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Date: Wed, 7 Apr 2021 21:53:29 +0800
From: kernel test robot <lkp@...el.com>
To: Qi Liu <liuqi115@...wei.com>, will@...nel.org, mark.rutland@....com
Cc: kbuild-all@...ts.01.org, zhangshaokun@...ilicon.com,
linuxarm@...wei.com, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] drivers/perf: hisi: Add driver for HiSilicon PCIe PMU
Hi Qi,
I love your patch! Perhaps something to improve:
[auto build test WARNING on linus/master]
[also build test WARNING on v5.12-rc6]
[cannot apply to next-20210407]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Qi-Liu/drivers-perf-hisi-Add-support-for-PCIe-PMU/20210407-175356
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 2d743660786ec51f5c1fefd5782bbdee7b227db0
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/32d06137b5ddb94f1e951d1252994e7178fe5e8e
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Qi-Liu/drivers-perf-hisi-Add-support-for-PCIe-PMU/20210407-175356
git checkout 32d06137b5ddb94f1e951d1252994e7178fe5e8e
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> drivers/perf/pci/hisilicon/hisi_pcie_pmu.c:447:6: warning: no previous prototype for 'hisi_pcie_pmu_read' [-Wmissing-prototypes]
447 | void hisi_pcie_pmu_read(struct perf_event *event)
| ^~~~~~~~~~~~~~~~~~
>> drivers/perf/pci/hisilicon/hisi_pcie_pmu.c:530:6: warning: no previous prototype for 'hisi_pcie_pmu_start' [-Wmissing-prototypes]
530 | void hisi_pcie_pmu_start(struct perf_event *event, int flags)
| ^~~~~~~~~~~~~~~~~~~
>> drivers/perf/pci/hisilicon/hisi_pcie_pmu.c:558:6: warning: no previous prototype for 'hisi_pcie_pmu_stop' [-Wmissing-prototypes]
558 | void hisi_pcie_pmu_stop(struct perf_event *event, int flags)
| ^~~~~~~~~~~~~~~~~~
>> drivers/perf/pci/hisilicon/hisi_pcie_pmu.c:577:5: warning: no previous prototype for 'hisi_pcie_pmu_add' [-Wmissing-prototypes]
577 | int hisi_pcie_pmu_add(struct perf_event *event, int flags)
| ^~~~~~~~~~~~~~~~~
>> drivers/perf/pci/hisilicon/hisi_pcie_pmu.c:600:6: warning: no previous prototype for 'hisi_pcie_pmu_del' [-Wmissing-prototypes]
600 | void hisi_pcie_pmu_del(struct perf_event *event, int flags)
| ^~~~~~~~~~~~~~~~~
>> drivers/perf/pci/hisilicon/hisi_pcie_pmu.c:610:6: warning: no previous prototype for 'hisi_pcie_pmu_enable' [-Wmissing-prototypes]
610 | void hisi_pcie_pmu_enable(struct pmu *pmu)
| ^~~~~~~~~~~~~~~~~~~~
>> drivers/perf/pci/hisilicon/hisi_pcie_pmu.c:626:6: warning: no previous prototype for 'hisi_pcie_pmu_disable' [-Wmissing-prototypes]
626 | void hisi_pcie_pmu_disable(struct pmu *pmu)
| ^~~~~~~~~~~~~~~~~~~~~
vim +/hisi_pcie_pmu_read +447 drivers/perf/pci/hisilicon/hisi_pcie_pmu.c
446
> 447 void hisi_pcie_pmu_read(struct perf_event *event)
448 {
449 struct hw_perf_event *hwc = &event->hw;
450 struct hw_perf_event_extra *hwc_ext = &hwc->extra_reg;
451 u64 new_cnt_ext, prev_cnt_ext;
452 u64 new_cnt, prev_cnt, delta;
453
454 hwc_ext = &hwc->extra_reg;
455 do {
456 prev_cnt = local64_read(&hwc->prev_count);
457 prev_cnt_ext = hwc_ext->config;
458 hisi_pcie_pmu_read_counter(event, &new_cnt, &new_cnt_ext);
459 } while (local64_cmpxchg(&hwc->prev_count, prev_cnt,
460 new_cnt) != prev_cnt);
461
462 hwc_ext->config = new_cnt_ext;
463
464 delta = hisi_pcie_pmu_process_data(event, new_cnt - prev_cnt,
465 new_cnt_ext - prev_cnt_ext);
466 local64_add(delta, &event->count);
467 }
468
469 static void hisi_pcie_pmu_set_period(struct perf_event *event)
470 {
471 struct hw_perf_event *hwc = &event->hw;
472 struct hw_perf_event_extra *hwc_ext;
473 u64 val = BIT_ULL(HISI_PCIE_COUNTER_BITS - 1);
474
475 hwc_ext = &hwc->extra_reg;
476 local64_set(&hwc->prev_count, val);
477 hwc_ext->config = 0;
478 hisi_pcie_pmu_write_counter(event, val, 0);
479 }
480
481 static void hisi_pcie_pmu_enable_counter(struct hisi_pcie_pmu *pcie_pmu,
482 struct hw_perf_event *hwc)
483 {
484 u32 idx = hwc->idx;
485 u64 val;
486
487 val = hisi_pcie_pmu_readq(pcie_pmu, HISI_PCIE_EVENT_CTRL, idx);
488 val |= HISI_PCIE_EVENT_EN;
489 hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EVENT_CTRL, idx, val);
490 }
491
492 static void hisi_pcie_pmu_disable_counter(struct hisi_pcie_pmu *pcie_pmu,
493 struct hw_perf_event *hwc)
494 {
495 u32 idx = hwc->idx;
496 u64 val;
497
498 val = hisi_pcie_pmu_readq(pcie_pmu, HISI_PCIE_EVENT_CTRL, idx);
499 val &= ~HISI_PCIE_EVENT_EN;
500 hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EVENT_CTRL, idx, val);
501 }
502
503 static void hisi_pcie_pmu_enable_int(struct hisi_pcie_pmu *pcie_pmu,
504 struct hw_perf_event *hwc)
505 {
506 u32 idx = hwc->idx;
507
508 hisi_pcie_pmu_writel(pcie_pmu, HISI_PCIE_INT_MASK, idx, 0);
509 }
510
511 static void hisi_pcie_pmu_disable_int(struct hisi_pcie_pmu *pcie_pmu,
512 struct hw_perf_event *hwc)
513 {
514 u32 idx = hwc->idx;
515
516 hisi_pcie_pmu_writel(pcie_pmu, HISI_PCIE_INT_MASK, idx, 1);
517 }
518
519 static void hisi_pcie_pmu_reset_counter(struct hisi_pcie_pmu *pcie_pmu,
520 struct hw_perf_event *hwc)
521 {
522 u32 idx = hwc->idx;
523
524 hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EVENT_CTRL, idx,
525 HISI_PCIE_RESET_CNT);
526 hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EVENT_CTRL, idx,
527 HISI_PCIE_DEFAULT_SET);
528 }
529
> 530 void hisi_pcie_pmu_start(struct perf_event *event, int flags)
531 {
532 struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu);
533 struct hw_perf_event *hwc = &event->hw;
534 struct hw_perf_event_extra *hwc_ext;
535 u64 prev_cnt, prev_cnt_ext;
536
537 hwc_ext = &hwc->extra_reg;
538 if (WARN_ON_ONCE(!(hwc->state & PERF_HES_STOPPED)))
539 return;
540
541 WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
542 hwc->state = 0;
543
544 hisi_pcie_pmu_config_filter(event);
545 hisi_pcie_pmu_enable_counter(pcie_pmu, hwc);
546 hisi_pcie_pmu_enable_int(pcie_pmu, hwc);
547 hisi_pcie_pmu_set_period(event);
548
549 if (flags & PERF_EF_RELOAD) {
550 prev_cnt = local64_read(&hwc->prev_count);
551 prev_cnt_ext = hwc_ext->config;
552 hisi_pcie_pmu_write_counter(event, prev_cnt, prev_cnt_ext);
553 }
554
555 perf_event_update_userpage(event);
556 }
557
> 558 void hisi_pcie_pmu_stop(struct perf_event *event, int flags)
559 {
560 struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu);
561 struct hw_perf_event *hwc = &event->hw;
562
563 hisi_pcie_pmu_read(event);
564 hisi_pcie_pmu_disable_int(pcie_pmu, hwc);
565 hisi_pcie_pmu_disable_counter(pcie_pmu, hwc);
566 hisi_pcie_pmu_clear_filter(event);
567 WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED);
568 hwc->state |= PERF_HES_STOPPED;
569
570 if (hwc->state & PERF_HES_UPTODATE)
571 return;
572
573
574 hwc->state |= PERF_HES_UPTODATE;
575 }
576
> 577 int hisi_pcie_pmu_add(struct perf_event *event, int flags)
578 {
579 struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu);
580 struct hw_perf_event *hwc = &event->hw;
581 int idx;
582
583 hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
584 idx = hisi_pcie_pmu_get_event_idx(pcie_pmu);
585 if (idx < 0)
586 return idx;
587
588 hwc->idx = idx;
589 pcie_pmu->hw_events[idx] = event;
590
591 /* Reset PMC to avoid interference caused by previous statistic. */
592 hisi_pcie_pmu_reset_counter(pcie_pmu, hwc);
593
594 if (flags & PERF_EF_START)
595 hisi_pcie_pmu_start(event, PERF_EF_RELOAD);
596
597 return 0;
598 }
599
> 600 void hisi_pcie_pmu_del(struct perf_event *event, int flags)
601 {
602 struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu);
603 struct hw_perf_event *hwc = &event->hw;
604
605 hisi_pcie_pmu_stop(event, PERF_EF_UPDATE);
606 pcie_pmu->hw_events[hwc->idx] = NULL;
607 perf_event_update_userpage(event);
608 }
609
> 610 void hisi_pcie_pmu_enable(struct pmu *pmu)
611 {
612 struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(pmu);
613 int num;
614
615 for (num = 0; num < HISI_PCIE_MAX_COUNTERS; num++) {
616 if (pcie_pmu->hw_events[num])
617 break;
618 }
619
620 if (num == HISI_PCIE_MAX_COUNTERS)
621 return;
622
623 writel(HISI_PCIE_GLOBAL_EN, pcie_pmu->base + HISI_PCIE_GLOBAL_CTRL);
624 }
625
> 626 void hisi_pcie_pmu_disable(struct pmu *pmu)
627 {
628 struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(pmu);
629
630 writel(HISI_PCIE_GLOBAL_NONE, pcie_pmu->base + HISI_PCIE_GLOBAL_CTRL);
631 }
632
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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