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 = sc->ld_controller->mfi_max_io * secsize;
140 sc->ld_disk->d_name = "mfid";
141 sc->ld_disk->d_open = mfi_disk_open;
142 sc->ld_disk->d_close = mfi_disk_close;
143 sc->ld_disk->d_strategy = mfi_disk_strategy;
144 sc->ld_disk->d_dump = mfi_disk_dump;
145 sc->ld_disk->d_unit = sc->ld_unit;
146 sc->ld_disk->d_sectorsize = secsize;
147 sc->ld_disk->d_mediasize = sectors * secsize;
148 if (sc->ld_disk->d_mediasize >= (1 * 1024 * 1024)) {
149 sc->ld_disk->d_fwheads = 255;
150 sc->ld_disk->d_fwsectors = 63;
151 } else {
152 sc->ld_disk->d_fwheads = 64;
153 sc->ld_disk->d_fwsectors = 32;
154 }
155 disk_create(sc->ld_disk, DISK_VERSION);
156
157 return (0);
158 }
159
160 static int
161 mfi_disk_detach(device_t dev)
162 {
163 struct mfi_disk *sc;
164
165 sc = device_get_softc(dev);
166
167 mtx_lock(&sc->ld_controller->mfi_io_lock);
168 if (((sc->ld_disk->d_flags & DISKFLAG_OPEN) ||
169 (sc->ld_flags & MFI_DISK_FLAGS_OPEN)) &&
170 (sc->ld_controller->mfi_keep_deleted_volumes ||
171 sc->ld_controller->mfi_detaching)) {
172 mtx_unlock(&sc->ld_controller->mfi_io_lock);
173 return (EBUSY);
174 }
175 mtx_unlock(&sc->ld_controller->mfi_io_lock);
176
177 disk_destroy(sc->ld_disk);
178 mtx_lock(&sc->ld_controller->mfi_io_lock);
179 TAILQ_REMOVE(&sc->ld_controller->mfi_ld_tqh, sc, ld_link);
180 mtx_unlock(&sc->ld_controller->mfi_io_lock);
181 free(sc->ld_info, M_MFIBUF);
182 return (0);
183 }
184
185 static int
186 mfi_disk_open(struct disk *dp)
187 {
188 struct mfi_disk *sc;
189 int error;
190
191 sc = dp->d_drv1;
192 mtx_lock(&sc->ld_controller->mfi_io_lock);
193 if (sc->ld_flags & MFI_DISK_FLAGS_DISABLED)
194 error = ENXIO;
195 else {
196 sc->ld_flags |= MFI_DISK_FLAGS_OPEN;
197 error = 0;
198 }
199 mtx_unlock(&sc->ld_controller->mfi_io_lock);
200
201 return (error);
202 }
203
204 static int
205 mfi_disk_close(struct disk *dp)
206 {
207 struct mfi_disk *sc;
208
209 sc = dp->d_drv1;
210 mtx_lock(&sc->ld_controller->mfi_io_lock);
211 sc->ld_flags &= ~MFI_DISK_FLAGS_OPEN;
212 mtx_unlock(&sc->ld_controller->mfi_io_lock);
213
214 return (0);
215 }
216
217 int
218 mfi_disk_disable(struct mfi_disk *sc)
219 {
220
221 mtx_assert(&sc->ld_controller->mfi_io_lock, MA_OWNED);
222 if (sc->ld_flags & MFI_DISK_FLAGS_OPEN) {
223 if (sc->ld_controller->mfi_delete_busy_volumes)
224 return (0);
225 device_printf(sc->ld_dev, "Unable to delete busy device\n");
226 return (EBUSY);
227 }
228 sc->ld_flags |= MFI_DISK_FLAGS_DISABLED;
229 return (0);
230 }
231
232 void
233 mfi_disk_enable(struct mfi_disk *sc)
234 {
235
236 mtx_assert(&sc->ld_controller->mfi_io_lock, MA_OWNED);
237 sc->ld_flags &= ~MFI_DISK_FLAGS_DISABLED;
238 }
239
240 static void
241 mfi_disk_strategy(struct bio *bio)
242 {
243 struct mfi_disk *sc;
244 struct mfi_softc *controller;
245
246 sc = bio->bio_disk->d_drv1;
247
248 if (sc == NULL) {
249 bio->bio_error = EINVAL;
250 bio->bio_flags |= BIO_ERROR;
251 bio->bio_resid = bio->bio_bcount;
252 biodone(bio);
253 return;
254 }
255
256 controller = sc->ld_controller;
257 bio->bio_driver1 = (void *)(uintptr_t)sc->ld_id;
258 mtx_lock(&controller->mfi_io_lock);
259 mfi_enqueue_bio(controller, bio);
260 mfi_startio(controller);
261 mtx_unlock(&controller->mfi_io_lock);
262 return;
263 }
264
265 void
266 mfi_disk_complete(struct bio *bio)
267 {
268 struct mfi_disk *sc;
269 struct mfi_frame_header *hdr;
270
271 sc = bio->bio_disk->d_drv1;
272 hdr = bio->bio_driver1;
273
274 if (bio->bio_flags & BIO_ERROR) {
275 if (bio->bio_error == 0)
276 bio->bio_error = EIO;
277 disk_err(bio, "hard error", -1, 1);
278 } else {
279 bio->bio_resid = 0;
280 }
281 biodone(bio);
282 }
283
284 static int
285 mfi_disk_dump(void *arg, void *virt, vm_offset_t phys, off_t offset, size_t len)
286 {
287 struct mfi_disk *sc;
288 struct mfi_softc *parent_sc;
289 struct disk *dp;
290 int error;
291
292 dp = arg;
293 sc = dp->d_drv1;
294 parent_sc = sc->ld_controller;
295
296 if (len > 0) {
297 if ((error = mfi_dump_blocks(parent_sc, sc->ld_id, offset /
298 MFI_SECTOR_LEN, virt, len)) != 0)
299 return (error);
300 } else {
301 /* mfi_sync_cache(parent_sc, sc->ld_id); */
302 }
303
304 return (0);
305 }
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