uk.c revision 1.58
1 /* $NetBSD: uk.c,v 1.58 2009/05/12 14:44:31 cegger 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 1.58 2009/05/12 14:44:31 cegger 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(device_t, cfdata_t, void *); 62 static void ukattach(device_t, device_t, void *); 63 static int ukactivate(device_t, enum devact); 64 static int ukdetach(device_t, 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(device_t parent, cfdata_t 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(device_t parent, device_t 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(device_t 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(device_t 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%"PRIx64" (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 } 217
Indexes created Thu Sep 25 16:09:42 GMT 2025