[PATCH] firmware: arm_scmi: Clarify Raw per-channel ABI documentation

[PATCH] firmware: arm_scmi: Clarify Raw per-channel ABI documentation

[Cristian Marussi]

Explain more in detail how the per-channel <m> identifier is chosen.

Suggested-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
 Documentation/ABI/testing/debugfs-scmi-raw | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/Documentation/ABI/testing/debugfs-scmi-raw b/Documentation/ABI/testing/debugfs-scmi-raw
index 5468ec08c084..b1c505ed444c 100644
--- a/Documentation/ABI/testing/debugfs-scmi-raw
+++ b/Documentation/ABI/testing/debugfs-scmi-raw
@@ -80,9 +80,13 @@ Description:	SCMI Raw synchronous message injection/snooping facility; write
 		Each write to the entry causes one command request to be built
 		and sent while the replies are read back one message at time
 		(receiving an EOF at each message boundary).
+		Channel identifier <m> matches the SCMI protocol number which
+		has been associated with this transport channel in the DT
+		description, with Base protocol number 0x10 being the default
+		channel for this instance.
 		Note that these per-channel entries rooted at <..>/channels
 		exist only if the transport is configured to have more than
-		one channel.
+		one default channel.
 Users:		Debugging, any userspace test suite
 
 What:		/sys/kernel/debug/scmi/<n>/raw/channels/<m>/message_async
@@ -103,7 +107,11 @@ Description:	SCMI Raw asynchronous message injection/snooping facility; write
 		Each write to the entry causes one command request to be built
 		and sent while the replies are read back one message at time
 		(receiving an EOF at each message boundary).
+		Channel identifier <m> matches the SCMI protocol number which
+		has been associated with this transport channel in the DT
+		description, with Base protocol number 0x10 being the default
+		channel for this instance.
 		Note that these per-channel entries rooted at <..>/channels
 		exist only if the transport is configured to have more than
-		one channel.
+		one default channel.
 Users:		Debugging, any userspace test suite
-- 
2.34.1


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Re: [PATCH] firmware: arm_scmi: Clarify Raw per-channel ABI documentation

[Bagas Sanjaya]

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[Also Cc: linux-doc list]

On Fri, Jan 20, 2023 at 12:23:26PM +0000, Cristian Marussi wrote:
> diff --git a/Documentation/ABI/testing/debugfs-scmi-raw b/Documentation/ABI/testing/debugfs-scmi-raw
> index 5468ec08c084..b1c505ed444c 100644
> --- a/Documentation/ABI/testing/debugfs-scmi-raw
> +++ b/Documentation/ABI/testing/debugfs-scmi-raw
> @@ -80,9 +80,13 @@ Description:	SCMI Raw synchronous message injection/snooping facility; write
>  		Each write to the entry causes one command request to be built
>  		and sent while the replies are read back one message at time
>  		(receiving an EOF at each message boundary).
> +		Channel identifier <m> matches the SCMI protocol number which
> +		has been associated with this transport channel in the DT
> +		description, with Base protocol number 0x10 being the default
> +		channel for this instance.

s/Base/base/

>  		Note that these per-channel entries rooted at <..>/channels
>  		exist only if the transport is configured to have more than
> -		one channel.
> +		one default channel.
>  Users:		Debugging, any userspace test suite
>  
>  What:		/sys/kernel/debug/scmi/<n>/raw/channels/<m>/message_async
> @@ -103,7 +107,11 @@ Description:	SCMI Raw asynchronous message injection/snooping facility; write
>  		Each write to the entry causes one command request to be built
>  		and sent while the replies are read back one message at time
>  		(receiving an EOF at each message boundary).
> +		Channel identifier <m> matches the SCMI protocol number which
> +		has been associated with this transport channel in the DT
> +		description, with Base protocol number 0x10 being the default
> +		channel for this instance.

Same here.

>  		Note that these per-channel entries rooted at <..>/channels
>  		exist only if the transport is configured to have more than
> -		one channel.
> +		one default channel.
>  Users:		Debugging, any userspace test suite
 
Otherwise LGTM.

-- 
An old man doll... just what I always wanted! - Clara

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Re: [PATCH] firmware: arm_scmi: Clarify Raw per-channel ABI documentation

[Cristian Marussi]

On Fri, Jan 20, 2023 at 07:43:30PM +0700, Bagas Sanjaya wrote:
> [Also Cc: linux-doc list]
>

Sorry for missing the Cc but get_maintainer.pl did not say anything
about this ABI docs patches.

> On Fri, Jan 20, 2023 at 12:23:26PM +0000, Cristian Marussi wrote:
> > diff --git a/Documentation/ABI/testing/debugfs-scmi-raw b/Documentation/ABI/testing/debugfs-scmi-raw
> > index 5468ec08c084..b1c505ed444c 100644
> > --- a/Documentation/ABI/testing/debugfs-scmi-raw
> > +++ b/Documentation/ABI/testing/debugfs-scmi-raw
> > @@ -80,9 +80,13 @@ Description:	SCMI Raw synchronous message injection/snooping facility; write
> >  		Each write to the entry causes one command request to be built
> >  		and sent while the replies are read back one message at time
> >  		(receiving an EOF at each message boundary).
> > +		Channel identifier <m> matches the SCMI protocol number which
> > +		has been associated with this transport channel in the DT
> > +		description, with Base protocol number 0x10 being the default
> > +		channel for this instance.
> 
> s/Base/base/
> 
Thought that being an SCMI protocol name definitions would have to be
capitalized.

> >  		Note that these per-channel entries rooted at <..>/channels
> >  		exist only if the transport is configured to have more than
> > -		one channel.
> > +		one default channel.
> >  Users:		Debugging, any userspace test suite
> >  
> >  What:		/sys/kernel/debug/scmi/<n>/raw/channels/<m>/message_async
> > @@ -103,7 +107,11 @@ Description:	SCMI Raw asynchronous message injection/snooping facility; write
> >  		Each write to the entry causes one command request to be built
> >  		and sent while the replies are read back one message at time
> >  		(receiving an EOF at each message boundary).
> > +		Channel identifier <m> matches the SCMI protocol number which
> > +		has been associated with this transport channel in the DT
> > +		description, with Base protocol number 0x10 being the default
> > +		channel for this instance.
> 
> Same here.
> 
> >  		Note that these per-channel entries rooted at <..>/channels
> >  		exist only if the transport is configured to have more than
> > -		one channel.
> > +		one default channel.
> >  Users:		Debugging, any userspace test suite
>  
> Otherwise LGTM.
>
Thanks,
Cristian

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Re: [PATCH] firmware: arm_scmi: Clarify Raw per-channel ABI documentation

[Sudeep Holla]

On Fri, 20 Jan 2023 12:23:26 +0000, Cristian Marussi wrote:
> Explain more in detail how the per-channel <m> identifier is chosen.
> 

Applied to sudeep.holla/linux (for-next/scmi), thanks!

[1/1] firmware: arm_scmi: Clarify Raw per-channel ABI documentation
      https://git.kernel.org/sudeep.holla/c/32a55bbdd74e
--
Regards,
Sudeep


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