1/* $NetBSD: ata_raid.c,v 1.39 2016/09/27 08:05:34 pgoyette Exp $ */
2
3/*
4 * Copyright (c) 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38/*
39 * Support for autoconfiguration of RAID sets on ATA RAID controllers.
40 */
41
42#include <sys/cdefs.h>
43__KERNEL_RCSID(0, "$NetBSD: ata_raid.c,v 1.39 2016/09/27 08:05:34 pgoyette Exp $");
44
45#include <sys/param.h>
46#include <sys/buf.h>
47#include <sys/bufq.h>
48#include <sys/conf.h>
49#include <sys/device.h>
50#include <sys/disk.h>
51#include <sys/disklabel.h>
52#include <sys/fcntl.h>
53#include <sys/malloc.h>
54#include <sys/vnode.h>
55#include <sys/proc.h>
56#include <sys/module.h>
57
58#include <miscfs/specfs/specdev.h>
59
60#include <dev/ata/atareg.h>
61#include <dev/ata/atavar.h>
62#include <dev/ata/wdvar.h>
63
64#include <dev/ata/ata_raidreg.h>
65#include <dev/ata/ata_raidvar.h>
66
67#include "locators.h"
68#include "ioconf.h"
69
70#ifdef ATA_RAID_DEBUG
71#define DPRINTF(x) printf x
72#else
73#define DPRINTF(x) /* nothing */
74#endif
75
76static int ataraid_match(device_t, cfdata_t, void *);
77static void ataraid_attach(device_t, device_t, void *);
78static int ataraid_rescan(device_t, const char *, const int *);
79static int ataraid_print(void *, const char *);
80
81static int ata_raid_finalize(device_t);
82
83static int finalize_done;
84
85ataraid_array_info_list_t ataraid_array_info_list =
86 TAILQ_HEAD_INITIALIZER(ataraid_array_info_list);
87u_int ataraid_array_info_count;
88
89CFATTACH_DECL3_NEW(ataraid, 0,
90 ataraid_match, ataraid_attach, NULL, NULL, ataraid_rescan, NULL, 0);
91
92/*
93 * ataraidattach:
94 *
95 * Pseudo-device attach routine.
96 */
97void
98ataraidattach(int count)
99{
100
101 /*
102 * Register a finalizer which will be used to actually configure
103 * the logical disks configured by ataraid.
104 */
105 finalize_done = 0;
106 if (config_finalize_register(NULL, ata_raid_finalize) != 0)
107 aprint_normal("WARNING: "
108 "unable to register ATA RAID finalizer\n");
109}
110
111/*
112 * Use the config_finalizer to rescan for new devices, since the
113 * ld_ataraid driver might not be immediately available.
114 */
115
116/* ARGSUSED */
117static int
118ataraid_rescan(device_t self, const char *attr, const int *flags)
119{
120
121 finalize_done = 0;
122 (void)ata_raid_finalize(self);
123
124 return 0;
125}
126
127/*
128 * ata_raid_type_name:
129 *
130 * Return the type of ATA RAID.
131 */
132const char *
133ata_raid_type_name(u_int type)
134{
135 static const char *ata_raid_type_names[] = {
136 "Promise",
137 "Adaptec",
138 "VIA V-RAID",
139 "nVidia",
140 "JMicron",
141 "Intel MatrixRAID"
142 };
143
144 if (type < __arraycount(ata_raid_type_names))
145 return (ata_raid_type_names[type]);
146
147 return (NULL);
148}
149
150/*
151 * ata_raid_finalize:
152 *
153 * Autoconfiguration finalizer for ATA RAID.
154 */
155static int
156ata_raid_finalize(device_t self)
157{
158 static struct cfdata ataraid_cfdata = {
159 .cf_name = "ataraid",
160 .cf_atname = "ataraid",
161 .cf_unit = 0,
162 .cf_fstate = FSTATE_STAR,
163 };
164
165 /*
166 * Only run once for each instantiation
167 */
168 if (finalize_done)
169 return 0;
170 finalize_done = 1;
171
172 if (TAILQ_EMPTY(&ataraid_array_info_list))
173 goto out;
174
175 if (config_attach_pseudo(&ataraid_cfdata) == NULL)
176 printf("%s: unable to attach an instance\n",
177 ataraid_cd.cd_name);
178
179 out:
180 return (1);
181}
182
183/*
184 * ataraid_match:
185 *
186 * Autoconfiguration glue: match routine.
187 */
188static int
189ataraid_match(device_t parent, cfdata_t cf, void *aux)
190{
191
192 /* pseudo-device; always present */
193 return (1);
194}
195
196/*
197 * ataraid_attach:
198 *
199 * Autoconfiguration glue: attach routine. We attach the children.
200 */
201static void
202ataraid_attach(device_t parent, device_t self, void *aux)
203{
204 struct ataraid_array_info *aai;
205 int locs[ATARAIDCF_NLOCS];
206
207 /*
208 * We're a pseudo-device, so we get to announce our own
209 * presence.
210 */
211 aprint_normal_dev(self, "found %u RAID volume%s\n",
212 ataraid_array_info_count,
213 ataraid_array_info_count == 1 ? "" : "s");
214
215 TAILQ_FOREACH(aai, &ataraid_array_info_list, aai_list) {
216 locs[ATARAIDCF_VENDTYPE] = aai->aai_type;
217 locs[ATARAIDCF_UNIT] = aai->aai_arrayno;
218
219 config_found_sm_loc(self, "ataraid", locs, aai,
220 ataraid_print, config_stdsubmatch);
221 }
222}
223
224/*
225 * ataraid_print:
226 *
227 * Autoconfiguration glue: print routine.
228 */
229static int
230ataraid_print(void *aux, const char *pnp)
231{
232 struct ataraid_array_info *aai = aux;
233
234 if (pnp != NULL)
235 aprint_normal("block device at %s", pnp);
236 aprint_normal(" vendtype %d unit %d", aai->aai_type, aai->aai_arrayno);
237 return (UNCONF);
238}
239
240/*
241 * ata_raid_check_component:
242 *
243 * Check the component for a RAID configuration structure.
244 * Called via autoconfiguration callback.
245 */
246void
247ata_raid_check_component(device_t self)
248{
249 struct wd_softc *sc = device_private(self);
250
251 if (ata_raid_read_config_adaptec(sc) == 0)
252 return;
253 if (ata_raid_read_config_promise(sc) == 0)
254 return;
255 if (ata_raid_read_config_via(sc) == 0)
256 return;
257 if (ata_raid_read_config_nvidia(sc) == 0)
258 return;
259 if (ata_raid_read_config_jmicron(sc) == 0)
260 return;
261 if (ata_raid_read_config_intel(sc) == 0)
262 return;
263}
264
265struct ataraid_array_info *
266ata_raid_get_array_info(u_int type, u_int arrayno)
267{
268 struct ataraid_array_info *aai, *laai;
269
270 TAILQ_FOREACH(aai, &ataraid_array_info_list, aai_list) {
271 if (aai->aai_type == type &&
272 aai->aai_arrayno == arrayno)
273 goto out;
274 }
275
276 /* Need to allocate a new one. */
277 aai = malloc(sizeof(*aai), M_DEVBUF, M_WAITOK | M_ZERO);
278 aai->aai_type = type;
279 aai->aai_arrayno = arrayno;
280 aai->aai_curdisk = 0;
281
282 ataraid_array_info_count++;
283
284 /* Sort it into the list: type first, then array number. */
285 TAILQ_FOREACH(laai, &ataraid_array_info_list, aai_list) {
286 if (aai->aai_type < laai->aai_type) {
287 TAILQ_INSERT_BEFORE(laai, aai, aai_list);
288 goto out;
289 }
290 if (aai->aai_type == laai->aai_type &&
291 aai->aai_arrayno < laai->aai_arrayno) {
292 TAILQ_INSERT_BEFORE(laai, aai, aai_list);
293 goto out;
294 }
295 }
296 TAILQ_INSERT_TAIL(&ataraid_array_info_list, aai, aai_list);
297
298 out:
299 return (aai);
300}
301
302int
303ata_raid_config_block_rw(struct vnode *vp, daddr_t blkno, void *tbuf,
304 size_t size, int bflags)
305{
306 struct buf *bp;
307 int error;
308
309 bp = getiobuf(vp, false);
310 bp->b_blkno = blkno;
311 bp->b_bcount = bp->b_resid = size;
312 bp->b_flags = bflags;
313 bp->b_proc = curproc;
314 bp->b_data = tbuf;
315 SET(bp->b_cflags, BC_BUSY); /* mark buffer busy */
316
317 VOP_STRATEGY(vp, bp);
318 error = biowait(bp);
319
320 putiobuf(bp);
321 return (error);
322}
323
324MODULE(MODULE_CLASS_DRIVER, ataraid, "");
325
326#ifdef _MODULE
327CFDRIVER_DECL(ataraid, DV_DISK, NULL);
328#endif
329
330static int
331ataraid_modcmd(modcmd_t cmd, void *arg)
332{
333 int error = 0;
334
335 switch (cmd) {
336 case MODULE_CMD_INIT:
337#ifdef _MODULE
338 error = config_cfdriver_attach(&ataraid_cd);
339 if (error)
340 break;
341
342 error = config_cfattach_attach(ataraid_cd.cd_name, &ataraid_ca);
343 if (error) {
344 config_cfdriver_detach(&ataraid_cd);
345 aprint_error("%s: unable to register cfattach for \n"
346 "%s, error %d", __func__, ataraid_cd.cd_name,
347 error);
348 break;
349 }
350#endif
351 break;
352 case MODULE_CMD_FINI:
353#ifdef _MODULE
354
355 error = config_cfattach_detach(ataraid_cd.cd_name, &ataraid_ca);
356 if (error) {
357 aprint_error("%s: failed to detach %s cfattach, "
358 "error %d\n", __func__, ataraid_cd.cd_name, error);
359 break;
360 }
361 error = config_cfdriver_detach(&ataraid_cd);
362 if (error) {
363 (void)config_cfattach_attach(ataraid_cd.cd_name,
364 &ataraid_ca);
365 aprint_error("%s: failed to detach %s cfdriver, "
366 "error %d\n", __func__, ataraid_cd.cd_name, error);
367 break;
368 }
369#endif
370 break;
371 case MODULE_CMD_STAT:
372 default:
373 error = ENOTTY;
374 }
375
376 return error;
377}
378