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 #include "qom/object.h"
  19
  20 struct VHostUserFSPCI {
  21     VirtIOPCIProxy parent_obj;
  22     VHostUserFS vdev;
  23 };
  24
  25 typedef struct VHostUserFSPCI VHostUserFSPCI;
  26
  27 #define TYPE_VHOST_USER_FS_PCI "vhost-user-fs-pci-base"
  28
  29 DECLARE_INSTANCE_CHECKER(VHostUserFSPCI, VHOST_USER_FS_PCI,
  30                          TYPE_VHOST_USER_FS_PCI)
  31
  32 static Property vhost_user_fs_pci_properties[] = {
  33     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  34                        DEV_NVECTORS_UNSPECIFIED),
  35     DEFINE_PROP_END_OF_LIST(),
  36 };
  37
  38 static void vhost_user_fs_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  39 {
  40     VHostUserFSPCI *dev = VHOST_USER_FS_PCI(vpci_dev);
  41     DeviceState *vdev = DEVICE(&dev->vdev);
  42
  43     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  44         /* Also reserve config change and hiprio queue vectors */
  45         vpci_dev->nvectors = dev->vdev.conf.num_request_queues + 2;
  46     }
  47
  48     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  49 }
  50
  51 static void vhost_user_fs_pci_class_init(ObjectClass *klass, void *data)
  52 {
  53     DeviceClass *dc = DEVICE_CLASS(klass);
  54     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  55     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  56     k->realize = vhost_user_fs_pci_realize;
  57     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  58     device_class_set_props(dc, vhost_user_fs_pci_properties);
  59     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  60     pcidev_k->device_id = 0; /* Set by virtio-pci based on virtio id */
  61     pcidev_k->revision = 0x00;
  62     pcidev_k->class_id = PCI_CLASS_STORAGE_OTHER;
  63 }
  64
  65 static void vhost_user_fs_pci_instance_init(Object *obj)
  66 {
  67     VHostUserFSPCI *dev = VHOST_USER_FS_PCI(obj);
  68
  69     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  70                                 TYPE_VHOST_USER_FS);
  71 }
  72
  73 static const VirtioPCIDeviceTypeInfo vhost_user_fs_pci_info = {
  74     .base_name             = TYPE_VHOST_USER_FS_PCI,
  75     .non_transitional_name = "vhost-user-fs-pci",
  76     .instance_size = sizeof(VHostUserFSPCI),
  77     .instance_init = vhost_user_fs_pci_instance_init,
  78     .class_init    = vhost_user_fs_pci_class_init,
  79 };
  80
  81 static void vhost_user_fs_pci_register(void)
  82 {
  83     virtio_pci_types_register(&vhost_user_fs_pci_info);
  84 }
  85
  86 type_init(vhost_user_fs_pci_register);