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Commit ba54229d authored by Peter Oberparleiter's avatar Peter Oberparleiter Committed by Martin Schwidefsky
Browse files

s390/cio: add channel ID sysfs attribute 



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: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarPeter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent aca91209

drivers/s390/cio/chp.c

+36 −0
Original line number Diff line number Diff line
@@ -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 = {

drivers/s390/cio/chsc.h

+3 −1
Original line number Diff line number Diff line
@@ -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;