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]>

3 files changed, 35 insertions, 0 deletions

diff --git a/src/gallium/docs/source/screen.rst b/src/gallium/docs/source/screen.rst
index 4386bcfb5ac..68931cf3519 100644
--- a/src/gallium/docs/source/screen.rst
+++ b/src/gallium/docs/source/screen.rst
@@ -588,3 +588,13 @@ query at the specified **index** is returned in **info**.
 The function returns non-zero on success.
 The driver-specific query is described with the pipe_driver_query_info
 structure.
+
+get_driver_query_group_info
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Return a driver-specific query group. If the **info** parameter is NULL,
+the number of available groups is returned.  Otherwise, the driver
+query group at the specified **index** is returned in **info**.
+The function returns non-zero on success.
+The driver-specific query group is described with the
+pipe_driver_query_group_info structure.
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 67f48e42936..c1e660e899c 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -752,6 +752,12 @@ union pipe_color_union
    unsigned int ui[4];
 };
 
+enum pipe_driver_query_group_type
+{
+   PIPE_DRIVER_QUERY_GROUP_TYPE_CPU = 0,
+   PIPE_DRIVER_QUERY_GROUP_TYPE_GPU = 1,
+};
+
 struct pipe_driver_query_info
 {
    const char *name;
@@ -760,6 +766,14 @@ struct pipe_driver_query_info
    boolean uses_byte_units; /* whether the result is in bytes */
 };
 
+struct pipe_driver_query_group_info
+{
+   const char *name;
+   enum pipe_driver_query_group_type type;
+   unsigned max_active_queries;
+   unsigned num_queries;
+};
+
 #ifdef __cplusplus
 }
 #endif
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);
+
 };