xref: /openbmc/qemu/hw/virtio/vhost-user-fs-pci.c (revision e1b1f534)
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 "hw/virtio/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 
vhost_user_fs_pci_realize(VirtIOPCIProxy * vpci_dev,Error ** errp)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 
vhost_user_fs_pci_class_init(ObjectClass * klass,void * data)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 
vhost_user_fs_pci_instance_init(Object * obj)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     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
72                               "bootindex");
73 }
74 
75 static const VirtioPCIDeviceTypeInfo vhost_user_fs_pci_info = {
76     .base_name             = TYPE_VHOST_USER_FS_PCI,
77     .non_transitional_name = "vhost-user-fs-pci",
78     .instance_size = sizeof(VHostUserFSPCI),
79     .instance_init = vhost_user_fs_pci_instance_init,
80     .class_init    = vhost_user_fs_pci_class_init,
81 };
82 
vhost_user_fs_pci_register(void)83 static void vhost_user_fs_pci_register(void)
84 {
85     virtio_pci_types_register(&vhost_user_fs_pci_info);
86 }
87 
88 type_init(vhost_user_fs_pci_register);
89