scsi-beos.c
上传用户:xiejiait
上传日期:2007-01-06
资源大小:881k
文件大小:8k
- /* @(#)scsi-beos.c 1.9 99/10/15 Copyright 1998 J. Schilling */
- #ifndef lint
- static char __sccsid[] =
- "@(#)scsi-beos.c 1.9 99/10/15 Copyright 1998 J. Schilling";
- #endif
- /*
- * Interface for the BeOS user-land raw SCSI implementation.
- *
- * This is a hack, that tries to emulate the functionality
- * of the scg driver.
- *
- * First version done by swetland@be.com
- *
- * Warning: you may change this source, but if you do that
- * you need to change the _scg_version and _scg_auth* string below.
- * You may not return "schily" for an SCG_AUTHOR request anymore.
- * Choose your name instead of "schily" and make clear that the version
- * string is related to a modified source.
- *
- * Copyright (c) 1998 J. Schilling
- */
- /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- /* nasty hack to avoid broken def of bool in SupportDefs.h */
- #define _SUPPORT_DEFS_H
- #ifndef _SYS_TYPES_H
- typedef unsigned long ulong;
- typedef unsigned int uint;
- typedef unsigned short ushort;
- #endif /* _SYS_TYPES_H */
- #include <BeBuild.h>
- #include <sys/types.h>
- #include <Errors.h>
- /*
- * Warning: you may change this source, but if you do that
- * you need to change the _scg_version and _scg_auth* string below.
- * You may not return "schily" for an SCG_AUTHOR request anymore.
- * Choose your name instead of "schily" and make clear that the version
- * string is related to a modified source.
- */
- LOCAL char _scg_trans_version[] = "scsi-beos.c-1.9"; /* The version for this transport*/
- /*-------------------------------------------------------------*/
- /*----- Shorthand type formats --------------------------------*/
- typedef signed char int8;
- typedef unsigned char uint8;
- typedef volatile signed char vint8;
- typedef volatile unsigned char vuint8;
- typedef short int16;
- typedef unsigned short uint16;
- typedef volatile short vint16;
- typedef volatile unsigned short vuint16;
- typedef long int32;
- typedef unsigned long uint32;
- typedef volatile long vint32;
- typedef volatile unsigned long vuint32;
- typedef long long int64;
- typedef unsigned long long uint64;
- typedef volatile long long vint64;
- typedef volatile unsigned long long vuint64;
- typedef volatile long vlong;
- typedef volatile int vint;
- typedef volatile short vshort;
- typedef volatile char vchar;
- typedef volatile unsigned long vulong;
- typedef volatile unsigned int vuint;
- typedef volatile unsigned short vushort;
- typedef volatile unsigned char vuchar;
- typedef unsigned char uchar;
- typedef unsigned short unichar;
- /*-------------------------------------------------------------*/
- /*----- Descriptive formats -----------------------------------*/
- typedef int32 status_t;
- typedef int64 bigtime_t;
- typedef uint32 type_code;
- typedef uint32 perform_code;
- /* end nasty hack */
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <unistd.h>
- #include <sys/stat.h>
- #include <scg/scgio.h>
- /* this is really really dumb (tm) */
- /*#undef sense*/
- /*#undef scb*/
- #include <device/scsi.h>
- #undef bool
- #include <drivers/CAM.h>
- struct _fdmap_ {
- struct _fdmap_ *next;
- int bus;
- int targ;
- int lun;
- int fd;
- };
- /*
- * Return version information for the low level SCSI transport code.
- * This has been introduced to make it easier to trace down problems
- * in applications.
- */
- EXPORT char *
- scg__version(scgp, what)
- SCSI *scgp;
- int what;
- {
- if (scgp != (SCSI *)0) {
- switch (what) {
- case SCG_VERSION:
- return (_scg_trans_version);
- /*
- * If you changed this source, you are not allowed to
- * return "schily" for the SCG_AUTHOR request.
- */
- case SCG_AUTHOR:
- return (_scg_auth_schily);
- case SCG_SCCS_ID:
- return (__sccsid);
- }
- }
- return ((char *)0);
- }
- EXPORT int
- scsi_open(scgp, device, busno, tgt, tlun)
- SCSI *scgp;
- char *device;
- int busno;
- int tgt;
- int tlun;
- {
- #ifdef nonono
- if (busno >= MAX_SCG || tgt >= MAX_TGT || tlun >= MAX_LUN) {
- errno = EINVAL;
- if (scgp->errstr)
- js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
- "Illegal value for busno, target or lun '%d,%d,%d'",
- busno, tgt, tlun);
- return (-1);
- }
- #endif
- if ((device != NULL && *device != ' ') || (busno == -2 && tgt == -2)) {
- errno = EINVAL;
- if (scgp->errstr)
- js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
- "Open by 'devname' not supported on this OS");
- return (-1);
- }
- return (1);
- }
- EXPORT int
- scsi_close(scgp)
- SCSI *scgp;
- {
- struct _fdmap_ *f;
- struct _fdmap_ *fnext;
- for (f = (struct _fdmap_ *)scgp->local; f; f=fnext) {
- scgp->local = 0;
- fnext = f->next;
- close(f->fd);
- free(f);
- }
- return (0);
- }
- LOCAL long
- scsi_maxdma(scgp)
- SCSI *scgp;
- {
- return (256*1024);
- }
- EXPORT void *
- scsi_getbuf(scgp, amt)
- SCSI *scgp;
- long amt;
- {
- if (amt <= 0 || amt > scsi_maxdma(scgp))
- return ((void *)0);
- if (scgp->debug)
- printf("scsi_getbuf: %ld bytesn", amt);
- scgp->bufbase = malloc((size_t)(amt));
- return (scgp->bufbase);
- }
- EXPORT void
- scsi_freebuf(scgp)
- SCSI *scgp;
- {
- if (scgp->bufbase)
- free(scgp->bufbase);
- scgp->bufbase = NULL;
- }
- EXPORT BOOL
- scsi_havebus(scgp, busno)
- SCSI *scgp;
- int busno;
- {
- struct stat sb;
- char buf[128];
- if (busno < 8)
- sprintf(buf, "/dev/bus/scsi/%d", busno);
- else
- sprintf(buf, "/dev/disk/ide/atapi/%d", busno-8);
- if (stat(buf, &sb))
- return (FALSE);
- return (TRUE);
- }
- EXPORT int
- scsi_fileno(scgp, busno, tgt, tlun)
- SCSI *scgp;
- int busno;
- int tgt;
- int tlun;
- {
- struct _fdmap_ *f;
- char buf[128];
- int fd;
- for (f = (struct _fdmap_ *)scgp->local; f; f=f->next) {
- if (f->bus == busno && f->targ == tgt && f->lun == tlun)
- return (f->fd);
- }
- if (busno < 8) {
- sprintf(buf, "/dev/bus/scsi/%d/%d/%d/raw",
- busno, tgt, tlun);
- } else {
- char *tgtstr = (tgt == 0) ? "master" : (tgt == 1) ? "slave" : "dummy";
- sprintf(buf, "/dev/disk/ide/atapi/%d/%s/%d/raw",
- busno-8, tgtstr, tlun);
- }
- fd = open(buf, 0);
- if (fd >=0 ) {
- f = (struct _fdmap_ *) malloc(sizeof(struct _fdmap_));
- f->bus = busno;
- f->targ = tgt;
- f->lun = tlun;
- f->fd = fd;
- f->next = (struct _fdmap_ *)scgp->local;
- scgp->local = f;
- }
- return (fd);
- }
- EXPORT int
- scsi_initiator_id(scgp)
- SCSI *scgp;
- {
- return (-1);
- }
- EXPORT int
- scsi_isatapi(scgp)
- SCSI *scgp;
- {
- /*
- * XXX Should check for ATAPI
- */
- return (-1);
- }
- EXPORT int
- scsireset(scgp)
- SCSI *scgp;
- {
- return (-1);
- }
- LOCAL int
- scsi_send(scgp, f, sp)
- SCSI *scgp;
- int f;
- struct scg_cmd *sp;
- {
- int e;
- int scsi_error;
- int cam_error;
- raw_device_command rdc;
- if (f < 0) {
- sp->error = SCG_FATAL;
- return (0);
- }
- memcpy(rdc.command, &(sp->cdb), 12);
- rdc.command_length = sp->cdb_len;
- rdc.data = sp->addr;
- rdc.data_length = sp->size;
- rdc.sense_data_length = sp->sense_len;
- rdc.sense_data = sp->u_sense.cmd_sense;
- rdc.flags = sp->flags & SCG_RECV_DATA ? B_RAW_DEVICE_DATA_IN : 0;
- rdc.timeout = sp->timeout * 1000000;
- if (scgp->debug) {
- error("SEND(%d): cmd %02x, cdb = %d, data = %d, sense = %dn",
- f, rdc.command[0], rdc.command_length,
- rdc.data_length, rdc.sense_data_length);
- }
- e = ioctl(f, B_RAW_DEVICE_COMMAND, &rdc, sizeof(rdc));
- sp->ux_errno = 0;
- if (!e) {
- cam_error = rdc.cam_status;
- scsi_error = rdc.scsi_status;
- if (scgp->debug)
- error("result: cam %02x scsi %02xn", cam_error, scsi_error);
- sp->u_scb.cmd_scb[0] = scsi_error;
- switch (cam_error) {
- case CAM_REQ_CMP:
- sp->resid = 0;
- sp->error = SCG_NO_ERROR;
- break;
- case CAM_REQ_CMP_ERR:
- sp->sense_count = sp->sense_len; /* XXX */
- sp->error = SCG_RETRYABLE;
- break;
- default:
- sp->error = SCG_FATAL;
- }
- } else {
- sp->error = SCG_FATAL;
- }
- return (0);
- }