34  * the trace path and the sink configuration. The event data is accessible
35  * via perf_get_aux(handle). However, a sink could "end" a perf output
36  * handle via the IRQ handler. And if the "sink" encounters a failure
65 /* preset - if sink ID is used as a configuration selector */
67 /* Sink ID - same for all ETMs */
197 	struct coresight_device *sink;  in free_sink_buffer()  local
206 	sink = coresight_get_sink(etm_event_cpu_path(event_data, cpu));  in free_sink_buffer()
207 	sink_ops(sink)->free_buffer(event_data->snk_config);  in free_sink_buffer()
219 	/* Free the sink buffers, if there are any */  in free_event_data()
287  * so that they can use the same sink buffers, when an event
311 	struct coresight_device *sink = NULL;  in etm_setup_aux()  local
320 	/* First get the selected sink from user space. */  in etm_setup_aux()
323 		sink = user_sink = coresight_get_sink_by_id(id);  in etm_setup_aux()
362 		 * No sink provided - look for a default sink for all the ETMs,  in etm_setup_aux()
364 		 * We allocate the sink specific buffers only once for this  in etm_setup_aux()
365 		 * event. If the ETMs have different default sink devices, we  in etm_setup_aux()
366 		 * can only use a single "type" of sink as the event can carry  in etm_setup_aux()
367 		 * only one sink specific buffer. Thus we have to make sure  in etm_setup_aux()
370 		 * we choose the first sink and check if the remaining ETMs  in etm_setup_aux()
371 		 * have a compatible default sink. We don't trace on a CPU  in etm_setup_aux()
372 		 * if the sink is not compatible.  in etm_setup_aux()
375 			/* Find the default sink for this ETM */  in etm_setup_aux()
376 			sink = coresight_find_default_sink(csdev);  in etm_setup_aux()
377 			if (!sink) {  in etm_setup_aux()
382 			/* Check if this sink compatible with the last sink */  in etm_setup_aux()
383 			if (last_sink && !sinks_compatible(last_sink, sink)) {  in etm_setup_aux()
387 			last_sink = sink;  in etm_setup_aux()
392 		 * list of devices from source to sink that can be  in etm_setup_aux()
395 		path = coresight_build_path(csdev, sink);  in etm_setup_aux()
412 	/* no sink found for any CPU - cannot trace */  in etm_setup_aux()
413 	if (!sink)  in etm_setup_aux()
421 	if (!sink_ops(sink)->alloc_buffer || !sink_ops(sink)->free_buffer)  in etm_setup_aux()
425 	 * Allocate the sink buffer for this session. All the sinks  in etm_setup_aux()
427 	 * same type. Thus the same sink configuration is used by the  in etm_setup_aux()
431 			sink_ops(sink)->alloc_buffer(sink, event, pages,  in etm_setup_aux()
451 	struct coresight_device *sink, *csdev = per_cpu(csdev_src, cpu);  in etm_event_start()  local
473 	 * sink from this ETM. We can't do much in this case if  in etm_event_start()
474 	 * the sink was specified or hinted to the driver. For  in etm_event_start()
480 	 * reachable to a sink.  in etm_event_start()
486 	/* We need a sink, no need to continue without one */  in etm_event_start()
487 	sink = coresight_get_sink(path);  in etm_event_start()
488 	if (WARN_ON_ONCE(!sink))  in etm_event_start()
524 	 * to handle cases where if the sink failed to start the  in etm_event_start()
540 	struct coresight_device *sink, *csdev = per_cpu(csdev_src, cpu);  in etm_event_stop()  local
585 	sink = coresight_get_sink(path);  in etm_event_stop()
586 	if (!sink)  in etm_event_stop()
597 	 * (e.g, the sink driver was unable to restart the  in etm_event_stop()
606 		if (!sink_ops(sink)->update_buffer)  in etm_event_stop()
609 		size = sink_ops(sink)->update_buffer(sink, handle,  in etm_event_stop()
613 		 * sink could have closed it from an IRQ.  in etm_event_stop()
614 		 * The sink driver must handle the race with  in etm_event_stop()
780 	 * If this function is called adding a sink then the hash is used for  in etm_perf_add_symlink_group()
781 	 * sink selection - see function coresight_get_sink_by_id().  in etm_perf_add_symlink_group()