drivers/s390/crypto/zcrypt_api.h

   1 /*
   2  *  linux/drivers/s390/crypto/zcrypt_api.h
   3  *
   4  *  zcrypt 2.1.0
   5  *
   6  *  Copyright (C)  2001, 2006 IBM Corporation
   7  *  Author(s): Robert Burroughs
   8  *             Eric Rossman (edrossma@us.ibm.com)
   9  *             Cornelia Huck <cornelia.huck@de.ibm.com>
  10  *
  11  *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
  12  *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
  13  *                                Ralph Wuerthner <rwuerthn@de.ibm.com>
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2, or (at your option)
  18  * any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  28  */
  29
  30 #ifndef _ZCRYPT_API_H_
  31 #define _ZCRYPT_API_H_
  32
  33 #include "ap_bus.h"
  34 #include <asm/zcrypt.h>
  35
  36 /* deprecated status calls */
  37 #define ICAZ90STATUS            _IOR(ZCRYPT_IOCTL_MAGIC, 0x10, struct ica_z90_status)
  38 #define Z90STAT_PCIXCCCOUNT     _IOR(ZCRYPT_IOCTL_MAGIC, 0x43, int)
  39
  40 /**
  41  * This structure is deprecated and the corresponding ioctl() has been
  42  * replaced with individual ioctl()s for each piece of data!
  43  */
  44 struct ica_z90_status {
  45         int totalcount;
  46         int leedslitecount; // PCICA
  47         int leeds2count;    // PCICC
  48         // int PCIXCCCount; is not in struct for backward compatibility
  49         int requestqWaitCount;
  50         int pendingqWaitCount;
  51         int totalOpenCount;
  52         int cryptoDomain;
  53         // status: 0=not there, 1=PCICA, 2=PCICC, 3=PCIXCC_MCL2, 4=PCIXCC_MCL3,
  54         //         5=CEX2C
  55         unsigned char status[64];
  56         // qdepth: # work elements waiting for each device
  57         unsigned char qdepth[64];
  58 };
  59
  60 /**
  61  * device type for an actual device is either PCICA, PCICC, PCIXCC_MCL2,
  62  * PCIXCC_MCL3, CEX2C, or CEX2A
  63  *
  64  * NOTE: PCIXCC_MCL3 refers to a PCIXCC with May 2004 version of Licensed
  65  *       Internal Code (LIC) (EC J12220 level 29).
  66  *       PCIXCC_MCL2 refers to any LIC before this level.
  67  */
  68 #define ZCRYPT_PCICA            1
  69 #define ZCRYPT_PCICC            2
  70 #define ZCRYPT_PCIXCC_MCL2      3
  71 #define ZCRYPT_PCIXCC_MCL3      4
  72 #define ZCRYPT_CEX2C            5
  73 #define ZCRYPT_CEX2A            6
  74 #define ZCRYPT_CEX3C            7
  75 #define ZCRYPT_CEX3A            8
  76
  77 /**
  78  * Large random numbers are pulled in 4096 byte chunks from the crypto cards
  79  * and stored in a page. Be careful when increasing this buffer due to size
  80  * limitations for AP requests.
  81  */
  82 #define ZCRYPT_RNG_BUFFER_SIZE  4096
  83
  84 struct zcrypt_device;
  85
  86 struct zcrypt_ops {
  87         long (*rsa_modexpo)(struct zcrypt_device *, struct ica_rsa_modexpo *);
  88         long (*rsa_modexpo_crt)(struct zcrypt_device *,
  89                                 struct ica_rsa_modexpo_crt *);
  90         long (*send_cprb)(struct zcrypt_device *, struct ica_xcRB *);
  91         long (*rng)(struct zcrypt_device *, char *);
  92 };
  93
  94 struct zcrypt_device {
  95         struct list_head list;          /* Device list. */
  96         spinlock_t lock;                /* Per device lock. */
  97         struct kref refcount;           /* device refcounting */
  98         struct ap_device *ap_dev;       /* The "real" ap device. */
  99         struct zcrypt_ops *ops;         /* Crypto operations. */
 100         int online;                     /* User online/offline */
 101
 102         int user_space_type;            /* User space device id. */
 103         char *type_string;              /* User space device name. */
 104         int min_mod_size;               /* Min number of bits. */
 105         int max_mod_size;               /* Max number of bits. */
 106         int short_crt;                  /* Card has crt length restriction. */
 107         int speed_rating;               /* Speed of the crypto device. */
 108
 109         int request_count;              /* # current requests. */
 110
 111         struct ap_message reply;        /* Per-device reply structure. */
 112         int max_exp_bit_length;
 113 };
 114
 115 struct zcrypt_device *zcrypt_device_alloc(size_t);
 116 void zcrypt_device_free(struct zcrypt_device *);
 117 void zcrypt_device_get(struct zcrypt_device *);
 118 int zcrypt_device_put(struct zcrypt_device *);
 119 int zcrypt_device_register(struct zcrypt_device *);
 120 void zcrypt_device_unregister(struct zcrypt_device *);
 121 int zcrypt_api_init(void);
 122 void zcrypt_api_exit(void);
 123
 124 #endif /* _ZCRYPT_API_H_ */