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->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING; 70 info->flags |= 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; 187 188 if (ieee80211_is_data_qos(mgmt->frame_control)) { 189 struct ieee80211_hdr *hdr = (void *) skb->data; 190 u8 *qc = ieee80211_get_qos_ctl(hdr); 191 u16 tid = qc[0] & 0xf; 192 193 ieee80211_check_pending_bar(sta, hdr->addr1, tid); 194 } 195 196 if (ieee80211_is_action(mgmt->frame_control) && 197 !ieee80211_has_protected(mgmt->frame_control) && 198 mgmt->u.action.category == WLAN_CATEGORY_HT && 199 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && 200 ieee80211_sdata_running(sdata)) { 201 enum ieee80211_smps_mode smps_mode; 202 203 switch (mgmt->u.action.u.ht_smps.smps_control) { 204 case WLAN_HT_SMPS_CONTROL_DYNAMIC: 205 smps_mode = IEEE80211_SMPS_DYNAMIC; 206 break; 207 case WLAN_HT_SMPS_CONTROL_STATIC: 208 smps_mode = IEEE80211_SMPS_STATIC; 209 break; 210 case WLAN_HT_SMPS_CONTROL_DISABLED: 211 default: /* shouldn't happen since we don't send that */ 212 smps_mode = IEEE80211_SMPS_OFF; 213 break; 214 } 215 216 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 217 /* 218 * This update looks racy, but isn't -- if we come 219 * here we've definitely got a station that we're 220 * talking to, and on a managed interface that can 221 * only be the AP. And the only other place updating 222 * this variable in managed mode is before association. 223 */ 224 sdata->smps_mode = smps_mode; 225 ieee80211_queue_work(&local->hw, &sdata->recalc_smps); 226 } else if (sdata->vif.type == NL80211_IFTYPE_AP || 227 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 228 sta->known_smps_mode = smps_mode; 229 } 230 } 231 } 232 233 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) 234 { 235 struct tid_ampdu_tx *tid_tx; 236 237 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 238 if (!tid_tx) 239 return; 240 241 tid_tx->failed_bar_ssn = ssn; 242 tid_tx->bar_pending = true; 243 } 244 245 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info, 246 struct ieee80211_tx_status *status) 247 { 248 int len = sizeof(struct ieee80211_radiotap_header); 249 250 /* IEEE80211_RADIOTAP_RATE rate */ 251 if (status && status->rate && !(status->rate->flags & 252 (RATE_INFO_FLAGS_MCS | 253 RATE_INFO_FLAGS_DMG | 254 RATE_INFO_FLAGS_EDMG | 255 RATE_INFO_FLAGS_VHT_MCS | 256 RATE_INFO_FLAGS_HE_MCS))) 257 len += 2; 258 else if (info->status.rates[0].idx >= 0 && 259 !(info->status.rates[0].flags & 260 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))) 261 len += 2; 262 263 /* IEEE80211_RADIOTAP_TX_FLAGS */ 264 len += 2; 265 266 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 267 len += 1; 268 269 /* IEEE80211_RADIOTAP_MCS 270 * IEEE80211_RADIOTAP_VHT */ 271 if (status && status->rate) { 272 if (status->rate->flags & RATE_INFO_FLAGS_MCS) 273 len += 3; 274 else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS) 275 len = ALIGN(len, 2) + 12; 276 else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS) 277 len = ALIGN(len, 2) + 12; 278 } else if (info->status.rates[0].idx >= 0) { 279 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) 280 len += 3; 281 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) 282 len = ALIGN(len, 2) + 12; 283 } 284 285 return len; 286 } 287 288 static void 289 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, 290 struct ieee80211_supported_band *sband, 291 struct sk_buff *skb, int retry_count, 292 int rtap_len, int shift, 293 struct ieee80211_tx_status *status) 294 { 295 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 296 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 297 struct ieee80211_radiotap_header *rthdr; 298 unsigned char *pos; 299 u16 legacy_rate = 0; 300 u16 txflags; 301 302 rthdr = skb_push(skb, rtap_len); 303 304 memset(rthdr, 0, rtap_len); 305 rthdr->it_len = cpu_to_le16(rtap_len); 306 rthdr->it_present = 307 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | 308 (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); 309 pos = (unsigned char *)(rthdr + 1); 310 311 /* 312 * XXX: Once radiotap gets the bitmap reset thing the vendor 313 * extensions proposal contains, we can actually report 314 * the whole set of tries we did. 315 */ 316 317 /* IEEE80211_RADIOTAP_RATE */ 318 319 if (status && status->rate) { 320 if (!(status->rate->flags & (RATE_INFO_FLAGS_MCS | 321 RATE_INFO_FLAGS_DMG | 322 RATE_INFO_FLAGS_EDMG | 323 RATE_INFO_FLAGS_VHT_MCS | 324 RATE_INFO_FLAGS_HE_MCS))) 325 legacy_rate = status->rate->legacy; 326 } else if (info->status.rates[0].idx >= 0 && 327 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | 328 IEEE80211_TX_RC_VHT_MCS))) 329 legacy_rate = 330 sband->bitrates[info->status.rates[0].idx].bitrate; 331 332 if (legacy_rate) { 333 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); 334 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift)); 335 /* padding for tx flags */ 336 pos += 2; 337 } 338 339 /* IEEE80211_RADIOTAP_TX_FLAGS */ 340 txflags = 0; 341 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 342 !is_multicast_ether_addr(hdr->addr1)) 343 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; 344 345 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 346 txflags |= IEEE80211_RADIOTAP_F_TX_CTS; 347 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) 348 txflags |= IEEE80211_RADIOTAP_F_TX_RTS; 349 350 put_unaligned_le16(txflags, pos); 351 pos += 2; 352 353 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 354 /* for now report the total retry_count */ 355 *pos = retry_count; 356 pos++; 357 358 if (status && status->rate && 359 (status->rate->flags & RATE_INFO_FLAGS_MCS)) { 360 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); 361 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 362 IEEE80211_RADIOTAP_MCS_HAVE_GI | 363 IEEE80211_RADIOTAP_MCS_HAVE_BW; 364 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI) 365 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 366 if (status->rate->bw == RATE_INFO_BW_40) 367 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 368 pos[2] = status->rate->mcs; 369 pos += 3; 370 } else if (status && status->rate && 371 (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) { 372 u16 known = local->hw.radiotap_vht_details & 373 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 374 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 375 376 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); 377 378 /* required alignment from rthdr */ 379 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 380 381 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 382 put_unaligned_le16(known, pos); 383 pos += 2; 384 385 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 386 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI) 387 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 388 pos++; 389 390 /* u8 bandwidth */ 391 switch (status->rate->bw) { 392 case RATE_INFO_BW_160: 393 *pos = 11; 394 break; 395 case RATE_INFO_BW_80: 396 *pos = 4; 397 break; 398 case RATE_INFO_BW_40: 399 *pos = 1; 400 break; 401 default: 402 *pos = 0; 403 break; 404 } 405 pos++; 406 407 /* u8 mcs_nss[4] */ 408 *pos = (status->rate->mcs << 4) | status->rate->nss; 409 pos += 4; 410 411 /* u8 coding */ 412 pos++; 413 /* u8 group_id */ 414 pos++; 415 /* u16 partial_aid */ 416 pos += 2; 417 } else if (status && status->rate && 418 (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) { 419 struct ieee80211_radiotap_he *he; 420 421 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE); 422 423 /* required alignment from rthdr */ 424 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 425 he = (struct ieee80211_radiotap_he *)pos; 426 427 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU | 428 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 429 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 430 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 431 432 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN); 433 434 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f) 435 436 he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss); 437 438 #define CHECK_GI(s) \ 439 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \ 440 (int)NL80211_RATE_INFO_HE_GI_##s) 441 442 CHECK_GI(0_8); 443 CHECK_GI(1_6); 444 CHECK_GI(3_2); 445 446 he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs); 447 he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm); 448 449 he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi); 450 451 switch (status->rate->bw) { 452 case RATE_INFO_BW_20: 453 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 454 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ); 455 break; 456 case RATE_INFO_BW_40: 457 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 458 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ); 459 break; 460 case RATE_INFO_BW_80: 461 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 462 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ); 463 break; 464 case RATE_INFO_BW_160: 465 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 466 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ); 467 break; 468 case RATE_INFO_BW_HE_RU: 469 #define CHECK_RU_ALLOC(s) \ 470 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \ 471 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4) 472 473 CHECK_RU_ALLOC(26); 474 CHECK_RU_ALLOC(52); 475 CHECK_RU_ALLOC(106); 476 CHECK_RU_ALLOC(242); 477 CHECK_RU_ALLOC(484); 478 CHECK_RU_ALLOC(996); 479 CHECK_RU_ALLOC(2x996); 480 481 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 482 status->rate->he_ru_alloc + 4); 483 break; 484 default: 485 WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw); 486 } 487 488 pos += sizeof(struct ieee80211_radiotap_he); 489 } 490 491 if ((status && status->rate) || info->status.rates[0].idx < 0) 492 return; 493 494 /* IEEE80211_RADIOTAP_MCS 495 * IEEE80211_RADIOTAP_VHT */ 496 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { 497 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); 498 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 499 IEEE80211_RADIOTAP_MCS_HAVE_GI | 500 IEEE80211_RADIOTAP_MCS_HAVE_BW; 501 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 502 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 503 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 504 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 505 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) 506 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; 507 pos[2] = info->status.rates[0].idx; 508 pos += 3; 509 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { 510 u16 known = local->hw.radiotap_vht_details & 511 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 512 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 513 514 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); 515 516 /* required alignment from rthdr */ 517 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 518 519 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 520 put_unaligned_le16(known, pos); 521 pos += 2; 522 523 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 524 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 525 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 526 pos++; 527 528 /* u8 bandwidth */ 529 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 530 *pos = 1; 531 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 532 *pos = 4; 533 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 534 *pos = 11; 535 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ 536 *pos = 0; 537 pos++; 538 539 /* u8 mcs_nss[4] */ 540 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | 541 ieee80211_rate_get_vht_nss(&info->status.rates[0]); 542 pos += 4; 543 544 /* u8 coding */ 545 pos++; 546 /* u8 group_id */ 547 pos++; 548 /* u16 partial_aid */ 549 pos += 2; 550 } 551 } 552 553 /* 554 * Handles the tx for TDLS teardown frames. 555 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP 556 */ 557 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, 558 struct ieee80211_sub_if_data *sdata, 559 struct sk_buff *skb, u32 flags) 560 { 561 struct sk_buff *teardown_skb; 562 struct sk_buff *orig_teardown_skb; 563 bool is_teardown = false; 564 565 /* Get the teardown data we need and free the lock */ 566 spin_lock(&sdata->u.mgd.teardown_lock); 567 teardown_skb = sdata->u.mgd.teardown_skb; 568 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; 569 if ((skb == orig_teardown_skb) && teardown_skb) { 570 sdata->u.mgd.teardown_skb = NULL; 571 sdata->u.mgd.orig_teardown_skb = NULL; 572 is_teardown = true; 573 } 574 spin_unlock(&sdata->u.mgd.teardown_lock); 575 576 if (is_teardown) { 577 /* This mechanism relies on being able to get ACKs */ 578 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); 579 580 /* Check if peer has ACKed */ 581 if (flags & IEEE80211_TX_STAT_ACK) { 582 dev_kfree_skb_any(teardown_skb); 583 } else { 584 tdls_dbg(sdata, 585 "TDLS Resending teardown through AP\n"); 586 587 ieee80211_subif_start_xmit(teardown_skb, skb->dev); 588 } 589 } 590 } 591 592 static struct ieee80211_sub_if_data * 593 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) 594 { 595 struct ieee80211_sub_if_data *sdata; 596 597 if (skb->dev) { 598 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 599 if (!sdata->dev) 600 continue; 601 602 if (skb->dev == sdata->dev) 603 return sdata; 604 } 605 606 return NULL; 607 } 608 609 return rcu_dereference(local->p2p_sdata); 610 } 611 612 static void ieee80211_report_ack_skb(struct ieee80211_local *local, 613 struct ieee80211_tx_info *info, 614 bool acked, bool dropped) 615 { 616 struct sk_buff *skb; 617 unsigned long flags; 618 619 spin_lock_irqsave(&local->ack_status_lock, flags); 620 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id); 621 spin_unlock_irqrestore(&local->ack_status_lock, flags); 622 623 if (!skb) 624 return; 625 626 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { 627 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; 628 struct ieee80211_sub_if_data *sdata; 629 struct ieee80211_hdr *hdr = (void *)skb->data; 630 __be16 ethertype = 0; 631 632 if (skb->len >= ETH_HLEN && skb->protocol == cpu_to_be16(ETH_P_802_3)) 633 skb_copy_bits(skb, 2 * ETH_ALEN, ðertype, ETH_TLEN); 634 635 rcu_read_lock(); 636 sdata = ieee80211_sdata_from_skb(local, skb); 637 if (sdata) { 638 if (ethertype == sdata->control_port_protocol || 639 ethertype == cpu_to_be16(ETH_P_PREAUTH)) 640 cfg80211_control_port_tx_status(&sdata->wdev, 641 cookie, 642 skb->data, 643 skb->len, 644 acked, 645 GFP_ATOMIC); 646 else if (ieee80211_is_any_nullfunc(hdr->frame_control)) 647 cfg80211_probe_status(sdata->dev, hdr->addr1, 648 cookie, acked, 649 info->status.ack_signal, 650 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 pr_warn("Unknown status report in ack skb\n"); 658 659 } 660 rcu_read_unlock(); 661 662 dev_kfree_skb_any(skb); 663 } else if (dropped) { 664 dev_kfree_skb_any(skb); 665 } else { 666 /* consumes skb */ 667 skb_complete_wifi_ack(skb, acked); 668 } 669 } 670 671 static void ieee80211_report_used_skb(struct ieee80211_local *local, 672 struct sk_buff *skb, bool dropped) 673 { 674 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 675 u16 tx_time_est = ieee80211_info_get_tx_time_est(info); 676 struct ieee80211_hdr *hdr = (void *)skb->data; 677 bool acked = info->flags & IEEE80211_TX_STAT_ACK; 678 679 if (dropped) 680 acked = false; 681 682 if (tx_time_est) { 683 struct sta_info *sta; 684 685 rcu_read_lock(); 686 687 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 688 ieee80211_sta_update_pending_airtime(local, sta, 689 skb_get_queue_mapping(skb), 690 tx_time_est, 691 true); 692 rcu_read_unlock(); 693 } 694 695 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { 696 struct ieee80211_sub_if_data *sdata; 697 698 rcu_read_lock(); 699 700 sdata = ieee80211_sdata_from_skb(local, skb); 701 702 if (!sdata) { 703 skb->dev = NULL; 704 } else { 705 unsigned int hdr_size = 706 ieee80211_hdrlen(hdr->frame_control); 707 708 /* Check to see if packet is a TDLS teardown packet */ 709 if (ieee80211_is_data(hdr->frame_control) && 710 (ieee80211_get_tdls_action(skb, hdr_size) == 711 WLAN_TDLS_TEARDOWN)) 712 ieee80211_tdls_td_tx_handle(local, sdata, skb, 713 info->flags); 714 else 715 ieee80211_mgd_conn_tx_status(sdata, 716 hdr->frame_control, 717 acked); 718 } 719 720 rcu_read_unlock(); 721 } else if (info->ack_frame_id) { 722 ieee80211_report_ack_skb(local, info, acked, dropped); 723 } 724 725 if (!dropped && skb->destructor) { 726 skb->wifi_acked_valid = 1; 727 skb->wifi_acked = acked; 728 } 729 730 ieee80211_led_tx(local); 731 732 if (skb_has_frag_list(skb)) { 733 kfree_skb_list(skb_shinfo(skb)->frag_list); 734 skb_shinfo(skb)->frag_list = NULL; 735 } 736 } 737 738 /* 739 * Use a static threshold for now, best value to be determined 740 * by testing ... 741 * Should it depend on: 742 * - on # of retransmissions 743 * - current throughput (higher value for higher tpt)? 744 */ 745 #define STA_LOST_PKT_THRESHOLD 50 746 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */ 747 #define STA_LOST_TDLS_PKT_THRESHOLD 10 748 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ 749 750 static void ieee80211_lost_packet(struct sta_info *sta, 751 struct ieee80211_tx_info *info) 752 { 753 unsigned long pkt_time = STA_LOST_PKT_TIME; 754 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD; 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 pkt_time = STA_LOST_TDLS_PKT_TIME; 770 pkt_thr = STA_LOST_PKT_THRESHOLD; 771 } 772 773 /* 774 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD 775 * of the last packets were lost, and that no ACK was received in the 776 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss 777 * mechanism. 778 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME 779 */ 780 if (sta->status_stats.lost_packets < pkt_thr || 781 !time_after(jiffies, sta->status_stats.last_pkt_time + pkt_time)) 782 return; 783 784 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 785 sta->status_stats.lost_packets, GFP_ATOMIC); 786 sta->status_stats.lost_packets = 0; 787 } 788 789 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 790 struct ieee80211_tx_info *info, 791 int *retry_count) 792 { 793 int count = -1; 794 int i; 795 796 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 797 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 798 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 799 /* just the first aggr frame carry status info */ 800 info->status.rates[i].idx = -1; 801 info->status.rates[i].count = 0; 802 break; 803 } else if (info->status.rates[i].idx < 0) { 804 break; 805 } else if (i >= hw->max_report_rates) { 806 /* the HW cannot have attempted that rate */ 807 info->status.rates[i].idx = -1; 808 info->status.rates[i].count = 0; 809 break; 810 } 811 812 count += info->status.rates[i].count; 813 } 814 815 if (count < 0) 816 count = 0; 817 818 *retry_count = count; 819 return i - 1; 820 } 821 822 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 823 struct ieee80211_supported_band *sband, 824 int retry_count, int shift, bool send_to_cooked, 825 struct ieee80211_tx_status *status) 826 { 827 struct sk_buff *skb2; 828 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 829 struct ieee80211_sub_if_data *sdata; 830 struct net_device *prev_dev = NULL; 831 int rtap_len; 832 833 /* send frame to monitor interfaces now */ 834 rtap_len = ieee80211_tx_radiotap_len(info, status); 835 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 836 pr_err("ieee80211_tx_status: headroom too small\n"); 837 dev_kfree_skb(skb); 838 return; 839 } 840 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, 841 rtap_len, shift, status); 842 843 /* XXX: is this sufficient for BPF? */ 844 skb_reset_mac_header(skb); 845 skb->ip_summed = CHECKSUM_UNNECESSARY; 846 skb->pkt_type = PACKET_OTHERHOST; 847 skb->protocol = htons(ETH_P_802_2); 848 memset(skb->cb, 0, sizeof(skb->cb)); 849 850 rcu_read_lock(); 851 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 852 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 853 if (!ieee80211_sdata_running(sdata)) 854 continue; 855 856 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && 857 !send_to_cooked) 858 continue; 859 860 if (prev_dev) { 861 skb2 = skb_clone(skb, GFP_ATOMIC); 862 if (skb2) { 863 skb2->dev = prev_dev; 864 netif_rx(skb2); 865 } 866 } 867 868 prev_dev = sdata->dev; 869 } 870 } 871 if (prev_dev) { 872 skb->dev = prev_dev; 873 netif_rx(skb); 874 skb = NULL; 875 } 876 rcu_read_unlock(); 877 dev_kfree_skb(skb); 878 } 879 880 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 881 struct ieee80211_tx_status *status, 882 int rates_idx, int retry_count) 883 { 884 struct sk_buff *skb = status->skb; 885 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 886 struct ieee80211_local *local = hw_to_local(hw); 887 struct ieee80211_tx_info *info = status->info; 888 struct sta_info *sta; 889 __le16 fc; 890 struct ieee80211_supported_band *sband; 891 bool send_to_cooked; 892 bool acked; 893 bool noack_success; 894 struct ieee80211_bar *bar; 895 int shift = 0; 896 int tid = IEEE80211_NUM_TIDS; 897 898 sband = local->hw.wiphy->bands[info->band]; 899 fc = hdr->frame_control; 900 901 if (status->sta) { 902 sta = container_of(status->sta, struct sta_info, sta); 903 shift = ieee80211_vif_get_shift(&sta->sdata->vif); 904 905 if (info->flags & IEEE80211_TX_STATUS_EOSP) 906 clear_sta_flag(sta, WLAN_STA_SP); 907 908 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 909 noack_success = !!(info->flags & 910 IEEE80211_TX_STAT_NOACK_TRANSMITTED); 911 912 /* mesh Peer Service Period support */ 913 if (ieee80211_vif_is_mesh(&sta->sdata->vif) && 914 ieee80211_is_data_qos(fc)) 915 ieee80211_mpsp_trigger_process( 916 ieee80211_get_qos_ctl(hdr), sta, true, acked); 917 918 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { 919 /* 920 * The STA is in power save mode, so assume 921 * that this TX packet failed because of that. 922 */ 923 ieee80211_handle_filtered_frame(local, sta, skb); 924 return; 925 } 926 927 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && 928 (ieee80211_is_data(hdr->frame_control)) && 929 (rates_idx != -1)) 930 sta->tx_stats.last_rate = 931 info->status.rates[rates_idx]; 932 933 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 934 (ieee80211_is_data_qos(fc))) { 935 u16 ssn; 936 u8 *qc; 937 938 qc = ieee80211_get_qos_ctl(hdr); 939 tid = qc[0] & 0xf; 940 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 941 & IEEE80211_SCTL_SEQ); 942 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, 943 tid, ssn); 944 } else if (ieee80211_is_data_qos(fc)) { 945 u8 *qc = ieee80211_get_qos_ctl(hdr); 946 947 tid = qc[0] & 0xf; 948 } 949 950 if (!acked && ieee80211_is_back_req(fc)) { 951 u16 control; 952 953 /* 954 * BAR failed, store the last SSN and retry sending 955 * the BAR when the next unicast transmission on the 956 * same TID succeeds. 957 */ 958 bar = (struct ieee80211_bar *) skb->data; 959 control = le16_to_cpu(bar->control); 960 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { 961 u16 ssn = le16_to_cpu(bar->start_seq_num); 962 963 tid = (control & 964 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 965 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 966 967 ieee80211_set_bar_pending(sta, tid, ssn); 968 } 969 } 970 971 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 972 ieee80211_handle_filtered_frame(local, sta, skb); 973 return; 974 } else if (ieee80211_is_data_present(fc)) { 975 if (!acked && !noack_success) 976 sta->status_stats.msdu_failed[tid]++; 977 978 sta->status_stats.msdu_retries[tid] += 979 retry_count; 980 } 981 982 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) 983 ieee80211_frame_acked(sta, skb); 984 985 } 986 987 /* SNMP counters 988 * Fragments are passed to low-level drivers as separate skbs, so these 989 * are actually fragments, not frames. Update frame counters only for 990 * the first fragment of the frame. */ 991 if ((info->flags & IEEE80211_TX_STAT_ACK) || 992 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 993 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 994 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 995 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 996 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 997 if (retry_count > 0) 998 I802_DEBUG_INC(local->dot11RetryCount); 999 if (retry_count > 1) 1000 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1001 } 1002 1003 /* This counter shall be incremented for an acknowledged MPDU 1004 * with an individual address in the address 1 field or an MPDU 1005 * with a multicast address in the address 1 field of type Data 1006 * or Management. */ 1007 if (!is_multicast_ether_addr(hdr->addr1) || 1008 ieee80211_is_data(fc) || 1009 ieee80211_is_mgmt(fc)) 1010 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1011 } else { 1012 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1013 I802_DEBUG_INC(local->dot11FailedCount); 1014 } 1015 1016 if (ieee80211_is_any_nullfunc(fc) && 1017 ieee80211_has_pm(fc) && 1018 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1019 !(info->flags & IEEE80211_TX_CTL_INJECTED) && 1020 local->ps_sdata && !(local->scanning)) { 1021 if (info->flags & IEEE80211_TX_STAT_ACK) { 1022 local->ps_sdata->u.mgd.flags |= 1023 IEEE80211_STA_NULLFUNC_ACKED; 1024 } else 1025 mod_timer(&local->dynamic_ps_timer, jiffies + 1026 msecs_to_jiffies(10)); 1027 } 1028 1029 ieee80211_report_used_skb(local, skb, false); 1030 1031 /* this was a transmitted frame, but now we want to reuse it */ 1032 skb_orphan(skb); 1033 1034 /* Need to make a copy before skb->cb gets cleared */ 1035 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || 1036 !(ieee80211_is_data(fc)); 1037 1038 /* 1039 * This is a bit racy but we can avoid a lot of work 1040 * with this test... 1041 */ 1042 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { 1043 if (status->free_list) 1044 list_add_tail(&skb->list, status->free_list); 1045 else 1046 dev_kfree_skb(skb); 1047 return; 1048 } 1049 1050 /* send to monitor interfaces */ 1051 ieee80211_tx_monitor(local, skb, sband, retry_count, shift, 1052 send_to_cooked, status); 1053 } 1054 1055 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1056 { 1057 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1058 struct ieee80211_local *local = hw_to_local(hw); 1059 struct ieee80211_tx_status status = { 1060 .skb = skb, 1061 .info = IEEE80211_SKB_CB(skb), 1062 }; 1063 struct sta_info *sta; 1064 1065 rcu_read_lock(); 1066 1067 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 1068 if (sta) 1069 status.sta = &sta->sta; 1070 1071 ieee80211_tx_status_ext(hw, &status); 1072 rcu_read_unlock(); 1073 } 1074 EXPORT_SYMBOL(ieee80211_tx_status); 1075 1076 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1077 struct ieee80211_tx_status *status) 1078 { 1079 struct ieee80211_local *local = hw_to_local(hw); 1080 struct ieee80211_tx_info *info = status->info; 1081 struct ieee80211_sta *pubsta = status->sta; 1082 struct sk_buff *skb = status->skb; 1083 struct ieee80211_supported_band *sband; 1084 struct sta_info *sta = NULL; 1085 int rates_idx, retry_count; 1086 bool acked, noack_success; 1087 u16 tx_time_est; 1088 1089 if (pubsta) { 1090 sta = container_of(pubsta, struct sta_info, sta); 1091 1092 if (status->rate) 1093 sta->tx_stats.last_rate_info = *status->rate; 1094 } 1095 1096 if (skb && (tx_time_est = 1097 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) { 1098 /* Do this here to avoid the expensive lookup of the sta 1099 * in ieee80211_report_used_skb(). 1100 */ 1101 ieee80211_sta_update_pending_airtime(local, sta, 1102 skb_get_queue_mapping(skb), 1103 tx_time_est, 1104 true); 1105 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0); 1106 } 1107 1108 if (!status->info) 1109 goto free; 1110 1111 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 1112 1113 sband = hw->wiphy->bands[info->band]; 1114 1115 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1116 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1117 1118 if (pubsta) { 1119 struct ieee80211_sub_if_data *sdata = sta->sdata; 1120 1121 if (!acked && !noack_success) 1122 sta->status_stats.retry_failed++; 1123 sta->status_stats.retry_count += retry_count; 1124 1125 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 1126 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1127 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1128 ieee80211_sta_tx_notify(sdata, (void *) skb->data, 1129 acked, info->status.tx_time); 1130 1131 if (acked) { 1132 sta->status_stats.last_ack = jiffies; 1133 1134 if (sta->status_stats.lost_packets) 1135 sta->status_stats.lost_packets = 0; 1136 1137 /* Track when last packet was ACKed */ 1138 sta->status_stats.last_pkt_time = jiffies; 1139 1140 /* Reset connection monitor */ 1141 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1142 unlikely(sdata->u.mgd.probe_send_count > 0)) 1143 sdata->u.mgd.probe_send_count = 0; 1144 1145 if (info->status.is_valid_ack_signal) { 1146 sta->status_stats.last_ack_signal = 1147 (s8)info->status.ack_signal; 1148 sta->status_stats.ack_signal_filled = true; 1149 ewma_avg_signal_add(&sta->status_stats.avg_ack_signal, 1150 -info->status.ack_signal); 1151 } 1152 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1153 return; 1154 } else if (noack_success) { 1155 /* nothing to do here, do not account as lost */ 1156 } else { 1157 ieee80211_lost_packet(sta, info); 1158 } 1159 } 1160 1161 rate_control_tx_status(local, sband, status); 1162 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1163 ieee80211s_update_metric(local, sta, status); 1164 } 1165 1166 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1167 return __ieee80211_tx_status(hw, status, rates_idx, 1168 retry_count); 1169 1170 if (acked || noack_success) { 1171 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1172 if (!pubsta) 1173 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1174 if (retry_count > 0) 1175 I802_DEBUG_INC(local->dot11RetryCount); 1176 if (retry_count > 1) 1177 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1178 } else { 1179 I802_DEBUG_INC(local->dot11FailedCount); 1180 } 1181 1182 free: 1183 if (!skb) 1184 return; 1185 1186 ieee80211_report_used_skb(local, skb, false); 1187 if (status->free_list) 1188 list_add_tail(&skb->list, status->free_list); 1189 else 1190 dev_kfree_skb(skb); 1191 } 1192 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1193 1194 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1195 struct ieee80211_sta *pubsta, 1196 struct ieee80211_tx_info *info) 1197 { 1198 struct ieee80211_local *local = hw_to_local(hw); 1199 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band]; 1200 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1201 struct ieee80211_tx_status status = { 1202 .info = info, 1203 .sta = pubsta, 1204 }; 1205 1206 rate_control_tx_status(local, sband, &status); 1207 1208 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1209 sta->tx_stats.last_rate = info->status.rates[0]; 1210 } 1211 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1212 1213 void ieee80211_tx_status_8023(struct ieee80211_hw *hw, 1214 struct ieee80211_vif *vif, 1215 struct sk_buff *skb) 1216 { 1217 struct ieee80211_sub_if_data *sdata; 1218 struct ieee80211_tx_status status = { 1219 .skb = skb, 1220 .info = IEEE80211_SKB_CB(skb), 1221 }; 1222 struct sta_info *sta; 1223 1224 sdata = vif_to_sdata(vif); 1225 1226 rcu_read_lock(); 1227 1228 if (!ieee80211_lookup_ra_sta(sdata, skb, &sta) && !IS_ERR(sta)) 1229 status.sta = &sta->sta; 1230 1231 ieee80211_tx_status_ext(hw, &status); 1232 1233 rcu_read_unlock(); 1234 } 1235 EXPORT_SYMBOL(ieee80211_tx_status_8023); 1236 1237 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1238 { 1239 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1240 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1241 num_packets, GFP_ATOMIC); 1242 } 1243 EXPORT_SYMBOL(ieee80211_report_low_ack); 1244 1245 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1246 { 1247 struct ieee80211_local *local = hw_to_local(hw); 1248 1249 ieee80211_report_used_skb(local, skb, true); 1250 dev_kfree_skb_any(skb); 1251 } 1252 EXPORT_SYMBOL(ieee80211_free_txskb); 1253 1254 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1255 struct sk_buff_head *skbs) 1256 { 1257 struct sk_buff *skb; 1258 1259 while ((skb = __skb_dequeue(skbs))) 1260 ieee80211_free_txskb(hw, skb); 1261 } 1262