This patch adds the support for PPMU (Platform Performance Monitoring Unit) version 2.0 for Exynos5433 SoC. Exynos5433 SoC must need PPMUv2 which is quite different from PPMUv1.1. The exynos-ppmu.c driver supports both PPMUv1.1 and PPMUv2.
Cc: MyungJoo Ham <[email protected]> Cc: Kyungmin Park <[email protected]> Signed-off-by: Chanwoo Choi <[email protected]> --- drivers/devfreq/event/exynos-ppmu.c | 168 ++++++++++++++++++++++++++++++++++-- drivers/devfreq/event/exynos-ppmu.h | 70 +++++++++++++++ 2 files changed, 231 insertions(+), 7 deletions(-) diff --git a/drivers/devfreq/event/exynos-ppmu.c b/drivers/devfreq/event/exynos-ppmu.c index 7d99d13bacd8..6066dc18fc73 100644 --- a/drivers/devfreq/event/exynos-ppmu.c +++ b/drivers/devfreq/event/exynos-ppmu.c @@ -1,7 +1,7 @@ /* * exynos_ppmu.c - EXYNOS PPMU (Platform Performance Monitoring Unit) support * - * Copyright (c) 2014 Samsung Electronics Co., Ltd. + * Copyright (c) 2014-2015 Samsung Electronics Co., Ltd. * Author : Chanwoo Choi <[email protected]> * * This program is free software; you can redistribute it and/or modify @@ -82,6 +82,15 @@ struct __exynos_ppmu_events { PPMU_EVENT(mscl), PPMU_EVENT(fimd0x), PPMU_EVENT(fimd1x), + + /* Only for Exynos5433 SoCs */ + PPMU_EVENT(d0-cpu), + PPMU_EVENT(d0-general), + PPMU_EVENT(d0-rt), + PPMU_EVENT(d1-cpu), + PPMU_EVENT(d1-general), + PPMU_EVENT(d1-rt), + { /* sentinel */ }, }; @@ -96,6 +105,9 @@ static int exynos_ppmu_find_ppmu_id(struct devfreq_event_dev *edev) return -EINVAL; } +/* + * The devfreq-event ops structure for PPMU v1.1 + */ static int exynos_ppmu_disable(struct devfreq_event_dev *edev) { struct exynos_ppmu *info = devfreq_event_get_drvdata(edev); @@ -200,6 +212,153 @@ static const struct devfreq_event_ops exynos_ppmu_ops = { .get_event = exynos_ppmu_get_event, }; +/* + * The devfreq-event ops structure for PPMU v2.0 + */ +static int exynos_ppmu_v2_disable(struct devfreq_event_dev *edev) +{ + struct exynos_ppmu *info = devfreq_event_get_drvdata(edev); + u32 pmnc, clear; + + /* Disable all counters */ + clear = (PPMU_CCNT_MASK | PPMU_PMCNT0_MASK | PPMU_PMCNT1_MASK + | PPMU_PMCNT2_MASK | PPMU_PMCNT3_MASK); + + __raw_writel(clear, info->ppmu.base + PPMUv2_FLAG); + __raw_writel(clear, info->ppmu.base + PPMUv2_INTENC); + __raw_writel(clear, info->ppmu.base + PPMUv2_CNTENC); + __raw_writel(clear, info->ppmu.base + PPMUv2_CNT_RESET); + + __raw_writel(0x0, info->ppmu.base + PPMUv2_CIG_CFG0); + __raw_writel(0x0, info->ppmu.base + PPMUv2_CIG_CFG1); + __raw_writel(0x0, info->ppmu.base + PPMUv2_CIG_CFG2); + __raw_writel(0x0, info->ppmu.base + PPMUv2_CIG_RESULT); + __raw_writel(0x0, info->ppmu.base + PPMUv2_CNT_AUTO); + __raw_writel(0x0, info->ppmu.base + PPMUv2_CH_EV0_TYPE); + __raw_writel(0x0, info->ppmu.base + PPMUv2_CH_EV1_TYPE); + __raw_writel(0x0, info->ppmu.base + PPMUv2_CH_EV2_TYPE); + __raw_writel(0x0, info->ppmu.base + PPMUv2_CH_EV3_TYPE); + __raw_writel(0x0, info->ppmu.base + PPMUv2_SM_ID_V); + __raw_writel(0x0, info->ppmu.base + PPMUv2_SM_ID_A); + __raw_writel(0x0, info->ppmu.base + PPMUv2_SM_OTHERS_V); + __raw_writel(0x0, info->ppmu.base + PPMUv2_SM_OTHERS_A); + __raw_writel(0x0, info->ppmu.base + PPMUv2_INTERRUPT_RESET); + + /* Disable PPMU */ + pmnc = __raw_readl(info->ppmu.base + PPMUv2_PMNC); + pmnc &= ~PPMU_PMNC_ENABLE_MASK; + __raw_writel(pmnc, info->ppmu.base + PPMUv2_PMNC); + + return 0; +} + +static int exynos_ppmu_v2_set_event(struct devfreq_event_dev *edev) +{ + struct exynos_ppmu *info = devfreq_event_get_drvdata(edev); + int id = exynos_ppmu_find_ppmu_id(edev); + u32 pmnc, cntens; + + /* Enable all counters */ + cntens = __raw_readl(info->ppmu.base + PPMUv2_CNTENS); + cntens |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id)); + __raw_writel(cntens, info->ppmu.base + PPMUv2_CNTENS); + + /* Set the event of Read/Write data count */ + switch (id) { + case PPMU_PMNCNT0: + case PPMU_PMNCNT1: + case PPMU_PMNCNT2: + __raw_writel(PPMUv2_RO_DATA_CNT | PPMUv2_WO_DATA_CNT, + info->ppmu.base + PPMUv2_CH_EVx_TYPE(id)); + break; + case PPMU_PMNCNT3: + __raw_writel(PPMUv2_EVT3_RW_DATA_CNT, + info->ppmu.base + PPMUv2_CH_EVx_TYPE(id)); + break; + } + + /* Reset cycle counter/performance counter and enable PPMU */ + pmnc = __raw_readl(info->ppmu.base + PPMUv2_PMNC); + pmnc &= ~(PPMU_PMNC_ENABLE_MASK + | PPMU_PMNC_COUNTER_RESET_MASK + | PPMU_PMNC_CC_RESET_MASK + | PPMU_PMNC_CC_DIVIDER_MASK + | PPMUv2_PMNC_START_MODE_MASK); + pmnc |= (PPMU_ENABLE << PPMU_PMNC_ENABLE_SHIFT); + pmnc |= (PPMU_ENABLE << PPMU_PMNC_COUNTER_RESET_SHIFT); + pmnc |= (PPMU_ENABLE << PPMU_PMNC_CC_RESET_SHIFT); + pmnc |= (PPMUv2_MODE_MANUAL << PPMUv2_PMNC_START_MODE_SHIFT); + __raw_writel(pmnc, info->ppmu.base + PPMUv2_PMNC); + + return 0; +} + +static int exynos_ppmu_v2_get_event(struct devfreq_event_dev *edev, + struct devfreq_event_data *edata) +{ + struct exynos_ppmu *info = devfreq_event_get_drvdata(edev); + int id = exynos_ppmu_find_ppmu_id(edev); + u32 pmnc, cntenc; + u32 pmcnt_high, pmcnt_low; + u64 load_count = 0; + + /* Disable PPMU */ + pmnc = __raw_readl(info->ppmu.base + PPMUv2_PMNC); + pmnc &= ~PPMU_PMNC_ENABLE_MASK; + __raw_writel(pmnc, info->ppmu.base + PPMUv2_PMNC); + + /* Read cycle count and performance count */ + edata->total_count = __raw_readl(info->ppmu.base + PPMUv2_CCNT); + + switch (id) { + case PPMU_PMNCNT0: + case PPMU_PMNCNT1: + case PPMU_PMNCNT2: + load_count = __raw_readl(info->ppmu.base + PPMUv2_PMNCT(id)); + break; + case PPMU_PMNCNT3: + pmcnt_high = __raw_readl(info->ppmu.base + PPMUv2_PMCNT3_HIGH); + pmcnt_low = __raw_readl(info->ppmu.base + PPMUv2_PMCNT3_LOW); + load_count = (u64)((pmcnt_high & 0xff) << 32) + (u64)pmcnt_low; + break; + } + edata->load_count = load_count; + + /* Disable all counters */ + cntenc = __raw_readl(info->ppmu.base + PPMUv2_CNTENC); + cntenc |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id)); + __raw_writel(cntenc, info->ppmu.base + PPMUv2_CNTENC); + + dev_dbg(&edev->dev, "%25s (load: %ld / %ld)\n", edev->desc->name, + edata->load_count, edata->total_count); + return 0; +} + +static struct devfreq_event_ops exynos_ppmu_v2_ops = { + .disable = exynos_ppmu_v2_disable, + .set_event = exynos_ppmu_v2_set_event, + .get_event = exynos_ppmu_v2_get_event, +}; + +static struct of_device_id exynos_ppmu_id_match[] = { + { + .compatible = "samsung,exynos-ppmu", + .data = (void *)&exynos_ppmu_ops, + }, { + .compatible = "samsung,exynos-ppmu-v2", + .data = (void *)&exynos_ppmu_v2_ops, + }, + { /* sentinel */ }, +}; + +static struct devfreq_event_ops *exynos_bus_get_ops(struct device_node *np) +{ + const struct of_device_id *match; + + match = of_match_node(exynos_ppmu_id_match, np); + return (struct devfreq_event_ops *)match->data; +} + static int of_get_devfreq_events(struct device_node *np, struct exynos_ppmu *info) { @@ -238,7 +397,7 @@ static int of_get_devfreq_events(struct device_node *np, continue; } - desc[j].ops = &exynos_ppmu_ops; + desc[j].ops = exynos_bus_get_ops(np); desc[j].driver_data = info; of_property_read_string(node, "event-name", &desc[j].name); @@ -354,11 +513,6 @@ static int exynos_ppmu_remove(struct platform_device *pdev) return 0; } -static struct of_device_id exynos_ppmu_id_match[] = { - { .compatible = "samsung,exynos-ppmu", }, - { /* sentinel */ }, -}; - static struct platform_driver exynos_ppmu_driver = { .probe = exynos_ppmu_probe, .remove = exynos_ppmu_remove, diff --git a/drivers/devfreq/event/exynos-ppmu.h b/drivers/devfreq/event/exynos-ppmu.h index 4e831d48c138..9a7cf6394f37 100644 --- a/drivers/devfreq/event/exynos-ppmu.h +++ b/drivers/devfreq/event/exynos-ppmu.h @@ -26,6 +26,9 @@ enum ppmu_counter { PPMU_PMNCNT_MAX, }; +/*** + * PPMUv1.1 Definitions + */ enum ppmu_event_type { PPMU_RO_BUSY_CYCLE_CNT = 0x0, PPMU_WO_BUSY_CYCLE_CNT = 0x1, @@ -90,4 +93,71 @@ enum ppmu_reg { #define PPMU_PMNCT(x) (PPMU_PMCNT0 + (0x10 * x)) #define PPMU_BEVTxSEL(x) (PPMU_BEVT0SEL + (0x100 * x)) +/*** + * PPMUv2.0 definitions + */ +enum ppmuv2_mode { + PPMUv2_MODE_MANUAL = 0, + PPMUv2_MODE_AUTO = 1, + PPMUv2_MODE_CIG = 2, /* CIG (Conditional Interrupt Generation) */ +}; + +enum ppmuv2_event_type { + PPMUv2_RO_DATA_CNT = 0x4, + PPMUv2_WO_DATA_CNT = 0x5, + + PPMUv2_EVT3_RW_DATA_CNT = 0x22, /* Only for Event3 */ +}; + +enum ppmuv2_reg { + /* PPC control register */ + PPMUv2_PMNC = 0x04, + PPMUv2_CNTENS = 0x08, + PPMUv2_CNTENC = 0x0c, + PPMUv2_INTENS = 0x10, + PPMUv2_INTENC = 0x14, + PPMUv2_FLAG = 0x18, + + /* Cycle Counter and Performance Event Counter Register */ + PPMUv2_CCNT = 0x48, + PPMUv2_PMCNT0 = 0x34, + PPMUv2_PMCNT1 = 0x38, + PPMUv2_PMCNT2 = 0x3c, + PPMUv2_PMCNT3_LOW = 0x40, + PPMUv2_PMCNT3_HIGH = 0x44, + + /* Bus Event Generator */ + PPMUv2_CIG_CFG0 = 0x1c, + PPMUv2_CIG_CFG1 = 0x20, + PPMUv2_CIG_CFG2 = 0x24, + PPMUv2_CIG_RESULT = 0x28, + PPMUv2_CNT_RESET = 0x2c, + PPMUv2_CNT_AUTO = 0x30, + PPMUv2_CH_EV0_TYPE = 0x200, + PPMUv2_CH_EV1_TYPE = 0x204, + PPMUv2_CH_EV2_TYPE = 0x208, + PPMUv2_CH_EV3_TYPE = 0x20c, + PPMUv2_SM_ID_V = 0x220, + PPMUv2_SM_ID_A = 0x224, + PPMUv2_SM_OTHERS_V = 0x228, + PPMUv2_SM_OTHERS_A = 0x22c, + PPMUv2_INTERRUPT_RESET = 0x260, +}; + +/* PMNC register */ +#define PPMUv2_PMNC_START_MODE_SHIFT 20 +#define PPMUv2_PMNC_START_MODE_MASK (0x3 << PPMUv2_PMNC_START_MODE_SHIFT) + +#define PPMU_PMNC_CC_RESET_SHIFT 2 +#define PPMU_PMNC_COUNTER_RESET_SHIFT 1 +#define PPMU_PMNC_ENABLE_SHIFT 0 +#define PPMU_PMNC_START_MODE_MASK BIT(16) +#define PPMU_PMNC_CC_DIVIDER_MASK BIT(3) +#define PPMU_PMNC_CC_RESET_MASK BIT(2) +#define PPMU_PMNC_COUNTER_RESET_MASK BIT(1) +#define PPMU_PMNC_ENABLE_MASK BIT(0) + +#define PPMUv2_PMNCT(x) (PPMUv2_PMCNT0 + (0x4 * x)) +#define PPMUv2_CH_EVx_TYPE(x) (PPMUv2_CH_EV0_TYPE + (0x4 * x)) + #endif /* __EXYNOS_PPMU_H__ */ -- 1.8.5.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
