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; 642 643 rcu_read_lock(); 644 sdata = ieee80211_sdata_from_skb(local, skb); 645 if (sdata) { 646 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 info->status.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 cfg80211_control_port_tx_status(&sdata->wdev, 658 cookie, 659 skb->data, 660 skb->len, 661 acked, 662 GFP_ATOMIC); 663 } 664 rcu_read_unlock(); 665 666 dev_kfree_skb_any(skb); 667 } else if (dropped) { 668 dev_kfree_skb_any(skb); 669 } else { 670 /* consumes skb */ 671 skb_complete_wifi_ack(skb, acked); 672 } 673 } 674 675 static void ieee80211_report_used_skb(struct ieee80211_local *local, 676 struct sk_buff *skb, bool dropped) 677 { 678 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 679 u16 tx_time_est = ieee80211_info_get_tx_time_est(info); 680 struct ieee80211_hdr *hdr = (void *)skb->data; 681 bool acked = info->flags & IEEE80211_TX_STAT_ACK; 682 683 if (dropped) 684 acked = false; 685 686 if (tx_time_est) { 687 struct sta_info *sta; 688 689 rcu_read_lock(); 690 691 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 692 ieee80211_sta_update_pending_airtime(local, sta, 693 skb_get_queue_mapping(skb), 694 tx_time_est, 695 true); 696 rcu_read_unlock(); 697 } 698 699 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { 700 struct ieee80211_sub_if_data *sdata; 701 702 rcu_read_lock(); 703 704 sdata = ieee80211_sdata_from_skb(local, skb); 705 706 if (!sdata) { 707 skb->dev = NULL; 708 } else { 709 unsigned int hdr_size = 710 ieee80211_hdrlen(hdr->frame_control); 711 712 /* Check to see if packet is a TDLS teardown packet */ 713 if (ieee80211_is_data(hdr->frame_control) && 714 (ieee80211_get_tdls_action(skb, hdr_size) == 715 WLAN_TDLS_TEARDOWN)) 716 ieee80211_tdls_td_tx_handle(local, sdata, skb, 717 info->flags); 718 else 719 ieee80211_mgd_conn_tx_status(sdata, 720 hdr->frame_control, 721 acked); 722 } 723 724 rcu_read_unlock(); 725 } else if (info->ack_frame_id) { 726 ieee80211_report_ack_skb(local, info, acked, dropped); 727 } 728 729 if (!dropped && skb->destructor) { 730 skb->wifi_acked_valid = 1; 731 skb->wifi_acked = acked; 732 } 733 734 ieee80211_led_tx(local); 735 736 if (skb_has_frag_list(skb)) { 737 kfree_skb_list(skb_shinfo(skb)->frag_list); 738 skb_shinfo(skb)->frag_list = NULL; 739 } 740 } 741 742 /* 743 * Use a static threshold for now, best value to be determined 744 * by testing ... 745 * Should it depend on: 746 * - on # of retransmissions 747 * - current throughput (higher value for higher tpt)? 748 */ 749 #define STA_LOST_PKT_THRESHOLD 50 750 #define STA_LOST_TDLS_PKT_THRESHOLD 10 751 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ 752 753 static void ieee80211_lost_packet(struct sta_info *sta, 754 struct ieee80211_tx_info *info) 755 { 756 /* If driver relies on its own algorithm for station kickout, skip 757 * mac80211 packet loss mechanism. 758 */ 759 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) 760 return; 761 762 /* This packet was aggregated but doesn't carry status info */ 763 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 764 !(info->flags & IEEE80211_TX_STAT_AMPDU)) 765 return; 766 767 sta->status_stats.lost_packets++; 768 if (!sta->sta.tdls && 769 sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD) 770 return; 771 772 /* 773 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD 774 * of the last packets were lost, and that no ACK was received in the 775 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss 776 * mechanism. 777 */ 778 if (sta->sta.tdls && 779 (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD || 780 time_before(jiffies, 781 sta->status_stats.last_tdls_pkt_time + 782 STA_LOST_TDLS_PKT_TIME))) 783 return; 784 785 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 786 sta->status_stats.lost_packets, GFP_ATOMIC); 787 sta->status_stats.lost_packets = 0; 788 } 789 790 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 791 struct ieee80211_tx_info *info, 792 int *retry_count) 793 { 794 int rates_idx = -1; 795 int count = -1; 796 int i; 797 798 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 799 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 800 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 801 /* just the first aggr frame carry status info */ 802 info->status.rates[i].idx = -1; 803 info->status.rates[i].count = 0; 804 break; 805 } else if (info->status.rates[i].idx < 0) { 806 break; 807 } else if (i >= hw->max_report_rates) { 808 /* the HW cannot have attempted that rate */ 809 info->status.rates[i].idx = -1; 810 info->status.rates[i].count = 0; 811 break; 812 } 813 814 count += info->status.rates[i].count; 815 } 816 rates_idx = i - 1; 817 818 if (count < 0) 819 count = 0; 820 821 *retry_count = count; 822 return rates_idx; 823 } 824 825 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 826 struct ieee80211_supported_band *sband, 827 int retry_count, int shift, bool send_to_cooked, 828 struct ieee80211_tx_status *status) 829 { 830 struct sk_buff *skb2; 831 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 832 struct ieee80211_sub_if_data *sdata; 833 struct net_device *prev_dev = NULL; 834 int rtap_len; 835 836 /* send frame to monitor interfaces now */ 837 rtap_len = ieee80211_tx_radiotap_len(info, status); 838 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 839 pr_err("ieee80211_tx_status: headroom too small\n"); 840 dev_kfree_skb(skb); 841 return; 842 } 843 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, 844 rtap_len, shift, status); 845 846 /* XXX: is this sufficient for BPF? */ 847 skb_reset_mac_header(skb); 848 skb->ip_summed = CHECKSUM_UNNECESSARY; 849 skb->pkt_type = PACKET_OTHERHOST; 850 skb->protocol = htons(ETH_P_802_2); 851 memset(skb->cb, 0, sizeof(skb->cb)); 852 853 rcu_read_lock(); 854 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 855 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 856 if (!ieee80211_sdata_running(sdata)) 857 continue; 858 859 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && 860 !send_to_cooked) 861 continue; 862 863 if (prev_dev) { 864 skb2 = skb_clone(skb, GFP_ATOMIC); 865 if (skb2) { 866 skb2->dev = prev_dev; 867 netif_rx(skb2); 868 } 869 } 870 871 prev_dev = sdata->dev; 872 } 873 } 874 if (prev_dev) { 875 skb->dev = prev_dev; 876 netif_rx(skb); 877 skb = NULL; 878 } 879 rcu_read_unlock(); 880 dev_kfree_skb(skb); 881 } 882 883 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 884 struct ieee80211_tx_status *status) 885 { 886 struct sk_buff *skb = status->skb; 887 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 888 struct ieee80211_local *local = hw_to_local(hw); 889 struct ieee80211_tx_info *info = status->info; 890 struct sta_info *sta; 891 __le16 fc; 892 struct ieee80211_supported_band *sband; 893 int retry_count; 894 int rates_idx; 895 bool send_to_cooked; 896 bool acked; 897 bool noack_success; 898 struct ieee80211_bar *bar; 899 int shift = 0; 900 int tid = IEEE80211_NUM_TIDS; 901 u16 tx_time_est; 902 903 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 904 905 sband = local->hw.wiphy->bands[info->band]; 906 fc = hdr->frame_control; 907 908 if (status->sta) { 909 sta = container_of(status->sta, struct sta_info, sta); 910 shift = ieee80211_vif_get_shift(&sta->sdata->vif); 911 912 if (info->flags & IEEE80211_TX_STATUS_EOSP) 913 clear_sta_flag(sta, WLAN_STA_SP); 914 915 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 916 noack_success = !!(info->flags & 917 IEEE80211_TX_STAT_NOACK_TRANSMITTED); 918 919 /* mesh Peer Service Period support */ 920 if (ieee80211_vif_is_mesh(&sta->sdata->vif) && 921 ieee80211_is_data_qos(fc)) 922 ieee80211_mpsp_trigger_process( 923 ieee80211_get_qos_ctl(hdr), sta, true, acked); 924 925 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { 926 /* 927 * The STA is in power save mode, so assume 928 * that this TX packet failed because of that. 929 */ 930 ieee80211_handle_filtered_frame(local, sta, skb); 931 return; 932 } 933 934 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && 935 (ieee80211_is_data(hdr->frame_control)) && 936 (rates_idx != -1)) 937 sta->tx_stats.last_rate = 938 info->status.rates[rates_idx]; 939 940 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 941 (ieee80211_is_data_qos(fc))) { 942 u16 ssn; 943 u8 *qc; 944 945 qc = ieee80211_get_qos_ctl(hdr); 946 tid = qc[0] & 0xf; 947 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 948 & IEEE80211_SCTL_SEQ); 949 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, 950 tid, ssn); 951 } else if (ieee80211_is_data_qos(fc)) { 952 u8 *qc = ieee80211_get_qos_ctl(hdr); 953 954 tid = qc[0] & 0xf; 955 } 956 957 if (!acked && ieee80211_is_back_req(fc)) { 958 u16 control; 959 960 /* 961 * BAR failed, store the last SSN and retry sending 962 * the BAR when the next unicast transmission on the 963 * same TID succeeds. 964 */ 965 bar = (struct ieee80211_bar *) skb->data; 966 control = le16_to_cpu(bar->control); 967 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { 968 u16 ssn = le16_to_cpu(bar->start_seq_num); 969 970 tid = (control & 971 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 972 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 973 974 ieee80211_set_bar_pending(sta, tid, ssn); 975 } 976 } 977 978 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 979 ieee80211_handle_filtered_frame(local, sta, skb); 980 return; 981 } else { 982 if (!acked && !noack_success) 983 sta->status_stats.retry_failed++; 984 sta->status_stats.retry_count += retry_count; 985 986 if (ieee80211_is_data_present(fc)) { 987 if (!acked && !noack_success) 988 sta->status_stats.msdu_failed[tid]++; 989 990 sta->status_stats.msdu_retries[tid] += 991 retry_count; 992 } 993 } 994 995 rate_control_tx_status(local, sband, status); 996 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 997 ieee80211s_update_metric(local, sta, status); 998 999 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) 1000 ieee80211_frame_acked(sta, skb); 1001 1002 if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && 1003 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1004 ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, 1005 acked, info->status.tx_time); 1006 1007 if (info->status.tx_time && 1008 wiphy_ext_feature_isset(local->hw.wiphy, 1009 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS)) 1010 ieee80211_sta_register_airtime(&sta->sta, tid, 1011 info->status.tx_time, 0); 1012 1013 if ((tx_time_est = ieee80211_info_get_tx_time_est(info)) > 0) { 1014 /* Do this here to avoid the expensive lookup of the sta 1015 * in ieee80211_report_used_skb(). 1016 */ 1017 ieee80211_sta_update_pending_airtime(local, sta, 1018 skb_get_queue_mapping(skb), 1019 tx_time_est, 1020 true); 1021 ieee80211_info_set_tx_time_est(info, 0); 1022 } 1023 1024 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 1025 if (acked) { 1026 if (sta->status_stats.lost_packets) 1027 sta->status_stats.lost_packets = 0; 1028 1029 /* Track when last TDLS packet was ACKed */ 1030 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 1031 sta->status_stats.last_tdls_pkt_time = 1032 jiffies; 1033 } else if (noack_success) { 1034 /* nothing to do here, do not account as lost */ 1035 } else { 1036 ieee80211_lost_packet(sta, info); 1037 } 1038 } 1039 } 1040 1041 /* SNMP counters 1042 * Fragments are passed to low-level drivers as separate skbs, so these 1043 * are actually fragments, not frames. Update frame counters only for 1044 * the first fragment of the frame. */ 1045 if ((info->flags & IEEE80211_TX_STAT_ACK) || 1046 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 1047 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 1048 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1049 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 1050 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1051 if (retry_count > 0) 1052 I802_DEBUG_INC(local->dot11RetryCount); 1053 if (retry_count > 1) 1054 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1055 } 1056 1057 /* This counter shall be incremented for an acknowledged MPDU 1058 * with an individual address in the address 1 field or an MPDU 1059 * with a multicast address in the address 1 field of type Data 1060 * or Management. */ 1061 if (!is_multicast_ether_addr(hdr->addr1) || 1062 ieee80211_is_data(fc) || 1063 ieee80211_is_mgmt(fc)) 1064 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1065 } else { 1066 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1067 I802_DEBUG_INC(local->dot11FailedCount); 1068 } 1069 1070 if (ieee80211_is_any_nullfunc(fc) && 1071 ieee80211_has_pm(fc) && 1072 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1073 !(info->flags & IEEE80211_TX_CTL_INJECTED) && 1074 local->ps_sdata && !(local->scanning)) { 1075 if (info->flags & IEEE80211_TX_STAT_ACK) { 1076 local->ps_sdata->u.mgd.flags |= 1077 IEEE80211_STA_NULLFUNC_ACKED; 1078 } else 1079 mod_timer(&local->dynamic_ps_timer, jiffies + 1080 msecs_to_jiffies(10)); 1081 } 1082 1083 ieee80211_report_used_skb(local, skb, false); 1084 1085 /* this was a transmitted frame, but now we want to reuse it */ 1086 skb_orphan(skb); 1087 1088 /* Need to make a copy before skb->cb gets cleared */ 1089 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || 1090 !(ieee80211_is_data(fc)); 1091 1092 /* 1093 * This is a bit racy but we can avoid a lot of work 1094 * with this test... 1095 */ 1096 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { 1097 dev_kfree_skb(skb); 1098 return; 1099 } 1100 1101 /* send to monitor interfaces */ 1102 ieee80211_tx_monitor(local, skb, sband, retry_count, shift, 1103 send_to_cooked, status); 1104 } 1105 1106 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1107 { 1108 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1109 struct ieee80211_local *local = hw_to_local(hw); 1110 struct ieee80211_tx_status status = { 1111 .skb = skb, 1112 .info = IEEE80211_SKB_CB(skb), 1113 }; 1114 struct sta_info *sta; 1115 1116 rcu_read_lock(); 1117 1118 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 1119 if (sta) 1120 status.sta = &sta->sta; 1121 1122 __ieee80211_tx_status(hw, &status); 1123 rcu_read_unlock(); 1124 } 1125 EXPORT_SYMBOL(ieee80211_tx_status); 1126 1127 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1128 struct ieee80211_tx_status *status) 1129 { 1130 struct ieee80211_local *local = hw_to_local(hw); 1131 struct ieee80211_tx_info *info = status->info; 1132 struct ieee80211_sta *pubsta = status->sta; 1133 struct ieee80211_supported_band *sband; 1134 int retry_count; 1135 bool acked, noack_success; 1136 1137 if (status->skb) 1138 return __ieee80211_tx_status(hw, status); 1139 1140 if (!status->sta) 1141 return; 1142 1143 ieee80211_tx_get_rates(hw, info, &retry_count); 1144 1145 sband = hw->wiphy->bands[info->band]; 1146 1147 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1148 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1149 1150 if (pubsta) { 1151 struct sta_info *sta; 1152 1153 sta = container_of(pubsta, struct sta_info, sta); 1154 1155 if (!acked && !noack_success) 1156 sta->status_stats.retry_failed++; 1157 sta->status_stats.retry_count += retry_count; 1158 1159 if (acked) { 1160 sta->status_stats.last_ack = jiffies; 1161 1162 if (sta->status_stats.lost_packets) 1163 sta->status_stats.lost_packets = 0; 1164 1165 /* Track when last TDLS packet was ACKed */ 1166 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 1167 sta->status_stats.last_tdls_pkt_time = jiffies; 1168 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1169 return; 1170 } else if (noack_success) { 1171 /* nothing to do here, do not account as lost */ 1172 } else { 1173 ieee80211_lost_packet(sta, info); 1174 } 1175 1176 rate_control_tx_status(local, sband, status); 1177 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1178 ieee80211s_update_metric(local, sta, status); 1179 } 1180 1181 if (acked || noack_success) { 1182 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1183 if (!pubsta) 1184 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1185 if (retry_count > 0) 1186 I802_DEBUG_INC(local->dot11RetryCount); 1187 if (retry_count > 1) 1188 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1189 } else { 1190 I802_DEBUG_INC(local->dot11FailedCount); 1191 } 1192 } 1193 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1194 1195 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1196 struct ieee80211_sta *pubsta, 1197 struct ieee80211_tx_info *info) 1198 { 1199 struct ieee80211_local *local = hw_to_local(hw); 1200 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band]; 1201 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1202 struct ieee80211_tx_status status = { 1203 .info = info, 1204 .sta = pubsta, 1205 }; 1206 1207 rate_control_tx_status(local, sband, &status); 1208 1209 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1210 sta->tx_stats.last_rate = info->status.rates[0]; 1211 } 1212 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1213 1214 void ieee80211_tx_status_8023(struct ieee80211_hw *hw, 1215 struct ieee80211_vif *vif, 1216 struct sk_buff *skb) 1217 { 1218 struct ieee80211_local *local = hw_to_local(hw); 1219 struct ieee80211_sub_if_data *sdata; 1220 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1221 struct sta_info *sta; 1222 int retry_count; 1223 int rates_idx; 1224 bool acked; 1225 1226 sdata = vif_to_sdata(vif); 1227 1228 acked = info->flags & IEEE80211_TX_STAT_ACK; 1229 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 1230 1231 rcu_read_lock(); 1232 1233 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) 1234 goto counters_update; 1235 1236 if (IS_ERR(sta)) 1237 goto counters_update; 1238 1239 if (!acked) 1240 sta->status_stats.retry_failed++; 1241 1242 if (rates_idx != -1) 1243 sta->tx_stats.last_rate = info->status.rates[rates_idx]; 1244 1245 sta->status_stats.retry_count += retry_count; 1246 1247 if (ieee80211_hw_check(hw, REPORTS_TX_ACK_STATUS)) { 1248 if (acked && vif->type == NL80211_IFTYPE_STATION) 1249 ieee80211_sta_reset_conn_monitor(sdata); 1250 1251 sta->status_stats.last_ack = jiffies; 1252 if (info->flags & IEEE80211_TX_STAT_ACK) { 1253 if (sta->status_stats.lost_packets) 1254 sta->status_stats.lost_packets = 0; 1255 1256 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 1257 sta->status_stats.last_tdls_pkt_time = jiffies; 1258 } else { 1259 ieee80211_lost_packet(sta, info); 1260 } 1261 } 1262 1263 counters_update: 1264 rcu_read_unlock(); 1265 ieee80211_led_tx(local); 1266 1267 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 1268 !(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) 1269 goto skip_stats_update; 1270 1271 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1272 if (is_multicast_ether_addr(skb->data)) 1273 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1274 if (retry_count > 0) 1275 I802_DEBUG_INC(local->dot11RetryCount); 1276 if (retry_count > 1) 1277 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1278 1279 skip_stats_update: 1280 ieee80211_report_used_skb(local, skb, false); 1281 dev_kfree_skb(skb); 1282 } 1283 EXPORT_SYMBOL(ieee80211_tx_status_8023); 1284 1285 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1286 { 1287 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1288 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1289 num_packets, GFP_ATOMIC); 1290 } 1291 EXPORT_SYMBOL(ieee80211_report_low_ack); 1292 1293 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1294 { 1295 struct ieee80211_local *local = hw_to_local(hw); 1296 1297 ieee80211_report_used_skb(local, skb, true); 1298 dev_kfree_skb_any(skb); 1299 } 1300 EXPORT_SYMBOL(ieee80211_free_txskb); 1301 1302 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1303 struct sk_buff_head *skbs) 1304 { 1305 struct sk_buff *skb; 1306 1307 while ((skb = __skb_dequeue(skbs))) 1308 ieee80211_free_txskb(hw, skb); 1309 } 1310