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673 lines
19 KiB
673 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause |
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/* |
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* Copyright (C) 2014 Intel Mobile Communications GmbH |
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* Copyright (C) 2017 Intel Deutschland GmbH |
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* Copyright (C) 2018-2020 Intel Corporation |
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*/ |
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#include <linux/etherdevice.h> |
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#include "mvm.h" |
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#include "time-event.h" |
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#include "iwl-io.h" |
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#include "iwl-prph.h" |
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|
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#define TU_TO_US(x) (x * 1024) |
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#define TU_TO_MS(x) (TU_TO_US(x) / 1000) |
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|
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void iwl_mvm_teardown_tdls_peers(struct iwl_mvm *mvm) |
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{ |
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struct ieee80211_sta *sta; |
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struct iwl_mvm_sta *mvmsta; |
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int i; |
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lockdep_assert_held(&mvm->mutex); |
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|
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for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) { |
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sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], |
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lockdep_is_held(&mvm->mutex)); |
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if (!sta || IS_ERR(sta) || !sta->tdls) |
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continue; |
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mvmsta = iwl_mvm_sta_from_mac80211(sta); |
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ieee80211_tdls_oper_request(mvmsta->vif, sta->addr, |
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NL80211_TDLS_TEARDOWN, |
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WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED, |
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GFP_KERNEL); |
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} |
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} |
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int iwl_mvm_tdls_sta_count(struct iwl_mvm *mvm, struct ieee80211_vif *vif) |
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{ |
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struct ieee80211_sta *sta; |
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struct iwl_mvm_sta *mvmsta; |
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int count = 0; |
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int i; |
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lockdep_assert_held(&mvm->mutex); |
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for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) { |
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sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], |
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lockdep_is_held(&mvm->mutex)); |
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if (!sta || IS_ERR(sta) || !sta->tdls) |
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continue; |
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if (vif) { |
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mvmsta = iwl_mvm_sta_from_mac80211(sta); |
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if (mvmsta->vif != vif) |
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continue; |
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} |
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count++; |
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} |
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return count; |
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} |
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static void iwl_mvm_tdls_config(struct iwl_mvm *mvm, struct ieee80211_vif *vif) |
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{ |
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struct iwl_rx_packet *pkt; |
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struct iwl_tdls_config_res *resp; |
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struct iwl_tdls_config_cmd tdls_cfg_cmd = {}; |
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struct iwl_host_cmd cmd = { |
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.id = TDLS_CONFIG_CMD, |
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.flags = CMD_WANT_SKB, |
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.data = { &tdls_cfg_cmd, }, |
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.len = { sizeof(struct iwl_tdls_config_cmd), }, |
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}; |
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struct ieee80211_sta *sta; |
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int ret, i, cnt; |
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struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
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lockdep_assert_held(&mvm->mutex); |
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tdls_cfg_cmd.id_and_color = |
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cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); |
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tdls_cfg_cmd.tx_to_ap_tid = IWL_MVM_TDLS_FW_TID; |
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tdls_cfg_cmd.tx_to_ap_ssn = cpu_to_le16(0); /* not used for now */ |
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/* for now the Tx cmd is empty and unused */ |
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/* populate TDLS peer data */ |
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cnt = 0; |
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for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) { |
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sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], |
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lockdep_is_held(&mvm->mutex)); |
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if (IS_ERR_OR_NULL(sta) || !sta->tdls) |
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continue; |
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tdls_cfg_cmd.sta_info[cnt].sta_id = i; |
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tdls_cfg_cmd.sta_info[cnt].tx_to_peer_tid = |
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IWL_MVM_TDLS_FW_TID; |
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tdls_cfg_cmd.sta_info[cnt].tx_to_peer_ssn = cpu_to_le16(0); |
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tdls_cfg_cmd.sta_info[cnt].is_initiator = |
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cpu_to_le32(sta->tdls_initiator ? 1 : 0); |
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cnt++; |
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} |
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tdls_cfg_cmd.tdls_peer_count = cnt; |
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IWL_DEBUG_TDLS(mvm, "send TDLS config to FW for %d peers\n", cnt); |
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ret = iwl_mvm_send_cmd(mvm, &cmd); |
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if (WARN_ON_ONCE(ret)) |
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return; |
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pkt = cmd.resp_pkt; |
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WARN_ON_ONCE(iwl_rx_packet_payload_len(pkt) != sizeof(*resp)); |
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/* we don't really care about the response at this point */ |
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iwl_free_resp(&cmd); |
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} |
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void iwl_mvm_recalc_tdls_state(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
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bool sta_added) |
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{ |
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int tdls_sta_cnt = iwl_mvm_tdls_sta_count(mvm, vif); |
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/* when the first peer joins, send a power update first */ |
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if (tdls_sta_cnt == 1 && sta_added) |
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iwl_mvm_power_update_mac(mvm); |
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|
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/* Configure the FW with TDLS peer info only if TDLS channel switch |
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* capability is set. |
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* TDLS config data is used currently only in TDLS channel switch code. |
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* Supposed to serve also TDLS buffer station which is not implemneted |
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* yet in FW*/ |
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if (fw_has_capa(&mvm->fw->ucode_capa, |
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IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) |
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iwl_mvm_tdls_config(mvm, vif); |
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/* when the last peer leaves, send a power update last */ |
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if (tdls_sta_cnt == 0 && !sta_added) |
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iwl_mvm_power_update_mac(mvm); |
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} |
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void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw, |
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struct ieee80211_vif *vif) |
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{ |
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struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); |
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u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int; |
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/* Protect the session to hear the TDLS setup response on the channel */ |
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mutex_lock(&mvm->mutex); |
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if (fw_has_capa(&mvm->fw->ucode_capa, |
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IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) |
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iwl_mvm_schedule_session_protection(mvm, vif, duration, |
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duration, true); |
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else |
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iwl_mvm_protect_session(mvm, vif, duration, |
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duration, 100, true); |
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mutex_unlock(&mvm->mutex); |
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} |
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static const char * |
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iwl_mvm_tdls_cs_state_str(enum iwl_mvm_tdls_cs_state state) |
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{ |
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switch (state) { |
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case IWL_MVM_TDLS_SW_IDLE: |
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return "IDLE"; |
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case IWL_MVM_TDLS_SW_REQ_SENT: |
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return "REQ SENT"; |
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case IWL_MVM_TDLS_SW_RESP_RCVD: |
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return "RESP RECEIVED"; |
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case IWL_MVM_TDLS_SW_REQ_RCVD: |
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return "REQ RECEIVED"; |
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case IWL_MVM_TDLS_SW_ACTIVE: |
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return "ACTIVE"; |
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} |
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return NULL; |
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} |
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static void iwl_mvm_tdls_update_cs_state(struct iwl_mvm *mvm, |
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enum iwl_mvm_tdls_cs_state state) |
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{ |
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if (mvm->tdls_cs.state == state) |
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return; |
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IWL_DEBUG_TDLS(mvm, "TDLS channel switch state: %s -> %s\n", |
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iwl_mvm_tdls_cs_state_str(mvm->tdls_cs.state), |
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iwl_mvm_tdls_cs_state_str(state)); |
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mvm->tdls_cs.state = state; |
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/* we only send requests to our switching peer - update sent time */ |
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if (state == IWL_MVM_TDLS_SW_REQ_SENT) |
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mvm->tdls_cs.peer.sent_timestamp = iwl_mvm_get_systime(mvm); |
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if (state == IWL_MVM_TDLS_SW_IDLE) |
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mvm->tdls_cs.cur_sta_id = IWL_MVM_INVALID_STA; |
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} |
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void iwl_mvm_rx_tdls_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
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{ |
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struct iwl_rx_packet *pkt = rxb_addr(rxb); |
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struct iwl_tdls_channel_switch_notif *notif = (void *)pkt->data; |
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struct ieee80211_sta *sta; |
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unsigned int delay; |
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struct iwl_mvm_sta *mvmsta; |
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struct ieee80211_vif *vif; |
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u32 sta_id = le32_to_cpu(notif->sta_id); |
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lockdep_assert_held(&mvm->mutex); |
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/* can fail sometimes */ |
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if (!le32_to_cpu(notif->status)) { |
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iwl_mvm_tdls_update_cs_state(mvm, IWL_MVM_TDLS_SW_IDLE); |
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return; |
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} |
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if (WARN_ON(sta_id >= mvm->fw->ucode_capa.num_stations)) |
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return; |
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sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], |
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lockdep_is_held(&mvm->mutex)); |
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/* the station may not be here, but if it is, it must be a TDLS peer */ |
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if (IS_ERR_OR_NULL(sta) || WARN_ON(!sta->tdls)) |
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return; |
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mvmsta = iwl_mvm_sta_from_mac80211(sta); |
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vif = mvmsta->vif; |
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/* |
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* Update state and possibly switch again after this is over (DTIM). |
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* Also convert TU to msec. |
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*/ |
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delay = TU_TO_MS(vif->bss_conf.dtim_period * vif->bss_conf.beacon_int); |
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mod_delayed_work(system_wq, &mvm->tdls_cs.dwork, |
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msecs_to_jiffies(delay)); |
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iwl_mvm_tdls_update_cs_state(mvm, IWL_MVM_TDLS_SW_ACTIVE); |
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} |
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static int |
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iwl_mvm_tdls_check_action(struct iwl_mvm *mvm, |
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enum iwl_tdls_channel_switch_type type, |
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const u8 *peer, bool peer_initiator, u32 timestamp) |
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{ |
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bool same_peer = false; |
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int ret = 0; |
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/* get the existing peer if it's there */ |
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if (mvm->tdls_cs.state != IWL_MVM_TDLS_SW_IDLE && |
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mvm->tdls_cs.cur_sta_id != IWL_MVM_INVALID_STA) { |
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struct ieee80211_sta *sta = rcu_dereference_protected( |
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mvm->fw_id_to_mac_id[mvm->tdls_cs.cur_sta_id], |
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lockdep_is_held(&mvm->mutex)); |
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if (!IS_ERR_OR_NULL(sta)) |
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same_peer = ether_addr_equal(peer, sta->addr); |
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} |
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switch (mvm->tdls_cs.state) { |
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case IWL_MVM_TDLS_SW_IDLE: |
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/* |
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* might be spurious packet from the peer after the switch is |
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* already done |
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*/ |
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if (type == TDLS_MOVE_CH) |
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ret = -EINVAL; |
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break; |
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case IWL_MVM_TDLS_SW_REQ_SENT: |
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/* only allow requests from the same peer */ |
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if (!same_peer) |
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ret = -EBUSY; |
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else if (type == TDLS_SEND_CHAN_SW_RESP_AND_MOVE_CH && |
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!peer_initiator) |
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/* |
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* We received a ch-switch request while an outgoing |
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* one is pending. Allow it if the peer is the link |
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* initiator. |
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*/ |
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ret = -EBUSY; |
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else if (type == TDLS_SEND_CHAN_SW_REQ) |
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/* wait for idle before sending another request */ |
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ret = -EBUSY; |
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else if (timestamp <= mvm->tdls_cs.peer.sent_timestamp) |
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/* we got a stale response - ignore it */ |
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ret = -EINVAL; |
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break; |
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case IWL_MVM_TDLS_SW_RESP_RCVD: |
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/* |
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* we are waiting for the FW to give an "active" notification, |
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* so ignore requests in the meantime |
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*/ |
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ret = -EBUSY; |
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break; |
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case IWL_MVM_TDLS_SW_REQ_RCVD: |
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/* as above, allow the link initiator to proceed */ |
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if (type == TDLS_SEND_CHAN_SW_REQ) { |
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if (!same_peer) |
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ret = -EBUSY; |
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else if (peer_initiator) /* they are the initiator */ |
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ret = -EBUSY; |
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} else if (type == TDLS_MOVE_CH) { |
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ret = -EINVAL; |
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} |
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break; |
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case IWL_MVM_TDLS_SW_ACTIVE: |
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/* |
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* the only valid request when active is a request to return |
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* to the base channel by the current off-channel peer |
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*/ |
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if (type != TDLS_MOVE_CH || !same_peer) |
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ret = -EBUSY; |
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break; |
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} |
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if (ret) |
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IWL_DEBUG_TDLS(mvm, |
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"Invalid TDLS action %d state %d peer %pM same_peer %d initiator %d\n", |
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type, mvm->tdls_cs.state, peer, same_peer, |
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peer_initiator); |
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return ret; |
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} |
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static int |
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iwl_mvm_tdls_config_channel_switch(struct iwl_mvm *mvm, |
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struct ieee80211_vif *vif, |
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enum iwl_tdls_channel_switch_type type, |
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const u8 *peer, bool peer_initiator, |
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u8 oper_class, |
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struct cfg80211_chan_def *chandef, |
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u32 timestamp, u16 switch_time, |
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u16 switch_timeout, struct sk_buff *skb, |
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u32 ch_sw_tm_ie) |
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{ |
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struct ieee80211_sta *sta; |
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struct iwl_mvm_sta *mvmsta; |
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struct ieee80211_tx_info *info; |
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struct ieee80211_hdr *hdr; |
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struct iwl_tdls_channel_switch_cmd cmd = {0}; |
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struct iwl_tdls_channel_switch_cmd_tail *tail = |
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iwl_mvm_chan_info_cmd_tail(mvm, &cmd.ci); |
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u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm); |
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int ret; |
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lockdep_assert_held(&mvm->mutex); |
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ret = iwl_mvm_tdls_check_action(mvm, type, peer, peer_initiator, |
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timestamp); |
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if (ret) |
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return ret; |
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if (!skb || WARN_ON(skb->len > IWL_TDLS_CH_SW_FRAME_MAX_SIZE)) { |
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ret = -EINVAL; |
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goto out; |
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} |
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cmd.switch_type = type; |
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tail->timing.frame_timestamp = cpu_to_le32(timestamp); |
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tail->timing.switch_time = cpu_to_le32(switch_time); |
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tail->timing.switch_timeout = cpu_to_le32(switch_timeout); |
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rcu_read_lock(); |
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sta = ieee80211_find_sta(vif, peer); |
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if (!sta) { |
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rcu_read_unlock(); |
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ret = -ENOENT; |
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goto out; |
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} |
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mvmsta = iwl_mvm_sta_from_mac80211(sta); |
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cmd.peer_sta_id = cpu_to_le32(mvmsta->sta_id); |
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|
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if (!chandef) { |
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if (mvm->tdls_cs.state == IWL_MVM_TDLS_SW_REQ_SENT && |
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mvm->tdls_cs.peer.chandef.chan) { |
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/* actually moving to the channel */ |
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chandef = &mvm->tdls_cs.peer.chandef; |
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} else if (mvm->tdls_cs.state == IWL_MVM_TDLS_SW_ACTIVE && |
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type == TDLS_MOVE_CH) { |
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/* we need to return to base channel */ |
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struct ieee80211_chanctx_conf *chanctx = |
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rcu_dereference(vif->chanctx_conf); |
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if (WARN_ON_ONCE(!chanctx)) { |
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rcu_read_unlock(); |
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goto out; |
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} |
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chandef = &chanctx->def; |
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} |
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} |
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if (chandef) |
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iwl_mvm_set_chan_info_chandef(mvm, &cmd.ci, chandef); |
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|
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/* keep quota calculation simple for now - 50% of DTIM for TDLS */ |
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tail->timing.max_offchan_duration = |
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cpu_to_le32(TU_TO_US(vif->bss_conf.dtim_period * |
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vif->bss_conf.beacon_int) / 2); |
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|
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/* Switch time is the first element in the switch-timing IE. */ |
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tail->frame.switch_time_offset = cpu_to_le32(ch_sw_tm_ie + 2); |
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|
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info = IEEE80211_SKB_CB(skb); |
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hdr = (void *)skb->data; |
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if (info->control.hw_key) { |
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if (info->control.hw_key->cipher != WLAN_CIPHER_SUITE_CCMP) { |
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rcu_read_unlock(); |
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ret = -EINVAL; |
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goto out; |
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} |
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iwl_mvm_set_tx_cmd_ccmp(info, &tail->frame.tx_cmd); |
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} |
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iwl_mvm_set_tx_cmd(mvm, skb, &tail->frame.tx_cmd, info, |
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mvmsta->sta_id); |
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|
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iwl_mvm_set_tx_cmd_rate(mvm, &tail->frame.tx_cmd, info, sta, |
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hdr->frame_control); |
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rcu_read_unlock(); |
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|
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memcpy(tail->frame.data, skb->data, skb->len); |
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|
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ret = iwl_mvm_send_cmd_pdu(mvm, TDLS_CHANNEL_SWITCH_CMD, 0, len, &cmd); |
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if (ret) { |
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IWL_ERR(mvm, "Failed to send TDLS_CHANNEL_SWITCH cmd: %d\n", |
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ret); |
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goto out; |
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} |
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|
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/* channel switch has started, update state */ |
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if (type != TDLS_MOVE_CH) { |
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mvm->tdls_cs.cur_sta_id = mvmsta->sta_id; |
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iwl_mvm_tdls_update_cs_state(mvm, |
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type == TDLS_SEND_CHAN_SW_REQ ? |
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IWL_MVM_TDLS_SW_REQ_SENT : |
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IWL_MVM_TDLS_SW_REQ_RCVD); |
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} else { |
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iwl_mvm_tdls_update_cs_state(mvm, IWL_MVM_TDLS_SW_RESP_RCVD); |
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} |
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|
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out: |
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|
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/* channel switch failed - we are idle */ |
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if (ret) |
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iwl_mvm_tdls_update_cs_state(mvm, IWL_MVM_TDLS_SW_IDLE); |
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|
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return ret; |
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} |
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|
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void iwl_mvm_tdls_ch_switch_work(struct work_struct *work) |
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{ |
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struct iwl_mvm *mvm; |
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struct ieee80211_sta *sta; |
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struct iwl_mvm_sta *mvmsta; |
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struct ieee80211_vif *vif; |
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unsigned int delay; |
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int ret; |
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|
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mvm = container_of(work, struct iwl_mvm, tdls_cs.dwork.work); |
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mutex_lock(&mvm->mutex); |
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|
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/* called after an active channel switch has finished or timed-out */ |
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iwl_mvm_tdls_update_cs_state(mvm, IWL_MVM_TDLS_SW_IDLE); |
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|
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/* station might be gone, in that case do nothing */ |
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if (mvm->tdls_cs.peer.sta_id == IWL_MVM_INVALID_STA) |
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goto out; |
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|
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sta = rcu_dereference_protected( |
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mvm->fw_id_to_mac_id[mvm->tdls_cs.peer.sta_id], |
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lockdep_is_held(&mvm->mutex)); |
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/* the station may not be here, but if it is, it must be a TDLS peer */ |
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if (!sta || IS_ERR(sta) || WARN_ON(!sta->tdls)) |
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goto out; |
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|
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mvmsta = iwl_mvm_sta_from_mac80211(sta); |
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vif = mvmsta->vif; |
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ret = iwl_mvm_tdls_config_channel_switch(mvm, vif, |
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TDLS_SEND_CHAN_SW_REQ, |
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sta->addr, |
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mvm->tdls_cs.peer.initiator, |
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mvm->tdls_cs.peer.op_class, |
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&mvm->tdls_cs.peer.chandef, |
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0, 0, 0, |
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mvm->tdls_cs.peer.skb, |
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mvm->tdls_cs.peer.ch_sw_tm_ie); |
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if (ret) |
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IWL_ERR(mvm, "Not sending TDLS channel switch: %d\n", ret); |
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|
|
/* retry after a DTIM if we failed sending now */ |
|
delay = TU_TO_MS(vif->bss_conf.dtim_period * vif->bss_conf.beacon_int); |
|
schedule_delayed_work(&mvm->tdls_cs.dwork, msecs_to_jiffies(delay)); |
|
out: |
|
mutex_unlock(&mvm->mutex); |
|
} |
|
|
|
int |
|
iwl_mvm_tdls_channel_switch(struct ieee80211_hw *hw, |
|
struct ieee80211_vif *vif, |
|
struct ieee80211_sta *sta, u8 oper_class, |
|
struct cfg80211_chan_def *chandef, |
|
struct sk_buff *tmpl_skb, u32 ch_sw_tm_ie) |
|
{ |
|
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); |
|
struct iwl_mvm_sta *mvmsta; |
|
unsigned int delay; |
|
int ret; |
|
|
|
mutex_lock(&mvm->mutex); |
|
|
|
IWL_DEBUG_TDLS(mvm, "TDLS channel switch with %pM ch %d width %d\n", |
|
sta->addr, chandef->chan->center_freq, chandef->width); |
|
|
|
/* we only support a single peer for channel switching */ |
|
if (mvm->tdls_cs.peer.sta_id != IWL_MVM_INVALID_STA) { |
|
IWL_DEBUG_TDLS(mvm, |
|
"Existing peer. Can't start switch with %pM\n", |
|
sta->addr); |
|
ret = -EBUSY; |
|
goto out; |
|
} |
|
|
|
ret = iwl_mvm_tdls_config_channel_switch(mvm, vif, |
|
TDLS_SEND_CHAN_SW_REQ, |
|
sta->addr, sta->tdls_initiator, |
|
oper_class, chandef, 0, 0, 0, |
|
tmpl_skb, ch_sw_tm_ie); |
|
if (ret) |
|
goto out; |
|
|
|
/* |
|
* Mark the peer as "in tdls switch" for this vif. We only allow a |
|
* single such peer per vif. |
|
*/ |
|
mvm->tdls_cs.peer.skb = skb_copy(tmpl_skb, GFP_KERNEL); |
|
if (!mvm->tdls_cs.peer.skb) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
mvmsta = iwl_mvm_sta_from_mac80211(sta); |
|
mvm->tdls_cs.peer.sta_id = mvmsta->sta_id; |
|
mvm->tdls_cs.peer.chandef = *chandef; |
|
mvm->tdls_cs.peer.initiator = sta->tdls_initiator; |
|
mvm->tdls_cs.peer.op_class = oper_class; |
|
mvm->tdls_cs.peer.ch_sw_tm_ie = ch_sw_tm_ie; |
|
|
|
/* |
|
* Wait for 2 DTIM periods before attempting the next switch. The next |
|
* switch will be made sooner if the current one completes before that. |
|
*/ |
|
delay = 2 * TU_TO_MS(vif->bss_conf.dtim_period * |
|
vif->bss_conf.beacon_int); |
|
mod_delayed_work(system_wq, &mvm->tdls_cs.dwork, |
|
msecs_to_jiffies(delay)); |
|
|
|
out: |
|
mutex_unlock(&mvm->mutex); |
|
return ret; |
|
} |
|
|
|
void iwl_mvm_tdls_cancel_channel_switch(struct ieee80211_hw *hw, |
|
struct ieee80211_vif *vif, |
|
struct ieee80211_sta *sta) |
|
{ |
|
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); |
|
struct ieee80211_sta *cur_sta; |
|
bool wait_for_phy = false; |
|
|
|
mutex_lock(&mvm->mutex); |
|
|
|
IWL_DEBUG_TDLS(mvm, "TDLS cancel channel switch with %pM\n", sta->addr); |
|
|
|
/* we only support a single peer for channel switching */ |
|
if (mvm->tdls_cs.peer.sta_id == IWL_MVM_INVALID_STA) { |
|
IWL_DEBUG_TDLS(mvm, "No ch switch peer - %pM\n", sta->addr); |
|
goto out; |
|
} |
|
|
|
cur_sta = rcu_dereference_protected( |
|
mvm->fw_id_to_mac_id[mvm->tdls_cs.peer.sta_id], |
|
lockdep_is_held(&mvm->mutex)); |
|
/* make sure it's the same peer */ |
|
if (cur_sta != sta) |
|
goto out; |
|
|
|
/* |
|
* If we're currently in a switch because of the now canceled peer, |
|
* wait a DTIM here to make sure the phy is back on the base channel. |
|
* We can't otherwise force it. |
|
*/ |
|
if (mvm->tdls_cs.cur_sta_id == mvm->tdls_cs.peer.sta_id && |
|
mvm->tdls_cs.state != IWL_MVM_TDLS_SW_IDLE) |
|
wait_for_phy = true; |
|
|
|
mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA; |
|
dev_kfree_skb(mvm->tdls_cs.peer.skb); |
|
mvm->tdls_cs.peer.skb = NULL; |
|
|
|
out: |
|
mutex_unlock(&mvm->mutex); |
|
|
|
/* make sure the phy is on the base channel */ |
|
if (wait_for_phy) |
|
msleep(TU_TO_MS(vif->bss_conf.dtim_period * |
|
vif->bss_conf.beacon_int)); |
|
|
|
/* flush the channel switch state */ |
|
flush_delayed_work(&mvm->tdls_cs.dwork); |
|
|
|
IWL_DEBUG_TDLS(mvm, "TDLS ending channel switch with %pM\n", sta->addr); |
|
} |
|
|
|
void |
|
iwl_mvm_tdls_recv_channel_switch(struct ieee80211_hw *hw, |
|
struct ieee80211_vif *vif, |
|
struct ieee80211_tdls_ch_sw_params *params) |
|
{ |
|
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); |
|
enum iwl_tdls_channel_switch_type type; |
|
unsigned int delay; |
|
const char *action_str = |
|
params->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ? |
|
"REQ" : "RESP"; |
|
|
|
mutex_lock(&mvm->mutex); |
|
|
|
IWL_DEBUG_TDLS(mvm, |
|
"Received TDLS ch switch action %s from %pM status %d\n", |
|
action_str, params->sta->addr, params->status); |
|
|
|
/* |
|
* we got a non-zero status from a peer we were switching to - move to |
|
* the idle state and retry again later |
|
*/ |
|
if (params->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE && |
|
params->status != 0 && |
|
mvm->tdls_cs.state == IWL_MVM_TDLS_SW_REQ_SENT && |
|
mvm->tdls_cs.cur_sta_id != IWL_MVM_INVALID_STA) { |
|
struct ieee80211_sta *cur_sta; |
|
|
|
/* make sure it's the same peer */ |
|
cur_sta = rcu_dereference_protected( |
|
mvm->fw_id_to_mac_id[mvm->tdls_cs.cur_sta_id], |
|
lockdep_is_held(&mvm->mutex)); |
|
if (cur_sta == params->sta) { |
|
iwl_mvm_tdls_update_cs_state(mvm, |
|
IWL_MVM_TDLS_SW_IDLE); |
|
goto retry; |
|
} |
|
} |
|
|
|
type = (params->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST) ? |
|
TDLS_SEND_CHAN_SW_RESP_AND_MOVE_CH : TDLS_MOVE_CH; |
|
|
|
iwl_mvm_tdls_config_channel_switch(mvm, vif, type, params->sta->addr, |
|
params->sta->tdls_initiator, 0, |
|
params->chandef, params->timestamp, |
|
params->switch_time, |
|
params->switch_timeout, |
|
params->tmpl_skb, |
|
params->ch_sw_tm_ie); |
|
|
|
retry: |
|
/* register a timeout in case we don't succeed in switching */ |
|
delay = vif->bss_conf.dtim_period * vif->bss_conf.beacon_int * |
|
1024 / 1000; |
|
mod_delayed_work(system_wq, &mvm->tdls_cs.dwork, |
|
msecs_to_jiffies(delay)); |
|
mutex_unlock(&mvm->mutex); |
|
}
|
|
|