Trying to get DMA working with IDE alim15x3 controller

[Peter]

This is on the ALim15x3 with the 2.5.69 kernel on a vpr matrix 200a5 
laptop -- I just did this to get DMA5:

    *  set ide0=ata66 in lilo to get the 100MHz bus and DMA5
    *  add "hdparm -c 1 -m 16 -S 242 -k 1 /dev/hda" to /etc/init.d/bootmisc.sh

Nice results:

hda: 78140160 sectors (40008 MB) w/1768KiB Cache, CHS=77520/16/63, UDMA(100)

# hdparm -i /dev/hda

    /dev/hda:

     Model=IC25N040ATCS04-0, FwRev=CA4OA71A, SerialNo=CSH405DCLW5UVB
     Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
     RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
     BuffType=DualPortCache, BuffSize=1768kB, MaxMultSect=16, MultSect=16
     CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=78140160
     IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
     PIO modes:  pio0 pio1 pio2 pio3 pio4
     DMA modes:  mdma0 mdma1 mdma2
     UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
     AdvancedPM=yes: mode=0x80 (128) WriteCache=enabled
     Drive conforms to: ATA/ATAPI-5 T13 1321D revision 3:  2 3 4 5

# hdparm -tT /dev/hda

    /dev/hda:
     Timing buffer-cache reads:   128 MB in  0.45 seconds =283.23 MB/sec
     Timing buffered disk reads:  64 MB in  3.23 seconds = 19.79 MB/sec

# hdparm /dev/hda

    /dev/hda:
     multcount    = 16 (on)
     IO_support   =  1 (32-bit)
     unmaskirq    =  0 (off)
     using_dma    =  1 (on)
     keepsettings =  1 (on)
     readonly     =  0 (off)
     readahead    = 256 (on)
     geometry     = 11984/16/63, sectors = 78140160, start = 0

Cheers,
Peter