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drm/xe: Document topology mask query

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Provide information on the types of topology masks that can be
queried and add some examples.

Signed-off-by: Francois Dugast <francois.dugast@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Francois Dugast 2023-06-22 14:32:03 +02:00 committed by Rodrigo Vivi
parent 4f082f2c3a
commit 1bc56a934f
1 changed files with 24 additions and 0 deletions
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24
include/uapi/drm/xe_drm.h
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@ -212,6 +212,9 @@ struct drm_xe_query_gts {
/**
* struct drm_xe_query_topology_mask - describe the topology mask of a GT
*
* This is the hardware topology which reflects the internal physical
* structure of the GPU.
*
* If a query is made with a struct drm_xe_device_query where .query
* is equal to DRM_XE_DEVICE_QUERY_GT_TOPOLOGY, then the reply uses
* struct drm_xe_query_topology_mask in .data.
@ -220,8 +223,29 @@ struct drm_xe_query_topology_mask {
/** @gt_id: GT ID the mask is associated with */
__u16 gt_id;
/*
* To query the mask of Dual Sub Slices (DSS) available for geometry
* operations. For example a query response containing the following
* in mask:
* DSS_GEOMETRY ff ff ff ff 00 00 00 00
* means 32 DSS are available for geometry.
*/
#define XE_TOPO_DSS_GEOMETRY (1 << 0)
/*
* To query the mask of Dual Sub Slices (DSS) available for compute
* operations. For example a query response containing the following
* in mask:
* DSS_COMPUTE ff ff ff ff 00 00 00 00
* means 32 DSS are available for compute.
*/
#define XE_TOPO_DSS_COMPUTE (1 << 1)
/*
* To query the mask of Execution Units (EU) available per Dual Sub
* Slices (DSS). For example a query response containing the following
* in mask:
* EU_PER_DSS ff ff 00 00 00 00 00 00
* means each DSS has 16 EU.
*/
#define XE_TOPO_EU_PER_DSS (1 << 2)
/** @type: type of mask */
__u16 type;