diff options
Diffstat (limited to 'lib/zlib_dfltcc/dfltcc.h')
| -rw-r--r-- | lib/zlib_dfltcc/dfltcc.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/lib/zlib_dfltcc/dfltcc.h b/lib/zlib_dfltcc/dfltcc.h new file mode 100644 index 0000000000..b96232bdd4 --- /dev/null +++ b/lib/zlib_dfltcc/dfltcc.h @@ -0,0 +1,124 @@ +// 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(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 */ |