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 = (void *)hdr + hdrlen - 87 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 (!mvm->monitor_on) 193 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); 194 } 195 196 return 0; 197 } 198 199 static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm, 200 struct ieee80211_sta *sta, 201 struct ieee80211_hdr *hdr, u32 len, 202 struct iwl_rx_phy_info *phy_info, 203 u32 rate_n_flags) 204 { 205 struct iwl_mvm_sta *mvmsta; 206 struct iwl_mvm_tcm_mac *mdata; 207 int mac; 208 int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */ 209 struct iwl_mvm_vif *mvmvif; 210 /* expected throughput in 100Kbps, single stream, 20 MHz */ 211 static const u8 thresh_tpt[] = { 212 9, 18, 30, 42, 60, 78, 90, 96, 120, 135, 213 }; 214 u16 thr; 215 216 if (ieee80211_is_data_qos(hdr->frame_control)) 217 ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)]; 218 219 mvmsta = iwl_mvm_sta_from_mac80211(sta); 220 mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 221 222 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 223 schedule_delayed_work(&mvm->tcm.work, 0); 224 mdata = &mvm->tcm.data[mac]; 225 mdata->rx.pkts[ac]++; 226 227 /* count the airtime only once for each ampdu */ 228 if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) { 229 mdata->rx.last_ampdu_ref = mvm->ampdu_ref; 230 mdata->rx.airtime += le16_to_cpu(phy_info->frame_time); 231 } 232 233 if (!(rate_n_flags & (RATE_MCS_HT_MSK_V1 | RATE_MCS_VHT_MSK_V1))) 234 return; 235 236 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 237 238 if (mdata->opened_rx_ba_sessions || 239 mdata->uapsd_nonagg_detect.detected || 240 (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd && 241 !mvmvif->queue_params[IEEE80211_AC_VI].uapsd && 242 !mvmvif->queue_params[IEEE80211_AC_BE].uapsd && 243 !mvmvif->queue_params[IEEE80211_AC_BK].uapsd) || 244 mvmsta->sta_id != mvmvif->ap_sta_id) 245 return; 246 247 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 248 thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK_V1]; 249 thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK_V1) >> 250 RATE_HT_MCS_NSS_POS_V1); 251 } else { 252 if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >= 253 ARRAY_SIZE(thresh_tpt))) 254 return; 255 thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK]; 256 thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 257 RATE_VHT_MCS_NSS_POS); 258 } 259 260 thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) >> 261 RATE_MCS_CHAN_WIDTH_POS); 262 263 mdata->uapsd_nonagg_detect.rx_bytes += len; 264 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr); 265 } 266 267 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 268 struct sk_buff *skb, 269 u32 status) 270 { 271 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 272 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 273 274 if (mvmvif->features & NETIF_F_RXCSUM && 275 status & RX_MPDU_RES_STATUS_CSUM_DONE && 276 status & RX_MPDU_RES_STATUS_CSUM_OK) 277 skb->ip_summed = CHECKSUM_UNNECESSARY; 278 } 279 280 /* 281 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 282 * 283 * Handles the actual data of the Rx packet from the fw 284 */ 285 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, 286 struct iwl_rx_cmd_buffer *rxb) 287 { 288 struct ieee80211_hdr *hdr; 289 struct ieee80211_rx_status *rx_status; 290 struct iwl_rx_packet *pkt = rxb_addr(rxb); 291 struct iwl_rx_phy_info *phy_info; 292 struct iwl_rx_mpdu_res_start *rx_res; 293 struct ieee80211_sta *sta = NULL; 294 struct sk_buff *skb; 295 u32 len, pkt_len = iwl_rx_packet_payload_len(pkt); 296 u32 rate_n_flags; 297 u32 rx_pkt_status; 298 u8 crypt_len = 0; 299 300 if (unlikely(pkt_len < sizeof(*rx_res))) { 301 IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n"); 302 return; 303 } 304 305 phy_info = &mvm->last_phy_info; 306 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 307 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 308 len = le16_to_cpu(rx_res->byte_count); 309 310 if (unlikely(len + sizeof(*rx_res) + sizeof(__le32) > pkt_len)) { 311 IWL_DEBUG_DROP(mvm, "FW lied about packet len\n"); 312 return; 313 } 314 315 rx_pkt_status = get_unaligned_le32((__le32 *) 316 (pkt->data + sizeof(*rx_res) + len)); 317 318 /* Dont use dev_alloc_skb(), we'll have enough headroom once 319 * ieee80211_hdr pulled. 320 */ 321 skb = alloc_skb(128, GFP_ATOMIC); 322 if (!skb) { 323 IWL_ERR(mvm, "alloc_skb failed\n"); 324 return; 325 } 326 327 rx_status = IEEE80211_SKB_RXCB(skb); 328 329 /* 330 * drop the packet if it has failed being decrypted by HW 331 */ 332 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, 333 &crypt_len)) { 334 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 335 rx_pkt_status); 336 kfree_skb(skb); 337 return; 338 } 339 340 /* 341 * Keep packets with CRC errors (and with overrun) for monitor mode 342 * (otherwise the firmware discards them) but mark them as bad. 343 */ 344 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 345 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 346 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 347 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 348 } 349 350 /* This will be used in several places later */ 351 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 352 353 /* rx_status carries information about the packet to mac80211 */ 354 rx_status->mactime = le64_to_cpu(phy_info->timestamp); 355 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); 356 rx_status->band = 357 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 358 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 359 rx_status->freq = 360 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 361 rx_status->band); 362 363 /* TSF as indicated by the firmware is at INA time */ 364 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 365 366 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); 367 368 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, 369 (unsigned long long)rx_status->mactime); 370 371 rcu_read_lock(); 372 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { 373 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; 374 375 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; 376 377 if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) { 378 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 379 if (IS_ERR(sta)) 380 sta = NULL; 381 } 382 } else if (!is_multicast_ether_addr(hdr->addr2)) { 383 /* This is fine since we prevent two stations with the same 384 * address from being added. 385 */ 386 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 387 } 388 389 if (sta) { 390 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 391 struct ieee80211_vif *tx_blocked_vif = 392 rcu_dereference(mvm->csa_tx_blocked_vif); 393 struct iwl_fw_dbg_trigger_tlv *trig; 394 struct ieee80211_vif *vif = mvmsta->vif; 395 396 /* We have tx blocked stations (with CS bit). If we heard 397 * frames from a blocked station on a new channel we can 398 * TX to it again. 399 */ 400 if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) { 401 struct iwl_mvm_vif *mvmvif = 402 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 403 404 if (mvmvif->csa_target_freq == rx_status->freq) 405 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 406 false); 407 } 408 409 rs_update_last_rssi(mvm, mvmsta, rx_status); 410 411 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 412 ieee80211_vif_to_wdev(vif), 413 FW_DBG_TRIGGER_RSSI); 414 415 if (trig && ieee80211_is_beacon(hdr->frame_control)) { 416 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 417 s32 rssi; 418 419 rssi_trig = (void *)trig->data; 420 rssi = le32_to_cpu(rssi_trig->rssi); 421 422 if (rx_status->signal < rssi) 423 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 424 NULL); 425 } 426 427 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 428 !is_multicast_ether_addr(hdr->addr1) && 429 ieee80211_is_data(hdr->frame_control)) 430 iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info, 431 rate_n_flags); 432 433 if (ieee80211_is_data(hdr->frame_control)) 434 iwl_mvm_rx_csum(sta, skb, rx_pkt_status); 435 } 436 rcu_read_unlock(); 437 438 /* set the preamble flag if appropriate */ 439 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 440 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 441 442 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 443 /* 444 * We know which subframes of an A-MPDU belong 445 * together since we get a single PHY response 446 * from the firmware for all of them 447 */ 448 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 449 rx_status->ampdu_reference = mvm->ampdu_ref; 450 } 451 452 /* Set up the HT phy flags */ 453 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) { 454 case RATE_MCS_CHAN_WIDTH_20: 455 break; 456 case RATE_MCS_CHAN_WIDTH_40: 457 rx_status->bw = RATE_INFO_BW_40; 458 break; 459 case RATE_MCS_CHAN_WIDTH_80: 460 rx_status->bw = RATE_INFO_BW_80; 461 break; 462 case RATE_MCS_CHAN_WIDTH_160: 463 rx_status->bw = RATE_INFO_BW_160; 464 break; 465 } 466 if (!(rate_n_flags & RATE_MCS_CCK_MSK_V1) && 467 rate_n_flags & RATE_MCS_SGI_MSK_V1) 468 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 469 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 470 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 471 if (rate_n_flags & RATE_MCS_LDPC_MSK_V1) 472 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 473 if (rate_n_flags & RATE_MCS_HT_MSK_V1) { 474 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 475 RATE_MCS_STBC_POS; 476 rx_status->encoding = RX_ENC_HT; 477 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1; 478 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 479 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) { 480 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 481 RATE_MCS_STBC_POS; 482 rx_status->nss = 483 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 484 RATE_VHT_MCS_NSS_POS) + 1; 485 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 486 rx_status->encoding = RX_ENC_VHT; 487 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 488 if (rate_n_flags & RATE_MCS_BF_MSK) 489 rx_status->enc_flags |= RX_ENC_FLAG_BF; 490 } else { 491 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 492 rx_status->band); 493 494 if (WARN(rate < 0 || rate > 0xFF, 495 "Invalid rate flags 0x%x, band %d,\n", 496 rate_n_flags, rx_status->band)) { 497 kfree_skb(skb); 498 return; 499 } 500 rx_status->rate_idx = rate; 501 } 502 503 #ifdef CONFIG_IWLWIFI_DEBUGFS 504 iwl_mvm_update_frame_stats(mvm, rate_n_flags, 505 rx_status->flag & RX_FLAG_AMPDU_DETAILS); 506 #endif 507 508 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 509 ieee80211_is_probe_resp(hdr->frame_control)) && 510 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) 511 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 512 513 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 514 ieee80211_is_probe_resp(hdr->frame_control))) 515 rx_status->boottime_ns = ktime_get_boottime_ns(); 516 517 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, 518 crypt_len, rxb); 519 } 520 521 struct iwl_mvm_stat_data { 522 struct iwl_mvm *mvm; 523 __le32 flags; 524 __le32 mac_id; 525 u8 beacon_filter_average_energy; 526 __le32 *beacon_counter; 527 u8 *beacon_average_energy; 528 }; 529 530 struct iwl_mvm_stat_data_all_macs { 531 struct iwl_mvm *mvm; 532 __le32 flags; 533 struct iwl_statistics_ntfy_per_mac *per_mac_stats; 534 }; 535 536 static void iwl_mvm_update_vif_sig(struct ieee80211_vif *vif, int sig) 537 { 538 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 539 struct iwl_mvm *mvm = mvmvif->mvm; 540 int thold = vif->bss_conf.cqm_rssi_thold; 541 int hyst = vif->bss_conf.cqm_rssi_hyst; 542 int last_event; 543 544 if (sig == 0) { 545 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); 546 return; 547 } 548 549 mvmvif->bf_data.ave_beacon_signal = sig; 550 551 /* BT Coex */ 552 if (mvmvif->bf_data.bt_coex_min_thold != 553 mvmvif->bf_data.bt_coex_max_thold) { 554 last_event = mvmvif->bf_data.last_bt_coex_event; 555 if (sig > mvmvif->bf_data.bt_coex_max_thold && 556 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 557 last_event == 0)) { 558 mvmvif->bf_data.last_bt_coex_event = sig; 559 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 560 sig); 561 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 562 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 563 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 564 last_event == 0)) { 565 mvmvif->bf_data.last_bt_coex_event = sig; 566 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 567 sig); 568 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 569 } 570 } 571 572 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 573 return; 574 575 /* CQM Notification */ 576 last_event = mvmvif->bf_data.last_cqm_event; 577 if (thold && sig < thold && (last_event == 0 || 578 sig < last_event - hyst)) { 579 mvmvif->bf_data.last_cqm_event = sig; 580 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 581 sig); 582 ieee80211_cqm_rssi_notify( 583 vif, 584 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 585 sig, 586 GFP_KERNEL); 587 } else if (sig > thold && 588 (last_event == 0 || sig > last_event + hyst)) { 589 mvmvif->bf_data.last_cqm_event = sig; 590 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 591 sig); 592 ieee80211_cqm_rssi_notify( 593 vif, 594 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 595 sig, 596 GFP_KERNEL); 597 } 598 } 599 600 static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 601 struct ieee80211_vif *vif) 602 { 603 struct iwl_mvm_stat_data *data = _data; 604 int sig = -data->beacon_filter_average_energy; 605 u16 id = le32_to_cpu(data->mac_id); 606 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 607 u16 vif_id = mvmvif->id; 608 609 /* This doesn't need the MAC ID check since it's not taking the 610 * data copied into the "data" struct, but rather the data from 611 * the notification directly. 612 */ 613 mvmvif->beacon_stats.num_beacons = 614 le32_to_cpu(data->beacon_counter[vif_id]); 615 mvmvif->beacon_stats.avg_signal = 616 -data->beacon_average_energy[vif_id]; 617 618 if (mvmvif->id != id) 619 return; 620 621 if (vif->type != NL80211_IFTYPE_STATION) 622 return; 623 624 /* make sure that beacon statistics don't go backwards with TCM 625 * request to clear statistics 626 */ 627 if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 628 mvmvif->beacon_stats.accu_num_beacons += 629 mvmvif->beacon_stats.num_beacons; 630 631 iwl_mvm_update_vif_sig(vif, sig); 632 } 633 634 static void iwl_mvm_stat_iterator_all_macs(void *_data, u8 *mac, 635 struct ieee80211_vif *vif) 636 { 637 struct iwl_mvm_stat_data_all_macs *data = _data; 638 struct iwl_statistics_ntfy_per_mac *mac_stats; 639 int sig; 640 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 641 u16 vif_id = mvmvif->id; 642 643 if (WARN_ONCE(vif_id > MAC_INDEX_AUX, "invalid vif id: %d", vif_id)) 644 return; 645 646 if (vif->type != NL80211_IFTYPE_STATION) 647 return; 648 649 mac_stats = &data->per_mac_stats[vif_id]; 650 651 mvmvif->beacon_stats.num_beacons = 652 le32_to_cpu(mac_stats->beacon_counter); 653 mvmvif->beacon_stats.avg_signal = 654 -le32_to_cpu(mac_stats->beacon_average_energy); 655 656 /* make sure that beacon statistics don't go backwards with TCM 657 * request to clear statistics 658 */ 659 if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 660 mvmvif->beacon_stats.accu_num_beacons += 661 mvmvif->beacon_stats.num_beacons; 662 663 sig = -le32_to_cpu(mac_stats->beacon_filter_average_energy); 664 iwl_mvm_update_vif_sig(vif, sig); 665 } 666 667 static inline void 668 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) 669 { 670 struct iwl_fw_dbg_trigger_tlv *trig; 671 struct iwl_fw_dbg_trigger_stats *trig_stats; 672 u32 trig_offset, trig_thold; 673 674 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS); 675 if (!trig) 676 return; 677 678 trig_stats = (void *)trig->data; 679 680 trig_offset = le32_to_cpu(trig_stats->stop_offset); 681 trig_thold = le32_to_cpu(trig_stats->stop_threshold); 682 683 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) 684 return; 685 686 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) 687 return; 688 689 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL); 690 } 691 692 static void iwl_mvm_stats_energy_iter(void *_data, 693 struct ieee80211_sta *sta) 694 { 695 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 696 u8 *energy = _data; 697 u32 sta_id = mvmsta->sta_id; 698 699 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT_MAX, "sta_id %d >= %d", 700 sta_id, IWL_MVM_STATION_COUNT_MAX)) 701 return; 702 703 if (energy[sta_id]) 704 mvmsta->avg_energy = energy[sta_id]; 705 706 } 707 708 static void 709 iwl_mvm_update_tcm_from_stats(struct iwl_mvm *mvm, __le32 *air_time_le, 710 __le32 *rx_bytes_le) 711 { 712 int i; 713 714 spin_lock(&mvm->tcm.lock); 715 for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) { 716 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i]; 717 u32 rx_bytes = le32_to_cpu(rx_bytes_le[i]); 718 u32 airtime = le32_to_cpu(air_time_le[i]); 719 720 mdata->rx.airtime += airtime; 721 mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes; 722 if (airtime) { 723 /* re-init every time to store rate from FW */ 724 ewma_rate_init(&mdata->uapsd_nonagg_detect.rate); 725 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, 726 rx_bytes * 8 / airtime); 727 } 728 } 729 spin_unlock(&mvm->tcm.lock); 730 } 731 732 static void 733 iwl_mvm_stats_ver_15(struct iwl_mvm *mvm, 734 struct iwl_statistics_operational_ntfy *stats) 735 { 736 struct iwl_mvm_stat_data_all_macs data = { 737 .mvm = mvm, 738 .flags = stats->flags, 739 .per_mac_stats = stats->per_mac_stats, 740 }; 741 742 ieee80211_iterate_active_interfaces(mvm->hw, 743 IEEE80211_IFACE_ITER_NORMAL, 744 iwl_mvm_stat_iterator_all_macs, 745 &data); 746 } 747 748 static void 749 iwl_mvm_stats_ver_14(struct iwl_mvm *mvm, 750 struct iwl_statistics_operational_ntfy_ver_14 *stats) 751 { 752 struct iwl_mvm_stat_data data = { 753 .mvm = mvm, 754 }; 755 756 u8 beacon_average_energy[MAC_INDEX_AUX]; 757 __le32 flags; 758 int i; 759 760 flags = stats->flags; 761 762 data.mac_id = stats->mac_id; 763 data.beacon_filter_average_energy = 764 le32_to_cpu(stats->beacon_filter_average_energy); 765 data.flags = flags; 766 data.beacon_counter = stats->beacon_counter; 767 768 for (i = 0; i < ARRAY_SIZE(beacon_average_energy); i++) 769 beacon_average_energy[i] = 770 le32_to_cpu(stats->beacon_average_energy[i]); 771 772 data.beacon_average_energy = beacon_average_energy; 773 774 ieee80211_iterate_active_interfaces(mvm->hw, 775 IEEE80211_IFACE_ITER_NORMAL, 776 iwl_mvm_stat_iterator, 777 &data); 778 } 779 780 static bool iwl_mvm_verify_stats_len(struct iwl_mvm *mvm, 781 struct iwl_rx_packet *pkt, 782 u32 expected_size) 783 { 784 struct iwl_statistics_ntfy_hdr *hdr; 785 786 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) < expected_size, 787 "received invalid statistics size (%d)!, expected_size: %d\n", 788 iwl_rx_packet_payload_len(pkt), expected_size)) 789 return false; 790 791 hdr = (void *)&pkt->data; 792 793 if (WARN_ONCE((hdr->type & IWL_STATISTICS_TYPE_MSK) != FW_STATISTICS_OPERATIONAL || 794 hdr->version != 795 iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, STATISTICS_NOTIFICATION, 0), 796 "received unsupported hdr type %d, version %d\n", 797 hdr->type, hdr->version)) 798 return false; 799 800 if (WARN_ONCE(le16_to_cpu(hdr->size) != expected_size, 801 "received invalid statistics size in header (%d)!, expected_size: %d\n", 802 le16_to_cpu(hdr->size), expected_size)) 803 return false; 804 805 return true; 806 } 807 808 static void 809 iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm *mvm, 810 struct iwl_rx_packet *pkt) 811 { 812 u8 average_energy[IWL_MVM_STATION_COUNT_MAX]; 813 __le32 air_time[MAC_INDEX_AUX]; 814 __le32 rx_bytes[MAC_INDEX_AUX]; 815 __le32 flags = 0; 816 int i; 817 u32 notif_ver = iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, 818 STATISTICS_NOTIFICATION, 0); 819 820 if (WARN_ONCE(notif_ver > 15, 821 "invalid statistics version id: %d\n", notif_ver)) 822 return; 823 824 if (notif_ver == 14) { 825 struct iwl_statistics_operational_ntfy_ver_14 *stats = 826 (void *)pkt->data; 827 828 if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats))) 829 return; 830 831 iwl_mvm_stats_ver_14(mvm, stats); 832 833 flags = stats->flags; 834 mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time); 835 mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time); 836 mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf); 837 mvm->radio_stats.on_time_scan = 838 le64_to_cpu(stats->on_time_scan); 839 840 for (i = 0; i < ARRAY_SIZE(average_energy); i++) 841 average_energy[i] = le32_to_cpu(stats->average_energy[i]); 842 843 for (i = 0; i < ARRAY_SIZE(air_time); i++) { 844 air_time[i] = stats->air_time[i]; 845 rx_bytes[i] = stats->rx_bytes[i]; 846 } 847 } 848 849 if (notif_ver == 15) { 850 struct iwl_statistics_operational_ntfy *stats = 851 (void *)pkt->data; 852 853 if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats))) 854 return; 855 856 iwl_mvm_stats_ver_15(mvm, stats); 857 858 flags = stats->flags; 859 mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time); 860 mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time); 861 mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf); 862 mvm->radio_stats.on_time_scan = 863 le64_to_cpu(stats->on_time_scan); 864 865 for (i = 0; i < ARRAY_SIZE(average_energy); i++) 866 average_energy[i] = 867 le32_to_cpu(stats->per_sta_stats[i].average_energy); 868 869 for (i = 0; i < ARRAY_SIZE(air_time); i++) { 870 air_time[i] = stats->per_mac_stats[i].air_time; 871 rx_bytes[i] = stats->per_mac_stats[i].rx_bytes; 872 } 873 } 874 875 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 876 877 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter, 878 average_energy); 879 /* 880 * Don't update in case the statistics are not cleared, since 881 * we will end up counting twice the same airtime, once in TCM 882 * request and once in statistics notification. 883 */ 884 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 885 iwl_mvm_update_tcm_from_stats(mvm, air_time, rx_bytes); 886 } 887 888 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, 889 struct iwl_rx_packet *pkt) 890 { 891 struct iwl_mvm_stat_data data = { 892 .mvm = mvm, 893 }; 894 __le32 *bytes, *air_time, flags; 895 int expected_size; 896 u8 *energy; 897 898 /* From ver 14 and up we use TLV statistics format */ 899 if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, 900 STATISTICS_NOTIFICATION, 0) >= 14) 901 return iwl_mvm_handle_rx_statistics_tlv(mvm, pkt); 902 903 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 904 if (iwl_mvm_has_new_rx_api(mvm)) 905 expected_size = sizeof(struct iwl_notif_statistics_v11); 906 else 907 expected_size = sizeof(struct iwl_notif_statistics_v10); 908 } else { 909 expected_size = sizeof(struct iwl_notif_statistics); 910 } 911 912 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size, 913 "received invalid statistics size (%d)!\n", 914 iwl_rx_packet_payload_len(pkt))) 915 return; 916 917 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 918 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data; 919 920 data.mac_id = stats->rx.general.mac_id; 921 data.beacon_filter_average_energy = 922 stats->general.common.beacon_filter_average_energy; 923 924 mvm->rx_stats_v3 = stats->rx; 925 926 mvm->radio_stats.rx_time = 927 le64_to_cpu(stats->general.common.rx_time); 928 mvm->radio_stats.tx_time = 929 le64_to_cpu(stats->general.common.tx_time); 930 mvm->radio_stats.on_time_rf = 931 le64_to_cpu(stats->general.common.on_time_rf); 932 mvm->radio_stats.on_time_scan = 933 le64_to_cpu(stats->general.common.on_time_scan); 934 935 data.beacon_counter = stats->general.beacon_counter; 936 data.beacon_average_energy = 937 stats->general.beacon_average_energy; 938 flags = stats->flag; 939 } else { 940 struct iwl_notif_statistics *stats = (void *)&pkt->data; 941 942 data.mac_id = stats->rx.general.mac_id; 943 data.beacon_filter_average_energy = 944 stats->general.common.beacon_filter_average_energy; 945 946 mvm->rx_stats = stats->rx; 947 948 mvm->radio_stats.rx_time = 949 le64_to_cpu(stats->general.common.rx_time); 950 mvm->radio_stats.tx_time = 951 le64_to_cpu(stats->general.common.tx_time); 952 mvm->radio_stats.on_time_rf = 953 le64_to_cpu(stats->general.common.on_time_rf); 954 mvm->radio_stats.on_time_scan = 955 le64_to_cpu(stats->general.common.on_time_scan); 956 957 data.beacon_counter = stats->general.beacon_counter; 958 data.beacon_average_energy = 959 stats->general.beacon_average_energy; 960 flags = stats->flag; 961 } 962 data.flags = flags; 963 964 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 965 966 ieee80211_iterate_active_interfaces(mvm->hw, 967 IEEE80211_IFACE_ITER_NORMAL, 968 iwl_mvm_stat_iterator, 969 &data); 970 971 if (!iwl_mvm_has_new_rx_api(mvm)) 972 return; 973 974 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 975 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data; 976 977 energy = (void *)&v11->load_stats.avg_energy; 978 bytes = (void *)&v11->load_stats.byte_count; 979 air_time = (void *)&v11->load_stats.air_time; 980 } else { 981 struct iwl_notif_statistics *stats = (void *)&pkt->data; 982 983 energy = (void *)&stats->load_stats.avg_energy; 984 bytes = (void *)&stats->load_stats.byte_count; 985 air_time = (void *)&stats->load_stats.air_time; 986 } 987 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter, 988 energy); 989 990 /* 991 * Don't update in case the statistics are not cleared, since 992 * we will end up counting twice the same airtime, once in TCM 993 * request and once in statistics notification. 994 */ 995 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 996 iwl_mvm_update_tcm_from_stats(mvm, air_time, bytes); 997 998 } 999 1000 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 1001 { 1002 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); 1003 } 1004 1005 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, 1006 struct iwl_rx_cmd_buffer *rxb) 1007 { 1008 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1009 struct iwl_ba_window_status_notif *notif = (void *)pkt->data; 1010 int i; 1011 1012 BUILD_BUG_ON(ARRAY_SIZE(notif->ra_tid) != BA_WINDOW_STREAMS_MAX); 1013 BUILD_BUG_ON(ARRAY_SIZE(notif->mpdu_rx_count) != BA_WINDOW_STREAMS_MAX); 1014 BUILD_BUG_ON(ARRAY_SIZE(notif->bitmap) != BA_WINDOW_STREAMS_MAX); 1015 BUILD_BUG_ON(ARRAY_SIZE(notif->start_seq_num) != BA_WINDOW_STREAMS_MAX); 1016 1017 rcu_read_lock(); 1018 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { 1019 struct ieee80211_sta *sta; 1020 u8 sta_id, tid; 1021 u64 bitmap; 1022 u32 ssn; 1023 u16 ratid; 1024 u16 received_mpdu; 1025 1026 ratid = le16_to_cpu(notif->ra_tid[i]); 1027 /* check that this TID is valid */ 1028 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) 1029 continue; 1030 1031 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); 1032 if (received_mpdu == 0) 1033 continue; 1034 1035 tid = ratid & BA_WINDOW_STATUS_TID_MSK; 1036 /* get the station */ 1037 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) 1038 >> BA_WINDOW_STATUS_STA_ID_POS; 1039 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 1040 if (IS_ERR_OR_NULL(sta)) 1041 continue; 1042 bitmap = le64_to_cpu(notif->bitmap[i]); 1043 ssn = le32_to_cpu(notif->start_seq_num[i]); 1044 1045 /* update mac80211 with the bitmap for the reordering buffer */ 1046 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, 1047 received_mpdu); 1048 } 1049 rcu_read_unlock(); 1050 } 1051