5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef ASM_ARM_DMA_DIRECT_H
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#define ASM_ARM_DMA_DIRECT_H 1
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#include <asm/memory.h>
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/*
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* dma_to_pfn/pfn_to_dma/virt_to_dma are architecture private
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* functions used internally by the DMA-mapping API to provide DMA
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* addresses. They must not be used by drivers.
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*/
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static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn)
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{
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if (dev && dev->dma_range_map)
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pfn = PFN_DOWN(translate_phys_to_dma(dev, PFN_PHYS(pfn)));
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return (dma_addr_t)__pfn_to_bus(pfn);
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}
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static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr)
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{
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unsigned long pfn = __bus_to_pfn(addr);
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if (dev && dev->dma_range_map)
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pfn = PFN_DOWN(translate_dma_to_phys(dev, PFN_PHYS(pfn)));
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return pfn;
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}
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static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
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{
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if (dev)
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return pfn_to_dma(dev, virt_to_pfn(addr));
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return (dma_addr_t)__virt_to_bus((unsigned long)(addr));
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}
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static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
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{
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unsigned int offset = paddr & ~PAGE_MASK;
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return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset;
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}
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static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
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{
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unsigned int offset = dev_addr & ~PAGE_MASK;
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return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset;
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}
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#endif /* ASM_ARM_DMA_DIRECT_H */
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