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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/include/linux/mdev.h
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@@ -1,19 +1,30 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * Mediated device definition
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  *
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  * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
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  *     Author: Neo Jia <cjia@nvidia.com>
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  *             Kirti Wankhede <kwankhede@nvidia.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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  */
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 #ifndef MDEV_H
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 #define MDEV_H
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 struct mdev_device;
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+
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+/*
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+ * Called by the parent device driver to set the device which represents
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+ * this mdev in iommu protection scope. By default, the iommu device is
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+ * NULL, that indicates using vendor defined isolation.
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+ *
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+ * @dev: the mediated device that iommu will isolate.
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+ * @iommu_device: a pci device which represents the iommu for @dev.
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+ *
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+ * Return 0 for success, otherwise negative error value.
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+ */
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+int mdev_set_iommu_device(struct device *dev, struct device *iommu_device);
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+
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+struct device *mdev_get_iommu_device(struct device *dev);
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 /**
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  * struct mdev_parent_ops - Structure to be registered for each parent device to
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@@ -118,21 +129,20 @@
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 #define to_mdev_driver(drv)	container_of(drv, struct mdev_driver, driver)
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-extern void *mdev_get_drvdata(struct mdev_device *mdev);
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-extern void mdev_set_drvdata(struct mdev_device *mdev, void *data);
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-extern uuid_le mdev_uuid(struct mdev_device *mdev);
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+void *mdev_get_drvdata(struct mdev_device *mdev);
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+void mdev_set_drvdata(struct mdev_device *mdev, void *data);
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+const guid_t *mdev_uuid(struct mdev_device *mdev);
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 extern struct bus_type mdev_bus_type;
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-extern int  mdev_register_device(struct device *dev,
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-				 const struct mdev_parent_ops *ops);
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-extern void mdev_unregister_device(struct device *dev);
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+int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops);
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+void mdev_unregister_device(struct device *dev);
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-extern int  mdev_register_driver(struct mdev_driver *drv, struct module *owner);
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-extern void mdev_unregister_driver(struct mdev_driver *drv);
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+int mdev_register_driver(struct mdev_driver *drv, struct module *owner);
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+void mdev_unregister_driver(struct mdev_driver *drv);
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-extern struct device *mdev_parent_dev(struct mdev_device *mdev);
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-extern struct device *mdev_dev(struct mdev_device *mdev);
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-extern struct mdev_device *mdev_from_dev(struct device *dev);
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+struct device *mdev_parent_dev(struct mdev_device *mdev);
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+struct device *mdev_dev(struct mdev_device *mdev);
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+struct mdev_device *mdev_from_dev(struct device *dev);
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 #endif /* MDEV_H */