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Diffstat (limited to 'contrib/syslinux-4.02/gpxe/src/drivers/infiniband/mlx_bitops.h')
| -rw-r--r-- | contrib/syslinux-4.02/gpxe/src/drivers/infiniband/mlx_bitops.h | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/gpxe/src/drivers/infiniband/mlx_bitops.h b/contrib/syslinux-4.02/gpxe/src/drivers/infiniband/mlx_bitops.h new file mode 100644 index 0000000..71a9bf1 --- /dev/null +++ b/contrib/syslinux-4.02/gpxe/src/drivers/infiniband/mlx_bitops.h @@ -0,0 +1,223 @@ +#ifndef _MLX_BITOPS_H +#define _MLX_BITOPS_H + +/* + * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +/** + * @file + * + * Mellanox bit operations + * + */ + +/* Datatype used to represent a bit in the Mellanox autogenerated headers */ +typedef unsigned char pseudo_bit_t; + +/** + * Wrapper structure for pseudo_bit_t structures + * + * This structure provides a wrapper around the autogenerated + * pseudo_bit_t structures. It has the correct size, and also + * encapsulates type information about the underlying pseudo_bit_t + * structure, which allows the MLX_FILL etc. macros to work without + * requiring explicit type information. + */ +#define MLX_DECLARE_STRUCT( _structure ) \ + _structure { \ + union { \ + uint8_t bytes[ sizeof ( struct _structure ## _st ) / 8 ]; \ + uint32_t dwords[ sizeof ( struct _structure ## _st ) / 32 ]; \ + struct _structure ## _st *dummy[0]; \ + } u; \ + } + +/** Get pseudo_bit_t structure type from wrapper structure pointer */ +#define MLX_PSEUDO_STRUCT( _ptr ) \ + typeof ( *((_ptr)->u.dummy[0]) ) + +/** Bit offset of a field within a pseudo_bit_t structure */ +#define MLX_BIT_OFFSET( _structure_st, _field ) \ + offsetof ( _structure_st, _field ) + +/** Dword offset of a field within a pseudo_bit_t structure */ +#define MLX_DWORD_OFFSET( _structure_st, _field ) \ + ( MLX_BIT_OFFSET ( _structure_st, _field ) / 32 ) + +/** Dword bit offset of a field within a pseudo_bit_t structure + * + * Yes, using mod-32 would work, but would lose the check for the + * error of specifying a mismatched field name and dword index. + */ +#define MLX_DWORD_BIT_OFFSET( _structure_st, _index, _field ) \ + ( MLX_BIT_OFFSET ( _structure_st, _field ) - ( 32 * (_index) ) ) + +/** Bit width of a field within a pseudo_bit_t structure */ +#define MLX_BIT_WIDTH( _structure_st, _field ) \ + sizeof ( ( ( _structure_st * ) NULL )->_field ) + +/** Bit mask for a field within a pseudo_bit_t structure */ +#define MLX_BIT_MASK( _structure_st, _field ) \ + ( ( ~( ( uint32_t ) 0 ) ) >> \ + ( 32 - MLX_BIT_WIDTH ( _structure_st, _field ) ) ) + +/* + * Assemble native-endian dword from named fields and values + * + */ + +#define MLX_ASSEMBLE_1( _structure_st, _index, _field, _value ) \ + ( (_value) << MLX_DWORD_BIT_OFFSET ( _structure_st, _index, _field ) ) + +#define MLX_ASSEMBLE_2( _structure_st, _index, _field, _value, ... ) \ + ( MLX_ASSEMBLE_1 ( _structure_st, _index, _field, _value ) | \ + MLX_ASSEMBLE_1 ( _structure_st, _index, __VA_ARGS__ ) ) + +#define MLX_ASSEMBLE_3( _structure_st, _index, _field, _value, ... ) \ + ( MLX_ASSEMBLE_1 ( _structure_st, _index, _field, _value ) | \ + MLX_ASSEMBLE_2 ( _structure_st, _index, __VA_ARGS__ ) ) + +#define MLX_ASSEMBLE_4( _structure_st, _index, _field, _value, ... ) \ + ( MLX_ASSEMBLE_1 ( _structure_st, _index, _field, _value ) | \ + MLX_ASSEMBLE_3 ( _structure_st, _index, __VA_ARGS__ ) ) + +#define MLX_ASSEMBLE_5( _structure_st, _index, _field, _value, ... ) \ + ( MLX_ASSEMBLE_1 ( _structure_st, _index, _field, _value ) | \ + MLX_ASSEMBLE_4 ( _structure_st, _index, __VA_ARGS__ ) ) + +#define MLX_ASSEMBLE_6( _structure_st, _index, _field, _value, ... ) \ + ( MLX_ASSEMBLE_1 ( _structure_st, _index, _field, _value ) | \ + MLX_ASSEMBLE_5 ( _structure_st, _index, __VA_ARGS__ ) ) + +#define MLX_ASSEMBLE_7( _structure_st, _index, _field, _value, ... ) \ + ( MLX_ASSEMBLE_1 ( _structure_st, _index, _field, _value ) | \ + MLX_ASSEMBLE_6 ( _structure_st, _index, __VA_ARGS__ ) ) + +/* + * Build native-endian (positive) dword bitmasks from named fields + * + */ + +#define MLX_MASK_1( _structure_st, _index, _field ) \ + ( MLX_BIT_MASK ( _structure_st, _field ) << \ + MLX_DWORD_BIT_OFFSET ( _structure_st, _index, _field ) ) + +#define MLX_MASK_2( _structure_st, _index, _field, ... ) \ + ( MLX_MASK_1 ( _structure_st, _index, _field ) | \ + MLX_MASK_1 ( _structure_st, _index, __VA_ARGS__ ) ) + +#define MLX_MASK_3( _structure_st, _index, _field, ... ) \ + ( MLX_MASK_1 ( _structure_st, _index, _field ) | \ + MLX_MASK_2 ( _structure_st, _index, __VA_ARGS__ ) ) + +#define MLX_MASK_4( _structure_st, _index, _field, ... ) \ + ( MLX_MASK_1 ( _structure_st, _index, _field ) | \ + MLX_MASK_3 ( _structure_st, _index, __VA_ARGS__ ) ) + +#define MLX_MASK_5( _structure_st, _index, _field, ... ) \ + ( MLX_MASK_1 ( _structure_st, _index, _field ) | \ + MLX_MASK_4 ( _structure_st, _index, __VA_ARGS__ ) ) + +#define MLX_MASK_6( _structure_st, _index, _field, ... ) \ + ( MLX_MASK_1 ( _structure_st, _index, _field ) | \ + MLX_MASK_5 ( _structure_st, _index, __VA_ARGS__ ) ) + +#define MLX_MASK_7( _structure_st, _index, _field, ... ) \ + ( MLX_MASK_1 ( _structure_st, _index, _field ) | \ + MLX_MASK_6 ( _structure_st, _index, __VA_ARGS__ ) ) + +/* + * Populate big-endian dwords from named fields and values + * + */ + +#define MLX_FILL( _ptr, _index, _assembled ) \ + do { \ + uint32_t *__ptr = &(_ptr)->u.dwords[(_index)]; \ + uint32_t __assembled = (_assembled); \ + *__ptr = cpu_to_be32 ( __assembled ); \ + } while ( 0 ) + +#define MLX_FILL_1( _ptr, _index, ... ) \ + MLX_FILL ( _ptr, _index, MLX_ASSEMBLE_1 ( MLX_PSEUDO_STRUCT ( _ptr ),\ + _index, __VA_ARGS__ ) ) + +#define MLX_FILL_2( _ptr, _index, ... ) \ + MLX_FILL ( _ptr, _index, MLX_ASSEMBLE_2 ( MLX_PSEUDO_STRUCT ( _ptr ),\ + _index, __VA_ARGS__ ) ) + +#define MLX_FILL_3( _ptr, _index, ... ) \ + MLX_FILL ( _ptr, _index, MLX_ASSEMBLE_3 ( MLX_PSEUDO_STRUCT ( _ptr ),\ + _index, __VA_ARGS__ ) ) + +#define MLX_FILL_4( _ptr, _index, ... ) \ + MLX_FILL ( _ptr, _index, MLX_ASSEMBLE_4 ( MLX_PSEUDO_STRUCT ( _ptr ),\ + _index, __VA_ARGS__ ) ) + +#define MLX_FILL_5( _ptr, _index, ... ) \ + MLX_FILL ( _ptr, _index, MLX_ASSEMBLE_5 ( MLX_PSEUDO_STRUCT ( _ptr ),\ + _index, __VA_ARGS__ ) ) + +#define MLX_FILL_6( _ptr, _index, ... ) \ + MLX_FILL ( _ptr, _index, MLX_ASSEMBLE_6 ( MLX_PSEUDO_STRUCT ( _ptr ),\ + _index, __VA_ARGS__ ) ) + +#define MLX_FILL_7( _ptr, _index, ... ) \ + MLX_FILL ( _ptr, _index, MLX_ASSEMBLE_7 ( MLX_PSEUDO_STRUCT ( _ptr ),\ + _index, __VA_ARGS__ ) ) + +/* + * Modify big-endian dword using named field and value + * + */ + +#define MLX_SET( _ptr, _field, _value ) \ + do { \ + unsigned int __index = \ + MLX_DWORD_OFFSET ( MLX_PSEUDO_STRUCT ( _ptr ), _field ); \ + uint32_t *__ptr = &(_ptr)->u.dwords[__index]; \ + uint32_t __value = be32_to_cpu ( *__ptr ); \ + __value &= ~( MLX_MASK_1 ( MLX_PSEUDO_STRUCT ( _ptr ), \ + __index, _field ) ); \ + __value |= MLX_ASSEMBLE_1 ( MLX_PSEUDO_STRUCT ( _ptr ), \ + __index, _field, _value ); \ + *__ptr = cpu_to_be32 ( __value ); \ + } while ( 0 ) + +/* + * Extract value of named field + * + */ + +#define MLX_GET( _ptr, _field ) \ + ( { \ + unsigned int __index = \ + MLX_DWORD_OFFSET ( MLX_PSEUDO_STRUCT ( _ptr ), _field ); \ + uint32_t *__ptr = &(_ptr)->u.dwords[__index]; \ + uint32_t __value = be32_to_cpu ( *__ptr ); \ + __value >>= \ + MLX_DWORD_BIT_OFFSET ( MLX_PSEUDO_STRUCT ( _ptr ), \ + __index, _field ); \ + __value &= \ + MLX_BIT_MASK ( MLX_PSEUDO_STRUCT ( _ptr ), _field ); \ + __value; \ + } ) + +#endif /* _MLX_BITOPS_H */ |