linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 *  Copyright IBM Corp. 2001, 2018

 *  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>

 */

​

#include <linux/module.h>

#include <linux/init.h>

#include <linux/err.h>

#include <linux/delay.h>

#include <linux/slab.h>

#include <linux/atomic.h>

#include <linux/uaccess.h>

#include <linux/mod_devicetable.h>

​

#include "ap_bus.h"

#include "zcrypt_api.h"

#include "zcrypt_error.h"

#include "zcrypt_msgtype6.h"

#include "zcrypt_cex2c.h"

#include "zcrypt_cca_key.h"

​

#define CEX2C_MIN_MOD_SIZE   16 /*  128 bits    */

#define CEX2C_MAX_MOD_SIZE  256 /* 2048 bits    */

#define CEX3C_MIN_MOD_SIZE   16 /*  128 bits    */

#define CEX3C_MAX_MOD_SIZE  512 /* 4096 bits    */

#define CEX2C_MAX_XCRB_MESSAGE_SIZE (12*1024)

#define CEX2C_CLEANUP_TIME  (15*HZ)

​

MODULE_AUTHOR("IBM Corporation");

MODULE_DESCRIPTION("CEX2C/CEX3C Cryptographic Coprocessor device driver, " \

           "Copyright IBM Corp. 2001, 2018");

MODULE_LICENSE("GPL");

​

static struct ap_device_id zcrypt_cex2c_card_ids[] = {

    { .dev_type = AP_DEVICE_TYPE_CEX2C,

      .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },

    { .dev_type = AP_DEVICE_TYPE_CEX3C,

      .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },

    { /* end of list */ },

};

​

MODULE_DEVICE_TABLE(ap, zcrypt_cex2c_card_ids);

​

static struct ap_device_id zcrypt_cex2c_queue_ids[] = {

    { .dev_type = AP_DEVICE_TYPE_CEX2C,

      .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },

    { .dev_type = AP_DEVICE_TYPE_CEX3C,

      .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },

    { /* end of list */ },

};

​

MODULE_DEVICE_TABLE(ap, zcrypt_cex2c_queue_ids);

​

/**

 * Large random number detection function. Its sends a message to a CEX2C/CEX3C

 * card to find out if large random numbers are supported.