2 * Copyright (c) 1999 Jonathan Lemon
3 * Copyright (c) 1999 Michael Smith
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
27 * $FreeBSD: src/sys/dev/mlx/mlx_disk.c,v 1.8.2.4 2001/06/25 04:37:51 msmith Exp $
28 * $DragonFly: src/sys/dev/raid/mlx/mlx_disk.c,v 1.2 2003/06/17 04:28:28 dillon Exp $
32 * Disk driver for Mylex DAC960 RAID adapters.
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
41 #include <sys/devicestat.h>
44 #include <machine/bus.h>
47 #include <dev/mlx/mlx_compat.h>
48 #include <dev/mlx/mlxio.h>
49 #include <dev/mlx/mlxvar.h>
50 #include <dev/mlx/mlxreg.h>
53 static int mlxd_probe(device_t dev);
54 static int mlxd_attach(device_t dev);
55 static int mlxd_detach(device_t dev);
57 static d_open_t mlxd_open;
58 static d_close_t mlxd_close;
59 static d_strategy_t mlxd_strategy;
60 static d_ioctl_t mlxd_ioctl;
62 #define MLXD_CDEV_MAJOR 131
64 static struct cdevsw mlxd_cdevsw = {
66 /* close */ mlxd_close,
68 /* write */ physwrite,
69 /* ioctl */ mlxd_ioctl,
72 /* strategy */ mlxd_strategy,
74 /* maj */ MLXD_CDEV_MAJOR,
80 devclass_t mlxd_devclass;
81 static struct cdevsw mlxddisk_cdevsw;
83 static device_method_t mlxd_methods[] = {
84 DEVMETHOD(device_probe, mlxd_probe),
85 DEVMETHOD(device_attach, mlxd_attach),
86 DEVMETHOD(device_detach, mlxd_detach),
90 static driver_t mlxd_driver = {
93 sizeof(struct mlxd_softc)
96 DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0);
99 mlxd_open(dev_t dev, int flags, int fmt, struct proc *p)
101 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1;
102 struct disklabel *label;
109 /* controller not active? */
110 if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN)
113 label = &sc->mlxd_disk.d_label;
114 bzero(label, sizeof(*label));
115 label->d_type = DTYPE_SCSI;
116 label->d_secsize = MLX_BLKSIZE;
117 label->d_nsectors = sc->mlxd_drive->ms_sectors;
118 label->d_ntracks = sc->mlxd_drive->ms_heads;
119 label->d_ncylinders = sc->mlxd_drive->ms_cylinders;
120 label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads;
121 label->d_secperunit = sc->mlxd_drive->ms_size;
123 sc->mlxd_flags |= MLXD_OPEN;
128 mlxd_close(dev_t dev, int flags, int fmt, struct proc *p)
130 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1;
136 sc->mlxd_flags &= ~MLXD_OPEN;
141 mlxd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p)
143 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1;
151 if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, p)) != ENOIOCTL) {
152 debug(0, "mlx_submit_ioctl returned %d\n", error);
159 * Read/write routine for a buffer. Finds the proper unit, range checks
160 * arguments, and schedules the transfer. Does not wait for the transfer
161 * to complete. Multi-page transfers are supported. All I/O requests must
162 * be a multiple of a sector in length.
165 mlxd_strategy(mlx_bio *bp)
167 struct mlxd_softc *sc = (struct mlxd_softc *)MLX_BIO_SOFTC(bp);
173 MLX_BIO_SET_ERROR(bp, EINVAL);
177 /* XXX may only be temporarily offline - sleep? */
178 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) {
179 MLX_BIO_SET_ERROR(bp, ENXIO);
183 MLX_BIO_STATS_START(bp);
184 mlx_submit_buf(sc->mlxd_controller, bp);
189 * Correctly set the bio to indicate a failed tranfer.
191 MLX_BIO_RESID(bp) = MLX_BIO_LENGTH(bp);
197 mlxd_intr(void *data)
199 mlx_bio *bp = (mlx_bio *)data;
203 if (MLX_BIO_HAS_ERROR(bp))
204 MLX_BIO_SET_ERROR(bp, EIO);
206 MLX_BIO_RESID(bp) = 0;
208 MLX_BIO_STATS_END(bp);
213 mlxd_probe(device_t dev)
218 device_set_desc(dev, "Mylex System Drive");
223 mlxd_attach(device_t dev)
225 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
233 parent = device_get_parent(dev);
234 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent);
235 sc->mlxd_unit = device_get_unit(dev);
236 sc->mlxd_drive = device_get_ivars(dev);
239 switch(sc->mlxd_drive->ms_state) {
240 case MLX_SYSD_ONLINE:
243 case MLX_SYSD_CRITICAL:
246 case MLX_SYSD_OFFLINE:
250 state = "unknown state";
253 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n",
254 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE),
255 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state);
257 devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE,
258 DEVSTAT_NO_ORDERED_TAGS,
259 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
260 DEVSTAT_PRIORITY_ARRAY);
262 dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw);
264 sc->mlxd_dev_t = dsk;
267 * Set maximum I/O size to the lesser of the recommended maximum and the practical
270 s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE;
271 s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE;
272 dsk->si_iosize_max = imin(s1, s2);
278 mlxd_detach(device_t dev)
280 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
284 devstat_remove_entry(&sc->mlxd_stats);
285 disk_destroy(sc->mlxd_dev_t);