u_upload_mgr: new features

- Added a parameter to specify a minimum offset that should be returned.
  r300g needs this to better implement user buffer uploads. This weird
  requirement comes from the fact that the Radeon DRM doesn't support negative
  offsets.

- Added a parameter to notify a driver that the upload flush occured.
  A driver may skip buffer validation if there was no flush, resulting
  in a better performance.

- Added a new upload function that returns a pointer to the upload buffer
  directly, so that the buffer can be filled e.g. by the translate module.

1 files changed, 9 insertions, 3 deletions

diff --git a/src/gallium/drivers/i965/brw_draw_upload.c b/src/gallium/drivers/i965/brw_draw_upload.c
index ebeb1e146a..cf9405470c 100644
--- a/src/gallium/drivers/i965/brw_draw_upload.c
+++ b/src/gallium/drivers/i965/brw_draw_upload.c
@@ -89,13 +89,16 @@ static int brw_prepare_vertices(struct brw_context *brw)
 			  vb->buffer->width0 - vb->buffer_offset :
 			  MAX2(vb->buffer->width0 - vb->buffer_offset,
 			       vb->stride * (max_index + 1 - min_index)));
+	 boolean flushed;
 
-	 ret = u_upload_buffer( brw->vb.upload_vertex, 
+	 ret = u_upload_buffer( brw->vb.upload_vertex,
+				0,
 				vb->buffer_offset + min_index * vb->stride,
 				size,
 				vb->buffer,
 				&offset,
-				&upload_buf );
+				&upload_buf,
+				&flushed );
 	 if (ret)
 	    return ret;
 
@@ -251,13 +254,16 @@ static int brw_prepare_indices(struct brw_context *brw)
    /* Turn userbuffer into a proper hardware buffer?
     */
    if (brw_buffer_is_user_buffer(index_buffer)) {
+      boolean flushed;
 
       ret = u_upload_buffer( brw->vb.upload_index,
+                             0,
 			     index_offset,
 			     ib_size,
 			     index_buffer,
 			     &offset,
-			     &upload_buf );
+			     &upload_buf,
+			     &flushed );
       if (ret)
 	 return ret;