git.ozlabs.org Git - petitboot/blob - discover/platform-powerpc.c

   1
   2 #include <assert.h>
   3 #include <string.h>
   4 #include <stdlib.h>
   5 #include <limits.h>
   6 #include <errno.h>
   7 #include <sys/types.h>
   8 #include <sys/wait.h>
   9 #include <sys/fcntl.h>
  10 #include <sys/stat.h>
  11 #include <asm/byteorder.h>
  12
  13 #include <file/file.h>
  14 #include <talloc/talloc.h>
  15 #include <list/list.h>
  16 #include <log/log.h>
  17 #include <process/process.h>
  18 #include <types/types.h>
  19
  20 #include "hostboot.h"
  21 #include "platform.h"
  22 #include "ipmi.h"
  23 #include "dt.h"
  24
  25 static const char *partition = "common";
  26 static const char *sysparams_dir = "/sys/firmware/opal/sysparams/";
  27 static const char *devtree_dir = "/proc/device-tree/";
  28 static const int ipmi_timeout = 5000; /* milliseconds. */
  29
  30 struct param {
  31         char                    *name;
  32         char                    *value;
  33         bool                    modified;
  34         struct list_item        list;
  35 };
  36
  37 struct platform_powerpc {
  38         struct list     params;
  39         struct ipmi     *ipmi;
  40         bool            ipmi_bootdev_persistent;
  41         int             (*get_ipmi_bootdev)(
  42                                 struct platform_powerpc *platform,
  43                                 uint8_t *bootdev, bool *persistent);
  44         int             (*clear_ipmi_bootdev)(
  45                                 struct platform_powerpc *platform,
  46                                 bool persistent);
  47         int             (*set_os_boot_sensor)(
  48                                 struct platform_powerpc *platform);
  49         void            (*get_platform_versions)(struct system_info *info);
  50 };
  51
  52 static const char *known_params[] = {
  53         "auto-boot?",
  54         "petitboot,network",
  55         "petitboot,timeout",
  56         "petitboot,bootdev",
  57         "petitboot,bootdevs",
  58         "petitboot,language",
  59         "petitboot,debug?",
  60         "petitboot,write?",
  61         "petitboot,snapshots?",
  62         "petitboot,tty",
  63         NULL,
  64 };
  65
  66 #define to_platform_powerpc(p) \
  67         (struct platform_powerpc *)(p->platform_data)
  68
  69 /* a partition max a max size of 64k * 16bytes = 1M */
  70 static const int max_partition_size = 64 * 1024 * 16;
  71
  72 static bool param_is_known(const char *param, unsigned int len)
  73 {
  74         const char *known_param;
  75         unsigned int i;
  76
  77         for (i = 0; known_params[i]; i++) {
  78                 known_param = known_params[i];
  79                 if (len == strlen(known_param) &&
  80                                 !strncmp(param, known_param, len))
  81                         return true;
  82         }
  83
  84         return false;
  85 }
  86
  87 static int parse_nvram_params(struct platform_powerpc *platform,
  88                 char *buf, int len)
  89 {
  90         char *pos, *name, *value;
  91         unsigned int paramlen;
  92         int i, count;
  93
  94         /* discard 2 header lines:
  95          * "common" partiton"
  96          * ------------------
  97          */
  98         pos = buf;
  99         count = 0;
 100
 101         for (i = 0; i < len; i++) {
 102                 if (pos[i] == '\n')
 103                         count++;
 104                 if (count == 2)
 105                         break;
 106         }
 107
 108         if (i == len) {
 109                 fprintf(stderr, "failure parsing nvram output\n");
 110                 return -1;
 111         }
 112
 113         for (pos = buf + i; pos < buf + len; pos += paramlen + 1) {
 114                 unsigned int namelen;
 115                 struct param *param;
 116                 char *newline;
 117
 118                 newline = strchr(pos, '\n');
 119                 if (!newline)
 120                         break;
 121
 122                 *newline = '\0';
 123
 124                 paramlen = strlen(pos);
 125
 126                 name = pos;
 127                 value = strchr(pos, '=');
 128                 if (!value)
 129                         continue;
 130
 131                 namelen = value - name;
 132                 if (namelen == 0)
 133                         continue;
 134
 135                 if (!param_is_known(name, namelen))
 136                         continue;
 137
 138                 value++;
 139
 140                 param = talloc(platform, struct param);
 141                 param->modified = false;
 142                 param->name = talloc_strndup(platform, name, namelen);
 143                 param->value = talloc_strdup(platform, value);
 144                 list_add(&platform->params, &param->list);
 145         }
 146
 147         return 0;
 148 }
 149
 150 static int parse_nvram(struct platform_powerpc *platform)
 151 {
 152         struct process *process;
 153         const char *argv[5];
 154         int rc;
 155
 156         argv[0] = "nvram";
 157         argv[1] = "--print-config";
 158         argv[2] = "--partition";
 159         argv[3] = partition;
 160         argv[4] = NULL;
 161
 162         process = process_create(platform);
 163         process->path = "nvram";
 164         process->argv = argv;
 165         process->keep_stdout = true;
 166
 167         rc = process_run_sync(process);
 168
 169         if (rc || !process_exit_ok(process)) {
 170                 fprintf(stderr, "nvram process returned "
 171                                 "non-zero exit status\n");
 172                 rc = -1;
 173         } else {
 174                 rc = parse_nvram_params(platform, process->stdout_buf,
 175                                             process->stdout_len);
 176         }
 177
 178         process_release(process);
 179         return rc;
 180 }
 181
 182 static int write_nvram(struct platform_powerpc *platform)
 183 {
 184         struct process *process;
 185         struct param *param;
 186         const char *argv[6];
 187         int rc = 0;
 188
 189         argv[0] = "nvram";
 190         argv[1] = "--update-config";
 191         argv[2] = NULL;
 192         argv[3] = "--partition";
 193         argv[4] = partition;
 194         argv[5] = NULL;
 195
 196         process = process_create(platform);
 197         process->path = "nvram";
 198         process->argv = argv;
 199
 200         list_for_each_entry(&platform->params, param, list) {
 201                 char *paramstr;
 202
 203                 if (!param->modified)
 204                         continue;
 205
 206                 paramstr = talloc_asprintf(platform, "%s=%s",
 207                                 param->name, param->value);
 208                 argv[2] = paramstr;
 209
 210                 rc = process_run_sync(process);
 211
 212                 talloc_free(paramstr);
 213
 214                 if (rc || !process_exit_ok(process)) {
 215                         rc = -1;
 216                         pb_log("nvram update process returned "
 217                                         "non-zero exit status\n");
 218                         break;
 219                 }
 220         }
 221
 222         process_release(process);
 223         return rc;
 224 }
 225
 226 static const char *get_param(struct platform_powerpc *platform,
 227                 const char *name)
 228 {
 229         struct param *param;
 230
 231         list_for_each_entry(&platform->params, param, list)
 232                 if (!strcmp(param->name, name))
 233                         return param->value;
 234         return NULL;
 235 }
 236
 237 static void set_param(struct platform_powerpc *platform, const char *name,
 238                 const char *value)
 239 {
 240         struct param *param;
 241
 242         list_for_each_entry(&platform->params, param, list) {
 243                 if (strcmp(param->name, name))
 244                         continue;
 245
 246                 if (!strcmp(param->value, value))
 247                         return;
 248
 249                 talloc_free(param->value);
 250                 param->value = talloc_strdup(param, value);
 251                 param->modified = true;
 252                 return;
 253         }
 254
 255
 256         param = talloc(platform, struct param);
 257         param->modified = true;
 258         param->name = talloc_strdup(platform, name);
 259         param->value = talloc_strdup(platform, value);
 260         list_add(&platform->params, &param->list);
 261 }
 262
 263 static int parse_hwaddr(struct interface_config *ifconf, char *str)
 264 {
 265         int i;
 266
 267         if (strlen(str) != strlen("00:00:00:00:00:00"))
 268                 return -1;
 269
 270         for (i = 0; i < HWADDR_SIZE; i++) {
 271                 char byte[3], *endp;
 272                 unsigned long x;
 273
 274                 byte[0] = str[i * 3 + 0];
 275                 byte[1] = str[i * 3 + 1];
 276                 byte[2] = '\0';
 277
 278                 x = strtoul(byte, &endp, 16);
 279                 if (endp != byte + 2)
 280                         return -1;
 281
 282                 ifconf->hwaddr[i] = x & 0xff;
 283         }
 284
 285         return 0;
 286 }
 287
 288 static int parse_one_interface_config(struct config *config,
 289                 char *confstr)
 290 {
 291         struct interface_config *ifconf;
 292         char *tok, *saveptr;
 293
 294         ifconf = talloc_zero(config, struct interface_config);
 295
 296         if (!confstr || !strlen(confstr))
 297                 goto out_err;
 298
 299         /* first token should be the mac address */
 300         tok = strtok_r(confstr, ",", &saveptr);
 301         if (!tok)
 302                 goto out_err;
 303
 304         if (parse_hwaddr(ifconf, tok))
 305                 goto out_err;
 306
 307         /* second token is the method */
 308         tok = strtok_r(NULL, ",", &saveptr);
 309         if (!tok || !strlen(tok) || !strcmp(tok, "ignore")) {
 310                 ifconf->ignore = true;
 311
 312         } else if (!strcmp(tok, "dhcp")) {
 313                 ifconf->method = CONFIG_METHOD_DHCP;
 314
 315         } else if (!strcmp(tok, "static")) {
 316                 ifconf->method = CONFIG_METHOD_STATIC;
 317
 318                 /* ip/mask, [optional] gateway, [optional] url */
 319                 tok = strtok_r(NULL, ",", &saveptr);
 320                 if (!tok)
 321                         goto out_err;
 322                 ifconf->static_config.address =
 323                         talloc_strdup(ifconf, tok);
 324
 325                 tok = strtok_r(NULL, ",", &saveptr);
 326                 if (tok) {
 327                         ifconf->static_config.gateway =
 328                                 talloc_strdup(ifconf, tok);
 329                 }
 330
 331                 tok = strtok_r(NULL, ",", &saveptr);
 332                 if (tok) {
 333                         ifconf->static_config.url =
 334                                 talloc_strdup(ifconf, tok);
 335                 }
 336
 337         } else {
 338                 pb_log("Unknown network configuration method %s\n", tok);
 339                 goto out_err;
 340         }
 341
 342         config->network.interfaces = talloc_realloc(config,
 343                         config->network.interfaces,
 344                         struct interface_config *,
 345                         ++config->network.n_interfaces);
 346
 347         config->network.interfaces[config->network.n_interfaces - 1] = ifconf;
 348
 349         return 0;
 350 out_err:
 351         talloc_free(ifconf);
 352         return -1;
 353 }
 354
 355 static int parse_one_dns_config(struct config *config,
 356                 char *confstr)
 357 {
 358         char *tok, *saveptr = NULL;
 359
 360         for (tok = strtok_r(confstr, ",", &saveptr); tok;
 361                         tok = strtok_r(NULL, ",", &saveptr)) {
 362
 363                 char *server = talloc_strdup(config, tok);
 364
 365                 config->network.dns_servers = talloc_realloc(config,
 366                                 config->network.dns_servers, const char *,
 367                                 ++config->network.n_dns_servers);
 368
 369                 config->network.dns_servers[config->network.n_dns_servers - 1]
 370                                 = server;
 371         }
 372
 373         return 0;
 374 }
 375
 376 static void populate_network_config(struct platform_powerpc *platform,
 377                 struct config *config)
 378 {
 379         char *val, *saveptr = NULL;
 380         const char *cval;
 381         int i;
 382
 383         cval = get_param(platform, "petitboot,network");
 384         if (!cval || !strlen(cval))
 385                 return;
 386
 387         val = talloc_strdup(config, cval);
 388
 389         for (i = 0; ; i++) {
 390                 char *tok;
 391
 392                 tok = strtok_r(i == 0 ? val : NULL, " ", &saveptr);
 393                 if (!tok)
 394                         break;
 395
 396                 if (!strncasecmp(tok, "dns,", strlen("dns,")))
 397                         parse_one_dns_config(config, tok + strlen("dns,"));
 398                 else
 399                         parse_one_interface_config(config, tok);
 400
 401         }
 402
 403         talloc_free(val);
 404 }
 405
 406 static int read_bootdev(void *ctx, char **pos, struct autoboot_option *opt)
 407 {
 408         char *delim = strchr(*pos, ' ');
 409         int len, prefix = 0, rc = -1;
 410         enum device_type type;
 411
 412         if (!strncmp(*pos, "uuid:", strlen("uuid:"))) {
 413                 prefix = strlen("uuid:");
 414                 opt->boot_type = BOOT_DEVICE_UUID;
 415                 rc = 0;
 416         } else if (!strncmp(*pos, "mac:", strlen("mac:"))) {
 417                 prefix = strlen("mac:");
 418                 opt->boot_type = BOOT_DEVICE_UUID;
 419                 rc = 0;
 420         } else {
 421                 type = find_device_type(*pos);
 422                 if (type != DEVICE_TYPE_UNKNOWN) {
 423                         opt->type = type;
 424                         opt->boot_type = BOOT_DEVICE_TYPE;
 425                         rc = 0;
 426                 }
 427         }
 428
 429         if (opt->boot_type == BOOT_DEVICE_UUID) {
 430                 if (delim)
 431                         len = (int)(delim - *pos) - prefix;
 432                 else
 433                         len = strlen(*pos);
 434
 435                 opt->uuid = talloc_strndup(ctx, *pos + prefix, len);
 436         }
 437
 438         /* Always advance pointer to next option or end */
 439         if (delim)
 440                 *pos = delim + 1;
 441         else
 442                 *pos += strlen(*pos);
 443
 444         return rc;
 445 }
 446
 447 static void populate_bootdev_config(struct platform_powerpc *platform,
 448                 struct config *config)
 449 {
 450         struct autoboot_option *opt, *new = NULL;
 451         char *pos, *end, *old_dev = NULL;
 452         unsigned int n_new = 0;
 453         const char *val;
 454         bool conflict;
 455
 456         /* Check for old-style bootdev */
 457         val = get_param(platform, "petitboot,bootdev");
 458         if (val && strlen(val)) {
 459                 pos = talloc_strdup(config, val);
 460                 if (!strncmp(val, "uuid:", strlen("uuid:")))
 461                         old_dev = talloc_strdup(config,
 462                                                 val + strlen("uuid:"));
 463                 else if (!strncmp(val, "mac:", strlen("mac:")))
 464                         old_dev = talloc_strdup(config,
 465                                                 val + strlen("mac:"));
 466         }
 467
 468         /* Check for ordered bootdevs */
 469         val = get_param(platform, "petitboot,bootdevs");
 470         if (!val || !strlen(val)) {
 471                 pos = end = NULL;
 472         } else {
 473                 pos = talloc_strdup(config, val);
 474                 end = strchr(pos, '\0');
 475         }
 476
 477         while (pos && pos < end) {
 478                 opt = talloc(config, struct autoboot_option);
 479
 480                 if (read_bootdev(config, &pos, opt)) {
 481                         pb_log("bootdev config is in an unknown format "
 482                                "(expected uuid:... or mac:...)\n");
 483                         talloc_free(opt);
 484                         continue;
 485                 }
 486
 487                 new = talloc_realloc(config, new, struct autoboot_option,
 488                                      n_new + 1);
 489                 new[n_new] = *opt;
 490                 n_new++;
 491                 talloc_free(opt);
 492
 493         }
 494
 495         if (!n_new && !old_dev) {
 496                 /* If autoboot has been disabled, clear the default options */
 497                 if (!config->autoboot_enabled) {
 498                         talloc_free(config->autoboot_opts);
 499                         config->n_autoboot_opts = 0;
 500                 }
 501                 return;
 502         }
 503
 504         conflict = old_dev && (!n_new ||
 505                                     new[0].boot_type == BOOT_DEVICE_TYPE ||
 506                                     /* Canonical UUIDs are 36 characters long */
 507                                     strncmp(new[0].uuid, old_dev, 36));
 508
 509         if (!conflict) {
 510                 talloc_free(config->autoboot_opts);
 511                 config->autoboot_opts = new;
 512                 config->n_autoboot_opts = n_new;
 513                 return;
 514         }
 515
 516         /*
 517          * Difference detected, defer to old format in case it has been updated
 518          * recently
 519          */
 520         pb_debug("Old autoboot bootdev detected\n");
 521         talloc_free(config->autoboot_opts);
 522         config->autoboot_opts = talloc(config, struct autoboot_option);
 523         config->autoboot_opts[0].boot_type = BOOT_DEVICE_UUID;
 524         config->autoboot_opts[0].uuid = talloc_strdup(config, old_dev);
 525         config->n_autoboot_opts = 1;
 526 }
 527
 528 static void populate_config(struct platform_powerpc *platform,
 529                 struct config *config)
 530 {
 531         const char *val;
 532         char *end;
 533         unsigned long timeout;
 534
 535         /* if the "auto-boot?' property is present and "false", disable auto
 536          * boot */
 537         val = get_param(platform, "auto-boot?");
 538         config->autoboot_enabled = !val || strcmp(val, "false");
 539
 540         val = get_param(platform, "petitboot,timeout");
 541         if (val) {
 542                 timeout = strtoul(val, &end, 10);
 543                 if (end != val) {
 544                         if (timeout >= INT_MAX)
 545                                 timeout = INT_MAX;
 546                         config->autoboot_timeout_sec = (int)timeout;
 547                 }
 548         }
 549
 550         val = get_param(platform, "petitboot,language");
 551         config->lang = val ? talloc_strdup(config, val) : NULL;
 552
 553         populate_network_config(platform, config);
 554
 555         populate_bootdev_config(platform, config);
 556
 557         if (!config->debug) {
 558                 val = get_param(platform, "petitboot,debug?");
 559                 config->debug = val && !strcmp(val, "true");
 560         }
 561
 562         val = get_param(platform, "petitboot,write?");
 563         if (val)
 564                 config->allow_writes = !strcmp(val, "true");
 565
 566         val = get_param(platform, "petitboot,snapshots?");
 567         if (val)
 568                 config->disable_snapshots = !strcmp(val, "false");
 569
 570         val = get_param(platform, "petitboot,tty");
 571         if (val)
 572                 config->boot_tty = talloc_strdup(config, val);
 573 }
 574
 575 static char *iface_config_str(void *ctx, struct interface_config *config)
 576 {
 577         char *str;
 578
 579         /* todo: HWADDR size is hardcoded as 6, but we may need to handle
 580          * different hardware address formats */
 581         str = talloc_asprintf(ctx, "%02x:%02x:%02x:%02x:%02x:%02x,",
 582                         config->hwaddr[0], config->hwaddr[1],
 583                         config->hwaddr[2], config->hwaddr[3],
 584                         config->hwaddr[4], config->hwaddr[5]);
 585
 586         if (config->ignore) {
 587                 str = talloc_asprintf_append(str, "ignore");
 588
 589         } else if (config->method == CONFIG_METHOD_DHCP) {
 590                 str = talloc_asprintf_append(str, "dhcp");
 591
 592         } else if (config->method == CONFIG_METHOD_STATIC) {
 593                 str = talloc_asprintf_append(str, "static,%s%s%s%s%s",
 594                                 config->static_config.address,
 595                                 config->static_config.gateway ? "," : "",
 596                                 config->static_config.gateway ?: "",
 597                                 config->static_config.url ? "," : "",
 598                                 config->static_config.url ?: "");
 599         }
 600         return str;
 601 }
 602
 603 static char *dns_config_str(void *ctx, const char **dns_servers, int n)
 604 {
 605         char *str;
 606         int i;
 607
 608         str = talloc_strdup(ctx, "dns,");
 609         for (i = 0; i < n; i++) {
 610                 str = talloc_asprintf_append(str, "%s%s",
 611                                 i == 0 ? "" : ",",
 612                                 dns_servers[i]);
 613         }
 614
 615         return str;
 616 }
 617
 618 static void update_string_config(struct platform_powerpc *platform,
 619                 const char *name, const char *value)
 620 {
 621         const char *cur;
 622
 623         cur = get_param(platform, name);
 624
 625         /* don't set an empty parameter if it doesn't already exist */
 626         if (!cur && !strlen(value))
 627                 return;
 628
 629         set_param(platform, name, value);
 630 }
 631
 632 static void update_network_config(struct platform_powerpc *platform,
 633         struct config *config)
 634 {
 635         unsigned int i;
 636         char *val;
 637
 638         val = talloc_strdup(platform, "");
 639
 640         for (i = 0; i < config->network.n_interfaces; i++) {
 641                 char *iface_str = iface_config_str(platform,
 642                                         config->network.interfaces[i]);
 643                 val = talloc_asprintf_append(val, "%s%s",
 644                                 *val == '\0' ? "" : " ", iface_str);
 645                 talloc_free(iface_str);
 646         }
 647
 648         if (config->network.n_dns_servers) {
 649                 char *dns_str = dns_config_str(platform,
 650                                                 config->network.dns_servers,
 651                                                 config->network.n_dns_servers);
 652                 val = talloc_asprintf_append(val, "%s%s",
 653                                 *val == '\0' ? "" : " ", dns_str);
 654                 talloc_free(dns_str);
 655         }
 656
 657         update_string_config(platform, "petitboot,network", val);
 658
 659         talloc_free(val);
 660 }
 661
 662 static void update_bootdev_config(struct platform_powerpc *platform,
 663                 struct config *config)
 664 {
 665         char *val = NULL, *boot_str = NULL, *tmp = NULL, *first = NULL;
 666         struct autoboot_option *opt;
 667         const char delim = ' ';
 668         unsigned int i;
 669
 670         if (!config->n_autoboot_opts)
 671                 first = val = "";
 672         else if (config->autoboot_opts[0].boot_type == BOOT_DEVICE_UUID)
 673                 first = talloc_asprintf(config, "uuid:%s",
 674                                         config->autoboot_opts[0].uuid);
 675         else
 676                 first = "";
 677
 678         for (i = 0; i < config->n_autoboot_opts; i++) {
 679                 opt = &config->autoboot_opts[i];
 680                 switch (opt->boot_type) {
 681                         case BOOT_DEVICE_TYPE:
 682                                 boot_str = talloc_asprintf(config, "%s%c",
 683                                                 device_type_name(opt->type),
 684                                                 delim);
 685                                 break;
 686                         case BOOT_DEVICE_UUID:
 687                                 boot_str = talloc_asprintf(config, "uuid:%s%c",
 688                                                 opt->uuid, delim);
 689                                 break;
 690                         }
 691                         tmp = val = talloc_asprintf_append(val, "%s", boot_str);
 692         }
 693
 694         update_string_config(platform, "petitboot,bootdevs", val);
 695         update_string_config(platform, "petitboot,bootdev", first);
 696         talloc_free(tmp);
 697         if (boot_str)
 698                 talloc_free(boot_str);
 699 }
 700
 701 static int update_config(struct platform_powerpc *platform,
 702                 struct config *config, struct config *defaults)
 703 {
 704         char *tmp = NULL;
 705         const char *val;
 706
 707         if (config->autoboot_enabled == defaults->autoboot_enabled)
 708                 val = "";
 709         else
 710                 val = config->autoboot_enabled ? "true" : "false";
 711         update_string_config(platform, "auto-boot?", val);
 712
 713         if (config->autoboot_timeout_sec == defaults->autoboot_timeout_sec)
 714                 val = "";
 715         else
 716                 val = tmp = talloc_asprintf(platform, "%d",
 717                                 config->autoboot_timeout_sec);
 718
 719         if (config->ipmi_bootdev == IPMI_BOOTDEV_INVALID &&
 720             platform->clear_ipmi_bootdev) {
 721                 platform->clear_ipmi_bootdev(platform,
 722                                 config->ipmi_bootdev_persistent);
 723                 config->ipmi_bootdev = IPMI_BOOTDEV_NONE;
 724                 config->ipmi_bootdev_persistent = false;
 725         }
 726
 727         update_string_config(platform, "petitboot,timeout", val);
 728         if (tmp)
 729                 talloc_free(tmp);
 730
 731         val = config->lang ?: "";
 732         update_string_config(platform, "petitboot,language", val);
 733
 734         if (config->allow_writes == defaults->allow_writes)
 735                 val = "";
 736         else
 737                 val = config->allow_writes ? "true" : "false";
 738         update_string_config(platform, "petitboot,write?", val);
 739
 740         val = config->boot_tty ?: "";
 741         update_string_config(platform, "petitboot,tty", val);
 742
 743         update_network_config(platform, config);
 744
 745         update_bootdev_config(platform, config);
 746
 747         return write_nvram(platform);
 748 }
 749
 750 static void set_ipmi_bootdev(struct config *config, enum ipmi_bootdev bootdev,
 751                 bool persistent)
 752 {
 753         config->ipmi_bootdev = bootdev;
 754         config->ipmi_bootdev_persistent = persistent;
 755
 756         switch (bootdev) {
 757         case IPMI_BOOTDEV_NONE:
 758         case IPMI_BOOTDEV_DISK:
 759         case IPMI_BOOTDEV_NETWORK:
 760         case IPMI_BOOTDEV_CDROM:
 761         default:
 762                 break;
 763         case IPMI_BOOTDEV_SETUP:
 764                 config->autoboot_enabled = false;
 765                 break;
 766         case IPMI_BOOTDEV_SAFE:
 767                 config->autoboot_enabled = false;
 768                 config->safe_mode = true;
 769                 break;
 770         }
 771 }
 772
 773 static int read_bootdev_sysparam(const char *name, uint8_t *val)
 774 {
 775         uint8_t buf[2];
 776         char path[50];
 777         int fd, rc;
 778
 779         assert(strlen(sysparams_dir) + strlen(name) < sizeof(path));
 780         snprintf(path, sizeof(path), "%s%s", sysparams_dir, name);
 781
 782         fd = open(path, O_RDONLY);
 783         if (fd < 0) {
 784                 pb_debug("powerpc: can't access sysparam %s\n",
 785                                 name);
 786                 return -1;
 787         }
 788
 789         rc = read(fd, buf, sizeof(buf));
 790
 791         close(fd);
 792
 793         /* bootdev definitions should only be one byte in size */
 794         if (rc != 1) {
 795                 pb_debug("powerpc: sysparam %s read returned %d\n",
 796                                 name, rc);
 797                 return -1;
 798         }
 799
 800         pb_debug("powerpc: sysparam %s: 0x%02x\n", name, buf[0]);
 801
 802         if (!ipmi_bootdev_is_valid(buf[0]))
 803                 return -1;
 804
 805         *val = buf[0];
 806         return 0;
 807 }
 808
 809 static int write_bootdev_sysparam(const char *name, uint8_t val)
 810 {
 811         char path[50];
 812         int fd, rc;
 813
 814         assert(strlen(sysparams_dir) + strlen(name) < sizeof(path));
 815         snprintf(path, sizeof(path), "%s%s", sysparams_dir, name);
 816
 817         fd = open(path, O_WRONLY);
 818         if (fd < 0) {
 819                 pb_debug("powerpc: can't access sysparam %s for writing\n",
 820                                 name);
 821                 return -1;
 822         }
 823
 824         for (;;) {
 825                 errno = 0;
 826                 rc = write(fd, &val, sizeof(val));
 827                 if (rc == sizeof(val)) {
 828                         rc = 0;
 829                         break;
 830                 }
 831
 832                 if (rc <= 0 && errno != EINTR) {
 833                         pb_log("powerpc: error updating sysparam %s: %s",
 834                                         name, strerror(errno));
 835                         rc = -1;
 836                         break;
 837                 }
 838         }
 839
 840         close(fd);
 841
 842         if (!rc)
 843                 pb_debug("powerpc: set sysparam %s: 0x%02x\n", name, val);
 844
 845         return rc;
 846 }
 847
 848 static int clear_ipmi_bootdev_sysparams(
 849                 struct platform_powerpc *platform __attribute__((unused)),
 850                 bool persistent)
 851 {
 852         if (persistent) {
 853                 /* invalidate default-boot-device setting */
 854                 write_bootdev_sysparam("default-boot-device", 0xff);
 855         } else {
 856                 /* invalidate next-boot-device setting */
 857                 write_bootdev_sysparam("next-boot-device", 0xff);
 858         }
 859         return 0;
 860 }
 861
 862 static int get_ipmi_bootdev_sysparams(
 863                 struct platform_powerpc *platform __attribute__((unused)),
 864                 uint8_t *bootdev, bool *persistent)
 865 {
 866         uint8_t next_bootdev, default_bootdev;
 867         bool next_valid, default_valid;
 868         int rc;
 869
 870         rc = read_bootdev_sysparam("next-boot-device", &next_bootdev);
 871         next_valid = rc == 0;
 872
 873         rc = read_bootdev_sysparam("default-boot-device", &default_bootdev);
 874         default_valid = rc == 0;
 875
 876         /* nothing valid? no need to change the config */
 877         if (!next_valid && !default_valid)
 878                 return -1;
 879
 880         *persistent = !next_valid;
 881         *bootdev = next_valid ? next_bootdev : default_bootdev;
 882         return 0;
 883 }
 884
 885 static int clear_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 886                                    bool persistent __attribute__((unused)))
 887 {
 888         uint16_t resp_len;
 889         uint8_t resp[1];
 890         uint8_t req[] = {
 891                 0x05, /* parameter selector: boot flags */
 892                 0x80, /* data 1: valid */
 893                 0x00, /* data 2: bootdev: no override */
 894                 0x00, /* data 3: system defaults */
 895                 0x00, /* data 4: no request for shared mode, mux defaults */
 896                 0x00, /* data 5: no instance request */
 897         };
 898
 899         resp_len = sizeof(resp);
 900
 901         ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 902                         IPMI_CMD_CHASSIS_SET_SYSTEM_BOOT_OPTIONS,
 903                         req, sizeof(req),
 904                         resp, &resp_len,
 905                         ipmi_timeout);
 906         return 0;
 907 }
 908
 909 static int get_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 910                 uint8_t *bootdev, bool *persistent)
 911 {
 912         uint16_t resp_len;
 913         uint8_t resp[8];
 914         int rc;
 915         uint8_t req[] = {
 916                 0x05, /* parameter selector: boot flags */
 917                 0x00, /* no set selector */
 918                 0x00, /* no block selector */
 919         };
 920
 921         resp_len = sizeof(resp);
 922         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 923                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
 924                         req, sizeof(req),
 925                         resp, &resp_len,
 926                         ipmi_timeout);
 927         if (rc) {
 928                 pb_log("platform: error reading IPMI boot options\n");
 929                 return -1;
 930         }
 931
 932         if (resp_len != sizeof(resp)) {
 933                 pb_log("platform: unexpected length (%d) in "
 934                                 "boot options response\n", resp_len);
 935                 return -1;
 936         }
 937
 938         pb_debug("IPMI get_bootdev response:\n");
 939         for (int i = 0; i < resp_len; i++)
 940                 pb_debug("%x ", resp[i]);
 941         pb_debug("\n");
 942
 943         if (resp[0] != 0) {
 944                 pb_log("platform: non-zero completion code %d from IPMI req\n",
 945                                 resp[0]);
 946                 return -1;
 947         }
 948
 949         /* check for correct parameter version */
 950         if ((resp[1] & 0xf) != 0x1) {
 951                 pb_log("platform: unexpected version (0x%x) in "
 952                                 "boot options response\n", resp[0]);
 953                 return -1;
 954         }
 955
 956         /* check for valid paramters */
 957         if (resp[2] & 0x80) {
 958                 pb_debug("platform: boot options are invalid/locked\n");
 959                 return -1;
 960         }
 961
 962         *persistent = false;
 963
 964         /* check for valid flags */
 965         if (!(resp[3] & 0x80)) {
 966                 pb_debug("platform: boot flags are invalid, ignoring\n");
 967                 return -1;
 968         }
 969
 970         *persistent = resp[3] & 0x40;
 971         *bootdev = (resp[4] >> 2) & 0x0f;
 972         return 0;
 973 }
 974
 975 static int set_ipmi_os_boot_sensor(struct platform_powerpc *platform)
 976 {
 977         int sensor_number;
 978         uint16_t resp_len;
 979         uint8_t resp[1];
 980         uint8_t req[] = {
 981                 0x00, /* sensor number: os boot */
 982                 0xA9, /* operation: set everything */
 983                 0x00, /* sensor reading: none */
 984                 0x40, /* assertion mask lsb: set state 6 */
 985                 0x00, /* assertion mask msb: none */
 986                 0x00, /* deassertion mask lsb: none */
 987                 0x00, /* deassertion mask msb: none */
 988                 0x00, /* event data 1: none */
 989                 0x00, /* event data 2: none */
 990                 0x00, /* event data 3: none */
 991         };
 992
 993         sensor_number = get_ipmi_sensor(platform, IPMI_SENSOR_ID_OS_BOOT);
 994         if (sensor_number < 0) {
 995                 pb_log("Couldn't find OS boot sensor in device tree\n");
 996                 return -1;
 997         }
 998
 999         req[0] = sensor_number;
1000
1001         resp_len = sizeof(resp);
1002
1003         ipmi_transaction(platform->ipmi, IPMI_NETFN_SE,
1004                         IPMI_CMD_SENSOR_SET,
1005                         req, sizeof(req),
1006                         resp, &resp_len,
1007                         ipmi_timeout); return 0;
1008
1009         return 0;
1010 }
1011
1012 static void get_ipmi_bmc_mac(struct platform *p, uint8_t *buf)
1013 {
1014         struct platform_powerpc *platform = p->platform_data;
1015         uint16_t resp_len = 8;
1016         uint8_t resp[8];
1017         uint8_t req[] = { 0x1, 0x5, 0x0, 0x0 };
1018         int i, rc;
1019
1020         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_TRANSPORT,
1021                         IPMI_CMD_TRANSPORT_GET_LAN_PARAMS,
1022                         req, sizeof(req),
1023                         resp, &resp_len,
1024                         ipmi_timeout);
1025
1026         pb_debug("BMC MAC resp [%d][%d]:\n", rc, resp_len);
1027
1028         if (rc == 0 && resp_len > 0) {
1029                 for (i = 2; i < resp_len; i++) {
1030                         pb_debug(" %x", resp[i]);
1031                         buf[i - 2] = resp[i];
1032                 }
1033                 pb_debug("\n");
1034         }
1035
1036 }
1037
1038 /*
1039  * Retrieve info from the "Get Device ID" IPMI commands.
1040  * See Chapter 20.1 in the IPMIv2 specification.
1041  */
1042 static void get_ipmi_bmc_versions(struct platform *p, struct system_info *info)
1043 {
1044         struct platform_powerpc *platform = p->platform_data;
1045         uint16_t resp_len = 16;
1046         uint8_t resp[16], bcd;
1047         uint32_t aux_version;
1048         int i, rc;
1049
1050         /* Retrieve info from current side */
1051         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_APP,
1052                         IPMI_CMD_APP_GET_DEVICE_ID,
1053                         NULL, 0,
1054                         resp, &resp_len,
1055                         ipmi_timeout);
1056
1057         pb_debug("BMC version resp [%d][%d]:\n", rc, resp_len);
1058         if (resp_len > 0) {
1059                 for (i = 0; i < resp_len; i++) {
1060                         pb_debug(" %x", resp[i]);
1061                 }
1062                 pb_debug("\n");
1063         }
1064
1065         if (rc == 0 && resp_len == 16) {
1066                 info->bmc_current = talloc_array(info, char *, 4);
1067                 info->n_bmc_current = 4;
1068
1069                 info->bmc_current[0] = talloc_asprintf(info, "Device ID: 0x%x",
1070                                                 resp[1]);
1071                 info->bmc_current[1] = talloc_asprintf(info, "Device Rev: 0x%x",
1072                                                 resp[2]);
1073                 bcd = resp[4] & 0x0f;
1074                 bcd += 10 * (resp[4] >> 4);
1075                 memcpy(&aux_version, &resp[12], sizeof(aux_version));
1076                 info->bmc_current[2] = talloc_asprintf(info,
1077                                                 "Firmware version: %u.%02u.%05u",
1078                                                 resp[3], bcd, aux_version);
1079                 bcd = resp[5] & 0x0f;
1080                 bcd += 10 * (resp[5] >> 4);
1081                 info->bmc_current[3] = talloc_asprintf(info, "IPMI version: %u",
1082                                                 bcd);
1083         } else
1084                 pb_log("Failed to retrieve Device ID from IPMI\n");
1085
1086         /* Retrieve info from golden side */
1087         memset(resp, 0, sizeof(resp));
1088         resp_len = 16;
1089         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_AMI,
1090                         IPMI_CMD_APP_GET_DEVICE_ID_GOLDEN,
1091                         NULL, 0,
1092                         resp, &resp_len,
1093                         ipmi_timeout);
1094
1095         pb_debug("BMC golden resp [%d][%d]:\n", rc, resp_len);
1096         if (resp_len > 0) {
1097                 for (i = 0; i < resp_len; i++) {
1098                         pb_debug(" %x", resp[i]);
1099                 }
1100                 pb_debug("\n");
1101         }
1102
1103         if (rc == 0 && resp_len == 16) {
1104                 info->bmc_golden = talloc_array(info, char *, 4);
1105                 info->n_bmc_golden = 4;
1106
1107                 info->bmc_golden[0] = talloc_asprintf(info, "Device ID: 0x%x",
1108                                                 resp[1]);
1109                 info->bmc_golden[1] = talloc_asprintf(info, "Device Rev: 0x%x",
1110                                                 resp[2]);
1111                 bcd = resp[4] & 0x0f;
1112                 bcd += 10 * (resp[4] >> 4);
1113                 memcpy(&aux_version, &resp[12], sizeof(aux_version));
1114                 info->bmc_golden[2] = talloc_asprintf(info,
1115                                                 "Firmware version: %u.%02u.%u",
1116                                                 resp[3], bcd, aux_version);
1117                 bcd = resp[5] & 0x0f;
1118                 bcd += 10 * (resp[5] >> 4);
1119                 info->bmc_golden[3] = talloc_asprintf(info, "IPMI version: %u",
1120                                                 bcd);
1121         } else
1122                 pb_log("Failed to retrieve Golden Device ID from IPMI\n");
1123 }
1124
1125 static void get_ipmi_network_override(struct platform_powerpc *platform,
1126                         struct config *config)
1127 {
1128         uint16_t min_len = 12, resp_len = 53, version;
1129         const uint32_t magic_value = 0x21706221;
1130         uint8_t resp[resp_len];
1131         uint32_t cookie;
1132         bool persistent;
1133         int i, rc;
1134         uint8_t req[] = {
1135                 0x61, /* parameter selector: OEM section (network) */
1136                 0x00, /* no set selector */
1137                 0x00, /* no block selector */
1138         };
1139
1140         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
1141                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
1142                         req, sizeof(req),
1143                         resp, &resp_len,
1144                         ipmi_timeout);
1145
1146         pb_debug("IPMI net override resp [%d][%d]:\n", rc, resp_len);
1147         if (resp_len > 0) {
1148                 for (i = 0; i < resp_len; i++) {
1149                         pb_debug(" %02x", resp[i]);
1150                         if (i && (i + 1) % 16 == 0 && i != resp_len - 1)
1151                                 pb_debug("\n");
1152                         else if (i && (i + 1) % 8 == 0)
1153                                 pb_debug(" ");
1154                 }
1155                 pb_debug("\n");
1156         }
1157
1158         if (rc) {
1159                 pb_debug("IPMI network config option unavailable\n");
1160                 return;
1161         }
1162
1163         if (resp_len < min_len) {
1164                 pb_debug("IPMI net response too small\n");
1165                 return;
1166         }
1167
1168         if (resp[0] != 0) {
1169                 pb_log("platform: non-zero completion code %d from IPMI network req\n",
1170                        resp[0]);
1171                 return;
1172         }
1173
1174         /* Check for correct parameter version */
1175         if ((resp[1] & 0xf) != 0x1) {
1176                 pb_log("platform: unexpected version (0x%x) in network override response\n",
1177                        resp[0]);
1178                 return;
1179         }
1180
1181         /* Check that the parameters are valid */
1182         if (resp[2] & 0x80) {
1183                 pb_debug("platform: network override is invalid/locked\n");
1184                 return;
1185         }
1186
1187         /* Check for valid parameters in the boot flags section */
1188         if (!(resp[3] & 0x80)) {
1189                 pb_debug("platform: network override valid flag not set\n");
1190                 return;
1191         }
1192         /* Read the persistent flag; if it is set we need to save this config */
1193         persistent = resp[3] & 0x40;
1194         if (persistent)
1195                 pb_debug("platform: network override is persistent\n");
1196
1197         /* Check 4-byte cookie value */
1198         i = 4;
1199         memcpy(&cookie, &resp[i], sizeof(cookie));
1200         cookie = __be32_to_cpu(cookie);
1201         if (cookie != magic_value) {
1202                 pb_log("%s: Incorrect cookie %x\n", __func__, cookie);
1203                 return;
1204         }
1205         i += sizeof(cookie);
1206
1207         /* Check 2-byte version number */
1208         memcpy(&version, &resp[i], sizeof(version));
1209         version = __be16_to_cpu(version);
1210         i += sizeof(version);
1211         if (version != 1) {
1212                 pb_debug("Unexpected version: %u\n", version);
1213                 return;
1214         }
1215
1216         /* Interpret the rest of the interface config */
1217         rc = parse_ipmi_interface_override(config, &resp[i], resp_len - i);
1218
1219         if (!rc && persistent) {
1220                 /* Write this new config to NVRAM */
1221                 update_network_config(platform, config);
1222                 rc = write_nvram(platform);
1223                 if (rc)
1224                         pb_log("platform: Failed to save persistent interface override\n");
1225         }
1226 }
1227
1228 static void get_active_consoles(struct config *config)
1229 {
1230         struct stat sbuf;
1231         char *fsp_prop = NULL;
1232
1233         config->n_tty = 2;
1234         config->tty_list = talloc_array(config, char *, config->n_tty);
1235         if (!config->tty_list)
1236                 goto err;
1237
1238         config->tty_list[0] = talloc_asprintf(config->tty_list,
1239                                         "/dev/hvc0 [IPMI / Serial]");
1240         config->tty_list[1] = talloc_asprintf(config->tty_list,
1241                                         "/dev/tty1 [VGA]");
1242
1243         fsp_prop = talloc_asprintf(config, "%sfsps", devtree_dir);
1244         if (stat(fsp_prop, &sbuf) == 0) {
1245                 /* FSP based machines also have a separate serial console */
1246                 config->tty_list = talloc_realloc(config, config->tty_list,
1247                                                 char *, config->n_tty + 1);
1248                 if (!config->tty_list)
1249                         goto err;
1250                 config->tty_list[config->n_tty++] = talloc_asprintf(
1251                                                 config->tty_list,
1252                                                 "/dev/hvc1 [Serial]");
1253         }
1254
1255         return;
1256 err:
1257         config->n_tty = 0;
1258         pb_log("Failed to allocate memory for tty_list\n");
1259 }
1260
1261 static int load_config(struct platform *p, struct config *config)
1262 {
1263         struct platform_powerpc *platform = to_platform_powerpc(p);
1264         int rc;
1265
1266         rc = parse_nvram(platform);
1267         if (rc)
1268                 return rc;
1269
1270         populate_config(platform, config);
1271
1272         if (platform->get_ipmi_bootdev) {
1273                 bool bootdev_persistent;
1274                 uint8_t bootdev = IPMI_BOOTDEV_INVALID;
1275                 rc = platform->get_ipmi_bootdev(platform, &bootdev,
1276                                 &bootdev_persistent);
1277                 if (!rc && ipmi_bootdev_is_valid(bootdev)) {
1278                         set_ipmi_bootdev(config, bootdev, bootdev_persistent);
1279                 }
1280         }
1281
1282         if (platform->ipmi)
1283                 get_ipmi_network_override(platform, config);
1284
1285         get_active_consoles(config);
1286
1287         return 0;
1288 }
1289
1290 static int save_config(struct platform *p, struct config *config)
1291 {
1292         struct platform_powerpc *platform = to_platform_powerpc(p);
1293         struct config *defaults;
1294         int rc;
1295
1296         defaults = talloc_zero(platform, struct config);
1297         config_set_defaults(defaults);
1298
1299         rc = update_config(platform, config, defaults);
1300
1301         talloc_free(defaults);
1302         return rc;
1303 }
1304
1305 static void pre_boot(struct platform *p, const struct config *config)
1306 {
1307         struct platform_powerpc *platform = to_platform_powerpc(p);
1308
1309         if (!config->ipmi_bootdev_persistent && platform->clear_ipmi_bootdev)
1310                 platform->clear_ipmi_bootdev(platform, false);
1311
1312         if (platform->set_os_boot_sensor)
1313                 platform->set_os_boot_sensor(platform);
1314 }
1315
1316 static int get_sysinfo(struct platform *p, struct system_info *sysinfo)
1317 {
1318         struct platform_powerpc *platform = p->platform_data;
1319         char *buf, *filename;
1320         int len, rc;
1321
1322         filename = talloc_asprintf(platform, "%smodel", devtree_dir);
1323         rc = read_file(platform, filename, &buf, &len);
1324         if (rc == 0)
1325                 sysinfo->type = talloc_steal(sysinfo, buf);
1326         talloc_free(filename);
1327
1328         filename = talloc_asprintf(platform, "%ssystem-id", devtree_dir);
1329         rc = read_file(platform, filename, &buf, &len);
1330         if (rc == 0)
1331                 sysinfo->identifier = talloc_steal(sysinfo, buf);
1332         talloc_free(filename);
1333
1334         sysinfo->bmc_mac = talloc_zero_size(sysinfo, HWADDR_SIZE);
1335         if (platform->ipmi)
1336                 get_ipmi_bmc_mac(p, sysinfo->bmc_mac);
1337
1338         if (platform->ipmi)
1339                 get_ipmi_bmc_versions(p, sysinfo);
1340
1341         if (platform->get_platform_versions)
1342                 platform->get_platform_versions(sysinfo);
1343
1344         return 0;
1345 }
1346
1347 static bool probe(struct platform *p, void *ctx)
1348 {
1349         struct platform_powerpc *platform;
1350         struct stat statbuf;
1351         int rc;
1352
1353         /* we need a device tree */
1354         rc = stat("/proc/device-tree", &statbuf);
1355         if (rc)
1356                 return false;
1357
1358         if (!S_ISDIR(statbuf.st_mode))
1359                 return false;
1360
1361         platform = talloc_zero(ctx, struct platform_powerpc);
1362         list_init(&platform->params);
1363
1364         p->platform_data = platform;
1365
1366         if (ipmi_present()) {
1367                 pb_debug("platform: using direct IPMI for IPMI paramters\n");
1368                 platform->ipmi = ipmi_open(platform);
1369                 platform->get_ipmi_bootdev = get_ipmi_bootdev_ipmi;
1370                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_ipmi;
1371                 platform->set_os_boot_sensor = set_ipmi_os_boot_sensor;
1372         } else if (!stat(sysparams_dir, &statbuf)) {
1373                 pb_debug("platform: using sysparams for IPMI paramters\n");
1374                 platform->get_ipmi_bootdev = get_ipmi_bootdev_sysparams;
1375                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_sysparams;
1376
1377         } else {
1378                 pb_log("platform: no IPMI parameter support\n");
1379         }
1380
1381         rc = stat("/proc/device-tree/bmc", &statbuf);
1382         if (!rc)
1383                 platform->get_platform_versions = hostboot_load_versions;
1384
1385         return true;
1386 }
1387
1388
1389 static struct platform platform_powerpc = {
1390         .name                   = "powerpc",
1391         .dhcp_arch_id           = 0x000e,
1392         .probe                  = probe,
1393         .load_config            = load_config,
1394         .save_config            = save_config,
1395         .pre_boot               = pre_boot,
1396         .get_sysinfo            = get_sysinfo,
1397 };
1398
1399 register_platform(platform_powerpc);