diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/tdls.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/tdls.c | 732 |
1 files changed, 0 insertions, 732 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/tdls.c b/drivers/net/wireless/iwlwifi/mvm/tdls.c deleted file mode 100644 index fe2fa5650..000000000 --- a/drivers/net/wireless/iwlwifi/mvm/tdls.c +++ /dev/null @@ -1,732 +0,0 @@ -/****************************************************************************** - * - * 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); -} |