[PATCH net-next] net/mlx5: Expose uar access and odp page fault counters
From: Tariq Toukan <tariqt@nvidia.com>
Date: 2025-09-25 10:46:24
Also in:
linux-doc, linux-rdma, lkml
Subsystem:
documentation, mellanox mlx5 core vpi driver, networking drivers, networking [general], the rest · Maintainers:
Jonathan Corbet, Saeed Mahameed, Leon Romanovsky, Tariq Toukan, Mark Bloch, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Akiva Goldberger <redacted>
Add three counters to vnic health reporter:
bar_uar_access, odp_local_triggered_page_fault, and
odp_remote_triggered_page_fault.
- bar_uar_access
number of WRITE or READ access operations to the UAR on the PCIe
BAR.
- odp_local_triggered_page_fault
number of locally-triggered page-faults due to ODP.
- odp_remote_triggered_page_fault
number of remotly-triggered page-faults due to ODP.
Example access:
$ devlink health diagnose pci/0000:08:00.0 reporter vnic
vNIC env counters:
total_error_queues: 0 send_queue_priority_update_flow: 0
comp_eq_overrun: 0 async_eq_overrun: 0 cq_overrun: 0
invalid_command: 0 quota_exceeded_command: 0
nic_receive_steering_discard: 0 icm_consumption: 1032
bar_uar_access: 1279 odp_local_triggered_page_fault: 20
odp_remote_triggered_page_fault: 34
Signed-off-by: Akiva Goldberger <redacted>
Reviewed-by: Moshe Shemesh <redacted>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
Documentation/networking/devlink/mlx5.rst | 6 ++++++
.../net/ethernet/mellanox/mlx5/core/diag/reporter_vnic.c | 9 +++++++++
2 files changed, 15 insertions(+)
diff --git a/Documentation/networking/devlink/mlx5.rst b/Documentation/networking/devlink/mlx5.rst
index 41c9b716699e..0e5f9c76e514 100644
--- a/Documentation/networking/devlink/mlx5.rst
+++ b/Documentation/networking/devlink/mlx5.rst@@ -385,6 +385,12 @@ Description of the vnic counters: amount of Interconnect Host Memory (ICM) consumed by the vnic in granularity of 4KB. ICM is host memory allocated by SW upon HCA request and is used for storing data structures that control HCA operation. +- bar_uar_access + number of WRITE or READ access operations to the UAR on the PCIe BAR. +- odp_local_triggered_page_fault + number of locally-triggered page-faults due to ODP. +- odp_remote_triggered_page_fault + number of remotly-triggered page-faults due to ODP. User commands examples:
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/reporter_vnic.c b/drivers/net/ethernet/mellanox/mlx5/core/diag/reporter_vnic.c
index 73f5b62b8c7f..172344734b8c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/diag/reporter_vnic.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/reporter_vnic.c@@ -107,6 +107,15 @@ void mlx5_reporter_vnic_diagnose_counters(struct mlx5_core_dev *dev, } if (MLX5_CAP_GEN(dev, nic_cap_reg)) mlx5_reporter_vnic_diagnose_counter_icm(dev, fmsg, vport_num, other_vport); + if (MLX5_CAP_GEN(dev, vnic_env_cnt_bar_uar_access)) + devlink_fmsg_u32_pair_put(fmsg, "bar_uar_access", + VNIC_ENV_GET(&vnic, bar_uar_access)); + if (MLX5_CAP_GEN(dev, vnic_env_cnt_odp_page_fault)) { + devlink_fmsg_u32_pair_put(fmsg, "odp_local_triggered_page_fault", + VNIC_ENV_GET(&vnic, odp_local_triggered_page_fault)); + devlink_fmsg_u32_pair_put(fmsg, "odp_remote_triggered_page_fault", + VNIC_ENV_GET(&vnic, odp_remote_triggered_page_fault)); + } devlink_fmsg_obj_nest_end(fmsg); devlink_fmsg_pair_nest_end(fmsg);
base-commit: a1f1f2422e098485b09e55a492de05cf97f9954d -- 2.31.1