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 */
56static int idad_probe(device_t dev);
57static int idad_attach(device_t dev);
58static int idad_detach(device_t dev);
59
60static	d_strategy_t	idad_strategy;
61static	dumper_t	idad_dump;
62
63static devclass_t	idad_devclass;
64
65static 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
72static driver_t idad_driver = {
73	"idad",
74	idad_methods,
75	sizeof(struct idad_softc)
76};
77
78DRIVER_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 */
86static void
87idad_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
112bad:
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
123static int
124idad_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
146void
147idad_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
161static int
162idad_probe(device_t dev)
163{
164
165	device_set_desc(dev, "Compaq Logical Drive");
166	return (0);
167}
168
169static int
170idad_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
222static int
223idad_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