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425 lines
11 KiB
425 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright IBM Corp. 2001, 2018 |
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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/init.h> |
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#include <linux/err.h> |
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#include <linux/delay.h> |
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#include <linux/slab.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_msgtype6.h" |
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#include "zcrypt_cex2c.h" |
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#include "zcrypt_cca_key.h" |
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#include "zcrypt_ccamisc.h" |
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#define CEX2C_MIN_MOD_SIZE 16 /* 128 bits */ |
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#define CEX2C_MAX_MOD_SIZE 256 /* 2048 bits */ |
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#define CEX3C_MIN_MOD_SIZE 16 /* 128 bits */ |
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#define CEX3C_MAX_MOD_SIZE 512 /* 4096 bits */ |
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#define CEX2C_MAX_XCRB_MESSAGE_SIZE (12*1024) |
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#define CEX2C_CLEANUP_TIME (15*HZ) |
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MODULE_AUTHOR("IBM Corporation"); |
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MODULE_DESCRIPTION("CEX2C/CEX3C 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_cex2c_card_ids[] = { |
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{ .dev_type = AP_DEVICE_TYPE_CEX2C, |
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.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE }, |
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{ .dev_type = AP_DEVICE_TYPE_CEX3C, |
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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_cex2c_card_ids); |
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static struct ap_device_id zcrypt_cex2c_queue_ids[] = { |
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{ .dev_type = AP_DEVICE_TYPE_CEX2C, |
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.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE }, |
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{ .dev_type = AP_DEVICE_TYPE_CEX3C, |
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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_cex2c_queue_ids); |
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/* |
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* CCA card additional device attributes |
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*/ |
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static ssize_t cca_serialnr_show(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct zcrypt_card *zc = dev_get_drvdata(dev); |
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struct cca_info ci; |
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struct ap_card *ac = to_ap_card(dev); |
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memset(&ci, 0, sizeof(ci)); |
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if (ap_domain_index >= 0) |
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cca_get_info(ac->id, ap_domain_index, &ci, zc->online); |
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return scnprintf(buf, PAGE_SIZE, "%s\n", ci.serial); |
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} |
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static struct device_attribute dev_attr_cca_serialnr = |
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__ATTR(serialnr, 0444, cca_serialnr_show, NULL); |
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static struct attribute *cca_card_attrs[] = { |
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&dev_attr_cca_serialnr.attr, |
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NULL, |
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}; |
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static const struct attribute_group cca_card_attr_grp = { |
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.attrs = cca_card_attrs, |
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}; |
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/* |
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* CCA queue additional device attributes |
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*/ |
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static ssize_t cca_mkvps_show(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct zcrypt_queue *zq = dev_get_drvdata(dev); |
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int n = 0; |
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struct cca_info ci; |
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static const char * const cao_state[] = { "invalid", "valid" }; |
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static const char * const new_state[] = { "empty", "partial", "full" }; |
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memset(&ci, 0, sizeof(ci)); |
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cca_get_info(AP_QID_CARD(zq->queue->qid), |
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AP_QID_QUEUE(zq->queue->qid), |
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&ci, zq->online); |
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if (ci.new_aes_mk_state >= '1' && ci.new_aes_mk_state <= '3') |
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n = scnprintf(buf, PAGE_SIZE, "AES NEW: %s 0x%016llx\n", |
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new_state[ci.new_aes_mk_state - '1'], |
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ci.new_aes_mkvp); |
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else |
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n = scnprintf(buf, PAGE_SIZE, "AES NEW: - -\n"); |
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if (ci.cur_aes_mk_state >= '1' && ci.cur_aes_mk_state <= '2') |
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n += scnprintf(buf + n, PAGE_SIZE - n, |
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"AES CUR: %s 0x%016llx\n", |
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cao_state[ci.cur_aes_mk_state - '1'], |
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ci.cur_aes_mkvp); |
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else |
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n += scnprintf(buf + n, PAGE_SIZE - n, "AES CUR: - -\n"); |
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if (ci.old_aes_mk_state >= '1' && ci.old_aes_mk_state <= '2') |
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n += scnprintf(buf + n, PAGE_SIZE - n, |
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"AES OLD: %s 0x%016llx\n", |
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cao_state[ci.old_aes_mk_state - '1'], |
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ci.old_aes_mkvp); |
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else |
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n += scnprintf(buf + n, PAGE_SIZE - n, "AES OLD: - -\n"); |
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if (ci.new_apka_mk_state >= '1' && ci.new_apka_mk_state <= '3') |
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n += scnprintf(buf + n, PAGE_SIZE - n, |
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"APKA NEW: %s 0x%016llx\n", |
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new_state[ci.new_apka_mk_state - '1'], |
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ci.new_apka_mkvp); |
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else |
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n += scnprintf(buf + n, PAGE_SIZE - n, "APKA NEW: - -\n"); |
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if (ci.cur_apka_mk_state >= '1' && ci.cur_apka_mk_state <= '2') |
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n += scnprintf(buf + n, PAGE_SIZE - n, |
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"APKA CUR: %s 0x%016llx\n", |
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cao_state[ci.cur_apka_mk_state - '1'], |
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ci.cur_apka_mkvp); |
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else |
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n += scnprintf(buf + n, PAGE_SIZE - n, "APKA CUR: - -\n"); |
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if (ci.old_apka_mk_state >= '1' && ci.old_apka_mk_state <= '2') |
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n += scnprintf(buf + n, PAGE_SIZE - n, |
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"APKA OLD: %s 0x%016llx\n", |
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cao_state[ci.old_apka_mk_state - '1'], |
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ci.old_apka_mkvp); |
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else |
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n += scnprintf(buf + n, PAGE_SIZE - n, "APKA OLD: - -\n"); |
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return n; |
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} |
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static struct device_attribute dev_attr_cca_mkvps = |
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__ATTR(mkvps, 0444, cca_mkvps_show, NULL); |
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static struct attribute *cca_queue_attrs[] = { |
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&dev_attr_cca_mkvps.attr, |
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NULL, |
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}; |
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static const struct attribute_group cca_queue_attr_grp = { |
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.attrs = cca_queue_attrs, |
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}; |
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/* |
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* Large random number detection function. Its sends a message to a CEX2C/CEX3C |
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* card to find out if large random numbers are supported. |
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* @ap_dev: pointer to the AP device. |
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* |
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* Returns 1 if large random numbers are supported, 0 if not and < 0 on error. |
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*/ |
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static int zcrypt_cex2c_rng_supported(struct ap_queue *aq) |
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{ |
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struct ap_message ap_msg; |
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unsigned long long psmid; |
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unsigned int domain; |
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struct { |
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struct type86_hdr hdr; |
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struct type86_fmt2_ext fmt2; |
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struct CPRBX cprbx; |
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} __packed *reply; |
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struct { |
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struct type6_hdr hdr; |
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struct CPRBX cprbx; |
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char function_code[2]; |
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short int rule_length; |
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char rule[8]; |
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short int verb_length; |
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short int key_length; |
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} __packed *msg; |
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int rc, i; |
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ap_init_message(&ap_msg); |
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ap_msg.msg = (void *) get_zeroed_page(GFP_KERNEL); |
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if (!ap_msg.msg) |
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return -ENOMEM; |
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rng_type6CPRB_msgX(&ap_msg, 4, &domain); |
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msg = ap_msg.msg; |
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msg->cprbx.domain = AP_QID_QUEUE(aq->qid); |
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rc = ap_send(aq->qid, 0x0102030405060708ULL, ap_msg.msg, ap_msg.len); |
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if (rc) |
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goto out_free; |
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/* Wait for the test message to complete. */ |
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for (i = 0; i < 2 * HZ; i++) { |
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msleep(1000 / HZ); |
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rc = ap_recv(aq->qid, &psmid, ap_msg.msg, 4096); |
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if (rc == 0 && psmid == 0x0102030405060708ULL) |
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break; |
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} |
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if (i >= 2 * HZ) { |
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/* Got no answer. */ |
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rc = -ENODEV; |
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goto out_free; |
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} |
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reply = ap_msg.msg; |
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if (reply->cprbx.ccp_rtcode == 0 && reply->cprbx.ccp_rscode == 0) |
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rc = 1; |
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else |
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rc = 0; |
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out_free: |
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free_page((unsigned long) ap_msg.msg); |
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return rc; |
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} |
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/* |
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* Probe function for CEX2C/CEX3C card devices. It always accepts the |
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* AP device since the bus_match already checked the hardware type. |
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* @ap_dev: pointer to the AP card device. |
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*/ |
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static int zcrypt_cex2c_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 CEX2C_SPEED_IDX[] = { |
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1000, 1400, 2400, 1100, 1500, 2600, 100, 12}; |
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static const int CEX3C_SPEED_IDX[] = { |
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500, 700, 1400, 550, 800, 1500, 80, 10}; |
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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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switch (ac->ap_dev.device_type) { |
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case AP_DEVICE_TYPE_CEX2C: |
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zc->user_space_type = ZCRYPT_CEX2C; |
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zc->type_string = "CEX2C"; |
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zc->speed_rating = CEX2C_SPEED_IDX; |
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zc->min_mod_size = CEX2C_MIN_MOD_SIZE; |
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zc->max_mod_size = CEX2C_MAX_MOD_SIZE; |
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zc->max_exp_bit_length = CEX2C_MAX_MOD_SIZE; |
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break; |
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case AP_DEVICE_TYPE_CEX3C: |
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zc->user_space_type = ZCRYPT_CEX3C; |
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zc->type_string = "CEX3C"; |
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zc->speed_rating = CEX3C_SPEED_IDX; |
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zc->min_mod_size = CEX3C_MIN_MOD_SIZE; |
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zc->max_mod_size = CEX3C_MAX_MOD_SIZE; |
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zc->max_exp_bit_length = CEX3C_MAX_MOD_SIZE; |
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break; |
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default: |
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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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if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) { |
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rc = sysfs_create_group(&ap_dev->device.kobj, |
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&cca_card_attr_grp); |
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if (rc) { |
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zcrypt_card_unregister(zc); |
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zcrypt_card_free(zc); |
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} |
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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 CEX2C/CEX3C 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_cex2c_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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struct ap_card *ac = to_ap_card(&ap_dev->device); |
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if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) |
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sysfs_remove_group(&ap_dev->device.kobj, &cca_card_attr_grp); |
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zcrypt_card_unregister(zc); |
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} |
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static struct ap_driver zcrypt_cex2c_card_driver = { |
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.probe = zcrypt_cex2c_card_probe, |
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.remove = zcrypt_cex2c_card_remove, |
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.ids = zcrypt_cex2c_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 CEX2C/CEX3C queue devices. It always accepts the |
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* AP device since the bus_match already checked the hardware type. |
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* @ap_dev: pointer to the AP card device. |
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*/ |
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static int zcrypt_cex2c_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; |
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int rc; |
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zq = zcrypt_queue_alloc(CEX2C_MAX_XCRB_MESSAGE_SIZE); |
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if (!zq) |
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return -ENOMEM; |
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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_rapq(aq->qid); |
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rc = zcrypt_cex2c_rng_supported(aq); |
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if (rc < 0) { |
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zcrypt_queue_free(zq); |
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return rc; |
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} |
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if (rc) |
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zq->ops = zcrypt_msgtype(MSGTYPE06_NAME, |
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MSGTYPE06_VARIANT_DEFAULT); |
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else |
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zq->ops = zcrypt_msgtype(MSGTYPE06_NAME, |
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MSGTYPE06_VARIANT_NORNG); |
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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 = CEX2C_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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if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) { |
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rc = sysfs_create_group(&ap_dev->device.kobj, |
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&cca_queue_attr_grp); |
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if (rc) { |
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zcrypt_queue_unregister(zq); |
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zcrypt_queue_free(zq); |
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} |
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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 CEX2C/CEX3C 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_cex2c_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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struct ap_queue *aq = to_ap_queue(&ap_dev->device); |
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if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) |
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sysfs_remove_group(&ap_dev->device.kobj, &cca_queue_attr_grp); |
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zcrypt_queue_unregister(zq); |
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} |
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static struct ap_driver zcrypt_cex2c_queue_driver = { |
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.probe = zcrypt_cex2c_queue_probe, |
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.remove = zcrypt_cex2c_queue_remove, |
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.ids = zcrypt_cex2c_queue_ids, |
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.flags = AP_DRIVER_FLAG_DEFAULT, |
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}; |
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int __init zcrypt_cex2c_init(void) |
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{ |
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int rc; |
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rc = ap_driver_register(&zcrypt_cex2c_card_driver, |
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THIS_MODULE, "cex2card"); |
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if (rc) |
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return rc; |
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rc = ap_driver_register(&zcrypt_cex2c_queue_driver, |
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THIS_MODULE, "cex2cqueue"); |
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if (rc) |
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ap_driver_unregister(&zcrypt_cex2c_card_driver); |
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return rc; |
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} |
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void zcrypt_cex2c_exit(void) |
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{ |
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ap_driver_unregister(&zcrypt_cex2c_queue_driver); |
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ap_driver_unregister(&zcrypt_cex2c_card_driver); |
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} |
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module_init(zcrypt_cex2c_init); |
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module_exit(zcrypt_cex2c_exit);
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