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| author | Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> | 2009-06-04 00:16:04 +0900 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-11-13 18:10:37 +0100 |
| commit | f8ac04255dc8baa1c018e8028222d842efa56e6b (patch) | |
| tree | 4aedfaf3f4a2e5f0ffbc3280fa94e48e10ac9e38 /arch/mips | |
| parent | da0bac33413b2888d3623dad3ad19ce76b688f07 (diff) | |
| download | kernel_samsung_smdk4412-f8ac04255dc8baa1c018e8028222d842efa56e6b.zip kernel_samsung_smdk4412-f8ac04255dc8baa1c018e8028222d842efa56e6b.tar.gz kernel_samsung_smdk4412-f8ac04255dc8baa1c018e8028222d842efa56e6b.tar.bz2 | |
MIPS: Add DMA declare coherent memory support
The ohci-sm501 driver requires dma_declare_coherent_memory(). It is used
by the driver's local memory allocation with dma_alloc_coherent().
Tested on TANBAC TB0287(VR4131 + SM501).
[Ralf: Fixed reject in dma-default.c and removed the entire #if 0'ed block
in dma-mapping.h instead of just the #if 0.]
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/Kconfig | 1 | ||||
| -rw-r--r-- | arch/mips/include/asm/dma-mapping.h | 11 | ||||
| -rw-r--r-- | arch/mips/mm/dma-default.c | 7 |
3 files changed, 9 insertions, 10 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 03bd56a..1aad0d9 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1,6 +1,7 @@ config MIPS bool default y + select HAVE_GENERIC_DMA_COHERENT select HAVE_IDE select HAVE_OPROFILE select HAVE_ARCH_KGDB diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h index d16afdd..664ba53 100644 --- a/arch/mips/include/asm/dma-mapping.h +++ b/arch/mips/include/asm/dma-mapping.h @@ -3,6 +3,7 @@ #include <asm/scatterlist.h> #include <asm/cache.h> +#include <asm-generic/dma-coherent.h> void *dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag); @@ -73,14 +74,4 @@ extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr); extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction direction); -#if 0 -#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY - -extern int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, - dma_addr_t device_addr, size_t size, int flags); -extern void dma_release_declared_memory(struct device *dev); -extern void * dma_mark_declared_memory_occupied(struct device *dev, - dma_addr_t device_addr, size_t size); -#endif - #endif /* _ASM_DMA_MAPPING_H */ diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c index 7e48e76..9367e33 100644 --- a/arch/mips/mm/dma-default.c +++ b/arch/mips/mm/dma-default.c @@ -90,6 +90,9 @@ void *dma_alloc_coherent(struct device *dev, size_t size, { void *ret; + if (dma_alloc_from_coherent(dev, size, dma_handle, &ret)) + return ret; + gfp = massage_gfp_flags(dev, gfp); ret = (void *) __get_free_pages(gfp, get_order(size)); @@ -122,6 +125,10 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle) { unsigned long addr = (unsigned long) vaddr; + int order = get_order(size); + + if (dma_release_from_coherent(dev, order, vaddr)) + return; plat_unmap_dma_mem(dev, dma_handle, size, DMA_BIDIRECTIONAL); |