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
49int
50amd10h_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
84void
85amd10h_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
155done:
156	return;
157}
158