nv50: remove vtxbuf stateobject after a referenced vtxbuf is mapped

- This avoids problematic "reloc'ed while mapped" messages and
some associated corruption as well.

Signed-off-by: Maarten Maathuis <madman2003@gmail.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/gallium/drivers/nv50/nv50_screen.c b/src/gallium/drivers/nv50/nv50_screen.c
index 7e039ea82e..1778a74517 100644
--- a/src/gallium/drivers/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nv50/nv50_screen.c
@@ -189,6 +189,28 @@ nv50_screen_destroy(struct pipe_screen *pscreen)
 	FREE(screen);
 }
 
+static int
+nv50_pre_pipebuffer_map(struct pipe_screen *pscreen, struct pipe_buffer *pb,
+	unsigned usage)
+{
+	struct nv50_screen *screen = nv50_screen(pscreen);
+	struct nv50_context *ctx = screen->cur_ctx;
+
+	if (!(pb->usage & PIPE_BUFFER_USAGE_VERTEX))
+		return 0;
+
+	/* Our vtxbuf got mapped, it can no longer be considered part of current
+	 * state, remove it to avoid emitting reloc markers.
+	 */
+	if (ctx && ctx->state.vtxbuf && so_bo_is_reloc(ctx->state.vtxbuf,
+			nouveau_bo(pb))) {
+		so_ref(NULL, &ctx->state.vtxbuf);
+		ctx->dirty |= NV50_NEW_ARRAYS;
+	}
+
+	return 0;
+}
+
 struct pipe_screen *
 nv50_screen_create(struct pipe_winsys *ws, struct nouveau_device *dev)
 {
@@ -216,6 +238,7 @@ nv50_screen_create(struct pipe_winsys *ws, struct nouveau_device *dev)
 	pscreen->get_param = nv50_screen_get_param;
 	pscreen->get_paramf = nv50_screen_get_paramf;
 	pscreen->is_format_supported = nv50_screen_is_format_supported;
+	screen->base.pre_pipebuffer_map_callback = nv50_pre_pipebuffer_map;
 
 	nv50_screen_init_miptree_functions(pscreen);
 	nv50_transfer_init_screen_functions(pscreen);