mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-17 08:06:57 +07:00
1a9777a8a0
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Robin Murphy <robin.murphy@arm.com>
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_DMA_DIRECT_H
|
|
#define _LINUX_DMA_DIRECT_H 1
|
|
|
|
#include <linux/dma-mapping.h>
|
|
|
|
#ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA
|
|
#include <asm/dma-direct.h>
|
|
#else
|
|
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
|
|
{
|
|
dma_addr_t dev_addr = (dma_addr_t)paddr;
|
|
|
|
return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
|
|
}
|
|
|
|
static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
|
|
{
|
|
phys_addr_t paddr = (phys_addr_t)dev_addr;
|
|
|
|
return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
|
|
}
|
|
|
|
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
|
|
{
|
|
if (!dev->dma_mask)
|
|
return false;
|
|
|
|
return addr + size - 1 <= *dev->dma_mask;
|
|
}
|
|
#endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
|
|
|
|
#ifdef CONFIG_ARCH_HAS_DMA_MARK_CLEAN
|
|
void dma_mark_clean(void *addr, size_t size);
|
|
#else
|
|
static inline void dma_mark_clean(void *addr, size_t size)
|
|
{
|
|
}
|
|
#endif /* CONFIG_ARCH_HAS_DMA_MARK_CLEAN */
|
|
|
|
void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
|
|
gfp_t gfp, unsigned long attrs);
|
|
void dma_direct_free(struct device *dev, size_t size, void *cpu_addr,
|
|
dma_addr_t dma_addr, unsigned long attrs);
|
|
int dma_direct_supported(struct device *dev, u64 mask);
|
|
|
|
#endif /* _LINUX_DMA_DIRECT_H */
|