linux-kernel - Re: [PATCH v3 2/8] dma-mapping: add {map,unmap}_resource to dma_map

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Date:	Wed, 10 Feb 2016 15:11:03 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Niklas Söderlund 
	<niklas.soderlund+renesas@...natech.se>,
	linux-renesas-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	dmaengine@...r.kernel.org, iommu@...ts.linux-foundation.org
Cc:	robin.murphy@....com, vinod.koul@...el.com,
	laurent.pinchart@...asonboard.com, geert+renesas@...der.be,
	linus.walleij@...aro.org, dan.j.williams@...el.com, arnd@...db.de,
	linux-arch@...r.kernel.org
Subject: Re: [PATCH v3 2/8] dma-mapping: add {map,unmap}_resource to
 dma_map_ops

Hello.

On 2/10/2016 3:57 AM, Niklas Söderlund wrote:

> Add methods to handle mapping of device resources from a physical
> address. This is needed for example to map be able to map MMIO FIFO
                                          ^^^ not needed

> registers to a IOMMU.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
[...]

MBR, Sergei