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authorAlexander Usyskin <alexander.usyskin@intel.com>2018-06-25 00:11:41 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-07-03 13:11:20 +0200
commit3cfaeb33530592b02b2ceb76b379364c55ca612e (patch)
tree16b29db30b99b2a233b0817a6f694d6c15bf02b0 /drivers/misc/mei/main.c
parent9a7c0b69b6e765c655133ef530876aea3da71d58 (diff)
downloadlinux-3cfaeb33530592b02b2ceb76b379364c55ca612e.tar.bz2
mei: expose fw version to sysfs
The ME FW version is constantly used by detection and update tools. To improve the reliability and simplify these tools provide a sysfs interface to access version of the platform ME firmware in the following format: <platform>:<major>.<minor>.<milestone>.<build>. There can be up to three such blocks for different FW components. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei/main.c')
-rw-r--r--drivers/misc/mei/main.c30
1 files changed, 29 insertions, 1 deletions
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 7465f17e1559..f690918f7817 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -1,7 +1,7 @@
/*
*
* Intel Management Engine Interface (Intel MEI) Linux driver
- * Copyright (c) 2003-2012, Intel Corporation.
+ * Copyright (c) 2003-2018, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -812,11 +812,39 @@ static ssize_t tx_queue_limit_store(struct device *device,
}
static DEVICE_ATTR_RW(tx_queue_limit);
+/**
+ * fw_ver_show - display ME FW version
+ *
+ * @device: device pointer
+ * @attr: attribute pointer
+ * @buf: char out buffer
+ *
+ * Return: number of the bytes printed into buf or error
+ */
+static ssize_t fw_ver_show(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct mei_device *dev = dev_get_drvdata(device);
+ struct mei_fw_version *ver;
+ ssize_t cnt = 0;
+ int i;
+
+ ver = dev->fw_ver;
+
+ for (i = 0; i < MEI_MAX_FW_VER_BLOCKS; i++)
+ cnt += scnprintf(buf + cnt, PAGE_SIZE - cnt, "%u:%u.%u.%u.%u\n",
+ ver[i].platform, ver[i].major, ver[i].minor,
+ ver[i].hotfix, ver[i].buildno);
+ return cnt;
+}
+static DEVICE_ATTR_RO(fw_ver);
+
static struct attribute *mei_attrs[] = {
&dev_attr_fw_status.attr,
&dev_attr_hbm_ver.attr,
&dev_attr_hbm_ver_drv.attr,
&dev_attr_tx_queue_limit.attr,
+ &dev_attr_fw_ver.attr,
NULL
};
ATTRIBUTE_GROUPS(mei);