i965: Store the command parser version number in intel_screen

In order to detect whether the predicate source registers can be used
in a later patch we will need to know the version number for the
command parser. This patch just adds a member to intel_screen and does
an ioctl to get the version.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

2 files changed, 14 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index dda16389f8a..896a12534e6 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -1407,6 +1407,13 @@ __DRIconfig **intelInitScreen2(__DRIscreen *psp)
          (ret != -1 || errno != EINVAL);
    }
 
+   struct drm_i915_getparam getparam;
+   getparam.param = I915_PARAM_CMD_PARSER_VERSION;
+   getparam.value = &intelScreen->cmd_parser_version;
+   const int ret = drmIoctl(psp->fd, DRM_IOCTL_I915_GETPARAM, &getparam);
+   if (ret == -1)
+      intelScreen->cmd_parser_version = 0;
+
    psp->extensions = !intelScreen->has_context_reset_notification
       ? intelScreenExtensions : intelRobustScreenExtensions;
 
diff --git a/src/mesa/drivers/dri/i965/intel_screen.h b/src/mesa/drivers/dri/i965/intel_screen.h
index e7a14903d6e..742b3d30eee 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.h
+++ b/src/mesa/drivers/dri/i965/intel_screen.h
@@ -72,7 +72,13 @@ struct intel_screen
    * Configuration cache with default values for all contexts
    */
    driOptionCache optionCache;
-};
+
+   /**
+    * Version of the command parser reported by the
+    * I915_PARAM_CMD_PARSER_VERSION parameter
+    */
+   int cmd_parser_version;
+ };
 
 extern void intelDestroyContext(__DRIcontext * driContextPriv);