1 /* SPDX-License-Identifier: GPL-2.0 */
9 #include <linux/dma-mapping.h>
25 	void *(*alloc)(struct device *dev, size_t size,
28 	void (*free)(struct device *dev, size_t size, void *vaddr,
30 	struct page *(*alloc_pages)(struct device *dev, size_t size,
33 	void (*free_pages)(struct device *dev, size_t size, struct page *vaddr,
35 	struct sg_table *(*alloc_noncontiguous)(struct device *dev, size_t size,
38 	void (*free_noncontiguous)(struct device *dev, size_t size,
44 			void *cpu_addr, dma_addr_t dma_addr, size_t size,
47 	dma_addr_t (*map_page)(struct device *dev, struct page *page,
48 			unsigned long offset, size_t size,
51 			size_t size, enum dma_data_direction dir,
63 			size_t size, enum dma_data_direction dir,
66 			size_t size, enum dma_data_direction dir,
69 			size_t size, enum dma_data_direction dir);
71 			dma_addr_t dma_handle, size_t size,
77 	void (*cache_sync)(struct device *dev, void *vaddr, size_t size,
87 #include <asm/dma-mapping.h>
91 	if (dev->dma_ops)  in get_dma_ops()
92 		return dev->dma_ops;  in get_dma_ops()
93 	return get_arch_dma_ops(dev->bus);  in get_dma_ops()
99 	dev->dma_ops = dma_ops;  in set_dma_ops()
117 	if (dev && dev->cma_area)  in dev_get_cma_area()
118 		return dev->cma_area;  in dev_get_cma_area()
123 int __init dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base,
126 struct page *dma_alloc_from_contiguous(struct device *dev, size_t count,
128 bool dma_release_from_contiguous(struct device *dev, struct page *pages,
130 struct page *dma_alloc_contiguous(struct device *dev, size_t size, gfp_t gfp);
131 void dma_free_contiguous(struct device *dev, struct page *page, size_t size);
133 void dma_contiguous_early_fixup(phys_addr_t base, unsigned long size);
142 static inline int dma_contiguous_reserve_area(phys_addr_t size,  in dma_contiguous_reserve_area()  argument
146 	return -ENOSYS;  in dma_contiguous_reserve_area()
148 static inline struct page *dma_alloc_from_contiguous(struct device *dev,  in dma_alloc_from_contiguous()
154 		struct page *pages, int count)  in dma_release_from_contiguous()
159 static inline struct page *dma_alloc_contiguous(struct device *dev, size_t size,  in dma_alloc_contiguous()  argument
164 static inline void dma_free_contiguous(struct device *dev, struct page *page,  in dma_free_contiguous()  argument
165 		size_t size)  in dma_free_contiguous()  argument
167 	__free_pages(page, get_order(size));  in dma_free_contiguous()
179 		dma_addr_t device_addr, size_t size);
181 int dma_alloc_from_dev_coherent(struct device *dev, ssize_t size,
185 		void *cpu_addr, size_t size, int *ret);
188 		phys_addr_t phys_addr, dma_addr_t device_addr, size_t size)  in dma_declare_coherent_memory()  argument
190 	return -ENOSYS;  in dma_declare_coherent_memory()
193 #define dma_alloc_from_dev_coherent(dev, size, handle, ret) (0)  argument
200 void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
204 		size_t size, int *ret);
205 int dma_init_global_coherent(phys_addr_t phys_addr, size_t size);
208 		ssize_t size, dma_addr_t *dma_handle)  in dma_alloc_from_global_coherent()  argument
217 		void *cpu_addr, size_t size, int *ret)  in dma_mmap_from_global_coherent()  argument
224  * This is the actual return value from the ->alloc_noncontiguous method.
226  * the DMA-API internal vmaping and freeing easier we stash away the page
228  * e.g. when a vmap-variant that takes a scatterlist comes along.
232 	struct page **pages;
238 		void *cpu_addr, dma_addr_t dma_addr, size_t size,
241 		void *cpu_addr, dma_addr_t dma_addr, size_t size,
243 struct page *dma_common_alloc_pages(struct device *dev, size_t size,
245 void dma_common_free_pages(struct device *dev, size_t size, struct page *vaddr,
248 struct page **dma_common_find_pages(void *cpu_addr);
249 void *dma_common_contiguous_remap(struct page *page, size_t size, pgprot_t prot,
251 void *dma_common_pages_remap(struct page **pages, size_t size, pgprot_t prot,
253 void dma_common_free_remap(void *cpu_addr, size_t size);
255 struct page *dma_alloc_from_pool(struct device *dev, size_t size,
258 bool dma_free_from_pool(struct device *dev, void *start, size_t size);
261 		dma_addr_t dma_start, u64 size);
269 	return dev->dma_coherent;  in dev_is_dma_coherent()
278 void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
280 void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,
285  * Page protection so that devices that can't snoop CPU caches can use the
299 	return prot;	/* no protection bits supported without page tables */  in dma_pgprot()
304 void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
307 static inline void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,  in arch_sync_dma_for_device()  argument
314 void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
317 static inline void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,  in arch_sync_dma_for_cpu()  argument
332 void arch_dma_prep_coherent(struct page *page, size_t size);
334 static inline void arch_dma_prep_coherent(struct page *page, size_t size)  in arch_dma_prep_coherent()  argument
340 void arch_dma_mark_clean(phys_addr_t paddr, size_t size);
342 static inline void arch_dma_mark_clean(phys_addr_t paddr, size_t size)  in arch_dma_mark_clean()  argument
347 void *arch_dma_set_uncached(void *addr, size_t size);
348 void arch_dma_clear_uncached(void *addr, size_t size);
365 void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
369 		u64 size, const struct iommu_ops *iommu, bool coherent)  in arch_setup_dma_ops()  argument
424 	 * addresses (in the case of dma-direct) or IOVA addresses (in the