[PATCH v3 05/10] smbios: Refactor smbios library
Raymond Mao
raymond.mao at linaro.org
Fri Dec 6 23:54:22 CET 2024
Current smbios library does not fully match to the specification.
It hardcodes values instead of exposing values from the device.
It does not reserve the space to support dynamic length for
contained object handles or elements and misses the handling of
a few of fields.
The refactoring of this patch includes:
1. Expose values from device via sysinfo interface.
2. Replace smbios_add_prop with smbios_add_prop_si to allow getting
string values from sysinfo.
3. Add smbios_get_val_si to get values from sysinfo or device tree.
4. Use sysinfo_get_data to get data area.
5. Reserve the space of contained object handles and elements.
6. Miscellaneous fixes in smbios.
Signed-off-by: Raymond Mao <raymond.mao at linaro.org>
---
Changes in v2
- Combine with #7(v1) patch.
- Move the changes of cmd/smbios.c to a separated patch.
- Refactor smbios_get_val_si to get values from dt when values are
not available from sysinfo driver.
- Miscellaneous refactoring.
Changes in v3
- Allows smbios_get_val_si to fallback to the values from device tree.
- Add GENERATE_SMBIOS_TABLE_VERBOSE for the detail information.
- Rebased on the changes of SYSID_
- Split the changes for detailed information of Type 3, 4 and 7 to patch #06.
include/smbios.h | 14 +++-
lib/Kconfig | 6 ++
lib/smbios.c | 202 ++++++++++++++++++++++++++++++++++++-----------
3 files changed, 176 insertions(+), 46 deletions(-)
diff --git a/include/smbios.h b/include/smbios.h
index cb4b3e08b3a..18f568f9b0d 100644
--- a/include/smbios.h
+++ b/include/smbios.h
@@ -122,6 +122,8 @@ struct __packed smbios_type1 {
char eos[SMBIOS_STRUCT_EOS_BYTES];
};
+#define SMBIOS_TYPE2_CON_OBJ_HANDLE_SIZE sizeof(u16)
+
struct __packed smbios_type2 {
struct smbios_header hdr;
u8 manufacturer;
@@ -134,6 +136,10 @@ struct __packed smbios_type2 {
u16 chassis_handle;
u8 board_type;
u8 number_contained_objects;
+ /*
+ * Dynamic bytes will be inserted here to store the objects.
+ * length is equal to 'number_contained_objects'.
+ */
char eos[SMBIOS_STRUCT_EOS_BYTES];
};
@@ -153,12 +159,17 @@ struct __packed smbios_type3 {
u8 number_of_power_cords;
u8 element_count;
u8 element_record_length;
+ /*
+ * Dynamic bytes will be inserted here to store the elements.
+ * length is equal to 'element_record_length' * 'element_record_length'
+ */
+ u8 sku_number;
char eos[SMBIOS_STRUCT_EOS_BYTES];
};
struct __packed smbios_type4 {
struct smbios_header hdr;
- u8 socket_designation;
+ u8 socket_design;
u8 processor_type;
u8 processor_family;
u8 processor_manufacturer;
@@ -184,6 +195,7 @@ struct __packed smbios_type4 {
u16 core_count2;
u16 core_enabled2;
u16 thread_count2;
+ u16 thread_enabled;
char eos[SMBIOS_STRUCT_EOS_BYTES];
};
diff --git a/lib/Kconfig b/lib/Kconfig
index 0b089814d14..7ac58125f94 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -1038,6 +1038,12 @@ config GENERATE_SMBIOS_TABLE
See also SYSINFO_SMBIOS which allows SMBIOS values to be provided in
the devicetree.
+config GENERATE_SMBIOS_TABLE_VERBOSE
+ bool "Generate a verbose SMBIOS (System Management BIOS) table"
+ depends on GENERATE_SMBIOS_TABLE
+ help
+ Provide verbose SMBIOS information.
+
endmenu
config LIB_RATIONAL
diff --git a/lib/smbios.c b/lib/smbios.c
index 1dd564a1762..e8089e91523 100644
--- a/lib/smbios.c
+++ b/lib/smbios.c
@@ -206,6 +206,43 @@ void get_str_from_dt(const struct map_sysinfo *nprop, char *str, size_t size)
}
}
+/**
+ * smbios_get_val_si() - Get value from the devicetree or sysinfo
+ *
+ * @ctx: context of SMBIOS
+ * @prop: property to read
+ * @sysinfo_id: unique identifier for the value to be read
+ * @val_def: Default value
+ * Return: Valid value from sysinfo or device tree, otherwise val_def.
+ */
+static int smbios_get_val_si(struct smbios_ctx * __maybe_unused ctx,
+ const char * __maybe_unused prop,
+ int __maybe_unused sysinfo_id, int val_def)
+{
+#if IS_ENABLED(CONFIG_GENERATE_SMBIOS_TABLE_VERBOSE)
+ int val;
+
+ if (!ctx->dev)
+ return val_def;
+
+ if (!sysinfo_get_int(ctx->dev, sysinfo_id, &val))
+ return val;
+
+ if (!IS_ENABLED(CONFIG_OF_CONTROL) || !prop)
+ return val_def;
+
+ if (ofnode_valid(ctx->node) && !ofnode_read_u32(ctx->node, prop, &val))
+ return val;
+
+ /*
+ * If the node or property is not valid fallback and try the root
+ */
+ if (!ofnode_read_u32(ofnode_root(), prop, &val))
+ return val;
+#endif
+ return val_def;
+}
+
/**
* smbios_add_prop_si() - Add a property from the devicetree or sysinfo
*
@@ -225,9 +262,6 @@ static int smbios_add_prop_si(struct smbios_ctx *ctx, const char *prop,
if (!dval || !*dval)
dval = NULL;
- if (!prop)
- return smbios_add_string(ctx, dval);
-
if (sysinfo_id && ctx->dev) {
char val[SMBIOS_STR_MAX];
@@ -235,6 +269,9 @@ static int smbios_add_prop_si(struct smbios_ctx *ctx, const char *prop,
if (!ret)
return smbios_add_string(ctx, val);
}
+ if (!prop)
+ return smbios_add_string(ctx, dval);
+
if (IS_ENABLED(CONFIG_OF_CONTROL)) {
const char *str = NULL;
char str_dt[128] = { 0 };
@@ -336,9 +373,11 @@ static int smbios_write_type0(ulong *current, int handle,
memset(t, 0, len);
fill_smbios_header(t, SMBIOS_BIOS_INFORMATION, len, handle);
smbios_set_eos(ctx, t->eos);
- t->vendor = smbios_add_prop(ctx, NULL, "U-Boot");
+ t->vendor = smbios_add_prop_si(ctx, NULL, SYSID_SM_BIOS_VENDOR,
+ "U-Boot");
- t->bios_ver = smbios_add_prop(ctx, "version", PLAIN_VERSION);
+ t->bios_ver = smbios_add_prop_si(ctx, "version", SYSID_SM_BIOS_VER,
+ PLAIN_VERSION);
if (t->bios_ver)
gd->smbios_version = ctx->last_str;
log_debug("smbios_version = %p: '%s'\n", gd->smbios_version,
@@ -347,7 +386,9 @@ static int smbios_write_type0(ulong *current, int handle,
print_buffer((ulong)gd->smbios_version, gd->smbios_version,
1, strlen(gd->smbios_version) + 1, 0);
#endif
- t->bios_release_date = smbios_add_prop(ctx, NULL, U_BOOT_DMI_DATE);
+ t->bios_release_date = smbios_add_prop_si(ctx, NULL,
+ SYSID_SM_BIOS_REL_DATE,
+ U_BOOT_DMI_DATE);
#ifdef CONFIG_ROM_SIZE
if (CONFIG_ROM_SIZE < SZ_16M) {
t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
@@ -392,14 +433,13 @@ static int smbios_write_type1(ulong *current, int handle,
memset(t, 0, len);
fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle);
smbios_set_eos(ctx, t->eos);
+
t->manufacturer = smbios_add_prop_si(ctx, "manufacturer",
SYSID_SM_SYSTEM_MANUFACTURER,
NULL);
t->product_name = smbios_add_prop_si(ctx, "product",
- SYSID_SM_SYSTEM_PRODUCT,
- NULL);
- t->version = smbios_add_prop_si(ctx, "version",
- SYSID_SM_SYSTEM_VERSION,
+ SYSID_SM_SYSTEM_PRODUCT, NULL);
+ t->version = smbios_add_prop_si(ctx, "version", SYSID_SM_SYSTEM_VERSION,
NULL);
if (serial_str) {
t->serial_number = smbios_add_prop(ctx, NULL, serial_str);
@@ -409,11 +449,13 @@ static int smbios_write_type1(ulong *current, int handle,
SYSID_SM_SYSTEM_SERIAL,
NULL);
}
- t->wakeup_type = SMBIOS_WAKEUP_TYPE_UNKNOWN;
- t->sku_number = smbios_add_prop_si(ctx, "sku",
- SYSID_SM_SYSTEM_SKU, NULL);
- t->family = smbios_add_prop_si(ctx, "family",
- SYSID_SM_SYSTEM_FAMILY, NULL);
+ t->wakeup_type = smbios_get_val_si(ctx, "wakeup-type",
+ SYSID_SM_SYSTEM_WAKEUP,
+ SMBIOS_WAKEUP_TYPE_UNKNOWN);
+ t->sku_number = smbios_add_prop_si(ctx, "sku", SYSID_SM_SYSTEM_SKU,
+ NULL);
+ t->family = smbios_add_prop_si(ctx, "family", SYSID_SM_SYSTEM_FAMILY,
+ NULL);
len = t->hdr.length + smbios_string_table_len(ctx);
*current += len;
@@ -427,29 +469,49 @@ static int smbios_write_type2(ulong *current, int handle,
{
struct smbios_type2 *t;
int len = sizeof(*t);
+ u8 *eos_addr;
+ /*
+ * reserve the space for the dynamic bytes of contained object handles.
+ * TODO: len += <obj_handle_num> * SMBIOS_TYPE2_CON_OBJ_HANDLE_SIZE
+ * obj_handle_num can be from DT node "baseboard" or sysinfo driver.
+ */
t = map_sysmem(*current, len);
memset(t, 0, len);
fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle);
- smbios_set_eos(ctx, t->eos);
+
+ /* eos is at the end of the structure */
+ eos_addr = (u8 *)t + len - sizeof(t->eos);
+ smbios_set_eos(ctx, eos_addr);
+
t->manufacturer = smbios_add_prop_si(ctx, "manufacturer",
SYSID_SM_BASEBOARD_MANUFACTURER,
NULL);
t->product_name = smbios_add_prop_si(ctx, "product",
- SYSID_SM_BASEBOARD_PRODUCT,
- NULL);
+ SYSID_SM_BASEBOARD_PRODUCT, NULL);
t->version = smbios_add_prop_si(ctx, "version",
- SYSID_SM_BASEBOARD_VERSION,
- NULL);
-
+ SYSID_SM_BASEBOARD_VERSION, NULL);
t->serial_number = smbios_add_prop_si(ctx, "serial",
- SYSID_SM_BASEBOARD_SERIAL,
- NULL);
+ SYSID_SM_BASEBOARD_SERIAL, NULL);
t->asset_tag_number = smbios_add_prop_si(ctx, "asset-tag",
SYSID_SM_BASEBOARD_ASSET_TAG,
NULL);
- t->feature_flags = SMBIOS_BOARD_FEAT_HOST_BOARD;
- t->board_type = SMBIOS_BOARD_TYPE_MOTHERBOARD;
+ t->feature_flags = smbios_get_val_si(ctx, "feature-flags",
+ SYSID_SM_BASEBOARD_FEATURE, 0);
+
+ t->chassis_location =
+ smbios_add_prop_si(ctx, "chassis-location",
+ SYSID_SM_BASEBOARD_CHASSIS_LOCAT, NULL);
+ t->board_type = smbios_get_val_si(ctx, "board-type",
+ SYSID_SM_BASEBOARD_TYPE,
+ SMBIOS_BOARD_TYPE_UNKNOWN);
+
+ /*
+ * TODO:
+ * Populate the Contained Object Handles if they exist
+ * t->number_contained_objects = <obj_handle_num>;
+ */
+
t->chassis_handle = handle + 1;
len = t->hdr.length + smbios_string_table_len(ctx);
@@ -464,17 +526,43 @@ static int smbios_write_type3(ulong *current, int handle,
{
struct smbios_type3 *t;
int len = sizeof(*t);
+ u8 *eos_addr;
+ size_t elem_size = 0;
+
+ /*
+ * reserve the space for the dynamic bytes of contained elements.
+ * TODO: elem_size = <element_count> * <element_record_length>
+ * element_count and element_record_length can be from DT node
+ * "chassis" or sysinfo driver.
+ */
+ len += elem_size;
t = map_sysmem(*current, len);
memset(t, 0, len);
fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle);
- smbios_set_eos(ctx, t->eos);
- t->manufacturer = smbios_add_prop(ctx, "manufacturer", NULL);
- 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;
+
+ /* eos is at the end of the structure */
+ eos_addr = (u8 *)t + len - sizeof(t->eos);
+ smbios_set_eos(ctx, eos_addr);
+
+ t->manufacturer = smbios_add_prop_si(ctx, "manufacturer",
+ SYSID_SM_ENCLOSURE_MANUFACTURER,
+ NULL);
+ t->chassis_type = smbios_get_val_si(ctx, "chassis-type",
+ SYSID_SM_ENCLOSURE_TYPE,
+ SMBIOS_ENCLOSURE_UNKNOWN);
+ t->bootup_state = smbios_get_val_si(ctx, "bootup-state",
+ SYSID_SM_ENCLOSURE_BOOTUP,
+ SMBIOS_STATE_UNKNOWN);
+ t->power_supply_state = smbios_get_val_si(ctx, "power-supply-state",
+ SYSID_SM_ENCLOSURE_POW,
+ SMBIOS_STATE_UNKNOWN);
+ t->thermal_state = smbios_get_val_si(ctx, "thermal-state",
+ SYSID_SM_ENCLOSURE_THERMAL,
+ SMBIOS_STATE_UNKNOWN);
+ t->security_status = smbios_get_val_si(ctx, "security-status",
+ SYSID_SM_ENCLOSURE_SECURITY,
+ SMBIOS_SECURITY_UNKNOWN);
len = t->hdr.length + smbios_string_table_len(ctx);
*current += len;
@@ -510,11 +598,25 @@ static void smbios_write_type4_dm(struct smbios_type4 *t,
name = processor_name;
}
#endif
-
- t->processor_family = 0xfe;
- t->processor_family2 = processor_family;
- t->processor_manufacturer = smbios_add_prop(ctx, NULL, vendor);
- t->processor_version = smbios_add_prop(ctx, NULL, name);
+ if (processor_family == SMBIOS_PROCESSOR_FAMILY_UNKNOWN)
+ processor_family =
+ smbios_get_val_si(ctx, "family",
+ SYSID_SM_PROCESSOR_FAMILY,
+ SMBIOS_PROCESSOR_FAMILY_UNKNOWN);
+
+ if (processor_family == SMBIOS_PROCESSOR_FAMILY_EXT)
+ t->processor_family2 =
+ smbios_get_val_si(ctx, "family2",
+ SYSID_SM_PROCESSOR_FAMILY2,
+ SMBIOS_PROCESSOR_FAMILY_UNKNOWN);
+
+ t->processor_family = processor_family;
+ t->processor_manufacturer =
+ smbios_add_prop_si(ctx, "manufacturer",
+ SYSID_SM_PROCESSOR_MANUFACT, vendor);
+ t->processor_version = smbios_add_prop_si(ctx, "version",
+ SYSID_SM_PROCESSOR_VERSION,
+ name);
}
static int smbios_write_type4(ulong *current, int handle,
@@ -527,13 +629,23 @@ static int smbios_write_type4(ulong *current, int handle,
memset(t, 0, len);
fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle);
smbios_set_eos(ctx, t->eos);
- t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
+ t->socket_design = smbios_add_prop_si(ctx, "socket-design",
+ SYSID_SM_PROCESSOR_SOCKET, NULL);
+ t->processor_type = smbios_get_val_si(ctx, "processor-type",
+ SYSID_SM_PROCESSOR_TYPE,
+ SMBIOS_PROCESSOR_TYPE_UNKNOWN);
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->status = smbios_get_val_si(ctx, "processor-status",
+ SYSID_SM_PROCESSOR_STATUS,
+ SMBIOS_PROCESSOR_STATUS_UNKNOWN);
+ t->processor_upgrade =
+ smbios_get_val_si(ctx, "upgrade", SYSID_SM_PROCESSOR_UPGRADE,
+ SMBIOS_PROCESSOR_UPGRADE_UNKNOWN);
+
+ t->l1_cache_handle = SMBIOS_CACHE_HANDLE_NONE;
+ t->l2_cache_handle = SMBIOS_CACHE_HANDLE_NONE;
+ t->l3_cache_handle = SMBIOS_CACHE_HANDLE_NONE;
len = t->hdr.length + smbios_string_table_len(ctx);
*current += len;
@@ -581,7 +693,7 @@ static struct smbios_write_method smbios_write_funcs[] = {
{ smbios_write_type2, "baseboard", },
/* Type 3 must immediately follow type 2 due to chassis handle. */
{ smbios_write_type3, "chassis", },
- { smbios_write_type4, },
+ { smbios_write_type4, "processor"},
{ smbios_write_type32, },
{ smbios_write_type127 },
};
@@ -598,7 +710,7 @@ ulong write_smbios_table(ulong addr)
int i;
ctx.node = ofnode_null();
- if (IS_ENABLED(CONFIG_OF_CONTROL) && CONFIG_IS_ENABLED(SYSINFO)) {
+ if (CONFIG_IS_ENABLED(SYSINFO)) {
uclass_first_device(UCLASS_SYSINFO, &ctx.dev);
if (ctx.dev) {
int ret;
--
2.25.1
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