2016-02-16 22:14:42 +08:00
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/*
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* drivers/net/ethernet/rocker/rocker_tlv.h - Rocker switch device driver
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* Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
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* Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef _ROCKER_TLV_H
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#define _ROCKER_TLV_H
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#include <linux/types.h>
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#include "rocker_hw.h"
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#include "rocker.h"
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#define ROCKER_TLV_ALIGNTO 8U
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#define ROCKER_TLV_ALIGN(len) \
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(((len) + ROCKER_TLV_ALIGNTO - 1) & ~(ROCKER_TLV_ALIGNTO - 1))
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#define ROCKER_TLV_HDRLEN ROCKER_TLV_ALIGN(sizeof(struct rocker_tlv))
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/* <------- ROCKER_TLV_HDRLEN -------> <--- ROCKER_TLV_ALIGN(payload) --->
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* +-----------------------------+- - -+- - - - - - - - - - - - - - -+- - -+
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* | Header | Pad | Payload | Pad |
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* | (struct rocker_tlv) | ing | | ing |
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* +-----------------------------+- - -+- - - - - - - - - - - - - - -+- - -+
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* <--------------------------- tlv->len -------------------------->
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*/
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static inline struct rocker_tlv *rocker_tlv_next(const struct rocker_tlv *tlv,
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int *remaining)
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{
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int totlen = ROCKER_TLV_ALIGN(tlv->len);
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*remaining -= totlen;
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return (struct rocker_tlv *) ((char *) tlv + totlen);
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}
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static inline int rocker_tlv_ok(const struct rocker_tlv *tlv, int remaining)
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{
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return remaining >= (int) ROCKER_TLV_HDRLEN &&
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tlv->len >= ROCKER_TLV_HDRLEN &&
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tlv->len <= remaining;
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}
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#define rocker_tlv_for_each(pos, head, len, rem) \
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for (pos = head, rem = len; \
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rocker_tlv_ok(pos, rem); \
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pos = rocker_tlv_next(pos, &(rem)))
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#define rocker_tlv_for_each_nested(pos, tlv, rem) \
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rocker_tlv_for_each(pos, rocker_tlv_data(tlv), \
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rocker_tlv_len(tlv), rem)
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static inline int rocker_tlv_attr_size(int payload)
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{
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return ROCKER_TLV_HDRLEN + payload;
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}
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static inline int rocker_tlv_total_size(int payload)
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{
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return ROCKER_TLV_ALIGN(rocker_tlv_attr_size(payload));
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}
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static inline int rocker_tlv_padlen(int payload)
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{
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return rocker_tlv_total_size(payload) - rocker_tlv_attr_size(payload);
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}
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static inline int rocker_tlv_type(const struct rocker_tlv *tlv)
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{
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return tlv->type;
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}
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static inline void *rocker_tlv_data(const struct rocker_tlv *tlv)
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{
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return (char *) tlv + ROCKER_TLV_HDRLEN;
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}
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static inline int rocker_tlv_len(const struct rocker_tlv *tlv)
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{
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return tlv->len - ROCKER_TLV_HDRLEN;
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}
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static inline u8 rocker_tlv_get_u8(const struct rocker_tlv *tlv)
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{
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return *(u8 *) rocker_tlv_data(tlv);
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}
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static inline u16 rocker_tlv_get_u16(const struct rocker_tlv *tlv)
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{
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return *(u16 *) rocker_tlv_data(tlv);
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}
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static inline __be16 rocker_tlv_get_be16(const struct rocker_tlv *tlv)
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{
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return *(__be16 *) rocker_tlv_data(tlv);
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}
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static inline u32 rocker_tlv_get_u32(const struct rocker_tlv *tlv)
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{
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return *(u32 *) rocker_tlv_data(tlv);
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}
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static inline u64 rocker_tlv_get_u64(const struct rocker_tlv *tlv)
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{
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return *(u64 *) rocker_tlv_data(tlv);
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}
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void rocker_tlv_parse(const struct rocker_tlv **tb, int maxtype,
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const char *buf, int buf_len);
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static inline void rocker_tlv_parse_nested(const struct rocker_tlv **tb,
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int maxtype,
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const struct rocker_tlv *tlv)
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{
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rocker_tlv_parse(tb, maxtype, rocker_tlv_data(tlv),
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rocker_tlv_len(tlv));
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}
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static inline void
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rocker_tlv_parse_desc(const struct rocker_tlv **tb, int maxtype,
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const struct rocker_desc_info *desc_info)
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{
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rocker_tlv_parse(tb, maxtype, desc_info->data,
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desc_info->desc->tlv_size);
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}
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static inline struct rocker_tlv *
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rocker_tlv_start(struct rocker_desc_info *desc_info)
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{
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return (struct rocker_tlv *) ((char *) desc_info->data +
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desc_info->tlv_size);
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}
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int rocker_tlv_put(struct rocker_desc_info *desc_info,
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int attrtype, int attrlen, const void *data);
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2017-09-23 05:29:18 +08:00
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static inline int
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rocker_tlv_put_u8(struct rocker_desc_info *desc_info, int attrtype, u8 value)
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2016-02-16 22:14:42 +08:00
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{
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2017-09-23 05:29:18 +08:00
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u8 tmp = value; /* work around GCC PR81715 */
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return rocker_tlv_put(desc_info, attrtype, sizeof(u8), &tmp);
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2016-02-16 22:14:42 +08:00
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}
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2017-09-23 05:29:18 +08:00
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static inline int
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rocker_tlv_put_u16(struct rocker_desc_info *desc_info, int attrtype, u16 value)
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2016-02-16 22:14:42 +08:00
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{
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2017-09-23 05:29:18 +08:00
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u16 tmp = value;
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return rocker_tlv_put(desc_info, attrtype, sizeof(u16), &tmp);
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2016-02-16 22:14:42 +08:00
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}
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2017-09-23 05:29:18 +08:00
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static inline int
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rocker_tlv_put_be16(struct rocker_desc_info *desc_info, int attrtype, __be16 value)
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2016-02-16 22:14:42 +08:00
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{
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2017-09-23 05:29:18 +08:00
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__be16 tmp = value;
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return rocker_tlv_put(desc_info, attrtype, sizeof(__be16), &tmp);
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2016-02-16 22:14:42 +08:00
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}
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2017-09-23 05:29:18 +08:00
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static inline int
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rocker_tlv_put_u32(struct rocker_desc_info *desc_info, int attrtype, u32 value)
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2016-02-16 22:14:42 +08:00
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{
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2017-09-23 05:29:18 +08:00
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u32 tmp = value;
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return rocker_tlv_put(desc_info, attrtype, sizeof(u32), &tmp);
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2016-02-16 22:14:42 +08:00
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}
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2017-09-23 05:29:18 +08:00
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static inline int
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rocker_tlv_put_be32(struct rocker_desc_info *desc_info, int attrtype, __be32 value)
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2016-02-16 22:14:42 +08:00
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{
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2017-09-23 05:29:18 +08:00
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__be32 tmp = value;
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return rocker_tlv_put(desc_info, attrtype, sizeof(__be32), &tmp);
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2016-02-16 22:14:42 +08:00
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}
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2017-09-23 05:29:18 +08:00
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static inline int
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rocker_tlv_put_u64(struct rocker_desc_info *desc_info, int attrtype, u64 value)
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2016-02-16 22:14:42 +08:00
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{
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2017-09-23 05:29:18 +08:00
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u64 tmp = value;
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return rocker_tlv_put(desc_info, attrtype, sizeof(u64), &tmp);
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2016-02-16 22:14:42 +08:00
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}
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static inline struct rocker_tlv *
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rocker_tlv_nest_start(struct rocker_desc_info *desc_info, int attrtype)
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{
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struct rocker_tlv *start = rocker_tlv_start(desc_info);
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if (rocker_tlv_put(desc_info, attrtype, 0, NULL) < 0)
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return NULL;
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return start;
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}
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static inline void rocker_tlv_nest_end(struct rocker_desc_info *desc_info,
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struct rocker_tlv *start)
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{
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start->len = (char *) rocker_tlv_start(desc_info) - (char *) start;
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}
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static inline void rocker_tlv_nest_cancel(struct rocker_desc_info *desc_info,
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const struct rocker_tlv *start)
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{
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desc_info->tlv_size = (const char *) start - desc_info->data;
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}
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#endif
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