Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 59 insertions, 0 deletions

diff --git a/drivers/s390/char/tape_class.h b/drivers/s390/char/tape_class.h
new file mode 100644
index 000000000..d25ac075b
--- /dev/null
+++ b/drivers/s390/char/tape_class.h
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 2004   All Rights Reserved.
+ *
+ * Tape class device support
+ *
+ * Author: Stefan Bader <shbader@de.ibm.com>
+ * Based on simple class device code by Greg K-H
+ */
+#ifndef __TAPE_CLASS_H__
+#define __TAPE_CLASS_H__
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/major.h>
+#include <linux/cdev.h>
+
+#include <linux/device.h>
+#include <linux/kdev_t.h>
+
+#define TAPECLASS_NAME_LEN	32
+
+struct tape_class_device {
+	struct cdev		*char_device;
+	struct device		*class_device;
+	char			device_name[TAPECLASS_NAME_LEN];
+	char			mode_name[TAPECLASS_NAME_LEN];
+};
+
+/*
+ * Register a tape device and return a pointer to the tape class device
+ * created by the call.
+ *
+ * device
+ *	The pointer to the struct device of the physical (base) device.
+ * dev
+ *	The intended major/minor number. The major number may be 0 to
+ *	get a dynamic major number.
+ * fops
+ *	The pointer to the drivers file operations for the tape device.
+ * device_name
+ *	Pointer to the logical device name (will also be used as kobject name
+ *	of the cdev). This can also be called the name of the tape class
+ *	device.
+ * mode_name
+ *	Points to the name of the tape mode. This creates a link with that
+ *	name from the physical device to the logical device (class).
+ */
+struct tape_class_device *register_tape_dev(
+	struct device *		device,
+	dev_t			dev,
+	const struct file_operations *fops,
+	char *			device_name,
+	char *			node_name
+);
+void unregister_tape_dev(struct device *device, struct tape_class_device *tcd);
+
+#endif /* __TAPE_CLASS_H__ */