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da7c5cc6 KM |
1 | /* |
2 | * Copyright (c) 1982 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | * | |
6 | * @(#)saio.h 6.3 (Berkeley) %G% | |
7 | */ | |
96dca2cc BJ |
8 | |
9 | /* | |
06397eef | 10 | * Header file for standalone package |
96dca2cc BJ |
11 | */ |
12 | ||
13 | /* | |
06397eef | 14 | * Io block: includes an |
96dca2cc BJ |
15 | * inode, cells for the use of seek, etc, |
16 | * and a buffer. | |
17 | */ | |
18 | struct iob { | |
06397eef SL |
19 | int i_flgs; /* see F_ below */ |
20 | struct inode i_ino; /* inode, if file */ | |
21 | int i_unit; /* pseudo device unit */ | |
22 | daddr_t i_boff; /* block offset on device */ | |
23 | daddr_t i_cyloff; /* cylinder offset on device */ | |
24 | off_t i_offset; /* seek offset in file */ | |
25 | daddr_t i_bn; /* 1st block # of next read */ | |
26 | char *i_ma; /* memory address of i/o buffer */ | |
27 | int i_cc; /* character count of transfer */ | |
28 | int i_error; /* error # return */ | |
29 | int i_errcnt; /* error count for driver retries */ | |
30 | int i_errblk; /* block # in error for error reporting */ | |
31 | char i_buf[MAXBSIZE];/* i/o buffer */ | |
cb31612d | 32 | union { |
06397eef | 33 | struct fs ui_fs; /* file system super block info */ |
cb31612d KM |
34 | char dummy[SBSIZE]; |
35 | } i_un; | |
96dca2cc | 36 | }; |
cb31612d | 37 | #define i_fs i_un.ui_fs |
e184e531 | 38 | #define NULL 0 |
96dca2cc | 39 | |
0839bdeb SL |
40 | #define F_READ 0x1 /* file opened for reading */ |
41 | #define F_WRITE 0x2 /* file opened for writing */ | |
42 | #define F_ALLOC 0x4 /* buffer allocated */ | |
43 | #define F_FILE 0x8 /* file instead of device */ | |
e184e531 | 44 | #define F_NBSF 0x10 /* no bad sector forwarding */ |
e63fbccd SL |
45 | #define F_ECCLM 0x20 /* limit # of bits in ecc correction */ |
46 | #define F_SSI 0x40 /* set skip sector inhibit */ | |
71da8ead | 47 | #define F_SEVRE 0x80 /* Severe burnin (no retries, no ECC) */ |
0839bdeb SL |
48 | /* io types */ |
49 | #define F_RDDATA 0x0100 /* read data */ | |
50 | #define F_WRDATA 0x0200 /* write data */ | |
51 | #define F_HDR 0x0400 /* include header on next i/o */ | |
52 | #define F_CHECK 0x0800 /* perform check of data read/write */ | |
53 | #define F_HCHECK 0x1000 /* perform check of header and data */ | |
54 | ||
55 | #define F_TYPEMASK 0xff00 | |
96dca2cc BJ |
56 | |
57 | /* | |
06397eef | 58 | * Device switch. |
96dca2cc BJ |
59 | */ |
60 | struct devsw { | |
61 | char *dv_name; | |
62 | int (*dv_strategy)(); | |
63 | int (*dv_open)(); | |
64 | int (*dv_close)(); | |
0839bdeb | 65 | int (*dv_ioctl)(); |
96dca2cc BJ |
66 | }; |
67 | ||
68 | struct devsw devsw[]; | |
69 | ||
e63fbccd SL |
70 | /* |
71 | * Drive description table. | |
72 | * Returned from SAIODEVDATA call. | |
73 | */ | |
be8e681f | 74 | struct st { |
e63fbccd | 75 | short nsect; /* # sectors/track */ |
06397eef | 76 | short ntrak; /* # tracks/surfaces/heads */ |
e63fbccd SL |
77 | short nspc; /* # sectors/cylinder */ |
78 | short ncyl; /* # cylinders */ | |
79 | short *off; /* partition offset table (cylinders) */ | |
e184e531 HS |
80 | }; |
81 | ||
96dca2cc | 82 | /* |
06397eef | 83 | * Request codes. Must be the same a F_XXX above |
96dca2cc BJ |
84 | */ |
85 | #define READ 1 | |
86 | #define WRITE 2 | |
87 | ||
88 | #define NBUFS 4 | |
89 | ||
cb31612d | 90 | char b[NBUFS][MAXBSIZE]; |
96dca2cc BJ |
91 | daddr_t blknos[NBUFS]; |
92 | ||
06397eef | 93 | #define NFILES 4 |
96dca2cc | 94 | struct iob iob[NFILES]; |
3d2087b6 | 95 | |
0839bdeb SL |
96 | extern int errno; /* just like unix */ |
97 | ||
98 | /* error codes */ | |
99 | #define EBADF 1 /* bad file descriptor */ | |
100 | #define EOFFSET 2 /* relative seek not supported */ | |
101 | #define EDEV 3 /* improper device specification on open */ | |
102 | #define ENXIO 4 /* unknown device specified */ | |
103 | #define EUNIT 5 /* improper unit specification */ | |
104 | #define ESRCH 6 /* directory search for file failed */ | |
105 | #define EIO 7 /* generic error */ | |
06397eef SL |
106 | #define ECMD 10 /* undefined driver command */ |
107 | #define EBSE 11 /* bad sector error */ | |
108 | #define EWCK 12 /* write check error */ | |
109 | #define EECC 13 /* uncorrectable ecc error */ | |
110 | #define EHER 14 /* hard error */ | |
0839bdeb SL |
111 | |
112 | /* ioctl's -- for disks just now */ | |
e184e531 | 113 | #define SAIOHDR (('d'<<8)|1) /* next i/o includes header */ |
0839bdeb SL |
114 | #define SAIOCHECK (('d'<<8)|2) /* next i/o checks data */ |
115 | #define SAIOHCHECK (('d'<<8)|3) /* next i/o checks header & data */ | |
e184e531 | 116 | #define SAIONOBAD (('d'<<8)|4) /* inhibit bad sector forwarding */ |
e63fbccd SL |
117 | #define SAIODOBAD (('d'<<8)|5) /* enable bad sector forwarding */ |
118 | #define SAIOECCLIM (('d'<<8)|6) /* limit ecc correction to 5 bits */ | |
e184e531 | 119 | #define SAIOECCUNL (('d'<<8)|7) /* use standard ecc procedures */ |
06397eef SL |
120 | #define SAIODEVDATA (('d'<<8)|8) /* get device data */ |
121 | #define SAIOSSI (('d'<<8)|9) /* set skip sector inhibit */ | |
122 | #define SAIONOSSI (('d'<<8)|10) /* inhibit skip sector handling */ | |
123 | #define SAIOSSDEV (('d'<<8)|11) /* is device skip sector type? */ | |
124 | #define SAIODEBUG (('d'<<8)|12) /* enable/disable debugging */ | |
71da8ead MK |
125 | #define SAIOSEVRE (('d'<<8)|13) /* severe burnin, no ECC, no retries */ |
126 | #define SAIONSEVRE (('d'<<8)|14) /* clear severe burnin */ | |
e184e531 HS |
127 | |
128 | /* codes for sector header word 1 */ | |
06397eef SL |
129 | #define HDR1_FMT22 0x1000 /* standard 16 bit format */ |
130 | #define HDR1_OKSCT 0xc000 /* sector ok */ | |
131 | #define HDR1_SSF 0x2000 /* skip sector flag */ |