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

/*

 *  linux/drivers/s390/crypto/zcrypt_cex2a.c

 *

 *  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>

 *				  Ralph Wuerthner <rwuerthn@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.

 */

#include <linux/module.h>

#include <linux/init.h>

#include <linux/err.h>

#include <asm/atomic.h>

#include <asm/uaccess.h>

#include "ap_bus.h"

#include "zcrypt_api.h"

#include "zcrypt_error.h"

#include "zcrypt_cex2a.h"

#define CEX2A_MIN_MOD_SIZE	  1	/*    8 bits	*/

#define CEX2A_MAX_MOD_SIZE	256	/* 2048 bits	*/

#define CEX2A_SPEED_RATING	970

#define CEX2A_MAX_MESSAGE_SIZE	0x390	/* sizeof(struct type50_crb2_msg)    */

#define CEX2A_MAX_RESPONSE_SIZE 0x110	/* max outputdatalength + type80_hdr */

#define CEX2A_CLEANUP_TIME	(15*HZ)

static struct ap_device_id zcrypt_cex2a_ids[] = {

	{ AP_DEVICE(AP_DEVICE_TYPE_CEX2A) },

	{ /* end of list */ },

};

#ifndef CONFIG_ZCRYPT_MONOLITHIC

MODULE_DEVICE_TABLE(ap, zcrypt_cex2a_ids);

MODULE_AUTHOR("IBM Corporation");

MODULE_DESCRIPTION("CEX2A Cryptographic Coprocessor device driver, "

		   "Copyright 2001, 2006 IBM Corporation");

MODULE_LICENSE("GPL");

#endif

static int zcrypt_cex2a_probe(struct ap_device *ap_dev);

static void zcrypt_cex2a_remove(struct ap_device *ap_dev);

static void zcrypt_cex2a_receive(struct ap_device *, struct ap_message *,

				 struct ap_message *);

static struct ap_driver zcrypt_cex2a_driver = {

	.probe = zcrypt_cex2a_probe,

	.remove = zcrypt_cex2a_remove,

	.receive = zcrypt_cex2a_receive,

	.ids = zcrypt_cex2a_ids,

};

/**

 * Convert a ICAMEX message to a type50 MEX message.

 *

 * @zdev: crypto device pointer

 * @zreq: crypto request pointer

 * @mex: pointer to user input data

 *

 * Returns 0 on success or -EFAULT.

 */

static int ICAMEX_msg_to_type50MEX_msg(struct zcrypt_device *zdev,

				       struct ap_message *ap_msg,

				       struct ica_rsa_modexpo *mex)

{

	unsigned char *mod, *exp, *inp;

	int mod_len;

	mod_len = mex->inputdatalength;

	if (mod_len <= 128) {

		struct type50_meb1_msg *meb1 = ap_msg->message;

		memset(meb1, 0, sizeof(*meb1));

		ap_msg->length = sizeof(*meb1);

		meb1->header.msg_type_code = TYPE50_TYPE_CODE;

		meb1->header.msg_len = sizeof(*meb1);

		meb1->keyblock_type = TYPE50_MEB1_FMT;

		mod = meb1->modulus + sizeof(meb1->modulus) - mod_len;

		exp = meb1->exponent + sizeof(meb1->exponent) - mod_len;

		inp = meb1->message + sizeof(meb1->message) - mod_len;

	} else {

		struct type50_meb2_msg *meb2 = ap_msg->message;

		memset(meb2, 0, sizeof(*meb2));

		ap_msg->length = sizeof(*meb2);

		meb2->header.msg_type_code = TYPE50_TYPE_CODE;

		meb2->header.msg_len = sizeof(*meb2);

		meb2->keyblock_type = TYPE50_MEB2_FMT;

		mod = meb2->modulus + sizeof(meb2->modulus) - mod_len;

		exp = meb2->exponent + sizeof(meb2->exponent) - mod_len;

		inp = meb2->message + sizeof(meb2->message) - mod_len;

	}

	if (copy_from_user(mod, mex->n_modulus, mod_len) ||

	    copy_from_user(exp, mex->b_key, mod_len) ||

	    copy_from_user(inp, mex->inputdata, mod_len))

		return -EFAULT;

	return 0;

}

/**

 * Convert a ICACRT message to a type50 CRT message.

 *

 * @zdev: crypto device pointer

 * @zreq: crypto request pointer

 * @crt: pointer to user input data

 *

 * Returns 0 on success or -EFAULT.

 */

static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,

				       struct ap_message *ap_msg,

				       struct ica_rsa_modexpo_crt *crt)

{

	int mod_len, short_len, long_len, long_offset;

	unsigned char *p, *q, *dp, *dq, *u, *inp;

	mod_len = crt->inputdatalength;

	short_len = mod_len / 2;

	long_len = mod_len / 2 + 8;

	/*

	 * CEX2A cannot handle p, dp, or U > 128 bytes.

	 * If we have one of these, we need to do extra checking.

	 */

	if (long_len > 128) {

		/*

		 * zcrypt_rsa_crt already checked for the leading

		 * zeroes of np_prime, bp_key and u_mult_inc.

		 */

		long_offset = long_len - 128;

		long_len = 128;

	} else

		long_offset = 0;

	/*

	 * Instead of doing extra work for p, dp, U > 64 bytes, we'll just use

	 * the larger message structure.

	 */

	if (long_len <= 64) {

		struct type50_crb1_msg *crb1 = ap_msg->message;

		memset(crb1, 0, sizeof(*crb1));

		ap_msg->length = sizeof(*crb1);

		crb1->header.msg_type_code = TYPE50_TYPE_CODE;

		crb1->header.msg_len = sizeof(*crb1);

		crb1->keyblock_type = TYPE50_CRB1_FMT;

		p = crb1->p + sizeof(crb1->p) - long_len;

		q = crb1->q + sizeof(crb1->q) - short_len;

		dp = crb1->dp + sizeof(crb1->dp) - long_len;

		dq = crb1->dq + sizeof(crb1->dq) - short_len;

		u = crb1->u + sizeof(crb1->u) - long_len;

		inp = crb1->message + sizeof(crb1->message) - mod_len;

	} else {

		struct type50_crb2_msg *crb2 = ap_msg->message;

		memset(crb2, 0, sizeof(*crb2));

		ap_msg->length = sizeof(*crb2);

		crb2->header.msg_type_code = TYPE50_TYPE_CODE;

		crb2->header.msg_len = sizeof(*crb2);

		crb2->keyblock_type = TYPE50_CRB2_FMT;

		p = crb2->p + sizeof(crb2->p) - long_len;

		q = crb2->q + sizeof(crb2->q) - short_len;

		dp = crb2->dp + sizeof(crb2->dp) - long_len;

		dq = crb2->dq + sizeof(crb2->dq) - short_len;

		u = crb2->u + sizeof(crb2->u) - long_len;

		inp = crb2->message + sizeof(crb2->message) - mod_len;

	}

	if (copy_from_user(p, crt->np_prime + long_offset, long_len) ||

	    copy_from_user(q, crt->nq_prime, short_len) ||

	    copy_from_user(dp, crt->bp_key + long_offset, long_len) ||

	    copy_from_user(dq, crt->bq_key, short_len) ||

	    copy_from_user(u, crt->u_mult_inv + long_offset, long_len) ||

	    copy_from_user(inp, crt->inputdata, mod_len))

		return -EFAULT;

	return 0;

}

/**

 * Copy results from a type 80 reply message back to user space.

 *

 * @zdev: crypto device pointer

 * @reply: reply AP message.

 * @data: pointer to user output data

 * @length: size of user output data

 *

 * Returns 0 on success or -EFAULT.

 */

static int convert_type80(struct zcrypt_device *zdev,

			  struct ap_message *reply,

			  char __user *outputdata,

			  unsigned int outputdatalength)

{

	struct type80_hdr *t80h = reply->message;

	unsigned char *data;

	if (t80h->len < sizeof(*t80h) + outputdatalength) {

		/* The result is too short, the CEX2A card may not do that.. */

		zdev->online = 0;

		return -EAGAIN;	/* repeat the request on a different device. */

	}

	BUG_ON(t80h->len > CEX2A_MAX_RESPONSE_SIZE);

	data = reply->message + t80h->len - outputdatalength;

	if (copy_to_user(outputdata, data, outputdatalength))

		return -EFAULT;

	return 0;

}

static int convert_response(struct zcrypt_device *zdev,

			    struct ap_message *reply,

			    char __user *outputdata,

			    unsigned int outputdatalength)

{

	/* Response type byte is the second byte in the response. */

	switch (((unsigned char *) reply->message)[1]) {

	case TYPE82_RSP_CODE:

	case TYPE88_RSP_CODE:

		return convert_error(zdev, reply);

	case TYPE80_RSP_CODE:

		return convert_type80(zdev, reply,

				      outputdata, outputdatalength);

	default: /* Unknown response type, this should NEVER EVER happen */

		PRINTK("Unrecognized Message Header: %08x%08x\n",

		       *(unsigned int *) reply->message,

		       *(unsigned int *) (reply->message+4));

		zdev->online = 0;

		return -EAGAIN;	/* repeat the request on a different device. */

	}

}

/**

 * This function is called from the AP bus code after a crypto request

 * "msg" has finished with the reply message "reply".

 * It is called from tasklet context.

 * @ap_dev: pointer to the AP device

 * @msg: pointer to the AP message

 * @reply: pointer to the AP reply message

 */

static void zcrypt_cex2a_receive(struct ap_device *ap_dev,

				 struct ap_message *msg,

				 struct ap_message *reply)

{

	static struct error_hdr error_reply = {

		.type = TYPE82_RSP_CODE,

		.reply_code = REP82_ERROR_MACHINE_FAILURE,

	};

	struct type80_hdr *t80h = reply->message;

	int length;

	/* Copy the reply message to the request message buffer. */

	if (IS_ERR(reply))

		memcpy(msg->message, &error_reply, sizeof(error_reply));

	else if (t80h->type == TYPE80_RSP_CODE) {

		length = min(CEX2A_MAX_RESPONSE_SIZE, (int) t80h->len);

		memcpy(msg->message, reply->message, length);

	} else

		memcpy(msg->message, reply->message, sizeof error_reply);

	complete((struct completion *) msg->private);

}

static atomic_t zcrypt_step = ATOMIC_INIT(0);

/**

 * The request distributor calls this function if it picked the CEX2A

 * device to handle a modexpo request.

 * @zdev: pointer to zcrypt_device structure that identifies the

 *	  CEX2A device to the request distributor

 * @mex: pointer to the modexpo request buffer

 */

static long zcrypt_cex2a_modexpo(struct zcrypt_device *zdev,

				 struct ica_rsa_modexpo *mex)

{

	struct ap_message ap_msg;

	struct completion work;

	int rc;

	ap_msg.message = (void *) kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);

	if (!ap_msg.message)

		return -ENOMEM;

	ap_msg.psmid = (((unsigned long long) current->pid) << 32) +

				atomic_inc_return(&zcrypt_step);

	ap_msg.private = &work;

	rc = ICAMEX_msg_to_type50MEX_msg(zdev, &ap_msg, mex);

	if (rc)

		goto out_free;

	init_completion(&work);

	ap_queue_message(zdev->ap_dev, &ap_msg);

	rc = wait_for_completion_interruptible_timeout(

				&work, CEX2A_CLEANUP_TIME);

	if (rc > 0)

		rc = convert_response(zdev, &ap_msg, mex->outputdata,

				      mex->outputdatalength);

	else {

		/* Signal pending or message timed out. */

		ap_cancel_message(zdev->ap_dev, &ap_msg);

		if (rc == 0)

			/* Message timed out. */

			rc = -ETIME;

	}

out_free:

	kfree(ap_msg.message);

	return rc;

}

/**

 * The request distributor calls this function if it picked the CEX2A

 * device to handle a modexpo_crt request.

 * @zdev: pointer to zcrypt_device structure that identifies the

 *	  CEX2A device to the request distributor

 * @crt: pointer to the modexpoc_crt request buffer

 */

static long zcrypt_cex2a_modexpo_crt(struct zcrypt_device *zdev,

				     struct ica_rsa_modexpo_crt *crt)

{

	struct ap_message ap_msg;

	struct completion work;

	int rc;

	ap_msg.message = (void *) kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL);

	if (!ap_msg.message)

		return -ENOMEM;

	ap_msg.psmid = (((unsigned long long) current->pid) << 32) +

				atomic_inc_return(&zcrypt_step);

	ap_msg.private = &work;

	rc = ICACRT_msg_to_type50CRT_msg(zdev, &ap_msg, crt);

	if (rc)

		goto out_free;

	init_completion(&work);

	ap_queue_message(zdev->ap_dev, &ap_msg);

	rc = wait_for_completion_interruptible_timeout(

				&work, CEX2A_CLEANUP_TIME);

	if (rc > 0)

		rc = convert_response(zdev, &ap_msg, crt->outputdata,

				      crt->outputdatalength);

	else {

		/* Signal pending or message timed out. */

		ap_cancel_message(zdev->ap_dev, &ap_msg);

		if (rc == 0)

			/* Message timed out. */

			rc = -ETIME;

	}

out_free:

	kfree(ap_msg.message);

	return rc;

}

/**

 * The crypto operations for a CEX2A card.

 */

static struct zcrypt_ops zcrypt_cex2a_ops = {

	.rsa_modexpo = zcrypt_cex2a_modexpo,

	.rsa_modexpo_crt = zcrypt_cex2a_modexpo_crt,

};

/**

 * Probe function for CEX2A cards. It always accepts the AP device

 * since the bus_match already checked the hardware type.

 * @ap_dev: pointer to the AP device.

 */

static int zcrypt_cex2a_probe(struct ap_device *ap_dev)

{

	struct zcrypt_device *zdev;

	int rc;

	zdev = zcrypt_device_alloc(CEX2A_MAX_RESPONSE_SIZE);

	if (!zdev)

		return -ENOMEM;

	zdev->ap_dev = ap_dev;

	zdev->ops = &zcrypt_cex2a_ops;

	zdev->online = 1;

	zdev->user_space_type = ZCRYPT_CEX2A;

	zdev->type_string = "CEX2A";

	zdev->min_mod_size = CEX2A_MIN_MOD_SIZE;

	zdev->max_mod_size = CEX2A_MAX_MOD_SIZE;

	zdev->short_crt = 1;

	zdev->speed_rating = CEX2A_SPEED_RATING;

	ap_dev->reply = &zdev->reply;

	ap_dev->private = zdev;

	rc = zcrypt_device_register(zdev);

	if (rc)

		goto out_free;

	return 0;

out_free:

	ap_dev->private = NULL;

	zcrypt_device_free(zdev);

	return rc;

}

/**

 * This is called to remove the extended CEX2A driver information

 * if an AP device is removed.

 */

static void zcrypt_cex2a_remove(struct ap_device *ap_dev)

{

	struct zcrypt_device *zdev = ap_dev->private;

	zcrypt_device_unregister(zdev);

}

int __init zcrypt_cex2a_init(void)

{

	return ap_driver_register(&zcrypt_cex2a_driver, THIS_MODULE, "cex2a");

}

void __exit zcrypt_cex2a_exit(void)

{

	ap_driver_unregister(&zcrypt_cex2a_driver);

}

#ifndef CONFIG_ZCRYPT_MONOLITHIC

module_init(zcrypt_cex2a_init);

module_exit(zcrypt_cex2a_exit);

#endif

/*

 *  linux/drivers/s390/crypto/zcrypt_cex2a.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_CEX2A_H_

#define _ZCRYPT_CEX2A_H_

/**

 * The type 50 message family is associated with a CEX2A card.

 *

 * The four members of the family are described below.

 *

 * Note that all unsigned char arrays are right-justified and left-padded

 * with zeroes.

 *

 * Note that all reserved fields must be zeroes.

 */

struct type50_hdr {

	unsigned char	reserved1;

	unsigned char	msg_type_code;	/* 0x50 */

	unsigned short	msg_len;

	unsigned char	reserved2;

	unsigned char	ignored;

	unsigned short	reserved3;

} __attribute__((packed));

#define TYPE50_TYPE_CODE	0x50

#define TYPE50_MEB1_FMT		0x0001

#define TYPE50_MEB2_FMT		0x0002

#define TYPE50_CRB1_FMT		0x0011

#define TYPE50_CRB2_FMT		0x0012

/* Mod-Exp, with a small modulus */

struct type50_meb1_msg {

	struct type50_hdr header;

	unsigned short	keyblock_type;	/* 0x0001 */

	unsigned char	reserved[6];

	unsigned char	exponent[128];

	unsigned char	modulus[128];

	unsigned char	message[128];

} __attribute__((packed));

/* Mod-Exp, with a large modulus */

struct type50_meb2_msg {

	struct type50_hdr header;

	unsigned short	keyblock_type;	/* 0x0002 */

	unsigned char	reserved[6];

	unsigned char	exponent[256];

	unsigned char	modulus[256];

	unsigned char	message[256];

} __attribute__((packed));

/* CRT, with a small modulus */

struct type50_crb1_msg {

	struct type50_hdr header;

	unsigned short	keyblock_type;	/* 0x0011 */

	unsigned char	reserved[6];

	unsigned char	p[64];

	unsigned char	q[64];

	unsigned char	dp[64];

	unsigned char	dq[64];

	unsigned char	u[64];

	unsigned char	message[128];

} __attribute__((packed));

/* CRT, with a large modulus */

struct type50_crb2_msg {

	struct type50_hdr header;

	unsigned short	keyblock_type;	/* 0x0012 */

	unsigned char	reserved[6];

	unsigned char	p[128];

	unsigned char	q[128];

	unsigned char	dp[128];

	unsigned char	dq[128];

	unsigned char	u[128];

	unsigned char	message[256];

} __attribute__((packed));

/**

 * The type 80 response family is associated with a CEX2A card.

 *

 * Note that all unsigned char arrays are right-justified and left-padded

 * with zeroes.

 *

 * Note that all reserved fields must be zeroes.

 */

#define TYPE80_RSP_CODE 0x80

struct type80_hdr {

	unsigned char	reserved1;

	unsigned char	type;		/* 0x80 */

	unsigned short	len;

	unsigned char	code;		/* 0x00 */

	unsigned char	reserved2[3];

	unsigned char	reserved3[8];

} __attribute__((packed));

int zcrypt_cex2a_init(void);

void zcrypt_cex2a_exit(void);

#endif /* _ZCRYPT_CEX2A_H_ */

/*

 *  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_ */

/*

 *  linux/drivers/s390/crypto/zcrypt_pcica.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_PCICA_H_

#define _ZCRYPT_PCICA_H_

/**

 * The type 4 message family is associated with a PCICA card.

 *

 * The four members of the family are described below.

 *

 * Note that all unsigned char arrays are right-justified and left-padded

 * with zeroes.

 *

 * Note that all reserved fields must be zeroes.

 */