1 files changed, 49 insertions, 24 deletions

diff --git a/drivers/gpu/drm/i915/i915_debugfs_params.c b/drivers/gpu/drm/i915/i915_debugfs_params.c
index 4e2b077692cb..89ab5eb14779 100644
--- a/drivers/gpu/drm/i915/i915_debugfs_params.c
+++ b/drivers/gpu/drm/i915/i915_debugfs_params.c
@@ -4,11 +4,24 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/debugfs.h>
 
 #include "i915_debugfs_params.h"
+#include "gt/intel_gt.h"
+#include "gt/uc/intel_guc.h"
 #include "i915_drv.h"
 #include "i915_params.h"
 
+#define MATCH_DEBUGFS_NODE_NAME(_file, _name) \
+	(strcmp((_file)->f_path.dentry->d_name.name, (_name)) == 0)
+
+#define GET_I915(i915, name, ptr)	\
+	do {	\
+		struct i915_params *params;	\
+		params = container_of(((void *)(ptr)), typeof(*params), name);	\
+		(i915) = container_of(params, typeof(*(i915)), params);	\
+	} while (0)
+
 /* int param */
 static int i915_param_int_show(struct seq_file *m, void *data)
 {
@@ -24,6 +37,19 @@ static int i915_param_int_open(struct inode *inode, struct file *file)
 	return single_open(file, i915_param_int_show, inode->i_private);
 }
 
+static int notify_guc(struct drm_i915_private *i915)
+{
+	struct intel_gt *gt;
+	int i, ret = 0;
+
+	for_each_gt(gt, i915, i) {
+		if (intel_uc_uses_guc_submission(&gt->uc))
+			ret = intel_guc_global_policies_update(&gt->uc.guc);
+	}
+
+	return ret;
+}
+
 static ssize_t i915_param_int_write(struct file *file,
 				    const char __user *ubuf, size_t len,
 				    loff_t *offp)
@@ -81,8 +107,10 @@ static ssize_t i915_param_uint_write(struct file *file,
 				     const char __user *ubuf, size_t len,
 				     loff_t *offp)
 {
+	struct drm_i915_private *i915;
 	struct seq_file *m = file->private_data;
 	unsigned int *value = m->private;
+	unsigned int old = *value;
 	int ret;
 
 	ret = kstrtouint_from_user(ubuf, len, 0, value);
@@ -95,6 +123,14 @@ static ssize_t i915_param_uint_write(struct file *file,
 			*value = b;
 	}
 
+	if (!ret && MATCH_DEBUGFS_NODE_NAME(file, "reset")) {
+		GET_I915(i915, reset, value);
+
+		ret = notify_guc(i915);
+		if (ret)
+			*value = old;
+	}
+
 	return ret ?: len;
 }
 
@@ -198,36 +234,25 @@ i915_debugfs_create_charp(const char *name, umode_t mode,
 				   &i915_param_charp_fops);
 }
 
-static __always_inline void
-_i915_param_create_file(struct dentry *parent, const char *name,
-			const char *type, int mode, void *value)
-{
-	if (!mode)
-		return;
-
-	if (!__builtin_strcmp(type, "bool"))
-		debugfs_create_bool(name, mode, parent, value);
-	else if (!__builtin_strcmp(type, "int"))
-		i915_debugfs_create_int(name, mode, parent, value);
-	else if (!__builtin_strcmp(type, "unsigned int"))
-		i915_debugfs_create_uint(name, mode, parent, value);
-	else if (!__builtin_strcmp(type, "unsigned long"))
-		debugfs_create_ulong(name, mode, parent, value);
-	else if (!__builtin_strcmp(type, "char *"))
-		i915_debugfs_create_charp(name, mode, parent, value);
-	else
-		WARN(1, "no debugfs fops defined for param type %s (i915.%s)\n",
-		     type, name);
-}
+#define _i915_param_create_file(parent, name, mode, valp)		\
+	do {								\
+		if (mode)						\
+			_Generic(valp,					\
+				 bool *: debugfs_create_bool,		\
+				 int *: i915_debugfs_create_int,	\
+				 unsigned int *: i915_debugfs_create_uint, \
+				 unsigned long *: debugfs_create_ulong,	\
+				 char **: i915_debugfs_create_charp)(name, mode, parent, valp); \
+	} while(0)
 
 /* add a subdirectory with files for each i915 param */
 struct dentry *i915_debugfs_params(struct drm_i915_private *i915)
 {
-	struct drm_minor *minor = i915->drm.primary;
+	struct dentry *debugfs_root = i915->drm.debugfs_root;
 	struct i915_params *params = &i915->params;
 	struct dentry *dir;
 
-	dir = debugfs_create_dir("i915_params", minor->debugfs_root);
+	dir = debugfs_create_dir("i915_params", debugfs_root);
 	if (IS_ERR(dir))
 		return dir;
 
@@ -237,7 +262,7 @@ struct dentry *i915_debugfs_params(struct drm_i915_private *i915)
 	 * just let the generic create file fail silently with -EEXIST.
 	 */
 
-#define REGISTER(T, x, unused, mode, ...) _i915_param_create_file(dir, #x, #T, mode, &params->x);
+#define REGISTER(T, x, unused, mode, ...) _i915_param_create_file(dir, #x, mode, &params->x);
 	I915_PARAMS_FOR_EACH(REGISTER);
 #undef REGISTER