dma pcix serverworks GC-LE

[Guest]

Archived from groups: comp.sys.hp.hardware (More info?)

Hello,
I have developed a fully PCIX compliant card which performs a DMA into
the systems memory (64bit/133Mhz). The PCIX controller on my card is a
Xilinx PCIX core, running on a Virtex2P FPGA. I use the PCI command
x"07" to write burst of 4Kb. The OS is Linux Redhat 2.4.26. The DMA
works properly on a PC with Intel E7505 chipset. But actually I want to
use a HP Prolinat DL380 system with serverworks chipset.
If I want to do the DMA there the system hangs up. ONLY if the burst
size is reduced to 1Kb, than it works with several systems warnings like
"dazed and confused...probably you have a problem with your RAM chips"
and the first 64bit word is always wrong.
Because the DMA runs properly on the PC with Intel chipset I think there
is a problem with the serverworks chipset and the 4Kb-DMA. Does anyone
know the problem?
Thank you, Matthias

 

[Guest]

Archived from groups: comp.sys.hp.hardware (More info?)

It is unlikely that anyone reading this newsgroup can answer your question.
There are other newsgroups which are more oriented toward hardware problem
solving and/or Linux. Possibly you can obtain the specifications for the E7505
and Serverworks chipsets, and compare them? Or contact the engineers who
designed the Serverworks chipset? ... Ben Myers

On Tue, 18 May 2004 11:59:04 +0200, Matthias =?iso-8859-1?Q?M=FCller?=
<mur@iis.fhg.de> wrote:

>Hello,
>I have developed a fully PCIX compliant card which performs a DMA into
>the systems memory (64bit/133Mhz). The PCIX controller on my card is a
>Xilinx PCIX core, running on a Virtex2P FPGA. I use the PCI command
>x"07" to write burst of 4Kb. The OS is Linux Redhat 2.4.26. The DMA
>works properly on a PC with Intel E7505 chipset. But actually I want to
>use a HP Prolinat DL380 system with serverworks chipset.
>If I want to do the DMA there the system hangs up. ONLY if the burst
>size is reduced to 1Kb, than it works with several systems warnings like
>"dazed and confused...probably you have a problem with your RAM chips"
>and the first 64bit word is always wrong.
>Because the DMA runs properly on the PC with Intel chipset I think there
>is a problem with the serverworks chipset and the 4Kb-DMA. Does anyone
>know the problem?
>Thank you, Matthias
>
>