253 lines
9.4 KiB
C
253 lines
9.4 KiB
C
/* $NetBSD: osiopvar.h,v 1.3 2002/05/14 02:58:35 matt Exp $ */
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/*
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* Copyright (c) 2001 Izumi Tsutsui. 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. 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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* 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. 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 University of
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* California, Berkeley and its contributors.
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* 4. 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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* @(#)siopvar.h 7.1 (Berkeley) 5/8/90
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*/
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#define osiop_read_1(sc, reg) \
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bus_space_read_1((sc)->sc_bst, (sc)->sc_reg, reg)
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#define osiop_write_1(sc, reg, val) \
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bus_space_write_1((sc)->sc_bst, (sc)->sc_reg, reg, val)
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#define osiop_read_4(sc, reg) \
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bus_space_read_4((sc)->sc_bst, (sc)->sc_reg, reg)
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#define osiop_write_4(sc, reg, val) \
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bus_space_write_4((sc)->sc_bst, (sc)->sc_reg, reg, val)
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/*
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* The largest single request will be MAXPHYS bytes which will require
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* at most MAXPHYS/NBPG+1 chain elements to describe, i.e. if none of
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* the buffer pages are physically contiguous (MAXPHYS/NBPG) and the
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* buffer is not page aligned (+1).
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*/
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/* XXX This should be (MAXPHYS / NBPG + 1), but hardcoded in script */
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#define OSIOP_NSG (16 + 1)
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#if MAXPHYS > (PAGE_SIZE * (OSIOP_NSG - 1))
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#define OSIOP_MAX_XFER (PAGE_SIZE * (OSIOP_NSG - 1))
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#else
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#define OSIOP_MAX_XFER MAXPHYS
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#endif
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#define OSIOP_NTGT 8
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#define OSIOP_NACB 32 /* XXX (PAGE_SIZE / sizeof(osiop_ds)) is better? */
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/*
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* Data Structure for SCRIPTS program
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*/
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typedef struct buf_table {
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u_int32_t count;
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u_int32_t addr;
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} buf_table_t;
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struct osiop_ds {
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u_int32_t scsi_addr; /* SCSI ID & sync */
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u_int32_t pad1;
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buf_table_t id; /* Identify message */
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buf_table_t cmd; /* SCSI command */
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buf_table_t status; /* Status */
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buf_table_t msg; /* Message */
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buf_table_t msgin; /* Message in */
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buf_table_t extmsg; /* Extended message in */
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buf_table_t synmsg; /* Sync transfer request */
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buf_table_t data[OSIOP_NSG]; /* DMA S/G buffers */
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u_int8_t msgout[8];
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u_int8_t msgbuf[8];
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u_int8_t stat[8];
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} __attribute__((__packed__));
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/* status can hold the SCSI_* status values, and 2 additionnal values: */
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#define SCSI_OSIOP_NOCHECK 0xfe /* don't check the scsi status */
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#define SCSI_OSIOP_NOSTATUS 0xff /* device didn't report status */
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#define MSG_INVALID 0xff /* dummy value for message buffer */
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#define OSIOP_DSOFF(x) offsetof(struct osiop_ds, x)
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#define OSIOP_DSIDOFF OSIOP_DSOFF(msgout[0])
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#define OSIOP_DSMSGOFF OSIOP_DSOFF(msgbuf[0])
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#define OSIOP_DSMSGINOFF OSIOP_DSOFF(msgbuf[1])
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#define OSIOP_DSEXTMSGOFF OSIOP_DSOFF(msgbuf[2])
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#define OSIOP_DSSYNMSGOFF OSIOP_DSOFF(msgbuf[3])
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#define OSIOP_DSSTATOFF OSIOP_DSOFF(stat[0])
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/*
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* ACB. Holds additional information for each SCSI command Comments:
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* Basicly, we refrain from fiddling with the scsi_xfer struct
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* (except do the expected updating of return values).
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* We'll generally update: xs->{flags,resid,error,status} and
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* occasionally xs->retries.
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*/
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struct osiop_acb {
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TAILQ_ENTRY(osiop_acb) chain;
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struct scsipi_xfer *xs; /* SCSI xfer ctrl block from upper layer */
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struct osiop_softc *sc; /* points back to our adapter */
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bus_dmamap_t cmddma; /* DMA map for SCSI command */
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bus_dmamap_t datadma; /* DMA map for data transfer */
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struct osiop_ds *ds; /* data structure for this acb */
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bus_size_t dsoffset; /* offset of data structure for this acb */
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bus_size_t cmdlen; /* command length */
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bus_size_t datalen; /* transfer data length */
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#ifdef OSIOP_DEBUG
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void *data; /* transfer data buffer ptr */
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#endif
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bus_addr_t curaddr; /* current transfer data buffer */
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bus_size_t curlen; /* current transfer data length */
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int status; /* status of this acb */
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/* status defs */
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#define ACB_S_FREE 0 /* cmd slot is free */
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#define ACB_S_READY 1 /* cmd slot is waiting for processing */
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#define ACB_S_ACTIVE 2 /* cmd slot is being processed */
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#define ACB_S_DONE 3 /* cmd slot has been processed */
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int flags; /* cmd slot flags */
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#define ACB_F_TIMEOUT 0x01 /* command timeout */
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u_int8_t intstat; /* buffer to save sc_flags on disconnect */
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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 osiop_tinfo {
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int cmds; /* number of commands processed */
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int dconns; /* number of disconnects */
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int touts; /* number of timeouts */
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int perrs; /* number of parity errors */
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int lubusy; /* What local units/subr. are busy? */
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int period; /* Period suggestion */
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int offset; /* Offset suggestion */
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int flags; /* misc flags per each target */
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#define TI_NOSYNC 0x01 /* disable sync xfer on this target */
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#define TI_NODISC 0x02 /* disable disconnect on this target */
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int state; /* negotiation state */
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u_int8_t sxfer; /* value for SXFER reg */
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u_int8_t sbcl; /* value for SBCL reg */
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};
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struct osiop_softc {
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struct device sc_dev;
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bus_space_tag_t sc_bst; /* bus space tag */
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bus_space_handle_t sc_reg; /* register I/O handle */
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bus_dma_tag_t sc_dmat; /* bus dma tag */
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bus_dmamap_t sc_scrdma; /* script dma map */
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bus_dmamap_t sc_dsdma; /* script data dma map */
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u_int32_t *sc_script; /* ptr to script memory */
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struct osiop_ds *sc_ds; /* ptr to data structure memory */
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int sc_id; /* adapter SCSI id */
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int sc_active; /* number of active I/O's */
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struct osiop_acb *sc_nexus; /* current command */
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struct osiop_acb *sc_acb; /* the real command blocks */
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/* Lists of command blocks */
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TAILQ_HEAD(acb_list, osiop_acb) free_list,
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ready_list,
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nexus_list;
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struct scsipi_adapter sc_adapter;
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struct scsipi_channel sc_channel;
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struct osiop_tinfo sc_tinfo[OSIOP_NTGT];
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int sc_clock_freq;
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int sc_tcp[4];
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int sc_flags;
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#define OSIOP_INTSOFF 0x80 /* Interrupts turned off */
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#define OSIOP_INTDEFER 0x40 /* MD interrupt has been deferred */
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#define OSIOP_NODMA 0x02 /* No DMA transfer */
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#define OSIOP_ALIVE 0x01 /* controller initialized */
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int sc_cfflags; /* copy of config flags */
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int sc_minsync;
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u_int8_t sc_dstat;
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u_int8_t sc_sstat0;
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u_int8_t sc_sstat1;
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u_int8_t sc_istat;
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u_int8_t sc_dcntl;
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u_int8_t sc_ctest7;
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u_int8_t sc_sien;
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u_int8_t sc_dien;
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};
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/* negotiation states */
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#define NEG_INIT 0 /* Initial negotiate state */
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#define NEG_SYNC NEG_INIT /* Negotiate synch transfers */
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#define NEG_WAITS 1 /* Waiting for synch negoation response */
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#define NEG_DONE 2 /* Wide and/or sync negotation done */
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void osiop_attach(struct osiop_softc *);
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void osiop_intr(struct osiop_softc *);
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