239 lines
6.3 KiB
C
239 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* zcrypt 2.1.0
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*
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* Copyright IBM Corp. 2001, 2012
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* Author(s): Robert Burroughs
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* Eric Rossman (edrossma@us.ibm.com)
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*
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* Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
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* Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Ralph Wuerthner <rwuerthn@de.ibm.com>
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* MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/atomic.h>
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#include <linux/uaccess.h>
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#include <linux/mod_devicetable.h>
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#include "ap_bus.h"
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#include "zcrypt_api.h"
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#include "zcrypt_error.h"
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#include "zcrypt_cex2a.h"
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#include "zcrypt_msgtype50.h"
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#define CEX2A_MIN_MOD_SIZE 1 /* 8 bits */
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#define CEX2A_MAX_MOD_SIZE 256 /* 2048 bits */
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#define CEX3A_MIN_MOD_SIZE CEX2A_MIN_MOD_SIZE
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#define CEX3A_MAX_MOD_SIZE 512 /* 4096 bits */
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#define CEX2A_MAX_MESSAGE_SIZE 0x390 /* sizeof(struct type50_crb2_msg) */
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#define CEX2A_MAX_RESPONSE_SIZE 0x110 /* max outputdatalength + type80_hdr */
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#define CEX3A_MAX_RESPONSE_SIZE 0x210 /* 512 bit modulus
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* (max outputdatalength) +
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* type80_hdr*/
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#define CEX3A_MAX_MESSAGE_SIZE sizeof(struct type50_crb3_msg)
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#define CEX2A_CLEANUP_TIME (15*HZ)
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#define CEX3A_CLEANUP_TIME CEX2A_CLEANUP_TIME
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MODULE_AUTHOR("IBM Corporation");
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MODULE_DESCRIPTION("CEX2A Cryptographic Coprocessor device driver, " \
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"Copyright IBM Corp. 2001, 2012");
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MODULE_LICENSE("GPL");
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static struct ap_device_id zcrypt_cex2a_card_ids[] = {
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{ .dev_type = AP_DEVICE_TYPE_CEX2A,
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.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
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{ .dev_type = AP_DEVICE_TYPE_CEX3A,
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.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
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{ /* end of list */ },
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};
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MODULE_DEVICE_TABLE(ap, zcrypt_cex2a_card_ids);
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static struct ap_device_id zcrypt_cex2a_queue_ids[] = {
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{ .dev_type = AP_DEVICE_TYPE_CEX2A,
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.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
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{ .dev_type = AP_DEVICE_TYPE_CEX3A,
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.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
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{ /* end of list */ },
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};
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MODULE_DEVICE_TABLE(ap, zcrypt_cex2a_queue_ids);
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/**
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* Probe function for CEX2A card devices. It always accepts the AP device
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* since the bus_match already checked the card type.
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* @ap_dev: pointer to the AP device.
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*/
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static int zcrypt_cex2a_card_probe(struct ap_device *ap_dev)
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{
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/*
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* Normalized speed ratings per crypto adapter
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* MEX_1k, MEX_2k, MEX_4k, CRT_1k, CRT_2k, CRT_4k, RNG, SECKEY
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*/
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static const int CEX2A_SPEED_IDX[] = {
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800, 1000, 2000, 900, 1200, 2400, 0, 0};
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static const int CEX3A_SPEED_IDX[] = {
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400, 500, 1000, 450, 550, 1200, 0, 0};
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struct ap_card *ac = to_ap_card(&ap_dev->device);
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struct zcrypt_card *zc;
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int rc = 0;
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zc = zcrypt_card_alloc();
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if (!zc)
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return -ENOMEM;
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zc->card = ac;
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ac->private = zc;
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if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX2A) {
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zc->min_mod_size = CEX2A_MIN_MOD_SIZE;
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zc->max_mod_size = CEX2A_MAX_MOD_SIZE;
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memcpy(zc->speed_rating, CEX2A_SPEED_IDX,
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sizeof(CEX2A_SPEED_IDX));
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zc->max_exp_bit_length = CEX2A_MAX_MOD_SIZE;
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zc->type_string = "CEX2A";
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zc->user_space_type = ZCRYPT_CEX2A;
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} else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX3A) {
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zc->min_mod_size = CEX2A_MIN_MOD_SIZE;
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zc->max_mod_size = CEX2A_MAX_MOD_SIZE;
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zc->max_exp_bit_length = CEX2A_MAX_MOD_SIZE;
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if (ap_test_bit(&ac->functions, AP_FUNC_MEX4K) &&
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ap_test_bit(&ac->functions, AP_FUNC_CRT4K)) {
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zc->max_mod_size = CEX3A_MAX_MOD_SIZE;
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zc->max_exp_bit_length = CEX3A_MAX_MOD_SIZE;
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}
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memcpy(zc->speed_rating, CEX3A_SPEED_IDX,
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sizeof(CEX3A_SPEED_IDX));
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zc->type_string = "CEX3A";
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zc->user_space_type = ZCRYPT_CEX3A;
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} else {
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zcrypt_card_free(zc);
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return -ENODEV;
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}
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zc->online = 1;
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rc = zcrypt_card_register(zc);
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if (rc) {
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ac->private = NULL;
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zcrypt_card_free(zc);
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}
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return rc;
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}
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/**
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* This is called to remove the CEX2A card driver information
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* if an AP card device is removed.
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*/
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static void zcrypt_cex2a_card_remove(struct ap_device *ap_dev)
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{
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struct zcrypt_card *zc = to_ap_card(&ap_dev->device)->private;
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if (zc)
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zcrypt_card_unregister(zc);
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}
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static struct ap_driver zcrypt_cex2a_card_driver = {
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.probe = zcrypt_cex2a_card_probe,
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.remove = zcrypt_cex2a_card_remove,
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.ids = zcrypt_cex2a_card_ids,
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.flags = AP_DRIVER_FLAG_DEFAULT,
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};
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/**
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* Probe function for CEX2A queue devices. It always accepts the AP device
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* since the bus_match already checked the queue type.
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* @ap_dev: pointer to the AP device.
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*/
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static int zcrypt_cex2a_queue_probe(struct ap_device *ap_dev)
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{
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struct ap_queue *aq = to_ap_queue(&ap_dev->device);
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struct zcrypt_queue *zq = NULL;
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int rc;
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switch (ap_dev->device_type) {
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case AP_DEVICE_TYPE_CEX2A:
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zq = zcrypt_queue_alloc(CEX2A_MAX_RESPONSE_SIZE);
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if (!zq)
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return -ENOMEM;
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break;
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case AP_DEVICE_TYPE_CEX3A:
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zq = zcrypt_queue_alloc(CEX3A_MAX_RESPONSE_SIZE);
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if (!zq)
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return -ENOMEM;
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break;
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}
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if (!zq)
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return -ENODEV;
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zq->ops = zcrypt_msgtype(MSGTYPE50_NAME, MSGTYPE50_VARIANT_DEFAULT);
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zq->queue = aq;
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zq->online = 1;
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atomic_set(&zq->load, 0);
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ap_queue_init_reply(aq, &zq->reply);
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aq->request_timeout = CEX2A_CLEANUP_TIME,
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aq->private = zq;
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rc = zcrypt_queue_register(zq);
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if (rc) {
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aq->private = NULL;
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zcrypt_queue_free(zq);
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}
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return rc;
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}
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/**
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* This is called to remove the CEX2A queue driver information
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* if an AP queue device is removed.
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*/
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static void zcrypt_cex2a_queue_remove(struct ap_device *ap_dev)
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{
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struct ap_queue *aq = to_ap_queue(&ap_dev->device);
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struct zcrypt_queue *zq = aq->private;
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if (zq)
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zcrypt_queue_unregister(zq);
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}
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static struct ap_driver zcrypt_cex2a_queue_driver = {
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.probe = zcrypt_cex2a_queue_probe,
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.remove = zcrypt_cex2a_queue_remove,
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.suspend = ap_queue_suspend,
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.resume = ap_queue_resume,
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.ids = zcrypt_cex2a_queue_ids,
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.flags = AP_DRIVER_FLAG_DEFAULT,
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};
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int __init zcrypt_cex2a_init(void)
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{
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int rc;
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rc = ap_driver_register(&zcrypt_cex2a_card_driver,
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THIS_MODULE, "cex2acard");
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if (rc)
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return rc;
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rc = ap_driver_register(&zcrypt_cex2a_queue_driver,
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THIS_MODULE, "cex2aqueue");
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if (rc)
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ap_driver_unregister(&zcrypt_cex2a_card_driver);
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return rc;
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}
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void __exit zcrypt_cex2a_exit(void)
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{
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ap_driver_unregister(&zcrypt_cex2a_queue_driver);
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ap_driver_unregister(&zcrypt_cex2a_card_driver);
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}
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module_init(zcrypt_cex2a_init);
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module_exit(zcrypt_cex2a_exit);
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