1 | /* |
2 | * Vhost user blk PCI Bindings |
3 | * |
4 | * Copyright(C) 2017 Intel Corporation. |
5 | * |
6 | * Authors: |
7 | * Changpeng Liu <changpeng.liu@intel.com> |
8 | * |
9 | * Largely based on the "vhost-user-scsi.c" and "vhost-scsi.c" implemented by: |
10 | * Felipe Franciosi <felipe@nutanix.com> |
11 | * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> |
12 | * Nicholas Bellinger <nab@risingtidesystems.com> |
13 | * |
14 | * This work is licensed under the terms of the GNU LGPL, version 2 or later. |
15 | * See the COPYING.LIB file in the top-level directory. |
16 | * |
17 | */ |
18 | |
19 | #include "qemu/osdep.h" |
20 | |
21 | #include "standard-headers/linux/virtio_pci.h" |
22 | #include "hw/virtio/virtio.h" |
23 | #include "hw/virtio/vhost-user-blk.h" |
24 | #include "hw/pci/pci.h" |
25 | #include "hw/qdev-properties.h" |
26 | #include "qapi/error.h" |
27 | #include "qemu/error-report.h" |
28 | #include "qemu/module.h" |
29 | #include "virtio-pci.h" |
30 | |
31 | typedef struct VHostUserBlkPCI VHostUserBlkPCI; |
32 | |
33 | /* |
34 | * vhost-user-blk-pci: This extends VirtioPCIProxy. |
35 | */ |
36 | #define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci-base" |
37 | #define VHOST_USER_BLK_PCI(obj) \ |
38 | OBJECT_CHECK(VHostUserBlkPCI, (obj), TYPE_VHOST_USER_BLK_PCI) |
39 | |
40 | struct VHostUserBlkPCI { |
41 | VirtIOPCIProxy parent_obj; |
42 | VHostUserBlk vdev; |
43 | }; |
44 | |
45 | static Property vhost_user_blk_pci_properties[] = { |
46 | DEFINE_PROP_UINT32("class" , VirtIOPCIProxy, class_code, 0), |
47 | DEFINE_PROP_UINT32("vectors" , VirtIOPCIProxy, nvectors, |
48 | DEV_NVECTORS_UNSPECIFIED), |
49 | DEFINE_PROP_END_OF_LIST(), |
50 | }; |
51 | |
52 | static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) |
53 | { |
54 | VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev); |
55 | DeviceState *vdev = DEVICE(&dev->vdev); |
56 | |
57 | if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { |
58 | vpci_dev->nvectors = dev->vdev.num_queues + 1; |
59 | } |
60 | |
61 | qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); |
62 | object_property_set_bool(OBJECT(vdev), true, "realized" , errp); |
63 | } |
64 | |
65 | static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data) |
66 | { |
67 | DeviceClass *dc = DEVICE_CLASS(klass); |
68 | VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); |
69 | PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); |
70 | |
71 | set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); |
72 | dc->props = vhost_user_blk_pci_properties; |
73 | k->realize = vhost_user_blk_pci_realize; |
74 | pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
75 | pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; |
76 | pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; |
77 | pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; |
78 | } |
79 | |
80 | static void vhost_user_blk_pci_instance_init(Object *obj) |
81 | { |
82 | VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj); |
83 | |
84 | virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), |
85 | TYPE_VHOST_USER_BLK); |
86 | object_property_add_alias(obj, "bootindex" , OBJECT(&dev->vdev), |
87 | "bootindex" , &error_abort); |
88 | } |
89 | |
90 | static const VirtioPCIDeviceTypeInfo vhost_user_blk_pci_info = { |
91 | .base_name = TYPE_VHOST_USER_BLK_PCI, |
92 | .generic_name = "vhost-user-blk-pci" , |
93 | .transitional_name = "vhost-user-blk-pci-transitional" , |
94 | .non_transitional_name = "vhost-user-blk-pci-non-transitional" , |
95 | .instance_size = sizeof(VHostUserBlkPCI), |
96 | .instance_init = vhost_user_blk_pci_instance_init, |
97 | .class_init = vhost_user_blk_pci_class_init, |
98 | }; |
99 | |
100 | static void vhost_user_blk_pci_register(void) |
101 | { |
102 | virtio_pci_types_register(&vhost_user_blk_pci_info); |
103 | } |
104 | |
105 | type_init(vhost_user_blk_pci_register) |
106 | |