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

   1/*
   2    Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
   3    Copyright (C) 2004  Chris Kennedy <c@groovy.org>
   4    Copyright (C) 2006-2007  Hans Verkuil <hverkuil@xs4all.nl>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19 */
  20
  21#ifndef IVTV_UDMA_H
  22#define IVTV_UDMA_H
  23
  24/* User DMA functions */
  25void ivtv_udma_get_page_info(struct ivtv_dma_page_info *dma_page, unsigned long first, unsigned long size);
  26int ivtv_udma_fill_sg_list(struct ivtv_user_dma *dma, struct ivtv_dma_page_info *dma_page, int map_offset);
  27void ivtv_udma_fill_sg_array(struct ivtv_user_dma *dma, u32 buffer_offset, u32 buffer_offset_2, u32 split);
  28int ivtv_udma_setup(struct ivtv *itv, unsigned long ivtv_dest_addr,
  29                       void __user *userbuf, int size_in_bytes);
  30void ivtv_udma_unmap(struct ivtv *itv);
  31void ivtv_udma_free(struct ivtv *itv);
  32void ivtv_udma_alloc(struct ivtv *itv);
  33void ivtv_udma_prepare(struct ivtv *itv);
  34void ivtv_udma_start(struct ivtv *itv);
  35
  36static inline void ivtv_udma_sync_for_device(struct ivtv *itv)
  37{
  38        pci_dma_sync_single_for_device(itv->pdev, itv->udma.SG_handle,
  39                sizeof(itv->udma.SGarray), PCI_DMA_TODEVICE);
  40}
  41
  42static inline void ivtv_udma_sync_for_cpu(struct ivtv *itv)
  43{
  44        pci_dma_sync_single_for_cpu(itv->pdev, itv->udma.SG_handle,
  45                sizeof(itv->udma.SGarray), PCI_DMA_TODEVICE);
  46}
  47
  48#endif
  49