mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-12-28 16:56:26 +00:00
3d09ff4546
The direct calls from mapping.c all guarded by use_dma_iommu(), so don't bother to provide stubs, but instead just expose the prototypes unconditionally. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Leon Romanovsky <leon@kernel.org>
70 lines
3.0 KiB
C
70 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (c) 2024, NVIDIA CORPORATION & AFFILIATES. All rights reserved
|
|
*
|
|
* DMA operations that map physical memory through IOMMU.
|
|
*/
|
|
#ifndef _LINUX_IOMMU_DMA_H
|
|
#define _LINUX_IOMMU_DMA_H
|
|
|
|
#include <linux/dma-direction.h>
|
|
|
|
#ifdef CONFIG_IOMMU_DMA
|
|
static inline bool use_dma_iommu(struct device *dev)
|
|
{
|
|
return dev->dma_iommu;
|
|
}
|
|
#else
|
|
static inline bool use_dma_iommu(struct device *dev)
|
|
{
|
|
return false;
|
|
}
|
|
#endif /* CONFIG_IOMMU_DMA */
|
|
|
|
dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page,
|
|
unsigned long offset, size_t size, enum dma_data_direction dir,
|
|
unsigned long attrs);
|
|
void iommu_dma_unmap_page(struct device *dev, dma_addr_t dma_handle,
|
|
size_t size, enum dma_data_direction dir, unsigned long attrs);
|
|
int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
|
|
enum dma_data_direction dir, unsigned long attrs);
|
|
void iommu_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
|
|
enum dma_data_direction dir, unsigned long attrs);
|
|
void *iommu_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
|
|
gfp_t gfp, unsigned long attrs);
|
|
int iommu_dma_mmap(struct device *dev, struct vm_area_struct *vma,
|
|
void *cpu_addr, dma_addr_t dma_addr, size_t size,
|
|
unsigned long attrs);
|
|
int iommu_dma_get_sgtable(struct device *dev, struct sg_table *sgt,
|
|
void *cpu_addr, dma_addr_t dma_addr, size_t size,
|
|
unsigned long attrs);
|
|
unsigned long iommu_dma_get_merge_boundary(struct device *dev);
|
|
size_t iommu_dma_opt_mapping_size(void);
|
|
size_t iommu_dma_max_mapping_size(struct device *dev);
|
|
void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr,
|
|
dma_addr_t handle, unsigned long attrs);
|
|
dma_addr_t iommu_dma_map_resource(struct device *dev, phys_addr_t phys,
|
|
size_t size, enum dma_data_direction dir, unsigned long attrs);
|
|
void iommu_dma_unmap_resource(struct device *dev, dma_addr_t handle,
|
|
size_t size, enum dma_data_direction dir, unsigned long attrs);
|
|
struct sg_table *iommu_dma_alloc_noncontiguous(struct device *dev, size_t size,
|
|
enum dma_data_direction dir, gfp_t gfp, unsigned long attrs);
|
|
void iommu_dma_free_noncontiguous(struct device *dev, size_t size,
|
|
struct sg_table *sgt, enum dma_data_direction dir);
|
|
void *iommu_dma_vmap_noncontiguous(struct device *dev, size_t size,
|
|
struct sg_table *sgt);
|
|
#define iommu_dma_vunmap_noncontiguous(dev, vaddr) \
|
|
vunmap(vaddr);
|
|
int iommu_dma_mmap_noncontiguous(struct device *dev, struct vm_area_struct *vma,
|
|
size_t size, struct sg_table *sgt);
|
|
void iommu_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
|
|
size_t size, enum dma_data_direction dir);
|
|
void iommu_dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
|
|
size_t size, enum dma_data_direction dir);
|
|
void iommu_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl,
|
|
int nelems, enum dma_data_direction dir);
|
|
void iommu_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sgl,
|
|
int nelems, enum dma_data_direction dir);
|
|
|
|
#endif /* _LINUX_IOMMU_DMA_H */
|