freebsd-src/usr.sbin/cpucontrol/amd.c
Andriy Gapon 4ced504bff cpucontrol: use CPUCTL_UPDATE ioctl on correct file descriptor
I guess that means that microcode update has never worked for AMD CPUs.
Please also note that only older AMD CPUs and micrcode file format are
supported anyway (pre 10h family).

MFC after:	1 week
2012-06-03 08:30:00 +00:00

182 lines
4.5 KiB
C

/*-
* 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 <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 "amd.h"
int
amd_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, AMD_VENDOR_ID, sizeof(AMD_VENDOR_ID)) != 0)
return (1);
return (0);
}
void
amd_update(const char *dev, const char *path)
{
int fd, devfd;
unsigned int i;
struct stat st;
uint32_t *fw_image;
amd_fw_header_t *fw_header;
uint32_t sum;
uint32_t signature;
uint32_t *fw_data;
size_t fw_size;
cpuctl_cpuid_args_t idargs = {
.level = 1, /* Request signature. */
};
cpuctl_update_args_t args;
int error;
assert(path);
assert(dev);
fd = -1;
fw_image = MAP_FAILED;
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()");
goto fail;
}
signature = idargs.data[0];
WARNX(2, "found cpu family %#x model %#x "
"stepping %#x extfamily %#x extmodel %#x.",
(signature >> 8) & 0x0f, (signature >> 4) & 0x0f,
(signature >> 0) & 0x0f, (signature >> 20) & 0xff,
(signature >> 16) & 0x0f);
/*
* Open the firmware file.
*/
fd = open(path, O_RDONLY, 0);
if (fd < 0) {
WARN(0, "open(%s)", path);
goto fail;
}
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 = (amd_fw_header_t *)fw_image;
if ((fw_header->magic >> 8) != AMD_MAGIC) {
WARNX(2, "%s is not a valid amd firmware: version mismatch",
path);
goto fail;
}
fw_data = (uint32_t *)(fw_header + 1);
fw_size = (st.st_size - sizeof(*fw_header)) / sizeof(uint32_t);
/*
* Check the primary checksum.
*/
sum = 0;
for (i = 0; i < fw_size; i++)
sum += fw_data[i];
if (sum != fw_header->checksum) {
WARNX(2, "%s: update data checksum invalid", path);
goto fail;
}
if (signature == fw_header->signature) {
fprintf(stderr, "%s: updating cpu %s... ", path, dev);
args.data = fw_image;
args.size = st.st_size;
error = ioctl(devfd, CPUCTL_UPDATE, &args);
if (error < 0) {
fprintf(stderr, "failed.\n");
warn("ioctl()");
goto fail;
}
fprintf(stderr, "done.\n");
}
fail:
if (fd >= 0)
close(fd);
if (devfd >= 0)
close(devfd);
if (fw_image != MAP_FAILED)
if(munmap(fw_image, st.st_size) != 0)
warn("munmap(%s)", path);
return;
}