uk.c revision 1.53.4.4
1 /* $NetBSD: uk.c,v 1.53.4.4 2010/03/11 15:04:03 yamt 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 1.53.4.4 2010/03/11 15:04:03 yamt 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 ukdetach(device_t, int); 64 65 66 CFATTACH_DECL(uk, sizeof(struct uk_softc), ukmatch, ukattach, ukdetach, NULL); 67 68 extern struct cfdriver uk_cd; 69 70 static dev_type_open(ukopen); 71 static dev_type_close(ukclose); 72 static dev_type_ioctl(ukioctl); 73 74 const struct cdevsw uk_cdevsw = { 75 ukopen, ukclose, noread, nowrite, ukioctl, 76 nostop, notty, nopoll, nommap, nokqfilter, D_OTHER, 77 }; 78 79 static int 80 ukmatch(device_t parent, cfdata_t match, 81 void *aux) 82 { 83 84 return (1); 85 } 86 87 /* 88 * The routine called by the low level scsi routine when it discovers 89 * a device suitable for this driver. 90 */ 91 static void 92 ukattach(device_t parent, device_t self, void *aux) 93 { 94 struct uk_softc *uk = device_private(self); 95 struct scsipibus_attach_args *sa = aux; 96 struct scsipi_periph *periph = sa->sa_periph; 97 98 SC_DEBUG(periph, SCSIPI_DB2, ("ukattach: ")); 99 100 /* 101 * Store information needed to contact our base driver 102 */ 103 uk->sc_periph = periph; 104 periph->periph_dev = &uk->sc_dev; 105 106 printf("\n"); 107 } 108 109 static int 110 ukdetach(device_t self, int flags) 111 { 112 /*struct uk_softc *uk = device_private(self);*/ 113 int cmaj, mn; 114 115 /* locate the major number */ 116 cmaj = cdevsw_lookup_major(&uk_cdevsw); 117 118 /* Nuke the vnodes for any open instances */ 119 mn = device_unit(self); 120 vdevgone(cmaj, mn, mn, VCHR); 121 122 return (0); 123 } 124 125 /* 126 * open the device. 127 */ 128 static int 129 ukopen(dev_t dev, int flag, int fmt, struct lwp *l) 130 { 131 int unit, error; 132 struct uk_softc *uk; 133 struct scsipi_periph *periph; 134 struct scsipi_adapter *adapt; 135 136 unit = UKUNIT(dev); 137 uk = device_lookup_private(&uk_cd, unit); 138 if (uk == NULL) 139 return (ENXIO); 140 141 periph = uk->sc_periph; 142 adapt = periph->periph_channel->chan_adapter; 143 144 SC_DEBUG(periph, SCSIPI_DB1, 145 ("ukopen: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, unit, 146 uk_cd.cd_ndevs)); 147 148 /* 149 * Only allow one at a time 150 */ 151 if (periph->periph_flags & PERIPH_OPEN) { 152 aprint_error_dev(&uk->sc_dev, "already open\n"); 153 return (EBUSY); 154 } 155 156 if ((error = scsipi_adapter_addref(adapt)) != 0) 157 return (error); 158 periph->periph_flags |= PERIPH_OPEN; 159 160 SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n")); 161 return (0); 162 } 163 164 /* 165 * close the device.. only called if we are the LAST 166 * occurence of an open device 167 */ 168 static int 169 ukclose(dev_t dev, int flag, int fmt, struct lwp *l) 170 { 171 struct uk_softc *uk = device_lookup_private(&uk_cd, UKUNIT(dev)); 172 struct scsipi_periph *periph = uk->sc_periph; 173 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 174 175 SC_DEBUG(uk->sc_periph, SCSIPI_DB1, ("closing\n")); 176 177 scsipi_wait_drain(periph); 178 179 scsipi_adapter_delref(adapt); 180 periph->periph_flags &= ~PERIPH_OPEN; 181 182 return (0); 183 } 184 185 /* 186 * Perform special action on behalf of the user 187 * Only does generic scsi ioctls. 188 */ 189 static int 190 ukioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 191 { 192 struct uk_softc *uk = device_lookup_private(&uk_cd, UKUNIT(dev)); 193 194 return (scsipi_do_ioctl(uk->sc_periph, dev, cmd, addr, flag, l)); 195 } 196
Indexes created Thu Oct 02 14:10:14 GMT 2025