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(ðerswitch_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); 273