freedreno_fence.c revision 01e04c3f 
1/*
2 * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
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 *    Rob Clark <robclark@freedesktop.org>
25 */
26
27#include <libsync.h>
28
29#include "util/u_inlines.h"
30
31#include "freedreno_fence.h"
32#include "freedreno_context.h"
33#include "freedreno_util.h"
34
35struct pipe_fence_handle {
36	struct pipe_reference reference;
37	/* fence holds a weak reference to the batch until the batch is flushed,
38	 * at which point fd_fence_populate() is called and timestamp and possibly
39	 * fence_fd become valid and the week reference is dropped.
40	 */
41	struct fd_batch *batch;
42	struct fd_pipe *pipe;
43	struct fd_screen *screen;
44	int fence_fd;
45	uint32_t timestamp;
46};
47
48static void fence_flush(struct pipe_fence_handle *fence)
49{
50	if (fence->batch)
51		fd_batch_flush(fence->batch, true, true);
52	debug_assert(!fence->batch);
53}
54
55void fd_fence_populate(struct pipe_fence_handle *fence,
56		uint32_t timestamp, int fence_fd)
57{
58	if (!fence->batch)
59		return;
60	fence->timestamp = timestamp;
61	fence->fence_fd = fence_fd;
62	fence->batch = NULL;
63}
64
65static void fd_fence_destroy(struct pipe_fence_handle *fence)
66{
67	if (fence->fence_fd != -1)
68		close(fence->fence_fd);
69	fd_pipe_del(fence->pipe);
70	FREE(fence);
71}
72
73void fd_fence_ref(struct pipe_screen *pscreen,
74		struct pipe_fence_handle **ptr,
75		struct pipe_fence_handle *pfence)
76{
77	if (pipe_reference(&(*ptr)->reference, &pfence->reference))
78		fd_fence_destroy(*ptr);
79
80	*ptr = pfence;
81}
82
83boolean fd_fence_finish(struct pipe_screen *pscreen,
84		struct pipe_context *ctx,
85		struct pipe_fence_handle *fence,
86		uint64_t timeout)
87{
88	fence_flush(fence);
89
90	if (fence->fence_fd != -1) {
91		int ret = sync_wait(fence->fence_fd, timeout / 1000000);
92		return ret == 0;
93	}
94
95	if (fd_pipe_wait_timeout(fence->pipe, fence->timestamp, timeout))
96		return false;
97
98	return true;
99}
100
101static struct pipe_fence_handle * fence_create(struct fd_context *ctx,
102		struct fd_batch *batch, uint32_t timestamp, int fence_fd)
103{
104	struct pipe_fence_handle *fence;
105
106	fence = CALLOC_STRUCT(pipe_fence_handle);
107	if (!fence)
108		return NULL;
109
110	pipe_reference_init(&fence->reference, 1);
111
112	fence->batch = batch;
113	fence->pipe = fd_pipe_ref(ctx->pipe);
114	fence->screen = ctx->screen;
115	fence->timestamp = timestamp;
116	fence->fence_fd = fence_fd;
117
118	return fence;
119}
120
121void fd_create_fence_fd(struct pipe_context *pctx,
122		struct pipe_fence_handle **pfence, int fd,
123		enum pipe_fd_type type)
124{
125	assert(type == PIPE_FD_TYPE_NATIVE_SYNC);
126	*pfence = fence_create(fd_context(pctx), NULL, 0, dup(fd));
127}
128
129void fd_fence_server_sync(struct pipe_context *pctx,
130		struct pipe_fence_handle *fence)
131{
132	struct fd_context *ctx = fd_context(pctx);
133	struct fd_batch *batch = fd_context_batch(ctx);
134
135	fence_flush(fence);
136
137	/* if not an external fence, then nothing more to do without preemption: */
138	if (fence->fence_fd == -1)
139		return;
140
141	if (sync_accumulate("freedreno", &batch->in_fence_fd, fence->fence_fd)) {
142		/* error */
143	}
144}
145
146int fd_fence_get_fd(struct pipe_screen *pscreen,
147		struct pipe_fence_handle *fence)
148{
149	fence_flush(fence);
150	return dup(fence->fence_fd);
151}
152
153struct pipe_fence_handle * fd_fence_create(struct fd_batch *batch)
154{
155	return fence_create(batch->ctx, batch, 0, -1);
156}
157