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authorEric Anholt <eric@anholt.net>2009-09-01 12:20:10 -0700
committerIan Romanick <ian.d.romanick@intel.com>2009-09-03 11:22:47 -0700
commitafd6141934a0fb52fc1739a2a9992db3ac34682b (patch)
treeaaced01f3942d787da48ff12c5936bd7cac39e9d /src/mesa/drivers/dri/intel
parentaee282faa74ea862064b91d847ddc279d2191b01 (diff)
intel: Add support for ARB_sync.
We currently weasel out of supporting the timeout parameter, but otherwise this extension looks ready, and should make the common case happy.
Diffstat (limited to 'src/mesa/drivers/dri/intel')
-rw-r--r--src/mesa/drivers/dri/intel/intel_context.c1
-rw-r--r--src/mesa/drivers/dri/intel/intel_context.h8
-rw-r--r--src/mesa/drivers/dri/intel/intel_extensions.c2
-rw-r--r--src/mesa/drivers/dri/intel/intel_syncobj.c132
4 files changed, 143 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c
index ec96747f05..89f99f7ffd 100644
--- a/src/mesa/drivers/dri/intel/intel_context.c
+++ b/src/mesa/drivers/dri/intel/intel_context.c
@@ -598,6 +598,7 @@ intelInitDriverFunctions(struct dd_function_table *functions)
intelInitBufferFuncs(functions);
intelInitPixelFuncs(functions);
intelInitBufferObjectFuncs(functions);
+ intel_init_syncobj_functions(functions);
}
diff --git a/src/mesa/drivers/dri/intel/intel_context.h b/src/mesa/drivers/dri/intel/intel_context.h
index 0d9db5eb1d..03e7cf39d6 100644
--- a/src/mesa/drivers/dri/intel/intel_context.h
+++ b/src/mesa/drivers/dri/intel/intel_context.h
@@ -80,6 +80,12 @@ extern void intelFallback(struct intel_context *intel, GLuint bit,
#define INTEL_MAX_FIXUP 64
+struct intel_sync_object {
+ struct gl_sync_object Base;
+
+ /** Batch associated with this sync object */
+ drm_intel_bo *bo;
+};
/**
* intel_context is derived from Mesa's context class: GLcontext.
@@ -470,6 +476,8 @@ extern void intelFlush(GLcontext * ctx);
extern void intelInitDriverFunctions(struct dd_function_table *functions);
+void intel_init_syncobj_functions(struct dd_function_table *functions);
+
/* ================================================================
* intel_state.c:
diff --git a/src/mesa/drivers/dri/intel/intel_extensions.c b/src/mesa/drivers/dri/intel/intel_extensions.c
index 7aee70f0a8..2e61c556d8 100644
--- a/src/mesa/drivers/dri/intel/intel_extensions.c
+++ b/src/mesa/drivers/dri/intel/intel_extensions.c
@@ -36,6 +36,7 @@
#define need_GL_ARB_occlusion_query
#define need_GL_ARB_point_parameters
#define need_GL_ARB_shader_objects
+#define need_GL_ARB_sync
#define need_GL_ARB_vertex_array_object
#define need_GL_ARB_vertex_program
#define need_GL_ARB_vertex_shader
@@ -77,6 +78,7 @@ static const struct dri_extension card_extensions[] = {
{ "GL_ARB_multitexture", NULL },
{ "GL_ARB_point_parameters", GL_ARB_point_parameters_functions },
{ "GL_ARB_point_sprite", NULL },
+ { "GL_ARB_sync", GL_ARB_sync_functions },
{ "GL_ARB_texture_border_clamp", NULL },
{ "GL_ARB_texture_cube_map", NULL },
{ "GL_ARB_texture_env_add", NULL },
diff --git a/src/mesa/drivers/dri/intel/intel_syncobj.c b/src/mesa/drivers/dri/intel/intel_syncobj.c
new file mode 100644
index 0000000000..d447b6a0fa
--- /dev/null
+++ b/src/mesa/drivers/dri/intel/intel_syncobj.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright © 2008 Intel Corporation
+ *
+ * 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:
+ * Eric Anholt <eric@anholt.net>
+ *
+ */
+
+/** @file intel_syncobj.c
+ *
+ * Support for ARB_sync
+ *
+ * ARB_sync is implemented by flushing the current batchbuffer and keeping a
+ * reference on it. We can then check for completion or wait for compeltion
+ * using the normal buffer object mechanisms. This does mean that if an
+ * application is using many sync objects, it will emit small batchbuffers
+ * which may end up being a significant overhead. In other tests of removing
+ * gratuitous batchbuffer syncs in Mesa, it hasn't appeared to be a significant
+ * performance bottleneck, though.
+ */
+
+#include "main/simple_list.h"
+#include "main/imports.h"
+
+#include "intel_context.h"
+#include "intel_batchbuffer.h"
+#include "intel_reg.h"
+
+static struct gl_sync_object *
+intel_new_sync_object(GLcontext *ctx, GLuint id)
+{
+ struct intel_sync_object *sync;
+
+ sync = _mesa_calloc(sizeof(struct intel_sync_object));
+
+ return &sync->Base;
+}
+
+static void
+intel_delete_sync_object(GLcontext *ctx, struct gl_sync_object *s)
+{
+ struct intel_sync_object *sync = (struct intel_sync_object *)s;
+
+ drm_intel_bo_unreference(sync->bo);
+ _mesa_free(sync);
+}
+
+static void
+intel_fence_sync(GLcontext *ctx, struct gl_sync_object *s,
+ GLenum condition, GLbitfield flags)
+{
+ struct intel_context *intel = intel_context(ctx);
+ struct intel_sync_object *sync = (struct intel_sync_object *)s;
+
+ assert(condition == GL_SYNC_GPU_COMMANDS_COMPLETE);
+ intel_batchbuffer_emit_mi_flush(intel->batch);
+
+ sync->bo = intel->batch->buf;
+ drm_intel_bo_reference(sync->bo);
+
+ intelFlush(ctx);
+}
+
+/* We ignore the user-supplied timeout. This is weaselly -- we're allowed to
+ * round to an implementation-dependent accuracy, and right now our
+ * implementation "rounds" to the wait-forever value.
+ *
+ * The fix would be a new kernel function to do the GTT transition with a
+ * timeout.
+ */
+static void intel_client_wait_sync(GLcontext *ctx, struct gl_sync_object *s,
+ GLbitfield flags, GLuint64 timeout)
+{
+ struct intel_sync_object *sync = (struct intel_sync_object *)s;
+
+ if (sync->bo) {
+ drm_intel_bo_wait_rendering(sync->bo);
+ s->Status = 1;
+ drm_intel_bo_unreference(sync->bo);
+ sync->bo = NULL;
+ }
+}
+
+/* We have nothing to do for WaitSync. Our GL command stream is sequential,
+ * so given that the sync object has already flushed the batchbuffer,
+ * any batchbuffers coming after this waitsync will naturally not occur until
+ * the previous one is done.
+ */
+static void intel_server_wait_sync(GLcontext *ctx, struct gl_sync_object *s,
+ GLbitfield flags, GLuint64 timeout)
+{
+}
+
+static void intel_check_sync(GLcontext *ctx, struct gl_sync_object *s)
+{
+ struct intel_sync_object *sync = (struct intel_sync_object *)s;
+
+ if (sync->bo && drm_intel_bo_busy(sync->bo)) {
+ drm_intel_bo_unreference(sync->bo);
+ sync->bo = NULL;
+ s->Status = 1;
+ }
+}
+
+void intel_init_syncobj_functions(struct dd_function_table *functions)
+{
+ functions->NewSyncObject = intel_new_sync_object;
+ functions->DeleteSyncObject = intel_delete_sync_object;
+ functions->FenceSync = intel_fence_sync;
+ functions->CheckSync = intel_check_sync;
+ functions->ClientWaitSync = intel_client_wait_sync;
+ functions->ServerWaitSync = intel_server_wait_sync;
+}