3  * Performance event support - Freescale Embedded Performance Monitor
23 	struct perf_event *event[MAX_HWEVENTS];  member
175 static void fsl_emb_pmu_read(struct perf_event *event)  in fsl_emb_pmu_read()  argument
179 	if (event->hw.state & PERF_HES_STOPPED)  in fsl_emb_pmu_read()
188 		prev = local64_read(&event->hw.prev_count);  in fsl_emb_pmu_read()
190 		val = read_pmc(event->hw.idx);  in fsl_emb_pmu_read()
191 	} while (local64_cmpxchg(&event->hw.prev_count, prev, val) != prev);  in fsl_emb_pmu_read()
195 	local64_add(delta, &event->count);  in fsl_emb_pmu_read()
196 	local64_sub(delta, &event->hw.period_left);  in fsl_emb_pmu_read()
268 	struct perf_event *event;  in collect_events()  local
276 	for_each_sibling_event(event, group) {  in collect_events()
277 		if (!is_software_event(event) &&  in collect_events()
278 		    event->state != PERF_EVENT_STATE_OFF) {  in collect_events()
281 			ctrs[n] = event;  in collect_events()
289 static int fsl_emb_pmu_add(struct perf_event *event, int flags)  in fsl_emb_pmu_add()  argument
297 	perf_pmu_disable(event->pmu);  in fsl_emb_pmu_add()
300 	if (event->hw.config & FSL_EMB_EVENT_RESTRICTED)  in fsl_emb_pmu_add()
308 		if (cpuhw->event[i])  in fsl_emb_pmu_add()
317 	event->hw.idx = i;  in fsl_emb_pmu_add()
318 	cpuhw->event[i] = event;  in fsl_emb_pmu_add()
322 	if (event->hw.sample_period) {  in fsl_emb_pmu_add()
323 		s64 left = local64_read(&event->hw.period_left);  in fsl_emb_pmu_add()
327 	local64_set(&event->hw.prev_count, val);  in fsl_emb_pmu_add()
330 		event->hw.state = PERF_HES_STOPPED | PERF_HES_UPTODATE;  in fsl_emb_pmu_add()
333 		event->hw.state &= ~(PERF_HES_STOPPED | PERF_HES_UPTODATE);  in fsl_emb_pmu_add()
337 	perf_event_update_userpage(event);  in fsl_emb_pmu_add()
339 	write_pmlcb(i, event->hw.config >> 32);  in fsl_emb_pmu_add()
340 	write_pmlca(i, event->hw.config_base);  in fsl_emb_pmu_add()
345 	perf_pmu_enable(event->pmu);  in fsl_emb_pmu_add()
350 static void fsl_emb_pmu_del(struct perf_event *event, int flags)  in fsl_emb_pmu_del()  argument
353 	int i = event->hw.idx;  in fsl_emb_pmu_del()
355 	perf_pmu_disable(event->pmu);  in fsl_emb_pmu_del()
359 	fsl_emb_pmu_read(event);  in fsl_emb_pmu_del()
363 	WARN_ON(event != cpuhw->event[event->hw.idx]);  in fsl_emb_pmu_del()
369 	cpuhw->event[i] = NULL;  in fsl_emb_pmu_del()
370 	event->hw.idx = -1;  in fsl_emb_pmu_del()
373 	 * TODO: if at least one restricted event exists, and we  in fsl_emb_pmu_del()
376 	 * a non-restricted event, migrate that event to the  in fsl_emb_pmu_del()
383 	perf_pmu_enable(event->pmu);  in fsl_emb_pmu_del()
387 static void fsl_emb_pmu_start(struct perf_event *event, int ef_flags)  in fsl_emb_pmu_start()  argument
393 	if (event->hw.idx < 0 || !event->hw.sample_period)  in fsl_emb_pmu_start()
396 	if (!(event->hw.state & PERF_HES_STOPPED))  in fsl_emb_pmu_start()
400 		WARN_ON_ONCE(!(event->hw.state & PERF_HES_UPTODATE));  in fsl_emb_pmu_start()
403 	perf_pmu_disable(event->pmu);  in fsl_emb_pmu_start()
405 	event->hw.state = 0;  in fsl_emb_pmu_start()
406 	left = local64_read(&event->hw.period_left);  in fsl_emb_pmu_start()
410 	write_pmc(event->hw.idx, val);  in fsl_emb_pmu_start()
412 	perf_event_update_userpage(event);  in fsl_emb_pmu_start()
413 	perf_pmu_enable(event->pmu);  in fsl_emb_pmu_start()
417 static void fsl_emb_pmu_stop(struct perf_event *event, int ef_flags)  in fsl_emb_pmu_stop()  argument
421 	if (event->hw.idx < 0 || !event->hw.sample_period)  in fsl_emb_pmu_stop()
424 	if (event->hw.state & PERF_HES_STOPPED)  in fsl_emb_pmu_stop()
428 	perf_pmu_disable(event->pmu);  in fsl_emb_pmu_stop()
430 	fsl_emb_pmu_read(event);  in fsl_emb_pmu_stop()
431 	event->hw.state |= PERF_HES_STOPPED | PERF_HES_UPTODATE;  in fsl_emb_pmu_stop()
432 	write_pmc(event->hw.idx, 0);  in fsl_emb_pmu_stop()
434 	perf_event_update_userpage(event);  in fsl_emb_pmu_stop()
435 	perf_pmu_enable(event->pmu);  in fsl_emb_pmu_stop()
442 static void hw_perf_event_destroy(struct perf_event *event)  in hw_perf_event_destroy()  argument
482 static int fsl_emb_pmu_event_init(struct perf_event *event)  in fsl_emb_pmu_event_init()  argument
497 	switch (event->attr.type) {  in fsl_emb_pmu_event_init()
499 		ev = event->attr.config;  in fsl_emb_pmu_event_init()
506 		err = hw_perf_cache_event(event->attr.config, &ev);  in fsl_emb_pmu_event_init()
512 		ev = event->attr.config;  in fsl_emb_pmu_event_init()
519 	event->hw.config = ppmu->xlate_event(ev);  in fsl_emb_pmu_event_init()
520 	if (!(event->hw.config & FSL_EMB_EVENT_VALID))  in fsl_emb_pmu_event_init()
525 	 * other hardware events in the group.  We assume the event  in fsl_emb_pmu_event_init()
529 	if (event->group_leader != event) {  in fsl_emb_pmu_event_init()
530 		n = collect_events(event->group_leader,  in fsl_emb_pmu_event_init()
536 	if (event->hw.config & FSL_EMB_EVENT_RESTRICTED) {  in fsl_emb_pmu_event_init()
547 	event->hw.idx = -1;  in fsl_emb_pmu_event_init()
549 	event->hw.config_base = PMLCA_CE | PMLCA_FCM1 |  in fsl_emb_pmu_event_init()
552 	if (event->attr.exclude_user)  in fsl_emb_pmu_event_init()
553 		event->hw.config_base |= PMLCA_FCU;  in fsl_emb_pmu_event_init()
554 	if (event->attr.exclude_kernel)  in fsl_emb_pmu_event_init()
555 		event->hw.config_base |= PMLCA_FCS;  in fsl_emb_pmu_event_init()
556 	if (event->attr.exclude_idle)  in fsl_emb_pmu_event_init()
559 	event->hw.last_period = event->hw.sample_period;  in fsl_emb_pmu_event_init()
560 	local64_set(&event->hw.period_left, event->hw.last_period);  in fsl_emb_pmu_event_init()
581 	event->destroy = hw_perf_event_destroy;  in fsl_emb_pmu_event_init()
602 static void record_and_restart(struct perf_event *event, unsigned long val,  in record_and_restart()  argument
605 	u64 period = event->hw.sample_period;  in record_and_restart()
609 	if (event->hw.state & PERF_HES_STOPPED) {  in record_and_restart()
610 		write_pmc(event->hw.idx, 0);  in record_and_restart()
615 	prev = local64_read(&event->hw.prev_count);  in record_and_restart()
617 	local64_add(delta, &event->count);  in record_and_restart()
620 	 * See if the total period for this event has expired,  in record_and_restart()
624 	left = local64_read(&event->hw.period_left) - delta;  in record_and_restart()
631 			event->hw.last_period = event->hw.sample_period;  in record_and_restart()
637 	write_pmc(event->hw.idx, val);  in record_and_restart()
638 	local64_set(&event->hw.prev_count, val);  in record_and_restart()
639 	local64_set(&event->hw.period_left, left);  in record_and_restart()
640 	perf_event_update_userpage(event);  in record_and_restart()
648 		perf_sample_data_init(&data, 0, event->hw.last_period);  in record_and_restart()
650 		if (perf_event_overflow(event, &data, regs))  in record_and_restart()
651 			fsl_emb_pmu_stop(event, 0);  in record_and_restart()
659 	struct perf_event *event;  in perf_event_interrupt()  local
671 		event = cpuhw->event[i];  in perf_event_interrupt()
675 			if (event) {  in perf_event_interrupt()
676 				/* event has overflowed */  in perf_event_interrupt()
678 				record_and_restart(event, val, regs);  in perf_event_interrupt()