You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
95 lines
2.7 KiB
95 lines
2.7 KiB
/* Copyright (c) 2015-2016, 2018 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>
|
|
|
|
#ifdef CONFIG_QCOM_LAZY_MAPPING
|
|
struct msm_iommu_data {
|
|
struct list_head map_list;
|
|
struct mutex lock;
|
|
};
|
|
|
|
/*
|
|
* 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,
|
|
unsigned long attrs);
|
|
|
|
void msm_dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sgl,
|
|
int nents, enum dma_data_direction dir,
|
|
struct dma_buf *dma_buf, unsigned long attrs);
|
|
|
|
void msm_dma_unmap_all_for_dev(struct device *dev);
|
|
|
|
/*
|
|
* Below is private function only to be called by framework (ION) and not by
|
|
* clients.
|
|
*/
|
|
void msm_dma_buf_freed(struct msm_iommu_data *data);
|
|
|
|
#else /*CONFIG_QCOM_LAZY_MAPPING*/
|
|
|
|
static inline int msm_dma_map_sg_attrs(struct device *dev,
|
|
struct scatterlist *sg, int nents,
|
|
enum dma_data_direction dir, struct dma_buf *dma_buf,
|
|
unsigned long attrs)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
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 -EINVAL;
|
|
}
|
|
|
|
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 -EINVAL;
|
|
}
|
|
|
|
static inline void msm_dma_unmap_sg(struct device *dev,
|
|
struct scatterlist *sgl, int nents,
|
|
enum dma_data_direction dir,
|
|
struct dma_buf *dma_buf)
|
|
{
|
|
}
|
|
|
|
static inline void msm_dma_unmap_sg_attrs(struct device *dev,
|
|
struct scatterlist *sgl,
|
|
int nents, enum dma_data_direction dir,
|
|
struct dma_buf *dma_buf, unsigned long attrs)
|
|
{
|
|
}
|
|
|
|
static inline int msm_dma_unmap_all_for_dev(struct device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void msm_dma_buf_freed(void *buffer) {}
|
|
#endif /*CONFIG_QCOM_LAZY_MAPPING*/
|
|
|
|
#endif
|
|
|