324 lines
7.4 KiB
C
324 lines
7.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/socket.h>
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#include <sys/efi.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <machine/md_var.h>
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#if defined(__amd64__) || defined(__i386__)
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#include <machine/pc/bios.h>
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#endif
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#include <dev/smbios/smbios.h>
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/*
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* System Management BIOS Reference Specification, v2.4 Final
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* http://www.dmtf.org/standards/published_documents/DSP0134.pdf
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*/
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struct smbios_softc {
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device_t dev;
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union {
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struct smbios_eps * eps;
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struct smbios3_eps * eps3;
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};
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bool is_eps3;
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};
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static void smbios_identify (driver_t *, device_t);
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static int smbios_probe (device_t);
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static int smbios_attach (device_t);
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static int smbios_detach (device_t);
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static int smbios_modevent (module_t, int, void *);
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static int smbios_cksum (void *);
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static bool smbios_eps3 (void *);
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static void
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smbios_identify (driver_t *driver, device_t parent)
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{
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#ifdef ARCH_MAY_USE_EFI
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struct uuid efi_smbios = EFI_TABLE_SMBIOS;
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struct uuid efi_smbios3 = EFI_TABLE_SMBIOS3;
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void *addr_efi;
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#endif
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struct smbios_eps *eps;
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struct smbios3_eps *eps3;
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void *ptr;
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device_t child;
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vm_paddr_t addr = 0;
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size_t map_size = sizeof (*eps);
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int length;
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if (!device_is_alive(parent))
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return;
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#ifdef ARCH_MAY_USE_EFI
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if (!efi_get_table(&efi_smbios3, &addr_efi)) {
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addr = (vm_paddr_t)addr_efi;
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map_size = sizeof (*eps3);
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} else if (!efi_get_table(&efi_smbios, &addr_efi)) {
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addr = (vm_paddr_t)addr_efi;
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}
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#endif
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#if defined(__amd64__) || defined(__i386__)
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if (addr == 0)
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addr = bios_sigsearch(SMBIOS_START, SMBIOS_SIG, SMBIOS_LEN,
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SMBIOS_STEP, SMBIOS_OFF);
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#endif
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if (addr != 0) {
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ptr = pmap_mapbios(addr, map_size);
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if (ptr == NULL)
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return;
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if (map_size == sizeof (*eps3)) {
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eps3 = ptr;
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length = eps3->length;
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if (memcmp(eps3->anchor_string,
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SMBIOS3_SIG, SMBIOS3_LEN) != 0) {
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printf("smbios3: corrupt sig %s found\n",
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eps3->anchor_string);
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return;
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}
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} else {
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eps = ptr;
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length = eps->length;
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if (memcmp(eps->anchor_string,
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SMBIOS_SIG, SMBIOS_LEN) != 0) {
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printf("smbios: corrupt sig %s found\n",
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eps->anchor_string);
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return;
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}
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}
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if (length != map_size) {
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u_int8_t major, minor;
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major = eps->major_version;
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minor = eps->minor_version;
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/* SMBIOS v2.1 implementation might use 0x1e. */
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if (length == 0x1e && major == 2 && minor == 1) {
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length = 0x1f;
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} else {
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pmap_unmapbios(eps, map_size);
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return;
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}
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}
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child = BUS_ADD_CHILD(parent, 5, "smbios", -1);
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device_set_driver(child, driver);
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/* smuggle the phys addr into probe and attach */
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bus_set_resource(child, SYS_RES_MEMORY, 0, addr, length);
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device_set_desc(child, "System Management BIOS");
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pmap_unmapbios(ptr, map_size);
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}
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return;
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}
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static int
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smbios_probe (device_t dev)
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{
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vm_paddr_t pa;
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vm_size_t size;
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void *va;
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int error;
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error = 0;
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pa = bus_get_resource_start(dev, SYS_RES_MEMORY, 0);
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size = bus_get_resource_count(dev, SYS_RES_MEMORY, 0);
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va = pmap_mapbios(pa, size);
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if (va == NULL) {
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device_printf(dev, "Unable to map memory.\n");
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return (ENOMEM);
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}
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if (smbios_cksum(va)) {
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device_printf(dev, "SMBIOS checksum failed.\n");
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error = ENXIO;
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}
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pmap_unmapbios(va, size);
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return (error);
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}
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static int
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smbios_attach (device_t dev)
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{
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struct smbios_softc *sc;
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void *va;
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vm_paddr_t pa;
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vm_size_t size;
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sc = device_get_softc(dev);
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sc->dev = dev;
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pa = bus_get_resource_start(dev, SYS_RES_MEMORY, 0);
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size = bus_get_resource_count(dev, SYS_RES_MEMORY, 0);
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va = pmap_mapbios(pa, size);
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if (va == NULL) {
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device_printf(dev, "Unable to map memory.\n");
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return (ENOMEM);
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}
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sc->is_eps3 = smbios_eps3(va);
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if (sc->is_eps3) {
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sc->eps3 = va;
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device_printf(dev, "Version: %u.%u",
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sc->eps3->major_version, sc->eps3->minor_version);
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} else {
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sc->eps = va;
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device_printf(dev, "Version: %u.%u",
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sc->eps->major_version, sc->eps->minor_version);
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if (bcd2bin(sc->eps->BCD_revision))
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printf(", BCD Revision: %u.%u",
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bcd2bin(sc->eps->BCD_revision >> 4),
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bcd2bin(sc->eps->BCD_revision & 0x0f));
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}
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printf("\n");
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return (0);
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}
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static int
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smbios_detach (device_t dev)
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{
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struct smbios_softc *sc;
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vm_size_t size;
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void *va;
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sc = device_get_softc(dev);
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va = (sc->is_eps3 ? (void *)sc->eps3 : (void *)sc->eps);
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if (sc->is_eps3)
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va = sc->eps3;
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else
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va = sc->eps;
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size = bus_get_resource_count(dev, SYS_RES_MEMORY, 0);
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if (va != NULL)
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pmap_unmapbios(va, size);
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return (0);
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}
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static int
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smbios_modevent (module_t mod, int what, void *arg)
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{
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device_t * devs;
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int count;
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int i;
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switch (what) {
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case MOD_LOAD:
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break;
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case MOD_UNLOAD:
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devclass_get_devices(devclass_find("smbios"), &devs, &count);
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for (i = 0; i < count; i++) {
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device_delete_child(device_get_parent(devs[i]), devs[i]);
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}
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free(devs, M_TEMP);
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break;
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default:
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break;
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}
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return (0);
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}
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static device_method_t smbios_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, smbios_identify),
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DEVMETHOD(device_probe, smbios_probe),
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DEVMETHOD(device_attach, smbios_attach),
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DEVMETHOD(device_detach, smbios_detach),
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{ 0, 0 }
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};
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static driver_t smbios_driver = {
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"smbios",
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smbios_methods,
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sizeof(struct smbios_softc),
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};
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DRIVER_MODULE(smbios, nexus, smbios_driver, smbios_modevent, NULL);
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#ifdef ARCH_MAY_USE_EFI
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MODULE_DEPEND(smbios, efirt, 1, 1, 1);
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#endif
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MODULE_VERSION(smbios, 1);
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static bool
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smbios_eps3 (void *v)
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{
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struct smbios3_eps *e;
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e = (struct smbios3_eps *)v;
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return (memcmp(e->anchor_string, SMBIOS3_SIG, SMBIOS3_LEN) == 0);
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}
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static int
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smbios_cksum (void *v)
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{
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struct smbios3_eps *eps3;
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struct smbios_eps *eps;
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u_int8_t *ptr;
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u_int8_t cksum;
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u_int8_t length;
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int i;
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if (smbios_eps3(v)) {
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eps3 = (struct smbios3_eps *)v;
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length = eps3->length;
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} else {
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eps = (struct smbios_eps *)v;
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length = eps->length;
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}
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ptr = (u_int8_t *)v;
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cksum = 0;
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for (i = 0; i < length; i++) {
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cksum += ptr[i];
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}
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return (cksum);
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}
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