mlx_disk.c revision 111216 
1/*-
2 * Copyright (c) 1999 Jonathan Lemon
3 * Copyright (c) 1999 Michael Smith
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: head/sys/dev/mlx/mlx_disk.c 111216 2003-02-21 15:13:26Z phk $
28 */
29
30/*
31 * Disk driver for Mylex DAC960 RAID adapters.
32 */
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/kernel.h>
37
38#include <sys/bus.h>
39#include <sys/conf.h>
40#include <sys/devicestat.h>
41#include <sys/disk.h>
42
43#include <machine/bus.h>
44#include <sys/rman.h>
45
46#include <dev/mlx/mlx_compat.h>
47#include <dev/mlx/mlxio.h>
48#include <dev/mlx/mlxvar.h>
49#include <dev/mlx/mlxreg.h>
50
51/* prototypes */
52static int mlxd_probe(device_t dev);
53static int mlxd_attach(device_t dev);
54static int mlxd_detach(device_t dev);
55
56static	d_open_t	mlxd_open;
57static	d_close_t	mlxd_close;
58static	d_strategy_t	mlxd_strategy;
59static	d_ioctl_t	mlxd_ioctl;
60
61#define MLXD_CDEV_MAJOR	131
62
63static struct cdevsw mlxd_cdevsw = {
64		/* open */	mlxd_open,
65		/* close */	mlxd_close,
66		/* read */	physread,
67		/* write */	physwrite,
68		/* ioctl */	mlxd_ioctl,
69		/* poll */	nopoll,
70		/* mmap */	nommap,
71		/* strategy */	mlxd_strategy,
72		/* name */ 	"mlxd",
73		/* maj */	MLXD_CDEV_MAJOR,
74		/* dump */	nodump,
75		/* psize */ 	nopsize,
76		/* flags */	D_DISK,
77};
78
79devclass_t		mlxd_devclass;
80static struct cdevsw	mlxddisk_cdevsw;
81
82static device_method_t mlxd_methods[] = {
83    DEVMETHOD(device_probe,	mlxd_probe),
84    DEVMETHOD(device_attach,	mlxd_attach),
85    DEVMETHOD(device_detach,	mlxd_detach),
86    { 0, 0 }
87};
88
89static driver_t mlxd_driver = {
90    "mlxd",
91    mlxd_methods,
92    sizeof(struct mlxd_softc)
93};
94
95DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0);
96
97static int
98mlxd_open(dev_t dev, int flags, int fmt, struct thread *td)
99{
100    struct mlxd_softc	*sc = (struct mlxd_softc *)dev->si_drv1;
101
102    debug_called(1);
103
104    if (sc == NULL)
105	return (ENXIO);
106
107    /* controller not active? */
108    if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN)
109	return(ENXIO);
110
111    sc->mlxd_disk.d_sectorsize = MLX_BLKSIZE;
112    sc->mlxd_disk.d_mediasize = MLX_BLKSIZE * (off_t)sc->mlxd_drive->ms_size;
113    sc->mlxd_disk.d_fwsectors = sc->mlxd_drive->ms_sectors;
114    sc->mlxd_disk.d_fwheads = sc->mlxd_drive->ms_heads;
115
116    sc->mlxd_flags |= MLXD_OPEN;
117    return (0);
118}
119
120static int
121mlxd_close(dev_t dev, int flags, int fmt, struct thread *td)
122{
123    struct mlxd_softc	*sc = (struct mlxd_softc *)dev->si_drv1;
124
125    debug_called(1);
126
127    if (sc == NULL)
128	return (ENXIO);
129    sc->mlxd_flags &= ~MLXD_OPEN;
130    return (0);
131}
132
133static int
134mlxd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct thread *td)
135{
136    struct mlxd_softc	*sc = (struct mlxd_softc *)dev->si_drv1;
137    int error;
138
139    debug_called(1);
140
141    if (sc == NULL)
142	return (ENXIO);
143
144    if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, td)) != ENOIOCTL) {
145	debug(0, "mlx_submit_ioctl returned %d\n", error);
146	return(error);
147    }
148    return (ENOTTY);
149}
150
151/*
152 * Read/write routine for a buffer.  Finds the proper unit, range checks
153 * arguments, and schedules the transfer.  Does not wait for the transfer
154 * to complete.  Multi-page transfers are supported.  All I/O requests must
155 * be a multiple of a sector in length.
156 */
157static void
158mlxd_strategy(mlx_bio *bp)
159{
160    struct mlxd_softc	*sc = (struct mlxd_softc *)MLX_BIO_SOFTC(bp);
161
162    debug_called(1);
163
164    /* bogus disk? */
165    if (sc == NULL) {
166	MLX_BIO_SET_ERROR(bp, EINVAL);
167	goto bad;
168    }
169
170    /* XXX may only be temporarily offline - sleep? */
171    if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) {
172	MLX_BIO_SET_ERROR(bp, ENXIO);
173	goto bad;
174    }
175
176    MLX_BIO_STATS_START(bp);
177    mlx_submit_buf(sc->mlxd_controller, bp);
178    return;
179
180 bad:
181    /*
182     * Correctly set the bio to indicate a failed tranfer.
183     */
184    MLX_BIO_RESID(bp) = MLX_BIO_LENGTH(bp);
185    MLX_BIO_DONE(bp);
186    return;
187}
188
189void
190mlxd_intr(void *data)
191{
192    mlx_bio 		*bp = (mlx_bio *)data;
193
194    debug_called(1);
195
196    if (MLX_BIO_HAS_ERROR(bp))
197	MLX_BIO_SET_ERROR(bp, EIO);
198    else
199	MLX_BIO_RESID(bp) = 0;
200
201    MLX_BIO_STATS_END(bp);
202    MLX_BIO_DONE(bp);
203}
204
205static int
206mlxd_probe(device_t dev)
207{
208
209    debug_called(1);
210
211    device_set_desc(dev, "Mylex System Drive");
212    return (0);
213}
214
215static int
216mlxd_attach(device_t dev)
217{
218    struct mlxd_softc	*sc = (struct mlxd_softc *)device_get_softc(dev);
219    device_t		parent;
220    char		*state;
221    dev_t		dsk;
222    int			s1, s2;
223
224    debug_called(1);
225
226    parent = device_get_parent(dev);
227    sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent);
228    sc->mlxd_unit = device_get_unit(dev);
229    sc->mlxd_drive = device_get_ivars(dev);
230    sc->mlxd_dev = dev;
231
232    switch(sc->mlxd_drive->ms_state) {
233    case MLX_SYSD_ONLINE:
234	state = "online";
235	break;
236    case MLX_SYSD_CRITICAL:
237	state = "critical";
238	break;
239    case MLX_SYSD_OFFLINE:
240	state = "offline";
241	break;
242    default:
243	state = "unknown state";
244    }
245
246    device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n",
247		  sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE),
248		  sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state);
249
250    devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE,
251		      DEVSTAT_NO_ORDERED_TAGS,
252		      DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
253		      DEVSTAT_PRIORITY_ARRAY);
254
255    dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw);
256    dsk->si_drv1 = sc;
257    sc->mlxd_dev_t = dsk;
258
259    /*
260     * Set maximum I/O size to the lesser of the recommended maximum and the practical
261     * maximum.
262     */
263    s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE;
264    s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE;
265    dsk->si_iosize_max = imin(s1, s2);
266
267    return (0);
268}
269
270static int
271mlxd_detach(device_t dev)
272{
273    struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
274
275    debug_called(1);
276
277    devstat_remove_entry(&sc->mlxd_stats);
278    disk_destroy(&sc->mlxd_disk);
279
280    return(0);
281}
282
283