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SubjectRe: Promise 20267 "working" but no UDMA
On Sun, 1 Apr 2001, Andrew Chan wrote:

> Anybody manage to get UDMA 66/100 working with an on-board Promise 20267
> chip?
>
> Hardware: Tyan Tiger LE (with ServerWorks OSB4 _and_ Promise 20267 on-board)
>
> Kernel: 2.4.3 with ide.2.4.3-p8.all.03242001.patch by Andre Hedrick (or
> stock 2.4.3 with more or less same results)
>
> FastTrack config: only 1 drive, configured as a SPAN volume consisting of 1
> drive

No RAIDing allowed in the FTTK Bios.

> I don't quite care about the Promise RAID features. I will use Linux
> software RAID. The problem is that I cannot seem to be able to get the
> controller into UDMA 4 (66 Mhz) mode!
>
> I have enabled all the relevant DMA related kernel options. I have also
> checked using the Seagate disk utility to make sure that the drive is
> recognized (and configured) as UDMA 66 capable.
>
> The following is from dmesg:
>
> PCI: Found IRQ 10 for device 00:03.0
> PDC20267: chipset revision 2
> PDC20267: not 100% native mode: will probe irqs later
> PDC20267: ROM enabled at 0xfeae0000
> PDC20267: (U)DMA Burst Bit ENABLED Primary MASTER Mode Secondary MASTER Mode.

This is a RAID mode BIOS and that is specified to disable under linux
unless a 0x55AA valid signature is present

> PDC20267: neither IDE port enabled (BIOS)

And it does!

> I wonder what the last line meant by saying neither port is enabled?
>
> # /sbin/hdparm -Tt /dev/hde
>
> /dev/hde:
> Timing buffer-cache reads: 128 MB in 0.74 seconds =172.97 MB/sec
> Timing buffered disk reads: 64 MB in 12.82 seconds = 4.99 MB/sec [should
> be much much faster here]
>
> # cat /proc/ide/pdc202xx
>
> PDC20267 Chipset.
> ------------------------------- General
> Status ---------------------------------
> Burst Mode : enabled
> Host Mode : Normal
> Bus Clocking : 33 PCI Internal
> IO pad select : 10 mA
> Status Polling Period : 0
> Interrupt Check Status Polling Delay : 0
> --------------- Primary Channel ---------------- Secondary
> Channel -------------
> enabled enabled
> 66 Clocking enabled disabled
> Mode MASTER Mode MASTER
> FIFO Empty FIFO Empty
> --------------- drive0 --------- drive1 -------- drive0 ----------
> drive1 ------
> DMA enabled: no no yes no
> DMA Mode: UDMA 4 NOTSET NOTSET NOTSET
> PIO Mode: PIO 4 NOTSET NOTSET NOTSET
>
> # hdparm -d1 /dev/hde
>
> /dev/hde:
> setting using_dma to 1 (on)
> HDIO_SET_DMA failed: Operation not permitted
> using_dma = 0 (off)
>
> # hdparm -X68 /dev/hde
>
> [resulted in the following message in /var/log/messages]
>
> Apr 1 19:03:21 promise kernel: ide2: Speed warnings UDMA 3/4/5 is not
> functional.
>
> # hdparm -i /dev/hde
>
> /dev/hde:
>
> Model=ST36421A, FwRev=6.01, SerialNo=5BE064AN
> Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
> RawCHS=13330/15/63, TrkSize=0, SectSize=0, ECCbytes=4
> BuffType=unknown, BuffSize=256kB, MaxMultSect=16, MultSect=off
> CurCHS=13330/15/63, CurSects=913440960, LBA=yes, LBAsects=12596850
> 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 udma0 udma1 udma2 udma3 *udma4
^^^^^^ ^^^^^^

You have not enable the chipset code properly

Andre Hedrick
Linux ATA Development
ASL Kernel Development
-----------------------------------------------------------------------------
ASL, Inc. Toll free: 1-877-ASL-3535
1757 Houret Court Fax: 1-408-941-2071
Milpitas, CA 95035 Web: www.aslab.com

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