s390/zcrypt: Introduce new zcrypt device status API
Introduce new ioctl (ZDEVICESTATUS) to provide detailed
information, like hardware type, domains, status and functionality
of available crypto devices.
Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
index fd0ae8c..403af9d 100644
--- a/drivers/s390/crypto/zcrypt_api.c
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -539,6 +539,29 @@ static long zcrypt_rng(char *buffer)
return rc;
}
+static void zcrypt_device_status_mask(struct zcrypt_device_matrix *matrix)
+{
+ struct zcrypt_card *zc;
+ struct zcrypt_queue *zq;
+ struct zcrypt_device_status *stat;
+
+ memset(matrix, 0, sizeof(*matrix));
+ spin_lock(&zcrypt_list_lock);
+ for_each_zcrypt_card(zc) {
+ for_each_zcrypt_queue(zq, zc) {
+ stat = matrix->device;
+ stat += AP_QID_CARD(zq->queue->qid) * MAX_ZDEV_DOMAINS;
+ stat += AP_QID_QUEUE(zq->queue->qid);
+ stat->hwtype = zc->card->ap_dev.device_type;
+ stat->functions = zc->card->functions >> 26;
+ stat->qid = zq->queue->qid;
+ stat->online = zq->online ? 0x01 : 0x00;
+ }
+ }
+ spin_unlock(&zcrypt_list_lock);
+}
+EXPORT_SYMBOL(zcrypt_device_status_mask);
+
static void zcrypt_status_mask(char status[AP_DEVICES])
{
struct zcrypt_card *zc;
@@ -764,6 +787,25 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
return -EFAULT;
return rc;
}
+ case ZDEVICESTATUS: {
+ struct zcrypt_device_matrix *device_status;
+
+ device_status = kzalloc(sizeof(struct zcrypt_device_matrix),
+ GFP_KERNEL);
+ if (!device_status)
+ return -ENOMEM;
+
+ zcrypt_device_status_mask(device_status);
+
+ if (copy_to_user((char __user *) arg, device_status,
+ sizeof(struct zcrypt_device_matrix))) {
+ kfree(device_status);
+ return -EFAULT;
+ }
+
+ kfree(device_status);
+ return 0;
+ }
case Z90STAT_STATUS_MASK: {
char status[AP_DEVICES];
zcrypt_status_mask(status);