s390/zcrypt: add new low level ep11 functions support file

This patch introduces two new files which provide some
low level functions to interact with EP11 crypto cards:

ep11_get_card_info() sends an EP11 query module info CPRB to the
  addressed card, processes the returning reply and exposes some of
  the information returned in the new ep11_card_info struct.

ep11_get_domain_info() sends an EP11 query domain info CPRB to the
  addressed card/queue, processes the returning reply and exposes some
  of the information returned in the new ep11_domain_info struct.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/drivers/s390/crypto/zcrypt_ep11misc.h b/drivers/s390/crypto/zcrypt_ep11misc.h
new file mode 100644
index 000000000000..9559a81eac5e
--- /dev/null
+++ b/drivers/s390/crypto/zcrypt_ep11misc.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ *  Copyright IBM Corp. 2019
+ *  Author(s): Harald Freudenberger <freude@linux.ibm.com>
+ *
+ *  Collection of EP11 misc functions used by zcrypt and pkey
+ */
+
+#ifndef _ZCRYPT_EP11MISC_H_
+#define _ZCRYPT_EP11MISC_H_
+
+#include <asm/zcrypt.h>
+#include <asm/pkey.h>
+
+/* EP11 card info struct */
+struct ep11_card_info {
+	u32  API_ord_nr;    /* API ordinal number */
+	u16  FW_version;    /* Firmware major and minor version */
+	char serial[16];    /* serial number string (16 ascii, no 0x00 !) */
+	u64  op_mode;	    /* card operational mode(s) */
+};
+
+/* EP11 domain info struct */
+struct ep11_domain_info {
+	char cur_wk_state;  /* '0' invalid, '1' valid */
+	char new_wk_state;  /* '0' empty, '1' uncommitted, '2' committed */
+	u8   cur_wkvp[32];  /* current wrapping key verification pattern */
+	u8   new_wkvp[32];  /* new wrapping key verification pattern */
+	u64  op_mode;	    /* domain operational mode(s) */
+};
+
+/*
+ * Provide information about an EP11 card.
+ */
+int ep11_get_card_info(u16 card, struct ep11_card_info *info, int verify);
+
+/*
+ * Provide information about a domain within an EP11 card.
+ */
+int ep11_get_domain_info(u16 card, u16 domain, struct ep11_domain_info *info);
+
+void zcrypt_ep11misc_exit(void);
+
+#endif /* _ZCRYPT_EP11MISC_H_ */