drm/amdgpu: create kernel doorbell pages

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This patch:
- creates a doorbell page for graphics driver usages.
- adds a few new varlables in adev->doorbell structure to
  keep track of kernel's doorbell-bo.
- removes the adev->doorbell.ptr variable, replaces it with
  kernel-doorbell-bo's cpu address.

V2: - Create doorbell BO directly, no wrappe functions (Alex)
    - no additional doorbell structure (Alex, Christian)
    - Use doorbell_cpu_ptr, remove ioremap (Christian, Alex)
    - Allocate one extra page of doorbells for MES (Alex)

V4: Move MES doorbell base init into MES related patch (Christian)

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: Shashank Sharma <shashank.sharma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Shashank Sharma 2023-07-14 15:19:54 +02:00 • committed by Alex Deucher

parent 36f3f375ed

commit 54c30d2a8d

3 changed files with 53 additions and 14 deletions

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8

drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h

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52

drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c

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7

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

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