/* @(#)scsi-dos.c 1.11 03/12/10 Copyright 1998-2003 J. Schilling, 2003 Alex Kopylov reanimatolog@yandex.ru */
#ifndef lint
static char __sccsid[] =
"@(#)scsi-dos.c 1.11 03/12/10 Copyright 1998-2003 J. Schilling, 2003 Alex Kopylov reanimatolog@yandex.ru";
#endif
/*
* Interface for the MS-DOS ASPI managers.
* You need ASPI manager installed in your config.sys:
* aspi*.sys for SCSI devices
* oakaspi.sys for ATAPI devices
* usbaspi.sys for USB devices
*
* Made from Win32 ASPI library template.
*
* 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) 1998-2003 J. Schilling
* Copyright (c) 1999 A.L. Faber for the first implementation
* of this interface.
* Copyright (c) 2003 Alex Kopylov reanimatolog@yandex.ru
*/
/*
* 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <dos.h>
#include <dpmi.h>
#include <go32.h>
#include <scg/aspi-dos.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-dos.c-1.11"; /* The version for this transport*/
#define MAX_SCG 8
#define MAX_TGT 8
#define MAX_LUN 8
struct scg_local {
int dummy;
};
#define scglocal(p) ((struct scg_local *)((p)->local))
#define MAX_DMA_DOS (63L*1024L)
LOCAL BYTE busses = 1;
LOCAL DWORD SCSIMgrEntry = 0;
LOCAL int AspiLoaded = 0;
LOCAL BOOL _callback_flag;
LOCAL _go32_dpmi_seginfo _callback_info;
LOCAL _go32_dpmi_registers _callback_regs;
LOCAL BOOL SCSIMgrOpen __PR((SCSI *));
LOCAL void SCSIMgrClose __PR((void));
LOCAL int SCSIMgrSendSRB __PR((SRB *, time_t));
LOCAL void SCSIMgrCallBack __PR((_go32_dpmi_registers *regs));
LOCAL char *
scgo_version(scgp, what)
SCSI *scgp;
int what;
{
if (scgp != (SCSI *)0) {
switch (what) {
case SCG_VERSION:
return (_scg_trans_version);
case SCG_AUTHOR:
return (_scg_auth_schily);
case SCG_SCCS_ID:
return (__sccsid);
}
}
return ((char *)0);
}
LOCAL int
scgo_help(scgp, f)
SCSI *scgp;
FILE *f;
{
__scg_help(f, "ASPI", "Generic transport independent SCSI",
"", "bus,target,lun", "1,2,0", TRUE, FALSE);
return (0);
}
LOCAL int
scgo_open(scgp, device)
SCSI *scgp;
char *device;
{
int busno = scg_scsibus(scgp);
int tgt = scg_target(scgp);
int tlun = scg_lun(scgp);
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 != '\0') || (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);
}
/*
* Check if variables are within the range
*/
if (tgt >= 0 && tgt >= 0 && tlun >= 0) {
/*
* This is the non -scanbus case.
*/
;
} else if (tgt != -1 || tgt != -1 || tlun != -1) {
errno = EINVAL;
return (-1);
}
if (scgp->local == NULL) {
scgp->local = malloc(sizeof (struct scg_local));
if (scgp->local == NULL)
return (0);
}
/*
* Try to open ASPI-Router
*/
if (!SCSIMgrOpen(scgp))
return (-1);
/*
* More than we have ...
*/
if (busno >= busses) {
SCSIMgrClose();
return (-1);
}
/*
* Install Exit Function which closes the ASPI-Router
*/
atexit(SCSIMgrClose);
/*
* Success after all
*/
return (1);
}
LOCAL int
scgo_close(scgp)
SCSI *scgp;
{
SCSIMgrClose();
return (0);
}
LOCAL long
scgo_maxdma(scgp, amt)
SCSI *scgp;
long amt;
{
return (MAX_DMA_DOS);
}
LOCAL void *
scgo_getbuf(scgp, amt)
SCSI *scgp;
long amt;
{
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile,
"scgo_getbuf: %ld bytes\n", amt);
}
scgp->bufbase = malloc((size_t)(amt));
return (scgp->bufbase);
}
LOCAL void
scgo_freebuf(scgp)
SCSI *scgp;
{
if (scgp->bufbase)
free(scgp->bufbase);
scgp->bufbase = NULL;
}
LOCAL __SBOOL
scgo_havebus(scgp, busno)
SCSI *scgp;
int busno;
{
if (busno < 0 || busno >= busses)
return (FALSE);
return (TRUE);
}
LOCAL int
scgo_fileno(scgp, busno, tgt, tlun)
SCSI *scgp;
int busno;
int tgt;
int tlun;
{
if (busno < 0 || busno >= busses ||
tgt < 0 || tgt >= MAX_TGT ||
tlun < 0 || tlun >= MAX_LUN)
return (-1);
/*
* Return fake
*/
return (1);
}
LOCAL int
scgo_initiator_id(scgp)
SCSI *scgp;
{
return (-1);
}
LOCAL int
scgo_isatapi(scgp)
SCSI *scgp;
{
return (-1);
}
LOCAL int
scgo_reset(scgp, what)
SCSI *scgp;
int what;
{
errno = EINVAL;
return (-1);
}
LOCAL int
scgo_send(scgp)
SCSI *scgp;
{
struct scg_cmd *sp = scgp->scmd;
SRB Srb;
int dos_memory_data_seg;
int dos_memory_data_sel;
DWORD dos_memory_data_ptr;
/*
* Check if ASPI library is loaded
*/
if (!SCSIMgrEntry) {
errmsgno(EX_BAD, "error in scgo_send: ASPI driver not loaded.\n");
sp->error = SCG_FATAL;
return (-1);
}
if (scgp->fd < 0) {
sp->error = SCG_FATAL;
return (0);
}
/*
* Initialize variables
*/
sp->error = SCG_NO_ERROR;
sp->sense_count = 0;
sp->u_scb.cmd_scb[0] = 0;
sp->resid = 0;
memset(&Srb, 0, sizeof (Srb));
switch (sp->cdb_len) {
case 6:
movebytes(&sp->cdb, &(Srb.Type.ExecSCSICmd.CmdLen._6.CDBByte), sp->cdb_len);
break;
case 10:
movebytes(&sp->cdb, &(Srb.Type.ExecSCSICmd.CmdLen._10.CDBByte), sp->cdb_len);
break;
case 12:
movebytes(&sp->cdb, &(Srb.Type.ExecSCSICmd.CmdLen._12.CDBByte), sp->cdb_len);
break;
default:
sp->error = SCG_FATAL;
sp->ux_errno = EINVAL;
js_fprintf((FILE *)scgp->errfile,
"Unsupported sp->cdb_len: %u. Fatal error in scgo_send, exiting...\n", sp->cdb_len);
return (-1);
}
if ((dos_memory_data_seg = __dpmi_allocate_dos_memory((sp->size>>4)+1, &dos_memory_data_sel)) == -1) {
sp->error = SCG_FATAL;
return (-1);
}
dos_memory_data_ptr = dos_memory_data_seg<<16;
_dosmemputb(sp->addr, sp->size, dos_memory_data_seg<<4);
Srb.Cmd = SC_EXEC_SCSI_CMD;
Srb.HaId = scg_scsibus(scgp);
Srb.Type.ExecSCSICmd.Target = scg_target(scgp);
Srb.Type.ExecSCSICmd.Lun = scg_lun(scgp);
Srb.Type.ExecSCSICmd.BufLen = sp->size;
Srb.Type.ExecSCSICmd.BufPointer = (void *)dos_memory_data_ptr;
Srb.Type.ExecSCSICmd.CDBLen = sp->cdb_len;
if (sp->sense_len <= (SENSE_LEN+2))
Srb.Type.ExecSCSICmd.SenseLen = sp->sense_len;
else
Srb.Type.ExecSCSICmd.SenseLen = (SENSE_LEN+2);
/*
* Enable SCSIMgrCallBack()
*/
Srb.Flags |= SRB_POSTING;
Srb.Type.ExecSCSICmd.PostProc = (void *)(_callback_info.rm_offset|(_callback_info.rm_segment<<16));
/*
* Do we receive data from this ASPI command?
*/
if (sp->flags & SCG_RECV_DATA) {
Srb.Flags |= SRB_DIR_IN;
} else {
/*
* Set direction to output
*/
if (sp->size > 0) {
Srb.Flags |= SRB_DIR_OUT;
}
}
SCSIMgrSendSRB(&Srb, scgp->scmd->timeout);
Srb.Type.ExecSCSICmd.BufPointer = sp->addr;
_dosmemgetb(dos_memory_data_seg<<4, sp->size, sp->addr);
__dpmi_free_dos_memory(dos_memory_data_sel);
if (Srb.Status == SS_PENDING) { /* Check if we got a timeout*/
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile,
"Timeout....\n");
}
sp->error = SCG_TIMEOUT;
return (1); /* Return error */
}
/*
* Check ASPI command status
*/
if (Srb.Status != SS_COMP) {
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile,
"Error in scgo_send: Srb.Status is 0x%x\n", Srb.Status);
}
switch (Srb.Status) {
case SS_COMP: /* 0x01 SRB completed without error */
sp->error = SCG_NO_ERROR;
sp->ux_errno = 0;
break;
case SS_PENDING: /* 0x00 SRB being processed */
case SS_ABORTED: /* 0x02 SRB aborted */
case SS_ABORT_FAIL: /* 0x03 Unable to abort SRB */
default:
sp->error = SCG_RETRYABLE;
sp->ux_errno = EIO;
break;
case SS_ERR: /* 0x04 SRB completed with error */
/*
* If the SCSI Status byte is != 0, we definitely could send
* the command to the target. We signal NO transport error.
*/
sp->error = SCG_NO_ERROR;
sp->ux_errno = EIO;
if (Srb.Type.ExecSCSICmd.TargStat)
break;
case SS_INVALID_CMD: /* 0x80 Invalid ASPI command */
case SS_INVALID_HA: /* 0x81 Invalid host adapter number */
case SS_NO_DEVICE: /* 0x82 SCSI device not installed */
sp->error = SCG_FATAL;
sp->ux_errno = EINVAL;
break;
}
sp->sense_count = Srb.Type.ExecSCSICmd.SenseLen;
if (sp->sense_count > sp->sense_len)
sp->sense_count = sp->sense_len;
memset(&sp->u_sense.Sense, 0x00, sizeof (sp->u_sense.Sense));
switch (sp->cdb_len) {
case 6:
memcpy(&sp->u_sense.Sense, Srb.Type.ExecSCSICmd.CmdLen._6.SenseArea, sp->sense_count);
break;
case 10:
memcpy(&sp->u_sense.Sense, Srb.Type.ExecSCSICmd.CmdLen._10.SenseArea, sp->sense_count);
break;
case 12:
memcpy(&sp->u_sense.Sense, Srb.Type.ExecSCSICmd.CmdLen._12.SenseArea, sp->sense_count);
break;
}
sp->u_scb.cmd_scb[0] = Srb.Type.ExecSCSICmd.TargStat;
if (scgp->debug > 0) {
js_fprintf((FILE *)scgp->errfile,
"Mapped to: error %d errno: %d\n", sp->error, sp->ux_errno);
}
return (1);
}
return (0);
}
LOCAL BOOL
SCSIMgrOpen(scgp)
SCSI *scgp;
{
int hSCSIMgr;
int dos_memory_seg;
int dos_memory_sel;
__dpmi_regs _regs;
SRB Srb;
if (SCSIMgrEntry) {
AspiLoaded++;
return (TRUE);
}
/*
* Open "SCSIMRG$"
*/
if (!_dos_open("SCSIMGR$", 0, &hSCSIMgr)) {
/* Alloc 16 bytes DOS memory */
if ((dos_memory_seg = __dpmi_allocate_dos_memory(1, &dos_memory_sel)) != -1) {
/* Look for SCSIMgr entry point */
memset(&_regs, 0, sizeof (_regs));
_regs.x.ax = 0x4402;
_regs.x.bx = hSCSIMgr;
_regs.x.cx = 0x0004;
_regs.x.ds = dos_memory_seg;
_regs.x.dx = 0x0000;
if (!__dpmi_simulate_real_mode_interrupt(0x21, &_regs)) {
_dosmemgetb(dos_memory_seg<<4, 4, &SCSIMgrEntry);
}
/* Free DOS memory */
__dpmi_free_dos_memory(dos_memory_sel);
}
/* Close "SCSIMRG$" */
_dos_close(hSCSIMgr);
/* Allocate real mode callback */
_callback_info.pm_offset = (unsigned long)&SCSIMgrCallBack;
if (_go32_dpmi_allocate_real_mode_callback_retf(&_callback_info, &_callback_regs) == -1) {
js_fprintf((FILE *)scgp->errfile, "Cannot allocate callback address!\n");
SCSIMgrEntry = 0;
}
}
/* SCSIMgr entry point founded? */
if (!SCSIMgrEntry) {
js_fprintf((FILE *)scgp->errfile, "Cannot open ASPI manager! Try to get one from http://bootcd.narod.ru/\n");
return (FALSE);
}
memset(&Srb, 0, sizeof (Srb));
Srb.Cmd = SC_HA_INQUIRY;
SCSIMgrSendSRB(&Srb, 10);
if (scgp->debug) {
js_fprintf((FILE *)scgp->errfile, "Status : %ld\n", Srb.Status);
js_fprintf((FILE *)scgp->errfile, "hacount: %d\n", Srb.Type.HAInquiry.Count);
js_fprintf((FILE *)scgp->errfile, "SCSI id: %d\n", Srb.Type.HAInquiry.SCSI_ID);
js_fprintf((FILE *)scgp->errfile, "Manager: '%.16s'\n", Srb.Type.HAInquiry.ManagerId);
js_fprintf((FILE *)scgp->errfile, "Identif: '%.16s'\n", Srb.Type.HAInquiry.Identifier);
scg_prbytes("Unique:", Srb.Type.HAInquiry.Unique, 16);
}
AspiLoaded++;
return (TRUE);
}
LOCAL void
SCSIMgrClose()
{
if (--AspiLoaded > 0)
return;
if (SCSIMgrEntry) {
_go32_dpmi_free_real_mode_callback(&_callback_info);
SCSIMgrEntry = 0;
}
}
LOCAL int
SCSIMgrSendSRB(Srb, timeout)
SRB *Srb;
time_t timeout;
{
int dos_memory_srb_seg;
int dos_memory_srb_sel;
DWORD dos_memory_srb_ptr;
struct timeval st;
struct timeval cr;
__dpmi_regs _regs;
/* Alloc DOS memory */
if ((dos_memory_srb_seg = __dpmi_allocate_dos_memory((sizeof (SRB) >> 4) + 1, &dos_memory_srb_sel)) == -1) {
Srb->Status = SS_NO_DEVICE; /* ??? fatal error */
return (Srb->Status);
}
dos_memory_srb_ptr = dos_memory_srb_seg<<16;
/* Copy SRB to DOS memory */
_dosmemputb((void *)Srb, sizeof (SRB), dos_memory_srb_seg<<4);
/* Reset callback flag */
_callback_flag = 0;
/* Call SCSIMgr */
memset(&_regs, 0, sizeof (_regs));
_regs.x.ip = SCSIMgrEntry & 0xffff;
_regs.x.cs = SCSIMgrEntry >> 16;
__dpmi_simulate_real_mode_procedure_retf_stack(&_regs, 2, &dos_memory_srb_ptr);
/* Wait 'timeout' seconds for Srb->Status != SS_PENDING */
gettimeofday(&st, NULL);
do {
_dosmemgetb(dos_memory_srb_seg << 4, sizeof (SRB), (void *)Srb);
gettimeofday(&cr, NULL);
} while ((Srb->Status == SS_PENDING) && (cr.tv_sec - st.tv_sec < timeout));
/* Free DOS memory */
__dpmi_free_dos_memory(dos_memory_srb_sel);
return (Srb->Status);
}
LOCAL void
SCSIMgrCallBack(regs)
_go32_dpmi_registers *regs;
{
_callback_flag = 1;
}
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