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drm/amdgpu: Enable userq fence interrupt support

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Add support to handle the userqueue protected fence signal hardware
interrupt.

Create a xarray which maps the doorbell index to the fence driver address.
This would help to retrieve the fence driver information when an userq fence
interrupt is triggered. Firmware sends the doorbell offset value and
this info is compared with the queue's mqd doorbell offset value.
If they are same, we process the userq fence interrupt.

v1:(Christian):
  - use xa_load to extract the fence driver.
  - move the amdgpu_userq_fence_driver_process call within the xa_lock
    as there is a chance that fence_drv might be freed.

Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Arunpravin Paneer Selvam
2024-10-30 10:38:46 +05:30
committed by Alex Deucher
parent 15e30a6e47
commit 8949843762
3 changed files with 20 additions and 13 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
View File

@@ -71,6 +71,7 @@ int amdgpu_userq_fence_driver_alloc(struct amdgpu_device *adev,
struct amdgpu_usermode_queue *userq)
{
struct amdgpu_userq_fence_driver *fence_drv;
unsigned long flags;
int r;
fence_drv = kzalloc(sizeof(*fence_drv), GFP_KERNEL);
@@ -98,6 +99,11 @@ int amdgpu_userq_fence_driver_alloc(struct amdgpu_device *adev,
fence_drv->context = dma_fence_context_alloc(1);
get_task_comm(fence_drv->timeline_name, current);
xa_lock_irqsave(&adev->userq_xa, flags);
__xa_store(&adev->userq_xa, userq->doorbell_index,
fence_drv, GFP_KERNEL);
xa_unlock_irqrestore(&adev->userq_xa, flags);
userq->fence_drv = fence_drv;
return 0;