RE: [PATCH V4 2/2] firmware: arm_scmi: add smc/hvc transport

[Peng Fan]

> Subject: Re: [PATCH V4 2/2] firmware: arm_scmi: add smc/hvc transport
> 
> On 3/5/20 8:06 AM, Sudeep Holla wrote:
> > On Thu, Mar 05, 2020 at 11:25:35AM +0000, Peng Fan wrote:
> >
> > [...]
> >
> >>>
> >>> Yes, this may fix the issue. However I would like to know if we need
> >>> to support multiple channels/shared memory simultaneously. It is
> >>> fair requirement and may need some work which should be fine.
> >>
> >> Do you have any suggestions? Currently I have not worked out an good
> >> solution.
> >>
> >
> > TBH, I haven't given it a much thought. I would like to know if people
> > are happy with just one SMC channel for SCMI or do they need more ?
> > If they need it, we can try to solve it. Otherwise, what you have will
> > suffice IMO.
> 
> On our platforms we have one channel/shared memory area/mailbox
> instance for all standard SCMI protocols, and we have a separate
> channel/shared memory area/mailbox driver instance for a proprietary one.
> They happen to have difference throughput requirements, hence the split.
> 
> If I read Peng's submission correctly, it seems to me that the usage model
> described before is still fine.

Thanks. 

Sudeep,

Then should I repost with the global mutex added?

Thanks,
Peng.


> --
> Florian