v4.19.13 snapshot.
diff --git a/include/linux/uio_driver.h b/include/linux/uio_driver.h
new file mode 100644
index 0000000..6f8b68c
--- /dev/null
+++ b/include/linux/uio_driver.h
@@ -0,0 +1,143 @@
+/*
+ * include/linux/uio_driver.h
+ *
+ * Copyright(C) 2005, Benedikt Spranger <b.spranger@linutronix.de>
+ * Copyright(C) 2005, Thomas Gleixner <tglx@linutronix.de>
+ * Copyright(C) 2006, Hans J. Koch <hjk@hansjkoch.de>
+ * Copyright(C) 2006, Greg Kroah-Hartman <greg@kroah.com>
+ *
+ * Userspace IO driver.
+ *
+ * Licensed under the GPLv2 only.
+ */
+
+#ifndef _UIO_DRIVER_H_
+#define _UIO_DRIVER_H_
+
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+
+struct module;
+struct uio_map;
+
+/**
+ * struct uio_mem - description of a UIO memory region
+ * @name: name of the memory region for identification
+ * @addr: address of the device's memory rounded to page
+ * size (phys_addr is used since addr can be
+ * logical, virtual, or physical & phys_addr_t
+ * should always be large enough to handle any of
+ * the address types)
+ * @offs: offset of device memory within the page
+ * @size: size of IO (multiple of page size)
+ * @memtype: type of memory addr points to
+ * @internal_addr: ioremap-ped version of addr, for driver internal use
+ * @map: for use by the UIO core only.
+ */
+struct uio_mem {
+ const char *name;
+ phys_addr_t addr;
+ unsigned long offs;
+ resource_size_t size;
+ int memtype;
+ void __iomem *internal_addr;
+ struct uio_map *map;
+};
+
+#define MAX_UIO_MAPS 5
+
+struct uio_portio;
+
+/**
+ * struct uio_port - description of a UIO port region
+ * @name: name of the port region for identification
+ * @start: start of port region
+ * @size: size of port region
+ * @porttype: type of port (see UIO_PORT_* below)
+ * @portio: for use by the UIO core only.
+ */
+struct uio_port {
+ const char *name;
+ unsigned long start;
+ unsigned long size;
+ int porttype;
+ struct uio_portio *portio;
+};
+
+#define MAX_UIO_PORT_REGIONS 5
+
+struct uio_device {
+ struct module *owner;
+ struct device dev;
+ int minor;
+ atomic_t event;
+ struct fasync_struct *async_queue;
+ wait_queue_head_t wait;
+ struct uio_info *info;
+ struct mutex info_lock;
+ struct kobject *map_dir;
+ struct kobject *portio_dir;
+};
+
+/**
+ * struct uio_info - UIO device capabilities
+ * @uio_dev: the UIO device this info belongs to
+ * @name: device name
+ * @version: device driver version
+ * @mem: list of mappable memory regions, size==0 for end of list
+ * @port: list of port regions, size==0 for end of list
+ * @irq: interrupt number or UIO_IRQ_CUSTOM
+ * @irq_flags: flags for request_irq()
+ * @priv: optional private data
+ * @handler: the device's irq handler
+ * @mmap: mmap operation for this uio device
+ * @open: open operation for this uio device
+ * @release: release operation for this uio device
+ * @irqcontrol: disable/enable irqs when 0/1 is written to /dev/uioX
+ */
+struct uio_info {
+ struct uio_device *uio_dev;
+ const char *name;
+ const char *version;
+ struct uio_mem mem[MAX_UIO_MAPS];
+ struct uio_port port[MAX_UIO_PORT_REGIONS];
+ long irq;
+ unsigned long irq_flags;
+ void *priv;
+ irqreturn_t (*handler)(int irq, struct uio_info *dev_info);
+ int (*mmap)(struct uio_info *info, struct vm_area_struct *vma);
+ int (*open)(struct uio_info *info, struct inode *inode);
+ int (*release)(struct uio_info *info, struct inode *inode);
+ int (*irqcontrol)(struct uio_info *info, s32 irq_on);
+};
+
+extern int __must_check
+ __uio_register_device(struct module *owner,
+ struct device *parent,
+ struct uio_info *info);
+
+/* use a define to avoid include chaining to get THIS_MODULE */
+#define uio_register_device(parent, info) \
+ __uio_register_device(THIS_MODULE, parent, info)
+
+extern void uio_unregister_device(struct uio_info *info);
+extern void uio_event_notify(struct uio_info *info);
+
+/* defines for uio_info->irq */
+#define UIO_IRQ_CUSTOM -1
+#define UIO_IRQ_NONE 0
+
+/* defines for uio_mem->memtype */
+#define UIO_MEM_NONE 0
+#define UIO_MEM_PHYS 1
+#define UIO_MEM_LOGICAL 2
+#define UIO_MEM_VIRTUAL 3
+
+/* defines for uio_port->porttype */
+#define UIO_PORT_NONE 0
+#define UIO_PORT_X86 1
+#define UIO_PORT_GPIO 2
+#define UIO_PORT_OTHER 3
+
+#endif /* _LINUX_UIO_DRIVER_H_ */