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drm/amdgpu: validate VM PTs only on eviction

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We don't need to validate them again if the eviction counter didn't changed.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König
2016-06-21 16:28:15 +02:00
committed by Alex Deucher
parent dbd5ed60ac
commit 5a712a8727
4 changed files with 20 additions and 4 deletions
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13
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@@ -115,16 +115,26 @@ void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
/**
* amdgpu_vm_get_bos - add the vm BOs to a duplicates list
*
* @adev: amdgpu device pointer
* @vm: vm providing the BOs
* @duplicates: head of duplicates list
*
* Add the page directory to the BO duplicates list
* for command submission.
*/
void amdgpu_vm_get_pt_bos(struct amdgpu_vm *vm, struct list_head *duplicates)
void amdgpu_vm_get_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
struct list_head *duplicates)
{
uint64_t num_evictions;
unsigned i;
/* We only need to validate the page tables
* if they aren't already valid.
*/
num_evictions = atomic64_read(&adev->num_evictions);
if (num_evictions == vm->last_eviction_counter)
return;
/* add the vm page table to the list */
for (i = 0; i <= vm->max_pde_used; ++i) {
struct amdgpu_bo_list_entry *entry = &vm->page_tables[i].entry;
@@ -1534,6 +1544,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
amdgpu_bo_unreserve(vm->page_directory);
if (r)
goto error_free_page_directory;
vm->last_eviction_counter = atomic64_read(&adev->num_evictions);
return 0;