| 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" |
| 20 | #include "hw/core/qdev-properties.h" |
| 21 | #include "hw/virtio/vhost-scsi.h" |
| 22 | #include "qapi/error.h" |
| 23 | #include "qemu/module.h" |
| 24 | #include "hw/virtio/virtio-pci.h" |
| 25 | #include "qom/object.h" |
| 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" |
| 33 | DECLARE_INSTANCE_CHECKER(VHostSCSIPCI, VHOST_SCSI_PCI, |
| 34 | TYPE_VHOST_SCSI_PCI) |
| 35 | |
| 36 | struct VHostSCSIPCI { |
| 37 | VirtIOPCIProxy parent_obj; |
| 38 | VHostSCSI vdev; |
| 39 | }; |
| 40 | |
| 41 | static const Property vhost_scsi_pci_properties[] = { |
| 42 | DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, |
| 43 | DEV_NVECTORS_UNSPECIFIED), |
| 44 | }; |
| 45 | |
| 46 | static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) |
| 47 | { |
| 48 | VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev); |
| 49 | DeviceState *vdev = DEVICE(&dev->vdev); |
| 50 | VirtIOSCSIConf *conf = &dev->vdev.parent_obj.parent_obj.conf; |
| 51 | |
| 52 | if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) { |
| 53 | conf->num_queues = |
| 54 | virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED); |
| 55 | } |
| 56 | |
| 57 | if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { |
| 58 | vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1; |
| 59 | } |
| 60 | |
| 61 | qdev_realize(vdev, BUS(&vpci_dev->bus), errp); |
| 62 | } |
| 63 | |
| 64 | static void vhost_scsi_pci_class_init(ObjectClass *klass, const 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_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; |
| 76 | } |
| 77 | |
| 78 | static void vhost_scsi_pci_instance_init(Object *obj) |
| 79 | { |
| 80 | VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj); |
| 81 | |
| 82 | virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), |
| 83 | TYPE_VHOST_SCSI); |
| 84 | object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), |
| 85 | "bootindex"); |
| 86 | } |
| 87 | |
| 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, |
| 96 | }; |
| 97 | |
| 98 | static void vhost_scsi_pci_register(void) |
| 99 | { |
| 100 | virtio_pci_types_register(&vhost_scsi_pci_info); |
| 101 | } |
| 102 | |
| 103 | type_init(vhost_scsi_pci_register) |