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 1.16 2006/12/22 23:26:23 swildner 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>
50 #include <machine/md_var.h>
53 #include "aac_ioctl.h"
57 * Interface to parent.
59 static int aac_disk_probe(device_t dev);
60 static int aac_disk_attach(device_t dev);
61 static int aac_disk_detach(device_t dev);
64 * Interface to the device switch.
66 static d_open_t aac_disk_open;
67 static d_close_t aac_disk_close;
68 static d_strategy_t aac_disk_strategy;
69 static d_dump_t aac_disk_dump;
71 #define AAC_DISK_CDEV_MAJOR 151
73 static struct dev_ops aac_disk_ops = {
74 { "aacd", AAC_DISK_CDEV_MAJOR, D_DISK },
75 .d_open = aac_disk_open,
76 .d_close = aac_disk_close,
79 .d_strategy = aac_disk_strategy,
80 .d_dump = aac_disk_dump,
83 devclass_t aac_disk_devclass;
85 static device_method_t aac_disk_methods[] = {
86 DEVMETHOD(device_probe, aac_disk_probe),
87 DEVMETHOD(device_attach, aac_disk_attach),
88 DEVMETHOD(device_detach, aac_disk_detach),
92 static driver_t aac_disk_driver = {
95 sizeof(struct aac_disk)
98 #define AAC_MAXIO 65536
100 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0);
102 /* sysctl tunables */
103 static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */
104 TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max);
106 SYSCTL_DECL(_hw_aac);
107 SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RD, &aac_iosize_max, 0,
108 "Max I/O size per transfer to an array");
111 * Handle open from generic layer.
113 * This is called by the diskslice code on first open in order to get the
114 * basic device geometry paramters.
117 aac_disk_open(struct dev_open_args *ap)
119 cdev_t dev = ap->a_head.a_dev;
121 struct disklabel *label;
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 */
140 label = &sc->ad_disk.d_label;
141 bzero(label, sizeof(*label));
142 label->d_type = DTYPE_ESDI;
143 label->d_secsize = AAC_BLOCK_SIZE;
144 label->d_nsectors = sc->ad_sectors;
145 label->d_ntracks = sc->ad_heads;
146 label->d_ncylinders = sc->ad_cylinders;
147 label->d_secpercyl = sc->ad_sectors * sc->ad_heads;
148 label->d_secperunit = sc->ad_size;
150 sc->ad_flags |= AAC_DISK_OPEN;
155 * Handle last close of the disk device.
158 aac_disk_close(struct dev_close_args *ap)
160 cdev_t dev = ap->a_head.a_dev;
165 sc = (struct aac_disk *)dev->si_drv1;
170 sc->ad_flags &= ~AAC_DISK_OPEN;
175 * Handle an I/O request.
178 aac_disk_strategy(struct dev_strategy_args *ap)
180 cdev_t dev = ap->a_head.a_dev;
181 struct bio *bio = ap->a_bio;
182 struct buf *bp = bio->bio_buf;
187 sc = (struct aac_disk *)dev->si_drv1;
191 bp->b_flags |= B_ERROR;
192 bp->b_error = EINVAL;
197 /* do-nothing operation? */
198 if (bp->b_bcount == 0) {
199 bp->b_resid = bp->b_bcount;
204 /* perform accounting */
205 devstat_start_transaction(&sc->ad_stats);
207 /* pass the bio to the controller - it can work out who we are */
208 aac_submit_bio(sc, bio);
213 * Dump memory out to an array
215 * This queues blocks of memory of size AAC_MAXIO to the controller and waits
216 * for the controller to complete the requests.
219 aac_disk_dump(struct dev_dump_args *ap)
221 cdev_t dev = ap->a_head.a_dev;
223 struct aac_softc *sc;
231 dumppages = AAC_MAXIO / PAGE_SIZE;
236 sc= ad->ad_controller;
238 blkcnt = howmany(PAGE_SIZE, ap->a_secsize);
240 while (ap->a_count > 0) {
243 if ((ap->a_count / blkcnt) < dumppages)
244 dumppages = ap->a_count / blkcnt;
246 for (i = 0; i < dumppages; ++i) {
247 vm_offset_t a = addr + (i * PAGE_SIZE);
248 if (is_physical_memory(a)) {
249 va = pmap_kenter_temporary(trunc_page(a), i);
251 va = pmap_kenter_temporary(trunc_page(0), i);
257 * Queue the block to the controller. If the queue is full,
258 * EBUSY will be returned.
260 error = aac_dump_enqueue(ad, ap->a_blkno, va, dumppages);
261 if (error && (error != EBUSY))
265 if (dumpstatus(addr, (off_t)(ap->a_count * DEV_BSIZE)) < 0)
268 ap->a_blkno += blkcnt * dumppages;
269 ap->a_count -= blkcnt * dumppages;
270 addr += PAGE_SIZE * dumppages;
276 * Either the queue was full on the last attemp, or we have no
277 * more data to dump. Let the queue drain out and retry the
278 * block if the queue was full.
280 aac_dump_complete(sc);
290 * Handle completion of an I/O request.
293 aac_biodone(struct bio *bio, const char *code)
295 struct buf *bp = bio->bio_buf;
300 sc = (struct aac_disk *)bio->bio_driver_info;
302 devstat_end_transaction_buf(&sc->ad_stats, bp);
303 if (bp->b_flags & B_ERROR) {
304 diskerr(bio, sc->ad_dev_t,
305 code, 0, 0, &sc->ad_label);
314 aac_disk_probe(device_t dev)
323 * Attach a unit to the controller.
326 aac_disk_attach(device_t dev)
332 sc = (struct aac_disk *)device_get_softc(dev);
334 /* initialise our softc */
336 (struct aac_softc *)device_get_softc(device_get_parent(dev));
337 sc->ad_container = device_get_ivars(dev);
341 * require that extended translation be enabled - other drivers read the
344 sc->ad_size = sc->ad_container->co_mntobj.Capacity;
345 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */
348 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */
355 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors));
357 device_printf(dev, "%uMB (%u sectors)\n",
358 sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE),
361 devstat_add_entry(&sc->ad_stats, "aacd", device_get_unit(dev),
362 AAC_BLOCK_SIZE, DEVSTAT_NO_ORDERED_TAGS,
363 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
364 DEVSTAT_PRIORITY_ARRAY);
366 /* attach a generic disk device to ourselves */
367 sc->ad_dev_t = disk_create(device_get_unit(dev), &sc->ad_disk, 0,
369 sc->ad_dev_t->si_drv1 = sc;
371 sc->ad_dev_t->si_iosize_max = aac_iosize_max;
372 sc->unit = device_get_unit(dev);
378 * Disconnect ourselves from the system.
381 aac_disk_detach(device_t dev)
387 sc = (struct aac_disk *)device_get_softc(dev);
389 if (sc->ad_flags & AAC_DISK_OPEN)
392 devstat_remove_entry(&sc->ad_stats);
393 disk_destroy(&sc->ad_disk);