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[PATCH] s390: channel path measurements

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Gather extended measurements for channel paths from the channel subsystem and
expose them to userspace via a sysfs attribute.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Cornelia Huck
2006-03-24 03:15:14 -08:00
committed by Linus Torvalds
parent dc06010c62
commit 495a5b45ac
4 changed files with 500 additions and 23 deletions
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41
drivers/s390/cio/css.c
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@@ -452,15 +452,50 @@ channel_subsystem_release(struct device *dev)
struct channel_subsystem *css;
css = to_css(dev);
mutex_destroy(&css->mutex);
kfree(css);
}
static ssize_t
css_cm_enable_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct channel_subsystem *css = to_css(dev);
if (!css)
return 0;
return sprintf(buf, "%x\n", css->cm_enabled);
}
static ssize_t
css_cm_enable_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct channel_subsystem *css = to_css(dev);
int ret;
switch (buf[0]) {
case '0':
ret = css->cm_enabled ? chsc_secm(css, 0) : 0;
break;
case '1':
ret = css->cm_enabled ? 0 : chsc_secm(css, 1);
break;
default:
ret = -EINVAL;
}
return ret < 0 ? ret : count;
}
static DEVICE_ATTR(cm_enable, 0644, css_cm_enable_show, css_cm_enable_store);
static inline void __init
setup_css(int nr)
{
u32 tod_high;
memset(css[nr], 0, sizeof(struct channel_subsystem));
mutex_init(&css[nr]->mutex);
css[nr]->valid = 1;
css[nr]->cssid = nr;
sprintf(css[nr]->device.bus_id, "css%x", nr);
@@ -507,6 +542,9 @@ init_channel_subsystem (void)
ret = device_register(&css[i]->device);
if (ret)
goto out_free;
if (css_characteristics_avail && css_chsc_characteristics.secm)
device_create_file(&css[i]->device,
&dev_attr_cm_enable);
}
css_init_done = 1;
@@ -519,6 +557,9 @@ out_free:
out_unregister:
while (i > 0) {
i--;
if (css_characteristics_avail && css_chsc_characteristics.secm)
device_remove_file(&css[i]->device,
&dev_attr_cm_enable);
device_unregister(&css[i]->device);
}
out_bus: