summaryrefslogtreecommitdiff
path: root/drivers/s390/crypto/zcrypt_queue.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/s390/crypto/zcrypt_queue.c')
-rw-r--r--drivers/s390/crypto/zcrypt_queue.c108
1 files changed, 58 insertions, 50 deletions
diff --git a/drivers/s390/crypto/zcrypt_queue.c b/drivers/s390/crypto/zcrypt_queue.c
index a303f3b2c328..a173d32eb6e8 100644
--- a/drivers/s390/crypto/zcrypt_queue.c
+++ b/drivers/s390/crypto/zcrypt_queue.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>
@@ -47,70 +36,92 @@
* Device attributes common for all crypto queue devices.
*/
-static ssize_t zcrypt_queue_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_queue *zq = to_ap_queue(dev)->private;
+ struct zcrypt_queue *zq = dev_get_drvdata(dev);
+ struct ap_queue *aq = to_ap_queue(dev);
+ int online = aq->config && !aq->chkstop && zq->online ? 1 : 0;
- return snprintf(buf, PAGE_SIZE, "%d\n", zq->online);
+ return sysfs_emit(buf, "%d\n", online);
}
-static ssize_t zcrypt_queue_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_queue *zq = to_ap_queue(dev)->private;
+ struct zcrypt_queue *zq = dev_get_drvdata(dev);
+ struct ap_queue *aq = to_ap_queue(dev);
struct zcrypt_card *zc = zq->zcard;
int online;
if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
return -EINVAL;
+ if (online && (!aq->config || !aq->card->config ||
+ aq->chkstop || aq->card->chkstop))
+ return -ENODEV;
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);
+ ZCRYPT_DBF_INFO("%s queue=%02x.%04x online=%d\n",
+ __func__, AP_QID_CARD(zq->queue->qid),
+ AP_QID_QUEUE(zq->queue->qid), online);
+
+ ap_send_online_uevent(&aq->ap_dev, online);
if (!online)
ap_flush_queue(zq->queue);
return count;
}
-static DEVICE_ATTR(online, 0644, zcrypt_queue_online_show,
- zcrypt_queue_online_store);
+static DEVICE_ATTR_RW(online);
+
+static ssize_t load_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct zcrypt_queue *zq = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%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 struct attribute_group zcrypt_queue_attr_group = {
+static const struct attribute_group zcrypt_queue_attr_group = {
.attrs = zcrypt_queue_attrs,
};
-void zcrypt_queue_force_online(struct zcrypt_queue *zq, int online)
+bool zcrypt_queue_force_online(struct zcrypt_queue *zq, int online)
{
- zq->online = online;
- if (!online)
- ap_flush_queue(zq->queue);
+ if (!!zq->online != !!online) {
+ zq->online = online;
+ if (!online)
+ ap_flush_queue(zq->queue);
+ return true;
+ }
+ return false;
}
-struct zcrypt_queue *zcrypt_queue_alloc(size_t max_response_size)
+struct zcrypt_queue *zcrypt_queue_alloc(size_t reply_buf_size)
{
struct zcrypt_queue *zq;
- zq = kzalloc(sizeof(struct zcrypt_queue), GFP_KERNEL);
+ zq = kzalloc(sizeof(*zq), GFP_KERNEL);
if (!zq)
return NULL;
- zq->reply.message = kmalloc(max_response_size, GFP_KERNEL);
- if (!zq->reply.message)
+ zq->reply.msg = kmalloc(reply_buf_size, GFP_KERNEL);
+ if (!zq->reply.msg)
goto out_free;
- zq->reply.length = max_response_size;
+ zq->reply.bufsize = reply_buf_size;
INIT_LIST_HEAD(&zq->list);
kref_init(&zq->refcount);
return zq;
@@ -123,7 +134,7 @@ EXPORT_SYMBOL(zcrypt_queue_alloc);
void zcrypt_queue_free(struct zcrypt_queue *zq)
{
- kfree(zq->reply.message);
+ kfree(zq->reply.msg);
kfree(zq);
}
EXPORT_SYMBOL(zcrypt_queue_free);
@@ -159,23 +170,22 @@ int zcrypt_queue_register(struct zcrypt_queue *zq)
int rc;
spin_lock(&zcrypt_list_lock);
- zc = zq->queue->card->private;
+ zc = dev_get_drvdata(&zq->queue->card->ap_dev.device);
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));
+ ZCRYPT_DBF_INFO("%s queue=%02x.%04x register online=1\n",
+ __func__, 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();
@@ -187,7 +197,6 @@ int zcrypt_queue_register(struct zcrypt_queue *zq)
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);
@@ -207,20 +216,19 @@ 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));
+ ZCRYPT_DBF_INFO("%s queue=%02x.%04x unregister\n",
+ __func__, 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_card_put(zc);
zcrypt_queue_put(zq);
}
EXPORT_SYMBOL(zcrypt_queue_unregister);
generated by cgit (git 2.34.1) at 2025-12-25 02:12:42 +0000