WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/include/ipc/ipc.h


/*
 * Copyright (C) 2006 Ondrej Palkovsky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef __IPC_H__
#define __IPC_H__
 
/* Length of data being transfered with IPC call */
/* - the uspace may not be able to utilize full length */
#define IPC_CALL_LEN    4
 
/** Maximum active async calls per thread */
#define IPC_MAX_ASYNC_CALLS  4
 
/* Flags for calls */
#define IPC_CALL_ANSWERED       (1<<0) /**< This is answer to a call */
#define IPC_CALL_STATIC_ALLOC   (1<<1) /**< This call will not be freed on error */
#define IPC_CALL_DISCARD_ANSWER (1<<2) /**< Answer will not be passed to
                    * userspace, will be discarded */
#define IPC_CALL_FORWARDED      (1<<3) /* Call was forwarded */
#define IPC_CALL_CONN_ME_TO     (1<<4) /* Identify connect_me_to answer */
#define IPC_CALL_NOTIF          (1<<5) /* Interrupt notification */
 
/* Flags of callid (the addresses are aligned at least to 4,
 * that is why we can use bottom 2 bits of the call address
 */
#define IPC_CALLID_ANSWERED       1 /**< Type of this msg is 'answer' */
#define IPC_CALLID_NOTIFICATION   2 /**< Type of this msg is 'notification' */
 
/* Return values from IPC_ASYNC */
#define IPC_CALLRET_FATAL         -1
#define IPC_CALLRET_TEMPORARY     -2
 
 
/* Macros for manipulating calling data */
#define IPC_SET_RETVAL(data, retval)   ((data).args[0] = (retval))
#define IPC_SET_METHOD(data, val)   ((data).args[0] = (val))
#define IPC_SET_ARG1(data, val)   ((data).args[1] = (val))
#define IPC_SET_ARG2(data, val)   ((data).args[2] = (val))
#define IPC_SET_ARG3(data, val)   ((data).args[3] = (val))
 
#define IPC_GET_METHOD(data)           ((data).args[0])
#define IPC_GET_RETVAL(data)           ((data).args[0])
 
#define IPC_GET_ARG1(data)              ((data).args[1])
#define IPC_GET_ARG2(data)              ((data).args[2])
#define IPC_GET_ARG3(data)              ((data).args[3])
 
/* Well known phone descriptors */
#define PHONE_NS              0
 
/* System-specific methods - only through special syscalls
 * These methods have special behaviour
 */
/** Protocol for CONNECT - TO - ME
 *
 * Calling process asks the callee to create a callback connection,
 * so that it can start initiating new messages.
 *
 * The protocol for negotiating is:
 * - sys_connect_to_me - sends a message IPC_M_CONNECTTOME
 * - sys_wait_for_call - upon receipt tries to allocate new phone
 *                       - if it fails, responds with ELIMIT
 *                     - passes call to userspace. If userspace
 *                       responds with error, phone is deallocated and
 *                       error is sent back to caller. Otherwise
 *                       the call is accepted and the response is sent back.
 *                     - the allocated phoneid is passed to userspace
 *                       (on the receiving sid) as ARG3 of the call.
 *                     - the caller obtains taskid of the called thread
 */
#define IPC_M_CONNECT_TO_ME     1
/** Protocol for CONNECT - ME - TO
 *
 * Calling process asks the callee to create for him a new connection.
 * E.g. the caller wants a name server to connect him to print server.
 *
 * The protocol for negotiating is:
 * - sys_connect_me_to - send a synchronous message to name server
 *                       indicating that it wants to be connected to some
 *                       service
 *                     - arg1/2 are user specified, arg3 contains
 *                       address of the phone that should be connected
 *                       (TODO: it leaks to userspace)
 *   recipient         -  if ipc_answer == 0, then accept connection
 *                     -  otherwise connection refused
 *                     -  recepient may forward message. Forwarding
 *                        system message
 *
 */
#define IPC_M_CONNECT_ME_TO     2
/** This message is sent to answerbox when the phone
 * is hung up
 */
#define IPC_M_PHONE_HUNGUP      3
/** Interrupt notification */
#define IPC_M_INTERRUPT         4
 
/** Send as_area over IPC
 * - ARG1 - src base address
 * - ARG2 - size of src as(filled automatically by kernel)
 * - ARG3 - flags of the area being sent
 * - on answer ARG1 - dst base adress
 */
#define IPC_M_AS_AREA_SEND      5
 
/** Get as_area over IPC
 * - ARG1 - Where the area will be mapped
 * - ARG2 - Expected size of area
 * - ARG3 - User defined argument
 * on answer - the server sets ARG1 as src as address of the as_area
 * to be shared, ARG2 is set to rights that will be used for sharing,
 * which is returned as part of answer back to the receiver
 */
#define IPC_M_AS_AREA_RECV      6
 
 
/* Well-known methods */
#define IPC_M_LAST_SYSTEM     511
#define IPC_M_PING            512
/* User methods */
#define FIRST_USER_METHOD     1024
 
#ifdef KERNEL
 
#include <synch/mutex.h>
#include <synch/condvar.h>
#include <adt/list.h>
 
#define IPC_MAX_PHONES  16
 
typedef struct answerbox_s answerbox_t;
typedef struct phone_s phone_t;
typedef struct {
    __native args[IPC_CALL_LEN];
    phone_t *phone;
}ipc_data_t;
 
struct answerbox_s {
    SPINLOCK_DECLARE(lock);
 
    task_t *task;
 
    waitq_t wq;
 
    link_t connected_phones; /**< Phones connected to this answerbox */
    link_t calls;            /**< Received calls */
    link_t dispatched_calls; /* Should be hash table in the future */
 
    link_t answers;          /**< Answered calls */
 
    SPINLOCK_DECLARE(irq_lock);
    link_t irq_notifs;       /**< Notifications from IRQ handlers */
};
 
typedef enum {
    IPC_BUSY_FREE = 0,
    IPC_BUSY_CONNECTING,
    IPC_BUSY_CONNECTED
} ipc_busy_t;
 
struct phone_s {
    SPINLOCK_DECLARE(lock);
    link_t list;
    answerbox_t *callee;
    ipc_busy_t busy;
    atomic_t active_calls;
};
 
typedef struct {
    link_t list;
 
    int flags;
 
    /* Identification of the caller */
    task_t *sender;
    /* The caller box is different from sender->answerbox
     * for synchronous calls
     */
    answerbox_t *callerbox;
 
    __native private; /**< Private data to internal IPC */
 
    ipc_data_t data;  /**< Data passed from/to userspace */
}call_t;
 
extern void ipc_init(void);
extern call_t * ipc_wait_for_call(answerbox_t *box, __u32 usec, int flags);
extern void ipc_answer(answerbox_t *box, call_t *request);
extern int ipc_call(phone_t *phone, call_t *call);
extern void ipc_call_sync(phone_t *phone, call_t *request);
extern void ipc_phone_init(phone_t *phone);
extern void ipc_phone_connect(phone_t *phone, answerbox_t *box);
extern void ipc_call_free(call_t *call);
extern call_t * ipc_call_alloc(int flags);
extern void ipc_answerbox_init(answerbox_t *box);
extern void ipc_call_static_init(call_t *call);
extern void task_print_list(void);
extern int ipc_forward(call_t *call, phone_t *newphone, answerbox_t *oldbox);
extern void ipc_cleanup(task_t *task);
extern int ipc_phone_hangup(phone_t *phone);
extern void ipc_backsend_err(phone_t *phone, call_t *call, __native err);
 
extern answerbox_t *ipc_phone_0;
 
#endif
 
#endif
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/include/ipc/ipc.h – Rev 1461 → 1502

Rev 1461		Rev 1502
1	/*	1	/*
2	* Copyright (C) 2006 Ondrej Palkovsky	2	* Copyright (C) 2006 Ondrej Palkovsky
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#ifndef __IPC_H__	29	#ifndef __IPC_H__
30	#define __IPC_H__	30	#define __IPC_H__
31		31
32	/* Length of data being transfered with IPC call */	32	/* Length of data being transfered with IPC call */
33	/* - the uspace may not be able to utilize full length */	33	/* - the uspace may not be able to utilize full length */
34	#define IPC_CALL_LEN 4	34	#define IPC_CALL_LEN 4
35		35
36	/** Maximum active async calls per thread */	36	/** Maximum active async calls per thread */
37	#define IPC_MAX_ASYNC_CALLS 4	37	#define IPC_MAX_ASYNC_CALLS 4
38		38
39	/* Flags for calls */	39	/* Flags for calls */
40	#define IPC_CALL_ANSWERED (1<<0) /*< This is answer to a call /	40	#define IPC_CALL_ANSWERED (1<<0) /*< This is answer to a call /
41	#define IPC_CALL_STATIC_ALLOC (1<<1) /*< This call will not be freed on error /	41	#define IPC_CALL_STATIC_ALLOC (1<<1) /*< This call will not be freed on error /
42	#define IPC_CALL_DISCARD_ANSWER (1<<2) /**< Answer will not be passed to	42	#define IPC_CALL_DISCARD_ANSWER (1<<2) /**< Answer will not be passed to
43	* userspace, will be discarded */	43	* userspace, will be discarded */
44	#define IPC_CALL_FORWARDED (1<<3) /* Call was forwarded */	44	#define IPC_CALL_FORWARDED (1<<3) /* Call was forwarded */
45	#define IPC_CALL_CONN_ME_TO (1<<4) /* Identify connect_me_to answer */	45	#define IPC_CALL_CONN_ME_TO (1<<4) /* Identify connect_me_to answer */
46	#define IPC_CALL_NOTIF (1<<5) /* Interrupt notification */	46	#define IPC_CALL_NOTIF (1<<5) /* Interrupt notification */
47		47
48	/* Flags of callid (the addresses are aligned at least to 4,	48	/* Flags of callid (the addresses are aligned at least to 4,
49	* that is why we can use bottom 2 bits of the call address	49	* that is why we can use bottom 2 bits of the call address
50	*/	50	*/
51	#define IPC_CALLID_ANSWERED 1 /*< Type of this msg is 'answer' /	51	#define IPC_CALLID_ANSWERED 1 /*< Type of this msg is 'answer' /
52	#define IPC_CALLID_NOTIFICATION 2 /*< Type of this msg is 'notification' /	52	#define IPC_CALLID_NOTIFICATION 2 /*< Type of this msg is 'notification' /
53		53
54	/* Return values from IPC_ASYNC */	54	/* Return values from IPC_ASYNC */
55	#define IPC_CALLRET_FATAL -1	55	#define IPC_CALLRET_FATAL -1
56	#define IPC_CALLRET_TEMPORARY -2	56	#define IPC_CALLRET_TEMPORARY -2
57		57
58		58
59	/* Macros for manipulating calling data */	59	/* Macros for manipulating calling data */
60	#define IPC_SET_RETVAL(data, retval) ((data).args[0] = (retval))	60	#define IPC_SET_RETVAL(data, retval) ((data).args[0] = (retval))
61	#define IPC_SET_METHOD(data, val) ((data).args[0] = (val))	61	#define IPC_SET_METHOD(data, val) ((data).args[0] = (val))
62	#define IPC_SET_ARG1(data, val) ((data).args[1] = (val))	62	#define IPC_SET_ARG1(data, val) ((data).args[1] = (val))
63	#define IPC_SET_ARG2(data, val) ((data).args[2] = (val))	63	#define IPC_SET_ARG2(data, val) ((data).args[2] = (val))
64	#define IPC_SET_ARG3(data, val) ((data).args[3] = (val))	64	#define IPC_SET_ARG3(data, val) ((data).args[3] = (val))
65		65
66	#define IPC_GET_METHOD(data) ((data).args[0])	66	#define IPC_GET_METHOD(data) ((data).args[0])
67	#define IPC_GET_RETVAL(data) ((data).args[0])	67	#define IPC_GET_RETVAL(data) ((data).args[0])
68		68
69	#define IPC_GET_ARG1(data) ((data).args[1])	69	#define IPC_GET_ARG1(data) ((data).args[1])
70	#define IPC_GET_ARG2(data) ((data).args[2])	70	#define IPC_GET_ARG2(data) ((data).args[2])
71	#define IPC_GET_ARG3(data) ((data).args[3])	71	#define IPC_GET_ARG3(data) ((data).args[3])
72		72
73	/* Well known phone descriptors */	73	/* Well known phone descriptors */
74	#define PHONE_NS 0	74	#define PHONE_NS 0
75		75
76	/* System-specific methods - only through special syscalls	76	/* System-specific methods - only through special syscalls
77	* These methods have special behaviour	77	* These methods have special behaviour
78	*/	78	*/
79	/** Protocol for CONNECT - TO - ME	79	/** Protocol for CONNECT - TO - ME
80	*	80	*
81	* Calling process asks the callee to create a callback connection,	81	* Calling process asks the callee to create a callback connection,
82	* so that it can start initiating new messages.	82	* so that it can start initiating new messages.
83	*	83	*
84	* The protocol for negotiating is:	84	* The protocol for negotiating is:
85	* - sys_connect_to_me - sends a message IPC_M_CONNECTTOME	85	* - sys_connect_to_me - sends a message IPC_M_CONNECTTOME
86	* - sys_wait_for_call - upon receipt tries to allocate new phone	86	* - sys_wait_for_call - upon receipt tries to allocate new phone
87	* - if it fails, responds with ELIMIT	87	* - if it fails, responds with ELIMIT
88	* - passes call to userspace. If userspace	88	* - passes call to userspace. If userspace
89	* responds with error, phone is deallocated and	89	* responds with error, phone is deallocated and
90	* error is sent back to caller. Otherwise	90	* error is sent back to caller. Otherwise
91	* the call is accepted and the response is sent back.	91	* the call is accepted and the response is sent back.
92	* - the allocated phoneid is passed to userspace	92	* - the allocated phoneid is passed to userspace
93	* (on the receiving sid) as ARG3 of the call.	93	* (on the receiving sid) as ARG3 of the call.
94	* - the caller obtains taskid of the called thread	94	* - the caller obtains taskid of the called thread
95	*/	95	*/
96	#define IPC_M_CONNECT_TO_ME 1	96	#define IPC_M_CONNECT_TO_ME 1
97	/** Protocol for CONNECT - ME - TO	97	/** Protocol for CONNECT - ME - TO
98	*	98	*
99	* Calling process asks the callee to create for him a new connection.	99	* Calling process asks the callee to create for him a new connection.
100	* E.g. the caller wants a name server to connect him to print server.	100	* E.g. the caller wants a name server to connect him to print server.
101	*	101	*
102	* The protocol for negotiating is:	102	* The protocol for negotiating is:
103	* - sys_connect_me_to - send a synchronous message to name server	103	* - sys_connect_me_to - send a synchronous message to name server
104	* indicating that it wants to be connected to some	104	* indicating that it wants to be connected to some
105	* service	105	* service
106	* - arg1/2 are user specified, arg3 contains	106	* - arg1/2 are user specified, arg3 contains
107	* address of the phone that should be connected	107	* address of the phone that should be connected
108	* (TODO: it leaks to userspace)	108	* (TODO: it leaks to userspace)
109	* recipient - if ipc_answer == 0, then accept connection	109	* recipient - if ipc_answer == 0, then accept connection
110	* - otherwise connection refused	110	* - otherwise connection refused
111	* - recepient may forward message. Forwarding	111	* - recepient may forward message. Forwarding
112	* system message	112	* system message
113	*	113	*
114	*/	114	*/
115	#define IPC_M_CONNECT_ME_TO 2	115	#define IPC_M_CONNECT_ME_TO 2
116	/** This message is sent to answerbox when the phone	116	/** This message is sent to answerbox when the phone
117	* is hung up	117	* is hung up
118	*/	118	*/
119	#define IPC_M_PHONE_HUNGUP 3	119	#define IPC_M_PHONE_HUNGUP 3
120	/** Interrupt notification */	120	/** Interrupt notification */
121	#define IPC_M_INTERRUPT 4	121	#define IPC_M_INTERRUPT 4
122		122
123	/** Send as_area over IPC	123	/** Send as_area over IPC
124	* - ARG1 - src base address	124	* - ARG1 - src base address
125	* - ARG2 - size of src as(filled automatically by kernel)	125	* - ARG2 - size of src as(filled automatically by kernel)
126	* - ARG3 - flags of the area being sent	126	* - ARG3 - flags of the area being sent
127	* - on answer ARG1 - dst base adress	127	* - on answer ARG1 - dst base adress
128	*/	128	*/
129	#define IPC_M_AS_AREA_SEND 5	129	#define IPC_M_AS_AREA_SEND 5
130		130
131	/** Get as_area over IPC	131	/** Get as_area over IPC
132	* - ARG1 - Where the area will be mapped	132	* - ARG1 - Where the area will be mapped
133	* - ARG2 - Expected size of area	133	* - ARG2 - Expected size of area
134	* - ARG3 - User defined argument	134	* - ARG3 - User defined argument
135	* on answer - the server sets ARG1 as src as address of the as_area	135	* on answer - the server sets ARG1 as src as address of the as_area
136	* to be shared, ARG2 is set to rights that will be used for sharing,	136	* to be shared, ARG2 is set to rights that will be used for sharing,
137	* which is returned as part of answer back to the receiver	137	* which is returned as part of answer back to the receiver
138	*/	138	*/
139	#define IPC_M_AS_AREA_RECV 6	139	#define IPC_M_AS_AREA_RECV 6
140		140
141		141
142	/* Well-known methods */	142	/* Well-known methods */
143	#define IPC_M_LAST_SYSTEM 511	143	#define IPC_M_LAST_SYSTEM 511
144	#define IPC_M_PING 512	144	#define IPC_M_PING 512
145	/* User methods */	145	/* User methods */
146	#define FIRST_USER_METHOD 1024	146	#define FIRST_USER_METHOD 1024
147		147
148	#ifdef KERNEL	148	#ifdef KERNEL
149		149
150	#include <synch/mutex.h>	150	#include <synch/mutex.h>
151	#include <synch/condvar.h>	151	#include <synch/condvar.h>
152	#include <adt/list.h>	152	#include <adt/list.h>
153		153
154	#define IPC_MAX_PHONES 16	154	#define IPC_MAX_PHONES 16
155		155
156	typedef struct answerbox_s answerbox_t;	156	typedef struct answerbox_s answerbox_t;
157	typedef struct phone_s phone_t;	157	typedef struct phone_s phone_t;
158	typedef struct {	158	typedef struct {
159	__native args[IPC_CALL_LEN];	159	__native args[IPC_CALL_LEN];
160	phone_t *phone;	160	phone_t *phone;
161	}ipc_data_t;	161	}ipc_data_t;
162		162
163	struct answerbox_s {	163	struct answerbox_s {
164	SPINLOCK_DECLARE(lock);	164	SPINLOCK_DECLARE(lock);
165		165
166	task_t *task;	166	task_t *task;
167		167
168	waitq_t wq;	168	waitq_t wq;
169		169
170	link_t connected_phones; /*< Phones connected to this answerbox /	170	link_t connected_phones; /*< Phones connected to this answerbox /
171	link_t calls; /*< Received calls /	171	link_t calls; /*< Received calls /
172	link_t dispatched_calls; /* Should be hash table in the future */	172	link_t dispatched_calls; /* Should be hash table in the future */
173		173
174	link_t answers; /*< Answered calls /	174	link_t answers; /*< Answered calls /
175		175
176	SPINLOCK_DECLARE(irq_lock);	176	SPINLOCK_DECLARE(irq_lock);
177	link_t irq_notifs; /*< Notifications from IRQ handlers /	177	link_t irq_notifs; /*< Notifications from IRQ handlers /
178	};	178	};
179		179
180	typedef enum {	180	typedef enum {
181	IPC_BUSY_FREE = 0,	181	IPC_BUSY_FREE = 0,
182	IPC_BUSY_CONNECTING,	182	IPC_BUSY_CONNECTING,
183	IPC_BUSY_CONNECTED	183	IPC_BUSY_CONNECTED
184	} ipc_busy_t;	184	} ipc_busy_t;
185		185
186	struct phone_s {	186	struct phone_s {
187	SPINLOCK_DECLARE(lock);	187	SPINLOCK_DECLARE(lock);
188	link_t list;	188	link_t list;
189	answerbox_t *callee;	189	answerbox_t *callee;
190	ipc_busy_t busy;	190	ipc_busy_t busy;
191	atomic_t active_calls;	191	atomic_t active_calls;
192	};	192	};
193		193
194	typedef struct {	194	typedef struct {
195	link_t list;	195	link_t list;
196		196
197	int flags;	197	int flags;
198		198
199	/* Identification of the caller */	199	/* Identification of the caller */
200	task_t *sender;	200	task_t *sender;
201	/* The caller box is different from sender->answerbox	201	/* The caller box is different from sender->answerbox
202	* for synchronous calls	202	* for synchronous calls
203	*/	203	*/
204	answerbox_t *callerbox;	204	answerbox_t *callerbox;
205		205
206	__native private; /*< Private data to internal IPC /	206	__native private; /*< Private data to internal IPC /
207		207
208	ipc_data_t data; /*< Data passed from/to userspace /	208	ipc_data_t data; /*< Data passed from/to userspace /
209	}call_t;	209	}call_t;
210		210
211	extern void ipc_init(void);	211	extern void ipc_init(void);
212	extern call_t * ipc_wait_for_call(answerbox_t *box, __u32 usec, int nonblocking);	212	extern call_t * ipc_wait_for_call(answerbox_t *box, __u32 usec, int flags);
213	extern void ipc_answer(answerbox_t box, call_t request);	213	extern void ipc_answer(answerbox_t box, call_t request);
214	extern int ipc_call(phone_t phone, call_t call);	214	extern int ipc_call(phone_t phone, call_t call);
215	extern void ipc_call_sync(phone_t phone, call_t request);	215	extern void ipc_call_sync(phone_t phone, call_t request);
216	extern void ipc_phone_init(phone_t *phone);	216	extern void ipc_phone_init(phone_t *phone);
217	extern void ipc_phone_connect(phone_t phone, answerbox_t box);	217	extern void ipc_phone_connect(phone_t phone, answerbox_t box);
218	extern void ipc_call_free(call_t *call);	218	extern void ipc_call_free(call_t *call);
219	extern call_t * ipc_call_alloc(int flags);	219	extern call_t * ipc_call_alloc(int flags);
220	extern void ipc_answerbox_init(answerbox_t *box);	220	extern void ipc_answerbox_init(answerbox_t *box);
221	extern void ipc_call_static_init(call_t *call);	221	extern void ipc_call_static_init(call_t *call);
222	extern void task_print_list(void);	222	extern void task_print_list(void);
223	extern int ipc_forward(call_t call, phone_t newphone, answerbox_t *oldbox);	223	extern int ipc_forward(call_t call, phone_t newphone, answerbox_t *oldbox);
224	extern void ipc_cleanup(task_t *task);	224	extern void ipc_cleanup(task_t *task);
225	extern int ipc_phone_hangup(phone_t *phone);	225	extern int ipc_phone_hangup(phone_t *phone);
226	extern void ipc_backsend_err(phone_t phone, call_t call, __native err);	226	extern void ipc_backsend_err(phone_t phone, call_t call, __native err);
227		227
228	extern answerbox_t *ipc_phone_0;	228	extern answerbox_t *ipc_phone_0;
229		229
230	#endif	230	#endif
231		231
232	#endif	232	#endif
233		233