517d98a6ed
OCF cannot allocate request map bigger than 4MiB (due to kmalloc limitations), thus we need to split bigger IOs into series smaller ones to reduce request map size. Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>
80 lines
1.4 KiB
C
80 lines
1.4 KiB
C
/*
|
|
* Copyright(c) 2012-2021 Intel Corporation
|
|
* SPDX-License-Identifier: BSD-3-Clause-Clear
|
|
*/
|
|
|
|
|
|
#ifndef __CONTEXT_H__
|
|
#define __CONTEXT_H__
|
|
|
|
#include "linux_kernel_version.h"
|
|
|
|
struct bio_vec_iter {
|
|
struct bio_vec *vec;
|
|
uint32_t vec_size;
|
|
uint32_t idx;
|
|
uint32_t offset;
|
|
uint32_t len;
|
|
struct bio_vec *ivec;
|
|
};
|
|
|
|
struct blk_data {
|
|
/**
|
|
* @brief Atomic counter for core device
|
|
*/
|
|
atomic_t master_remaining;
|
|
|
|
/**
|
|
* @brief Master bio request
|
|
*/
|
|
struct bio *bio;
|
|
|
|
/**
|
|
* @brief Size of master request
|
|
*/
|
|
uint32_t master_size;
|
|
|
|
/**
|
|
* @brief CAS IO with which data is associated
|
|
*/
|
|
struct ocf_io *io;
|
|
|
|
/**
|
|
* @brief Timestamp of start processing request
|
|
*/
|
|
unsigned long long start_time;
|
|
|
|
/**
|
|
* @brief Request data siz
|
|
*/
|
|
uint32_t size;
|
|
|
|
/**
|
|
* @brief This filed indicates an error for request
|
|
*/
|
|
int error;
|
|
|
|
/**
|
|
* @brief Iterator for accessing data
|
|
*/
|
|
struct bio_vec_iter iter;
|
|
|
|
/**
|
|
* @brief Request data
|
|
*/
|
|
struct bio_vec vec[];
|
|
};
|
|
|
|
struct blk_data *cas_alloc_blk_data(uint32_t size, gfp_t flags);
|
|
void cas_free_blk_data(struct blk_data *data);
|
|
|
|
ctx_data_t *cas_ctx_data_alloc(uint32_t pages);
|
|
ctx_data_t *cas_ctx_data_zalloc(uint32_t pages);
|
|
void cas_ctx_data_free(ctx_data_t *ctx_data);
|
|
void cas_ctx_data_secure_erase(ctx_data_t *ctx_data);
|
|
|
|
int cas_initialize_context(void);
|
|
void cas_cleanup_context(void);
|
|
|
|
#endif /* __CONTEXT_H__ */
|