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 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); 248 } 249 250 return 0; 251 } 252 253 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 254 struct sk_buff *skb, 255 u32 status) 256 { 257 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 258 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 259 260 if (mvmvif->features & NETIF_F_RXCSUM && 261 status & RX_MPDU_RES_STATUS_CSUM_DONE && 262 status & RX_MPDU_RES_STATUS_CSUM_OK) 263 skb->ip_summed = CHECKSUM_UNNECESSARY; 264 } 265 266 /* 267 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 268 * 269 * Handles the actual data of the Rx packet from the fw 270 */ 271 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, 272 struct iwl_rx_cmd_buffer *rxb) 273 { 274 struct ieee80211_hdr *hdr; 275 struct ieee80211_rx_status *rx_status; 276 struct iwl_rx_packet *pkt = rxb_addr(rxb); 277 struct iwl_rx_phy_info *phy_info; 278 struct iwl_rx_mpdu_res_start *rx_res; 279 struct ieee80211_sta *sta = NULL; 280 struct sk_buff *skb; 281 u32 len; 282 u32 rate_n_flags; 283 u32 rx_pkt_status; 284 u8 crypt_len = 0; 285 bool take_ref; 286 287 phy_info = &mvm->last_phy_info; 288 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 289 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 290 len = le16_to_cpu(rx_res->byte_count); 291 rx_pkt_status = le32_to_cpup((__le32 *) 292 (pkt->data + sizeof(*rx_res) + len)); 293 294 /* Dont use dev_alloc_skb(), we'll have enough headroom once 295 * ieee80211_hdr pulled. 296 */ 297 skb = alloc_skb(128, GFP_ATOMIC); 298 if (!skb) { 299 IWL_ERR(mvm, "alloc_skb failed\n"); 300 return; 301 } 302 303 rx_status = IEEE80211_SKB_RXCB(skb); 304 305 /* 306 * drop the packet if it has failed being decrypted by HW 307 */ 308 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, 309 &crypt_len)) { 310 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 311 rx_pkt_status); 312 kfree_skb(skb); 313 return; 314 } 315 316 /* 317 * Keep packets with CRC errors (and with overrun) for monitor mode 318 * (otherwise the firmware discards them) but mark them as bad. 319 */ 320 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 321 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 322 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 323 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 324 } 325 326 /* This will be used in several places later */ 327 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 328 329 /* rx_status carries information about the packet to mac80211 */ 330 rx_status->mactime = le64_to_cpu(phy_info->timestamp); 331 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); 332 rx_status->band = 333 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 334 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 335 rx_status->freq = 336 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 337 rx_status->band); 338 339 /* TSF as indicated by the firmware is at INA time */ 340 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 341 342 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); 343 344 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, 345 (unsigned long long)rx_status->mactime); 346 347 rcu_read_lock(); 348 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { 349 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; 350 351 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; 352 353 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 354 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 355 if (IS_ERR(sta)) 356 sta = NULL; 357 } 358 } else if (!is_multicast_ether_addr(hdr->addr2)) { 359 /* This is fine since we prevent two stations with the same 360 * address from being added. 361 */ 362 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 363 } 364 365 if (sta) { 366 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 367 struct ieee80211_vif *tx_blocked_vif = 368 rcu_dereference(mvm->csa_tx_blocked_vif); 369 370 /* We have tx blocked stations (with CS bit). If we heard 371 * frames from a blocked station on a new channel we can 372 * TX to it again. 373 */ 374 if (unlikely(tx_blocked_vif) && 375 mvmsta->vif == tx_blocked_vif) { 376 struct iwl_mvm_vif *mvmvif = 377 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 378 379 if (mvmvif->csa_target_freq == rx_status->freq) 380 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 381 false); 382 } 383 384 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status); 385 386 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && 387 ieee80211_is_beacon(hdr->frame_control)) { 388 struct iwl_fw_dbg_trigger_tlv *trig; 389 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 390 bool trig_check; 391 s32 rssi; 392 393 trig = iwl_fw_dbg_get_trigger(mvm->fw, 394 FW_DBG_TRIGGER_RSSI); 395 rssi_trig = (void *)trig->data; 396 rssi = le32_to_cpu(rssi_trig->rssi); 397 398 trig_check = 399 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 400 ieee80211_vif_to_wdev(mvmsta->vif), 401 trig); 402 if (trig_check && rx_status->signal < rssi) 403 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 404 NULL); 405 } 406 407 if (ieee80211_is_data(hdr->frame_control)) 408 iwl_mvm_rx_csum(sta, skb, rx_pkt_status); 409 } 410 rcu_read_unlock(); 411 412 /* set the preamble flag if appropriate */ 413 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 414 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 415 416 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 417 /* 418 * We know which subframes of an A-MPDU belong 419 * together since we get a single PHY response 420 * from the firmware for all of them 421 */ 422 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 423 rx_status->ampdu_reference = mvm->ampdu_ref; 424 } 425 426 /* Set up the HT phy flags */ 427 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 428 case RATE_MCS_CHAN_WIDTH_20: 429 break; 430 case RATE_MCS_CHAN_WIDTH_40: 431 rx_status->bw = RATE_INFO_BW_40; 432 break; 433 case RATE_MCS_CHAN_WIDTH_80: 434 rx_status->bw = RATE_INFO_BW_80; 435 break; 436 case RATE_MCS_CHAN_WIDTH_160: 437 rx_status->bw = RATE_INFO_BW_160; 438 break; 439 } 440 if (rate_n_flags & RATE_MCS_SGI_MSK) 441 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 442 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 443 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 444 if (rate_n_flags & RATE_MCS_LDPC_MSK) 445 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 446 if (rate_n_flags & RATE_MCS_HT_MSK) { 447 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 448 RATE_MCS_STBC_POS; 449 rx_status->encoding = RX_ENC_HT; 450 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 451 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 452 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 453 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 454 RATE_MCS_STBC_POS; 455 rx_status->nss = 456 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 457 RATE_VHT_MCS_NSS_POS) + 1; 458 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 459 rx_status->encoding = RX_ENC_VHT; 460 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 461 if (rate_n_flags & RATE_MCS_BF_MSK) 462 rx_status->enc_flags |= RX_ENC_FLAG_BF; 463 } else { 464 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 465 rx_status->band); 466 467 if (WARN(rate < 0 || rate > 0xFF, 468 "Invalid rate flags 0x%x, band %d,\n", 469 rate_n_flags, rx_status->band)) { 470 kfree_skb(skb); 471 return; 472 } 473 rx_status->rate_idx = rate; 474 } 475 476 #ifdef CONFIG_IWLWIFI_DEBUGFS 477 iwl_mvm_update_frame_stats(mvm, rate_n_flags, 478 rx_status->flag & RX_FLAG_AMPDU_DETAILS); 479 #endif 480 481 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 482 ieee80211_is_probe_resp(hdr->frame_control)) && 483 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) 484 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 485 486 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 487 ieee80211_is_probe_resp(hdr->frame_control))) 488 rx_status->boottime_ns = ktime_get_boot_ns(); 489 490 /* Take a reference briefly to kick off a d0i3 entry delay so 491 * we can handle bursts of RX packets without toggling the 492 * state too often. But don't do this for beacons if we are 493 * going to idle because the beacon filtering changes we make 494 * cause the firmware to send us collateral beacons. */ 495 take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) && 496 ieee80211_is_beacon(hdr->frame_control)); 497 498 if (take_ref) 499 iwl_mvm_ref(mvm, IWL_MVM_REF_RX); 500 501 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, 502 crypt_len, rxb); 503 504 if (take_ref) 505 iwl_mvm_unref(mvm, IWL_MVM_REF_RX); 506 } 507 508 struct iwl_mvm_stat_data { 509 struct iwl_mvm *mvm; 510 __le32 mac_id; 511 u8 beacon_filter_average_energy; 512 void *general; 513 }; 514 515 static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 516 struct ieee80211_vif *vif) 517 { 518 struct iwl_mvm_stat_data *data = _data; 519 struct iwl_mvm *mvm = data->mvm; 520 int sig = -data->beacon_filter_average_energy; 521 int last_event; 522 int thold = vif->bss_conf.cqm_rssi_thold; 523 int hyst = vif->bss_conf.cqm_rssi_hyst; 524 u16 id = le32_to_cpu(data->mac_id); 525 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 526 527 /* This doesn't need the MAC ID check since it's not taking the 528 * data copied into the "data" struct, but rather the data from 529 * the notification directly. 530 */ 531 if (data->general) { 532 u16 vif_id = mvmvif->id; 533 534 if (iwl_mvm_is_cdb_supported(mvm)) { 535 struct mvm_statistics_general_cdb *general = 536 data->general; 537 538 mvmvif->beacon_stats.num_beacons = 539 le32_to_cpu(general->beacon_counter[vif_id]); 540 mvmvif->beacon_stats.avg_signal = 541 -general->beacon_average_energy[vif_id]; 542 } else { 543 struct mvm_statistics_general_v8 *general = 544 data->general; 545 546 mvmvif->beacon_stats.num_beacons = 547 le32_to_cpu(general->beacon_counter[vif_id]); 548 mvmvif->beacon_stats.avg_signal = 549 -general->beacon_average_energy[vif_id]; 550 } 551 } 552 553 if (mvmvif->id != id) 554 return; 555 556 if (vif->type != NL80211_IFTYPE_STATION) 557 return; 558 559 if (sig == 0) { 560 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); 561 return; 562 } 563 564 mvmvif->bf_data.ave_beacon_signal = sig; 565 566 /* BT Coex */ 567 if (mvmvif->bf_data.bt_coex_min_thold != 568 mvmvif->bf_data.bt_coex_max_thold) { 569 last_event = mvmvif->bf_data.last_bt_coex_event; 570 if (sig > mvmvif->bf_data.bt_coex_max_thold && 571 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 572 last_event == 0)) { 573 mvmvif->bf_data.last_bt_coex_event = sig; 574 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 575 sig); 576 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 577 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 578 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 579 last_event == 0)) { 580 mvmvif->bf_data.last_bt_coex_event = sig; 581 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 582 sig); 583 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 584 } 585 } 586 587 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 588 return; 589 590 /* CQM Notification */ 591 last_event = mvmvif->bf_data.last_cqm_event; 592 if (thold && sig < thold && (last_event == 0 || 593 sig < last_event - hyst)) { 594 mvmvif->bf_data.last_cqm_event = sig; 595 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 596 sig); 597 ieee80211_cqm_rssi_notify( 598 vif, 599 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 600 sig, 601 GFP_KERNEL); 602 } else if (sig > thold && 603 (last_event == 0 || sig > last_event + hyst)) { 604 mvmvif->bf_data.last_cqm_event = sig; 605 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 606 sig); 607 ieee80211_cqm_rssi_notify( 608 vif, 609 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 610 sig, 611 GFP_KERNEL); 612 } 613 } 614 615 static inline void 616 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) 617 { 618 struct iwl_fw_dbg_trigger_tlv *trig; 619 struct iwl_fw_dbg_trigger_stats *trig_stats; 620 u32 trig_offset, trig_thold; 621 622 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS)) 623 return; 624 625 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS); 626 trig_stats = (void *)trig->data; 627 628 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig)) 629 return; 630 631 trig_offset = le32_to_cpu(trig_stats->stop_offset); 632 trig_thold = le32_to_cpu(trig_stats->stop_threshold); 633 634 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) 635 return; 636 637 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) 638 return; 639 640 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL); 641 } 642 643 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, 644 struct iwl_rx_packet *pkt) 645 { 646 struct iwl_mvm_stat_data data = { 647 .mvm = mvm, 648 }; 649 int expected_size; 650 int i; 651 u8 *energy; 652 __le32 *bytes, *air_time; 653 __le32 flags; 654 655 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 656 if (iwl_mvm_has_new_rx_api(mvm)) 657 expected_size = sizeof(struct iwl_notif_statistics_v11); 658 else 659 expected_size = sizeof(struct iwl_notif_statistics_v10); 660 } else { 661 expected_size = sizeof(struct iwl_notif_statistics_cdb); 662 } 663 664 if (iwl_rx_packet_payload_len(pkt) != expected_size) { 665 IWL_ERR(mvm, "received invalid statistics size (%d)!\n", 666 iwl_rx_packet_payload_len(pkt)); 667 return; 668 } 669 670 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 671 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data; 672 673 data.mac_id = stats->rx.general.mac_id; 674 data.beacon_filter_average_energy = 675 stats->general.common.beacon_filter_average_energy; 676 677 mvm->rx_stats_v3 = stats->rx; 678 679 mvm->radio_stats.rx_time = 680 le64_to_cpu(stats->general.common.rx_time); 681 mvm->radio_stats.tx_time = 682 le64_to_cpu(stats->general.common.tx_time); 683 mvm->radio_stats.on_time_rf = 684 le64_to_cpu(stats->general.common.on_time_rf); 685 mvm->radio_stats.on_time_scan = 686 le64_to_cpu(stats->general.common.on_time_scan); 687 688 data.general = &stats->general; 689 690 flags = stats->flag; 691 } else { 692 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data; 693 694 data.mac_id = stats->rx.general.mac_id; 695 data.beacon_filter_average_energy = 696 stats->general.common.beacon_filter_average_energy; 697 698 mvm->rx_stats = stats->rx; 699 700 mvm->radio_stats.rx_time = 701 le64_to_cpu(stats->general.common.rx_time); 702 mvm->radio_stats.tx_time = 703 le64_to_cpu(stats->general.common.tx_time); 704 mvm->radio_stats.on_time_rf = 705 le64_to_cpu(stats->general.common.on_time_rf); 706 mvm->radio_stats.on_time_scan = 707 le64_to_cpu(stats->general.common.on_time_scan); 708 709 data.general = &stats->general; 710 711 flags = stats->flag; 712 } 713 714 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 715 716 ieee80211_iterate_active_interfaces(mvm->hw, 717 IEEE80211_IFACE_ITER_NORMAL, 718 iwl_mvm_stat_iterator, 719 &data); 720 721 if (!iwl_mvm_has_new_rx_api(mvm)) 722 return; 723 724 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 725 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data; 726 727 energy = (void *)&v11->load_stats.avg_energy; 728 bytes = (void *)&v11->load_stats.byte_count; 729 air_time = (void *)&v11->load_stats.air_time; 730 } else { 731 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data; 732 733 energy = (void *)&stats->load_stats.avg_energy; 734 bytes = (void *)&stats->load_stats.byte_count; 735 air_time = (void *)&stats->load_stats.air_time; 736 } 737 738 rcu_read_lock(); 739 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 740 struct iwl_mvm_sta *sta; 741 742 if (!energy[i]) 743 continue; 744 745 sta = iwl_mvm_sta_from_staid_rcu(mvm, i); 746 if (!sta) 747 continue; 748 sta->avg_energy = energy[i]; 749 } 750 rcu_read_unlock(); 751 } 752 753 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 754 { 755 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); 756 } 757 758 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, 759 struct iwl_rx_cmd_buffer *rxb) 760 { 761 struct iwl_rx_packet *pkt = rxb_addr(rxb); 762 struct iwl_ba_window_status_notif *notif = (void *)pkt->data; 763 int i; 764 u32 pkt_len = iwl_rx_packet_payload_len(pkt); 765 766 if (WARN_ONCE(pkt_len != sizeof(*notif), 767 "Received window status notification of wrong size (%u)\n", 768 pkt_len)) 769 return; 770 771 rcu_read_lock(); 772 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { 773 struct ieee80211_sta *sta; 774 u8 sta_id, tid; 775 u64 bitmap; 776 u32 ssn; 777 u16 ratid; 778 u16 received_mpdu; 779 780 ratid = le16_to_cpu(notif->ra_tid[i]); 781 /* check that this TID is valid */ 782 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) 783 continue; 784 785 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); 786 if (received_mpdu == 0) 787 continue; 788 789 tid = ratid & BA_WINDOW_STATUS_TID_MSK; 790 /* get the station */ 791 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) 792 >> BA_WINDOW_STATUS_STA_ID_POS; 793 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 794 if (IS_ERR_OR_NULL(sta)) 795 continue; 796 bitmap = le64_to_cpu(notif->bitmap[i]); 797 ssn = le32_to_cpu(notif->start_seq_num[i]); 798 799 /* update mac80211 with the bitmap for the reordering buffer */ 800 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, 801 received_mpdu); 802 } 803 rcu_read_unlock(); 804 } 805