scsi-osf.c
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上传日期:2007-01-06
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- /* @(#)scsi-osf.c 1.12 99/10/15 Copyright 1998 J. Schilling */
- #ifndef lint
- static char __sccsid[] =
- "@(#)scsi-osf.c 1.12 99/10/15 Copyright 1998 J. Schilling";
- #endif
- /*
- * Interface for Digital UNIX (OSF/1 generic SCSI implementation (/dev/cam).
- *
- * Created out of the hacks from:
- * Stefan Traby <stefan@sime.com> and
- * Bruno Achauer <bruno@tk.uni-linz.ac.at>
- *
- * 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.
- */
- #include <sys/types.h>
- #include <io/common/iotypes.h>
- #include <io/cam/cam.h>
- #include <io/cam/uagt.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-osf.c-1.12"; /* The version for this transport*/
- #define MAX_SCG 16 /* Max # of SCSI controllers */
- #define MAX_TGT 16
- #define MAX_LUN 8
- struct scg_local {
- int scgfile; /* Used for ioctl() */
- short scgfiles[MAX_SCG][MAX_TGT][MAX_LUN];
- };
- #define scglocal(p) ((struct scg_local *)((p)->local))
- LOCAL BOOL scsi_checktgt __PR((SCSI *scgp, int f, int busno, int tgt, int tlun));
- /*
- * I don't have any documentation about CAM
- */
- #define MAX_DMA_OSF_CAM (64*1024)
- #ifndef AUTO_SENSE_LEN
- # define AUTO_SENSE_LEN 32 /* SCG_MAX_SENSE */
- #endif
- /*
- * 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;
- {
- register int b;
- register int t;
- register int l;
- 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);
- }
- 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);
- }
- if (scgp->local == NULL) {
- scgp->local = malloc(sizeof(struct scg_local));
- if (scgp->local == NULL)
- return (0);
- scglocal(scgp)->scgfile = -1;
- for (b=0; b < MAX_SCG; b++) {
- for (t=0; t < MAX_TGT; t++) {
- for (l=0; l < MAX_LUN ; l++)
- scglocal(scgp)->scgfiles[b][t][l] = 0;
- }
- }
- }
- if (scglocal(scgp)->scgfile != -1) /* multiple opens ??? */
- return (1); /* not yet ready .... */
- if ((scglocal(scgp)->scgfile = open("/dev/cam", O_RDWR, 0)) < 0) {
- if (scgp->errstr)
- js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
- "Cannot open '/dev/cam'");
- return (-1);
- }
- if (busno >= 0 && tgt >= 0 && tlun >= 0) {
- /* scsi_checktgt() ??? */
- for (l=0; l < MAX_LUN ; l++)
- scglocal(scgp)->scgfiles[b][t][l] = 1;
- return (1);
- }
- /*
- * There seems to be no clean way to check whether
- * a SCSI bus is present in the current system.
- * scsi_checktgt() is used as a workaround for this problem.
- */
- for (b=0; b < MAX_SCG; b++) {
- for (t=0; t < MAX_TGT; t++) {
- if (scsi_checktgt(scgp, scglocal(scgp)->scgfile, b, t, 0)) {
- for (l=0; l < MAX_LUN ; l++)
- scglocal(scgp)->scgfiles[b][t][l] = 1;
- /*
- * Found a target on this bus.
- * Comment the 'break' for a complete scan.
- */
- break;
- }
- }
- }
- return (1);
- }
- EXPORT int
- scsi_close(scgp)
- SCSI *scgp;
- {
- if (scgp->local == NULL)
- return (-1);
- if (scglocal(scgp)->scgfile >= 0)
- close(scglocal(scgp)->scgfile);
- scglocal(scgp)->scgfile = -1;
- return (0);
- }
- /*
- * We send a test unit ready command to the target to check whether the
- * OS is considering this target to be valid.
- */
- LOCAL BOOL
- scsi_checktgt(scgp, f, busno, tgt, tlun)
- SCSI *scgp;
- int f;
- int busno;
- int tgt;
- int tlun;
- {
- struct scg_cmd sc;
- int obus = scgp->scsibus;
- int otgt = scgp->target;
- int olun = scgp->lun;
- scgp->scsibus = busno;
- scgp->target = tgt;
- scgp->lun = tlun;
-
- fillbytes((caddr_t)&sc, sizeof(sc), ' ');
- sc.addr = (caddr_t)0;
- sc.size = 0;
- sc.flags = SCG_DISRE_ENA | SCG_SILENT;
- sc.cdb_len = SC_G0_CDBLEN;
- sc.sense_len = CCS_SENSE_LEN;
- sc.target = scgp->target;
- sc.cdb.g0_cdb.cmd = SC_TEST_UNIT_READY;
- sc.cdb.g0_cdb.lun = scgp->lun;
- scsi_send(scgp, f, &sc);
- scgp->scsibus = obus;
- scgp->target = otgt;
- scgp->lun = olun;
- if (sc.error != SCG_FATAL)
- return (TRUE);
- return (sc.ux_errno != EINVAL);
- }
- LOCAL long
- scsi_maxdma(scgp)
- SCSI *scgp;
- {
- long maxdma = MAX_DMA_OSF_CAM;
- return (maxdma);
- }
- 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 = valloc((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;
- {
- register int t;
- if (busno < 0 || busno >= MAX_SCG)
- return (FALSE);
- if (scgp->local == NULL)
- return (FALSE);
- for (t=0; t < MAX_TGT; t++) {
- if (scglocal(scgp)->scgfiles[busno][t][0] != 0)
- return (TRUE);
- }
- return (FALSE);
- }
- EXPORT
- int scsi_fileno(scgp, busno, tgt, tlun)
- SCSI *scgp;
- int busno;
- int tgt;
- int tlun;
- {
- if (scgp->local == NULL)
- return (-1);
- return (busno < 0 || busno >= MAX_SCG) ? -1 : scglocal(scgp)->scgfile;
- }
- EXPORT int
- scsi_initiator_id(scgp)
- SCSI *scgp;
- {
- return (-1);
- }
- EXPORT
- int scsi_isatapi(scgp)
- SCSI *scgp;
- {
- return (FALSE);
- }
- EXPORT
- int scsireset(scgp)
- SCSI *scgp;
- {
- #ifdef XXX
- int f = scsi_fileno(scgp, scgp->scsibus, scgp->target, scgp->lun);
- return (ioctl(f, SCGIORESET, 0));
- #else
- return (-1);
- #endif
- }
- LOCAL int
- scsi_send(scgp, f, sp)
- SCSI *scgp;
- int f;
- struct scg_cmd *sp;
- {
- CCB_SCSIIO ccb;
- UAGT_CAM_CCB ua;
- unsigned char *cdb;
- CCB_RELSIM relsim;
- UAGT_CAM_CCB relua;
- int i;
- if (f < 0) {
- sp->error = SCG_FATAL;
- return (0);
- }
- fillbytes(&ua, sizeof(UAGT_CAM_CCB), 0);
- fillbytes(&ccb, sizeof(CCB_SCSIIO), 0);
- ua.uagt_ccb = (CCB_HEADER *) &ccb;
- ua.uagt_ccblen = sizeof(CCB_SCSIIO);
- ccb.cam_ch.my_addr = (CCB_HEADER *) &ccb;
- ccb.cam_ch.cam_ccb_len = sizeof(CCB_SCSIIO);
- ua.uagt_snsbuf = ccb.cam_sense_ptr = sp->u_sense.cmd_sense;
- ua.uagt_snslen = ccb.cam_sense_len = AUTO_SENSE_LEN;
- cdb = (unsigned char *) ccb.cam_cdb_io.cam_cdb_bytes;
- ccb.cam_timeout = sp->timeout;
- ccb.cam_data_ptr = ua.uagt_buffer = (u_char *) sp->addr;
- ccb.cam_dxfer_len = ua.uagt_buflen = sp->size;
- ccb.cam_ch.cam_func_code = XPT_SCSI_IO;
- ccb.cam_ch.cam_flags = 0; /* CAM_DIS_CALLBACK; */
- if (sp->size == 0) {
- ccb.cam_data_ptr = ua.uagt_buffer = (u_char *) NULL;
- ccb.cam_ch.cam_flags |= CAM_DIR_NONE;
- } else {
- if (sp->flags & SCG_RECV_DATA) {
- ccb.cam_ch.cam_flags |= CAM_DIR_IN;
- } else {
- ccb.cam_ch.cam_flags |= CAM_DIR_OUT;
- }
- }
- ccb.cam_cdb_len = sp->cdb_len;
- for (i = 0; i < sp->cdb_len; i++)
- cdb[i] = sp->cdb.cmd_cdb[i];
- ccb.cam_ch.cam_path_id = scgp->scsibus;
- ccb.cam_ch.cam_target_id = scgp->target;
- ccb.cam_ch.cam_target_lun = scgp->lun;
- sp->sense_count = 0;
- sp->ux_errno = 0;
- sp->error = SCG_NO_ERROR;
- if (ioctl(f, UAGT_CAM_IO, (caddr_t) &ua) < 0) {
- sp->ux_errno = geterrno();
- sp->error = SCG_FATAL;
- if (scgp->debug) {
- errmsg("ioctl(f, UAGT_CAM_IO, dev=%d,%d,%d) failed.n",
- scgp->scsibus, scgp->target, scgp->lun);
- }
- return (0);
- }
- if (scgp->debug) {
- errmsgno(EX_BAD, "cam_status = 0x%.2X dev=%d,%d,%dn",
- ccb.cam_ch.cam_status,
- scgp->scsibus, scgp->target, scgp->lun);
- fflush(stderr);
- }
- switch (ccb.cam_ch.cam_status & CAM_STATUS_MASK) {
- case CAM_REQ_CMP: break;
- case CAM_SEL_TIMEOUT: sp->error = SCG_FATAL;
- sp->ux_errno = EIO;
- break;
- case CAM_CMD_TIMEOUT: sp->error = SCG_TIMEOUT;
- sp->ux_errno = EIO;
- break;
- default: sp->error = SCG_RETRYABLE;
- sp->ux_errno = EIO;
- break;
- }
- sp->u_scb.cmd_scb[0] = ccb.cam_scsi_status;
- if (ccb.cam_ch.cam_status & CAM_AUTOSNS_VALID) {
- sp->sense_count = MIN(ccb.cam_sense_len - ccb.cam_sense_resid,
- SCG_MAX_SENSE);
- sp->sense_count = MIN(sp->sense_count, sp->sense_len);
- if (sp->sense_len < 0)
- sp->sense_count = 0;
- }
- sp->resid = ccb.cam_resid;
- /*
- * this is perfectly wrong.
- * But without this, we hang...
- */
- if (ccb.cam_ch.cam_status & CAM_SIM_QFRZN) {
- fillbytes(&relsim, sizeof(CCB_RELSIM), 0);
- relsim.cam_ch.cam_ccb_len = sizeof(CCB_SCSIIO);
- relsim.cam_ch.cam_func_code = XPT_REL_SIMQ;
- relsim.cam_ch.cam_flags = CAM_DIR_IN | CAM_DIS_CALLBACK;
- relsim.cam_ch.cam_path_id = scgp->scsibus;
- relsim.cam_ch.cam_target_id = scgp->target;
- relsim.cam_ch.cam_target_lun = scgp->lun;
- relua.uagt_ccb = (struct ccb_header *) & relsim; /* wrong cast */
- relua.uagt_ccblen = sizeof(relsim);
- relua.uagt_buffer = NULL;
- relua.uagt_buflen = 0;
- if (ioctl(f, UAGT_CAM_IO, (caddr_t) & relua) < 0)
- errmsg("DEC CAM -> LMAn");
- }
- return 0;
- }