eg/compute: Use reference counting to handle compute memory pool.

Use pipe_reference to release old RAT surfaces.
RAT surface adds a reference to pool bo, so use reference counting for pool->bo
as well.

v2: Use the same pattern for both defrag paths
    Drop confusing comment

CC: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
Reviewed-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/gallium/drivers/r600/compute_memory_pool.c b/src/gallium/drivers/r600/compute_memory_pool.c
index bcda155..4b0e004 100644 (file)
--- a/src/gallium/drivers/r600/compute_memory_pool.c
+++ b/src/gallium/drivers/r600/compute_memory_pool.c
@@ -91,10 +91,7 @@ void compute_memory_pool_delete(struct compute_memory_pool* pool)
 {
        COMPUTE_DBG(pool->screen, "* compute_memory_pool_delete()\n");
        free(pool->shadow);
-       if (pool->bo) {
-               pool->screen->b.b.resource_destroy((struct pipe_screen *)
-                       pool->screen, (struct pipe_resource *)pool->bo);
-       }
+       pipe_resource_reference(&pool->bo, NULL);
        /* In theory, all of the items were freed in compute_memory_free.
         * Just delete the list heads
         */
@@ -213,10 +210,8 @@ int compute_memory_grow_defrag_pool(struct compute_memory_pool *pool,
 
                        compute_memory_defrag(pool, src, dst, pipe);
 
-                       pool->screen->b.b.resource_destroy(
-                                       (struct pipe_screen *)pool->screen,
-                                       src);
-
+                       /* Release the old buffer */
+                       pipe_resource_reference(&pool->bo, NULL);
                        pool->bo = temp;
                        pool->size_in_dw = new_size_in_dw;
                }
@@ -230,9 +225,8 @@ int compute_memory_grow_defrag_pool(struct compute_memory_pool *pool,
                                return -1;
 
                        pool->size_in_dw = new_size_in_dw;
-                       pool->screen->b.b.resource_destroy(
-                                       (struct pipe_screen *)pool->screen,
-                                       (struct pipe_resource *)pool->bo);
+                       /* Release the old buffer */
+                       pipe_resource_reference(&pool->bo, NULL);
                        pool->bo = r600_compute_buffer_alloc_vram(pool->screen, pool->size_in_dw * 4);
                        compute_memory_shadow(pool, pipe, 0);
 

diff --git a/src/gallium/drivers/r600/evergreen_compute.c b/src/gallium/drivers/r600/evergreen_compute.c
index bd3d893..8c81870 100644 (file)
--- a/src/gallium/drivers/r600/evergreen_compute.c
+++ b/src/gallium/drivers/r600/evergreen_compute.c
@@ -122,7 +122,8 @@ static void evergreen_set_rat(struct r600_pipe_compute *pipe,
        rat_templ.u.tex.first_layer = 0;
        rat_templ.u.tex.last_layer = 0;
 
-       /* Add the RAT the list of color buffers */
+       /* Add the RAT the list of color buffers. Drop the old buffer first. */
+       pipe_surface_reference(&pipe->ctx->framebuffer.state.cbufs[id], NULL);
        pipe->ctx->framebuffer.state.cbufs[id] = pipe->ctx->b.b.create_surface(
                (struct pipe_context *)pipe->ctx,
                (struct pipe_resource *)bo, &rat_templ);