// SPDX-License-Identifier: GPL-2.0
-/* Marvell CN10K DRAM Subsystem (DSS) Performance Monitor Driver
+/*
+ * Marvell CN10K DRAM Subsystem (DSS) Performance Monitor Driver
*
- * Copyright (C) 2021 Marvell.
+ * Copyright (C) 2021-2024 Marvell.
*/
#include <linux/init.h>
#include <linux/platform_device.h>
/* Performance Counters Operating Mode Control Registers */
-#define DDRC_PERF_CNT_OP_MODE_CTRL 0x8020
-#define OP_MODE_CTRL_VAL_MANNUAL 0x1
+#define CN10K_DDRC_PERF_CNT_OP_MODE_CTRL 0x8020
+#define OP_MODE_CTRL_VAL_MANUAL 0x1
/* Performance Counters Start Operation Control Registers */
-#define DDRC_PERF_CNT_START_OP_CTRL 0x8028
+#define CN10K_DDRC_PERF_CNT_START_OP_CTRL 0x8028
#define START_OP_CTRL_VAL_START 0x1ULL
#define START_OP_CTRL_VAL_ACTIVE 0x2
/* Performance Counters End Operation Control Registers */
-#define DDRC_PERF_CNT_END_OP_CTRL 0x8030
+#define CN10K_DDRC_PERF_CNT_END_OP_CTRL 0x8030
#define END_OP_CTRL_VAL_END 0x1ULL
/* Performance Counters End Status Registers */
-#define DDRC_PERF_CNT_END_STATUS 0x8038
+#define CN10K_DDRC_PERF_CNT_END_STATUS 0x8038
#define END_STATUS_VAL_END_TIMER_MODE_END 0x1
/* Performance Counters Configuration Registers */
-#define DDRC_PERF_CFG_BASE 0x8040
+#define CN10K_DDRC_PERF_CFG_BASE 0x8040
/* 8 Generic event counter + 2 fixed event counters */
#define DDRC_PERF_NUM_GEN_COUNTERS 8
DDRC_PERF_NUM_FIX_COUNTERS)
/* Generic event counter registers */
-#define DDRC_PERF_CFG(n) (DDRC_PERF_CFG_BASE + 8 * (n))
+#define DDRC_PERF_CFG(base, n) ((base) + 8 * (n))
#define EVENT_ENABLE BIT_ULL(63)
/* Two dedicated event counters for DDR reads and writes */
#define EVENT_DDR_READS 101
#define EVENT_DDR_WRITES 100
+#define DDRC_PERF_REG(base, n) ((base) + 8 * (n))
/*
* programmable events IDs in programmable event counters.
* DO NOT change these event-id numbers, they are used to
#define EVENT_HIF_RD_OR_WR 1
/* Event counter value registers */
-#define DDRC_PERF_CNT_VALUE_BASE 0x8080
-#define DDRC_PERF_CNT_VALUE(n) (DDRC_PERF_CNT_VALUE_BASE + 8 * (n))
+#define CN10K_DDRC_PERF_CNT_VALUE_BASE 0x8080
/* Fixed event counter enable/disable register */
-#define DDRC_PERF_CNT_FREERUN_EN 0x80C0
+#define CN10K_DDRC_PERF_CNT_FREERUN_EN 0x80C0
#define DDRC_PERF_FREERUN_WRITE_EN 0x1
#define DDRC_PERF_FREERUN_READ_EN 0x2
/* Fixed event counter control register */
-#define DDRC_PERF_CNT_FREERUN_CTRL 0x80C8
+#define CN10K_DDRC_PERF_CNT_FREERUN_CTRL 0x80C8
#define DDRC_FREERUN_WRITE_CNT_CLR 0x1
#define DDRC_FREERUN_READ_CNT_CLR 0x2
-/* Fixed event counter value register */
-#define DDRC_PERF_CNT_VALUE_WR_OP 0x80D0
-#define DDRC_PERF_CNT_VALUE_RD_OP 0x80D8
#define DDRC_PERF_CNT_VALUE_OVERFLOW BIT_ULL(48)
#define DDRC_PERF_CNT_MAX_VALUE GENMASK_ULL(48, 0)
+/* Fixed event counter value register */
+#define CN10K_DDRC_PERF_CNT_VALUE_WR_OP 0x80D0
+#define CN10K_DDRC_PERF_CNT_VALUE_RD_OP 0x80D8
+
struct cn10k_ddr_pmu {
struct pmu pmu;
void __iomem *base;
+ const struct ddr_pmu_platform_data *p_data;
unsigned int cpu;
struct device *dev;
int active_events;
#define to_cn10k_ddr_pmu(p) container_of(p, struct cn10k_ddr_pmu, pmu)
+struct ddr_pmu_platform_data {
+ u64 counter_overflow_val;
+ u64 counter_max_val;
+ u64 cnt_base;
+ u64 cfg_base;
+ u64 cnt_op_mode_ctrl;
+ u64 cnt_start_op_ctrl;
+ u64 cnt_end_op_ctrl;
+ u64 cnt_end_status;
+ u64 cnt_freerun_en;
+ u64 cnt_freerun_ctrl;
+ u64 cnt_freerun_clr;
+ u64 cnt_value_wr_op;
+ u64 cnt_value_rd_op;
+ bool is_cn10k;
+};
+
static ssize_t cn10k_ddr_pmu_event_show(struct device *dev,
struct device_attribute *attr,
char *page)
static void cn10k_ddr_perf_counter_enable(struct cn10k_ddr_pmu *pmu,
int counter, bool enable)
{
+ const struct ddr_pmu_platform_data *p_data = pmu->p_data;
u32 reg;
u64 val;
}
if (counter < DDRC_PERF_NUM_GEN_COUNTERS) {
- reg = DDRC_PERF_CFG(counter);
+ reg = DDRC_PERF_CFG(p_data->cfg_base, counter);
val = readq_relaxed(pmu->base + reg);
if (enable)
writeq_relaxed(val, pmu->base + reg);
} else {
- val = readq_relaxed(pmu->base + DDRC_PERF_CNT_FREERUN_EN);
+ val = readq_relaxed(pmu->base +
+ p_data->cnt_freerun_en);
if (enable) {
if (counter == DDRC_PERF_READ_COUNTER_IDX)
val |= DDRC_PERF_FREERUN_READ_EN;
else
val &= ~DDRC_PERF_FREERUN_WRITE_EN;
}
- writeq_relaxed(val, pmu->base + DDRC_PERF_CNT_FREERUN_EN);
+ writeq_relaxed(val, pmu->base +
+ p_data->cnt_freerun_en);
}
}
static u64 cn10k_ddr_perf_read_counter(struct cn10k_ddr_pmu *pmu, int counter)
{
+ const struct ddr_pmu_platform_data *p_data = pmu->p_data;
u64 val;
if (counter == DDRC_PERF_READ_COUNTER_IDX)
- return readq_relaxed(pmu->base + DDRC_PERF_CNT_VALUE_RD_OP);
+ return readq_relaxed(pmu->base +
+ p_data->cnt_value_rd_op);
if (counter == DDRC_PERF_WRITE_COUNTER_IDX)
- return readq_relaxed(pmu->base + DDRC_PERF_CNT_VALUE_WR_OP);
+ return readq_relaxed(pmu->base +
+ p_data->cnt_value_wr_op);
- val = readq_relaxed(pmu->base + DDRC_PERF_CNT_VALUE(counter));
+ val = readq_relaxed(pmu->base +
+ DDRC_PERF_REG(p_data->cnt_base, counter));
return val;
}
static void cn10k_ddr_perf_event_update(struct perf_event *event)
{
struct cn10k_ddr_pmu *pmu = to_cn10k_ddr_pmu(event->pmu);
+ const struct ddr_pmu_platform_data *p_data = pmu->p_data;
struct hw_perf_event *hwc = &event->hw;
u64 prev_count, new_count, mask;
new_count = cn10k_ddr_perf_read_counter(pmu, hwc->idx);
} while (local64_xchg(&hwc->prev_count, new_count) != prev_count);
- mask = DDRC_PERF_CNT_MAX_VALUE;
+ mask = p_data->counter_max_val;
local64_add((new_count - prev_count) & mask, &event->count);
}
static int cn10k_ddr_perf_event_add(struct perf_event *event, int flags)
{
struct cn10k_ddr_pmu *pmu = to_cn10k_ddr_pmu(event->pmu);
+ const struct ddr_pmu_platform_data *p_data = pmu->p_data;
struct hw_perf_event *hwc = &event->hw;
u8 config = event->attr.config;
int counter, ret;
if (counter < DDRC_PERF_NUM_GEN_COUNTERS) {
/* Generic counters, configure event id */
- reg_offset = DDRC_PERF_CFG(counter);
+ reg_offset = DDRC_PERF_CFG(p_data->cfg_base, counter);
ret = ddr_perf_get_event_bitmap(config, &val);
if (ret)
return ret;
else
val = DDRC_FREERUN_WRITE_CNT_CLR;
- writeq_relaxed(val, pmu->base + DDRC_PERF_CNT_FREERUN_CTRL);
+ writeq_relaxed(val, pmu->base + p_data->cnt_freerun_ctrl);
}
hwc->state |= PERF_HES_STOPPED;
static void cn10k_ddr_perf_pmu_enable(struct pmu *pmu)
{
struct cn10k_ddr_pmu *ddr_pmu = to_cn10k_ddr_pmu(pmu);
+ const struct ddr_pmu_platform_data *p_data = ddr_pmu->p_data;
writeq_relaxed(START_OP_CTRL_VAL_START, ddr_pmu->base +
- DDRC_PERF_CNT_START_OP_CTRL);
+ p_data->cnt_start_op_ctrl);
}
static void cn10k_ddr_perf_pmu_disable(struct pmu *pmu)
{
struct cn10k_ddr_pmu *ddr_pmu = to_cn10k_ddr_pmu(pmu);
+ const struct ddr_pmu_platform_data *p_data = ddr_pmu->p_data;
writeq_relaxed(END_OP_CTRL_VAL_END, ddr_pmu->base +
- DDRC_PERF_CNT_END_OP_CTRL);
+ p_data->cnt_end_op_ctrl);
}
static void cn10k_ddr_perf_event_update_all(struct cn10k_ddr_pmu *pmu)
static irqreturn_t cn10k_ddr_pmu_overflow_handler(struct cn10k_ddr_pmu *pmu)
{
+ const struct ddr_pmu_platform_data *p_data = pmu->p_data;
struct perf_event *event;
struct hw_perf_event *hwc;
u64 prev_count, new_count;
continue;
value = cn10k_ddr_perf_read_counter(pmu, i);
- if (value == DDRC_PERF_CNT_MAX_VALUE) {
+ if (value == p_data->counter_max_val) {
pr_info("Counter-(%d) reached max value\n", i);
cn10k_ddr_perf_event_update_all(pmu);
cn10k_ddr_perf_pmu_disable(&pmu->pmu);
return 0;
}
+#if defined(CONFIG_ACPI) || defined(CONFIG_OF)
+static const struct ddr_pmu_platform_data cn10k_ddr_pmu_pdata = {
+ .counter_overflow_val = BIT_ULL(48),
+ .counter_max_val = GENMASK_ULL(48, 0),
+ .cnt_base = CN10K_DDRC_PERF_CNT_VALUE_BASE,
+ .cfg_base = CN10K_DDRC_PERF_CFG_BASE,
+ .cnt_op_mode_ctrl = CN10K_DDRC_PERF_CNT_OP_MODE_CTRL,
+ .cnt_start_op_ctrl = CN10K_DDRC_PERF_CNT_START_OP_CTRL,
+ .cnt_end_op_ctrl = CN10K_DDRC_PERF_CNT_END_OP_CTRL,
+ .cnt_end_status = CN10K_DDRC_PERF_CNT_END_STATUS,
+ .cnt_freerun_en = CN10K_DDRC_PERF_CNT_FREERUN_EN,
+ .cnt_freerun_ctrl = CN10K_DDRC_PERF_CNT_FREERUN_CTRL,
+ .cnt_freerun_clr = 0,
+ .cnt_value_wr_op = CN10K_DDRC_PERF_CNT_VALUE_WR_OP,
+ .cnt_value_rd_op = CN10K_DDRC_PERF_CNT_VALUE_RD_OP,
+ .is_cn10k = TRUE,
+};
+#endif
+
static int cn10k_ddr_perf_probe(struct platform_device *pdev)
{
+ const struct ddr_pmu_platform_data *dev_data;
struct cn10k_ddr_pmu *ddr_pmu;
struct resource *res;
void __iomem *base;
+ bool is_cn10k;
char *name;
int ret;
ddr_pmu->dev = &pdev->dev;
platform_set_drvdata(pdev, ddr_pmu);
+ dev_data = device_get_match_data(&pdev->dev);
+ if (!dev_data) {
+ dev_err(&pdev->dev, "Error: No device match data found\n");
+ return -ENODEV;
+ }
+
base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(base))
return PTR_ERR(base);
ddr_pmu->base = base;
- /* Setup the PMU counter to work in manual mode */
- writeq_relaxed(OP_MODE_CTRL_VAL_MANNUAL, ddr_pmu->base +
- DDRC_PERF_CNT_OP_MODE_CTRL);
-
- ddr_pmu->pmu = (struct pmu) {
- .module = THIS_MODULE,
- .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
- .task_ctx_nr = perf_invalid_context,
- .attr_groups = cn10k_attr_groups,
- .event_init = cn10k_ddr_perf_event_init,
- .add = cn10k_ddr_perf_event_add,
- .del = cn10k_ddr_perf_event_del,
- .start = cn10k_ddr_perf_event_start,
- .stop = cn10k_ddr_perf_event_stop,
- .read = cn10k_ddr_perf_event_update,
- .pmu_enable = cn10k_ddr_perf_pmu_enable,
- .pmu_disable = cn10k_ddr_perf_pmu_disable,
- };
+ ddr_pmu->p_data = dev_data;
+ is_cn10k = ddr_pmu->p_data->is_cn10k;
+
+ if (is_cn10k) {
+ /* Setup the PMU counter to work in manual mode */
+ writeq_relaxed(OP_MODE_CTRL_VAL_MANUAL, ddr_pmu->base +
+ ddr_pmu->p_data->cnt_op_mode_ctrl);
+
+ ddr_pmu->pmu = (struct pmu) {
+ .module = THIS_MODULE,
+ .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
+ .task_ctx_nr = perf_invalid_context,
+ .attr_groups = cn10k_attr_groups,
+ .event_init = cn10k_ddr_perf_event_init,
+ .add = cn10k_ddr_perf_event_add,
+ .del = cn10k_ddr_perf_event_del,
+ .start = cn10k_ddr_perf_event_start,
+ .stop = cn10k_ddr_perf_event_stop,
+ .read = cn10k_ddr_perf_event_update,
+ .pmu_enable = cn10k_ddr_perf_pmu_enable,
+ .pmu_disable = cn10k_ddr_perf_pmu_disable,
+ };
+ }
/* Choose this cpu to collect perf data */
ddr_pmu->cpu = raw_smp_processor_id();
if (ret)
goto error;
- pr_info("CN10K DDR PMU Driver for ddrc@%llx\n", res->start);
+ pr_info("DDR PMU Driver for ddrc@%llx\n", res->start);
return 0;
error:
cpuhp_state_remove_instance_nocalls(
#ifdef CONFIG_OF
static const struct of_device_id cn10k_ddr_pmu_of_match[] = {
- { .compatible = "marvell,cn10k-ddr-pmu", },
+ { .compatible = "marvell,cn10k-ddr-pmu", .data = &cn10k_ddr_pmu_pdata },
{ },
};
MODULE_DEVICE_TABLE(of, cn10k_ddr_pmu_of_match);
#ifdef CONFIG_ACPI
static const struct acpi_device_id cn10k_ddr_pmu_acpi_match[] = {
- {"MRVL000A", 0},
+ {"MRVL000A", (kernel_ulong_t)&cn10k_ddr_pmu_pdata },
{},
};
MODULE_DEVICE_TABLE(acpi, cn10k_ddr_pmu_acpi_match);
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