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/*
* bmm_dmabuf.h
*
* CMA backed dma_buf management
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Portions (C) Copyright 2007 Marvell International Ltd.
* All Rights Reserved
*/
#ifndef _BMM_DMABUF_H
#define _BMM_DMABUF_H
#include <linux/dma-mapping.h>
#include <linux/ioctl.h>
#include <linux/types.h>
/* ioctl commands */
struct bmm_fd_alloc {
__u64 size;
__u64 align;
__u32 attr;
__s32 fd;
};
struct bmm_fd_flush {
__u64 size;
__u64 offset;
__u64 ptr;
__s32 fd;
__u32 direction;
};
#define BMEM_IOCTL_MAGIC 'G'
#define BMM_FD_ALLOC _IOWR(BMEM_IOCTL_MAGIC, 64, struct bmm_fd_alloc)
#define BMM_FD_FLUSH _IOW(BMEM_IOCTL_MAGIC, 65, struct bmm_fd_flush)
/* ioctl arguments: memory attributes */
#define BMM_ATTR_DEFAULT (0) /* cacheable bufferable */
#define BMM_ATTR_WRITECOMBINE (1 << 0) /* non-cacheable & bufferable */
#define BMM_ATTR_NONCACHED (1 << 1) /* non-cacheable & non-bufferable */
/* ioctl arguments: cache flush direction */
#define BMM_DMA_BIDIRECTIONAL 0
#define BMM_DMA_TO_DEVICE 1
#define BMM_DMA_FROM_DEVICE 2
#define BMM_DMA_NONE 3
#endif
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