07d1079baa
Allowing request cacheline lock to be called on partially locked request. This is going to be usefull for upcomming eviction improvements, where request will first have evicted (LOOKUP_REMAPPED) cachelines assigned to it in a locked state, followed by standard request cacheline lock call in order to lock previously inserted (LOOKUP_HIT) or mapped from freelist (LOOKUP_INSERTED) cachelines. Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/*
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* Copyright(c) 2012-2021 Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause-Clear
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*/
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#ifndef __CACHE_ENGINE_H_
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#define __CACHE_ENGINE_H_
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struct ocf_thread_priv;
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struct ocf_request;
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#define LOOKUP_HIT 5
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#define LOOKUP_MISS 6
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#define LOOKUP_INSERTED 8
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#define LOOKUP_REMAPPED 9
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typedef enum {
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/* modes inherited from user API */
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ocf_req_cache_mode_wt = ocf_cache_mode_wt,
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ocf_req_cache_mode_wb = ocf_cache_mode_wb,
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ocf_req_cache_mode_wa = ocf_cache_mode_wa,
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ocf_req_cache_mode_pt = ocf_cache_mode_pt,
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ocf_req_cache_mode_wi = ocf_cache_mode_wi,
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ocf_req_cache_mode_wo = ocf_cache_mode_wo,
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/* internal modes */
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ocf_req_cache_mode_fast,
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/*!< Fast path */
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ocf_req_cache_mode_d2c,
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/*!< Direct to Core - pass through to core without
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touching cacheline metadata */
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ocf_req_cache_mode_max,
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} ocf_req_cache_mode_t;
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struct ocf_io_if {
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int (*read)(struct ocf_request *req);
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int (*write)(struct ocf_request *req);
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const char *name;
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};
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void ocf_resolve_effective_cache_mode(ocf_cache_t cache,
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ocf_core_t core, struct ocf_request *req);
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const struct ocf_io_if *ocf_get_io_if(ocf_req_cache_mode_t cache_mode);
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static inline const char *ocf_get_io_iface_name(ocf_cache_mode_t cache_mode)
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{
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const struct ocf_io_if *iface = ocf_get_io_if(cache_mode);
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return iface ? iface->name : "Unknown";
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}
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static inline bool ocf_cache_mode_is_valid(ocf_cache_mode_t mode)
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{
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return mode >= ocf_cache_mode_wt && mode < ocf_cache_mode_max;
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}
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static inline bool ocf_req_cache_mode_has_lazy_write(ocf_req_cache_mode_t mode)
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{
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return ocf_cache_mode_is_valid((ocf_cache_mode_t)mode) &&
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ocf_mngt_cache_mode_has_lazy_write(
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(ocf_cache_mode_t)mode);
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}
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bool ocf_fallback_pt_is_on(ocf_cache_t cache);
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struct ocf_request *ocf_engine_pop_req(struct ocf_queue *q);
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int ocf_engine_hndl_req(struct ocf_request *req);
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#define OCF_FAST_PATH_YES 7
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#define OCF_FAST_PATH_NO 13
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int ocf_engine_hndl_fast_req(struct ocf_request *req);
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void ocf_engine_hndl_discard_req(struct ocf_request *req);
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void ocf_engine_hndl_ops_req(struct ocf_request *req);
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#endif
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