gallium: add pipe_screen::get_driver_query_group_info

Driver queries are organized as a single hierarchy where queries are
categorized into groups. Each group has a list of queries and a maximum
number of queries that can be sampled. The list of available groups can
be obtained using pipe_screen::get_driver_query_group_info.

This will be used by GL_AMD_performance monitor.

v2: add group type (CPU/GPU)

Signed-off-by: Samuel Pitoiset <[email protected]>
Reviewed-by: Martin Peres <[email protected]>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index 21e7dd35ec0..98b2159defe 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -236,6 +236,17 @@ struct pipe_screen {
                                 unsigned index,
                                 struct pipe_driver_query_info *info);
 
+   /**
+    * Returns a driver-specific query group.
+    *
+    * If \p info is NULL, the number of available groups is returned.
+    * Otherwise, the driver query group at the specified \p index is returned
+    * in \p info. The function returns non-zero on success.
+    */
+   int (*get_driver_query_group_info)(struct pipe_screen *screen,
+                                      unsigned index,
+                                      struct pipe_driver_query_group_info *info);
+
 };