/* * 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 * Ralph Wuerthner * MSGTYPE restruct: Holger Dengler * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #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_pcixcc.h" #include "zcrypt_cca_key.h" #define PCIXCC_MIN_MOD_SIZE 16 /* 128 bits */ #define PCIXCC_MIN_MOD_SIZE_OLD 64 /* 512 bits */ #define PCIXCC_MAX_MOD_SIZE 256 /* 2048 bits */ #define CEX3C_MIN_MOD_SIZE PCIXCC_MIN_MOD_SIZE #define CEX3C_MAX_MOD_SIZE 512 /* 4096 bits */ #define PCIXCC_MAX_ICA_MESSAGE_SIZE 0x77c /* max size type6 v2 crt message */ #define PCIXCC_MAX_ICA_RESPONSE_SIZE 0x77c /* max size type86 v2 reply */ #define PCIXCC_MAX_XCRB_MESSAGE_SIZE (12*1024) #define PCIXCC_CLEANUP_TIME (15*HZ) #define CEIL4(x) ((((x)+3)/4)*4) struct response_type { struct completion work; int type; }; #define PCIXCC_RESPONSE_TYPE_ICA 0 #define PCIXCC_RESPONSE_TYPE_XCRB 1 MODULE_AUTHOR("IBM Corporation"); MODULE_DESCRIPTION("PCIXCC Cryptographic Coprocessor device driver, " \ "Copyright IBM Corp. 2001, 2012"); MODULE_LICENSE("GPL"); static struct ap_device_id zcrypt_pcixcc_card_ids[] = { { .dev_type = AP_DEVICE_TYPE_PCIXCC, .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE }, { .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_pcixcc_card_ids); static struct ap_device_id zcrypt_pcixcc_queue_ids[] = { { .dev_type = AP_DEVICE_TYPE_PCIXCC, .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE }, { .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_pcixcc_queue_ids); /** * Large random number detection function. Its sends a message to a pcixcc * 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_pcixcc_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; } __attribute__((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 PCIXCC/CEX2C card devices. It always accepts the * AP device since the bus_match already checked the hardware type. The * PCIXCC cards come in two flavours: micro code level 2 and micro code * level 3. This is checked by sending a test message to the device. * @ap_dev: pointer to the AP card device. */ static int zcrypt_pcixcc_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 = PCIXCC_MIN_MOD_SIZE; zc->max_mod_size = PCIXCC_MAX_MOD_SIZE; zc->max_exp_bit_length = PCIXCC_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 PCIXCC/CEX2C card driver information * if an AP card device is removed. */ static void zcrypt_pcixcc_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_pcixcc_card_driver = { .probe = zcrypt_pcixcc_card_probe, .remove = zcrypt_pcixcc_card_remove, .ids = zcrypt_pcixcc_card_ids, }; /** * Probe function for PCIXCC/CEX2C queue devices. It always accepts the * AP device since the bus_match already checked the hardware type. The * PCIXCC cards come in two flavours: micro code level 2 and micro code * level 3. This is checked by sending a test message to the device. * @ap_dev: pointer to the AP card device. */ static int zcrypt_pcixcc_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(PCIXCC_MAX_XCRB_MESSAGE_SIZE); if (!zq) return -ENOMEM; zq->queue = aq; zq->online = 1; atomic_set(&zq->load, 0); rc = zcrypt_pcixcc_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 = PCIXCC_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 PCIXCC/CEX2C queue driver information * if an AP queue device is removed. */ static void zcrypt_pcixcc_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_pcixcc_queue_driver = { .probe = zcrypt_pcixcc_queue_probe, .remove = zcrypt_pcixcc_queue_remove, .suspend = ap_queue_suspend, .resume = ap_queue_resume, .ids = zcrypt_pcixcc_queue_ids, }; int __init zcrypt_pcixcc_init(void) { int rc; rc = ap_driver_register(&zcrypt_pcixcc_card_driver, THIS_MODULE, "pcixcccard"); if (rc) return rc; rc = ap_driver_register(&zcrypt_pcixcc_queue_driver, THIS_MODULE, "pcixccqueue"); if (rc) ap_driver_unregister(&zcrypt_pcixcc_card_driver); return rc; } void zcrypt_pcixcc_exit(void) { ap_driver_unregister(&zcrypt_pcixcc_queue_driver); ap_driver_unregister(&zcrypt_pcixcc_card_driver); } module_init(zcrypt_pcixcc_init); module_exit(zcrypt_pcixcc_exit);