4f869790bd
The dma_info_to_prot() function is needed for drivers that implement their own DMA operation so that the DMA directions and attributes can be translated to IOMMU page flags, so make it a global function. Change-Id: I4d74f193f75801e2d481f3a2ec4044f2da2ae8aa Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2014-2015 ARM Ltd.
|
|
*/
|
|
#ifndef __DMA_IOMMU_H
|
|
#define __DMA_IOMMU_H
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/types.h>
|
|
|
|
#ifdef CONFIG_IOMMU_DMA
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/iommu.h>
|
|
#include <linux/msi.h>
|
|
|
|
struct iova_domain;
|
|
|
|
/* Domain management interface for IOMMU drivers */
|
|
int iommu_get_dma_cookie(struct iommu_domain *domain);
|
|
int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base);
|
|
void iommu_put_dma_cookie(struct iommu_domain *domain);
|
|
|
|
int dma_info_to_prot(enum dma_data_direction dir, bool coherent,
|
|
unsigned long attrs);
|
|
size_t iommu_dma_prepare_map_sg(struct device *dev, struct iova_domain *iovad,
|
|
struct scatterlist *sg, int nents);
|
|
int iommu_dma_finalise_sg(struct device *dev, struct scatterlist *sg,
|
|
int nents, dma_addr_t dma_addr);
|
|
void iommu_dma_invalidate_sg(struct scatterlist *sg, int nents);
|
|
|
|
/* Setup call for arch DMA mapping code */
|
|
void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size);
|
|
|
|
/* The DMA API isn't _quite_ the whole story, though... */
|
|
/*
|
|
* iommu_dma_prepare_msi() - Map the MSI page in the IOMMU device
|
|
*
|
|
* The MSI page will be stored in @desc.
|
|
*
|
|
* Return: 0 on success otherwise an error describing the failure.
|
|
*/
|
|
int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr);
|
|
|
|
/* Update the MSI message if required. */
|
|
void iommu_dma_compose_msi_msg(struct msi_desc *desc,
|
|
struct msi_msg *msg);
|
|
|
|
void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list);
|
|
|
|
#else /* CONFIG_IOMMU_DMA */
|
|
|
|
struct iommu_domain;
|
|
struct msi_desc;
|
|
struct msi_msg;
|
|
struct device;
|
|
|
|
static inline void iommu_setup_dma_ops(struct device *dev, u64 dma_base,
|
|
u64 size)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_get_dma_cookie(struct iommu_domain *domain)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void iommu_put_dma_cookie(struct iommu_domain *domain)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_dma_prepare_msi(struct msi_desc *desc,
|
|
phys_addr_t msi_addr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void iommu_dma_compose_msi_msg(struct msi_desc *desc,
|
|
struct msi_msg *msg)
|
|
{
|
|
}
|
|
|
|
static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_IOMMU_DMA */
|
|
#endif /* __DMA_IOMMU_H */
|