1 /* $NetBSD: xdvar.h,v 1.8 2002/07/23 20:49:54 hannken Exp $ */ 2 3 /* 4 * 5 * Copyright (c) 1995 Charles D. Cranor 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Charles D. Cranor. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * x d v a r . h 36 * 37 * this file defines the software structure we use to control the 38 * 753/7053. 39 * 40 * author: Chuck Cranor <chuck@ccrc.wustl.edu> 41 */ 42 43 #include <sys/callout.h> 44 45 /* 46 * i/o request: wrapper for hardware's iopb data structure 47 */ 48 49 struct xd_iorq { 50 struct xd_iopb *iopb; /* address of matching iopb */ 51 struct xdc_softc *xdc; /* who we are working with */ 52 struct xd_softc *xd; /* which disk */ 53 int ttl; /* time to live */ 54 int mode; /* current mode (state+other data) */ 55 int tries; /* number of times we have tried it */ 56 int errno; /* error number if we fail */ 57 int lasterror; /* last error we got */ 58 int blockno; /* starting block no for this xfer */ 59 int sectcnt; /* number of sectors in xfer */ 60 char *dbuf; /* KVA of data buffer (advances) */ 61 char *dbufbase; /* base of dbuf */ 62 struct buf *buf; /* for NORM */ 63 }; 64 65 /* 66 * state 67 */ 68 69 #define XD_SUB_MASK 0xf0 /* mask bits for state */ 70 #define XD_SUB_FREE 0x00 /* free */ 71 #define XD_SUB_NORM 0x10 /* normal I/O request */ 72 #define XD_SUB_WAIT 0x20 /* normal I/O request in the 73 context of a process */ 74 #define XD_SUB_POLL 0x30 /* polled mode */ 75 #define XD_SUB_DONE 0x40 /* not active, but can't be free'd yet */ 76 #define XD_SUB_NOQ 0x50 /* don't queue, just submit (internal) */ 77 78 #define XD_STATE(X) ((X) & XD_SUB_MASK) /* extract state from mode */ 79 #define XD_NEWSTATE(OLD, NEW) (((OLD) & ~XD_SUB_MASK) |(NEW)) /* new state */ 80 81 82 /* 83 * other mode data 84 */ 85 86 #define XD_MODE_VERBO 0x08 /* print error messages */ 87 #define XD_MODE_B144 0x04 /* handling a bad144 sector */ 88 89 90 /* 91 * software timers and flags 92 */ 93 94 #define XDC_SUBWAITLIM 4 /* max number of "done" IOPBs there can be 95 where we still allow a SUB_WAIT command */ 96 #define XDC_TICKCNT (5*hz) /* call xdc_tick on this interval (5 sec) */ 97 #define XDC_MAXTTL 2 /* max number of xd ticks to live */ 98 #define XDC_NOUNIT (-1) /* for xdcmd: no unit number */ 99 100 /* 101 * a "xd_softc" structure contains per-disk state info. 102 */ 103 104 struct xd_softc { 105 struct device sc_dev; /* device struct, reqd by autoconf */ 106 struct disk sc_dk; /* generic disk info */ 107 struct xdc_softc *parent; /* parent */ 108 u_short flags; /* flags */ 109 u_short state; /* device state */ 110 int xd_drive; /* unit number */ 111 /* geometry */ 112 u_short ncyl, acyl, pcyl; /* number of cyl's */ 113 u_short sectpercyl; /* nhead*nsect */ 114 u_char nhead; /* number of heads */ 115 u_char nsect; /* number of sectors per track */ 116 u_char hw_spt; /* as above, but includes spare sectors */ 117 struct dkbad dkb; /* bad144 sectors */ 118 }; 119 120 /* 121 * flags 122 */ 123 124 #define XD_WLABEL 0x0001 /* write label */ 125 /* 126 * state 127 */ 128 129 #define XD_DRIVE_UNKNOWN 0 /* never talked to it */ 130 #define XD_DRIVE_ATTACHING 1 /* attach in progress */ 131 #define XD_DRIVE_NOLABEL 2 /* drive on-line, no label */ 132 #define XD_DRIVE_ONLINE 3 /* drive is on-line */ 133 134 /* 135 * a "xdc_softc" structure contains per-disk-controller state info, 136 * including a list of active controllers. 137 */ 138 139 struct xdc_softc { 140 struct device sc_dev; /* device struct, reqd by autoconf */ 141 struct evcnt sc_intrcnt; /* event counter (for vmstat -i) */ 142 143 struct callout sc_tick_ch; 144 145 struct xdc *xdc; /* vaddr of vme registers */ 146 147 int bustype; /* from attach args */ 148 int ipl; /* interrupt level */ 149 int vector; /* interrupt vector */ 150 151 struct xd_softc *sc_drives[XDC_MAXDEV]; /* drives on this controller */ 152 153 struct xd_iorq *reqs; /* i/o requests */ 154 struct xd_iopb *iopbase; /* iopb base addr (maps iopb->iorq) */ 155 struct xd_iopb *dvmaiopb; /* iopb base in DVMA space, not kvm */ 156 struct bufq_state sc_wq; /* queue'd IOPBs for this controller */ 157 char freereq[XDC_MAXIOPB]; /* free list (stack) */ 158 char waitq[XDC_MAXIOPB]; /* wait queue */ 159 u_char nfree; /* number of iopbs free */ 160 u_char nrun; /* number running */ 161 u_char nwait; /* number of waiting iopbs */ 162 u_char ndone; /* number of done IORQs */ 163 u_char waithead; /* head of queue */ 164 u_char waitend; /* end of queue */ 165 }; 166 167 /* 168 * reset blast modes 169 */ 170 171 #define XD_RSET_NONE (-1) /* restart all requests */ 172 #define XD_RSET_ALL (-2) /* don't restart anything */ 173