/* * 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 0x85enum {	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 */