xref: /openbmc/linux/Documentation/devicetree/bindings/perf/marvell-cn10k-tad.yaml (revision 4cbf4772)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/perf/marvell-cn10k-tad.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Marvell CN10K LLC-TAD performance monitor

maintainers:
  - Bhaskara Budiredla <bbudiredla@marvell.com>

description: |
  The Tag-and-Data units (TADs) maintain coherence and contain CN10K
  shared on-chip last level cache (LLC). The tad pmu measures the
  performance of last-level cache. Each tad pmu supports up to eight
  counters.

  The DT setup comprises of number of tad blocks, the sizes of pmu
  regions, tad blocks and overall base address of the HW.

properties:
  compatible:
    const: marvell,cn10k-tad-pmu

  reg:
    maxItems: 1

  marvell,tad-cnt:
    description: specifies the number of tads on the soc
    $ref: /schemas/types.yaml#/definitions/uint32

  marvell,tad-page-size:
    description: specifies the size of each tad page
    $ref: /schemas/types.yaml#/definitions/uint32

  marvell,tad-pmu-page-size:
    description: specifies the size of page that the pmu uses
    $ref: /schemas/types.yaml#/definitions/uint32

required:
  - compatible
  - reg
  - marvell,tad-cnt
  - marvell,tad-page-size
  - marvell,tad-pmu-page-size

additionalProperties: false

examples:
  - |

    tad {
        #address-cells = <2>;
        #size-cells = <2>;

        tad_pmu@80000000 {
            compatible = "marvell,cn10k-tad-pmu";
            reg = <0x87e2 0x80000000 0x0 0x1000>;
            marvell,tad-cnt = <1>;
            marvell,tad-page-size = <0x1000>;
            marvell,tad-pmu-page-size = <0x1000>;
        };
    };