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, acked, 659 info->status.ack_signal, 660 is_valid_ack_signal, 661 GFP_ATOMIC); 662 else if (ieee80211_is_mgmt(hdr->frame_control)) 663 cfg80211_mgmt_tx_status_ext(&sdata->wdev, 664 &status, 665 GFP_ATOMIC); 666 else 667 pr_warn("Unknown status report in ack skb\n"); 668 669 } 670 rcu_read_unlock(); 671 672 dev_kfree_skb_any(skb); 673 } else if (dropped) { 674 dev_kfree_skb_any(skb); 675 } else { 676 /* consumes skb */ 677 skb_complete_wifi_ack(skb, acked); 678 } 679 } 680 681 static void ieee80211_handle_smps_status(struct ieee80211_sub_if_data *sdata, 682 bool acked, u16 status_data) 683 { 684 u16 sub_data = u16_get_bits(status_data, IEEE80211_STATUS_SUBDATA_MASK); 685 enum ieee80211_smps_mode smps_mode = sub_data & 3; 686 int link_id = (sub_data >> 2); 687 struct ieee80211_link_data *link; 688 689 if (!sdata || !ieee80211_sdata_running(sdata)) 690 return; 691 692 if (!acked) 693 return; 694 695 if (sdata->vif.type != NL80211_IFTYPE_STATION) 696 return; 697 698 if (WARN(link_id >= ARRAY_SIZE(sdata->link), 699 "bad SMPS status link: %d\n", link_id)) 700 return; 701 702 link = rcu_dereference(sdata->link[link_id]); 703 if (!link) 704 return; 705 706 /* 707 * This update looks racy, but isn't, the only other place 708 * updating this variable is in managed mode before assoc, 709 * and we have to be associated to have a status from the 710 * action frame TX, since we cannot send it while we're not 711 * associated yet. 712 */ 713 link->smps_mode = smps_mode; 714 wiphy_work_queue(sdata->local->hw.wiphy, &link->u.mgd.recalc_smps); 715 } 716 717 static void 718 ieee80211_handle_teardown_ttlm_status(struct ieee80211_sub_if_data *sdata, 719 bool acked) 720 { 721 if (!sdata || !ieee80211_sdata_running(sdata)) 722 return; 723 724 if (!acked) 725 return; 726 727 if (sdata->vif.type != NL80211_IFTYPE_STATION) 728 return; 729 730 wiphy_work_queue(sdata->local->hw.wiphy, 731 &sdata->u.mgd.teardown_ttlm_work); 732 } 733 734 static void ieee80211_report_used_skb(struct ieee80211_local *local, 735 struct sk_buff *skb, bool dropped, 736 ktime_t ack_hwtstamp) 737 { 738 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 739 u16 tx_time_est = ieee80211_info_get_tx_time_est(info); 740 struct ieee80211_hdr *hdr = (void *)skb->data; 741 bool acked = info->flags & IEEE80211_TX_STAT_ACK; 742 743 if (dropped) 744 acked = false; 745 746 if (tx_time_est) { 747 struct sta_info *sta; 748 749 rcu_read_lock(); 750 751 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 752 ieee80211_sta_update_pending_airtime(local, sta, 753 skb_get_queue_mapping(skb), 754 tx_time_est, 755 true); 756 rcu_read_unlock(); 757 } 758 759 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { 760 struct ieee80211_sub_if_data *sdata; 761 762 rcu_read_lock(); 763 764 sdata = ieee80211_sdata_from_skb(local, skb); 765 766 if (!sdata) { 767 skb->dev = NULL; 768 } else if (!dropped) { 769 /* Check to see if packet is a TDLS teardown packet */ 770 if (ieee80211_is_data(hdr->frame_control) && 771 (ieee80211_get_tdls_action(skb) == 772 WLAN_TDLS_TEARDOWN)) { 773 ieee80211_tdls_td_tx_handle(local, sdata, skb, 774 info->flags); 775 } else if (ieee80211_s1g_is_twt_setup(skb)) { 776 if (!acked) { 777 struct sk_buff *qskb; 778 779 qskb = skb_clone(skb, GFP_ATOMIC); 780 if (qskb) { 781 skb_queue_tail(&sdata->status_queue, 782 qskb); 783 wiphy_work_queue(local->hw.wiphy, 784 &sdata->work); 785 } 786 } 787 } else { 788 ieee80211_mgd_conn_tx_status(sdata, 789 hdr->frame_control, 790 acked); 791 } 792 } 793 794 rcu_read_unlock(); 795 } else if (info->status_data_idr) { 796 ieee80211_report_ack_skb(local, skb, acked, dropped, 797 ack_hwtstamp); 798 } else if (info->status_data) { 799 struct ieee80211_sub_if_data *sdata; 800 801 rcu_read_lock(); 802 803 sdata = ieee80211_sdata_from_skb(local, skb); 804 805 switch (u16_get_bits(info->status_data, 806 IEEE80211_STATUS_TYPE_MASK)) { 807 case IEEE80211_STATUS_TYPE_SMPS: 808 ieee80211_handle_smps_status(sdata, acked, 809 info->status_data); 810 break; 811 case IEEE80211_STATUS_TYPE_NEG_TTLM: 812 ieee80211_handle_teardown_ttlm_status(sdata, acked); 813 break; 814 } 815 rcu_read_unlock(); 816 } 817 818 if (!dropped && skb->destructor) { 819 skb->wifi_acked_valid = 1; 820 skb->wifi_acked = acked; 821 } 822 823 ieee80211_led_tx(local); 824 825 if (skb_has_frag_list(skb)) { 826 kfree_skb_list(skb_shinfo(skb)->frag_list); 827 skb_shinfo(skb)->frag_list = NULL; 828 } 829 } 830 831 /* 832 * Use a static threshold for now, best value to be determined 833 * by testing ... 834 * Should it depend on: 835 * - on # of retransmissions 836 * - current throughput (higher value for higher tpt)? 837 */ 838 #define STA_LOST_PKT_THRESHOLD 50 839 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */ 840 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ 841 842 static void ieee80211_lost_packet(struct sta_info *sta, 843 struct ieee80211_tx_info *info) 844 { 845 unsigned long pkt_time = STA_LOST_PKT_TIME; 846 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD; 847 848 /* If driver relies on its own algorithm for station kickout, skip 849 * mac80211 packet loss mechanism. 850 */ 851 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) 852 return; 853 854 /* This packet was aggregated but doesn't carry status info */ 855 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 856 !(info->flags & IEEE80211_TX_STAT_AMPDU)) 857 return; 858 859 sta->deflink.status_stats.lost_packets++; 860 if (sta->sta.tdls) { 861 pkt_time = STA_LOST_TDLS_PKT_TIME; 862 pkt_thr = STA_LOST_PKT_THRESHOLD; 863 } 864 865 /* 866 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD 867 * of the last packets were lost, and that no ACK was received in the 868 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss 869 * mechanism. 870 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME 871 */ 872 if (sta->deflink.status_stats.lost_packets < pkt_thr || 873 !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time)) 874 return; 875 876 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 877 sta->deflink.status_stats.lost_packets, 878 GFP_ATOMIC); 879 sta->deflink.status_stats.lost_packets = 0; 880 } 881 882 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 883 struct ieee80211_tx_info *info, 884 int *retry_count) 885 { 886 int count = -1; 887 int i; 888 889 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 890 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 891 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 892 /* just the first aggr frame carry status info */ 893 info->status.rates[i].idx = -1; 894 info->status.rates[i].count = 0; 895 break; 896 } else if (info->status.rates[i].idx < 0) { 897 break; 898 } else if (i >= hw->max_report_rates) { 899 /* the HW cannot have attempted that rate */ 900 info->status.rates[i].idx = -1; 901 info->status.rates[i].count = 0; 902 break; 903 } 904 905 count += info->status.rates[i].count; 906 } 907 908 if (count < 0) 909 count = 0; 910 911 *retry_count = count; 912 return i - 1; 913 } 914 915 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 916 int retry_count, struct ieee80211_tx_status *status) 917 { 918 struct sk_buff *skb2; 919 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 920 struct ieee80211_sub_if_data *sdata; 921 struct net_device *prev_dev = NULL; 922 int rtap_len; 923 924 /* send frame to monitor interfaces now */ 925 rtap_len = ieee80211_tx_radiotap_len(info, status); 926 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 927 pr_err("ieee80211_tx_status: headroom too small\n"); 928 dev_kfree_skb(skb); 929 return; 930 } 931 ieee80211_add_tx_radiotap_header(local, skb, retry_count, 932 rtap_len, status); 933 934 /* XXX: is this sufficient for BPF? */ 935 skb_reset_mac_header(skb); 936 skb->ip_summed = CHECKSUM_UNNECESSARY; 937 skb->pkt_type = PACKET_OTHERHOST; 938 skb->protocol = htons(ETH_P_802_2); 939 memset(skb->cb, 0, sizeof(skb->cb)); 940 941 rcu_read_lock(); 942 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 943 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 944 if (!ieee80211_sdata_running(sdata)) 945 continue; 946 947 if (sdata->u.mntr.flags & MONITOR_FLAG_SKIP_TX) 948 continue; 949 950 if (prev_dev) { 951 skb2 = skb_clone(skb, GFP_ATOMIC); 952 if (skb2) { 953 skb2->dev = prev_dev; 954 netif_rx(skb2); 955 } 956 } 957 958 prev_dev = sdata->dev; 959 } 960 } 961 if (prev_dev) { 962 skb->dev = prev_dev; 963 netif_rx(skb); 964 skb = NULL; 965 } 966 rcu_read_unlock(); 967 dev_kfree_skb(skb); 968 } 969 970 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 971 struct ieee80211_tx_status *status, 972 int rates_idx, int retry_count) 973 { 974 struct sk_buff *skb = status->skb; 975 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 976 struct ieee80211_local *local = hw_to_local(hw); 977 struct ieee80211_tx_info *info = status->info; 978 struct sta_info *sta; 979 __le16 fc; 980 bool acked; 981 bool noack_success; 982 struct ieee80211_bar *bar; 983 int tid = IEEE80211_NUM_TIDS; 984 985 fc = hdr->frame_control; 986 987 if (status->sta) { 988 sta = container_of(status->sta, struct sta_info, sta); 989 990 if (info->flags & IEEE80211_TX_STATUS_EOSP) 991 clear_sta_flag(sta, WLAN_STA_SP); 992 993 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 994 noack_success = !!(info->flags & 995 IEEE80211_TX_STAT_NOACK_TRANSMITTED); 996 997 /* mesh Peer Service Period support */ 998 if (ieee80211_vif_is_mesh(&sta->sdata->vif) && 999 ieee80211_is_data_qos(fc)) 1000 ieee80211_mpsp_trigger_process( 1001 ieee80211_get_qos_ctl(hdr), sta, true, acked); 1002 1003 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && 1004 (ieee80211_is_data(hdr->frame_control)) && 1005 (rates_idx != -1)) 1006 sta->deflink.tx_stats.last_rate = 1007 info->status.rates[rates_idx]; 1008 1009 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 1010 (ieee80211_is_data_qos(fc))) { 1011 u16 ssn; 1012 u8 *qc; 1013 1014 qc = ieee80211_get_qos_ctl(hdr); 1015 tid = qc[0] & 0xf; 1016 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 1017 & IEEE80211_SCTL_SEQ); 1018 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, 1019 tid, ssn); 1020 } else if (ieee80211_is_data_qos(fc)) { 1021 u8 *qc = ieee80211_get_qos_ctl(hdr); 1022 1023 tid = qc[0] & 0xf; 1024 } 1025 1026 if (!acked && ieee80211_is_back_req(fc)) { 1027 u16 control; 1028 1029 /* 1030 * BAR failed, store the last SSN and retry sending 1031 * the BAR when the next unicast transmission on the 1032 * same TID succeeds. 1033 */ 1034 bar = (struct ieee80211_bar *) skb->data; 1035 control = le16_to_cpu(bar->control); 1036 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { 1037 u16 ssn = le16_to_cpu(bar->start_seq_num); 1038 1039 tid = (control & 1040 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 1041 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 1042 1043 ieee80211_set_bar_pending(sta, tid, ssn); 1044 } 1045 } 1046 1047 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 1048 ieee80211_handle_filtered_frame(local, sta, skb); 1049 return; 1050 } else if (ieee80211_is_data_present(fc)) { 1051 if (!acked && !noack_success) 1052 sta->deflink.status_stats.msdu_failed[tid]++; 1053 1054 sta->deflink.status_stats.msdu_retries[tid] += 1055 retry_count; 1056 } 1057 1058 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) 1059 ieee80211_frame_acked(sta, skb); 1060 1061 } 1062 1063 /* SNMP counters 1064 * Fragments are passed to low-level drivers as separate skbs, so these 1065 * are actually fragments, not frames. Update frame counters only for 1066 * the first fragment of the frame. */ 1067 if ((info->flags & IEEE80211_TX_STAT_ACK) || 1068 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 1069 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 1070 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1071 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 1072 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1073 if (retry_count > 0) 1074 I802_DEBUG_INC(local->dot11RetryCount); 1075 if (retry_count > 1) 1076 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1077 } 1078 1079 /* This counter shall be incremented for an acknowledged MPDU 1080 * with an individual address in the address 1 field or an MPDU 1081 * with a multicast address in the address 1 field of type Data 1082 * or Management. */ 1083 if (!is_multicast_ether_addr(hdr->addr1) || 1084 ieee80211_is_data(fc) || 1085 ieee80211_is_mgmt(fc)) 1086 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1087 } else { 1088 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1089 I802_DEBUG_INC(local->dot11FailedCount); 1090 } 1091 1092 if (ieee80211_is_any_nullfunc(fc) && 1093 ieee80211_has_pm(fc) && 1094 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1095 !(info->flags & IEEE80211_TX_CTL_INJECTED) && 1096 local->ps_sdata && !(local->scanning)) { 1097 if (info->flags & IEEE80211_TX_STAT_ACK) 1098 local->ps_sdata->u.mgd.flags |= 1099 IEEE80211_STA_NULLFUNC_ACKED; 1100 mod_timer(&local->dynamic_ps_timer, 1101 jiffies + msecs_to_jiffies(10)); 1102 } 1103 1104 ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp); 1105 1106 /* 1107 * This is a bit racy but we can avoid a lot of work 1108 * with this test... 1109 */ 1110 if (local->tx_mntrs) 1111 ieee80211_tx_monitor(local, skb, retry_count, status); 1112 else if (status->free_list) 1113 list_add_tail(&skb->list, status->free_list); 1114 else 1115 dev_kfree_skb(skb); 1116 } 1117 1118 void ieee80211_tx_status_skb(struct ieee80211_hw *hw, struct sk_buff *skb) 1119 { 1120 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1121 struct ieee80211_local *local = hw_to_local(hw); 1122 struct ieee80211_tx_status status = { 1123 .skb = skb, 1124 .info = IEEE80211_SKB_CB(skb), 1125 }; 1126 struct sta_info *sta; 1127 1128 rcu_read_lock(); 1129 1130 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 1131 if (sta) 1132 status.sta = &sta->sta; 1133 1134 ieee80211_tx_status_ext(hw, &status); 1135 rcu_read_unlock(); 1136 } 1137 EXPORT_SYMBOL(ieee80211_tx_status_skb); 1138 1139 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1140 struct ieee80211_tx_status *status) 1141 { 1142 struct ieee80211_local *local = hw_to_local(hw); 1143 struct ieee80211_tx_info *info = status->info; 1144 struct ieee80211_sta *pubsta = status->sta; 1145 struct sk_buff *skb = status->skb; 1146 struct sta_info *sta = NULL; 1147 int rates_idx, retry_count; 1148 bool acked, noack_success, ack_signal_valid; 1149 u16 tx_time_est; 1150 1151 if (pubsta) { 1152 sta = container_of(pubsta, struct sta_info, sta); 1153 1154 if (status->n_rates) 1155 sta->deflink.tx_stats.last_rate_info = 1156 status->rates[status->n_rates - 1].rate_idx; 1157 } 1158 1159 if (skb && (tx_time_est = 1160 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) { 1161 /* Do this here to avoid the expensive lookup of the sta 1162 * in ieee80211_report_used_skb(). 1163 */ 1164 ieee80211_sta_update_pending_airtime(local, sta, 1165 skb_get_queue_mapping(skb), 1166 tx_time_est, 1167 true); 1168 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0); 1169 } 1170 1171 if (!status->info) 1172 goto free; 1173 1174 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 1175 1176 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1177 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1178 ack_signal_valid = 1179 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 1180 1181 if (pubsta) { 1182 struct ieee80211_sub_if_data *sdata = sta->sdata; 1183 1184 if (!acked && !noack_success) 1185 sta->deflink.status_stats.retry_failed++; 1186 sta->deflink.status_stats.retry_count += retry_count; 1187 1188 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 1189 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1190 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1191 ieee80211_sta_tx_notify(sdata, (void *) skb->data, 1192 acked, info->status.tx_time); 1193 1194 if (acked) { 1195 sta->deflink.status_stats.last_ack = jiffies; 1196 1197 if (sta->deflink.status_stats.lost_packets) 1198 sta->deflink.status_stats.lost_packets = 0; 1199 1200 /* Track when last packet was ACKed */ 1201 sta->deflink.status_stats.last_pkt_time = jiffies; 1202 1203 /* Reset connection monitor */ 1204 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1205 unlikely(sdata->u.mgd.probe_send_count > 0)) 1206 sdata->u.mgd.probe_send_count = 0; 1207 1208 if (ack_signal_valid) { 1209 sta->deflink.status_stats.last_ack_signal = 1210 (s8)info->status.ack_signal; 1211 sta->deflink.status_stats.ack_signal_filled = true; 1212 ewma_avg_signal_add(&sta->deflink.status_stats.avg_ack_signal, 1213 -info->status.ack_signal); 1214 } 1215 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1216 /* 1217 * The STA is in power save mode, so assume 1218 * that this TX packet failed because of that. 1219 */ 1220 if (skb) 1221 ieee80211_handle_filtered_frame(local, sta, skb); 1222 return; 1223 } else if (noack_success) { 1224 /* nothing to do here, do not account as lost */ 1225 } else { 1226 ieee80211_lost_packet(sta, info); 1227 } 1228 } 1229 1230 rate_control_tx_status(local, status); 1231 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1232 ieee80211s_update_metric(local, sta, status); 1233 } 1234 1235 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1236 return __ieee80211_tx_status(hw, status, rates_idx, 1237 retry_count); 1238 1239 if (acked || noack_success) { 1240 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1241 if (!pubsta) 1242 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1243 if (retry_count > 0) 1244 I802_DEBUG_INC(local->dot11RetryCount); 1245 if (retry_count > 1) 1246 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1247 } else { 1248 I802_DEBUG_INC(local->dot11FailedCount); 1249 } 1250 1251 free: 1252 if (!skb) 1253 return; 1254 1255 ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp); 1256 if (status->free_list) 1257 list_add_tail(&skb->list, status->free_list); 1258 else 1259 dev_kfree_skb(skb); 1260 } 1261 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1262 1263 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1264 struct ieee80211_sta *pubsta, 1265 struct ieee80211_tx_info *info) 1266 { 1267 struct ieee80211_local *local = hw_to_local(hw); 1268 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1269 struct ieee80211_tx_status status = { 1270 .info = info, 1271 .sta = pubsta, 1272 }; 1273 1274 rate_control_tx_status(local, &status); 1275 1276 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1277 sta->deflink.tx_stats.last_rate = info->status.rates[0]; 1278 } 1279 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1280 1281 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1282 { 1283 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1284 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1285 num_packets, GFP_ATOMIC); 1286 } 1287 EXPORT_SYMBOL(ieee80211_report_low_ack); 1288 1289 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1290 { 1291 struct ieee80211_local *local = hw_to_local(hw); 1292 ktime_t kt = ktime_set(0, 0); 1293 1294 ieee80211_report_used_skb(local, skb, true, kt); 1295 dev_kfree_skb_any(skb); 1296 } 1297 EXPORT_SYMBOL(ieee80211_free_txskb); 1298 1299 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1300 struct sk_buff_head *skbs) 1301 { 1302 struct sk_buff *skb; 1303 1304 while ((skb = __skb_dequeue(skbs))) 1305 ieee80211_free_txskb(hw, skb); 1306 } 1307 EXPORT_SYMBOL(ieee80211_purge_tx_queue); 1308