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_handle_tcm(struct iwl_mvm *mvm, 258 struct ieee80211_sta *sta, 259 struct ieee80211_hdr *hdr, u32 len, 260 struct iwl_rx_phy_info *phy_info, 261 u32 rate_n_flags) 262 { 263 struct iwl_mvm_sta *mvmsta; 264 struct iwl_mvm_tcm_mac *mdata; 265 int mac; 266 int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */ 267 struct iwl_mvm_vif *mvmvif; 268 /* expected throughput in 100Kbps, single stream, 20 MHz */ 269 static const u8 thresh_tpt[] = { 270 9, 18, 30, 42, 60, 78, 90, 96, 120, 135, 271 }; 272 u16 thr; 273 274 if (ieee80211_is_data_qos(hdr->frame_control)) 275 ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)]; 276 277 mvmsta = iwl_mvm_sta_from_mac80211(sta); 278 mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK; 279 280 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) 281 schedule_delayed_work(&mvm->tcm.work, 0); 282 mdata = &mvm->tcm.data[mac]; 283 mdata->rx.pkts[ac]++; 284 285 /* count the airtime only once for each ampdu */ 286 if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) { 287 mdata->rx.last_ampdu_ref = mvm->ampdu_ref; 288 mdata->rx.airtime += le16_to_cpu(phy_info->frame_time); 289 } 290 291 if (!(rate_n_flags & (RATE_MCS_HT_MSK | RATE_MCS_VHT_MSK))) 292 return; 293 294 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 295 296 if (mdata->opened_rx_ba_sessions || 297 mdata->uapsd_nonagg_detect.detected || 298 (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd && 299 !mvmvif->queue_params[IEEE80211_AC_VI].uapsd && 300 !mvmvif->queue_params[IEEE80211_AC_BE].uapsd && 301 !mvmvif->queue_params[IEEE80211_AC_BK].uapsd) || 302 mvmsta->sta_id != mvmvif->ap_sta_id) 303 return; 304 305 if (rate_n_flags & RATE_MCS_HT_MSK) { 306 thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK]; 307 thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK) >> 308 RATE_HT_MCS_NSS_POS); 309 } else { 310 if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >= 311 ARRAY_SIZE(thresh_tpt))) 312 return; 313 thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK]; 314 thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 315 RATE_VHT_MCS_NSS_POS); 316 } 317 318 thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) >> 319 RATE_MCS_CHAN_WIDTH_POS); 320 321 mdata->uapsd_nonagg_detect.rx_bytes += len; 322 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr); 323 } 324 325 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, 326 struct sk_buff *skb, 327 u32 status) 328 { 329 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 330 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); 331 332 if (mvmvif->features & NETIF_F_RXCSUM && 333 status & RX_MPDU_RES_STATUS_CSUM_DONE && 334 status & RX_MPDU_RES_STATUS_CSUM_OK) 335 skb->ip_summed = CHECKSUM_UNNECESSARY; 336 } 337 338 /* 339 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 340 * 341 * Handles the actual data of the Rx packet from the fw 342 */ 343 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, 344 struct iwl_rx_cmd_buffer *rxb) 345 { 346 struct ieee80211_hdr *hdr; 347 struct ieee80211_rx_status *rx_status; 348 struct iwl_rx_packet *pkt = rxb_addr(rxb); 349 struct iwl_rx_phy_info *phy_info; 350 struct iwl_rx_mpdu_res_start *rx_res; 351 struct ieee80211_sta *sta = NULL; 352 struct sk_buff *skb; 353 u32 len; 354 u32 rate_n_flags; 355 u32 rx_pkt_status; 356 u8 crypt_len = 0; 357 bool take_ref; 358 359 phy_info = &mvm->last_phy_info; 360 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 361 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 362 len = le16_to_cpu(rx_res->byte_count); 363 rx_pkt_status = le32_to_cpup((__le32 *) 364 (pkt->data + sizeof(*rx_res) + len)); 365 366 /* Dont use dev_alloc_skb(), we'll have enough headroom once 367 * ieee80211_hdr pulled. 368 */ 369 skb = alloc_skb(128, GFP_ATOMIC); 370 if (!skb) { 371 IWL_ERR(mvm, "alloc_skb failed\n"); 372 return; 373 } 374 375 rx_status = IEEE80211_SKB_RXCB(skb); 376 377 /* 378 * drop the packet if it has failed being decrypted by HW 379 */ 380 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, 381 &crypt_len)) { 382 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 383 rx_pkt_status); 384 kfree_skb(skb); 385 return; 386 } 387 388 /* 389 * Keep packets with CRC errors (and with overrun) for monitor mode 390 * (otherwise the firmware discards them) but mark them as bad. 391 */ 392 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 393 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 394 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 395 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; 396 } 397 398 /* This will be used in several places later */ 399 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 400 401 /* rx_status carries information about the packet to mac80211 */ 402 rx_status->mactime = le64_to_cpu(phy_info->timestamp); 403 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); 404 rx_status->band = 405 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 406 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 407 rx_status->freq = 408 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 409 rx_status->band); 410 411 /* TSF as indicated by the firmware is at INA time */ 412 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; 413 414 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); 415 416 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, 417 (unsigned long long)rx_status->mactime); 418 419 rcu_read_lock(); 420 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { 421 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; 422 423 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; 424 425 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { 426 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); 427 if (IS_ERR(sta)) 428 sta = NULL; 429 } 430 } else if (!is_multicast_ether_addr(hdr->addr2)) { 431 /* This is fine since we prevent two stations with the same 432 * address from being added. 433 */ 434 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 435 } 436 437 if (sta) { 438 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 439 struct ieee80211_vif *tx_blocked_vif = 440 rcu_dereference(mvm->csa_tx_blocked_vif); 441 442 /* We have tx blocked stations (with CS bit). If we heard 443 * frames from a blocked station on a new channel we can 444 * TX to it again. 445 */ 446 if (unlikely(tx_blocked_vif) && 447 mvmsta->vif == tx_blocked_vif) { 448 struct iwl_mvm_vif *mvmvif = 449 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 450 451 if (mvmvif->csa_target_freq == rx_status->freq) 452 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, 453 false); 454 } 455 456 rs_update_last_rssi(mvm, mvmsta, rx_status); 457 458 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && 459 ieee80211_is_beacon(hdr->frame_control)) { 460 struct iwl_fw_dbg_trigger_tlv *trig; 461 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; 462 bool trig_check; 463 s32 rssi; 464 465 trig = iwl_fw_dbg_get_trigger(mvm->fw, 466 FW_DBG_TRIGGER_RSSI); 467 rssi_trig = (void *)trig->data; 468 rssi = le32_to_cpu(rssi_trig->rssi); 469 470 trig_check = 471 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 472 ieee80211_vif_to_wdev(mvmsta->vif), 473 trig); 474 if (trig_check && rx_status->signal < rssi) 475 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 476 NULL); 477 } 478 479 if (!mvm->tcm.paused && len >= sizeof(*hdr) && 480 !is_multicast_ether_addr(hdr->addr1) && 481 ieee80211_is_data(hdr->frame_control)) 482 iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info, 483 rate_n_flags); 484 485 if (ieee80211_is_data(hdr->frame_control)) 486 iwl_mvm_rx_csum(sta, skb, rx_pkt_status); 487 } 488 rcu_read_unlock(); 489 490 /* set the preamble flag if appropriate */ 491 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 492 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 493 494 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 495 /* 496 * We know which subframes of an A-MPDU belong 497 * together since we get a single PHY response 498 * from the firmware for all of them 499 */ 500 rx_status->flag |= RX_FLAG_AMPDU_DETAILS; 501 rx_status->ampdu_reference = mvm->ampdu_ref; 502 } 503 504 /* Set up the HT phy flags */ 505 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 506 case RATE_MCS_CHAN_WIDTH_20: 507 break; 508 case RATE_MCS_CHAN_WIDTH_40: 509 rx_status->bw = RATE_INFO_BW_40; 510 break; 511 case RATE_MCS_CHAN_WIDTH_80: 512 rx_status->bw = RATE_INFO_BW_80; 513 break; 514 case RATE_MCS_CHAN_WIDTH_160: 515 rx_status->bw = RATE_INFO_BW_160; 516 break; 517 } 518 if (!(rate_n_flags & RATE_MCS_CCK_MSK) && 519 rate_n_flags & RATE_MCS_SGI_MSK) 520 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 521 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 522 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; 523 if (rate_n_flags & RATE_MCS_LDPC_MSK) 524 rx_status->enc_flags |= RX_ENC_FLAG_LDPC; 525 if (rate_n_flags & RATE_MCS_HT_MSK) { 526 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 527 RATE_MCS_STBC_POS; 528 rx_status->encoding = RX_ENC_HT; 529 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 530 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 531 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 532 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >> 533 RATE_MCS_STBC_POS; 534 rx_status->nss = 535 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 536 RATE_VHT_MCS_NSS_POS) + 1; 537 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 538 rx_status->encoding = RX_ENC_VHT; 539 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; 540 if (rate_n_flags & RATE_MCS_BF_MSK) 541 rx_status->enc_flags |= RX_ENC_FLAG_BF; 542 } else { 543 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 544 rx_status->band); 545 546 if (WARN(rate < 0 || rate > 0xFF, 547 "Invalid rate flags 0x%x, band %d,\n", 548 rate_n_flags, rx_status->band)) { 549 kfree_skb(skb); 550 return; 551 } 552 rx_status->rate_idx = rate; 553 } 554 555 #ifdef CONFIG_IWLWIFI_DEBUGFS 556 iwl_mvm_update_frame_stats(mvm, rate_n_flags, 557 rx_status->flag & RX_FLAG_AMPDU_DETAILS); 558 #endif 559 560 if (unlikely((ieee80211_is_beacon(hdr->frame_control) || 561 ieee80211_is_probe_resp(hdr->frame_control)) && 562 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) 563 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; 564 565 if (unlikely(ieee80211_is_beacon(hdr->frame_control) || 566 ieee80211_is_probe_resp(hdr->frame_control))) 567 rx_status->boottime_ns = ktime_get_boot_ns(); 568 569 /* Take a reference briefly to kick off a d0i3 entry delay so 570 * we can handle bursts of RX packets without toggling the 571 * state too often. But don't do this for beacons if we are 572 * going to idle because the beacon filtering changes we make 573 * cause the firmware to send us collateral beacons. */ 574 take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) && 575 ieee80211_is_beacon(hdr->frame_control)); 576 577 if (take_ref) 578 iwl_mvm_ref(mvm, IWL_MVM_REF_RX); 579 580 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, 581 crypt_len, rxb); 582 583 if (take_ref) 584 iwl_mvm_unref(mvm, IWL_MVM_REF_RX); 585 } 586 587 struct iwl_mvm_stat_data { 588 struct iwl_mvm *mvm; 589 __le32 mac_id; 590 u8 beacon_filter_average_energy; 591 void *general; 592 }; 593 594 static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 595 struct ieee80211_vif *vif) 596 { 597 struct iwl_mvm_stat_data *data = _data; 598 struct iwl_mvm *mvm = data->mvm; 599 int sig = -data->beacon_filter_average_energy; 600 int last_event; 601 int thold = vif->bss_conf.cqm_rssi_thold; 602 int hyst = vif->bss_conf.cqm_rssi_hyst; 603 u16 id = le32_to_cpu(data->mac_id); 604 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 605 606 /* This doesn't need the MAC ID check since it's not taking the 607 * data copied into the "data" struct, but rather the data from 608 * the notification directly. 609 */ 610 if (data->general) { 611 u16 vif_id = mvmvif->id; 612 613 if (iwl_mvm_is_cdb_supported(mvm)) { 614 struct mvm_statistics_general_cdb *general = 615 data->general; 616 617 mvmvif->beacon_stats.num_beacons = 618 le32_to_cpu(general->beacon_counter[vif_id]); 619 mvmvif->beacon_stats.avg_signal = 620 -general->beacon_average_energy[vif_id]; 621 } else { 622 struct mvm_statistics_general_v8 *general = 623 data->general; 624 625 mvmvif->beacon_stats.num_beacons = 626 le32_to_cpu(general->beacon_counter[vif_id]); 627 mvmvif->beacon_stats.avg_signal = 628 -general->beacon_average_energy[vif_id]; 629 } 630 } 631 632 if (mvmvif->id != id) 633 return; 634 635 if (vif->type != NL80211_IFTYPE_STATION) 636 return; 637 638 if (sig == 0) { 639 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); 640 return; 641 } 642 643 mvmvif->bf_data.ave_beacon_signal = sig; 644 645 /* BT Coex */ 646 if (mvmvif->bf_data.bt_coex_min_thold != 647 mvmvif->bf_data.bt_coex_max_thold) { 648 last_event = mvmvif->bf_data.last_bt_coex_event; 649 if (sig > mvmvif->bf_data.bt_coex_max_thold && 650 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 651 last_event == 0)) { 652 mvmvif->bf_data.last_bt_coex_event = sig; 653 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 654 sig); 655 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 656 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 657 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 658 last_event == 0)) { 659 mvmvif->bf_data.last_bt_coex_event = sig; 660 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 661 sig); 662 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 663 } 664 } 665 666 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 667 return; 668 669 /* CQM Notification */ 670 last_event = mvmvif->bf_data.last_cqm_event; 671 if (thold && sig < thold && (last_event == 0 || 672 sig < last_event - hyst)) { 673 mvmvif->bf_data.last_cqm_event = sig; 674 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 675 sig); 676 ieee80211_cqm_rssi_notify( 677 vif, 678 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 679 sig, 680 GFP_KERNEL); 681 } else if (sig > thold && 682 (last_event == 0 || sig > last_event + hyst)) { 683 mvmvif->bf_data.last_cqm_event = sig; 684 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 685 sig); 686 ieee80211_cqm_rssi_notify( 687 vif, 688 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 689 sig, 690 GFP_KERNEL); 691 } 692 } 693 694 static inline void 695 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) 696 { 697 struct iwl_fw_dbg_trigger_tlv *trig; 698 struct iwl_fw_dbg_trigger_stats *trig_stats; 699 u32 trig_offset, trig_thold; 700 701 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS)) 702 return; 703 704 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS); 705 trig_stats = (void *)trig->data; 706 707 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig)) 708 return; 709 710 trig_offset = le32_to_cpu(trig_stats->stop_offset); 711 trig_thold = le32_to_cpu(trig_stats->stop_threshold); 712 713 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) 714 return; 715 716 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) 717 return; 718 719 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL); 720 } 721 722 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, 723 struct iwl_rx_packet *pkt) 724 { 725 struct iwl_mvm_stat_data data = { 726 .mvm = mvm, 727 }; 728 int expected_size; 729 int i; 730 u8 *energy; 731 __le32 *bytes; 732 __le32 *air_time; 733 __le32 flags; 734 735 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 736 if (iwl_mvm_has_new_rx_api(mvm)) 737 expected_size = sizeof(struct iwl_notif_statistics_v11); 738 else 739 expected_size = sizeof(struct iwl_notif_statistics_v10); 740 } else { 741 expected_size = sizeof(struct iwl_notif_statistics_cdb); 742 } 743 744 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size, 745 "received invalid statistics size (%d)!\n", 746 iwl_rx_packet_payload_len(pkt))) 747 return; 748 749 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 750 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data; 751 752 data.mac_id = stats->rx.general.mac_id; 753 data.beacon_filter_average_energy = 754 stats->general.common.beacon_filter_average_energy; 755 756 mvm->rx_stats_v3 = stats->rx; 757 758 mvm->radio_stats.rx_time = 759 le64_to_cpu(stats->general.common.rx_time); 760 mvm->radio_stats.tx_time = 761 le64_to_cpu(stats->general.common.tx_time); 762 mvm->radio_stats.on_time_rf = 763 le64_to_cpu(stats->general.common.on_time_rf); 764 mvm->radio_stats.on_time_scan = 765 le64_to_cpu(stats->general.common.on_time_scan); 766 767 data.general = &stats->general; 768 769 flags = stats->flag; 770 } else { 771 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data; 772 773 data.mac_id = stats->rx.general.mac_id; 774 data.beacon_filter_average_energy = 775 stats->general.common.beacon_filter_average_energy; 776 777 mvm->rx_stats = stats->rx; 778 779 mvm->radio_stats.rx_time = 780 le64_to_cpu(stats->general.common.rx_time); 781 mvm->radio_stats.tx_time = 782 le64_to_cpu(stats->general.common.tx_time); 783 mvm->radio_stats.on_time_rf = 784 le64_to_cpu(stats->general.common.on_time_rf); 785 mvm->radio_stats.on_time_scan = 786 le64_to_cpu(stats->general.common.on_time_scan); 787 788 data.general = &stats->general; 789 790 flags = stats->flag; 791 } 792 793 iwl_mvm_rx_stats_check_trigger(mvm, pkt); 794 795 ieee80211_iterate_active_interfaces(mvm->hw, 796 IEEE80211_IFACE_ITER_NORMAL, 797 iwl_mvm_stat_iterator, 798 &data); 799 800 if (!iwl_mvm_has_new_rx_api(mvm)) 801 return; 802 803 if (!iwl_mvm_has_new_rx_stats_api(mvm)) { 804 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data; 805 806 energy = (void *)&v11->load_stats.avg_energy; 807 bytes = (void *)&v11->load_stats.byte_count; 808 air_time = (void *)&v11->load_stats.air_time; 809 } else { 810 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data; 811 812 energy = (void *)&stats->load_stats.avg_energy; 813 bytes = (void *)&stats->load_stats.byte_count; 814 air_time = (void *)&stats->load_stats.air_time; 815 } 816 817 rcu_read_lock(); 818 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 819 struct iwl_mvm_sta *sta; 820 821 if (!energy[i]) 822 continue; 823 824 sta = iwl_mvm_sta_from_staid_rcu(mvm, i); 825 if (!sta) 826 continue; 827 sta->avg_energy = energy[i]; 828 } 829 rcu_read_unlock(); 830 831 /* 832 * Don't update in case the statistics are not cleared, since 833 * we will end up counting twice the same airtime, once in TCM 834 * request and once in statistics notification. 835 */ 836 if (!(le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)) 837 return; 838 839 spin_lock(&mvm->tcm.lock); 840 for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) { 841 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i]; 842 u32 airtime = le32_to_cpu(air_time[i]); 843 u32 rx_bytes = le32_to_cpu(bytes[i]); 844 845 mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes; 846 if (airtime) { 847 /* re-init every time to store rate from FW */ 848 ewma_rate_init(&mdata->uapsd_nonagg_detect.rate); 849 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, 850 rx_bytes * 8 / airtime); 851 } 852 853 mdata->rx.airtime += airtime; 854 } 855 spin_unlock(&mvm->tcm.lock); 856 } 857 858 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 859 { 860 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); 861 } 862 863 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, 864 struct iwl_rx_cmd_buffer *rxb) 865 { 866 struct iwl_rx_packet *pkt = rxb_addr(rxb); 867 struct iwl_ba_window_status_notif *notif = (void *)pkt->data; 868 int i; 869 u32 pkt_len = iwl_rx_packet_payload_len(pkt); 870 871 if (WARN_ONCE(pkt_len != sizeof(*notif), 872 "Received window status notification of wrong size (%u)\n", 873 pkt_len)) 874 return; 875 876 rcu_read_lock(); 877 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { 878 struct ieee80211_sta *sta; 879 u8 sta_id, tid; 880 u64 bitmap; 881 u32 ssn; 882 u16 ratid; 883 u16 received_mpdu; 884 885 ratid = le16_to_cpu(notif->ra_tid[i]); 886 /* check that this TID is valid */ 887 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) 888 continue; 889 890 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); 891 if (received_mpdu == 0) 892 continue; 893 894 tid = ratid & BA_WINDOW_STATUS_TID_MSK; 895 /* get the station */ 896 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) 897 >> BA_WINDOW_STATUS_STA_ID_POS; 898 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 899 if (IS_ERR_OR_NULL(sta)) 900 continue; 901 bitmap = le64_to_cpu(notif->bitmap[i]); 902 ssn = le32_to_cpu(notif->start_seq_num[i]); 903 904 /* update mac80211 with the bitmap for the reordering buffer */ 905 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, 906 received_mpdu); 907 } 908 rcu_read_unlock(); 909 } 910