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RDMA/mlx5: Align mkc page size capability check to PRM

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Align the capabilities checked when using the log_page_size 6th bit in the
mkey context to the PRM definition. The upper and lower bounds are set by
max/min caps, and modification of the 6th bit by UMR is allowed only when
a specific UMR cap is set.
Current implementation falsely assumes all page sizes up-to 2^63 are
supported when the UMR cap is set. In case the upper bound cap is lower
than 63, this might result a FW syndrome on mkey creation, e.g:
mlx5_core 0000:c1:00.0: mlx5_cmd_out_err:832:(pid 0): CREATE_MKEY(0×200) op_mod(0×0) failed, status bad parameter(0×3), syndrome (0×38a711), err(-22)

Previous cap enforcement is still correct for all current HW, FW and
driver combinations. However, this patch aligns the code to be PRM
compliant in the general case.

Signed-off-by: Michael Guralnik <michaelgur@nvidia.com>
Link: https://patch.msgid.link/eab4eeb4785105a4bb5eb362dc0b3662cd840412.1751979184.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Michael Guralnik 2025-07-09 09:42:10 +03:00 • committed by Leon Romanovsky
commit fcfb03597b
2 changed files with 52 additions and 9 deletions
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