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 (!fw_has_api(&mvm->fw->ucode_capa, 226 IWL_UCODE_TLV_API_DEPRECATE_TTAK) && 227 !(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) 228 return 0; 229 *crypt_len = IEEE80211_TKIP_IV_LEN; 230 /* fall through if TTAK OK */ 231 232 case RX_MPDU_RES_STATUS_SEC_WEP_ENC: 233 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) 234 return -1; 235 236 stats->flag |= RX_FLAG_DECRYPTED; 237 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 238 RX_MPDU_RES_STATUS_SEC_WEP_ENC) 239 *crypt_len = IEEE80211_WEP_IV_LEN; 240 return 0; 241 242 case RX_MPDU_RES_STATUS_SEC_EXT_ENC: 243 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 244 return -1; 245 stats->flag |= RX_FLAG_DECRYPTED; 246 return 0; 247 248 default: 249 /* Expected in monitor (not having the keys) */ 250 if (!mvm->monitor_on) 251 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); 252 } 253 254 return 0; 255 } 256 257 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 258 struct sk_buff *skb, 259 u32 status) 260 { 261 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 262 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 263 264 if (mvmvif->features & NETIF_F_RXCSUM && 265 status & RX_MPDU_RES_STATUS_CSUM_DONE && 266 status & RX_MPDU_RES_STATUS_CSUM_OK) 267 skb->ip_summed = CHECKSUM_UNNECESSARY; 268 } 269 270 /* 271 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 272 * 273 * Handles the actual data of the Rx packet from the fw 274 */ 275 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, 276 struct iwl_rx_cmd_buffer *rxb) 277 { 278 struct ieee80211_hdr *hdr; 279 struct ieee80211_rx_status *rx_status; 280 struct iwl_rx_packet *pkt = rxb_addr(rxb); 281 struct iwl_rx_phy_info *phy_info; 282 struct iwl_rx_mpdu_res_start *rx_res; 283 struct ieee80211_sta *sta = NULL; 284 struct sk_buff *skb; 285 u32 len; 286 u32 rate_n_flags; 287 u32 rx_pkt_status; 288 u8 crypt_len = 0; 289 bool take_ref; 290 291 phy_info = &mvm->last_phy_info; 292 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 293 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 294 len = le16_to_cpu(rx_res->byte_count); 295 rx_pkt_status = le32_to_cpup((__le32 *) 296 (pkt->data + sizeof(*rx_res) + len)); 297 298 /* Dont use dev_alloc_skb(), we'll have enough headroom once 299 * ieee80211_hdr pulled. 300 */ 301 skb = alloc_skb(128, GFP_ATOMIC); 302 if (!skb) { 303 IWL_ERR(mvm, "alloc_skb failed\n"); 304 return; 305 } 306 307 rx_status = IEEE80211_SKB_RXCB(skb); 308 309 /* 310 * drop the packet if it has failed being decrypted by HW 311 */ 312 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, 313 &crypt_len)) { 314 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 315 rx_pkt_status); 316 kfree_skb(skb); 317 return; 318 } 319 320 /* 321 * Keep packets with CRC errors (and with overrun) for monitor mode 322 * (otherwise the firmware discards them) but mark them as bad. 323 */ 324 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 325 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 326 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 327 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 328 } 329 330 /* This will be used in several places later */ 331 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 332 333 /* rx_status carries information about the packet to mac80211 */ 334 rx_status->mactime = le64_to_cpu(phy_info->timestamp); 335 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); 336 rx_status->band = 337 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 338 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 339 rx_status->freq = 340 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 341 rx_status->band); 342 343 /* TSF as indicated by the firmware is at INA time */ 344 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 345 346 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); 347 348 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, 349 (unsigned long long)rx_status->mactime); 350 351 rcu_read_lock(); 352 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { 353 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; 354 355 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; 356 357 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 358 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 359 if (IS_ERR(sta)) 360 sta = NULL; 361 } 362 } else if (!is_multicast_ether_addr(hdr->addr2)) { 363 /* This is fine since we prevent two stations with the same 364 * address from being added. 365 */ 366 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 367 } 368 369 if (sta) { 370 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 371 struct ieee80211_vif *tx_blocked_vif = 372 rcu_dereference(mvm->csa_tx_blocked_vif); 373 374 /* We have tx blocked stations (with CS bit). If we heard 375 * frames from a blocked station on a new channel we can 376 * TX to it again. 377 */ 378 if (unlikely(tx_blocked_vif) && 379 mvmsta->vif == tx_blocked_vif) { 380 struct iwl_mvm_vif *mvmvif = 381 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 382 383 if (mvmvif->csa_target_freq == rx_status->freq) 384 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 385 false); 386 } 387 388 rs_update_last_rssi(mvm, mvmsta, rx_status); 389 390 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && 391 ieee80211_is_beacon(hdr->frame_control)) { 392 struct iwl_fw_dbg_trigger_tlv *trig; 393 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 394 bool trig_check; 395 s32 rssi; 396 397 trig = iwl_fw_dbg_get_trigger(mvm->fw, 398 FW_DBG_TRIGGER_RSSI); 399 rssi_trig = (void *)trig->data; 400 rssi = le32_to_cpu(rssi_trig->rssi); 401 402 trig_check = 403 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 404 ieee80211_vif_to_wdev(mvmsta->vif), 405 trig); 406 if (trig_check && rx_status->signal < rssi) 407 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 408 NULL); 409 } 410 411 if (ieee80211_is_data(hdr->frame_control)) 412 iwl_mvm_rx_csum(sta, skb, rx_pkt_status); 413 } 414 rcu_read_unlock(); 415 416 /* set the preamble flag if appropriate */ 417 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 418 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 419 420 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 421 /* 422 * We know which subframes of an A-MPDU belong 423 * together since we get a single PHY response 424 * from the firmware for all of them 425 */ 426 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 427 rx_status->ampdu_reference = mvm->ampdu_ref; 428 } 429 430 /* Set up the HT phy flags */ 431 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 432 case RATE_MCS_CHAN_WIDTH_20: 433 break; 434 case RATE_MCS_CHAN_WIDTH_40: 435 rx_status->bw = RATE_INFO_BW_40; 436 break; 437 case RATE_MCS_CHAN_WIDTH_80: 438 rx_status->bw = RATE_INFO_BW_80; 439 break; 440 case RATE_MCS_CHAN_WIDTH_160: 441 rx_status->bw = RATE_INFO_BW_160; 442 break; 443 } 444 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 445 rate_n_flags & RATE_MCS_SGI_MSK) 446 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 447 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 448 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 449 if (rate_n_flags & RATE_MCS_LDPC_MSK) 450 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 451 if (rate_n_flags & RATE_MCS_HT_MSK) { 452 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 453 RATE_MCS_STBC_POS; 454 rx_status->encoding = RX_ENC_HT; 455 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 456 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 457 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 458 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 459 RATE_MCS_STBC_POS; 460 rx_status->nss = 461 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 462 RATE_VHT_MCS_NSS_POS) + 1; 463 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 464 rx_status->encoding = RX_ENC_VHT; 465 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 466 if (rate_n_flags & RATE_MCS_BF_MSK) 467 rx_status->enc_flags |= RX_ENC_FLAG_BF; 468 } else { 469 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 470 rx_status->band); 471 472 if (WARN(rate < 0 || rate > 0xFF, 473 "Invalid rate flags 0x%x, band %d,\n", 474 rate_n_flags, rx_status->band)) { 475 kfree_skb(skb); 476 return; 477 } 478 rx_status->rate_idx = rate; 479 } 480 481 #ifdef CONFIG_IWLWIFI_DEBUGFS 482 iwl_mvm_update_frame_stats(mvm, rate_n_flags, 483 rx_status->flag & RX_FLAG_AMPDU_DETAILS); 484 #endif 485 486 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 487 ieee80211_is_probe_resp(hdr->frame_control)) && 488 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) 489 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 490 491 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 492 ieee80211_is_probe_resp(hdr->frame_control))) 493 rx_status->boottime_ns = ktime_get_boot_ns(); 494 495 /* Take a reference briefly to kick off a d0i3 entry delay so 496 * we can handle bursts of RX packets without toggling the 497 * state too often. But don't do this for beacons if we are 498 * going to idle because the beacon filtering changes we make 499 * cause the firmware to send us collateral beacons. */ 500 take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) && 501 ieee80211_is_beacon(hdr->frame_control)); 502 503 if (take_ref) 504 iwl_mvm_ref(mvm, IWL_MVM_REF_RX); 505 506 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, 507 crypt_len, rxb); 508 509 if (take_ref) 510 iwl_mvm_unref(mvm, IWL_MVM_REF_RX); 511 } 512 513 struct iwl_mvm_stat_data { 514 struct iwl_mvm *mvm; 515 __le32 mac_id; 516 u8 beacon_filter_average_energy; 517 void *general; 518 }; 519 520 static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 521 struct ieee80211_vif *vif) 522 { 523 struct iwl_mvm_stat_data *data = _data; 524 struct iwl_mvm *mvm = data->mvm; 525 int sig = -data->beacon_filter_average_energy; 526 int last_event; 527 int thold = vif->bss_conf.cqm_rssi_thold; 528 int hyst = vif->bss_conf.cqm_rssi_hyst; 529 u16 id = le32_to_cpu(data->mac_id); 530 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 531 532 /* This doesn't need the MAC ID check since it's not taking the 533 * data copied into the "data" struct, but rather the data from 534 * the notification directly. 535 */ 536 if (data->general) { 537 u16 vif_id = mvmvif->id; 538 539 if (iwl_mvm_is_cdb_supported(mvm)) { 540 struct mvm_statistics_general_cdb *general = 541 data->general; 542 543 mvmvif->beacon_stats.num_beacons = 544 le32_to_cpu(general->beacon_counter[vif_id]); 545 mvmvif->beacon_stats.avg_signal = 546 -general->beacon_average_energy[vif_id]; 547 } else { 548 struct mvm_statistics_general_v8 *general = 549 data->general; 550 551 mvmvif->beacon_stats.num_beacons = 552 le32_to_cpu(general->beacon_counter[vif_id]); 553 mvmvif->beacon_stats.avg_signal = 554 -general->beacon_average_energy[vif_id]; 555 } 556 } 557 558 if (mvmvif->id != id) 559 return; 560 561 if (vif->type != NL80211_IFTYPE_STATION) 562 return; 563 564 if (sig == 0) { 565 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); 566 return; 567 } 568 569 mvmvif->bf_data.ave_beacon_signal = sig; 570 571 /* BT Coex */ 572 if (mvmvif->bf_data.bt_coex_min_thold != 573 mvmvif->bf_data.bt_coex_max_thold) { 574 last_event = mvmvif->bf_data.last_bt_coex_event; 575 if (sig > mvmvif->bf_data.bt_coex_max_thold && 576 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 577 last_event == 0)) { 578 mvmvif->bf_data.last_bt_coex_event = sig; 579 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 580 sig); 581 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 582 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 583 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 584 last_event == 0)) { 585 mvmvif->bf_data.last_bt_coex_event = sig; 586 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 587 sig); 588 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 589 } 590 } 591 592 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 593 return; 594 595 /* CQM Notification */ 596 last_event = mvmvif->bf_data.last_cqm_event; 597 if (thold && sig < thold && (last_event == 0 || 598 sig < last_event - hyst)) { 599 mvmvif->bf_data.last_cqm_event = sig; 600 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 601 sig); 602 ieee80211_cqm_rssi_notify( 603 vif, 604 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 605 sig, 606 GFP_KERNEL); 607 } else if (sig > thold && 608 (last_event == 0 || sig > last_event + hyst)) { 609 mvmvif->bf_data.last_cqm_event = sig; 610 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 611 sig); 612 ieee80211_cqm_rssi_notify( 613 vif, 614 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 615 sig, 616 GFP_KERNEL); 617 } 618 } 619 620 static inline void 621 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) 622 { 623 struct iwl_fw_dbg_trigger_tlv *trig; 624 struct iwl_fw_dbg_trigger_stats *trig_stats; 625 u32 trig_offset, trig_thold; 626 627 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS)) 628 return; 629 630 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS); 631 trig_stats = (void *)trig->data; 632 633 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig)) 634 return; 635 636 trig_offset = le32_to_cpu(trig_stats->stop_offset); 637 trig_thold = le32_to_cpu(trig_stats->stop_threshold); 638 639 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) 640 return; 641 642 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) 643 return; 644 645 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL); 646 } 647 648 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, 649 struct iwl_rx_packet *pkt) 650 { 651 struct iwl_mvm_stat_data data = { 652 .mvm = mvm, 653 }; 654 int expected_size; 655 int i; 656 u8 *energy; 657 __le32 *bytes, *air_time; 658 __le32 flags; 659 660 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 661 if (iwl_mvm_has_new_rx_api(mvm)) 662 expected_size = sizeof(struct iwl_notif_statistics_v11); 663 else 664 expected_size = sizeof(struct iwl_notif_statistics_v10); 665 } else { 666 expected_size = sizeof(struct iwl_notif_statistics_cdb); 667 } 668 669 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size, 670 "received invalid statistics size (%d)!\n", 671 iwl_rx_packet_payload_len(pkt))) 672 return; 673 674 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 675 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data; 676 677 data.mac_id = stats->rx.general.mac_id; 678 data.beacon_filter_average_energy = 679 stats->general.common.beacon_filter_average_energy; 680 681 mvm->rx_stats_v3 = stats->rx; 682 683 mvm->radio_stats.rx_time = 684 le64_to_cpu(stats->general.common.rx_time); 685 mvm->radio_stats.tx_time = 686 le64_to_cpu(stats->general.common.tx_time); 687 mvm->radio_stats.on_time_rf = 688 le64_to_cpu(stats->general.common.on_time_rf); 689 mvm->radio_stats.on_time_scan = 690 le64_to_cpu(stats->general.common.on_time_scan); 691 692 data.general = &stats->general; 693 694 flags = stats->flag; 695 } else { 696 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data; 697 698 data.mac_id = stats->rx.general.mac_id; 699 data.beacon_filter_average_energy = 700 stats->general.common.beacon_filter_average_energy; 701 702 mvm->rx_stats = stats->rx; 703 704 mvm->radio_stats.rx_time = 705 le64_to_cpu(stats->general.common.rx_time); 706 mvm->radio_stats.tx_time = 707 le64_to_cpu(stats->general.common.tx_time); 708 mvm->radio_stats.on_time_rf = 709 le64_to_cpu(stats->general.common.on_time_rf); 710 mvm->radio_stats.on_time_scan = 711 le64_to_cpu(stats->general.common.on_time_scan); 712 713 data.general = &stats->general; 714 715 flags = stats->flag; 716 } 717 718 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 719 720 ieee80211_iterate_active_interfaces(mvm->hw, 721 IEEE80211_IFACE_ITER_NORMAL, 722 iwl_mvm_stat_iterator, 723 &data); 724 725 if (!iwl_mvm_has_new_rx_api(mvm)) 726 return; 727 728 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 729 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data; 730 731 energy = (void *)&v11->load_stats.avg_energy; 732 bytes = (void *)&v11->load_stats.byte_count; 733 air_time = (void *)&v11->load_stats.air_time; 734 } else { 735 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data; 736 737 energy = (void *)&stats->load_stats.avg_energy; 738 bytes = (void *)&stats->load_stats.byte_count; 739 air_time = (void *)&stats->load_stats.air_time; 740 } 741 742 rcu_read_lock(); 743 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 744 struct iwl_mvm_sta *sta; 745 746 if (!energy[i]) 747 continue; 748 749 sta = iwl_mvm_sta_from_staid_rcu(mvm, i); 750 if (!sta) 751 continue; 752 sta->avg_energy = energy[i]; 753 } 754 rcu_read_unlock(); 755 } 756 757 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 758 { 759 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); 760 } 761 762 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, 763 struct iwl_rx_cmd_buffer *rxb) 764 { 765 struct iwl_rx_packet *pkt = rxb_addr(rxb); 766 struct iwl_ba_window_status_notif *notif = (void *)pkt->data; 767 int i; 768 u32 pkt_len = iwl_rx_packet_payload_len(pkt); 769 770 if (WARN_ONCE(pkt_len != sizeof(*notif), 771 "Received window status notification of wrong size (%u)\n", 772 pkt_len)) 773 return; 774 775 rcu_read_lock(); 776 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { 777 struct ieee80211_sta *sta; 778 u8 sta_id, tid; 779 u64 bitmap; 780 u32 ssn; 781 u16 ratid; 782 u16 received_mpdu; 783 784 ratid = le16_to_cpu(notif->ra_tid[i]); 785 /* check that this TID is valid */ 786 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) 787 continue; 788 789 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); 790 if (received_mpdu == 0) 791 continue; 792 793 tid = ratid & BA_WINDOW_STATUS_TID_MSK; 794 /* get the station */ 795 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) 796 >> BA_WINDOW_STATUS_STA_ID_POS; 797 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 798 if (IS_ERR_OR_NULL(sta)) 799 continue; 800 bitmap = le64_to_cpu(notif->bitmap[i]); 801 ssn = le32_to_cpu(notif->start_seq_num[i]); 802 803 /* update mac80211 with the bitmap for the reordering buffer */ 804 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, 805 received_mpdu); 806 } 807 rcu_read_unlock(); 808 } 809