1 /*
2 * Copyright © 2014 NVIDIA Corporation
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
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 #ifdef HAVE_CONFIG_H
25 #include "config.h"
26 #endif
27
28 #include <errno.h>
29 #include <string.h>
30
31 #include <sys/mman.h>
32
33 #include <drm_fourcc.h>
34
35 #include "xf86drm.h"
36
37 #include "libkms-test.h"
38
kms_framebuffer_create(struct kms_device * device,unsigned int width,unsigned int height,uint32_t format)39 struct kms_framebuffer *kms_framebuffer_create(struct kms_device *device,
40 unsigned int width,
41 unsigned int height,
42 uint32_t format)
43 {
44 uint32_t handles[4], pitches[4], offsets[4];
45 struct drm_mode_create_dumb args;
46 struct kms_framebuffer *fb;
47 int err;
48
49 fb = calloc(1, sizeof(*fb));
50 if (!fb)
51 return NULL;
52
53 fb->device = device;
54 fb->width = width;
55 fb->height = height;
56 fb->format = format;
57
58 memset(&args, 0, sizeof(args));
59 args.width = width;
60 args.height = height;
61
62 switch (format) {
63 case DRM_FORMAT_XRGB8888:
64 case DRM_FORMAT_XBGR8888:
65 case DRM_FORMAT_RGBA8888:
66 args.bpp = 32;
67 break;
68
69 default:
70 free(fb);
71 return NULL;
72 }
73
74 err = drmIoctl(device->fd, DRM_IOCTL_MODE_CREATE_DUMB, &args);
75 if (err < 0) {
76 free(fb);
77 return NULL;
78 }
79
80 fb->handle = args.handle;
81 fb->pitch = args.pitch;
82 fb->size = args.size;
83
84 handles[0] = fb->handle;
85 pitches[0] = fb->pitch;
86 offsets[0] = 0;
87
88 err = drmModeAddFB2(device->fd, width, height, format, handles,
89 pitches, offsets, &fb->id, 0);
90 if (err < 0) {
91 kms_framebuffer_free(fb);
92 return NULL;
93 }
94
95 return fb;
96 }
97
kms_framebuffer_free(struct kms_framebuffer * fb)98 void kms_framebuffer_free(struct kms_framebuffer *fb)
99 {
100 struct kms_device *device = fb->device;
101 struct drm_mode_destroy_dumb args;
102 int err;
103
104 if (fb->id) {
105 err = drmModeRmFB(device->fd, fb->id);
106 if (err < 0) {
107 /* not much we can do now */
108 }
109 }
110
111 memset(&args, 0, sizeof(args));
112 args.handle = fb->handle;
113
114 err = drmIoctl(device->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &args);
115 if (err < 0) {
116 /* not much we can do now */
117 }
118
119 free(fb);
120 }
121
kms_framebuffer_map(struct kms_framebuffer * fb,void ** ptrp)122 int kms_framebuffer_map(struct kms_framebuffer *fb, void **ptrp)
123 {
124 struct kms_device *device = fb->device;
125 struct drm_mode_map_dumb args;
126 void *ptr;
127 int err;
128
129 if (fb->ptr) {
130 *ptrp = fb->ptr;
131 return 0;
132 }
133
134 memset(&args, 0, sizeof(args));
135 args.handle = fb->handle;
136
137 err = drmIoctl(device->fd, DRM_IOCTL_MODE_MAP_DUMB, &args);
138 if (err < 0)
139 return -errno;
140
141 ptr = mmap(0, fb->size, PROT_READ | PROT_WRITE, MAP_SHARED,
142 device->fd, args.offset);
143 if (ptr == MAP_FAILED)
144 return -errno;
145
146 *ptrp = fb->ptr = ptr;
147
148 return 0;
149 }
150
kms_framebuffer_unmap(struct kms_framebuffer * fb)151 void kms_framebuffer_unmap(struct kms_framebuffer *fb)
152 {
153 if (fb->ptr) {
154 munmap(fb->ptr, fb->size);
155 fb->ptr = NULL;
156 }
157 }
158