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
50 int
amd_probe(int fd)51 amd_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
73 void
amd_update(const struct ucode_update_params * params)74 amd_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
151 fail:
152 return;
153 }
154