gallium: add indirect compute parameters to pipe_grid_info

Like indirect draw, we need to store a resource and an offset that
needs to be 4 byte aligned. When indirect is used, the size of the
grid (in blocks) is stored with three 32-bit integers.

Changes from v2:
 - s/most values/block sizes/

Signed-off-by: Samuel Pitoiset <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>
Reviewed-by: Ilia Mirkin <[email protected]>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/gallium/include/pipe/p_state.h b/src/gallium/include/pipe/p_state.h
index 5d0ebca1a3f..5209afe4ad6 100644
--- a/src/gallium/include/pipe/p_state.h
+++ b/src/gallium/include/pipe/p_state.h
@@ -704,6 +704,18 @@ struct pipe_grid_info
     * Determine the layout of the grid (in block units) to be used.
     */
    uint grid[3];
+
+   /* Indirect compute parameters resource: If not NULL, block sizes are taken
+    * from this buffer instead, which is laid out as follows:
+    *
+    *  struct {
+    *     uint32_t num_blocks_x;
+    *     uint32_t num_blocks_y;
+    *     uint32_t num_blocks_z;
+    *  };
+    */
+   struct pipe_resource *indirect;
+   unsigned indirect_offset; /**< must be 4 byte aligned */
 };
 
 /**