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/* SPDX-License-Identifier: GPL-2.0
*
* Copyright 2005-2006 Fen Systems Ltd.
* Copyright 2006-2013 Solarflare Communications Inc.
* Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
*/
#ifndef CDX_BITFIELD_H
#define CDX_BITFIELD_H
#include <linux/bitfield.h>
/* Lowest bit numbers and widths */
#define CDX_DWORD_LBN 0
#define CDX_DWORD_WIDTH 32
/* Specified attribute (e.g. LBN) of the specified field */
#define CDX_VAL(field, attribute) field ## _ ## attribute
/* Low bit number of the specified field */
#define CDX_LOW_BIT(field) CDX_VAL(field, LBN)
/* Bit width of the specified field */
#define CDX_WIDTH(field) CDX_VAL(field, WIDTH)
/* High bit number of the specified field */
#define CDX_HIGH_BIT(field) (CDX_LOW_BIT(field) + CDX_WIDTH(field) - 1)
/* A doubleword (i.e. 4 byte) datatype - little-endian in HW */
struct cdx_dword {
__le32 cdx_u32;
};
/* Value expanders for printk */
#define CDX_DWORD_VAL(dword) \
((unsigned int)le32_to_cpu((dword).cdx_u32))
/*
* Extract bit field portion [low,high) from the 32-bit little-endian
* element which contains bits [min,max)
*/
#define CDX_DWORD_FIELD(dword, field) \
(FIELD_GET(GENMASK(CDX_HIGH_BIT(field), CDX_LOW_BIT(field)), \
le32_to_cpu((dword).cdx_u32)))
/*
* Creates the portion of the named bit field that lies within the
* range [min,max).
*/
#define CDX_INSERT_FIELD(field, value) \
(FIELD_PREP(GENMASK(CDX_HIGH_BIT(field), \
CDX_LOW_BIT(field)), value))
/*
* Creates the portion of the named bit fields that lie within the
* range [min,max).
*/
#define CDX_INSERT_FIELDS(field1, value1, \
field2, value2, \
field3, value3, \
field4, value4, \
field5, value5, \
field6, value6, \
field7, value7) \
(CDX_INSERT_FIELD(field1, (value1)) | \
CDX_INSERT_FIELD(field2, (value2)) | \
CDX_INSERT_FIELD(field3, (value3)) | \
CDX_INSERT_FIELD(field4, (value4)) | \
CDX_INSERT_FIELD(field5, (value5)) | \
CDX_INSERT_FIELD(field6, (value6)) | \
CDX_INSERT_FIELD(field7, (value7)))
#define CDX_POPULATE_DWORD(dword, ...) \
(dword).cdx_u32 = cpu_to_le32(CDX_INSERT_FIELDS(__VA_ARGS__))
/* Populate a dword field with various numbers of arguments */
#define CDX_POPULATE_DWORD_7 CDX_POPULATE_DWORD
#define CDX_POPULATE_DWORD_6(dword, ...) \
CDX_POPULATE_DWORD_7(dword, CDX_DWORD, 0, __VA_ARGS__)
#define CDX_POPULATE_DWORD_5(dword, ...) \
CDX_POPULATE_DWORD_6(dword, CDX_DWORD, 0, __VA_ARGS__)
#define CDX_POPULATE_DWORD_4(dword, ...) \
CDX_POPULATE_DWORD_5(dword, CDX_DWORD, 0, __VA_ARGS__)
#define CDX_POPULATE_DWORD_3(dword, ...) \
CDX_POPULATE_DWORD_4(dword, CDX_DWORD, 0, __VA_ARGS__)
#define CDX_POPULATE_DWORD_2(dword, ...) \
CDX_POPULATE_DWORD_3(dword, CDX_DWORD, 0, __VA_ARGS__)
#define CDX_POPULATE_DWORD_1(dword, ...) \
CDX_POPULATE_DWORD_2(dword, CDX_DWORD, 0, __VA_ARGS__)
#define CDX_SET_DWORD(dword) \
CDX_POPULATE_DWORD_1(dword, CDX_DWORD, 0xffffffff)
#endif /* CDX_BITFIELD_H */
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