[PATCH v2 08/11] drm/i915/guc: Make guc_log_level parameter immutable

Sagar Arun Kamble sagar.a.kamble at intel.com
Tue Oct 31 17:48:50 UTC 2017


This patch introduces i915 internal state variable in GuC log struct,
"level" which will be copied from guc_log_level modparam during i915
load and thereafter be available for user updates. This will make
guc_log_level parameter immutable.

Suggested-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c   |  2 +-
 drivers/gpu/drm/i915/i915_gpu_error.c |  2 +-
 drivers/gpu/drm/i915/intel_guc.c      |  6 +++---
 drivers/gpu/drm/i915/intel_guc_log.c  | 23 ++++++++++-------------
 drivers/gpu/drm/i915/intel_guc_log.h  |  6 ++++++
 drivers/gpu/drm/i915/intel_uc.c       |  9 +++++++--
 6 files changed, 28 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index c1e5bba..2fd1dbb 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2591,7 +2591,7 @@ static int i915_guc_log_control_get(void *data, u64 *val)
 	if (!dev_priv->guc.log.vma)
 		return -EINVAL;
 
-	*val = i915_modparams.guc_log_level;
+	*val = dev_priv->guc.log.level;
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 653fb69..ddc2237 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1563,7 +1563,7 @@ static void i915_gem_capture_guc_log_buffer(struct drm_i915_private *dev_priv,
 					    struct i915_gpu_state *error)
 {
 	/* Capturing log buf contents won't be useful if logging was disabled */
-	if (!dev_priv->guc.log.vma || (i915_modparams.guc_log_level < 0))
+	if (!dev_priv->guc.log.vma || dev_priv->guc.log.level < 0)
 		return;
 
 	error->guc_log = i915_error_object_create(dev_priv,
diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
index 4917bb6..8a267d2 100644
--- a/drivers/gpu/drm/i915/intel_guc.c
+++ b/drivers/gpu/drm/i915/intel_guc.c
@@ -119,9 +119,9 @@ void intel_guc_init_params(struct intel_guc *guc)
 
 	params[GUC_CTL_LOG_PARAMS] = guc->log.flags;
 
-	if (i915_modparams.guc_log_level >= 0) {
+	if (guc->log.level >= 0) {
 		params[GUC_CTL_DEBUG] =
-			i915_modparams.guc_log_level << GUC_LOG_VERBOSITY_SHIFT;
+			guc->log.level << GUC_LOG_VERBOSITY_SHIFT;
 	} else {
 		params[GUC_CTL_DEBUG] = GUC_LOG_DISABLED;
 	}
@@ -295,7 +295,7 @@ int intel_guc_resume(struct drm_i915_private *dev_priv)
 	if (guc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
 		return 0;
 
-	if (i915_modparams.guc_log_level >= 0)
+	if (guc->log.level >= 0)
 		intel_enable_guc_interrupts(guc);
 
 	data[0] = INTEL_GUC_ACTION_EXIT_S_STATE;
diff --git a/drivers/gpu/drm/i915/intel_guc_log.c b/drivers/gpu/drm/i915/intel_guc_log.c
index efadd15..36fe496 100644
--- a/drivers/gpu/drm/i915/intel_guc_log.c
+++ b/drivers/gpu/drm/i915/intel_guc_log.c
@@ -148,7 +148,7 @@ static int guc_log_relay_file_create(struct intel_guc *guc)
 	struct dentry *log_dir;
 	int ret;
 
-	if (i915_modparams.guc_log_level < 0)
+	if (guc->log.level < 0)
 		return 0;
 
 	/* For now create the log file in /sys/kernel/debug/dri/0 dir */
@@ -446,7 +446,7 @@ void intel_guc_log_runtime_destroy(struct intel_guc *guc)
 {
 	/*
 	 * It's possible that the runtime stuff was never allocated because
-	 * guc_log_level was < 0 at the time
+	 * guc->log.level was < 0 at the time
 	 **/
 	if (!guc_log_has_runtime(guc))
 		return;
@@ -484,7 +484,7 @@ static int guc_log_late_setup(struct intel_guc *guc)
 	intel_guc_log_runtime_destroy(guc);
 err:
 	/* logging will remain off */
-	i915_modparams.guc_log_level = -1;
+	guc->log.level = -1;
 	return ret;
 }
 
@@ -505,7 +505,7 @@ static void guc_log_capture_logs(struct intel_guc *guc)
 static void guc_flush_logs(struct intel_guc *guc)
 {
 	if (!i915_modparams.enable_guc_submission ||
-	    (i915_modparams.guc_log_level < 0))
+	    guc->log.level < 0)
 		return;
 
 	/* First disable the interrupts, will be renabled afterwards */
@@ -533,9 +533,6 @@ int intel_guc_log_create(struct intel_guc *guc)
 
 	GEM_BUG_ON(guc->log.vma);
 
-	if (i915_modparams.guc_log_level > GUC_LOG_VERBOSITY_MAX)
-		i915_modparams.guc_log_level = GUC_LOG_VERBOSITY_MAX;
-
 	/* The first page is to save log buffer state. Allocate one
 	 * extra page for others in case for overlap */
 	size = (1 + GUC_LOG_DPC_PAGES + 1 +
@@ -559,7 +556,7 @@ int intel_guc_log_create(struct intel_guc *guc)
 
 	guc->log.vma = vma;
 
-	if (i915_modparams.guc_log_level >= 0) {
+	if (guc->log.level >= 0) {
 		ret = guc_log_runtime_create(guc);
 		if (ret < 0)
 			goto err_vma;
@@ -580,7 +577,7 @@ int intel_guc_log_create(struct intel_guc *guc)
 	i915_vma_unpin_and_release(&guc->log.vma);
 err:
 	/* logging will be off */
-	i915_modparams.guc_log_level = -1;
+	guc->log.level = -1;
 	return ret;
 }
 
@@ -603,7 +600,7 @@ int i915_guc_log_control(struct drm_i915_private *dev_priv, u64 control_val)
 		return -EINVAL;
 
 	/* This combination doesn't make sense & won't have any effect */
-	if (!log_param.logging_enabled && (i915_modparams.guc_log_level < 0))
+	if (!log_param.logging_enabled && guc->log.level < 0)
 		return 0;
 
 	ret = guc_log_control(guc, log_param.value);
@@ -613,7 +610,7 @@ int i915_guc_log_control(struct drm_i915_private *dev_priv, u64 control_val)
 	}
 
 	if (log_param.logging_enabled) {
-		i915_modparams.guc_log_level = log_param.verbosity;
+		guc->log.level = log_param.verbosity;
 
 		/* If log_level was set as -1 at boot time, then the relay channel file
 		 * wouldn't have been created by now and interrupts also would not have
@@ -636,7 +633,7 @@ int i915_guc_log_control(struct drm_i915_private *dev_priv, u64 control_val)
 		guc_flush_logs(guc);
 
 		/* As logging is disabled, update log level to reflect that */
-		i915_modparams.guc_log_level = -1;
+		guc->log.level = -1;
 	}
 
 	return ret;
@@ -645,7 +642,7 @@ int i915_guc_log_control(struct drm_i915_private *dev_priv, u64 control_val)
 void i915_guc_log_register(struct drm_i915_private *dev_priv)
 {
 	if (!i915_modparams.enable_guc_submission ||
-	    (i915_modparams.guc_log_level < 0))
+	    dev_priv->guc.log.level < 0)
 		return;
 
 	mutex_lock(&dev_priv->drm.struct_mutex);
diff --git a/drivers/gpu/drm/i915/intel_guc_log.h b/drivers/gpu/drm/i915/intel_guc_log.h
index f4ea084..fec1269 100644
--- a/drivers/gpu/drm/i915/intel_guc_log.h
+++ b/drivers/gpu/drm/i915/intel_guc_log.h
@@ -33,6 +33,12 @@
 struct intel_guc;
 
 struct intel_guc_log {
+	/*
+	 * Current GuC firmware logging level. This depends on kernel parameter
+	 * guc_log_level during load and thereafter on user requests. It has
+	 * similar semantics as guc_log_level. (-1:disabled, "0-3:enabled)")
+	 */
+	int level;
 	u32 flags;
 	struct i915_vma *vma;
 	/* The runtime stuff gets created only when GuC logging gets enabled */
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 89d3345..61a80c4 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -87,6 +87,11 @@ void intel_uc_sanitize_options(struct drm_i915_private *dev_priv)
 	/* A negative value means "use platform default" */
 	if (i915_modparams.enable_guc_submission < 0)
 		i915_modparams.enable_guc_submission = HAS_GUC_SCHED(dev_priv);
+
+	if (i915_modparams.guc_log_level > GUC_LOG_VERBOSITY_MAX)
+		i915_modparams.guc_log_level = GUC_LOG_VERBOSITY_MAX;
+
+	dev_priv->guc.log.level = i915_modparams.guc_log_level;
 }
 
 void intel_uc_init_early(struct drm_i915_private *dev_priv)
@@ -121,7 +126,7 @@ void intel_uc_init_mmio(struct drm_i915_private *dev_priv)
 
 static void guc_capture_load_err_log(struct intel_guc *guc)
 {
-	if (!guc->log.vma || i915_modparams.guc_log_level < 0)
+	if (!guc->log.vma || guc->log.level < 0)
 		return;
 
 	if (!guc->load_err_log)
@@ -222,7 +227,7 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
 
 	intel_huc_auth(&dev_priv->huc);
 	if (i915_modparams.enable_guc_submission) {
-		if (i915_modparams.guc_log_level >= 0)
+		if (guc->log.level >= 0)
 			intel_enable_guc_interrupts(guc);
 
 		ret = i915_guc_submission_enable(dev_priv);
-- 
1.9.1



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