hw/virtio/vhost-user-scsi-pci.c

   1 /*
   2  * Vhost user scsi PCI Bindings
   3  *
   4  * Copyright (c) 2016 Nutanix Inc. All rights reserved.
   5  *
   6  * Author:
   7  *  Felipe Franciosi <felipe@nutanix.com>
   8  *
   9  * This work is largely based on the "vhost-scsi" implementation by:
  10  *  Stefan Hajnoczi    <stefanha@linux.vnet.ibm.com>
  11  *  Nicholas Bellinger <nab@risingtidesystems.com>
  12  *
  13  * This work is licensed under the terms of the GNU LGPL, version 2 or later.
  14  * See the COPYING.LIB file in the top-level directory.
  15  *
  16  */
  17
  18 #include "qemu/osdep.h"
  19
  20 #include "standard-headers/linux/virtio_pci.h"
  21 #include "hw/virtio/vhost-user-scsi.h"
  22 #include "hw/virtio/virtio.h"
  23 #include "hw/virtio/virtio-scsi.h"
  24 #include "hw/pci/pci.h"
  25 #include "qapi/error.h"
  26 #include "qemu/error-report.h"
  27 #include "hw/pci/msi.h"
  28 #include "hw/pci/msix.h"
  29 #include "hw/loader.h"
  30 #include "sysemu/kvm.h"
  31 #include "virtio-pci.h"
  32
  33 typedef struct VHostUserSCSIPCI VHostUserSCSIPCI;
  34
  35 #define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci-base"
  36 #define VHOST_USER_SCSI_PCI(obj) \
  37         OBJECT_CHECK(VHostUserSCSIPCI, (obj), TYPE_VHOST_USER_SCSI_PCI)
  38
  39 struct VHostUserSCSIPCI {
  40     VirtIOPCIProxy parent_obj;
  41     VHostUserSCSI vdev;
  42 };
  43
  44 static Property vhost_user_scsi_pci_properties[] = {
  45     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  46                        DEV_NVECTORS_UNSPECIFIED),
  47     DEFINE_PROP_END_OF_LIST(),
  48 };
  49
  50 static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  51 {
  52     VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev);
  53     DeviceState *vdev = DEVICE(&dev->vdev);
  54     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
  55
  56     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  57         vpci_dev->nvectors = vs->conf.num_queues + 3;
  58     }
  59
  60     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
  61     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
  62 }
  63
  64 static void vhost_user_scsi_pci_class_init(ObjectClass *klass, void *data)
  65 {
  66     DeviceClass *dc = DEVICE_CLASS(klass);
  67     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  68     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  69     k->realize = vhost_user_scsi_pci_realize;
  70     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  71     dc->props = vhost_user_scsi_pci_properties;
  72     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  73     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
  74     pcidev_k->revision = 0x00;
  75     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  76 }
  77
  78 static void vhost_user_scsi_pci_instance_init(Object *obj)
  79 {
  80     VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj);
  81
  82     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  83                                 TYPE_VHOST_USER_SCSI);
  84     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  85                               "bootindex", &error_abort);
  86 }
  87
  88 static const VirtioPCIDeviceTypeInfo vhost_user_scsi_pci_info = {
  89     .base_name             = TYPE_VHOST_USER_SCSI_PCI,
  90     .generic_name          = "vhost-user-scsi-pci",
  91     .transitional_name     = "vhost-user-scsi-pci-transitional",
  92     .non_transitional_name = "vhost-user-scsi-pci-non-transitional",
  93     .instance_size = sizeof(VHostUserSCSIPCI),
  94     .instance_init = vhost_user_scsi_pci_instance_init,
  95     .class_init    = vhost_user_scsi_pci_class_init,
  96 };
  97
  98 static void vhost_user_scsi_pci_register(void)
  99 {
 100     virtio_pci_types_register(&vhost_user_scsi_pci_info);
 101 }
 102
 103 type_init(vhost_user_scsi_pci_register)