Mesa (master): nouveau/vieux: finish != flush, how about we do that..

[Ben Skeggs]

Module: Mesa
Branch: master
Commit: 666004148353fa46e818772e496f6d09bd979737
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=666004148353fa46e818772e496f6d09bd979737

Author: Ben Skeggs <bskeggs at redhat.com>
Date:   Fri May 11 03:02:13 2012 +1000

nouveau/vieux: finish != flush, how about we do that..

Signed-off-by: Ben Skeggs <bskeggs at redhat.com>

---

 src/mesa/drivers/dri/nouveau/nouveau_context.c |    8 ++++++++
 src/mesa/drivers/dri/nouveau/nouveau_context.h |    2 ++
 src/mesa/drivers/dri/nouveau/nouveau_driver.c  |   13 +++++++++++++
 3 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/dri/nouveau/nouveau_context.c b/src/mesa/drivers/dri/nouveau/nouveau_context.c
index 2625b76..d7d5a04 100644
--- a/src/mesa/drivers/dri/nouveau/nouveau_context.c
+++ b/src/mesa/drivers/dri/nouveau/nouveau_context.c
@@ -83,6 +83,13 @@ nouveau_context_create(gl_api api,
 	   return GL_FALSE;
 	}
 
+	if (nouveau_bo_new(context_dev(ctx), NOUVEAU_BO_VRAM, 0, 4096,
+			   NULL, &nctx->fence)) {
+		nouveau_context_destroy(dri_ctx);
+		*error = __DRI_CTX_ERROR_NO_MEMORY;
+		return GL_FALSE;
+	}
+
 	*error = __DRI_CTX_ERROR_SUCCESS;
 	return GL_TRUE;
 }
@@ -209,6 +216,7 @@ nouveau_context_destroy(__DRIcontext *dri_ctx)
 	struct nouveau_context *nctx = dri_ctx->driverPrivate;
 	struct gl_context *ctx = &nctx->base;
 
+	nouveau_bo_ref(NULL, &nctx->fence);
 	context_drv(ctx)->context_destroy(ctx);
 }
 
diff --git a/src/mesa/drivers/dri/nouveau/nouveau_context.h b/src/mesa/drivers/dri/nouveau/nouveau_context.h
index 8bba51e..2bcc1e1 100644
--- a/src/mesa/drivers/dri/nouveau/nouveau_context.h
+++ b/src/mesa/drivers/dri/nouveau/nouveau_context.h
@@ -72,6 +72,8 @@ struct nouveau_context {
 	BITSET_DECLARE(dirty, MAX_NOUVEAU_STATE);
 	enum nouveau_fallback fallback;
 
+	struct nouveau_bo *fence;
+
 	struct nouveau_hw_state hw;
 	struct nouveau_render_state render;
 	struct nouveau_scratch_state scratch;
diff --git a/src/mesa/drivers/dri/nouveau/nouveau_driver.c b/src/mesa/drivers/dri/nouveau/nouveau_driver.c
index 69e5cac..e824d10 100644
--- a/src/mesa/drivers/dri/nouveau/nouveau_driver.c
+++ b/src/mesa/drivers/dri/nouveau/nouveau_driver.c
@@ -76,7 +76,20 @@ nouveau_flush(struct gl_context *ctx)
 static void
 nouveau_finish(struct gl_context *ctx)
 {
+	struct nouveau_context *nctx = to_nouveau_context(ctx);
+	struct nouveau_pushbuf *push = context_push(ctx);
+	struct nouveau_pushbuf_refn refn =
+		{ nctx->fence, NOUVEAU_BO_VRAM | NOUVEAU_BO_RDWR };
+
 	nouveau_flush(ctx);
+
+	if (!nouveau_pushbuf_space(push, 16, 0, 0) &&
+	    !nouveau_pushbuf_refn(push, &refn, 1)) {
+		PUSH_DATA(push, 0);
+		PUSH_KICK(push);
+	}
+
+	nouveau_bo_wait(nctx->fence, NOUVEAU_BO_RDWR, context_client(ctx));
 }
 
 void