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 dma_sync_single_for_device(&itv->pdev->dev, itv->udma.SG_handle, 27 sizeof(itv->udma.SGarray), DMA_TO_DEVICE); 28 } 29 30 static inline void ivtv_udma_sync_for_cpu(struct ivtv *itv) 31 { 32 dma_sync_single_for_cpu(&itv->pdev->dev, itv->udma.SG_handle, 33 sizeof(itv->udma.SGarray), DMA_TO_DEVICE); 34 } 35 36 #endif 37