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 "virtio-pci.h" 15 #include "hw/virtio/virtio-iommu.h" 16 #include "hw/qdev-properties.h" 17 #include "qapi/error.h" 18 #include "hw/boards.h" 19 #include "qom/object.h" 20 21 typedef struct VirtIOIOMMUPCI VirtIOIOMMUPCI; 22 23 /* 24 * virtio-iommu-pci: This extends VirtioPCIProxy. 25 * 26 */ 27 DECLARE_INSTANCE_CHECKER(VirtIOIOMMUPCI, VIRTIO_IOMMU_PCI, 28 TYPE_VIRTIO_IOMMU_PCI) 29 30 struct VirtIOIOMMUPCI { 31 VirtIOPCIProxy parent_obj; 32 VirtIOIOMMU vdev; 33 }; 34 35 static Property virtio_iommu_pci_properties[] = { 36 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 37 DEFINE_PROP_ARRAY("reserved-regions", VirtIOIOMMUPCI, 38 vdev.nb_reserved_regions, vdev.reserved_regions, 39 qdev_prop_reserved_region, ReservedRegion), 40 DEFINE_PROP_END_OF_LIST(), 41 }; 42 43 static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 44 { 45 VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev); 46 DeviceState *vdev = DEVICE(&dev->vdev); 47 VirtIOIOMMU *s = VIRTIO_IOMMU(vdev); 48 49 if (!qdev_get_machine_hotplug_handler(DEVICE(vpci_dev))) { 50 MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine()); 51 52 error_setg(errp, 53 "%s machine fails to create iommu-map device tree bindings", 54 mc->name); 55 error_append_hint(errp, 56 "Check your machine implements a hotplug handler " 57 "for the virtio-iommu-pci device\n"); 58 error_append_hint(errp, "Check the guest is booted without FW or with " 59 "-no-acpi\n"); 60 return; 61 } 62 for (int i = 0; i < s->nb_reserved_regions; i++) { 63 if (s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_RESERVED && 64 s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_MSI) { 65 error_setg(errp, "reserved region %d has an invalid type", i); 66 error_append_hint(errp, "Valid values are 0 and 1\n"); 67 } 68 } 69 object_property_set_link(OBJECT(dev), "primary-bus", 70 OBJECT(pci_get_bus(&vpci_dev->pci_dev)), 71 &error_abort); 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->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 85 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_IOMMU; 86 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; 87 pcidev_k->class_id = PCI_CLASS_OTHERS; 88 dc->hotpluggable = false; 89 } 90 91 static void virtio_iommu_pci_instance_init(Object *obj) 92 { 93 VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(obj); 94 95 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 96 TYPE_VIRTIO_IOMMU); 97 } 98 99 static const VirtioPCIDeviceTypeInfo virtio_iommu_pci_info = { 100 .base_name = TYPE_VIRTIO_IOMMU_PCI, 101 .generic_name = "virtio-iommu-pci", 102 .non_transitional_name = "virtio-iommu-pci-non-transitional", 103 .instance_size = sizeof(VirtIOIOMMUPCI), 104 .instance_init = virtio_iommu_pci_instance_init, 105 .class_init = virtio_iommu_pci_class_init, 106 }; 107 108 static void virtio_iommu_pci_register(void) 109 { 110 virtio_pci_types_register(&virtio_iommu_pci_info); 111 } 112 113 type_init(virtio_iommu_pci_register) 114 115 116