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fedda617 LM |
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 | ||
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 | ||
51 | static Property vhost_vdpa_device_pci_properties[] = { | |
52 | DEFINE_PROP_END_OF_LIST(), | |
53 | }; | |
54 | ||
55 | static int vhost_vdpa_device_pci_post_init(VhostVdpaDevice *v, Error **errp) | |
56 | { | |
57 | VhostVdpaDevicePCI *dev = container_of(v, VhostVdpaDevicePCI, vdev); | |
58 | VirtIOPCIProxy *vpci_dev = &dev->parent_obj; | |
59 | ||
60 | vpci_dev->class_code = virtio_pci_get_class_id(v->vdev_id); | |
61 | vpci_dev->trans_devid = virtio_pci_get_trans_devid(v->vdev_id); | |
62 | /* one for config vector */ | |
63 | vpci_dev->nvectors = v->num_queues + 1; | |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
68 | static void | |
69 | vhost_vdpa_device_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) | |
70 | { | |
71 | VhostVdpaDevicePCI *dev = VHOST_VDPA_DEVICE_PCI(vpci_dev); | |
72 | ||
73 | dev->vdev.post_init = vhost_vdpa_device_pci_post_init; | |
74 | qdev_realize(DEVICE(&dev->vdev), BUS(&vpci_dev->bus), errp); | |
75 | } | |
76 | ||
77 | static void vhost_vdpa_device_pci_class_init(ObjectClass *klass, void *data) | |
78 | { | |
79 | DeviceClass *dc = DEVICE_CLASS(klass); | |
80 | VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); | |
81 | ||
82 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); | |
83 | device_class_set_props(dc, vhost_vdpa_device_pci_properties); | |
84 | k->realize = vhost_vdpa_device_pci_realize; | |
85 | } | |
86 | ||
87 | static const VirtioPCIDeviceTypeInfo vhost_vdpa_device_pci_info = { | |
88 | .base_name = TYPE_VHOST_VDPA_DEVICE_PCI, | |
89 | .generic_name = "vhost-vdpa-device-pci", | |
90 | .transitional_name = "vhost-vdpa-device-pci-transitional", | |
91 | .non_transitional_name = "vhost-vdpa-device-pci-non-transitional", | |
92 | .instance_size = sizeof(VhostVdpaDevicePCI), | |
93 | .instance_init = vhost_vdpa_device_pci_instance_init, | |
94 | .class_init = vhost_vdpa_device_pci_class_init, | |
95 | }; | |
96 | ||
97 | static void vhost_vdpa_device_pci_register(void) | |
98 | { | |
99 | virtio_pci_types_register(&vhost_vdpa_device_pci_info); | |
100 | } | |
101 | ||
102 | type_init(vhost_vdpa_device_pci_register); |