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Release 4.12 include/linux/uio_driver.h

Directory: include/linux
 * include/linux/uio_driver.h
 * Copyright(C) 2005, Benedikt Spranger <>
 * Copyright(C) 2005, Thomas Gleixner <>
 * Copyright(C) 2006, Hans J. Koch <>
 * Copyright(C) 2006, Greg Kroah-Hartman <>
 * Userspace IO driver.
 * Licensed under the GPLv2 only.

#ifndef _UIO_DRIVER_H_

#define _UIO_DRIVER_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;


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 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



/* 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_ */

Overall Contributors

Hans-Jürgen Koch28980.28%533.33%
Andy Grover4311.94%16.67%
Greg Kroah-Hartman82.22%16.67%
Paul Gortmaker82.22%213.33%
Michal Sojka51.39%16.67%
Uwe Kleine-König20.56%16.67%
Stephen Rothwell20.56%16.67%
Eric W. Biedermann10.28%16.67%
Kai Jiang10.28%16.67%
Cristian Stoica10.28%16.67%
Directory: include/linux
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