221 lines
7.4 KiB
C
221 lines
7.4 KiB
C
/* $NetBSD: sbicvar.h,v 1.2 2003/08/07 16:26:30 agc Exp $ */
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/*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Van Jacobson of Lawrence Berkeley Laboratory.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)scsivar.h 7.1 (Berkeley) 5/8/90
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*/
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#ifndef _SBICVAR_H_
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#define _SBICVAR_H_
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#include <sys/malloc.h>
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#include <sys/callout.h>
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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 sbic_acb {
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TAILQ_ENTRY(sbic_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_FREE 0x00
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#define ACB_ACTIVE 0x01
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#define ACB_DONE 0x02
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#define ACB_DATAIN 0x04 /* DMA direction flag */
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#define ACB_DMA 0x08 /* ACB using DMA this time */
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struct scsi_generic cmd; /* SCSI command block */
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int clen;
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bus_dmamap_t dmamap_xfer; /* Handle for dma */
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u_char *data; /* Data buffer... */
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int datalen; /* ... and its length. */
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int offset;
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u_long sc_tcnt; /* number of bytes for this DMA */
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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. Is there a way to reliably hook it up to sc->fordriver??
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*/
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struct sbic_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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u_char* bounce; /* Bounce buffer for this device */
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ushort lubusy; /* What local units/subr. are busy? */
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u_char flags;
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u_char period; /* Period suggestion */
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u_char offset; /* Offset suggestion */
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} tinfo_t;
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struct sbic_softc {
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struct device sc_dev;
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/* struct isr sc_isr;*/
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struct callout sc_timo_ch;
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struct target_sync {
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u_char state;
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u_char period;
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u_char offset;
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} sc_sync[8];
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u_char target; /* Currently active target */
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u_char lun;
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struct scsipi_channel sc_channel;
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struct scsipi_adapter sc_adapter;
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sbic_regmap sc_sbicp; /* Handle for the SBIC */
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volatile void *sc_cregs; /* driver specific regs */
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/* Lists of command blocks */
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TAILQ_HEAD(acb_list, sbic_acb) free_list,
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ready_list,
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nexus_list;
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struct sbic_acb *sc_nexus; /* current command */
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struct sbic_acb sc_acb[8]; /* the real command blocks */
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struct sbic_tinfo sc_tinfo[8];
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u_char sc_flags;
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u_char sc_scsiaddr;
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u_char sc_stat[2];
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u_char sc_msg[7];
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u_long sc_clkfreq;
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int sc_dmaflags; /* Target-specific busdma flags */
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void *sc_dmah; /* Interface specific dma handle */
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bus_dma_tag_t sc_dmat; /* Tag for dma accesses */
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int sc_max_dmalen; /* Maximum DMA segment length */
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int sc_dmamode; /* Machine-specific DMA mode for
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the SBIC chip */
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u_short sc_dmatimo; /* dma timeout */
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int (*sc_dmaok) (void *, bus_dma_tag_t, struct sbic_acb *);
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int (*sc_dmasetup) (void *, bus_dma_tag_t, struct sbic_acb *, int);
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int (*sc_dmanext) (void *, bus_dma_tag_t, struct sbic_acb *, int);
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void (*sc_dmastop) (void *, bus_dma_tag_t, struct sbic_acb *);
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void (*sc_dmafinish) (void *, bus_dma_tag_t, struct sbic_acb *);
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void (*sc_enintr) (struct sbic_softc *);
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};
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/* sc_flags */
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#define SBICF_ALIVE 0x01 /* controller initialized */
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#define SBICF_SELECTED 0x02 /* bus is in selected state. */
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#define SBICF_ICMD 0x04 /* Immediate command in execution */
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#define SBICF_BADDMA 0x08 /* controller can only DMA to ztwobus space */
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#define SBICF_NODMA 0x10 /* Don't use DMA */
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#define SBICF_INTR 0x20 /* SBICF interrupt expected */
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#define SBICF_INDMA 0x40 /* not used yet, DMA I/O in progress */
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/* sync states */
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#define SYNC_START 0 /* no sync handshake started */
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#define SYNC_SENT 1 /* we sent sync request, no answer yet */
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#define SYNC_DONE 2 /* target accepted our (or inferior) settings,
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or it rejected the request and we stay
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async */
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#ifdef DEBUG
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#define DDB_FOLLOW 0x04
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#define DDB_IO 0x08
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#endif
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extern u_char sbic_inhibit_sync[8];
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extern int sbic_no_dma;
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extern int sbic_clock_override;
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#define PHASE_MASK 0x07 /* mask for psns/pctl phase */
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#define DATA_OUT_PHASE 0x00
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#define DATA_IN_PHASE 0x01
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#define CMD_PHASE 0x02
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#define STATUS_PHASE 0x03
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#define BUS_FREE_PHASE 0x04
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#define ARB_SEL_PHASE 0x05 /* Fuji chip combines arbitration with sel. */
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#define MESG_OUT_PHASE 0x06
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#define MESG_IN_PHASE 0x07
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#define MSG_CMD_COMPLETE 0x00
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#define MSG_EXT_MESSAGE 0x01
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#define MSG_SAVE_DATA_PTR 0x02
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#define MSG_RESTORE_PTR 0x03
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#define MSG_DISCONNECT 0x04
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#define MSG_INIT_DETECT_ERROR 0x05
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#define MSG_ABORT 0x06
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#define MSG_REJECT 0x07
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#define MSG_NOOP 0x08
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#define MSG_PARITY_ERROR 0x09
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#define MSG_BUS_DEVICE_RESET 0x0C
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#define MSG_IDENTIFY 0x80
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#define MSG_IDENTIFY_DR 0xc0 /* (disconnect/reconnect allowed) */
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#define MSG_SYNC_REQ 0x01
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#define MSG_ISIDENTIFY(x) (x&MSG_IDENTIFY)
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#define IFY_TRN 0x20
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#define IFY_LUNTRN(x) (x&0x07)
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#define IFY_LUN(x) (!(x&0x20))
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/* Check if high bit set */
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#define STS_CHECKCOND 0x02 /* Check Condition (ie., read sense) */
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#define STS_CONDMET 0x04 /* Condition Met (ie., search worked) */
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#define STS_BUSY 0x08
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#define STS_INTERMED 0x10 /* Intermediate status sent */
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#define STS_EXT 0x80 /* Extended status valid */
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/* States returned by our state machine */
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#define SBIC_STATE_ERROR -1
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#define SBIC_STATE_DONE 0
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#define SBIC_STATE_RUNNING 1
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#define SBIC_STATE_DISCONNECT 2
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/*
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* XXXX
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*/
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struct scsi_fmt_cdb {
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int len; /* cdb length (in bytes) */
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u_char cdb[28]; /* cdb to use on next read/write */
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};
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struct buf;
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struct scsipi_xfer;
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void sbic_minphys (struct buf *bp);
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void sbic_scsi_request (struct scsipi_channel *,
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scsipi_adapter_req_t, void *);
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int sbicinit (struct sbic_softc *dev);
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int sbicintr (struct sbic_softc *);
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void sbic_dump (struct sbic_softc *dev);
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#endif /* _SBICVAR_H_ */
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