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Date: Mon, 16 May 2022 16:32:07 +0100
From: John Garry <john.garry@...wei.com>
To: Chen Jun <chenjun102@...wei.com>, <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<zhangshaokun@...ilicon.com>, <will@...nel.org>,
<mark.rutland@....com>
CC: <xuqiang36@...wei.com>
Subject: Re: [PATCH 1/1] perf: hisi: Extract hisi_pmu_init
On 16/05/2022 14:16, Chen Jun wrote:
> Extract the initialization code of hisi_pmu->pmu into a function
>
> Signed-off-by: Chen Jun <chenjun102@...wei.com>
> ---
> drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c | 16 +---------------
> drivers/perf/hisilicon/hisi_uncore_hha_pmu.c | 16 +---------------
> drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c | 16 +---------------
> drivers/perf/hisilicon/hisi_uncore_pa_pmu.c | 16 +---------------
> drivers/perf/hisilicon/hisi_uncore_pmu.c | 18 ++++++++++++++++++
> drivers/perf/hisilicon/hisi_uncore_pmu.h | 2 ++
> drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c | 15 +--------------
> 7 files changed, 25 insertions(+), 74 deletions(-)
>
> diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
> index 62299ab5a9be..50d0c0a2f1fe 100644
> --- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
> +++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
> @@ -516,21 +516,7 @@ static int hisi_ddrc_pmu_probe(struct platform_device *pdev)
> "hisi_sccl%u_ddrc%u", ddrc_pmu->sccl_id,
> ddrc_pmu->index_id);
>
> - ddrc_pmu->pmu = (struct pmu) {
> - .name = name,
> - .module = THIS_MODULE,
> - .task_ctx_nr = perf_invalid_context,
> - .event_init = hisi_uncore_pmu_event_init,
> - .pmu_enable = hisi_uncore_pmu_enable,
> - .pmu_disable = hisi_uncore_pmu_disable,
> - .add = hisi_uncore_pmu_add,
> - .del = hisi_uncore_pmu_del,
> - .start = hisi_uncore_pmu_start,
> - .stop = hisi_uncore_pmu_stop,
> - .read = hisi_uncore_pmu_read,
> - .attr_groups = ddrc_pmu->pmu_events.attr_groups,
> - .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
> - };
> + hisi_pmu_init(&ddrc_pmu->pmu, name, ddrc_pmu->pmu_events.attr_groups, THIS_MODULE);
>
> ret = perf_pmu_register(&ddrc_pmu->pmu, name, -1);
> if (ret) {
> diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
> index 393513150106..13017b3412a5 100644
> --- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
> +++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
> @@ -519,21 +519,7 @@ static int hisi_hha_pmu_probe(struct platform_device *pdev)
>
> name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_hha%u",
> hha_pmu->sccl_id, hha_pmu->index_id);
> - hha_pmu->pmu = (struct pmu) {
> - .name = name,
> - .module = THIS_MODULE,
> - .task_ctx_nr = perf_invalid_context,
> - .event_init = hisi_uncore_pmu_event_init,
> - .pmu_enable = hisi_uncore_pmu_enable,
> - .pmu_disable = hisi_uncore_pmu_disable,
> - .add = hisi_uncore_pmu_add,
> - .del = hisi_uncore_pmu_del,
> - .start = hisi_uncore_pmu_start,
> - .stop = hisi_uncore_pmu_stop,
> - .read = hisi_uncore_pmu_read,
> - .attr_groups = hha_pmu->pmu_events.attr_groups,
> - .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
> - };
> + hisi_pmu_init(&hha_pmu->pmu, name, hha_pmu->pmu_events.attr_groups, THIS_MODULE);
>
> ret = perf_pmu_register(&hha_pmu->pmu, name, -1);
> if (ret) {
> diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
> index 560ab964c8b5..2995f3630d49 100644
> --- a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
> +++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
> @@ -557,21 +557,7 @@ static int hisi_l3c_pmu_probe(struct platform_device *pdev)
> */
> name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_l3c%u",
> l3c_pmu->sccl_id, l3c_pmu->ccl_id);
> - l3c_pmu->pmu = (struct pmu) {
> - .name = name,
> - .module = THIS_MODULE,
> - .task_ctx_nr = perf_invalid_context,
> - .event_init = hisi_uncore_pmu_event_init,
> - .pmu_enable = hisi_uncore_pmu_enable,
> - .pmu_disable = hisi_uncore_pmu_disable,
> - .add = hisi_uncore_pmu_add,
> - .del = hisi_uncore_pmu_del,
> - .start = hisi_uncore_pmu_start,
> - .stop = hisi_uncore_pmu_stop,
> - .read = hisi_uncore_pmu_read,
> - .attr_groups = l3c_pmu->pmu_events.attr_groups,
> - .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
> - };
> + hisi_pmu_init(&l3c_pmu->pmu, name, l3c_pmu->pmu_events.attr_groups, THIS_MODULE);
>
why not just pass l3c_pmu and extract the info there?
We always seem to be dealing with type struct hisi_pmu * AFAICS.
> ret = perf_pmu_register(&l3c_pmu->pmu, name, -1);
> if (ret) {
> diff --git a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
> index bad99d149172..2103fb5ee7bb 100644
> --- a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
> +++ b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
> @@ -416,21 +416,7 @@ static int hisi_pa_pmu_probe(struct platform_device *pdev)
> return ret;
> }
>
> - pa_pmu->pmu = (struct pmu) {
> - .module = THIS_MODULE,
> - .task_ctx_nr = perf_invalid_context,
> - .event_init = hisi_uncore_pmu_event_init,
> - .pmu_enable = hisi_uncore_pmu_enable,
> - .pmu_disable = hisi_uncore_pmu_disable,
> - .add = hisi_uncore_pmu_add,
> - .del = hisi_uncore_pmu_del,
> - .start = hisi_uncore_pmu_start,
> - .stop = hisi_uncore_pmu_stop,
> - .read = hisi_uncore_pmu_read,
> - .attr_groups = pa_pmu->pmu_events.attr_groups,
> - .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
> - };
> -
> + hisi_pmu_init(&pa_pmu->pmu, name, pa_pmu->pmu_events.attr_groups, THIS_MODULE);
> ret = perf_pmu_register(&pa_pmu->pmu, name, -1);
> if (ret) {
> dev_err(pa_pmu->dev, "PMU register failed, ret = %d\n", ret);
> diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
> index 358e4e284a62..5dd2694dbdf8 100644
> --- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
> +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
> @@ -527,4 +527,22 @@ int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
> }
> EXPORT_SYMBOL_GPL(hisi_uncore_pmu_offline_cpu);
>
> +void hisi_pmu_init(struct pmu *pmu, const char *name,
> + const struct attribute_group **attr_groups, struct module *module)
> +{
> + pmu->name = name;
> + pmu->module = module;
> + pmu->task_ctx_nr = perf_invalid_context;
> + pmu->event_init = hisi_uncore_pmu_event_init;
> + pmu->pmu_enable = hisi_uncore_pmu_enable;
> + pmu->pmu_disable = hisi_uncore_pmu_disable;
> + pmu->add = hisi_uncore_pmu_add;
> + pmu->del = hisi_uncore_pmu_del;
> + pmu->start = hisi_uncore_pmu_start;
> + pmu->stop = hisi_uncore_pmu_stop;
> + pmu->read = hisi_uncore_pmu_read;
> + pmu->attr_groups = attr_groups;
> +}
> +EXPORT_SYMBOL_GPL(hisi_pmu_init);
> +
> MODULE_LICENSE("GPL v2");
> diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisilicon/hisi_uncore_pmu.h
> index 7f5841d6f592..6e2523e4aa36 100644
> --- a/drivers/perf/hisilicon/hisi_uncore_pmu.h
> +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.h
> @@ -120,4 +120,6 @@ ssize_t hisi_uncore_pmu_identifier_attr_show(struct device *dev,
> int hisi_uncore_pmu_init_irq(struct hisi_pmu *hisi_pmu,
> struct platform_device *pdev);
>
> +void hisi_pmu_init(struct pmu *pmu, const char *name,
> + const struct attribute_group **attr_groups, struct module *module);
> #endif /* __HISI_UNCORE_PMU_H__ */
> diff --git a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
> index 6aedc303ff56..b9c79f17230c 100644
> --- a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
> +++ b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
> @@ -445,20 +445,7 @@ static int hisi_sllc_pmu_probe(struct platform_device *pdev)
> return ret;
> }
>
> - sllc_pmu->pmu = (struct pmu) {
> - .module = THIS_MODULE,
> - .task_ctx_nr = perf_invalid_context,
> - .event_init = hisi_uncore_pmu_event_init,
> - .pmu_enable = hisi_uncore_pmu_enable,
> - .pmu_disable = hisi_uncore_pmu_disable,
> - .add = hisi_uncore_pmu_add,
> - .del = hisi_uncore_pmu_del,
> - .start = hisi_uncore_pmu_start,
> - .stop = hisi_uncore_pmu_stop,
> - .read = hisi_uncore_pmu_read,
> - .attr_groups = sllc_pmu->pmu_events.attr_groups,
> - .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
> - };
> + hisi_pmu_init(&sllc_pmu->pmu, name, sllc_pmu->pmu_events.attr_groups, THIS_MODULE);
>
> ret = perf_pmu_register(&sllc_pmu->pmu, name, -1);
why not make hisi_pmu_init() do the perf_pmu_register() call as well?
That seems the common pattern.
> if (ret) {
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