hw/virtio/virtio-scsi-pci.c

   1 /*
   2  * Virtio scsi 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 or
  12  * (at your option) any later version.  See the COPYING file in the
  13  * top-level directory.
  14  */
  15
  16 #include "qemu/osdep.h"
  17
  18 #include "hw/virtio/virtio-scsi.h"
  19 #include "virtio-pci.h"
  20
  21 typedef struct VirtIOSCSIPCI VirtIOSCSIPCI;
  22
  23 /*
  24  * virtio-scsi-pci: This extends VirtioPCIProxy.
  25  */
  26 #define TYPE_VIRTIO_SCSI_PCI "virtio-scsi-pci-base"
  27 #define VIRTIO_SCSI_PCI(obj) \
  28         OBJECT_CHECK(VirtIOSCSIPCI, (obj), TYPE_VIRTIO_SCSI_PCI)
  29
  30 struct VirtIOSCSIPCI {
  31     VirtIOPCIProxy parent_obj;
  32     VirtIOSCSI vdev;
  33 };
  34
  35 static Property virtio_scsi_pci_properties[] = {
  36     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
  37                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
  38     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  39                        DEV_NVECTORS_UNSPECIFIED),
  40     DEFINE_PROP_END_OF_LIST(),
  41 };
  42
  43 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  44 {
  45     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
  46     DeviceState *vdev = DEVICE(&dev->vdev);
  47     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
  48     DeviceState *proxy = DEVICE(vpci_dev);
  49     char *bus_name;
  50
  51     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  52         vpci_dev->nvectors = vs->conf.num_queues + 3;
  53     }
  54
  55     /*
  56      * For command line compatibility, this sets the virtio-scsi-device bus
  57      * name as before.
  58      */
  59     if (proxy->id) {
  60         bus_name = g_strdup_printf("%s.0", proxy->id);
  61         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
  62         g_free(bus_name);
  63     }
  64
  65     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
  66     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
  67 }
  68
  69 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
  70 {
  71     DeviceClass *dc = DEVICE_CLASS(klass);
  72     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  73     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  74
  75     k->realize = virtio_scsi_pci_realize;
  76     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  77     dc->props = virtio_scsi_pci_properties;
  78     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  79     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
  80     pcidev_k->revision = 0x00;
  81     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  82 }
  83
  84 static void virtio_scsi_pci_instance_init(Object *obj)
  85 {
  86     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
  87
  88     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  89                                 TYPE_VIRTIO_SCSI);
  90 }
  91
  92 static const VirtioPCIDeviceTypeInfo virtio_scsi_pci_info = {
  93     .base_name              = TYPE_VIRTIO_SCSI_PCI,
  94     .generic_name           = "virtio-scsi-pci",
  95     .transitional_name      = "virtio-scsi-pci-transitional",
  96     .non_transitional_name  = "virtio-scsi-pci-non-transitional",
  97     .instance_size = sizeof(VirtIOSCSIPCI),
  98     .instance_init = virtio_scsi_pci_instance_init,
  99     .class_init    = virtio_scsi_pci_class_init,
 100 };
 101
 102 static void virtio_scsi_pci_register(void)
 103 {
 104     virtio_pci_types_register(&virtio_scsi_pci_info);
 105 }
 106
 107 type_init(virtio_scsi_pci_register)