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0b622e60bc
Now that the SPDX tag is in all drivers/s390/crypto/ files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Harald Freudenberger <freude@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
178 lines
4.2 KiB
C
178 lines
4.2 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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* Cornelia Huck <cornelia.huck@de.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/init.h>
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#include <linux/interrupt.h>
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#include <linux/miscdevice.h>
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#include <linux/fs.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/compat.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/hw_random.h>
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#include <linux/debugfs.h>
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#include <asm/debug.h>
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#include "zcrypt_debug.h"
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#include "zcrypt_api.h"
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#include "zcrypt_msgtype6.h"
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#include "zcrypt_msgtype50.h"
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/*
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* Device attributes common for all crypto card devices.
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*/
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static ssize_t zcrypt_card_type_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct zcrypt_card *zc = to_ap_card(dev)->private;
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return snprintf(buf, PAGE_SIZE, "%s\n", zc->type_string);
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}
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static DEVICE_ATTR(type, 0444, zcrypt_card_type_show, NULL);
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static ssize_t zcrypt_card_online_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 = to_ap_card(dev)->private;
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return snprintf(buf, PAGE_SIZE, "%d\n", zc->online);
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}
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static ssize_t zcrypt_card_online_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct zcrypt_card *zc = to_ap_card(dev)->private;
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struct zcrypt_queue *zq;
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int online, id;
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if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
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return -EINVAL;
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zc->online = online;
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id = zc->card->id;
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ZCRYPT_DBF(DBF_INFO, "card=%02x online=%d\n", id, online);
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spin_lock(&zcrypt_list_lock);
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list_for_each_entry(zq, &zc->zqueues, list)
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zcrypt_queue_force_online(zq, online);
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spin_unlock(&zcrypt_list_lock);
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return count;
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}
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static DEVICE_ATTR(online, 0644, zcrypt_card_online_show,
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zcrypt_card_online_store);
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static struct attribute *zcrypt_card_attrs[] = {
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&dev_attr_type.attr,
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&dev_attr_online.attr,
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NULL,
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};
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static const struct attribute_group zcrypt_card_attr_group = {
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.attrs = zcrypt_card_attrs,
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};
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struct zcrypt_card *zcrypt_card_alloc(void)
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{
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struct zcrypt_card *zc;
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zc = kzalloc(sizeof(struct zcrypt_card), GFP_KERNEL);
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if (!zc)
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return NULL;
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INIT_LIST_HEAD(&zc->list);
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INIT_LIST_HEAD(&zc->zqueues);
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kref_init(&zc->refcount);
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return zc;
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}
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EXPORT_SYMBOL(zcrypt_card_alloc);
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void zcrypt_card_free(struct zcrypt_card *zc)
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{
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kfree(zc);
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}
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EXPORT_SYMBOL(zcrypt_card_free);
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static void zcrypt_card_release(struct kref *kref)
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{
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struct zcrypt_card *zdev =
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container_of(kref, struct zcrypt_card, refcount);
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zcrypt_card_free(zdev);
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}
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void zcrypt_card_get(struct zcrypt_card *zc)
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{
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kref_get(&zc->refcount);
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}
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EXPORT_SYMBOL(zcrypt_card_get);
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int zcrypt_card_put(struct zcrypt_card *zc)
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{
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return kref_put(&zc->refcount, zcrypt_card_release);
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}
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EXPORT_SYMBOL(zcrypt_card_put);
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/**
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* zcrypt_card_register() - Register a crypto card device.
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* @zc: Pointer to a crypto card device
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*
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* Register a crypto card device. Returns 0 if successful.
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*/
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int zcrypt_card_register(struct zcrypt_card *zc)
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{
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int rc;
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rc = sysfs_create_group(&zc->card->ap_dev.device.kobj,
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&zcrypt_card_attr_group);
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if (rc)
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return rc;
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spin_lock(&zcrypt_list_lock);
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list_add_tail(&zc->list, &zcrypt_card_list);
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spin_unlock(&zcrypt_list_lock);
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zc->online = 1;
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ZCRYPT_DBF(DBF_INFO, "card=%02x register online=1\n", zc->card->id);
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return rc;
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}
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EXPORT_SYMBOL(zcrypt_card_register);
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/**
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* zcrypt_card_unregister(): Unregister a crypto card device.
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* @zc: Pointer to crypto card device
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*
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* Unregister a crypto card device.
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*/
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void zcrypt_card_unregister(struct zcrypt_card *zc)
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{
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ZCRYPT_DBF(DBF_INFO, "card=%02x unregister\n", zc->card->id);
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spin_lock(&zcrypt_list_lock);
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list_del_init(&zc->list);
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spin_unlock(&zcrypt_list_lock);
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sysfs_remove_group(&zc->card->ap_dev.device.kobj,
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&zcrypt_card_attr_group);
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}
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EXPORT_SYMBOL(zcrypt_card_unregister);
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