qemu

FORK: QEMU emulator
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virtio-rng.c (3520B)

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