android_kernel_oneplus_msm8998/include/linux/msm_dma_iommu_mapping.h

/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef _LINUX_MSM_DMA_IOMMU_MAPPING_H
#define _LINUX_MSM_DMA_IOMMU_MAPPING_H

#include <linux/device.h>
#include <linux/dma-buf.h>
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>

enum msm_dma_map_attr {
	MSM_DMA_ATTR_NO_DELAYED_UNMAP = 0x1,
};

/*
* This function is not taking a reference to the dma_buf here. It is expected
* that clients hold reference to the dma_buf until they are done with mapping
* and unmapping.
*/
int msm_dma_map_sg_attrs(struct device *dev, struct scatterlist *sg, int nents,
		   enum dma_data_direction dir, struct dma_buf *dma_buf,
		   int flags);

static inline int msm_dma_map_sg_lazy(struct device *dev,
			       struct scatterlist *sg, int nents,
			       enum dma_data_direction dir,
			       struct dma_buf *dma_buf)
{
	return msm_dma_map_sg_attrs(dev, sg, nents, dir, dma_buf, 0);
}

static inline int msm_dma_map_sg(struct device *dev, struct scatterlist *sg,
				  int nents, enum dma_data_direction dir,
				  struct dma_buf *dma_buf)
{
	return msm_dma_map_sg_attrs(dev, sg, nents, dir, dma_buf,
			      MSM_DMA_ATTR_NO_DELAYED_UNMAP);
}

void msm_dma_unmap_sg(struct device *dev, struct scatterlist *sgl, int nents,
		      enum dma_data_direction dir, struct dma_buf *dma_buf);


/*
 * Below is private function only to be called by framework (ION) and not by
 * clients.
 */

void msm_dma_buf_freed(void *buffer);

#endif