There is still one assignment to 'type' in nvc0_query.c at line 246 which needs to be removed.

On 11/13/2015 08:17 PM, Nicolai Hähnle wrote:
This was only used to implement an unnecessarily restrictive interpretation
of the spec of AMD_performance_monitor. The spec says

   A performance monitor consists of a number of hardware and software
   counters that can be sampled by the GPU and reported back to the
   application.

I guess one could take this as a requirement that counters _must_ be sampled
by the GPU, but then why are they called _software_ counters? Besides,
there's not much reason _not_ to expose all counters that are available,
and this simplifies the code.
---
  src/gallium/drivers/nouveau/nvc0/nvc0_query.c |  3 ---
  src/gallium/include/pipe/p_defines.h          |  7 -------
  src/mesa/state_tracker/st_cb_perfmon.c        | 30 ---------------------------
  3 files changed, 40 deletions(-)

diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_query.c 
b/src/gallium/drivers/nouveau/nvc0/nvc0_query.c
index f539210..a1d6162 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_query.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_query.c
@@ -200,7 +200,6 @@ nvc0_screen_get_driver_query_group_info(struct pipe_screen 
*pscreen,
     if (id == NVC0_HW_SM_QUERY_GROUP) {
        if (screen->compute) {
           info->name = "MP counters";
-         info->type = PIPE_DRIVER_QUERY_GROUP_TYPE_GPU;

           /* Because we can't expose the number of hardware counters needed for
            * each different query, we don't want to allow more than one active
@@ -224,7 +223,6 @@ nvc0_screen_get_driver_query_group_info(struct pipe_screen 
*pscreen,
        if (screen->compute) {
           if (screen->base.class_3d < NVE4_3D_CLASS) {
              info->name = "Performance metrics";
-            info->type = PIPE_DRIVER_QUERY_GROUP_TYPE_GPU;
              info->max_active_queries = 1;
              info->num_queries = NVC0_HW_METRIC_QUERY_COUNT;
              return 1;
@@ -234,7 +232,6 @@ nvc0_screen_get_driver_query_group_info(struct pipe_screen 
*pscreen,
  #ifdef NOUVEAU_ENABLE_DRIVER_STATISTICS
     else if (id == NVC0_SW_QUERY_DRV_STAT_GROUP) {
        info->name = "Driver statistics";
-      info->type = PIPE_DRIVER_QUERY_GROUP_TYPE_CPU;
        info->max_active_queries = NVC0_SW_QUERY_DRV_STAT_COUNT;
        info->num_queries = NVC0_SW_QUERY_DRV_STAT_COUNT;
        return 1;
diff --git a/src/gallium/include/pipe/p_defines.h 
b/src/gallium/include/pipe/p_defines.h
index 7240154..7f241c8 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -829,12 +829,6 @@ enum pipe_driver_query_type
     PIPE_DRIVER_QUERY_TYPE_HZ           = 6,
  };

-enum pipe_driver_query_group_type
-{
-   PIPE_DRIVER_QUERY_GROUP_TYPE_CPU = 0,
-   PIPE_DRIVER_QUERY_GROUP_TYPE_GPU = 1,
-};
-
  /* Whether an average value per frame or a cumulative value should be
   * displayed.
   */
@@ -864,7 +858,6 @@ struct pipe_driver_query_info
  struct pipe_driver_query_group_info
  {
     const char *name;
-   enum pipe_driver_query_group_type type;
     unsigned max_active_queries;
     unsigned num_queries;
  };
diff --git a/src/mesa/state_tracker/st_cb_perfmon.c 
b/src/mesa/state_tracker/st_cb_perfmon.c
index 1bb5be3..4ec6d86 100644
--- a/src/mesa/state_tracker/st_cb_perfmon.c
+++ b/src/mesa/state_tracker/st_cb_perfmon.c
@@ -65,27 +65,6 @@ find_query_type(struct pipe_screen *screen, const char *name)
     return type;
  }

-/**
- * Return TRUE if the underlying driver expose GPU counters.
- */
-static bool
-has_gpu_counters(struct pipe_screen *screen)
-{
-   int num_groups, gid;
-
-   num_groups = screen->get_driver_query_group_info(screen, 0, NULL);
-   for (gid = 0; gid < num_groups; gid++) {
-      struct pipe_driver_query_group_info group_info;
-
-      if (!screen->get_driver_query_group_info(screen, gid, &group_info))
-         continue;
-
-      if (group_info.type == PIPE_DRIVER_QUERY_GROUP_TYPE_GPU)
-         return true;
-   }
-   return false;
-}
-
  static bool
  init_perf_monitor(struct gl_context *ctx, struct gl_perf_monitor_object *m)
  {
@@ -313,12 +292,6 @@ st_init_perfmon(struct st_context *st)
     if (!screen->get_driver_query_info || !screen->get_driver_query_group_info)
        return false;

-   if (!has_gpu_counters(screen)) {
-      /* According to the spec, GL_AMD_performance_monitor must only
-       * expose GPU counters. */
-      return false;
-   }
-
     /* Get the number of available queries. */
     num_counters = screen->get_driver_query_info(screen, 0, NULL);
     if (!num_counters)
@@ -339,9 +312,6 @@ st_init_perfmon(struct st_context *st)
        if (!screen->get_driver_query_group_info(screen, gid, &group_info))
           continue;

-      if (group_info.type != PIPE_DRIVER_QUERY_GROUP_TYPE_GPU)
-         continue;
-
        g->Name = group_info.name;
        g->MaxActiveCounters = group_info.max_active_queries;
        g->NumCounters = 0;

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