diff options
Diffstat (limited to 'qemu/hw/virtio/virtio-bus.c')
| -rw-r--r-- | qemu/hw/virtio/virtio-bus.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/qemu/hw/virtio/virtio-bus.c b/qemu/hw/virtio/virtio-bus.c new file mode 100644 index 000000000..febda76b9 --- /dev/null +++ b/qemu/hw/virtio/virtio-bus.c @@ -0,0 +1,178 @@ +/* + * 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 + +/* A VirtIODevice is being plugged */ +void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp) +{ + DeviceState *qdev = DEVICE(vdev); + BusState *qbus = BUS(qdev_get_parent_bus(qdev)); + VirtioBusState *bus = VIRTIO_BUS(qbus); + VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus); + VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev); + + DPRINTF("%s: plug device.\n", qbus->name); + + if (klass->device_plugged != NULL) { + klass->device_plugged(qbus->parent, errp); + } + + /* Get the features of the plugged device. */ + assert(vdc->get_features != NULL); + vdev->host_features = vdc->get_features(vdev, vdev->host_features, + errp); +} + +/* Reset the virtio_bus */ +void virtio_bus_reset(VirtioBusState *bus) +{ + VirtIODevice *vdev = virtio_bus_get_device(bus); + + DPRINTF("%s: reset device.\n", BUS(bus)->name); + if (vdev != NULL) { + virtio_reset(vdev); + } +} + +/* A VirtIODevice is being unplugged */ +void virtio_bus_device_unplugged(VirtIODevice *vdev) +{ + DeviceState *qdev = DEVICE(vdev); + BusState *qbus = BUS(qdev_get_parent_bus(qdev)); + VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(qbus); + + DPRINTF("%s: remove device.\n", qbus->name); + + if (vdev != NULL) { + if (klass->device_unplugged != NULL) { + klass->device_unplugged(qbus->parent); + } + } +} + +/* Get the device id of the plugged device. */ +uint16_t virtio_bus_get_vdev_id(VirtioBusState *bus) +{ + VirtIODevice *vdev = virtio_bus_get_device(bus); + assert(vdev != NULL); + return vdev->device_id; +} + +/* Get the config_len field of the plugged device. */ +size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus) +{ + VirtIODevice *vdev = virtio_bus_get_device(bus); + assert(vdev != NULL); + return vdev->config_len; +} + +/* Get bad features of the plugged device. */ +uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus) +{ + VirtIODevice *vdev = virtio_bus_get_device(bus); + VirtioDeviceClass *k; + + assert(vdev != NULL); + k = VIRTIO_DEVICE_GET_CLASS(vdev); + if (k->bad_features != NULL) { + return k->bad_features(vdev); + } else { + return 0; + } +} + +/* Get config of the plugged device. */ +void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config) +{ + VirtIODevice *vdev = virtio_bus_get_device(bus); + VirtioDeviceClass *k; + + assert(vdev != NULL); + k = VIRTIO_DEVICE_GET_CLASS(vdev); + if (k->get_config != NULL) { + k->get_config(vdev, config); + } +} + +/* Set config of the plugged device. */ +void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config) +{ + VirtIODevice *vdev = virtio_bus_get_device(bus); + VirtioDeviceClass *k; + + assert(vdev != NULL); + k = VIRTIO_DEVICE_GET_CLASS(vdev); + if (k->set_config != NULL) { + k->set_config(vdev, config); + } +} + +static char *virtio_bus_get_dev_path(DeviceState *dev) +{ + BusState *bus = qdev_get_parent_bus(dev); + DeviceState *proxy = DEVICE(bus->parent); + return qdev_get_dev_path(proxy); +} + +static char *virtio_bus_get_fw_dev_path(DeviceState *dev) +{ + return NULL; +} + +static void virtio_bus_class_init(ObjectClass *klass, void *data) +{ + BusClass *bus_class = BUS_CLASS(klass); + bus_class->get_dev_path = virtio_bus_get_dev_path; + bus_class->get_fw_dev_path = virtio_bus_get_fw_dev_path; +} + +static const TypeInfo virtio_bus_info = { + .name = TYPE_VIRTIO_BUS, + .parent = TYPE_BUS, + .instance_size = sizeof(VirtioBusState), + .abstract = true, + .class_size = sizeof(VirtioBusClass), + .class_init = virtio_bus_class_init +}; + +static void virtio_register_types(void) +{ + type_register_static(&virtio_bus_info); +} + +type_init(virtio_register_types) |