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 "qapi/error.h"
26 #include "qemu/error-report.h"
27 #include "hw/pci/msi.h"
28 #include "hw/pci/msix.h"
29 #include "hw/loader.h"
30 #include "sysemu/kvm.h"
31 #include "virtio-pci.h"
32 
33 typedef struct VHostUserSCSIPCI VHostUserSCSIPCI;
34 
35 #define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci-base"
36 #define VHOST_USER_SCSI_PCI(obj) \
37         OBJECT_CHECK(VHostUserSCSIPCI, (obj), TYPE_VHOST_USER_SCSI_PCI)
38 
39 struct VHostUserSCSIPCI {
40     VirtIOPCIProxy parent_obj;
41     VHostUserSCSI vdev;
42 };
43 
44 static Property vhost_user_scsi_pci_properties[] = {
45     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
46                        DEV_NVECTORS_UNSPECIFIED),
47     DEFINE_PROP_END_OF_LIST(),
48 };
49 
50 static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
51 {
52     VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev);
53     DeviceState *vdev = DEVICE(&dev->vdev);
54     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
55 
56     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
57         vpci_dev->nvectors = vs->conf.num_queues + 3;
58     }
59 
60     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
61     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
62 }
63 
64 static void vhost_user_scsi_pci_class_init(ObjectClass *klass, 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_user_scsi_pci_realize;
70     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
71     dc->props = vhost_user_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 
78 static void vhost_user_scsi_pci_instance_init(Object *obj)
79 {
80     VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj);
81 
82     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
83                                 TYPE_VHOST_USER_SCSI);
84     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
85                               "bootindex", &error_abort);
86 }
87 
88 static const VirtioPCIDeviceTypeInfo vhost_user_scsi_pci_info = {
89     .base_name             = TYPE_VHOST_USER_SCSI_PCI,
90     .generic_name          = "vhost-user-scsi-pci",
91     .transitional_name     = "vhost-user-scsi-pci-transitional",
92     .non_transitional_name = "vhost-user-scsi-pci-non-transitional",
93     .instance_size = sizeof(VHostUserSCSIPCI),
94     .instance_init = vhost_user_scsi_pci_instance_init,
95     .class_init    = vhost_user_scsi_pci_class_init,
96 };
97 
98 static void vhost_user_scsi_pci_register(void)
99 {
100     virtio_pci_types_register(&vhost_user_scsi_pci_info);
101 }
102 
103 type_init(vhost_user_scsi_pci_register)
104