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+/*
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+ * Copyright (C) 2008 Google, Inc.
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+ *
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+ * Based on, but no longer compatible with, the original
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+ * OpenBinder.org binder driver interface, which is:
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+ *
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+ * Copyright (c) 2005 Palmsource, Inc.
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+ *
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+ * This software is licensed under the terms of the GNU General Public
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+ * License version 2, as published by the Free Software Foundation, and
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+ * may be copied, distributed, and modified under those terms.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ */
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+
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+#ifndef _UAPI_LINUX_BINDER_H
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+#define _UAPI_LINUX_BINDER_H
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+
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+#include <linux/ioctl.h>
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+
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+#define B_PACK_CHARS(c1, c2, c3, c4) \
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+ ((((c1)<<24)) | (((c2)<<16)) | (((c3)<<8)) | (c4))
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+#define B_TYPE_LARGE 0x85
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+
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+enum {
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+ BINDER_TYPE_BINDER = B_PACK_CHARS('s', 'b', '*', B_TYPE_LARGE),
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+ BINDER_TYPE_WEAK_BINDER = B_PACK_CHARS('w', 'b', '*', B_TYPE_LARGE),
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+ BINDER_TYPE_HANDLE = B_PACK_CHARS('s', 'h', '*', B_TYPE_LARGE),
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+ BINDER_TYPE_WEAK_HANDLE = B_PACK_CHARS('w', 'h', '*', B_TYPE_LARGE),
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+ BINDER_TYPE_FD = B_PACK_CHARS('f', 'd', '*', B_TYPE_LARGE),
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+};
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+
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+enum {
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+ FLAT_BINDER_FLAG_PRIORITY_MASK = 0xff,
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+ FLAT_BINDER_FLAG_ACCEPTS_FDS = 0x100,
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+};
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+
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+/*
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+ * This is the flattened representation of a Binder object for transfer
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+ * between processes. The 'offsets' supplied as part of a binder transaction
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+ * contains offsets into the data where these structures occur. The Binder
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+ * driver takes care of re-writing the structure type and data as it moves
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+ * between processes.
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+ */
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+struct flat_binder_object {
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+ /* 8 bytes for large_flat_header. */
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+ __u32 type;
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+ __u32 flags;
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+
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+ /* 8 bytes of data. */
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+ union {
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+ void __user *binder; /* local object */
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+ __u32 handle; /* remote object */
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+ };
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+
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+ /* extra data associated with local object */
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+ void __user *cookie;
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+};
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+
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+/*
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+ * On 64-bit platforms where user code may run in 32-bits the driver must
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+ * translate the buffer (and local binder) addresses appropriately.
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+ */
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+
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+struct binder_write_read {
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+ size_t write_size; /* bytes to write */
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+ size_t write_consumed; /* bytes consumed by driver */
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+ unsigned long write_buffer;
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+ size_t read_size; /* bytes to read */
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+ size_t read_consumed; /* bytes consumed by driver */
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+ unsigned long read_buffer;
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+};
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+
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+/* Use with BINDER_VERSION, driver fills in fields. */
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+struct binder_version {
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+ /* driver protocol version -- increment with incompatible change */
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+ __s32 protocol_version;
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+};
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+
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+/* This is the current protocol version. */
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+#define BINDER_CURRENT_PROTOCOL_VERSION 7
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+
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+#define BINDER_WRITE_READ _IOWR('b', 1, struct binder_write_read)
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+#define BINDER_SET_IDLE_TIMEOUT _IOW('b', 3, __s64)
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+#define BINDER_SET_MAX_THREADS _IOW('b', 5, __u32)
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+#define BINDER_SET_IDLE_PRIORITY _IOW('b', 6, __s32)
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+#define BINDER_SET_CONTEXT_MGR _IOW('b', 7, __s32)
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+#define BINDER_THREAD_EXIT _IOW('b', 8, __s32)
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+#define BINDER_VERSION _IOWR('b', 9, struct binder_version)
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+
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+/*
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+ * NOTE: Two special error codes you should check for when calling
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+ * in to the driver are:
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+ *
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+ * EINTR -- The operation has been interupted. This should be
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+ * handled by retrying the ioctl() until a different error code
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+ * is returned.
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+ *
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+ * ECONNREFUSED -- The driver is no longer accepting operations
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+ * from your process. That is, the process is being destroyed.
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+ * You should handle this by exiting from your process. Note
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+ * that once this error code is returned, all further calls to
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+ * the driver from any thread will return this same code.
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+ */
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+
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+enum transaction_flags {
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+ TF_ONE_WAY = 0x01, /* this is a one-way call: async, no return */
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+ TF_ROOT_OBJECT = 0x04, /* contents are the component's root object */
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+ TF_STATUS_CODE = 0x08, /* contents are a 32-bit status code */
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+ TF_ACCEPT_FDS = 0x10, /* allow replies with file descriptors */
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+};
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+
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+struct binder_transaction_data {
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+ /* The first two are only used for bcTRANSACTION and brTRANSACTION,
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+ * identifying the target and contents of the transaction.
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+ */
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+ union {
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+ __u32 handle; /* target descriptor of command transaction */
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+ void *ptr; /* target descriptor of return transaction */
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+ } target;
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+ void *cookie; /* target object cookie */
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+ __u32 code; /* transaction command */
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+
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+ /* General information about the transaction. */
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+ __u32 flags;
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+ pid_t sender_pid;
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+ uid_t sender_euid;
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+ size_t data_size; /* number of bytes of data */
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+ size_t offsets_size; /* number of bytes of offsets */
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+
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+ /* If this transaction is inline, the data immediately
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+ * follows here; otherwise, it ends with a pointer to
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+ * the data buffer.
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+ */
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+ union {
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+ struct {
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+ /* transaction data */
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+ const void __user *buffer;
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+ /* offsets from buffer to flat_binder_object structs */
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+ const void __user *offsets;
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+ } ptr;
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+ __u8 buf[8];
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+ } data;
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+};
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+
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+struct binder_ptr_cookie {
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+ void *ptr;
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+ void *cookie;
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+};
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+
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+struct binder_pri_desc {
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+ __s32 priority;
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+ __u32 desc;
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+};
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+
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+struct binder_pri_ptr_cookie {
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+ __s32 priority;
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+ void *ptr;
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+ void *cookie;
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+};
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+
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+enum binder_driver_return_protocol {
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+ BR_ERROR = _IOR('r', 0, __s32),
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+ /*
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+ * int: error code
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+ */
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+
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+ BR_OK = _IO('r', 1),
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+ /* No parameters! */
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+
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+ BR_TRANSACTION = _IOR('r', 2, struct binder_transaction_data),
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+ BR_REPLY = _IOR('r', 3, struct binder_transaction_data),
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+ /*
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+ * binder_transaction_data: the received command.
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+ */
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+
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+ BR_ACQUIRE_RESULT = _IOR('r', 4, __s32),
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+ /*
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+ * not currently supported
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+ * int: 0 if the last bcATTEMPT_ACQUIRE was not successful.
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+ * Else the remote object has acquired a primary reference.
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+ */
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+
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+ BR_DEAD_REPLY = _IO('r', 5),
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+ /*
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+ * The target of the last transaction (either a bcTRANSACTION or
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+ * a bcATTEMPT_ACQUIRE) is no longer with us. No parameters.
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+ */
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+
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+ BR_TRANSACTION_COMPLETE = _IO('r', 6),
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+ /*
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+ * No parameters... always refers to the last transaction requested
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+ * (including replies). Note that this will be sent even for
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+ * asynchronous transactions.
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+ */
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+
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+ BR_INCREFS = _IOR('r', 7, struct binder_ptr_cookie),
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+ BR_ACQUIRE = _IOR('r', 8, struct binder_ptr_cookie),
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+ BR_RELEASE = _IOR('r', 9, struct binder_ptr_cookie),
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+ BR_DECREFS = _IOR('r', 10, struct binder_ptr_cookie),
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+ /*
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+ * void *: ptr to binder
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+ * void *: cookie for binder
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+ */
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+
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+ BR_ATTEMPT_ACQUIRE = _IOR('r', 11, struct binder_pri_ptr_cookie),
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+ /*
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+ * not currently supported
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+ * int: priority
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+ * void *: ptr to binder
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+ * void *: cookie for binder
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+ */
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+
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+ BR_NOOP = _IO('r', 12),
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+ /*
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+ * No parameters. Do nothing and examine the next command. It exists
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+ * primarily so that we can replace it with a BR_SPAWN_LOOPER command.
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+ */
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+
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+ BR_SPAWN_LOOPER = _IO('r', 13),
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+ /*
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+ * No parameters. The driver has determined that a process has no
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+ * threads waiting to service incoming transactions. When a process
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+ * receives this command, it must spawn a new service thread and
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+ * register it via bcENTER_LOOPER.
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+ */
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+
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+ BR_FINISHED = _IO('r', 14),
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+ /*
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+ * not currently supported
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+ * stop threadpool thread
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+ */
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+
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+ BR_DEAD_BINDER = _IOR('r', 15, void *),
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+ /*
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+ * void *: cookie
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+ */
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+ BR_CLEAR_DEATH_NOTIFICATION_DONE = _IOR('r', 16, void *),
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+ /*
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+ * void *: cookie
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+ */
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+
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+ BR_FAILED_REPLY = _IO('r', 17),
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+ /*
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+ * The the last transaction (either a bcTRANSACTION or
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+ * a bcATTEMPT_ACQUIRE) failed (e.g. out of memory). No parameters.
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+ */
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+};
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+
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+enum binder_driver_command_protocol {
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+ BC_TRANSACTION = _IOW('c', 0, struct binder_transaction_data),
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+ BC_REPLY = _IOW('c', 1, struct binder_transaction_data),
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+ /*
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+ * binder_transaction_data: the sent command.
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+ */
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+
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+ BC_ACQUIRE_RESULT = _IOW('c', 2, __s32),
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+ /*
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+ * not currently supported
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+ * int: 0 if the last BR_ATTEMPT_ACQUIRE was not successful.
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+ * Else you have acquired a primary reference on the object.
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+ */
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+
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+ BC_FREE_BUFFER = _IOW('c', 3, void *),
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+ /*
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+ * void *: ptr to transaction data received on a read
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+ */
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+
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+ BC_INCREFS = _IOW('c', 4, __u32),
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+ BC_ACQUIRE = _IOW('c', 5, __u32),
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+ BC_RELEASE = _IOW('c', 6, __u32),
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+ BC_DECREFS = _IOW('c', 7, __u32),
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+ /*
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+ * int: descriptor
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+ */
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+
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+ BC_INCREFS_DONE = _IOW('c', 8, struct binder_ptr_cookie),
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+ BC_ACQUIRE_DONE = _IOW('c', 9, struct binder_ptr_cookie),
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+ /*
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+ * void *: ptr to binder
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+ * void *: cookie for binder
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+ */
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+
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+ BC_ATTEMPT_ACQUIRE = _IOW('c', 10, struct binder_pri_desc),
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+ /*
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+ * not currently supported
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+ * int: priority
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+ * int: descriptor
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+ */
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+
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+ BC_REGISTER_LOOPER = _IO('c', 11),
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+ /*
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+ * No parameters.
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+ * Register a spawned looper thread with the device.
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+ */
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+
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+ BC_ENTER_LOOPER = _IO('c', 12),
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+ BC_EXIT_LOOPER = _IO('c', 13),
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+ /*
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+ * No parameters.
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+ * These two commands are sent as an application-level thread
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+ * enters and exits the binder loop, respectively. They are
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+ * used so the binder can have an accurate count of the number
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+ * of looping threads it has available.
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+ */
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+
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+ BC_REQUEST_DEATH_NOTIFICATION = _IOW('c', 14, struct binder_ptr_cookie),
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+ /*
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+ * void *: ptr to binder
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+ * void *: cookie
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+ */
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+
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+ BC_CLEAR_DEATH_NOTIFICATION = _IOW('c', 15, struct binder_ptr_cookie),
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+ /*
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+ * void *: ptr to binder
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+ * void *: cookie
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+ */
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+
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+ BC_DEAD_BINDER_DONE = _IOW('c', 16, void *),
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+ /*
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+ * void *: cookie
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+ */
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+};
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+
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+#endif /* _UAPI_LINUX_BINDER_H */
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+
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Colin Cross