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233 lines
6.2 KiB
233 lines
6.2 KiB
// 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 ([email protected]) |
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* |
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* Hotplug & misc device support: Jochen Roehrig ([email protected]) |
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* Major cleanup & driver split: Martin Schwidefsky <[email protected]> |
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* Ralph Wuerthner <[email protected]> |
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* MSGTYPE restruct: Holger Dengler <[email protected]> |
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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/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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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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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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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_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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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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.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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