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/*
* libqos driver framework
*
* Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>
*/
#include "qemu/osdep.h"
#include "libqtest.h"
#include "qemu/module.h"
#include "libqos/qgraph.h"
#include "libqos/virtio-net.h"
#include "hw/virtio/virtio-net.h"
static QGuestAllocator *alloc;
static void virtio_net_cleanup(QVirtioNet *interface)
{
int i;
for (i = 0; i < interface->n_queues; i++) {
qvirtqueue_cleanup(interface->vdev->bus, interface->queues[i], alloc);
}
g_free(interface->queues);
}
static void virtio_net_setup(QVirtioNet *interface)
{
QVirtioDevice *vdev = interface->vdev;
uint64_t features;
int i;
features = qvirtio_get_features(vdev);
features &= ~(QVIRTIO_F_BAD_FEATURE |
(1ull << VIRTIO_RING_F_INDIRECT_DESC) |
(1ull << VIRTIO_RING_F_EVENT_IDX));
qvirtio_set_features(vdev, features);
if (features & (1ull << VIRTIO_NET_F_MQ)) {
interface->n_queues = qvirtio_config_readw(vdev, 8) * 2;
} else {
interface->n_queues = 2;
}
interface->n_queues++; /* Account for the ctrl queue */
interface->queues = g_new(QVirtQueue *, interface->n_queues);
for (i = 0; i < interface->n_queues; i++) {
interface->queues[i] = qvirtqueue_setup(vdev, alloc, i);
}
qvirtio_set_driver_ok(vdev);
}
/* virtio-net-device */
static void qvirtio_net_device_destructor(QOSGraphObject *obj)
{
QVirtioNetDevice *v_net = (QVirtioNetDevice *) obj;
virtio_net_cleanup(&v_net->net);
}
static void qvirtio_net_device_start_hw(QOSGraphObject *obj)
{
QVirtioNetDevice *v_net = (QVirtioNetDevice *) obj;
QVirtioNet *interface = &v_net->net;
virtio_net_setup(interface);
}
static void *qvirtio_net_get_driver(QVirtioNet *v_net,
const char *interface)
{
if (!g_strcmp0(interface, "virtio-net")) {
return v_net;
}
if (!g_strcmp0(interface, "virtio")) {
return v_net->vdev;
}
fprintf(stderr, "%s not present in virtio-net-device\n", interface);
g_assert_not_reached();
}
static void *qvirtio_net_device_get_driver(void *object,
const char *interface)
{
QVirtioNetDevice *v_net = object;
return qvirtio_net_get_driver(&v_net->net, interface);
}
static void *virtio_net_device_create(void *virtio_dev,
QGuestAllocator *t_alloc,
void *addr)
{
QVirtioNetDevice *virtio_ndevice = g_new0(QVirtioNetDevice, 1);
QVirtioNet *interface = &virtio_ndevice->net;
interface->vdev = virtio_dev;
alloc = t_alloc;
virtio_ndevice->obj.destructor = qvirtio_net_device_destructor;
virtio_ndevice->obj.get_driver = qvirtio_net_device_get_driver;
virtio_ndevice->obj.start_hw = qvirtio_net_device_start_hw;
return &virtio_ndevice->obj;
}
/* virtio-net-pci */
static void qvirtio_net_pci_destructor(QOSGraphObject *obj)
{
QVirtioNetPCI *v_net = (QVirtioNetPCI *) obj;
QVirtioNet *interface = &v_net->net;
QOSGraphObject *pci_vobj = &v_net->pci_vdev.obj;
virtio_net_cleanup(interface);
qvirtio_pci_destructor(pci_vobj);
}
static void qvirtio_net_pci_start_hw(QOSGraphObject *obj)
{
QVirtioNetPCI *v_net = (QVirtioNetPCI *) obj;
QVirtioNet *interface = &v_net->net;
QOSGraphObject *pci_vobj = &v_net->pci_vdev.obj;
qvirtio_pci_start_hw(pci_vobj);
virtio_net_setup(interface);
}
static void *qvirtio_net_pci_get_driver(void *object,
const char *interface)
{
QVirtioNetPCI *v_net = object;
if (!g_strcmp0(interface, "pci-device")) {
return v_net->pci_vdev.pdev;
}
return qvirtio_net_get_driver(&v_net->net, interface);
}
static void *virtio_net_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
void *addr)
{
QVirtioNetPCI *virtio_bpci = g_new0(QVirtioNetPCI, 1);
QVirtioNet *interface = &virtio_bpci->net;
QOSGraphObject *obj = &virtio_bpci->pci_vdev.obj;
virtio_pci_init(&virtio_bpci->pci_vdev, pci_bus, addr);
interface->vdev = &virtio_bpci->pci_vdev.vdev;
alloc = t_alloc;
g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_NET);
obj->destructor = qvirtio_net_pci_destructor;
obj->start_hw = qvirtio_net_pci_start_hw;
obj->get_driver = qvirtio_net_pci_get_driver;
return obj;
}
static void virtio_net_register_nodes(void)
{
/* FIXME: every test using these nodes needs to setup a
* -netdev socket,id=hs0 otherwise QEMU is not going to start.
* Therefore, we do not include "produces" edge for virtio
* and pci-device yet.
*/
QPCIAddress addr = {
.devfn = QPCI_DEVFN(4, 0),
};
QOSGraphEdgeOptions opts = { };
/* virtio-net-device */
opts.extra_device_opts = "netdev=hs0";
qos_node_create_driver("virtio-net-device",
virtio_net_device_create);
qos_node_consumes("virtio-net-device", "virtio-bus", &opts);
qos_node_produces("virtio-net-device", "virtio-net");
/* virtio-net-pci */
opts.extra_device_opts = "netdev=hs0,addr=04.0";
add_qpci_address(&opts, &addr);
qos_node_create_driver("virtio-net-pci", virtio_net_pci_create);
qos_node_consumes("virtio-net-pci", "pci-bus", &opts);
qos_node_produces("virtio-net-pci", "virtio-net");
}
libqos_init(virtio_net_register_nodes);
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