freebsd-dev/sys/dev/ata/atapi-tape.h

/*-
 * Copyright (c) 1998 - 2003 S<EFBFBD>ren Schmidt <sos@FreeBSD.org>
 * 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. 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.
 * 3. 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 ``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 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.
 *
 * $FreeBSD$
 */

/* ATAPI tape drive Capabilities and Mechanical Status Page */
struct ast_cappage {
    /* mode page data header */
    u_int8_t	data_length;			/* total length of data */
    u_int8_t	medium_type;			/* medium type (if any) */
    u_int8_t	reserved	:4;
    u_int8_t	mode		:3;		/* buffering mode */
    u_int8_t	write_protect	:1;		/* media is writeprotected */
    u_int8_t	blk_desc_len;			/* block Descriptor Length */

    /* capabilities page */
    u_int8_t	page_code	:6;
#define ATAPI_TAPE_CAP_PAGE	0x2a

    u_int8_t	reserved0_6	:1;
    u_int8_t	ps		:1;		/* parameters saveable */
    u_int8_t	page_length;			/* page Length == 0x12 */
    u_int8_t	reserved2;
    u_int8_t	reserved3;
    u_int8_t	readonly	:1;		/* read Only Mode */
    u_int8_t	reserved4_1234	:4;
    u_int8_t	reverse		:1;		/* supports reverse direction */
    u_int8_t	reserved4_67	:2;
    u_int8_t	reserved5_012	:3;
    u_int8_t	eformat		:1;		/* supports ERASE formatting */
    u_int8_t	reserved5_4	:1;
    u_int8_t	qfa		:1;		/* supports QFA formats */
    u_int8_t	reserved5_67	:2;
    u_int8_t	lock		:1;		/* supports locking media */
    u_int8_t	locked		:1;		/* the media is locked */
    u_int8_t	prevent		:1;		/* defaults to prevent state */
    u_int8_t	eject		:1;		/* supports eject */
    u_int8_t	disconnect	:1;		/* can break request > ctl */
    u_int8_t	reserved6_5	:1;
    u_int8_t	ecc		:1;		/* supports error correction */
    u_int8_t	compress	:1;		/* supports data compression */
    u_int8_t	reserved7_0	:1;
    u_int8_t	blk512		:1;		/* supports 512b block size */
    u_int8_t	blk1024		:1;		/* supports 1024b block size */
    u_int8_t	reserved7_3456	:4;
    u_int8_t	blk32k		:1;		/* supports 32kb block size */
    u_int16_t	max_speed;			/* supported speed in KBps */
    u_int16_t	max_defects;			/* max stored defect entries */
    u_int16_t	ctl;				/* continuous transfer limit */
    u_int16_t	speed;				/* current Speed, in KBps */
    u_int16_t	buffer_size;			/* buffer Size, in 512 bytes */
    u_int8_t	reserved18;
    u_int8_t	reserved19;
};

/* ATAPI OnStream ADR data transfer mode page (ADR unique) */
struct ast_transferpage {
    /* mode page data header */
    u_int8_t	data_length;			/* total length of data */
    u_int8_t	medium_type;			/* medium type (if any) */
    u_int8_t	dsp;				/* device specific parameter */
    u_int8_t	blk_desc_len;			/* block Descriptor Length */

    /* data transfer page */
    u_int8_t	page_code	:6;
#define ATAPI_TAPE_TRANSFER_PAGE     0x30

    u_int8_t	reserved0_6	:1;
    u_int8_t	ps		:1;		/* parameters saveable */
    u_int8_t	page_length;			/* page Length == 0x02 */
    u_int8_t	reserved2;
    u_int8_t	read32k		:1;		/* 32k blk size (data only) */
    u_int8_t	read32k5	:1;		/* 32.5k blk size (data&AUX) */
    u_int8_t	reserved3_23	:2;
    u_int8_t	write32k	:1;		/* 32k blk size (data only) */
    u_int8_t	write32k5	:1;		/* 32.5k blk size (data&AUX) */
    u_int8_t	reserved3_6	:1;
    u_int8_t	streaming	:1;		/* streaming mode enable */
};

/* ATAPI OnStream ADR vendor identification mode page (ADR unique) */
struct ast_identifypage {
    /* mode page data header */
    u_int8_t	data_length;			/* total length of data */
    u_int8_t	medium_type;			/* medium type (if any) */
    u_int8_t	dsp;				/* device specific parameter */
    u_int8_t	blk_desc_len;			/* block Descriptor Length */

    /* data transfer page */
    u_int8_t	page_code	:6;
#define ATAPI_TAPE_IDENTIFY_PAGE     0x36

    u_int8_t	reserved0_6	:1;
    u_int8_t	ps		:1;		/* parameters saveable */
    u_int8_t	page_length;			/* page Length == 0x06 */
    u_int8_t	ident[4];			/* host id string */
    u_int8_t	reserved6;
    u_int8_t	reserved7;
};

/* ATAPI read position structure */
struct ast_readposition {
    u_int8_t	reserved0_05	:6;
    u_int8_t	eop		:1;		/* end of partition */
    u_int8_t	bop		:1;		/* beginning of partition */
    u_int8_t	reserved1;
    u_int8_t	reserved2;
    u_int8_t	reserved3;
    u_int32_t	host;				/* frame address in buffer */
    u_int32_t	tape;				/* frame address on tape */
    u_int8_t	reserved12;
    u_int8_t	reserved13;
    u_int8_t	reserved14;
    u_int8_t	blks_in_buf;			/* blocks in buffer */
    u_int8_t	reserved16;
    u_int8_t	reserved17;
    u_int8_t	reserved18;
    u_int8_t	reserved19;
};

struct ast_softc {
    struct ata_device		*device;	/* device softc */
    int				lun;		/* logical device unit */
    int				flags;		/* device state flags */
#define		F_CTL_WARN		0x0001	/* warned about CTL wrong? */
#define		F_WRITEPROTECT		0x0002	/* media is writeprotected */
#define		F_DATA_WRITTEN		0x0004	/* data has been written */
#define		F_FM_WRITTEN		0x0008	/* filemark has been written */
#define		F_ONSTREAM		0x0100	/* OnStream ADR device */

    int				blksize;	/* block size (512 | 1024) */
    struct mtx			queue_mtx;	/* queue lock */
    struct bio_queue_head	queue;		/* queue of i/o requests */
    struct atapi_params		*param;		/* drive parameters table */
    struct ast_cappage		cap;		/* capabilities page info */
    struct devstat		*stats;		/* devstat entry */
    dev_t			dev1, dev2;	/* device place holders */
};