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vfio-amba has only been touched to keep up with the rest of the code base for the past 10 years. We have no basis to believe that it's currently tested or used. Mark it for deprecation. Reviewed-by: Pranjal Shrivastava <praan@google.com> Reviewed-by: Mostafa Saleh <smostafa@google.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Link: https://lore.kernel.org/r/20250825175807.3264083-2-alex.williamson@redhat.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
// 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 <a.motakis@virtualopensystems.com>
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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/pm_runtime.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 <a.motakis@virtualopensystems.com>"
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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_init_dev(struct vfio_device *core_vdev)
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{
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struct vfio_platform_device *vdev =
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container_of(core_vdev, struct vfio_platform_device, vdev);
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struct amba_device *adev = to_amba_device(core_vdev->dev);
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int ret;
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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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return -ENOMEM;
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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_init_common(vdev);
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if (ret)
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kfree(vdev->name);
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return ret;
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}
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static const struct vfio_device_ops vfio_amba_ops;
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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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dev_err_once(&adev->dev, "DEPRECATION: vfio-amba is deprecated and will be removed in a future kernel release\n");
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vdev = vfio_alloc_device(vfio_platform_device, vdev, &adev->dev,
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&vfio_amba_ops);
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if (IS_ERR(vdev))
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return PTR_ERR(vdev);
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ret = vfio_register_group_dev(&vdev->vdev);
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if (ret)
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goto out_put_vdev;
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pm_runtime_enable(&adev->dev);
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dev_set_drvdata(&adev->dev, vdev);
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return 0;
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out_put_vdev:
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vfio_put_device(&vdev->vdev);
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return ret;
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}
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static void vfio_amba_release_dev(struct vfio_device *core_vdev)
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{
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struct vfio_platform_device *vdev =
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container_of(core_vdev, struct vfio_platform_device, vdev);
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vfio_platform_release_common(vdev);
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kfree(vdev->name);
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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_unregister_group_dev(&vdev->vdev);
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pm_runtime_disable(vdev->device);
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vfio_put_device(&vdev->vdev);
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}
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static const struct vfio_device_ops vfio_amba_ops = {
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.name = "vfio-amba",
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.init = vfio_amba_init_dev,
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.release = vfio_amba_release_dev,
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.open_device = vfio_platform_open_device,
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.close_device = vfio_platform_close_device,
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.ioctl = vfio_platform_ioctl,
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.read = vfio_platform_read,
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.write = vfio_platform_write,
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.mmap = vfio_platform_mmap,
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.bind_iommufd = vfio_iommufd_physical_bind,
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.unbind_iommufd = vfio_iommufd_physical_unbind,
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.attach_ioas = vfio_iommufd_physical_attach_ioas,
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.detach_ioas = vfio_iommufd_physical_detach_ioas,
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};
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static const struct amba_id vfio_amba_ids[] = {
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{ 0, 0 },
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};
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MODULE_DEVICE_TABLE(amba, vfio_amba_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 = vfio_amba_ids,
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.drv = {
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.name = "vfio-amba",
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},
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.driver_managed_dma = true,
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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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