sumeet gandhare wrote:
Hi,
I am new to OFED stack and wish to understand the design from the
source code. I have read the chapter 3 of IBA spec from OpenFabrics
and understand the concept of Queue Pair, Completion Queue, work
request, consumer, LID, GUID. Basically in IB, the consumer process
enqueues the work request to the send queue pair which specifies the
virtual address of the message to be sent and destination LID and QPN.
The receiving consumer enqueues work elements to receive queue
specifying the virtual address of the message being received. On
arrival of the message , the completion queue contains a CQE
notification to the client. So hardware basically is a DMA engine
which transfer the message from source virtual address to desitnation
virtual address. I wish to understand how this part better.
Please could you suggest entry points in the stack like verbs and the
interaction with device driver like iPath and Mlx.. What all files I
should look at and in what sequence to better understand the
programming model and its implementation to send and receive the IB
packets on the wire?
I suggest you look at examples under libibverbs directory, for writing
verbs applications
As for the drivers they are located under drivers/infiniband/hw/
Tziporet
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