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