1 /* 2 * Virtio scsi 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 or 12 * (at your option) any later version. See the COPYING file in the 13 * top-level directory. 14 */ 15 16 #include "qemu/osdep.h" 17 18 #include "hw/qdev-properties.h" 19 #include "hw/virtio/virtio-scsi.h" 20 #include "qemu/module.h" 21 #include "hw/virtio/virtio-pci.h" 22 #include "qom/object.h" 23 24 typedef struct VirtIOSCSIPCI VirtIOSCSIPCI; 25 26 /* 27 * virtio-scsi-pci: This extends VirtioPCIProxy. 28 */ 29 #define TYPE_VIRTIO_SCSI_PCI "virtio-scsi-pci-base" 30 DECLARE_INSTANCE_CHECKER(VirtIOSCSIPCI, VIRTIO_SCSI_PCI, 31 TYPE_VIRTIO_SCSI_PCI) 32 33 struct VirtIOSCSIPCI { 34 VirtIOPCIProxy parent_obj; 35 VirtIOSCSI vdev; 36 }; 37 38 static Property virtio_scsi_pci_properties[] = { 39 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, 40 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), 41 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 42 DEV_NVECTORS_UNSPECIFIED), 43 DEFINE_PROP_END_OF_LIST(), 44 }; 45 46 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 47 { 48 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev); 49 DeviceState *vdev = DEVICE(&dev->vdev); 50 DeviceState *proxy = DEVICE(vpci_dev); 51 VirtIOSCSIConf *conf = &dev->vdev.parent_obj.conf; 52 char *bus_name; 53 54 if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) { 55 conf->num_queues = 56 virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED); 57 } 58 59 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 60 vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1; 61 } 62 63 /* 64 * For command line compatibility, this sets the virtio-scsi-device bus 65 * name as before. 66 */ 67 if (proxy->id) { 68 bus_name = g_strdup_printf("%s.0", proxy->id); 69 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 70 g_free(bus_name); 71 } 72 73 qdev_realize(vdev, BUS(&vpci_dev->bus), errp); 74 } 75 76 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data) 77 { 78 DeviceClass *dc = DEVICE_CLASS(klass); 79 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 80 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 81 82 k->realize = virtio_scsi_pci_realize; 83 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 84 device_class_set_props(dc, virtio_scsi_pci_properties); 85 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 86 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 87 pcidev_k->revision = 0x00; 88 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 89 } 90 91 static void virtio_scsi_pci_instance_init(Object *obj) 92 { 93 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj); 94 95 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 96 TYPE_VIRTIO_SCSI); 97 } 98 99 static const VirtioPCIDeviceTypeInfo virtio_scsi_pci_info = { 100 .base_name = TYPE_VIRTIO_SCSI_PCI, 101 .generic_name = "virtio-scsi-pci", 102 .transitional_name = "virtio-scsi-pci-transitional", 103 .non_transitional_name = "virtio-scsi-pci-non-transitional", 104 .instance_size = sizeof(VirtIOSCSIPCI), 105 .instance_init = virtio_scsi_pci_instance_init, 106 .class_init = virtio_scsi_pci_class_init, 107 }; 108 109 static void virtio_scsi_pci_register(void) 110 { 111 virtio_pci_types_register(&virtio_scsi_pci_info); 112 } 113 114 type_init(virtio_scsi_pci_register) 115