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| author |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2015-06-24 15:25:22 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2015-07-13 10:10:54 +1000 |
| commit | 2db4928bb559f8b43ca75879548111dc13a7de31 (patch) | |
| tree | 8ce6264c97956c84ad19c43786729b04ae2ffd2d /arch/powerpc/include/asm/device.h | |
| parent | cxl: use more common format specifier (diff) | |
| download | linux-dev-2db4928bb559f8b43ca75879548111dc13a7de31.tar.xz linux-dev-2db4928bb559f8b43ca75879548111dc13a7de31.zip | |
powerpc/iommu: Remove dma_data union
To support "hybrid" DMA ops in a subsequent patch, we will need both
a direct DMA offset and an iommu pointer. Those are currently exclusive
(a union), so change them to be separate fields.
While there, also type iommu_table_base properly and make exist only
on CONFIG_PPC64 since it's not referenced on 32-bit at all.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/device.h')
| -rw-r--r-- | arch/powerpc/include/asm/device.h | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h index e9bdda88f1fb..406c2b1ff82d 100644 --- a/arch/powerpc/include/asm/device.h +++ b/arch/powerpc/include/asm/device.h @@ -10,6 +10,7 @@ struct dma_map_ops; struct device_node; #ifdef CONFIG_PPC64 struct pci_dn; +struct iommu_table; #endif /* @@ -23,13 +24,15 @@ struct dev_archdata { struct dma_map_ops *dma_ops; /* - * When an iommu is in use, dma_data is used as a ptr to the base of the - * iommu_table. Otherwise, it is a simple numerical offset. + * These two used to be a union. However, with the hybrid ops we need + * both so here we store both a DMA offset for direct mappings and + * an iommu_table for remapped DMA. */ - union { - dma_addr_t dma_offset; - void *iommu_table_base; - } dma_data; + dma_addr_t dma_offset; + +#ifdef CONFIG_PPC64 + struct iommu_table *iommu_table_base; +#endif #ifdef CONFIG_IOMMU_API void *iommu_domain; |