be88241d61b70fae33aeba7832a37a61c3de2a7e
[mesa.git] / src / etnaviv / drm / etnaviv_bo.c
1 /*
2 * Copyright (C) 2014 Etnaviv Project
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 * Christian Gmeiner <christian.gmeiner@gmail.com>
25 */
26
27 #include "etnaviv_priv.h"
28 #include "etnaviv_drmif.h"
29
30 pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
31 void bo_del(struct etna_bo *bo);
32
33 /* set buffer name, and add to table, call w/ table_lock held: */
34 static void set_name(struct etna_bo *bo, uint32_t name)
35 {
36 bo->name = name;
37 /* add ourself into the name table: */
38 drmHashInsert(bo->dev->name_table, name, bo);
39 }
40
41 /* Called under table_lock */
42 void bo_del(struct etna_bo *bo)
43 {
44 if (bo->map)
45 drm_munmap(bo->map, bo->size);
46
47 if (bo->name)
48 drmHashDelete(bo->dev->name_table, bo->name);
49
50 if (bo->handle) {
51 struct drm_gem_close req = {
52 .handle = bo->handle,
53 };
54
55 drmHashDelete(bo->dev->handle_table, bo->handle);
56 drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
57 }
58
59 free(bo);
60 }
61
62 /* lookup a buffer from it's handle, call w/ table_lock held: */
63 static struct etna_bo *lookup_bo(void *tbl, uint32_t handle)
64 {
65 struct etna_bo *bo = NULL;
66
67 if (!drmHashLookup(tbl, handle, (void **)&bo)) {
68 /* found, incr refcnt and return: */
69 bo = etna_bo_ref(bo);
70
71 /* don't break the bucket if this bo was found in one */
72 list_delinit(&bo->list);
73 }
74
75 return bo;
76 }
77
78 /* allocate a new buffer object, call w/ table_lock held */
79 static struct etna_bo *bo_from_handle(struct etna_device *dev,
80 uint32_t size, uint32_t handle, uint32_t flags)
81 {
82 struct etna_bo *bo = calloc(sizeof(*bo), 1);
83
84 if (!bo) {
85 struct drm_gem_close req = {
86 .handle = handle,
87 };
88
89 drmIoctl(dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
90
91 return NULL;
92 }
93
94 bo->dev = etna_device_ref(dev);
95 bo->size = size;
96 bo->handle = handle;
97 bo->flags = flags;
98 atomic_set(&bo->refcnt, 1);
99 list_inithead(&bo->list);
100 /* add ourselves to the handle table: */
101 drmHashInsert(dev->handle_table, handle, bo);
102
103 return bo;
104 }
105
106 /* allocate a new (un-tiled) buffer object */
107 struct etna_bo *etna_bo_new(struct etna_device *dev, uint32_t size,
108 uint32_t flags)
109 {
110 struct etna_bo *bo;
111 int ret;
112 struct drm_etnaviv_gem_new req = {
113 .flags = flags,
114 };
115
116 bo = etna_bo_cache_alloc(&dev->bo_cache, &size, flags);
117 if (bo)
118 return bo;
119
120 req.size = size;
121 ret = drmCommandWriteRead(dev->fd, DRM_ETNAVIV_GEM_NEW,
122 &req, sizeof(req));
123 if (ret)
124 return NULL;
125
126 pthread_mutex_lock(&table_lock);
127 bo = bo_from_handle(dev, size, req.handle, flags);
128 bo->reuse = 1;
129 pthread_mutex_unlock(&table_lock);
130
131 return bo;
132 }
133
134 struct etna_bo *etna_bo_ref(struct etna_bo *bo)
135 {
136 atomic_inc(&bo->refcnt);
137
138 return bo;
139 }
140
141 /* get buffer info */
142 static int get_buffer_info(struct etna_bo *bo)
143 {
144 int ret;
145 struct drm_etnaviv_gem_info req = {
146 .handle = bo->handle,
147 };
148
149 ret = drmCommandWriteRead(bo->dev->fd, DRM_ETNAVIV_GEM_INFO,
150 &req, sizeof(req));
151 if (ret) {
152 return ret;
153 }
154
155 /* really all we need for now is mmap offset */
156 bo->offset = req.offset;
157
158 return 0;
159 }
160
161 /* import a buffer object from DRI2 name */
162 struct etna_bo *etna_bo_from_name(struct etna_device *dev,
163 uint32_t name)
164 {
165 struct etna_bo *bo;
166 struct drm_gem_open req = {
167 .name = name,
168 };
169
170 pthread_mutex_lock(&table_lock);
171
172 /* check name table first, to see if bo is already open: */
173 bo = lookup_bo(dev->name_table, name);
174 if (bo)
175 goto out_unlock;
176
177 if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
178 ERROR_MSG("gem-open failed: %s", strerror(errno));
179 goto out_unlock;
180 }
181
182 bo = lookup_bo(dev->handle_table, req.handle);
183 if (bo)
184 goto out_unlock;
185
186 bo = bo_from_handle(dev, req.size, req.handle, 0);
187 if (bo)
188 set_name(bo, name);
189
190 out_unlock:
191 pthread_mutex_unlock(&table_lock);
192
193 return bo;
194 }
195
196 /* import a buffer from dmabuf fd, does not take ownership of the
197 * fd so caller should close() the fd when it is otherwise done
198 * with it (even if it is still using the 'struct etna_bo *')
199 */
200 struct etna_bo *etna_bo_from_dmabuf(struct etna_device *dev, int fd)
201 {
202 struct etna_bo *bo;
203 int ret, size;
204 uint32_t handle;
205
206 /* take the lock before calling drmPrimeFDToHandle to avoid
207 * racing against etna_bo_del, which might invalidate the
208 * returned handle.
209 */
210 pthread_mutex_lock(&table_lock);
211
212 ret = drmPrimeFDToHandle(dev->fd, fd, &handle);
213 if (ret) {
214 pthread_mutex_unlock(&table_lock);
215 return NULL;
216 }
217
218 bo = lookup_bo(dev->handle_table, handle);
219 if (bo)
220 goto out_unlock;
221
222 /* lseek() to get bo size */
223 size = lseek(fd, 0, SEEK_END);
224 lseek(fd, 0, SEEK_CUR);
225
226 bo = bo_from_handle(dev, size, handle, 0);
227
228 out_unlock:
229 pthread_mutex_unlock(&table_lock);
230
231 return bo;
232 }
233
234 /* destroy a buffer object */
235 void etna_bo_del(struct etna_bo *bo)
236 {
237 struct etna_device *dev = bo->dev;
238
239 if (!bo)
240 return;
241
242 if (!atomic_dec_and_test(&bo->refcnt))
243 return;
244
245 pthread_mutex_lock(&table_lock);
246
247 if (bo->reuse && (etna_bo_cache_free(&dev->bo_cache, bo) == 0))
248 goto out;
249
250 bo_del(bo);
251 etna_device_del_locked(dev);
252 out:
253 pthread_mutex_unlock(&table_lock);
254 }
255
256 /* get the global flink/DRI2 buffer name */
257 int etna_bo_get_name(struct etna_bo *bo, uint32_t *name)
258 {
259 if (!bo->name) {
260 struct drm_gem_flink req = {
261 .handle = bo->handle,
262 };
263 int ret;
264
265 ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
266 if (ret) {
267 return ret;
268 }
269
270 pthread_mutex_lock(&table_lock);
271 set_name(bo, req.name);
272 pthread_mutex_unlock(&table_lock);
273 bo->reuse = 0;
274 }
275
276 *name = bo->name;
277
278 return 0;
279 }
280
281 uint32_t etna_bo_handle(struct etna_bo *bo)
282 {
283 return bo->handle;
284 }
285
286 /* caller owns the dmabuf fd that is returned and is responsible
287 * to close() it when done
288 */
289 int etna_bo_dmabuf(struct etna_bo *bo)
290 {
291 int ret, prime_fd;
292
293 ret = drmPrimeHandleToFD(bo->dev->fd, bo->handle, DRM_CLOEXEC,
294 &prime_fd);
295 if (ret) {
296 ERROR_MSG("failed to get dmabuf fd: %d", ret);
297 return ret;
298 }
299
300 bo->reuse = 0;
301
302 return prime_fd;
303 }
304
305 uint32_t etna_bo_size(struct etna_bo *bo)
306 {
307 return bo->size;
308 }
309
310 void *etna_bo_map(struct etna_bo *bo)
311 {
312 if (!bo->map) {
313 if (!bo->offset) {
314 get_buffer_info(bo);
315 }
316
317 bo->map = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE,
318 MAP_SHARED, bo->dev->fd, bo->offset);
319 if (bo->map == MAP_FAILED) {
320 ERROR_MSG("mmap failed: %s", strerror(errno));
321 bo->map = NULL;
322 }
323 }
324
325 return bo->map;
326 }
327
328 int etna_bo_cpu_prep(struct etna_bo *bo, uint32_t op)
329 {
330 struct drm_etnaviv_gem_cpu_prep req = {
331 .handle = bo->handle,
332 .op = op,
333 };
334
335 get_abs_timeout(&req.timeout, 5000000000);
336
337 return drmCommandWrite(bo->dev->fd, DRM_ETNAVIV_GEM_CPU_PREP,
338 &req, sizeof(req));
339 }
340
341 void etna_bo_cpu_fini(struct etna_bo *bo)
342 {
343 struct drm_etnaviv_gem_cpu_fini req = {
344 .handle = bo->handle,
345 };
346
347 drmCommandWrite(bo->dev->fd, DRM_ETNAVIV_GEM_CPU_FINI,
348 &req, sizeof(req));
349 }