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

   1 /*
   2  * Vhost user scsi PCI Bindings
   3  *
   4  * Copyright (c) 2016 Nutanix Inc. All rights reserved.
   5  *
   6  * Author:
   7  *  Felipe Franciosi <felipe@nutanix.com>
   8  *
   9  * This work is largely based on the "vhost-scsi" implementation by:
  10  *  Stefan Hajnoczi    <stefanha@linux.vnet.ibm.com>
  11  *  Nicholas Bellinger <nab@risingtidesystems.com>
  12  *
  13  * This work is licensed under the terms of the GNU LGPL, version 2 or later.
  14  * See the COPYING.LIB file in the top-level directory.
  15  *
  16  */
  17
  18 #include "qemu/osdep.h"
  19
  20 #include "standard-headers/linux/virtio_pci.h"
  21 #include "hw/virtio/vhost-user-scsi.h"
  22 #include "hw/virtio/virtio.h"
  23 #include "hw/virtio/virtio-scsi.h"
  24 #include "hw/pci/pci.h"
  25 #include "hw/qdev-properties.h"
  26 #include "qapi/error.h"
  27 #include "qemu/error-report.h"
  28 #include "qemu/module.h"
  29 #include "hw/pci/msi.h"
  30 #include "hw/pci/msix.h"
  31 #include "hw/loader.h"
  32 #include "sysemu/kvm.h"
  33 #include "virtio-pci.h"
  34
  35 typedef struct VHostUserSCSIPCI VHostUserSCSIPCI;
  36
  37 #define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci-base"
  38 #define VHOST_USER_SCSI_PCI(obj) \
  39         OBJECT_CHECK(VHostUserSCSIPCI, (obj), TYPE_VHOST_USER_SCSI_PCI)
  40
  41 struct VHostUserSCSIPCI {
  42     VirtIOPCIProxy parent_obj;
  43     VHostUserSCSI vdev;
  44 };
  45
  46 static Property vhost_user_scsi_pci_properties[] = {
  47     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
  48                        DEV_NVECTORS_UNSPECIFIED),
  49     DEFINE_PROP_END_OF_LIST(),
  50 };
  51
  52 static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  53 {
  54     VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev);
  55     DeviceState *vdev = DEVICE(&dev->vdev);
  56     VirtIOSCSIConf *conf = &dev->vdev.parent_obj.parent_obj.conf;
  57
  58     if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) {
  59         conf->num_queues =
  60             virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED);
  61     }
  62
  63     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  64         vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1;
  65     }
  66
  67     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  68 }
  69
  70 static void vhost_user_scsi_pci_class_init(ObjectClass *klass, void *data)
  71 {
  72     DeviceClass *dc = DEVICE_CLASS(klass);
  73     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  74     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  75     k->realize = vhost_user_scsi_pci_realize;
  76     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  77     device_class_set_props(dc, vhost_user_scsi_pci_properties);
  78     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  79     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
  80     pcidev_k->revision = 0x00;
  81     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
  82 }
  83
  84 static void vhost_user_scsi_pci_instance_init(Object *obj)
  85 {
  86     VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj);
  87
  88     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  89                                 TYPE_VHOST_USER_SCSI);
  90     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
  91                               "bootindex");
  92 }
  93
  94 static const VirtioPCIDeviceTypeInfo vhost_user_scsi_pci_info = {
  95     .base_name             = TYPE_VHOST_USER_SCSI_PCI,
  96     .generic_name          = "vhost-user-scsi-pci",
  97     .transitional_name     = "vhost-user-scsi-pci-transitional",
  98     .non_transitional_name = "vhost-user-scsi-pci-non-transitional",
  99     .instance_size = sizeof(VHostUserSCSIPCI),
 100     .instance_init = vhost_user_scsi_pci_instance_init,
 101     .class_init    = vhost_user_scsi_pci_class_init,
 102 };
 103
 104 static void vhost_user_scsi_pci_register(void)
 105 {
 106     virtio_pci_types_register(&vhost_user_scsi_pci_info);
 107 }
 108
 109 type_init(vhost_user_scsi_pci_register)