/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* SCSI Target Emulator
*
* Copyright (c) 2002 Nate Lawson.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 _SCSI_TARGET_H
#define _SCSI_TARGET_H
/*
* Maximum number of parallel commands to accept,
* 1024 for Fibre Channel (SPI is 16).
*/
#define MAX_INITIATORS 8
#define SECTOR_SIZE 512
#define MAX_EVENTS (MAX_INITIATORS + 5)
/* kqueue for AIO, signals */
/* Additional SCSI 3 defines for inquiry response */
#define SID_Addr16 0x0100
TAILQ_HEAD(io_queue, ccb_hdr);
/* Offset into the private CCB area for storing our descriptor */
#define targ_descr periph_priv.entries[1].ptr
/* Descriptor attached to each ATIO */
struct atio_descr {
off_t base_off; /* Base offset for ATIO */
uint total_len; /* Total xfer len for this ATIO */
uint init_req; /* Transfer count requested to/from init */
uint init_ack; /* Data transferred ok to/from init */
uint targ_req; /* Transfer count requested to/from target */
uint targ_ack; /* Data transferred ok to/from target */
int flags; /* Flags for CTIOs */
u_int8_t *cdb; /* Pointer to received CDB */
/* List of completed AIO/CTIOs */
struct io_queue cmplt_io;
};
typedef enum {
ATIO_WORK,
AIO_DONE,
CTIO_DONE
} io_ops;
/* Descriptor attached to each CTIO */
struct ctio_descr {
void *buf; /* Backing store */
off_t offset; /* Position in transfer (for file, */
/* doesn't start at 0) */
struct aiocb aiocb; /* AIO descriptor for this CTIO */
struct ccb_accept_tio *atio;
/* ATIO we are satisfying */
io_ops event; /* Event that queued this CTIO */
};
typedef enum {
UA_NONE = 0x00,
UA_POWER_ON = 0x01,
UA_BUS_RESET = 0x02,
UA_BDR = 0x04
} ua_types;
typedef enum {
CA_NONE = 0x00,
CA_UNIT_ATTN = 0x01,
CA_CMD_SENSE = 0x02
} ca_types;
struct initiator_state {
ua_types orig_ua;
ca_types orig_ca;
ua_types pending_ua;
ca_types pending_ca;
struct scsi_sense_data sense_data;
};
/* Global functions */
extern cam_status tcmd_init(u_int16_t req_inq_flags,
u_int16_t sim_inq_flags);
extern int tcmd_handle(struct ccb_accept_tio *atio,
struct ccb_scsiio *ctio, io_ops event);
extern void tcmd_sense(u_int init_id, struct ccb_scsiio *ctio,
u_int8_t flags,
u_int8_t asc, u_int8_t ascq);
extern void tcmd_ua(u_int init_id, ua_types new_ua);
extern int work_atio(struct ccb_accept_tio *atio);
extern void send_ccb(union ccb *ccb, int priority);
extern void free_ccb(union ccb *ccb);
static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); }
/* Global Data */
extern int notaio;
/*
* Compat Defines
*/
#if __FreeBSD_version >= 500000
#define OFF_FMT "%ju"
#else
#define OFF_FMT "%llu"
#endif
#endif /* _SCSI_TARGET_H */
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