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Tip revision: 569dbb88e80deb68974ef6fdd6a13edb9d686261 authored by Linus Torvalds on 03 September 2017, 20:56:17 UTC
Linux 4.13
Linux 4.13
Tip revision: 569dbb8
dma-mapping.h
#ifndef _ASM_IA64_DMA_MAPPING_H
#define _ASM_IA64_DMA_MAPPING_H
/*
* Copyright (C) 2003-2004 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*/
#include <asm/machvec.h>
#include <linux/scatterlist.h>
#include <asm/swiotlb.h>
#include <linux/dma-debug.h>
#define ARCH_HAS_DMA_GET_REQUIRED_MASK
extern const struct dma_map_ops *dma_ops;
extern struct ia64_machine_vector ia64_mv;
extern void set_iommu_machvec(void);
extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
enum dma_data_direction);
extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
enum dma_data_direction);
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
return platform_dma_get_ops(NULL);
}
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
if (!dev->dma_mask)
return 0;
return addr + size - 1 <= *dev->dma_mask;
}
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
return paddr;
}
static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
{
return daddr;
}
static inline void
dma_cache_sync (struct device *dev, void *vaddr, size_t size,
enum dma_data_direction dir)
{
/*
* IA-64 is cache-coherent, so this is mostly a no-op. However, we do need to
* ensure that dma_cache_sync() enforces order, hence the mb().
*/
mb();
}
#endif /* _ASM_IA64_DMA_MAPPING_H */