drm_i915_query_item Struct Reference

#include <i915_drm.h>

Public Attributes
__u64	query_id
__s32	length
__u32	flags
__u64	data_ptr

Detailed Description

struct drm_i915_query_item - An individual query for the kernel to process.

The behaviour is determined by the @query_id. Note that exactly what @data_ptr is also depends on the specific @query_id.

Member Data Documentation

data_ptr

__u64 drm_i915_query_item::data_ptr

@data_ptr:

Data will be written at the location pointed by @data_ptr when the value of @length matches the length of the data to be written by the kernel.

flags

__u32 drm_i915_query_item::flags

@flags:

When &query_id == DRM_I915_QUERY_TOPOLOGY_INFO, must be 0.

When &query_id == DRM_I915_QUERY_PERF_CONFIG, must be one of the following:

• DRM_I915_QUERY_PERF_CONFIG_LIST
  • DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID
  • DRM_I915_QUERY_PERF_CONFIG_FOR_UUID

When &query_id == DRM_I915_QUERY_GEOMETRY_SUBSLICES must contain a struct i915_engine_class_instance that references a render engine.

length

__s32 drm_i915_query_item::length

@length:

When set to zero by userspace, this is filled with the size of the data to be written at the @data_ptr pointer. The kernel sets this value to a negative value to signal an error on a particular query item.

query_id

__u64 drm_i915_query_item::query_id

@query_id:

The id for this query. Currently accepted query IDs are:

• DRM_I915_QUERY_TOPOLOGY_INFO (see struct drm_i915_query_topology_info)
• DRM_I915_QUERY_ENGINE_INFO (see struct drm_i915_engine_info)
• DRM_I915_QUERY_PERF_CONFIG (see struct drm_i915_query_perf_config)
• DRM_I915_QUERY_MEMORY_REGIONS (see struct drm_i915_query_memory_regions)
• DRM_I915_QUERY_HWCONFIG_BLOB (see GuC HWCONFIG blob uAPI)
• DRM_I915_QUERY_GEOMETRY_SUBSLICES (see struct drm_i915_query_topology_info)
• DRM_I915_QUERY_GUC_SUBMISSION_VERSION (see struct drm_i915_query_guc_submission_version)

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The documentation for this struct was generated from the following file:

• XenevaOS/BaseHdr/uapi/drm/i915_drm.h