1 /*- 2 * Copyright (c) 1982, 1988, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)saio.h 8.1 (Berkeley) 06/11/93 8 */ 9 10 #include <sys/time.h> 11 12 #include <ufs/ffs/fs.h> 13 #include <ufs/ufs/dinode.h> 14 15 #include <stand.att/saioctl.h> 16 #include <stand.att/saerrno.h> 17 18 #define UNIX "/vmunix" 19 20 #ifndef NULL 21 #define NULL 0 22 #endif 23 24 /* I/O block */ 25 struct iob { 26 int i_flgs; /* flags (see F_*) */ 27 int i_adapt; /* adapter or bus */ 28 int i_ctlr; /* controller */ 29 int i_unit; /* pseudo device unit */ 30 int i_part; /* disk partition */ 31 daddr_t i_boff; /* block offset on device */ 32 daddr_t i_cyloff; /* cylinder offset on device */ 33 off_t i_offset; /* seek offset in file */ 34 dev_t i_dev; /* associated device */ 35 daddr_t i_bn; /* 1st block # of next read */ 36 char *i_ma; /* memory address of I/O buffer */ 37 int i_cc; /* character count of transfer */ 38 int i_error; /* error # return */ 39 int i_errcnt; /* error count for driver retries */ 40 int i_errblk; /* block # in error for error reporting */ 41 char i_buf[MAXBSIZE];/* I/O buffer */ 42 struct dinode i_ino; /* dinode, if file */ 43 union { /* file system super block info */ 44 struct fs ui_fs; 45 char dummy[SBSIZE]; 46 } i_un; 47 #define i_fs i_un.ui_fs 48 #define i_bus i_adapt 49 }; 50 51 #define SOPEN_MAX 4 52 extern struct iob iob[SOPEN_MAX]; 53 54 /* Codes for sector header word 1 */ 55 #define HDR1_FMT22 0x1000 /* standard 16 bit format */ 56 #define HDR1_OKSCT 0xc000 /* sector ok */ 57 #define HDR1_SSF 0x2000 /* skip sector flag */ 58 59 /* I/O flag values */ 60 #define F_READ 0x0001 /* file opened for reading */ 61 #define F_WRITE 0x0002 /* file opened for writing */ 62 #define F_ALLOC 0x0004 /* buffer allocated */ 63 #define F_FILE 0x0008 /* file instead of device */ 64 #define F_NBSF 0x0010 /* no bad sector forwarding */ 65 #define F_ECCLM 0x0020 /* limit # of bits in ecc correction */ 66 #define F_SSI 0x0040 /* set skip sector inhibit */ 67 #define F_SEVRE 0x0080 /* Severe burnin (no retries, no ECC) */ 68 69 /* I/O types */ 70 #define F_RDDATA 0x0100 /* read data */ 71 #define F_WRDATA 0x0200 /* write data */ 72 #define F_HDR 0x0400 /* include header on next i/o */ 73 #define F_CHECK 0x0800 /* perform check of data read/write */ 74 #define F_HCHECK 0x1000 /* perform check of header and data */ 75 76 #define F_TYPEMASK 0xff00 /* I/O type mask */ 77 78 /* Lseek values */ 79 #define L_SET 0 /* absolute offset */ 80 81 /* Device switch */ 82 struct devsw { 83 char *dv_name; 84 int (*dv_strategy)(); 85 int (*dv_open)(); 86 int (*dv_close)(); 87 int (*dv_ioctl)(); 88 }; 89 90 extern struct devsw devsw[]; /* device array */ 91 extern int ndevs; /* number of elements in devsw[] */ 92 93 #ifdef COMPAT_42 94 /* 95 * Old drive description table. 96 * still used by some drivers for now. 97 */ 98 struct st { 99 short nsect; /* # sectors/track */ 100 short ntrak; /* # tracks/surfaces/heads */ 101 short nspc; /* # sectors/cylinder */ 102 short ncyl; /* # cylinders */ 103 short *off; /* partition offset table (cylinders) */ 104 }; 105 #endif 106