109 lines
3.8 KiB
C
109 lines
3.8 KiB
C
/*
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* Copyright 2013-2016 Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Freescale Semiconductor nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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*
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* ALTERNATIVELY, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") as published by the Free Software
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* Foundation, either version 2 of that License or (at your option) any
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* later version.
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*
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* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __SG_SW_QM_H
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#define __SG_SW_QM_H
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#include <soc/fsl/qman.h>
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#include "regs.h"
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static inline void __dma_to_qm_sg(struct qm_sg_entry *qm_sg_ptr, dma_addr_t dma,
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u16 offset)
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{
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qm_sg_entry_set64(qm_sg_ptr, dma);
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qm_sg_ptr->__reserved2 = 0;
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qm_sg_ptr->bpid = 0;
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qm_sg_ptr->offset = cpu_to_be16(offset & QM_SG_OFF_MASK);
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}
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static inline void dma_to_qm_sg_one(struct qm_sg_entry *qm_sg_ptr,
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dma_addr_t dma, u32 len, u16 offset)
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{
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__dma_to_qm_sg(qm_sg_ptr, dma, offset);
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qm_sg_entry_set_len(qm_sg_ptr, len);
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}
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static inline void dma_to_qm_sg_one_last(struct qm_sg_entry *qm_sg_ptr,
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dma_addr_t dma, u32 len, u16 offset)
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{
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__dma_to_qm_sg(qm_sg_ptr, dma, offset);
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qm_sg_entry_set_f(qm_sg_ptr, len);
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}
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static inline void dma_to_qm_sg_one_ext(struct qm_sg_entry *qm_sg_ptr,
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dma_addr_t dma, u32 len, u16 offset)
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{
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__dma_to_qm_sg(qm_sg_ptr, dma, offset);
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qm_sg_ptr->cfg = cpu_to_be32(QM_SG_EXT | (len & QM_SG_LEN_MASK));
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}
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static inline void dma_to_qm_sg_one_last_ext(struct qm_sg_entry *qm_sg_ptr,
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dma_addr_t dma, u32 len,
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u16 offset)
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{
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__dma_to_qm_sg(qm_sg_ptr, dma, offset);
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qm_sg_ptr->cfg = cpu_to_be32(QM_SG_EXT | QM_SG_FIN |
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(len & QM_SG_LEN_MASK));
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}
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/*
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* convert scatterlist to h/w link table format
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* but does not have final bit; instead, returns last entry
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*/
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static inline struct qm_sg_entry *
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sg_to_qm_sg(struct scatterlist *sg, int sg_count,
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struct qm_sg_entry *qm_sg_ptr, u16 offset)
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{
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while (sg_count && sg) {
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dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg),
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sg_dma_len(sg), offset);
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qm_sg_ptr++;
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sg = sg_next(sg);
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sg_count--;
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}
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return qm_sg_ptr - 1;
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}
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/*
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* convert scatterlist to h/w link table format
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* scatterlist must have been previously dma mapped
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*/
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static inline void sg_to_qm_sg_last(struct scatterlist *sg, int sg_count,
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struct qm_sg_entry *qm_sg_ptr, u16 offset)
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{
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qm_sg_ptr = sg_to_qm_sg(sg, sg_count, qm_sg_ptr, offset);
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qm_sg_entry_set_f(qm_sg_ptr, qm_sg_entry_get_len(qm_sg_ptr));
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}
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#endif /* __SG_SW_QM_H */
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