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s390/cio: add channel ID sysfs attribute

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Add new attributes "chid" and "chid_external" to the channel-path
sysfs directory. These attributes contain information related to
the channel-ID of the channel-path.

Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Peter Oberparleiter 2013-05-15 13:43:29 +02:00 committed by Martin Schwidefsky
parent aca9120977
commit ba54229db6
2 changed files with 39 additions and 1 deletions
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36
drivers/s390/cio/chp.c
View File

@ -352,12 +352,48 @@ static ssize_t chp_shared_show(struct device *dev,
static DEVICE_ATTR(shared, 0444, chp_shared_show, NULL);
static ssize_t chp_chid_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct channel_path *chp = to_channelpath(dev);
ssize_t rc;
mutex_lock(&chp->lock);
if (chp->desc_fmt1.flags & 0x10)
rc = sprintf(buf, "%04x\n", chp->desc_fmt1.chid);
else
rc = 0;
mutex_unlock(&chp->lock);
return rc;
}
static DEVICE_ATTR(chid, 0444, chp_chid_show, NULL);
static ssize_t chp_chid_external_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct channel_path *chp = to_channelpath(dev);
ssize_t rc;
mutex_lock(&chp->lock);
if (chp->desc_fmt1.flags & 0x10)
rc = sprintf(buf, "%x\n", chp->desc_fmt1.flags & 0x8 ? 1 : 0);
else
rc = 0;
mutex_unlock(&chp->lock);
return rc;
}
static DEVICE_ATTR(chid_external, 0444, chp_chid_external_show, NULL);
static struct attribute *chp_attrs[] = {
&dev_attr_status.attr,
&dev_attr_configure.attr,
&dev_attr_type.attr,
&dev_attr_cmg.attr,
&dev_attr_shared.attr,
&dev_attr_chid.attr,
&dev_attr_chid_external.attr,
NULL,
};
static struct attribute_group chp_attr_group = {

4
drivers/s390/cio/chsc.h
View File

@ -43,7 +43,9 @@ struct channel_path_desc_fmt1 {
u8 chpid;
u32:24;
u8 chpp;
u32 unused[3];
u32 unused[2];
u16 chid;
u32:16;
u16 mdc;
u16:13;
u8 r:1;