LXR linux/drivers/media/pci/ivtv/ivtv-udma.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3    Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
   4    Copyright (C) 2004  Chris Kennedy <c@groovy.org>
   5    Copyright (C) 2006-2007  Hans Verkuil <hverkuil@xs4all.nl>
   6
   7 */
   8
   9#ifndef IVTV_UDMA_H
  10#define IVTV_UDMA_H
  11
  12/* User DMA functions */
  13void ivtv_udma_get_page_info(struct ivtv_dma_page_info *dma_page, unsigned long first, unsigned long size);
  14int ivtv_udma_fill_sg_list(struct ivtv_user_dma *dma, struct ivtv_dma_page_info *dma_page, int map_offset);
  15void ivtv_udma_fill_sg_array(struct ivtv_user_dma *dma, u32 buffer_offset, u32 buffer_offset_2, u32 split);
  16int ivtv_udma_setup(struct ivtv *itv, unsigned long ivtv_dest_addr,
  17                       void __user *userbuf, int size_in_bytes);
  18void ivtv_udma_unmap(struct ivtv *itv);
  19void ivtv_udma_free(struct ivtv *itv);
  20void ivtv_udma_alloc(struct ivtv *itv);
  21void ivtv_udma_prepare(struct ivtv *itv);
  22void ivtv_udma_start(struct ivtv *itv);
  23
  24static inline void ivtv_udma_sync_for_device(struct ivtv *itv)
  25{
  26        pci_dma_sync_single_for_device(itv->pdev, itv->udma.SG_handle,
  27                sizeof(itv->udma.SGarray), PCI_DMA_TODEVICE);
  28}
  29
  30static inline void ivtv_udma_sync_for_cpu(struct ivtv *itv)
  31{
  32        pci_dma_sync_single_for_cpu(itv->pdev, itv->udma.SG_handle,
  33                sizeof(itv->udma.SGarray), PCI_DMA_TODEVICE);
  34}
  35
  36#endif
  37