37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com>
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Copyright (C) 2004 Chris Kennedy <c@groovy.org>
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Copyright (C) 2006-2007 Hans Verkuil <hverkuil@xs4all.nl>
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*/
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#ifndef IVTV_UDMA_H
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#define IVTV_UDMA_H
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/* User DMA functions */
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void ivtv_udma_get_page_info(struct ivtv_dma_page_info *dma_page, unsigned long first, unsigned long size);
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int ivtv_udma_fill_sg_list(struct ivtv_user_dma *dma, struct ivtv_dma_page_info *dma_page, int map_offset);
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void ivtv_udma_fill_sg_array(struct ivtv_user_dma *dma, u32 buffer_offset, u32 buffer_offset_2, u32 split);
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int ivtv_udma_setup(struct ivtv *itv, unsigned long ivtv_dest_addr,
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void __user *userbuf, int size_in_bytes);
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void ivtv_udma_unmap(struct ivtv *itv);
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void ivtv_udma_free(struct ivtv *itv);
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void ivtv_udma_alloc(struct ivtv *itv);
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void ivtv_udma_prepare(struct ivtv *itv);
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void ivtv_udma_start(struct ivtv *itv);
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static inline void ivtv_udma_sync_for_device(struct ivtv *itv)
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{
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dma_sync_single_for_device(&itv->pdev->dev, itv->udma.SG_handle,
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sizeof(itv->udma.SGarray), DMA_TO_DEVICE);
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}
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static inline void ivtv_udma_sync_for_cpu(struct ivtv *itv)
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{
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dma_sync_single_for_cpu(&itv->pdev->dev, itv->udma.SG_handle,
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sizeof(itv->udma.SGarray), DMA_TO_DEVICE);
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}
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#endif
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