hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IBC4SJ -------------------------------- The event configuration interface is added. The input events can be selected in HiSilicon uncore frequency. For example: echo L3C > /sys/class/devfreq/**/related_event Signed-off-by: Xiangwei Li <liwei728@huawei.com> --- drivers/devfreq/hisi_uncore_freq.c | 128 +++++++++++++++++++++++++++++ 1 file changed, 128 insertions(+) diff --git a/drivers/devfreq/hisi_uncore_freq.c b/drivers/devfreq/hisi_uncore_freq.c index 2eccc07a9cac..481923416166 100644 --- a/drivers/devfreq/hisi_uncore_freq.c +++ b/drivers/devfreq/hisi_uncore_freq.c @@ -20,6 +20,7 @@ #include <linux/pm_opp.h> #include <linux/property.h> #include <linux/topology.h> +#include <linux/devfreq-event.h> #include <acpi/pcc.h> @@ -28,6 +29,15 @@ /* Don't care OPP votlage, take 1V as default */ #define DEF_OPP_VOLT_UV 1000000 +#define RELATED_EVENT_MAX_CNT 4 +#define RELATED_EVENT_NAME_LEN 10 + +struct related_event { + char name[RELATED_EVENT_NAME_LEN]; + struct platform_device *pdev; + struct devfreq_event_dev *edev; +}; + struct hisi_uncore_freq { struct device *dev; struct mbox_client cl; @@ -40,6 +50,8 @@ struct hisi_uncore_freq { struct devfreq *devfreq; int related_package; struct cpumask related_cpus; + int related_event_cnt; + struct related_event related_events[RELATED_EVENT_MAX_CNT]; }; struct hisi_uncore_pcc_data { @@ -435,6 +447,115 @@ static ssize_t related_package_show(struct device *dev, } DEVICE_ATTR_RO(related_package); +static int creat_related_event(struct hisi_uncore_freq *uncore, char *name) +{ + int evt_id; + struct related_event *event; + char dev_name[RELATED_EVENT_NAME_LEN + 10]; + + evt_id = uncore->related_event_cnt; + event = &uncore->related_events[evt_id]; + + sprintf(dev_name, "%s-%s", "EVT-UNCORE", name); + event->pdev = platform_device_register_data( + uncore->dev, + dev_name, + uncore->related_package, + NULL, + 0); + if (IS_ERR(event->pdev)) + return PTR_ERR(event->pdev); + + event->edev = devfreq_event_get_edev_by_dev(&event->pdev->dev); + if (event->edev) { + dev_err(&event->pdev->dev, "devfreq event dev do not added\n"); + platform_device_unregister(event->pdev); + return -ENODEV; + } + + strncpy(event->name, name, strlen(name)); + + return 0; +} + +static void remove_related_event(struct hisi_uncore_freq *uncore) +{ + int i; + struct related_event *event; + + for (i = 0; i < uncore->related_event_cnt; ++i) { + event = &uncore->related_events[i]; + event->edev = NULL; + memset(event->name, 0, RELATED_EVENT_NAME_LEN); + platform_device_unregister(event->pdev); + } + + uncore->related_event_cnt = 0; + + return; +} + +static ssize_t related_events_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int err; + char *item; + u32 head, tail; + struct platform_device *pdev = to_platform_device(dev->parent); + struct hisi_uncore_freq *uncore = platform_get_drvdata(pdev); + + if (!buf) + return 0; + + remove_related_event(uncore); + + head = 0; + item = kcalloc(count + 1, sizeof(*item), GFP_KERNEL); + if (!item) + return -ENOMEM; + + while (uncore->related_event_cnt < RELATED_EVENT_MAX_CNT) { + while (head < count && isspace(buf[head])) + head++; + + if (!isalnum(buf[head])) + break; + + tail = head + 1; + while (tail < count && isalnum(buf[tail])) + tail++; + + strncpy(item, buf + head, tail - head); + item[tail - head] = '\0'; + head = tail; + + err = creat_related_event(uncore, item); + if (err) { + kfree(item); + return err; + } + uncore->related_event_cnt++; + } + + kfree(item); + return count; +} + +static ssize_t related_events_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int evt_id; + struct platform_device *pdev = to_platform_device(dev->parent); + struct hisi_uncore_freq *uncore = platform_get_drvdata(pdev); + + for (evt_id = 0; evt_id < uncore->related_event_cnt; ++evt_id) { + sprintf(buf, "%s %s", buf, uncore->related_events[evt_id].name); + } + return sprintf(buf, "%s\n", buf); +} +DEVICE_ATTR_RW(related_events); + static int hisi_uncore_probe(struct platform_device *pdev) { struct hisi_uncore_freq *uncore; @@ -483,6 +604,12 @@ static int hisi_uncore_probe(struct platform_device *pdev) goto err_free_opp; } + rc = device_create_file(&uncore->devfreq->dev, &dev_attr_related_events); + if (rc) { + dev_err(&pdev->dev, "Failed to create custom sysfs files\n"); + goto err_free_opp; + } + return 0; err_free_opp: @@ -501,6 +628,7 @@ static int hisi_uncore_remove(struct platform_device *pdev) hisi_uncore_remove_opp(uncore); hisi_uncore_free_pcc_chan(uncore); + remove_related_event(uncore); device_remove_file(&uncore->devfreq->dev, &dev_attr_related_cpus); device_remove_file(&uncore->devfreq->dev, &dev_attr_related_package); -- 2.25.1