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 (status && status->rate && !(status->rate->flags & 264 (RATE_INFO_FLAGS_MCS | 265 RATE_INFO_FLAGS_DMG | 266 RATE_INFO_FLAGS_EDMG | 267 RATE_INFO_FLAGS_VHT_MCS | 268 RATE_INFO_FLAGS_HE_MCS))) 269 len += 2; 270 else if (info->status.rates[0].idx >= 0 && 271 !(info->status.rates[0].flags & 272 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))) 273 len += 2; 274 275 /* IEEE80211_RADIOTAP_TX_FLAGS */ 276 len += 2; 277 278 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 279 len += 1; 280 281 /* IEEE80211_RADIOTAP_MCS 282 * IEEE80211_RADIOTAP_VHT */ 283 if (status && status->rate) { 284 if (status->rate->flags & RATE_INFO_FLAGS_MCS) 285 len += 3; 286 else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS) 287 len = ALIGN(len, 2) + 12; 288 else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS) 289 len = ALIGN(len, 2) + 12; 290 } else if (info->status.rates[0].idx >= 0) { 291 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) 292 len += 3; 293 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) 294 len = ALIGN(len, 2) + 12; 295 } 296 297 return len; 298 } 299 300 static void 301 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, 302 struct ieee80211_supported_band *sband, 303 struct sk_buff *skb, int retry_count, 304 int rtap_len, int shift, 305 struct ieee80211_tx_status *status) 306 { 307 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 308 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 309 struct ieee80211_radiotap_header *rthdr; 310 unsigned char *pos; 311 u16 legacy_rate = 0; 312 u16 txflags; 313 314 rthdr = skb_push(skb, rtap_len); 315 316 memset(rthdr, 0, rtap_len); 317 rthdr->it_len = cpu_to_le16(rtap_len); 318 rthdr->it_present = 319 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | 320 (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); 321 pos = (unsigned char *)(rthdr + 1); 322 323 /* 324 * XXX: Once radiotap gets the bitmap reset thing the vendor 325 * extensions proposal contains, we can actually report 326 * the whole set of tries we did. 327 */ 328 329 /* IEEE80211_RADIOTAP_RATE */ 330 331 if (status && status->rate) { 332 if (!(status->rate->flags & (RATE_INFO_FLAGS_MCS | 333 RATE_INFO_FLAGS_DMG | 334 RATE_INFO_FLAGS_EDMG | 335 RATE_INFO_FLAGS_VHT_MCS | 336 RATE_INFO_FLAGS_HE_MCS))) 337 legacy_rate = status->rate->legacy; 338 } else if (info->status.rates[0].idx >= 0 && 339 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | 340 IEEE80211_TX_RC_VHT_MCS))) 341 legacy_rate = 342 sband->bitrates[info->status.rates[0].idx].bitrate; 343 344 if (legacy_rate) { 345 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); 346 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift)); 347 /* padding for tx flags */ 348 pos += 2; 349 } 350 351 /* IEEE80211_RADIOTAP_TX_FLAGS */ 352 txflags = 0; 353 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 354 !is_multicast_ether_addr(hdr->addr1)) 355 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; 356 357 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 358 txflags |= IEEE80211_RADIOTAP_F_TX_CTS; 359 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) 360 txflags |= IEEE80211_RADIOTAP_F_TX_RTS; 361 362 put_unaligned_le16(txflags, pos); 363 pos += 2; 364 365 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 366 /* for now report the total retry_count */ 367 *pos = retry_count; 368 pos++; 369 370 if (status && status->rate && 371 (status->rate->flags & RATE_INFO_FLAGS_MCS)) { 372 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); 373 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 374 IEEE80211_RADIOTAP_MCS_HAVE_GI | 375 IEEE80211_RADIOTAP_MCS_HAVE_BW; 376 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI) 377 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 378 if (status->rate->bw == RATE_INFO_BW_40) 379 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 380 pos[2] = status->rate->mcs; 381 pos += 3; 382 } else if (status && status->rate && 383 (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) { 384 u16 known = local->hw.radiotap_vht_details & 385 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 386 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 387 388 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); 389 390 /* required alignment from rthdr */ 391 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 392 393 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 394 put_unaligned_le16(known, pos); 395 pos += 2; 396 397 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 398 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI) 399 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 400 pos++; 401 402 /* u8 bandwidth */ 403 switch (status->rate->bw) { 404 case RATE_INFO_BW_160: 405 *pos = 11; 406 break; 407 case RATE_INFO_BW_80: 408 *pos = 4; 409 break; 410 case RATE_INFO_BW_40: 411 *pos = 1; 412 break; 413 default: 414 *pos = 0; 415 break; 416 } 417 pos++; 418 419 /* u8 mcs_nss[4] */ 420 *pos = (status->rate->mcs << 4) | status->rate->nss; 421 pos += 4; 422 423 /* u8 coding */ 424 pos++; 425 /* u8 group_id */ 426 pos++; 427 /* u16 partial_aid */ 428 pos += 2; 429 } else if (status && status->rate && 430 (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) { 431 struct ieee80211_radiotap_he *he; 432 433 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE); 434 435 /* required alignment from rthdr */ 436 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 437 he = (struct ieee80211_radiotap_he *)pos; 438 439 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU | 440 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 441 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 442 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 443 444 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN); 445 446 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f) 447 448 he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss); 449 450 #define CHECK_GI(s) \ 451 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \ 452 (int)NL80211_RATE_INFO_HE_GI_##s) 453 454 CHECK_GI(0_8); 455 CHECK_GI(1_6); 456 CHECK_GI(3_2); 457 458 he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs); 459 he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm); 460 461 he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi); 462 463 switch (status->rate->bw) { 464 case RATE_INFO_BW_20: 465 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 466 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ); 467 break; 468 case RATE_INFO_BW_40: 469 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 470 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ); 471 break; 472 case RATE_INFO_BW_80: 473 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 474 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ); 475 break; 476 case RATE_INFO_BW_160: 477 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 478 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ); 479 break; 480 case RATE_INFO_BW_HE_RU: 481 #define CHECK_RU_ALLOC(s) \ 482 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \ 483 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4) 484 485 CHECK_RU_ALLOC(26); 486 CHECK_RU_ALLOC(52); 487 CHECK_RU_ALLOC(106); 488 CHECK_RU_ALLOC(242); 489 CHECK_RU_ALLOC(484); 490 CHECK_RU_ALLOC(996); 491 CHECK_RU_ALLOC(2x996); 492 493 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 494 status->rate->he_ru_alloc + 4); 495 break; 496 default: 497 WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw); 498 } 499 500 pos += sizeof(struct ieee80211_radiotap_he); 501 } 502 503 if ((status && status->rate) || info->status.rates[0].idx < 0) 504 return; 505 506 /* IEEE80211_RADIOTAP_MCS 507 * IEEE80211_RADIOTAP_VHT */ 508 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { 509 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); 510 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 511 IEEE80211_RADIOTAP_MCS_HAVE_GI | 512 IEEE80211_RADIOTAP_MCS_HAVE_BW; 513 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 514 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 515 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 516 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 517 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) 518 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; 519 pos[2] = info->status.rates[0].idx; 520 pos += 3; 521 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { 522 u16 known = local->hw.radiotap_vht_details & 523 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 524 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 525 526 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); 527 528 /* required alignment from rthdr */ 529 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 530 531 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 532 put_unaligned_le16(known, pos); 533 pos += 2; 534 535 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 536 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 537 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 538 pos++; 539 540 /* u8 bandwidth */ 541 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 542 *pos = 1; 543 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 544 *pos = 4; 545 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 546 *pos = 11; 547 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ 548 *pos = 0; 549 pos++; 550 551 /* u8 mcs_nss[4] */ 552 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | 553 ieee80211_rate_get_vht_nss(&info->status.rates[0]); 554 pos += 4; 555 556 /* u8 coding */ 557 pos++; 558 /* u8 group_id */ 559 pos++; 560 /* u16 partial_aid */ 561 pos += 2; 562 } 563 } 564 565 /* 566 * Handles the tx for TDLS teardown frames. 567 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP 568 */ 569 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, 570 struct ieee80211_sub_if_data *sdata, 571 struct sk_buff *skb, u32 flags) 572 { 573 struct sk_buff *teardown_skb; 574 struct sk_buff *orig_teardown_skb; 575 bool is_teardown = false; 576 577 /* Get the teardown data we need and free the lock */ 578 spin_lock(&sdata->u.mgd.teardown_lock); 579 teardown_skb = sdata->u.mgd.teardown_skb; 580 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; 581 if ((skb == orig_teardown_skb) && teardown_skb) { 582 sdata->u.mgd.teardown_skb = NULL; 583 sdata->u.mgd.orig_teardown_skb = NULL; 584 is_teardown = true; 585 } 586 spin_unlock(&sdata->u.mgd.teardown_lock); 587 588 if (is_teardown) { 589 /* This mechanism relies on being able to get ACKs */ 590 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); 591 592 /* Check if peer has ACKed */ 593 if (flags & IEEE80211_TX_STAT_ACK) { 594 dev_kfree_skb_any(teardown_skb); 595 } else { 596 tdls_dbg(sdata, 597 "TDLS Resending teardown through AP\n"); 598 599 ieee80211_subif_start_xmit(teardown_skb, skb->dev); 600 } 601 } 602 } 603 604 static struct ieee80211_sub_if_data * 605 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) 606 { 607 struct ieee80211_sub_if_data *sdata; 608 609 if (skb->dev) { 610 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 611 if (!sdata->dev) 612 continue; 613 614 if (skb->dev == sdata->dev) 615 return sdata; 616 } 617 618 return NULL; 619 } 620 621 return rcu_dereference(local->p2p_sdata); 622 } 623 624 static void ieee80211_report_ack_skb(struct ieee80211_local *local, 625 struct ieee80211_tx_info *info, 626 bool acked, bool dropped) 627 { 628 struct sk_buff *skb; 629 unsigned long flags; 630 631 spin_lock_irqsave(&local->ack_status_lock, flags); 632 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id); 633 spin_unlock_irqrestore(&local->ack_status_lock, flags); 634 635 if (!skb) 636 return; 637 638 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { 639 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; 640 struct ieee80211_sub_if_data *sdata; 641 struct ieee80211_hdr *hdr = (void *)skb->data; 642 __be16 ethertype = 0; 643 644 if (skb->len >= ETH_HLEN && skb->protocol == cpu_to_be16(ETH_P_802_3)) 645 skb_copy_bits(skb, 2 * ETH_ALEN, ðertype, ETH_TLEN); 646 647 rcu_read_lock(); 648 sdata = ieee80211_sdata_from_skb(local, skb); 649 if (sdata) { 650 if (ethertype == sdata->control_port_protocol || 651 ethertype == cpu_to_be16(ETH_P_PREAUTH)) 652 cfg80211_control_port_tx_status(&sdata->wdev, 653 cookie, 654 skb->data, 655 skb->len, 656 acked, 657 GFP_ATOMIC); 658 else if (ieee80211_is_any_nullfunc(hdr->frame_control)) 659 cfg80211_probe_status(sdata->dev, hdr->addr1, 660 cookie, acked, 661 info->status.ack_signal, 662 info->status.is_valid_ack_signal, 663 GFP_ATOMIC); 664 else if (ieee80211_is_mgmt(hdr->frame_control)) 665 cfg80211_mgmt_tx_status(&sdata->wdev, cookie, 666 skb->data, skb->len, 667 acked, GFP_ATOMIC); 668 else 669 pr_warn("Unknown status report in ack skb\n"); 670 671 } 672 rcu_read_unlock(); 673 674 dev_kfree_skb_any(skb); 675 } else if (dropped) { 676 dev_kfree_skb_any(skb); 677 } else { 678 /* consumes skb */ 679 skb_complete_wifi_ack(skb, acked); 680 } 681 } 682 683 static void ieee80211_report_used_skb(struct ieee80211_local *local, 684 struct sk_buff *skb, bool dropped) 685 { 686 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 687 u16 tx_time_est = ieee80211_info_get_tx_time_est(info); 688 struct ieee80211_hdr *hdr = (void *)skb->data; 689 bool acked = info->flags & IEEE80211_TX_STAT_ACK; 690 691 if (dropped) 692 acked = false; 693 694 if (tx_time_est) { 695 struct sta_info *sta; 696 697 rcu_read_lock(); 698 699 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 700 ieee80211_sta_update_pending_airtime(local, sta, 701 skb_get_queue_mapping(skb), 702 tx_time_est, 703 true); 704 rcu_read_unlock(); 705 } 706 707 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { 708 struct ieee80211_sub_if_data *sdata; 709 710 rcu_read_lock(); 711 712 sdata = ieee80211_sdata_from_skb(local, skb); 713 714 if (!sdata) { 715 skb->dev = NULL; 716 } else { 717 unsigned int hdr_size = 718 ieee80211_hdrlen(hdr->frame_control); 719 720 /* Check to see if packet is a TDLS teardown packet */ 721 if (ieee80211_is_data(hdr->frame_control) && 722 (ieee80211_get_tdls_action(skb, hdr_size) == 723 WLAN_TDLS_TEARDOWN)) 724 ieee80211_tdls_td_tx_handle(local, sdata, skb, 725 info->flags); 726 else 727 ieee80211_mgd_conn_tx_status(sdata, 728 hdr->frame_control, 729 acked); 730 } 731 732 rcu_read_unlock(); 733 } else if (info->ack_frame_id) { 734 ieee80211_report_ack_skb(local, info, acked, dropped); 735 } 736 737 if (!dropped && skb->destructor) { 738 skb->wifi_acked_valid = 1; 739 skb->wifi_acked = acked; 740 } 741 742 ieee80211_led_tx(local); 743 744 if (skb_has_frag_list(skb)) { 745 kfree_skb_list(skb_shinfo(skb)->frag_list); 746 skb_shinfo(skb)->frag_list = NULL; 747 } 748 } 749 750 /* 751 * Use a static threshold for now, best value to be determined 752 * by testing ... 753 * Should it depend on: 754 * - on # of retransmissions 755 * - current throughput (higher value for higher tpt)? 756 */ 757 #define STA_LOST_PKT_THRESHOLD 50 758 #define STA_LOST_TDLS_PKT_THRESHOLD 10 759 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ 760 761 static void ieee80211_lost_packet(struct sta_info *sta, 762 struct ieee80211_tx_info *info) 763 { 764 /* If driver relies on its own algorithm for station kickout, skip 765 * mac80211 packet loss mechanism. 766 */ 767 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) 768 return; 769 770 /* This packet was aggregated but doesn't carry status info */ 771 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 772 !(info->flags & IEEE80211_TX_STAT_AMPDU)) 773 return; 774 775 sta->status_stats.lost_packets++; 776 if (!sta->sta.tdls && 777 sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD) 778 return; 779 780 /* 781 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD 782 * of the last packets were lost, and that no ACK was received in the 783 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss 784 * mechanism. 785 */ 786 if (sta->sta.tdls && 787 (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD || 788 time_before(jiffies, 789 sta->status_stats.last_tdls_pkt_time + 790 STA_LOST_TDLS_PKT_TIME))) 791 return; 792 793 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 794 sta->status_stats.lost_packets, GFP_ATOMIC); 795 sta->status_stats.lost_packets = 0; 796 } 797 798 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 799 struct ieee80211_tx_info *info, 800 int *retry_count) 801 { 802 int rates_idx = -1; 803 int count = -1; 804 int i; 805 806 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 807 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 808 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 809 /* just the first aggr frame carry status info */ 810 info->status.rates[i].idx = -1; 811 info->status.rates[i].count = 0; 812 break; 813 } else if (info->status.rates[i].idx < 0) { 814 break; 815 } else if (i >= hw->max_report_rates) { 816 /* the HW cannot have attempted that rate */ 817 info->status.rates[i].idx = -1; 818 info->status.rates[i].count = 0; 819 break; 820 } 821 822 count += info->status.rates[i].count; 823 } 824 rates_idx = i - 1; 825 826 if (count < 0) 827 count = 0; 828 829 *retry_count = count; 830 return rates_idx; 831 } 832 833 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 834 struct ieee80211_supported_band *sband, 835 int retry_count, int shift, bool send_to_cooked, 836 struct ieee80211_tx_status *status) 837 { 838 struct sk_buff *skb2; 839 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 840 struct ieee80211_sub_if_data *sdata; 841 struct net_device *prev_dev = NULL; 842 int rtap_len; 843 844 /* send frame to monitor interfaces now */ 845 rtap_len = ieee80211_tx_radiotap_len(info, status); 846 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 847 pr_err("ieee80211_tx_status: headroom too small\n"); 848 dev_kfree_skb(skb); 849 return; 850 } 851 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, 852 rtap_len, shift, status); 853 854 /* XXX: is this sufficient for BPF? */ 855 skb_reset_mac_header(skb); 856 skb->ip_summed = CHECKSUM_UNNECESSARY; 857 skb->pkt_type = PACKET_OTHERHOST; 858 skb->protocol = htons(ETH_P_802_2); 859 memset(skb->cb, 0, sizeof(skb->cb)); 860 861 rcu_read_lock(); 862 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 863 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 864 if (!ieee80211_sdata_running(sdata)) 865 continue; 866 867 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && 868 !send_to_cooked) 869 continue; 870 871 if (prev_dev) { 872 skb2 = skb_clone(skb, GFP_ATOMIC); 873 if (skb2) { 874 skb2->dev = prev_dev; 875 netif_rx(skb2); 876 } 877 } 878 879 prev_dev = sdata->dev; 880 } 881 } 882 if (prev_dev) { 883 skb->dev = prev_dev; 884 netif_rx(skb); 885 skb = NULL; 886 } 887 rcu_read_unlock(); 888 dev_kfree_skb(skb); 889 } 890 891 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 892 struct ieee80211_tx_status *status) 893 { 894 struct sk_buff *skb = status->skb; 895 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 896 struct ieee80211_local *local = hw_to_local(hw); 897 struct ieee80211_tx_info *info = status->info; 898 struct sta_info *sta; 899 __le16 fc; 900 struct ieee80211_supported_band *sband; 901 int retry_count; 902 int rates_idx; 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 u16 tx_time_est; 910 911 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 912 913 sband = local->hw.wiphy->bands[info->band]; 914 fc = hdr->frame_control; 915 916 if (status->sta) { 917 sta = container_of(status->sta, struct sta_info, sta); 918 shift = ieee80211_vif_get_shift(&sta->sdata->vif); 919 920 if (info->flags & IEEE80211_TX_STATUS_EOSP) 921 clear_sta_flag(sta, WLAN_STA_SP); 922 923 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 924 noack_success = !!(info->flags & 925 IEEE80211_TX_STAT_NOACK_TRANSMITTED); 926 927 /* mesh Peer Service Period support */ 928 if (ieee80211_vif_is_mesh(&sta->sdata->vif) && 929 ieee80211_is_data_qos(fc)) 930 ieee80211_mpsp_trigger_process( 931 ieee80211_get_qos_ctl(hdr), sta, true, acked); 932 933 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { 934 /* 935 * The STA is in power save mode, so assume 936 * that this TX packet failed because of that. 937 */ 938 ieee80211_handle_filtered_frame(local, sta, skb); 939 return; 940 } 941 942 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && 943 (ieee80211_is_data(hdr->frame_control)) && 944 (rates_idx != -1)) 945 sta->tx_stats.last_rate = 946 info->status.rates[rates_idx]; 947 948 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 949 (ieee80211_is_data_qos(fc))) { 950 u16 ssn; 951 u8 *qc; 952 953 qc = ieee80211_get_qos_ctl(hdr); 954 tid = qc[0] & 0xf; 955 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 956 & IEEE80211_SCTL_SEQ); 957 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, 958 tid, ssn); 959 } else if (ieee80211_is_data_qos(fc)) { 960 u8 *qc = ieee80211_get_qos_ctl(hdr); 961 962 tid = qc[0] & 0xf; 963 } 964 965 if (!acked && ieee80211_is_back_req(fc)) { 966 u16 control; 967 968 /* 969 * BAR failed, store the last SSN and retry sending 970 * the BAR when the next unicast transmission on the 971 * same TID succeeds. 972 */ 973 bar = (struct ieee80211_bar *) skb->data; 974 control = le16_to_cpu(bar->control); 975 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { 976 u16 ssn = le16_to_cpu(bar->start_seq_num); 977 978 tid = (control & 979 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 980 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 981 982 ieee80211_set_bar_pending(sta, tid, ssn); 983 } 984 } 985 986 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 987 ieee80211_handle_filtered_frame(local, sta, skb); 988 return; 989 } else { 990 if (!acked && !noack_success) 991 sta->status_stats.retry_failed++; 992 sta->status_stats.retry_count += retry_count; 993 994 if (ieee80211_is_data_present(fc)) { 995 if (!acked && !noack_success) 996 sta->status_stats.msdu_failed[tid]++; 997 998 sta->status_stats.msdu_retries[tid] += 999 retry_count; 1000 } 1001 } 1002 1003 rate_control_tx_status(local, sband, status); 1004 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1005 ieee80211s_update_metric(local, sta, status); 1006 1007 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) 1008 ieee80211_frame_acked(sta, skb); 1009 1010 if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && 1011 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1012 ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, 1013 acked, info->status.tx_time); 1014 1015 if (info->status.tx_time && 1016 wiphy_ext_feature_isset(local->hw.wiphy, 1017 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS)) 1018 ieee80211_sta_register_airtime(&sta->sta, tid, 1019 info->status.tx_time, 0); 1020 1021 if ((tx_time_est = ieee80211_info_get_tx_time_est(info)) > 0) { 1022 /* Do this here to avoid the expensive lookup of the sta 1023 * in ieee80211_report_used_skb(). 1024 */ 1025 ieee80211_sta_update_pending_airtime(local, sta, 1026 skb_get_queue_mapping(skb), 1027 tx_time_est, 1028 true); 1029 ieee80211_info_set_tx_time_est(info, 0); 1030 } 1031 1032 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 1033 if (acked) { 1034 if (sta->status_stats.lost_packets) 1035 sta->status_stats.lost_packets = 0; 1036 1037 /* Track when last TDLS packet was ACKed */ 1038 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 1039 sta->status_stats.last_tdls_pkt_time = 1040 jiffies; 1041 } else if (noack_success) { 1042 /* nothing to do here, do not account as lost */ 1043 } else { 1044 ieee80211_lost_packet(sta, info); 1045 } 1046 } 1047 } 1048 1049 /* SNMP counters 1050 * Fragments are passed to low-level drivers as separate skbs, so these 1051 * are actually fragments, not frames. Update frame counters only for 1052 * the first fragment of the frame. */ 1053 if ((info->flags & IEEE80211_TX_STAT_ACK) || 1054 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 1055 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 1056 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1057 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 1058 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1059 if (retry_count > 0) 1060 I802_DEBUG_INC(local->dot11RetryCount); 1061 if (retry_count > 1) 1062 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1063 } 1064 1065 /* This counter shall be incremented for an acknowledged MPDU 1066 * with an individual address in the address 1 field or an MPDU 1067 * with a multicast address in the address 1 field of type Data 1068 * or Management. */ 1069 if (!is_multicast_ether_addr(hdr->addr1) || 1070 ieee80211_is_data(fc) || 1071 ieee80211_is_mgmt(fc)) 1072 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1073 } else { 1074 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1075 I802_DEBUG_INC(local->dot11FailedCount); 1076 } 1077 1078 if (ieee80211_is_any_nullfunc(fc) && 1079 ieee80211_has_pm(fc) && 1080 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1081 !(info->flags & IEEE80211_TX_CTL_INJECTED) && 1082 local->ps_sdata && !(local->scanning)) { 1083 if (info->flags & IEEE80211_TX_STAT_ACK) { 1084 local->ps_sdata->u.mgd.flags |= 1085 IEEE80211_STA_NULLFUNC_ACKED; 1086 } else 1087 mod_timer(&local->dynamic_ps_timer, jiffies + 1088 msecs_to_jiffies(10)); 1089 } 1090 1091 ieee80211_report_used_skb(local, skb, false); 1092 1093 /* this was a transmitted frame, but now we want to reuse it */ 1094 skb_orphan(skb); 1095 1096 /* Need to make a copy before skb->cb gets cleared */ 1097 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || 1098 !(ieee80211_is_data(fc)); 1099 1100 /* 1101 * This is a bit racy but we can avoid a lot of work 1102 * with this test... 1103 */ 1104 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { 1105 dev_kfree_skb(skb); 1106 return; 1107 } 1108 1109 /* send to monitor interfaces */ 1110 ieee80211_tx_monitor(local, skb, sband, retry_count, shift, 1111 send_to_cooked, status); 1112 } 1113 1114 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1115 { 1116 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1117 struct ieee80211_local *local = hw_to_local(hw); 1118 struct ieee80211_tx_status status = { 1119 .skb = skb, 1120 .info = IEEE80211_SKB_CB(skb), 1121 }; 1122 struct sta_info *sta; 1123 1124 rcu_read_lock(); 1125 1126 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 1127 if (sta) 1128 status.sta = &sta->sta; 1129 1130 __ieee80211_tx_status(hw, &status); 1131 rcu_read_unlock(); 1132 } 1133 EXPORT_SYMBOL(ieee80211_tx_status); 1134 1135 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1136 struct ieee80211_tx_status *status) 1137 { 1138 struct ieee80211_local *local = hw_to_local(hw); 1139 struct ieee80211_tx_info *info = status->info; 1140 struct ieee80211_sta *pubsta = status->sta; 1141 struct ieee80211_supported_band *sband; 1142 int retry_count; 1143 bool acked, noack_success; 1144 1145 if (status->skb) 1146 return __ieee80211_tx_status(hw, status); 1147 1148 if (!status->sta) 1149 return; 1150 1151 ieee80211_tx_get_rates(hw, info, &retry_count); 1152 1153 sband = hw->wiphy->bands[info->band]; 1154 1155 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1156 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1157 1158 if (pubsta) { 1159 struct sta_info *sta; 1160 1161 sta = container_of(pubsta, struct sta_info, sta); 1162 1163 if (!acked && !noack_success) 1164 sta->status_stats.retry_failed++; 1165 sta->status_stats.retry_count += retry_count; 1166 1167 if (acked) { 1168 sta->status_stats.last_ack = jiffies; 1169 1170 if (sta->status_stats.lost_packets) 1171 sta->status_stats.lost_packets = 0; 1172 1173 /* Track when last TDLS packet was ACKed */ 1174 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 1175 sta->status_stats.last_tdls_pkt_time = jiffies; 1176 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1177 return; 1178 } else if (noack_success) { 1179 /* nothing to do here, do not account as lost */ 1180 } else { 1181 ieee80211_lost_packet(sta, info); 1182 } 1183 1184 rate_control_tx_status(local, sband, status); 1185 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1186 ieee80211s_update_metric(local, sta, status); 1187 } 1188 1189 if (acked || noack_success) { 1190 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1191 if (!pubsta) 1192 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1193 if (retry_count > 0) 1194 I802_DEBUG_INC(local->dot11RetryCount); 1195 if (retry_count > 1) 1196 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1197 } else { 1198 I802_DEBUG_INC(local->dot11FailedCount); 1199 } 1200 } 1201 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1202 1203 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1204 struct ieee80211_sta *pubsta, 1205 struct ieee80211_tx_info *info) 1206 { 1207 struct ieee80211_local *local = hw_to_local(hw); 1208 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band]; 1209 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1210 struct ieee80211_tx_status status = { 1211 .info = info, 1212 .sta = pubsta, 1213 }; 1214 1215 rate_control_tx_status(local, sband, &status); 1216 1217 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1218 sta->tx_stats.last_rate = info->status.rates[0]; 1219 } 1220 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1221 1222 void ieee80211_tx_status_8023(struct ieee80211_hw *hw, 1223 struct ieee80211_vif *vif, 1224 struct sk_buff *skb) 1225 { 1226 struct ieee80211_local *local = hw_to_local(hw); 1227 struct ieee80211_sub_if_data *sdata; 1228 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1229 struct sta_info *sta; 1230 int retry_count; 1231 int rates_idx; 1232 bool acked; 1233 1234 sdata = vif_to_sdata(vif); 1235 1236 acked = info->flags & IEEE80211_TX_STAT_ACK; 1237 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 1238 1239 rcu_read_lock(); 1240 1241 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) 1242 goto counters_update; 1243 1244 if (IS_ERR(sta)) 1245 goto counters_update; 1246 1247 if (!acked) 1248 sta->status_stats.retry_failed++; 1249 1250 if (rates_idx != -1) 1251 sta->tx_stats.last_rate = info->status.rates[rates_idx]; 1252 1253 sta->status_stats.retry_count += retry_count; 1254 1255 if (ieee80211_hw_check(hw, REPORTS_TX_ACK_STATUS)) { 1256 if (acked && vif->type == NL80211_IFTYPE_STATION) 1257 ieee80211_sta_reset_conn_monitor(sdata); 1258 1259 sta->status_stats.last_ack = jiffies; 1260 if (info->flags & IEEE80211_TX_STAT_ACK) { 1261 if (sta->status_stats.lost_packets) 1262 sta->status_stats.lost_packets = 0; 1263 1264 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 1265 sta->status_stats.last_tdls_pkt_time = jiffies; 1266 } else { 1267 ieee80211_lost_packet(sta, info); 1268 } 1269 } 1270 1271 counters_update: 1272 rcu_read_unlock(); 1273 ieee80211_led_tx(local); 1274 1275 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 1276 !(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) 1277 goto skip_stats_update; 1278 1279 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1280 if (is_multicast_ether_addr(skb->data)) 1281 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1282 if (retry_count > 0) 1283 I802_DEBUG_INC(local->dot11RetryCount); 1284 if (retry_count > 1) 1285 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1286 1287 skip_stats_update: 1288 ieee80211_report_used_skb(local, skb, false); 1289 dev_kfree_skb(skb); 1290 } 1291 EXPORT_SYMBOL(ieee80211_tx_status_8023); 1292 1293 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1294 { 1295 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1296 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1297 num_packets, GFP_ATOMIC); 1298 } 1299 EXPORT_SYMBOL(ieee80211_report_low_ack); 1300 1301 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1302 { 1303 struct ieee80211_local *local = hw_to_local(hw); 1304 1305 ieee80211_report_used_skb(local, skb, true); 1306 dev_kfree_skb_any(skb); 1307 } 1308 EXPORT_SYMBOL(ieee80211_free_txskb); 1309 1310 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1311 struct sk_buff_head *skbs) 1312 { 1313 struct sk_buff *skb; 1314 1315 while ((skb = __skb_dequeue(skbs))) 1316 ieee80211_free_txskb(hw, skb); 1317 } 1318