1*41082Swilliam /*- 2*41082Swilliam * Copyright (c) 1990 The Regents of the University of California. 3*41082Swilliam * All rights reserved. 4*41082Swilliam * 5*41082Swilliam * This code is derived from software contributed to Berkeley by 6*41082Swilliam * William Jolitz. 7*41082Swilliam * 8*41082Swilliam * %sccs.include.noredist.c% 9*41082Swilliam * 10*41082Swilliam * @(#)saio.h 7.1 (Berkeley) 04/24/90 11*41082Swilliam */ 12*41082Swilliam 13*41082Swilliam /* 14*41082Swilliam * Header file for standalone package 15*41082Swilliam */ 16*41082Swilliam 17*41082Swilliam /* 18*41082Swilliam * Io block: includes an 19*41082Swilliam * inode, cells for the use of seek, etc, 20*41082Swilliam * and a buffer. 21*41082Swilliam */ 22*41082Swilliam struct iob { 23*41082Swilliam int i_flgs; /* see F_ below */ 24*41082Swilliam struct inode i_ino; /* inode, if file */ 25*41082Swilliam int i_unit; /* pseudo device unit */ 26*41082Swilliam daddr_t i_boff; /* block offset on device */ 27*41082Swilliam off_t i_offset; /* seek offset in file */ 28*41082Swilliam daddr_t i_bn; /* 1st block # of next read */ 29*41082Swilliam char *i_ma; /* memory address of i/o buffer */ 30*41082Swilliam int i_cc; /* character count of transfer */ 31*41082Swilliam int i_error; /* error # return */ 32*41082Swilliam int i_errcnt; /* error count for driver retries */ 33*41082Swilliam int i_errblk; /* block # in error for error reporting */ 34*41082Swilliam struct fs i_fs; /* file system super block info */ 35*41082Swilliam char i_buf[MAXBSIZE];/* i/o buffer */ 36*41082Swilliam }; 37*41082Swilliam 38*41082Swilliam /* 39*41082Swilliam * Macros to handle conversion from unit and partition to dev_t's. 40*41082Swilliam */ 41*41082Swilliam #define minor_partition(s) (s & 7) 42*41082Swilliam #define minor_unit(s) ((s>>3) & 31) 43*41082Swilliam #define make_minor(u,p) ((u<<3) | p) 44*41082Swilliam 45*41082Swilliam #define NULL 0 46*41082Swilliam 47*41082Swilliam #define F_READ 0x1 /* file opened for reading */ 48*41082Swilliam #define F_WRITE 0x2 /* file opened for writing */ 49*41082Swilliam #define F_ALLOC 0x4 /* buffer allocated */ 50*41082Swilliam #define F_FILE 0x8 /* file instead of device */ 51*41082Swilliam #define F_NBSF 0x10 /* no bad sector forwarding */ 52*41082Swilliam #define F_ECCLM 0x20 /* limit # of bits in ecc correction */ 53*41082Swilliam #define F_SSI 0x40 /* set skip sector inhibit */ 54*41082Swilliam #define F_SEVRE 0x80 /* Severe burnin (no retries, no ECC) */ 55*41082Swilliam /* io types */ 56*41082Swilliam #define F_RDDATA 0x0100 /* read data */ 57*41082Swilliam #define F_WRDATA 0x0200 /* write data */ 58*41082Swilliam #define F_HDR 0x0400 /* include header on next i/o */ 59*41082Swilliam #define F_CHECK 0x0800 /* perform check of data read/write */ 60*41082Swilliam #define F_HCHECK 0x1000 /* perform check of header and data */ 61*41082Swilliam 62*41082Swilliam #define F_TYPEMASK 0xff00 63*41082Swilliam 64*41082Swilliam /* 65*41082Swilliam * Device switch. 66*41082Swilliam */ 67*41082Swilliam struct devsw { 68*41082Swilliam char *dv_name; 69*41082Swilliam int (*dv_strategy)(); 70*41082Swilliam int (*dv_open)(); 71*41082Swilliam int (*dv_close)(); 72*41082Swilliam int (*dv_ioctl)(); 73*41082Swilliam }; 74*41082Swilliam 75*41082Swilliam struct devsw devsw[]; 76*41082Swilliam 77*41082Swilliam /* 78*41082Swilliam * Drive description table. 79*41082Swilliam * Returned from SAIODEVDATA call. 80*41082Swilliam */ 81*41082Swilliam struct st { 82*41082Swilliam short nsect; /* # sectors/track */ 83*41082Swilliam short ntrak; /* # tracks/surfaces/heads */ 84*41082Swilliam short nspc; /* # sectors/cylinder */ 85*41082Swilliam short ncyl; /* # cylinders */ 86*41082Swilliam short *off; /* partition offset table (cylinders) */ 87*41082Swilliam }; 88*41082Swilliam 89*41082Swilliam /* 90*41082Swilliam * Request codes. Must be the same a F_XXX above 91*41082Swilliam */ 92*41082Swilliam #define READ 1 93*41082Swilliam #define WRITE 2 94*41082Swilliam 95*41082Swilliam #define NFILES 2 96*41082Swilliam struct iob iob[NFILES]; 97*41082Swilliam 98*41082Swilliam extern int errno; /* just like unix */ 99*41082Swilliam 100*41082Swilliam /* error codes */ 101*41082Swilliam #define EBADF 1 /* bad file descriptor */ 102*41082Swilliam #define EOFFSET 2 /* relative seek not supported */ 103*41082Swilliam #define EDEV 3 /* improper device specification on open */ 104*41082Swilliam #define ENXIO 4 /* unknown device specified */ 105*41082Swilliam #define EUNIT 5 /* improper unit specification */ 106*41082Swilliam #define ESRCH 6 /* directory search for file failed */ 107*41082Swilliam #define EIO 7 /* generic error */ 108*41082Swilliam #define ECMD 10 /* undefined driver command */ 109*41082Swilliam #define EBSE 11 /* bad sector error */ 110*41082Swilliam #define EWCK 12 /* write check error */ 111*41082Swilliam #define EECC 13 /* uncorrectable ecc error */ 112*41082Swilliam #define EHER 14 /* hard error */ 113*41082Swilliam 114*41082Swilliam /* ioctl's -- for disks just now */ 115*41082Swilliam #define SAIOHDR (('d'<<8)|1) /* next i/o includes header */ 116*41082Swilliam #define SAIOCHECK (('d'<<8)|2) /* next i/o checks data */ 117*41082Swilliam #define SAIOHCHECK (('d'<<8)|3) /* next i/o checks header & data */ 118*41082Swilliam #define SAIONOBAD (('d'<<8)|4) /* inhibit bad sector forwarding */ 119*41082Swilliam #define SAIODOBAD (('d'<<8)|5) /* enable bad sector forwarding */ 120*41082Swilliam #define SAIOECCLIM (('d'<<8)|6) /* limit ecc correction to 5 bits */ 121*41082Swilliam #define SAIOECCUNL (('d'<<8)|7) /* use standard ecc procedures */ 122*41082Swilliam #define SAIODEVDATA (('d'<<8)|8) /* get device data */ 123*41082Swilliam #define SAIOSSI (('d'<<8)|9) /* set skip sector inhibit */ 124*41082Swilliam #define SAIONOSSI (('d'<<8)|10) /* inhibit skip sector handling */ 125*41082Swilliam #define SAIOSSDEV (('d'<<8)|11) /* is device skip sector type? */ 126*41082Swilliam #define SAIODEBUG (('d'<<8)|12) /* enable/disable debugging */ 127*41082Swilliam #define SAIOSEVRE (('d'<<8)|13) /* severe burnin, no ECC, no retries */ 128*41082Swilliam #define SAIONSEVRE (('d'<<8)|14) /* clear severe burnin */ 129