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1/* SPDX-License-Identifier: GPL-2.02 *3 * Copyright 2005-2006 Fen Systems Ltd.4 * Copyright 2006-2013 Solarflare Communications Inc.5 * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.6 */7 8#ifndef CDX_BITFIELD_H9#define CDX_BITFIELD_H10 11#include <linux/bitfield.h>12 13/* Lowest bit numbers and widths */14#define CDX_DWORD_LBN 015#define CDX_DWORD_WIDTH 3216 17/* Specified attribute (e.g. LBN) of the specified field */18#define CDX_VAL(field, attribute) field ## _ ## attribute19/* Low bit number of the specified field */20#define CDX_LOW_BIT(field) CDX_VAL(field, LBN)21/* Bit width of the specified field */22#define CDX_WIDTH(field) CDX_VAL(field, WIDTH)23/* High bit number of the specified field */24#define CDX_HIGH_BIT(field) (CDX_LOW_BIT(field) + CDX_WIDTH(field) - 1)25 26/* A doubleword (i.e. 4 byte) datatype - little-endian in HW */27struct cdx_dword {28 __le32 cdx_u32;29};30 31/* Value expanders for printk */32#define CDX_DWORD_VAL(dword) \33 ((unsigned int)le32_to_cpu((dword).cdx_u32))34 35/*36 * Extract bit field portion [low,high) from the 32-bit little-endian37 * element which contains bits [min,max)38 */39#define CDX_DWORD_FIELD(dword, field) \40 (FIELD_GET(GENMASK(CDX_HIGH_BIT(field), CDX_LOW_BIT(field)), \41 le32_to_cpu((dword).cdx_u32)))42 43/*44 * Creates the portion of the named bit field that lies within the45 * range [min,max).46 */47#define CDX_INSERT_FIELD(field, value) \48 (FIELD_PREP(GENMASK(CDX_HIGH_BIT(field), \49 CDX_LOW_BIT(field)), value))50 51/*52 * Creates the portion of the named bit fields that lie within the53 * range [min,max).54 */55#define CDX_INSERT_FIELDS(field1, value1, \56 field2, value2, \57 field3, value3, \58 field4, value4, \59 field5, value5, \60 field6, value6, \61 field7, value7) \62 (CDX_INSERT_FIELD(field1, (value1)) | \63 CDX_INSERT_FIELD(field2, (value2)) | \64 CDX_INSERT_FIELD(field3, (value3)) | \65 CDX_INSERT_FIELD(field4, (value4)) | \66 CDX_INSERT_FIELD(field5, (value5)) | \67 CDX_INSERT_FIELD(field6, (value6)) | \68 CDX_INSERT_FIELD(field7, (value7)))69 70#define CDX_POPULATE_DWORD(dword, ...) \71 (dword).cdx_u32 = cpu_to_le32(CDX_INSERT_FIELDS(__VA_ARGS__))72 73/* Populate a dword field with various numbers of arguments */74#define CDX_POPULATE_DWORD_7 CDX_POPULATE_DWORD75#define CDX_POPULATE_DWORD_6(dword, ...) \76 CDX_POPULATE_DWORD_7(dword, CDX_DWORD, 0, __VA_ARGS__)77#define CDX_POPULATE_DWORD_5(dword, ...) \78 CDX_POPULATE_DWORD_6(dword, CDX_DWORD, 0, __VA_ARGS__)79#define CDX_POPULATE_DWORD_4(dword, ...) \80 CDX_POPULATE_DWORD_5(dword, CDX_DWORD, 0, __VA_ARGS__)81#define CDX_POPULATE_DWORD_3(dword, ...) \82 CDX_POPULATE_DWORD_4(dword, CDX_DWORD, 0, __VA_ARGS__)83#define CDX_POPULATE_DWORD_2(dword, ...) \84 CDX_POPULATE_DWORD_3(dword, CDX_DWORD, 0, __VA_ARGS__)85#define CDX_POPULATE_DWORD_1(dword, ...) \86 CDX_POPULATE_DWORD_2(dword, CDX_DWORD, 0, __VA_ARGS__)87#define CDX_SET_DWORD(dword) \88 CDX_POPULATE_DWORD_1(dword, CDX_DWORD, 0xffffffff)89 90#endif /* CDX_BITFIELD_H */91