2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2001 Scott Long
4 * Copyright (c) 2000 BSDi
5 * Copyright (c) 2001 Adaptec, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $FreeBSD: src/sys/dev/aac/aac_disk.c,v 1.3.2.8 2003/01/11 18:39:39 scottl Exp $
30 * $DragonFly: src/sys/dev/raid/aac/aac_disk.c,v 1.9 2004/06/02 19:31:02 dillon Exp $
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/sysctl.h>
40 #include "aac_compat.h"
43 #include <sys/devicestat.h>
49 #include <machine/md_var.h>
50 #include <machine/bus.h>
54 #include "aac_ioctl.h"
58 * Interface to parent.
60 static int aac_disk_probe(device_t dev);
61 static int aac_disk_attach(device_t dev);
62 static int aac_disk_detach(device_t dev);
65 * Interface to the device switch.
67 static d_open_t aac_disk_open;
68 static d_close_t aac_disk_close;
69 static d_strategy_t aac_disk_strategy;
70 static d_dump_t aac_disk_dump;
72 #define AAC_DISK_CDEV_MAJOR 151
74 static struct cdevsw aac_disk_cdevsw = {
76 /* maj */ AAC_DISK_CDEV_MAJOR,
81 /* open */ aac_disk_open,
82 /* close */ aac_disk_close,
84 /* write */ physwrite,
88 /* strategy */ aac_disk_strategy,
89 /* dump */ aac_disk_dump,
93 devclass_t aac_disk_devclass;
95 static device_method_t aac_disk_methods[] = {
96 DEVMETHOD(device_probe, aac_disk_probe),
97 DEVMETHOD(device_attach, aac_disk_attach),
98 DEVMETHOD(device_detach, aac_disk_detach),
102 static driver_t aac_disk_driver = {
105 sizeof(struct aac_disk)
108 #define AAC_MAXIO 65536
110 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0);
112 /* sysctl tunables */
113 static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */
114 TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max);
116 SYSCTL_DECL(_hw_aac);
117 SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RD, &aac_iosize_max, 0,
118 "Max I/O size per transfer to an array");
121 * Handle open from generic layer.
123 * This is called by the diskslice code on first open in order to get the
124 * basic device geometry paramters.
127 aac_disk_open(dev_t dev, int flags, int fmt, d_thread_t *td)
130 struct disklabel *label;
134 sc = (struct aac_disk *)dev->si_drv1;
137 printf("aac_disk_open: No Softc\n");
141 /* check that the controller is up and running */
142 if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) {
143 printf("Controller Suspended controller state = 0x%x\n",
144 sc->ad_controller->aac_state);
148 /* build synthetic label */
149 label = &sc->ad_disk.d_label;
150 bzero(label, sizeof(*label));
151 label->d_type = DTYPE_ESDI;
152 label->d_secsize = AAC_BLOCK_SIZE;
153 label->d_nsectors = sc->ad_sectors;
154 label->d_ntracks = sc->ad_heads;
155 label->d_ncylinders = sc->ad_cylinders;
156 label->d_secpercyl = sc->ad_sectors * sc->ad_heads;
157 label->d_secperunit = sc->ad_size;
159 sc->ad_flags |= AAC_DISK_OPEN;
164 * Handle last close of the disk device.
167 aac_disk_close(dev_t dev, int flags, int fmt, d_thread_t *td)
173 sc = (struct aac_disk *)dev->si_drv1;
178 sc->ad_flags &= ~AAC_DISK_OPEN;
183 * Handle an I/O request.
186 aac_disk_strategy(struct bio *bp)
192 sc = (struct aac_disk *)bp->bio_dev->si_drv1;
196 bp->bio_flags |= BIO_ERROR;
197 bp->bio_error = EINVAL;
202 /* do-nothing operation? */
203 if (bp->bio_bcount == 0) {
204 bp->bio_resid = bp->bio_bcount;
209 /* perform accounting */
210 devstat_start_transaction(&sc->ad_stats);
212 /* pass the bio to the controller - it can work out who we are */
218 * Dump memory out to an array
220 * This queues blocks of memory of size AAC_MAXIO to the controller and waits
221 * for the controller to complete the requests.
224 aac_disk_dump(dev_t dev, u_int count, u_int blkno, u_int secsize)
227 struct aac_softc *sc;
235 dumppages = AAC_MAXIO / PAGE_SIZE;
240 sc= ad->ad_controller;
242 blkcnt = howmany(PAGE_SIZE, secsize);
247 if ((count / blkcnt) < dumppages)
248 dumppages = count / blkcnt;
250 for (i = 0; i < dumppages; ++i) {
251 vm_offset_t a = addr + (i * PAGE_SIZE);
252 if (is_physical_memory(a)) {
253 va = pmap_kenter_temporary(trunc_page(a), i);
255 va = pmap_kenter_temporary(trunc_page(0), i);
261 * Queue the block to the controller. If the queue is full,
262 * EBUSY will be returned.
264 error = aac_dump_enqueue(ad, blkno, va, dumppages);
265 if (error && (error != EBUSY))
269 if (dumpstatus(addr, (off_t)(count * DEV_BSIZE)) < 0)
272 blkno += blkcnt * dumppages;
273 count -= blkcnt * dumppages;
274 addr += PAGE_SIZE * dumppages;
280 * Either the queue was full on the last attemp, or we have no
281 * more data to dump. Let the queue drain out and retry the
282 * block if the queue was full.
284 aac_dump_complete(sc);
294 * Handle completion of an I/O request.
297 aac_biodone(struct bio *bp)
304 sc = (struct aac_disk *)bp->bio_dev->si_drv1;
306 devstat_end_transaction_bio(&sc->ad_stats, bp);
307 if (bp->bio_flags & BIO_ERROR) {
308 blkno = (sc->ad_label.d_nsectors) ? 0 : -1;
309 #if defined(__FreeBSD__) && __FreeBSD_version > 500005
310 diskerr(bp, bp->b_dev,
311 (char *)bp->bio_driver1, blkno, &sc->ad_label);
313 diskerr(bp, bp->b_dev,
314 (char *)bp->bio_driver1, 0, blkno, &sc->ad_label);
324 aac_disk_probe(device_t dev)
333 * Attach a unit to the controller.
336 aac_disk_attach(device_t dev)
342 sc = (struct aac_disk *)device_get_softc(dev);
344 /* initialise our softc */
346 (struct aac_softc *)device_get_softc(device_get_parent(dev));
347 sc->ad_container = device_get_ivars(dev);
351 * require that extended translation be enabled - other drivers read the
354 sc->ad_size = sc->ad_container->co_mntobj.Capacity;
355 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */
358 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */
365 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors));
367 device_printf(dev, "%uMB (%u sectors)\n",
368 sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE),
371 devstat_add_entry(&sc->ad_stats, "aacd", device_get_unit(dev),
372 AAC_BLOCK_SIZE, DEVSTAT_NO_ORDERED_TAGS,
373 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
374 DEVSTAT_PRIORITY_ARRAY);
376 /* attach a generic disk device to ourselves */
377 sc->ad_dev_t = disk_create(device_get_unit(dev), &sc->ad_disk, 0,
379 sc->ad_dev_t->si_drv1 = sc;
381 sc->ad_dev_t->si_iosize_max = aac_iosize_max;
382 sc->unit = device_get_unit(dev);
388 * Disconnect ourselves from the system.
391 aac_disk_detach(device_t dev)
397 sc = (struct aac_disk *)device_get_softc(dev);
399 if (sc->ad_flags & AAC_DISK_OPEN)
402 devstat_remove_entry(&sc->ad_stats);
403 disk_destroy(&sc->ad_disk);