/**
* List of possible attributes associated with a DMA mapping. The semantics
- * of each attribute should be defined in Documentation/DMA-attributes.txt.
+ * of each attribute should be defined in Documentation/core-api/dma-attributes.rst.
*/
/*
}
#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 <asm/dma-mapping.h>
+#ifdef CONFIG_DMA_OPS
static inline const struct dma_map_ops *get_dma_ops(struct device *dev)
{
if (dev->dma_ops)
{
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)
+#else /* CONFIG_DMA_OPS */
+static inline const struct dma_map_ops *get_dma_ops(struct device *dev)
{
- 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);
+ return NULL;
}
-
-static inline void
-dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
- int nelems, enum dma_data_direction dir)
+static inline void set_dma_ops(struct device *dev,
+ const struct dma_map_ops *dma_ops)
{
- 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);
-
}
+#endif /* CONFIG_DMA_OPS */
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,
pgprot_t prot, const void *caller);
void dma_common_free_remap(void *cpu_addr, size_t size);
-void *dma_alloc_from_pool(struct device *dev, size_t size,
- struct page **ret_page, gfp_t flags);
+struct page *dma_alloc_from_pool(struct device *dev, size_t size,
+ void **cpu_addr, gfp_t flags,
+ bool (*phys_addr_ok)(struct device *, phys_addr_t, size_t));
bool dma_free_from_pool(struct device *dev, void *start, size_t size);
int
projects / linux-2.6-microblaze.git / blobdiff