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 devclass_t vpd_devclass; 99 100 static void vpd_identify (driver_t *, device_t); 101 static int vpd_probe (device_t); 102 static int vpd_attach (device_t); 103 static int vpd_detach (device_t); 104 static int vpd_modevent (module_t, int, void *); 105 106 static int vpd_cksum (struct vpd *); 107 108 static SYSCTL_NODE(_hw, OID_AUTO, vpd, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 109 NULL); 110 static SYSCTL_NODE(_hw_vpd, OID_AUTO, machine, 111 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 112 NULL); 113 static SYSCTL_NODE(_hw_vpd_machine, OID_AUTO, type, 114 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 115 NULL); 116 static SYSCTL_NODE(_hw_vpd_machine, OID_AUTO, model, 117 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 118 NULL); 119 static SYSCTL_NODE(_hw_vpd, OID_AUTO, build_id, 120 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 121 NULL); 122 static SYSCTL_NODE(_hw_vpd, OID_AUTO, serial, 123 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 124 NULL); 125 static SYSCTL_NODE(_hw_vpd_serial, OID_AUTO, box, 126 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 127 NULL); 128 static SYSCTL_NODE(_hw_vpd_serial, OID_AUTO, planar, 129 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 130 NULL); 131 132 static void 133 vpd_identify (driver_t *driver, device_t parent) 134 { 135 device_t child; 136 u_int32_t addr; 137 int length; 138 int rid; 139 140 if (!device_is_alive(parent)) 141 return; 142 143 addr = bios_sigsearch(VPD_START, VPD_SIG, VPD_LEN, VPD_STEP, VPD_OFF); 144 if (addr != 0) { 145 rid = 0; 146 length = ADDR2VPD(addr)->Length; 147 148 child = BUS_ADD_CHILD(parent, 5, "vpd", -1); 149 device_set_driver(child, driver); 150 bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length); 151 device_set_desc(child, "Vital Product Data Area"); 152 } 153 154 return; 155 } 156 157 static int 158 vpd_probe (device_t dev) 159 { 160 struct resource *res; 161 int rid; 162 int error; 163 164 error = 0; 165 rid = 0; 166 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 167 if (res == NULL) { 168 device_printf(dev, "Unable to allocate memory resource.\n"); 169 error = ENOMEM; 170 goto bad; 171 } 172 173 if (vpd_cksum(RES2VPD(res))) 174 device_printf(dev, "VPD checksum failed. BIOS update may be required.\n"); 175 176 bad: 177 if (res) 178 bus_release_resource(dev, SYS_RES_MEMORY, rid, res); 179 return (error); 180 } 181 182 static int 183 vpd_attach (device_t dev) 184 { 185 struct vpd_softc *sc; 186 char unit[4]; 187 int error; 188 189 sc = device_get_softc(dev); 190 error = 0; 191 192 sc->dev = dev; 193 sc->rid = 0; 194 sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid, 195 RF_ACTIVE); 196 if (sc->res == NULL) { 197 device_printf(dev, "Unable to allocate memory resource.\n"); 198 error = ENOMEM; 199 goto bad; 200 } 201 sc->vpd = RES2VPD(sc->res); 202 203 snprintf(unit, sizeof(unit), "%d", device_get_unit(sc->dev)); 204 snprintf(sc->MachineType, 5, "%.4s", sc->vpd->MachType); 205 snprintf(sc->MachineModel, 4, "%.3s", sc->vpd->MachType+4); 206 snprintf(sc->BuildID, 10, "%.9s", sc->vpd->BuildID); 207 snprintf(sc->BoxSerial, 8, "%.7s", sc->vpd->BoxSerial); 208 snprintf(sc->PlanarSerial, 12, "%.11s", sc->vpd->PlanarSerial); 209 210 sysctl_ctx_init(&sc->ctx); 211 SYSCTL_ADD_STRING(&sc->ctx, 212 SYSCTL_STATIC_CHILDREN(_hw_vpd_machine_type), OID_AUTO, 213 unit, CTLFLAG_RD|CTLFLAG_DYN, sc->MachineType, 0, NULL); 214 SYSCTL_ADD_STRING(&sc->ctx, 215 SYSCTL_STATIC_CHILDREN(_hw_vpd_machine_model), OID_AUTO, 216 unit, CTLFLAG_RD|CTLFLAG_DYN, sc->MachineModel, 0, NULL); 217 SYSCTL_ADD_STRING(&sc->ctx, 218 SYSCTL_STATIC_CHILDREN(_hw_vpd_build_id), OID_AUTO, 219 unit, CTLFLAG_RD|CTLFLAG_DYN, sc->BuildID, 0, NULL); 220 SYSCTL_ADD_STRING(&sc->ctx, 221 SYSCTL_STATIC_CHILDREN(_hw_vpd_serial_box), OID_AUTO, 222 unit, CTLFLAG_RD|CTLFLAG_DYN, sc->BoxSerial, 0, NULL); 223 SYSCTL_ADD_STRING(&sc->ctx, 224 SYSCTL_STATIC_CHILDREN(_hw_vpd_serial_planar), OID_AUTO, 225 unit, CTLFLAG_RD|CTLFLAG_DYN, sc->PlanarSerial, 0, NULL); 226 227 device_printf(dev, "Machine Type: %.4s, Model: %.3s, Build ID: %.9s\n", 228 sc->MachineType, sc->MachineModel, sc->BuildID); 229 device_printf(dev, "Box Serial: %.7s, Planar Serial: %.11s\n", 230 sc->BoxSerial, sc->PlanarSerial); 231 232 return (0); 233 bad: 234 if (sc->res) 235 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res); 236 return (error); 237 } 238 239 static int 240 vpd_detach (device_t dev) 241 { 242 struct vpd_softc *sc; 243 244 sc = device_get_softc(dev); 245 246 if (sc->res) 247 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res); 248 249 sysctl_ctx_free(&sc->ctx); 250 251 return (0); 252 } 253 254 static int 255 vpd_modevent (mod, what, arg) 256 module_t mod; 257 int what; 258 void * arg; 259 { 260 device_t * devs; 261 int count; 262 int i; 263 264 switch (what) { 265 case MOD_LOAD: 266 break; 267 case MOD_UNLOAD: 268 devclass_get_devices(vpd_devclass, &devs, &count); 269 for (i = 0; i < count; i++) { 270 device_delete_child(device_get_parent(devs[i]), devs[i]); 271 } 272 break; 273 default: 274 break; 275 } 276 277 return (0); 278 } 279 280 static device_method_t vpd_methods[] = { 281 /* Device interface */ 282 DEVMETHOD(device_identify, vpd_identify), 283 DEVMETHOD(device_probe, vpd_probe), 284 DEVMETHOD(device_attach, vpd_attach), 285 DEVMETHOD(device_detach, vpd_detach), 286 { 0, 0 } 287 }; 288 289 static driver_t vpd_driver = { 290 "vpd", 291 vpd_methods, 292 sizeof(struct vpd_softc), 293 }; 294 295 DRIVER_MODULE(vpd, nexus, vpd_driver, vpd_devclass, vpd_modevent, 0); 296 MODULE_VERSION(vpd, 1); 297 298 /* 299 * Perform a checksum over the VPD structure, starting with 300 * the BuildID. (Jean Delvare <khali@linux-fr.org>) 301 */ 302 static int 303 vpd_cksum (struct vpd *v) 304 { 305 u_int8_t *ptr; 306 u_int8_t cksum; 307 int i; 308 309 ptr = (u_int8_t *)v; 310 cksum = 0; 311 for (i = offsetof(struct vpd, BuildID); i < v->Length ; i++) 312 cksum += ptr[i]; 313 return (cksum); 314 } 315