1 /* 2 * Vhost user blk PCI Bindings 3 * 4 * Copyright(C) 2017 Intel Corporation. 5 * 6 * Authors: 7 * Changpeng Liu <changpeng.liu@intel.com> 8 * 9 * Largely based on the "vhost-user-scsi.c" and "vhost-scsi.c" implemented by: 10 * Felipe Franciosi <felipe@nutanix.com> 11 * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> 12 * Nicholas Bellinger <nab@risingtidesystems.com> 13 * 14 * This work is licensed under the terms of the GNU LGPL, version 2 or later. 15 * See the COPYING.LIB file in the top-level directory. 16 * 17 */ 18 19 #include "qemu/osdep.h" 20 21 #include "standard-headers/linux/virtio_pci.h" 22 #include "hw/virtio/virtio.h" 23 #include "hw/virtio/vhost-user-blk.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 "virtio-pci.h" 30 31 typedef struct VHostUserBlkPCI VHostUserBlkPCI; 32 33 /* 34 * vhost-user-blk-pci: This extends VirtioPCIProxy. 35 */ 36 #define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci-base" 37 #define VHOST_USER_BLK_PCI(obj) \ 38 OBJECT_CHECK(VHostUserBlkPCI, (obj), TYPE_VHOST_USER_BLK_PCI) 39 40 struct VHostUserBlkPCI { 41 VirtIOPCIProxy parent_obj; 42 VHostUserBlk vdev; 43 }; 44 45 static Property vhost_user_blk_pci_properties[] = { 46 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 47 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 48 DEV_NVECTORS_UNSPECIFIED), 49 DEFINE_PROP_END_OF_LIST(), 50 }; 51 52 static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 53 { 54 VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev); 55 DeviceState *vdev = DEVICE(&dev->vdev); 56 57 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 58 vpci_dev->nvectors = dev->vdev.num_queues + 1; 59 } 60 61 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 62 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 63 } 64 65 static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data) 66 { 67 DeviceClass *dc = DEVICE_CLASS(klass); 68 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 69 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 70 71 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 72 dc->props = vhost_user_blk_pci_properties; 73 k->realize = vhost_user_blk_pci_realize; 74 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 75 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; 76 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 77 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 78 } 79 80 static void vhost_user_blk_pci_instance_init(Object *obj) 81 { 82 VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj); 83 84 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 85 TYPE_VHOST_USER_BLK); 86 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 87 "bootindex", &error_abort); 88 } 89 90 static const VirtioPCIDeviceTypeInfo vhost_user_blk_pci_info = { 91 .base_name = TYPE_VHOST_USER_BLK_PCI, 92 .generic_name = "vhost-user-blk-pci", 93 .transitional_name = "vhost-user-blk-pci-transitional", 94 .non_transitional_name = "vhost-user-blk-pci-non-transitional", 95 .instance_size = sizeof(VHostUserBlkPCI), 96 .instance_init = vhost_user_blk_pci_instance_init, 97 .class_init = vhost_user_blk_pci_class_init, 98 }; 99 100 static void vhost_user_blk_pci_register(void) 101 { 102 virtio_pci_types_register(&vhost_user_blk_pci_info); 103 } 104 105 type_init(vhost_user_blk_pci_register) 106