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* DMA problem
@ 2004-01-16 19:24 claude parisot
  2004-01-16 19:32 ` Andreas Unterkircher
  0 siblings, 1 reply; 9+ messages in thread
From: claude parisot @ 2004-01-16 19:24 UTC (permalink / raw)
  To: linux-kernel; +Cc: Claude.PARISOT

  Hello !

Sorry to post a seconfd message on the list, I am only trying
to get an answern for this - it seems so - DMA-problem ??


I have some
problems with a brand new Plextor-drive, PX-W5224TA/T3B, I cannot
mount any CD or burn a CDR or CD-RW, except if I disable DMA with
following command :# hdparm -d0 /dev/hdd , a little bit annoying,
isn't it ?

If I insert a cdrom in the drive the led doesn't go out, it flashes
as usual but it stays green.

It seems to be a DMA-problem or a kernel-bug ???
Its only a supposition, I am a Linux-newbie, and I am looking
for an explanation and a solution ....

By mounting a cdrom I get following error messages :

Jan 11 20:46:00 ishwara kernel: scsi : aborting command due to timeout
: pid 102, scsi0, channel 0, id 1, lun 0 0x28 00 00 00 00 10 00 00 01 00
Jan 11 20:46:00 ishwara kernel: hdd: error waiting for DMA
Jan 11 20:46:00 ishwara kernel: hdd: dma timeout retry: status=0x7f {
DriveReady DeviceFault SeekComplete DataRequest CorrectedError Index
Error } Jan 11 20:46:00 ishwara kernel: hdd: dma timeout retry:
error=0x7f Jan 11 20:46:00 ishwara kernel: hdd: DMA disabled
Jan 11 20:46:00 ishwara kernel: hdd: ATAPI reset complete
Jan 11 20:46:00 ishwara kernel: hdd: irq timeout: status=0x80 { Busy }
Jan 11 20:46:00 ishwara kernel: hdd: ATAPI reset complete
Jan 11 20:46:00 ishwara kernel: hdd: irq timeout: status=0x80 { Busy }
Jan 11 20:46:00 ishwara kernel: hdd: ATAPI reset complete
Jan 11 20:46:07 ishwara kernel: hdd: irq timeout: status=0x80 { Busy }
Jan 11 20:46:07 ishwara kernel: scsi0 channel 0 : resetting for second
half of retries. Jan 11 20:46:07 ishwara kernel: SCSI bus is being reset
for host 0 channel 0. Jan 11 20:46:07 ishwara kernel: hdd: status
timeout: status=0x80 { Busy } Jan 11 20:46:07 ishwara kernel: hdd: drive
not ready for command Jan 11 20:46:07 ishwara kernel: hdd: ATAPI reset
complete Jan 11 20:46:32 ishwara kernel: scsi : aborting command due to
timeout : pid 103, scsi0, channel 0, id 1, lun 0 0x28 00 00 00 00 10 00
rive not ready for command

And then I have a freeze or at least a blocking of the sysem.
I have to reboot.

Could someone give me an explanation of what is happening and a way to
solve the problem .... is this a kernel-bug ? Or an incompatibility
between the motherboard and the drive ??

If you choose to help me, please don't be to esoteric, as I already
said, I am a newbie.

Please, could you Cc all answers to the adress :

Claude.PARISOT@wanadoo.fr

My apologizes for my english ....


Claude

System : Pentium 2,8C
Asus P4P800 DeLuxe
Intel I865PE














^ permalink raw reply	[flat|nested] 9+ messages in thread
* Re: DMA problem
@ 2004-01-16 20:45 DOSProfi
  0 siblings, 0 replies; 9+ messages in thread
From: DOSProfi @ 2004-01-16 20:45 UTC (permalink / raw)
  To: linux-kernel

There are many reasons for this Problem. Which Kernel Version are you running
(uname -a). Which distribution? SuSE, Debian, Mandrake, RedHat?

On Friday 16 January 2004 20:24, claude parisot wrote:
>   Hello !
>
> Sorry to post a seconfd message on the list, I am only trying
> to get an answern for this - it seems so - DMA-problem ??
>
>
> I have some
> problems with a brand new Plextor-drive, PX-W5224TA/T3B, I cannot
> mount any CD or burn a CDR or CD-RW, except if I disable DMA with
> following command :# hdparm -d0 /dev/hdd , a little bit annoying,
> isn't it ?
>
> If I insert a cdrom in the drive the led doesn't go out, it flashes
> as usual but it stays green.
>
> It seems to be a DMA-problem or a kernel-bug ???
> Its only a supposition, I am a Linux-newbie, and I am looking
> for an explanation and a solution ....
>
> By mounting a cdrom I get following error messages :
>
> Jan 11 20:46:00 ishwara kernel: scsi : aborting command due to timeout
>
> : pid 102, scsi0, channel 0, id 1, lun 0 0x28 00 00 00 00 10 00 00 01 00
>
> Jan 11 20:46:00 ishwara kernel: hdd: error waiting for DMA
> Jan 11 20:46:00 ishwara kernel: hdd: dma timeout retry: status=0x7f {
> DriveReady DeviceFault SeekComplete DataRequest CorrectedError Index
> Error } Jan 11 20:46:00 ishwara kernel: hdd: dma timeout retry:
> error=0x7f Jan 11 20:46:00 ishwara kernel: hdd: DMA disabled
> Jan 11 20:46:00 ishwara kernel: hdd: ATAPI reset complete
> Jan 11 20:46:00 ishwara kernel: hdd: irq timeout: status=0x80 { Busy }
> Jan 11 20:46:00 ishwara kernel: hdd: ATAPI reset complete
> Jan 11 20:46:00 ishwara kernel: hdd: irq timeout: status=0x80 { Busy }
> Jan 11 20:46:00 ishwara kernel: hdd: ATAPI reset complete
> Jan 11 20:46:07 ishwara kernel: hdd: irq timeout: status=0x80 { Busy }
> Jan 11 20:46:07 ishwara kernel: scsi0 channel 0 : resetting for second
> half of retries. Jan 11 20:46:07 ishwara kernel: SCSI bus is being reset
> for host 0 channel 0. Jan 11 20:46:07 ishwara kernel: hdd: status
> timeout: status=0x80 { Busy } Jan 11 20:46:07 ishwara kernel: hdd: drive
> not ready for command Jan 11 20:46:07 ishwara kernel: hdd: ATAPI reset
> complete Jan 11 20:46:32 ishwara kernel: scsi : aborting command due to
> timeout : pid 103, scsi0, channel 0, id 1, lun 0 0x28 00 00 00 00 10 00
> rive not ready for command
>
> And then I have a freeze or at least a blocking of the sysem.
> I have to reboot.
>
> Could someone give me an explanation of what is happening and a way to
> solve the problem .... is this a kernel-bug ? Or an incompatibility
> between the motherboard and the drive ??
>
> If you choose to help me, please don't be to esoteric, as I already
> said, I am a newbie.
>
> Please, could you Cc all answers to the adress :
>
> Claude.PARISOT@wanadoo.fr
>
> My apologizes for my english ....
>
>
> Claude
>
> System : Pentium 2,8C
> Asus P4P800 DeLuxe
> Intel I865PE
>
>
>
>
>
>
>
>
>
>
>
>
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/


^ permalink raw reply	[flat|nested] 9+ messages in thread
* DMA Problem
@ 2005-04-20 17:37 Sanjay Bajaj
  0 siblings, 0 replies; 9+ messages in thread
From: Sanjay Bajaj @ 2005-04-20 17:37 UTC (permalink / raw)
  To: linuxppc-embedded

I am having a setup issue with the DMA channel 0 with the DMA Controller 
on PPC440GX. The code I wrote is:

#if defined(CONFIG_PPC4xx_DMA)
    /* Setup the DMA */
    DPRINTK("PPC4xx pwidth: %d\n", ppc4xx_get_peripheral_width(DMA_CH0));
    ppc4xx_set_dma_mode(DMA_CH0, DMA_MODE_READ);
    ppc4xx_set_src_addr(DMA_CH0, (phys_addr_t)(pdev->x2mem_phys_addr + 
src_addr));
    ppc4xx_set_dst_addr(DMA_CH0, (phys_addr_t)dst_addr);
    ppc4xx_set_dma_count(DMA_CH0, count);
    ppc4xx_enable_dma(DMA_CH0);
    DPRINTK("PPC4xx DMA Status: %d\n", ppc4xx_get_dma_status());
#endif

The DMA never completes and leaves a residue of 'count'. What am I missing?

Please Help.
Sanjay

^ permalink raw reply	[flat|nested] 9+ messages in thread
end of thread, other threads:[~2005-04-20 17:38 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2004-01-16 19:24 DMA problem claude parisot
2004-01-16 19:32 ` Andreas Unterkircher
2004-01-16 19:42   ` claude parisot
2004-01-16 21:03     ` DOSProfi
2004-01-16 20:18       ` claude parisot
2004-01-16 19:50   ` Wes Janzen
2004-01-16 20:03     ` claude parisot
  -- strict thread matches above, loose matches on Subject: below --
2004-01-16 20:45 DOSProfi
2005-04-20 17:37 DMA Problem Sanjay Bajaj

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