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authorWill Deacon <will.deacon@arm.com>2014-08-27 17:52:44 +0100
committerWill Deacon <will.deacon@arm.com>2014-12-01 16:51:35 +0000
commit4bb25789ed28228a52c030bf28edb2fcdb214be8 (patch)
treeaafa892add12a5acb47c69696de5dd7c95e0251e /arch/arm/include/asm/dma-mapping.h
parentaf4dda732ea044517f8beed4a38c852ea97e7690 (diff)
arm: dma-mapping: plumb our iommu mapping ops into arch_setup_dma_ops
This patch plumbs the existing ARM IOMMU DMA infrastructure (which isn't actually called outside of a few drivers) into arch_setup_dma_ops, so that we can use IOMMUs for DMA transfers in a more generic fashion. Since this significantly complicates the arch_setup_dma_ops function, it is moved out of line into dma-mapping.c. If CONFIG_ARM_DMA_USE_IOMMU is not set, the iommu parameter is ignored and the normal ops are used instead. Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm/include/asm/dma-mapping.h')
-rw-r--r--arch/arm/include/asm/dma-mapping.h12
1 files changed, 5 insertions, 7 deletions
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index f3c0d953f6a2..9410b7e548fc 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -121,14 +121,12 @@ static inline unsigned long dma_max_pfn(struct device *dev)
}
#define dma_max_pfn(dev) dma_max_pfn(dev)
-static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base,
- u64 size, struct iommu_ops *iommu,
- bool coherent)
-{
- if (coherent)
- set_dma_ops(dev, &arm_coherent_dma_ops);
-}
#define arch_setup_dma_ops arch_setup_dma_ops
+extern void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
+ struct iommu_ops *iommu, bool coherent);
+
+#define arch_teardown_dma_ops arch_teardown_dma_ops
+extern void arch_teardown_dma_ops(struct device *dev);
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{