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 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 #include "fw-dbg.h" 71 72 /* 73 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler 74 * 75 * Copies the phy information in mvm->last_phy_info, it will be used when the 76 * actual data will come from the fw in the next packet. 77 */ 78 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 79 { 80 struct iwl_rx_packet *pkt = rxb_addr(rxb); 81 82 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info)); 83 mvm->ampdu_ref++; 84 85 #ifdef CONFIG_IWLWIFI_DEBUGFS 86 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 87 spin_lock(&mvm->drv_stats_lock); 88 mvm->drv_rx_stats.ampdu_count++; 89 spin_unlock(&mvm->drv_stats_lock); 90 } 91 #endif 92 } 93 94 /* 95 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211 96 * 97 * Adds the rxb to a new skb and give it to mac80211 98 */ 99 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 100 struct ieee80211_sta *sta, 101 struct napi_struct *napi, 102 struct sk_buff *skb, 103 struct ieee80211_hdr *hdr, u16 len, 104 u8 crypt_len, 105 struct iwl_rx_cmd_buffer *rxb) 106 { 107 unsigned int hdrlen, fraglen; 108 109 /* If frame is small enough to fit in skb->head, pull it completely. 110 * If not, only pull ieee80211_hdr (including crypto if present, and 111 * an additional 8 bytes for SNAP/ethertype, see below) so that 112 * splice() or TCP coalesce are more efficient. 113 * 114 * Since, in addition, ieee80211_data_to_8023() always pull in at 115 * least 8 bytes (possibly more for mesh) we can do the same here 116 * to save the cost of doing it later. That still doesn't pull in 117 * the actual IP header since the typical case has a SNAP header. 118 * If the latter changes (there are efforts in the standards group 119 * to do so) we should revisit this and ieee80211_data_to_8023(). 120 */ 121 hdrlen = (len <= skb_tailroom(skb)) ? len : 122 sizeof(*hdr) + crypt_len + 8; 123 124 memcpy(skb_put(skb, hdrlen), hdr, hdrlen); 125 fraglen = len - hdrlen; 126 127 if (fraglen) { 128 int offset = (void *)hdr + hdrlen - 129 rxb_addr(rxb) + rxb_offset(rxb); 130 131 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 132 fraglen, rxb->truesize); 133 } 134 135 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 136 } 137 138 /* 139 * iwl_mvm_get_signal_strength - use new rx PHY INFO API 140 * values are reported by the fw as positive values - need to negate 141 * to obtain their dBM. Account for missing antennas by replacing 0 142 * values by -256dBm: practically 0 power and a non-feasible 8 bit value. 143 */ 144 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 145 struct iwl_rx_phy_info *phy_info, 146 struct ieee80211_rx_status *rx_status) 147 { 148 int energy_a, energy_b, energy_c, max_energy; 149 u32 val; 150 151 val = 152 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]); 153 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> 154 IWL_RX_INFO_ENERGY_ANT_A_POS; 155 energy_a = energy_a ? -energy_a : S8_MIN; 156 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> 157 IWL_RX_INFO_ENERGY_ANT_B_POS; 158 energy_b = energy_b ? -energy_b : S8_MIN; 159 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> 160 IWL_RX_INFO_ENERGY_ANT_C_POS; 161 energy_c = energy_c ? -energy_c : S8_MIN; 162 max_energy = max(energy_a, energy_b); 163 max_energy = max(max_energy, energy_c); 164 165 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n", 166 energy_a, energy_b, energy_c, max_energy); 167 168 rx_status->signal = max_energy; 169 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) & 170 RX_RES_PHY_FLAGS_ANTENNA) 171 >> RX_RES_PHY_FLAGS_ANTENNA_POS; 172 rx_status->chain_signal[0] = energy_a; 173 rx_status->chain_signal[1] = energy_b; 174 rx_status->chain_signal[2] = energy_c; 175 } 176 177 /* 178 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format 179 * @mvm: the mvm object 180 * @hdr: 80211 header 181 * @stats: status in mac80211's format 182 * @rx_pkt_status: status coming from fw 183 * 184 * returns non 0 value if the packet should be dropped 185 */ 186 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, 187 struct ieee80211_hdr *hdr, 188 struct ieee80211_rx_status *stats, 189 u32 rx_pkt_status, 190 u8 *crypt_len) 191 { 192 if (!ieee80211_has_protected(hdr->frame_control) || 193 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 194 RX_MPDU_RES_STATUS_SEC_NO_ENC) 195 return 0; 196 197 /* packet was encrypted with unknown alg */ 198 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 199 RX_MPDU_RES_STATUS_SEC_ENC_ERR) 200 return 0; 201 202 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { 203 case RX_MPDU_RES_STATUS_SEC_CCM_ENC: 204 /* alg is CCM: check MIC only */ 205 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 206 return -1; 207 208 stats->flag |= RX_FLAG_DECRYPTED; 209 *crypt_len = IEEE80211_CCMP_HDR_LEN; 210 return 0; 211 212 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: 213 /* Don't drop the frame and decrypt it in SW */ 214 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) 215 return 0; 216 *crypt_len = IEEE80211_TKIP_IV_LEN; 217 /* fall through if TTAK OK */ 218 219 case RX_MPDU_RES_STATUS_SEC_WEP_ENC: 220 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) 221 return -1; 222 223 stats->flag |= RX_FLAG_DECRYPTED; 224 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 225 RX_MPDU_RES_STATUS_SEC_WEP_ENC) 226 *crypt_len = IEEE80211_WEP_IV_LEN; 227 return 0; 228 229 case RX_MPDU_RES_STATUS_SEC_EXT_ENC: 230 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 231 return -1; 232 stats->flag |= RX_FLAG_DECRYPTED; 233 return 0; 234 235 default: 236 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); 237 } 238 239 return 0; 240 } 241 242 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 243 struct sk_buff *skb, 244 u32 status) 245 { 246 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 247 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 248 249 if (mvmvif->features & NETIF_F_RXCSUM && 250 status & RX_MPDU_RES_STATUS_CSUM_DONE && 251 status & RX_MPDU_RES_STATUS_CSUM_OK) 252 skb->ip_summed = CHECKSUM_UNNECESSARY; 253 } 254 255 /* 256 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 257 * 258 * Handles the actual data of the Rx packet from the fw 259 */ 260 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, 261 struct iwl_rx_cmd_buffer *rxb) 262 { 263 struct ieee80211_hdr *hdr; 264 struct ieee80211_rx_status *rx_status; 265 struct iwl_rx_packet *pkt = rxb_addr(rxb); 266 struct iwl_rx_phy_info *phy_info; 267 struct iwl_rx_mpdu_res_start *rx_res; 268 struct ieee80211_sta *sta = NULL; 269 struct sk_buff *skb; 270 u32 len; 271 u32 rate_n_flags; 272 u32 rx_pkt_status; 273 u8 crypt_len = 0; 274 bool take_ref; 275 276 phy_info = &mvm->last_phy_info; 277 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 278 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 279 len = le16_to_cpu(rx_res->byte_count); 280 rx_pkt_status = le32_to_cpup((__le32 *) 281 (pkt->data + sizeof(*rx_res) + len)); 282 283 /* Dont use dev_alloc_skb(), we'll have enough headroom once 284 * ieee80211_hdr pulled. 285 */ 286 skb = alloc_skb(128, GFP_ATOMIC); 287 if (!skb) { 288 IWL_ERR(mvm, "alloc_skb failed\n"); 289 return; 290 } 291 292 rx_status = IEEE80211_SKB_RXCB(skb); 293 294 /* 295 * drop the packet if it has failed being decrypted by HW 296 */ 297 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, 298 &crypt_len)) { 299 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 300 rx_pkt_status); 301 kfree_skb(skb); 302 return; 303 } 304 305 /* 306 * Keep packets with CRC errors (and with overrun) for monitor mode 307 * (otherwise the firmware discards them) but mark them as bad. 308 */ 309 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 310 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 311 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 312 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 313 } 314 315 /* This will be used in several places later */ 316 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 317 318 /* rx_status carries information about the packet to mac80211 */ 319 rx_status->mactime = le64_to_cpu(phy_info->timestamp); 320 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); 321 rx_status->band = 322 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 323 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 324 rx_status->freq = 325 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 326 rx_status->band); 327 328 /* TSF as indicated by the firmware is at INA time */ 329 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 330 331 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); 332 333 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, 334 (unsigned long long)rx_status->mactime); 335 336 rcu_read_lock(); 337 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { 338 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; 339 340 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; 341 342 if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) { 343 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 344 if (IS_ERR(sta)) 345 sta = NULL; 346 } 347 } else if (!is_multicast_ether_addr(hdr->addr2)) { 348 /* This is fine since we prevent two stations with the same 349 * address from being added. 350 */ 351 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 352 } 353 354 if (sta) { 355 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 356 struct ieee80211_vif *tx_blocked_vif = 357 rcu_dereference(mvm->csa_tx_blocked_vif); 358 359 /* We have tx blocked stations (with CS bit). If we heard 360 * frames from a blocked station on a new channel we can 361 * TX to it again. 362 */ 363 if (unlikely(tx_blocked_vif) && 364 mvmsta->vif == tx_blocked_vif) { 365 struct iwl_mvm_vif *mvmvif = 366 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 367 368 if (mvmvif->csa_target_freq == rx_status->freq) 369 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 370 false); 371 } 372 373 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status); 374 375 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && 376 ieee80211_is_beacon(hdr->frame_control)) { 377 struct iwl_fw_dbg_trigger_tlv *trig; 378 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 379 bool trig_check; 380 s32 rssi; 381 382 trig = iwl_fw_dbg_get_trigger(mvm->fw, 383 FW_DBG_TRIGGER_RSSI); 384 rssi_trig = (void *)trig->data; 385 rssi = le32_to_cpu(rssi_trig->rssi); 386 387 trig_check = 388 iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif, 389 trig); 390 if (trig_check && rx_status->signal < rssi) 391 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); 392 } 393 394 if (ieee80211_is_data(hdr->frame_control)) 395 iwl_mvm_rx_csum(sta, skb, rx_pkt_status); 396 } 397 rcu_read_unlock(); 398 399 /* set the preamble flag if appropriate */ 400 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 401 rx_status->flag |= RX_FLAG_SHORTPRE; 402 403 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 404 /* 405 * We know which subframes of an A-MPDU belong 406 * together since we get a single PHY response 407 * from the firmware for all of them 408 */ 409 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 410 rx_status->ampdu_reference = mvm->ampdu_ref; 411 } 412 413 /* Set up the HT phy flags */ 414 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 415 case RATE_MCS_CHAN_WIDTH_20: 416 break; 417 case RATE_MCS_CHAN_WIDTH_40: 418 rx_status->flag |= RX_FLAG_40MHZ; 419 break; 420 case RATE_MCS_CHAN_WIDTH_80: 421 rx_status->vht_flag |= RX_VHT_FLAG_80MHZ; 422 break; 423 case RATE_MCS_CHAN_WIDTH_160: 424 rx_status->vht_flag |= RX_VHT_FLAG_160MHZ; 425 break; 426 } 427 if (rate_n_flags & RATE_MCS_SGI_MSK) 428 rx_status->flag |= RX_FLAG_SHORT_GI; 429 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 430 rx_status->flag |= RX_FLAG_HT_GF; 431 if (rate_n_flags & RATE_MCS_LDPC_MSK) 432 rx_status->flag |= RX_FLAG_LDPC; 433 if (rate_n_flags & RATE_MCS_HT_MSK) { 434 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >> 435 RATE_MCS_STBC_POS; 436 rx_status->flag |= RX_FLAG_HT; 437 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 438 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; 439 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 440 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >> 441 RATE_MCS_STBC_POS; 442 rx_status->vht_nss = 443 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 444 RATE_VHT_MCS_NSS_POS) + 1; 445 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 446 rx_status->flag |= RX_FLAG_VHT; 447 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; 448 if (rate_n_flags & RATE_MCS_BF_MSK) 449 rx_status->vht_flag |= RX_VHT_FLAG_BF; 450 } else { 451 rx_status->rate_idx = 452 iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 453 rx_status->band); 454 } 455 456 #ifdef CONFIG_IWLWIFI_DEBUGFS 457 iwl_mvm_update_frame_stats(mvm, rate_n_flags, 458 rx_status->flag & RX_FLAG_AMPDU_DETAILS); 459 #endif 460 461 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 462 ieee80211_is_probe_resp(hdr->frame_control)) && 463 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) 464 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 465 466 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 467 ieee80211_is_probe_resp(hdr->frame_control))) 468 rx_status->boottime_ns = ktime_get_boot_ns(); 469 470 /* Take a reference briefly to kick off a d0i3 entry delay so 471 * we can handle bursts of RX packets without toggling the 472 * state too often. But don't do this for beacons if we are 473 * going to idle because the beacon filtering changes we make 474 * cause the firmware to send us collateral beacons. */ 475 take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) && 476 ieee80211_is_beacon(hdr->frame_control)); 477 478 if (take_ref) 479 iwl_mvm_ref(mvm, IWL_MVM_REF_RX); 480 481 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, 482 crypt_len, rxb); 483 484 if (take_ref) 485 iwl_mvm_unref(mvm, IWL_MVM_REF_RX); 486 } 487 488 static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm, 489 struct mvm_statistics_rx *rx_stats) 490 { 491 lockdep_assert_held(&mvm->mutex); 492 493 mvm->rx_stats = *rx_stats; 494 } 495 496 struct iwl_mvm_stat_data { 497 struct iwl_mvm *mvm; 498 __le32 mac_id; 499 u8 beacon_filter_average_energy; 500 void *general; 501 }; 502 503 static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 504 struct ieee80211_vif *vif) 505 { 506 struct iwl_mvm_stat_data *data = _data; 507 struct iwl_mvm *mvm = data->mvm; 508 int sig = -data->beacon_filter_average_energy; 509 int last_event; 510 int thold = vif->bss_conf.cqm_rssi_thold; 511 int hyst = vif->bss_conf.cqm_rssi_hyst; 512 u16 id = le32_to_cpu(data->mac_id); 513 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 514 515 /* This doesn't need the MAC ID check since it's not taking the 516 * data copied into the "data" struct, but rather the data from 517 * the notification directly. 518 */ 519 if (data->general) { 520 u16 vif_id = mvmvif->id; 521 522 if (iwl_mvm_is_cdb_supported(mvm)) { 523 struct mvm_statistics_general_cdb *general = 524 data->general; 525 526 mvmvif->beacon_stats.num_beacons = 527 le32_to_cpu(general->beacon_counter[vif_id]); 528 mvmvif->beacon_stats.avg_signal = 529 -general->beacon_average_energy[vif_id]; 530 } else { 531 struct mvm_statistics_general_v8 *general = 532 data->general; 533 534 mvmvif->beacon_stats.num_beacons = 535 le32_to_cpu(general->beacon_counter[vif_id]); 536 mvmvif->beacon_stats.avg_signal = 537 -general->beacon_average_energy[vif_id]; 538 } 539 540 } 541 542 if (mvmvif->id != id) 543 return; 544 545 if (vif->type != NL80211_IFTYPE_STATION) 546 return; 547 548 if (sig == 0) { 549 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); 550 return; 551 } 552 553 mvmvif->bf_data.ave_beacon_signal = sig; 554 555 /* BT Coex */ 556 if (mvmvif->bf_data.bt_coex_min_thold != 557 mvmvif->bf_data.bt_coex_max_thold) { 558 last_event = mvmvif->bf_data.last_bt_coex_event; 559 if (sig > mvmvif->bf_data.bt_coex_max_thold && 560 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 561 last_event == 0)) { 562 mvmvif->bf_data.last_bt_coex_event = sig; 563 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 564 sig); 565 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 566 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 567 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 568 last_event == 0)) { 569 mvmvif->bf_data.last_bt_coex_event = sig; 570 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 571 sig); 572 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 573 } 574 } 575 576 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 577 return; 578 579 /* CQM Notification */ 580 last_event = mvmvif->bf_data.last_cqm_event; 581 if (thold && sig < thold && (last_event == 0 || 582 sig < last_event - hyst)) { 583 mvmvif->bf_data.last_cqm_event = sig; 584 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 585 sig); 586 ieee80211_cqm_rssi_notify( 587 vif, 588 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 589 sig, 590 GFP_KERNEL); 591 } else if (sig > thold && 592 (last_event == 0 || sig > last_event + hyst)) { 593 mvmvif->bf_data.last_cqm_event = sig; 594 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 595 sig); 596 ieee80211_cqm_rssi_notify( 597 vif, 598 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 599 sig, 600 GFP_KERNEL); 601 } 602 } 603 604 static inline void 605 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) 606 { 607 struct iwl_fw_dbg_trigger_tlv *trig; 608 struct iwl_fw_dbg_trigger_stats *trig_stats; 609 u32 trig_offset, trig_thold; 610 611 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS)) 612 return; 613 614 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS); 615 trig_stats = (void *)trig->data; 616 617 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) 618 return; 619 620 trig_offset = le32_to_cpu(trig_stats->stop_offset); 621 trig_thold = le32_to_cpu(trig_stats->stop_threshold); 622 623 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) 624 return; 625 626 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) 627 return; 628 629 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); 630 } 631 632 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, 633 struct iwl_rx_packet *pkt) 634 { 635 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data; 636 struct iwl_mvm_stat_data data = { 637 .mvm = mvm, 638 }; 639 int expected_size; 640 641 if (iwl_mvm_is_cdb_supported(mvm)) 642 expected_size = sizeof(*stats); 643 else if (iwl_mvm_has_new_rx_api(mvm)) 644 expected_size = sizeof(struct iwl_notif_statistics_v11); 645 else 646 expected_size = sizeof(struct iwl_notif_statistics_v10); 647 648 if (iwl_rx_packet_payload_len(pkt) != expected_size) 649 goto invalid; 650 651 data.mac_id = stats->rx.general.mac_id; 652 data.beacon_filter_average_energy = 653 stats->general.common.beacon_filter_average_energy; 654 655 iwl_mvm_update_rx_statistics(mvm, &stats->rx); 656 657 mvm->radio_stats.rx_time = le64_to_cpu(stats->general.common.rx_time); 658 mvm->radio_stats.tx_time = le64_to_cpu(stats->general.common.tx_time); 659 mvm->radio_stats.on_time_rf = 660 le64_to_cpu(stats->general.common.on_time_rf); 661 mvm->radio_stats.on_time_scan = 662 le64_to_cpu(stats->general.common.on_time_scan); 663 664 data.general = &stats->general; 665 if (iwl_mvm_has_new_rx_api(mvm)) { 666 int i; 667 u8 *energy; 668 __le32 *bytes, *air_time; 669 670 if (!iwl_mvm_is_cdb_supported(mvm)) { 671 struct iwl_notif_statistics_v11 *v11 = 672 (void *)&pkt->data; 673 674 energy = (void *)&v11->load_stats.avg_energy; 675 bytes = (void *)&v11->load_stats.byte_count; 676 air_time = (void *)&v11->load_stats.air_time; 677 } else { 678 energy = (void *)&stats->load_stats.avg_energy; 679 bytes = (void *)&stats->load_stats.byte_count; 680 air_time = (void *)&stats->load_stats.air_time; 681 } 682 683 rcu_read_lock(); 684 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) { 685 struct iwl_mvm_sta *sta; 686 687 if (!energy[i]) 688 continue; 689 690 sta = iwl_mvm_sta_from_staid_rcu(mvm, i); 691 if (!sta) 692 continue; 693 sta->avg_energy = energy[i]; 694 } 695 rcu_read_unlock(); 696 } 697 698 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 699 700 ieee80211_iterate_active_interfaces(mvm->hw, 701 IEEE80211_IFACE_ITER_NORMAL, 702 iwl_mvm_stat_iterator, 703 &data); 704 return; 705 invalid: 706 IWL_ERR(mvm, "received invalid statistics size (%d)!\n", 707 iwl_rx_packet_payload_len(pkt)); 708 } 709 710 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 711 { 712 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); 713 } 714 715 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, 716 struct iwl_rx_cmd_buffer *rxb) 717 { 718 struct iwl_rx_packet *pkt = rxb_addr(rxb); 719 struct iwl_ba_window_status_notif *notif = (void *)pkt->data; 720 int i; 721 u32 pkt_len = iwl_rx_packet_payload_len(pkt); 722 723 if (WARN_ONCE(pkt_len != sizeof(*notif), 724 "Received window status notification of wrong size (%u)\n", 725 pkt_len)) 726 return; 727 728 rcu_read_lock(); 729 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { 730 struct ieee80211_sta *sta; 731 u8 sta_id, tid; 732 u64 bitmap; 733 u32 ssn; 734 u16 ratid; 735 u16 received_mpdu; 736 737 ratid = le16_to_cpu(notif->ra_tid[i]); 738 /* check that this TID is valid */ 739 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) 740 continue; 741 742 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); 743 if (received_mpdu == 0) 744 continue; 745 746 tid = ratid & BA_WINDOW_STATUS_TID_MSK; 747 /* get the station */ 748 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) 749 >> BA_WINDOW_STATUS_STA_ID_POS; 750 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 751 if (IS_ERR_OR_NULL(sta)) 752 continue; 753 bitmap = le64_to_cpu(notif->bitmap[i]); 754 ssn = le32_to_cpu(notif->start_seq_num[i]); 755 756 /* update mac80211 with the bitmap for the reordering buffer */ 757 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, 758 received_mpdu); 759 } 760 rcu_read_unlock(); 761 } 762