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, 3 insertions, 2 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_urb.c b/src/mesa/drivers/dri/i965/brw_urb.c
index cf805cef28..4b038388e0 100644
--- a/src/mesa/drivers/dri/i965/brw_urb.c
+++ b/src/mesa/drivers/dri/i965/brw_urb.c
@@ -74,7 +74,7 @@ static GLboolean check_urb_layout( struct brw_context *brw )
 /* Most minimal update, forces re-emit of URB fence packet after GS
  * unit turned on/off.
  */
-static void recalculate_urb_fence( struct brw_context *brw )
+static int recalculate_urb_fence( struct brw_context *brw )
 {
    GLuint csize = brw->curbe.total_size;
    GLuint vsize = brw->vs.prog_data->urb_entry_size;
@@ -142,6 +142,7 @@ static void recalculate_urb_fence( struct brw_context *brw )
       
       brw->state.dirty.brw |= BRW_NEW_URB_FENCE;
    }
+   return 0;
 }
 
 
@@ -152,7 +153,7 @@ const struct brw_tracked_state brw_recalculate_urb_fence = {
       .cache = (CACHE_NEW_VS_PROG |
 		CACHE_NEW_SF_PROG)
    },
-   .update = recalculate_urb_fence
+   .prepare = recalculate_urb_fence
 };