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>
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@ -1,6 +1,7 @@
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config MIPS
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bool
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default y
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select HAVE_GENERIC_DMA_COHERENT
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select HAVE_IDE
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select HAVE_OPROFILE
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select HAVE_ARCH_KGDB
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@ -3,6 +3,7 @@
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#include <asm/scatterlist.h>
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#include <asm/cache.h>
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#include <asm-generic/dma-coherent.h>
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void *dma_alloc_noncoherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag);
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@ -73,14 +74,4 @@ extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr);
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extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction direction);
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#if 0
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#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
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extern int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
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dma_addr_t device_addr, size_t size, int flags);
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extern void dma_release_declared_memory(struct device *dev);
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extern void * dma_mark_declared_memory_occupied(struct device *dev,
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dma_addr_t device_addr, size_t size);
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#endif
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#endif /* _ASM_DMA_MAPPING_H */
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@ -90,6 +90,9 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
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{
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void *ret;
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if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
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return ret;
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gfp = massage_gfp_flags(dev, gfp);
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ret = (void *) __get_free_pages(gfp, get_order(size));
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@ -122,6 +125,10 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
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dma_addr_t dma_handle)
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{
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unsigned long addr = (unsigned long) vaddr;
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int order = get_order(size);
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if (dma_release_from_coherent(dev, order, vaddr))
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return;
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plat_unmap_dma_mem(dev, dma_handle, size, DMA_BIDIRECTIONAL);
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