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
  12 #include <file/file.h>
  13 #include <talloc/talloc.h>
  14 #include <list/list.h>
  15 #include <log/log.h>
  16 #include <process/process.h>
  17 #include <types/types.h>
  18
  19 #include "hostboot.h"
  20 #include "platform.h"
  21 #include "ipmi.h"
  22 #include "dt.h"
  23
  24 static const char *partition = "common";
  25 static const char *sysparams_dir = "/sys/firmware/opal/sysparams/";
  26 static const char *devtree_dir = "/proc/device-tree/";
  27 static const int ipmi_timeout = 5000; /* milliseconds. */
  28
  29 struct param {
  30         char                    *name;
  31         char                    *value;
  32         bool                    modified;
  33         struct list_item        list;
  34 };
  35
  36 struct platform_powerpc {
  37         struct list     params;
  38         struct ipmi     *ipmi;
  39         bool            ipmi_bootdev_persistent;
  40         int             (*get_ipmi_bootdev)(
  41                                 struct platform_powerpc *platform,
  42                                 uint8_t *bootdev, bool *persistent);
  43         int             (*clear_ipmi_bootdev)(
  44                                 struct platform_powerpc *platform,
  45                                 bool persistent);
  46         int             (*set_os_boot_sensor)(
  47                                 struct platform_powerpc *platform);
  48         void            (*get_platform_versions)(struct system_info *info);
  49 };
  50
  51 static const char *known_params[] = {
  52         "auto-boot?",
  53         "petitboot,network",
  54         "petitboot,timeout",
  55         "petitboot,bootdev",
  56         "petitboot,bootdevs",
  57         "petitboot,language",
  58         "petitboot,debug?",
  59         "petitboot,write?",
  60         "petitboot,snapshots?",
  61         NULL,
  62 };
  63
  64 #define to_platform_powerpc(p) \
  65         (struct platform_powerpc *)(p->platform_data)
  66
  67 /* a partition max a max size of 64k * 16bytes = 1M */
  68 static const int max_partition_size = 64 * 1024 * 16;
  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                 rc = 0;
 414         } else if (!strncmp(*pos, "mac:", strlen("mac:"))) {
 415                 prefix = strlen("mac:");
 416                 opt->boot_type = BOOT_DEVICE_UUID;
 417                 rc = 0;
 418         } else {
 419                 type = find_device_type(*pos);
 420                 if (type != DEVICE_TYPE_UNKNOWN) {
 421                         opt->type = type;
 422                         opt->boot_type = BOOT_DEVICE_TYPE;
 423                         rc = 0;
 424                 }
 425         }
 426
 427         if (opt->boot_type == BOOT_DEVICE_UUID) {
 428                 if (delim)
 429                         len = (int)(delim - *pos) - prefix;
 430                 else
 431                         len = strlen(*pos);
 432
 433                 opt->uuid = talloc_strndup(ctx, *pos + prefix, len);
 434         }
 435
 436         /* Always advance pointer to next option or end */
 437         if (delim)
 438                 *pos = delim + 1;
 439         else
 440                 *pos += strlen(*pos);
 441
 442         return rc;
 443 }
 444
 445 static void populate_bootdev_config(struct platform_powerpc *platform,
 446                 struct config *config)
 447 {
 448         struct autoboot_option *opt, *new = NULL;
 449         char *pos, *end, *old_dev = NULL;
 450         unsigned int n_new = 0;
 451         const char *val;
 452         bool conflict;
 453
 454         /* Check for old-style bootdev */
 455         val = get_param(platform, "petitboot,bootdev");
 456         if (val && strlen(val)) {
 457                 pos = talloc_strdup(config, val);
 458                 if (!strncmp(val, "uuid:", strlen("uuid:")))
 459                         old_dev = talloc_strdup(config,
 460                                                 val + strlen("uuid:"));
 461                 else if (!strncmp(val, "mac:", strlen("mac:")))
 462                         old_dev = talloc_strdup(config,
 463                                                 val + strlen("mac:"));
 464         }
 465
 466         /* Check for ordered bootdevs */
 467         val = get_param(platform, "petitboot,bootdevs");
 468         if (!val || !strlen(val)) {
 469                 pos = end = NULL;
 470         } else {
 471                 pos = talloc_strdup(config, val);
 472                 end = strchr(pos, '\0');
 473         }
 474
 475         while (pos && pos < end) {
 476                 opt = talloc(config, struct autoboot_option);
 477
 478                 if (read_bootdev(config, &pos, opt)) {
 479                         pb_log("bootdev config is in an unknown format "
 480                                "(expected uuid:... or mac:...)\n");
 481                         talloc_free(opt);
 482                         continue;
 483                 }
 484
 485                 new = talloc_realloc(config, new, struct autoboot_option,
 486                                      n_new + 1);
 487                 new[n_new] = *opt;
 488                 n_new++;
 489                 talloc_free(opt);
 490
 491         }
 492
 493         if (!n_new && !old_dev) {
 494                 /* If autoboot has been disabled, clear the default options */
 495                 if (!config->autoboot_enabled) {
 496                         talloc_free(config->autoboot_opts);
 497                         config->n_autoboot_opts = 0;
 498                 }
 499                 return;
 500         }
 501
 502         conflict = old_dev && (!n_new ||
 503                                     new[0].boot_type == BOOT_DEVICE_TYPE ||
 504                                     /* Canonical UUIDs are 36 characters long */
 505                                     strncmp(new[0].uuid, old_dev, 36));
 506
 507         if (!conflict) {
 508                 talloc_free(config->autoboot_opts);
 509                 config->autoboot_opts = new;
 510                 config->n_autoboot_opts = n_new;
 511                 return;
 512         }
 513
 514         /*
 515          * Difference detected, defer to old format in case it has been updated
 516          * recently
 517          */
 518         pb_debug("Old autoboot bootdev detected\n");
 519         talloc_free(config->autoboot_opts);
 520         config->autoboot_opts = talloc(config, struct autoboot_option);
 521         config->autoboot_opts[0].boot_type = BOOT_DEVICE_UUID;
 522         config->autoboot_opts[0].uuid = talloc_strdup(config, old_dev);
 523         config->n_autoboot_opts = 1;
 524 }
 525
 526 static void populate_config(struct platform_powerpc *platform,
 527                 struct config *config)
 528 {
 529         const char *val;
 530         char *end;
 531         unsigned long timeout;
 532
 533         /* if the "auto-boot?' property is present and "false", disable auto
 534          * boot */
 535         val = get_param(platform, "auto-boot?");
 536         config->autoboot_enabled = !val || strcmp(val, "false");
 537
 538         val = get_param(platform, "petitboot,timeout");
 539         if (val) {
 540                 timeout = strtoul(val, &end, 10);
 541                 if (end != val) {
 542                         if (timeout >= INT_MAX)
 543                                 timeout = INT_MAX;
 544                         config->autoboot_timeout_sec = (int)timeout;
 545                 }
 546         }
 547
 548         val = get_param(platform, "petitboot,language");
 549         config->lang = val ? talloc_strdup(config, val) : NULL;
 550
 551         populate_network_config(platform, config);
 552
 553         populate_bootdev_config(platform, config);
 554
 555         if (!config->debug) {
 556                 val = get_param(platform, "petitboot,debug?");
 557                 config->debug = val && !strcmp(val, "true");
 558         }
 559
 560         val = get_param(platform, "petitboot,write?");
 561         if (val)
 562                 config->allow_writes = !strcmp(val, "true");
 563
 564         val = get_param(platform, "petitboot,snapshots?");
 565         if (val)
 566                 config->disable_snapshots = !strcmp(val, "false");
 567 }
 568
 569 static char *iface_config_str(void *ctx, struct interface_config *config)
 570 {
 571         char *str;
 572
 573         /* todo: HWADDR size is hardcoded as 6, but we may need to handle
 574          * different hardware address formats */
 575         str = talloc_asprintf(ctx, "%02x:%02x:%02x:%02x:%02x:%02x,",
 576                         config->hwaddr[0], config->hwaddr[1],
 577                         config->hwaddr[2], config->hwaddr[3],
 578                         config->hwaddr[4], config->hwaddr[5]);
 579
 580         if (config->ignore) {
 581                 str = talloc_asprintf_append(str, "ignore");
 582
 583         } else if (config->method == CONFIG_METHOD_DHCP) {
 584                 str = talloc_asprintf_append(str, "dhcp");
 585
 586         } else if (config->method == CONFIG_METHOD_STATIC) {
 587                 str = talloc_asprintf_append(str, "static,%s%s%s%s%s",
 588                                 config->static_config.address,
 589                                 config->static_config.gateway ? "," : "",
 590                                 config->static_config.gateway ?: "",
 591                                 config->static_config.url ? "," : "",
 592                                 config->static_config.url ?: "");
 593         }
 594         return str;
 595 }
 596
 597 static char *dns_config_str(void *ctx, const char **dns_servers, int n)
 598 {
 599         char *str;
 600         int i;
 601
 602         str = talloc_strdup(ctx, "dns,");
 603         for (i = 0; i < n; i++) {
 604                 str = talloc_asprintf_append(str, "%s%s",
 605                                 i == 0 ? "" : ",",
 606                                 dns_servers[i]);
 607         }
 608
 609         return str;
 610 }
 611
 612 static void update_string_config(struct platform_powerpc *platform,
 613                 const char *name, const char *value)
 614 {
 615         const char *cur;
 616
 617         cur = get_param(platform, name);
 618
 619         /* don't set an empty parameter if it doesn't already exist */
 620         if (!cur && !strlen(value))
 621                 return;
 622
 623         set_param(platform, name, value);
 624 }
 625
 626 static void update_network_config(struct platform_powerpc *platform,
 627         struct config *config)
 628 {
 629         unsigned int i;
 630         char *val;
 631
 632         val = talloc_strdup(platform, "");
 633
 634         for (i = 0; i < config->network.n_interfaces; i++) {
 635                 char *iface_str = iface_config_str(platform,
 636                                         config->network.interfaces[i]);
 637                 val = talloc_asprintf_append(val, "%s%s",
 638                                 *val == '\0' ? "" : " ", iface_str);
 639                 talloc_free(iface_str);
 640         }
 641
 642         if (config->network.n_dns_servers) {
 643                 char *dns_str = dns_config_str(platform,
 644                                                 config->network.dns_servers,
 645                                                 config->network.n_dns_servers);
 646                 val = talloc_asprintf_append(val, "%s%s",
 647                                 *val == '\0' ? "" : " ", dns_str);
 648                 talloc_free(dns_str);
 649         }
 650
 651         update_string_config(platform, "petitboot,network", val);
 652
 653         talloc_free(val);
 654 }
 655
 656 static void update_bootdev_config(struct platform_powerpc *platform,
 657                 struct config *config)
 658 {
 659         char *val = NULL, *boot_str = NULL, *tmp = NULL, *first = NULL;
 660         struct autoboot_option *opt;
 661         const char delim = ' ';
 662         unsigned int i;
 663
 664         if (!config->n_autoboot_opts)
 665                 first = val = "";
 666         else if (config->autoboot_opts[0].boot_type == BOOT_DEVICE_UUID)
 667                 first = talloc_asprintf(config, "uuid:%s",
 668                                         config->autoboot_opts[0].uuid);
 669         else
 670                 first = "";
 671
 672         for (i = 0; i < config->n_autoboot_opts; i++) {
 673                 opt = &config->autoboot_opts[i];
 674                 switch (opt->boot_type) {
 675                         case BOOT_DEVICE_TYPE:
 676                                 boot_str = talloc_asprintf(config, "%s%c",
 677                                                 device_type_name(opt->type),
 678                                                 delim);
 679                                 break;
 680                         case BOOT_DEVICE_UUID:
 681                                 boot_str = talloc_asprintf(config, "uuid:%s%c",
 682                                                 opt->uuid, delim);
 683                                 break;
 684                         }
 685                         tmp = val = talloc_asprintf_append(val, "%s", boot_str);
 686         }
 687
 688         update_string_config(platform, "petitboot,bootdevs", val);
 689         update_string_config(platform, "petitboot,bootdev", first);
 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         update_network_config(platform, config);
 735
 736         update_bootdev_config(platform, config);
 737
 738         return write_nvram(platform);
 739 }
 740
 741 static void set_ipmi_bootdev(struct config *config, enum ipmi_bootdev bootdev,
 742                 bool persistent)
 743 {
 744         config->ipmi_bootdev = bootdev;
 745         config->ipmi_bootdev_persistent = persistent;
 746
 747         switch (bootdev) {
 748         case IPMI_BOOTDEV_NONE:
 749         case IPMI_BOOTDEV_DISK:
 750         case IPMI_BOOTDEV_NETWORK:
 751         case IPMI_BOOTDEV_CDROM:
 752         default:
 753                 break;
 754         case IPMI_BOOTDEV_SETUP:
 755                 config->autoboot_enabled = false;
 756                 break;
 757         case IPMI_BOOTDEV_SAFE:
 758                 config->autoboot_enabled = false;
 759                 config->safe_mode = true;
 760                 break;
 761         }
 762 }
 763
 764 static int read_bootdev_sysparam(const char *name, uint8_t *val)
 765 {
 766         uint8_t buf[2];
 767         char path[50];
 768         int fd, rc;
 769
 770         assert(strlen(sysparams_dir) + strlen(name) < sizeof(path));
 771         snprintf(path, sizeof(path), "%s%s", sysparams_dir, name);
 772
 773         fd = open(path, O_RDONLY);
 774         if (fd < 0) {
 775                 pb_debug("powerpc: can't access sysparam %s\n",
 776                                 name);
 777                 return -1;
 778         }
 779
 780         rc = read(fd, buf, sizeof(buf));
 781
 782         close(fd);
 783
 784         /* bootdev definitions should only be one byte in size */
 785         if (rc != 1) {
 786                 pb_debug("powerpc: sysparam %s read returned %d\n",
 787                                 name, rc);
 788                 return -1;
 789         }
 790
 791         pb_debug("powerpc: sysparam %s: 0x%02x\n", name, buf[0]);
 792
 793         if (!ipmi_bootdev_is_valid(buf[0]))
 794                 return -1;
 795
 796         *val = buf[0];
 797         return 0;
 798 }
 799
 800 static int write_bootdev_sysparam(const char *name, uint8_t val)
 801 {
 802         char path[50];
 803         int fd, rc;
 804
 805         assert(strlen(sysparams_dir) + strlen(name) < sizeof(path));
 806         snprintf(path, sizeof(path), "%s%s", sysparams_dir, name);
 807
 808         fd = open(path, O_WRONLY);
 809         if (fd < 0) {
 810                 pb_debug("powerpc: can't access sysparam %s for writing\n",
 811                                 name);
 812                 return -1;
 813         }
 814
 815         for (;;) {
 816                 errno = 0;
 817                 rc = write(fd, &val, sizeof(val));
 818                 if (rc == sizeof(val)) {
 819                         rc = 0;
 820                         break;
 821                 }
 822
 823                 if (rc <= 0 && errno != EINTR) {
 824                         pb_log("powerpc: error updating sysparam %s: %s",
 825                                         name, strerror(errno));
 826                         rc = -1;
 827                         break;
 828                 }
 829         }
 830
 831         close(fd);
 832
 833         if (!rc)
 834                 pb_debug("powerpc: set sysparam %s: 0x%02x\n", name, val);
 835
 836         return rc;
 837 }
 838
 839 static int clear_ipmi_bootdev_sysparams(
 840                 struct platform_powerpc *platform __attribute__((unused)),
 841                 bool persistent)
 842 {
 843         if (persistent) {
 844                 /* invalidate default-boot-device setting */
 845                 write_bootdev_sysparam("default-boot-device", 0xff);
 846         } else {
 847                 /* invalidate next-boot-device setting */
 848                 write_bootdev_sysparam("next-boot-device", 0xff);
 849         }
 850         return 0;
 851 }
 852
 853 static int get_ipmi_bootdev_sysparams(
 854                 struct platform_powerpc *platform __attribute__((unused)),
 855                 uint8_t *bootdev, bool *persistent)
 856 {
 857         uint8_t next_bootdev, default_bootdev;
 858         bool next_valid, default_valid;
 859         int rc;
 860
 861         rc = read_bootdev_sysparam("next-boot-device", &next_bootdev);
 862         next_valid = rc == 0;
 863
 864         rc = read_bootdev_sysparam("default-boot-device", &default_bootdev);
 865         default_valid = rc == 0;
 866
 867         /* nothing valid? no need to change the config */
 868         if (!next_valid && !default_valid)
 869                 return -1;
 870
 871         *persistent = !next_valid;
 872         *bootdev = next_valid ? next_bootdev : default_bootdev;
 873         return 0;
 874 }
 875
 876 static int clear_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 877                                    bool persistent __attribute__((unused)))
 878 {
 879         uint16_t resp_len;
 880         uint8_t resp[1];
 881         uint8_t req[] = {
 882                 0x05, /* parameter selector: boot flags */
 883                 0x80, /* data 1: valid */
 884                 0x00, /* data 2: bootdev: no override */
 885                 0x00, /* data 3: system defaults */
 886                 0x00, /* data 4: no request for shared mode, mux defaults */
 887                 0x00, /* data 5: no instance request */
 888         };
 889
 890         resp_len = sizeof(resp);
 891
 892         ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 893                         IPMI_CMD_CHASSIS_SET_SYSTEM_BOOT_OPTIONS,
 894                         req, sizeof(req),
 895                         resp, &resp_len,
 896                         ipmi_timeout);
 897         return 0;
 898 }
 899
 900 static int get_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 901                 uint8_t *bootdev, bool *persistent)
 902 {
 903         uint16_t resp_len;
 904         uint8_t resp[8];
 905         int rc;
 906         uint8_t req[] = {
 907                 0x05, /* parameter selector: boot flags */
 908                 0x00, /* no set selector */
 909                 0x00, /* no block selector */
 910         };
 911
 912         resp_len = sizeof(resp);
 913         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 914                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
 915                         req, sizeof(req),
 916                         resp, &resp_len,
 917                         ipmi_timeout);
 918         if (rc) {
 919                 pb_log("platform: error reading IPMI boot options\n");
 920                 return -1;
 921         }
 922
 923         if (resp_len != sizeof(resp)) {
 924                 pb_log("platform: unexpected length (%d) in "
 925                                 "boot options response\n", resp_len);
 926                 return -1;
 927         }
 928
 929         pb_debug("IPMI get_bootdev response:\n");
 930         for (int i = 0; i < resp_len; i++)
 931                 pb_debug("%x ", resp[i]);
 932         pb_debug("\n");
 933
 934         if (resp[0] != 0) {
 935                 pb_log("platform: non-zero completion code %d from IPMI req\n",
 936                                 resp[0]);
 937                 return -1;
 938         }
 939
 940         /* check for correct parameter version */
 941         if ((resp[1] & 0xf) != 0x1) {
 942                 pb_log("platform: unexpected version (0x%x) in "
 943                                 "boot options response\n", resp[0]);
 944                 return -1;
 945         }
 946
 947         /* check for valid paramters */
 948         if (resp[2] & 0x80) {
 949                 pb_debug("platform: boot options are invalid/locked\n");
 950                 return -1;
 951         }
 952
 953         *persistent = false;
 954
 955         /* check for valid flags */
 956         if (!(resp[3] & 0x80)) {
 957                 pb_debug("platform: boot flags are invalid, ignoring\n");
 958                 return 0;
 959         }
 960
 961         *persistent = resp[3] & 0x40;
 962         *bootdev = (resp[4] >> 2) & 0x0f;
 963         return 0;
 964 }
 965
 966 static int set_ipmi_os_boot_sensor(struct platform_powerpc *platform)
 967 {
 968         int sensor_number;
 969         uint16_t resp_len;
 970         uint8_t resp[1];
 971         uint8_t req[] = {
 972                 0x00, /* sensor number: os boot */
 973                 0xA9, /* operation: set everything */
 974                 0x00, /* sensor reading: none */
 975                 0x40, /* assertion mask lsb: set state 6 */
 976                 0x00, /* assertion mask msb: none */
 977                 0x00, /* deassertion mask lsb: none */
 978                 0x00, /* deassertion mask msb: none */
 979                 0x00, /* event data 1: none */
 980                 0x00, /* event data 2: none */
 981                 0x00, /* event data 3: none */
 982         };
 983
 984         sensor_number = get_ipmi_sensor(platform, IPMI_SENSOR_ID_OS_BOOT);
 985         if (sensor_number < 0) {
 986                 pb_log("Couldn't find OS boot sensor in device tree\n");
 987                 return -1;
 988         }
 989
 990         req[0] = sensor_number;
 991
 992         resp_len = sizeof(resp);
 993
 994         ipmi_transaction(platform->ipmi, IPMI_NETFN_SE,
 995                         IPMI_CMD_SENSOR_SET,
 996                         req, sizeof(req),
 997                         resp, &resp_len,
 998                         ipmi_timeout); return 0;
 999
1000         return 0;
1001 }
1002
1003 static void get_ipmi_bmc_mac(struct platform *p, uint8_t *buf)
1004 {
1005         struct platform_powerpc *platform = p->platform_data;
1006         uint16_t resp_len = 8;
1007         uint8_t resp[8];
1008         uint8_t req[] = { 0x1, 0x5, 0x0, 0x0 };
1009         int i, rc;
1010
1011         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_TRANSPORT,
1012                         IPMI_CMD_TRANSPORT_GET_LAN_PARAMS,
1013                         req, sizeof(req),
1014                         resp, &resp_len,
1015                         ipmi_timeout);
1016
1017         pb_debug("BMC MAC resp [%d][%d]:\n", rc, resp_len);
1018
1019         if (rc == 0 && resp_len > 0) {
1020                 for (i = 2; i < resp_len; i++) {
1021                         pb_debug(" %x", resp[i]);
1022                         buf[i - 2] = resp[i];
1023                 }
1024                 pb_debug("\n");
1025         }
1026
1027 }
1028
1029 /*
1030  * Retrieve info from the "Get Device ID" IPMI commands.
1031  * See Chapter 20.1 in the IPMIv2 specification.
1032  */
1033 static void get_ipmi_bmc_versions(struct platform *p, struct system_info *info)
1034 {
1035         struct platform_powerpc *platform = p->platform_data;
1036         uint16_t resp_len = 16;
1037         uint8_t resp[16], bcd;
1038         uint32_t aux_version;
1039         int i, rc;
1040
1041         /* Retrieve info from current side */
1042         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_APP,
1043                         IPMI_CMD_APP_GET_DEVICE_ID,
1044                         NULL, 0,
1045                         resp, &resp_len,
1046                         ipmi_timeout);
1047
1048         pb_debug("BMC version resp [%d][%d]:\n", rc, resp_len);
1049         if (resp_len > 0) {
1050                 for (i = 0; i < resp_len; i++) {
1051                         pb_debug(" %x", resp[i]);
1052                 }
1053                 pb_debug("\n");
1054         }
1055
1056         if (rc == 0 && resp_len == 16) {
1057                 info->bmc_current = talloc_array(info, char *, 4);
1058                 info->n_bmc_current = 4;
1059
1060                 info->bmc_current[0] = talloc_asprintf(info, "Device ID: 0x%x",
1061                                                 resp[1]);
1062                 info->bmc_current[1] = talloc_asprintf(info, "Device Rev: 0x%x",
1063                                                 resp[2]);
1064                 bcd = resp[4] & 0x0f;
1065                 bcd += 10 * (resp[4] >> 4);
1066                 memcpy(&aux_version, &resp[12], sizeof(aux_version));
1067                 info->bmc_current[2] = talloc_asprintf(info,
1068                                                 "Firmware version: %u.%u.%u",
1069                                                 resp[3], bcd, aux_version);
1070                 bcd = resp[5] & 0x0f;
1071                 bcd += 10 * (resp[5] >> 4);
1072                 info->bmc_current[3] = talloc_asprintf(info, "IPMI version: %u",
1073                                                 bcd);
1074         } else
1075                 pb_log("Failed to retrieve Device ID from IPMI\n");
1076
1077         /* Retrieve info from golden side */
1078         memset(resp, 0, sizeof(resp));
1079         resp_len = 16;
1080         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_AMI,
1081                         IPMI_CMD_APP_GET_DEVICE_ID_GOLDEN,
1082                         NULL, 0,
1083                         resp, &resp_len,
1084                         ipmi_timeout);
1085
1086         pb_debug("BMC golden resp [%d][%d]:\n", rc, resp_len);
1087         if (resp_len > 0) {
1088                 for (i = 0; i < resp_len; i++) {
1089                         pb_debug(" %x", resp[i]);
1090                 }
1091                 pb_debug("\n");
1092         }
1093
1094         if (rc == 0 && resp_len == 16) {
1095                 info->bmc_golden = talloc_array(info, char *, 4);
1096                 info->n_bmc_golden = 4;
1097
1098                 info->bmc_golden[0] = talloc_asprintf(info, "Device ID: 0x%x",
1099                                                 resp[1]);
1100                 info->bmc_golden[1] = talloc_asprintf(info, "Device Rev: 0x%x",
1101                                                 resp[2]);
1102                 bcd = resp[4] & 0x0f;
1103                 bcd += 10 * (resp[4] >> 4);
1104                 memcpy(&aux_version, &resp[12], sizeof(aux_version));
1105                 info->bmc_golden[2] = talloc_asprintf(info,
1106                                                 "Firmware version: %u.%u.%u",
1107                                                 resp[3], bcd, aux_version);
1108                 bcd = resp[5] & 0x0f;
1109                 bcd += 10 * (resp[5] >> 4);
1110                 info->bmc_golden[3] = talloc_asprintf(info, "IPMI version: %u",
1111                                                 bcd);
1112         } else
1113                 pb_log("Failed to retrieve Golden Device ID from IPMI\n");
1114 }
1115
1116 static int load_config(struct platform *p, struct config *config)
1117 {
1118         struct platform_powerpc *platform = to_platform_powerpc(p);
1119         int rc;
1120
1121         rc = parse_nvram(platform);
1122         if (rc)
1123                 return rc;
1124
1125         populate_config(platform, config);
1126
1127         if (platform->get_ipmi_bootdev) {
1128                 bool bootdev_persistent;
1129                 uint8_t bootdev;
1130                 rc = platform->get_ipmi_bootdev(platform, &bootdev,
1131                                 &bootdev_persistent);
1132                 if (!rc && ipmi_bootdev_is_valid(bootdev)) {
1133                         set_ipmi_bootdev(config, bootdev, bootdev_persistent);
1134                 }
1135         }
1136
1137         return 0;
1138 }
1139
1140 static int save_config(struct platform *p, struct config *config)
1141 {
1142         struct platform_powerpc *platform = to_platform_powerpc(p);
1143         struct config *defaults;
1144         int rc;
1145
1146         defaults = talloc_zero(platform, struct config);
1147         config_set_defaults(defaults);
1148
1149         rc = update_config(platform, config, defaults);
1150
1151         talloc_free(defaults);
1152         return rc;
1153 }
1154
1155 static void pre_boot(struct platform *p, const struct config *config)
1156 {
1157         struct platform_powerpc *platform = to_platform_powerpc(p);
1158
1159         if (!config->ipmi_bootdev_persistent && platform->clear_ipmi_bootdev)
1160                 platform->clear_ipmi_bootdev(platform, false);
1161
1162         if (platform->set_os_boot_sensor)
1163                 platform->set_os_boot_sensor(platform);
1164 }
1165
1166 static int get_sysinfo(struct platform *p, struct system_info *sysinfo)
1167 {
1168         struct platform_powerpc *platform = p->platform_data;
1169         char *buf, *filename;
1170         int len, rc;
1171
1172         filename = talloc_asprintf(platform, "%smodel", devtree_dir);
1173         rc = read_file(platform, filename, &buf, &len);
1174         if (rc == 0)
1175                 sysinfo->type = talloc_steal(sysinfo, buf);
1176         talloc_free(filename);
1177
1178         filename = talloc_asprintf(platform, "%ssystem-id", devtree_dir);
1179         rc = read_file(platform, filename, &buf, &len);
1180         if (rc == 0)
1181                 sysinfo->identifier = talloc_steal(sysinfo, buf);
1182         talloc_free(filename);
1183
1184         sysinfo->bmc_mac = talloc_zero_size(sysinfo, HWADDR_SIZE);
1185         if (platform->ipmi)
1186                 get_ipmi_bmc_mac(p, sysinfo->bmc_mac);
1187
1188         if (platform->ipmi)
1189                 get_ipmi_bmc_versions(p, sysinfo);
1190
1191         if (platform->get_platform_versions)
1192                 platform->get_platform_versions(sysinfo);
1193
1194         return 0;
1195 }
1196
1197 static bool probe(struct platform *p, void *ctx)
1198 {
1199         struct platform_powerpc *platform;
1200         struct stat statbuf;
1201         int rc;
1202
1203         /* we need a device tree */
1204         rc = stat("/proc/device-tree", &statbuf);
1205         if (rc)
1206                 return false;
1207
1208         if (!S_ISDIR(statbuf.st_mode))
1209                 return false;
1210
1211         platform = talloc_zero(ctx, struct platform_powerpc);
1212         list_init(&platform->params);
1213
1214         p->platform_data = platform;
1215
1216         if (ipmi_present()) {
1217                 pb_debug("platform: using direct IPMI for IPMI paramters\n");
1218                 platform->ipmi = ipmi_open(platform);
1219                 platform->get_ipmi_bootdev = get_ipmi_bootdev_ipmi;
1220                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_ipmi;
1221                 platform->set_os_boot_sensor = set_ipmi_os_boot_sensor;
1222         } else if (!stat(sysparams_dir, &statbuf)) {
1223                 pb_debug("platform: using sysparams for IPMI paramters\n");
1224                 platform->get_ipmi_bootdev = get_ipmi_bootdev_sysparams;
1225                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_sysparams;
1226
1227         } else {
1228                 pb_log("platform: no IPMI parameter support\n");
1229         }
1230
1231         rc = stat("/proc/device-tree/bmc", &statbuf);
1232         if (!rc)
1233                 platform->get_platform_versions = hostboot_load_versions;
1234
1235         return true;
1236 }
1237
1238
1239 static struct platform platform_powerpc = {
1240         .name                   = "powerpc",
1241         .dhcp_arch_id           = 0x000e,
1242         .probe                  = probe,
1243         .load_config            = load_config,
1244         .save_config            = save_config,
1245         .pre_boot               = pre_boot,
1246         .get_sysinfo            = get_sysinfo,
1247 };
1248
1249 register_platform(platform_powerpc);