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@freescale.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Joerg Roedel <joro@8bytes.org>

diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h
index 77e97dd0c15d8b495ee245a3fbcc14aa38a2f785..38faeded7d595d506de55188ca8180c6e31ba67f 100644 (file)
--- a/arch/powerpc/include/asm/device.h
+++ b/arch/powerpc/include/asm/device.h
@@ -28,6 +28,9 @@ struct dev_archdata {
                void            *iommu_table_base;
        } dma_data;
 
+#ifdef CONFIG_IOMMU_API
+       void                    *iommu_domain;
+#endif
 #ifdef CONFIG_SWIOTLB
        dma_addr_t              max_direct_dma_addr;
 #endif