1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef ASM_ARM_DMA_DIRECT_H
 3#define ASM_ARM_DMA_DIRECT_H 1
 4
 5static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
 6{
 7	unsigned int offset = paddr & ~PAGE_MASK;
 8	return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset;
 9}
10
11static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr)
 
 
 
 
 
12{
13	unsigned int offset = dev_addr & ~PAGE_MASK;
14	return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset;
 
15}
16
17static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
18{
19	u64 limit, mask;
20
21	if (!dev->dma_mask)
22		return 0;
 
 
23
24	mask = *dev->dma_mask;
 
 
 
25
26	limit = (mask + 1) & ~mask;
27	if (limit && size > limit)
28		return 0;
29
30	if ((addr | (addr + size - 1)) & ~mask)
31		return 0;
 
 
 
32
33	return 1;
 
 
 
34}
35
36#endif /* ASM_ARM_DMA_DIRECT_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef ASM_ARM_DMA_DIRECT_H
 3#define ASM_ARM_DMA_DIRECT_H 1
 4
 5#include <asm/memory.h>
 
 
 
 
 6
 7/*
 8 * dma_to_pfn/pfn_to_dma/virt_to_dma are architecture private
 9 * functions used internally by the DMA-mapping API to provide DMA
10 * addresses. They must not be used by drivers.
11 */
12static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn)
13{
14	if (dev && dev->dma_range_map)
15		pfn = PFN_DOWN(translate_phys_to_dma(dev, PFN_PHYS(pfn)));
16	return (dma_addr_t)__pfn_to_bus(pfn);
17}
18
19static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr)
20{
21	unsigned long pfn = __bus_to_pfn(addr);
22
23	if (dev && dev->dma_range_map)
24		pfn = PFN_DOWN(translate_dma_to_phys(dev, PFN_PHYS(pfn)));
25	return pfn;
26}
27
28static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
29{
30	if (dev)
31		return pfn_to_dma(dev, virt_to_pfn(addr));
32
33	return (dma_addr_t)__virt_to_bus((unsigned long)(addr));
34}
 
35
36static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
37{
38	unsigned int offset = paddr & ~PAGE_MASK;
39	return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset;
40}
41
42static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
43{
44	unsigned int offset = dev_addr & ~PAGE_MASK;
45	return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset;
46}
47
48#endif /* ASM_ARM_DMA_DIRECT_H */