scsi-aix.c
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上传日期:2007-01-06
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文件大小:10k
- /* @(#)scsi-aix.c 1.19 99/10/07 Copyright 1997 J. Schilling */
- #ifndef lint
- static char __sccsid[] =
- "@(#)scsi-aix.c 1.19 99/10/07 Copyright 1997 J. Schilling";
- #endif
- /*
- * Interface for the AIX 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 <sys/scdisk.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-aix.c-1.19"; /* The version for this transport*/
- #define MAX_SCG 16 /* Max # of SCSI controllers */
- #define MAX_TGT 16
- #define MAX_LUN 8
- struct scg_local {
- short scgfiles[MAX_SCG][MAX_TGT][MAX_LUN];
- };
- #define scglocal(p) ((struct scg_local *)((p)->local))
- #define MAX_DMA_AIX (64*1024)
- 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));
- /*
- * 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 f;
- register int b;
- register int t;
- register int l;
- register int nopen = 0;
- char devname[32];
-
- 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 (scgp->local == NULL) {
- scgp->local = malloc(sizeof(struct scg_local));
- if (scgp->local == NULL)
- return (0);
- 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] = (short)-1;
- }
- }
- }
- if ((device != NULL && *device != ' ') || (busno == -2 && tgt == -2))
- goto openbydev;
- if (busno >= 0 && tgt >= 0 && tlun >= 0) {
- sprintf(devname, "/dev/rcd%d", tgt);
- f = openx(devname, 0, 0, SC_DIAGNOSTIC);
- if (f < 0) {
- if (scgp->errstr)
- js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
- "Cannot open '%s'. Specify device number (1 for cd1) as target (1,0)",
- devname);
- return (0);
- }
- scglocal(scgp)->scgfiles[busno][tgt][tlun] = f;
- return 1;
- } else {
- if (scgp->errstr)
- js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
- "Unable to scan on AIX");
- return (0);
- }
- openbydev:
- if (device != NULL && *device != ' ' && busno >= 0 && tgt >= 0 && tlun >= 0) {
- f = openx(device, 0, 0, SC_DIAGNOSTIC);
- if (f < 0) {
- if (scgp->errstr)
- js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
- "Cannot open '%s'",
- devname);
- return (0);
- }
- scgp->scsibus = busno;
- scgp->target = tgt;
- scgp->lun = tlun;
- scglocal(scgp)->scgfiles[busno][tgt][tlun] = f;
- return (++nopen);
- }
- return (nopen);
- }
- EXPORT int
- scsi_close(scgp)
- SCSI *scgp;
- {
- register int f;
- register int b;
- register int t;
- register int l;
- if (scgp->local == NULL)
- return (-1);
- for (b=0; b < MAX_SCG; b++) {
- for (t=0; t < MAX_TGT; t++) {
- for (l=0; l < MAX_LUN ; l++)
- f = scglocal(scgp)->scgfiles[b][t][l];
- if (f >= 0)
- close(f);
- scglocal(scgp)->scgfiles[b][t][l] = (short)-1;
- }
- }
- return (0);
- }
- LOCAL long
- scsi_maxdma(scgp)
- SCSI *scgp;
- {
- return (MAX_DMA_AIX);
- }
- #define palign(x, a) (((char *)(x)) + ((a) - 1 - (((unsigned)((x)-1))%(a))))
- EXPORT void *
- scsi_getbuf(scgp, amt)
- SCSI *scgp;
- long amt;
- {
- void *ret;
- int pagesize;
- #ifdef _SC_PAGESIZE
- pagesize = sysconf(_SC_PAGESIZE);
- #else
- pagesize = getpagesize();
- #endif
- if (amt <= 0 || amt > scsi_maxdma(scgp))
- return ((void *)0);
- if (scgp->debug)
- printf("scsi_getbuf: %ld bytesn", amt);
- /*
- * Damn AIX is a paged system but has no valloc()
- */
- scgp->bufbase = ret = malloc((size_t)(amt+pagesize));
- if (ret == NULL)
- return (ret);
- ret = palign(ret, pagesize);
- return (ret);
- }
- 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;
- register int l;
- if (busno < 0 || busno >= MAX_SCG)
- return (FALSE);
- if (scgp->local == NULL)
- return (FALSE);
- for (t=0; t < MAX_TGT; t++) {
- for (l=0; l < MAX_LUN ; l++)
- if (scglocal(scgp)->scgfiles[busno][t][l] >= 0)
- return (TRUE);
- }
- return (FALSE);
- }
- EXPORT
- int scsi_fileno(scgp, busno, tgt, tlun)
- SCSI *scgp;
- int busno;
- int tgt;
- int tlun;
- {
- if (busno < 0 || busno >= MAX_SCG ||
- tgt < 0 || tgt >= MAX_TGT ||
- tlun < 0 || tlun >= MAX_LUN)
- return (-1);
- if (scgp->local == NULL)
- return (-1);
- return ((int)scglocal(scgp)->scgfiles[busno][tgt][tlun]);
- }
- 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;
- {
- int f = scsi_fileno(scgp, scgp->scsibus, scgp->target, scgp->lun);
- return (ioctl(f, SCIORESET, IDLUN(scgp->target, scgp->lun)));
- }
- LOCAL int
- do_scsi_cmd(scgp, f, sp)
- SCSI *scgp;
- int f;
- struct scg_cmd *sp;
- {
- struct sc_iocmd req;
- int ret;
- if (sp->cdb_len > 12)
- comerrno(EX_BAD, "Can't do %d byte command.n", sp->cdb_len);
- fillbytes(&req, sizeof(req), ' ');
- req.flags = SC_ASYNC;
- if (sp->flags & SCG_RECV_DATA) {
- req.flags |= B_READ;
- } else if (sp->size > 0) {
- req.flags |= B_WRITE;
- }
- req.data_length = sp->size;
- req.buffer = sp->addr;
- req.timeout_value = sp->timeout;
- req.command_length = sp->cdb_len;
- movebytes(&sp->cdb, req.scsi_cdb, 12);
- errno = 0;
- ret = ioctl(f, DKIOCMD, &req);
- if (scgp->debug) {
- printf("ret: %d errno: %d (%s)n", ret, errno, errmsgstr(errno));
- printf("data_length: %dn", req.data_length);
- printf("buffer: 0x%Xn", req.buffer);
- printf("timeout_value: %dn", req.timeout_value);
- printf("status_validity: %dn", req.status_validity);
- printf("scsi_bus_status: 0x%Xn", req.scsi_bus_status);
- printf("adapter_status: 0x%Xn", req.adapter_status);
- printf("adap_q_status: 0x%Xn", req.adap_q_status);
- printf("q_tag_msg: 0x%Xn", req.q_tag_msg);
- printf("flags: 0X%Xn", req.flags);
- }
- if (ret < 0) {
- sp->ux_errno = geterrno();
- /*
- * Check if SCSI command cound not be send at all.
- */
- if (sp->ux_errno == ENOTTY || sp->ux_errno == ENXIO ||
- sp->ux_errno == EINVAL || sp->ux_errno == EACCES) {
- return (-1);
- }
- } else {
- sp->ux_errno = 0;
- }
- ret = 0;
- sp->sense_count = 0;
- sp->resid = 0; /* AIX is the same rubbish as Linux here */
- fillbytes(&sp->scb, sizeof(sp->scb), ' ');
- fillbytes(&sp->u_sense.cmd_sense, sizeof(sp->u_sense.cmd_sense), ' ');
- if (req.status_validity == 0) {
- sp->error = SCG_NO_ERROR;
- return (0);
- }
- if (req.status_validity & 1) {
- sp->u_scb.cmd_scb[0] = req.scsi_bus_status;
- sp->error = SCG_RETRYABLE;
- }
- if (req.status_validity & 2) {
- if (req.adapter_status & SC_NO_DEVICE_RESPONSE) {
- sp->error = SCG_FATAL;
- } else if (req.adapter_status & SC_CMD_TIMEOUT) {
- sp->error = SCG_TIMEOUT;
- } else if (req.adapter_status != 0) {
- sp->error = SCG_RETRYABLE;
- }
- }
- return (ret);
- }
- 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 = 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);
- }