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
  18 #include "platform.h"
  19 #include "ipmi.h"
  20 #include "dt.h"
  21
  22 static const char *partition = "common";
  23 static const char *sysparams_dir = "/sys/firmware/opal/sysparams/";
  24 static const char *devtree_dir = "/proc/device-tree/";
  25 static const int ipmi_timeout = 500; /* milliseconds */
  26
  27 struct param {
  28         char                    *name;
  29         char                    *value;
  30         bool                    modified;
  31         struct list_item        list;
  32 };
  33
  34 struct platform_powerpc {
  35         struct list     params;
  36         struct ipmi     *ipmi;
  37         bool            ipmi_bootdev_persistent;
  38         int             (*get_ipmi_bootdev)(
  39                                 struct platform_powerpc *platform,
  40                                 uint8_t *bootdev, bool *persistent);
  41         int             (*clear_ipmi_bootdev)(
  42                                 struct platform_powerpc *platform,
  43                                 bool persistent);
  44         int             (*set_os_boot_sensor)(
  45                                 struct platform_powerpc *platform);
  46 };
  47
  48 static const char *known_params[] = {
  49         "auto-boot?",
  50         "petitboot,network",
  51         "petitboot,timeout",
  52         "petitboot,bootdev",
  53         "petitboot,bootdevs",
  54         "petitboot,language",
  55         "petitboot,debug?",
  56         "petitboot,write?",
  57         "petitboot,snapshots?",
  58         NULL,
  59 };
  60
  61 #define to_platform_powerpc(p) \
  62         (struct platform_powerpc *)(p->platform_data)
  63
  64 /* a partition max a max size of 64k * 16bytes = 1M */
  65 static const int max_partition_size = 64 * 1024 * 16;
  66
  67 static bool param_is_known(const char *param, unsigned int len)
  68 {
  69         const char *known_param;
  70         unsigned int i;
  71
  72         for (i = 0; known_params[i]; i++) {
  73                 known_param = known_params[i];
  74                 if (len == strlen(known_param) &&
  75                                 !strncmp(param, known_param, len))
  76                         return true;
  77         }
  78
  79         return false;
  80 }
  81
  82 static int parse_nvram_params(struct platform_powerpc *platform,
  83                 char *buf, int len)
  84 {
  85         char *pos, *name, *value;
  86         unsigned int paramlen;
  87         int i, count;
  88
  89         /* discard 2 header lines:
  90          * "common" partiton"
  91          * ------------------
  92          */
  93         pos = buf;
  94         count = 0;
  95
  96         for (i = 0; i < len; i++) {
  97                 if (pos[i] == '\n')
  98                         count++;
  99                 if (count == 2)
 100                         break;
 101         }
 102
 103         if (i == len) {
 104                 fprintf(stderr, "failure parsing nvram output\n");
 105                 return -1;
 106         }
 107
 108         for (pos = buf + i; pos < buf + len; pos += paramlen + 1) {
 109                 unsigned int namelen;
 110                 struct param *param;
 111                 char *newline;
 112
 113                 newline = strchr(pos, '\n');
 114                 if (!newline)
 115                         break;
 116
 117                 *newline = '\0';
 118
 119                 paramlen = strlen(pos);
 120
 121                 name = pos;
 122                 value = strchr(pos, '=');
 123                 if (!value)
 124                         continue;
 125
 126                 namelen = value - name;
 127                 if (namelen == 0)
 128                         continue;
 129
 130                 if (!param_is_known(name, namelen))
 131                         continue;
 132
 133                 value++;
 134
 135                 param = talloc(platform, struct param);
 136                 param->modified = false;
 137                 param->name = talloc_strndup(platform, name, namelen);
 138                 param->value = talloc_strdup(platform, value);
 139                 list_add(&platform->params, &param->list);
 140         }
 141
 142         return 0;
 143 }
 144
 145 static int parse_nvram(struct platform_powerpc *platform)
 146 {
 147         struct process *process;
 148         const char *argv[5];
 149         int rc;
 150
 151         argv[0] = "nvram";
 152         argv[1] = "--print-config";
 153         argv[2] = "--partition";
 154         argv[3] = partition;
 155         argv[4] = NULL;
 156
 157         process = process_create(platform);
 158         process->path = "nvram";
 159         process->argv = argv;
 160         process->keep_stdout = true;
 161
 162         rc = process_run_sync(process);
 163
 164         if (rc || !process_exit_ok(process)) {
 165                 fprintf(stderr, "nvram process returned "
 166                                 "non-zero exit status\n");
 167                 rc = -1;
 168         } else {
 169                 rc = parse_nvram_params(platform, process->stdout_buf,
 170                                             process->stdout_len);
 171         }
 172
 173         process_release(process);
 174         return rc;
 175 }
 176
 177 static int write_nvram(struct platform_powerpc *platform)
 178 {
 179         struct process *process;
 180         struct param *param;
 181         const char *argv[6];
 182         int rc;
 183
 184         argv[0] = "nvram";
 185         argv[1] = "--update-config";
 186         argv[2] = NULL;
 187         argv[3] = "--partition";
 188         argv[4] = partition;
 189         argv[5] = NULL;
 190
 191         process = process_create(platform);
 192         process->path = "nvram";
 193         process->argv = argv;
 194
 195         list_for_each_entry(&platform->params, param, list) {
 196                 char *paramstr;
 197
 198                 if (!param->modified)
 199                         continue;
 200
 201                 paramstr = talloc_asprintf(platform, "%s=%s",
 202                                 param->name, param->value);
 203                 argv[2] = paramstr;
 204
 205                 rc = process_run_sync(process);
 206
 207                 talloc_free(paramstr);
 208
 209                 if (rc || !process_exit_ok(process)) {
 210                         rc = -1;
 211                         pb_log("nvram update process returned "
 212                                         "non-zero exit status\n");
 213                         break;
 214                 }
 215         }
 216
 217         process_release(process);
 218         return rc;
 219 }
 220
 221 static const char *get_param(struct platform_powerpc *platform,
 222                 const char *name)
 223 {
 224         struct param *param;
 225
 226         list_for_each_entry(&platform->params, param, list)
 227                 if (!strcmp(param->name, name))
 228                         return param->value;
 229         return NULL;
 230 }
 231
 232 static void set_param(struct platform_powerpc *platform, const char *name,
 233                 const char *value)
 234 {
 235         struct param *param;
 236
 237         list_for_each_entry(&platform->params, param, list) {
 238                 if (strcmp(param->name, name))
 239                         continue;
 240
 241                 if (!strcmp(param->value, value))
 242                         return;
 243
 244                 talloc_free(param->value);
 245                 param->value = talloc_strdup(param, value);
 246                 param->modified = true;
 247                 return;
 248         }
 249
 250
 251         param = talloc(platform, struct param);
 252         param->modified = true;
 253         param->name = talloc_strdup(platform, name);
 254         param->value = talloc_strdup(platform, value);
 255         list_add(&platform->params, &param->list);
 256 }
 257
 258 static int parse_hwaddr(struct interface_config *ifconf, char *str)
 259 {
 260         int i;
 261
 262         if (strlen(str) != strlen("00:00:00:00:00:00"))
 263                 return -1;
 264
 265         for (i = 0; i < HWADDR_SIZE; i++) {
 266                 char byte[3], *endp;
 267                 unsigned long x;
 268
 269                 byte[0] = str[i * 3 + 0];
 270                 byte[1] = str[i * 3 + 1];
 271                 byte[2] = '\0';
 272
 273                 x = strtoul(byte, &endp, 16);
 274                 if (endp != byte + 2)
 275                         return -1;
 276
 277                 ifconf->hwaddr[i] = x & 0xff;
 278         }
 279
 280         return 0;
 281 }
 282
 283 static int parse_one_interface_config(struct config *config,
 284                 char *confstr)
 285 {
 286         struct interface_config *ifconf;
 287         char *tok, *saveptr;
 288
 289         ifconf = talloc_zero(config, struct interface_config);
 290
 291         if (!confstr || !strlen(confstr))
 292                 goto out_err;
 293
 294         /* first token should be the mac address */
 295         tok = strtok_r(confstr, ",", &saveptr);
 296         if (!tok)
 297                 goto out_err;
 298
 299         if (parse_hwaddr(ifconf, tok))
 300                 goto out_err;
 301
 302         /* second token is the method */
 303         tok = strtok_r(NULL, ",", &saveptr);
 304         if (!tok || !strlen(tok) || !strcmp(tok, "ignore")) {
 305                 ifconf->ignore = true;
 306
 307         } else if (!strcmp(tok, "dhcp")) {
 308                 ifconf->method = CONFIG_METHOD_DHCP;
 309
 310         } else if (!strcmp(tok, "static")) {
 311                 ifconf->method = CONFIG_METHOD_STATIC;
 312
 313                 /* ip/mask, [optional] gateway */
 314                 tok = strtok_r(NULL, ",", &saveptr);
 315                 if (!tok)
 316                         goto out_err;
 317                 ifconf->static_config.address =
 318                         talloc_strdup(ifconf, tok);
 319
 320                 tok = strtok_r(NULL, ",", &saveptr);
 321                 if (tok) {
 322                         ifconf->static_config.gateway =
 323                                 talloc_strdup(ifconf, tok);
 324                 }
 325
 326         } else {
 327                 pb_log("Unknown network configuration method %s\n", tok);
 328                 goto out_err;
 329         }
 330
 331         config->network.interfaces = talloc_realloc(config,
 332                         config->network.interfaces,
 333                         struct interface_config *,
 334                         ++config->network.n_interfaces);
 335
 336         config->network.interfaces[config->network.n_interfaces - 1] = ifconf;
 337
 338         return 0;
 339 out_err:
 340         talloc_free(ifconf);
 341         return -1;
 342 }
 343
 344 static int parse_one_dns_config(struct config *config,
 345                 char *confstr)
 346 {
 347         char *tok, *saveptr = NULL;
 348
 349         for (tok = strtok_r(confstr, ",", &saveptr); tok;
 350                         tok = strtok_r(NULL, ",", &saveptr)) {
 351
 352                 char *server = talloc_strdup(config, tok);
 353
 354                 config->network.dns_servers = talloc_realloc(config,
 355                                 config->network.dns_servers, const char *,
 356                                 ++config->network.n_dns_servers);
 357
 358                 config->network.dns_servers[config->network.n_dns_servers - 1]
 359                                 = server;
 360         }
 361
 362         return 0;
 363 }
 364
 365 static void populate_network_config(struct platform_powerpc *platform,
 366                 struct config *config)
 367 {
 368         char *val, *saveptr = NULL;
 369         const char *cval;
 370         int i;
 371
 372         cval = get_param(platform, "petitboot,network");
 373         if (!cval || !strlen(cval))
 374                 return;
 375
 376         val = talloc_strdup(config, cval);
 377
 378         for (i = 0; ; i++) {
 379                 char *tok;
 380
 381                 tok = strtok_r(i == 0 ? val : NULL, " ", &saveptr);
 382                 if (!tok)
 383                         break;
 384
 385                 if (!strncasecmp(tok, "dns,", strlen("dns,")))
 386                         parse_one_dns_config(config, tok + strlen("dns,"));
 387                 else
 388                         parse_one_interface_config(config, tok);
 389
 390         }
 391
 392         talloc_free(val);
 393 }
 394
 395 static int read_bootdev(void *ctx, char **pos, struct autoboot_option *opt)
 396 {
 397         char *delim = strchr(*pos, ' ');
 398         int len, prefix = 0, rc = -1;
 399         enum device_type type;
 400
 401         if (!strncmp(*pos, "uuid:", strlen("uuid:"))) {
 402                 prefix = strlen("uuid:");
 403                 opt->boot_type = BOOT_DEVICE_UUID;
 404                 rc = 0;
 405         } else if (!strncmp(*pos, "mac:", strlen("mac:"))) {
 406                 prefix = strlen("mac:");
 407                 opt->boot_type = BOOT_DEVICE_UUID;
 408                 rc = 0;
 409         } else {
 410                 type = find_device_type(*pos);
 411                 if (type != DEVICE_TYPE_UNKNOWN) {
 412                         opt->type = type;
 413                         opt->boot_type = BOOT_DEVICE_TYPE;
 414                         rc = 0;
 415                 }
 416         }
 417
 418         if (opt->boot_type == BOOT_DEVICE_UUID) {
 419                 if (delim)
 420                         len = (int)(delim - *pos) - prefix;
 421                 else
 422                         len = strlen(*pos);
 423
 424                 opt->uuid = talloc_strndup(ctx, *pos + prefix, len);
 425         }
 426
 427         /* Always advance pointer to next option or end */
 428         if (delim)
 429                 *pos = delim + 1;
 430         else
 431                 *pos += strlen(*pos);
 432
 433         return rc;
 434 }
 435
 436 static void populate_bootdev_config(struct platform_powerpc *platform,
 437                 struct config *config)
 438 {
 439         struct autoboot_option *opt, *new = NULL;
 440         char *pos, *end, *old_dev = NULL;
 441         const char delim = ' ';
 442         unsigned int n_new = 0;
 443         const char *val;
 444         bool conflict;
 445
 446         /* Check for old-style bootdev */
 447         val = get_param(platform, "petitboot,bootdev");
 448         if (val && strlen(val)) {
 449                 pos = talloc_strdup(config, val);
 450                 if (!strncmp(val, "uuid:", strlen("uuid:")))
 451                         old_dev = talloc_strdup(config,
 452                                                 val + strlen("uuid:"));
 453                 else if (!strncmp(val, "mac:", strlen("mac:")))
 454                         old_dev = talloc_strdup(config,
 455                                                 val + strlen("mac:"));
 456         }
 457
 458         /* Check for ordered bootdevs */
 459         val = get_param(platform, "petitboot,bootdevs");
 460         if (!val || !strlen(val)) {
 461                 pos = end = NULL;
 462         } else {
 463                 pos = talloc_strdup(config, val);
 464                 end = strchr(pos, '\0');
 465         }
 466
 467         while (pos && pos < end) {
 468                 opt = talloc(config, struct autoboot_option);
 469
 470                 if (read_bootdev(config, &pos, opt)) {
 471                         pb_log("bootdev config is in an unknown format "
 472                                "(expected uuid:... or mac:...)");
 473                         talloc_free(opt);
 474                         if (strchr(pos, delim))
 475                                 continue;
 476                         return;
 477                 }
 478
 479                 new = talloc_realloc(config, new, struct autoboot_option,
 480                                      n_new + 1);
 481                 new[n_new] = *opt;
 482                 n_new++;
 483                 talloc_free(opt);
 484
 485         }
 486
 487         if (!n_new && !old_dev) {
 488                 /* If autoboot has been disabled, clear the default options */
 489                 if (!config->autoboot_enabled) {
 490                         talloc_free(config->autoboot_opts);
 491                         config->n_autoboot_opts = 0;
 492                 }
 493                 return;
 494         }
 495
 496         conflict = old_dev && (!n_new ||
 497                                     new[0].boot_type == BOOT_DEVICE_TYPE ||
 498                                     /* Canonical UUIDs are 36 characters long */
 499                                     strncmp(new[0].uuid, old_dev, 36));
 500
 501         if (!conflict) {
 502                 talloc_free(config->autoboot_opts);
 503                 config->autoboot_opts = new;
 504                 config->n_autoboot_opts = n_new;
 505                 return;
 506         }
 507
 508         /*
 509          * Difference detected, defer to old format in case it has been updated
 510          * recently
 511          */
 512         pb_debug("Old autoboot bootdev detected\n");
 513         talloc_free(config->autoboot_opts);
 514         config->autoboot_opts = talloc(config, struct autoboot_option);
 515         config->autoboot_opts[0].boot_type = BOOT_DEVICE_UUID;
 516         config->autoboot_opts[0].uuid = talloc_strdup(config, old_dev);
 517         config->n_autoboot_opts = 1;
 518 }
 519
 520 static void populate_config(struct platform_powerpc *platform,
 521                 struct config *config)
 522 {
 523         const char *val;
 524         char *end;
 525         unsigned long timeout;
 526
 527         /* if the "auto-boot?' property is present and "false", disable auto
 528          * boot */
 529         val = get_param(platform, "auto-boot?");
 530         config->autoboot_enabled = !val || strcmp(val, "false");
 531
 532         val = get_param(platform, "petitboot,timeout");
 533         if (val) {
 534                 timeout = strtoul(val, &end, 10);
 535                 if (end != val) {
 536                         if (timeout >= INT_MAX)
 537                                 timeout = INT_MAX;
 538                         config->autoboot_timeout_sec = (int)timeout;
 539                 }
 540         }
 541
 542         val = get_param(platform, "petitboot,language");
 543         config->lang = val ? talloc_strdup(config, val) : NULL;
 544
 545         populate_network_config(platform, config);
 546
 547         populate_bootdev_config(platform, config);
 548
 549         if (!config->debug) {
 550                 val = get_param(platform, "petitboot,debug?");
 551                 config->debug = val && !strcmp(val, "true");
 552         }
 553
 554         val = get_param(platform, "petitboot,write?");
 555         if (val)
 556                 config->allow_writes = !strcmp(val, "true");
 557
 558         val = get_param(platform, "petitboot,snapshots?");
 559         if (val)
 560                 config->disable_snapshots = !strcmp(val, "false");
 561 }
 562
 563 static char *iface_config_str(void *ctx, struct interface_config *config)
 564 {
 565         char *str;
 566
 567         /* todo: HWADDR size is hardcoded as 6, but we may need to handle
 568          * different hardware address formats */
 569         str = talloc_asprintf(ctx, "%02x:%02x:%02x:%02x:%02x:%02x,",
 570                         config->hwaddr[0], config->hwaddr[1],
 571                         config->hwaddr[2], config->hwaddr[3],
 572                         config->hwaddr[4], config->hwaddr[5]);
 573
 574         if (config->ignore) {
 575                 str = talloc_asprintf_append(str, "ignore");
 576
 577         } else if (config->method == CONFIG_METHOD_DHCP) {
 578                 str = talloc_asprintf_append(str, "dhcp");
 579
 580         } else if (config->method == CONFIG_METHOD_STATIC) {
 581                 str = talloc_asprintf_append(str, "static,%s%s%s",
 582                                 config->static_config.address,
 583                                 config->static_config.gateway ? "," : "",
 584                                 config->static_config.gateway ?: "");
 585         }
 586         return str;
 587 }
 588
 589 static char *dns_config_str(void *ctx, const char **dns_servers, int n)
 590 {
 591         char *str;
 592         int i;
 593
 594         str = talloc_strdup(ctx, "dns,");
 595         for (i = 0; i < n; i++) {
 596                 str = talloc_asprintf_append(str, "%s%s",
 597                                 i == 0 ? "" : ",",
 598                                 dns_servers[i]);
 599         }
 600
 601         return str;
 602 }
 603
 604 static void update_string_config(struct platform_powerpc *platform,
 605                 const char *name, const char *value)
 606 {
 607         const char *cur;
 608
 609         cur = get_param(platform, name);
 610
 611         /* don't set an empty parameter if it doesn't already exist */
 612         if (!cur && !strlen(value))
 613                 return;
 614
 615         set_param(platform, name, value);
 616 }
 617
 618 static void update_network_config(struct platform_powerpc *platform,
 619         struct config *config)
 620 {
 621         unsigned int i;
 622         char *val;
 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, *first = NULL;
 652         struct autoboot_option *opt;
 653         const char delim = ' ';
 654         unsigned int i;
 655
 656         if (!config->n_autoboot_opts)
 657                 first = val = "";
 658         else if (config->autoboot_opts[0].boot_type == BOOT_DEVICE_UUID)
 659                 first = talloc_asprintf(config, "uuid:%s",
 660                                         config->autoboot_opts[0].uuid);
 661         else
 662                 first = "";
 663
 664         for (i = 0; i < config->n_autoboot_opts; i++) {
 665                 opt = &config->autoboot_opts[i];
 666                 switch (opt->boot_type) {
 667                         case BOOT_DEVICE_TYPE:
 668                                 boot_str = talloc_asprintf(config, "%s%c",
 669                                                 device_type_name(opt->type),
 670                                                 delim);
 671                                 break;
 672                         case BOOT_DEVICE_UUID:
 673                                 boot_str = talloc_asprintf(config, "uuid:%s%c",
 674                                                 opt->uuid, delim);
 675                                 break;
 676                         }
 677                         tmp = val = talloc_asprintf_append(val, "%s", boot_str);
 678         }
 679
 680         update_string_config(platform, "petitboot,bootdevs", val);
 681         update_string_config(platform, "petitboot,bootdev", first);
 682         talloc_free(tmp);
 683         if (boot_str)
 684                 talloc_free(boot_str);
 685 }
 686
 687 static int update_config(struct platform_powerpc *platform,
 688                 struct config *config, struct config *defaults)
 689 {
 690         char *tmp = NULL;
 691         const char *val;
 692
 693         if (config->autoboot_enabled == defaults->autoboot_enabled)
 694                 val = "";
 695         else
 696                 val = config->autoboot_enabled ? "true" : "false";
 697         update_string_config(platform, "auto-boot?", val);
 698
 699         if (config->autoboot_timeout_sec == defaults->autoboot_timeout_sec)
 700                 val = "";
 701         else
 702                 val = tmp = talloc_asprintf(platform, "%d",
 703                                 config->autoboot_timeout_sec);
 704
 705         if (config->ipmi_bootdev == IPMI_BOOTDEV_INVALID &&
 706             platform->clear_ipmi_bootdev) {
 707                 platform->clear_ipmi_bootdev(platform,
 708                                 config->ipmi_bootdev_persistent);
 709                 config->ipmi_bootdev = IPMI_BOOTDEV_NONE;
 710                 config->ipmi_bootdev_persistent = false;
 711         }
 712
 713         update_string_config(platform, "petitboot,timeout", val);
 714         if (tmp)
 715                 talloc_free(tmp);
 716
 717         val = config->lang ?: "";
 718         update_string_config(platform, "petitboot,language", val);
 719
 720         if (config->allow_writes == defaults->allow_writes)
 721                 val = "";
 722         else
 723                 val = config->allow_writes ? "true" : "false";
 724         update_string_config(platform, "petitboot,write?", val);
 725
 726         update_network_config(platform, config);
 727
 728         update_bootdev_config(platform, config);
 729
 730         return write_nvram(platform);
 731 }
 732
 733 static void set_ipmi_bootdev(struct config *config, enum ipmi_bootdev bootdev,
 734                 bool persistent)
 735 {
 736         config->ipmi_bootdev = bootdev;
 737         config->ipmi_bootdev_persistent = persistent;
 738
 739         switch (bootdev) {
 740         case IPMI_BOOTDEV_NONE:
 741         case IPMI_BOOTDEV_DISK:
 742         case IPMI_BOOTDEV_NETWORK:
 743         case IPMI_BOOTDEV_CDROM:
 744         default:
 745                 break;
 746         case IPMI_BOOTDEV_SETUP:
 747                 config->autoboot_enabled = false;
 748                 break;
 749         case IPMI_BOOTDEV_SAFE:
 750                 config->autoboot_enabled = false;
 751                 config->safe_mode = true;
 752                 break;
 753         }
 754 }
 755
 756 static int read_bootdev_sysparam(const char *name, uint8_t *val)
 757 {
 758         uint8_t buf[2];
 759         char path[50];
 760         int fd, rc;
 761
 762         strcpy(path, sysparams_dir);
 763         assert(strlen(name) < sizeof(path) - strlen(path));
 764         strcat(path, name);
 765
 766         fd = open(path, O_RDONLY);
 767         if (fd < 0) {
 768                 pb_debug("powerpc: can't access sysparam %s\n",
 769                                 name);
 770                 return -1;
 771         }
 772
 773         rc = read(fd, buf, sizeof(buf));
 774
 775         close(fd);
 776
 777         /* bootdev definitions should only be one byte in size */
 778         if (rc != 1) {
 779                 pb_debug("powerpc: sysparam %s read returned %d\n",
 780                                 name, rc);
 781                 return -1;
 782         }
 783
 784         pb_debug("powerpc: sysparam %s: 0x%02x\n", name, buf[0]);
 785
 786         if (!ipmi_bootdev_is_valid(buf[0]))
 787                 return -1;
 788
 789         *val = buf[0];
 790         return 0;
 791 }
 792
 793 static int write_bootdev_sysparam(const char *name, uint8_t val)
 794 {
 795         char path[50];
 796         int fd, rc;
 797
 798         strcpy(path, sysparams_dir);
 799         assert(strlen(name) < sizeof(path) - strlen(path));
 800         strcat(path, name);
 801
 802         fd = open(path, O_WRONLY);
 803         if (fd < 0) {
 804                 pb_debug("powerpc: can't access sysparam %s for writing\n",
 805                                 name);
 806                 return -1;
 807         }
 808
 809         for (;;) {
 810                 errno = 0;
 811                 rc = write(fd, &val, sizeof(val));
 812                 if (rc == sizeof(val)) {
 813                         rc = 0;
 814                         break;
 815                 }
 816
 817                 if (rc <= 0 && errno != EINTR) {
 818                         pb_log("powerpc: error updating sysparam %s: %s",
 819                                         name, strerror(errno));
 820                         rc = -1;
 821                         break;
 822                 }
 823         }
 824
 825         close(fd);
 826
 827         if (!rc)
 828                 pb_debug("powerpc: set sysparam %s: 0x%02x\n", name, val);
 829
 830         return rc;
 831 }
 832
 833 static int clear_ipmi_bootdev_sysparams(
 834                 struct platform_powerpc *platform __attribute__((unused)),
 835                 bool persistent)
 836 {
 837         if (persistent) {
 838                 /* invalidate default-boot-device setting */
 839                 write_bootdev_sysparam("default-boot-device", 0xff);
 840         } else {
 841                 /* invalidate next-boot-device setting */
 842                 write_bootdev_sysparam("next-boot-device", 0xff);
 843         }
 844         return 0;
 845 }
 846
 847 static int get_ipmi_bootdev_sysparams(
 848                 struct platform_powerpc *platform __attribute__((unused)),
 849                 uint8_t *bootdev, bool *persistent)
 850 {
 851         uint8_t next_bootdev, default_bootdev;
 852         bool next_valid, default_valid;
 853         int rc;
 854
 855         rc = read_bootdev_sysparam("next-boot-device", &next_bootdev);
 856         next_valid = rc == 0;
 857
 858         rc = read_bootdev_sysparam("default-boot-device", &default_bootdev);
 859         default_valid = rc == 0;
 860
 861         /* nothing valid? no need to change the config */
 862         if (!next_valid && !default_valid)
 863                 return -1;
 864
 865         *persistent = !next_valid;
 866         *bootdev = next_valid ? next_bootdev : default_bootdev;
 867         return 0;
 868 }
 869
 870 static int clear_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 871                                    bool persistent __attribute__((unused)))
 872 {
 873         uint16_t resp_len;
 874         uint8_t resp[1];
 875         uint8_t req[] = {
 876                 0x05, /* parameter selector: boot flags */
 877                 0x80, /* data 1: valid */
 878                 0x00, /* data 2: bootdev: no override */
 879                 0x00, /* data 3: system defaults */
 880                 0x00, /* data 4: no request for shared mode, mux defaults */
 881                 0x00, /* data 5: no instance request */
 882         };
 883
 884         resp_len = sizeof(resp);
 885
 886         ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 887                         IPMI_CMD_CHASSIS_SET_SYSTEM_BOOT_OPTIONS,
 888                         req, sizeof(req),
 889                         resp, &resp_len,
 890                         ipmi_timeout);
 891         return 0;
 892 }
 893
 894 static int get_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 895                 uint8_t *bootdev, bool *persistent)
 896 {
 897         uint16_t resp_len;
 898         uint8_t resp[8];
 899         int rc;
 900         uint8_t req[] = {
 901                 0x05, /* parameter selector: boot flags */
 902                 0x00, /* no set selector */
 903                 0x00, /* no block selector */
 904         };
 905
 906         resp_len = sizeof(resp);
 907         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 908                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
 909                         req, sizeof(req),
 910                         resp, &resp_len,
 911                         ipmi_timeout);
 912         if (rc) {
 913                 pb_log("platform: error reading IPMI boot options\n");
 914                 return -1;
 915         }
 916
 917         if (resp_len != sizeof(resp)) {
 918                 pb_log("platform: unexpected length (%d) in "
 919                                 "boot options response\n", resp_len);
 920                 return -1;
 921         }
 922
 923         if (resp[0] != 0) {
 924                 pb_log("platform: non-zero completion code %d from IPMI req\n",
 925                                 resp[0]);
 926                 return -1;
 927         }
 928
 929         /* check for correct parameter version */
 930         if ((resp[1] & 0xf) != 0x1) {
 931                 pb_log("platform: unexpected version (0x%x) in "
 932                                 "boot options response\n", resp[0]);
 933                 return -1;
 934         }
 935
 936         /* check for valid paramters */
 937         if (resp[2] & 0x80) {
 938                 pb_debug("platform: boot options are invalid/locked\n");
 939                 return -1;
 940         }
 941
 942         *persistent = false;
 943
 944         /* check for valid flags */
 945         if (!(resp[3] & 0x80)) {
 946                 pb_debug("platform: boot flags are invalid, ignoring\n");
 947                 return 0;
 948         }
 949
 950         *persistent = resp[3] & 0x40;
 951         *bootdev = (resp[4] >> 2) & 0x0f;
 952         return 0;
 953 }
 954
 955 static int set_ipmi_os_boot_sensor(struct platform_powerpc *platform)
 956 {
 957         int sensor_number;
 958         uint16_t resp_len;
 959         uint8_t resp[1];
 960         uint8_t req[] = {
 961                 0x00, /* sensor number: os boot */
 962                 0xA9, /* operation: set everything */
 963                 0x00, /* sensor reading: none */
 964                 0x40, /* assertion mask lsb: set state 6 */
 965                 0x00, /* assertion mask msb: none */
 966                 0x00, /* deassertion mask lsb: none */
 967                 0x00, /* deassertion mask msb: none */
 968                 0x00, /* event data 1: none */
 969                 0x00, /* event data 2: none */
 970                 0x00, /* event data 3: none */
 971         };
 972
 973         sensor_number = get_ipmi_sensor(platform, IPMI_SENSOR_ID_OS_BOOT);
 974         if (sensor_number < 0) {
 975                 pb_log("Couldn't find OS boot sensor in device tree\n");
 976                 return -1;
 977         }
 978
 979         req[0] = sensor_number;
 980
 981         resp_len = sizeof(resp);
 982
 983         ipmi_transaction(platform->ipmi, IPMI_NETFN_SE,
 984                         IPMI_CMD_SENSOR_SET,
 985                         req, sizeof(req),
 986                         resp, &resp_len,
 987                         ipmi_timeout); return 0;
 988
 989         return 0;
 990 }
 991
 992 static int load_config(struct platform *p, struct config *config)
 993 {
 994         struct platform_powerpc *platform = to_platform_powerpc(p);
 995         int rc;
 996
 997         rc = parse_nvram(platform);
 998         if (rc)
 999                 return rc;
1000
1001         populate_config(platform, config);
1002
1003         if (platform->get_ipmi_bootdev) {
1004                 bool bootdev_persistent;
1005                 uint8_t bootdev;
1006                 rc = platform->get_ipmi_bootdev(platform, &bootdev,
1007                                 &bootdev_persistent);
1008                 if (!rc && ipmi_bootdev_is_valid(bootdev)) {
1009                         set_ipmi_bootdev(config, bootdev, bootdev_persistent);
1010                 }
1011         }
1012
1013         return 0;
1014 }
1015
1016 static int save_config(struct platform *p, struct config *config)
1017 {
1018         struct platform_powerpc *platform = to_platform_powerpc(p);
1019         struct config *defaults;
1020         int rc;
1021
1022         defaults = talloc_zero(platform, struct config);
1023         config_set_defaults(defaults);
1024
1025         rc = update_config(platform, config, defaults);
1026
1027         talloc_free(defaults);
1028         return rc;
1029 }
1030
1031 static void pre_boot(struct platform *p, const struct config *config)
1032 {
1033         struct platform_powerpc *platform = to_platform_powerpc(p);
1034
1035         if (!config->ipmi_bootdev_persistent && platform->clear_ipmi_bootdev)
1036                 platform->clear_ipmi_bootdev(platform, false);
1037
1038         if (platform->set_os_boot_sensor)
1039                 platform->set_os_boot_sensor(platform);
1040 }
1041
1042 static int get_sysinfo(struct platform *p, struct system_info *sysinfo)
1043 {
1044         struct platform_powerpc *platform = p->platform_data;
1045         char *buf, *filename;
1046         int len, rc;
1047
1048         filename = talloc_asprintf(platform, "%smodel", devtree_dir);
1049         rc = read_file(platform, filename, &buf, &len);
1050         if (rc == 0)
1051                 sysinfo->type = talloc_steal(sysinfo, buf);
1052         talloc_free(filename);
1053
1054         filename = talloc_asprintf(platform, "%ssystem-id", devtree_dir);
1055         rc = read_file(platform, filename, &buf, &len);
1056         if (rc == 0)
1057                 sysinfo->identifier = talloc_steal(sysinfo, buf);
1058         talloc_free(filename);
1059
1060         return 0;
1061 }
1062
1063 static bool probe(struct platform *p, void *ctx)
1064 {
1065         struct platform_powerpc *platform;
1066         struct stat statbuf;
1067         int rc;
1068
1069         /* we need a device tree */
1070         rc = stat("/proc/device-tree", &statbuf);
1071         if (rc)
1072                 return false;
1073
1074         if (!S_ISDIR(statbuf.st_mode))
1075                 return false;
1076
1077         platform = talloc_zero(ctx, struct platform_powerpc);
1078         list_init(&platform->params);
1079
1080         p->platform_data = platform;
1081
1082         if (ipmi_present()) {
1083                 pb_debug("platform: using direct IPMI for IPMI paramters\n");
1084                 platform->ipmi = ipmi_open(platform);
1085                 platform->get_ipmi_bootdev = get_ipmi_bootdev_ipmi;
1086                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_ipmi;
1087                 platform->set_os_boot_sensor = set_ipmi_os_boot_sensor;
1088
1089         } else if (!stat(sysparams_dir, &statbuf)) {
1090                 pb_debug("platform: using sysparams for IPMI paramters\n");
1091                 platform->get_ipmi_bootdev = get_ipmi_bootdev_sysparams;
1092                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_sysparams;
1093
1094         } else {
1095                 pb_log("platform: no IPMI parameter support\n");
1096         }
1097
1098         return true;
1099 }
1100
1101
1102 static struct platform platform_powerpc = {
1103         .name                   = "powerpc",
1104         .dhcp_arch_id           = 0x000e,
1105         .probe                  = probe,
1106         .load_config            = load_config,
1107         .save_config            = save_config,
1108         .pre_boot               = pre_boot,
1109         .get_sysinfo            = get_sysinfo,
1110 };
1111
1112 register_platform(platform_powerpc);