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![Harald Freudenberger](/assets/img/avatar_default.png)
This patch tries to fix as much as possible of the checkpatch.pl --strict findings: CHECK: Logical continuations should be on the previous line CHECK: No space is necessary after a cast CHECK: Alignment should match open parenthesis CHECK: 'useable' may be misspelled - perhaps 'usable'? WARNING: Possible repeated word: 'is' CHECK: spaces preferred around that '*' (ctx:VxV) CHECK: Comparison to NULL could be written "!msg" CHECK: Prefer kzalloc(sizeof(*zc)...) over kzalloc(sizeof(struct...)...) CHECK: Unnecessary parentheses around resp_type->work CHECK: Avoid CamelCase: <xcRB> There is no functional change comming with this patch, only code cleanup, renaming, whitespaces, indenting, ... but no semantic change in any way. Also the API (zcrypt and pkey header file) is semantically unchanged. Signed-off-by: Harald Freudenberger <freude@linux.ibm.com> Reviewed-by: Jürgen Christ <jchrist@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
227 lines
6.1 KiB
C
227 lines
6.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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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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*/
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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/CEX3A Cryptographic Coprocessor device driver, " \
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"Copyright IBM Corp. 2001, 2018");
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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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dev_set_drvdata(&ap_dev->device, 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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zc->speed_rating = 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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zc->speed_rating = 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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zcrypt_card_free(zc);
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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 = dev_get_drvdata(&ap_dev->device);
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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_state(aq);
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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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dev_set_drvdata(&ap_dev->device, zq);
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rc = zcrypt_queue_register(zq);
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if (rc)
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zcrypt_queue_free(zq);
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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 zcrypt_queue *zq = dev_get_drvdata(&ap_dev->device);
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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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.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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