FreeBSD/Linux Kernel Cross Reference
sys/dev/mlx/mlx_disk.c
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("$FreeBSD$");
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 #include <sys/module.h>
40
41 #include <sys/bus.h>
42 #include <sys/conf.h>
43
44 #include <machine/bus.h>
45 #include <sys/rman.h>
46
47 #include <geom/geom_disk.h>
48
49 #include <dev/mlx/mlx_compat.h>
50 #include <dev/mlx/mlxio.h>
51 #include <dev/mlx/mlxvar.h>
52 #include <dev/mlx/mlxreg.h>
53
54 /* prototypes */
55 static int mlxd_probe(device_t dev);
56 static int mlxd_attach(device_t dev);
57 static int mlxd_detach(device_t dev);
58
59 devclass_t mlxd_devclass;
60
61 static device_method_t mlxd_methods[] = {
62 DEVMETHOD(device_probe, mlxd_probe),
63 DEVMETHOD(device_attach, mlxd_attach),
64 DEVMETHOD(device_detach, mlxd_detach),
65 { 0, 0 }
66 };
67
68 static driver_t mlxd_driver = {
69 "mlxd",
70 mlxd_methods,
71 sizeof(struct mlxd_softc)
72 };
73
74 DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0);
75
76 static int
77 mlxd_open(struct disk *dp)
78 {
79 struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_drv1;
80
81 debug_called(1);
82
83 if (sc == NULL)
84 return (ENXIO);
85
86 /* controller not active? */
87 if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN)
88 return(ENXIO);
89
90 sc->mlxd_flags |= MLXD_OPEN;
91 return (0);
92 }
93
94 static int
95 mlxd_close(struct disk *dp)
96 {
97 struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_drv1;
98
99 debug_called(1);
100
101 if (sc == NULL)
102 return (ENXIO);
103 sc->mlxd_flags &= ~MLXD_OPEN;
104 return (0);
105 }
106
107 static int
108 mlxd_ioctl(struct disk *dp, u_long cmd, void *addr, int flag, struct thread *td)
109 {
110 struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_drv1;
111 int error;
112
113 debug_called(1);
114
115 if (sc == NULL)
116 return (ENXIO);
117
118 if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, td)) != ENOIOCTL) {
119 debug(0, "mlx_submit_ioctl returned %d\n", error);
120 return(error);
121 }
122 return (ENOTTY);
123 }
124
125 /*
126 * Read/write routine for a buffer. Finds the proper unit, range checks
127 * arguments, and schedules the transfer. Does not wait for the transfer
128 * to complete. Multi-page transfers are supported. All I/O requests must
129 * be a multiple of a sector in length.
130 */
131 static void
132 mlxd_strategy(mlx_bio *bp)
133 {
134 struct mlxd_softc *sc = (struct mlxd_softc *)MLX_BIO_SOFTC(bp);
135
136 debug_called(1);
137
138 /* bogus disk? */
139 if (sc == NULL) {
140 MLX_BIO_SET_ERROR(bp, EINVAL);
141 goto bad;
142 }
143
144 /* XXX may only be temporarily offline - sleep? */
145 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) {
146 MLX_BIO_SET_ERROR(bp, ENXIO);
147 goto bad;
148 }
149
150 MLX_BIO_STATS_START(bp);
151 mlx_submit_buf(sc->mlxd_controller, bp);
152 return;
153
154 bad:
155 /*
156 * Correctly set the bio to indicate a failed tranfer.
157 */
158 MLX_BIO_RESID(bp) = MLX_BIO_LENGTH(bp);
159 MLX_BIO_DONE(bp);
160 return;
161 }
162
163 void
164 mlxd_intr(void *data)
165 {
166 mlx_bio *bp = (mlx_bio *)data;
167
168 debug_called(1);
169
170 if (MLX_BIO_HAS_ERROR(bp))
171 MLX_BIO_SET_ERROR(bp, EIO);
172 else
173 MLX_BIO_RESID(bp) = 0;
174
175 MLX_BIO_STATS_END(bp);
176 MLX_BIO_DONE(bp);
177 }
178
179 static int
180 mlxd_probe(device_t dev)
181 {
182
183 debug_called(1);
184
185 device_set_desc(dev, "Mylex System Drive");
186 return (0);
187 }
188
189 static int
190 mlxd_attach(device_t dev)
191 {
192 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
193 device_t parent;
194 char *state;
195 int s1, s2;
196
197 debug_called(1);
198
199 parent = device_get_parent(dev);
200 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent);
201 sc->mlxd_unit = device_get_unit(dev);
202 sc->mlxd_drive = device_get_ivars(dev);
203 sc->mlxd_dev = dev;
204
205 switch(sc->mlxd_drive->ms_state) {
206 case MLX_SYSD_ONLINE:
207 state = "online";
208 break;
209 case MLX_SYSD_CRITICAL:
210 state = "critical";
211 break;
212 case MLX_SYSD_OFFLINE:
213 state = "offline";
214 break;
215 default:
216 state = "unknown state";
217 }
218
219 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n",
220 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE),
221 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state);
222
223 sc->mlxd_disk = disk_alloc();
224 sc->mlxd_disk->d_open = mlxd_open;
225 sc->mlxd_disk->d_close = mlxd_close;
226 sc->mlxd_disk->d_ioctl = mlxd_ioctl;
227 sc->mlxd_disk->d_strategy = mlxd_strategy;
228 sc->mlxd_disk->d_name = "mlxd";
229 sc->mlxd_disk->d_unit = sc->mlxd_unit;
230 sc->mlxd_disk->d_drv1 = sc;
231 sc->mlxd_disk->d_sectorsize = MLX_BLKSIZE;
232 sc->mlxd_disk->d_mediasize = MLX_BLKSIZE * (off_t)sc->mlxd_drive->ms_size;
233 sc->mlxd_disk->d_fwsectors = sc->mlxd_drive->ms_sectors;
234 sc->mlxd_disk->d_fwheads = sc->mlxd_drive->ms_heads;
235 sc->mlxd_disk->d_flags = DISKFLAG_NEEDSGIANT;
236
237 /*
238 * Set maximum I/O size to the lesser of the recommended maximum and the practical
239 * maximum except on v2 cards where the maximum is set to 8 pages.
240 */
241 if (sc->mlxd_controller->mlx_iftype == MLX_IFTYPE_2)
242 sc->mlxd_disk->d_maxsize = 8 * PAGE_SIZE;
243 else {
244 s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE;
245 s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE;
246 sc->mlxd_disk->d_maxsize = imin(s1, s2);
247 }
248
249 disk_create(sc->mlxd_disk, DISK_VERSION);
250
251 return (0);
252 }
253
254 static int
255 mlxd_detach(device_t dev)
256 {
257 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
258
259 debug_called(1);
260
261 disk_destroy(sc->mlxd_disk);
262
263 return(0);
264 }
265
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