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+/******************************************************************************
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+ *
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+ * This file is provided under a dual BSD/GPLv2 license. When using or
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+ * redistributing this file, you may do so under either license.
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+ *
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+ * GPL LICENSE SUMMARY
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+ *
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+ * Copyright(c) 2014 Intel Mobile Communications GmbH
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of version 2 of the GNU General Public License as
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+ * published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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+ * USA
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+ *
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+ * The full GNU General Public License is included in this distribution
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+ * in the file called COPYING.
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+ *
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+ * Contact Information:
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+ * Intel Linux Wireless <ilw@linux.intel.com>
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+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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+ *
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+ * BSD LICENSE
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+ *
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+ * Copyright(c) 2014 Intel Mobile Communications GmbH
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+ * All rights reserved.
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+ *
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+ * Redistribution and use in source and binary forms, with or without
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+ * modification, are permitted provided that the following conditions
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+ * are met:
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+ *
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+ * * Redistributions of source code must retain the above copyright
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+ * notice, this list of conditions and the following disclaimer.
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+ * * Redistributions in binary form must reproduce the above copyright
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+ * notice, this list of conditions and the following disclaimer in
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+ * the documentation and/or other materials provided with the
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+ * distribution.
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+ * * Neither the name Intel Corporation nor the names of its
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+ * contributors may be used to endorse or promote products derived
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+ * from this software without specific prior written permission.
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+ *
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+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+ *
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+ *****************************************************************************/
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+
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+#include "mvm.h"
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+#include "time-event.h"
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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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+
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+ lockdep_assert_held(&mvm->mutex);
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+
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+ for (i = 0; i < IWL_MVM_STATION_COUNT; 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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+
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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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+
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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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+
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+ lockdep_assert_held(&mvm->mutex);
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+
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+ for (i = 0; i < IWL_MVM_STATION_COUNT; 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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+
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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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+
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+ count++;
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+ }
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+
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+ return count;
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+}
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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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+
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+ /*
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+ * Disable ps when the first TDLS sta is added and re-enable it
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+ * when the last TDLS sta is removed
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+ */
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+ if ((tdls_sta_cnt == 1 && sta_added) ||
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+ (tdls_sta_cnt == 0 && !sta_added))
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+ iwl_mvm_power_update_mac(mvm);
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+}
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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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+
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+ /*
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+ * iwl_mvm_protect_session() reads directly from the device
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+ * (the system time), so make sure it is available.
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+ */
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+ if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_TDLS))
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+ return;
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+
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+ mutex_lock(&mvm->mutex);
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+ /* Protect the session to hear the TDLS setup response on the channel */
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+ iwl_mvm_protect_session(mvm, vif, duration, duration, 100, true);
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+ mutex_unlock(&mvm->mutex);
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+
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+ iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_TDLS);
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+}
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Arik Nemtsov