937a7a3ed9
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
74 lines
3.0 KiB
C
74 lines
3.0 KiB
C
/* $NetBSD: iopspvar.h,v 1.4 2001/04/25 17:53:28 bouyer Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2000, 2001 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Andrew Doran.
|
|
*
|
|
* 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 the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
|
|
*/
|
|
|
|
#ifndef _I2O_IOPSPVAR_H_
|
|
#define _I2O_IOPSPVAR_H_
|
|
|
|
#define IOPSP_MAX_LUN 8
|
|
#define IOPSP_MAX_SCSI_TARGET 15
|
|
#define IOPSP_MAX_FCAL_TARGET 127
|
|
|
|
#define IOPSP_TIDMAP(map, t, l) (map[(t) * IOPSP_MAX_LUN + (l)])
|
|
#define IOPSP_TID_ABSENT 0x0000 /* Device is absent */
|
|
#define IOPSP_TID_INUSE 0xffff /* Device in use by another module */
|
|
|
|
#ifdef I2OVERBOSE
|
|
struct iopsp_target {
|
|
u_int8_t it_width;
|
|
u_int8_t it_syncrate;
|
|
u_int8_t it_offset;
|
|
u_int8_t it_flags;
|
|
};
|
|
#define IT_PRESENT 0x01 /* Target is present */
|
|
#endif
|
|
|
|
struct iopsp_softc {
|
|
struct device sc_dv; /* Generic device data */
|
|
struct scsipi_adapter sc_adapter; /* scsipi adapter */
|
|
struct scsipi_channel sc_channel; /* Prototype link */
|
|
struct iop_initiator sc_ii; /* I2O initiator state */
|
|
u_short *sc_tidmap; /* Target/LUN -> TID map */
|
|
u_int sc_chgind; /* Last LCT change # */
|
|
u_int sc_curqd; /* Current queue depth */
|
|
#ifdef I2OVERBOSE
|
|
struct iopsp_target *sc_targetmap; /* Target information */
|
|
#endif
|
|
};
|
|
|
|
#endif /* !_I2O_IOPSPVAR_H_ */
|