linux-kernel - Re: [PATCH v2 4/7] ARM: davinci: Add support for an L3RAM gen

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Date:	Mon, 1 Oct 2012 17:34:02 +0530
From:	Sekhar Nori <nsekhar@...com>
To:	Matt Porter <mporter@...com>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Hans J. Koch" <hjk@...sjkoch.de>,
	Benoit Cousson <b-cousson@...com>,
	Paul Walmsley <paul@...an.com>,
	Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>,
	Linux OMAP List <linux-omap@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux DaVinci Kernel List 
	<davinci-linux-open-source@...ux.davincidsp.com>
Subject: Re: [PATCH v2 4/7] ARM: davinci: Add support for an L3RAM gen_pool

Hi Matt,

On 9/29/2012 1:07 AM, Matt Porter wrote:
> L3RAM (shared SRAM) is needed for use by several drivers.
> This creates a genalloc pool and a hook for the platform code
> to provide the struct gen_pool * in platform data.
> 
> Signed-off-by: Matt Porter <mporter@...com>

I am not sure if any of the DaVinci devices have a need to allocate from
*both* ARM RAM and shared RAM. Shared RAM is not present on all DaVinci
devices AFAIR, and on DA850, there is just 8KB ARM RAM so I am not sure
if there is much point in trying to allocate from there.

Can you instead see if Ben's earlier patch[1] to use shared RAM for SRAM
allocation on DA850 makes sense for your case? If yes, can you repost
with Ben's patch included in your series instead of this patch? I would
prefer that over creating a new pool for shared RAM.

Thanks,
Sekhar

[1] https://patchwork.kernel.org/patch/840552/

Thanks,
Sekhar
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