diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/item.h')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/item.h | 405 |
1 files changed, 405 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/item.h b/drivers/net/ethernet/mellanox/mlxsw/item.h new file mode 100644 index 000000000000..ffd55d030ce2 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlxsw/item.h @@ -0,0 +1,405 @@ +/* + * 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 Ido Schimmel <idosch@mellanox.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the names of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _MLXSW_ITEM_H +#define _MLXSW_ITEM_H + +#include <linux/types.h> +#include <linux/string.h> +#include <linux/bitops.h> + +struct mlxsw_item { + unsigned short offset; /* bytes in container */ + unsigned short step; /* step in bytes for indexed items */ + unsigned short in_step_offset; /* offset within one step */ + unsigned char shift; /* shift in bits */ + unsigned char element_size; /* size of element in bit array */ + bool no_real_shift; + union { + unsigned char bits; + unsigned short bytes; + } size; + const char *name; +}; + +static inline unsigned int +__mlxsw_item_offset(struct mlxsw_item *item, unsigned short index, + size_t typesize) +{ + BUG_ON(index && !item->step); + if (item->offset % typesize != 0 || + item->step % typesize != 0 || + item->in_step_offset % typesize != 0) { + pr_err("mlxsw: item bug (name=%s,offset=%x,step=%x,in_step_offset=%x,typesize=%zx)\n", + item->name, item->offset, item->step, + item->in_step_offset, typesize); + BUG(); + } + + return ((item->offset + item->step * index + item->in_step_offset) / + typesize); +} + +static inline u16 __mlxsw_item_get16(char *buf, struct mlxsw_item *item, + unsigned short index) +{ + unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u16)); + __be16 *b = (__be16 *) buf; + u16 tmp; + + tmp = be16_to_cpu(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_set16(char *buf, struct mlxsw_item *item, + unsigned short index, u16 val) +{ + unsigned int offset = __mlxsw_item_offset(item, index, + sizeof(u16)); + __be16 *b = (__be16 *) buf; + u16 mask = GENMASK(item->size.bits - 1, 0) << item->shift; + u16 tmp; + + if (!item->no_real_shift) + val <<= item->shift; + val &= mask; + tmp = be16_to_cpu(b[offset]); + tmp &= ~mask; + tmp |= val; + b[offset] = cpu_to_be16(tmp); +} + +static inline u32 __mlxsw_item_get32(char *buf, struct mlxsw_item *item, + unsigned short index) +{ + unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u32)); + __be32 *b = (__be32 *) buf; + u32 tmp; + + tmp = be32_to_cpu(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_set32(char *buf, struct mlxsw_item *item, + unsigned short index, u32 val) +{ + unsigned int offset = __mlxsw_item_offset(item, index, + sizeof(u32)); + __be32 *b = (__be32 *) buf; + u32 mask = GENMASK(item->size.bits - 1, 0) << item->shift; + u32 tmp; + + if (!item->no_real_shift) + val <<= item->shift; + val &= mask; + tmp = be32_to_cpu(b[offset]); + tmp &= ~mask; + tmp |= val; + b[offset] = cpu_to_be32(tmp); +} + +static inline u64 __mlxsw_item_get64(char *buf, struct mlxsw_item *item, + unsigned short index) +{ + unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u64)); + __be64 *b = (__be64 *) buf; + u64 tmp; + + tmp = be64_to_cpu(b[offset]); + tmp >>= item->shift; + tmp &= GENMASK_ULL(item->size.bits - 1, 0); + if (item->no_real_shift) + tmp <<= item->shift; + return tmp; +} + +static inline void __mlxsw_item_set64(char *buf, struct mlxsw_item *item, + unsigned short index, u64 val) +{ + unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u64)); + __be64 *b = (__be64 *) buf; + u64 mask = GENMASK_ULL(item->size.bits - 1, 0) << item->shift; + u64 tmp; + + if (!item->no_real_shift) + val <<= item->shift; + val &= mask; + tmp = be64_to_cpu(b[offset]); + tmp &= ~mask; + tmp |= val; + b[offset] = cpu_to_be64(tmp); +} + +static inline void __mlxsw_item_memcpy_from(char *buf, char *dst, + struct mlxsw_item *item) +{ + memcpy(dst, &buf[item->offset], item->size.bytes); +} + +static inline void __mlxsw_item_memcpy_to(char *buf, char *src, + struct mlxsw_item *item) +{ + memcpy(&buf[item->offset], src, item->size.bytes); +} + +static inline u16 +__mlxsw_item_bit_array_offset(struct mlxsw_item *item, u16 index, u8 *shift) +{ + u16 max_index, be_index; + u16 offset; /* byte offset inside the array */ + + BUG_ON(index && !item->element_size); + if (item->offset % sizeof(u32) != 0 || + BITS_PER_BYTE % item->element_size != 0) { + pr_err("mlxsw: item bug (name=%s,offset=%x,element_size=%x)\n", + item->name, item->offset, item->element_size); + BUG(); + } + + max_index = (item->size.bytes << 3) / item->element_size - 1; + be_index = max_index - index; + offset = be_index * item->element_size >> 3; + *shift = index % (BITS_PER_BYTE / item->element_size) << 1; + + return item->offset + offset; +} + +static inline u8 __mlxsw_item_bit_array_get(char *buf, struct mlxsw_item *item, + u16 index) +{ + u8 shift, tmp; + u16 offset = __mlxsw_item_bit_array_offset(item, index, &shift); + + tmp = buf[offset]; + tmp >>= shift; + tmp &= GENMASK(item->element_size - 1, 0); + return tmp; +} + +static inline void __mlxsw_item_bit_array_set(char *buf, struct mlxsw_item *item, + u16 index, u8 val) +{ + u8 shift, tmp; + u16 offset = __mlxsw_item_bit_array_offset(item, index, &shift); + u8 mask = GENMASK(item->element_size - 1, 0) << shift; + + val <<= shift; + val &= mask; + tmp = buf[offset]; + tmp &= ~mask; + tmp |= val; + buf[offset] = tmp; +} + +#define __ITEM_NAME(_type, _cname, _iname) \ + mlxsw_##_type##_##_cname##_##_iname##_item + +/* _type: cmd_mbox, reg, etc. + * _cname: containter name (e.g. command name, register name) + * _iname: item name within the container + */ + +#define MLXSW_ITEM16(_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 u16 mlxsw_##_type##_##_cname##_##_iname##_get(char *buf) \ +{ \ + return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \ +} \ +static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u16 val)\ +{ \ + __mlxsw_item_set16(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \ +} + +#define MLXSW_ITEM16_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 u16 \ +mlxsw_##_type##_##_cname##_##_iname##_get(char *buf, unsigned short index) \ +{ \ + return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname), \ + index); \ +} \ +static inline void \ +mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \ + u16 val) \ +{ \ + __mlxsw_item_set16(buf, &__ITEM_NAME(_type, _cname, _iname), \ + index, val); \ +} + +#define MLXSW_ITEM32(_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 u32 mlxsw_##_type##_##_cname##_##_iname##_get(char *buf) \ +{ \ + return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \ +} \ +static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u32 val)\ +{ \ + __mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \ +} + +#define MLXSW_ITEM32_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 u32 \ +mlxsw_##_type##_##_cname##_##_iname##_get(char *buf, unsigned short index) \ +{ \ + return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname), \ + index); \ +} \ +static inline void \ +mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \ + u32 val) \ +{ \ + __mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, _iname), \ + index, val); \ +} + +#define MLXSW_ITEM64(_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 u64 mlxsw_##_type##_##_cname##_##_iname##_get(char *buf) \ +{ \ + return __mlxsw_item_get64(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \ +} \ +static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u64 val)\ +{ \ + __mlxsw_item_set64(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \ +} + +#define MLXSW_ITEM64_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 u64 \ +mlxsw_##_type##_##_cname##_##_iname##_get(char *buf, unsigned short index) \ +{ \ + return __mlxsw_item_get64(buf, &__ITEM_NAME(_type, _cname, _iname), \ + index); \ +} \ +static inline void \ +mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \ + u64 val) \ +{ \ + __mlxsw_item_set64(buf, &__ITEM_NAME(_type, _cname, _iname), \ + index, val); \ +} + +#define MLXSW_ITEM_BUF(_type, _cname, _iname, _offset, _sizebytes) \ +static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \ + .offset = _offset, \ + .size = {.bytes = _sizebytes,}, \ + .name = #_type "_" #_cname "_" #_iname, \ +}; \ +static inline void \ +mlxsw_##_type##_##_cname##_##_iname##_memcpy_from(char *buf, char *dst) \ +{ \ + __mlxsw_item_memcpy_from(buf, dst, &__ITEM_NAME(_type, _cname, _iname));\ +} \ +static inline void \ +mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf, char *src) \ +{ \ + __mlxsw_item_memcpy_to(buf, src, &__ITEM_NAME(_type, _cname, _iname)); \ +} + +#define MLXSW_ITEM_BIT_ARRAY(_type, _cname, _iname, _offset, _sizebytes, \ + _element_size) \ +static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \ + .offset = _offset, \ + .element_size = _element_size, \ + .size = {.bytes = _sizebytes,}, \ + .name = #_type "_" #_cname "_" #_iname, \ +}; \ +static inline u8 \ +mlxsw_##_type##_##_cname##_##_iname##_get(char *buf, u16 index) \ +{ \ + return __mlxsw_item_bit_array_get(buf, \ + &__ITEM_NAME(_type, _cname, _iname), \ + index); \ +} \ +static inline void \ +mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u16 index, u8 val) \ +{ \ + return __mlxsw_item_bit_array_set(buf, \ + &__ITEM_NAME(_type, _cname, _iname), \ + index, val); \ +} \ + +#endif |