mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 10:36:55 +07:00
cccd85bfb7
Rework the debug feature calls and initialization. There are now two debug feature entries used by the zcrypt code. The first is 'ap' with all the AP bus related stuff and the second is 'zcrypt' with all the zcrypt and devices and driver related entries. However, there isn't much traffic on both debug features. The ap bus code emits only some debug info and for zcrypt devices on appearance and disappearance there is an entry written. The new dbf invocations use the sprintf buffer layout, whereas the old implementation used the ascii dbf buffer. There are now 5*8=40 bytes used for each entry, resulting in 5 parameters per call. As the sprintf buffer needs a format string the first parameter provides this and so up to 4 more parameters can be used. Alltogehter the new layout should be much more human readable for customers and test. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
227 lines
5.5 KiB
C
227 lines
5.5 KiB
C
/*
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* zcrypt 2.1.0
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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 zcrypt_queue_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 = to_ap_queue(dev)->private;
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return snprintf(buf, PAGE_SIZE, "%d\n", zq->online);
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}
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static ssize_t zcrypt_queue_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 = to_ap_queue(dev)->private;
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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 && !zc->online)
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return -EINVAL;
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zq->online = online;
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ZCRYPT_DBF(DBF_INFO, "queue=%02x.%04x online=%d\n",
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AP_QID_CARD(zq->queue->qid),
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AP_QID_QUEUE(zq->queue->qid),
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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(online, 0644, zcrypt_queue_online_show,
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zcrypt_queue_online_store);
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static struct attribute *zcrypt_queue_attrs[] = {
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&dev_attr_online.attr,
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NULL,
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};
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static struct attribute_group zcrypt_queue_attr_group = {
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.attrs = zcrypt_queue_attrs,
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};
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void zcrypt_queue_force_online(struct zcrypt_queue *zq, int online)
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{
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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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}
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struct zcrypt_queue *zcrypt_queue_alloc(size_t max_response_size)
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{
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struct zcrypt_queue *zq;
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zq = kzalloc(sizeof(struct zcrypt_queue), GFP_KERNEL);
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if (!zq)
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return NULL;
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zq->reply.message = kmalloc(max_response_size, GFP_KERNEL);
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if (!zq->reply.message)
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goto out_free;
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zq->reply.length = max_response_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.message);
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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 = zq->queue->card->private;
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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(DBF_INFO, "queue=%02x.%04x register online=1\n",
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AP_QID_CARD(zq->queue->qid), AP_QID_QUEUE(zq->queue->qid));
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list_add_tail(&zq->list, &zc->zqueues);
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zcrypt_device_count++;
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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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get_device(&zq->queue->ap_dev.device);
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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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put_device(&zq->queue->ap_dev.device);
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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(DBF_INFO, "queue=%02x.%04x unregister\n",
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AP_QID_CARD(zq->queue->qid), 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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zcrypt_device_count--;
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spin_unlock(&zcrypt_list_lock);
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zcrypt_card_put(zc);
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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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put_device(&zq->queue->ap_dev.device);
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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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