linux/drivers/iommu/iommufd/hw_pagetable.c

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

#include "../iommu-priv.h"
#include "iommufd_private.h"

static void __iommufd_hwpt_destroy(struct iommufd_hw_pagetable *hwpt)
{ … }

void iommufd_hwpt_paging_destroy(struct iommufd_object *obj)
{ … }

void iommufd_hwpt_paging_abort(struct iommufd_object *obj)
{ … }

void iommufd_hwpt_nested_destroy(struct iommufd_object *obj)
{ … }

void iommufd_hwpt_nested_abort(struct iommufd_object *obj)
{ … }

static int
iommufd_hwpt_paging_enforce_cc(struct iommufd_hwpt_paging *hwpt_paging)
{ … }

/**
 * iommufd_hwpt_paging_alloc() - Get a PAGING iommu_domain for a device
 * @ictx: iommufd context
 * @ioas: IOAS to associate the domain with
 * @idev: Device to get an iommu_domain for
 * @flags: Flags from userspace
 * @immediate_attach: True if idev should be attached to the hwpt
 * @user_data: The user provided driver specific data describing the domain to
 *             create
 *
 * Allocate a new iommu_domain and return it as a hw_pagetable. The HWPT
 * will be linked to the given ioas and upon return the underlying iommu_domain
 * is fully popoulated.
 *
 * The caller must hold the ioas->mutex until after
 * iommufd_object_abort_and_destroy() or iommufd_object_finalize() is called on
 * the returned hwpt.
 */
struct iommufd_hwpt_paging *
iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
			  struct iommufd_device *idev, u32 flags,
			  bool immediate_attach,
			  const struct iommu_user_data *user_data)
{ … }

/**
 * iommufd_hwpt_nested_alloc() - Get a NESTED iommu_domain for a device
 * @ictx: iommufd context
 * @parent: Parent PAGING-type hwpt to associate the domain with
 * @idev: Device to get an iommu_domain for
 * @flags: Flags from userspace
 * @user_data: user_data pointer. Must be valid
 *
 * Allocate a new iommu_domain (must be IOMMU_DOMAIN_NESTED) and return it as
 * a NESTED hw_pagetable. The given parent PAGING-type hwpt must be capable of
 * being a parent.
 */
static struct iommufd_hwpt_nested *
iommufd_hwpt_nested_alloc(struct iommufd_ctx *ictx,
			  struct iommufd_hwpt_paging *parent,
			  struct iommufd_device *idev, u32 flags,
			  const struct iommu_user_data *user_data)
{ … }

int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd)
{ … }

int iommufd_hwpt_set_dirty_tracking(struct iommufd_ucmd *ucmd)
{ … }

int iommufd_hwpt_get_dirty_bitmap(struct iommufd_ucmd *ucmd)
{ … }

int iommufd_hwpt_invalidate(struct iommufd_ucmd *ucmd)
{ … }