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.

2 files changed, 8 insertions, 3 deletions

diff --git a/src/gallium/drivers/svga/svga_draw_elements.c b/src/gallium/drivers/svga/svga_draw_elements.c
index c7ea014bba..83527c6ef4 100644
--- a/src/gallium/drivers/svga/svga_draw_elements.c
+++ b/src/gallium/drivers/svga/svga_draw_elements.c
@@ -120,14 +120,17 @@ svga_hwtnl_simple_draw_range_elements( struct svga_hwtnl *hwtnl,
    if (index_buffer && 
        svga_buffer_is_user_buffer(index_buffer)) 
    {
+      boolean flushed;
       assert( index_buffer->width0 >= index_offset + count * index_size );
 
       ret = u_upload_buffer( hwtnl->upload_ib,
+                             0,
                              index_offset,
                              count * index_size,
                              index_buffer,
                              &index_offset,
-                             &upload_buffer );
+                             &upload_buffer,
+                             &flushed );
       if (ret)
          goto done;
 
diff --git a/src/gallium/drivers/svga/svga_state_vdecl.c b/src/gallium/drivers/svga/svga_state_vdecl.c
index 3af7bf2b35..958d00393f 100644
--- a/src/gallium/drivers/svga/svga_state_vdecl.c
+++ b/src/gallium/drivers/svga/svga_state_vdecl.c
@@ -57,12 +57,14 @@ upload_user_buffers( struct svga_context *svga )
          struct svga_buffer *buffer = svga_buffer(svga->curr.vb[i].buffer);
 
          if (!buffer->uploaded.buffer) {
+            boolean flushed;
             ret = u_upload_buffer( svga->upload_vb,
-                                   0,
+                                   0, 0,
                                    buffer->b.b.width0,
                                    &buffer->b.b,
                                    &buffer->uploaded.offset,
-                                   &buffer->uploaded.buffer );
+                                   &buffer->uploaded.buffer,
+                                   &flushed);
             if (ret)
                return ret;