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/*
* Virtio crypto Support
*
* Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
*
* Authors:
* Gonglei <arei.gonglei@huawei.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* (at your option) any later version. See the COPYING file in the
* top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/iov.h"
#include "hw/qdev.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "hw/virtio/virtio.h"
#include "hw/virtio/virtio-crypto.h"
#include "hw/virtio/virtio-access.h"
#include "standard-headers/linux/virtio_ids.h"
#define VIRTIO_CRYPTO_VM_VERSION 1
static uint64_t virtio_crypto_get_features(VirtIODevice *vdev,
uint64_t features,
Error **errp)
{
return features;
}
static void virtio_crypto_reset(VirtIODevice *vdev)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
/* multiqueue is disabled by default */
vcrypto->curr_queues = 1;
if (!vcrypto->cryptodev->ready) {
vcrypto->status &= ~VIRTIO_CRYPTO_S_HW_READY;
} else {
vcrypto->status |= VIRTIO_CRYPTO_S_HW_READY;
}
}
static void virtio_crypto_device_realize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev);
int i;
vcrypto->cryptodev = vcrypto->conf.cryptodev;
if (vcrypto->cryptodev == NULL) {
error_setg(errp, "'cryptodev' parameter expects a valid object");
return;
}
vcrypto->max_queues = MAX(vcrypto->cryptodev->conf.peers.queues, 1);
if (vcrypto->max_queues + 1 > VIRTIO_QUEUE_MAX) {
error_setg(errp, "Invalid number of queues (= %" PRIu32 "), "
"must be a postive integer less than %d.",
vcrypto->max_queues, VIRTIO_QUEUE_MAX);
return;
}
virtio_init(vdev, "virtio-crypto", VIRTIO_ID_CRYPTO, vcrypto->config_size);
vcrypto->curr_queues = 1;
for (i = 0; i < vcrypto->max_queues; i++) {
virtio_add_queue(vdev, 1024, NULL);
}
vcrypto->ctrl_vq = virtio_add_queue(vdev, 64, NULL);
if (!vcrypto->cryptodev->ready) {
vcrypto->status &= ~VIRTIO_CRYPTO_S_HW_READY;
} else {
vcrypto->status |= VIRTIO_CRYPTO_S_HW_READY;
}
}
static void virtio_crypto_device_unrealize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
virtio_cleanup(vdev);
}
static const VMStateDescription vmstate_virtio_crypto = {
.name = "virtio-crypto",
.minimum_version_id = VIRTIO_CRYPTO_VM_VERSION,
.version_id = VIRTIO_CRYPTO_VM_VERSION,
.fields = (VMStateField[]) {
VMSTATE_VIRTIO_DEVICE,
VMSTATE_END_OF_LIST()
},
};
static Property virtio_crypto_properties[] = {
DEFINE_PROP_END_OF_LIST(),
};
static void virtio_crypto_get_config(VirtIODevice *vdev, uint8_t *config)
{
}
static void virtio_crypto_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
dc->props = virtio_crypto_properties;
dc->vmsd = &vmstate_virtio_crypto;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
vdc->realize = virtio_crypto_device_realize;
vdc->unrealize = virtio_crypto_device_unrealize;
vdc->get_config = virtio_crypto_get_config;
vdc->get_features = virtio_crypto_get_features;
vdc->reset = virtio_crypto_reset;
}
static void virtio_crypto_instance_init(Object *obj)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(obj);
/*
* The default config_size is sizeof(struct virtio_crypto_config).
* Can be overriden with virtio_crypto_set_config_size.
*/
vcrypto->config_size = sizeof(struct virtio_crypto_config);
object_property_add_link(obj, "cryptodev",
TYPE_CRYPTODEV_BACKEND,
(Object **)&vcrypto->conf.cryptodev,
qdev_prop_allow_set_link_before_realize,
OBJ_PROP_LINK_UNREF_ON_RELEASE, NULL);
}
static const TypeInfo virtio_crypto_info = {
.name = TYPE_VIRTIO_CRYPTO,
.parent = TYPE_VIRTIO_DEVICE,
.instance_size = sizeof(VirtIOCrypto),
.instance_init = virtio_crypto_instance_init,
.class_init = virtio_crypto_class_init,
};
static void virtio_register_types(void)
{
type_register_static(&virtio_crypto_info);
}
type_init(virtio_register_types)
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