1 /* 2 * libqos driver virtio-iommu-pci framework 3 * 4 * Copyright (c) 2021 Red Hat, Inc. 5 * 6 * Authors: 7 * Eric Auger <eric.auger@redhat.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or (at your 10 * option) any later version. See the COPYING file in the top-level directory. 11 * 12 */ 13 14 #include "qemu/osdep.h" 15 #include "../libqtest.h" 16 #include "qemu/module.h" 17 #include "qgraph.h" 18 #include "virtio-iommu.h" 19 #include "hw/virtio/virtio-iommu.h" 20 21 static QGuestAllocator *alloc; 22 23 /* virtio-iommu-device */ 24 static void *qvirtio_iommu_get_driver(QVirtioIOMMU *v_iommu, 25 const char *interface) 26 { 27 if (!g_strcmp0(interface, "virtio-iommu")) { 28 return v_iommu; 29 } 30 if (!g_strcmp0(interface, "virtio")) { 31 return v_iommu->vdev; 32 } 33 34 fprintf(stderr, "%s not present in virtio-iommu-device\n", interface); 35 g_assert_not_reached(); 36 } 37 38 static void virtio_iommu_cleanup(QVirtioIOMMU *interface) 39 { 40 qvirtqueue_cleanup(interface->vdev->bus, interface->vq, alloc); 41 } 42 43 static void virtio_iommu_setup(QVirtioIOMMU *interface) 44 { 45 QVirtioDevice *vdev = interface->vdev; 46 uint64_t features; 47 48 features = qvirtio_get_features(vdev); 49 features &= ~(QVIRTIO_F_BAD_FEATURE | 50 (1ull << VIRTIO_RING_F_INDIRECT_DESC) | 51 (1ull << VIRTIO_RING_F_EVENT_IDX) | 52 (1ull << VIRTIO_IOMMU_F_BYPASS)); 53 qvirtio_set_features(vdev, features); 54 interface->vq = qvirtqueue_setup(interface->vdev, alloc, 0); 55 qvirtio_set_driver_ok(interface->vdev); 56 } 57 58 /* virtio-iommu-pci */ 59 static void *qvirtio_iommu_pci_get_driver(void *object, const char *interface) 60 { 61 QVirtioIOMMUPCI *v_iommu = object; 62 if (!g_strcmp0(interface, "pci-device")) { 63 return v_iommu->pci_vdev.pdev; 64 } 65 return qvirtio_iommu_get_driver(&v_iommu->iommu, interface); 66 } 67 68 static void qvirtio_iommu_pci_destructor(QOSGraphObject *obj) 69 { 70 QVirtioIOMMUPCI *iommu_pci = (QVirtioIOMMUPCI *) obj; 71 QVirtioIOMMU *interface = &iommu_pci->iommu; 72 QOSGraphObject *pci_vobj = &iommu_pci->pci_vdev.obj; 73 74 virtio_iommu_cleanup(interface); 75 qvirtio_pci_destructor(pci_vobj); 76 } 77 78 static void qvirtio_iommu_pci_start_hw(QOSGraphObject *obj) 79 { 80 QVirtioIOMMUPCI *iommu_pci = (QVirtioIOMMUPCI *) obj; 81 QVirtioIOMMU *interface = &iommu_pci->iommu; 82 QOSGraphObject *pci_vobj = &iommu_pci->pci_vdev.obj; 83 84 qvirtio_pci_start_hw(pci_vobj); 85 virtio_iommu_setup(interface); 86 } 87 88 89 static void *virtio_iommu_pci_create(void *pci_bus, QGuestAllocator *t_alloc, 90 void *addr) 91 { 92 QVirtioIOMMUPCI *virtio_rpci = g_new0(QVirtioIOMMUPCI, 1); 93 QVirtioIOMMU *interface = &virtio_rpci->iommu; 94 QOSGraphObject *obj = &virtio_rpci->pci_vdev.obj; 95 96 virtio_pci_init(&virtio_rpci->pci_vdev, pci_bus, addr); 97 interface->vdev = &virtio_rpci->pci_vdev.vdev; 98 alloc = t_alloc; 99 100 obj->get_driver = qvirtio_iommu_pci_get_driver; 101 obj->start_hw = qvirtio_iommu_pci_start_hw; 102 obj->destructor = qvirtio_iommu_pci_destructor; 103 104 return obj; 105 } 106 107 static void virtio_iommu_register_nodes(void) 108 { 109 QPCIAddress addr = { 110 .devfn = QPCI_DEVFN(4, 0), 111 }; 112 113 QOSGraphEdgeOptions opts = { 114 .extra_device_opts = "addr=04.0", 115 }; 116 117 /* virtio-iommu-pci */ 118 add_qpci_address(&opts, &addr); 119 qos_node_create_driver("virtio-iommu-pci", virtio_iommu_pci_create); 120 qos_node_consumes("virtio-iommu-pci", "pci-bus", &opts); 121 qos_node_produces("virtio-iommu-pci", "pci-device"); 122 qos_node_produces("virtio-iommu-pci", "virtio"); 123 qos_node_produces("virtio-iommu-pci", "virtio-iommu"); 124 } 125 126 libqos_init(virtio_iommu_register_nodes); 127