linux-kernel - Re: [PATCH 1/7] drivers/perf: hisi_pcie: Introduce hisi_pcie_pmu_get

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Date: Thu, 8 Feb 2024 12:06:43 +0000
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Yicong Yang <yangyicong@...wei.com>
CC: <will@...nel.org>, <mark.rutland@....com>, <hejunhao3@...wei.com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<yangyicong@...ilicon.com>, <linuxarm@...wei.com>,
	<prime.zeng@...ilicon.com>, <fanghao11@...wei.com>
Subject: Re: [PATCH 1/7] drivers/perf: hisi_pcie: Introduce
 hisi_pcie_pmu_get_filter()

On Sun, 4 Feb 2024 15:45:21 +0800
Yicong Yang <yangyicong@...wei.com> wrote:

> From: Yicong Yang <yangyicong@...ilicon.com>
> 
> Factor out retrieving of the register value for the
> corresponding event from hisi_pcie_config_filter() into a
> new function hisi_pcie_pmu_get_filter() allowing future reuse.
> 
> Signed-off-by: Yicong Yang <yangyicong@...ilicon.com>

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> ---
>  drivers/perf/hisilicon/hisi_pcie_pmu.c | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/perf/hisilicon/hisi_pcie_pmu.c b/drivers/perf/hisilicon/hisi_pcie_pmu.c
> index b90ba8aca3fa..11a819cd07f2 100644
> --- a/drivers/perf/hisilicon/hisi_pcie_pmu.c
> +++ b/drivers/perf/hisilicon/hisi_pcie_pmu.c
> @@ -216,10 +216,8 @@ static void hisi_pcie_pmu_writeq(struct hisi_pcie_pmu *pcie_pmu, u32 reg_offset,
>  	writeq_relaxed(val, pcie_pmu->base + offset);
>  }
>  
> -static void hisi_pcie_pmu_config_filter(struct perf_event *event)
> +static u64 hisi_pcie_pmu_get_filter(struct perf_event *event)
>  {
> -	struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu);
> -	struct hw_perf_event *hwc = &event->hw;
>  	u64 port, trig_len, thr_len, len_mode;
>  	u64 reg = HISI_PCIE_INIT_SET;
>  
> @@ -256,6 +254,15 @@ static void hisi_pcie_pmu_config_filter(struct perf_event *event)
>  	else
>  		reg |= FIELD_PREP(HISI_PCIE_LEN_M, HISI_PCIE_LEN_M_DEFAULT);
>  
> +	return reg;
> +}
> +
> +static void hisi_pcie_pmu_config_filter(struct perf_event *event)
> +{
> +	struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu);
> +	struct hw_perf_event *hwc = &event->hw;
> +	u64 reg = hisi_pcie_pmu_get_filter(event);
> +
>  	hisi_pcie_pmu_writeq(pcie_pmu, HISI_PCIE_EVENT_CTRL, hwc->idx, reg);
>  }
>