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 "virtio-pci.h"
  28
  29 typedef struct VHostUserBlkPCI VHostUserBlkPCI;
  30
  31 /*
  32  * vhost-user-blk-pci: This extends VirtioPCIProxy.
  33  */
  34 #define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci-base"
  35 #define VHOST_USER_BLK_PCI(obj) \
  36         OBJECT_CHECK(VHostUserBlkPCI, (obj), TYPE_VHOST_USER_BLK_PCI)
  37
  38 struct VHostUserBlkPCI {
  39     VirtIOPCIProxy parent_obj;
  40     VHostUserBlk vdev;
  41 };
  42
  43 static Property vhost_user_blk_pci_properties[] = {
  44     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
  45     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  46                        DEV_NVECTORS_UNSPECIFIED),
  47     DEFINE_PROP_END_OF_LIST(),
  48 };
  49
  50 static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  51 {
  52     VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev);
  53     DeviceState *vdev = DEVICE(&dev->vdev);
  54
  55     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  56         vpci_dev->nvectors = dev->vdev.num_queues + 1;
  57     }
  58
  59     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
  60     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
  61 }
  62
  63 static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data)
  64 {
  65     DeviceClass *dc = DEVICE_CLASS(klass);
  66     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  67     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  68
  69     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  70     dc->props = vhost_user_blk_pci_properties;
  71     k->realize = vhost_user_blk_pci_realize;
  72     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  73     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
  74     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  75     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  76 }
  77
  78 static void vhost_user_blk_pci_instance_init(Object *obj)
  79 {
  80     VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj);
  81
  82     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  83                                 TYPE_VHOST_USER_BLK);
  84     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  85                               "bootindex", &error_abort);
  86 }
  87
  88 static const VirtioPCIDeviceTypeInfo vhost_user_blk_pci_info = {
  89     .base_name               = TYPE_VHOST_USER_BLK_PCI,
  90     .generic_name            = "vhost-user-blk-pci",
  91     .transitional_name       = "vhost-user-blk-pci-transitional",
  92     .non_transitional_name   = "vhost-user-blk-pci-non-transitional",
  93     .instance_size  = sizeof(VHostUserBlkPCI),
  94     .instance_init  = vhost_user_blk_pci_instance_init,
  95     .class_init     = vhost_user_blk_pci_class_init,
  96 };
  97
  98 static void vhost_user_blk_pci_register(void)
  99 {
 100     virtio_pci_types_register(&vhost_user_blk_pci_info);
 101 }
 102
 103 type_init(vhost_user_blk_pci_register)