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
86 lines
3.4 KiB
C
86 lines
3.4 KiB
C
/* $NetBSD: uhavar.h,v 1.12 2001/04/25 17:53:35 bouyer Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
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* Simulation Facility, NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/queue.h>
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#define UHA_MSCP_MAX 32 /* store up to 32 MSCPs at one time */
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#define MSCP_HASH_SIZE 32 /* hash table size for phystokv */
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#define MSCP_HASH_SHIFT 9
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#define MSCP_HASH(x) ((((long)(x))>>MSCP_HASH_SHIFT) & (MSCP_HASH_SIZE - 1))
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struct uha_softc {
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struct device sc_dev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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bus_dma_tag_t sc_dmat;
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void *sc_ih;
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int sc_dmaflags; /* bus-specific DMA map creation flags */
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void (*start_mbox) __P((struct uha_softc *, struct uha_mscp *));
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int (*poll) __P((struct uha_softc *, struct scsipi_xfer *, int));
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void (*init) __P((struct uha_softc *));
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bus_dmamap_t sc_dmamap_mscp; /* maps the mscps */
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struct uha_mscp *sc_mscps; /* all our mscps */
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struct uha_mscp *sc_mscphash[MSCP_HASH_SIZE];
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TAILQ_HEAD(, uha_mscp) sc_free_mscp;
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int sc_nummscps;
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struct scsipi_adapter sc_adapter;
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struct scsipi_channel sc_channel;
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};
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/*
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* Offset of an MSCP from the beginning of the MSCP DMA mapping.
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*/
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#define UHA_MSCP_OFF(m) (((u_long)(m)) - ((u_long)&sc->sc_mscps[0]))
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struct uha_probe_data {
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int sc_irq, sc_drq;
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int sc_scsi_dev;
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};
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void uha_attach __P((struct uha_softc *, struct uha_probe_data *));
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void uha_timeout __P((void *arg));
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struct uha_mscp *uha_mscp_phys_kv __P((struct uha_softc *, u_long));
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void uha_done __P((struct uha_softc *, struct uha_mscp *));
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