On Feb 27, 2013, at 6:04 AM, Sethi Varun-B16395 wrote:

Hi Kumar,Ben,
I am implementing the Freescale PAMU (IOMMU) driver using the Linux =

IOMMU API. In this particular patch, I have added a new field to =
dev_archdata structure to store the dma domain information.

This field is updated whenever we attach a device to an iommu domain.
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Regards
Varun

Would be good to see if this overlaps with Alexey's work for IOMMU =
driver for powernv.

- k

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quoted

-----Original Message-----
From: Joerg Roedel [mailto:joro@8bytes.org]
Sent: Wednesday, February 27, 2013 5:01 PM
To: Sethi Varun-B16395
Cc: iommu@lists.linux-foundation.org; linuxppc-dev@lists.ozlabs.org;
linux-kernel@vger.kernel.org; Wood Scott-B07421; Yoder Stuart-B08248
Subject: Re: [PATCH 1/6 v8] iommu/fsl: Store iommu domain information
pointer in archdata.
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On Mon, Feb 18, 2013 at 06:22:14PM +0530, Varun Sethi wrote:

quoted

Add a new field in the device (powerpc) archdata structure for =

storing

quoted

quoted

iommu domain information pointer. This pointer is stored when the
device is attached to a particular domain.
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Signed-off-by: Varun Sethi <redacted>
---
- no change.
arch/powerpc/include/asm/device.h |    4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
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diff --git a/arch/powerpc/include/asm/device.h

b/arch/powerpc/include/asm/device.h
index 77e97dd..6dc79fe 100644

--- a/arch/powerpc/include/asm/device.h
+++ b/arch/powerpc/include/asm/device.h

@@ -28,6 +28,10 @@ struct dev_archdata {

		void		*iommu_table_base;
	} dma_data;
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+	/* IOMMU domain information pointer. This would be set
+	 * when this device is attached to an iommu_domain.
+	 */
+	void			*iommu_domain;

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Please Cc the PowerPC Maintainers on this, so that they can have a =

look

quoted

at it. This also must be put this into an #ifdef CONFIG_IOMMU_API.
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	Joerg
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