03a0c2d900
more robust in resource shortage situations, basically identical to code I added to the "ahc" driver some time ago. Thanks to Brad Spencer for the testing help.
91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
/* $NetBSD: ahavar.h,v 1.6 1997/11/04 05:58:24 thorpej Exp $ */
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/*
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* Copyright (c) 1994, 1996, 1997 Charles M. Hannum. All rights reserved.
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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 Charles M. Hannum.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/queue.h>
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/*
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* Mail box defs etc.
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* these could be bigger but we need the aha_softc to fit on a single page..
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*/
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#define AHA_MBX_SIZE 16 /* mail box size (MAX 255 MBxs) */
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/* don't need that many really */
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#define AHA_CCB_MAX 16 /* store up to 16 CCBs at one time */
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#define CCB_HASH_SIZE 16 /* hash table size for phystokv */
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#define CCB_HASH_SHIFT 9
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#define CCB_HASH(x) ((((long)(x))>>CCB_HASH_SHIFT) & (CCB_HASH_SIZE - 1))
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#define aha_nextmbx(wmb, mbx, mbio) \
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if ((wmb) == &(mbx)->mbio[AHA_MBX_SIZE - 1]) \
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(wmb) = &(mbx)->mbio[0]; \
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else \
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(wmb)++;
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struct aha_mbx {
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struct aha_mbx_out mbo[AHA_MBX_SIZE];
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struct aha_mbx_in mbi[AHA_MBX_SIZE];
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struct aha_mbx_out *cmbo; /* Collection Mail Box out */
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struct aha_mbx_out *tmbo; /* Target Mail Box out */
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struct aha_mbx_in *tmbi; /* Target Mail Box in */
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};
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struct aha_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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bus_dmamap_t sc_dmamap_mbox; /* maps the mailbox */
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void *sc_ih;
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struct aha_mbx *sc_mbx; /* all our mailboxes */
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#define wmbx (sc->sc_mbx)
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struct aha_ccb *sc_ccbhash[CCB_HASH_SIZE];
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TAILQ_HEAD(, aha_ccb) sc_free_ccb, sc_waiting_ccb;
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int sc_numccbs, sc_mbofull;
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struct scsipi_link sc_link; /* prototype for devs */
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LIST_HEAD(, scsipi_xfer) sc_queue;
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struct scsipi_xfer *sc_queuelast;
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char sc_model[18],
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sc_firmware[4];
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};
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struct aha_probe_data {
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int sc_irq, sc_drq;
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int sc_scsi_dev; /* adapters scsi id */
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};
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int aha_find __P((bus_space_tag_t, bus_space_handle_t,
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struct aha_probe_data *));
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void aha_attach __P((struct aha_softc *, struct aha_probe_data *));
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int aha_intr __P((void *));
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