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 = 10000; /* 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 populate_config(struct platform_powerpc *platform,
 496                 struct config *config)
 497 {
 498         const char *val;
 499         char *end;
 500         unsigned long timeout;
 501
 502         /* if the "auto-boot?' property is present and "false", disable auto
 503          * boot */
 504         val = get_param(platform, "auto-boot?");
 505         config->autoboot_enabled = !val || strcmp(val, "false");
 506
 507         val = get_param(platform, "petitboot,timeout");
 508         if (val) {
 509                 timeout = strtoul(val, &end, 10);
 510                 if (end != val) {
 511                         if (timeout >= INT_MAX)
 512                                 timeout = INT_MAX;
 513                         config->autoboot_timeout_sec = (int)timeout;
 514                 }
 515         }
 516
 517         val = get_param(platform, "petitboot,language");
 518         config->lang = val ? talloc_strdup(config, val) : NULL;
 519
 520         populate_network_config(platform, config);
 521
 522         populate_bootdev_config(platform, config);
 523
 524         if (!config->debug) {
 525                 val = get_param(platform, "petitboot,debug?");
 526                 config->debug = val && !strcmp(val, "true");
 527         }
 528
 529         val = get_param(platform, "petitboot,write?");
 530         if (val)
 531                 config->allow_writes = !strcmp(val, "true");
 532
 533         val = get_param(platform, "petitboot,snapshots?");
 534         if (val)
 535                 config->disable_snapshots = !strcmp(val, "false");
 536
 537         val = get_param(platform, "petitboot,console");
 538         if (val)
 539                 config->boot_console = talloc_strdup(config, val);
 540         /* If a full path is already set we don't want to override it */
 541         config->manual_console = config->boot_console &&
 542                                         !strchr(config->boot_console, '[');
 543
 544         val = get_param(platform, "petitboot,http_proxy");
 545         if (val)
 546                 config->http_proxy = talloc_strdup(config, val);
 547         val = get_param(platform, "petitboot,https_proxy");
 548         if (val)
 549                 config->https_proxy = talloc_strdup(config, val);
 550 }
 551
 552 static char *iface_config_str(void *ctx, struct interface_config *config)
 553 {
 554         char *str;
 555
 556         /* todo: HWADDR size is hardcoded as 6, but we may need to handle
 557          * different hardware address formats */
 558         str = talloc_asprintf(ctx, "%02x:%02x:%02x:%02x:%02x:%02x,",
 559                         config->hwaddr[0], config->hwaddr[1],
 560                         config->hwaddr[2], config->hwaddr[3],
 561                         config->hwaddr[4], config->hwaddr[5]);
 562
 563         if (config->ignore) {
 564                 str = talloc_asprintf_append(str, "ignore");
 565
 566         } else if (config->method == CONFIG_METHOD_DHCP) {
 567                 str = talloc_asprintf_append(str, "dhcp");
 568
 569         } else if (config->method == CONFIG_METHOD_STATIC) {
 570                 str = talloc_asprintf_append(str, "static,%s%s%s%s%s",
 571                                 config->static_config.address,
 572                                 config->static_config.gateway ? "," : "",
 573                                 config->static_config.gateway ?: "",
 574                                 config->static_config.url ? "," : "",
 575                                 config->static_config.url ?: "");
 576         }
 577         return str;
 578 }
 579
 580 static char *dns_config_str(void *ctx, const char **dns_servers, int n)
 581 {
 582         char *str;
 583         int i;
 584
 585         str = talloc_strdup(ctx, "dns,");
 586         for (i = 0; i < n; i++) {
 587                 str = talloc_asprintf_append(str, "%s%s",
 588                                 i == 0 ? "" : ",",
 589                                 dns_servers[i]);
 590         }
 591
 592         return str;
 593 }
 594
 595 static void update_string_config(struct platform_powerpc *platform,
 596                 const char *name, const char *value)
 597 {
 598         const char *cur;
 599
 600         cur = get_param(platform, name);
 601
 602         /* don't set an empty parameter if it doesn't already exist */
 603         if (!cur && !strlen(value))
 604                 return;
 605
 606         set_param(platform, name, value);
 607 }
 608
 609 static void update_network_config(struct platform_powerpc *platform,
 610         struct config *config)
 611 {
 612         unsigned int i;
 613         char *val;
 614
 615         /*
 616          * Don't store IPMI overrides to NVRAM. If this was a persistent
 617          * override it was already stored in NVRAM by
 618          * get_ipmi_network_override()
 619          */
 620         if (config->network.n_interfaces &&
 621                 config->network.interfaces[0]->override)
 622                 return;
 623
 624         val = talloc_strdup(platform, "");
 625
 626         for (i = 0; i < config->network.n_interfaces; i++) {
 627                 char *iface_str = iface_config_str(platform,
 628                                         config->network.interfaces[i]);
 629                 val = talloc_asprintf_append(val, "%s%s",
 630                                 *val == '\0' ? "" : " ", iface_str);
 631                 talloc_free(iface_str);
 632         }
 633
 634         if (config->network.n_dns_servers) {
 635                 char *dns_str = dns_config_str(platform,
 636                                                 config->network.dns_servers,
 637                                                 config->network.n_dns_servers);
 638                 val = talloc_asprintf_append(val, "%s%s",
 639                                 *val == '\0' ? "" : " ", dns_str);
 640                 talloc_free(dns_str);
 641         }
 642
 643         update_string_config(platform, "petitboot,network", val);
 644
 645         talloc_free(val);
 646 }
 647
 648 static void update_bootdev_config(struct platform_powerpc *platform,
 649                 struct config *config)
 650 {
 651         char *val = NULL, *boot_str = NULL, *tmp = NULL;
 652         struct autoboot_option *opt;
 653         const char delim = ' ';
 654         unsigned int i;
 655
 656         if (!config->n_autoboot_opts)
 657                 val = "";
 658
 659         for (i = 0; i < config->n_autoboot_opts; i++) {
 660                 opt = &config->autoboot_opts[i];
 661                 switch (opt->boot_type) {
 662                         case BOOT_DEVICE_TYPE:
 663                                 boot_str = talloc_asprintf(config, "%s%c",
 664                                                 device_type_name(opt->type),
 665                                                 delim);
 666                                 break;
 667                         case BOOT_DEVICE_UUID:
 668                                 boot_str = talloc_asprintf(config, "uuid:%s%c",
 669                                                 opt->uuid, delim);
 670                                 break;
 671                         }
 672                         tmp = val = talloc_asprintf_append(val, "%s", boot_str);
 673         }
 674
 675         update_string_config(platform, "petitboot,bootdevs", val);
 676         talloc_free(tmp);
 677         if (boot_str)
 678                 talloc_free(boot_str);
 679 }
 680
 681 static int update_config(struct platform_powerpc *platform,
 682                 struct config *config, struct config *defaults)
 683 {
 684         char *tmp = NULL;
 685         const char *val;
 686
 687         if (config->autoboot_enabled == defaults->autoboot_enabled)
 688                 val = "";
 689         else
 690                 val = config->autoboot_enabled ? "true" : "false";
 691         update_string_config(platform, "auto-boot?", val);
 692
 693         if (config->autoboot_timeout_sec == defaults->autoboot_timeout_sec)
 694                 val = "";
 695         else
 696                 val = tmp = talloc_asprintf(platform, "%d",
 697                                 config->autoboot_timeout_sec);
 698
 699         if (config->ipmi_bootdev == IPMI_BOOTDEV_INVALID &&
 700             platform->clear_ipmi_bootdev) {
 701                 platform->clear_ipmi_bootdev(platform,
 702                                 config->ipmi_bootdev_persistent);
 703                 config->ipmi_bootdev = IPMI_BOOTDEV_NONE;
 704                 config->ipmi_bootdev_persistent = false;
 705         }
 706
 707         update_string_config(platform, "petitboot,timeout", val);
 708         if (tmp)
 709                 talloc_free(tmp);
 710
 711         val = config->lang ?: "";
 712         update_string_config(platform, "petitboot,language", val);
 713
 714         if (config->allow_writes == defaults->allow_writes)
 715                 val = "";
 716         else
 717                 val = config->allow_writes ? "true" : "false";
 718         update_string_config(platform, "petitboot,write?", val);
 719
 720         if (!config->manual_console) {
 721                 val = config->boot_console ?: "";
 722                 update_string_config(platform, "petitboot,console", val);
 723         }
 724
 725         val = config->http_proxy ?: "";
 726         update_string_config(platform, "petitboot,http_proxy", val);
 727         val = config->https_proxy ?: "";
 728         update_string_config(platform, "petitboot,https_proxy", val);
 729
 730         update_network_config(platform, config);
 731
 732         update_bootdev_config(platform, config);
 733
 734         return write_nvram(platform);
 735 }
 736
 737 static void set_ipmi_bootdev(struct config *config, enum ipmi_bootdev bootdev,
 738                 bool persistent)
 739 {
 740         config->ipmi_bootdev = bootdev;
 741         config->ipmi_bootdev_persistent = persistent;
 742
 743         if (bootdev == IPMI_BOOTDEV_SAFE)
 744                 config->safe_mode = true;
 745 }
 746
 747 static int read_bootdev_sysparam(const char *name, uint8_t *val)
 748 {
 749         uint8_t buf[2];
 750         char path[50];
 751         int fd, rc;
 752
 753         assert(strlen(sysparams_dir) + strlen(name) < sizeof(path));
 754         snprintf(path, sizeof(path), "%s%s", sysparams_dir, name);
 755
 756         fd = open(path, O_RDONLY);
 757         if (fd < 0) {
 758                 pb_debug("powerpc: can't access sysparam %s\n",
 759                                 name);
 760                 return -1;
 761         }
 762
 763         rc = read(fd, buf, sizeof(buf));
 764
 765         close(fd);
 766
 767         /* bootdev definitions should only be one byte in size */
 768         if (rc != 1) {
 769                 pb_debug("powerpc: sysparam %s read returned %d\n",
 770                                 name, rc);
 771                 return -1;
 772         }
 773
 774         pb_debug("powerpc: sysparam %s: 0x%02x\n", name, buf[0]);
 775
 776         if (!ipmi_bootdev_is_valid(buf[0]))
 777                 return -1;
 778
 779         *val = buf[0];
 780         return 0;
 781 }
 782
 783 static int write_bootdev_sysparam(const char *name, uint8_t val)
 784 {
 785         char path[50];
 786         int fd, rc;
 787
 788         assert(strlen(sysparams_dir) + strlen(name) < sizeof(path));
 789         snprintf(path, sizeof(path), "%s%s", sysparams_dir, name);
 790
 791         fd = open(path, O_WRONLY);
 792         if (fd < 0) {
 793                 pb_debug("powerpc: can't access sysparam %s for writing\n",
 794                                 name);
 795                 return -1;
 796         }
 797
 798         for (;;) {
 799                 errno = 0;
 800                 rc = write(fd, &val, sizeof(val));
 801                 if (rc == sizeof(val)) {
 802                         rc = 0;
 803                         break;
 804                 }
 805
 806                 if (rc <= 0 && errno != EINTR) {
 807                         pb_log("powerpc: error updating sysparam %s: %s",
 808                                         name, strerror(errno));
 809                         rc = -1;
 810                         break;
 811                 }
 812         }
 813
 814         close(fd);
 815
 816         if (!rc)
 817                 pb_debug("powerpc: set sysparam %s: 0x%02x\n", name, val);
 818
 819         return rc;
 820 }
 821
 822 static int clear_ipmi_bootdev_sysparams(
 823                 struct platform_powerpc *platform __attribute__((unused)),
 824                 bool persistent)
 825 {
 826         if (persistent) {
 827                 /* invalidate default-boot-device setting */
 828                 write_bootdev_sysparam("default-boot-device", 0xff);
 829         } else {
 830                 /* invalidate next-boot-device setting */
 831                 write_bootdev_sysparam("next-boot-device", 0xff);
 832         }
 833         return 0;
 834 }
 835
 836 static int get_ipmi_bootdev_sysparams(
 837                 struct platform_powerpc *platform __attribute__((unused)),
 838                 uint8_t *bootdev, bool *persistent)
 839 {
 840         uint8_t next_bootdev, default_bootdev;
 841         bool next_valid, default_valid;
 842         int rc;
 843
 844         rc = read_bootdev_sysparam("next-boot-device", &next_bootdev);
 845         next_valid = rc == 0;
 846
 847         rc = read_bootdev_sysparam("default-boot-device", &default_bootdev);
 848         default_valid = rc == 0;
 849
 850         /* nothing valid? no need to change the config */
 851         if (!next_valid && !default_valid)
 852                 return -1;
 853
 854         *persistent = !next_valid;
 855         *bootdev = next_valid ? next_bootdev : default_bootdev;
 856         return 0;
 857 }
 858
 859 static int clear_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 860                                    bool persistent __attribute__((unused)))
 861 {
 862         uint16_t resp_len;
 863         uint8_t resp[1];
 864         uint8_t req[] = {
 865                 0x05, /* parameter selector: boot flags */
 866                 0x80, /* data 1: valid */
 867                 0x00, /* data 2: bootdev: no override */
 868                 0x00, /* data 3: system defaults */
 869                 0x00, /* data 4: no request for shared mode, mux defaults */
 870                 0x00, /* data 5: no instance request */
 871         };
 872
 873         resp_len = sizeof(resp);
 874
 875         ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 876                         IPMI_CMD_CHASSIS_SET_SYSTEM_BOOT_OPTIONS,
 877                         req, sizeof(req),
 878                         resp, &resp_len,
 879                         ipmi_timeout);
 880         return 0;
 881 }
 882
 883 static int get_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 884                 uint8_t *bootdev, bool *persistent)
 885 {
 886         uint16_t resp_len;
 887         uint8_t resp[8];
 888         int rc;
 889         uint8_t req[] = {
 890                 0x05, /* parameter selector: boot flags */
 891                 0x00, /* no set selector */
 892                 0x00, /* no block selector */
 893         };
 894
 895         resp_len = sizeof(resp);
 896         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 897                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
 898                         req, sizeof(req),
 899                         resp, &resp_len,
 900                         ipmi_timeout);
 901         if (rc) {
 902                 pb_log("platform: error reading IPMI boot options\n");
 903                 return -1;
 904         }
 905
 906         if (resp_len != sizeof(resp)) {
 907                 pb_log("platform: unexpected length (%d) in "
 908                                 "boot options response\n", resp_len);
 909                 return -1;
 910         }
 911
 912         pb_debug("IPMI get_bootdev response:\n");
 913         for (int i = 0; i < resp_len; i++)
 914                 pb_debug("%x ", resp[i]);
 915         pb_debug("\n");
 916
 917         if (resp[0] != 0) {
 918                 pb_log("platform: non-zero completion code %d from IPMI req\n",
 919                                 resp[0]);
 920                 return -1;
 921         }
 922
 923         /* check for correct parameter version */
 924         if ((resp[1] & 0xf) != 0x1) {
 925                 pb_log("platform: unexpected version (0x%x) in "
 926                                 "boot options response\n", resp[0]);
 927                 return -1;
 928         }
 929
 930         /* check for valid paramters */
 931         if (resp[2] & 0x80) {
 932                 pb_debug("platform: boot options are invalid/locked\n");
 933                 return -1;
 934         }
 935
 936         *persistent = false;
 937
 938         /* check for valid flags */
 939         if (!(resp[3] & 0x80)) {
 940                 pb_debug("platform: boot flags are invalid, ignoring\n");
 941                 return -1;
 942         }
 943
 944         *persistent = resp[3] & 0x40;
 945         *bootdev = (resp[4] >> 2) & 0x0f;
 946         return 0;
 947 }
 948
 949 static int set_ipmi_os_boot_sensor(struct platform_powerpc *platform)
 950 {
 951         int sensor_number;
 952         uint16_t resp_len;
 953         uint8_t resp[1];
 954         uint8_t req[] = {
 955                 0x00, /* sensor number: os boot */
 956                 0xA9, /* operation: set everything */
 957                 0x00, /* sensor reading: none */
 958                 0x40, /* assertion mask lsb: set state 6 */
 959                 0x00, /* assertion mask msb: none */
 960                 0x00, /* deassertion mask lsb: none */
 961                 0x00, /* deassertion mask msb: none */
 962                 0x00, /* event data 1: none */
 963                 0x00, /* event data 2: none */
 964                 0x00, /* event data 3: none */
 965         };
 966
 967         sensor_number = get_ipmi_sensor(platform, IPMI_SENSOR_ID_OS_BOOT);
 968         if (sensor_number < 0) {
 969                 pb_log("Couldn't find OS boot sensor in device tree\n");
 970                 return -1;
 971         }
 972
 973         req[0] = sensor_number;
 974
 975         resp_len = sizeof(resp);
 976
 977         ipmi_transaction(platform->ipmi, IPMI_NETFN_SE,
 978                         IPMI_CMD_SENSOR_SET,
 979                         req, sizeof(req),
 980                         resp, &resp_len,
 981                         ipmi_timeout); return 0;
 982
 983         return 0;
 984 }
 985
 986 static void get_ipmi_bmc_mac(struct platform *p, uint8_t *buf)
 987 {
 988         struct platform_powerpc *platform = p->platform_data;
 989         uint16_t resp_len = 8;
 990         uint8_t resp[8];
 991         uint8_t req[] = { 0x1, 0x5, 0x0, 0x0 };
 992         int i, rc;
 993
 994         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_TRANSPORT,
 995                         IPMI_CMD_TRANSPORT_GET_LAN_PARAMS,
 996                         req, sizeof(req),
 997                         resp, &resp_len,
 998                         ipmi_timeout);
 999
1000         pb_debug("BMC MAC resp [%d][%d]:\n", rc, resp_len);
1001
1002         if (rc == 0 && resp_len > 0) {
1003                 for (i = 2; i < resp_len; i++) {
1004                         pb_debug(" %x", resp[i]);
1005                         buf[i - 2] = resp[i];
1006                 }
1007                 pb_debug("\n");
1008         }
1009
1010 }
1011
1012 /*
1013  * Retrieve info from the "Get Device ID" IPMI commands.
1014  * See Chapter 20.1 in the IPMIv2 specification.
1015  */
1016 static void get_ipmi_bmc_versions(struct platform *p, struct system_info *info)
1017 {
1018         struct platform_powerpc *platform = p->platform_data;
1019         uint16_t resp_len = 16;
1020         uint8_t resp[16], bcd;
1021         int i, rc;
1022
1023         /* Retrieve info from current side */
1024         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_APP,
1025                         IPMI_CMD_APP_GET_DEVICE_ID,
1026                         NULL, 0,
1027                         resp, &resp_len,
1028                         ipmi_timeout);
1029
1030         pb_debug("BMC version resp [%d][%d]:\n", rc, resp_len);
1031         if (resp_len > 0) {
1032                 for (i = 0; i < resp_len; i++) {
1033                         pb_debug(" %x", resp[i]);
1034                 }
1035                 pb_debug("\n");
1036         }
1037
1038         if (rc == 0 && (resp_len == 12 || resp_len == 16)) {
1039                 info->bmc_current = talloc_array(info, char *, 4);
1040                 info->n_bmc_current = 4;
1041
1042                 info->bmc_current[0] = talloc_asprintf(info, "Device ID: 0x%x",
1043                                                 resp[1]);
1044                 info->bmc_current[1] = talloc_asprintf(info, "Device Rev: 0x%x",
1045                                                 resp[2]);
1046                 bcd = resp[4] & 0x0f;
1047                 bcd += 10 * (resp[4] >> 4);
1048                 /* rev1.rev2.aux_revision */
1049                 info->bmc_current[2] = talloc_asprintf(info,
1050                                 "Firmware version: %u.%02u",
1051                                 resp[3], bcd);
1052                 if (resp_len == 16) {
1053                         info->bmc_current[2] = talloc_asprintf_append(
1054                                         info->bmc_current[2],
1055                                         ".%02x%02x%02x%02x",
1056                                         resp[12], resp[13], resp[14], resp[15]);
1057                 }
1058                 bcd = resp[5] & 0x0f;
1059                 bcd += 10 * (resp[5] >> 4);
1060                 info->bmc_current[3] = talloc_asprintf(info, "IPMI version: %u",
1061                                                 bcd);
1062         } else
1063                 pb_log("Failed to retrieve Device ID from IPMI\n");
1064
1065         /* Retrieve info from golden side */
1066         memset(resp, 0, sizeof(resp));
1067         resp_len = 16;
1068         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_AMI,
1069                         IPMI_CMD_APP_GET_DEVICE_ID_GOLDEN,
1070                         NULL, 0,
1071                         resp, &resp_len,
1072                         ipmi_timeout);
1073
1074         pb_debug("BMC golden resp [%d][%d]:\n", rc, resp_len);
1075         if (resp_len > 0) {
1076                 for (i = 0; i < resp_len; i++) {
1077                         pb_debug(" %x", resp[i]);
1078                 }
1079                 pb_debug("\n");
1080         }
1081
1082         if (rc == 0 && (resp_len == 12 || resp_len == 16)) {
1083                 info->bmc_golden = talloc_array(info, char *, 4);
1084                 info->n_bmc_golden = 4;
1085
1086                 info->bmc_golden[0] = talloc_asprintf(info, "Device ID: 0x%x",
1087                                                 resp[1]);
1088                 info->bmc_golden[1] = talloc_asprintf(info, "Device Rev: 0x%x",
1089                                                 resp[2]);
1090                 bcd = resp[4] & 0x0f;
1091                 bcd += 10 * (resp[4] >> 4);
1092                 /* rev1.rev2.aux_revision */
1093                 info->bmc_golden[2] = talloc_asprintf(info,
1094                                 "Firmware version: %u.%02u",
1095                                 resp[3], bcd);
1096                 if (resp_len == 16) {
1097                         info->bmc_golden[2] = talloc_asprintf_append(
1098                                         info->bmc_golden[2],
1099                                         ".%02x%02x%02x%02x",
1100                                         resp[12], resp[13], resp[14], resp[15]);
1101                 }
1102                 bcd = resp[5] & 0x0f;
1103                 bcd += 10 * (resp[5] >> 4);
1104                 info->bmc_golden[3] = talloc_asprintf(info, "IPMI version: %u",
1105                                                 bcd);
1106         } else
1107                 pb_log("Failed to retrieve Golden Device ID from IPMI\n");
1108 }
1109
1110 static void get_ipmi_network_override(struct platform_powerpc *platform,
1111                         struct config *config)
1112 {
1113         uint16_t min_len = 12, resp_len = 53, version;
1114         const uint32_t magic_value = 0x21706221;
1115         uint8_t resp[resp_len];
1116         uint32_t cookie;
1117         bool persistent;
1118         int i, rc;
1119         uint8_t req[] = {
1120                 0x61, /* parameter selector: OEM section (network) */
1121                 0x00, /* no set selector */
1122                 0x00, /* no block selector */
1123         };
1124
1125         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
1126                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
1127                         req, sizeof(req),
1128                         resp, &resp_len,
1129                         ipmi_timeout);
1130
1131         pb_debug("IPMI net override resp [%d][%d]:\n", rc, resp_len);
1132         if (resp_len > 0) {
1133                 for (i = 0; i < resp_len; i++) {
1134                         pb_debug(" %02x", resp[i]);
1135                         if (i && (i + 1) % 16 == 0 && i != resp_len - 1)
1136                                 pb_debug("\n");
1137                         else if (i && (i + 1) % 8 == 0)
1138                                 pb_debug(" ");
1139                 }
1140                 pb_debug("\n");
1141         }
1142
1143         if (rc) {
1144                 pb_debug("IPMI network config option unavailable\n");
1145                 return;
1146         }
1147
1148         if (resp_len < min_len) {
1149                 pb_debug("IPMI net response too small\n");
1150                 return;
1151         }
1152
1153         if (resp[0] != 0) {
1154                 pb_log("platform: non-zero completion code %d from IPMI network req\n",
1155                        resp[0]);
1156                 return;
1157         }
1158
1159         /* Check for correct parameter version */
1160         if ((resp[1] & 0xf) != 0x1) {
1161                 pb_log("platform: unexpected version (0x%x) in network override response\n",
1162                        resp[0]);
1163                 return;
1164         }
1165
1166         /* Check that the parameters are valid */
1167         if (resp[2] & 0x80) {
1168                 pb_debug("platform: network override is invalid/locked\n");
1169                 return;
1170         }
1171
1172         /* Check for valid parameters in the boot flags section */
1173         if (!(resp[3] & 0x80)) {
1174                 pb_debug("platform: network override valid flag not set\n");
1175                 return;
1176         }
1177         /* Read the persistent flag; if it is set we need to save this config */
1178         persistent = resp[3] & 0x40;
1179         if (persistent)
1180                 pb_debug("platform: network override is persistent\n");
1181
1182         /* Check 4-byte cookie value */
1183         i = 4;
1184         memcpy(&cookie, &resp[i], sizeof(cookie));
1185         cookie = __be32_to_cpu(cookie);
1186         if (cookie != magic_value) {
1187                 pb_log("%s: Incorrect cookie %x\n", __func__, cookie);
1188                 return;
1189         }
1190         i += sizeof(cookie);
1191
1192         /* Check 2-byte version number */
1193         memcpy(&version, &resp[i], sizeof(version));
1194         version = __be16_to_cpu(version);
1195         i += sizeof(version);
1196         if (version != 1) {
1197                 pb_debug("Unexpected version: %u\n", version);
1198                 return;
1199         }
1200
1201         /* Interpret the rest of the interface config */
1202         rc = parse_ipmi_interface_override(config, &resp[i], resp_len - i);
1203
1204         if (!rc && persistent) {
1205                 /* Write this new config to NVRAM */
1206                 update_network_config(platform, config);
1207                 rc = write_nvram(platform);
1208                 if (rc)
1209                         pb_log("platform: Failed to save persistent interface override\n");
1210         }
1211 }
1212
1213 static void get_active_consoles(struct config *config)
1214 {
1215         struct stat sbuf;
1216         char *fsp_prop = NULL;
1217
1218         config->n_consoles = 2;
1219         config->consoles = talloc_array(config, char *, config->n_consoles);
1220         if (!config->consoles)
1221                 goto err;
1222
1223         config->consoles[0] = talloc_asprintf(config->consoles,
1224                                         "/dev/hvc0 [IPMI / Serial]");
1225         config->consoles[1] = talloc_asprintf(config->consoles,
1226                                         "/dev/tty1 [VGA]");
1227
1228         fsp_prop = talloc_asprintf(config, "%sfsps", devtree_dir);
1229         if (stat(fsp_prop, &sbuf) == 0) {
1230                 /* FSP based machines also have a separate serial console */
1231                 config->consoles = talloc_realloc(config, config->consoles,
1232                                                 char *, config->n_consoles + 1);
1233                 if (!config->consoles)
1234                         goto err;
1235                 config->consoles[config->n_consoles++] = talloc_asprintf(
1236                                                 config->consoles,
1237                                                 "/dev/hvc1 [Serial]");
1238         }
1239
1240         return;
1241 err:
1242         config->n_consoles = 0;
1243         pb_log("Failed to allocate memory for consoles\n");
1244 }
1245
1246 static int load_config(struct platform *p, struct config *config)
1247 {
1248         struct platform_powerpc *platform = to_platform_powerpc(p);
1249         int rc;
1250
1251         rc = parse_nvram(platform);
1252         if (rc)
1253                 pb_log("%s: Failed to parse nvram\n", __func__);
1254
1255         populate_config(platform, config);
1256
1257         if (platform->get_ipmi_bootdev) {
1258                 bool bootdev_persistent;
1259                 uint8_t bootdev = IPMI_BOOTDEV_INVALID;
1260                 rc = platform->get_ipmi_bootdev(platform, &bootdev,
1261                                 &bootdev_persistent);
1262                 if (!rc && ipmi_bootdev_is_valid(bootdev)) {
1263                         set_ipmi_bootdev(config, bootdev, bootdev_persistent);
1264                 }
1265         }
1266
1267         if (platform->ipmi)
1268                 get_ipmi_network_override(platform, config);
1269
1270         get_active_consoles(config);
1271
1272         return 0;
1273 }
1274
1275 static int save_config(struct platform *p, struct config *config)
1276 {
1277         struct platform_powerpc *platform = to_platform_powerpc(p);
1278         struct config *defaults;
1279         int rc;
1280
1281         defaults = talloc_zero(platform, struct config);
1282         config_set_defaults(defaults);
1283
1284         rc = update_config(platform, config, defaults);
1285
1286         talloc_free(defaults);
1287         return rc;
1288 }
1289
1290 static void pre_boot(struct platform *p, const struct config *config)
1291 {
1292         struct platform_powerpc *platform = to_platform_powerpc(p);
1293
1294         if (!config->ipmi_bootdev_persistent && platform->clear_ipmi_bootdev)
1295                 platform->clear_ipmi_bootdev(platform, false);
1296
1297         if (platform->set_os_boot_sensor)
1298                 platform->set_os_boot_sensor(platform);
1299 }
1300
1301 static int get_sysinfo(struct platform *p, struct system_info *sysinfo)
1302 {
1303         struct platform_powerpc *platform = p->platform_data;
1304         char *buf, *filename;
1305         int len, rc;
1306
1307         filename = talloc_asprintf(platform, "%smodel", devtree_dir);
1308         rc = read_file(platform, filename, &buf, &len);
1309         if (rc == 0)
1310                 sysinfo->type = talloc_steal(sysinfo, buf);
1311         talloc_free(filename);
1312
1313         filename = talloc_asprintf(platform, "%ssystem-id", devtree_dir);
1314         rc = read_file(platform, filename, &buf, &len);
1315         if (rc == 0)
1316                 sysinfo->identifier = talloc_steal(sysinfo, buf);
1317         talloc_free(filename);
1318
1319         sysinfo->bmc_mac = talloc_zero_size(sysinfo, HWADDR_SIZE);
1320         if (platform->ipmi)
1321                 get_ipmi_bmc_mac(p, sysinfo->bmc_mac);
1322
1323         if (platform->ipmi)
1324                 get_ipmi_bmc_versions(p, sysinfo);
1325
1326         if (platform->get_platform_versions)
1327                 platform->get_platform_versions(sysinfo);
1328
1329         return 0;
1330 }
1331
1332 static bool probe(struct platform *p, void *ctx)
1333 {
1334         struct platform_powerpc *platform;
1335         struct stat statbuf;
1336         bool bmc_present;
1337         int rc;
1338
1339         /* we need a device tree */
1340         rc = stat("/proc/device-tree", &statbuf);
1341         if (rc)
1342                 return false;
1343
1344         if (!S_ISDIR(statbuf.st_mode))
1345                 return false;
1346
1347         platform = talloc_zero(ctx, struct platform_powerpc);
1348         list_init(&platform->params);
1349
1350         p->platform_data = platform;
1351
1352         bmc_present = stat("/proc/device-tree/bmc", &statbuf) == 0;
1353
1354         if (ipmi_present() && bmc_present) {
1355                 pb_debug("platform: using direct IPMI for IPMI paramters\n");
1356                 platform->ipmi = ipmi_open(platform);
1357                 platform->get_ipmi_bootdev = get_ipmi_bootdev_ipmi;
1358                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_ipmi;
1359                 platform->set_os_boot_sensor = set_ipmi_os_boot_sensor;
1360         } else if (!stat(sysparams_dir, &statbuf)) {
1361                 pb_debug("platform: using sysparams for IPMI paramters\n");
1362                 platform->get_ipmi_bootdev = get_ipmi_bootdev_sysparams;
1363                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_sysparams;
1364
1365         } else {
1366                 pb_log("platform: no IPMI parameter support\n");
1367         }
1368
1369         if (bmc_present)
1370                 platform->get_platform_versions = hostboot_load_versions;
1371
1372         return true;
1373 }
1374
1375
1376 static struct platform platform_powerpc = {
1377         .name                   = "powerpc",
1378         .dhcp_arch_id           = 0x000e,
1379         .probe                  = probe,
1380         .load_config            = load_config,
1381         .save_config            = save_config,
1382         .pre_boot               = pre_boot,
1383         .get_sysinfo            = get_sysinfo,
1384 };
1385
1386 register_platform(platform_powerpc);