mlx_disk.c revision 119418 
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 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: head/sys/dev/mlx/mlx_disk.c 119418 2003-08-24 17:55:58Z obrien $");
31
32/*
33 * Disk driver for Mylex DAC960 RAID adapters.
34 */
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/kernel.h>
39
40#include <sys/bus.h>
41#include <sys/conf.h>
42
43#include <machine/bus.h>
44#include <sys/rman.h>
45
46#include <geom/geom_disk.h>
47
48#include <dev/mlx/mlx_compat.h>
49#include <dev/mlx/mlxio.h>
50#include <dev/mlx/mlxvar.h>
51#include <dev/mlx/mlxreg.h>
52
53/* prototypes */
54static int mlxd_probe(device_t dev);
55static int mlxd_attach(device_t dev);
56static int mlxd_detach(device_t dev);
57
58devclass_t		mlxd_devclass;
59
60static device_method_t mlxd_methods[] = {
61    DEVMETHOD(device_probe,	mlxd_probe),
62    DEVMETHOD(device_attach,	mlxd_attach),
63    DEVMETHOD(device_detach,	mlxd_detach),
64    { 0, 0 }
65};
66
67static driver_t mlxd_driver = {
68    "mlxd",
69    mlxd_methods,
70    sizeof(struct mlxd_softc)
71};
72
73DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0);
74
75static int
76mlxd_open(struct disk *dp)
77{
78    struct mlxd_softc	*sc = (struct mlxd_softc *)dp->d_drv1;
79
80    debug_called(1);
81
82    if (sc == NULL)
83	return (ENXIO);
84
85    /* controller not active? */
86    if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN)
87	return(ENXIO);
88
89    sc->mlxd_flags |= MLXD_OPEN;
90    return (0);
91}
92
93static int
94mlxd_close(struct disk *dp)
95{
96    struct mlxd_softc	*sc = (struct mlxd_softc *)dp->d_drv1;
97
98    debug_called(1);
99
100    if (sc == NULL)
101	return (ENXIO);
102    sc->mlxd_flags &= ~MLXD_OPEN;
103    return (0);
104}
105
106static int
107mlxd_ioctl(struct disk *dp, u_long cmd, void *addr, int flag, struct thread *td)
108{
109    struct mlxd_softc	*sc = (struct mlxd_softc *)dp->d_drv1;
110    int error;
111
112    debug_called(1);
113
114    if (sc == NULL)
115	return (ENXIO);
116
117    if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, td)) != ENOIOCTL) {
118	debug(0, "mlx_submit_ioctl returned %d\n", error);
119	return(error);
120    }
121    return (ENOTTY);
122}
123
124/*
125 * Read/write routine for a buffer.  Finds the proper unit, range checks
126 * arguments, and schedules the transfer.  Does not wait for the transfer
127 * to complete.  Multi-page transfers are supported.  All I/O requests must
128 * be a multiple of a sector in length.
129 */
130static void
131mlxd_strategy(mlx_bio *bp)
132{
133    struct mlxd_softc	*sc = (struct mlxd_softc *)MLX_BIO_SOFTC(bp);
134
135    debug_called(1);
136
137    /* bogus disk? */
138    if (sc == NULL) {
139	MLX_BIO_SET_ERROR(bp, EINVAL);
140	goto bad;
141    }
142
143    /* XXX may only be temporarily offline - sleep? */
144    if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) {
145	MLX_BIO_SET_ERROR(bp, ENXIO);
146	goto bad;
147    }
148
149    MLX_BIO_STATS_START(bp);
150    mlx_submit_buf(sc->mlxd_controller, bp);
151    return;
152
153 bad:
154    /*
155     * Correctly set the bio to indicate a failed tranfer.
156     */
157    MLX_BIO_RESID(bp) = MLX_BIO_LENGTH(bp);
158    MLX_BIO_DONE(bp);
159    return;
160}
161
162void
163mlxd_intr(void *data)
164{
165    mlx_bio 		*bp = (mlx_bio *)data;
166
167    debug_called(1);
168
169    if (MLX_BIO_HAS_ERROR(bp))
170	MLX_BIO_SET_ERROR(bp, EIO);
171    else
172	MLX_BIO_RESID(bp) = 0;
173
174    MLX_BIO_STATS_END(bp);
175    MLX_BIO_DONE(bp);
176}
177
178static int
179mlxd_probe(device_t dev)
180{
181
182    debug_called(1);
183
184    device_set_desc(dev, "Mylex System Drive");
185    return (0);
186}
187
188static int
189mlxd_attach(device_t dev)
190{
191    struct mlxd_softc	*sc = (struct mlxd_softc *)device_get_softc(dev);
192    device_t		parent;
193    char		*state;
194    int			s1, s2;
195
196    debug_called(1);
197
198    parent = device_get_parent(dev);
199    sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent);
200    sc->mlxd_unit = device_get_unit(dev);
201    sc->mlxd_drive = device_get_ivars(dev);
202    sc->mlxd_dev = dev;
203
204    switch(sc->mlxd_drive->ms_state) {
205    case MLX_SYSD_ONLINE:
206	state = "online";
207	break;
208    case MLX_SYSD_CRITICAL:
209	state = "critical";
210	break;
211    case MLX_SYSD_OFFLINE:
212	state = "offline";
213	break;
214    default:
215	state = "unknown state";
216    }
217
218    device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n",
219		  sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE),
220		  sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state);
221
222    sc->mlxd_disk.d_open = mlxd_open;
223    sc->mlxd_disk.d_close = mlxd_close;
224    sc->mlxd_disk.d_ioctl = mlxd_ioctl;
225    sc->mlxd_disk.d_strategy = mlxd_strategy;
226    sc->mlxd_disk.d_name = "mlxd";
227    sc->mlxd_disk.d_drv1 = sc;
228    sc->mlxd_disk.d_sectorsize = MLX_BLKSIZE;
229    sc->mlxd_disk.d_mediasize = MLX_BLKSIZE * (off_t)sc->mlxd_drive->ms_size;
230    sc->mlxd_disk.d_fwsectors = sc->mlxd_drive->ms_sectors;
231    sc->mlxd_disk.d_fwheads = sc->mlxd_drive->ms_heads;
232
233    /*
234     * Set maximum I/O size to the lesser of the recommended maximum and the practical
235     * maximum except on v2 cards where the maximum is set to 8 pages.
236     */
237    if (sc->mlxd_controller->mlx_iftype == MLX_IFTYPE_2)
238	sc->mlxd_disk.d_maxsize = 8 * PAGE_SIZE;
239    else {
240	s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE;
241	s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE;
242	sc->mlxd_disk.d_maxsize = imin(s1, s2);
243    }
244
245    disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, NULL, NULL);
246
247    return (0);
248}
249
250static int
251mlxd_detach(device_t dev)
252{
253    struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
254
255    debug_called(1);
256
257    disk_destroy(&sc->mlxd_disk);
258
259    return(0);
260}
261
262