1 /* 2 * libqos driver framework 3 * 4 * Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com> 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License version 2.1 as published by the Free Software Foundation. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Lesser General Public License for more details. 14 * 15 * You should have received a copy of the GNU Lesser General Public 16 * License along with this library; if not, see <http://www.gnu.org/licenses/> 17 */ 18 19 #include "qemu/osdep.h" 20 #include "libqtest.h" 21 #include "qemu/module.h" 22 #include "standard-headers/linux/virtio_ids.h" 23 #include "libqos/qgraph.h" 24 #include "libqos/virtio-scsi.h" 25 26 /* virtio-scsi-device */ 27 static void *qvirtio_scsi_get_driver(QVirtioSCSI *v_scsi, 28 const char *interface) 29 { 30 if (!g_strcmp0(interface, "virtio-scsi")) { 31 return v_scsi; 32 } 33 if (!g_strcmp0(interface, "virtio")) { 34 return v_scsi->vdev; 35 } 36 37 fprintf(stderr, "%s not present in virtio-scsi-device\n", interface); 38 g_assert_not_reached(); 39 } 40 41 static void *qvirtio_scsi_device_get_driver(void *object, 42 const char *interface) 43 { 44 QVirtioSCSIDevice *v_scsi = object; 45 return qvirtio_scsi_get_driver(&v_scsi->scsi, interface); 46 } 47 48 static void *virtio_scsi_device_create(void *virtio_dev, 49 QGuestAllocator *t_alloc, 50 void *addr) 51 { 52 QVirtioSCSIDevice *virtio_bdevice = g_new0(QVirtioSCSIDevice, 1); 53 QVirtioSCSI *interface = &virtio_bdevice->scsi; 54 55 interface->vdev = virtio_dev; 56 57 virtio_bdevice->obj.get_driver = qvirtio_scsi_device_get_driver; 58 59 return &virtio_bdevice->obj; 60 } 61 62 /* virtio-scsi-pci */ 63 static void *qvirtio_scsi_pci_get_driver(void *object, 64 const char *interface) 65 { 66 QVirtioSCSIPCI *v_scsi = object; 67 if (!g_strcmp0(interface, "pci-device")) { 68 return v_scsi->pci_vdev.pdev; 69 } 70 return qvirtio_scsi_get_driver(&v_scsi->scsi, interface); 71 } 72 73 static void *virtio_scsi_pci_create(void *pci_bus, 74 QGuestAllocator *t_alloc, 75 void *addr) 76 { 77 QVirtioSCSIPCI *virtio_spci = g_new0(QVirtioSCSIPCI, 1); 78 QVirtioSCSI *interface = &virtio_spci->scsi; 79 QOSGraphObject *obj = &virtio_spci->pci_vdev.obj; 80 81 virtio_pci_init(&virtio_spci->pci_vdev, pci_bus, addr); 82 interface->vdev = &virtio_spci->pci_vdev.vdev; 83 84 g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_SCSI); 85 86 obj->get_driver = qvirtio_scsi_pci_get_driver; 87 88 return obj; 89 } 90 91 static void virtio_scsi_register_nodes(void) 92 { 93 QPCIAddress addr = { 94 .devfn = QPCI_DEVFN(4, 0), 95 }; 96 97 QOSGraphEdgeOptions opts = { 98 .before_cmd_line = "-drive id=drv0,if=none,file=null-co://," 99 "file.read-zeroes=on,format=raw", 100 .after_cmd_line = "-device scsi-hd,bus=vs0.0,drive=drv0", 101 }; 102 103 /* virtio-scsi-device */ 104 opts.extra_device_opts = "id=vs0"; 105 qos_node_create_driver("virtio-scsi-device", 106 virtio_scsi_device_create); 107 qos_node_consumes("virtio-scsi-device", "virtio-bus", &opts); 108 qos_node_produces("virtio-scsi-device", "virtio-scsi"); 109 110 /* virtio-scsi-pci */ 111 opts.extra_device_opts = "id=vs0,addr=04.0"; 112 add_qpci_address(&opts, &addr); 113 qos_node_create_driver("virtio-scsi-pci", virtio_scsi_pci_create); 114 qos_node_consumes("virtio-scsi-pci", "pci-bus", &opts); 115 qos_node_produces("virtio-scsi-pci", "pci-device"); 116 qos_node_produces("virtio-scsi-pci", "virtio-scsi"); 117 } 118 119 libqos_init(virtio_scsi_register_nodes); 120