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drm/amdgpu: prefer VMIDs idle on the current ring 

Prefer to use a VMIDs which are idle on the ring we want to submit to. This
also removes bubbling idle VMIDs up on the LRU, which is actually not
beneficial.

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2016-05-23 15:30:08 +02:00 committed by Alex Deucher
parent 3542023896
commit 36fd7c5c3c
1 changed files with 7 additions and 13 deletions
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20
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@ -236,21 +236,15 @@ int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
} while (i != ring->idx);
id = list_first_entry(&adev->vm_manager.ids_lru,
struct amdgpu_vm_id,
list);
/* Check if we have an idle VMID */
list_for_each_entry(id, &adev->vm_manager.ids_lru, list) {
if (amdgpu_sync_is_idle(&id->active, ring))
break;
if (!amdgpu_sync_is_idle(&id->active, NULL)) {
struct list_head *head = &adev->vm_manager.ids_lru;
struct amdgpu_vm_id *tmp;
}
list_for_each_entry_safe(id, tmp, &adev->vm_manager.ids_lru,
list) {
if (amdgpu_sync_is_idle(&id->active, NULL)) {
list_move(&id->list, head);
head = &id->list;
}
}
/* If we can't find a idle VMID to use, just wait for the oldest */
if (&id->list == &adev->vm_manager.ids_lru) {
id = list_first_entry(&adev->vm_manager.ids_lru,
struct amdgpu_vm_id,
list);