diff mbox series

[V6,2/2] remoteproc: support attach recovery after rproc crash

Message ID 20220701093702.265249-3-peng.fan@oss.nxp.com (mailing list archive)
State Superseded
Headers show
Series remoteproc: support self recovery | expand

Commit Message

Peng Fan (OSS) July 1, 2022, 9:37 a.m. UTC
From: Peng Fan <peng.fan@nxp.com>

Current logic only support main processor to stop/start the remote
processor after rproc crash. However to SoC, such as i.MX8QM/QXP, the
remote processor could do attach recovery after crash and trigger watchdog
reboot. It does not need main processor to load image, or stop/start M4
core.

Introduce two functions: rproc_attach_recovery, rproc_firmware_recovery
for the two cases. Firmware recovery is as before, let main processor to
help recovery, while attach recovery is recover itself withou help.
To attach recovery, we only do detach and attach.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/remoteproc/remoteproc_core.c | 62 +++++++++++++++++++---------
 1 file changed, 43 insertions(+), 19 deletions(-)

Comments

Arnaud POULIQUEN July 4, 2022, 3:06 p.m. UTC | #1
On 7/1/22 11:37, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> Current logic only support main processor to stop/start the remote
> processor after rproc crash. However to SoC, such as i.MX8QM/QXP, the
> remote processor could do attach recovery after crash and trigger watchdog
> reboot. It does not need main processor to load image, or stop/start M4
> core.

I would suppress "M4 core" to be generic.

> 
> Introduce two functions: rproc_attach_recovery, rproc_firmware_recovery

rproc_boot_recovery

> for the two cases. Firmware recovery is as before, let main processor to

s/Firmware/Boot/ 

> help recovery, while attach recovery is recover itself withou help.

without

> To attach recovery, we only do detach and attach.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  drivers/remoteproc/remoteproc_core.c | 62 +++++++++++++++++++---------
>  1 file changed, 43 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index ed374c8bf14a..ef5b9310bc83 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -1884,6 +1884,45 @@ static int __rproc_detach(struct rproc *rproc)
>  	return 0;
>  }
>  
> +static int rproc_attach_recovery(struct rproc *rproc)
> +{
> +	int ret;
> +
> +	ret = __rproc_detach(rproc);
> +	if (ret)
> +		return ret;
> +
> +	return __rproc_attach(rproc);
> +}
> +
> +static int rproc_boot_recovery(struct rproc *rproc)
> +{
> +	const struct firmware *firmware_p;
> +	struct device *dev = &rproc->dev;
> +	int ret;
> +
> +	ret = rproc_stop(rproc, true);
> +	if (ret)
> +		return ret;
> +
> +	/* generate coredump */
> +	rproc->ops->coredump(rproc);
> +
> +	/* load firmware */
> +	ret = request_firmware(&firmware_p, rproc->firmware, dev);
> +	if (ret < 0) {
> +		dev_err(dev, "request_firmware failed: %d\n", ret);
> +		return ret;
> +	}
> +
> +	/* boot the remote processor up again */
> +	ret = rproc_start(rproc, firmware_p);
> +
> +	release_firmware(firmware_p);
> +
> +	return ret;
> +}
> +
>  /**
>   * rproc_trigger_recovery() - recover a remoteproc
>   * @rproc: the remote processor
> @@ -1898,7 +1937,6 @@ static int __rproc_detach(struct rproc *rproc)
>   */
>  int rproc_trigger_recovery(struct rproc *rproc)
>  {
> -	const struct firmware *firmware_p;
>  	struct device *dev = &rproc->dev;
>  	int ret;
>  
> @@ -1912,24 +1950,10 @@ int rproc_trigger_recovery(struct rproc *rproc)
>  
>  	dev_err(dev, "recovering %s\n", rproc->name);
>  
> -	ret = rproc_stop(rproc, true);
> -	if (ret)
> -		goto unlock_mutex;
> -
> -	/* generate coredump */
> -	rproc->ops->coredump(rproc);
> -
> -	/* load firmware */
> -	ret = request_firmware(&firmware_p, rproc->firmware, dev);
> -	if (ret < 0) {
> -		dev_err(dev, "request_firmware failed: %d\n", ret);
> -		goto unlock_mutex;
> -	}
> -
> -	/* boot the remote processor up again */
> -	ret = rproc_start(rproc, firmware_p);
> -
> -	release_firmware(firmware_p);
> +	if (rproc_has_feature(rproc, RPROC_FEAT_ATTACH_ON_RECOVERY))
> +		ret = rproc_attach_recovery(rproc);
> +	else
> +		ret = rproc_boot_recovery(rproc);

I tested the series on stm32mp1 with success.

With typo fixes:
Acked-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>

Thanks,
Arnaud

>  
>  unlock_mutex:
>  	mutex_unlock(&rproc->lock);
diff mbox series

Patch

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index ed374c8bf14a..ef5b9310bc83 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1884,6 +1884,45 @@  static int __rproc_detach(struct rproc *rproc)
 	return 0;
 }
 
+static int rproc_attach_recovery(struct rproc *rproc)
+{
+	int ret;
+
+	ret = __rproc_detach(rproc);
+	if (ret)
+		return ret;
+
+	return __rproc_attach(rproc);
+}
+
+static int rproc_boot_recovery(struct rproc *rproc)
+{
+	const struct firmware *firmware_p;
+	struct device *dev = &rproc->dev;
+	int ret;
+
+	ret = rproc_stop(rproc, true);
+	if (ret)
+		return ret;
+
+	/* generate coredump */
+	rproc->ops->coredump(rproc);
+
+	/* load firmware */
+	ret = request_firmware(&firmware_p, rproc->firmware, dev);
+	if (ret < 0) {
+		dev_err(dev, "request_firmware failed: %d\n", ret);
+		return ret;
+	}
+
+	/* boot the remote processor up again */
+	ret = rproc_start(rproc, firmware_p);
+
+	release_firmware(firmware_p);
+
+	return ret;
+}
+
 /**
  * rproc_trigger_recovery() - recover a remoteproc
  * @rproc: the remote processor
@@ -1898,7 +1937,6 @@  static int __rproc_detach(struct rproc *rproc)
  */
 int rproc_trigger_recovery(struct rproc *rproc)
 {
-	const struct firmware *firmware_p;
 	struct device *dev = &rproc->dev;
 	int ret;
 
@@ -1912,24 +1950,10 @@  int rproc_trigger_recovery(struct rproc *rproc)
 
 	dev_err(dev, "recovering %s\n", rproc->name);
 
-	ret = rproc_stop(rproc, true);
-	if (ret)
-		goto unlock_mutex;
-
-	/* generate coredump */
-	rproc->ops->coredump(rproc);
-
-	/* load firmware */
-	ret = request_firmware(&firmware_p, rproc->firmware, dev);
-	if (ret < 0) {
-		dev_err(dev, "request_firmware failed: %d\n", ret);
-		goto unlock_mutex;
-	}
-
-	/* boot the remote processor up again */
-	ret = rproc_start(rproc, firmware_p);
-
-	release_firmware(firmware_p);
+	if (rproc_has_feature(rproc, RPROC_FEAT_ATTACH_ON_RECOVERY))
+		ret = rproc_attach_recovery(rproc);
+	else
+		ret = rproc_boot_recovery(rproc);
 
 unlock_mutex:
 	mutex_unlock(&rproc->lock);