/* 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 <linux/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_ */