From: Shaokun Zhang zhangshaokun@hisilicon.com
mainline inclusion from mainline-v5.12-rc3 commit cce03e702c9f26a43b16c51bf03029911feab692 category: feature bugzilla: 175148 CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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DDRC PMU's events are useful for performance profiling, but the events are limited and counter is fixed. On HiSilicon Hip09 platform, PMU counters are the programmable and more events are supported. Let's add the DDRC PMU v2 driver.
Bandwidth events are exposed directly in driver and some more events will listed in JSON file later.
Cc: Mark Rutland mark.rutland@arm.com Cc: Will Deacon will@kernel.org Cc: John Garry john.garry@huawei.com Cc: Jonathan Cameron Jonathan.Cameron@huawei.com Reviewed-by: John Garry john.garry@huawei.com Co-developed-by: Qi Liu liuqi115@huawei.com Signed-off-by: Qi Liu liuqi115@huawei.com Signed-off-by: Shaokun Zhang zhangshaokun@hisilicon.com Link: https://lore.kernel.org/r/1615186237-22263-7-git-send-email-zhangshaokun@his... Signed-off-by: Will Deacon will@kernel.org Reviewed-by: Shaokun Zhang zhangshaokun@hisilicon.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c | 207 ++++++++++++++++-- drivers/perf/hisilicon/hisi_uncore_pmu.h | 2 + 2 files changed, 196 insertions(+), 13 deletions(-)
diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c index d85751a99165..69f5595f5c80 100644 --- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c @@ -18,7 +18,7 @@
#include "hisi_uncore_pmu.h"
-/* DDRC register definition */ +/* DDRC register definition in v1 */ #define DDRC_PERF_CTRL 0x010 #define DDRC_FLUX_WR 0x380 #define DDRC_FLUX_RD 0x384 @@ -34,13 +34,24 @@ #define DDRC_INT_CLEAR 0x6d0 #define DDRC_VERSION 0x710
+/* DDRC register definition in v2 */ +#define DDRC_V2_INT_MASK 0x528 +#define DDRC_V2_INT_STATUS 0x52c +#define DDRC_V2_INT_CLEAR 0x530 +#define DDRC_V2_EVENT_CNT 0xe00 +#define DDRC_V2_EVENT_CTRL 0xe70 +#define DDRC_V2_EVENT_TYPE 0xe74 +#define DDRC_V2_PERF_CTRL 0xeA0 + /* DDRC has 8-counters */ #define DDRC_NR_COUNTERS 0x8 #define DDRC_V1_PERF_CTRL_EN 0x2 +#define DDRC_V2_PERF_CTRL_EN 0x1 #define DDRC_V1_NR_EVENTS 0x7 +#define DDRC_V2_NR_EVENTS 0x90
/* - * For DDRC PMU, there are eight-events and every event has been mapped + * For PMU v1, there are eight-events and every event has been mapped * to fixed-purpose counters which register offset is not consistent. * Therefore there is no write event type and we assume that event * code (0 to 7) is equal to counter index in PMU driver. @@ -62,6 +73,11 @@ static u32 hisi_ddrc_pmu_v1_get_counter_offset(int cntr_idx) return ddrc_reg_off[cntr_idx]; }
+static u32 hisi_ddrc_pmu_v2_get_counter_offset(int cntr_idx) +{ + return DDRC_V2_EVENT_CNT + cntr_idx * 8; +} + static u64 hisi_ddrc_pmu_v1_read_counter(struct hisi_pmu *ddrc_pmu, struct hw_perf_event *hwc) { @@ -76,13 +92,34 @@ static void hisi_ddrc_pmu_v1_write_counter(struct hisi_pmu *ddrc_pmu, ddrc_pmu->base + hisi_ddrc_pmu_v1_get_counter_offset(hwc->idx)); }
+static u64 hisi_ddrc_pmu_v2_read_counter(struct hisi_pmu *ddrc_pmu, + struct hw_perf_event *hwc) +{ + return readq(ddrc_pmu->base + + hisi_ddrc_pmu_v2_get_counter_offset(hwc->idx)); +} + +static void hisi_ddrc_pmu_v2_write_counter(struct hisi_pmu *ddrc_pmu, + struct hw_perf_event *hwc, u64 val) +{ + writeq(val, + ddrc_pmu->base + hisi_ddrc_pmu_v2_get_counter_offset(hwc->idx)); +} + /* - * For DDRC PMU, event has been mapped to fixed-purpose counter by hardware, - * so there is no need to write event type. + * For DDRC PMU v1, event has been mapped to fixed-purpose counter by hardware, + * so there is no need to write event type, while it is programmable counter in + * PMU v2. */ static void hisi_ddrc_pmu_write_evtype(struct hisi_pmu *hha_pmu, int idx, u32 type) { + u32 offset; + + if (hha_pmu->identifier >= HISI_PMU_V2) { + offset = DDRC_V2_EVENT_TYPE + 4 * idx; + writel(type, hha_pmu->base + offset); + } }
static void hisi_ddrc_pmu_v1_start_counters(struct hisi_pmu *ddrc_pmu) @@ -143,6 +180,49 @@ static int hisi_ddrc_pmu_v1_get_event_idx(struct perf_event *event) return idx; }
+static int hisi_ddrc_pmu_v2_get_event_idx(struct perf_event *event) +{ + return hisi_uncore_pmu_get_event_idx(event); +} + +static void hisi_ddrc_pmu_v2_start_counters(struct hisi_pmu *ddrc_pmu) +{ + u32 val; + + val = readl(ddrc_pmu->base + DDRC_V2_PERF_CTRL); + val |= DDRC_V2_PERF_CTRL_EN; + writel(val, ddrc_pmu->base + DDRC_V2_PERF_CTRL); +} + +static void hisi_ddrc_pmu_v2_stop_counters(struct hisi_pmu *ddrc_pmu) +{ + u32 val; + + val = readl(ddrc_pmu->base + DDRC_V2_PERF_CTRL); + val &= ~DDRC_V2_PERF_CTRL_EN; + writel(val, ddrc_pmu->base + DDRC_V2_PERF_CTRL); +} + +static void hisi_ddrc_pmu_v2_enable_counter(struct hisi_pmu *ddrc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + val = readl(ddrc_pmu->base + DDRC_V2_EVENT_CTRL); + val |= 1 << hwc->idx; + writel(val, ddrc_pmu->base + DDRC_V2_EVENT_CTRL); +} + +static void hisi_ddrc_pmu_v2_disable_counter(struct hisi_pmu *ddrc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + val = readl(ddrc_pmu->base + DDRC_V2_EVENT_CTRL); + val &= ~(1 << hwc->idx); + writel(val, ddrc_pmu->base + DDRC_V2_EVENT_CTRL); +} + static void hisi_ddrc_pmu_v1_enable_counter_int(struct hisi_pmu *ddrc_pmu, struct hw_perf_event *hwc) { @@ -150,7 +230,7 @@ static void hisi_ddrc_pmu_v1_enable_counter_int(struct hisi_pmu *ddrc_pmu,
/* Write 0 to enable interrupt */ val = readl(ddrc_pmu->base + DDRC_INT_MASK); - val &= ~(1 << GET_DDRC_EVENTID(hwc)); + val &= ~(1 << hwc->idx); writel(val, ddrc_pmu->base + DDRC_INT_MASK); }
@@ -161,10 +241,30 @@ static void hisi_ddrc_pmu_v1_disable_counter_int(struct hisi_pmu *ddrc_pmu,
/* Write 1 to mask interrupt */ val = readl(ddrc_pmu->base + DDRC_INT_MASK); - val |= (1 << GET_DDRC_EVENTID(hwc)); + val |= 1 << hwc->idx; writel(val, ddrc_pmu->base + DDRC_INT_MASK); }
+static void hisi_ddrc_pmu_v2_enable_counter_int(struct hisi_pmu *ddrc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + val = readl(ddrc_pmu->base + DDRC_V2_INT_MASK); + val &= ~(1 << hwc->idx); + writel(val, ddrc_pmu->base + DDRC_V2_INT_MASK); +} + +static void hisi_ddrc_pmu_v2_disable_counter_int(struct hisi_pmu *ddrc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + val = readl(ddrc_pmu->base + DDRC_V2_INT_MASK); + val |= 1 << hwc->idx; + writel(val, ddrc_pmu->base + DDRC_V2_INT_MASK); +} + static u32 hisi_ddrc_pmu_v1_get_int_status(struct hisi_pmu *ddrc_pmu) { return readl(ddrc_pmu->base + DDRC_INT_STATUS); @@ -176,9 +276,21 @@ static void hisi_ddrc_pmu_v1_clear_int_status(struct hisi_pmu *ddrc_pmu, writel(1 << idx, ddrc_pmu->base + DDRC_INT_CLEAR); }
+static u32 hisi_ddrc_pmu_v2_get_int_status(struct hisi_pmu *ddrc_pmu) +{ + return readl(ddrc_pmu->base + DDRC_V2_INT_STATUS); +} + +static void hisi_ddrc_pmu_v2_clear_int_status(struct hisi_pmu *ddrc_pmu, + int idx) +{ + writel(1 << idx, ddrc_pmu->base + DDRC_V2_INT_CLEAR); +} + static const struct acpi_device_id hisi_ddrc_pmu_acpi_match[] = { { "HISI0233", }, - {}, + { "HISI0234", }, + {} }; MODULE_DEVICE_TABLE(acpi, hisi_ddrc_pmu_acpi_match);
@@ -210,6 +322,13 @@ static int hisi_ddrc_pmu_init_data(struct platform_device *pdev, }
ddrc_pmu->identifier = readl(ddrc_pmu->base + DDRC_VERSION); + if (ddrc_pmu->identifier >= HISI_PMU_V2) { + if (device_property_read_u32(&pdev->dev, "hisilicon,sub-id", + &ddrc_pmu->sub_id)) { + dev_err(&pdev->dev, "Can not read sub-id!\n"); + return -EINVAL; + } + }
return 0; } @@ -224,6 +343,16 @@ static const struct attribute_group hisi_ddrc_pmu_v1_format_group = { .attrs = hisi_ddrc_pmu_v1_format_attr, };
+static struct attribute *hisi_ddrc_pmu_v2_format_attr[] = { + HISI_PMU_FORMAT_ATTR(event, "config:0-7"), + NULL +}; + +static const struct attribute_group hisi_ddrc_pmu_v2_format_group = { + .name = "format", + .attrs = hisi_ddrc_pmu_v2_format_attr, +}; + static struct attribute *hisi_ddrc_pmu_v1_events_attr[] = { HISI_PMU_EVENT_ATTR(flux_wr, 0x00), HISI_PMU_EVENT_ATTR(flux_rd, 0x01), @@ -241,6 +370,18 @@ static const struct attribute_group hisi_ddrc_pmu_v1_events_group = { .attrs = hisi_ddrc_pmu_v1_events_attr, };
+static struct attribute *hisi_ddrc_pmu_v2_events_attr[] = { + HISI_PMU_EVENT_ATTR(cycles, 0x00), + HISI_PMU_EVENT_ATTR(flux_wr, 0x83), + HISI_PMU_EVENT_ATTR(flux_rd, 0x84), + NULL +}; + +static const struct attribute_group hisi_ddrc_pmu_v2_events_group = { + .name = "events", + .attrs = hisi_ddrc_pmu_v2_events_attr, +}; + static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
static struct attribute *hisi_ddrc_pmu_cpumask_attrs[] = { @@ -272,6 +413,14 @@ static const struct attribute_group *hisi_ddrc_pmu_v1_attr_groups[] = { NULL, };
+static const struct attribute_group *hisi_ddrc_pmu_v2_attr_groups[] = { + &hisi_ddrc_pmu_v2_format_group, + &hisi_ddrc_pmu_v2_events_group, + &hisi_ddrc_pmu_cpumask_attr_group, + &hisi_ddrc_pmu_identifier_group, + NULL +}; + static const struct hisi_uncore_ops hisi_uncore_ddrc_v1_ops = { .write_evtype = hisi_ddrc_pmu_write_evtype, .get_event_idx = hisi_ddrc_pmu_v1_get_event_idx, @@ -287,6 +436,21 @@ static const struct hisi_uncore_ops hisi_uncore_ddrc_v1_ops = { .clear_int_status = hisi_ddrc_pmu_v1_clear_int_status, };
+static const struct hisi_uncore_ops hisi_uncore_ddrc_v2_ops = { + .write_evtype = hisi_ddrc_pmu_write_evtype, + .get_event_idx = hisi_ddrc_pmu_v2_get_event_idx, + .start_counters = hisi_ddrc_pmu_v2_start_counters, + .stop_counters = hisi_ddrc_pmu_v2_stop_counters, + .enable_counter = hisi_ddrc_pmu_v2_enable_counter, + .disable_counter = hisi_ddrc_pmu_v2_disable_counter, + .enable_counter_int = hisi_ddrc_pmu_v2_enable_counter_int, + .disable_counter_int = hisi_ddrc_pmu_v2_disable_counter_int, + .write_counter = hisi_ddrc_pmu_v2_write_counter, + .read_counter = hisi_ddrc_pmu_v2_read_counter, + .get_int_status = hisi_ddrc_pmu_v2_get_int_status, + .clear_int_status = hisi_ddrc_pmu_v2_clear_int_status, +}; + static int hisi_ddrc_pmu_dev_probe(struct platform_device *pdev, struct hisi_pmu *ddrc_pmu) { @@ -300,12 +464,21 @@ static int hisi_ddrc_pmu_dev_probe(struct platform_device *pdev, if (ret) return ret;
+ if (ddrc_pmu->identifier >= HISI_PMU_V2) { + ddrc_pmu->counter_bits = 48; + ddrc_pmu->check_event = DDRC_V2_NR_EVENTS; + ddrc_pmu->pmu_events.attr_groups = hisi_ddrc_pmu_v2_attr_groups; + ddrc_pmu->ops = &hisi_uncore_ddrc_v2_ops; + } else { + ddrc_pmu->counter_bits = 32; + ddrc_pmu->check_event = DDRC_V1_NR_EVENTS; + ddrc_pmu->pmu_events.attr_groups = hisi_ddrc_pmu_v1_attr_groups; + ddrc_pmu->ops = &hisi_uncore_ddrc_v1_ops; + } + ddrc_pmu->num_counters = DDRC_NR_COUNTERS; - ddrc_pmu->counter_bits = 32; - ddrc_pmu->ops = &hisi_uncore_ddrc_v1_ops; ddrc_pmu->dev = &pdev->dev; ddrc_pmu->on_cpu = -1; - ddrc_pmu->check_event = DDRC_V1_NR_EVENTS;
return 0; } @@ -333,8 +506,16 @@ static int hisi_ddrc_pmu_probe(struct platform_device *pdev) return ret; }
- name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_ddrc%u", - ddrc_pmu->sccl_id, ddrc_pmu->index_id); + if (ddrc_pmu->identifier >= HISI_PMU_V2) + name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "hisi_sccl%u_ddrc%u_%u", + ddrc_pmu->sccl_id, ddrc_pmu->index_id, + ddrc_pmu->sub_id); + else + name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "hisi_sccl%u_ddrc%u", ddrc_pmu->sccl_id, + ddrc_pmu->index_id); + ddrc_pmu->pmu = (struct pmu) { .name = name, .module = THIS_MODULE, @@ -347,7 +528,7 @@ static int hisi_ddrc_pmu_probe(struct platform_device *pdev) .start = hisi_uncore_pmu_start, .stop = hisi_uncore_pmu_stop, .read = hisi_uncore_pmu_read, - .attr_groups = hisi_ddrc_pmu_v1_attr_groups, + .attr_groups = ddrc_pmu->pmu_events.attr_groups, .capabilities = PERF_PMU_CAP_NO_EXCLUDE, };
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisilicon/hisi_uncore_pmu.h index 1591dbc6a119..ea9d89bbc1ea 100644 --- a/drivers/perf/hisilicon/hisi_uncore_pmu.h +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.h @@ -85,6 +85,8 @@ struct hisi_pmu { void __iomem *base; /* the ID of the PMU modules */ u32 index_id; + /* For DDRC PMU v2: each DDRC has more than one DMC */ + u32 sub_id; int num_counters; int counter_bits; /* check event code range */