From 48e1fd5a81416a037f5a48120bf281102f2584e2 Mon Sep 17 00:00:00 2001 From: David Daney Date: Fri, 1 Oct 2010 13:27:32 -0700 Subject: MIPS: Convert DMA to use dma-mapping-common.h Use asm-generic/dma-mapping-common.h to handle all DMA mapping operations and establish a default get_dma_ops() that forwards all operations to the existing code. Augment dev_archdata to carry a pointer to the struct dma_map_ops, allowing DMA operations to be overridden on a per device basis. Currently this is never filled in, so the default dma_map_ops are used. A follow-on patch sets this for Octeon PCI devices. Also initialize the dma_debug system as it is now used if it is configured. Includes fixes by Kevin Cernekee . Signed-off-by: David Daney Patchwork: http://patchwork.linux-mips.org/patch/1637/ Patchwork: http://patchwork.linux-mips.org/patch/1678/ Signed-off-by: Ralf Baechle --- arch/mips/include/asm/dma-mapping.h | 96 ++++++++++++++++++++++--------------- 1 file changed, 58 insertions(+), 38 deletions(-) (limited to 'arch/mips/include/asm/dma-mapping.h') diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h index 18fbf7af8e93..655f849bd08d 100644 --- a/arch/mips/include/asm/dma-mapping.h +++ b/arch/mips/include/asm/dma-mapping.h @@ -5,51 +5,41 @@ #include #include -void *dma_alloc_noncoherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flag); +#include -void dma_free_noncoherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle); +extern struct dma_map_ops *mips_dma_map_ops; -void *dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flag); +static inline struct dma_map_ops *get_dma_ops(struct device *dev) +{ + if (dev && dev->archdata.dma_ops) + return dev->archdata.dma_ops; + else + return mips_dma_map_ops; +} -void dma_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle); +static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) +{ + if (!dev->dma_mask) + return 0; -extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, - enum dma_data_direction direction); -extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, - size_t size, enum dma_data_direction direction); -extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction direction); -extern dma_addr_t dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, enum dma_data_direction direction); - -static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address, - size_t size, enum dma_data_direction direction) + return addr + size <= *dev->dma_mask; +} + +static inline void dma_mark_clean(void *addr, size_t size) {} + +#include + +static inline int dma_supported(struct device *dev, u64 mask) { - dma_unmap_single(dev, dma_address, size, direction); + struct dma_map_ops *ops = get_dma_ops(dev); + return ops->dma_supported(dev, mask); } -extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg, - int nhwentries, enum dma_data_direction direction); -extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction direction); -extern void dma_sync_single_for_device(struct device *dev, - dma_addr_t dma_handle, size_t size, enum dma_data_direction direction); -extern void dma_sync_single_range_for_cpu(struct device *dev, - dma_addr_t dma_handle, unsigned long offset, size_t size, - enum dma_data_direction direction); -extern void dma_sync_single_range_for_device(struct device *dev, - dma_addr_t dma_handle, unsigned long offset, size_t size, - enum dma_data_direction direction); -extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, - int nelems, enum dma_data_direction direction); -extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, - int nelems, enum dma_data_direction direction); -extern int dma_mapping_error(struct device *dev, dma_addr_t dma_addr); -extern int dma_supported(struct device *dev, u64 mask); +static inline int dma_mapping_error(struct device *dev, u64 mask) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + return ops->mapping_error(dev, mask); +} static inline int dma_set_mask(struct device *dev, u64 mask) @@ -65,4 +55,34 @@ dma_set_mask(struct device *dev, u64 mask) extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction direction); +static inline void *dma_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp) +{ + void *ret; + struct dma_map_ops *ops = get_dma_ops(dev); + + ret = ops->alloc_coherent(dev, size, dma_handle, gfp); + + debug_dma_alloc_coherent(dev, size, *dma_handle, ret); + + return ret; +} + +static inline void dma_free_coherent(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + + ops->free_coherent(dev, size, vaddr, dma_handle); + + debug_dma_free_coherent(dev, size, vaddr, dma_handle); +} + + +void *dma_alloc_noncoherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t flag); + +void dma_free_noncoherent(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle); + #endif /* _ASM_DMA_MAPPING_H */ -- cgit v1.2.3-59-g8ed1b