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 "qapi/error.h" 26 #include "qemu/error-report.h" 27 #include "virtio-pci.h" 28 29 typedef struct VHostUserBlkPCI VHostUserBlkPCI; 30 31 /* 32 * vhost-user-blk-pci: This extends VirtioPCIProxy. 33 */ 34 #define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci-base" 35 #define VHOST_USER_BLK_PCI(obj) \ 36 OBJECT_CHECK(VHostUserBlkPCI, (obj), TYPE_VHOST_USER_BLK_PCI) 37 38 struct VHostUserBlkPCI { 39 VirtIOPCIProxy parent_obj; 40 VHostUserBlk vdev; 41 }; 42 43 static Property vhost_user_blk_pci_properties[] = { 44 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 45 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 46 DEV_NVECTORS_UNSPECIFIED), 47 DEFINE_PROP_END_OF_LIST(), 48 }; 49 50 static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 51 { 52 VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev); 53 DeviceState *vdev = DEVICE(&dev->vdev); 54 55 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 56 vpci_dev->nvectors = dev->vdev.num_queues + 1; 57 } 58 59 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 60 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 61 } 62 63 static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data) 64 { 65 DeviceClass *dc = DEVICE_CLASS(klass); 66 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 67 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 68 69 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 70 dc->props = vhost_user_blk_pci_properties; 71 k->realize = vhost_user_blk_pci_realize; 72 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 73 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; 74 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 75 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 76 } 77 78 static void vhost_user_blk_pci_instance_init(Object *obj) 79 { 80 VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj); 81 82 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 83 TYPE_VHOST_USER_BLK); 84 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 85 "bootindex", &error_abort); 86 } 87 88 static const VirtioPCIDeviceTypeInfo vhost_user_blk_pci_info = { 89 .base_name = TYPE_VHOST_USER_BLK_PCI, 90 .generic_name = "vhost-user-blk-pci", 91 .transitional_name = "vhost-user-blk-pci-transitional", 92 .non_transitional_name = "vhost-user-blk-pci-non-transitional", 93 .instance_size = sizeof(VHostUserBlkPCI), 94 .instance_init = vhost_user_blk_pci_instance_init, 95 .class_init = vhost_user_blk_pci_class_init, 96 }; 97 98 static void vhost_user_blk_pci_register(void) 99 { 100 virtio_pci_types_register(&vhost_user_blk_pci_info); 101 } 102 103 type_init(vhost_user_blk_pci_register) 104