Initial commit
Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>
This commit is contained in:
Robert Baldyga
202
src/ocf_request.h
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202
src/ocf_request.h
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/*
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* Copyright(c) 2012-2018 Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause-Clear
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*/
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#ifndef __OCF_REQUEST_H__
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#define __OCF_REQUEST_H__
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#include "ocf_env.h"
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struct ocf_req_info {
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/* Number of hits, invalid, misses. */
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unsigned int hit_no;
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unsigned int invalid_no;
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uint32_t dirty_all;
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/*!< Number of dirty line in request*/
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uint32_t dirty_any;
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/*!< Indicates that at least one request is dirty */
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uint32_t seq_req : 1;
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/*!< Sequential cache request flag. */
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uint32_t seq_cutoff : 1;
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/*!< Sequential cut off set for this request */
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uint32_t flush_metadata : 1;
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/*!< This bit tells if metadata flushing is required */
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uint32_t eviction_error : 1;
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/*!< Eviction error flag */
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uint32_t re_part : 1;
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/*!< This bit indicate that in the request some cache lines
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* has to be moved to another partition
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*/
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uint32_t core_error : 1;
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/*!< Error occured during I/O on core device */
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uint32_t cleaner_cache_line_lock : 1;
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/*!< Cleaner flag - acquire cache line lock */
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uint32_t internal : 1;
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/**!< this is an internal request */
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};
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struct ocf_map_info {
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/* If HIT -> pointer to hash_key and coll_idx */
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unsigned int hash_key;
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unsigned int coll_idx;
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uint64_t core_line;
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ocf_core_id_t core_id;
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/*!< Core id for multi-core requests */
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uint16_t status : 8;
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/*!< Traverse or mapping status - HIT, MISS, etc... */
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uint16_t rd_locked : 1;
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/*!< Indicates if cache line is locked for READ access */
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uint16_t wr_locked : 1;
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/*!< Indicates if cache line is locked for WRITE access */
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uint16_t invalid : 1;
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/*!< This bit indicates that mapping is invalid */
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uint16_t re_part : 1;
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/*!< This bit indicates if cache line need to be moved to the
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* new partition
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*/
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uint16_t flush : 1;
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/*!< This bit indicates if cache line need to be flushed */
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uint8_t start_flush;
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/*!< If rq need flush, contain first sector of range to flush */
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uint8_t stop_flush;
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/*!< If rq need flush, contain last sector of range to flush */
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};
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/**
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* @brief OCF discard request info
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*/
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struct ocf_req_discard_info {
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sector_t sector;
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/*!< The start sector for discard request */
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sector_t nr_sects;
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/*!< Number of sectors to be discarded */
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sector_t handled;
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/*!< Number of processed sector during discard operation */
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};
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/**
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* @brief OCF IO request
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*/
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struct ocf_request {
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env_atomic ref_count;
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/*!< Reference usage count, once OCF request reaches zero it
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* will be de-initialed. Get/Put method are intended to modify
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* reference counter
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*/
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env_atomic lock_remaining;
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/*!< This filed indicates how many cache lines in the request
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* map left to be locked
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*/
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env_atomic req_remaining;
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/*!< In case of IO this field indicates how many IO left to
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* accomplish IO
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*/
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env_atomic master_remaining;
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/*!< Atomic counter for core device */
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struct ocf_cache *cache;
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/*!< Handle to cache instance */
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const struct ocf_io_if *io_if;
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/*!< IO interface */
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void (*resume)(struct ocf_request *rq);
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/*!< OCF request resume callback */
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ocf_core_id_t core_id;
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/*!< This file indicates core id of request */
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ocf_part_id_t part_id;
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/*!< Targeted partition of requests */
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void *priv;
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/*!< Filed for private data, context */
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void *master_io_req;
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/*!< Core device request context (core private info) */
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ctx_data_t *data;
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/*!< Request data*/
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ctx_data_t *cp_data;
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/*!< Copy of request data */
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uint64_t byte_position;
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/*!< LBA byte position of request in code domain */
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uint64_t core_line_first;
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/*! First core line */
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uint64_t core_line_last;
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/*! Last core line */
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uint32_t byte_length;
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/*!< Byte length of OCF reuqest */
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uint32_t core_line_count;
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/*! Core line count */
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uint32_t alloc_core_line_count;
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/*! Core line count for which request was initially allocated */
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uint32_t io_queue;
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/*!< I/O queue id for which request should be submitted */
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int error;
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/*!< This filed indicates an error for OCF request */
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int rw;
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/*!< Indicator of IO direction - Read/Write */
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struct list_head list;
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/*!< List item for OCF IO thread workers */
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struct ocf_req_info info;
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/*!< Detailed request info */
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uint8_t d2c;
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/**!< request affects metadata cachelines (is not direct-to-core) */
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uint8_t master_io_req_type;
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/*!< Core device request context type */
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void (*complete)(struct ocf_request *ocf_req, int error);
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/*!< Request completion funstion */
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struct ocf_io *io;
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/*!< OCF IO associated with request */
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struct ocf_req_discard_info discard;
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struct ocf_map_info *map;
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struct ocf_map_info __map[];
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};
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#endif
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