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drm/amdgpu: UAPI for user queue management

Arvind Yadav requested to merge (removed):userq-staging into master

This patch intorduces new UAPI/IOCTL for usermode graphics queue. The userspace app will fill this structure and request the graphics driver to add a graphics work queue for it. The output of this UAPI is a queue id.

This UAPI maps the queue into GPU, so the graphics app can start submitting work to the queue as soon as the call returns.

V2: Addressed review comments from Alex and Christian - Make the doorbell offset's comment clearer - Change the output parameter name to queue_id

V3: Integration with doorbell manager

V4: - Updated the UAPI doc (Pierre-Eric) - Created a Union for engine specific MQDs (Alex) - Added Christian's R-B V5: - Add variables for GDS and CSA in MQD structure (Alex) - Make MQD data a ptr-size pair instead of union (Alex)

Cc: Alex Deucher alexander.deucher@amd.com Cc: Christian Koenig christian.koenig@amd.com Reviewed-by: Christian König christian.koenig@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Shashank Sharma shashank.sharma@amd.com

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