8def3aeb71
Add qcom,ramoops binding for its device and it is exactly copy of ramoops device but differ in just memory is dynamically reserved during early boot. Change-Id: I2b2b288061ba001aa8cc9a73fad1176a01ce4769 Signed-off-by: Mukesh Ojha <quic_mojha@quicinc.com>
125 lines
3.8 KiB
YAML
125 lines
3.8 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: "http://devicetree.org/schemas/reserved-memory/qcom,ramoops.yaml#"
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$schema: "http://devicetree.org/meta-schemas/core.yaml#"
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title: Qualcomm Technologies, Inc. Dynamic ramoops
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description: |
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Qualcomm Technologies, Inc. dynamic ramoops logger provide a means
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of storing the ramoops data to some dynamically reserved memory
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instead of traditionally implemented ramoops where the region should
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be statically fixed ram region. Because of its similarity with ramoops
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it will also have same set of property what ramoops have it in its
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schema and is going to contain traditional ramoops frontend data and
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this region will be collected via Qualcomm Technologies, Inc. Minidump
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infrastructure provided from the boot firmware.
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maintainers:
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- Mukesh Ojha <quic_mojha@quicinc.com>
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properties:
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compatible:
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items:
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- const: qcom,ramoops
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memory-region:
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maxItems: 1
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description: handle to memory reservation for qcom,ramoops region.
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ecc-size:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: enables ECC support and specifies ECC buffer size in bytes
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default: 0 # no ECC
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record-size:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: maximum size in bytes of each kmsg dump
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default: 0
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console-size:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: size in bytes of log buffer reserved for kernel messages
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default: 0
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ftrace-size:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: size in bytes of log buffer reserved for function tracing and profiling
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default: 0
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pmsg-size:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: size in bytes of log buffer reserved for userspace messages
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default: 0
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mem-type:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: if present, sets the type of mapping is to be used to map the reserved region.
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default: 0
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oneOf:
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- const: 0
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description: write-combined
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- const: 1
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description: unbuffered
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- const: 2
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description: cached
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max-reason:
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 2 # log oopses and panics
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maximum: 0x7fffffff
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description: |
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If present, sets maximum type of kmsg dump reasons to store.
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This can be set to INT_MAX to store all kmsg dumps.
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See include/linux/kmsg_dump.h KMSG_DUMP_* for other kmsg dump reason values.
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Setting this to 0 (KMSG_DUMP_UNDEF), means the reason filtering will be
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controlled by the printk.always_kmsg_dump boot param.
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If unset, it will be 2 (KMSG_DUMP_OOPS), otherwise 5 (KMSG_DUMP_MAX).
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flags:
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 0
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description: |
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If present, pass ramoops behavioral flags
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(see include/linux/pstore_ram.h RAMOOPS_FLAG_* for flag values).
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no-dump-oops:
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deprecated: true
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type: boolean
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description: |
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Use max_reason instead. If present, and max_reason is not specified,
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it is equivalent to max_reason = 1 (KMSG_DUMP_PANIC).
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unbuffered:
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deprecated: true
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type: boolean
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description: |
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Use mem_type instead. If present, and mem_type is not specified,
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it is equivalent to mem_type = 1 and uses unbuffered mappings to map
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the reserved region (defaults to buffered mappings mem_type = 0).
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If both are specified -- "mem_type" overrides "unbuffered".
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unevaluatedProperties: false
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required:
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- compatible
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- memory-region
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anyOf:
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- required: [record-size]
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- required: [console-size]
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- required: [ftrace-size]
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- required: [pmsg-size]
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examples:
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- |
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qcom_ramoops {
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compatible = "qcom,ramoops";
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memory-region = <&qcom_ramoops_region>;
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console-size = <0x8000>; /* 32kB */
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record-size = <0x400>; /* 1kB */
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ecc-size = <16>;
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};
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