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_get_fd(int fd,struct dumb_bo * bo,uint32_t flags)100 dumb_bo_get_fd(int fd, struct dumb_bo *bo, uint32_t flags)
101 {
102 struct drm_prime_handle args;
103 int ret;
104
105 memset(&args, 0, sizeof(args));
106 args.fd = -1;
107 args.handle = bo->handle;
108 args.flags = flags;
109
110 ret = drmIoctl(fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
111 if (ret)
112 return ret;
113
114 return args.fd;
115 }
116
117 /* From glamor_get_flink_name() */
118 int
dumb_bo_get_name(int fd,struct dumb_bo * bo)119 dumb_bo_get_name(int fd, struct dumb_bo *bo)
120 {
121 struct drm_gem_flink flink;
122
123 flink.handle = bo->handle;
124 if (ioctl(fd, DRM_IOCTL_GEM_FLINK, &flink) < 0) {
125 /*
126 * Assume non-GEM kernels have names identical to the handle
127 */
128 if (errno == ENODEV)
129 return bo->handle;
130
131 return -1;
132 }
133 return flink.name;
134 }
135
136 int
dumb_bo_destroy(int fd,struct dumb_bo * bo)137 dumb_bo_destroy(int fd, struct dumb_bo *bo)
138 {
139 struct drm_mode_destroy_dumb arg;
140 int ret;
141
142 if (bo->ptr) {
143 munmap(bo->ptr, bo->size);
144 bo->ptr = NULL;
145 }
146
147 memset(&arg, 0, sizeof(arg));
148 arg.handle = bo->handle;
149 ret = drmIoctl(fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg);
150 if (ret)
151 return -errno;
152
153 free(bo);
154 return 0;
155 }
156
157 struct dumb_bo *
dumb_get_bo_from_handle(int fd,int handle,int pitch,int size)158 dumb_get_bo_from_handle(int fd, int handle, int pitch, int size)
159 {
160 struct dumb_bo *bo;
161
162 bo = calloc(1, sizeof(*bo));
163 if (!bo)
164 return NULL;
165
166 bo->handle = handle;
167 bo->pitch = pitch;
168 bo->size = size;
169 return bo;
170 }
171
172 struct dumb_bo *
dumb_get_bo_from_fd(int fd,int dmafd,int pitch,int size)173 dumb_get_bo_from_fd(int fd, int dmafd, int pitch, int size)
174 {
175 unsigned int handle;
176 int ret;
177
178 ret = drmPrimeFDToHandle(fd, dmafd, &handle);
179 if (ret)
180 return NULL;
181
182 return dumb_get_bo_from_handle(fd, handle, pitch, size);
183 }
184