1/*
2 * Virtio PMEM PCI device
3 *
4 * Copyright (C) 2018-2019 Red Hat, Inc.
5 *
6 * Authors:
7 * Pankaj Gupta <pagupta@redhat.com>
8 * David Hildenbrand <david@redhat.com>
9 *
10 * This work is licensed under the terms of the GNU GPL, version 2.
11 * See the COPYING file in the top-level directory.
12 */
13
14#include "qemu/osdep.h"
15
16#include "virtio-pmem-pci.h"
17#include "hw/mem/memory-device.h"
18#include "qapi/error.h"
19
20static void virtio_pmem_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
21{
22 VirtIOPMEMPCI *pmem_pci = VIRTIO_PMEM_PCI(vpci_dev);
23 DeviceState *vdev = DEVICE(&pmem_pci->vdev);
24
25 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
26 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
27}
28
29static void virtio_pmem_pci_set_addr(MemoryDeviceState *md, uint64_t addr,
30 Error **errp)
31{
32 object_property_set_uint(OBJECT(md), addr, VIRTIO_PMEM_ADDR_PROP, errp);
33}
34
35static uint64_t virtio_pmem_pci_get_addr(const MemoryDeviceState *md)
36{
37 return object_property_get_uint(OBJECT(md), VIRTIO_PMEM_ADDR_PROP,
38 &error_abort);
39}
40
41static MemoryRegion *virtio_pmem_pci_get_memory_region(MemoryDeviceState *md,
42 Error **errp)
43{
44 VirtIOPMEMPCI *pci_pmem = VIRTIO_PMEM_PCI(md);
45 VirtIOPMEM *pmem = VIRTIO_PMEM(&pci_pmem->vdev);
46 VirtIOPMEMClass *vpc = VIRTIO_PMEM_GET_CLASS(pmem);
47
48 return vpc->get_memory_region(pmem, errp);
49}
50
51static uint64_t virtio_pmem_pci_get_plugged_size(const MemoryDeviceState *md,
52 Error **errp)
53{
54 VirtIOPMEMPCI *pci_pmem = VIRTIO_PMEM_PCI(md);
55 VirtIOPMEM *pmem = VIRTIO_PMEM(&pci_pmem->vdev);
56 VirtIOPMEMClass *vpc = VIRTIO_PMEM_GET_CLASS(pmem);
57 MemoryRegion *mr = vpc->get_memory_region(pmem, errp);
58
59 /* the plugged size corresponds to the region size */
60 return mr ? memory_region_size(mr) : 0;
61}
62
63static void virtio_pmem_pci_fill_device_info(const MemoryDeviceState *md,
64 MemoryDeviceInfo *info)
65{
66 VirtioPMEMDeviceInfo *vi = g_new0(VirtioPMEMDeviceInfo, 1);
67 VirtIOPMEMPCI *pci_pmem = VIRTIO_PMEM_PCI(md);
68 VirtIOPMEM *pmem = VIRTIO_PMEM(&pci_pmem->vdev);
69 VirtIOPMEMClass *vpc = VIRTIO_PMEM_GET_CLASS(pmem);
70 DeviceState *dev = DEVICE(md);
71
72 if (dev->id) {
73 vi->has_id = true;
74 vi->id = g_strdup(dev->id);
75 }
76
77 /* let the real device handle everything else */
78 vpc->fill_device_info(pmem, vi);
79
80 info->u.virtio_pmem.data = vi;
81 info->type = MEMORY_DEVICE_INFO_KIND_VIRTIO_PMEM;
82}
83
84static void virtio_pmem_pci_class_init(ObjectClass *klass, void *data)
85{
86 DeviceClass *dc = DEVICE_CLASS(klass);
87 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
88 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
89 MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(klass);
90
91 k->realize = virtio_pmem_pci_realize;
92 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
93 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
94 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_PMEM;
95 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
96 pcidev_k->class_id = PCI_CLASS_OTHERS;
97
98 mdc->get_addr = virtio_pmem_pci_get_addr;
99 mdc->set_addr = virtio_pmem_pci_set_addr;
100 mdc->get_plugged_size = virtio_pmem_pci_get_plugged_size;
101 mdc->get_memory_region = virtio_pmem_pci_get_memory_region;
102 mdc->fill_device_info = virtio_pmem_pci_fill_device_info;
103}
104
105static void virtio_pmem_pci_instance_init(Object *obj)
106{
107 VirtIOPMEMPCI *dev = VIRTIO_PMEM_PCI(obj);
108
109 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
110 TYPE_VIRTIO_PMEM);
111}
112
113static const VirtioPCIDeviceTypeInfo virtio_pmem_pci_info = {
114 .base_name = TYPE_VIRTIO_PMEM_PCI,
115 .generic_name = "virtio-pmem-pci",
116 .instance_size = sizeof(VirtIOPMEMPCI),
117 .instance_init = virtio_pmem_pci_instance_init,
118 .class_init = virtio_pmem_pci_class_init,
119 .interfaces = (InterfaceInfo[]) {
120 { TYPE_MEMORY_DEVICE },
121 { }
122 },
123};
124
125static void virtio_pmem_pci_register_types(void)
126{
127 virtio_pci_types_register(&virtio_pmem_pci_info);
128}
129type_init(virtio_pmem_pci_register_types)
130