diff options
Diffstat (limited to 'hw/virtio/virtio-bus.c')
| -rw-r--r-- | hw/virtio/virtio-bus.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/hw/virtio/virtio-bus.c b/hw/virtio/virtio-bus.c new file mode 100644 index 0000000000..1596a1c92f --- /dev/null +++ b/hw/virtio/virtio-bus.c @@ -0,0 +1,164 @@ +/* + * VirtioBus + * + * Copyright (C) 2012 : GreenSocs Ltd + * http://www.greensocs.com/ , email: info@greensocs.com + * + * Developed by : + * Frederic Konrad <fred.konrad@greensocs.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ + +#include "hw/hw.h" +#include "qemu/error-report.h" +#include "hw/qdev.h" +#include "hw/virtio/virtio-bus.h" +#include "hw/virtio/virtio.h" + +/* #define DEBUG_VIRTIO_BUS */ + +#ifdef DEBUG_VIRTIO_BUS +#define DPRINTF(fmt, ...) \ +do { printf("virtio_bus: " fmt , ## __VA_ARGS__); } while (0) +#else +#define DPRINTF(fmt, ...) do { } while (0) +#endif + +/* Plug the VirtIODevice */ +int virtio_bus_plug_device(VirtIODevice *vdev) +{ + DeviceState *qdev = DEVICE(vdev); + BusState *qbus = BUS(qdev_get_parent_bus(qdev)); + VirtioBusState *bus = VIRTIO_BUS(qbus); + VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus); + DPRINTF("%s: plug device.\n", qbus->name); + + bus->vdev = vdev; + + /* + * The lines below will disappear when we drop VirtIOBindings, at the end + * of the series. + */ + bus->bindings.notify = klass->notify; + bus->bindings.save_config = klass->save_config; + bus->bindings.save_queue = klass->save_queue; + bus->bindings.load_config = klass->load_config; + bus->bindings.load_queue = klass->load_queue; + bus->bindings.load_done = klass->load_done; + bus->bindings.get_features = klass->get_features; + bus->bindings.query_guest_notifiers = klass->query_guest_notifiers; + bus->bindings.set_guest_notifiers = klass->set_guest_notifiers; + bus->bindings.set_host_notifier = klass->set_host_notifier; + bus->bindings.vmstate_change = klass->vmstate_change; + virtio_bind_device(bus->vdev, &bus->bindings, qbus->parent); + + if (klass->device_plugged != NULL) { + klass->device_plugged(qbus->parent); + } + + return 0; +} + +/* Reset the virtio_bus */ +void virtio_bus_reset(VirtioBusState *bus) +{ + DPRINTF("%s: reset device.\n", qbus->name); + if (bus->vdev != NULL) { + virtio_reset(bus->vdev); + } +} + +/* Destroy the VirtIODevice */ +void virtio_bus_destroy_device(VirtioBusState *bus) +{ + DeviceState *qdev; + BusState *qbus = BUS(bus); + VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus); + DPRINTF("%s: remove device.\n", qbus->name); + + if (bus->vdev != NULL) { + if (klass->device_unplug != NULL) { + klass->device_unplug(qbus->parent); + } + qdev = DEVICE(bus->vdev); + qdev_free(qdev); + bus->vdev = NULL; + } +} + +/* Get the device id of the plugged device. */ +uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus) +{ + assert(bus->vdev != NULL); + return bus->vdev->device_id; +} + +/* Get the config_len field of the plugged device. */ +size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus) +{ + assert(bus->vdev != NULL); + return bus->vdev->config_len; +} + +/* Get the features of the plugged device. */ +uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus, + uint32_t requested_features) +{ + VirtioDeviceClass *k; + assert(bus->vdev != NULL); + k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); + assert(k->get_features != NULL); + return k->get_features(bus->vdev, requested_features); +} + +/* Get bad features of the plugged device. */ +uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus) +{ + VirtioDeviceClass *k; + assert(bus->vdev != NULL); + k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); + if (k->bad_features != NULL) { + return k->bad_features(bus->vdev); + } else { + return 0; + } +} + +/* Get config of the plugged device. */ +void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config) +{ + VirtioDeviceClass *k; + assert(bus->vdev != NULL); + k = VIRTIO_DEVICE_GET_CLASS(bus->vdev); + if (k->get_config != NULL) { + k->get_config(bus->vdev, config); + } +} + +static const TypeInfo virtio_bus_info = { + .name = TYPE_VIRTIO_BUS, + .parent = TYPE_BUS, + .instance_size = sizeof(VirtioBusState), + .abstract = true, + .class_size = sizeof(VirtioBusClass), +}; + +static void virtio_register_types(void) +{ + type_register_static(&virtio_bus_info); +} + +type_init(virtio_register_types) |