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105 lines
2.3 KiB
105 lines
2.3 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2013 - Virtual Open Systems |
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* Author: Antonios Motakis <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/vfio.h> |
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#include <linux/amba/bus.h> |
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#include "vfio_platform_private.h" |
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#define DRIVER_VERSION "0.10" |
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#define DRIVER_AUTHOR "Antonios Motakis <[email protected]>" |
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#define DRIVER_DESC "VFIO for AMBA devices - User Level meta-driver" |
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/* probing devices from the AMBA bus */ |
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static struct resource *get_amba_resource(struct vfio_platform_device *vdev, |
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int i) |
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{ |
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struct amba_device *adev = (struct amba_device *) vdev->opaque; |
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if (i == 0) |
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return &adev->res; |
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return NULL; |
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} |
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static int get_amba_irq(struct vfio_platform_device *vdev, int i) |
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{ |
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struct amba_device *adev = (struct amba_device *) vdev->opaque; |
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int ret = 0; |
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if (i < AMBA_NR_IRQS) |
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ret = adev->irq[i]; |
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/* zero is an unset IRQ for AMBA devices */ |
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return ret ? ret : -ENXIO; |
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} |
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static int vfio_amba_probe(struct amba_device *adev, const struct amba_id *id) |
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{ |
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struct vfio_platform_device *vdev; |
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int ret; |
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vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); |
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if (!vdev) |
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return -ENOMEM; |
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vdev->name = kasprintf(GFP_KERNEL, "vfio-amba-%08x", adev->periphid); |
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if (!vdev->name) { |
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kfree(vdev); |
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return -ENOMEM; |
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} |
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vdev->opaque = (void *) adev; |
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vdev->flags = VFIO_DEVICE_FLAGS_AMBA; |
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vdev->get_resource = get_amba_resource; |
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vdev->get_irq = get_amba_irq; |
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vdev->reset_required = false; |
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ret = vfio_platform_probe_common(vdev, &adev->dev); |
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if (ret) { |
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kfree(vdev->name); |
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kfree(vdev); |
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return ret; |
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} |
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dev_set_drvdata(&adev->dev, vdev); |
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return 0; |
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} |
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static void vfio_amba_remove(struct amba_device *adev) |
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{ |
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struct vfio_platform_device *vdev = dev_get_drvdata(&adev->dev); |
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vfio_platform_remove_common(vdev); |
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kfree(vdev->name); |
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kfree(vdev); |
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} |
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static const struct amba_id pl330_ids[] = { |
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{ 0, 0 }, |
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}; |
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MODULE_DEVICE_TABLE(amba, pl330_ids); |
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static struct amba_driver vfio_amba_driver = { |
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.probe = vfio_amba_probe, |
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.remove = vfio_amba_remove, |
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.id_table = pl330_ids, |
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.drv = { |
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.name = "vfio-amba", |
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.owner = THIS_MODULE, |
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}, |
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}; |
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module_amba_driver(vfio_amba_driver); |
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MODULE_VERSION(DRIVER_VERSION); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_AUTHOR(DRIVER_AUTHOR); |
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MODULE_DESCRIPTION(DRIVER_DESC);
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