FreeBSD/Linux Kernel Cross Reference
sys/dev/scsipi/uk.c
1 /* $NetBSD: uk.c,v 1.55 2008/06/08 18:18:34 tsutsui Exp $ */
2
3 /*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Dummy driver for a device we can't identify.
34 * Originally by Julian Elischer (julian@tfs.com)
35 */
36
37 #include <sys/cdefs.h>
38 __KERNEL_RCSID(0, "$NetBSD: uk.c,v 1.55 2008/06/08 18:18:34 tsutsui Exp $");
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42
43 #include <sys/errno.h>
44 #include <sys/ioctl.h>
45 #include <sys/device.h>
46 #include <sys/conf.h>
47 #include <sys/vnode.h>
48
49 #include <dev/scsipi/scsi_all.h>
50 #include <dev/scsipi/scsipi_all.h>
51 #include <dev/scsipi/scsiconf.h>
52
53 #define UKUNIT(z) (minor(z))
54
55 struct uk_softc {
56 struct device sc_dev;
57
58 struct scsipi_periph *sc_periph; /* all the inter level info */
59 };
60
61 static int ukmatch(struct device *, struct cfdata *, void *);
62 static void ukattach(struct device *, struct device *, void *);
63 static int ukactivate(struct device *, enum devact);
64 static int ukdetach(struct device *, int);
65
66
67 CFATTACH_DECL(uk, sizeof(struct uk_softc), ukmatch, ukattach, ukdetach,
68 ukactivate);
69
70 extern struct cfdriver uk_cd;
71
72 static dev_type_open(ukopen);
73 static dev_type_close(ukclose);
74 static dev_type_ioctl(ukioctl);
75
76 const struct cdevsw uk_cdevsw = {
77 ukopen, ukclose, noread, nowrite, ukioctl,
78 nostop, notty, nopoll, nommap, nokqfilter, D_OTHER,
79 };
80
81 static int
82 ukmatch(struct device *parent, struct cfdata *match,
83 void *aux)
84 {
85
86 return (1);
87 }
88
89 /*
90 * The routine called by the low level scsi routine when it discovers
91 * a device suitable for this driver.
92 */
93 static void
94 ukattach(struct device *parent, struct device *self, void *aux)
95 {
96 struct uk_softc *uk = device_private(self);
97 struct scsipibus_attach_args *sa = aux;
98 struct scsipi_periph *periph = sa->sa_periph;
99
100 SC_DEBUG(periph, SCSIPI_DB2, ("ukattach: "));
101
102 /*
103 * Store information needed to contact our base driver
104 */
105 uk->sc_periph = periph;
106 periph->periph_dev = &uk->sc_dev;
107
108 printf("\n");
109 }
110
111 static int
112 ukactivate(struct device *self, enum devact act)
113 {
114 int rv = 0;
115
116 switch (act) {
117 case DVACT_ACTIVATE:
118 rv = EOPNOTSUPP;
119 break;
120
121 case DVACT_DEACTIVATE:
122 /*
123 * Nothing to do; we key off the device's DVF_ACTIVE.
124 */
125 break;
126 }
127 return (rv);
128 }
129
130 static int
131 ukdetach(struct device *self, int flags)
132 {
133 /*struct uk_softc *uk = device_private(self);*/
134 int cmaj, mn;
135
136 /* locate the major number */
137 cmaj = cdevsw_lookup_major(&uk_cdevsw);
138
139 /* Nuke the vnodes for any open instances */
140 mn = device_unit(self);
141 vdevgone(cmaj, mn, mn, VCHR);
142
143 return (0);
144 }
145
146 /*
147 * open the device.
148 */
149 static int
150 ukopen(dev_t dev, int flag, int fmt, struct lwp *l)
151 {
152 int unit, error;
153 struct uk_softc *uk;
154 struct scsipi_periph *periph;
155 struct scsipi_adapter *adapt;
156
157 unit = UKUNIT(dev);
158 uk = device_lookup_private(&uk_cd, unit);
159 if (uk == NULL)
160 return (ENXIO);
161
162 periph = uk->sc_periph;
163 adapt = periph->periph_channel->chan_adapter;
164
165 SC_DEBUG(periph, SCSIPI_DB1,
166 ("ukopen: dev=0x%x (unit %d (of %d))\n", dev, unit,
167 uk_cd.cd_ndevs));
168
169 /*
170 * Only allow one at a time
171 */
172 if (periph->periph_flags & PERIPH_OPEN) {
173 aprint_error_dev(&uk->sc_dev, "already open\n");
174 return (EBUSY);
175 }
176
177 if ((error = scsipi_adapter_addref(adapt)) != 0)
178 return (error);
179 periph->periph_flags |= PERIPH_OPEN;
180
181 SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n"));
182 return (0);
183 }
184
185 /*
186 * close the device.. only called if we are the LAST
187 * occurence of an open device
188 */
189 static int
190 ukclose(dev_t dev, int flag, int fmt, struct lwp *l)
191 {
192 struct uk_softc *uk = device_lookup_private(&uk_cd, UKUNIT(dev));
193 struct scsipi_periph *periph = uk->sc_periph;
194 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter;
195
196 SC_DEBUG(uk->sc_periph, SCSIPI_DB1, ("closing\n"));
197
198 scsipi_wait_drain(periph);
199
200 scsipi_adapter_delref(adapt);
201 periph->periph_flags &= ~PERIPH_OPEN;
202
203 return (0);
204 }
205
206 /*
207 * Perform special action on behalf of the user
208 * Only does generic scsi ioctls.
209 */
210 static int
211 ukioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l)
212 {
213 struct uk_softc *uk = device_lookup_private(&uk_cd, UKUNIT(dev));
214
215 return (scsipi_do_ioctl(uk->sc_periph, dev, cmd, addr, flag, l));
216 }
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