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 */
  13 void ivtv_udma_get_page_info(struct ivtv_dma_page_info *dma_page, unsigned long first, unsigned long size);
  14 int ivtv_udma_fill_sg_list(struct ivtv_user_dma *dma, struct ivtv_dma_page_info *dma_page, int map_offset);
  15 void ivtv_udma_fill_sg_array(struct ivtv_user_dma *dma, u32 buffer_offset, u32 buffer_offset_2, u32 split);
  16 int ivtv_udma_setup(struct ivtv *itv, unsigned long ivtv_dest_addr,
  17                        void __user *userbuf, int size_in_bytes);
  18 void ivtv_udma_unmap(struct ivtv *itv);
  19 void ivtv_udma_free(struct ivtv *itv);
  20 void ivtv_udma_alloc(struct ivtv *itv);
  21 void ivtv_udma_prepare(struct ivtv *itv);
  22 void ivtv_udma_start(struct ivtv *itv);
  23
  24 static 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
  30 static 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