1 /*-
2 * Copyright (c) 2012 Andriy Gapon <avg@FreeBSD.org>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <sys/mman.h>
29 #include <sys/ioctl.h>
30 #include <sys/ioccom.h>
31 #include <sys/cpuctl.h>
32
33 #include <machine/cpufunc.h>
34 #include <machine/specialreg.h>
35
36 #include <x86/ucode.h>
37
38 #include <assert.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43 #include <fcntl.h>
44 #include <err.h>
45
46 #include "cpucontrol.h"
47 #include "amd.h"
48
49 int
amd10h_probe(int fd)50 amd10h_probe(int fd)
51 {
52 char vendor[13];
53 cpuctl_cpuid_args_t idargs;
54 uint32_t family;
55 uint32_t signature;
56 int error;
57
58 idargs.level = 0;
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
71 idargs.level = 1;
72 error = ioctl(fd, CPUCTL_CPUID, &idargs);
73 if (error < 0) {
74 WARN(0, "ioctl()");
75 return (1);
76 }
77 signature = idargs.data[0];
78 family = ((signature >> 8) & 0x0f) + ((signature >> 20) & 0xff);
79 if (family < 0x10)
80 return (1);
81 return (0);
82 }
83
84 void
amd10h_update(const struct ucode_update_params * params)85 amd10h_update(const struct ucode_update_params *params)
86 {
87 cpuctl_cpuid_args_t idargs;
88 cpuctl_msr_args_t msrargs;
89 cpuctl_update_args_t args;
90 const uint8_t *fw_image;
91 const char *dev, *path;
92 const void *selected_fw;
93 size_t fw_size;
94 size_t selected_size;
95 uint32_t revision;
96 uint32_t new_rev;
97 uint32_t signature;
98 int devfd;
99 int error;
100
101 dev = params->dev_path;
102 path = params->fw_path;
103 devfd = params->devfd;
104 fw_image = params->fwimage;
105 fw_size = params->fwsize;
106
107 assert(path);
108 assert(dev);
109
110 idargs.level = 1;
111 error = ioctl(devfd, CPUCTL_CPUID, &idargs);
112 if (error < 0) {
113 WARN(0, "ioctl()");
114 goto done;
115 }
116 signature = idargs.data[0];
117
118 msrargs.msr = MSR_BIOS_SIGN;
119 error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
120 if (error < 0) {
121 WARN(0, "ioctl(%s)", dev);
122 goto done;
123 }
124 revision = (uint32_t)msrargs.data;
125
126 selected_fw = ucode_amd_find(path, signature, revision, fw_image,
127 fw_size, &selected_size);
128
129 if (selected_fw != NULL) {
130 WARNX(1, "selected ucode size is %zu", selected_size);
131 fprintf(stderr, "%s: updating cpu %s to revision %#x... ",
132 path, dev, revision);
133
134 args.data = __DECONST(void *, selected_fw);
135 args.size = selected_size;
136 error = ioctl(devfd, CPUCTL_UPDATE, &args);
137 if (error < 0) {
138 fprintf(stderr, "failed.\n");
139 warn("ioctl()");
140 goto done;
141 }
142 fprintf(stderr, "done.\n");
143 }
144
145 msrargs.msr = MSR_BIOS_SIGN;
146 error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
147 if (error < 0) {
148 WARN(0, "ioctl(%s)", dev);
149 goto done;
150 }
151 new_rev = (uint32_t)msrargs.data;
152 if (new_rev != revision)
153 WARNX(0, "revision after update %#x", new_rev);
154
155 done:
156 return;
157 }
158