drm/i915/gt: Move pm debug files into a gt aware debugfs

The GT system is becoming more and more a stand-alone system in
i915 and it's fair to assign it its own debugfs directory.

rc6, rps and llc debugfs files are gt related, move them into the
gt debugfs directory.
Signed-off-by: Andi Shyti <andi.shyti@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191222144046.1674865-3-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/Makefile

@@ -75,6 +75,9 @@ i915-$(CONFIG_PERF_EVENTS) += i915_pmu.o
 # "Graphics Technology" (aka we talk to the gpu)
 obj-y += gt/
 gt-y += \
+	gt/debugfs_engines.o \
+	gt/debugfs_gt.o \
+	gt/debugfs_gt_pm.o \
 	gt/intel_breadcrumbs.o \
 	gt/intel_context.o \
 	gt/intel_engine_cs.o \

drivers/gpu/drm/i915/gt/debugfs_engines.c

+// SPDX-License-Identifier: MIT
+
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include <drm/drm_print.h>
+
+#include "debugfs_engines.h"
+#include "debugfs_gt.h"
+#include "i915_drv.h" /* for_each_engine! */
+#include "intel_engine.h"
+
+static int engines_show(struct seq_file *m, void *data)
+{
+	struct intel_gt *gt = m->private;
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+	struct drm_printer p;
+
+	p = drm_seq_file_printer(m);
+	for_each_engine(engine, gt, id)
+		intel_engine_dump(engine, &p, "%s\n", engine->name);
+
+	return 0;
+}
+DEFINE_GT_DEBUGFS_ATTRIBUTE(engines);
+
+void debugfs_engines_register(struct intel_gt *gt, struct dentry *root)
+{
+	static const struct debugfs_gt_file files[] = {
+		{ "engines", &engines_fops },
+	};
+
+	debugfs_gt_register_files(gt, root, files, ARRAY_SIZE(files));
+}

drivers/gpu/drm/i915/gt/debugfs_engines.h

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef DEBUGFS_ENGINES_H
+#define DEBUGFS_ENGINES_H
+
+struct intel_gt;
+struct dentry;
+
+void debugfs_engines_register(struct intel_gt *gt, struct dentry *root);
+
+#endif /* DEBUGFS_ENGINES_H */

drivers/gpu/drm/i915/gt/debugfs_gt.c

+// SPDX-License-Identifier: MIT
+
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include <linux/debugfs.h>
+
+#include "debugfs_engines.h"
+#include "debugfs_gt.h"
+#include "debugfs_gt_pm.h"
+#include "i915_drv.h"
+
+void debugfs_gt_register(struct intel_gt *gt)
+{
+	struct dentry *root;
+
+	if (!gt->i915->drm.primary->debugfs_root)
+		return;
+
+	root = debugfs_create_dir("gt", gt->i915->drm.primary->debugfs_root);
+	if (IS_ERR(root))
+		return;
+
+	debugfs_engines_register(gt, root);
+	debugfs_gt_pm_register(gt, root);
+}
+
+void debugfs_gt_register_files(struct intel_gt *gt,
+			       struct dentry *root,
+			       const struct debugfs_gt_file *files,
+			       unsigned long count)
+{
+	while (count--) {
+		if (!files->eval || files->eval(gt))
+			debugfs_create_file(files->name,
+					    0444, root, gt,
+					    files->fops);
+
+		files++;
+	}
+}

drivers/gpu/drm/i915/gt/debugfs_gt.h

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef DEBUGFS_GT_H
+#define DEBUGFS_GT_H
+
+#include <linux/file.h>
+
+struct intel_gt;
+
+#define DEFINE_GT_DEBUGFS_ATTRIBUTE(__name)				\
+	static int __name ## _open(struct inode *inode, struct file *file) \
+{									\
+	return single_open(file, __name ## _show, inode->i_private);	\
+}									\
+static const struct file_operations __name ## _fops = {			\
+	.owner = THIS_MODULE,						\
+	.open = __name ## _open,					\
+	.read = seq_read,						\
+	.llseek = seq_lseek,						\
+	.release = single_release,					\
+}
+
+void debugfs_gt_register(struct intel_gt *gt);
+
+struct debugfs_gt_file {
+	const char *name;
+	const struct file_operations *fops;
+	bool (*eval)(const struct intel_gt *gt);
+};
+
+void debugfs_gt_register_files(struct intel_gt *gt,
+			       struct dentry *root,
+			       const struct debugfs_gt_file *files,
+			       unsigned long count);
+
+#endif /* DEBUGFS_GT_H */

drivers/gpu/drm/i915/gt/debugfs_gt_pm.h

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef DEBUGFS_GT_PM_H
+#define DEBUGFS_GT_PM_H
+
+struct intel_gt;
+struct dentry;
+
+void debugfs_gt_pm_register(struct intel_gt *gt, struct dentry *root);
+
+#endif /* DEBUGFS_GT_PM_H */

drivers/gpu/drm/i915/gt/intel_gt.c

@@ -3,6 +3,7 @@
  * Copyright © 2019 Intel Corporation
  */
 
+#include "debugfs_gt.h"
 #include "i915_drv.h"
 #include "intel_context.h"
 #include "intel_gt.h"
@@ -325,6 +326,8 @@ void intel_gt_chipset_flush(struct intel_gt *gt)
 void intel_gt_driver_register(struct intel_gt *gt)
 {
 	intel_rps_driver_register(&gt->rps);
+
+	debugfs_gt_register(gt);
 }
 
 static int intel_gt_init_scratch(struct intel_gt *gt, unsigned int size)