1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2021 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH 6 */ 7 #include <asm/unaligned.h> 8 #include <linux/etherdevice.h> 9 #include <linux/skbuff.h> 10 #include "iwl-trans.h" 11 #include "mvm.h" 12 #include "fw-api.h" 13 14 /* 15 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler 16 * 17 * Copies the phy information in mvm->last_phy_info, it will be used when the 18 * actual data will come from the fw in the next packet. 19 */ 20 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 21 { 22 struct iwl_rx_packet *pkt = rxb_addr(rxb); 23 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt); 24 25 if (unlikely(pkt_len < sizeof(mvm->last_phy_info))) 26 return; 27 28 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info)); 29 mvm->ampdu_ref++; 30 31 #ifdef CONFIG_IWLWIFI_DEBUGFS 32 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 33 spin_lock(&mvm->drv_stats_lock); 34 mvm->drv_rx_stats.ampdu_count++; 35 spin_unlock(&mvm->drv_stats_lock); 36 } 37 #endif 38 } 39 40 /* 41 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211 42 * 43 * Adds the rxb to a new skb and give it to mac80211 44 */ 45 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 46 struct ieee80211_sta *sta, 47 struct napi_struct *napi, 48 struct sk_buff *skb, 49 struct ieee80211_hdr *hdr, u16 len, 50 u8 crypt_len, 51 struct iwl_rx_cmd_buffer *rxb) 52 { 53 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 54 unsigned int fraglen; 55 56 /* 57 * The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len, 58 * but those are all multiples of 4 long) all goes away, but we 59 * want the *end* of it, which is going to be the start of the IP 60 * header, to be aligned when it gets pulled in. 61 * The beginning of the skb->data is aligned on at least a 4-byte 62 * boundary after allocation. Everything here is aligned at least 63 * on a 2-byte boundary so we can just take hdrlen & 3 and pad by 64 * the result. 65 */ 66 skb_reserve(skb, hdrlen & 3); 67 68 /* If frame is small enough to fit in skb->head, pull it completely. 69 * If not, only pull ieee80211_hdr (including crypto if present, and 70 * an additional 8 bytes for SNAP/ethertype, see below) so that 71 * splice() or TCP coalesce are more efficient. 72 * 73 * Since, in addition, ieee80211_data_to_8023() always pull in at 74 * least 8 bytes (possibly more for mesh) we can do the same here 75 * to save the cost of doing it later. That still doesn't pull in 76 * the actual IP header since the typical case has a SNAP header. 77 * If the latter changes (there are efforts in the standards group 78 * to do so) we should revisit this and ieee80211_data_to_8023(). 79 */ 80 hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8; 81 82 skb_put_data(skb, hdr, hdrlen); 83 fraglen = len - hdrlen; 84 85 if (fraglen) { 86 int offset = (u8 *)hdr + hdrlen - 87 (u8 *)rxb_addr(rxb) + rxb_offset(rxb); 88 89 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 90 fraglen, rxb->truesize); 91 } 92 93 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 94 } 95 96 /* 97 * iwl_mvm_get_signal_strength - use new rx PHY INFO API 98 * values are reported by the fw as positive values - need to negate 99 * to obtain their dBM. Account for missing antennas by replacing 0 100 * values by -256dBm: practically 0 power and a non-feasible 8 bit value. 101 */ 102 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 103 struct iwl_rx_phy_info *phy_info, 104 struct ieee80211_rx_status *rx_status) 105 { 106 int energy_a, energy_b, max_energy; 107 u32 val; 108 109 val = 110 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]); 111 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> 112 IWL_RX_INFO_ENERGY_ANT_A_POS; 113 energy_a = energy_a ? -energy_a : S8_MIN; 114 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> 115 IWL_RX_INFO_ENERGY_ANT_B_POS; 116 energy_b = energy_b ? -energy_b : S8_MIN; 117 max_energy = max(energy_a, energy_b); 118 119 IWL_DEBUG_STATS(mvm, "energy In A %d B %d , and max %d\n", 120 energy_a, energy_b, max_energy); 121 122 rx_status->signal = max_energy; 123 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) & 124 RX_RES_PHY_FLAGS_ANTENNA) 125 >> RX_RES_PHY_FLAGS_ANTENNA_POS; 126 rx_status->chain_signal[0] = energy_a; 127 rx_status->chain_signal[1] = energy_b; 128 } 129 130 /* 131 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format 132 * @mvm: the mvm object 133 * @hdr: 80211 header 134 * @stats: status in mac80211's format 135 * @rx_pkt_status: status coming from fw 136 * 137 * returns non 0 value if the packet should be dropped 138 */ 139 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, 140 struct ieee80211_hdr *hdr, 141 struct ieee80211_rx_status *stats, 142 u32 rx_pkt_status, 143 u8 *crypt_len) 144 { 145 if (!ieee80211_has_protected(hdr->frame_control) || 146 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 147 RX_MPDU_RES_STATUS_SEC_NO_ENC) 148 return 0; 149 150 /* packet was encrypted with unknown alg */ 151 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 152 RX_MPDU_RES_STATUS_SEC_ENC_ERR) 153 return 0; 154 155 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { 156 case RX_MPDU_RES_STATUS_SEC_CCM_ENC: 157 /* alg is CCM: check MIC only */ 158 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 159 return -1; 160 161 stats->flag |= RX_FLAG_DECRYPTED; 162 *crypt_len = IEEE80211_CCMP_HDR_LEN; 163 return 0; 164 165 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: 166 /* Don't drop the frame and decrypt it in SW */ 167 if (!fw_has_api(&mvm->fw->ucode_capa, 168 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 169 !(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) 170 return 0; 171 *crypt_len = IEEE80211_TKIP_IV_LEN; 172 fallthrough; 173 174 case RX_MPDU_RES_STATUS_SEC_WEP_ENC: 175 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) 176 return -1; 177 178 stats->flag |= RX_FLAG_DECRYPTED; 179 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 180 RX_MPDU_RES_STATUS_SEC_WEP_ENC) 181 *crypt_len = IEEE80211_WEP_IV_LEN; 182 return 0; 183 184 case RX_MPDU_RES_STATUS_SEC_EXT_ENC: 185 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 186 return -1; 187 stats->flag |= RX_FLAG_DECRYPTED; 188 return 0; 189 190 default: 191 /* Expected in monitor (not having the keys) */ 192 #if defined(__linux__) 193 if (!mvm->monitor_on) 194 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); 195 #elif defined(__FreeBSD__) 196 if (!mvm->monitor_on && net_ratelimit()) 197 IWL_ERR(mvm, "%s: Unhandled alg: 0x%x\n", 198 __func__, rx_pkt_status); 199 #endif 200 } 201 202 return 0; 203 } 204 205 static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm, 206 struct ieee80211_sta *sta, 207 struct ieee80211_hdr *hdr, u32 len, 208 struct iwl_rx_phy_info *phy_info, 209 u32 rate_n_flags) 210 { 211 struct iwl_mvm_sta *mvmsta; 212 struct iwl_mvm_tcm_mac *mdata; 213 int mac; 214 int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */ 215 struct iwl_mvm_vif *mvmvif; 216 /* expected throughput in 100Kbps, single stream, 20 MHz */ 217 static const u8 thresh_tpt[] = { 218 9, 18, 30, 42, 60, 78, 90, 96, 120, 135, 219 }; 220 u16 thr; 221 222 if (ieee80211_is_data_qos(hdr->frame_control)) 223 ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)]; 224 225 mvmsta = iwl_mvm_sta_from_mac80211(sta); 226 mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 227 228 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 229 schedule_delayed_work(&mvm->tcm.work, 0); 230 mdata = &mvm->tcm.data[mac]; 231 mdata->rx.pkts[ac]++; 232 233 /* count the airtime only once for each ampdu */ 234 if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) { 235 mdata->rx.last_ampdu_ref = mvm->ampdu_ref; 236 mdata->rx.airtime += le16_to_cpu(phy_info->frame_time); 237 } 238 239 if (!(rate_n_flags & (RATE_MCS_HT_MSK_V1 | RATE_MCS_VHT_MSK_V1))) 240 return; 241 242 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 243 244 if (mdata->opened_rx_ba_sessions || 245 mdata->uapsd_nonagg_detect.detected || 246 (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd && 247 !mvmvif->queue_params[IEEE80211_AC_VI].uapsd && 248 !mvmvif->queue_params[IEEE80211_AC_BE].uapsd && 249 !mvmvif->queue_params[IEEE80211_AC_BK].uapsd) || 250 mvmsta->sta_id != mvmvif->ap_sta_id) 251 return; 252 253 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 254 thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK_V1]; 255 thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK_V1) >> 256 RATE_HT_MCS_NSS_POS_V1); 257 } else { 258 if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >= 259 ARRAY_SIZE(thresh_tpt))) 260 return; 261 thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK]; 262 thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 263 RATE_VHT_MCS_NSS_POS); 264 } 265 266 thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) >> 267 RATE_MCS_CHAN_WIDTH_POS); 268 269 mdata->uapsd_nonagg_detect.rx_bytes += len; 270 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr); 271 } 272 273 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 274 struct sk_buff *skb, 275 u32 status) 276 { 277 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 278 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 279 280 if (mvmvif->features & NETIF_F_RXCSUM && 281 status & RX_MPDU_RES_STATUS_CSUM_DONE && 282 status & RX_MPDU_RES_STATUS_CSUM_OK) 283 skb->ip_summed = CHECKSUM_UNNECESSARY; 284 } 285 286 /* 287 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 288 * 289 * Handles the actual data of the Rx packet from the fw 290 */ 291 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, 292 struct iwl_rx_cmd_buffer *rxb) 293 { 294 struct ieee80211_hdr *hdr; 295 struct ieee80211_rx_status *rx_status; 296 struct iwl_rx_packet *pkt = rxb_addr(rxb); 297 struct iwl_rx_phy_info *phy_info; 298 struct iwl_rx_mpdu_res_start *rx_res; 299 struct ieee80211_sta *sta = NULL; 300 struct sk_buff *skb; 301 u32 len, pkt_len = iwl_rx_packet_payload_len(pkt); 302 u32 rate_n_flags; 303 u32 rx_pkt_status; 304 u8 crypt_len = 0; 305 306 if (unlikely(pkt_len < sizeof(*rx_res))) { 307 IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n"); 308 return; 309 } 310 311 phy_info = &mvm->last_phy_info; 312 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 313 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 314 len = le16_to_cpu(rx_res->byte_count); 315 316 if (unlikely(len + sizeof(*rx_res) + sizeof(__le32) > pkt_len)) { 317 IWL_DEBUG_DROP(mvm, "FW lied about packet len\n"); 318 return; 319 } 320 321 rx_pkt_status = get_unaligned_le32((__le32 *) 322 (pkt->data + sizeof(*rx_res) + len)); 323 324 /* Dont use dev_alloc_skb(), we'll have enough headroom once 325 * ieee80211_hdr pulled. 326 */ 327 skb = alloc_skb(128, GFP_ATOMIC); 328 if (!skb) { 329 IWL_ERR(mvm, "alloc_skb failed\n"); 330 return; 331 } 332 333 rx_status = IEEE80211_SKB_RXCB(skb); 334 335 /* 336 * drop the packet if it has failed being decrypted by HW 337 */ 338 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, 339 &crypt_len)) { 340 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 341 rx_pkt_status); 342 kfree_skb(skb); 343 return; 344 } 345 346 /* 347 * Keep packets with CRC errors (and with overrun) for monitor mode 348 * (otherwise the firmware discards them) but mark them as bad. 349 */ 350 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 351 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 352 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 353 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 354 } 355 356 /* This will be used in several places later */ 357 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 358 359 /* rx_status carries information about the packet to mac80211 */ 360 rx_status->mactime = le64_to_cpu(phy_info->timestamp); 361 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); 362 rx_status->band = 363 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 364 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 365 rx_status->freq = 366 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 367 rx_status->band); 368 369 /* TSF as indicated by the firmware is at INA time */ 370 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 371 372 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); 373 374 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, 375 (unsigned long long)rx_status->mactime); 376 377 rcu_read_lock(); 378 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { 379 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; 380 381 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; 382 383 if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) { 384 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 385 if (IS_ERR(sta)) 386 sta = NULL; 387 } 388 } else if (!is_multicast_ether_addr(hdr->addr2)) { 389 /* This is fine since we prevent two stations with the same 390 * address from being added. 391 */ 392 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 393 } 394 395 if (sta) { 396 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 397 struct ieee80211_vif *tx_blocked_vif = 398 rcu_dereference(mvm->csa_tx_blocked_vif); 399 struct iwl_fw_dbg_trigger_tlv *trig; 400 struct ieee80211_vif *vif = mvmsta->vif; 401 402 /* We have tx blocked stations (with CS bit). If we heard 403 * frames from a blocked station on a new channel we can 404 * TX to it again. 405 */ 406 if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) { 407 struct iwl_mvm_vif *mvmvif = 408 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 409 410 if (mvmvif->csa_target_freq == rx_status->freq) 411 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 412 false); 413 } 414 415 rs_update_last_rssi(mvm, mvmsta, rx_status); 416 417 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 418 ieee80211_vif_to_wdev(vif), 419 FW_DBG_TRIGGER_RSSI); 420 421 if (trig && ieee80211_is_beacon(hdr->frame_control)) { 422 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 423 s32 rssi; 424 425 rssi_trig = (void *)trig->data; 426 rssi = le32_to_cpu(rssi_trig->rssi); 427 428 if (rx_status->signal < rssi) 429 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 430 #if defined(__linux__) 431 NULL); 432 #elif defined(__FreeBSD__) 433 ""); 434 #endif 435 } 436 437 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 438 !is_multicast_ether_addr(hdr->addr1) && 439 ieee80211_is_data(hdr->frame_control)) 440 iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info, 441 rate_n_flags); 442 443 if (ieee80211_is_data(hdr->frame_control)) 444 iwl_mvm_rx_csum(sta, skb, rx_pkt_status); 445 } 446 rcu_read_unlock(); 447 448 /* set the preamble flag if appropriate */ 449 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 450 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 451 452 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 453 /* 454 * We know which subframes of an A-MPDU belong 455 * together since we get a single PHY response 456 * from the firmware for all of them 457 */ 458 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 459 rx_status->ampdu_reference = mvm->ampdu_ref; 460 } 461 462 /* Set up the HT phy flags */ 463 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) { 464 case RATE_MCS_CHAN_WIDTH_20: 465 break; 466 case RATE_MCS_CHAN_WIDTH_40: 467 rx_status->bw = RATE_INFO_BW_40; 468 break; 469 case RATE_MCS_CHAN_WIDTH_80: 470 rx_status->bw = RATE_INFO_BW_80; 471 break; 472 case RATE_MCS_CHAN_WIDTH_160: 473 rx_status->bw = RATE_INFO_BW_160; 474 break; 475 } 476 if (!(rate_n_flags & RATE_MCS_CCK_MSK_V1) && 477 rate_n_flags & RATE_MCS_SGI_MSK_V1) 478 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 479 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 480 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 481 if (rate_n_flags & RATE_MCS_LDPC_MSK_V1) 482 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 483 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 484 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 485 RATE_MCS_STBC_POS; 486 rx_status->encoding = RX_ENC_HT; 487 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 488 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 489 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 490 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 491 RATE_MCS_STBC_POS; 492 rx_status->nss = 493 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 494 RATE_VHT_MCS_NSS_POS) + 1; 495 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 496 rx_status->encoding = RX_ENC_VHT; 497 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 498 if (rate_n_flags & RATE_MCS_BF_MSK) 499 rx_status->enc_flags |= RX_ENC_FLAG_BF; 500 } else { 501 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 502 rx_status->band); 503 504 if (WARN(rate < 0 || rate > 0xFF, 505 "Invalid rate flags 0x%x, band %d,\n", 506 rate_n_flags, rx_status->band)) { 507 kfree_skb(skb); 508 return; 509 } 510 rx_status->rate_idx = rate; 511 } 512 513 #ifdef CONFIG_IWLWIFI_DEBUGFS 514 iwl_mvm_update_frame_stats(mvm, rate_n_flags, 515 rx_status->flag & RX_FLAG_AMPDU_DETAILS); 516 #endif 517 518 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 519 ieee80211_is_probe_resp(hdr->frame_control)) && 520 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) 521 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 522 523 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 524 ieee80211_is_probe_resp(hdr->frame_control))) 525 rx_status->boottime_ns = ktime_get_boottime_ns(); 526 527 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, 528 crypt_len, rxb); 529 } 530 531 struct iwl_mvm_stat_data { 532 struct iwl_mvm *mvm; 533 __le32 flags; 534 __le32 mac_id; 535 u8 beacon_filter_average_energy; 536 __le32 *beacon_counter; 537 u8 *beacon_average_energy; 538 }; 539 540 struct iwl_mvm_stat_data_all_macs { 541 struct iwl_mvm *mvm; 542 __le32 flags; 543 struct iwl_statistics_ntfy_per_mac *per_mac_stats; 544 }; 545 546 static void iwl_mvm_update_vif_sig(struct ieee80211_vif *vif, int sig) 547 { 548 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 549 struct iwl_mvm *mvm = mvmvif->mvm; 550 int thold = vif->bss_conf.cqm_rssi_thold; 551 int hyst = vif->bss_conf.cqm_rssi_hyst; 552 int last_event; 553 554 if (sig == 0) { 555 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); 556 return; 557 } 558 559 mvmvif->bf_data.ave_beacon_signal = sig; 560 561 /* BT Coex */ 562 if (mvmvif->bf_data.bt_coex_min_thold != 563 mvmvif->bf_data.bt_coex_max_thold) { 564 last_event = mvmvif->bf_data.last_bt_coex_event; 565 if (sig > mvmvif->bf_data.bt_coex_max_thold && 566 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 567 last_event == 0)) { 568 mvmvif->bf_data.last_bt_coex_event = sig; 569 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 570 sig); 571 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 572 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 573 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 574 last_event == 0)) { 575 mvmvif->bf_data.last_bt_coex_event = sig; 576 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 577 sig); 578 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 579 } 580 } 581 582 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 583 return; 584 585 /* CQM Notification */ 586 last_event = mvmvif->bf_data.last_cqm_event; 587 if (thold && sig < thold && (last_event == 0 || 588 sig < last_event - hyst)) { 589 mvmvif->bf_data.last_cqm_event = sig; 590 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 591 sig); 592 ieee80211_cqm_rssi_notify( 593 vif, 594 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 595 sig, 596 GFP_KERNEL); 597 } else if (sig > thold && 598 (last_event == 0 || sig > last_event + hyst)) { 599 mvmvif->bf_data.last_cqm_event = sig; 600 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 601 sig); 602 ieee80211_cqm_rssi_notify( 603 vif, 604 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 605 sig, 606 GFP_KERNEL); 607 } 608 } 609 610 static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 611 struct ieee80211_vif *vif) 612 { 613 struct iwl_mvm_stat_data *data = _data; 614 int sig = -data->beacon_filter_average_energy; 615 u16 id = le32_to_cpu(data->mac_id); 616 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 617 u16 vif_id = mvmvif->id; 618 619 /* This doesn't need the MAC ID check since it's not taking the 620 * data copied into the "data" struct, but rather the data from 621 * the notification directly. 622 */ 623 mvmvif->beacon_stats.num_beacons = 624 le32_to_cpu(data->beacon_counter[vif_id]); 625 mvmvif->beacon_stats.avg_signal = 626 -data->beacon_average_energy[vif_id]; 627 628 if (mvmvif->id != id) 629 return; 630 631 if (vif->type != NL80211_IFTYPE_STATION) 632 return; 633 634 /* make sure that beacon statistics don't go backwards with TCM 635 * request to clear statistics 636 */ 637 if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 638 mvmvif->beacon_stats.accu_num_beacons += 639 mvmvif->beacon_stats.num_beacons; 640 641 iwl_mvm_update_vif_sig(vif, sig); 642 } 643 644 static void iwl_mvm_stat_iterator_all_macs(void *_data, u8 *mac, 645 struct ieee80211_vif *vif) 646 { 647 struct iwl_mvm_stat_data_all_macs *data = _data; 648 struct iwl_statistics_ntfy_per_mac *mac_stats; 649 int sig; 650 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 651 u16 vif_id = mvmvif->id; 652 653 if (WARN_ONCE(vif_id >= MAC_INDEX_AUX, "invalid vif id: %d", vif_id)) 654 return; 655 656 if (vif->type != NL80211_IFTYPE_STATION) 657 return; 658 659 mac_stats = &data->per_mac_stats[vif_id]; 660 661 mvmvif->beacon_stats.num_beacons = 662 le32_to_cpu(mac_stats->beacon_counter); 663 mvmvif->beacon_stats.avg_signal = 664 -le32_to_cpu(mac_stats->beacon_average_energy); 665 666 /* make sure that beacon statistics don't go backwards with TCM 667 * request to clear statistics 668 */ 669 if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 670 mvmvif->beacon_stats.accu_num_beacons += 671 mvmvif->beacon_stats.num_beacons; 672 673 sig = -le32_to_cpu(mac_stats->beacon_filter_average_energy); 674 iwl_mvm_update_vif_sig(vif, sig); 675 } 676 677 static inline void 678 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) 679 { 680 struct iwl_fw_dbg_trigger_tlv *trig; 681 struct iwl_fw_dbg_trigger_stats *trig_stats; 682 u32 trig_offset, trig_thold; 683 684 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS); 685 if (!trig) 686 return; 687 688 trig_stats = (void *)trig->data; 689 690 trig_offset = le32_to_cpu(trig_stats->stop_offset); 691 trig_thold = le32_to_cpu(trig_stats->stop_threshold); 692 693 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) 694 return; 695 696 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) 697 return; 698 699 #if defined(__linux__) 700 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL); 701 #elif defined(__FreeBSD__) 702 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, ""); 703 #endif 704 } 705 706 static void iwl_mvm_stats_energy_iter(void *_data, 707 struct ieee80211_sta *sta) 708 { 709 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 710 u8 *energy = _data; 711 u32 sta_id = mvmsta->sta_id; 712 713 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT_MAX, "sta_id %d >= %d", 714 sta_id, IWL_MVM_STATION_COUNT_MAX)) 715 return; 716 717 if (energy[sta_id]) 718 mvmsta->avg_energy = energy[sta_id]; 719 720 } 721 722 static void 723 iwl_mvm_update_tcm_from_stats(struct iwl_mvm *mvm, __le32 *air_time_le, 724 __le32 *rx_bytes_le) 725 { 726 int i; 727 728 spin_lock(&mvm->tcm.lock); 729 for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) { 730 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i]; 731 u32 rx_bytes = le32_to_cpu(rx_bytes_le[i]); 732 u32 airtime = le32_to_cpu(air_time_le[i]); 733 734 mdata->rx.airtime += airtime; 735 mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes; 736 if (airtime) { 737 /* re-init every time to store rate from FW */ 738 ewma_rate_init(&mdata->uapsd_nonagg_detect.rate); 739 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, 740 rx_bytes * 8 / airtime); 741 } 742 } 743 spin_unlock(&mvm->tcm.lock); 744 } 745 746 static void 747 iwl_mvm_stats_ver_15(struct iwl_mvm *mvm, 748 struct iwl_statistics_operational_ntfy *stats) 749 { 750 struct iwl_mvm_stat_data_all_macs data = { 751 .mvm = mvm, 752 .flags = stats->flags, 753 .per_mac_stats = stats->per_mac_stats, 754 }; 755 756 ieee80211_iterate_active_interfaces(mvm->hw, 757 IEEE80211_IFACE_ITER_NORMAL, 758 iwl_mvm_stat_iterator_all_macs, 759 &data); 760 } 761 762 static void 763 iwl_mvm_stats_ver_14(struct iwl_mvm *mvm, 764 struct iwl_statistics_operational_ntfy_ver_14 *stats) 765 { 766 struct iwl_mvm_stat_data data = { 767 .mvm = mvm, 768 }; 769 770 u8 beacon_average_energy[MAC_INDEX_AUX]; 771 __le32 flags; 772 int i; 773 774 flags = stats->flags; 775 776 data.mac_id = stats->mac_id; 777 data.beacon_filter_average_energy = 778 le32_to_cpu(stats->beacon_filter_average_energy); 779 data.flags = flags; 780 data.beacon_counter = stats->beacon_counter; 781 782 for (i = 0; i < ARRAY_SIZE(beacon_average_energy); i++) 783 beacon_average_energy[i] = 784 le32_to_cpu(stats->beacon_average_energy[i]); 785 786 data.beacon_average_energy = beacon_average_energy; 787 788 ieee80211_iterate_active_interfaces(mvm->hw, 789 IEEE80211_IFACE_ITER_NORMAL, 790 iwl_mvm_stat_iterator, 791 &data); 792 } 793 794 static bool iwl_mvm_verify_stats_len(struct iwl_mvm *mvm, 795 struct iwl_rx_packet *pkt, 796 u32 expected_size) 797 { 798 struct iwl_statistics_ntfy_hdr *hdr; 799 800 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) < expected_size, 801 "received invalid statistics size (%d)!, expected_size: %d\n", 802 iwl_rx_packet_payload_len(pkt), expected_size)) 803 return false; 804 805 hdr = (void *)&pkt->data; 806 807 if (WARN_ONCE((hdr->type & IWL_STATISTICS_TYPE_MSK) != FW_STATISTICS_OPERATIONAL || 808 hdr->version != 809 iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, STATISTICS_NOTIFICATION, 0), 810 "received unsupported hdr type %d, version %d\n", 811 hdr->type, hdr->version)) 812 return false; 813 814 if (WARN_ONCE(le16_to_cpu(hdr->size) != expected_size, 815 "received invalid statistics size in header (%d)!, expected_size: %d\n", 816 le16_to_cpu(hdr->size), expected_size)) 817 return false; 818 819 return true; 820 } 821 822 static void 823 iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm *mvm, 824 struct iwl_rx_packet *pkt) 825 { 826 u8 average_energy[IWL_MVM_STATION_COUNT_MAX]; 827 __le32 air_time[MAC_INDEX_AUX]; 828 __le32 rx_bytes[MAC_INDEX_AUX]; 829 __le32 flags = 0; 830 int i; 831 u32 notif_ver = iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, 832 STATISTICS_NOTIFICATION, 0); 833 834 if (WARN_ONCE(notif_ver > 15, 835 "invalid statistics version id: %d\n", notif_ver)) 836 return; 837 838 if (notif_ver == 14) { 839 struct iwl_statistics_operational_ntfy_ver_14 *stats = 840 (void *)pkt->data; 841 842 if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats))) 843 return; 844 845 iwl_mvm_stats_ver_14(mvm, stats); 846 847 flags = stats->flags; 848 mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time); 849 mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time); 850 mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf); 851 mvm->radio_stats.on_time_scan = 852 le64_to_cpu(stats->on_time_scan); 853 854 for (i = 0; i < ARRAY_SIZE(average_energy); i++) 855 average_energy[i] = le32_to_cpu(stats->average_energy[i]); 856 857 for (i = 0; i < ARRAY_SIZE(air_time); i++) { 858 air_time[i] = stats->air_time[i]; 859 rx_bytes[i] = stats->rx_bytes[i]; 860 } 861 } 862 863 if (notif_ver == 15) { 864 struct iwl_statistics_operational_ntfy *stats = 865 (void *)pkt->data; 866 867 if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats))) 868 return; 869 870 iwl_mvm_stats_ver_15(mvm, stats); 871 872 flags = stats->flags; 873 mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time); 874 mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time); 875 mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf); 876 mvm->radio_stats.on_time_scan = 877 le64_to_cpu(stats->on_time_scan); 878 879 for (i = 0; i < ARRAY_SIZE(average_energy); i++) 880 average_energy[i] = 881 le32_to_cpu(stats->per_sta_stats[i].average_energy); 882 883 for (i = 0; i < ARRAY_SIZE(air_time); i++) { 884 air_time[i] = stats->per_mac_stats[i].air_time; 885 rx_bytes[i] = stats->per_mac_stats[i].rx_bytes; 886 } 887 } 888 889 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 890 891 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter, 892 average_energy); 893 /* 894 * Don't update in case the statistics are not cleared, since 895 * we will end up counting twice the same airtime, once in TCM 896 * request and once in statistics notification. 897 */ 898 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 899 iwl_mvm_update_tcm_from_stats(mvm, air_time, rx_bytes); 900 } 901 902 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, 903 struct iwl_rx_packet *pkt) 904 { 905 struct iwl_mvm_stat_data data = { 906 .mvm = mvm, 907 }; 908 __le32 *bytes, *air_time, flags; 909 int expected_size; 910 u8 *energy; 911 912 /* From ver 14 and up we use TLV statistics format */ 913 if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, 914 STATISTICS_NOTIFICATION, 0) >= 14) 915 return iwl_mvm_handle_rx_statistics_tlv(mvm, pkt); 916 917 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 918 if (iwl_mvm_has_new_rx_api(mvm)) 919 expected_size = sizeof(struct iwl_notif_statistics_v11); 920 else 921 expected_size = sizeof(struct iwl_notif_statistics_v10); 922 } else { 923 expected_size = sizeof(struct iwl_notif_statistics); 924 } 925 926 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size, 927 "received invalid statistics size (%d)!\n", 928 iwl_rx_packet_payload_len(pkt))) 929 return; 930 931 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 932 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data; 933 934 data.mac_id = stats->rx.general.mac_id; 935 data.beacon_filter_average_energy = 936 stats->general.common.beacon_filter_average_energy; 937 938 mvm->rx_stats_v3 = stats->rx; 939 940 mvm->radio_stats.rx_time = 941 le64_to_cpu(stats->general.common.rx_time); 942 mvm->radio_stats.tx_time = 943 le64_to_cpu(stats->general.common.tx_time); 944 mvm->radio_stats.on_time_rf = 945 le64_to_cpu(stats->general.common.on_time_rf); 946 mvm->radio_stats.on_time_scan = 947 le64_to_cpu(stats->general.common.on_time_scan); 948 949 data.beacon_counter = stats->general.beacon_counter; 950 data.beacon_average_energy = 951 stats->general.beacon_average_energy; 952 flags = stats->flag; 953 } else { 954 struct iwl_notif_statistics *stats = (void *)&pkt->data; 955 956 data.mac_id = stats->rx.general.mac_id; 957 data.beacon_filter_average_energy = 958 stats->general.common.beacon_filter_average_energy; 959 960 mvm->rx_stats = stats->rx; 961 962 mvm->radio_stats.rx_time = 963 le64_to_cpu(stats->general.common.rx_time); 964 mvm->radio_stats.tx_time = 965 le64_to_cpu(stats->general.common.tx_time); 966 mvm->radio_stats.on_time_rf = 967 le64_to_cpu(stats->general.common.on_time_rf); 968 mvm->radio_stats.on_time_scan = 969 le64_to_cpu(stats->general.common.on_time_scan); 970 971 data.beacon_counter = stats->general.beacon_counter; 972 data.beacon_average_energy = 973 stats->general.beacon_average_energy; 974 flags = stats->flag; 975 } 976 data.flags = flags; 977 978 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 979 980 ieee80211_iterate_active_interfaces(mvm->hw, 981 IEEE80211_IFACE_ITER_NORMAL, 982 iwl_mvm_stat_iterator, 983 &data); 984 985 if (!iwl_mvm_has_new_rx_api(mvm)) 986 return; 987 988 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 989 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data; 990 991 energy = (void *)&v11->load_stats.avg_energy; 992 bytes = (void *)&v11->load_stats.byte_count; 993 air_time = (void *)&v11->load_stats.air_time; 994 } else { 995 struct iwl_notif_statistics *stats = (void *)&pkt->data; 996 997 energy = (void *)&stats->load_stats.avg_energy; 998 bytes = (void *)&stats->load_stats.byte_count; 999 air_time = (void *)&stats->load_stats.air_time; 1000 } 1001 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter, 1002 energy); 1003 1004 /* 1005 * Don't update in case the statistics are not cleared, since 1006 * we will end up counting twice the same airtime, once in TCM 1007 * request and once in statistics notification. 1008 */ 1009 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 1010 iwl_mvm_update_tcm_from_stats(mvm, air_time, bytes); 1011 1012 } 1013 1014 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1015 { 1016 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); 1017 } 1018 1019 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, 1020 struct iwl_rx_cmd_buffer *rxb) 1021 { 1022 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1023 struct iwl_ba_window_status_notif *notif = (void *)pkt->data; 1024 int i; 1025 1026 BUILD_BUG_ON(ARRAY_SIZE(notif->ra_tid) != BA_WINDOW_STREAMS_MAX); 1027 BUILD_BUG_ON(ARRAY_SIZE(notif->mpdu_rx_count) != BA_WINDOW_STREAMS_MAX); 1028 BUILD_BUG_ON(ARRAY_SIZE(notif->bitmap) != BA_WINDOW_STREAMS_MAX); 1029 BUILD_BUG_ON(ARRAY_SIZE(notif->start_seq_num) != BA_WINDOW_STREAMS_MAX); 1030 1031 rcu_read_lock(); 1032 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { 1033 struct ieee80211_sta *sta; 1034 u8 sta_id, tid; 1035 u64 bitmap; 1036 u32 ssn; 1037 u16 ratid; 1038 u16 received_mpdu; 1039 1040 ratid = le16_to_cpu(notif->ra_tid[i]); 1041 /* check that this TID is valid */ 1042 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) 1043 continue; 1044 1045 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); 1046 if (received_mpdu == 0) 1047 continue; 1048 1049 tid = ratid & BA_WINDOW_STATUS_TID_MSK; 1050 /* get the station */ 1051 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) 1052 >> BA_WINDOW_STATUS_STA_ID_POS; 1053 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1054 if (IS_ERR_OR_NULL(sta)) 1055 continue; 1056 bitmap = le64_to_cpu(notif->bitmap[i]); 1057 ssn = le32_to_cpu(notif->start_seq_num[i]); 1058 1059 /* update mac80211 with the bitmap for the reordering buffer */ 1060 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, 1061 received_mpdu); 1062 } 1063 rcu_read_unlock(); 1064 } 1065