1 /* exynos.c
2 *
3 * Copyright 2009 Samsung Electronics Co., Ltd.
4 * Authors:
5 * SooChan Lim <sc1.lim@samsung.com>
6 * Sangjin LEE <lsj119@samsung.com>
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the next
16 * paragraph) shall be included in all copies or substantial portions of the
17 * Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 * SOFTWARE.
26 */
27
28 #include <errno.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include "internal.h"
33
34 #include <sys/mman.h>
35 #include <sys/ioctl.h>
36 #include "xf86drm.h"
37
38 #include "libdrm_macros.h"
39 #include "exynos_drm.h"
40
41 struct exynos_bo
42 {
43 struct kms_bo base;
44 unsigned map_count;
45 };
46
47 static int
exynos_get_prop(struct kms_driver * kms,unsigned key,unsigned * out)48 exynos_get_prop(struct kms_driver *kms, unsigned key, unsigned *out)
49 {
50 switch (key) {
51 case KMS_BO_TYPE:
52 *out = KMS_BO_TYPE_SCANOUT_X8R8G8B8 | KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8;
53 break;
54 default:
55 return -EINVAL;
56 }
57 return 0;
58 }
59
60 static int
exynos_destroy(struct kms_driver * kms)61 exynos_destroy(struct kms_driver *kms)
62 {
63 free(kms);
64 return 0;
65 }
66
67 static int
exynos_bo_create(struct kms_driver * kms,const unsigned width,const unsigned height,const enum kms_bo_type type,const unsigned * attr,struct kms_bo ** out)68 exynos_bo_create(struct kms_driver *kms,
69 const unsigned width, const unsigned height,
70 const enum kms_bo_type type, const unsigned *attr,
71 struct kms_bo **out)
72 {
73 struct drm_exynos_gem_create arg;
74 unsigned size, pitch;
75 struct exynos_bo *bo;
76 int i, ret;
77
78 for (i = 0; attr[i]; i += 2) {
79 switch (attr[i]) {
80 case KMS_WIDTH:
81 case KMS_HEIGHT:
82 case KMS_BO_TYPE:
83 break;
84 default:
85 return -EINVAL;
86 }
87 }
88
89 bo = calloc(1, sizeof(*bo));
90 if (!bo)
91 return -ENOMEM;
92
93 if (type == KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8) {
94 pitch = 64 * 4;
95 size = 64 * 64 * 4;
96 } else if (type == KMS_BO_TYPE_SCANOUT_X8R8G8B8) {
97 pitch = width * 4;
98 pitch = (pitch + 512 - 1) & ~(512 - 1);
99 size = pitch * ((height + 4 - 1) & ~(4 - 1));
100 } else {
101 ret = -EINVAL;
102 goto err_free;
103 }
104
105 memset(&arg, 0, sizeof(arg));
106 arg.size = size;
107
108 ret = drmCommandWriteRead(kms->fd, DRM_EXYNOS_GEM_CREATE, &arg, sizeof(arg));
109 if (ret)
110 goto err_free;
111
112 bo->base.kms = kms;
113 bo->base.handle = arg.handle;
114 bo->base.size = size;
115 bo->base.pitch = pitch;
116
117 *out = &bo->base;
118
119 return 0;
120
121 err_free:
122 free(bo);
123 return ret;
124 }
125
126 static int
exynos_bo_get_prop(struct kms_bo * bo,unsigned key,unsigned * out)127 exynos_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out)
128 {
129 switch (key) {
130 default:
131 return -EINVAL;
132 }
133 }
134
135 static int
exynos_bo_map(struct kms_bo * _bo,void ** out)136 exynos_bo_map(struct kms_bo *_bo, void **out)
137 {
138 struct exynos_bo *bo = (struct exynos_bo *)_bo;
139 struct drm_mode_map_dumb arg;
140 void *map = NULL;
141 int ret;
142
143 if (bo->base.ptr) {
144 bo->map_count++;
145 *out = bo->base.ptr;
146 return 0;
147 }
148
149 memset(&arg, 0, sizeof(arg));
150 arg.handle = bo->base.handle;
151
152 ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_MODE_MAP_DUMB, &arg);
153 if (ret)
154 return ret;
155
156 map = drm_mmap(0, bo->base.size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->base.kms->fd, arg.offset);
157 if (map == MAP_FAILED)
158 return -errno;
159
160 bo->base.ptr = map;
161 bo->map_count++;
162 *out = bo->base.ptr;
163
164 return 0;
165 }
166
167 static int
exynos_bo_unmap(struct kms_bo * _bo)168 exynos_bo_unmap(struct kms_bo *_bo)
169 {
170 struct exynos_bo *bo = (struct exynos_bo *)_bo;
171 bo->map_count--;
172 return 0;
173 }
174
175 static int
exynos_bo_destroy(struct kms_bo * _bo)176 exynos_bo_destroy(struct kms_bo *_bo)
177 {
178 struct exynos_bo *bo = (struct exynos_bo *)_bo;
179 struct drm_gem_close arg;
180 int ret;
181
182 if (bo->base.ptr) {
183 /* XXX Sanity check map_count */
184 munmap(bo->base.ptr, bo->base.size);
185 bo->base.ptr = NULL;
186 }
187
188 memset(&arg, 0, sizeof(arg));
189 arg.handle = bo->base.handle;
190
191 ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_GEM_CLOSE, &arg);
192 if (ret)
193 return -errno;
194
195 free(bo);
196 return 0;
197 }
198
199 drm_private int
exynos_create(int fd,struct kms_driver ** out)200 exynos_create(int fd, struct kms_driver **out)
201 {
202 struct kms_driver *kms;
203
204 kms = calloc(1, sizeof(*kms));
205 if (!kms)
206 return -ENOMEM;
207
208 kms->fd = fd;
209
210 kms->bo_create = exynos_bo_create;
211 kms->bo_map = exynos_bo_map;
212 kms->bo_unmap = exynos_bo_unmap;
213 kms->bo_get_prop = exynos_bo_get_prop;
214 kms->bo_destroy = exynos_bo_destroy;
215 kms->get_prop = exynos_get_prop;
216 kms->destroy = exynos_destroy;
217 *out = kms;
218
219 return 0;
220 }
221