1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Copyright IBM Corp. 2001, 2019 4 * Author(s): Robert Burroughs 5 * Eric Rossman (edrossma@us.ibm.com) 6 * Cornelia Huck <cornelia.huck@de.ibm.com> 7 * 8 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com) 9 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com> 10 * Ralph Wuerthner <rwuerthn@de.ibm.com> 11 * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com> 12 */ 13 14 #ifndef _ZCRYPT_API_H_ 15 #define _ZCRYPT_API_H_ 16 17 #include <linux/atomic.h> 18 #include <asm/debug.h> 19 #include <asm/zcrypt.h> 20 #include "ap_bus.h" 21 22 /** 23 * Supported device types 24 */ 25 #define ZCRYPT_CEX2C 5 26 #define ZCRYPT_CEX2A 6 27 #define ZCRYPT_CEX3C 7 28 #define ZCRYPT_CEX3A 8 29 #define ZCRYPT_CEX4 10 30 #define ZCRYPT_CEX5 11 31 #define ZCRYPT_CEX6 12 32 #define ZCRYPT_CEX7 13 33 34 /** 35 * Large random numbers are pulled in 4096 byte chunks from the crypto cards 36 * and stored in a page. Be careful when increasing this buffer due to size 37 * limitations for AP requests. 38 */ 39 #define ZCRYPT_RNG_BUFFER_SIZE 4096 40 41 /* 42 * Identifier for Crypto Request Performance Index 43 */ 44 enum crypto_ops { 45 MEX_1K, 46 MEX_2K, 47 MEX_4K, 48 CRT_1K, 49 CRT_2K, 50 CRT_4K, 51 HWRNG, 52 SECKEY, 53 NUM_OPS 54 }; 55 56 struct zcrypt_queue; 57 58 struct zcrypt_ops { 59 long (*rsa_modexpo)(struct zcrypt_queue *, struct ica_rsa_modexpo *); 60 long (*rsa_modexpo_crt)(struct zcrypt_queue *, 61 struct ica_rsa_modexpo_crt *); 62 long (*send_cprb)(struct zcrypt_queue *, struct ica_xcRB *, 63 struct ap_message *); 64 long (*send_ep11_cprb)(struct zcrypt_queue *, struct ep11_urb *, 65 struct ap_message *); 66 long (*rng)(struct zcrypt_queue *, char *, struct ap_message *); 67 struct list_head list; /* zcrypt ops list. */ 68 struct module *owner; 69 int variant; 70 char name[128]; 71 }; 72 73 struct zcrypt_card { 74 struct list_head list; /* Device list. */ 75 struct list_head zqueues; /* List of zcrypt queues */ 76 struct kref refcount; /* device refcounting */ 77 struct ap_card *card; /* The "real" ap card device. */ 78 int online; /* User online/offline */ 79 80 int user_space_type; /* User space device id. */ 81 char *type_string; /* User space device name. */ 82 int min_mod_size; /* Min number of bits. */ 83 int max_mod_size; /* Max number of bits. */ 84 int max_exp_bit_length; 85 int speed_rating[NUM_OPS]; /* Speed idx of crypto ops. */ 86 atomic_t load; /* Utilization of the crypto device */ 87 88 int request_count; /* # current requests. */ 89 }; 90 91 struct zcrypt_queue { 92 struct list_head list; /* Device list. */ 93 struct kref refcount; /* device refcounting */ 94 struct zcrypt_card *zcard; 95 struct zcrypt_ops *ops; /* Crypto operations. */ 96 struct ap_queue *queue; /* The "real" ap queue device. */ 97 int online; /* User online/offline */ 98 99 atomic_t load; /* Utilization of the crypto device */ 100 101 int request_count; /* # current requests. */ 102 103 struct ap_message reply; /* Per-device reply structure. */ 104 }; 105 106 /* transport layer rescanning */ 107 extern atomic_t zcrypt_rescan_req; 108 109 extern spinlock_t zcrypt_list_lock; 110 extern int zcrypt_device_count; 111 extern struct list_head zcrypt_card_list; 112 113 #define for_each_zcrypt_card(_zc) \ 114 list_for_each_entry(_zc, &zcrypt_card_list, list) 115 116 #define for_each_zcrypt_queue(_zq, _zc) \ 117 list_for_each_entry(_zq, &(_zc)->zqueues, list) 118 119 struct zcrypt_card *zcrypt_card_alloc(void); 120 void zcrypt_card_free(struct zcrypt_card *); 121 void zcrypt_card_get(struct zcrypt_card *); 122 int zcrypt_card_put(struct zcrypt_card *); 123 int zcrypt_card_register(struct zcrypt_card *); 124 void zcrypt_card_unregister(struct zcrypt_card *); 125 126 struct zcrypt_queue *zcrypt_queue_alloc(size_t); 127 void zcrypt_queue_free(struct zcrypt_queue *); 128 void zcrypt_queue_get(struct zcrypt_queue *); 129 int zcrypt_queue_put(struct zcrypt_queue *); 130 int zcrypt_queue_register(struct zcrypt_queue *); 131 void zcrypt_queue_unregister(struct zcrypt_queue *); 132 void zcrypt_queue_force_online(struct zcrypt_queue *, int); 133 134 int zcrypt_rng_device_add(void); 135 void zcrypt_rng_device_remove(void); 136 137 void zcrypt_msgtype_register(struct zcrypt_ops *); 138 void zcrypt_msgtype_unregister(struct zcrypt_ops *); 139 struct zcrypt_ops *zcrypt_msgtype(unsigned char *, int); 140 int zcrypt_api_init(void); 141 void zcrypt_api_exit(void); 142 long zcrypt_send_cprb(struct ica_xcRB *xcRB); 143 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus); 144 int zcrypt_device_status_ext(int card, int queue, 145 struct zcrypt_device_status_ext *devstatus); 146 147 #endif /* _ZCRYPT_API_H_ */ 148