gt/uc/intel_guc_log.c

218  * Sub buffer switch callback. Called whenever relay has to switch to a new
219  * sub buffer, relay stays on the same sub buffer if 0 is returned.
226 	 * Use no-overwrite mode by default, where relay will stop accepting
228 	 * There is no strict synchronization enforced by relay between Consumer
242  * file_create() callback. Creates relay file in debugfs.
253 	 * This to enable the use of a single buffer for the relay channel and
272  * file_remove() default callback. Removes relay file in debugfs.
280 /* relay channel callbacks */
296 	relay_reserve(log->relay.channel, log->vma->obj->base.size -
300 	relay_flush(log->relay.channel);
314 	return relay_reserve(log->relay.channel, 0);
383 	mutex_lock(&log->relay.lock);
401 		log->relay.full_count++;
410 	/* For relay logging, we exclude error state capture */
476 	mutex_unlock(&log->relay.lock);
482 		container_of(work, struct intel_guc_log, relay.flush_work);
489 	lockdep_assert_held(&log->relay.lock);
499 	log->relay.buf_in_use = true;
506 	lockdep_assert_held(&log->relay.lock);
509 	log->relay.buf_in_use = false;
514 	mutex_init(&log->relay.lock);
515 	INIT_WORK(&log->relay.flush_work, copy_debug_logs_work);
516 	log->relay.started = false;
527 	lockdep_assert_held(&log->relay.lock);
539 	 * latency, for consuming the logs from relay. Also doesn't take
552 		guc_err(guc, "Couldn't create relay channel for logging\n");
559 	log->relay.channel = guc_log_relay_chan;
566 	lockdep_assert_held(&log->relay.lock);
568 	relay_close(log->relay.channel);
569 	log->relay.channel = NULL;
715 	mutex_lock(&log->relay.lock);
740 	mutex_unlock(&log->relay.lock);
747 	mutex_unlock(&log->relay.lock);
754 	if (log->relay.started)
760 	 * flush on relay enabling, since GuC only notifies us once.
762 	queue_work(system_highpri_wq, &log->relay.flush_work);
764 	log->relay.started = true;
774 	if (!log->relay.started)
781 	flush_work(&log->relay.flush_work);
791  * Stops the relay log. Called from intel_guc_log_relay_close(), so no
800 	if (!log->relay.started)
805 	flush_work(&log->relay.flush_work);
807 	log->relay.started = false;
814 	mutex_lock(&log->relay.lock);
818 	mutex_unlock(&log->relay.lock);
823 	if (log->relay.started)
824 		queue_work(system_highpri_wq, &log->relay.flush_work);
845  * intel_guc_log_info - dump information about GuC log relay
856 		drm_puts(p, "GuC log relay not created\n");
862 	drm_printf(p, "\tRelay full count: %u\n", log->relay.full_count);