mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 12:45:11 +07:00
356da6d0cd
Avoid expensive indirect calls in the fast path DMA mapping operations by directly calling the dma_direct_* ops if we are using the directly mapped DMA operations. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Tested-by: Jesper Dangaard Brouer <brouer@redhat.com> Tested-by: Tony Luck <tony.luck@intel.com>
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_DMA_NONCOHERENT_H
|
|
#define _LINUX_DMA_NONCOHERENT_H 1
|
|
|
|
#include <linux/dma-mapping.h>
|
|
|
|
#ifdef CONFIG_ARCH_HAS_DMA_COHERENCE_H
|
|
#include <asm/dma-coherence.h>
|
|
#elif defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
|
|
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
|
|
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)
|
|
static inline bool dev_is_dma_coherent(struct device *dev)
|
|
{
|
|
return dev->dma_coherent;
|
|
}
|
|
#else
|
|
static inline bool dev_is_dma_coherent(struct device *dev)
|
|
{
|
|
return true;
|
|
}
|
|
#endif /* CONFIG_ARCH_HAS_DMA_COHERENCE_H */
|
|
|
|
void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
|
|
gfp_t gfp, unsigned long attrs);
|
|
void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,
|
|
dma_addr_t dma_addr, unsigned long attrs);
|
|
long arch_dma_coherent_to_pfn(struct device *dev, void *cpu_addr,
|
|
dma_addr_t dma_addr);
|
|
|
|
#ifdef CONFIG_ARCH_HAS_DMA_MMAP_PGPROT
|
|
pgprot_t arch_dma_mmap_pgprot(struct device *dev, pgprot_t prot,
|
|
unsigned long attrs);
|
|
#else
|
|
# define arch_dma_mmap_pgprot(dev, prot, attrs) pgprot_noncached(prot)
|
|
#endif
|
|
|
|
#ifdef CONFIG_DMA_NONCOHERENT_CACHE_SYNC
|
|
void arch_dma_cache_sync(struct device *dev, void *vaddr, size_t size,
|
|
enum dma_data_direction direction);
|
|
#else
|
|
static inline void arch_dma_cache_sync(struct device *dev, void *vaddr,
|
|
size_t size, enum dma_data_direction direction)
|
|
{
|
|
}
|
|
#endif /* CONFIG_DMA_NONCOHERENT_CACHE_SYNC */
|
|
|
|
#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE
|
|
void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
|
|
size_t size, enum dma_data_direction dir);
|
|
#else
|
|
static inline void arch_sync_dma_for_device(struct device *dev,
|
|
phys_addr_t paddr, size_t size, enum dma_data_direction dir)
|
|
{
|
|
}
|
|
#endif /* ARCH_HAS_SYNC_DMA_FOR_DEVICE */
|
|
|
|
#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU
|
|
void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
|
|
size_t size, enum dma_data_direction dir);
|
|
#else
|
|
static inline void arch_sync_dma_for_cpu(struct device *dev,
|
|
phys_addr_t paddr, size_t size, enum dma_data_direction dir)
|
|
{
|
|
}
|
|
#endif /* ARCH_HAS_SYNC_DMA_FOR_CPU */
|
|
|
|
#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
|
|
void arch_sync_dma_for_cpu_all(struct device *dev);
|
|
#else
|
|
static inline void arch_sync_dma_for_cpu_all(struct device *dev)
|
|
{
|
|
}
|
|
#endif /* CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL */
|
|
|
|
void arch_dma_prep_coherent(struct page *page, size_t size);
|
|
|
|
#endif /* _LINUX_DMA_NONCOHERENT_H */
|