Subject: [PATCH 43/46] mlxsw: spectrum_buffers: Further reduce pool size on Spectrum-2

From: Petr Machata <[email-masked]>
Date: Wed, 31 Jul 2019 09:33:15 +0300

[ Upstream commit 744ad9a357280d03d567538cee7e1e457dedd481 ]

In commit e891ce1dd2a5 ("mlxsw: spectrum_buffers: Reduce pool size on
Spectrum-2"), pool size was reduced to mitigate a problem in port buffer
usage of ports split four ways. It turns out that this work around does not
solve the issue, and a further reduction is required.

Thus reduce the size of pool 0 by another 2.7 MiB, and round down to the
whole number of cells.

Fixes: e891ce1dd2a5 ("mlxsw: spectrum_buffers: Reduce pool size on Spectrum-2")
Signed-off-by: Petr Machata <[email-masked]>
Signed-off-by: Ido Schimmel <[email-masked]>
Signed-off-by: David S. Miller <[email-masked]>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
index 1537f70bc26d..888ba4300bcc 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
@@ -437,8 +437,8 @@ static const struct mlxsw_sp_sb_pr mlxsw_sp1_sb_prs[] = {
 			   MLXSW_SP1_SB_PR_CPU_SIZE, true, false),
 };
 
-#define MLXSW_SP2_SB_PR_INGRESS_SIZE	38128752
-#define MLXSW_SP2_SB_PR_EGRESS_SIZE	38128752
+#define MLXSW_SP2_SB_PR_INGRESS_SIZE	35297568
+#define MLXSW_SP2_SB_PR_EGRESS_SIZE	35297568
 #define MLXSW_SP2_SB_PR_CPU_SIZE	(256 * 1000)
 
 /* Order according to mlxsw_sp2_sb_pool_dess */
-- 
2.20.1