1 /*
2 * Vhost Vdpa Device PCI Bindings
3 *
4 * Copyright (c) Huawei Technologies Co., Ltd. 2022. All Rights Reserved.
5 *
6 * Authors:
7 * Longpeng <longpeng2@huawei.com>
8 *
9 * Largely based on the "vhost-user-blk-pci.c" and "vhost-user-blk.c"
10 * implemented by:
11 * Changpeng Liu <changpeng.liu@intel.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 #include "qemu/osdep.h"
17 #include <sys/ioctl.h>
18 #include <linux/vhost.h>
19 #include "hw/virtio/virtio.h"
20 #include "hw/virtio/vdpa-dev.h"
21 #include "hw/pci/pci.h"
22 #include "hw/qdev-properties.h"
23 #include "qapi/error.h"
24 #include "qemu/error-report.h"
25 #include "qemu/module.h"
26 #include "hw/virtio/virtio-pci.h"
27 #include "qom/object.h"
28
29
30 typedef struct VhostVdpaDevicePCI VhostVdpaDevicePCI;
31
32 #define TYPE_VHOST_VDPA_DEVICE_PCI "vhost-vdpa-device-pci-base"
33 DECLARE_INSTANCE_CHECKER(VhostVdpaDevicePCI, VHOST_VDPA_DEVICE_PCI,
34 TYPE_VHOST_VDPA_DEVICE_PCI)
35
36 struct VhostVdpaDevicePCI {
37 VirtIOPCIProxy parent_obj;
38 VhostVdpaDevice vdev;
39 };
40
vhost_vdpa_device_pci_instance_init(Object * obj)41 static void vhost_vdpa_device_pci_instance_init(Object *obj)
42 {
43 VhostVdpaDevicePCI *dev = VHOST_VDPA_DEVICE_PCI(obj);
44
45 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
46 TYPE_VHOST_VDPA_DEVICE);
47 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
48 "bootindex");
49 }
50
vhost_vdpa_device_pci_post_init(VhostVdpaDevice * v,Error ** errp)51 static int vhost_vdpa_device_pci_post_init(VhostVdpaDevice *v, Error **errp)
52 {
53 VhostVdpaDevicePCI *dev = container_of(v, VhostVdpaDevicePCI, vdev);
54 VirtIOPCIProxy *vpci_dev = &dev->parent_obj;
55
56 vpci_dev->class_code = virtio_pci_get_class_id(v->vdev_id);
57 vpci_dev->trans_devid = virtio_pci_get_trans_devid(v->vdev_id);
58 /* one for config vector */
59 vpci_dev->nvectors = v->num_queues + 1;
60
61 return 0;
62 }
63
64 static void
vhost_vdpa_device_pci_realize(VirtIOPCIProxy * vpci_dev,Error ** errp)65 vhost_vdpa_device_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
66 {
67 VhostVdpaDevicePCI *dev = VHOST_VDPA_DEVICE_PCI(vpci_dev);
68
69 dev->vdev.post_init = vhost_vdpa_device_pci_post_init;
70 qdev_realize(DEVICE(&dev->vdev), BUS(&vpci_dev->bus), errp);
71 }
72
vhost_vdpa_device_pci_class_init(ObjectClass * klass,const void * data)73 static void vhost_vdpa_device_pci_class_init(ObjectClass *klass,
74 const void *data)
75 {
76 DeviceClass *dc = DEVICE_CLASS(klass);
77 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
78
79 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
80 k->realize = vhost_vdpa_device_pci_realize;
81 }
82
83 static const VirtioPCIDeviceTypeInfo vhost_vdpa_device_pci_info = {
84 .base_name = TYPE_VHOST_VDPA_DEVICE_PCI,
85 .generic_name = "vhost-vdpa-device-pci",
86 .transitional_name = "vhost-vdpa-device-pci-transitional",
87 .non_transitional_name = "vhost-vdpa-device-pci-non-transitional",
88 .instance_size = sizeof(VhostVdpaDevicePCI),
89 .instance_init = vhost_vdpa_device_pci_instance_init,
90 .class_init = vhost_vdpa_device_pci_class_init,
91 };
92
vhost_vdpa_device_pci_register(void)93 static void vhost_vdpa_device_pci_register(void)
94 {
95 virtio_pci_types_register(&vhost_vdpa_device_pci_info);
96 }
97
98 type_init(vhost_vdpa_device_pci_register);
99