From: KONRAD Frederic <fred.kon...@greensocs.com> This patch create VirtioBus which is abstract, we can create virtio-x-bus which extends this virtio-bus.
The virtio-x-bus need to implement all the methods from the VirtioBusClass. Signed-off-by: KONRAD Frederic <fred.kon...@greensocs.com> --- hw/virtio-bus.c | 118 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ hw/virtio-bus.h | 74 ++++++++++++++++++++++++++++++++++ 2 files changed, 192 insertions(+), 0 deletions(-) create mode 100644 hw/virtio-bus.c create mode 100644 hw/virtio-bus.h diff --git a/hw/virtio-bus.c b/hw/virtio-bus.c new file mode 100644 index 0000000..c6aa02a --- /dev/null +++ b/hw/virtio-bus.c @@ -0,0 +1,118 @@ +/* + * VirtioBus + * + * Copyright (C) 2012 : GreenSocs Ltd + * http://www.greensocs.com/ , email: i...@greensocs.com + * + * Developed by : + * Frederic Konrad <fred.kon...@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.h" +#include "qemu-error.h" +#include "qdev.h" +#include "virtio-bus.h" +#include "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 + +/* Is the bus used ? */ +static inline int virtio_bus_in_use(VirtioBusState *bus) +{ + return (bus->vdev != NULL); +} + +/* Plug the VirtIODevice */ +int virtio_bus_plug_device(VirtioBusState *bus, VirtIODevice *vdev) +{ + BusState *qbus = BUS(bus); + VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus); + DPRINTF("plug device into %s.\n", qbus->name); + if (virtio_bus_in_use(bus)) { + /* that couldn't be reached if we modify qdev-monitor.c */ + error_report("%s in use.\n", qbus->name); + return -1; + } + + /* keep the VirtIODevice in the VirtioBus. */ + bus->vdev = vdev; + + /* call the "transport" callback. */ + if (klass->init != NULL) { + klass->init(qbus->parent); + } + return 0; +} + +/* Bind the VirtIODevice to the VirtioBus. */ +void virtio_bus_bind_device(VirtioBusState *bus) +{ + BusState *qbus = BUS(bus); + VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus); + assert(bus != NULL); + assert(bus->vdev != NULL); + /* + * Can we do that this way ? + */ + 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); +} + +/* Return the virtio device id of the plugged device. */ +uint16_t get_virtio_device_id(VirtioBusState *bus) +{ + return bus->vdev->device_id; +} + +static void virtio_bus_class_init(ObjectClass *klass, void *data) +{ + /* Set the default value here. */ +} + +static TypeInfo virtio_bus_info = { + .name = TYPE_VIRTIO_BUS, + .parent = TYPE_BUS, + .instance_size = sizeof(VirtioBusState), + /* Abstract the VIRTIO-BUS */ + .class_init = virtio_bus_class_init, + .abstract = true, + .class_size = sizeof(VirtioBusClass), +}; + +static void virtio_register_types(void) +{ + type_register_static(&virtio_bus_info); +} + +type_init(virtio_register_types) diff --git a/hw/virtio-bus.h b/hw/virtio-bus.h new file mode 100644 index 0000000..f79276c --- /dev/null +++ b/hw/virtio-bus.h @@ -0,0 +1,74 @@ +/* + * VirtioBus + * + * Copyright (C) 2012 : GreenSocs Ltd + * http://www.greensocs.com/ , email: i...@greensocs.com + * + * Developed by : + * Frederic Konrad <fred.kon...@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/>. + * + */ + +#ifndef VIRTIO_BUS_H +#define VIRTIO_BUS_H + +#include "qdev.h" +#include "sysemu.h" +#include "virtio.h" + +#define TYPE_VIRTIO_BUS "virtio-bus" +#define VIRTIO_BUS_GET_CLASS(obj) \ + OBJECT_GET_CLASS(VirtioBusClass, obj, TYPE_VIRTIO_BUS) +#define VIRTIO_BUS_CLASS(klass) \ + OBJECT_CLASS_CHECK(VirtioBusClass, klass, TYPE_VIRTIO_BUS) +#define VIRTIO_BUS(obj) OBJECT_CHECK(VirtioBusState, (obj), TYPE_VIRTIO_BUS) + +typedef struct VirtioBusState VirtioBusState; + +typedef struct VirtioBusClass { + /* This is what a VirtioBus must implement */ + BusClass parent; + /* Old VirtioBindings */ + void (*notify)(void * opaque, uint16_t vector); + void (*save_config)(void * opaque, QEMUFile *f); + void (*save_queue)(void * opaque, int n, QEMUFile *f); + int (*load_config)(void * opaque, QEMUFile *f); + int (*load_queue)(void * opaque, int n, QEMUFile *f); + int (*load_done)(void * opaque, QEMUFile *f); + unsigned (*get_features)(void * opaque); + bool (*query_guest_notifiers)(void * opaque); + int (*set_guest_notifiers)(void * opaque, bool assigned); + int (*set_host_notifier)(void * opaque, int n, bool assigned); + void (*vmstate_change)(void * opaque, bool running); + /* transport independent init function. */ + void (*init)(void *opaque); + /* transport independent exit function. */ + void (*exit)(void *opaque); +} VirtioBusClass; + +struct VirtioBusState { + BusState parent_obj; + /* Only one VirtIODevice can be plugged on the bus. */ + VirtIODevice *vdev; + /* VirtIOBindings for bindings the VirtIODevice. */ + VirtIOBindings bindings; +}; + +void virtio_bus_bind_device(VirtioBusState *bus); +int virtio_bus_plug_device(VirtioBusState *bus, VirtIODevice *vdev); +uint16_t get_virtio_device_id(VirtioBusState *bus); + +#endif /* VIRTIO_BUS_H */ -- 1.7.1
