intel: Use PIPE_CONTROL on gen4 hardware for doing pipeline flushing.

This should do all the things that MI_FLUSH did, but it can be pipelined
so that further rendering isn't blocked on the flush completion unless
necessary.

2 files changed, 2 insertions, 21 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c
index 44bb7bd588..8bcb6083f7 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.c
+++ b/src/mesa/drivers/dri/i965/brw_draw.c
@@ -153,18 +153,14 @@ static void brw_emit_prim(struct brw_context *brw,
     * the besides the draw code.
     */
    if (intel->always_flush_cache) {
-      BEGIN_BATCH(1, IGNORE_CLIPRECTS);
-      OUT_BATCH(intel->vtbl.flush_cmd());
-      ADVANCE_BATCH();
+      intel_batchbuffer_emit_mi_flush(intel->batch);
    }
    if (prim_packet.verts_per_instance) {
       intel_batchbuffer_data( brw->intel.batch, &prim_packet,
 			      sizeof(prim_packet), LOOP_CLIPRECTS);
    }
    if (intel->always_flush_cache) {
-      BEGIN_BATCH(1, IGNORE_CLIPRECTS);
-      OUT_BATCH(intel->vtbl.flush_cmd());
-      ADVANCE_BATCH();
+      intel_batchbuffer_emit_mi_flush(intel->batch);
    }
 
    brw->no_batch_wrap = GL_FALSE;
diff --git a/src/mesa/drivers/dri/i965/brw_vtbl.c b/src/mesa/drivers/dri/i965/brw_vtbl.c
index 124fde25fe..114e6bd018 100644
--- a/src/mesa/drivers/dri/i965/brw_vtbl.c
+++ b/src/mesa/drivers/dri/i965/brw_vtbl.c
@@ -175,20 +175,6 @@ static void brw_note_fence( struct intel_context *intel, GLuint fence )
    brw_context(&intel->ctx)->state.dirty.brw |= BRW_NEW_FENCE;
 }
 
-/* called from intelWaitForIdle() and intelFlush()
- *
- * For now, just flush everything.  Could be smarter later.
- */
-static GLuint brw_flush_cmd( void )
-{
-   struct brw_mi_flush flush;
-   flush.opcode = CMD_MI_FLUSH;
-   flush.pad = 0;
-   flush.flags = BRW_FLUSH_STATE_CACHE;
-   return *(GLuint *)&flush;
-}
-
-
 static void brw_invalidate_state( struct intel_context *intel, GLuint new_state )
 {
    /* nothing */
@@ -209,6 +195,5 @@ void brwInitVtbl( struct brw_context *brw )
    brw->intel.vtbl.finish_batch = brw_finish_batch;
    brw->intel.vtbl.destroy = brw_destroy_context;
    brw->intel.vtbl.set_draw_region = brw_set_draw_region;
-   brw->intel.vtbl.flush_cmd = brw_flush_cmd;
    brw->intel.vtbl.debug_batch = brw_debug_batch;
 }