From: Petr Machata petrm@mellanox.com
Due to an issue on Spectrum-2, in front-panel ports split four ways, 2 out of 32 port buffers cannot be used. To work around this, the next FW release will mark them as unused, and will report correspondingly lower total shared buffer size. mlxsw will pick up the new value through a query to cap_total_buffer_size resource. However the initial size for shared buffer pool 0 is hard-coded and therefore needs to be updated.
Thus reduce the pool size by 2.7 MiB (which corresponds to 2/32 of the total size of 42 MiB), and round down to the whole number of cells.
Fixes: fe099bf682ab ("mlxsw: spectrum_buffers: Add Spectrum-2 shared buffer configuration") Signed-off-by: Petr Machata petrm@mellanox.com Acked-by: Jiri Pirko jiri@mellanox.com Signed-off-by: Ido Schimmel idosch@mellanox.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c @@ -411,9 +411,9 @@ static const struct mlxsw_sp_sb_pr mlxsw MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, MLXSW_SP_SB_INFI), };
-#define MLXSW_SP2_SB_PR_INGRESS_SIZE 40960000 +#define MLXSW_SP2_SB_PR_INGRESS_SIZE 38128752 +#define MLXSW_SP2_SB_PR_EGRESS_SIZE 38128752 #define MLXSW_SP2_SB_PR_INGRESS_MNG_SIZE (200 * 1000) -#define MLXSW_SP2_SB_PR_EGRESS_SIZE 40960000
static const struct mlxsw_sp_sb_pr mlxsw_sp2_sb_prs[] = { /* Ingress pools. */