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	1	/*
	2	* Copyright (c) 2000-2016 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28
	29	#pragma once
	30
	31	#if XNU_KERNEL_PRIVATE
	32	//DRKTODO: the decompression side stats should be either made optional or
	33	//per-CPU to avoid cacheline contention
	34
	35	typedef struct {
	36	uint64_t lz4_compressions;
	37	uint64_t lz4_compression_failures;
	38	uint64_t lz4_compressed_bytes;
	39	uint64_t lz4_wk_compression_delta;
	40	uint64_t lz4_wk_compression_negative_delta;
	41	uint64_t lz4_post_wk_compressions;
	42
	43	uint64_t wk_compressions;
	44	uint64_t wk_cabstime;
	45	uint64_t wk_sv_compressions;
	46	uint64_t wk_mzv_compressions;
	47	uint64_t wk_compression_failures;
	48	uint64_t wk_compressed_bytes_total;
	49	uint64_t wk_compressions_exclusive;
	50	uint64_t wk_compressed_bytes_exclusive;
	51
	52	uint64_t wkh_compressions;
	53	uint64_t wkh_cabstime;
	54	uint64_t wks_compressions;
	55	uint64_t wks_cabstime;
	56	uint64_t wks_compressed_bytes;
	57	uint64_t wks_compression_failures;
	58	uint64_t wks_sv_compressions;
	59
	60	uint64_t lz4_decompressions;
	61	uint64_t lz4_decompressed_bytes;
	62	uint64_t uc_decompressions;
	63
	64	uint64_t wk_decompressions;
	65	uint64_t wk_dabstime;
	66
	67	uint64_t wkh_decompressions;
	68	uint64_t wkh_dabstime;
	69
	70	uint64_t wks_decompressions;
	71	uint64_t wks_dabstime;
	72
	73	uint64_t wk_decompressed_bytes;
	74	uint64_t wk_sv_decompressions;
	75	} compressor_stats_t;
	76
	77	extern compressor_stats_t compressor_stats;
	78
	79	typedef struct {
	80	uint32_t lz4_selection_max;
	81	int32_t wkdm_reeval_threshold;
	82	int32_t lz4_threshold;
	83	uint32_t lz4_max_failure_skips;
	84	uint32_t lz4_max_failure_run_length;
	85	uint32_t lz4_max_preselects;
	86	uint32_t lz4_run_preselection_threshold;
	87	uint32_t lz4_run_continue_bytes;
	88	uint32_t lz4_profitable_bytes;
	89	} compressor_tuneables_t;
	90
	91	extern compressor_tuneables_t vmctune;
	92
	93	int metacompressor(const uint8_t in, uint8_t cdst, int32_t outbufsz, uint16_t codec, void cscratch, boolean_t *);
	94	void metadecompressor(const uint8_t source, uint8_t dest, uint32_t csize, uint16_t ccodec, void *compressor_dscratch);
	95
	96	typedef enum {
	97	CCWK = 0, // must be 0 or 1
	98	CCLZ4 = 1, //must be 0 or 1
	99	CINVALID = 0xFFFF
	100	} vm_compressor_codec_t;
	101
	102	typedef enum {
	103	CMODE_WK = 0,
	104	CMODE_LZ4 = 1,
	105	CMODE_HYB = 2,
	106	VM_COMPRESSOR_DEFAULT_CODEC = 3,
	107	CMODE_INVALID = 4
	108	} vm_compressor_mode_t;
	109
	110	void vm_compressor_algorithm_init(void);
	111	int vm_compressor_algorithm(void);
	112	#endif /* XNU_KERNEL_PRIVATE */