1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1998 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* support functions for hba drivers to handle scsi reset notifications.
*/
#include <sys/scsi/scsi.h>
#include <sys/scsi/impl/scsi_reset_notify.h>
/*
* routine for reset notification setup.
* The function is entered without adapter driver mutex being held.
*/
int
scsi_hba_reset_notify_setup(struct scsi_address *ap, int flag,
void (*callback)(caddr_t), caddr_t arg, kmutex_t *mutex,
struct scsi_reset_notify_entry **listp)
{
struct scsi_reset_notify_entry *p, *beforep;
int rval = DDI_FAILURE;
mutex_enter(mutex);
p = *listp;
beforep = NULL;
while (p) {
if (p->ap == ap)
break; /* An entry exist for this target */
beforep = p;
p = p->next;
}
if ((flag & SCSI_RESET_CANCEL) && (p != NULL)) {
if (beforep == NULL) {
*listp = p->next;
} else {
beforep->next = p->next;
}
kmem_free(p, sizeof (struct scsi_reset_notify_entry));
rval = DDI_SUCCESS;
} else if ((flag & SCSI_RESET_NOTIFY) && (p == NULL)) {
p = kmem_zalloc(sizeof (struct scsi_reset_notify_entry),
KM_SLEEP);
p->ap = ap;
p->callback = callback;
p->arg = arg;
p->next = *listp;
*listp = p;
rval = DDI_SUCCESS;
}
mutex_exit(mutex);
return (rval);
}
/*
* routine to deallocate the callback list
*/
void
scsi_hba_reset_notify_tear_down(struct scsi_reset_notify_entry *listp)
{
struct scsi_reset_notify_entry *p, *next;
p = listp;
while (p) {
next = p->next;
kmem_free(p, sizeof (struct scsi_reset_notify_entry));
p = next;
}
}
/*
* routine to perform the notification callbacks after a reset.
* The function is entered with adapter driver mutex being held.
*/
void
scsi_hba_reset_notify_callback(kmutex_t *mutex,
struct scsi_reset_notify_entry **listp)
{
int i, count;
struct scsi_reset_notify_entry *p;
struct notify_entry {
void (*callback)(caddr_t);
caddr_t arg;
} *list;
if ((p = *listp) == NULL)
return;
count = 0;
while (p != NULL) {
count++;
p = p->next;
}
list = kmem_alloc(count * sizeof (struct notify_entry), KM_NOSLEEP);
if (list == NULL) {
cmn_err(CE_WARN, "scsi_reset_notify: kmem_alloc failed");
return;
}
for (i = 0, p = *listp; i < count; i++, p = p->next) {
list[i].callback = p->callback;
list[i].arg = p->arg;
}
mutex_exit(mutex);
for (i = 0; i < count; i++) {
if (list[i].callback != NULL)
(void) (*list[i].callback)(list[i].arg);
}
kmem_free(list, count * sizeof (struct notify_entry));
mutex_enter(mutex);
}
|
