linux/drivers/iommu/iommufd/vfio_compat.c

// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES
 */
#include <linux/file.h>
#include <linux/interval_tree.h>
#include <linux/iommu.h>
#include <linux/iommufd.h>
#include <linux/slab.h>
#include <linux/vfio.h>
#include <uapi/linux/vfio.h>
#include <uapi/linux/iommufd.h>

#include "iommufd_private.h"

static struct iommufd_ioas *get_compat_ioas(struct iommufd_ctx *ictx)
{ … }

/**
 * iommufd_vfio_compat_ioas_get_id - Ensure a compat IOAS exists
 * @ictx: Context to operate on
 * @out_ioas_id: The IOAS ID of the compatibility IOAS
 *
 * Return the ID of the current compatibility IOAS. The ID can be passed into
 * other functions that take an ioas_id.
 */
int iommufd_vfio_compat_ioas_get_id(struct iommufd_ctx *ictx, u32 *out_ioas_id)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

/**
 * iommufd_vfio_compat_set_no_iommu - Called when a no-iommu device is attached
 * @ictx: Context to operate on
 *
 * This allows selecting the VFIO_NOIOMMU_IOMMU and blocks normal types.
 */
int iommufd_vfio_compat_set_no_iommu(struct iommufd_ctx *ictx)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

/**
 * iommufd_vfio_compat_ioas_create - Ensure the compat IOAS is created
 * @ictx: Context to operate on
 *
 * The compatibility IOAS is the IOAS that the vfio compatibility ioctls operate
 * on since they do not have an IOAS ID input in their ABI. Only attaching a
 * group should cause a default creation of the internal ioas, this does nothing
 * if an existing ioas has already been assigned somehow.
 */
int iommufd_vfio_compat_ioas_create(struct iommufd_ctx *ictx)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

int iommufd_vfio_ioas(struct iommufd_ucmd *ucmd)
{ … }

static int iommufd_vfio_map_dma(struct iommufd_ctx *ictx, unsigned int cmd,
				void __user *arg)
{ … }

static int iommufd_vfio_unmap_dma(struct iommufd_ctx *ictx, unsigned int cmd,
				  void __user *arg)
{ … }

static int iommufd_vfio_cc_iommu(struct iommufd_ctx *ictx)
{ … }

static int iommufd_vfio_check_extension(struct iommufd_ctx *ictx,
					unsigned long type)
{ … }

static int iommufd_vfio_set_iommu(struct iommufd_ctx *ictx, unsigned long type)
{ … }

static unsigned long iommufd_get_pagesizes(struct iommufd_ioas *ioas)
{ … }

static int iommufd_fill_cap_iova(struct iommufd_ioas *ioas,
				 struct vfio_info_cap_header __user *cur,
				 size_t avail)
{ … }

static int iommufd_fill_cap_dma_avail(struct iommufd_ioas *ioas,
				      struct vfio_info_cap_header __user *cur,
				      size_t avail)
{ … }

static int iommufd_vfio_iommu_get_info(struct iommufd_ctx *ictx,
				       void __user *arg)
{ … }

int iommufd_vfio_ioctl(struct iommufd_ctx *ictx, unsigned int cmd,
		       unsigned long arg)
{ … }