From d3fa60d7bfdc9a0ff1a524bdef96b3db1fd62022 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 8 Jul 2020 09:45:11 +0200 Subject: [PATCH] dma-mapping: move the remaining DMA API calls out of line For a long time the DMA API has been implemented inline in dma-mapping.h, but the function bodies can be quite large. Move them all out of line. This also removes all the dma_direct_* exports as those are just implementation details and should never be used by drivers directly. Signed-off-by: Christoph Hellwig Tested-by: Alexey Kardashevskiy Reviewed-by: Alexey Kardashevskiy --- include/linux/dma-direct.h | 58 +++++++++ include/linux/dma-mapping.h | 247 ++++-------------------------------- kernel/dma/direct.c | 9 -- kernel/dma/mapping.c | 164 ++++++++++++++++++++++++ 4 files changed, 244 insertions(+), 234 deletions(-) diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h index ab2e20cba951..2b045c509146 100644 --- a/include/linux/dma-direct.h +++ b/include/linux/dma-direct.h @@ -87,4 +87,62 @@ int dma_direct_mmap(struct device *dev, struct vm_area_struct *vma, unsigned long attrs); int dma_direct_supported(struct device *dev, u64 mask); bool dma_direct_need_sync(struct device *dev, dma_addr_t dma_addr); +dma_addr_t dma_direct_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, enum dma_data_direction dir, + unsigned long attrs); +int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents, + enum dma_data_direction dir, unsigned long attrs); +dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir, unsigned long attrs); + +#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \ + defined(CONFIG_SWIOTLB) +void dma_direct_sync_single_for_device(struct device *dev, + dma_addr_t addr, size_t size, enum dma_data_direction dir); +void dma_direct_sync_sg_for_device(struct device *dev, + struct scatterlist *sgl, int nents, enum dma_data_direction dir); +#else +static inline void dma_direct_sync_single_for_device(struct device *dev, + dma_addr_t addr, size_t size, enum dma_data_direction dir) +{ +} +static inline void dma_direct_sync_sg_for_device(struct device *dev, + struct scatterlist *sgl, int nents, enum dma_data_direction dir) +{ +} +#endif + +#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) || \ + defined(CONFIG_SWIOTLB) +void dma_direct_unmap_page(struct device *dev, dma_addr_t addr, + size_t size, enum dma_data_direction dir, unsigned long attrs); +void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl, + int nents, enum dma_data_direction dir, unsigned long attrs); +void dma_direct_sync_single_for_cpu(struct device *dev, + dma_addr_t addr, size_t size, enum dma_data_direction dir); +void dma_direct_sync_sg_for_cpu(struct device *dev, + struct scatterlist *sgl, int nents, enum dma_data_direction dir); +#else +static inline void dma_direct_unmap_page(struct device *dev, dma_addr_t addr, + size_t size, enum dma_data_direction dir, unsigned long attrs) +{ +} +static inline void dma_direct_unmap_sg(struct device *dev, + struct scatterlist *sgl, int nents, enum dma_data_direction dir, + unsigned long attrs) +{ +} +static inline void dma_direct_sync_single_for_cpu(struct device *dev, + dma_addr_t addr, size_t size, enum dma_data_direction dir) +{ +} +static inline void dma_direct_sync_sg_for_cpu(struct device *dev, + struct scatterlist *sgl, int nents, enum dma_data_direction dir) +{ +} +#endif + +size_t dma_direct_max_mapping_size(struct device *dev); + #endif /* _LINUX_DMA_DIRECT_H */ diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index a33ed3954ed4..bd0a6f5ee445 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -188,73 +188,6 @@ static inline int dma_mmap_from_global_coherent(struct vm_area_struct *vma, } #endif /* CONFIG_DMA_DECLARE_COHERENT */ -static inline bool dma_is_direct(const struct dma_map_ops *ops) -{ - return likely(!ops); -} - -/* - * All the dma_direct_* declarations are here just for the indirect call bypass, - * and must not be used directly drivers! - */ -dma_addr_t dma_direct_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, enum dma_data_direction dir, - unsigned long attrs); -int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents, - enum dma_data_direction dir, unsigned long attrs); -dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr, - size_t size, enum dma_data_direction dir, unsigned long attrs); - -#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \ - defined(CONFIG_SWIOTLB) -void dma_direct_sync_single_for_device(struct device *dev, - dma_addr_t addr, size_t size, enum dma_data_direction dir); -void dma_direct_sync_sg_for_device(struct device *dev, - struct scatterlist *sgl, int nents, enum dma_data_direction dir); -#else -static inline void dma_direct_sync_single_for_device(struct device *dev, - dma_addr_t addr, size_t size, enum dma_data_direction dir) -{ -} -static inline void dma_direct_sync_sg_for_device(struct device *dev, - struct scatterlist *sgl, int nents, enum dma_data_direction dir) -{ -} -#endif - -#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ - defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) || \ - defined(CONFIG_SWIOTLB) -void dma_direct_unmap_page(struct device *dev, dma_addr_t addr, - size_t size, enum dma_data_direction dir, unsigned long attrs); -void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl, - int nents, enum dma_data_direction dir, unsigned long attrs); -void dma_direct_sync_single_for_cpu(struct device *dev, - dma_addr_t addr, size_t size, enum dma_data_direction dir); -void dma_direct_sync_sg_for_cpu(struct device *dev, - struct scatterlist *sgl, int nents, enum dma_data_direction dir); -#else -static inline void dma_direct_unmap_page(struct device *dev, dma_addr_t addr, - size_t size, enum dma_data_direction dir, unsigned long attrs) -{ -} -static inline void dma_direct_unmap_sg(struct device *dev, - struct scatterlist *sgl, int nents, enum dma_data_direction dir, - unsigned long attrs) -{ -} -static inline void dma_direct_sync_single_for_cpu(struct device *dev, - dma_addr_t addr, size_t size, enum dma_data_direction dir) -{ -} -static inline void dma_direct_sync_sg_for_cpu(struct device *dev, - struct scatterlist *sgl, int nents, enum dma_data_direction dir) -{ -} -#endif - -size_t dma_direct_max_mapping_size(struct device *dev); - #ifdef CONFIG_HAS_DMA #include @@ -271,164 +204,6 @@ static inline void set_dma_ops(struct device *dev, dev->dma_ops = dma_ops; } -static inline dma_addr_t dma_map_page_attrs(struct device *dev, - struct page *page, size_t offset, size_t size, - enum dma_data_direction dir, unsigned long attrs) -{ - const struct dma_map_ops *ops = get_dma_ops(dev); - dma_addr_t addr; - - BUG_ON(!valid_dma_direction(dir)); - if (dma_is_direct(ops)) - addr = dma_direct_map_page(dev, page, offset, size, dir, attrs); - else - addr = ops->map_page(dev, page, offset, size, dir, attrs); - debug_dma_map_page(dev, page, offset, size, dir, addr); - - return addr; -} - -static inline void dma_unmap_page_attrs(struct device *dev, dma_addr_t addr, - size_t size, enum dma_data_direction dir, unsigned long attrs) -{ - const struct dma_map_ops *ops = get_dma_ops(dev); - - BUG_ON(!valid_dma_direction(dir)); - if (dma_is_direct(ops)) - dma_direct_unmap_page(dev, addr, size, dir, attrs); - else if (ops->unmap_page) - ops->unmap_page(dev, addr, size, dir, attrs); - debug_dma_unmap_page(dev, addr, size, dir); -} - -/* - * dma_maps_sg_attrs returns 0 on error and > 0 on success. - * It should never return a value < 0. - */ -static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, - unsigned long attrs) -{ - const struct dma_map_ops *ops = get_dma_ops(dev); - int ents; - - BUG_ON(!valid_dma_direction(dir)); - if (dma_is_direct(ops)) - ents = dma_direct_map_sg(dev, sg, nents, dir, attrs); - else - ents = ops->map_sg(dev, sg, nents, dir, attrs); - BUG_ON(ents < 0); - debug_dma_map_sg(dev, sg, nents, ents, dir); - - return ents; -} - -static inline void dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, - unsigned long attrs) -{ - const struct dma_map_ops *ops = get_dma_ops(dev); - - BUG_ON(!valid_dma_direction(dir)); - debug_dma_unmap_sg(dev, sg, nents, dir); - if (dma_is_direct(ops)) - dma_direct_unmap_sg(dev, sg, nents, dir, attrs); - else if (ops->unmap_sg) - ops->unmap_sg(dev, sg, nents, dir, attrs); -} - -static inline dma_addr_t dma_map_resource(struct device *dev, - phys_addr_t phys_addr, - size_t size, - enum dma_data_direction dir, - unsigned long attrs) -{ - const struct dma_map_ops *ops = get_dma_ops(dev); - dma_addr_t addr = DMA_MAPPING_ERROR; - - BUG_ON(!valid_dma_direction(dir)); - - /* Don't allow RAM to be mapped */ - if (WARN_ON_ONCE(pfn_valid(PHYS_PFN(phys_addr)))) - return DMA_MAPPING_ERROR; - - if (dma_is_direct(ops)) - addr = dma_direct_map_resource(dev, phys_addr, size, dir, attrs); - else if (ops->map_resource) - addr = ops->map_resource(dev, phys_addr, size, dir, attrs); - - debug_dma_map_resource(dev, phys_addr, size, dir, addr); - return addr; -} - -static inline void dma_unmap_resource(struct device *dev, dma_addr_t addr, - size_t size, enum dma_data_direction dir, - unsigned long attrs) -{ - const struct dma_map_ops *ops = get_dma_ops(dev); - - BUG_ON(!valid_dma_direction(dir)); - if (!dma_is_direct(ops) && ops->unmap_resource) - ops->unmap_resource(dev, addr, size, dir, attrs); - debug_dma_unmap_resource(dev, addr, size, dir); -} - -static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, - size_t size, - enum dma_data_direction dir) -{ - const struct dma_map_ops *ops = get_dma_ops(dev); - - BUG_ON(!valid_dma_direction(dir)); - if (dma_is_direct(ops)) - dma_direct_sync_single_for_cpu(dev, addr, size, dir); - else if (ops->sync_single_for_cpu) - ops->sync_single_for_cpu(dev, addr, size, dir); - debug_dma_sync_single_for_cpu(dev, addr, size, dir); -} - -static inline void dma_sync_single_for_device(struct device *dev, - dma_addr_t addr, size_t size, - enum dma_data_direction dir) -{ - const struct dma_map_ops *ops = get_dma_ops(dev); - - BUG_ON(!valid_dma_direction(dir)); - if (dma_is_direct(ops)) - dma_direct_sync_single_for_device(dev, addr, size, dir); - else if (ops->sync_single_for_device) - ops->sync_single_for_device(dev, addr, size, dir); - debug_dma_sync_single_for_device(dev, addr, size, dir); -} - -static inline void -dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, - int nelems, enum dma_data_direction dir) -{ - const struct dma_map_ops *ops = get_dma_ops(dev); - - BUG_ON(!valid_dma_direction(dir)); - if (dma_is_direct(ops)) - dma_direct_sync_sg_for_cpu(dev, sg, nelems, dir); - else if (ops->sync_sg_for_cpu) - ops->sync_sg_for_cpu(dev, sg, nelems, dir); - debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir); -} - -static inline void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, - int nelems, enum dma_data_direction dir) -{ - const struct dma_map_ops *ops = get_dma_ops(dev); - - BUG_ON(!valid_dma_direction(dir)); - if (dma_is_direct(ops)) - dma_direct_sync_sg_for_device(dev, sg, nelems, dir); - else if (ops->sync_sg_for_device) - ops->sync_sg_for_device(dev, sg, nelems, dir); - debug_dma_sync_sg_for_device(dev, sg, nelems, dir); - -} static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) { @@ -439,6 +214,28 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) return 0; } +dma_addr_t dma_map_page_attrs(struct device *dev, struct page *page, + size_t offset, size_t size, enum dma_data_direction dir, + unsigned long attrs); +void dma_unmap_page_attrs(struct device *dev, dma_addr_t addr, size_t size, + enum dma_data_direction dir, unsigned long attrs); +int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction dir, unsigned long attrs); +void dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir, + unsigned long attrs); +dma_addr_t dma_map_resource(struct device *dev, phys_addr_t phys_addr, + size_t size, enum dma_data_direction dir, unsigned long attrs); +void dma_unmap_resource(struct device *dev, dma_addr_t addr, size_t size, + enum dma_data_direction dir, unsigned long attrs); +void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, + enum dma_data_direction dir); +void dma_sync_single_for_device(struct device *dev, dma_addr_t addr, + size_t size, enum dma_data_direction dir); +void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, + int nelems, enum dma_data_direction dir); +void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, + int nelems, enum dma_data_direction dir); void *dma_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs); void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr, diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 67f060b86a73..e545d14fccee 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -315,7 +315,6 @@ void dma_direct_sync_single_for_device(struct device *dev, if (!dev_is_dma_coherent(dev)) arch_sync_dma_for_device(paddr, size, dir); } -EXPORT_SYMBOL(dma_direct_sync_single_for_device); void dma_direct_sync_sg_for_device(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction dir) @@ -335,7 +334,6 @@ void dma_direct_sync_sg_for_device(struct device *dev, dir); } } -EXPORT_SYMBOL(dma_direct_sync_sg_for_device); #endif #if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ @@ -354,7 +352,6 @@ void dma_direct_sync_single_for_cpu(struct device *dev, if (unlikely(is_swiotlb_buffer(paddr))) swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_CPU); } -EXPORT_SYMBOL(dma_direct_sync_single_for_cpu); void dma_direct_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction dir) @@ -376,7 +373,6 @@ void dma_direct_sync_sg_for_cpu(struct device *dev, if (!dev_is_dma_coherent(dev)) arch_sync_dma_for_cpu_all(); } -EXPORT_SYMBOL(dma_direct_sync_sg_for_cpu); void dma_direct_unmap_page(struct device *dev, dma_addr_t addr, size_t size, enum dma_data_direction dir, unsigned long attrs) @@ -389,7 +385,6 @@ void dma_direct_unmap_page(struct device *dev, dma_addr_t addr, if (unlikely(is_swiotlb_buffer(phys))) swiotlb_tbl_unmap_single(dev, phys, size, size, dir, attrs); } -EXPORT_SYMBOL(dma_direct_unmap_page); void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction dir, unsigned long attrs) @@ -401,7 +396,6 @@ void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl, dma_direct_unmap_page(dev, sg->dma_address, sg_dma_len(sg), dir, attrs); } -EXPORT_SYMBOL(dma_direct_unmap_sg); #endif dma_addr_t dma_direct_map_page(struct device *dev, struct page *page, @@ -428,7 +422,6 @@ dma_addr_t dma_direct_map_page(struct device *dev, struct page *page, arch_sync_dma_for_device(phys, size, dir); return dma_addr; } -EXPORT_SYMBOL(dma_direct_map_page); int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction dir, unsigned long attrs) @@ -450,7 +443,6 @@ int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents, dma_direct_unmap_sg(dev, sgl, i, dir, attrs | DMA_ATTR_SKIP_CPU_SYNC); return 0; } -EXPORT_SYMBOL(dma_direct_map_sg); dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr, size_t size, enum dma_data_direction dir, unsigned long attrs) @@ -467,7 +459,6 @@ dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr, return dma_addr; } -EXPORT_SYMBOL(dma_direct_map_resource); int dma_direct_get_sgtable(struct device *dev, struct sg_table *sgt, void *cpu_addr, dma_addr_t dma_addr, size_t size, diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index a8c18c9a796f..b53953024512 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -105,6 +105,170 @@ void *dmam_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle, } EXPORT_SYMBOL(dmam_alloc_attrs); +static inline bool dma_is_direct(const struct dma_map_ops *ops) +{ + return likely(!ops); +} + +dma_addr_t dma_map_page_attrs(struct device *dev, struct page *page, + size_t offset, size_t size, enum dma_data_direction dir, + unsigned long attrs) +{ + const struct dma_map_ops *ops = get_dma_ops(dev); + dma_addr_t addr; + + BUG_ON(!valid_dma_direction(dir)); + if (dma_is_direct(ops)) + addr = dma_direct_map_page(dev, page, offset, size, dir, attrs); + else + addr = ops->map_page(dev, page, offset, size, dir, attrs); + debug_dma_map_page(dev, page, offset, size, dir, addr); + + return addr; +} +EXPORT_SYMBOL(dma_map_page_attrs); + +void dma_unmap_page_attrs(struct device *dev, dma_addr_t addr, size_t size, + enum dma_data_direction dir, unsigned long attrs) +{ + const struct dma_map_ops *ops = get_dma_ops(dev); + + BUG_ON(!valid_dma_direction(dir)); + if (dma_is_direct(ops)) + dma_direct_unmap_page(dev, addr, size, dir, attrs); + else if (ops->unmap_page) + ops->unmap_page(dev, addr, size, dir, attrs); + debug_dma_unmap_page(dev, addr, size, dir); +} +EXPORT_SYMBOL(dma_unmap_page_attrs); + +/* + * dma_maps_sg_attrs returns 0 on error and > 0 on success. + * It should never return a value < 0. + */ +int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction dir, unsigned long attrs) +{ + const struct dma_map_ops *ops = get_dma_ops(dev); + int ents; + + BUG_ON(!valid_dma_direction(dir)); + if (dma_is_direct(ops)) + ents = dma_direct_map_sg(dev, sg, nents, dir, attrs); + else + ents = ops->map_sg(dev, sg, nents, dir, attrs); + BUG_ON(ents < 0); + debug_dma_map_sg(dev, sg, nents, ents, dir); + + return ents; +} +EXPORT_SYMBOL(dma_map_sg_attrs); + +void dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir, + unsigned long attrs) +{ + const struct dma_map_ops *ops = get_dma_ops(dev); + + BUG_ON(!valid_dma_direction(dir)); + debug_dma_unmap_sg(dev, sg, nents, dir); + if (dma_is_direct(ops)) + dma_direct_unmap_sg(dev, sg, nents, dir, attrs); + else if (ops->unmap_sg) + ops->unmap_sg(dev, sg, nents, dir, attrs); +} +EXPORT_SYMBOL(dma_unmap_sg_attrs); + +dma_addr_t dma_map_resource(struct device *dev, phys_addr_t phys_addr, + size_t size, enum dma_data_direction dir, unsigned long attrs) +{ + const struct dma_map_ops *ops = get_dma_ops(dev); + dma_addr_t addr = DMA_MAPPING_ERROR; + + BUG_ON(!valid_dma_direction(dir)); + + /* Don't allow RAM to be mapped */ + if (WARN_ON_ONCE(pfn_valid(PHYS_PFN(phys_addr)))) + return DMA_MAPPING_ERROR; + + if (dma_is_direct(ops)) + addr = dma_direct_map_resource(dev, phys_addr, size, dir, attrs); + else if (ops->map_resource) + addr = ops->map_resource(dev, phys_addr, size, dir, attrs); + + debug_dma_map_resource(dev, phys_addr, size, dir, addr); + return addr; +} +EXPORT_SYMBOL(dma_map_resource); + +void dma_unmap_resource(struct device *dev, dma_addr_t addr, size_t size, + enum dma_data_direction dir, unsigned long attrs) +{ + const struct dma_map_ops *ops = get_dma_ops(dev); + + BUG_ON(!valid_dma_direction(dir)); + if (!dma_is_direct(ops) && ops->unmap_resource) + ops->unmap_resource(dev, addr, size, dir, attrs); + debug_dma_unmap_resource(dev, addr, size, dir); +} +EXPORT_SYMBOL(dma_unmap_resource); + +void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, size_t size, + enum dma_data_direction dir) +{ + const struct dma_map_ops *ops = get_dma_ops(dev); + + BUG_ON(!valid_dma_direction(dir)); + if (dma_is_direct(ops)) + dma_direct_sync_single_for_cpu(dev, addr, size, dir); + else if (ops->sync_single_for_cpu) + ops->sync_single_for_cpu(dev, addr, size, dir); + debug_dma_sync_single_for_cpu(dev, addr, size, dir); +} +EXPORT_SYMBOL(dma_sync_single_for_cpu); + +void dma_sync_single_for_device(struct device *dev, dma_addr_t addr, + size_t size, enum dma_data_direction dir) +{ + const struct dma_map_ops *ops = get_dma_ops(dev); + + BUG_ON(!valid_dma_direction(dir)); + if (dma_is_direct(ops)) + dma_direct_sync_single_for_device(dev, addr, size, dir); + else if (ops->sync_single_for_device) + ops->sync_single_for_device(dev, addr, size, dir); + debug_dma_sync_single_for_device(dev, addr, size, dir); +} +EXPORT_SYMBOL(dma_sync_single_for_device); + +void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, + int nelems, enum dma_data_direction dir) +{ + const struct dma_map_ops *ops = get_dma_ops(dev); + + BUG_ON(!valid_dma_direction(dir)); + if (dma_is_direct(ops)) + dma_direct_sync_sg_for_cpu(dev, sg, nelems, dir); + else if (ops->sync_sg_for_cpu) + ops->sync_sg_for_cpu(dev, sg, nelems, dir); + debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir); +} +EXPORT_SYMBOL(dma_sync_sg_for_cpu); + +void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, + int nelems, enum dma_data_direction dir) +{ + const struct dma_map_ops *ops = get_dma_ops(dev); + + BUG_ON(!valid_dma_direction(dir)); + if (dma_is_direct(ops)) + dma_direct_sync_sg_for_device(dev, sg, nelems, dir); + else if (ops->sync_sg_for_device) + ops->sync_sg_for_device(dev, sg, nelems, dir); + debug_dma_sync_sg_for_device(dev, sg, nelems, dir); +} +EXPORT_SYMBOL(dma_sync_sg_for_device); + /* * Create scatter-list for the already allocated DMA buffer. */ -- GitLab