hw/virtio/virtio-scsi-pci.c

   1 /*
   2  * Virtio scsi 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 or
  12  * (at your option) any later version.  See the COPYING file in the
  13  * top-level directory.
  14  */
  15
  16 #include "qemu/osdep.h"
  17
  18 #include "hw/qdev-properties.h"
  19 #include "hw/virtio/virtio-scsi.h"
  20 #include "qemu/module.h"
  21 #include "virtio-pci.h"
  22 #include "qom/object.h"
  23
  24 typedef struct VirtIOSCSIPCI VirtIOSCSIPCI;
  25
  26 /*
  27  * virtio-scsi-pci: This extends VirtioPCIProxy.
  28  */
  29 #define TYPE_VIRTIO_SCSI_PCI "virtio-scsi-pci-base"
  30 DECLARE_INSTANCE_CHECKER(VirtIOSCSIPCI, VIRTIO_SCSI_PCI,
  31                          TYPE_VIRTIO_SCSI_PCI)
  32
  33 struct VirtIOSCSIPCI {
  34     VirtIOPCIProxy parent_obj;
  35     VirtIOSCSI vdev;
  36 };
  37
  38 static Property virtio_scsi_pci_properties[] = {
  39     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
  40                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
  41     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  42                        DEV_NVECTORS_UNSPECIFIED),
  43     DEFINE_PROP_END_OF_LIST(),
  44 };
  45
  46 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  47 {
  48     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
  49     DeviceState *vdev = DEVICE(&dev->vdev);
  50     DeviceState *proxy = DEVICE(vpci_dev);
  51     VirtIOSCSIConf *conf = &dev->vdev.parent_obj.conf;
  52     char *bus_name;
  53
  54     if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) {
  55         conf->num_queues =
  56             virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED);
  57     }
  58
  59     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  60         vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1;
  61     }
  62
  63     /*
  64      * For command line compatibility, this sets the virtio-scsi-device bus
  65      * name as before.
  66      */
  67     if (proxy->id) {
  68         bus_name = g_strdup_printf("%s.0", proxy->id);
  69         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
  70         g_free(bus_name);
  71     }
  72
  73     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  74 }
  75
  76 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
  77 {
  78     DeviceClass *dc = DEVICE_CLASS(klass);
  79     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  80     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  81
  82     k->realize = virtio_scsi_pci_realize;
  83     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  84     device_class_set_props(dc, virtio_scsi_pci_properties);
  85     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  86     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
  87     pcidev_k->revision = 0x00;
  88     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  89 }
  90
  91 static void virtio_scsi_pci_instance_init(Object *obj)
  92 {
  93     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
  94
  95     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  96                                 TYPE_VIRTIO_SCSI);
  97 }
  98
  99 static const VirtioPCIDeviceTypeInfo virtio_scsi_pci_info = {
 100     .base_name              = TYPE_VIRTIO_SCSI_PCI,
 101     .generic_name           = "virtio-scsi-pci",
 102     .transitional_name      = "virtio-scsi-pci-transitional",
 103     .non_transitional_name  = "virtio-scsi-pci-non-transitional",
 104     .instance_size = sizeof(VirtIOSCSIPCI),
 105     .instance_init = virtio_scsi_pci_instance_init,
 106     .class_init    = virtio_scsi_pci_class_init,
 107 };
 108
 109 static void virtio_scsi_pci_register(void)
 110 {
 111     virtio_pci_types_register(&virtio_scsi_pci_info);
 112 }
 113
 114 type_init(virtio_scsi_pci_register)