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68 lines
No EOL
1.9 KiB
C
68 lines
No EOL
1.9 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 _FPGA_DMA_H_
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#define _FPGA_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 FPGA_DMA_BASEADDR 0x00000000
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#define FPGA_DMA_BOUNDARY 0x1000
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#define FPGA_DMA_BD_OFFSET 0xC0000000
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#define FPGA_DMA_BD_SIZE (32 << 20) // 32 MB
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#define XAXIDMA_SR_SGINCL_MASK 0x00000008
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struct dma_mem {
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char *base_virt;
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char *base_phys;
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size_t len;
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};
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struct dma {
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XAxiDma inst;
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struct dma_mem bd;
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};
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struct ip;
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int dma_mem_split(struct dma_mem *o, struct dma_mem *a, struct dma_mem *b);
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int dma_alloc(struct ip *c, struct dma_mem *mem, size_t len, int flags);
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int dma_free(struct ip *c, struct dma_mem *mem);
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int dma_write(struct ip *c, char *buf, size_t len);
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int dma_read(struct ip *c, char *buf, size_t len);
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int dma_read_complete(struct ip *c, char **buf, size_t *len);
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int dma_write_complete(struct ip *c, char **buf, size_t *len);
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int dma_sg_write(struct ip *c, char *buf, size_t len);
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int dma_sg_read(struct ip *c, char *buf, size_t len);
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int dma_sg_write_complete(struct ip *c, char **buf, size_t *len);
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int dma_sg_read_complete(struct ip *c, char **buf, size_t *len);
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int dma_simple_read(struct ip *c, char *buf, size_t len);
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int dma_simple_write(struct ip *c, char *buf, size_t len);
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int dma_simple_read_complete(struct ip *c, char **buf, size_t *len);
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int dma_simple_write_complete(struct ip *c, char **buf, size_t *len);
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int dma_ping_pong(struct ip *c, char *src, char *dst, size_t len);
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int dma_init(struct ip *c);
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#endif /* _FPGA_DMA_H_ */ |