diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 8fcc743dfa86..c91d5c7a273d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -2682,6 +2682,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, } INIT_KFIFO(vm->faults); + vm->fault_credit = 16; return 0; @@ -2776,6 +2777,36 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm) } /** + * amdgpu_vm_pasid_fault_credit - Check fault credit for given PASID + * + * @adev: amdgpu_device pointer + * @pasid: PASID do identify the VM + * + * This function is expected to be called in interrupt context. Returns + * true if there was fault credit, false otherwise + */ +bool amdgpu_vm_pasid_fault_credit(struct amdgpu_device *adev, + unsigned int pasid) +{ + struct amdgpu_vm *vm; + + spin_lock(&adev->vm_manager.pasid_lock); + vm = idr_find(&adev->vm_manager.pasid_idr, pasid); + spin_unlock(&adev->vm_manager.pasid_lock); + if (!vm) + /* VM not found, can't track fault credit */ + return true; + + /* No lock needed. only accessed by IRQ handler */ + if (!vm->fault_credit) + /* Too many faults in this VM */ + return false; + + vm->fault_credit--; + return true; +} + +/** * amdgpu_vm_manager_init - init the VM manager * * @adev: amdgpu_device pointer |
