hw/virtio/vhost-user-blk-pci.c

   1 /*
   2  * Vhost user blk PCI Bindings
   3  *
   4  * Copyright(C) 2017 Intel Corporation.
   5  *
   6  * Authors:
   7  *  Changpeng Liu <changpeng.liu@intel.com>
   8  *
   9  * Largely based on the "vhost-user-scsi.c" and "vhost-scsi.c" implemented by:
  10  * Felipe Franciosi <felipe@nutanix.com>
  11  * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
  12  * Nicholas Bellinger <nab@risingtidesystems.com>
  13  *
  14  * This work is licensed under the terms of the GNU LGPL, version 2 or later.
  15  * See the COPYING.LIB file in the top-level directory.
  16  *
  17  */
  18
  19 #include "qemu/osdep.h"
  20
  21 #include "standard-headers/linux/virtio_pci.h"
  22 #include "hw/virtio/virtio.h"
  23 #include "hw/virtio/vhost-user-blk.h"
  24 #include "hw/pci/pci.h"
  25 #include "qapi/error.h"
  26 #include "qemu/error-report.h"
  27 #include "qemu/module.h"
  28 #include "virtio-pci.h"
  29
  30 typedef struct VHostUserBlkPCI VHostUserBlkPCI;
  31
  32 /*
  33  * vhost-user-blk-pci: This extends VirtioPCIProxy.
  34  */
  35 #define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci-base"
  36 #define VHOST_USER_BLK_PCI(obj) \
  37         OBJECT_CHECK(VHostUserBlkPCI, (obj), TYPE_VHOST_USER_BLK_PCI)
  38
  39 struct VHostUserBlkPCI {
  40     VirtIOPCIProxy parent_obj;
  41     VHostUserBlk vdev;
  42 };
  43
  44 static Property vhost_user_blk_pci_properties[] = {
  45     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
  46     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  47                        DEV_NVECTORS_UNSPECIFIED),
  48     DEFINE_PROP_END_OF_LIST(),
  49 };
  50
  51 static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  52 {
  53     VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev);
  54     DeviceState *vdev = DEVICE(&dev->vdev);
  55
  56     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  57         vpci_dev->nvectors = dev->vdev.num_queues + 1;
  58     }
  59
  60     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
  61     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
  62 }
  63
  64 static void vhost_user_blk_pci_class_init(ObjectClass *klass, 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
  70     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  71     dc->props = vhost_user_blk_pci_properties;
  72     k->realize = vhost_user_blk_pci_realize;
  73     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  74     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
  75     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  76     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  77 }
  78
  79 static void vhost_user_blk_pci_instance_init(Object *obj)
  80 {
  81     VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj);
  82
  83     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  84                                 TYPE_VHOST_USER_BLK);
  85     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  86                               "bootindex", &error_abort);
  87 }
  88
  89 static const VirtioPCIDeviceTypeInfo vhost_user_blk_pci_info = {
  90     .base_name               = TYPE_VHOST_USER_BLK_PCI,
  91     .generic_name            = "vhost-user-blk-pci",
  92     .transitional_name       = "vhost-user-blk-pci-transitional",
  93     .non_transitional_name   = "vhost-user-blk-pci-non-transitional",
  94     .instance_size  = sizeof(VHostUserBlkPCI),
  95     .instance_init  = vhost_user_blk_pci_instance_init,
  96     .class_init     = vhost_user_blk_pci_class_init,
  97 };
  98
  99 static void vhost_user_blk_pci_register(void)
 100 {
 101     virtio_pci_types_register(&vhost_user_blk_pci_info);
 102 }
 103
 104 type_init(vhost_user_blk_pci_register)