+++ /dev/null
-/******************************************************************************
- *
- * 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) 2014 Intel Mobile Communications GmbH
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
- * USA
- *
- * The full GNU General Public License is included in this distribution
- * in the file called COPYING.
- *
- * Contact Information:
- * Intel Linux Wireless <ilw@linux.intel.com>
- * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
- *
- * BSD LICENSE
- *
- * Copyright(c) 2014 Intel Mobile Communications GmbH
- * 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 <linux/etherdevice.h>
-#include "mvm.h"
-#include "time-event.h"
-#include "iwl-io.h"
-#include "iwl-prph.h"
-
-#define TU_TO_US(x) (x * 1024)
-#define TU_TO_MS(x) (TU_TO_US(x) / 1000)
-
-void iwl_mvm_teardown_tdls_peers(struct iwl_mvm *mvm)
-{
- struct ieee80211_sta *sta;
- struct iwl_mvm_sta *mvmsta;
- int i;
-
- lockdep_assert_held(&mvm->mutex);
-
- for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
- sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
- lockdep_is_held(&mvm->mutex));
- if (!sta || IS_ERR(sta) || !sta->tdls)
- continue;
-
- mvmsta = iwl_mvm_sta_from_mac80211(sta);
- ieee80211_tdls_oper_request(mvmsta->vif, sta->addr,
- NL80211_TDLS_TEARDOWN,
- WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED,
- GFP_KERNEL);
- }
-}
-
-int iwl_mvm_tdls_sta_count(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
-{
- struct ieee80211_sta *sta;
- struct iwl_mvm_sta *mvmsta;
- int count = 0;
- int i;
-
- lockdep_assert_held(&mvm->mutex);
-
- for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
- sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
- lockdep_is_held(&mvm->mutex));
- if (!sta || IS_ERR(sta) || !sta->tdls)
- continue;
-
- if (vif) {
- mvmsta = iwl_mvm_sta_from_mac80211(sta);
- if (mvmsta->vif != vif)
- continue;
- }
-
- count++;
- }
-
- return count;
-}
-
-static void iwl_mvm_tdls_config(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
-{
- struct iwl_rx_packet *pkt;
- struct iwl_tdls_config_res *resp;
- struct iwl_tdls_config_cmd tdls_cfg_cmd = {};
- struct iwl_host_cmd cmd = {
- .id = TDLS_CONFIG_CMD,
- .flags = CMD_WANT_SKB,
- .data = { &tdls_cfg_cmd, },
- .len = { sizeof(struct iwl_tdls_config_cmd), },
- };
- struct ieee80211_sta *sta;
- int ret, i, cnt;
- struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
-
- lockdep_assert_held(&mvm->mutex);
-
- tdls_cfg_cmd.id_and_color =
- cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color));
- tdls_cfg_cmd.tx_to_ap_tid = IWL_MVM_TDLS_FW_TID;
- tdls_cfg_cmd.tx_to_ap_ssn = cpu_to_le16(0); /* not used for now */
-
- /* for now the Tx cmd is empty and unused */
-
- /* populate TDLS peer data */
- cnt = 0;
- for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
- sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
- lockdep_is_held(&mvm->mutex));
- if (IS_ERR_OR_NULL(sta) || !sta->tdls)
- continue;
-
- tdls_cfg_cmd.sta_info[cnt].sta_id = i;
- tdls_cfg_cmd.sta_info[cnt].tx_to_peer_tid =
- IWL_MVM_TDLS_FW_TID;
- tdls_cfg_cmd.sta_info[cnt].tx_to_peer_ssn = cpu_to_le16(0);
- tdls_cfg_cmd.sta_info[cnt].is_initiator =
- cpu_to_le32(sta->tdls_initiator ? 1 : 0);
-
- cnt++;
- }
-
- tdls_cfg_cmd.tdls_peer_count = cnt;
- IWL_DEBUG_TDLS(mvm, "send TDLS config to FW for %d peers\n", cnt);
-
- ret = iwl_mvm_send_cmd(mvm, &cmd);
- if (WARN_ON_ONCE(ret))
- return;
-
- pkt = cmd.resp_pkt;
-
- WARN_ON_ONCE(iwl_rx_packet_payload_len(pkt) != sizeof(*resp));
-
- /* we don't really care about the response at this point */
-
- iwl_free_resp(&cmd);
-}
-
-void iwl_mvm_recalc_tdls_state(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
- bool sta_added)
-{
- int tdls_sta_cnt = iwl_mvm_tdls_sta_count(mvm, vif);
-
- /* when the first peer joins, send a power update first */
- if (tdls_sta_cnt == 1 && sta_added)
- iwl_mvm_power_update_mac(mvm);
-
- /* configure the FW with TDLS peer info */
- iwl_mvm_tdls_config(mvm, vif);
-
- /* when the last peer leaves, send a power update last */
- if (tdls_sta_cnt == 0 && !sta_added)
- iwl_mvm_power_update_mac(mvm);
-}
-
-void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif)
-{
- struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
- u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;
-
- /*
- * iwl_mvm_protect_session() reads directly from the device
- * (the system time), so make sure it is available.
- */
- if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_TDLS))
- return;
-
- mutex_lock(&mvm->mutex);
- /* Protect the session to hear the TDLS setup response on the channel */
- iwl_mvm_protect_session(mvm, vif, duration, duration, 100, true);
- mutex_unlock(&mvm->mutex);
-
- iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_TDLS);
-}
-
-static const char *
-iwl_mvm_tdls_cs_state_str(enum iwl_mvm_tdls_cs_state state)
-{
- switch (state) {
- case IWL_MVM_TDLS_SW_IDLE:
- return "IDLE";
- case IWL_MVM_TDLS_SW_REQ_SENT:
- return "REQ SENT";
- case IWL_MVM_TDLS_SW_RESP_RCVD:
- return "RESP RECEIVED";
- case IWL_MVM_TDLS_SW_REQ_RCVD:
- return "REQ RECEIVED";
- case IWL_MVM_TDLS_SW_ACTIVE:
- return "ACTIVE";
- }
-
- return NULL;
-}
-
-static void iwl_mvm_tdls_update_cs_state(struct iwl_mvm *mvm,
- enum iwl_mvm_tdls_cs_state state)
-{
- if (mvm->tdls_cs.state == state)
- return;
-
- IWL_DEBUG_TDLS(mvm, "TDLS channel switch state: %s -> %s\n",
- iwl_mvm_tdls_cs_state_str(mvm->tdls_cs.state),
- iwl_mvm_tdls_cs_state_str(state));
- mvm->tdls_cs.state = state;
-
- /* we only send requests to our switching peer - update sent time */
- if (state == IWL_MVM_TDLS_SW_REQ_SENT)
- mvm->tdls_cs.peer.sent_timestamp =
- iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG);
-
- if (state == IWL_MVM_TDLS_SW_IDLE)
- mvm->tdls_cs.cur_sta_id = IWL_MVM_STATION_COUNT;
-}
-
-void iwl_mvm_rx_tdls_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
-{
- struct iwl_rx_packet *pkt = rxb_addr(rxb);
- struct iwl_tdls_channel_switch_notif *notif = (void *)pkt->data;
- struct ieee80211_sta *sta;
- unsigned int delay;
- struct iwl_mvm_sta *mvmsta;
- struct ieee80211_vif *vif;
- u32 sta_id = le32_to_cpu(notif->sta_id);
-
- lockdep_assert_held(&mvm->mutex);
-
- /* can fail sometimes */
- if (!le32_to_cpu(notif->status)) {
- iwl_mvm_tdls_update_cs_state(mvm, IWL_MVM_TDLS_SW_IDLE);
- return;
- }
-
- if (WARN_ON(sta_id >= IWL_MVM_STATION_COUNT))
- return;
-
- sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
- lockdep_is_held(&mvm->mutex));
- /* the station may not be here, but if it is, it must be a TDLS peer */
- if (IS_ERR_OR_NULL(sta) || WARN_ON(!sta->tdls))
- return;
-
- mvmsta = iwl_mvm_sta_from_mac80211(sta);
- vif = mvmsta->vif;
-
- /*
- * Update state and possibly switch again after this is over (DTIM).
- * Also convert TU to msec.
- */
- delay = 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));
-
- iwl_mvm_tdls_update_cs_state(mvm, IWL_MVM_TDLS_SW_ACTIVE);
-}
-
-static int
-iwl_mvm_tdls_check_action(struct iwl_mvm *mvm,
- enum iwl_tdls_channel_switch_type type,
- const u8 *peer, bool peer_initiator, u32 timestamp)
-{
- bool same_peer = false;
- int ret = 0;
-
- /* get the existing peer if it's there */
- if (mvm->tdls_cs.state != IWL_MVM_TDLS_SW_IDLE &&
- mvm->tdls_cs.cur_sta_id != IWL_MVM_STATION_COUNT) {
- struct ieee80211_sta *sta = rcu_dereference_protected(
- mvm->fw_id_to_mac_id[mvm->tdls_cs.cur_sta_id],
- lockdep_is_held(&mvm->mutex));
- if (!IS_ERR_OR_NULL(sta))
- same_peer = ether_addr_equal(peer, sta->addr);
- }
-
- switch (mvm->tdls_cs.state) {
- case IWL_MVM_TDLS_SW_IDLE:
- /*
- * might be spurious packet from the peer after the switch is
- * already done
- */
- if (type == TDLS_MOVE_CH)
- ret = -EINVAL;
- break;
- case IWL_MVM_TDLS_SW_REQ_SENT:
- /* only allow requests from the same peer */
- if (!same_peer)
- ret = -EBUSY;
- else if (type == TDLS_SEND_CHAN_SW_RESP_AND_MOVE_CH &&
- !peer_initiator)
- /*
- * We received a ch-switch request while an outgoing
- * one is pending. Allow it if the peer is the link
- * initiator.
- */
- ret = -EBUSY;
- else if (type == TDLS_SEND_CHAN_SW_REQ)
- /* wait for idle before sending another request */
- ret = -EBUSY;
- else if (timestamp <= mvm->tdls_cs.peer.sent_timestamp)
- /* we got a stale response - ignore it */
- ret = -EINVAL;
- break;
- case IWL_MVM_TDLS_SW_RESP_RCVD:
- /*
- * we are waiting for the FW to give an "active" notification,
- * so ignore requests in the meantime
- */
- ret = -EBUSY;
- break;
- case IWL_MVM_TDLS_SW_REQ_RCVD:
- /* as above, allow the link initiator to proceed */
- if (type == TDLS_SEND_CHAN_SW_REQ) {
- if (!same_peer)
- ret = -EBUSY;
- else if (peer_initiator) /* they are the initiator */
- ret = -EBUSY;
- } else if (type == TDLS_MOVE_CH) {
- ret = -EINVAL;
- }
- break;
- case IWL_MVM_TDLS_SW_ACTIVE:
- /*
- * the only valid request when active is a request to return
- * to the base channel by the current off-channel peer
- */
- if (type != TDLS_MOVE_CH || !same_peer)
- ret = -EBUSY;
- break;
- }
-
- if (ret)
- IWL_DEBUG_TDLS(mvm,
- "Invalid TDLS action %d state %d peer %pM same_peer %d initiator %d\n",
- type, mvm->tdls_cs.state, peer, same_peer,
- peer_initiator);
-
- return ret;
-}
-
-static int
-iwl_mvm_tdls_config_channel_switch(struct iwl_mvm *mvm,
- struct ieee80211_vif *vif,
- enum iwl_tdls_channel_switch_type type,
- const u8 *peer, bool peer_initiator,
- u8 oper_class,
- struct cfg80211_chan_def *chandef,
- u32 timestamp, u16 switch_time,
- u16 switch_timeout, struct sk_buff *skb,
- u32 ch_sw_tm_ie)
-{
- struct ieee80211_sta *sta;
- struct iwl_mvm_sta *mvmsta;
- struct ieee80211_tx_info *info;
- struct ieee80211_hdr *hdr;
- struct iwl_tdls_channel_switch_cmd cmd = {0};
- int ret;
-
- lockdep_assert_held(&mvm->mutex);
-
- ret = iwl_mvm_tdls_check_action(mvm, type, peer, peer_initiator,
- timestamp);
- if (ret)
- return ret;
-
- if (!skb || WARN_ON(skb->len > IWL_TDLS_CH_SW_FRAME_MAX_SIZE)) {
- ret = -EINVAL;
- goto out;
- }
-
- cmd.switch_type = type;
- cmd.timing.frame_timestamp = cpu_to_le32(timestamp);
- cmd.timing.switch_time = cpu_to_le32(switch_time);
- cmd.timing.switch_timeout = cpu_to_le32(switch_timeout);
-
- rcu_read_lock();
- sta = ieee80211_find_sta(vif, peer);
- if (!sta) {
- rcu_read_unlock();
- ret = -ENOENT;
- goto out;
- }
- mvmsta = iwl_mvm_sta_from_mac80211(sta);
- cmd.peer_sta_id = cpu_to_le32(mvmsta->sta_id);
-
- if (!chandef) {
- if (mvm->tdls_cs.state == IWL_MVM_TDLS_SW_REQ_SENT &&
- mvm->tdls_cs.peer.chandef.chan) {
- /* actually moving to the channel */
- chandef = &mvm->tdls_cs.peer.chandef;
- } else if (mvm->tdls_cs.state == IWL_MVM_TDLS_SW_ACTIVE &&
- type == TDLS_MOVE_CH) {
- /* we need to return to base channel */
- struct ieee80211_chanctx_conf *chanctx =
- rcu_dereference(vif->chanctx_conf);
-
- if (WARN_ON_ONCE(!chanctx)) {
- rcu_read_unlock();
- goto out;
- }
-
- chandef = &chanctx->def;
- }
- }
-
- if (chandef) {
- cmd.ci.band = (chandef->chan->band == IEEE80211_BAND_2GHZ ?
- PHY_BAND_24 : PHY_BAND_5);
- cmd.ci.channel = chandef->chan->hw_value;
- cmd.ci.width = iwl_mvm_get_channel_width(chandef);
- cmd.ci.ctrl_pos = iwl_mvm_get_ctrl_pos(chandef);
- }
-
- /* keep quota calculation simple for now - 50% of DTIM for TDLS */
- cmd.timing.max_offchan_duration =
- cpu_to_le32(TU_TO_US(vif->bss_conf.dtim_period *
- vif->bss_conf.beacon_int) / 2);
-
- /* Switch time is the first element in the switch-timing IE. */
- cmd.frame.switch_time_offset = cpu_to_le32(ch_sw_tm_ie + 2);
-
- info = IEEE80211_SKB_CB(skb);
- hdr = (void *)skb->data;
- if (info->control.hw_key) {
- if (info->control.hw_key->cipher != WLAN_CIPHER_SUITE_CCMP) {
- rcu_read_unlock();
- ret = -EINVAL;
- goto out;
- }
- iwl_mvm_set_tx_cmd_ccmp(info, &cmd.frame.tx_cmd);
- }
-
- iwl_mvm_set_tx_cmd(mvm, skb, &cmd.frame.tx_cmd, info,
- mvmsta->sta_id);
-
- iwl_mvm_set_tx_cmd_rate(mvm, &cmd.frame.tx_cmd, info, sta,
- hdr->frame_control);
- rcu_read_unlock();
-
- memcpy(cmd.frame.data, skb->data, skb->len);
-
- ret = iwl_mvm_send_cmd_pdu(mvm, TDLS_CHANNEL_SWITCH_CMD, 0,
- sizeof(cmd), &cmd);
- if (ret) {
- IWL_ERR(mvm, "Failed to send TDLS_CHANNEL_SWITCH cmd: %d\n",
- ret);
- goto out;
- }
-
- /* channel switch has started, update state */
- if (type != TDLS_MOVE_CH) {
- mvm->tdls_cs.cur_sta_id = mvmsta->sta_id;
- iwl_mvm_tdls_update_cs_state(mvm,
- type == TDLS_SEND_CHAN_SW_REQ ?
- IWL_MVM_TDLS_SW_REQ_SENT :
- IWL_MVM_TDLS_SW_REQ_RCVD);
- } else {
- iwl_mvm_tdls_update_cs_state(mvm, IWL_MVM_TDLS_SW_RESP_RCVD);
- }
-
-out:
-
- /* channel switch failed - we are idle */
- if (ret)
- iwl_mvm_tdls_update_cs_state(mvm, IWL_MVM_TDLS_SW_IDLE);
-
- return ret;
-}
-
-void iwl_mvm_tdls_ch_switch_work(struct work_struct *work)
-{
- struct iwl_mvm *mvm;
- struct ieee80211_sta *sta;
- struct iwl_mvm_sta *mvmsta;
- struct ieee80211_vif *vif;
- unsigned int delay;
- int ret;
-
- mvm = container_of(work, struct iwl_mvm, tdls_cs.dwork.work);
- mutex_lock(&mvm->mutex);
-
- /* called after an active channel switch has finished or timed-out */
- iwl_mvm_tdls_update_cs_state(mvm, IWL_MVM_TDLS_SW_IDLE);
-
- /* station might be gone, in that case do nothing */
- if (mvm->tdls_cs.peer.sta_id == IWL_MVM_STATION_COUNT)
- goto out;
-
- sta = rcu_dereference_protected(
- mvm->fw_id_to_mac_id[mvm->tdls_cs.peer.sta_id],
- lockdep_is_held(&mvm->mutex));
- /* the station may not be here, but if it is, it must be a TDLS peer */
- if (!sta || IS_ERR(sta) || WARN_ON(!sta->tdls))
- goto out;
-
- mvmsta = iwl_mvm_sta_from_mac80211(sta);
- vif = mvmsta->vif;
- ret = iwl_mvm_tdls_config_channel_switch(mvm, vif,
- TDLS_SEND_CHAN_SW_REQ,
- sta->addr,
- mvm->tdls_cs.peer.initiator,
- mvm->tdls_cs.peer.op_class,
- &mvm->tdls_cs.peer.chandef,
- 0, 0, 0,
- mvm->tdls_cs.peer.skb,
- mvm->tdls_cs.peer.ch_sw_tm_ie);
- if (ret)
- IWL_ERR(mvm, "Not sending TDLS channel switch: %d\n", ret);
-
- /* retry after a DTIM if we failed sending now */
- delay = TU_TO_MS(vif->bss_conf.dtim_period * vif->bss_conf.beacon_int);
- queue_delayed_work(system_wq, &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_STATION_COUNT) {
- 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_STATION_COUNT) {
- 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_STATION_COUNT;
- 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_STATION_COUNT) {
- 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);
-}
projects / cascardo / linux.git / blobdiff