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7dc76896 JQ |
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" | |
a27bd6c7 | 20 | #include "hw/qdev-properties.h" |
7dc76896 JQ |
21 | #include "hw/virtio/vhost-scsi.h" |
22 | #include "qapi/error.h" | |
0b8fa32f | 23 | #include "qemu/module.h" |
e1b1f534 | 24 | #include "hw/virtio/virtio-pci.h" |
db1015e9 | 25 | #include "qom/object.h" |
7dc76896 JQ |
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" | |
8110fa1d EH |
33 | DECLARE_INSTANCE_CHECKER(VHostSCSIPCI, VHOST_SCSI_PCI, |
34 | TYPE_VHOST_SCSI_PCI) | |
7dc76896 JQ |
35 | |
36 | struct VHostSCSIPCI { | |
37 | VirtIOPCIProxy parent_obj; | |
38 | VHostSCSI vdev; | |
39 | }; | |
40 | ||
41 | static Property vhost_scsi_pci_properties[] = { | |
42 | DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, | |
43 | DEV_NVECTORS_UNSPECIFIED), | |
44 | DEFINE_PROP_END_OF_LIST(), | |
45 | }; | |
46 | ||
47 | static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) | |
48 | { | |
49 | VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev); | |
50 | DeviceState *vdev = DEVICE(&dev->vdev); | |
6a558822 SH |
51 | VirtIOSCSIConf *conf = &dev->vdev.parent_obj.parent_obj.conf; |
52 | ||
53 | if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) { | |
54 | conf->num_queues = | |
55 | virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED); | |
56 | } | |
7dc76896 JQ |
57 | |
58 | if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { | |
6a558822 | 59 | vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1; |
7dc76896 JQ |
60 | } |
61 | ||
99ba777e | 62 | qdev_realize(vdev, BUS(&vpci_dev->bus), errp); |
7dc76896 JQ |
63 | } |
64 | ||
65 | static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data) | |
66 | { | |
67 | DeviceClass *dc = DEVICE_CLASS(klass); | |
68 | VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); | |
69 | PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); | |
70 | k->realize = vhost_scsi_pci_realize; | |
71 | set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); | |
4f67d30b | 72 | device_class_set_props(dc, vhost_scsi_pci_properties); |
7dc76896 JQ |
73 | pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
74 | pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; | |
75 | pcidev_k->revision = 0x00; | |
76 | pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; | |
77 | } | |
78 | ||
79 | static void vhost_scsi_pci_instance_init(Object *obj) | |
80 | { | |
81 | VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj); | |
82 | ||
83 | virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), | |
84 | TYPE_VHOST_SCSI); | |
85 | object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), | |
d2623129 | 86 | "bootindex"); |
7dc76896 JQ |
87 | } |
88 | ||
89 | static const VirtioPCIDeviceTypeInfo vhost_scsi_pci_info = { | |
90 | .base_name = TYPE_VHOST_SCSI_PCI, | |
91 | .generic_name = "vhost-scsi-pci", | |
92 | .transitional_name = "vhost-scsi-pci-transitional", | |
93 | .non_transitional_name = "vhost-scsi-pci-non-transitional", | |
94 | .instance_size = sizeof(VHostSCSIPCI), | |
95 | .instance_init = vhost_scsi_pci_instance_init, | |
96 | .class_init = vhost_scsi_pci_class_init, | |
97 | }; | |
98 | ||
99 | static void vhost_scsi_pci_register(void) | |
100 | { | |
101 | virtio_pci_types_register(&vhost_scsi_pci_info); | |
102 | } | |
103 | ||
104 | type_init(vhost_scsi_pci_register) |