Re: [PATCH v11 4/7] remoteproc: Introduce release_fw optional operation

[Mathieu Poirier <mathieu.poirier@linaro.org>]

On Wed, Oct 09, 2024 at 10:01:05AM +0200, Arnaud Pouliquen wrote:
> This patch updates the rproc_ops struct to include an optional
> release_fw function.
> 
> The release_fw ops is responsible for releasing the remote processor
> firmware image. The ops is called in the following cases:
> 
>  - An error occurs in rproc_start() between the loading of the segments and
>       the start of the remote processor.
>  - after stopping the remote processor.
> 
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
> ---
> Update vs v9 revision:
> - New commit that preplace previous one to introduce ops->release_fw
> ---
>  drivers/remoteproc/remoteproc_core.c | 5 +++++
>  include/linux/remoteproc.h           | 3 +++
>  2 files changed, 8 insertions(+)
> 
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index 7694817f25d4..46863e1ca307 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -1258,6 +1258,9 @@ static int rproc_alloc_registered_carveouts(struct rproc *rproc)
>  
>  static void rproc_release_fw(struct rproc *rproc)
>  {
> +	if (rproc->ops->release_fw)
> +		rproc->ops->release_fw(rproc);
> +
>  	/* Free the copy of the resource table */
>  	kfree(rproc->cached_table);
>  	rproc->cached_table = NULL;
> @@ -1377,6 +1380,8 @@ static int rproc_start(struct rproc *rproc, const struct firmware *fw)
>  unprepare_subdevices:
>  	rproc_unprepare_subdevices(rproc);
>  reset_table_ptr:
> +	if (rproc->ops->release_fw)
> +		rproc->ops->release_fw(rproc);
>  	rproc->table_ptr = rproc->cached_table;
>  
>  	return ret;
> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> index 73f640dd0fc0..bdf4d94a9e63 100644
> --- a/include/linux/remoteproc.h
> +++ b/include/linux/remoteproc.h
> @@ -381,6 +381,8 @@ enum rsc_handling_status {
>   * @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
> + * @release_fw:	optional function to release the firmware image from ROM memories.
> + *              This function is called after stopping the process or in case of an error

... after stopping the process?

>   */
>  struct rproc_ops {
>  	int (*prepare)(struct rproc *rproc);
> @@ -403,6 +405,7 @@ struct rproc_ops {
>  	u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
>  	unsigned long (*panic)(struct rproc *rproc);
>  	void (*coredump)(struct rproc *rproc);
> +	void (*release_fw)(struct rproc *rproc);
>  };
>  
>  /**
> -- 
> 2.25.1
>