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firmware: dmi_scan: add SBMIOS entry and DMI tables

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Some utils, like dmidecode and smbios, need to access SMBIOS entry
table area in order to get information like SMBIOS version, size, etc.
Currently it's done via /dev/mem. But for situation when /dev/mem
usage is disabled, the utils have to use dmi sysfs instead, which
doesn't represent SMBIOS entry and adds code/delay redundancy when direct
access for table is needed.

So this patch creates dmi/tables and adds SMBIOS entry point to allow
utils in question to work correctly without /dev/mem. Also patch adds
raw dmi table to simplify dmi table processing in user space, as
proposed by Jean Delvare.

Tested-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@globallogic.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
This commit is contained in:
Ivan Khoronzhuk 2015-06-25 09:06:56 +02:00 • committed by Jean Delvare
parent 6e0ad59e3d
commit d7f96f97c4
5 changed files with 111 additions and 9 deletions
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2
include/linux/dmi.h
View file

@ -2,6 +2,7 @@
#define __DMI_H__
#include <linux/list.h>
#include <linux/kobject.h>
#include <linux/mod_devicetable.h>
/* enum dmi_field is in mod_devicetable.h */
@ -93,6 +94,7 @@ struct dmi_dev_onboard {
int devfn;
};
extern struct kobject *dmi_kobj;
extern int dmi_check_system(const struct dmi_system_id *list);
const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list);
extern const char * dmi_get_system_info(int field);