[ofa-general] ***SPAM*** rdma write to pci address

Tzahi Oved tzahio at voltaire.com
Tue Jan 6 08:42:22 PST 2009


Adding a correction: the RDMA operation returns with cq.status 10
(rem access err).

On Tue, Jan 6, 2009 at 6:34 PM, Tzahi Oved <tzahio at voltaire.com> wrote:

>  Hi,
> I'm trying to RDMA write from one server directly to a pci bar address in a
> remote server.
> I'm using ConnectX HCA with OFED 1.4 on a DL160 platform.
> Basically I'm using the following calls:
> ib_get_dma_mr() - get a general mr for physical bus memory space
> dma_map_single()  - map my ioremap()ed kernel virtual address of the io
> device to the HCA bus address space
> Then with mr->rkey and the bus address I'm trying to rdma write from a
> remote server.
> The RDMA operation returns with cq.status 10 (rem op err).
> Any ideas why it fails? should I take a different approach?
> Many thanks,
> Tzahi
>
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