drivers/staging/android/binder.h - linux - Git at Google

 /*
  * Copyright (C) 2008 Google, Inc.
  *
  * Based on, but no longer compatible with, the original
  * OpenBinder.org binder driver interface, which is:
  *
  * Copyright (c) 2005 Palmsource, Inc.
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
  * may be copied, distributed, and modified under those terms.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  */

 #ifndef _LINUX_BINDER_H
 #define _LINUX_BINDER_H

 #include <linux/ioctl.h>

 #define B_PACK_CHARS(c1, c2, c3, c4) \
 	((((c1)<<24)) | (((c2)<<16)) | (((c3)<<8)) | (c4))
 #define B_TYPE_LARGE 0x85

 enum {
 	BINDER_TYPE_BINDER	= B_PACK_CHARS('s', 'b', '*', B_TYPE_LARGE),
 	BINDER_TYPE_WEAK_BINDER	= B_PACK_CHARS('w', 'b', '*', B_TYPE_LARGE),
 	BINDER_TYPE_HANDLE	= B_PACK_CHARS('s', 'h', '*', B_TYPE_LARGE),
 	BINDER_TYPE_WEAK_HANDLE	= B_PACK_CHARS('w', 'h', '*', B_TYPE_LARGE),
 	BINDER_TYPE_FD		= B_PACK_CHARS('f', 'd', '*', B_TYPE_LARGE),
 };

 enum {
 	FLAT_BINDER_FLAG_PRIORITY_MASK = 0xff,
 	FLAT_BINDER_FLAG_ACCEPTS_FDS = 0x100,
 };

 /*
  * This is the flattened representation of a Binder object for transfer
  * between processes.  The 'offsets' supplied as part of a binder transaction
  * contains offsets into the data where these structures occur.  The Binder
  * driver takes care of re-writing the structure type and data as it moves
  * between processes.
  */
 struct flat_binder_object {
 	/* 8 bytes for large_flat_header. */
 	unsigned long		type;
 	unsigned long		flags;

 	/* 8 bytes of data. */
 	union {
 		void		*binder;	/* local object */
 		signed long	handle;		/* remote object */
 	};

 	/* extra data associated with local object */
 	void			*cookie;
 };

 /*
  * On 64-bit platforms where user code may run in 32-bits the driver must
  * translate the buffer (and local binder) addresses apropriately.
  */

 struct binder_write_read {
 	signed long	write_size;	/* bytes to write */
 	signed long	write_consumed;	/* bytes consumed by driver */
 	unsigned long	write_buffer;
 	signed long	read_size;	/* bytes to read */
 	signed long	read_consumed;	/* bytes consumed by driver */
 	unsigned long	read_buffer;
 };

 /* Use with BINDER_VERSION, driver fills in fields. */
 struct binder_version {
 	/* driver protocol version -- increment with incompatible change */
 	signed long	protocol_version;
 };

 /* This is the current protocol version. */
 #define BINDER_CURRENT_PROTOCOL_VERSION 7

 #define BINDER_WRITE_READ   		_IOWR('b', 1, struct binder_write_read)
 #define	BINDER_SET_IDLE_TIMEOUT		_IOW('b', 3, int64_t)
 #define	BINDER_SET_MAX_THREADS		_IOW('b', 5, size_t)
 #define	BINDER_SET_IDLE_PRIORITY	_IOW('b', 6, int)
 #define	BINDER_SET_CONTEXT_MGR		_IOW('b', 7, int)
 #define	BINDER_THREAD_EXIT		_IOW('b', 8, int)
 #define BINDER_VERSION			_IOWR('b', 9, struct binder_version)

 /*
  * NOTE: Two special error codes you should check for when calling
  * in to the driver are:
  *
  * EINTR -- The operation has been interupted.  This should be
  * handled by retrying the ioctl() until a different error code
  * is returned.
  *
  * ECONNREFUSED -- The driver is no longer accepting operations
  * from your process.  That is, the process is being destroyed.
  * You should handle this by exiting from your process.  Note
  * that once this error code is returned, all further calls to
  * the driver from any thread will return this same code.
  */

 enum transaction_flags {
 	TF_ONE_WAY	= 0x01,	/* this is a one-way call: async, no return */
 	TF_ROOT_OBJECT	= 0x04,	/* contents are the component's root object */
 	TF_STATUS_CODE	= 0x08,	/* contents are a 32-bit status code */
 	TF_ACCEPT_FDS	= 0x10,	/* allow replies with file descriptors */
 };

 struct binder_transaction_data {
 	/* The first two are only used for bcTRANSACTION and brTRANSACTION,
 	 * identifying the target and contents of the transaction.
 	 */
 	union {
 		size_t	handle;	/* target descriptor of command transaction */
 		void	*ptr;	/* target descriptor of return transaction */
 	} target;
 	void		*cookie;	/* target object cookie */
 	unsigned int	code;		/* transaction command */

 	/* General information about the transaction. */
 	unsigned int	flags;
 	pid_t		sender_pid;
 	uid_t		sender_euid;
 	size_t		data_size;	/* number of bytes of data */
 	size_t		offsets_size;	/* number of bytes of offsets */

 	/* If this transaction is inline, the data immediately
 	 * follows here; otherwise, it ends with a pointer to
 	 * the data buffer.
 	 */
 	union {
 		struct {
 			/* transaction data */
 			const void	*buffer;
 			/* offsets from buffer to flat_binder_object structs */
 			const void	*offsets;
 		} ptr;
 		uint8_t	buf[8];
 	} data;
 };

 struct binder_ptr_cookie {
 	void *ptr;
 	void *cookie;
 };

 struct binder_pri_desc {
 	int priority;
 	int desc;
 };

 struct binder_pri_ptr_cookie {
 	int priority;
 	void *ptr;
 	void *cookie;
 };

 enum BinderDriverReturnProtocol {
 	BR_ERROR = _IOR('r', 0, int),
 	/*
 	 * int: error code
 	 */

 	BR_OK = _IO('r', 1),
 	/* No parameters! */

 	BR_TRANSACTION = _IOR('r', 2, struct binder_transaction_data),
 	BR_REPLY = _IOR('r', 3, struct binder_transaction_data),
 	/*
 	 * binder_transaction_data: the received command.
 	 */

 	BR_ACQUIRE_RESULT = _IOR('r', 4, int),
 	/*
 	 * not currently supported
 	 * int: 0 if the last bcATTEMPT_ACQUIRE was not successful.
 	 * Else the remote object has acquired a primary reference.
 	 */

 	BR_DEAD_REPLY = _IO('r', 5),
 	/*
 	 * The target of the last transaction (either a bcTRANSACTION or
 	 * a bcATTEMPT_ACQUIRE) is no longer with us.  No parameters.
 	 */

 	BR_TRANSACTION_COMPLETE = _IO('r', 6),
 	/*
 	 * No parameters... always refers to the last transaction requested
 	 * (including replies).  Note that this will be sent even for
 	 * asynchronous transactions.
 	 */

 	BR_INCREFS = _IOR('r', 7, struct binder_ptr_cookie),
 	BR_ACQUIRE = _IOR('r', 8, struct binder_ptr_cookie),
 	BR_RELEASE = _IOR('r', 9, struct binder_ptr_cookie),
 	BR_DECREFS = _IOR('r', 10, struct binder_ptr_cookie),
 	/*
 	 * void *:	ptr to binder
 	 * void *: cookie for binder
 	 */

 	BR_ATTEMPT_ACQUIRE = _IOR('r', 11, struct binder_pri_ptr_cookie),
 	/*
 	 * not currently supported
 	 * int:	priority
 	 * void *: ptr to binder
 	 * void *: cookie for binder
 	 */

 	BR_NOOP = _IO('r', 12),
 	/*
 	 * No parameters.  Do nothing and examine the next command.  It exists
 	 * primarily so that we can replace it with a BR_SPAWN_LOOPER command.
 	 */

 	BR_SPAWN_LOOPER = _IO('r', 13),
 	/*
 	 * No parameters.  The driver has determined that a process has no
 	 * threads waiting to service incomming transactions.  When a process
 	 * receives this command, it must spawn a new service thread and
 	 * register it via bcENTER_LOOPER.
 	 */

 	BR_FINISHED = _IO('r', 14),
 	/*
 	 * not currently supported
 	 * stop threadpool thread
 	 */

 	BR_DEAD_BINDER = _IOR('r', 15, void *),
 	/*
 	 * void *: cookie
 	 */
 	BR_CLEAR_DEATH_NOTIFICATION_DONE = _IOR('r', 16, void *),
 	/*
 	 * void *: cookie
 	 */

 	BR_FAILED_REPLY = _IO('r', 17),
 	/*
 	 * The the last transaction (either a bcTRANSACTION or
 	 * a bcATTEMPT_ACQUIRE) failed (e.g. out of memory).  No parameters.
 	 */
 };

 enum BinderDriverCommandProtocol {
 	BC_TRANSACTION = _IOW('c', 0, struct binder_transaction_data),
 	BC_REPLY = _IOW('c', 1, struct binder_transaction_data),
 	/*
 	 * binder_transaction_data: the sent command.
 	 */

 	BC_ACQUIRE_RESULT = _IOW('c', 2, int),
 	/*
 	 * not currently supported
 	 * int:  0 if the last BR_ATTEMPT_ACQUIRE was not successful.
 	 * Else you have acquired a primary reference on the object.
 	 */

 	BC_FREE_BUFFER = _IOW('c', 3, int),
 	/*
 	 * void *: ptr to transaction data received on a read
 	 */

 	BC_INCREFS = _IOW('c', 4, int),
 	BC_ACQUIRE = _IOW('c', 5, int),
 	BC_RELEASE = _IOW('c', 6, int),
 	BC_DECREFS = _IOW('c', 7, int),
 	/*
 	 * int:	descriptor
 	 */

 	BC_INCREFS_DONE = _IOW('c', 8, struct binder_ptr_cookie),
 	BC_ACQUIRE_DONE = _IOW('c', 9, struct binder_ptr_cookie),
 	/*
 	 * void *: ptr to binder
 	 * void *: cookie for binder
 	 */

 	BC_ATTEMPT_ACQUIRE = _IOW('c', 10, struct binder_pri_desc),
 	/*
 	 * not currently supported
 	 * int: priority
 	 * int: descriptor
 	 */

 	BC_REGISTER_LOOPER = _IO('c', 11),
 	/*
 	 * No parameters.
 	 * Register a spawned looper thread with the device.
 	 */

 	BC_ENTER_LOOPER = _IO('c', 12),
 	BC_EXIT_LOOPER = _IO('c', 13),
 	/*
 	 * No parameters.
 	 * These two commands are sent as an application-level thread
 	 * enters and exits the binder loop, respectively.  They are
 	 * used so the binder can have an accurate count of the number
 	 * of looping threads it has available.
 	 */

 	BC_REQUEST_DEATH_NOTIFICATION = _IOW('c', 14, struct binder_ptr_cookie),
 	/*
 	 * void *: ptr to binder
 	 * void *: cookie
 	 */

 	BC_CLEAR_DEATH_NOTIFICATION = _IOW('c', 15, struct binder_ptr_cookie),
 	/*
 	 * void *: ptr to binder
 	 * void *: cookie
 	 */

 	BC_DEAD_BINDER_DONE = _IOW('c', 16, void *),
 	/*
 	 * void *: cookie
 	 */
 };

 #endif /* _LINUX_BINDER_H */
	/*
	* Copyright (C) 2008 Google, Inc.
	*
	* Based on, but no longer compatible with, the original
	* OpenBinder.org binder driver interface, which is:
	*
	* Copyright (c) 2005 Palmsource, Inc.
	*
	* This software is licensed under the terms of the GNU General Public
	* License version 2, as published by the Free Software Foundation, and
	* may be copied, distributed, and modified under those terms.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	*/

	#ifndef _LINUX_BINDER_H
	#define _LINUX_BINDER_H

	#include <linux/ioctl.h>

	#define B_PACK_CHARS(c1, c2, c3, c4) \
	((((c1)<<24)) \| (((c2)<<16)) \| (((c3)<<8)) \| (c4))
	#define B_TYPE_LARGE 0x85

	enum {
	BINDER_TYPE_BINDER = B_PACK_CHARS('s', 'b', '*', B_TYPE_LARGE),
	BINDER_TYPE_WEAK_BINDER = B_PACK_CHARS('w', 'b', '*', B_TYPE_LARGE),
	BINDER_TYPE_HANDLE = B_PACK_CHARS('s', 'h', '*', B_TYPE_LARGE),
	BINDER_TYPE_WEAK_HANDLE = B_PACK_CHARS('w', 'h', '*', B_TYPE_LARGE),
	BINDER_TYPE_FD = B_PACK_CHARS('f', 'd', '*', B_TYPE_LARGE),
	};

	enum {
	FLAT_BINDER_FLAG_PRIORITY_MASK = 0xff,
	FLAT_BINDER_FLAG_ACCEPTS_FDS = 0x100,
	};

	/*
	* This is the flattened representation of a Binder object for transfer
	* between processes. The 'offsets' supplied as part of a binder transaction
	* contains offsets into the data where these structures occur. The Binder
	* driver takes care of re-writing the structure type and data as it moves
	* between processes.
	*/
	struct flat_binder_object {
	/* 8 bytes for large_flat_header. */
	unsigned long type;
	unsigned long flags;

	/* 8 bytes of data. */
	union {
	void binder; / local object */
	signed long handle; /* remote object */
	};

	/* extra data associated with local object */
	void *cookie;
	};

	/*
	* On 64-bit platforms where user code may run in 32-bits the driver must
	* translate the buffer (and local binder) addresses apropriately.
	*/

	struct binder_write_read {
	signed long write_size; /* bytes to write */
	signed long write_consumed; /* bytes consumed by driver */
	unsigned long write_buffer;
	signed long read_size; /* bytes to read */
	signed long read_consumed; /* bytes consumed by driver */
	unsigned long read_buffer;
	};

	/* Use with BINDER_VERSION, driver fills in fields. */
	struct binder_version {
	/* driver protocol version -- increment with incompatible change */
	signed long protocol_version;
	};

	/* This is the current protocol version. */
	#define BINDER_CURRENT_PROTOCOL_VERSION 7

	#define BINDER_WRITE_READ _IOWR('b', 1, struct binder_write_read)
	#define BINDER_SET_IDLE_TIMEOUT _IOW('b', 3, int64_t)
	#define BINDER_SET_MAX_THREADS _IOW('b', 5, size_t)
	#define BINDER_SET_IDLE_PRIORITY _IOW('b', 6, int)
	#define BINDER_SET_CONTEXT_MGR _IOW('b', 7, int)
	#define BINDER_THREAD_EXIT _IOW('b', 8, int)
	#define BINDER_VERSION _IOWR('b', 9, struct binder_version)

	/*
	* NOTE: Two special error codes you should check for when calling
	* in to the driver are:
	*
	* EINTR -- The operation has been interupted. This should be
	* handled by retrying the ioctl() until a different error code
	* is returned.
	*
	* ECONNREFUSED -- The driver is no longer accepting operations
	* from your process. That is, the process is being destroyed.
	* You should handle this by exiting from your process. Note
	* that once this error code is returned, all further calls to
	* the driver from any thread will return this same code.
	*/

	enum transaction_flags {
	TF_ONE_WAY = 0x01, /* this is a one-way call: async, no return */
	TF_ROOT_OBJECT = 0x04, /* contents are the component's root object */
	TF_STATUS_CODE = 0x08, /* contents are a 32-bit status code */
	TF_ACCEPT_FDS = 0x10, /* allow replies with file descriptors */
	};

	struct binder_transaction_data {
	/* The first two are only used for bcTRANSACTION and brTRANSACTION,
	* identifying the target and contents of the transaction.
	*/
	union {
	size_t handle; /* target descriptor of command transaction */
	void ptr; / target descriptor of return transaction */
	} target;
	void cookie; / target object cookie */
	unsigned int code; /* transaction command */

	/* General information about the transaction. */
	unsigned int flags;
	pid_t sender_pid;
	uid_t sender_euid;
	size_t data_size; /* number of bytes of data */
	size_t offsets_size; /* number of bytes of offsets */

	/* If this transaction is inline, the data immediately
	* follows here; otherwise, it ends with a pointer to
	* the data buffer.
	*/
	union {
	struct {
	/* transaction data */
	const void *buffer;
	/* offsets from buffer to flat_binder_object structs */
	const void *offsets;
	} ptr;
	uint8_t buf[8];
	} data;
	};

	struct binder_ptr_cookie {
	void *ptr;
	void *cookie;
	};

	struct binder_pri_desc {
	int priority;
	int desc;
	};

	struct binder_pri_ptr_cookie {
	int priority;
	void *ptr;
	void *cookie;
	};

	enum BinderDriverReturnProtocol {
	BR_ERROR = _IOR('r', 0, int),
	/*
	* int: error code
	*/

	BR_OK = _IO('r', 1),
	/* No parameters! */

	BR_TRANSACTION = _IOR('r', 2, struct binder_transaction_data),
	BR_REPLY = _IOR('r', 3, struct binder_transaction_data),
	/*
	* binder_transaction_data: the received command.
	*/

	BR_ACQUIRE_RESULT = _IOR('r', 4, int),
	/*
	* not currently supported
	* int: 0 if the last bcATTEMPT_ACQUIRE was not successful.
	* Else the remote object has acquired a primary reference.
	*/

	BR_DEAD_REPLY = _IO('r', 5),
	/*
	* The target of the last transaction (either a bcTRANSACTION or
	* a bcATTEMPT_ACQUIRE) is no longer with us. No parameters.
	*/

	BR_TRANSACTION_COMPLETE = _IO('r', 6),
	/*
	* No parameters... always refers to the last transaction requested
	* (including replies). Note that this will be sent even for
	* asynchronous transactions.
	*/

	BR_INCREFS = _IOR('r', 7, struct binder_ptr_cookie),
	BR_ACQUIRE = _IOR('r', 8, struct binder_ptr_cookie),
	BR_RELEASE = _IOR('r', 9, struct binder_ptr_cookie),
	BR_DECREFS = _IOR('r', 10, struct binder_ptr_cookie),
	/*
	* void *: ptr to binder
	* void *: cookie for binder
	*/

	BR_ATTEMPT_ACQUIRE = _IOR('r', 11, struct binder_pri_ptr_cookie),
	/*
	* not currently supported
	* int: priority
	* void *: ptr to binder
	* void *: cookie for binder
	*/

	BR_NOOP = _IO('r', 12),
	/*
	* No parameters. Do nothing and examine the next command. It exists
	* primarily so that we can replace it with a BR_SPAWN_LOOPER command.
	*/

	BR_SPAWN_LOOPER = _IO('r', 13),
	/*
	* No parameters. The driver has determined that a process has no
	* threads waiting to service incomming transactions. When a process
	* receives this command, it must spawn a new service thread and
	* register it via bcENTER_LOOPER.
	*/

	BR_FINISHED = _IO('r', 14),
	/*
	* not currently supported
	* stop threadpool thread
	*/

	BR_DEAD_BINDER = _IOR('r', 15, void *),
	/*
	* void *: cookie
	*/
	BR_CLEAR_DEATH_NOTIFICATION_DONE = _IOR('r', 16, void *),
	/*
	* void *: cookie
	*/

	BR_FAILED_REPLY = _IO('r', 17),
	/*
	* The the last transaction (either a bcTRANSACTION or
	* a bcATTEMPT_ACQUIRE) failed (e.g. out of memory). No parameters.
	*/
	};

	enum BinderDriverCommandProtocol {
	BC_TRANSACTION = _IOW('c', 0, struct binder_transaction_data),
	BC_REPLY = _IOW('c', 1, struct binder_transaction_data),
	/*
	* binder_transaction_data: the sent command.
	*/

	BC_ACQUIRE_RESULT = _IOW('c', 2, int),
	/*
	* not currently supported
	* int: 0 if the last BR_ATTEMPT_ACQUIRE was not successful.
	* Else you have acquired a primary reference on the object.
	*/

	BC_FREE_BUFFER = _IOW('c', 3, int),
	/*
	* void *: ptr to transaction data received on a read
	*/

	BC_INCREFS = _IOW('c', 4, int),
	BC_ACQUIRE = _IOW('c', 5, int),
	BC_RELEASE = _IOW('c', 6, int),
	BC_DECREFS = _IOW('c', 7, int),
	/*
	* int: descriptor
	*/

	BC_INCREFS_DONE = _IOW('c', 8, struct binder_ptr_cookie),
	BC_ACQUIRE_DONE = _IOW('c', 9, struct binder_ptr_cookie),
	/*
	* void *: ptr to binder
	* void *: cookie for binder
	*/

	BC_ATTEMPT_ACQUIRE = _IOW('c', 10, struct binder_pri_desc),
	/*
	* not currently supported
	* int: priority
	* int: descriptor
	*/

	BC_REGISTER_LOOPER = _IO('c', 11),
	/*
	* No parameters.
	* Register a spawned looper thread with the device.
	*/

	BC_ENTER_LOOPER = _IO('c', 12),
	BC_EXIT_LOOPER = _IO('c', 13),
	/*
	* No parameters.
	* These two commands are sent as an application-level thread
	* enters and exits the binder loop, respectively. They are
	* used so the binder can have an accurate count of the number
	* of looping threads it has available.
	*/

	BC_REQUEST_DEATH_NOTIFICATION = _IOW('c', 14, struct binder_ptr_cookie),
	/*
	* void *: ptr to binder
	* void *: cookie
	*/

	BC_CLEAR_DEATH_NOTIFICATION = _IOW('c', 15, struct binder_ptr_cookie),
	/*
	* void *: ptr to binder
	* void *: cookie
	*/

	BC_DEAD_BINDER_DONE = _IOW('c', 16, void *),
	/*
	* void *: cookie
	*/
	};

	#endif /* _LINUX_BINDER_H */