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vhost-user-scsi-pci.c (3612B)

      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 "hw/virtio/virtio-pci.h"
     34 #include "qom/object.h"
     35 
     36 typedef struct VHostUserSCSIPCI VHostUserSCSIPCI;
     37 
     38 #define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci-base"
     39 DECLARE_INSTANCE_CHECKER(VHostUserSCSIPCI, VHOST_USER_SCSI_PCI,
     40                          TYPE_VHOST_USER_SCSI_PCI)
     41 
     42 struct VHostUserSCSIPCI {
     43     VirtIOPCIProxy parent_obj;
     44     VHostUserSCSI vdev;
     45 };
     46 
     47 static Property vhost_user_scsi_pci_properties[] = {
     48     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
     49                        DEV_NVECTORS_UNSPECIFIED),
     50     DEFINE_PROP_END_OF_LIST(),
     51 };
     52 
     53 static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     54 {
     55     VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev);
     56     DeviceState *vdev = DEVICE(&dev->vdev);
     57     VirtIOSCSIConf *conf = &dev->vdev.parent_obj.parent_obj.conf;
     58 
     59     if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) {
     60         conf->num_queues =
     61             virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED);
     62     }
     63 
     64     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
     65         vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1;
     66     }
     67 
     68     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
     69 }
     70 
     71 static void vhost_user_scsi_pci_class_init(ObjectClass *klass, void *data)
     72 {
     73     DeviceClass *dc = DEVICE_CLASS(klass);
     74     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
     75     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
     76     k->realize = vhost_user_scsi_pci_realize;
     77     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
     78     device_class_set_props(dc, vhost_user_scsi_pci_properties);
     79     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
     80     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
     81     pcidev_k->revision = 0x00;
     82     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
     83 }
     84 
     85 static void vhost_user_scsi_pci_instance_init(Object *obj)
     86 {
     87     VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj);
     88 
     89     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
     90                                 TYPE_VHOST_USER_SCSI);
     91     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
     92                               "bootindex");
     93 }
     94 
     95 static const VirtioPCIDeviceTypeInfo vhost_user_scsi_pci_info = {
     96     .base_name             = TYPE_VHOST_USER_SCSI_PCI,
     97     .generic_name          = "vhost-user-scsi-pci",
     98     .transitional_name     = "vhost-user-scsi-pci-transitional",
     99     .non_transitional_name = "vhost-user-scsi-pci-non-transitional",
    100     .instance_size = sizeof(VHostUserSCSIPCI),
    101     .instance_init = vhost_user_scsi_pci_instance_init,
    102     .class_init    = vhost_user_scsi_pci_class_init,
    103 };
    104 
    105 static void vhost_user_scsi_pci_register(void)
    106 {
    107     virtio_pci_types_register(&vhost_user_scsi_pci_info);
    108 }
    109 
    110 type_init(vhost_user_scsi_pci_register)