Merge tag 'pull-testing-gdbstub-plugins-gitdm-061022-3' of https://github.com/stsquad...
[qemu.git] / hw / virtio / virtio-mem-pci.c
1 /*
2 * Virtio MEM PCI device
3 *
4 * Copyright (C) 2020 Red Hat, Inc.
5 *
6 * Authors:
7 * David Hildenbrand <david@redhat.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2.
10 * See the COPYING file in the top-level directory.
11 */
12
13 #include "qemu/osdep.h"
14 #include "virtio-mem-pci.h"
15 #include "hw/mem/memory-device.h"
16 #include "qapi/error.h"
17 #include "qapi/qapi-events-machine.h"
18 #include "qapi/qapi-events-misc.h"
19
20 static void virtio_mem_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
21 {
22 VirtIOMEMPCI *mem_pci = VIRTIO_MEM_PCI(vpci_dev);
23 DeviceState *vdev = DEVICE(&mem_pci->vdev);
24
25 virtio_pci_force_virtio_1(vpci_dev);
26 qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
27 }
28
29 static void virtio_mem_pci_set_addr(MemoryDeviceState *md, uint64_t addr,
30 Error **errp)
31 {
32 object_property_set_uint(OBJECT(md), VIRTIO_MEM_ADDR_PROP, addr, errp);
33 }
34
35 static uint64_t virtio_mem_pci_get_addr(const MemoryDeviceState *md)
36 {
37 return object_property_get_uint(OBJECT(md), VIRTIO_MEM_ADDR_PROP,
38 &error_abort);
39 }
40
41 static MemoryRegion *virtio_mem_pci_get_memory_region(MemoryDeviceState *md,
42 Error **errp)
43 {
44 VirtIOMEMPCI *pci_mem = VIRTIO_MEM_PCI(md);
45 VirtIOMEM *vmem = VIRTIO_MEM(&pci_mem->vdev);
46 VirtIOMEMClass *vmc = VIRTIO_MEM_GET_CLASS(vmem);
47
48 return vmc->get_memory_region(vmem, errp);
49 }
50
51 static uint64_t virtio_mem_pci_get_plugged_size(const MemoryDeviceState *md,
52 Error **errp)
53 {
54 return object_property_get_uint(OBJECT(md), VIRTIO_MEM_SIZE_PROP,
55 errp);
56 }
57
58 static void virtio_mem_pci_fill_device_info(const MemoryDeviceState *md,
59 MemoryDeviceInfo *info)
60 {
61 VirtioMEMDeviceInfo *vi = g_new0(VirtioMEMDeviceInfo, 1);
62 VirtIOMEMPCI *pci_mem = VIRTIO_MEM_PCI(md);
63 VirtIOMEM *vmem = VIRTIO_MEM(&pci_mem->vdev);
64 VirtIOMEMClass *vpc = VIRTIO_MEM_GET_CLASS(vmem);
65 DeviceState *dev = DEVICE(md);
66
67 if (dev->id) {
68 vi->has_id = true;
69 vi->id = g_strdup(dev->id);
70 }
71
72 /* let the real device handle everything else */
73 vpc->fill_device_info(vmem, vi);
74
75 info->u.virtio_mem.data = vi;
76 info->type = MEMORY_DEVICE_INFO_KIND_VIRTIO_MEM;
77 }
78
79 static uint64_t virtio_mem_pci_get_min_alignment(const MemoryDeviceState *md)
80 {
81 return object_property_get_uint(OBJECT(md), VIRTIO_MEM_BLOCK_SIZE_PROP,
82 &error_abort);
83 }
84
85 static void virtio_mem_pci_size_change_notify(Notifier *notifier, void *data)
86 {
87 VirtIOMEMPCI *pci_mem = container_of(notifier, VirtIOMEMPCI,
88 size_change_notifier);
89 DeviceState *dev = DEVICE(pci_mem);
90 char *qom_path = object_get_canonical_path(OBJECT(dev));
91 const uint64_t * const size_p = data;
92
93 qapi_event_send_memory_device_size_change(!!dev->id, dev->id, *size_p,
94 qom_path);
95 g_free(qom_path);
96 }
97
98 static void virtio_mem_pci_class_init(ObjectClass *klass, void *data)
99 {
100 DeviceClass *dc = DEVICE_CLASS(klass);
101 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
102 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
103 MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(klass);
104
105 k->realize = virtio_mem_pci_realize;
106 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
107 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
108 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_MEM;
109 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
110 pcidev_k->class_id = PCI_CLASS_OTHERS;
111
112 mdc->get_addr = virtio_mem_pci_get_addr;
113 mdc->set_addr = virtio_mem_pci_set_addr;
114 mdc->get_plugged_size = virtio_mem_pci_get_plugged_size;
115 mdc->get_memory_region = virtio_mem_pci_get_memory_region;
116 mdc->fill_device_info = virtio_mem_pci_fill_device_info;
117 mdc->get_min_alignment = virtio_mem_pci_get_min_alignment;
118 }
119
120 static void virtio_mem_pci_instance_init(Object *obj)
121 {
122 VirtIOMEMPCI *dev = VIRTIO_MEM_PCI(obj);
123 VirtIOMEMClass *vmc;
124 VirtIOMEM *vmem;
125
126 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
127 TYPE_VIRTIO_MEM);
128
129 dev->size_change_notifier.notify = virtio_mem_pci_size_change_notify;
130 vmem = VIRTIO_MEM(&dev->vdev);
131 vmc = VIRTIO_MEM_GET_CLASS(vmem);
132 /*
133 * We never remove the notifier again, as we expect both devices to
134 * disappear at the same time.
135 */
136 vmc->add_size_change_notifier(vmem, &dev->size_change_notifier);
137
138 object_property_add_alias(obj, VIRTIO_MEM_BLOCK_SIZE_PROP,
139 OBJECT(&dev->vdev), VIRTIO_MEM_BLOCK_SIZE_PROP);
140 object_property_add_alias(obj, VIRTIO_MEM_SIZE_PROP, OBJECT(&dev->vdev),
141 VIRTIO_MEM_SIZE_PROP);
142 object_property_add_alias(obj, VIRTIO_MEM_REQUESTED_SIZE_PROP,
143 OBJECT(&dev->vdev),
144 VIRTIO_MEM_REQUESTED_SIZE_PROP);
145 }
146
147 static const VirtioPCIDeviceTypeInfo virtio_mem_pci_info = {
148 .base_name = TYPE_VIRTIO_MEM_PCI,
149 .generic_name = "virtio-mem-pci",
150 .instance_size = sizeof(VirtIOMEMPCI),
151 .instance_init = virtio_mem_pci_instance_init,
152 .class_init = virtio_mem_pci_class_init,
153 .interfaces = (InterfaceInfo[]) {
154 { TYPE_MEMORY_DEVICE },
155 { }
156 },
157 };
158
159 static void virtio_mem_pci_register_types(void)
160 {
161 virtio_pci_types_register(&virtio_mem_pci_info);
162 }
163 type_init(virtio_mem_pci_register_types)