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 #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 = ieee80211_hdrlen(hdr->frame_control); 108 unsigned int fraglen; 109 110 /* 111 * The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len, 112 * but those are all multiples of 4 long) all goes away, but we 113 * want the *end* of it, which is going to be the start of the IP 114 * header, to be aligned when it gets pulled in. 115 * The beginning of the skb->data is aligned on at least a 4-byte 116 * boundary after allocation. Everything here is aligned at least 117 * on a 2-byte boundary so we can just take hdrlen & 3 and pad by 118 * the result. 119 */ 120 skb_reserve(skb, hdrlen & 3); 121 122 /* If frame is small enough to fit in skb->head, pull it completely. 123 * If not, only pull ieee80211_hdr (including crypto if present, and 124 * an additional 8 bytes for SNAP/ethertype, see below) so that 125 * splice() or TCP coalesce are more efficient. 126 * 127 * Since, in addition, ieee80211_data_to_8023() always pull in at 128 * least 8 bytes (possibly more for mesh) we can do the same here 129 * to save the cost of doing it later. That still doesn't pull in 130 * the actual IP header since the typical case has a SNAP header. 131 * If the latter changes (there are efforts in the standards group 132 * to do so) we should revisit this and ieee80211_data_to_8023(). 133 */ 134 hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8; 135 136 memcpy(skb_put(skb, hdrlen), hdr, hdrlen); 137 fraglen = len - hdrlen; 138 139 if (fraglen) { 140 int offset = (void *)hdr + hdrlen - 141 rxb_addr(rxb) + rxb_offset(rxb); 142 143 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 144 fraglen, rxb->truesize); 145 } 146 147 ieee80211_rx_napi(mvm->hw, sta, skb, napi); 148 } 149 150 /* 151 * iwl_mvm_get_signal_strength - use new rx PHY INFO API 152 * values are reported by the fw as positive values - need to negate 153 * to obtain their dBM. Account for missing antennas by replacing 0 154 * values by -256dBm: practically 0 power and a non-feasible 8 bit value. 155 */ 156 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 157 struct iwl_rx_phy_info *phy_info, 158 struct ieee80211_rx_status *rx_status) 159 { 160 int energy_a, energy_b, energy_c, max_energy; 161 u32 val; 162 163 val = 164 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]); 165 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> 166 IWL_RX_INFO_ENERGY_ANT_A_POS; 167 energy_a = energy_a ? -energy_a : S8_MIN; 168 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> 169 IWL_RX_INFO_ENERGY_ANT_B_POS; 170 energy_b = energy_b ? -energy_b : S8_MIN; 171 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> 172 IWL_RX_INFO_ENERGY_ANT_C_POS; 173 energy_c = energy_c ? -energy_c : S8_MIN; 174 max_energy = max(energy_a, energy_b); 175 max_energy = max(max_energy, energy_c); 176 177 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n", 178 energy_a, energy_b, energy_c, max_energy); 179 180 rx_status->signal = max_energy; 181 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) & 182 RX_RES_PHY_FLAGS_ANTENNA) 183 >> RX_RES_PHY_FLAGS_ANTENNA_POS; 184 rx_status->chain_signal[0] = energy_a; 185 rx_status->chain_signal[1] = energy_b; 186 rx_status->chain_signal[2] = energy_c; 187 } 188 189 /* 190 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format 191 * @mvm: the mvm object 192 * @hdr: 80211 header 193 * @stats: status in mac80211's format 194 * @rx_pkt_status: status coming from fw 195 * 196 * returns non 0 value if the packet should be dropped 197 */ 198 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, 199 struct ieee80211_hdr *hdr, 200 struct ieee80211_rx_status *stats, 201 u32 rx_pkt_status, 202 u8 *crypt_len) 203 { 204 if (!ieee80211_has_protected(hdr->frame_control) || 205 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 206 RX_MPDU_RES_STATUS_SEC_NO_ENC) 207 return 0; 208 209 /* packet was encrypted with unknown alg */ 210 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 211 RX_MPDU_RES_STATUS_SEC_ENC_ERR) 212 return 0; 213 214 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { 215 case RX_MPDU_RES_STATUS_SEC_CCM_ENC: 216 /* alg is CCM: check MIC only */ 217 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 218 return -1; 219 220 stats->flag |= RX_FLAG_DECRYPTED; 221 *crypt_len = IEEE80211_CCMP_HDR_LEN; 222 return 0; 223 224 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: 225 /* Don't drop the frame and decrypt it in SW */ 226 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) 227 return 0; 228 *crypt_len = IEEE80211_TKIP_IV_LEN; 229 /* fall through if TTAK OK */ 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 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); 249 } 250 251 return 0; 252 } 253 254 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 255 struct sk_buff *skb, 256 u32 status) 257 { 258 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 259 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 260 261 if (mvmvif->features & NETIF_F_RXCSUM && 262 status & RX_MPDU_RES_STATUS_CSUM_DONE && 263 status & RX_MPDU_RES_STATUS_CSUM_OK) 264 skb->ip_summed = CHECKSUM_UNNECESSARY; 265 } 266 267 /* 268 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 269 * 270 * Handles the actual data of the Rx packet from the fw 271 */ 272 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, 273 struct iwl_rx_cmd_buffer *rxb) 274 { 275 struct ieee80211_hdr *hdr; 276 struct ieee80211_rx_status *rx_status; 277 struct iwl_rx_packet *pkt = rxb_addr(rxb); 278 struct iwl_rx_phy_info *phy_info; 279 struct iwl_rx_mpdu_res_start *rx_res; 280 struct ieee80211_sta *sta = NULL; 281 struct sk_buff *skb; 282 u32 len; 283 u32 rate_n_flags; 284 u32 rx_pkt_status; 285 u8 crypt_len = 0; 286 bool take_ref; 287 288 phy_info = &mvm->last_phy_info; 289 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 290 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 291 len = le16_to_cpu(rx_res->byte_count); 292 rx_pkt_status = le32_to_cpup((__le32 *) 293 (pkt->data + sizeof(*rx_res) + len)); 294 295 /* Dont use dev_alloc_skb(), we'll have enough headroom once 296 * ieee80211_hdr pulled. 297 */ 298 skb = alloc_skb(128, GFP_ATOMIC); 299 if (!skb) { 300 IWL_ERR(mvm, "alloc_skb failed\n"); 301 return; 302 } 303 304 rx_status = IEEE80211_SKB_RXCB(skb); 305 306 /* 307 * drop the packet if it has failed being decrypted by HW 308 */ 309 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, 310 &crypt_len)) { 311 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 312 rx_pkt_status); 313 kfree_skb(skb); 314 return; 315 } 316 317 /* 318 * Keep packets with CRC errors (and with overrun) for monitor mode 319 * (otherwise the firmware discards them) but mark them as bad. 320 */ 321 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 322 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 323 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 324 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 325 } 326 327 /* This will be used in several places later */ 328 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 329 330 /* rx_status carries information about the packet to mac80211 */ 331 rx_status->mactime = le64_to_cpu(phy_info->timestamp); 332 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); 333 rx_status->band = 334 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 335 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 336 rx_status->freq = 337 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 338 rx_status->band); 339 340 /* TSF as indicated by the firmware is at INA time */ 341 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 342 343 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); 344 345 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, 346 (unsigned long long)rx_status->mactime); 347 348 rcu_read_lock(); 349 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { 350 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; 351 352 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; 353 354 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 355 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 356 if (IS_ERR(sta)) 357 sta = NULL; 358 } 359 } else if (!is_multicast_ether_addr(hdr->addr2)) { 360 /* This is fine since we prevent two stations with the same 361 * address from being added. 362 */ 363 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 364 } 365 366 if (sta) { 367 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 368 struct ieee80211_vif *tx_blocked_vif = 369 rcu_dereference(mvm->csa_tx_blocked_vif); 370 371 /* We have tx blocked stations (with CS bit). If we heard 372 * frames from a blocked station on a new channel we can 373 * TX to it again. 374 */ 375 if (unlikely(tx_blocked_vif) && 376 mvmsta->vif == tx_blocked_vif) { 377 struct iwl_mvm_vif *mvmvif = 378 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 379 380 if (mvmvif->csa_target_freq == rx_status->freq) 381 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 382 false); 383 } 384 385 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status); 386 387 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && 388 ieee80211_is_beacon(hdr->frame_control)) { 389 struct iwl_fw_dbg_trigger_tlv *trig; 390 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 391 bool trig_check; 392 s32 rssi; 393 394 trig = iwl_fw_dbg_get_trigger(mvm->fw, 395 FW_DBG_TRIGGER_RSSI); 396 rssi_trig = (void *)trig->data; 397 rssi = le32_to_cpu(rssi_trig->rssi); 398 399 trig_check = 400 iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif, 401 trig); 402 if (trig_check && rx_status->signal < rssi) 403 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); 404 } 405 406 if (ieee80211_is_data(hdr->frame_control)) 407 iwl_mvm_rx_csum(sta, skb, rx_pkt_status); 408 } 409 rcu_read_unlock(); 410 411 /* set the preamble flag if appropriate */ 412 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 413 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 414 415 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 416 /* 417 * We know which subframes of an A-MPDU belong 418 * together since we get a single PHY response 419 * from the firmware for all of them 420 */ 421 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 422 rx_status->ampdu_reference = mvm->ampdu_ref; 423 } 424 425 /* Set up the HT phy flags */ 426 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 427 case RATE_MCS_CHAN_WIDTH_20: 428 break; 429 case RATE_MCS_CHAN_WIDTH_40: 430 rx_status->bw = RATE_INFO_BW_40; 431 break; 432 case RATE_MCS_CHAN_WIDTH_80: 433 rx_status->bw = RATE_INFO_BW_80; 434 break; 435 case RATE_MCS_CHAN_WIDTH_160: 436 rx_status->bw = RATE_INFO_BW_160; 437 break; 438 } 439 if (rate_n_flags & RATE_MCS_SGI_MSK) 440 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 441 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 442 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 443 if (rate_n_flags & RATE_MCS_LDPC_MSK) 444 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 445 if (rate_n_flags & RATE_MCS_HT_MSK) { 446 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 447 RATE_MCS_STBC_POS; 448 rx_status->encoding = RX_ENC_HT; 449 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 450 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 451 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 452 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 453 RATE_MCS_STBC_POS; 454 rx_status->nss = 455 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 456 RATE_VHT_MCS_NSS_POS) + 1; 457 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 458 rx_status->encoding = RX_ENC_VHT; 459 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 460 if (rate_n_flags & RATE_MCS_BF_MSK) 461 rx_status->enc_flags |= RX_ENC_FLAG_BF; 462 } else { 463 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 464 rx_status->band); 465 466 if (WARN(rate < 0 || rate > 0xFF, 467 "Invalid rate flags 0x%x, band %d,\n", 468 rate_n_flags, rx_status->band)) { 469 kfree_skb(skb); 470 return; 471 } 472 rx_status->rate_idx = rate; 473 } 474 475 #ifdef CONFIG_IWLWIFI_DEBUGFS 476 iwl_mvm_update_frame_stats(mvm, rate_n_flags, 477 rx_status->flag & RX_FLAG_AMPDU_DETAILS); 478 #endif 479 480 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 481 ieee80211_is_probe_resp(hdr->frame_control)) && 482 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) 483 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 484 485 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 486 ieee80211_is_probe_resp(hdr->frame_control))) 487 rx_status->boottime_ns = ktime_get_boot_ns(); 488 489 /* Take a reference briefly to kick off a d0i3 entry delay so 490 * we can handle bursts of RX packets without toggling the 491 * state too often. But don't do this for beacons if we are 492 * going to idle because the beacon filtering changes we make 493 * cause the firmware to send us collateral beacons. */ 494 take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) && 495 ieee80211_is_beacon(hdr->frame_control)); 496 497 if (take_ref) 498 iwl_mvm_ref(mvm, IWL_MVM_REF_RX); 499 500 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, 501 crypt_len, rxb); 502 503 if (take_ref) 504 iwl_mvm_unref(mvm, IWL_MVM_REF_RX); 505 } 506 507 static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm, 508 struct mvm_statistics_rx *rx_stats) 509 { 510 lockdep_assert_held(&mvm->mutex); 511 512 mvm->rx_stats = *rx_stats; 513 } 514 515 struct iwl_mvm_stat_data { 516 struct iwl_mvm *mvm; 517 __le32 mac_id; 518 u8 beacon_filter_average_energy; 519 void *general; 520 }; 521 522 static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 523 struct ieee80211_vif *vif) 524 { 525 struct iwl_mvm_stat_data *data = _data; 526 struct iwl_mvm *mvm = data->mvm; 527 int sig = -data->beacon_filter_average_energy; 528 int last_event; 529 int thold = vif->bss_conf.cqm_rssi_thold; 530 int hyst = vif->bss_conf.cqm_rssi_hyst; 531 u16 id = le32_to_cpu(data->mac_id); 532 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 533 534 /* This doesn't need the MAC ID check since it's not taking the 535 * data copied into the "data" struct, but rather the data from 536 * the notification directly. 537 */ 538 if (data->general) { 539 u16 vif_id = mvmvif->id; 540 541 if (iwl_mvm_is_cdb_supported(mvm)) { 542 struct mvm_statistics_general_cdb *general = 543 data->general; 544 545 mvmvif->beacon_stats.num_beacons = 546 le32_to_cpu(general->beacon_counter[vif_id]); 547 mvmvif->beacon_stats.avg_signal = 548 -general->beacon_average_energy[vif_id]; 549 } else { 550 struct mvm_statistics_general_v8 *general = 551 data->general; 552 553 mvmvif->beacon_stats.num_beacons = 554 le32_to_cpu(general->beacon_counter[vif_id]); 555 mvmvif->beacon_stats.avg_signal = 556 -general->beacon_average_energy[vif_id]; 557 } 558 559 } 560 561 if (mvmvif->id != id) 562 return; 563 564 if (vif->type != NL80211_IFTYPE_STATION) 565 return; 566 567 if (sig == 0) { 568 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); 569 return; 570 } 571 572 mvmvif->bf_data.ave_beacon_signal = sig; 573 574 /* BT Coex */ 575 if (mvmvif->bf_data.bt_coex_min_thold != 576 mvmvif->bf_data.bt_coex_max_thold) { 577 last_event = mvmvif->bf_data.last_bt_coex_event; 578 if (sig > mvmvif->bf_data.bt_coex_max_thold && 579 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 580 last_event == 0)) { 581 mvmvif->bf_data.last_bt_coex_event = sig; 582 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 583 sig); 584 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 585 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 586 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 587 last_event == 0)) { 588 mvmvif->bf_data.last_bt_coex_event = sig; 589 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 590 sig); 591 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 592 } 593 } 594 595 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 596 return; 597 598 /* CQM Notification */ 599 last_event = mvmvif->bf_data.last_cqm_event; 600 if (thold && sig < thold && (last_event == 0 || 601 sig < last_event - hyst)) { 602 mvmvif->bf_data.last_cqm_event = sig; 603 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 604 sig); 605 ieee80211_cqm_rssi_notify( 606 vif, 607 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 608 sig, 609 GFP_KERNEL); 610 } else if (sig > thold && 611 (last_event == 0 || sig > last_event + hyst)) { 612 mvmvif->bf_data.last_cqm_event = sig; 613 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 614 sig); 615 ieee80211_cqm_rssi_notify( 616 vif, 617 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 618 sig, 619 GFP_KERNEL); 620 } 621 } 622 623 static inline void 624 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) 625 { 626 struct iwl_fw_dbg_trigger_tlv *trig; 627 struct iwl_fw_dbg_trigger_stats *trig_stats; 628 u32 trig_offset, trig_thold; 629 630 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS)) 631 return; 632 633 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS); 634 trig_stats = (void *)trig->data; 635 636 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) 637 return; 638 639 trig_offset = le32_to_cpu(trig_stats->stop_offset); 640 trig_thold = le32_to_cpu(trig_stats->stop_threshold); 641 642 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) 643 return; 644 645 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) 646 return; 647 648 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); 649 } 650 651 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, 652 struct iwl_rx_packet *pkt) 653 { 654 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data; 655 struct iwl_mvm_stat_data data = { 656 .mvm = mvm, 657 }; 658 int expected_size; 659 int i; 660 u8 *energy; 661 __le32 *bytes, *air_time; 662 663 if (iwl_mvm_is_cdb_supported(mvm)) 664 expected_size = sizeof(*stats); 665 else if (iwl_mvm_has_new_rx_api(mvm)) 666 expected_size = sizeof(struct iwl_notif_statistics_v11); 667 else 668 expected_size = sizeof(struct iwl_notif_statistics_v10); 669 670 if (iwl_rx_packet_payload_len(pkt) != expected_size) { 671 IWL_ERR(mvm, "received invalid statistics size (%d)!\n", 672 iwl_rx_packet_payload_len(pkt)); 673 return; 674 } 675 676 data.mac_id = stats->rx.general.mac_id; 677 data.beacon_filter_average_energy = 678 stats->general.common.beacon_filter_average_energy; 679 680 iwl_mvm_update_rx_statistics(mvm, &stats->rx); 681 682 mvm->radio_stats.rx_time = le64_to_cpu(stats->general.common.rx_time); 683 mvm->radio_stats.tx_time = 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 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 692 693 ieee80211_iterate_active_interfaces(mvm->hw, 694 IEEE80211_IFACE_ITER_NORMAL, 695 iwl_mvm_stat_iterator, 696 &data); 697 698 if (!iwl_mvm_has_new_rx_api(mvm)) 699 return; 700 701 if (!iwl_mvm_is_cdb_supported(mvm)) { 702 struct iwl_notif_statistics_v11 *v11 = 703 (void *)&pkt->data; 704 705 energy = (void *)&v11->load_stats.avg_energy; 706 bytes = (void *)&v11->load_stats.byte_count; 707 air_time = (void *)&v11->load_stats.air_time; 708 } else { 709 energy = (void *)&stats->load_stats.avg_energy; 710 bytes = (void *)&stats->load_stats.byte_count; 711 air_time = (void *)&stats->load_stats.air_time; 712 } 713 714 rcu_read_lock(); 715 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 716 struct iwl_mvm_sta *sta; 717 718 if (!energy[i]) 719 continue; 720 721 sta = iwl_mvm_sta_from_staid_rcu(mvm, i); 722 if (!sta) 723 continue; 724 sta->avg_energy = energy[i]; 725 } 726 rcu_read_unlock(); 727 } 728 729 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 730 { 731 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); 732 } 733 734 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, 735 struct iwl_rx_cmd_buffer *rxb) 736 { 737 struct iwl_rx_packet *pkt = rxb_addr(rxb); 738 struct iwl_ba_window_status_notif *notif = (void *)pkt->data; 739 int i; 740 u32 pkt_len = iwl_rx_packet_payload_len(pkt); 741 742 if (WARN_ONCE(pkt_len != sizeof(*notif), 743 "Received window status notification of wrong size (%u)\n", 744 pkt_len)) 745 return; 746 747 rcu_read_lock(); 748 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { 749 struct ieee80211_sta *sta; 750 u8 sta_id, tid; 751 u64 bitmap; 752 u32 ssn; 753 u16 ratid; 754 u16 received_mpdu; 755 756 ratid = le16_to_cpu(notif->ra_tid[i]); 757 /* check that this TID is valid */ 758 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) 759 continue; 760 761 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); 762 if (received_mpdu == 0) 763 continue; 764 765 tid = ratid & BA_WINDOW_STATUS_TID_MSK; 766 /* get the station */ 767 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) 768 >> BA_WINDOW_STATUS_STA_ID_POS; 769 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 770 if (IS_ERR_OR_NULL(sta)) 771 continue; 772 bitmap = le64_to_cpu(notif->bitmap[i]); 773 ssn = le32_to_cpu(notif->start_seq_num[i]); 774 775 /* update mac80211 with the bitmap for the reordering buffer */ 776 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, 777 received_mpdu); 778 } 779 rcu_read_unlock(); 780 } 781