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mlxsw: item: Add 8bit item helpers

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Item heplers for 8bit values are needed, let's add them.

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 10:28:51 +01:00 committed by David S. Miller
parent 3d67576da1
commit 2946fde9fd
1 changed files with 77 additions and 2 deletions
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79
drivers/net/ethernet/mellanox/mlxsw/item.h
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@ -1,7 +1,7 @@
/*
* drivers/net/ethernet/mellanox/mlxsw/item.h
* Copyright (c) 2015 Mellanox Technologies. All rights reserved.
* Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
* Copyright (c) 2015-2017 Mellanox Technologies. All rights reserved.
* Copyright (c) 2015-2017 Jiri Pirko <jiri@mellanox.com>
* Copyright (c) 2015 Ido Schimmel <idosch@mellanox.com>
*
* Redistribution and use in source and binary forms, with or without
@ -72,6 +72,40 @@ __mlxsw_item_offset(const struct mlxsw_item *item, unsigned short index,
typesize);
}
static inline u8 __mlxsw_item_get8(const char *buf,
const struct mlxsw_item *item,
unsigned short index)
{
unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u8));
u8 *b = (u8 *) buf;
u8 tmp;
tmp = b[offset];
tmp >>= item->shift;
tmp &= GENMASK(item->size.bits - 1, 0);
if (item->no_real_shift)
tmp <<= item->shift;
return tmp;
}
static inline void __mlxsw_item_set8(char *buf, const struct mlxsw_item *item,
unsigned short index, u8 val)
{
unsigned int offset = __mlxsw_item_offset(item, index,
sizeof(u8));
u8 *b = (u8 *) buf;
u8 mask = GENMASK(item->size.bits - 1, 0) << item->shift;
u8 tmp;
if (!item->no_real_shift)
val <<= item->shift;
val &= mask;
tmp = b[offset];
tmp &= ~mask;
tmp |= val;
b[offset] = tmp;
}
static inline u16 __mlxsw_item_get16(const char *buf,
const struct mlxsw_item *item,
unsigned short index)
@ -253,6 +287,47 @@ static inline void __mlxsw_item_bit_array_set(char *buf,
* _iname: item name within the container
*/
#define MLXSW_ITEM8(_type, _cname, _iname, _offset, _shift, _sizebits) \
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
.offset = _offset, \
.shift = _shift, \
.size = {.bits = _sizebits,}, \
.name = #_type "_" #_cname "_" #_iname, \
}; \
static inline u8 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \
{ \
return __mlxsw_item_get8(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
} \
static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u8 val)\
{ \
__mlxsw_item_set8(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \
}
#define MLXSW_ITEM8_INDEXED(_type, _cname, _iname, _offset, _shift, _sizebits, \
_step, _instepoffset, _norealshift) \
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
.offset = _offset, \
.step = _step, \
.in_step_offset = _instepoffset, \
.shift = _shift, \
.no_real_shift = _norealshift, \
.size = {.bits = _sizebits,}, \
.name = #_type "_" #_cname "_" #_iname, \
}; \
static inline u8 \
mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
{ \
return __mlxsw_item_get8(buf, &__ITEM_NAME(_type, _cname, _iname), \
index); \
} \
static inline void \
mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \
u8 val) \
{ \
__mlxsw_item_set8(buf, &__ITEM_NAME(_type, _cname, _iname), \
index, val); \
}
#define MLXSW_ITEM16(_type, _cname, _iname, _offset, _shift, _sizebits) \
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
.offset = _offset, \