1 /* 2 * Virtio IOMMU PCI Bindings 3 * 4 * Copyright (c) 2019 Red Hat, Inc. 5 * Written by Eric Auger 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 or 9 * (at your option) any later version. 10 */ 11 12 #include "qemu/osdep.h" 13 14 #include "hw/virtio/virtio-pci.h" 15 #include "hw/virtio/virtio-iommu.h" 16 #include "hw/qdev-properties.h" 17 #include "hw/qdev-properties-system.h" 18 #include "qapi/error.h" 19 #include "hw/boards.h" 20 #include "hw/pci/pci_bus.h" 21 #include "qom/object.h" 22 23 typedef struct VirtIOIOMMUPCI VirtIOIOMMUPCI; 24 25 /* 26 * virtio-iommu-pci: This extends VirtioPCIProxy. 27 * 28 */ 29 DECLARE_INSTANCE_CHECKER(VirtIOIOMMUPCI, VIRTIO_IOMMU_PCI, 30 TYPE_VIRTIO_IOMMU_PCI) 31 32 struct VirtIOIOMMUPCI { 33 VirtIOPCIProxy parent_obj; 34 VirtIOIOMMU vdev; 35 }; 36 37 static Property virtio_iommu_pci_properties[] = { 38 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 39 DEFINE_PROP_ARRAY("reserved-regions", VirtIOIOMMUPCI, 40 vdev.nr_prop_resv_regions, vdev.prop_resv_regions, 41 qdev_prop_reserved_region, ReservedRegion), 42 DEFINE_PROP_END_OF_LIST(), 43 }; 44 45 static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 46 { 47 VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev); 48 PCIBus *pbus = pci_get_bus(&vpci_dev->pci_dev); 49 DeviceState *vdev = DEVICE(&dev->vdev); 50 VirtIOIOMMU *s = VIRTIO_IOMMU(vdev); 51 52 if (!qdev_get_machine_hotplug_handler(DEVICE(vpci_dev))) { 53 error_setg(errp, "Check your machine implements a hotplug handler " 54 "for the virtio-iommu-pci device"); 55 return; 56 } 57 for (int i = 0; i < s->nr_prop_resv_regions; i++) { 58 if (s->prop_resv_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_RESERVED && 59 s->prop_resv_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_MSI) { 60 error_setg(errp, "reserved region %d has an invalid type", i); 61 error_append_hint(errp, "Valid values are 0 and 1\n"); 62 return; 63 } 64 } 65 if (!pci_bus_is_root(pbus)) { 66 error_setg(errp, "virtio-iommu-pci must be plugged on the root bus"); 67 return; 68 } 69 70 object_property_set_link(OBJECT(dev), "primary-bus", 71 OBJECT(pbus), &error_abort); 72 73 virtio_pci_force_virtio_1(vpci_dev); 74 qdev_realize(vdev, BUS(&vpci_dev->bus), errp); 75 } 76 77 static void virtio_iommu_pci_class_init(ObjectClass *klass, void *data) 78 { 79 DeviceClass *dc = DEVICE_CLASS(klass); 80 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 81 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 82 k->realize = virtio_iommu_pci_realize; 83 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 84 device_class_set_props(dc, virtio_iommu_pci_properties); 85 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 86 pcidev_k->class_id = PCI_CLASS_OTHERS; 87 dc->hotpluggable = false; 88 } 89 90 static void virtio_iommu_pci_instance_init(Object *obj) 91 { 92 VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(obj); 93 94 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 95 TYPE_VIRTIO_IOMMU); 96 } 97 98 static void virtio_iommu_pci_instance_finalize(Object *obj) 99 { 100 VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(obj); 101 102 g_free(dev->vdev.prop_resv_regions); 103 } 104 105 static const VirtioPCIDeviceTypeInfo virtio_iommu_pci_info = { 106 .generic_name = TYPE_VIRTIO_IOMMU_PCI, 107 .instance_size = sizeof(VirtIOIOMMUPCI), 108 .instance_init = virtio_iommu_pci_instance_init, 109 .instance_finalize = virtio_iommu_pci_instance_finalize, 110 .class_init = virtio_iommu_pci_class_init, 111 }; 112 113 static void virtio_iommu_pci_register(void) 114 { 115 virtio_pci_types_register(&virtio_iommu_pci_info); 116 } 117 118 type_init(virtio_iommu_pci_register) 119 120 121