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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/core/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/core/loader.h"
32 #include "system/kvm.h"
33 #include "hw/virtio/virtio-pci.h"
34 #include "qom/object.h"
35
36 typedef struct VHostUserSCSIPCI VHostUserSCSIPCI;
37
38 #define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci-base"
39 DECLARE_INSTANCE_CHECKER(VHostUserSCSIPCI, VHOST_USER_SCSI_PCI,
40 TYPE_VHOST_USER_SCSI_PCI)
41
42 struct VHostUserSCSIPCI {
43 VirtIOPCIProxy parent_obj;
44 VHostUserSCSI vdev;
45 };
46
47 static const Property vhost_user_scsi_pci_properties[] = {
48 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
49 DEV_NVECTORS_UNSPECIFIED),
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 VirtIOSCSIConf *conf = &dev->vdev.parent_obj.parent_obj.conf;
57
58 if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) {
59 conf->num_queues =
60 virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED);
61 }
62
63 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
64 vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1;
65 }
66
67 qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
68 }
69
70 static void vhost_user_scsi_pci_class_init(ObjectClass *klass, const void *data)
71 {
72 DeviceClass *dc = DEVICE_CLASS(klass);
73 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
74 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
75 k->realize = vhost_user_scsi_pci_realize;
76 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
77 device_class_set_props(dc, vhost_user_scsi_pci_properties);
78 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
79 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
80 pcidev_k->revision = 0x00;
81 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
82 }
83
84 static void vhost_user_scsi_pci_instance_init(Object *obj)
85 {
86 VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj);
87
88 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
89 TYPE_VHOST_USER_SCSI);
90 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
91 "bootindex");
92 }
93
94 static const VirtioPCIDeviceTypeInfo vhost_user_scsi_pci_info = {
95 .base_name = TYPE_VHOST_USER_SCSI_PCI,
96 .generic_name = "vhost-user-scsi-pci",
97 .transitional_name = "vhost-user-scsi-pci-transitional",
98 .non_transitional_name = "vhost-user-scsi-pci-non-transitional",
99 .instance_size = sizeof(VHostUserSCSIPCI),
100 .instance_init = vhost_user_scsi_pci_instance_init,
101 .class_init = vhost_user_scsi_pci_class_init,
102 };
103
104 static void vhost_user_scsi_pci_register(void)
105 {
106 virtio_pci_types_register(&vhost_user_scsi_pci_info);
107 }
108
109 type_init(vhost_user_scsi_pci_register)