// 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 * Ralph Wuerthner * MSGTYPE restruct: Holger Dengler */ #include #include #include #include #include #include #include #include #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. * @ap_dev: pointer to the AP device. * * Returns 1 if large random numbers are supported, 0 if not and < 0 on error. */ static int zcrypt_cex2c_rng_supported(struct ap_queue *aq) { struct ap_message ap_msg; unsigned long long psmid; unsigned int domain; struct { struct type86_hdr hdr; struct type86_fmt2_ext fmt2; struct CPRBX cprbx; } __packed *reply; struct { struct type6_hdr hdr; struct CPRBX cprbx; char function_code[2]; short int rule_length; char rule[8]; short int verb_length; short int key_length; } __packed *msg; int rc, i; ap_init_message(&ap_msg); ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL); if (!ap_msg.message) return -ENOMEM; rng_type6CPRB_msgX(&ap_msg, 4, &domain); msg = ap_msg.message; msg->cprbx.domain = AP_QID_QUEUE(aq->qid); rc = ap_send(aq->qid, 0x0102030405060708ULL, ap_msg.message, ap_msg.length); if (rc) goto out_free; /* Wait for the test message to complete. */ for (i = 0; i < 2 * HZ; i++) { msleep(1000 / HZ); rc = ap_recv(aq->qid, &psmid, ap_msg.message, 4096); if (rc == 0 && psmid == 0x0102030405060708ULL) break; } if (i >= 2 * HZ) { /* Got no answer. */ rc = -ENODEV; goto out_free; } reply = ap_msg.message; if (reply->cprbx.ccp_rtcode == 0 && reply->cprbx.ccp_rscode == 0) rc = 1; else rc = 0; out_free: free_page((unsigned long) ap_msg.message); return rc; } /** * Probe function for CEX2C/CEX3C card devices. It always accepts the * AP device since the bus_match already checked the hardware type. * @ap_dev: pointer to the AP card device. */ static int zcrypt_cex2c_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 CEX2C_SPEED_IDX[] = { 1000, 1400, 2400, 1100, 1500, 2600, 100, 12}; static const int CEX3C_SPEED_IDX[] = { 500, 700, 1400, 550, 800, 1500, 80, 10}; 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; switch (ac->ap_dev.device_type) { case AP_DEVICE_TYPE_CEX2C: zc->user_space_type = ZCRYPT_CEX2C; zc->type_string = "CEX2C"; memcpy(zc->speed_rating, CEX2C_SPEED_IDX, sizeof(CEX2C_SPEED_IDX)); zc->min_mod_size = CEX2C_MIN_MOD_SIZE; zc->max_mod_size = CEX2C_MAX_MOD_SIZE; zc->max_exp_bit_length = CEX2C_MAX_MOD_SIZE; break; case AP_DEVICE_TYPE_CEX3C: zc->user_space_type = ZCRYPT_CEX3C; zc->type_string = "CEX3C"; memcpy(zc->speed_rating, CEX3C_SPEED_IDX, sizeof(CEX3C_SPEED_IDX)); zc->min_mod_size = CEX3C_MIN_MOD_SIZE; zc->max_mod_size = CEX3C_MAX_MOD_SIZE; zc->max_exp_bit_length = CEX3C_MAX_MOD_SIZE; break; default: 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 CEX2C/CEX3C card driver information * if an AP card device is removed. */ static void zcrypt_cex2c_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_cex2c_card_driver = { .probe = zcrypt_cex2c_card_probe, .remove = zcrypt_cex2c_card_remove, .ids = zcrypt_cex2c_card_ids, .flags = AP_DRIVER_FLAG_DEFAULT, }; /** * Probe function for CEX2C/CEX3C queue devices. It always accepts the * AP device since the bus_match already checked the hardware type. * @ap_dev: pointer to the AP card device. */ static int zcrypt_cex2c_queue_probe(struct ap_device *ap_dev) { struct ap_queue *aq = to_ap_queue(&ap_dev->device); struct zcrypt_queue *zq; int rc; zq = zcrypt_queue_alloc(CEX2C_MAX_XCRB_MESSAGE_SIZE); if (!zq) return -ENOMEM; zq->queue = aq; zq->online = 1; atomic_set(&zq->load, 0); rc = zcrypt_cex2c_rng_supported(aq); if (rc < 0) { zcrypt_queue_free(zq); return rc; } if (rc) zq->ops = zcrypt_msgtype(MSGTYPE06_NAME, MSGTYPE06_VARIANT_DEFAULT); else zq->ops = zcrypt_msgtype(MSGTYPE06_NAME, MSGTYPE06_VARIANT_NORNG); ap_queue_init_reply(aq, &zq->reply); aq->request_timeout = CEX2C_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 CEX2C/CEX3C queue driver information * if an AP queue device is removed. */ static void zcrypt_cex2c_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_cex2c_queue_driver = { .probe = zcrypt_cex2c_queue_probe, .remove = zcrypt_cex2c_queue_remove, .suspend = ap_queue_suspend, .resume = ap_queue_resume, .ids = zcrypt_cex2c_queue_ids, .flags = AP_DRIVER_FLAG_DEFAULT, }; int __init zcrypt_cex2c_init(void) { int rc; rc = ap_driver_register(&zcrypt_cex2c_card_driver, THIS_MODULE, "cex2card"); if (rc) return rc; rc = ap_driver_register(&zcrypt_cex2c_queue_driver, THIS_MODULE, "cex2cqueue"); if (rc) ap_driver_unregister(&zcrypt_cex2c_card_driver); return rc; } void zcrypt_cex2c_exit(void) { ap_driver_unregister(&zcrypt_cex2c_queue_driver); ap_driver_unregister(&zcrypt_cex2c_card_driver); } module_init(zcrypt_cex2c_init); module_exit(zcrypt_cex2c_exit);