[PATCH net-next 0/5] net/mlx5e: Add support for PCIe congestion events

[Mark Bloch <mbloch@nvidia.com>]

PCIe congestion events are events generated by the firmware when the
device side has sustained PCIe inbound or outbound traffic above
certain thresholds. The high and low threshold are hysteresis thresholds
to prevent flapping: once the high threshold has been reached, a low
threshold event will be triggered only after the bandwidth usage went
below the low threshold.

This series adds support for receiving and exposing such events as
ethtool counters.

2 new pairs of counters are exposed: pci_bw_in/outbound_high/low. These
should help the user understand if the device PCI is under pressure.
The thresholds are configurable via sysfs.

Dragos Tatulea (5):
  net/mlx5: Small refactor for general object capabilities
  net/mlx5: Add IFC bits for PCIe Congestion Event object
  net/mlx5e: Create/destroy PCIe Congestion Event object
  net/mlx5e: Add device PCIe congestion ethtool stats
  net/mlx5e: Make PCIe congestion event thresholds configurable

 .../ethernet/mellanox/mlx5/counters.rst       |  32 ++
 .../net/ethernet/mellanox/mlx5/core/Makefile  |   2 +-
 drivers/net/ethernet/mellanox/mlx5/core/en.h  |   2 +
 .../mellanox/mlx5/core/en/pcie_cong_event.c   | 464 ++++++++++++++++++
 .../mellanox/mlx5/core/en/pcie_cong_event.h   |  11 +
 .../net/ethernet/mellanox/mlx5/core/en_main.c |   3 +
 .../ethernet/mellanox/mlx5/core/en_stats.c    |   1 +
 .../ethernet/mellanox/mlx5/core/en_stats.h    |   1 +
 drivers/net/ethernet/mellanox/mlx5/core/eq.c  |   4 +
 include/linux/mlx5/mlx5_ifc.h                 |  67 ++-
 10 files changed, 575 insertions(+), 12 deletions(-)
 create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/en/pcie_cong_event.c
 create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/en/pcie_cong_event.h


base-commit: d3623dd5bd4e1fc9acfc08dd0064658bbbf1e8de
-- 
2.34.1