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 20 typedef struct VirtIOIOMMUPCI VirtIOIOMMUPCI; 21 22 /* 23 * virtio-iommu-pci: This extends VirtioPCIProxy. 24 * 25 */ 26 #define VIRTIO_IOMMU_PCI(obj) \ 27 OBJECT_CHECK(VirtIOIOMMUPCI, (obj), TYPE_VIRTIO_IOMMU_PCI) 28 29 struct VirtIOIOMMUPCI { 30 VirtIOPCIProxy parent_obj; 31 VirtIOIOMMU vdev; 32 }; 33 34 static Property virtio_iommu_pci_properties[] = { 35 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), 36 DEFINE_PROP_ARRAY("reserved-regions", VirtIOIOMMUPCI, 37 vdev.nb_reserved_regions, vdev.reserved_regions, 38 qdev_prop_reserved_region, ReservedRegion), 39 DEFINE_PROP_END_OF_LIST(), 40 }; 41 42 static void virtio_iommu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 43 { 44 VirtIOIOMMUPCI *dev = VIRTIO_IOMMU_PCI(vpci_dev); 45 DeviceState *vdev = DEVICE(&dev->vdev); 46 VirtIOIOMMU *s = VIRTIO_IOMMU(vdev); 47 48 if (!qdev_get_machine_hotplug_handler(DEVICE(vpci_dev))) { 49 MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine()); 50 51 error_setg(errp, 52 "%s machine fails to create iommu-map device tree bindings", 53 mc->name); 54 error_append_hint(errp, 55 "Check your machine implements a hotplug handler " 56 "for the virtio-iommu-pci device\n"); 57 error_append_hint(errp, "Check the guest is booted without FW or with " 58 "-no-acpi\n"); 59 return; 60 } 61 for (int i = 0; i < s->nb_reserved_regions; i++) { 62 if (s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_RESERVED && 63 s->reserved_regions[i].type != VIRTIO_IOMMU_RESV_MEM_T_MSI) { 64 error_setg(errp, "reserved region %d has an invalid type", i); 65 error_append_hint(errp, "Valid values are 0 and 1\n"); 66 } 67 } 68 object_property_set_link(OBJECT(dev), 69 OBJECT(pci_get_bus(&vpci_dev->pci_dev)), 70 "primary-bus", &error_abort); 71 qdev_realize(vdev, BUS(&vpci_dev->bus), errp); 72 } 73 74 static void virtio_iommu_pci_class_init(ObjectClass *klass, void *data) 75 { 76 DeviceClass *dc = DEVICE_CLASS(klass); 77 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 78 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 79 k->realize = virtio_iommu_pci_realize; 80 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 81 device_class_set_props(dc, virtio_iommu_pci_properties); 82 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; 83 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_IOMMU; 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 const VirtioPCIDeviceTypeInfo virtio_iommu_pci_info = { 98 .base_name = TYPE_VIRTIO_IOMMU_PCI, 99 .generic_name = "virtio-iommu-pci", 100 .transitional_name = "virtio-iommu-pci-transitional", 101 .non_transitional_name = "virtio-iommu-pci-non-transitional", 102 .instance_size = sizeof(VirtIOIOMMUPCI), 103 .instance_init = virtio_iommu_pci_instance_init, 104 .class_init = virtio_iommu_pci_class_init, 105 }; 106 107 static void virtio_iommu_pci_register(void) 108 { 109 virtio_pci_types_register(&virtio_iommu_pci_info); 110 } 111 112 type_init(virtio_iommu_pci_register) 113 114 115