1 /*
2 * Copyright © 2007 Red Hat, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors:
24 * Dave Airlie <airlied@redhat.com>
25 *
26 */
27
28 #ifdef HAVE_DIX_CONFIG_H
29 #include "dix-config.h"
30 #endif
31
32 #include "dumb_bo.h"
33
34 #include <errno.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #include <sys/ioctl.h>
38 #include <sys/mman.h>
39 #include <unistd.h>
40 #include <xf86drm.h>
41
42 struct dumb_bo *
dumb_bo_create(int fd,const unsigned width,const unsigned height,const unsigned bpp)43 dumb_bo_create(int fd,
44 const unsigned width, const unsigned height, const unsigned bpp)
45 {
46 struct drm_mode_create_dumb arg;
47 struct dumb_bo *bo;
48 int ret;
49
50 bo = calloc(1, sizeof(*bo));
51 if (!bo)
52 return NULL;
53
54 memset(&arg, 0, sizeof(arg));
55 arg.width = width;
56 arg.height = height;
57 arg.bpp = bpp;
58
59 ret = drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &arg);
60 if (ret)
61 goto err_free;
62
63 bo->handle = arg.handle;
64 bo->size = arg.size;
65 bo->pitch = arg.pitch;
66
67 return bo;
68 err_free:
69 free(bo);
70 return NULL;
71 }
72
73 int
dumb_bo_map(int fd,struct dumb_bo * bo)74 dumb_bo_map(int fd, struct dumb_bo *bo)
75 {
76 struct drm_mode_map_dumb arg;
77 int ret;
78 void *map;
79
80 if (bo->ptr) {
81 return 0;
82 }
83
84 memset(&arg, 0, sizeof(arg));
85 arg.handle = bo->handle;
86
87 ret = drmIoctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &arg);
88 if (ret)
89 return ret;
90
91 map = mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, arg.offset);
92 if (map == MAP_FAILED)
93 return -errno;
94
95 bo->ptr = map;
96 return 0;
97 }
98
99 int
dumb_bo_destroy(int fd,struct dumb_bo * bo)100 dumb_bo_destroy(int fd, struct dumb_bo *bo)
101 {
102 struct drm_mode_destroy_dumb arg;
103 int ret;
104
105 if (bo->ptr) {
106 munmap(bo->ptr, bo->size);
107 bo->ptr = NULL;
108 }
109
110 memset(&arg, 0, sizeof(arg));
111 arg.handle = bo->handle;
112 ret = drmIoctl(fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg);
113 if (ret)
114 return -errno;
115
116 free(bo);
117 return 0;
118 }
119
120 struct dumb_bo *
dumb_get_bo_from_fd(int fd,int handle,int pitch,int size)121 dumb_get_bo_from_fd(int fd, int handle, int pitch, int size)
122 {
123 struct dumb_bo *bo;
124 int ret;
125
126 bo = calloc(1, sizeof(*bo));
127 if (!bo)
128 return NULL;
129
130 ret = drmPrimeFDToHandle(fd, handle, &bo->handle);
131 if (ret) {
132 free(bo);
133 return NULL;
134 }
135 bo->pitch = pitch;
136 bo->size = size;
137 return bo;
138 }
139