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