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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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31 lines
853 B
C
31 lines
853 B
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef ASM_X86_DMA_DIRECT_H
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#define ASM_X86_DMA_DIRECT_H 1
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#include <linux/mem_encrypt.h>
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#ifdef CONFIG_X86_DMA_REMAP /* Platform code defines bridge-specific code */
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bool dma_capable(struct device *dev, dma_addr_t addr, size_t size);
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dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr);
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phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr);
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#else
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static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
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{
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if (!dev->dma_mask)
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return 0;
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return addr + size - 1 <= *dev->dma_mask;
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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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return __sme_set(paddr);
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}
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static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
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{
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return __sme_clr(daddr);
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}
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#endif /* CONFIG_X86_DMA_REMAP */
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#endif /* ASM_X86_DMA_DIRECT_H */
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