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 2021-2022 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 struct ieee80211_local *local = sta->local; 188 struct ieee80211_sub_if_data *sdata = sta->sdata; 189 190 if (ieee80211_is_data_qos(mgmt->frame_control)) { 191 struct ieee80211_hdr *hdr = (void *) skb->data; 192 u8 *qc = ieee80211_get_qos_ctl(hdr); 193 u16 tid = qc[0] & 0xf; 194 195 ieee80211_check_pending_bar(sta, hdr->addr1, tid); 196 } 197 198 if (ieee80211_is_action(mgmt->frame_control) && 199 !ieee80211_has_protected(mgmt->frame_control) && 200 mgmt->u.action.category == WLAN_CATEGORY_HT && 201 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && 202 ieee80211_sdata_running(sdata)) { 203 enum ieee80211_smps_mode smps_mode; 204 205 switch (mgmt->u.action.u.ht_smps.smps_control) { 206 case WLAN_HT_SMPS_CONTROL_DYNAMIC: 207 smps_mode = IEEE80211_SMPS_DYNAMIC; 208 break; 209 case WLAN_HT_SMPS_CONTROL_STATIC: 210 smps_mode = IEEE80211_SMPS_STATIC; 211 break; 212 case WLAN_HT_SMPS_CONTROL_DISABLED: 213 default: /* shouldn't happen since we don't send that */ 214 smps_mode = IEEE80211_SMPS_OFF; 215 break; 216 } 217 218 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 219 /* 220 * This update looks racy, but isn't -- if we come 221 * here we've definitely got a station that we're 222 * talking to, and on a managed interface that can 223 * only be the AP. And the only other place updating 224 * this variable in managed mode is before association. 225 */ 226 sdata->deflink.smps_mode = smps_mode; 227 ieee80211_queue_work(&local->hw, &sdata->recalc_smps); 228 } 229 } 230 } 231 232 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) 233 { 234 struct tid_ampdu_tx *tid_tx; 235 236 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 237 if (!tid_tx) 238 return; 239 240 tid_tx->failed_bar_ssn = ssn; 241 tid_tx->bar_pending = true; 242 } 243 244 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info, 245 struct ieee80211_tx_status *status) 246 { 247 struct ieee80211_rate_status *status_rate = NULL; 248 int len = sizeof(struct ieee80211_radiotap_header); 249 250 if (status && status->n_rates) 251 status_rate = &status->rates[status->n_rates - 1]; 252 253 /* IEEE80211_RADIOTAP_RATE rate */ 254 if (status_rate && !(status_rate->rate_idx.flags & 255 (RATE_INFO_FLAGS_MCS | 256 RATE_INFO_FLAGS_DMG | 257 RATE_INFO_FLAGS_EDMG | 258 RATE_INFO_FLAGS_VHT_MCS | 259 RATE_INFO_FLAGS_HE_MCS))) 260 len += 2; 261 else if (info->status.rates[0].idx >= 0 && 262 !(info->status.rates[0].flags & 263 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))) 264 len += 2; 265 266 /* IEEE80211_RADIOTAP_TX_FLAGS */ 267 len += 2; 268 269 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 270 len += 1; 271 272 /* IEEE80211_RADIOTAP_MCS 273 * IEEE80211_RADIOTAP_VHT */ 274 if (status_rate) { 275 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS) 276 len += 3; 277 else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_VHT_MCS) 278 len = ALIGN(len, 2) + 12; 279 else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_HE_MCS) 280 len = ALIGN(len, 2) + 12; 281 } else if (info->status.rates[0].idx >= 0) { 282 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) 283 len += 3; 284 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) 285 len = ALIGN(len, 2) + 12; 286 } 287 288 return len; 289 } 290 291 static void 292 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, 293 struct sk_buff *skb, int retry_count, 294 int rtap_len, int shift, 295 struct ieee80211_tx_status *status) 296 { 297 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 298 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 299 struct ieee80211_radiotap_header *rthdr; 300 struct ieee80211_rate_status *status_rate = NULL; 301 unsigned char *pos; 302 u16 legacy_rate = 0; 303 u16 txflags; 304 305 if (status && status->n_rates) 306 status_rate = &status->rates[status->n_rates - 1]; 307 308 rthdr = skb_push(skb, rtap_len); 309 310 memset(rthdr, 0, rtap_len); 311 rthdr->it_len = cpu_to_le16(rtap_len); 312 rthdr->it_present = 313 cpu_to_le32(BIT(IEEE80211_RADIOTAP_TX_FLAGS) | 314 BIT(IEEE80211_RADIOTAP_DATA_RETRIES)); 315 pos = (unsigned char *)(rthdr + 1); 316 317 /* 318 * XXX: Once radiotap gets the bitmap reset thing the vendor 319 * extensions proposal contains, we can actually report 320 * the whole set of tries we did. 321 */ 322 323 /* IEEE80211_RADIOTAP_RATE */ 324 325 if (status_rate) { 326 if (!(status_rate->rate_idx.flags & 327 (RATE_INFO_FLAGS_MCS | 328 RATE_INFO_FLAGS_DMG | 329 RATE_INFO_FLAGS_EDMG | 330 RATE_INFO_FLAGS_VHT_MCS | 331 RATE_INFO_FLAGS_HE_MCS))) 332 legacy_rate = status_rate->rate_idx.legacy; 333 } else if (info->status.rates[0].idx >= 0 && 334 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | 335 IEEE80211_TX_RC_VHT_MCS))) { 336 struct ieee80211_supported_band *sband; 337 338 sband = local->hw.wiphy->bands[info->band]; 339 legacy_rate = 340 sband->bitrates[info->status.rates[0].idx].bitrate; 341 } 342 343 if (legacy_rate) { 344 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE)); 345 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift)); 346 /* padding for tx flags */ 347 pos += 2; 348 } 349 350 /* IEEE80211_RADIOTAP_TX_FLAGS */ 351 txflags = 0; 352 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 353 !is_multicast_ether_addr(hdr->addr1)) 354 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; 355 356 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 357 txflags |= IEEE80211_RADIOTAP_F_TX_CTS; 358 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) 359 txflags |= IEEE80211_RADIOTAP_F_TX_RTS; 360 361 put_unaligned_le16(txflags, pos); 362 pos += 2; 363 364 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 365 /* for now report the total retry_count */ 366 *pos = retry_count; 367 pos++; 368 369 if (status_rate && (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS)) 370 { 371 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); 372 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 373 IEEE80211_RADIOTAP_MCS_HAVE_GI | 374 IEEE80211_RADIOTAP_MCS_HAVE_BW; 375 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI) 376 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 377 if (status_rate->rate_idx.bw == RATE_INFO_BW_40) 378 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 379 pos[2] = status_rate->rate_idx.mcs; 380 pos += 3; 381 } else if (status_rate && (status_rate->rate_idx.flags & 382 RATE_INFO_FLAGS_VHT_MCS)) 383 { 384 u16 known = local->hw.radiotap_vht_details & 385 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 386 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 387 388 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); 389 390 /* required alignment from rthdr */ 391 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 392 393 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 394 put_unaligned_le16(known, pos); 395 pos += 2; 396 397 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 398 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI) 399 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 400 pos++; 401 402 /* u8 bandwidth */ 403 switch (status_rate->rate_idx.bw) { 404 case RATE_INFO_BW_160: 405 *pos = 11; 406 break; 407 case RATE_INFO_BW_80: 408 *pos = 4; 409 break; 410 case RATE_INFO_BW_40: 411 *pos = 1; 412 break; 413 default: 414 *pos = 0; 415 break; 416 } 417 pos++; 418 419 /* u8 mcs_nss[4] */ 420 *pos = (status_rate->rate_idx.mcs << 4) | 421 status_rate->rate_idx.nss; 422 pos += 4; 423 424 /* u8 coding */ 425 pos++; 426 /* u8 group_id */ 427 pos++; 428 /* u16 partial_aid */ 429 pos += 2; 430 } else if (status_rate && (status_rate->rate_idx.flags & 431 RATE_INFO_FLAGS_HE_MCS)) 432 { 433 struct ieee80211_radiotap_he *he; 434 435 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE)); 436 437 /* required alignment from rthdr */ 438 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 439 he = (struct ieee80211_radiotap_he *)pos; 440 441 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU | 442 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 443 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 444 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 445 446 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN); 447 448 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f) 449 450 he->data6 |= HE_PREP(DATA6_NSTS, status_rate->rate_idx.nss); 451 452 #define CHECK_GI(s) \ 453 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \ 454 (int)NL80211_RATE_INFO_HE_GI_##s) 455 456 CHECK_GI(0_8); 457 CHECK_GI(1_6); 458 CHECK_GI(3_2); 459 460 he->data3 |= HE_PREP(DATA3_DATA_MCS, status_rate->rate_idx.mcs); 461 he->data3 |= HE_PREP(DATA3_DATA_DCM, status_rate->rate_idx.he_dcm); 462 463 he->data5 |= HE_PREP(DATA5_GI, status_rate->rate_idx.he_gi); 464 465 switch (status_rate->rate_idx.bw) { 466 case RATE_INFO_BW_20: 467 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 468 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ); 469 break; 470 case RATE_INFO_BW_40: 471 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 472 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ); 473 break; 474 case RATE_INFO_BW_80: 475 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 476 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ); 477 break; 478 case RATE_INFO_BW_160: 479 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 480 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ); 481 break; 482 case RATE_INFO_BW_HE_RU: 483 #define CHECK_RU_ALLOC(s) \ 484 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \ 485 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4) 486 487 CHECK_RU_ALLOC(26); 488 CHECK_RU_ALLOC(52); 489 CHECK_RU_ALLOC(106); 490 CHECK_RU_ALLOC(242); 491 CHECK_RU_ALLOC(484); 492 CHECK_RU_ALLOC(996); 493 CHECK_RU_ALLOC(2x996); 494 495 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 496 status_rate->rate_idx.he_ru_alloc + 4); 497 break; 498 default: 499 WARN_ONCE(1, "Invalid SU BW %d\n", status_rate->rate_idx.bw); 500 } 501 502 pos += sizeof(struct ieee80211_radiotap_he); 503 } 504 505 if (status_rate || info->status.rates[0].idx < 0) 506 return; 507 508 /* IEEE80211_RADIOTAP_MCS 509 * IEEE80211_RADIOTAP_VHT */ 510 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { 511 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); 512 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 513 IEEE80211_RADIOTAP_MCS_HAVE_GI | 514 IEEE80211_RADIOTAP_MCS_HAVE_BW; 515 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 516 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 517 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 518 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 519 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) 520 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; 521 pos[2] = info->status.rates[0].idx; 522 pos += 3; 523 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { 524 u16 known = local->hw.radiotap_vht_details & 525 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 526 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 527 528 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); 529 530 /* required alignment from rthdr */ 531 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 532 533 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 534 put_unaligned_le16(known, pos); 535 pos += 2; 536 537 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 538 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 539 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 540 pos++; 541 542 /* u8 bandwidth */ 543 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 544 *pos = 1; 545 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 546 *pos = 4; 547 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 548 *pos = 11; 549 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ 550 *pos = 0; 551 pos++; 552 553 /* u8 mcs_nss[4] */ 554 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | 555 ieee80211_rate_get_vht_nss(&info->status.rates[0]); 556 pos += 4; 557 558 /* u8 coding */ 559 pos++; 560 /* u8 group_id */ 561 pos++; 562 /* u16 partial_aid */ 563 pos += 2; 564 } 565 } 566 567 /* 568 * Handles the tx for TDLS teardown frames. 569 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP 570 */ 571 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, 572 struct ieee80211_sub_if_data *sdata, 573 struct sk_buff *skb, u32 flags) 574 { 575 struct sk_buff *teardown_skb; 576 struct sk_buff *orig_teardown_skb; 577 bool is_teardown = false; 578 579 /* Get the teardown data we need and free the lock */ 580 spin_lock(&sdata->u.mgd.teardown_lock); 581 teardown_skb = sdata->u.mgd.teardown_skb; 582 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; 583 if ((skb == orig_teardown_skb) && teardown_skb) { 584 sdata->u.mgd.teardown_skb = NULL; 585 sdata->u.mgd.orig_teardown_skb = NULL; 586 is_teardown = true; 587 } 588 spin_unlock(&sdata->u.mgd.teardown_lock); 589 590 if (is_teardown) { 591 /* This mechanism relies on being able to get ACKs */ 592 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); 593 594 /* Check if peer has ACKed */ 595 if (flags & IEEE80211_TX_STAT_ACK) { 596 dev_kfree_skb_any(teardown_skb); 597 } else { 598 tdls_dbg(sdata, 599 "TDLS Resending teardown through AP\n"); 600 601 ieee80211_subif_start_xmit(teardown_skb, skb->dev); 602 } 603 } 604 } 605 606 static struct ieee80211_sub_if_data * 607 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) 608 { 609 struct ieee80211_sub_if_data *sdata; 610 611 if (skb->dev) { 612 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 613 if (!sdata->dev) 614 continue; 615 616 if (skb->dev == sdata->dev) 617 return sdata; 618 } 619 620 return NULL; 621 } 622 623 return rcu_dereference(local->p2p_sdata); 624 } 625 626 static void ieee80211_report_ack_skb(struct ieee80211_local *local, 627 struct sk_buff *orig_skb, 628 bool acked, bool dropped, 629 ktime_t ack_hwtstamp) 630 { 631 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(orig_skb); 632 struct sk_buff *skb; 633 unsigned long flags; 634 635 spin_lock_irqsave(&local->ack_status_lock, flags); 636 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id); 637 spin_unlock_irqrestore(&local->ack_status_lock, flags); 638 639 if (!skb) 640 return; 641 642 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { 643 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; 644 struct ieee80211_sub_if_data *sdata; 645 struct ieee80211_hdr *hdr = (void *)skb->data; 646 bool is_valid_ack_signal = 647 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 648 struct cfg80211_tx_status status = { 649 .cookie = cookie, 650 .buf = skb->data, 651 .len = skb->len, 652 .ack = acked, 653 }; 654 655 if (ieee80211_is_timing_measurement(orig_skb) || 656 ieee80211_is_ftm(orig_skb)) { 657 status.tx_tstamp = 658 ktime_to_ns(skb_hwtstamps(orig_skb)->hwtstamp); 659 status.ack_tstamp = ktime_to_ns(ack_hwtstamp); 660 } 661 662 rcu_read_lock(); 663 sdata = ieee80211_sdata_from_skb(local, skb); 664 if (sdata) { 665 if (skb->protocol == sdata->control_port_protocol || 666 skb->protocol == cpu_to_be16(ETH_P_PREAUTH)) 667 cfg80211_control_port_tx_status(&sdata->wdev, 668 cookie, 669 skb->data, 670 skb->len, 671 acked, 672 GFP_ATOMIC); 673 else if (ieee80211_is_any_nullfunc(hdr->frame_control)) 674 cfg80211_probe_status(sdata->dev, hdr->addr1, 675 cookie, acked, 676 info->status.ack_signal, 677 is_valid_ack_signal, 678 GFP_ATOMIC); 679 else if (ieee80211_is_mgmt(hdr->frame_control)) 680 cfg80211_mgmt_tx_status_ext(&sdata->wdev, 681 &status, 682 GFP_ATOMIC); 683 else 684 pr_warn("Unknown status report in ack skb\n"); 685 686 } 687 rcu_read_unlock(); 688 689 dev_kfree_skb_any(skb); 690 } else if (dropped) { 691 dev_kfree_skb_any(skb); 692 } else { 693 /* consumes skb */ 694 skb_complete_wifi_ack(skb, acked); 695 } 696 } 697 698 static void ieee80211_report_used_skb(struct ieee80211_local *local, 699 struct sk_buff *skb, bool dropped, 700 ktime_t ack_hwtstamp) 701 { 702 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 703 u16 tx_time_est = ieee80211_info_get_tx_time_est(info); 704 struct ieee80211_hdr *hdr = (void *)skb->data; 705 bool acked = info->flags & IEEE80211_TX_STAT_ACK; 706 707 if (dropped) 708 acked = false; 709 710 if (tx_time_est) { 711 struct sta_info *sta; 712 713 rcu_read_lock(); 714 715 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 716 ieee80211_sta_update_pending_airtime(local, sta, 717 skb_get_queue_mapping(skb), 718 tx_time_est, 719 true); 720 rcu_read_unlock(); 721 } 722 723 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { 724 struct ieee80211_sub_if_data *sdata; 725 726 rcu_read_lock(); 727 728 sdata = ieee80211_sdata_from_skb(local, skb); 729 730 if (!sdata) { 731 skb->dev = NULL; 732 } else if (!dropped) { 733 unsigned int hdr_size = 734 ieee80211_hdrlen(hdr->frame_control); 735 736 /* Check to see if packet is a TDLS teardown packet */ 737 if (ieee80211_is_data(hdr->frame_control) && 738 (ieee80211_get_tdls_action(skb, hdr_size) == 739 WLAN_TDLS_TEARDOWN)) { 740 ieee80211_tdls_td_tx_handle(local, sdata, skb, 741 info->flags); 742 } else if (ieee80211_s1g_is_twt_setup(skb)) { 743 if (!acked) { 744 struct sk_buff *qskb; 745 746 qskb = skb_clone(skb, GFP_ATOMIC); 747 if (qskb) { 748 skb_queue_tail(&sdata->status_queue, 749 qskb); 750 ieee80211_queue_work(&local->hw, 751 &sdata->work); 752 } 753 } 754 } else { 755 ieee80211_mgd_conn_tx_status(sdata, 756 hdr->frame_control, 757 acked); 758 } 759 } 760 761 rcu_read_unlock(); 762 } else if (info->ack_frame_id) { 763 ieee80211_report_ack_skb(local, skb, acked, dropped, 764 ack_hwtstamp); 765 } 766 767 if (!dropped && skb->destructor) { 768 skb->wifi_acked_valid = 1; 769 skb->wifi_acked = acked; 770 } 771 772 ieee80211_led_tx(local); 773 774 if (skb_has_frag_list(skb)) { 775 kfree_skb_list(skb_shinfo(skb)->frag_list); 776 skb_shinfo(skb)->frag_list = NULL; 777 } 778 } 779 780 /* 781 * Use a static threshold for now, best value to be determined 782 * by testing ... 783 * Should it depend on: 784 * - on # of retransmissions 785 * - current throughput (higher value for higher tpt)? 786 */ 787 #define STA_LOST_PKT_THRESHOLD 50 788 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */ 789 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ 790 791 static void ieee80211_lost_packet(struct sta_info *sta, 792 struct ieee80211_tx_info *info) 793 { 794 unsigned long pkt_time = STA_LOST_PKT_TIME; 795 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD; 796 797 /* If driver relies on its own algorithm for station kickout, skip 798 * mac80211 packet loss mechanism. 799 */ 800 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) 801 return; 802 803 /* This packet was aggregated but doesn't carry status info */ 804 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 805 !(info->flags & IEEE80211_TX_STAT_AMPDU)) 806 return; 807 808 sta->deflink.status_stats.lost_packets++; 809 if (sta->sta.tdls) { 810 pkt_time = STA_LOST_TDLS_PKT_TIME; 811 pkt_thr = STA_LOST_PKT_THRESHOLD; 812 } 813 814 /* 815 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD 816 * of the last packets were lost, and that no ACK was received in the 817 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss 818 * mechanism. 819 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME 820 */ 821 if (sta->deflink.status_stats.lost_packets < pkt_thr || 822 !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time)) 823 return; 824 825 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 826 sta->deflink.status_stats.lost_packets, 827 GFP_ATOMIC); 828 sta->deflink.status_stats.lost_packets = 0; 829 } 830 831 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 832 struct ieee80211_tx_info *info, 833 int *retry_count) 834 { 835 int count = -1; 836 int i; 837 838 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 839 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 840 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 841 /* just the first aggr frame carry status info */ 842 info->status.rates[i].idx = -1; 843 info->status.rates[i].count = 0; 844 break; 845 } else if (info->status.rates[i].idx < 0) { 846 break; 847 } else if (i >= hw->max_report_rates) { 848 /* the HW cannot have attempted that rate */ 849 info->status.rates[i].idx = -1; 850 info->status.rates[i].count = 0; 851 break; 852 } 853 854 count += info->status.rates[i].count; 855 } 856 857 if (count < 0) 858 count = 0; 859 860 *retry_count = count; 861 return i - 1; 862 } 863 864 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 865 int retry_count, int shift, bool send_to_cooked, 866 struct ieee80211_tx_status *status) 867 { 868 struct sk_buff *skb2; 869 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 870 struct ieee80211_sub_if_data *sdata; 871 struct net_device *prev_dev = NULL; 872 int rtap_len; 873 874 /* send frame to monitor interfaces now */ 875 rtap_len = ieee80211_tx_radiotap_len(info, status); 876 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 877 pr_err("ieee80211_tx_status: headroom too small\n"); 878 dev_kfree_skb(skb); 879 return; 880 } 881 ieee80211_add_tx_radiotap_header(local, skb, retry_count, 882 rtap_len, shift, status); 883 884 /* XXX: is this sufficient for BPF? */ 885 skb_reset_mac_header(skb); 886 skb->ip_summed = CHECKSUM_UNNECESSARY; 887 skb->pkt_type = PACKET_OTHERHOST; 888 skb->protocol = htons(ETH_P_802_2); 889 memset(skb->cb, 0, sizeof(skb->cb)); 890 891 rcu_read_lock(); 892 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 893 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 894 if (!ieee80211_sdata_running(sdata)) 895 continue; 896 897 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && 898 !send_to_cooked) 899 continue; 900 901 if (prev_dev) { 902 skb2 = skb_clone(skb, GFP_ATOMIC); 903 if (skb2) { 904 skb2->dev = prev_dev; 905 netif_rx(skb2); 906 } 907 } 908 909 prev_dev = sdata->dev; 910 } 911 } 912 if (prev_dev) { 913 skb->dev = prev_dev; 914 netif_rx(skb); 915 skb = NULL; 916 } 917 rcu_read_unlock(); 918 dev_kfree_skb(skb); 919 } 920 921 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 922 struct ieee80211_tx_status *status, 923 int rates_idx, int retry_count) 924 { 925 struct sk_buff *skb = status->skb; 926 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 927 struct ieee80211_local *local = hw_to_local(hw); 928 struct ieee80211_tx_info *info = status->info; 929 struct sta_info *sta; 930 __le16 fc; 931 bool send_to_cooked; 932 bool acked; 933 bool noack_success; 934 struct ieee80211_bar *bar; 935 int shift = 0; 936 int tid = IEEE80211_NUM_TIDS; 937 938 fc = hdr->frame_control; 939 940 if (status->sta) { 941 sta = container_of(status->sta, struct sta_info, sta); 942 shift = ieee80211_vif_get_shift(&sta->sdata->vif); 943 944 if (info->flags & IEEE80211_TX_STATUS_EOSP) 945 clear_sta_flag(sta, WLAN_STA_SP); 946 947 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 948 noack_success = !!(info->flags & 949 IEEE80211_TX_STAT_NOACK_TRANSMITTED); 950 951 /* mesh Peer Service Period support */ 952 if (ieee80211_vif_is_mesh(&sta->sdata->vif) && 953 ieee80211_is_data_qos(fc)) 954 ieee80211_mpsp_trigger_process( 955 ieee80211_get_qos_ctl(hdr), sta, true, acked); 956 957 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && 958 (ieee80211_is_data(hdr->frame_control)) && 959 (rates_idx != -1)) 960 sta->deflink.tx_stats.last_rate = 961 info->status.rates[rates_idx]; 962 963 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 964 (ieee80211_is_data_qos(fc))) { 965 u16 ssn; 966 u8 *qc; 967 968 qc = ieee80211_get_qos_ctl(hdr); 969 tid = qc[0] & 0xf; 970 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 971 & IEEE80211_SCTL_SEQ); 972 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, 973 tid, ssn); 974 } else if (ieee80211_is_data_qos(fc)) { 975 u8 *qc = ieee80211_get_qos_ctl(hdr); 976 977 tid = qc[0] & 0xf; 978 } 979 980 if (!acked && ieee80211_is_back_req(fc)) { 981 u16 control; 982 983 /* 984 * BAR failed, store the last SSN and retry sending 985 * the BAR when the next unicast transmission on the 986 * same TID succeeds. 987 */ 988 bar = (struct ieee80211_bar *) skb->data; 989 control = le16_to_cpu(bar->control); 990 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { 991 u16 ssn = le16_to_cpu(bar->start_seq_num); 992 993 tid = (control & 994 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 995 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 996 997 ieee80211_set_bar_pending(sta, tid, ssn); 998 } 999 } 1000 1001 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 1002 ieee80211_handle_filtered_frame(local, sta, skb); 1003 return; 1004 } else if (ieee80211_is_data_present(fc)) { 1005 if (!acked && !noack_success) 1006 sta->deflink.status_stats.msdu_failed[tid]++; 1007 1008 sta->deflink.status_stats.msdu_retries[tid] += 1009 retry_count; 1010 } 1011 1012 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) 1013 ieee80211_frame_acked(sta, skb); 1014 1015 } 1016 1017 /* SNMP counters 1018 * Fragments are passed to low-level drivers as separate skbs, so these 1019 * are actually fragments, not frames. Update frame counters only for 1020 * the first fragment of the frame. */ 1021 if ((info->flags & IEEE80211_TX_STAT_ACK) || 1022 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 1023 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 1024 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1025 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 1026 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1027 if (retry_count > 0) 1028 I802_DEBUG_INC(local->dot11RetryCount); 1029 if (retry_count > 1) 1030 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1031 } 1032 1033 /* This counter shall be incremented for an acknowledged MPDU 1034 * with an individual address in the address 1 field or an MPDU 1035 * with a multicast address in the address 1 field of type Data 1036 * or Management. */ 1037 if (!is_multicast_ether_addr(hdr->addr1) || 1038 ieee80211_is_data(fc) || 1039 ieee80211_is_mgmt(fc)) 1040 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1041 } else { 1042 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1043 I802_DEBUG_INC(local->dot11FailedCount); 1044 } 1045 1046 if (ieee80211_is_any_nullfunc(fc) && 1047 ieee80211_has_pm(fc) && 1048 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1049 !(info->flags & IEEE80211_TX_CTL_INJECTED) && 1050 local->ps_sdata && !(local->scanning)) { 1051 if (info->flags & IEEE80211_TX_STAT_ACK) 1052 local->ps_sdata->u.mgd.flags |= 1053 IEEE80211_STA_NULLFUNC_ACKED; 1054 mod_timer(&local->dynamic_ps_timer, 1055 jiffies + msecs_to_jiffies(10)); 1056 } 1057 1058 ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp); 1059 1060 /* this was a transmitted frame, but now we want to reuse it */ 1061 skb_orphan(skb); 1062 1063 /* Need to make a copy before skb->cb gets cleared */ 1064 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || 1065 !(ieee80211_is_data(fc)); 1066 1067 /* 1068 * This is a bit racy but we can avoid a lot of work 1069 * with this test... 1070 */ 1071 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { 1072 if (status->free_list) 1073 list_add_tail(&skb->list, status->free_list); 1074 else 1075 dev_kfree_skb(skb); 1076 return; 1077 } 1078 1079 /* send to monitor interfaces */ 1080 ieee80211_tx_monitor(local, skb, retry_count, shift, 1081 send_to_cooked, status); 1082 } 1083 1084 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1085 { 1086 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1087 struct ieee80211_local *local = hw_to_local(hw); 1088 struct ieee80211_tx_status status = { 1089 .skb = skb, 1090 .info = IEEE80211_SKB_CB(skb), 1091 }; 1092 struct sta_info *sta; 1093 1094 rcu_read_lock(); 1095 1096 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 1097 if (sta) 1098 status.sta = &sta->sta; 1099 1100 ieee80211_tx_status_ext(hw, &status); 1101 rcu_read_unlock(); 1102 } 1103 EXPORT_SYMBOL(ieee80211_tx_status); 1104 1105 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1106 struct ieee80211_tx_status *status) 1107 { 1108 struct ieee80211_local *local = hw_to_local(hw); 1109 struct ieee80211_tx_info *info = status->info; 1110 struct ieee80211_sta *pubsta = status->sta; 1111 struct sk_buff *skb = status->skb; 1112 struct sta_info *sta = NULL; 1113 int rates_idx, retry_count; 1114 bool acked, noack_success, ack_signal_valid; 1115 u16 tx_time_est; 1116 1117 if (pubsta) { 1118 sta = container_of(pubsta, struct sta_info, sta); 1119 1120 if (status->n_rates) 1121 sta->deflink.tx_stats.last_rate_info = 1122 status->rates[status->n_rates - 1].rate_idx; 1123 } 1124 1125 if (skb && (tx_time_est = 1126 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) { 1127 /* Do this here to avoid the expensive lookup of the sta 1128 * in ieee80211_report_used_skb(). 1129 */ 1130 ieee80211_sta_update_pending_airtime(local, sta, 1131 skb_get_queue_mapping(skb), 1132 tx_time_est, 1133 true); 1134 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0); 1135 } 1136 1137 if (!status->info) 1138 goto free; 1139 1140 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 1141 1142 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1143 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1144 ack_signal_valid = 1145 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 1146 1147 if (pubsta) { 1148 struct ieee80211_sub_if_data *sdata = sta->sdata; 1149 1150 if (!acked && !noack_success) 1151 sta->deflink.status_stats.retry_failed++; 1152 sta->deflink.status_stats.retry_count += retry_count; 1153 1154 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 1155 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1156 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1157 ieee80211_sta_tx_notify(sdata, (void *) skb->data, 1158 acked, info->status.tx_time); 1159 1160 if (acked) { 1161 sta->deflink.status_stats.last_ack = jiffies; 1162 1163 if (sta->deflink.status_stats.lost_packets) 1164 sta->deflink.status_stats.lost_packets = 0; 1165 1166 /* Track when last packet was ACKed */ 1167 sta->deflink.status_stats.last_pkt_time = jiffies; 1168 1169 /* Reset connection monitor */ 1170 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1171 unlikely(sdata->u.mgd.probe_send_count > 0)) 1172 sdata->u.mgd.probe_send_count = 0; 1173 1174 if (ack_signal_valid) { 1175 sta->deflink.status_stats.last_ack_signal = 1176 (s8)info->status.ack_signal; 1177 sta->deflink.status_stats.ack_signal_filled = true; 1178 ewma_avg_signal_add(&sta->deflink.status_stats.avg_ack_signal, 1179 -info->status.ack_signal); 1180 } 1181 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1182 /* 1183 * The STA is in power save mode, so assume 1184 * that this TX packet failed because of that. 1185 */ 1186 if (skb) 1187 ieee80211_handle_filtered_frame(local, sta, skb); 1188 return; 1189 } else if (noack_success) { 1190 /* nothing to do here, do not account as lost */ 1191 } else { 1192 ieee80211_lost_packet(sta, info); 1193 } 1194 } 1195 1196 rate_control_tx_status(local, status); 1197 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1198 ieee80211s_update_metric(local, sta, status); 1199 } 1200 1201 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1202 return __ieee80211_tx_status(hw, status, rates_idx, 1203 retry_count); 1204 1205 if (acked || noack_success) { 1206 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1207 if (!pubsta) 1208 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1209 if (retry_count > 0) 1210 I802_DEBUG_INC(local->dot11RetryCount); 1211 if (retry_count > 1) 1212 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1213 } else { 1214 I802_DEBUG_INC(local->dot11FailedCount); 1215 } 1216 1217 free: 1218 if (!skb) 1219 return; 1220 1221 ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp); 1222 if (status->free_list) 1223 list_add_tail(&skb->list, status->free_list); 1224 else 1225 dev_kfree_skb(skb); 1226 } 1227 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1228 1229 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1230 struct ieee80211_sta *pubsta, 1231 struct ieee80211_tx_info *info) 1232 { 1233 struct ieee80211_local *local = hw_to_local(hw); 1234 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1235 struct ieee80211_tx_status status = { 1236 .info = info, 1237 .sta = pubsta, 1238 }; 1239 1240 rate_control_tx_status(local, &status); 1241 1242 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1243 sta->deflink.tx_stats.last_rate = info->status.rates[0]; 1244 } 1245 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1246 1247 void ieee80211_tx_status_8023(struct ieee80211_hw *hw, 1248 struct ieee80211_vif *vif, 1249 struct sk_buff *skb) 1250 { 1251 struct ieee80211_sub_if_data *sdata; 1252 struct ieee80211_tx_status status = { 1253 .skb = skb, 1254 .info = IEEE80211_SKB_CB(skb), 1255 }; 1256 struct sta_info *sta; 1257 1258 sdata = vif_to_sdata(vif); 1259 1260 rcu_read_lock(); 1261 1262 if (!ieee80211_lookup_ra_sta(sdata, skb, &sta) && !IS_ERR(sta)) 1263 status.sta = &sta->sta; 1264 1265 ieee80211_tx_status_ext(hw, &status); 1266 1267 rcu_read_unlock(); 1268 } 1269 EXPORT_SYMBOL(ieee80211_tx_status_8023); 1270 1271 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1272 { 1273 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1274 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1275 num_packets, GFP_ATOMIC); 1276 } 1277 EXPORT_SYMBOL(ieee80211_report_low_ack); 1278 1279 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1280 { 1281 struct ieee80211_local *local = hw_to_local(hw); 1282 ktime_t kt = ktime_set(0, 0); 1283 1284 ieee80211_report_used_skb(local, skb, true, kt); 1285 dev_kfree_skb_any(skb); 1286 } 1287 EXPORT_SYMBOL(ieee80211_free_txskb); 1288 1289 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1290 struct sk_buff_head *skbs) 1291 { 1292 struct sk_buff *skb; 1293 1294 while ((skb = __skb_dequeue(skbs))) 1295 ieee80211_free_txskb(hw, skb); 1296 } 1297