diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 1045be4b547c..143d11afe0e5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -406,6 +406,30 @@ static void amdgpu_vm_fini_entities(struct amdgpu_vm *vm) } /** + * amdgpu_vm_generation - return the page table re-generation counter + * @adev: the amdgpu_device + * @vm: optional VM to check, might be NULL + * + * Returns a page table re-generation token to allow checking if submissions + * are still valid to use this VM. The VM parameter might be NULL in which case + * just the VRAM lost counter will be used. + */ +uint64_t amdgpu_vm_generation(struct amdgpu_device *adev, struct amdgpu_vm *vm) +{ + uint64_t result = (u64)atomic_read(&adev->vram_lost_counter) << 32; + + if (!vm) + return result; + + result += vm->generation; + /* Add one if the page tables will be re-generated on next CS */ + if (drm_sched_entity_error(&vm->delayed)) + ++result; + + return result; +} + +/** * amdgpu_vm_validate_pt_bos - validate the page table BOs * * @adev: amdgpu device pointer @@ -428,6 +452,7 @@ int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm, int r; if (drm_sched_entity_error(&vm->delayed)) { + ++vm->generation; amdgpu_vm_bo_reset_state_machine(vm); amdgpu_vm_fini_entities(vm); r = amdgpu_vm_init_entities(adev, vm); @@ -2134,6 +2159,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm) vm->last_update = dma_fence_get_stub(); vm->last_unlocked = dma_fence_get_stub(); vm->last_tlb_flush = dma_fence_get_stub(); + vm->generation = 0; mutex_init(&vm->eviction_lock); vm->evicting = false; |