uk.c revision 1.63
1 /* $NetBSD: uk.c,v 1.63 2016/07/14 04:00:46 msaitoh 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 (at) tfs.com) 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: uk.c,v 1.63 2016/07/14 04:00:46 msaitoh 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 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 } 120 121 static int 122 ukdetach(device_t self, int flags) 123 { 124 int cmaj, mn; 125 126 /* locate the major number */ 127 cmaj = cdevsw_lookup_major(&uk_cdevsw); 128 129 /* Nuke the vnodes for any open instances */ 130 mn = device_unit(self); 131 vdevgone(cmaj, mn, mn, VCHR); 132 133 return 0; 134 } 135 136 static int 137 ukopen(dev_t dev, int flag, int fmt, struct lwp *l) 138 { 139 int unit, error; 140 struct uk_softc *uk; 141 struct scsipi_periph *periph; 142 struct scsipi_adapter *adapt; 143 144 unit = minor(dev); 145 uk = device_lookup_private(&uk_cd, unit); 146 if (uk == NULL) 147 return ENXIO; 148 149 periph = uk->sc_periph; 150 adapt = periph->periph_channel->chan_adapter; 151 152 SC_DEBUG(periph, SCSIPI_DB1, 153 ("ukopen: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, unit, 154 uk_cd.cd_ndevs)); 155 156 /* Only allow one at a time */ 157 if (periph->periph_flags & PERIPH_OPEN) { 158 aprint_error_dev(uk->sc_dev, "already open\n"); 159 return EBUSY; 160 } 161 162 if ((error = scsipi_adapter_addref(adapt)) != 0) 163 return error; 164 periph->periph_flags |= PERIPH_OPEN; 165 166 SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n")); 167 return 0; 168 } 169 170 static int 171 ukclose(dev_t dev, int flag, int fmt, struct lwp *l) 172 { 173 struct uk_softc *uk = device_lookup_private(&uk_cd, minor(dev)); 174 struct scsipi_periph *periph = uk->sc_periph; 175 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 176 177 SC_DEBUG(uk->sc_periph, SCSIPI_DB1, ("closing\n")); 178 179 scsipi_wait_drain(periph); 180 181 scsipi_adapter_delref(adapt); 182 periph->periph_flags &= ~PERIPH_OPEN; 183 184 return 0; 185 } 186 187 /* 188 * Perform special action on behalf of the user. 189 * Only does generic scsi ioctls. 190 */ 191 static int 192 ukioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 193 { 194 struct uk_softc *uk = device_lookup_private(&uk_cd, minor(dev)); 195 196 return scsipi_do_ioctl(uk->sc_periph, dev, cmd, addr, flag, l); 197 } 198
Indexes created Fri Sep 26 08:10:20 GMT 2025