[openib-general] Question on get_dma_mr()

[Roland Dreier]

    Devesh> S/G entry ?

scatter gather entry

    Devesh> What is the size of this region ? is there any limitation
    Devesh> in providing this size?

It must be large enough to cover all DMA (bus) addresses for the device.

    Devesh> Finally you mean to say in the implementation of this
    Devesh> function providing a unique L_Key and R_Key is
    Devesh> sufficient. Is it?

I can't really understand this question.  Of course keys must be
unique -- if two regions had the same key, then there would be no way
for the HCA to know which one to use.

 - R.