summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/s390/crypto/ap_bus.h3
-rw-r--r--drivers/s390/crypto/ap_card.c4
-rw-r--r--drivers/s390/crypto/ap_queue.c1
-rw-r--r--drivers/s390/crypto/zcrypt_api.c63
4 files changed, 47 insertions, 24 deletions
diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h
index 54b17e142792..4dc7c88fb054 100644
--- a/drivers/s390/crypto/ap_bus.h
+++ b/drivers/s390/crypto/ap_bus.h
@@ -195,6 +195,7 @@ struct ap_card {
unsigned int functions; /* AP device function bitfield. */
int queue_depth; /* AP queue depth.*/
int id; /* AP card number. */
+ atomic_t total_request_count; /* # requests ever for this AP device.*/
};
#define to_ap_card(x) container_of((x), struct ap_card, ap_dev.device)
@@ -211,7 +212,7 @@ struct ap_queue {
enum ap_state state; /* State of the AP device. */
int pendingq_count; /* # requests on pendingq list. */
int requestq_count; /* # requests on requestq list. */
- int total_request_count; /* # requests ever for this AP device. */
+ int total_request_count; /* # requests ever for this AP device.*/
int request_timeout; /* Request timout in jiffies. */
struct timer_list timeout; /* Timer for request timeouts. */
struct list_head pendingq; /* List of message sent to AP queue. */
diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c
index 731dc0dbfb75..0110d44172a3 100644
--- a/drivers/s390/crypto/ap_card.c
+++ b/drivers/s390/crypto/ap_card.c
@@ -63,13 +63,11 @@ static ssize_t ap_request_count_show(struct device *dev,
char *buf)
{
struct ap_card *ac = to_ap_card(dev);
- struct ap_queue *aq;
unsigned int req_cnt;
req_cnt = 0;
spin_lock_bh(&ap_list_lock);
- for_each_ap_queue(aq, ac)
- req_cnt += aq->total_request_count;
+ req_cnt = atomic_read(&ac->total_request_count);
spin_unlock_bh(&ap_list_lock);
return snprintf(buf, PAGE_SIZE, "%d\n", req_cnt);
}
diff --git a/drivers/s390/crypto/ap_queue.c b/drivers/s390/crypto/ap_queue.c
index 8f95a071b670..b58a917dc510 100644
--- a/drivers/s390/crypto/ap_queue.c
+++ b/drivers/s390/crypto/ap_queue.c
@@ -625,6 +625,7 @@ void ap_queue_message(struct ap_queue *aq, struct ap_message *ap_msg)
list_add_tail(&ap_msg->list, &aq->requestq);
aq->requestq_count++;
aq->total_request_count++;
+ atomic_inc(&aq->card->total_request_count);
/* Send/receive as many request from the queue as possible. */
ap_wait(ap_sm_event_loop(aq, AP_EVENT_POLL));
spin_unlock_bh(&aq->lock);
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
index 403af9d1ebde..c7b5e70f2938 100644
--- a/drivers/s390/crypto/zcrypt_api.c
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -188,6 +188,34 @@ static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
module_put(mod);
}
+static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
+ struct zcrypt_card *pref_zc,
+ unsigned weight, unsigned pref_weight)
+{
+ if (!pref_zc)
+ return 0;
+ weight += atomic_read(&zc->load);
+ pref_weight += atomic_read(&pref_zc->load);
+ if (weight == pref_weight)
+ return atomic_read(&zc->card->total_request_count) >
+ atomic_read(&pref_zc->card->total_request_count);
+ return weight > pref_weight;
+}
+
+static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
+ struct zcrypt_queue *pref_zq,
+ unsigned weight, unsigned pref_weight)
+{
+ if (!pref_zq)
+ return 0;
+ weight += atomic_read(&zq->load);
+ pref_weight += atomic_read(&pref_zq->load);
+ if (weight == pref_weight)
+ return &zq->queue->total_request_count >
+ &pref_zq->queue->total_request_count;
+ return weight > pref_weight;
+}
+
/*
* zcrypt ioctls.
*/
@@ -225,15 +253,14 @@ static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
continue;
/* get weight index of the card device */
weight = zc->speed_rating[func_code];
- if (pref_zc && atomic_read(&zc->load) + weight >=
- atomic_read(&pref_zc->load) + pref_weight)
+ if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
continue;
for_each_zcrypt_queue(zq, zc) {
/* check if device is online and eligible */
if (!zq->online)
continue;
- if (pref_zq && atomic_read(&zq->load) + weight >=
- atomic_read(&pref_zq->load) + pref_weight)
+ if (zcrypt_queue_compare(zq, pref_zq,
+ weight, pref_weight))
continue;
pref_zc = zc;
pref_zq = zq;
@@ -289,15 +316,14 @@ static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
continue;
/* get weight index of the card device */
weight = zc->speed_rating[func_code];
- if (pref_zc && atomic_read(&zc->load) + weight >=
- atomic_read(&pref_zc->load) + pref_weight)
+ if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
continue;
for_each_zcrypt_queue(zq, zc) {
/* check if device is online and eligible */
if (!zq->online)
continue;
- if (pref_zq && atomic_read(&zq->load) + weight >=
- atomic_read(&pref_zq->load) + pref_weight)
+ if (zcrypt_queue_compare(zq, pref_zq,
+ weight, pref_weight))
continue;
pref_zc = zc;
pref_zq = zq;
@@ -346,8 +372,7 @@ static long zcrypt_send_cprb(struct ica_xcRB *xcRB)
continue;
/* get weight index of the card device */
weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
- if (pref_zc && atomic_read(&zc->load) + weight >=
- atomic_read(&pref_zc->load) + pref_weight)
+ if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
continue;
for_each_zcrypt_queue(zq, zc) {
/* check if device is online and eligible */
@@ -355,8 +380,8 @@ static long zcrypt_send_cprb(struct ica_xcRB *xcRB)
((*domain != (unsigned short) AUTOSELECT) &&
(*domain != AP_QID_QUEUE(zq->queue->qid))))
continue;
- if (pref_zq && atomic_read(&zq->load) + weight >=
- atomic_read(&pref_zq->load) + pref_weight)
+ if (zcrypt_queue_compare(zq, pref_zq,
+ weight, pref_weight))
continue;
pref_zc = zc;
pref_zq = zq;
@@ -450,8 +475,7 @@ static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
continue;
/* get weight index of the card device */
weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
- if (pref_zc && atomic_read(&zc->load) + weight >=
- atomic_read(&pref_zc->load) + pref_weight)
+ if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
continue;
for_each_zcrypt_queue(zq, zc) {
/* check if device is online and eligible */
@@ -460,8 +484,8 @@ static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
!is_desired_ep11_queue(zq->queue->qid,
target_num, targets)))
continue;
- if (pref_zq && atomic_read(&zq->load) + weight >=
- atomic_read(&pref_zq->load) + pref_weight)
+ if (zcrypt_queue_compare(zq, pref_zq,
+ weight, pref_weight))
continue;
pref_zc = zc;
pref_zq = zq;
@@ -510,15 +534,14 @@ static long zcrypt_rng(char *buffer)
continue;
/* get weight index of the card device */
weight = zc->speed_rating[func_code];
- if (pref_zc && atomic_read(&zc->load) + weight >=
- atomic_read(&pref_zc->load) + pref_weight)
+ if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
continue;
for_each_zcrypt_queue(zq, zc) {
/* check if device is online and eligible */
if (!zq->online)
continue;
- if (pref_zq && atomic_read(&zq->load) + weight >=
- atomic_read(&pref_zq->load) + pref_weight)
+ if (zcrypt_queue_compare(zq, pref_zq,
+ weight, pref_weight))
continue;
pref_zc = zc;
pref_zq = zq;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-22 21:41:56 +0300