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 = EFI_DEFALT_ATTRIBUTES;
  74
  75         param_list_for_each(pl, param) {
  76                 if (!param->modified)
  77                         continue;
  78
  79                 efi_data.data = param->value;
  80                 efi_data.data_size = strlen(param->value) + 1;
  81                 efi_set_variable(efi_vars_guid, param->name, &efi_data);
  82         }
  83 }
  84
  85 static void get_active_consoles(struct config *config)
  86 {
  87         config->n_consoles = 0;
  88         config->consoles = talloc_array(config, char *, 3);
  89         if (!config->consoles)
  90                 return;
  91
  92         config->consoles[0] = talloc_asprintf(config,
  93                                         "/dev/hvc0 [IPMI / Serial]");
  94         config->consoles[1] = talloc_asprintf(config,
  95                                         "/dev/ttyAMA0 [Serial]");
  96         config->consoles[2] = talloc_asprintf(config,
  97                                         "/dev/tty1 [VGA]");
  98         config->n_consoles = 3;
  99 }
 100
 101 static int load_config(struct platform *p, struct config *config)
 102 {
 103         struct param_list *pl = to_platform_arm64(p)->params;
 104
 105         parse_nvram(pl);
 106         config_populate_all(config, pl);
 107         get_active_consoles(config);
 108
 109         return 0;
 110 }
 111
 112 static char *stdout_cleaner(struct process_stdout *out)
 113 {
 114         char *p;
 115         const char *const end = out->buf + out->len;
 116
 117         for (p = out->buf; *p && p < end; p++) {
 118                 if (*p == '\n' || *p == '\r') {
 119                         *p = 0;
 120                 } else if (!isprint(*p)) {
 121                         *p = '.';
 122                 } else if (*p == '\t') {
 123                         *p = ' ';
 124                 }
 125         }
 126         return out->buf;
 127 }
 128
 129 static int get_sysinfo(struct platform *p, struct system_info *sysinfo)
 130 {
 131         struct platform_arm64 *platform = to_platform_arm64(p);
 132         struct process_stdout *out1, *out2;
 133
 134         /* Use dmidecode to get sysinfo type and identifier. */
 135
 136         process_get_stdout(NULL, &out1, pb_system_apps.dmidecode,
 137                 "--string=system-manufacturer",
 138                 NULL);
 139         process_get_stdout(NULL, &out2, pb_system_apps.dmidecode,
 140                 "--string=system-product-name",
 141                 NULL);
 142
 143         if (out1 || out2)
 144                 sysinfo->type = talloc_asprintf(sysinfo, "%s %s",
 145                         out1 ? stdout_cleaner(out1) : "Unknown",
 146                         out2 ? stdout_cleaner(out2) : "Unknown");
 147         talloc_free(out1);
 148         talloc_free(out2);
 149
 150         process_get_stdout(NULL, &out1, pb_system_apps.dmidecode,
 151                 "--string=system-uuid",
 152                 NULL);
 153
 154         if (out1)
 155                 sysinfo->identifier = talloc_asprintf(sysinfo, "%s",
 156                         stdout_cleaner(out1));
 157         talloc_free(out1);
 158
 159         sysinfo->bmc_mac = talloc_zero_size(sysinfo, HWADDR_SIZE);
 160
 161         if (platform->ipmi) {
 162                 ipmi_get_bmc_mac(platform->ipmi, sysinfo->bmc_mac);
 163                 ipmi_get_bmc_versions(platform->ipmi, sysinfo);
 164         }
 165
 166         pb_debug_fn("type:       '%s'\n", sysinfo->type);
 167         pb_debug_fn("identifier: '%s'\n", sysinfo->identifier);
 168         pb_debug_fn("bmc_mac:    '%s'\n", sysinfo->bmc_mac);
 169
 170         return 0;
 171 }
 172
 173 static void params_update_all(struct param_list *pl,
 174         const struct config *config, const struct config *defaults)
 175 {
 176         char *tmp = NULL;
 177         const char *val;
 178
 179         if (config->autoboot_enabled == defaults->autoboot_enabled)
 180                 val = "";
 181         else
 182                 val = config->autoboot_enabled ? "true" : "false";
 183
 184         param_list_set_non_empty(pl, "auto-boot?", val, true);
 185
 186         if (config->autoboot_timeout_sec == defaults->autoboot_timeout_sec)
 187                 val = "";
 188         else
 189                 val = tmp = talloc_asprintf(pl, "%d",
 190                         config->autoboot_timeout_sec);
 191
 192         param_list_set_non_empty(pl, "petitboot,timeout", val, true);
 193         if (tmp)
 194                 talloc_free(tmp);
 195
 196         val = config->lang ?: "";
 197         param_list_set_non_empty(pl, "petitboot,language", val, true);
 198
 199         if (config->allow_writes == defaults->allow_writes)
 200                 val = "";
 201         else
 202                 val = config->allow_writes ? "true" : "false";
 203         param_list_set_non_empty(pl, "petitboot,write?", val, true);
 204
 205         if (!config->manual_console) {
 206                 val = config->boot_console ?: "";
 207                 param_list_set_non_empty(pl, "petitboot,console", val, true);
 208         }
 209
 210         val = config->http_proxy ?: "";
 211         param_list_set_non_empty(pl, "petitboot,http_proxy", val, true);
 212         val = config->https_proxy ?: "";
 213         param_list_set_non_empty(pl, "petitboot,https_proxy", val, true);
 214
 215         params_update_network_values(pl, "petitboot,network", config);
 216         params_update_bootdev_values(pl, "petitboot,bootdevs", config);
 217 }
 218
 219 static int save_config(struct platform *p, struct config *config)
 220 {
 221         struct param_list *pl = to_platform_arm64(p)->params;
 222         struct config *defaults;
 223
 224         defaults = talloc_zero(NULL, struct config);
 225         config_set_defaults(defaults);
 226
 227         params_update_all(pl, config, defaults);
 228         talloc_free(defaults);
 229
 230         write_nvram(pl);
 231
 232         return 0;
 233 }
 234
 235 static bool probe(struct platform *p, void *ctx)
 236 {
 237         static const char *efivars = "/sys/firmware/efi/efivars";
 238         struct platform_arm64 *platform;
 239         struct statfs buf;
 240
 241         if (access(efivars, R_OK | W_OK)) {
 242                 pb_debug_fn("Can't access %s\n", efivars);
 243                 return false;
 244         }
 245
 246         memset(&buf, '\0', sizeof(buf));
 247         if (statfs(efivars, &buf)) {
 248                 pb_debug_fn("statfs failed: %s: %s\n", efivars,
 249                         strerror(errno));
 250                 return false;
 251         }
 252
 253         if (buf.f_type != EFIVARFS_MAGIC) {
 254                 pb_debug_fn("Bad magic = 0x%lx\n", (unsigned long)buf.f_type);
 255                 return false;
 256         }
 257
 258         platform = talloc_zero(ctx, struct platform_arm64);
 259         platform->params = talloc_zero(platform, struct param_list);
 260         param_list_init(platform->params, common_known_params());
 261
 262         p->platform_data = platform;
 263
 264         return true;
 265 }
 266
 267 static struct platform platform_arm64 = {
 268         .name                   = "arm64",
 269         .dhcp_arch_id           = 0x000d,
 270         .probe                  = probe,
 271         .load_config            = load_config,
 272         .save_config            = save_config,
 273         .get_sysinfo            = get_sysinfo,
 274 };
 275
 276 register_platform(platform_arm64);