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 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 37 * All rights reserved. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 43 * * Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * * Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in 47 * the documentation and/or other materials provided with the 48 * distribution. 49 * * Neither the name Intel Corporation nor the names of its 50 * contributors may be used to endorse or promote products derived 51 * from this software without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 54 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 55 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 56 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 57 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 58 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 59 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 63 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 64 *****************************************************************************/ 65 #include <linux/etherdevice.h> 66 #include <linux/skbuff.h> 67 #include "iwl-trans.h" 68 #include "mvm.h" 69 #include "fw-api.h" 70 71 /* 72 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler 73 * 74 * Copies the phy information in mvm->last_phy_info, it will be used when the 75 * actual data will come from the fw in the next packet. 76 */ 77 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 78 { 79 struct iwl_rx_packet *pkt = rxb_addr(rxb); 80 81 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info)); 82 mvm->ampdu_ref++; 83 84 #ifdef CONFIG_IWLWIFI_DEBUGFS 85 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 86 spin_lock(&mvm->drv_stats_lock); 87 mvm->drv_rx_stats.ampdu_count++; 88 spin_unlock(&mvm->drv_stats_lock); 89 } 90 #endif 91 } 92 93 /* 94 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211 95 * 96 * Adds the rxb to a new skb and give it to mac80211 97 */ 98 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 99 struct ieee80211_sta *sta, 100 struct napi_struct *napi, 101 struct sk_buff *skb, 102 struct ieee80211_hdr *hdr, u16 len, 103 u8 crypt_len, 104 struct iwl_rx_cmd_buffer *rxb) 105 { 106 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); 107 unsigned int fraglen; 108 109 /* 110 * The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len, 111 * but those are all multiples of 4 long) all goes away, but we 112 * want the *end* of it, which is going to be the start of the IP 113 * header, to be aligned when it gets pulled in. 114 * The beginning of the skb->data is aligned on at least a 4-byte 115 * boundary after allocation. Everything here is aligned at least 116 * on a 2-byte boundary so we can just take hdrlen & 3 and pad by 117 * the result. 118 */ 119 skb_reserve(skb, hdrlen & 3); 120 121 /* If frame is small enough to fit in skb->head, pull it completely. 122 * If not, only pull ieee80211_hdr (including crypto if present, and 123 * an additional 8 bytes for SNAP/ethertype, see below) so that 124 * splice() or TCP coalesce are more efficient. 125 * 126 * Since, in addition, ieee80211_data_to_8023() always pull in at 127 * least 8 bytes (possibly more for mesh) we can do the same here 128 * to save the cost of doing it later. That still doesn't pull in 129 * the actual IP header since the typical case has a SNAP header. 130 * If the latter changes (there are efforts in the standards group 131 * to do so) we should revisit this and ieee80211_data_to_8023(). 132 */ 133 hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8; 134 135 skb_put_data(skb, hdr, hdrlen); 136 fraglen = len - hdrlen; 137 138 if (fraglen) { 139 int offset = (void *)hdr + hdrlen - 140 rxb_addr(rxb) + rxb_offset(rxb); 141 142 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 143 fraglen, rxb->truesize); 144 } 145 146 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 147 } 148 149 /* 150 * iwl_mvm_get_signal_strength - use new rx PHY INFO API 151 * values are reported by the fw as positive values - need to negate 152 * to obtain their dBM. Account for missing antennas by replacing 0 153 * values by -256dBm: practically 0 power and a non-feasible 8 bit value. 154 */ 155 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 156 struct iwl_rx_phy_info *phy_info, 157 struct ieee80211_rx_status *rx_status) 158 { 159 int energy_a, energy_b, energy_c, max_energy; 160 u32 val; 161 162 val = 163 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]); 164 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> 165 IWL_RX_INFO_ENERGY_ANT_A_POS; 166 energy_a = energy_a ? -energy_a : S8_MIN; 167 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> 168 IWL_RX_INFO_ENERGY_ANT_B_POS; 169 energy_b = energy_b ? -energy_b : S8_MIN; 170 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> 171 IWL_RX_INFO_ENERGY_ANT_C_POS; 172 energy_c = energy_c ? -energy_c : S8_MIN; 173 max_energy = max(energy_a, energy_b); 174 max_energy = max(max_energy, energy_c); 175 176 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n", 177 energy_a, energy_b, energy_c, max_energy); 178 179 rx_status->signal = max_energy; 180 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) & 181 RX_RES_PHY_FLAGS_ANTENNA) 182 >> RX_RES_PHY_FLAGS_ANTENNA_POS; 183 rx_status->chain_signal[0] = energy_a; 184 rx_status->chain_signal[1] = energy_b; 185 rx_status->chain_signal[2] = energy_c; 186 } 187 188 /* 189 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format 190 * @mvm: the mvm object 191 * @hdr: 80211 header 192 * @stats: status in mac80211's format 193 * @rx_pkt_status: status coming from fw 194 * 195 * returns non 0 value if the packet should be dropped 196 */ 197 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, 198 struct ieee80211_hdr *hdr, 199 struct ieee80211_rx_status *stats, 200 u32 rx_pkt_status, 201 u8 *crypt_len) 202 { 203 if (!ieee80211_has_protected(hdr->frame_control) || 204 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 205 RX_MPDU_RES_STATUS_SEC_NO_ENC) 206 return 0; 207 208 /* packet was encrypted with unknown alg */ 209 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 210 RX_MPDU_RES_STATUS_SEC_ENC_ERR) 211 return 0; 212 213 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { 214 case RX_MPDU_RES_STATUS_SEC_CCM_ENC: 215 /* alg is CCM: check MIC only */ 216 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 217 return -1; 218 219 stats->flag |= RX_FLAG_DECRYPTED; 220 *crypt_len = IEEE80211_CCMP_HDR_LEN; 221 return 0; 222 223 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: 224 /* Don't drop the frame and decrypt it in SW */ 225 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) 226 return 0; 227 *crypt_len = IEEE80211_TKIP_IV_LEN; 228 /* fall through if TTAK OK */ 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_csum(struct ieee80211_sta *sta, 256 struct sk_buff *skb, 257 u32 status) 258 { 259 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 260 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 261 262 if (mvmvif->features & NETIF_F_RXCSUM && 263 status & RX_MPDU_RES_STATUS_CSUM_DONE && 264 status & RX_MPDU_RES_STATUS_CSUM_OK) 265 skb->ip_summed = CHECKSUM_UNNECESSARY; 266 } 267 268 /* 269 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 270 * 271 * Handles the actual data of the Rx packet from the fw 272 */ 273 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, 274 struct iwl_rx_cmd_buffer *rxb) 275 { 276 struct ieee80211_hdr *hdr; 277 struct ieee80211_rx_status *rx_status; 278 struct iwl_rx_packet *pkt = rxb_addr(rxb); 279 struct iwl_rx_phy_info *phy_info; 280 struct iwl_rx_mpdu_res_start *rx_res; 281 struct ieee80211_sta *sta = NULL; 282 struct sk_buff *skb; 283 u32 len; 284 u32 rate_n_flags; 285 u32 rx_pkt_status; 286 u8 crypt_len = 0; 287 bool take_ref; 288 289 phy_info = &mvm->last_phy_info; 290 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 291 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 292 len = le16_to_cpu(rx_res->byte_count); 293 rx_pkt_status = le32_to_cpup((__le32 *) 294 (pkt->data + sizeof(*rx_res) + len)); 295 296 /* Dont use dev_alloc_skb(), we'll have enough headroom once 297 * ieee80211_hdr pulled. 298 */ 299 skb = alloc_skb(128, GFP_ATOMIC); 300 if (!skb) { 301 IWL_ERR(mvm, "alloc_skb failed\n"); 302 return; 303 } 304 305 rx_status = IEEE80211_SKB_RXCB(skb); 306 307 /* 308 * drop the packet if it has failed being decrypted by HW 309 */ 310 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, 311 &crypt_len)) { 312 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 313 rx_pkt_status); 314 kfree_skb(skb); 315 return; 316 } 317 318 /* 319 * Keep packets with CRC errors (and with overrun) for monitor mode 320 * (otherwise the firmware discards them) but mark them as bad. 321 */ 322 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 323 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 324 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 325 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 326 } 327 328 /* This will be used in several places later */ 329 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 330 331 /* rx_status carries information about the packet to mac80211 */ 332 rx_status->mactime = le64_to_cpu(phy_info->timestamp); 333 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); 334 rx_status->band = 335 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 336 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 337 rx_status->freq = 338 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 339 rx_status->band); 340 341 /* TSF as indicated by the firmware is at INA time */ 342 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 343 344 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); 345 346 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, 347 (unsigned long long)rx_status->mactime); 348 349 rcu_read_lock(); 350 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { 351 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; 352 353 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; 354 355 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 356 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 357 if (IS_ERR(sta)) 358 sta = NULL; 359 } 360 } else if (!is_multicast_ether_addr(hdr->addr2)) { 361 /* This is fine since we prevent two stations with the same 362 * address from being added. 363 */ 364 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 365 } 366 367 if (sta) { 368 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 369 struct ieee80211_vif *tx_blocked_vif = 370 rcu_dereference(mvm->csa_tx_blocked_vif); 371 372 /* We have tx blocked stations (with CS bit). If we heard 373 * frames from a blocked station on a new channel we can 374 * TX to it again. 375 */ 376 if (unlikely(tx_blocked_vif) && 377 mvmsta->vif == tx_blocked_vif) { 378 struct iwl_mvm_vif *mvmvif = 379 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 380 381 if (mvmvif->csa_target_freq == rx_status->freq) 382 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 383 false); 384 } 385 386 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status); 387 388 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && 389 ieee80211_is_beacon(hdr->frame_control)) { 390 struct iwl_fw_dbg_trigger_tlv *trig; 391 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 392 bool trig_check; 393 s32 rssi; 394 395 trig = iwl_fw_dbg_get_trigger(mvm->fw, 396 FW_DBG_TRIGGER_RSSI); 397 rssi_trig = (void *)trig->data; 398 rssi = le32_to_cpu(rssi_trig->rssi); 399 400 trig_check = 401 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 402 ieee80211_vif_to_wdev(mvmsta->vif), 403 trig); 404 if (trig_check && rx_status->signal < rssi) 405 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 406 NULL); 407 } 408 409 if (ieee80211_is_data(hdr->frame_control)) 410 iwl_mvm_rx_csum(sta, skb, rx_pkt_status); 411 } 412 rcu_read_unlock(); 413 414 /* set the preamble flag if appropriate */ 415 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 416 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 417 418 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 419 /* 420 * We know which subframes of an A-MPDU belong 421 * together since we get a single PHY response 422 * from the firmware for all of them 423 */ 424 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 425 rx_status->ampdu_reference = mvm->ampdu_ref; 426 } 427 428 /* Set up the HT phy flags */ 429 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 430 case RATE_MCS_CHAN_WIDTH_20: 431 break; 432 case RATE_MCS_CHAN_WIDTH_40: 433 rx_status->bw = RATE_INFO_BW_40; 434 break; 435 case RATE_MCS_CHAN_WIDTH_80: 436 rx_status->bw = RATE_INFO_BW_80; 437 break; 438 case RATE_MCS_CHAN_WIDTH_160: 439 rx_status->bw = RATE_INFO_BW_160; 440 break; 441 } 442 if (rate_n_flags & RATE_MCS_SGI_MSK) 443 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 444 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 445 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 446 if (rate_n_flags & RATE_MCS_LDPC_MSK) 447 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 448 if (rate_n_flags & RATE_MCS_HT_MSK) { 449 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 450 RATE_MCS_STBC_POS; 451 rx_status->encoding = RX_ENC_HT; 452 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 453 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 454 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 455 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 456 RATE_MCS_STBC_POS; 457 rx_status->nss = 458 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 459 RATE_VHT_MCS_NSS_POS) + 1; 460 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 461 rx_status->encoding = RX_ENC_VHT; 462 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 463 if (rate_n_flags & RATE_MCS_BF_MSK) 464 rx_status->enc_flags |= RX_ENC_FLAG_BF; 465 } else { 466 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 467 rx_status->band); 468 469 if (WARN(rate < 0 || rate > 0xFF, 470 "Invalid rate flags 0x%x, band %d,\n", 471 rate_n_flags, rx_status->band)) { 472 kfree_skb(skb); 473 return; 474 } 475 rx_status->rate_idx = rate; 476 } 477 478 #ifdef CONFIG_IWLWIFI_DEBUGFS 479 iwl_mvm_update_frame_stats(mvm, rate_n_flags, 480 rx_status->flag & RX_FLAG_AMPDU_DETAILS); 481 #endif 482 483 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 484 ieee80211_is_probe_resp(hdr->frame_control)) && 485 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) 486 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 487 488 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 489 ieee80211_is_probe_resp(hdr->frame_control))) 490 rx_status->boottime_ns = ktime_get_boot_ns(); 491 492 /* Take a reference briefly to kick off a d0i3 entry delay so 493 * we can handle bursts of RX packets without toggling the 494 * state too often. But don't do this for beacons if we are 495 * going to idle because the beacon filtering changes we make 496 * cause the firmware to send us collateral beacons. */ 497 take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) && 498 ieee80211_is_beacon(hdr->frame_control)); 499 500 if (take_ref) 501 iwl_mvm_ref(mvm, IWL_MVM_REF_RX); 502 503 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, 504 crypt_len, rxb); 505 506 if (take_ref) 507 iwl_mvm_unref(mvm, IWL_MVM_REF_RX); 508 } 509 510 struct iwl_mvm_stat_data { 511 struct iwl_mvm *mvm; 512 __le32 mac_id; 513 u8 beacon_filter_average_energy; 514 void *general; 515 }; 516 517 static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 518 struct ieee80211_vif *vif) 519 { 520 struct iwl_mvm_stat_data *data = _data; 521 struct iwl_mvm *mvm = data->mvm; 522 int sig = -data->beacon_filter_average_energy; 523 int last_event; 524 int thold = vif->bss_conf.cqm_rssi_thold; 525 int hyst = vif->bss_conf.cqm_rssi_hyst; 526 u16 id = le32_to_cpu(data->mac_id); 527 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 528 529 /* This doesn't need the MAC ID check since it's not taking the 530 * data copied into the "data" struct, but rather the data from 531 * the notification directly. 532 */ 533 if (data->general) { 534 u16 vif_id = mvmvif->id; 535 536 if (iwl_mvm_is_cdb_supported(mvm)) { 537 struct mvm_statistics_general_cdb *general = 538 data->general; 539 540 mvmvif->beacon_stats.num_beacons = 541 le32_to_cpu(general->beacon_counter[vif_id]); 542 mvmvif->beacon_stats.avg_signal = 543 -general->beacon_average_energy[vif_id]; 544 } else { 545 struct mvm_statistics_general_v8 *general = 546 data->general; 547 548 mvmvif->beacon_stats.num_beacons = 549 le32_to_cpu(general->beacon_counter[vif_id]); 550 mvmvif->beacon_stats.avg_signal = 551 -general->beacon_average_energy[vif_id]; 552 } 553 } 554 555 if (mvmvif->id != id) 556 return; 557 558 if (vif->type != NL80211_IFTYPE_STATION) 559 return; 560 561 if (sig == 0) { 562 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); 563 return; 564 } 565 566 mvmvif->bf_data.ave_beacon_signal = sig; 567 568 /* BT Coex */ 569 if (mvmvif->bf_data.bt_coex_min_thold != 570 mvmvif->bf_data.bt_coex_max_thold) { 571 last_event = mvmvif->bf_data.last_bt_coex_event; 572 if (sig > mvmvif->bf_data.bt_coex_max_thold && 573 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 574 last_event == 0)) { 575 mvmvif->bf_data.last_bt_coex_event = sig; 576 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 577 sig); 578 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 579 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 580 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 581 last_event == 0)) { 582 mvmvif->bf_data.last_bt_coex_event = sig; 583 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 584 sig); 585 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 586 } 587 } 588 589 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 590 return; 591 592 /* CQM Notification */ 593 last_event = mvmvif->bf_data.last_cqm_event; 594 if (thold && sig < thold && (last_event == 0 || 595 sig < last_event - hyst)) { 596 mvmvif->bf_data.last_cqm_event = sig; 597 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 598 sig); 599 ieee80211_cqm_rssi_notify( 600 vif, 601 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 602 sig, 603 GFP_KERNEL); 604 } else if (sig > thold && 605 (last_event == 0 || sig > last_event + hyst)) { 606 mvmvif->bf_data.last_cqm_event = sig; 607 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 608 sig); 609 ieee80211_cqm_rssi_notify( 610 vif, 611 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 612 sig, 613 GFP_KERNEL); 614 } 615 } 616 617 static inline void 618 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) 619 { 620 struct iwl_fw_dbg_trigger_tlv *trig; 621 struct iwl_fw_dbg_trigger_stats *trig_stats; 622 u32 trig_offset, trig_thold; 623 624 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS)) 625 return; 626 627 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS); 628 trig_stats = (void *)trig->data; 629 630 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig)) 631 return; 632 633 trig_offset = le32_to_cpu(trig_stats->stop_offset); 634 trig_thold = le32_to_cpu(trig_stats->stop_threshold); 635 636 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) 637 return; 638 639 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) 640 return; 641 642 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL); 643 } 644 645 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, 646 struct iwl_rx_packet *pkt) 647 { 648 struct iwl_mvm_stat_data data = { 649 .mvm = mvm, 650 }; 651 int expected_size; 652 int i; 653 u8 *energy; 654 __le32 *bytes, *air_time; 655 __le32 flags; 656 657 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 658 if (iwl_mvm_has_new_rx_api(mvm)) 659 expected_size = sizeof(struct iwl_notif_statistics_v11); 660 else 661 expected_size = sizeof(struct iwl_notif_statistics_v10); 662 } else { 663 expected_size = sizeof(struct iwl_notif_statistics_cdb); 664 } 665 666 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size, 667 "received invalid statistics size (%d)!\n", 668 iwl_rx_packet_payload_len(pkt))) 669 return; 670 671 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 672 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data; 673 674 data.mac_id = stats->rx.general.mac_id; 675 data.beacon_filter_average_energy = 676 stats->general.common.beacon_filter_average_energy; 677 678 mvm->rx_stats_v3 = stats->rx; 679 680 mvm->radio_stats.rx_time = 681 le64_to_cpu(stats->general.common.rx_time); 682 mvm->radio_stats.tx_time = 683 le64_to_cpu(stats->general.common.tx_time); 684 mvm->radio_stats.on_time_rf = 685 le64_to_cpu(stats->general.common.on_time_rf); 686 mvm->radio_stats.on_time_scan = 687 le64_to_cpu(stats->general.common.on_time_scan); 688 689 data.general = &stats->general; 690 691 flags = stats->flag; 692 } else { 693 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data; 694 695 data.mac_id = stats->rx.general.mac_id; 696 data.beacon_filter_average_energy = 697 stats->general.common.beacon_filter_average_energy; 698 699 mvm->rx_stats = stats->rx; 700 701 mvm->radio_stats.rx_time = 702 le64_to_cpu(stats->general.common.rx_time); 703 mvm->radio_stats.tx_time = 704 le64_to_cpu(stats->general.common.tx_time); 705 mvm->radio_stats.on_time_rf = 706 le64_to_cpu(stats->general.common.on_time_rf); 707 mvm->radio_stats.on_time_scan = 708 le64_to_cpu(stats->general.common.on_time_scan); 709 710 data.general = &stats->general; 711 712 flags = stats->flag; 713 } 714 715 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 716 717 ieee80211_iterate_active_interfaces(mvm->hw, 718 IEEE80211_IFACE_ITER_NORMAL, 719 iwl_mvm_stat_iterator, 720 &data); 721 722 if (!iwl_mvm_has_new_rx_api(mvm)) 723 return; 724 725 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 726 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data; 727 728 energy = (void *)&v11->load_stats.avg_energy; 729 bytes = (void *)&v11->load_stats.byte_count; 730 air_time = (void *)&v11->load_stats.air_time; 731 } else { 732 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data; 733 734 energy = (void *)&stats->load_stats.avg_energy; 735 bytes = (void *)&stats->load_stats.byte_count; 736 air_time = (void *)&stats->load_stats.air_time; 737 } 738 739 rcu_read_lock(); 740 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 741 struct iwl_mvm_sta *sta; 742 743 if (!energy[i]) 744 continue; 745 746 sta = iwl_mvm_sta_from_staid_rcu(mvm, i); 747 if (!sta) 748 continue; 749 sta->avg_energy = energy[i]; 750 } 751 rcu_read_unlock(); 752 } 753 754 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 755 { 756 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); 757 } 758 759 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, 760 struct iwl_rx_cmd_buffer *rxb) 761 { 762 struct iwl_rx_packet *pkt = rxb_addr(rxb); 763 struct iwl_ba_window_status_notif *notif = (void *)pkt->data; 764 int i; 765 u32 pkt_len = iwl_rx_packet_payload_len(pkt); 766 767 if (WARN_ONCE(pkt_len != sizeof(*notif), 768 "Received window status notification of wrong size (%u)\n", 769 pkt_len)) 770 return; 771 772 rcu_read_lock(); 773 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { 774 struct ieee80211_sta *sta; 775 u8 sta_id, tid; 776 u64 bitmap; 777 u32 ssn; 778 u16 ratid; 779 u16 received_mpdu; 780 781 ratid = le16_to_cpu(notif->ra_tid[i]); 782 /* check that this TID is valid */ 783 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) 784 continue; 785 786 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); 787 if (received_mpdu == 0) 788 continue; 789 790 tid = ratid & BA_WINDOW_STATUS_TID_MSK; 791 /* get the station */ 792 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) 793 >> BA_WINDOW_STATUS_STA_ID_POS; 794 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 795 if (IS_ERR_OR_NULL(sta)) 796 continue; 797 bitmap = le64_to_cpu(notif->bitmap[i]); 798 ssn = le32_to_cpu(notif->start_seq_num[i]); 799 800 /* update mac80211 with the bitmap for the reordering buffer */ 801 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, 802 received_mpdu); 803 } 804 rcu_read_unlock(); 805 } 806