mirror of https://gitee.com/openkylin/linux.git
dma-mapping: properly stub out the DMA API for !CONFIG_HAS_DMA
This avoids link failures in drivers using the DMA API, when they
are compiled for user mode Linux with CONFIG_COMPILE_TEST=y.
Fixes: 356da6d0cd ("dma-mapping: bypass indirect calls for dma-direct")
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig
parent
4788ba5792
commit
ed6ccf10f2
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@ -194,33 +194,6 @@ static inline int dma_mmap_from_global_coherent(struct vm_area_struct *vma,
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}
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#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */
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#ifdef CONFIG_HAS_DMA
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#include <asm/dma-mapping.h>
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static inline const struct dma_map_ops *get_dma_ops(struct device *dev)
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{
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if (dev && dev->dma_ops)
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return dev->dma_ops;
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return get_arch_dma_ops(dev ? dev->bus : NULL);
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}
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static inline void set_dma_ops(struct device *dev,
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const struct dma_map_ops *dma_ops)
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{
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dev->dma_ops = dma_ops;
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}
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#else
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/*
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* Define the dma api to allow compilation of dma dependent code.
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* Code that depends on the dma-mapping API needs to set 'depends on HAS_DMA'
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* in its Kconfig, unless it already depends on <something> || COMPILE_TEST,
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* where <something> guarantuees the availability of the dma-mapping API.
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*/
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static inline const struct dma_map_ops *get_dma_ops(struct device *dev)
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{
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return NULL;
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}
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#endif
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static inline bool dma_is_direct(const struct dma_map_ops *ops)
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{
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return likely(!ops);
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@ -284,6 +257,22 @@ static inline void dma_direct_sync_sg_for_cpu(struct device *dev,
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}
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#endif
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#ifdef CONFIG_HAS_DMA
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#include <asm/dma-mapping.h>
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static inline const struct dma_map_ops *get_dma_ops(struct device *dev)
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{
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if (dev && dev->dma_ops)
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return dev->dma_ops;
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return get_arch_dma_ops(dev ? dev->bus : NULL);
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}
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static inline void set_dma_ops(struct device *dev,
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const struct dma_map_ops *dma_ops)
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{
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dev->dma_ops = dma_ops;
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}
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static inline dma_addr_t dma_map_page_attrs(struct device *dev,
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struct page *page, size_t offset, size_t size,
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enum dma_data_direction dir, unsigned long attrs)
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@ -399,13 +388,6 @@ static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
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debug_dma_sync_single_for_cpu(dev, addr, size, dir);
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}
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static inline void dma_sync_single_range_for_cpu(struct device *dev,
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dma_addr_t addr, unsigned long offset, size_t size,
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enum dma_data_direction dir)
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{
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return dma_sync_single_for_cpu(dev, addr + offset, size, dir);
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}
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static inline void dma_sync_single_for_device(struct device *dev,
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dma_addr_t addr, size_t size,
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enum dma_data_direction dir)
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@ -420,13 +402,6 @@ static inline void dma_sync_single_for_device(struct device *dev,
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debug_dma_sync_single_for_device(dev, addr, size, dir);
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}
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static inline void dma_sync_single_range_for_device(struct device *dev,
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dma_addr_t addr, unsigned long offset, size_t size,
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enum dma_data_direction dir)
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{
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return dma_sync_single_for_device(dev, addr + offset, size, dir);
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}
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static inline void
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dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
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int nelems, enum dma_data_direction dir)
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@ -456,6 +431,138 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
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}
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static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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debug_dma_mapping_error(dev, dma_addr);
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if (dma_addr == DMA_MAPPING_ERROR)
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return -ENOMEM;
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return 0;
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}
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void *dma_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle,
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gfp_t flag, unsigned long attrs);
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void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr,
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dma_addr_t dma_handle, unsigned long attrs);
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void *dmam_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle,
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gfp_t gfp, unsigned long attrs);
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void dmam_free_coherent(struct device *dev, size_t size, void *vaddr,
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dma_addr_t dma_handle);
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void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction dir);
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int dma_get_sgtable_attrs(struct device *dev, struct sg_table *sgt,
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void *cpu_addr, dma_addr_t dma_addr, size_t size,
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unsigned long attrs);
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int dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
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void *cpu_addr, dma_addr_t dma_addr, size_t size,
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unsigned long attrs);
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int dma_supported(struct device *dev, u64 mask);
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int dma_set_mask(struct device *dev, u64 mask);
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int dma_set_coherent_mask(struct device *dev, u64 mask);
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u64 dma_get_required_mask(struct device *dev);
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#else /* CONFIG_HAS_DMA */
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static inline dma_addr_t dma_map_page_attrs(struct device *dev,
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struct page *page, size_t offset, size_t size,
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enum dma_data_direction dir, unsigned long attrs)
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{
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return DMA_MAPPING_ERROR;
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}
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static inline void dma_unmap_page_attrs(struct device *dev, dma_addr_t addr,
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size_t size, enum dma_data_direction dir, unsigned long attrs)
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{
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}
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static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir, unsigned long attrs)
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{
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return 0;
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}
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static inline void dma_unmap_sg_attrs(struct device *dev,
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struct scatterlist *sg, int nents, enum dma_data_direction dir,
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unsigned long attrs)
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{
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}
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static inline dma_addr_t dma_map_resource(struct device *dev,
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phys_addr_t phys_addr, size_t size, enum dma_data_direction dir,
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unsigned long attrs)
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{
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return DMA_MAPPING_ERROR;
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}
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static inline void dma_unmap_resource(struct device *dev, dma_addr_t addr,
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size_t size, enum dma_data_direction dir, unsigned long attrs)
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{
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}
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static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
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size_t size, enum dma_data_direction dir)
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{
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}
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static inline void dma_sync_single_for_device(struct device *dev,
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dma_addr_t addr, size_t size, enum dma_data_direction dir)
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{
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}
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static inline void dma_sync_sg_for_cpu(struct device *dev,
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struct scatterlist *sg, int nelems, enum dma_data_direction dir)
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{
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}
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static inline void dma_sync_sg_for_device(struct device *dev,
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struct scatterlist *sg, int nelems, enum dma_data_direction dir)
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{
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}
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static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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return -ENOMEM;
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}
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static inline void *dma_alloc_attrs(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs)
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{
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return NULL;
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}
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static void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr,
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dma_addr_t dma_handle, unsigned long attrs)
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{
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}
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static inline void *dmam_alloc_attrs(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
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{
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return NULL;
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}
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static inline void dmam_free_coherent(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle)
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{
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}
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static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction dir)
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{
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}
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static inline int dma_get_sgtable_attrs(struct device *dev,
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struct sg_table *sgt, void *cpu_addr, dma_addr_t dma_addr,
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size_t size, unsigned long attrs)
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{
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return -ENXIO;
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}
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static inline int dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
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void *cpu_addr, dma_addr_t dma_addr, size_t size,
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unsigned long attrs)
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{
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return -ENXIO;
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}
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static inline int dma_supported(struct device *dev, u64 mask)
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{
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return 0;
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}
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static inline int dma_set_mask(struct device *dev, u64 mask)
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{
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return -EIO;
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}
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static inline int dma_set_coherent_mask(struct device *dev, u64 mask)
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{
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return -EIO;
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}
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static inline u64 dma_get_required_mask(struct device *dev)
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{
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return 0;
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}
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#endif /* CONFIG_HAS_DMA */
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static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
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size_t size, enum dma_data_direction dir, unsigned long attrs)
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{
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@ -470,15 +577,28 @@ static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,
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return dma_unmap_page_attrs(dev, addr, size, dir, attrs);
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}
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static inline void dma_sync_single_range_for_cpu(struct device *dev,
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dma_addr_t addr, unsigned long offset, size_t size,
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enum dma_data_direction dir)
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{
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return dma_sync_single_for_cpu(dev, addr + offset, size, dir);
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}
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static inline void dma_sync_single_range_for_device(struct device *dev,
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dma_addr_t addr, unsigned long offset, size_t size,
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enum dma_data_direction dir)
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{
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return dma_sync_single_for_device(dev, addr + offset, size, dir);
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}
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#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, 0)
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#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, 0)
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#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
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#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, 0)
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#define dma_map_page(d, p, o, s, r) dma_map_page_attrs(d, p, o, s, r, 0)
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#define dma_unmap_page(d, a, s, r) dma_unmap_page_attrs(d, a, s, r, 0)
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void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction dir);
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#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, 0)
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#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, 0)
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extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
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void *cpu_addr, dma_addr_t dma_addr, size_t size,
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@ -498,25 +618,10 @@ bool dma_in_atomic_pool(void *start, size_t size);
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void *dma_alloc_from_pool(size_t size, struct page **ret_page, gfp_t flags);
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bool dma_free_from_pool(void *start, size_t size);
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int dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
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void *cpu_addr, dma_addr_t dma_addr, size_t size,
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unsigned long attrs);
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#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, 0)
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int
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dma_common_get_sgtable(struct device *dev, struct sg_table *sgt, void *cpu_addr,
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dma_addr_t dma_addr, size_t size, unsigned long attrs);
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int dma_get_sgtable_attrs(struct device *dev, struct sg_table *sgt,
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void *cpu_addr, dma_addr_t dma_addr, size_t size,
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unsigned long attrs);
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#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, 0)
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void *dma_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle,
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gfp_t flag, unsigned long attrs);
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void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr,
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dma_addr_t dma_handle, unsigned long attrs);
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static inline void *dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp)
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{
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@ -531,18 +636,6 @@ static inline void dma_free_coherent(struct device *dev, size_t size,
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return dma_free_attrs(dev, size, cpu_addr, dma_handle, 0);
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}
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static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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debug_dma_mapping_error(dev, dma_addr);
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if (dma_addr == DMA_MAPPING_ERROR)
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return -ENOMEM;
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return 0;
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}
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int dma_supported(struct device *dev, u64 mask);
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int dma_set_mask(struct device *dev, u64 mask);
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int dma_set_coherent_mask(struct device *dev, u64 mask);
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static inline u64 dma_get_mask(struct device *dev)
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{
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@ -575,8 +668,6 @@ static inline int dma_coerce_mask_and_coherent(struct device *dev, u64 mask)
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return dma_set_mask_and_coherent(dev, mask);
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}
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extern u64 dma_get_required_mask(struct device *dev);
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#ifndef arch_setup_dma_ops
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static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base,
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u64 size, const struct iommu_ops *iommu,
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@ -673,24 +764,6 @@ dma_mark_declared_memory_occupied(struct device *dev,
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}
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#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */
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/*
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* Managed DMA API
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*/
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#ifdef CONFIG_HAS_DMA
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extern void *dmam_alloc_attrs(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp,
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unsigned long attrs);
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extern void dmam_free_coherent(struct device *dev, size_t size, void *vaddr,
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dma_addr_t dma_handle);
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#else /* !CONFIG_HAS_DMA */
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static inline void *dmam_alloc_attrs(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp,
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unsigned long attrs)
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{ return NULL; }
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static inline void dmam_free_coherent(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle) { }
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#endif /* !CONFIG_HAS_DMA */
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static inline void *dmam_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp)
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{
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