LXR linux/drivers/net/ethernet/rocker/rocker

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * drivers/net/ethernet/rocker/rocker_tlv.c - Rocker switch device driver
   4 * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
   5 * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
   6 */
   7
   8#include <linux/types.h>
   9#include <linux/string.h>
  10#include <linux/errno.h>
  11
  12#include "rocker_hw.h"
  13#include "rocker_tlv.h"
  14
  15void rocker_tlv_parse(const struct rocker_tlv **tb, int maxtype,
  16                      const char *buf, int buf_len)
  17{
  18        const struct rocker_tlv *tlv;
  19        const struct rocker_tlv *head = (const struct rocker_tlv *) buf;
  20        int rem;
  21
  22        memset(tb, 0, sizeof(struct rocker_tlv *) * (maxtype + 1));
  23
  24        rocker_tlv_for_each(tlv, head, buf_len, rem) {
  25                u32 type = rocker_tlv_type(tlv);
  26
  27                if (type > 0 && type <= maxtype)
  28                        tb[type] = tlv;
  29        }
  30}
  31
  32int rocker_tlv_put(struct rocker_desc_info *desc_info,
  33                   int attrtype, int attrlen, const void *data)
  34{
  35        int tail_room = desc_info->data_size - desc_info->tlv_size;
  36        int total_size = rocker_tlv_total_size(attrlen);
  37        struct rocker_tlv *tlv;
  38
  39        if (unlikely(tail_room < total_size))
  40                return -EMSGSIZE;
  41
  42        tlv = rocker_tlv_start(desc_info);
  43        desc_info->tlv_size += total_size;
  44        tlv->type = attrtype;
  45        tlv->len = rocker_tlv_attr_size(attrlen);
  46        memcpy(rocker_tlv_data(tlv), data, attrlen);
  47        memset((char *) tlv + tlv->len, 0, rocker_tlv_padlen(attrlen));
  48        return 0;
  49}
  50