1 /* 2 * Virtio blk PCI Bindings 3 * 4 * Copyright IBM, Corp. 2007 5 * Copyright (c) 2009 CodeSourcery 6 * 7 * Authors: 8 * Anthony Liguori <aliguori@us.ibm.com> 9 * Paul Brook <paul@codesourcery.com> 10 * 11 * This work is licensed under the terms of the GNU GPL, version 2. See 12 * the COPYING file in the top-level directory. 13 * 14 * Contributions after 2012-01-13 are licensed under the terms of the 15 * GNU GPL, version 2 or (at your option) any later version. 16 */ 17 18 #include "qemu/osdep.h" 19 20 #include "hw/qdev-properties.h" 21 #include "hw/virtio/virtio-blk.h" 22 #include "hw/virtio/virtio-pci.h" 23 #include "qapi/error.h" 24 #include "qemu/module.h" 25 #include "qom/object.h" 26 27 typedef struct VirtIOBlkPCI VirtIOBlkPCI; 28 29 /* 30 * virtio-blk-pci: This extends VirtioPCIProxy. 31 */ 32 #define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci-base" 33 DECLARE_INSTANCE_CHECKER(VirtIOBlkPCI, VIRTIO_BLK_PCI, 34 TYPE_VIRTIO_BLK_PCI) 35 36 struct VirtIOBlkPCI { 37 VirtIOPCIProxy parent_obj; 38 VirtIOBlock vdev; 39 }; 40 41 static Property virtio_blk_pci_properties[] = { 42 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 43 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 44 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 45 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 46 DEV_NVECTORS_UNSPECIFIED), 47 DEFINE_PROP_END_OF_LIST(), 48 }; 49 50 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 51 { 52 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev); 53 DeviceState *vdev = DEVICE(&dev->vdev); 54 VirtIOBlkConf *conf = &dev->vdev.conf; 55 56 if (conf->num_queues == VIRTIO_BLK_AUTO_NUM_QUEUES) { 57 conf->num_queues = virtio_pci_optimal_num_queues(0); 58 } 59 60 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 61 vpci_dev->nvectors = conf->num_queues + 1; 62 } 63 64 qdev_realize(vdev, BUS(&vpci_dev->bus), errp); 65 } 66 67 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data) 68 { 69 DeviceClass *dc = DEVICE_CLASS(klass); 70 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 71 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 72 73 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 74 device_class_set_props(dc, virtio_blk_pci_properties); 75 k->realize = virtio_blk_pci_realize; 76 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 77 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; 78 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 79 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 80 } 81 82 static void virtio_blk_pci_instance_init(Object *obj) 83 { 84 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj); 85 86 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 87 TYPE_VIRTIO_BLK); 88 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 89 "bootindex"); 90 } 91 92 static const VirtioPCIDeviceTypeInfo virtio_blk_pci_info = { 93 .base_name = TYPE_VIRTIO_BLK_PCI, 94 .generic_name = "virtio-blk-pci", 95 .transitional_name = "virtio-blk-pci-transitional", 96 .non_transitional_name = "virtio-blk-pci-non-transitional", 97 .instance_size = sizeof(VirtIOBlkPCI), 98 .instance_init = virtio_blk_pci_instance_init, 99 .class_init = virtio_blk_pci_class_init, 100 }; 101 102 static void virtio_blk_pci_register(void) 103 { 104 virtio_pci_types_register(&virtio_blk_pci_info); 105 } 106 107 type_init(virtio_blk_pci_register) 108