[linux-2.6-block.git] / include / linux / iova_bitmap.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2022, Oracle and/or its affiliates.
 * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved
 */
#ifndef _IOVA_BITMAP_H_
#define _IOVA_BITMAP_H_

#include <linux/types.h>
#include <linux/errno.h>

struct iova_bitmap;

typedef int (*iova_bitmap_fn_t)(struct iova_bitmap *bitmap,
				unsigned long iova, size_t length,
				void *opaque);

#if IS_ENABLED(CONFIG_IOMMUFD_DRIVER)
struct iova_bitmap *iova_bitmap_alloc(unsigned long iova, size_t length,
				      unsigned long page_size,
				      u64 __user *data);
void iova_bitmap_free(struct iova_bitmap *bitmap);
int iova_bitmap_for_each(struct iova_bitmap *bitmap, void *opaque,
			 iova_bitmap_fn_t fn);
void iova_bitmap_set(struct iova_bitmap *bitmap,
		     unsigned long iova, size_t length);
#else
static inline struct iova_bitmap *iova_bitmap_alloc(unsigned long iova,
						    size_t length,
						    unsigned long page_size,
						    u64 __user *data)
{
	return NULL;
}

static inline void iova_bitmap_free(struct iova_bitmap *bitmap)
{
}

static inline int iova_bitmap_for_each(struct iova_bitmap *bitmap, void *opaque,
				       iova_bitmap_fn_t fn)
{
	return -EOPNOTSUPP;
}

static inline void iova_bitmap_set(struct iova_bitmap *bitmap,
				   unsigned long iova, size_t length)
{
}
#endif

#endif
Commit	Line	Data
58ccf019 JM	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	/*
	3	* Copyright (c) 2022, Oracle and/or its affiliates.
	4	* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved
	5	*/
	6	#ifndef _IOVA_BITMAP_H_
	7	#define _IOVA_BITMAP_H_
	8
	9	#include <linux/types.h>
8c9c727b	10	#include <linux/errno.h>
58ccf019 JM	11
	12	struct iova_bitmap;
	13
	14	typedef int (iova_bitmap_fn_t)(struct iova_bitmap bitmap,
	15	unsigned long iova, size_t length,
	16	void *opaque);
	17
8c9c727b	18	#if IS_ENABLED(CONFIG_IOMMUFD_DRIVER)
58ccf019 JM	19	struct iova_bitmap *iova_bitmap_alloc(unsigned long iova, size_t length,
	20	unsigned long page_size,
	21	u64 __user *data);
	22	void iova_bitmap_free(struct iova_bitmap *bitmap);
	23	int iova_bitmap_for_each(struct iova_bitmap bitmap, void opaque,
	24	iova_bitmap_fn_t fn);
	25	void iova_bitmap_set(struct iova_bitmap *bitmap,
	26	unsigned long iova, size_t length);
8c9c727b JM	27	#else
	28	static inline struct iova_bitmap *iova_bitmap_alloc(unsigned long iova,
	29	size_t length,
	30	unsigned long page_size,
	31	u64 __user *data)
	32	{
	33	return NULL;
	34	}
	35
	36	static inline void iova_bitmap_free(struct iova_bitmap *bitmap)
	37	{
	38	}
	39
	40	static inline int iova_bitmap_for_each(struct iova_bitmap bitmap, void opaque,
	41	iova_bitmap_fn_t fn)
	42	{
	43	return -EOPNOTSUPP;
	44	}
	45
	46	static inline void iova_bitmap_set(struct iova_bitmap *bitmap,
	47	unsigned long iova, size_t length)
	48	{
	49	}
	50	#endif
58ccf019 JM	51
58ccf019 JM	52	#endif