| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* |
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| 3 | * Copyright (c) 2022, Oracle and/or its affiliates. |
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| 4 | * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved |
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| 5 | */ |
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| 6 | #ifndef _IOVA_BITMAP_H_ |
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| 7 | #define _IOVA_BITMAP_H_ |
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| 8 | |
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| 9 | #include <linux/types.h> |
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| 10 | #include <linux/errno.h> |
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| 11 | |
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| 12 | struct iova_bitmap; |
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| 13 | |
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| 14 | typedef int (*iova_bitmap_fn_t)(struct iova_bitmap *bitmap, |
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| 15 | unsigned long iova, size_t length, |
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| 16 | void *opaque); |
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| 17 | |
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| 18 | #if IS_ENABLED(CONFIG_IOMMUFD_DRIVER) |
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| 19 | struct iova_bitmap *iova_bitmap_alloc(unsigned long iova, size_t length, |
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| 20 | unsigned long page_size, |
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| 21 | u64 __user *data); |
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| 22 | void iova_bitmap_free(struct iova_bitmap *bitmap); |
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| 23 | int iova_bitmap_for_each(struct iova_bitmap *bitmap, void *opaque, |
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| 24 | iova_bitmap_fn_t fn); |
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| 25 | void iova_bitmap_set(struct iova_bitmap *bitmap, |
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| 26 | unsigned long iova, size_t length); |
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| 27 | #else |
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| 28 | static inline struct iova_bitmap *iova_bitmap_alloc(unsigned long iova, |
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| 29 | size_t length, |
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| 30 | unsigned long page_size, |
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| 31 | u64 __user *data) |
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| 32 | { |
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| 33 | return NULL; |
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| 34 | } |
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| 35 | |
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| 36 | static inline void iova_bitmap_free(struct iova_bitmap *bitmap) |
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| 37 | { |
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| 38 | } |
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| 39 | |
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| 40 | static inline int iova_bitmap_for_each(struct iova_bitmap *bitmap, void *opaque, |
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| 41 | iova_bitmap_fn_t fn) |
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| 42 | { |
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| 43 | return -EOPNOTSUPP; |
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| 44 | } |
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| 45 | |
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| 46 | static inline void iova_bitmap_set(struct iova_bitmap *bitmap, |
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| 47 | unsigned long iova, size_t length) |
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| 48 | { |
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| 49 | } |
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| 50 | #endif |
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| 51 | |
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| 52 | #endif |
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| 53 | |
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