Fab> Why not just use inline sends for the special QPs and remove
Fab> the need to perform any DMA mappings on the send side
Fab> altogether?
Not all HCAs necessarily support inline sends, so we can't use them in
core code. In fact, I don't think that even all Mellanox HCAs would
be able to handle big enough inline sends. Sending a 256-byte MAD
would require a 512-byte WQE to put the payload in inline data, and if
I recall correctly, MT25204 can't handle WQEs that big.
- R.
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