1 /*
2 * Virtio blk PCI Bindings
3 *
4 * Copyright IBM, Corp. 2007
5 * Copyright (c) 2009 CodeSourcery
6 *
7 * Authors:
8 * Anthony Liguori <aliguori@us.ibm.com>
9 * Paul Brook <paul@codesourcery.com>
10 *
11 * This work is licensed under the terms of the GNU GPL, version 2. See
12 * the COPYING file in the top-level directory.
13 *
14 * Contributions after 2012-01-13 are licensed under the terms of the
15 * GNU GPL, version 2 or (at your option) any later version.
16 */
17
18 #include "qemu/osdep.h"
19
20 #include "hw/qdev-properties.h"
21 #include "hw/virtio/virtio-blk.h"
22 #include "hw/virtio/virtio-pci.h"
23 #include "qapi/error.h"
24 #include "qemu/module.h"
25 #include "qom/object.h"
26
27 typedef struct VirtIOBlkPCI VirtIOBlkPCI;
28
29 /*
30 * virtio-blk-pci: This extends VirtioPCIProxy.
31 */
32 #define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci-base"
33 DECLARE_INSTANCE_CHECKER(VirtIOBlkPCI, VIRTIO_BLK_PCI,
34 TYPE_VIRTIO_BLK_PCI)
35
36 struct VirtIOBlkPCI {
37 VirtIOPCIProxy parent_obj;
38 VirtIOBlock vdev;
39 };
40
41 static const Property virtio_blk_pci_properties[] = {
42 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
43 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
44 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
45 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
46 DEV_NVECTORS_UNSPECIFIED),
47 };
48
virtio_blk_pci_realize(VirtIOPCIProxy * vpci_dev,Error ** errp)49 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
50 {
51 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
52 DeviceState *vdev = DEVICE(&dev->vdev);
53 VirtIOBlkConf *conf = &dev->vdev.conf;
54
55 if (conf->num_queues == VIRTIO_BLK_AUTO_NUM_QUEUES) {
56 conf->num_queues = virtio_pci_optimal_num_queues(0);
57 }
58
59 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
60 vpci_dev->nvectors = conf->num_queues + 1;
61 }
62
63 qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
64 }
65
virtio_blk_pci_class_init(ObjectClass * klass,const void * data)66 static void virtio_blk_pci_class_init(ObjectClass *klass, const void *data)
67 {
68 DeviceClass *dc = DEVICE_CLASS(klass);
69 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
70 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
71
72 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
73 device_class_set_props(dc, virtio_blk_pci_properties);
74 k->realize = virtio_blk_pci_realize;
75 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
76 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
77 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
78 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
79 }
80
virtio_blk_pci_instance_init(Object * obj)81 static void virtio_blk_pci_instance_init(Object *obj)
82 {
83 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
84
85 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
86 TYPE_VIRTIO_BLK);
87 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
88 "bootindex");
89 }
90
91 static const VirtioPCIDeviceTypeInfo virtio_blk_pci_info = {
92 .base_name = TYPE_VIRTIO_BLK_PCI,
93 .generic_name = "virtio-blk-pci",
94 .transitional_name = "virtio-blk-pci-transitional",
95 .non_transitional_name = "virtio-blk-pci-non-transitional",
96 .instance_size = sizeof(VirtIOBlkPCI),
97 .instance_init = virtio_blk_pci_instance_init,
98 .class_init = virtio_blk_pci_class_init,
99 };
100
virtio_blk_pci_register(void)101 static void virtio_blk_pci_register(void)
102 {
103 virtio_pci_types_register(&virtio_blk_pci_info);
104 }
105
106 type_init(virtio_blk_pci_register)
107