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 * Copyright 2021-2022 Intel Corporation 9 */ 10 11 #include <linux/export.h> 12 #include <linux/etherdevice.h> 13 #include <net/mac80211.h> 14 #include <asm/unaligned.h> 15 #include "ieee80211_i.h" 16 #include "rate.h" 17 #include "mesh.h" 18 #include "led.h" 19 #include "wme.h" 20 21 22 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 23 struct sk_buff *skb) 24 { 25 struct ieee80211_local *local = hw_to_local(hw); 26 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 27 int tmp; 28 29 skb->pkt_type = IEEE80211_TX_STATUS_MSG; 30 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? 31 &local->skb_queue : &local->skb_queue_unreliable, skb); 32 tmp = skb_queue_len(&local->skb_queue) + 33 skb_queue_len(&local->skb_queue_unreliable); 34 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && 35 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 36 ieee80211_free_txskb(hw, skb); 37 tmp--; 38 I802_DEBUG_INC(local->tx_status_drop); 39 } 40 tasklet_schedule(&local->tasklet); 41 } 42 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); 43 44 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, 45 struct sta_info *sta, 46 struct sk_buff *skb) 47 { 48 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 49 struct ieee80211_hdr *hdr = (void *)skb->data; 50 int ac; 51 52 if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER | 53 IEEE80211_TX_CTL_AMPDU | 54 IEEE80211_TX_CTL_HW_80211_ENCAP)) { 55 ieee80211_free_txskb(&local->hw, skb); 56 return; 57 } 58 59 /* 60 * This skb 'survived' a round-trip through the driver, and 61 * hopefully the driver didn't mangle it too badly. However, 62 * we can definitely not rely on the control information 63 * being correct. Clear it so we don't get junk there, and 64 * indicate that it needs new processing, but must not be 65 * modified/encrypted again. 66 */ 67 memset(&info->control, 0, sizeof(info->control)); 68 69 info->control.jiffies = jiffies; 70 info->control.vif = &sta->sdata->vif; 71 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING; 72 info->flags |= IEEE80211_TX_INTFL_RETRANSMISSION; 73 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; 74 75 sta->deflink.status_stats.filtered++; 76 77 /* 78 * Clear more-data bit on filtered frames, it might be set 79 * but later frames might time out so it might have to be 80 * clear again ... It's all rather unlikely (this frame 81 * should time out first, right?) but let's not confuse 82 * peers unnecessarily. 83 */ 84 if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) 85 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); 86 87 if (ieee80211_is_data_qos(hdr->frame_control)) { 88 u8 *p = ieee80211_get_qos_ctl(hdr); 89 int tid = *p & IEEE80211_QOS_CTL_TID_MASK; 90 91 /* 92 * Clear EOSP if set, this could happen e.g. 93 * if an absence period (us being a P2P GO) 94 * shortens the SP. 95 */ 96 if (*p & IEEE80211_QOS_CTL_EOSP) 97 *p &= ~IEEE80211_QOS_CTL_EOSP; 98 ac = ieee80211_ac_from_tid(tid); 99 } else { 100 ac = IEEE80211_AC_BE; 101 } 102 103 /* 104 * Clear the TX filter mask for this STA when sending the next 105 * packet. If the STA went to power save mode, this will happen 106 * when it wakes up for the next time. 107 */ 108 set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT); 109 ieee80211_clear_fast_xmit(sta); 110 111 /* 112 * This code races in the following way: 113 * 114 * (1) STA sends frame indicating it will go to sleep and does so 115 * (2) hardware/firmware adds STA to filter list, passes frame up 116 * (3) hardware/firmware processes TX fifo and suppresses a frame 117 * (4) we get TX status before having processed the frame and 118 * knowing that the STA has gone to sleep. 119 * 120 * This is actually quite unlikely even when both those events are 121 * processed from interrupts coming in quickly after one another or 122 * even at the same time because we queue both TX status events and 123 * RX frames to be processed by a tasklet and process them in the 124 * same order that they were received or TX status last. Hence, there 125 * is no race as long as the frame RX is processed before the next TX 126 * status, which drivers can ensure, see below. 127 * 128 * Note that this can only happen if the hardware or firmware can 129 * actually add STAs to the filter list, if this is done by the 130 * driver in response to set_tim() (which will only reduce the race 131 * this whole filtering tries to solve, not completely solve it) 132 * this situation cannot happen. 133 * 134 * To completely solve this race drivers need to make sure that they 135 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing 136 * functions and 137 * (b) always process RX events before TX status events if ordering 138 * can be unknown, for example with different interrupt status 139 * bits. 140 * (c) if PS mode transitions are manual (i.e. the flag 141 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state 142 * changes before calling TX status events if ordering can be 143 * unknown. 144 */ 145 if (test_sta_flag(sta, WLAN_STA_PS_STA) && 146 skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { 147 skb_queue_tail(&sta->tx_filtered[ac], skb); 148 sta_info_recalc_tim(sta); 149 150 if (!timer_pending(&local->sta_cleanup)) 151 mod_timer(&local->sta_cleanup, 152 round_jiffies(jiffies + 153 STA_INFO_CLEANUP_INTERVAL)); 154 return; 155 } 156 157 if (!test_sta_flag(sta, WLAN_STA_PS_STA) && 158 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { 159 /* Software retry the packet once */ 160 info->flags |= IEEE80211_TX_INTFL_RETRIED; 161 ieee80211_add_pending_skb(local, skb); 162 return; 163 } 164 165 ps_dbg_ratelimited(sta->sdata, 166 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", 167 skb_queue_len(&sta->tx_filtered[ac]), 168 !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); 169 ieee80211_free_txskb(&local->hw, skb); 170 } 171 172 static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) 173 { 174 struct tid_ampdu_tx *tid_tx; 175 176 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 177 if (!tid_tx || !tid_tx->bar_pending) 178 return; 179 180 tid_tx->bar_pending = false; 181 ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn); 182 } 183 184 static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) 185 { 186 struct ieee80211_mgmt *mgmt = (void *) skb->data; 187 struct ieee80211_local *local = sta->local; 188 struct ieee80211_sub_if_data *sdata = sta->sdata; 189 190 if (ieee80211_is_data_qos(mgmt->frame_control)) { 191 struct ieee80211_hdr *hdr = (void *) skb->data; 192 u8 *qc = ieee80211_get_qos_ctl(hdr); 193 u16 tid = qc[0] & 0xf; 194 195 ieee80211_check_pending_bar(sta, hdr->addr1, tid); 196 } 197 198 if (ieee80211_is_action(mgmt->frame_control) && 199 !ieee80211_has_protected(mgmt->frame_control) && 200 mgmt->u.action.category == WLAN_CATEGORY_HT && 201 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && 202 ieee80211_sdata_running(sdata)) { 203 enum ieee80211_smps_mode smps_mode; 204 205 switch (mgmt->u.action.u.ht_smps.smps_control) { 206 case WLAN_HT_SMPS_CONTROL_DYNAMIC: 207 smps_mode = IEEE80211_SMPS_DYNAMIC; 208 break; 209 case WLAN_HT_SMPS_CONTROL_STATIC: 210 smps_mode = IEEE80211_SMPS_STATIC; 211 break; 212 case WLAN_HT_SMPS_CONTROL_DISABLED: 213 default: /* shouldn't happen since we don't send that */ 214 smps_mode = IEEE80211_SMPS_OFF; 215 break; 216 } 217 218 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 219 /* 220 * This update looks racy, but isn't -- if we come 221 * here we've definitely got a station that we're 222 * talking to, and on a managed interface that can 223 * only be the AP. And the only other place updating 224 * this variable in managed mode is before association. 225 */ 226 sdata->deflink.smps_mode = smps_mode; 227 ieee80211_queue_work(&local->hw, &sdata->recalc_smps); 228 } else if (sdata->vif.type == NL80211_IFTYPE_AP || 229 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 230 sta->known_smps_mode = smps_mode; 231 } 232 } 233 } 234 235 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) 236 { 237 struct tid_ampdu_tx *tid_tx; 238 239 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 240 if (!tid_tx) 241 return; 242 243 tid_tx->failed_bar_ssn = ssn; 244 tid_tx->bar_pending = true; 245 } 246 247 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info, 248 struct ieee80211_tx_status *status) 249 { 250 struct ieee80211_rate_status *status_rate = NULL; 251 int len = sizeof(struct ieee80211_radiotap_header); 252 253 if (status && status->n_rates) 254 status_rate = &status->rates[status->n_rates - 1]; 255 256 /* IEEE80211_RADIOTAP_RATE rate */ 257 if (status_rate && !(status_rate->rate_idx.flags & 258 (RATE_INFO_FLAGS_MCS | 259 RATE_INFO_FLAGS_DMG | 260 RATE_INFO_FLAGS_EDMG | 261 RATE_INFO_FLAGS_VHT_MCS | 262 RATE_INFO_FLAGS_HE_MCS))) 263 len += 2; 264 else if (info->status.rates[0].idx >= 0 && 265 !(info->status.rates[0].flags & 266 (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))) 267 len += 2; 268 269 /* IEEE80211_RADIOTAP_TX_FLAGS */ 270 len += 2; 271 272 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 273 len += 1; 274 275 /* IEEE80211_RADIOTAP_MCS 276 * IEEE80211_RADIOTAP_VHT */ 277 if (status_rate) { 278 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS) 279 len += 3; 280 else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_VHT_MCS) 281 len = ALIGN(len, 2) + 12; 282 else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_HE_MCS) 283 len = ALIGN(len, 2) + 12; 284 } else if (info->status.rates[0].idx >= 0) { 285 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) 286 len += 3; 287 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) 288 len = ALIGN(len, 2) + 12; 289 } 290 291 return len; 292 } 293 294 static void 295 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, 296 struct sk_buff *skb, int retry_count, 297 int rtap_len, int shift, 298 struct ieee80211_tx_status *status) 299 { 300 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 301 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 302 struct ieee80211_radiotap_header *rthdr; 303 struct ieee80211_rate_status *status_rate = NULL; 304 unsigned char *pos; 305 u16 legacy_rate = 0; 306 u16 txflags; 307 308 if (status && status->n_rates) 309 status_rate = &status->rates[status->n_rates - 1]; 310 311 rthdr = skb_push(skb, rtap_len); 312 313 memset(rthdr, 0, rtap_len); 314 rthdr->it_len = cpu_to_le16(rtap_len); 315 rthdr->it_present = 316 cpu_to_le32(BIT(IEEE80211_RADIOTAP_TX_FLAGS) | 317 BIT(IEEE80211_RADIOTAP_DATA_RETRIES)); 318 pos = (unsigned char *)(rthdr + 1); 319 320 /* 321 * XXX: Once radiotap gets the bitmap reset thing the vendor 322 * extensions proposal contains, we can actually report 323 * the whole set of tries we did. 324 */ 325 326 /* IEEE80211_RADIOTAP_RATE */ 327 328 if (status_rate) { 329 if (!(status_rate->rate_idx.flags & 330 (RATE_INFO_FLAGS_MCS | 331 RATE_INFO_FLAGS_DMG | 332 RATE_INFO_FLAGS_EDMG | 333 RATE_INFO_FLAGS_VHT_MCS | 334 RATE_INFO_FLAGS_HE_MCS))) 335 legacy_rate = status_rate->rate_idx.legacy; 336 } else if (info->status.rates[0].idx >= 0 && 337 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | 338 IEEE80211_TX_RC_VHT_MCS))) { 339 struct ieee80211_supported_band *sband; 340 341 sband = local->hw.wiphy->bands[info->band]; 342 legacy_rate = 343 sband->bitrates[info->status.rates[0].idx].bitrate; 344 } 345 346 if (legacy_rate) { 347 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE)); 348 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift)); 349 /* padding for tx flags */ 350 pos += 2; 351 } 352 353 /* IEEE80211_RADIOTAP_TX_FLAGS */ 354 txflags = 0; 355 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 356 !is_multicast_ether_addr(hdr->addr1)) 357 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; 358 359 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 360 txflags |= IEEE80211_RADIOTAP_F_TX_CTS; 361 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) 362 txflags |= IEEE80211_RADIOTAP_F_TX_RTS; 363 364 put_unaligned_le16(txflags, pos); 365 pos += 2; 366 367 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 368 /* for now report the total retry_count */ 369 *pos = retry_count; 370 pos++; 371 372 if (status_rate && (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS)) 373 { 374 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); 375 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 376 IEEE80211_RADIOTAP_MCS_HAVE_GI | 377 IEEE80211_RADIOTAP_MCS_HAVE_BW; 378 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI) 379 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 380 if (status_rate->rate_idx.bw == RATE_INFO_BW_40) 381 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 382 pos[2] = status_rate->rate_idx.mcs; 383 pos += 3; 384 } else if (status_rate && (status_rate->rate_idx.flags & 385 RATE_INFO_FLAGS_VHT_MCS)) 386 { 387 u16 known = local->hw.radiotap_vht_details & 388 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 389 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 390 391 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); 392 393 /* required alignment from rthdr */ 394 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 395 396 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 397 put_unaligned_le16(known, pos); 398 pos += 2; 399 400 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 401 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI) 402 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 403 pos++; 404 405 /* u8 bandwidth */ 406 switch (status_rate->rate_idx.bw) { 407 case RATE_INFO_BW_160: 408 *pos = 11; 409 break; 410 case RATE_INFO_BW_80: 411 *pos = 4; 412 break; 413 case RATE_INFO_BW_40: 414 *pos = 1; 415 break; 416 default: 417 *pos = 0; 418 break; 419 } 420 pos++; 421 422 /* u8 mcs_nss[4] */ 423 *pos = (status_rate->rate_idx.mcs << 4) | 424 status_rate->rate_idx.nss; 425 pos += 4; 426 427 /* u8 coding */ 428 pos++; 429 /* u8 group_id */ 430 pos++; 431 /* u16 partial_aid */ 432 pos += 2; 433 } else if (status_rate && (status_rate->rate_idx.flags & 434 RATE_INFO_FLAGS_HE_MCS)) 435 { 436 struct ieee80211_radiotap_he *he; 437 438 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE)); 439 440 /* required alignment from rthdr */ 441 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 442 he = (struct ieee80211_radiotap_he *)pos; 443 444 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU | 445 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 446 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 447 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 448 449 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN); 450 451 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f) 452 453 he->data6 |= HE_PREP(DATA6_NSTS, status_rate->rate_idx.nss); 454 455 #define CHECK_GI(s) \ 456 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \ 457 (int)NL80211_RATE_INFO_HE_GI_##s) 458 459 CHECK_GI(0_8); 460 CHECK_GI(1_6); 461 CHECK_GI(3_2); 462 463 he->data3 |= HE_PREP(DATA3_DATA_MCS, status_rate->rate_idx.mcs); 464 he->data3 |= HE_PREP(DATA3_DATA_DCM, status_rate->rate_idx.he_dcm); 465 466 he->data5 |= HE_PREP(DATA5_GI, status_rate->rate_idx.he_gi); 467 468 switch (status_rate->rate_idx.bw) { 469 case RATE_INFO_BW_20: 470 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 471 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ); 472 break; 473 case RATE_INFO_BW_40: 474 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 475 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ); 476 break; 477 case RATE_INFO_BW_80: 478 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 479 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ); 480 break; 481 case RATE_INFO_BW_160: 482 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 483 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ); 484 break; 485 case RATE_INFO_BW_HE_RU: 486 #define CHECK_RU_ALLOC(s) \ 487 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \ 488 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4) 489 490 CHECK_RU_ALLOC(26); 491 CHECK_RU_ALLOC(52); 492 CHECK_RU_ALLOC(106); 493 CHECK_RU_ALLOC(242); 494 CHECK_RU_ALLOC(484); 495 CHECK_RU_ALLOC(996); 496 CHECK_RU_ALLOC(2x996); 497 498 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 499 status_rate->rate_idx.he_ru_alloc + 4); 500 break; 501 default: 502 WARN_ONCE(1, "Invalid SU BW %d\n", status_rate->rate_idx.bw); 503 } 504 505 pos += sizeof(struct ieee80211_radiotap_he); 506 } 507 508 if (status_rate || info->status.rates[0].idx < 0) 509 return; 510 511 /* IEEE80211_RADIOTAP_MCS 512 * IEEE80211_RADIOTAP_VHT */ 513 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { 514 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); 515 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 516 IEEE80211_RADIOTAP_MCS_HAVE_GI | 517 IEEE80211_RADIOTAP_MCS_HAVE_BW; 518 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 519 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 520 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 521 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 522 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) 523 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; 524 pos[2] = info->status.rates[0].idx; 525 pos += 3; 526 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { 527 u16 known = local->hw.radiotap_vht_details & 528 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 529 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 530 531 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); 532 533 /* required alignment from rthdr */ 534 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 535 536 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 537 put_unaligned_le16(known, pos); 538 pos += 2; 539 540 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 541 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 542 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 543 pos++; 544 545 /* u8 bandwidth */ 546 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 547 *pos = 1; 548 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 549 *pos = 4; 550 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 551 *pos = 11; 552 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ 553 *pos = 0; 554 pos++; 555 556 /* u8 mcs_nss[4] */ 557 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | 558 ieee80211_rate_get_vht_nss(&info->status.rates[0]); 559 pos += 4; 560 561 /* u8 coding */ 562 pos++; 563 /* u8 group_id */ 564 pos++; 565 /* u16 partial_aid */ 566 pos += 2; 567 } 568 } 569 570 /* 571 * Handles the tx for TDLS teardown frames. 572 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP 573 */ 574 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, 575 struct ieee80211_sub_if_data *sdata, 576 struct sk_buff *skb, u32 flags) 577 { 578 struct sk_buff *teardown_skb; 579 struct sk_buff *orig_teardown_skb; 580 bool is_teardown = false; 581 582 /* Get the teardown data we need and free the lock */ 583 spin_lock(&sdata->u.mgd.teardown_lock); 584 teardown_skb = sdata->u.mgd.teardown_skb; 585 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; 586 if ((skb == orig_teardown_skb) && teardown_skb) { 587 sdata->u.mgd.teardown_skb = NULL; 588 sdata->u.mgd.orig_teardown_skb = NULL; 589 is_teardown = true; 590 } 591 spin_unlock(&sdata->u.mgd.teardown_lock); 592 593 if (is_teardown) { 594 /* This mechanism relies on being able to get ACKs */ 595 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); 596 597 /* Check if peer has ACKed */ 598 if (flags & IEEE80211_TX_STAT_ACK) { 599 dev_kfree_skb_any(teardown_skb); 600 } else { 601 tdls_dbg(sdata, 602 "TDLS Resending teardown through AP\n"); 603 604 ieee80211_subif_start_xmit(teardown_skb, skb->dev); 605 } 606 } 607 } 608 609 static struct ieee80211_sub_if_data * 610 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) 611 { 612 struct ieee80211_sub_if_data *sdata; 613 614 if (skb->dev) { 615 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 616 if (!sdata->dev) 617 continue; 618 619 if (skb->dev == sdata->dev) 620 return sdata; 621 } 622 623 return NULL; 624 } 625 626 return rcu_dereference(local->p2p_sdata); 627 } 628 629 static void ieee80211_report_ack_skb(struct ieee80211_local *local, 630 struct ieee80211_tx_info *info, 631 bool acked, bool dropped) 632 { 633 struct sk_buff *skb; 634 unsigned long flags; 635 636 spin_lock_irqsave(&local->ack_status_lock, flags); 637 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id); 638 spin_unlock_irqrestore(&local->ack_status_lock, flags); 639 640 if (!skb) 641 return; 642 643 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { 644 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; 645 struct ieee80211_sub_if_data *sdata; 646 struct ieee80211_hdr *hdr = (void *)skb->data; 647 bool is_valid_ack_signal = 648 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 649 650 rcu_read_lock(); 651 sdata = ieee80211_sdata_from_skb(local, skb); 652 if (sdata) { 653 if (skb->protocol == sdata->control_port_protocol || 654 skb->protocol == cpu_to_be16(ETH_P_PREAUTH)) 655 cfg80211_control_port_tx_status(&sdata->wdev, 656 cookie, 657 skb->data, 658 skb->len, 659 acked, 660 GFP_ATOMIC); 661 else if (ieee80211_is_any_nullfunc(hdr->frame_control)) 662 cfg80211_probe_status(sdata->dev, hdr->addr1, 663 cookie, acked, 664 info->status.ack_signal, 665 is_valid_ack_signal, 666 GFP_ATOMIC); 667 else if (ieee80211_is_mgmt(hdr->frame_control)) 668 cfg80211_mgmt_tx_status(&sdata->wdev, cookie, 669 skb->data, skb->len, 670 acked, GFP_ATOMIC); 671 else 672 pr_warn("Unknown status report in ack skb\n"); 673 674 } 675 rcu_read_unlock(); 676 677 dev_kfree_skb_any(skb); 678 } else if (dropped) { 679 dev_kfree_skb_any(skb); 680 } else { 681 /* consumes skb */ 682 skb_complete_wifi_ack(skb, acked); 683 } 684 } 685 686 static void ieee80211_report_used_skb(struct ieee80211_local *local, 687 struct sk_buff *skb, bool dropped) 688 { 689 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 690 u16 tx_time_est = ieee80211_info_get_tx_time_est(info); 691 struct ieee80211_hdr *hdr = (void *)skb->data; 692 bool acked = info->flags & IEEE80211_TX_STAT_ACK; 693 694 if (dropped) 695 acked = false; 696 697 if (tx_time_est) { 698 struct sta_info *sta; 699 700 rcu_read_lock(); 701 702 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 703 ieee80211_sta_update_pending_airtime(local, sta, 704 skb_get_queue_mapping(skb), 705 tx_time_est, 706 true); 707 rcu_read_unlock(); 708 } 709 710 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { 711 struct ieee80211_sub_if_data *sdata; 712 713 rcu_read_lock(); 714 715 sdata = ieee80211_sdata_from_skb(local, skb); 716 717 if (!sdata) { 718 skb->dev = NULL; 719 } else { 720 unsigned int hdr_size = 721 ieee80211_hdrlen(hdr->frame_control); 722 723 /* Check to see if packet is a TDLS teardown packet */ 724 if (ieee80211_is_data(hdr->frame_control) && 725 (ieee80211_get_tdls_action(skb, hdr_size) == 726 WLAN_TDLS_TEARDOWN)) { 727 ieee80211_tdls_td_tx_handle(local, sdata, skb, 728 info->flags); 729 } else if (ieee80211_s1g_is_twt_setup(skb)) { 730 if (!acked) { 731 struct sk_buff *qskb; 732 733 qskb = skb_clone(skb, GFP_ATOMIC); 734 if (qskb) { 735 skb_queue_tail(&sdata->status_queue, 736 qskb); 737 ieee80211_queue_work(&local->hw, 738 &sdata->work); 739 } 740 } 741 } else { 742 ieee80211_mgd_conn_tx_status(sdata, 743 hdr->frame_control, 744 acked); 745 } 746 } 747 748 rcu_read_unlock(); 749 } else if (info->ack_frame_id) { 750 ieee80211_report_ack_skb(local, info, acked, dropped); 751 } 752 753 if (!dropped && skb->destructor) { 754 skb->wifi_acked_valid = 1; 755 skb->wifi_acked = acked; 756 } 757 758 ieee80211_led_tx(local); 759 760 if (skb_has_frag_list(skb)) { 761 kfree_skb_list(skb_shinfo(skb)->frag_list); 762 skb_shinfo(skb)->frag_list = NULL; 763 } 764 } 765 766 /* 767 * Use a static threshold for now, best value to be determined 768 * by testing ... 769 * Should it depend on: 770 * - on # of retransmissions 771 * - current throughput (higher value for higher tpt)? 772 */ 773 #define STA_LOST_PKT_THRESHOLD 50 774 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */ 775 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ 776 777 static void ieee80211_lost_packet(struct sta_info *sta, 778 struct ieee80211_tx_info *info) 779 { 780 unsigned long pkt_time = STA_LOST_PKT_TIME; 781 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD; 782 783 /* If driver relies on its own algorithm for station kickout, skip 784 * mac80211 packet loss mechanism. 785 */ 786 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) 787 return; 788 789 /* This packet was aggregated but doesn't carry status info */ 790 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 791 !(info->flags & IEEE80211_TX_STAT_AMPDU)) 792 return; 793 794 sta->deflink.status_stats.lost_packets++; 795 if (sta->sta.tdls) { 796 pkt_time = STA_LOST_TDLS_PKT_TIME; 797 pkt_thr = STA_LOST_PKT_THRESHOLD; 798 } 799 800 /* 801 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD 802 * of the last packets were lost, and that no ACK was received in the 803 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss 804 * mechanism. 805 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME 806 */ 807 if (sta->deflink.status_stats.lost_packets < pkt_thr || 808 !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time)) 809 return; 810 811 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 812 sta->deflink.status_stats.lost_packets, 813 GFP_ATOMIC); 814 sta->deflink.status_stats.lost_packets = 0; 815 } 816 817 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 818 struct ieee80211_tx_info *info, 819 int *retry_count) 820 { 821 int count = -1; 822 int i; 823 824 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 825 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 826 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 827 /* just the first aggr frame carry status info */ 828 info->status.rates[i].idx = -1; 829 info->status.rates[i].count = 0; 830 break; 831 } else if (info->status.rates[i].idx < 0) { 832 break; 833 } else if (i >= hw->max_report_rates) { 834 /* the HW cannot have attempted that rate */ 835 info->status.rates[i].idx = -1; 836 info->status.rates[i].count = 0; 837 break; 838 } 839 840 count += info->status.rates[i].count; 841 } 842 843 if (count < 0) 844 count = 0; 845 846 *retry_count = count; 847 return i - 1; 848 } 849 850 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 851 int retry_count, int shift, bool send_to_cooked, 852 struct ieee80211_tx_status *status) 853 { 854 struct sk_buff *skb2; 855 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 856 struct ieee80211_sub_if_data *sdata; 857 struct net_device *prev_dev = NULL; 858 int rtap_len; 859 860 /* send frame to monitor interfaces now */ 861 rtap_len = ieee80211_tx_radiotap_len(info, status); 862 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 863 pr_err("ieee80211_tx_status: headroom too small\n"); 864 dev_kfree_skb(skb); 865 return; 866 } 867 ieee80211_add_tx_radiotap_header(local, skb, retry_count, 868 rtap_len, shift, status); 869 870 /* XXX: is this sufficient for BPF? */ 871 skb_reset_mac_header(skb); 872 skb->ip_summed = CHECKSUM_UNNECESSARY; 873 skb->pkt_type = PACKET_OTHERHOST; 874 skb->protocol = htons(ETH_P_802_2); 875 memset(skb->cb, 0, sizeof(skb->cb)); 876 877 rcu_read_lock(); 878 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 879 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 880 if (!ieee80211_sdata_running(sdata)) 881 continue; 882 883 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && 884 !send_to_cooked) 885 continue; 886 887 if (prev_dev) { 888 skb2 = skb_clone(skb, GFP_ATOMIC); 889 if (skb2) { 890 skb2->dev = prev_dev; 891 netif_rx(skb2); 892 } 893 } 894 895 prev_dev = sdata->dev; 896 } 897 } 898 if (prev_dev) { 899 skb->dev = prev_dev; 900 netif_rx(skb); 901 skb = NULL; 902 } 903 rcu_read_unlock(); 904 dev_kfree_skb(skb); 905 } 906 907 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 908 struct ieee80211_tx_status *status, 909 int rates_idx, int retry_count) 910 { 911 struct sk_buff *skb = status->skb; 912 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 913 struct ieee80211_local *local = hw_to_local(hw); 914 struct ieee80211_tx_info *info = status->info; 915 struct sta_info *sta; 916 __le16 fc; 917 bool send_to_cooked; 918 bool acked; 919 bool noack_success; 920 struct ieee80211_bar *bar; 921 int shift = 0; 922 int tid = IEEE80211_NUM_TIDS; 923 924 fc = hdr->frame_control; 925 926 if (status->sta) { 927 sta = container_of(status->sta, struct sta_info, sta); 928 shift = ieee80211_vif_get_shift(&sta->sdata->vif); 929 930 if (info->flags & IEEE80211_TX_STATUS_EOSP) 931 clear_sta_flag(sta, WLAN_STA_SP); 932 933 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 934 noack_success = !!(info->flags & 935 IEEE80211_TX_STAT_NOACK_TRANSMITTED); 936 937 /* mesh Peer Service Period support */ 938 if (ieee80211_vif_is_mesh(&sta->sdata->vif) && 939 ieee80211_is_data_qos(fc)) 940 ieee80211_mpsp_trigger_process( 941 ieee80211_get_qos_ctl(hdr), sta, true, acked); 942 943 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) && 944 (ieee80211_is_data(hdr->frame_control)) && 945 (rates_idx != -1)) 946 sta->deflink.tx_stats.last_rate = 947 info->status.rates[rates_idx]; 948 949 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && 950 (ieee80211_is_data_qos(fc))) { 951 u16 ssn; 952 u8 *qc; 953 954 qc = ieee80211_get_qos_ctl(hdr); 955 tid = qc[0] & 0xf; 956 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) 957 & IEEE80211_SCTL_SEQ); 958 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, 959 tid, ssn); 960 } else if (ieee80211_is_data_qos(fc)) { 961 u8 *qc = ieee80211_get_qos_ctl(hdr); 962 963 tid = qc[0] & 0xf; 964 } 965 966 if (!acked && ieee80211_is_back_req(fc)) { 967 u16 control; 968 969 /* 970 * BAR failed, store the last SSN and retry sending 971 * the BAR when the next unicast transmission on the 972 * same TID succeeds. 973 */ 974 bar = (struct ieee80211_bar *) skb->data; 975 control = le16_to_cpu(bar->control); 976 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { 977 u16 ssn = le16_to_cpu(bar->start_seq_num); 978 979 tid = (control & 980 IEEE80211_BAR_CTRL_TID_INFO_MASK) >> 981 IEEE80211_BAR_CTRL_TID_INFO_SHIFT; 982 983 ieee80211_set_bar_pending(sta, tid, ssn); 984 } 985 } 986 987 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { 988 ieee80211_handle_filtered_frame(local, sta, skb); 989 return; 990 } else if (ieee80211_is_data_present(fc)) { 991 if (!acked && !noack_success) 992 sta->deflink.status_stats.msdu_failed[tid]++; 993 994 sta->deflink.status_stats.msdu_retries[tid] += 995 retry_count; 996 } 997 998 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) 999 ieee80211_frame_acked(sta, skb); 1000 1001 } 1002 1003 /* SNMP counters 1004 * Fragments are passed to low-level drivers as separate skbs, so these 1005 * are actually fragments, not frames. Update frame counters only for 1006 * the first fragment of the frame. */ 1007 if ((info->flags & IEEE80211_TX_STAT_ACK) || 1008 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 1009 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 1010 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1011 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 1012 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1013 if (retry_count > 0) 1014 I802_DEBUG_INC(local->dot11RetryCount); 1015 if (retry_count > 1) 1016 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1017 } 1018 1019 /* This counter shall be incremented for an acknowledged MPDU 1020 * with an individual address in the address 1 field or an MPDU 1021 * with a multicast address in the address 1 field of type Data 1022 * or Management. */ 1023 if (!is_multicast_ether_addr(hdr->addr1) || 1024 ieee80211_is_data(fc) || 1025 ieee80211_is_mgmt(fc)) 1026 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1027 } else { 1028 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1029 I802_DEBUG_INC(local->dot11FailedCount); 1030 } 1031 1032 if (ieee80211_is_any_nullfunc(fc) && 1033 ieee80211_has_pm(fc) && 1034 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1035 !(info->flags & IEEE80211_TX_CTL_INJECTED) && 1036 local->ps_sdata && !(local->scanning)) { 1037 if (info->flags & IEEE80211_TX_STAT_ACK) 1038 local->ps_sdata->u.mgd.flags |= 1039 IEEE80211_STA_NULLFUNC_ACKED; 1040 mod_timer(&local->dynamic_ps_timer, 1041 jiffies + msecs_to_jiffies(10)); 1042 } 1043 1044 ieee80211_report_used_skb(local, skb, false); 1045 1046 /* this was a transmitted frame, but now we want to reuse it */ 1047 skb_orphan(skb); 1048 1049 /* Need to make a copy before skb->cb gets cleared */ 1050 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || 1051 !(ieee80211_is_data(fc)); 1052 1053 /* 1054 * This is a bit racy but we can avoid a lot of work 1055 * with this test... 1056 */ 1057 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { 1058 if (status->free_list) 1059 list_add_tail(&skb->list, status->free_list); 1060 else 1061 dev_kfree_skb(skb); 1062 return; 1063 } 1064 1065 /* send to monitor interfaces */ 1066 ieee80211_tx_monitor(local, skb, retry_count, shift, 1067 send_to_cooked, status); 1068 } 1069 1070 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1071 { 1072 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1073 struct ieee80211_local *local = hw_to_local(hw); 1074 struct ieee80211_tx_status status = { 1075 .skb = skb, 1076 .info = IEEE80211_SKB_CB(skb), 1077 }; 1078 struct sta_info *sta; 1079 1080 rcu_read_lock(); 1081 1082 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 1083 if (sta) 1084 status.sta = &sta->sta; 1085 1086 ieee80211_tx_status_ext(hw, &status); 1087 rcu_read_unlock(); 1088 } 1089 EXPORT_SYMBOL(ieee80211_tx_status); 1090 1091 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1092 struct ieee80211_tx_status *status) 1093 { 1094 struct ieee80211_local *local = hw_to_local(hw); 1095 struct ieee80211_tx_info *info = status->info; 1096 struct ieee80211_sta *pubsta = status->sta; 1097 struct sk_buff *skb = status->skb; 1098 struct sta_info *sta = NULL; 1099 int rates_idx, retry_count; 1100 bool acked, noack_success, ack_signal_valid; 1101 u16 tx_time_est; 1102 1103 if (pubsta) { 1104 sta = container_of(pubsta, struct sta_info, sta); 1105 1106 if (status->n_rates) 1107 sta->deflink.tx_stats.last_rate_info = 1108 status->rates[status->n_rates - 1].rate_idx; 1109 } 1110 1111 if (skb && (tx_time_est = 1112 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) { 1113 /* Do this here to avoid the expensive lookup of the sta 1114 * in ieee80211_report_used_skb(). 1115 */ 1116 ieee80211_sta_update_pending_airtime(local, sta, 1117 skb_get_queue_mapping(skb), 1118 tx_time_est, 1119 true); 1120 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0); 1121 } 1122 1123 if (!status->info) 1124 goto free; 1125 1126 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 1127 1128 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1129 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1130 ack_signal_valid = 1131 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 1132 1133 if (pubsta) { 1134 struct ieee80211_sub_if_data *sdata = sta->sdata; 1135 1136 if (!acked && !noack_success) 1137 sta->deflink.status_stats.retry_failed++; 1138 sta->deflink.status_stats.retry_count += retry_count; 1139 1140 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 1141 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1142 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1143 ieee80211_sta_tx_notify(sdata, (void *) skb->data, 1144 acked, info->status.tx_time); 1145 1146 if (acked) { 1147 sta->deflink.status_stats.last_ack = jiffies; 1148 1149 if (sta->deflink.status_stats.lost_packets) 1150 sta->deflink.status_stats.lost_packets = 0; 1151 1152 /* Track when last packet was ACKed */ 1153 sta->deflink.status_stats.last_pkt_time = jiffies; 1154 1155 /* Reset connection monitor */ 1156 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1157 unlikely(sdata->u.mgd.probe_send_count > 0)) 1158 sdata->u.mgd.probe_send_count = 0; 1159 1160 if (ack_signal_valid) { 1161 sta->deflink.status_stats.last_ack_signal = 1162 (s8)info->status.ack_signal; 1163 sta->deflink.status_stats.ack_signal_filled = true; 1164 ewma_avg_signal_add(&sta->deflink.status_stats.avg_ack_signal, 1165 -info->status.ack_signal); 1166 } 1167 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1168 /* 1169 * The STA is in power save mode, so assume 1170 * that this TX packet failed because of that. 1171 */ 1172 if (skb) 1173 ieee80211_handle_filtered_frame(local, sta, skb); 1174 return; 1175 } else if (noack_success) { 1176 /* nothing to do here, do not account as lost */ 1177 } else { 1178 ieee80211_lost_packet(sta, info); 1179 } 1180 } 1181 1182 rate_control_tx_status(local, status); 1183 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1184 ieee80211s_update_metric(local, sta, status); 1185 } 1186 1187 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1188 return __ieee80211_tx_status(hw, status, rates_idx, 1189 retry_count); 1190 1191 if (acked || noack_success) { 1192 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1193 if (!pubsta) 1194 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1195 if (retry_count > 0) 1196 I802_DEBUG_INC(local->dot11RetryCount); 1197 if (retry_count > 1) 1198 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1199 } else { 1200 I802_DEBUG_INC(local->dot11FailedCount); 1201 } 1202 1203 free: 1204 if (!skb) 1205 return; 1206 1207 ieee80211_report_used_skb(local, skb, false); 1208 if (status->free_list) 1209 list_add_tail(&skb->list, status->free_list); 1210 else 1211 dev_kfree_skb(skb); 1212 } 1213 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1214 1215 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1216 struct ieee80211_sta *pubsta, 1217 struct ieee80211_tx_info *info) 1218 { 1219 struct ieee80211_local *local = hw_to_local(hw); 1220 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1221 struct ieee80211_tx_status status = { 1222 .info = info, 1223 .sta = pubsta, 1224 }; 1225 1226 rate_control_tx_status(local, &status); 1227 1228 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1229 sta->deflink.tx_stats.last_rate = info->status.rates[0]; 1230 } 1231 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1232 1233 void ieee80211_tx_status_8023(struct ieee80211_hw *hw, 1234 struct ieee80211_vif *vif, 1235 struct sk_buff *skb) 1236 { 1237 struct ieee80211_sub_if_data *sdata; 1238 struct ieee80211_tx_status status = { 1239 .skb = skb, 1240 .info = IEEE80211_SKB_CB(skb), 1241 }; 1242 struct sta_info *sta; 1243 1244 sdata = vif_to_sdata(vif); 1245 1246 rcu_read_lock(); 1247 1248 if (!ieee80211_lookup_ra_sta(sdata, skb, &sta) && !IS_ERR(sta)) 1249 status.sta = &sta->sta; 1250 1251 ieee80211_tx_status_ext(hw, &status); 1252 1253 rcu_read_unlock(); 1254 } 1255 EXPORT_SYMBOL(ieee80211_tx_status_8023); 1256 1257 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1258 { 1259 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1260 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1261 num_packets, GFP_ATOMIC); 1262 } 1263 EXPORT_SYMBOL(ieee80211_report_low_ack); 1264 1265 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1266 { 1267 struct ieee80211_local *local = hw_to_local(hw); 1268 1269 ieee80211_report_used_skb(local, skb, true); 1270 dev_kfree_skb_any(skb); 1271 } 1272 EXPORT_SYMBOL(ieee80211_free_txskb); 1273 1274 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1275 struct sk_buff_head *skbs) 1276 { 1277 struct sk_buff *skb; 1278 1279 while ((skb = __skb_dequeue(skbs))) 1280 ieee80211_free_txskb(hw, skb); 1281 } 1282