xref: /freebsd/sys/dev/ida/ida_disk.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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  * $FreeBSD$
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 }
231