1 /*
2 * Copyright © 2012, 2013 Thierry Reding
3 * Copyright © 2013 Erik Faye-Lund
4 * Copyright © 2014 NVIDIA Corporation
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include <errno.h>
26 #include <fcntl.h>
27 #include <string.h>
28 #include <unistd.h>
29
30 #include <sys/mman.h>
31
32 #include <xf86drm.h>
33
34 #include <tegra_drm.h>
35
36 #include "private.h"
37
drm_tegra_bo_free(struct drm_tegra_bo * bo)38 static void drm_tegra_bo_free(struct drm_tegra_bo *bo)
39 {
40 struct drm_tegra *drm = bo->drm;
41
42 if (bo->map)
43 munmap(bo->map, bo->size);
44
45 drmCloseBufferHandle(drm->fd, bo->handle);
46
47 free(bo);
48 }
49
drm_tegra_wrap(struct drm_tegra ** drmp,int fd,bool close)50 static int drm_tegra_wrap(struct drm_tegra **drmp, int fd, bool close)
51 {
52 struct drm_tegra *drm;
53
54 if (fd < 0 || !drmp)
55 return -EINVAL;
56
57 drm = calloc(1, sizeof(*drm));
58 if (!drm)
59 return -ENOMEM;
60
61 drm->close = close;
62 drm->fd = fd;
63
64 *drmp = drm;
65
66 return 0;
67 }
68
drm_tegra_new(struct drm_tegra ** drmp,int fd)69 drm_public int drm_tegra_new(struct drm_tegra **drmp, int fd)
70 {
71 bool supported = false;
72 drmVersionPtr version;
73
74 version = drmGetVersion(fd);
75 if (!version)
76 return -ENOMEM;
77
78 if (!strncmp(version->name, "tegra", version->name_len))
79 supported = true;
80
81 drmFreeVersion(version);
82
83 if (!supported)
84 return -ENOTSUP;
85
86 return drm_tegra_wrap(drmp, fd, false);
87 }
88
drm_tegra_close(struct drm_tegra * drm)89 drm_public void drm_tegra_close(struct drm_tegra *drm)
90 {
91 if (!drm)
92 return;
93
94 if (drm->close)
95 close(drm->fd);
96
97 free(drm);
98 }
99
drm_tegra_bo_new(struct drm_tegra_bo ** bop,struct drm_tegra * drm,uint32_t flags,uint32_t size)100 drm_public int drm_tegra_bo_new(struct drm_tegra_bo **bop, struct drm_tegra *drm,
101 uint32_t flags, uint32_t size)
102 {
103 struct drm_tegra_gem_create args;
104 struct drm_tegra_bo *bo;
105 int err;
106
107 if (!drm || size == 0 || !bop)
108 return -EINVAL;
109
110 bo = calloc(1, sizeof(*bo));
111 if (!bo)
112 return -ENOMEM;
113
114 atomic_set(&bo->ref, 1);
115 bo->flags = flags;
116 bo->size = size;
117 bo->drm = drm;
118
119 memset(&args, 0, sizeof(args));
120 args.flags = flags;
121 args.size = size;
122
123 err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_CREATE, &args,
124 sizeof(args));
125 if (err < 0) {
126 err = -errno;
127 free(bo);
128 return err;
129 }
130
131 bo->handle = args.handle;
132
133 *bop = bo;
134
135 return 0;
136 }
137
drm_tegra_bo_wrap(struct drm_tegra_bo ** bop,struct drm_tegra * drm,uint32_t handle,uint32_t flags,uint32_t size)138 drm_public int drm_tegra_bo_wrap(struct drm_tegra_bo **bop, struct drm_tegra *drm,
139 uint32_t handle, uint32_t flags, uint32_t size)
140 {
141 struct drm_tegra_bo *bo;
142
143 if (!drm || !bop)
144 return -EINVAL;
145
146 bo = calloc(1, sizeof(*bo));
147 if (!bo)
148 return -ENOMEM;
149
150 atomic_set(&bo->ref, 1);
151 bo->handle = handle;
152 bo->flags = flags;
153 bo->size = size;
154 bo->drm = drm;
155
156 *bop = bo;
157
158 return 0;
159 }
160
drm_tegra_bo_ref(struct drm_tegra_bo * bo)161 drm_public struct drm_tegra_bo *drm_tegra_bo_ref(struct drm_tegra_bo *bo)
162 {
163 if (bo)
164 atomic_inc(&bo->ref);
165
166 return bo;
167 }
168
drm_tegra_bo_unref(struct drm_tegra_bo * bo)169 drm_public void drm_tegra_bo_unref(struct drm_tegra_bo *bo)
170 {
171 if (bo && atomic_dec_and_test(&bo->ref))
172 drm_tegra_bo_free(bo);
173 }
174
drm_tegra_bo_get_handle(struct drm_tegra_bo * bo,uint32_t * handle)175 drm_public int drm_tegra_bo_get_handle(struct drm_tegra_bo *bo, uint32_t *handle)
176 {
177 if (!bo || !handle)
178 return -EINVAL;
179
180 *handle = bo->handle;
181
182 return 0;
183 }
184
drm_tegra_bo_map(struct drm_tegra_bo * bo,void ** ptr)185 drm_public int drm_tegra_bo_map(struct drm_tegra_bo *bo, void **ptr)
186 {
187 struct drm_tegra *drm = bo->drm;
188
189 if (!bo->map) {
190 struct drm_tegra_gem_mmap args;
191 int err;
192
193 memset(&args, 0, sizeof(args));
194 args.handle = bo->handle;
195
196 err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_MMAP, &args,
197 sizeof(args));
198 if (err < 0)
199 return -errno;
200
201 bo->offset = args.offset;
202
203 bo->map = mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
204 drm->fd, bo->offset);
205 if (bo->map == MAP_FAILED) {
206 bo->map = NULL;
207 return -errno;
208 }
209 }
210
211 if (ptr)
212 *ptr = bo->map;
213
214 return 0;
215 }
216
drm_tegra_bo_unmap(struct drm_tegra_bo * bo)217 drm_public int drm_tegra_bo_unmap(struct drm_tegra_bo *bo)
218 {
219 if (!bo)
220 return -EINVAL;
221
222 if (!bo->map)
223 return 0;
224
225 if (munmap(bo->map, bo->size))
226 return -errno;
227
228 bo->map = NULL;
229
230 return 0;
231 }
232
drm_tegra_bo_get_flags(struct drm_tegra_bo * bo,uint32_t * flags)233 drm_public int drm_tegra_bo_get_flags(struct drm_tegra_bo *bo, uint32_t *flags)
234 {
235 struct drm_tegra_gem_get_flags args;
236 struct drm_tegra *drm = bo->drm;
237 int err;
238
239 if (!bo)
240 return -EINVAL;
241
242 memset(&args, 0, sizeof(args));
243 args.handle = bo->handle;
244
245 err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_GET_FLAGS, &args,
246 sizeof(args));
247 if (err < 0)
248 return -errno;
249
250 if (flags)
251 *flags = args.flags;
252
253 return 0;
254 }
255
drm_tegra_bo_set_flags(struct drm_tegra_bo * bo,uint32_t flags)256 drm_public int drm_tegra_bo_set_flags(struct drm_tegra_bo *bo, uint32_t flags)
257 {
258 struct drm_tegra_gem_get_flags args;
259 struct drm_tegra *drm = bo->drm;
260 int err;
261
262 if (!bo)
263 return -EINVAL;
264
265 memset(&args, 0, sizeof(args));
266 args.handle = bo->handle;
267 args.flags = flags;
268
269 err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_SET_FLAGS, &args,
270 sizeof(args));
271 if (err < 0)
272 return -errno;
273
274 return 0;
275 }
276
drm_tegra_bo_get_tiling(struct drm_tegra_bo * bo,struct drm_tegra_bo_tiling * tiling)277 drm_public int drm_tegra_bo_get_tiling(struct drm_tegra_bo *bo,
278 struct drm_tegra_bo_tiling *tiling)
279 {
280 struct drm_tegra_gem_get_tiling args;
281 struct drm_tegra *drm = bo->drm;
282 int err;
283
284 if (!bo)
285 return -EINVAL;
286
287 memset(&args, 0, sizeof(args));
288 args.handle = bo->handle;
289
290 err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_GET_TILING, &args,
291 sizeof(args));
292 if (err < 0)
293 return -errno;
294
295 if (tiling) {
296 tiling->mode = args.mode;
297 tiling->value = args.value;
298 }
299
300 return 0;
301 }
302
drm_tegra_bo_set_tiling(struct drm_tegra_bo * bo,const struct drm_tegra_bo_tiling * tiling)303 drm_public int drm_tegra_bo_set_tiling(struct drm_tegra_bo *bo,
304 const struct drm_tegra_bo_tiling *tiling)
305 {
306 struct drm_tegra_gem_set_tiling args;
307 struct drm_tegra *drm = bo->drm;
308 int err;
309
310 if (!bo)
311 return -EINVAL;
312
313 memset(&args, 0, sizeof(args));
314 args.handle = bo->handle;
315 args.mode = tiling->mode;
316 args.value = tiling->value;
317
318 err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_SET_TILING, &args,
319 sizeof(args));
320 if (err < 0)
321 return -errno;
322
323 return 0;
324 }
325