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         int             (*set_os_boot_sensor)(
  44                                 struct platform_powerpc *platform);
  45 };
  46
  47 static const char *known_params[] = {
  48         "auto-boot?",
  49         "petitboot,network",
  50         "petitboot,timeout",
  51         "petitboot,bootdev",
  52         "petitboot,language",
  53         "petitboot,debug?",
  54         NULL,
  55 };
  56
  57 #define to_platform_powerpc(p) \
  58         (struct platform_powerpc *)(p->platform_data)
  59
  60 /* a partition max a max size of 64k * 16bytes = 1M */
  61 static const int max_partition_size = 64 * 1024 * 16;
  62
  63 static bool param_is_known(const char *param, unsigned int len)
  64 {
  65         const char *known_param;
  66         unsigned int i;
  67
  68         for (i = 0; known_params[i]; i++) {
  69                 known_param = known_params[i];
  70                 if (len == strlen(known_param) &&
  71                                 !strncmp(param, known_param, len))
  72                         return true;
  73         }
  74
  75         return false;
  76 }
  77
  78 static int parse_nvram_params(struct platform_powerpc *platform,
  79                 char *buf, int len)
  80 {
  81         char *pos, *name, *value;
  82         unsigned int paramlen;
  83         int i, count;
  84
  85         /* discard 2 header lines:
  86          * "common" partiton"
  87          * ------------------
  88          */
  89         pos = buf;
  90         count = 0;
  91
  92         for (i = 0; i < len; i++) {
  93                 if (pos[i] == '\n')
  94                         count++;
  95                 if (count == 2)
  96                         break;
  97         }
  98
  99         if (i == len) {
 100                 fprintf(stderr, "failure parsing nvram output\n");
 101                 return -1;
 102         }
 103
 104         for (pos = buf + i; pos < buf + len; pos += paramlen + 1) {
 105                 unsigned int namelen;
 106                 struct param *param;
 107                 char *newline;
 108
 109                 newline = strchr(pos, '\n');
 110                 if (!newline)
 111                         break;
 112
 113                 *newline = '\0';
 114
 115                 paramlen = strlen(pos);
 116
 117                 name = pos;
 118                 value = strchr(pos, '=');
 119                 if (!value)
 120                         continue;
 121
 122                 namelen = value - name;
 123                 if (namelen == 0)
 124                         continue;
 125
 126                 if (!param_is_known(name, namelen))
 127                         continue;
 128
 129                 value++;
 130
 131                 param = talloc(platform, struct param);
 132                 param->modified = false;
 133                 param->name = talloc_strndup(platform, name, namelen);
 134                 param->value = talloc_strdup(platform, value);
 135                 list_add(&platform->params, &param->list);
 136         }
 137
 138         return 0;
 139 }
 140
 141 static int parse_nvram(struct platform_powerpc *platform)
 142 {
 143         struct process *process;
 144         const char *argv[5];
 145         int rc;
 146
 147         argv[0] = "nvram";
 148         argv[1] = "--print-config";
 149         argv[2] = "--partition";
 150         argv[3] = partition;
 151         argv[4] = NULL;
 152
 153         process = process_create(platform);
 154         process->path = "nvram";
 155         process->argv = argv;
 156         process->keep_stdout = true;
 157
 158         rc = process_run_sync(process);
 159
 160         if (rc || !process_exit_ok(process)) {
 161                 fprintf(stderr, "nvram process returned "
 162                                 "non-zero exit status\n");
 163                 rc = -1;
 164         } else {
 165                 rc = parse_nvram_params(platform, process->stdout_buf,
 166                                             process->stdout_len);
 167         }
 168
 169         process_release(process);
 170         return rc;
 171 }
 172
 173 static int write_nvram(struct platform_powerpc *platform)
 174 {
 175         struct process *process;
 176         struct param *param;
 177         const char *argv[6];
 178         int rc;
 179
 180         argv[0] = "nvram";
 181         argv[1] = "--update-config";
 182         argv[2] = NULL;
 183         argv[3] = "--partition";
 184         argv[4] = partition;
 185         argv[5] = NULL;
 186
 187         process = process_create(platform);
 188         process->path = "nvram";
 189         process->argv = argv;
 190
 191         list_for_each_entry(&platform->params, param, list) {
 192                 char *paramstr;
 193
 194                 if (!param->modified)
 195                         continue;
 196
 197                 paramstr = talloc_asprintf(platform, "%s=%s",
 198                                 param->name, param->value);
 199                 argv[2] = paramstr;
 200
 201                 rc = process_run_sync(process);
 202
 203                 talloc_free(paramstr);
 204
 205                 if (rc || !process_exit_ok(process)) {
 206                         rc = -1;
 207                         pb_log("nvram update process returned "
 208                                         "non-zero exit status\n");
 209                         break;
 210                 }
 211         }
 212
 213         process_release(process);
 214         return rc;
 215 }
 216
 217 static const char *get_param(struct platform_powerpc *platform,
 218                 const char *name)
 219 {
 220         struct param *param;
 221
 222         list_for_each_entry(&platform->params, param, list)
 223                 if (!strcmp(param->name, name))
 224                         return param->value;
 225         return NULL;
 226 }
 227
 228 static void set_param(struct platform_powerpc *platform, const char *name,
 229                 const char *value)
 230 {
 231         struct param *param;
 232
 233         list_for_each_entry(&platform->params, param, list) {
 234                 if (strcmp(param->name, name))
 235                         continue;
 236
 237                 if (!strcmp(param->value, value))
 238                         return;
 239
 240                 talloc_free(param->value);
 241                 param->value = talloc_strdup(param, value);
 242                 param->modified = true;
 243                 return;
 244         }
 245
 246
 247         param = talloc(platform, struct param);
 248         param->modified = true;
 249         param->name = talloc_strdup(platform, name);
 250         param->value = talloc_strdup(platform, value);
 251         list_add(&platform->params, &param->list);
 252 }
 253
 254 static int parse_hwaddr(struct interface_config *ifconf, char *str)
 255 {
 256         int i;
 257
 258         if (strlen(str) != strlen("00:00:00:00:00:00"))
 259                 return -1;
 260
 261         for (i = 0; i < HWADDR_SIZE; i++) {
 262                 char byte[3], *endp;
 263                 unsigned long x;
 264
 265                 byte[0] = str[i * 3 + 0];
 266                 byte[1] = str[i * 3 + 1];
 267                 byte[2] = '\0';
 268
 269                 x = strtoul(byte, &endp, 16);
 270                 if (endp != byte + 2)
 271                         return -1;
 272
 273                 ifconf->hwaddr[i] = x & 0xff;
 274         }
 275
 276         return 0;
 277 }
 278
 279 static int parse_one_interface_config(struct config *config,
 280                 char *confstr)
 281 {
 282         struct interface_config *ifconf;
 283         char *tok, *saveptr;
 284
 285         ifconf = talloc_zero(config, struct interface_config);
 286
 287         if (!confstr || !strlen(confstr))
 288                 goto out_err;
 289
 290         /* first token should be the mac address */
 291         tok = strtok_r(confstr, ",", &saveptr);
 292         if (!tok)
 293                 goto out_err;
 294
 295         if (parse_hwaddr(ifconf, tok))
 296                 goto out_err;
 297
 298         /* second token is the method */
 299         tok = strtok_r(NULL, ",", &saveptr);
 300         if (!tok || !strlen(tok) || !strcmp(tok, "ignore")) {
 301                 ifconf->ignore = true;
 302
 303         } else if (!strcmp(tok, "dhcp")) {
 304                 ifconf->method = CONFIG_METHOD_DHCP;
 305
 306         } else if (!strcmp(tok, "static")) {
 307                 ifconf->method = CONFIG_METHOD_STATIC;
 308
 309                 /* ip/mask, [optional] gateway */
 310                 tok = strtok_r(NULL, ",", &saveptr);
 311                 if (!tok)
 312                         goto out_err;
 313                 ifconf->static_config.address =
 314                         talloc_strdup(ifconf, tok);
 315
 316                 tok = strtok_r(NULL, ",", &saveptr);
 317                 if (tok) {
 318                         ifconf->static_config.gateway =
 319                                 talloc_strdup(ifconf, tok);
 320                 }
 321
 322         } else {
 323                 pb_log("Unknown network configuration method %s\n", tok);
 324                 goto out_err;
 325         }
 326
 327         config->network.interfaces = talloc_realloc(config,
 328                         config->network.interfaces,
 329                         struct interface_config *,
 330                         ++config->network.n_interfaces);
 331
 332         config->network.interfaces[config->network.n_interfaces - 1] = ifconf;
 333
 334         return 0;
 335 out_err:
 336         talloc_free(ifconf);
 337         return -1;
 338 }
 339
 340 static int parse_one_dns_config(struct config *config,
 341                 char *confstr)
 342 {
 343         char *tok, *saveptr = NULL;
 344
 345         for (tok = strtok_r(confstr, ",", &saveptr); tok;
 346                         tok = strtok_r(NULL, ",", &saveptr)) {
 347
 348                 char *server = talloc_strdup(config, tok);
 349
 350                 config->network.dns_servers = talloc_realloc(config,
 351                                 config->network.dns_servers, const char *,
 352                                 ++config->network.n_dns_servers);
 353
 354                 config->network.dns_servers[config->network.n_dns_servers - 1]
 355                                 = server;
 356         }
 357
 358         return 0;
 359 }
 360
 361 static void populate_network_config(struct platform_powerpc *platform,
 362                 struct config *config)
 363 {
 364         char *val, *saveptr = NULL;
 365         const char *cval;
 366         int i;
 367
 368         cval = get_param(platform, "petitboot,network");
 369         if (!cval || !strlen(cval))
 370                 return;
 371
 372         val = talloc_strdup(config, cval);
 373
 374         for (i = 0; ; i++) {
 375                 char *tok;
 376
 377                 tok = strtok_r(i == 0 ? val : NULL, " ", &saveptr);
 378                 if (!tok)
 379                         break;
 380
 381                 if (!strncasecmp(tok, "dns,", strlen("dns,")))
 382                         parse_one_dns_config(config, tok + strlen("dns,"));
 383                 else
 384                         parse_one_interface_config(config, tok);
 385
 386         }
 387
 388         talloc_free(val);
 389 }
 390
 391 static void populate_bootdev_config(struct platform_powerpc *platform,
 392                 struct config *config)
 393
 394 {
 395         const char *val;
 396
 397         config->boot_device = NULL;
 398
 399         val = get_param(platform, "petitboot,bootdev");
 400         if (!val || !strlen(val))
 401                 return;
 402
 403         if (!strncmp(val, "uuid:", strlen("uuid:"))) {
 404                 config->boot_device = talloc_strdup(config,
 405                                                 val + strlen("uuid:"));
 406
 407         } else if (!strncmp(val, "mac:", strlen("mac:"))) {
 408                 config->boot_device = talloc_strdup(config,
 409                                                 val + strlen("mac:"));
 410
 411         } else {
 412                 pb_log("bootdev config is in an unknown format "
 413                                 "(expected uuid:... or mac:...)");
 414         }
 415 }
 416
 417 static void populate_config(struct platform_powerpc *platform,
 418                 struct config *config)
 419 {
 420         const char *val;
 421         char *end;
 422         unsigned long timeout;
 423
 424         /* if the "auto-boot?' property is present and "false", disable auto
 425          * boot */
 426         val = get_param(platform, "auto-boot?");
 427         config->autoboot_enabled = !val || strcmp(val, "false");
 428
 429         val = get_param(platform, "petitboot,timeout");
 430         if (val) {
 431                 timeout = strtoul(val, &end, 10);
 432                 if (end != val) {
 433                         if (timeout >= INT_MAX)
 434                                 timeout = INT_MAX;
 435                         config->autoboot_timeout_sec = (int)timeout;
 436                 }
 437         }
 438
 439         val = get_param(platform, "petitboot,language");
 440         config->lang = val ? talloc_strdup(config, val) : NULL;
 441
 442         populate_network_config(platform, config);
 443
 444         populate_bootdev_config(platform, config);
 445
 446         if (!config->debug) {
 447                 val = get_param(platform, "petitboot,debug?");
 448                 config->debug = val && !strcmp(val, "true");
 449         }
 450 }
 451
 452 static char *iface_config_str(void *ctx, struct interface_config *config)
 453 {
 454         char *str;
 455
 456         /* todo: HWADDR size is hardcoded as 6, but we may need to handle
 457          * different hardware address formats */
 458         str = talloc_asprintf(ctx, "%02x:%02x:%02x:%02x:%02x:%02x,",
 459                         config->hwaddr[0], config->hwaddr[1],
 460                         config->hwaddr[2], config->hwaddr[3],
 461                         config->hwaddr[4], config->hwaddr[5]);
 462
 463         if (config->ignore) {
 464                 str = talloc_asprintf_append(str, "ignore");
 465
 466         } else if (config->method == CONFIG_METHOD_DHCP) {
 467                 str = talloc_asprintf_append(str, "dhcp");
 468
 469         } else if (config->method == CONFIG_METHOD_STATIC) {
 470                 str = talloc_asprintf_append(str, "static,%s%s%s",
 471                                 config->static_config.address,
 472                                 config->static_config.gateway ? "," : "",
 473                                 config->static_config.gateway ?: "");
 474         }
 475         return str;
 476 }
 477
 478 static char *dns_config_str(void *ctx, const char **dns_servers, int n)
 479 {
 480         char *str;
 481         int i;
 482
 483         str = talloc_strdup(ctx, "dns,");
 484         for (i = 0; i < n; i++) {
 485                 str = talloc_asprintf_append(str, "%s%s",
 486                                 i == 0 ? "" : ",",
 487                                 dns_servers[i]);
 488         }
 489
 490         return str;
 491 }
 492
 493 static void update_string_config(struct platform_powerpc *platform,
 494                 const char *name, const char *value)
 495 {
 496         const char *cur;
 497
 498         cur = get_param(platform, name);
 499
 500         /* don't set an empty parameter if it doesn't already exist */
 501         if (!cur && !strlen(value))
 502                 return;
 503
 504         set_param(platform, name, value);
 505 }
 506
 507 static void update_network_config(struct platform_powerpc *platform,
 508         struct config *config)
 509 {
 510         unsigned int i;
 511         char *val;
 512
 513         val = talloc_strdup(platform, "");
 514
 515         for (i = 0; i < config->network.n_interfaces; i++) {
 516                 char *iface_str = iface_config_str(platform,
 517                                         config->network.interfaces[i]);
 518                 val = talloc_asprintf_append(val, "%s%s",
 519                                 *val == '\0' ? "" : " ", iface_str);
 520                 talloc_free(iface_str);
 521         }
 522
 523         if (config->network.n_dns_servers) {
 524                 char *dns_str = dns_config_str(platform,
 525                                                 config->network.dns_servers,
 526                                                 config->network.n_dns_servers);
 527                 val = talloc_asprintf_append(val, "%s%s",
 528                                 *val == '\0' ? "" : " ", dns_str);
 529                 talloc_free(dns_str);
 530         }
 531
 532         update_string_config(platform, "petitboot,network", val);
 533
 534         talloc_free(val);
 535 }
 536
 537 static void update_bootdev_config(struct platform_powerpc *platform,
 538                 struct config *config)
 539 {
 540         char *val, *tmp = NULL;
 541
 542         if (!config->boot_device)
 543                 val = "";
 544         else
 545                 tmp = val = talloc_asprintf(platform,
 546                                 "uuid:%s", config->boot_device);
 547
 548         update_string_config(platform, "petitboot,bootdev", val);
 549         talloc_free(tmp);
 550 }
 551
 552 static int update_config(struct platform_powerpc *platform,
 553                 struct config *config, struct config *defaults)
 554 {
 555         char *tmp = NULL;
 556         const char *val;
 557
 558         if (config->autoboot_enabled == defaults->autoboot_enabled)
 559                 val = "";
 560         else
 561                 val = config->autoboot_enabled ? "true" : "false";
 562         update_string_config(platform, "auto-boot?", val);
 563
 564         if (config->autoboot_timeout_sec == defaults->autoboot_timeout_sec)
 565                 val = "";
 566         else
 567                 val = tmp = talloc_asprintf(platform, "%d",
 568                                 config->autoboot_timeout_sec);
 569
 570         update_string_config(platform, "petitboot,timeout", val);
 571         if (tmp)
 572                 talloc_free(tmp);
 573
 574         val = config->lang ?: "";
 575         update_string_config(platform, "petitboot,language", val);
 576
 577         update_network_config(platform, config);
 578
 579         update_bootdev_config(platform, config);
 580
 581         return write_nvram(platform);
 582 }
 583
 584 static void set_ipmi_bootdev(struct config *config, enum ipmi_bootdev bootdev,
 585                 bool persistent)
 586 {
 587         config->ipmi_bootdev = bootdev;
 588         config->ipmi_bootdev_persistent = persistent;
 589
 590         switch (bootdev) {
 591         case IPMI_BOOTDEV_NONE:
 592         case IPMI_BOOTDEV_DISK:
 593         case IPMI_BOOTDEV_NETWORK:
 594         case IPMI_BOOTDEV_CDROM:
 595                 break;
 596         case IPMI_BOOTDEV_SETUP:
 597                 config->autoboot_enabled = false;
 598                 break;
 599         case IPMI_BOOTDEV_SAFE:
 600                 config->autoboot_enabled = false;
 601                 config->safe_mode = true;
 602                 break;
 603         }
 604 }
 605
 606 static int read_bootdev_sysparam(const char *name, uint8_t *val)
 607 {
 608         uint8_t buf[2];
 609         char path[50];
 610         int fd, rc;
 611
 612         strcpy(path, sysparams_dir);
 613         assert(strlen(name) < sizeof(path) - strlen(path));
 614         strcat(path, name);
 615
 616         fd = open(path, O_RDONLY);
 617         if (fd < 0) {
 618                 pb_debug("powerpc: can't access sysparam %s\n",
 619                                 name);
 620                 return -1;
 621         }
 622
 623         rc = read(fd, buf, sizeof(buf));
 624
 625         close(fd);
 626
 627         /* bootdev definitions should only be one byte in size */
 628         if (rc != 1) {
 629                 pb_debug("powerpc: sysparam %s read returned %d\n",
 630                                 name, rc);
 631                 return -1;
 632         }
 633
 634         pb_debug("powerpc: sysparam %s: 0x%02x\n", name, buf[0]);
 635
 636         if (!ipmi_bootdev_is_valid(buf[0]))
 637                 return -1;
 638
 639         *val = buf[0];
 640         return 0;
 641 }
 642
 643 static int write_bootdev_sysparam(const char *name, uint8_t val)
 644 {
 645         char path[50];
 646         int fd, rc;
 647
 648         strcpy(path, sysparams_dir);
 649         assert(strlen(name) < sizeof(path) - strlen(path));
 650         strcat(path, name);
 651
 652         fd = open(path, O_WRONLY);
 653         if (fd < 0) {
 654                 pb_debug("powerpc: can't access sysparam %s for writing\n",
 655                                 name);
 656                 return -1;
 657         }
 658
 659         for (;;) {
 660                 errno = 0;
 661                 rc = write(fd, &val, sizeof(val));
 662                 if (rc == sizeof(val)) {
 663                         rc = 0;
 664                         break;
 665                 }
 666
 667                 if (rc <= 0 && errno != EINTR) {
 668                         pb_log("powerpc: error updating sysparam %s: %s",
 669                                         name, strerror(errno));
 670                         rc = -1;
 671                         break;
 672                 }
 673         }
 674
 675         close(fd);
 676
 677         if (!rc)
 678                 pb_debug("powerpc: set sysparam %s: 0x%02x\n", name, val);
 679
 680         return rc;
 681 }
 682
 683 static int clear_ipmi_bootdev_sysparams(
 684                 struct platform_powerpc *platform __attribute__((unused)))
 685 {
 686         /* invalidate next-boot-device setting */
 687         write_bootdev_sysparam("next-boot-device", 0xff);
 688         return 0;
 689 }
 690
 691 static int get_ipmi_bootdev_sysparams(
 692                 struct platform_powerpc *platform __attribute__((unused)),
 693                 uint8_t *bootdev, bool *persistent)
 694 {
 695         uint8_t next_bootdev, default_bootdev;
 696         bool next_valid, default_valid;
 697         int rc;
 698
 699         rc = read_bootdev_sysparam("next-boot-device", &next_bootdev);
 700         next_valid = rc == 0;
 701
 702         rc = read_bootdev_sysparam("default-boot-device", &default_bootdev);
 703         default_valid = rc == 0;
 704
 705         /* nothing valid? no need to change the config */
 706         if (!next_valid && !default_valid)
 707                 return -1;
 708
 709         *persistent = !next_valid;
 710         *bootdev = next_valid ? next_bootdev : default_bootdev;
 711         return 0;
 712 }
 713
 714 static int clear_ipmi_bootdev_ipmi(struct platform_powerpc *platform)
 715 {
 716         uint16_t resp_len;
 717         uint8_t resp[1];
 718         uint8_t req[] = {
 719                 0x05, /* parameter selector: boot flags */
 720                 0x80, /* data 1: valid */
 721                 0x00, /* data 2: bootdev: no override */
 722                 0x00, /* data 3: system defaults */
 723                 0x00, /* data 4: no request for shared mode, mux defaults */
 724                 0x00, /* data 5: no instance request */
 725         };
 726
 727         resp_len = sizeof(resp);
 728
 729         ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 730                         IPMI_CMD_CHASSIS_SET_SYSTEM_BOOT_OPTIONS,
 731                         req, sizeof(req),
 732                         resp, &resp_len,
 733                         ipmi_timeout);
 734         return 0;
 735 }
 736
 737 static int get_ipmi_bootdev_ipmi(struct platform_powerpc *platform,
 738                 uint8_t *bootdev, bool *persistent)
 739 {
 740         uint16_t resp_len;
 741         uint8_t resp[8];
 742         int rc;
 743         uint8_t req[] = {
 744                 0x05, /* parameter selector: boot flags */
 745                 0x00, /* no set selector */
 746                 0x00, /* no block selector */
 747         };
 748
 749         resp_len = sizeof(resp);
 750         rc = ipmi_transaction(platform->ipmi, IPMI_NETFN_CHASSIS,
 751                         IPMI_CMD_CHASSIS_GET_SYSTEM_BOOT_OPTIONS,
 752                         req, sizeof(req),
 753                         resp, &resp_len,
 754                         ipmi_timeout);
 755         if (rc) {
 756                 pb_log("platform: error reading IPMI boot options\n");
 757                 return -1;
 758         }
 759
 760         if (resp_len != sizeof(resp)) {
 761                 pb_log("platform: unexpected length (%d) in "
 762                                 "boot options response\n", resp_len);
 763                 return -1;
 764         }
 765
 766         if (resp[0] != 0) {
 767                 pb_log("platform: non-zero completion code %d from IPMI req\n",
 768                                 resp[0]);
 769                 return -1;
 770         }
 771
 772         /* check for correct parameter version */
 773         if ((resp[1] & 0xf) != 0x1) {
 774                 pb_log("platform: unexpected version (0x%x) in "
 775                                 "boot options response\n", resp[0]);
 776                 return -1;
 777         }
 778
 779         /* check for valid paramters */
 780         if (resp[2] & 0x80) {
 781                 pb_debug("platform: boot options are invalid/locked\n");
 782                 return -1;
 783         }
 784
 785         *persistent = false;
 786
 787         /* check for valid flags */
 788         if (!(resp[3] & 0x80)) {
 789                 pb_debug("platform: boot flags are invalid, ignoring\n");
 790                 return 0;
 791         }
 792
 793         *persistent = resp[3] & 0x40;
 794         *bootdev = (resp[4] >> 2) & 0x0f;
 795         return 0;
 796 }
 797
 798 static int set_ipmi_os_boot_sensor(struct platform_powerpc *platform)
 799 {
 800         int sensor_number;
 801         uint16_t resp_len;
 802         uint8_t resp[1];
 803         uint8_t req[] = {
 804                 0x00, /* sensor number: os boot */
 805                 0x10, /* operation: set assertion bits */
 806                 0x00, /* sensor reading: none */
 807                 0x40, /* assertion mask lsb: set state 6 */
 808                 0x00, /* assertion mask msb: none */
 809                 0x00, /* deassertion mask lsb: none */
 810                 0x00, /* deassertion mask msb: none */
 811                 0x00, /* event data 1: none */
 812                 0x00, /* event data 2: none */
 813                 0x00, /* event data 3: none */
 814         };
 815
 816         sensor_number = get_ipmi_sensor(platform, IPMI_SENSOR_ID_OS_BOOT);
 817         if (sensor_number < 0) {
 818                 pb_log("Couldn't find OS boot sensor in device tree\n");
 819                 return -1;
 820         }
 821
 822         req[0] = sensor_number;
 823
 824         resp_len = sizeof(resp);
 825
 826         ipmi_transaction(platform->ipmi, IPMI_NETFN_SE,
 827                         IPMI_CMD_SENSOR_SET,
 828                         req, sizeof(req),
 829                         resp, &resp_len,
 830                         ipmi_timeout); return 0;
 831
 832         return 0;
 833 }
 834
 835 static int load_config(struct platform *p, struct config *config)
 836 {
 837         struct platform_powerpc *platform = to_platform_powerpc(p);
 838         int rc;
 839
 840         rc = parse_nvram(platform);
 841         if (rc)
 842                 return rc;
 843
 844         populate_config(platform, config);
 845
 846         if (platform->get_ipmi_bootdev) {
 847                 bool bootdev_persistent;
 848                 uint8_t bootdev;
 849                 rc = platform->get_ipmi_bootdev(platform, &bootdev,
 850                                 &bootdev_persistent);
 851                 if (!rc && ipmi_bootdev_is_valid(bootdev)) {
 852                         set_ipmi_bootdev(config, bootdev, bootdev_persistent);
 853                 }
 854         }
 855
 856         return 0;
 857 }
 858
 859 static int save_config(struct platform *p, struct config *config)
 860 {
 861         struct platform_powerpc *platform = to_platform_powerpc(p);
 862         struct config *defaults;
 863         int rc;
 864
 865         defaults = talloc_zero(platform, struct config);
 866         config_set_defaults(defaults);
 867
 868         rc = update_config(platform, config, defaults);
 869
 870         talloc_free(defaults);
 871         return rc;
 872 }
 873
 874 static void pre_boot(struct platform *p, const struct config *config)
 875 {
 876         struct platform_powerpc *platform = to_platform_powerpc(p);
 877
 878         if (!config->ipmi_bootdev_persistent && platform->clear_ipmi_bootdev)
 879                 platform->clear_ipmi_bootdev(platform);
 880
 881         if (platform->set_os_boot_sensor)
 882                 platform->set_os_boot_sensor(platform);
 883 }
 884
 885 static int get_sysinfo(struct platform *p, struct system_info *sysinfo)
 886 {
 887         struct platform_powerpc *platform = p->platform_data;
 888         char *buf, *filename;
 889         int len, rc;
 890
 891         filename = talloc_asprintf(platform, "%smodel", devtree_dir);
 892         rc = read_file(platform, filename, &buf, &len);
 893         if (rc == 0)
 894                 sysinfo->type = talloc_steal(sysinfo, buf);
 895         talloc_free(filename);
 896
 897         filename = talloc_asprintf(platform, "%ssystem-id", devtree_dir);
 898         rc = read_file(platform, filename, &buf, &len);
 899         if (rc == 0)
 900                 sysinfo->identifier = talloc_steal(sysinfo, buf);
 901         talloc_free(filename);
 902
 903         return 0;
 904 }
 905
 906 static bool probe(struct platform *p, void *ctx)
 907 {
 908         struct platform_powerpc *platform;
 909         struct stat statbuf;
 910         int rc;
 911
 912         /* we need a device tree */
 913         rc = stat("/proc/device-tree", &statbuf);
 914         if (rc)
 915                 return false;
 916
 917         if (!S_ISDIR(statbuf.st_mode))
 918                 return false;
 919
 920         platform = talloc_zero(ctx, struct platform_powerpc);
 921         list_init(&platform->params);
 922
 923         p->platform_data = platform;
 924
 925         if (ipmi_present()) {
 926                 pb_debug("platform: using direct IPMI for IPMI paramters\n");
 927                 platform->ipmi = ipmi_open(platform);
 928                 platform->get_ipmi_bootdev = get_ipmi_bootdev_ipmi;
 929                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_ipmi;
 930                 platform->set_os_boot_sensor = set_ipmi_os_boot_sensor;
 931
 932         } else if (!stat(sysparams_dir, &statbuf)) {
 933                 pb_debug("platform: using sysparams for IPMI paramters\n");
 934                 platform->get_ipmi_bootdev = get_ipmi_bootdev_sysparams;
 935                 platform->clear_ipmi_bootdev = clear_ipmi_bootdev_sysparams;
 936
 937         } else {
 938                 pb_log("platform: no IPMI parameter support\n");
 939         }
 940
 941         return true;
 942 }
 943
 944
 945 static struct platform platform_powerpc = {
 946         .name                   = "powerpc",
 947         .dhcp_arch_id           = 0x000e,
 948         .probe                  = probe,
 949         .load_config            = load_config,
 950         .save_config            = save_config,
 951         .pre_boot               = pre_boot,
 952         .get_sysinfo            = get_sysinfo,
 953 };
 954
 955 register_platform(platform_powerpc);