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net/mlx5: SD, prefer sd_group_size from vport context

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Newer FW reports the SD group size directly in the NIC vport context
via the sd_group_size field, gated by the sd_group_size capability.
Switch sd_init() to source the group size from there and fall back to
the MPIR-based host_buses query only when the cap is absent.
sd_group_size might return 1 in some FW configuration. Add explicit
check to disable SD creation in this case.

While here, rename host_buses to group_size throughout sd.c to follow
the new name on capable FW.

Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260810093037.3138197-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Shay Drory 2026-08-10 12:30:37 +03:00 • committed by Jakub Kicinski
commit 486e5419b7
4 changed files with 47 additions and 38 deletions
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