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NT4/private/ntos/dd/qic117/0x1103f.c
Microsoft ce47f986d8 First commit
2020-09-30 17:12:29 +02:00

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/*****************************************************************************
*
* COPYRIGHT 1993 - COLORADO MEMORY SYSTEMS, INC.
* ALL RIGHTS RESERVED.
*
******************************************************************************
*
* FILE: \SE\DRIVER\DEVICE\JUMBO\SRC\0X1103F.C
*
* FUNCTION: cqd_Seek
*
* PURPOSE: Reposition tape for desired track and block.
*
* Change track first if necessary.
*
* Seek at high speed to approximately get to the specified
* area on the tape.
*
* Read ID marks from the tape until the tape is positioned 1
* block in front of (logically) the desired block.
*
* HISTORY:
* $Log: J:\se.vcs\driver\q117cd\src\0x1103f.c $
*
* Rev 1.14 15 May 1995 10:47:46 GaryKiwi
* Phoenix merge from CBW95s
*
* Rev 1.13.1.0 11 Apr 1995 18:04:22 garykiwi
* PHOENIX pass #1
*
* Rev 1.14 30 Jan 1995 14:24:06 BOBLEHMA
* Changed device_descriptor.version to cqd_context->firmware_version.
*
* Rev 1.13 29 Aug 1994 12:06:26 BOBLEHMA
* Changed the interface to cqd_CmdRetension. Added a number of segments parameter.
*
* Rev 1.12 07 Mar 1994 15:22:10 KEVINKES
* Modified to check segment proximity before returning a seek error.
*
* Rev 1.11 17 Feb 1994 11:43:48 KEVINKES
* Added an extra parameter to WaitCC.
*
* Rev 1.10 01 Feb 1994 12:28:22 KEVINKES
* Added seek debug statements.
*
* Rev 1.9 27 Jan 1994 15:54:00 KEVINKES
* Added debug code and modified the new tape seek recovery to clear
* the new tape flags.
*
* Rev 1.8 24 Jan 1994 17:35:44 KEVINKES
* Added seek debug code.
*
* Rev 1.7 18 Jan 1994 16:21:28 KEVINKES
* Updated debug code.
*
* Rev 1.6 18 Jan 1994 14:47:06 CHETDOUG
* On failed seeks issue the new tape cmd before doing the retension.
* This could prevent despooling of the tape if there is zone confusion.....
*
* Rev 1.5 11 Jan 1994 15:07:18 KEVINKES
* Modified to change max seek depending on the type of seek being used.
* Also added a call to ClearTapeError to fix a zone confusion bug
* found in Jumbo C FW.
*
* Rev 1.4 20 Dec 1993 14:43:40 KEVINKES
* Added an argument to cqd_LogicalBOT.
*
* Rev 1.3 23 Nov 1993 18:49:54 KEVINKES
* Modified CHECKED_DUMP calls for debugging over the serial port.
*
* Rev 1.2 15 Nov 1993 16:22:08 KEVINKES
* Added abort handling.
*
* Rev 1.1 08 Nov 1993 14:05:50 KEVINKES
* Removed all bit-field structures, removed all enumerated types, changed
* all defines to uppercase, and removed all signed data types wherever
* possible.
*
* Rev 1.0 18 Oct 1993 17:20:04 KEVINKES
* Initial Revision.
*
*****************************************************************************/
#define FCT_ID 0x1103f
#include "include\public\adi_api.h"
#include "include\public\frb_api.h"
#include "include\public\vendor.h"
#include "include\private\kdi_pub.h"
#include "include\private\cqd_pub.h"
#include "q117cd\include\cqd_defs.h"
#include "q117cd\include\cqd_strc.h"
#include "q117cd\include\cqd_hdr.h"
/*endinclude*/
dStatus cqd_Seek
(
/* INPUT PARAMETERS: */
CqdContextPtr cqd_context
/* UPDATE PARAMETERS: */
/* OUTPUT PARAMETERS: */
)
/* COMMENTS: *****************************************************************
*
* DEFINITIONS: *************************************************************/
{
/* DATA: ********************************************************************/
dStatus status=DONT_PANIC; /* dStatus or error condition.*/
dBoolean new_track;
dSWord seek_count;
dBoolean retension_flag = dFALSE;
dSDWord segment_proximity=0l;
/* CODE: ********************************************************************/
new_track = dFALSE;
if (cqd_context->drive_parms.seek_mode == SEEK_TIMED) {
seek_count = MAX_SEEK_COUNT_TIME;
} else {
seek_count = MAX_SEEK_COUNT_SKIP;
}
do {
DBG_ADD_ENTRY(QIC117DBGSEEK, cqd_context, DBG_SEEK_PHASE);
DBG_ADD_ENTRY(QIC117DBGSEEK, cqd_context, 1);
DBG_ADD_ENTRY(QIC117DBGSEEK, cqd_context, DBG_C_SEG);
DBG_ADD_ENTRY(QIC117DBGSEEK, cqd_context, cqd_context->operation_status.current_segment);
DBG_ADD_ENTRY(QIC117DBGSEEK, cqd_context, DBG_D_SEG);
DBG_ADD_ENTRY(QIC117DBGSEEK, cqd_context, cqd_context->rd_wr_op.d_segment);
DBG_ADD_ENTRY(QIC117DBGSEEK, cqd_context, DBG_D_TRK);
DBG_ADD_ENTRY(QIC117DBGSEEK, cqd_context, cqd_context->rd_wr_op.d_track);
if (cqd_context->cms_mode) {
status = cqd_CMSSetupTrack(cqd_context, &new_track);
} else {
if (cqd_context->rd_wr_op.d_segment == 0) {
if ((status = cqd_LogicalBOT(
cqd_context,
cqd_context->rd_wr_op.d_track)) != DONT_PANIC) {
return status;
}
}
if (cqd_context->rd_wr_op.d_track !=
cqd_context->operation_status.current_track) {
if ((status = cqd_ChangeTrack(
cqd_context,
cqd_context->rd_wr_op.d_track)) != DONT_PANIC) {
return status;
}
if (!cqd_context->rd_wr_op.bot &&
!cqd_context->rd_wr_op.eot) {
new_track = dTRUE;
}
}
}
if (cqd_context->rd_wr_op.d_segment == 0) {
return DONT_PANIC;
}
if (new_track == dTRUE) {
status = cqd_ReadIDRepeat(cqd_context);
}
if (status == DONT_PANIC) {
status = cqd_HighSpeedSeek(cqd_context);
}
if (status == DONT_PANIC) {
status = cqd_ReadIDRepeat(cqd_context);
}
DBG_ADD_ENTRY(QIC117DBGSEEK, cqd_context, DBG_SEEK_ERR);
DBG_ADD_ENTRY(QIC117DBGSEEK, cqd_context, status);
--seek_count;
if (((kdi_GetErrorType(status) == ERR_SEEK_FAILED) ||
(seek_count == 0)) && (retension_flag == dFALSE)) {
if ((status = cqd_StopTape(cqd_context)) != DONT_PANIC) {
return status;
}
/* Issue the new tape command before retensioning the tape.
* In the case of a failed seek because of zone confusion,
* retensioning the tape before the new tape could unspool
* the tape. */
if ((cqd_context->device_descriptor.vendor == VENDOR_CMS) &&
(cqd_context->firmware_version >= FIRM_VERSION_80)) {
if ((status = cqd_SendByte(cqd_context, FW_CMD_NEW_TAPE)) == DONT_PANIC) {
if ((status = cqd_WaitCommandComplete(
cqd_context,
INTERVAL_LOAD_POINT,
dTRUE)) != DONT_PANIC) {
if (kdi_GetErrorType(status) == ERR_NEW_TAPE) {
cqd_context->persistent_new_cart = dFALSE;
cqd_context->operation_status.new_tape = dFALSE;
status = DONT_PANIC;
} else {
return status;
}
}
} else {
return status;
}
}
if ((status = cqd_CmdRetension(cqd_context, dNULL_PTR)) != DONT_PANIC) {
return status;
}
if (cqd_context->drive_parms.seek_mode == SEEK_TIMED) {
seek_count = MAX_SEEK_COUNT_TIME;
} else {
seek_count = MAX_SEEK_COUNT_SKIP;
}
retension_flag = dTRUE;
status = DONT_PANIC;
}
if (status != DONT_PANIC) {
return status;
}
segment_proximity = (dSDWord)((cqd_context->rd_wr_op.d_segment - 1) -
cqd_context->operation_status.current_segment);
if (kdi_ReportAbortStatus(cqd_context->kdi_context) !=
NO_ABORT_PENDING) {
return kdi_Error(ERR_ABORT, FCT_ID, ERR_SEQ_1);
}
} while (!((0l <= segment_proximity) &&
(segment_proximity <= 10l)) &&
(seek_count > 0));
if ((seek_count == 0) &&
!((0l <= segment_proximity) &&
(segment_proximity <= 10l))) {
kdi_CheckedDump(
QIC117WARN,
"SeekErr - seek_count = 0\n", 0l);
return kdi_Error(ERR_SEEK_FAILED, FCT_ID, ERR_SEQ_1);
}
do {
if ((status = cqd_ReadIDRepeat(cqd_context)) != DONT_PANIC) {
return status;
}
} while (((dSDWord)(cqd_context->rd_wr_op.d_segment - 1)) >
((dSDWord)cqd_context->operation_status.current_segment));
return status;
}
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