1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 /* 33 * VPD decoder for IBM systems (Thinkpads) 34 * http://www-1.ibm.com/support/docview.wss?uid=psg1MIGR-45120 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/socket.h> 41 #include <sys/sysctl.h> 42 43 #include <sys/module.h> 44 #include <sys/bus.h> 45 46 #include <machine/bus.h> 47 #include <machine/resource.h> 48 #include <sys/rman.h> 49 50 #include <vm/vm.h> 51 #include <vm/vm_param.h> 52 #include <vm/pmap.h> 53 #include <machine/md_var.h> 54 #include <machine/pc/bios.h> 55 56 /* 57 * Vital Product Data 58 */ 59 struct vpd { 60 u_int16_t Header; /* 0x55AA */ 61 u_int8_t Signature[3]; /* Always 'VPD' */ 62 u_int8_t Length; /* Sructure Length */ 63 64 u_int8_t Reserved[7]; /* Reserved */ 65 66 u_int8_t BuildID[9]; /* BIOS Build ID */ 67 u_int8_t BoxSerial[7]; /* Box Serial Number */ 68 u_int8_t PlanarSerial[11]; /* Motherboard Serial Number */ 69 u_int8_t MachType[7]; /* Machine Type/Model */ 70 u_int8_t Checksum; /* Checksum */ 71 } __packed; 72 73 struct vpd_softc { 74 device_t dev; 75 struct resource * res; 76 int rid; 77 78 struct vpd * vpd; 79 80 struct sysctl_ctx_list ctx; 81 82 char BuildID[10]; 83 char BoxSerial[8]; 84 char PlanarSerial[12]; 85 char MachineType[5]; 86 char MachineModel[4]; 87 }; 88 89 #define VPD_START 0xf0000 90 #define VPD_STEP 0x10 91 #define VPD_OFF 2 92 #define VPD_LEN 3 93 #define VPD_SIG "VPD" 94 95 #define RES2VPD(res) ((struct vpd *)rman_get_virtual(res)) 96 #define ADDR2VPD(addr) ((struct vpd *)BIOS_PADDRTOVADDR(addr)) 97 98 static void vpd_identify (driver_t *, device_t); 99 static int vpd_probe (device_t); 100 static int vpd_attach (device_t); 101 static int vpd_detach (device_t); 102 static int vpd_modevent (module_t, int, void *); 103 104 static int vpd_cksum (struct vpd *); 105 106 static SYSCTL_NODE(_hw, OID_AUTO, vpd, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 107 NULL); 108 static SYSCTL_NODE(_hw_vpd, OID_AUTO, machine, 109 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 110 NULL); 111 static SYSCTL_NODE(_hw_vpd_machine, OID_AUTO, type, 112 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 113 NULL); 114 static SYSCTL_NODE(_hw_vpd_machine, OID_AUTO, model, 115 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 116 NULL); 117 static SYSCTL_NODE(_hw_vpd, OID_AUTO, build_id, 118 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 119 NULL); 120 static SYSCTL_NODE(_hw_vpd, OID_AUTO, serial, 121 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 122 NULL); 123 static SYSCTL_NODE(_hw_vpd_serial, OID_AUTO, box, 124 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 125 NULL); 126 static SYSCTL_NODE(_hw_vpd_serial, OID_AUTO, planar, 127 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 128 NULL); 129 130 static void 131 vpd_identify (driver_t *driver, device_t parent) 132 { 133 device_t child; 134 u_int32_t addr; 135 int length; 136 int rid; 137 138 if (!device_is_alive(parent)) 139 return; 140 141 addr = bios_sigsearch(VPD_START, VPD_SIG, VPD_LEN, VPD_STEP, VPD_OFF); 142 if (addr != 0) { 143 rid = 0; 144 length = ADDR2VPD(addr)->Length; 145 146 child = BUS_ADD_CHILD(parent, 5, "vpd", -1); 147 device_set_driver(child, driver); 148 bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length); 149 device_set_desc(child, "Vital Product Data Area"); 150 } 151 152 return; 153 } 154 155 static int 156 vpd_probe (device_t dev) 157 { 158 struct resource *res; 159 int rid; 160 int error; 161 162 error = 0; 163 rid = 0; 164 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 165 if (res == NULL) { 166 device_printf(dev, "Unable to allocate memory resource.\n"); 167 error = ENOMEM; 168 goto bad; 169 } 170 171 if (vpd_cksum(RES2VPD(res))) 172 device_printf(dev, "VPD checksum failed. BIOS update may be required.\n"); 173 174 bad: 175 if (res) 176 bus_release_resource(dev, SYS_RES_MEMORY, rid, res); 177 return (error); 178 } 179 180 static int 181 vpd_attach (device_t dev) 182 { 183 struct vpd_softc *sc; 184 char unit[4]; 185 int error; 186 187 sc = device_get_softc(dev); 188 error = 0; 189 190 sc->dev = dev; 191 sc->rid = 0; 192 sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid, 193 RF_ACTIVE); 194 if (sc->res == NULL) { 195 device_printf(dev, "Unable to allocate memory resource.\n"); 196 error = ENOMEM; 197 goto bad; 198 } 199 sc->vpd = RES2VPD(sc->res); 200 201 snprintf(unit, sizeof(unit), "%d", device_get_unit(sc->dev)); 202 snprintf(sc->MachineType, 5, "%.4s", sc->vpd->MachType); 203 snprintf(sc->MachineModel, 4, "%.3s", sc->vpd->MachType+4); 204 snprintf(sc->BuildID, 10, "%.9s", sc->vpd->BuildID); 205 snprintf(sc->BoxSerial, 8, "%.7s", sc->vpd->BoxSerial); 206 snprintf(sc->PlanarSerial, 12, "%.11s", sc->vpd->PlanarSerial); 207 208 sysctl_ctx_init(&sc->ctx); 209 SYSCTL_ADD_STRING(&sc->ctx, 210 SYSCTL_STATIC_CHILDREN(_hw_vpd_machine_type), OID_AUTO, 211 unit, CTLFLAG_RD, sc->MachineType, 0, NULL); 212 SYSCTL_ADD_STRING(&sc->ctx, 213 SYSCTL_STATIC_CHILDREN(_hw_vpd_machine_model), OID_AUTO, 214 unit, CTLFLAG_RD, sc->MachineModel, 0, NULL); 215 SYSCTL_ADD_STRING(&sc->ctx, 216 SYSCTL_STATIC_CHILDREN(_hw_vpd_build_id), OID_AUTO, 217 unit, CTLFLAG_RD, sc->BuildID, 0, NULL); 218 SYSCTL_ADD_STRING(&sc->ctx, 219 SYSCTL_STATIC_CHILDREN(_hw_vpd_serial_box), OID_AUTO, 220 unit, CTLFLAG_RD, sc->BoxSerial, 0, NULL); 221 SYSCTL_ADD_STRING(&sc->ctx, 222 SYSCTL_STATIC_CHILDREN(_hw_vpd_serial_planar), OID_AUTO, 223 unit, CTLFLAG_RD, sc->PlanarSerial, 0, NULL); 224 225 device_printf(dev, "Machine Type: %.4s, Model: %.3s, Build ID: %.9s\n", 226 sc->MachineType, sc->MachineModel, sc->BuildID); 227 device_printf(dev, "Box Serial: %.7s, Planar Serial: %.11s\n", 228 sc->BoxSerial, sc->PlanarSerial); 229 230 return (0); 231 bad: 232 if (sc->res) 233 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res); 234 return (error); 235 } 236 237 static int 238 vpd_detach (device_t dev) 239 { 240 struct vpd_softc *sc; 241 242 sc = device_get_softc(dev); 243 244 if (sc->res) 245 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res); 246 247 sysctl_ctx_free(&sc->ctx); 248 249 return (0); 250 } 251 252 static int 253 vpd_modevent (module_t mod, int what, void *arg) 254 { 255 device_t * devs; 256 int count; 257 int i; 258 259 switch (what) { 260 case MOD_LOAD: 261 break; 262 case MOD_UNLOAD: 263 devclass_get_devices(devclass_find("vpd"), &devs, &count); 264 for (i = 0; i < count; i++) { 265 device_delete_child(device_get_parent(devs[i]), devs[i]); 266 } 267 break; 268 default: 269 break; 270 } 271 272 return (0); 273 } 274 275 static device_method_t vpd_methods[] = { 276 /* Device interface */ 277 DEVMETHOD(device_identify, vpd_identify), 278 DEVMETHOD(device_probe, vpd_probe), 279 DEVMETHOD(device_attach, vpd_attach), 280 DEVMETHOD(device_detach, vpd_detach), 281 { 0, 0 } 282 }; 283 284 static driver_t vpd_driver = { 285 "vpd", 286 vpd_methods, 287 sizeof(struct vpd_softc), 288 }; 289 290 DRIVER_MODULE(vpd, nexus, vpd_driver, vpd_modevent, 0); 291 MODULE_VERSION(vpd, 1); 292 293 /* 294 * Perform a checksum over the VPD structure, starting with 295 * the BuildID. (Jean Delvare <khali@linux-fr.org>) 296 */ 297 static int 298 vpd_cksum (struct vpd *v) 299 { 300 u_int8_t *ptr; 301 u_int8_t cksum; 302 int i; 303 304 ptr = (u_int8_t *)v; 305 cksum = 0; 306 for (i = offsetof(struct vpd, BuildID); i < v->Length ; i++) 307 cksum += ptr[i]; 308 return (cksum); 309 } 310