[S390] zcrypt CEX2A, CEX2C, PCICA accelerator card ap bus drivers.

Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 133 insertions, 0 deletions

diff --git a/drivers/s390/crypto/zcrypt_error.h b/drivers/s390/crypto/zcrypt_error.h
new file mode 100644
index 000000000000..b22bd055a03b
--- /dev/null
+++ b/drivers/s390/crypto/zcrypt_error.h
@@ -0,0 +1,133 @@
+/*
+ *  linux/drivers/s390/crypto/zcrypt_error.h
+ *
+ *  zcrypt 2.0.0
+ *
+ *  Copyright (C)  2001, 2006 IBM Corporation
+ *  Author(s): Robert Burroughs
+ *	       Eric Rossman (edrossma@us.ibm.com)
+ *
+ *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
+ *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _ZCRYPT_ERROR_H_
+#define _ZCRYPT_ERROR_H_
+
+#include "zcrypt_api.h"
+
+/**
+ * Reply Messages
+ *
+ * Error reply messages are of two types:
+ *    82:  Error (see below)
+ *    88:  Error (see below)
+ * Both type 82 and type 88 have the same structure in the header.
+ *
+ * Request reply messages are of three known types:
+ *    80:  Reply from a Type 50 Request (see CEX2A-RELATED STRUCTS)
+ *    84:  Reply from a Type 4 Request (see PCICA-RELATED STRUCTS)
+ *    86:  Reply from a Type 6 Request (see PCICC/PCIXCC/CEX2C-RELATED STRUCTS)
+ *
+ */
+struct error_hdr {
+	unsigned char reserved1;	/* 0x00			*/
+	unsigned char type;		/* 0x82 or 0x88		*/
+	unsigned char reserved2[2];	/* 0x0000		*/
+	unsigned char reply_code;	/* reply code		*/
+	unsigned char reserved3[3];	/* 0x000000		*/
+};
+
+#define TYPE82_RSP_CODE 0x82
+#define TYPE88_RSP_CODE 0x88
+
+#define REP82_ERROR_MACHINE_FAILURE  0x10
+#define REP82_ERROR_PREEMPT_FAILURE  0x12
+#define REP82_ERROR_CHECKPT_FAILURE  0x14
+#define REP82_ERROR_MESSAGE_TYPE     0x20
+#define REP82_ERROR_INVALID_COMM_CD  0x21	/* Type 84	*/
+#define REP82_ERROR_INVALID_MSG_LEN  0x23
+#define REP82_ERROR_RESERVD_FIELD    0x24	/* was 0x50	*/
+#define REP82_ERROR_FORMAT_FIELD     0x29
+#define REP82_ERROR_INVALID_COMMAND  0x30
+#define REP82_ERROR_MALFORMED_MSG    0x40
+#define REP82_ERROR_RESERVED_FIELDO  0x50	/* old value	*/
+#define REP82_ERROR_WORD_ALIGNMENT   0x60
+#define REP82_ERROR_MESSAGE_LENGTH   0x80
+#define REP82_ERROR_OPERAND_INVALID  0x82
+#define REP82_ERROR_OPERAND_SIZE     0x84
+#define REP82_ERROR_EVEN_MOD_IN_OPND 0x85
+#define REP82_ERROR_RESERVED_FIELD   0x88
+#define REP82_ERROR_TRANSPORT_FAIL   0x90
+#define REP82_ERROR_PACKET_TRUNCATED 0xA0
+#define REP82_ERROR_ZERO_BUFFER_LEN  0xB0
+
+#define REP88_ERROR_MODULE_FAILURE   0x10
+
+#define REP88_ERROR_MESSAGE_TYPE     0x20
+#define REP88_ERROR_MESSAGE_MALFORMD 0x22
+#define REP88_ERROR_MESSAGE_LENGTH   0x23
+#define REP88_ERROR_RESERVED_FIELD   0x24
+#define REP88_ERROR_KEY_TYPE	     0x34
+#define REP88_ERROR_INVALID_KEY      0x82	/* CEX2A	*/
+#define REP88_ERROR_OPERAND	     0x84	/* CEX2A	*/
+#define REP88_ERROR_OPERAND_EVEN_MOD 0x85	/* CEX2A	*/
+
+static inline int convert_error(struct zcrypt_device *zdev,
+				struct ap_message *reply)
+{
+	struct error_hdr *ehdr = reply->message;
+
+	PRINTK("Hardware error : Type %02x Message Header: %08x%08x\n",
+	       ehdr->type, *(unsigned int *) reply->message,
+	       *(unsigned int *) (reply->message + 4));
+
+	switch (ehdr->reply_code) {
+	case REP82_ERROR_OPERAND_INVALID:
+	case REP82_ERROR_OPERAND_SIZE:
+	case REP82_ERROR_EVEN_MOD_IN_OPND:
+	case REP88_ERROR_MESSAGE_MALFORMD:
+	//   REP88_ERROR_INVALID_KEY		// '82' CEX2A
+	//   REP88_ERROR_OPERAND		// '84' CEX2A
+	//   REP88_ERROR_OPERAND_EVEN_MOD	// '85' CEX2A
+		/* Invalid input data. */
+		return -EINVAL;
+	case REP82_ERROR_MESSAGE_TYPE:
+	//   REP88_ERROR_MESSAGE_TYPE		// '20' CEX2A
+		/**
+		 * To sent a message of the wrong type is a bug in the
+		 * device driver. Warn about it, disable the device
+		 * and then repeat the request.
+		 */
+		WARN_ON(1);
+		zdev->online = 0;
+		return -EAGAIN;
+	case REP82_ERROR_TRANSPORT_FAIL:
+	case REP82_ERROR_MACHINE_FAILURE:
+	//   REP88_ERROR_MODULE_FAILURE		// '10' CEX2A
+		/* If a card fails disable it and repeat the request. */
+		zdev->online = 0;
+		return -EAGAIN;
+	default:
+		PRINTKW("unknown type %02x reply code = %d\n",
+			ehdr->type, ehdr->reply_code);
+		zdev->online = 0;
+		return -EAGAIN;	/* repeat the request on a different device. */
+	}
+}
+
+#endif /* _ZCRYPT_ERROR_H_ */