[Intel-gfx] [PATCH v2 2/2] drm/i915/guc: Change values for i915_guc_log_control

[Michal Wajdeczko]

Today we have format mismatch between read/write operations
of i915_guc_log_control entry. For read we return (0, 1..4)
that represents disable/verbosity levels, but for write we
force user to follow internal structure format (0,1,9,11,13).
Let's hide internals from the user and accept same values
as we support for read and related guc_log_level modparam.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble at intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_guc_log.c | 27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_guc_log.c b/drivers/gpu/drm/i915/intel_guc_log.c
index e6d59bf..1719f1e 100644
--- a/drivers/gpu/drm/i915/intel_guc_log.c
+++ b/drivers/gpu/drm/i915/intel_guc_log.c
@@ -58,11 +58,15 @@ static int guc_log_flush(struct intel_guc *guc)
 	return intel_guc_send(guc, action, ARRAY_SIZE(action));
 }
 
-static int guc_log_control(struct intel_guc *guc, u32 control_val)
+static int guc_log_control(struct intel_guc *guc, bool enable, u32 verbosity)
 {
+	union guc_log_control control_val = { .logging_enabled = enable,
+					      .reserved1 = 0,
+					      .verbosity = verbosity,
+					      .reserved2 = 0 };
 	u32 action[] = {
 		INTEL_GUC_ACTION_UK_LOG_ENABLE_LOGGING,
-		control_val
+		control_val.value
 	};
 
 	return intel_guc_send(guc, action, ARRAY_SIZE(action));
@@ -567,28 +571,27 @@ void intel_guc_log_destroy(struct intel_guc *guc)
 int i915_guc_log_control(struct drm_i915_private *dev_priv, u64 control_val)
 {
 	struct intel_guc *guc = &dev_priv->guc;
-
-	union guc_log_control log_param;
+	bool enable_logging = control_val > 0;
+	u32 verbosity;
 	int ret;
 
-	log_param.value = control_val;
-
-	if (log_param.verbosity < GUC_LOG_VERBOSITY_MIN ||
-	    log_param.verbosity > GUC_LOG_VERBOSITY_MAX)
+	BUILD_BUG_ON(GUC_LOG_VERBOSITY_MIN);
+	if (control_val > 1 + GUC_LOG_VERBOSITY_MAX)
 		return -EINVAL;
 
 	/* This combination doesn't make sense & won't have any effect */
-	if (!log_param.logging_enabled && !i915_modparams.guc_log_level)
+	if (!enable_logging && !i915_modparams.guc_log_level)
 		return 0;
 
-	ret = guc_log_control(guc, log_param.value);
+	verbosity = enable_logging ? control_val - 1 : 0;
+	ret = guc_log_control(guc, enable_logging, verbosity);
 	if (ret < 0) {
 		DRM_DEBUG_DRIVER("guc_logging_control action failed %d\n", ret);
 		return ret;
 	}
 
-	if (log_param.logging_enabled) {
-		i915_modparams.guc_log_level = 1 + log_param.verbosity;
+	if (enable_logging) {
+		i915_modparams.guc_log_level = 1 + verbosity;
 
 		/*
 		 * If log was disabled at boot time, then the relay channel file
-- 
1.9.1