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->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 ieee80211_supported_band *sband, 297 struct sk_buff *skb, int retry_count, 298 int rtap_len, int shift, 299 struct ieee80211_tx_status *status) 300 { 301 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 302 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 303 struct ieee80211_radiotap_header *rthdr; 304 struct ieee80211_rate_status *status_rate = NULL; 305 unsigned char *pos; 306 u16 legacy_rate = 0; 307 u16 txflags; 308 309 if (status && status->n_rates) 310 status_rate = &status->rates[status->n_rates - 1]; 311 312 rthdr = skb_push(skb, rtap_len); 313 314 memset(rthdr, 0, rtap_len); 315 rthdr->it_len = cpu_to_le16(rtap_len); 316 rthdr->it_present = 317 cpu_to_le32(BIT(IEEE80211_RADIOTAP_TX_FLAGS) | 318 BIT(IEEE80211_RADIOTAP_DATA_RETRIES)); 319 pos = (unsigned char *)(rthdr + 1); 320 321 /* 322 * XXX: Once radiotap gets the bitmap reset thing the vendor 323 * extensions proposal contains, we can actually report 324 * the whole set of tries we did. 325 */ 326 327 /* IEEE80211_RADIOTAP_RATE */ 328 329 if (status_rate) { 330 if (!(status_rate->rate_idx.flags & 331 (RATE_INFO_FLAGS_MCS | 332 RATE_INFO_FLAGS_DMG | 333 RATE_INFO_FLAGS_EDMG | 334 RATE_INFO_FLAGS_VHT_MCS | 335 RATE_INFO_FLAGS_HE_MCS))) 336 legacy_rate = status_rate->rate_idx.legacy; 337 } else if (info->status.rates[0].idx >= 0 && 338 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | 339 IEEE80211_TX_RC_VHT_MCS))) 340 legacy_rate = 341 sband->bitrates[info->status.rates[0].idx].bitrate; 342 343 if (legacy_rate) { 344 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE)); 345 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift)); 346 /* padding for tx flags */ 347 pos += 2; 348 } 349 350 /* IEEE80211_RADIOTAP_TX_FLAGS */ 351 txflags = 0; 352 if (!(info->flags & IEEE80211_TX_STAT_ACK) && 353 !is_multicast_ether_addr(hdr->addr1)) 354 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; 355 356 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) 357 txflags |= IEEE80211_RADIOTAP_F_TX_CTS; 358 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) 359 txflags |= IEEE80211_RADIOTAP_F_TX_RTS; 360 361 put_unaligned_le16(txflags, pos); 362 pos += 2; 363 364 /* IEEE80211_RADIOTAP_DATA_RETRIES */ 365 /* for now report the total retry_count */ 366 *pos = retry_count; 367 pos++; 368 369 if (status_rate && (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS)) 370 { 371 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); 372 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 373 IEEE80211_RADIOTAP_MCS_HAVE_GI | 374 IEEE80211_RADIOTAP_MCS_HAVE_BW; 375 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI) 376 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 377 if (status_rate->rate_idx.bw == RATE_INFO_BW_40) 378 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 379 pos[2] = status_rate->rate_idx.mcs; 380 pos += 3; 381 } else if (status_rate && (status_rate->rate_idx.flags & 382 RATE_INFO_FLAGS_VHT_MCS)) 383 { 384 u16 known = local->hw.radiotap_vht_details & 385 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 386 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 387 388 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); 389 390 /* required alignment from rthdr */ 391 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 392 393 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 394 put_unaligned_le16(known, pos); 395 pos += 2; 396 397 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 398 if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI) 399 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 400 pos++; 401 402 /* u8 bandwidth */ 403 switch (status_rate->rate_idx.bw) { 404 case RATE_INFO_BW_160: 405 *pos = 11; 406 break; 407 case RATE_INFO_BW_80: 408 *pos = 4; 409 break; 410 case RATE_INFO_BW_40: 411 *pos = 1; 412 break; 413 default: 414 *pos = 0; 415 break; 416 } 417 pos++; 418 419 /* u8 mcs_nss[4] */ 420 *pos = (status_rate->rate_idx.mcs << 4) | 421 status_rate->rate_idx.nss; 422 pos += 4; 423 424 /* u8 coding */ 425 pos++; 426 /* u8 group_id */ 427 pos++; 428 /* u16 partial_aid */ 429 pos += 2; 430 } else if (status_rate && (status_rate->rate_idx.flags & 431 RATE_INFO_FLAGS_HE_MCS)) 432 { 433 struct ieee80211_radiotap_he *he; 434 435 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE)); 436 437 /* required alignment from rthdr */ 438 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 439 he = (struct ieee80211_radiotap_he *)pos; 440 441 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU | 442 IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN | 443 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN | 444 IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN); 445 446 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN); 447 448 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f) 449 450 he->data6 |= HE_PREP(DATA6_NSTS, status_rate->rate_idx.nss); 451 452 #define CHECK_GI(s) \ 453 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \ 454 (int)NL80211_RATE_INFO_HE_GI_##s) 455 456 CHECK_GI(0_8); 457 CHECK_GI(1_6); 458 CHECK_GI(3_2); 459 460 he->data3 |= HE_PREP(DATA3_DATA_MCS, status_rate->rate_idx.mcs); 461 he->data3 |= HE_PREP(DATA3_DATA_DCM, status_rate->rate_idx.he_dcm); 462 463 he->data5 |= HE_PREP(DATA5_GI, status_rate->rate_idx.he_gi); 464 465 switch (status_rate->rate_idx.bw) { 466 case RATE_INFO_BW_20: 467 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 468 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ); 469 break; 470 case RATE_INFO_BW_40: 471 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 472 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ); 473 break; 474 case RATE_INFO_BW_80: 475 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 476 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ); 477 break; 478 case RATE_INFO_BW_160: 479 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 480 IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ); 481 break; 482 case RATE_INFO_BW_HE_RU: 483 #define CHECK_RU_ALLOC(s) \ 484 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \ 485 NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4) 486 487 CHECK_RU_ALLOC(26); 488 CHECK_RU_ALLOC(52); 489 CHECK_RU_ALLOC(106); 490 CHECK_RU_ALLOC(242); 491 CHECK_RU_ALLOC(484); 492 CHECK_RU_ALLOC(996); 493 CHECK_RU_ALLOC(2x996); 494 495 he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC, 496 status_rate->rate_idx.he_ru_alloc + 4); 497 break; 498 default: 499 WARN_ONCE(1, "Invalid SU BW %d\n", status_rate->rate_idx.bw); 500 } 501 502 pos += sizeof(struct ieee80211_radiotap_he); 503 } 504 505 if (status_rate || info->status.rates[0].idx < 0) 506 return; 507 508 /* IEEE80211_RADIOTAP_MCS 509 * IEEE80211_RADIOTAP_VHT */ 510 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { 511 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS)); 512 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 513 IEEE80211_RADIOTAP_MCS_HAVE_GI | 514 IEEE80211_RADIOTAP_MCS_HAVE_BW; 515 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 516 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; 517 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 518 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; 519 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) 520 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; 521 pos[2] = info->status.rates[0].idx; 522 pos += 3; 523 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { 524 u16 known = local->hw.radiotap_vht_details & 525 (IEEE80211_RADIOTAP_VHT_KNOWN_GI | 526 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); 527 528 rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT)); 529 530 /* required alignment from rthdr */ 531 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); 532 533 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ 534 put_unaligned_le16(known, pos); 535 pos += 2; 536 537 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ 538 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) 539 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; 540 pos++; 541 542 /* u8 bandwidth */ 543 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 544 *pos = 1; 545 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 546 *pos = 4; 547 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) 548 *pos = 11; 549 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ 550 *pos = 0; 551 pos++; 552 553 /* u8 mcs_nss[4] */ 554 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | 555 ieee80211_rate_get_vht_nss(&info->status.rates[0]); 556 pos += 4; 557 558 /* u8 coding */ 559 pos++; 560 /* u8 group_id */ 561 pos++; 562 /* u16 partial_aid */ 563 pos += 2; 564 } 565 } 566 567 /* 568 * Handles the tx for TDLS teardown frames. 569 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP 570 */ 571 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, 572 struct ieee80211_sub_if_data *sdata, 573 struct sk_buff *skb, u32 flags) 574 { 575 struct sk_buff *teardown_skb; 576 struct sk_buff *orig_teardown_skb; 577 bool is_teardown = false; 578 579 /* Get the teardown data we need and free the lock */ 580 spin_lock(&sdata->u.mgd.teardown_lock); 581 teardown_skb = sdata->u.mgd.teardown_skb; 582 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; 583 if ((skb == orig_teardown_skb) && teardown_skb) { 584 sdata->u.mgd.teardown_skb = NULL; 585 sdata->u.mgd.orig_teardown_skb = NULL; 586 is_teardown = true; 587 } 588 spin_unlock(&sdata->u.mgd.teardown_lock); 589 590 if (is_teardown) { 591 /* This mechanism relies on being able to get ACKs */ 592 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)); 593 594 /* Check if peer has ACKed */ 595 if (flags & IEEE80211_TX_STAT_ACK) { 596 dev_kfree_skb_any(teardown_skb); 597 } else { 598 tdls_dbg(sdata, 599 "TDLS Resending teardown through AP\n"); 600 601 ieee80211_subif_start_xmit(teardown_skb, skb->dev); 602 } 603 } 604 } 605 606 static struct ieee80211_sub_if_data * 607 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb) 608 { 609 struct ieee80211_sub_if_data *sdata; 610 611 if (skb->dev) { 612 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 613 if (!sdata->dev) 614 continue; 615 616 if (skb->dev == sdata->dev) 617 return sdata; 618 } 619 620 return NULL; 621 } 622 623 return rcu_dereference(local->p2p_sdata); 624 } 625 626 static void ieee80211_report_ack_skb(struct ieee80211_local *local, 627 struct ieee80211_tx_info *info, 628 bool acked, bool dropped) 629 { 630 struct sk_buff *skb; 631 unsigned long flags; 632 633 spin_lock_irqsave(&local->ack_status_lock, flags); 634 skb = idr_remove(&local->ack_status_frames, info->ack_frame_id); 635 spin_unlock_irqrestore(&local->ack_status_lock, flags); 636 637 if (!skb) 638 return; 639 640 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { 641 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie; 642 struct ieee80211_sub_if_data *sdata; 643 struct ieee80211_hdr *hdr = (void *)skb->data; 644 bool is_valid_ack_signal = 645 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 646 647 rcu_read_lock(); 648 sdata = ieee80211_sdata_from_skb(local, skb); 649 if (sdata) { 650 if (skb->protocol == sdata->control_port_protocol || 651 skb->protocol == cpu_to_be16(ETH_P_PREAUTH)) 652 cfg80211_control_port_tx_status(&sdata->wdev, 653 cookie, 654 skb->data, 655 skb->len, 656 acked, 657 GFP_ATOMIC); 658 else if (ieee80211_is_any_nullfunc(hdr->frame_control)) 659 cfg80211_probe_status(sdata->dev, hdr->addr1, 660 cookie, acked, 661 info->status.ack_signal, 662 is_valid_ack_signal, 663 GFP_ATOMIC); 664 else if (ieee80211_is_mgmt(hdr->frame_control)) 665 cfg80211_mgmt_tx_status(&sdata->wdev, cookie, 666 skb->data, skb->len, 667 acked, GFP_ATOMIC); 668 else 669 pr_warn("Unknown status report in ack skb\n"); 670 671 } 672 rcu_read_unlock(); 673 674 dev_kfree_skb_any(skb); 675 } else if (dropped) { 676 dev_kfree_skb_any(skb); 677 } else { 678 /* consumes skb */ 679 skb_complete_wifi_ack(skb, acked); 680 } 681 } 682 683 static void ieee80211_report_used_skb(struct ieee80211_local *local, 684 struct sk_buff *skb, bool dropped) 685 { 686 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 687 u16 tx_time_est = ieee80211_info_get_tx_time_est(info); 688 struct ieee80211_hdr *hdr = (void *)skb->data; 689 bool acked = info->flags & IEEE80211_TX_STAT_ACK; 690 691 if (dropped) 692 acked = false; 693 694 if (tx_time_est) { 695 struct sta_info *sta; 696 697 rcu_read_lock(); 698 699 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 700 ieee80211_sta_update_pending_airtime(local, sta, 701 skb_get_queue_mapping(skb), 702 tx_time_est, 703 true); 704 rcu_read_unlock(); 705 } 706 707 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { 708 struct ieee80211_sub_if_data *sdata; 709 710 rcu_read_lock(); 711 712 sdata = ieee80211_sdata_from_skb(local, skb); 713 714 if (!sdata) { 715 skb->dev = NULL; 716 } else { 717 unsigned int hdr_size = 718 ieee80211_hdrlen(hdr->frame_control); 719 720 /* Check to see if packet is a TDLS teardown packet */ 721 if (ieee80211_is_data(hdr->frame_control) && 722 (ieee80211_get_tdls_action(skb, hdr_size) == 723 WLAN_TDLS_TEARDOWN)) { 724 ieee80211_tdls_td_tx_handle(local, sdata, skb, 725 info->flags); 726 } else if (ieee80211_s1g_is_twt_setup(skb)) { 727 if (!acked) { 728 struct sk_buff *qskb; 729 730 qskb = skb_clone(skb, GFP_ATOMIC); 731 if (qskb) { 732 skb_queue_tail(&sdata->status_queue, 733 qskb); 734 ieee80211_queue_work(&local->hw, 735 &sdata->work); 736 } 737 } 738 } else { 739 ieee80211_mgd_conn_tx_status(sdata, 740 hdr->frame_control, 741 acked); 742 } 743 } 744 745 rcu_read_unlock(); 746 } else if (info->ack_frame_id) { 747 ieee80211_report_ack_skb(local, info, acked, dropped); 748 } 749 750 if (!dropped && skb->destructor) { 751 skb->wifi_acked_valid = 1; 752 skb->wifi_acked = acked; 753 } 754 755 ieee80211_led_tx(local); 756 757 if (skb_has_frag_list(skb)) { 758 kfree_skb_list(skb_shinfo(skb)->frag_list); 759 skb_shinfo(skb)->frag_list = NULL; 760 } 761 } 762 763 /* 764 * Use a static threshold for now, best value to be determined 765 * by testing ... 766 * Should it depend on: 767 * - on # of retransmissions 768 * - current throughput (higher value for higher tpt)? 769 */ 770 #define STA_LOST_PKT_THRESHOLD 50 771 #define STA_LOST_PKT_TIME HZ /* 1 sec since last ACK */ 772 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ 773 774 static void ieee80211_lost_packet(struct sta_info *sta, 775 struct ieee80211_tx_info *info) 776 { 777 unsigned long pkt_time = STA_LOST_PKT_TIME; 778 unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD; 779 780 /* If driver relies on its own algorithm for station kickout, skip 781 * mac80211 packet loss mechanism. 782 */ 783 if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK)) 784 return; 785 786 /* This packet was aggregated but doesn't carry status info */ 787 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 788 !(info->flags & IEEE80211_TX_STAT_AMPDU)) 789 return; 790 791 sta->deflink.status_stats.lost_packets++; 792 if (sta->sta.tdls) { 793 pkt_time = STA_LOST_TDLS_PKT_TIME; 794 pkt_thr = STA_LOST_PKT_THRESHOLD; 795 } 796 797 /* 798 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD 799 * of the last packets were lost, and that no ACK was received in the 800 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss 801 * mechanism. 802 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME 803 */ 804 if (sta->deflink.status_stats.lost_packets < pkt_thr || 805 !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time)) 806 return; 807 808 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 809 sta->deflink.status_stats.lost_packets, 810 GFP_ATOMIC); 811 sta->deflink.status_stats.lost_packets = 0; 812 } 813 814 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw, 815 struct ieee80211_tx_info *info, 816 int *retry_count) 817 { 818 int count = -1; 819 int i; 820 821 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { 822 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && 823 !(info->flags & IEEE80211_TX_STAT_AMPDU)) { 824 /* just the first aggr frame carry status info */ 825 info->status.rates[i].idx = -1; 826 info->status.rates[i].count = 0; 827 break; 828 } else if (info->status.rates[i].idx < 0) { 829 break; 830 } else if (i >= hw->max_report_rates) { 831 /* the HW cannot have attempted that rate */ 832 info->status.rates[i].idx = -1; 833 info->status.rates[i].count = 0; 834 break; 835 } 836 837 count += info->status.rates[i].count; 838 } 839 840 if (count < 0) 841 count = 0; 842 843 *retry_count = count; 844 return i - 1; 845 } 846 847 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb, 848 struct ieee80211_supported_band *sband, 849 int retry_count, int shift, bool send_to_cooked, 850 struct ieee80211_tx_status *status) 851 { 852 struct sk_buff *skb2; 853 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 854 struct ieee80211_sub_if_data *sdata; 855 struct net_device *prev_dev = NULL; 856 int rtap_len; 857 858 /* send frame to monitor interfaces now */ 859 rtap_len = ieee80211_tx_radiotap_len(info, status); 860 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { 861 pr_err("ieee80211_tx_status: headroom too small\n"); 862 dev_kfree_skb(skb); 863 return; 864 } 865 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, 866 rtap_len, shift, status); 867 868 /* XXX: is this sufficient for BPF? */ 869 skb_reset_mac_header(skb); 870 skb->ip_summed = CHECKSUM_UNNECESSARY; 871 skb->pkt_type = PACKET_OTHERHOST; 872 skb->protocol = htons(ETH_P_802_2); 873 memset(skb->cb, 0, sizeof(skb->cb)); 874 875 rcu_read_lock(); 876 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 877 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { 878 if (!ieee80211_sdata_running(sdata)) 879 continue; 880 881 if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) && 882 !send_to_cooked) 883 continue; 884 885 if (prev_dev) { 886 skb2 = skb_clone(skb, GFP_ATOMIC); 887 if (skb2) { 888 skb2->dev = prev_dev; 889 netif_rx(skb2); 890 } 891 } 892 893 prev_dev = sdata->dev; 894 } 895 } 896 if (prev_dev) { 897 skb->dev = prev_dev; 898 netif_rx(skb); 899 skb = NULL; 900 } 901 rcu_read_unlock(); 902 dev_kfree_skb(skb); 903 } 904 905 static void __ieee80211_tx_status(struct ieee80211_hw *hw, 906 struct ieee80211_tx_status *status, 907 int rates_idx, int retry_count) 908 { 909 struct sk_buff *skb = status->skb; 910 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 911 struct ieee80211_local *local = hw_to_local(hw); 912 struct ieee80211_tx_info *info = status->info; 913 struct sta_info *sta; 914 __le16 fc; 915 struct ieee80211_supported_band *sband; 916 bool send_to_cooked; 917 bool acked; 918 bool noack_success; 919 struct ieee80211_bar *bar; 920 int shift = 0; 921 int tid = IEEE80211_NUM_TIDS; 922 923 sband = local->hw.wiphy->bands[info->band]; 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 } else if (wiphy_ext_feature_isset(local->hw.wiphy, 1002 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS)) { 1003 struct ieee80211_sub_if_data *sdata; 1004 struct ieee80211_txq *txq; 1005 u32 airtime; 1006 1007 /* Account airtime to multicast queue */ 1008 sdata = ieee80211_sdata_from_skb(local, skb); 1009 1010 if (sdata && (txq = sdata->vif.txq)) { 1011 airtime = info->status.tx_time ?: 1012 ieee80211_calc_expected_tx_airtime(hw, 1013 &sdata->vif, 1014 NULL, 1015 skb->len, 1016 false); 1017 1018 ieee80211_register_airtime(txq, airtime, 0); 1019 } 1020 } 1021 1022 /* SNMP counters 1023 * Fragments are passed to low-level drivers as separate skbs, so these 1024 * are actually fragments, not frames. Update frame counters only for 1025 * the first fragment of the frame. */ 1026 if ((info->flags & IEEE80211_TX_STAT_ACK) || 1027 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) { 1028 if (ieee80211_is_first_frag(hdr->seq_ctrl)) { 1029 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1030 if (is_multicast_ether_addr(ieee80211_get_DA(hdr))) 1031 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1032 if (retry_count > 0) 1033 I802_DEBUG_INC(local->dot11RetryCount); 1034 if (retry_count > 1) 1035 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1036 } 1037 1038 /* This counter shall be incremented for an acknowledged MPDU 1039 * with an individual address in the address 1 field or an MPDU 1040 * with a multicast address in the address 1 field of type Data 1041 * or Management. */ 1042 if (!is_multicast_ether_addr(hdr->addr1) || 1043 ieee80211_is_data(fc) || 1044 ieee80211_is_mgmt(fc)) 1045 I802_DEBUG_INC(local->dot11TransmittedFragmentCount); 1046 } else { 1047 if (ieee80211_is_first_frag(hdr->seq_ctrl)) 1048 I802_DEBUG_INC(local->dot11FailedCount); 1049 } 1050 1051 if (ieee80211_is_any_nullfunc(fc) && 1052 ieee80211_has_pm(fc) && 1053 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1054 !(info->flags & IEEE80211_TX_CTL_INJECTED) && 1055 local->ps_sdata && !(local->scanning)) { 1056 if (info->flags & IEEE80211_TX_STAT_ACK) 1057 local->ps_sdata->u.mgd.flags |= 1058 IEEE80211_STA_NULLFUNC_ACKED; 1059 mod_timer(&local->dynamic_ps_timer, 1060 jiffies + msecs_to_jiffies(10)); 1061 } 1062 1063 ieee80211_report_used_skb(local, skb, false); 1064 1065 /* this was a transmitted frame, but now we want to reuse it */ 1066 skb_orphan(skb); 1067 1068 /* Need to make a copy before skb->cb gets cleared */ 1069 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || 1070 !(ieee80211_is_data(fc)); 1071 1072 /* 1073 * This is a bit racy but we can avoid a lot of work 1074 * with this test... 1075 */ 1076 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { 1077 if (status->free_list) 1078 list_add_tail(&skb->list, status->free_list); 1079 else 1080 dev_kfree_skb(skb); 1081 return; 1082 } 1083 1084 /* send to monitor interfaces */ 1085 ieee80211_tx_monitor(local, skb, sband, retry_count, shift, 1086 send_to_cooked, status); 1087 } 1088 1089 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) 1090 { 1091 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 1092 struct ieee80211_local *local = hw_to_local(hw); 1093 struct ieee80211_tx_status status = { 1094 .skb = skb, 1095 .info = IEEE80211_SKB_CB(skb), 1096 }; 1097 struct sta_info *sta; 1098 1099 rcu_read_lock(); 1100 1101 sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2); 1102 if (sta) 1103 status.sta = &sta->sta; 1104 1105 ieee80211_tx_status_ext(hw, &status); 1106 rcu_read_unlock(); 1107 } 1108 EXPORT_SYMBOL(ieee80211_tx_status); 1109 1110 void ieee80211_tx_status_ext(struct ieee80211_hw *hw, 1111 struct ieee80211_tx_status *status) 1112 { 1113 struct ieee80211_local *local = hw_to_local(hw); 1114 struct ieee80211_tx_info *info = status->info; 1115 struct ieee80211_sta *pubsta = status->sta; 1116 struct sk_buff *skb = status->skb; 1117 struct ieee80211_supported_band *sband; 1118 struct sta_info *sta = NULL; 1119 int rates_idx, retry_count; 1120 bool acked, noack_success, ack_signal_valid; 1121 u16 tx_time_est; 1122 1123 if (pubsta) { 1124 sta = container_of(pubsta, struct sta_info, sta); 1125 1126 if (status->n_rates) 1127 sta->deflink.tx_stats.last_rate_info = 1128 status->rates[status->n_rates - 1].rate_idx; 1129 } 1130 1131 if (skb && (tx_time_est = 1132 ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) { 1133 /* Do this here to avoid the expensive lookup of the sta 1134 * in ieee80211_report_used_skb(). 1135 */ 1136 ieee80211_sta_update_pending_airtime(local, sta, 1137 skb_get_queue_mapping(skb), 1138 tx_time_est, 1139 true); 1140 ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0); 1141 } 1142 1143 if (!status->info) 1144 goto free; 1145 1146 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count); 1147 1148 sband = hw->wiphy->bands[info->band]; 1149 1150 acked = !!(info->flags & IEEE80211_TX_STAT_ACK); 1151 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED); 1152 ack_signal_valid = 1153 !!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID); 1154 1155 if (pubsta) { 1156 struct ieee80211_sub_if_data *sdata = sta->sdata; 1157 1158 if (!acked && !noack_success) 1159 sta->deflink.status_stats.retry_failed++; 1160 sta->deflink.status_stats.retry_count += retry_count; 1161 1162 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 1163 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1164 skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1165 ieee80211_sta_tx_notify(sdata, (void *) skb->data, 1166 acked, info->status.tx_time); 1167 1168 if (acked) { 1169 sta->deflink.status_stats.last_ack = jiffies; 1170 1171 if (sta->deflink.status_stats.lost_packets) 1172 sta->deflink.status_stats.lost_packets = 0; 1173 1174 /* Track when last packet was ACKed */ 1175 sta->deflink.status_stats.last_pkt_time = jiffies; 1176 1177 /* Reset connection monitor */ 1178 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1179 unlikely(sdata->u.mgd.probe_send_count > 0)) 1180 sdata->u.mgd.probe_send_count = 0; 1181 1182 if (ack_signal_valid) { 1183 sta->deflink.status_stats.last_ack_signal = 1184 (s8)info->status.ack_signal; 1185 sta->deflink.status_stats.ack_signal_filled = true; 1186 ewma_avg_signal_add(&sta->deflink.status_stats.avg_ack_signal, 1187 -info->status.ack_signal); 1188 } 1189 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) { 1190 /* 1191 * The STA is in power save mode, so assume 1192 * that this TX packet failed because of that. 1193 */ 1194 if (skb) 1195 ieee80211_handle_filtered_frame(local, sta, skb); 1196 return; 1197 } else if (noack_success) { 1198 /* nothing to do here, do not account as lost */ 1199 } else { 1200 ieee80211_lost_packet(sta, info); 1201 } 1202 } 1203 1204 rate_control_tx_status(local, sband, status); 1205 if (ieee80211_vif_is_mesh(&sta->sdata->vif)) 1206 ieee80211s_update_metric(local, sta, status); 1207 } 1208 1209 if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) 1210 return __ieee80211_tx_status(hw, status, rates_idx, 1211 retry_count); 1212 1213 if (acked || noack_success) { 1214 I802_DEBUG_INC(local->dot11TransmittedFrameCount); 1215 if (!pubsta) 1216 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount); 1217 if (retry_count > 0) 1218 I802_DEBUG_INC(local->dot11RetryCount); 1219 if (retry_count > 1) 1220 I802_DEBUG_INC(local->dot11MultipleRetryCount); 1221 } else { 1222 I802_DEBUG_INC(local->dot11FailedCount); 1223 } 1224 1225 free: 1226 if (!skb) 1227 return; 1228 1229 ieee80211_report_used_skb(local, skb, false); 1230 if (status->free_list) 1231 list_add_tail(&skb->list, status->free_list); 1232 else 1233 dev_kfree_skb(skb); 1234 } 1235 EXPORT_SYMBOL(ieee80211_tx_status_ext); 1236 1237 void ieee80211_tx_rate_update(struct ieee80211_hw *hw, 1238 struct ieee80211_sta *pubsta, 1239 struct ieee80211_tx_info *info) 1240 { 1241 struct ieee80211_local *local = hw_to_local(hw); 1242 struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band]; 1243 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1244 struct ieee80211_tx_status status = { 1245 .info = info, 1246 .sta = pubsta, 1247 }; 1248 1249 rate_control_tx_status(local, sband, &status); 1250 1251 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 1252 sta->deflink.tx_stats.last_rate = info->status.rates[0]; 1253 } 1254 EXPORT_SYMBOL(ieee80211_tx_rate_update); 1255 1256 void ieee80211_tx_status_8023(struct ieee80211_hw *hw, 1257 struct ieee80211_vif *vif, 1258 struct sk_buff *skb) 1259 { 1260 struct ieee80211_sub_if_data *sdata; 1261 struct ieee80211_tx_status status = { 1262 .skb = skb, 1263 .info = IEEE80211_SKB_CB(skb), 1264 }; 1265 struct sta_info *sta; 1266 1267 sdata = vif_to_sdata(vif); 1268 1269 rcu_read_lock(); 1270 1271 if (!ieee80211_lookup_ra_sta(sdata, skb, &sta) && !IS_ERR(sta)) 1272 status.sta = &sta->sta; 1273 1274 ieee80211_tx_status_ext(hw, &status); 1275 1276 rcu_read_unlock(); 1277 } 1278 EXPORT_SYMBOL(ieee80211_tx_status_8023); 1279 1280 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) 1281 { 1282 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1283 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, 1284 num_packets, GFP_ATOMIC); 1285 } 1286 EXPORT_SYMBOL(ieee80211_report_low_ack); 1287 1288 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) 1289 { 1290 struct ieee80211_local *local = hw_to_local(hw); 1291 1292 ieee80211_report_used_skb(local, skb, true); 1293 dev_kfree_skb_any(skb); 1294 } 1295 EXPORT_SYMBOL(ieee80211_free_txskb); 1296 1297 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, 1298 struct sk_buff_head *skbs) 1299 { 1300 struct sk_buff *skb; 1301 1302 while ((skb = __skb_dequeue(skbs))) 1303 ieee80211_free_txskb(hw, skb); 1304 } 1305