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mlxsw: item: Add helpers for getting pointer into payload for char buffer item 

Sometimes it is handy to get a pointer to a char buffer item and use it
direcly to write/read data. So add these helpers.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2017-02-03 10:28:52 +01:00 committed by David S. Miller
parent 2946fde9fd
commit d5e556c6a1
1 changed files with 19 additions and 0 deletions
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19
drivers/net/ethernet/mellanox/mlxsw/item.h
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@ -225,6 +225,14 @@ static inline void __mlxsw_item_memcpy_to(char *buf, const char *src,
memcpy(&buf[offset], src, item->size.bytes);
}
static inline char *__mlxsw_item_data(char *buf, const struct mlxsw_item *item,
unsigned short index)
{
unsigned int offset = __mlxsw_item_offset(item, index, sizeof(char));
return &buf[offset];
}
static inline u16
__mlxsw_item_bit_array_offset(const struct mlxsw_item *item,
u16 index, u8 *shift)
@ -468,6 +476,11 @@ mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf, const char *src) \
{ \
__mlxsw_item_memcpy_to(buf, src, \
&__ITEM_NAME(_type, _cname, _iname), 0); \
} \
static inline char * \
mlxsw_##_type##_##_cname##_##_iname##_data(char *buf) \
{ \
return __mlxsw_item_data(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
}
#define MLXSW_ITEM_BUF_INDEXED(_type, _cname, _iname, _offset, _sizebytes, \
@ -494,6 +507,12 @@ mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf, \
{ \
__mlxsw_item_memcpy_to(buf, src, \
&__ITEM_NAME(_type, _cname, _iname), index); \
} \
static inline char * \
mlxsw_##_type##_##_cname##_##_iname##_data(char *buf, unsigned short index) \
{ \
return __mlxsw_item_data(buf, \
&__ITEM_NAME(_type, _cname, _iname), index); \
}
#define MLXSW_ITEM_BIT_ARRAY(_type, _cname, _iname, _offset, _sizebytes, \