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/*
* Virtio MEM PCI device
*
* Copyright (C) 2020 Red Hat, Inc.
*
* Authors:
* David Hildenbrand <david@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "virtio-mem-pci.h"
#include "hw/mem/memory-device.h"
#include "qapi/error.h"
#include "qapi/qapi-events-machine.h"
#include "qapi/qapi-events-misc.h"
static void virtio_mem_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
{
VirtIOMEMPCI *mem_pci = VIRTIO_MEM_PCI(vpci_dev);
DeviceState *vdev = DEVICE(&mem_pci->vdev);
virtio_pci_force_virtio_1(vpci_dev);
qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
}
static void virtio_mem_pci_set_addr(MemoryDeviceState *md, uint64_t addr,
Error **errp)
{
object_property_set_uint(OBJECT(md), VIRTIO_MEM_ADDR_PROP, addr, errp);
}
static uint64_t virtio_mem_pci_get_addr(const MemoryDeviceState *md)
{
return object_property_get_uint(OBJECT(md), VIRTIO_MEM_ADDR_PROP,
&error_abort);
}
static MemoryRegion *virtio_mem_pci_get_memory_region(MemoryDeviceState *md,
Error **errp)
{
VirtIOMEMPCI *pci_mem = VIRTIO_MEM_PCI(md);
VirtIOMEM *vmem = VIRTIO_MEM(&pci_mem->vdev);
VirtIOMEMClass *vmc = VIRTIO_MEM_GET_CLASS(vmem);
return vmc->get_memory_region(vmem, errp);
}
static uint64_t virtio_mem_pci_get_plugged_size(const MemoryDeviceState *md,
Error **errp)
{
return object_property_get_uint(OBJECT(md), VIRTIO_MEM_SIZE_PROP,
errp);
}
static void virtio_mem_pci_fill_device_info(const MemoryDeviceState *md,
MemoryDeviceInfo *info)
{
VirtioMEMDeviceInfo *vi = g_new0(VirtioMEMDeviceInfo, 1);
VirtIOMEMPCI *pci_mem = VIRTIO_MEM_PCI(md);
VirtIOMEM *vmem = VIRTIO_MEM(&pci_mem->vdev);
VirtIOMEMClass *vpc = VIRTIO_MEM_GET_CLASS(vmem);
DeviceState *dev = DEVICE(md);
if (dev->id) {
vi->id = g_strdup(dev->id);
}
/* let the real device handle everything else */
vpc->fill_device_info(vmem, vi);
info->u.virtio_mem.data = vi;
info->type = MEMORY_DEVICE_INFO_KIND_VIRTIO_MEM;
}
static uint64_t virtio_mem_pci_get_min_alignment(const MemoryDeviceState *md)
{
return object_property_get_uint(OBJECT(md), VIRTIO_MEM_BLOCK_SIZE_PROP,
&error_abort);
}
static void virtio_mem_pci_size_change_notify(Notifier *notifier, void *data)
{
VirtIOMEMPCI *pci_mem = container_of(notifier, VirtIOMEMPCI,
size_change_notifier);
DeviceState *dev = DEVICE(pci_mem);
char *qom_path = object_get_canonical_path(OBJECT(dev));
const uint64_t * const size_p = data;
qapi_event_send_memory_device_size_change(dev->id, *size_p, qom_path);
g_free(qom_path);
}
static void virtio_mem_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);
MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(klass);
k->realize = virtio_mem_pci_realize;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
pcidev_k->class_id = PCI_CLASS_OTHERS;
mdc->get_addr = virtio_mem_pci_get_addr;
mdc->set_addr = virtio_mem_pci_set_addr;
mdc->get_plugged_size = virtio_mem_pci_get_plugged_size;
mdc->get_memory_region = virtio_mem_pci_get_memory_region;
mdc->fill_device_info = virtio_mem_pci_fill_device_info;
mdc->get_min_alignment = virtio_mem_pci_get_min_alignment;
}
static void virtio_mem_pci_instance_init(Object *obj)
{
VirtIOMEMPCI *dev = VIRTIO_MEM_PCI(obj);
VirtIOMEMClass *vmc;
VirtIOMEM *vmem;
virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
TYPE_VIRTIO_MEM);
dev->size_change_notifier.notify = virtio_mem_pci_size_change_notify;
vmem = VIRTIO_MEM(&dev->vdev);
vmc = VIRTIO_MEM_GET_CLASS(vmem);
/*
* We never remove the notifier again, as we expect both devices to
* disappear at the same time.
*/
vmc->add_size_change_notifier(vmem, &dev->size_change_notifier);
object_property_add_alias(obj, VIRTIO_MEM_BLOCK_SIZE_PROP,
OBJECT(&dev->vdev), VIRTIO_MEM_BLOCK_SIZE_PROP);
object_property_add_alias(obj, VIRTIO_MEM_SIZE_PROP, OBJECT(&dev->vdev),
VIRTIO_MEM_SIZE_PROP);
object_property_add_alias(obj, VIRTIO_MEM_REQUESTED_SIZE_PROP,
OBJECT(&dev->vdev),
VIRTIO_MEM_REQUESTED_SIZE_PROP);
}
static const VirtioPCIDeviceTypeInfo virtio_mem_pci_info = {
.base_name = TYPE_VIRTIO_MEM_PCI,
.generic_name = "virtio-mem-pci",
.instance_size = sizeof(VirtIOMEMPCI),
.instance_init = virtio_mem_pci_instance_init,
.class_init = virtio_mem_pci_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_MEMORY_DEVICE },
{ }
},
};
static void virtio_mem_pci_register_types(void)
{
virtio_pci_types_register(&virtio_mem_pci_info);
}
type_init(virtio_mem_pci_register_types)
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