Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 197 insertions, 0 deletions

diff --git a/drivers/s390/crypto/zcrypt_card.c b/drivers/s390/crypto/zcrypt_card.c
new file mode 100644
index 000000000..09fe6bb88
--- /dev/null
+++ b/drivers/s390/crypto/zcrypt_card.c
@@ -0,0 +1,197 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  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 card devices.
+ */
+
+static ssize_t type_show(struct device *dev,
+			 struct device_attribute *attr, char *buf)
+{
+	struct zcrypt_card *zc = to_ap_card(dev)->private;
+
+	return scnprintf(buf, PAGE_SIZE, "%s\n", zc->type_string);
+}
+
+static DEVICE_ATTR_RO(type);
+
+static ssize_t online_show(struct device *dev,
+			   struct device_attribute *attr,
+			   char *buf)
+{
+	struct ap_card *ac = to_ap_card(dev);
+	struct zcrypt_card *zc = ac->private;
+	int online = ac->config && zc->online ? 1 : 0;
+
+	return scnprintf(buf, PAGE_SIZE, "%d\n", online);
+}
+
+static ssize_t online_store(struct device *dev,
+			    struct device_attribute *attr,
+			    const char *buf, size_t count)
+{
+	struct ap_card *ac = to_ap_card(dev);
+	struct zcrypt_card *zc = ac->private;
+	struct zcrypt_queue *zq;
+	int online, id;
+
+	if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
+		return -EINVAL;
+
+	if (online && !ac->config)
+		return -ENODEV;
+
+	zc->online = online;
+	id = zc->card->id;
+
+	ZCRYPT_DBF(DBF_INFO, "card=%02x online=%d\n", id, online);
+
+	spin_lock(&zcrypt_list_lock);
+	list_for_each_entry(zq, &zc->zqueues, list)
+		zcrypt_queue_force_online(zq, online);
+	spin_unlock(&zcrypt_list_lock);
+	return count;
+}
+
+static DEVICE_ATTR_RW(online);
+
+static ssize_t load_show(struct device *dev,
+			 struct device_attribute *attr,
+			 char *buf)
+{
+	struct zcrypt_card *zc = to_ap_card(dev)->private;
+
+	return scnprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zc->load));
+}
+
+static DEVICE_ATTR_RO(load);
+
+static struct attribute *zcrypt_card_attrs[] = {
+	&dev_attr_type.attr,
+	&dev_attr_online.attr,
+	&dev_attr_load.attr,
+	NULL,
+};
+
+static const struct attribute_group zcrypt_card_attr_group = {
+	.attrs = zcrypt_card_attrs,
+};
+
+struct zcrypt_card *zcrypt_card_alloc(void)
+{
+	struct zcrypt_card *zc;
+
+	zc = kzalloc(sizeof(struct zcrypt_card), GFP_KERNEL);
+	if (!zc)
+		return NULL;
+	INIT_LIST_HEAD(&zc->list);
+	INIT_LIST_HEAD(&zc->zqueues);
+	kref_init(&zc->refcount);
+	return zc;
+}
+EXPORT_SYMBOL(zcrypt_card_alloc);
+
+void zcrypt_card_free(struct zcrypt_card *zc)
+{
+	kfree(zc);
+}
+EXPORT_SYMBOL(zcrypt_card_free);
+
+static void zcrypt_card_release(struct kref *kref)
+{
+	struct zcrypt_card *zdev =
+		container_of(kref, struct zcrypt_card, refcount);
+	zcrypt_card_free(zdev);
+}
+
+void zcrypt_card_get(struct zcrypt_card *zc)
+{
+	kref_get(&zc->refcount);
+}
+EXPORT_SYMBOL(zcrypt_card_get);
+
+int zcrypt_card_put(struct zcrypt_card *zc)
+{
+	return kref_put(&zc->refcount, zcrypt_card_release);
+}
+EXPORT_SYMBOL(zcrypt_card_put);
+
+/**
+ * zcrypt_card_register() - Register a crypto card device.
+ * @zc: Pointer to a crypto card device
+ *
+ * Register a crypto card device. Returns 0 if successful.
+ */
+int zcrypt_card_register(struct zcrypt_card *zc)
+{
+	int rc;
+
+	spin_lock(&zcrypt_list_lock);
+	list_add_tail(&zc->list, &zcrypt_card_list);
+	spin_unlock(&zcrypt_list_lock);
+
+	zc->online = 1;
+
+	ZCRYPT_DBF(DBF_INFO, "card=%02x register online=1\n", zc->card->id);
+
+	rc = sysfs_create_group(&zc->card->ap_dev.device.kobj,
+				&zcrypt_card_attr_group);
+	if (rc) {
+		spin_lock(&zcrypt_list_lock);
+		list_del_init(&zc->list);
+		spin_unlock(&zcrypt_list_lock);
+	}
+
+	return rc;
+}
+EXPORT_SYMBOL(zcrypt_card_register);
+
+/**
+ * zcrypt_card_unregister(): Unregister a crypto card device.
+ * @zc: Pointer to crypto card device
+ *
+ * Unregister a crypto card device.
+ */
+void zcrypt_card_unregister(struct zcrypt_card *zc)
+{
+	ZCRYPT_DBF(DBF_INFO, "card=%02x unregister\n", zc->card->id);
+
+	spin_lock(&zcrypt_list_lock);
+	list_del_init(&zc->list);
+	spin_unlock(&zcrypt_list_lock);
+	sysfs_remove_group(&zc->card->ap_dev.device.kobj,
+			   &zcrypt_card_attr_group);
+	zcrypt_card_put(zc);
+}
+EXPORT_SYMBOL(zcrypt_card_unregister);