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/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
/*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* Copyright(c) 2022 Intel Corporation
*/
#ifndef __SOC_SOF_UTILS_H
#define __SOC_SOF_UTILS_H
struct snd_dma_buffer;
struct device;
/*
* Number of PFNs which can be stored in a page table of @bytes size.
* The PFNs are compressed to 2.5 bytes each but they are written with 32 bit
* accesses, therefore the last PFN can reach up to 3 bytes past the space it
* needs for itself.
*/
#define SOF_PAGE_TABLE_MAX_PFNS(bytes) \
(((((bytes) - sizeof(u32)) << 1) + 1) / 5 + 1)
int snd_sof_create_page_table(struct device *dev,
struct snd_dma_buffer *dmab,
struct snd_dma_buffer *page_table, size_t size);
#endif
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