platform/broadcom/saibcm-modules/systems/bde/linux/include/linux_dma.h

/*
 * Copyright 2007-2020 Broadcom Inc. All rights reserved.
 * 
 * Permission is granted to use, copy, modify and/or distribute this
 * software under either one of the licenses below.
 * 
 * License Option 1: GPL
 * 
 * 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 (the "GPL").
 * 
 * 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 version 2 (GPLv2) for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 (GPLv2) along with this source code.
 * 
 * 
 * License Option 2: Broadcom Open Network Switch APIs (OpenNSA) license
 * 
 * This software is governed by the Broadcom Open Network Switch APIs license:
 * https://www.broadcom.com/products/ethernet-connectivity/software/opennsa
 */
/***********************************************************************
 *
 * $Id: linux_dma.h,v 1.24 Broadcom SDK $
 * $Copyright: (c) 2016 Broadcom Corp.
 * All Rights Reserved.$
 *
 **********************************************************************/

#ifndef __LINUX_DMA_H__
#define __LINUX_DMA_H__

#include <sal/types.h>

#ifdef __KERNEL__

#ifdef SAL_BDE_XLP
#define KMALLOC(size, flags)    __kmalloc(size, flags)
#else
#define KMALLOC(size, flags)    kmalloc(size, flags)
#endif

#if defined (__mips__)
#if defined(CONFIG_NONCOHERENT_IO) || defined(CONFIG_DMA_NONCOHERENT)
/* Use flush/invalidate for cached memory */
#define NONCOHERENT_DMA_MEMORY
/* Remap virtual DMA addresses to non-cached segment */
#define REMAP_DMA_NONCACHED
#endif /* CONFIG_NONCOHERENT_IO || CONFIG_DMA_NONCOHERENT */
#endif /* __mips__ */

#if defined(BCM958525) && (LINUX_VERSION_CODE <= KERNEL_VERSION(3,6,5))
#define REMAP_DMA_NONCACHED
#endif

#ifndef DMA_BIT_MASK
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
#endif

extern void _dma_init(void);
extern void _dma_per_device_init(int dev_index);
extern int _dma_cleanup(void);
extern void _dma_pprint(struct seq_file *m);
extern uint32_t *_salloc(int d, int size, const char *name);
extern void _sfree(int d, void *ptr);
extern int _sinval(int d, void *ptr, int length);
extern int _sflush(int d, void *ptr, int length);
extern sal_paddr_t _l2p(int d, void *vaddr);
extern void *_p2l(int d, sal_paddr_t paddr);
extern int _dma_pool_allocated(void);
extern int _dma_mmap(struct file *filp, struct vm_area_struct *vma);

#endif /* __KERNEL__ */

#endif /* __LINUX_DMA_H__ */