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 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 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