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/* $OpenBSD: wd33c93var.h,v 1.1 2012/03/28 20:44:23 miod Exp $ */
/* $NetBSD: wd33c93var.h,v 1.10 2009/05/12 14:25:18 cegger Exp $ */
/*
* 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
*/
#define SBIC_NTARG 8
#define SBIC_NLUN 8
#define SBIC_NTAGS 256
#define SBIC_MAX_MSGLEN 8
#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 scsi_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 timeout to;
struct scsi_generic cmd; /* SCSI command block */
char *daddr; /* kva for data */
int clen;
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 {
int lun;
LIST_ENTRY(wd33c93_linfo) link;
time_t last_used;
u_char used; /* # slots in use */
u_char avail; /* where to start scanning */
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 /* Negotiatious 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 {
struct device sc_dev;
struct timeout sc_watchdog;
struct scsi_link sc_link;
void *sc_driver; /* driver specific field */
int target; /* Currently active target */
int lun; /* Currently active LUN */
/* WD33c93 registers */
bus_space_tag_t sc_regt;
bus_space_handle_t sc_asr_regh;
bus_space_handle_t sc_data_regh;
/* 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 transfered */
/* 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;
/* Message stuff */
u_short sc_msgify; /* Last IDENTIFY message */
u_short sc_msgout; /* Current message out */
u_short sc_msgpriq; /* mesg_out queue (bitmap) */
u_short sc_msgoutq; /* mesg_out queue */
u_char sc_imsg[SBIC_MAX_MSGLEN];
u_char sc_omsg[SBIC_MAX_MSGLEN];
u_char sc_imsglen;
u_char sc_omsglen;
/* 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*/
int (*sc_dmasetup)(struct wd33c93_softc *, void **, size_t *, int,
size_t *);
int (*sc_dmago)(struct wd33c93_softc *);
void (*sc_dmastop)(struct wd33c93_softc *);
void (*sc_reset)(struct wd33c93_softc *);
};
/* values for sc_flags */
#define SBICF_SELECTED 0x01 /* bus is in selected state. */
#define SBICF_NODMA 0x02 /* Polled transfer */
#define SBICF_INDMA 0x04 /* DMA I/O in progress */
#define SBICF_SYNCNEGO 0x08 /* Sync negotiation in progress */
#define SBICF_ABORTING 0x10 /* Aborting */
/* values for sc_state */
#define SBIC_UNINITIALIZED 0 /* Driver not initialized */
#define SBIC_IDLE 1 /* waiting for something to do */
#define SBIC_SELECTING 2 /* SCSI command is arbiting */
#define SBIC_RESELECTED 3 /* Has been reselected */
#define SBIC_IDENTIFIED 4 /* Has gotten IFY but not TAG */
#define SBIC_CONNECTED 5 /* Actively using the SCSI bus */
#define SBIC_DISCONNECT 6 /* MSG_DISCONNECT received */
#define SBIC_CMDCOMPLETE 7 /* MSG_CMDCOMPLETE received */
#define SBIC_ERROR 8 /* Error has occurred */
#define SBIC_SELTIMEOUT 9 /* Select Timeout */
#define SBIC_CLEANING 10 /* Scrubbing ACB's */
#define SBIC_BUSRESET 11 /* SCSI RST has been issued */
/* values for sc_msgout */
#define SEND_DEV_RESET 0x0001
#define SEND_PARITY_ERROR 0x0002
#define SEND_INIT_DET_ERR 0x0004
#define SEND_REJECT 0x0008
#define SEND_IDENTIFY 0x0010
#define SEND_ABORT 0x0020
#define SEND_WDTR 0x0040
#define SEND_SDTR 0x0080
#define SEND_TAG 0x0100
/* WD33c93 chipset revisions - values for sc_rev */
#define SBIC_CHIP_UNKNOWN 0
#define SBIC_CHIP_WD33C93 1
#define SBIC_CHIP_WD33C93A 2
#define SBIC_CHIP_WD33C93B 3
#define SBIC_CHIP_LIST {"UNKNOWN", "WD33C93", "WD33C93A", "WD33C93B"}
/* macros for sc_cfflags */
#define CFFLAGS_NODISC(_cf, _t) ((_cf) & (1 << ( 0 + (_t))))
#define CFFLAGS_NOSYNC(_cf, _t) ((_cf) & (1 << ( 8 + (_t))))
#define CFFLAGS_NOTAGS(_cf, _t) ((_cf) & (1 << (16 + (_t))))
/*
* States returned by our state machine
*/
#define SBIC_STATE_ERROR -1
#define SBIC_STATE_DONE 0
#define SBIC_STATE_RUNNING 1
#define SBIC_STATE_DISCONNECT 2
#define DEBUG_ACBS 0x01
#define DEBUG_INTS 0x02
#define DEBUG_CMDS 0x04
#define DEBUG_MISC 0x08
#define DEBUG_TRAC 0x10
#define DEBUG_RSEL 0x20
#define DEBUG_PHASE 0x40
#define DEBUG_DMA 0x80
#define DEBUG_CCMDS 0x100
#define DEBUG_MSGS 0x200
#define DEBUG_TAGS 0x400
#define DEBUG_SYNC 0x800
#ifdef SBICDEBUG
extern int wd33c93_debug_flags;
#define SBIC_DEBUG(level, str) \
do { \
if (wd33c93_debug & __CONCAT(DEBUG_,level)) \
printf str; \
} while (0)
#else
#define SBIC_DEBUG(level, str)
#endif
void wd33c93_scsi_cmd(struct scsi_xfer *);
void wd33c93_attach(struct wd33c93_softc *, struct scsi_adapter *);
int wd33c93_intr(void *);
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