285 lines
7.2 KiB
C
285 lines
7.2 KiB
C
/*-
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* Copyright (c) 2006, 2008 Stanislav Sedov <stas@FreeBSD.org>.
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <err.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <sys/ioctl.h>
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#include <sys/ioccom.h>
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#include <sys/cpuctl.h>
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#include <machine/cpufunc.h>
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#include <machine/specialreg.h>
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#include "cpucontrol.h"
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#include "intel.h"
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#define DEFAULT_UCODE_SIZE 2000 /* Size of update data if not specified. */
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int
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intel_probe(int fd)
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{
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char vendor[13];
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int error;
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cpuctl_cpuid_args_t idargs = {
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.level = 0,
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};
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error = ioctl(fd, CPUCTL_CPUID, &idargs);
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if (error < 0) {
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WARN(0, "ioctl()");
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return (1);
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}
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((uint32_t *)vendor)[0] = idargs.data[1];
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((uint32_t *)vendor)[1] = idargs.data[3];
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((uint32_t *)vendor)[2] = idargs.data[2];
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vendor[12] = '\0';
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if (strncmp(vendor, INTEL_VENDOR_ID, sizeof(INTEL_VENDOR_ID)) != 0)
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return (1);
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return (0);
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}
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void
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intel_update(const char *dev, const char *path)
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{
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int fd, devfd;
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struct stat st;
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uint32_t *fw_image;
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int have_ext_table;
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uint32_t sum;
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unsigned int i;
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size_t payload_size;
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intel_fw_header_t *fw_header;
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intel_cpu_signature_t *ext_table;
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intel_ext_header_t *ext_header;
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uint32_t signature, flags;
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int32_t revision;
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ssize_t ext_size;
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size_t ext_table_size;
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void *fw_data;
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size_t data_size, total_size;
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cpuctl_msr_args_t msrargs = {
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.msr = MSR_IA32_PLATFORM_ID,
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};
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cpuctl_cpuid_args_t idargs = {
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.level = 1, /* Signature. */
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};
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cpuctl_update_args_t args;
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int error;
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assert(path);
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assert(dev);
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fd = -1;
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fw_image = MAP_FAILED;
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ext_table = NULL;
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ext_header = NULL;
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devfd = open(dev, O_RDWR);
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if (devfd < 0) {
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WARN(0, "could not open %s for writing", dev);
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return;
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}
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error = ioctl(devfd, CPUCTL_CPUID, &idargs);
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if (error < 0) {
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WARN(0, "ioctl(%s)", dev);
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goto fail;
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}
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signature = idargs.data[0];
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error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
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if (error < 0) {
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WARN(0, "ioctl(%s)", dev);
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goto fail;
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}
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/*
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* MSR_IA32_PLATFORM_ID contains flag in BCD in bits 52-50.
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*/
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flags = 1 << ((msrargs.data >> 50) & 7);
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msrargs.msr = MSR_BIOS_SIGN;
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error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
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if (error < 0) {
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WARN(0, "ioctl(%s)", dev);
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goto fail;
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}
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revision = msrargs.data >> 32; /* Revision in the high dword. */
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WARNX(2, "found cpu type %#x family %#x model %#x stepping %#x.",
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(signature >> 12) & 0x03, (signature >> 8) & 0x0f,
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(signature >> 4) & 0x0f, (signature >> 0) & 0x0f);
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/*
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* Open firmware image.
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*/
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fd = open(path, O_RDONLY, 0);
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if (fd < 0) {
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WARN(0, "open(%s)", path);
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return;
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}
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error = fstat(fd, &st);
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if (error != 0) {
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WARN(0, "fstat(%s)", path);
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goto fail;
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}
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if (st.st_size < 0 || (unsigned)st.st_size < sizeof(*fw_header)) {
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WARNX(2, "file too short: %s", path);
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goto fail;
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}
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/*
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* mmap the whole image.
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*/
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fw_image = (uint32_t *)mmap(NULL, st.st_size, PROT_READ,
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MAP_PRIVATE, fd, 0);
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if (fw_image == MAP_FAILED) {
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WARN(0, "mmap(%s)", path);
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goto fail;
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}
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fw_header = (intel_fw_header_t *)fw_image;
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if (fw_header->header_version != INTEL_HEADER_VERSION ||
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fw_header->loader_revision != INTEL_LOADER_REVISION) {
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WARNX(2, "%s is not a valid intel firmware: version mismatch",
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path);
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goto fail;
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}
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/*
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* According to spec, if data_size == 0, then size of ucode = 2000.
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*/
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if (fw_header->data_size == 0)
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data_size = DEFAULT_UCODE_SIZE;
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else
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data_size = fw_header->data_size;
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if (fw_header->total_size == 0)
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total_size = data_size + sizeof(*fw_header);
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else
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total_size = fw_header->total_size;
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if (total_size > (unsigned)st.st_size || st.st_size < 0) {
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WARNX(2, "file too short: %s", path);
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goto fail;
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}
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payload_size = data_size + sizeof(*fw_header);
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/*
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* Check the primary checksum.
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*/
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sum = 0;
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for (i = 0; i < (payload_size / sizeof(uint32_t)); i++)
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sum += *((uint32_t *)fw_image + i);
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if (sum != 0) {
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WARNX(2, "%s: update data checksum invalid", path);
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goto fail;
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}
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/*
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* Check if there is an extended signature table.
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*/
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ext_size = total_size - payload_size;
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have_ext_table = 0;
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if (ext_size > (signed)sizeof(*ext_header)) {
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ext_header =
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(intel_ext_header_t *)((char *)fw_image + payload_size);
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ext_table = (intel_cpu_signature_t *)(ext_header + 1);
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/*
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* Check the extended table size.
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*/
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ext_table_size = sizeof(*ext_header) +
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ext_header->sig_count * sizeof(*ext_table);
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if (ext_table_size + payload_size > total_size) {
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WARNX(2, "%s: broken extended signature table", path);
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goto no_table;
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}
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/*
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* Check the extended table signature.
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*/
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sum = 0;
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for (i = 0; i < (ext_table_size / sizeof(uint32_t)); i++)
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sum += *((uint32_t *)ext_header + i);
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if (sum != 0) {
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WARNX(2, "%s: extended signature table checksum invalid",
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path);
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goto no_table;
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}
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have_ext_table = 1;
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}
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no_table:
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fw_data = fw_header + 1; /* Pointer to the update data. */
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/*
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* Check if the given image is ok for this cpu.
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*/
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if (signature == fw_header->cpu_signature &&
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(flags & fw_header->cpu_flags) != 0)
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goto matched;
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else if (have_ext_table != 0) {
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for (i = 0; i < ext_header->sig_count; i++) {
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uint32_t sig = ext_table[i].cpu_signature;
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if (signature == sig &&
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(flags & ext_table[i].cpu_flags) != 0)
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goto matched;
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}
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} else
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goto fail;
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matched:
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if (revision >= fw_header->revision) {
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WARNX(1, "skipping %s of rev %#x: up to date",
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path, fw_header->revision);
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return;
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}
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fprintf(stderr, "%s: updating cpu %s from rev %#x to rev %#x... ",
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path, dev, revision, fw_header->revision);
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args.data = fw_data;
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args.size = data_size;
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error = ioctl(devfd, CPUCTL_UPDATE, &args);
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if (error < 0) {
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fprintf(stderr, "failed.\n");
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WARN(0, "ioctl()");
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goto fail;
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}
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fprintf(stderr, "done.\n");
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fail:
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if (fw_image != MAP_FAILED)
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if (munmap(fw_image, st.st_size) != 0)
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warn("munmap(%s)", path);
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if (devfd >= 0)
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close(devfd);
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if (fd >= 0)
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close(fd);
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return;
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}
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