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 <fcntl.h>
   8 #include <sys/types.h>
   9 #include <sys/wait.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 #include <url/url.h>
  20
  21 #include "hostboot.h"
  22 #include "platform.h"
  23 #include "ipmi.h"
  24 #include "dt.h"
  25
  26 static const char *partition = "common";
  27 static const char *sysparams_dir = "/sys/firmware/opal/sysparams/";
  28 static const char *devtree_dir = "/proc/device-tree/";
  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_stdout *stdout;
 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         rc = process_get_stdout_argv(NULL, &stdout, argv);
 161
 162         if (rc) {
 163                 fprintf(stderr, "nvram process returned "
 164                                 "non-zero exit status\n");
 165                 rc = -1;
 166         } else {
 167                 rc = parse_nvram_params(platform, stdout->buf, stdout->len);
 168         }
 169
 170         talloc_free(stdout);
 171         return rc;
 172 }
 173
 174 static int write_nvram(struct platform_powerpc *platform)
 175 {
 176         struct process *process;
 177         struct param *param;
 178         const char *argv[6];
 179         int rc = 0;
 180
 181         argv[0] = "nvram";
 182         argv[1] = "--update-config";
 183         argv[2] = NULL;
 184         argv[3] = "--partition";
 185         argv[4] = partition;
 186         argv[5] = NULL;
 187
 188         process = process_create(platform);
 189         process->path = "nvram";
 190         process->argv = argv;
 191
 192         list_for_each_entry(&platform->params, param, list) {
 193                 char *paramstr;
 194
 195                 if (!param->modified)
 196                         continue;
 197
 198                 paramstr = talloc_asprintf(platform, "%s=%s",
 199                                 param->name, param->value);
 200                 argv[2] = paramstr;
 201
 202                 rc = process_run_sync(process);
 203
 204                 talloc_free(paramstr);
 205
 206                 if (rc || !process_exit_ok(process)) {
 207                         rc = -1;
 208                         pb_log("nvram update process returned "
 209                                         "non-zero exit status\n");
 210                         break;
 211                 }
 212         }
 213
 214         process_release(process);
 215         return rc;
 216 }
 217
 218 static const char *get_param(struct platform_powerpc *platform,
 219                 const char *name)
 220 {
 221         struct param *param;
 222
 223         list_for_each_entry(&platform->params, param, list)
 224                 if (!strcmp(param->name, name))
 225                         return param->value;
 226         return NULL;
 227 }
 228
 229 static void set_param(struct platform_powerpc *platform, const char *name,
 230                 const char *value)
 231 {
 232         struct param *param;
 233
 234         list_for_each_entry(&platform->params, param, list) {
 235                 if (strcmp(param->name, name))
 236                         continue;
 237
 238                 if (!strcmp(param->value, value))
 239                         return;
 240
 241                 talloc_free(param->value);
 242                 param->value = talloc_strdup(param, value);
 243                 param->modified = true;
 244                 return;
 245         }
 246
 247
 248         param = talloc(platform, struct param);
 249         param->modified = true;
 250         param->name = talloc_strdup(platform, name);
 251         param->value = talloc_strdup(platform, value);
 252         list_add(&platform->params, &param->list);
 253 }
 254
 255 static int parse_hwaddr(struct interface_config *ifconf, char *str)
 256 {
 257         int i;
 258
 259         if (strlen(str) != strlen("00:00:00:00:00:00"))
 260                 return -1;
 261
 262         for (i = 0; i < HWADDR_SIZE; i++) {
 263                 char byte[3], *endp;
 264                 unsigned long x;
 265
 266                 byte[0] = str[i * 3 + 0];
 267                 byte[1] = str[i * 3 + 1];
 268                 byte[2] = '\0';
 269
 270                 x = strtoul(byte, &endp, 16);
 271                 if (endp != byte + 2)
 272                         return -1;
 273
 274                 ifconf->hwaddr[i] = x & 0xff;
 275         }
 276
 277         return 0;
 278 }
 279
 280 static int parse_one_interface_config(struct config *config,
 281                 char *confstr)
 282 {
 283         struct interface_config *ifconf;
 284         char *tok, *tok_gw, *tok_url, *saveptr;
 285
 286         ifconf = talloc_zero(config, struct interface_config);
 287
 288         if (!confstr || !strlen(confstr))
 289                 goto out_err;
 290
 291         /* first token should be the mac address */
 292         tok = strtok_r(confstr, ",", &saveptr);
 293         if (!tok)
 294                 goto out_err;
 295
 296         if (parse_hwaddr(ifconf, tok))
 297                 goto out_err;
 298
 299         /* second token is the method */
 300         tok = strtok_r(NULL, ",", &saveptr);
 301         if (!tok || !strlen(tok) || !strcmp(tok, "ignore")) {
 302                 ifconf->ignore = true;
 303
 304         } else if (!strcmp(tok, "dhcp")) {
 305                 ifconf->method = CONFIG_METHOD_DHCP;
 306
 307         } else if (!strcmp(tok, "static")) {
 308                 ifconf->method = CONFIG_METHOD_STATIC;
 309
 310                 /* ip/mask, [optional] gateway, [optional] url */
 311                 tok = strtok_r(NULL, ",", &saveptr);
 312                 if (!tok)
 313                         goto out_err;
 314                 ifconf->static_config.address =
 315                         talloc_strdup(ifconf, tok);
 316
 317                 /*
 318                  * If a url is set but not a gateway, we can accidentally
 319                  * interpret the url as the gateway. To avoid changing the
 320                  * parameter format check if the "gateway" is actually a
 321                  * pb-url if it's the last token.
 322                  */
 323                 tok_gw = strtok_r(NULL, ",", &saveptr);
 324                 tok_url = strtok_r(NULL, ",", &saveptr);
 325
 326                 if (tok_gw) {
 327                         if (tok_url || !is_url(tok_gw))
 328                                 ifconf->static_config.gateway =
 329                                         talloc_strdup(ifconf, tok_gw);
 330                         else
 331                                         tok_url = tok_gw;
 332                 }
 333
 334                 if (tok_url)
 335                         ifconf->static_config.url =
 336                                 talloc_strdup(ifconf, tok_url);
 337         } else {
 338                 pb_log("Unknown network configuration method %s\n", tok);
 339                 goto out_err;
 340         }
 341
 342         config->network.interfaces = talloc_realloc(config,
 343                         config->network.interfaces,
 344                         struct interface_config *,
 345                         ++config->network.n_interfaces);
 346
 347         config->network.interfaces[config->network.n_interfaces - 1] = ifconf;
 348
 349         return 0;
 350 out_err:
 351         talloc_free(ifconf);
 352         return -1;
 353 }
 354
 355 static int parse_one_dns_config(struct config *config,
 356                 char *confstr)
 357 {
 358         char *tok, *saveptr = NULL;
 359
 360         for (tok = strtok_r(confstr, ",", &saveptr); tok;
 361                         tok = strtok_r(NULL, ",", &saveptr)) {
 362
 363                 char *server = talloc_strdup(config, tok);
 364
 365                 config->network.dns_servers = talloc_realloc(config,
 366                                 config->network.dns_servers, const char *,
 367                                 ++config->network.n_dns_servers);
 368
 369                 config->network.dns_servers[config->network.n_dns_servers - 1]
 370                                 = server;
 371         }
 372
 373         return 0;
 374 }
 375
 376 static void populate_network_config(struct platform_powerpc *platform,
 377                 struct config *config)
 378 {
 379         char *val, *saveptr = NULL;
 380         const char *cval;
 381         int i;
 382
 383         cval = get_param(platform, "petitboot,network");
 384         if (!cval || !strlen(cval))
 385                 return;
 386
 387         val = talloc_strdup(config, cval);
 388
 389         for (i = 0; ; i++) {
 390                 char *tok;
 391
 392                 tok = strtok_r(i == 0 ? val : NULL, " ", &saveptr);
 393                 if (!tok)
 394                         break;
 395
 396                 if (!strncasecmp(tok, "dns,", strlen("dns,")))
 397                         parse_one_dns_config(config, tok + strlen("dns,"));
 398                 else
 399                         parse_one_interface_config(config, tok);
 400
 401         }
 402
 403         talloc_free(val);
 404 }
 405
 406 static int read_bootdev(void *ctx, char **pos, struct autoboot_option *opt)
 407 {
 408         char *delim = strchr(*pos, ' ');
 409         int len, prefix = 0, rc = -1;
 410         enum device_type type;
 411
 412         if (!strncmp(*pos, "uuid:", strlen("uuid:"))) {
 413                 prefix = strlen("uuid:");
 414                 opt->boot_type = BOOT_DEVICE_UUID;
 415         } else if (!strncmp(*pos, "mac:", strlen("mac:"))) {
 416                 prefix = strlen("mac:");
 417                 opt->boot_type = BOOT_DEVICE_UUID;
 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) - prefix;
 432
 433                 if (len) {
 434                         opt->uuid = talloc_strndup(ctx, *pos + prefix, len);
 435                         rc = 0;
 436                 }
 437         }
 438
 439         /* Always advance pointer to next option or end */
 440         if (delim)
 441                 *pos = delim + 1;
 442         else
 443                 *pos += strlen(*pos);
 444
 445         return rc;
 446 }
 447
 448 static void populate_bootdev_config(struct platform_powerpc *platform,
 449                 struct config *config)
 450 {
 451         struct autoboot_option *opt, *new = NULL;
 452         char *pos, *end;
 453         unsigned int n_new = 0;
 454         const char *val;
 455
 456         /* Check for ordered bootdevs */
 457         val = get_param(platform, "petitboot,bootdevs");
 458         if (!val || !strlen(val)) {
 459                 pos = end = NULL;
 460         } else {
 461                 pos = talloc_strdup(config, val);
 462                 end = strchr(pos, '\0');
 463         }
 464
 465         while (pos && pos < end) {
 466                 opt = talloc(config, struct autoboot_option);
 467
 468                 if (read_bootdev(config, &pos, opt)) {
 469                         pb_log("bootdev config is in an unknown format "
 470                                "(expected uuid:... or mac:...)\n");
 471                         talloc_free(opt);
 472                         continue;
 473                 }
 474
 475                 new = talloc_realloc(config, new, struct autoboot_option,
 476                                      n_new + 1);
 477                 new[n_new] = *opt;
 478                 n_new++;
 479                 talloc_free(opt);
 480
 481         }
 482
 483         if (!n_new) {
 484                 /* If autoboot has been disabled, clear the default options */
 485                 if (!config->autoboot_enabled) {
 486                         talloc_free(config->autoboot_opts);
 487                         config->n_autoboot_opts = 0;
 488                 }
 489                 return;
 490         }
 491
 492         talloc_free(config->autoboot_opts);
 493         config->autoboot_opts = new;
 494         config->n_autoboot_opts = n_new;
 495 }
 496
 497 static void populate_config(struct platform_powerpc *platform,
 498                 struct config *config)
 499 {
 500         const char *val;
 501         char *end;
 502         unsigned long timeout;
 503
 504         /* if the "auto-boot?' property is present and "false", disable auto
 505          * boot */
 506         val = get_param(platform, "auto-boot?");
 507         config->autoboot_enabled = !val || strcmp(val, "false");
 508
 509         val = get_param(platform, "petitboot,timeout");
 510         if (val) {
 511                 timeout = strtoul(val, &end, 10);
 512                 if (end != val) {
 513                         if (timeout >= INT_MAX)
 514                                 timeout = INT_MAX;
 515                         config->autoboot_timeout_sec = (int)timeout;
 516                 }
 517         }
 518
 519         val = get_param(platform, "petitboot,language");
 520         config->lang = val ? talloc_strdup(config, val) : NULL;
 521
 522         populate_network_config(platform, config);
 523
 524         populate_bootdev_config(platform, config);
 525
 526         if (!config->debug) {
 527                 val = get_param(platform, "petitboot,debug?");
 528                 config->debug = val && !strcmp(val, "true");
 529         }
 530
 531         val = get_param(platform, "petitboot,write?");
 532         if (val)
 533                 config->allow_writes = !strcmp(val, "true");
 534
 535         val = get_param(platform, "petitboot,snapshots?");
 536         if (val)
 537                 config->disable_snapshots = !strcmp(val, "false");
 538
 539         val = get_param(platform, "petitboot,console");
 540         if (val)
 541                 config->boot_console = talloc_strdup(config, val);
 542         /* If a full path is already set we don't want to override it */
 543         config->manual_console = config->boot_console &&
 544                                         !strchr(config->boot_console, '[');
 545
 546         val = get_param(platform, "petitboot,http_proxy");
 547         if (val)
 548                 config->http_proxy = talloc_strdup(config, val);
 549         val = get_param(platform, "petitboot,https_proxy");
 550         if (val)
 551                 config->https_proxy = talloc_strdup(config, val);
 552 }
 553
 554 static char *iface_config_str(void *ctx, struct interface_config *config)
 555 {
 556         char *str;
 557
 558         /* todo: HWADDR size is hardcoded as 6, but we may need to handle
 559          * different hardware address formats */
 560         str = talloc_asprintf(ctx, "%02x:%02x:%02x:%02x:%02x:%02x,",
 561                         config->hwaddr[0], config->hwaddr[1],
 562                         config->hwaddr[2], config->hwaddr[3],
 563                         config->hwaddr[4], config->hwaddr[5]);
 564
 565         if (config->ignore) {
 566                 str = talloc_asprintf_append(str, "ignore");
 567
 568         } else if (config->method == CONFIG_METHOD_DHCP) {
 569                 str = talloc_asprintf_append(str, "dhcp");
 570
 571         } else if (config->method == CONFIG_METHOD_STATIC) {
 572                 str = talloc_asprintf_append(str, "static,%s%s%s%s%s",
 573                                 config->static_config.address,
 574                                 config->static_config.gateway ? "," : "",
 575                                 config->static_config.gateway ?: "",
 576                                 config->static_config.url ? "," : "",
 577                                 config->static_config.url ?: "");
 578         }
 579         return str;
 580 }
 581
 582 static char *dns_config_str(void *ctx, const char **dns_servers, int n)
 583 {
 584         char *str;
 585         int i;
 586
 587         str = talloc_strdup(ctx, "dns,");
 588         for (i = 0; i < n; i++) {
 589                 str = talloc_asprintf_append(str, "%s%s",
 590                                 i == 0 ? "" : ",",
 591                                 dns_servers[i]);
 592         }
 593
 594         return str;
 595 }
 596
 597 static void update_string_config(struct platform_powerpc *platform,
 598                 const char *name, const char *value)
 599 {
 600         const char *cur;
 601
 602         cur = get_param(platform, name);
 603
 604         /* don't set an empty parameter if it doesn't already exist */
 605         if (!cur && !strlen(value))
 606                 return;
 607
 608         set_param(platform, name, value);
 609 }
 610
 611 static void update_network_config(struct platform_powerpc *platform,
 612         struct config *config)
 613 {
 614         unsigned int i;
 615         char *val;
 616
 617         /*
 618          * Don't store IPMI overrides to NVRAM. If this was a persistent
 619          * override it was already stored in NVRAM by
 620          * get_ipmi_network_override()
 621          */
 622         if (config->network.n_interfaces &&
 623                 config->network.interfaces[0]->override)
 624                 return;
 625
 626         val = talloc_strdup(platform, "");
 627
 628         for (i = 0; i < config->network.n_interfaces; i++) {
 629                 char *iface_str = iface_config_str(platform,
 630                                         config->network.interfaces[i]);
 631                 val = talloc_asprintf_append(val, "%s%s",
 632                                 *val == '\0' ? "" : " ", iface_str);
 633                 talloc_free(iface_str);
 634         }
 635
 636         if (config->network.n_dns_servers) {
 637                 char *dns_str = dns_config_str(platform,
 638                                                 config->network.dns_servers,
 639                                                 config->network.n_dns_servers);
 640                 val = talloc_asprintf_append(val, "%s%s",
 641                                 *val == '\0' ? "" : " ", dns_str);
 642                 talloc_free(dns_str);
 643         }
 644
 645         update_string_config(platform, "petitboot,network", val);
 646
 647         talloc_free(val);
 648 }
 649
 650 static void update_bootdev_config(struct platform_powerpc *platform,
 651                 struct config *config)
 652 {
 653         char *val = NULL, *boot_str = NULL, *tmp = NULL;
 654         struct autoboot_option *opt;
 655         const char delim = ' ';
 656         unsigned int i;
 657
 658         if (!config->n_autoboot_opts)
 659                 val = "";
 660
 661         for (i = 0; i < config->n_autoboot_opts; i++) {
 662                 opt = &config->autoboot_opts[i];
 663                 switch (opt->boot_type) {
 664                         case BOOT_DEVICE_TYPE:
 665                                 boot_str = talloc_asprintf(config, "%s%c",
 666                                                 device_type_name(opt->type),
 667                                                 delim);
 668                                 break;
 669                         case BOOT_DEVICE_UUID:
 670                                 boot_str = talloc_asprintf(config, "uuid:%s%c",
 671                                                 opt->uuid, delim);
 672                                 break;
 673                         }
 674                         tmp = val = talloc_asprintf_append(val, "%s", boot_str);
 675         }
 676
 677         update_string_config(platform, "petitboot,bootdevs", val);
 678         talloc_free(tmp);
 679         if (boot_str)
 680                 talloc_free(boot_str);
 681 }
 682
 683 static void update_config(struct platform_powerpc *platform,
 684                 struct config *config, struct config *defaults)
 685 {
 686         char *tmp = NULL;
 687         const char *val;
 688
 689         if (config->autoboot_enabled == defaults->autoboot_enabled)
 690                 val = "";
 691         else
 692                 val = config->autoboot_enabled ? "true" : "false";
 693         update_string_config(platform, "auto-boot?", val);
 694
 695         if (config->autoboot_timeout_sec == defaults->autoboot_timeout_sec)
 696                 val = "";
 697         else
 698                 val = tmp = talloc_asprintf(platform, "%d",
 699                                 config->autoboot_timeout_sec);
 700
 701         update_string_config(platform, "petitboot,timeout", val);
 702         if (tmp)
 703                 talloc_free(tmp);
 704
 705         val = config->lang ?: "";
 706         update_string_config(platform, "petitboot,language", val);
 707
 708         if (config->allow_writes == defaults->allow_writes)
 709                 val = "";
 710         else
 711                 val = config->allow_writes ? "true" : "false";
 712         update_string_config(platform, "petitboot,write?", val);
 713
 714         if (!config->manual_console) {
 715                 val = config->boot_console ?: "";
 716                 update_string_config(platform, "petitboot,console", val);
 717         }
 718
 719         val = config->http_proxy ?: "";
 720         update_string_config(platform, "petitboot,http_proxy", val);
 721         val = config->https_proxy ?: "";
 722         update_string_config(platform, "petitboot,https_proxy", val);
 723
 724         update_network_config(platform, config);
 725
 726         update_bootdev_config(platform, config);
 727 }
 728
 729 static void set_ipmi_bootdev(struct config *config, enum ipmi_bootdev bootdev,
 730                 bool persistent)
 731 {
 732         config->ipmi_bootdev = bootdev;
 733         config->ipmi_bootdev_persistent = persistent;
 734
 735         if (bootdev == IPMI_BOOTDEV_SAFE)
 736                 config->safe_mode = true;
 737 }
 738
 739 static int read_bootdev_sysparam(const char *name, uint8_t *val)
 740 {
 741         uint8_t buf[2];
 742         char path[50];
 743         int fd, rc;
 744
 745         assert(strlen(sysparams_dir) + strlen(name) < sizeof(path));
 746         snprintf(path, sizeof(path), "%s%s", sysparams_dir, name);
 747
 748         fd = open(path, O_RDONLY);
 749         if (fd < 0) {
 750                 pb_debug("powerpc: can't access sysparam %s\n",
 751                                 name);
 752                 return -1;
 753         }
 754
 755         rc = read(fd, buf, sizeof(buf));
 756
 757         close(fd);
 758
 759         /* bootdev definitions should only be one byte in size */
 760         if (rc != 1) {
 761                 pb_debug("powerpc: sysparam %s read returned %d\n",
 762                                 name, rc);
 763                 return -1;
 764         }
 765
 766         pb_debug("powerpc: sysparam %s: 0x%02x\n", name, buf[0]);
 767
 768         if (!ipmi_bootdev_is_valid(buf[0]))
 769                 return -1;
 770
 771         *val = buf[0];
 772         return 0;
 773 }
 774
 775 static int write_bootdev_sysparam(const char *name, uint8_t val)
 776 {
 777         char path[50];
 778         int fd, rc;
 779
 780         assert(strlen(sysparams_dir) + strlen(name) < sizeof(path));
 781         snprintf(path, sizeof(path), "%s%s", sysparams_dir, name);
 782
 783         fd = open(path, O_WRONLY);
 784         if (fd < 0) {
 785                 pb_debug("powerpc: can't access sysparam %s for writing\n",
 786                                 name);
 787                 return -1;
 788         }
 789
 790         for (;;) {
 791                 errno = 0;
 792                 rc = write(fd, &val, sizeof(val));
 793                 if (rc == sizeof(val)) {
 794                         rc = 0;
 795                         break;
 796                 }
 797
 798                 if (rc <= 0 && errno != EINTR) {
 799                         pb_log("powerpc: error updating sysparam %s: %s",
 800                                         name, strerror(errno));
 801                         rc = -1;
 802                         break;
 803                 }
 804         }
 805
 806         close(fd);
 807
 808         if (!rc)
 809                 pb_debug("powerpc: set sysparam %s: 0x%02x\n", name, val);
 810
 811         return rc;
 812 }
 813
 814 static int clear_ipmi_bootdev_sysparams(
 815                 struct platform_powerpc *platform __attribute__((unused)),
 816                 bool persistent)
 817 {
 818         if (persistent) {
 819                 /* invalidate default-boot-device setting */
 820                 write_bootdev_sysparam("default-boot-device", 0xff);
 821         } else {
 822                 /* invalidate next-boot-device setting */
 823                 write_bootdev_sysparam("next-boot-device", 0xff);
 824         }
 825         return 0;
 826 }
 827
 828 static int get_ipmi_bootdev_sysparams(
 829                 struct platform_powerpc *platform __attribute__((unused)),
 830                 uint8_t *bootdev, bool *persistent)
 831 {
 832         uint8_t next_bootdev, default_bootdev;
 833         bool next_valid, default_valid;
 834         int rc;
 835
 836         rc = read_bootdev_sysparam("next-boot-device", &next_bootdev);
 837         next_valid = rc == 0;
 838
 839         rc = read_bootdev_sysparam("default-boot-device", &default_bootdev);
 840         default_valid = rc == 0;
 841
 842         /* nothing valid? no need to change the config */
 843         if (!next_valid && !default_valid)
 844                 return -1;
 845
 846         *persistent = !next_valid;
 847         *bootdev = next_valid ? next_bootdev : default_bootdev;
 848         return 0;
 849 }
 850
 851 static int clear_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 852                                    bool persistent __attribute__((unused)))
 853 {
 854         uint16_t resp_len;
 855         uint8_t resp[1];
 856         uint8_t req[] = {
 857                 0x05, /* parameter selector: boot flags */
 858                 0x80, /* data 1: valid */
 859                 0x00, /* data 2: bootdev: no override */
 860                 0x00, /* data 3: system defaults */
 861                 0x00, /* data 4: no request for shared mode, mux defaults */
 862                 0x00, /* data 5: no instance request */
 863         };
 864
 865         resp_len = sizeof(resp);
 866
 867         ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 868                         IPMI_CMD_CHASSIS_SET_SYSTEM_BOOT_OPTIONS,
 869                         req, sizeof(req),
 870                         resp, &resp_len,
 871                         ipmi_timeout);
 872         return 0;
 873 }
 874
 875 static int get_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 876                 uint8_t *bootdev, bool *persistent)
 877 {
 878         uint16_t resp_len;
 879         uint8_t resp[8];
 880         int rc;
 881         uint8_t req[] = {
 882                 0x05, /* parameter selector: boot flags */
 883                 0x00, /* no set selector */
 884                 0x00, /* no block selector */
 885         };
 886
 887         resp_len = sizeof(resp);
 888         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 889                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
 890                         req, sizeof(req),
 891                         resp, &resp_len,
 892                         ipmi_timeout);
 893         if (rc) {
 894                 pb_log("platform: error reading IPMI boot options\n");
 895                 return -1;
 896         }
 897
 898         if (resp_len != sizeof(resp)) {
 899                 pb_log("platform: unexpected length (%d) in "
 900                                 "boot options response\n", resp_len);
 901                 return -1;
 902         }
 903
 904         pb_debug("IPMI get_bootdev response:\n");
 905         for (int i = 0; i < resp_len; i++)
 906                 pb_debug("%x ", resp[i]);
 907         pb_debug("\n");
 908
 909         if (resp[0] != 0) {
 910                 pb_log("platform: non-zero completion code %d from IPMI req\n",
 911                                 resp[0]);
 912                 return -1;
 913         }
 914
 915         /* check for correct parameter version */
 916         if ((resp[1] & 0xf) != 0x1) {
 917                 pb_log("platform: unexpected version (0x%x) in "
 918                                 "boot options response\n", resp[0]);
 919                 return -1;
 920         }
 921
 922         /* check for valid paramters */
 923         if (resp[2] & 0x80) {
 924                 pb_debug("platform: boot options are invalid/locked\n");
 925                 return -1;
 926         }
 927
 928         *persistent = false;
 929
 930         /* check for valid flags */
 931         if (!(resp[3] & 0x80)) {
 932                 pb_debug("platform: boot flags are invalid, ignoring\n");
 933                 return -1;
 934         }
 935
 936         *persistent = resp[3] & 0x40;
 937         *bootdev = (resp[4] >> 2) & 0x0f;
 938         return 0;
 939 }
 940
 941 static int set_ipmi_os_boot_sensor(struct platform_powerpc *platform)
 942 {
 943         int sensor_number;
 944         uint16_t resp_len;
 945         uint8_t resp[1];
 946         uint8_t req[] = {
 947                 0x00, /* sensor number: os boot */
 948                 0xA9, /* operation: set everything */
 949                 0x00, /* sensor reading: none */
 950                 0x40, /* assertion mask lsb: set state 6 */
 951                 0x00, /* assertion mask msb: none */
 952                 0x00, /* deassertion mask lsb: none */
 953                 0x00, /* deassertion mask msb: none */
 954                 0x00, /* event data 1: none */
 955                 0x00, /* event data 2: none */
 956                 0x00, /* event data 3: none */
 957         };
 958
 959         sensor_number = get_ipmi_sensor(platform, IPMI_SENSOR_ID_OS_BOOT);
 960         if (sensor_number < 0) {
 961                 pb_log("Couldn't find OS boot sensor in device tree\n");
 962                 return -1;
 963         }
 964
 965         req[0] = sensor_number;
 966
 967         resp_len = sizeof(resp);
 968
 969         ipmi_transaction(platform->ipmi, IPMI_NETFN_SE,
 970                         IPMI_CMD_SENSOR_SET,
 971                         req, sizeof(req),
 972                         resp, &resp_len,
 973                         ipmi_timeout); return 0;
 974
 975         return 0;
 976 }
 977
 978 static void get_ipmi_network_override(struct platform_powerpc *platform,
 979                         struct config *config)
 980 {
 981         uint16_t min_len = 12, resp_len = 53, version;
 982         const uint32_t magic_value = 0x21706221;
 983         uint8_t resp[resp_len];
 984         uint32_t cookie;
 985         bool persistent;
 986         int i, rc;
 987         uint8_t req[] = {
 988                 0x61, /* parameter selector: OEM section (network) */
 989                 0x00, /* no set selector */
 990                 0x00, /* no block selector */
 991         };
 992
 993         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 994                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
 995                         req, sizeof(req),
 996                         resp, &resp_len,
 997                         ipmi_timeout);
 998
 999         pb_debug("IPMI net override resp [%d][%d]:\n", rc, resp_len);
1000         if (resp_len > 0) {
1001                 for (i = 0; i < resp_len; i++) {
1002                         pb_debug(" %02x", resp[i]);
1003                         if (i && (i + 1) % 16 == 0 && i != resp_len - 1)
1004                                 pb_debug("\n");
1005                         else if (i && (i + 1) % 8 == 0)
1006                                 pb_debug(" ");
1007                 }
1008                 pb_debug("\n");
1009         }
1010
1011         if (rc) {
1012                 pb_debug("IPMI network config option unavailable\n");
1013                 return;
1014         }
1015
1016         if (resp_len < min_len) {
1017                 pb_debug("IPMI net response too small\n");
1018                 return;
1019         }
1020
1021         if (resp[0] != 0) {
1022                 pb_log("platform: non-zero completion code %d from IPMI network req\n",
1023                        resp[0]);
1024                 return;
1025         }
1026
1027         /* Check for correct parameter version */
1028         if ((resp[1] & 0xf) != 0x1) {
1029                 pb_log("platform: unexpected version (0x%x) in network override response\n",
1030                        resp[0]);
1031                 return;
1032         }
1033
1034         /* Check that the parameters are valid */
1035         if (resp[2] & 0x80) {
1036                 pb_debug("platform: network override is invalid/locked\n");
1037                 return;
1038         }
1039
1040         /* Check for valid parameters in the boot flags section */
1041         if (!(resp[3] & 0x80)) {
1042                 pb_debug("platform: network override valid flag not set\n");
1043                 return;
1044         }
1045         /* Read the persistent flag; if it is set we need to save this config */
1046         persistent = resp[3] & 0x40;
1047         if (persistent)
1048                 pb_debug("platform: network override is persistent\n");
1049
1050         /* Check 4-byte cookie value */
1051         i = 4;
1052         memcpy(&cookie, &resp[i], sizeof(cookie));
1053         cookie = __be32_to_cpu(cookie);
1054         if (cookie != magic_value) {
1055                 pb_log_fn("Incorrect cookie %x\n", cookie);
1056                 return;
1057         }
1058         i += sizeof(cookie);
1059
1060         /* Check 2-byte version number */
1061         memcpy(&version, &resp[i], sizeof(version));
1062         version = __be16_to_cpu(version);
1063         i += sizeof(version);
1064         if (version != 1) {
1065                 pb_debug("Unexpected version: %u\n", version);
1066                 return;
1067         }
1068
1069         /* Interpret the rest of the interface config */
1070         rc = parse_ipmi_interface_override(config, &resp[i], resp_len - i);
1071
1072         if (!rc && persistent) {
1073                 /* Write this new config to NVRAM */
1074                 update_network_config(platform, config);
1075                 rc = write_nvram(platform);
1076                 if (rc)
1077                         pb_log("platform: Failed to save persistent interface override\n");
1078         }
1079 }
1080
1081 static void get_active_consoles(struct config *config)
1082 {
1083         struct stat sbuf;
1084         char *fsp_prop = NULL;
1085
1086         config->n_consoles = 2;
1087         config->consoles = talloc_array(config, char *, config->n_consoles);
1088         if (!config->consoles)
1089                 goto err;
1090
1091         config->consoles[0] = talloc_asprintf(config->consoles,
1092                                         "/dev/hvc0 [IPMI / Serial]");
1093         config->consoles[1] = talloc_asprintf(config->consoles,
1094                                         "/dev/tty1 [VGA]");
1095
1096         fsp_prop = talloc_asprintf(config, "%sfsps", devtree_dir);
1097         if (stat(fsp_prop, &sbuf) == 0) {
1098                 /* FSP based machines also have a separate serial console */
1099                 config->consoles = talloc_realloc(config, config->consoles,
1100                                                 char *, config->n_consoles + 1);
1101                 if (!config->consoles)
1102                         goto err;
1103                 config->consoles[config->n_consoles++] = talloc_asprintf(
1104                                                 config->consoles,
1105                                                 "/dev/hvc1 [Serial]");
1106         }
1107
1108         return;
1109 err:
1110         config->n_consoles = 0;
1111         pb_log("Failed to allocate memory for consoles\n");
1112 }
1113
1114 static int load_config(struct platform *p, struct config *config)
1115 {
1116         struct platform_powerpc *platform = to_platform_powerpc(p);
1117         int rc;
1118
1119         rc = parse_nvram(platform);
1120         if (rc)
1121                 pb_log_fn("Failed to parse nvram\n");
1122
1123         populate_config(platform, config);
1124
1125         if (platform->get_ipmi_bootdev) {
1126                 bool bootdev_persistent;
1127                 uint8_t bootdev = IPMI_BOOTDEV_INVALID;
1128                 rc = platform->get_ipmi_bootdev(platform, &bootdev,
1129                                 &bootdev_persistent);
1130                 if (!rc && ipmi_bootdev_is_valid(bootdev)) {
1131                         set_ipmi_bootdev(config, bootdev, bootdev_persistent);
1132                 }
1133         }
1134
1135         if (platform->ipmi)
1136                 get_ipmi_network_override(platform, config);
1137
1138         get_active_consoles(config);
1139
1140         return 0;
1141 }
1142
1143 static int save_config(struct platform *p, struct config *config)
1144 {
1145         struct platform_powerpc *platform = to_platform_powerpc(p);
1146         struct config *defaults;
1147
1148         if (config->ipmi_bootdev == IPMI_BOOTDEV_INVALID &&
1149             platform->clear_ipmi_bootdev) {
1150                 platform->clear_ipmi_bootdev(platform,
1151                                 config->ipmi_bootdev_persistent);
1152                 config->ipmi_bootdev = IPMI_BOOTDEV_NONE;
1153                 config->ipmi_bootdev_persistent = false;
1154         }
1155
1156         defaults = talloc_zero(platform, struct config);
1157         config_set_defaults(defaults);
1158
1159         update_config(platform, config, defaults);
1160
1161         talloc_free(defaults);
1162         return write_nvram(platform);
1163 }
1164
1165 static void pre_boot(struct platform *p, const struct config *config)
1166 {
1167         struct platform_powerpc *platform = to_platform_powerpc(p);
1168
1169         if (!config->ipmi_bootdev_persistent && platform->clear_ipmi_bootdev)
1170                 platform->clear_ipmi_bootdev(platform, false);
1171
1172         if (platform->set_os_boot_sensor)
1173                 platform->set_os_boot_sensor(platform);
1174 }
1175
1176 static int get_sysinfo(struct platform *p, struct system_info *sysinfo)
1177 {
1178         struct platform_powerpc *platform = p->platform_data;
1179         char *buf, *filename;
1180         int len, rc;
1181
1182         filename = talloc_asprintf(platform, "%smodel", devtree_dir);
1183         rc = read_file(platform, filename, &buf, &len);
1184         if (rc == 0)
1185                 sysinfo->type = talloc_steal(sysinfo, buf);
1186         talloc_free(filename);
1187
1188         filename = talloc_asprintf(platform, "%ssystem-id", devtree_dir);
1189         rc = read_file(platform, filename, &buf, &len);
1190         if (rc == 0)
1191                 sysinfo->identifier = talloc_steal(sysinfo, buf);
1192         talloc_free(filename);
1193
1194         sysinfo->bmc_mac = talloc_zero_size(sysinfo, HWADDR_SIZE);
1195
1196         if (platform->ipmi) {
1197                 ipmi_get_bmc_mac(platform->ipmi, sysinfo->bmc_mac);
1198                 ipmi_get_bmc_versions(platform->ipmi, sysinfo);
1199         }
1200
1201         if (platform->get_platform_versions)
1202                 platform->get_platform_versions(sysinfo);
1203
1204         return 0;
1205 }
1206
1207 static bool probe(struct platform *p, void *ctx)
1208 {
1209         struct platform_powerpc *platform;
1210         struct stat statbuf;
1211         bool bmc_present;
1212         int rc;
1213
1214         /* we need a device tree */
1215         rc = stat("/proc/device-tree", &statbuf);
1216         if (rc)
1217                 return false;
1218
1219         if (!S_ISDIR(statbuf.st_mode))
1220                 return false;
1221
1222         platform = talloc_zero(ctx, struct platform_powerpc);
1223         list_init(&platform->params);
1224
1225         p->platform_data = platform;
1226
1227         bmc_present = stat("/proc/device-tree/bmc", &statbuf) == 0;
1228
1229         if (ipmi_present() && bmc_present) {
1230                 pb_debug("platform: using direct IPMI for IPMI paramters\n");
1231                 platform->ipmi = ipmi_open(platform);
1232                 platform->get_ipmi_bootdev = get_ipmi_bootdev_ipmi;
1233                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_ipmi;
1234                 platform->set_os_boot_sensor = set_ipmi_os_boot_sensor;
1235         } else if (!stat(sysparams_dir, &statbuf)) {
1236                 pb_debug("platform: using sysparams for IPMI paramters\n");
1237                 platform->get_ipmi_bootdev = get_ipmi_bootdev_sysparams;
1238                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_sysparams;
1239
1240         } else {
1241                 pb_log("platform: no IPMI parameter support\n");
1242         }
1243
1244         if (bmc_present)
1245                 platform->get_platform_versions = hostboot_load_versions;
1246
1247         return true;
1248 }
1249
1250
1251 static struct platform platform_powerpc = {
1252         .name                   = "powerpc",
1253         .dhcp_arch_id           = 0x000e,
1254         .probe                  = probe,
1255         .load_config            = load_config,
1256         .save_config            = save_config,
1257         .pre_boot               = pre_boot,
1258         .get_sysinfo            = get_sysinfo,
1259 };
1260
1261 register_platform(platform_powerpc);