[PATCH net 2/3] net/mlx5e: Validate bandwidth for non-ETS traffic classes
From: Tariq Toukan <tariqt@nvidia.com>
Date: 2026-06-22 11:30:24
Also in:
linux-rdma, lkml
Subsystem:
mellanox ethernet driver (mlx5e), mellanox mlx5 core vpi driver, networking drivers, the rest · Maintainers:
Saeed Mahameed, Tariq Toukan, Mark Bloch, Leon Romanovsky, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Alexei Lazar <redacted>
The IEEE 802.1Qaz standard defines that bandwidth allocation percentages
only apply to ETS traffic classes.
Reject ETS configurations that specify non-zero bandwidth for traffic
classes.
Fixes: 08fb1dacdd76 ("net/mlx5e: Support DCBNL IEEE ETS")
Signed-off-by: Alexei Lazar <redacted>
Reviewed-by: Carolina Jubran <redacted>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
index 762f0a46c120..e4161603cdc0 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c@@ -324,6 +324,17 @@ static int mlx5e_dbcnl_validate_ets(struct net_device *netdev, } } + /* Validate Non ETS BW */ + for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) { + if (ets->tc_tsa[i] != IEEE_8021QAZ_TSA_ETS && + ets->tc_tx_bw[i]) { + netdev_err(netdev, + "Failed to validate ETS: tc=%d BW is not 0 for non-ETS TC (tsa=%u, bw=%u)\n", + i, ets->tc_tsa[i], ets->tc_tx_bw[i]); + return -EINVAL; + } + } + /* Validate Bandwidth Sum */ for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) { if (ets->tc_tsa[i] == IEEE_8021QAZ_TSA_ETS) {
--
2.44.0