sys/dev/etherswitch/etherswitch.c

   1 /*-
   2  * Copyright (c) 2011-2012 Stefan Bethke.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD$
  27  */
  28
  29 #include <sys/param.h>
  30 #include <sys/bus.h>
  31 #include <sys/conf.h>
  32 #include <sys/fcntl.h>
  33 #include <sys/lock.h>
  34 #include <sys/kernel.h>
  35 #include <sys/malloc.h>
  36 #include <sys/module.h>
  37 #include <sys/socket.h>
  38 #include <sys/sx.h>
  39 #include <sys/systm.h>
  40 #include <sys/uio.h>
  41
  42 #include <net/if.h>
  43
  44 #include <dev/etherswitch/etherswitch.h>
  45
  46 #include "etherswitch_if.h"
  47
  48 #define BUFSIZE 1024
  49
  50 struct etherswitch_softc {
  51         device_t sc_dev;
  52         int sc_count;
  53
  54         struct cdev *sc_devnode;
  55         struct sx sc_lock;
  56 };
  57
  58 #define SWITCH_LOCK(sc)                 sx_xlock(&(sc)->sc_lock)
  59 #define SWITCH_UNLOCK(sc)                       sx_xunlock(&(sc)->sc_lock)
  60
  61 static int etherswitch_probe(device_t);
  62 static int etherswitch_attach(device_t);
  63 static int etherswitch_detach(device_t);
  64 static void etherswitch_identify(driver_t *driver, device_t parent);
  65
  66 devclass_t etherswitch_devclass;
  67
  68 static device_method_t etherswitch_methods[] = {
  69         /* device interface */
  70         DEVMETHOD(device_identify,      etherswitch_identify),
  71         DEVMETHOD(device_probe,         etherswitch_probe),
  72         DEVMETHOD(device_attach,        etherswitch_attach),
  73         DEVMETHOD(device_detach,        etherswitch_detach),
  74
  75         { 0, 0 }
  76 };
  77
  78 driver_t etherswitch_driver = {
  79         "etherswitch",
  80         etherswitch_methods,
  81         sizeof(struct etherswitch_softc),
  82 };
  83
  84 static  d_open_t        etherswitchopen;
  85 static  d_close_t       etherswitchclose;
  86 static  d_write_t       etherswitchwrite;
  87 static  d_read_t        etherswitchread;
  88 static  d_ioctl_t       etherswitchioctl;
  89
  90 static struct cdevsw etherswitch_cdevsw = {
  91         .d_version =    D_VERSION,
  92         .d_flags =      D_TRACKCLOSE,
  93         .d_open =       etherswitchopen,
  94         .d_close =      etherswitchclose,
  95         .d_read =       etherswitchread,
  96         .d_write =      etherswitchwrite,
  97         .d_ioctl =      etherswitchioctl,
  98         .d_name =       "etherswitch",
  99 };
 100
 101 static void
 102 etherswitch_identify(driver_t *driver, device_t parent)
 103 {
 104         if (device_find_child(parent, "etherswitch", -1) == NULL)
 105                 BUS_ADD_CHILD(parent, 0, "etherswitch", -1);
 106 }
 107
 108 static int
 109 etherswitch_probe(device_t dev)
 110 {
 111         device_set_desc(dev, "Switch controller");
 112
 113         return (0);
 114 }
 115
 116 static int
 117 etherswitch_attach(device_t dev)
 118 {
 119         struct etherswitch_softc *sc = (struct etherswitch_softc *)device_get_softc(dev);
 120
 121         sc->sc_dev = dev;
 122         sx_init(&sc->sc_lock, "etherswitch");
 123         sc->sc_devnode = make_dev(&etherswitch_cdevsw, device_get_unit(dev),
 124                         UID_ROOT, GID_WHEEL,
 125                         0600, "etherswitch%d", device_get_unit(dev));
 126         if (sc->sc_devnode == NULL) {
 127                 device_printf(dev, "failed to create character device\n");
 128                 sx_destroy(&sc->sc_lock);
 129                 return (ENXIO);
 130         }
 131         sc->sc_devnode->si_drv1 = sc;
 132
 133         return (0);
 134 }
 135
 136 static int
 137 etherswitch_detach(device_t dev)
 138 {
 139         struct etherswitch_softc *sc = (struct etherswitch_softc *)device_get_softc(dev);
 140
 141         if (sc->sc_devnode)
 142                 destroy_dev(sc->sc_devnode);
 143         sx_destroy(&sc->sc_lock);
 144
 145         return (0);
 146 }
 147
 148 static int
 149 etherswitchopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 150 {
 151         struct etherswitch_softc *sc = dev->si_drv1;
 152
 153         SWITCH_LOCK(sc);
 154         if (sc->sc_count > 0) {
 155                 SWITCH_UNLOCK(sc);
 156                 return (EBUSY);
 157         }
 158
 159         sc->sc_count++;
 160         SWITCH_UNLOCK(sc);
 161
 162         return (0);
 163 }
 164
 165 static int
 166 etherswitchclose(struct cdev *dev, int flags, int fmt, struct thread *td)
 167 {
 168         struct etherswitch_softc *sc = dev->si_drv1;
 169
 170         SWITCH_LOCK(sc);
 171         if (sc->sc_count == 0) {
 172                 SWITCH_UNLOCK(sc);
 173                 return (EINVAL);
 174         }
 175
 176         sc->sc_count--;
 177
 178         if (sc->sc_count < 0)
 179                 panic("%s: etherswitch_count < 0!", __func__);
 180         SWITCH_UNLOCK(sc);
 181
 182         return (0);
 183 }
 184
 185 static int
 186 etherswitchwrite(struct cdev *dev, struct uio * uio, int ioflag)
 187 {
 188         return (EINVAL);
 189 }
 190
 191 static int
 192 etherswitchread(struct cdev *dev, struct uio * uio, int ioflag)
 193 {
 194         return (EINVAL);
 195 }
 196
 197 static int
 198 etherswitchioctl(struct cdev *cdev, u_long cmd, caddr_t data, int flags, struct thread *td)
 199 {
 200         struct etherswitch_softc *sc = cdev->si_drv1;
 201         device_t dev = sc->sc_dev;
 202         device_t etherswitch = device_get_parent(dev);
 203         etherswitch_conf_t conf;
 204         etherswitch_info_t *info;
 205         etherswitch_reg_t *reg;
 206         etherswitch_phyreg_t *phyreg;
 207         int error = 0;
 208
 209         switch (cmd) {
 210         case IOETHERSWITCHGETINFO:
 211                 info = ETHERSWITCH_GETINFO(etherswitch);
 212                 bcopy(info, data, sizeof(etherswitch_info_t));
 213                 break;
 214
 215         case IOETHERSWITCHGETREG:
 216                 reg = (etherswitch_reg_t *)data;
 217                 ETHERSWITCH_LOCK(etherswitch);
 218                 reg->val = ETHERSWITCH_READREG(etherswitch, reg->reg);
 219                 ETHERSWITCH_UNLOCK(etherswitch);
 220                 break;
 221
 222         case IOETHERSWITCHSETREG:
 223                 reg = (etherswitch_reg_t *)data;
 224                 ETHERSWITCH_LOCK(etherswitch);
 225                 error = ETHERSWITCH_WRITEREG(etherswitch, reg->reg, reg->val);
 226                 ETHERSWITCH_UNLOCK(etherswitch);
 227                 break;
 228
 229         case IOETHERSWITCHGETPORT:
 230                 error = ETHERSWITCH_GETPORT(etherswitch, (etherswitch_port_t *)data);
 231                 break;
 232
 233         case IOETHERSWITCHSETPORT:
 234                 error = ETHERSWITCH_SETPORT(etherswitch, (etherswitch_port_t *)data);
 235                 break;
 236
 237         case IOETHERSWITCHGETVLANGROUP:
 238                 error = ETHERSWITCH_GETVGROUP(etherswitch, (etherswitch_vlangroup_t *)data);
 239                 break;
 240
 241         case IOETHERSWITCHSETVLANGROUP:
 242                 error = ETHERSWITCH_SETVGROUP(etherswitch, (etherswitch_vlangroup_t *)data);
 243                 break;
 244
 245         case IOETHERSWITCHGETPHYREG:
 246                 phyreg = (etherswitch_phyreg_t *)data;
 247                 phyreg->val = ETHERSWITCH_READPHYREG(etherswitch, phyreg->phy, phyreg->reg);
 248                 break;
 249
 250         case IOETHERSWITCHSETPHYREG:
 251                 phyreg = (etherswitch_phyreg_t *)data;
 252                 error = ETHERSWITCH_WRITEPHYREG(etherswitch, phyreg->phy, phyreg->reg, phyreg->val);
 253                 break;
 254
 255         case IOETHERSWITCHGETCONF:
 256                 bzero(&conf, sizeof(etherswitch_conf_t));
 257                 error = ETHERSWITCH_GETCONF(etherswitch, &conf);
 258                 bcopy(&conf, data, sizeof(etherswitch_conf_t));
 259                 break;
 260
 261         case IOETHERSWITCHSETCONF:
 262                 error = ETHERSWITCH_SETCONF(etherswitch, (etherswitch_conf_t *)data);
 263                 break;
 264
 265         default:
 266                 error = ENOTTY;
 267         }
 268
 269         return (error);
 270 }
 271
 272 MODULE_VERSION(etherswitch, 1);