Файловый менеджер - Редактировать - /usr/src/linux-hwe-5.15-headers-5.15.0-122/arch/arm/include/asm/dma-direct.h
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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef ASM_ARM_DMA_DIRECT_H #define ASM_ARM_DMA_DIRECT_H 1 #include <asm/memory.h> /* * dma_to_pfn/pfn_to_dma/virt_to_dma are architecture private * functions used internally by the DMA-mapping API to provide DMA * addresses. They must not be used by drivers. */ static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn) { if (dev && dev->dma_range_map) pfn = PFN_DOWN(translate_phys_to_dma(dev, PFN_PHYS(pfn))); return (dma_addr_t)__pfn_to_bus(pfn); } static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr) { unsigned long pfn = __bus_to_pfn(addr); if (dev && dev->dma_range_map) pfn = PFN_DOWN(translate_dma_to_phys(dev, PFN_PHYS(pfn))); return pfn; } static inline dma_addr_t virt_to_dma(struct device *dev, void *addr) { if (dev) return pfn_to_dma(dev, virt_to_pfn(addr)); return (dma_addr_t)__virt_to_bus((unsigned long)(addr)); } static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) { unsigned int offset = paddr & ~PAGE_MASK; return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset; } static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) { unsigned int offset = dev_addr & ~PAGE_MASK; return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset; } #endif /* ASM_ARM_DMA_DIRECT_H */
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