xref: /illumos-gate/usr/src/uts/common/sys/scsi/targets/smp.h (revision 96c4a178a18cd52ee5001195f1552d9cef0c38f0)
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 /*
23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #ifndef _SYS_SCSI_TARGETS_SMP_H
28 #define	_SYS_SCSI_TARGETS_SMP_H
29 
30 #include <sys/types.h>
31 #include <sys/scsi/scsi.h>
32 
33 #ifdef	__cplusplus
34 extern "C" {
35 #endif
36 
37 #if defined(_KERNEL)
38 
39 /*
40  * smp_open_flag: field indicating open smp instance.
41  *	0 = closed, 1 = shared open, 2 = exclusive open.
42  */
43 #define	SMP_CLOSED	0
44 #define	SMP_SOPENED	1
45 #define	SMP_EXOPENED	2
46 
47 typedef struct smp_state {
48 	struct smp_device	*smp_sd;	/* pointer to smp_device */
49 	kmutex_t		smp_mutex;	/* mutex */
50 	uint32_t		smp_open_flag;	/* open flag */
51 	kcondvar_t		smp_cv;		/* condition variable */
52 	uint32_t		smp_busy;	/* busy */
53 } smp_state_t;
54 
55 #define	SMP_ESTIMATED_NUM_DEVS	4		/* for soft-state allocation */
56 #define	SMP_DEFAULT_RETRY_TIMES	5
57 
58 #define	SMP_FLAG_REQBUF		0x1
59 #define	SMP_FLAG_RSPBUF		0x2
60 #define	SMP_FLAG_XFER		0x4
61 
62 #endif /* defined(_KERNEL) */
63 
64 
65 #ifdef	__cplusplus
66 }
67 #endif
68 
69 #endif	/* _SYS_SCSI_TARGETS_SMP_H */
70