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

   1 /*
   2  * Vhost-user filesystem virtio device PCI glue
   3  *
   4  * Copyright 2018-2019 Red Hat, Inc.
   5  *
   6  * Authors:
   7  *  Dr. David Alan Gilbert <dgilbert@redhat.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or
  10  * (at your option) any later version.  See the COPYING file in the
  11  * top-level directory.
  12  */
  13
  14 #include "qemu/osdep.h"
  15 #include "hw/qdev-properties.h"
  16 #include "hw/virtio/vhost-user-fs.h"
  17 #include "virtio-pci.h"
  18
  19 struct VHostUserFSPCI {
  20     VirtIOPCIProxy parent_obj;
  21     VHostUserFS vdev;
  22 };
  23
  24 typedef struct VHostUserFSPCI VHostUserFSPCI;
  25
  26 #define TYPE_VHOST_USER_FS_PCI "vhost-user-fs-pci-base"
  27
  28 #define VHOST_USER_FS_PCI(obj) \
  29         OBJECT_CHECK(VHostUserFSPCI, (obj), TYPE_VHOST_USER_FS_PCI)
  30
  31 static Property vhost_user_fs_pci_properties[] = {
  32     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  33                        DEV_NVECTORS_UNSPECIFIED),
  34     DEFINE_PROP_END_OF_LIST(),
  35 };
  36
  37 static void vhost_user_fs_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  38 {
  39     VHostUserFSPCI *dev = VHOST_USER_FS_PCI(vpci_dev);
  40     DeviceState *vdev = DEVICE(&dev->vdev);
  41
  42     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  43         /* Also reserve config change and hiprio queue vectors */
  44         vpci_dev->nvectors = dev->vdev.conf.num_request_queues + 2;
  45     }
  46
  47     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  48 }
  49
  50 static void vhost_user_fs_pci_class_init(ObjectClass *klass, void *data)
  51 {
  52     DeviceClass *dc = DEVICE_CLASS(klass);
  53     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  54     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  55     k->realize = vhost_user_fs_pci_realize;
  56     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  57     device_class_set_props(dc, vhost_user_fs_pci_properties);
  58     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  59     pcidev_k->device_id = 0; /* Set by virtio-pci based on virtio id */
  60     pcidev_k->revision = 0x00;
  61     pcidev_k->class_id = PCI_CLASS_STORAGE_OTHER;
  62 }
  63
  64 static void vhost_user_fs_pci_instance_init(Object *obj)
  65 {
  66     VHostUserFSPCI *dev = VHOST_USER_FS_PCI(obj);
  67
  68     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  69                                 TYPE_VHOST_USER_FS);
  70 }
  71
  72 static const VirtioPCIDeviceTypeInfo vhost_user_fs_pci_info = {
  73     .base_name             = TYPE_VHOST_USER_FS_PCI,
  74     .non_transitional_name = "vhost-user-fs-pci",
  75     .instance_size = sizeof(VHostUserFSPCI),
  76     .instance_init = vhost_user_fs_pci_instance_init,
  77     .class_init    = vhost_user_fs_pci_class_init,
  78 };
  79
  80 static void vhost_user_fs_pci_register(void)
  81 {
  82     virtio_pci_types_register(&vhost_user_fs_pci_info);
  83 }
  84
  85 type_init(vhost_user_fs_pci_register);