aic_osm_lib.c revision 171675 
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 171675 2007-07-31 20:11:03Z scottl $");
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			callout_stop(&scb->io_timer);
61		}
62	}
63}
64
65void
66aic_platform_timeout(void *arg)
67{
68	struct	scb *scb;
69
70	scb = (struct scb *)arg;
71	aic_lock(scb->aic_softc);
72	aic_timeout(scb);
73	aic_unlock(scb->aic_softc);
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
95	if (aic->platform_data->recovery_thread == NULL) {
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	 */
104	msleep(aic->platform_data, &aic->platform_data->mtx, PUSER, "thtrm", 0);
105}
106
107static void
108aic_recovery_thread(void *arg)
109{
110	struct aic_softc *aic;
111
112	aic = (struct aic_softc *)arg;
113	aic_lock(aic);
114	for (;;) {
115
116		if (LIST_EMPTY(&aic->timedout_scbs) != 0
117		 && (aic->flags & AIC_SHUTDOWN_RECOVERY) == 0)
118			msleep(aic, &aic->platform_data->mtx, PUSER, "idle", 0);
119
120		if ((aic->flags & AIC_SHUTDOWN_RECOVERY) != 0)
121			break;
122
123		aic_recover_commands(aic);
124	}
125	aic->platform_data->recovery_thread = NULL;
126	wakeup(aic->platform_data);
127	aic_unlock(aic);
128	kthread_exit(0);
129}
130
131void
132aic_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
133{
134#if __FreeBSD_version >= 500000
135	cam_calc_geometry(ccg, extended);
136#else
137	uint32_t size_mb;
138	uint32_t secs_per_cylinder;
139
140	size_mb = ccg->volume_size / ((1024L * 1024L) / ccg->block_size);
141	if (size_mb > 1024 && extended) {
142		ccg->heads = 255;
143		ccg->secs_per_track = 63;
144	} else {
145		ccg->heads = 64;
146		ccg->secs_per_track = 32;
147	}
148	secs_per_cylinder = ccg->heads * ccg->secs_per_track;
149	ccg->cylinders = ccg->volume_size / secs_per_cylinder;
150	ccg->ccb_h.status = CAM_REQ_CMP;
151#endif
152}
153
154