qemu

FORK: QEMU emulator
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vhost-user-fs-pci.c (2809B)

      1 /*
      2  * Vhost-user filesystem virtio device PCI glue
      3  *
      4  * Copyright 2018-2019 Red Hat, Inc.
      5  *
      6  * Authors:
      7  *  Dr. David Alan Gilbert <dgilbert@redhat.com>
      8  *
      9  * This work is licensed under the terms of the GNU GPL, version 2 or
     10  * (at your option) any later version.  See the COPYING file in the
     11  * top-level directory.
     12  */
     13 
     14 #include "qemu/osdep.h"
     15 #include "hw/qdev-properties.h"
     16 #include "hw/virtio/vhost-user-fs.h"
     17 #include "hw/virtio/virtio-pci.h"
     18 #include "qom/object.h"
     19 
     20 struct VHostUserFSPCI {
     21     VirtIOPCIProxy parent_obj;
     22     VHostUserFS vdev;
     23 };
     24 
     25 typedef struct VHostUserFSPCI VHostUserFSPCI;
     26 
     27 #define TYPE_VHOST_USER_FS_PCI "vhost-user-fs-pci-base"
     28 
     29 DECLARE_INSTANCE_CHECKER(VHostUserFSPCI, VHOST_USER_FS_PCI,
     30                          TYPE_VHOST_USER_FS_PCI)
     31 
     32 static Property vhost_user_fs_pci_properties[] = {
     33     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
     34                        DEV_NVECTORS_UNSPECIFIED),
     35     DEFINE_PROP_END_OF_LIST(),
     36 };
     37 
     38 static void vhost_user_fs_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     39 {
     40     VHostUserFSPCI *dev = VHOST_USER_FS_PCI(vpci_dev);
     41     DeviceState *vdev = DEVICE(&dev->vdev);
     42 
     43     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
     44         /* Also reserve config change and hiprio queue vectors */
     45         vpci_dev->nvectors = dev->vdev.conf.num_request_queues + 2;
     46     }
     47 
     48     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
     49 }
     50 
     51 static void vhost_user_fs_pci_class_init(ObjectClass *klass, void *data)
     52 {
     53     DeviceClass *dc = DEVICE_CLASS(klass);
     54     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
     55     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
     56     k->realize = vhost_user_fs_pci_realize;
     57     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
     58     device_class_set_props(dc, vhost_user_fs_pci_properties);
     59     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
     60     pcidev_k->device_id = 0; /* Set by virtio-pci based on virtio id */
     61     pcidev_k->revision = 0x00;
     62     pcidev_k->class_id = PCI_CLASS_STORAGE_OTHER;
     63 }
     64 
     65 static void vhost_user_fs_pci_instance_init(Object *obj)
     66 {
     67     VHostUserFSPCI *dev = VHOST_USER_FS_PCI(obj);
     68 
     69     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
     70                                 TYPE_VHOST_USER_FS);
     71     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
     72                               "bootindex");
     73 }
     74 
     75 static const VirtioPCIDeviceTypeInfo vhost_user_fs_pci_info = {
     76     .base_name             = TYPE_VHOST_USER_FS_PCI,
     77     .non_transitional_name = "vhost-user-fs-pci",
     78     .instance_size = sizeof(VHostUserFSPCI),
     79     .instance_init = vhost_user_fs_pci_instance_init,
     80     .class_init    = vhost_user_fs_pci_class_init,
     81 };
     82 
     83 static void vhost_user_fs_pci_register(void)
     84 {
     85     virtio_pci_types_register(&vhost_user_fs_pci_info);
     86 }
     87 
     88 type_init(vhost_user_fs_pci_register);