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Commit d5e556c6 authored by Jiri Pirko's avatar Jiri Pirko Committed by David S. Miller
Browse files

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: default avatarJiri Pirko <jiri@mellanox.com>
Reviewed-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2946fde9

drivers/net/ethernet/mellanox/mlxsw/item.h

+19 −0
Original line number Diff line number Diff line
@@ -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,	\