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Annotation of ntddk/src/scsi/qic117/settpst.c, revision 1.1

1.1     ! root        1: /*++
        !             2: 
        !             3: Copyright (c) 1993 - Colorado Memory Systems, Inc.
        !             4: All Rights Reserved
        !             5: 
        !             6: Module Name:
        !             7: 
        !             8:     settpst.c
        !             9: 
        !            10: Abstract:
        !            11: 
        !            12:     Calculates the number of bytes of data available on the tape (accounting
        !            13:     for bad sectors)
        !            14: 
        !            15: Revision History:
        !            16: 
        !            17: 
        !            18: 
        !            19: 
        !            20: --*/
        !            21: 
        !            22: 
        !            23: //
        !            24: // include files
        !            25: //
        !            26: 
        !            27: #include <ntddk.h>
        !            28: #include <ntddtape.h>
        !            29: #include "common.h"
        !            30: #include "q117.h"
        !            31: #include "protos.h"
        !            32: 
        !            33: 
        !            34: VOID
        !            35: q117SetTpSt(
        !            36:     PQ117_CONTEXT Context
        !            37:     )
        !            38: 
        !            39: /*++
        !            40: 
        !            41: Routine Description:
        !            42: 
        !            43:     Uses the globals CurrentOperation.EndOfUsedTape,
        !            44:     and CurrentTape.BadSectors to set the
        !            45:     Media Parameters.
        !            46: 
        !            47: Arguments:
        !            48: 
        !            49:     Context -
        !            50: 
        !            51: Return Value:
        !            52: 
        !            53:     None
        !            54: 
        !            55: --*/
        !            56: 
        !            57: {
        !            58:     ULONG numgood,numbad;
        !            59:     SEGMENT segmentIndex;
        !            60:     SEGMENT lastSegment;
        !            61:     ULONG BytesUsed;
        !            62: 
        !            63:     //
        !            64:     // If we have read to the end of the volume segment
        !            65:     //
        !            66: 
        !            67:     if (Context->CurrentOperation.EndOfUsedTape) {
        !            68: 
        !            69:         //
        !            70:         // Count the number of used sectors
        !            71:         //
        !            72: 
        !            73:         lastSegment = Context->CurrentOperation.EndOfUsedTape;
        !            74: 
        !            75:         numgood = 0;
        !            76: 
        !            77:         for (segmentIndex = 0 ; segmentIndex <= lastSegment ; ++segmentIndex) {
        !            78: 
        !            79:             numbad = q117CountBits(Context, segmentIndex, 0l);
        !            80: 
        !            81:             if (BLOCKS_PER_SEGMENT-ECC_BLOCKS_PER_SEGMENT-numbad > 0 &&
        !            82:                     segmentIndex > Context->CurrentTape.VolumeSegment) {
        !            83: 
        !            84:                 numgood += BLOCKS_PER_SEGMENT-ECC_BLOCKS_PER_SEGMENT-numbad;
        !            85: 
        !            86:             }
        !            87:         }
        !            88: 
        !            89:         BytesUsed = numgood * BYTES_PER_SECTOR;
        !            90: 
        !            91:         numgood = 0;
        !            92: 
        !            93:         lastSegment = Context->CurrentTape.LastSegment;
        !            94: 
        !            95:         for (;segmentIndex<=lastSegment;++segmentIndex) {
        !            96: 
        !            97:             numbad = q117CountBits(Context, segmentIndex, 0l);
        !            98: 
        !            99:             if (BLOCKS_PER_SEGMENT-ECC_BLOCKS_PER_SEGMENT-numbad > 0) {
        !           100: 
        !           101:                 numgood += BLOCKS_PER_SEGMENT-ECC_BLOCKS_PER_SEGMENT-numbad;
        !           102: 
        !           103:             }
        !           104:         }
        !           105: 
        !           106:         Context->CurrentTape.MediaInfo->Remaining.LowPart =
        !           107:             numgood * BYTES_PER_SECTOR;
        !           108: 
        !           109:         Context->CurrentTape.MediaInfo->Remaining.HighPart = 0;
        !           110: 
        !           111:         Context->CurrentTape.MediaInfo->Capacity.LowPart =
        !           112:             Context->CurrentTape.MediaInfo->Remaining.LowPart + BytesUsed;
        !           113: 
        !           114:         Context->CurrentTape.MediaInfo->Capacity.HighPart = 0;
        !           115:         Context->CurrentTape.MediaInfo->BlockSize = BYTES_PER_SECTOR;
        !           116:         Context->CurrentTape.MediaInfo->PartitionCount = 0;
        !           117: 
        !           118:     } else {
        !           119: 
        !           120:         CheckedDump(QIC117INFO,("q117SetTpSt: endblock not set\n"));
        !           121: 
        !           122:     }
        !           123: }

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