// SPDX-License-Identifier: GPL-2.0+ /* * Copyright IBM Corp. 2001, 2012 * 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 * Ralph Wuerthner * MSGTYPE restruct: Holger Dengler */ #include #include #include #include #include #include #include #include "ap_bus.h" #include "zcrypt_api.h" #include "zcrypt_error.h" #include "zcrypt_cex2a.h" #include "zcrypt_msgtype50.h" #define CEX2A_MIN_MOD_SIZE 1 /* 8 bits */ #define CEX2A_MAX_MOD_SIZE 256 /* 2048 bits */ #define CEX3A_MIN_MOD_SIZE CEX2A_MIN_MOD_SIZE #define CEX3A_MAX_MOD_SIZE 512 /* 4096 bits */ #define CEX2A_MAX_MESSAGE_SIZE 0x390 /* sizeof(struct type50_crb2_msg) */ #define CEX2A_MAX_RESPONSE_SIZE 0x110 /* max outputdatalength + type80_hdr */ #define CEX3A_MAX_RESPONSE_SIZE 0x210 /* 512 bit modulus * (max outputdatalength) + * type80_hdr*/ #define CEX3A_MAX_MESSAGE_SIZE sizeof(struct type50_crb3_msg) #define CEX2A_CLEANUP_TIME (15*HZ) #define CEX3A_CLEANUP_TIME CEX2A_CLEANUP_TIME MODULE_AUTHOR("IBM Corporation"); MODULE_DESCRIPTION("CEX2A/CEX3A Cryptographic Coprocessor device driver, " \ "Copyright IBM Corp. 2001, 2018"); MODULE_LICENSE("GPL"); static struct ap_device_id zcrypt_cex2a_card_ids[] = { { .dev_type = AP_DEVICE_TYPE_CEX2A, .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE }, { .dev_type = AP_DEVICE_TYPE_CEX3A, .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE }, { /* end of list */ }, }; MODULE_DEVICE_TABLE(ap, zcrypt_cex2a_card_ids); static struct ap_device_id zcrypt_cex2a_queue_ids[] = { { .dev_type = AP_DEVICE_TYPE_CEX2A, .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE }, { .dev_type = AP_DEVICE_TYPE_CEX3A, .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE }, { /* end of list */ }, }; MODULE_DEVICE_TABLE(ap, zcrypt_cex2a_queue_ids); /** * Probe function for CEX2A card devices. It always accepts the AP device * since the bus_match already checked the card type. * @ap_dev: pointer to the AP device. */ static int zcrypt_cex2a_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 CEX2A_SPEED_IDX[] = { 800, 1000, 2000, 900, 1200, 2400, 0, 0}; static const int CEX3A_SPEED_IDX[] = { 400, 500, 1000, 450, 550, 1200, 0, 0}; 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 (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX2A) { zc->min_mod_size = CEX2A_MIN_MOD_SIZE; zc->max_mod_size = CEX2A_MAX_MOD_SIZE; memcpy(zc->speed_rating, CEX2A_SPEED_IDX, sizeof(CEX2A_SPEED_IDX)); zc->max_exp_bit_length = CEX2A_MAX_MOD_SIZE; zc->type_string = "CEX2A"; zc->user_space_type = ZCRYPT_CEX2A; } else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX3A) { zc->min_mod_size = CEX2A_MIN_MOD_SIZE; zc->max_mod_size = CEX2A_MAX_MOD_SIZE; zc->max_exp_bit_length = CEX2A_MAX_MOD_SIZE; if (ap_test_bit(&ac->functions, AP_FUNC_MEX4K) && ap_test_bit(&ac->functions, AP_FUNC_CRT4K)) { zc->max_mod_size = CEX3A_MAX_MOD_SIZE; zc->max_exp_bit_length = CEX3A_MAX_MOD_SIZE; } memcpy(zc->speed_rating, CEX3A_SPEED_IDX, sizeof(CEX3A_SPEED_IDX)); zc->type_string = "CEX3A"; zc->user_space_type = ZCRYPT_CEX3A; } 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 CEX2A card driver information * if an AP card device is removed. */ static void zcrypt_cex2a_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_cex2a_card_driver = { .probe = zcrypt_cex2a_card_probe, .remove = zcrypt_cex2a_card_remove, .ids = zcrypt_cex2a_card_ids, .flags = AP_DRIVER_FLAG_DEFAULT, }; /** * Probe function for CEX2A queue devices. It always accepts the AP device * since the bus_match already checked the queue type. * @ap_dev: pointer to the AP device. */ static int zcrypt_cex2a_queue_probe(struct ap_device *ap_dev) { struct ap_queue *aq = to_ap_queue(&ap_dev->device); struct zcrypt_queue *zq = NULL; int rc; switch (ap_dev->device_type) { case AP_DEVICE_TYPE_CEX2A: zq = zcrypt_queue_alloc(CEX2A_MAX_RESPONSE_SIZE); if (!zq) return -ENOMEM; break; case AP_DEVICE_TYPE_CEX3A: zq = zcrypt_queue_alloc(CEX3A_MAX_RESPONSE_SIZE); if (!zq) return -ENOMEM; break; } if (!zq) return -ENODEV; zq->ops = zcrypt_msgtype(MSGTYPE50_NAME, MSGTYPE50_VARIANT_DEFAULT); zq->queue = aq; zq->online = 1; atomic_set(&zq->load, 0); ap_queue_init_reply(aq, &zq->reply); aq->request_timeout = CEX2A_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 CEX2A queue driver information * if an AP queue device is removed. */ static void zcrypt_cex2a_queue_remove(struct ap_device *ap_dev) { struct ap_queue *aq = to_ap_queue(&ap_dev->device); struct zcrypt_queue *zq = aq->private; if (zq) zcrypt_queue_unregister(zq); } static struct ap_driver zcrypt_cex2a_queue_driver = { .probe = zcrypt_cex2a_queue_probe, .remove = zcrypt_cex2a_queue_remove, .suspend = ap_queue_suspend, .resume = ap_queue_resume, .ids = zcrypt_cex2a_queue_ids, .flags = AP_DRIVER_FLAG_DEFAULT, }; int __init zcrypt_cex2a_init(void) { int rc; rc = ap_driver_register(&zcrypt_cex2a_card_driver, THIS_MODULE, "cex2acard"); if (rc) return rc; rc = ap_driver_register(&zcrypt_cex2a_queue_driver, THIS_MODULE, "cex2aqueue"); if (rc) ap_driver_unregister(&zcrypt_cex2a_card_driver); return rc; } void __exit zcrypt_cex2a_exit(void) { ap_driver_unregister(&zcrypt_cex2a_queue_driver); ap_driver_unregister(&zcrypt_cex2a_card_driver); } module_init(zcrypt_cex2a_init); module_exit(zcrypt_cex2a_exit);