linux-kernel - [PATCH 2/5 v9] powerpc: Add iommu domain pointer to device archdata

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Date:	Thu, 14 Mar 2013 00:15:07 +0530
From:	Varun Sethi <Varun.Sethi@...escale.com>
To:	<joro@...tes.org>, <iommu@...ts.linux-foundation.org>,
	<linuxppc-dev@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>,
	<galak@...nel.crashing.org>, <benh@...nel.crashing.org>,
	<scottwood@...escale.com>, <stuart.yoder@...escale.com>
CC:	Varun Sethi <Varun.Sethi@...escale.com>
Subject: [PATCH 2/5 v9] powerpc: Add iommu domain pointer to device archdata

Add an iommu domain pointer to device (powerpc) archdata.  Devices
are attached to iommu domains and this pointer provides a mechanism
to correlate between a device and the associated iommu domain.  This
field is set when a device is attached to a domain.

Signed-off-by: Varun Sethi <Varun.Sethi@...escale.com>
---
 arch/powerpc/include/asm/device.h |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h
index 77e97dd..2d5c1c5 100644
--- a/arch/powerpc/include/asm/device.h
+++ b/arch/powerpc/include/asm/device.h
@@ -28,6 +28,12 @@ struct dev_archdata {
 		void		*iommu_table_base;
 	} dma_data;
 
+	/* IOMMU domain information pointer. This would be set
+	 * when this device is attached to an iommu_domain.
+	 */
+#ifdef CONFIG_IOMMU_API
+	void			*iommu_domain;
+#endif
 #ifdef CONFIG_SWIOTLB
 	dma_addr_t		max_direct_dma_addr;
 #endif
-- 
1.7.4.1


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