| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Chanwoo Choi | 2973 | 91.17% | 5 | 26.32% |
| Lukasz Luba | 215 | 6.59% | 3 | 15.79% |
| Arnd Bergmann | 31 | 0.95% | 1 | 5.26% |
| Arvind Yadav | 21 | 0.64% | 1 | 5.26% |
| Javier Martinez Canillas | 7 | 0.21% | 1 | 5.26% |
| MyungJoo Ham | 3 | 0.09% | 1 | 5.26% |
| Dan Carpenter | 3 | 0.09% | 1 | 5.26% |
| Kees Cook | 3 | 0.09% | 1 | 5.26% |
| Krzysztof Kozlowski | 2 | 0.06% | 2 | 10.53% |
| Rob Herring | 2 | 0.06% | 2 | 10.53% |
| Thomas Gleixner | 1 | 0.03% | 1 | 5.26% |
| Total | 3261 | 19 |
// SPDX-License-Identifier: GPL-2.0-only /* * exynos_ppmu.c - Exynos PPMU (Platform Performance Monitoring Unit) support * * Copyright (c) 2014-2015 Samsung Electronics Co., Ltd. * Author : Chanwoo Choi <cw00.choi@samsung.com> * * This driver is based on drivers/devfreq/exynos/exynos_ppmu.c */ #include <linux/clk.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of_address.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/suspend.h> #include <linux/devfreq-event.h> #include "exynos-ppmu.h" enum exynos_ppmu_type { EXYNOS_TYPE_PPMU, EXYNOS_TYPE_PPMU_V2, }; struct exynos_ppmu_data { struct clk *clk; }; struct exynos_ppmu { struct devfreq_event_dev **edev; struct devfreq_event_desc *desc; unsigned int num_events; struct device *dev; struct regmap *regmap; struct exynos_ppmu_data ppmu; enum exynos_ppmu_type ppmu_type; }; #define PPMU_EVENT(name) \ { "ppmu-event0-"#name, PPMU_PMNCNT0 }, \ { "ppmu-event1-"#name, PPMU_PMNCNT1 }, \ { "ppmu-event2-"#name, PPMU_PMNCNT2 }, \ { "ppmu-event3-"#name, PPMU_PMNCNT3 } static struct __exynos_ppmu_events { char *name; int id; } ppmu_events[] = { /* For Exynos3250, Exynos4 and Exynos5260 */ PPMU_EVENT(g3d), PPMU_EVENT(fsys), /* For Exynos4 SoCs and Exynos3250 */ PPMU_EVENT(dmc0), PPMU_EVENT(dmc1), PPMU_EVENT(cpu), PPMU_EVENT(rightbus), PPMU_EVENT(leftbus), PPMU_EVENT(lcd0), PPMU_EVENT(camif), /* Only for Exynos3250 and Exynos5260 */ PPMU_EVENT(mfc), /* Only for Exynos4 SoCs */ PPMU_EVENT(mfc-left), PPMU_EVENT(mfc-right), /* Only for Exynos5260 SoCs */ PPMU_EVENT(drex0-s0), PPMU_EVENT(drex0-s1), PPMU_EVENT(drex1-s0), PPMU_EVENT(drex1-s1), PPMU_EVENT(eagle), PPMU_EVENT(kfc), PPMU_EVENT(isp), PPMU_EVENT(fimc), PPMU_EVENT(gscl), 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), /* For Exynos5422 SoC */ PPMU_EVENT(dmc0_0), PPMU_EVENT(dmc0_1), PPMU_EVENT(dmc1_0), PPMU_EVENT(dmc1_1), }; static int __exynos_ppmu_find_ppmu_id(const char *edev_name) { int i; for (i = 0; i < ARRAY_SIZE(ppmu_events); i++) if (!strcmp(edev_name, ppmu_events[i].name)) return ppmu_events[i].id; return -EINVAL; } static int exynos_ppmu_find_ppmu_id(struct devfreq_event_dev *edev) { return __exynos_ppmu_find_ppmu_id(edev->desc->name); } /* * 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); int ret; u32 pmnc; /* Disable all counters */ ret = regmap_write(info->regmap, PPMU_CNTENC, PPMU_CCNT_MASK | PPMU_PMCNT0_MASK | PPMU_PMCNT1_MASK | PPMU_PMCNT2_MASK | PPMU_PMCNT3_MASK); if (ret < 0) return ret; /* Disable PPMU */ ret = regmap_read(info->regmap, PPMU_PMNC, &pmnc); if (ret < 0) return ret; pmnc &= ~PPMU_PMNC_ENABLE_MASK; ret = regmap_write(info->regmap, PPMU_PMNC, pmnc); if (ret < 0) return ret; return 0; } static int exynos_ppmu_set_event(struct devfreq_event_dev *edev) { struct exynos_ppmu *info = devfreq_event_get_drvdata(edev); int id = exynos_ppmu_find_ppmu_id(edev); int ret; u32 pmnc, cntens; if (id < 0) return id; /* Enable specific counter */ ret = regmap_read(info->regmap, PPMU_CNTENS, &cntens); if (ret < 0) return ret; cntens |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id)); ret = regmap_write(info->regmap, PPMU_CNTENS, cntens); if (ret < 0) return ret; /* Set the event of proper data type monitoring */ ret = regmap_write(info->regmap, PPMU_BEVTxSEL(id), edev->desc->event_type); if (ret < 0) return ret; /* Reset cycle counter/performance counter and enable PPMU */ ret = regmap_read(info->regmap, PPMU_PMNC, &pmnc); if (ret < 0) return ret; pmnc &= ~(PPMU_PMNC_ENABLE_MASK | PPMU_PMNC_COUNTER_RESET_MASK | PPMU_PMNC_CC_RESET_MASK); pmnc |= (PPMU_ENABLE << PPMU_PMNC_ENABLE_SHIFT); pmnc |= (PPMU_ENABLE << PPMU_PMNC_COUNTER_RESET_SHIFT); pmnc |= (PPMU_ENABLE << PPMU_PMNC_CC_RESET_SHIFT); ret = regmap_write(info->regmap, PPMU_PMNC, pmnc); if (ret < 0) return ret; return 0; } static int exynos_ppmu_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); unsigned int total_count, load_count; unsigned int pmcnt3_high, pmcnt3_low; unsigned int pmnc, cntenc; int ret; if (id < 0) return -EINVAL; /* Disable PPMU */ ret = regmap_read(info->regmap, PPMU_PMNC, &pmnc); if (ret < 0) return ret; pmnc &= ~PPMU_PMNC_ENABLE_MASK; ret = regmap_write(info->regmap, PPMU_PMNC, pmnc); if (ret < 0) return ret; /* Read cycle count */ ret = regmap_read(info->regmap, PPMU_CCNT, &total_count); if (ret < 0) return ret; edata->total_count = total_count; /* Read performance count */ switch (id) { case PPMU_PMNCNT0: case PPMU_PMNCNT1: case PPMU_PMNCNT2: ret = regmap_read(info->regmap, PPMU_PMNCT(id), &load_count); if (ret < 0) return ret; edata->load_count = load_count; break; case PPMU_PMNCNT3: ret = regmap_read(info->regmap, PPMU_PMCNT3_HIGH, &pmcnt3_high); if (ret < 0) return ret; ret = regmap_read(info->regmap, PPMU_PMCNT3_LOW, &pmcnt3_low); if (ret < 0) return ret; edata->load_count = ((pmcnt3_high << 8) | pmcnt3_low); break; default: return -EINVAL; } /* Disable specific counter */ ret = regmap_read(info->regmap, PPMU_CNTENC, &cntenc); if (ret < 0) return ret; cntenc |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id)); ret = regmap_write(info->regmap, PPMU_CNTENC, cntenc); if (ret < 0) return ret; dev_dbg(&edev->dev, "%s (event: %ld/%ld)\n", edev->desc->name, edata->load_count, edata->total_count); return 0; } static const struct devfreq_event_ops exynos_ppmu_ops = { .disable = exynos_ppmu_disable, .set_event = exynos_ppmu_set_event, .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); int ret; u32 pmnc, clear; /* Disable all counters */ clear = (PPMU_CCNT_MASK | PPMU_PMCNT0_MASK | PPMU_PMCNT1_MASK | PPMU_PMCNT2_MASK | PPMU_PMCNT3_MASK); ret = regmap_write(info->regmap, PPMU_V2_FLAG, clear); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_INTENC, clear); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_CNTENC, clear); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_CNT_RESET, clear); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_CIG_CFG0, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_CIG_CFG1, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_CIG_CFG2, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_CIG_RESULT, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_CNT_AUTO, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_CH_EV0_TYPE, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_CH_EV1_TYPE, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_CH_EV2_TYPE, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_CH_EV3_TYPE, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_SM_ID_V, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_SM_ID_A, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_SM_OTHERS_V, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_SM_OTHERS_A, 0x0); if (ret < 0) return ret; ret = regmap_write(info->regmap, PPMU_V2_INTERRUPT_RESET, 0x0); if (ret < 0) return ret; /* Disable PPMU */ ret = regmap_read(info->regmap, PPMU_V2_PMNC, &pmnc); if (ret < 0) return ret; pmnc &= ~PPMU_PMNC_ENABLE_MASK; ret = regmap_write(info->regmap, PPMU_V2_PMNC, pmnc); if (ret < 0) return ret; return 0; } static int exynos_ppmu_v2_set_event(struct devfreq_event_dev *edev) { struct exynos_ppmu *info = devfreq_event_get_drvdata(edev); unsigned int pmnc, cntens; int id = exynos_ppmu_find_ppmu_id(edev); int ret; /* Enable all counters */ ret = regmap_read(info->regmap, PPMU_V2_CNTENS, &cntens); if (ret < 0) return ret; cntens |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id)); ret = regmap_write(info->regmap, PPMU_V2_CNTENS, cntens); if (ret < 0) return ret; /* Set the event of proper data type monitoring */ ret = regmap_write(info->regmap, PPMU_V2_CH_EVx_TYPE(id), edev->desc->event_type); if (ret < 0) return ret; /* Reset cycle counter/performance counter and enable PPMU */ ret = regmap_read(info->regmap, PPMU_V2_PMNC, &pmnc); if (ret < 0) return ret; pmnc &= ~(PPMU_PMNC_ENABLE_MASK | PPMU_PMNC_COUNTER_RESET_MASK | PPMU_PMNC_CC_RESET_MASK | PPMU_PMNC_CC_DIVIDER_MASK | PPMU_V2_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 |= (PPMU_V2_MODE_MANUAL << PPMU_V2_PMNC_START_MODE_SHIFT); ret = regmap_write(info->regmap, PPMU_V2_PMNC, pmnc); if (ret < 0) return ret; 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); int ret; unsigned int pmnc, cntenc; unsigned int pmcnt_high, pmcnt_low; unsigned int total_count, count; unsigned long load_count = 0; /* Disable PPMU */ ret = regmap_read(info->regmap, PPMU_V2_PMNC, &pmnc); if (ret < 0) return ret; pmnc &= ~PPMU_PMNC_ENABLE_MASK; ret = regmap_write(info->regmap, PPMU_V2_PMNC, pmnc); if (ret < 0) return ret; /* Read cycle count and performance count */ ret = regmap_read(info->regmap, PPMU_V2_CCNT, &total_count); if (ret < 0) return ret; edata->total_count = total_count; switch (id) { case PPMU_PMNCNT0: case PPMU_PMNCNT1: case PPMU_PMNCNT2: ret = regmap_read(info->regmap, PPMU_V2_PMNCT(id), &count); if (ret < 0) return ret; load_count = count; break; case PPMU_PMNCNT3: ret = regmap_read(info->regmap, PPMU_V2_PMCNT3_HIGH, &pmcnt_high); if (ret < 0) return ret; ret = regmap_read(info->regmap, PPMU_V2_PMCNT3_LOW, &pmcnt_low); if (ret < 0) return ret; load_count = ((u64)((pmcnt_high & 0xff)) << 32)+ (u64)pmcnt_low; break; } edata->load_count = load_count; /* Disable all counters */ ret = regmap_read(info->regmap, PPMU_V2_CNTENC, &cntenc); if (ret < 0) return 0; cntenc |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id)); ret = regmap_write(info->regmap, PPMU_V2_CNTENC, cntenc); if (ret < 0) return ret; dev_dbg(&edev->dev, "%25s (load: %ld / %ld)\n", edev->desc->name, edata->load_count, edata->total_count); return 0; } static const 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 const struct of_device_id exynos_ppmu_id_match[] = { { .compatible = "samsung,exynos-ppmu", .data = (void *)EXYNOS_TYPE_PPMU, }, { .compatible = "samsung,exynos-ppmu-v2", .data = (void *)EXYNOS_TYPE_PPMU_V2, }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, exynos_ppmu_id_match); static int of_get_devfreq_events(struct device_node *np, struct exynos_ppmu *info) { struct devfreq_event_desc *desc; struct device *dev = info->dev; struct device_node *events_np, *node; int i, j, count; const struct of_device_id *of_id; int ret; events_np = of_get_child_by_name(np, "events"); if (!events_np) { dev_err(dev, "failed to get child node of devfreq-event devices\n"); return -EINVAL; } count = of_get_child_count(events_np); desc = devm_kcalloc(dev, count, sizeof(*desc), GFP_KERNEL); if (!desc) return -ENOMEM; info->num_events = count; of_id = of_match_device(exynos_ppmu_id_match, dev); if (of_id) info->ppmu_type = (enum exynos_ppmu_type)of_id->data; else return -EINVAL; j = 0; for_each_child_of_node(events_np, node) { for (i = 0; i < ARRAY_SIZE(ppmu_events); i++) { if (!ppmu_events[i].name) continue; if (of_node_name_eq(node, ppmu_events[i].name)) break; } if (i == ARRAY_SIZE(ppmu_events)) { dev_warn(dev, "don't know how to configure events : %pOFn\n", node); continue; } switch (info->ppmu_type) { case EXYNOS_TYPE_PPMU: desc[j].ops = &exynos_ppmu_ops; break; case EXYNOS_TYPE_PPMU_V2: desc[j].ops = &exynos_ppmu_v2_ops; break; } desc[j].driver_data = info; of_property_read_string(node, "event-name", &desc[j].name); ret = of_property_read_u32(node, "event-data-type", &desc[j].event_type); if (ret) { /* Set the event of proper data type counting. * Check if the data type has been defined in DT, * use default if not. */ if (info->ppmu_type == EXYNOS_TYPE_PPMU_V2) { int id; /* Not all registers take the same value for * read+write data count. */ id = __exynos_ppmu_find_ppmu_id(desc[j].name); switch (id) { case PPMU_PMNCNT0: case PPMU_PMNCNT1: case PPMU_PMNCNT2: desc[j].event_type = PPMU_V2_RO_DATA_CNT | PPMU_V2_WO_DATA_CNT; break; case PPMU_PMNCNT3: desc[j].event_type = PPMU_V2_EVT3_RW_DATA_CNT; break; } } else { desc[j].event_type = PPMU_RO_DATA_CNT | PPMU_WO_DATA_CNT; } } j++; } info->desc = desc; of_node_put(events_np); return 0; } static struct regmap_config exynos_ppmu_regmap_config = { .reg_bits = 32, .val_bits = 32, .reg_stride = 4, }; static int exynos_ppmu_parse_dt(struct platform_device *pdev, struct exynos_ppmu *info) { struct device *dev = info->dev; struct device_node *np = dev->of_node; struct resource *res; void __iomem *base; int ret = 0; if (!np) { dev_err(dev, "failed to find devicetree node\n"); return -EINVAL; } /* Maps the memory mapped IO to control PPMU register */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(dev, res); if (IS_ERR(base)) return PTR_ERR(base); exynos_ppmu_regmap_config.max_register = resource_size(res) - 4; info->regmap = devm_regmap_init_mmio(dev, base, &exynos_ppmu_regmap_config); if (IS_ERR(info->regmap)) { dev_err(dev, "failed to initialize regmap\n"); return PTR_ERR(info->regmap); } info->ppmu.clk = devm_clk_get(dev, "ppmu"); if (IS_ERR(info->ppmu.clk)) { info->ppmu.clk = NULL; dev_warn(dev, "cannot get PPMU clock\n"); } ret = of_get_devfreq_events(np, info); if (ret < 0) { dev_err(dev, "failed to parse exynos ppmu dt node\n"); return ret; } return 0; } static int exynos_ppmu_probe(struct platform_device *pdev) { struct exynos_ppmu *info; struct devfreq_event_dev **edev; struct devfreq_event_desc *desc; int i, ret = 0, size; info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; info->dev = &pdev->dev; /* Parse dt data to get resource */ ret = exynos_ppmu_parse_dt(pdev, info); if (ret < 0) { dev_err(&pdev->dev, "failed to parse devicetree for resource\n"); return ret; } desc = info->desc; size = sizeof(struct devfreq_event_dev *) * info->num_events; info->edev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); if (!info->edev) return -ENOMEM; edev = info->edev; platform_set_drvdata(pdev, info); for (i = 0; i < info->num_events; i++) { edev[i] = devm_devfreq_event_add_edev(&pdev->dev, &desc[i]); if (IS_ERR(edev[i])) { dev_err(&pdev->dev, "failed to add devfreq-event device\n"); return PTR_ERR(edev[i]); } pr_info("exynos-ppmu: new PPMU device registered %s (%s)\n", dev_name(&pdev->dev), desc[i].name); } ret = clk_prepare_enable(info->ppmu.clk); if (ret) { dev_err(&pdev->dev, "failed to prepare ppmu clock\n"); return ret; } return 0; } static int exynos_ppmu_remove(struct platform_device *pdev) { struct exynos_ppmu *info = platform_get_drvdata(pdev); clk_disable_unprepare(info->ppmu.clk); return 0; } static struct platform_driver exynos_ppmu_driver = { .probe = exynos_ppmu_probe, .remove = exynos_ppmu_remove, .driver = { .name = "exynos-ppmu", .of_match_table = exynos_ppmu_id_match, }, }; module_platform_driver(exynos_ppmu_driver); MODULE_DESCRIPTION("Exynos PPMU(Platform Performance Monitoring Unit) driver"); MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); MODULE_LICENSE("GPL");
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