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11#ifndef _VDUSE_IOVA_DOMAIN_H
12#define _VDUSE_IOVA_DOMAIN_H
13
14#include <linux/iova.h>
15#include <linux/dma-mapping.h>
16#include <linux/vhost_iotlb.h>
17
18#define IOVA_START_PFN 1
19
20#define INVALID_PHYS_ADDR (~(phys_addr_t)0)
21
22struct vduse_bounce_map {
23 struct page *bounce_page;
24 u64 orig_phys;
25};
26
27struct vduse_iova_domain {
28 struct iova_domain stream_iovad;
29 struct iova_domain consistent_iovad;
30 struct vduse_bounce_map *bounce_maps;
31 size_t bounce_size;
32 unsigned long iova_limit;
33 int bounce_map;
34 struct vhost_iotlb *iotlb;
35 spinlock_t iotlb_lock;
36 struct file *file;
37};
38
39int vduse_domain_set_map(struct vduse_iova_domain *domain,
40 struct vhost_iotlb *iotlb);
41
42void vduse_domain_clear_map(struct vduse_iova_domain *domain,
43 struct vhost_iotlb *iotlb);
44
45dma_addr_t vduse_domain_map_page(struct vduse_iova_domain *domain,
46 struct page *page, unsigned long offset,
47 size_t size, enum dma_data_direction dir,
48 unsigned long attrs);
49
50void vduse_domain_unmap_page(struct vduse_iova_domain *domain,
51 dma_addr_t dma_addr, size_t size,
52 enum dma_data_direction dir, unsigned long attrs);
53
54void *vduse_domain_alloc_coherent(struct vduse_iova_domain *domain,
55 size_t size, dma_addr_t *dma_addr,
56 gfp_t flag, unsigned long attrs);
57
58void vduse_domain_free_coherent(struct vduse_iova_domain *domain, size_t size,
59 void *vaddr, dma_addr_t dma_addr,
60 unsigned long attrs);
61
62void vduse_domain_reset_bounce_map(struct vduse_iova_domain *domain);
63
64void vduse_domain_destroy(struct vduse_iova_domain *domain);
65
66struct vduse_iova_domain *vduse_domain_create(unsigned long iova_limit,
67 size_t bounce_size);
68
69int vduse_domain_init(void);
70
71void vduse_domain_exit(void);
72
73#endif
74