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-rw-r--r--Documentation/ABI/testing/sysfs-bus-pci29
1 files changed, 29 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
index 25c9c39770c6..e5cfd170b491 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci
+++ b/Documentation/ABI/testing/sysfs-bus-pci
@@ -375,3 +375,32 @@ Description:
The value comes from the PCI kernel device state and can be one
of: "unknown", "error", "D0", D1", "D2", "D3hot", "D3cold".
The file is read only.
+
+What: /sys/bus/pci/devices/.../sriov_vf_total_msix
+Date: January 2021
+Contact: Leon Romanovsky <leonro@nvidia.com>
+Description:
+ This file is associated with a SR-IOV physical function (PF).
+ It contains the total number of MSI-X vectors available for
+ assignment to all virtual functions (VFs) associated with PF.
+ The value will be zero if the device doesn't support this
+ functionality. For supported devices, the value will be
+ constant and won't be changed after MSI-X vectors assignment.
+
+What: /sys/bus/pci/devices/.../sriov_vf_msix_count
+Date: January 2021
+Contact: Leon Romanovsky <leonro@nvidia.com>
+Description:
+ This file is associated with a SR-IOV virtual function (VF).
+ It allows configuration of the number of MSI-X vectors for
+ the VF. This allows devices that have a global pool of MSI-X
+ vectors to optimally divide them between VFs based on VF usage.
+
+ The values accepted are:
+ * > 0 - this number will be reported as the Table Size in the
+ VF's MSI-X capability
+ * < 0 - not valid
+ * = 0 - will reset to the device default value
+
+ The file is writable if the PF is bound to a driver that
+ implements ->sriov_set_msix_vec_count().