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-rw-r--r--libusal/scsi-dos.c562
1 files changed, 562 insertions, 0 deletions
diff --git a/libusal/scsi-dos.c b/libusal/scsi-dos.c
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+++ b/libusal/scsi-dos.c
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+/*
+ * This file has been modified for the cdrkit suite.
+ *
+ * The behaviour and appearence of the program code below can differ to a major
+ * extent from the version distributed by the original author(s).
+ *
+ * For details, see Changelog file distributed with the cdrkit package. If you
+ * received this file from another source then ask the distributing person for
+ * a log of modifications.
+ *
+ */
+
+/* @(#)scsi-dos.c 1.11 03/12/10 Copyright 1998-2003 J. Schilling, 2003 Alex Kopylov reanimatolog@yandex.ru */
+/*
+ * 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 _usal_version and _usal_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 version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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 <usal/aspi-dos.h>
+
+/*
+ * Warning: you may change this source, but if you do that
+ * you need to change the _usal_version and _usal_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.
+ */
+static char _usal_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 usal_local {
+ int dummy;
+};
+#define usallocal(p) ((struct usal_local *)((p)->local))
+
+#define MAX_DMA_DOS (63L*1024L)
+
+static BYTE busses = 1;
+static DWORD SCSIMgrEntry = 0;
+static int AspiLoaded = 0;
+
+static BOOL _callback_flag;
+static _go32_dpmi_seginfo _callback_info;
+static _go32_dpmi_registers _callback_regs;
+
+static BOOL SCSIMgrOpen(SCSI *);
+static void SCSIMgrClose(void);
+static int SCSIMgrSendSRB(SRB *, time_t);
+static void SCSIMgrCallBack(_go32_dpmi_registers *regs);
+
+static char *
+usalo_version(SCSI *usalp, int what)
+{
+ if (usalp != (SCSI *)0) {
+ switch (what) {
+
+ case SCG_VERSION:
+ return (_usal_trans_version);
+ case SCG_AUTHOR:
+ return (_usal_auth_cdrkit);
+ case SCG_SCCS_ID:
+ return (__sccsid);
+ }
+ }
+ return ((char *)0);
+}
+
+static int
+usalo_help(SCSI *usalp, FILE *f)
+{
+ __usal_help(f, "ASPI", "Generic transport independent SCSI",
+ "", "bus,target,lun", "1,2,0", TRUE, FALSE);
+ return (0);
+}
+
+static int
+usalo_open(SCSI *usalp, char *device)
+{
+ int busno = usal_scsibus(usalp);
+ int tgt = usal_target(usalp);
+ int tlun = usal_lun(usalp);
+
+ if (busno >= MAX_SCG || tgt >= MAX_TGT || tlun >= MAX_LUN) {
+ errno = EINVAL;
+ if (usalp->errstr)
+ snprintf(usalp->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 (usalp->errstr)
+ snprintf(usalp->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 (usalp->local == NULL) {
+ usalp->local = malloc(sizeof (struct usal_local));
+ if (usalp->local == NULL)
+ return (0);
+ }
+ /*
+ * Try to open ASPI-Router
+ */
+ if (!SCSIMgrOpen(usalp))
+ 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);
+}
+
+static int
+usalo_close(SCSI *usalp)
+{
+ SCSIMgrClose();
+ return (0);
+}
+
+static long
+usalo_maxdma(SCSI *usalp, long amt)
+{
+ return (MAX_DMA_DOS);
+}
+
+static void *
+usalo_getbuf(SCSI *usalp, long amt)
+{
+ if (usalp->debug > 0) {
+ fprintf((FILE *)usalp->errfile,
+ "usalo_getbuf: %ld bytes\n", amt);
+ }
+ usalp->bufbase = malloc((size_t)(amt));
+ return (usalp->bufbase);
+}
+
+static void
+usalo_freebuf(SCSI *usalp)
+{
+ if (usalp->bufbase)
+ free(usalp->bufbase);
+ usalp->bufbase = NULL;
+}
+
+static __SBOOL
+usalo_havebus(SCSI *usalp, int busno)
+{
+ if (busno < 0 || busno >= busses)
+ return (FALSE);
+
+ return (TRUE);
+}
+
+static int
+usalo_fileno(SCSI *usalp, 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);
+}
+
+static int
+usalo_initiator_id(SCSI *usalp)
+{
+ return (-1);
+}
+
+static int
+usalo_isatapi(SCSI *usalp)
+{
+ return (-1);
+}
+
+static int
+usalo_reset(SCSI *usalp, int what)
+{
+ errno = EINVAL;
+ return (-1);
+}
+
+static int
+usalo_send(SCSI *usalp)
+{
+ struct usal_cmd *sp = usalp->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 usalo_send: ASPI driver not loaded.\n");
+ sp->error = SCG_FATAL;
+ return (-1);
+ }
+
+ if (usalp->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;
+ fprintf((FILE *)usalp->errfile,
+ "Unsupported sp->cdb_len: %u. Fatal error in usalo_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 = usal_scsibus(usalp);
+ Srb.Type.ExecSCSICmd.Target = usal_target(usalp);
+ Srb.Type.ExecSCSICmd.Lun = usal_lun(usalp);
+ 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, usalp->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 (usalp->debug > 0) {
+ fprintf((FILE *)usalp->errfile,
+ "Timeout....\n");
+ }
+ sp->error = SCG_TIMEOUT;
+ return (1); /* Return error */
+ }
+
+ /*
+ * Check ASPI command status
+ */
+ if (Srb.Status != SS_COMP) {
+
+ if (usalp->debug > 0) {
+ fprintf((FILE *)usalp->errfile,
+ "Error in usalo_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 (usalp->debug > 0) {
+ fprintf((FILE *)usalp->errfile,
+ "Mapped to: error %d errno: %d\n", sp->error, sp->ux_errno);
+ }
+ return (1);
+ }
+
+ return (0);
+}
+
+static BOOL
+SCSIMgrOpen(SCSI *usalp)
+{
+ 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) {
+ fprintf((FILE *)usalp->errfile, "Cannot allocate callback address!\n");
+ SCSIMgrEntry = 0;
+ }
+ }
+
+ /* SCSIMgr entry point founded? */
+ if (!SCSIMgrEntry) {
+ fprintf((FILE *)usalp->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 (usalp->debug) {
+ fprintf((FILE *)usalp->errfile, "Status : %ld\n", Srb.Status);
+ fprintf((FILE *)usalp->errfile, "hacount: %d\n", Srb.Type.HAInquiry.Count);
+ fprintf((FILE *)usalp->errfile, "SCSI id: %d\n", Srb.Type.HAInquiry.SCSI_ID);
+ fprintf((FILE *)usalp->errfile, "Manager: '%.16s'\n", Srb.Type.HAInquiry.ManagerId);
+ fprintf((FILE *)usalp->errfile, "Identif: '%.16s'\n", Srb.Type.HAInquiry.Identifier);
+ usal_prbytes("Unique:", Srb.Type.HAInquiry.Unique, 16);
+ }
+
+ AspiLoaded++;
+ return (TRUE);
+}
+
+static void
+SCSIMgrClose()
+{
+ if (--AspiLoaded > 0)
+ return;
+ if (SCSIMgrEntry) {
+ _go32_dpmi_free_real_mode_callback(&_callback_info);
+ SCSIMgrEntry = 0;
+ }
+}
+
+static int
+SCSIMgrSendSRB(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);
+}
+
+static void
+SCSIMgrCallBack(_go32_dpmi_registers *regs)
+{
+ _callback_flag = 1;
+}
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