linux/drivers/iommu/io-pgtable.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Generic page table allocator for IOMMUs.
 *
 * Copyright (C) 2014 ARM Limited
 *
 * Author: Will Deacon <[email protected]>
 */

#include <linux/bug.h>
#include <linux/io-pgtable.h>
#include <linux/kernel.h>
#include <linux/types.h>

static const struct io_pgtable_init_fns *
io_pgtable_init_table[IO_PGTABLE_NUM_FMTS] = …;

static int check_custom_allocator(enum io_pgtable_fmt fmt,
				  struct io_pgtable_cfg *cfg)
{ … }

struct io_pgtable_ops *alloc_io_pgtable_ops(enum io_pgtable_fmt fmt,
					    struct io_pgtable_cfg *cfg,
					    void *cookie)
{ … }
EXPORT_SYMBOL_GPL(…);

/*
 * It is the IOMMU driver's responsibility to ensure that the page table
 * is no longer accessible to the walker by this point.
 */
void free_io_pgtable_ops(struct io_pgtable_ops *ops)
{ … }
EXPORT_SYMBOL_GPL(…);