/*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Van Jacobson of Lawrence Berkeley Laboratory.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)scsivar.h 7.1 (Berkeley) 5/8/90
*/
#ifndef _SBICVAR_H_
#define _SBICVAR_H_
#include <sys/callout.h>
/*
* The largest single request will be MAXPHYS bytes which will require
* at most MAXPHYS/PAGE_SIZE+1 chain elements to describe, i.e. if none of
* the buffer pages are physically contiguous (MAXPHYS/PAGE_SIZE) and the
* buffer is not page aligned (+1).
*/
#define DMAMAXIO (MAXPHYS/PAGE_SIZE+1)
struct dma_chain {
int dc_count;
char *dc_addr;
};
/*
* ACB. Holds additional information for each SCSI command Comments: We
* need a separate scsi command block because we may need to overwrite it
* with a request sense command. Basically, we refrain from fiddling with
* the scsipi_xfer struct (except do the expected updating of return values).
* We'll generally update: xs->{flags,resid,error,sense,status} and
* occasionally xs->retries.
*/
struct sbic_acb {
TAILQ_ENTRY(sbic_acb) chain;
struct scsipi_xfer *xs; /* SCSI xfer ctrl block from above */
int flags; /* Status */
#define ACB_FREE 0x00
#define ACB_ACTIVE 0x01
#define ACB_DONE 0x04
#define ACB_BBUF 0x10 /* DMA input needs to be copied from bounce */
#define ACB_DATAIN 0x20 /* DMA direction flag */
struct scsipi_generic cmd; /* SCSI command block */
int clen;
struct dma_chain sc_kv; /* Virtual address of whole DMA */
struct dma_chain sc_pa; /* Physical address of DMA segment */
u_long sc_tcnt; /* number of bytes for this DMA */
u_char *sc_dmausrbuf; /* user buffer kva - for bounce copy */
u_long sc_dmausrlen; /* length of bounce copy */
u_short sc_dmacmd; /* Internal data for this DMA */
char *pa_addr; /* XXXX initial phys addr */
u_char *sc_usrbufpa; /* user buffer phys addr */
};
/*
* Some info about each (possible) target on the SCSI bus. This should
* probably have been a "per target+lunit" structure, but we'll leave it at
* this for now. Is there a way to reliably hook it up to sc->fordriver??
*/
struct sbic_tinfo {
int cmds; /* #commands processed */
int dconns; /* #disconnects */
int touts; /* #timeouts */
int perrs; /* #parity errors */
u_char* bounce; /* Bounce buffer for this device */
ushort lubusy; /* What local units/subr. are busy? */
u_char flags;
u_char period; /* Period suggestion */
u_char offset; /* Offset suggestion */
};
struct sbic_acb *sc_nexus; /* current command */
struct sbic_acb sc_acb[8]; /* the real command blocks */
struct sbic_tinfo sc_tinfo[8];
struct scsipi_xfer *sc_xs; /* transfer from high level code */
u_char sc_flags;
u_char sc_scsiaddr;
u_char sc_stat[2];
u_char sc_msg[7];
u_long sc_clkfreq;
u_long sc_tcnt; /* number of bytes transferred */
u_short sc_dmacmd; /* used by DMA drivers */
u_short sc_dmatimo; /* DMA timeout */
u_long sc_dmamask; /* DMA valid mem mask */
struct dma_chain *sc_cur;
struct dma_chain *sc_last;
int (*sc_dmago)(struct sbic_softc *, char *, int, int);
int (*sc_dmanext)(struct sbic_softc *);
void (*sc_enintr)(struct sbic_softc *);
void (*sc_dmastop)(struct sbic_softc *);
u_short gtsc_bankmask; /* GVP specific bank selected */
};
/* sc_flags */
#define SBICF_ALIVE 0x01 /* controller initialized */
#define SBICF_DCFLUSH 0x02 /* need flush for overlap after DMA finishes */
#define SBICF_SELECTED 0x04 /* bus is in selected state. */
#define SBICF_ICMD 0x08 /* Immediate command in execution */
#define SBICF_BADDMA 0x10 /* controller can only DMA to ztwobus space */
#define SBICF_INTR 0x40 /* SBICF interrupt expected */
#define SBICF_INDMA 0x80 /* not used yet, DMA I/O in progress */
/* sync states */
#define SYNC_START 0 /* no sync handshake started */
#define SYNC_SENT 1 /* we sent sync request, no answer yet */
#define SYNC_DONE 2 /* target accepted our (or inferior) settings,
or it rejected the request and we stay async */
#ifdef DEBUG
#define DDB_FOLLOW 0x04
#define DDB_IO 0x08
#endif
extern u_char sbic_inhibit_sync[8];
extern int sbic_no_dma;
extern int sbic_clock_override;
