Files
ocf/src/utils/utils_rq.h
Robert Baldyga a8e1ce8cc5 Initial commit
Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>
2018-11-29 15:14:21 +01:00

155 lines
3.3 KiB
C

/*
* Copyright(c) 2012-2018 Intel Corporation
* SPDX-License-Identifier: BSD-3-Clause-Clear
*/
#ifndef UTILS_RQ_H_
#define UTILS_RQ_H_
#include "../ocf_request.h"
/**
* @file utils_rq.h
* @brief OCF request allocation utilities
*/
struct ocf_rq_allocator;
/**
* @brief Initialize OCF request allocation utility
*
* @param cache - OCF cache instance
* @return Operation status 0 - successful, non-zero failure
*/
int ocf_rq_allocator_init(struct ocf_ctx *ocf_ctx);
/**
* @brief De-initialize OCF request allocation utility
*
* @param cache - OCF cache instance
*/
void ocf_rq_allocator_deinit(struct ocf_ctx *ocf_ctx);
/**
* @brief Allocate new OCF request
*
* @param cache - OCF cache instance
* @param core_id - Core id
* @param addr - LBA of request
* @param bytes - number of bytes of request
* @param rw - Read or Write
*
* @return new OCF request
*/
struct ocf_request *ocf_rq_new(struct ocf_cache *cache,
ocf_core_id_t core_id, uint64_t addr, uint32_t bytes, int rw);
/**
* @brief Allocate OCF request map
*
* @param rq OCF request
*
* @retval 0 Allocation succeed
* @retval non-zero Allocation failed
*/
int ocf_rq_alloc_map(struct ocf_request *rq);
/**
* @brief Allocate new OCF request with NOIO map allocation for huge request
*
* @param cache - OCF cache instance
* @param core_id - Core id
* @param addr - LBA of request
* @param bytes - number of bytes of request
* @param rw - Read or Write
*
* @return new OCF request
*/
struct ocf_request *ocf_rq_new_extended(struct ocf_cache *cache,
ocf_core_id_t core_id, uint64_t addr, uint32_t bytes, int rw);
/**
* @brief Allocate new OCF request for DISCARD operation
*
* @param cache - OCF cache instance
* @param core_id - Core id
* @param addr - LBA of request
* @param bytes - number of bytes of request
* @param rw - Read or Write
*
* @return new OCF request
*/
struct ocf_request *ocf_rq_new_discard(struct ocf_cache *cache,
ocf_core_id_t core_id, uint64_t addr, uint32_t bytes, int rw);
/**
* @brief Get number of allocated requests
*
* @param cache OCF cache instance
*
* @return Number of allocated requests
*/
uint32_t ocf_rq_get_allocated(struct ocf_cache *cache);
/**
* @brief Increment OCF request reference count
*
* @param rq - OCF request
*/
void ocf_rq_get(struct ocf_request *rq);
/**
* @brief Decrement OCF request reference. If reference is 0 then request will
* be deallocated
*
* @param rq - OCF request
*/
void ocf_rq_put(struct ocf_request *rq);
/**
* @brief Clear OCF request info
*
* @param rq - OCF request
*/
void ocf_rq_clear_info(struct ocf_request *rq);
/**
* @brief Clear OCF request map
*
* @param rq - OCF request
*/
void ocf_rq_clear_map(struct ocf_request *rq);
/**
* @brief Clear OCF request
*
* @param rq - OCF request
*/
static inline void ocf_rq_clear(struct ocf_request *rq)
{
ocf_rq_clear_info(rq);
ocf_rq_clear_map(rq);
env_atomic_set(&rq->lock_remaining, 0);
env_atomic_set(&rq->req_remaining, 0);
}
/**
* @brief Return OCF request reference count
*
* @param rq - OCF request
* @return OCF request reference count
*/
static inline int ocf_rq_ref_count(struct ocf_request *rq)
{
return env_atomic_read(&rq->ref_count);
}
static inline bool ocf_rq_is_4k(uint64_t addr, uint32_t bytes)
{
return !((addr % PAGE_SIZE) || (bytes % PAGE_SIZE));
}
#endif /* UTILS_RQ_H_ */