RDMA/mana_ib: return PD number to the user

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Implement returning to userspace applications PDNs of created PDs.
The PDN is used by applications that build work requests outside of the
rdma-core code base. The PDN is used to build work requests that require
mentioning the PD. The HW still ensures PD isolation using PDN attached
to MRs and WRs, therefore the PDN mentioned in the work request must match
the PDN of the used work queue. The work requests can fit only 16 bit PDNs.
Allow users to request short PDNs which are 16 bits.

The capability to request short PDN and get PDN is encoded in the response
of alloc user context IOCTL.

Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com>
Link: https://patch.msgid.link/20260717200839.495327-1-kotaranov@linux.microsoft.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

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Konstantin Taranov 2026-07-17 13:08:39 -07:00 • committed by Leon Romanovsky

parent 652befcba9

commit 1773ca1a89

3 changed files with 69 additions and 21 deletions

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62

drivers/infiniband/hw/mana/main.c

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6

include/net/mana/gdma.h

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22

include/uapi/rdma/mana-abi.h

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