155 lines
3.2 KiB
C
155 lines
3.2 KiB
C
/*++
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Copyright (c) 1993 - Colorado Memory Systems, Inc.
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All Rights Reserved
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Module Name:
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newtrkbk.c
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Abstract:
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These routines handle streaming during write.
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Revision History:
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--*/
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#include <ntddk.h>
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#include <ntddtape.h>
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#include "common.h"
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#include "q117.h"
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#include "protos.h"
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#define FCT_ID 0x010f
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dStatus
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q117NewTrkBk(
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PQ117_CONTEXT Context
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)
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/*++
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Routine Description:
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This routine queues up the current buffer, and then
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waits for an empty queue to continue operations.
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Arguments:
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Context - Context of the current operation.
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Return Value:
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--*/
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{
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dStatus ret;
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BOOLEAN mapBad;
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USHORT remainder;
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PIO_REQUEST ioreq;
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ret = 0;
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do {
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//
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// do we need to go to a new tape (EndBack will write out current
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// data segment)
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//
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if (Context->CurrentOperation.CurrentSegment ==
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Context->CurrentOperation.LastSegment) {
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ret = ERROR_ENCODE(ERR_TAPE_FULL,FCT_ID,1);
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} else {
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//
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// write current data segment out
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//
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if (ret=q117IssIOReq(
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(PVOID)NULL,
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CMD_WRITE,
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(LONG)Context->CurrentOperation.CurrentSegment *
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BLOCKS_PER_SEGMENT,
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NULL,
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Context)) {
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return(ret);
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}
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//
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// increment current block information
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//
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++Context->CurrentOperation.CurrentSegment;
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}
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//
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// if the queue is full we need to empty one out
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//
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mapBad = FALSE;
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if (q117QueueFull(Context)) {
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ioreq = q117Dequeue(WaitForItem,Context);
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if (ioreq->x.adi_hdr.status && ERROR_DECODE(ioreq->x.adi_hdr.status) != ERR_BAD_BLOCK_DETECTED) {
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return(ioreq->x.adi_hdr.status);
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}
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if (ioreq->x.ioDeviceIO.crc || ERROR_DECODE(ioreq->x.adi_hdr.status) == ERR_BAD_BLOCK_DETECTED ) {
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if (ret = q117MapBadBlock(
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ioreq,
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&Context->CurrentOperation.SegmentPointer,
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&Context->CurrentOperation.SegmentBytesRemaining,
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&Context->CurrentOperation.CurrentSegment,
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&remainder,
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Context)) {
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return(ret);
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}
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mapBad = TRUE;
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}
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}
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if (!mapBad) {
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Context->CurrentOperation.SegmentPointer =
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q117GetFreeBuffer(NULL,Context);
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//
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// We need to skip segments with no data area (less than
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// 4 good segments)
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//
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while ((Context->CurrentOperation.SegmentBytesRemaining =
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q117GoodDataBytes(
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Context->CurrentOperation.CurrentSegment,Context)
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) <= 0) {
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++Context->CurrentOperation.CurrentSegment;
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}
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}
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//
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// CurrentOperation.SegmentBytesRemaining should only be zero
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// if we mapped out some sectors
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//
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} while (Context->CurrentOperation.SegmentBytesRemaining == 0);
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return(ret);
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}
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