linux-kernel - Re: [PATCH v3 07/14] remoteproc: Introducting new start and stop functions

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Date:   Tue, 5 May 2020 17:42:17 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:     ohad@...ery.com, loic.pallardy@...com, arnaud.pouliquen@...com,
        s-anna@...com, linux-remoteproc@...r.kernel.org, corbet@....net,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 07/14] remoteproc: Introducting new start and stop
 functions

On Fri 24 Apr 13:01 PDT 2020, Mathieu Poirier wrote:

> Add new functions to replace direct calling of rproc->ops->start() and
> rproc->ops->stop().  That way different behaviour can be played out
> when booting a remote processor or synchronising with it.
> 

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

PS. But I do wonder if we should just inline the struct rproc_ops in
struct rproc, rather than allocate a separate object for it. But after
adding all your accessors changing this would be quite succinct.

Regards,
Bjorn

> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
> ---
>  drivers/remoteproc/remoteproc_core.c     |  6 +++---
>  drivers/remoteproc/remoteproc_internal.h | 16 ++++++++++++++++
>  2 files changed, 19 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index 9de0e2b7ca2b..ef88d3e84bfb 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -1339,7 +1339,7 @@ static int rproc_start(struct rproc *rproc, const struct firmware *fw)
>  	}
>  
>  	/* power up the remote processor */
> -	ret = rproc->ops->start(rproc);
> +	ret = rproc_start_device(rproc);
>  	if (ret) {
>  		dev_err(dev, "can't start rproc %s: %d\n", rproc->name, ret);
>  		goto unprepare_subdevices;
> @@ -1360,7 +1360,7 @@ static int rproc_start(struct rproc *rproc, const struct firmware *fw)
>  	return 0;
>  
>  stop_rproc:
> -	rproc->ops->stop(rproc);
> +	rproc_stop_device(rproc);
>  unprepare_subdevices:
>  	rproc_unprepare_subdevices(rproc);
>  reset_table_ptr:
> @@ -1493,7 +1493,7 @@ static int rproc_stop(struct rproc *rproc, bool crashed)
>  	rproc->table_ptr = rproc->cached_table;
>  
>  	/* power off the remote processor */
> -	ret = rproc->ops->stop(rproc);
> +	ret = rproc_stop_device(rproc);
>  	if (ret) {
>  		dev_err(dev, "can't stop rproc: %d\n", ret);
>  		return ret;
> diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
> index 47b500e40dd9..dda7044c4b3e 100644
> --- a/drivers/remoteproc/remoteproc_internal.h
> +++ b/drivers/remoteproc/remoteproc_internal.h
> @@ -125,6 +125,22 @@ struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc,
>  	return NULL;
>  }
>  
> +static inline int rproc_start_device(struct rproc *rproc)
> +{
> +	if (rproc->ops && rproc->ops->start)
> +		return rproc->ops->start(rproc);
> +
> +	return 0;
> +}
> +
> +static inline int rproc_stop_device(struct rproc *rproc)
> +{
> +	if (rproc->ops && rproc->ops->stop)
> +		return rproc->ops->stop(rproc);
> +
> +	return 0;
> +}
> +
>  static inline
>  bool rproc_u64_fit_in_size_t(u64 val)
>  {
> -- 
> 2.20.1
>