1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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__FBSDID("$FreeBSD$");
30
31#include <assert.h>
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
35#include <unistd.h>
36#include <fcntl.h>
37#include <err.h>
38
39#include <sys/types.h>
40#include <sys/stat.h>
41#include <sys/mman.h>
42#include <sys/ioctl.h>
43#include <sys/ioccom.h>
44#include <sys/cpuctl.h>
45
46#include <machine/cpufunc.h>
47#include <machine/specialreg.h>
48
49#include "cpucontrol.h"
50#include "amd.h"
51
52int
53amd_probe(int fd)
54{
55	char vendor[13];
56	int error;
57	cpuctl_cpuid_args_t idargs = {
58		.level  = 0,
59	};
60
61	error = ioctl(fd, CPUCTL_CPUID, &idargs);
62	if (error < 0) {
63		WARN(0, "ioctl()");
64		return (1);
65	}
66	((uint32_t *)vendor)[0] = idargs.data[1];
67	((uint32_t *)vendor)[1] = idargs.data[3];
68	((uint32_t *)vendor)[2] = idargs.data[2];
69	vendor[12] = '\0';
70	if (strncmp(vendor, AMD_VENDOR_ID, sizeof(AMD_VENDOR_ID)) != 0)
71		return (1);
72	return (0);
73}
74
75void
76amd_update(const struct ucode_update_params *params)
77{
78	int devfd;
79	unsigned int i;
80	const char *dev, *path;
81	const uint32_t *fw_image;
82	const amd_fw_header_t *fw_header;
83	uint32_t sum;
84	uint32_t signature;
85	const uint32_t *fw_data;
86	size_t fw_size;
87	cpuctl_cpuid_args_t idargs = {
88		.level  = 1,	/* Request signature. */
89	};
90	cpuctl_update_args_t args;
91	int error;
92
93	dev = params->dev_path;
94	path = params->fw_path;
95	devfd = params->devfd;
96	fw_image = params->fwimage;
97
98	assert(path);
99	assert(dev);
100
101	error = ioctl(devfd, CPUCTL_CPUID, &idargs);
102	if (error < 0) {
103		WARN(0, "ioctl()");
104		goto fail;
105	}
106	signature = idargs.data[0];
107	WARNX(2, "found cpu family %#x model %#x "
108	    "stepping %#x extfamily %#x extmodel %#x.",
109	    (signature >> 8) & 0x0f, (signature >> 4) & 0x0f,
110	    (signature >> 0) & 0x0f, (signature >> 20) & 0xff,
111	    (signature >> 16) & 0x0f);
112
113	/*
114	 * Open the firmware file.
115	 */
116	if (params->fwsize < sizeof(*fw_header)) {
117		WARNX(2, "file too short: %s", path);
118		goto fail;
119	}
120	fw_header = (const amd_fw_header_t *)fw_image;
121	if ((fw_header->magic >> 8) != AMD_MAGIC) {
122		WARNX(2, "%s is not a valid amd firmware: version mismatch",
123		    path);
124		goto fail;
125	}
126	fw_data = (const uint32_t *)(fw_header + 1);
127	fw_size = (params->fwsize - sizeof(*fw_header)) / sizeof(uint32_t);
128
129	/*
130	 * Check the primary checksum.
131	 */
132	sum = 0;
133	for (i = 0; i < fw_size; i++)
134		sum += fw_data[i];
135	if (sum != fw_header->checksum) {
136		WARNX(2, "%s: update data checksum invalid", path);
137		goto fail;
138	}
139	if (signature == fw_header->signature) {
140		fprintf(stderr, "%s: updating cpu %s... ", path, dev);
141
142		args.data = __DECONST(void *, fw_image);
143		args.size = params->fwsize;
144		error = ioctl(devfd, CPUCTL_UPDATE, &args);
145		if (error < 0) {
146			fprintf(stderr, "failed.\n");
147			warn("ioctl()");
148			goto fail;
149		}
150		fprintf(stderr, "done.\n");
151	}
152
153fail:
154	return;
155}
156