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s390/zcrypt: Show load of cards and queues in sysfs

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Show the current load value of cards and queues in sysfs.
The load value for each card and queue is maintained by
the zcrypt device driver for dispatching and load
balancing requests over the available devices.

This patch provides the load value to userspace via a
new read only sysfs attribute 'load' per card and queue.

Signed-off-by: Harald Freudenberger <freude@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Harald Freudenberger 2018-06-07 15:09:48 +02:00 committed by Martin Schwidefsky
parent df80c03831
commit 4a07750ba8
2 changed files with 24 additions and 0 deletions
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12
drivers/s390/crypto/zcrypt_card.c
View File

@ -83,9 +83,21 @@ static ssize_t zcrypt_card_online_store(struct device *dev,
static DEVICE_ATTR(online, 0644, zcrypt_card_online_show,
zcrypt_card_online_store);
static ssize_t zcrypt_card_load_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct zcrypt_card *zc = to_ap_card(dev)->private;
return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zc->load));
}
static DEVICE_ATTR(load, 0444, zcrypt_card_load_show, NULL);
static struct attribute *zcrypt_card_attrs[] = {
&dev_attr_type.attr,
&dev_attr_online.attr,
&dev_attr_load.attr,
NULL,
};

12
drivers/s390/crypto/zcrypt_queue.c
View File

@ -75,8 +75,20 @@ static ssize_t zcrypt_queue_online_store(struct device *dev,
static DEVICE_ATTR(online, 0644, zcrypt_queue_online_show,
zcrypt_queue_online_store);
static ssize_t zcrypt_queue_load_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct zcrypt_queue *zq = to_ap_queue(dev)->private;
return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zq->load));
}
static DEVICE_ATTR(load, 0444, zcrypt_queue_load_show, NULL);
static struct attribute *zcrypt_queue_attrs[] = {
&dev_attr_online.attr,
&dev_attr_load.attr,
NULL,
};