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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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38 lines
1.0 KiB
C
38 lines
1.0 KiB
C
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/*
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* Driver for the Synopsys DesignWare DMA Controller
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*
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* Copyright (C) 2007 Atmel Corporation
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* Copyright (C) 2010-2011 ST Microelectronics
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _DMA_DW_H
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#define _DMA_DW_H
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#include <linux/dmaengine.h>
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/* DMA API extensions */
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struct dw_desc;
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struct dw_cyclic_desc {
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struct dw_desc **desc;
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unsigned long periods;
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void (*period_callback)(void *param);
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void *period_callback_param;
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};
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struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan,
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dma_addr_t buf_addr, size_t buf_len, size_t period_len,
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enum dma_transfer_direction direction);
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void dw_dma_cyclic_free(struct dma_chan *chan);
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int dw_dma_cyclic_start(struct dma_chan *chan);
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void dw_dma_cyclic_stop(struct dma_chan *chan);
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dma_addr_t dw_dma_get_src_addr(struct dma_chan *chan);
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dma_addr_t dw_dma_get_dst_addr(struct dma_chan *chan);
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#endif /* _DMA_DW_H */
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