[mirror_ubuntu-artful-kernel.git] / include / asm-generic / dma-mapping-common.h

#ifndef _ASM_GENERIC_DMA_MAPPING_H
#define _ASM_GENERIC_DMA_MAPPING_H

#include <linux/kmemcheck.h>
#include <linux/bug.h>
#include <linux/scatterlist.h>
#include <linux/dma-debug.h>
#include <linux/dma-attrs.h>
#include <asm-generic/dma-coherent.h>

static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
					      size_t size,
					      enum dma_data_direction dir,
					      struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = get_dma_ops(dev);
	dma_addr_t addr;

	kmemcheck_mark_initialized(ptr, size);
	BUG_ON(!valid_dma_direction(dir));
	addr = ops->map_page(dev, virt_to_page(ptr),
			     (unsigned long)ptr & ~PAGE_MASK, size,
			     dir, attrs);
	debug_dma_map_page(dev, virt_to_page(ptr),
			   (unsigned long)ptr & ~PAGE_MASK, size,
			   dir, addr, true);
	return addr;
}

static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,
					  size_t size,
					  enum dma_data_direction dir,
					  struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = get_dma_ops(dev);

	BUG_ON(!valid_dma_direction(dir));
	if (ops->unmap_page)
		ops->unmap_page(dev, addr, size, dir, attrs);
	debug_dma_unmap_page(dev, addr, size, dir, true);
}

/*
 * 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,
				   struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = get_dma_ops(dev);
	int i, ents;
	struct scatterlist *s;

	for_each_sg(sg, s, nents, i)
		kmemcheck_mark_initialized(sg_virt(s), s->length);
	BUG_ON(!valid_dma_direction(dir));
	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,
				      struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = get_dma_ops(dev);

	BUG_ON(!valid_dma_direction(dir));
	debug_dma_unmap_sg(dev, sg, nents, dir);
	if (ops->unmap_sg)
		ops->unmap_sg(dev, sg, nents, dir, attrs);
}

static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
				      size_t offset, size_t size,
				      enum dma_data_direction dir)
{
	struct dma_map_ops *ops = get_dma_ops(dev);
	dma_addr_t addr;

	kmemcheck_mark_initialized(page_address(page) + offset, size);
	BUG_ON(!valid_dma_direction(dir));
	addr = ops->map_page(dev, page, offset, size, dir, NULL);
	debug_dma_map_page(dev, page, offset, size, dir, addr, false);

	return addr;
}

static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
				  size_t size, enum dma_data_direction dir)
{
	struct dma_map_ops *ops = get_dma_ops(dev);

	BUG_ON(!valid_dma_direction(dir));
	if (ops->unmap_page)
		ops->unmap_page(dev, addr, size, dir, NULL);
	debug_dma_unmap_page(dev, addr, size, dir, false);
}

static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
					   size_t size,
					   enum dma_data_direction dir)
{
	struct dma_map_ops *ops = get_dma_ops(dev);

	BUG_ON(!valid_dma_direction(dir));
	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)
{
	struct dma_map_ops *ops = get_dma_ops(dev);

	BUG_ON(!valid_dma_direction(dir));
	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_single_range_for_cpu(struct device *dev,
						 dma_addr_t addr,
						 unsigned long offset,
						 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 (ops->sync_single_for_cpu)
		ops->sync_single_for_cpu(dev, addr + offset, size, dir);
	debug_dma_sync_single_range_for_cpu(dev, addr, offset, size, dir);
}

static inline void dma_sync_single_range_for_device(struct device *dev,
						    dma_addr_t addr,
						    unsigned long offset,
						    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 (ops->sync_single_for_device)
		ops->sync_single_for_device(dev, addr + offset, size, dir);
	debug_dma_sync_single_range_for_device(dev, addr, offset, size, dir);
}

static inline void
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
		    int nelems, enum dma_data_direction dir)
{
	struct dma_map_ops *ops = get_dma_ops(dev);

	BUG_ON(!valid_dma_direction(dir));
	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)
{
	struct dma_map_ops *ops = get_dma_ops(dev);

	BUG_ON(!valid_dma_direction(dir));
	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);

}

#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)

extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
			   void *cpu_addr, dma_addr_t dma_addr, size_t size);

void *dma_common_contiguous_remap(struct page *page, size_t size,
			unsigned long vm_flags,
			pgprot_t prot, const void *caller);

void *dma_common_pages_remap(struct page **pages, size_t size,
			unsigned long vm_flags, pgprot_t prot,
			const void *caller);
void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags);

/**
 * dma_mmap_attrs - map a coherent DMA allocation into user space
 * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
 * @vma: vm_area_struct describing requested user mapping
 * @cpu_addr: kernel CPU-view address returned from dma_alloc_attrs
 * @handle: device-view address returned from dma_alloc_attrs
 * @size: size of memory originally requested in dma_alloc_attrs
 * @attrs: attributes of mapping properties requested in dma_alloc_attrs
 *
 * Map a coherent DMA buffer previously allocated by dma_alloc_attrs
 * into user space.  The coherent DMA buffer must not be freed by the
 * driver until the user space mapping has been released.
 */
static inline int
dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma, void *cpu_addr,
	       dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = get_dma_ops(dev);
	BUG_ON(!ops);
	if (ops->mmap)
		return ops->mmap(dev, vma, cpu_addr, dma_addr, size, attrs);
	return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size);
}

#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, NULL)

int
dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
		       void *cpu_addr, dma_addr_t dma_addr, size_t size);

static inline int
dma_get_sgtable_attrs(struct device *dev, struct sg_table *sgt, void *cpu_addr,
		      dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = get_dma_ops(dev);
	BUG_ON(!ops);
	if (ops->get_sgtable)
		return ops->get_sgtable(dev, sgt, cpu_addr, dma_addr, size,
					attrs);
	return dma_common_get_sgtable(dev, sgt, cpu_addr, dma_addr, size);
}

#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, NULL)

#ifndef arch_dma_alloc_attrs
#define arch_dma_alloc_attrs(dev, flag)	(true)
#endif

static inline void *dma_alloc_attrs(struct device *dev, size_t size,
				       dma_addr_t *dma_handle, gfp_t flag,
				       struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = get_dma_ops(dev);
	void *cpu_addr;

	BUG_ON(!ops);

	if (dma_alloc_from_coherent(dev, size, dma_handle, &cpu_addr))
		return cpu_addr;

	if (!arch_dma_alloc_attrs(&dev, &flag))
		return NULL;
	if (!ops->alloc)
		return NULL;

	cpu_addr = ops->alloc(dev, size, dma_handle, flag, attrs);
	debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
	return cpu_addr;
}

static inline void dma_free_attrs(struct device *dev, size_t size,
				     void *cpu_addr, dma_addr_t dma_handle,
				     struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = get_dma_ops(dev);

	BUG_ON(!ops);
	WARN_ON(irqs_disabled());

	if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
		return;

	if (!ops->free)
		return;

	debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
	ops->free(dev, size, cpu_addr, dma_handle, attrs);
}

static inline void *dma_alloc_coherent(struct device *dev, size_t size,
		dma_addr_t *dma_handle, gfp_t flag)
{
	return dma_alloc_attrs(dev, size, dma_handle, flag, NULL);
}

static inline void dma_free_coherent(struct device *dev, size_t size,
		void *cpu_addr, dma_addr_t dma_handle)
{
	return dma_free_attrs(dev, size, cpu_addr, dma_handle, NULL);
}

static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
		dma_addr_t *dma_handle, gfp_t gfp)
{
	DEFINE_DMA_ATTRS(attrs);

	dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
	return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
}

static inline void dma_free_noncoherent(struct device *dev, size_t size,
		void *cpu_addr, dma_addr_t dma_handle)
{
	DEFINE_DMA_ATTRS(attrs);

	dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
	dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
}

static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
	debug_dma_mapping_error(dev, dma_addr);

	if (get_dma_ops(dev)->mapping_error)
		return get_dma_ops(dev)->mapping_error(dev, dma_addr);

#ifdef DMA_ERROR_CODE
	return dma_addr == DMA_ERROR_CODE;
#else
	return 0;
#endif
}

#ifndef HAVE_ARCH_DMA_SUPPORTED
static inline int dma_supported(struct device *dev, u64 mask)
{
	struct dma_map_ops *ops = get_dma_ops(dev);

	if (!ops)
		return 0;
	if (!ops->dma_supported)
		return 1;
	return ops->dma_supported(dev, mask);
}
#endif

#ifndef HAVE_ARCH_DMA_SET_MASK
static inline int dma_set_mask(struct device *dev, u64 mask)
{
	struct dma_map_ops *ops = get_dma_ops(dev);

	if (ops->set_dma_mask)
		return ops->set_dma_mask(dev, mask);

	if (!dev->dma_mask || !dma_supported(dev, mask))
		return -EIO;
	*dev->dma_mask = mask;
	return 0;
}
#endif

#endif
Commit	Line	Data
c147d8ea FT	1	#ifndef _ASM_GENERIC_DMA_MAPPING_H
	2	#define _ASM_GENERIC_DMA_MAPPING_H
	3
	4	#include <linux/kmemcheck.h>
187f1882	5	#include <linux/bug.h>
c147d8ea FT	6	#include <linux/scatterlist.h>
	7	#include <linux/dma-debug.h>
	8	#include <linux/dma-attrs.h>
6894258e	9	#include <asm-generic/dma-coherent.h>
c147d8ea FT	10
	11	static inline dma_addr_t dma_map_single_attrs(struct device dev, void ptr,
	12	size_t size,
	13	enum dma_data_direction dir,
	14	struct dma_attrs *attrs)
	15	{
	16	struct dma_map_ops *ops = get_dma_ops(dev);
	17	dma_addr_t addr;
	18
	19	kmemcheck_mark_initialized(ptr, size);
	20	BUG_ON(!valid_dma_direction(dir));
	21	addr = ops->map_page(dev, virt_to_page(ptr),
	22	(unsigned long)ptr & ~PAGE_MASK, size,
	23	dir, attrs);
	24	debug_dma_map_page(dev, virt_to_page(ptr),
	25	(unsigned long)ptr & ~PAGE_MASK, size,
	26	dir, addr, true);
	27	return addr;
	28	}
	29
	30	static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,
	31	size_t size,
	32	enum dma_data_direction dir,
	33	struct dma_attrs *attrs)
	34	{
	35	struct dma_map_ops *ops = get_dma_ops(dev);
	36
	37	BUG_ON(!valid_dma_direction(dir));
	38	if (ops->unmap_page)
	39	ops->unmap_page(dev, addr, size, dir, attrs);
	40	debug_dma_unmap_page(dev, addr, size, dir, true);
	41	}
	42
8582e267 RRD	43	/*
	44	* dma_maps_sg_attrs returns 0 on error and > 0 on success.
	45	* It should never return a value < 0.
	46	*/
c147d8ea FT	47	static inline int dma_map_sg_attrs(struct device dev, struct scatterlist sg,
	48	int nents, enum dma_data_direction dir,
	49	struct dma_attrs *attrs)
	50	{
	51	struct dma_map_ops *ops = get_dma_ops(dev);
	52	int i, ents;
	53	struct scatterlist *s;
	54
	55	for_each_sg(sg, s, nents, i)
	56	kmemcheck_mark_initialized(sg_virt(s), s->length);
	57	BUG_ON(!valid_dma_direction(dir));
	58	ents = ops->map_sg(dev, sg, nents, dir, attrs);
8582e267	59	BUG_ON(ents < 0);
c147d8ea FT	60	debug_dma_map_sg(dev, sg, nents, ents, dir);
	61
	62	return ents;
	63	}
	64
	65	static inline void dma_unmap_sg_attrs(struct device dev, struct scatterlist sg,
	66	int nents, enum dma_data_direction dir,
	67	struct dma_attrs *attrs)
	68	{
	69	struct dma_map_ops *ops = get_dma_ops(dev);
	70
	71	BUG_ON(!valid_dma_direction(dir));
	72	debug_dma_unmap_sg(dev, sg, nents, dir);
	73	if (ops->unmap_sg)
	74	ops->unmap_sg(dev, sg, nents, dir, attrs);
	75	}
	76
	77	static inline dma_addr_t dma_map_page(struct device dev, struct page page,
	78	size_t offset, size_t size,
	79	enum dma_data_direction dir)
	80	{
	81	struct dma_map_ops *ops = get_dma_ops(dev);
	82	dma_addr_t addr;
	83
	84	kmemcheck_mark_initialized(page_address(page) + offset, size);
	85	BUG_ON(!valid_dma_direction(dir));
	86	addr = ops->map_page(dev, page, offset, size, dir, NULL);
	87	debug_dma_map_page(dev, page, offset, size, dir, addr, false);
	88
	89	return addr;
	90	}
	91
	92	static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
	93	size_t size, enum dma_data_direction dir)
	94	{
	95	struct dma_map_ops *ops = get_dma_ops(dev);
	96
	97	BUG_ON(!valid_dma_direction(dir));
	98	if (ops->unmap_page)
	99	ops->unmap_page(dev, addr, size, dir, NULL);
	100	debug_dma_unmap_page(dev, addr, size, dir, false);
	101	}
	102
	103	static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
	104	size_t size,
	105	enum dma_data_direction dir)
	106	{
	107	struct dma_map_ops *ops = get_dma_ops(dev);
	108
	109	BUG_ON(!valid_dma_direction(dir));
	110	if (ops->sync_single_for_cpu)
	111	ops->sync_single_for_cpu(dev, addr, size, dir);
	112	debug_dma_sync_single_for_cpu(dev, addr, size, dir);
c147d8ea FT	113	}
	114
	115	static inline void dma_sync_single_for_device(struct device *dev,
	116	dma_addr_t addr, size_t size,
	117	enum dma_data_direction dir)
	118	{
	119	struct dma_map_ops *ops = get_dma_ops(dev);
	120
	121	BUG_ON(!valid_dma_direction(dir));
	122	if (ops->sync_single_for_device)
	123	ops->sync_single_for_device(dev, addr, size, dir);
	124	debug_dma_sync_single_for_device(dev, addr, size, dir);
c147d8ea FT	125	}
	126
	127	static inline void dma_sync_single_range_for_cpu(struct device *dev,
	128	dma_addr_t addr,
	129	unsigned long offset,
	130	size_t size,
	131	enum dma_data_direction dir)
	132	{
07a72309 CL	133	const struct dma_map_ops *ops = get_dma_ops(dev);
	134
	135	BUG_ON(!valid_dma_direction(dir));
	136	if (ops->sync_single_for_cpu)
	137	ops->sync_single_for_cpu(dev, addr + offset, size, dir);
	138	debug_dma_sync_single_range_for_cpu(dev, addr, offset, size, dir);
c147d8ea FT	139	}
	140
	141	static inline void dma_sync_single_range_for_device(struct device *dev,
	142	dma_addr_t addr,
	143	unsigned long offset,
	144	size_t size,
	145	enum dma_data_direction dir)
	146	{
07a72309 CL	147	const struct dma_map_ops *ops = get_dma_ops(dev);
	148
	149	BUG_ON(!valid_dma_direction(dir));
	150	if (ops->sync_single_for_device)
	151	ops->sync_single_for_device(dev, addr + offset, size, dir);
	152	debug_dma_sync_single_range_for_device(dev, addr, offset, size, dir);
c147d8ea FT	153	}
	154
	155	static inline void
	156	dma_sync_sg_for_cpu(struct device dev, struct scatterlist sg,
	157	int nelems, enum dma_data_direction dir)
	158	{
	159	struct dma_map_ops *ops = get_dma_ops(dev);
	160
	161	BUG_ON(!valid_dma_direction(dir));
	162	if (ops->sync_sg_for_cpu)
	163	ops->sync_sg_for_cpu(dev, sg, nelems, dir);
	164	debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
c147d8ea FT	165	}
	166
	167	static inline void
	168	dma_sync_sg_for_device(struct device dev, struct scatterlist sg,
	169	int nelems, enum dma_data_direction dir)
	170	{
	171	struct dma_map_ops *ops = get_dma_ops(dev);
	172
	173	BUG_ON(!valid_dma_direction(dir));
	174	if (ops->sync_sg_for_device)
	175	ops->sync_sg_for_device(dev, sg, nelems, dir);
	176	debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
	177
c147d8ea FT	178	}
	179
	180	#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
	181	#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
	182	#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
	183	#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
	184
64ccc9c0 MS	185	extern int dma_common_mmap(struct device dev, struct vm_area_struct vma,
	186	void *cpu_addr, dma_addr_t dma_addr, size_t size);
	187
513510dd LA	188	void dma_common_contiguous_remap(struct page page, size_t size,
	189	unsigned long vm_flags,
	190	pgprot_t prot, const void *caller);
	191
	192	void dma_common_pages_remap(struct page *pages, size_t size,
	193	unsigned long vm_flags, pgprot_t prot,
	194	const void *caller);
	195	void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags);
	196
64ccc9c0 MS	197	/**
	198	* dma_mmap_attrs - map a coherent DMA allocation into user space
	199	* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
	200	* @vma: vm_area_struct describing requested user mapping
	201	* @cpu_addr: kernel CPU-view address returned from dma_alloc_attrs
	202	* @handle: device-view address returned from dma_alloc_attrs
	203	* @size: size of memory originally requested in dma_alloc_attrs
	204	* @attrs: attributes of mapping properties requested in dma_alloc_attrs
	205	*
	206	* Map a coherent DMA buffer previously allocated by dma_alloc_attrs
	207	* into user space. The coherent DMA buffer must not be freed by the
	208	* driver until the user space mapping has been released.
	209	*/
	210	static inline int
	211	dma_mmap_attrs(struct device dev, struct vm_area_struct vma, void *cpu_addr,
	212	dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs)
	213	{
	214	struct dma_map_ops *ops = get_dma_ops(dev);
	215	BUG_ON(!ops);
	216	if (ops->mmap)
	217	return ops->mmap(dev, vma, cpu_addr, dma_addr, size, attrs);
	218	return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size);
	219	}
	220
	221	#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, NULL)
	222
d2b7428e MS	223	int
	224	dma_common_get_sgtable(struct device dev, struct sg_table sgt,
	225	void *cpu_addr, dma_addr_t dma_addr, size_t size);
	226
	227	static inline int
	228	dma_get_sgtable_attrs(struct device dev, struct sg_table sgt, void *cpu_addr,
	229	dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs)
	230	{
	231	struct dma_map_ops *ops = get_dma_ops(dev);
	232	BUG_ON(!ops);
	233	if (ops->get_sgtable)
	234	return ops->get_sgtable(dev, sgt, cpu_addr, dma_addr, size,
	235	attrs);
	236	return dma_common_get_sgtable(dev, sgt, cpu_addr, dma_addr, size);
	237	}
	238
	239	#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, NULL)
	240
6894258e CH	241	#ifndef arch_dma_alloc_attrs
	242	#define arch_dma_alloc_attrs(dev, flag) (true)
	243	#endif
	244
	245	static inline void dma_alloc_attrs(struct device dev, size_t size,
	246	dma_addr_t *dma_handle, gfp_t flag,
	247	struct dma_attrs *attrs)
	248	{
	249	struct dma_map_ops *ops = get_dma_ops(dev);
	250	void *cpu_addr;
	251
	252	BUG_ON(!ops);
	253
	254	if (dma_alloc_from_coherent(dev, size, dma_handle, &cpu_addr))
	255	return cpu_addr;
	256
	257	if (!arch_dma_alloc_attrs(&dev, &flag))
	258	return NULL;
	259	if (!ops->alloc)
	260	return NULL;
	261
	262	cpu_addr = ops->alloc(dev, size, dma_handle, flag, attrs);
	263	debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
	264	return cpu_addr;
	265	}
	266
	267	static inline void dma_free_attrs(struct device *dev, size_t size,
	268	void *cpu_addr, dma_addr_t dma_handle,
	269	struct dma_attrs *attrs)
	270	{
	271	struct dma_map_ops *ops = get_dma_ops(dev);
	272
	273	BUG_ON(!ops);
	274	WARN_ON(irqs_disabled());
	275
	276	if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
	277	return;
	278
	279	if (!ops->free)
	280	return;
	281
	282	debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
	283	ops->free(dev, size, cpu_addr, dma_handle, attrs);
	284	}
	285
	286	static inline void dma_alloc_coherent(struct device dev, size_t size,
	287	dma_addr_t *dma_handle, gfp_t flag)
	288	{
	289	return dma_alloc_attrs(dev, size, dma_handle, flag, NULL);
	290	}
	291
	292	static inline void dma_free_coherent(struct device *dev, size_t size,
	293	void *cpu_addr, dma_addr_t dma_handle)
	294	{
	295	return dma_free_attrs(dev, size, cpu_addr, dma_handle, NULL);
	296	}
	297
1e893752 CH	298	static inline void dma_alloc_noncoherent(struct device dev, size_t size,
	299	dma_addr_t *dma_handle, gfp_t gfp)
	300	{
	301	DEFINE_DMA_ATTRS(attrs);
	302
	303	dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
	304	return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
	305	}
	306
	307	static inline void dma_free_noncoherent(struct device *dev, size_t size,
	308	void *cpu_addr, dma_addr_t dma_handle)
	309	{
	310	DEFINE_DMA_ATTRS(attrs);
	311
	312	dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
	313	dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
	314	}
	315
efa21e43 CH	316	static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
	317	{
	318	debug_dma_mapping_error(dev, dma_addr);
	319
	320	if (get_dma_ops(dev)->mapping_error)
	321	return get_dma_ops(dev)->mapping_error(dev, dma_addr);
	322
	323	#ifdef DMA_ERROR_CODE
	324	return dma_addr == DMA_ERROR_CODE;
	325	#else
	326	return 0;
	327	#endif
	328	}
	329
ee196371 CH	330	#ifndef HAVE_ARCH_DMA_SUPPORTED
	331	static inline int dma_supported(struct device *dev, u64 mask)
	332	{
	333	struct dma_map_ops *ops = get_dma_ops(dev);
	334
	335	if (!ops)
	336	return 0;
	337	if (!ops->dma_supported)
	338	return 1;
	339	return ops->dma_supported(dev, mask);
	340	}
	341	#endif
	342
452e06af CH	343	#ifndef HAVE_ARCH_DMA_SET_MASK
	344	static inline int dma_set_mask(struct device *dev, u64 mask)
	345	{
	346	struct dma_map_ops *ops = get_dma_ops(dev);
	347
	348	if (ops->set_dma_mask)
	349	return ops->set_dma_mask(dev, mask);
	350
	351	if (!dev->dma_mask \|\| !dma_supported(dev, mask))
	352	return -EIO;
	353	*dev->dma_mask = mask;
	354	return 0;
	355	}
	356	#endif
	357
c147d8ea	358	#endif