/*-
 *   BSD LICENSE
 *
 *   Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
 *   Copyright (c) Intel Corporation.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef SPDK_SCSI_INTERNAL_H
#define SPDK_SCSI_INTERNAL_H

#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/uio.h>

#include "spdk/bdev.h"
#include "spdk/scsi.h"
#include "spdk/scsi_spec.h"
#include "spdk/trace.h"

#include "spdk_internal/log.h"


/**
 * Macro to return the minimum of two numbers
 */
#define SPDK_MIN(a, b) ({ \
		typeof (a) _a = (a); \
		typeof (b) _b = (b); \
		_a < _b ? _a : _b; \
	})

/**
 * Macro to return the maximum of two numbers
 */
#define SPDK_MAX(a, b) ({ \
		typeof (a) _a = (a); \
		typeof (b) _b = (b); \
		_a > _b ? _a : _b; \
	})

enum {
	SPDK_SCSI_TASK_UNKNOWN = -1,
	SPDK_SCSI_TASK_COMPLETE,
	SPDK_SCSI_TASK_PENDING,
};

struct spdk_lun_db_entry {
	struct spdk_scsi_lun *lun;
	int claimed;
	struct spdk_lun_db_entry *next;
};

extern struct spdk_lun_db_entry *spdk_scsi_lun_list_head;

/* This typedef exists to work around an astyle 2.05 bug.
 * Remove it when astyle is fixed.
 */
typedef struct spdk_scsi_lun _spdk_scsi_lun;

_spdk_scsi_lun *spdk_scsi_lun_construct(const char *name, struct spdk_bdev *bdev);
int spdk_scsi_lun_destruct(struct spdk_scsi_lun *lun);

void spdk_scsi_lun_clear_all(struct spdk_scsi_lun *lun);
int spdk_scsi_lun_append_task(struct spdk_scsi_lun *lun, struct spdk_scsi_task *task);
void spdk_scsi_lun_execute_tasks(struct spdk_scsi_lun *lun);
int spdk_scsi_lun_task_mgmt_execute(struct spdk_scsi_task *task);
void spdk_scsi_lun_complete_task(struct spdk_scsi_lun *lun, struct spdk_scsi_task *task);
int spdk_scsi_lun_claim(struct spdk_scsi_lun *lun);
int spdk_scsi_lun_unclaim(struct spdk_scsi_lun *lun);
int spdk_scsi_lun_deletable(const char *name);
void spdk_scsi_lun_delete(const char *lun_name);
int spdk_scsi_lun_allocate_io_channel(struct spdk_scsi_lun *lun);
void spdk_scsi_lun_free_io_channel(struct spdk_scsi_lun *lun);

int spdk_scsi_lun_db_add(struct spdk_scsi_lun *lun);
int spdk_scsi_lun_db_delete(struct spdk_scsi_lun *lun);

struct spdk_scsi_lun *spdk_lun_db_get_lun(const char *lun_name, int claim_flag);
void spdk_lun_db_put_lun(const char *lun_name);

struct spdk_scsi_dev *spdk_scsi_dev_get_list(void);

int spdk_bdev_scsi_execute(struct spdk_bdev *bdev, struct spdk_scsi_task *task);
int spdk_bdev_scsi_reset(struct spdk_bdev *bdev, struct spdk_scsi_task *task);

void spdk_scsi_nvme_translate(struct spdk_bdev_io *bdev_io, int *sc, int *sk, int *asc, int *ascq);

struct spdk_scsi_parameters {
	uint32_t max_unmap_lba_count;
	uint32_t max_unmap_block_descriptor_count;
	uint32_t optimal_unmap_granularity;
	uint32_t unmap_granularity_alignment;
	uint32_t ugavalid;
	uint64_t max_write_same_length;
};

struct spdk_scsi_globals {
	pthread_mutex_t mutex;
	struct spdk_scsi_parameters scsi_params;
};

extern struct spdk_scsi_globals g_spdk_scsi;

#endif /* SPDK_SCSI_INTERNAL_H */