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: ffc253263a1375a65fa6c9f62a893e9767fbebfa authored by Linus Torvalds on 30 October 2023, 02:31:08 UTC
Linux 6.6
Linux 6.6
Tip revision: ffc2532
iova_domain.h
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* MMU-based software IOTLB.
*
* Copyright (C) 2020-2021 Bytedance Inc. and/or its affiliates. All rights reserved.
*
* Author: Xie Yongji <xieyongji@bytedance.com>
*
*/
#ifndef _VDUSE_IOVA_DOMAIN_H
#define _VDUSE_IOVA_DOMAIN_H
#include <linux/iova.h>
#include <linux/dma-mapping.h>
#include <linux/vhost_iotlb.h>
#define IOVA_START_PFN 1
#define INVALID_PHYS_ADDR (~(phys_addr_t)0)
struct vduse_bounce_map {
struct page *bounce_page;
u64 orig_phys;
};
struct vduse_iova_domain {
struct iova_domain stream_iovad;
struct iova_domain consistent_iovad;
struct vduse_bounce_map *bounce_maps;
size_t bounce_size;
unsigned long iova_limit;
int bounce_map;
struct vhost_iotlb *iotlb;
spinlock_t iotlb_lock;
struct file *file;
bool user_bounce_pages;
rwlock_t bounce_lock;
};
int vduse_domain_set_map(struct vduse_iova_domain *domain,
struct vhost_iotlb *iotlb);
void vduse_domain_clear_map(struct vduse_iova_domain *domain,
struct vhost_iotlb *iotlb);
dma_addr_t vduse_domain_map_page(struct vduse_iova_domain *domain,
struct page *page, unsigned long offset,
size_t size, enum dma_data_direction dir,
unsigned long attrs);
void vduse_domain_unmap_page(struct vduse_iova_domain *domain,
dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir, unsigned long attrs);
void *vduse_domain_alloc_coherent(struct vduse_iova_domain *domain,
size_t size, dma_addr_t *dma_addr,
gfp_t flag, unsigned long attrs);
void vduse_domain_free_coherent(struct vduse_iova_domain *domain, size_t size,
void *vaddr, dma_addr_t dma_addr,
unsigned long attrs);
void vduse_domain_reset_bounce_map(struct vduse_iova_domain *domain);
int vduse_domain_add_user_bounce_pages(struct vduse_iova_domain *domain,
struct page **pages, int count);
void vduse_domain_remove_user_bounce_pages(struct vduse_iova_domain *domain);
void vduse_domain_destroy(struct vduse_iova_domain *domain);
struct vduse_iova_domain *vduse_domain_create(unsigned long iova_limit,
size_t bounce_size);
int vduse_domain_init(void);
void vduse_domain_exit(void);
#endif /* _VDUSE_IOVA_DOMAIN_H */