v4.19.13 snapshot.
diff --git a/drivers/s390/crypto/zcrypt_queue.c b/drivers/s390/crypto/zcrypt_queue.c
new file mode 100644
index 0000000..8df82c6
--- /dev/null
+++ b/drivers/s390/crypto/zcrypt_queue.c
@@ -0,0 +1,228 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * zcrypt 2.1.0
+ *
+ * Copyright IBM Corp. 2001, 2012
+ * Author(s): Robert Burroughs
+ * Eric Rossman (edrossma@us.ibm.com)
+ * Cornelia Huck <cornelia.huck@de.ibm.com>
+ *
+ * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
+ * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Ralph Wuerthner <rwuerthn@de.ibm.com>
+ * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/miscdevice.h>
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/compat.h>
+#include <linux/slab.h>
+#include <linux/atomic.h>
+#include <linux/uaccess.h>
+#include <linux/hw_random.h>
+#include <linux/debugfs.h>
+#include <asm/debug.h>
+
+#include "zcrypt_debug.h"
+#include "zcrypt_api.h"
+
+#include "zcrypt_msgtype6.h"
+#include "zcrypt_msgtype50.h"
+
+/*
+ * Device attributes common for all crypto queue devices.
+ */
+
+static ssize_t online_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct zcrypt_queue *zq = to_ap_queue(dev)->private;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", zq->online);
+}
+
+static ssize_t online_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct zcrypt_queue *zq = to_ap_queue(dev)->private;
+ struct zcrypt_card *zc = zq->zcard;
+ int online;
+
+ if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
+ return -EINVAL;
+
+ if (online && !zc->online)
+ return -EINVAL;
+ zq->online = online;
+
+ ZCRYPT_DBF(DBF_INFO, "queue=%02x.%04x online=%d\n",
+ AP_QID_CARD(zq->queue->qid),
+ AP_QID_QUEUE(zq->queue->qid),
+ online);
+
+ if (!online)
+ ap_flush_queue(zq->queue);
+ return count;
+}
+
+static DEVICE_ATTR_RW(online);
+
+static ssize_t load_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct zcrypt_queue *zq = to_ap_queue(dev)->private;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zq->load));
+}
+
+static DEVICE_ATTR_RO(load);
+
+static struct attribute *zcrypt_queue_attrs[] = {
+ &dev_attr_online.attr,
+ &dev_attr_load.attr,
+ NULL,
+};
+
+static const struct attribute_group zcrypt_queue_attr_group = {
+ .attrs = zcrypt_queue_attrs,
+};
+
+void zcrypt_queue_force_online(struct zcrypt_queue *zq, int online)
+{
+ zq->online = online;
+ if (!online)
+ ap_flush_queue(zq->queue);
+}
+
+struct zcrypt_queue *zcrypt_queue_alloc(size_t max_response_size)
+{
+ struct zcrypt_queue *zq;
+
+ zq = kzalloc(sizeof(struct zcrypt_queue), GFP_KERNEL);
+ if (!zq)
+ return NULL;
+ zq->reply.message = kmalloc(max_response_size, GFP_KERNEL);
+ if (!zq->reply.message)
+ goto out_free;
+ zq->reply.length = max_response_size;
+ INIT_LIST_HEAD(&zq->list);
+ kref_init(&zq->refcount);
+ return zq;
+
+out_free:
+ kfree(zq);
+ return NULL;
+}
+EXPORT_SYMBOL(zcrypt_queue_alloc);
+
+void zcrypt_queue_free(struct zcrypt_queue *zq)
+{
+ kfree(zq->reply.message);
+ kfree(zq);
+}
+EXPORT_SYMBOL(zcrypt_queue_free);
+
+static void zcrypt_queue_release(struct kref *kref)
+{
+ struct zcrypt_queue *zq =
+ container_of(kref, struct zcrypt_queue, refcount);
+ zcrypt_queue_free(zq);
+}
+
+void zcrypt_queue_get(struct zcrypt_queue *zq)
+{
+ kref_get(&zq->refcount);
+}
+EXPORT_SYMBOL(zcrypt_queue_get);
+
+int zcrypt_queue_put(struct zcrypt_queue *zq)
+{
+ return kref_put(&zq->refcount, zcrypt_queue_release);
+}
+EXPORT_SYMBOL(zcrypt_queue_put);
+
+/**
+ * zcrypt_queue_register() - Register a crypto queue device.
+ * @zq: Pointer to a crypto queue device
+ *
+ * Register a crypto queue device. Returns 0 if successful.
+ */
+int zcrypt_queue_register(struct zcrypt_queue *zq)
+{
+ struct zcrypt_card *zc;
+ int rc;
+
+ spin_lock(&zcrypt_list_lock);
+ zc = zq->queue->card->private;
+ zcrypt_card_get(zc);
+ zq->zcard = zc;
+ zq->online = 1; /* New devices are online by default. */
+
+ ZCRYPT_DBF(DBF_INFO, "queue=%02x.%04x register online=1\n",
+ AP_QID_CARD(zq->queue->qid), AP_QID_QUEUE(zq->queue->qid));
+
+ list_add_tail(&zq->list, &zc->zqueues);
+ zcrypt_device_count++;
+ spin_unlock(&zcrypt_list_lock);
+
+ rc = sysfs_create_group(&zq->queue->ap_dev.device.kobj,
+ &zcrypt_queue_attr_group);
+ if (rc)
+ goto out;
+ get_device(&zq->queue->ap_dev.device);
+
+ if (zq->ops->rng) {
+ rc = zcrypt_rng_device_add();
+ if (rc)
+ goto out_unregister;
+ }
+ return 0;
+
+out_unregister:
+ sysfs_remove_group(&zq->queue->ap_dev.device.kobj,
+ &zcrypt_queue_attr_group);
+ put_device(&zq->queue->ap_dev.device);
+out:
+ spin_lock(&zcrypt_list_lock);
+ list_del_init(&zq->list);
+ spin_unlock(&zcrypt_list_lock);
+ zcrypt_card_put(zc);
+ return rc;
+}
+EXPORT_SYMBOL(zcrypt_queue_register);
+
+/**
+ * zcrypt_queue_unregister(): Unregister a crypto queue device.
+ * @zq: Pointer to crypto queue device
+ *
+ * Unregister a crypto queue device.
+ */
+void zcrypt_queue_unregister(struct zcrypt_queue *zq)
+{
+ struct zcrypt_card *zc;
+
+ ZCRYPT_DBF(DBF_INFO, "queue=%02x.%04x unregister\n",
+ AP_QID_CARD(zq->queue->qid), AP_QID_QUEUE(zq->queue->qid));
+
+ zc = zq->zcard;
+ spin_lock(&zcrypt_list_lock);
+ list_del_init(&zq->list);
+ zcrypt_device_count--;
+ spin_unlock(&zcrypt_list_lock);
+ zcrypt_card_put(zc);
+ if (zq->ops->rng)
+ zcrypt_rng_device_remove();
+ sysfs_remove_group(&zq->queue->ap_dev.device.kobj,
+ &zcrypt_queue_attr_group);
+ put_device(&zq->queue->ap_dev.device);
+ zcrypt_queue_put(zq);
+}
+EXPORT_SYMBOL(zcrypt_queue_unregister);