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