U-Boot can either generated an SMBIOS table or copy it from a prior boot stage, e.g. QEMU.
Provide a command to display the SMBIOS information.
Currently only type 1 and 2 are translated to human readable text. Other types may be added later. Currently only a hexdump and the list of strings is provided for these.
Signed-off-by: Heinrich Schuchardt heinrich.schuchardt@canonical.com Reviewed-by: Simon Glass sjg@chromium.org Reviewed-by: Ilias Apalodimas ilias.apalodimas@linaro.org --- v3: do not enable the command by default v2: email address updated --- cmd/Kconfig | 6 ++ cmd/Makefile | 1 + cmd/smbios.c | 191 +++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 198 insertions(+) create mode 100644 cmd/smbios.c
diff --git a/cmd/Kconfig b/cmd/Kconfig index 58ab357c707..435bb04e551 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -232,6 +232,12 @@ config CMD_SBI help Display information about the SBI implementation.
+config CMD_SMBIOS + bool "smbios" + depends on SMBIOS + help + Display the SMBIOS information. + endmenu
menu "Boot commands" diff --git a/cmd/Makefile b/cmd/Makefile index e2a2b16ab25..87133cc27a8 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -168,6 +168,7 @@ obj-$(CONFIG_CMD_SETEXPR) += setexpr.o obj-$(CONFIG_CMD_SETEXPR_FMT) += printf.o obj-$(CONFIG_CMD_SPI) += spi.o obj-$(CONFIG_CMD_STRINGS) += strings.o +obj-$(CONFIG_CMD_SMBIOS) += smbios.o obj-$(CONFIG_CMD_SMC) += smccc.o obj-$(CONFIG_CMD_SYSBOOT) += sysboot.o obj-$(CONFIG_CMD_STACKPROTECTOR_TEST) += stackprot_test.o diff --git a/cmd/smbios.c b/cmd/smbios.c new file mode 100644 index 00000000000..feebf930b79 --- /dev/null +++ b/cmd/smbios.c @@ -0,0 +1,191 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * The 'smbios' command displays information from the SMBIOS table. + * + * Copyright (c) 2023, Heinrich Schuchardt heinrich.schuchardt@canonical.com + */ + +#include <command.h> +#include <hexdump.h> +#include <mapmem.h> +#include <smbios.h> +#include <tables_csum.h> +#include <asm/global_data.h> + +DECLARE_GLOBAL_DATA_PTR; + +/** + * smbios_get_string() - get SMBIOS string from table + * + * @table: SMBIOS table + * @index: index of the string + * Return: address of string, may point to empty string + */ +static const char *smbios_get_string(void *table, int index) +{ + const char *str = (char *)table + + ((struct smbios_header *)table)->length; + + if (!*str) + ++str; + for (--index; *str && index; --index) + str += strlen(str) + 1; + + return str; +} + +static struct smbios_header *next_table(struct smbios_header *table) +{ + const char *str; + + if (table->type == SMBIOS_END_OF_TABLE) + return NULL; + + str = smbios_get_string(table, 0); + return (struct smbios_header *)(++str); +} + +static void smbios_print_generic(struct smbios_header *table) +{ + char *str = (char *)table + table->length; + + if (CONFIG_IS_ENABLED(HEXDUMP)) { + printf("Header and Data:\n"); + print_hex_dump("\t", DUMP_PREFIX_OFFSET, 16, 1, + table, table->length, false); + } + if (*str) { + printf("Strings:\n"); + for (int index = 1; *str; ++index) { + printf("\tString %u: %s\n", index, str); + str += strlen(str) + 1; + } + } +} + +void smbios_print_str(const char *label, void *table, u8 index) +{ + printf("\t%s: %s\n", label, smbios_get_string(table, index)); +} + +static void smbios_print_type1(struct smbios_type1 *table) +{ + printf("System Information\n"); + smbios_print_str("Manufacturer", table, table->manufacturer); + smbios_print_str("Product Name", table, table->product_name); + smbios_print_str("Version", table, table->version); + smbios_print_str("Serial Number", table, table->serial_number); + if (table->length >= 0x19) { + printf("\tUUID %pUl\n", table->uuid); + smbios_print_str("Wake Up Type", table, table->serial_number); + } + if (table->length >= 0x1b) { + smbios_print_str("Serial Number", table, table->serial_number); + smbios_print_str("SKU Number", table, table->sku_number); + } +} + +static void smbios_print_type2(struct smbios_type2 *table) +{ + u16 *handle; + + printf("Base Board Information\n"); + smbios_print_str("Manufacturer", table, table->manufacturer); + smbios_print_str("Product Name", table, table->product_name); + smbios_print_str("Version", table, table->version); + smbios_print_str("Serial Number", table, table->serial_number); + smbios_print_str("Asset Tag", table, table->asset_tag_number); + printf("\tFeature Flags: 0x%2x\n", table->feature_flags); + smbios_print_str("Chassis Location", table, table->chassis_location); + printf("\tChassis Handle: 0x%2x\n", table->chassis_handle); + smbios_print_str("Board Type", table, table->board_type); + printf("\tContained Object Handles: "); + handle = (void *)table->eos; + for (int i = 0; i < table->number_contained_objects; ++i) + printf("0x%04x ", handle[i]); + printf("\n"); +} + +static void smbios_print_type127(struct smbios_type127 *table) +{ + printf("End Of Table\n"); +} + +static int do_smbios(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + ulong addr; + void *entry; + u32 size; + char version[12]; + struct smbios_header *table; + static const char smbios_sig[] = "_SM_"; + static const char smbios3_sig[] = "_SM3_"; + size_t count = 0; + u32 max_struct_size; + + addr = gd_smbios_start(); + if (!addr) { + log_warning("SMBIOS not available\n"); + return CMD_RET_FAILURE; + } + entry = map_sysmem(addr, 0); + if (!memcmp(entry, smbios3_sig, sizeof(smbios3_sig) - 1)) { + struct smbios3_entry *entry3 = entry; + + table = (void *)(uintptr_t)entry3->struct_table_address; + snprintf(version, sizeof(version), "%d.%d.%d", + entry3->major_ver, entry3->minor_ver, entry3->doc_rev); + table = (void *)(uintptr_t)entry3->struct_table_address; + size = entry3->length; + max_struct_size = entry3->max_struct_size; + } else if (!memcmp(entry, smbios_sig, sizeof(smbios_sig) - 1)) { + struct smbios_entry *entry2 = entry; + + snprintf(version, sizeof(version), "%d.%d", + entry2->major_ver, entry2->minor_ver); + table = (void *)(uintptr_t)entry2->struct_table_address; + size = entry2->length; + max_struct_size = entry2->max_struct_size; + } else { + log_err("Unknown SMBIOS anchor format\n"); + return CMD_RET_FAILURE; + } + if (table_compute_checksum(entry, size)) { + log_err("Invalid anchor checksum\n"); + return CMD_RET_FAILURE; + } + printf("SMBIOS %s present.\n", version); + + for (struct smbios_header *pos = table; pos; pos = next_table(pos)) + ++count; + printf("%zd structures occupying %d bytes\n", count, max_struct_size); + printf("Table at 0x%llx\n", (unsigned long long)map_to_sysmem(table)); + + for (struct smbios_header *pos = table; pos; pos = next_table(pos)) { + printf("\nHandle 0x%04x, DMI type %d, %d bytes at 0x%llx\n", + pos->handle, pos->type, pos->length, + (unsigned long long)map_to_sysmem(pos)); + switch (pos->type) { + case 1: + smbios_print_type1((struct smbios_type1 *)pos); + break; + case 2: + smbios_print_type2((struct smbios_type2 *)pos); + break; + case 127: + smbios_print_type127((struct smbios_type127 *)pos); + break; + default: + smbios_print_generic(pos); + break; + } + } + + return CMD_RET_SUCCESS; +} + +U_BOOT_LONGHELP(smbios, "- display SMBIOS information"); + +U_BOOT_CMD(smbios, 1, 0, do_smbios, "display SMBIOS information", + smbios_help_text);