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path: root/drivers/s390/crypto/zcrypt_card.c
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Diffstat (limited to 'drivers/s390/crypto/zcrypt_card.c')
-rw-r--r--drivers/s390/crypto/zcrypt_card.c120
1 files changed, 79 insertions, 41 deletions
diff --git a/drivers/s390/crypto/zcrypt_card.c b/drivers/s390/crypto/zcrypt_card.c
index 53436ea52230..6dea702a5cac 100644
--- a/drivers/s390/crypto/zcrypt_card.c
+++ b/drivers/s390/crypto/zcrypt_card.c
@@ -1,6 +1,5 @@
+// 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)
@@ -10,18 +9,9 @@
* 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>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
*/
+#include <linux/export.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
@@ -29,7 +19,6 @@
#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>
@@ -47,58 +36,101 @@
* Device attributes common for all crypto card devices.
*/
-static ssize_t zcrypt_card_type_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t type_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- struct zcrypt_card *zc = to_ap_card(dev)->private;
+ struct zcrypt_card *zc = dev_get_drvdata(dev);
- return snprintf(buf, PAGE_SIZE, "%s\n", zc->type_string);
+ return sysfs_emit(buf, "%s\n", zc->type_string);
}
-static DEVICE_ATTR(type, 0444, zcrypt_card_type_show, NULL);
+static DEVICE_ATTR_RO(type);
-static ssize_t zcrypt_card_online_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t online_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
- struct zcrypt_card *zc = to_ap_card(dev)->private;
+ struct zcrypt_card *zc = dev_get_drvdata(dev);
+ struct ap_card *ac = to_ap_card(dev);
+ int online = ac->config && !ac->chkstop && zc->online ? 1 : 0;
- return snprintf(buf, PAGE_SIZE, "%d\n", zc->online);
+ return sysfs_emit(buf, "%d\n", online);
}
-static ssize_t zcrypt_card_online_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static ssize_t online_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
- struct zcrypt_card *zc = to_ap_card(dev)->private;
+ struct zcrypt_card *zc = dev_get_drvdata(dev);
+ struct ap_card *ac = to_ap_card(dev);
struct zcrypt_queue *zq;
- int online, id;
+ int online, id, i = 0, maxzqs = 0;
+ struct zcrypt_queue **zq_uelist = NULL;
if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
return -EINVAL;
+ if (online && (!ac->config || ac->chkstop))
+ return -ENODEV;
+
zc->online = online;
id = zc->card->id;
- ZCRYPT_DBF(DBF_INFO, "card=%02x online=%d\n", id, online);
+ ZCRYPT_DBF_INFO("%s card=%02x online=%d\n", __func__, id, online);
+
+ ap_send_online_uevent(&ac->ap_dev, online);
spin_lock(&zcrypt_list_lock);
+ /*
+ * As we are in atomic context here, directly sending uevents
+ * does not work. So collect the zqueues in a dynamic array
+ * and process them after zcrypt_list_lock release. As we get/put
+ * the zqueue objects, we make sure they exist after lock release.
+ */
list_for_each_entry(zq, &zc->zqueues, list)
- zcrypt_queue_force_online(zq, online);
+ maxzqs++;
+ if (maxzqs > 0)
+ zq_uelist = kcalloc(maxzqs + 1, sizeof(*zq_uelist), GFP_ATOMIC);
+ list_for_each_entry(zq, &zc->zqueues, list)
+ if (zcrypt_queue_force_online(zq, online))
+ if (zq_uelist) {
+ zcrypt_queue_get(zq);
+ zq_uelist[i++] = zq;
+ }
spin_unlock(&zcrypt_list_lock);
+ if (zq_uelist) {
+ for (i = 0; zq_uelist[i]; i++) {
+ zq = zq_uelist[i];
+ ap_send_online_uevent(&zq->queue->ap_dev, online);
+ zcrypt_queue_put(zq);
+ }
+ kfree(zq_uelist);
+ }
+
return count;
}
-static DEVICE_ATTR(online, 0644, zcrypt_card_online_show,
- zcrypt_card_online_store);
+static DEVICE_ATTR_RW(online);
+
+static ssize_t load_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct zcrypt_card *zc = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%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 struct attribute_group zcrypt_card_attr_group = {
+static const struct attribute_group zcrypt_card_attr_group = {
.attrs = zcrypt_card_attrs,
};
@@ -106,7 +138,7 @@ struct zcrypt_card *zcrypt_card_alloc(void)
{
struct zcrypt_card *zc;
- zc = kzalloc(sizeof(struct zcrypt_card), GFP_KERNEL);
+ zc = kzalloc(sizeof(*zc), GFP_KERNEL);
if (!zc)
return NULL;
INIT_LIST_HEAD(&zc->list);
@@ -151,18 +183,22 @@ int zcrypt_card_register(struct zcrypt_card *zc)
{
int rc;
- rc = sysfs_create_group(&zc->card->ap_dev.device.kobj,
- &zcrypt_card_attr_group);
- if (rc)
- return 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);
+ ZCRYPT_DBF_INFO("%s card=%02x register online=1\n",
+ __func__, 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;
}
@@ -176,12 +212,14 @@ EXPORT_SYMBOL(zcrypt_card_register);
*/
void zcrypt_card_unregister(struct zcrypt_card *zc)
{
- ZCRYPT_DBF(DBF_INFO, "card=%02x unregister\n", zc->card->id);
+ ZCRYPT_DBF_INFO("%s card=%02x unregister\n",
+ __func__, 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);
generated by cgit (git 2.34.1) at 2025-12-26 00:59:30 +0000