aic_osm_lib.c revision 133911 
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 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: head/sys/dev/aic7xxx/aic_osm_lib.c 133911 2004-08-17 00:14:31Z gibbs $");
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
49		AIC_SCB_DATA(aic)->recovery_scbs++;
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;
60			untimeout(aic_platform_timeout, list_scb,
61				  ccb->ccb_h.timeout_ch);
62		}
63	}
64}
65
66void
67aic_platform_timeout(void *arg)
68{
69	struct	scb *scb;
70	u_long	s;
71
72	scb = (struct scb *)arg;
73	aic_lock(scb->aic_softc, &s);
74	aic_timeout(scb);
75	aic_unlock(scb->aic_softc, &s);
76}
77
78int
79aic_spawn_recovery_thread(struct aic_softc *aic)
80{
81	int error;
82
83	error = aic_kthread_create(aic_recovery_thread, aic,
84			       &aic->platform_data->recovery_thread,
85			       /*flags*/0, /*altstack*/0, "aic_recovery%d",
86			       aic->unit);
87	return (error);
88}
89
90/*
91 * Lock is not held on entry.
92 */
93void
94aic_terminate_recovery_thread(struct aic_softc *aic)
95{
96	u_long s;
97
98	aic_lock(aic, &s);
99	if (aic->platform_data->recovery_thread == NULL) {
100		aic_unlock(aic, &s);
101		return;
102	}
103	aic->flags |= AIC_SHUTDOWN_RECOVERY;
104	wakeup(aic);
105	/*
106	 * Sleep on a slightly different location
107	 * for this interlock just for added safety.
108	 */
109	tsleep(aic->platform_data, PUSER, "thtrm", 0);
110	aic_unlock(aic, &s);
111}
112
113static void
114aic_recovery_thread(void *arg)
115{
116	struct aic_softc *aic;
117	u_long s;
118
119#if __FreeBSD_version >= 500000
120	mtx_lock(&Giant);
121#endif
122	aic = (struct aic_softc *)arg;
123	aic_lock(aic, &s);
124	for (;;) {
125
126		if (LIST_EMPTY(&aic->timedout_scbs) != 0
127		 && (aic->flags & AIC_SHUTDOWN_RECOVERY) == 0)
128			tsleep(aic, PUSER, "idle", 0);
129
130		if ((aic->flags & AIC_SHUTDOWN_RECOVERY) != 0)
131			break;
132
133		aic_unlock(aic, &s);
134		aic_recover_commands(aic);
135		aic_lock(aic, &s);
136	}
137	aic->platform_data->recovery_thread = NULL;
138	wakeup(aic->platform_data);
139	aic_unlock(aic, &s);
140#if __FreeBSD_version >= 500000
141	mtx_unlock(&Giant);
142#endif
143	kthread_exit(0);
144}
145
146void
147aic_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
148{
149#if __FreeBSD_version >= 500000
150	cam_calc_geometry(ccg, extended);
151#else
152	uint32_t size_mb;
153	uint32_t secs_per_cylinder;
154
155	size_mb = ccg->volume_size / ((1024L * 1024L) / ccg->block_size);
156	if (size_mb > 1024 && extended) {
157		ccg->heads = 255;
158		ccg->secs_per_track = 63;
159	} else {
160		ccg->heads = 64;
161		ccg->secs_per_track = 32;
162	}
163	secs_per_cylinder = ccg->heads * ccg->secs_per_track;
164	ccg->cylinders = ccg->volume_size / secs_per_cylinder;
165	ccg->ccb_h.status = CAM_REQ_CMP;
166#endif
167}
168
169