drivers/s390/crypto/zcrypt_cex2a.c - kernel/msm-4.19 - Gitiles

 /*
  *  zcrypt 2.1.0
  *
  *  Copyright IBM Corp. 2001, 2012
  *  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>
  *  MSGTYPE restruct:		  Holger Dengler <hd@linux.vnet.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/slab.h>
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/atomic.h>
 #include <asm/uaccess.h>
 #include <linux/mod_devicetable.h>

 #include "ap_bus.h"
 #include "zcrypt_api.h"
 #include "zcrypt_error.h"
 #include "zcrypt_cex2a.h"
 #include "zcrypt_msgtype50.h"

 #define CEX2A_MIN_MOD_SIZE	  1	/*    8 bits	*/
 #define CEX2A_MAX_MOD_SIZE	256	/* 2048 bits	*/
 #define CEX3A_MIN_MOD_SIZE	CEX2A_MIN_MOD_SIZE
 #define CEX3A_MAX_MOD_SIZE	512	/* 4096 bits	*/

 #define CEX2A_MAX_MESSAGE_SIZE	0x390	/* sizeof(struct type50_crb2_msg)    */
 #define CEX2A_MAX_RESPONSE_SIZE 0x110	/* max outputdatalength + type80_hdr */

 #define CEX3A_MAX_RESPONSE_SIZE	0x210	/* 512 bit modulus
 					 * (max outputdatalength) +
 					 * type80_hdr*/
 #define CEX3A_MAX_MESSAGE_SIZE	sizeof(struct type50_crb3_msg)

 #define CEX2A_CLEANUP_TIME	(15*HZ)
 #define CEX3A_CLEANUP_TIME	CEX2A_CLEANUP_TIME

 MODULE_AUTHOR("IBM Corporation");
 MODULE_DESCRIPTION("CEX2A Cryptographic Coprocessor device driver, " \
 		   "Copyright IBM Corp. 2001, 2012");
 MODULE_LICENSE("GPL");

 static struct ap_device_id zcrypt_cex2a_card_ids[] = {
 	{ .dev_type = AP_DEVICE_TYPE_CEX2A,
 	  .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
 	{ .dev_type = AP_DEVICE_TYPE_CEX3A,
 	  .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
 	{ /* end of list */ },
 };

 MODULE_DEVICE_TABLE(ap, zcrypt_cex2a_card_ids);

 static struct ap_device_id zcrypt_cex2a_queue_ids[] = {
 	{ .dev_type = AP_DEVICE_TYPE_CEX2A,
 	  .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
 	{ .dev_type = AP_DEVICE_TYPE_CEX3A,
 	  .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
 	{ /* end of list */ },
 };

 MODULE_DEVICE_TABLE(ap, zcrypt_cex2a_queue_ids);

 /**
  * Probe function for CEX2A card devices. It always accepts the AP device
  * since the bus_match already checked the card type.
  * @ap_dev: pointer to the AP device.
  */
 static int zcrypt_cex2a_card_probe(struct ap_device *ap_dev)
 {
 	/*
 	 * Normalized speed ratings per crypto adapter
 	 * MEX_1k, MEX_2k, MEX_4k, CRT_1k, CRT_2k, CRT_4k, RNG, SECKEY
 	 */
 	static const int CEX2A_SPEED_IDX[] = {
 		800, 1000, 2000,  900, 1200, 2400, 0, 0};
 	static const int CEX3A_SPEED_IDX[] = {
 		400,  500, 1000,  450,	550, 1200, 0, 0};

 	struct ap_card *ac = to_ap_card(&ap_dev->device);
 	struct zcrypt_card *zc;
 	int rc = 0;

 	zc = zcrypt_card_alloc();
 	if (!zc)
 		return -ENOMEM;
 	zc->card = ac;
 	ac->private = zc;

 	if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX2A) {
 		zc->min_mod_size = CEX2A_MIN_MOD_SIZE;
 		zc->max_mod_size = CEX2A_MAX_MOD_SIZE;
 		memcpy(zc->speed_rating, CEX2A_SPEED_IDX,
 		       sizeof(CEX2A_SPEED_IDX));
 		zc->max_exp_bit_length = CEX2A_MAX_MOD_SIZE;
 		zc->type_string = "CEX2A";
 		zc->user_space_type = ZCRYPT_CEX2A;
 	} else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX3A) {
 		zc->min_mod_size = CEX2A_MIN_MOD_SIZE;
 		zc->max_mod_size = CEX2A_MAX_MOD_SIZE;
 		zc->max_exp_bit_length = CEX2A_MAX_MOD_SIZE;
 		if (ap_test_bit(&ac->functions, AP_FUNC_MEX4K) &&
 		    ap_test_bit(&ac->functions, AP_FUNC_CRT4K)) {
 			zc->max_mod_size = CEX3A_MAX_MOD_SIZE;
 			zc->max_exp_bit_length = CEX3A_MAX_MOD_SIZE;
 		}
 		memcpy(zc->speed_rating, CEX3A_SPEED_IDX,
 		       sizeof(CEX3A_SPEED_IDX));
 		zc->type_string = "CEX3A";
 		zc->user_space_type = ZCRYPT_CEX3A;
 	} else {
 		zcrypt_card_free(zc);
 		return -ENODEV;
 	}
 	zc->online = 1;

 	rc = zcrypt_card_register(zc);
 	if (rc) {
 		ac->private = NULL;
 		zcrypt_card_free(zc);
 	}

 	return rc;
 }

 /**
  * This is called to remove the CEX2A card driver information
  * if an AP card device is removed.
  */
 static void zcrypt_cex2a_card_remove(struct ap_device *ap_dev)
 {
 	struct zcrypt_card *zc = to_ap_card(&ap_dev->device)->private;

 	if (zc)
 		zcrypt_card_unregister(zc);
 }

 static struct ap_driver zcrypt_cex2a_card_driver = {
 	.probe = zcrypt_cex2a_card_probe,
 	.remove = zcrypt_cex2a_card_remove,
 	.ids = zcrypt_cex2a_card_ids,
 };

 /**
  * Probe function for CEX2A queue devices. It always accepts the AP device
  * since the bus_match already checked the queue type.
  * @ap_dev: pointer to the AP device.
  */
 static int zcrypt_cex2a_queue_probe(struct ap_device *ap_dev)
 {
 	struct ap_queue *aq = to_ap_queue(&ap_dev->device);
 	struct zcrypt_queue *zq = NULL;
 	int rc;

 	switch (ap_dev->device_type) {
 	case AP_DEVICE_TYPE_CEX2A:
 		zq = zcrypt_queue_alloc(CEX2A_MAX_RESPONSE_SIZE);
 		if (!zq)
 			return -ENOMEM;
 		break;
 	case AP_DEVICE_TYPE_CEX3A:
 		zq = zcrypt_queue_alloc(CEX3A_MAX_RESPONSE_SIZE);
 		if (!zq)
 			return -ENOMEM;
 		break;
 	}
 	if (!zq)
 		return -ENODEV;
 	zq->ops = zcrypt_msgtype(MSGTYPE50_NAME, MSGTYPE50_VARIANT_DEFAULT);
 	zq->queue = aq;
 	zq->online = 1;
 	atomic_set(&zq->load, 0);
 	ap_queue_init_reply(aq, &zq->reply);
 	aq->request_timeout = CEX2A_CLEANUP_TIME,
 	aq->private = zq;
 	rc = zcrypt_queue_register(zq);
 	if (rc) {
 		aq->private = NULL;
 		zcrypt_queue_free(zq);
 	}

 	return rc;
 }

 /**
  * This is called to remove the CEX2A queue driver information
  * if an AP queue device is removed.
  */
 static void zcrypt_cex2a_queue_remove(struct ap_device *ap_dev)
 {
 	struct ap_queue *aq = to_ap_queue(&ap_dev->device);
 	struct zcrypt_queue *zq = aq->private;

 	ap_queue_remove(aq);
 	if (zq)
 		zcrypt_queue_unregister(zq);
 }

 static struct ap_driver zcrypt_cex2a_queue_driver = {
 	.probe = zcrypt_cex2a_queue_probe,
 	.remove = zcrypt_cex2a_queue_remove,
 	.suspend = ap_queue_suspend,
 	.resume = ap_queue_resume,
 	.ids = zcrypt_cex2a_queue_ids,
 };

 int __init zcrypt_cex2a_init(void)
 {
 	int rc;

 	rc = ap_driver_register(&zcrypt_cex2a_card_driver,
 				THIS_MODULE, "cex2acard");
 	if (rc)
 		return rc;

 	rc = ap_driver_register(&zcrypt_cex2a_queue_driver,
 				THIS_MODULE, "cex2aqueue");
 	if (rc)
 		ap_driver_unregister(&zcrypt_cex2a_card_driver);

 	return rc;
 }

 void __exit zcrypt_cex2a_exit(void)
 {
 	ap_driver_unregister(&zcrypt_cex2a_queue_driver);
 	ap_driver_unregister(&zcrypt_cex2a_card_driver);
 }

 module_init(zcrypt_cex2a_init);
 module_exit(zcrypt_cex2a_exit);
	/*
	* zcrypt 2.1.0
	*
	* Copyright IBM Corp. 2001, 2012
	* 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>
	* MSGTYPE restruct: Holger Dengler <hd@linux.vnet.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/slab.h>
	#include <linux/init.h>
	#include <linux/err.h>
	#include <linux/atomic.h>
	#include <asm/uaccess.h>
	#include <linux/mod_devicetable.h>

	#include "ap_bus.h"
	#include "zcrypt_api.h"
	#include "zcrypt_error.h"
	#include "zcrypt_cex2a.h"
	#include "zcrypt_msgtype50.h"

	#define CEX2A_MIN_MOD_SIZE 1 /* 8 bits */
	#define CEX2A_MAX_MOD_SIZE 256 /* 2048 bits */
	#define CEX3A_MIN_MOD_SIZE CEX2A_MIN_MOD_SIZE
	#define CEX3A_MAX_MOD_SIZE 512 /* 4096 bits */

	#define CEX2A_MAX_MESSAGE_SIZE 0x390 /* sizeof(struct type50_crb2_msg) */
	#define CEX2A_MAX_RESPONSE_SIZE 0x110 /* max outputdatalength + type80_hdr */

	#define CEX3A_MAX_RESPONSE_SIZE 0x210 /* 512 bit modulus
	* (max outputdatalength) +
	* type80_hdr*/
	#define CEX3A_MAX_MESSAGE_SIZE sizeof(struct type50_crb3_msg)

	#define CEX2A_CLEANUP_TIME (15*HZ)
	#define CEX3A_CLEANUP_TIME CEX2A_CLEANUP_TIME

	MODULE_AUTHOR("IBM Corporation");
	MODULE_DESCRIPTION("CEX2A Cryptographic Coprocessor device driver, " \
	"Copyright IBM Corp. 2001, 2012");
	MODULE_LICENSE("GPL");

	static struct ap_device_id zcrypt_cex2a_card_ids[] = {
	{ .dev_type = AP_DEVICE_TYPE_CEX2A,
	.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
	{ .dev_type = AP_DEVICE_TYPE_CEX3A,
	.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
	{ /* end of list */ },
	};

	MODULE_DEVICE_TABLE(ap, zcrypt_cex2a_card_ids);

	static struct ap_device_id zcrypt_cex2a_queue_ids[] = {
	{ .dev_type = AP_DEVICE_TYPE_CEX2A,
	.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
	{ .dev_type = AP_DEVICE_TYPE_CEX3A,
	.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
	{ /* end of list */ },
	};

	MODULE_DEVICE_TABLE(ap, zcrypt_cex2a_queue_ids);

	/**
	* Probe function for CEX2A card devices. It always accepts the AP device
	* since the bus_match already checked the card type.
	* @ap_dev: pointer to the AP device.
	*/
	static int zcrypt_cex2a_card_probe(struct ap_device *ap_dev)
	{
	/*
	* Normalized speed ratings per crypto adapter
	* MEX_1k, MEX_2k, MEX_4k, CRT_1k, CRT_2k, CRT_4k, RNG, SECKEY
	*/
	static const int CEX2A_SPEED_IDX[] = {
	800, 1000, 2000, 900, 1200, 2400, 0, 0};
	static const int CEX3A_SPEED_IDX[] = {
	400, 500, 1000, 450, 550, 1200, 0, 0};

	struct ap_card *ac = to_ap_card(&ap_dev->device);
	struct zcrypt_card *zc;
	int rc = 0;

	zc = zcrypt_card_alloc();
	if (!zc)
	return -ENOMEM;
	zc->card = ac;
	ac->private = zc;

	if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX2A) {
	zc->min_mod_size = CEX2A_MIN_MOD_SIZE;
	zc->max_mod_size = CEX2A_MAX_MOD_SIZE;
	memcpy(zc->speed_rating, CEX2A_SPEED_IDX,
	sizeof(CEX2A_SPEED_IDX));
	zc->max_exp_bit_length = CEX2A_MAX_MOD_SIZE;
	zc->type_string = "CEX2A";
	zc->user_space_type = ZCRYPT_CEX2A;
	} else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX3A) {
	zc->min_mod_size = CEX2A_MIN_MOD_SIZE;
	zc->max_mod_size = CEX2A_MAX_MOD_SIZE;
	zc->max_exp_bit_length = CEX2A_MAX_MOD_SIZE;
	if (ap_test_bit(&ac->functions, AP_FUNC_MEX4K) &&
	ap_test_bit(&ac->functions, AP_FUNC_CRT4K)) {
	zc->max_mod_size = CEX3A_MAX_MOD_SIZE;
	zc->max_exp_bit_length = CEX3A_MAX_MOD_SIZE;
	}
	memcpy(zc->speed_rating, CEX3A_SPEED_IDX,
	sizeof(CEX3A_SPEED_IDX));
	zc->type_string = "CEX3A";
	zc->user_space_type = ZCRYPT_CEX3A;
	} else {
	zcrypt_card_free(zc);
	return -ENODEV;
	}
	zc->online = 1;

	rc = zcrypt_card_register(zc);
	if (rc) {
	ac->private = NULL;
	zcrypt_card_free(zc);
	}

	return rc;
	}

	/**
	* This is called to remove the CEX2A card driver information
	* if an AP card device is removed.
	*/
	static void zcrypt_cex2a_card_remove(struct ap_device *ap_dev)
	{
	struct zcrypt_card *zc = to_ap_card(&ap_dev->device)->private;

	if (zc)
	zcrypt_card_unregister(zc);
	}

	static struct ap_driver zcrypt_cex2a_card_driver = {
	.probe = zcrypt_cex2a_card_probe,
	.remove = zcrypt_cex2a_card_remove,
	.ids = zcrypt_cex2a_card_ids,
	};

	/**
	* Probe function for CEX2A queue devices. It always accepts the AP device
	* since the bus_match already checked the queue type.
	* @ap_dev: pointer to the AP device.
	*/
	static int zcrypt_cex2a_queue_probe(struct ap_device *ap_dev)
	{
	struct ap_queue *aq = to_ap_queue(&ap_dev->device);
	struct zcrypt_queue *zq = NULL;
	int rc;

	switch (ap_dev->device_type) {
	case AP_DEVICE_TYPE_CEX2A:
	zq = zcrypt_queue_alloc(CEX2A_MAX_RESPONSE_SIZE);
	if (!zq)
	return -ENOMEM;
	break;
	case AP_DEVICE_TYPE_CEX3A:
	zq = zcrypt_queue_alloc(CEX3A_MAX_RESPONSE_SIZE);
	if (!zq)
	return -ENOMEM;
	break;
	}
	if (!zq)
	return -ENODEV;
	zq->ops = zcrypt_msgtype(MSGTYPE50_NAME, MSGTYPE50_VARIANT_DEFAULT);
	zq->queue = aq;
	zq->online = 1;
	atomic_set(&zq->load, 0);
	ap_queue_init_reply(aq, &zq->reply);
	aq->request_timeout = CEX2A_CLEANUP_TIME,
	aq->private = zq;
	rc = zcrypt_queue_register(zq);
	if (rc) {
	aq->private = NULL;
	zcrypt_queue_free(zq);
	}

	return rc;
	}

	/**
	* This is called to remove the CEX2A queue driver information
	* if an AP queue device is removed.
	*/
	static void zcrypt_cex2a_queue_remove(struct ap_device *ap_dev)
	{
	struct ap_queue *aq = to_ap_queue(&ap_dev->device);
	struct zcrypt_queue *zq = aq->private;

	ap_queue_remove(aq);
	if (zq)
	zcrypt_queue_unregister(zq);
	}

	static struct ap_driver zcrypt_cex2a_queue_driver = {
	.probe = zcrypt_cex2a_queue_probe,
	.remove = zcrypt_cex2a_queue_remove,
	.suspend = ap_queue_suspend,
	.resume = ap_queue_resume,
	.ids = zcrypt_cex2a_queue_ids,
	};

	int __init zcrypt_cex2a_init(void)
	{
	int rc;

	rc = ap_driver_register(&zcrypt_cex2a_card_driver,
	THIS_MODULE, "cex2acard");
	if (rc)
	return rc;

	rc = ap_driver_register(&zcrypt_cex2a_queue_driver,
	THIS_MODULE, "cex2aqueue");
	if (rc)
	ap_driver_unregister(&zcrypt_cex2a_card_driver);

	return rc;
	}

	void __exit zcrypt_cex2a_exit(void)
	{
	ap_driver_unregister(&zcrypt_cex2a_queue_driver);
	ap_driver_unregister(&zcrypt_cex2a_card_driver);
	}

	module_init(zcrypt_cex2a_init);
	module_exit(zcrypt_cex2a_exit);