// SPDX-License-Identifier: Zlib#ifndef DFLTCC_H#define DFLTCC_H #include "../zlib_deflate/defutil.h"#include <asm/facility.h>#include <asm/setup.h> /* * Tuning parameters. */#define DFLTCC_LEVEL_MASK 0x2 /* DFLTCC compression for level 1 only */#define DFLTCC_LEVEL_MASK_DEBUG 0x3fe /* DFLTCC compression for all levels */#define DFLTCC_BLOCK_SIZE 1048576#define DFLTCC_FIRST_FHT_BLOCK_SIZE 4096#define DFLTCC_DHT_MIN_SAMPLE_SIZE 4096#define DFLTCC_RIBM 0 #define DFLTCC_FACILITY 151 /* * Parameter Block for Query Available Functions. */struct dfltcc_qaf_param {    char fns[16];    char reserved1[8];    char fmts[2];    char reserved2[6];}; static_assert(sizeof(struct dfltcc_qaf_param) == 32); #define DFLTCC_FMT0 0 /* * Parameter Block for Generate Dynamic-Huffman Table, Compress and Expand. */struct dfltcc_param_v0 {    uint16_t pbvn;                     /* Parameter-Block-Version Number */    uint8_t mvn;                       /* Model-Version Number */    uint8_t ribm;                      /* Reserved for IBM use */    unsigned reserved32 : 31;    unsigned cf : 1;                   /* Continuation Flag */    uint8_t reserved64[8];    unsigned nt : 1;                   /* New Task */    unsigned reserved129 : 1;    unsigned cvt : 1;                  /* Check Value Type */    unsigned reserved131 : 1;    unsigned htt : 1;                  /* Huffman-Table Type */    unsigned bcf : 1;                  /* Block-Continuation Flag */    unsigned bcc : 1;                  /* Block Closing Control */    unsigned bhf : 1;                  /* Block Header Final */    unsigned reserved136 : 1;    unsigned reserved137 : 1;    unsigned dhtgc : 1;                /* DHT Generation Control */    unsigned reserved139 : 5;    unsigned reserved144 : 5;    unsigned sbb : 3;                  /* Sub-Byte Boundary */    uint8_t oesc;                      /* Operation-Ending-Supplemental Code */    unsigned reserved160 : 12;    unsigned ifs : 4;                  /* Incomplete-Function Status */    uint16_t ifl;                      /* Incomplete-Function Length */    uint8_t reserved192[8];    uint8_t reserved256[8];    uint8_t reserved320[4];    uint16_t hl;                       /* History Length */    unsigned reserved368 : 1;    uint16_t ho : 15;                  /* History Offset */    uint32_t cv;                       /* Check Value */    unsigned eobs : 15;                /* End-of-block Symbol */    unsigned reserved431: 1;    uint8_t eobl : 4;                  /* End-of-block Length */    unsigned reserved436 : 12;    unsigned reserved448 : 4;    uint16_t cdhtl : 12;               /* Compressed-Dynamic-Huffman Table                                          Length */    uint8_t reserved464[6];    uint8_t cdht[288];    uint8_t reserved[32];    uint8_t csb[1152];}; static_assert(offsetof(struct dfltcc_param_v0, csb) == 384);static_assert(sizeof(struct dfltcc_param_v0) == 1536); #define CVT_CRC32 0#define CVT_ADLER32 1#define HTT_FIXED 0#define HTT_DYNAMIC 1 /* *  Extension of inflate_state and deflate_state for DFLTCC. */struct dfltcc_state {    struct dfltcc_param_v0 param;      /* Parameter block */    struct dfltcc_qaf_param af;        /* Available functions */    char msg[64];                      /* Buffer for strm->msg */}; /* *  Extension of inflate_state and deflate_state for DFLTCC. */struct dfltcc_deflate_state {    struct dfltcc_state common;        /* Parameter block */    uLong level_mask;                  /* Levels on which to use DFLTCC */    uLong block_size;                  /* New block each X bytes */    uLong block_threshold;             /* New block after total_in > X */    uLong dht_threshold;               /* New block only if avail_in >= X */}; #define ALIGN_UP(p, size) (__typeof__(p))(((uintptr_t)(p) + ((size) - 1)) & ~((size) - 1))/* Resides right after inflate_state or deflate_state */#define GET_DFLTCC_STATE(state) ((struct dfltcc_state *)((char *)(state) + ALIGN_UP(sizeof(*state), 8))) void dfltcc_reset_state(struct dfltcc_state *dfltcc_state); static inline int is_dfltcc_enabled(void){return (zlib_dfltcc_support != ZLIB_DFLTCC_DISABLED &&        test_facility(DFLTCC_FACILITY));} #define DEFLATE_DFLTCC_ENABLED() is_dfltcc_enabled() #endif /* DFLTCC_H */