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drm/v3d: Create a CPU job extension for the reset timestamp job

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A CPU job is a type of job that performs operations that requires CPU
intervention. A reset timestamp job is a job that resets the timestamp
queries based on the value offset of the first query. As V3D doesn't
provide any mechanism to obtain a timestamp from the GPU, it is a job
that needs CPU intervention.

So, create a user extension for the CPU job that enables the creation
of a reset timestamp job. This user extension will allow the creation of
a CPU job that resets the timestamp value in the timestamp BO and resets
the availability syncobj.

Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231130164420.932823-16-mcanal@igalia.com
This commit is contained in:
Maíra Canal
2023-11-30 13:40:37 -03:00
parent 9ba0ff3e08
commit 34a101e642
4 changed files with 101 additions and 0 deletions
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27
include/uapi/drm/v3d_drm.h
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@@ -74,6 +74,7 @@ struct drm_v3d_extension {
#define DRM_V3D_EXT_ID_MULTI_SYNC 0x01
#define DRM_V3D_EXT_ID_CPU_INDIRECT_CSD 0x02
#define DRM_V3D_EXT_ID_CPU_TIMESTAMP_QUERY 0x03
#define DRM_V3D_EXT_ID_CPU_RESET_TIMESTAMP_QUERY 0x04
__u32 flags; /* mbz */
};
@@ -427,6 +428,29 @@ struct drm_v3d_timestamp_query {
__u32 pad;
};
/**
* struct drm_v3d_reset_timestamp_query - ioctl extension for the CPU job to
* reset timestamp queries
*
* When an extension DRM_V3D_EXT_ID_CPU_RESET_TIMESTAMP_QUERY is defined, it
* points to this extension to define a reset timestamp submission. This CPU
* job will reset the timestamp queries based on value offset of the first
* query. Moreover, it will reset the timestamp syncobj to reset query
* availability.
*/
struct drm_v3d_reset_timestamp_query {
struct drm_v3d_extension base;
/* Array of timestamp's syncobjs to indicate its availability */
__u64 syncs;
/* Offset of the first query within the timestamp BO for its value */
__u32 offset;
/* Number of queries */
__u32 count;
};
struct drm_v3d_submit_cpu {
/* Pointer to a u32 array of the BOs that are referenced by the job.
*
@@ -435,6 +459,9 @@ struct drm_v3d_submit_cpu {
*
* For DRM_V3D_EXT_ID_TIMESTAMP_QUERY, it must contain only one BO,
* that will contain the timestamp.
*
* For DRM_V3D_EXT_ID_CPU_RESET_TIMESTAMP_QUERY, it must contain only
* one BO, that contains the timestamp.
*/
__u64 bo_handles;