[PATCH 0/2] ath10k: add CSA support

[PATCH 0/2] ath10k: add CSA support

[Michal Kazior]

Hi,

This is a refactored and rewritten AP CSA patch
split into 2. As a bonus this fixes STA CSA as
well.


Michal Kazior (2):
  ath10k: implement channel switching
  ath10k: implement AP CSA

 drivers/net/wireless/ath/ath10k/core.h |  12 ++-
 drivers/net/wireless/ath/ath10k/mac.c  | 182 ++++++++++++++++++++++++++++-----
 drivers/net/wireless/ath/ath10k/wmi.c  |  11 ++
 3 files changed, 175 insertions(+), 30 deletions(-)

-- 
1.8.5.3


_______________________________________________
ath10k mailing list
ath10k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath10k

[PATCH 1/2] ath10k: implement channel switching

[Michal Kazior]

Until now channel change wasn't propagating to FW
directly because operational channel is abstracted
by VDEVs and it wasn't really necessary since
ath10k implements hwscan and hwroc.

This effectively fixes STA CSA and allows for
future AP-like CSA as well.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
---
 drivers/net/wireless/ath/ath10k/core.h |  12 ++-
 drivers/net/wireless/ath/ath10k/mac.c  | 172 ++++++++++++++++++++++++++++-----
 2 files changed, 154 insertions(+), 30 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index ade1781..d39103d 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -226,6 +226,11 @@ struct ath10k_vif {
 	struct ath10k *ar;
 	struct ieee80211_vif *vif;
 
+	bool is_started;
+	bool is_up;
+	u32 aid;
+	u8 bssid[ETH_ALEN];
+
 	struct work_struct wep_key_work;
 	struct ieee80211_key_conf *wep_keys[WMI_MAX_KEY_INDEX + 1];
 	u8 def_wep_key_idx;
@@ -235,7 +240,6 @@ struct ath10k_vif {
 
 	union {
 		struct {
-			u8 bssid[ETH_ALEN];
 			u32 uapsd;
 		} sta;
 		struct {
@@ -249,9 +253,6 @@ struct ath10k_vif {
 			u32 noa_len;
 			u8 *noa_data;
 		} ap;
-		struct {
-			u8 bssid[ETH_ALEN];
-		} ibss;
 	} u;
 
 	u8 fixed_rate;
@@ -412,6 +413,9 @@ struct ath10k {
 	/* valid during scan; needed for mgmt rx during scan */
 	struct ieee80211_channel *scan_channel;
 
+	/* current operating channel definition */
+	struct cfg80211_chan_def chandef;
+
 	int free_vdev_map;
 	int monitor_vdev_id;
 	bool monitor_enabled;
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 776e364..323c886 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -444,8 +444,7 @@ 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->chandef;
 	struct wmi_vdev_start_request_arg arg = {};
 	int ret = 0;
 
@@ -457,16 +456,14 @@ 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;
@@ -475,7 +472,7 @@ 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;
@@ -527,7 +524,8 @@ static int ath10k_vdev_stop(struct ath10k_vif *arvif)
 
 static int ath10k_monitor_start(struct ath10k *ar, int vdev_id)
 {
-	struct ieee80211_channel *channel = ar->hw->conf.chandef.chan;
+	struct cfg80211_chan_def *chandef = &ar->chandef;
+	struct ieee80211_channel *channel = chandef->chan;
 	struct wmi_vdev_start_request_arg arg = {};
 	int ret = 0;
 
@@ -540,11 +538,11 @@ static int ath10k_monitor_start(struct ath10k *ar, int vdev_id)
 
 	arg.vdev_id = vdev_id;
 	arg.channel.freq = channel->center_freq;
-	arg.channel.band_center_freq1 = ar->hw->conf.chandef.center_freq1;
+	arg.channel.band_center_freq1 = chandef->center_freq1;
 
 	/* TODO setup this dynamically, what in case we
 	   don't have any vifs? */
-	arg.channel.mode = chan_to_phymode(&ar->hw->conf.chandef);
+	arg.channel.mode = chan_to_phymode(chandef);
 	arg.channel.chan_radar =
 			!!(channel->flags & IEEE80211_CHAN_RADAR);
 
@@ -791,6 +789,10 @@ static void ath10k_control_beaconing(struct ath10k_vif *arvif,
 
 	if (!info->enable_beacon) {
 		ath10k_vdev_stop(arvif);
+
+		arvif->is_started = false;
+		arvif->is_up = false;
+
 		return;
 	}
 
@@ -800,12 +802,21 @@ static void ath10k_control_beaconing(struct ath10k_vif *arvif,
 	if (ret)
 		return;
 
-	ret = ath10k_wmi_vdev_up(arvif->ar, arvif->vdev_id, 0, info->bssid);
+	arvif->aid = 0;
+	memcpy(arvif->bssid, info->bssid, ETH_ALEN);
+
+	ret = ath10k_wmi_vdev_up(arvif->ar, arvif->vdev_id, arvif->aid,
+				 arvif->bssid);
 	if (ret) {
 		ath10k_warn("Failed to bring up VDEV: %d\n",
 			    arvif->vdev_id);
+		ath10k_vdev_stop(arvif);
 		return;
 	}
+
+	arvif->is_started = true;
+	arvif->is_up = true;
+
 	ath10k_dbg(ATH10K_DBG_MAC, "mac vdev %d up\n", arvif->vdev_id);
 }
 
@@ -824,18 +835,18 @@ static void ath10k_control_ibss(struct ath10k_vif *arvif,
 			ath10k_warn("Failed to delete IBSS self peer:%pM for VDEV:%d ret:%d\n",
 				    self_peer, arvif->vdev_id, ret);
 
-		if (is_zero_ether_addr(arvif->u.ibss.bssid))
+		if (is_zero_ether_addr(arvif->bssid))
 			return;
 
 		ret = ath10k_peer_delete(arvif->ar, arvif->vdev_id,
-					 arvif->u.ibss.bssid);
+					 arvif->bssid);
 		if (ret) {
 			ath10k_warn("Failed to delete IBSS BSSID peer:%pM for VDEV:%d ret:%d\n",
-				    arvif->u.ibss.bssid, arvif->vdev_id, ret);
+				    arvif->bssid, arvif->vdev_id, ret);
 			return;
 		}
 
-		memset(arvif->u.ibss.bssid, 0, ETH_ALEN);
+		memset(arvif->bssid, 0, ETH_ALEN);
 
 		return;
 	}
@@ -1338,11 +1349,17 @@ static void ath10k_bss_assoc(struct ieee80211_hw *hw,
 		   "mac vdev %d up (associated) bssid %pM aid %d\n",
 		   arvif->vdev_id, bss_conf->bssid, bss_conf->aid);
 
-	ret = ath10k_wmi_vdev_up(ar, arvif->vdev_id, bss_conf->aid,
-				 bss_conf->bssid);
-	if (ret)
+	arvif->aid = bss_conf->aid;
+	memcpy(arvif->bssid, bss_conf->bssid, ETH_ALEN);
+
+	ret = ath10k_wmi_vdev_up(ar, arvif->vdev_id, arvif->aid, arvif->bssid);
+	if (ret) {
 		ath10k_warn("VDEV: %d up failed: ret %d\n",
 			    arvif->vdev_id, ret);
+		return;
+	}
+
+	arvif->is_up = true;
 }
 
 /*
@@ -1382,6 +1399,9 @@ static void ath10k_bss_disassoc(struct ieee80211_hw *hw,
 	ret = ath10k_wmi_vdev_down(ar, arvif->vdev_id);
 
 	arvif->def_wep_key_idx = 0;
+
+	arvif->is_started = false;
+	arvif->is_up = false;
 }
 
 static int ath10k_station_assoc(struct ath10k *ar, struct ath10k_vif *arvif,
@@ -2145,6 +2165,98 @@ static int ath10k_config_ps(struct ath10k *ar)
 	return ret;
 }
 
+static const char *chandef_get_width(enum nl80211_chan_width width)
+{
+	switch (width) {
+	case NL80211_CHAN_WIDTH_20_NOHT:
+		return "20 (noht)";
+	case NL80211_CHAN_WIDTH_20:
+		return "20";
+	case NL80211_CHAN_WIDTH_40:
+		return "40";
+	case NL80211_CHAN_WIDTH_80:
+		return "80";
+	case NL80211_CHAN_WIDTH_80P80:
+		return "80+80";
+	case NL80211_CHAN_WIDTH_160:
+		return "160";
+	case NL80211_CHAN_WIDTH_5:
+		return "5";
+	case NL80211_CHAN_WIDTH_10:
+		return "10";
+	}
+	return "?";
+}
+
+static void ath10k_config_chan(struct ath10k *ar)
+{
+	struct ath10k_vif *arvif;
+	bool monitor_was_enabled;
+	int ret;
+
+	lockdep_assert_held(&ar->conf_mutex);
+
+	ath10k_dbg(ATH10K_DBG_MAC,
+		   "mac config channel to %dMHz (cf1 %dMHz cf2 %dMHz width %s)\n",
+		   ar->chandef.chan->center_freq,
+		   ar->chandef.center_freq1,
+		   ar->chandef.center_freq2,
+		   chandef_get_width(ar->chandef.width));
+
+	/* First stop monitor interface. Some FW versions crash if there's a
+	 * lone monitor interface. */
+	monitor_was_enabled = ar->monitor_enabled;
+
+	if (ar->monitor_enabled)
+		ath10k_monitor_stop(ar);
+
+	list_for_each_entry(arvif, &ar->arvifs, list) {
+		if (!arvif->is_started)
+			continue;
+
+		if (arvif->vdev_type == WMI_VDEV_TYPE_MONITOR)
+			continue;
+
+		ret = ath10k_vdev_stop(arvif);
+		if (ret) {
+			ath10k_warn("could not stop vdev %d (%d)\n",
+				    arvif->vdev_id, ret);
+			continue;
+		}
+	}
+
+	/* all vdevs are now stopped - now attempt to restart them */
+
+	list_for_each_entry(arvif, &ar->arvifs, list) {
+		if (!arvif->is_started)
+			continue;
+
+		if (arvif->vdev_type == WMI_VDEV_TYPE_MONITOR)
+			continue;
+
+		ret = ath10k_vdev_start(arvif);
+		if (ret) {
+			ath10k_warn("could not start vdev %d (%d)\n",
+				    arvif->vdev_id, ret);
+			continue;
+		}
+
+		if (!arvif->is_up)
+			continue;
+
+		ret = ath10k_wmi_vdev_up(arvif->ar, arvif->vdev_id, arvif->aid,
+					 arvif->bssid);
+		if (ret) {
+			ath10k_warn("could not bring vdev up %d (%d)\n",
+				    arvif->vdev_id, ret);
+			continue;
+		}
+	}
+
+	if (monitor_was_enabled)
+		ath10k_monitor_start(ar, ar->monitor_vdev_id);
+}
+
 static int ath10k_config(struct ieee80211_hw *hw, u32 changed)
 {
 	struct ath10k *ar = hw->priv;
@@ -2165,6 +2277,11 @@ static int ath10k_config(struct ieee80211_hw *hw, u32 changed)
 		spin_unlock_bh(&ar->data_lock);
 
 		ath10k_config_radar_detection(ar);
+
+		if (!cfg80211_chandef_identical(&ar->chandef, &conf->chandef)) {
+			ar->chandef = conf->chandef;
+			ath10k_config_chan(ar);
+		}
 	}
 
 	if (changed & IEEE80211_CONF_CHANGE_POWER) {
@@ -2559,15 +2676,18 @@ static void ath10k_bss_info_changed(struct ieee80211_hw *hw,
 				 * this is never erased as we it for crypto key
 				 * clearing; this is FW requirement
 				 */
-				memcpy(arvif->u.sta.bssid, info->bssid,
-				       ETH_ALEN);
+				memcpy(arvif->bssid, info->bssid, ETH_ALEN);
 
 				ath10k_dbg(ATH10K_DBG_MAC,
 					   "mac vdev %d start %pM\n",
 					   arvif->vdev_id, info->bssid);
 
-				/* FIXME: check return value */
 				ret = ath10k_vdev_start(arvif);
+				if (ret)
+					ath10k_warn("failed to start vdev: %d\n",
+						    ret);
+				else
+					arvif->is_started = true;
 			}
 
 			/*
@@ -2576,7 +2696,7 @@ static void ath10k_bss_info_changed(struct ieee80211_hw *hw,
 			 * IBSS in order to remove BSSID peer.
 			 */
 			if (vif->type == NL80211_IFTYPE_ADHOC)
-				memcpy(arvif->u.ibss.bssid, info->bssid,
+				memcpy(arvif->bssid, info->bssid,
 				       ETH_ALEN);
 		}
 	}
-- 
1.8.5.3


_______________________________________________
ath10k mailing list
ath10k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath10k

Re: [PATCH 1/2] ath10k: implement channel switching

[Kalle Valo]

Michal Kazior <michal.kazior@tieto.com> writes:

> Until now channel change wasn't propagating to FW
> directly because operational channel is abstracted
> by VDEVs and it wasn't really necessary since
> ath10k implements hwscan and hwroc.
>
> This effectively fixes STA CSA and allows for
> future AP-like CSA as well.
>
> Signed-off-by: Michal Kazior <michal.kazior@tieto.com>

[...]

> @@ -2559,15 +2676,18 @@ static void ath10k_bss_info_changed(struct ieee80211_hw *hw,
>  				 * this is never erased as we it for crypto key
>  				 * clearing; this is FW requirement
>  				 */
> -				memcpy(arvif->u.sta.bssid, info->bssid,
> -				       ETH_ALEN);
> +				memcpy(arvif->bssid, info->bssid, ETH_ALEN);
>  
>  				ath10k_dbg(ATH10K_DBG_MAC,
>  					   "mac vdev %d start %pM\n",
>  					   arvif->vdev_id, info->bssid);
>  
> -				/* FIXME: check return value */
>  				ret = ath10k_vdev_start(arvif);
> +				if (ret)
> +					ath10k_warn("failed to start vdev: %d\n",
> +						    ret);
> +				else
> +					arvif->is_started = true;
>  			}

I really don't like that if-else construct and I think it's just better
to bail out if an error happens, so I changed this to:

				ret = ath10k_vdev_start(arvif);
				if (ret) {
					ath10k_warn("failed to start vdev: %d\n",
						    ret);
					return;
				}

				arvif->is_started = true;

-- 
Kalle Valo

_______________________________________________
ath10k mailing list
ath10k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath10k

[PATCH 2/2] ath10k: implement AP CSA

[Michal Kazior]

Most channel switching logic has been implemented
already so this patch is pretty small. The patch
makes use of mac80211's vif->csa_active for AP CSA
handling.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
---
 drivers/net/wireless/ath/ath10k/mac.c | 10 ++++++++++
 drivers/net/wireless/ath/ath10k/wmi.c | 11 +++++++++++
 2 files changed, 21 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 323c886..ebaa8ad 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -3760,6 +3760,14 @@ static int ath10k_set_bitrate_mask(struct ieee80211_hw *hw,
 	return ath10k_set_fixed_rate_param(arvif, fixed_rate, fixed_nss);
 }
 
+static void ath10k_channel_switch_beacon(struct ieee80211_hw *hw,
+					 struct ieee80211_vif *vif,
+					 struct cfg80211_chan_def *chandef)
+{
+	/* there's no need to do anything here. vif->csa_active is enough */
+	return;
+}
+
 static const struct ieee80211_ops ath10k_ops = {
 	.tx				= ath10k_tx,
 	.start				= ath10k_start,
@@ -3783,6 +3791,7 @@ static const struct ieee80211_ops ath10k_ops = {
 	.restart_complete		= ath10k_restart_complete,
 	.get_survey			= ath10k_get_survey,
 	.set_bitrate_mask		= ath10k_set_bitrate_mask,
+	.channel_switch_beacon		= ath10k_channel_switch_beacon,
 #ifdef CONFIG_PM
 	.suspend			= ath10k_suspend,
 	.resume				= ath10k_resume,
@@ -4162,6 +4171,7 @@ 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 712a606..67e91a4 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -1385,6 +1385,17 @@ static void ath10k_wmi_event_host_swba(struct ath10k *ar, struct sk_buff *skb)
 			continue;
 		}
 
+		/* There are no completions for beacons so wait for next SWBA
+		 * before telling mac80211 to decrement CSA counter
+		 *
+		 * Once CSA counter is completed stop sending beacons until
+		 * actual channel switch is done */
+		if (arvif->vif->csa_active &&
+		    ieee80211_csa_is_complete(arvif->vif)) {
+			ieee80211_csa_finish(arvif->vif);
+			continue;
+		}
+
 		bcn = ieee80211_beacon_get(ar->hw, arvif->vif);
 		if (!bcn) {
 			ath10k_warn("could not get mac80211 beacon\n");
-- 
1.8.5.3


_______________________________________________
ath10k mailing list
ath10k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath10k

Re: [PATCH 0/2] ath10k: add CSA support

[Kalle Valo]

Michal Kazior <michal.kazior@tieto.com> writes:

> This is a refactored and rewritten AP CSA patch
> split into 2. As a bonus this fixes STA CSA as
> well.
>
>
> Michal Kazior (2):
>   ath10k: implement channel switching
>   ath10k: implement AP CSA

Oddly enough only the cover letter was delivered to ath10k list, no idea
what happened to the patches. But I can get the patches from
linux-wireless lists.

But do these patches depend to any mac80211 or cfg80211 patches. Or is
it safe to take these to my ath-next branch?

-- 
Kalle Valo

_______________________________________________
ath10k mailing list
ath10k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath10k

Re: [PATCH 0/2] ath10k: add CSA support

[Michal Kazior]

On 23 January 2014 12:59, Kalle Valo <kvalo@qca.qualcomm.com> wrote:
> Michal Kazior <michal.kazior@tieto.com> writes:
>
>> This is a refactored and rewritten AP CSA patch
>> split into 2. As a bonus this fixes STA CSA as
>> well.
>>
>>
>> Michal Kazior (2):
>>   ath10k: implement channel switching
>>   ath10k: implement AP CSA
>
> Oddly enough only the cover letter was delivered to ath10k list, no idea
> what happened to the patches. But I can get the patches from
> linux-wireless lists.
>
> But do these patches depend to any mac80211 or cfg80211 patches. Or is
> it safe to take these to my ath-next branch?

It's safe take them. They don't have any strange dependencies.


Michał

_______________________________________________
ath10k mailing list
ath10k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath10k

Re: [PATCH 0/2] ath10k: add CSA support

[Kalle Valo]

Michal Kazior <michal.kazior@tieto.com> writes:

> This is a refactored and rewritten AP CSA patch
> split into 2. As a bonus this fixes STA CSA as
> well.
>
>
> Michal Kazior (2):
>   ath10k: implement channel switching
>   ath10k: implement AP CSA

Thanks, both patches applied.

-- 
Kalle Valo

_______________________________________________
ath10k mailing list
ath10k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath10k