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path: root/drivers/net/ethernet/huawei/hinic/hinic_common.c
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Diffstat (limited to 'drivers/net/ethernet/huawei/hinic/hinic_common.c')
-rw-r--r--drivers/net/ethernet/huawei/hinic/hinic_common.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_common.c b/drivers/net/ethernet/huawei/hinic/hinic_common.c
new file mode 100644
index 000000000000..02c74fd8380e
--- /dev/null
+++ b/drivers/net/ethernet/huawei/hinic/hinic_common.c
@@ -0,0 +1,80 @@
+/*
+ * Huawei HiNIC PCI Express Linux driver
+ * Copyright(c) 2017 Huawei Technologies Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+#include "hinic_common.h"
+
+/**
+ * hinic_cpu_to_be32 - convert data to big endian 32 bit format
+ * @data: the data to convert
+ * @len: length of data to convert
+ **/
+void hinic_cpu_to_be32(void *data, int len)
+{
+ u32 *mem = data;
+ int i;
+
+ len = len / sizeof(u32);
+
+ for (i = 0; i < len; i++) {
+ *mem = cpu_to_be32(*mem);
+ mem++;
+ }
+}
+
+/**
+ * hinic_be32_to_cpu - convert data from big endian 32 bit format
+ * @data: the data to convert
+ * @len: length of data to convert
+ **/
+void hinic_be32_to_cpu(void *data, int len)
+{
+ u32 *mem = data;
+ int i;
+
+ len = len / sizeof(u32);
+
+ for (i = 0; i < len; i++) {
+ *mem = be32_to_cpu(*mem);
+ mem++;
+ }
+}
+
+/**
+ * hinic_set_sge - set dma area in scatter gather entry
+ * @sge: scatter gather entry
+ * @addr: dma address
+ * @len: length of relevant data in the dma address
+ **/
+void hinic_set_sge(struct hinic_sge *sge, dma_addr_t addr, int len)
+{
+ sge->hi_addr = upper_32_bits(addr);
+ sge->lo_addr = lower_32_bits(addr);
+ sge->len = len;
+}
+
+/**
+ * hinic_sge_to_dma - get dma address from scatter gather entry
+ * @sge: scatter gather entry
+ *
+ * Return dma address of sg entry
+ **/
+dma_addr_t hinic_sge_to_dma(struct hinic_sge *sge)
+{
+ return (dma_addr_t)((((u64)sge->hi_addr) << 32) | sge->lo_addr);
+}