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SubjectRe: "hde: timeout waiting for DMA": message gone, same behaviour
On Fri, Sep 21, 2001 at 04:43:04PM -0400, Greg Ward wrote:
> On 21 September 2001, Vojtech Pavlik said:
> > There were updates in 2.4.9-pre2 in the VIA driver, so it might be worth
> > trying. Also disabling CONFIG_IDEDMA_AUTO may work, but you'll get slow
> > performance.
>
> OK, I've just rebooted with CONFIG_IDEDMA_AUTO not set. Same thing
> happens; kernel prints "hde: timeout waiting for DMA" at boot time,
> "hdparm /dev/hde" reports DMA on, and "dd if=/dev/hde of=/dev/null
> count=1" takes about 20 sec to complete. (Hmmm: in previous builds,
> the kernel would turn DMA off for me after that long DMA timeout delay.
> It no longer does so. If I "hdparm -d0 /dev/hde", then there's no
> long delay on read.)
>
> > Afterwards, though, you can do hdparm -i /dev/hd*
>
> cthulhu:~# hdparm -i /dev/hde
>
> /dev/hde:
>
> Model=ST380021A, FwRev=3.05, SerialNo=3HV03HSB
> Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
> RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
> BuffType=unknown, BuffSize=2048kB, MaxMultSect=16, MultSect=16
> CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=156301488
> 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 *udma5

Looks good, drive set to UDMA100 ...

>
> > and cat /proc/ide/via
>
> OK, but the VIA controller is ide0 and ide1, which are unused -- nothing
> is connected to either one. The only IDE device in the system right now
> is the brand-new Seagate 80 GB ATA/100 drive at hde1 (on ide2, which is
> controlled by the Promise chip).

Oh, but I can't help you much with the Promise chip. I may help you get
the drive working on UDMA66 off the VIA chip, tho.

> So here's the kernel's picture of both
> the VIA and Promise controllers:
>
> cthulhu:~# cat /proc/ide/via
> ----------VIA BusMastering IDE Configuration----------------
> Driver Version: 3.23
> South Bridge: VIA vt82c686a
> Revision: ISA 0x22 IDE 0x10
> Highest DMA rate: UDMA66
> BM-DMA base: 0xd800
> PCI clock: 33MHz
> Master Read Cycle IRDY: 0ws
> Master Write Cycle IRDY: 0ws
> BM IDE Status Register Read Retry: yes
> Max DRDY Pulse Width: No limit
> -----------------------Primary IDE-------Secondary IDE------
> Read DMA FIFO flush: yes yes
> End Sector FIFO flush: no no
> Prefetch Buffer: no no
> Post Write Buffer: no no
> Enabled: yes yes
> Simplex only: no no
> Cable Type: 40w 40w
> -------------------drive0----drive1----drive2----drive3-----
> Transfer Mode: PIO PIO PIO PIO
> Address Setup: 120ns 120ns 120ns 120ns
> Cmd Active: 480ns 480ns 480ns 480ns
> Cmd Recovery: 480ns 480ns 480ns 480ns
> Data Active: 330ns 330ns 330ns 330ns
> Data Recovery: 270ns 270ns 270ns 270ns
> Cycle Time: 600ns 600ns 600ns 600ns
> Transfer Rate: 3.3MB/s 3.3MB/s 3.3MB/s 3.3MB/s

Looks OK, no drives present.

> cthulhu:~# cat /proc/ide/pdc202xx
>
> PDC20265 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 PCI Mode PCI
> FIFO Empty FIFO Empty
> --------------- drive0 --------- drive1 -------- drive0 ---------- drive1 ------
> DMA enabled: no yes no no
> DMA Mode: UDMA 4 NOTSET NOTSET NOTSET
> PIO Mode: PIO 4 NOTSET NOTSET NOTSET

Controller set to UDMA66. This may be a problem ...

Can you try 'hdparm -X68 -d1 /dev/hde'? This should enable UDMA66 on the
drive as well. This won't be top speed, but could work ...

> > which will tell us interesting information, which may
> > lead us further to solving the problem.
>
> Well, I hope it means something to you!
>
> > Btw, what clock and multiplier
> > your CPU is?
>
> 800 MHz Athlon. Not sure what the multiplier is -- I don't mess with
> that stuff.

That's OK.

> --
> Greg Ward - Unix bigot gward@python.net
> http://starship.python.net/~gward/
> The world is coming to an end. Please log off.

--
Vojtech Pavlik
SuSE Labs
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