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 1.20 2008/01/20 03:40:35 pavalos Exp $
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/module.h>
39 #include <sys/sysctl.h>
43 #include <sys/devicestat.h>
45 #include <sys/dtype.h>
51 #include <machine/md_var.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 dev_ops aac_disk_ops = {
75 { "aacd", AAC_DISK_CDEV_MAJOR, D_DISK },
76 .d_open = aac_disk_open,
77 .d_close = aac_disk_close,
80 .d_strategy = aac_disk_strategy,
81 .d_dump = aac_disk_dump,
84 static devclass_t aac_disk_devclass;
86 static device_method_t aac_disk_methods[] = {
87 DEVMETHOD(device_probe, aac_disk_probe),
88 DEVMETHOD(device_attach, aac_disk_attach),
89 DEVMETHOD(device_detach, aac_disk_detach),
93 static driver_t aac_disk_driver = {
96 sizeof(struct aac_disk)
99 #define AAC_MAXIO 65536
101 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0);
103 /* sysctl tunables */
104 static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */
105 TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max);
107 SYSCTL_DECL(_hw_aac);
108 SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RD, &aac_iosize_max, 0,
109 "Max I/O size per transfer to an array");
112 * Handle open from generic layer.
114 * This is called by the diskslice code on first open in order to get the
115 * basic device geometry paramters.
118 aac_disk_open(struct dev_open_args *ap)
120 cdev_t dev = ap->a_head.a_dev;
125 sc = (struct aac_disk *)dev->si_drv1;
128 kprintf("aac_disk_open: No Softc\n");
132 /* check that the controller is up and running */
133 if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) {
134 kprintf("Controller Suspended controller state = 0x%x\n",
135 sc->ad_controller->aac_state);
139 /* build synthetic label */
141 bzero(&info, sizeof(info));
142 info.d_media_blksize= AAC_BLOCK_SIZE; /* mandatory */
143 info.d_media_blocks = sc->ad_size;
145 info.d_type = DTYPE_ESDI; /* optional */
146 info.d_secpertrack = sc->ad_sectors;
147 info.d_nheads = sc->ad_heads;
148 info.d_ncylinders = sc->ad_cylinders;
149 info.d_secpercyl = sc->ad_sectors * sc->ad_heads;
151 disk_setdiskinfo(&sc->ad_disk, &info);
153 sc->ad_flags |= AAC_DISK_OPEN;
158 * Handle last close of the disk device.
161 aac_disk_close(struct dev_close_args *ap)
163 cdev_t dev = ap->a_head.a_dev;
168 sc = (struct aac_disk *)dev->si_drv1;
173 sc->ad_flags &= ~AAC_DISK_OPEN;
178 * Handle an I/O request.
181 aac_disk_strategy(struct dev_strategy_args *ap)
183 cdev_t dev = ap->a_head.a_dev;
184 struct bio *bio = ap->a_bio;
185 struct buf *bp = bio->bio_buf;
190 sc = (struct aac_disk *)dev->si_drv1;
194 bp->b_flags |= B_ERROR;
195 bp->b_error = EINVAL;
200 /* do-nothing operation? */
201 if (bp->b_bcount == 0) {
202 bp->b_resid = bp->b_bcount;
207 /* perform accounting */
209 /* pass the bio to the controller - it can work out who we are */
210 AAC_LOCK_ACQUIRE(&sc->ad_controller->aac_io_lock);
211 devstat_start_transaction(&sc->ad_stats);
212 aac_submit_bio(sc, bio);
213 AAC_LOCK_RELEASE(&sc->ad_controller->aac_io_lock);
219 * Dump memory out to an array
221 * This queues blocks of memory of size AAC_MAXIO to the controller and waits
222 * for the controller to complete the requests.
225 aac_disk_dump(struct dev_dump_args *ap)
227 kprintf("dumps on aac are currently broken, not dumping\n");
230 cdev_t dev = ap->a_head.a_dev;
232 struct aac_softc *sc;
240 dumppages = AAC_MAXIO / PAGE_SIZE;
245 sc= ad->ad_controller;
247 blkcnt = howmany(PAGE_SIZE, ap->a_secsize);
249 while (ap->a_count > 0) {
252 if ((ap->a_count / blkcnt) < dumppages)
253 dumppages = ap->a_count / blkcnt;
255 for (i = 0; i < dumppages; ++i) {
256 vm_offset_t a = addr + (i * PAGE_SIZE);
257 if (is_physical_memory(a)) {
258 va = pmap_kenter_temporary(trunc_page(a), i);
260 va = pmap_kenter_temporary(trunc_page(0), i);
266 * Queue the block to the controller. If the queue is full,
267 * EBUSY will be returned.
269 error = aac_dump_enqueue(ad, ap->a_blkno, va, dumppages);
270 if (error && (error != EBUSY))
274 if (dumpstatus(addr, (off_t)(ap->a_count * DEV_BSIZE)) < 0)
277 ap->a_blkno += blkcnt * dumppages;
278 ap->a_count -= blkcnt * dumppages;
279 addr += PAGE_SIZE * dumppages;
285 * Either the queue was full on the last attemp, or we have no
286 * more data to dump. Let the queue drain out and retry the
287 * block if the queue was full.
289 aac_dump_complete(sc);
300 * Handle completion of an I/O request.
303 aac_biodone(struct bio *bio, const char *code)
305 struct buf *bp = bio->bio_buf;
310 sc = (struct aac_disk *)bio->bio_driver_info;
312 devstat_end_transaction_buf(&sc->ad_stats, bp);
313 if (bp->b_flags & B_ERROR) {
314 diskerr(bio, sc->ad_dev_t,
324 aac_disk_probe(device_t dev)
333 * Attach a unit to the controller.
336 aac_disk_attach(device_t dev)
338 struct disk_info info;
343 sc = (struct aac_disk *)device_get_softc(dev);
345 /* initialise our softc */
347 (struct aac_softc *)device_get_softc(device_get_parent(dev));
348 sc->ad_container = device_get_ivars(dev);
352 * require that extended translation be enabled - other drivers read the
355 sc->ad_size = sc->ad_container->co_mntobj.Capacity;
356 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */
359 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */
366 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors));
368 device_printf(dev, "%uMB (%u sectors)\n",
369 sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE),
372 devstat_add_entry(&sc->ad_stats, "aacd", device_get_unit(dev),
373 AAC_BLOCK_SIZE, DEVSTAT_NO_ORDERED_TAGS,
374 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
375 DEVSTAT_PRIORITY_ARRAY);
377 /* attach a generic disk device to ourselves */
378 sc->ad_dev_t = disk_create(device_get_unit(dev), &sc->ad_disk,
380 sc->ad_dev_t->si_drv1 = sc;
382 sc->ad_dev_t->si_iosize_max = aac_iosize_max;
383 sc->unit = device_get_unit(dev);
386 * Set disk info, as it appears that all needed data is available already.
387 * Setting the disk info will also cause the probing to start.
389 bzero(&info, sizeof(info));
390 info.d_media_blksize= AAC_BLOCK_SIZE; /* mandatory */
391 info.d_media_blocks = sc->ad_size;
393 info.d_type = DTYPE_ESDI; /* optional */
394 info.d_secpertrack = sc->ad_sectors;
395 info.d_nheads = sc->ad_heads;
396 info.d_ncylinders = sc->ad_cylinders;
397 info.d_secpercyl = sc->ad_sectors * sc->ad_heads;
399 disk_setdiskinfo(&sc->ad_disk, &info);
405 * Disconnect ourselves from the system.
408 aac_disk_detach(device_t dev)
414 sc = (struct aac_disk *)device_get_softc(dev);
416 if (sc->ad_flags & AAC_DISK_OPEN)
419 devstat_remove_entry(&sc->ad_stats);
420 disk_destroy(&sc->ad_disk);