xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Förgrening 0
Kod Ärenden Pull-förfrågningar Actions Packages Projekt Släpp Wiki Aktiviteter

[S390] cio: CHSC SIOSL Support

Bläddra i källkod 
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>
This commit is contained in:
Michael Ernst
2010-08-09 18:12:50 +02:00
committad av Martin Schwidefsky
förälder 45d7f32c7a
incheckning fd0457a6ae
4 ändrade filer med 89 tillägg och 0 borttagningar
Download Patch File Download Diff File Expand all files Collapse all files

37
drivers/s390/cio/device.c
Visa fil

@@ -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);