Annotation of sys/arch/mvme68k/dev/sshvar.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: sshvar.h,v 1.5 2004/07/30 22:29:45 miod Exp $ */
2:
3: /*
4: * Copyright (c) 1995 Theo de Raadt
5: * Copyright (c) 1990 The Regents of the University of California.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Van Jacobson of Lawrence Berkeley Laboratory.
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: * 3. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
35: * @(#)sshvar.h 7.1 (Berkeley) 5/8/90
36: */
37: #ifndef _SSHVAR_H_
38: #define _SSHVAR_H_
39:
40: /*
41: * The largest single request will be MAXPHYS bytes which will require
42: * at most MAXPHYS/NBPG+1 chain elements to describe, i.e. if none of
43: * the buffer pages are physically contiguous (MAXPHYS/NBPG) and the
44: * buffer is not page aligned (+1).
45: */
46: #define DMAMAXIO (MAXPHYS/NBPG+1)
47:
48: /*
49: * Data Structure for SCRIPTS program
50: */
51: struct ssh_ds {
52: /*00*/ long scsi_addr; /* SCSI ID & sync */
53: /*04*/ long idlen; /* Identify message */
54: /*08*/ char *idbuf;
55: /*0c*/ long cmdlen; /* SCSI command */
56: /*10*/ char *cmdbuf;
57: /*14*/ long stslen; /* Status */
58: /*18*/ char *stsbuf;
59: /*1c*/ long msglen; /* Message */
60: /*20*/ char *msgbuf;
61: /*24*/ long msginlen; /* Message in */
62: /*28*/ char *msginbuf;
63: /*2c*/ long extmsglen; /* Extended message in */
64: /*30*/ char *extmsgbuf;
65: /*34*/ long synmsglen; /* Sync transfer request */
66: /*38*/ char *synmsgbuf;
67: struct {
68: /*3c*/ long datalen;
69: /*40*/ char *databuf;
70: } chain[DMAMAXIO];
71: };
72:
73: /*
74: * ACB. Holds additional information for each SCSI command Comments: We
75: * need a separate scsi command block because we may need to overwrite it
76: * with a request sense command. Basicly, we refrain from fiddling with
77: * the scsi_xfer struct (except do the expected updating of return values).
78: * We'll generally update: xs->{flags,resid,error,sense,status} and
79: * occasionally xs->retries.
80: */
81: struct ssh_acb {
82: /*00*/ TAILQ_ENTRY(ssh_acb) chain;
83: /*08*/ struct scsi_xfer *xs; /* SCSI xfer ctrl block from above */
84: /*0c*/ int flags; /* Status */
85: #define ACB_FREE 0x00
86: #define ACB_ACTIVE 0x01
87: #define ACB_DONE 0x04
88: #define ACB_CHKSENSE 0x08
89: /*10*/ struct scsi_generic cmd; /* SCSI command block */
90: /*1c*/ struct ssh_ds ds;
91: /*a0*/ void *iob_buf;
92: /*a4*/ u_long iob_curbuf;
93: /*a8*/ u_long iob_len, iob_curlen;
94: /*b0*/ u_char msgout[6];
95: /*b6*/ u_char msg[6];
96: /*bc*/ u_char stat[1];
97: /*bd*/ u_char status;
98: /*be*/ u_char dummy[2];
99: /*c0*/ int clen;
100: /*c4*/ char *daddr; /* Saved data pointer */
101: /*c8*/ int dleft; /* Residue */
102: };
103:
104: /*
105: * Some info about each (possible) target on the SCSI bus. This should
106: * probably have been a "per target+lunit" structure, but we'll leave it at
107: * this for now. Is there a way to reliably hook it up to sc->fordriver??
108: */
109: struct ssh_tinfo {
110: int cmds; /* #commands processed */
111: int dconns; /* #disconnects */
112: int touts; /* #timeouts */
113: int perrs; /* #parity errors */
114: int senses; /* #request sense commands sent */
115: ushort lubusy; /* What local units/subr. are busy? */
116: u_char flags;
117: u_char period; /* Period suggestion */
118: u_char offset; /* Offset suggestion */
119: } tinfo_t;
120:
121: struct ssh_softc {
122: struct device sc_dev;
123: struct intrhand sc_ih;
124:
125: u_char sc_istat;
126: u_char sc_dstat;
127: u_char sc_sstat0;
128: u_char sc_sstat1;
129: u_long sc_intcode;
130: struct scsi_link sc_link; /* proto for sub devices */
131: u_long sc_scriptspa; /* physical address of scripts */
132: ssh_regmap_p sc_sshp; /* the SSH */
133: u_long sc_active; /* number of active I/O's */
134:
135: /* Lists of command blocks */
136: TAILQ_HEAD(acb_list, ssh_acb) free_list,
137: ready_list,
138: nexus_list;
139:
140: struct ssh_acb *sc_nexus; /* current command */
141: #define SSH_NACB 8
142: struct ssh_acb *sc_acb; /* the real command blocks */
143: struct ssh_tinfo sc_tinfo[8];
144:
145: u_short sc_clock_freq;
146: u_char sc_dcntl;
147: u_char sc_ctest7;
148: u_short sc_tcp[4];
149: u_char sc_flags;
150: u_char sc_sien;
151: u_char sc_dien;
152: u_char sc_minsync;
153: /* one for each target */
154: struct syncpar {
155: u_char state;
156: u_char sxfer;
157: u_char sbcl;
158: } sc_sync[8];
159: };
160:
161: /* sc_flags */
162: #define SSH_INTSOFF 0x80 /* Interrupts turned off */
163: #define SSH_INTDEFER 0x40 /* Level 6 interrupt has been deferred */
164: #define SSH_ALIVE 0x01 /* controller initialized */
165: #define SSH_SELECTED 0x04 /* bus is in selected state. Needed for
166: correct abort procedure. */
167:
168: /* sync states */
169: #define SYNC_START 0 /* no sync handshake started */
170: #define SYNC_SENT 1 /* we sent sync request, no answer yet */
171: #define SYNC_DONE 2 /* target accepted our (or inferior) settings,
172: or it rejected the request and we stay async */
173:
174: #define MSG_CMD_COMPLETE 0x00
175: #define MSG_EXT_MESSAGE 0x01
176: #define MSG_SAVE_DATA_PTR 0x02
177: #define MSG_RESTORE_PTR 0x03
178: #define MSG_DISCONNECT 0x04
179: #define MSG_INIT_DETECT_ERROR 0x05
180: #define MSG_ABORT 0x06
181: #define MSG_REJECT 0x07
182: #define MSG_NOOP 0x08
183: #define MSG_PARITY_ERROR 0x09
184: #define MSG_BUS_DEVICE_RESET 0x0C
185: #define MSG_IDENTIFY 0x80
186: #define MSG_IDENTIFY_DR 0xc0 /* (disconnect/reconnect allowed) */
187: #define MSG_SYNC_REQ 0x01
188:
189: #define STS_CHECKCOND 0x02 /* Check Condition (ie., read sense) */
190: #define STS_CONDMET 0x04 /* Condition Met (ie., search worked) */
191: #define STS_BUSY 0x08
192: #define STS_INTERMED 0x10 /* Intermediate status sent */
193: #define STS_EXT 0x80 /* Extended status valid */
194:
195: void ssh_minphys(struct buf *bp);
196: int ssh_scsicmd(struct scsi_xfer *);
197:
198: #endif /* _SSHVAR_H */
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