summaryrefslogtreecommitdiff
path: root/freedreno/freedreno_bo.c
blob: b90fc5679648a307873981daec3e7294ecc4eb9f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */

/*
 * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Authors:
 *    Rob Clark <robclark@freedesktop.org>
 */

#include "freedreno_drmif.h"
#include "freedreno_priv.h"

static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;

static void bo_del(struct fd_bo *bo);

/* set buffer name, and add to table, call w/ table_lock held: */
static void set_name(struct fd_bo *bo, uint32_t name)
{
	bo->name = name;
	/* add ourself into the handle table: */
	drmHashInsert(bo->dev->name_table, name, bo);
}

/* lookup a buffer, call w/ table_lock held: */
static struct fd_bo * lookup_bo(void *tbl, uint32_t key)
{
	struct fd_bo *bo = NULL;
	if (!drmHashLookup(tbl, key, (void **)&bo)) {
		/* found, incr refcnt and return: */
		bo = fd_bo_ref(bo);
	}
	return bo;
}

/* allocate a new buffer object, call w/ table_lock held */
static struct fd_bo * bo_from_handle(struct fd_device *dev,
		uint32_t size, uint32_t handle)
{
	struct fd_bo *bo;

	bo = dev->funcs->bo_from_handle(dev, size, handle);
	if (!bo) {
		struct drm_gem_close req = {
				.handle = handle,
		};
		drmIoctl(dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
		return NULL;
	}
	bo->dev = fd_device_ref(dev);
	bo->size = size;
	bo->handle = handle;
	atomic_set(&bo->refcnt, 1);
	list_inithead(&bo->list);
	/* add ourself into the handle table: */
	drmHashInsert(dev->handle_table, handle, bo);
	return bo;
}

/* Frees older cached buffers.  Called under table_lock */
void fd_cleanup_bo_cache(struct fd_device *dev, time_t time)
{
	int i;

	if (dev->time == time)
		return;

	for (i = 0; i < dev->num_buckets; i++) {
		struct fd_bo_bucket *bucket = &dev->cache_bucket[i];
		struct fd_bo *bo;

		while (!LIST_IS_EMPTY(&bucket->list)) {
			bo = LIST_ENTRY(struct fd_bo, bucket->list.next, list);

			/* keep things in cache for at least 1 second: */
			if (time && ((time - bo->free_time) <= 1))
				break;

			list_del(&bo->list);
			bo_del(bo);
		}
	}

	dev->time = time;
}

static struct fd_bo_bucket * get_bucket(struct fd_device *dev, uint32_t size)
{
	int i;

	/* hmm, this is what intel does, but I suppose we could calculate our
	 * way to the correct bucket size rather than looping..
	 */
	for (i = 0; i < dev->num_buckets; i++) {
		struct fd_bo_bucket *bucket = &dev->cache_bucket[i];
		if (bucket->size >= size) {
			return bucket;
		}
	}

	return NULL;
}

static int is_idle(struct fd_bo *bo)
{
	return fd_bo_cpu_prep(bo, NULL,
			DRM_FREEDRENO_PREP_READ |
			DRM_FREEDRENO_PREP_WRITE |
			DRM_FREEDRENO_PREP_NOSYNC) == 0;
}

static struct fd_bo *find_in_bucket(struct fd_device *dev,
		struct fd_bo_bucket *bucket, uint32_t flags)
{
	struct fd_bo *bo = NULL;

	/* TODO .. if we had an ALLOC_FOR_RENDER flag like intel, we could
	 * skip the busy check.. if it is only going to be a render target
	 * then we probably don't need to stall..
	 *
	 * NOTE that intel takes ALLOC_FOR_RENDER bo's from the list tail
	 * (MRU, since likely to be in GPU cache), rather than head (LRU)..
	 */
	pthread_mutex_lock(&table_lock);
	while (!LIST_IS_EMPTY(&bucket->list)) {
		bo = LIST_ENTRY(struct fd_bo, bucket->list.next, list);
		if (0 /* TODO: if madvise tells us bo is gone... */) {
			list_del(&bo->list);
			bo_del(bo);
			bo = NULL;
			continue;
		}
		/* TODO check for compatible flags? */
		if (is_idle(bo)) {
			list_del(&bo->list);
			break;
		}
		bo = NULL;
		break;
	}
	pthread_mutex_unlock(&table_lock);

	return bo;
}


drm_public struct fd_bo *
fd_bo_new(struct fd_device *dev, uint32_t size, uint32_t flags)
{
	struct fd_bo *bo = NULL;
	struct fd_bo_bucket *bucket;
	uint32_t handle;
	int ret;

	size = ALIGN(size, 4096);
	bucket = get_bucket(dev, size);

	/* see if we can be green and recycle: */
	if (bucket) {
		size = bucket->size;
		bo = find_in_bucket(dev, bucket, flags);
		if (bo) {
			atomic_set(&bo->refcnt, 1);
			fd_device_ref(bo->dev);
			return bo;
		}
	}

	ret = dev->funcs->bo_new_handle(dev, size, flags, &handle);
	if (ret)
		return NULL;

	pthread_mutex_lock(&table_lock);
	bo = bo_from_handle(dev, size, handle);
	bo->bo_reuse = 1;
	pthread_mutex_unlock(&table_lock);

	return bo;
}

drm_public struct fd_bo *
fd_bo_from_handle(struct fd_device *dev, uint32_t handle, uint32_t size)
{
	struct fd_bo *bo = NULL;

	pthread_mutex_lock(&table_lock);
	bo = bo_from_handle(dev, size, handle);
	pthread_mutex_unlock(&table_lock);

	return bo;
}

drm_public struct fd_bo *
fd_bo_from_dmabuf(struct fd_device *dev, int fd)
{
	struct drm_prime_handle req = {
			.fd = fd,
	};
	int ret, size;

	ret = drmIoctl(dev->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &req);
	if (ret) {
		return NULL;
	}

	/* hmm, would be nice if we had a way to figure out the size.. */
	size = 0;

	return fd_bo_from_handle(dev, req.handle, size);
}

drm_public struct fd_bo * fd_bo_from_name(struct fd_device *dev, uint32_t name)
{
	struct drm_gem_open req = {
			.name = name,
	};
	struct fd_bo *bo;

	pthread_mutex_lock(&table_lock);

	/* check name table first, to see if bo is already open: */
	bo = lookup_bo(dev->name_table, name);
	if (bo)
		goto out_unlock;

	if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
		ERROR_MSG("gem-open failed: %s", strerror(errno));
		goto out_unlock;
	}

	bo = lookup_bo(dev->handle_table, req.handle);
	if (bo)
		goto out_unlock;

	bo = bo_from_handle(dev, req.size, req.handle);
	if (bo)
		set_name(bo, name);

out_unlock:
	pthread_mutex_unlock(&table_lock);

	return bo;
}

drm_public struct fd_bo * fd_bo_ref(struct fd_bo *bo)
{
	atomic_inc(&bo->refcnt);
	return bo;
}

drm_public void fd_bo_del(struct fd_bo *bo)
{
	struct fd_device *dev = bo->dev;

	if (!atomic_dec_and_test(&bo->refcnt))
		return;

	if (bo->fd) {
		close(bo->fd);
		bo->fd = 0;
	}

	pthread_mutex_lock(&table_lock);

	if (bo->bo_reuse) {
		struct fd_bo_bucket *bucket = get_bucket(dev, bo->size);

		/* see if we can be green and recycle: */
		if (bucket) {
			struct timespec time;

			clock_gettime(CLOCK_MONOTONIC, &time);

			bo->free_time = time.tv_sec;
			list_addtail(&bo->list, &bucket->list);
			fd_cleanup_bo_cache(dev, time.tv_sec);

			/* bo's in the bucket cache don't have a ref and
			 * don't hold a ref to the dev:
			 */

			goto out;
		}
	}

	bo_del(bo);
out:
	fd_device_del_locked(dev);
	pthread_mutex_unlock(&table_lock);
}

/* Called under table_lock */
static void bo_del(struct fd_bo *bo)
{
	if (bo->map)
		munmap(bo->map, bo->size);

	/* TODO probably bo's in bucket list get removed from
	 * handle table??
	 */

	if (bo->handle) {
		struct drm_gem_close req = {
				.handle = bo->handle,
		};
		drmHashDelete(bo->dev->handle_table, bo->handle);
		if (bo->name)
			drmHashDelete(bo->dev->name_table, bo->name);
		drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
	}

	bo->funcs->destroy(bo);
}

drm_public int fd_bo_get_name(struct fd_bo *bo, uint32_t *name)
{
	if (!bo->name) {
		struct drm_gem_flink req = {
				.handle = bo->handle,
		};
		int ret;

		ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
		if (ret) {
			return ret;
		}

		pthread_mutex_lock(&table_lock);
		set_name(bo, req.name);
		pthread_mutex_unlock(&table_lock);
	}

	*name = bo->name;

	return 0;
}

drm_public uint32_t fd_bo_handle(struct fd_bo *bo)
{
	return bo->handle;
}

drm_public int fd_bo_dmabuf(struct fd_bo *bo)
{
	if (!bo->fd) {
		struct drm_prime_handle req = {
				.handle = bo->handle,
				.flags = DRM_CLOEXEC,
		};
		int ret;

		ret = drmIoctl(bo->dev->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &req);
		if (ret) {
			return ret;
		}

		bo->fd = req.fd;
	}
	return dup(bo->fd);
}

drm_public uint32_t fd_bo_size(struct fd_bo *bo)
{
	return bo->size;
}

drm_public void * fd_bo_map(struct fd_bo *bo)
{
	if (!bo->map) {
		uint64_t offset;
		int ret;

		ret = bo->funcs->offset(bo, &offset);
		if (ret) {
			return NULL;
		}

		bo->map = mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
				bo->dev->fd, offset);
		if (bo->map == MAP_FAILED) {
			ERROR_MSG("mmap failed: %s", strerror(errno));
			bo->map = NULL;
		}
	}
	return bo->map;
}

/* a bit odd to take the pipe as an arg, but it's a, umm, quirk of kgsl.. */
drm_public int fd_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
{
	return bo->funcs->cpu_prep(bo, pipe, op);
}

drm_public void fd_bo_cpu_fini(struct fd_bo *bo)
{
	bo->funcs->cpu_fini(bo);
}