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_TX_CTL_HW_80211_ENCAP)) { 54 ieee80211_free_txskb(&local->hw, skb); 55 return; 56 } 57 58 /* 59 * This skb 'survived' a round-trip through the driver, and 60 * hopefully the driver didn't mangle it too badly. However, 61 * we can definitely not rely on the control information 62 * being correct. Clear it so we don't get junk there, and 63 * indicate that it needs new processing, but must not be 64 * modified/encrypted again. 65 */ 66 memset(&info->control, 0, sizeof(info->control)); 67 68 info->control.jiffies = jiffies; 69 info->control.vif = &sta->sdata->vif; 70 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING; 71 info->flags |= IEEE80211_TX_INTFL_RETRANSMISSION; 72 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; 73 74 sta->status_stats.filtered++; 75 76 /* 77 * Clear more-data bit on filtered frames, it might be set 78 * but later frames might time out so it might have to be 79 * clear again ... It's all rather unlikely (this frame 80 * should time out first, right?) but let's not confuse 81 * peers unnecessarily. 82 */ 83 if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) 84 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); 85 86 if (ieee80211_is_data_qos(hdr->frame_control)) { 87 u8 *p = ieee80211_get_qos_ctl(hdr); 88 int tid = *p & IEEE80211_QOS_CTL_TID_MASK; 89 90 /* 91 * Clear EOSP if set, this could happen e.g. 92 * if an absence period (us being a P2P GO) 93 * shortens the SP. 94 */ 95 if (*p & IEEE80211_QOS_CTL_EOSP) 96 *p &= ~IEEE80211_QOS_CTL_EOSP; 97 ac = ieee80211_ac_from_tid(tid); 98 } else { 99 ac = IEEE80211_AC_BE; 100 } 101 102 /* 103 * Clear the TX filter mask for this STA when sending the next 104 * packet. If the STA went to power save mode, this will happen 105 * when it wakes up for the next time. 106 */ 107 set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT); 108 ieee80211_clear_fast_xmit(sta); 109 110 /* 111 * This code races in the following way: 112 * 113 * (1) STA sends frame indicating it will go to sleep and does so 114 * (2) hardware/firmware adds STA to filter list, passes frame up 115 * (3) hardware/firmware processes TX fifo and suppresses a frame 116 * (4) we get TX status before having processed the frame and 117 * knowing that the STA has gone to sleep. 118 * 119 * This is actually quite unlikely even when both those events are 120 * processed from interrupts coming in quickly after one another or 121 * even at the same time because we queue both TX status events and 122 * RX frames to be processed by a tasklet and process them in the 123 * same order that they were received or TX status last. Hence, there 124 * is no race as long as the frame RX is processed before the next TX 125 * status, which drivers can ensure, see below. 126 * 127 * Note that this can only happen if the hardware or firmware can 128 * actually add STAs to the filter list, if this is done by the 129 * driver in response to set_tim() (which will only reduce the race 130 * this whole filtering tries to solve, not completely solve it) 131 * this situation cannot happen. 132 * 133 * To completely solve this race drivers need to make sure that they 134 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing 135 * functions and 136 * (b) always process RX events before TX status events if ordering 137 * can be unknown, for example with different interrupt status 138 * bits. 139 * (c) if PS mode transitions are manual (i.e. the flag 140 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state 141 * changes before calling TX status events if ordering can be 142 * unknown. 143 */ 144 if (test_sta_flag(sta, WLAN_STA_PS_STA) && 145 skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { 146 skb_queue_tail(&sta->tx_filtered[ac], skb); 147 sta_info_recalc_tim(sta); 148 149 if (!timer_pending(&local->sta_cleanup)) 150 mod_timer(&local->sta_cleanup, 151 round_jiffies(jiffies + 152 STA_INFO_CLEANUP_INTERVAL)); 153 return; 154 } 155 156 if (!test_sta_flag(sta, WLAN_STA_PS_STA) && 157 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { 158 /* Software retry the packet once */ 159 info->flags |= IEEE80211_TX_INTFL_RETRIED; 160 ieee80211_add_pending_skb(local, skb); 161 return; 162 } 163 164 ps_dbg_ratelimited(sta->sdata, 165 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", 166 skb_queue_len(&sta->tx_filtered[ac]), 167 !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); 168 ieee80211_free_txskb(&local->hw, skb); 169 } 170 171 static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) 172 { 173 struct tid_ampdu_tx *tid_tx; 174 175 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 176 if (!tid_tx || !tid_tx->bar_pending) 177 return; 178 179 tid_tx->bar_pending = false; 180 ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn); 181 } 182 183 static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) 184 { 185 struct ieee80211_mgmt *mgmt = (void *) skb->data; 186 struct ieee80211_local *local = sta->local; 187 struct ieee80211_sub_if_data *sdata = sta->sdata; 188 189 if (ieee80211_is_data_qos(mgmt->frame_control)) { 190 struct ieee80211_hdr *hdr = (void *) skb->data; 191 u8 *qc = ieee80211_get_qos_ctl(hdr); 192 u16 tid = qc[0] & 0xf; 193 194 ieee80211_check_pending_bar(sta, hdr->addr1, tid); 195 } 196 197 if (ieee80211_is_action(mgmt->frame_control) && 198 !ieee80211_has_protected(mgmt->frame_control) && 199 mgmt->u.action.category == WLAN_CATEGORY_HT && 200 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && 201 ieee80211_sdata_running(sdata)) { 202 enum ieee80211_smps_mode smps_mode; 203 204 switch (mgmt->u.action.u.ht_smps.smps_control) { 205 case WLAN_HT_SMPS_CONTROL_DYNAMIC: 206 smps_mode = IEEE80211_SMPS_DYNAMIC; 207 break; 208 case WLAN_HT_SMPS_CONTROL_STATIC: 209 smps_mode = IEEE80211_SMPS_STATIC; 210 break; 211 case WLAN_HT_SMPS_CONTROL_DISABLED: 212 default: /* shouldn't happen since we don't send that */ 213 smps_mode = IEEE80211_SMPS_OFF; 214 break; 215 } 216 217 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 218 /* 219 * This update looks racy, but isn't -- if we come 220 * here we've definitely got a station that we're 221 * talking to, and on a managed interface that can 222 * only be the AP. And the only other place updating 223 * this variable in managed mode is before association. 224 */ 225 sdata->smps_mode = smps_mode; 226 ieee80211_queue_work(&local->hw, &sdata->recalc_smps); 227 } else if (sdata->vif.type == NL80211_IFTYPE_AP || 228 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 229 sta->known_smps_mode = smps_mode; 230 } 231 } 232 } 233 234 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) 235 { 236 struct tid_ampdu_tx *tid_tx; 237 238 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 239 if (!tid_tx) 240 return; 241 242 tid_tx->failed_bar_ssn = ssn; 243 tid_tx->bar_pending = true; 244 } 245 246 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info, 247 struct ieee80211_tx_status *status) 248 { 249 int len = sizeof(struct ieee80211_radiotap_header); 250 251 /* IEEE80211_RADIOTAP_RATE rate */ 252 if (status && status->rate && !(status->rate->flags & 253 (RATE_INFO_FLAGS_MCS | 254 RATE_INFO_FLAGS_DMG | 255 RATE_INFO_FLAGS_EDMG | 256 RATE_INFO_FLAGS_VHT_MCS | 257 RATE_INFO_FLAGS_HE_MCS))) 258 len += 2; 259 else if (info->status.rates[0].idx >= 0 && 260 !(info->status.rates[0].flags & 261 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))) 262 len += 2; 263 264 /* IEEE80211_RADIOTAP_TX_FLAGS */ 265 len += 2; 266 267 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 268 len += 1; 269 270 /* IEEE80211_RADIOTAP_MCS 271 * IEEE80211_RADIOTAP_VHT */ 272 if (status && status->rate) { 273 if (status->rate->flags & RATE_INFO_FLAGS_MCS) 274 len += 3; 275 else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS) 276 len = ALIGN(len, 2) + 12; 277 else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS) 278 len = ALIGN(len, 2) + 12; 279 } else if (info->status.rates[0].idx >= 0) { 280 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) 281 len += 3; 282 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) 283 len = ALIGN(len, 2) + 12; 284 } 285 286 return len; 287 } 288 289 static void 290 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, 291 struct ieee80211_supported_band *sband, 292 struct sk_buff *skb, int retry_count, 293 int rtap_len, int shift, 294 struct ieee80211_tx_status *status) 295 { 296 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 297 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 298 struct ieee80211_radiotap_header *rthdr; 299 unsigned char *pos; 300 u16 legacy_rate = 0; 301 u16 txflags; 302 303 rthdr = skb_push(skb, rtap_len); 304 305 memset(rthdr, 0, rtap_len); 306 rthdr->it_len = cpu_to_le16(rtap_len); 307 rthdr->it_present = 308 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | 309 (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); 310 pos = (unsigned char *)(rthdr + 1); 311 312 /* 313 * XXX: Once radiotap gets the bitmap reset thing the vendor 314 * extensions proposal contains, we can actually report 315 * the whole set of tries we did. 316 */ 317 318 /* IEEE80211_RADIOTAP_RATE */ 319 320 if (status && status->rate) { 321 if (!(status->rate->flags & (RATE_INFO_FLAGS_MCS | 322 RATE_INFO_FLAGS_DMG | 323 RATE_INFO_FLAGS_EDMG | 324 RATE_INFO_FLAGS_VHT_MCS | 325 RATE_INFO_FLAGS_HE_MCS))) 326 legacy_rate = status->rate->legacy; 327 } else if (info->status.rates[0].idx >= 0 && 328 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | 329 IEEE80211_TX_RC_VHT_MCS))) 330 legacy_rate = 331 sband->bitrates[info->status.rates[0].idx].bitrate; 332 333 if (legacy_rate) { 334 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); 335 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift)); 336 /* padding for tx flags */ 337 pos += 2; 338 } 339 340 /* IEEE80211_RADIOTAP_TX_FLAGS */ 341 txflags = 0; 342 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 343 !is_multicast_ether_addr(hdr->addr1)) 344 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; 345 346 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 347 txflags |= IEEE80211_RADIOTAP_F_TX_CTS; 348 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) 349 txflags |= IEEE80211_RADIOTAP_F_TX_RTS; 350 351 put_unaligned_le16(txflags, pos); 352 pos += 2; 353 354 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 355 /* for now report the total retry_count */ 356 *pos = retry_count; 357 pos++; 358 359 if (status && status->rate && 360 (status->rate->flags & RATE_INFO_FLAGS_MCS)) { 361 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); 362 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 363 IEEE80211_RADIOTAP_MCS_HAVE_GI | 364 IEEE80211_RADIOTAP_MCS_HAVE_BW; 365 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI) 366 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 367 if (status->rate->bw == RATE_INFO_BW_40) 368 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 369 pos[2] = status->rate->mcs; 370 pos += 3; 371 } else if (status && status->rate && 372 (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) { 373 u16 known = local->hw.radiotap_vht_details & 374 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 375 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 376 377 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); 378 379 /* required alignment from rthdr */ 380 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 381 382 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 383 put_unaligned_le16(known, pos); 384 pos += 2; 385 386 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 387 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI) 388 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 389 pos++; 390 391 /* u8 bandwidth */ 392 switch (status->rate->bw) { 393 case RATE_INFO_BW_160: 394 *pos = 11; 395 break; 396 case RATE_INFO_BW_80: 397 *pos = 4; 398 break; 399 case RATE_INFO_BW_40: 400 *pos = 1; 401 break; 402 default: 403 *pos = 0; 404 break; 405 } 406 pos++; 407 408 /* u8 mcs_nss[4] */ 409 *pos = (status->rate->mcs << 4) | status->rate->nss; 410 pos += 4; 411 412 /* u8 coding */ 413 pos++; 414 /* u8 group_id */ 415 pos++; 416 /* u16 partial_aid */ 417 pos += 2; 418 } else if (status && status->rate && 419 (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) { 420 struct ieee80211_radiotap_he *he; 421 422 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE); 423 424 /* required alignment from rthdr */ 425 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 426 he = (struct ieee80211_radiotap_he *)pos; 427 428 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU | 429 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 430 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 431 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 432 433 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN); 434 435 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f) 436 437 he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss); 438 439 #define CHECK_GI(s) \ 440 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \ 441 (int)NL80211_RATE_INFO_HE_GI_##s) 442 443 CHECK_GI(0_8); 444 CHECK_GI(1_6); 445 CHECK_GI(3_2); 446 447 he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs); 448 he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm); 449 450 he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi); 451 452 switch (status->rate->bw) { 453 case RATE_INFO_BW_20: 454 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 455 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ); 456 break; 457 case RATE_INFO_BW_40: 458 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 459 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ); 460 break; 461 case RATE_INFO_BW_80: 462 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 463 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ); 464 break; 465 case RATE_INFO_BW_160: 466 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 467 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ); 468 break; 469 case RATE_INFO_BW_HE_RU: 470 #define CHECK_RU_ALLOC(s) \ 471 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \ 472 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4) 473 474 CHECK_RU_ALLOC(26); 475 CHECK_RU_ALLOC(52); 476 CHECK_RU_ALLOC(106); 477 CHECK_RU_ALLOC(242); 478 CHECK_RU_ALLOC(484); 479 CHECK_RU_ALLOC(996); 480 CHECK_RU_ALLOC(2x996); 481 482 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 483 status->rate->he_ru_alloc + 4); 484 break; 485 default: 486 WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw); 487 } 488 489 pos += sizeof(struct ieee80211_radiotap_he); 490 } 491 492 if ((status && status->rate) || info->status.rates[0].idx < 0) 493 return; 494 495 /* IEEE80211_RADIOTAP_MCS 496 * IEEE80211_RADIOTAP_VHT */ 497 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { 498 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); 499 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 500 IEEE80211_RADIOTAP_MCS_HAVE_GI | 501 IEEE80211_RADIOTAP_MCS_HAVE_BW; 502 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 503 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 504 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 505 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 506 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) 507 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; 508 pos[2] = info->status.rates[0].idx; 509 pos += 3; 510 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { 511 u16 known = local->hw.radiotap_vht_details & 512 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 513 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 514 515 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); 516 517 /* required alignment from rthdr */ 518 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 519 520 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 521 put_unaligned_le16(known, pos); 522 pos += 2; 523 524 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 525 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 526 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 527 pos++; 528 529 /* u8 bandwidth */ 530 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 531 *pos = 1; 532 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 533 *pos = 4; 534 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 535 *pos = 11; 536 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ 537 *pos = 0; 538 pos++; 539 540 /* u8 mcs_nss[4] */ 541 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | 542 ieee80211_rate_get_vht_nss(&info->status.rates[0]); 543 pos += 4; 544 545 /* u8 coding */ 546 pos++; 547 /* u8 group_id */ 548 pos++; 549 /* u16 partial_aid */ 550 pos += 2; 551 } 552 } 553 554 /* 555 * Handles the tx for TDLS teardown frames. 556 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP 557 */ 558 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, 559 struct ieee80211_sub_if_data *sdata, 560 struct sk_buff *skb, u32 flags) 561 { 562 struct sk_buff *teardown_skb; 563 struct sk_buff *orig_teardown_skb; 564 bool is_teardown = false; 565 566 /* Get the teardown data we need and free the lock */ 567 spin_lock(&sdata->u.mgd.teardown_lock); 568 teardown_skb = sdata->u.mgd.teardown_skb; 569 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; 570 if ((skb == orig_teardown_skb) && teardown_skb) { 571 sdata->u.mgd.teardown_skb = NULL; 572 sdata->u.mgd.orig_teardown_skb = NULL; 573 is_teardown = true; 574 } 575 spin_unlock(&sdata->u.mgd.teardown_lock); 576 577 if (is_teardown) { 578 /* This mechanism relies on being able to get ACKs */ 579 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); 580 581 /* Check if peer has ACKed */ 582 if (flags & IEEE80211_TX_STAT_ACK) { 583 dev_kfree_skb_any(teardown_skb); 584 } else { 585 tdls_dbg(sdata, 586 "TDLS Resending teardown through AP\n"); 587 588 ieee80211_subif_start_xmit(teardown_skb, skb->dev); 589 } 590 } 591 } 592 593 static struct ieee80211_sub_if_data * 594 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) 595 { 596 struct ieee80211_sub_if_data *sdata; 597 598 if (skb->dev) { 599 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 600 if (!sdata->dev) 601 continue; 602 603 if (skb->dev == sdata->dev) 604 return sdata; 605 } 606 607 return NULL; 608 } 609 610 return rcu_dereference(local->p2p_sdata); 611 } 612 613 static void ieee80211_report_ack_skb(struct ieee80211_local *local, 614 struct ieee80211_tx_info *info, 615 bool acked, bool dropped) 616 { 617 struct sk_buff *skb; 618 unsigned long flags; 619 620 spin_lock_irqsave(&local->ack_status_lock, flags); 621 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id); 622 spin_unlock_irqrestore(&local->ack_status_lock, flags); 623 624 if (!skb) 625 return; 626 627 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { 628 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; 629 struct ieee80211_sub_if_data *sdata; 630 struct ieee80211_hdr *hdr = (void *)skb->data; 631 632 rcu_read_lock(); 633 sdata = ieee80211_sdata_from_skb(local, skb); 634 if (sdata) { 635 if (skb->protocol == sdata->control_port_protocol || 636 skb->protocol == cpu_to_be16(ETH_P_PREAUTH)) 637 cfg80211_control_port_tx_status(&sdata->wdev, 638 cookie, 639 skb->data, 640 skb->len, 641 acked, 642 GFP_ATOMIC); 643 else if (ieee80211_is_any_nullfunc(hdr->frame_control)) 644 cfg80211_probe_status(sdata->dev, hdr->addr1, 645 cookie, acked, 646 info->status.ack_signal, 647 info->status.is_valid_ack_signal, 648 GFP_ATOMIC); 649 else if (ieee80211_is_mgmt(hdr->frame_control)) 650 cfg80211_mgmt_tx_status(&sdata->wdev, cookie, 651 skb->data, skb->len, 652 acked, GFP_ATOMIC); 653 else 654 pr_warn("Unknown status report in ack skb\n"); 655 656 } 657 rcu_read_unlock(); 658 659 dev_kfree_skb_any(skb); 660 } else if (dropped) { 661 dev_kfree_skb_any(skb); 662 } else { 663 /* consumes skb */ 664 skb_complete_wifi_ack(skb, acked); 665 } 666 } 667 668 static void ieee80211_report_used_skb(struct ieee80211_local *local, 669 struct sk_buff *skb, bool dropped) 670 { 671 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 672 u16 tx_time_est = ieee80211_info_get_tx_time_est(info); 673 struct ieee80211_hdr *hdr = (void *)skb->data; 674 bool acked = info->flags & IEEE80211_TX_STAT_ACK; 675 676 if (dropped) 677 acked = false; 678 679 if (tx_time_est) { 680 struct sta_info *sta; 681 682 rcu_read_lock(); 683 684 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 685 ieee80211_sta_update_pending_airtime(local, sta, 686 skb_get_queue_mapping(skb), 687 tx_time_est, 688 true); 689 rcu_read_unlock(); 690 } 691 692 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { 693 struct ieee80211_sub_if_data *sdata; 694 695 rcu_read_lock(); 696 697 sdata = ieee80211_sdata_from_skb(local, skb); 698 699 if (!sdata) { 700 skb->dev = NULL; 701 } else { 702 unsigned int hdr_size = 703 ieee80211_hdrlen(hdr->frame_control); 704 705 /* Check to see if packet is a TDLS teardown packet */ 706 if (ieee80211_is_data(hdr->frame_control) && 707 (ieee80211_get_tdls_action(skb, hdr_size) == 708 WLAN_TDLS_TEARDOWN)) 709 ieee80211_tdls_td_tx_handle(local, sdata, skb, 710 info->flags); 711 else 712 ieee80211_mgd_conn_tx_status(sdata, 713 hdr->frame_control, 714 acked); 715 } 716 717 rcu_read_unlock(); 718 } else if (info->ack_frame_id) { 719 ieee80211_report_ack_skb(local, info, acked, dropped); 720 } 721 722 if (!dropped && skb->destructor) { 723 skb->wifi_acked_valid = 1; 724 skb->wifi_acked = acked; 725 } 726 727 ieee80211_led_tx(local); 728 729 if (skb_has_frag_list(skb)) { 730 kfree_skb_list(skb_shinfo(skb)->frag_list); 731 skb_shinfo(skb)->frag_list = NULL; 732 } 733 } 734 735 /* 736 * Use a static threshold for now, best value to be determined 737 * by testing ... 738 * Should it depend on: 739 * - on # of retransmissions 740 * - current throughput (higher value for higher tpt)? 741 */ 742 #define STA_LOST_PKT_THRESHOLD 50 743 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */ 744 #define STA_LOST_TDLS_PKT_THRESHOLD 10 745 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ 746 747 static void ieee80211_lost_packet(struct sta_info *sta, 748 struct ieee80211_tx_info *info) 749 { 750 unsigned long pkt_time = STA_LOST_PKT_TIME; 751 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD; 752 753 /* If driver relies on its own algorithm for station kickout, skip 754 * mac80211 packet loss mechanism. 755 */ 756 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) 757 return; 758 759 /* This packet was aggregated but doesn't carry status info */ 760 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 761 !(info->flags & IEEE80211_TX_STAT_AMPDU)) 762 return; 763 764 sta->status_stats.lost_packets++; 765 if (sta->sta.tdls) { 766 pkt_time = STA_LOST_TDLS_PKT_TIME; 767 pkt_thr = STA_LOST_PKT_THRESHOLD; 768 } 769 770 /* 771 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD 772 * of the last packets were lost, and that no ACK was received in the 773 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss 774 * mechanism. 775 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME 776 */ 777 if (sta->status_stats.lost_packets < pkt_thr || 778 !time_after(jiffies, sta->status_stats.last_pkt_time + pkt_time)) 779 return; 780 781 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 782 sta->status_stats.lost_packets, GFP_ATOMIC); 783 sta->status_stats.lost_packets = 0; 784 } 785 786 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 787 struct ieee80211_tx_info *info, 788 int *retry_count) 789 { 790 int count = -1; 791 int i; 792 793 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 794 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 795 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 796 /* just the first aggr frame carry status info */ 797 info->status.rates[i].idx = -1; 798 info->status.rates[i].count = 0; 799 break; 800 } else if (info->status.rates[i].idx < 0) { 801 break; 802 } else if (i >= hw->max_report_rates) { 803 /* the HW cannot have attempted that rate */ 804 info->status.rates[i].idx = -1; 805 info->status.rates[i].count = 0; 806 break; 807 } 808 809 count += info->status.rates[i].count; 810 } 811 812 if (count < 0) 813 count = 0; 814 815 *retry_count = count; 816 return i - 1; 817 } 818 819 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 820 struct ieee80211_supported_band *sband, 821 int retry_count, int shift, bool send_to_cooked, 822 struct ieee80211_tx_status *status) 823 { 824 struct sk_buff *skb2; 825 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 826 struct ieee80211_sub_if_data *sdata; 827 struct net_device *prev_dev = NULL; 828 int rtap_len; 829 830 /* send frame to monitor interfaces now */ 831 rtap_len = ieee80211_tx_radiotap_len(info, status); 832 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 833 pr_err("ieee80211_tx_status: headroom too small\n"); 834 dev_kfree_skb(skb); 835 return; 836 } 837 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, 838 rtap_len, shift, status); 839 840 /* XXX: is this sufficient for BPF? */ 841 skb_reset_mac_header(skb); 842 skb->ip_summed = CHECKSUM_UNNECESSARY; 843 skb->pkt_type = PACKET_OTHERHOST; 844 skb->protocol = htons(ETH_P_802_2); 845 memset(skb->cb, 0, sizeof(skb->cb)); 846 847 rcu_read_lock(); 848 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 849 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 850 if (!ieee80211_sdata_running(sdata)) 851 continue; 852 853 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && 854 !send_to_cooked) 855 continue; 856 857 if (prev_dev) { 858 skb2 = skb_clone(skb, GFP_ATOMIC); 859 if (skb2) { 860 skb2->dev = prev_dev; 861 netif_rx(skb2); 862 } 863 } 864 865 prev_dev = sdata->dev; 866 } 867 } 868 if (prev_dev) { 869 skb->dev = prev_dev; 870 netif_rx(skb); 871 skb = NULL; 872 } 873 rcu_read_unlock(); 874 dev_kfree_skb(skb); 875 } 876 877 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 878 struct ieee80211_tx_status *status, 879 int rates_idx, int retry_count) 880 { 881 struct sk_buff *skb = status->skb; 882 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 883 struct ieee80211_local *local = hw_to_local(hw); 884 struct ieee80211_tx_info *info = status->info; 885 struct sta_info *sta; 886 __le16 fc; 887 struct ieee80211_supported_band *sband; 888 bool send_to_cooked; 889 bool acked; 890 bool noack_success; 891 struct ieee80211_bar *bar; 892 int shift = 0; 893 int tid = IEEE80211_NUM_TIDS; 894 895 sband = local->hw.wiphy->bands[info->band]; 896 fc = hdr->frame_control; 897 898 if (status->sta) { 899 sta = container_of(status->sta, struct sta_info, sta); 900 shift = ieee80211_vif_get_shift(&sta->sdata->vif); 901 902 if (info->flags & IEEE80211_TX_STATUS_EOSP) 903 clear_sta_flag(sta, WLAN_STA_SP); 904 905 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 906 noack_success = !!(info->flags & 907 IEEE80211_TX_STAT_NOACK_TRANSMITTED); 908 909 /* mesh Peer Service Period support */ 910 if (ieee80211_vif_is_mesh(&sta->sdata->vif) && 911 ieee80211_is_data_qos(fc)) 912 ieee80211_mpsp_trigger_process( 913 ieee80211_get_qos_ctl(hdr), sta, true, acked); 914 915 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && 916 (ieee80211_is_data(hdr->frame_control)) && 917 (rates_idx != -1)) 918 sta->tx_stats.last_rate = 919 info->status.rates[rates_idx]; 920 921 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 922 (ieee80211_is_data_qos(fc))) { 923 u16 ssn; 924 u8 *qc; 925 926 qc = ieee80211_get_qos_ctl(hdr); 927 tid = qc[0] & 0xf; 928 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 929 & IEEE80211_SCTL_SEQ); 930 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, 931 tid, ssn); 932 } else if (ieee80211_is_data_qos(fc)) { 933 u8 *qc = ieee80211_get_qos_ctl(hdr); 934 935 tid = qc[0] & 0xf; 936 } 937 938 if (!acked && ieee80211_is_back_req(fc)) { 939 u16 control; 940 941 /* 942 * BAR failed, store the last SSN and retry sending 943 * the BAR when the next unicast transmission on the 944 * same TID succeeds. 945 */ 946 bar = (struct ieee80211_bar *) skb->data; 947 control = le16_to_cpu(bar->control); 948 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { 949 u16 ssn = le16_to_cpu(bar->start_seq_num); 950 951 tid = (control & 952 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 953 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 954 955 ieee80211_set_bar_pending(sta, tid, ssn); 956 } 957 } 958 959 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 960 ieee80211_handle_filtered_frame(local, sta, skb); 961 return; 962 } else if (ieee80211_is_data_present(fc)) { 963 if (!acked && !noack_success) 964 sta->status_stats.msdu_failed[tid]++; 965 966 sta->status_stats.msdu_retries[tid] += 967 retry_count; 968 } 969 970 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) 971 ieee80211_frame_acked(sta, skb); 972 973 } else if (wiphy_ext_feature_isset(local->hw.wiphy, 974 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS)) { 975 struct ieee80211_sub_if_data *sdata; 976 struct ieee80211_txq *txq; 977 u32 airtime; 978 979 /* Account airtime to multicast queue */ 980 sdata = ieee80211_sdata_from_skb(local, skb); 981 982 if (sdata && (txq = sdata->vif.txq)) { 983 airtime = info->status.tx_time ?: 984 ieee80211_calc_expected_tx_airtime(hw, 985 &sdata->vif, 986 NULL, 987 skb->len, 988 false); 989 990 ieee80211_register_airtime(txq, airtime, 0); 991 } 992 } 993 994 /* SNMP counters 995 * Fragments are passed to low-level drivers as separate skbs, so these 996 * are actually fragments, not frames. Update frame counters only for 997 * the first fragment of the frame. */ 998 if ((info->flags & IEEE80211_TX_STAT_ACK) || 999 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 1000 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 1001 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1002 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 1003 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1004 if (retry_count > 0) 1005 I802_DEBUG_INC(local->dot11RetryCount); 1006 if (retry_count > 1) 1007 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1008 } 1009 1010 /* This counter shall be incremented for an acknowledged MPDU 1011 * with an individual address in the address 1 field or an MPDU 1012 * with a multicast address in the address 1 field of type Data 1013 * or Management. */ 1014 if (!is_multicast_ether_addr(hdr->addr1) || 1015 ieee80211_is_data(fc) || 1016 ieee80211_is_mgmt(fc)) 1017 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1018 } else { 1019 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1020 I802_DEBUG_INC(local->dot11FailedCount); 1021 } 1022 1023 if (ieee80211_is_any_nullfunc(fc) && 1024 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 mod_timer(&local->dynamic_ps_timer, 1032 jiffies + msecs_to_jiffies(10)); 1033 } 1034 1035 ieee80211_report_used_skb(local, skb, false); 1036 1037 /* this was a transmitted frame, but now we want to reuse it */ 1038 skb_orphan(skb); 1039 1040 /* Need to make a copy before skb->cb gets cleared */ 1041 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || 1042 !(ieee80211_is_data(fc)); 1043 1044 /* 1045 * This is a bit racy but we can avoid a lot of work 1046 * with this test... 1047 */ 1048 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { 1049 if (status->free_list) 1050 list_add_tail(&skb->list, status->free_list); 1051 else 1052 dev_kfree_skb(skb); 1053 return; 1054 } 1055 1056 /* send to monitor interfaces */ 1057 ieee80211_tx_monitor(local, skb, sband, retry_count, shift, 1058 send_to_cooked, status); 1059 } 1060 1061 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1062 { 1063 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1064 struct ieee80211_local *local = hw_to_local(hw); 1065 struct ieee80211_tx_status status = { 1066 .skb = skb, 1067 .info = IEEE80211_SKB_CB(skb), 1068 }; 1069 struct sta_info *sta; 1070 1071 rcu_read_lock(); 1072 1073 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 1074 if (sta) 1075 status.sta = &sta->sta; 1076 1077 ieee80211_tx_status_ext(hw, &status); 1078 rcu_read_unlock(); 1079 } 1080 EXPORT_SYMBOL(ieee80211_tx_status); 1081 1082 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1083 struct ieee80211_tx_status *status) 1084 { 1085 struct ieee80211_local *local = hw_to_local(hw); 1086 struct ieee80211_tx_info *info = status->info; 1087 struct ieee80211_sta *pubsta = status->sta; 1088 struct sk_buff *skb = status->skb; 1089 struct ieee80211_supported_band *sband; 1090 struct sta_info *sta = NULL; 1091 int rates_idx, retry_count; 1092 bool acked, noack_success; 1093 u16 tx_time_est; 1094 1095 if (pubsta) { 1096 sta = container_of(pubsta, struct sta_info, sta); 1097 1098 if (status->rate) 1099 sta->tx_stats.last_rate_info = *status->rate; 1100 } 1101 1102 if (skb && (tx_time_est = 1103 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) { 1104 /* Do this here to avoid the expensive lookup of the sta 1105 * in ieee80211_report_used_skb(). 1106 */ 1107 ieee80211_sta_update_pending_airtime(local, sta, 1108 skb_get_queue_mapping(skb), 1109 tx_time_est, 1110 true); 1111 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0); 1112 } 1113 1114 if (!status->info) 1115 goto free; 1116 1117 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 1118 1119 sband = hw->wiphy->bands[info->band]; 1120 1121 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1122 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1123 1124 if (pubsta) { 1125 struct ieee80211_sub_if_data *sdata = sta->sdata; 1126 1127 if (!acked && !noack_success) 1128 sta->status_stats.retry_failed++; 1129 sta->status_stats.retry_count += retry_count; 1130 1131 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 1132 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1133 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1134 ieee80211_sta_tx_notify(sdata, (void *) skb->data, 1135 acked, info->status.tx_time); 1136 1137 if (acked) { 1138 sta->status_stats.last_ack = jiffies; 1139 1140 if (sta->status_stats.lost_packets) 1141 sta->status_stats.lost_packets = 0; 1142 1143 /* Track when last packet was ACKed */ 1144 sta->status_stats.last_pkt_time = jiffies; 1145 1146 /* Reset connection monitor */ 1147 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1148 unlikely(sdata->u.mgd.probe_send_count > 0)) 1149 sdata->u.mgd.probe_send_count = 0; 1150 1151 if (info->status.is_valid_ack_signal) { 1152 sta->status_stats.last_ack_signal = 1153 (s8)info->status.ack_signal; 1154 sta->status_stats.ack_signal_filled = true; 1155 ewma_avg_signal_add(&sta->status_stats.avg_ack_signal, 1156 -info->status.ack_signal); 1157 } 1158 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1159 /* 1160 * The STA is in power save mode, so assume 1161 * that this TX packet failed because of that. 1162 */ 1163 if (skb) 1164 ieee80211_handle_filtered_frame(local, sta, skb); 1165 return; 1166 } else if (noack_success) { 1167 /* nothing to do here, do not account as lost */ 1168 } else { 1169 ieee80211_lost_packet(sta, info); 1170 } 1171 } 1172 1173 rate_control_tx_status(local, sband, status); 1174 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1175 ieee80211s_update_metric(local, sta, status); 1176 } 1177 1178 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1179 return __ieee80211_tx_status(hw, status, rates_idx, 1180 retry_count); 1181 1182 if (acked || noack_success) { 1183 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1184 if (!pubsta) 1185 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1186 if (retry_count > 0) 1187 I802_DEBUG_INC(local->dot11RetryCount); 1188 if (retry_count > 1) 1189 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1190 } else { 1191 I802_DEBUG_INC(local->dot11FailedCount); 1192 } 1193 1194 free: 1195 if (!skb) 1196 return; 1197 1198 ieee80211_report_used_skb(local, skb, false); 1199 if (status->free_list) 1200 list_add_tail(&skb->list, status->free_list); 1201 else 1202 dev_kfree_skb(skb); 1203 } 1204 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1205 1206 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1207 struct ieee80211_sta *pubsta, 1208 struct ieee80211_tx_info *info) 1209 { 1210 struct ieee80211_local *local = hw_to_local(hw); 1211 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band]; 1212 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1213 struct ieee80211_tx_status status = { 1214 .info = info, 1215 .sta = pubsta, 1216 }; 1217 1218 rate_control_tx_status(local, sband, &status); 1219 1220 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1221 sta->tx_stats.last_rate = info->status.rates[0]; 1222 } 1223 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1224 1225 void ieee80211_tx_status_8023(struct ieee80211_hw *hw, 1226 struct ieee80211_vif *vif, 1227 struct sk_buff *skb) 1228 { 1229 struct ieee80211_sub_if_data *sdata; 1230 struct ieee80211_tx_status status = { 1231 .skb = skb, 1232 .info = IEEE80211_SKB_CB(skb), 1233 }; 1234 struct sta_info *sta; 1235 1236 sdata = vif_to_sdata(vif); 1237 1238 rcu_read_lock(); 1239 1240 if (!ieee80211_lookup_ra_sta(sdata, skb, &sta) && !IS_ERR(sta)) 1241 status.sta = &sta->sta; 1242 1243 ieee80211_tx_status_ext(hw, &status); 1244 1245 rcu_read_unlock(); 1246 } 1247 EXPORT_SYMBOL(ieee80211_tx_status_8023); 1248 1249 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1250 { 1251 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1252 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1253 num_packets, GFP_ATOMIC); 1254 } 1255 EXPORT_SYMBOL(ieee80211_report_low_ack); 1256 1257 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1258 { 1259 struct ieee80211_local *local = hw_to_local(hw); 1260 1261 ieee80211_report_used_skb(local, skb, true); 1262 dev_kfree_skb_any(skb); 1263 } 1264 EXPORT_SYMBOL(ieee80211_free_txskb); 1265 1266 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1267 struct sk_buff_head *skbs) 1268 { 1269 struct sk_buff *skb; 1270 1271 while ((skb = __skb_dequeue(skbs))) 1272 ieee80211_free_txskb(hw, skb); 1273 } 1274