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51 lines
1.2 KiB
51 lines
1.2 KiB
8 months ago
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2018 Rockchip Electronics Co., Ltd
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*/
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#ifndef __RAMDISK_H__
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#define __RAMDISK_H__
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struct ramdisk_ops {
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/*
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* read() - read from a block device
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*
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* @desc: Block descriptor
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* @start: Start block number to read
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* @blkcnt: Number of blocks to read
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* @buffer: Destination buffer for data read
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*
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* @return blkcnt is OK, otherwise is error.
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*/
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ulong (*read)(struct blk_desc *desc,
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lbaint_t start, lbaint_t blkcnt, void *buffer);
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/*
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* write() - write to a block device
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*
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* @desc: Block descriptor
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* @start: Start block number to write
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* @blkcnt: Number of blocks to write
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* @buffer: Source buffer for data to write
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*
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* @return blkcnt is OK, otherwise is error.
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*/
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ulong (*write)(struct blk_desc *desc,
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lbaint_t start, lbaint_t blkcnt, const void *buffer);
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/*
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* erase() - erase a section of a block device
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*
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* @desc: Block descriptor
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* @start: Start block number to erase
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* @blkcnt: Number of blocks to erase
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*
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* @return blkcnt is OK, otherwise is error.
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*/
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ulong (*erase)(struct blk_desc *desc, lbaint_t start, lbaint_t blkcnt);
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};
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int dm_ramdisk_is_enabled(void);
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#endif /* __RAMDISK_H__ */
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