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Commit 78c0f98c authored by Eli Cohen's avatar Eli Cohen Committed by Roland Dreier
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IB/mlx5: Fix binary compatibility with libmlx5



Commit c1be5232 ("Fix micro UAR allocator") broke binary compatibility
between libmlx5 and mlx5_ib since it defines a different value to the number
of micro UARs per page, leading to wrong calculation in libmlx5. This patch
defines struct mlx5_ib_alloc_ucontext_req_v2 as an extension to struct
mlx5_ib_alloc_ucontext_req.  The extended size is determined in mlx5_ib_alloc_ucontext()
and in case of old library we use uuarn 0 which works fine -- this is
acheived due to create_user_qp() falling back from high to medium then to
low class where low class will return 0.  For new libraries we use the
more sophisticated allocation algorithm.

Signed-off-by: default avatarEli Cohen <eli@mellanox.com>
Reviewed-by: default avatarYann Droneaud <ydroneaud@opteya.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent 9e65dc37
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