hw/virtio/vhost-scsi-pci.c

   1 /*
   2  * Vhost scsi PCI bindings
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Stefan Hajnoczi   <stefanha@linux.vnet.ibm.com>
   8  *
   9  * Changes for QEMU mainline + tcm_vhost kernel upstream:
  10  *  Nicholas Bellinger <nab@risingtidesystems.com>
  11  *
  12  * This work is licensed under the terms of the GNU LGPL, version 2 or later.
  13  * See the COPYING.LIB file in the top-level directory.
  14  *
  15  */
  16
  17 #include "qemu/osdep.h"
  18
  19 #include "standard-headers/linux/virtio_pci.h"
  20 #include "hw/qdev-properties.h"
  21 #include "hw/virtio/vhost-scsi.h"
  22 #include "qapi/error.h"
  23 #include "qemu/module.h"
  24 #include "virtio-pci.h"
  25
  26 typedef struct VHostSCSIPCI VHostSCSIPCI;
  27
  28 /*
  29  * vhost-scsi-pci: This extends VirtioPCIProxy.
  30  */
  31 #define TYPE_VHOST_SCSI_PCI "vhost-scsi-pci-base"
  32 #define VHOST_SCSI_PCI(obj) \
  33         OBJECT_CHECK(VHostSCSIPCI, (obj), TYPE_VHOST_SCSI_PCI)
  34
  35 struct VHostSCSIPCI {
  36     VirtIOPCIProxy parent_obj;
  37     VHostSCSI vdev;
  38 };
  39
  40 static Property vhost_scsi_pci_properties[] = {
  41     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  42                        DEV_NVECTORS_UNSPECIFIED),
  43     DEFINE_PROP_END_OF_LIST(),
  44 };
  45
  46 static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  47 {
  48     VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
  49     DeviceState *vdev = DEVICE(&dev->vdev);
  50     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
  51
  52     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  53         vpci_dev->nvectors = vs->conf.num_queues + 3;
  54     }
  55
  56     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
  57     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
  58 }
  59
  60 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
  61 {
  62     DeviceClass *dc = DEVICE_CLASS(klass);
  63     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  64     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  65     k->realize = vhost_scsi_pci_realize;
  66     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  67     dc->props = vhost_scsi_pci_properties;
  68     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  69     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
  70     pcidev_k->revision = 0x00;
  71     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  72 }
  73
  74 static void vhost_scsi_pci_instance_init(Object *obj)
  75 {
  76     VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
  77
  78     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  79                                 TYPE_VHOST_SCSI);
  80     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  81                               "bootindex", &error_abort);
  82 }
  83
  84 static const VirtioPCIDeviceTypeInfo vhost_scsi_pci_info = {
  85     .base_name             = TYPE_VHOST_SCSI_PCI,
  86     .generic_name          = "vhost-scsi-pci",
  87     .transitional_name     = "vhost-scsi-pci-transitional",
  88     .non_transitional_name = "vhost-scsi-pci-non-transitional",
  89     .instance_size = sizeof(VHostSCSIPCI),
  90     .instance_init = vhost_scsi_pci_instance_init,
  91     .class_init    = vhost_scsi_pci_class_init,
  92 };
  93
  94 static void vhost_scsi_pci_register(void)
  95 {
  96     virtio_pci_types_register(&vhost_scsi_pci_info);
  97 }
  98
  99 type_init(vhost_scsi_pci_register)