[U-Boot] [PATCH 2/2] x86: Add SMBIOS table support
Bin Meng
bmeng.cn at gmail.com
Sat Oct 10 05:38:52 CEST 2015
Hi Simon,
On Fri, Oct 9, 2015 at 9:02 PM, Simon Glass <sjg at chromium.org> wrote:
> Hi Bin,
>
> On 9 October 2015 at 11:17, Bin Meng <bmeng.cn at gmail.com> wrote:
>> System Management BIOS (SMBIOS) is a specification for how
>> motherboard and system vendors present management information
>> about their products in a standard format by extending the BIOS
>> interface on Intel architecture systems. As of today the latest
>> spec is 3.0 and can be downloaded from DMTF website. This commit
>> adds a simple and minimum required implementation.
>>
>> Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
>> ---
>>
>> arch/x86/Kconfig | 11 ++
>> arch/x86/include/asm/smbios.h | 181 +++++++++++++++++++++++++++++++
>> arch/x86/lib/Makefile | 1 +
>> arch/x86/lib/smbios.c | 242 ++++++++++++++++++++++++++++++++++++++++++
>> arch/x86/lib/tables.c | 5 +
>> doc/README.x86 | 2 -
>> 6 files changed, 440 insertions(+), 2 deletions(-)
>> create mode 100644 arch/x86/include/asm/smbios.h
>> create mode 100644 arch/x86/lib/smbios.c
>
> Looks good - just a few style requests.
>
>>
>> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
>> index 5e42d7d..bf09b21 100644
>> --- a/arch/x86/Kconfig
>> +++ b/arch/x86/Kconfig
>> @@ -358,6 +358,17 @@ config GENERATE_ACPI_TABLE
>> by the operating system. It defines platform-independent interfaces
>> for configuration and power management monitoring.
>>
>> +config GENERATE_SMBIOS_TABLE
>> + bool "Generate an SMBIOS (System Management BIOS) table"
>> + default y
>> + help
>> + The System Management BIOS (SMBIOS) specification addresses how
>> + motherboard and system vendors present management information about
>> + their products in a standard format by extending the BIOS interface
>> + on Intel architecture systems.
>> +
>> + Check http://www.dmtf.org/standards/smbios for details.
>> +
>> endmenu
>>
>> config MAX_PIRQ_LINKS
>> diff --git a/arch/x86/include/asm/smbios.h b/arch/x86/include/asm/smbios.h
>> new file mode 100644
>> index 0000000..1fa7d74
>> --- /dev/null
>> +++ b/arch/x86/include/asm/smbios.h
>> @@ -0,0 +1,181 @@
>> +/*
>> + * Copyright (C) 2015, Bin Meng <bmeng.cn at gmail.com>
>> + *
>> + * Adapted from coreboot src/include/smbios.h
>> + *
>> + * SPDX-License-Identifier: GPL-2.0+
>> + */
>> +
>> +#ifndef _SMBIOS_H_
>> +#define _SMBIOS_H_
>> +
>> +/* SMBIOS spec version implemented */
>> +#define SMBIOS_MAJOR_VER 3
>> +#define SMBIOS_MINOR_VER 0
>> +
>> +/* SMBIOS structure types */
>> +enum {
>> + SMBIOS_BIOS_INFORMATION = 0,
>> + SMBIOS_SYSTEM_INFORMATION = 1,
>> + SMBIOS_SYSTEM_ENCLOSURE = 3,
>> + SMBIOS_PROCESSOR_INFORMATION = 4,
>> + SMBIOS_CACHE_INFORMATION = 7,
>> + SMBIOS_SYSTEM_SLOTS = 9,
>> + SMBIOS_PHYS_MEMORY_ARRAY = 16,
>> + SMBIOS_MEMORY_DEVICE = 17,
>> + SMBIOS_MEMORY_ARRAY_MAPPED_ADDRESS = 19,
>> + SMBIOS_SYSTEM_BOOT_INFORMATION = 32,
>> + SMBIOS_END_OF_TABLE = 127
>> +};
>> +
>> +#define SMBIOS_INTERMEDIATE_OFFSET 16
>> +#define SMBIOS_STRUCT_EOS_BYTES 2
>> +
>> +struct __packed smbios_entry {
>> + u8 anchor[4];
>> + u8 checksum;
>> + u8 length;
>> + u8 major_ver;
>> + u8 minor_ver;
>> + u16 max_struct_size;
>> + u8 entry_point_rev;
>> + u8 formatted_area[5];
>> + u8 intermediate_anchor[5];
>> + u8 intermediate_checksum;
>> + u16 struct_table_length;
>> + u32 struct_table_address;
>> + u16 struct_count;
>> + u8 bcd_rev;
>> +};
>> +
>> +/* BIOS characteristics */
>> +#define BIOS_CHARACTERISTICS_PCI_SUPPORTED (1 << 7)
>> +#define BIOS_CHARACTERISTICS_UPGRADEABLE (1 << 11)
>> +#define BIOS_CHARACTERISTICS_SELECTABLE_BOOT (1 << 16)
>> +
>> +#define BIOS_CHARACTERISTICS_EXT1_ACPI (1 << 0)
>> +#define BIOS_CHARACTERISTICS_EXT2_TARGET (1 << 2)
>> +
>> +struct __packed smbios_type0 {
>> + u8 type;
>> + u8 length;
>> + u16 handle;
>> + u8 vendor;
>> + u8 bios_ver;
>> + u16 bios_start_segment;
>> + u8 bios_release_date;
>> + u8 bios_rom_size;
>> + u64 bios_characteristics;
>> + u8 bios_characteristics_ext1;
>> + u8 bios_characteristics_ext2;
>> + u8 bios_major_release;
>> + u8 bios_minor_release;
>> + u8 ec_major_release;
>> + u8 ec_minor_release;
>> + char eos[SMBIOS_STRUCT_EOS_BYTES];
>> +};
>> +
>> +struct __packed smbios_type1 {
>> + u8 type;
>> + u8 length;
>> + u16 handle;
>> + u8 manufacturer;
>> + u8 product_name;
>> + u8 version;
>> + u8 serial_number;
>> + u8 uuid[16];
>> + u8 wakeup_type;
>> + u8 sku_number;
>> + u8 family;
>> + char eos[SMBIOS_STRUCT_EOS_BYTES];
>> +};
>> +
>> +#define SMBIOS_ENCLOSURE_DESKTOP 3
>> +#define SMBIOS_STATE_SAFE 3
>> +#define SMBIOS_SECURITY_NONE 3
>> +
>> +struct __packed smbios_type3 {
>> + u8 type;
>> + u8 length;
>> + u16 handle;
>> + u8 manufacturer;
>> + u8 chassis_type;
>> + u8 version;
>> + u8 serial_number;
>> + u8 asset_tag_number;
>> + u8 bootup_state;
>> + u8 power_supply_state;
>> + u8 thermal_state;
>> + u8 security_status;
>> + u32 oem_defined;
>> + u8 height;
>> + u8 number_of_power_cords;
>> + u8 element_count;
>> + u8 element_record_length;
>> + char eos[SMBIOS_STRUCT_EOS_BYTES];
>> +};
>> +
>> +#define SMBIOS_PROCESSOR_TYPE_CENTRAL 3
>> +#define SMBIOS_PROCESSOR_STATUS_ENABLED 1
>> +#define SMBIOS_PROCESSOR_UPGRADE_NONE 6
>> +
>> +struct __packed smbios_type4 {
>> + u8 type;
>> + u8 length;
>> + u16 handle;
>> + u8 socket_designation;
>> + u8 processor_type;
>> + u8 processor_family;
>> + u8 processor_manufacturer;
>> + u32 processor_id[2];
>> + u8 processor_version;
>> + u8 voltage;
>> + u16 external_clock;
>> + u16 max_speed;
>> + u16 current_speed;
>> + u8 status;
>> + u8 processor_upgrade;
>> + u16 l1_cache_handle;
>> + u16 l2_cache_handle;
>> + u16 l3_cache_handle;
>> + u8 serial_number;
>> + u8 asset_tag;
>> + u8 part_number;
>> + u8 core_count;
>> + u8 core_enabled;
>> + u8 thread_count;
>> + u16 processor_characteristics;
>> + u16 processor_family2;
>> + u16 core_count2;
>> + u16 core_enabled2;
>> + u16 thread_count2;
>> + char eos[SMBIOS_STRUCT_EOS_BYTES];
>> +};
>> +
>> +struct __packed smbios_type32 {
>> + u8 type;
>> + u8 length;
>> + u16 handle;
>> + u8 reserved[6];
>> + u8 boot_status;
>> + u8 eos[SMBIOS_STRUCT_EOS_BYTES];
>> +};
>> +
>> +struct __packed smbios_type127 {
>> + u8 type;
>> + u8 length;
>> + u16 handle;
>> + u8 eos[SMBIOS_STRUCT_EOS_BYTES];
>> +};
>> +
>> +/**
>> + * write_smbios_table() - Write SMBIOS table
>> + *
>> + * This writes SMBIOS table at a given address.
>> + *
>> + * @addr: start address to write SMBIOS table
>> + * @return: end address of SMBIOS table
>> + */
>> +u32 write_smbios_table(u32 addr);
>> +
>> +#endif /* _SMBIOS_H_ */
>> diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
>> index 169062e..4ac9956 100644
>> --- a/arch/x86/lib/Makefile
>> +++ b/arch/x86/lib/Makefile
>> @@ -30,6 +30,7 @@ obj-y += relocate.o
>> obj-y += physmem.o
>> obj-$(CONFIG_X86_RAMTEST) += ramtest.o
>> obj-y += sfi.o
>> +obj-$(CONFIG_GENERATE_SMBIOS_TABLE) += smbios.o
>> obj-y += string.o
>> obj-$(CONFIG_GENERATE_ACPI_TABLE) += acpi_table.o
>> obj-y += tables.o
>> diff --git a/arch/x86/lib/smbios.c b/arch/x86/lib/smbios.c
>> new file mode 100644
>> index 0000000..2cb2d0c
>> --- /dev/null
>> +++ b/arch/x86/lib/smbios.c
>> @@ -0,0 +1,242 @@
>> +/*
>> + * Copyright (C) 2015, Bin Meng <bmeng.cn at gmail.com>
>> + *
>> + * Adapted from coreboot src/arch/x86/smbios.c
>> + *
>> + * SPDX-License-Identifier: GPL-2.0+
>> + */
>> +
>> +#include <common.h>
>> +#include <version.h>
>> +#include <asm/cpu.h>
>> +#include <asm/smbios.h>
>> +#include <asm/tables.h>
>> +
>> +DECLARE_GLOBAL_DATA_PTR;
>> +
>> +static int smbios_add_string(char *start, const char *str)
>
> Can you please add a comment about what this function does, args and
> @return? It seems really bizarre.
>
Sure.
>> +{
>> + int i = 1;
>> + char *p = start;
>> +
>> + for (;;) {
>> + if (!*p) {
>> + strcpy(p, str);
>> + p += strlen(str);
>> + *p++ = '\0';
>> + *p++ = '\0';
>> +
>> + return i;
>> + }
>> +
>> + if (!strcmp(p, str))
>> + return i;
>> +
>> + p += strlen(p) + 1;
>> + i++;
>> + }
>> +}
>> +
>> +static int smbios_string_table_len(char *start)
>> +{
>> + char *p = start;
>> + int i, len = 0;
>> +
>> + while (*p) {
>> + i = strlen(p) + 1;
>> + p += i;
>> + len += i;
>> + }
>> +
>> + return len + 1;
>> +}
>> +
>> +static int smbios_write_type0(u32 *current, int handle)
>> +{
>> + struct smbios_type0 *t = (struct smbios_type0 *)*current;
>> + int len = sizeof(struct smbios_type0);
>> +
>> + memset(t, 0, sizeof(struct smbios_type0));
>> + t->type = SMBIOS_BIOS_INFORMATION;
>> + t->length = len - SMBIOS_STRUCT_EOS_BYTES;
>> + t->handle = handle;
>> + t->vendor = smbios_add_string(t->eos, "U-Boot");
>> + t->bios_ver = smbios_add_string(t->eos, PLAIN_VERSION);
>> + t->bios_release_date = smbios_add_string(t->eos, U_BOOT_DMI_DATE);
>> + t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
>> + 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
>> + t->bios_characteristics_ext2 = BIOS_CHARACTERISTICS_EXT2_TARGET;
>> + t->bios_major_release = 0xff;
>> + t->bios_minor_release = 0xff;
>> + t->ec_major_release = 0xff;
>> + t->ec_minor_release = 0xff;
>> +
>> + len = t->length + smbios_string_table_len(t->eos);
>> + *current += len;
>> +
>> + return len;
>> +}
>> +
>> +static int smbios_write_type1(u32 *current, int handle)
>> +{
>> + struct smbios_type1 *t = (struct smbios_type1 *)*current;
>> + int len = sizeof(struct smbios_type1);
>> +
>> + memset(t, 0, sizeof(struct smbios_type1));
>> + t->type = SMBIOS_SYSTEM_INFORMATION;
>> + t->length = len - SMBIOS_STRUCT_EOS_BYTES;
>> + t->handle = handle;
>
> Can we have a common function that sets up this header given the
> length? This code seems the same in each function.
Sure.
>
>> + t->manufacturer = smbios_add_string(t->eos, CONFIG_SYS_VENDOR);
>> + t->product_name = smbios_add_string(t->eos, CONFIG_SYS_BOARD);
>> +
>> + len = t->length + smbios_string_table_len(t->eos);
>> + *current += len;
>> +
>> + return len;
>> +}
>> +
>> +static int smbios_write_type3(u32 *current, int handle)
>> +{
>> + struct smbios_type3 *t = (struct smbios_type3 *)*current;
>> + int len = sizeof(struct smbios_type3);
>> +
>> + memset(t, 0, sizeof(struct smbios_type3));
>> + t->type = SMBIOS_SYSTEM_ENCLOSURE;
>> + t->length = len - SMBIOS_STRUCT_EOS_BYTES;
>> + t->handle = handle;
>> + t->manufacturer = smbios_add_string(t->eos, CONFIG_SYS_VENDOR);
>> + 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(t->eos);
>> + *current += len;
>> +
>> + return len;
>> +}
>> +
>> +static int smbios_write_type4(u32 *current, int handle)
>> +{
>> + struct smbios_type4 *t = (struct smbios_type4 *)*current;
>> + int len = sizeof(struct smbios_type4);
>> + const char *vendor;
>> + char *name;
>> + char processor_name[CPU_MAX_NAME_LEN];
>> + struct cpuid_result res;
>> +
>> + memset(t, 0, sizeof(struct smbios_type4));
>> + t->type = SMBIOS_PROCESSOR_INFORMATION;
>> + t->length = len - SMBIOS_STRUCT_EOS_BYTES;
>> + t->handle = handle;
>> + t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
>> + t->processor_family = gd->arch.x86;
>> + vendor = cpu_vendor_name(gd->arch.x86_vendor);
>> + t->processor_manufacturer = smbios_add_string(t->eos, vendor);
>> + res = cpuid(1);
>> + t->processor_id[0] = res.eax;
>> + t->processor_id[1] = res.edx;
>> + name = cpu_get_name(processor_name);
>> + t->processor_version = smbios_add_string(t->eos, name);
>> + 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(t->eos);
>> + *current += len;
>> +
>> + return len;
>> +}
>> +
>> +static int smbios_write_type32(u32 *current, int handle)
>> +{
>> + struct smbios_type32 *t = (struct smbios_type32 *)*current;
>> + int len = sizeof(struct smbios_type32);
>> +
>> + memset(t, 0, sizeof(struct smbios_type32));
>> + t->type = SMBIOS_SYSTEM_BOOT_INFORMATION;
>> + t->length = len - SMBIOS_STRUCT_EOS_BYTES;
>> + t->handle = handle;
>> +
>> + *current += len;
>> +
>> + return len;
>> +}
>> +
>> +static int smbios_write_type127(u32 *current, int handle)
>> +{
>> + struct smbios_type127 *t = (struct smbios_type127 *)*current;
>> + int len = sizeof(struct smbios_type127);
>> +
>> + memset(t, 0, sizeof(struct smbios_type127));
>> + t->type = SMBIOS_END_OF_TABLE;
>> + t->length = len - SMBIOS_STRUCT_EOS_BYTES;
>> + t->handle = handle;
>> +
>> + *current += len;
>> +
>> + return len;
>> +}
>> +
>> +#define update_max(len, max_len, stmt) \
>> + do { \
>> + int tmp = stmt; \
>> + max_len = max(max_len, tmp); \
>> + len += tmp; \
>> + } while (0)
>> +
>> +u32 write_smbios_table(u32 addr)
>> +{
>> + struct smbios_entry *se;
>> + u32 tables;
>> + int len = 0;
>> + int max_struct_size = 0;
>> + int handle = 0;
>> + char *istart;
>> + int isize;
>> +
>> + /* 16 byte align the table address */
>> + addr = ALIGN(addr, 16);
>> +
>> + se = (struct smbios_entry *)addr;
>> + memset(se, 0, sizeof(struct smbios_entry));
>> +
>> + addr += sizeof(struct smbios_entry);
>> + addr = ALIGN(addr, 16);
>> + tables = addr;
>> +
>> + /* populate minimum required tables */
>> + update_max(len, max_struct_size, smbios_write_type0(&addr, handle++));
>> + update_max(len, max_struct_size, smbios_write_type1(&addr, handle++));
>> + update_max(len, max_struct_size, smbios_write_type3(&addr, handle++));
>> + update_max(len, max_struct_size, smbios_write_type4(&addr, handle++));
>> + update_max(len, max_struct_size, smbios_write_type32(&addr, handle++));
>> + update_max(len, max_struct_size, smbios_write_type127(&addr, handle++));
>
> I'm not keen on this #define approach. Perhaps this would be better as
> a table of functions to call, and a loop that calls them in turn,
> updating 'max_struct_size'?
>
I will have a try.
>> +
>> + 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;
>> + se->struct_table_address = tables;
>> + 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));
>> +
>> + return addr;
>> +}
>> diff --git a/arch/x86/lib/tables.c b/arch/x86/lib/tables.c
>> index f15b2e2..14b15cf 100644
>> --- a/arch/x86/lib/tables.c
>> +++ b/arch/x86/lib/tables.c
>> @@ -7,6 +7,7 @@
>> #include <common.h>
>> #include <asm/sfi.h>
>> #include <asm/mpspec.h>
>> +#include <asm/smbios.h>
>> #include <asm/tables.h>
>> #include <asm/acpi_table.h>
>>
>> @@ -56,4 +57,8 @@ void write_tables(void)
>> rom_table_end = write_acpi_tables(rom_table_end);
>> rom_table_end = ALIGN(rom_table_end, 1024);
>> #endif
>> +#ifdef CONFIG_GENERATE_SMBIOS_TABLE
>> + rom_table_end = write_smbios_table(rom_table_end);
>> + rom_table_end = ALIGN(rom_table_end, 1024);
>> +#endif
>> }
>> diff --git a/doc/README.x86 b/doc/README.x86
>> index a4f5321..18fed82 100644
>> --- a/doc/README.x86
>> +++ b/doc/README.x86
>> @@ -764,7 +764,6 @@ TODO List
>> - Audio
>> - Chrome OS verified boot
>> - SMI and ACPI support, to provide platform info and facilities to Linux
>> -- Desktop Management Interface (DMI) [15] support
>>
>> References
>> ----------
>> @@ -782,4 +781,3 @@ References
>> [12] http://events.linuxfoundation.org/sites/events/files/slides/chromeos_and_diy_vboot_0.pdf
>> [13] http://events.linuxfoundation.org/sites/events/files/slides/elce-2014.pdf
>> [14] doc/device-tree-bindings/misc/intel,irq-router.txt
>> -[15] http://en.wikipedia.org/wiki/Desktop_Management_Interface
>> --
>> 1.8.2.1
>>
>
> It might be worth adding docs to the README about what tables U-Boot
> now supports, how to enable each and what is recommended. There are
> quite a few now. My head is spinning!
>
Do you mean what tables in SMBIOS spec are supported by U-Boot, or
what tables in PIRQ/MP/ACPI/SMBIOS tables are supported by U-Boot?
Regards,
Bin
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