[PATCH v2 1/2] drm/i915/get_params: Add GuC status to getparams

[Peter Antoine <peter.antoine@intel.com>]

This patch returns the GuC status to the caller. It is used so
that the userspace knows if the GuC has been loaded.

Signed-off-by: Peter Antoine <peter.antoine@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c         |  4 ++++
 drivers/gpu/drm/i915/intel_guc.h        |  2 +-
 drivers/gpu/drm/i915/intel_guc_loader.c | 19 +++++++++++++++++++
 include/uapi/drm/i915_drm.h             |  1 +
 4 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 499a6ff..c8fc3d0 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -49,6 +49,7 @@
 #include "i915_trace.h"
 #include "i915_vgpu.h"
 #include "intel_drv.h"
+#include "intel_guc.h"
 
 static struct drm_driver driver;
 
@@ -354,6 +355,9 @@ static int i915_getparam(struct drm_device *dev, void *data,
 	case I915_PARAM_MIN_EU_IN_POOL:
 		value = INTEL_INFO(dev)->min_eu_in_pool;
 		break;
+	case I915_PARAM_HAS_GUC:
+		value = intel_is_guc_valid(dev);
+		break;
 	default:
 		DRM_DEBUG("Unknown parameter %d\n", param->param);
 		return -EINVAL;
diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h
index efddaed..5e8bb1e 100644
--- a/drivers/gpu/drm/i915/intel_guc.h
+++ b/drivers/gpu/drm/i915/intel_guc.h
@@ -166,5 +166,5 @@ int i915_guc_submission_enable(struct drm_i915_private *dev_priv);
 int i915_guc_wq_check_space(struct drm_i915_gem_request *rq);
 void i915_guc_submission_disable(struct drm_i915_private *dev_priv);
 void i915_guc_submission_fini(struct drm_i915_private *dev_priv);
-
+int intel_is_guc_valid(struct drm_device *dev);
 #endif
diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
index e24847f..e99278f 100644
--- a/drivers/gpu/drm/i915/intel_guc_loader.c
+++ b/drivers/gpu/drm/i915/intel_guc_loader.c
@@ -782,3 +782,22 @@ void intel_guc_fini(struct drm_device *dev)
 
 	guc_fw->fetch_status = UC_FIRMWARE_NONE;
 }
+
+/**
+ * intel_is_guc_valid() - Check to see if the GuC is fully loaded.
+ * @dev:	drm dedvice to check.
+ *
+ * This function will return true if the guc has been loaded and
+ * has valid firmware.
+ */
+int intel_is_guc_valid(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_uc_fw *guc_fw = &dev_priv->guc.guc_fw;
+
+	if (guc_fw->load_status == UC_FIRMWARE_SUCCESS)
+		return 1;
+	else
+		return 0;
+}
+
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 452629d..ff8ce86 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -387,6 +387,7 @@ typedef struct drm_i915_irq_wait {
 #define I915_PARAM_HAS_EXEC_SOFTPIN	 37
 #define I915_PARAM_HAS_POOLED_EU	 38
 #define I915_PARAM_MIN_EU_IN_POOL	 39
+#define I915_PARAM_HAS_GUC			41
 
 typedef struct drm_i915_getparam {
 	__s32 param;
-- 
1.9.1

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