1 /*
2  * Vhost user scsi PCI Bindings
3  *
4  * Copyright (c) 2016 Nutanix Inc. All rights reserved.
5  *
6  * Author:
7  *  Felipe Franciosi <felipe@nutanix.com>
8  *
9  * This work is largely based on the "vhost-scsi" implementation by:
10  *  Stefan Hajnoczi    <stefanha@linux.vnet.ibm.com>
11  *  Nicholas Bellinger <nab@risingtidesystems.com>
12  *
13  * This work is licensed under the terms of the GNU LGPL, version 2 or later.
14  * See the COPYING.LIB file in the top-level directory.
15  *
16  */
17 
18 #include "qemu/osdep.h"
19 
20 #include "standard-headers/linux/virtio_pci.h"
21 #include "hw/virtio/vhost-user-scsi.h"
22 #include "hw/virtio/virtio.h"
23 #include "hw/virtio/virtio-scsi.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 "hw/pci/msi.h"
30 #include "hw/pci/msix.h"
31 #include "hw/loader.h"
32 #include "sysemu/kvm.h"
33 #include "virtio-pci.h"
34 
35 typedef struct VHostUserSCSIPCI VHostUserSCSIPCI;
36 
37 #define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci-base"
38 #define VHOST_USER_SCSI_PCI(obj) \
39         OBJECT_CHECK(VHostUserSCSIPCI, (obj), TYPE_VHOST_USER_SCSI_PCI)
40 
41 struct VHostUserSCSIPCI {
42     VirtIOPCIProxy parent_obj;
43     VHostUserSCSI vdev;
44 };
45 
46 static Property vhost_user_scsi_pci_properties[] = {
47     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
48                        DEV_NVECTORS_UNSPECIFIED),
49     DEFINE_PROP_END_OF_LIST(),
50 };
51 
52 static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
53 {
54     VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev);
55     DeviceState *vdev = DEVICE(&dev->vdev);
56     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
57 
58     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
59         vpci_dev->nvectors = vs->conf.num_queues + 3;
60     }
61 
62     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
63     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
64 }
65 
66 static void vhost_user_scsi_pci_class_init(ObjectClass *klass, 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     k->realize = vhost_user_scsi_pci_realize;
72     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
73     dc->props = vhost_user_scsi_pci_properties;
74     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
75     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
76     pcidev_k->revision = 0x00;
77     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
78 }
79 
80 static void vhost_user_scsi_pci_instance_init(Object *obj)
81 {
82     VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj);
83 
84     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
85                                 TYPE_VHOST_USER_SCSI);
86     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
87                               "bootindex", &error_abort);
88 }
89 
90 static const VirtioPCIDeviceTypeInfo vhost_user_scsi_pci_info = {
91     .base_name             = TYPE_VHOST_USER_SCSI_PCI,
92     .generic_name          = "vhost-user-scsi-pci",
93     .transitional_name     = "vhost-user-scsi-pci-transitional",
94     .non_transitional_name = "vhost-user-scsi-pci-non-transitional",
95     .instance_size = sizeof(VHostUserSCSIPCI),
96     .instance_init = vhost_user_scsi_pci_instance_init,
97     .class_init    = vhost_user_scsi_pci_class_init,
98 };
99 
100 static void vhost_user_scsi_pci_register(void)
101 {
102     virtio_pci_types_register(&vhost_user_scsi_pci_info);
103 }
104 
105 type_init(vhost_user_scsi_pci_register)
106