qemu

FORK: QEMU emulator
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virtio-serial.c (3764B)

      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 "qgraph.h"
     23 #include "virtio-serial.h"
     24 
     25 static void *qvirtio_serial_get_driver(QVirtioSerial *v_serial,
     26                                        const char *interface)
     27 {
     28     if (!g_strcmp0(interface, "virtio-serial")) {
     29         return v_serial;
     30     }
     31     if (!g_strcmp0(interface, "virtio")) {
     32         return v_serial->vdev;
     33     }
     34 
     35     fprintf(stderr, "%s not present in virtio-serial-device\n", interface);
     36     g_assert_not_reached();
     37 }
     38 
     39 static void *qvirtio_serial_device_get_driver(void *object,
     40                                               const char *interface)
     41 {
     42     QVirtioSerialDevice *v_serial = object;
     43     return qvirtio_serial_get_driver(&v_serial->serial, interface);
     44 }
     45 
     46 static void *virtio_serial_device_create(void *virtio_dev,
     47                                          QGuestAllocator *t_alloc,
     48                                          void *addr)
     49 {
     50     QVirtioSerialDevice *virtio_device = g_new0(QVirtioSerialDevice, 1);
     51     QVirtioSerial *interface = &virtio_device->serial;
     52 
     53     interface->vdev = virtio_dev;
     54 
     55     virtio_device->obj.get_driver = qvirtio_serial_device_get_driver;
     56 
     57     return &virtio_device->obj;
     58 }
     59 
     60 /* virtio-serial-pci */
     61 static void *qvirtio_serial_pci_get_driver(void *object, const char *interface)
     62 {
     63     QVirtioSerialPCI *v_serial = object;
     64     if (!g_strcmp0(interface, "pci-device")) {
     65         return v_serial->pci_vdev.pdev;
     66     }
     67     return qvirtio_serial_get_driver(&v_serial->serial, interface);
     68 }
     69 
     70 static void *virtio_serial_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
     71                                       void *addr)
     72 {
     73     QVirtioSerialPCI *virtio_spci = g_new0(QVirtioSerialPCI, 1);
     74     QVirtioSerial *interface = &virtio_spci->serial;
     75     QOSGraphObject *obj = &virtio_spci->pci_vdev.obj;
     76 
     77     virtio_pci_init(&virtio_spci->pci_vdev, pci_bus, addr);
     78     interface->vdev = &virtio_spci->pci_vdev.vdev;
     79 
     80     obj->get_driver = qvirtio_serial_pci_get_driver;
     81 
     82     return obj;
     83 }
     84 
     85 static void virtio_serial_register_nodes(void)
     86 {
     87    QPCIAddress addr = {
     88         .devfn = QPCI_DEVFN(4, 0),
     89     };
     90 
     91     QOSGraphEdgeOptions edge_opts = { };
     92 
     93     /* virtio-serial-device */
     94     edge_opts.extra_device_opts = "id=vser0";
     95     qos_node_create_driver("virtio-serial-device",
     96                             virtio_serial_device_create);
     97     qos_node_consumes("virtio-serial-device", "virtio-bus", &edge_opts);
     98     qos_node_produces("virtio-serial-device", "virtio");
     99     qos_node_produces("virtio-serial-device", "virtio-serial");
    100 
    101     /* virtio-serial-pci */
    102     edge_opts.extra_device_opts = "id=vser0,addr=04.0";
    103     add_qpci_address(&edge_opts, &addr);
    104     qos_node_create_driver("virtio-serial-pci", virtio_serial_pci_create);
    105     qos_node_consumes("virtio-serial-pci", "pci-bus", &edge_opts);
    106     qos_node_produces("virtio-serial-pci", "pci-device");
    107     qos_node_produces("virtio-serial-pci", "virtio");
    108     qos_node_produces("virtio-serial-pci", "virtio-serial");
    109 }
    110 
    111 libqos_init(virtio_serial_register_nodes);