2 * Copyright © 2008 Intel Corporation
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:
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
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
24 * Eric Anholt <eric@anholt.net>
28 /** @file intel_syncobj.c
30 * Support for ARB_sync
32 * ARB_sync is implemented by flushing the current batchbuffer and keeping a
33 * reference on it. We can then check for completion or wait for completion
34 * using the normal buffer object mechanisms. This does mean that if an
35 * application is using many sync objects, it will emit small batchbuffers
36 * which may end up being a significant overhead. In other tests of removing
37 * gratuitous batchbuffer syncs in Mesa, it hasn't appeared to be a significant
38 * performance bottleneck, though.
41 #include "main/imports.h"
43 #include "brw_context.h"
44 #include "intel_batchbuffer.h"
45 #include "intel_reg.h"
47 static struct gl_sync_object *
48 intel_new_sync_object(struct gl_context *ctx, GLuint id)
50 struct intel_sync_object *sync;
52 sync = calloc(1, sizeof(struct intel_sync_object));
58 intel_delete_sync_object(struct gl_context *ctx, struct gl_sync_object *s)
60 struct intel_sync_object *sync = (struct intel_sync_object *)s;
62 drm_intel_bo_unreference(sync->bo);
67 intel_fence_sync(struct gl_context *ctx, struct gl_sync_object *s,
68 GLenum condition, GLbitfield flags)
70 struct brw_context *brw = brw_context(ctx);
71 struct intel_sync_object *sync = (struct intel_sync_object *)s;
73 assert(condition == GL_SYNC_GPU_COMMANDS_COMPLETE);
74 intel_batchbuffer_emit_mi_flush(brw);
76 sync->bo = brw->batch.bo;
77 drm_intel_bo_reference(sync->bo);
79 intel_batchbuffer_flush(brw);
82 static void intel_client_wait_sync(struct gl_context *ctx, struct gl_sync_object *s,
83 GLbitfield flags, GLuint64 timeout)
85 struct intel_sync_object *sync = (struct intel_sync_object *)s;
87 if (sync->bo && drm_intel_gem_bo_wait(sync->bo, timeout) == 0) {
89 drm_intel_bo_unreference(sync->bo);
94 /* We have nothing to do for WaitSync. Our GL command stream is sequential,
95 * so given that the sync object has already flushed the batchbuffer,
96 * any batchbuffers coming after this waitsync will naturally not occur until
97 * the previous one is done.
99 static void intel_server_wait_sync(struct gl_context *ctx, struct gl_sync_object *s,
100 GLbitfield flags, GLuint64 timeout)
104 static void intel_check_sync(struct gl_context *ctx, struct gl_sync_object *s)
106 struct intel_sync_object *sync = (struct intel_sync_object *)s;
108 if (sync->bo && !drm_intel_bo_busy(sync->bo)) {
109 drm_intel_bo_unreference(sync->bo);
115 void intel_init_syncobj_functions(struct dd_function_table *functions)
117 functions->NewSyncObject = intel_new_sync_object;
118 functions->DeleteSyncObject = intel_delete_sync_object;
119 functions->FenceSync = intel_fence_sync;
120 functions->CheckSync = intel_check_sync;
121 functions->ClientWaitSync = intel_client_wait_sync;
122 functions->ServerWaitSync = intel_server_wait_sync;