net/mlx5e: SHAMPO, Make reserved size independent of page size

[ Upstream commit fab05835 ]

When hw-gro is enabled, the maximum number of header entries that are
needed per wqe (hd_per_wqe) is calculated based on the size of the
reservations among other parameters.

Miscalculation of the size of reservations leads to incorrect
calculation of hd_per_wqe as 0, particularly in the case of large page
size like in aarch64, this prevents the SHAMPO header from being
correctly initialized in the device, ultimately causing the following
cqe err that indicates a violation of PD.

 mlx5_core 0000:00:08.0 eth2: ERR CQE on RQ: 0x1180
 mlx5_core 0000:00:08.0 eth2: Error cqe on cqn 0x510, ci 0x0, qn 0x1180, opcode 0xe, syndrome  0x4, vendor syndrome 0x32
 00000000: 00 00 00 00 04 4a 00 00 00 00 00 00 20 00 93 32
 00000010: 55 00 00 00 fb cc 00 00 00 00 00 00 07 18 00 00
 00000020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 4a
 00000030: 00 00 00 9a 93 00 32 04 00 00 00 00 00 00 da e1

Use the correct formula for calculating the size of reservations,
precisely it shouldn't be dependent on page size, instead use the
correct multiply of MLX5E_SHAMPO_WQ_BASE_RESRV_SIZE.

Fixes: e5ca8fb0 ("net/mlx5e: Add control path for SHAMPO feature")
Signed-off-by: Lama Kayal <lkayal@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1742732906-166564-1-git-send-email-tariqt@nvidia.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>