/* $OpenBSD: smbios.c,v 1.8 2022/10/29 20:35:50 kettenis Exp $ */ /* * Copyright (c) 2006 Gordon Willem Klok * Copyright (c) 2019 Mark Kettenis * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include struct smbios_entry smbios_entry; const char *smbios_uninfo[] = { "System", "Not ", "To be", "SYS-" }; char smbios_bios_date[64]; char smbios_board_vendor[64]; char smbios_board_prod[64]; char smbios_board_serial[64]; void smbios_info(char *); char *fixstring(char *); struct smbios_softc { struct device sc_dev; bus_space_tag_t sc_iot; }; int smbios_match(struct device *, void *, void *); void smbios_attach(struct device *, struct device *, void *); const struct cfattach smbios_ca = { sizeof(struct device), smbios_match, smbios_attach }; struct cfdriver smbios_cd = { NULL, "smbios", DV_DULL }; int smbios_match(struct device *parent, void *match, void *aux) { struct fdt_attach_args *faa = aux; return (strcmp(faa->fa_name, "smbios") == 0); } void smbios_attach(struct device *parent, struct device *self, void *aux) { struct smbios_softc *sc = (struct smbios_softc *)self; struct fdt_attach_args *faa = aux; struct smbios_struct_bios *sb; struct smbtable bios; char scratch[64]; char sig[5]; char *sminfop; bus_addr_t addr; bus_size_t size; bus_space_handle_t ioh; sc->sc_iot = faa->fa_iot; if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, sizeof(sig), BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE, &ioh)) { printf(": can't map SMBIOS entry point structure\n"); return; } bus_space_read_region_1(sc->sc_iot, ioh, 0, sig, sizeof(sig)); bus_space_unmap(sc->sc_iot, ioh, sizeof(sig)); if (strncmp(sig, "_SM_", 4) == 0) { struct smbhdr *hdr; uint8_t *p, checksum = 0; int i; if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, sizeof(*hdr), BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE, &ioh)) { printf(": can't map SMBIOS entry point structure\n"); return; } hdr = bus_space_vaddr(sc->sc_iot, ioh); if (hdr->len != sizeof(*hdr)) { bus_space_unmap(sc->sc_iot, ioh, sizeof(*hdr)); printf("\n"); return; } for (i = 0, p = (uint8_t *)hdr; i < hdr->len; i++) checksum += p[i]; if (checksum != 0) { bus_space_unmap(sc->sc_iot, ioh, sizeof(*hdr)); printf("\n"); return; } printf(": SMBIOS %d.%d", hdr->majrev, hdr->minrev); smbios_entry.len = hdr->size; smbios_entry.mjr = hdr->majrev; smbios_entry.min = hdr->minrev; smbios_entry.count = hdr->count; addr = hdr->addr; size = hdr->size; bus_space_unmap(sc->sc_iot, ioh, sizeof(*hdr)); } else if (strncmp(sig, "_SM3_", 5) == 0) { struct smb3hdr *hdr; uint8_t *p, checksum = 0; int i; if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, sizeof(*hdr), BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE, &ioh)) { printf(": can't map SMBIOS entry point structure\n"); return; } hdr = bus_space_vaddr(sc->sc_iot, ioh); if (hdr->len != sizeof(*hdr) || hdr->epr != 0x01) { bus_space_unmap(sc->sc_iot, ioh, sizeof(*hdr)); printf("\n"); return; } for (i = 0, p = (uint8_t *)hdr; i < hdr->len; i++) checksum += p[i]; if (checksum != 0) { bus_space_unmap(sc->sc_iot, ioh, sizeof(*hdr)); printf("\n"); return; } printf(": SMBIOS %d.%d.%d", hdr->majrev, hdr->minrev, hdr->docrev); smbios_entry.len = hdr->size; smbios_entry.mjr = hdr->majrev; smbios_entry.min = hdr->minrev; smbios_entry.count = -1; addr = hdr->addr; size = hdr->size; bus_space_unmap(sc->sc_iot, ioh, sizeof(*hdr)); } else { printf(": unsupported SMBIOS entry point\n"); return; } if (bus_space_map(sc->sc_iot, addr, size, BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE, &ioh)) { printf(": can't map SMBIOS structure table\n"); return; } smbios_entry.addr = bus_space_vaddr(sc->sc_iot, ioh); bios.cookie = 0; if (smbios_find_table(SMBIOS_TYPE_BIOS, &bios)) { sb = bios.tblhdr; printf("\n%s:", sc->sc_dev.dv_xname); if ((smbios_get_string(&bios, sb->vendor, scratch, sizeof(scratch))) != NULL) printf(" vendor %s", fixstring(scratch)); if ((smbios_get_string(&bios, sb->version, scratch, sizeof(scratch))) != NULL) printf(" version \"%s\"", fixstring(scratch)); if ((smbios_get_string(&bios, sb->release, scratch, sizeof(scratch))) != NULL) { sminfop = fixstring(scratch); if (sminfop != NULL) { strlcpy(smbios_bios_date, sminfop, sizeof(smbios_bios_date)); printf(" date %s", sminfop); } } smbios_info(sc->sc_dev.dv_xname); } bus_space_unmap(sc->sc_iot, ioh, size); printf("\n"); return; } /* * smbios_find_table() takes a caller supplied smbios struct type and * a pointer to a handle (struct smbtable) returning one if the structure * is successfully located and zero otherwise. Callers should take care * to initialize the cookie field of the smbtable structure to zero before * the first invocation of this function. * Multiple tables of the same type can be located by repeatedly calling * smbios_find_table with the same arguments. */ int smbios_find_table(uint8_t type, struct smbtable *st) { uint8_t *va, *end; struct smbtblhdr *hdr; int ret = 0, tcount = 1; va = smbios_entry.addr; end = va + smbios_entry.len; /* * The cookie field of the smtable structure is used to locate * multiple instances of a table of an arbitrary type. Following the * successful location of a table, the type is encoded as bits 0:7 of * the cookie value, the offset in terms of the number of structures * preceding that referenced by the handle is encoded in bits 15:31. */ if ((st->cookie & 0xfff) == type && st->cookie >> 16) { if ((uint8_t *)st->hdr >= va && (uint8_t *)st->hdr < end) { hdr = st->hdr; if (hdr->type == type) { va = (uint8_t *)hdr + hdr->size; for (; va + 1 < end; va++) if (*va == 0 && *(va + 1) == 0) break; va += 2; tcount = st->cookie >> 16; } } } for (; va + sizeof(struct smbtblhdr) < end && tcount <= smbios_entry.count; tcount++) { hdr = (struct smbtblhdr *)va; if (hdr->type == type) { ret = 1; st->hdr = hdr; st->tblhdr = va + sizeof(struct smbtblhdr); st->cookie = (tcount + 1) << 16 | type; break; } if (hdr->type == SMBIOS_TYPE_EOT) break; va += hdr->size; for (; va + 1 < end; va++) if (*va == 0 && *(va + 1) == 0) break; va += 2; } return ret; } char * smbios_get_string(struct smbtable *st, uint8_t indx, char *dest, size_t len) { uint8_t *va, *end; char *ret = NULL; int i; va = (uint8_t *)st->hdr + st->hdr->size; end = smbios_entry.addr + smbios_entry.len; for (i = 1; va < end && i < indx && *va; i++) while (*va++) ; if (i == indx) { if (va + len < end) { ret = dest; memcpy(ret, va, len); ret[len - 1] = '\0'; } } return ret; } char * fixstring(char *s) { char *p, *e; int i; for (i = 0; i < nitems(smbios_uninfo); i++) if ((strncasecmp(s, smbios_uninfo[i], strlen(smbios_uninfo[i]))) == 0) return NULL; /* * Remove leading and trailing whitespace */ for (p = s; *p == ' '; p++) ; /* * Special case entire string is whitespace */ if (p == s + strlen(s)) return NULL; for (e = s + strlen(s) - 1; e > s && *e == ' '; e--) ; if (p > s || e < s + strlen(s) - 1) { memmove(s, p, e - p + 1); s[e - p + 1] = '\0'; } return s; } void smbios_info(char *str) { char *sminfop, sminfo[64]; struct smbtable stbl, btbl; struct smbios_sys *sys; struct smbios_board *board; int i, infolen, uuidf, havebb; char *p; if (smbios_entry.mjr < 2) return; /* * According to the spec the system table among others is required, * if it is not we do not bother with this smbios implementation. */ stbl.cookie = btbl.cookie = 0; if (!smbios_find_table(SMBIOS_TYPE_SYSTEM, &stbl)) return; havebb = smbios_find_table(SMBIOS_TYPE_BASEBOARD, &btbl); sys = (struct smbios_sys *)stbl.tblhdr; if (havebb) { board = (struct smbios_board *)btbl.tblhdr; sminfop = NULL; if ((p = smbios_get_string(&btbl, board->vendor, sminfo, sizeof(sminfo))) != NULL) sminfop = fixstring(p); if (sminfop) strlcpy(smbios_board_vendor, sminfop, sizeof(smbios_board_vendor)); sminfop = NULL; if ((p = smbios_get_string(&btbl, board->product, sminfo, sizeof(sminfo))) != NULL) sminfop = fixstring(p); if (sminfop) strlcpy(smbios_board_prod, sminfop, sizeof(smbios_board_prod)); sminfop = NULL; if ((p = smbios_get_string(&btbl, board->serial, sminfo, sizeof(sminfo))) != NULL) sminfop = fixstring(p); if (sminfop) strlcpy(smbios_board_serial, sminfop, sizeof(smbios_board_serial)); } /* * Some smbios implementations have no system vendor or * product strings, some have very uninformative data which is * harder to work around and we must rely upon various * heuristics to detect this. In both cases we attempt to fall * back on the base board information in the perhaps naive * belief that motherboard vendors will supply this * information. */ sminfop = NULL; if ((p = smbios_get_string(&stbl, sys->vendor, sminfo, sizeof(sminfo))) != NULL) sminfop = fixstring(p); if (sminfop == NULL) { if (havebb) { if ((p = smbios_get_string(&btbl, board->vendor, sminfo, sizeof(sminfo))) != NULL) sminfop = fixstring(p); } } if (sminfop) { infolen = strlen(sminfop) + 1; hw_vendor = malloc(infolen, M_DEVBUF, M_NOWAIT); if (hw_vendor) strlcpy(hw_vendor, sminfop, infolen); sminfop = NULL; } if ((p = smbios_get_string(&stbl, sys->product, sminfo, sizeof(sminfo))) != NULL) sminfop = fixstring(p); if (sminfop == NULL) { if (havebb) { if ((p = smbios_get_string(&btbl, board->product, sminfo, sizeof(sminfo))) != NULL) sminfop = fixstring(p); } } if (sminfop) { infolen = strlen(sminfop) + 1; hw_prod = malloc(infolen, M_DEVBUF, M_NOWAIT); if (hw_prod) strlcpy(hw_prod, sminfop, infolen); sminfop = NULL; } if (hw_vendor != NULL && hw_prod != NULL) printf("\n%s: %s %s", str, hw_vendor, hw_prod); if ((p = smbios_get_string(&stbl, sys->version, sminfo, sizeof(sminfo))) != NULL) sminfop = fixstring(p); if (sminfop) { infolen = strlen(sminfop) + 1; hw_ver = malloc(infolen, M_DEVBUF, M_NOWAIT); if (hw_ver) strlcpy(hw_ver, sminfop, infolen); sminfop = NULL; } if ((p = smbios_get_string(&stbl, sys->serial, sminfo, sizeof(sminfo))) != NULL) sminfop = fixstring(p); if (sminfop) { infolen = strlen(sminfop) + 1; for (i = 0; i < infolen - 1; i++) enqueue_randomness(sminfop[i]); hw_serial = malloc(infolen, M_DEVBUF, M_NOWAIT); if (hw_serial) strlcpy(hw_serial, sminfop, infolen); } if (smbios_entry.mjr > 2 || (smbios_entry.mjr == 2 && smbios_entry.min >= 1)) { /* * If the uuid value is all 0xff the uuid is present but not * set, if its all 0 then the uuid isn't present at all. */ uuidf = SMBIOS_UUID_NPRESENT|SMBIOS_UUID_NSET; for (i = 0; i < sizeof(sys->uuid); i++) { if (sys->uuid[i] != 0xff) uuidf &= ~SMBIOS_UUID_NSET; if (sys->uuid[i] != 0) uuidf &= ~SMBIOS_UUID_NPRESENT; } if (uuidf & SMBIOS_UUID_NPRESENT) hw_uuid = NULL; else if (uuidf & SMBIOS_UUID_NSET) hw_uuid = "Not Set"; else { for (i = 0; i < sizeof(sys->uuid); i++) enqueue_randomness(sys->uuid[i]); hw_uuid = malloc(SMBIOS_UUID_REPLEN, M_DEVBUF, M_NOWAIT); if (hw_uuid) { snprintf(hw_uuid, SMBIOS_UUID_REPLEN, SMBIOS_UUID_REP, sys->uuid[0], sys->uuid[1], sys->uuid[2], sys->uuid[3], sys->uuid[4], sys->uuid[5], sys->uuid[6], sys->uuid[7], sys->uuid[8], sys->uuid[9], sys->uuid[10], sys->uuid[11], sys->uuid[12], sys->uuid[13], sys->uuid[14], sys->uuid[15]); } } } }