release/src-rt-6.x/linux/linux-2.6/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 /* User DMA functions */
  22 void ivtv_udma_get_page_info(struct ivtv_dma_page_info *dma_page, unsigned long first, unsigned long size);
  23 int ivtv_udma_fill_sg_list(struct ivtv_user_dma *dma, struct ivtv_dma_page_info *dma_page, int map_offset);
  24 void ivtv_udma_fill_sg_array(struct ivtv_user_dma *dma, u32 buffer_offset, u32 buffer_offset_2, u32 split);
  25 int ivtv_udma_setup(struct ivtv *itv, unsigned long ivtv_dest_addr,
  26                        void __user *userbuf, int size_in_bytes);
  27 void ivtv_udma_unmap(struct ivtv *itv);
  28 void ivtv_udma_free(struct ivtv *itv);
  29 void ivtv_udma_alloc(struct ivtv *itv);
  30 void ivtv_udma_prepare(struct ivtv *itv);
  31 void ivtv_udma_start(struct ivtv *itv);
  32
  33 static inline void ivtv_udma_sync_for_device(struct ivtv *itv)
  34 {
  35         pci_dma_sync_single_for_device((struct pci_dev *)itv->dev, itv->udma.SG_handle,
  36                 sizeof(itv->udma.SGarray), PCI_DMA_TODEVICE);
  37 }
  38
  39 static inline void ivtv_udma_sync_for_cpu(struct ivtv *itv)
  40 {
  41         pci_dma_sync_single_for_cpu((struct pci_dev *)itv->dev, itv->udma.SG_handle,
  42                 sizeof(itv->udma.SGarray), PCI_DMA_TODEVICE);
  43 }