[S390] zcrypt: add support for large random numbers

[linux-2.6] / drivers / s390 / crypto / zcrypt_api.h

diff --git a/drivers/s390/crypto/zcrypt_api.h b/drivers/s390/crypto/zcrypt_api.h
index de4877ee618f99f278ec7136f358882c07e6aa79..0e948528a73a8ba0b9276b454acfbb8421ec8013 100644 (file)
--- a/drivers/s390/crypto/zcrypt_api.h
+++ b/drivers/s390/crypto/zcrypt_api.h
@@ -100,6 +100,13 @@ struct ica_z90_status {
 #define ZCRYPT_CEX2C           5
 #define ZCRYPT_CEX2A           6
 
+/**
+ * Large random numbers are pulled in 4096 byte chunks from the crypto cards
+ * and stored in a page. Be carefull when increasing this buffer due to size
+ * limitations for AP requests.
+ */
+#define ZCRYPT_RNG_BUFFER_SIZE 4096
+
 struct zcrypt_device;
 
 struct zcrypt_ops {
@@ -107,6 +114,7 @@ struct zcrypt_ops {
        long (*rsa_modexpo_crt)(struct zcrypt_device *,
                                struct ica_rsa_modexpo_crt *);
        long (*send_cprb)(struct zcrypt_device *, struct ica_xcRB *);
+       long (*rng)(struct zcrypt_device *, char *);
 };
 
 struct zcrypt_device {