1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
#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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, 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]; \
} __attribute__ (( packed )) u; \
} __attribute__ (( packed ))
/** 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__ ) )
#define MLX_ASSEMBLE_8( _structure_st, _index, _field, _value, ... ) \
( MLX_ASSEMBLE_1 ( _structure_st, _index, _field, _value ) | \
MLX_ASSEMBLE_7 ( _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__ ) )
#define MLX_MASK_8( _structure_st, _index, _field, ... ) \
( MLX_MASK_1 ( _structure_st, _index, _field ) | \
MLX_MASK_7 ( _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__ ) )
#define MLX_FILL_8( _ptr, _index, ... ) \
MLX_FILL ( _ptr, _index, MLX_ASSEMBLE_8 ( 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; \
} )
/*
* Fill high dword of physical address, if necessary
*
*/
#define MLX_FILL_H( _structure_st, _index, _field, _address ) do { \
if ( sizeof ( physaddr_t ) > sizeof ( uint32_t ) ) { \
MLX_FILL_1 ( _structure_st, _index, _field, \
( ( ( uint64_t ) (_address) ) >> 32 ) ); \
} } while ( 0 )
#endif /* _MLX_BITOPS_H */
|
