hw/virtio/virtio-blk-pci.c

   1 /*
   2  * Virtio blk PCI Bindings
   3  *
   4  * Copyright IBM, Corp. 2007
   5  * Copyright (c) 2009 CodeSourcery
   6  *
   7  * Authors:
   8  *  Anthony Liguori   <aliguori@us.ibm.com>
   9  *  Paul Brook        <paul@codesourcery.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2.  See
  12  * the COPYING file in the top-level directory.
  13  *
  14  * Contributions after 2012-01-13 are licensed under the terms of the
  15  * GNU GPL, version 2 or (at your option) any later version.
  16  */
  17
  18 #include "qemu/osdep.h"
  19
  20 #include "hw/qdev-properties.h"
  21 #include "hw/virtio/virtio-blk.h"
  22 #include "virtio-pci.h"
  23 #include "qapi/error.h"
  24 #include "qemu/module.h"
  25
  26 typedef struct VirtIOBlkPCI VirtIOBlkPCI;
  27
  28 /*
  29  * virtio-blk-pci: This extends VirtioPCIProxy.
  30  */
  31 #define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci-base"
  32 #define VIRTIO_BLK_PCI(obj) \
  33         OBJECT_CHECK(VirtIOBlkPCI, (obj), TYPE_VIRTIO_BLK_PCI)
  34
  35 struct VirtIOBlkPCI {
  36     VirtIOPCIProxy parent_obj;
  37     VirtIOBlock vdev;
  38 };
  39
  40 static Property virtio_blk_pci_properties[] = {
  41     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
  42     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
  43                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
  44     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  45                        DEV_NVECTORS_UNSPECIFIED),
  46     DEFINE_PROP_END_OF_LIST(),
  47 };
  48
  49 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  50 {
  51     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
  52     DeviceState *vdev = DEVICE(&dev->vdev);
  53
  54     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  55         vpci_dev->nvectors = dev->vdev.conf.num_queues + 1;
  56     }
  57
  58     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  59 }
  60
  61 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
  62 {
  63     DeviceClass *dc = DEVICE_CLASS(klass);
  64     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  65     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  66
  67     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  68     device_class_set_props(dc, virtio_blk_pci_properties);
  69     k->realize = virtio_blk_pci_realize;
  70     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  71     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
  72     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  73     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  74 }
  75
  76 static void virtio_blk_pci_instance_init(Object *obj)
  77 {
  78     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
  79
  80     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  81                                 TYPE_VIRTIO_BLK);
  82     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  83                               "bootindex");
  84 }
  85
  86 static const VirtioPCIDeviceTypeInfo virtio_blk_pci_info = {
  87     .base_name              = TYPE_VIRTIO_BLK_PCI,
  88     .generic_name           = "virtio-blk-pci",
  89     .transitional_name      = "virtio-blk-pci-transitional",
  90     .non_transitional_name  = "virtio-blk-pci-non-transitional",
  91     .instance_size = sizeof(VirtIOBlkPCI),
  92     .instance_init = virtio_blk_pci_instance_init,
  93     .class_init    = virtio_blk_pci_class_init,
  94 };
  95
  96 static void virtio_blk_pci_register(void)
  97 {
  98     virtio_pci_types_register(&virtio_blk_pci_info);
  99 }
 100
 101 type_init(virtio_blk_pci_register)