1 /* $NetBSD: uk.c,v 1.65 2016/11/20 15:37:19 mlelstv 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 1.65 2016/11/20 15:37:19 mlelstv 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 struct uk_softc {
54 device_t sc_dev;
55
56 struct scsipi_periph *sc_periph; /* all the inter level info */
57 };
58
59 static int ukmatch(device_t, cfdata_t, void *);
60 static void ukattach(device_t, device_t, void *);
61 static int ukdetach(device_t, int);
62
63 CFATTACH_DECL_NEW(
64 uk,
65 sizeof(struct uk_softc),
66 ukmatch,
67 ukattach,
68 ukdetach,
69 NULL
70 );
71
72 extern struct cfdriver uk_cd;
73
74 static dev_type_open(ukopen);
75 static dev_type_close(ukclose);
76 static dev_type_ioctl(ukioctl);
77
78 const struct cdevsw uk_cdevsw = {
79 .d_open = ukopen,
80 .d_close = ukclose,
81 .d_read = noread,
82 .d_write = nowrite,
83 .d_ioctl = ukioctl,
84 .d_stop = nostop,
85 .d_tty = notty,
86 .d_poll = nopoll,
87 .d_mmap = nommap,
88 .d_kqfilter = nokqfilter,
89 .d_discard = nodiscard,
90 .d_flag = D_OTHER | D_MPSAFE
91 };
92
93 static int
ukmatch(device_t parent,cfdata_t match,void * aux)94 ukmatch(device_t parent, cfdata_t match, void *aux)
95 {
96 return 1;
97 }
98
99 /*
100 * The routine called by the low level scsi routine when it discovers
101 * a device suitable for this driver.
102 */
103 static void
ukattach(device_t parent,device_t self,void * aux)104 ukattach(device_t parent, device_t self, void *aux)
105 {
106 struct uk_softc *uk = device_private(self);
107 struct scsipibus_attach_args *sa = aux;
108 struct scsipi_periph *periph = sa->sa_periph;
109
110 SC_DEBUG(periph, SCSIPI_DB2, ("ukattach: "));
111 uk->sc_dev = self;
112
113 /* Store information needed to contact our base driver */
114 uk->sc_periph = periph;
115 periph->periph_dev = uk->sc_dev;
116
117 aprint_naive("\n");
118 aprint_normal("\n");
119
120 if (!pmf_device_register(self, NULL, NULL))
121 aprint_error_dev(self, "couldn't establish power handler\n");
122 }
123
124 static int
ukdetach(device_t self,int flags)125 ukdetach(device_t self, int flags)
126 {
127 int cmaj, mn;
128
129 /* locate the major number */
130 cmaj = cdevsw_lookup_major(&uk_cdevsw);
131
132 /* Nuke the vnodes for any open instances */
133 mn = device_unit(self);
134 vdevgone(cmaj, mn, mn, VCHR);
135
136 return 0;
137 }
138
139 static int
ukopen(dev_t dev,int flag,int fmt,struct lwp * l)140 ukopen(dev_t dev, int flag, int fmt, struct lwp *l)
141 {
142 int unit, error;
143 struct uk_softc *uk;
144 struct scsipi_periph *periph;
145 struct scsipi_adapter *adapt;
146
147 unit = minor(dev);
148 uk = device_lookup_private(&uk_cd, unit);
149 if (uk == NULL)
150 return ENXIO;
151
152 periph = uk->sc_periph;
153 adapt = periph->periph_channel->chan_adapter;
154
155 SC_DEBUG(periph, SCSIPI_DB1,
156 ("ukopen: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, unit,
157 uk_cd.cd_ndevs));
158
159 /* Only allow one at a time */
160 if (periph->periph_flags & PERIPH_OPEN) {
161 aprint_error_dev(uk->sc_dev, "already open\n");
162 return EBUSY;
163 }
164
165 if ((error = scsipi_adapter_addref(adapt)) != 0)
166 return error;
167 periph->periph_flags |= PERIPH_OPEN;
168
169 SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n"));
170 return 0;
171 }
172
173 static int
ukclose(dev_t dev,int flag,int fmt,struct lwp * l)174 ukclose(dev_t dev, int flag, int fmt, struct lwp *l)
175 {
176 struct uk_softc *uk = device_lookup_private(&uk_cd, minor(dev));
177 struct scsipi_periph *periph = uk->sc_periph;
178 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter;
179
180 SC_DEBUG(uk->sc_periph, SCSIPI_DB1, ("closing\n"));
181
182 scsipi_wait_drain(periph);
183
184 scsipi_adapter_delref(adapt);
185 periph->periph_flags &= ~PERIPH_OPEN;
186
187 return 0;
188 }
189
190 /*
191 * Perform special action on behalf of the user.
192 * Only does generic scsi ioctls.
193 */
194 static int
ukioctl(dev_t dev,u_long cmd,void * addr,int flag,struct lwp * l)195 ukioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l)
196 {
197 struct uk_softc *uk = device_lookup_private(&uk_cd, minor(dev));
198
199 return scsipi_do_ioctl(uk->sc_periph, dev, cmd, addr, flag, l);
200 }
201