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 "qemu/module.h" 28 #include "virtio-pci.h" 29 30 typedef struct VHostUserBlkPCI VHostUserBlkPCI; 31 32 /* 33 * vhost-user-blk-pci: This extends VirtioPCIProxy. 34 */ 35 #define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci-base" 36 #define VHOST_USER_BLK_PCI(obj) \ 37 OBJECT_CHECK(VHostUserBlkPCI, (obj), TYPE_VHOST_USER_BLK_PCI) 38 39 struct VHostUserBlkPCI { 40 VirtIOPCIProxy parent_obj; 41 VHostUserBlk vdev; 42 }; 43 44 static Property vhost_user_blk_pci_properties[] = { 45 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 46 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 47 DEV_NVECTORS_UNSPECIFIED), 48 DEFINE_PROP_END_OF_LIST(), 49 }; 50 51 static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 52 { 53 VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev); 54 DeviceState *vdev = DEVICE(&dev->vdev); 55 56 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 57 vpci_dev->nvectors = dev->vdev.num_queues + 1; 58 } 59 60 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); 61 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 62 } 63 64 static void vhost_user_blk_pci_class_init(ObjectClass *klass, void *data) 65 { 66 DeviceClass *dc = DEVICE_CLASS(klass); 67 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 68 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 69 70 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 71 dc->props = vhost_user_blk_pci_properties; 72 k->realize = vhost_user_blk_pci_realize; 73 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 74 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; 75 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 76 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 77 } 78 79 static void vhost_user_blk_pci_instance_init(Object *obj) 80 { 81 VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj); 82 83 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 84 TYPE_VHOST_USER_BLK); 85 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 86 "bootindex", &error_abort); 87 } 88 89 static const VirtioPCIDeviceTypeInfo vhost_user_blk_pci_info = { 90 .base_name = TYPE_VHOST_USER_BLK_PCI, 91 .generic_name = "vhost-user-blk-pci", 92 .transitional_name = "vhost-user-blk-pci-transitional", 93 .non_transitional_name = "vhost-user-blk-pci-non-transitional", 94 .instance_size = sizeof(VHostUserBlkPCI), 95 .instance_init = vhost_user_blk_pci_instance_init, 96 .class_init = vhost_user_blk_pci_class_init, 97 }; 98 99 static void vhost_user_blk_pci_register(void) 100 { 101 virtio_pci_types_register(&vhost_user_blk_pci_info); 102 } 103 104 type_init(vhost_user_blk_pci_register) 105