i965: initial attempt at fixing the aperture overflow

Makes state emission into a 2 phase, prepare sets things up and accounts
the size of all referenced buffer objects. The emit stage then actually
does the batchbuffer touching for emitting the objects.

There is an assert in dri_emit_reloc if a reloc occurs for a buffer
that hasn't been accounted yet.

1 files changed, 9 insertions, 3 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_wm_state.c b/src/mesa/drivers/dri/i965/brw_wm_state.c
index 4b9d7aac1b3..f4da0f279e3 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_state.c
@@ -227,12 +227,12 @@ wm_unit_create_from_key(struct brw_context *brw, struct brw_wm_unit_key *key,
 }
 
 
-static void upload_wm_unit( struct brw_context *brw )
+static int upload_wm_unit( struct brw_context *brw )
 {
    struct intel_context *intel = &brw->intel;
    struct brw_wm_unit_key key;
    dri_bo *reloc_bufs[3];
-
+   int ret = 0, i;
    wm_unit_populate_key(brw, &key);
 
    /* Allocate the necessary scratch space if we haven't already.  Don't
@@ -267,6 +267,12 @@ static void upload_wm_unit( struct brw_context *brw )
    if (brw->wm.state_bo == NULL) {
       brw->wm.state_bo = wm_unit_create_from_key(brw, &key, reloc_bufs);
    }
+
+   for (i = 0; i < 3; i++)
+     if (reloc_bufs[i])
+       ret |= dri_bufmgr_check_aperture_space(reloc_bufs[i]);
+   ret |= dri_bufmgr_check_aperture_space(brw->wm.state_bo);
+   return ret;
 }
 
 const struct brw_tracked_state brw_wm_unit = {
@@ -284,6 +290,6 @@ const struct brw_tracked_state brw_wm_unit = {
 		CACHE_NEW_WM_PROG | 
 		CACHE_NEW_SAMPLER)
    },
-   .update = upload_wm_unit,
+   .prepare = upload_wm_unit,
 };