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 15 void 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 32 int 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