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->smps_mode = smps_mode; 227 ieee80211_queue_work(&local->hw, &sdata->recalc_smps); 228 } else if (sdata->vif.type == NL80211_IFTYPE_AP || 229 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 230 sta->known_smps_mode = smps_mode; 231 } 232 } 233 } 234 235 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) 236 { 237 struct tid_ampdu_tx *tid_tx; 238 239 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 240 if (!tid_tx) 241 return; 242 243 tid_tx->failed_bar_ssn = ssn; 244 tid_tx->bar_pending = true; 245 } 246 247 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info, 248 struct ieee80211_tx_status *status) 249 { 250 int len = sizeof(struct ieee80211_radiotap_header); 251 252 /* IEEE80211_RADIOTAP_RATE rate */ 253 if (status && status->rate && !(status->rate->flags & 254 (RATE_INFO_FLAGS_MCS | 255 RATE_INFO_FLAGS_DMG | 256 RATE_INFO_FLAGS_EDMG | 257 RATE_INFO_FLAGS_VHT_MCS | 258 RATE_INFO_FLAGS_HE_MCS))) 259 len += 2; 260 else if (info->status.rates[0].idx >= 0 && 261 !(info->status.rates[0].flags & 262 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))) 263 len += 2; 264 265 /* IEEE80211_RADIOTAP_TX_FLAGS */ 266 len += 2; 267 268 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 269 len += 1; 270 271 /* IEEE80211_RADIOTAP_MCS 272 * IEEE80211_RADIOTAP_VHT */ 273 if (status && status->rate) { 274 if (status->rate->flags & RATE_INFO_FLAGS_MCS) 275 len += 3; 276 else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS) 277 len = ALIGN(len, 2) + 12; 278 else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS) 279 len = ALIGN(len, 2) + 12; 280 } else if (info->status.rates[0].idx >= 0) { 281 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) 282 len += 3; 283 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) 284 len = ALIGN(len, 2) + 12; 285 } 286 287 return len; 288 } 289 290 static void 291 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, 292 struct ieee80211_supported_band *sband, 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 unsigned char *pos; 301 u16 legacy_rate = 0; 302 u16 txflags; 303 304 rthdr = skb_push(skb, rtap_len); 305 306 memset(rthdr, 0, rtap_len); 307 rthdr->it_len = cpu_to_le16(rtap_len); 308 rthdr->it_present = 309 cpu_to_le32(BIT(IEEE80211_RADIOTAP_TX_FLAGS) | 310 BIT(IEEE80211_RADIOTAP_DATA_RETRIES)); 311 pos = (unsigned char *)(rthdr + 1); 312 313 /* 314 * XXX: Once radiotap gets the bitmap reset thing the vendor 315 * extensions proposal contains, we can actually report 316 * the whole set of tries we did. 317 */ 318 319 /* IEEE80211_RADIOTAP_RATE */ 320 321 if (status && status->rate) { 322 if (!(status->rate->flags & (RATE_INFO_FLAGS_MCS | 323 RATE_INFO_FLAGS_DMG | 324 RATE_INFO_FLAGS_EDMG | 325 RATE_INFO_FLAGS_VHT_MCS | 326 RATE_INFO_FLAGS_HE_MCS))) 327 legacy_rate = status->rate->legacy; 328 } else if (info->status.rates[0].idx >= 0 && 329 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | 330 IEEE80211_TX_RC_VHT_MCS))) 331 legacy_rate = 332 sband->bitrates[info->status.rates[0].idx].bitrate; 333 334 if (legacy_rate) { 335 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE)); 336 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift)); 337 /* padding for tx flags */ 338 pos += 2; 339 } 340 341 /* IEEE80211_RADIOTAP_TX_FLAGS */ 342 txflags = 0; 343 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 344 !is_multicast_ether_addr(hdr->addr1)) 345 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; 346 347 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 348 txflags |= IEEE80211_RADIOTAP_F_TX_CTS; 349 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) 350 txflags |= IEEE80211_RADIOTAP_F_TX_RTS; 351 352 put_unaligned_le16(txflags, pos); 353 pos += 2; 354 355 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 356 /* for now report the total retry_count */ 357 *pos = retry_count; 358 pos++; 359 360 if (status && status->rate && 361 (status->rate->flags & RATE_INFO_FLAGS_MCS)) { 362 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); 363 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 364 IEEE80211_RADIOTAP_MCS_HAVE_GI | 365 IEEE80211_RADIOTAP_MCS_HAVE_BW; 366 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI) 367 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 368 if (status->rate->bw == RATE_INFO_BW_40) 369 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 370 pos[2] = status->rate->mcs; 371 pos += 3; 372 } else if (status && status->rate && 373 (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) { 374 u16 known = local->hw.radiotap_vht_details & 375 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 376 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 377 378 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); 379 380 /* required alignment from rthdr */ 381 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 382 383 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 384 put_unaligned_le16(known, pos); 385 pos += 2; 386 387 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 388 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI) 389 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 390 pos++; 391 392 /* u8 bandwidth */ 393 switch (status->rate->bw) { 394 case RATE_INFO_BW_160: 395 *pos = 11; 396 break; 397 case RATE_INFO_BW_80: 398 *pos = 4; 399 break; 400 case RATE_INFO_BW_40: 401 *pos = 1; 402 break; 403 default: 404 *pos = 0; 405 break; 406 } 407 pos++; 408 409 /* u8 mcs_nss[4] */ 410 *pos = (status->rate->mcs << 4) | status->rate->nss; 411 pos += 4; 412 413 /* u8 coding */ 414 pos++; 415 /* u8 group_id */ 416 pos++; 417 /* u16 partial_aid */ 418 pos += 2; 419 } else if (status && status->rate && 420 (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) { 421 struct ieee80211_radiotap_he *he; 422 423 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE)); 424 425 /* required alignment from rthdr */ 426 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 427 he = (struct ieee80211_radiotap_he *)pos; 428 429 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU | 430 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 431 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 432 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 433 434 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN); 435 436 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f) 437 438 he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss); 439 440 #define CHECK_GI(s) \ 441 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \ 442 (int)NL80211_RATE_INFO_HE_GI_##s) 443 444 CHECK_GI(0_8); 445 CHECK_GI(1_6); 446 CHECK_GI(3_2); 447 448 he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs); 449 he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm); 450 451 he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi); 452 453 switch (status->rate->bw) { 454 case RATE_INFO_BW_20: 455 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 456 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ); 457 break; 458 case RATE_INFO_BW_40: 459 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 460 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ); 461 break; 462 case RATE_INFO_BW_80: 463 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 464 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ); 465 break; 466 case RATE_INFO_BW_160: 467 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 468 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ); 469 break; 470 case RATE_INFO_BW_HE_RU: 471 #define CHECK_RU_ALLOC(s) \ 472 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \ 473 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4) 474 475 CHECK_RU_ALLOC(26); 476 CHECK_RU_ALLOC(52); 477 CHECK_RU_ALLOC(106); 478 CHECK_RU_ALLOC(242); 479 CHECK_RU_ALLOC(484); 480 CHECK_RU_ALLOC(996); 481 CHECK_RU_ALLOC(2x996); 482 483 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 484 status->rate->he_ru_alloc + 4); 485 break; 486 default: 487 WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw); 488 } 489 490 pos += sizeof(struct ieee80211_radiotap_he); 491 } 492 493 if ((status && status->rate) || info->status.rates[0].idx < 0) 494 return; 495 496 /* IEEE80211_RADIOTAP_MCS 497 * IEEE80211_RADIOTAP_VHT */ 498 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { 499 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); 500 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 501 IEEE80211_RADIOTAP_MCS_HAVE_GI | 502 IEEE80211_RADIOTAP_MCS_HAVE_BW; 503 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 504 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 505 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 506 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 507 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) 508 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; 509 pos[2] = info->status.rates[0].idx; 510 pos += 3; 511 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { 512 u16 known = local->hw.radiotap_vht_details & 513 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 514 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 515 516 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); 517 518 /* required alignment from rthdr */ 519 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 520 521 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 522 put_unaligned_le16(known, pos); 523 pos += 2; 524 525 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 526 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 527 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 528 pos++; 529 530 /* u8 bandwidth */ 531 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 532 *pos = 1; 533 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 534 *pos = 4; 535 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 536 *pos = 11; 537 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ 538 *pos = 0; 539 pos++; 540 541 /* u8 mcs_nss[4] */ 542 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | 543 ieee80211_rate_get_vht_nss(&info->status.rates[0]); 544 pos += 4; 545 546 /* u8 coding */ 547 pos++; 548 /* u8 group_id */ 549 pos++; 550 /* u16 partial_aid */ 551 pos += 2; 552 } 553 } 554 555 /* 556 * Handles the tx for TDLS teardown frames. 557 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP 558 */ 559 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, 560 struct ieee80211_sub_if_data *sdata, 561 struct sk_buff *skb, u32 flags) 562 { 563 struct sk_buff *teardown_skb; 564 struct sk_buff *orig_teardown_skb; 565 bool is_teardown = false; 566 567 /* Get the teardown data we need and free the lock */ 568 spin_lock(&sdata->u.mgd.teardown_lock); 569 teardown_skb = sdata->u.mgd.teardown_skb; 570 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; 571 if ((skb == orig_teardown_skb) && teardown_skb) { 572 sdata->u.mgd.teardown_skb = NULL; 573 sdata->u.mgd.orig_teardown_skb = NULL; 574 is_teardown = true; 575 } 576 spin_unlock(&sdata->u.mgd.teardown_lock); 577 578 if (is_teardown) { 579 /* This mechanism relies on being able to get ACKs */ 580 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); 581 582 /* Check if peer has ACKed */ 583 if (flags & IEEE80211_TX_STAT_ACK) { 584 dev_kfree_skb_any(teardown_skb); 585 } else { 586 tdls_dbg(sdata, 587 "TDLS Resending teardown through AP\n"); 588 589 ieee80211_subif_start_xmit(teardown_skb, skb->dev); 590 } 591 } 592 } 593 594 static struct ieee80211_sub_if_data * 595 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) 596 { 597 struct ieee80211_sub_if_data *sdata; 598 599 if (skb->dev) { 600 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 601 if (!sdata->dev) 602 continue; 603 604 if (skb->dev == sdata->dev) 605 return sdata; 606 } 607 608 return NULL; 609 } 610 611 return rcu_dereference(local->p2p_sdata); 612 } 613 614 static void ieee80211_report_ack_skb(struct ieee80211_local *local, 615 struct ieee80211_tx_info *info, 616 bool acked, bool dropped) 617 { 618 struct sk_buff *skb; 619 unsigned long flags; 620 621 spin_lock_irqsave(&local->ack_status_lock, flags); 622 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id); 623 spin_unlock_irqrestore(&local->ack_status_lock, flags); 624 625 if (!skb) 626 return; 627 628 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { 629 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; 630 struct ieee80211_sub_if_data *sdata; 631 struct ieee80211_hdr *hdr = (void *)skb->data; 632 bool is_valid_ack_signal = 633 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 634 635 rcu_read_lock(); 636 sdata = ieee80211_sdata_from_skb(local, skb); 637 if (sdata) { 638 if (skb->protocol == sdata->control_port_protocol || 639 skb->protocol == cpu_to_be16(ETH_P_PREAUTH)) 640 cfg80211_control_port_tx_status(&sdata->wdev, 641 cookie, 642 skb->data, 643 skb->len, 644 acked, 645 GFP_ATOMIC); 646 else if (ieee80211_is_any_nullfunc(hdr->frame_control)) 647 cfg80211_probe_status(sdata->dev, hdr->addr1, 648 cookie, acked, 649 info->status.ack_signal, 650 is_valid_ack_signal, 651 GFP_ATOMIC); 652 else if (ieee80211_is_mgmt(hdr->frame_control)) 653 cfg80211_mgmt_tx_status(&sdata->wdev, cookie, 654 skb->data, skb->len, 655 acked, GFP_ATOMIC); 656 else 657 pr_warn("Unknown status report in ack skb\n"); 658 659 } 660 rcu_read_unlock(); 661 662 dev_kfree_skb_any(skb); 663 } else if (dropped) { 664 dev_kfree_skb_any(skb); 665 } else { 666 /* consumes skb */ 667 skb_complete_wifi_ack(skb, acked); 668 } 669 } 670 671 static void ieee80211_report_used_skb(struct ieee80211_local *local, 672 struct sk_buff *skb, bool dropped) 673 { 674 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 675 u16 tx_time_est = ieee80211_info_get_tx_time_est(info); 676 struct ieee80211_hdr *hdr = (void *)skb->data; 677 bool acked = info->flags & IEEE80211_TX_STAT_ACK; 678 679 if (dropped) 680 acked = false; 681 682 if (tx_time_est) { 683 struct sta_info *sta; 684 685 rcu_read_lock(); 686 687 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 688 ieee80211_sta_update_pending_airtime(local, sta, 689 skb_get_queue_mapping(skb), 690 tx_time_est, 691 true); 692 rcu_read_unlock(); 693 } 694 695 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { 696 struct ieee80211_sub_if_data *sdata; 697 698 rcu_read_lock(); 699 700 sdata = ieee80211_sdata_from_skb(local, skb); 701 702 if (!sdata) { 703 skb->dev = NULL; 704 } else { 705 unsigned int hdr_size = 706 ieee80211_hdrlen(hdr->frame_control); 707 708 /* Check to see if packet is a TDLS teardown packet */ 709 if (ieee80211_is_data(hdr->frame_control) && 710 (ieee80211_get_tdls_action(skb, hdr_size) == 711 WLAN_TDLS_TEARDOWN)) { 712 ieee80211_tdls_td_tx_handle(local, sdata, skb, 713 info->flags); 714 } else if (ieee80211_s1g_is_twt_setup(skb)) { 715 if (!acked) { 716 struct sk_buff *qskb; 717 718 qskb = skb_clone(skb, GFP_ATOMIC); 719 if (qskb) { 720 skb_queue_tail(&sdata->status_queue, 721 qskb); 722 ieee80211_queue_work(&local->hw, 723 &sdata->work); 724 } 725 } 726 } else { 727 ieee80211_mgd_conn_tx_status(sdata, 728 hdr->frame_control, 729 acked); 730 } 731 } 732 733 rcu_read_unlock(); 734 } else if (info->ack_frame_id) { 735 ieee80211_report_ack_skb(local, info, acked, dropped); 736 } 737 738 if (!dropped && skb->destructor) { 739 skb->wifi_acked_valid = 1; 740 skb->wifi_acked = acked; 741 } 742 743 ieee80211_led_tx(local); 744 745 if (skb_has_frag_list(skb)) { 746 kfree_skb_list(skb_shinfo(skb)->frag_list); 747 skb_shinfo(skb)->frag_list = NULL; 748 } 749 } 750 751 /* 752 * Use a static threshold for now, best value to be determined 753 * by testing ... 754 * Should it depend on: 755 * - on # of retransmissions 756 * - current throughput (higher value for higher tpt)? 757 */ 758 #define STA_LOST_PKT_THRESHOLD 50 759 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */ 760 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ 761 762 static void ieee80211_lost_packet(struct sta_info *sta, 763 struct ieee80211_tx_info *info) 764 { 765 unsigned long pkt_time = STA_LOST_PKT_TIME; 766 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD; 767 768 /* If driver relies on its own algorithm for station kickout, skip 769 * mac80211 packet loss mechanism. 770 */ 771 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) 772 return; 773 774 /* This packet was aggregated but doesn't carry status info */ 775 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 776 !(info->flags & IEEE80211_TX_STAT_AMPDU)) 777 return; 778 779 sta->deflink.status_stats.lost_packets++; 780 if (sta->sta.tdls) { 781 pkt_time = STA_LOST_TDLS_PKT_TIME; 782 pkt_thr = STA_LOST_PKT_THRESHOLD; 783 } 784 785 /* 786 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD 787 * of the last packets were lost, and that no ACK was received in the 788 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss 789 * mechanism. 790 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME 791 */ 792 if (sta->deflink.status_stats.lost_packets < pkt_thr || 793 !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time)) 794 return; 795 796 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 797 sta->deflink.status_stats.lost_packets, 798 GFP_ATOMIC); 799 sta->deflink.status_stats.lost_packets = 0; 800 } 801 802 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 803 struct ieee80211_tx_info *info, 804 int *retry_count) 805 { 806 int count = -1; 807 int i; 808 809 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 810 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 811 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 812 /* just the first aggr frame carry status info */ 813 info->status.rates[i].idx = -1; 814 info->status.rates[i].count = 0; 815 break; 816 } else if (info->status.rates[i].idx < 0) { 817 break; 818 } else if (i >= hw->max_report_rates) { 819 /* the HW cannot have attempted that rate */ 820 info->status.rates[i].idx = -1; 821 info->status.rates[i].count = 0; 822 break; 823 } 824 825 count += info->status.rates[i].count; 826 } 827 828 if (count < 0) 829 count = 0; 830 831 *retry_count = count; 832 return i - 1; 833 } 834 835 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 836 struct ieee80211_supported_band *sband, 837 int retry_count, int shift, bool send_to_cooked, 838 struct ieee80211_tx_status *status) 839 { 840 struct sk_buff *skb2; 841 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 842 struct ieee80211_sub_if_data *sdata; 843 struct net_device *prev_dev = NULL; 844 int rtap_len; 845 846 /* send frame to monitor interfaces now */ 847 rtap_len = ieee80211_tx_radiotap_len(info, status); 848 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 849 pr_err("ieee80211_tx_status: headroom too small\n"); 850 dev_kfree_skb(skb); 851 return; 852 } 853 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, 854 rtap_len, shift, status); 855 856 /* XXX: is this sufficient for BPF? */ 857 skb_reset_mac_header(skb); 858 skb->ip_summed = CHECKSUM_UNNECESSARY; 859 skb->pkt_type = PACKET_OTHERHOST; 860 skb->protocol = htons(ETH_P_802_2); 861 memset(skb->cb, 0, sizeof(skb->cb)); 862 863 rcu_read_lock(); 864 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 865 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 866 if (!ieee80211_sdata_running(sdata)) 867 continue; 868 869 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && 870 !send_to_cooked) 871 continue; 872 873 if (prev_dev) { 874 skb2 = skb_clone(skb, GFP_ATOMIC); 875 if (skb2) { 876 skb2->dev = prev_dev; 877 netif_rx(skb2); 878 } 879 } 880 881 prev_dev = sdata->dev; 882 } 883 } 884 if (prev_dev) { 885 skb->dev = prev_dev; 886 netif_rx(skb); 887 skb = NULL; 888 } 889 rcu_read_unlock(); 890 dev_kfree_skb(skb); 891 } 892 893 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 894 struct ieee80211_tx_status *status, 895 int rates_idx, int retry_count) 896 { 897 struct sk_buff *skb = status->skb; 898 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 899 struct ieee80211_local *local = hw_to_local(hw); 900 struct ieee80211_tx_info *info = status->info; 901 struct sta_info *sta; 902 __le16 fc; 903 struct ieee80211_supported_band *sband; 904 bool send_to_cooked; 905 bool acked; 906 bool noack_success; 907 struct ieee80211_bar *bar; 908 int shift = 0; 909 int tid = IEEE80211_NUM_TIDS; 910 911 sband = local->hw.wiphy->bands[info->band]; 912 fc = hdr->frame_control; 913 914 if (status->sta) { 915 sta = container_of(status->sta, struct sta_info, sta); 916 shift = ieee80211_vif_get_shift(&sta->sdata->vif); 917 918 if (info->flags & IEEE80211_TX_STATUS_EOSP) 919 clear_sta_flag(sta, WLAN_STA_SP); 920 921 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 922 noack_success = !!(info->flags & 923 IEEE80211_TX_STAT_NOACK_TRANSMITTED); 924 925 /* mesh Peer Service Period support */ 926 if (ieee80211_vif_is_mesh(&sta->sdata->vif) && 927 ieee80211_is_data_qos(fc)) 928 ieee80211_mpsp_trigger_process( 929 ieee80211_get_qos_ctl(hdr), sta, true, acked); 930 931 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && 932 (ieee80211_is_data(hdr->frame_control)) && 933 (rates_idx != -1)) 934 sta->deflink.tx_stats.last_rate = 935 info->status.rates[rates_idx]; 936 937 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 938 (ieee80211_is_data_qos(fc))) { 939 u16 ssn; 940 u8 *qc; 941 942 qc = ieee80211_get_qos_ctl(hdr); 943 tid = qc[0] & 0xf; 944 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 945 & IEEE80211_SCTL_SEQ); 946 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, 947 tid, ssn); 948 } else if (ieee80211_is_data_qos(fc)) { 949 u8 *qc = ieee80211_get_qos_ctl(hdr); 950 951 tid = qc[0] & 0xf; 952 } 953 954 if (!acked && ieee80211_is_back_req(fc)) { 955 u16 control; 956 957 /* 958 * BAR failed, store the last SSN and retry sending 959 * the BAR when the next unicast transmission on the 960 * same TID succeeds. 961 */ 962 bar = (struct ieee80211_bar *) skb->data; 963 control = le16_to_cpu(bar->control); 964 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { 965 u16 ssn = le16_to_cpu(bar->start_seq_num); 966 967 tid = (control & 968 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 969 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 970 971 ieee80211_set_bar_pending(sta, tid, ssn); 972 } 973 } 974 975 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 976 ieee80211_handle_filtered_frame(local, sta, skb); 977 return; 978 } else if (ieee80211_is_data_present(fc)) { 979 if (!acked && !noack_success) 980 sta->deflink.status_stats.msdu_failed[tid]++; 981 982 sta->deflink.status_stats.msdu_retries[tid] += 983 retry_count; 984 } 985 986 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) 987 ieee80211_frame_acked(sta, skb); 988 989 } else if (wiphy_ext_feature_isset(local->hw.wiphy, 990 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS)) { 991 struct ieee80211_sub_if_data *sdata; 992 struct ieee80211_txq *txq; 993 u32 airtime; 994 995 /* Account airtime to multicast queue */ 996 sdata = ieee80211_sdata_from_skb(local, skb); 997 998 if (sdata && (txq = sdata->vif.txq)) { 999 airtime = info->status.tx_time ?: 1000 ieee80211_calc_expected_tx_airtime(hw, 1001 &sdata->vif, 1002 NULL, 1003 skb->len, 1004 false); 1005 1006 ieee80211_register_airtime(txq, airtime, 0); 1007 } 1008 } 1009 1010 /* SNMP counters 1011 * Fragments are passed to low-level drivers as separate skbs, so these 1012 * are actually fragments, not frames. Update frame counters only for 1013 * the first fragment of the frame. */ 1014 if ((info->flags & IEEE80211_TX_STAT_ACK) || 1015 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 1016 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 1017 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1018 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 1019 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1020 if (retry_count > 0) 1021 I802_DEBUG_INC(local->dot11RetryCount); 1022 if (retry_count > 1) 1023 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1024 } 1025 1026 /* This counter shall be incremented for an acknowledged MPDU 1027 * with an individual address in the address 1 field or an MPDU 1028 * with a multicast address in the address 1 field of type Data 1029 * or Management. */ 1030 if (!is_multicast_ether_addr(hdr->addr1) || 1031 ieee80211_is_data(fc) || 1032 ieee80211_is_mgmt(fc)) 1033 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1034 } else { 1035 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1036 I802_DEBUG_INC(local->dot11FailedCount); 1037 } 1038 1039 if (ieee80211_is_any_nullfunc(fc) && 1040 ieee80211_has_pm(fc) && 1041 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1042 !(info->flags & IEEE80211_TX_CTL_INJECTED) && 1043 local->ps_sdata && !(local->scanning)) { 1044 if (info->flags & IEEE80211_TX_STAT_ACK) 1045 local->ps_sdata->u.mgd.flags |= 1046 IEEE80211_STA_NULLFUNC_ACKED; 1047 mod_timer(&local->dynamic_ps_timer, 1048 jiffies + msecs_to_jiffies(10)); 1049 } 1050 1051 ieee80211_report_used_skb(local, skb, false); 1052 1053 /* this was a transmitted frame, but now we want to reuse it */ 1054 skb_orphan(skb); 1055 1056 /* Need to make a copy before skb->cb gets cleared */ 1057 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || 1058 !(ieee80211_is_data(fc)); 1059 1060 /* 1061 * This is a bit racy but we can avoid a lot of work 1062 * with this test... 1063 */ 1064 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { 1065 if (status->free_list) 1066 list_add_tail(&skb->list, status->free_list); 1067 else 1068 dev_kfree_skb(skb); 1069 return; 1070 } 1071 1072 /* send to monitor interfaces */ 1073 ieee80211_tx_monitor(local, skb, sband, retry_count, shift, 1074 send_to_cooked, status); 1075 } 1076 1077 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1078 { 1079 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1080 struct ieee80211_local *local = hw_to_local(hw); 1081 struct ieee80211_tx_status status = { 1082 .skb = skb, 1083 .info = IEEE80211_SKB_CB(skb), 1084 }; 1085 struct sta_info *sta; 1086 1087 rcu_read_lock(); 1088 1089 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 1090 if (sta) 1091 status.sta = &sta->sta; 1092 1093 ieee80211_tx_status_ext(hw, &status); 1094 rcu_read_unlock(); 1095 } 1096 EXPORT_SYMBOL(ieee80211_tx_status); 1097 1098 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1099 struct ieee80211_tx_status *status) 1100 { 1101 struct ieee80211_local *local = hw_to_local(hw); 1102 struct ieee80211_tx_info *info = status->info; 1103 struct ieee80211_sta *pubsta = status->sta; 1104 struct sk_buff *skb = status->skb; 1105 struct ieee80211_supported_band *sband; 1106 struct sta_info *sta = NULL; 1107 int rates_idx, retry_count; 1108 bool acked, noack_success, ack_signal_valid; 1109 u16 tx_time_est; 1110 1111 if (pubsta) { 1112 sta = container_of(pubsta, struct sta_info, sta); 1113 1114 if (status->rate) 1115 sta->deflink.tx_stats.last_rate_info = *status->rate; 1116 } 1117 1118 if (skb && (tx_time_est = 1119 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) { 1120 /* Do this here to avoid the expensive lookup of the sta 1121 * in ieee80211_report_used_skb(). 1122 */ 1123 ieee80211_sta_update_pending_airtime(local, sta, 1124 skb_get_queue_mapping(skb), 1125 tx_time_est, 1126 true); 1127 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0); 1128 } 1129 1130 if (!status->info) 1131 goto free; 1132 1133 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 1134 1135 sband = hw->wiphy->bands[info->band]; 1136 1137 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1138 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1139 ack_signal_valid = 1140 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 1141 1142 if (pubsta) { 1143 struct ieee80211_sub_if_data *sdata = sta->sdata; 1144 1145 if (!acked && !noack_success) 1146 sta->deflink.status_stats.retry_failed++; 1147 sta->deflink.status_stats.retry_count += retry_count; 1148 1149 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 1150 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1151 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1152 ieee80211_sta_tx_notify(sdata, (void *) skb->data, 1153 acked, info->status.tx_time); 1154 1155 if (acked) { 1156 sta->deflink.status_stats.last_ack = jiffies; 1157 1158 if (sta->deflink.status_stats.lost_packets) 1159 sta->deflink.status_stats.lost_packets = 0; 1160 1161 /* Track when last packet was ACKed */ 1162 sta->deflink.status_stats.last_pkt_time = jiffies; 1163 1164 /* Reset connection monitor */ 1165 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1166 unlikely(sdata->u.mgd.probe_send_count > 0)) 1167 sdata->u.mgd.probe_send_count = 0; 1168 1169 if (ack_signal_valid) { 1170 sta->deflink.status_stats.last_ack_signal = 1171 (s8)info->status.ack_signal; 1172 sta->deflink.status_stats.ack_signal_filled = true; 1173 ewma_avg_signal_add(&sta->deflink.status_stats.avg_ack_signal, 1174 -info->status.ack_signal); 1175 } 1176 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1177 /* 1178 * The STA is in power save mode, so assume 1179 * that this TX packet failed because of that. 1180 */ 1181 if (skb) 1182 ieee80211_handle_filtered_frame(local, sta, skb); 1183 return; 1184 } else if (noack_success) { 1185 /* nothing to do here, do not account as lost */ 1186 } else { 1187 ieee80211_lost_packet(sta, info); 1188 } 1189 } 1190 1191 rate_control_tx_status(local, sband, status); 1192 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1193 ieee80211s_update_metric(local, sta, status); 1194 } 1195 1196 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1197 return __ieee80211_tx_status(hw, status, rates_idx, 1198 retry_count); 1199 1200 if (acked || noack_success) { 1201 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1202 if (!pubsta) 1203 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1204 if (retry_count > 0) 1205 I802_DEBUG_INC(local->dot11RetryCount); 1206 if (retry_count > 1) 1207 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1208 } else { 1209 I802_DEBUG_INC(local->dot11FailedCount); 1210 } 1211 1212 free: 1213 if (!skb) 1214 return; 1215 1216 ieee80211_report_used_skb(local, skb, false); 1217 if (status->free_list) 1218 list_add_tail(&skb->list, status->free_list); 1219 else 1220 dev_kfree_skb(skb); 1221 } 1222 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1223 1224 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1225 struct ieee80211_sta *pubsta, 1226 struct ieee80211_tx_info *info) 1227 { 1228 struct ieee80211_local *local = hw_to_local(hw); 1229 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band]; 1230 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1231 struct ieee80211_tx_status status = { 1232 .info = info, 1233 .sta = pubsta, 1234 }; 1235 1236 rate_control_tx_status(local, sband, &status); 1237 1238 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1239 sta->deflink.tx_stats.last_rate = info->status.rates[0]; 1240 } 1241 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1242 1243 void ieee80211_tx_status_8023(struct ieee80211_hw *hw, 1244 struct ieee80211_vif *vif, 1245 struct sk_buff *skb) 1246 { 1247 struct ieee80211_sub_if_data *sdata; 1248 struct ieee80211_tx_status status = { 1249 .skb = skb, 1250 .info = IEEE80211_SKB_CB(skb), 1251 }; 1252 struct sta_info *sta; 1253 1254 sdata = vif_to_sdata(vif); 1255 1256 rcu_read_lock(); 1257 1258 if (!ieee80211_lookup_ra_sta(sdata, skb, &sta) && !IS_ERR(sta)) 1259 status.sta = &sta->sta; 1260 1261 ieee80211_tx_status_ext(hw, &status); 1262 1263 rcu_read_unlock(); 1264 } 1265 EXPORT_SYMBOL(ieee80211_tx_status_8023); 1266 1267 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1268 { 1269 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1270 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1271 num_packets, GFP_ATOMIC); 1272 } 1273 EXPORT_SYMBOL(ieee80211_report_low_ack); 1274 1275 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1276 { 1277 struct ieee80211_local *local = hw_to_local(hw); 1278 1279 ieee80211_report_used_skb(local, skb, true); 1280 dev_kfree_skb_any(skb); 1281 } 1282 EXPORT_SYMBOL(ieee80211_free_txskb); 1283 1284 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1285 struct sk_buff_head *skbs) 1286 { 1287 struct sk_buff *skb; 1288 1289 while ((skb = __skb_dequeue(skbs))) 1290 ieee80211_free_txskb(hw, skb); 1291 } 1292