Support a way to put SMBIOS properties in the device tree. These can be placed in a 'board' device in an 'smbios' subnode.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v5: - Fix "manufactuer" typo - Fix "Informaiton" typo
Changes in v4: - Fix build error with vexpress_ca9x4
Changes in v3: - Use a different binding with subnodes for each table type
lib/smbios.c | 98 +++++++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 81 insertions(+), 17 deletions(-)
diff --git a/lib/smbios.c b/lib/smbios.c index b0f5e936044..3f9d2ec0855 100644 --- a/lib/smbios.c +++ b/lib/smbios.c @@ -17,6 +17,18 @@ #include <dm/uclass-internal.h> #endif
+/** + * 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 * @@ -52,6 +64,43 @@ static int smbios_add_string(char *start, const char *str) } }
+/** + * smbios_add_prop_default() - Add a property from the device tree or default + * + * @start: string area start address + * @node: node containing the information to write (ofnode_null() if none) + * @prop: property to write + * @def: default string if the node has no such property + * @return 0 if not found, else SMBIOS string number (1 or more) + */ +static int smbios_add_prop_default(char *start, ofnode node, const char *prop, + const char *def) +{ + const char *str = NULL; + + if (IS_ENABLED(CONFIG_OF_CONTROL)) + str = ofnode_read_string(node, prop); + if (str) + return smbios_add_string(start, str); + else if (def) + return smbios_add_string(start, def); + + return 0; +} + +/** + * smbios_add_prop() - Add a property from the device tree + * + * @start: string area start address + * @node: node containing the information to write (ofnode_null() if none) + * @prop: property to write + * @return 0 if not found, else SMBIOS string number (1 or more) + */ +static int smbios_add_prop(char *start, ofnode node, const char *prop) +{ + return smbios_add_prop_default(start, node, prop, NULL); +} + /** * smbios_string_table_len() - compute the string area size * @@ -120,11 +169,15 @@ static int smbios_write_type1(ulong *current, int handle, ofnode node) t = map_sysmem(*current, len); memset(t, 0, sizeof(struct smbios_type1)); fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle); - t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER); - t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME); + t->manufacturer = smbios_add_prop_default(t->eos, node, "manufacturer", + CONFIG_SMBIOS_MANUFACTURER); + t->product_name = smbios_add_prop_default(t->eos, node, "product", + CONFIG_SMBIOS_PRODUCT_NAME); if (serial_str) { - strncpy((char *)t->uuid, serial_str, sizeof(t->uuid)); t->serial_number = smbios_add_string(t->eos, serial_str); + strncpy((char *)t->uuid, serial_str, sizeof(t->uuid)); + } else { + t->serial_number = smbios_add_prop(t->eos, node, "serial"); }
len = t->length + smbios_string_table_len(t->eos); @@ -142,8 +195,10 @@ static int smbios_write_type2(ulong *current, int handle, ofnode node) t = map_sysmem(*current, len); memset(t, 0, sizeof(struct smbios_type2)); fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle); - t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER); - t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME); + t->manufacturer = smbios_add_prop_default(t->eos, node, "manufacturer", + CONFIG_SMBIOS_MANUFACTURER); + t->product_name = smbios_add_prop_default(t->eos, node, "product", + CONFIG_SMBIOS_PRODUCT_NAME); t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING; t->board_type = SMBIOS_BOARD_MOTHERBOARD;
@@ -162,7 +217,8 @@ static int smbios_write_type3(ulong *current, int handle, ofnode node) t = map_sysmem(*current, len); memset(t, 0, sizeof(struct smbios_type3)); fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle); - t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER); + t->manufacturer = smbios_add_prop_default(t->eos, node, "manufacturer", + CONFIG_SMBIOS_MANUFACTURER); t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP; t->bootup_state = SMBIOS_STATE_SAFE; t->power_supply_state = SMBIOS_STATE_SAFE; @@ -262,19 +318,19 @@ static int smbios_write_type127(ulong *current, int handle, ofnode node) return len; }
-static smbios_write_type smbios_write_funcs[] = { - smbios_write_type0, - smbios_write_type1, - smbios_write_type2, - smbios_write_type3, - smbios_write_type4, - smbios_write_type32, - smbios_write_type127 +static struct smbios_write_method smbios_write_funcs[] = { + { smbios_write_type0, }, + { 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 node = ofnode_null(); + ofnode parent_node = ofnode_null(); struct smbios_entry *se; struct udevice *dev; ulong table_addr; @@ -289,7 +345,7 @@ ulong write_smbios_table(ulong addr) if (IS_ENABLED(CONFIG_OF_CONTROL)) { uclass_first_device(UCLASS_SYSINFO, &dev); if (dev) - node = dev_read_subnode(dev, "smbios"); + parent_node = dev_read_subnode(dev, "smbios"); }
/* 16 byte align the table address */ @@ -304,7 +360,15 @@ ulong write_smbios_table(ulong addr)
/* populate minimum required tables */ for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) { - int tmp = smbios_write_funcs[i]((ulong *)&addr, handle++, node); + const struct smbios_write_method *method; + ofnode node = ofnode_null(); + int tmp; + + method = &smbios_write_funcs[i]; + if (IS_ENABLED(CONFIG_OF_CONTROL) && method->subnode_name) + node = ofnode_find_subnode(parent_node, + method->subnode_name); + tmp = method->write((ulong *)&addr, handle++, node);
max_struct_size = max(max_struct_size, tmp); len += tmp;