68  * be mapped cache-able and is only applicable to send windows.
268  * These registers are common to send/receive windows although they
269  * differ for user/kernel windows. As we resolve the TODOs we may
317 	 * TODO: Can we mfspr(AMR) even for user windows?  in init_xlate_regs()
352  * Design note: For NX receive windows, NX allocates the FIFO buffer in OPAL
356  *	write the per-chip RX FIFO addresses to the windows during boot-up
515 		pr_err("Too many (%d) open windows\n", VAS_WINDOWS_PER_CHIP);  in vas_assign_window_id()
576  *        (so both send and receive windows are on the same VAS instance)
579  * NOTE: We access ->windows[] table and assume that vinst->mutex is held.
591 	rxwin = vinst->windows[winid];  in get_user_rxwin()
626  * We have two tables of windows in a VAS instance. The first one,
627  * ->windows[], contains all the windows in the instance and allows
628  * looking up a window by its id. It is used to look up send windows
629  * during fault handling and receive windows when pairing user space
630  * send/receive windows.
632  * The second table, ->rxwin[], contains receive windows that are
637  * Here, we save @window in the ->windows[] table. If it is a receive
656 	WARN_ON_ONCE(vinst->windows[id] != NULL);  in set_vinst_win()
657 	vinst->windows[id] = window;  in set_vinst_win()
663  * Clear this window from the table(s) of windows for this VAS instance.
678 	WARN_ON_ONCE(vinst->windows[id] != window);  in clear_vinst_win()
679 	vinst->windows[id] = NULL;  in clear_vinst_win()
693 	 *	->notify_disable	False for NX windows  in init_winctx_for_rxwin()
694 	 *	->intr_disable		False for Fault Windows  in init_winctx_for_rxwin()
695 	 *	->xtra_write		False for NX windows  in init_winctx_for_rxwin()
696 	 *	->notify_early		NA for NX windows  in init_winctx_for_rxwin()
697 	 *	->rsvd_txbuf_count	NA for Rx windows  in init_winctx_for_rxwin()
698 	 *	->lpid, ->pid, ->tid	NA for Rx windows  in init_winctx_for_rxwin()
782 		 * Section 3.1.4.32: NX Windows must not disable notification,  in rx_win_args_valid()
794 		 * Section 3.1.4.32: Fault windows must disable notification  in rx_win_args_valid()
802 		 * User receive windows are only for fast-thread-wakeup  in rx_win_args_valid()
918 	 *	->notify_disable	False for NX windows  in init_winctx_for_txwin()
919 	 *	->xtra_write		False for NX windows  in init_winctx_for_txwin()
920 	 *	->notify_early		NA for NX windows  in init_winctx_for_txwin()
921 	 *	->lnotify_lpid		NA for Tx windows  in init_winctx_for_txwin()
922 	 *	->lnotify_pid		NA for Tx windows  in init_winctx_for_txwin()
923 	 *	->lnotify_tid		NA for Tx windows  in init_winctx_for_txwin()
924 	 *	->tx_win_cred_mode	Ignore for now for NX windows  in init_winctx_for_txwin()
925 	 *	->rx_win_cred_mode	Ignore for now for NX windows  in init_winctx_for_txwin()
1008 	 * receive window (applicable only to FTW windows), use the vasid  in vas_tx_win_open()
1045 	 * kernel's address space. For user windows, user must issue an  in vas_tx_win_open()
1144 	 * Only NX windows are supported for now and hardware assumes  in vas_paste_crb()
1145 	 * report-enable flag is set for NX windows. Ensure software  in vas_paste_crb()
1360  * Send windows and fault window uses credit mechanism as follows:
1362  * Send windows:
1419 	window = vinst->windows[winid];  in vas_pswid_to_window()
1429 	 * NX GZIP user send window. FTW windows should not incur faults  in vas_pswid_to_window()