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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>
225 lines
5.3 KiB
C
225 lines
5.3 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 card devices.
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*/
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static ssize_t type_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct zcrypt_card *zc = dev_get_drvdata(dev);
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return scnprintf(buf, PAGE_SIZE, "%s\n", zc->type_string);
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}
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static DEVICE_ATTR_RO(type);
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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_card *zc = dev_get_drvdata(dev);
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struct ap_card *ac = to_ap_card(dev);
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int online = ac->config && zc->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_card *zc = dev_get_drvdata(dev);
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struct ap_card *ac = to_ap_card(dev);
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struct zcrypt_queue *zq;
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int online, id, i = 0, maxzqs = 0;
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struct zcrypt_queue **zq_uelist = NULL;
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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 && !ac->config)
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return -ENODEV;
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zc->online = online;
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id = zc->card->id;
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ZCRYPT_DBF_INFO("%s card=%02x online=%d\n", __func__, id, online);
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ap_send_online_uevent(&ac->ap_dev, online);
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spin_lock(&zcrypt_list_lock);
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/*
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* As we are in atomic context here, directly sending uevents
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* does not work. So collect the zqueues in a dynamic array
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* and process them after zcrypt_list_lock release. As we get/put
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* the zqueue objects, we make sure they exist after lock release.
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*/
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list_for_each_entry(zq, &zc->zqueues, list)
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maxzqs++;
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if (maxzqs > 0)
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zq_uelist = kcalloc(maxzqs + 1, sizeof(*zq_uelist), GFP_ATOMIC);
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list_for_each_entry(zq, &zc->zqueues, list)
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if (zcrypt_queue_force_online(zq, online))
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if (zq_uelist) {
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zcrypt_queue_get(zq);
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zq_uelist[i++] = zq;
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}
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spin_unlock(&zcrypt_list_lock);
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if (zq_uelist) {
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for (i = 0; zq_uelist[i]; i++) {
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zq = zq_uelist[i];
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ap_send_online_uevent(&zq->queue->ap_dev, online);
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zcrypt_queue_put(zq);
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}
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kfree(zq_uelist);
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}
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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_card *zc = dev_get_drvdata(dev);
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return scnprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zc->load));
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}
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static DEVICE_ATTR_RO(load);
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static struct attribute *zcrypt_card_attrs[] = {
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&dev_attr_type.attr,
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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_card_attr_group = {
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.attrs = zcrypt_card_attrs,
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};
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struct zcrypt_card *zcrypt_card_alloc(void)
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{
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struct zcrypt_card *zc;
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zc = kzalloc(sizeof(*zc), GFP_KERNEL);
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if (!zc)
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return NULL;
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INIT_LIST_HEAD(&zc->list);
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INIT_LIST_HEAD(&zc->zqueues);
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kref_init(&zc->refcount);
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return zc;
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}
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EXPORT_SYMBOL(zcrypt_card_alloc);
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void zcrypt_card_free(struct zcrypt_card *zc)
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{
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kfree(zc);
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}
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EXPORT_SYMBOL(zcrypt_card_free);
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static void zcrypt_card_release(struct kref *kref)
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{
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struct zcrypt_card *zdev =
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container_of(kref, struct zcrypt_card, refcount);
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zcrypt_card_free(zdev);
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}
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void zcrypt_card_get(struct zcrypt_card *zc)
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{
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kref_get(&zc->refcount);
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}
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EXPORT_SYMBOL(zcrypt_card_get);
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int zcrypt_card_put(struct zcrypt_card *zc)
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{
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return kref_put(&zc->refcount, zcrypt_card_release);
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}
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EXPORT_SYMBOL(zcrypt_card_put);
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/**
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* zcrypt_card_register() - Register a crypto card device.
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* @zc: Pointer to a crypto card device
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*
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* Register a crypto card device. Returns 0 if successful.
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*/
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int zcrypt_card_register(struct zcrypt_card *zc)
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{
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int rc;
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spin_lock(&zcrypt_list_lock);
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list_add_tail(&zc->list, &zcrypt_card_list);
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spin_unlock(&zcrypt_list_lock);
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zc->online = 1;
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ZCRYPT_DBF_INFO("%s card=%02x register online=1\n",
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__func__, zc->card->id);
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rc = sysfs_create_group(&zc->card->ap_dev.device.kobj,
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&zcrypt_card_attr_group);
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if (rc) {
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spin_lock(&zcrypt_list_lock);
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list_del_init(&zc->list);
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spin_unlock(&zcrypt_list_lock);
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}
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return rc;
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}
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EXPORT_SYMBOL(zcrypt_card_register);
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/**
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* zcrypt_card_unregister(): Unregister a crypto card device.
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* @zc: Pointer to crypto card device
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*
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* Unregister a crypto card device.
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*/
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void zcrypt_card_unregister(struct zcrypt_card *zc)
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{
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ZCRYPT_DBF_INFO("%s card=%02x unregister\n",
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__func__, zc->card->id);
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spin_lock(&zcrypt_list_lock);
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list_del_init(&zc->list);
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spin_unlock(&zcrypt_list_lock);
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sysfs_remove_group(&zc->card->ap_dev.device.kobj,
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&zcrypt_card_attr_group);
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zcrypt_card_put(zc);
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}
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EXPORT_SYMBOL(zcrypt_card_unregister);
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