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author | Michael Ernst <mernst@de.ibm.com> | 2010-08-09 16:12:50 (GMT) |
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committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-08-09 16:12:53 (GMT) |
commit | fd0457a6ae52141718a15652fb80d867e1bf1d10 (patch) | |
tree | 5bbc54259c2ddfbf96a2be728e8d971fdb7f2039 /drivers/s390/cio/device.c | |
parent | 45d7f32c7a43cbb9592886d38190e379e2eb2226 (diff) | |
download | linux-fsl-qoriq-fd0457a6ae52141718a15652fb80d867e1bf1d10.tar.xz |
[S390] cio: CHSC SIOSL Support
A Linux interface for the CHSC command
store-I/O-operation-status-and-initiate-logging (SIOSL).
Model-dependent logging within the channel subsystem can be invoked
via a helper function or a writable subchannel device attribute.
Signed-off-by: Michael Ernst <mernst@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/device.c')
-rw-r--r-- | drivers/s390/cio/device.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 6d229f3..75acec3 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -36,6 +36,7 @@ #include "ioasm.h" #include "io_sch.h" #include "blacklist.h" +#include "chsc.h" static struct timer_list recovery_timer; static DEFINE_SPINLOCK(recovery_lock); @@ -598,6 +599,25 @@ available_show (struct device *dev, struct device_attribute *attr, char *buf) } } +static ssize_t +initiate_logging(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct subchannel *sch = to_subchannel(dev); + int rc; + + rc = chsc_siosl(sch->schid); + if (rc < 0) { + pr_warning("Logging for subchannel 0.%x.%04x failed with " + "errno=%d\n", + sch->schid.ssid, sch->schid.sch_no, rc); + return rc; + } + pr_notice("Logging for subchannel 0.%x.%04x was triggered\n", + sch->schid.ssid, sch->schid.sch_no); + return count; +} + static DEVICE_ATTR(chpids, 0444, chpids_show, NULL); static DEVICE_ATTR(pimpampom, 0444, pimpampom_show, NULL); static DEVICE_ATTR(devtype, 0444, devtype_show, NULL); @@ -605,10 +625,12 @@ static DEVICE_ATTR(cutype, 0444, cutype_show, NULL); static DEVICE_ATTR(modalias, 0444, modalias_show, NULL); static DEVICE_ATTR(online, 0644, online_show, online_store); static DEVICE_ATTR(availability, 0444, available_show, NULL); +static DEVICE_ATTR(logging, 0200, NULL, initiate_logging); static struct attribute *io_subchannel_attrs[] = { &dev_attr_chpids.attr, &dev_attr_pimpampom.attr, + &dev_attr_logging.attr, NULL, }; @@ -2036,6 +2058,21 @@ void ccw_device_sched_todo(struct ccw_device *cdev, enum cdev_todo todo) } } +/** + * ccw_device_siosl() - initiate logging + * @cdev: ccw device + * + * This function is used to invoke model-dependent logging within the channel + * subsystem. + */ +int ccw_device_siosl(struct ccw_device *cdev) +{ + struct subchannel *sch = to_subchannel(cdev->dev.parent); + + return chsc_siosl(sch->schid); +} +EXPORT_SYMBOL_GPL(ccw_device_siosl); + MODULE_LICENSE("GPL"); EXPORT_SYMBOL(ccw_device_set_online); EXPORT_SYMBOL(ccw_device_set_offline); |