[RESEND PATCH v4 2/3] perf/marvell: perf/marvell: Odyssey DDR Performance
From: Gowthami Thiagarajan
Date: Wed Mar 27 2024 - 03:20:09 EST
Odyssey DRAM Subsystem supports eight counters for monitoring performance
and software can program those counters to monitor any of the defined
performance events. Supported performance events include those counted
at the interface between the DDR controller and the PHY, interface between
the DDR Controller and the CHI interconnect, or within the DDR Controller.
Additionally DSS also supports two fixed performance event counters, one
for ddr reads and the other for ddr writes.
Signed-off-by: Gowthami Thiagarajan <gthiagarajan@xxxxxxxxxxx>
---
drivers/perf/marvell_cn10k_ddr_pmu.c | 246 +++++++++++++++++++++++++++
1 file changed, 246 insertions(+)
diff --git a/drivers/perf/marvell_cn10k_ddr_pmu.c b/drivers/perf/marvell_cn10k_ddr_pmu.c
index d6485c4cf30f..1fd619262d45 100644
--- a/drivers/perf/marvell_cn10k_ddr_pmu.c
+++ b/drivers/perf/marvell_cn10k_ddr_pmu.c
@@ -16,23 +16,28 @@
/* Performance Counters Operating Mode Control Registers */
#define CN10K_DDRC_PERF_CNT_OP_MODE_CTRL 0x8020
+#define ODY_DDRC_PERF_CNT_OP_MODE_CTRL 0x20020
#define OP_MODE_CTRL_VAL_MANUAL 0x1
/* Performance Counters Start Operation Control Registers */
#define CN10K_DDRC_PERF_CNT_START_OP_CTRL 0x8028
+#define ODY_DDRC_PERF_CNT_START_OP_CTRL 0x200A0
#define START_OP_CTRL_VAL_START 0x1ULL
#define START_OP_CTRL_VAL_ACTIVE 0x2
/* Performance Counters End Operation Control Registers */
#define CN10K_DDRC_PERF_CNT_END_OP_CTRL 0x8030
+#define ODY_DDRC_PERF_CNT_END_OP_CTRL 0x200E0
#define END_OP_CTRL_VAL_END 0x1ULL
/* Performance Counters End Status Registers */
#define CN10K_DDRC_PERF_CNT_END_STATUS 0x8038
+#define ODY_DDRC_PERF_CNT_END_STATUS 0x20120
#define END_STATUS_VAL_END_TIMER_MODE_END 0x1
/* Performance Counters Configuration Registers */
#define CN10K_DDRC_PERF_CFG_BASE 0x8040
+#define ODY_DDRC_PERF_CFG_BASE 0x20160
/* 8 Generic event counter + 2 fixed event counters */
#define DDRC_PERF_NUM_GEN_COUNTERS 8
@@ -57,6 +62,13 @@
* program event bitmap in h/w.
*
*/
+#define EVENT_DFI_CMD_IS_RETRY 61
+#define EVENT_RD_UC_ECC_ERROR 60
+#define EVENT_RD_CRC_ERROR 59
+#define EVENT_CAPAR_ERROR 58
+#define EVENT_WR_CRC_ERROR 57
+#define EVENT_DFI_PARITY_POISON 56
+
#define EVENT_OP_IS_ZQLATCH 55
#define EVENT_OP_IS_ZQSTART 54
#define EVENT_OP_IS_TCR_MRR 53
@@ -106,6 +118,7 @@
/* Event counter value registers */
#define CN10K_DDRC_PERF_CNT_VALUE_BASE 0x8080
+#define ODY_DDRC_PERF_CNT_VALUE_BASE 0x201C0
/* Fixed event counter enable/disable register */
#define CN10K_DDRC_PERF_CNT_FREERUN_EN 0x80C0
@@ -114,18 +127,25 @@
/* Fixed event counter control register */
#define CN10K_DDRC_PERF_CNT_FREERUN_CTRL 0x80C8
+#define ODY_DDRC_PERF_CNT_FREERUN_CTRL 0x20240
#define DDRC_FREERUN_WRITE_CNT_CLR 0x1
#define DDRC_FREERUN_READ_CNT_CLR 0x2
+/* Fixed event counter clear register, defined only for Odyssey */
+#define ODY_DDRC_PERF_CNT_FREERUN_CLR 0x20248
+
#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
+#define ODY_DDRC_PERF_CNT_VALUE_WR_OP 0x20250
+#define ODY_DDRC_PERF_CNT_VALUE_RD_OP 0x20258
enum mrvl_ddr_pmu_version {
DDR_PMU_V1 = 1,
+ DDR_PMU_V2,
};
struct ddr_pmu_data {
@@ -249,6 +269,85 @@ static struct attribute *cn10k_ddr_perf_events_attrs[] = {
NULL
};
+static struct attribute *odyssey_ddr_perf_events_attrs[] = {
+ /* Programmable */
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_hif_rd_or_wr_access, EVENT_HIF_RD_OR_WR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_hif_wr_access, EVENT_HIF_WR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_hif_rd_access, EVENT_HIF_RD),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_hif_rmw_access, EVENT_HIF_RMW),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_hif_pri_rdaccess, EVENT_HIF_HI_PRI_RD),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_rd_bypass_access, EVENT_READ_BYPASS),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_act_bypass_access, EVENT_ACT_BYPASS),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_dfi_wr_data_access,
+ EVENT_DFI_WR_DATA_CYCLES),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_dfi_rd_data_access,
+ EVENT_DFI_RD_DATA_CYCLES),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_hpri_sched_rd_crit_access,
+ EVENT_HPR_XACT_WHEN_CRITICAL),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_lpri_sched_rd_crit_access,
+ EVENT_LPR_XACT_WHEN_CRITICAL),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_wr_trxn_crit_access,
+ EVENT_WR_XACT_WHEN_CRITICAL),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_cam_active_access, EVENT_OP_IS_ACTIVATE),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_cam_rd_or_wr_access,
+ EVENT_OP_IS_RD_OR_WR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_cam_rd_active_access,
+ EVENT_OP_IS_RD_ACTIVATE),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_cam_read, EVENT_OP_IS_RD),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_cam_write, EVENT_OP_IS_WR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_cam_mwr, EVENT_OP_IS_MWR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_precharge, EVENT_OP_IS_PRECHARGE),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_precharge_for_rdwr,
+ EVENT_PRECHARGE_FOR_RDWR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_precharge_for_other,
+ EVENT_PRECHARGE_FOR_OTHER),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_rdwr_transitions, EVENT_RDWR_TRANSITIONS),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_write_combine, EVENT_WRITE_COMBINE),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_war_hazard, EVENT_WAR_HAZARD),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_raw_hazard, EVENT_RAW_HAZARD),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_waw_hazard, EVENT_WAW_HAZARD),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_enter_selfref, EVENT_OP_IS_ENTER_SELFREF),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_enter_powerdown,
+ EVENT_OP_IS_ENTER_POWERDOWN),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_enter_mpsm, EVENT_OP_IS_ENTER_MPSM),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_refresh, EVENT_OP_IS_REFRESH),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_crit_ref, EVENT_OP_IS_CRIT_REF),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_spec_ref, EVENT_OP_IS_SPEC_REF),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_load_mode, EVENT_OP_IS_LOAD_MODE),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_zqcl, EVENT_OP_IS_ZQCL),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_cam_wr_access, EVENT_OP_IS_ZQCS),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_dfi_cycles, EVENT_DFI_OR_HPR_REQ_NOCRED),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_retry_fifo_full,
+ EVENT_RETRY_FIFO_FULL_OR_LPR_REQ_NOCRED),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_bsm_alloc, EVENT_BSM_ALLOC),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_bsm_starvation, EVENT_BSM_STARVATION),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_win_limit_reached_rd,
+ EVENT_VISIBLE_WIN_LIMIT_REACHED_RD),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_win_limit_reached_wr,
+ EVENT_VISIBLE_WIN_LIMIT_REACHED_WR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_dqsosc_mpc, EVENT_OP_IS_DQSOSC_MPC),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_dqsosc_mrr, EVENT_OP_IS_DQSOSC_MRR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_tcr_mrr, EVENT_OP_IS_TCR_MRR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_zqstart, EVENT_OP_IS_ZQSTART),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_zqlatch, EVENT_OP_IS_ZQLATCH),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_dfi_parity_poison,
+ EVENT_DFI_PARITY_POISON),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_wr_crc_error, EVENT_WR_CRC_ERROR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_capar_error, EVENT_CAPAR_ERROR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_rd_crc_error, EVENT_RD_CRC_ERROR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_rd_uc_ecc_error, EVENT_RD_UC_ECC_ERROR),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_dfi_cmd_is_retry, EVENT_DFI_CMD_IS_RETRY),
+ /* Free run event counters */
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_ddr_reads, EVENT_DDR_READS),
+ CN10K_DDR_PMU_EVENT_ATTR(ddr_ddr_writes, EVENT_DDR_WRITES),
+ NULL
+};
+
+static struct attribute_group odyssey_ddr_perf_events_attr_group = {
+ .name = "events",
+ .attrs = odyssey_ddr_perf_events_attrs,
+};
+
static struct attribute_group cn10k_ddr_perf_events_attr_group = {
.name = "events",
.attrs = cn10k_ddr_perf_events_attrs,
@@ -294,6 +393,13 @@ static const struct attribute_group *cn10k_attr_groups[] = {
NULL,
};
+static const struct attribute_group *odyssey_attr_groups[] = {
+ &odyssey_ddr_perf_events_attr_group,
+ &cn10k_ddr_perf_format_attr_group,
+ &cn10k_ddr_perf_cpumask_attr_group,
+ NULL
+};
+
/* Default poll timeout is 100 sec, which is very sufficient for
* 48 bit counter incremented max at 5.6 GT/s, which may take many
* hours to overflow.
@@ -314,6 +420,14 @@ static int ddr_perf_get_event_bitmap(int eventid, u64 *event_bitmap,
case EVENT_OP_IS_REFRESH ... EVENT_OP_IS_ZQLATCH:
*event_bitmap = (1ULL << (eventid - 1));
break;
+ case EVENT_DFI_PARITY_POISON ...EVENT_DFI_CMD_IS_RETRY:
+ if (ddr_pmu->version == DDR_PMU_V2) {
+ *event_bitmap = (1ULL << (eventid - 1));
+ } else {
+ pr_err("%s Invalid eventid %d\n", __func__, eventid);
+ return -EINVAL;
+ }
+ break;
case EVENT_OP_IS_ENTER_SELFREF:
case EVENT_OP_IS_ENTER_POWERDOWN:
case EVENT_OP_IS_ENTER_MPSM:
@@ -439,6 +553,7 @@ static u64 cn10k_ddr_perf_read_counter(struct cn10k_ddr_pmu *pmu, int counter)
val = readq_relaxed(pmu->base +
DDRC_PERF_REG(p_data->ddrc_perf_cnt_base, counter));
+
return val;
}
@@ -459,15 +574,43 @@ static void cn10k_ddr_perf_event_update(struct perf_event *event)
local64_add((new_count - prev_count) & mask, &event->count);
}
+static void cn10k_ddr_perf_counter_start(struct cn10k_ddr_pmu *ddr_pmu,
+ int counter)
+{
+ const struct ddr_pmu_platform_data *p_data = ddr_pmu->p_data;
+ u64 ctrl_reg = p_data->ddrc_perf_cnt_start_op_ctrl;
+
+ writeq_relaxed(START_OP_CTRL_VAL_START, ddr_pmu->base +
+ DDRC_PERF_REG(ctrl_reg, counter));
+}
+
+static void cn10k_ddr_perf_counter_stop(struct cn10k_ddr_pmu *ddr_pmu,
+ int counter)
+{
+ const struct ddr_pmu_platform_data *p_data = ddr_pmu->p_data;
+ u64 ctrl_reg = p_data->ddrc_perf_cnt_end_op_ctrl;
+
+ writeq_relaxed(END_OP_CTRL_VAL_END, ddr_pmu->base +
+ DDRC_PERF_REG(ctrl_reg, counter));
+}
+
static void cn10k_ddr_perf_event_start(struct perf_event *event, int flags)
{
struct cn10k_ddr_pmu *pmu = to_cn10k_ddr_pmu(event->pmu);
+ u64 ctrl_reg = pmu->p_data->ddrc_perf_cnt_op_mode_ctrl;
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
local64_set(&hwc->prev_count, 0);
cn10k_ddr_perf_counter_enable(pmu, counter, true);
+ if (pmu->version == DDR_PMU_V2) {
+ /* Setup the PMU counter to work in manual mode */
+ writeq_relaxed(OP_MODE_CTRL_VAL_MANUAL, pmu->base +
+ DDRC_PERF_REG(ctrl_reg, counter));
+
+ cn10k_ddr_perf_counter_start(pmu, counter);
+ }
hwc->state = 0;
}
@@ -526,6 +669,9 @@ static void cn10k_ddr_perf_event_stop(struct perf_event *event, int flags)
cn10k_ddr_perf_counter_enable(pmu, counter, false);
+ if (pmu->version == DDR_PMU_V2)
+ cn10k_ddr_perf_counter_stop(pmu, counter);
+
if (flags & PERF_EF_UPDATE)
cn10k_ddr_perf_event_update(event);
@@ -642,6 +788,61 @@ static void ddr_pmu_overflow_hander(struct cn10k_ddr_pmu *pmu, int evt_idx)
cn10k_ddr_perf_pmu_enable(&pmu->pmu);
}
+static void ddr_pmu_v2_enable_read_freerun(struct cn10k_ddr_pmu *pmu,
+ bool enable)
+{
+ const struct ddr_pmu_platform_data *p_data = pmu->p_data;
+ u64 val;
+
+ val = readq_relaxed(pmu->base + p_data->ddrc_perf_cnt_freerun_ctrl);
+ if (enable)
+ val |= DDRC_PERF_FREERUN_READ_EN;
+ else
+ val &= ~DDRC_PERF_FREERUN_READ_EN;
+
+ writeq_relaxed(val, pmu->base + p_data->ddrc_perf_cnt_freerun_ctrl);
+}
+
+static void ddr_pmu_v2_enable_write_freerun(struct cn10k_ddr_pmu *pmu,
+ bool enable)
+{
+ const struct ddr_pmu_platform_data *p_data = pmu->p_data;
+ u64 val;
+
+ val = readq_relaxed(pmu->base + p_data->ddrc_perf_cnt_freerun_ctrl);
+ if (enable)
+ val |= DDRC_PERF_FREERUN_WRITE_EN;
+ else
+ val &= ~DDRC_PERF_FREERUN_WRITE_EN;
+
+ writeq_relaxed(val, pmu->base + p_data->ddrc_perf_cnt_freerun_ctrl);
+}
+
+static void ddr_pmu_v2_read_clear_freerun(struct cn10k_ddr_pmu *pmu)
+{
+ const struct ddr_pmu_platform_data *p_data = pmu->p_data;
+ u64 val;
+
+ val = DDRC_FREERUN_READ_CNT_CLR;
+ writeq_relaxed(val, pmu->base + p_data->ddrc_perf_cnt_freerun_clr);
+}
+
+static void ddr_pmu_v2_write_clear_freerun(struct cn10k_ddr_pmu *pmu)
+{
+ const struct ddr_pmu_platform_data *p_data = pmu->p_data;
+ u64 val;
+
+ val = DDRC_FREERUN_WRITE_CNT_CLR;
+ writeq_relaxed(val, pmu->base + p_data->ddrc_perf_cnt_freerun_clr);
+}
+
+static void ddr_pmu_v2_overflow_hander(struct cn10k_ddr_pmu *pmu, int evt_idx)
+{
+ cn10k_ddr_perf_event_update(pmu->events[evt_idx]);
+ cn10k_ddr_perf_counter_stop(pmu, evt_idx);
+ cn10k_ddr_perf_counter_start(pmu, evt_idx);
+}
+
static irqreturn_t cn10k_ddr_pmu_overflow_handler(struct cn10k_ddr_pmu *pmu)
{
const struct ddr_pmu_platform_data *p_data = pmu->p_data;
@@ -753,6 +954,35 @@ static const struct ddr_pmu_data ddr_pmu_data = {
.id = DDR_PMU_V1,
};
+static const struct ddr_pmu_ops ddr_pmu_v2_ops = {
+ .enable_read_freerun_counter = ddr_pmu_v2_enable_read_freerun,
+ .enable_write_freerun_counter = ddr_pmu_v2_enable_write_freerun,
+ .clear_read_freerun_counter = ddr_pmu_v2_read_clear_freerun,
+ .clear_write_freerun_counter = ddr_pmu_v2_write_clear_freerun,
+ .pmu_overflow_handler = ddr_pmu_v2_overflow_hander,
+};
+
+static const struct ddr_pmu_platform_data odyssey_ddr_pmu_pdata = {
+ .counter_overflow_val = 0,
+ .counter_max_val = GENMASK_ULL(63, 0),
+ .ddrc_perf_cnt_base = ODY_DDRC_PERF_CNT_VALUE_BASE,
+ .ddrc_perf_cfg_base = ODY_DDRC_PERF_CFG_BASE,
+ .ddrc_perf_cnt_op_mode_ctrl = ODY_DDRC_PERF_CNT_OP_MODE_CTRL,
+ .ddrc_perf_cnt_start_op_ctrl = ODY_DDRC_PERF_CNT_START_OP_CTRL,
+ .ddrc_perf_cnt_end_op_ctrl = ODY_DDRC_PERF_CNT_END_OP_CTRL,
+ .ddrc_perf_cnt_end_status = ODY_DDRC_PERF_CNT_END_STATUS,
+ .ddrc_perf_cnt_freerun_en = 0,
+ .ddrc_perf_cnt_freerun_ctrl = ODY_DDRC_PERF_CNT_FREERUN_CTRL,
+ .ddrc_perf_cnt_freerun_clr = ODY_DDRC_PERF_CNT_FREERUN_CLR,
+ .ddrc_perf_cnt_value_wr_op = ODY_DDRC_PERF_CNT_VALUE_WR_OP,
+ .ddrc_perf_cnt_value_rd_op = ODY_DDRC_PERF_CNT_VALUE_RD_OP,
+ .ops = &ddr_pmu_v2_ops,
+};
+
+static const struct ddr_pmu_data ddr_pmu_v2_data = {
+ .id = DDR_PMU_V2,
+};
+
static int cn10k_ddr_perf_probe(struct platform_device *pdev)
{
const struct ddr_pmu_data *dev_data;
@@ -805,6 +1035,21 @@ static int cn10k_ddr_perf_probe(struct platform_device *pdev)
};
ddr_pmu->p_data = &cn10k_ddr_pmu_pdata;
+ } else {
+ ddr_pmu->pmu = (struct pmu) {
+ .module = THIS_MODULE,
+ .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
+ .task_ctx_nr = perf_invalid_context,
+ .attr_groups = odyssey_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,
+ };
+
+ ddr_pmu->p_data = &odyssey_ddr_pmu_pdata;
}
/* Choose this cpu to collect perf data */
@@ -858,6 +1103,7 @@ MODULE_DEVICE_TABLE(of, cn10k_ddr_pmu_of_match);
#ifdef CONFIG_ACPI
static const struct acpi_device_id cn10k_ddr_pmu_acpi_match[] = {
{"MRVL000A", (kernel_ulong_t)&ddr_pmu_data},
+ {"MRVL000C", (kernel_ulong_t)&ddr_pmu_v2_data},
{},
};
MODULE_DEVICE_TABLE(acpi, cn10k_ddr_pmu_acpi_match);
--
2.25.1