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| author | Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | 2013-05-15 13:43:29 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-05-15 16:47:39 +0200 |
| commit | ba54229db65b161d46df449638a1a386444681b0 (patch) | |
| tree | e9bce225c9a990b0cf514680ddbaa3f1b3c318c7 /drivers/s390 | |
| parent | s390/ftrace: fix mcount adjustment (diff) | |
| download | linux-ba54229db65b161d46df449638a1a386444681b0.tar.xz linux-ba54229db65b161d46df449638a1a386444681b0.zip | |
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: 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>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/cio/chp.c | 36 | ||||
| -rw-r--r-- | drivers/s390/cio/chsc.h | 4 |
2 files changed, 39 insertions, 1 deletions
diff --git a/drivers/s390/cio/chp.c b/drivers/s390/cio/chp.c index 21fabc6d5a9c..6c440d4349d4 100644 --- a/drivers/s390/cio/chp.c +++ b/drivers/s390/cio/chp.c @@ -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 = { diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h index 349d5fc47196..e7ef2a683b8f 100644 --- a/drivers/s390/cio/chsc.h +++ b/drivers/s390/cio/chsc.h @@ -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; |