This patch implements Channel Switch Announcement
for AP mode. This allows for a smooth channel
switch for connected stations that support CSA
when radar is detected.
Signed-off-by: Michal Kazior <michal.kazior@xxxxxxxxx>
---
drivers/net/wireless/ath/ath10k/core.h | 1 +
drivers/net/wireless/ath/ath10k/mac.c | 80 +++++++++++++++++++++++++++++-----
drivers/net/wireless/ath/ath10k/wmi.c | 18 ++++++++
3 files changed, 88 insertions(+), 11 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 035cbf6..2554161 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -414,6 +414,7 @@ struct ath10k {
unsigned int filter_flags;
unsigned long dev_flags;
u32 dfs_block_radar_events;
+ struct ath10k_vif *csa_arvif;
struct wmi_pdev_set_wmm_params_arg wmm_params;
struct completion install_key_done;
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 5b45f3a..5c26766 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -435,8 +435,7 @@ static inline int ath10k_vdev_setup_sync(struct ath10k *ar)
static int ath10k_vdev_start(struct ath10k_vif *arvif)
{
struct ath10k *ar = arvif->ar;
- struct ieee80211_conf *conf = &ar->hw->conf;
- struct ieee80211_channel *channel = conf->chandef.chan;
+ struct cfg80211_chan_def *chandef = &ar->hw->conf.chandef;
struct wmi_vdev_start_request_arg arg = {};
int ret = 0;
@@ -448,16 +447,14 @@ static int ath10k_vdev_start(struct ath10k_vif *arvif)
arg.dtim_period = arvif->dtim_period;
arg.bcn_intval = arvif->beacon_interval;
- arg.channel.freq = channel->center_freq;
-
- arg.channel.band_center_freq1 = conf->chandef.center_freq1;
-
- arg.channel.mode = chan_to_phymode(&conf->chandef);
+ arg.channel.freq = chandef->chan->center_freq;
+ arg.channel.band_center_freq1 = chandef->center_freq1;
+ arg.channel.mode = chan_to_phymode(chandef);
arg.channel.min_power = 0;
- arg.channel.max_power = channel->max_power * 2;
- arg.channel.max_reg_power = channel->max_reg_power * 2;
- arg.channel.max_antenna_gain = channel->max_antenna_gain * 2;
+ arg.channel.max_power = chandef->chan->max_power * 2;
+ arg.channel.max_reg_power = chandef->chan->max_reg_power * 2;
+ arg.channel.max_antenna_gain = chandef->chan->max_antenna_gain * 2;
if (arvif->vdev_type == WMI_VDEV_TYPE_AP) {
arg.ssid = arvif->u.ap.ssid;
@@ -466,7 +463,7 @@ static int ath10k_vdev_start(struct ath10k_vif *arvif)
/* For now allow DFS for AP mode */
arg.channel.chan_radar =
- !!(channel->flags & IEEE80211_CHAN_RADAR);
+ !!(chandef->chan->flags & IEEE80211_CHAN_RADAR);
} else if (arvif->vdev_type == WMI_VDEV_TYPE_IBSS) {
arg.ssid = arvif->vif->bss_conf.ssid;
arg.ssid_len = arvif->vif->bss_conf.ssid_len;
@@ -2136,6 +2133,38 @@ static int ath10k_config_ps(struct ath10k *ar)
return ret;
}
+static void ath10k_mac_update_ap_channel(struct ath10k_vif *arvif)
+{
+ const u8 *bssid = arvif->vif->bss_conf.bssid;
+ int ret;
+
+ ath10k_dbg(ATH10K_DBG_MAC, "mac AP channel update %dMHz\n",
+ arvif->ar->hw->conf.chandef.chan->center_freq);
+
+ ret = ath10k_vdev_stop(arvif);
+ if (ret) {
+ ath10k_warn("could not stop vdev %d (%d)\n",
+ arvif->vdev_id, ret);
+ return;
+ }
+
+ ret = ath10k_vdev_start(arvif);
+ if (ret) {
+ ath10k_warn("could not start vdev %d (%d)\n",
+ arvif->vdev_id, ret);
+ return;
+ }
+
+ ret = ath10k_wmi_vdev_up(arvif->ar, arvif->vdev_id, 0, bssid);
+ if (ret) {
+ ath10k_warn("could not bring vdev up %d (%d)\n",
+ arvif->vdev_id, ret);
+ return;
+ }
+
+ ath10k_dbg(ATH10K_DBG_MAC, "mac AP channel update complete\n");
+}
+
static int ath10k_config(struct ieee80211_hw *hw, u32 changed)
{
struct ath10k *ar = hw->priv;
@@ -2156,6 +2185,9 @@ static int ath10k_config(struct ieee80211_hw *hw, u32 changed)
spin_unlock_bh(&ar->data_lock);
ath10k_config_radar_detection(ar);
+
+ if (ar->csa_arvif && ar->csa_arvif->vif->csa_active)
+ ath10k_mac_update_ap_channel(ar->csa_arvif);
}
if (changed & IEEE80211_CONF_CHANGE_POWER) {
@@ -2495,6 +2527,12 @@ static void ath10k_bss_info_changed(struct ieee80211_hw *hw,
"vdev %d set beacon tx mode to staggered\n",
arvif->vdev_id);
+ if (ar->csa_arvif) {
+ ath10k_dbg(ATH10K_DBG_MAC, "mac CSA completed for vdev_id %d\n",
+ arvif->vdev_id);
+ ar->csa_arvif = NULL;
+ }
+
pdev_param = ar->wmi.pdev_param->beacon_tx_mode;
ret = ath10k_wmi_pdev_set_param(ar, pdev_param,
WMI_BEACON_STAGGERED_MODE);
@@ -3310,6 +3348,24 @@ exit:
return ret;
}
+static void ath10k_channel_switch_beacon(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct cfg80211_chan_def *chandef)
+{
+ struct ath10k *ar = hw->priv;
+ struct ath10k_vif *arvif = ath10k_vif_to_arvif(vif);
+
+ /* FIXME: Multi-VIF not supported */
+
+ if (ar->csa_arvif != NULL) {
+ ath10k_warn("CSA is already active for this device, ignoring!\n");
+ return;
+ }
+
+ ar->csa_arvif = arvif;
+ return;
+}
+
static const struct ieee80211_ops ath10k_ops = {
.tx = ath10k_tx,
.start = ath10k_start,
@@ -3332,6 +3388,7 @@ static const struct ieee80211_ops ath10k_ops = {
.tx_last_beacon = ath10k_tx_last_beacon,
.restart_complete = ath10k_restart_complete,
.get_survey = ath10k_get_survey,
+ .channel_switch_beacon = ath10k_channel_switch_beacon,
#ifdef CONFIG_PM
.suspend = ath10k_suspend,
.resume = ath10k_resume,
@@ -3712,6 +3769,7 @@ int ath10k_mac_register(struct ath10k *ar)
ar->hw->max_listen_interval = ATH10K_MAX_HW_LISTEN_INTERVAL;
ar->hw->wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
+ ar->hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
ar->hw->wiphy->max_remain_on_channel_duration = 5000;
ar->hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index 3ec6c9a..5985197 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -558,6 +558,22 @@ err_pull:
return ret;
}
+static void ath10k_update_csa(struct ath10k_vif *arvif)
+{
+ lockdep_assert_held(&arvif->ar->data_lock);
+
+ if (arvif->ar->csa_arvif != arvif)
+ return;
+
+ if (!arvif->vif->csa_active)
+ return;
+
+ if (!ieee80211_csa_is_complete(arvif->vif))
+ return;
+
+ ieee80211_csa_finish(arvif->vif);
+}
+
static void ath10k_wmi_tx_beacon_nowait(struct ath10k_vif *arvif)
{
struct wmi_bcn_tx_arg arg = {0};
@@ -580,6 +596,8 @@ static void ath10k_wmi_tx_beacon_nowait(struct ath10k_vif *arvif)
dev_kfree_skb_any(arvif->beacon);
arvif->beacon = NULL;
+
+ ath10k_update_csa(arvif);
}
static void ath10k_wmi_tx_beacons_iter(void *data, u8 *mac,
--
1.8.4.rc3
--
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