cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dma-direct.h (1341B)

      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 */