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Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at>
Copyright (C) 2004 Chris Kennedy <>
Copyright (C) 2006-2007 Hans Verkuil <>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifndef IVTV_UDMA_H
#define IVTV_UDMA_H
/* User DMA functions */
void ivtv_udma_get_page_info(struct ivtv_dma_page_info *dma_page, unsigned long first, unsigned long size);
int ivtv_udma_fill_sg_list(struct ivtv_user_dma *dma, struct ivtv_dma_page_info *dma_page, int map_offset);
void ivtv_udma_fill_sg_array(struct ivtv_user_dma *dma, u32 buffer_offset, u32 buffer_offset_2, u32 split);
int ivtv_udma_setup(struct ivtv *itv, unsigned long ivtv_dest_addr,
void __user *userbuf, int size_in_bytes);
void ivtv_udma_unmap(struct ivtv *itv);
void ivtv_udma_free(struct ivtv *itv);
void ivtv_udma_alloc(struct ivtv *itv);
void ivtv_udma_prepare(struct ivtv *itv);
void ivtv_udma_start(struct ivtv *itv);
static inline void ivtv_udma_sync_for_device(struct ivtv *itv)
pci_dma_sync_single_for_device(itv->pdev, itv->udma.SG_handle,
sizeof(itv->udma.SGarray), PCI_DMA_TODEVICE);
static inline void ivtv_udma_sync_for_cpu(struct ivtv *itv)
pci_dma_sync_single_for_cpu(itv->pdev, itv->udma.SG_handle,
sizeof(itv->udma.SGarray), PCI_DMA_TODEVICE);