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/* Copyright 2013 Freescale Semiconductor, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Freescale Semiconductor nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __SG_SW_QM_H
#define __SG_SW_QM_H
#include "linux/fsl_qman.h"
static inline void dma_to_qm_sg_one(struct qm_sg_entry *qm_sg_ptr,
dma_addr_t dma, u32 len, u32 offset)
{
qm_sg_ptr->addr = dma;
qm_sg_ptr->extension = 0;
qm_sg_ptr->final = 0;
qm_sg_ptr->length = len;
qm_sg_ptr->__reserved2 = 0;
qm_sg_ptr->bpid = 0;
qm_sg_ptr->__reserved3 = 0;
qm_sg_ptr->offset = offset;
}
/*
* convert scatterlist to h/w link table format
* but does not have final bit; instead, returns last entry
*/
static inline struct qm_sg_entry *
sg_to_qm_sg(struct scatterlist *sg, int sg_count,
struct qm_sg_entry *qm_sg_ptr, u32 offset)
{
while (sg_count) {
dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg),
sg_dma_len(sg), offset);
qm_sg_ptr++;
sg = scatterwalk_sg_next(sg);
sg_count--;
}
return qm_sg_ptr - 1;
}
/*
* convert scatterlist to h/w link table format
* scatterlist must have been previously dma mapped
*/
static inline void sg_to_qm_sg_last(struct scatterlist *sg, int sg_count,
struct qm_sg_entry *qm_sg_ptr,
u32 offset)
{
qm_sg_ptr = sg_to_qm_sg(sg, sg_count, qm_sg_ptr, offset);
qm_sg_ptr->final = 1;
}
#endif /* __SG_SW_QM_H */
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