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
|
/* drm_scatter.h -- IOCTLs to manage scatter/gather memory -*- linux-c -*-
* Created: Mon Dec 18 23:20:54 2000 by gareth@valinux.com */
/*-
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* 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.
*
* Authors:
* Gareth Hughes <gareth@valinux.com>
* Eric Anholt <anholt@FreeBSD.org>
*
*/
#include "drmP.h"
#define DEBUG_SCATTER 0
void drm_sg_cleanup(drm_sg_mem_t *entry)
{
free(entry->virtual, M_DRM);
free(entry->busaddr, M_DRM);
free(entry, M_DRM);
}
int drm_sg_alloc(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_scatter_gather_t request;
drm_sg_mem_t *entry;
unsigned long pages;
DRM_DEBUG( "%s\n", __FUNCTION__ );
if ( dev->sg )
return EINVAL;
DRM_COPY_FROM_USER_IOCTL(request, (drm_scatter_gather_t *)data,
sizeof(request) );
entry = malloc(sizeof(*entry), M_DRM, M_WAITOK | M_ZERO);
if ( !entry )
return ENOMEM;
pages = round_page(request.size) / PAGE_SIZE;
DRM_DEBUG( "sg size=%ld pages=%ld\n", request.size, pages );
entry->pages = pages;
entry->busaddr = malloc(pages * sizeof(*entry->busaddr), M_DRM,
M_WAITOK | M_ZERO);
if ( !entry->busaddr ) {
drm_sg_cleanup(entry);
return ENOMEM;
}
entry->virtual = malloc(pages << PAGE_SHIFT, M_DRM, M_WAITOK | M_ZERO);
if ( !entry->virtual ) {
drm_sg_cleanup(entry);
return ENOMEM;
}
entry->handle = (unsigned long)entry->virtual;
DRM_DEBUG( "sg alloc handle = %08lx\n", entry->handle );
DRM_DEBUG( "sg alloc virtual = %p\n", entry->virtual );
request.handle = entry->handle;
DRM_COPY_TO_USER_IOCTL( (drm_scatter_gather_t *)data,
request,
sizeof(request) );
DRM_LOCK();
if (dev->sg) {
DRM_UNLOCK();
drm_sg_cleanup(entry);
return EINVAL;
}
dev->sg = entry;
DRM_UNLOCK();
return 0;
}
int drm_sg_free(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_scatter_gather_t request;
drm_sg_mem_t *entry;
DRM_COPY_FROM_USER_IOCTL( request, (drm_scatter_gather_t *)data,
sizeof(request) );
DRM_LOCK();
entry = dev->sg;
dev->sg = NULL;
DRM_UNLOCK();
if ( !entry || entry->handle != request.handle )
return EINVAL;
DRM_DEBUG( "sg free virtual = %p\n", entry->virtual );
drm_sg_cleanup(entry);
return 0;
}
|
