51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Omnitek Scatter-Gather DMA Controller
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*
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* Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates.
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* All rights reserved.
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*/
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#ifndef COBALT_OMNITEK_H
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#define COBALT_OMNITEK_H
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#include <linux/scatterlist.h>
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#include "cobalt-driver.h"
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struct sg_dma_descriptor {
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u32 pci_l;
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u32 pci_h;
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u32 local;
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u32 reserved0;
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u32 next_l;
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u32 next_h;
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u32 bytes;
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u32 reserved1;
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};
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int omni_sg_dma_init(struct cobalt *cobalt);
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void omni_sg_dma_abort_channel(struct cobalt_stream *s);
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void omni_sg_dma_start(struct cobalt_stream *s, struct sg_dma_desc_info *desc);
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bool is_dma_done(struct cobalt_stream *s);
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int descriptor_list_create(struct cobalt *cobalt,
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struct scatterlist *scatter_list, bool to_pci, unsigned sglen,
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unsigned size, unsigned width, unsigned stride,
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struct sg_dma_desc_info *desc);
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void descriptor_list_chain(struct sg_dma_desc_info *this,
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struct sg_dma_desc_info *next);
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void descriptor_list_loopback(struct sg_dma_desc_info *desc);
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void descriptor_list_end_of_chain(struct sg_dma_desc_info *desc);
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void *descriptor_list_allocate(struct sg_dma_desc_info *desc, size_t bytes);
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void descriptor_list_free(struct sg_dma_desc_info *desc);
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void descriptor_list_interrupt_enable(struct sg_dma_desc_info *desc);
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void descriptor_list_interrupt_disable(struct sg_dma_desc_info *desc);
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#endif
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