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 const 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 }; 43 44 static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 45 { 46 VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev); 47 PCIBus *pbus = pci_get_bus(&vpci_dev->pci_dev); 48 DeviceState *vdev = DEVICE(&dev->vdev); 49 VirtIOIOMMU *s = VIRTIO_IOMMU(vdev); 50 51 if (!qdev_get_machine_hotplug_handler(DEVICE(vpci_dev))) { 52 error_setg(errp, "Check your machine implements a hotplug handler " 53 "for the virtio-iommu-pci device"); 54 return; 55 } 56 for (int i = 0; i < s->nr_prop_resv_regions; i++) { 57 if (s->prop_resv_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_RESERVED && 58 s->prop_resv_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_MSI) { 59 error_setg(errp, "reserved region %d has an invalid type", i); 60 error_append_hint(errp, "Valid values are 0 and 1\n"); 61 return; 62 } 63 } 64 if (!pci_bus_is_root(pbus)) { 65 error_setg(errp, "virtio-iommu-pci must be plugged on the root bus"); 66 return; 67 } 68 69 object_property_set_link(OBJECT(dev), "primary-bus", 70 OBJECT(pbus), &error_abort); 71 72 virtio_pci_force_virtio_1(vpci_dev); 73 qdev_realize(vdev, BUS(&vpci_dev->bus), errp); 74 } 75 76 static void virtio_iommu_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 k->realize = virtio_iommu_pci_realize; 82 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 83 device_class_set_props(dc, virtio_iommu_pci_properties); 84 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 85 pcidev_k->class_id = PCI_CLASS_OTHERS; 86 dc->hotpluggable = false; 87 } 88 89 static void virtio_iommu_pci_instance_init(Object *obj) 90 { 91 VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(obj); 92 93 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 94 TYPE_VIRTIO_IOMMU); 95 } 96 97 static void virtio_iommu_pci_instance_finalize(Object *obj) 98 { 99 VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(obj); 100 101 g_free(dev->vdev.prop_resv_regions); 102 } 103 104 static const VirtioPCIDeviceTypeInfo virtio_iommu_pci_info = { 105 .generic_name = TYPE_VIRTIO_IOMMU_PCI, 106 .instance_size = sizeof(VirtIOIOMMUPCI), 107 .instance_init = virtio_iommu_pci_instance_init, 108 .instance_finalize = virtio_iommu_pci_instance_finalize, 109 .class_init = virtio_iommu_pci_class_init, 110 }; 111 112 static void virtio_iommu_pci_register(void) 113 { 114 virtio_pci_types_register(&virtio_iommu_pci_info); 115 } 116 117 type_init(virtio_iommu_pci_register) 118 119 120