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authorErwan Velu <e.velu@criteo.com>2020-06-06 11:35:50 +0200
committerJean Delvare <jdelvare@suse.de>2020-06-06 11:35:50 +0200
commitf5152f4ded3ce6d332d5e4f9d7e325c3b81cae1b (patch)
tree15a1db9c77b0e01013af654fd0e1c775c6bda201 /drivers/firmware
parent3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 (diff)
downloadlinux-f5152f4ded3ce6d332d5e4f9d7e325c3b81cae1b.tar.bz2
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>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/dmi-id.c6
-rw-r--r--drivers/firmware/dmi_scan.c30
2 files changed, 36 insertions, 0 deletions
diff --git a/drivers/firmware/dmi-id.c b/drivers/firmware/dmi-id.c
index ff39f64f2aae..86d71b0212b1 100644
--- a/drivers/firmware/dmi-id.c
+++ b/drivers/firmware/dmi-id.c
@@ -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);
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index f59163cb7cba..5066d1f1d687 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);