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net/mlx5e: Add outbound PCI buffer overflow counter

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Add outbound_pci_buffer_overflow to ethtool output for monitoring the
number of packets that were dropped due to lack of PCIe buffers on
receive path from NIC port toward the host(s).

This counter is valid only in case that tx_overflow_buffer_pkt is
supported in MCAM enhanced features.

Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Eran Ben Elisha
2017-05-12 02:47:02 +03:00
committed by Saeed Mahameed
parent 068aef33be
commit efae7f78c4
3 changed files with 28 additions and 4 deletions
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6
include/linux/mlx5/mlx5_ifc.h
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@@ -1864,7 +1864,9 @@ struct mlx5_ifc_pcie_perf_cntrs_grp_data_layout_bits {
u8 crc_error_tlp[0x20];
u8 reserved_at_140[0x40];
u8 tx_overflow_buffer_pkt_high[0x20];
u8 tx_overflow_buffer_pkt_low[0x20];
u8 outbound_stalled_reads[0x20];
@@ -7767,7 +7769,7 @@ struct mlx5_ifc_pcam_reg_bits {
struct mlx5_ifc_mcam_enhanced_features_bits {
u8 reserved_at_0[0x7b];
u8 pcie_outbound_stalled[0x1];
u8 reserved_at_7c[0x1];
u8 tx_overflow_buffer_pkt[0x1];
u8 mtpps_enh_out_per_adj[0x1];
u8 mtpps_fs[0x1];
u8 pcie_performance_group[0x1];