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) 111