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1 /*
2 * Virtio scsi 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 or
12 * (at your option) any later version. See the COPYING file in the
13 * top-level directory.
14 */
15
16 #include "qemu/osdep.h"
17
18 #include "hw/core/qdev-properties.h"
19 #include "hw/virtio/virtio-scsi.h"
20 #include "qemu/module.h"
21 #include "hw/virtio/virtio-pci.h"
22 #include "qom/object.h"
23
24 typedef struct VirtIOSCSIPCI VirtIOSCSIPCI;
25
26 /*
27 * virtio-scsi-pci: This extends VirtioPCIProxy.
28 */
29 #define TYPE_VIRTIO_SCSI_PCI "virtio-scsi-pci-base"
30 DECLARE_INSTANCE_CHECKER(VirtIOSCSIPCI, VIRTIO_SCSI_PCI,
31 TYPE_VIRTIO_SCSI_PCI)
32
33 struct VirtIOSCSIPCI {
34 VirtIOPCIProxy parent_obj;
35 VirtIOSCSI vdev;
36 };
37
38 static const Property virtio_scsi_pci_properties[] = {
39 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
40 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
41 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
42 DEV_NVECTORS_UNSPECIFIED),
43 };
44
45 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
46 {
47 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
48 DeviceState *vdev = DEVICE(&dev->vdev);
49 DeviceState *proxy = DEVICE(vpci_dev);
50 VirtIOSCSIConf *conf = &dev->vdev.parent_obj.conf;
51 char *bus_name;
52
53 if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) {
54 conf->num_queues =
55 virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED);
56 }
57
58 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
59 vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1;
60 }
61
62 /*
63 * For command line compatibility, this sets the virtio-scsi-device bus
64 * name as before.
65 */
66 if (proxy->id) {
67 bus_name = g_strdup_printf("%s.0", proxy->id);
68 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
69 g_free(bus_name);
70 }
71
72 qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
73 }
74
75 static void virtio_scsi_pci_class_init(ObjectClass *klass, const void *data)
76 {
77 DeviceClass *dc = DEVICE_CLASS(klass);
78 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
79 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
80
81 k->realize = virtio_scsi_pci_realize;
82 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
83 device_class_set_props(dc, virtio_scsi_pci_properties);
84 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
85 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
86 pcidev_k->revision = 0x00;
87 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
88 }
89
90 static void virtio_scsi_pci_instance_init(Object *obj)
91 {
92 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
93
94 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
95 TYPE_VIRTIO_SCSI);
96 }
97
98 static const VirtioPCIDeviceTypeInfo virtio_scsi_pci_info = {
99 .base_name = TYPE_VIRTIO_SCSI_PCI,
100 .generic_name = "virtio-scsi-pci",
101 .transitional_name = "virtio-scsi-pci-transitional",
102 .non_transitional_name = "virtio-scsi-pci-non-transitional",
103 .instance_size = sizeof(VirtIOSCSIPCI),
104 .instance_init = virtio_scsi_pci_instance_init,
105 .class_init = virtio_scsi_pci_class_init,
106 };
107
108 static void virtio_scsi_pci_register(void)
109 {
110 virtio_pci_types_register(&virtio_scsi_pci_info);
111 }
112
113 type_init(virtio_scsi_pci_register)