1 /* $NetBSD: uk.c,v 1.41 2003/09/08 01:26:42 mycroft 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Dummy driver for a device we can't identify. 41 * Originally by Julian Elischer (julian@tfs.com) 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: uk.c,v 1.41 2003/09/08 01:26:42 mycroft Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 50 #include <sys/errno.h> 51 #include <sys/ioctl.h> 52 #include <sys/device.h> 53 #include <sys/conf.h> 54 #include <sys/vnode.h> 55 56 #include <dev/scsipi/scsi_all.h> 57 #include <dev/scsipi/scsipi_all.h> 58 #include <dev/scsipi/scsiconf.h> 59 60 #define UKUNIT(z) (minor(z)) 61 62 struct uk_softc { 63 struct device sc_dev; 64 65 struct scsipi_periph *sc_periph; /* all the inter level info */ 66 }; 67 68 int ukmatch __P((struct device *, struct cfdata *, void *)); 69 void ukattach __P((struct device *, struct device *, void *)); 70 int ukactivate __P((struct device *, enum devact)); 71 int ukdetach __P((struct device *, int)); 72 73 74 CFATTACH_DECL(uk, sizeof(struct uk_softc), ukmatch, ukattach, ukdetach, 75 ukactivate); 76 77 extern struct cfdriver uk_cd; 78 79 dev_type_open(ukopen); 80 dev_type_close(ukclose); 81 dev_type_ioctl(ukioctl); 82 83 const struct cdevsw uk_cdevsw = { 84 ukopen, ukclose, noread, nowrite, ukioctl, 85 nostop, notty, nopoll, nommap, nokqfilter, 86 }; 87 88 int 89 ukmatch(parent, match, aux) 90 struct device *parent; 91 struct cfdata *match; 92 void *aux; 93 { 94 95 return (1); 96 } 97 98 /* 99 * The routine called by the low level scsi routine when it discovers 100 * a device suitable for this driver. 101 */ 102 void 103 ukattach(parent, self, aux) 104 struct device *parent, *self; 105 void *aux; 106 { 107 struct uk_softc *uk = (void *)self; 108 struct scsipibus_attach_args *sa = aux; 109 struct scsipi_periph *periph = sa->sa_periph; 110 111 SC_DEBUG(periph, SCSIPI_DB2, ("ukattach: ")); 112 113 /* 114 * Store information needed to contact our base driver 115 */ 116 uk->sc_periph = periph; 117 periph->periph_dev = &uk->sc_dev; 118 119 printf("\n"); 120 } 121 122 int 123 ukactivate(self, act) 124 struct device *self; 125 enum devact act; 126 { 127 int rv = 0; 128 129 switch (act) { 130 case DVACT_ACTIVATE: 131 rv = EOPNOTSUPP; 132 break; 133 134 case DVACT_DEACTIVATE: 135 /* 136 * Nothing to do; we key off the device's DVF_ACTIVE. 137 */ 138 break; 139 } 140 return (rv); 141 } 142 143 int 144 ukdetach(self, flags) 145 struct device *self; 146 int flags; 147 { 148 /*struct uk_softc *uk = (struct uk_softc *) self;*/ 149 int cmaj, mn; 150 151 /* locate the major number */ 152 cmaj = cdevsw_lookup_major(&uk_cdevsw); 153 154 /* Nuke the vnodes for any open instances */ 155 mn = self->dv_unit; 156 vdevgone(cmaj, mn, mn, VCHR); 157 158 return (0); 159 } 160 161 162 163 /* 164 * open the device. 165 */ 166 int 167 ukopen(dev, flag, fmt, p) 168 dev_t dev; 169 int flag, fmt; 170 struct proc *p; 171 { 172 int unit, error; 173 struct uk_softc *uk; 174 struct scsipi_periph *periph; 175 struct scsipi_adapter *adapt; 176 177 unit = UKUNIT(dev); 178 if (unit >= uk_cd.cd_ndevs) 179 return (ENXIO); 180 uk = uk_cd.cd_devs[unit]; 181 if (uk == NULL) 182 return (ENXIO); 183 184 periph = uk->sc_periph; 185 adapt = periph->periph_channel->chan_adapter; 186 187 SC_DEBUG(periph, SCSIPI_DB1, 188 ("ukopen: dev=0x%x (unit %d (of %d))\n", dev, unit, 189 uk_cd.cd_ndevs)); 190 191 /* 192 * Only allow one at a time 193 */ 194 if (periph->periph_flags & PERIPH_OPEN) { 195 printf("%s: already open\n", uk->sc_dev.dv_xname); 196 return (EBUSY); 197 } 198 199 if ((error = scsipi_adapter_addref(adapt)) != 0) 200 return (error); 201 periph->periph_flags |= PERIPH_OPEN; 202 203 SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n")); 204 return (0); 205 } 206 207 /* 208 * close the device.. only called if we are the LAST 209 * occurence of an open device 210 */ 211 int 212 ukclose(dev, flag, fmt, p) 213 dev_t dev; 214 int flag, fmt; 215 struct proc *p; 216 { 217 struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)]; 218 struct scsipi_periph *periph = uk->sc_periph; 219 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 220 221 SC_DEBUG(uk->sc_periph, SCSIPI_DB1, ("closing\n")); 222 223 scsipi_wait_drain(periph); 224 225 scsipi_adapter_delref(adapt); 226 periph->periph_flags &= ~PERIPH_OPEN; 227 228 return (0); 229 } 230 231 /* 232 * Perform special action on behalf of the user 233 * Only does generic scsi ioctls. 234 */ 235 int 236 ukioctl(dev, cmd, addr, flag, p) 237 dev_t dev; 238 u_long cmd; 239 caddr_t addr; 240 int flag; 241 struct proc *p; 242 { 243 register struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)]; 244 245 return (scsipi_do_ioctl(uk->sc_periph, dev, cmd, addr, flag, p)); 246 } 247