xref: /illumos-gate/usr/src/uts/common/io/scsi/adapters/iscsi/iscsi_thread.h (revision 49311b3511690f5b23558b0fba067bc8067c7a87)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #ifndef _ISCSI_THREAD_H
27 #define	_ISCSI_THREAD_H
28 
29 /*
30  * Block comment which describes the contents of this file.
31  */
32 
33 #ifdef __cplusplus
34 extern "C" {
35 #endif
36 
37 #include <sys/types.h>
38 #include <sys/ddi.h>
39 #include <sys/sunddi.h>
40 
41 #define	SIG_ISCSI_THREAD		0x54485244
42 
43 #define	ISCSI_TH_MAX_NAME_LEN		32
44 
45 #define	ISCSI_THREAD_SIGNAL_KILL	0x00000001
46 #define	ISCSI_THREAD_SIGNAL_WAKEUP	0x00000002
47 
48 #define	ISCSI_THREAD_STATE_STOPPED	0x00000001
49 #define	ISCSI_THREAD_STATE_STOPPING	0x00000002
50 #define	ISCSI_THREAD_STATE_STARTED	0x00000004
51 #define	ISCSI_THREAD_STATE_STARTING	0x00000008
52 #define	ISCSI_THREAD_STATE_DESTROYING	0x00000010
53 
54 struct _iscsi_thread;
55 
56 typedef void (*iscsi_thread_ep_t)(struct _iscsi_thread *, void *);
57 
58 typedef struct _iscsi_thread {
59 	uint32_t		signature;
60 	uint32_t		state;
61 	ddi_taskq_t		*tq;
62 	iscsi_thread_ep_t	entry_point;
63 	void			*arg;
64 	dev_info_t		*dip;
65 	struct {
66 		uint32_t	bitmap;
67 		kmutex_t	mtx;
68 		kcondvar_t	cdv;
69 	} sign;
70 	struct {
71 		kmutex_t	mtx;
72 	} mgnt;
73 } iscsi_thread_t;
74 
75 iscsi_thread_t *
76 iscsi_thread_create(
77 	dev_info_t		*dip,
78 	char			*name,
79 	iscsi_thread_ep_t	entry_point,
80 	void			*arg
81 );
82 
83 void
84 iscsi_thread_destroy(
85 	iscsi_thread_t		*thread
86 );
87 
88 boolean_t
89 iscsi_thread_start(
90 	iscsi_thread_t		*thread
91 );
92 
93 boolean_t
94 iscsi_thread_stop(
95 	iscsi_thread_t		*thread
96 );
97 
98 void
99 iscsi_thread_send_kill(
100 	iscsi_thread_t		*thread
101 );
102 
103 boolean_t
104 iscsi_thread_send_wakeup(
105 	iscsi_thread_t		*thread
106 );
107 
108 int
109 iscsi_thread_wait(
110 	iscsi_thread_t		*thread,
111 	clock_t			timeout
112 );
113 
114 uint32_t
115 iscsi_thread_check_signals(
116 	iscsi_thread_t		*thread
117 );
118 
119 #ifdef __cplusplus
120 }
121 #endif
122 
123 #endif /* _ISCSI_THREAD_H */
124