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NetBSD/sys/dev/ic/mb89352var.h
bouyer 937a7a3ed9 Pull up the thorpej_scsipi branch to main branch. 
This is a completely rewritten scsipi_xfer execution engine, and the
associated changes to HBA drivers. Overview of changes & features:
- All xfers are queued in the mid-layer, rather than doing so in an
  ad-hoc fashion in individual adapter drivers.
- Adapter/channel resource management in the mid-layer, avoids even trying
  to start running an xfer if the adapter/channel doesn't have the resources.
- Better communication between the mid-layer and the adapters.
- Asynchronous event notification mechanism from adapter to mid-layer and
  peripherals.
- Better peripheral queue management: freeze/thaw, sorted requeueing during
  recovery, etc.
- Clean separation of peripherals, adapters, and adapter channels (no more
  scsipi_link).
- Kernel thread for each scsipi_channel makes error recovery much easier
  (no more dealing with interrupt context when recovering from an error).
- Mid-layer support for tagged queueing: commands can have the tag type
  set explicitly, tag IDs are allocated in the mid-layer (thus eliminating
  the need to use buggy tag ID allocation schemes in many adapter drivers).
- support for QUEUE FULL and CHECK CONDITION status in mid-layer; the command
  will be requeued, or a REQUEST SENSE will be sent as appropriate.

Just before the merge syssrc has been tagged with thorpej_scsipi_beforemerge
2001-04-25 17:53:04 +00:00

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/* $NetBSD: mb89352var.h,v 1.3 2001/04/25 17:53:33 bouyer Exp $ */
/* NecBSD: mb89352var.h,v 1.4 1998/03/14 07:31:22 kmatsuda Exp */
/*-
* Copyright (c) 1996,97,98,99 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum, Masaru Oki and Kouichi Matsuda.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles M. Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Copyright (c) 1994 Jarle Greipsland
* All rights reserved.
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* [NetBSD for NEC PC-98 series]
* Copyright (c) 1996, 1997, 1998
* NetBSD/pc98 porting staff. All rights reserved.
* Copyright (c) 1996, 1997, 1998
* Kouich Matsuda. All rights reserved.
*/
#ifndef _MB89352VAR_H_
#define _MB89352VAR_H_
/*
* 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. Basicly, 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 spc_acb {
struct scsi_generic scsipi_cmd;
int scsipi_cmd_length;
u_char *data_addr; /* Saved data pointer */
int data_length; /* Residue */
u_char target_stat; /* SCSI status byte */
#ifdef notdef
struct spc_dma_seg dma[SPC_NSEG]; /* Physical addresses+len */
#endif
TAILQ_ENTRY(spc_acb) chain;
struct scsipi_xfer *xs; /* SCSI xfer ctrl block from above */
int flags;
#define ACB_ALLOC 0x01
#define ACB_NEXUS 0x02
#define ACB_SENSE 0x04
#define ACB_ABORT 0x40
#define ACB_RESET 0x80
int timeout;
};
/*
* 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.
*/
struct spc_tinfo {
int cmds; /* #commands processed */
int dconns; /* #disconnects */
int touts; /* #timeouts */
int perrs; /* #parity errors */
int senses; /* #request sense commands sent */
ushort lubusy; /* What local units/subr. are busy? */
u_char flags;
#define DO_SYNC 0x01 /* (Re)Negotiate synchronous options */
#define DO_WIDE 0x02 /* (Re)Negotiate wide options */
u_char period; /* Period suggestion */
u_char offset; /* Offset suggestion */
u_char width; /* Width suggestion */
};
struct spc_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
struct scsipi_channel sc_channel; /* prototype for subdevs */
struct scsipi_adapter sc_adapter;
TAILQ_HEAD(, spc_acb) free_list, ready_list, nexus_list;
struct spc_acb *sc_nexus; /* current command */
struct spc_acb sc_acb[8];
struct spc_tinfo sc_tinfo[8];
/* Data about the current nexus (updated for every cmd switch) */
u_char *sc_dp; /* Current data pointer */
size_t sc_dleft; /* Data bytes left to transfer */
u_char *sc_cp; /* Current command pointer */
size_t sc_cleft; /* Command bytes left to transfer */
/* Adapter state */
u_char sc_phase; /* Current bus phase */
u_char sc_prevphase; /* Previous bus phase */
u_char sc_state; /* State applicable to the adapter */
#define SPC_INIT 0
#define SPC_IDLE 1
#define SPC_SELECTING 2 /* SCSI command is arbiting */
#define SPC_RESELECTED 3 /* Has been reselected */
#define SPC_CONNECTED 4 /* Actively using the SCSI bus */
#define SPC_DISCONNECT 5 /* MSG_DISCONNECT received */
#define SPC_CMDCOMPLETE 6 /* MSG_CMDCOMPLETE received */
#define SPC_CLEANING 7
u_char sc_flags;
#define SPC_DROP_MSGIN 0x01 /* Discard all msgs (parity err detected) */
#define SPC_ABORTING 0x02 /* Bailing out */
#define SPC_DOINGDMA 0x04 /* The FIFO data path is active! */
#define SPC_INACTIVE 0x80 /* The FIFO data path is active! */
u_char sc_selid; /* Reselection ID */
/* Message stuff */
u_char sc_msgpriq; /* Messages we want to send */
u_char sc_msgoutq; /* Messages sent during last MESSAGE OUT */
u_char sc_lastmsg; /* Message last transmitted */
u_char sc_currmsg; /* Message currently ready to transmit */
#define SEND_DEV_RESET 0x01
#define SEND_PARITY_ERROR 0x02
#define SEND_INIT_DET_ERR 0x04
#define SEND_REJECT 0x08
#define SEND_IDENTIFY 0x10
#define SEND_ABORT 0x20
#define SEND_SDTR 0x40
#define SEND_WDTR 0x80
#define SPC_MAX_MSG_LEN 8
u_char sc_omess[SPC_MAX_MSG_LEN];
u_char *sc_omp; /* Outgoing message pointer */
u_char sc_imess[SPC_MAX_MSG_LEN];
u_char *sc_imp; /* Incoming message pointer */
/* Hardware stuff */
int sc_initiator; /* Our scsi id */
int sc_freq; /* Clock frequency in MHz */
int sc_minsync; /* Minimum sync period / 4 */
int sc_maxsync; /* Maximum sync period / 4 */
};
#if SPC_DEBUG
#define SPC_SHOWACBS 0x01
#define SPC_SHOWINTS 0x02
#define SPC_SHOWCMDS 0x04
#define SPC_SHOWMISC 0x08
#define SPC_SHOWTRACE 0x10
#define SPC_SHOWSTART 0x20
#define SPC_DOBREAK 0x40
extern int spc_debug; /* SPC_SHOWSTART|SPC_SHOWMISC|SPC_SHOWTRACE; */
#define SPC_PRINT(b, s) do {if ((spc_debug & (b)) != 0) printf s;} while (0)
#define SPC_BREAK() do {if ((spc_debug & SPC_DOBREAK) != 0) Debugger();} while (0)
#define SPC_ASSERT(x) do {if (x) {} else {printf("%s at line %d: assertion failed\n", sc->sc_dev.dv_xname, __LINE__); Debugger();}} while (0)
#else
#define SPC_PRINT(b, s)
#define SPC_BREAK()
#define SPC_ASSERT(x)
#endif
#define SPC_ACBS(s) SPC_PRINT(SPC_SHOWACBS, s)
#define SPC_INTS(s) SPC_PRINT(SPC_SHOWINTS, s)
#define SPC_CMDS(s) SPC_PRINT(SPC_SHOWCMDS, s)
#define SPC_MISC(s) SPC_PRINT(SPC_SHOWMISC, s)
#define SPC_TRACE(s) SPC_PRINT(SPC_SHOWTRACE, s)
#define SPC_START(s) SPC_PRINT(SPC_SHOWSTART, s)
void spcattach __P((struct spc_softc *));
int spcintr __P((void *));
int spc_find __P((bus_space_tag_t, bus_space_handle_t, int));
void spc_init __P((struct spc_softc *));
void spc_sched __P((struct spc_softc *));
#endif /* _MB89352VAR_H_ */
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