FreeBSD/Linux Kernel Cross Reference
sys/dev/mfi/mfi_disk.c
1 /*-
2 * Copyright (c) 2006 IronPort Systems
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include "opt_mfi.h"
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/selinfo.h>
36 #include <sys/module.h>
37 #include <sys/malloc.h>
38 #include <sys/uio.h>
39
40 #include <sys/bio.h>
41 #include <sys/bus.h>
42 #include <sys/conf.h>
43 #include <sys/disk.h>
44 #include <geom/geom_disk.h>
45
46 #include <vm/vm.h>
47 #include <vm/pmap.h>
48
49 #include <machine/md_var.h>
50 #include <machine/bus.h>
51 #include <sys/rman.h>
52
53 #include <dev/mfi/mfireg.h>
54 #include <dev/mfi/mfi_ioctl.h>
55 #include <dev/mfi/mfivar.h>
56
57 static int mfi_disk_probe(device_t dev);
58 static int mfi_disk_attach(device_t dev);
59 static int mfi_disk_detach(device_t dev);
60
61 static disk_open_t mfi_disk_open;
62 static disk_close_t mfi_disk_close;
63 static disk_strategy_t mfi_disk_strategy;
64 static dumper_t mfi_disk_dump;
65
66 static devclass_t mfi_disk_devclass;
67
68 static device_method_t mfi_disk_methods[] = {
69 DEVMETHOD(device_probe, mfi_disk_probe),
70 DEVMETHOD(device_attach, mfi_disk_attach),
71 DEVMETHOD(device_detach, mfi_disk_detach),
72 { 0, 0 }
73 };
74
75 static driver_t mfi_disk_driver = {
76 "mfid",
77 mfi_disk_methods,
78 sizeof(struct mfi_disk)
79 };
80
81 DRIVER_MODULE(mfid, mfi, mfi_disk_driver, mfi_disk_devclass, 0, 0);
82
83 static int
84 mfi_disk_probe(device_t dev)
85 {
86
87 return (0);
88 }
89
90 static int
91 mfi_disk_attach(device_t dev)
92 {
93 struct mfi_disk *sc;
94 struct mfi_ld_info *ld_info;
95 uint64_t sectors;
96 uint32_t secsize;
97 char *state;
98
99 sc = device_get_softc(dev);
100 ld_info = device_get_ivars(dev);
101
102 sc->ld_dev = dev;
103 sc->ld_id = ld_info->ld_config.properties.ld.v.target_id;
104 sc->ld_unit = device_get_unit(dev);
105 sc->ld_info = ld_info;
106 sc->ld_controller = device_get_softc(device_get_parent(dev));
107 sc->ld_flags = 0;
108
109 sectors = ld_info->size;
110 secsize = MFI_SECTOR_LEN;
111 mtx_lock(&sc->ld_controller->mfi_io_lock);
112 TAILQ_INSERT_TAIL(&sc->ld_controller->mfi_ld_tqh, sc, ld_link);
113 mtx_unlock(&sc->ld_controller->mfi_io_lock);
114
115 switch (ld_info->ld_config.params.state) {
116 case MFI_LD_STATE_OFFLINE:
117 state = "offline";
118 break;
119 case MFI_LD_STATE_PARTIALLY_DEGRADED:
120 state = "partially degraded";
121 break;
122 case MFI_LD_STATE_DEGRADED:
123 state = "degraded";
124 break;
125 case MFI_LD_STATE_OPTIMAL:
126 state = "optimal";
127 break;
128 default:
129 state = "unknown";
130 break;
131 }
132 device_printf(dev, "%juMB (%ju sectors) RAID volume '%s' is %s\n",
133 sectors / (1024 * 1024 / secsize), sectors,
134 ld_info->ld_config.properties.name,
135 state);
136
137 sc->ld_disk = disk_alloc();
138 sc->ld_disk->d_drv1 = sc;
139 sc->ld_disk->d_maxsize = min(sc->ld_controller->mfi_max_io * secsize,
140 (sc->ld_controller->mfi_max_sge - 1) * PAGE_SIZE);
141 sc->ld_disk->d_name = "mfid";
142 sc->ld_disk->d_open = mfi_disk_open;
143 sc->ld_disk->d_close = mfi_disk_close;
144 sc->ld_disk->d_strategy = mfi_disk_strategy;
145 sc->ld_disk->d_dump = mfi_disk_dump;
146 sc->ld_disk->d_unit = sc->ld_unit;
147 sc->ld_disk->d_sectorsize = secsize;
148 sc->ld_disk->d_mediasize = sectors * secsize;
149 if (sc->ld_disk->d_mediasize >= (1 * 1024 * 1024)) {
150 sc->ld_disk->d_fwheads = 255;
151 sc->ld_disk->d_fwsectors = 63;
152 } else {
153 sc->ld_disk->d_fwheads = 64;
154 sc->ld_disk->d_fwsectors = 32;
155 }
156 disk_create(sc->ld_disk, DISK_VERSION);
157
158 return (0);
159 }
160
161 static int
162 mfi_disk_detach(device_t dev)
163 {
164 struct mfi_disk *sc;
165
166 sc = device_get_softc(dev);
167
168 mtx_lock(&sc->ld_controller->mfi_io_lock);
169 if (((sc->ld_disk->d_flags & DISKFLAG_OPEN) ||
170 (sc->ld_flags & MFI_DISK_FLAGS_OPEN)) &&
171 (sc->ld_controller->mfi_keep_deleted_volumes ||
172 sc->ld_controller->mfi_detaching)) {
173 mtx_unlock(&sc->ld_controller->mfi_io_lock);
174 return (EBUSY);
175 }
176 mtx_unlock(&sc->ld_controller->mfi_io_lock);
177
178 disk_destroy(sc->ld_disk);
179 mtx_lock(&sc->ld_controller->mfi_io_lock);
180 TAILQ_REMOVE(&sc->ld_controller->mfi_ld_tqh, sc, ld_link);
181 mtx_unlock(&sc->ld_controller->mfi_io_lock);
182 free(sc->ld_info, M_MFIBUF);
183 return (0);
184 }
185
186 static int
187 mfi_disk_open(struct disk *dp)
188 {
189 struct mfi_disk *sc;
190 int error;
191
192 sc = dp->d_drv1;
193 mtx_lock(&sc->ld_controller->mfi_io_lock);
194 if (sc->ld_flags & MFI_DISK_FLAGS_DISABLED)
195 error = ENXIO;
196 else {
197 sc->ld_flags |= MFI_DISK_FLAGS_OPEN;
198 error = 0;
199 }
200 mtx_unlock(&sc->ld_controller->mfi_io_lock);
201
202 return (error);
203 }
204
205 static int
206 mfi_disk_close(struct disk *dp)
207 {
208 struct mfi_disk *sc;
209
210 sc = dp->d_drv1;
211 mtx_lock(&sc->ld_controller->mfi_io_lock);
212 sc->ld_flags &= ~MFI_DISK_FLAGS_OPEN;
213 mtx_unlock(&sc->ld_controller->mfi_io_lock);
214
215 return (0);
216 }
217
218 int
219 mfi_disk_disable(struct mfi_disk *sc)
220 {
221
222 mtx_assert(&sc->ld_controller->mfi_io_lock, MA_OWNED);
223 if (sc->ld_flags & MFI_DISK_FLAGS_OPEN) {
224 if (sc->ld_controller->mfi_delete_busy_volumes)
225 return (0);
226 device_printf(sc->ld_dev, "Unable to delete busy device\n");
227 return (EBUSY);
228 }
229 sc->ld_flags |= MFI_DISK_FLAGS_DISABLED;
230 return (0);
231 }
232
233 void
234 mfi_disk_enable(struct mfi_disk *sc)
235 {
236
237 mtx_assert(&sc->ld_controller->mfi_io_lock, MA_OWNED);
238 sc->ld_flags &= ~MFI_DISK_FLAGS_DISABLED;
239 }
240
241 static void
242 mfi_disk_strategy(struct bio *bio)
243 {
244 struct mfi_disk *sc;
245 struct mfi_softc *controller;
246
247 sc = bio->bio_disk->d_drv1;
248
249 if (sc == NULL) {
250 bio->bio_error = EINVAL;
251 bio->bio_flags |= BIO_ERROR;
252 bio->bio_resid = bio->bio_bcount;
253 biodone(bio);
254 return;
255 }
256
257 controller = sc->ld_controller;
258 bio->bio_driver1 = (void *)(uintptr_t)sc->ld_id;
259 mtx_lock(&controller->mfi_io_lock);
260 mfi_enqueue_bio(controller, bio);
261 mfi_startio(controller);
262 mtx_unlock(&controller->mfi_io_lock);
263 return;
264 }
265
266 void
267 mfi_disk_complete(struct bio *bio)
268 {
269 struct mfi_disk *sc;
270 struct mfi_frame_header *hdr;
271
272 sc = bio->bio_disk->d_drv1;
273 hdr = bio->bio_driver1;
274
275 if (bio->bio_flags & BIO_ERROR) {
276 if (bio->bio_error == 0)
277 bio->bio_error = EIO;
278 disk_err(bio, "hard error", -1, 1);
279 } else {
280 bio->bio_resid = 0;
281 }
282 biodone(bio);
283 }
284
285 static int
286 mfi_disk_dump(void *arg, void *virt, vm_offset_t phys, off_t offset, size_t len)
287 {
288 struct mfi_disk *sc;
289 struct mfi_softc *parent_sc;
290 struct disk *dp;
291 int error;
292
293 dp = arg;
294 sc = dp->d_drv1;
295 parent_sc = sc->ld_controller;
296
297 if (len > 0) {
298 if ((error = mfi_dump_blocks(parent_sc, sc->ld_id, offset /
299 MFI_SECTOR_LEN, virt, len)) != 0)
300 return (error);
301 } else {
302 /* mfi_sync_cache(parent_sc, sc->ld_id); */
303 }
304
305 return (0);
306 }
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