Commit f5152f4d authored by Erwan Velu's avatar Erwan Velu Committed by Jean Delvare
Browse files

firmware/dmi: Report DMI Bios & EC firmware release 



Some vendors like HPe or Dell, encode the release version of their BIOS
in the "System BIOS {Major|Minor} Release" fields of Type 0.

This information is used to know which bios release actually runs.
It could be used for some quirks, debugging sessions or inventory tasks.

A typical output for a Dell system running the 65.27 bios is :
	[root@t1700 ~]# cat /sys/devices/virtual/dmi/id/bios_release
	65.27
	[root@t1700 ~]#

Servers that have a BMC encode the release version of their firmware in the
 "Embedded Controller Firmware {Major|Minor} Release" fields of Type 0.

This information is used to know which BMC release actually runs.
It could be used for some quirks, debugging sessions or inventory tasks.

A typical output for a Dell system running the 3.75 bmc release is :
    [root@t1700 ~]# cat /sys/devices/virtual/dmi/id/ec_firmware_release
    3.75
    [root@t1700 ~]#

Signed-off-by: default avatarErwan Velu <e.velu@criteo.com>
Signed-off-by: default avatarJean Delvare <jdelvare@suse.de>
parent 3d77e6a8

drivers/firmware/dmi-id.c

+6 −0
Original line number Diff line number Diff line
@@ -42,6 +42,8 @@ DEFINE_DMI_ATTR_WITH_SHOW(bios_vendor, 0444, DMI_BIOS_VENDOR); 
DEFINE_DMI_ATTR_WITH_SHOW(bios_version,		0444, DMI_BIOS_VERSION);

DEFINE_DMI_ATTR_WITH_SHOW(bios_date,		0444, DMI_BIOS_DATE);

DEFINE_DMI_ATTR_WITH_SHOW(sys_vendor,		0444, DMI_SYS_VENDOR);

DEFINE_DMI_ATTR_WITH_SHOW(bios_release,		0444, DMI_BIOS_RELEASE);

DEFINE_DMI_ATTR_WITH_SHOW(ec_firmware_release,	0444, DMI_EC_FIRMWARE_RELEASE);

DEFINE_DMI_ATTR_WITH_SHOW(product_name,		0444, DMI_PRODUCT_NAME);

DEFINE_DMI_ATTR_WITH_SHOW(product_version,	0444, DMI_PRODUCT_VERSION);

DEFINE_DMI_ATTR_WITH_SHOW(product_serial,	0400, DMI_PRODUCT_SERIAL);
@@ -78,6 +80,8 @@ static ssize_t get_modalias(char *buffer, size_t buffer_size) 
		{ "bvn", DMI_BIOS_VENDOR },

		{ "bvr", DMI_BIOS_VERSION },

		{ "bd",  DMI_BIOS_DATE },

		{ "br",  DMI_BIOS_RELEASE },

		{ "efr", DMI_EC_FIRMWARE_RELEASE },

		{ "svn", DMI_SYS_VENDOR },

		{ "pn",  DMI_PRODUCT_NAME },

		{ "pvr", DMI_PRODUCT_VERSION },
@@ -187,6 +191,8 @@ static void __init dmi_id_init_attr_table(void) 
	ADD_DMI_ATTR(bios_vendor,       DMI_BIOS_VENDOR);

	ADD_DMI_ATTR(bios_version,      DMI_BIOS_VERSION);

	ADD_DMI_ATTR(bios_date,         DMI_BIOS_DATE);

	ADD_DMI_ATTR(bios_release,      DMI_BIOS_RELEASE);

	ADD_DMI_ATTR(ec_firmware_release, DMI_EC_FIRMWARE_RELEASE);

	ADD_DMI_ATTR(sys_vendor,        DMI_SYS_VENDOR);

	ADD_DMI_ATTR(product_name,      DMI_PRODUCT_NAME);

	ADD_DMI_ATTR(product_version,   DMI_PRODUCT_VERSION);

drivers/firmware/dmi_scan.c

+30 −0
Original line number Diff line number Diff line
@@ -186,6 +186,34 @@ static void __init dmi_save_ident(const struct dmi_header *dm, int slot, 
	dmi_ident[slot] = p;

}



static void __init dmi_save_release(const struct dmi_header *dm, int slot,

		int index)

{

	const u8 *minor, *major;

	char *s;



	/* If the table doesn't have the field, let's return */

	if (dmi_ident[slot] || dm->length < index)

		return;



	minor = (u8 *) dm + index;

	major = (u8 *) dm + index - 1;



	/* As per the spec, if the system doesn't support this field,

	 * the value is FF

	 */

	if (*major == 0xFF && *minor == 0xFF)

		return;



	s = dmi_alloc(8);

	if (!s)

		return;



	sprintf(s, "%u.%u", *major, *minor);



	dmi_ident[slot] = s;

}



static void __init dmi_save_uuid(const struct dmi_header *dm, int slot,

		int index)

{
@@ -444,6 +472,8 @@ static void __init dmi_decode(const struct dmi_header *dm, void *dummy) 
		dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);

		dmi_save_ident(dm, DMI_BIOS_VERSION, 5);

		dmi_save_ident(dm, DMI_BIOS_DATE, 8);

		dmi_save_release(dm, DMI_BIOS_RELEASE, 21);

		dmi_save_release(dm, DMI_EC_FIRMWARE_RELEASE, 23);

		break;

	case 1:		/* System Information */

		dmi_save_ident(dm, DMI_SYS_VENDOR, 4);

include/linux/mod_devicetable.h

+2 −0
Original line number Diff line number Diff line
@@ -532,6 +532,8 @@ enum dmi_field { 
	DMI_BIOS_VENDOR,

	DMI_BIOS_VERSION,

	DMI_BIOS_DATE,

	DMI_BIOS_RELEASE,

	DMI_EC_FIRMWARE_RELEASE,

	DMI_SYS_VENDOR,

	DMI_PRODUCT_NAME,

	DMI_PRODUCT_VERSION,

scripts/mod/file2alias.c

+2 −0
Original line number Diff line number Diff line
@@ -954,6 +954,8 @@ static const struct dmifield { 
	{ "bvn", DMI_BIOS_VENDOR },

	{ "bvr", DMI_BIOS_VERSION },

	{ "bd",  DMI_BIOS_DATE },

	{ "br",  DMI_BIOS_RELEASE },

	{ "efr", DMI_EC_FIRMWARE_RELEASE },

	{ "svn", DMI_SYS_VENDOR },

	{ "pn",  DMI_PRODUCT_NAME },

	{ "pvr", DMI_PRODUCT_VERSION },

CRA Git | Maintained and supported by SUSTech CRA and CCSE