scsi-vms.c
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上传日期:2007-01-06
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- /* @(#)scsi-vms.c 1.15 99/09/17 Copyright 1997 J. Schilling */
- #ifndef lint
- static char __sccsid[] =
- "@(#)scsi-vms.c 1.15 99/09/17 Copyright 1997 J. Schilling";
- #endif
- /*
- * Interface for the VMS generic SCSI implementation.
- *
- * This is a hack, that tries to emulate the functionality
- * of the scg driver.
- *
- * 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) 1997 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 <iodef.h>
- #include <ssdef.h>
- #include <descrip.h>
- #include <starlet.h>
- #include <string.h>
- #include <LIB$ROUTINES.H>
- /*
- * Warning: you may change this source, but if you do that
- * you need to change the _scg_version and _scg_auth* string below.
- * You may not return "schily" for an SCG_AUTHOR request anymore.
- * Choose your name instead of "schily" and make clear that the version
- * string is related to a modified source.
- */
- LOCAL char _scg_trans_version[] = "scsi-vms.c-1.15"; /* The version for this transport*/
- #define MAX_SCG 16 /* Max # of SCSI controllers */
- #define MAX_TGT 16
- #define MAX_LUN 8
- #define MAX_DMA_VMS (96*512)/* Check if this is not too big */
- #define MAX_PHSTMO_VMS 300
- #define MAX_DSCTMO_VMS 65535 /* max value for OpenVMS/AXP 7.1 ehh*/
- LOCAL int do_scsi_cmd __PR((SCSI *scgp, int f, struct scg_cmd *sp));
- LOCAL int do_scsi_sense __PR((SCSI *scgp, int f, struct scg_cmd *sp));
- #define DEVICE_NAMELEN 7
- struct SCSI$DESC {
- Uint SCSI$L_OPCODE; /* SCSI Operation Code */
- Uint SCSI$L_FLAGS; /* SCSI Flags Bit Map */
- char *SCSI$A_CMD_ADDR; /* ->SCSI command buffer */
- Uint SCSI$L_CMD_LEN; /* SCSI command length, bytes */
- char *SCSI$A_DATA_ADDR; /* ->SCSI data buffer */
- Uint SCSI$L_DATA_LEN; /* SCSI data length, bytes */
- Uint SCSI$L_PAD_LEN; /* SCSI pad length, bytes */
- Uint SCSI$L_PH_CH_TMOUT; /* SCSI phase change timeout */
- Uint SCSI$L_DISCON_TMOUT; /* SCSI disconnect timeout */
- Uint SCSI$L_RES_1; /* Reserved */
- Uint SCSI$L_RES_2; /* Reserved */
- Uint SCSI$L_RES_3; /* Reserved */
- Uint SCSI$L_RES_4; /* Reserved */
- Uint SCSI$L_RES_5; /* Reserved */
- Uint SCSI$L_RES_6; /* Reserved */
- };
- #ifdef __ALPHA
- #pragma member_alignment save
- #pragma nomember_alignment
- #endif
- struct SCSI$IOSB {
- Ushort SCSI$W_VMS_STAT; /* VMS status code */
- Ulong SCSI$L_IOSB_TFR_CNT; /* Actual #bytes transferred */
- char SCSI$B_IOSB_FILL_1;
- Uchar SCSI$B_IOSB_STS; /* SCSI device status */
- };
- #ifdef __ALPHA
- #pragma member_alignment restore
- #endif
- #define SCSI$K_GOOD_STATUS 0
- #define SCSI$K_CHECK_CONDITION 0x2
- #define SCSI$K_CONDITION_MET 0x4
- #define SCSI$K_BUSY 0x8
- #define SCSI$K_INTERMEDIATE 0x10
- #define SCSI$K_INTERMEDIATE_C_MET 0x14
- #define SCSI$K_RESERVATION_CONFLICT 0x18
- #define SCSI$K_COMMAND_TERMINATED 0x22
- #define SCSI$K_QUEUE_FULL 0x28
- #define SCSI$K_WRITE 0X0 /* direction of transfer=write */
- #define SCSI$K_READ 0X1 /* direction of transfer=read */
- #define SCSI$K_FL_ENAB_DIS 0X2 /* enable disconnects */
- #define SCSI$K_FL_ENAB_SYNC 0X4 /* enable sync */
- #define GK_EFN 0 /* Event flag number */
- static char gk_device[8]; /* XXX JS hoffentlich gibt es keinen Ueberlauf */
- static Ushort gk_chan;
- static Ushort transfer_length;
- static int i;
- static int status;
- static $DESCRIPTOR(gk_device_desc, gk_device);
- static struct SCSI$IOSB gk_iosb ;
- static struct SCSI$DESC gk_desc;
- static FILE *fp;
- struct scg_local {
- Ushort gk_chan;
- };
- #define scglocal(p) ((struct scg_local *)((p)->local))
- /*
- * 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;
- {
- char devname[DEVICE_NAMELEN];
- char buschar;
- char buschar1;
- 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);
- }
- switch (busno) {
- case 0: buschar = 'd';
- buschar1 = 'a';
- break;
- case 1: buschar = 'd';
- buschar1 = 'b';
- break;
- case 2: buschar = 'd';
- buschar1 = 'c';
- break;
- case 3: buschar = 'd';
- buschar1 = 'd';
- break;
- case 4: buschar = 'g';
- buschar1 = 'a';
- break;
- case 5: buschar = 'g';
- buschar1 = 'b';
- break;
- case 6: buschar = 'g';
- buschar1 = 'c';
- break;
- case 7: buschar = 'g';
- buschar1 = 'd';
- break;
- default :
- if (scgp->errstr)
- js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
- "Wrong scsibus-# (%d)", busno);
- return (-1);
- }
- /* XXX JS XXX devname length snprintf ??? */
- sprintf(devname, "%ck%c%d0%d:", buschar, buschar1, tgt, tlun);
- strcpy (gk_device, devname);
- status = sys$assign(&gk_device_desc, &gk_chan, 0, 0);
- if (!(status & 1)) {
- printf("Unable to access scsi-device "%s"n", &gk_device[0]);
- return (-1);
- }
- if (scgp->debug) {
- fp = fopen("cdrecord_io.log","w","rfm=stmlf","rat=cr");
- if (fp == NULL) {
- perror("Failing opening i/o-logfile");
- exit(SS$_NORMAL);
- }
- }
- return (status);
- }
- EXPORT int
- scsi_close(scgp)
- SCSI *scgp;
- {
- /*
- * XXX close gk_chan ???
- */
- return (0);
- }
- LOCAL long
- scsi_maxdma(scgp)
- SCSI *scgp;
- {
- return (MAX_DMA_VMS);
- }
- EXPORT
- BOOL scsi_havebus(scgp, busno)
- SCSI *scgp;
- int busno;
- {
- if (gk_chan <= 0)
- return (FALSE);
- return (TRUE);
- }
- EXPORT
- int scsi_fileno(scgp, busno, tgt, tlun)
- SCSI *scgp;
- int busno;
- int tgt;
- int tlun;
- {
- if (gk_chan <= 0)
- return (-1);
- return (gk_chan);
- }
- EXPORT int
- scsi_initiator_id(scgp)
- SCSI *scgp;
- {
- return (-1);
- }
- EXPORT
- int scsi_isatapi(scgp)
- SCSI *scgp;
- {
- return (FALSE);
- }
- EXPORT
- int scsireset(scgp)
- SCSI *scgp;
- {
- return (-1);
- }
- EXPORT void *
- scsi_getbuf(scgp, amt)
- SCSI *scgp;
- long amt;
- {
- if (amt <= 0 || amt > scsi_maxdma(scgp))
- return ((void *)0);
- if (scgp->debug)
- printf("scsi_getbuf: %ld bytesn", amt);
- scgp->bufbase = malloc((size_t)(amt)); /* XXX JS XXX valloc() ??? */
- return (scgp->bufbase);
- }
- EXPORT void
- scsi_freebuf(scgp)
- SCSI *scgp;
- {
- if (scgp->bufbase)
- free(scgp->bufbase);
- scgp->bufbase = NULL;
- }
- LOCAL int
- do_scsi_cmd(scgp, f, sp)
- SCSI *scgp;
- int f;
- struct scg_cmd *sp;
- {
- char *cmdadr;
- int notcmdretry;
- int len;
- int severity;
- /* XXX JS XXX This cannot be OK */
- notcmdretry = (sp->flags & SCG_CMD_RETRY)^SCG_CMD_RETRY;
- /* error corrected ehh */
- /* XXX JS Wenn das notcmdretry Flag bei VMS auch 0x08 ist und Du darauf hoffst,
- XXX Dasz ich den Wert nie aendere, dann ist das richtig.
- XXX Siehe unten: Das gleiche gilt fuer SCG_RECV_DATA und SCG_DISRE_ENA !!!
- */
- cmdadr = (char *)sp->cdb.cmd_cdb;
- /* XXX JS XXX This cannot be OK */
- gk_desc.SCSI$L_FLAGS = ((sp->flags & SCG_RECV_DATA) |
- (sp->flags & SCG_DISRE_ENA)|
- notcmdretry);
- /* XXX siehe oben, das ist ein bitweises oder!!! */
- gk_desc.SCSI$A_DATA_ADDR = sp->addr;
- gk_desc.SCSI$L_DATA_LEN = sp->size;
- gk_desc.SCSI$A_CMD_ADDR = cmdadr;
- gk_desc.SCSI$L_CMD_LEN = sp->cdb_len;
- gk_desc.SCSI$L_PH_CH_TMOUT = sp->timeout;
- gk_desc.SCSI$L_DISCON_TMOUT = sp->timeout;
- if (gk_desc.SCSI$L_PH_CH_TMOUT > MAX_PHSTMO_VMS)
- gk_desc.SCSI$L_PH_CH_TMOUT = MAX_PHSTMO_VMS;
- if (gk_desc.SCSI$L_DISCON_TMOUT > MAX_DSCTMO_VMS)
- gk_desc.SCSI$L_DISCON_TMOUT = MAX_DSCTMO_VMS;
- gk_desc.SCSI$L_OPCODE = 1; /* SCSI Operation Code */
- gk_desc.SCSI$L_PAD_LEN = 0; /* SCSI pad length, bytes */
- gk_desc.SCSI$L_RES_1 = 0; /* Reserved */
- gk_desc.SCSI$L_RES_2 = 0; /* Reserved */
- gk_desc.SCSI$L_RES_3 = 0; /* Reserved */
- gk_desc.SCSI$L_RES_4 = 0; /* Reserved */
- gk_desc.SCSI$L_RES_5 = 0; /* Reserved */
- gk_desc.SCSI$L_RES_6 = 0; /* Reserved */
- if (scgp->debug) {
- fprintf(fp, "***********************************************************n");
- fprintf(fp, "SCSI VMS-I/O parametersn");
- fprintf(fp, "OPCODE: %d", gk_desc.SCSI$L_OPCODE);
- fprintf(fp, " FLAGS: %dn", gk_desc.SCSI$L_FLAGS);
- fprintf(fp, "CMD:");
- for (i = 0; i < gk_desc.SCSI$L_CMD_LEN; i++) {
- fprintf(fp, "%x ", sp->cdb.cmd_cdb[i]);
- }
- fprintf(fp, "n");
- fprintf(fp, "DATA_LEN: %dn", gk_desc.SCSI$L_DATA_LEN);
- fprintf(fp, "PH_CH_TMOUT: %d", gk_desc.SCSI$L_PH_CH_TMOUT);
- fprintf(fp, " DISCON_TMOUT: %dn", gk_desc.SCSI$L_DISCON_TMOUT);
- }
- status = sys$qiow(GK_EFN, gk_chan, IO$_DIAGNOSE, &gk_iosb, 0, 0,
- &gk_desc, sizeof(gk_desc), 0, 0, 0, 0);
- if (scgp->debug) {
- fprintf(fp, "qiow-status: %in", status);
- fprintf(fp, "VMS status code %in",gk_iosb.SCSI$W_VMS_STAT);
- fprintf(fp, "Actual #bytes transferred %in",gk_iosb.SCSI$L_IOSB_TFR_CNT);
- fprintf(fp, "SCSI device status %in",gk_iosb.SCSI$B_IOSB_STS);
- if (gk_iosb.SCSI$L_IOSB_TFR_CNT != gk_desc.SCSI$L_DATA_LEN) {
- fprintf(fp,"#bytes transferred != DATA_LENn");
- }
- }
- if (!(status & 1)) { /* Fehlerindikation fuer sys$qiow() */
- sp->ux_errno = geterrno();
- /* schwerwiegender nicht SCSI bedingter Fehler => return(-1) */
- if (sp->ux_errno == ENOTTY || sp->ux_errno == ENXIO ||
- sp->ux_errno == EINVAL || sp->ux_errno == EACCES) {
- return (-1);
- }
- } else {
- sp->ux_errno = 0;
- }
- sp->resid = gk_desc.SCSI$L_DATA_LEN - gk_iosb.SCSI$L_IOSB_TFR_CNT;
- if (gk_iosb.SCSI$W_VMS_STAT == SS$_NORMAL &&
- gk_iosb.SCSI$B_IOSB_STS == 0) {
- sp->error = SCG_NO_ERROR;
- if (scgp->debug) {
- fprintf(fp,"gk_iosb.SCSI$B_IOSB_STS == 0n");
- fprintf(fp,"sp->error %in",sp->error);
- fprintf(fp,"sp->resid %in",sp->resid);
- }
- return(0);
- }
- severity = gk_iosb.SCSI$W_VMS_STAT & 0x7;
- if (severity == 4) {
- sp->error = SCG_FATAL;
- if (scgp->debug) {
- fprintf(fp,"gk_iosb.SCSI$B_IOSB_STS & 2n");
- fprintf(fp,"gk_iosb.SCSI$W_VMS_STAT & 0x7 == SS$_FATALn");
- fprintf(fp,"sp->error %in",sp->error);
- }
- return (0);
- }
- if (gk_iosb.SCSI$W_VMS_STAT == SS$_TIMEOUT) {
- sp->error = SCG_TIMEOUT;
- if (scgp->debug) {
- fprintf(fp,"gk_iosb.SCSI$B_IOSB_STS & 2n");
- fprintf(fp,"gk_iosb.SCSI$W_VMS_STAT == SS$_TIMEOUTn");
- fprintf(fp,"sp->error %in",sp->error);
- }
- return (0);
- }
- sp->error = SCG_RETRYABLE;
- sp->ux_errno = EIO;
- sp->u_scb.cmd_scb[0] = gk_iosb.SCSI$B_IOSB_STS;
- if (scgp->debug) {
- fprintf(fp,"gk_iosb.SCSI$B_IOSB_STS & 2n");
- fprintf(fp,"gk_iosb.SCSI$W_VMS_STAT != 0n");
- fprintf(fp,"sp->error %in",sp->error);
- }
- return(0);
- }
- LOCAL int
- do_scsi_sense(scgp, f, sp)
- SCSI *scgp;
- int f;
- struct scg_cmd *sp;
- {
- int ret;
- struct scg_cmd s_cmd;
- if (sp->sense_len > SCG_MAX_SENSE)
- sp->sense_len = SCG_MAX_SENSE;
- fillbytes((caddr_t)&s_cmd, sizeof(s_cmd), ' ');
- s_cmd.addr = (char *)sp->u_sense.cmd_sense;
- s_cmd.size = sp->sense_len;
- s_cmd.flags = SCG_RECV_DATA|SCG_DISRE_ENA;
- s_cmd.cdb_len = SC_G0_CDBLEN;
- s_cmd.sense_len = CCS_SENSE_LEN;
- s_cmd.target = scgp->target;
- s_cmd.cdb.g0_cdb.cmd = SC_REQUEST_SENSE;
- s_cmd.cdb.g0_cdb.lun = sp->cdb.g0_cdb.lun;
- s_cmd.cdb.g0_cdb.count = sp->sense_len;
- ret = do_scsi_cmd(scgp, f, &s_cmd);
- if (ret < 0)
- return (ret);
- if (s_cmd.u_scb.cmd_scb[0] & 02) {
- /* XXX ??? Check condition on request Sense ??? */
- }
- sp->sense_count = sp->sense_len - s_cmd.resid;
- return (ret);
- }
- LOCAL int
- scsi_send(scgp, f, sp)
- SCSI *scgp;
- int f;
- struct scg_cmd *sp;
- {
- int ret;
- if (f < 0) {
- sp->error = SCG_FATAL;
- return (0);
- }
- ret = do_scsi_cmd(scgp, f, sp);
- if (ret < 0)
- return (ret);
- if (sp->u_scb.cmd_scb[0] & 02)
- ret = do_scsi_sense(scgp, f, sp);
- return (ret);
- }