207 lines
7.9 KiB
C
207 lines
7.9 KiB
C
/* $NetBSD: sbicvar.h,v 1.13 2005/12/11 12:18:17 christos 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/callout.h>
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#include <sys/malloc.h>
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/*
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* DMA chains are used for Scatter-Gather DMA.
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*/
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struct dma_chain {
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int dc_count;
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char *dc_addr;
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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 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 0x04
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#define ACB_BBUF 0x10 /* DMA input needs to be copied from bounce */
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#define ACB_DATAIN 0x20 /* DMA direction flag */
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struct scsipi_generic cmd; /* SCSI command block */
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int clen;
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struct dma_chain sc_kv; /* Virtual address of whole DMA */
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struct dma_chain sc_pa; /* Physical address of DMA segment */
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u_long sc_tcnt; /* number of bytes for this DMA */
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u_short sc_dmacmd; /* Internal data for this DMA */
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char *pa_addr; /* XXXX initial phys addr */
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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 lubusy; /* What local units/subr. are busy? */
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};
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struct sbic_softc {
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struct device sc_dev;
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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; /* proto for sub devices */
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struct scsipi_adapter sc_adapter;
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sbic_regmap_p sc_sbicp; /* the SBIC */
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void *sc_driver; /* driver specific field */
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int sc_ipl;
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struct callout sc_timo_ch;
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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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struct scsipi_xfer *sc_xs; /* transfer from high level code */
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u_char sc_flags;
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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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u_long sc_tcnt; /* number of bytes transfered */
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u_short sc_dmacmd; /* used by DMA drivers */
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u_long sc_dmamask; /* DMA valid mem mask */
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#ifdef DEBUG
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u_short sc_dmatimo; /* DMA timeout */
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#endif
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struct dma_chain *sc_cur;
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struct dma_chain *sc_last;
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int (*sc_dmago) __P((struct sbic_softc *, char *, int, int));
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int (*sc_dmanext) __P((struct sbic_softc *));
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void (*sc_enintr) __P((struct sbic_softc *));
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void (*sc_dmastop) __P((struct sbic_softc *));
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};
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/*
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* sc_flags
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*/
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#define SBICF_ALIVE 0x01 /* controller initialized */
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#define SBICF_DCFLUSH 0x02 /* need flush for overlap after DMA finishes */
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#define SBICF_SELECTED 0x04 /* bus is in selected state. */
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#define SBICF_ICMD 0x08 /* Immediate command in execution */
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#define SBICF_BADDMA 0x10 /* controller can only DMA to ztwobus space */
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#define SBICF_INTR 0x40 /* SBICF interrupt expected */
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#define SBICF_INDMA 0x80 /* not used yet, DMA I/O in progress */
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/*
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* sync states
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*/
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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 async */
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#define PHASE 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 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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/*
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* States returned by our state machine
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*/
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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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struct buf;
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struct scsipi_xfer;
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void sbic_minphys __P((struct buf *bp));
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void sbic_scsi_request __P((struct scsipi_channel *,
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scsipi_adapter_req_t, void *));
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void sbicinit __P((struct sbic_softc *));
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int sbicintr __P((struct sbic_softc *));
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#endif /* _SBICVAR_H_ */
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