| 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 | |