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 |
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 |
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 |
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 |
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 |
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 |
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 | |