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mei: bus: export client protocol version

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export me client protocol version to sysfs and uevent

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler 2015-09-10 10:18:00 +03:00 committed by Greg Kroah-Hartman
parent 59796edcf2
commit 40b7320ee4
3 changed files with 37 additions and 0 deletions
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7
Documentation/ABI/testing/sysfs-bus-mei
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@ -19,3 +19,10 @@ KernelVersion: 4.2
Contact: Tomas Winkler <tomas.winkler@intel.com> Contact: Tomas Winkler <tomas.winkler@intel.com>
Description: Stores mei client device uuid Description: Stores mei client device uuid
Format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx Format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
What: /sys/bus/mei/devices/.../version
Date: Aug 2015
KernelVersion: 4.3
Contact: Tomas Winkler <tomas.winkler@intel.com>
Description: Stores mei client protocol version
Format: %d

18
drivers/misc/mei/bus.c
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@ -590,6 +590,19 @@ static ssize_t uuid_show(struct device *dev, struct device_attribute *a,
} }
static DEVICE_ATTR_RO(uuid); static DEVICE_ATTR_RO(uuid);
static ssize_t version_show(struct device *dev, struct device_attribute *a,
char *buf)
{
struct mei_cl_device *cldev = to_mei_cl_device(dev);
u8 version = mei_me_cl_ver(cldev->me_cl);
size_t len;
len = snprintf(buf, PAGE_SIZE, "%02X", version);
return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
}
static DEVICE_ATTR_RO(version);
static ssize_t modalias_show(struct device *dev, struct device_attribute *a, static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
char *buf) char *buf)
{ {
@ -605,6 +618,7 @@ static DEVICE_ATTR_RO(modalias);
static struct attribute *mei_cl_dev_attrs[] = { static struct attribute *mei_cl_dev_attrs[] = {
&dev_attr_name.attr, &dev_attr_name.attr,
&dev_attr_uuid.attr, &dev_attr_uuid.attr,
&dev_attr_version.attr,
&dev_attr_modalias.attr, &dev_attr_modalias.attr,
NULL, NULL,
}; };
@ -622,6 +636,10 @@ static int mei_cl_device_uevent(struct device *dev, struct kobj_uevent_env *env)
{ {
struct mei_cl_device *cldev = to_mei_cl_device(dev); struct mei_cl_device *cldev = to_mei_cl_device(dev);
const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl); const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
u8 version = mei_me_cl_ver(cldev->me_cl);
if (add_uevent_var(env, "MEI_CL_VERSION=%d", version))
return -ENOMEM;
if (add_uevent_var(env, "MEI_CL_UUID=%pUl", uuid)) if (add_uevent_var(env, "MEI_CL_UUID=%pUl", uuid))
return -ENOMEM; return -ENOMEM;

12
drivers/misc/mei/client.h
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@ -68,6 +68,18 @@ static inline const uuid_le *mei_me_cl_uuid(const struct mei_me_client *me_cl)
return &me_cl->props.protocol_name; return &me_cl->props.protocol_name;
} }
/**
* mei_me_cl_ver - return me client protocol version
*
* @me_cl: me client
*
* Return: me client protocol version
*/
static inline u8 mei_me_cl_ver(const struct mei_me_client *me_cl)
{
return me_cl->props.protocol_version;
}
/* /*
* MEI IO Functions * MEI IO Functions
*/ */