1 /* 2 * Vhost scsi PCI bindings 3 * 4 * Copyright IBM, Corp. 2011 5 * 6 * Authors: 7 * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> 8 * 9 * Changes for QEMU mainline + tcm_vhost kernel upstream: 10 * Nicholas Bellinger <nab@risingtidesystems.com> 11 * 12 * This work is licensed under the terms of the GNU LGPL, version 2 or later. 13 * See the COPYING.LIB file in the top-level directory. 14 * 15 */ 16 17 #include "qemu/osdep.h" 18 19 #include "standard-headers/linux/virtio_pci.h" 20 #include "hw/qdev-properties.h" 21 #include "hw/virtio/vhost-scsi.h" 22 #include "qapi/error.h" 23 #include "qemu/module.h" 24 #include "virtio-pci.h" 25 #include "qom/object.h" 26 27 typedef struct VHostSCSIPCI VHostSCSIPCI; 28 29 /* 30 * vhost-scsi-pci: This extends VirtioPCIProxy. 31 */ 32 #define TYPE_VHOST_SCSI_PCI "vhost-scsi-pci-base" 33 DECLARE_INSTANCE_CHECKER(VHostSCSIPCI, VHOST_SCSI_PCI, 34 TYPE_VHOST_SCSI_PCI) 35 36 struct VHostSCSIPCI { 37 VirtIOPCIProxy parent_obj; 38 VHostSCSI vdev; 39 }; 40 41 static Property vhost_scsi_pci_properties[] = { 42 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 43 DEV_NVECTORS_UNSPECIFIED), 44 DEFINE_PROP_END_OF_LIST(), 45 }; 46 47 static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 48 { 49 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev); 50 DeviceState *vdev = DEVICE(&dev->vdev); 51 VirtIOSCSIConf *conf = &dev->vdev.parent_obj.parent_obj.conf; 52 53 if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) { 54 conf->num_queues = 55 virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED); 56 } 57 58 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { 59 vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1; 60 } 61 62 qdev_realize(vdev, BUS(&vpci_dev->bus), errp); 63 } 64 65 static void vhost_scsi_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 k->realize = vhost_scsi_pci_realize; 71 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 72 device_class_set_props(dc, vhost_scsi_pci_properties); 73 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 74 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; 75 pcidev_k->revision = 0x00; 76 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; 77 } 78 79 static void vhost_scsi_pci_instance_init(Object *obj) 80 { 81 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj); 82 83 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 84 TYPE_VHOST_SCSI); 85 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 86 "bootindex"); 87 } 88 89 static const VirtioPCIDeviceTypeInfo vhost_scsi_pci_info = { 90 .base_name = TYPE_VHOST_SCSI_PCI, 91 .generic_name = "vhost-scsi-pci", 92 .transitional_name = "vhost-scsi-pci-transitional", 93 .non_transitional_name = "vhost-scsi-pci-non-transitional", 94 .instance_size = sizeof(VHostSCSIPCI), 95 .instance_init = vhost_scsi_pci_instance_init, 96 .class_init = vhost_scsi_pci_class_init, 97 }; 98 99 static void vhost_scsi_pci_register(void) 100 { 101 virtio_pci_types_register(&vhost_scsi_pci_info); 102 } 103 104 type_init(vhost_scsi_pci_register) 105