linux/drivers/vfio/platform/vfio_amba.c
Thomas Gleixner 1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation 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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:41 -07:00

110 lines
2.3 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/amba/bus.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 AMBA devices - User Level meta-driver"
/* probing devices from the AMBA bus */
static struct resource *get_amba_resource(struct vfio_platform_device *vdev,
int i)
{
struct amba_device *adev = (struct amba_device *) vdev->opaque;
if (i == 0)
return &adev->res;
return NULL;
}
static int get_amba_irq(struct vfio_platform_device *vdev, int i)
{
struct amba_device *adev = (struct amba_device *) vdev->opaque;
int ret = 0;
if (i < AMBA_NR_IRQS)
ret = adev->irq[i];
/* zero is an unset IRQ for AMBA devices */
return ret ? ret : -ENXIO;
}
static int vfio_amba_probe(struct amba_device *adev, const struct amba_id *id)
{
struct vfio_platform_device *vdev;
int ret;
vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
if (!vdev)
return -ENOMEM;
vdev->name = kasprintf(GFP_KERNEL, "vfio-amba-%08x", adev->periphid);
if (!vdev->name) {
kfree(vdev);
return -ENOMEM;
}
vdev->opaque = (void *) adev;
vdev->flags = VFIO_DEVICE_FLAGS_AMBA;
vdev->get_resource = get_amba_resource;
vdev->get_irq = get_amba_irq;
vdev->parent_module = THIS_MODULE;
vdev->reset_required = false;
ret = vfio_platform_probe_common(vdev, &adev->dev);
if (ret) {
kfree(vdev->name);
kfree(vdev);
}
return ret;
}
static int vfio_amba_remove(struct amba_device *adev)
{
struct vfio_platform_device *vdev;
vdev = vfio_platform_remove_common(&adev->dev);
if (vdev) {
kfree(vdev->name);
kfree(vdev);
return 0;
}
return -EINVAL;
}
static const struct amba_id pl330_ids[] = {
{ 0, 0 },
};
MODULE_DEVICE_TABLE(amba, pl330_ids);
static struct amba_driver vfio_amba_driver = {
.probe = vfio_amba_probe,
.remove = vfio_amba_remove,
.id_table = pl330_ids,
.drv = {
.name = "vfio-amba",
.owner = THIS_MODULE,
},
};
module_amba_driver(vfio_amba_driver);
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);