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,console",
  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,console");
 571         if (val)
 572                 config->boot_console = talloc_strdup(config, val);
 573         /* If a full path is already set we don't want to override it */
 574         config->manual_console = config->boot_console &&
 575                                         !strchr(config->boot_console, '[');
 576 }
 577
 578 static char *iface_config_str(void *ctx, struct interface_config *config)
 579 {
 580         char *str;
 581
 582         /* todo: HWADDR size is hardcoded as 6, but we may need to handle
 583          * different hardware address formats */
 584         str = talloc_asprintf(ctx, "%02x:%02x:%02x:%02x:%02x:%02x,",
 585                         config->hwaddr[0], config->hwaddr[1],
 586                         config->hwaddr[2], config->hwaddr[3],
 587                         config->hwaddr[4], config->hwaddr[5]);
 588
 589         if (config->ignore) {
 590                 str = talloc_asprintf_append(str, "ignore");
 591
 592         } else if (config->method == CONFIG_METHOD_DHCP) {
 593                 str = talloc_asprintf_append(str, "dhcp");
 594
 595         } else if (config->method == CONFIG_METHOD_STATIC) {
 596                 str = talloc_asprintf_append(str, "static,%s%s%s%s%s",
 597                                 config->static_config.address,
 598                                 config->static_config.gateway ? "," : "",
 599                                 config->static_config.gateway ?: "",
 600                                 config->static_config.url ? "," : "",
 601                                 config->static_config.url ?: "");
 602         }
 603         return str;
 604 }
 605
 606 static char *dns_config_str(void *ctx, const char **dns_servers, int n)
 607 {
 608         char *str;
 609         int i;
 610
 611         str = talloc_strdup(ctx, "dns,");
 612         for (i = 0; i < n; i++) {
 613                 str = talloc_asprintf_append(str, "%s%s",
 614                                 i == 0 ? "" : ",",
 615                                 dns_servers[i]);
 616         }
 617
 618         return str;
 619 }
 620
 621 static void update_string_config(struct platform_powerpc *platform,
 622                 const char *name, const char *value)
 623 {
 624         const char *cur;
 625
 626         cur = get_param(platform, name);
 627
 628         /* don't set an empty parameter if it doesn't already exist */
 629         if (!cur && !strlen(value))
 630                 return;
 631
 632         set_param(platform, name, value);
 633 }
 634
 635 static void update_network_config(struct platform_powerpc *platform,
 636         struct config *config)
 637 {
 638         unsigned int i;
 639         char *val;
 640
 641         /*
 642          * Don't store IPMI overrides to NVRAM. If this was a persistent
 643          * override it was already stored in NVRAM by
 644          * get_ipmi_network_override()
 645          */
 646         if (config->network.n_interfaces &&
 647                 config->network.interfaces[0]->override)
 648                 return;
 649
 650         val = talloc_strdup(platform, "");
 651
 652         for (i = 0; i < config->network.n_interfaces; i++) {
 653                 char *iface_str = iface_config_str(platform,
 654                                         config->network.interfaces[i]);
 655                 val = talloc_asprintf_append(val, "%s%s",
 656                                 *val == '\0' ? "" : " ", iface_str);
 657                 talloc_free(iface_str);
 658         }
 659
 660         if (config->network.n_dns_servers) {
 661                 char *dns_str = dns_config_str(platform,
 662                                                 config->network.dns_servers,
 663                                                 config->network.n_dns_servers);
 664                 val = talloc_asprintf_append(val, "%s%s",
 665                                 *val == '\0' ? "" : " ", dns_str);
 666                 talloc_free(dns_str);
 667         }
 668
 669         update_string_config(platform, "petitboot,network", val);
 670
 671         talloc_free(val);
 672 }
 673
 674 static void update_bootdev_config(struct platform_powerpc *platform,
 675                 struct config *config)
 676 {
 677         char *val = NULL, *boot_str = NULL, *tmp = NULL, *first = NULL;
 678         struct autoboot_option *opt;
 679         const char delim = ' ';
 680         unsigned int i;
 681
 682         if (!config->n_autoboot_opts)
 683                 first = val = "";
 684         else if (config->autoboot_opts[0].boot_type == BOOT_DEVICE_UUID)
 685                 first = talloc_asprintf(config, "uuid:%s",
 686                                         config->autoboot_opts[0].uuid);
 687         else
 688                 first = "";
 689
 690         for (i = 0; i < config->n_autoboot_opts; i++) {
 691                 opt = &config->autoboot_opts[i];
 692                 switch (opt->boot_type) {
 693                         case BOOT_DEVICE_TYPE:
 694                                 boot_str = talloc_asprintf(config, "%s%c",
 695                                                 device_type_name(opt->type),
 696                                                 delim);
 697                                 break;
 698                         case BOOT_DEVICE_UUID:
 699                                 boot_str = talloc_asprintf(config, "uuid:%s%c",
 700                                                 opt->uuid, delim);
 701                                 break;
 702                         }
 703                         tmp = val = talloc_asprintf_append(val, "%s", boot_str);
 704         }
 705
 706         update_string_config(platform, "petitboot,bootdevs", val);
 707         update_string_config(platform, "petitboot,bootdev", first);
 708         talloc_free(tmp);
 709         if (boot_str)
 710                 talloc_free(boot_str);
 711 }
 712
 713 static int update_config(struct platform_powerpc *platform,
 714                 struct config *config, struct config *defaults)
 715 {
 716         char *tmp = NULL;
 717         const char *val;
 718
 719         if (config->autoboot_enabled == defaults->autoboot_enabled)
 720                 val = "";
 721         else
 722                 val = config->autoboot_enabled ? "true" : "false";
 723         update_string_config(platform, "auto-boot?", val);
 724
 725         if (config->autoboot_timeout_sec == defaults->autoboot_timeout_sec)
 726                 val = "";
 727         else
 728                 val = tmp = talloc_asprintf(platform, "%d",
 729                                 config->autoboot_timeout_sec);
 730
 731         if (config->ipmi_bootdev == IPMI_BOOTDEV_INVALID &&
 732             platform->clear_ipmi_bootdev) {
 733                 platform->clear_ipmi_bootdev(platform,
 734                                 config->ipmi_bootdev_persistent);
 735                 config->ipmi_bootdev = IPMI_BOOTDEV_NONE;
 736                 config->ipmi_bootdev_persistent = false;
 737         }
 738
 739         update_string_config(platform, "petitboot,timeout", val);
 740         if (tmp)
 741                 talloc_free(tmp);
 742
 743         val = config->lang ?: "";
 744         update_string_config(platform, "petitboot,language", val);
 745
 746         if (config->allow_writes == defaults->allow_writes)
 747                 val = "";
 748         else
 749                 val = config->allow_writes ? "true" : "false";
 750         update_string_config(platform, "petitboot,write?", val);
 751
 752         if (!config->manual_console) {
 753                 val = config->boot_console ?: "";
 754                 update_string_config(platform, "petitboot,console", val);
 755         }
 756
 757         update_network_config(platform, config);
 758
 759         update_bootdev_config(platform, config);
 760
 761         return write_nvram(platform);
 762 }
 763
 764 static void set_ipmi_bootdev(struct config *config, enum ipmi_bootdev bootdev,
 765                 bool persistent)
 766 {
 767         config->ipmi_bootdev = bootdev;
 768         config->ipmi_bootdev_persistent = persistent;
 769
 770         switch (bootdev) {
 771         case IPMI_BOOTDEV_NONE:
 772         case IPMI_BOOTDEV_DISK:
 773         case IPMI_BOOTDEV_NETWORK:
 774         case IPMI_BOOTDEV_CDROM:
 775         default:
 776                 break;
 777         case IPMI_BOOTDEV_SETUP:
 778                 config->autoboot_enabled = false;
 779                 break;
 780         case IPMI_BOOTDEV_SAFE:
 781                 config->autoboot_enabled = false;
 782                 config->safe_mode = true;
 783                 break;
 784         }
 785 }
 786
 787 static int read_bootdev_sysparam(const char *name, uint8_t *val)
 788 {
 789         uint8_t buf[2];
 790         char path[50];
 791         int fd, rc;
 792
 793         assert(strlen(sysparams_dir) + strlen(name) < sizeof(path));
 794         snprintf(path, sizeof(path), "%s%s", sysparams_dir, name);
 795
 796         fd = open(path, O_RDONLY);
 797         if (fd < 0) {
 798                 pb_debug("powerpc: can't access sysparam %s\n",
 799                                 name);
 800                 return -1;
 801         }
 802
 803         rc = read(fd, buf, sizeof(buf));
 804
 805         close(fd);
 806
 807         /* bootdev definitions should only be one byte in size */
 808         if (rc != 1) {
 809                 pb_debug("powerpc: sysparam %s read returned %d\n",
 810                                 name, rc);
 811                 return -1;
 812         }
 813
 814         pb_debug("powerpc: sysparam %s: 0x%02x\n", name, buf[0]);
 815
 816         if (!ipmi_bootdev_is_valid(buf[0]))
 817                 return -1;
 818
 819         *val = buf[0];
 820         return 0;
 821 }
 822
 823 static int write_bootdev_sysparam(const char *name, uint8_t val)
 824 {
 825         char path[50];
 826         int fd, rc;
 827
 828         assert(strlen(sysparams_dir) + strlen(name) < sizeof(path));
 829         snprintf(path, sizeof(path), "%s%s", sysparams_dir, name);
 830
 831         fd = open(path, O_WRONLY);
 832         if (fd < 0) {
 833                 pb_debug("powerpc: can't access sysparam %s for writing\n",
 834                                 name);
 835                 return -1;
 836         }
 837
 838         for (;;) {
 839                 errno = 0;
 840                 rc = write(fd, &val, sizeof(val));
 841                 if (rc == sizeof(val)) {
 842                         rc = 0;
 843                         break;
 844                 }
 845
 846                 if (rc <= 0 && errno != EINTR) {
 847                         pb_log("powerpc: error updating sysparam %s: %s",
 848                                         name, strerror(errno));
 849                         rc = -1;
 850                         break;
 851                 }
 852         }
 853
 854         close(fd);
 855
 856         if (!rc)
 857                 pb_debug("powerpc: set sysparam %s: 0x%02x\n", name, val);
 858
 859         return rc;
 860 }
 861
 862 static int clear_ipmi_bootdev_sysparams(
 863                 struct platform_powerpc *platform __attribute__((unused)),
 864                 bool persistent)
 865 {
 866         if (persistent) {
 867                 /* invalidate default-boot-device setting */
 868                 write_bootdev_sysparam("default-boot-device", 0xff);
 869         } else {
 870                 /* invalidate next-boot-device setting */
 871                 write_bootdev_sysparam("next-boot-device", 0xff);
 872         }
 873         return 0;
 874 }
 875
 876 static int get_ipmi_bootdev_sysparams(
 877                 struct platform_powerpc *platform __attribute__((unused)),
 878                 uint8_t *bootdev, bool *persistent)
 879 {
 880         uint8_t next_bootdev, default_bootdev;
 881         bool next_valid, default_valid;
 882         int rc;
 883
 884         rc = read_bootdev_sysparam("next-boot-device", &next_bootdev);
 885         next_valid = rc == 0;
 886
 887         rc = read_bootdev_sysparam("default-boot-device", &default_bootdev);
 888         default_valid = rc == 0;
 889
 890         /* nothing valid? no need to change the config */
 891         if (!next_valid && !default_valid)
 892                 return -1;
 893
 894         *persistent = !next_valid;
 895         *bootdev = next_valid ? next_bootdev : default_bootdev;
 896         return 0;
 897 }
 898
 899 static int clear_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 900                                    bool persistent __attribute__((unused)))
 901 {
 902         uint16_t resp_len;
 903         uint8_t resp[1];
 904         uint8_t req[] = {
 905                 0x05, /* parameter selector: boot flags */
 906                 0x80, /* data 1: valid */
 907                 0x00, /* data 2: bootdev: no override */
 908                 0x00, /* data 3: system defaults */
 909                 0x00, /* data 4: no request for shared mode, mux defaults */
 910                 0x00, /* data 5: no instance request */
 911         };
 912
 913         resp_len = sizeof(resp);
 914
 915         ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 916                         IPMI_CMD_CHASSIS_SET_SYSTEM_BOOT_OPTIONS,
 917                         req, sizeof(req),
 918                         resp, &resp_len,
 919                         ipmi_timeout);
 920         return 0;
 921 }
 922
 923 static int get_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 924                 uint8_t *bootdev, bool *persistent)
 925 {
 926         uint16_t resp_len;
 927         uint8_t resp[8];
 928         int rc;
 929         uint8_t req[] = {
 930                 0x05, /* parameter selector: boot flags */
 931                 0x00, /* no set selector */
 932                 0x00, /* no block selector */
 933         };
 934
 935         resp_len = sizeof(resp);
 936         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 937                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
 938                         req, sizeof(req),
 939                         resp, &resp_len,
 940                         ipmi_timeout);
 941         if (rc) {
 942                 pb_log("platform: error reading IPMI boot options\n");
 943                 return -1;
 944         }
 945
 946         if (resp_len != sizeof(resp)) {
 947                 pb_log("platform: unexpected length (%d) in "
 948                                 "boot options response\n", resp_len);
 949                 return -1;
 950         }
 951
 952         pb_debug("IPMI get_bootdev response:\n");
 953         for (int i = 0; i < resp_len; i++)
 954                 pb_debug("%x ", resp[i]);
 955         pb_debug("\n");
 956
 957         if (resp[0] != 0) {
 958                 pb_log("platform: non-zero completion code %d from IPMI req\n",
 959                                 resp[0]);
 960                 return -1;
 961         }
 962
 963         /* check for correct parameter version */
 964         if ((resp[1] & 0xf) != 0x1) {
 965                 pb_log("platform: unexpected version (0x%x) in "
 966                                 "boot options response\n", resp[0]);
 967                 return -1;
 968         }
 969
 970         /* check for valid paramters */
 971         if (resp[2] & 0x80) {
 972                 pb_debug("platform: boot options are invalid/locked\n");
 973                 return -1;
 974         }
 975
 976         *persistent = false;
 977
 978         /* check for valid flags */
 979         if (!(resp[3] & 0x80)) {
 980                 pb_debug("platform: boot flags are invalid, ignoring\n");
 981                 return -1;
 982         }
 983
 984         *persistent = resp[3] & 0x40;
 985         *bootdev = (resp[4] >> 2) & 0x0f;
 986         return 0;
 987 }
 988
 989 static int set_ipmi_os_boot_sensor(struct platform_powerpc *platform)
 990 {
 991         int sensor_number;
 992         uint16_t resp_len;
 993         uint8_t resp[1];
 994         uint8_t req[] = {
 995                 0x00, /* sensor number: os boot */
 996                 0xA9, /* operation: set everything */
 997                 0x00, /* sensor reading: none */
 998                 0x40, /* assertion mask lsb: set state 6 */
 999                 0x00, /* assertion mask msb: none */
1000                 0x00, /* deassertion mask lsb: none */
1001                 0x00, /* deassertion mask msb: none */
1002                 0x00, /* event data 1: none */
1003                 0x00, /* event data 2: none */
1004                 0x00, /* event data 3: none */
1005         };
1006
1007         sensor_number = get_ipmi_sensor(platform, IPMI_SENSOR_ID_OS_BOOT);
1008         if (sensor_number < 0) {
1009                 pb_log("Couldn't find OS boot sensor in device tree\n");
1010                 return -1;
1011         }
1012
1013         req[0] = sensor_number;
1014
1015         resp_len = sizeof(resp);
1016
1017         ipmi_transaction(platform->ipmi, IPMI_NETFN_SE,
1018                         IPMI_CMD_SENSOR_SET,
1019                         req, sizeof(req),
1020                         resp, &resp_len,
1021                         ipmi_timeout); return 0;
1022
1023         return 0;
1024 }
1025
1026 static void get_ipmi_bmc_mac(struct platform *p, uint8_t *buf)
1027 {
1028         struct platform_powerpc *platform = p->platform_data;
1029         uint16_t resp_len = 8;
1030         uint8_t resp[8];
1031         uint8_t req[] = { 0x1, 0x5, 0x0, 0x0 };
1032         int i, rc;
1033
1034         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_TRANSPORT,
1035                         IPMI_CMD_TRANSPORT_GET_LAN_PARAMS,
1036                         req, sizeof(req),
1037                         resp, &resp_len,
1038                         ipmi_timeout);
1039
1040         pb_debug("BMC MAC resp [%d][%d]:\n", rc, resp_len);
1041
1042         if (rc == 0 && resp_len > 0) {
1043                 for (i = 2; i < resp_len; i++) {
1044                         pb_debug(" %x", resp[i]);
1045                         buf[i - 2] = resp[i];
1046                 }
1047                 pb_debug("\n");
1048         }
1049
1050 }
1051
1052 /*
1053  * Retrieve info from the "Get Device ID" IPMI commands.
1054  * See Chapter 20.1 in the IPMIv2 specification.
1055  */
1056 static void get_ipmi_bmc_versions(struct platform *p, struct system_info *info)
1057 {
1058         struct platform_powerpc *platform = p->platform_data;
1059         uint16_t resp_len = 16;
1060         uint8_t resp[16], bcd;
1061         uint32_t aux_version;
1062         int i, rc;
1063
1064         /* Retrieve info from current side */
1065         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_APP,
1066                         IPMI_CMD_APP_GET_DEVICE_ID,
1067                         NULL, 0,
1068                         resp, &resp_len,
1069                         ipmi_timeout);
1070
1071         pb_debug("BMC version resp [%d][%d]:\n", rc, resp_len);
1072         if (resp_len > 0) {
1073                 for (i = 0; i < resp_len; i++) {
1074                         pb_debug(" %x", resp[i]);
1075                 }
1076                 pb_debug("\n");
1077         }
1078
1079         if (rc == 0 && resp_len == 16) {
1080                 info->bmc_current = talloc_array(info, char *, 4);
1081                 info->n_bmc_current = 4;
1082
1083                 info->bmc_current[0] = talloc_asprintf(info, "Device ID: 0x%x",
1084                                                 resp[1]);
1085                 info->bmc_current[1] = talloc_asprintf(info, "Device Rev: 0x%x",
1086                                                 resp[2]);
1087                 bcd = resp[4] & 0x0f;
1088                 bcd += 10 * (resp[4] >> 4);
1089                 memcpy(&aux_version, &resp[12], sizeof(aux_version));
1090                 info->bmc_current[2] = talloc_asprintf(info,
1091                                                 "Firmware version: %u.%02u.%05u",
1092                                                 resp[3], bcd, aux_version);
1093                 bcd = resp[5] & 0x0f;
1094                 bcd += 10 * (resp[5] >> 4);
1095                 info->bmc_current[3] = talloc_asprintf(info, "IPMI version: %u",
1096                                                 bcd);
1097         } else
1098                 pb_log("Failed to retrieve Device ID from IPMI\n");
1099
1100         /* Retrieve info from golden side */
1101         memset(resp, 0, sizeof(resp));
1102         resp_len = 16;
1103         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_AMI,
1104                         IPMI_CMD_APP_GET_DEVICE_ID_GOLDEN,
1105                         NULL, 0,
1106                         resp, &resp_len,
1107                         ipmi_timeout);
1108
1109         pb_debug("BMC golden resp [%d][%d]:\n", rc, resp_len);
1110         if (resp_len > 0) {
1111                 for (i = 0; i < resp_len; i++) {
1112                         pb_debug(" %x", resp[i]);
1113                 }
1114                 pb_debug("\n");
1115         }
1116
1117         if (rc == 0 && resp_len == 16) {
1118                 info->bmc_golden = talloc_array(info, char *, 4);
1119                 info->n_bmc_golden = 4;
1120
1121                 info->bmc_golden[0] = talloc_asprintf(info, "Device ID: 0x%x",
1122                                                 resp[1]);
1123                 info->bmc_golden[1] = talloc_asprintf(info, "Device Rev: 0x%x",
1124                                                 resp[2]);
1125                 bcd = resp[4] & 0x0f;
1126                 bcd += 10 * (resp[4] >> 4);
1127                 memcpy(&aux_version, &resp[12], sizeof(aux_version));
1128                 info->bmc_golden[2] = talloc_asprintf(info,
1129                                                 "Firmware version: %u.%02u.%u",
1130                                                 resp[3], bcd, aux_version);
1131                 bcd = resp[5] & 0x0f;
1132                 bcd += 10 * (resp[5] >> 4);
1133                 info->bmc_golden[3] = talloc_asprintf(info, "IPMI version: %u",
1134                                                 bcd);
1135         } else
1136                 pb_log("Failed to retrieve Golden Device ID from IPMI\n");
1137 }
1138
1139 static void get_ipmi_network_override(struct platform_powerpc *platform,
1140                         struct config *config)
1141 {
1142         uint16_t min_len = 12, resp_len = 53, version;
1143         const uint32_t magic_value = 0x21706221;
1144         uint8_t resp[resp_len];
1145         uint32_t cookie;
1146         bool persistent;
1147         int i, rc;
1148         uint8_t req[] = {
1149                 0x61, /* parameter selector: OEM section (network) */
1150                 0x00, /* no set selector */
1151                 0x00, /* no block selector */
1152         };
1153
1154         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
1155                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
1156                         req, sizeof(req),
1157                         resp, &resp_len,
1158                         ipmi_timeout);
1159
1160         pb_debug("IPMI net override resp [%d][%d]:\n", rc, resp_len);
1161         if (resp_len > 0) {
1162                 for (i = 0; i < resp_len; i++) {
1163                         pb_debug(" %02x", resp[i]);
1164                         if (i && (i + 1) % 16 == 0 && i != resp_len - 1)
1165                                 pb_debug("\n");
1166                         else if (i && (i + 1) % 8 == 0)
1167                                 pb_debug(" ");
1168                 }
1169                 pb_debug("\n");
1170         }
1171
1172         if (rc) {
1173                 pb_debug("IPMI network config option unavailable\n");
1174                 return;
1175         }
1176
1177         if (resp_len < min_len) {
1178                 pb_debug("IPMI net response too small\n");
1179                 return;
1180         }
1181
1182         if (resp[0] != 0) {
1183                 pb_log("platform: non-zero completion code %d from IPMI network req\n",
1184                        resp[0]);
1185                 return;
1186         }
1187
1188         /* Check for correct parameter version */
1189         if ((resp[1] & 0xf) != 0x1) {
1190                 pb_log("platform: unexpected version (0x%x) in network override response\n",
1191                        resp[0]);
1192                 return;
1193         }
1194
1195         /* Check that the parameters are valid */
1196         if (resp[2] & 0x80) {
1197                 pb_debug("platform: network override is invalid/locked\n");
1198                 return;
1199         }
1200
1201         /* Check for valid parameters in the boot flags section */
1202         if (!(resp[3] & 0x80)) {
1203                 pb_debug("platform: network override valid flag not set\n");
1204                 return;
1205         }
1206         /* Read the persistent flag; if it is set we need to save this config */
1207         persistent = resp[3] & 0x40;
1208         if (persistent)
1209                 pb_debug("platform: network override is persistent\n");
1210
1211         /* Check 4-byte cookie value */
1212         i = 4;
1213         memcpy(&cookie, &resp[i], sizeof(cookie));
1214         cookie = __be32_to_cpu(cookie);
1215         if (cookie != magic_value) {
1216                 pb_log("%s: Incorrect cookie %x\n", __func__, cookie);
1217                 return;
1218         }
1219         i += sizeof(cookie);
1220
1221         /* Check 2-byte version number */
1222         memcpy(&version, &resp[i], sizeof(version));
1223         version = __be16_to_cpu(version);
1224         i += sizeof(version);
1225         if (version != 1) {
1226                 pb_debug("Unexpected version: %u\n", version);
1227                 return;
1228         }
1229
1230         /* Interpret the rest of the interface config */
1231         rc = parse_ipmi_interface_override(config, &resp[i], resp_len - i);
1232
1233         if (!rc && persistent) {
1234                 /* Write this new config to NVRAM */
1235                 update_network_config(platform, config);
1236                 rc = write_nvram(platform);
1237                 if (rc)
1238                         pb_log("platform: Failed to save persistent interface override\n");
1239         }
1240 }
1241
1242 static void get_active_consoles(struct config *config)
1243 {
1244         struct stat sbuf;
1245         char *fsp_prop = NULL;
1246
1247         config->n_consoles = 2;
1248         config->consoles = talloc_array(config, char *, config->n_consoles);
1249         if (!config->consoles)
1250                 goto err;
1251
1252         config->consoles[0] = talloc_asprintf(config->consoles,
1253                                         "/dev/hvc0 [IPMI / Serial]");
1254         config->consoles[1] = talloc_asprintf(config->consoles,
1255                                         "/dev/tty1 [VGA]");
1256
1257         fsp_prop = talloc_asprintf(config, "%sfsps", devtree_dir);
1258         if (stat(fsp_prop, &sbuf) == 0) {
1259                 /* FSP based machines also have a separate serial console */
1260                 config->consoles = talloc_realloc(config, config->consoles,
1261                                                 char *, config->n_consoles + 1);
1262                 if (!config->consoles)
1263                         goto err;
1264                 config->consoles[config->n_consoles++] = talloc_asprintf(
1265                                                 config->consoles,
1266                                                 "/dev/hvc1 [Serial]");
1267         }
1268
1269         return;
1270 err:
1271         config->n_consoles = 0;
1272         pb_log("Failed to allocate memory for consoles\n");
1273 }
1274
1275 static int load_config(struct platform *p, struct config *config)
1276 {
1277         struct platform_powerpc *platform = to_platform_powerpc(p);
1278         int rc;
1279
1280         rc = parse_nvram(platform);
1281         if (rc)
1282                 return rc;
1283
1284         populate_config(platform, config);
1285
1286         if (platform->get_ipmi_bootdev) {
1287                 bool bootdev_persistent;
1288                 uint8_t bootdev = IPMI_BOOTDEV_INVALID;
1289                 rc = platform->get_ipmi_bootdev(platform, &bootdev,
1290                                 &bootdev_persistent);
1291                 if (!rc && ipmi_bootdev_is_valid(bootdev)) {
1292                         set_ipmi_bootdev(config, bootdev, bootdev_persistent);
1293                 }
1294         }
1295
1296         if (platform->ipmi)
1297                 get_ipmi_network_override(platform, config);
1298
1299         get_active_consoles(config);
1300
1301         return 0;
1302 }
1303
1304 static int save_config(struct platform *p, struct config *config)
1305 {
1306         struct platform_powerpc *platform = to_platform_powerpc(p);
1307         struct config *defaults;
1308         int rc;
1309
1310         defaults = talloc_zero(platform, struct config);
1311         config_set_defaults(defaults);
1312
1313         rc = update_config(platform, config, defaults);
1314
1315         talloc_free(defaults);
1316         return rc;
1317 }
1318
1319 static void pre_boot(struct platform *p, const struct config *config)
1320 {
1321         struct platform_powerpc *platform = to_platform_powerpc(p);
1322
1323         if (!config->ipmi_bootdev_persistent && platform->clear_ipmi_bootdev)
1324                 platform->clear_ipmi_bootdev(platform, false);
1325
1326         if (platform->set_os_boot_sensor)
1327                 platform->set_os_boot_sensor(platform);
1328 }
1329
1330 static int get_sysinfo(struct platform *p, struct system_info *sysinfo)
1331 {
1332         struct platform_powerpc *platform = p->platform_data;
1333         char *buf, *filename;
1334         int len, rc;
1335
1336         filename = talloc_asprintf(platform, "%smodel", devtree_dir);
1337         rc = read_file(platform, filename, &buf, &len);
1338         if (rc == 0)
1339                 sysinfo->type = talloc_steal(sysinfo, buf);
1340         talloc_free(filename);
1341
1342         filename = talloc_asprintf(platform, "%ssystem-id", devtree_dir);
1343         rc = read_file(platform, filename, &buf, &len);
1344         if (rc == 0)
1345                 sysinfo->identifier = talloc_steal(sysinfo, buf);
1346         talloc_free(filename);
1347
1348         sysinfo->bmc_mac = talloc_zero_size(sysinfo, HWADDR_SIZE);
1349         if (platform->ipmi)
1350                 get_ipmi_bmc_mac(p, sysinfo->bmc_mac);
1351
1352         if (platform->ipmi)
1353                 get_ipmi_bmc_versions(p, sysinfo);
1354
1355         if (platform->get_platform_versions)
1356                 platform->get_platform_versions(sysinfo);
1357
1358         return 0;
1359 }
1360
1361 static bool probe(struct platform *p, void *ctx)
1362 {
1363         struct platform_powerpc *platform;
1364         struct stat statbuf;
1365         bool bmc_present;
1366         int rc;
1367
1368         /* we need a device tree */
1369         rc = stat("/proc/device-tree", &statbuf);
1370         if (rc)
1371                 return false;
1372
1373         if (!S_ISDIR(statbuf.st_mode))
1374                 return false;
1375
1376         platform = talloc_zero(ctx, struct platform_powerpc);
1377         list_init(&platform->params);
1378
1379         p->platform_data = platform;
1380
1381         bmc_present = stat("/proc/device-tree/bmc", &statbuf) == 0;
1382
1383         if (ipmi_present() && bmc_present) {
1384                 pb_debug("platform: using direct IPMI for IPMI paramters\n");
1385                 platform->ipmi = ipmi_open(platform);
1386                 platform->get_ipmi_bootdev = get_ipmi_bootdev_ipmi;
1387                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_ipmi;
1388                 platform->set_os_boot_sensor = set_ipmi_os_boot_sensor;
1389         } else if (!stat(sysparams_dir, &statbuf)) {
1390                 pb_debug("platform: using sysparams for IPMI paramters\n");
1391                 platform->get_ipmi_bootdev = get_ipmi_bootdev_sysparams;
1392                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_sysparams;
1393
1394         } else {
1395                 pb_log("platform: no IPMI parameter support\n");
1396         }
1397
1398         if (bmc_present)
1399                 platform->get_platform_versions = hostboot_load_versions;
1400
1401         return true;
1402 }
1403
1404
1405 static struct platform platform_powerpc = {
1406         .name                   = "powerpc",
1407         .dhcp_arch_id           = 0x000e,
1408         .probe                  = probe,
1409         .load_config            = load_config,
1410         .save_config            = save_config,
1411         .pre_boot               = pre_boot,
1412         .get_sysinfo            = get_sysinfo,
1413 };
1414
1415 register_platform(platform_powerpc);