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
  20 static 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
  29 static 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
  35 static 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
  41 static 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
  51 static 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
  63 static 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
  84 static 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
 105 static 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
 113 static 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
 125 static void virtio_pmem_pci_register_types(void)
 126 {
 127     virtio_pci_types_register(&virtio_pmem_pci_info);
 128 }
 129 type_init(virtio_pmem_pci_register_types)