From: Sascha Hauer <s.hauer@pengutronix.de>
To: Christoph Hellwig <hch@lst.de>
Cc: Shawn Guo <shawnguo@kernel.org>,
Fabio Estevam <fabio.estevam@nxp.com>,
linux-arm-kernel@lists.infradead.org,
iommu@lists.linux-foundation.org, linux-imx@nxp.com,
linux-kernel@vger.kernel.org, linux-sh@vger.kernel.org
Subject: Re: dma_declare_coherent_memory on main memory
Date: Mon, 10 Dec 2018 08:26:48 +0100 [thread overview]
Message-ID: <20181210072648.ore6xttedsgpndi4@pengutronix.de> (raw)
In-Reply-To: <20181207153432.GA24917@lst.de>
On Fri, Dec 07, 2018 at 04:34:32PM +0100, Christoph Hellwig wrote:
> Hi all,
>
> the ARM imx27/31 ports and various sh boards use
> dma_declare_coherent_memory on main memory taken from the memblock
> allocator.
>
> Is there any good reason these couldn't be switched to CMA areas?
> Getting rid of these magic dma_declare_coherent_memory area would
> help making the dma allocator a lot simpler.
At least for i.MX27/31 I'd say this predates CMA support, so historical
reasons.
Sascha
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next prev parent reply other threads:[~2018-12-10 7:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-07 15:34 dma_declare_coherent_memory on main memory Christoph Hellwig
[not found] ` <20181207153432.GA24917-jcswGhMUV9g@public.gmane.org>
2018-12-08 21:25 ` Rob Landley
2018-12-10 7:26 ` Sascha Hauer [this message]
2018-12-10 19:02 ` Christoph Hellwig
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