https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 1048ba83fb1c00cd24172e23e8263972f6b5d9ac authored by Linus Torvalds on 31 January 2021, 21:50:09 UTC
Linux 5.11-rc6
Linux 5.11-rc6
Tip revision: 1048ba8
dma-iommu.h
/* 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>
/* 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);
/* 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);
void iommu_dma_free_cpu_cached_iovas(unsigned int cpu,
struct iommu_domain *domain);
#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)
{
}
static inline void iommu_dma_free_cpu_cached_iovas(unsigned int cpu,
struct iommu_domain *domain)
{
}
#endif /* CONFIG_IOMMU_DMA */
#endif /* __DMA_IOMMU_H */