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iwlwifi: mvm: implement mac80211 TDLS channel-switch APIs 

Maintain a TDLS channel-switch state and update it according to
notifications from FW and timeouts. Explicitly check all state
transitions are valid.
When switching is initiated by mac80211, use a delayed work to
periodically reschedule it from iwlwifi.
Give the FW mac80211 generated TDLS channel-switch request/response
templates. It will change appropriate values (switch timings) and Tx
them at appropriate times.

Enable the channel switch wiphy capability bit when the FW supports it.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
hifive-unleashed-5.1
Arik Nemtsov 2014-10-23 18:03:10 +03:00 committed by Emmanuel Grumbach
parent 9c126cd6e0
commit 1d3c3f63f7
6 changed files with 557 additions and 0 deletions
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2
drivers/net/wireless/iwlwifi/mvm/fw.c
View File

@ -466,6 +466,8 @@ int iwl_mvm_up(struct iwl_mvm *mvm)
for (i = 0; i < IWL_MVM_STATION_COUNT; i++)
RCU_INIT_POINTER(mvm->fw_id_to_mac_id[i], NULL);
mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
/* reset quota debouncing buffer - 0xff will yield invalid data */
memset(&mvm->last_quota_cmd, 0xff, sizeof(mvm->last_quota_cmd));

10
drivers/net/wireless/iwlwifi/mvm/mac80211.c
View File

@ -495,6 +495,12 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
}
if (mvm->fw->ucode_capa.capa[0] &
IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH) {
IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
}
ret = ieee80211_register_hw(mvm->hw);
if (ret)
iwl_mvm_leds_exit(mvm);
@ -3211,6 +3217,10 @@ const struct ieee80211_ops iwl_mvm_hw_ops = {
.channel_switch_beacon = iwl_mvm_channel_switch_beacon,
.tdls_channel_switch = iwl_mvm_tdls_channel_switch,
.tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
.tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
#ifdef CONFIG_PM_SLEEP

43
drivers/net/wireless/iwlwifi/mvm/mvm.h
View File

@ -519,6 +519,13 @@ enum {
#define IWL_MVM_DEBUG_SET_TEMPERATURE_MIN -100
#define IWL_MVM_DEBUG_SET_TEMPERATURE_MAX 200
enum iwl_mvm_tdls_cs_state {
IWL_MVM_TDLS_SW_IDLE = 0,
IWL_MVM_TDLS_SW_REQ_SENT,
IWL_MVM_TDLS_SW_REQ_RCVD,
IWL_MVM_TDLS_SW_ACTIVE,
};
struct iwl_mvm {
/* for logger access */
struct device *dev;
@ -740,6 +747,28 @@ struct iwl_mvm {
u32 ap_last_beacon_gp2;
u8 low_latency_agg_frame_limit;
/* TDLS channel switch data */
struct {
struct delayed_work dwork;
enum iwl_mvm_tdls_cs_state state;
/*
* Current cs sta - might be different from periodic cs peer
* station. Value is meaningless when the cs-state is idle.
*/
u8 cur_sta_id;
/* TDLS periodic channel-switch peer */
struct {
u8 sta_id;
u8 op_class;
bool initiator; /* are we the link initiator */
struct cfg80211_chan_def chandef;
struct sk_buff *skb; /* ch sw template */
u32 ch_sw_tm_ie;
} peer;
} tdls_cs;
};
/* Extract MVM priv from op_mode and _hw */
@ -1258,6 +1287,20 @@ void iwl_mvm_recalc_tdls_state(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
bool sta_added);
void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
struct ieee80211_vif *vif);
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);
void iwl_mvm_tdls_recv_channel_switch(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_tdls_ch_sw_params *params);
void iwl_mvm_tdls_cancel_channel_switch(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta);
int iwl_mvm_rx_tdls_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd);
void iwl_mvm_tdls_ch_switch_work(struct work_struct *work);
struct ieee80211_vif *iwl_mvm_get_bss_vif(struct iwl_mvm *mvm);

4
drivers/net/wireless/iwlwifi/mvm/ops.c
View File

@ -258,6 +258,9 @@ static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
true),
};
#undef RX_HANDLER
#define CMD(x) [x] = #x
@ -453,6 +456,7 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
INIT_WORK(&mvm->fw_error_dump_wk, iwl_mvm_fw_error_dump_wk);
INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
spin_lock_init(&mvm->d0i3_tx_lock);
spin_lock_init(&mvm->refs_lock);

9
drivers/net/wireless/iwlwifi/mvm/sta.c
View File

@ -503,6 +503,15 @@ int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
}
/*
* This shouldn't happen - the TDLS channel switch should be canceled
* before the STA is removed.
*/
if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
cancel_delayed_work(&mvm->tdls_cs.dwork);
}
/*
* Make sure that the tx response code sees the station as -EBUSY and
* calls the drain worker.

489
drivers/net/wireless/iwlwifi/mvm/tdls.c
View File

@ -61,9 +61,13 @@
*
*****************************************************************************/
#include <linux/etherdevice.h>
#include "mvm.h"
#include "time-event.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;
@ -215,3 +219,488 @@ void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
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_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;
if (state == IWL_MVM_TDLS_SW_IDLE)
mvm->tdls_cs.cur_sta_id = IWL_MVM_STATION_COUNT;
}
int iwl_mvm_rx_tdls_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
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);
goto out;
}
if (WARN_ON(sta_id >= IWL_MVM_STATION_COUNT))
goto out;
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))
goto out;
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);
out:
return 0;
}
static int
iwl_mvm_tdls_check_action(struct iwl_mvm *mvm,
enum iwl_tdls_channel_switch_type type,
const u8 *peer, bool peer_initiator)
{
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:
/*
* We received a ch-switch request while an outgoing one is
* pending. Allow it to proceed if the other peer is the same
* one we sent to, and we are not the link initiator.
*/
if (type == TDLS_SEND_CHAN_SW_RESP_AND_MOVE_CH) {
if (!same_peer)
ret = -EBUSY;
else if (!peer_initiator) /* we are the initiator */
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:
/* we don't allow initiations during active channel switch */
if (type == TDLS_SEND_CHAN_SW_REQ)
ret = -EINVAL;
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);
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);
if (info->control.hw_key)
iwl_mvm_set_tx_cmd_crypto(mvm, info, &cmd.frame.tx_cmd, skb);
iwl_mvm_set_tx_cmd(mvm, skb, &cmd.frame.tx_cmd, info,
mvmsta->sta_id);
hdr = (void *)skb->data;
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);
}
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;
mutex_lock(&mvm->mutex);
IWL_DEBUG_TDLS(mvm,
"Received TDLS ch switch action %d from %pM status %d\n",
params->action_code, 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);
}