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_ */ 125