81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
/* 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 */
|