1 /*
2 * Vhost scsi PCI bindings
3 *
4 * Copyright IBM, Corp. 2011
5 *
6 * Authors:
7 * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
8 *
9 * Changes for QEMU mainline + tcm_vhost kernel upstream:
10 * Nicholas Bellinger <nab@risingtidesystems.com>
11 *
12 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
13 * See the COPYING.LIB file in the top-level directory.
14 *
15 */
16
17 #include "qemu/osdep.h"
18
19 #include "standard-headers/linux/virtio_pci.h"
20 #include "hw/qdev-properties.h"
21 #include "hw/virtio/vhost-scsi.h"
22 #include "qapi/error.h"
23 #include "qemu/module.h"
24 #include "hw/virtio/virtio-pci.h"
25 #include "qom/object.h"
26
27 typedef struct VHostSCSIPCI VHostSCSIPCI;
28
29 /*
30 * vhost-scsi-pci: This extends VirtioPCIProxy.
31 */
32 #define TYPE_VHOST_SCSI_PCI "vhost-scsi-pci-base"
33 DECLARE_INSTANCE_CHECKER(VHostSCSIPCI, VHOST_SCSI_PCI,
34 TYPE_VHOST_SCSI_PCI)
35
36 struct VHostSCSIPCI {
37 VirtIOPCIProxy parent_obj;
38 VHostSCSI vdev;
39 };
40
41 static const Property vhost_scsi_pci_properties[] = {
42 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
43 DEV_NVECTORS_UNSPECIFIED),
44 };
45
vhost_scsi_pci_realize(VirtIOPCIProxy * vpci_dev,Error ** errp)46 static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
47 {
48 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
49 DeviceState *vdev = DEVICE(&dev->vdev);
50 VirtIOSCSIConf *conf = &dev->vdev.parent_obj.parent_obj.conf;
51
52 if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) {
53 conf->num_queues =
54 virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED);
55 }
56
57 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
58 vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1;
59 }
60
61 qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
62 }
63
vhost_scsi_pci_class_init(ObjectClass * klass,const void * data)64 static void vhost_scsi_pci_class_init(ObjectClass *klass, const void *data)
65 {
66 DeviceClass *dc = DEVICE_CLASS(klass);
67 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
68 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
69 k->realize = vhost_scsi_pci_realize;
70 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
71 device_class_set_props(dc, vhost_scsi_pci_properties);
72 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
73 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
74 pcidev_k->revision = 0x00;
75 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
76 }
77
vhost_scsi_pci_instance_init(Object * obj)78 static void vhost_scsi_pci_instance_init(Object *obj)
79 {
80 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
81
82 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
83 TYPE_VHOST_SCSI);
84 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
85 "bootindex");
86 }
87
88 static const VirtioPCIDeviceTypeInfo vhost_scsi_pci_info = {
89 .base_name = TYPE_VHOST_SCSI_PCI,
90 .generic_name = "vhost-scsi-pci",
91 .transitional_name = "vhost-scsi-pci-transitional",
92 .non_transitional_name = "vhost-scsi-pci-non-transitional",
93 .instance_size = sizeof(VHostSCSIPCI),
94 .instance_init = vhost_scsi_pci_instance_init,
95 .class_init = vhost_scsi_pci_class_init,
96 };
97
vhost_scsi_pci_register(void)98 static void vhost_scsi_pci_register(void)
99 {
100 virtio_pci_types_register(&vhost_scsi_pci_info);
101 }
102
103 type_init(vhost_scsi_pci_register)
104