usr.sbin/cpucontrol/amd10h.c

   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/cdefs.h>
  27 __FBSDID("$FreeBSD$");
  28
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <sys/mman.h>
  32 #include <sys/ioctl.h>
  33 #include <sys/ioccom.h>
  34 #include <sys/cpuctl.h>
  35
  36 #include <machine/cpufunc.h>
  37 #include <machine/specialreg.h>
  38
  39 #include <assert.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <unistd.h>
  44 #include <fcntl.h>
  45 #include <err.h>
  46
  47 #include "cpucontrol.h"
  48 #include "amd.h"
  49
  50 int
  51 amd10h_probe(int fd)
  52 {
  53         char vendor[13];
  54         cpuctl_cpuid_args_t idargs;
  55         uint32_t family;
  56         uint32_t signature;
  57         int error;
  58
  59         idargs.level = 0;
  60         error = ioctl(fd, CPUCTL_CPUID, &idargs);
  61         if (error < 0) {
  62                 WARN(0, "ioctl()");
  63                 return (1);
  64         }
  65         ((uint32_t *)vendor)[0] = idargs.data[1];
  66         ((uint32_t *)vendor)[1] = idargs.data[3];
  67         ((uint32_t *)vendor)[2] = idargs.data[2];
  68         vendor[12] = '\0';
  69         if (strncmp(vendor, AMD_VENDOR_ID, sizeof(AMD_VENDOR_ID)) != 0)
  70                 return (1);
  71
  72         idargs.level = 1;
  73         error = ioctl(fd, CPUCTL_CPUID, &idargs);
  74         if (error < 0) {
  75                 WARN(0, "ioctl()");
  76                 return (1);
  77         }
  78         signature = idargs.data[0];
  79         family = ((signature >> 8) & 0x0f) + ((signature >> 20) & 0xff);
  80         if (family < 0x10)
  81                 return (1);
  82         return (0);
  83 }
  84
  85 /*
  86  * NB: the format of microcode update files is not documented by AMD.
  87  * It has been reverse engineered from studying Coreboot, illumos and Linux
  88  * source code.
  89  */
  90 void
  91 amd10h_update(const char *dev, const char *path)
  92 {
  93         struct stat st;
  94         cpuctl_cpuid_args_t idargs;
  95         cpuctl_msr_args_t msrargs;
  96         cpuctl_update_args_t args;
  97         const amd_10h_fw_header_t *fw_header;
  98         const amd_10h_fw_header_t *selected_fw;
  99         const equiv_cpu_entry_t *equiv_cpu_table;
 100         const section_header_t *section_header;
 101         const container_header_t *container_header;
 102         const uint8_t *fw_data;
 103         uint8_t *fw_image;
 104         size_t fw_size;
 105         size_t selected_size;
 106         uint32_t revision;
 107         uint32_t new_rev;
 108         uint32_t signature;
 109         uint16_t equiv_id;
 110         int fd, devfd;
 111         unsigned int i;
 112         int error;
 113
 114         assert(path);
 115         assert(dev);
 116
 117         fd = -1;
 118         fw_image = MAP_FAILED;
 119         devfd = open(dev, O_RDWR);
 120         if (devfd < 0) {
 121                 WARN(0, "could not open %s for writing", dev);
 122                 return;
 123         }
 124         idargs.level = 1;
 125         error = ioctl(devfd, CPUCTL_CPUID, &idargs);
 126         if (error < 0) {
 127                 WARN(0, "ioctl()");
 128                 goto done;
 129         }
 130         signature = idargs.data[0];
 131
 132         msrargs.msr = 0x0000008b;
 133         error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
 134         if (error < 0) {
 135                 WARN(0, "ioctl(%s)", dev);
 136                 goto done;
 137         }
 138         revision = (uint32_t)msrargs.data;
 139
 140         WARNX(1, "found cpu family %#x model %#x "
 141             "stepping %#x extfamily %#x extmodel %#x.",
 142             (signature >> 8) & 0x0f, (signature >> 4) & 0x0f,
 143             (signature >> 0) & 0x0f, (signature >> 20) & 0xff,
 144             (signature >> 16) & 0x0f);
 145         WARNX(1, "microcode revision %#x", revision);
 146
 147         /*
 148          * Open the firmware file.
 149          */
 150         fd = open(path, O_RDONLY, 0);
 151         if (fd < 0) {
 152                 WARN(0, "open(%s)", path);
 153                 goto done;
 154         }
 155         error = fstat(fd, &st);
 156         if (error != 0) {
 157                 WARN(0, "fstat(%s)", path);
 158                 goto done;
 159         }
 160         if (st.st_size < 0 || (size_t)st.st_size <
 161             (sizeof(*container_header) + sizeof(*section_header))) {
 162                 WARNX(2, "file too short: %s", path);
 163                 goto done;
 164         }
 165         fw_size = st.st_size;
 166
 167         /*
 168          * mmap the whole image.
 169          */
 170         fw_image = (uint8_t *)mmap(NULL, st.st_size, PROT_READ,
 171             MAP_PRIVATE, fd, 0);
 172         if (fw_image == MAP_FAILED) {
 173                 WARN(0, "mmap(%s)", path);
 174                 goto done;
 175         }
 176
 177         fw_data = fw_image;
 178         container_header = (const container_header_t *)fw_data;
 179         if (container_header->magic != AMD_10H_MAGIC) {
 180                 WARNX(2, "%s is not a valid amd firmware: bad magic", path);
 181                 goto done;
 182         }
 183         fw_data += sizeof(*container_header);
 184         fw_size -= sizeof(*container_header);
 185
 186         section_header = (const section_header_t *)fw_data;
 187         if (section_header->type != AMD_10H_EQUIV_TABLE_TYPE) {
 188                 WARNX(2, "%s is not a valid amd firmware: "
 189                     "first section is not CPU equivalence table", path);
 190                 goto done;
 191         }
 192         if (section_header->size == 0) {
 193                 WARNX(2, "%s is not a valid amd firmware: "
 194                     "first section is empty", path);
 195                 goto done;
 196         }
 197         fw_data += sizeof(*section_header);
 198         fw_size -= sizeof(*section_header);
 199
 200         if (section_header->size > fw_size) {
 201                 WARNX(2, "%s is not a valid amd firmware: "
 202                     "file is truncated", path);
 203                 goto done;
 204         }
 205         if (section_header->size < sizeof(*equiv_cpu_table)) {
 206                 WARNX(2, "%s is not a valid amd firmware: "
 207                     "first section is too short", path);
 208                 goto done;
 209         }
 210         equiv_cpu_table = (const equiv_cpu_entry_t *)fw_data;
 211         fw_data += section_header->size;
 212         fw_size -= section_header->size;
 213
 214         equiv_id = 0;
 215         for (i = 0; equiv_cpu_table[i].installed_cpu != 0; i++) {
 216                 printf("TEST %s %08x %08x\n", path, signature, equiv_cpu_table[i].installed_cpu);
 217                 if (signature == equiv_cpu_table[i].installed_cpu) {
 218                         equiv_id = equiv_cpu_table[i].equiv_cpu;
 219                         WARNX(3, "equiv_id: %x", equiv_id);
 220                         break;
 221                 }
 222         }
 223         if (equiv_id == 0) {
 224                 WARNX(2, "CPU is not found in the equivalence table");
 225                 goto done;
 226         }
 227
 228         selected_fw = NULL;
 229         selected_size = 0;
 230         while (fw_size >= sizeof(*section_header)) {
 231                 section_header = (const section_header_t *)fw_data;
 232                 fw_data += sizeof(*section_header);
 233                 fw_size -= sizeof(*section_header);
 234                 if (section_header->type != AMD_10H_uCODE_TYPE) {
 235                         WARNX(2, "%s is not a valid amd firmware: "
 236                             "section has incorret type", path);
 237                         goto done;
 238                 }
 239                 if (section_header->size > fw_size) {
 240                         WARNX(2, "%s is not a valid amd firmware: "
 241                             "file is truncated", path);
 242                         goto done;
 243                 }
 244                 if (section_header->size < sizeof(*fw_header)) {
 245                         WARNX(2, "%s is not a valid amd firmware: "
 246                             "section is too short", path);
 247                         goto done;
 248                 }
 249                 fw_header = (const amd_10h_fw_header_t *)fw_data;
 250                 fw_data += section_header->size;
 251                 fw_size -= section_header->size;
 252
 253                 if (fw_header->processor_rev_id != equiv_id)
 254                         continue; /* different cpu */
 255                 if (fw_header->patch_id <= revision)
 256                         continue; /* not newer revision */
 257                 if (fw_header->nb_dev_id != 0 || fw_header->sb_dev_id != 0) {
 258                         WARNX(2, "Chipset-specific microcode is not supported");
 259                 }
 260
 261                 WARNX(3, "selecting revision: %x", fw_header->patch_id);
 262                 revision = fw_header->patch_id;
 263                 selected_fw = fw_header;
 264                 selected_size = section_header->size;
 265         }
 266
 267         if (fw_size != 0) {
 268                 WARNX(2, "%s is not a valid amd firmware: "
 269                     "file is truncated", path);
 270                 goto done;
 271         }
 272
 273         if (selected_fw != NULL) {
 274                 WARNX(1, "selected ucode size is %zu", selected_size);
 275                 fprintf(stderr, "%s: updating cpu %s to revision %#x... ",
 276                     path, dev, revision);
 277
 278                 args.data = __DECONST(void *, selected_fw);
 279                 args.size = selected_size;
 280                 error = ioctl(devfd, CPUCTL_UPDATE, &args);
 281                 if (error < 0) {
 282                         fprintf(stderr, "failed.\n");
 283                         warn("ioctl()");
 284                         goto done;
 285                 }
 286                 fprintf(stderr, "done.\n");
 287         }
 288
 289         msrargs.msr = 0x0000008b;
 290         error = ioctl(devfd, CPUCTL_RDMSR, &msrargs);
 291         if (error < 0) {
 292                 WARN(0, "ioctl(%s)", dev);
 293                 goto done;
 294         }
 295         new_rev = (uint32_t)msrargs.data;
 296         if (new_rev != revision)
 297                 WARNX(0, "revision after update %#x", new_rev);
 298
 299 done:
 300         if (fd >= 0)
 301                 close(fd);
 302         if (devfd >= 0)
 303                 close(devfd);
 304         if (fw_image != MAP_FAILED)
 305                 if (munmap(fw_image, st.st_size) != 0)
 306                         warn("munmap(%s)", path);
 307         return;
 308 }