1 /*
2 * Copyright © 2014-2017 Broadcom
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 #include <errno.h>
25 #include <err.h>
26 #include <sys/mman.h>
27 #include <fcntl.h>
28 #include <xf86drm.h>
29 #include <xf86drmMode.h>
30
31 #include "util/u_hash_table.h"
32 #include "util/u_memory.h"
33 #include "util/ralloc.h"
34
35 #include "v3d_context.h"
36 #include "v3d_screen.h"
37
38 static bool dump_stats = false;
39
40 static void
41 v3d_bo_cache_free_all(struct v3d_bo_cache *cache);
42
43 static void
v3d_bo_dump_stats(struct v3d_screen * screen)44 v3d_bo_dump_stats(struct v3d_screen *screen)
45 {
46 struct v3d_bo_cache *cache = &screen->bo_cache;
47
48 uint32_t cache_count = 0;
49 uint32_t cache_size = 0;
50 list_for_each_entry(struct v3d_bo, bo, &cache->time_list, time_list) {
51 cache_count++;
52 cache_size += bo->size;
53 }
54
55 fprintf(stderr, " BOs allocated: %d\n", screen->bo_count);
56 fprintf(stderr, " BOs size: %dkb\n", screen->bo_size / 1024);
57 fprintf(stderr, " BOs cached: %d\n", cache_count);
58 fprintf(stderr, " BOs cached size: %dkb\n", cache_size / 1024);
59
60 if (!list_is_empty(&cache->time_list)) {
61 struct v3d_bo *first = list_first_entry(&cache->time_list,
62 struct v3d_bo,
63 time_list);
64 struct v3d_bo *last = list_last_entry(&cache->time_list,
65 struct v3d_bo,
66 time_list);
67
68 fprintf(stderr, " oldest cache time: %ld\n",
69 (long)first->free_time);
70 fprintf(stderr, " newest cache time: %ld\n",
71 (long)last->free_time);
72
73 struct timespec time;
74 clock_gettime(CLOCK_MONOTONIC, &time);
75 fprintf(stderr, " now: %jd\n",
76 (intmax_t)time.tv_sec);
77 }
78 }
79
80 static void
v3d_bo_remove_from_cache(struct v3d_bo_cache * cache,struct v3d_bo * bo)81 v3d_bo_remove_from_cache(struct v3d_bo_cache *cache, struct v3d_bo *bo)
82 {
83 list_del(&bo->time_list);
84 list_del(&bo->size_list);
85 }
86
87 static struct v3d_bo *
v3d_bo_from_cache(struct v3d_screen * screen,uint32_t size,const char * name)88 v3d_bo_from_cache(struct v3d_screen *screen, uint32_t size, const char *name)
89 {
90 struct v3d_bo_cache *cache = &screen->bo_cache;
91 uint32_t page_index = size / 4096 - 1;
92
93 if (cache->size_list_size <= page_index)
94 return NULL;
95
96 struct v3d_bo *bo = NULL;
97 mtx_lock(&cache->lock);
98 if (!list_is_empty(&cache->size_list[page_index])) {
99 bo = list_first_entry(&cache->size_list[page_index],
100 struct v3d_bo, size_list);
101
102 /* Check that the BO has gone idle. If not, then we want to
103 * allocate something new instead, since we assume that the
104 * user will proceed to CPU map it and fill it with stuff.
105 */
106 if (!v3d_bo_wait(bo, 0, NULL)) {
107 mtx_unlock(&cache->lock);
108 return NULL;
109 }
110
111 pipe_reference_init(&bo->reference, 1);
112 v3d_bo_remove_from_cache(cache, bo);
113
114 bo->name = name;
115 }
116 mtx_unlock(&cache->lock);
117 return bo;
118 }
119
120 struct v3d_bo *
v3d_bo_alloc(struct v3d_screen * screen,uint32_t size,const char * name)121 v3d_bo_alloc(struct v3d_screen *screen, uint32_t size, const char *name)
122 {
123 struct v3d_bo *bo;
124 int ret;
125
126 /* The CLIF dumping requires that there is no whitespace in the name.
127 */
128 assert(!strchr(name, ' '));
129
130 size = align(size, 4096);
131
132 bo = v3d_bo_from_cache(screen, size, name);
133 if (bo) {
134 if (dump_stats) {
135 fprintf(stderr, "Allocated %s %dkb from cache:\n",
136 name, size / 1024);
137 v3d_bo_dump_stats(screen);
138 }
139 return bo;
140 }
141
142 bo = CALLOC_STRUCT(v3d_bo);
143 if (!bo)
144 return NULL;
145
146 pipe_reference_init(&bo->reference, 1);
147 bo->screen = screen;
148 bo->size = size;
149 bo->name = name;
150 bo->private = true;
151
152 retry:
153 ;
154
155 bool cleared_and_retried = false;
156 struct drm_v3d_create_bo create = {
157 .size = size
158 };
159
160 ret = v3d_ioctl(screen->fd, DRM_IOCTL_V3D_CREATE_BO, &create);
161 bo->handle = create.handle;
162 bo->offset = create.offset;
163
164 if (ret != 0) {
165 if (!list_is_empty(&screen->bo_cache.time_list) &&
166 !cleared_and_retried) {
167 cleared_and_retried = true;
168 v3d_bo_cache_free_all(&screen->bo_cache);
169 goto retry;
170 }
171
172 free(bo);
173 return NULL;
174 }
175
176 screen->bo_count++;
177 screen->bo_size += bo->size;
178 if (dump_stats) {
179 fprintf(stderr, "Allocated %s %dkb:\n", name, size / 1024);
180 v3d_bo_dump_stats(screen);
181 }
182
183 return bo;
184 }
185
186 void
v3d_bo_last_unreference(struct v3d_bo * bo)187 v3d_bo_last_unreference(struct v3d_bo *bo)
188 {
189 struct v3d_screen *screen = bo->screen;
190
191 struct timespec time;
192 clock_gettime(CLOCK_MONOTONIC, &time);
193 mtx_lock(&screen->bo_cache.lock);
194 v3d_bo_last_unreference_locked_timed(bo, time.tv_sec);
195 mtx_unlock(&screen->bo_cache.lock);
196 }
197
198 static void
v3d_bo_free(struct v3d_bo * bo)199 v3d_bo_free(struct v3d_bo *bo)
200 {
201 struct v3d_screen *screen = bo->screen;
202
203 if (bo->map) {
204 if (using_v3d_simulator && bo->name &&
205 strcmp(bo->name, "winsys") == 0) {
206 free(bo->map);
207 } else {
208 munmap(bo->map, bo->size);
209 VG(VALGRIND_FREELIKE_BLOCK(bo->map, 0));
210 }
211 }
212
213 struct drm_gem_close c;
214 memset(&c, 0, sizeof(c));
215 c.handle = bo->handle;
216 int ret = v3d_ioctl(screen->fd, DRM_IOCTL_GEM_CLOSE, &c);
217 if (ret != 0)
218 fprintf(stderr, "close object %d: %s\n", bo->handle, strerror(errno));
219
220 screen->bo_count--;
221 screen->bo_size -= bo->size;
222
223 if (dump_stats) {
224 fprintf(stderr, "Freed %s%s%dkb:\n",
225 bo->name ? bo->name : "",
226 bo->name ? " " : "",
227 bo->size / 1024);
228 v3d_bo_dump_stats(screen);
229 }
230
231 free(bo);
232 }
233
234 static void
free_stale_bos(struct v3d_screen * screen,time_t time)235 free_stale_bos(struct v3d_screen *screen, time_t time)
236 {
237 struct v3d_bo_cache *cache = &screen->bo_cache;
238 bool freed_any = false;
239
240 list_for_each_entry_safe(struct v3d_bo, bo, &cache->time_list,
241 time_list) {
242 /* If it's more than a second old, free it. */
243 if (time - bo->free_time > 2) {
244 if (dump_stats && !freed_any) {
245 fprintf(stderr, "Freeing stale BOs:\n");
246 v3d_bo_dump_stats(screen);
247 freed_any = true;
248 }
249 v3d_bo_remove_from_cache(cache, bo);
250 v3d_bo_free(bo);
251 } else {
252 break;
253 }
254 }
255
256 if (dump_stats && freed_any) {
257 fprintf(stderr, "Freed stale BOs:\n");
258 v3d_bo_dump_stats(screen);
259 }
260 }
261
262 static void
v3d_bo_cache_free_all(struct v3d_bo_cache * cache)263 v3d_bo_cache_free_all(struct v3d_bo_cache *cache)
264 {
265 mtx_lock(&cache->lock);
266 list_for_each_entry_safe(struct v3d_bo, bo, &cache->time_list,
267 time_list) {
268 v3d_bo_remove_from_cache(cache, bo);
269 v3d_bo_free(bo);
270 }
271 mtx_unlock(&cache->lock);
272 }
273
274 void
v3d_bo_last_unreference_locked_timed(struct v3d_bo * bo,time_t time)275 v3d_bo_last_unreference_locked_timed(struct v3d_bo *bo, time_t time)
276 {
277 struct v3d_screen *screen = bo->screen;
278 struct v3d_bo_cache *cache = &screen->bo_cache;
279 uint32_t page_index = bo->size / 4096 - 1;
280
281 if (!bo->private) {
282 v3d_bo_free(bo);
283 return;
284 }
285
286 if (cache->size_list_size <= page_index) {
287 struct list_head *new_list =
288 ralloc_array(screen, struct list_head, page_index + 1);
289
290 /* Move old list contents over (since the array has moved, and
291 * therefore the pointers to the list heads have to change).
292 */
293 for (int i = 0; i < cache->size_list_size; i++) {
294 struct list_head *old_head = &cache->size_list[i];
295 if (list_is_empty(old_head))
296 list_inithead(&new_list[i]);
297 else {
298 new_list[i].next = old_head->next;
299 new_list[i].prev = old_head->prev;
300 new_list[i].next->prev = &new_list[i];
301 new_list[i].prev->next = &new_list[i];
302 }
303 }
304 for (int i = cache->size_list_size; i < page_index + 1; i++)
305 list_inithead(&new_list[i]);
306
307 cache->size_list = new_list;
308 cache->size_list_size = page_index + 1;
309 }
310
311 bo->free_time = time;
312 list_addtail(&bo->size_list, &cache->size_list[page_index]);
313 list_addtail(&bo->time_list, &cache->time_list);
314 if (dump_stats) {
315 fprintf(stderr, "Freed %s %dkb to cache:\n",
316 bo->name, bo->size / 1024);
317 v3d_bo_dump_stats(screen);
318 }
319 bo->name = NULL;
320
321 free_stale_bos(screen, time);
322 }
323
324 static struct v3d_bo *
v3d_bo_open_handle(struct v3d_screen * screen,uint32_t handle,uint32_t size)325 v3d_bo_open_handle(struct v3d_screen *screen,
326 uint32_t handle, uint32_t size)
327 {
328 struct v3d_bo *bo;
329
330 /* Note: the caller is responsible for locking screen->bo_handles_mutex.
331 * This allows the lock to cover the actual BO import, avoiding a race.
332 */
333
334 assert(size);
335
336 bo = util_hash_table_get(screen->bo_handles, (void*)(uintptr_t)handle);
337 if (bo) {
338 pipe_reference(NULL, &bo->reference);
339 goto done;
340 }
341
342 bo = CALLOC_STRUCT(v3d_bo);
343 pipe_reference_init(&bo->reference, 1);
344 bo->screen = screen;
345 bo->handle = handle;
346 bo->size = size;
347 bo->name = "winsys";
348 bo->private = false;
349
350 #ifdef USE_V3D_SIMULATOR
351 v3d_simulator_open_from_handle(screen->fd, bo->handle, bo->size);
352 bo->map = malloc(bo->size);
353 #endif
354
355 struct drm_v3d_get_bo_offset get = {
356 .handle = handle,
357 };
358 int ret = v3d_ioctl(screen->fd, DRM_IOCTL_V3D_GET_BO_OFFSET, &get);
359 if (ret) {
360 fprintf(stderr, "Failed to get BO offset: %s\n",
361 strerror(errno));
362 free(bo->map);
363 free(bo);
364 bo = NULL;
365 goto done;
366 }
367 bo->offset = get.offset;
368 assert(bo->offset != 0);
369
370 _mesa_hash_table_insert(screen->bo_handles, (void *)(uintptr_t)handle, bo);
371
372 screen->bo_count++;
373 screen->bo_size += bo->size;
374
375 done:
376 mtx_unlock(&screen->bo_handles_mutex);
377 return bo;
378 }
379
380 struct v3d_bo *
v3d_bo_open_name(struct v3d_screen * screen,uint32_t name)381 v3d_bo_open_name(struct v3d_screen *screen, uint32_t name)
382 {
383 struct drm_gem_open o = {
384 .name = name
385 };
386 mtx_lock(&screen->bo_handles_mutex);
387
388 int ret = v3d_ioctl(screen->fd, DRM_IOCTL_GEM_OPEN, &o);
389 if (ret) {
390 fprintf(stderr, "Failed to open bo %d: %s\n",
391 name, strerror(errno));
392 mtx_unlock(&screen->bo_handles_mutex);
393 return NULL;
394 }
395
396 return v3d_bo_open_handle(screen, o.handle, o.size);
397 }
398
399 struct v3d_bo *
v3d_bo_open_dmabuf(struct v3d_screen * screen,int fd)400 v3d_bo_open_dmabuf(struct v3d_screen *screen, int fd)
401 {
402 uint32_t handle;
403
404 mtx_lock(&screen->bo_handles_mutex);
405
406 int ret = drmPrimeFDToHandle(screen->fd, fd, &handle);
407 int size;
408 if (ret) {
409 fprintf(stderr, "Failed to get v3d handle for dmabuf %d\n", fd);
410 mtx_unlock(&screen->bo_handles_mutex);
411 return NULL;
412 }
413
414 /* Determine the size of the bo we were handed. */
415 size = lseek(fd, 0, SEEK_END);
416 if (size == -1) {
417 fprintf(stderr, "Couldn't get size of dmabuf fd %d.\n", fd);
418 mtx_unlock(&screen->bo_handles_mutex);
419 return NULL;
420 }
421
422 return v3d_bo_open_handle(screen, handle, size);
423 }
424
425 int
v3d_bo_get_dmabuf(struct v3d_bo * bo)426 v3d_bo_get_dmabuf(struct v3d_bo *bo)
427 {
428 int fd;
429 int ret = drmPrimeHandleToFD(bo->screen->fd, bo->handle,
430 O_CLOEXEC, &fd);
431 if (ret != 0) {
432 fprintf(stderr, "Failed to export gem bo %d to dmabuf\n",
433 bo->handle);
434 return -1;
435 }
436
437 mtx_lock(&bo->screen->bo_handles_mutex);
438 bo->private = false;
439 _mesa_hash_table_insert(bo->screen->bo_handles, (void *)(uintptr_t)bo->handle, bo);
440 mtx_unlock(&bo->screen->bo_handles_mutex);
441
442 return fd;
443 }
444
445 bool
v3d_bo_flink(struct v3d_bo * bo,uint32_t * name)446 v3d_bo_flink(struct v3d_bo *bo, uint32_t *name)
447 {
448 struct drm_gem_flink flink = {
449 .handle = bo->handle,
450 };
451 int ret = v3d_ioctl(bo->screen->fd, DRM_IOCTL_GEM_FLINK, &flink);
452 if (ret) {
453 fprintf(stderr, "Failed to flink bo %d: %s\n",
454 bo->handle, strerror(errno));
455 free(bo);
456 return false;
457 }
458
459 bo->private = false;
460 *name = flink.name;
461
462 return true;
463 }
464
v3d_wait_bo_ioctl(int fd,uint32_t handle,uint64_t timeout_ns)465 static int v3d_wait_bo_ioctl(int fd, uint32_t handle, uint64_t timeout_ns)
466 {
467 struct drm_v3d_wait_bo wait = {
468 .handle = handle,
469 .timeout_ns = timeout_ns,
470 };
471 int ret = v3d_ioctl(fd, DRM_IOCTL_V3D_WAIT_BO, &wait);
472 if (ret == -1)
473 return -errno;
474 else
475 return 0;
476
477 }
478
479 bool
v3d_bo_wait(struct v3d_bo * bo,uint64_t timeout_ns,const char * reason)480 v3d_bo_wait(struct v3d_bo *bo, uint64_t timeout_ns, const char *reason)
481 {
482 struct v3d_screen *screen = bo->screen;
483
484 if (V3D_DBG(PERF) && timeout_ns && reason) {
485 if (v3d_wait_bo_ioctl(screen->fd, bo->handle, 0) == -ETIME) {
486 fprintf(stderr, "Blocking on %s BO for %s\n",
487 bo->name, reason);
488 }
489 }
490
491 int ret = v3d_wait_bo_ioctl(screen->fd, bo->handle, timeout_ns);
492 if (ret) {
493 if (ret != -ETIME) {
494 fprintf(stderr, "wait failed: %d\n", ret);
495 abort();
496 }
497
498 return false;
499 }
500
501 return true;
502 }
503
504 void *
v3d_bo_map_unsynchronized(struct v3d_bo * bo)505 v3d_bo_map_unsynchronized(struct v3d_bo *bo)
506 {
507 uint64_t offset;
508 int ret;
509
510 if (bo->map)
511 return bo->map;
512
513 struct drm_v3d_mmap_bo map;
514 memset(&map, 0, sizeof(map));
515 map.handle = bo->handle;
516 ret = v3d_ioctl(bo->screen->fd, DRM_IOCTL_V3D_MMAP_BO, &map);
517 offset = map.offset;
518 if (ret != 0) {
519 fprintf(stderr, "map ioctl failure\n");
520 abort();
521 }
522
523 bo->map = mmap(NULL, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
524 bo->screen->fd, offset);
525 if (bo->map == MAP_FAILED) {
526 fprintf(stderr, "mmap of bo %d (offset 0x%016llx, size %d) failed\n",
527 bo->handle, (long long)offset, bo->size);
528 abort();
529 }
530 VG(VALGRIND_MALLOCLIKE_BLOCK(bo->map, bo->size, 0, false));
531
532 return bo->map;
533 }
534
535 void *
v3d_bo_map(struct v3d_bo * bo)536 v3d_bo_map(struct v3d_bo *bo)
537 {
538 void *map = v3d_bo_map_unsynchronized(bo);
539
540 bool ok = v3d_bo_wait(bo, OS_TIMEOUT_INFINITE, "bo map");
541 if (!ok) {
542 fprintf(stderr, "BO wait for map failed\n");
543 abort();
544 }
545
546 return map;
547 }
548
549 void
v3d_bufmgr_destroy(struct pipe_screen * pscreen)550 v3d_bufmgr_destroy(struct pipe_screen *pscreen)
551 {
552 struct v3d_screen *screen = v3d_screen(pscreen);
553 struct v3d_bo_cache *cache = &screen->bo_cache;
554
555 v3d_bo_cache_free_all(cache);
556
557 if (dump_stats) {
558 fprintf(stderr, "BO stats after screen destroy:\n");
559 v3d_bo_dump_stats(screen);
560 }
561 }
562