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: Erwan Velu <e.velu@criteo.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index f59163c..5066d1f 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -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);