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 - 2020 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 - 2020 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 <asm/unaligned.h> 64 #include <linux/etherdevice.h> 65 #include <linux/skbuff.h> 66 #include "iwl-trans.h" 67 #include "mvm.h" 68 #include "fw-api.h" 69 70 /* 71 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler 72 * 73 * Copies the phy information in mvm->last_phy_info, it will be used when the 74 * actual data will come from the fw in the next packet. 75 */ 76 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 77 { 78 struct iwl_rx_packet *pkt = rxb_addr(rxb); 79 80 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info)); 81 mvm->ampdu_ref++; 82 83 #ifdef CONFIG_IWLWIFI_DEBUGFS 84 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 85 spin_lock(&mvm->drv_stats_lock); 86 mvm->drv_rx_stats.ampdu_count++; 87 spin_unlock(&mvm->drv_stats_lock); 88 } 89 #endif 90 } 91 92 /* 93 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211 94 * 95 * Adds the rxb to a new skb and give it to mac80211 96 */ 97 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 98 struct ieee80211_sta *sta, 99 struct napi_struct *napi, 100 struct sk_buff *skb, 101 struct ieee80211_hdr *hdr, u16 len, 102 u8 crypt_len, 103 struct iwl_rx_cmd_buffer *rxb) 104 { 105 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 106 unsigned int fraglen; 107 108 /* 109 * The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len, 110 * but those are all multiples of 4 long) all goes away, but we 111 * want the *end* of it, which is going to be the start of the IP 112 * header, to be aligned when it gets pulled in. 113 * The beginning of the skb->data is aligned on at least a 4-byte 114 * boundary after allocation. Everything here is aligned at least 115 * on a 2-byte boundary so we can just take hdrlen & 3 and pad by 116 * the result. 117 */ 118 skb_reserve(skb, hdrlen & 3); 119 120 /* If frame is small enough to fit in skb->head, pull it completely. 121 * If not, only pull ieee80211_hdr (including crypto if present, and 122 * an additional 8 bytes for SNAP/ethertype, see below) so that 123 * splice() or TCP coalesce are more efficient. 124 * 125 * Since, in addition, ieee80211_data_to_8023() always pull in at 126 * least 8 bytes (possibly more for mesh) we can do the same here 127 * to save the cost of doing it later. That still doesn't pull in 128 * the actual IP header since the typical case has a SNAP header. 129 * If the latter changes (there are efforts in the standards group 130 * to do so) we should revisit this and ieee80211_data_to_8023(). 131 */ 132 hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8; 133 134 skb_put_data(skb, hdr, hdrlen); 135 fraglen = len - hdrlen; 136 137 if (fraglen) { 138 int offset = (void *)hdr + hdrlen - 139 rxb_addr(rxb) + rxb_offset(rxb); 140 141 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 142 fraglen, rxb->truesize); 143 } 144 145 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 146 } 147 148 /* 149 * iwl_mvm_get_signal_strength - use new rx PHY INFO API 150 * values are reported by the fw as positive values - need to negate 151 * to obtain their dBM. Account for missing antennas by replacing 0 152 * values by -256dBm: practically 0 power and a non-feasible 8 bit value. 153 */ 154 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 155 struct iwl_rx_phy_info *phy_info, 156 struct ieee80211_rx_status *rx_status) 157 { 158 int energy_a, energy_b, energy_c, max_energy; 159 u32 val; 160 161 val = 162 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]); 163 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> 164 IWL_RX_INFO_ENERGY_ANT_A_POS; 165 energy_a = energy_a ? -energy_a : S8_MIN; 166 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> 167 IWL_RX_INFO_ENERGY_ANT_B_POS; 168 energy_b = energy_b ? -energy_b : S8_MIN; 169 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> 170 IWL_RX_INFO_ENERGY_ANT_C_POS; 171 energy_c = energy_c ? -energy_c : S8_MIN; 172 max_energy = max(energy_a, energy_b); 173 max_energy = max(max_energy, energy_c); 174 175 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n", 176 energy_a, energy_b, energy_c, max_energy); 177 178 rx_status->signal = max_energy; 179 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) & 180 RX_RES_PHY_FLAGS_ANTENNA) 181 >> RX_RES_PHY_FLAGS_ANTENNA_POS; 182 rx_status->chain_signal[0] = energy_a; 183 rx_status->chain_signal[1] = energy_b; 184 rx_status->chain_signal[2] = energy_c; 185 } 186 187 /* 188 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format 189 * @mvm: the mvm object 190 * @hdr: 80211 header 191 * @stats: status in mac80211's format 192 * @rx_pkt_status: status coming from fw 193 * 194 * returns non 0 value if the packet should be dropped 195 */ 196 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, 197 struct ieee80211_hdr *hdr, 198 struct ieee80211_rx_status *stats, 199 u32 rx_pkt_status, 200 u8 *crypt_len) 201 { 202 if (!ieee80211_has_protected(hdr->frame_control) || 203 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 204 RX_MPDU_RES_STATUS_SEC_NO_ENC) 205 return 0; 206 207 /* packet was encrypted with unknown alg */ 208 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 209 RX_MPDU_RES_STATUS_SEC_ENC_ERR) 210 return 0; 211 212 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { 213 case RX_MPDU_RES_STATUS_SEC_CCM_ENC: 214 /* alg is CCM: check MIC only */ 215 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 216 return -1; 217 218 stats->flag |= RX_FLAG_DECRYPTED; 219 *crypt_len = IEEE80211_CCMP_HDR_LEN; 220 return 0; 221 222 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: 223 /* Don't drop the frame and decrypt it in SW */ 224 if (!fw_has_api(&mvm->fw->ucode_capa, 225 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 226 !(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) 227 return 0; 228 *crypt_len = IEEE80211_TKIP_IV_LEN; 229 /* fall through */ 230 231 case RX_MPDU_RES_STATUS_SEC_WEP_ENC: 232 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) 233 return -1; 234 235 stats->flag |= RX_FLAG_DECRYPTED; 236 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 237 RX_MPDU_RES_STATUS_SEC_WEP_ENC) 238 *crypt_len = IEEE80211_WEP_IV_LEN; 239 return 0; 240 241 case RX_MPDU_RES_STATUS_SEC_EXT_ENC: 242 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 243 return -1; 244 stats->flag |= RX_FLAG_DECRYPTED; 245 return 0; 246 247 default: 248 /* Expected in monitor (not having the keys) */ 249 if (!mvm->monitor_on) 250 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); 251 } 252 253 return 0; 254 } 255 256 static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm, 257 struct ieee80211_sta *sta, 258 struct ieee80211_hdr *hdr, u32 len, 259 struct iwl_rx_phy_info *phy_info, 260 u32 rate_n_flags) 261 { 262 struct iwl_mvm_sta *mvmsta; 263 struct iwl_mvm_tcm_mac *mdata; 264 int mac; 265 int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */ 266 struct iwl_mvm_vif *mvmvif; 267 /* expected throughput in 100Kbps, single stream, 20 MHz */ 268 static const u8 thresh_tpt[] = { 269 9, 18, 30, 42, 60, 78, 90, 96, 120, 135, 270 }; 271 u16 thr; 272 273 if (ieee80211_is_data_qos(hdr->frame_control)) 274 ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)]; 275 276 mvmsta = iwl_mvm_sta_from_mac80211(sta); 277 mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 278 279 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 280 schedule_delayed_work(&mvm->tcm.work, 0); 281 mdata = &mvm->tcm.data[mac]; 282 mdata->rx.pkts[ac]++; 283 284 /* count the airtime only once for each ampdu */ 285 if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) { 286 mdata->rx.last_ampdu_ref = mvm->ampdu_ref; 287 mdata->rx.airtime += le16_to_cpu(phy_info->frame_time); 288 } 289 290 if (!(rate_n_flags & (RATE_MCS_HT_MSK | RATE_MCS_VHT_MSK))) 291 return; 292 293 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 294 295 if (mdata->opened_rx_ba_sessions || 296 mdata->uapsd_nonagg_detect.detected || 297 (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd && 298 !mvmvif->queue_params[IEEE80211_AC_VI].uapsd && 299 !mvmvif->queue_params[IEEE80211_AC_BE].uapsd && 300 !mvmvif->queue_params[IEEE80211_AC_BK].uapsd) || 301 mvmsta->sta_id != mvmvif->ap_sta_id) 302 return; 303 304 if (rate_n_flags & RATE_MCS_HT_MSK) { 305 thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK]; 306 thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK) >> 307 RATE_HT_MCS_NSS_POS); 308 } else { 309 if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >= 310 ARRAY_SIZE(thresh_tpt))) 311 return; 312 thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK]; 313 thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 314 RATE_VHT_MCS_NSS_POS); 315 } 316 317 thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) >> 318 RATE_MCS_CHAN_WIDTH_POS); 319 320 mdata->uapsd_nonagg_detect.rx_bytes += len; 321 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr); 322 } 323 324 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 325 struct sk_buff *skb, 326 u32 status) 327 { 328 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 329 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 330 331 if (mvmvif->features & NETIF_F_RXCSUM && 332 status & RX_MPDU_RES_STATUS_CSUM_DONE && 333 status & RX_MPDU_RES_STATUS_CSUM_OK) 334 skb->ip_summed = CHECKSUM_UNNECESSARY; 335 } 336 337 /* 338 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 339 * 340 * Handles the actual data of the Rx packet from the fw 341 */ 342 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, 343 struct iwl_rx_cmd_buffer *rxb) 344 { 345 struct ieee80211_hdr *hdr; 346 struct ieee80211_rx_status *rx_status; 347 struct iwl_rx_packet *pkt = rxb_addr(rxb); 348 struct iwl_rx_phy_info *phy_info; 349 struct iwl_rx_mpdu_res_start *rx_res; 350 struct ieee80211_sta *sta = NULL; 351 struct sk_buff *skb; 352 u32 len, pkt_len = iwl_rx_packet_payload_len(pkt); 353 u32 rate_n_flags; 354 u32 rx_pkt_status; 355 u8 crypt_len = 0; 356 357 phy_info = &mvm->last_phy_info; 358 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 359 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 360 len = le16_to_cpu(rx_res->byte_count); 361 362 if (unlikely(len + sizeof(*rx_res) + sizeof(__le32) > pkt_len)) { 363 IWL_DEBUG_DROP(mvm, "FW lied about packet len\n"); 364 return; 365 } 366 367 rx_pkt_status = get_unaligned_le32((__le32 *) 368 (pkt->data + sizeof(*rx_res) + len)); 369 370 /* Dont use dev_alloc_skb(), we'll have enough headroom once 371 * ieee80211_hdr pulled. 372 */ 373 skb = alloc_skb(128, GFP_ATOMIC); 374 if (!skb) { 375 IWL_ERR(mvm, "alloc_skb failed\n"); 376 return; 377 } 378 379 rx_status = IEEE80211_SKB_RXCB(skb); 380 381 /* 382 * drop the packet if it has failed being decrypted by HW 383 */ 384 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, 385 &crypt_len)) { 386 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 387 rx_pkt_status); 388 kfree_skb(skb); 389 return; 390 } 391 392 /* 393 * Keep packets with CRC errors (and with overrun) for monitor mode 394 * (otherwise the firmware discards them) but mark them as bad. 395 */ 396 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 397 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 398 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 399 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 400 } 401 402 /* This will be used in several places later */ 403 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 404 405 /* rx_status carries information about the packet to mac80211 */ 406 rx_status->mactime = le64_to_cpu(phy_info->timestamp); 407 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); 408 rx_status->band = 409 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 410 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 411 rx_status->freq = 412 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 413 rx_status->band); 414 415 /* TSF as indicated by the firmware is at INA time */ 416 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 417 418 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); 419 420 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, 421 (unsigned long long)rx_status->mactime); 422 423 rcu_read_lock(); 424 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { 425 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; 426 427 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; 428 429 if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) { 430 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 431 if (IS_ERR(sta)) 432 sta = NULL; 433 } 434 } else if (!is_multicast_ether_addr(hdr->addr2)) { 435 /* This is fine since we prevent two stations with the same 436 * address from being added. 437 */ 438 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 439 } 440 441 if (sta) { 442 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 443 struct ieee80211_vif *tx_blocked_vif = 444 rcu_dereference(mvm->csa_tx_blocked_vif); 445 struct iwl_fw_dbg_trigger_tlv *trig; 446 struct ieee80211_vif *vif = mvmsta->vif; 447 448 /* We have tx blocked stations (with CS bit). If we heard 449 * frames from a blocked station on a new channel we can 450 * TX to it again. 451 */ 452 if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) { 453 struct iwl_mvm_vif *mvmvif = 454 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 455 456 if (mvmvif->csa_target_freq == rx_status->freq) 457 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 458 false); 459 } 460 461 rs_update_last_rssi(mvm, mvmsta, rx_status); 462 463 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 464 ieee80211_vif_to_wdev(vif), 465 FW_DBG_TRIGGER_RSSI); 466 467 if (trig && ieee80211_is_beacon(hdr->frame_control)) { 468 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 469 s32 rssi; 470 471 rssi_trig = (void *)trig->data; 472 rssi = le32_to_cpu(rssi_trig->rssi); 473 474 if (rx_status->signal < rssi) 475 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 476 NULL); 477 } 478 479 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 480 !is_multicast_ether_addr(hdr->addr1) && 481 ieee80211_is_data(hdr->frame_control)) 482 iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info, 483 rate_n_flags); 484 485 if (ieee80211_is_data(hdr->frame_control)) 486 iwl_mvm_rx_csum(sta, skb, rx_pkt_status); 487 } 488 rcu_read_unlock(); 489 490 /* set the preamble flag if appropriate */ 491 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 492 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 493 494 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 495 /* 496 * We know which subframes of an A-MPDU belong 497 * together since we get a single PHY response 498 * from the firmware for all of them 499 */ 500 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 501 rx_status->ampdu_reference = mvm->ampdu_ref; 502 } 503 504 /* Set up the HT phy flags */ 505 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 506 case RATE_MCS_CHAN_WIDTH_20: 507 break; 508 case RATE_MCS_CHAN_WIDTH_40: 509 rx_status->bw = RATE_INFO_BW_40; 510 break; 511 case RATE_MCS_CHAN_WIDTH_80: 512 rx_status->bw = RATE_INFO_BW_80; 513 break; 514 case RATE_MCS_CHAN_WIDTH_160: 515 rx_status->bw = RATE_INFO_BW_160; 516 break; 517 } 518 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 519 rate_n_flags & RATE_MCS_SGI_MSK) 520 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 521 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 522 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 523 if (rate_n_flags & RATE_MCS_LDPC_MSK) 524 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 525 if (rate_n_flags & RATE_MCS_HT_MSK) { 526 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 527 RATE_MCS_STBC_POS; 528 rx_status->encoding = RX_ENC_HT; 529 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 530 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 531 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 532 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 533 RATE_MCS_STBC_POS; 534 rx_status->nss = 535 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 536 RATE_VHT_MCS_NSS_POS) + 1; 537 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 538 rx_status->encoding = RX_ENC_VHT; 539 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 540 if (rate_n_flags & RATE_MCS_BF_MSK) 541 rx_status->enc_flags |= RX_ENC_FLAG_BF; 542 } else { 543 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 544 rx_status->band); 545 546 if (WARN(rate < 0 || rate > 0xFF, 547 "Invalid rate flags 0x%x, band %d,\n", 548 rate_n_flags, rx_status->band)) { 549 kfree_skb(skb); 550 return; 551 } 552 rx_status->rate_idx = rate; 553 } 554 555 #ifdef CONFIG_IWLWIFI_DEBUGFS 556 iwl_mvm_update_frame_stats(mvm, rate_n_flags, 557 rx_status->flag & RX_FLAG_AMPDU_DETAILS); 558 #endif 559 560 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 561 ieee80211_is_probe_resp(hdr->frame_control)) && 562 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) 563 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 564 565 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 566 ieee80211_is_probe_resp(hdr->frame_control))) 567 rx_status->boottime_ns = ktime_get_boottime_ns(); 568 569 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, 570 crypt_len, rxb); 571 } 572 573 struct iwl_mvm_stat_data { 574 struct iwl_mvm *mvm; 575 __le32 flags; 576 __le32 mac_id; 577 u8 beacon_filter_average_energy; 578 __le32 *beacon_counter; 579 u8 *beacon_average_energy; 580 }; 581 582 static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 583 struct ieee80211_vif *vif) 584 { 585 struct iwl_mvm_stat_data *data = _data; 586 struct iwl_mvm *mvm = data->mvm; 587 int sig = -data->beacon_filter_average_energy; 588 int last_event; 589 int thold = vif->bss_conf.cqm_rssi_thold; 590 int hyst = vif->bss_conf.cqm_rssi_hyst; 591 u16 id = le32_to_cpu(data->mac_id); 592 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 593 u16 vif_id = mvmvif->id; 594 595 /* This doesn't need the MAC ID check since it's not taking the 596 * data copied into the "data" struct, but rather the data from 597 * the notification directly. 598 */ 599 mvmvif->beacon_stats.num_beacons = 600 le32_to_cpu(data->beacon_counter[vif_id]); 601 mvmvif->beacon_stats.avg_signal = 602 -data->beacon_average_energy[vif_id]; 603 604 /* make sure that beacon statistics don't go backwards with TCM 605 * request to clear statistics 606 */ 607 if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 608 mvmvif->beacon_stats.accu_num_beacons += 609 mvmvif->beacon_stats.num_beacons; 610 611 if (mvmvif->id != id) 612 return; 613 614 if (vif->type != NL80211_IFTYPE_STATION) 615 return; 616 617 if (sig == 0) { 618 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); 619 return; 620 } 621 622 mvmvif->bf_data.ave_beacon_signal = sig; 623 624 /* BT Coex */ 625 if (mvmvif->bf_data.bt_coex_min_thold != 626 mvmvif->bf_data.bt_coex_max_thold) { 627 last_event = mvmvif->bf_data.last_bt_coex_event; 628 if (sig > mvmvif->bf_data.bt_coex_max_thold && 629 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 630 last_event == 0)) { 631 mvmvif->bf_data.last_bt_coex_event = sig; 632 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 633 sig); 634 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 635 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 636 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 637 last_event == 0)) { 638 mvmvif->bf_data.last_bt_coex_event = sig; 639 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 640 sig); 641 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 642 } 643 } 644 645 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 646 return; 647 648 /* CQM Notification */ 649 last_event = mvmvif->bf_data.last_cqm_event; 650 if (thold && sig < thold && (last_event == 0 || 651 sig < last_event - hyst)) { 652 mvmvif->bf_data.last_cqm_event = sig; 653 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 654 sig); 655 ieee80211_cqm_rssi_notify( 656 vif, 657 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 658 sig, 659 GFP_KERNEL); 660 } else if (sig > thold && 661 (last_event == 0 || sig > last_event + hyst)) { 662 mvmvif->bf_data.last_cqm_event = sig; 663 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 664 sig); 665 ieee80211_cqm_rssi_notify( 666 vif, 667 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 668 sig, 669 GFP_KERNEL); 670 } 671 } 672 673 static inline void 674 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) 675 { 676 struct iwl_fw_dbg_trigger_tlv *trig; 677 struct iwl_fw_dbg_trigger_stats *trig_stats; 678 u32 trig_offset, trig_thold; 679 680 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS); 681 if (!trig) 682 return; 683 684 trig_stats = (void *)trig->data; 685 686 trig_offset = le32_to_cpu(trig_stats->stop_offset); 687 trig_thold = le32_to_cpu(trig_stats->stop_threshold); 688 689 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) 690 return; 691 692 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) 693 return; 694 695 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL); 696 } 697 698 static void iwl_mvm_stats_energy_iter(void *_data, 699 struct ieee80211_sta *sta) 700 { 701 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 702 u8 *energy = _data; 703 u32 sta_id = mvmsta->sta_id; 704 705 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT_MAX, "sta_id %d >= %d", 706 sta_id, IWL_MVM_STATION_COUNT_MAX)) 707 return; 708 709 if (energy[sta_id]) 710 mvmsta->avg_energy = energy[sta_id]; 711 712 } 713 714 static void 715 iwl_mvm_update_tcm_from_stats(struct iwl_mvm *mvm, __le32 *air_time_le, 716 __le32 *rx_bytes_le) 717 { 718 int i; 719 720 spin_lock(&mvm->tcm.lock); 721 for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) { 722 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i]; 723 u32 rx_bytes = le32_to_cpu(rx_bytes_le[i]); 724 u32 airtime = le32_to_cpu(air_time_le[i]); 725 726 mdata->rx.airtime += airtime; 727 mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes; 728 if (airtime) { 729 /* re-init every time to store rate from FW */ 730 ewma_rate_init(&mdata->uapsd_nonagg_detect.rate); 731 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, 732 rx_bytes * 8 / airtime); 733 } 734 } 735 spin_unlock(&mvm->tcm.lock); 736 } 737 738 static void 739 iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm *mvm, 740 struct iwl_rx_packet *pkt) 741 { 742 struct iwl_mvm_stat_data data = { 743 .mvm = mvm, 744 }; 745 u8 beacon_average_energy[MAC_INDEX_AUX]; 746 u8 average_energy[IWL_MVM_STATION_COUNT_MAX]; 747 struct iwl_statistics_operational_ntfy *stats; 748 int expected_size; 749 __le32 flags; 750 int i; 751 752 expected_size = sizeof(*stats); 753 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) < expected_size, 754 "received invalid statistics size (%d)!, expected_size: %d\n", 755 iwl_rx_packet_payload_len(pkt), expected_size)) 756 return; 757 758 stats = (void *)&pkt->data; 759 760 if (WARN_ONCE(stats->hdr.type != FW_STATISTICS_OPERATIONAL || 761 stats->hdr.version != 1, 762 "received unsupported hdr type %d, version %d\n", 763 stats->hdr.type, stats->hdr.version)) 764 return; 765 766 flags = stats->flags; 767 mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time); 768 mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time); 769 mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf); 770 mvm->radio_stats.on_time_scan = le64_to_cpu(stats->on_time_scan); 771 772 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 773 774 data.mac_id = stats->mac_id; 775 data.beacon_filter_average_energy = 776 le32_to_cpu(stats->beacon_filter_average_energy); 777 data.flags = flags; 778 data.beacon_counter = stats->beacon_counter; 779 for (i = 0; i < ARRAY_SIZE(beacon_average_energy); i++) 780 beacon_average_energy[i] = 781 le32_to_cpu(stats->beacon_average_energy[i]); 782 783 data.beacon_average_energy = beacon_average_energy; 784 785 ieee80211_iterate_active_interfaces(mvm->hw, 786 IEEE80211_IFACE_ITER_NORMAL, 787 iwl_mvm_stat_iterator, 788 &data); 789 790 for (i = 0; i < ARRAY_SIZE(average_energy); i++) 791 average_energy[i] = le32_to_cpu(stats->average_energy[i]); 792 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter, 793 average_energy); 794 /* 795 * Don't update in case the statistics are not cleared, since 796 * we will end up counting twice the same airtime, once in TCM 797 * request and once in statistics notification. 798 */ 799 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 800 iwl_mvm_update_tcm_from_stats(mvm, stats->air_time, 801 stats->rx_bytes); 802 } 803 804 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, 805 struct iwl_rx_packet *pkt) 806 { 807 struct iwl_mvm_stat_data data = { 808 .mvm = mvm, 809 }; 810 __le32 *bytes, *air_time, flags; 811 int expected_size; 812 u8 *energy; 813 814 /* From ver 14 and up we use TLV statistics format */ 815 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, 816 STATISTICS_CMD, 0) >= 14) 817 return iwl_mvm_handle_rx_statistics_tlv(mvm, pkt); 818 819 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 820 if (iwl_mvm_has_new_rx_api(mvm)) 821 expected_size = sizeof(struct iwl_notif_statistics_v11); 822 else 823 expected_size = sizeof(struct iwl_notif_statistics_v10); 824 } else { 825 expected_size = sizeof(struct iwl_notif_statistics); 826 } 827 828 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size, 829 "received invalid statistics size (%d)!\n", 830 iwl_rx_packet_payload_len(pkt))) 831 return; 832 833 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 834 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data; 835 836 data.mac_id = stats->rx.general.mac_id; 837 data.beacon_filter_average_energy = 838 stats->general.common.beacon_filter_average_energy; 839 840 mvm->rx_stats_v3 = stats->rx; 841 842 mvm->radio_stats.rx_time = 843 le64_to_cpu(stats->general.common.rx_time); 844 mvm->radio_stats.tx_time = 845 le64_to_cpu(stats->general.common.tx_time); 846 mvm->radio_stats.on_time_rf = 847 le64_to_cpu(stats->general.common.on_time_rf); 848 mvm->radio_stats.on_time_scan = 849 le64_to_cpu(stats->general.common.on_time_scan); 850 851 data.beacon_counter = stats->general.beacon_counter; 852 data.beacon_average_energy = 853 stats->general.beacon_average_energy; 854 flags = stats->flag; 855 } else { 856 struct iwl_notif_statistics *stats = (void *)&pkt->data; 857 858 data.mac_id = stats->rx.general.mac_id; 859 data.beacon_filter_average_energy = 860 stats->general.common.beacon_filter_average_energy; 861 862 mvm->rx_stats = stats->rx; 863 864 mvm->radio_stats.rx_time = 865 le64_to_cpu(stats->general.common.rx_time); 866 mvm->radio_stats.tx_time = 867 le64_to_cpu(stats->general.common.tx_time); 868 mvm->radio_stats.on_time_rf = 869 le64_to_cpu(stats->general.common.on_time_rf); 870 mvm->radio_stats.on_time_scan = 871 le64_to_cpu(stats->general.common.on_time_scan); 872 873 data.beacon_counter = stats->general.beacon_counter; 874 data.beacon_average_energy = 875 stats->general.beacon_average_energy; 876 flags = stats->flag; 877 } 878 data.flags = flags; 879 880 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 881 882 ieee80211_iterate_active_interfaces(mvm->hw, 883 IEEE80211_IFACE_ITER_NORMAL, 884 iwl_mvm_stat_iterator, 885 &data); 886 887 if (!iwl_mvm_has_new_rx_api(mvm)) 888 return; 889 890 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 891 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data; 892 893 energy = (void *)&v11->load_stats.avg_energy; 894 bytes = (void *)&v11->load_stats.byte_count; 895 air_time = (void *)&v11->load_stats.air_time; 896 } else { 897 struct iwl_notif_statistics *stats = (void *)&pkt->data; 898 899 energy = (void *)&stats->load_stats.avg_energy; 900 bytes = (void *)&stats->load_stats.byte_count; 901 air_time = (void *)&stats->load_stats.air_time; 902 } 903 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter, 904 energy); 905 906 /* 907 * Don't update in case the statistics are not cleared, since 908 * we will end up counting twice the same airtime, once in TCM 909 * request and once in statistics notification. 910 */ 911 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR) 912 iwl_mvm_update_tcm_from_stats(mvm, air_time, bytes); 913 914 } 915 916 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 917 { 918 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); 919 } 920 921 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, 922 struct iwl_rx_cmd_buffer *rxb) 923 { 924 struct iwl_rx_packet *pkt = rxb_addr(rxb); 925 struct iwl_ba_window_status_notif *notif = (void *)pkt->data; 926 int i; 927 u32 pkt_len = iwl_rx_packet_payload_len(pkt); 928 929 if (WARN_ONCE(pkt_len != sizeof(*notif), 930 "Received window status notification of wrong size (%u)\n", 931 pkt_len)) 932 return; 933 934 rcu_read_lock(); 935 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { 936 struct ieee80211_sta *sta; 937 u8 sta_id, tid; 938 u64 bitmap; 939 u32 ssn; 940 u16 ratid; 941 u16 received_mpdu; 942 943 ratid = le16_to_cpu(notif->ra_tid[i]); 944 /* check that this TID is valid */ 945 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) 946 continue; 947 948 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); 949 if (received_mpdu == 0) 950 continue; 951 952 tid = ratid & BA_WINDOW_STATUS_TID_MSK; 953 /* get the station */ 954 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) 955 >> BA_WINDOW_STATUS_STA_ID_POS; 956 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 957 if (IS_ERR_OR_NULL(sta)) 958 continue; 959 bitmap = le64_to_cpu(notif->bitmap[i]); 960 ssn = le32_to_cpu(notif->start_seq_num[i]); 961 962 /* update mac80211 with the bitmap for the reordering buffer */ 963 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, 964 received_mpdu); 965 } 966 rcu_read_unlock(); 967 } 968