937a7a3ed9
This is a completely rewritten scsipi_xfer execution engine, and the associated changes to HBA drivers. Overview of changes & features: - All xfers are queued in the mid-layer, rather than doing so in an ad-hoc fashion in individual adapter drivers. - Adapter/channel resource management in the mid-layer, avoids even trying to start running an xfer if the adapter/channel doesn't have the resources. - Better communication between the mid-layer and the adapters. - Asynchronous event notification mechanism from adapter to mid-layer and peripherals. - Better peripheral queue management: freeze/thaw, sorted requeueing during recovery, etc. - Clean separation of peripherals, adapters, and adapter channels (no more scsipi_link). - Kernel thread for each scsipi_channel makes error recovery much easier (no more dealing with interrupt context when recovering from an error). - Mid-layer support for tagged queueing: commands can have the tag type set explicitly, tag IDs are allocated in the mid-layer (thus eliminating the need to use buggy tag ID allocation schemes in many adapter drivers). - support for QUEUE FULL and CHECK CONDITION status in mid-layer; the command will be requeued, or a REQUEST SENSE will be sent as appropriate. Just before the merge syssrc has been tagged with thorpej_scsipi_beforemerge
244 lines
7.2 KiB
C
244 lines
7.2 KiB
C
/* $NetBSD: scsi_tape.h,v 1.20 2001/04/25 17:53:39 bouyer 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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.
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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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*/
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/*
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* SCSI tape interface description
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*/
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/*
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* SCSI command formats
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*/
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#define READ 0x08
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#define WRITE 0x0a
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struct scsi_rw_tape {
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u_int8_t opcode;
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u_int8_t byte2;
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#define SRW_FIXED 0x01
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u_int8_t len[3];
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u_int8_t control;
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};
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#define SPACE 0x11
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struct scsi_space {
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u_int8_t opcode;
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u_int8_t byte2;
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#define SS_CODE 0x03
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#define SP_BLKS 0x00
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#define SP_FILEMARKS 0x01
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#define SP_SEQ_FILEMARKS 0x02
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#define SP_EOM 0x03
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u_int8_t number[3];
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u_int8_t control;
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};
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#define WRITE_FILEMARKS 0x10
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struct scsi_write_filemarks {
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u_int8_t opcode;
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u_int8_t byte2;
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u_int8_t number[3];
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u_int8_t control;
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};
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#define REWIND 0x01
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struct scsi_rewind {
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u_int8_t opcode;
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u_int8_t byte2;
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#define SR_IMMED 0x01
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u_int8_t unused[3];
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u_int8_t control;
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};
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#define LOAD 0x1b
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struct scsi_load {
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u_int8_t opcode;
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u_int8_t byte2;
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#define SL_IMMED 0x01
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u_int8_t unused[2];
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u_int8_t how;
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#define LD_UNLOAD 0x00
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#define LD_LOAD 0x01
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#define LD_RETENSION 0x02
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u_int8_t control;
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};
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#define ERASE 0x19
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struct scsi_erase {
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u_int8_t opcode;
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u_int8_t byte2;
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#define SE_LONG 0x01
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#define SE_IMMED 0x02
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u_int8_t unused[3];
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u_int8_t control;
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};
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#define READ_BLOCK_LIMITS 0x05
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struct scsi_block_limits {
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u_int8_t opcode;
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u_int8_t byte2;
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u_int8_t unused[3];
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u_int8_t control;
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};
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struct scsi_block_limits_data {
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u_int8_t reserved;
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u_int8_t max_length[3]; /* Most significant */
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u_int8_t min_length[2]; /* Most significant */
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};
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/* See SCSI-II spec 9.3.3.1 */
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struct scsi_tape_dev_conf_page {
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u_int8_t pagecode; /* 0x10 */
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u_int8_t pagelength; /* 0x0e */
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u_int8_t byte2;
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#define SMT_CAP 0x40 /* change active partition */
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#define SMT_CAF 0x20 /* change active format */
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#define SMT_AFMASK 0x1f /* active format mask */
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u_int8_t active_partition;
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u_int8_t wb_full_ratio;
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u_int8_t rb_empty_ratio;
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u_int8_t wrdelay_time[2];
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u_int8_t byte8;
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#define SMT_DBR 0x80 /* data buffer recovery */
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#define SMT_BIS 0x40 /* block identifiers supported */
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#define SMT_RSMK 0x20 /* report setmarks */
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#define SMT_AVC 0x10 /* automatic velocity control */
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#define SMT_SOCF_MASK 0xc0 /* stop on consecutive formats */
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#define SMT_RBO 0x20 /* recover buffer order */
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#define SMT_REW 0x10 /* report early warning */
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u_int8_t gap_size;
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u_int8_t byte10;
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#define SMT_EODDEFINED 0xe0 /* EOD defined */
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#define SMT_EEG 0x10 /* enable EOD generation */
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#define SMT_SEW 0x80 /* synchronize at early warning */
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u_int8_t ew_bufsize[3];
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u_int8_t sel_comp_alg;
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#define SMT_COMP_NONE 0x00
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#define SMT_COMP_DEFAULT 0x01
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u_int8_t reserved;
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};
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/* from SCSI-3: SSC-Rev10 (6/97) */
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struct scsi_tape_dev_compression_page {
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u_int8_t pagecode; /* 0x0f */
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u_int8_t pagelength; /* 0x0e */
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u_int8_t dce_dcc;
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#define DCP_DCE 0x80 /* enable compression */
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#define DCP_DCC 0x40 /* compression capable */
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u_int8_t dde_red;
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#define DCP_DDE 0x80 /* enable decompression */
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/* There's a lot of gup about bits 5,6 for reporting exceptions */
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/* in transitions between compressed and uncompressed data- but */
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/* mostly we want the default (0), which is to report a MEDIUM */
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/* ERROR when a read transitions into data that can't be de- */
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/* compressed */
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u_int8_t comp_alg[4]; /* compression algorithm */
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u_int8_t decomp_alg[4]; /* de-"" */
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u_int8_t reserved[4];
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};
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/* defines for the device specific byte in the mode select/sense header */
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#define SMH_DSP_SPEED 0x0F
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#define SMH_DSP_BUFF_MODE 0x70
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#define SMH_DSP_BUFF_MODE_OFF 0x00
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#define SMH_DSP_BUFF_MODE_ON 0x10
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#define SMH_DSP_BUFF_MODE_MLTI 0x20
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#define SMH_DSP_WRITE_PROT 0x80
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/* A special for the CIPHER ST150S(old drive) */
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struct block_desc_cipher {
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u_int8_t density;
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u_int8_t nblocks[3];
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u_int8_t reserved;
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u_int8_t blklen[3];
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u_int8_t other;
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#define ST150_SEC 0x01 /* soft error count */
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#define SR150_AUI 0x02 /* autoload inhibit */
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};
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#define READ_POSITION 0x34
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struct scsi_tape_read_position {
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u_int8_t opcode; /* READ_POSITION */
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u_int8_t byte1; /* set LSB to read hardware block pos */
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u_int8_t reserved[8];
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};
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#define LOCATE 0x2B
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struct scsi_tape_locate {
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u_int8_t opcode;
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u_int8_t byte2;
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u_int8_t reserved1;
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u_int8_t blkaddr[4];
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u_int8_t reserved2;
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u_int8_t partition;
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u_int8_t control;
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};
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#define HALFINCH_800 0x01
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#define HALFINCH_1600 0x02
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#define HALFINCH_6250 0x03
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#define QIC_11 0x04 /* from Archive 150S Theory of Op. XXX */
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#define QIC_24 0x05 /* may be bad, works for CIPHER ST150S XXX */
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#define QIC_120 0x0f
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#define QIC_150 0x10
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#define QIC_320 0x11
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#define QIC_525 0x11
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#define QIC_1320 0x12
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#define DDS 0x13
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#define DAT_1 0x13
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#define QIC_3095 0x45
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#define QIC_3220 0x47
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