Commit | Line | Data |
---|---|---|
8ae0e4b4 | 1 | /* |
99152021 | 2 | * Copyright (c) 1982, 1986, 1988 Regents of the University of California. |
8ae0e4b4 KM |
3 | * All rights reserved. The Berkeley software License Agreement |
4 | * specifies the terms and conditions for redistribution. | |
5 | * | |
99152021 | 6 | * @(#)idc.c 7.4 (Berkeley) %G% |
8ae0e4b4 | 7 | */ |
57fa886d SL |
8 | |
9 | /* | |
10 | * IDC (RB730) | |
57fa886d SL |
11 | */ |
12 | ||
39c71180 MK |
13 | #include "param.h" |
14 | #include "inode.h" | |
15 | #include "fs.h" | |
a031a31b | 16 | |
99152021 | 17 | #include "../vax/pte.h" |
a031a31b SL |
18 | #include "../vaxuba/idcreg.h" |
19 | #include "../vaxuba/ubareg.h" | |
20 | ||
57fa886d SL |
21 | #include "saio.h" |
22 | #include "savax.h" | |
23 | ||
57fa886d SL |
24 | short rb02_off[] = { 0, 400, 0, -1, -1, -1, -1, -1 }; |
25 | short rb80_off[] = { 0, 37, 0, -1, -1, -1, 115, 305 }; | |
26 | ||
cfeb3635 KB |
27 | #define MAXCTLR 1 |
28 | #define MAXUNIT 4 | |
29 | #define MAXPART 8 | |
30 | ||
31 | int idc_type[MAXUNIT]; | |
57fa886d SL |
32 | |
33 | idcopen(io) | |
34 | register struct iob *io; | |
35 | { | |
36 | register struct idcdevice *idcaddr; | |
37 | register int i; | |
38 | ||
99152021 | 39 | if (io->i_adapt != 0) |
cfeb3635 KB |
40 | return (EADAPT); |
41 | if ((u_int)io->i_ctlr >= MAXCTLR) | |
42 | return (ECTLR); | |
43 | if ((u_int)io->i_unit >= MAXUNIT) | |
39c71180 | 44 | return (EUNIT); |
cfeb3635 KB |
45 | if ((u_int)io->i_part >= MAXPART) |
46 | return (EPART); | |
47 | idcaddr = (struct idcdevice *)((caddr_t)ubauba(io->i_adapt) + 0x200); | |
57fa886d SL |
48 | idcaddr->idcmpr = IDCGS_GETSTAT; |
49 | idcaddr->idccsr = IDC_GETSTAT|(io->i_unit<<8); | |
50 | idcwait(idcaddr); | |
51 | i = idcaddr->idcmpr; | |
52 | idcaddr->idccsr = IDC_CRDY|(1<<(io->i_unit+16)); | |
53 | idcwait(idcaddr); | |
54 | idcaddr->idccsr = (io->i_unit<<8)|IDC_RHDR; | |
55 | idcwait(idcaddr); | |
56 | if (idcaddr->idccsr & IDC_ERR) { | |
57 | printf("idc error: idccsr %x\n", idcaddr->idccsr); | |
39c71180 | 58 | return (EIO); |
57fa886d SL |
59 | } |
60 | i = idcaddr->idcmpr; | |
61 | i = idcaddr->idcmpr; | |
62 | if (idcaddr->idccsr & IDC_R80) { | |
63 | idc_type[io->i_unit] = 1; | |
cfeb3635 | 64 | io->i_boff = rb80_off[io->i_part] * NRB80SECT * NRB80TRK; |
57fa886d SL |
65 | } else { |
66 | idc_type[io->i_unit] = 0; | |
cfeb3635 | 67 | io->i_boff = rb02_off[io->i_part] * NRB02SECT/2 * NRB02TRK; |
39c71180 MK |
68 | } |
69 | return (0); | |
57fa886d SL |
70 | } |
71 | ||
72 | idcstrategy(io, func) | |
73 | register struct iob *io; | |
74 | { | |
75 | register struct idcdevice *idcaddr; | |
76 | int com; | |
77 | daddr_t bn; | |
78 | short dn, cn, sn, tn; | |
695069ba | 79 | short ccleft, thiscc = 0; |
57fa886d SL |
80 | int ubinfo, errcnt = 0; |
81 | ||
cfeb3635 | 82 | idcaddr = (struct idcdevice *)((caddr_t)ubauba(io->i_adapt) + 0x200); |
57fa886d SL |
83 | ubinfo = ubasetup(io, 1); |
84 | bn = io->i_bn; | |
695069ba BF |
85 | ccleft = io->i_cc; |
86 | retry: | |
57fa886d | 87 | dn = io->i_unit; |
57fa886d SL |
88 | if (idc_type[dn]) { |
89 | cn = bn/(NRB80SECT*NRB80TRK); | |
90 | sn = bn%NRB80SECT; | |
91 | tn = (bn / NRB80SECT) % NRB80TRK; | |
695069ba | 92 | thiscc = (NRB80SECT - sn) * 512; |
57fa886d | 93 | } else { |
695069ba BF |
94 | cn = 2*bn/(NRB02SECT*NRB02TRK); |
95 | sn = (2*bn)%NRB02SECT; | |
96 | tn = (2*bn / NRB02SECT) % NRB02TRK; | |
97 | thiscc = (NRB02SECT - sn) * 256; | |
57fa886d | 98 | } |
695069ba BF |
99 | thiscc = MIN(thiscc, ccleft); |
100 | ccleft -= thiscc; | |
57fa886d SL |
101 | idcaddr->idccsr = IDC_CRDY|IDC_SEEK|(dn<<8)|(1<<(dn+16)); |
102 | idcaddr->idcdar = (cn<<16)|(tn<<8)|sn; | |
103 | idcaddr->idccsr = IDC_SEEK|(dn<<8); | |
104 | idcwait(idcaddr); | |
105 | idcaddr->idccsr &= ~IDC_ATTN; | |
106 | com = dn<<8; | |
107 | if (func == READ) | |
108 | com |= IDC_READ; | |
109 | else | |
110 | com |= IDC_WRITE; | |
111 | idcaddr->idccsr = IDC_CRDY|com; | |
112 | idcaddr->idcbar = ubinfo&0x3ffff; | |
695069ba | 113 | idcaddr->idcbcr = -thiscc; |
57fa886d SL |
114 | idcaddr->idcdar = (cn<<16)|(tn<<8)|sn; |
115 | idcaddr->idccsr = com; | |
116 | idcwait(idcaddr); | |
57fa886d | 117 | if (idcaddr->idccsr & IDC_ERR) { |
b65f093e MK |
118 | printf("idc%d error: (cyl,trk,sec)=(%d,%d,%d) csr=%b\n", |
119 | dn, cn, tn, sn, idcaddr->idccsr, IDCCSR_BITS); | |
cfeb3635 | 120 | if (errcnt++ == 10) { |
57fa886d | 121 | printf("idc: unrecovered error\n"); |
695069ba | 122 | ubafree(io, ubinfo); |
57fa886d SL |
123 | return (-1); |
124 | } | |
57fa886d SL |
125 | goto retry; |
126 | } | |
127 | if (errcnt) | |
128 | printf("idc: recovered by retry\n"); | |
695069ba | 129 | if (ccleft) { |
2e4ee04a | 130 | bn += thiscc/NBPG; |
695069ba | 131 | ubinfo += thiscc; |
57fa886d SL |
132 | goto retry; |
133 | } | |
695069ba BF |
134 | ubafree(io, ubinfo); |
135 | return (io->i_cc); | |
57fa886d SL |
136 | } |
137 | ||
cfeb3635 | 138 | static |
57fa886d SL |
139 | idcwait(idcaddr) |
140 | register struct idcdevice *idcaddr; | |
141 | { | |
57fa886d | 142 | while ((idcaddr->idccsr & (IDC_CRDY|IDC_DRDY)) != (IDC_CRDY|IDC_DRDY)) |
cfeb3635 | 143 | DELAY(10); |
75f313ad | 144 | } |