204 lines
7.4 KiB
C
204 lines
7.4 KiB
C
/* $NetBSD: mhavar.h,v 1.2 1998/11/19 21:50:30 thorpej Exp $ */
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/*
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* Copyright (c) 1994 Peter Galbavy. All rights reserved.
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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 Peter Galbavy.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* ACB. Holds additional information for each SCSI command Comments: We
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* need a separate scsi command block because we may need to overwrite it
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* with a request sense command. Basicly, we refrain from fiddling with
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* the scsi_xfer struct (except do the expected updating of return values).
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* We'll generally update: xs->{flags,resid,error,sense,status} and
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* occasionally xs->retries.
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*/
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struct acb {
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TAILQ_ENTRY(acb) chain;
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struct scsipi_xfer *xs; /* SCSI xfer ctrl block from above */
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int flags; /* Status */
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#define ACB_QNONE 0
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#define ACB_QFREE 1
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#define ACB_QREADY 2
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#define ACB_QNEXUS 3
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#define ACB_QBITS 0x07
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#define ACB_CHKSENSE 0x08
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#define ACB_ABORTED 0x10
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#define ACB_RESET 0x80
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#define ACB_SETQ(e, q) do (e)->flags = ((e)->flags&~ACB_QBITS)|(q); while(0)
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struct scsi_generic cmd; /* SCSI command block */
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int clen;
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char *daddr; /* Saved data pointer */
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int dleft; /* Residue */
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u_char stat; /* SCSI status byte */
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/* struct spc_dma_seg dma[SPC_NSEG];*/ /* Physical addresses+len */
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};
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/*
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* Some info about each (possible) target on the SCSI bus. This should
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* probably have been a "per target+lunit" structure, but we'll leave it at
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* this for now.
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*/
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struct spc_tinfo {
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int cmds; /* #commands processed */
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int dconns; /* #disconnects */
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int touts; /* #timeouts */
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int perrs; /* #parity errors */
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int senses; /* #request sense commands sent */
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ushort lubusy; /* What local units/subr. are busy? */
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u_char flags;
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#define T_NEED_TO_RESET 0x01 /* Should send a BUS_DEV_RESET */
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#define T_NEGOTIATE 0x02 /* (Re)Negotiate synchronous options */
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#define T_BUSY 0x04 /* Target is busy, i.e. cmd in progress */
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#define T_SYNCMODE 0x08 /* sync mode has been negotiated */
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#define T_SYNCHOFF 0x10 /* .. */
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#define T_RSELECTOFF 0x20 /* .. */
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u_char period; /* Period suggestion */
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u_char offset; /* Offset suggestion */
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u_char width; /* Width suggestion */
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} tinfo_t;
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struct mha_softc {
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struct device sc_dev; /* us as a device */
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volatile struct mb86601 *sc_iobase;
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volatile u_char *sc_pc;
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volatile u_short *sc_ps;
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volatile u_char *sc_pcx;
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struct scsipi_link sc_link; /* prototype for subdevs */
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struct scsipi_adapter sc_adapter;
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TAILQ_HEAD(, acb) free_list, ready_list, nexus_list;
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struct acb *sc_nexus; /* current command */
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struct acb sc_acb[8]; /* one per target */
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struct spc_tinfo sc_tinfo[8];
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/* Data about the current nexus (updated for every cmd switch) */
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u_char *sc_dp; /* Current data pointer */
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size_t sc_dleft; /* Data bytes left to transfer */
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u_char *sc_cp; /* Current command pointer */
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size_t sc_cleft; /* Command bytes left to transfer */
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/* Adapter state */
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int sc_phase; /* Copy of what bus phase we are in */
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int sc_prevphase; /* Copy of what bus phase we were in */
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u_char sc_state; /* State applicable to the adapter */
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u_char sc_flags;
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u_char sc_selid; /* Reselection ID */
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volatile u_char sc_spcinitialized; /* */
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/* Message stuff */
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u_char sc_msgpriq; /* Messages we want to send */
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u_char sc_msgout; /* What message is on its way out? */
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u_char sc_msgoutq; /* Messages sent during last MESSAGE OUT */
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u_char sc_lastmsg; /* Message last transmitted */
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u_char sc_currmsg; /* Message currently ready to transmit */
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#define SPC_MAX_MSG_LEN 8
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u_char sc_omess[SPC_MAX_MSG_LEN];
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u_char *sc_omp; /* Outgoing message pointer */
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u_char sc_imess[SPC_MAX_MSG_LEN];
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u_char *sc_imp; /* Incoming message pointer */
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size_t sc_imlen;
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/* Hardware stuff */
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int sc_freq; /* Clock frequency in MHz */
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int sc_id; /* our scsi id */
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int sc_minsync; /* Minimum sync period / 4 */
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int sc_maxsync; /* Maximum sync period / 4 */
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};
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/* values for sc_state */
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#define SPC_INIT 0x00
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#define SPC_IDLE 0x01 /* waiting for something to do */
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#define ESP_TMP_UNAVAIL 0x02 /* Don't accept SCSI commands */
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#define SPC_SELECTING 0x03 /* SCSI command is arbiting */
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#define SPC_RESELECTED 0x04 /* Has been reselected */
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#define SPC_HASNEXUS 0x05 /* Actively using the SCSI bus */
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#define SPC_CLEANING 0x06
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#define ESP_SBR 0x07 /* Expect a SCSI RST because we commanded it */
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#define SPC_CONNECTED 0x08 /* Actively using the SCSI bus */
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#define SPC_DISCONNECT 0x09 /* MSG_DISCONNECT received */
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#define SPC_CMDCOMPLETE 0x0a /* MSG_CMDCOMPLETE received */
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/* values for sc_flags */
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#define SPC_DROP_MSGI 0x01 /* Discard all msgs (parity err detected) */
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#define SPC_DOINGDMA 0x02 /* The FIFO data path is active! */
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#define SPC_BUSFREE_OK 0x04 /* Bus free phase is OK. */
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#define SPC_SYNCHNEGO 0x08 /* Synch negotiation in progress. */
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#define SPC_DISCON 0x10 /* Target sent DISCONNECT msg */
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#define SPC_ABORTING 0x20 /* Bailing out */
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#define ESP_ICCS 0x40 /* Expect status phase results */
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#define ESP_WAITI 0x80 /* Waiting for non-DMA data to arrive */
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/* values for sc_msgout */
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#define SEND_DEV_RESET 0x01
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#define SEND_PARITY_ERROR 0x02
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#define SEND_INIT_DET_ERR 0x04
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#define SEND_REJECT 0x08
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#define SEND_IDENTIFY 0x10
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#define SEND_ABORT 0x20
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#define SEND_SDTR 0x40
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#define SEND_WDTR 0x80
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/* SCSI Status codes */
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#define ST_GOOD 0x00
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#define ST_CHKCOND 0x02
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#define ST_CONDMET 0x04
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#define ST_BUSY 0x08
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#define ST_INTERMED 0x10
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#define ST_INTERMED_CONDMET 0x14
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#define ST_RESERVATION_CONFLICT 0x18
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#define ST_CMD_TERM 0x22
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#define ST_QUEUE_FULL 0x28
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#define ST_MASK 0x3e /* bit 0,6,7 is reserved */
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/* phase bits */
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#define IOI 0x01
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#define CDI 0x02
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#define MSGI 0x04
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/* Information transfer phases */
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#define DATA_OUT_PHASE (0)
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#define DATA_IN_PHASE (IOI)
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#define COMMAND_PHASE (CDI)
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#define STATUS_PHASE (CDI|IOI)
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#define MESSAGE_OUT_PHASE (MSGI|CDI)
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#define MESSAGE_IN_PHASE (MSGI|CDI|IOI)
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#define PHASE_MASK (MSGI|CDI|IOI)
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/* Some pseudo phases for getphase()*/
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#define BUSFREE_PHASE 0x100 /* Re/Selection no longer valid */
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#define INVALID_PHASE 0x101 /* Re/Selection valid, but no REQ yet */
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#define PSEUDO_PHASE 0x100 /* "pseudo" bit */
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