drivers/s390/crypto/zcrypt_cex4.c - arm/linux - Git at Google

 /*
  *  Copyright IBM Corp. 2012
  *  Author(s): Holger Dengler <hd@linux.vnet.ibm.com>
  */

 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/atomic.h>
 #include <linux/uaccess.h>
 #include <linux/mod_devicetable.h>

 #include "ap_bus.h"
 #include "zcrypt_api.h"
 #include "zcrypt_msgtype6.h"
 #include "zcrypt_msgtype50.h"
 #include "zcrypt_error.h"
 #include "zcrypt_cex4.h"

 #define CEX4A_MIN_MOD_SIZE	  1	/*    8 bits	*/
 #define CEX4A_MAX_MOD_SIZE_2K	256	/* 2048 bits	*/
 #define CEX4A_MAX_MOD_SIZE_4K	512	/* 4096 bits	*/

 #define CEX4C_MIN_MOD_SIZE	 16	/*  256 bits	*/
 #define CEX4C_MAX_MOD_SIZE	512	/* 4096 bits	*/

 #define CEX4A_MAX_MESSAGE_SIZE	MSGTYPE50_CRB3_MAX_MSG_SIZE
 #define CEX4C_MAX_MESSAGE_SIZE	MSGTYPE06_MAX_MSG_SIZE

 /* Waiting time for requests to be processed.
  * Currently there are some types of request which are not deterministic.
  * But the maximum time limit managed by the stomper code is set to 60sec.
  * Hence we have to wait at least that time period.
  */
 #define CEX4_CLEANUP_TIME	(900*HZ)

 MODULE_AUTHOR("IBM Corporation");
 MODULE_DESCRIPTION("CEX4 Cryptographic Card device driver, " \
 		   "Copyright IBM Corp. 2012");
 MODULE_LICENSE("GPL");

 static struct ap_device_id zcrypt_cex4_card_ids[] = {
 	{ .dev_type = AP_DEVICE_TYPE_CEX4,
 	  .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
 	{ .dev_type = AP_DEVICE_TYPE_CEX5,
 	  .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
 	{ /* end of list */ },
 };

 MODULE_DEVICE_TABLE(ap, zcrypt_cex4_card_ids);

 static struct ap_device_id zcrypt_cex4_queue_ids[] = {
 	{ .dev_type = AP_DEVICE_TYPE_CEX4,
 	  .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
 	{ .dev_type = AP_DEVICE_TYPE_CEX5,
 	  .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
 	{ /* end of list */ },
 };

 MODULE_DEVICE_TABLE(ap, zcrypt_cex4_queue_ids);

 /**
  * Probe function for CEX4 card device. 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_cex4_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 CEX4A_SPEED_IDX[] = {
 		5,  6,	  59,  20, 115,  581,  0,  0};
 	static const int CEX5A_SPEED_IDX[] = {
 		3,  3,	   6,	8,  32,  218,  0,  0};
 	static const int CEX4C_SPEED_IDX[] = {
 		24,  25,   82,	41, 138, 1111, 79,  8};
 	static const int CEX5C_SPEED_IDX[] = {
 		10,  14,   23,	17,  45,  242, 63,  4};
 	static const int CEX4P_SPEED_IDX[] = {
 		142, 198, 1852, 203, 331, 1563,  0,  8};
 	static const int CEX5P_SPEED_IDX[] = {
 		49,  67,  131,	52,  85,  287,	0,  4};

 	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 (ap_test_bit(&ac->functions, AP_FUNC_ACCEL)) {
 		if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) {
 			zc->type_string = "CEX4A";
 			zc->user_space_type = ZCRYPT_CEX4;
 			memcpy(zc->speed_rating, CEX4A_SPEED_IDX,
 			       sizeof(CEX4A_SPEED_IDX));
 		} else {
 			zc->type_string = "CEX5A";
 			zc->user_space_type = ZCRYPT_CEX5;
 			memcpy(zc->speed_rating, CEX5A_SPEED_IDX,
 			       sizeof(CEX5A_SPEED_IDX));
 		}
 		zc->min_mod_size = CEX4A_MIN_MOD_SIZE;
 		if (ap_test_bit(&ac->functions, AP_FUNC_MEX4K) &&
 		    ap_test_bit(&ac->functions, AP_FUNC_CRT4K)) {
 			zc->max_mod_size = CEX4A_MAX_MOD_SIZE_4K;
 			zc->max_exp_bit_length =
 				CEX4A_MAX_MOD_SIZE_4K;
 		} else {
 			zc->max_mod_size = CEX4A_MAX_MOD_SIZE_2K;
 			zc->max_exp_bit_length =
 				CEX4A_MAX_MOD_SIZE_2K;
 		}
 	} else if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) {
 		if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) {
 			zc->type_string = "CEX4C";
 			/* wrong user space type, must be CEX4
 			 * just keep it for cca compatibility
 			 */
 			zc->user_space_type = ZCRYPT_CEX3C;
 			memcpy(zc->speed_rating, CEX4C_SPEED_IDX,
 			       sizeof(CEX4C_SPEED_IDX));
 		} else {
 			zc->type_string = "CEX5C";
 			/* wrong user space type, must be CEX5
 			 * just keep it for cca compatibility
 			 */
 			zc->user_space_type = ZCRYPT_CEX3C;
 			memcpy(zc->speed_rating, CEX5C_SPEED_IDX,
 			       sizeof(CEX5C_SPEED_IDX));
 		}
 		zc->min_mod_size = CEX4C_MIN_MOD_SIZE;
 		zc->max_mod_size = CEX4C_MAX_MOD_SIZE;
 		zc->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
 	} else if (ap_test_bit(&ac->functions, AP_FUNC_EP11)) {
 		if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) {
 			zc->type_string = "CEX4P";
 			zc->user_space_type = ZCRYPT_CEX4;
 			memcpy(zc->speed_rating, CEX4P_SPEED_IDX,
 			       sizeof(CEX4P_SPEED_IDX));
 		} else {
 			zc->type_string = "CEX5P";
 			zc->user_space_type = ZCRYPT_CEX5;
 			memcpy(zc->speed_rating, CEX5P_SPEED_IDX,
 			       sizeof(CEX5P_SPEED_IDX));
 		}
 		zc->min_mod_size = CEX4C_MIN_MOD_SIZE;
 		zc->max_mod_size = CEX4C_MAX_MOD_SIZE;
 		zc->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
 	} 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 CEX4 card driver information
  * if an AP card device is removed.
  */
 static void zcrypt_cex4_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_cex4_card_driver = {
 	.probe = zcrypt_cex4_card_probe,
 	.remove = zcrypt_cex4_card_remove,
 	.ids = zcrypt_cex4_card_ids,
 };

 /**
  * Probe function for CEX4 queue device. 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_cex4_queue_probe(struct ap_device *ap_dev)
 {
 	struct ap_queue *aq = to_ap_queue(&ap_dev->device);
 	struct zcrypt_queue *zq;
 	int rc;

 	if (ap_test_bit(&aq->card->functions, AP_FUNC_ACCEL)) {
 		zq = zcrypt_queue_alloc(CEX4A_MAX_MESSAGE_SIZE);
 		if (!zq)
 			return -ENOMEM;
 		zq->ops = zcrypt_msgtype(MSGTYPE50_NAME,
 					 MSGTYPE50_VARIANT_DEFAULT);
 	} else if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) {
 		zq = zcrypt_queue_alloc(CEX4C_MAX_MESSAGE_SIZE);
 		if (!zq)
 			return -ENOMEM;
 		zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
 					 MSGTYPE06_VARIANT_DEFAULT);
 	} else if (ap_test_bit(&aq->card->functions, AP_FUNC_EP11)) {
 		zq = zcrypt_queue_alloc(CEX4C_MAX_MESSAGE_SIZE);
 		if (!zq)
 			return -ENOMEM;
 		zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
 					 MSGTYPE06_VARIANT_EP11);
 	} else {
 		return -ENODEV;
 	}
 	zq->queue = aq;
 	zq->online = 1;
 	atomic_set(&zq->load, 0);
 	ap_queue_init_reply(aq, &zq->reply);
 	aq->request_timeout = CEX4_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 CEX4 queue driver information
  * if an AP queue device is removed.
  */
 static void zcrypt_cex4_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_cex4_queue_driver = {
 	.probe = zcrypt_cex4_queue_probe,
 	.remove = zcrypt_cex4_queue_remove,
 	.suspend = ap_queue_suspend,
 	.resume = ap_queue_resume,
 	.ids = zcrypt_cex4_queue_ids,
 };

 int __init zcrypt_cex4_init(void)
 {
 	int rc;

 	rc = ap_driver_register(&zcrypt_cex4_card_driver,
 				THIS_MODULE, "cex4card");
 	if (rc)
 		return rc;

 	rc = ap_driver_register(&zcrypt_cex4_queue_driver,
 				THIS_MODULE, "cex4queue");
 	if (rc)
 		ap_driver_unregister(&zcrypt_cex4_card_driver);

 	return rc;
 }

 void __exit zcrypt_cex4_exit(void)
 {
 	ap_driver_unregister(&zcrypt_cex4_queue_driver);
 	ap_driver_unregister(&zcrypt_cex4_card_driver);
 }

 module_init(zcrypt_cex4_init);
 module_exit(zcrypt_cex4_exit);
	/*
	* Copyright IBM Corp. 2012
	* Author(s): Holger Dengler <hd@linux.vnet.ibm.com>
	*/

	#include <linux/module.h>
	#include <linux/slab.h>
	#include <linux/init.h>
	#include <linux/err.h>
	#include <linux/atomic.h>
	#include <linux/uaccess.h>
	#include <linux/mod_devicetable.h>

	#include "ap_bus.h"
	#include "zcrypt_api.h"
	#include "zcrypt_msgtype6.h"
	#include "zcrypt_msgtype50.h"
	#include "zcrypt_error.h"
	#include "zcrypt_cex4.h"

	#define CEX4A_MIN_MOD_SIZE 1 /* 8 bits */
	#define CEX4A_MAX_MOD_SIZE_2K 256 /* 2048 bits */
	#define CEX4A_MAX_MOD_SIZE_4K 512 /* 4096 bits */

	#define CEX4C_MIN_MOD_SIZE 16 /* 256 bits */
	#define CEX4C_MAX_MOD_SIZE 512 /* 4096 bits */

	#define CEX4A_MAX_MESSAGE_SIZE MSGTYPE50_CRB3_MAX_MSG_SIZE
	#define CEX4C_MAX_MESSAGE_SIZE MSGTYPE06_MAX_MSG_SIZE

	/* Waiting time for requests to be processed.
	* Currently there are some types of request which are not deterministic.
	* But the maximum time limit managed by the stomper code is set to 60sec.
	* Hence we have to wait at least that time period.
	*/
	#define CEX4_CLEANUP_TIME (900*HZ)

	MODULE_AUTHOR("IBM Corporation");
	MODULE_DESCRIPTION("CEX4 Cryptographic Card device driver, " \
	"Copyright IBM Corp. 2012");
	MODULE_LICENSE("GPL");

	static struct ap_device_id zcrypt_cex4_card_ids[] = {
	{ .dev_type = AP_DEVICE_TYPE_CEX4,
	.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
	{ .dev_type = AP_DEVICE_TYPE_CEX5,
	.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
	{ /* end of list */ },
	};

	MODULE_DEVICE_TABLE(ap, zcrypt_cex4_card_ids);

	static struct ap_device_id zcrypt_cex4_queue_ids[] = {
	{ .dev_type = AP_DEVICE_TYPE_CEX4,
	.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
	{ .dev_type = AP_DEVICE_TYPE_CEX5,
	.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
	{ /* end of list */ },
	};

	MODULE_DEVICE_TABLE(ap, zcrypt_cex4_queue_ids);

	/**
	* Probe function for CEX4 card device. 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_cex4_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 CEX4A_SPEED_IDX[] = {
	5, 6, 59, 20, 115, 581, 0, 0};
	static const int CEX5A_SPEED_IDX[] = {
	3, 3, 6, 8, 32, 218, 0, 0};
	static const int CEX4C_SPEED_IDX[] = {
	24, 25, 82, 41, 138, 1111, 79, 8};
	static const int CEX5C_SPEED_IDX[] = {
	10, 14, 23, 17, 45, 242, 63, 4};
	static const int CEX4P_SPEED_IDX[] = {
	142, 198, 1852, 203, 331, 1563, 0, 8};
	static const int CEX5P_SPEED_IDX[] = {
	49, 67, 131, 52, 85, 287, 0, 4};

	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 (ap_test_bit(&ac->functions, AP_FUNC_ACCEL)) {
	if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) {
	zc->type_string = "CEX4A";
	zc->user_space_type = ZCRYPT_CEX4;
	memcpy(zc->speed_rating, CEX4A_SPEED_IDX,
	sizeof(CEX4A_SPEED_IDX));
	} else {
	zc->type_string = "CEX5A";
	zc->user_space_type = ZCRYPT_CEX5;
	memcpy(zc->speed_rating, CEX5A_SPEED_IDX,
	sizeof(CEX5A_SPEED_IDX));
	}
	zc->min_mod_size = CEX4A_MIN_MOD_SIZE;
	if (ap_test_bit(&ac->functions, AP_FUNC_MEX4K) &&
	ap_test_bit(&ac->functions, AP_FUNC_CRT4K)) {
	zc->max_mod_size = CEX4A_MAX_MOD_SIZE_4K;
	zc->max_exp_bit_length =
	CEX4A_MAX_MOD_SIZE_4K;
	} else {
	zc->max_mod_size = CEX4A_MAX_MOD_SIZE_2K;
	zc->max_exp_bit_length =
	CEX4A_MAX_MOD_SIZE_2K;
	}
	} else if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) {
	if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) {
	zc->type_string = "CEX4C";
	/* wrong user space type, must be CEX4
	* just keep it for cca compatibility
	*/
	zc->user_space_type = ZCRYPT_CEX3C;
	memcpy(zc->speed_rating, CEX4C_SPEED_IDX,
	sizeof(CEX4C_SPEED_IDX));
	} else {
	zc->type_string = "CEX5C";
	/* wrong user space type, must be CEX5
	* just keep it for cca compatibility
	*/
	zc->user_space_type = ZCRYPT_CEX3C;
	memcpy(zc->speed_rating, CEX5C_SPEED_IDX,
	sizeof(CEX5C_SPEED_IDX));
	}
	zc->min_mod_size = CEX4C_MIN_MOD_SIZE;
	zc->max_mod_size = CEX4C_MAX_MOD_SIZE;
	zc->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
	} else if (ap_test_bit(&ac->functions, AP_FUNC_EP11)) {
	if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) {
	zc->type_string = "CEX4P";
	zc->user_space_type = ZCRYPT_CEX4;
	memcpy(zc->speed_rating, CEX4P_SPEED_IDX,
	sizeof(CEX4P_SPEED_IDX));
	} else {
	zc->type_string = "CEX5P";
	zc->user_space_type = ZCRYPT_CEX5;
	memcpy(zc->speed_rating, CEX5P_SPEED_IDX,
	sizeof(CEX5P_SPEED_IDX));
	}
	zc->min_mod_size = CEX4C_MIN_MOD_SIZE;
	zc->max_mod_size = CEX4C_MAX_MOD_SIZE;
	zc->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
	} 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 CEX4 card driver information
	* if an AP card device is removed.
	*/
	static void zcrypt_cex4_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_cex4_card_driver = {
	.probe = zcrypt_cex4_card_probe,
	.remove = zcrypt_cex4_card_remove,
	.ids = zcrypt_cex4_card_ids,
	};

	/**
	* Probe function for CEX4 queue device. 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_cex4_queue_probe(struct ap_device *ap_dev)
	{
	struct ap_queue *aq = to_ap_queue(&ap_dev->device);
	struct zcrypt_queue *zq;
	int rc;

	if (ap_test_bit(&aq->card->functions, AP_FUNC_ACCEL)) {
	zq = zcrypt_queue_alloc(CEX4A_MAX_MESSAGE_SIZE);
	if (!zq)
	return -ENOMEM;
	zq->ops = zcrypt_msgtype(MSGTYPE50_NAME,
	MSGTYPE50_VARIANT_DEFAULT);
	} else if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) {
	zq = zcrypt_queue_alloc(CEX4C_MAX_MESSAGE_SIZE);
	if (!zq)
	return -ENOMEM;
	zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
	MSGTYPE06_VARIANT_DEFAULT);
	} else if (ap_test_bit(&aq->card->functions, AP_FUNC_EP11)) {
	zq = zcrypt_queue_alloc(CEX4C_MAX_MESSAGE_SIZE);
	if (!zq)
	return -ENOMEM;
	zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
	MSGTYPE06_VARIANT_EP11);
	} else {
	return -ENODEV;
	}
	zq->queue = aq;
	zq->online = 1;
	atomic_set(&zq->load, 0);
	ap_queue_init_reply(aq, &zq->reply);
	aq->request_timeout = CEX4_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 CEX4 queue driver information
	* if an AP queue device is removed.
	*/
	static void zcrypt_cex4_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_cex4_queue_driver = {
	.probe = zcrypt_cex4_queue_probe,
	.remove = zcrypt_cex4_queue_remove,
	.suspend = ap_queue_suspend,
	.resume = ap_queue_resume,
	.ids = zcrypt_cex4_queue_ids,
	};

	int __init zcrypt_cex4_init(void)
	{
	int rc;

	rc = ap_driver_register(&zcrypt_cex4_card_driver,
	THIS_MODULE, "cex4card");
	if (rc)
	return rc;

	rc = ap_driver_register(&zcrypt_cex4_queue_driver,
	THIS_MODULE, "cex4queue");
	if (rc)
	ap_driver_unregister(&zcrypt_cex4_card_driver);

	return rc;
	}

	void __exit zcrypt_cex4_exit(void)
	{
	ap_driver_unregister(&zcrypt_cex4_queue_driver);
	ap_driver_unregister(&zcrypt_cex4_card_driver);
	}

	module_init(zcrypt_cex4_init);
	module_exit(zcrypt_cex4_exit);