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: stable/10/sys/dev/mlx/mlx_disk.c 240963 2012-09-26 14:17:14Z jhb $");
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/bio.h>
39 #include <sys/kernel.h>
40 #include <sys/lock.h>
41 #include <sys/module.h>
42 #include <sys/sx.h>
43
44 #include <sys/bus.h>
45 #include <sys/conf.h>
46
47 #include <machine/bus.h>
48 #include <sys/rman.h>
49
50 #include <geom/geom_disk.h>
51
52 #include <dev/mlx/mlxio.h>
53 #include <dev/mlx/mlxvar.h>
54 #include <dev/mlx/mlxreg.h>
55
56 /* prototypes */
57 static int mlxd_probe(device_t dev);
58 static int mlxd_attach(device_t dev);
59 static int mlxd_detach(device_t dev);
60
61 devclass_t mlxd_devclass;
62
63 static device_method_t mlxd_methods[] = {
64 DEVMETHOD(device_probe, mlxd_probe),
65 DEVMETHOD(device_attach, mlxd_attach),
66 DEVMETHOD(device_detach, mlxd_detach),
67 { 0, 0 }
68 };
69
70 static driver_t mlxd_driver = {
71 "mlxd",
72 mlxd_methods,
73 sizeof(struct mlxd_softc)
74 };
75
76 DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0);
77
78 static int
mlxd_open(struct disk * dp)79 mlxd_open(struct disk *dp)
80 {
81 struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_drv1;
82
83 debug_called(1);
84
85 if (sc == NULL)
86 return (ENXIO);
87
88 /* controller not active? */
89 MLX_CONFIG_LOCK(sc->mlxd_controller);
90 MLX_IO_LOCK(sc->mlxd_controller);
91 if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) {
92 MLX_IO_UNLOCK(sc->mlxd_controller);
93 MLX_CONFIG_UNLOCK(sc->mlxd_controller);
94 return(ENXIO);
95 }
96
97 sc->mlxd_flags |= MLXD_OPEN;
98 MLX_IO_UNLOCK(sc->mlxd_controller);
99 MLX_CONFIG_UNLOCK(sc->mlxd_controller);
100 return (0);
101 }
102
103 static int
mlxd_close(struct disk * dp)104 mlxd_close(struct disk *dp)
105 {
106 struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_drv1;
107
108 debug_called(1);
109
110 if (sc == NULL)
111 return (ENXIO);
112 MLX_CONFIG_LOCK(sc->mlxd_controller);
113 MLX_IO_LOCK(sc->mlxd_controller);
114 sc->mlxd_flags &= ~MLXD_OPEN;
115 MLX_IO_UNLOCK(sc->mlxd_controller);
116 MLX_CONFIG_UNLOCK(sc->mlxd_controller);
117 return (0);
118 }
119
120 static int
mlxd_ioctl(struct disk * dp,u_long cmd,void * addr,int flag,struct thread * td)121 mlxd_ioctl(struct disk *dp, u_long cmd, void *addr, int flag, struct thread *td)
122 {
123 struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_drv1;
124 int error;
125
126 debug_called(1);
127
128 if (sc == NULL)
129 return (ENXIO);
130
131 if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, td)) != ENOIOCTL) {
132 debug(0, "mlx_submit_ioctl returned %d\n", error);
133 return(error);
134 }
135 return (ENOTTY);
136 }
137
138 /*
139 * Read/write routine for a buffer. Finds the proper unit, range checks
140 * arguments, and schedules the transfer. Does not wait for the transfer
141 * to complete. Multi-page transfers are supported. All I/O requests must
142 * be a multiple of a sector in length.
143 */
144 static void
mlxd_strategy(struct bio * bp)145 mlxd_strategy(struct bio *bp)
146 {
147 struct mlxd_softc *sc = bp->bio_disk->d_drv1;
148
149 debug_called(1);
150
151 /* bogus disk? */
152 if (sc == NULL) {
153 bp->bio_error = EINVAL;
154 bp->bio_flags |= BIO_ERROR;
155 goto bad;
156 }
157
158 /* XXX may only be temporarily offline - sleep? */
159 MLX_IO_LOCK(sc->mlxd_controller);
160 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) {
161 MLX_IO_UNLOCK(sc->mlxd_controller);
162 bp->bio_error = ENXIO;
163 bp->bio_flags |= BIO_ERROR;
164 goto bad;
165 }
166
167 mlx_submit_buf(sc->mlxd_controller, bp);
168 MLX_IO_UNLOCK(sc->mlxd_controller);
169 return;
170
171 bad:
172 /*
173 * Correctly set the bio to indicate a failed tranfer.
174 */
175 bp->bio_resid = bp->bio_bcount;
176 biodone(bp);
177 return;
178 }
179
180 void
mlxd_intr(struct bio * bp)181 mlxd_intr(struct bio *bp)
182 {
183
184 debug_called(1);
185
186 if (bp->bio_flags & BIO_ERROR)
187 bp->bio_error = EIO;
188 else
189 bp->bio_resid = 0;
190
191 biodone(bp);
192 }
193
194 static int
mlxd_probe(device_t dev)195 mlxd_probe(device_t dev)
196 {
197
198 debug_called(1);
199
200 device_set_desc(dev, "Mylex System Drive");
201 return (0);
202 }
203
204 static int
mlxd_attach(device_t dev)205 mlxd_attach(device_t dev)
206 {
207 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
208 device_t parent;
209 char *state;
210 int s1, s2;
211
212 debug_called(1);
213
214 parent = device_get_parent(dev);
215 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent);
216 sc->mlxd_unit = device_get_unit(dev);
217 sc->mlxd_drive = device_get_ivars(dev);
218 sc->mlxd_dev = dev;
219
220 switch(sc->mlxd_drive->ms_state) {
221 case MLX_SYSD_ONLINE:
222 state = "online";
223 break;
224 case MLX_SYSD_CRITICAL:
225 state = "critical";
226 break;
227 case MLX_SYSD_OFFLINE:
228 state = "offline";
229 break;
230 default:
231 state = "unknown state";
232 }
233
234 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n",
235 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE),
236 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state);
237
238 sc->mlxd_disk = disk_alloc();
239 sc->mlxd_disk->d_open = mlxd_open;
240 sc->mlxd_disk->d_close = mlxd_close;
241 sc->mlxd_disk->d_ioctl = mlxd_ioctl;
242 sc->mlxd_disk->d_strategy = mlxd_strategy;
243 sc->mlxd_disk->d_name = "mlxd";
244 sc->mlxd_disk->d_unit = sc->mlxd_unit;
245 sc->mlxd_disk->d_drv1 = sc;
246 sc->mlxd_disk->d_sectorsize = MLX_BLKSIZE;
247 sc->mlxd_disk->d_mediasize = MLX_BLKSIZE * (off_t)sc->mlxd_drive->ms_size;
248 sc->mlxd_disk->d_fwsectors = sc->mlxd_drive->ms_sectors;
249 sc->mlxd_disk->d_fwheads = sc->mlxd_drive->ms_heads;
250
251 /*
252 * Set maximum I/O size to the lesser of the recommended maximum and the practical
253 * maximum except on v2 cards where the maximum is set to 8 pages.
254 */
255 if (sc->mlxd_controller->mlx_iftype == MLX_IFTYPE_2)
256 sc->mlxd_disk->d_maxsize = 8 * MLX_PAGE_SIZE;
257 else {
258 s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE;
259 s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * MLX_PAGE_SIZE;
260 sc->mlxd_disk->d_maxsize = imin(s1, s2);
261 }
262
263 disk_create(sc->mlxd_disk, DISK_VERSION);
264
265 return (0);
266 }
267
268 static int
mlxd_detach(device_t dev)269 mlxd_detach(device_t dev)
270 {
271 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev);
272
273 debug_called(1);
274
275 disk_destroy(sc->mlxd_disk);
276
277 return(0);
278 }
279
280