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 */ 9 10 #include <linux/export.h> 11 #include <linux/etherdevice.h> 12 #include <net/mac80211.h> 13 #include <asm/unaligned.h> 14 #include "ieee80211_i.h" 15 #include "rate.h" 16 #include "mesh.h" 17 #include "led.h" 18 #include "wme.h" 19 20 21 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 22 struct sk_buff *skb) 23 { 24 struct ieee80211_local *local = hw_to_local(hw); 25 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 26 int tmp; 27 28 skb->pkt_type = IEEE80211_TX_STATUS_MSG; 29 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? 30 &local->skb_queue : &local->skb_queue_unreliable, skb); 31 tmp = skb_queue_len(&local->skb_queue) + 32 skb_queue_len(&local->skb_queue_unreliable); 33 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && 34 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 35 ieee80211_free_txskb(hw, skb); 36 tmp--; 37 I802_DEBUG_INC(local->tx_status_drop); 38 } 39 tasklet_schedule(&local->tasklet); 40 } 41 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); 42 43 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, 44 struct sta_info *sta, 45 struct sk_buff *skb) 46 { 47 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 48 struct ieee80211_hdr *hdr = (void *)skb->data; 49 int ac; 50 51 if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER | 52 IEEE80211_TX_CTL_AMPDU)) { 53 ieee80211_free_txskb(&local->hw, skb); 54 return; 55 } 56 57 /* 58 * This skb 'survived' a round-trip through the driver, and 59 * hopefully the driver didn't mangle it too badly. However, 60 * we can definitely not rely on the control information 61 * being correct. Clear it so we don't get junk there, and 62 * indicate that it needs new processing, but must not be 63 * modified/encrypted again. 64 */ 65 memset(&info->control, 0, sizeof(info->control)); 66 67 info->control.jiffies = jiffies; 68 info->control.vif = &sta->sdata->vif; 69 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING | 70 IEEE80211_TX_INTFL_RETRANSMISSION; 71 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; 72 73 sta->status_stats.filtered++; 74 75 /* 76 * Clear more-data bit on filtered frames, it might be set 77 * but later frames might time out so it might have to be 78 * clear again ... It's all rather unlikely (this frame 79 * should time out first, right?) but let's not confuse 80 * peers unnecessarily. 81 */ 82 if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) 83 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); 84 85 if (ieee80211_is_data_qos(hdr->frame_control)) { 86 u8 *p = ieee80211_get_qos_ctl(hdr); 87 int tid = *p & IEEE80211_QOS_CTL_TID_MASK; 88 89 /* 90 * Clear EOSP if set, this could happen e.g. 91 * if an absence period (us being a P2P GO) 92 * shortens the SP. 93 */ 94 if (*p & IEEE80211_QOS_CTL_EOSP) 95 *p &= ~IEEE80211_QOS_CTL_EOSP; 96 ac = ieee80211_ac_from_tid(tid); 97 } else { 98 ac = IEEE80211_AC_BE; 99 } 100 101 /* 102 * Clear the TX filter mask for this STA when sending the next 103 * packet. If the STA went to power save mode, this will happen 104 * when it wakes up for the next time. 105 */ 106 set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT); 107 ieee80211_clear_fast_xmit(sta); 108 109 /* 110 * This code races in the following way: 111 * 112 * (1) STA sends frame indicating it will go to sleep and does so 113 * (2) hardware/firmware adds STA to filter list, passes frame up 114 * (3) hardware/firmware processes TX fifo and suppresses a frame 115 * (4) we get TX status before having processed the frame and 116 * knowing that the STA has gone to sleep. 117 * 118 * This is actually quite unlikely even when both those events are 119 * processed from interrupts coming in quickly after one another or 120 * even at the same time because we queue both TX status events and 121 * RX frames to be processed by a tasklet and process them in the 122 * same order that they were received or TX status last. Hence, there 123 * is no race as long as the frame RX is processed before the next TX 124 * status, which drivers can ensure, see below. 125 * 126 * Note that this can only happen if the hardware or firmware can 127 * actually add STAs to the filter list, if this is done by the 128 * driver in response to set_tim() (which will only reduce the race 129 * this whole filtering tries to solve, not completely solve it) 130 * this situation cannot happen. 131 * 132 * To completely solve this race drivers need to make sure that they 133 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing 134 * functions and 135 * (b) always process RX events before TX status events if ordering 136 * can be unknown, for example with different interrupt status 137 * bits. 138 * (c) if PS mode transitions are manual (i.e. the flag 139 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state 140 * changes before calling TX status events if ordering can be 141 * unknown. 142 */ 143 if (test_sta_flag(sta, WLAN_STA_PS_STA) && 144 skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { 145 skb_queue_tail(&sta->tx_filtered[ac], skb); 146 sta_info_recalc_tim(sta); 147 148 if (!timer_pending(&local->sta_cleanup)) 149 mod_timer(&local->sta_cleanup, 150 round_jiffies(jiffies + 151 STA_INFO_CLEANUP_INTERVAL)); 152 return; 153 } 154 155 if (!test_sta_flag(sta, WLAN_STA_PS_STA) && 156 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { 157 /* Software retry the packet once */ 158 info->flags |= IEEE80211_TX_INTFL_RETRIED; 159 ieee80211_add_pending_skb(local, skb); 160 return; 161 } 162 163 ps_dbg_ratelimited(sta->sdata, 164 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", 165 skb_queue_len(&sta->tx_filtered[ac]), 166 !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); 167 ieee80211_free_txskb(&local->hw, skb); 168 } 169 170 static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) 171 { 172 struct tid_ampdu_tx *tid_tx; 173 174 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 175 if (!tid_tx || !tid_tx->bar_pending) 176 return; 177 178 tid_tx->bar_pending = false; 179 ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn); 180 } 181 182 static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) 183 { 184 struct ieee80211_mgmt *mgmt = (void *) skb->data; 185 struct ieee80211_local *local = sta->local; 186 struct ieee80211_sub_if_data *sdata = sta->sdata; 187 struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb); 188 189 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 190 sta->status_stats.last_ack = jiffies; 191 if (txinfo->status.is_valid_ack_signal) { 192 sta->status_stats.last_ack_signal = 193 (s8)txinfo->status.ack_signal; 194 sta->status_stats.ack_signal_filled = true; 195 ewma_avg_signal_add(&sta->status_stats.avg_ack_signal, 196 -txinfo->status.ack_signal); 197 } 198 } 199 200 if (ieee80211_is_data_qos(mgmt->frame_control)) { 201 struct ieee80211_hdr *hdr = (void *) skb->data; 202 u8 *qc = ieee80211_get_qos_ctl(hdr); 203 u16 tid = qc[0] & 0xf; 204 205 ieee80211_check_pending_bar(sta, hdr->addr1, tid); 206 } 207 208 if (ieee80211_is_action(mgmt->frame_control) && 209 !ieee80211_has_protected(mgmt->frame_control) && 210 mgmt->u.action.category == WLAN_CATEGORY_HT && 211 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && 212 ieee80211_sdata_running(sdata)) { 213 enum ieee80211_smps_mode smps_mode; 214 215 switch (mgmt->u.action.u.ht_smps.smps_control) { 216 case WLAN_HT_SMPS_CONTROL_DYNAMIC: 217 smps_mode = IEEE80211_SMPS_DYNAMIC; 218 break; 219 case WLAN_HT_SMPS_CONTROL_STATIC: 220 smps_mode = IEEE80211_SMPS_STATIC; 221 break; 222 case WLAN_HT_SMPS_CONTROL_DISABLED: 223 default: /* shouldn't happen since we don't send that */ 224 smps_mode = IEEE80211_SMPS_OFF; 225 break; 226 } 227 228 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 229 /* 230 * This update looks racy, but isn't -- if we come 231 * here we've definitely got a station that we're 232 * talking to, and on a managed interface that can 233 * only be the AP. And the only other place updating 234 * this variable in managed mode is before association. 235 */ 236 sdata->smps_mode = smps_mode; 237 ieee80211_queue_work(&local->hw, &sdata->recalc_smps); 238 } else if (sdata->vif.type == NL80211_IFTYPE_AP || 239 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 240 sta->known_smps_mode = smps_mode; 241 } 242 } 243 } 244 245 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) 246 { 247 struct tid_ampdu_tx *tid_tx; 248 249 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 250 if (!tid_tx) 251 return; 252 253 tid_tx->failed_bar_ssn = ssn; 254 tid_tx->bar_pending = true; 255 } 256 257 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info, 258 struct ieee80211_tx_status *status) 259 { 260 int len = sizeof(struct ieee80211_radiotap_header); 261 262 /* IEEE80211_RADIOTAP_RATE rate */ 263 if (info->status.rates[0].idx >= 0 && 264 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | 265 IEEE80211_TX_RC_VHT_MCS))) 266 len += 2; 267 268 /* IEEE80211_RADIOTAP_TX_FLAGS */ 269 len += 2; 270 271 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 272 len += 1; 273 274 /* IEEE80211_RADIOTAP_MCS 275 * IEEE80211_RADIOTAP_VHT */ 276 if (status && status->rate) { 277 if (status->rate->flags & RATE_INFO_FLAGS_MCS) 278 len += 3; 279 else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS) 280 len = ALIGN(len, 2) + 12; 281 else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS) 282 len = ALIGN(len, 2) + 12; 283 } else if (info->status.rates[0].idx >= 0) { 284 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) 285 len += 3; 286 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) 287 len = ALIGN(len, 2) + 12; 288 } 289 290 return len; 291 } 292 293 static void 294 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, 295 struct ieee80211_supported_band *sband, 296 struct sk_buff *skb, int retry_count, 297 int rtap_len, int shift, 298 struct ieee80211_tx_status *status) 299 { 300 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 301 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 302 struct ieee80211_radiotap_header *rthdr; 303 unsigned char *pos; 304 u16 legacy_rate = 0; 305 u16 txflags; 306 307 rthdr = skb_push(skb, rtap_len); 308 309 memset(rthdr, 0, rtap_len); 310 rthdr->it_len = cpu_to_le16(rtap_len); 311 rthdr->it_present = 312 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | 313 (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); 314 pos = (unsigned char *)(rthdr + 1); 315 316 /* 317 * XXX: Once radiotap gets the bitmap reset thing the vendor 318 * extensions proposal contains, we can actually report 319 * the whole set of tries we did. 320 */ 321 322 /* IEEE80211_RADIOTAP_RATE */ 323 324 if (status && status->rate && !(status->rate->flags & 325 (RATE_INFO_FLAGS_MCS | 326 RATE_INFO_FLAGS_60G | 327 RATE_INFO_FLAGS_VHT_MCS | 328 RATE_INFO_FLAGS_HE_MCS))) 329 legacy_rate = status->rate->legacy; 330 else if (info->status.rates[0].idx >= 0 && 331 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | 332 IEEE80211_TX_RC_VHT_MCS))) 333 legacy_rate = 334 sband->bitrates[info->status.rates[0].idx].bitrate; 335 336 if (legacy_rate) { 337 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); 338 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift)); 339 /* padding for tx flags */ 340 pos += 2; 341 } 342 343 /* IEEE80211_RADIOTAP_TX_FLAGS */ 344 txflags = 0; 345 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 346 !is_multicast_ether_addr(hdr->addr1)) 347 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; 348 349 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 350 txflags |= IEEE80211_RADIOTAP_F_TX_CTS; 351 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) 352 txflags |= IEEE80211_RADIOTAP_F_TX_RTS; 353 354 put_unaligned_le16(txflags, pos); 355 pos += 2; 356 357 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 358 /* for now report the total retry_count */ 359 *pos = retry_count; 360 pos++; 361 362 if (status && status->rate && 363 (status->rate->flags & RATE_INFO_FLAGS_MCS)) { 364 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); 365 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 366 IEEE80211_RADIOTAP_MCS_HAVE_GI | 367 IEEE80211_RADIOTAP_MCS_HAVE_BW; 368 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI) 369 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 370 if (status->rate->bw == RATE_INFO_BW_40) 371 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 372 pos[2] = status->rate->mcs; 373 pos += 3; 374 } else if (status && status->rate && 375 (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) { 376 u16 known = local->hw.radiotap_vht_details & 377 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 378 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 379 380 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); 381 382 /* required alignment from rthdr */ 383 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 384 385 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 386 put_unaligned_le16(known, pos); 387 pos += 2; 388 389 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 390 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI) 391 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 392 pos++; 393 394 /* u8 bandwidth */ 395 switch (status->rate->bw) { 396 case RATE_INFO_BW_160: 397 *pos = 11; 398 break; 399 case RATE_INFO_BW_80: 400 *pos = 2; 401 break; 402 case RATE_INFO_BW_40: 403 *pos = 1; 404 break; 405 default: 406 *pos = 0; 407 break; 408 } 409 410 /* u8 mcs_nss[4] */ 411 *pos = (status->rate->mcs << 4) | status->rate->nss; 412 pos += 4; 413 414 /* u8 coding */ 415 pos++; 416 /* u8 group_id */ 417 pos++; 418 /* u16 partial_aid */ 419 pos += 2; 420 } else if (status && status->rate && 421 (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) { 422 struct ieee80211_radiotap_he *he; 423 424 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE); 425 426 /* required alignment from rthdr */ 427 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 428 he = (struct ieee80211_radiotap_he *)pos; 429 430 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU | 431 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 432 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 433 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 434 435 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN); 436 437 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f) 438 439 he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss); 440 441 #define CHECK_GI(s) \ 442 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \ 443 (int)NL80211_RATE_INFO_HE_GI_##s) 444 445 CHECK_GI(0_8); 446 CHECK_GI(1_6); 447 CHECK_GI(3_2); 448 449 he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs); 450 he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm); 451 452 he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi); 453 454 switch (status->rate->bw) { 455 case RATE_INFO_BW_20: 456 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 457 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ); 458 break; 459 case RATE_INFO_BW_40: 460 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 461 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ); 462 break; 463 case RATE_INFO_BW_80: 464 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 465 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ); 466 break; 467 case RATE_INFO_BW_160: 468 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 469 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ); 470 break; 471 case RATE_INFO_BW_HE_RU: 472 #define CHECK_RU_ALLOC(s) \ 473 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \ 474 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4) 475 476 CHECK_RU_ALLOC(26); 477 CHECK_RU_ALLOC(52); 478 CHECK_RU_ALLOC(106); 479 CHECK_RU_ALLOC(242); 480 CHECK_RU_ALLOC(484); 481 CHECK_RU_ALLOC(996); 482 CHECK_RU_ALLOC(2x996); 483 484 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 485 status->rate->he_ru_alloc + 4); 486 break; 487 default: 488 WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw); 489 } 490 491 pos += sizeof(struct ieee80211_radiotap_he); 492 } 493 494 if ((status && status->rate) || info->status.rates[0].idx < 0) 495 return; 496 497 /* IEEE80211_RADIOTAP_MCS 498 * IEEE80211_RADIOTAP_VHT */ 499 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { 500 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); 501 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 502 IEEE80211_RADIOTAP_MCS_HAVE_GI | 503 IEEE80211_RADIOTAP_MCS_HAVE_BW; 504 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 505 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 506 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 507 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 508 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) 509 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; 510 pos[2] = info->status.rates[0].idx; 511 pos += 3; 512 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { 513 u16 known = local->hw.radiotap_vht_details & 514 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 515 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 516 517 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); 518 519 /* required alignment from rthdr */ 520 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 521 522 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 523 put_unaligned_le16(known, pos); 524 pos += 2; 525 526 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 527 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 528 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 529 pos++; 530 531 /* u8 bandwidth */ 532 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 533 *pos = 1; 534 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 535 *pos = 4; 536 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 537 *pos = 11; 538 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ 539 *pos = 0; 540 pos++; 541 542 /* u8 mcs_nss[4] */ 543 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | 544 ieee80211_rate_get_vht_nss(&info->status.rates[0]); 545 pos += 4; 546 547 /* u8 coding */ 548 pos++; 549 /* u8 group_id */ 550 pos++; 551 /* u16 partial_aid */ 552 pos += 2; 553 } 554 } 555 556 /* 557 * Handles the tx for TDLS teardown frames. 558 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP 559 */ 560 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, 561 struct ieee80211_sub_if_data *sdata, 562 struct sk_buff *skb, u32 flags) 563 { 564 struct sk_buff *teardown_skb; 565 struct sk_buff *orig_teardown_skb; 566 bool is_teardown = false; 567 568 /* Get the teardown data we need and free the lock */ 569 spin_lock(&sdata->u.mgd.teardown_lock); 570 teardown_skb = sdata->u.mgd.teardown_skb; 571 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; 572 if ((skb == orig_teardown_skb) && teardown_skb) { 573 sdata->u.mgd.teardown_skb = NULL; 574 sdata->u.mgd.orig_teardown_skb = NULL; 575 is_teardown = true; 576 } 577 spin_unlock(&sdata->u.mgd.teardown_lock); 578 579 if (is_teardown) { 580 /* This mechanism relies on being able to get ACKs */ 581 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); 582 583 /* Check if peer has ACKed */ 584 if (flags & IEEE80211_TX_STAT_ACK) { 585 dev_kfree_skb_any(teardown_skb); 586 } else { 587 tdls_dbg(sdata, 588 "TDLS Resending teardown through AP\n"); 589 590 ieee80211_subif_start_xmit(teardown_skb, skb->dev); 591 } 592 } 593 } 594 595 static struct ieee80211_sub_if_data * 596 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) 597 { 598 struct ieee80211_sub_if_data *sdata; 599 600 if (skb->dev) { 601 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 602 if (!sdata->dev) 603 continue; 604 605 if (skb->dev == sdata->dev) 606 return sdata; 607 } 608 609 return NULL; 610 } 611 612 return rcu_dereference(local->p2p_sdata); 613 } 614 615 static void ieee80211_report_ack_skb(struct ieee80211_local *local, 616 struct ieee80211_tx_info *info, 617 bool acked, bool dropped) 618 { 619 struct sk_buff *skb; 620 unsigned long flags; 621 622 spin_lock_irqsave(&local->ack_status_lock, flags); 623 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id); 624 spin_unlock_irqrestore(&local->ack_status_lock, flags); 625 626 if (!skb) 627 return; 628 629 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { 630 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; 631 struct ieee80211_sub_if_data *sdata; 632 struct ieee80211_hdr *hdr = (void *)skb->data; 633 634 rcu_read_lock(); 635 sdata = ieee80211_sdata_from_skb(local, skb); 636 if (sdata) { 637 if (ieee80211_is_nullfunc(hdr->frame_control) || 638 ieee80211_is_qos_nullfunc(hdr->frame_control)) 639 cfg80211_probe_status(sdata->dev, hdr->addr1, 640 cookie, acked, 641 info->status.ack_signal, 642 info->status.is_valid_ack_signal, 643 GFP_ATOMIC); 644 else 645 cfg80211_mgmt_tx_status(&sdata->wdev, cookie, 646 skb->data, skb->len, 647 acked, GFP_ATOMIC); 648 } 649 rcu_read_unlock(); 650 651 dev_kfree_skb_any(skb); 652 } else if (dropped) { 653 dev_kfree_skb_any(skb); 654 } else { 655 /* consumes skb */ 656 skb_complete_wifi_ack(skb, acked); 657 } 658 } 659 660 static void ieee80211_report_used_skb(struct ieee80211_local *local, 661 struct sk_buff *skb, bool dropped) 662 { 663 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 664 struct ieee80211_hdr *hdr = (void *)skb->data; 665 bool acked = info->flags & IEEE80211_TX_STAT_ACK; 666 667 if (dropped) 668 acked = false; 669 670 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { 671 struct ieee80211_sub_if_data *sdata; 672 673 rcu_read_lock(); 674 675 sdata = ieee80211_sdata_from_skb(local, skb); 676 677 if (!sdata) { 678 skb->dev = NULL; 679 } else { 680 unsigned int hdr_size = 681 ieee80211_hdrlen(hdr->frame_control); 682 683 /* Check to see if packet is a TDLS teardown packet */ 684 if (ieee80211_is_data(hdr->frame_control) && 685 (ieee80211_get_tdls_action(skb, hdr_size) == 686 WLAN_TDLS_TEARDOWN)) 687 ieee80211_tdls_td_tx_handle(local, sdata, skb, 688 info->flags); 689 else 690 ieee80211_mgd_conn_tx_status(sdata, 691 hdr->frame_control, 692 acked); 693 } 694 695 rcu_read_unlock(); 696 } else if (info->ack_frame_id) { 697 ieee80211_report_ack_skb(local, info, acked, dropped); 698 } 699 700 if (!dropped && skb->destructor) { 701 skb->wifi_acked_valid = 1; 702 skb->wifi_acked = acked; 703 } 704 705 ieee80211_led_tx(local); 706 707 if (skb_has_frag_list(skb)) { 708 kfree_skb_list(skb_shinfo(skb)->frag_list); 709 skb_shinfo(skb)->frag_list = NULL; 710 } 711 } 712 713 /* 714 * Use a static threshold for now, best value to be determined 715 * by testing ... 716 * Should it depend on: 717 * - on # of retransmissions 718 * - current throughput (higher value for higher tpt)? 719 */ 720 #define STA_LOST_PKT_THRESHOLD 50 721 #define STA_LOST_TDLS_PKT_THRESHOLD 10 722 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ 723 724 static void ieee80211_lost_packet(struct sta_info *sta, 725 struct ieee80211_tx_info *info) 726 { 727 /* If driver relies on its own algorithm for station kickout, skip 728 * mac80211 packet loss mechanism. 729 */ 730 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) 731 return; 732 733 /* This packet was aggregated but doesn't carry status info */ 734 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 735 !(info->flags & IEEE80211_TX_STAT_AMPDU)) 736 return; 737 738 sta->status_stats.lost_packets++; 739 if (!sta->sta.tdls && 740 sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD) 741 return; 742 743 /* 744 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD 745 * of the last packets were lost, and that no ACK was received in the 746 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss 747 * mechanism. 748 */ 749 if (sta->sta.tdls && 750 (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD || 751 time_before(jiffies, 752 sta->status_stats.last_tdls_pkt_time + 753 STA_LOST_TDLS_PKT_TIME))) 754 return; 755 756 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 757 sta->status_stats.lost_packets, GFP_ATOMIC); 758 sta->status_stats.lost_packets = 0; 759 } 760 761 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 762 struct ieee80211_tx_info *info, 763 int *retry_count) 764 { 765 int rates_idx = -1; 766 int count = -1; 767 int i; 768 769 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 770 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 771 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 772 /* just the first aggr frame carry status info */ 773 info->status.rates[i].idx = -1; 774 info->status.rates[i].count = 0; 775 break; 776 } else if (info->status.rates[i].idx < 0) { 777 break; 778 } else if (i >= hw->max_report_rates) { 779 /* the HW cannot have attempted that rate */ 780 info->status.rates[i].idx = -1; 781 info->status.rates[i].count = 0; 782 break; 783 } 784 785 count += info->status.rates[i].count; 786 } 787 rates_idx = i - 1; 788 789 if (count < 0) 790 count = 0; 791 792 *retry_count = count; 793 return rates_idx; 794 } 795 796 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 797 struct ieee80211_supported_band *sband, 798 int retry_count, int shift, bool send_to_cooked, 799 struct ieee80211_tx_status *status) 800 { 801 struct sk_buff *skb2; 802 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 803 struct ieee80211_sub_if_data *sdata; 804 struct net_device *prev_dev = NULL; 805 int rtap_len; 806 807 /* send frame to monitor interfaces now */ 808 rtap_len = ieee80211_tx_radiotap_len(info, status); 809 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 810 pr_err("ieee80211_tx_status: headroom too small\n"); 811 dev_kfree_skb(skb); 812 return; 813 } 814 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, 815 rtap_len, shift, status); 816 817 /* XXX: is this sufficient for BPF? */ 818 skb_reset_mac_header(skb); 819 skb->ip_summed = CHECKSUM_UNNECESSARY; 820 skb->pkt_type = PACKET_OTHERHOST; 821 skb->protocol = htons(ETH_P_802_2); 822 memset(skb->cb, 0, sizeof(skb->cb)); 823 824 rcu_read_lock(); 825 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 826 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 827 if (!ieee80211_sdata_running(sdata)) 828 continue; 829 830 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && 831 !send_to_cooked) 832 continue; 833 834 if (prev_dev) { 835 skb2 = skb_clone(skb, GFP_ATOMIC); 836 if (skb2) { 837 skb2->dev = prev_dev; 838 netif_rx(skb2); 839 } 840 } 841 842 prev_dev = sdata->dev; 843 } 844 } 845 if (prev_dev) { 846 skb->dev = prev_dev; 847 netif_rx(skb); 848 skb = NULL; 849 } 850 rcu_read_unlock(); 851 dev_kfree_skb(skb); 852 } 853 854 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 855 struct ieee80211_tx_status *status) 856 { 857 struct sk_buff *skb = status->skb; 858 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 859 struct ieee80211_local *local = hw_to_local(hw); 860 struct ieee80211_tx_info *info = status->info; 861 struct sta_info *sta; 862 __le16 fc; 863 struct ieee80211_supported_band *sband; 864 int retry_count; 865 int rates_idx; 866 bool send_to_cooked; 867 bool acked; 868 struct ieee80211_bar *bar; 869 int shift = 0; 870 int tid = IEEE80211_NUM_TIDS; 871 872 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 873 874 sband = local->hw.wiphy->bands[info->band]; 875 fc = hdr->frame_control; 876 877 if (status->sta) { 878 sta = container_of(status->sta, struct sta_info, sta); 879 shift = ieee80211_vif_get_shift(&sta->sdata->vif); 880 881 if (info->flags & IEEE80211_TX_STATUS_EOSP) 882 clear_sta_flag(sta, WLAN_STA_SP); 883 884 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 885 886 /* mesh Peer Service Period support */ 887 if (ieee80211_vif_is_mesh(&sta->sdata->vif) && 888 ieee80211_is_data_qos(fc)) 889 ieee80211_mpsp_trigger_process( 890 ieee80211_get_qos_ctl(hdr), sta, true, acked); 891 892 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { 893 /* 894 * The STA is in power save mode, so assume 895 * that this TX packet failed because of that. 896 */ 897 ieee80211_handle_filtered_frame(local, sta, skb); 898 return; 899 } 900 901 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && 902 (ieee80211_is_data(hdr->frame_control)) && 903 (rates_idx != -1)) 904 sta->tx_stats.last_rate = 905 info->status.rates[rates_idx]; 906 907 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 908 (ieee80211_is_data_qos(fc))) { 909 u16 ssn; 910 u8 *qc; 911 912 qc = ieee80211_get_qos_ctl(hdr); 913 tid = qc[0] & 0xf; 914 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 915 & IEEE80211_SCTL_SEQ); 916 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, 917 tid, ssn); 918 } else if (ieee80211_is_data_qos(fc)) { 919 u8 *qc = ieee80211_get_qos_ctl(hdr); 920 921 tid = qc[0] & 0xf; 922 } 923 924 if (!acked && ieee80211_is_back_req(fc)) { 925 u16 control; 926 927 /* 928 * BAR failed, store the last SSN and retry sending 929 * the BAR when the next unicast transmission on the 930 * same TID succeeds. 931 */ 932 bar = (struct ieee80211_bar *) skb->data; 933 control = le16_to_cpu(bar->control); 934 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { 935 u16 ssn = le16_to_cpu(bar->start_seq_num); 936 937 tid = (control & 938 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 939 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 940 941 ieee80211_set_bar_pending(sta, tid, ssn); 942 } 943 } 944 945 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 946 ieee80211_handle_filtered_frame(local, sta, skb); 947 return; 948 } else { 949 if (!acked) 950 sta->status_stats.retry_failed++; 951 sta->status_stats.retry_count += retry_count; 952 953 if (ieee80211_is_data_present(fc)) { 954 if (!acked) 955 sta->status_stats.msdu_failed[tid]++; 956 957 sta->status_stats.msdu_retries[tid] += 958 retry_count; 959 } 960 } 961 962 rate_control_tx_status(local, sband, status); 963 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 964 ieee80211s_update_metric(local, sta, status); 965 966 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) 967 ieee80211_frame_acked(sta, skb); 968 969 if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && 970 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 971 ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, 972 acked, info->status.tx_time); 973 974 if (info->status.tx_time && 975 wiphy_ext_feature_isset(local->hw.wiphy, 976 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS)) 977 ieee80211_sta_register_airtime(&sta->sta, tid, 978 info->status.tx_time, 0); 979 980 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 981 if (info->flags & IEEE80211_TX_STAT_ACK) { 982 if (sta->status_stats.lost_packets) 983 sta->status_stats.lost_packets = 0; 984 985 /* Track when last TDLS packet was ACKed */ 986 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 987 sta->status_stats.last_tdls_pkt_time = 988 jiffies; 989 } else { 990 ieee80211_lost_packet(sta, info); 991 } 992 } 993 } 994 995 /* SNMP counters 996 * Fragments are passed to low-level drivers as separate skbs, so these 997 * are actually fragments, not frames. Update frame counters only for 998 * the first fragment of the frame. */ 999 if ((info->flags & IEEE80211_TX_STAT_ACK) || 1000 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 1001 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 1002 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1003 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 1004 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1005 if (retry_count > 0) 1006 I802_DEBUG_INC(local->dot11RetryCount); 1007 if (retry_count > 1) 1008 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1009 } 1010 1011 /* This counter shall be incremented for an acknowledged MPDU 1012 * with an individual address in the address 1 field or an MPDU 1013 * with a multicast address in the address 1 field of type Data 1014 * or Management. */ 1015 if (!is_multicast_ether_addr(hdr->addr1) || 1016 ieee80211_is_data(fc) || 1017 ieee80211_is_mgmt(fc)) 1018 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1019 } else { 1020 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1021 I802_DEBUG_INC(local->dot11FailedCount); 1022 } 1023 1024 if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && 1025 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1026 !(info->flags & IEEE80211_TX_CTL_INJECTED) && 1027 local->ps_sdata && !(local->scanning)) { 1028 if (info->flags & IEEE80211_TX_STAT_ACK) { 1029 local->ps_sdata->u.mgd.flags |= 1030 IEEE80211_STA_NULLFUNC_ACKED; 1031 } else 1032 mod_timer(&local->dynamic_ps_timer, jiffies + 1033 msecs_to_jiffies(10)); 1034 } 1035 1036 ieee80211_report_used_skb(local, skb, false); 1037 1038 /* this was a transmitted frame, but now we want to reuse it */ 1039 skb_orphan(skb); 1040 1041 /* Need to make a copy before skb->cb gets cleared */ 1042 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || 1043 !(ieee80211_is_data(fc)); 1044 1045 /* 1046 * This is a bit racy but we can avoid a lot of work 1047 * with this test... 1048 */ 1049 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { 1050 dev_kfree_skb(skb); 1051 return; 1052 } 1053 1054 /* send to monitor interfaces */ 1055 ieee80211_tx_monitor(local, skb, sband, retry_count, shift, 1056 send_to_cooked, status); 1057 } 1058 1059 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1060 { 1061 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1062 struct ieee80211_local *local = hw_to_local(hw); 1063 struct ieee80211_tx_status status = { 1064 .skb = skb, 1065 .info = IEEE80211_SKB_CB(skb), 1066 }; 1067 struct rhlist_head *tmp; 1068 struct sta_info *sta; 1069 1070 rcu_read_lock(); 1071 1072 for_each_sta_info(local, hdr->addr1, sta, tmp) { 1073 /* skip wrong virtual interface */ 1074 if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr)) 1075 continue; 1076 1077 status.sta = &sta->sta; 1078 break; 1079 } 1080 1081 __ieee80211_tx_status(hw, &status); 1082 rcu_read_unlock(); 1083 } 1084 EXPORT_SYMBOL(ieee80211_tx_status); 1085 1086 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1087 struct ieee80211_tx_status *status) 1088 { 1089 struct ieee80211_local *local = hw_to_local(hw); 1090 struct ieee80211_tx_info *info = status->info; 1091 struct ieee80211_sta *pubsta = status->sta; 1092 struct ieee80211_supported_band *sband; 1093 int retry_count; 1094 bool acked, noack_success; 1095 1096 if (status->skb) 1097 return __ieee80211_tx_status(hw, status); 1098 1099 if (!status->sta) 1100 return; 1101 1102 ieee80211_tx_get_rates(hw, info, &retry_count); 1103 1104 sband = hw->wiphy->bands[info->band]; 1105 1106 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1107 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1108 1109 if (pubsta) { 1110 struct sta_info *sta; 1111 1112 sta = container_of(pubsta, struct sta_info, sta); 1113 1114 if (!acked) 1115 sta->status_stats.retry_failed++; 1116 sta->status_stats.retry_count += retry_count; 1117 1118 if (acked) { 1119 sta->status_stats.last_ack = jiffies; 1120 1121 if (sta->status_stats.lost_packets) 1122 sta->status_stats.lost_packets = 0; 1123 1124 /* Track when last TDLS packet was ACKed */ 1125 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 1126 sta->status_stats.last_tdls_pkt_time = jiffies; 1127 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1128 return; 1129 } else { 1130 ieee80211_lost_packet(sta, info); 1131 } 1132 1133 rate_control_tx_status(local, sband, status); 1134 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1135 ieee80211s_update_metric(local, sta, status); 1136 } 1137 1138 if (acked || noack_success) { 1139 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1140 if (!pubsta) 1141 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1142 if (retry_count > 0) 1143 I802_DEBUG_INC(local->dot11RetryCount); 1144 if (retry_count > 1) 1145 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1146 } else { 1147 I802_DEBUG_INC(local->dot11FailedCount); 1148 } 1149 } 1150 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1151 1152 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1153 struct ieee80211_sta *pubsta, 1154 struct ieee80211_tx_info *info) 1155 { 1156 struct ieee80211_local *local = hw_to_local(hw); 1157 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band]; 1158 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1159 struct ieee80211_tx_status status = { 1160 .info = info, 1161 .sta = pubsta, 1162 }; 1163 1164 rate_control_tx_status(local, sband, &status); 1165 1166 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1167 sta->tx_stats.last_rate = info->status.rates[0]; 1168 } 1169 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1170 1171 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1172 { 1173 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1174 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1175 num_packets, GFP_ATOMIC); 1176 } 1177 EXPORT_SYMBOL(ieee80211_report_low_ack); 1178 1179 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1180 { 1181 struct ieee80211_local *local = hw_to_local(hw); 1182 1183 ieee80211_report_used_skb(local, skb, true); 1184 dev_kfree_skb_any(skb); 1185 } 1186 EXPORT_SYMBOL(ieee80211_free_txskb); 1187 1188 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1189 struct sk_buff_head *skbs) 1190 { 1191 struct sk_buff *skb; 1192 1193 while ((skb = __skb_dequeue(skbs))) 1194 ieee80211_free_txskb(hw, skb); 1195 } 1196