115 struct rxtx {  struct
123 	struct rxtx rxtx;       /* loop back buffer */  argument
323 		if (mdev_state->s[index].rxtx.count <  in handle_bar_write()
325 			mdev_state->s[index].rxtx.fifo[  in handle_bar_write()
326 					mdev_state->s[index].rxtx.head] = data;  in handle_bar_write()
327 			mdev_state->s[index].rxtx.count++;  in handle_bar_write()
328 			CIRCULAR_BUF_INC_IDX(mdev_state->s[index].rxtx.head);  in handle_bar_write()
337 			   (mdev_state->s[index].rxtx.count ==  in handle_bar_write()
373 			    (mdev_state->s[index].rxtx.head ==  in handle_bar_write()
374 					mdev_state->s[index].rxtx.tail)) {  in handle_bar_write()
394 			mdev_state->s[index].rxtx.count = 0;  in handle_bar_write()
395 			mdev_state->s[index].rxtx.head = 0;  in handle_bar_write()
396 			mdev_state->s[index].rxtx.tail = 0;  in handle_bar_write()
491 		if (mdev_state->s[index].rxtx.head !=  in handle_bar_read()
492 				 mdev_state->s[index].rxtx.tail) {  in handle_bar_read()
493 			*buf = mdev_state->s[index].rxtx.fifo[  in handle_bar_read()
494 						mdev_state->s[index].rxtx.tail];  in handle_bar_read()
495 			mdev_state->s[index].rxtx.count--;  in handle_bar_read()
496 			CIRCULAR_BUF_INC_IDX(mdev_state->s[index].rxtx.tail);  in handle_bar_read()
499 		if (mdev_state->s[index].rxtx.head ==  in handle_bar_read()
500 				mdev_state->s[index].rxtx.tail) {  in handle_bar_read()
537 		    (mdev_state->s[index].rxtx.count >=  in handle_bar_read()
543 		    (mdev_state->s[index].rxtx.head ==  in handle_bar_read()
544 				mdev_state->s[index].rxtx.tail))  in handle_bar_read()
574 		if (mdev_state->s[index].rxtx.head !=  in handle_bar_read()
575 				 mdev_state->s[index].rxtx.tail)  in handle_bar_read()
583 		if (mdev_state->s[index].rxtx.head ==  in handle_bar_read()
584 				 mdev_state->s[index].rxtx.tail)  in handle_bar_read()
598 			if (mdev_state->s[index].rxtx.count <  in handle_bar_read()