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->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->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->status_stats.lost_packets < pkt_thr || 793 !time_after(jiffies, sta->status_stats.last_pkt_time + pkt_time)) 794 return; 795 796 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 797 sta->status_stats.lost_packets, GFP_ATOMIC); 798 sta->status_stats.lost_packets = 0; 799 } 800 801 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 802 struct ieee80211_tx_info *info, 803 int *retry_count) 804 { 805 int count = -1; 806 int i; 807 808 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 809 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 810 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 811 /* just the first aggr frame carry status info */ 812 info->status.rates[i].idx = -1; 813 info->status.rates[i].count = 0; 814 break; 815 } else if (info->status.rates[i].idx < 0) { 816 break; 817 } else if (i >= hw->max_report_rates) { 818 /* the HW cannot have attempted that rate */ 819 info->status.rates[i].idx = -1; 820 info->status.rates[i].count = 0; 821 break; 822 } 823 824 count += info->status.rates[i].count; 825 } 826 827 if (count < 0) 828 count = 0; 829 830 *retry_count = count; 831 return i - 1; 832 } 833 834 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 835 struct ieee80211_supported_band *sband, 836 int retry_count, int shift, bool send_to_cooked, 837 struct ieee80211_tx_status *status) 838 { 839 struct sk_buff *skb2; 840 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 841 struct ieee80211_sub_if_data *sdata; 842 struct net_device *prev_dev = NULL; 843 int rtap_len; 844 845 /* send frame to monitor interfaces now */ 846 rtap_len = ieee80211_tx_radiotap_len(info, status); 847 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 848 pr_err("ieee80211_tx_status: headroom too small\n"); 849 dev_kfree_skb(skb); 850 return; 851 } 852 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, 853 rtap_len, shift, status); 854 855 /* XXX: is this sufficient for BPF? */ 856 skb_reset_mac_header(skb); 857 skb->ip_summed = CHECKSUM_UNNECESSARY; 858 skb->pkt_type = PACKET_OTHERHOST; 859 skb->protocol = htons(ETH_P_802_2); 860 memset(skb->cb, 0, sizeof(skb->cb)); 861 862 rcu_read_lock(); 863 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 864 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 865 if (!ieee80211_sdata_running(sdata)) 866 continue; 867 868 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && 869 !send_to_cooked) 870 continue; 871 872 if (prev_dev) { 873 skb2 = skb_clone(skb, GFP_ATOMIC); 874 if (skb2) { 875 skb2->dev = prev_dev; 876 netif_rx(skb2); 877 } 878 } 879 880 prev_dev = sdata->dev; 881 } 882 } 883 if (prev_dev) { 884 skb->dev = prev_dev; 885 netif_rx(skb); 886 skb = NULL; 887 } 888 rcu_read_unlock(); 889 dev_kfree_skb(skb); 890 } 891 892 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 893 struct ieee80211_tx_status *status, 894 int rates_idx, int retry_count) 895 { 896 struct sk_buff *skb = status->skb; 897 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 898 struct ieee80211_local *local = hw_to_local(hw); 899 struct ieee80211_tx_info *info = status->info; 900 struct sta_info *sta; 901 __le16 fc; 902 struct ieee80211_supported_band *sband; 903 bool send_to_cooked; 904 bool acked; 905 bool noack_success; 906 struct ieee80211_bar *bar; 907 int shift = 0; 908 int tid = IEEE80211_NUM_TIDS; 909 910 sband = local->hw.wiphy->bands[info->band]; 911 fc = hdr->frame_control; 912 913 if (status->sta) { 914 sta = container_of(status->sta, struct sta_info, sta); 915 shift = ieee80211_vif_get_shift(&sta->sdata->vif); 916 917 if (info->flags & IEEE80211_TX_STATUS_EOSP) 918 clear_sta_flag(sta, WLAN_STA_SP); 919 920 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 921 noack_success = !!(info->flags & 922 IEEE80211_TX_STAT_NOACK_TRANSMITTED); 923 924 /* mesh Peer Service Period support */ 925 if (ieee80211_vif_is_mesh(&sta->sdata->vif) && 926 ieee80211_is_data_qos(fc)) 927 ieee80211_mpsp_trigger_process( 928 ieee80211_get_qos_ctl(hdr), sta, true, acked); 929 930 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && 931 (ieee80211_is_data(hdr->frame_control)) && 932 (rates_idx != -1)) 933 sta->tx_stats.last_rate = 934 info->status.rates[rates_idx]; 935 936 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 937 (ieee80211_is_data_qos(fc))) { 938 u16 ssn; 939 u8 *qc; 940 941 qc = ieee80211_get_qos_ctl(hdr); 942 tid = qc[0] & 0xf; 943 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 944 & IEEE80211_SCTL_SEQ); 945 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, 946 tid, ssn); 947 } else if (ieee80211_is_data_qos(fc)) { 948 u8 *qc = ieee80211_get_qos_ctl(hdr); 949 950 tid = qc[0] & 0xf; 951 } 952 953 if (!acked && ieee80211_is_back_req(fc)) { 954 u16 control; 955 956 /* 957 * BAR failed, store the last SSN and retry sending 958 * the BAR when the next unicast transmission on the 959 * same TID succeeds. 960 */ 961 bar = (struct ieee80211_bar *) skb->data; 962 control = le16_to_cpu(bar->control); 963 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { 964 u16 ssn = le16_to_cpu(bar->start_seq_num); 965 966 tid = (control & 967 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 968 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 969 970 ieee80211_set_bar_pending(sta, tid, ssn); 971 } 972 } 973 974 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 975 ieee80211_handle_filtered_frame(local, sta, skb); 976 return; 977 } else if (ieee80211_is_data_present(fc)) { 978 if (!acked && !noack_success) 979 sta->status_stats.msdu_failed[tid]++; 980 981 sta->status_stats.msdu_retries[tid] += 982 retry_count; 983 } 984 985 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) 986 ieee80211_frame_acked(sta, skb); 987 988 } else if (wiphy_ext_feature_isset(local->hw.wiphy, 989 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS)) { 990 struct ieee80211_sub_if_data *sdata; 991 struct ieee80211_txq *txq; 992 u32 airtime; 993 994 /* Account airtime to multicast queue */ 995 sdata = ieee80211_sdata_from_skb(local, skb); 996 997 if (sdata && (txq = sdata->vif.txq)) { 998 airtime = info->status.tx_time ?: 999 ieee80211_calc_expected_tx_airtime(hw, 1000 &sdata->vif, 1001 NULL, 1002 skb->len, 1003 false); 1004 1005 ieee80211_register_airtime(txq, airtime, 0); 1006 } 1007 } 1008 1009 /* SNMP counters 1010 * Fragments are passed to low-level drivers as separate skbs, so these 1011 * are actually fragments, not frames. Update frame counters only for 1012 * the first fragment of the frame. */ 1013 if ((info->flags & IEEE80211_TX_STAT_ACK) || 1014 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 1015 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 1016 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1017 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 1018 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1019 if (retry_count > 0) 1020 I802_DEBUG_INC(local->dot11RetryCount); 1021 if (retry_count > 1) 1022 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1023 } 1024 1025 /* This counter shall be incremented for an acknowledged MPDU 1026 * with an individual address in the address 1 field or an MPDU 1027 * with a multicast address in the address 1 field of type Data 1028 * or Management. */ 1029 if (!is_multicast_ether_addr(hdr->addr1) || 1030 ieee80211_is_data(fc) || 1031 ieee80211_is_mgmt(fc)) 1032 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1033 } else { 1034 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1035 I802_DEBUG_INC(local->dot11FailedCount); 1036 } 1037 1038 if (ieee80211_is_any_nullfunc(fc) && 1039 ieee80211_has_pm(fc) && 1040 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1041 !(info->flags & IEEE80211_TX_CTL_INJECTED) && 1042 local->ps_sdata && !(local->scanning)) { 1043 if (info->flags & IEEE80211_TX_STAT_ACK) 1044 local->ps_sdata->u.mgd.flags |= 1045 IEEE80211_STA_NULLFUNC_ACKED; 1046 mod_timer(&local->dynamic_ps_timer, 1047 jiffies + msecs_to_jiffies(10)); 1048 } 1049 1050 ieee80211_report_used_skb(local, skb, false); 1051 1052 /* this was a transmitted frame, but now we want to reuse it */ 1053 skb_orphan(skb); 1054 1055 /* Need to make a copy before skb->cb gets cleared */ 1056 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || 1057 !(ieee80211_is_data(fc)); 1058 1059 /* 1060 * This is a bit racy but we can avoid a lot of work 1061 * with this test... 1062 */ 1063 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { 1064 if (status->free_list) 1065 list_add_tail(&skb->list, status->free_list); 1066 else 1067 dev_kfree_skb(skb); 1068 return; 1069 } 1070 1071 /* send to monitor interfaces */ 1072 ieee80211_tx_monitor(local, skb, sband, retry_count, shift, 1073 send_to_cooked, status); 1074 } 1075 1076 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1077 { 1078 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1079 struct ieee80211_local *local = hw_to_local(hw); 1080 struct ieee80211_tx_status status = { 1081 .skb = skb, 1082 .info = IEEE80211_SKB_CB(skb), 1083 }; 1084 struct sta_info *sta; 1085 1086 rcu_read_lock(); 1087 1088 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 1089 if (sta) 1090 status.sta = &sta->sta; 1091 1092 ieee80211_tx_status_ext(hw, &status); 1093 rcu_read_unlock(); 1094 } 1095 EXPORT_SYMBOL(ieee80211_tx_status); 1096 1097 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1098 struct ieee80211_tx_status *status) 1099 { 1100 struct ieee80211_local *local = hw_to_local(hw); 1101 struct ieee80211_tx_info *info = status->info; 1102 struct ieee80211_sta *pubsta = status->sta; 1103 struct sk_buff *skb = status->skb; 1104 struct ieee80211_supported_band *sband; 1105 struct sta_info *sta = NULL; 1106 int rates_idx, retry_count; 1107 bool acked, noack_success, ack_signal_valid; 1108 u16 tx_time_est; 1109 1110 if (pubsta) { 1111 sta = container_of(pubsta, struct sta_info, sta); 1112 1113 if (status->rate) 1114 sta->tx_stats.last_rate_info = *status->rate; 1115 } 1116 1117 if (skb && (tx_time_est = 1118 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) { 1119 /* Do this here to avoid the expensive lookup of the sta 1120 * in ieee80211_report_used_skb(). 1121 */ 1122 ieee80211_sta_update_pending_airtime(local, sta, 1123 skb_get_queue_mapping(skb), 1124 tx_time_est, 1125 true); 1126 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0); 1127 } 1128 1129 if (!status->info) 1130 goto free; 1131 1132 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 1133 1134 sband = hw->wiphy->bands[info->band]; 1135 1136 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1137 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1138 ack_signal_valid = 1139 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 1140 1141 if (pubsta) { 1142 struct ieee80211_sub_if_data *sdata = sta->sdata; 1143 1144 if (!acked && !noack_success) 1145 sta->status_stats.retry_failed++; 1146 sta->status_stats.retry_count += retry_count; 1147 1148 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 1149 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1150 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1151 ieee80211_sta_tx_notify(sdata, (void *) skb->data, 1152 acked, info->status.tx_time); 1153 1154 if (acked) { 1155 sta->status_stats.last_ack = jiffies; 1156 1157 if (sta->status_stats.lost_packets) 1158 sta->status_stats.lost_packets = 0; 1159 1160 /* Track when last packet was ACKed */ 1161 sta->status_stats.last_pkt_time = jiffies; 1162 1163 /* Reset connection monitor */ 1164 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1165 unlikely(sdata->u.mgd.probe_send_count > 0)) 1166 sdata->u.mgd.probe_send_count = 0; 1167 1168 if (ack_signal_valid) { 1169 sta->status_stats.last_ack_signal = 1170 (s8)info->status.ack_signal; 1171 sta->status_stats.ack_signal_filled = true; 1172 ewma_avg_signal_add(&sta->status_stats.avg_ack_signal, 1173 -info->status.ack_signal); 1174 } 1175 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1176 /* 1177 * The STA is in power save mode, so assume 1178 * that this TX packet failed because of that. 1179 */ 1180 if (skb) 1181 ieee80211_handle_filtered_frame(local, sta, skb); 1182 return; 1183 } else if (noack_success) { 1184 /* nothing to do here, do not account as lost */ 1185 } else { 1186 ieee80211_lost_packet(sta, info); 1187 } 1188 } 1189 1190 rate_control_tx_status(local, sband, status); 1191 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1192 ieee80211s_update_metric(local, sta, status); 1193 } 1194 1195 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1196 return __ieee80211_tx_status(hw, status, rates_idx, 1197 retry_count); 1198 1199 if (acked || noack_success) { 1200 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1201 if (!pubsta) 1202 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1203 if (retry_count > 0) 1204 I802_DEBUG_INC(local->dot11RetryCount); 1205 if (retry_count > 1) 1206 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1207 } else { 1208 I802_DEBUG_INC(local->dot11FailedCount); 1209 } 1210 1211 free: 1212 if (!skb) 1213 return; 1214 1215 ieee80211_report_used_skb(local, skb, false); 1216 if (status->free_list) 1217 list_add_tail(&skb->list, status->free_list); 1218 else 1219 dev_kfree_skb(skb); 1220 } 1221 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1222 1223 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1224 struct ieee80211_sta *pubsta, 1225 struct ieee80211_tx_info *info) 1226 { 1227 struct ieee80211_local *local = hw_to_local(hw); 1228 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band]; 1229 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1230 struct ieee80211_tx_status status = { 1231 .info = info, 1232 .sta = pubsta, 1233 }; 1234 1235 rate_control_tx_status(local, sband, &status); 1236 1237 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1238 sta->tx_stats.last_rate = info->status.rates[0]; 1239 } 1240 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1241 1242 void ieee80211_tx_status_8023(struct ieee80211_hw *hw, 1243 struct ieee80211_vif *vif, 1244 struct sk_buff *skb) 1245 { 1246 struct ieee80211_sub_if_data *sdata; 1247 struct ieee80211_tx_status status = { 1248 .skb = skb, 1249 .info = IEEE80211_SKB_CB(skb), 1250 }; 1251 struct sta_info *sta; 1252 1253 sdata = vif_to_sdata(vif); 1254 1255 rcu_read_lock(); 1256 1257 if (!ieee80211_lookup_ra_sta(sdata, skb, &sta) && !IS_ERR(sta)) 1258 status.sta = &sta->sta; 1259 1260 ieee80211_tx_status_ext(hw, &status); 1261 1262 rcu_read_unlock(); 1263 } 1264 EXPORT_SYMBOL(ieee80211_tx_status_8023); 1265 1266 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1267 { 1268 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1269 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1270 num_packets, GFP_ATOMIC); 1271 } 1272 EXPORT_SYMBOL(ieee80211_report_low_ack); 1273 1274 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1275 { 1276 struct ieee80211_local *local = hw_to_local(hw); 1277 1278 ieee80211_report_used_skb(local, skb, true); 1279 dev_kfree_skb_any(skb); 1280 } 1281 EXPORT_SYMBOL(ieee80211_free_txskb); 1282 1283 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1284 struct sk_buff_head *skbs) 1285 { 1286 struct sk_buff *skb; 1287 1288 while ((skb = __skb_dequeue(skbs))) 1289 ieee80211_free_txskb(hw, skb); 1290 } 1291