MPSAFE locking for the ahc/ahd drivers using lockmgr locks.
[dragonfly.git] / sys / dev / disk / aic7xxx / aic_osm_lib.c
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1/*
2 * FreeBSD OSM Library for the aic7xxx aic79xx based Adaptec SCSI controllers
3 *
4 * Copyright (c) 1994-2002 Justin T. Gibbs.
5 * Copyright (c) 2001-2003 Adaptec Inc.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification.
14 * 2. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * Alternatively, this software may be distributed under the terms of the
18 * GNU Public License ("GPL").
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
24 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/aic_osm_lib.c#5 $
33 *
dff3fb2d 34 * $FreeBSD: src/sys/dev/aic7xxx/aic_osm_lib.c,v 1.3 2004/08/17 00:14:31 gibbs Exp $
ef8ef949 35 * $DragonFly: src/sys/dev/disk/aic7xxx/aic_osm_lib.c,v 1.3 2008/02/09 18:13:13 pavalos Exp $
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36 */
37
38static void aic_recovery_thread(void *arg);
39
40void
41aic_set_recoveryscb(struct aic_softc *aic, struct scb *scb)
42{
43
44 if ((scb->flags & SCB_RECOVERY_SCB) == 0) {
45 struct scb *list_scb;
46
47 scb->flags |= SCB_RECOVERY_SCB;
48
dff3fb2d 49 AIC_SCB_DATA(aic)->recovery_scbs++;
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50
51 /*
52 * Go through all of our pending SCBs and remove
53 * any scheduled timeouts for them. We will reschedule
54 * them after we've successfully fixed this problem.
55 */
56 LIST_FOREACH(list_scb, &aic->pending_scbs, pending_links) {
57 union ccb *ccb;
58
59 ccb = list_scb->io_ctx;
ef8ef949 60 callout_stop(&scb->io_timer);
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61 }
62 }
63}
64
65void
66aic_platform_timeout(void *arg)
67{
68 struct scb *scb;
69
70 scb = (struct scb *)arg;
ef8ef949 71 aic_lock(scb->aic_softc);
750f3593 72 aic_timeout(scb);
ef8ef949 73 aic_unlock(scb->aic_softc);
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74}
75
76int
77aic_spawn_recovery_thread(struct aic_softc *aic)
78{
79 int error;
80
81 error = aic_kthread_create(aic_recovery_thread, aic,
82 &aic->platform_data->recovery_thread,
83 /*flags*/0, /*altstack*/0, "aic_recovery%d",
84 aic->unit);
85 return (error);
86}
87
88/*
89 * Lock is not held on entry.
90 */
91void
92aic_terminate_recovery_thread(struct aic_softc *aic)
93{
94
750f3593 95 if (aic->platform_data->recovery_thread == NULL) {
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96 return;
97 }
98 aic->flags |= AIC_SHUTDOWN_RECOVERY;
99 wakeup(aic);
100 /*
101 * Sleep on a slightly different location
102 * for this interlock just for added safety.
103 */
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104 crit_enter();
105 aic_lock(aic);
106 tsleep_interlock(aic->platform_data);
107 aic_unlock(aic);
750f3593 108 tsleep(aic->platform_data, 0, "thtrm", 0);
ef8ef949 109 crit_exit();
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110}
111
112static void
113aic_recovery_thread(void *arg)
114{
115 struct aic_softc *aic;
116
750f3593 117 aic = (struct aic_softc *)arg;
ef8ef949 118 aic_lock(aic);
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119 for (;;) {
120
121 if (LIST_EMPTY(&aic->timedout_scbs) != 0
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122 && (aic->flags & AIC_SHUTDOWN_RECOVERY) == 0) {
123 crit_enter();
124 tsleep_interlock(aic);
125 aic_unlock(aic);
750f3593 126 tsleep(aic, 0, "idle", 0);
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127 aic_lock(aic);
128 crit_exit();
129 }
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130
131 if ((aic->flags & AIC_SHUTDOWN_RECOVERY) != 0)
132 break;
133
750f3593 134 aic_recover_commands(aic);
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135 }
136 aic->platform_data->recovery_thread = NULL;
137 wakeup(aic->platform_data);
ef8ef949 138 aic_unlock(aic);
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139 kthread_exit();
140}