On Fri, Nov 08, 2024 at 12:46:40PM -0800, Sanman Pradhan wrote: > diff --git a/Documentation/networking/device_drivers/ethernet/meta/fbnic.rst b/Documentation/networking/device_drivers/ethernet/meta/fbnic.rst > index 32ff114f5c26..13ebcdbb5f22 100644 > --- a/Documentation/networking/device_drivers/ethernet/meta/fbnic.rst > +++ b/Documentation/networking/device_drivers/ethernet/meta/fbnic.rst > @@ -27,3 +27,29 @@ driver takes over. > devlink dev info provides version information for all three components. In > addition to the version the hg commit hash of the build is included as a > separate entry. > + > +PCIe Statistics > +--------------- > + > +The fbnic driver exposes PCIe hardware performance statistics through debugfs > +(``pcie_stats``). These statistics provide insights into PCIe transaction > +behavior and potential performance bottlenecks. > + > +Statistics Categories > + > +1. PCIe Transaction Counters: > + > + These counters track PCIe transaction activity: > + - pcie_ob_rd_tlp: Outbound read Transaction Layer Packets count > + - pcie_ob_rd_dword: DWORDs transferred in outbound read transactions > + - pcie_ob_wr_tlp: Outbound write Transaction Layer Packets count > + - pcie_ob_wr_dword: DWORDs transferred in outbound write transactions > + - pcie_ob_cpl_tlp: Outbound completion TLP count > + - pcie_ob_cpl_dword: DWORDs transferred in outbound completion TLPs > + > +2. PCIe Resource Monitoring: > + > + These counters indicate PCIe resource exhaustion events: > + - pcie_ob_rd_no_tag: Read requests dropped due to tag unavailability > + - pcie_ob_rd_no_cpl_cred: Read requests dropped due to completion credit exhaustion > + - pcie_ob_rd_no_np_cred: Read requests dropped due to non-posted credit exhaustion The docs LGTM, thanks! Reviewed-by: Bagas Sanjaya <bagasdotme@xxxxxxxxx> -- An old man doll... just what I always wanted! - Clara
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