128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2013 - Virtual Open Systems
|
|
* Author: Antonios Motakis <a.motakis@virtualopensystems.com>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/vfio.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include "vfio_platform_private.h"
|
|
|
|
#define DRIVER_VERSION "0.10"
|
|
#define DRIVER_AUTHOR "Antonios Motakis <a.motakis@virtualopensystems.com>"
|
|
#define DRIVER_DESC "VFIO for platform devices - User Level meta-driver"
|
|
|
|
static bool reset_required = true;
|
|
module_param(reset_required, bool, 0444);
|
|
MODULE_PARM_DESC(reset_required, "override reset requirement (default: 1)");
|
|
|
|
/* probing devices from the linux platform bus */
|
|
|
|
static struct resource *get_platform_resource(struct vfio_platform_device *vdev,
|
|
int num)
|
|
{
|
|
struct platform_device *dev = (struct platform_device *) vdev->opaque;
|
|
|
|
return platform_get_mem_or_io(dev, num);
|
|
}
|
|
|
|
static int get_platform_irq(struct vfio_platform_device *vdev, int i)
|
|
{
|
|
struct platform_device *pdev = (struct platform_device *) vdev->opaque;
|
|
|
|
return platform_get_irq_optional(pdev, i);
|
|
}
|
|
|
|
static int vfio_platform_init_dev(struct vfio_device *core_vdev)
|
|
{
|
|
struct vfio_platform_device *vdev =
|
|
container_of(core_vdev, struct vfio_platform_device, vdev);
|
|
struct platform_device *pdev = to_platform_device(core_vdev->dev);
|
|
|
|
vdev->opaque = (void *) pdev;
|
|
vdev->name = pdev->name;
|
|
vdev->flags = VFIO_DEVICE_FLAGS_PLATFORM;
|
|
vdev->get_resource = get_platform_resource;
|
|
vdev->get_irq = get_platform_irq;
|
|
vdev->reset_required = reset_required;
|
|
|
|
return vfio_platform_init_common(vdev);
|
|
}
|
|
|
|
static const struct vfio_device_ops vfio_platform_ops;
|
|
static int vfio_platform_probe(struct platform_device *pdev)
|
|
{
|
|
struct vfio_platform_device *vdev;
|
|
int ret;
|
|
|
|
vdev = vfio_alloc_device(vfio_platform_device, vdev, &pdev->dev,
|
|
&vfio_platform_ops);
|
|
if (IS_ERR(vdev))
|
|
return PTR_ERR(vdev);
|
|
|
|
ret = vfio_register_group_dev(&vdev->vdev);
|
|
if (ret)
|
|
goto out_put_vdev;
|
|
|
|
pm_runtime_enable(&pdev->dev);
|
|
dev_set_drvdata(&pdev->dev, vdev);
|
|
return 0;
|
|
|
|
out_put_vdev:
|
|
vfio_put_device(&vdev->vdev);
|
|
return ret;
|
|
}
|
|
|
|
static void vfio_platform_release_dev(struct vfio_device *core_vdev)
|
|
{
|
|
struct vfio_platform_device *vdev =
|
|
container_of(core_vdev, struct vfio_platform_device, vdev);
|
|
|
|
vfio_platform_release_common(vdev);
|
|
}
|
|
|
|
static int vfio_platform_remove(struct platform_device *pdev)
|
|
{
|
|
struct vfio_platform_device *vdev = dev_get_drvdata(&pdev->dev);
|
|
|
|
vfio_unregister_group_dev(&vdev->vdev);
|
|
pm_runtime_disable(vdev->device);
|
|
vfio_put_device(&vdev->vdev);
|
|
return 0;
|
|
}
|
|
|
|
static const struct vfio_device_ops vfio_platform_ops = {
|
|
.name = "vfio-platform",
|
|
.init = vfio_platform_init_dev,
|
|
.release = vfio_platform_release_dev,
|
|
.open_device = vfio_platform_open_device,
|
|
.close_device = vfio_platform_close_device,
|
|
.ioctl = vfio_platform_ioctl,
|
|
.read = vfio_platform_read,
|
|
.write = vfio_platform_write,
|
|
.mmap = vfio_platform_mmap,
|
|
.bind_iommufd = vfio_iommufd_physical_bind,
|
|
.unbind_iommufd = vfio_iommufd_physical_unbind,
|
|
.attach_ioas = vfio_iommufd_physical_attach_ioas,
|
|
};
|
|
|
|
static struct platform_driver vfio_platform_driver = {
|
|
.probe = vfio_platform_probe,
|
|
.remove = vfio_platform_remove,
|
|
.driver = {
|
|
.name = "vfio-platform",
|
|
},
|
|
.driver_managed_dma = true,
|
|
};
|
|
|
|
module_platform_driver(vfio_platform_driver);
|
|
|
|
MODULE_VERSION(DRIVER_VERSION);
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|