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| author | Becky Bruce <beckyb@kernel.crashing.org> | 2009-09-21 08:26:34 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-09-24 15:31:43 +1000 |
| commit | 1cebd7a0f62804ca24f7b7b35e8105000b9e879a (patch) | |
| tree | 57f04a5882d595cab859e2820d998bcde4660074 /arch/powerpc/include | |
| parent | b9eceb2307f8dda124669a9dc213aad8c1569b5a (diff) | |
| download | linux-1cebd7a0f62804ca24f7b7b35e8105000b9e879a.tar.bz2 | |
powerpc: Rename get_dma_direct_offset get_dma_offset
The former is no longer really accurate with the swiotlb case now
a possibility. I also move it into dma-mapping.h - it no longer
needs to be in dma.c, and there are about to be some more accessors
that should all end up in the same place. A comment is added to
indicate that this function is not used in configs where there is no
simple dma offset, such as the iommu case.
Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/dma-mapping.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h index cb2ca41dd526..34b919fe8cda 100644 --- a/arch/powerpc/include/asm/dma-mapping.h +++ b/arch/powerpc/include/asm/dma-mapping.h @@ -26,7 +26,6 @@ extern void *dma_direct_alloc_coherent(struct device *dev, size_t size, extern void dma_direct_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle); -extern unsigned long get_dma_direct_offset(struct device *dev); #ifdef CONFIG_NOT_COHERENT_CACHE /* @@ -90,6 +89,22 @@ static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops) dev->archdata.dma_ops = ops; } +/* + * get_dma_offset() + * + * Get the dma offset on configurations where the dma address can be determined + * from the physical address by looking at a simple offset. Direct dma and + * swiotlb use this function, but it is typically not used by implementations + * with an iommu. + */ +static inline unsigned long get_dma_offset(struct device *dev) +{ + if (dev) + return (unsigned long)dev->archdata.dma_data; + + return PCI_DRAM_OFFSET; +} + /* this will be removed soon */ #define flush_write_buffers() @@ -181,12 +196,12 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) { - return paddr + get_dma_direct_offset(dev); + return paddr + get_dma_offset(dev); } static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) { - return daddr - get_dma_direct_offset(dev); + return daddr - get_dma_offset(dev); } #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |