/****************************************************************************** * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * Copyright(c) 2015 - 2017 Intel Deutschland GmbH * Copyright (C) 2018 Intel Corporation * Copyright (C) 2019 Intel Corporation * Copyright (C) 2020 Intel Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * The full GNU General Public License is included in this distribution * in the file called COPYING. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * BSD LICENSE * * Copyright(c) 2015 - 2017 Intel Deutschland GmbH * Copyright (C) 2018 Intel Corporation * Copyright (C) 2019 Intel Corporation * Copyright (C) 2020 Intel Corporation * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * *****************************************************************************/ #include #include #include #include "mvm.h" #include "iwl-io.h" #include "iwl-prph.h" #include "constants.h" struct iwl_mvm_loc_entry { struct list_head list; u8 addr[ETH_ALEN]; u8 lci_len, civic_len; u8 buf[]; }; struct iwl_mvm_smooth_entry { struct list_head list; u8 addr[ETH_ALEN]; s64 rtt_avg; u64 host_time; }; struct iwl_mvm_ftm_pasn_entry { struct list_head list; u8 addr[ETH_ALEN]; u8 hltk[HLTK_11AZ_LEN]; u8 tk[TK_11AZ_LEN]; u8 cipher; u8 tx_pn[IEEE80211_CCMP_PN_LEN]; u8 rx_pn[IEEE80211_CCMP_PN_LEN]; }; int iwl_mvm_ftm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, u8 *addr, u32 cipher, u8 *tk, u32 tk_len, u8 *hltk, u32 hltk_len) { struct iwl_mvm_ftm_pasn_entry *pasn = kzalloc(sizeof(*pasn), GFP_KERNEL); u32 expected_tk_len; lockdep_assert_held(&mvm->mutex); if (!pasn) return -ENOBUFS; pasn->cipher = iwl_mvm_cipher_to_location_cipher(cipher); switch (pasn->cipher) { case IWL_LOCATION_CIPHER_CCMP_128: case IWL_LOCATION_CIPHER_GCMP_128: expected_tk_len = WLAN_KEY_LEN_CCMP; break; case IWL_LOCATION_CIPHER_GCMP_256: expected_tk_len = WLAN_KEY_LEN_GCMP_256; break; default: goto out; } /* * If associated to this AP and already have security context, * the TK is already configured for this station, so it * shouldn't be set again here. */ if (vif->bss_conf.assoc && !memcmp(addr, vif->bss_conf.bssid, ETH_ALEN)) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct ieee80211_sta *sta; rcu_read_lock(); sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]); if (!IS_ERR_OR_NULL(sta) && sta->mfp) expected_tk_len = 0; rcu_read_unlock(); } if (tk_len != expected_tk_len || hltk_len != sizeof(pasn->hltk)) { IWL_ERR(mvm, "Invalid key length: tk_len=%u hltk_len=%u\n", tk_len, hltk_len); goto out; } memcpy(pasn->addr, addr, sizeof(pasn->addr)); memcpy(pasn->hltk, hltk, sizeof(pasn->hltk)); if (tk && tk_len) memcpy(pasn->tk, tk, sizeof(pasn->tk)); list_add_tail(&pasn->list, &mvm->ftm_initiator.pasn_list); return 0; out: kfree(pasn); return -EINVAL; } void iwl_mvm_ftm_remove_pasn_sta(struct iwl_mvm *mvm, u8 *addr) { struct iwl_mvm_ftm_pasn_entry *entry, *prev; lockdep_assert_held(&mvm->mutex); list_for_each_entry_safe(entry, prev, &mvm->ftm_initiator.pasn_list, list) { if (memcmp(entry->addr, addr, sizeof(entry->addr))) continue; list_del(&entry->list); kfree(entry); return; } } static void iwl_mvm_ftm_reset(struct iwl_mvm *mvm) { struct iwl_mvm_loc_entry *e, *t; mvm->ftm_initiator.req = NULL; mvm->ftm_initiator.req_wdev = NULL; memset(mvm->ftm_initiator.responses, 0, sizeof(mvm->ftm_initiator.responses)); list_for_each_entry_safe(e, t, &mvm->ftm_initiator.loc_list, list) { list_del(&e->list); kfree(e); } } void iwl_mvm_ftm_restart(struct iwl_mvm *mvm) { struct cfg80211_pmsr_result result = { .status = NL80211_PMSR_STATUS_FAILURE, .final = 1, .host_time = ktime_get_boottime_ns(), .type = NL80211_PMSR_TYPE_FTM, }; int i; lockdep_assert_held(&mvm->mutex); if (!mvm->ftm_initiator.req) return; for (i = 0; i < mvm->ftm_initiator.req->n_peers; i++) { memcpy(result.addr, mvm->ftm_initiator.req->peers[i].addr, ETH_ALEN); result.ftm.burst_index = mvm->ftm_initiator.responses[i]; cfg80211_pmsr_report(mvm->ftm_initiator.req_wdev, mvm->ftm_initiator.req, &result, GFP_KERNEL); } cfg80211_pmsr_complete(mvm->ftm_initiator.req_wdev, mvm->ftm_initiator.req, GFP_KERNEL); iwl_mvm_ftm_reset(mvm); } void iwl_mvm_ftm_initiator_smooth_config(struct iwl_mvm *mvm) { INIT_LIST_HEAD(&mvm->ftm_initiator.smooth.resp); IWL_DEBUG_INFO(mvm, "enable=%u, alpha=%u, age_jiffies=%u, thresh=(%u:%u)\n", IWL_MVM_FTM_INITIATOR_ENABLE_SMOOTH, IWL_MVM_FTM_INITIATOR_SMOOTH_ALPHA, IWL_MVM_FTM_INITIATOR_SMOOTH_AGE_SEC * HZ, IWL_MVM_FTM_INITIATOR_SMOOTH_OVERSHOOT, IWL_MVM_FTM_INITIATOR_SMOOTH_UNDERSHOOT); } void iwl_mvm_ftm_initiator_smooth_stop(struct iwl_mvm *mvm) { struct iwl_mvm_smooth_entry *se, *st; list_for_each_entry_safe(se, st, &mvm->ftm_initiator.smooth.resp, list) { list_del(&se->list); kfree(se); } } static int iwl_ftm_range_request_status_to_err(enum iwl_tof_range_request_status s) { switch (s) { case IWL_TOF_RANGE_REQUEST_STATUS_SUCCESS: return 0; case IWL_TOF_RANGE_REQUEST_STATUS_BUSY: return -EBUSY; default: WARN_ON_ONCE(1); return -EIO; } } static void iwl_mvm_ftm_cmd_v5(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_tof_range_req_cmd_v5 *cmd, struct cfg80211_pmsr_request *req) { int i; cmd->request_id = req->cookie; cmd->num_of_ap = req->n_peers; /* use maximum for "no timeout" or bigger than what we can do */ if (!req->timeout || req->timeout > 255 * 100) cmd->req_timeout = 255; else cmd->req_timeout = DIV_ROUND_UP(req->timeout, 100); /* * We treat it always as random, since if not we'll * have filled our local address there instead. */ cmd->macaddr_random = 1; memcpy(cmd->macaddr_template, req->mac_addr, ETH_ALEN); for (i = 0; i < ETH_ALEN; i++) cmd->macaddr_mask[i] = ~req->mac_addr_mask[i]; if (vif->bss_conf.assoc) memcpy(cmd->range_req_bssid, vif->bss_conf.bssid, ETH_ALEN); else eth_broadcast_addr(cmd->range_req_bssid); } static void iwl_mvm_ftm_cmd_common(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_tof_range_req_cmd_v9 *cmd, struct cfg80211_pmsr_request *req) { int i; cmd->initiator_flags = cpu_to_le32(IWL_TOF_INITIATOR_FLAGS_MACADDR_RANDOM | IWL_TOF_INITIATOR_FLAGS_NON_ASAP_SUPPORT); cmd->request_id = req->cookie; cmd->num_of_ap = req->n_peers; /* * Use a large value for "no timeout". Don't use the maximum value * because of fw limitations. */ if (req->timeout) cmd->req_timeout_ms = cpu_to_le32(req->timeout); else cmd->req_timeout_ms = cpu_to_le32(0xfffff); memcpy(cmd->macaddr_template, req->mac_addr, ETH_ALEN); for (i = 0; i < ETH_ALEN; i++) cmd->macaddr_mask[i] = ~req->mac_addr_mask[i]; if (vif->bss_conf.assoc) { memcpy(cmd->range_req_bssid, vif->bss_conf.bssid, ETH_ALEN); /* AP's TSF is only relevant if associated */ for (i = 0; i < req->n_peers; i++) { if (req->peers[i].report_ap_tsf) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); cmd->tsf_mac_id = cpu_to_le32(mvmvif->id); return; } } } else { eth_broadcast_addr(cmd->range_req_bssid); } /* Don't report AP's TSF */ cmd->tsf_mac_id = cpu_to_le32(0xff); } static void iwl_mvm_ftm_cmd_v8(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_tof_range_req_cmd_v8 *cmd, struct cfg80211_pmsr_request *req) { iwl_mvm_ftm_cmd_common(mvm, vif, (void *)cmd, req); } static int iwl_mvm_ftm_target_chandef_v1(struct iwl_mvm *mvm, struct cfg80211_pmsr_request_peer *peer, u8 *channel, u8 *bandwidth, u8 *ctrl_ch_position) { u32 freq = peer->chandef.chan->center_freq; *channel = ieee80211_frequency_to_channel(freq); switch (peer->chandef.width) { case NL80211_CHAN_WIDTH_20_NOHT: *bandwidth = IWL_TOF_BW_20_LEGACY; break; case NL80211_CHAN_WIDTH_20: *bandwidth = IWL_TOF_BW_20_HT; break; case NL80211_CHAN_WIDTH_40: *bandwidth = IWL_TOF_BW_40; break; case NL80211_CHAN_WIDTH_80: *bandwidth = IWL_TOF_BW_80; break; default: IWL_ERR(mvm, "Unsupported BW in FTM request (%d)\n", peer->chandef.width); return -EINVAL; } *ctrl_ch_position = (peer->chandef.width > NL80211_CHAN_WIDTH_20) ? iwl_mvm_get_ctrl_pos(&peer->chandef) : 0; return 0; } static int iwl_mvm_ftm_target_chandef_v2(struct iwl_mvm *mvm, struct cfg80211_pmsr_request_peer *peer, u8 *channel, u8 *format_bw, u8 *ctrl_ch_position) { u32 freq = peer->chandef.chan->center_freq; *channel = ieee80211_frequency_to_channel(freq); switch (peer->chandef.width) { case NL80211_CHAN_WIDTH_20_NOHT: *format_bw = IWL_LOCATION_FRAME_FORMAT_LEGACY; *format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS; break; case NL80211_CHAN_WIDTH_20: *format_bw = IWL_LOCATION_FRAME_FORMAT_HT; *format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS; break; case NL80211_CHAN_WIDTH_40: *format_bw = IWL_LOCATION_FRAME_FORMAT_HT; *format_bw |= IWL_LOCATION_BW_40MHZ << LOCATION_BW_POS; break; case NL80211_CHAN_WIDTH_80: *format_bw = IWL_LOCATION_FRAME_FORMAT_VHT; *format_bw |= IWL_LOCATION_BW_80MHZ << LOCATION_BW_POS; break; default: IWL_ERR(mvm, "Unsupported BW in FTM request (%d)\n", peer->chandef.width); return -EINVAL; } /* non EDCA based measurement must use HE preamble */ if (peer->ftm.trigger_based || peer->ftm.non_trigger_based) *format_bw |= IWL_LOCATION_FRAME_FORMAT_HE; *ctrl_ch_position = (peer->chandef.width > NL80211_CHAN_WIDTH_20) ? iwl_mvm_get_ctrl_pos(&peer->chandef) : 0; return 0; } static int iwl_mvm_ftm_put_target_v2(struct iwl_mvm *mvm, struct cfg80211_pmsr_request_peer *peer, struct iwl_tof_range_req_ap_entry_v2 *target) { int ret; ret = iwl_mvm_ftm_target_chandef_v1(mvm, peer, &target->channel_num, &target->bandwidth, &target->ctrl_ch_position); if (ret) return ret; memcpy(target->bssid, peer->addr, ETH_ALEN); target->burst_period = cpu_to_le16(peer->ftm.burst_period); target->samples_per_burst = peer->ftm.ftms_per_burst; target->num_of_bursts = peer->ftm.num_bursts_exp; target->measure_type = 0; /* regular two-sided FTM */ target->retries_per_sample = peer->ftm.ftmr_retries; target->asap_mode = peer->ftm.asap; target->enable_dyn_ack = IWL_MVM_FTM_INITIATOR_DYNACK; if (peer->ftm.request_lci) target->location_req |= IWL_TOF_LOC_LCI; if (peer->ftm.request_civicloc) target->location_req |= IWL_TOF_LOC_CIVIC; target->algo_type = IWL_MVM_FTM_INITIATOR_ALGO; return 0; } #define FTM_PUT_FLAG(flag) (target->initiator_ap_flags |= \ cpu_to_le32(IWL_INITIATOR_AP_FLAGS_##flag)) static void iwl_mvm_ftm_put_target_common(struct iwl_mvm *mvm, struct cfg80211_pmsr_request_peer *peer, struct iwl_tof_range_req_ap_entry_v6 *target) { memcpy(target->bssid, peer->addr, ETH_ALEN); target->burst_period = cpu_to_le16(peer->ftm.burst_period); target->samples_per_burst = peer->ftm.ftms_per_burst; target->num_of_bursts = peer->ftm.num_bursts_exp; target->ftmr_max_retries = peer->ftm.ftmr_retries; target->initiator_ap_flags = cpu_to_le32(0); if (peer->ftm.asap) FTM_PUT_FLAG(ASAP); if (peer->ftm.request_lci) FTM_PUT_FLAG(LCI_REQUEST); if (peer->ftm.request_civicloc) FTM_PUT_FLAG(CIVIC_REQUEST); if (IWL_MVM_FTM_INITIATOR_DYNACK) FTM_PUT_FLAG(DYN_ACK); if (IWL_MVM_FTM_INITIATOR_ALGO == IWL_TOF_ALGO_TYPE_LINEAR_REG) FTM_PUT_FLAG(ALGO_LR); else if (IWL_MVM_FTM_INITIATOR_ALGO == IWL_TOF_ALGO_TYPE_FFT) FTM_PUT_FLAG(ALGO_FFT); if (peer->ftm.trigger_based) FTM_PUT_FLAG(TB); else if (peer->ftm.non_trigger_based) FTM_PUT_FLAG(NON_TB); } static int iwl_mvm_ftm_put_target_v3(struct iwl_mvm *mvm, struct cfg80211_pmsr_request_peer *peer, struct iwl_tof_range_req_ap_entry_v3 *target) { int ret; ret = iwl_mvm_ftm_target_chandef_v1(mvm, peer, &target->channel_num, &target->bandwidth, &target->ctrl_ch_position); if (ret) return ret; /* * Versions 3 and 4 has some common fields, so * iwl_mvm_ftm_put_target_common() can be used for version 7 too. */ iwl_mvm_ftm_put_target_common(mvm, peer, (void *)target); return 0; } static int iwl_mvm_ftm_put_target_v4(struct iwl_mvm *mvm, struct cfg80211_pmsr_request_peer *peer, struct iwl_tof_range_req_ap_entry_v4 *target) { int ret; ret = iwl_mvm_ftm_target_chandef_v2(mvm, peer, &target->channel_num, &target->format_bw, &target->ctrl_ch_position); if (ret) return ret; iwl_mvm_ftm_put_target_common(mvm, peer, (void *)target); return 0; } static int iwl_mvm_ftm_put_target(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_pmsr_request_peer *peer, struct iwl_tof_range_req_ap_entry_v6 *target) { int ret; ret = iwl_mvm_ftm_target_chandef_v2(mvm, peer, &target->channel_num, &target->format_bw, &target->ctrl_ch_position); if (ret) return ret; iwl_mvm_ftm_put_target_common(mvm, peer, target); if (vif->bss_conf.assoc && !memcmp(peer->addr, vif->bss_conf.bssid, ETH_ALEN)) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); target->sta_id = mvmvif->ap_sta_id; } else { target->sta_id = IWL_MVM_INVALID_STA; } /* * TODO: Beacon interval is currently unknown, so use the common value * of 100 TUs. */ target->beacon_interval = cpu_to_le16(100); return 0; } static int iwl_mvm_ftm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *hcmd) { u32 status; int err = iwl_mvm_send_cmd_status(mvm, hcmd, &status); if (!err && status) { IWL_ERR(mvm, "FTM range request command failure, status: %u\n", status); err = iwl_ftm_range_request_status_to_err(status); } return err; } static int iwl_mvm_ftm_start_v5(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_pmsr_request *req) { struct iwl_tof_range_req_cmd_v5 cmd_v5; struct iwl_host_cmd hcmd = { .id = iwl_cmd_id(TOF_RANGE_REQ_CMD, LOCATION_GROUP, 0), .dataflags[0] = IWL_HCMD_DFL_DUP, .data[0] = &cmd_v5, .len[0] = sizeof(cmd_v5), }; u8 i; int err; iwl_mvm_ftm_cmd_v5(mvm, vif, &cmd_v5, req); for (i = 0; i < cmd_v5.num_of_ap; i++) { struct cfg80211_pmsr_request_peer *peer = &req->peers[i]; err = iwl_mvm_ftm_put_target_v2(mvm, peer, &cmd_v5.ap[i]); if (err) return err; } return iwl_mvm_ftm_send_cmd(mvm, &hcmd); } static int iwl_mvm_ftm_start_v7(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_pmsr_request *req) { struct iwl_tof_range_req_cmd_v7 cmd_v7; struct iwl_host_cmd hcmd = { .id = iwl_cmd_id(TOF_RANGE_REQ_CMD, LOCATION_GROUP, 0), .dataflags[0] = IWL_HCMD_DFL_DUP, .data[0] = &cmd_v7, .len[0] = sizeof(cmd_v7), }; u8 i; int err; /* * Versions 7 and 8 has the same structure except from the responders * list, so iwl_mvm_ftm_cmd() can be used for version 7 too. */ iwl_mvm_ftm_cmd_v8(mvm, vif, (void *)&cmd_v7, req); for (i = 0; i < cmd_v7.num_of_ap; i++) { struct cfg80211_pmsr_request_peer *peer = &req->peers[i]; err = iwl_mvm_ftm_put_target_v3(mvm, peer, &cmd_v7.ap[i]); if (err) return err; } return iwl_mvm_ftm_send_cmd(mvm, &hcmd); } static int iwl_mvm_ftm_start_v8(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_pmsr_request *req) { struct iwl_tof_range_req_cmd_v8 cmd; struct iwl_host_cmd hcmd = { .id = iwl_cmd_id(TOF_RANGE_REQ_CMD, LOCATION_GROUP, 0), .dataflags[0] = IWL_HCMD_DFL_DUP, .data[0] = &cmd, .len[0] = sizeof(cmd), }; u8 i; int err; iwl_mvm_ftm_cmd_v8(mvm, vif, (void *)&cmd, req); for (i = 0; i < cmd.num_of_ap; i++) { struct cfg80211_pmsr_request_peer *peer = &req->peers[i]; err = iwl_mvm_ftm_put_target_v4(mvm, peer, &cmd.ap[i]); if (err) return err; } return iwl_mvm_ftm_send_cmd(mvm, &hcmd); } static int iwl_mvm_ftm_start_v9(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_pmsr_request *req) { struct iwl_tof_range_req_cmd_v9 cmd; struct iwl_host_cmd hcmd = { .id = iwl_cmd_id(TOF_RANGE_REQ_CMD, LOCATION_GROUP, 0), .dataflags[0] = IWL_HCMD_DFL_DUP, .data[0] = &cmd, .len[0] = sizeof(cmd), }; u8 i; int err; iwl_mvm_ftm_cmd_common(mvm, vif, &cmd, req); for (i = 0; i < cmd.num_of_ap; i++) { struct cfg80211_pmsr_request_peer *peer = &req->peers[i]; struct iwl_tof_range_req_ap_entry_v6 *target = &cmd.ap[i]; err = iwl_mvm_ftm_put_target(mvm, vif, peer, target); if (err) return err; } return iwl_mvm_ftm_send_cmd(mvm, &hcmd); } static void iter(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_key_conf *key, void *data) { struct iwl_tof_range_req_ap_entry_v6 *target = data; if (!sta || memcmp(sta->addr, target->bssid, ETH_ALEN)) return; WARN_ON(!sta->mfp); if (WARN_ON(key->keylen > sizeof(target->tk))) return; memcpy(target->tk, key->key, key->keylen); target->cipher = iwl_mvm_cipher_to_location_cipher(key->cipher); WARN_ON(target->cipher == IWL_LOCATION_CIPHER_INVALID); } static void iwl_mvm_ftm_set_secured_ranging(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_tof_range_req_ap_entry_v7 *target) { struct iwl_mvm_ftm_pasn_entry *entry; u32 flags = le32_to_cpu(target->initiator_ap_flags); if (!(flags & (IWL_INITIATOR_AP_FLAGS_NON_TB | IWL_INITIATOR_AP_FLAGS_TB))) return; lockdep_assert_held(&mvm->mutex); list_for_each_entry(entry, &mvm->ftm_initiator.pasn_list, list) { if (memcmp(entry->addr, target->bssid, sizeof(entry->addr))) continue; target->cipher = entry->cipher; memcpy(target->hltk, entry->hltk, sizeof(target->hltk)); if (vif->bss_conf.assoc && !memcmp(vif->bss_conf.bssid, target->bssid, sizeof(target->bssid))) ieee80211_iter_keys(mvm->hw, vif, iter, target); else memcpy(target->tk, entry->tk, sizeof(target->tk)); memcpy(target->rx_pn, entry->rx_pn, sizeof(target->rx_pn)); memcpy(target->tx_pn, entry->tx_pn, sizeof(target->tx_pn)); target->initiator_ap_flags |= cpu_to_le32(IWL_INITIATOR_AP_FLAGS_SECURED); return; } } static int iwl_mvm_ftm_start_v11(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_pmsr_request *req) { struct iwl_tof_range_req_cmd_v11 cmd; struct iwl_host_cmd hcmd = { .id = iwl_cmd_id(TOF_RANGE_REQ_CMD, LOCATION_GROUP, 0), .dataflags[0] = IWL_HCMD_DFL_DUP, .data[0] = &cmd, .len[0] = sizeof(cmd), }; u8 i; int err; iwl_mvm_ftm_cmd_common(mvm, vif, (void *)&cmd, req); for (i = 0; i < cmd.num_of_ap; i++) { struct cfg80211_pmsr_request_peer *peer = &req->peers[i]; struct iwl_tof_range_req_ap_entry_v7 *target = &cmd.ap[i]; err = iwl_mvm_ftm_put_target(mvm, vif, peer, (void *)target); if (err) return err; iwl_mvm_ftm_set_secured_ranging(mvm, vif, target); } return iwl_mvm_ftm_send_cmd(mvm, &hcmd); } int iwl_mvm_ftm_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_pmsr_request *req) { bool new_api = fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FTM_NEW_RANGE_REQ); int err; lockdep_assert_held(&mvm->mutex); if (mvm->ftm_initiator.req) return -EBUSY; if (new_api) { u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LOCATION_GROUP, TOF_RANGE_REQ_CMD, IWL_FW_CMD_VER_UNKNOWN); switch (cmd_ver) { case 11: err = iwl_mvm_ftm_start_v11(mvm, vif, req); break; case 9: case 10: err = iwl_mvm_ftm_start_v9(mvm, vif, req); break; case 8: err = iwl_mvm_ftm_start_v8(mvm, vif, req); break; default: err = iwl_mvm_ftm_start_v7(mvm, vif, req); break; } } else { err = iwl_mvm_ftm_start_v5(mvm, vif, req); } if (!err) { mvm->ftm_initiator.req = req; mvm->ftm_initiator.req_wdev = ieee80211_vif_to_wdev(vif); } return err; } void iwl_mvm_ftm_abort(struct iwl_mvm *mvm, struct cfg80211_pmsr_request *req) { struct iwl_tof_range_abort_cmd cmd = { .request_id = req->cookie, }; lockdep_assert_held(&mvm->mutex); if (req != mvm->ftm_initiator.req) return; iwl_mvm_ftm_reset(mvm); if (iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(TOF_RANGE_ABORT_CMD, LOCATION_GROUP, 0), 0, sizeof(cmd), &cmd)) IWL_ERR(mvm, "failed to abort FTM process\n"); } static int iwl_mvm_ftm_find_peer(struct cfg80211_pmsr_request *req, const u8 *addr) { int i; for (i = 0; i < req->n_peers; i++) { struct cfg80211_pmsr_request_peer *peer = &req->peers[i]; if (ether_addr_equal_unaligned(peer->addr, addr)) return i; } return -ENOENT; } static u64 iwl_mvm_ftm_get_host_time(struct iwl_mvm *mvm, __le32 fw_gp2_ts) { u32 gp2_ts = le32_to_cpu(fw_gp2_ts); u32 curr_gp2, diff; u64 now_from_boot_ns; iwl_mvm_get_sync_time(mvm, &curr_gp2, &now_from_boot_ns); if (curr_gp2 >= gp2_ts) diff = curr_gp2 - gp2_ts; else diff = curr_gp2 + (U32_MAX - gp2_ts + 1); return now_from_boot_ns - (u64)diff * 1000; } static void iwl_mvm_ftm_get_lci_civic(struct iwl_mvm *mvm, struct cfg80211_pmsr_result *res) { struct iwl_mvm_loc_entry *entry; list_for_each_entry(entry, &mvm->ftm_initiator.loc_list, list) { if (!ether_addr_equal_unaligned(res->addr, entry->addr)) continue; if (entry->lci_len) { res->ftm.lci_len = entry->lci_len; res->ftm.lci = entry->buf; } if (entry->civic_len) { res->ftm.civicloc_len = entry->civic_len; res->ftm.civicloc = entry->buf + entry->lci_len; } /* we found the entry we needed */ break; } } static int iwl_mvm_ftm_range_resp_valid(struct iwl_mvm *mvm, u8 request_id, u8 num_of_aps) { lockdep_assert_held(&mvm->mutex); if (request_id != (u8)mvm->ftm_initiator.req->cookie) { IWL_ERR(mvm, "Request ID mismatch, got %u, active %u\n", request_id, (u8)mvm->ftm_initiator.req->cookie); return -EINVAL; } if (num_of_aps > mvm->ftm_initiator.req->n_peers) { IWL_ERR(mvm, "FTM range response invalid\n"); return -EINVAL; } return 0; } static void iwl_mvm_ftm_rtt_smoothing(struct iwl_mvm *mvm, struct cfg80211_pmsr_result *res) { struct iwl_mvm_smooth_entry *resp; s64 rtt_avg, rtt = res->ftm.rtt_avg; u32 undershoot, overshoot; u8 alpha; bool found; if (!IWL_MVM_FTM_INITIATOR_ENABLE_SMOOTH) return; WARN_ON(rtt < 0); if (res->status != NL80211_PMSR_STATUS_SUCCESS) { IWL_DEBUG_INFO(mvm, ": %pM: ignore failed measurement. Status=%u\n", res->addr, res->status); return; } found = false; list_for_each_entry(resp, &mvm->ftm_initiator.smooth.resp, list) { if (!memcmp(res->addr, resp->addr, ETH_ALEN)) { found = true; break; } } if (!found) { resp = kzalloc(sizeof(*resp), GFP_KERNEL); if (!resp) return; memcpy(resp->addr, res->addr, ETH_ALEN); list_add_tail(&resp->list, &mvm->ftm_initiator.smooth.resp); resp->rtt_avg = rtt; IWL_DEBUG_INFO(mvm, "new: %pM: rtt_avg=%lld\n", resp->addr, resp->rtt_avg); goto update_time; } if (res->host_time - resp->host_time > IWL_MVM_FTM_INITIATOR_SMOOTH_AGE_SEC * 1000000000) { resp->rtt_avg = rtt; IWL_DEBUG_INFO(mvm, "expired: %pM: rtt_avg=%lld\n", resp->addr, resp->rtt_avg); goto update_time; } /* Smooth the results based on the tracked RTT average */ undershoot = IWL_MVM_FTM_INITIATOR_SMOOTH_UNDERSHOOT; overshoot = IWL_MVM_FTM_INITIATOR_SMOOTH_OVERSHOOT; alpha = IWL_MVM_FTM_INITIATOR_SMOOTH_ALPHA; rtt_avg = (alpha * rtt + (100 - alpha) * resp->rtt_avg) / 100; IWL_DEBUG_INFO(mvm, "%pM: prev rtt_avg=%lld, new rtt_avg=%lld, rtt=%lld\n", resp->addr, resp->rtt_avg, rtt_avg, rtt); /* * update the responder's average RTT results regardless of * the under/over shoot logic below */ resp->rtt_avg = rtt_avg; /* smooth the results */ if (rtt_avg > rtt && (rtt_avg - rtt) > undershoot) { res->ftm.rtt_avg = rtt_avg; IWL_DEBUG_INFO(mvm, "undershoot: val=%lld\n", (rtt_avg - rtt)); } else if (rtt_avg < rtt && (rtt - rtt_avg) > overshoot) { res->ftm.rtt_avg = rtt_avg; IWL_DEBUG_INFO(mvm, "overshoot: val=%lld\n", (rtt - rtt_avg)); } update_time: resp->host_time = res->host_time; } static void iwl_mvm_debug_range_resp(struct iwl_mvm *mvm, u8 index, struct cfg80211_pmsr_result *res) { s64 rtt_avg = div_s64(res->ftm.rtt_avg * 100, 6666); IWL_DEBUG_INFO(mvm, "entry %d\n", index); IWL_DEBUG_INFO(mvm, "\tstatus: %d\n", res->status); IWL_DEBUG_INFO(mvm, "\tBSSID: %pM\n", res->addr); IWL_DEBUG_INFO(mvm, "\thost time: %llu\n", res->host_time); IWL_DEBUG_INFO(mvm, "\tburst index: %hhu\n", res->ftm.burst_index); IWL_DEBUG_INFO(mvm, "\tsuccess num: %u\n", res->ftm.num_ftmr_successes); IWL_DEBUG_INFO(mvm, "\trssi: %d\n", res->ftm.rssi_avg); IWL_DEBUG_INFO(mvm, "\trssi spread: %hhu\n", res->ftm.rssi_spread); IWL_DEBUG_INFO(mvm, "\trtt: %lld\n", res->ftm.rtt_avg); IWL_DEBUG_INFO(mvm, "\trtt var: %llu\n", res->ftm.rtt_variance); IWL_DEBUG_INFO(mvm, "\trtt spread: %llu\n", res->ftm.rtt_spread); IWL_DEBUG_INFO(mvm, "\tdistance: %lld\n", rtt_avg); } static void iwl_mvm_ftm_pasn_update_pn(struct iwl_mvm *mvm, struct iwl_tof_range_rsp_ap_entry_ntfy_v6 *fw_ap) { struct iwl_mvm_ftm_pasn_entry *entry; lockdep_assert_held(&mvm->mutex); list_for_each_entry(entry, &mvm->ftm_initiator.pasn_list, list) { if (memcmp(fw_ap->bssid, entry->addr, sizeof(entry->addr))) continue; memcpy(entry->rx_pn, fw_ap->rx_pn, sizeof(entry->rx_pn)); memcpy(entry->tx_pn, fw_ap->tx_pn, sizeof(entry->tx_pn)); return; } } void iwl_mvm_ftm_range_resp(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) { struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl_tof_range_rsp_ntfy_v5 *fw_resp_v5 = (void *)pkt->data; struct iwl_tof_range_rsp_ntfy_v6 *fw_resp_v6 = (void *)pkt->data; struct iwl_tof_range_rsp_ntfy_v7 *fw_resp_v7 = (void *)pkt->data; struct iwl_tof_range_rsp_ntfy_v8 *fw_resp_v8 = (void *)pkt->data; int i; bool new_api = fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FTM_NEW_RANGE_REQ); u8 num_of_aps, last_in_batch; lockdep_assert_held(&mvm->mutex); if (!mvm->ftm_initiator.req) { return; } if (new_api) { if (iwl_mvm_ftm_range_resp_valid(mvm, fw_resp_v8->request_id, fw_resp_v8->num_of_aps)) return; num_of_aps = fw_resp_v8->num_of_aps; last_in_batch = fw_resp_v8->last_report; } else { if (iwl_mvm_ftm_range_resp_valid(mvm, fw_resp_v5->request_id, fw_resp_v5->num_of_aps)) return; num_of_aps = fw_resp_v5->num_of_aps; last_in_batch = fw_resp_v5->last_in_batch; } IWL_DEBUG_INFO(mvm, "Range response received\n"); IWL_DEBUG_INFO(mvm, "request id: %lld, num of entries: %hhu\n", mvm->ftm_initiator.req->cookie, num_of_aps); for (i = 0; i < num_of_aps && i < IWL_MVM_TOF_MAX_APS; i++) { struct cfg80211_pmsr_result result = {}; struct iwl_tof_range_rsp_ap_entry_ntfy_v6 *fw_ap; int peer_idx; if (new_api) { if (mvm->cmd_ver.range_resp == 8) { fw_ap = &fw_resp_v8->ap[i]; iwl_mvm_ftm_pasn_update_pn(mvm, fw_ap); } else if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FTM_RTT_ACCURACY)) { fw_ap = (void *)&fw_resp_v7->ap[i]; } else { fw_ap = (void *)&fw_resp_v6->ap[i]; } result.final = fw_ap->last_burst; result.ap_tsf = le32_to_cpu(fw_ap->start_tsf); result.ap_tsf_valid = 1; } else { /* the first part is the same for old and new APIs */ fw_ap = (void *)&fw_resp_v5->ap[i]; /* * FIXME: the firmware needs to report this, we don't * even know the number of bursts the responder picked * (if we asked it to) */ result.final = 0; } peer_idx = iwl_mvm_ftm_find_peer(mvm->ftm_initiator.req, fw_ap->bssid); if (peer_idx < 0) { IWL_WARN(mvm, "Unknown address (%pM, target #%d) in FTM response\n", fw_ap->bssid, i); continue; } switch (fw_ap->measure_status) { case IWL_TOF_ENTRY_SUCCESS: result.status = NL80211_PMSR_STATUS_SUCCESS; break; case IWL_TOF_ENTRY_TIMING_MEASURE_TIMEOUT: result.status = NL80211_PMSR_STATUS_TIMEOUT; break; case IWL_TOF_ENTRY_NO_RESPONSE: result.status = NL80211_PMSR_STATUS_FAILURE; result.ftm.failure_reason = NL80211_PMSR_FTM_FAILURE_NO_RESPONSE; break; case IWL_TOF_ENTRY_REQUEST_REJECTED: result.status = NL80211_PMSR_STATUS_FAILURE; result.ftm.failure_reason = NL80211_PMSR_FTM_FAILURE_PEER_BUSY; result.ftm.busy_retry_time = fw_ap->refusal_period; break; default: result.status = NL80211_PMSR_STATUS_FAILURE; result.ftm.failure_reason = NL80211_PMSR_FTM_FAILURE_UNSPECIFIED; break; } memcpy(result.addr, fw_ap->bssid, ETH_ALEN); result.host_time = iwl_mvm_ftm_get_host_time(mvm, fw_ap->timestamp); result.type = NL80211_PMSR_TYPE_FTM; result.ftm.burst_index = mvm->ftm_initiator.responses[peer_idx]; mvm->ftm_initiator.responses[peer_idx]++; result.ftm.rssi_avg = fw_ap->rssi; result.ftm.rssi_avg_valid = 1; result.ftm.rssi_spread = fw_ap->rssi_spread; result.ftm.rssi_spread_valid = 1; result.ftm.rtt_avg = (s32)le32_to_cpu(fw_ap->rtt); result.ftm.rtt_avg_valid = 1; result.ftm.rtt_variance = le32_to_cpu(fw_ap->rtt_variance); result.ftm.rtt_variance_valid = 1; result.ftm.rtt_spread = le32_to_cpu(fw_ap->rtt_spread); result.ftm.rtt_spread_valid = 1; iwl_mvm_ftm_get_lci_civic(mvm, &result); iwl_mvm_ftm_rtt_smoothing(mvm, &result); cfg80211_pmsr_report(mvm->ftm_initiator.req_wdev, mvm->ftm_initiator.req, &result, GFP_KERNEL); if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FTM_RTT_ACCURACY)) IWL_DEBUG_INFO(mvm, "RTT confidence: %hhu\n", fw_ap->rttConfidence); iwl_mvm_debug_range_resp(mvm, i, &result); } if (last_in_batch) { cfg80211_pmsr_complete(mvm->ftm_initiator.req_wdev, mvm->ftm_initiator.req, GFP_KERNEL); iwl_mvm_ftm_reset(mvm); } } void iwl_mvm_ftm_lc_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) { struct iwl_rx_packet *pkt = rxb_addr(rxb); const struct ieee80211_mgmt *mgmt = (void *)pkt->data; size_t len = iwl_rx_packet_payload_len(pkt); struct iwl_mvm_loc_entry *entry; const u8 *ies, *lci, *civic, *msr_ie; size_t ies_len, lci_len = 0, civic_len = 0; size_t baselen = IEEE80211_MIN_ACTION_SIZE + sizeof(mgmt->u.action.u.ftm); static const u8 rprt_type_lci = IEEE80211_SPCT_MSR_RPRT_TYPE_LCI; static const u8 rprt_type_civic = IEEE80211_SPCT_MSR_RPRT_TYPE_CIVIC; if (len <= baselen) return; lockdep_assert_held(&mvm->mutex); ies = mgmt->u.action.u.ftm.variable; ies_len = len - baselen; msr_ie = cfg80211_find_ie_match(WLAN_EID_MEASURE_REPORT, ies, ies_len, &rprt_type_lci, 1, 4); if (msr_ie) { lci = msr_ie + 2; lci_len = msr_ie[1]; } msr_ie = cfg80211_find_ie_match(WLAN_EID_MEASURE_REPORT, ies, ies_len, &rprt_type_civic, 1, 4); if (msr_ie) { civic = msr_ie + 2; civic_len = msr_ie[1]; } entry = kmalloc(sizeof(*entry) + lci_len + civic_len, GFP_KERNEL); if (!entry) return; memcpy(entry->addr, mgmt->bssid, ETH_ALEN); entry->lci_len = lci_len; if (lci_len) memcpy(entry->buf, lci, lci_len); entry->civic_len = civic_len; if (civic_len) memcpy(entry->buf + lci_len, civic, civic_len); list_add_tail(&entry->list, &mvm->ftm_initiator.loc_list); }