git.ozlabs.org Git - petitboot/blob - discover/platform-arm64.c

   1 /*
   2  *  This program is free software; you can redistribute it and/or modify
   3  *  it under the terms of the GNU General Public License as published by
   4  *  the Free Software Foundation; version 2 of the License.
   5  *
   6  *  This program is distributed in the hope that it will be useful,
   7  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  *  GNU General Public License for more details.
  10  *
  11  *  You should have received a copy of the GNU General Public License
  12  *  along with this program; if not, write to the Free Software
  13  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  14  *
  15  *  Copyright (C) 2018 Huaxintong Semiconductor Technology Co.,Ltd. All rights
  16  *  reserved.
  17  *  Author: Ge Song <ge.song@hxt-semitech.com>
  18  */
  19
  20 #include <ctype.h>
  21 #include <errno.h>
  22 #include <limits.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <sys/statfs.h>
  26
  27 #include "efi/efivar.h"
  28 #include "file/file.h"
  29 #include "log/log.h"
  30 #include <process/process.h>
  31 #include <system/system.h>
  32 #include "talloc/talloc.h"
  33 #include "types/types.h"
  34
  35
  36 #include "ipmi.h"
  37 #include "platform.h"
  38
  39 static const char *efi_vars_guid = "fb78ab4b-bd43-41a0-99a2-4e74bef9169b";
  40
  41 struct platform_arm64 {
  42         struct param_list *params;
  43         struct ipmi *ipmi;
  44 };
  45
  46 static inline struct platform_arm64 *to_platform_arm64(struct platform *p)
  47 {
  48         return (struct platform_arm64 *)(p->platform_data);
  49 }
  50
  51 static void parse_nvram(struct param_list *pl)
  52 {
  53         const char** known;
  54
  55         param_list_for_each_known_param(pl, known) {
  56                 struct efi_data *efi_data;
  57
  58                 if (efi_get_variable(NULL, efi_vars_guid, *known, &efi_data))
  59                         continue;
  60
  61                 param_list_set(pl, *known, efi_data->data,
  62                         true);
  63
  64                 talloc_free(efi_data);
  65         }
  66 }
  67
  68 static void write_nvram(const struct param_list *pl)
  69 {
  70         struct efi_data efi_data;
  71         struct param *param;
  72
  73         efi_data.attributes =
  74                 EFI_VARIABLE_NON_VOLATILE |
  75                 EFI_VARIABLE_RUNTIME_ACCESS |
  76                 EFI_VARIABLE_BOOTSERVICE_ACCESS;
  77
  78         param_list_for_each(pl, param) {
  79                 if (!param->modified)
  80                         continue;
  81
  82                 efi_data.data = param->value;
  83                 efi_data.data_size = strlen(param->value) + 1;
  84                 efi_set_variable(efi_vars_guid, param->name, &efi_data);
  85         }
  86 }
  87
  88 static void get_active_consoles(struct config *config)
  89 {
  90         config->n_consoles = 0;
  91         config->consoles = talloc_array(config, char *, 3);
  92         if (!config->consoles)
  93                 return;
  94
  95         config->consoles[0] = talloc_asprintf(config,
  96                                         "/dev/hvc0 [IPMI / Serial]");
  97         config->consoles[1] = talloc_asprintf(config,
  98                                         "/dev/ttyAMA0 [Serial]");
  99         config->consoles[2] = talloc_asprintf(config,
 100                                         "/dev/tty1 [VGA]");
 101         config->n_consoles = 3;
 102 }
 103
 104 static int load_config(struct platform *p, struct config *config)
 105 {
 106         struct param_list *pl = to_platform_arm64(p)->params;
 107
 108         parse_nvram(pl);
 109         config_populate_all(config, pl);
 110         get_active_consoles(config);
 111
 112         return 0;
 113 }
 114
 115 static char *stdout_cleaner(struct process_stdout *out)
 116 {
 117         char *p;
 118         const char *const end = out->buf + out->len;
 119
 120         for (p = out->buf; *p && p < end; p++) {
 121                 if (*p == '\n' || *p == '\r') {
 122                         *p = 0;
 123                 } else if (!isprint(*p)) {
 124                         *p = '.';
 125                 } else if (*p == '\t') {
 126                         *p = ' ';
 127                 }
 128         }
 129         return out->buf;
 130 }
 131
 132 static int get_sysinfo(struct platform *p, struct system_info *sysinfo)
 133 {
 134         struct platform_arm64 *platform = to_platform_arm64(p);
 135         struct process_stdout *out1, *out2;
 136
 137         /* Use dmidecode to get sysinfo type and identifier. */
 138
 139         process_get_stdout(NULL, &out1, pb_system_apps.dmidecode,
 140                 "--string=system-manufacturer",
 141                 NULL);
 142         process_get_stdout(NULL, &out2, pb_system_apps.dmidecode,
 143                 "--string=system-product-name",
 144                 NULL);
 145
 146         if (out1 || out2)
 147                 sysinfo->type = talloc_asprintf(sysinfo, "%s %s",
 148                         out1 ? stdout_cleaner(out1) : "Unknown",
 149                         out2 ? stdout_cleaner(out2) : "Unknown");
 150         talloc_free(out1);
 151         talloc_free(out2);
 152
 153         process_get_stdout(NULL, &out1, pb_system_apps.dmidecode,
 154                 "--string=system-uuid",
 155                 NULL);
 156
 157         if (out1)
 158                 sysinfo->identifier = talloc_asprintf(sysinfo, "%s",
 159                         stdout_cleaner(out1));
 160         talloc_free(out1);
 161
 162         sysinfo->bmc_mac = talloc_zero_size(sysinfo, HWADDR_SIZE);
 163
 164         if (platform->ipmi) {
 165                 ipmi_get_bmc_mac(platform->ipmi, sysinfo->bmc_mac);
 166                 ipmi_get_bmc_versions(platform->ipmi, sysinfo);
 167         }
 168
 169         pb_debug_fn("type:       '%s'\n", sysinfo->type);
 170         pb_debug_fn("identifier: '%s'\n", sysinfo->identifier);
 171         pb_debug_fn("bmc_mac:    '%s'\n", sysinfo->bmc_mac);
 172
 173         return 0;
 174 }
 175
 176 static void params_update_all(struct param_list *pl,
 177         const struct config *config, const struct config *defaults)
 178 {
 179         char *tmp = NULL;
 180         const char *val;
 181
 182         if (config->autoboot_enabled == defaults->autoboot_enabled)
 183                 val = "";
 184         else
 185                 val = config->autoboot_enabled ? "true" : "false";
 186
 187         param_list_set_non_empty(pl, "auto-boot?", val, true);
 188
 189         if (config->autoboot_timeout_sec == defaults->autoboot_timeout_sec)
 190                 val = "";
 191         else
 192                 val = tmp = talloc_asprintf(pl, "%d",
 193                         config->autoboot_timeout_sec);
 194
 195         param_list_set_non_empty(pl, "petitboot,timeout", val, true);
 196         if (tmp)
 197                 talloc_free(tmp);
 198
 199         val = config->lang ?: "";
 200         param_list_set_non_empty(pl, "petitboot,language", val, true);
 201
 202         if (config->allow_writes == defaults->allow_writes)
 203                 val = "";
 204         else
 205                 val = config->allow_writes ? "true" : "false";
 206         param_list_set_non_empty(pl, "petitboot,write?", val, true);
 207
 208         if (!config->manual_console) {
 209                 val = config->boot_console ?: "";
 210                 param_list_set_non_empty(pl, "petitboot,console", val, true);
 211         }
 212
 213         val = config->http_proxy ?: "";
 214         param_list_set_non_empty(pl, "petitboot,http_proxy", val, true);
 215         val = config->https_proxy ?: "";
 216         param_list_set_non_empty(pl, "petitboot,https_proxy", val, true);
 217
 218         params_update_network_values(pl, "petitboot,network", config);
 219         params_update_bootdev_values(pl, "petitboot,bootdevs", config);
 220 }
 221
 222 static int save_config(struct platform *p, struct config *config)
 223 {
 224         struct param_list *pl = to_platform_arm64(p)->params;
 225         struct config *defaults;
 226
 227         defaults = talloc_zero(NULL, struct config);
 228         config_set_defaults(defaults);
 229
 230         params_update_all(pl, config, defaults);
 231         talloc_free(defaults);
 232
 233         write_nvram(pl);
 234
 235         return 0;
 236 }
 237
 238 static bool probe(struct platform *p, void *ctx)
 239 {
 240         static const char *efivars = "/sys/firmware/efi/efivars";
 241         struct platform_arm64 *platform;
 242         struct statfs buf;
 243
 244         if (access(efivars, R_OK | W_OK)) {
 245                 pb_debug_fn("Can't access %s\n", efivars);
 246                 return false;
 247         }
 248
 249         memset(&buf, '\0', sizeof(buf));
 250         if (statfs(efivars, &buf)) {
 251                 pb_debug_fn("statfs failed: %s: %s\n", efivars,
 252                         strerror(errno));
 253                 return false;
 254         }
 255
 256         if (buf.f_type != EFIVARFS_MAGIC) {
 257                 pb_debug_fn("Bad magic = 0x%lx\n", (unsigned long)buf.f_type);
 258                 return false;
 259         }
 260
 261         platform = talloc_zero(ctx, struct platform_arm64);
 262         platform->params = talloc_zero(platform, struct param_list);
 263         param_list_init(platform->params, common_known_params());
 264
 265         p->platform_data = platform;
 266
 267         return true;
 268 }
 269
 270 static struct platform platform_arm64 = {
 271         .name                   = "arm64",
 272         .dhcp_arch_id           = 0x000d,
 273         .probe                  = probe,
 274         .load_config            = load_config,
 275         .save_config            = save_config,
 276         .get_sysinfo            = get_sysinfo,
 277 };
 278
 279 register_platform(platform_arm64);