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 2021-2023 Intel Corporation 9 */ 10 11 #include <linux/export.h> 12 #include <linux/etherdevice.h> 13 #include <net/mac80211.h> 14 #include <asm/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->status.rates[0].idx >= 0 && 299 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | 300 IEEE80211_TX_RC_VHT_MCS))) { 301 struct ieee80211_supported_band *sband; 302 303 sband = local->hw.wiphy->bands[info->band]; 304 legacy_rate = 305 sband->bitrates[info->status.rates[0].idx].bitrate; 306 } 307 308 if (legacy_rate) { 309 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE)); 310 *pos = DIV_ROUND_UP(legacy_rate, 5); 311 /* padding for tx flags */ 312 pos += 2; 313 } 314 315 /* IEEE80211_RADIOTAP_TX_FLAGS */ 316 txflags = 0; 317 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 318 !is_multicast_ether_addr(hdr->addr1)) 319 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; 320 321 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 322 txflags |= IEEE80211_RADIOTAP_F_TX_CTS; 323 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) 324 txflags |= IEEE80211_RADIOTAP_F_TX_RTS; 325 326 put_unaligned_le16(txflags, pos); 327 pos += 2; 328 329 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 330 /* for now report the total retry_count */ 331 *pos = retry_count; 332 pos++; 333 334 if (status_rate && (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS)) 335 { 336 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); 337 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 338 IEEE80211_RADIOTAP_MCS_HAVE_GI | 339 IEEE80211_RADIOTAP_MCS_HAVE_BW; 340 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI) 341 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 342 if (status_rate->rate_idx.bw == RATE_INFO_BW_40) 343 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 344 pos[2] = status_rate->rate_idx.mcs; 345 pos += 3; 346 } else if (status_rate && (status_rate->rate_idx.flags & 347 RATE_INFO_FLAGS_VHT_MCS)) 348 { 349 u16 known = local->hw.radiotap_vht_details & 350 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 351 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 352 353 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); 354 355 /* required alignment from rthdr */ 356 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 357 358 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 359 put_unaligned_le16(known, pos); 360 pos += 2; 361 362 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 363 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI) 364 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 365 pos++; 366 367 /* u8 bandwidth */ 368 switch (status_rate->rate_idx.bw) { 369 case RATE_INFO_BW_160: 370 *pos = 11; 371 break; 372 case RATE_INFO_BW_80: 373 *pos = 4; 374 break; 375 case RATE_INFO_BW_40: 376 *pos = 1; 377 break; 378 default: 379 *pos = 0; 380 break; 381 } 382 pos++; 383 384 /* u8 mcs_nss[4] */ 385 *pos = (status_rate->rate_idx.mcs << 4) | 386 status_rate->rate_idx.nss; 387 pos += 4; 388 389 /* u8 coding */ 390 pos++; 391 /* u8 group_id */ 392 pos++; 393 /* u16 partial_aid */ 394 pos += 2; 395 } else if (status_rate && (status_rate->rate_idx.flags & 396 RATE_INFO_FLAGS_HE_MCS)) 397 { 398 struct ieee80211_radiotap_he *he; 399 400 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE)); 401 402 /* required alignment from rthdr */ 403 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 404 he = (struct ieee80211_radiotap_he *)pos; 405 406 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU | 407 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 408 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 409 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 410 411 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN); 412 413 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f) 414 415 he->data6 |= HE_PREP(DATA6_NSTS, status_rate->rate_idx.nss); 416 417 #define CHECK_GI(s) \ 418 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \ 419 (int)NL80211_RATE_INFO_HE_GI_##s) 420 421 CHECK_GI(0_8); 422 CHECK_GI(1_6); 423 CHECK_GI(3_2); 424 425 he->data3 |= HE_PREP(DATA3_DATA_MCS, status_rate->rate_idx.mcs); 426 he->data3 |= HE_PREP(DATA3_DATA_DCM, status_rate->rate_idx.he_dcm); 427 428 he->data5 |= HE_PREP(DATA5_GI, status_rate->rate_idx.he_gi); 429 430 switch (status_rate->rate_idx.bw) { 431 case RATE_INFO_BW_20: 432 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 433 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ); 434 break; 435 case RATE_INFO_BW_40: 436 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 437 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ); 438 break; 439 case RATE_INFO_BW_80: 440 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 441 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ); 442 break; 443 case RATE_INFO_BW_160: 444 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 445 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ); 446 break; 447 case RATE_INFO_BW_HE_RU: 448 #define CHECK_RU_ALLOC(s) \ 449 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \ 450 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4) 451 452 CHECK_RU_ALLOC(26); 453 CHECK_RU_ALLOC(52); 454 CHECK_RU_ALLOC(106); 455 CHECK_RU_ALLOC(242); 456 CHECK_RU_ALLOC(484); 457 CHECK_RU_ALLOC(996); 458 CHECK_RU_ALLOC(2x996); 459 460 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 461 status_rate->rate_idx.he_ru_alloc + 4); 462 break; 463 default: 464 WARN_ONCE(1, "Invalid SU BW %d\n", status_rate->rate_idx.bw); 465 } 466 467 pos += sizeof(struct ieee80211_radiotap_he); 468 } 469 470 if (status_rate || info->status.rates[0].idx < 0) 471 return; 472 473 /* IEEE80211_RADIOTAP_MCS 474 * IEEE80211_RADIOTAP_VHT */ 475 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { 476 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); 477 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 478 IEEE80211_RADIOTAP_MCS_HAVE_GI | 479 IEEE80211_RADIOTAP_MCS_HAVE_BW; 480 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 481 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 482 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 483 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 484 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) 485 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; 486 pos[2] = info->status.rates[0].idx; 487 pos += 3; 488 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { 489 u16 known = local->hw.radiotap_vht_details & 490 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 491 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 492 493 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); 494 495 /* required alignment from rthdr */ 496 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 497 498 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 499 put_unaligned_le16(known, pos); 500 pos += 2; 501 502 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 503 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 504 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 505 pos++; 506 507 /* u8 bandwidth */ 508 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 509 *pos = 1; 510 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 511 *pos = 4; 512 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 513 *pos = 11; 514 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ 515 *pos = 0; 516 pos++; 517 518 /* u8 mcs_nss[4] */ 519 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | 520 ieee80211_rate_get_vht_nss(&info->status.rates[0]); 521 pos += 4; 522 523 /* u8 coding */ 524 pos++; 525 /* u8 group_id */ 526 pos++; 527 /* u16 partial_aid */ 528 pos += 2; 529 } 530 } 531 532 /* 533 * Handles the tx for TDLS teardown frames. 534 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP 535 */ 536 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, 537 struct ieee80211_sub_if_data *sdata, 538 struct sk_buff *skb, u32 flags) 539 { 540 struct sk_buff *teardown_skb; 541 struct sk_buff *orig_teardown_skb; 542 bool is_teardown = false; 543 544 /* Get the teardown data we need and free the lock */ 545 spin_lock(&sdata->u.mgd.teardown_lock); 546 teardown_skb = sdata->u.mgd.teardown_skb; 547 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; 548 if ((skb == orig_teardown_skb) && teardown_skb) { 549 sdata->u.mgd.teardown_skb = NULL; 550 sdata->u.mgd.orig_teardown_skb = NULL; 551 is_teardown = true; 552 } 553 spin_unlock(&sdata->u.mgd.teardown_lock); 554 555 if (is_teardown) { 556 /* This mechanism relies on being able to get ACKs */ 557 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); 558 559 /* Check if peer has ACKed */ 560 if (flags & IEEE80211_TX_STAT_ACK) { 561 dev_kfree_skb_any(teardown_skb); 562 } else { 563 tdls_dbg(sdata, 564 "TDLS Resending teardown through AP\n"); 565 566 ieee80211_subif_start_xmit(teardown_skb, skb->dev); 567 } 568 } 569 } 570 571 static struct ieee80211_sub_if_data * 572 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) 573 { 574 struct ieee80211_sub_if_data *sdata; 575 576 if (skb->dev) { 577 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 578 if (!sdata->dev) 579 continue; 580 581 if (skb->dev == sdata->dev) 582 return sdata; 583 } 584 585 return NULL; 586 } 587 588 return rcu_dereference(local->p2p_sdata); 589 } 590 591 static void ieee80211_report_ack_skb(struct ieee80211_local *local, 592 struct sk_buff *orig_skb, 593 bool acked, bool dropped, 594 ktime_t ack_hwtstamp) 595 { 596 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(orig_skb); 597 struct sk_buff *skb; 598 unsigned long flags; 599 600 spin_lock_irqsave(&local->ack_status_lock, flags); 601 skb = idr_remove(&local->ack_status_frames, info->status_data); 602 spin_unlock_irqrestore(&local->ack_status_lock, flags); 603 604 if (!skb) 605 return; 606 607 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { 608 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; 609 struct ieee80211_sub_if_data *sdata; 610 struct ieee80211_hdr *hdr = (void *)skb->data; 611 bool is_valid_ack_signal = 612 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 613 struct cfg80211_tx_status status = { 614 .cookie = cookie, 615 .buf = skb->data, 616 .len = skb->len, 617 .ack = acked, 618 }; 619 620 if (ieee80211_is_timing_measurement(orig_skb) || 621 ieee80211_is_ftm(orig_skb)) { 622 status.tx_tstamp = 623 ktime_to_ns(skb_hwtstamps(orig_skb)->hwtstamp); 624 status.ack_tstamp = ktime_to_ns(ack_hwtstamp); 625 } 626 627 rcu_read_lock(); 628 sdata = ieee80211_sdata_from_skb(local, skb); 629 if (sdata) { 630 if (skb->protocol == sdata->control_port_protocol || 631 skb->protocol == cpu_to_be16(ETH_P_PREAUTH)) 632 cfg80211_control_port_tx_status(&sdata->wdev, 633 cookie, 634 skb->data, 635 skb->len, 636 acked, 637 GFP_ATOMIC); 638 else if (ieee80211_is_any_nullfunc(hdr->frame_control)) 639 cfg80211_probe_status(sdata->dev, hdr->addr1, 640 cookie, acked, 641 info->status.ack_signal, 642 is_valid_ack_signal, 643 GFP_ATOMIC); 644 else if (ieee80211_is_mgmt(hdr->frame_control)) 645 cfg80211_mgmt_tx_status_ext(&sdata->wdev, 646 &status, 647 GFP_ATOMIC); 648 else 649 pr_warn("Unknown status report in ack skb\n"); 650 651 } 652 rcu_read_unlock(); 653 654 dev_kfree_skb_any(skb); 655 } else if (dropped) { 656 dev_kfree_skb_any(skb); 657 } else { 658 /* consumes skb */ 659 skb_complete_wifi_ack(skb, acked); 660 } 661 } 662 663 static void ieee80211_handle_smps_status(struct ieee80211_sub_if_data *sdata, 664 bool acked, u16 status_data) 665 { 666 u16 sub_data = u16_get_bits(status_data, IEEE80211_STATUS_SUBDATA_MASK); 667 enum ieee80211_smps_mode smps_mode = sub_data & 3; 668 int link_id = (sub_data >> 2); 669 struct ieee80211_link_data *link; 670 671 if (!sdata || !ieee80211_sdata_running(sdata)) 672 return; 673 674 if (!acked) 675 return; 676 677 if (sdata->vif.type != NL80211_IFTYPE_STATION) 678 return; 679 680 if (WARN(link_id >= ARRAY_SIZE(sdata->link), 681 "bad SMPS status link: %d\n", link_id)) 682 return; 683 684 link = rcu_dereference(sdata->link[link_id]); 685 if (!link) 686 return; 687 688 /* 689 * This update looks racy, but isn't, the only other place 690 * updating this variable is in managed mode before assoc, 691 * and we have to be associated to have a status from the 692 * action frame TX, since we cannot send it while we're not 693 * associated yet. 694 */ 695 link->smps_mode = smps_mode; 696 wiphy_work_queue(sdata->local->hw.wiphy, &link->u.mgd.recalc_smps); 697 } 698 699 static void ieee80211_report_used_skb(struct ieee80211_local *local, 700 struct sk_buff *skb, bool dropped, 701 ktime_t ack_hwtstamp) 702 { 703 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 704 u16 tx_time_est = ieee80211_info_get_tx_time_est(info); 705 struct ieee80211_hdr *hdr = (void *)skb->data; 706 bool acked = info->flags & IEEE80211_TX_STAT_ACK; 707 708 if (dropped) 709 acked = false; 710 711 if (tx_time_est) { 712 struct sta_info *sta; 713 714 rcu_read_lock(); 715 716 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 717 ieee80211_sta_update_pending_airtime(local, sta, 718 skb_get_queue_mapping(skb), 719 tx_time_est, 720 true); 721 rcu_read_unlock(); 722 } 723 724 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { 725 struct ieee80211_sub_if_data *sdata; 726 727 rcu_read_lock(); 728 729 sdata = ieee80211_sdata_from_skb(local, skb); 730 731 if (!sdata) { 732 skb->dev = NULL; 733 } else if (!dropped) { 734 /* Check to see if packet is a TDLS teardown packet */ 735 if (ieee80211_is_data(hdr->frame_control) && 736 (ieee80211_get_tdls_action(skb) == 737 WLAN_TDLS_TEARDOWN)) { 738 ieee80211_tdls_td_tx_handle(local, sdata, skb, 739 info->flags); 740 } else if (ieee80211_s1g_is_twt_setup(skb)) { 741 if (!acked) { 742 struct sk_buff *qskb; 743 744 qskb = skb_clone(skb, GFP_ATOMIC); 745 if (qskb) { 746 skb_queue_tail(&sdata->status_queue, 747 qskb); 748 wiphy_work_queue(local->hw.wiphy, 749 &sdata->work); 750 } 751 } 752 } else { 753 ieee80211_mgd_conn_tx_status(sdata, 754 hdr->frame_control, 755 acked); 756 } 757 } 758 759 rcu_read_unlock(); 760 } else if (info->status_data_idr) { 761 ieee80211_report_ack_skb(local, skb, acked, dropped, 762 ack_hwtstamp); 763 } else if (info->status_data) { 764 struct ieee80211_sub_if_data *sdata; 765 766 rcu_read_lock(); 767 768 sdata = ieee80211_sdata_from_skb(local, skb); 769 770 switch (u16_get_bits(info->status_data, 771 IEEE80211_STATUS_TYPE_MASK)) { 772 case IEEE80211_STATUS_TYPE_SMPS: 773 ieee80211_handle_smps_status(sdata, acked, 774 info->status_data); 775 break; 776 } 777 rcu_read_unlock(); 778 } 779 780 if (!dropped && skb->destructor) { 781 skb->wifi_acked_valid = 1; 782 skb->wifi_acked = acked; 783 } 784 785 ieee80211_led_tx(local); 786 787 if (skb_has_frag_list(skb)) { 788 kfree_skb_list(skb_shinfo(skb)->frag_list); 789 skb_shinfo(skb)->frag_list = NULL; 790 } 791 } 792 793 /* 794 * Use a static threshold for now, best value to be determined 795 * by testing ... 796 * Should it depend on: 797 * - on # of retransmissions 798 * - current throughput (higher value for higher tpt)? 799 */ 800 #define STA_LOST_PKT_THRESHOLD 50 801 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */ 802 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ 803 804 static void ieee80211_lost_packet(struct sta_info *sta, 805 struct ieee80211_tx_info *info) 806 { 807 unsigned long pkt_time = STA_LOST_PKT_TIME; 808 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD; 809 810 /* If driver relies on its own algorithm for station kickout, skip 811 * mac80211 packet loss mechanism. 812 */ 813 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) 814 return; 815 816 /* This packet was aggregated but doesn't carry status info */ 817 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 818 !(info->flags & IEEE80211_TX_STAT_AMPDU)) 819 return; 820 821 sta->deflink.status_stats.lost_packets++; 822 if (sta->sta.tdls) { 823 pkt_time = STA_LOST_TDLS_PKT_TIME; 824 pkt_thr = STA_LOST_PKT_THRESHOLD; 825 } 826 827 /* 828 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD 829 * of the last packets were lost, and that no ACK was received in the 830 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss 831 * mechanism. 832 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME 833 */ 834 if (sta->deflink.status_stats.lost_packets < pkt_thr || 835 !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time)) 836 return; 837 838 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 839 sta->deflink.status_stats.lost_packets, 840 GFP_ATOMIC); 841 sta->deflink.status_stats.lost_packets = 0; 842 } 843 844 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 845 struct ieee80211_tx_info *info, 846 int *retry_count) 847 { 848 int count = -1; 849 int i; 850 851 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 852 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 853 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 854 /* just the first aggr frame carry status info */ 855 info->status.rates[i].idx = -1; 856 info->status.rates[i].count = 0; 857 break; 858 } else if (info->status.rates[i].idx < 0) { 859 break; 860 } else if (i >= hw->max_report_rates) { 861 /* the HW cannot have attempted that rate */ 862 info->status.rates[i].idx = -1; 863 info->status.rates[i].count = 0; 864 break; 865 } 866 867 count += info->status.rates[i].count; 868 } 869 870 if (count < 0) 871 count = 0; 872 873 *retry_count = count; 874 return i - 1; 875 } 876 877 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 878 int retry_count, bool send_to_cooked, 879 struct ieee80211_tx_status *status) 880 { 881 struct sk_buff *skb2; 882 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 883 struct ieee80211_sub_if_data *sdata; 884 struct net_device *prev_dev = NULL; 885 int rtap_len; 886 887 /* send frame to monitor interfaces now */ 888 rtap_len = ieee80211_tx_radiotap_len(info, status); 889 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 890 pr_err("ieee80211_tx_status: headroom too small\n"); 891 dev_kfree_skb(skb); 892 return; 893 } 894 ieee80211_add_tx_radiotap_header(local, skb, retry_count, 895 rtap_len, status); 896 897 /* XXX: is this sufficient for BPF? */ 898 skb_reset_mac_header(skb); 899 skb->ip_summed = CHECKSUM_UNNECESSARY; 900 skb->pkt_type = PACKET_OTHERHOST; 901 skb->protocol = htons(ETH_P_802_2); 902 memset(skb->cb, 0, sizeof(skb->cb)); 903 904 rcu_read_lock(); 905 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 906 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 907 if (!ieee80211_sdata_running(sdata)) 908 continue; 909 910 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && 911 !send_to_cooked) 912 continue; 913 914 if (prev_dev) { 915 skb2 = skb_clone(skb, GFP_ATOMIC); 916 if (skb2) { 917 skb2->dev = prev_dev; 918 netif_rx(skb2); 919 } 920 } 921 922 prev_dev = sdata->dev; 923 } 924 } 925 if (prev_dev) { 926 skb->dev = prev_dev; 927 netif_rx(skb); 928 skb = NULL; 929 } 930 rcu_read_unlock(); 931 dev_kfree_skb(skb); 932 } 933 934 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 935 struct ieee80211_tx_status *status, 936 int rates_idx, int retry_count) 937 { 938 struct sk_buff *skb = status->skb; 939 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 940 struct ieee80211_local *local = hw_to_local(hw); 941 struct ieee80211_tx_info *info = status->info; 942 struct sta_info *sta; 943 __le16 fc; 944 bool send_to_cooked; 945 bool acked; 946 bool noack_success; 947 struct ieee80211_bar *bar; 948 int tid = IEEE80211_NUM_TIDS; 949 950 fc = hdr->frame_control; 951 952 if (status->sta) { 953 sta = container_of(status->sta, struct sta_info, sta); 954 955 if (info->flags & IEEE80211_TX_STATUS_EOSP) 956 clear_sta_flag(sta, WLAN_STA_SP); 957 958 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 959 noack_success = !!(info->flags & 960 IEEE80211_TX_STAT_NOACK_TRANSMITTED); 961 962 /* mesh Peer Service Period support */ 963 if (ieee80211_vif_is_mesh(&sta->sdata->vif) && 964 ieee80211_is_data_qos(fc)) 965 ieee80211_mpsp_trigger_process( 966 ieee80211_get_qos_ctl(hdr), sta, true, acked); 967 968 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && 969 (ieee80211_is_data(hdr->frame_control)) && 970 (rates_idx != -1)) 971 sta->deflink.tx_stats.last_rate = 972 info->status.rates[rates_idx]; 973 974 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 975 (ieee80211_is_data_qos(fc))) { 976 u16 ssn; 977 u8 *qc; 978 979 qc = ieee80211_get_qos_ctl(hdr); 980 tid = qc[0] & 0xf; 981 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 982 & IEEE80211_SCTL_SEQ); 983 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, 984 tid, ssn); 985 } else if (ieee80211_is_data_qos(fc)) { 986 u8 *qc = ieee80211_get_qos_ctl(hdr); 987 988 tid = qc[0] & 0xf; 989 } 990 991 if (!acked && ieee80211_is_back_req(fc)) { 992 u16 control; 993 994 /* 995 * BAR failed, store the last SSN and retry sending 996 * the BAR when the next unicast transmission on the 997 * same TID succeeds. 998 */ 999 bar = (struct ieee80211_bar *) skb->data; 1000 control = le16_to_cpu(bar->control); 1001 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { 1002 u16 ssn = le16_to_cpu(bar->start_seq_num); 1003 1004 tid = (control & 1005 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 1006 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 1007 1008 ieee80211_set_bar_pending(sta, tid, ssn); 1009 } 1010 } 1011 1012 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 1013 ieee80211_handle_filtered_frame(local, sta, skb); 1014 return; 1015 } else if (ieee80211_is_data_present(fc)) { 1016 if (!acked && !noack_success) 1017 sta->deflink.status_stats.msdu_failed[tid]++; 1018 1019 sta->deflink.status_stats.msdu_retries[tid] += 1020 retry_count; 1021 } 1022 1023 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) 1024 ieee80211_frame_acked(sta, skb); 1025 1026 } 1027 1028 /* SNMP counters 1029 * Fragments are passed to low-level drivers as separate skbs, so these 1030 * are actually fragments, not frames. Update frame counters only for 1031 * the first fragment of the frame. */ 1032 if ((info->flags & IEEE80211_TX_STAT_ACK) || 1033 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 1034 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 1035 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1036 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 1037 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1038 if (retry_count > 0) 1039 I802_DEBUG_INC(local->dot11RetryCount); 1040 if (retry_count > 1) 1041 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1042 } 1043 1044 /* This counter shall be incremented for an acknowledged MPDU 1045 * with an individual address in the address 1 field or an MPDU 1046 * with a multicast address in the address 1 field of type Data 1047 * or Management. */ 1048 if (!is_multicast_ether_addr(hdr->addr1) || 1049 ieee80211_is_data(fc) || 1050 ieee80211_is_mgmt(fc)) 1051 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1052 } else { 1053 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1054 I802_DEBUG_INC(local->dot11FailedCount); 1055 } 1056 1057 if (ieee80211_is_any_nullfunc(fc) && 1058 ieee80211_has_pm(fc) && 1059 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1060 !(info->flags & IEEE80211_TX_CTL_INJECTED) && 1061 local->ps_sdata && !(local->scanning)) { 1062 if (info->flags & IEEE80211_TX_STAT_ACK) 1063 local->ps_sdata->u.mgd.flags |= 1064 IEEE80211_STA_NULLFUNC_ACKED; 1065 mod_timer(&local->dynamic_ps_timer, 1066 jiffies + msecs_to_jiffies(10)); 1067 } 1068 1069 ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp); 1070 1071 /* this was a transmitted frame, but now we want to reuse it */ 1072 skb_orphan(skb); 1073 1074 /* Need to make a copy before skb->cb gets cleared */ 1075 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || 1076 !(ieee80211_is_data(fc)); 1077 1078 /* 1079 * This is a bit racy but we can avoid a lot of work 1080 * with this test... 1081 */ 1082 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { 1083 if (status->free_list) 1084 list_add_tail(&skb->list, status->free_list); 1085 else 1086 dev_kfree_skb(skb); 1087 return; 1088 } 1089 1090 /* send to monitor interfaces */ 1091 ieee80211_tx_monitor(local, skb, retry_count, 1092 send_to_cooked, status); 1093 } 1094 1095 void ieee80211_tx_status_skb(struct ieee80211_hw *hw, struct sk_buff *skb) 1096 { 1097 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1098 struct ieee80211_local *local = hw_to_local(hw); 1099 struct ieee80211_tx_status status = { 1100 .skb = skb, 1101 .info = IEEE80211_SKB_CB(skb), 1102 }; 1103 struct sta_info *sta; 1104 1105 rcu_read_lock(); 1106 1107 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 1108 if (sta) 1109 status.sta = &sta->sta; 1110 1111 ieee80211_tx_status_ext(hw, &status); 1112 rcu_read_unlock(); 1113 } 1114 EXPORT_SYMBOL(ieee80211_tx_status_skb); 1115 1116 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1117 struct ieee80211_tx_status *status) 1118 { 1119 struct ieee80211_local *local = hw_to_local(hw); 1120 struct ieee80211_tx_info *info = status->info; 1121 struct ieee80211_sta *pubsta = status->sta; 1122 struct sk_buff *skb = status->skb; 1123 struct sta_info *sta = NULL; 1124 int rates_idx, retry_count; 1125 bool acked, noack_success, ack_signal_valid; 1126 u16 tx_time_est; 1127 1128 if (pubsta) { 1129 sta = container_of(pubsta, struct sta_info, sta); 1130 1131 if (status->n_rates) 1132 sta->deflink.tx_stats.last_rate_info = 1133 status->rates[status->n_rates - 1].rate_idx; 1134 } 1135 1136 if (skb && (tx_time_est = 1137 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) { 1138 /* Do this here to avoid the expensive lookup of the sta 1139 * in ieee80211_report_used_skb(). 1140 */ 1141 ieee80211_sta_update_pending_airtime(local, sta, 1142 skb_get_queue_mapping(skb), 1143 tx_time_est, 1144 true); 1145 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0); 1146 } 1147 1148 if (!status->info) 1149 goto free; 1150 1151 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 1152 1153 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1154 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1155 ack_signal_valid = 1156 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 1157 1158 if (pubsta) { 1159 struct ieee80211_sub_if_data *sdata = sta->sdata; 1160 1161 if (!acked && !noack_success) 1162 sta->deflink.status_stats.retry_failed++; 1163 sta->deflink.status_stats.retry_count += retry_count; 1164 1165 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 1166 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1167 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1168 ieee80211_sta_tx_notify(sdata, (void *) skb->data, 1169 acked, info->status.tx_time); 1170 1171 if (acked) { 1172 sta->deflink.status_stats.last_ack = jiffies; 1173 1174 if (sta->deflink.status_stats.lost_packets) 1175 sta->deflink.status_stats.lost_packets = 0; 1176 1177 /* Track when last packet was ACKed */ 1178 sta->deflink.status_stats.last_pkt_time = jiffies; 1179 1180 /* Reset connection monitor */ 1181 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1182 unlikely(sdata->u.mgd.probe_send_count > 0)) 1183 sdata->u.mgd.probe_send_count = 0; 1184 1185 if (ack_signal_valid) { 1186 sta->deflink.status_stats.last_ack_signal = 1187 (s8)info->status.ack_signal; 1188 sta->deflink.status_stats.ack_signal_filled = true; 1189 ewma_avg_signal_add(&sta->deflink.status_stats.avg_ack_signal, 1190 -info->status.ack_signal); 1191 } 1192 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1193 /* 1194 * The STA is in power save mode, so assume 1195 * that this TX packet failed because of that. 1196 */ 1197 if (skb) 1198 ieee80211_handle_filtered_frame(local, sta, skb); 1199 return; 1200 } else if (noack_success) { 1201 /* nothing to do here, do not account as lost */ 1202 } else { 1203 ieee80211_lost_packet(sta, info); 1204 } 1205 } 1206 1207 rate_control_tx_status(local, status); 1208 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1209 ieee80211s_update_metric(local, sta, status); 1210 } 1211 1212 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1213 return __ieee80211_tx_status(hw, status, rates_idx, 1214 retry_count); 1215 1216 if (acked || noack_success) { 1217 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1218 if (!pubsta) 1219 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1220 if (retry_count > 0) 1221 I802_DEBUG_INC(local->dot11RetryCount); 1222 if (retry_count > 1) 1223 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1224 } else { 1225 I802_DEBUG_INC(local->dot11FailedCount); 1226 } 1227 1228 free: 1229 if (!skb) 1230 return; 1231 1232 ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp); 1233 if (status->free_list) 1234 list_add_tail(&skb->list, status->free_list); 1235 else 1236 dev_kfree_skb(skb); 1237 } 1238 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1239 1240 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1241 struct ieee80211_sta *pubsta, 1242 struct ieee80211_tx_info *info) 1243 { 1244 struct ieee80211_local *local = hw_to_local(hw); 1245 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1246 struct ieee80211_tx_status status = { 1247 .info = info, 1248 .sta = pubsta, 1249 }; 1250 1251 rate_control_tx_status(local, &status); 1252 1253 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1254 sta->deflink.tx_stats.last_rate = info->status.rates[0]; 1255 } 1256 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1257 1258 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1259 { 1260 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1261 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1262 num_packets, GFP_ATOMIC); 1263 } 1264 EXPORT_SYMBOL(ieee80211_report_low_ack); 1265 1266 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1267 { 1268 struct ieee80211_local *local = hw_to_local(hw); 1269 ktime_t kt = ktime_set(0, 0); 1270 1271 ieee80211_report_used_skb(local, skb, true, kt); 1272 dev_kfree_skb_any(skb); 1273 } 1274 EXPORT_SYMBOL(ieee80211_free_txskb); 1275 1276 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1277 struct sk_buff_head *skbs) 1278 { 1279 struct sk_buff *skb; 1280 1281 while ((skb = __skb_dequeue(skbs))) 1282 ieee80211_free_txskb(hw, skb); 1283 } 1284