mirror of https://gitee.com/openkylin/qemu.git
110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
/*
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* Vhost user blk PCI Bindings
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*
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* Copyright(C) 2017 Intel Corporation.
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*
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* Authors:
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* Changpeng Liu <changpeng.liu@intel.com>
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*
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* Largely based on the "vhost-user-scsi.c" and "vhost-scsi.c" implemented by:
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* Felipe Franciosi <felipe@nutanix.com>
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* Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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* Nicholas Bellinger <nab@risingtidesystems.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2 or later.
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* See the COPYING.LIB file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "standard-headers/linux/virtio_pci.h"
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#include "hw/virtio/virtio.h"
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#include "hw/virtio/vhost-user-blk.h"
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#include "hw/pci/pci.h"
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#include "hw/qdev-properties.h"
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#include "qapi/error.h"
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#include "qemu/error-report.h"
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#include "qemu/module.h"
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#include "virtio-pci.h"
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#include "qom/object.h"
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typedef struct VHostUserBlkPCI VHostUserBlkPCI;
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/*
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* vhost-user-blk-pci: This extends VirtioPCIProxy.
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*/
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#define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci-base"
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DECLARE_INSTANCE_CHECKER(VHostUserBlkPCI, VHOST_USER_BLK_PCI,
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TYPE_VHOST_USER_BLK_PCI)
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struct VHostUserBlkPCI {
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VirtIOPCIProxy parent_obj;
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VHostUserBlk vdev;
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};
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static Property vhost_user_blk_pci_properties[] = {
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DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
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DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
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DEV_NVECTORS_UNSPECIFIED),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
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{
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VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev);
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DeviceState *vdev = DEVICE(&dev->vdev);
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if (dev->vdev.num_queues == VHOST_USER_BLK_AUTO_NUM_QUEUES) {
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dev->vdev.num_queues = virtio_pci_optimal_num_queues(0);
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}
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if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
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vpci_dev->nvectors = dev->vdev.num_queues + 1;
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}
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qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
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}
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static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
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PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
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set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
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device_class_set_props(dc, vhost_user_blk_pci_properties);
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k->realize = vhost_user_blk_pci_realize;
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pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
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pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
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pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
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pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
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}
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static void vhost_user_blk_pci_instance_init(Object *obj)
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{
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VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj);
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virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
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TYPE_VHOST_USER_BLK);
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object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
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"bootindex");
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}
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static const VirtioPCIDeviceTypeInfo vhost_user_blk_pci_info = {
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.base_name = TYPE_VHOST_USER_BLK_PCI,
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.generic_name = "vhost-user-blk-pci",
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.transitional_name = "vhost-user-blk-pci-transitional",
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.non_transitional_name = "vhost-user-blk-pci-non-transitional",
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.instance_size = sizeof(VHostUserBlkPCI),
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.instance_init = vhost_user_blk_pci_instance_init,
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.class_init = vhost_user_blk_pci_class_init,
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};
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static void vhost_user_blk_pci_register(void)
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{
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virtio_pci_types_register(&vhost_user_blk_pci_info);
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}
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type_init(vhost_user_blk_pci_register)
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