lib/smbios.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
   4  *
   5  * Adapted from coreboot src/arch/x86/smbios.c
   6  */
   7
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <env.h>
  11 #include <mapmem.h>
  12 #include <smbios.h>
  13 #include <tables_csum.h>
  14 #include <version.h>
  15 #ifdef CONFIG_CPU
  16 #include <cpu.h>
  17 #include <dm/uclass-internal.h>
  18 #endif
  19
  20 /**
  21  * smbios_add_string() - add a string to the string area
  22  *
  23  * This adds a string to the string area which is appended directly after
  24  * the formatted portion of an SMBIOS structure.
  25  *
  26  * @start:      string area start address
  27  * @str:        string to add
  28  * @return:     string number in the string area (1 or more)
  29  */
  30 static int smbios_add_string(char *start, const char *str)
  31 {
  32         int i = 1;
  33         char *p = start;
  34         if (!*str)
  35                 str = "Unknown";
  36
  37         for (;;) {
  38                 if (!*p) {
  39                         strcpy(p, str);
  40                         p += strlen(str);
  41                         *p++ = '\0';
  42                         *p++ = '\0';
  43
  44                         return i;
  45                 }
  46
  47                 if (!strcmp(p, str))
  48                         return i;
  49
  50                 p += strlen(p) + 1;
  51                 i++;
  52         }
  53 }
  54
  55 /**
  56  * smbios_string_table_len() - compute the string area size
  57  *
  58  * This computes the size of the string area including the string terminator.
  59  *
  60  * @start:      string area start address
  61  * @return:     string area size
  62  */
  63 static int smbios_string_table_len(char *start)
  64 {
  65         char *p = start;
  66         int i, len = 0;
  67
  68         while (*p) {
  69                 i = strlen(p) + 1;
  70                 p += i;
  71                 len += i;
  72         }
  73
  74         return len + 1;
  75 }
  76
  77 static int smbios_write_type0(ulong *current, int handle, ofnode node)
  78 {
  79         struct smbios_type0 *t;
  80         int len = sizeof(struct smbios_type0);
  81
  82         t = map_sysmem(*current, len);
  83         memset(t, 0, sizeof(struct smbios_type0));
  84         fill_smbios_header(t, SMBIOS_BIOS_INFORMATION, len, handle);
  85         t->vendor = smbios_add_string(t->eos, "U-Boot");
  86         t->bios_ver = smbios_add_string(t->eos, PLAIN_VERSION);
  87         t->bios_release_date = smbios_add_string(t->eos, U_BOOT_DMI_DATE);
  88 #ifdef CONFIG_ROM_SIZE
  89         t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
  90 #endif
  91         t->bios_characteristics = BIOS_CHARACTERISTICS_PCI_SUPPORTED |
  92                                   BIOS_CHARACTERISTICS_SELECTABLE_BOOT |
  93                                   BIOS_CHARACTERISTICS_UPGRADEABLE;
  94 #ifdef CONFIG_GENERATE_ACPI_TABLE
  95         t->bios_characteristics_ext1 = BIOS_CHARACTERISTICS_EXT1_ACPI;
  96 #endif
  97 #ifdef CONFIG_EFI_LOADER
  98         t->bios_characteristics_ext1 |= BIOS_CHARACTERISTICS_EXT1_UEFI;
  99 #endif
 100         t->bios_characteristics_ext2 = BIOS_CHARACTERISTICS_EXT2_TARGET;
 101
 102         t->bios_major_release = 0xff;
 103         t->bios_minor_release = 0xff;
 104         t->ec_major_release = 0xff;
 105         t->ec_minor_release = 0xff;
 106
 107         len = t->length + smbios_string_table_len(t->eos);
 108         *current += len;
 109         unmap_sysmem(t);
 110
 111         return len;
 112 }
 113
 114 static int smbios_write_type1(ulong *current, int handle, ofnode node)
 115 {
 116         struct smbios_type1 *t;
 117         int len = sizeof(struct smbios_type1);
 118         char *serial_str = env_get("serial#");
 119
 120         t = map_sysmem(*current, len);
 121         memset(t, 0, sizeof(struct smbios_type1));
 122         fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle);
 123         t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER);
 124         t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME);
 125         if (serial_str) {
 126                 strncpy((char *)t->uuid, serial_str, sizeof(t->uuid));
 127                 t->serial_number = smbios_add_string(t->eos, serial_str);
 128         }
 129
 130         len = t->length + smbios_string_table_len(t->eos);
 131         *current += len;
 132         unmap_sysmem(t);
 133
 134         return len;
 135 }
 136
 137 static int smbios_write_type2(ulong *current, int handle, ofnode node)
 138 {
 139         struct smbios_type2 *t;
 140         int len = sizeof(struct smbios_type2);
 141
 142         t = map_sysmem(*current, len);
 143         memset(t, 0, sizeof(struct smbios_type2));
 144         fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle);
 145         t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER);
 146         t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME);
 147         t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
 148         t->board_type = SMBIOS_BOARD_MOTHERBOARD;
 149
 150         len = t->length + smbios_string_table_len(t->eos);
 151         *current += len;
 152         unmap_sysmem(t);
 153
 154         return len;
 155 }
 156
 157 static int smbios_write_type3(ulong *current, int handle, ofnode node)
 158 {
 159         struct smbios_type3 *t;
 160         int len = sizeof(struct smbios_type3);
 161
 162         t = map_sysmem(*current, len);
 163         memset(t, 0, sizeof(struct smbios_type3));
 164         fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle);
 165         t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER);
 166         t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP;
 167         t->bootup_state = SMBIOS_STATE_SAFE;
 168         t->power_supply_state = SMBIOS_STATE_SAFE;
 169         t->thermal_state = SMBIOS_STATE_SAFE;
 170         t->security_status = SMBIOS_SECURITY_NONE;
 171
 172         len = t->length + smbios_string_table_len(t->eos);
 173         *current += len;
 174         unmap_sysmem(t);
 175
 176         return len;
 177 }
 178
 179 static void smbios_write_type4_dm(struct smbios_type4 *t, ofnode node)
 180 {
 181         u16 processor_family = SMBIOS_PROCESSOR_FAMILY_UNKNOWN;
 182         const char *vendor = "Unknown";
 183         const char *name = "Unknown";
 184
 185 #ifdef CONFIG_CPU
 186         char processor_name[49];
 187         char vendor_name[49];
 188         struct udevice *cpu = NULL;
 189
 190         uclass_find_first_device(UCLASS_CPU, &cpu);
 191         if (cpu) {
 192                 struct cpu_platdata *plat = dev_get_parent_platdata(cpu);
 193
 194                 if (plat->family)
 195                         processor_family = plat->family;
 196                 t->processor_id[0] = plat->id[0];
 197                 t->processor_id[1] = plat->id[1];
 198
 199                 if (!cpu_get_vendor(cpu, vendor_name, sizeof(vendor_name)))
 200                         vendor = vendor_name;
 201                 if (!cpu_get_desc(cpu, processor_name, sizeof(processor_name)))
 202                         name = processor_name;
 203         }
 204 #endif
 205
 206         t->processor_family = processor_family;
 207         t->processor_manufacturer = smbios_add_string(t->eos, vendor);
 208         t->processor_version = smbios_add_string(t->eos, name);
 209 }
 210
 211 static int smbios_write_type4(ulong *current, int handle, ofnode node)
 212 {
 213         struct smbios_type4 *t;
 214         int len = sizeof(struct smbios_type4);
 215
 216         t = map_sysmem(*current, len);
 217         memset(t, 0, sizeof(struct smbios_type4));
 218         fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle);
 219         t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
 220         smbios_write_type4_dm(t, node);
 221         t->status = SMBIOS_PROCESSOR_STATUS_ENABLED;
 222         t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE;
 223         t->l1_cache_handle = 0xffff;
 224         t->l2_cache_handle = 0xffff;
 225         t->l3_cache_handle = 0xffff;
 226         t->processor_family2 = t->processor_family;
 227
 228         len = t->length + smbios_string_table_len(t->eos);
 229         *current += len;
 230         unmap_sysmem(t);
 231
 232         return len;
 233 }
 234
 235 static int smbios_write_type32(ulong *current, int handle, ofnode node)
 236 {
 237         struct smbios_type32 *t;
 238         int len = sizeof(struct smbios_type32);
 239
 240         t = map_sysmem(*current, len);
 241         memset(t, 0, sizeof(struct smbios_type32));
 242         fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle);
 243
 244         *current += len;
 245         unmap_sysmem(t);
 246
 247         return len;
 248 }
 249
 250 static int smbios_write_type127(ulong *current, int handle, ofnode node)
 251 {
 252         struct smbios_type127 *t;
 253         int len = sizeof(struct smbios_type127);
 254
 255         t = map_sysmem(*current, len);
 256         memset(t, 0, sizeof(struct smbios_type127));
 257         fill_smbios_header(t, SMBIOS_END_OF_TABLE, len, handle);
 258
 259         *current += len;
 260         unmap_sysmem(t);
 261
 262         return len;
 263 }
 264
 265 static smbios_write_type smbios_write_funcs[] = {
 266         smbios_write_type0,
 267         smbios_write_type1,
 268         smbios_write_type2,
 269         smbios_write_type3,
 270         smbios_write_type4,
 271         smbios_write_type32,
 272         smbios_write_type127
 273 };
 274
 275 ulong write_smbios_table(ulong addr)
 276 {
 277         ofnode node = ofnode_null();
 278         struct smbios_entry *se;
 279         struct udevice *dev;
 280         ulong table_addr;
 281         ulong tables;
 282         int len = 0;
 283         int max_struct_size = 0;
 284         int handle = 0;
 285         char *istart;
 286         int isize;
 287         int i;
 288
 289         if (IS_ENABLED(CONFIG_OF_CONTROL)) {
 290                 uclass_first_device(UCLASS_SYSINFO, &dev);
 291                 if (dev)
 292                         node = dev_read_subnode(dev, "smbios");
 293         }
 294
 295         /* 16 byte align the table address */
 296         addr = ALIGN(addr, 16);
 297
 298         se = map_sysmem(addr, sizeof(struct smbios_entry));
 299         memset(se, 0, sizeof(struct smbios_entry));
 300
 301         addr += sizeof(struct smbios_entry);
 302         addr = ALIGN(addr, 16);
 303         tables = addr;
 304
 305         /* populate minimum required tables */
 306         for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) {
 307                 int tmp = smbios_write_funcs[i]((ulong *)&addr, handle++, node);
 308
 309                 max_struct_size = max(max_struct_size, tmp);
 310                 len += tmp;
 311         }
 312
 313         memcpy(se->anchor, "_SM_", 4);
 314         se->length = sizeof(struct smbios_entry);
 315         se->major_ver = SMBIOS_MAJOR_VER;
 316         se->minor_ver = SMBIOS_MINOR_VER;
 317         se->max_struct_size = max_struct_size;
 318         memcpy(se->intermediate_anchor, "_DMI_", 5);
 319         se->struct_table_length = len;
 320
 321         /*
 322          * We must use a pointer here so things work correctly on sandbox. The
 323          * user of this table is not aware of the mapping of addresses to
 324          * sandbox's DRAM buffer.
 325          */
 326         table_addr = (ulong)map_sysmem(tables, 0);
 327         if (sizeof(table_addr) > sizeof(u32) && table_addr > (ulong)UINT_MAX) {
 328                 /*
 329                  * We need to put this >32-bit pointer into the table but the
 330                  * field is only 32 bits wide.
 331                  */
 332                 printf("WARNING: SMBIOS table_address overflow %llx\n",
 333                        (unsigned long long)table_addr);
 334                 table_addr = 0;
 335         }
 336         se->struct_table_address = table_addr;
 337
 338         se->struct_count = handle;
 339
 340         /* calculate checksums */
 341         istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET;
 342         isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET;
 343         se->intermediate_checksum = table_compute_checksum(istart, isize);
 344         se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry));
 345         unmap_sysmem(se);
 346
 347         return addr;
 348 }