linux-kernel - Re: [PATCH] arm: dma-mapping: move consistent_init to early

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Date:	Fri, 17 Dec 2010 10:56:57 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Saravana Kannan <skannan@...eaurora.org>
Cc:	Catalin Marinas <catalin.marinas@....com>, dwalker@...eaurora.org,
	linux-arm-msm@...r.kernel.org, Nicolas Pitre <nico@...vell.com>,
	linux-kernel@...r.kernel.org,
	Jeff Ohlstein <johlstei@...eaurora.org>,
	Tejun Heo <tj@...nel.org>, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] arm: dma-mapping: move consistent_init to
	early_initcall

On Fri, Dec 17, 2010 at 02:26:44AM -0800, Saravana Kannan wrote:
> After Catalin's response to clarify, if we still end up not treating
> secure domain as a "DMA device", then what's the alternative? Can we get
> an explicit "cache invalidate API" that's outside of the DMA APIs? Or a
> general uncached pages alloc/free APIs?

The answer _always_ is that if the existing APIs don't give you want
you need, then either the APIs need extending or a new API needs to
be created.

In any case, have you looked at the latest set of SCM patches?  They
don't make use of DMA coherent memory anymore, so the problem would
seem to be resolved.
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