drivers/net/ethernet/huawei/hinic/hinic_common.c

   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 }