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