1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * Copyright(c) 2018 - 2019 Intel Corporation 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of version 2 of the GNU General Public License as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, but 18 * WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * General Public License for more details. 21 * 22 * The full GNU General Public License is included in this distribution 23 * in the file called COPYING. 24 * 25 * Contact Information: 26 * Intel Linux Wireless <linuxwifi@intel.com> 27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28 * 29 * BSD LICENSE 30 * 31 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 33 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 34 * Copyright(c) 2018 - 2019 Intel Corporation 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 41 * * Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * * Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in 45 * the documentation and/or other materials provided with the 46 * distribution. 47 * * Neither the name Intel Corporation nor the names of its 48 * contributors may be used to endorse or promote products derived 49 * from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 *****************************************************************************/ 63 #include <linux/etherdevice.h> 64 #include <linux/skbuff.h> 65 #include "iwl-trans.h" 66 #include "mvm.h" 67 #include "fw-api.h" 68 69 /* 70 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler 71 * 72 * Copies the phy information in mvm->last_phy_info, it will be used when the 73 * actual data will come from the fw in the next packet. 74 */ 75 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 76 { 77 struct iwl_rx_packet *pkt = rxb_addr(rxb); 78 79 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info)); 80 mvm->ampdu_ref++; 81 82 #ifdef CONFIG_IWLWIFI_DEBUGFS 83 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 84 spin_lock(&mvm->drv_stats_lock); 85 mvm->drv_rx_stats.ampdu_count++; 86 spin_unlock(&mvm->drv_stats_lock); 87 } 88 #endif 89 } 90 91 /* 92 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211 93 * 94 * Adds the rxb to a new skb and give it to mac80211 95 */ 96 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 97 struct ieee80211_sta *sta, 98 struct napi_struct *napi, 99 struct sk_buff *skb, 100 struct ieee80211_hdr *hdr, u16 len, 101 u8 crypt_len, 102 struct iwl_rx_cmd_buffer *rxb) 103 { 104 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 105 unsigned int fraglen; 106 107 /* 108 * The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len, 109 * but those are all multiples of 4 long) all goes away, but we 110 * want the *end* of it, which is going to be the start of the IP 111 * header, to be aligned when it gets pulled in. 112 * The beginning of the skb->data is aligned on at least a 4-byte 113 * boundary after allocation. Everything here is aligned at least 114 * on a 2-byte boundary so we can just take hdrlen & 3 and pad by 115 * the result. 116 */ 117 skb_reserve(skb, hdrlen & 3); 118 119 /* If frame is small enough to fit in skb->head, pull it completely. 120 * If not, only pull ieee80211_hdr (including crypto if present, and 121 * an additional 8 bytes for SNAP/ethertype, see below) so that 122 * splice() or TCP coalesce are more efficient. 123 * 124 * Since, in addition, ieee80211_data_to_8023() always pull in at 125 * least 8 bytes (possibly more for mesh) we can do the same here 126 * to save the cost of doing it later. That still doesn't pull in 127 * the actual IP header since the typical case has a SNAP header. 128 * If the latter changes (there are efforts in the standards group 129 * to do so) we should revisit this and ieee80211_data_to_8023(). 130 */ 131 hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8; 132 133 skb_put_data(skb, hdr, hdrlen); 134 fraglen = len - hdrlen; 135 136 if (fraglen) { 137 int offset = (void *)hdr + hdrlen - 138 rxb_addr(rxb) + rxb_offset(rxb); 139 140 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 141 fraglen, rxb->truesize); 142 } 143 144 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 145 } 146 147 /* 148 * iwl_mvm_get_signal_strength - use new rx PHY INFO API 149 * values are reported by the fw as positive values - need to negate 150 * to obtain their dBM. Account for missing antennas by replacing 0 151 * values by -256dBm: practically 0 power and a non-feasible 8 bit value. 152 */ 153 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 154 struct iwl_rx_phy_info *phy_info, 155 struct ieee80211_rx_status *rx_status) 156 { 157 int energy_a, energy_b, energy_c, max_energy; 158 u32 val; 159 160 val = 161 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]); 162 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> 163 IWL_RX_INFO_ENERGY_ANT_A_POS; 164 energy_a = energy_a ? -energy_a : S8_MIN; 165 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> 166 IWL_RX_INFO_ENERGY_ANT_B_POS; 167 energy_b = energy_b ? -energy_b : S8_MIN; 168 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> 169 IWL_RX_INFO_ENERGY_ANT_C_POS; 170 energy_c = energy_c ? -energy_c : S8_MIN; 171 max_energy = max(energy_a, energy_b); 172 max_energy = max(max_energy, energy_c); 173 174 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n", 175 energy_a, energy_b, energy_c, max_energy); 176 177 rx_status->signal = max_energy; 178 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) & 179 RX_RES_PHY_FLAGS_ANTENNA) 180 >> RX_RES_PHY_FLAGS_ANTENNA_POS; 181 rx_status->chain_signal[0] = energy_a; 182 rx_status->chain_signal[1] = energy_b; 183 rx_status->chain_signal[2] = energy_c; 184 } 185 186 /* 187 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format 188 * @mvm: the mvm object 189 * @hdr: 80211 header 190 * @stats: status in mac80211's format 191 * @rx_pkt_status: status coming from fw 192 * 193 * returns non 0 value if the packet should be dropped 194 */ 195 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, 196 struct ieee80211_hdr *hdr, 197 struct ieee80211_rx_status *stats, 198 u32 rx_pkt_status, 199 u8 *crypt_len) 200 { 201 if (!ieee80211_has_protected(hdr->frame_control) || 202 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 203 RX_MPDU_RES_STATUS_SEC_NO_ENC) 204 return 0; 205 206 /* packet was encrypted with unknown alg */ 207 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 208 RX_MPDU_RES_STATUS_SEC_ENC_ERR) 209 return 0; 210 211 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { 212 case RX_MPDU_RES_STATUS_SEC_CCM_ENC: 213 /* alg is CCM: check MIC only */ 214 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 215 return -1; 216 217 stats->flag |= RX_FLAG_DECRYPTED; 218 *crypt_len = IEEE80211_CCMP_HDR_LEN; 219 return 0; 220 221 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: 222 /* Don't drop the frame and decrypt it in SW */ 223 if (!fw_has_api(&mvm->fw->ucode_capa, 224 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 225 !(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) 226 return 0; 227 *crypt_len = IEEE80211_TKIP_IV_LEN; 228 /* fall through */ 229 230 case RX_MPDU_RES_STATUS_SEC_WEP_ENC: 231 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) 232 return -1; 233 234 stats->flag |= RX_FLAG_DECRYPTED; 235 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 236 RX_MPDU_RES_STATUS_SEC_WEP_ENC) 237 *crypt_len = IEEE80211_WEP_IV_LEN; 238 return 0; 239 240 case RX_MPDU_RES_STATUS_SEC_EXT_ENC: 241 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 242 return -1; 243 stats->flag |= RX_FLAG_DECRYPTED; 244 return 0; 245 246 default: 247 /* Expected in monitor (not having the keys) */ 248 if (!mvm->monitor_on) 249 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); 250 } 251 252 return 0; 253 } 254 255 static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm, 256 struct ieee80211_sta *sta, 257 struct ieee80211_hdr *hdr, u32 len, 258 struct iwl_rx_phy_info *phy_info, 259 u32 rate_n_flags) 260 { 261 struct iwl_mvm_sta *mvmsta; 262 struct iwl_mvm_tcm_mac *mdata; 263 int mac; 264 int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */ 265 struct iwl_mvm_vif *mvmvif; 266 /* expected throughput in 100Kbps, single stream, 20 MHz */ 267 static const u8 thresh_tpt[] = { 268 9, 18, 30, 42, 60, 78, 90, 96, 120, 135, 269 }; 270 u16 thr; 271 272 if (ieee80211_is_data_qos(hdr->frame_control)) 273 ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)]; 274 275 mvmsta = iwl_mvm_sta_from_mac80211(sta); 276 mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 277 278 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 279 schedule_delayed_work(&mvm->tcm.work, 0); 280 mdata = &mvm->tcm.data[mac]; 281 mdata->rx.pkts[ac]++; 282 283 /* count the airtime only once for each ampdu */ 284 if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) { 285 mdata->rx.last_ampdu_ref = mvm->ampdu_ref; 286 mdata->rx.airtime += le16_to_cpu(phy_info->frame_time); 287 } 288 289 if (!(rate_n_flags & (RATE_MCS_HT_MSK | RATE_MCS_VHT_MSK))) 290 return; 291 292 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 293 294 if (mdata->opened_rx_ba_sessions || 295 mdata->uapsd_nonagg_detect.detected || 296 (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd && 297 !mvmvif->queue_params[IEEE80211_AC_VI].uapsd && 298 !mvmvif->queue_params[IEEE80211_AC_BE].uapsd && 299 !mvmvif->queue_params[IEEE80211_AC_BK].uapsd) || 300 mvmsta->sta_id != mvmvif->ap_sta_id) 301 return; 302 303 if (rate_n_flags & RATE_MCS_HT_MSK) { 304 thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK]; 305 thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK) >> 306 RATE_HT_MCS_NSS_POS); 307 } else { 308 if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >= 309 ARRAY_SIZE(thresh_tpt))) 310 return; 311 thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK]; 312 thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 313 RATE_VHT_MCS_NSS_POS); 314 } 315 316 thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) >> 317 RATE_MCS_CHAN_WIDTH_POS); 318 319 mdata->uapsd_nonagg_detect.rx_bytes += len; 320 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr); 321 } 322 323 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 324 struct sk_buff *skb, 325 u32 status) 326 { 327 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 328 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 329 330 if (mvmvif->features & NETIF_F_RXCSUM && 331 status & RX_MPDU_RES_STATUS_CSUM_DONE && 332 status & RX_MPDU_RES_STATUS_CSUM_OK) 333 skb->ip_summed = CHECKSUM_UNNECESSARY; 334 } 335 336 /* 337 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 338 * 339 * Handles the actual data of the Rx packet from the fw 340 */ 341 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, 342 struct iwl_rx_cmd_buffer *rxb) 343 { 344 struct ieee80211_hdr *hdr; 345 struct ieee80211_rx_status *rx_status; 346 struct iwl_rx_packet *pkt = rxb_addr(rxb); 347 struct iwl_rx_phy_info *phy_info; 348 struct iwl_rx_mpdu_res_start *rx_res; 349 struct ieee80211_sta *sta = NULL; 350 struct sk_buff *skb; 351 u32 len; 352 u32 rate_n_flags; 353 u32 rx_pkt_status; 354 u8 crypt_len = 0; 355 356 phy_info = &mvm->last_phy_info; 357 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 358 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 359 len = le16_to_cpu(rx_res->byte_count); 360 rx_pkt_status = le32_to_cpup((__le32 *) 361 (pkt->data + sizeof(*rx_res) + len)); 362 363 /* Dont use dev_alloc_skb(), we'll have enough headroom once 364 * ieee80211_hdr pulled. 365 */ 366 skb = alloc_skb(128, GFP_ATOMIC); 367 if (!skb) { 368 IWL_ERR(mvm, "alloc_skb failed\n"); 369 return; 370 } 371 372 rx_status = IEEE80211_SKB_RXCB(skb); 373 374 /* 375 * drop the packet if it has failed being decrypted by HW 376 */ 377 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, 378 &crypt_len)) { 379 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 380 rx_pkt_status); 381 kfree_skb(skb); 382 return; 383 } 384 385 /* 386 * Keep packets with CRC errors (and with overrun) for monitor mode 387 * (otherwise the firmware discards them) but mark them as bad. 388 */ 389 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 390 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 391 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 392 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 393 } 394 395 /* This will be used in several places later */ 396 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 397 398 /* rx_status carries information about the packet to mac80211 */ 399 rx_status->mactime = le64_to_cpu(phy_info->timestamp); 400 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); 401 rx_status->band = 402 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 403 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 404 rx_status->freq = 405 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 406 rx_status->band); 407 408 /* TSF as indicated by the firmware is at INA time */ 409 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 410 411 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); 412 413 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, 414 (unsigned long long)rx_status->mactime); 415 416 rcu_read_lock(); 417 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { 418 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; 419 420 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; 421 422 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 423 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 424 if (IS_ERR(sta)) 425 sta = NULL; 426 } 427 } else if (!is_multicast_ether_addr(hdr->addr2)) { 428 /* This is fine since we prevent two stations with the same 429 * address from being added. 430 */ 431 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 432 } 433 434 if (sta) { 435 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 436 struct ieee80211_vif *tx_blocked_vif = 437 rcu_dereference(mvm->csa_tx_blocked_vif); 438 struct iwl_fw_dbg_trigger_tlv *trig; 439 struct ieee80211_vif *vif = mvmsta->vif; 440 441 /* We have tx blocked stations (with CS bit). If we heard 442 * frames from a blocked station on a new channel we can 443 * TX to it again. 444 */ 445 if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) { 446 struct iwl_mvm_vif *mvmvif = 447 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 448 449 if (mvmvif->csa_target_freq == rx_status->freq) 450 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 451 false); 452 } 453 454 rs_update_last_rssi(mvm, mvmsta, rx_status); 455 456 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 457 ieee80211_vif_to_wdev(vif), 458 FW_DBG_TRIGGER_RSSI); 459 460 if (trig && ieee80211_is_beacon(hdr->frame_control)) { 461 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 462 s32 rssi; 463 464 rssi_trig = (void *)trig->data; 465 rssi = le32_to_cpu(rssi_trig->rssi); 466 467 if (rx_status->signal < rssi) 468 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 469 NULL); 470 } 471 472 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 473 !is_multicast_ether_addr(hdr->addr1) && 474 ieee80211_is_data(hdr->frame_control)) 475 iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info, 476 rate_n_flags); 477 478 if (ieee80211_is_data(hdr->frame_control)) 479 iwl_mvm_rx_csum(sta, skb, rx_pkt_status); 480 } 481 rcu_read_unlock(); 482 483 /* set the preamble flag if appropriate */ 484 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 485 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 486 487 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 488 /* 489 * We know which subframes of an A-MPDU belong 490 * together since we get a single PHY response 491 * from the firmware for all of them 492 */ 493 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 494 rx_status->ampdu_reference = mvm->ampdu_ref; 495 } 496 497 /* Set up the HT phy flags */ 498 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 499 case RATE_MCS_CHAN_WIDTH_20: 500 break; 501 case RATE_MCS_CHAN_WIDTH_40: 502 rx_status->bw = RATE_INFO_BW_40; 503 break; 504 case RATE_MCS_CHAN_WIDTH_80: 505 rx_status->bw = RATE_INFO_BW_80; 506 break; 507 case RATE_MCS_CHAN_WIDTH_160: 508 rx_status->bw = RATE_INFO_BW_160; 509 break; 510 } 511 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 512 rate_n_flags & RATE_MCS_SGI_MSK) 513 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 514 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 515 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 516 if (rate_n_flags & RATE_MCS_LDPC_MSK) 517 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 518 if (rate_n_flags & RATE_MCS_HT_MSK) { 519 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 520 RATE_MCS_STBC_POS; 521 rx_status->encoding = RX_ENC_HT; 522 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 523 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 524 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 525 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 526 RATE_MCS_STBC_POS; 527 rx_status->nss = 528 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 529 RATE_VHT_MCS_NSS_POS) + 1; 530 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 531 rx_status->encoding = RX_ENC_VHT; 532 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 533 if (rate_n_flags & RATE_MCS_BF_MSK) 534 rx_status->enc_flags |= RX_ENC_FLAG_BF; 535 } else { 536 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 537 rx_status->band); 538 539 if (WARN(rate < 0 || rate > 0xFF, 540 "Invalid rate flags 0x%x, band %d,\n", 541 rate_n_flags, rx_status->band)) { 542 kfree_skb(skb); 543 return; 544 } 545 rx_status->rate_idx = rate; 546 } 547 548 #ifdef CONFIG_IWLWIFI_DEBUGFS 549 iwl_mvm_update_frame_stats(mvm, rate_n_flags, 550 rx_status->flag & RX_FLAG_AMPDU_DETAILS); 551 #endif 552 553 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 554 ieee80211_is_probe_resp(hdr->frame_control)) && 555 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) 556 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 557 558 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 559 ieee80211_is_probe_resp(hdr->frame_control))) 560 rx_status->boottime_ns = ktime_get_boottime_ns(); 561 562 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, 563 crypt_len, rxb); 564 } 565 566 struct iwl_mvm_stat_data { 567 struct iwl_mvm *mvm; 568 __le32 mac_id; 569 u8 beacon_filter_average_energy; 570 void *general; 571 }; 572 573 static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 574 struct ieee80211_vif *vif) 575 { 576 struct iwl_mvm_stat_data *data = _data; 577 struct iwl_mvm *mvm = data->mvm; 578 int sig = -data->beacon_filter_average_energy; 579 int last_event; 580 int thold = vif->bss_conf.cqm_rssi_thold; 581 int hyst = vif->bss_conf.cqm_rssi_hyst; 582 u16 id = le32_to_cpu(data->mac_id); 583 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 584 u16 vif_id = mvmvif->id; 585 586 /* This doesn't need the MAC ID check since it's not taking the 587 * data copied into the "data" struct, but rather the data from 588 * the notification directly. 589 */ 590 if (iwl_mvm_has_new_rx_stats_api(mvm)) { 591 struct mvm_statistics_general *general = 592 data->general; 593 594 mvmvif->beacon_stats.num_beacons = 595 le32_to_cpu(general->beacon_counter[vif_id]); 596 mvmvif->beacon_stats.avg_signal = 597 -general->beacon_average_energy[vif_id]; 598 } else { 599 struct mvm_statistics_general_v8 *general = 600 data->general; 601 602 mvmvif->beacon_stats.num_beacons = 603 le32_to_cpu(general->beacon_counter[vif_id]); 604 mvmvif->beacon_stats.avg_signal = 605 -general->beacon_average_energy[vif_id]; 606 } 607 608 if (mvmvif->id != id) 609 return; 610 611 if (vif->type != NL80211_IFTYPE_STATION) 612 return; 613 614 if (sig == 0) { 615 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); 616 return; 617 } 618 619 mvmvif->bf_data.ave_beacon_signal = sig; 620 621 /* BT Coex */ 622 if (mvmvif->bf_data.bt_coex_min_thold != 623 mvmvif->bf_data.bt_coex_max_thold) { 624 last_event = mvmvif->bf_data.last_bt_coex_event; 625 if (sig > mvmvif->bf_data.bt_coex_max_thold && 626 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 627 last_event == 0)) { 628 mvmvif->bf_data.last_bt_coex_event = sig; 629 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 630 sig); 631 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 632 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 633 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 634 last_event == 0)) { 635 mvmvif->bf_data.last_bt_coex_event = sig; 636 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 637 sig); 638 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 639 } 640 } 641 642 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 643 return; 644 645 /* CQM Notification */ 646 last_event = mvmvif->bf_data.last_cqm_event; 647 if (thold && sig < thold && (last_event == 0 || 648 sig < last_event - hyst)) { 649 mvmvif->bf_data.last_cqm_event = sig; 650 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 651 sig); 652 ieee80211_cqm_rssi_notify( 653 vif, 654 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 655 sig, 656 GFP_KERNEL); 657 } else if (sig > thold && 658 (last_event == 0 || sig > last_event + hyst)) { 659 mvmvif->bf_data.last_cqm_event = sig; 660 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 661 sig); 662 ieee80211_cqm_rssi_notify( 663 vif, 664 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 665 sig, 666 GFP_KERNEL); 667 } 668 } 669 670 static inline void 671 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) 672 { 673 struct iwl_fw_dbg_trigger_tlv *trig; 674 struct iwl_fw_dbg_trigger_stats *trig_stats; 675 u32 trig_offset, trig_thold; 676 677 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS); 678 if (!trig) 679 return; 680 681 trig_stats = (void *)trig->data; 682 683 trig_offset = le32_to_cpu(trig_stats->stop_offset); 684 trig_thold = le32_to_cpu(trig_stats->stop_threshold); 685 686 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) 687 return; 688 689 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) 690 return; 691 692 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL); 693 } 694 695 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, 696 struct iwl_rx_packet *pkt) 697 { 698 struct iwl_mvm_stat_data data = { 699 .mvm = mvm, 700 }; 701 int expected_size; 702 int i; 703 u8 *energy; 704 __le32 *bytes; 705 __le32 *air_time; 706 __le32 flags; 707 708 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 709 if (iwl_mvm_has_new_rx_api(mvm)) 710 expected_size = sizeof(struct iwl_notif_statistics_v11); 711 else 712 expected_size = sizeof(struct iwl_notif_statistics_v10); 713 } else { 714 expected_size = sizeof(struct iwl_notif_statistics); 715 } 716 717 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size, 718 "received invalid statistics size (%d)!\n", 719 iwl_rx_packet_payload_len(pkt))) 720 return; 721 722 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 723 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data; 724 725 data.mac_id = stats->rx.general.mac_id; 726 data.beacon_filter_average_energy = 727 stats->general.common.beacon_filter_average_energy; 728 729 mvm->rx_stats_v3 = stats->rx; 730 731 mvm->radio_stats.rx_time = 732 le64_to_cpu(stats->general.common.rx_time); 733 mvm->radio_stats.tx_time = 734 le64_to_cpu(stats->general.common.tx_time); 735 mvm->radio_stats.on_time_rf = 736 le64_to_cpu(stats->general.common.on_time_rf); 737 mvm->radio_stats.on_time_scan = 738 le64_to_cpu(stats->general.common.on_time_scan); 739 740 data.general = &stats->general; 741 742 flags = stats->flag; 743 } else { 744 struct iwl_notif_statistics *stats = (void *)&pkt->data; 745 746 data.mac_id = stats->rx.general.mac_id; 747 data.beacon_filter_average_energy = 748 stats->general.common.beacon_filter_average_energy; 749 750 mvm->rx_stats = stats->rx; 751 752 mvm->radio_stats.rx_time = 753 le64_to_cpu(stats->general.common.rx_time); 754 mvm->radio_stats.tx_time = 755 le64_to_cpu(stats->general.common.tx_time); 756 mvm->radio_stats.on_time_rf = 757 le64_to_cpu(stats->general.common.on_time_rf); 758 mvm->radio_stats.on_time_scan = 759 le64_to_cpu(stats->general.common.on_time_scan); 760 761 data.general = &stats->general; 762 763 flags = stats->flag; 764 } 765 766 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 767 768 ieee80211_iterate_active_interfaces(mvm->hw, 769 IEEE80211_IFACE_ITER_NORMAL, 770 iwl_mvm_stat_iterator, 771 &data); 772 773 if (!iwl_mvm_has_new_rx_api(mvm)) 774 return; 775 776 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 777 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data; 778 779 energy = (void *)&v11->load_stats.avg_energy; 780 bytes = (void *)&v11->load_stats.byte_count; 781 air_time = (void *)&v11->load_stats.air_time; 782 } else { 783 struct iwl_notif_statistics *stats = (void *)&pkt->data; 784 785 energy = (void *)&stats->load_stats.avg_energy; 786 bytes = (void *)&stats->load_stats.byte_count; 787 air_time = (void *)&stats->load_stats.air_time; 788 } 789 790 rcu_read_lock(); 791 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 792 struct iwl_mvm_sta *sta; 793 794 if (!energy[i]) 795 continue; 796 797 sta = iwl_mvm_sta_from_staid_rcu(mvm, i); 798 if (!sta) 799 continue; 800 sta->avg_energy = energy[i]; 801 } 802 rcu_read_unlock(); 803 804 /* 805 * Don't update in case the statistics are not cleared, since 806 * we will end up counting twice the same airtime, once in TCM 807 * request and once in statistics notification. 808 */ 809 if (!(le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)) 810 return; 811 812 spin_lock(&mvm->tcm.lock); 813 for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) { 814 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i]; 815 u32 airtime = le32_to_cpu(air_time[i]); 816 u32 rx_bytes = le32_to_cpu(bytes[i]); 817 818 mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes; 819 if (airtime) { 820 /* re-init every time to store rate from FW */ 821 ewma_rate_init(&mdata->uapsd_nonagg_detect.rate); 822 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, 823 rx_bytes * 8 / airtime); 824 } 825 826 mdata->rx.airtime += airtime; 827 } 828 spin_unlock(&mvm->tcm.lock); 829 } 830 831 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 832 { 833 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); 834 } 835 836 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, 837 struct iwl_rx_cmd_buffer *rxb) 838 { 839 struct iwl_rx_packet *pkt = rxb_addr(rxb); 840 struct iwl_ba_window_status_notif *notif = (void *)pkt->data; 841 int i; 842 u32 pkt_len = iwl_rx_packet_payload_len(pkt); 843 844 if (WARN_ONCE(pkt_len != sizeof(*notif), 845 "Received window status notification of wrong size (%u)\n", 846 pkt_len)) 847 return; 848 849 rcu_read_lock(); 850 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { 851 struct ieee80211_sta *sta; 852 u8 sta_id, tid; 853 u64 bitmap; 854 u32 ssn; 855 u16 ratid; 856 u16 received_mpdu; 857 858 ratid = le16_to_cpu(notif->ra_tid[i]); 859 /* check that this TID is valid */ 860 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) 861 continue; 862 863 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); 864 if (received_mpdu == 0) 865 continue; 866 867 tid = ratid & BA_WINDOW_STATUS_TID_MSK; 868 /* get the station */ 869 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) 870 >> BA_WINDOW_STATUS_STA_ID_POS; 871 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 872 if (IS_ERR_OR_NULL(sta)) 873 continue; 874 bitmap = le64_to_cpu(notif->bitmap[i]); 875 ssn = le32_to_cpu(notif->start_seq_num[i]); 876 877 /* update mac80211 with the bitmap for the reordering buffer */ 878 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, 879 received_mpdu); 880 } 881 rcu_read_unlock(); 882 } 883