/*-
* Copyright (c) 2006, 2008 Stanislav Sedov <stas@FreeBSD.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <err.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/ioccom.h>
#include <sys/cpuctl.h>
#include <machine/cpufunc.h>
#include <machine/specialreg.h>
#include "cpucontrol.h"
#include "intel.h"
#define DEFAULT_UCODE_SIZE 2000 /* Size of update data if not specified. */
int
intel_probe(int fd)
{
char vendor[13];
int error;
cpuctl_cpuid_args_t idargs = {
.level = 0,
};
error = ioctl(fd, CPUCTL_CPUID, &idargs);
if (error < 0) {
WARN(0, "ioctl()");
return (1);
}
((uint32_t *)vendor)[0] = idargs.data[1];
((uint32_t *)vendor)[1] = idargs.data[3];
((uint32_t *)vendor)[2] = idargs.data[2];
vendor[12] = '\0';
if (strncmp(vendor, INTEL_VENDOR_ID, sizeof(INTEL_VENDOR_ID)) != 0)
return (1);
return (0);
}
void
intel_update(const char *dev, const char *path)
{
int fd, devfd;
struct stat st;
uint32_t *fw_image;
int have_ext_table;
uint32_t sum;
unsigned int i;
size_t payload_size;
intel_fw_header_t *fw_header;
intel_cpu_signature_t *ext_table;
intel_ext_header_t *ext_header;
uint32_t signature, flags;
int32_t revision;
ssize_t ext_size;
size_t ext_table_size;
void *fw_data;
size_t data_size, total_size;
cpuctl_msr_args_t msrargs = {
.msr = MSR_IA32_PLATFORM_ID,
};
cpuctl_cpuid_args_t idargs = {
.level = 1, /* Signature. */
};
cpuctl_update_args_t args;
int error;
assert(path);
assert(dev);
fd = -1;
fw_image = MAP_FAILED;
ext_table = NULL;
ext_header = NULL;
devfd = open(dev, O_RDWR);
if (devfd < 0) {
WARN(0, "could not open %s for writing", dev);
return;
}
error = ioctl(devfd, CPUCTL_CPUID, &idargs);
if (error < 0) {
WARN(0, "ioctl(%s)", dev);
goto fail;
}
signature = idargs.data[0];
error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
if (error < 0) {
WARN(0, "ioctl(%s)", dev);
goto fail;
}
/*
* MSR_IA32_PLATFORM_ID contains flag in BCD in bits 52-50.
*/
flags = 1 << ((msrargs.data >> 50) & 7);
msrargs.msr = MSR_BIOS_SIGN;
error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
if (error < 0) {
WARN(0, "ioctl(%s)", dev);
goto fail;
}
revision = msrargs.data >> 32; /* Revision in the high dword. */
WARNX(2, "found cpu type %#x family %#x model %#x stepping %#x.",
(signature >> 12) & 0x03, (signature >> 8) & 0x0f,
(signature >> 4) & 0x0f, (signature >> 0) & 0x0f);
/*
* Open firmware image.
*/
fd = open(path, O_RDONLY, 0);
if (fd < 0) {
WARN(0, "open(%s)", path);
return;
}
error = fstat(fd, &st);
if (error != 0) {
WARN(0, "fstat(%s)", path);
goto fail;
}
if (st.st_size < 0 || (unsigned)st.st_size < sizeof(*fw_header)) {
WARNX(2, "file too short: %s", path);
goto fail;
}
/*
* mmap the whole image.
*/
fw_image = (uint32_t *)mmap(NULL, st.st_size, PROT_READ,
MAP_PRIVATE, fd, 0);
if (fw_image == MAP_FAILED) {
WARN(0, "mmap(%s)", path);
goto fail;
}
fw_header = (intel_fw_header_t *)fw_image;
if (fw_header->header_version != INTEL_HEADER_VERSION ||
fw_header->loader_revision != INTEL_LOADER_REVISION) {
WARNX(2, "%s is not a valid intel firmware: version mismatch",
path);
goto fail;
}
/*
* According to spec, if data_size == 0, then size of ucode = 2000.
*/
if (fw_header->data_size == 0)
data_size = DEFAULT_UCODE_SIZE;
else
data_size = fw_header->data_size;
if (fw_header->total_size == 0)
total_size = data_size + sizeof(*fw_header);
else
total_size = fw_header->total_size;
if (total_size > (unsigned)st.st_size || st.st_size < 0) {
WARNX(2, "file too short: %s", path);
goto fail;
}
payload_size = data_size + sizeof(*fw_header);
/*
* Check the primary checksum.
*/
sum = 0;
for (i = 0; i < (payload_size / sizeof(uint32_t)); i++)
sum += *((uint32_t *)fw_image + i);
if (sum != 0) {
WARNX(2, "%s: update data checksum invalid", path);
goto fail;
}
/*
* Check if there is an extended signature table.
*/
ext_size = total_size - payload_size;
have_ext_table = 0;
if (ext_size > (signed)sizeof(*ext_header)) {
ext_header =
(intel_ext_header_t *)((char *)fw_image + payload_size);
ext_table = (intel_cpu_signature_t *)(ext_header + 1);
/*
* Check the extended table size.
*/
ext_table_size = sizeof(*ext_header) +
ext_header->sig_count * sizeof(*ext_table);
if (ext_table_size + payload_size > total_size) {
WARNX(2, "%s: broken extended signature table", path);
goto no_table;
}
/*
* Check the extended table signature.
*/
sum = 0;
for (i = 0; i < (ext_table_size / sizeof(uint32_t)); i++)
sum += *((uint32_t *)ext_header + i);
if (sum != 0) {
WARNX(2, "%s: extended signature table checksum invalid",
path);
goto no_table;
}
have_ext_table = 1;
}
no_table:
fw_data = fw_header + 1; /* Pointer to the update data. */
/*
* Check if the given image is ok for this cpu.
*/
if (signature == fw_header->cpu_signature &&
(flags & fw_header->cpu_flags) != 0)
goto matched;
else if (have_ext_table != 0) {
for (i = 0; i < ext_header->sig_count; i++) {
uint32_t sig = ext_table[i].cpu_signature;
if (signature == sig &&
(flags & ext_table[i].cpu_flags) != 0)
goto matched;
}
} else
goto fail;
matched:
if (revision >= fw_header->revision) {
WARNX(1, "skipping %s of rev %#x: up to date",
path, fw_header->revision);
return;
}
fprintf(stderr, "%s: updating cpu %s from rev %#x to rev %#x... ",
path, dev, revision, fw_header->revision);
args.data = fw_data;
args.size = data_size;
error = ioctl(devfd, CPUCTL_UPDATE, &args);
if (error < 0) {
error = errno;
fprintf(stderr, "failed.\n");
errno = error;
WARN(0, "ioctl()");
goto fail;
}
fprintf(stderr, "done.\n");
fail:
if (fw_image != MAP_FAILED)
if (munmap(fw_image, st.st_size) != 0)
warn("munmap(%s)", path);
if (devfd >= 0)
close(devfd);
if (fd >= 0)
close(fd);
return;
}
