FreeBSD/Linux Kernel Cross Reference
sys/dev/ida/ida_disk.c
1 /*-
2 * Copyright (c) 1999,2000 Jonathan Lemon
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/8.3/sys/dev/ida/ida_disk.c 146734 2005-05-29 04:42:30Z nyan $
27 */
28
29 /*
30 * Disk driver for Compaq SMART RAID adapters.
31 */
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37
38 #include <sys/bio.h>
39 #include <sys/bus.h>
40 #include <sys/conf.h>
41 #include <sys/cons.h>
42
43 #include <machine/bus.h>
44 #include <sys/rman.h>
45
46 #include <vm/vm.h>
47 #include <vm/pmap.h>
48 #include <machine/md_var.h>
49
50 #include <geom/geom_disk.h>
51
52 #include <dev/ida/idareg.h>
53 #include <dev/ida/idavar.h>
54
55 /* prototypes */
56 static int idad_probe(device_t dev);
57 static int idad_attach(device_t dev);
58 static int idad_detach(device_t dev);
59
60 static d_strategy_t idad_strategy;
61 static dumper_t idad_dump;
62
63 static devclass_t idad_devclass;
64
65 static device_method_t idad_methods[] = {
66 DEVMETHOD(device_probe, idad_probe),
67 DEVMETHOD(device_attach, idad_attach),
68 DEVMETHOD(device_detach, idad_detach),
69 { 0, 0 }
70 };
71
72 static driver_t idad_driver = {
73 "idad",
74 idad_methods,
75 sizeof(struct idad_softc)
76 };
77
78 DRIVER_MODULE(idad, ida, idad_driver, idad_devclass, 0, 0);
79
80 /*
81 * Read/write routine for a buffer. Finds the proper unit, range checks
82 * arguments, and schedules the transfer. Does not wait for the transfer
83 * to complete. Multi-page transfers are supported. All I/O requests must
84 * be a multiple of a sector in length.
85 */
86 static void
87 idad_strategy(struct bio *bp)
88 {
89 struct idad_softc *drv;
90 int s;
91
92 drv = bp->bio_disk->d_drv1;
93 if (drv == NULL) {
94 bp->bio_error = EINVAL;
95 goto bad;
96 }
97
98 /*
99 * software write protect check
100 */
101 if (drv->flags & DRV_WRITEPROT && (bp->bio_cmd == BIO_WRITE)) {
102 bp->bio_error = EROFS;
103 goto bad;
104 }
105
106 bp->bio_driver1 = drv;
107 s = splbio();
108 ida_submit_buf(drv->controller, bp);
109 splx(s);
110 return;
111
112 bad:
113 bp->bio_flags |= BIO_ERROR;
114
115 /*
116 * Correctly set the buf to indicate a completed transfer
117 */
118 bp->bio_resid = bp->bio_bcount;
119 biodone(bp);
120 return;
121 }
122
123 static int
124 idad_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
125 {
126
127 struct idad_softc *drv;
128 int error = 0;
129 struct disk *dp;
130
131 dp = arg;
132 drv = dp->d_drv1;
133 if (drv == NULL)
134 return (ENXIO);
135
136 drv->controller->flags &= ~IDA_INTERRUPTS;
137
138 if (length > 0) {
139 error = ida_command(drv->controller, CMD_WRITE, virtual,
140 length, drv->drive, offset / DEV_BSIZE, DMA_DATA_OUT);
141 }
142 drv->controller->flags |= IDA_INTERRUPTS;
143 return (error);
144 }
145
146 void
147 idad_intr(struct bio *bp)
148 {
149 struct idad_softc *drv;
150
151 drv = bp->bio_disk->d_drv1;
152
153 if (bp->bio_flags & BIO_ERROR)
154 bp->bio_error = EIO;
155 else
156 bp->bio_resid = 0;
157
158 biodone(bp);
159 }
160
161 static int
162 idad_probe(device_t dev)
163 {
164
165 device_set_desc(dev, "Compaq Logical Drive");
166 return (0);
167 }
168
169 static int
170 idad_attach(device_t dev)
171 {
172 struct ida_drive_info dinfo;
173 struct idad_softc *drv;
174 device_t parent;
175 int error;
176
177 drv = (struct idad_softc *)device_get_softc(dev);
178 parent = device_get_parent(dev);
179 drv->dev = dev;
180 drv->controller = (struct ida_softc *)device_get_softc(parent);
181 drv->unit = device_get_unit(dev);
182 drv->drive = drv->controller->num_drives;
183 drv->controller->num_drives++;
184
185 error = ida_command(drv->controller, CMD_GET_LOG_DRV_INFO,
186 &dinfo, sizeof(dinfo), drv->drive, 0, DMA_DATA_IN);
187 if (error) {
188 device_printf(dev, "CMD_GET_LOG_DRV_INFO failed\n");
189 return (ENXIO);
190 }
191
192 drv->cylinders = dinfo.dp.ncylinders;
193 drv->heads = dinfo.dp.nheads;
194 drv->sectors = dinfo.dp.nsectors;
195 drv->secsize = dinfo.secsize == 0 ? 512 : dinfo.secsize;
196 drv->secperunit = dinfo.secperunit;
197
198 /* XXX
199 * other initialization
200 */
201 device_printf(dev, "%uMB (%u sectors), blocksize=%d\n",
202 drv->secperunit / ((1024 * 1024) / drv->secsize),
203 drv->secperunit, drv->secsize);
204
205 drv->disk = disk_alloc();
206 drv->disk->d_strategy = idad_strategy;
207 drv->disk->d_name = "idad";
208 drv->disk->d_dump = idad_dump;
209 drv->disk->d_sectorsize = drv->secsize;
210 drv->disk->d_mediasize = (off_t)drv->secperunit * drv->secsize;
211 drv->disk->d_fwsectors = drv->sectors;
212 drv->disk->d_fwheads = drv->heads;
213 drv->disk->d_drv1 = drv;
214 drv->disk->d_maxsize = DFLTPHYS; /* XXX guess? */
215 drv->disk->d_unit = drv->unit;
216 drv->disk->d_flags = DISKFLAG_NEEDSGIANT;
217 disk_create(drv->disk, DISK_VERSION);
218
219 return (0);
220 }
221
222 static int
223 idad_detach(device_t dev)
224 {
225 struct idad_softc *drv;
226
227 drv = (struct idad_softc *)device_get_softc(dev);
228 disk_destroy(drv->disk);
229 return (0);
230 }
Cache object: 59c1e333c4d31c466b3d7a41ec82d2cb
|