LXR qemu/hw/virtio/virtio-pmem-pci.c

   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