drm/xe/pf: Promote PF debugfs function to its own file

In upcoming patches, we will build on the PF separate debugfs
tree for all SR-IOV related files and this new code will need
dedicated file. To minimize large diffs later, move existing
function now as-is, so any future modifications will be done
directly in target file.

Signed-off-by: Michal Wajdeczko <[e-mail]>
Cc: Lucas De Marchi <[e-mail]>
Cc: Rodrigo Vivi <[e-mail]>
Reviewed-by: Lucas De Marchi <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/gpu/drm/xe/Makefile

···
 	xe_lmtt_ml.o \
 	xe_pci_sriov.o \
 	xe_sriov_pf.o \
+	xe_sriov_pf_debugfs.o \
 	xe_sriov_pf_service.o
 
 # include helpers for tests even when XE is built-in

drivers/gpu/drm/xe/xe_debugfs.c

···
 #include "xe_psmi.h"
 #include "xe_pxp_debugfs.h"
 #include "xe_sriov.h"
-#include "xe_sriov_pf.h"
+#include "xe_sriov_pf_debugfs.h"
 #include "xe_sriov_vf.h"
 #include "xe_step.h"
 #include "xe_tile_debugfs.h"

drivers/gpu/drm/xe/xe_sriov_pf.c

···
 	drm_printf(p, "supported: %u\n", xe->sriov.pf.driver_max_vfs);
 	drm_printf(p, "enabled: %u\n", pci_num_vf(pdev));
 }
-
-static int simple_show(struct seq_file *m, void *data)
-{
-	struct drm_printer p = drm_seq_file_printer(m);
-	struct drm_info_node *node = m->private;
-	struct dentry *parent = node->dent->d_parent;
-	struct xe_device *xe = parent->d_inode->i_private;
-	void (*print)(struct xe_device *, struct drm_printer *) = node->info_ent->data;
-
-	print(xe, &p);
-	return 0;
-}
-
-static const struct drm_info_list debugfs_list[] = {
-	{ .name = "vfs", .show = simple_show, .data = xe_sriov_pf_print_vfs_summary },
-	{ .name = "versions", .show = simple_show, .data = xe_sriov_pf_service_print_versions },
-};
-
-/**
- * xe_sriov_pf_debugfs_register - Register PF debugfs attributes.
- * @xe: the &xe_device
- * @root: the root &dentry
- *
- * Prepare debugfs attributes exposed by the PF.
- */
-void xe_sriov_pf_debugfs_register(struct xe_device *xe, struct dentry *root)
-{
-	struct drm_minor *minor = xe->drm.primary;
-	struct dentry *parent;
-
-	/*
-	 *      /sys/kernel/debug/dri/0/
-	 *      ├── pf
-	 *      │   ├── ...
-	 */
-	parent = debugfs_create_dir("pf", root);
-	if (IS_ERR(parent))
-		return;
-	parent->d_inode->i_private = xe;
-
-	drm_debugfs_create_files(debugfs_list, ARRAY_SIZE(debugfs_list), parent, minor);
-}

drivers/gpu/drm/xe/xe_sriov_pf.h

···
 bool xe_sriov_pf_readiness(struct xe_device *xe);
 int xe_sriov_pf_init_early(struct xe_device *xe);
 int xe_sriov_pf_wait_ready(struct xe_device *xe);
-void xe_sriov_pf_debugfs_register(struct xe_device *xe, struct dentry *root);
 void xe_sriov_pf_print_vfs_summary(struct xe_device *xe, struct drm_printer *p);
 #else
 static inline bool xe_sriov_pf_readiness(struct xe_device *xe)
···
 static inline int xe_sriov_pf_init_early(struct xe_device *xe)
 {
 	return 0;
-}
-
-static inline void xe_sriov_pf_debugfs_register(struct xe_device *xe, struct dentry *root)
-{
 }
 #endif
 

drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c

···
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#include <linux/debugfs.h>
+#include <drm/drm_debugfs.h>
+
+#include "xe_device_types.h"
+#include "xe_sriov_pf.h"
+#include "xe_sriov_pf_debugfs.h"
+#include "xe_sriov_pf_service.h"
+
+static int simple_show(struct seq_file *m, void *data)
+{
+	struct drm_printer p = drm_seq_file_printer(m);
+	struct drm_info_node *node = m->private;
+	struct dentry *parent = node->dent->d_parent;
+	struct xe_device *xe = parent->d_inode->i_private;
+	void (*print)(struct xe_device *, struct drm_printer *) = node->info_ent->data;
+
+	print(xe, &p);
+	return 0;
+}
+
+static const struct drm_info_list debugfs_list[] = {
+	{ .name = "vfs", .show = simple_show, .data = xe_sriov_pf_print_vfs_summary },
+	{ .name = "versions", .show = simple_show, .data = xe_sriov_pf_service_print_versions },
+};
+
+/**
+ * xe_sriov_pf_debugfs_register - Register PF debugfs attributes.
+ * @xe: the &xe_device
+ * @root: the root &dentry
+ *
+ * Prepare debugfs attributes exposed by the PF.
+ */
+void xe_sriov_pf_debugfs_register(struct xe_device *xe, struct dentry *root)
+{
+	struct drm_minor *minor = xe->drm.primary;
+	struct dentry *parent;
+
+	/*
+	 *      /sys/kernel/debug/dri/0/
+	 *      ├── pf
+	 *      │   ├── ...
+	 */
+	parent = debugfs_create_dir("pf", root);
+	if (IS_ERR(parent))
+		return;
+	parent->d_inode->i_private = xe;
+
+	drm_debugfs_create_files(debugfs_list, ARRAY_SIZE(debugfs_list), parent, minor);
+}

drivers/gpu/drm/xe/xe_sriov_pf_debugfs.h

···
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#ifndef _XE_SRIOV_PF_DEBUGFS_H_
+#define _XE_SRIOV_PF_DEBUGFS_H_
+
+struct dentry;
+struct xe_device;
+
+#ifdef CONFIG_PCI_IOV
+void xe_sriov_pf_debugfs_register(struct xe_device *xe, struct dentry *root);
+#else
+static inline void xe_sriov_pf_debugfs_register(struct xe_device *xe, struct dentry *root) { }
+#endif
+
+#endif