1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2020 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, energy_c, 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 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> 118 IWL_RX_INFO_ENERGY_ANT_C_POS; 119 energy_c = energy_c ? -energy_c : S8_MIN; 120 max_energy = max(energy_a, energy_b); 121 max_energy = max(max_energy, energy_c); 122 123 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n", 124 energy_a, energy_b, energy_c, max_energy); 125 126 rx_status->signal = max_energy; 127 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) & 128 RX_RES_PHY_FLAGS_ANTENNA) 129 >> RX_RES_PHY_FLAGS_ANTENNA_POS; 130 rx_status->chain_signal[0] = energy_a; 131 rx_status->chain_signal[1] = energy_b; 132 rx_status->chain_signal[2] = energy_c; 133 } 134 135 /* 136 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format 137 * @mvm: the mvm object 138 * @hdr: 80211 header 139 * @stats: status in mac80211's format 140 * @rx_pkt_status: status coming from fw 141 * 142 * returns non 0 value if the packet should be dropped 143 */ 144 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, 145 struct ieee80211_hdr *hdr, 146 struct ieee80211_rx_status *stats, 147 u32 rx_pkt_status, 148 u8 *crypt_len) 149 { 150 if (!ieee80211_has_protected(hdr->frame_control) || 151 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 152 RX_MPDU_RES_STATUS_SEC_NO_ENC) 153 return 0; 154 155 /* packet was encrypted with unknown alg */ 156 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 157 RX_MPDU_RES_STATUS_SEC_ENC_ERR) 158 return 0; 159 160 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { 161 case RX_MPDU_RES_STATUS_SEC_CCM_ENC: 162 /* alg is CCM: check MIC only */ 163 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 164 return -1; 165 166 stats->flag |= RX_FLAG_DECRYPTED; 167 *crypt_len = IEEE80211_CCMP_HDR_LEN; 168 return 0; 169 170 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: 171 /* Don't drop the frame and decrypt it in SW */ 172 if (!fw_has_api(&mvm->fw->ucode_capa, 173 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 174 !(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) 175 return 0; 176 *crypt_len = IEEE80211_TKIP_IV_LEN; 177 fallthrough; 178 179 case RX_MPDU_RES_STATUS_SEC_WEP_ENC: 180 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) 181 return -1; 182 183 stats->flag |= RX_FLAG_DECRYPTED; 184 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 185 RX_MPDU_RES_STATUS_SEC_WEP_ENC) 186 *crypt_len = IEEE80211_WEP_IV_LEN; 187 return 0; 188 189 case RX_MPDU_RES_STATUS_SEC_EXT_ENC: 190 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 191 return -1; 192 stats->flag |= RX_FLAG_DECRYPTED; 193 return 0; 194 195 default: 196 /* Expected in monitor (not having the keys) */ 197 if (!mvm->monitor_on) 198 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); 199 } 200 201 return 0; 202 } 203 204 static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm, 205 struct ieee80211_sta *sta, 206 struct ieee80211_hdr *hdr, u32 len, 207 struct iwl_rx_phy_info *phy_info, 208 u32 rate_n_flags) 209 { 210 struct iwl_mvm_sta *mvmsta; 211 struct iwl_mvm_tcm_mac *mdata; 212 int mac; 213 int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */ 214 struct iwl_mvm_vif *mvmvif; 215 /* expected throughput in 100Kbps, single stream, 20 MHz */ 216 static const u8 thresh_tpt[] = { 217 9, 18, 30, 42, 60, 78, 90, 96, 120, 135, 218 }; 219 u16 thr; 220 221 if (ieee80211_is_data_qos(hdr->frame_control)) 222 ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)]; 223 224 mvmsta = iwl_mvm_sta_from_mac80211(sta); 225 mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 226 227 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 228 schedule_delayed_work(&mvm->tcm.work, 0); 229 mdata = &mvm->tcm.data[mac]; 230 mdata->rx.pkts[ac]++; 231 232 /* count the airtime only once for each ampdu */ 233 if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) { 234 mdata->rx.last_ampdu_ref = mvm->ampdu_ref; 235 mdata->rx.airtime += le16_to_cpu(phy_info->frame_time); 236 } 237 238 if (!(rate_n_flags & (RATE_MCS_HT_MSK | RATE_MCS_VHT_MSK))) 239 return; 240 241 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 242 243 if (mdata->opened_rx_ba_sessions || 244 mdata->uapsd_nonagg_detect.detected || 245 (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd && 246 !mvmvif->queue_params[IEEE80211_AC_VI].uapsd && 247 !mvmvif->queue_params[IEEE80211_AC_BE].uapsd && 248 !mvmvif->queue_params[IEEE80211_AC_BK].uapsd) || 249 mvmsta->sta_id != mvmvif->ap_sta_id) 250 return; 251 252 if (rate_n_flags & RATE_MCS_HT_MSK) { 253 thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK]; 254 thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK) >> 255 RATE_HT_MCS_NSS_POS); 256 } else { 257 if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >= 258 ARRAY_SIZE(thresh_tpt))) 259 return; 260 thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK]; 261 thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 262 RATE_VHT_MCS_NSS_POS); 263 } 264 265 thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) >> 266 RATE_MCS_CHAN_WIDTH_POS); 267 268 mdata->uapsd_nonagg_detect.rx_bytes += len; 269 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr); 270 } 271 272 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 273 struct sk_buff *skb, 274 u32 status) 275 { 276 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 277 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 278 279 if (mvmvif->features & NETIF_F_RXCSUM && 280 status & RX_MPDU_RES_STATUS_CSUM_DONE && 281 status & RX_MPDU_RES_STATUS_CSUM_OK) 282 skb->ip_summed = CHECKSUM_UNNECESSARY; 283 } 284 285 /* 286 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 287 * 288 * Handles the actual data of the Rx packet from the fw 289 */ 290 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, 291 struct iwl_rx_cmd_buffer *rxb) 292 { 293 struct ieee80211_hdr *hdr; 294 struct ieee80211_rx_status *rx_status; 295 struct iwl_rx_packet *pkt = rxb_addr(rxb); 296 struct iwl_rx_phy_info *phy_info; 297 struct iwl_rx_mpdu_res_start *rx_res; 298 struct ieee80211_sta *sta = NULL; 299 struct sk_buff *skb; 300 u32 len, pkt_len = iwl_rx_packet_payload_len(pkt); 301 u32 rate_n_flags; 302 u32 rx_pkt_status; 303 u8 crypt_len = 0; 304 305 if (unlikely(pkt_len < sizeof(*rx_res))) { 306 IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n"); 307 return; 308 } 309 310 phy_info = &mvm->last_phy_info; 311 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 312 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 313 len = le16_to_cpu(rx_res->byte_count); 314 315 if (unlikely(len + sizeof(*rx_res) + sizeof(__le32) > pkt_len)) { 316 IWL_DEBUG_DROP(mvm, "FW lied about packet len\n"); 317 return; 318 } 319 320 rx_pkt_status = get_unaligned_le32((__le32 *) 321 (pkt->data + sizeof(*rx_res) + len)); 322 323 /* Dont use dev_alloc_skb(), we'll have enough headroom once 324 * ieee80211_hdr pulled. 325 */ 326 skb = alloc_skb(128, GFP_ATOMIC); 327 if (!skb) { 328 IWL_ERR(mvm, "alloc_skb failed\n"); 329 return; 330 } 331 332 rx_status = IEEE80211_SKB_RXCB(skb); 333 334 /* 335 * drop the packet if it has failed being decrypted by HW 336 */ 337 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, 338 &crypt_len)) { 339 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 340 rx_pkt_status); 341 kfree_skb(skb); 342 return; 343 } 344 345 /* 346 * Keep packets with CRC errors (and with overrun) for monitor mode 347 * (otherwise the firmware discards them) but mark them as bad. 348 */ 349 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 350 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 351 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 352 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 353 } 354 355 /* This will be used in several places later */ 356 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 357 358 /* rx_status carries information about the packet to mac80211 */ 359 rx_status->mactime = le64_to_cpu(phy_info->timestamp); 360 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); 361 rx_status->band = 362 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 363 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 364 rx_status->freq = 365 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 366 rx_status->band); 367 368 /* TSF as indicated by the firmware is at INA time */ 369 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 370 371 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); 372 373 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, 374 (unsigned long long)rx_status->mactime); 375 376 rcu_read_lock(); 377 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { 378 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; 379 380 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; 381 382 if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) { 383 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 384 if (IS_ERR(sta)) 385 sta = NULL; 386 } 387 } else if (!is_multicast_ether_addr(hdr->addr2)) { 388 /* This is fine since we prevent two stations with the same 389 * address from being added. 390 */ 391 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 392 } 393 394 if (sta) { 395 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 396 struct ieee80211_vif *tx_blocked_vif = 397 rcu_dereference(mvm->csa_tx_blocked_vif); 398 struct iwl_fw_dbg_trigger_tlv *trig; 399 struct ieee80211_vif *vif = mvmsta->vif; 400 401 /* We have tx blocked stations (with CS bit). If we heard 402 * frames from a blocked station on a new channel we can 403 * TX to it again. 404 */ 405 if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) { 406 struct iwl_mvm_vif *mvmvif = 407 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 408 409 if (mvmvif->csa_target_freq == rx_status->freq) 410 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 411 false); 412 } 413 414 rs_update_last_rssi(mvm, mvmsta, rx_status); 415 416 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 417 ieee80211_vif_to_wdev(vif), 418 FW_DBG_TRIGGER_RSSI); 419 420 if (trig && ieee80211_is_beacon(hdr->frame_control)) { 421 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 422 s32 rssi; 423 424 rssi_trig = (void *)trig->data; 425 rssi = le32_to_cpu(rssi_trig->rssi); 426 427 if (rx_status->signal < rssi) 428 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 429 NULL); 430 } 431 432 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 433 !is_multicast_ether_addr(hdr->addr1) && 434 ieee80211_is_data(hdr->frame_control)) 435 iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info, 436 rate_n_flags); 437 438 if (ieee80211_is_data(hdr->frame_control)) 439 iwl_mvm_rx_csum(sta, skb, rx_pkt_status); 440 } 441 rcu_read_unlock(); 442 443 /* set the preamble flag if appropriate */ 444 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 445 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 446 447 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 448 /* 449 * We know which subframes of an A-MPDU belong 450 * together since we get a single PHY response 451 * from the firmware for all of them 452 */ 453 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 454 rx_status->ampdu_reference = mvm->ampdu_ref; 455 } 456 457 /* Set up the HT phy flags */ 458 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 459 case RATE_MCS_CHAN_WIDTH_20: 460 break; 461 case RATE_MCS_CHAN_WIDTH_40: 462 rx_status->bw = RATE_INFO_BW_40; 463 break; 464 case RATE_MCS_CHAN_WIDTH_80: 465 rx_status->bw = RATE_INFO_BW_80; 466 break; 467 case RATE_MCS_CHAN_WIDTH_160: 468 rx_status->bw = RATE_INFO_BW_160; 469 break; 470 } 471 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 472 rate_n_flags & RATE_MCS_SGI_MSK) 473 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 474 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 475 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 476 if (rate_n_flags & RATE_MCS_LDPC_MSK) 477 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 478 if (rate_n_flags & RATE_MCS_HT_MSK) { 479 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 480 RATE_MCS_STBC_POS; 481 rx_status->encoding = RX_ENC_HT; 482 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 483 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 484 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 485 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 486 RATE_MCS_STBC_POS; 487 rx_status->nss = 488 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 489 RATE_VHT_MCS_NSS_POS) + 1; 490 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 491 rx_status->encoding = RX_ENC_VHT; 492 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 493 if (rate_n_flags & RATE_MCS_BF_MSK) 494 rx_status->enc_flags |= RX_ENC_FLAG_BF; 495 } else { 496 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 497 rx_status->band); 498 499 if (WARN(rate < 0 || rate > 0xFF, 500 "Invalid rate flags 0x%x, band %d,\n", 501 rate_n_flags, rx_status->band)) { 502 kfree_skb(skb); 503 return; 504 } 505 rx_status->rate_idx = rate; 506 } 507 508 #ifdef CONFIG_IWLWIFI_DEBUGFS 509 iwl_mvm_update_frame_stats(mvm, rate_n_flags, 510 rx_status->flag & RX_FLAG_AMPDU_DETAILS); 511 #endif 512 513 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 514 ieee80211_is_probe_resp(hdr->frame_control)) && 515 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) 516 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 517 518 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 519 ieee80211_is_probe_resp(hdr->frame_control))) 520 rx_status->boottime_ns = ktime_get_boottime_ns(); 521 522 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, 523 crypt_len, rxb); 524 } 525 526 struct iwl_mvm_stat_data { 527 struct iwl_mvm *mvm; 528 __le32 flags; 529 __le32 mac_id; 530 u8 beacon_filter_average_energy; 531 __le32 *beacon_counter; 532 u8 *beacon_average_energy; 533 }; 534 535 static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 536 struct ieee80211_vif *vif) 537 { 538 struct iwl_mvm_stat_data *data = _data; 539 struct iwl_mvm *mvm = data->mvm; 540 int sig = -data->beacon_filter_average_energy; 541 int last_event; 542 int thold = vif->bss_conf.cqm_rssi_thold; 543 int hyst = vif->bss_conf.cqm_rssi_hyst; 544 u16 id = le32_to_cpu(data->mac_id); 545 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 546 u16 vif_id = mvmvif->id; 547 548 /* This doesn't need the MAC ID check since it's not taking the 549 * data copied into the "data" struct, but rather the data from 550 * the notification directly. 551 */ 552 mvmvif->beacon_stats.num_beacons = 553 le32_to_cpu(data->beacon_counter[vif_id]); 554 mvmvif->beacon_stats.avg_signal = 555 -data->beacon_average_energy[vif_id]; 556 557 /* make sure that beacon statistics don't go backwards with TCM 558 * request to clear statistics 559 */ 560 if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 561 mvmvif->beacon_stats.accu_num_beacons += 562 mvmvif->beacon_stats.num_beacons; 563 564 if (mvmvif->id != id) 565 return; 566 567 if (vif->type != NL80211_IFTYPE_STATION) 568 return; 569 570 if (sig == 0) { 571 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); 572 return; 573 } 574 575 mvmvif->bf_data.ave_beacon_signal = sig; 576 577 /* BT Coex */ 578 if (mvmvif->bf_data.bt_coex_min_thold != 579 mvmvif->bf_data.bt_coex_max_thold) { 580 last_event = mvmvif->bf_data.last_bt_coex_event; 581 if (sig > mvmvif->bf_data.bt_coex_max_thold && 582 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 583 last_event == 0)) { 584 mvmvif->bf_data.last_bt_coex_event = sig; 585 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 586 sig); 587 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 588 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 589 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 590 last_event == 0)) { 591 mvmvif->bf_data.last_bt_coex_event = sig; 592 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 593 sig); 594 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 595 } 596 } 597 598 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 599 return; 600 601 /* CQM Notification */ 602 last_event = mvmvif->bf_data.last_cqm_event; 603 if (thold && sig < thold && (last_event == 0 || 604 sig < last_event - hyst)) { 605 mvmvif->bf_data.last_cqm_event = sig; 606 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 607 sig); 608 ieee80211_cqm_rssi_notify( 609 vif, 610 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 611 sig, 612 GFP_KERNEL); 613 } else if (sig > thold && 614 (last_event == 0 || sig > last_event + hyst)) { 615 mvmvif->bf_data.last_cqm_event = sig; 616 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 617 sig); 618 ieee80211_cqm_rssi_notify( 619 vif, 620 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 621 sig, 622 GFP_KERNEL); 623 } 624 } 625 626 static inline void 627 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) 628 { 629 struct iwl_fw_dbg_trigger_tlv *trig; 630 struct iwl_fw_dbg_trigger_stats *trig_stats; 631 u32 trig_offset, trig_thold; 632 633 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS); 634 if (!trig) 635 return; 636 637 trig_stats = (void *)trig->data; 638 639 trig_offset = le32_to_cpu(trig_stats->stop_offset); 640 trig_thold = le32_to_cpu(trig_stats->stop_threshold); 641 642 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) 643 return; 644 645 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) 646 return; 647 648 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL); 649 } 650 651 static void iwl_mvm_stats_energy_iter(void *_data, 652 struct ieee80211_sta *sta) 653 { 654 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 655 u8 *energy = _data; 656 u32 sta_id = mvmsta->sta_id; 657 658 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT_MAX, "sta_id %d >= %d", 659 sta_id, IWL_MVM_STATION_COUNT_MAX)) 660 return; 661 662 if (energy[sta_id]) 663 mvmsta->avg_energy = energy[sta_id]; 664 665 } 666 667 static void 668 iwl_mvm_update_tcm_from_stats(struct iwl_mvm *mvm, __le32 *air_time_le, 669 __le32 *rx_bytes_le) 670 { 671 int i; 672 673 spin_lock(&mvm->tcm.lock); 674 for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) { 675 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i]; 676 u32 rx_bytes = le32_to_cpu(rx_bytes_le[i]); 677 u32 airtime = le32_to_cpu(air_time_le[i]); 678 679 mdata->rx.airtime += airtime; 680 mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes; 681 if (airtime) { 682 /* re-init every time to store rate from FW */ 683 ewma_rate_init(&mdata->uapsd_nonagg_detect.rate); 684 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, 685 rx_bytes * 8 / airtime); 686 } 687 } 688 spin_unlock(&mvm->tcm.lock); 689 } 690 691 static void 692 iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm *mvm, 693 struct iwl_rx_packet *pkt) 694 { 695 struct iwl_mvm_stat_data data = { 696 .mvm = mvm, 697 }; 698 u8 beacon_average_energy[MAC_INDEX_AUX]; 699 u8 average_energy[IWL_MVM_STATION_COUNT_MAX]; 700 struct iwl_statistics_operational_ntfy *stats; 701 int expected_size; 702 __le32 flags; 703 int i; 704 705 expected_size = sizeof(*stats); 706 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) < expected_size, 707 "received invalid statistics size (%d)!, expected_size: %d\n", 708 iwl_rx_packet_payload_len(pkt), expected_size)) 709 return; 710 711 stats = (void *)&pkt->data; 712 713 if (WARN_ONCE(stats->hdr.type != FW_STATISTICS_OPERATIONAL || 714 stats->hdr.version != 715 iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, STATISTICS_CMD, 0), 716 "received unsupported hdr type %d, version %d\n", 717 stats->hdr.type, stats->hdr.version)) 718 return; 719 720 flags = stats->flags; 721 mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time); 722 mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time); 723 mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf); 724 mvm->radio_stats.on_time_scan = le64_to_cpu(stats->on_time_scan); 725 726 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 727 728 data.mac_id = stats->mac_id; 729 data.beacon_filter_average_energy = 730 le32_to_cpu(stats->beacon_filter_average_energy); 731 data.flags = flags; 732 data.beacon_counter = stats->beacon_counter; 733 for (i = 0; i < ARRAY_SIZE(beacon_average_energy); i++) 734 beacon_average_energy[i] = 735 le32_to_cpu(stats->beacon_average_energy[i]); 736 737 data.beacon_average_energy = beacon_average_energy; 738 739 ieee80211_iterate_active_interfaces(mvm->hw, 740 IEEE80211_IFACE_ITER_NORMAL, 741 iwl_mvm_stat_iterator, 742 &data); 743 744 for (i = 0; i < ARRAY_SIZE(average_energy); i++) 745 average_energy[i] = le32_to_cpu(stats->average_energy[i]); 746 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter, 747 average_energy); 748 /* 749 * Don't update in case the statistics are not cleared, since 750 * we will end up counting twice the same airtime, once in TCM 751 * request and once in statistics notification. 752 */ 753 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 754 iwl_mvm_update_tcm_from_stats(mvm, stats->air_time, 755 stats->rx_bytes); 756 } 757 758 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, 759 struct iwl_rx_packet *pkt) 760 { 761 struct iwl_mvm_stat_data data = { 762 .mvm = mvm, 763 }; 764 __le32 *bytes, *air_time, flags; 765 int expected_size; 766 u8 *energy; 767 768 /* From ver 14 and up we use TLV statistics format */ 769 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, 770 STATISTICS_CMD, 0) >= 14) 771 return iwl_mvm_handle_rx_statistics_tlv(mvm, pkt); 772 773 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 774 if (iwl_mvm_has_new_rx_api(mvm)) 775 expected_size = sizeof(struct iwl_notif_statistics_v11); 776 else 777 expected_size = sizeof(struct iwl_notif_statistics_v10); 778 } else { 779 expected_size = sizeof(struct iwl_notif_statistics); 780 } 781 782 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size, 783 "received invalid statistics size (%d)!\n", 784 iwl_rx_packet_payload_len(pkt))) 785 return; 786 787 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 788 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data; 789 790 data.mac_id = stats->rx.general.mac_id; 791 data.beacon_filter_average_energy = 792 stats->general.common.beacon_filter_average_energy; 793 794 mvm->rx_stats_v3 = stats->rx; 795 796 mvm->radio_stats.rx_time = 797 le64_to_cpu(stats->general.common.rx_time); 798 mvm->radio_stats.tx_time = 799 le64_to_cpu(stats->general.common.tx_time); 800 mvm->radio_stats.on_time_rf = 801 le64_to_cpu(stats->general.common.on_time_rf); 802 mvm->radio_stats.on_time_scan = 803 le64_to_cpu(stats->general.common.on_time_scan); 804 805 data.beacon_counter = stats->general.beacon_counter; 806 data.beacon_average_energy = 807 stats->general.beacon_average_energy; 808 flags = stats->flag; 809 } else { 810 struct iwl_notif_statistics *stats = (void *)&pkt->data; 811 812 data.mac_id = stats->rx.general.mac_id; 813 data.beacon_filter_average_energy = 814 stats->general.common.beacon_filter_average_energy; 815 816 mvm->rx_stats = stats->rx; 817 818 mvm->radio_stats.rx_time = 819 le64_to_cpu(stats->general.common.rx_time); 820 mvm->radio_stats.tx_time = 821 le64_to_cpu(stats->general.common.tx_time); 822 mvm->radio_stats.on_time_rf = 823 le64_to_cpu(stats->general.common.on_time_rf); 824 mvm->radio_stats.on_time_scan = 825 le64_to_cpu(stats->general.common.on_time_scan); 826 827 data.beacon_counter = stats->general.beacon_counter; 828 data.beacon_average_energy = 829 stats->general.beacon_average_energy; 830 flags = stats->flag; 831 } 832 data.flags = flags; 833 834 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 835 836 ieee80211_iterate_active_interfaces(mvm->hw, 837 IEEE80211_IFACE_ITER_NORMAL, 838 iwl_mvm_stat_iterator, 839 &data); 840 841 if (!iwl_mvm_has_new_rx_api(mvm)) 842 return; 843 844 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 845 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data; 846 847 energy = (void *)&v11->load_stats.avg_energy; 848 bytes = (void *)&v11->load_stats.byte_count; 849 air_time = (void *)&v11->load_stats.air_time; 850 } else { 851 struct iwl_notif_statistics *stats = (void *)&pkt->data; 852 853 energy = (void *)&stats->load_stats.avg_energy; 854 bytes = (void *)&stats->load_stats.byte_count; 855 air_time = (void *)&stats->load_stats.air_time; 856 } 857 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter, 858 energy); 859 860 /* 861 * Don't update in case the statistics are not cleared, since 862 * we will end up counting twice the same airtime, once in TCM 863 * request and once in statistics notification. 864 */ 865 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 866 iwl_mvm_update_tcm_from_stats(mvm, air_time, bytes); 867 868 } 869 870 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 871 { 872 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); 873 } 874 875 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, 876 struct iwl_rx_cmd_buffer *rxb) 877 { 878 struct iwl_rx_packet *pkt = rxb_addr(rxb); 879 struct iwl_ba_window_status_notif *notif = (void *)pkt->data; 880 int i; 881 882 BUILD_BUG_ON(ARRAY_SIZE(notif->ra_tid) != BA_WINDOW_STREAMS_MAX); 883 BUILD_BUG_ON(ARRAY_SIZE(notif->mpdu_rx_count) != BA_WINDOW_STREAMS_MAX); 884 BUILD_BUG_ON(ARRAY_SIZE(notif->bitmap) != BA_WINDOW_STREAMS_MAX); 885 BUILD_BUG_ON(ARRAY_SIZE(notif->start_seq_num) != BA_WINDOW_STREAMS_MAX); 886 887 rcu_read_lock(); 888 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { 889 struct ieee80211_sta *sta; 890 u8 sta_id, tid; 891 u64 bitmap; 892 u32 ssn; 893 u16 ratid; 894 u16 received_mpdu; 895 896 ratid = le16_to_cpu(notif->ra_tid[i]); 897 /* check that this TID is valid */ 898 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) 899 continue; 900 901 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); 902 if (received_mpdu == 0) 903 continue; 904 905 tid = ratid & BA_WINDOW_STATUS_TID_MSK; 906 /* get the station */ 907 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) 908 >> BA_WINDOW_STATUS_STA_ID_POS; 909 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 910 if (IS_ERR_OR_NULL(sta)) 911 continue; 912 bitmap = le64_to_cpu(notif->bitmap[i]); 913 ssn = le32_to_cpu(notif->start_seq_num[i]); 914 915 /* update mac80211 with the bitmap for the reordering buffer */ 916 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, 917 received_mpdu); 918 } 919 rcu_read_unlock(); 920 } 921