[RFC PATCH] drm/i915: Add GETPARAM for GuC submission version

[Joonas Lahtinen]

Add reporting of the GuC submissio/VF interface version via GETPARAM
properties. Mesa intends to use this information to check for old
firmware versions with known bugs before enabling features like async
compute.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Kenneth Graunke <kenneth at whitecape.org>
Cc: Jose Souza <jose.souza at intel.com>
Cc: Sagar Ghuge <sagar.ghuge at intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
Cc: John Harrison <John.C.Harrison at Intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: Jani Nikula <jani.nikula at intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 drivers/gpu/drm/i915/i915_getparam.c | 12 ++++++++++++
 include/uapi/drm/i915_drm.h          | 13 +++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_getparam.c b/drivers/gpu/drm/i915/i915_getparam.c
index 5c3fec63cb4c1..f176372debc54 100644
--- a/drivers/gpu/drm/i915/i915_getparam.c
+++ b/drivers/gpu/drm/i915/i915_getparam.c
@@ -113,6 +113,18 @@ int i915_getparam_ioctl(struct drm_device *dev, void *data,
 		if (value < 0)
 			return value;
 		break;
+	case I915_PARAM_GUC_SUBMISSION_VERSION_MAJOR:
+	case I915_PARAM_GUC_SUBMISSION_VERSION_MINOR:
+	case I915_PARAM_GUC_SUBMISSION_VERSION_PATCH:
+		if (!intel_uc_uses_guc_submission(&to_gt(i915)->uc))
+			return -ENODEV;
+		if (param->param == I915_PARAM_GUC_SUBMISSION_VERSION_MAJOR)
+			value = to_gt(i915)->uc.guc.submission_version.major;
+		else if (param->param == I915_PARAM_GUC_SUBMISSION_VERSION_MINOR)
+			value = to_gt(i915)->uc.guc.submission_version.minor;
+		else
+			value = to_gt(i915)->uc.guc.submission_version.patch;
+		break;
 	case I915_PARAM_MMAP_GTT_VERSION:
 		/* Though we've started our numbering from 1, and so class all
 		 * earlier versions as 0, in effect their value is undefined as
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index fd4f9574d177a..7d5a47f182542 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -806,6 +806,19 @@ typedef struct drm_i915_irq_wait {
  */
 #define I915_PARAM_PXP_STATUS		 58
 
+/*
+ * Query for the GuC submission/VF interface version number
+ *
+ * -ENODEV is returned if GuC submission is not used
+ *
+ * On success, returns the respective GuC submission/VF interface major,
+ * minor or patch version as per the requested parameter.
+ *
+ */
+#define I915_PARAM_GUC_SUBMISSION_VERSION_MAJOR 59
+#define I915_PARAM_GUC_SUBMISSION_VERSION_MINOR 60
+#define I915_PARAM_GUC_SUBMISSION_VERSION_PATCH 61
+
 /* Must be kept compact -- no holes and well documented */
 
 /**
-- 
2.43.0