All of lore.kernel.org
 help / color / mirror / Atom feed
* [PATCH] wcn36xx: handle connection loss indication
@ 2021-09-01  3:05 Benjamin Li
  2021-09-01  6:41 ` Loic Poulain
       [not found] ` <CAMZdPi_frOfwf+9nfiUw2NJhfuSVgcPj3=Hx2g0d8UsaZza5MA@mail.gmail.com>
  0 siblings, 2 replies; 4+ messages in thread
From: Benjamin Li @ 2021-09-01  3:05 UTC (permalink / raw)
  To: Kalle Valo
  Cc: Bryan O'Donoghue, Loic Poulain, Benjamin Li, stable,
	David S. Miller, Jakub Kicinski, wcn36xx, linux-wireless, netdev,
	linux-kernel

Firmware sends delete_sta_context_ind when it detects the AP has gone
away in STA mode. Right now the handler for that indication only handles
AP mode; fix it to also handle STA mode.

Cc: stable@vger.kernel.org
Fixes: 8def9ec46a5f ("wcn36xx: Enable firmware link monitoring")
Signed-off-by: Benjamin Li <benl@squareup.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 drivers/net/wireless/ath/wcn36xx/smd.c | 44 +++++++++++++++++++-------
 1 file changed, 33 insertions(+), 11 deletions(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index 57fa857b290b..f6bea896abe8 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -2623,30 +2623,52 @@ static int wcn36xx_smd_delete_sta_context_ind(struct wcn36xx *wcn,
 					      size_t len)
 {
 	struct wcn36xx_hal_delete_sta_context_ind_msg *rsp = buf;
-	struct wcn36xx_vif *tmp;
+	struct wcn36xx_vif *vif_priv;
+	struct ieee80211_vif *vif;
+	struct ieee80211_bss_conf *bss_conf;
 	struct ieee80211_sta *sta;
+	bool found = false;
 
 	if (len != sizeof(*rsp)) {
 		wcn36xx_warn("Corrupted delete sta indication\n");
 		return -EIO;
 	}
 
-	wcn36xx_dbg(WCN36XX_DBG_HAL, "delete station indication %pM index %d\n",
-		    rsp->addr2, rsp->sta_id);
+	wcn36xx_dbg(WCN36XX_DBG_HAL,
+		    "delete station indication %pM index %d reason %d\n",
+		    rsp->addr2, rsp->sta_id, rsp->reason_code);
 
-	list_for_each_entry(tmp, &wcn->vif_list, list) {
+	list_for_each_entry(vif_priv, &wcn->vif_list, list) {
 		rcu_read_lock();
-		sta = ieee80211_find_sta(wcn36xx_priv_to_vif(tmp), rsp->addr2);
-		if (sta)
-			ieee80211_report_low_ack(sta, 0);
+		vif = wcn36xx_priv_to_vif(vif_priv);
+
+		if (vif->type == NL80211_IFTYPE_STATION) {
+			/* We could call ieee80211_find_sta too, but checking
+			 * bss_conf is clearer.
+			 */
+			bss_conf = &vif->bss_conf;
+			if (vif_priv->sta_assoc &&
+			    !memcmp(bss_conf->bssid, rsp->addr2, ETH_ALEN)) {
+				found = true;
+				wcn36xx_dbg(WCN36XX_DBG_HAL,
+					    "connection loss bss_index %d\n",
+					    vif_priv->bss_index);
+				ieee80211_connection_loss(vif);
+			}
+		} else {
+			sta = ieee80211_find_sta(vif, rsp->addr2);
+			if (sta) {
+				found = true;
+				ieee80211_report_low_ack(sta, 0);
+			}
+		}
+
 		rcu_read_unlock();
-		if (sta)
+		if (found)
 			return 0;
 	}
 
-	wcn36xx_warn("STA with addr %pM and index %d not found\n",
-		     rsp->addr2,
-		     rsp->sta_id);
+	wcn36xx_warn("BSS or STA with addr %pM not found\n", rsp->addr2);
 	return -ENOENT;
 }
 
-- 
2.17.1


^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH] wcn36xx: handle connection loss indication
  2021-09-01  3:05 [PATCH] wcn36xx: handle connection loss indication Benjamin Li
@ 2021-09-01  6:41 ` Loic Poulain
       [not found] ` <CAMZdPi_frOfwf+9nfiUw2NJhfuSVgcPj3=Hx2g0d8UsaZza5MA@mail.gmail.com>
  1 sibling, 0 replies; 4+ messages in thread
From: Loic Poulain @ 2021-09-01  6:41 UTC (permalink / raw)
  To: Benjamin Li
  Cc: Kalle Valo, Bryan O'Donoghue, stable, David S. Miller,
	Jakub Kicinski, wcn36xx, linux-wireless, Network Development,
	open list

Hi Benjamin,

On Wed, 1 Sept 2021 at 05:05, Benjamin Li <benl@squareup.com> wrote:
>
> Firmware sends delete_sta_context_ind when it detects the AP has gone
> away in STA mode. Right now the handler for that indication only handles
> AP mode; fix it to also handle STA mode.
>
> Cc: stable@vger.kernel.org
> Fixes: 8def9ec46a5f ("wcn36xx: Enable firmware link monitoring")

I think it's good to have but does it really fix the link monitoring issue?
Is the connection loss detected in this scenario:
- Connect to AP
- Force active mode (iw wlan0 set power_save off)
- Wait for no data activity
- HW shutdown the AP (AP leave)

Do you get any indication?

In this scenario, DB410C (wcn3620) does not report anything.

Regards,
Loic

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH] wcn36xx: handle connection loss indication
       [not found] ` <CAMZdPi_frOfwf+9nfiUw2NJhfuSVgcPj3=Hx2g0d8UsaZza5MA@mail.gmail.com>
@ 2021-09-01 11:56   ` Bryan O'Donoghue
  2021-09-01 18:02     ` Benjamin Li
  0 siblings, 1 reply; 4+ messages in thread
From: Bryan O'Donoghue @ 2021-09-01 11:56 UTC (permalink / raw)
  To: Loic Poulain, Benjamin Li
  Cc: Kalle Valo, stable, David S. Miller, Jakub Kicinski, wcn36xx,
	linux-wireless, Network Development, open list

On 01/09/2021 07:40, Loic Poulain wrote:
> iw wlan0 set power_save off

I do this on wcn3680b and get no loss of signal

If I do this though

diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c 
b/drivers/net/wireless/ath/wcn36xx/smd.c
index 03966072f34c..ba613fbb728d 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -2345,6 +2345,8 @@ int wcn36xx_smd_feature_caps_exchange(struct 
wcn36xx *wcn)
                 set_feat_caps(msg_body.feat_caps, DOT11AC);
                 set_feat_caps(msg_body.feat_caps, 
ANTENNA_DIVERSITY_SELECTION);
         }
+       set_feat_caps(msg_body.feat_caps, IBSS_HEARTBEAT_OFFLOAD);
+       set_feat_caps(msg_body.feat_caps, WLANACTIVE_OFFLOAD);

         PREPARE_HAL_BUF(wcn->hal_buf, msg_body);

@@ -2589,7 +2591,7 @@ static int wcn36xx_smd_missed_beacon_ind(struct 
wcn36xx *wcn,
         struct wcn36xx_hal_missed_beacon_ind_msg *rsp = buf;
         struct ieee80211_vif *vif = NULL;
         struct wcn36xx_vif *tmp;
-
+wcn36xx_info("%s/%d\n", __func__, __LINE__);
         /* Old FW does not have bss index */
         if (wcn36xx_is_fw_version(wcn, 1, 2, 2, 24)) {
                 list_for_each_entry(tmp, &wcn->vif_list, list) {
@@ -2608,7 +2610,7 @@ static int wcn36xx_smd_missed_beacon_ind(struct 
wcn36xx *wcn,

         list_for_each_entry(tmp, &wcn->vif_list, list) {
                 if (tmp->bss_index == rsp->bss_index) {
-                       wcn36xx_dbg(WCN36XX_DBG_HAL, "beacon missed 
bss_index %d\n",
+                       wcn36xx_info("beacon missed bss_index %d\n",
                                     rsp->bss_index);
                         vif = wcn36xx_priv_to_vif(tmp);
                         ieee80211_connection_loss(vif);


bingo

root@linaro-developer:~# iw wlan0 set power_save off 
 


# pulls plug on AP

root@linaro-developer:~# [   83.290987] wcn36xx: 
wcn36xx_smd_missed_beacon_ind/2594
[   83.291070] wcn36xx: beacon missed bss_index 0
[   83.295403] wlan0: Connection to AP e2:63:da:9c:a4:bd lost

I'm not sure if both flags are required but, this is the behavior we want


^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH] wcn36xx: handle connection loss indication
  2021-09-01 11:56   ` Bryan O'Donoghue
@ 2021-09-01 18:02     ` Benjamin Li
  0 siblings, 0 replies; 4+ messages in thread
From: Benjamin Li @ 2021-09-01 18:02 UTC (permalink / raw)
  To: Bryan O'Donoghue, Loic Poulain
  Cc: Kalle Valo, stable, David S. Miller, Jakub Kicinski, wcn36xx,
	linux-wireless, Network Development, open list

Thanks for the investigation!

As discussed offline, I will send v2 with Fixes: removed, and Bryan will test and submit a separate patch to add the additional feat_caps for the power_save off case.

Depending on DB410c testing, these feat_caps may need to be gated for WCN3680 only, in which case Loic's patch to re-enable CONNECTION_MONITOR (but gated for WCN3660/3620) would still be needed.

Ben

On 9/1/21 4:56 AM, Bryan O'Donoghue wrote:
> On 01/09/2021 07:40, Loic Poulain wrote:
>> iw wlan0 set power_save off
> 
> I do this on wcn3680b and get no loss of signal
> 
> If I do this though
> 
> diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
> index 03966072f34c..ba613fbb728d 100644
> --- a/drivers/net/wireless/ath/wcn36xx/smd.c
> +++ b/drivers/net/wireless/ath/wcn36xx/smd.c
> @@ -2345,6 +2345,8 @@ int wcn36xx_smd_feature_caps_exchange(struct wcn36xx *wcn)
>                 set_feat_caps(msg_body.feat_caps, DOT11AC);
>                 set_feat_caps(msg_body.feat_caps, ANTENNA_DIVERSITY_SELECTION);
>         }
> +       set_feat_caps(msg_body.feat_caps, IBSS_HEARTBEAT_OFFLOAD);
> +       set_feat_caps(msg_body.feat_caps, WLANACTIVE_OFFLOAD);
> 
>         PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
> 
> @@ -2589,7 +2591,7 @@ static int wcn36xx_smd_missed_beacon_ind(struct wcn36xx *wcn,
>         struct wcn36xx_hal_missed_beacon_ind_msg *rsp = buf;
>         struct ieee80211_vif *vif = NULL;
>         struct wcn36xx_vif *tmp;
> -
> +wcn36xx_info("%s/%d\n", __func__, __LINE__);
>         /* Old FW does not have bss index */
>         if (wcn36xx_is_fw_version(wcn, 1, 2, 2, 24)) {
>                 list_for_each_entry(tmp, &wcn->vif_list, list) {
> @@ -2608,7 +2610,7 @@ static int wcn36xx_smd_missed_beacon_ind(struct wcn36xx *wcn,
> 
>         list_for_each_entry(tmp, &wcn->vif_list, list) {
>                 if (tmp->bss_index == rsp->bss_index) {
> -                       wcn36xx_dbg(WCN36XX_DBG_HAL, "beacon missed bss_index %d\n",
> +                       wcn36xx_info("beacon missed bss_index %d\n",
>                                     rsp->bss_index);
>                         vif = wcn36xx_priv_to_vif(tmp);
>                         ieee80211_connection_loss(vif);
> 
> 
> bingo
> 
> root@linaro-developer:~# iw wlan0 set power_save off
> 
> 
> # pulls plug on AP
> 
> root@linaro-developer:~# [   83.290987] wcn36xx: wcn36xx_smd_missed_beacon_ind/2594
> [   83.291070] wcn36xx: beacon missed bss_index 0
> [   83.295403] wlan0: Connection to AP e2:63:da:9c:a4:bd lost
> 
> I'm not sure if both flags are required but, this is the behavior we want
> 

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2021-09-01 18:02 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-09-01  3:05 [PATCH] wcn36xx: handle connection loss indication Benjamin Li
2021-09-01  6:41 ` Loic Poulain
     [not found] ` <CAMZdPi_frOfwf+9nfiUw2NJhfuSVgcPj3=Hx2g0d8UsaZza5MA@mail.gmail.com>
2021-09-01 11:56   ` Bryan O'Donoghue
2021-09-01 18:02     ` Benjamin Li

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.