1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2006, 2008 Stanislav Sedov <stas@FreeBSD.org>.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29#include <assert.h>
30#include <stdio.h>
31#include <stdlib.h>
32#include <string.h>
33#include <unistd.h>
34#include <fcntl.h>
35#include <err.h>
36
37#include <sys/types.h>
38#include <sys/stat.h>
39#include <sys/mman.h>
40#include <sys/ioctl.h>
41#include <sys/ioccom.h>
42#include <sys/cpuctl.h>
43
44#include <machine/cpufunc.h>
45#include <machine/specialreg.h>
46
47#include "cpucontrol.h"
48#include "amd.h"
49
50int
51amd_probe(int fd)
52{
53	char vendor[13];
54	int error;
55	cpuctl_cpuid_args_t idargs = {
56		.level  = 0,
57	};
58
59	error = ioctl(fd, CPUCTL_CPUID, &idargs);
60	if (error < 0) {
61		WARN(0, "ioctl()");
62		return (1);
63	}
64	((uint32_t *)vendor)[0] = idargs.data[1];
65	((uint32_t *)vendor)[1] = idargs.data[3];
66	((uint32_t *)vendor)[2] = idargs.data[2];
67	vendor[12] = '\0';
68	if (strncmp(vendor, AMD_VENDOR_ID, sizeof(AMD_VENDOR_ID)) != 0)
69		return (1);
70	return (0);
71}
72
73void
74amd_update(const struct ucode_update_params *params)
75{
76	int devfd;
77	unsigned int i;
78	const char *dev, *path;
79	const uint32_t *fw_image;
80	const amd_fw_header_t *fw_header;
81	uint32_t sum;
82	uint32_t signature;
83	const uint32_t *fw_data;
84	size_t fw_size;
85	cpuctl_cpuid_args_t idargs = {
86		.level  = 1,	/* Request signature. */
87	};
88	cpuctl_update_args_t args;
89	int error;
90
91	dev = params->dev_path;
92	path = params->fw_path;
93	devfd = params->devfd;
94	fw_image = params->fwimage;
95
96	assert(path);
97	assert(dev);
98
99	error = ioctl(devfd, CPUCTL_CPUID, &idargs);
100	if (error < 0) {
101		WARN(0, "ioctl()");
102		goto fail;
103	}
104	signature = idargs.data[0];
105	WARNX(2, "found cpu family %#x model %#x "
106	    "stepping %#x extfamily %#x extmodel %#x.",
107	    (signature >> 8) & 0x0f, (signature >> 4) & 0x0f,
108	    (signature >> 0) & 0x0f, (signature >> 20) & 0xff,
109	    (signature >> 16) & 0x0f);
110
111	/*
112	 * Open the firmware file.
113	 */
114	if (params->fwsize < sizeof(*fw_header)) {
115		WARNX(2, "file too short: %s", path);
116		goto fail;
117	}
118	fw_header = (const amd_fw_header_t *)fw_image;
119	if ((fw_header->magic >> 8) != AMD_MAGIC) {
120		WARNX(2, "%s is not a valid amd firmware: version mismatch",
121		    path);
122		goto fail;
123	}
124	fw_data = (const uint32_t *)(fw_header + 1);
125	fw_size = (params->fwsize - sizeof(*fw_header)) / sizeof(uint32_t);
126
127	/*
128	 * Check the primary checksum.
129	 */
130	sum = 0;
131	for (i = 0; i < fw_size; i++)
132		sum += fw_data[i];
133	if (sum != fw_header->checksum) {
134		WARNX(2, "%s: update data checksum invalid", path);
135		goto fail;
136	}
137	if (signature == fw_header->signature) {
138		fprintf(stderr, "%s: updating cpu %s... ", path, dev);
139
140		args.data = __DECONST(void *, fw_image);
141		args.size = params->fwsize;
142		error = ioctl(devfd, CPUCTL_UPDATE, &args);
143		if (error < 0) {
144			fprintf(stderr, "failed.\n");
145			warn("ioctl()");
146			goto fail;
147		}
148		fprintf(stderr, "done.\n");
149	}
150
151fail:
152	return;
153}
154