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 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * The full GNU General Public License is included in this distribution 22 * in the file called COPYING. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <linuxwifi@intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 * BSD LICENSE 29 * 30 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 31 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 32 * All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 38 * * Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * * Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in 42 * the documentation and/or other materials provided with the 43 * distribution. 44 * * Neither the name Intel Corporation nor the names of its 45 * contributors may be used to endorse or promote products derived 46 * from this software without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 49 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 50 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 51 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 52 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 53 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 54 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 55 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 56 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 57 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 58 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 59 *****************************************************************************/ 60 #include <linux/etherdevice.h> 61 #include <linux/skbuff.h> 62 #include "iwl-trans.h" 63 #include "mvm.h" 64 #include "fw-api.h" 65 66 /* 67 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler 68 * 69 * Copies the phy information in mvm->last_phy_info, it will be used when the 70 * actual data will come from the fw in the next packet. 71 */ 72 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 73 { 74 struct iwl_rx_packet *pkt = rxb_addr(rxb); 75 76 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info)); 77 mvm->ampdu_ref++; 78 79 #ifdef CONFIG_IWLWIFI_DEBUGFS 80 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 81 spin_lock(&mvm->drv_stats_lock); 82 mvm->drv_rx_stats.ampdu_count++; 83 spin_unlock(&mvm->drv_stats_lock); 84 } 85 #endif 86 } 87 88 /* 89 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211 90 * 91 * Adds the rxb to a new skb and give it to mac80211 92 */ 93 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 94 struct ieee80211_sta *sta, 95 struct napi_struct *napi, 96 struct sk_buff *skb, 97 struct ieee80211_hdr *hdr, u16 len, 98 u8 crypt_len, 99 struct iwl_rx_cmd_buffer *rxb) 100 { 101 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 102 unsigned int fraglen; 103 104 /* 105 * The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len, 106 * but those are all multiples of 4 long) all goes away, but we 107 * want the *end* of it, which is going to be the start of the IP 108 * header, to be aligned when it gets pulled in. 109 * The beginning of the skb->data is aligned on at least a 4-byte 110 * boundary after allocation. Everything here is aligned at least 111 * on a 2-byte boundary so we can just take hdrlen & 3 and pad by 112 * the result. 113 */ 114 skb_reserve(skb, hdrlen & 3); 115 116 /* If frame is small enough to fit in skb->head, pull it completely. 117 * If not, only pull ieee80211_hdr (including crypto if present, and 118 * an additional 8 bytes for SNAP/ethertype, see below) so that 119 * splice() or TCP coalesce are more efficient. 120 * 121 * Since, in addition, ieee80211_data_to_8023() always pull in at 122 * least 8 bytes (possibly more for mesh) we can do the same here 123 * to save the cost of doing it later. That still doesn't pull in 124 * the actual IP header since the typical case has a SNAP header. 125 * If the latter changes (there are efforts in the standards group 126 * to do so) we should revisit this and ieee80211_data_to_8023(). 127 */ 128 hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8; 129 130 skb_put_data(skb, hdr, hdrlen); 131 fraglen = len - hdrlen; 132 133 if (fraglen) { 134 int offset = (void *)hdr + hdrlen - 135 rxb_addr(rxb) + rxb_offset(rxb); 136 137 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 138 fraglen, rxb->truesize); 139 } 140 141 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 142 } 143 144 /* 145 * iwl_mvm_get_signal_strength - use new rx PHY INFO API 146 * values are reported by the fw as positive values - need to negate 147 * to obtain their dBM. Account for missing antennas by replacing 0 148 * values by -256dBm: practically 0 power and a non-feasible 8 bit value. 149 */ 150 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 151 struct iwl_rx_phy_info *phy_info, 152 struct ieee80211_rx_status *rx_status) 153 { 154 int energy_a, energy_b, energy_c, max_energy; 155 u32 val; 156 157 val = 158 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]); 159 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> 160 IWL_RX_INFO_ENERGY_ANT_A_POS; 161 energy_a = energy_a ? -energy_a : S8_MIN; 162 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> 163 IWL_RX_INFO_ENERGY_ANT_B_POS; 164 energy_b = energy_b ? -energy_b : S8_MIN; 165 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> 166 IWL_RX_INFO_ENERGY_ANT_C_POS; 167 energy_c = energy_c ? -energy_c : S8_MIN; 168 max_energy = max(energy_a, energy_b); 169 max_energy = max(max_energy, energy_c); 170 171 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n", 172 energy_a, energy_b, energy_c, max_energy); 173 174 rx_status->signal = max_energy; 175 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) & 176 RX_RES_PHY_FLAGS_ANTENNA) 177 >> RX_RES_PHY_FLAGS_ANTENNA_POS; 178 rx_status->chain_signal[0] = energy_a; 179 rx_status->chain_signal[1] = energy_b; 180 rx_status->chain_signal[2] = energy_c; 181 } 182 183 /* 184 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format 185 * @mvm: the mvm object 186 * @hdr: 80211 header 187 * @stats: status in mac80211's format 188 * @rx_pkt_status: status coming from fw 189 * 190 * returns non 0 value if the packet should be dropped 191 */ 192 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, 193 struct ieee80211_hdr *hdr, 194 struct ieee80211_rx_status *stats, 195 u32 rx_pkt_status, 196 u8 *crypt_len) 197 { 198 if (!ieee80211_has_protected(hdr->frame_control) || 199 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 200 RX_MPDU_RES_STATUS_SEC_NO_ENC) 201 return 0; 202 203 /* packet was encrypted with unknown alg */ 204 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 205 RX_MPDU_RES_STATUS_SEC_ENC_ERR) 206 return 0; 207 208 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { 209 case RX_MPDU_RES_STATUS_SEC_CCM_ENC: 210 /* alg is CCM: check MIC only */ 211 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 212 return -1; 213 214 stats->flag |= RX_FLAG_DECRYPTED; 215 *crypt_len = IEEE80211_CCMP_HDR_LEN; 216 return 0; 217 218 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: 219 /* Don't drop the frame and decrypt it in SW */ 220 if (!fw_has_api(&mvm->fw->ucode_capa, 221 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 222 !(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) 223 return 0; 224 *crypt_len = IEEE80211_TKIP_IV_LEN; 225 /* fall through */ 226 227 case RX_MPDU_RES_STATUS_SEC_WEP_ENC: 228 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) 229 return -1; 230 231 stats->flag |= RX_FLAG_DECRYPTED; 232 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 233 RX_MPDU_RES_STATUS_SEC_WEP_ENC) 234 *crypt_len = IEEE80211_WEP_IV_LEN; 235 return 0; 236 237 case RX_MPDU_RES_STATUS_SEC_EXT_ENC: 238 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 239 return -1; 240 stats->flag |= RX_FLAG_DECRYPTED; 241 return 0; 242 243 default: 244 /* Expected in monitor (not having the keys) */ 245 if (!mvm->monitor_on) 246 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); 247 } 248 249 return 0; 250 } 251 252 static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm, 253 struct ieee80211_sta *sta, 254 struct ieee80211_hdr *hdr, u32 len, 255 struct iwl_rx_phy_info *phy_info, 256 u32 rate_n_flags) 257 { 258 struct iwl_mvm_sta *mvmsta; 259 struct iwl_mvm_tcm_mac *mdata; 260 int mac; 261 int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */ 262 struct iwl_mvm_vif *mvmvif; 263 /* expected throughput in 100Kbps, single stream, 20 MHz */ 264 static const u8 thresh_tpt[] = { 265 9, 18, 30, 42, 60, 78, 90, 96, 120, 135, 266 }; 267 u16 thr; 268 269 if (ieee80211_is_data_qos(hdr->frame_control)) 270 ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)]; 271 272 mvmsta = iwl_mvm_sta_from_mac80211(sta); 273 mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 274 275 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 276 schedule_delayed_work(&mvm->tcm.work, 0); 277 mdata = &mvm->tcm.data[mac]; 278 mdata->rx.pkts[ac]++; 279 280 /* count the airtime only once for each ampdu */ 281 if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) { 282 mdata->rx.last_ampdu_ref = mvm->ampdu_ref; 283 mdata->rx.airtime += le16_to_cpu(phy_info->frame_time); 284 } 285 286 if (!(rate_n_flags & (RATE_MCS_HT_MSK | RATE_MCS_VHT_MSK))) 287 return; 288 289 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 290 291 if (mdata->opened_rx_ba_sessions || 292 mdata->uapsd_nonagg_detect.detected || 293 (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd && 294 !mvmvif->queue_params[IEEE80211_AC_VI].uapsd && 295 !mvmvif->queue_params[IEEE80211_AC_BE].uapsd && 296 !mvmvif->queue_params[IEEE80211_AC_BK].uapsd) || 297 mvmsta->sta_id != mvmvif->ap_sta_id) 298 return; 299 300 if (rate_n_flags & RATE_MCS_HT_MSK) { 301 thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK]; 302 thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK) >> 303 RATE_HT_MCS_NSS_POS); 304 } else { 305 if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >= 306 ARRAY_SIZE(thresh_tpt))) 307 return; 308 thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK]; 309 thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 310 RATE_VHT_MCS_NSS_POS); 311 } 312 313 thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) >> 314 RATE_MCS_CHAN_WIDTH_POS); 315 316 mdata->uapsd_nonagg_detect.rx_bytes += len; 317 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr); 318 } 319 320 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 321 struct sk_buff *skb, 322 u32 status) 323 { 324 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 325 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 326 327 if (mvmvif->features & NETIF_F_RXCSUM && 328 status & RX_MPDU_RES_STATUS_CSUM_DONE && 329 status & RX_MPDU_RES_STATUS_CSUM_OK) 330 skb->ip_summed = CHECKSUM_UNNECESSARY; 331 } 332 333 /* 334 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 335 * 336 * Handles the actual data of the Rx packet from the fw 337 */ 338 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, 339 struct iwl_rx_cmd_buffer *rxb) 340 { 341 struct ieee80211_hdr *hdr; 342 struct ieee80211_rx_status *rx_status; 343 struct iwl_rx_packet *pkt = rxb_addr(rxb); 344 struct iwl_rx_phy_info *phy_info; 345 struct iwl_rx_mpdu_res_start *rx_res; 346 struct ieee80211_sta *sta = NULL; 347 struct sk_buff *skb; 348 u32 len; 349 u32 rate_n_flags; 350 u32 rx_pkt_status; 351 u8 crypt_len = 0; 352 bool take_ref; 353 354 phy_info = &mvm->last_phy_info; 355 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 356 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 357 len = le16_to_cpu(rx_res->byte_count); 358 rx_pkt_status = le32_to_cpup((__le32 *) 359 (pkt->data + sizeof(*rx_res) + len)); 360 361 /* Dont use dev_alloc_skb(), we'll have enough headroom once 362 * ieee80211_hdr pulled. 363 */ 364 skb = alloc_skb(128, GFP_ATOMIC); 365 if (!skb) { 366 IWL_ERR(mvm, "alloc_skb failed\n"); 367 return; 368 } 369 370 rx_status = IEEE80211_SKB_RXCB(skb); 371 372 /* 373 * drop the packet if it has failed being decrypted by HW 374 */ 375 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, 376 &crypt_len)) { 377 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 378 rx_pkt_status); 379 kfree_skb(skb); 380 return; 381 } 382 383 /* 384 * Keep packets with CRC errors (and with overrun) for monitor mode 385 * (otherwise the firmware discards them) but mark them as bad. 386 */ 387 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 388 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 389 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 390 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 391 } 392 393 /* This will be used in several places later */ 394 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 395 396 /* rx_status carries information about the packet to mac80211 */ 397 rx_status->mactime = le64_to_cpu(phy_info->timestamp); 398 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); 399 rx_status->band = 400 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 401 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 402 rx_status->freq = 403 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 404 rx_status->band); 405 406 /* TSF as indicated by the firmware is at INA time */ 407 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 408 409 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); 410 411 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, 412 (unsigned long long)rx_status->mactime); 413 414 rcu_read_lock(); 415 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { 416 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; 417 418 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; 419 420 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 421 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 422 if (IS_ERR(sta)) 423 sta = NULL; 424 } 425 } else if (!is_multicast_ether_addr(hdr->addr2)) { 426 /* This is fine since we prevent two stations with the same 427 * address from being added. 428 */ 429 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 430 } 431 432 if (sta) { 433 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 434 struct ieee80211_vif *tx_blocked_vif = 435 rcu_dereference(mvm->csa_tx_blocked_vif); 436 struct iwl_fw_dbg_trigger_tlv *trig; 437 struct ieee80211_vif *vif = mvmsta->vif; 438 439 /* We have tx blocked stations (with CS bit). If we heard 440 * frames from a blocked station on a new channel we can 441 * TX to it again. 442 */ 443 if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) { 444 struct iwl_mvm_vif *mvmvif = 445 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 446 447 if (mvmvif->csa_target_freq == rx_status->freq) 448 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 449 false); 450 } 451 452 rs_update_last_rssi(mvm, mvmsta, rx_status); 453 454 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 455 ieee80211_vif_to_wdev(vif), 456 FW_DBG_TRIGGER_RSSI); 457 458 if (trig && ieee80211_is_beacon(hdr->frame_control)) { 459 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 460 s32 rssi; 461 462 rssi_trig = (void *)trig->data; 463 rssi = le32_to_cpu(rssi_trig->rssi); 464 465 if (rx_status->signal < rssi) 466 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 467 NULL); 468 } 469 470 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 471 !is_multicast_ether_addr(hdr->addr1) && 472 ieee80211_is_data(hdr->frame_control)) 473 iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info, 474 rate_n_flags); 475 476 if (ieee80211_is_data(hdr->frame_control)) 477 iwl_mvm_rx_csum(sta, skb, rx_pkt_status); 478 } 479 rcu_read_unlock(); 480 481 /* set the preamble flag if appropriate */ 482 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 483 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 484 485 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 486 /* 487 * We know which subframes of an A-MPDU belong 488 * together since we get a single PHY response 489 * from the firmware for all of them 490 */ 491 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 492 rx_status->ampdu_reference = mvm->ampdu_ref; 493 } 494 495 /* Set up the HT phy flags */ 496 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 497 case RATE_MCS_CHAN_WIDTH_20: 498 break; 499 case RATE_MCS_CHAN_WIDTH_40: 500 rx_status->bw = RATE_INFO_BW_40; 501 break; 502 case RATE_MCS_CHAN_WIDTH_80: 503 rx_status->bw = RATE_INFO_BW_80; 504 break; 505 case RATE_MCS_CHAN_WIDTH_160: 506 rx_status->bw = RATE_INFO_BW_160; 507 break; 508 } 509 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 510 rate_n_flags & RATE_MCS_SGI_MSK) 511 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 512 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 513 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 514 if (rate_n_flags & RATE_MCS_LDPC_MSK) 515 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 516 if (rate_n_flags & RATE_MCS_HT_MSK) { 517 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 518 RATE_MCS_STBC_POS; 519 rx_status->encoding = RX_ENC_HT; 520 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 521 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 522 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 523 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 524 RATE_MCS_STBC_POS; 525 rx_status->nss = 526 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 527 RATE_VHT_MCS_NSS_POS) + 1; 528 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 529 rx_status->encoding = RX_ENC_VHT; 530 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 531 if (rate_n_flags & RATE_MCS_BF_MSK) 532 rx_status->enc_flags |= RX_ENC_FLAG_BF; 533 } else { 534 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 535 rx_status->band); 536 537 if (WARN(rate < 0 || rate > 0xFF, 538 "Invalid rate flags 0x%x, band %d,\n", 539 rate_n_flags, rx_status->band)) { 540 kfree_skb(skb); 541 return; 542 } 543 rx_status->rate_idx = rate; 544 } 545 546 #ifdef CONFIG_IWLWIFI_DEBUGFS 547 iwl_mvm_update_frame_stats(mvm, rate_n_flags, 548 rx_status->flag & RX_FLAG_AMPDU_DETAILS); 549 #endif 550 551 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 552 ieee80211_is_probe_resp(hdr->frame_control)) && 553 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) 554 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 555 556 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 557 ieee80211_is_probe_resp(hdr->frame_control))) 558 rx_status->boottime_ns = ktime_get_boot_ns(); 559 560 /* Take a reference briefly to kick off a d0i3 entry delay so 561 * we can handle bursts of RX packets without toggling the 562 * state too often. But don't do this for beacons if we are 563 * going to idle because the beacon filtering changes we make 564 * cause the firmware to send us collateral beacons. */ 565 take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) && 566 ieee80211_is_beacon(hdr->frame_control)); 567 568 if (take_ref) 569 iwl_mvm_ref(mvm, IWL_MVM_REF_RX); 570 571 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, 572 crypt_len, rxb); 573 574 if (take_ref) 575 iwl_mvm_unref(mvm, IWL_MVM_REF_RX); 576 } 577 578 struct iwl_mvm_stat_data { 579 struct iwl_mvm *mvm; 580 __le32 mac_id; 581 u8 beacon_filter_average_energy; 582 void *general; 583 }; 584 585 static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 586 struct ieee80211_vif *vif) 587 { 588 struct iwl_mvm_stat_data *data = _data; 589 struct iwl_mvm *mvm = data->mvm; 590 int sig = -data->beacon_filter_average_energy; 591 int last_event; 592 int thold = vif->bss_conf.cqm_rssi_thold; 593 int hyst = vif->bss_conf.cqm_rssi_hyst; 594 u16 id = le32_to_cpu(data->mac_id); 595 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 596 u16 vif_id = mvmvif->id; 597 598 /* This doesn't need the MAC ID check since it's not taking the 599 * data copied into the "data" struct, but rather the data from 600 * the notification directly. 601 */ 602 if (iwl_mvm_has_new_rx_stats_api(mvm)) { 603 struct mvm_statistics_general *general = 604 data->general; 605 606 mvmvif->beacon_stats.num_beacons = 607 le32_to_cpu(general->beacon_counter[vif_id]); 608 mvmvif->beacon_stats.avg_signal = 609 -general->beacon_average_energy[vif_id]; 610 } else { 611 struct mvm_statistics_general_v8 *general = 612 data->general; 613 614 mvmvif->beacon_stats.num_beacons = 615 le32_to_cpu(general->beacon_counter[vif_id]); 616 mvmvif->beacon_stats.avg_signal = 617 -general->beacon_average_energy[vif_id]; 618 } 619 620 if (mvmvif->id != id) 621 return; 622 623 if (vif->type != NL80211_IFTYPE_STATION) 624 return; 625 626 if (sig == 0) { 627 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); 628 return; 629 } 630 631 mvmvif->bf_data.ave_beacon_signal = sig; 632 633 /* BT Coex */ 634 if (mvmvif->bf_data.bt_coex_min_thold != 635 mvmvif->bf_data.bt_coex_max_thold) { 636 last_event = mvmvif->bf_data.last_bt_coex_event; 637 if (sig > mvmvif->bf_data.bt_coex_max_thold && 638 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 639 last_event == 0)) { 640 mvmvif->bf_data.last_bt_coex_event = sig; 641 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 642 sig); 643 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 644 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 645 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 646 last_event == 0)) { 647 mvmvif->bf_data.last_bt_coex_event = sig; 648 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 649 sig); 650 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 651 } 652 } 653 654 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 655 return; 656 657 /* CQM Notification */ 658 last_event = mvmvif->bf_data.last_cqm_event; 659 if (thold && sig < thold && (last_event == 0 || 660 sig < last_event - hyst)) { 661 mvmvif->bf_data.last_cqm_event = sig; 662 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 663 sig); 664 ieee80211_cqm_rssi_notify( 665 vif, 666 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 667 sig, 668 GFP_KERNEL); 669 } else if (sig > thold && 670 (last_event == 0 || sig > last_event + hyst)) { 671 mvmvif->bf_data.last_cqm_event = sig; 672 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 673 sig); 674 ieee80211_cqm_rssi_notify( 675 vif, 676 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 677 sig, 678 GFP_KERNEL); 679 } 680 } 681 682 static inline void 683 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) 684 { 685 struct iwl_fw_dbg_trigger_tlv *trig; 686 struct iwl_fw_dbg_trigger_stats *trig_stats; 687 u32 trig_offset, trig_thold; 688 689 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS); 690 if (!trig) 691 return; 692 693 trig_stats = (void *)trig->data; 694 695 trig_offset = le32_to_cpu(trig_stats->stop_offset); 696 trig_thold = le32_to_cpu(trig_stats->stop_threshold); 697 698 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) 699 return; 700 701 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) 702 return; 703 704 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL); 705 } 706 707 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, 708 struct iwl_rx_packet *pkt) 709 { 710 struct iwl_mvm_stat_data data = { 711 .mvm = mvm, 712 }; 713 int expected_size; 714 int i; 715 u8 *energy; 716 __le32 *bytes; 717 __le32 *air_time; 718 __le32 flags; 719 720 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 721 if (iwl_mvm_has_new_rx_api(mvm)) 722 expected_size = sizeof(struct iwl_notif_statistics_v11); 723 else 724 expected_size = sizeof(struct iwl_notif_statistics_v10); 725 } else { 726 expected_size = sizeof(struct iwl_notif_statistics); 727 } 728 729 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size, 730 "received invalid statistics size (%d)!\n", 731 iwl_rx_packet_payload_len(pkt))) 732 return; 733 734 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 735 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data; 736 737 data.mac_id = stats->rx.general.mac_id; 738 data.beacon_filter_average_energy = 739 stats->general.common.beacon_filter_average_energy; 740 741 mvm->rx_stats_v3 = stats->rx; 742 743 mvm->radio_stats.rx_time = 744 le64_to_cpu(stats->general.common.rx_time); 745 mvm->radio_stats.tx_time = 746 le64_to_cpu(stats->general.common.tx_time); 747 mvm->radio_stats.on_time_rf = 748 le64_to_cpu(stats->general.common.on_time_rf); 749 mvm->radio_stats.on_time_scan = 750 le64_to_cpu(stats->general.common.on_time_scan); 751 752 data.general = &stats->general; 753 754 flags = stats->flag; 755 } else { 756 struct iwl_notif_statistics *stats = (void *)&pkt->data; 757 758 data.mac_id = stats->rx.general.mac_id; 759 data.beacon_filter_average_energy = 760 stats->general.common.beacon_filter_average_energy; 761 762 mvm->rx_stats = stats->rx; 763 764 mvm->radio_stats.rx_time = 765 le64_to_cpu(stats->general.common.rx_time); 766 mvm->radio_stats.tx_time = 767 le64_to_cpu(stats->general.common.tx_time); 768 mvm->radio_stats.on_time_rf = 769 le64_to_cpu(stats->general.common.on_time_rf); 770 mvm->radio_stats.on_time_scan = 771 le64_to_cpu(stats->general.common.on_time_scan); 772 773 data.general = &stats->general; 774 775 flags = stats->flag; 776 } 777 778 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 779 780 ieee80211_iterate_active_interfaces(mvm->hw, 781 IEEE80211_IFACE_ITER_NORMAL, 782 iwl_mvm_stat_iterator, 783 &data); 784 785 if (!iwl_mvm_has_new_rx_api(mvm)) 786 return; 787 788 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 789 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data; 790 791 energy = (void *)&v11->load_stats.avg_energy; 792 bytes = (void *)&v11->load_stats.byte_count; 793 air_time = (void *)&v11->load_stats.air_time; 794 } else { 795 struct iwl_notif_statistics *stats = (void *)&pkt->data; 796 797 energy = (void *)&stats->load_stats.avg_energy; 798 bytes = (void *)&stats->load_stats.byte_count; 799 air_time = (void *)&stats->load_stats.air_time; 800 } 801 802 rcu_read_lock(); 803 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 804 struct iwl_mvm_sta *sta; 805 806 if (!energy[i]) 807 continue; 808 809 sta = iwl_mvm_sta_from_staid_rcu(mvm, i); 810 if (!sta) 811 continue; 812 sta->avg_energy = energy[i]; 813 } 814 rcu_read_unlock(); 815 816 /* 817 * Don't update in case the statistics are not cleared, since 818 * we will end up counting twice the same airtime, once in TCM 819 * request and once in statistics notification. 820 */ 821 if (!(le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)) 822 return; 823 824 spin_lock(&mvm->tcm.lock); 825 for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) { 826 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i]; 827 u32 airtime = le32_to_cpu(air_time[i]); 828 u32 rx_bytes = le32_to_cpu(bytes[i]); 829 830 mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes; 831 if (airtime) { 832 /* re-init every time to store rate from FW */ 833 ewma_rate_init(&mdata->uapsd_nonagg_detect.rate); 834 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, 835 rx_bytes * 8 / airtime); 836 } 837 838 mdata->rx.airtime += airtime; 839 } 840 spin_unlock(&mvm->tcm.lock); 841 } 842 843 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 844 { 845 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); 846 } 847 848 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, 849 struct iwl_rx_cmd_buffer *rxb) 850 { 851 struct iwl_rx_packet *pkt = rxb_addr(rxb); 852 struct iwl_ba_window_status_notif *notif = (void *)pkt->data; 853 int i; 854 u32 pkt_len = iwl_rx_packet_payload_len(pkt); 855 856 if (WARN_ONCE(pkt_len != sizeof(*notif), 857 "Received window status notification of wrong size (%u)\n", 858 pkt_len)) 859 return; 860 861 rcu_read_lock(); 862 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { 863 struct ieee80211_sta *sta; 864 u8 sta_id, tid; 865 u64 bitmap; 866 u32 ssn; 867 u16 ratid; 868 u16 received_mpdu; 869 870 ratid = le16_to_cpu(notif->ra_tid[i]); 871 /* check that this TID is valid */ 872 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) 873 continue; 874 875 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); 876 if (received_mpdu == 0) 877 continue; 878 879 tid = ratid & BA_WINDOW_STATUS_TID_MSK; 880 /* get the station */ 881 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) 882 >> BA_WINDOW_STATUS_STA_ID_POS; 883 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 884 if (IS_ERR_OR_NULL(sta)) 885 continue; 886 bitmap = le64_to_cpu(notif->bitmap[i]); 887 ssn = le32_to_cpu(notif->start_seq_num[i]); 888 889 /* update mac80211 with the bitmap for the reordering buffer */ 890 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, 891 received_mpdu); 892 } 893 rcu_read_unlock(); 894 } 895