2 * Vhost scsi PCI bindings
4 * Copyright IBM, Corp. 2011
7 * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
9 * Changes for QEMU mainline + tcm_vhost kernel upstream:
10 * Nicholas Bellinger <nab@risingtidesystems.com>
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.
17 #include "qemu/osdep.h"
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 "virtio-pci.h"
26 typedef struct VHostSCSIPCI VHostSCSIPCI
;
29 * vhost-scsi-pci: This extends VirtioPCIProxy.
31 #define TYPE_VHOST_SCSI_PCI "vhost-scsi-pci-base"
32 #define VHOST_SCSI_PCI(obj) \
33 OBJECT_CHECK(VHostSCSIPCI, (obj), TYPE_VHOST_SCSI_PCI)
36 VirtIOPCIProxy parent_obj
;
40 static Property vhost_scsi_pci_properties
[] = {
41 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
,
42 DEV_NVECTORS_UNSPECIFIED
),
43 DEFINE_PROP_END_OF_LIST(),
46 static void vhost_scsi_pci_realize(VirtIOPCIProxy
*vpci_dev
, Error
**errp
)
48 VHostSCSIPCI
*dev
= VHOST_SCSI_PCI(vpci_dev
);
49 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
50 VirtIOSCSIConf
*conf
= &dev
->vdev
.parent_obj
.parent_obj
.conf
;
52 if (conf
->num_queues
== VIRTIO_SCSI_AUTO_NUM_QUEUES
) {
54 virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED
);
57 if (vpci_dev
->nvectors
== DEV_NVECTORS_UNSPECIFIED
) {
58 vpci_dev
->nvectors
= conf
->num_queues
+ VIRTIO_SCSI_VQ_NUM_FIXED
+ 1;
61 qdev_realize(vdev
, BUS(&vpci_dev
->bus
), errp
);
64 static void vhost_scsi_pci_class_init(ObjectClass
*klass
, void *data
)
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
;
78 static void vhost_scsi_pci_instance_init(Object
*obj
)
80 VHostSCSIPCI
*dev
= VHOST_SCSI_PCI(obj
);
82 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
84 object_property_add_alias(obj
, "bootindex", OBJECT(&dev
->vdev
),
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
,
98 static void vhost_scsi_pci_register(void)
100 virtio_pci_types_register(&vhost_scsi_pci_info
);
103 type_init(vhost_scsi_pci_register
)