@samitouri / QOSamiQemu
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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 "qgraph.h"
24 #include "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);