/* SPDX-License-Identifier: BSD-3-Clause * Copyright 2016-2018 NXP * Copyright (c) 2018-2019, Vladimir Oltean <olteanv@gmail.com> #ifndef _LINUX_PACKING_H#define _LINUX_PACKING_H#include <linux/array_size.h>#include <linux/bitops.h>#include <linux/build_bug.h>#include <linux/minmax.h>#include <linux/stddef.h>#include <linux/types.h>#define GEN_PACKED_FIELD_STRUCT(__type) \struct packed_field_ ## __type { \/* struct packed_field_u8. Use with bit offsets < 256, buffers < 32B and * unpacked structures < 256B. /* struct packed_field_u16. Use with bit offsets < 65536, buffers < 8KB and * unpacked structures < 64KB. #define PACKED_FIELD(start, end, struct_name, struct_field) \#define CHECK_PACKED_FIELD_OVERLAP(fields, index1, index2) ({ \const bool _ascending = __f[0].startbit < __f[1].startbit; \" field " __stringify(index2) \" breaks ascending order" ); \" field " __stringify(index2) \" breaks descending order" ); \" field " __stringify(index2) \" overlaps with previous field" ); \#define CHECK_PACKED_FIELD(fields, index) ({ \" field " __stringify(index) \" start bit must not be smaller than end bit" ); \" field " __stringify(index) \" has unsupported unpacked storage size" ); \" field " __stringify(index) \" exceeds unpacked storage size" ); \/* Note that the packed fields may be either in ascending or descending order. * Thus, we must check that both the first and last field wit within the * packed buffer size. #define CHECK_PACKED_FIELDS_SIZE(fields, pbuflen) ({ \const size_t num_fields = ARRAY_SIZE(fields); \" pbuflen " __stringify(pbuflen) \" must be a compile time constant" ); \" first field exceeds packed buffer size" ); \" last field exceeds packed buffer size" ); \#define QUIRK_MSB_ON_THE_RIGHT BIT(0)#define QUIRK_LITTLE_ENDIAN BIT(1)#define QUIRK_LSW32_IS_FIRST BIT(2)enum packing_op {PACK ,int packing(void *pbuf, u64 *uval, int startbit, int endbit, size_t pbuflen,enum packing_op op, u8 quirks);int pack (void *pbuf, u64 uval, size_t startbit, size_t endbit, size_t pbuflen,int unpack(const void *pbuf, u64 *uval, size_t startbit, size_t endbit,void pack_fields_u8(void *pbuf, size_t pbuflen, const void *ustruct,const struct packed_field_u8 *fields, size_t num_fields,void pack_fields_u16(void *pbuf, size_t pbuflen, const void *ustruct,const struct packed_field_u16 *fields, size_t num_fields,void unpack_fields_u8(const void *pbuf, size_t pbuflen, void *ustruct,const struct packed_field_u8 *fields, size_t num_fields,void unpack_fields_u16(const void *pbuf, size_t pbuflen, void *ustruct,const struct packed_field_u16 *fields, size_t num_fields,/* Do not hand-edit the following packed field check macros! * * They are generated using scripts/gen_packed_field_checks.c, which may be * built via "make scripts_gen_packed_field_checks". If larger macro sizes are * needed in the future, please use this program to re-generate the macros and * insert them here. #define CHECK_PACKED_FIELDS_1(fields) \#define CHECK_PACKED_FIELDS_2(fields) do { \while (0)#define CHECK_PACKED_FIELDS_3(fields) do { \while (0)#define CHECK_PACKED_FIELDS_4(fields) do { \while (0)#define CHECK_PACKED_FIELDS_5(fields) do { \while (0)#define CHECK_PACKED_FIELDS_6(fields) do { \while (0)#define CHECK_PACKED_FIELDS_7(fields) do { \while (0)#define CHECK_PACKED_FIELDS_8(fields) do { \while (0)#define CHECK_PACKED_FIELDS_9(fields) do { \while (0)#define CHECK_PACKED_FIELDS_10(fields) do { \while (0)#define CHECK_PACKED_FIELDS_11(fields) do { \while (0)#define CHECK_PACKED_FIELDS_12(fields) do { \while (0)#define CHECK_PACKED_FIELDS_13(fields) do { \while (0)#define CHECK_PACKED_FIELDS_14(fields) do { \while (0)#define CHECK_PACKED_FIELDS_15(fields) do { \while (0)#define CHECK_PACKED_FIELDS_16(fields) do { \while (0)#define CHECK_PACKED_FIELDS_17(fields) do { \while (0)#define CHECK_PACKED_FIELDS_18(fields) do { \while (0)#define CHECK_PACKED_FIELDS_19(fields) do { \while (0)#define CHECK_PACKED_FIELDS_20(fields) do { \while (0)#define CHECK_PACKED_FIELDS_21(fields) do { \while (0)#define CHECK_PACKED_FIELDS_22(fields) do { \while (0)#define CHECK_PACKED_FIELDS_23(fields) do { \while (0)#define CHECK_PACKED_FIELDS_24(fields) do { \while (0)#define CHECK_PACKED_FIELDS_25(fields) do { \while (0)#define CHECK_PACKED_FIELDS_26(fields) do { \while (0)#define CHECK_PACKED_FIELDS_27(fields) do { \while (0)#define CHECK_PACKED_FIELDS_28(fields) do { \while (0)#define CHECK_PACKED_FIELDS_29(fields) do { \while (0)#define CHECK_PACKED_FIELDS_30(fields) do { \while (0)#define CHECK_PACKED_FIELDS_31(fields) do { \while (0)#define CHECK_PACKED_FIELDS_32(fields) do { \while (0)#define CHECK_PACKED_FIELDS_33(fields) do { \while (0)#define CHECK_PACKED_FIELDS_34(fields) do { \while (0)#define CHECK_PACKED_FIELDS_35(fields) do { \while (0)#define CHECK_PACKED_FIELDS_36(fields) do { \while (0)#define CHECK_PACKED_FIELDS_37(fields) do { \while (0)#define CHECK_PACKED_FIELDS_38(fields) do { \while (0)#define CHECK_PACKED_FIELDS_39(fields) do { \while (0)#define CHECK_PACKED_FIELDS_40(fields) do { \while (0)#define CHECK_PACKED_FIELDS_41(fields) do { \while (0)#define CHECK_PACKED_FIELDS_42(fields) do { \while (0)#define CHECK_PACKED_FIELDS_43(fields) do { \while (0)#define CHECK_PACKED_FIELDS_44(fields) do { \while (0)#define CHECK_PACKED_FIELDS_45(fields) do { \while (0)#define CHECK_PACKED_FIELDS_46(fields) do { \while (0)#define CHECK_PACKED_FIELDS_47(fields) do { \while (0)#define CHECK_PACKED_FIELDS_48(fields) do { \while (0)#define CHECK_PACKED_FIELDS_49(fields) do { \while (0)#define CHECK_PACKED_FIELDS_50(fields) do { \while (0)#define CHECK_PACKED_FIELDS(fields) \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \"CHECK_PACKED_FIELDS() must be regenerated to support array sizes larger than 50." ); }) \/* End of generated content */ #define pack_fields(pbuf, pbuflen, ustruct, fields, quirks) \const struct packed_field_u8 * : pack_fields_u8, \const struct packed_field_u16 * : pack_fields_u16 \#define unpack_fields(pbuf, pbuflen, ustruct, fields, quirks) \const struct packed_field_u8 * : unpack_fields_u8, \const struct packed_field_u16 * : unpack_fields_u16 \#endif quality -33%
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