1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_DMA_MAPPING_H
3 #define _LINUX_DMA_MAPPING_H
5 #include <linux/sizes.h>
6 #include <linux/string.h>
7 #include <linux/device.h>
9 #include <linux/dma-debug.h>
10 #include <linux/dma-direction.h>
11 #include <linux/scatterlist.h>
12 #include <linux/bug.h>
13 #include <linux/mem_encrypt.h>
16 * List of possible attributes associated with a DMA mapping. The semantics
17 * of each attribute should be defined in Documentation/DMA-attributes.txt.
19 * DMA_ATTR_WRITE_BARRIER: DMA to a memory region with this attribute
20 * forces all pending DMA writes to complete.
22 #define DMA_ATTR_WRITE_BARRIER (1UL << 0)
24 * DMA_ATTR_WEAK_ORDERING: Specifies that reads and writes to the mapping
25 * may be weakly ordered, that is that reads and writes may pass each other.
27 #define DMA_ATTR_WEAK_ORDERING (1UL << 1)
29 * DMA_ATTR_WRITE_COMBINE: Specifies that writes to the mapping may be
30 * buffered to improve performance.
32 #define DMA_ATTR_WRITE_COMBINE (1UL << 2)
34 * DMA_ATTR_NON_CONSISTENT: Lets the platform to choose to return either
35 * consistent or non-consistent memory as it sees fit.
37 #define DMA_ATTR_NON_CONSISTENT (1UL << 3)
39 * DMA_ATTR_NO_KERNEL_MAPPING: Lets the platform to avoid creating a kernel
40 * virtual mapping for the allocated buffer.
42 #define DMA_ATTR_NO_KERNEL_MAPPING (1UL << 4)
44 * DMA_ATTR_SKIP_CPU_SYNC: Allows platform code to skip synchronization of
45 * the CPU cache for the given buffer assuming that it has been already
46 * transferred to 'device' domain.
48 #define DMA_ATTR_SKIP_CPU_SYNC (1UL << 5)
50 * DMA_ATTR_FORCE_CONTIGUOUS: Forces contiguous allocation of the buffer
53 #define DMA_ATTR_FORCE_CONTIGUOUS (1UL << 6)
55 * DMA_ATTR_ALLOC_SINGLE_PAGES: This is a hint to the DMA-mapping subsystem
56 * that it's probably not worth the time to try to allocate memory to in a way
57 * that gives better TLB efficiency.
59 #define DMA_ATTR_ALLOC_SINGLE_PAGES (1UL << 7)
61 * DMA_ATTR_NO_WARN: This tells the DMA-mapping subsystem to suppress
62 * allocation failure reports (similarly to __GFP_NOWARN).
64 #define DMA_ATTR_NO_WARN (1UL << 8)
67 * DMA_ATTR_PRIVILEGED: used to indicate that the buffer is fully
68 * accessible at an elevated privilege level (and ideally inaccessible or
69 * at least read-only at lesser-privileged levels).
71 #define DMA_ATTR_PRIVILEGED (1UL << 9)
74 * A dma_addr_t can hold any valid DMA or bus address for the platform.
75 * It can be given to a device to use as a DMA source or target. A CPU cannot
76 * reference a dma_addr_t directly because there may be translation between
77 * its physical address space and the bus address space.
80 void* (*alloc
)(struct device
*dev
, size_t size
,
81 dma_addr_t
*dma_handle
, gfp_t gfp
,
83 void (*free
)(struct device
*dev
, size_t size
,
84 void *vaddr
, dma_addr_t dma_handle
,
86 int (*mmap
)(struct device
*, struct vm_area_struct
*,
87 void *, dma_addr_t
, size_t,
90 int (*get_sgtable
)(struct device
*dev
, struct sg_table
*sgt
, void *,
91 dma_addr_t
, size_t, unsigned long attrs
);
93 dma_addr_t (*map_page
)(struct device
*dev
, struct page
*page
,
94 unsigned long offset
, size_t size
,
95 enum dma_data_direction dir
,
97 void (*unmap_page
)(struct device
*dev
, dma_addr_t dma_handle
,
98 size_t size
, enum dma_data_direction dir
,
101 * map_sg returns 0 on error and a value > 0 on success.
102 * It should never return a value < 0.
104 int (*map_sg
)(struct device
*dev
, struct scatterlist
*sg
,
105 int nents
, enum dma_data_direction dir
,
106 unsigned long attrs
);
107 void (*unmap_sg
)(struct device
*dev
,
108 struct scatterlist
*sg
, int nents
,
109 enum dma_data_direction dir
,
110 unsigned long attrs
);
111 dma_addr_t (*map_resource
)(struct device
*dev
, phys_addr_t phys_addr
,
112 size_t size
, enum dma_data_direction dir
,
113 unsigned long attrs
);
114 void (*unmap_resource
)(struct device
*dev
, dma_addr_t dma_handle
,
115 size_t size
, enum dma_data_direction dir
,
116 unsigned long attrs
);
117 void (*sync_single_for_cpu
)(struct device
*dev
,
118 dma_addr_t dma_handle
, size_t size
,
119 enum dma_data_direction dir
);
120 void (*sync_single_for_device
)(struct device
*dev
,
121 dma_addr_t dma_handle
, size_t size
,
122 enum dma_data_direction dir
);
123 void (*sync_sg_for_cpu
)(struct device
*dev
,
124 struct scatterlist
*sg
, int nents
,
125 enum dma_data_direction dir
);
126 void (*sync_sg_for_device
)(struct device
*dev
,
127 struct scatterlist
*sg
, int nents
,
128 enum dma_data_direction dir
);
129 void (*cache_sync
)(struct device
*dev
, void *vaddr
, size_t size
,
130 enum dma_data_direction direction
);
131 int (*dma_supported
)(struct device
*dev
, u64 mask
);
132 u64 (*get_required_mask
)(struct device
*dev
);
133 size_t (*max_mapping_size
)(struct device
*dev
);
136 #define DMA_MAPPING_ERROR (~(dma_addr_t)0)
138 extern const struct dma_map_ops dma_virt_ops
;
139 extern const struct dma_map_ops dma_dummy_ops
;
141 #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
143 #define DMA_MASK_NONE 0x0ULL
145 static inline int valid_dma_direction(int dma_direction
)
147 return ((dma_direction
== DMA_BIDIRECTIONAL
) ||
148 (dma_direction
== DMA_TO_DEVICE
) ||
149 (dma_direction
== DMA_FROM_DEVICE
));
152 static inline int is_device_dma_capable(struct device
*dev
)
154 return dev
->dma_mask
!= NULL
&& *dev
->dma_mask
!= DMA_MASK_NONE
;
157 #ifdef CONFIG_DMA_DECLARE_COHERENT
159 * These three functions are only for dma allocator.
160 * Don't use them in device drivers.
162 int dma_alloc_from_dev_coherent(struct device
*dev
, ssize_t size
,
163 dma_addr_t
*dma_handle
, void **ret
);
164 int dma_release_from_dev_coherent(struct device
*dev
, int order
, void *vaddr
);
166 int dma_mmap_from_dev_coherent(struct device
*dev
, struct vm_area_struct
*vma
,
167 void *cpu_addr
, size_t size
, int *ret
);
169 void *dma_alloc_from_global_coherent(ssize_t size
, dma_addr_t
*dma_handle
);
170 int dma_release_from_global_coherent(int order
, void *vaddr
);
171 int dma_mmap_from_global_coherent(struct vm_area_struct
*vma
, void *cpu_addr
,
172 size_t size
, int *ret
);
175 #define dma_alloc_from_dev_coherent(dev, size, handle, ret) (0)
176 #define dma_release_from_dev_coherent(dev, order, vaddr) (0)
177 #define dma_mmap_from_dev_coherent(dev, vma, vaddr, order, ret) (0)
179 static inline void *dma_alloc_from_global_coherent(ssize_t size
,
180 dma_addr_t
*dma_handle
)
185 static inline int dma_release_from_global_coherent(int order
, void *vaddr
)
190 static inline int dma_mmap_from_global_coherent(struct vm_area_struct
*vma
,
191 void *cpu_addr
, size_t size
,
196 #endif /* CONFIG_DMA_DECLARE_COHERENT */
198 static inline bool dma_is_direct(const struct dma_map_ops
*ops
)
204 * All the dma_direct_* declarations are here just for the indirect call bypass,
205 * and must not be used directly drivers!
207 dma_addr_t
dma_direct_map_page(struct device
*dev
, struct page
*page
,
208 unsigned long offset
, size_t size
, enum dma_data_direction dir
,
209 unsigned long attrs
);
210 int dma_direct_map_sg(struct device
*dev
, struct scatterlist
*sgl
, int nents
,
211 enum dma_data_direction dir
, unsigned long attrs
);
212 dma_addr_t
dma_direct_map_resource(struct device
*dev
, phys_addr_t paddr
,
213 size_t size
, enum dma_data_direction dir
, unsigned long attrs
);
215 #if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
216 defined(CONFIG_SWIOTLB)
217 void dma_direct_sync_single_for_device(struct device
*dev
,
218 dma_addr_t addr
, size_t size
, enum dma_data_direction dir
);
219 void dma_direct_sync_sg_for_device(struct device
*dev
,
220 struct scatterlist
*sgl
, int nents
, enum dma_data_direction dir
);
222 static inline void dma_direct_sync_single_for_device(struct device
*dev
,
223 dma_addr_t addr
, size_t size
, enum dma_data_direction dir
)
226 static inline void dma_direct_sync_sg_for_device(struct device
*dev
,
227 struct scatterlist
*sgl
, int nents
, enum dma_data_direction dir
)
232 #if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
233 defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) || \
234 defined(CONFIG_SWIOTLB)
235 void dma_direct_unmap_page(struct device
*dev
, dma_addr_t addr
,
236 size_t size
, enum dma_data_direction dir
, unsigned long attrs
);
237 void dma_direct_unmap_sg(struct device
*dev
, struct scatterlist
*sgl
,
238 int nents
, enum dma_data_direction dir
, unsigned long attrs
);
239 void dma_direct_sync_single_for_cpu(struct device
*dev
,
240 dma_addr_t addr
, size_t size
, enum dma_data_direction dir
);
241 void dma_direct_sync_sg_for_cpu(struct device
*dev
,
242 struct scatterlist
*sgl
, int nents
, enum dma_data_direction dir
);
244 static inline void dma_direct_unmap_page(struct device
*dev
, dma_addr_t addr
,
245 size_t size
, enum dma_data_direction dir
, unsigned long attrs
)
248 static inline void dma_direct_unmap_sg(struct device
*dev
,
249 struct scatterlist
*sgl
, int nents
, enum dma_data_direction dir
,
253 static inline void dma_direct_sync_single_for_cpu(struct device
*dev
,
254 dma_addr_t addr
, size_t size
, enum dma_data_direction dir
)
257 static inline void dma_direct_sync_sg_for_cpu(struct device
*dev
,
258 struct scatterlist
*sgl
, int nents
, enum dma_data_direction dir
)
263 size_t dma_direct_max_mapping_size(struct device
*dev
);
265 #ifdef CONFIG_HAS_DMA
266 #include <asm/dma-mapping.h>
268 static inline const struct dma_map_ops
*get_dma_ops(struct device
*dev
)
272 return get_arch_dma_ops(dev
->bus
);
275 static inline void set_dma_ops(struct device
*dev
,
276 const struct dma_map_ops
*dma_ops
)
278 dev
->dma_ops
= dma_ops
;
281 static inline dma_addr_t
dma_map_page_attrs(struct device
*dev
,
282 struct page
*page
, size_t offset
, size_t size
,
283 enum dma_data_direction dir
, unsigned long attrs
)
285 const struct dma_map_ops
*ops
= get_dma_ops(dev
);
288 BUG_ON(!valid_dma_direction(dir
));
289 if (dma_is_direct(ops
))
290 addr
= dma_direct_map_page(dev
, page
, offset
, size
, dir
, attrs
);
292 addr
= ops
->map_page(dev
, page
, offset
, size
, dir
, attrs
);
293 debug_dma_map_page(dev
, page
, offset
, size
, dir
, addr
);
298 static inline void dma_unmap_page_attrs(struct device
*dev
, dma_addr_t addr
,
299 size_t size
, enum dma_data_direction dir
, unsigned long attrs
)
301 const struct dma_map_ops
*ops
= get_dma_ops(dev
);
303 BUG_ON(!valid_dma_direction(dir
));
304 if (dma_is_direct(ops
))
305 dma_direct_unmap_page(dev
, addr
, size
, dir
, attrs
);
306 else if (ops
->unmap_page
)
307 ops
->unmap_page(dev
, addr
, size
, dir
, attrs
);
308 debug_dma_unmap_page(dev
, addr
, size
, dir
);
312 * dma_maps_sg_attrs returns 0 on error and > 0 on success.
313 * It should never return a value < 0.
315 static inline int dma_map_sg_attrs(struct device
*dev
, struct scatterlist
*sg
,
316 int nents
, enum dma_data_direction dir
,
319 const struct dma_map_ops
*ops
= get_dma_ops(dev
);
322 BUG_ON(!valid_dma_direction(dir
));
323 if (dma_is_direct(ops
))
324 ents
= dma_direct_map_sg(dev
, sg
, nents
, dir
, attrs
);
326 ents
= ops
->map_sg(dev
, sg
, nents
, dir
, attrs
);
328 debug_dma_map_sg(dev
, sg
, nents
, ents
, dir
);
333 static inline void dma_unmap_sg_attrs(struct device
*dev
, struct scatterlist
*sg
,
334 int nents
, enum dma_data_direction dir
,
337 const struct dma_map_ops
*ops
= get_dma_ops(dev
);
339 BUG_ON(!valid_dma_direction(dir
));
340 debug_dma_unmap_sg(dev
, sg
, nents
, dir
);
341 if (dma_is_direct(ops
))
342 dma_direct_unmap_sg(dev
, sg
, nents
, dir
, attrs
);
343 else if (ops
->unmap_sg
)
344 ops
->unmap_sg(dev
, sg
, nents
, dir
, attrs
);
347 static inline dma_addr_t
dma_map_resource(struct device
*dev
,
348 phys_addr_t phys_addr
,
350 enum dma_data_direction dir
,
353 const struct dma_map_ops
*ops
= get_dma_ops(dev
);
354 dma_addr_t addr
= DMA_MAPPING_ERROR
;
356 BUG_ON(!valid_dma_direction(dir
));
358 /* Don't allow RAM to be mapped */
359 if (WARN_ON_ONCE(pfn_valid(PHYS_PFN(phys_addr
))))
360 return DMA_MAPPING_ERROR
;
362 if (dma_is_direct(ops
))
363 addr
= dma_direct_map_resource(dev
, phys_addr
, size
, dir
, attrs
);
364 else if (ops
->map_resource
)
365 addr
= ops
->map_resource(dev
, phys_addr
, size
, dir
, attrs
);
367 debug_dma_map_resource(dev
, phys_addr
, size
, dir
, addr
);
371 static inline void dma_unmap_resource(struct device
*dev
, dma_addr_t addr
,
372 size_t size
, enum dma_data_direction dir
,
375 const struct dma_map_ops
*ops
= get_dma_ops(dev
);
377 BUG_ON(!valid_dma_direction(dir
));
378 if (!dma_is_direct(ops
) && ops
->unmap_resource
)
379 ops
->unmap_resource(dev
, addr
, size
, dir
, attrs
);
380 debug_dma_unmap_resource(dev
, addr
, size
, dir
);
383 static inline void dma_sync_single_for_cpu(struct device
*dev
, dma_addr_t addr
,
385 enum dma_data_direction dir
)
387 const struct dma_map_ops
*ops
= get_dma_ops(dev
);
389 BUG_ON(!valid_dma_direction(dir
));
390 if (dma_is_direct(ops
))
391 dma_direct_sync_single_for_cpu(dev
, addr
, size
, dir
);
392 else if (ops
->sync_single_for_cpu
)
393 ops
->sync_single_for_cpu(dev
, addr
, size
, dir
);
394 debug_dma_sync_single_for_cpu(dev
, addr
, size
, dir
);
397 static inline void dma_sync_single_for_device(struct device
*dev
,
398 dma_addr_t addr
, size_t size
,
399 enum dma_data_direction dir
)
401 const struct dma_map_ops
*ops
= get_dma_ops(dev
);
403 BUG_ON(!valid_dma_direction(dir
));
404 if (dma_is_direct(ops
))
405 dma_direct_sync_single_for_device(dev
, addr
, size
, dir
);
406 else if (ops
->sync_single_for_device
)
407 ops
->sync_single_for_device(dev
, addr
, size
, dir
);
408 debug_dma_sync_single_for_device(dev
, addr
, size
, dir
);
412 dma_sync_sg_for_cpu(struct device
*dev
, struct scatterlist
*sg
,
413 int nelems
, enum dma_data_direction dir
)
415 const struct dma_map_ops
*ops
= get_dma_ops(dev
);
417 BUG_ON(!valid_dma_direction(dir
));
418 if (dma_is_direct(ops
))
419 dma_direct_sync_sg_for_cpu(dev
, sg
, nelems
, dir
);
420 else if (ops
->sync_sg_for_cpu
)
421 ops
->sync_sg_for_cpu(dev
, sg
, nelems
, dir
);
422 debug_dma_sync_sg_for_cpu(dev
, sg
, nelems
, dir
);
426 dma_sync_sg_for_device(struct device
*dev
, struct scatterlist
*sg
,
427 int nelems
, enum dma_data_direction dir
)
429 const struct dma_map_ops
*ops
= get_dma_ops(dev
);
431 BUG_ON(!valid_dma_direction(dir
));
432 if (dma_is_direct(ops
))
433 dma_direct_sync_sg_for_device(dev
, sg
, nelems
, dir
);
434 else if (ops
->sync_sg_for_device
)
435 ops
->sync_sg_for_device(dev
, sg
, nelems
, dir
);
436 debug_dma_sync_sg_for_device(dev
, sg
, nelems
, dir
);
440 static inline int dma_mapping_error(struct device
*dev
, dma_addr_t dma_addr
)
442 debug_dma_mapping_error(dev
, dma_addr
);
444 if (dma_addr
== DMA_MAPPING_ERROR
)
449 void *dma_alloc_attrs(struct device
*dev
, size_t size
, dma_addr_t
*dma_handle
,
450 gfp_t flag
, unsigned long attrs
);
451 void dma_free_attrs(struct device
*dev
, size_t size
, void *cpu_addr
,
452 dma_addr_t dma_handle
, unsigned long attrs
);
453 void *dmam_alloc_attrs(struct device
*dev
, size_t size
, dma_addr_t
*dma_handle
,
454 gfp_t gfp
, unsigned long attrs
);
455 void dmam_free_coherent(struct device
*dev
, size_t size
, void *vaddr
,
456 dma_addr_t dma_handle
);
457 void dma_cache_sync(struct device
*dev
, void *vaddr
, size_t size
,
458 enum dma_data_direction dir
);
459 int dma_get_sgtable_attrs(struct device
*dev
, struct sg_table
*sgt
,
460 void *cpu_addr
, dma_addr_t dma_addr
, size_t size
,
461 unsigned long attrs
);
462 int dma_mmap_attrs(struct device
*dev
, struct vm_area_struct
*vma
,
463 void *cpu_addr
, dma_addr_t dma_addr
, size_t size
,
464 unsigned long attrs
);
465 int dma_supported(struct device
*dev
, u64 mask
);
466 int dma_set_mask(struct device
*dev
, u64 mask
);
467 int dma_set_coherent_mask(struct device
*dev
, u64 mask
);
468 u64
dma_get_required_mask(struct device
*dev
);
469 size_t dma_max_mapping_size(struct device
*dev
);
470 #else /* CONFIG_HAS_DMA */
471 static inline dma_addr_t
dma_map_page_attrs(struct device
*dev
,
472 struct page
*page
, size_t offset
, size_t size
,
473 enum dma_data_direction dir
, unsigned long attrs
)
475 return DMA_MAPPING_ERROR
;
477 static inline void dma_unmap_page_attrs(struct device
*dev
, dma_addr_t addr
,
478 size_t size
, enum dma_data_direction dir
, unsigned long attrs
)
481 static inline int dma_map_sg_attrs(struct device
*dev
, struct scatterlist
*sg
,
482 int nents
, enum dma_data_direction dir
, unsigned long attrs
)
486 static inline void dma_unmap_sg_attrs(struct device
*dev
,
487 struct scatterlist
*sg
, int nents
, enum dma_data_direction dir
,
491 static inline dma_addr_t
dma_map_resource(struct device
*dev
,
492 phys_addr_t phys_addr
, size_t size
, enum dma_data_direction dir
,
495 return DMA_MAPPING_ERROR
;
497 static inline void dma_unmap_resource(struct device
*dev
, dma_addr_t addr
,
498 size_t size
, enum dma_data_direction dir
, unsigned long attrs
)
501 static inline void dma_sync_single_for_cpu(struct device
*dev
, dma_addr_t addr
,
502 size_t size
, enum dma_data_direction dir
)
505 static inline void dma_sync_single_for_device(struct device
*dev
,
506 dma_addr_t addr
, size_t size
, enum dma_data_direction dir
)
509 static inline void dma_sync_sg_for_cpu(struct device
*dev
,
510 struct scatterlist
*sg
, int nelems
, enum dma_data_direction dir
)
513 static inline void dma_sync_sg_for_device(struct device
*dev
,
514 struct scatterlist
*sg
, int nelems
, enum dma_data_direction dir
)
517 static inline int dma_mapping_error(struct device
*dev
, dma_addr_t dma_addr
)
521 static inline void *dma_alloc_attrs(struct device
*dev
, size_t size
,
522 dma_addr_t
*dma_handle
, gfp_t flag
, unsigned long attrs
)
526 static void dma_free_attrs(struct device
*dev
, size_t size
, void *cpu_addr
,
527 dma_addr_t dma_handle
, unsigned long attrs
)
530 static inline void *dmam_alloc_attrs(struct device
*dev
, size_t size
,
531 dma_addr_t
*dma_handle
, gfp_t gfp
, unsigned long attrs
)
535 static inline void dmam_free_coherent(struct device
*dev
, size_t size
,
536 void *vaddr
, dma_addr_t dma_handle
)
539 static inline void dma_cache_sync(struct device
*dev
, void *vaddr
, size_t size
,
540 enum dma_data_direction dir
)
543 static inline int dma_get_sgtable_attrs(struct device
*dev
,
544 struct sg_table
*sgt
, void *cpu_addr
, dma_addr_t dma_addr
,
545 size_t size
, unsigned long attrs
)
549 static inline int dma_mmap_attrs(struct device
*dev
, struct vm_area_struct
*vma
,
550 void *cpu_addr
, dma_addr_t dma_addr
, size_t size
,
555 static inline int dma_supported(struct device
*dev
, u64 mask
)
559 static inline int dma_set_mask(struct device
*dev
, u64 mask
)
563 static inline int dma_set_coherent_mask(struct device
*dev
, u64 mask
)
567 static inline u64
dma_get_required_mask(struct device
*dev
)
571 static inline size_t dma_max_mapping_size(struct device
*dev
)
575 #endif /* CONFIG_HAS_DMA */
577 static inline dma_addr_t
dma_map_single_attrs(struct device
*dev
, void *ptr
,
578 size_t size
, enum dma_data_direction dir
, unsigned long attrs
)
580 debug_dma_map_single(dev
, ptr
, size
);
581 return dma_map_page_attrs(dev
, virt_to_page(ptr
), offset_in_page(ptr
),
585 static inline void dma_unmap_single_attrs(struct device
*dev
, dma_addr_t addr
,
586 size_t size
, enum dma_data_direction dir
, unsigned long attrs
)
588 return dma_unmap_page_attrs(dev
, addr
, size
, dir
, attrs
);
591 static inline void dma_sync_single_range_for_cpu(struct device
*dev
,
592 dma_addr_t addr
, unsigned long offset
, size_t size
,
593 enum dma_data_direction dir
)
595 return dma_sync_single_for_cpu(dev
, addr
+ offset
, size
, dir
);
598 static inline void dma_sync_single_range_for_device(struct device
*dev
,
599 dma_addr_t addr
, unsigned long offset
, size_t size
,
600 enum dma_data_direction dir
)
602 return dma_sync_single_for_device(dev
, addr
+ offset
, size
, dir
);
605 #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, 0)
606 #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, 0)
607 #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
608 #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, 0)
609 #define dma_map_page(d, p, o, s, r) dma_map_page_attrs(d, p, o, s, r, 0)
610 #define dma_unmap_page(d, a, s, r) dma_unmap_page_attrs(d, a, s, r, 0)
611 #define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, 0)
612 #define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, 0)
614 extern int dma_common_mmap(struct device
*dev
, struct vm_area_struct
*vma
,
615 void *cpu_addr
, dma_addr_t dma_addr
, size_t size
,
616 unsigned long attrs
);
618 void *dma_common_contiguous_remap(struct page
*page
, size_t size
,
619 unsigned long vm_flags
,
620 pgprot_t prot
, const void *caller
);
622 void *dma_common_pages_remap(struct page
**pages
, size_t size
,
623 unsigned long vm_flags
, pgprot_t prot
,
625 void dma_common_free_remap(void *cpu_addr
, size_t size
, unsigned long vm_flags
);
627 int __init
dma_atomic_pool_init(gfp_t gfp
, pgprot_t prot
);
628 bool dma_in_atomic_pool(void *start
, size_t size
);
629 void *dma_alloc_from_pool(size_t size
, struct page
**ret_page
, gfp_t flags
);
630 bool dma_free_from_pool(void *start
, size_t size
);
633 dma_common_get_sgtable(struct device
*dev
, struct sg_table
*sgt
, void *cpu_addr
,
634 dma_addr_t dma_addr
, size_t size
, unsigned long attrs
);
636 static inline void *dma_alloc_coherent(struct device
*dev
, size_t size
,
637 dma_addr_t
*dma_handle
, gfp_t gfp
)
640 return dma_alloc_attrs(dev
, size
, dma_handle
, gfp
,
641 (gfp
& __GFP_NOWARN
) ? DMA_ATTR_NO_WARN
: 0);
644 static inline void dma_free_coherent(struct device
*dev
, size_t size
,
645 void *cpu_addr
, dma_addr_t dma_handle
)
647 return dma_free_attrs(dev
, size
, cpu_addr
, dma_handle
, 0);
651 static inline u64
dma_get_mask(struct device
*dev
)
653 if (dev
->dma_mask
&& *dev
->dma_mask
)
654 return *dev
->dma_mask
;
655 return DMA_BIT_MASK(32);
659 * Set both the DMA mask and the coherent DMA mask to the same thing.
660 * Note that we don't check the return value from dma_set_coherent_mask()
661 * as the DMA API guarantees that the coherent DMA mask can be set to
662 * the same or smaller than the streaming DMA mask.
664 static inline int dma_set_mask_and_coherent(struct device
*dev
, u64 mask
)
666 int rc
= dma_set_mask(dev
, mask
);
668 dma_set_coherent_mask(dev
, mask
);
673 * Similar to the above, except it deals with the case where the device
674 * does not have dev->dma_mask appropriately setup.
676 static inline int dma_coerce_mask_and_coherent(struct device
*dev
, u64 mask
)
678 dev
->dma_mask
= &dev
->coherent_dma_mask
;
679 return dma_set_mask_and_coherent(dev
, mask
);
683 * dma_addressing_limited - return if the device is addressing limited
684 * @dev: device to check
686 * Return %true if the devices DMA mask is too small to address all memory in
687 * the system, else %false. Lack of addressing bits is the prime reason for
688 * bounce buffering, but might not be the only one.
690 static inline bool dma_addressing_limited(struct device
*dev
)
692 return min_not_zero(dma_get_mask(dev
), dev
->bus_dma_mask
) <
693 dma_get_required_mask(dev
);
696 #ifdef CONFIG_ARCH_HAS_SETUP_DMA_OPS
697 void arch_setup_dma_ops(struct device
*dev
, u64 dma_base
, u64 size
,
698 const struct iommu_ops
*iommu
, bool coherent
);
700 static inline void arch_setup_dma_ops(struct device
*dev
, u64 dma_base
,
701 u64 size
, const struct iommu_ops
*iommu
, bool coherent
)
704 #endif /* CONFIG_ARCH_HAS_SETUP_DMA_OPS */
706 #ifdef CONFIG_ARCH_HAS_TEARDOWN_DMA_OPS
707 void arch_teardown_dma_ops(struct device
*dev
);
709 static inline void arch_teardown_dma_ops(struct device
*dev
)
712 #endif /* CONFIG_ARCH_HAS_TEARDOWN_DMA_OPS */
714 static inline unsigned int dma_get_max_seg_size(struct device
*dev
)
716 if (dev
->dma_parms
&& dev
->dma_parms
->max_segment_size
)
717 return dev
->dma_parms
->max_segment_size
;
721 static inline int dma_set_max_seg_size(struct device
*dev
, unsigned int size
)
723 if (dev
->dma_parms
) {
724 dev
->dma_parms
->max_segment_size
= size
;
730 static inline unsigned long dma_get_seg_boundary(struct device
*dev
)
732 if (dev
->dma_parms
&& dev
->dma_parms
->segment_boundary_mask
)
733 return dev
->dma_parms
->segment_boundary_mask
;
734 return DMA_BIT_MASK(32);
737 static inline int dma_set_seg_boundary(struct device
*dev
, unsigned long mask
)
739 if (dev
->dma_parms
) {
740 dev
->dma_parms
->segment_boundary_mask
= mask
;
746 static inline int dma_get_cache_alignment(void)
748 #ifdef ARCH_DMA_MINALIGN
749 return ARCH_DMA_MINALIGN
;
754 #ifdef CONFIG_DMA_DECLARE_COHERENT
755 int dma_declare_coherent_memory(struct device
*dev
, phys_addr_t phys_addr
,
756 dma_addr_t device_addr
, size_t size
);
757 void dma_release_declared_memory(struct device
*dev
);
760 dma_declare_coherent_memory(struct device
*dev
, phys_addr_t phys_addr
,
761 dma_addr_t device_addr
, size_t size
)
767 dma_release_declared_memory(struct device
*dev
)
770 #endif /* CONFIG_DMA_DECLARE_COHERENT */
772 static inline void *dmam_alloc_coherent(struct device
*dev
, size_t size
,
773 dma_addr_t
*dma_handle
, gfp_t gfp
)
775 return dmam_alloc_attrs(dev
, size
, dma_handle
, gfp
,
776 (gfp
& __GFP_NOWARN
) ? DMA_ATTR_NO_WARN
: 0);
779 static inline void *dma_alloc_wc(struct device
*dev
, size_t size
,
780 dma_addr_t
*dma_addr
, gfp_t gfp
)
782 unsigned long attrs
= DMA_ATTR_WRITE_COMBINE
;
784 if (gfp
& __GFP_NOWARN
)
785 attrs
|= DMA_ATTR_NO_WARN
;
787 return dma_alloc_attrs(dev
, size
, dma_addr
, gfp
, attrs
);
789 #ifndef dma_alloc_writecombine
790 #define dma_alloc_writecombine dma_alloc_wc
793 static inline void dma_free_wc(struct device
*dev
, size_t size
,
794 void *cpu_addr
, dma_addr_t dma_addr
)
796 return dma_free_attrs(dev
, size
, cpu_addr
, dma_addr
,
797 DMA_ATTR_WRITE_COMBINE
);
799 #ifndef dma_free_writecombine
800 #define dma_free_writecombine dma_free_wc
803 static inline int dma_mmap_wc(struct device
*dev
,
804 struct vm_area_struct
*vma
,
805 void *cpu_addr
, dma_addr_t dma_addr
,
808 return dma_mmap_attrs(dev
, vma
, cpu_addr
, dma_addr
, size
,
809 DMA_ATTR_WRITE_COMBINE
);
811 #ifndef dma_mmap_writecombine
812 #define dma_mmap_writecombine dma_mmap_wc
815 #ifdef CONFIG_NEED_DMA_MAP_STATE
816 #define DEFINE_DMA_UNMAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME
817 #define DEFINE_DMA_UNMAP_LEN(LEN_NAME) __u32 LEN_NAME
818 #define dma_unmap_addr(PTR, ADDR_NAME) ((PTR)->ADDR_NAME)
819 #define dma_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL))
820 #define dma_unmap_len(PTR, LEN_NAME) ((PTR)->LEN_NAME)
821 #define dma_unmap_len_set(PTR, LEN_NAME, VAL) (((PTR)->LEN_NAME) = (VAL))
823 #define DEFINE_DMA_UNMAP_ADDR(ADDR_NAME)
824 #define DEFINE_DMA_UNMAP_LEN(LEN_NAME)
825 #define dma_unmap_addr(PTR, ADDR_NAME) (0)
826 #define dma_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
827 #define dma_unmap_len(PTR, LEN_NAME) (0)
828 #define dma_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)