mirror of
https://github.com/torvalds/linux.git
synced 2024-12-11 13:41:55 +00:00
b6e05477c1
Give the basic phys_to_dma() and dma_to_phys() helpers a __-prefix and add the memory encryption mask to the non-prefixed versions. Use the __-prefixed versions directly instead of clearing the mask again in various places. Tested-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Joerg Roedel <joro@8bytes.org> Cc: Jon Mason <jdmason@kudzu.us> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Muli Ben-Yehuda <mulix@mulix.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: iommu@lists.linux-foundation.org Link: http://lkml.kernel.org/r/20180319103826.12853-13-hch@lst.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
37 lines
806 B
C
37 lines
806 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef ASM_ARM_DMA_DIRECT_H
|
|
#define ASM_ARM_DMA_DIRECT_H 1
|
|
|
|
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;
|
|
}
|
|
|
|
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
|
|
{
|
|
u64 limit, mask;
|
|
|
|
if (!dev->dma_mask)
|
|
return 0;
|
|
|
|
mask = *dev->dma_mask;
|
|
|
|
limit = (mask + 1) & ~mask;
|
|
if (limit && size > limit)
|
|
return 0;
|
|
|
|
if ((addr | (addr + size - 1)) & ~mask)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
#endif /* ASM_ARM_DMA_DIRECT_H */
|