John
On 10/19/06, Todd Foggoa <[EMAIL PROTECTED]
> wrote:
Hi Folks,
I seem to be plagued with these DMA errors almost every time I try to
record something now. These errors are happening on the latest ivtv
driver 0.7.1
The errors look like the following:
ivtv0 warning: ENC: (0) DMA Error 0x0000000b 00020001
ivtv0 warning: offset 8 -> 128
ivtv0 warning: offset 128 -> 120
ivtv0 warning: ENC: REG_DMAXFER 2 wait failed
ivtv0 warning: ENC: (0) DMA Error 0x00000001 00000001
My Setup is:
Linux dawg 2.6.17-gentoo-r8 #4 PREEMPT Tue Oct 3 06:48:59 EDT 2006
x86_64 AMD Athlon(tm) 64 Processor 3000+ GNU/Linux
I am running on an ASUS AV8 Deluxe motherboard with 4 ide hard drives
setup in raid5 with LVM configured on the raid array. I have an extra
IDE controller card and 2 hauppage 250 cards and am using MythTV.
I've read alot about people thinking these are due to cpu frequency
changes or opengl related. However, I don't believe it is due to
either of these. I can easily reproduce these DMA errors without
MythTV and without cpu frequency scaling. To reproduce I cat both
tuners to files on my lvm/raid5 array and then have another computer
cat some large files to /dev/null via NFS.
I'm thinking this must have something to due the amount of interrupts
happening as in my test case above has interrupts going off for the
network card, the HD access (for all 4 drives) and the two tuner
cards. Do we know if the ivtv driver is spending a lot of time at
interrupt level? Anyone have any comments about this?
I've setup a page on the ivtvdriver.org wiki for this so hopefully we
can get some more information to narrow down this problem. I've also
updated it with information from others posts:
http://ivtvdriver.org/index.php/DMA
If there is any testing /debugging I can do on my setup I'm more than
happy to help out.
And my ivtv dmesg output is below.
Thanks,
-Todd
ivtv: ==================== START INIT IVTV ====================
ivtv: version 0.7.1 (tagged release) loading
ivtv: Linux version: 2.6.17-gentoo-r8 preempt mod_unload gcc-3.4
ivtv: In case of problems please include the debug info between
ivtv: the START INIT IVTV and END INIT IVTV lines, along with
ivtv: any module options, when mailing the ivtv-users mailinglist.
ivtv0: Autodetected Hauppauge WinTV PVR-250 card (cx23415 based)
tuner 0-0061: chip found @ 0xc2 (ivtv i2c driver #0)
saa7115 0-0021: saa7115 found @ 0x42 (ivtv i2c driver #0)
msp3400 0-0040: MSP4448G-A2 found @ 0x80 (ivtv i2c driver #0)
ivtv0: loaded v4l-cx2341x-enc.fw firmware (262144 bytes)
ivtv0: loaded v4l-cx2341x-dec.fw firmware (262144 bytes)
ivtv0: Encoder revision: 0x02050032
ivtv0: Decoder revision: 0x02020023
ivtv0: Allocate DMA encoder MPEG stream: 128 x 32768 buffers (4096KB total)
ivtv0: Allocate DMA encoder YUV stream: 194 x 10800 buffers (2048KB total)
ivtv0: Allocate DMA encoder VBI stream: 120 x 17472 buffers (2048KB total)
ivtv0: Allocate DMA encoder PCM audio stream: 455 x 4608 buffers (2048KB total)
ivtv0: Initialized Hauppauge WinTV PVR-250, card #0
ivtv: ====================== NEXT CARD ======================
ivtv1: Autodetected Hauppauge WinTV PVR-250 card (cx23416 based)
tuner 1-0061: chip found @ 0xc2 (ivtv i2c driver #1)
saa7115 1-0021: saa7115 found @ 0x42 (ivtv i2c driver #1)
msp3400 1-0040: MSP4448G-A2 found @ 0x80 (ivtv i2c driver #1)
ivtv1: loaded v4l-cx2341x-enc.fw firmware (262144 bytes)
ivtv1: Encoder revision: 0x02050032
ivtv1: Allocate DMA encoder MPEG stream: 128 x 32768 buffers (4096KB total)
ivtv1: Allocate DMA encoder YUV stream: 194 x 10800 buffers (2048KB total)
ivtv1: Allocate DMA encoder VBI stream: 120 x 17472 buffers (2048KB total)
ivtv1: Allocate DMA encoder PCM audio stream: 455 x 4608 buffers (2048KB total)
ivtv1: Create encoder radio stream
ivtv1: Initialized Hauppauge WinTV PVR-250, card #1
ivtv: ==================== END INIT IVTV ====================
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--
John M. Drescher
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