Change the kernel dev_t, representing a pointer to a specinfo structure,
[dragonfly.git] / sys / dev / raid / mlx / mlx_disk.c
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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: src/sys/dev/mlx/mlx_disk.c,v 1.8.2.4 2001/06/25 04:37:51 msmith Exp $
b13267a5 28 * $DragonFly: src/sys/dev/raid/mlx/mlx_disk.c,v 1.10 2006/09/10 01:26:36 dillon Exp $
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29 */
30
31/*
32 * Disk driver for Mylex DAC960 RAID adapters.
33 */
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38
39#include <sys/bus.h>
40#include <sys/conf.h>
41#include <sys/devicestat.h>
42#include <sys/disk.h>
43
44#include <machine/bus.h>
45#include <sys/rman.h>
46
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47#include "mlx_compat.h"
48#include "mlxio.h"
49#include "mlxvar.h"
50#include "mlxreg.h"
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51
52/* prototypes */
53static int mlxd_probe(device_t dev);
54static int mlxd_attach(device_t dev);
55static int mlxd_detach(device_t dev);
56
57static d_open_t mlxd_open;
58static d_close_t mlxd_close;
59static d_strategy_t mlxd_strategy;
60static d_ioctl_t mlxd_ioctl;
61
62#define MLXD_CDEV_MAJOR 131
63
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64static struct dev_ops mlxd_ops = {
65 { "mlxd", MLXD_CDEV_MAJOR, D_DISK },
66 .d_open = mlxd_open,
67 .d_close = mlxd_close,
68 .d_read = physread,
69 .d_write = physwrite,
70 .d_ioctl = mlxd_ioctl,
71 .d_strategy = mlxd_strategy,
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72};
73
74devclass_t mlxd_devclass;
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75
76static device_method_t mlxd_methods[] = {
77 DEVMETHOD(device_probe, mlxd_probe),
78 DEVMETHOD(device_attach, mlxd_attach),
79 DEVMETHOD(device_detach, mlxd_detach),
80 { 0, 0 }
81};
82
83static driver_t mlxd_driver = {
84 "mlxd",
85 mlxd_methods,
86 sizeof(struct mlxd_softc)
87};
88
89DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0);
90
91static int
fef8985e 92mlxd_open(struct dev_open_args *ap)
984263bc 93{
b13267a5 94 cdev_t dev = ap->a_head.a_dev;
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95 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1;
96 struct disklabel *label;
97
98 debug_called(1);
99
100 if (sc == NULL)
101 return (ENXIO);
102
103 /* controller not active? */
104 if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN)
105 return(ENXIO);
106
107 label = &sc->mlxd_disk.d_label;
108 bzero(label, sizeof(*label));
109 label->d_type = DTYPE_SCSI;
110 label->d_secsize = MLX_BLKSIZE;
111 label->d_nsectors = sc->mlxd_drive->ms_sectors;
112 label->d_ntracks = sc->mlxd_drive->ms_heads;
113 label->d_ncylinders = sc->mlxd_drive->ms_cylinders;
114 label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads;
115 label->d_secperunit = sc->mlxd_drive->ms_size;
116
117 sc->mlxd_flags |= MLXD_OPEN;
118 return (0);
119}
120
121static int
fef8985e 122mlxd_close(struct dev_close_args *ap)
984263bc 123{
b13267a5 124 cdev_t dev = ap->a_head.a_dev;
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125 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1;
126
127 debug_called(1);
128
129 if (sc == NULL)
130 return (ENXIO);
131 sc->mlxd_flags &= ~MLXD_OPEN;
132 return (0);
133}
134
135static int
fef8985e 136mlxd_ioctl(struct dev_ioctl_args *ap)
984263bc 137{
b13267a5 138 cdev_t dev = ap->a_head.a_dev;
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139 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1;
140 int error;
141
142 debug_called(1);
143
144 if (sc == NULL)
145 return (ENXIO);
146
fef8985e 147 if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, ap->a_cmd, ap->a_data, ap->a_fflag)) != ENOIOCTL) {
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148 debug(0, "mlx_submit_ioctl returned %d\n", error);
149 return(error);
150 }
151 return (ENOTTY);
152}
153
154/*
155 * Read/write routine for a buffer. Finds the proper unit, range checks
156 * arguments, and schedules the transfer. Does not wait for the transfer
157 * to complete. Multi-page transfers are supported. All I/O requests must
158 * be a multiple of a sector in length.
159 */
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160static int
161mlxd_strategy(struct dev_strategy_args *ap)
984263bc 162{
fef8985e 163 struct bio *bio = ap->a_bio;
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164 struct buf *bp = bio->bio_buf;
165 struct mlxd_softc *sc = (struct mlxd_softc *)bio->bio_driver_info;
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166
167 debug_called(1);
168
169 /* bogus disk? */
170 if (sc == NULL) {
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171 bp->b_error = EINVAL;
172 bp->b_flags |= B_ERROR;
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173 goto bad;
174 }
175
176 /* XXX may only be temporarily offline - sleep? */
177 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) {
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178 bp->b_error = ENXIO;
179 bp->b_flags |= B_ERROR;
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180 goto bad;
181 }
182
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183 devstat_start_transaction(&sc->mlxd_stats);
184 mlx_submit_bio(sc->mlxd_controller, bio);
fef8985e 185 return(0);
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186
187 bad:
188 /*
189 * Correctly set the bio to indicate a failed tranfer.
190 */
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191 bp->b_resid = bp->b_bcount;
192 biodone(bio);
fef8985e 193 return(0);
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194}
195
196void
81b5c339 197mlxd_intr(struct bio *bio)
984263bc 198{
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199 struct buf *bp = bio->bio_buf;
200 struct mlxd_softc *sc = (struct mlxd_softc *)bio->bio_driver_info;
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201
202 debug_called(1);
984263bc 203
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204 if (bp->b_flags & B_ERROR)
205 bp->b_error = EIO;
206 else
207 bp->b_resid = 0;
208 devstat_end_transaction_buf(&sc->mlxd_stats, bp);
209 biodone(bio);
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210}
211
212static int
213mlxd_probe(device_t dev)
214{
215
216 debug_called(1);
217
218 device_set_desc(dev, "Mylex System Drive");
219 return (0);
220}
221
222static int
223mlxd_attach(device_t dev)
224{
225 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
226 device_t parent;
227 char *state;
b13267a5 228 cdev_t dsk;
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229 int s1, s2;
230
231 debug_called(1);
232
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);
237 sc->mlxd_dev = dev;
238
239 switch(sc->mlxd_drive->ms_state) {
240 case MLX_SYSD_ONLINE:
241 state = "online";
242 break;
243 case MLX_SYSD_CRITICAL:
244 state = "critical";
245 break;
246 case MLX_SYSD_OFFLINE:
247 state = "offline";
248 break;
249 default:
250 state = "unknown state";
251 }
252
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);
256
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);
261
fef8985e 262 dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_ops);
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263 dsk->si_drv1 = sc;
264 sc->mlxd_dev_t = dsk;
265
266 /*
267 * Set maximum I/O size to the lesser of the recommended maximum and the practical
268 * maximum.
269 */
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);
273
274 return (0);
275}
276
277static int
278mlxd_detach(device_t dev)
279{
280 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
281
282 debug_called(1);
283
284 devstat_remove_entry(&sc->mlxd_stats);
335dda38 285 disk_destroy(&sc->mlxd_disk);
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286
287 return(0);
288}
289