1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Huawei HiNIC PCI Express Linux driver 4 * Copyright(c) 2017 Huawei Technologies Co., Ltd 5 */ 6 7 #include <linux/kernel.h> 8 #include <linux/types.h> 9 #include <asm/byteorder.h> 10 11 #include "hinic_common.h" 12 13 /** 14 * hinic_cpu_to_be32 - convert data to big endian 32 bit format 15 * @data: the data to convert 16 * @len: length of data to convert 17 **/ 18 void hinic_cpu_to_be32(void *data, int len) 19 { 20 u32 *mem = data; 21 int i; 22 23 len = len / sizeof(u32); 24 25 for (i = 0; i < len; i++) { 26 *mem = cpu_to_be32(*mem); 27 mem++; 28 } 29 } 30 31 /** 32 * hinic_be32_to_cpu - convert data from big endian 32 bit format 33 * @data: the data to convert 34 * @len: length of data to convert 35 **/ 36 void hinic_be32_to_cpu(void *data, int len) 37 { 38 u32 *mem = data; 39 int i; 40 41 len = len / sizeof(u32); 42 43 for (i = 0; i < len; i++) { 44 *mem = be32_to_cpu(*mem); 45 mem++; 46 } 47 } 48 49 /** 50 * hinic_set_sge - set dma area in scatter gather entry 51 * @sge: scatter gather entry 52 * @addr: dma address 53 * @len: length of relevant data in the dma address 54 **/ 55 void hinic_set_sge(struct hinic_sge *sge, dma_addr_t addr, int len) 56 { 57 sge->hi_addr = upper_32_bits(addr); 58 sge->lo_addr = lower_32_bits(addr); 59 sge->len = len; 60 } 61 62 /** 63 * hinic_sge_to_dma - get dma address from scatter gather entry 64 * @sge: scatter gather entry 65 * 66 * Return dma address of sg entry 67 **/ 68 dma_addr_t hinic_sge_to_dma(struct hinic_sge *sge) 69 { 70 return (dma_addr_t)((((u64)sge->hi_addr) << 32) | sge->lo_addr); 71 } 72