linux-kernel - RE: [PATCH v2 7/9] drivers/perf: Remove redundant macro and functions in fsl_imx8_ddr

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Date:   Wed, 19 May 2021 14:36:18 +0000
From:   Frank Li <frank.li@....com>
To:     Qi Liu <liuqi115@...wei.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "linuxarm@...wei.com" <linuxarm@...wei.com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: RE: [PATCH v2 7/9] drivers/perf: Remove redundant macro and functions
 in  fsl_imx8_ddr_perf.c



> -----Original Message-----
> From: Qi Liu <liuqi115@...wei.com>
> Sent: Wednesday, May 19, 2021 4:52 AM
> To: linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org
> Cc: linuxarm@...wei.com; Frank Li <frank.li@....com>; Will Deacon
> <will@...nel.org>; Mark Rutland <mark.rutland@....com>
> Subject: [PATCH v2 7/9] drivers/perf: Remove redundant macro and
> functions in fsl_imx8_ddr_perf.c
> 
> Remove IMX8_DDR_PMU_EVENT_ATTR and ddr_pmu_event_show(), as
> there is a general function for this.
> 

Reviewed by Frank Li <Frank .li@....com>

> Cc: Frank Li <Frank.li@....com>
> Cc: Will Deacon <will@...nel.org>
> Cc: Mark Rutland <mark.rutland@....com>
> Signed-off-by: Qi Liu <liuqi115@...wei.com>
> ---
>  drivers/perf/fsl_imx8_ddr_perf.c | 80 ++++++++++++++++------------------------
>  1 file changed, 32 insertions(+), 48 deletions(-)
> 
> diff --git a/drivers/perf/fsl_imx8_ddr_perf.c
> b/drivers/perf/fsl_imx8_ddr_perf.c
> index 2bbb931..8f2c4dd 100644
> --- a/drivers/perf/fsl_imx8_ddr_perf.c
> +++ b/drivers/perf/fsl_imx8_ddr_perf.c
> @@ -212,55 +212,39 @@ static const struct attribute_group
> ddr_perf_cpumask_attr_group = {
>  	.attrs = ddr_perf_cpumask_attrs,
>  };
> 
> -static ssize_t
> -ddr_pmu_event_show(struct device *dev, struct device_attribute *attr,
> -		   char *page)
> -{
> -	struct perf_pmu_events_attr *pmu_attr;
> -
> -	pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr);
> -	return sysfs_emit(page, "event=0x%02llx\n", pmu_attr->id);
> -}
> -
> -#define IMX8_DDR_PMU_EVENT_ATTR(_name, _id)
> 	\
> -	(&((struct perf_pmu_events_attr[]) {				\
> -		{ .attr = __ATTR(_name, 0444, ddr_pmu_event_show,
> NULL),\
> -		  .id = _id, }						\
> -	})[0].attr.attr)
> -
>  static struct attribute *ddr_perf_events_attrs[] = {
> -	IMX8_DDR_PMU_EVENT_ATTR(cycles, EVENT_CYCLES_ID),
> -	IMX8_DDR_PMU_EVENT_ATTR(selfresh, 0x01),
> -	IMX8_DDR_PMU_EVENT_ATTR(read-accesses, 0x04),
> -	IMX8_DDR_PMU_EVENT_ATTR(write-accesses, 0x05),
> -	IMX8_DDR_PMU_EVENT_ATTR(read-queue-depth, 0x08),
> -	IMX8_DDR_PMU_EVENT_ATTR(write-queue-depth, 0x09),
> -	IMX8_DDR_PMU_EVENT_ATTR(lp-read-credit-cnt, 0x10),
> -	IMX8_DDR_PMU_EVENT_ATTR(hp-read-credit-cnt, 0x11),
> -	IMX8_DDR_PMU_EVENT_ATTR(write-credit-cnt, 0x12),
> -	IMX8_DDR_PMU_EVENT_ATTR(read-command, 0x20),
> -	IMX8_DDR_PMU_EVENT_ATTR(write-command, 0x21),
> -	IMX8_DDR_PMU_EVENT_ATTR(read-modify-write-command, 0x22),
> -	IMX8_DDR_PMU_EVENT_ATTR(hp-read, 0x23),
> -	IMX8_DDR_PMU_EVENT_ATTR(hp-req-nocredit, 0x24),
> -	IMX8_DDR_PMU_EVENT_ATTR(hp-xact-credit, 0x25),
> -	IMX8_DDR_PMU_EVENT_ATTR(lp-req-nocredit, 0x26),
> -	IMX8_DDR_PMU_EVENT_ATTR(lp-xact-credit, 0x27),
> -	IMX8_DDR_PMU_EVENT_ATTR(wr-xact-credit, 0x29),
> -	IMX8_DDR_PMU_EVENT_ATTR(read-cycles, 0x2a),
> -	IMX8_DDR_PMU_EVENT_ATTR(write-cycles, 0x2b),
> -	IMX8_DDR_PMU_EVENT_ATTR(read-write-transition, 0x30),
> -	IMX8_DDR_PMU_EVENT_ATTR(precharge, 0x31),
> -	IMX8_DDR_PMU_EVENT_ATTR(activate, 0x32),
> -	IMX8_DDR_PMU_EVENT_ATTR(load-mode, 0x33),
> -	IMX8_DDR_PMU_EVENT_ATTR(perf-mwr, 0x34),
> -	IMX8_DDR_PMU_EVENT_ATTR(read, 0x35),
> -	IMX8_DDR_PMU_EVENT_ATTR(read-activate, 0x36),
> -	IMX8_DDR_PMU_EVENT_ATTR(refresh, 0x37),
> -	IMX8_DDR_PMU_EVENT_ATTR(write, 0x38),
> -	IMX8_DDR_PMU_EVENT_ATTR(raw-hazard, 0x39),
> -	IMX8_DDR_PMU_EVENT_ATTR(axid-read, 0x41),
> -	IMX8_DDR_PMU_EVENT_ATTR(axid-write, 0x42),
> +	PMU_EVENT_ATTR_ID(cycles, EVENT_CYCLES_ID),
> +	PMU_EVENT_ATTR_ID(selfresh, 0x01),
> +	PMU_EVENT_ATTR_ID(read-accesses, 0x04),
> +	PMU_EVENT_ATTR_ID(write-accesses, 0x05),
> +	PMU_EVENT_ATTR_ID(read-queue-depth, 0x08),
> +	PMU_EVENT_ATTR_ID(write-queue-depth, 0x09),
> +	PMU_EVENT_ATTR_ID(lp-read-credit-cnt, 0x10),
> +	PMU_EVENT_ATTR_ID(hp-read-credit-cnt, 0x11),
> +	PMU_EVENT_ATTR_ID(write-credit-cnt, 0x12),
> +	PMU_EVENT_ATTR_ID(read-command, 0x20),
> +	PMU_EVENT_ATTR_ID(write-command, 0x21),
> +	PMU_EVENT_ATTR_ID(read-modify-write-command, 0x22),
> +	PMU_EVENT_ATTR_ID(hp-read, 0x23),
> +	PMU_EVENT_ATTR_ID(hp-req-nocredit, 0x24),
> +	PMU_EVENT_ATTR_ID(hp-xact-credit, 0x25),
> +	PMU_EVENT_ATTR_ID(lp-req-nocredit, 0x26),
> +	PMU_EVENT_ATTR_ID(lp-xact-credit, 0x27),
> +	PMU_EVENT_ATTR_ID(wr-xact-credit, 0x29),
> +	PMU_EVENT_ATTR_ID(read-cycles, 0x2a),
> +	PMU_EVENT_ATTR_ID(write-cycles, 0x2b),
> +	PMU_EVENT_ATTR_ID(read-write-transition, 0x30),
> +	PMU_EVENT_ATTR_ID(precharge, 0x31),
> +	PMU_EVENT_ATTR_ID(activate, 0x32),
> +	PMU_EVENT_ATTR_ID(load-mode, 0x33),
> +	PMU_EVENT_ATTR_ID(perf-mwr, 0x34),
> +	PMU_EVENT_ATTR_ID(read, 0x35),
> +	PMU_EVENT_ATTR_ID(read-activate, 0x36),
> +	PMU_EVENT_ATTR_ID(refresh, 0x37),
> +	PMU_EVENT_ATTR_ID(write, 0x38),
> +	PMU_EVENT_ATTR_ID(raw-hazard, 0x39),
> +	PMU_EVENT_ATTR_ID(axid-read, 0x41),
> +	PMU_EVENT_ATTR_ID(axid-write, 0x42),
>  	NULL,
>  };
> 
> --
> 2.7.4