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virtio-gpu-pci: add virtio pci support

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This patch adds virtio-gpu-pci, which is the pci proxy for the virtio
gpu device.  With this patch in place virtio-gpu is functional.  You
need a linux guest with a virtio-gpu driver though, and output will
appear pretty late in boot, once the kernel initialized drm and fbcon.

Written by Dave Airlie and Gerd Hoffmann.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2014-09-10 14:20:34 +02:00
parent 2c84167b4e
commit 9eafb62d47
3 changed files with 83 additions and 0 deletions
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1
hw/display/Makefile.objs
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@ -36,3 +36,4 @@ obj-$(CONFIG_VGA) += vga.o
common-obj-$(CONFIG_QXL) += qxl.o qxl-logger.o qxl-render.o
obj-$(CONFIG_VIRTIO) += virtio-gpu.o
obj-$(CONFIG_VIRTIO_PCI) += virtio-gpu-pci.o

68
hw/display/virtio-gpu-pci.c Normal file
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@ -0,0 +1,68 @@
/*
* Virtio video device
*
* Copyright Red Hat
*
* Authors:
* Dave Airlie
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#include "hw/pci/pci.h"
#include "hw/virtio/virtio.h"
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/virtio-pci.h"
#include "hw/virtio/virtio-gpu.h"
static Property virtio_gpu_pci_properties[] = {
DEFINE_VIRTIO_GPU_PROPERTIES(VirtIOGPUPCI, vdev.conf),
DEFINE_VIRTIO_GPU_PCI_PROPERTIES(VirtIOPCIProxy),
DEFINE_PROP_END_OF_LIST(),
};
static void virtio_gpu_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
{
VirtIOGPUPCI *vgpu = VIRTIO_GPU_PCI(vpci_dev);
DeviceState *vdev = DEVICE(&vgpu->vdev);
qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
/* force virtio-1.0 */
vpci_dev->flags &= ~VIRTIO_PCI_FLAG_DISABLE_MODERN;
vpci_dev->flags |= VIRTIO_PCI_FLAG_DISABLE_LEGACY;
object_property_set_bool(OBJECT(vdev), true, "realized", errp);
}
static void virtio_gpu_pci_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
dc->props = virtio_gpu_pci_properties;
k->realize = virtio_gpu_pci_realize;
pcidev_k->class_id = PCI_CLASS_DISPLAY_OTHER;
}
static void virtio_gpu_initfn(Object *obj)
{
VirtIOGPUPCI *dev = VIRTIO_GPU_PCI(obj);
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_GPU);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
}
static const TypeInfo virtio_gpu_pci_info = {
.name = TYPE_VIRTIO_GPU_PCI,
.parent = TYPE_VIRTIO_PCI,
.instance_size = sizeof(VirtIOGPUPCI),
.instance_init = virtio_gpu_initfn,
.class_init = virtio_gpu_pci_class_init,
};
static void virtio_gpu_pci_register_types(void)
{
type_register_static(&virtio_gpu_pci_info);
}
type_init(virtio_gpu_pci_register_types)

14
hw/virtio/virtio-pci.h
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@ -25,6 +25,7 @@
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/virtio-9p.h"
#include "hw/virtio/virtio-input.h"
#include "hw/virtio/virtio-gpu.h"
#ifdef CONFIG_VIRTFS
#include "hw/9pfs/virtio-9p.h"
#endif
@ -42,6 +43,7 @@ typedef struct VHostSCSIPCI VHostSCSIPCI;
typedef struct VirtIORngPCI VirtIORngPCI;
typedef struct VirtIOInputPCI VirtIOInputPCI;
typedef struct VirtIOInputHIDPCI VirtIOInputHIDPCI;
typedef struct VirtIOGPUPCI VirtIOGPUPCI;
/* virtio-pci-bus */
@ -261,6 +263,18 @@ struct VirtIOInputHIDPCI {
VirtIOInputHID vdev;
};
/*
* virtio-gpu-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VIRTIO_GPU_PCI "virtio-gpu-pci"
#define VIRTIO_GPU_PCI(obj) \
OBJECT_CHECK(VirtIOGPUPCI, (obj), TYPE_VIRTIO_GPU_PCI)
struct VirtIOGPUPCI {
VirtIOPCIProxy parent_obj;
VirtIOGPU vdev;
};
/* Virtio ABI version, if we increment this, we break the guest driver. */
#define VIRTIO_PCI_ABI_VERSION 0