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1.1 root 1: /*
2: * Copyright (c) 1988 University of Utah.
3: * Copyright (c) 1990 The Regents of the University of California.
4: * All rights reserved.
5: *
6: * This code is derived from software contributed to Berkeley by
7: * Van Jacobson of Lawrence Berkeley Laboratory and the Systems
8: * Programming Group of the University of Utah Computer Science Department.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the University of
21: * California, Berkeley and its contributors.
22: * 4. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: *
38: * from: Utah $Hdr: sd.c 1.2 90/01/23$
39: *
40: * @(#)sd.c 7.4 (Berkeley) 5/5/91
41: */
42:
43: /*
44: * SCSI CCS disk driver
45: */
46:
47: #include <sys/param.h>
48: #include "saio.h"
49: #include "samachdep.h"
50:
51: #include "../dev/scsireg.h"
52:
53: struct sd_softc {
54: char sc_retry;
55: char sc_alive;
56: short sc_blkshift;
57: } sd_softc[NSD];
58:
59: int sdpartoff[] = {
60: 1024, 17408, 0, 17408,
61: 115712, 218112, 82944, 0
62: };
63:
64: #define SDRETRY 2
65:
66: sdinit(unit)
67: register int unit;
68: {
69: register struct sd_softc *ss;
70: u_char stat;
71: int capbuf[2];
72:
73: if (unit > NSD)
74: return (0);
75: ss = &sd_softc[unit];
76: /* NB: HP6300 won't boot if next printf is removed (???) - vj */
77: printf("sd%d: ", unit);
78: if ((stat = scsi_test_unit_rdy(unit)) == 0) {
79: /* drive may be doing RTZ - wait a bit */
80: printf("not ready - retrying ... ");
81: if (stat == STS_CHECKCOND) {
82: DELAY(1000000);
83: if (scsi_test_unit_rdy(unit) == 0) {
84: printf("giving up.\n");
85: return (0);
86: }
87: }
88: }
89: printf("unit ready.\n");
90: /*
91: * try to get the drive block size.
92: */
93: capbuf[0] = 0;
94: capbuf[1] = 0;
95: if (scsi_read_capacity(unit, (u_char *)capbuf, sizeof(capbuf)) != 0) {
96: if (capbuf[1] > DEV_BSIZE)
97: for (; capbuf[1] > DEV_BSIZE; capbuf[1] >>= 1)
98: ++ss->sc_blkshift;
99: }
100: ss->sc_alive = 1;
101: return (1);
102: }
103:
104: sdreset(unit)
105: {
106: }
107:
108: sdopen(io)
109: struct iob *io;
110: {
111: register int unit = io->i_unit;
112: register struct sd_softc *ss = &sd_softc[unit];
113: struct sdinfo *ri;
114:
115: if (scsialive(unit) == 0)
116: _stop("scsi controller not configured");
117: if (ss->sc_alive == 0)
118: if (sdinit(unit) == 0)
119: _stop("sd init failed");
120: if (io->i_boff < 0 || io->i_boff > 7)
121: _stop("sd bad minor");
122: io->i_boff = sdpartoff[io->i_boff];
123: }
124:
125: sdstrategy(io, func)
126: register struct iob *io;
127: register int func;
128: {
129: register int unit = io->i_unit;
130: register struct sd_softc *ss = &sd_softc[unit];
131: char stat;
132: daddr_t blk = io->i_bn >> ss->sc_blkshift;
133: u_int nblk = io->i_cc >> ss->sc_blkshift;
134:
135: ss->sc_retry = 0;
136: retry:
137: if (func == F_READ)
138: stat = scsi_tt_read(unit, io->i_ma, io->i_cc, blk, nblk);
139: else
140: stat = scsi_tt_write(unit, io->i_ma, io->i_cc, blk, nblk);
141: if (stat) {
142: printf("sd(%d,?) err: 0x%x\n", unit, stat);
143: if (++ss->sc_retry > SDRETRY)
144: return(-1);
145: else
146: goto retry;
147: }
148: return(io->i_cc);
149: }
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