RDMA/qedr: Add EDPM max size to alloc ucontext response

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User space should receive the maximum edpm size from kernel driver,
similar to other edpm/ldpm related limits.  Add an additional parameter to
the alloc_ucontext_resp structure for the edpm maximum size.

In addition, pass an indication from user-space to kernel
(and not just kernel to user) that the DPM sizes are supported.

This is for supporting backward-forward compatibility between driver and
lib for everything related to DPM transaction and limit sizes.

This should have been part of commit mentioned in Fixes tag.

Link: https://lore.kernel.org/r/20200707063100.3811-3-michal.kalderon@marvell.com
Fixes: 93a3d05f9d ("RDMA/qedr: Add kernel capability flags for dpm enabled mode")
Signed-off-by: Ariel Elior <ariel.elior@marvell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@marvell.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

...

This commit is contained in:

Michal Kalderon 2020-07-07 09:31:00 +03:00 • committed by Jason Gunthorpe

parent bbe4f42452

commit eb7f84e379

2 changed files with 11 additions and 4 deletions

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6

include/uapi/rdma/qedr-abi.h

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