hw/virtio/virtio-blk-pci.c

   1 /*
   2  * Virtio blk PCI Bindings
   3  *
   4  * Copyright IBM, Corp. 2007
   5  * Copyright (c) 2009 CodeSourcery
   6  *
   7  * Authors:
   8  *  Anthony Liguori   <aliguori@us.ibm.com>
   9  *  Paul Brook        <paul@codesourcery.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2.  See
  12  * the COPYING file in the top-level directory.
  13  *
  14  * Contributions after 2012-01-13 are licensed under the terms of the
  15  * GNU GPL, version 2 or (at your option) any later version.
  16  */
  17
  18 #include "qemu/osdep.h"
  19
  20 #include "hw/qdev-properties.h"
  21 #include "hw/virtio/virtio-blk.h"
  22 #include "virtio-pci.h"
  23 #include "qapi/error.h"
  24 #include "qemu/module.h"
  25 #include "qom/object.h"
  26
  27 typedef struct VirtIOBlkPCI VirtIOBlkPCI;
  28
  29 /*
  30  * virtio-blk-pci: This extends VirtioPCIProxy.
  31  */
  32 #define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci-base"
  33 DECLARE_INSTANCE_CHECKER(VirtIOBlkPCI, VIRTIO_BLK_PCI,
  34                          TYPE_VIRTIO_BLK_PCI)
  35
  36 struct VirtIOBlkPCI {
  37     VirtIOPCIProxy parent_obj;
  38     VirtIOBlock vdev;
  39 };
  40
  41 static Property virtio_blk_pci_properties[] = {
  42     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
  43     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
  44                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
  45     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  46                        DEV_NVECTORS_UNSPECIFIED),
  47     DEFINE_PROP_END_OF_LIST(),
  48 };
  49
  50 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  51 {
  52     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
  53     DeviceState *vdev = DEVICE(&dev->vdev);
  54     VirtIOBlkConf *conf = &dev->vdev.conf;
  55
  56     if (conf->num_queues == VIRTIO_BLK_AUTO_NUM_QUEUES) {
  57         conf->num_queues = virtio_pci_optimal_num_queues(0);
  58     }
  59
  60     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  61         vpci_dev->nvectors = conf->num_queues + 1;
  62     }
  63
  64     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  65 }
  66
  67 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
  68 {
  69     DeviceClass *dc = DEVICE_CLASS(klass);
  70     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  71     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  72
  73     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  74     device_class_set_props(dc, virtio_blk_pci_properties);
  75     k->realize = virtio_blk_pci_realize;
  76     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  77     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
  78     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  79     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  80 }
  81
  82 static void virtio_blk_pci_instance_init(Object *obj)
  83 {
  84     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
  85
  86     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  87                                 TYPE_VIRTIO_BLK);
  88     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  89                               "bootindex");
  90 }
  91
  92 static const VirtioPCIDeviceTypeInfo virtio_blk_pci_info = {
  93     .base_name              = TYPE_VIRTIO_BLK_PCI,
  94     .generic_name           = "virtio-blk-pci",
  95     .transitional_name      = "virtio-blk-pci-transitional",
  96     .non_transitional_name  = "virtio-blk-pci-non-transitional",
  97     .instance_size = sizeof(VirtIOBlkPCI),
  98     .instance_init = virtio_blk_pci_instance_init,
  99     .class_init    = virtio_blk_pci_class_init,
 100 };
 101
 102 static void virtio_blk_pci_register(void)
 103 {
 104     virtio_pci_types_register(&virtio_blk_pci_info);
 105 }
 106
 107 type_init(virtio_blk_pci_register)