linux-kernel - Re: [PATCH v3 2/6] perf: hisi: Add support for HiSilicon SoC uncore PMU driver

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Date:   Thu, 20 Jul 2017 22:16:02 +0800
From:   Zhangshaokun <zhangshaokun@...ilicon.com>
To:     Jonathan Cameron <Jonathan.Cameron@...wei.com>
CC:     <mark.rutland@....com>, <will.deacon@....com>,
        <linuxarm@...wei.com>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v3 2/6] perf: hisi: Add support for HiSilicon SoC uncore
 PMU driver


Hi Jonathan

On 2017/7/20 21:49, Jonathan Cameron wrote:
> On Thu, 20 Jul 2017 21:03:19 +0800
> Zhangshaokun <zhangshaokun@...ilicon.com> wrote:
> 
>> Hi Jonathan
>>
>> On 2017/7/19 17:19, Jonathan Cameron wrote:
>>> On Tue, 18 Jul 2017 15:59:55 +0800
>>> Shaokun Zhang <zhangshaokun@...ilicon.com> wrote:
>>>   
>>>> This patch adds support HiSilicon SoC uncore PMU driver framework and
>>>> interfaces.
>>>>
>>>> Signed-off-by: Shaokun Zhang <zhangshaokun@...ilicon.com>
>>>> Signed-off-by: Anurup M <anurup.m@...wei.com>    
>>> A couple of minor things inline.
>>>
> <snip>
>>>> +/* Generic pmu struct for different pmu types */
>>>> +struct hisi_pmu {
>>>> +	const char *name;
>>>> +	struct pmu pmu;
>>>> +	const struct hisi_uncore_ops *ops;
>>>> +	struct hisi_pmu_hwevents pmu_events;
>>>> +	cpumask_t cpus;
>>>> +	struct device *dev;
>>>> +	struct hlist_node node;
>>>> +	u32 scl_id;
>>>> +	u32 ccl_id;
>>>> +	/* Hardware information for different pmu types */
>>>> +	void __iomem *base;
>>>> +	union {
>>>> +		u32 ddrc_chn_id;
>>>> +		u32 l3c_tag_id;
>>>> +		u32 hha_uid;
>>>> +	};
>>>> +	int num_counters;
>>>> +	int num_events;
>>>> +	int counter_bits;
>>>> +};
>>>> +
>>>> +int hisi_uncore_pmu_counter_valid(struct hisi_pmu *hisi_pmu, int idx);
>>>> +int hisi_uncore_pmu_get_event_idx(struct perf_event *event);
>>>> +void hisi_uncore_pmu_clear_event_idx(struct hisi_pmu *hisi_pmu, int idx);    
>>> The above is only used in hisi_uncore_pmu.c so doesn't need to be here
>>> and can be static.
>>>   
>>
>> These functions would be called in L3C/HHA/DDR PMU driver. We want to give a
>> uncore perf framework in hisi_uncore_pmu.c for hisilicon uncore PMUs.
>>
> For all but the one function above that is true.  I couldn't find this one being
> used anywhere in those drivers.
> 

My apologies, it is what your said, thanks.

> 
>> Thanks.
>> Shaokun
>>
>>>> +void hisi_uncore_pmu_read(struct perf_event *event);
>>>> +int hisi_uncore_pmu_add(struct perf_event *event, int flags);
>>>> +void hisi_uncore_pmu_del(struct perf_event *event, int flags);
>>>> +void hisi_uncore_pmu_start(struct perf_event *event, int flags);
>>>> +void hisi_uncore_pmu_stop(struct perf_event *event, int flags);
>>>> +void hisi_uncore_pmu_set_event_period(struct perf_event *event);
>>>> +u64 hisi_uncore_pmu_event_update(struct perf_event *event);
>>>> +int hisi_uncore_pmu_event_init(struct perf_event *event);
>>>> +int hisi_uncore_pmu_setup(struct hisi_pmu *hisi_pmu, const char *pmu_name);
>>>> +void hisi_uncore_pmu_enable(struct pmu *pmu);
>>>> +void hisi_uncore_pmu_disable(struct pmu *pmu);
>>>> +struct hisi_pmu *hisi_pmu_alloc(struct device *dev, u32 num_cntrs);
>>>> +ssize_t hisi_event_sysfs_show(struct device *dev,
>>>> +			      struct device_attribute *attr, char *buf);
>>>> +ssize_t hisi_format_sysfs_show(struct device *dev,
>>>> +			       struct device_attribute *attr, char *buf);
>>>> +ssize_t hisi_cpumask_sysfs_show(struct device *dev,
>>>> +				struct device_attribute *attr, char *buf);
>>>> +void hisi_read_scl_and_ccl_id(u32 *scl_id, u32 *ccl_id);
>>>> +#endif /* __HISI_UNCORE_PMU_H__ */    
>>>
>>>
>>> .
>>>   
>>
> 
> 
> 
> .
>