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drm/amdgpu: get absolute offset from doorbell index

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This patch adds a helper function which converts a doorbell's
relative index in a BO to an absolute doorbell offset in the
doorbell BAR.

V2: No space between the variable name doc (Luben)

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian Koenig <christian.koenig@amd.com>
Acked-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
2023-04-12 14:39:00 +02:00
committed by Alex Deucher
parent 3b885ab27f
commit d124aa0ac9
2 changed files with 24 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h
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@@ -356,6 +356,9 @@ void amdgpu_mm_wdoorbell64(struct amdgpu_device *adev, u32 index, u64 v);
int amdgpu_doorbell_init(struct amdgpu_device *adev);
void amdgpu_doorbell_fini(struct amdgpu_device *adev);
int amdgpu_doorbell_create_kernel_doorbells(struct amdgpu_device *adev);
uint32_t amdgpu_doorbell_index_on_bar(struct amdgpu_device *adev,
struct amdgpu_bo *db_bo,
uint32_t doorbell_index);
#define RDOORBELL32(index) amdgpu_mm_rdoorbell(adev, (index))
#define WDOORBELL32(index, v) amdgpu_mm_wdoorbell(adev, (index), (v))