[Intel-gfx] drm/i915/slpc: Add parameter unset/set/get functions

[Sagar Arun Kamble]

From: Tom O'Rourke <Tom.O'Rourke at intel.com>

Add slpc_param_id enum values.
Add events for setting/unsetting parameters.

v1: Use host2guc_slpc
    update slcp_param_id enum values for SLPC 2015.2.4
    return void instead of ignored error code (Paulo)

v2: Checkpatch update.

Signed-off-by: Tom O'Rourke <Tom.O'Rourke at intel.com>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
---
 drivers/gpu/drm/i915/intel_slpc.c | 102 ++++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_slpc.h |  29 ++++++++++-
 2 files changed, 130 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_slpc.c b/drivers/gpu/drm/i915/intel_slpc.c
index 637eacb..db912bc 100644
--- a/drivers/gpu/drm/i915/intel_slpc.c
+++ b/drivers/gpu/drm/i915/intel_slpc.c
@@ -65,6 +65,108 @@ static void host2guc_slpc_shutdown(struct drm_i915_private *dev_priv)
 	host2guc_slpc(dev_priv, data, 4);
 }
 
+static void host2guc_slpc_set_param(struct drm_i915_private *dev_priv,
+				    enum slpc_param_id id, u32 value)
+{
+	u32 data[4];
+
+	data[0] = HOST2GUC_ACTION_SLPC_REQUEST;
+	data[1] = SLPC_EVENT(SLPC_EVENT_PARAMETER_SET, 2);
+	data[2] = (u32) id;
+	data[3] = value;
+
+	host2guc_slpc(dev_priv, data, 4);
+}
+
+static void host2guc_slpc_unset_param(struct drm_i915_private *dev_priv,
+				      enum slpc_param_id id)
+{
+	u32 data[3];
+
+	data[0] = HOST2GUC_ACTION_SLPC_REQUEST;
+	data[1] = SLPC_EVENT(SLPC_EVENT_PARAMETER_UNSET, 1);
+	data[2] = (u32) id;
+
+	host2guc_slpc(dev_priv, data, 3);
+}
+
+void intel_slpc_unset_param(struct drm_i915_private *dev_priv,
+			    enum slpc_param_id id)
+{
+	struct drm_i915_gem_object *obj;
+	struct page *page;
+	struct slpc_shared_data *data = NULL;
+
+	obj = dev_priv->guc.slpc.vma->obj;
+	if (obj) {
+		page = i915_gem_object_get_page(obj, 0);
+		if (page)
+			data = kmap_atomic(page);
+	}
+
+	if (data) {
+		data->override_parameters_set_bits[id >> 5]
+							&= (~(1 << (id % 32)));
+		data->override_parameters_values[id] = 0;
+		kunmap_atomic(data);
+
+		host2guc_slpc_unset_param(dev_priv, id);
+	}
+}
+
+void intel_slpc_set_param(struct drm_i915_private *dev_priv,
+			  enum slpc_param_id id,
+			  u32 value)
+{
+	struct drm_i915_gem_object *obj;
+	struct page *page;
+	struct slpc_shared_data *data = NULL;
+
+	obj = dev_priv->guc.slpc.vma->obj;
+	if (obj) {
+		page = i915_gem_object_get_page(obj, 0);
+		if (page)
+			data = kmap_atomic(page);
+	}
+
+	if (data) {
+		data->override_parameters_set_bits[id >> 5]
+							|= (1 << (id % 32));
+		data->override_parameters_values[id] = value;
+		kunmap_atomic(data);
+
+		host2guc_slpc_set_param(dev_priv, id, value);
+	}
+}
+
+void intel_slpc_get_param(struct drm_i915_private *dev_priv,
+			  enum slpc_param_id id,
+			  int *overriding, u32 *value)
+{
+	struct drm_i915_gem_object *obj;
+	struct page *page;
+	struct slpc_shared_data *data = NULL;
+	u32 bits;
+
+	obj = dev_priv->guc.slpc.vma->obj;
+	if (obj) {
+		page = i915_gem_object_get_page(obj, 0);
+		if (page)
+			data = kmap_atomic(page);
+	}
+
+	if (data) {
+		if (overriding) {
+			bits = data->override_parameters_set_bits[id >> 5];
+			*overriding = (0 != (bits & (1 << (id % 32))));
+		}
+		if (value)
+			*value = data->override_parameters_values[id];
+
+		kunmap_atomic(data);
+	}
+}
+
 static unsigned int slpc_get_platform_sku(struct drm_i915_private *dev_priv)
 {
 	enum slpc_platform_sku platform_sku;
diff --git a/drivers/gpu/drm/i915/intel_slpc.h b/drivers/gpu/drm/i915/intel_slpc.h
index 9fe9ae3..018f772 100644
--- a/drivers/gpu/drm/i915/intel_slpc.h
+++ b/drivers/gpu/drm/i915/intel_slpc.h
@@ -69,6 +69,26 @@ enum slpc_event_id {
 #define SLPC_EVENT(id, argc) ((u32) (id) << 8 | (argc))
 #define SLPC_EVENT_STATUS_MASK	0xFF
 
+enum slpc_param_id {
+	SLPC_PARAM_TASK_ENABLE_GTPERF = 0,
+	SLPC_PARAM_TASK_DISABLE_GTPERF = 1,
+	SLPC_PARAM_TASK_ENABLE_BALANCER = 2,
+	SLPC_PARAM_TASK_DISABLE_BALANCER = 3,
+	SLPC_PARAM_TASK_ENABLE_DCC = 4,
+	SLPC_PARAM_TASK_DISABLE_DCC = 5,
+	SLPC_PARAM_GLOBAL_MIN_GT_UNSLICE_FREQ_MHZ = 6,
+	SLPC_PARAM_GLOBAL_MAX_GT_UNSLICE_FREQ_MHZ = 7,
+	SLPC_PARAM_GLOBAL_MIN_GT_SLICE_FREQ_MHZ = 8,
+	SLPC_PARAM_GLOBAL_MAX_GT_SLICE_FREQ_MHZ = 9,
+	SLPC_PARAM_DFPS_THRESHOLD_MAX_FPS = 10,
+	SLPC_PARAM_GLOBAL_DISABLE_GT_FREQ_MANAGEMENT = 11,
+	SLPC_PARAM_DFPS_DISABLE_FRAMERATE_STALLING = 12,
+	SLPC_PARAM_GLOBAL_DISABLE_RC6_MODE_CHANGE = 13,
+	SLPC_PARAM_GLOBAL_OC_UNSLICE_FREQ_MHZ = 14,
+	SLPC_PARAM_GLOBAL_OC_SLICE_FREQ_MHZ = 15,
+	SLPC_PARAM_GLOBAL_DISABLE_IA_GT_BALANCING = 16,
+};
+
 enum slpc_global_state {
 	SLPC_GLOBAL_STATE_NOT_RUNNING = 0,
 	SLPC_GLOBAL_STATE_INITIALIZING = 1,
@@ -150,5 +170,12 @@ void intel_slpc_suspend(struct drm_i915_private *dev_priv);
 void intel_slpc_disable(struct drm_i915_private *dev_priv);
 void intel_slpc_enable(struct drm_i915_private *dev_priv);
 void intel_slpc_reset(struct drm_i915_private *dev_priv);
-
+void intel_slpc_unset_param(struct drm_i915_private *dev_priv,
+			    enum slpc_param_id id);
+void intel_slpc_set_param(struct drm_i915_private *dev_priv,
+			  enum slpc_param_id id,
+			  u32 value);
+void intel_slpc_get_param(struct drm_i915_private *dev_priv,
+			  enum slpc_param_id id,
+			  int *overriding, u32 *value);
 #endif
-- 
1.9.1