1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2013 - Virtual Open Systems
4 * Author: Antonios Motakis <a.motakis@virtualopensystems.com>
7 #include <linux/module.h>
8 #include <linux/slab.h>
9 #include <linux/vfio.h>
10 #include <linux/amba/bus.h>
12 #include "vfio_platform_private.h"
14 #define DRIVER_VERSION "0.10"
15 #define DRIVER_AUTHOR "Antonios Motakis <a.motakis@virtualopensystems.com>"
16 #define DRIVER_DESC "VFIO for AMBA devices - User Level meta-driver"
18 /* probing devices from the AMBA bus */
20 static struct resource *get_amba_resource(struct vfio_platform_device *vdev,
23 struct amba_device *adev = (struct amba_device *) vdev->opaque;
31 static int get_amba_irq(struct vfio_platform_device *vdev, int i)
33 struct amba_device *adev = (struct amba_device *) vdev->opaque;
39 /* zero is an unset IRQ for AMBA devices */
40 return ret ? ret : -ENXIO;
43 static int vfio_amba_probe(struct amba_device *adev, const struct amba_id *id)
45 struct vfio_platform_device *vdev;
48 vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
52 vdev->name = kasprintf(GFP_KERNEL, "vfio-amba-%08x", adev->periphid);
58 vdev->opaque = (void *) adev;
59 vdev->flags = VFIO_DEVICE_FLAGS_AMBA;
60 vdev->get_resource = get_amba_resource;
61 vdev->get_irq = get_amba_irq;
62 vdev->reset_required = false;
64 ret = vfio_platform_probe_common(vdev, &adev->dev);
71 dev_set_drvdata(&adev->dev, vdev);
75 static void vfio_amba_remove(struct amba_device *adev)
77 struct vfio_platform_device *vdev = dev_get_drvdata(&adev->dev);
79 vfio_platform_remove_common(vdev);
84 static const struct amba_id pl330_ids[] = {
88 MODULE_DEVICE_TABLE(amba, pl330_ids);
90 static struct amba_driver vfio_amba_driver = {
91 .probe = vfio_amba_probe,
92 .remove = vfio_amba_remove,
93 .id_table = pl330_ids,
98 .driver_managed_dma = true,
101 module_amba_driver(vfio_amba_driver);
103 MODULE_VERSION(DRIVER_VERSION);
104 MODULE_LICENSE("GPL v2");
105 MODULE_AUTHOR(DRIVER_AUTHOR);
106 MODULE_DESCRIPTION(DRIVER_DESC);