| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * zcrypt 2.1.0 |
| * |
| * 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 <schwidefsky@de.ibm.com> |
| * Ralph Wuerthner <rwuerthn@de.ibm.com> |
| * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com> |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/err.h> |
| #include <linux/atomic.h> |
| #include <linux/uaccess.h> |
| #include <linux/mod_devicetable.h> |
| |
| #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 Cryptographic Coprocessor device driver, " \ |
| "Copyright IBM Corp. 2001, 2012"); |
| 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; |
| |
| ap_queue_remove(aq); |
| 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); |