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1.1 root 1: /* saio.h 6.2 9/23/83 */
2:
3: /*
4: * Header file for standalone package
5: */
6:
7: /*
8: * Io block: includes an
9: * inode, cells for the use of seek, etc,
10: * and a buffer.
11: */
12: struct iob {
13: int i_flgs; /* see F_ below */
14: struct inode i_ino; /* inode, if file */
15: int i_unit; /* pseudo device unit */
16: daddr_t i_boff; /* block offset on device */
17: daddr_t i_cyloff; /* cylinder offset on device */
18: off_t i_offset; /* seek offset in file */
19: daddr_t i_bn; /* 1st block # of next read */
20: char *i_ma; /* memory address of i/o buffer */
21: int i_cc; /* character count of transfer */
22: int i_error; /* error # return */
23: int i_errcnt; /* error count for driver retries */
24: int i_errblk; /* block # in error for error reporting */
25: char i_buf[MAXBSIZE];/* i/o buffer */
26: union {
27: struct fs ui_fs; /* file system super block info */
28: char dummy[SBSIZE];
29: } i_un;
30: };
31: #define i_fs i_un.ui_fs
32: #define NULL 0
33:
34: #define F_READ 0x1 /* file opened for reading */
35: #define F_WRITE 0x2 /* file opened for writing */
36: #define F_ALLOC 0x4 /* buffer allocated */
37: #define F_FILE 0x8 /* file instead of device */
38: #define F_NBSF 0x10 /* no bad sector forwarding */
39: #define F_ECCLM 0x20 /* limit # of bits in ecc correction */
40: #define F_SSI 0x40 /* set skip sector inhibit */
41: #define F_SEVRE 0x80 /* Severe burnin (no retries, no ECC) */
42: /* io types */
43: #define F_RDDATA 0x0100 /* read data */
44: #define F_WRDATA 0x0200 /* write data */
45: #define F_HDR 0x0400 /* include header on next i/o */
46: #define F_CHECK 0x0800 /* perform check of data read/write */
47: #define F_HCHECK 0x1000 /* perform check of header and data */
48:
49: #define F_TYPEMASK 0xff00
50:
51: /*
52: * Device switch.
53: */
54: struct devsw {
55: char *dv_name;
56: int (*dv_strategy)();
57: int (*dv_open)();
58: int (*dv_close)();
59: int (*dv_ioctl)();
60: };
61:
62: struct devsw devsw[];
63:
64: /*
65: * Drive description table.
66: * Returned from SAIODEVDATA call.
67: */
68: struct st {
69: short nsect; /* # sectors/track */
70: short ntrak; /* # tracks/surfaces/heads */
71: short nspc; /* # sectors/cylinder */
72: short ncyl; /* # cylinders */
73: short *off; /* partition offset table (cylinders) */
74: };
75:
76: /*
77: * Request codes. Must be the same a F_XXX above
78: */
79: #define READ 1
80: #define WRITE 2
81:
82: #define NBUFS 4
83:
84: char b[NBUFS][MAXBSIZE];
85: daddr_t blknos[NBUFS];
86:
87: #define NFILES 4
88: struct iob iob[NFILES];
89:
90: extern int errno; /* just like unix */
91:
92: /* error codes */
93: #define EBADF 1 /* bad file descriptor */
94: #define EOFFSET 2 /* relative seek not supported */
95: #define EDEV 3 /* improper device specification on open */
96: #define ENXIO 4 /* unknown device specified */
97: #define EUNIT 5 /* improper unit specification */
98: #define ESRCH 6 /* directory search for file failed */
99: #define EIO 7 /* generic error */
100: #define ECMD 10 /* undefined driver command */
101: #define EBSE 11 /* bad sector error */
102: #define EWCK 12 /* write check error */
103: #define EECC 13 /* uncorrectable ecc error */
104: #define EHER 14 /* hard error */
105:
106: /* ioctl's -- for disks just now */
107: #define SAIOHDR (('d'<<8)|1) /* next i/o includes header */
108: #define SAIOCHECK (('d'<<8)|2) /* next i/o checks data */
109: #define SAIOHCHECK (('d'<<8)|3) /* next i/o checks header & data */
110: #define SAIONOBAD (('d'<<8)|4) /* inhibit bad sector forwarding */
111: #define SAIODOBAD (('d'<<8)|5) /* enable bad sector forwarding */
112: #define SAIOECCLIM (('d'<<8)|6) /* limit ecc correction to 5 bits */
113: #define SAIOECCUNL (('d'<<8)|7) /* use standard ecc procedures */
114: #define SAIODEVDATA (('d'<<8)|8) /* get device data */
115: #define SAIOSSI (('d'<<8)|9) /* set skip sector inhibit */
116: #define SAIONOSSI (('d'<<8)|10) /* inhibit skip sector handling */
117: #define SAIOSSDEV (('d'<<8)|11) /* is device skip sector type? */
118: #define SAIODEBUG (('d'<<8)|12) /* enable/disable debugging */
119: #define SAIOSEVRE (('d'<<8)|13) /* severe burnin, no ECC, no retries */
120: #define SAIONSEVRE (('d'<<8)|14) /* clear severe burnin */
121:
122: /* codes for sector header word 1 */
123: #define HDR1_FMT22 0x1000 /* standard 16 bit format */
124: #define HDR1_OKSCT 0xc000 /* sector ok */
125: #define HDR1_SSF 0x2000 /* skip sector flag */
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