81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
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/*
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* Huawei HiNIC PCI Express Linux driver
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* Copyright(c) 2017 Huawei Technologies Co., Ltd
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <asm/byteorder.h>
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#include "hinic_common.h"
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/**
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* hinic_cpu_to_be32 - convert data to big endian 32 bit format
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* @data: the data to convert
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* @len: length of data to convert
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**/
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void hinic_cpu_to_be32(void *data, int len)
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{
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u32 *mem = data;
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int i;
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len = len / sizeof(u32);
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for (i = 0; i < len; i++) {
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*mem = cpu_to_be32(*mem);
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mem++;
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}
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}
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/**
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* hinic_be32_to_cpu - convert data from big endian 32 bit format
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* @data: the data to convert
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* @len: length of data to convert
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**/
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void hinic_be32_to_cpu(void *data, int len)
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{
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u32 *mem = data;
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int i;
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len = len / sizeof(u32);
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for (i = 0; i < len; i++) {
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*mem = be32_to_cpu(*mem);
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mem++;
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}
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}
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/**
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* hinic_set_sge - set dma area in scatter gather entry
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* @sge: scatter gather entry
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* @addr: dma address
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* @len: length of relevant data in the dma address
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**/
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void hinic_set_sge(struct hinic_sge *sge, dma_addr_t addr, int len)
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{
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sge->hi_addr = upper_32_bits(addr);
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sge->lo_addr = lower_32_bits(addr);
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sge->len = len;
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}
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/**
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* hinic_sge_to_dma - get dma address from scatter gather entry
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* @sge: scatter gather entry
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*
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* Return dma address of sg entry
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**/
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dma_addr_t hinic_sge_to_dma(struct hinic_sge *sge)
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{
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return (dma_addr_t)((((u64)sge->hi_addr) << 32) | sge->lo_addr);
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}
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