a371349303
Add qgraph nodes for virtio-blk-pci and virtio-blk-device. Both nodes produce virtio-blk, but virtio-blk-pci receives a pci-bus and uses virtio-pci QOSGraphObject and functions, while virtio-blk-device receives a virtio and implements its own functions Signed-off-by: Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
/*
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* libqos driver framework
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*
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* Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2 as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>
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*/
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#include "qemu/osdep.h"
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#include "libqtest.h"
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#include "standard-headers/linux/virtio_blk.h"
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#include "libqos/qgraph.h"
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#include "libqos/virtio-blk.h"
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#define PCI_SLOT 0x04
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#define PCI_FN 0x00
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/* virtio-blk-device */
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static void *qvirtio_blk_get_driver(QVirtioBlk *v_blk,
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const char *interface)
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{
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if (!g_strcmp0(interface, "virtio-blk")) {
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return v_blk;
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}
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if (!g_strcmp0(interface, "virtio")) {
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return v_blk->vdev;
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}
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fprintf(stderr, "%s not present in virtio-blk-device\n", interface);
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g_assert_not_reached();
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}
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static void *qvirtio_blk_device_get_driver(void *object,
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const char *interface)
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{
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QVirtioBlkDevice *v_blk = object;
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return qvirtio_blk_get_driver(&v_blk->blk, interface);
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}
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static void *virtio_blk_device_create(void *virtio_dev,
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QGuestAllocator *t_alloc,
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void *addr)
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{
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QVirtioBlkDevice *virtio_blk = g_new0(QVirtioBlkDevice, 1);
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QVirtioBlk *interface = &virtio_blk->blk;
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interface->vdev = virtio_dev;
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virtio_blk->obj.get_driver = qvirtio_blk_device_get_driver;
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return &virtio_blk->obj;
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}
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/* virtio-blk-pci */
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static void *qvirtio_blk_pci_get_driver(void *object, const char *interface)
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{
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QVirtioBlkPCI *v_blk = object;
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if (!g_strcmp0(interface, "pci-device")) {
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return v_blk->pci_vdev.pdev;
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}
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return qvirtio_blk_get_driver(&v_blk->blk, interface);
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}
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static void *virtio_blk_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
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void *addr)
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{
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QVirtioBlkPCI *virtio_blk = g_new0(QVirtioBlkPCI, 1);
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QVirtioBlk *interface = &virtio_blk->blk;
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QOSGraphObject *obj = &virtio_blk->pci_vdev.obj;
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virtio_pci_init(&virtio_blk->pci_vdev, pci_bus, addr);
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interface->vdev = &virtio_blk->pci_vdev.vdev;
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g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_BLOCK);
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obj->get_driver = qvirtio_blk_pci_get_driver;
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return obj;
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}
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static void virtio_blk_register_nodes(void)
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{
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/* FIXME: every test using these two nodes needs to setup a
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* -drive,id=drive0 otherwise QEMU is not going to start.
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* Therefore, we do not include "produces" edge for virtio
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* and pci-device yet.
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*/
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char *arg = g_strdup_printf("id=drv0,drive=drive0,addr=%x.%x",
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PCI_SLOT, PCI_FN);
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QPCIAddress addr = {
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.devfn = QPCI_DEVFN(PCI_SLOT, PCI_FN),
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};
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QOSGraphEdgeOptions opts = { };
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/* virtio-blk-device */
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opts.extra_device_opts = "drive=drive0";
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qos_node_create_driver("virtio-blk-device", virtio_blk_device_create);
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qos_node_consumes("virtio-blk-device", "virtio-bus", &opts);
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qos_node_produces("virtio-blk-device", "virtio-blk");
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/* virtio-blk-pci */
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opts.extra_device_opts = arg;
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add_qpci_address(&opts, &addr);
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qos_node_create_driver("virtio-blk-pci", virtio_blk_pci_create);
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qos_node_consumes("virtio-blk-pci", "pci-bus", &opts);
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qos_node_produces("virtio-blk-pci", "virtio-blk");
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g_free(arg);
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}
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libqos_init(virtio_blk_register_nodes);
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