nx_bitops.h File Reference

NetXen bit operations. More...

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Defines

#define NX_PSEUDO_BIT_STRUCT(_structure)
 Wrapper structure for pseudo_bit_t structures.
#define NX_PSEUDO_STRUCT(_ptr)   typeof ( *((_ptr)->u.dummy[0]) )
 Get pseudo_bit_t structure type from wrapper structure pointer.
#define NX_BIT_OFFSET(_ptr, _field)   offsetof ( NX_PSEUDO_STRUCT ( _ptr ), _field )
 Bit offset of a field within a pseudo_bit_t structure.
#define NX_BIT_WIDTH(_ptr, _field)   sizeof ( ( ( NX_PSEUDO_STRUCT ( _ptr ) * ) NULL )->_field )
 Bit width of a field within a pseudo_bit_t structure.
#define NX_QWORD_OFFSET(_ptr, _field)   ( NX_BIT_OFFSET ( _ptr, _field ) / 64 )
 Qword offset of a field within a pseudo_bit_t structure.
#define NX_QWORD_BIT_OFFSET(_ptr, _index, _field)   ( NX_BIT_OFFSET ( _ptr, _field ) - ( 64 * (_index) ) )
 Qword bit offset of a field within a pseudo_bit_t structure.
#define NX_BIT_MASK(_ptr, _field)
 Bit mask for a field within a pseudo_bit_t structure.
#define NX_ASSEMBLE_1(_ptr, _index, _field, _value)
#define NX_ASSEMBLE_2(_ptr, _index, _field, _value,...)
#define NX_ASSEMBLE_3(_ptr, _index, _field, _value,...)
#define NX_ASSEMBLE_4(_ptr, _index, _field, _value,...)
#define NX_ASSEMBLE_5(_ptr, _index, _field, _value,...)
#define NX_ASSEMBLE_6(_ptr, _index, _field, _value,...)
#define NX_ASSEMBLE_7(_ptr, _index, _field, _value,...)
#define NX_MASK_1(_ptr, _index, _field)
#define NX_MASK_2(_ptr, _index, _field,...)
#define NX_MASK_3(_ptr, _index, _field,...)
#define NX_MASK_4(_ptr, _index, _field,...)
#define NX_MASK_5(_ptr, _index, _field,...)
#define NX_MASK_6(_ptr, _index, _field,...)
#define NX_MASK_7(_ptr, _index, _field,...)
#define NX_FILL(_ptr, _index, _assembled)
#define NX_FILL_1(_ptr, _index,...)   NX_FILL ( _ptr, _index, NX_ASSEMBLE_1 ( _ptr, _index, __VA_ARGS__ ) )
#define NX_FILL_2(_ptr, _index,...)   NX_FILL ( _ptr, _index, NX_ASSEMBLE_2 ( _ptr, _index, __VA_ARGS__ ) )
#define NX_FILL_3(_ptr, _index,...)   NX_FILL ( _ptr, _index, NX_ASSEMBLE_3 ( _ptr, _index, __VA_ARGS__ ) )
#define NX_FILL_4(_ptr, _index,...)   NX_FILL ( _ptr, _index, NX_ASSEMBLE_4 ( _ptr, _index, __VA_ARGS__ ) )
#define NX_FILL_5(_ptr, _index,...)   NX_FILL ( _ptr, _index, NX_ASSEMBLE_5 ( _ptr, _index, __VA_ARGS__ ) )
#define NX_FILL_6(_ptr, _index,...)   NX_FILL ( _ptr, _index, NX_ASSEMBLE_6 ( _ptr, _index, __VA_ARGS__ ) )
#define NX_FILL_7(_ptr, _index,...)   NX_FILL ( _ptr, _index, NX_ASSEMBLE_7 ( _ptr, _index, __VA_ARGS__ ) )
#define NX_GET64(_ptr, _field)
 Extract value of named field.
#define NX_GET(_ptr, _field)   ( ( unsigned long ) NX_GET64 ( _ptr, _field ) )
 Extract value of named field (for fields up to the size of a long).

Typedefs

typedef unsigned char pseudo_bit_t
 Datatype used to represent a bit in the pseudo-structures.

Functions

 FILE_LICENCE (GPL2_OR_LATER)

Detailed Description

NetXen bit operations.

Definition in file nx_bitops.h.

Define Documentation

#define NX_PSEUDO_BIT_STRUCT ( _structure   ) 

Value:

union {                                                              \
                uint8_t bytes[ sizeof ( _structure ) / 8 ];                  \
                uint64_t qwords[ sizeof ( _structure ) / 64 ];               \
                _structure *dummy[0];                                        \
        } u;
Wrapper structure for pseudo_bit_t structures.

This structure provides a wrapper around pseudo_bit_t structures. It has the correct size, and also encapsulates type information about the underlying pseudo_bit_t-based structure, which allows the NX_FILL etc. macros to work without requiring explicit type information.

Definition at line 43 of file nx_bitops.h.

#define NX_PSEUDO_STRUCT ( _ptr   )     typeof ( *((_ptr)->u.dummy[0]) )

Get pseudo_bit_t structure type from wrapper structure pointer.

Definition at line 51 of file nx_bitops.h.

#define NX_BIT_OFFSET ( _ptr,
_field   )     offsetof ( NX_PSEUDO_STRUCT ( _ptr ), _field )

Bit offset of a field within a pseudo_bit_t structure.

Definition at line 55 of file nx_bitops.h.

#define NX_BIT_WIDTH ( _ptr,
_field   )     sizeof ( ( ( NX_PSEUDO_STRUCT ( _ptr ) * ) NULL )->_field )

Bit width of a field within a pseudo_bit_t structure.

Definition at line 59 of file nx_bitops.h.

#define NX_QWORD_OFFSET ( _ptr,
_field   )     ( NX_BIT_OFFSET ( _ptr, _field ) / 64 )

Qword offset of a field within a pseudo_bit_t structure.

Definition at line 63 of file nx_bitops.h.

#define NX_QWORD_BIT_OFFSET ( _ptr,
_index,
_field   )     ( NX_BIT_OFFSET ( _ptr, _field ) - ( 64 * (_index) ) )

Qword bit offset of a field within a pseudo_bit_t structure.

Yes, using mod-64 would work, but would lose the check for the error of specifying a mismatched field name and qword index.

Definition at line 71 of file nx_bitops.h.

#define NX_BIT_MASK ( _ptr,
_field   ) 

Value:

( ( ~( ( uint64_t ) 0 ) ) >>                                         \
          ( 64 - NX_BIT_WIDTH ( _ptr, _field ) ) )
Bit mask for a field within a pseudo_bit_t structure.

Definition at line 75 of file nx_bitops.h.

#define NX_ASSEMBLE_1 ( _ptr,
_index,
_field,
_value   ) 

Value:

( ( ( uint64_t) (_value) ) <<                                        \
          NX_QWORD_BIT_OFFSET ( _ptr, _index, _field ) )

Definition at line 84 of file nx_bitops.h.

#define NX_ASSEMBLE_2 ( _ptr,
_index,
_field,
_value,
...   ) 

Value:

( NX_ASSEMBLE_1 ( _ptr, _index, _field, _value ) |                   \
          NX_ASSEMBLE_1 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 88 of file nx_bitops.h.

#define NX_ASSEMBLE_3 ( _ptr,
_index,
_field,
_value,
...   ) 

Value:

( NX_ASSEMBLE_1 ( _ptr, _index, _field, _value ) |                   \
          NX_ASSEMBLE_2 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 92 of file nx_bitops.h.

#define NX_ASSEMBLE_4 ( _ptr,
_index,
_field,
_value,
...   ) 

Value:

( NX_ASSEMBLE_1 ( _ptr, _index, _field, _value ) |                   \
          NX_ASSEMBLE_3 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 96 of file nx_bitops.h.

#define NX_ASSEMBLE_5 ( _ptr,
_index,
_field,
_value,
...   ) 

Value:

( NX_ASSEMBLE_1 ( _ptr, _index, _field, _value ) |                   \
          NX_ASSEMBLE_4 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 100 of file nx_bitops.h.

#define NX_ASSEMBLE_6 ( _ptr,
_index,
_field,
_value,
...   ) 

Value:

( NX_ASSEMBLE_1 ( _ptr, _index, _field, _value ) |                   \
          NX_ASSEMBLE_5 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 104 of file nx_bitops.h.

#define NX_ASSEMBLE_7 ( _ptr,
_index,
_field,
_value,
...   ) 

Value:

( NX_ASSEMBLE_1 ( _ptr, _index, _field, _value ) |                   \
          NX_ASSEMBLE_6 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 108 of file nx_bitops.h.

#define NX_MASK_1 ( _ptr,
_index,
_field   ) 

Value:

( NX_BIT_MASK ( _ptr, _field ) <<                            \
          NX_QWORD_BIT_OFFSET ( _ptr, _index, _field ) )

Definition at line 117 of file nx_bitops.h.

#define NX_MASK_2 ( _ptr,
_index,
_field,
...   ) 

Value:

( NX_MASK_1 ( _ptr, _index, _field ) |                       \
          NX_MASK_1 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 121 of file nx_bitops.h.

#define NX_MASK_3 ( _ptr,
_index,
_field,
...   ) 

Value:

( NX_MASK_1 ( _ptr, _index, _field ) |                       \
          NX_MASK_2 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 125 of file nx_bitops.h.

#define NX_MASK_4 ( _ptr,
_index,
_field,
...   ) 

Value:

( NX_MASK_1 ( _ptr, _index, _field ) |                       \
          NX_MASK_3 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 129 of file nx_bitops.h.

#define NX_MASK_5 ( _ptr,
_index,
_field,
...   ) 

Value:

( NX_MASK_1 ( _ptr, _index, _field ) |                       \
          NX_MASK_4 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 133 of file nx_bitops.h.

#define NX_MASK_6 ( _ptr,
_index,
_field,
...   ) 

Value:

( NX_MASK_1 ( _ptr, _index, _field ) |                       \
          NX_MASK_5 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 137 of file nx_bitops.h.

#define NX_MASK_7 ( _ptr,
_index,
_field,
...   ) 

Value:

( NX_MASK_1 ( _ptr, _index, _field ) |                       \
          NX_MASK_6 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 141 of file nx_bitops.h.

#define NX_FILL ( _ptr,
_index,
_assembled   ) 

Value:

do {                                                                 \
                uint64_t *__ptr = &(_ptr)->u.qwords[(_index)];               \
                uint64_t __assembled = (_assembled);                         \
                *__ptr = cpu_to_le64 ( __assembled );                        \
        } while ( 0 )

Definition at line 150 of file nx_bitops.h.

#define NX_FILL_1 ( _ptr,
_index,
...   )     NX_FILL ( _ptr, _index, NX_ASSEMBLE_1 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 157 of file nx_bitops.h.

Referenced by phantom_refill_rx_ring(), phantom_transmit(), and phantom_update_macaddr().

#define NX_FILL_2 ( _ptr,
_index,
...   )     NX_FILL ( _ptr, _index, NX_ASSEMBLE_2 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 160 of file nx_bitops.h.

Referenced by phantom_refill_rx_ring(), phantom_transmit(), and phantom_update_macaddr().

#define NX_FILL_3 ( _ptr,
_index,
...   )     NX_FILL ( _ptr, _index, NX_ASSEMBLE_3 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 163 of file nx_bitops.h.

Referenced by phantom_transmit().

#define NX_FILL_4 ( _ptr,
_index,
...   )     NX_FILL ( _ptr, _index, NX_ASSEMBLE_4 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 166 of file nx_bitops.h.

#define NX_FILL_5 ( _ptr,
_index,
...   )     NX_FILL ( _ptr, _index, NX_ASSEMBLE_5 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 169 of file nx_bitops.h.

#define NX_FILL_6 ( _ptr,
_index,
...   )     NX_FILL ( _ptr, _index, NX_ASSEMBLE_6 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 172 of file nx_bitops.h.

#define NX_FILL_7 ( _ptr,
_index,
...   )     NX_FILL ( _ptr, _index, NX_ASSEMBLE_7 ( _ptr, _index, __VA_ARGS__ ) )

Definition at line 175 of file nx_bitops.h.

Referenced by phantom_update_macaddr().

#define NX_GET64 ( _ptr,
_field   ) 

Value:

( {                                                                  \
                unsigned int __index = NX_QWORD_OFFSET ( _ptr, _field );     \
                uint64_t *__ptr = &(_ptr)->u.qwords[__index];                \
                uint64_t __value = le64_to_cpu ( *__ptr );                   \
                __value >>=                                                  \
                    NX_QWORD_BIT_OFFSET ( _ptr, __index, _field );           \
                __value &= NX_BIT_MASK ( _ptr, _field );                     \
                __value;                                                     \
        } )
Extract value of named field.

Definition at line 179 of file nx_bitops.h.

#define NX_GET ( _ptr,
_field   )     ( ( unsigned long ) NX_GET64 ( _ptr, _field ) )

Extract value of named field (for fields up to the size of a long).

Definition at line 191 of file nx_bitops.h.

Referenced by phantom_poll(), and phantom_post_rds().

Typedef Documentation

typedef unsigned char pseudo_bit_t

Datatype used to represent a bit in the pseudo-structures.

Definition at line 32 of file nx_bitops.h.

Function Documentation

FILE_LICENCE ( GPL2_OR_LATER   ) 

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