qemu

FORK: QEMU emulator
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virtio-balloon.c (3816B)

      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-balloon.h"
     24 
     25 /* virtio-balloon-device */
     26 static void *qvirtio_balloon_get_driver(QVirtioBalloon *v_balloon,
     27                                         const char *interface)
     28 {
     29     if (!g_strcmp0(interface, "virtio-balloon")) {
     30         return v_balloon;
     31     }
     32     if (!g_strcmp0(interface, "virtio")) {
     33         return v_balloon->vdev;
     34     }
     35 
     36     fprintf(stderr, "%s not present in virtio-balloon-device\n", interface);
     37     g_assert_not_reached();
     38 }
     39 
     40 static void *qvirtio_balloon_device_get_driver(void *object,
     41                                                const char *interface)
     42 {
     43     QVirtioBalloonDevice *v_balloon = object;
     44     return qvirtio_balloon_get_driver(&v_balloon->balloon, interface);
     45 }
     46 
     47 static void *virtio_balloon_device_create(void *virtio_dev,
     48                                           QGuestAllocator *t_alloc,
     49                                           void *addr)
     50 {
     51     QVirtioBalloonDevice *virtio_bdevice = g_new0(QVirtioBalloonDevice, 1);
     52     QVirtioBalloon *interface = &virtio_bdevice->balloon;
     53 
     54     interface->vdev = virtio_dev;
     55 
     56     virtio_bdevice->obj.get_driver = qvirtio_balloon_device_get_driver;
     57 
     58     return &virtio_bdevice->obj;
     59 }
     60 
     61 /* virtio-balloon-pci */
     62 static void *qvirtio_balloon_pci_get_driver(void *object,
     63                                             const char *interface)
     64 {
     65     QVirtioBalloonPCI *v_balloon = object;
     66     if (!g_strcmp0(interface, "pci-device")) {
     67         return v_balloon->pci_vdev.pdev;
     68     }
     69     return qvirtio_balloon_get_driver(&v_balloon->balloon, interface);
     70 }
     71 
     72 static void *virtio_balloon_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
     73                                   void *addr)
     74 {
     75     QVirtioBalloonPCI *virtio_bpci = g_new0(QVirtioBalloonPCI, 1);
     76     QVirtioBalloon *interface = &virtio_bpci->balloon;
     77     QOSGraphObject *obj = &virtio_bpci->pci_vdev.obj;
     78 
     79 
     80     virtio_pci_init(&virtio_bpci->pci_vdev, pci_bus, addr);
     81     interface->vdev = &virtio_bpci->pci_vdev.vdev;
     82 
     83     obj->get_driver = qvirtio_balloon_pci_get_driver;
     84 
     85     return obj;
     86 }
     87 
     88 static void virtio_balloon_register_nodes(void)
     89 {
     90     QPCIAddress addr = {
     91         .devfn = QPCI_DEVFN(4, 0),
     92     };
     93 
     94     QOSGraphEdgeOptions opts = {
     95         .extra_device_opts = "addr=04.0",
     96     };
     97 
     98     /* virtio-balloon-device */
     99     qos_node_create_driver("virtio-balloon-device",
    100                             virtio_balloon_device_create);
    101     qos_node_consumes("virtio-balloon-device", "virtio-bus", NULL);
    102     qos_node_produces("virtio-balloon-device", "virtio");
    103     qos_node_produces("virtio-balloon-device", "virtio-balloon");
    104 
    105     /* virtio-balloon-pci */
    106     add_qpci_address(&opts, &addr);
    107     qos_node_create_driver("virtio-balloon-pci", virtio_balloon_pci_create);
    108     qos_node_consumes("virtio-balloon-pci", "pci-bus", &opts);
    109     qos_node_produces("virtio-balloon-pci", "pci-device");
    110     qos_node_produces("virtio-balloon-pci", "virtio");
    111     qos_node_produces("virtio-balloon-pci", "virtio-balloon");
    112 }
    113 
    114 libqos_init(virtio_balloon_register_nodes);