update ceph source to reef 18.1.2

[ceph.git] / ceph / src / crypto / isa-l / isa-l_crypto / include / md5_mb.h

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#ifndef _MD5_MB_H_
#define _MD5_MB_H_

/**
 *  @file md5_mb.h
 *  @brief Multi-buffer CTX API MD5 function prototypes and structures
 *
 * Interface for multi-buffer MD5 functions
 *
 * <b> Multi-buffer MD5  Entire or First-Update..Update-Last </b>
 *
 * The interface to this multi-buffer hashing code is carried out through the
 * context-level (CTX) init, submit and flush functions and the MD5_HASH_CTX_MGR and
 * MD5_HASH_CTX objects. Numerous MD5_HASH_CTX objects may be instantiated by the
 * application for use with a single MD5_HASH_CTX_MGR.
 *
 * The CTX interface functions carry out the initialization and padding of the jobs
 * entered by the user and add them to the multi-buffer manager. The lower level "scheduler"
 * layer then processes the jobs in an out-of-order manner. The scheduler layer functions
 * are internal and are not intended to be invoked directly. Jobs can be submitted
 * to a CTX as a complete buffer to be hashed, using the HASH_ENTIRE flag, or as partial
 * jobs which can be started using the HASH_FIRST flag, and later resumed or finished
 * using the HASH_UPDATE and HASH_LAST flags respectively.
 *
 * <b>Note:</b> The submit function does not require data buffers to be block sized.
 *
 * The MD5 CTX interface functions are available for 4 architectures: SSE, AVX, AVX2 and
 * AVX512. In addition, a multibinary interface is provided, which selects the appropriate
 * architecture-specific function at runtime.
 *
 * <b>Usage:</b> The application creates a MD5_HASH_CTX_MGR object and initializes it
 * with a call to md5_ctx_mgr_init*() function, where henceforth "*" stands for the
 * relevant suffix for each architecture; _sse, _avx, _avx2, _avx512 (or no suffix for the
 * multibinary version). The MD5_HASH_CTX_MGR object will be used to schedule processor
 * resources, with up to 8 MD5_HASH_CTX objects (or 16 in AVX2 case, 32 in AVX512 case)
 * being processed at a time.
 *
 * Each MD5_HASH_CTX must be initialized before first use by the hash_ctx_init macro
 * defined in multi_buffer.h. After initialization, the application may begin computing
 * a hash by giving the MD5_HASH_CTX to a MD5_HASH_CTX_MGR using the submit functions
 * md5_ctx_mgr_submit*() with the HASH_FIRST flag set. When the MD5_HASH_CTX is
 * returned to the application (via this or a later call to md5_ctx_mgr_submit*() or
 * md5_ctx_mgr_flush*()), the application can then re-submit it with another call to
 * md5_ctx_mgr_submit*(), but without the HASH_FIRST flag set.
 *
 * Ideally, on the last buffer for that hash, md5_ctx_mgr_submit_sse is called with
 * HASH_LAST, although it is also possible to submit the hash with HASH_LAST and a zero
 * length if necessary. When a MD5_HASH_CTX is returned after having been submitted with
 * HASH_LAST, it will contain a valid hash. The MD5_HASH_CTX can be reused immediately
 * by submitting with HASH_FIRST.
 *
 * For example, you would submit hashes with the following flags for the following numbers
 * of buffers:
 * <ul>
 *  <li> one buffer: HASH_FIRST | HASH_LAST  (or, equivalently, HASH_ENTIRE)
 *  <li> two buffers: HASH_FIRST, HASH_LAST
 *  <li> three buffers: HASH_FIRST, HASH_UPDATE, HASH_LAST
 * etc.
 * </ul>
 *
 * The order in which MD5_CTX objects are returned is in general different from the order
 * in which they are submitted.
 *
 * A few possible error conditions exist:
 * <ul>
 *  <li> Submitting flags other than the allowed entire/first/update/last values
 *  <li> Submitting a context that is currently being managed by a MD5_HASH_CTX_MGR.
 *  <li> Submitting a context after HASH_LAST is used but before HASH_FIRST is set.
 * </ul>
 *
 *  These error conditions are reported by returning the MD5_HASH_CTX immediately after
 *  a submit with its error member set to a non-zero error code (defined in
 *  multi_buffer.h). No changes are made to the MD5_HASH_CTX_MGR in the case of an
 *  error; no processing is done for other hashes.
 *
 */

#include <stdint.h>
#include "multi_buffer.h"
#include "types.h"

#ifdef __cplusplus
extern "C" {
#endif

// Hash Constants and Typedefs
#define MD5_DIGEST_NWORDS	4
#define MD5_MAX_LANES		32
#define MD5_MIN_LANES		8
#define MD5_BLOCK_SIZE		64
#define MD5_LOG2_BLOCK_SIZE	6
#define MD5_PADLENGTHFIELD_SIZE	8
#define MD5_INITIAL_DIGEST	\
	0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476

typedef uint32_t md5_digest_array[MD5_DIGEST_NWORDS][MD5_MAX_LANES];
typedef uint32_t MD5_WORD_T;

/** @brief Scheduler layer - Holds info describing a single MD5 job for the multi-buffer manager */

typedef struct {
    uint8_t*  buffer;	//!< pointer to data buffer for this job
    uint32_t  len;	//!< length of buffer for this job in blocks.
    DECLARE_ALIGNED(uint32_t result_digest[MD5_DIGEST_NWORDS],64);
    JOB_STS status;	//!< output job status
    void*   user_data;	//!< pointer for user's job-related data
} MD5_JOB;

/** @brief Scheduler layer -  Holds arguments for submitted MD5 job */

typedef struct {
    md5_digest_array digest;
    uint8_t*       data_ptr[MD5_MAX_LANES];
} MD5_MB_ARGS_X32;

/** @brief Scheduler layer - Lane data */

typedef struct {
    MD5_JOB *job_in_lane;
} MD5_LANE_DATA;

/** @brief Scheduler layer - Holds state for multi-buffer MD5 jobs */

typedef struct {
    MD5_MB_ARGS_X32 args;
    uint32_t lens[MD5_MAX_LANES];
    uint64_t unused_lanes[4]; //!< each byte or nibble is index (0...31 or 15) of unused lanes.
    MD5_LANE_DATA ldata[MD5_MAX_LANES];
    uint32_t num_lanes_inuse;
} MD5_MB_JOB_MGR;

/** @brief Context layer - Holds state for multi-buffer MD5 jobs */

typedef struct {
	MD5_MB_JOB_MGR mgr;
} MD5_HASH_CTX_MGR;

/** @brief Context layer - Holds info describing a single MD5 job for the multi-buffer CTX manager */

typedef struct {
	MD5_JOB        job;             // Must be at struct offset 0.
	HASH_CTX_STS   status;		//!< Context status flag
	HASH_CTX_ERROR error;		//!< Context error flag
	uint64_t       total_length;	//!< Running counter of length processed for this CTX's job
	const void*    incoming_buffer; //!< pointer to data input buffer for this CTX's job
	uint32_t       incoming_buffer_length; //!< length of buffer for this job in bytes.
	uint8_t        partial_block_buffer[MD5_BLOCK_SIZE * 2]; //!< CTX partial blocks
	uint32_t       partial_block_buffer_length;
	void*          user_data;	//!< pointer for user to keep any job-related data
} MD5_HASH_CTX;

/*******************************************************************
 * CTX level API function prototypes
 ******************************************************************/

/**
 * @brief Initialize the context level MD5 multi-buffer manager structure.
 * @requires SSE4.1
 *
 * @param mgr Structure holding context level state info
 * @returns void
 */
void      md5_ctx_mgr_init_sse   (MD5_HASH_CTX_MGR* mgr);

/**
 * @brief  Submit a new MD5 job to the context level multi-buffer manager.
 * @requires SSE4.1
 *
 * @param  mgr Structure holding context level state info
 * @param  ctx Structure holding ctx job info
 * @param  buffer Pointer to buffer to be processed
 * @param  len Length of buffer (in bytes) to be processed
 * @param  flags Input flag specifying job type (first, update, last or entire)
 * @returns NULL if no jobs complete or pointer to jobs structure.
 */
MD5_HASH_CTX* md5_ctx_mgr_submit_sse (MD5_HASH_CTX_MGR* mgr, MD5_HASH_CTX* ctx,
				const void* buffer, uint32_t len, HASH_CTX_FLAG flags);

/**
 * @brief Finish all submitted MD5 jobs and return when complete.
 * @requires SSE4.1
 *
 * @param mgr	Structure holding context level state info
 * @returns NULL if no jobs to complete or pointer to jobs structure.
 */
MD5_HASH_CTX* md5_ctx_mgr_flush_sse  (MD5_HASH_CTX_MGR* mgr);

/**
 * @brief Initialize the MD5 multi-buffer manager structure.
 * @requires AVX
 *
 * @param mgr Structure holding context level state info
 * @returns void
 */
void      md5_ctx_mgr_init_avx   (MD5_HASH_CTX_MGR* mgr);

/**
 * @brief  Submit a new MD5 job to the multi-buffer manager.
 * @requires AVX
 *
 * @param  mgr Structure holding context level state info
 * @param  ctx Structure holding ctx job info
 * @param  buffer Pointer to buffer to be processed
 * @param  len Length of buffer (in bytes) to be processed
 * @param  flags Input flag specifying job type (first, update, last or entire)
 * @returns NULL if no jobs complete or pointer to jobs structure.
 */
MD5_HASH_CTX* md5_ctx_mgr_submit_avx (MD5_HASH_CTX_MGR* mgr, MD5_HASH_CTX* ctx,
				const void* buffer, uint32_t len, HASH_CTX_FLAG flags);

/**
 * @brief Finish all submitted MD5 jobs and return when complete.
 * @requires AVX
 *
 * @param mgr	Structure holding context level state info
 * @returns NULL if no jobs to complete or pointer to jobs structure.
 */
MD5_HASH_CTX* md5_ctx_mgr_flush_avx  (MD5_HASH_CTX_MGR* mgr);

/**
 * @brief Initialize the MD5 multi-buffer manager structure.
 * @requires AVX2
 *
 * @param mgr	Structure holding context level state info
 * @returns void
 */
void      md5_ctx_mgr_init_avx2   (MD5_HASH_CTX_MGR* mgr);

/**
 * @brief  Submit a new MD5 job to the multi-buffer manager.
 * @requires AVX2
 *
 * @param  mgr Structure holding context level state info
 * @param  ctx Structure holding ctx job info
 * @param  buffer Pointer to buffer to be processed
 * @param  len Length of buffer (in bytes) to be processed
 * @param  flags Input flag specifying job type (first, update, last or entire)
 * @returns NULL if no jobs complete or pointer to jobs structure.
 */
MD5_HASH_CTX* md5_ctx_mgr_submit_avx2 (MD5_HASH_CTX_MGR* mgr, MD5_HASH_CTX* ctx,
				const void* buffer, uint32_t len, HASH_CTX_FLAG flags);

/**
 * @brief Finish all submitted MD5 jobs and return when complete.
 * @requires AVX2
 *
 * @param mgr	Structure holding context level state info
 * @returns NULL if no jobs to complete or pointer to jobs structure.
 */
MD5_HASH_CTX* md5_ctx_mgr_flush_avx2  (MD5_HASH_CTX_MGR* mgr);

/**
 * @brief Initialize the MD5 multi-buffer manager structure.
 * @requires AVX512
 *
 * @param mgr	Structure holding context level state info
 * @returns void
 */
void      md5_ctx_mgr_init_avx512   (MD5_HASH_CTX_MGR* mgr);

/**
 * @brief  Submit a new MD5 job to the multi-buffer manager.
 * @requires AVX512
 *
 * @param  mgr Structure holding context level state info
 * @param  ctx Structure holding ctx job info
 * @param  buffer Pointer to buffer to be processed
 * @param  len Length of buffer (in bytes) to be processed
 * @param  flags Input flag specifying job type (first, update, last or entire)
 * @returns NULL if no jobs complete or pointer to jobs structure.
 */
MD5_HASH_CTX* md5_ctx_mgr_submit_avx512 (MD5_HASH_CTX_MGR* mgr, MD5_HASH_CTX* ctx,
				const void* buffer, uint32_t len, HASH_CTX_FLAG flags);

/**
 * @brief Finish all submitted MD5 jobs and return when complete.
 * @requires AVX512
 *
 * @param mgr	Structure holding context level state info
 * @returns NULL if no jobs to complete or pointer to jobs structure.
 */
MD5_HASH_CTX* md5_ctx_mgr_flush_avx512  (MD5_HASH_CTX_MGR* mgr);

/******************** multibinary function prototypes **********************/

/**
 * @brief Initialize the MD5 multi-buffer manager structure.
 * @requires SSE4.1 or AVX or AVX2 or AVX512
 *
 * @param mgr	Structure holding context level state info
 * @returns void
 */
void      md5_ctx_mgr_init   (MD5_HASH_CTX_MGR* mgr);

/**
 * @brief  Submit a new MD5 job to the multi-buffer manager.
 * @requires SSE4.1 or AVX or AVX2 or AVX512
 *
 * @param  mgr Structure holding context level state info
 * @param  ctx Structure holding ctx job info
 * @param  buffer Pointer to buffer to be processed
 * @param  len Length of buffer (in bytes) to be processed
 * @param  flags Input flag specifying job type (first, update, last or entire)
 * @returns NULL if no jobs complete or pointer to jobs structure.
 */
MD5_HASH_CTX* md5_ctx_mgr_submit (MD5_HASH_CTX_MGR* mgr, MD5_HASH_CTX* ctx,
				const void* buffer, uint32_t len, HASH_CTX_FLAG flags);

/**
 * @brief Finish all submitted MD5 jobs and return when complete.
 * @requires SSE4.1 or AVX or AVX2 or AVX512
 *
 * @param mgr	Structure holding context level state info
 * @returns NULL if no jobs to complete or pointer to jobs structure.
 */
MD5_HASH_CTX* md5_ctx_mgr_flush  (MD5_HASH_CTX_MGR* mgr);


/*******************************************************************
 * Scheduler (internal) level out-of-order function prototypes
 ******************************************************************/

void     md5_mb_mgr_init_sse           (MD5_MB_JOB_MGR *state);
MD5_JOB* md5_mb_mgr_submit_sse         (MD5_MB_JOB_MGR *state, MD5_JOB* job);
MD5_JOB* md5_mb_mgr_flush_sse          (MD5_MB_JOB_MGR *state);

#define  md5_mb_mgr_init_avx           md5_mb_mgr_init_sse
MD5_JOB* md5_mb_mgr_submit_avx         (MD5_MB_JOB_MGR *state, MD5_JOB* job);
MD5_JOB* md5_mb_mgr_flush_avx          (MD5_MB_JOB_MGR *state);

void     md5_mb_mgr_init_avx2           (MD5_MB_JOB_MGR *state);
MD5_JOB* md5_mb_mgr_submit_avx2         (MD5_MB_JOB_MGR *state, MD5_JOB* job);
MD5_JOB* md5_mb_mgr_flush_avx2          (MD5_MB_JOB_MGR *state);

void  md5_mb_mgr_init_avx512            (MD5_MB_JOB_MGR *state);
MD5_JOB* md5_mb_mgr_submit_avx512       (MD5_MB_JOB_MGR *state, MD5_JOB* job);
MD5_JOB* md5_mb_mgr_flush_avx512        (MD5_MB_JOB_MGR *state);

#ifdef __cplusplus
}
#endif

#endif // _MD5_MB_H_