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nrelease - fix/improve livecd
[dragonfly.git] / sys / dev / raid / mfi / mfi_syspd.c
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17566092
SW		 1/*-
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that the following conditions
4 * are met:
5 *
6 * Copyright 1994-2009 The FreeBSD Project.
7 * All rights reserved.
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
17 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY,OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY THEORY
23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
24 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * The views and conclusions contained in the software and documentation
28 * are those of the authors and should not be interpreted as representing
29 * official policies,either expressed or implied, of the FreeBSD Project.
30 *
31 * $FreeBSD: src/sys/dev/mfi/mfi_pddisk.c,v 1.2.2.6 2007/08/24 17:29:18 jhb Exp $
590ba11d 32 * FreeBSD projects/head_mfi/ r232888
17566092
SW		 33 */
34
35#include "opt_mfi.h"
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/kernel.h>
40#include <sys/module.h>
41#include <sys/malloc.h>
42#include <sys/uio.h>
43
44#include <sys/bio.h>
45#include <sys/buf2.h>
46#include <sys/bus.h>
47#include <sys/conf.h>
48#include <sys/disk.h>
49
50#include <vm/vm.h>
51#include <vm/pmap.h>
52
53#include <machine/md_var.h>
54#include <sys/rman.h>
55
56#include <dev/raid/mfi/mfireg.h>
57#include <dev/raid/mfi/mfi_ioctl.h>
58#include <dev/raid/mfi/mfivar.h>
59
60static int mfi_syspd_probe(device_t dev);
61static int mfi_syspd_attach(device_t dev);
62static int mfi_syspd_detach(device_t dev);
63
64static d_open_t mfi_syspd_open;
65static d_close_t mfi_syspd_close;
66static d_strategy_t mfi_syspd_strategy;
67static d_dump_t mfi_syspd_dump;
68
69static struct dev_ops mfi_syspd_ops = {
986e2176 70 { "mfisyspd", 0, D_DISK | D_MPSAFE },
17566092
SW		 71 .d_open = mfi_syspd_open,
72 .d_close = mfi_syspd_close,
73 .d_strategy = mfi_syspd_strategy,
74 .d_dump = mfi_syspd_dump,
75};
76
77static devclass_t mfi_syspd_devclass;
78
79static device_method_t mfi_syspd_methods[] = {
80 DEVMETHOD(device_probe, mfi_syspd_probe),
81 DEVMETHOD(device_attach, mfi_syspd_attach),
82 DEVMETHOD(device_detach, mfi_syspd_detach),
d3c9c58e 83 DEVMETHOD_END
17566092
SW		 84};
85
86static driver_t mfi_syspd_driver = {
87 "mfisyspd",
88 mfi_syspd_methods,
89 sizeof(struct mfi_system_pd)
90};
91
8515b7f9 92DRIVER_MODULE(mfisyspd, mfi, mfi_syspd_driver, mfi_syspd_devclass, NULL, NULL);
17566092
SW		 93
94static int
95mfi_syspd_probe(device_t dev)
96{
97
98 return (0);
99}
100
101static int
102mfi_syspd_attach(device_t dev)
103{
104 struct mfi_system_pd *sc;
105 struct mfi_pd_info *pd_info;
106 struct disk_info info;
107 uint64_t sectors;
108 uint32_t secsize;
109
110 sc = device_get_softc(dev);
111 pd_info = device_get_ivars(dev);
112
113 sc->pd_dev = dev;
114 sc->pd_id = pd_info->ref.v.device_id;
115 sc->pd_unit = device_get_unit(dev);
116 sc->pd_info = pd_info;
117 sc->pd_controller = device_get_softc(device_get_parent(dev));
118 sc->pd_flags = MFI_DISK_FLAGS_SYSPD;
119
120 sectors = pd_info->raw_size;
121 secsize = MFI_SECTOR_LEN;
122 lockmgr(&sc->pd_controller->mfi_io_lock, LK_EXCLUSIVE);
123 TAILQ_INSERT_TAIL(&sc->pd_controller->mfi_syspd_tqh, sc, pd_link);
124 lockmgr(&sc->pd_controller->mfi_io_lock, LK_RELEASE);
125 device_printf(dev, "%juMB (%ju sectors) SYSPD volume\n",
126 sectors / (1024 * 1024 / secsize), sectors);
127
128 devstat_add_entry(&sc->pd_devstat, "mfisyspd", device_get_unit(dev),
129 MFI_SECTOR_LEN, DEVSTAT_NO_ORDERED_TAGS,
130 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
131 DEVSTAT_PRIORITY_ARRAY);
132
9049decf
SW		 133 sc->pd_dev_t = disk_create(sc->pd_unit, &sc->pd_disk, &mfi_syspd_ops);
134 sc->pd_dev_t->si_drv1 = sc;
135 sc->pd_dev_t->si_iosize_max = sc->pd_controller->mfi_max_io *
17566092
SW		 136 secsize;
137
138 bzero(&info, sizeof(info));
139 info.d_media_blksize = secsize; /* mandatory */
140 info.d_media_blocks = sectors;
141
142 if (info.d_media_blocks >= (1 * 1024 * 1024)) {
143 info.d_nheads = 255;
144 info.d_secpertrack = 63;
145 } else {
146 info.d_nheads = 64;
147 info.d_secpertrack = 32;
148 }
149
150 disk_setdiskinfo(&sc->pd_disk, &info);
151
17566092
SW		 152 return (0);
153}
154
155static int
156mfi_syspd_detach(device_t dev)
157{
158 struct mfi_system_pd *sc;
159
160 sc = device_get_softc(dev);
17566092
SW		 161 lockmgr(&sc->pd_controller->mfi_io_lock, LK_EXCLUSIVE);
162 if ((sc->pd_flags & MFI_DISK_FLAGS_OPEN) &&
163 (sc->pd_controller->mfi_keep_deleted_volumes ||
164 sc->pd_controller->mfi_detaching)) {
165 lockmgr(&sc->pd_controller->mfi_io_lock, LK_RELEASE);
17566092
SW		 166 return (EBUSY);
167 }
168 lockmgr(&sc->pd_controller->mfi_io_lock, LK_RELEASE);
169
170 disk_destroy(&sc->pd_disk);
171 devstat_remove_entry(&sc->pd_devstat);
172 lockmgr(&sc->pd_controller->mfi_io_lock, LK_EXCLUSIVE);
173 TAILQ_REMOVE(&sc->pd_controller->mfi_syspd_tqh, sc, pd_link);
174 lockmgr(&sc->pd_controller->mfi_io_lock, LK_RELEASE);
175 kfree(sc->pd_info, M_MFIBUF);
176 return (0);
177}
178
179static int
180mfi_syspd_open(struct dev_open_args *ap)
181{
182 struct mfi_system_pd *sc = ap->a_head.a_dev->si_drv1;
183 int error;
184
185 lockmgr(&sc->pd_controller->mfi_io_lock, LK_EXCLUSIVE);
186 if (sc->pd_flags & MFI_DISK_FLAGS_DISABLED)
187 error = ENXIO;
188 else {
189 sc->pd_flags |= MFI_DISK_FLAGS_OPEN;
190 error = 0;
191 }
192 lockmgr(&sc->pd_controller->mfi_io_lock, LK_RELEASE);
193 return (error);
194}
195
196static int
197mfi_syspd_close(struct dev_close_args *ap)
198{
199 struct mfi_system_pd *sc = ap->a_head.a_dev->si_drv1;
200
201 lockmgr(&sc->pd_controller->mfi_io_lock, LK_EXCLUSIVE);
202 sc->pd_flags &= ~MFI_DISK_FLAGS_OPEN;
203 lockmgr(&sc->pd_controller->mfi_io_lock, LK_RELEASE);
204
205 return (0);
206}
207
208int
209mfi_syspd_disable(struct mfi_system_pd *sc)
210{
211
148e9c0b 212 mfi_lockassert(&sc->pd_controller->mfi_io_lock);
17566092
SW		 213 if (sc->pd_flags & MFI_DISK_FLAGS_OPEN) {
214 if (sc->pd_controller->mfi_delete_busy_volumes)
215 return (0);
590ba11d
SW		 216 device_printf(sc->pd_dev,
217 "Unable to delete busy syspd device\n");
17566092
SW		 218 return (EBUSY);
219 }
220 sc->pd_flags |= MFI_DISK_FLAGS_DISABLED;
221 return (0);
222}
223
224void
225mfi_syspd_enable(struct mfi_system_pd *sc)
226{
227
148e9c0b 228 mfi_lockassert(&sc->pd_controller->mfi_io_lock);
17566092
SW		 229 sc->pd_flags &= ~MFI_DISK_FLAGS_DISABLED;
230}
231
232static int
233mfi_syspd_strategy(struct dev_strategy_args *ap)
234{
235 struct bio *bio = ap->a_bio;
236 struct buf *bp = bio->bio_buf;
237 struct mfi_system_pd *sc = ap->a_head.a_dev->si_drv1;
25641c66 238 struct mfi_softc *controller;
17566092
SW		 239
240 if (sc == NULL) {
241 bp->b_error = EINVAL;
242 bp->b_flags |= B_ERROR;
243 bp->b_resid = bp->b_bcount;
244 biodone(bio);
245 return (0);
246 }
25641c66 247 controller = sc->pd_controller;
17566092 248
590ba11d
SW		 249 if (controller->hw_crit_error) {
250 bp->b_error = EBUSY;
251 return (0);
252 }
253
254 if (controller->issuepend_done == 0) {
255 bp->b_error = EBUSY;
256 return (0);
257 }
258
17566092
SW		 259 /*
260 * XXX swildner
261 *
262 * If it's a null transfer, do nothing. FreeBSD's original driver
263 * doesn't have this, but that caused hard error messages (even
264 * though everything else continued to work fine). Interestingly,
265 * only when HAMMER was used.
266 *
267 * Several others of our RAID drivers have this check, such as
268 * aac(4) and ida(4), so we insert it here, too.
269 *
270 * The cause of null transfers is yet unknown.
271 */
272 if (bp->b_bcount == 0) {
273 bp->b_resid = bp->b_bcount;
274 biodone(bio);
275 return (0);
276 }
277
17566092
SW		 278 bio->bio_driver_info = sc;
279 lockmgr(&controller->mfi_io_lock, LK_EXCLUSIVE);
280 mfi_enqueue_bio(controller, bio);
281 devstat_start_transaction(&sc->pd_devstat);
282 mfi_startio(controller);
283 lockmgr(&controller->mfi_io_lock, LK_RELEASE);
284 return (0);
285}
286
17566092
SW		 287static int
288mfi_syspd_dump(struct dev_dump_args *ap)
289{
290 cdev_t dev = ap->a_head.a_dev;
291 off_t offset = ap->a_offset;
292 void *virt = ap->a_virtual;
293 size_t len = ap->a_length;
294 struct mfi_system_pd *sc;
295 struct mfi_softc *parent_sc;
296 int error;
297
298 sc = dev->si_drv1;
299 parent_sc = sc->pd_controller;
300
301 if (len > 0) {
590ba11d
SW		 302 if ((error = mfi_dump_syspd_blocks(parent_sc,
303 sc->pd_id, offset / MFI_SECTOR_LEN, virt, len)) != 0)
17566092
SW		 304 return (error);
305 } else {
306 /* mfi_sync_cache(parent_sc, sc->ld_id); */
307 }
308 return (0);
309}
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