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![Harald Freudenberger](/assets/img/avatar_default.png)
This patch tries to fix as much as possible of the checkpatch.pl --strict findings: CHECK: Logical continuations should be on the previous line CHECK: No space is necessary after a cast CHECK: Alignment should match open parenthesis CHECK: 'useable' may be misspelled - perhaps 'usable'? WARNING: Possible repeated word: 'is' CHECK: spaces preferred around that '*' (ctx:VxV) CHECK: Comparison to NULL could be written "!msg" CHECK: Prefer kzalloc(sizeof(*zc)...) over kzalloc(sizeof(struct...)...) CHECK: Unnecessary parentheses around resp_type->work CHECK: Avoid CamelCase: <xcRB> There is no functional change comming with this patch, only code cleanup, renaming, whitespaces, indenting, ... but no semantic change in any way. Also the API (zcrypt and pkey header file) is semantically unchanged. Signed-off-by: Harald Freudenberger <freude@linux.ibm.com> Reviewed-by: Jürgen Christ <jchrist@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
233 lines
5.4 KiB
C
233 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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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 queue devices.
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*/
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static ssize_t 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_queue *zq = dev_get_drvdata(dev);
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struct ap_queue *aq = to_ap_queue(dev);
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int online = aq->config && zq->online ? 1 : 0;
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return scnprintf(buf, PAGE_SIZE, "%d\n", online);
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}
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static ssize_t 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_queue *zq = dev_get_drvdata(dev);
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struct ap_queue *aq = to_ap_queue(dev);
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struct zcrypt_card *zc = zq->zcard;
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int online;
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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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if (online && (!aq->config || !aq->card->config))
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return -ENODEV;
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if (online && !zc->online)
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return -EINVAL;
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zq->online = online;
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ZCRYPT_DBF_INFO("%s queue=%02x.%04x online=%d\n",
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__func__, AP_QID_CARD(zq->queue->qid),
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AP_QID_QUEUE(zq->queue->qid), online);
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ap_send_online_uevent(&aq->ap_dev, online);
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if (!online)
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ap_flush_queue(zq->queue);
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return count;
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}
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static DEVICE_ATTR_RW(online);
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static ssize_t load_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_queue *zq = dev_get_drvdata(dev);
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return scnprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zq->load));
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}
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static DEVICE_ATTR_RO(load);
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static struct attribute *zcrypt_queue_attrs[] = {
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&dev_attr_online.attr,
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&dev_attr_load.attr,
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NULL,
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};
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static const struct attribute_group zcrypt_queue_attr_group = {
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.attrs = zcrypt_queue_attrs,
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};
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bool zcrypt_queue_force_online(struct zcrypt_queue *zq, int online)
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{
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if (!!zq->online != !!online) {
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zq->online = online;
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if (!online)
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ap_flush_queue(zq->queue);
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return true;
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}
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return false;
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}
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struct zcrypt_queue *zcrypt_queue_alloc(size_t reply_buf_size)
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{
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struct zcrypt_queue *zq;
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zq = kzalloc(sizeof(*zq), GFP_KERNEL);
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if (!zq)
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return NULL;
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zq->reply.msg = kmalloc(reply_buf_size, GFP_KERNEL);
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if (!zq->reply.msg)
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goto out_free;
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zq->reply.bufsize = reply_buf_size;
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INIT_LIST_HEAD(&zq->list);
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kref_init(&zq->refcount);
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return zq;
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out_free:
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kfree(zq);
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return NULL;
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}
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EXPORT_SYMBOL(zcrypt_queue_alloc);
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void zcrypt_queue_free(struct zcrypt_queue *zq)
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{
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kfree(zq->reply.msg);
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kfree(zq);
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}
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EXPORT_SYMBOL(zcrypt_queue_free);
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static void zcrypt_queue_release(struct kref *kref)
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{
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struct zcrypt_queue *zq =
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container_of(kref, struct zcrypt_queue, refcount);
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zcrypt_queue_free(zq);
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}
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void zcrypt_queue_get(struct zcrypt_queue *zq)
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{
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kref_get(&zq->refcount);
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}
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EXPORT_SYMBOL(zcrypt_queue_get);
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int zcrypt_queue_put(struct zcrypt_queue *zq)
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{
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return kref_put(&zq->refcount, zcrypt_queue_release);
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}
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EXPORT_SYMBOL(zcrypt_queue_put);
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/**
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* zcrypt_queue_register() - Register a crypto queue device.
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* @zq: Pointer to a crypto queue device
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*
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* Register a crypto queue device. Returns 0 if successful.
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*/
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int zcrypt_queue_register(struct zcrypt_queue *zq)
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{
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struct zcrypt_card *zc;
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int rc;
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spin_lock(&zcrypt_list_lock);
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zc = dev_get_drvdata(&zq->queue->card->ap_dev.device);
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zcrypt_card_get(zc);
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zq->zcard = zc;
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zq->online = 1; /* New devices are online by default. */
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ZCRYPT_DBF_INFO("%s queue=%02x.%04x register online=1\n",
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__func__, AP_QID_CARD(zq->queue->qid),
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AP_QID_QUEUE(zq->queue->qid));
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list_add_tail(&zq->list, &zc->zqueues);
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spin_unlock(&zcrypt_list_lock);
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rc = sysfs_create_group(&zq->queue->ap_dev.device.kobj,
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&zcrypt_queue_attr_group);
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if (rc)
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goto out;
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if (zq->ops->rng) {
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rc = zcrypt_rng_device_add();
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if (rc)
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goto out_unregister;
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}
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return 0;
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out_unregister:
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sysfs_remove_group(&zq->queue->ap_dev.device.kobj,
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&zcrypt_queue_attr_group);
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out:
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spin_lock(&zcrypt_list_lock);
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list_del_init(&zq->list);
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spin_unlock(&zcrypt_list_lock);
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zcrypt_card_put(zc);
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return rc;
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}
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EXPORT_SYMBOL(zcrypt_queue_register);
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/**
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* zcrypt_queue_unregister(): Unregister a crypto queue device.
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* @zq: Pointer to crypto queue device
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*
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* Unregister a crypto queue device.
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*/
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void zcrypt_queue_unregister(struct zcrypt_queue *zq)
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{
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struct zcrypt_card *zc;
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ZCRYPT_DBF_INFO("%s queue=%02x.%04x unregister\n",
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__func__, AP_QID_CARD(zq->queue->qid),
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AP_QID_QUEUE(zq->queue->qid));
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zc = zq->zcard;
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spin_lock(&zcrypt_list_lock);
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list_del_init(&zq->list);
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spin_unlock(&zcrypt_list_lock);
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if (zq->ops->rng)
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zcrypt_rng_device_remove();
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sysfs_remove_group(&zq->queue->ap_dev.device.kobj,
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&zcrypt_queue_attr_group);
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zcrypt_card_put(zc);
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zcrypt_queue_put(zq);
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}
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EXPORT_SYMBOL(zcrypt_queue_unregister);
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