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 18 static void virtio_mem_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 19 { 20 VirtIOMEMPCI *mem_pci = VIRTIO_MEM_PCI(vpci_dev); 21 DeviceState *vdev = DEVICE(&mem_pci->vdev); 22 23 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 24 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 25 } 26 27 static void virtio_mem_pci_set_addr(MemoryDeviceState *md, uint64_t addr, 28 Error **errp) 29 { 30 object_property_set_uint(OBJECT(md), addr, VIRTIO_MEM_ADDR_PROP, errp); 31 } 32 33 static uint64_t virtio_mem_pci_get_addr(const MemoryDeviceState *md) 34 { 35 return object_property_get_uint(OBJECT(md), VIRTIO_MEM_ADDR_PROP, 36 &error_abort); 37 } 38 39 static MemoryRegion *virtio_mem_pci_get_memory_region(MemoryDeviceState *md, 40 Error **errp) 41 { 42 VirtIOMEMPCI *pci_mem = VIRTIO_MEM_PCI(md); 43 VirtIOMEM *vmem = VIRTIO_MEM(&pci_mem->vdev); 44 VirtIOMEMClass *vmc = VIRTIO_MEM_GET_CLASS(vmem); 45 46 return vmc->get_memory_region(vmem, errp); 47 } 48 49 static uint64_t virtio_mem_pci_get_plugged_size(const MemoryDeviceState *md, 50 Error **errp) 51 { 52 return object_property_get_uint(OBJECT(md), VIRTIO_MEM_SIZE_PROP, 53 errp); 54 } 55 56 static void virtio_mem_pci_fill_device_info(const MemoryDeviceState *md, 57 MemoryDeviceInfo *info) 58 { 59 VirtioMEMDeviceInfo *vi = g_new0(VirtioMEMDeviceInfo, 1); 60 VirtIOMEMPCI *pci_mem = VIRTIO_MEM_PCI(md); 61 VirtIOMEM *vmem = VIRTIO_MEM(&pci_mem->vdev); 62 VirtIOMEMClass *vpc = VIRTIO_MEM_GET_CLASS(vmem); 63 DeviceState *dev = DEVICE(md); 64 65 if (dev->id) { 66 vi->has_id = true; 67 vi->id = g_strdup(dev->id); 68 } 69 70 /* let the real device handle everything else */ 71 vpc->fill_device_info(vmem, vi); 72 73 info->u.virtio_mem.data = vi; 74 info->type = MEMORY_DEVICE_INFO_KIND_VIRTIO_MEM; 75 } 76 77 static void virtio_mem_pci_class_init(ObjectClass *klass, void *data) 78 { 79 DeviceClass *dc = DEVICE_CLASS(klass); 80 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 81 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 82 MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(klass); 83 84 k->realize = virtio_mem_pci_realize; 85 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 86 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 87 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_MEM; 88 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 89 pcidev_k->class_id = PCI_CLASS_OTHERS; 90 91 mdc->get_addr = virtio_mem_pci_get_addr; 92 mdc->set_addr = virtio_mem_pci_set_addr; 93 mdc->get_plugged_size = virtio_mem_pci_get_plugged_size; 94 mdc->get_memory_region = virtio_mem_pci_get_memory_region; 95 mdc->fill_device_info = virtio_mem_pci_fill_device_info; 96 } 97 98 static void virtio_mem_pci_instance_init(Object *obj) 99 { 100 VirtIOMEMPCI *dev = VIRTIO_MEM_PCI(obj); 101 102 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 103 TYPE_VIRTIO_MEM); 104 object_property_add_alias(obj, VIRTIO_MEM_BLOCK_SIZE_PROP, 105 OBJECT(&dev->vdev), VIRTIO_MEM_BLOCK_SIZE_PROP); 106 object_property_add_alias(obj, VIRTIO_MEM_SIZE_PROP, OBJECT(&dev->vdev), 107 VIRTIO_MEM_SIZE_PROP); 108 object_property_add_alias(obj, VIRTIO_MEM_REQUESTED_SIZE_PROP, 109 OBJECT(&dev->vdev), 110 VIRTIO_MEM_REQUESTED_SIZE_PROP); 111 } 112 113 static const VirtioPCIDeviceTypeInfo virtio_mem_pci_info = { 114 .base_name = TYPE_VIRTIO_MEM_PCI, 115 .generic_name = "virtio-mem-pci", 116 .instance_size = sizeof(VirtIOMEMPCI), 117 .instance_init = virtio_mem_pci_instance_init, 118 .class_init = virtio_mem_pci_class_init, 119 .interfaces = (InterfaceInfo[]) { 120 { TYPE_MEMORY_DEVICE }, 121 { } 122 }, 123 }; 124 125 static void virtio_mem_pci_register_types(void) 126 { 127 virtio_pci_types_register(&virtio_mem_pci_info); 128 } 129 type_init(virtio_mem_pci_register_types) 130