[PATCH v2 0/2] Allocate and map doorbell based on requests

[Saleemkhan Jamadar]

Hi,

Why:
The current implementation of doorbell mapping does not handle
the IP specific doorbell size and offset range. Multiple doorbell
allocation when requested cannot be allocated due hard use of
"struct amdgpu_usermode_queue" parameters. But these parameters
vary for each request of doorbell mapping. For example VCN needs
to allocate AGDB(Aggregate doorbell) and per instance doorbell.
Parameters db_handle buffer allocated in userspace)and db_offset
vary with respect to VCN AGDB and per instance doorbell.
When compared to GFX apart from above two parameters db_size
is also different.

How:
Introduce another structure to locally populate the varying parameters.
Modify the the door mapping api to use these structure parameters to get
db_size and offset range based on the queue type.
Regards,
Saleem


Saleemkhan Jamadar (2):
  drm/amdgpu: map doorbell for the requested userq
  drm/amdgpu: add doorbell size and offset range for VCN and VPE

 drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c | 49 ++++++++++++++-----
 .../gpu/drm/amd/include/amdgpu_userqueue.h    | 12 +++++
 2 files changed, 50 insertions(+), 11 deletions(-)

-- 
2.34.1