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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
- *
- * Adapted from coreboot src/arch/x86/smbios.c
- */
- #include <common.h>
- #include <dm.h>
- #include <env.h>
- #include <linux/stringify.h>
- #include <mapmem.h>
- #include <smbios.h>
- #include <sysinfo.h>
- #include <tables_csum.h>
- #include <version.h>
- #ifdef CONFIG_CPU
- #include <cpu.h>
- #include <dm/uclass-internal.h>
- #endif
- /* Safeguard for checking that U_BOOT_VERSION_NUM macros are compatible with U_BOOT_DMI */
- #if U_BOOT_VERSION_NUM < 2000 || U_BOOT_VERSION_NUM > 2099 || \
- U_BOOT_VERSION_NUM_PATCH < 1 || U_BOOT_VERSION_NUM_PATCH > 12
- #error U_BOOT_VERSION_NUM macros are not compatible with DMI, fix U_BOOT_DMI macros
- #endif
- /*
- * U_BOOT_DMI_DATE contains BIOS Release Date in format mm/dd/yyyy.
- * BIOS Release Date is calculated from U-Boot version and fixed day 01.
- * So for U-Boot version 2021.04 it is calculated as "04/01/2021".
- * BIOS Release Date should contain date when code was released
- * and not when it was built or compiled.
- */
- #if U_BOOT_VERSION_NUM_PATCH < 10
- #define U_BOOT_DMI_MONTH "0" __stringify(U_BOOT_VERSION_NUM_PATCH)
- #else
- #define U_BOOT_DMI_MONTH __stringify(U_BOOT_VERSION_NUM_PATCH)
- #endif
- #define U_BOOT_DMI_DAY "01"
- #define U_BOOT_DMI_YEAR __stringify(U_BOOT_VERSION_NUM)
- #define U_BOOT_DMI_DATE U_BOOT_DMI_MONTH "/" U_BOOT_DMI_DAY "/" U_BOOT_DMI_YEAR
- DECLARE_GLOBAL_DATA_PTR;
- /**
- * struct smbios_ctx - context for writing SMBIOS tables
- *
- * @node: node containing the information to write (ofnode_null() if none)
- * @dev: sysinfo device to use (NULL if none)
- * @eos: end-of-string pointer for the table being processed. This is set
- * up when we start processing a table
- * @next_ptr: pointer to the start of the next string to be added. When the
- * table is nopt empty, this points to the byte after the \0 of the
- * previous string.
- * @last_str: points to the last string that was written to the table, or NULL
- * if none
- */
- struct smbios_ctx {
- ofnode node;
- struct udevice *dev;
- char *eos;
- char *next_ptr;
- char *last_str;
- };
- /**
- * Function prototype to write a specific type of SMBIOS structure
- *
- * @addr: start address to write the structure
- * @handle: the structure's handle, a unique 16-bit number
- * @ctx: context for writing the tables
- * Return: size of the structure
- */
- typedef int (*smbios_write_type)(ulong *addr, int handle,
- struct smbios_ctx *ctx);
- /**
- * struct smbios_write_method - Information about a table-writing function
- *
- * @write: Function to call
- * @subnode_name: Name of subnode which has the information for this function,
- * NULL if none
- */
- struct smbios_write_method {
- smbios_write_type write;
- const char *subnode_name;
- };
- /**
- * smbios_add_string() - add a string to the string area
- *
- * This adds a string to the string area which is appended directly after
- * the formatted portion of an SMBIOS structure.
- *
- * @ctx: SMBIOS context
- * @str: string to add
- * Return: string number in the string area (1 or more)
- */
- static int smbios_add_string(struct smbios_ctx *ctx, const char *str)
- {
- int i = 1;
- char *p = ctx->eos;
- if (!*str)
- str = "Unknown";
- for (;;) {
- if (!*p) {
- ctx->last_str = p;
- strcpy(p, str);
- p += strlen(str);
- *p++ = '\0';
- ctx->next_ptr = p;
- *p++ = '\0';
- return i;
- }
- if (!strcmp(p, str)) {
- ctx->last_str = p;
- return i;
- }
- p += strlen(p) + 1;
- i++;
- }
- }
- /**
- * smbios_add_prop_si() - Add a property from the devicetree or sysinfo
- *
- * Sysinfo is used if available, with a fallback to devicetree
- *
- * @ctx: context for writing the tables
- * @prop: property to write
- * Return: 0 if not found, else SMBIOS string number (1 or more)
- */
- static int smbios_add_prop_si(struct smbios_ctx *ctx, const char *prop,
- int sysinfo_id)
- {
- if (sysinfo_id && ctx->dev) {
- char val[SMBIOS_STR_MAX];
- int ret;
- ret = sysinfo_get_str(ctx->dev, sysinfo_id, sizeof(val), val);
- if (!ret)
- return smbios_add_string(ctx, val);
- }
- if (IS_ENABLED(CONFIG_OF_CONTROL)) {
- const char *str;
- str = ofnode_read_string(ctx->node, prop);
- if (str)
- return smbios_add_string(ctx, str);
- }
- return 0;
- }
- /**
- * smbios_add_prop() - Add a property from the devicetree
- *
- * @prop: property to write
- * Return: 0 if not found, else SMBIOS string number (1 or more)
- */
- static int smbios_add_prop(struct smbios_ctx *ctx, const char *prop)
- {
- return smbios_add_prop_si(ctx, prop, SYSINFO_ID_NONE);
- }
- static void smbios_set_eos(struct smbios_ctx *ctx, char *eos)
- {
- ctx->eos = eos;
- ctx->next_ptr = eos;
- ctx->last_str = NULL;
- }
- int smbios_update_version(const char *version)
- {
- char *ptr = gd->smbios_version;
- uint old_len, len;
- if (!ptr)
- return log_ret(-ENOENT);
- /*
- * This string is supposed to have at least enough bytes and is
- * padded with spaces. Update it, taking care not to move the
- * \0 terminator, so that other strings in the string table
- * are not disturbed. See smbios_add_string()
- */
- old_len = strnlen(ptr, SMBIOS_STR_MAX);
- len = strnlen(version, SMBIOS_STR_MAX);
- if (len > old_len)
- return log_ret(-ENOSPC);
- log_debug("Replacing SMBIOS type 0 version string '%s'\n", ptr);
- memcpy(ptr, version, len);
- #ifdef LOG_DEBUG
- print_buffer((ulong)ptr, ptr, 1, old_len + 1, 0);
- #endif
- return 0;
- }
- /**
- * smbios_string_table_len() - compute the string area size
- *
- * This computes the size of the string area including the string terminator.
- *
- * @ctx: SMBIOS context
- * Return: string area size
- */
- static int smbios_string_table_len(const struct smbios_ctx *ctx)
- {
- /* Allow for the final \0 after all strings */
- return (ctx->next_ptr + 1) - ctx->eos;
- }
- static int smbios_write_type0(ulong *current, int handle,
- struct smbios_ctx *ctx)
- {
- struct smbios_type0 *t;
- int len = sizeof(struct smbios_type0);
- t = map_sysmem(*current, len);
- memset(t, 0, sizeof(struct smbios_type0));
- fill_smbios_header(t, SMBIOS_BIOS_INFORMATION, len, handle);
- smbios_set_eos(ctx, t->eos);
- t->vendor = smbios_add_string(ctx, "U-Boot");
- t->bios_ver = smbios_add_prop(ctx, "version");
- if (!t->bios_ver)
- t->bios_ver = smbios_add_string(ctx, PLAIN_VERSION);
- if (t->bios_ver)
- gd->smbios_version = ctx->last_str;
- log_debug("smbios_version = %p: '%s'\n", gd->smbios_version,
- gd->smbios_version);
- #ifdef LOG_DEBUG
- print_buffer((ulong)gd->smbios_version, gd->smbios_version,
- 1, strlen(gd->smbios_version) + 1, 0);
- #endif
- t->bios_release_date = smbios_add_string(ctx, U_BOOT_DMI_DATE);
- #ifdef CONFIG_ROM_SIZE
- t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
- #endif
- t->bios_characteristics = BIOS_CHARACTERISTICS_PCI_SUPPORTED |
- BIOS_CHARACTERISTICS_SELECTABLE_BOOT |
- BIOS_CHARACTERISTICS_UPGRADEABLE;
- #ifdef CONFIG_GENERATE_ACPI_TABLE
- t->bios_characteristics_ext1 = BIOS_CHARACTERISTICS_EXT1_ACPI;
- #endif
- #ifdef CONFIG_EFI_LOADER
- t->bios_characteristics_ext2 |= BIOS_CHARACTERISTICS_EXT2_UEFI;
- #endif
- t->bios_characteristics_ext2 |= BIOS_CHARACTERISTICS_EXT2_TARGET;
- /* bios_major_release has only one byte, so drop century */
- t->bios_major_release = U_BOOT_VERSION_NUM % 100;
- t->bios_minor_release = U_BOOT_VERSION_NUM_PATCH;
- t->ec_major_release = 0xff;
- t->ec_minor_release = 0xff;
- len = t->length + smbios_string_table_len(ctx);
- *current += len;
- unmap_sysmem(t);
- return len;
- }
- static int smbios_write_type1(ulong *current, int handle,
- struct smbios_ctx *ctx)
- {
- struct smbios_type1 *t;
- int len = sizeof(struct smbios_type1);
- char *serial_str = env_get("serial#");
- t = map_sysmem(*current, len);
- memset(t, 0, sizeof(struct smbios_type1));
- fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle);
- smbios_set_eos(ctx, t->eos);
- t->manufacturer = smbios_add_prop(ctx, "manufacturer");
- if (!t->manufacturer)
- t->manufacturer = smbios_add_string(ctx, "Unknown");
- t->product_name = smbios_add_prop(ctx, "product");
- if (!t->product_name)
- t->product_name = smbios_add_string(ctx, "Unknown Product");
- t->version = smbios_add_prop_si(ctx, "version",
- SYSINFO_ID_SMBIOS_SYSTEM_VERSION);
- if (serial_str) {
- t->serial_number = smbios_add_string(ctx, serial_str);
- strncpy((char *)t->uuid, serial_str, sizeof(t->uuid));
- } else {
- t->serial_number = smbios_add_prop(ctx, "serial");
- }
- t->sku_number = smbios_add_prop(ctx, "sku");
- t->family = smbios_add_prop(ctx, "family");
- len = t->length + smbios_string_table_len(ctx);
- *current += len;
- unmap_sysmem(t);
- return len;
- }
- static int smbios_write_type2(ulong *current, int handle,
- struct smbios_ctx *ctx)
- {
- struct smbios_type2 *t;
- int len = sizeof(struct smbios_type2);
- t = map_sysmem(*current, len);
- memset(t, 0, sizeof(struct smbios_type2));
- fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle);
- smbios_set_eos(ctx, t->eos);
- t->manufacturer = smbios_add_prop(ctx, "manufacturer");
- if (!t->manufacturer)
- t->manufacturer = smbios_add_string(ctx, "Unknown");
- t->product_name = smbios_add_prop(ctx, "product");
- if (!t->product_name)
- t->product_name = smbios_add_string(ctx, "Unknown Product");
- t->version = smbios_add_prop_si(ctx, "version",
- SYSINFO_ID_SMBIOS_BASEBOARD_VERSION);
- t->asset_tag_number = smbios_add_prop(ctx, "asset-tag");
- t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
- t->board_type = SMBIOS_BOARD_MOTHERBOARD;
- len = t->length + smbios_string_table_len(ctx);
- *current += len;
- unmap_sysmem(t);
- return len;
- }
- static int smbios_write_type3(ulong *current, int handle,
- struct smbios_ctx *ctx)
- {
- struct smbios_type3 *t;
- int len = sizeof(struct smbios_type3);
- t = map_sysmem(*current, len);
- memset(t, 0, sizeof(struct smbios_type3));
- fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle);
- smbios_set_eos(ctx, t->eos);
- t->manufacturer = smbios_add_prop(ctx, "manufacturer");
- if (!t->manufacturer)
- t->manufacturer = smbios_add_string(ctx, "Unknown");
- t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP;
- t->bootup_state = SMBIOS_STATE_SAFE;
- t->power_supply_state = SMBIOS_STATE_SAFE;
- t->thermal_state = SMBIOS_STATE_SAFE;
- t->security_status = SMBIOS_SECURITY_NONE;
- len = t->length + smbios_string_table_len(ctx);
- *current += len;
- unmap_sysmem(t);
- return len;
- }
- static void smbios_write_type4_dm(struct smbios_type4 *t,
- struct smbios_ctx *ctx)
- {
- u16 processor_family = SMBIOS_PROCESSOR_FAMILY_UNKNOWN;
- const char *vendor = "Unknown";
- const char *name = "Unknown";
- #ifdef CONFIG_CPU
- char processor_name[49];
- char vendor_name[49];
- struct udevice *cpu = NULL;
- uclass_find_first_device(UCLASS_CPU, &cpu);
- if (cpu) {
- struct cpu_plat *plat = dev_get_parent_plat(cpu);
- if (plat->family)
- processor_family = plat->family;
- t->processor_id[0] = plat->id[0];
- t->processor_id[1] = plat->id[1];
- if (!cpu_get_vendor(cpu, vendor_name, sizeof(vendor_name)))
- vendor = vendor_name;
- if (!cpu_get_desc(cpu, processor_name, sizeof(processor_name)))
- name = processor_name;
- }
- #endif
- t->processor_family = processor_family;
- t->processor_manufacturer = smbios_add_string(ctx, vendor);
- t->processor_version = smbios_add_string(ctx, name);
- }
- static int smbios_write_type4(ulong *current, int handle,
- struct smbios_ctx *ctx)
- {
- struct smbios_type4 *t;
- int len = sizeof(struct smbios_type4);
- t = map_sysmem(*current, len);
- memset(t, 0, sizeof(struct smbios_type4));
- fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle);
- smbios_set_eos(ctx, t->eos);
- t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
- smbios_write_type4_dm(t, ctx);
- t->status = SMBIOS_PROCESSOR_STATUS_ENABLED;
- t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE;
- t->l1_cache_handle = 0xffff;
- t->l2_cache_handle = 0xffff;
- t->l3_cache_handle = 0xffff;
- t->processor_family2 = t->processor_family;
- len = t->length + smbios_string_table_len(ctx);
- *current += len;
- unmap_sysmem(t);
- return len;
- }
- static int smbios_write_type32(ulong *current, int handle,
- struct smbios_ctx *ctx)
- {
- struct smbios_type32 *t;
- int len = sizeof(struct smbios_type32);
- t = map_sysmem(*current, len);
- memset(t, 0, sizeof(struct smbios_type32));
- fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle);
- smbios_set_eos(ctx, t->eos);
- *current += len;
- unmap_sysmem(t);
- return len;
- }
- static int smbios_write_type127(ulong *current, int handle,
- struct smbios_ctx *ctx)
- {
- struct smbios_type127 *t;
- int len = sizeof(struct smbios_type127);
- t = map_sysmem(*current, len);
- memset(t, 0, sizeof(struct smbios_type127));
- fill_smbios_header(t, SMBIOS_END_OF_TABLE, len, handle);
- *current += len;
- unmap_sysmem(t);
- return len;
- }
- static struct smbios_write_method smbios_write_funcs[] = {
- { smbios_write_type0, "bios", },
- { smbios_write_type1, "system", },
- { smbios_write_type2, "baseboard", },
- { smbios_write_type3, "chassis", },
- { smbios_write_type4, },
- { smbios_write_type32, },
- { smbios_write_type127 },
- };
- ulong write_smbios_table(ulong addr)
- {
- ofnode parent_node = ofnode_null();
- struct smbios_entry *se;
- struct smbios_ctx ctx;
- ulong table_addr;
- ulong tables;
- int len = 0;
- int max_struct_size = 0;
- int handle = 0;
- char *istart;
- int isize;
- int i;
- ctx.node = ofnode_null();
- if (IS_ENABLED(CONFIG_OF_CONTROL)) {
- uclass_first_device(UCLASS_SYSINFO, &ctx.dev);
- if (ctx.dev)
- parent_node = dev_read_subnode(ctx.dev, "smbios");
- } else {
- ctx.dev = NULL;
- }
- /* 16 byte align the table address */
- addr = ALIGN(addr, 16);
- se = map_sysmem(addr, sizeof(struct smbios_entry));
- memset(se, 0, sizeof(struct smbios_entry));
- addr += sizeof(struct smbios_entry);
- addr = ALIGN(addr, 16);
- tables = addr;
- /* populate minimum required tables */
- for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) {
- const struct smbios_write_method *method;
- int tmp;
- method = &smbios_write_funcs[i];
- if (IS_ENABLED(CONFIG_OF_CONTROL) && method->subnode_name)
- ctx.node = ofnode_find_subnode(parent_node,
- method->subnode_name);
- tmp = method->write((ulong *)&addr, handle++, &ctx);
- max_struct_size = max(max_struct_size, tmp);
- len += tmp;
- }
- memcpy(se->anchor, "_SM_", 4);
- se->length = sizeof(struct smbios_entry);
- se->major_ver = SMBIOS_MAJOR_VER;
- se->minor_ver = SMBIOS_MINOR_VER;
- se->max_struct_size = max_struct_size;
- memcpy(se->intermediate_anchor, "_DMI_", 5);
- se->struct_table_length = len;
- /*
- * We must use a pointer here so things work correctly on sandbox. The
- * user of this table is not aware of the mapping of addresses to
- * sandbox's DRAM buffer.
- */
- table_addr = (ulong)map_sysmem(tables, 0);
- if (sizeof(table_addr) > sizeof(u32) && table_addr > (ulong)UINT_MAX) {
- /*
- * We need to put this >32-bit pointer into the table but the
- * field is only 32 bits wide.
- */
- printf("WARNING: SMBIOS table_address overflow %llx\n",
- (unsigned long long)table_addr);
- table_addr = 0;
- }
- se->struct_table_address = table_addr;
- se->struct_count = handle;
- /* calculate checksums */
- istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET;
- isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET;
- se->intermediate_checksum = table_compute_checksum(istart, isize);
- se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry));
- unmap_sysmem(se);
- return addr;
- }
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