184 lines
7.8 KiB
C
184 lines
7.8 KiB
C
/* $NetBSD: stvar.h,v 1.26 2018/03/24 08:08:19 mlelstv Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Originally written by Julian Elischer (julian@tfs.com)
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* for TRW Financial Systems for use under the MACH(2.5) operating system.
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*
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* TRW Financial Systems, in accordance with their agreement with Carnegie
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* Mellon University, makes this software available to CMU to distribute
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* or use in any manner that they see fit as long as this message is kept with
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* the software. For this reason TFS also grants any other persons or
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* organisations permission to use or modify this software.
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*
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* TFS supplies this software to be publicly redistributed
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* on the understanding that TFS is not responsible for the correct
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* functioning of this software in any circumstances.
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*
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* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
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* major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993
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*
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* A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov).
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*/
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#include <sys/rndsource.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsiconf.h>
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#define ST_IO_TIME (3 * 60 * 1000) /* 3 minutes */
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#define ST_CTL_TIME (30 * 1000) /* 30 seconds */
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#define ST_SPC_TIME (4 * 60 * 60 * 1000) /* 4 hours */
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#define ST_RETRIES 4 /* only on non IO commands */
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struct modes {
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u_int quirks; /* same definitions as in quirkdata */
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int blksize;
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uint8_t density;
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};
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struct quirkdata {
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u_int quirks;
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#define ST_Q_FORCE_BLKSIZE 0x0001
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#define ST_Q_SENSE_HELP 0x0002 /* must do READ for good MODE SENSE */
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#define ST_Q_IGNORE_LOADS 0x0004
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#define ST_Q_BLKSIZE 0x0008 /* variable-block media_blksize > 0 */
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#define ST_Q_UNIMODAL 0x0010 /* unimode drive rejects mode select */
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#define ST_Q_NOPREVENT 0x0020 /* does not support PREVENT */
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#define ST_Q_ERASE_NOIMM 0x0040 /* drive rejects ERASE/w Immed bit */
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#define ST_Q_NOFILEMARKS 0x0080 /* can only write 0 filemarks */
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u_int page_0_size;
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#define MAX_PAGE_0_SIZE 64
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struct modes modes[4];
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};
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struct st_quirk_inquiry_pattern {
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struct scsipi_inquiry_pattern pattern;
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struct quirkdata quirkdata;
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};
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struct st_softc {
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device_t sc_dev;
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/*--------------------callback to bus-specific code--------------------------*/
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int (*ops)(struct st_softc *, int, int);
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#define ST_OPS_RBL 0x00 /* read block limit */
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#define ST_OPS_MODESENSE 0x01 /* mode sense */
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#define ST_OPS_MODESELECT 0x02 /* mode select */
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#define ST_OPS_CMPRSS_ON 0x03 /* turn on compression */
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#define ST_OPS_CMPRSS_OFF 0x04 /* turn off compression */
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/*--------------------present operating parameters, flags etc.---------------*/
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int flags; /* see below */
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u_int quirks; /* quirks for the open mode */
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int blksize; /* blksize we are using */
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uint8_t density; /* present density */
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u_int page_0_size; /* size of page 0 data */
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u_int last_dsty; /* last density opened */
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short mt_resid; /* last (short) resid */
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short mt_erreg; /* last error (sense key) seen */
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/* relative to BOT location */
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daddr_t fileno;
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daddr_t blkno;
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int32_t last_io_resid;
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int32_t last_ctl_resid;
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#define mt_key mt_erreg
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uint8_t asc; /* last asc code seen */
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uint8_t ascq; /* last asc code seen */
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/*--------------------device/scsi parameters---------------------------------*/
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struct scsipi_periph *sc_periph;/* our link to the adpter etc. */
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/*--------------------parameters reported by the device ---------------------*/
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int blkmin; /* min blk size */
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int blkmax; /* max blk size */
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const struct quirkdata *quirkdata; /* if we have a rogue entry */
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/*--------------------parameters reported by the device for this media-------*/
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u_long numblks; /* nominal blocks capacity */
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int media_blksize; /* 0 if not ST_FIXEDBLOCKS */
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uint8_t media_density; /* this is what it said when asked */
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/*--------------------quirks for the whole drive-----------------------------*/
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u_int drive_quirks; /* quirks of this drive */
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/*--------------------How we should set up when opening each minor device----*/
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struct modes modes[4]; /* plus more for each mode */
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uint8_t modeflags[4]; /* flags for the modes */
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#define DENSITY_SET_BY_USER 0x01
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#define DENSITY_SET_BY_QUIRK 0x02
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#define BLKSIZE_SET_BY_USER 0x04
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#define BLKSIZE_SET_BY_QUIRK 0x08
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/*--------------------storage for sense data returned by the drive-----------*/
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u_char sense_data[MAX_PAGE_0_SIZE]; /*
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* additional sense data needed
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* for mode sense/select.
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*/
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struct bufq_state *buf_queue; /* the queue of pending IO */
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/* operations */
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struct bufq_state *buf_defer; /* the queue of deferred IO */
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/* operations */
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struct callout sc_callout; /* restarting the queue after */
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/* transient error */
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struct io_stats *stats; /* statistics for the drive */
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krndsource_t rnd_source;
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kmutex_t sc_iolock;
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};
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#define ST_INFO_VALID 0x0001
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#define ST_BLOCK_SET 0x0002 /* block size, mode set by ioctl */
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#define ST_WRITTEN 0x0004 /* data has been written, EOD needed */
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#define ST_FIXEDBLOCKS 0x0008
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#define ST_AT_FILEMARK 0x0010
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#define ST_EIO_PENDING 0x0020 /* error reporting deferred until next op */
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#define ST_NEW_MOUNT 0x0040 /* still need to decide mode */
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#define ST_READONLY 0x0080 /* st_mode_sense says write protected */
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#define ST_FM_WRITTEN 0x0100 /*
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* EOF file mark written -- used with
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* ~ST_WRITTEN to indicate that multiple file
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* marks have been written
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*/
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#define ST_BLANK_READ 0x0200 /* BLANK CHECK encountered already */
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#define ST_2FM_AT_EOD 0x0400 /* write 2 file marks at EOD */
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#define ST_MOUNTED 0x0800 /* Device is presently mounted */
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#define ST_DONTBUFFER 0x1000 /* Disable buffering/caching */
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#define ST_EARLYWARN 0x2000 /* Do (deferred) EOM for variable mode */
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#define ST_EOM_PENDING 0x4000 /* EOM reporting deferred until next op */
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#define ST_POSUPDATED 0x8000 /* tape position already updated */
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#define ST_PER_ACTION (ST_AT_FILEMARK | ST_EIO_PENDING | ST_EOM_PENDING | \
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ST_BLANK_READ)
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#define ST_PER_MOUNT (ST_INFO_VALID | ST_BLOCK_SET | ST_WRITTEN | \
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ST_FIXEDBLOCKS | ST_READONLY | ST_FM_WRITTEN | \
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ST_2FM_AT_EOD | ST_PER_ACTION | ST_POSUPDATED)
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void stattach(device_t, device_t, void *);
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int stdetach(device_t, int);
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int st_mode_select(struct st_softc *, int);
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extern struct cfdriver st_cd;
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