summaryrefslogtreecommitdiff
path: root/bsd/drm_vm.h
blob: e4ae8c7e647aecf72edf8c37531c8325ab8f0c93 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
/* 
 * Copyright 2003 Eric Anholt
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
static int DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, vm_paddr_t *paddr, 
    int prot)
#elif defined(__FreeBSD__)
static int DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, int prot)
#elif defined(__NetBSD__)
static paddr_t DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, int prot)
#endif
{
	DRM_DEVICE;
	drm_device_dma_t *dma = dev->dma;
	unsigned long physical;
	unsigned long page;

	if (dma == NULL || dma->pagelist == NULL)
		return -1;

	page	 = offset >> PAGE_SHIFT;
	physical = dma->pagelist[page];

	DRM_DEBUG("0x%08lx (page %lu) => 0x%08lx\n", (long)offset, page, physical);
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
	*paddr = physical;
	return 0;
#else
	return atop(physical);
#endif
}

#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
int DRM(mmap)(dev_t kdev, vm_offset_t offset, vm_paddr_t *paddr, 
    int prot)
#elif defined(__FreeBSD__)
int DRM(mmap)(dev_t kdev, vm_offset_t offset, int prot)
#elif defined(__NetBSD__)
paddr_t DRM(mmap)(dev_t kdev, off_t offset, int prot)
#endif
{
	DRM_DEVICE;
	drm_local_map_t *map = NULL;
	drm_map_list_entry_t *listentry = NULL;
	drm_file_t *priv;

	DRM_GET_PRIV_WITH_RETURN(priv, (DRMFILE)DRM_CURRENTPID);

	if (!priv->authenticated)
		return DRM_ERR(EACCES);

	if (dev->dma
	    && offset >= 0
	    && offset < ptoa(dev->dma->page_count))
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
		return DRM(dma_mmap)(kdev, offset, paddr, prot);
#else
		return DRM(dma_mmap)(kdev, offset, prot);
#endif

				/* A sequential search of a linked list is
				   fine here because: 1) there will only be
				   about 5-10 entries in the list and, 2) a
				   DRI client only has to do this mapping
				   once, so it doesn't have to be optimized
				   for performance, even if the list was a
				   bit longer. */
	TAILQ_FOREACH(listentry, dev->maplist, link) {
		map = listentry->map;
/*		DRM_DEBUG("considering 0x%x..0x%x\n", map->offset, map->offset + map->size - 1);*/
		if (offset >= map->offset
		    && offset < map->offset + map->size) break;
	}
	
	if (!listentry) {
		DRM_DEBUG("can't find map\n");
		return -1;
	}
	if (((map->flags&_DRM_RESTRICTED) && DRM_SUSER(DRM_CURPROC))) {
		DRM_DEBUG("restricted map\n");
		return -1;
	}

	switch (map->type) {
	case _DRM_FRAME_BUFFER:
	case _DRM_REGISTERS:
	case _DRM_AGP:
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
		*paddr = offset;
		return 0;
#else
		return atop(offset);
#endif
	case _DRM_SCATTER_GATHER:
	case _DRM_SHM:
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
		*paddr = vtophys(offset);
		return 0;
#else
		return atop(vtophys(offset));
#endif
	default:
		return -1;	/* This should never happen. */
	}
	DRM_DEBUG("bailing out\n");
	
	return -1;
}