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42 lines
No EOL
1.1 KiB
C
42 lines
No EOL
1.1 KiB
C
/** DMA related helper functions
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*
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* These functions present a simpler interface to Xilinx' DMA driver (XAxiDma_*)
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*
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* @file
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2015-2016, Steffen Vogel
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* This file is part of S2SS. All Rights Reserved. Proprietary and confidential.
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* Unauthorized copying of this file, via any medium is strictly prohibited.
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**********************************************************************************/
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#ifndef _DMA_H_
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#define _DMA_H_
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#include <stdlib.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <xilinx/xaxidma.h>
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#define XAXIDMA_SR_SGINCL_MASK 0x00000008
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enum dma_mode {
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DMA_MODE_SIMPLE,
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DMA_MODE_SG
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};
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struct dma_mem {
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uint32_t base_virt;
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uint32_t base_phys;
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size_t len;
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};
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int dma_init(XAxiDma *xdma, char *baseaddr, enum dma_mode mode, struct dma_mem *bd, struct dma_mem *rx, size_t maxlen);
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ssize_t dma_write(XAxiDma *xdma, char *buf, size_t len, int irq);
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ssize_t dma_read(XAxiDma *xdma, char *buf, size_t len, int irq);
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ssize_t dma_ping_pong(XAxiDma *xdma, char *src, char *dst, size_t len, int s2mm_irq);
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#endif /* _DMA_H_ */ |