/*
* 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>
#include <sys/malloc.h>
#define SBIC_ABORT_TIMEOUT 2000 /* time to wait for abort */
#define SBIC_SENSE_TIMEOUT 1000 /* time to wait for sense */
/*
* 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 scsi_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 wd33c93_acb {
TAILQ_ENTRY(wd33c93_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_READY 0x02 /* ACB is on ready list */
#define ACB_DONE 0x04
#define ACB_SENSE 0x08 /* ACB Requesting sense */
#define ACB_COMPLETE 0x10 /* Disconnected at end of xfer */
#define ACB_RESET 0x20 /* Require Reset */
#define ACB_ABORT 0x40 /* Require Abort */
int timeout;
struct scsipi_generic cmd; /* SCSI command block */
int clen;
char *daddr; /* kva for data */
size_t dleft; /* bytes remaining */
u_char tag_type; /* TAG Type (0x20-0x22, 0=No Tags) */
u_char tag_id; /* TAG id number */
};
/*
* 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 wd33c93_linfo {
LIST_ENTRY(wd33c93_linfo) link;
time_t last_used;
int lun;
int used; /* # slots in use */
u_char state;
#define L_STATE_IDLE 0
#define L_STATE_BUSY 1
#define L_STATE_ESTAT 2
struct wd33c93_acb *untagged;
struct wd33c93_acb *queued[SBIC_NTAGS];
};
struct wd33c93_tinfo {
int cmds; /* # of commands processed */
int dconns; /* # of disconnects */
u_char flags;
#define T_NEED_RESET 0x01 /* Should send a BUS_DEV_RESET */
#define T_NEGOTIATE 0x02 /* (Re)Negotiate synchronous options */
#define T_BUSY 0x04 /* Target is busy */
#define T_SYNCMODE 0x08 /* SYNC mode has been negotiated */
#define T_NOSYNC 0x10 /* Force ASYNC mode */
#define T_NODISC 0x20 /* Don't allow disconnect */
#define T_TAG 0x40 /* Turn on TAG QUEUEs */
#define T_WANTSYNC 0x80 /* Negotiations should aim for sync */
u_char period; /* Period suggestion */
u_char offset; /* Offset suggestion */
struct wd33c93_linfo *lun[SBIC_NLUN]; /* LUN list for this target */
};
/* Look up a lun in a tinfo */
#define TINFO_LUN(t, l) ((t)->lun[(l)])
struct wd33c93_softc {
device_t sc_dev;
struct scsipi_channel sc_channel; /* proto for sub devices */
struct scsipi_adapter sc_adapter;
device_t sc_child; /* attached scsibus, if any */
struct callout sc_watchdog;
void *sc_driver; /* driver specific field */
int target; /* Currently active target */
int lun; /* Currently active LUN */
/* Data about the current nexus (updated for every cmd switch) */
void * sc_daddr; /* Current data pointer */
size_t sc_dleft; /* Data left to transfer */
ssize_t sc_tcnt; /* number of bytes transferred */
/* Lists of command blocks */
TAILQ_HEAD(acb_list, wd33c93_acb) ready_list;
struct wd33c93_acb *sc_nexus; /* current command */
struct wd33c93_tinfo sc_tinfo[8];
u_short sc_state;
u_short sc_status;
int sc_disc; /* current # of active nexus's */
int sc_flags;
/* Static hardware attributes supplied by attachment */
int sc_id; /* SCSI ID for controller */
int sc_clkfreq; /* wd33c93 clk freq * 10 MHz */
uint8_t sc_dmamode; /* One of SBIC_CTL_*DMA */
/* Static hardware attributes derived by wd33c93_attach() */
int sc_chip; /* Chip variation */
int sc_rev; /* Chip revision */
int sc_cfflags; /* Copy of config flags */
int sc_maxxfer; /* Maximum transfer size */
uint8_t sc_maxoffset; /* Maximum sync offset (bytes) */
uint8_t sc_minsyncperiod; /* Minimum supported sync xfer period */
uint8_t sc_syncperiods[7]; /* Sync transfer periods (4ns units) */
uint8_t sc_fsyncperiods[3]; /* Sync transfer periods for Fast SCSI*/
