sys/dev/ic/ahavar.h

   1 /*      $NetBSD: ahavar.h,v 1.14 2008/04/28 20:23:49 martin Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
   9  * Simulation Facility, NASA Ames Research Center.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #ifndef _DEV_IC_AHAVAR_H_
  34 #define _DEV_IC_AHAVAR_H_
  35
  36 #include <sys/queue.h>
  37
  38 /*
  39  * Mail box defs  etc.
  40  * these could be bigger but we need the aha_softc to fit on a single page..
  41  */
  42 #define AHA_MBX_SIZE    16      /* mail box size  (MAX 255 MBxs) */
  43                                 /* don't need that many really */
  44 #define AHA_CCB_MAX     16      /* store up to 16 CCBs at one time */
  45 #define CCB_HASH_SIZE   16      /* hash table size for phystokv */
  46 #define CCB_HASH_SHIFT  9
  47 #define CCB_HASH(x)     ((((long)(x))>>CCB_HASH_SHIFT) & (CCB_HASH_SIZE - 1))
  48
  49 #define aha_nextmbx(wmb, mbx, mbio) \
  50         if ((wmb) == &(mbx)->mbio[AHA_MBX_SIZE - 1])    \
  51                 (wmb) = &(mbx)->mbio[0];                \
  52         else                                            \
  53                 (wmb)++;
  54
  55 struct aha_mbx {
  56         struct aha_mbx_out mbo[AHA_MBX_SIZE];
  57         struct aha_mbx_in mbi[AHA_MBX_SIZE];
  58         struct aha_mbx_out *cmbo;       /* Collection Mail Box out */
  59         struct aha_mbx_out *tmbo;       /* Target Mail Box out */
  60         struct aha_mbx_in *tmbi;        /* Target Mail Box in */
  61 };
  62
  63 struct aha_control {
  64         struct aha_mbx ac_mbx;          /* all our mailboxes */
  65         struct aha_ccb ac_ccbs[AHA_CCB_MAX]; /* all our control blocks */
  66 };
  67
  68 struct aha_softc {
  69         device_t sc_dev;
  70
  71         bus_space_tag_t sc_iot;
  72         bus_space_handle_t sc_ioh;
  73         bus_dma_tag_t sc_dmat;
  74         bus_dmamap_t sc_dmamap_control; /* maps the control structures */
  75         void *sc_ih;
  76
  77         struct aha_control *sc_control; /* control structures */
  78
  79 #define wmbx    (&sc->sc_control->ac_mbx)
  80
  81         struct aha_ccb *sc_ccbhash[CCB_HASH_SIZE];
  82         TAILQ_HEAD(, aha_ccb) sc_free_ccb, sc_waiting_ccb;
  83         int sc_mbofull;
  84
  85         struct scsipi_adapter sc_adapter;
  86         struct scsipi_channel sc_channel;
  87
  88         char sc_model[18],
  89              sc_firmware[4];
  90 };
  91
  92 /*
  93  * Offset of a Mail Box In from the beginning of the control DMA mapping.
  94  */
  95 #define AHA_MBI_OFF(m)  (offsetof(struct aha_control, ac_mbx.mbi[0]) +  \
  96                             (((u_long)(m)) - ((u_long)&wmbx->mbi[0])))
  97
  98 /*
  99  * Offset of a Mail Box Out from the beginning of the control DMA mapping.
 100  */
 101 #define AHA_MBO_OFF(m)  (offsetof(struct aha_control, ac_mbx.mbo[0]) +  \
 102                             (((u_long)(m)) - ((u_long)&wmbx->mbo[0])))
 103
 104 /*
 105  * Offset of a CCB from the beginning of the control DMA mapping.
 106  */
 107 #define AHA_CCB_OFF(c)  (offsetof(struct aha_control, ac_ccbs[0]) +     \
 108                     (((u_long)(c)) - ((u_long)&sc->sc_control->ac_ccbs[0])))
 109
 110 struct aha_probe_data {
 111         int sc_irq, sc_drq;
 112         int sc_scsi_dev;                /* adapters scsi id */
 113 };
 114
 115 int     aha_find(bus_space_tag_t, bus_space_handle_t,
 116             struct aha_probe_data *);
 117 void    aha_attach(struct aha_softc *, struct aha_probe_data *);
 118 int     aha_intr(void *);
 119
 120 #endif /* _DEV_IC_AHAVAR_H_ */