21  * The maximum FIFO size for fault window can be 8MB
23  * instance will be having fault window.
51  * It takes credit on fault window, updates nx_fault_stamp in CRB with
54  * pswid - window ID of the window on which the request is sent.
61  * available on fault window. Otherwise, returns with RMA_reject.
63  * Total credits available on fault window: FIFO_SIZE(4MB)/CRBS_SIZE(128)
71 	struct pnv_vas_window *window;  in vas_fault_thread_fn()  local
84 	 * pswid	NX assigns window ID. Set pswid to -1 after  in vas_fault_thread_fn()
123 		 * Return credit for the fault window.  in vas_fault_thread_fn()
132 		window = vas_pswid_to_window(vinst,  in vas_fault_thread_fn()
135 		if (IS_ERR(window)) {  in vas_fault_thread_fn()
138 			 * window but we can't find that window and we can't  in vas_fault_thread_fn()
140 			 * window).  in vas_fault_thread_fn()
155 			if (window->user_win)  in vas_fault_thread_fn()
156 				vas_update_csb(crb, &window->vas_win.task_ref);  in vas_fault_thread_fn()
158 				WARN_ON_ONCE(!window->user_win);  in vas_fault_thread_fn()
161 			 * Return credit for send window after processing  in vas_fault_thread_fn()
164 			vas_return_credit(window, true);  in vas_fault_thread_fn()
196  * Fault window is opened per VAS instance. NX pastes fault CRB in fault