1 /* 2 * Huawei HiNIC PCI Express Linux driver 3 * Copyright(c) 2017 Huawei Technologies Co., Ltd 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * for more details. 13 * 14 */ 15 16 #include <linux/kernel.h> 17 #include <linux/types.h> 18 #include <asm/byteorder.h> 19 20 #include "hinic_common.h" 21 22 /** 23 * hinic_cpu_to_be32 - convert data to big endian 32 bit format 24 * @data: the data to convert 25 * @len: length of data to convert 26 **/ 27 void hinic_cpu_to_be32(void *data, int len) 28 { 29 u32 *mem = data; 30 int i; 31 32 len = len / sizeof(u32); 33 34 for (i = 0; i < len; i++) { 35 *mem = cpu_to_be32(*mem); 36 mem++; 37 } 38 } 39 40 /** 41 * hinic_be32_to_cpu - convert data from big endian 32 bit format 42 * @data: the data to convert 43 * @len: length of data to convert 44 **/ 45 void hinic_be32_to_cpu(void *data, int len) 46 { 47 u32 *mem = data; 48 int i; 49 50 len = len / sizeof(u32); 51 52 for (i = 0; i < len; i++) { 53 *mem = be32_to_cpu(*mem); 54 mem++; 55 } 56 } 57 58 /** 59 * hinic_set_sge - set dma area in scatter gather entry 60 * @sge: scatter gather entry 61 * @addr: dma address 62 * @len: length of relevant data in the dma address 63 **/ 64 void hinic_set_sge(struct hinic_sge *sge, dma_addr_t addr, int len) 65 { 66 sge->hi_addr = upper_32_bits(addr); 67 sge->lo_addr = lower_32_bits(addr); 68 sge->len = len; 69 } 70 71 /** 72 * hinic_sge_to_dma - get dma address from scatter gather entry 73 * @sge: scatter gather entry 74 * 75 * Return dma address of sg entry 76 **/ 77 dma_addr_t hinic_sge_to_dma(struct hinic_sge *sge) 78 { 79 return (dma_addr_t)((((u64)sge->hi_addr) << 32) | sge->lo_addr); 80 } 81