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/*
* Virtio IOMMU PCI Bindings
*
* Copyright (c) 2019 Red Hat, Inc.
* Written by Eric Auger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 or
* (at your option) any later version.
*/
#include "qemu/osdep.h"
#include "hw/virtio/virtio-pci.h"
#include "hw/virtio/virtio-iommu.h"
#include "hw/qdev-properties.h"
#include "hw/qdev-properties-system.h"
#include "qapi/error.h"
#include "hw/boards.h"
#include "hw/pci/pci_bus.h"
#include "qom/object.h"
typedef struct VirtIOIOMMUPCI VirtIOIOMMUPCI;
/*
* virtio-iommu-pci: This extends VirtioPCIProxy.
*
*/
DECLARE_INSTANCE_CHECKER(VirtIOIOMMUPCI, VIRTIO_IOMMU_PCI,
TYPE_VIRTIO_IOMMU_PCI)
struct VirtIOIOMMUPCI {
VirtIOPCIProxy parent_obj;
VirtIOIOMMU vdev;
};
static Property virtio_iommu_pci_properties[] = {
DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
DEFINE_PROP_ARRAY("reserved-regions", VirtIOIOMMUPCI,
vdev.nb_reserved_regions, vdev.reserved_regions,
qdev_prop_reserved_region, ReservedRegion),
DEFINE_PROP_END_OF_LIST(),
};
static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
{
VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev);
PCIBus *pbus = pci_get_bus(&vpci_dev->pci_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
VirtIOIOMMU *s = VIRTIO_IOMMU(vdev);
if (!qdev_get_machine_hotplug_handler(DEVICE(vpci_dev))) {
error_setg(errp, "Check your machine implements a hotplug handler "
"for the virtio-iommu-pci device");
return;
}
for (int i = 0; i < s->nb_reserved_regions; i++) {
if (s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_RESERVED &&
s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_MSI) {
error_setg(errp, "reserved region %d has an invalid type", i);
error_append_hint(errp, "Valid values are 0 and 1\n");
return;
}
}
if (!pci_bus_is_root(pbus)) {
error_setg(errp, "virtio-iommu-pci must be plugged on the root bus");
return;
}
object_property_set_link(OBJECT(dev), "primary-bus",
OBJECT(pbus), &error_abort);
virtio_pci_force_virtio_1(vpci_dev);
qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
}
static void virtio_iommu_pci_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
k->realize = virtio_iommu_pci_realize;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
device_class_set_props(dc, virtio_iommu_pci_properties);
pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
pcidev_k->class_id = PCI_CLASS_OTHERS;
dc->hotpluggable = false;
}
static void virtio_iommu_pci_instance_init(Object *obj)
{
VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(obj);
virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
TYPE_VIRTIO_IOMMU);
}
static const VirtioPCIDeviceTypeInfo virtio_iommu_pci_info = {
.generic_name = TYPE_VIRTIO_IOMMU_PCI,
.instance_size = sizeof(VirtIOIOMMUPCI),
.instance_init = virtio_iommu_pci_instance_init,
.class_init = virtio_iommu_pci_class_init,
};
static void virtio_iommu_pci_register(void)
{
virtio_pci_types_register(&virtio_iommu_pci_info);
}
type_init(virtio_iommu_pci_register)
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