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drm/amdgpu: reject gang submit on reserved VMIDs

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A gang submit won't work if the VMID is reserved and we can't flush out
VM changes from multiple engines at the same time.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König
2024-01-19 14:57:29 +01:00
committed by Alex Deucher
parent b6ad109166
commit 320debca1b
3 changed files with 30 additions and 1 deletions
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15
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
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@@ -1093,6 +1093,21 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
unsigned int i;
int r;
/*
* We can't use gang submit on with reserved VMIDs when the VM changes
* can't be invalidated by more than one engine at the same time.
*/
if (p->gang_size > 1 && !p->adev->vm_manager.concurrent_flush) {
for (i = 0; i < p->gang_size; ++i) {
struct drm_sched_entity *entity = p->entities[i];
struct drm_gpu_scheduler *sched = entity->rq->sched;
struct amdgpu_ring *ring = to_amdgpu_ring(sched);
if (amdgpu_vmid_uses_reserved(vm, ring->vm_hub))
return -EINVAL;
}
}
r = amdgpu_vm_clear_freed(adev, vm, NULL);
if (r)
return r;