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authorHarald Freudenberger <freude@linux.vnet.ibm.com>2016-11-15 09:05:00 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2017-02-23 10:06:39 +0100
commitd0360d7b523f150c2ff0ab3c9361dfc3b4185cbf (patch)
treeb80655186deb374865263cb274c5d1a46791f877 /drivers/s390
parent54397bb0bbedbb9f7d77a62f6ddc6869354e3d9f (diff)
downloadlinux-d0360d7b523f150c2ff0ab3c9361dfc3b4185cbf.tar.bz2
s390/zcrypt: Enable request count reset for cards and queues.
This patch introduces the possibility to reset the request_count attribute for cards and queues to zero. This can be used to set a clear state on the counters before running an application and try out if and which hardware is actually used. If the request_count counter of a card is reset, for all associated queues the request_count is also zeroed. If just a queue request_count is reset the card counter is not updated however. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/crypto/ap_card.c24
-rw-r--r--drivers/s390/crypto/ap_queue.c21
2 files changed, 37 insertions, 8 deletions
diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c
index 1cd9128593e4..cfa161ccc74e 100644
--- a/drivers/s390/crypto/ap_card.c
+++ b/drivers/s390/crypto/ap_card.c
@@ -58,9 +58,9 @@ static ssize_t ap_functions_show(struct device *dev,
static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL);
-static ssize_t ap_request_count_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t ap_req_count_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
struct ap_card *ac = to_ap_card(dev);
unsigned int req_cnt;
@@ -72,7 +72,23 @@ static ssize_t ap_request_count_show(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", req_cnt);
}
-static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL);
+static ssize_t ap_req_count_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ap_card *ac = to_ap_card(dev);
+ struct ap_queue *aq;
+
+ spin_lock_bh(&ap_list_lock);
+ for_each_ap_queue(aq, ac)
+ aq->total_request_count = 0;
+ spin_unlock_bh(&ap_list_lock);
+ atomic_set(&ac->total_request_count, 0);
+
+ return count;
+}
+
+static DEVICE_ATTR(request_count, 0644, ap_req_count_show, ap_req_count_store);
static ssize_t ap_requestq_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
diff --git a/drivers/s390/crypto/ap_queue.c b/drivers/s390/crypto/ap_queue.c
index 7be67fa9f224..480c58a63769 100644
--- a/drivers/s390/crypto/ap_queue.c
+++ b/drivers/s390/crypto/ap_queue.c
@@ -459,9 +459,9 @@ EXPORT_SYMBOL(ap_queue_resume);
/*
* AP queue related attributes.
*/
-static ssize_t ap_request_count_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t ap_req_count_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
struct ap_queue *aq = to_ap_queue(dev);
unsigned int req_cnt;
@@ -472,7 +472,20 @@ static ssize_t ap_request_count_show(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", req_cnt);
}
-static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL);
+static ssize_t ap_req_count_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ap_queue *aq = to_ap_queue(dev);
+
+ spin_lock_bh(&aq->lock);
+ aq->total_request_count = 0;
+ spin_unlock_bh(&aq->lock);
+
+ return count;
+}
+
+static DEVICE_ATTR(request_count, 0644, ap_req_count_show, ap_req_count_store);
static ssize_t ap_requestq_count_show(struct device *dev,
struct device_attribute *attr, char *buf)