442 lines
14 KiB
C
442 lines
14 KiB
C
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/*
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* drivers/net/ethernet/mellanox/mlxsw/item.h
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* Copyright (c) 2015 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
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* Copyright (c) 2015 Ido Schimmel <idosch@mellanox.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MLXSW_ITEM_H
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#define _MLXSW_ITEM_H
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/bitops.h>
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struct mlxsw_item {
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unsigned short offset; /* bytes in container */
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unsigned short step; /* step in bytes for indexed items */
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unsigned short in_step_offset; /* offset within one step */
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unsigned char shift; /* shift in bits */
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unsigned char element_size; /* size of element in bit array */
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bool no_real_shift;
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union {
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unsigned char bits;
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unsigned short bytes;
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} size;
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const char *name;
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};
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static inline unsigned int
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__mlxsw_item_offset(struct mlxsw_item *item, unsigned short index,
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size_t typesize)
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{
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BUG_ON(index && !item->step);
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if (item->offset % typesize != 0 ||
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item->step % typesize != 0 ||
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item->in_step_offset % typesize != 0) {
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pr_err("mlxsw: item bug (name=%s,offset=%x,step=%x,in_step_offset=%x,typesize=%zx)\n",
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item->name, item->offset, item->step,
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item->in_step_offset, typesize);
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BUG();
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}
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return ((item->offset + item->step * index + item->in_step_offset) /
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typesize);
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}
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static inline u16 __mlxsw_item_get16(char *buf, struct mlxsw_item *item,
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unsigned short index)
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{
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unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u16));
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__be16 *b = (__be16 *) buf;
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u16 tmp;
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tmp = be16_to_cpu(b[offset]);
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tmp >>= item->shift;
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tmp &= GENMASK(item->size.bits - 1, 0);
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if (item->no_real_shift)
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tmp <<= item->shift;
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return tmp;
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}
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static inline void __mlxsw_item_set16(char *buf, struct mlxsw_item *item,
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unsigned short index, u16 val)
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{
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unsigned int offset = __mlxsw_item_offset(item, index,
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sizeof(u16));
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__be16 *b = (__be16 *) buf;
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u16 mask = GENMASK(item->size.bits - 1, 0) << item->shift;
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u16 tmp;
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if (!item->no_real_shift)
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val <<= item->shift;
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val &= mask;
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tmp = be16_to_cpu(b[offset]);
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tmp &= ~mask;
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tmp |= val;
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b[offset] = cpu_to_be16(tmp);
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}
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static inline u32 __mlxsw_item_get32(char *buf, struct mlxsw_item *item,
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unsigned short index)
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{
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unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u32));
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__be32 *b = (__be32 *) buf;
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u32 tmp;
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tmp = be32_to_cpu(b[offset]);
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tmp >>= item->shift;
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tmp &= GENMASK(item->size.bits - 1, 0);
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if (item->no_real_shift)
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tmp <<= item->shift;
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return tmp;
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}
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static inline void __mlxsw_item_set32(char *buf, struct mlxsw_item *item,
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unsigned short index, u32 val)
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{
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unsigned int offset = __mlxsw_item_offset(item, index,
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sizeof(u32));
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__be32 *b = (__be32 *) buf;
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u32 mask = GENMASK(item->size.bits - 1, 0) << item->shift;
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u32 tmp;
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if (!item->no_real_shift)
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val <<= item->shift;
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val &= mask;
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tmp = be32_to_cpu(b[offset]);
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tmp &= ~mask;
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tmp |= val;
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b[offset] = cpu_to_be32(tmp);
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}
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static inline u64 __mlxsw_item_get64(char *buf, struct mlxsw_item *item,
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unsigned short index)
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{
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unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u64));
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__be64 *b = (__be64 *) buf;
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u64 tmp;
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tmp = be64_to_cpu(b[offset]);
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tmp >>= item->shift;
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tmp &= GENMASK_ULL(item->size.bits - 1, 0);
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if (item->no_real_shift)
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tmp <<= item->shift;
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return tmp;
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}
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static inline void __mlxsw_item_set64(char *buf, struct mlxsw_item *item,
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unsigned short index, u64 val)
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{
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unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u64));
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__be64 *b = (__be64 *) buf;
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u64 mask = GENMASK_ULL(item->size.bits - 1, 0) << item->shift;
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u64 tmp;
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if (!item->no_real_shift)
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val <<= item->shift;
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val &= mask;
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tmp = be64_to_cpu(b[offset]);
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tmp &= ~mask;
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tmp |= val;
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b[offset] = cpu_to_be64(tmp);
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}
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static inline void __mlxsw_item_memcpy_from(char *buf, char *dst,
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struct mlxsw_item *item,
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unsigned short index)
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{
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unsigned int offset = __mlxsw_item_offset(item, index, sizeof(char));
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memcpy(dst, &buf[offset], item->size.bytes);
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}
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static inline void __mlxsw_item_memcpy_to(char *buf, const char *src,
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struct mlxsw_item *item,
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unsigned short index)
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{
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unsigned int offset = __mlxsw_item_offset(item, index, sizeof(char));
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memcpy(&buf[offset], src, item->size.bytes);
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}
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static inline u16
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__mlxsw_item_bit_array_offset(struct mlxsw_item *item, u16 index, u8 *shift)
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{
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u16 max_index, be_index;
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u16 offset; /* byte offset inside the array */
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u8 in_byte_index;
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BUG_ON(index && !item->element_size);
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if (item->offset % sizeof(u32) != 0 ||
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BITS_PER_BYTE % item->element_size != 0) {
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pr_err("mlxsw: item bug (name=%s,offset=%x,element_size=%x)\n",
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item->name, item->offset, item->element_size);
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BUG();
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}
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max_index = (item->size.bytes << 3) / item->element_size - 1;
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be_index = max_index - index;
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offset = be_index * item->element_size >> 3;
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in_byte_index = index % (BITS_PER_BYTE / item->element_size);
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*shift = in_byte_index * item->element_size;
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return item->offset + offset;
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}
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static inline u8 __mlxsw_item_bit_array_get(char *buf, struct mlxsw_item *item,
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u16 index)
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{
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u8 shift, tmp;
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u16 offset = __mlxsw_item_bit_array_offset(item, index, &shift);
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tmp = buf[offset];
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tmp >>= shift;
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tmp &= GENMASK(item->element_size - 1, 0);
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return tmp;
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}
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static inline void __mlxsw_item_bit_array_set(char *buf, struct mlxsw_item *item,
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u16 index, u8 val)
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{
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u8 shift, tmp;
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u16 offset = __mlxsw_item_bit_array_offset(item, index, &shift);
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u8 mask = GENMASK(item->element_size - 1, 0) << shift;
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val <<= shift;
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val &= mask;
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tmp = buf[offset];
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tmp &= ~mask;
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tmp |= val;
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buf[offset] = tmp;
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}
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#define __ITEM_NAME(_type, _cname, _iname) \
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mlxsw_##_type##_##_cname##_##_iname##_item
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/* _type: cmd_mbox, reg, etc.
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* _cname: containter name (e.g. command name, register name)
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* _iname: item name within the container
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*/
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#define MLXSW_ITEM16(_type, _cname, _iname, _offset, _shift, _sizebits) \
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static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
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.offset = _offset, \
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.shift = _shift, \
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.size = {.bits = _sizebits,}, \
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.name = #_type "_" #_cname "_" #_iname, \
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}; \
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static inline u16 mlxsw_##_type##_##_cname##_##_iname##_get(char *buf) \
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{ \
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return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
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} \
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static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u16 val)\
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{ \
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__mlxsw_item_set16(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \
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}
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#define MLXSW_ITEM16_INDEXED(_type, _cname, _iname, _offset, _shift, _sizebits, \
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_step, _instepoffset, _norealshift) \
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static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
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.offset = _offset, \
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.step = _step, \
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.in_step_offset = _instepoffset, \
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.shift = _shift, \
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.no_real_shift = _norealshift, \
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.size = {.bits = _sizebits,}, \
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.name = #_type "_" #_cname "_" #_iname, \
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}; \
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static inline u16 \
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mlxsw_##_type##_##_cname##_##_iname##_get(char *buf, unsigned short index) \
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{ \
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return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname), \
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index); \
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} \
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static inline void \
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mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \
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u16 val) \
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{ \
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__mlxsw_item_set16(buf, &__ITEM_NAME(_type, _cname, _iname), \
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index, val); \
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}
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#define MLXSW_ITEM32(_type, _cname, _iname, _offset, _shift, _sizebits) \
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static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
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.offset = _offset, \
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.shift = _shift, \
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.size = {.bits = _sizebits,}, \
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.name = #_type "_" #_cname "_" #_iname, \
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}; \
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static inline u32 mlxsw_##_type##_##_cname##_##_iname##_get(char *buf) \
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{ \
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return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
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} \
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static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u32 val)\
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{ \
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__mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \
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}
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#define MLXSW_ITEM32_INDEXED(_type, _cname, _iname, _offset, _shift, _sizebits, \
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_step, _instepoffset, _norealshift) \
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static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
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.offset = _offset, \
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.step = _step, \
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.in_step_offset = _instepoffset, \
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.shift = _shift, \
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.no_real_shift = _norealshift, \
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.size = {.bits = _sizebits,}, \
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.name = #_type "_" #_cname "_" #_iname, \
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}; \
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static inline u32 \
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mlxsw_##_type##_##_cname##_##_iname##_get(char *buf, unsigned short index) \
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{ \
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return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname), \
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index); \
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} \
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static inline void \
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mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \
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u32 val) \
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{ \
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__mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, _iname), \
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index, val); \
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}
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#define MLXSW_ITEM64(_type, _cname, _iname, _offset, _shift, _sizebits) \
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static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
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.offset = _offset, \
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.shift = _shift, \
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.size = {.bits = _sizebits,}, \
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.name = #_type "_" #_cname "_" #_iname, \
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}; \
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static inline u64 mlxsw_##_type##_##_cname##_##_iname##_get(char *buf) \
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{ \
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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), 0); \
|
||
|
|
} \
|
||
|
|
static inline void \
|
||
|
|
mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf, const char *src) \
|
||
|
|
{ \
|
||
|
|
__mlxsw_item_memcpy_to(buf, src, \
|
||
|
|
&__ITEM_NAME(_type, _cname, _iname), 0); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define MLXSW_ITEM_BUF_INDEXED(_type, _cname, _iname, _offset, _sizebytes, \
|
||
|
|
_step, _instepoffset) \
|
||
|
|
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
|
||
|
|
.offset = _offset, \
|
||
|
|
.step = _step, \
|
||
|
|
.in_step_offset = _instepoffset, \
|
||
|
|
.size = {.bytes = _sizebytes,}, \
|
||
|
|
.name = #_type "_" #_cname "_" #_iname, \
|
||
|
|
}; \
|
||
|
|
static inline void \
|
||
|
|
mlxsw_##_type##_##_cname##_##_iname##_memcpy_from(char *buf, \
|
||
|
|
unsigned short index, \
|
||
|
|
char *dst) \
|
||
|
|
{ \
|
||
|
|
__mlxsw_item_memcpy_from(buf, dst, \
|
||
|
|
&__ITEM_NAME(_type, _cname, _iname), index); \
|
||
|
|
} \
|
||
|
|
static inline void \
|
||
|
|
mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf, \
|
||
|
|
unsigned short index, \
|
||
|
|
const char *src) \
|
||
|
|
{ \
|
||
|
|
__mlxsw_item_memcpy_to(buf, src, \
|
||
|
|
&__ITEM_NAME(_type, _cname, _iname), index); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#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
|