[patch net-next v2 02/19] mlxsw: item: Add helpers for getting pointer into payload for char buffer item
From: Jiri Pirko <jiri@resnulli.us>
Date: 2017-02-03 09:29:14
Subsystem:
mellanox ethernet switch drivers, networking drivers, the rest · Maintainers:
Ido Schimmel, Petr Machata, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Jiri Pirko <redacted> 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 <redacted> Reviewed-by: Ido Schimmel <redacted> --- drivers/net/ethernet/mellanox/mlxsw/item.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/item.h b/drivers/net/ethernet/mellanox/mlxsw/item.h
index 09f35de..28427f0 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/item.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/item.h@@ -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, \
--
2.7.4