linux-kernel - Re: [PATCH v5 2/2] misc: fastrpc: use coherent pool for untranslated Compute Banks

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Message-ID: <jorlpqmhntzavj5lffxddmuhjdjlis5ccbuunao7p5pzwcqd2j@eetql7bl2suj>
Date: Tue, 11 Jun 2024 22:57:07 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Dylan Van Assche <me@...anvanassche.be>
Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>, 
	Amol Maheshwari <amahesh@....qualcomm.com>, Arnd Bergmann <arnd@...db.de>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Caleb Connolly <caleb.connolly@...aro.org>, phone-devel@...r.kernel.org, 
	~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH v5 2/2] misc: fastrpc: use coherent pool for untranslated
 Compute Banks

On Fri, May 24, 2024 at 06:14:03PM +0200, Dylan Van Assche wrote:
> Use fastrpc_remote_heap_alloc to allocate from the FastRPC device
> instead of the Compute Bank when the session ID is 0. This ensures
> that the allocation is inside the coherent DMA pool which is already
> accessible to the DSP. This is necessary to support FastRPC devices
> which do not have dedicated Compute Banks such as the SLPI on the SDM845.
> The latter uses an allocated CMA region instead of FastRPC Compute Banks.
> 
> Signed-off-by: Dylan Van Assche <me@...anvanassche.be>
> Reviewed-by: Caleb Connolly <caleb.connolly@...aro.org>
> ---
>  drivers/misc/fastrpc.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>


-- 
With best wishes
Dmitry