee80211_sdata_from_skb(local, skb); 647 if (sdata) { 648 if (skb->protocol == sdata->control_port_protocol || 649 skb->protocol == cpu_to_be16(ETH_P_PREAUTH)) 650 cfg80211_control_port_tx_status(&sdata->wdev, 651 cookie, 652 skb->data, 653 skb->len, 654 acked, 655 GFP_ATOMIC); 656 else if (ieee80211_is_any_nullfunc(hdr->frame_control)) 657 cfg80211_probe_status(sdata->dev, hdr->addr1, 658 cookie, 659 info->status.link_valid ? 660 info->status.link_id : -1, 661 acked, 662 info->status.ack_signal, 663 is_valid_ack_signal, 664 GFP_ATOMIC); 665 else if (ieee80211_is_mgmt(hdr->frame_control)) 666 cfg80211_mgmt_tx_status_ext(&sdata->wdev, 667 &status, 668 GFP_ATOMIC); 669 else 670 pr_warn("Unknown status report in ack skb\n"); 671 672 } 673 rcu_read_unlock(); 674 675 dev_kfree_skb_any(skb); 676 } else if (dropped) { 677 dev_kfree_skb_any(skb); 678 } else { 679 /* consumes skb */ 680 skb_complete_wifi_ack(skb, acked); 681 } 682 } 683 684 static void ieee80211_handle_smps_status(struct ieee80211_sub_if_data *sdata, 685 bool acked, u16 status_data) 686 { 687 u16 sub_data = u16_get_bits(status_data, IEEE80211_STATUS_SUBDATA_MASK); 688 enum ieee80211_smps_mode smps_mode = sub_data & 3; 689 int link_id = (sub_data >> 2); 690 struct ieee80211_link_data *link; 691 692 if (!sdata || !ieee80211_sdata_running(sdata)) 693 return; 694 695 if (!acked) 696 return; 697 698 if (sdata->vif.type != NL80211_IFTYPE_STATION) 699 return; 700 701 if (WARN(link_id >= ARRAY_SIZE(sdata->link), 702 "bad SMPS status link: %d\n", link_id)) 703 return; 704 705 link = rcu_dereference(sdata->link[link_id]); 706 if (!link) 707 return; 708 709 /* 710 * This update looks racy, but isn't, the only other place 711 * updating this variable is in managed mode before assoc, 712 * and we have to be associated to have a status from the 713 * action frame TX, since we cannot send it while we're not 714 * associated yet. 715 */ 716 link->smps_mode = smps_mode; 717 wiphy_work_queue(sdata->local->hw.wiphy, &link->u.mgd.recalc_smps); 718 } 719 720 static void 721 ieee80211_handle_teardown_ttlm_status(struct ieee80211_sub_if_data *sdata, 722 bool acked) 723 { 724 if (!sdata || !ieee80211_sdata_running(sdata)) 725 return; 726 727 if (!acked) 728 return; 729 730 if (sdata->vif.type != NL80211_IFTYPE_STATION) 731 return; 732 733 wiphy_work_queue(sdata->local->hw.wiphy, 734 &sdata->u.mgd.teardown_ttlm_work); 735 } 736 737 static void 738 ieee80211_handle_uhr_omp_status(struct ieee80211_sub_if_data *sdata, bool acked) 739 { 740 if (!sdata || !ieee80211_sdata_running(sdata)) 741 return; 742 743 if (sdata->vif.type != NL80211_IFTYPE_STATION) 744 return; 745 746 sdata->u.mgd.uhr_omp.acked = acked; 747 748 if (!acked) { 749 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 750 &sdata->u.mgd.uhr_omp.status_work, 0); 751 return; 752 } 753 754 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 755 &sdata->u.mgd.uhr_omp.status_work, 756 us_to_ktime(sdata->u.mgd.uhr_omp.timeout_us)); 757 } 758 759 static void ieee80211_report_used_skb(struct ieee80211_local *local, 760 struct sk_buff *skb, bool dropped, 761 ktime_t ack_hwtstamp) 762 { 763 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 764 u16 tx_time_est = ieee80211_info_get_tx_time_est(info); 765 struct ieee80211_hdr *hdr = (void *)skb->data; 766 bool acked = info->flags & IEEE80211_TX_STAT_ACK; 767 768 if (dropped) 769 acked = false; 770 771 if (tx_time_est) { 772 struct sta_info *sta; 773 774 rcu_read_lock(); 775 776 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 777 ieee80211_sta_update_pending_airtime(local, sta, 778 skb_get_queue_mapping(skb), 779 tx_time_est, 780 true, info->tx_time_mc); 781 rcu_read_unlock(); 782 } 783 784 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { 785 struct ieee80211_sub_if_data *sdata; 786 787 rcu_read_lock(); 788 789 sdata = ieee80211_sdata_from_skb(local, skb); 790 791 if (!sdata) { 792 skb->dev = NULL; 793 } else if (!dropped) { 794 /* Check to see if packet is a TDLS teardown packet */ 795 if (ieee80211_is_data(hdr->frame_control) && 796 (ieee80211_get_tdls_action(skb) == 797 WLAN_TDLS_TEARDOWN)) { 798 ieee80211_tdls_td_tx_handle(local, sdata, skb, 799 info->flags); 800 } else if (ieee80211_s1g_is_twt_setup(skb)) { 801 if (!acked) { 802 struct sk_buff *qskb; 803 804 qskb = skb_clone(skb, GFP_ATOMIC); 805 if (qskb) { 806 skb_queue_tail(&sdata->status_queue, 807 qskb); 808 wiphy_work_queue(local->hw.wiphy, 809 &sdata->work); 810 } 811 } 812 } else { 813 ieee80211_mgd_conn_tx_status(sdata, 814 hdr->frame_control, 815 acked); 816 } 817 } 818 819 rcu_read_unlock(); 820 } else if (info->status_data_idr) { 821 ieee80211_report_ack_skb(local, skb, acked, dropped, 822 ack_hwtstamp); 823 } else if (info->status_data) { 824 struct ieee80211_sub_if_data *sdata; 825 826 rcu_read_lock(); 827 828 sdata = ieee80211_sdata_from_skb(local, skb); 829 830 switch (u16_get_bits(info->status_data, 831 IEEE80211_STATUS_TYPE_MASK)) { 832 case IEEE80211_STATUS_TYPE_SMPS: 833 ieee80211_handle_smps_status(sdata, acked, 834 info->status_data); 835 break; 836 case IEEE80211_STATUS_TYPE_NEG_TTLM: 837 ieee80211_handle_teardown_ttlm_status(sdata, acked); 838 break; 839 case IEEE80211_STATUS_TYPE_UHR_OMP: 840 ieee80211_handle_uhr_omp_status(sdata, acked); 841 break; 842 } 843 rcu_read_unlock(); 844 } 845 846 if (!dropped && skb->destructor) { 847 skb->wifi_acked_valid = 1; 848 skb->wifi_acked = acked; 849 } 850 851 ieee80211_led_tx(local); 852 853 if (skb_has_frag_list(skb)) { 854 kfree_skb_list(skb_shinfo(skb)->frag_list); 855 skb_shinfo(skb)->frag_list = NULL; 856 } 857 } 858 859 /* 860 * Use a static threshold for now, best value to be determined 861 * by testing ... 862 * Should it depend on: 863 * - on # of retransmissions 864 * - current throughput (higher value for higher tpt)? 865 */ 866 #define STA_LOST_PKT_THRESHOLD 50 867 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */ 868 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ 869 870 static void ieee80211_lost_packet(struct sta_info *sta, 871 struct ieee80211_tx_info *info) 872 { 873 unsigned long pkt_time = STA_LOST_PKT_TIME; 874 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD; 875 876 /* If driver relies on its own algorithm for station kickout, skip 877 * mac80211 packet loss mechanism. 878 */ 879 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) 880 return; 881 882 /* This packet was aggregated but doesn't carry status info */ 883 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 884 !(info->flags & IEEE80211_TX_STAT_AMPDU)) 885 return; 886 887 sta->deflink.status_stats.lost_packets++; 888 if (sta->sta.tdls) { 889 pkt_time = STA_LOST_TDLS_PKT_TIME; 890 pkt_thr = STA_LOST_PKT_THRESHOLD; 891 } 892 893 /* 894 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD 895 * of the last packets were lost, and that no ACK was received in the 896 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss 897 * mechanism. 898 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME 899 */ 900 if (sta->deflink.status_stats.lost_packets < pkt_thr || 901 !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time)) 902 return; 903 904 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 905 sta->deflink.status_stats.lost_packets, 906 GFP_ATOMIC); 907 sta->deflink.status_stats.lost_packets = 0; 908 } 909 910 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 911 struct ieee80211_tx_info *info, 912 int *retry_count) 913 { 914 int count = -1; 915 int i; 916 917 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 918 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 919 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 920 /* just the first aggr frame carry status info */ 921 info->status.rates[i].idx = -1; 922 info->status.rates[i].count = 0; 923 break; 924 } else if (info->status.rates[i].idx < 0) { 925 break; 926 } else if (i >= hw->max_report_rates) { 927 /* the HW cannot have attempted that rate */ 928 info->status.rates[i].idx = -1; 929 info->status.rates[i].count = 0; 930 break; 931 } 932 933 count += info->status.rates[i].count; 934 } 935 936 if (count < 0) 937 count = 0; 938 939 *retry_count = count; 940 return i - 1; 941 } 942 943 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 944 int retry_count, struct ieee80211_tx_status *status) 945 { 946 struct sk_buff *skb2; 947 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 948 struct ieee80211_sub_if_data *sdata; 949 struct net_device *prev_dev = NULL; 950 int rtap_len; 951 952 /* send frame to monitor interfaces now */ 953 rtap_len = ieee80211_tx_radiotap_len(info, status); 954 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 955 pr_err("ieee80211_tx_status: headroom too small\n"); 956 dev_kfree_skb(skb); 957 return; 958 } 959 ieee80211_add_tx_radiotap_header(local, skb, retry_count, 960 rtap_len, status); 961 962 /* XXX: is this sufficient for BPF? */ 963 skb_reset_mac_header(skb); 964 skb->ip_summed = CHECKSUM_UNNECESSARY; 965 skb->pkt_type = PACKET_OTHERHOST; 966 skb->protocol = htons(ETH_P_802_2); 967 memset(skb->cb, 0, sizeof(skb->cb)); 968 969 rcu_read_lock(); 970 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 971 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 972 if (!ieee80211_sdata_running(sdata)) 973 continue; 974 975 if (sdata->u.mntr.flags & MONITOR_FLAG_SKIP_TX) 976 continue; 977 978 if (prev_dev) { 979 skb2 = skb_clone(skb, GFP_ATOMIC); 980 if (skb2) { 981 skb2->dev = prev_dev; 982 netif_rx(skb2); 983 } 984 } 985 986 prev_dev = sdata->dev; 987 } 988 } 989 if (prev_dev) { 990 skb->dev = prev_dev; 991 netif_rx(skb); 992 skb = NULL; 993 } 994 rcu_read_unlock(); 995 dev_kfree_skb(skb); 996 } 997 998 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 999 struct ieee80211_tx_status *status, 1000 int rates_idx, int retry_count) 1001 { 1002 struct sk_buff *skb = status->skb; 1003 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1004 struct ieee80211_local *local = hw_to_local(hw); 1005 struct ieee80211_tx_info *info = status->info; 1006 struct sta_info *sta; 1007 __le16 fc; 1008 bool acked; 1009 bool noack_success; 1010 struct ieee80211_bar *bar; 1011 int tid = IEEE80211_NUM_TIDS; 1012 1013 fc = hdr->frame_control; 1014 1015 if (status->sta) { 1016 sta = container_of(status->sta, struct sta_info, sta); 1017 1018 if (info->flags & IEEE80211_TX_STATUS_EOSP) 1019 clear_sta_flag(sta, WLAN_STA_SP); 1020 1021 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1022 noack_success = !!(info->flags & 1023 IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1024 1025 /* mesh Peer Service Period support */ 1026 if (ieee80211_vif_is_mesh(&sta->sdata->vif) && 1027 ieee80211_is_data_qos(fc)) 1028 ieee80211_mpsp_trigger_process( 1029 ieee80211_get_qos_ctl(hdr), sta, true, acked); 1030 1031 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && 1032 (ieee80211_is_data(hdr->frame_control)) && 1033 (rates_idx != -1)) 1034 sta->deflink.tx_stats.last_rate = 1035 info->status.rates[rates_idx]; 1036 1037 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 1038 (ieee80211_is_data_qos(fc))) { 1039 u16 ssn; 1040 u8 *qc; 1041 1042 qc = ieee80211_get_qos_ctl(hdr); 1043 tid = qc[0] & 0xf; 1044 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 1045 & IEEE80211_SCTL_SEQ); 1046 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, 1047 tid, ssn); 1048 } else if (ieee80211_is_data_qos(fc)) { 1049 u8 *qc = ieee80211_get_qos_ctl(hdr); 1050 1051 tid = qc[0] & 0xf; 1052 } 1053 1054 if (!acked && ieee80211_is_back_req(fc)) { 1055 u16 control; 1056 1057 /* 1058 * BAR failed, store the last SSN and retry sending 1059 * the BAR when the next unicast transmission on the 1060 * same TID succeeds. 1061 */ 1062 bar = (struct ieee80211_bar *) skb->data; 1063 control = le16_to_cpu(bar->control); 1064 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { 1065 u16 ssn = le16_to_cpu(bar->start_seq_num); 1066 1067 tid = (control & 1068 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 1069 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 1070 1071 ieee80211_set_bar_pending(sta, tid, ssn); 1072 } 1073 } 1074 1075 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 1076 ieee80211_handle_filtered_frame(local, sta, skb); 1077 return; 1078 } else if (ieee80211_is_data_present(fc)) { 1079 if (!acked && !noack_success) 1080 sta->deflink.status_stats.msdu_failed[tid]++; 1081 1082 sta->deflink.status_stats.msdu_retries[tid] += 1083 retry_count; 1084 } 1085 1086 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) 1087 ieee80211_frame_acked(sta, skb); 1088 1089 } 1090 1091 /* SNMP counters 1092 * Fragments are passed to low-level drivers as separate skbs, so these 1093 * are actually fragments, not frames. Update frame counters only for 1094 * the first fragment of the frame. */ 1095 if ((info->flags & IEEE80211_TX_STAT_ACK) || 1096 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 1097 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 1098 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1099 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 1100 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1101 if (retry_count > 0) 1102 I802_DEBUG_INC(local->dot11RetryCount); 1103 if (retry_count > 1) 1104 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1105 } 1106 1107 /* This counter shall be incremented for an acknowledged MPDU 1108 * with an individual address in the address 1 field or an MPDU 1109 * with a multicast address in the address 1 field of type Data 1110 * or Management. */ 1111 if (!is_multicast_ether_addr(hdr->addr1) || 1112 ieee80211_is_data(fc) || 1113 ieee80211_is_mgmt(fc)) 1114 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1115 } else { 1116 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1117 I802_DEBUG_INC(local->dot11FailedCount); 1118 } 1119 1120 if (ieee80211_is_any_nullfunc(fc) && 1121 ieee80211_has_pm(fc) && 1122 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1123 !(info->flags & IEEE80211_TX_CTL_INJECTED) && 1124 local->ps_sdata && !(local->scanning)) { 1125 if (info->flags & IEEE80211_TX_STAT_ACK) 1126 local->ps_sdata->u.mgd.flags |= 1127 IEEE80211_STA_NULLFUNC_ACKED; 1128 mod_timer(&local->dynamic_ps_timer, 1129 jiffies + msecs_to_jiffies(10)); 1130 } 1131 1132 ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp); 1133 1134 /* 1135 * This is a bit racy but we can avoid a lot of work 1136 * with this test... 1137 */ 1138 if (local->tx_mntrs) 1139 ieee80211_tx_monitor(local, skb, retry_count, status); 1140 else if (status->free_list) 1141 list_add_tail(&skb->list, status->free_list); 1142 else 1143 dev_kfree_skb(skb); 1144 } 1145 1146 void ieee80211_tx_status_skb(struct ieee80211_hw *hw, struct sk_buff *skb) 1147 { 1148 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1149 struct ieee80211_local *local = hw_to_local(hw); 1150 struct ieee80211_tx_status status = { 1151 .skb = skb, 1152 .info = IEEE80211_SKB_CB(skb), 1153 }; 1154 struct sta_info *sta; 1155 1156 rcu_read_lock(); 1157 1158 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 1159 if (sta) 1160 status.sta = &sta->sta; 1161 1162 ieee80211_tx_status_ext(hw, &status); 1163 rcu_read_unlock(); 1164 } 1165 EXPORT_SYMBOL(ieee80211_tx_status_skb); 1166 1167 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1168 struct ieee80211_tx_status *status) 1169 { 1170 struct ieee80211_local *local = hw_to_local(hw); 1171 struct ieee80211_tx_info *info = status->info; 1172 struct ieee80211_sta *pubsta = status->sta; 1173 struct sk_buff *skb = status->skb; 1174 struct sta_info *sta = NULL; 1175 int rates_idx, retry_count; 1176 bool acked, noack_success, ack_signal_valid; 1177 u16 tx_time_est; 1178 1179 if (pubsta) { 1180 sta = container_of(pubsta, struct sta_info, sta); 1181 1182 if (status->n_rates) 1183 sta->deflink.tx_stats.last_rate_info = 1184 status->rates[status->n_rates - 1].rate_idx; 1185 } 1186 1187 if (skb && (tx_time_est = 1188 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) { 1189 /* Do this here to avoid the expensive lookup of the sta 1190 * in ieee80211_report_used_skb(). 1191 */ 1192 bool mcast = IEEE80211_SKB_CB(skb)->tx_time_mc; 1193 ieee80211_sta_update_pending_airtime(local, sta, 1194 skb_get_queue_mapping(skb), 1195 tx_time_est, 1196 true, mcast); 1197 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0); 1198 } 1199 1200 if (!status->info) 1201 goto free; 1202 1203 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 1204 1205 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1206 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1207 ack_signal_valid = 1208 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 1209 1210 if (pubsta) { 1211 struct ieee80211_sub_if_data *sdata = sta->sdata; 1212 1213 if (!acked && !noack_success) 1214 sta->deflink.status_stats.retry_failed++; 1215 sta->deflink.status_stats.retry_count += retry_count; 1216 1217 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 1218 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1219 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1220 ieee80211_sta_tx_notify(sdata, (void *) skb->data, 1221 acked, info->status.tx_time); 1222 1223 if (acked) { 1224 sta->deflink.status_stats.last_ack = jiffies; 1225 1226 if (sta->deflink.status_stats.lost_packets) 1227 sta->deflink.status_stats.lost_packets = 0; 1228 1229 /* Track when last packet was ACKed */ 1230 sta->deflink.status_stats.last_pkt_time = jiffies; 1231 1232 /* Reset connection monitor */ 1233 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1234 unlikely(sdata->u.mgd.probe_send_count > 0)) 1235 sdata->u.mgd.probe_send_count = 0; 1236 1237 if (ack_signal_valid) { 1238 sta->deflink.status_stats.last_ack_signal = 1239 (s8)info->status.ack_signal; 1240 sta->deflink.status_stats.ack_signal_filled = true; 1241 ewma_avg_signal_add(&sta->deflink.status_stats.avg_ack_signal, 1242 -info->status.ack_signal); 1243 } 1244 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1245 /* 1246 * The STA is in power save mode, so assume 1247 * that this TX packet failed because of that. 1248 */ 1249 if (skb) 1250 ieee80211_handle_filtered_frame(local, sta, skb); 1251 return; 1252 } else if (noack_success) { 1253 /* nothing to do here, do not account as lost */ 1254 } else { 1255 ieee80211_lost_packet(sta, info); 1256 } 1257 } 1258 1259 rate_control_tx_status(local, status); 1260 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1261 ieee80211s_update_metric(local, sta, status); 1262 } 1263 1264 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1265 return __ieee80211_tx_status(hw, status, rates_idx, 1266 retry_count); 1267 1268 if (acked || noack_success) { 1269 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1270 if (!pubsta) 1271 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1272 if (retry_count > 0) 1273 I802_DEBUG_INC(local->dot11RetryCount); 1274 if (retry_count > 1) 1275 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1276 } else { 1277 I802_DEBUG_INC(local->dot11FailedCount); 1278 } 1279 1280 free: 1281 if (!skb) 1282 return; 1283 1284 ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp); 1285 if (status->free_list) 1286 list_add_tail(&skb->list, status->free_list); 1287 else 1288 dev_kfree_skb(skb); 1289 } 1290 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1291 1292 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1293 struct ieee80211_sta *pubsta, 1294 struct ieee80211_tx_info *info) 1295 { 1296 struct ieee80211_local *local = hw_to_local(hw); 1297 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1298 struct ieee80211_tx_status status = { 1299 .info = info, 1300 .sta = pubsta, 1301 }; 1302 1303 rate_control_tx_status(local, &status); 1304 1305 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1306 sta->deflink.tx_stats.last_rate = info->status.rates[0]; 1307 } 1308 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1309 1310 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1311 { 1312 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1313 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1314 num_packets, GFP_ATOMIC); 1315 } 1316 EXPORT_SYMBOL(ieee80211_report_low_ack); 1317 1318 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1319 { 1320 struct ieee80211_local *local = hw_to_local(hw); 1321 ktime_t kt = ktime_set(0, 0); 1322 1323 ieee80211_report_used_skb(local, skb, true, kt); 1324 dev_kfree_skb_any(skb); 1325 } 1326 EXPORT_SYMBOL(ieee80211_free_txskb); 1327 1328 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1329 struct sk_buff_head *skbs) 1330 { 1331 struct sk_buff *skb; 1332 1333 while ((skb = __skb_dequeue(skbs))) 1334 ieee80211_free_txskb(hw, skb); 1335 } 1336 EXPORT_SYMBOL(ieee80211_purge_tx_queue); 1337