forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
146 lines
5.5 KiB
146 lines
5.5 KiB
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ |
|
/* |
|
* Copyright (c) 2020, Mellanox Technologies inc. All rights reserved. |
|
*/ |
|
#ifndef _IBA_DEFS_H_ |
|
#define _IBA_DEFS_H_ |
|
|
|
#include <linux/kernel.h> |
|
#include <linux/bitfield.h> |
|
#include <asm/unaligned.h> |
|
|
|
static inline u32 _iba_get8(const u8 *ptr) |
|
{ |
|
return *ptr; |
|
} |
|
|
|
static inline void _iba_set8(u8 *ptr, u32 mask, u32 prep_value) |
|
{ |
|
*ptr = (*ptr & ~mask) | prep_value; |
|
} |
|
|
|
static inline u16 _iba_get16(const __be16 *ptr) |
|
{ |
|
return be16_to_cpu(*ptr); |
|
} |
|
|
|
static inline void _iba_set16(__be16 *ptr, u16 mask, u16 prep_value) |
|
{ |
|
*ptr = cpu_to_be16((be16_to_cpu(*ptr) & ~mask) | prep_value); |
|
} |
|
|
|
static inline u32 _iba_get32(const __be32 *ptr) |
|
{ |
|
return be32_to_cpu(*ptr); |
|
} |
|
|
|
static inline void _iba_set32(__be32 *ptr, u32 mask, u32 prep_value) |
|
{ |
|
*ptr = cpu_to_be32((be32_to_cpu(*ptr) & ~mask) | prep_value); |
|
} |
|
|
|
static inline u64 _iba_get64(const __be64 *ptr) |
|
{ |
|
/* |
|
* The mads are constructed so that 32 bit and smaller are naturally |
|
* aligned, everything larger has a max alignment of 4 bytes. |
|
*/ |
|
return be64_to_cpu(get_unaligned(ptr)); |
|
} |
|
|
|
static inline void _iba_set64(__be64 *ptr, u64 mask, u64 prep_value) |
|
{ |
|
put_unaligned(cpu_to_be64((_iba_get64(ptr) & ~mask) | prep_value), ptr); |
|
} |
|
|
|
#define _IBA_SET(field_struct, field_offset, field_mask, num_bits, ptr, value) \ |
|
({ \ |
|
field_struct *_ptr = ptr; \ |
|
_iba_set##num_bits((void *)_ptr + (field_offset), field_mask, \ |
|
FIELD_PREP(field_mask, value)); \ |
|
}) |
|
#define IBA_SET(field, ptr, value) _IBA_SET(field, ptr, value) |
|
|
|
#define _IBA_GET_MEM_PTR(field_struct, field_offset, type, num_bits, ptr) \ |
|
({ \ |
|
field_struct *_ptr = ptr; \ |
|
(type *)((void *)_ptr + (field_offset)); \ |
|
}) |
|
#define IBA_GET_MEM_PTR(field, ptr) _IBA_GET_MEM_PTR(field, ptr) |
|
|
|
/* FIXME: A set should always set the entire field, meaning we should zero the trailing bytes */ |
|
#define _IBA_SET_MEM(field_struct, field_offset, type, num_bits, ptr, in, \ |
|
bytes) \ |
|
({ \ |
|
const type *_in_ptr = in; \ |
|
WARN_ON(bytes * 8 > num_bits); \ |
|
if (in && bytes) \ |
|
memcpy(_IBA_GET_MEM_PTR(field_struct, field_offset, \ |
|
type, num_bits, ptr), \ |
|
_in_ptr, bytes); \ |
|
}) |
|
#define IBA_SET_MEM(field, ptr, in, bytes) _IBA_SET_MEM(field, ptr, in, bytes) |
|
|
|
#define _IBA_GET(field_struct, field_offset, field_mask, num_bits, ptr) \ |
|
({ \ |
|
const field_struct *_ptr = ptr; \ |
|
(u##num_bits) FIELD_GET( \ |
|
field_mask, _iba_get##num_bits((const void *)_ptr + \ |
|
(field_offset))); \ |
|
}) |
|
#define IBA_GET(field, ptr) _IBA_GET(field, ptr) |
|
|
|
#define _IBA_GET_MEM(field_struct, field_offset, type, num_bits, ptr, out, \ |
|
bytes) \ |
|
({ \ |
|
type *_out_ptr = out; \ |
|
WARN_ON(bytes * 8 > num_bits); \ |
|
if (out && bytes) \ |
|
memcpy(_out_ptr, \ |
|
_IBA_GET_MEM_PTR(field_struct, field_offset, \ |
|
type, num_bits, ptr), \ |
|
bytes); \ |
|
}) |
|
#define IBA_GET_MEM(field, ptr, out, bytes) _IBA_GET_MEM(field, ptr, out, bytes) |
|
|
|
/* |
|
* The generated list becomes the parameters to the macros, the order is: |
|
* - struct this applies to |
|
* - starting offset of the max |
|
* - GENMASK or GENMASK_ULL in CPU order |
|
* - The width of data the mask operations should work on, in bits |
|
*/ |
|
|
|
/* |
|
* Extraction using a tabular description like table 106. bit_offset is from |
|
* the Byte[Bit] notation. |
|
*/ |
|
#define IBA_FIELD_BLOC(field_struct, byte_offset, bit_offset, num_bits) \ |
|
field_struct, byte_offset, \ |
|
GENMASK(7 - (bit_offset), 7 - (bit_offset) - (num_bits - 1)), \ |
|
8 |
|
#define IBA_FIELD8_LOC(field_struct, byte_offset, num_bits) \ |
|
IBA_FIELD_BLOC(field_struct, byte_offset, 0, num_bits) |
|
|
|
#define IBA_FIELD16_LOC(field_struct, byte_offset, num_bits) \ |
|
field_struct, (byte_offset)&0xFFFE, \ |
|
GENMASK(15 - (((byte_offset) % 2) * 8), \ |
|
15 - (((byte_offset) % 2) * 8) - (num_bits - 1)), \ |
|
16 |
|
|
|
#define IBA_FIELD32_LOC(field_struct, byte_offset, num_bits) \ |
|
field_struct, (byte_offset)&0xFFFC, \ |
|
GENMASK(31 - (((byte_offset) % 4) * 8), \ |
|
31 - (((byte_offset) % 4) * 8) - (num_bits - 1)), \ |
|
32 |
|
|
|
#define IBA_FIELD64_LOC(field_struct, byte_offset) \ |
|
field_struct, byte_offset, GENMASK_ULL(63, 0), 64 |
|
/* |
|
* In IBTA spec, everything that is more than 64bits is multiple |
|
* of bytes without leftover bits. |
|
*/ |
|
#define IBA_FIELD_MLOC(field_struct, byte_offset, num_bits, type) \ |
|
field_struct, byte_offset, type, num_bits |
|
|
|
#endif /* _IBA_DEFS_H_ */
|
|
|