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drm/amdgpu: rework TLB flushing

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Instead of tracking the VM updates through the dependencies just use a
sequence counter for page table updates which indicates the need to
flush the TLB.

This reduces the need to flush the TLB drastically.

v2: squash in NULL check fix (Christian)

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König
2022-03-15 15:27:45 +01:00
committed by Alex Deucher
parent e997b82745
commit 5255e146c9
6 changed files with 76 additions and 32 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
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@@ -277,7 +277,7 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
unsigned vmhub = ring->funcs->vmhub;
uint64_t fence_context = adev->fence_context + ring->idx;
bool needs_flush = vm->use_cpu_for_update;
uint64_t updates = sync->last_vm_update;
uint64_t updates = amdgpu_vm_tlb_seq(vm);
int r;
*id = vm->reserved_vmid[vmhub];
@@ -338,7 +338,7 @@ static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm,
unsigned vmhub = ring->funcs->vmhub;
struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub];
uint64_t fence_context = adev->fence_context + ring->idx;
uint64_t updates = sync->last_vm_update;
uint64_t updates = amdgpu_vm_tlb_seq(vm);
int r;
job->vm_needs_flush = vm->use_cpu_for_update;
@@ -426,7 +426,7 @@ int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
if (r)
goto error;
id->flushed_updates = sync->last_vm_update;
id->flushed_updates = amdgpu_vm_tlb_seq(vm);
job->vm_needs_flush = true;
}