linux-kernel - Re: [PATCH v7 1/4] remoteproc: core: Add ops to enable custom coredump functionality

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Date:   Wed, 18 Nov 2020 09:38:26 -0600
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Siddharth Gupta <sidgup@...eaurora.org>
Cc:     agross@...nel.org, ohad@...ery.com,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, tsoni@...eaurora.org,
        psodagud@...eaurora.org, rishabhb@...eaurora.org,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH v7 1/4] remoteproc: core: Add ops to enable custom
 coredump functionality

On Tue 03 Nov 03:19 CST 2020, Siddharth Gupta wrote:

> Each remoteproc might have different requirements for coredumps and might
> want to choose the type of dumps it wants to collect. This change allows
> remoteproc drivers to specify their own custom dump function to be executed
> in place of rproc_coredump. If the coredump op is not specified by the
> remoteproc driver it will be set to rproc_coredump by default.
> 

Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Regards,
Bjorn

> Signed-off-by: Siddharth Gupta <sidgup@...eaurora.org>
> ---
>  drivers/remoteproc/remoteproc_core.c | 6 +++++-
>  include/linux/remoteproc.h           | 2 ++
>  2 files changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index dab2c0f..eba7543 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -1704,7 +1704,7 @@ int rproc_trigger_recovery(struct rproc *rproc)
>  		goto unlock_mutex;
>  
>  	/* generate coredump */
> -	rproc_coredump(rproc);
> +	rproc->ops->coredump(rproc);
>  
>  	/* load firmware */
>  	ret = request_firmware(&firmware_p, rproc->firmware, dev);
> @@ -2126,6 +2126,10 @@ static int rproc_alloc_ops(struct rproc *rproc, const struct rproc_ops *ops)
>  	if (!rproc->ops)
>  		return -ENOMEM;
>  
> +	/* Default to rproc_coredump if no coredump function is specified */
> +	if (!rproc->ops->coredump)
> +		rproc->ops->coredump = rproc_coredump;
> +
>  	if (rproc->ops->load)
>  		return 0;
>  
> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> index 3fa3ba6..a419878 100644
> --- a/include/linux/remoteproc.h
> +++ b/include/linux/remoteproc.h
> @@ -375,6 +375,7 @@ enum rsc_handling_status {
>   * @get_boot_addr:	get boot address to entry point specified in firmware
>   * @panic:	optional callback to react to system panic, core will delay
>   *		panic at least the returned number of milliseconds
> + * @coredump:	  collect firmware dump after the subsystem is shutdown
>   */
>  struct rproc_ops {
>  	int (*prepare)(struct rproc *rproc);
> @@ -393,6 +394,7 @@ struct rproc_ops {
>  	int (*sanity_check)(struct rproc *rproc, const struct firmware *fw);
>  	u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
>  	unsigned long (*panic)(struct rproc *rproc);
> +	void (*coredump)(struct rproc *rproc);
>  };
>  
>  /**
> -- 
> Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>