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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: marvell.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: CO6PR18MB4465.namprd18.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 40d12eb4-3b52-47df-80b8-08d98d568064 X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Oct 2021 08:01:30.7642 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 70e1fb47-1155-421d-87fc-2e58f638b6e0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: oGNpXQQXNTTsPAvlPChe3bD31CSs2XDrwVy6gqctDlfsimVmTqH8gWXXHm+2rK4G9Z9kyM6rU70FS8JwJoffTA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1PR18MB4697 X-Proofpoint-ORIG-GUID: UwtzdNZvE3jd5fqXeDv8DnmEnGx8bPHS X-Proofpoint-GUID: UwtzdNZvE3jd5fqXeDv8DnmEnGx8bPHS X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.182.1,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.0.607.475 definitions=2021-10-12_01,2021-10-11_01,2020-04-07_01 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding Bhaskara > -----Original Message----- > From: Bharat Bhushan > Sent: Monday, September 20, 2021 10:38 AM > To: will@kernel.org; mark.rutland@arm.com; robh+dt@kernel.org; linux-arm- > kernel@lists.infradead.org; devicetree@vger.kernel.org; linux- > kernel@vger.kernel.org > Cc: Bharat Bhushan > Subject: [PATCH v4 2/4] perf/marvell: CN10k DDR performance monitor suppo= rt >=20 > Marvell CN10k DRAM Subsystem (DSS) supports eight event counters for > monitoring performance and software can program each counter to monitor a= ny > of the defined performance event. Performance events are for interface be= tween > 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 > number of ddr reads and other for ddr writes. >=20 > This patch add basic support for these performance monitoring events on C= N10k. >=20 > Signed-off-by: Bharat Bhushan > --- > v3->v4: > - No Change >=20 > v2->v3: > - Add COMPILE_TEST as a dependency > - Switch to sysfs_emit() > - Error propagation when invalif event requested > - Switch to devm_platform_get_and_ioremap_resource() > - Other review comments on v2. >=20 > v1->v2: > - writeq/readq changed to respective relaxed version > - Using PMU_EVENT_ATTR_ID >=20 > drivers/perf/Kconfig | 7 + > drivers/perf/Makefile | 1 + > drivers/perf/marvell_cn10k_ddr_pmu.c | 599 +++++++++++++++++++++++++++ > 3 files changed, 607 insertions(+) > create mode 100644 drivers/perf/marvell_cn10k_ddr_pmu.c >=20 > diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig index > 77522e5efe11..41a80a4b8d29 100644 > --- a/drivers/perf/Kconfig > +++ b/drivers/perf/Kconfig > @@ -139,4 +139,11 @@ config ARM_DMC620_PMU >=20 > source "drivers/perf/hisilicon/Kconfig" >=20 > +config MARVELL_CN10K_DDR_PMU > + tristate "Enable MARVELL CN10K DRAM Subsystem(DSS) PMU Support" > + depends on ARM64 > + help > + Enable perf support for Marvell DDR Performance monitoring > + event on CN10K platform. > + > endmenu > diff --git a/drivers/perf/Makefile b/drivers/perf/Makefile index > 5260b116c7da..ee1126219d8d 100644 > --- a/drivers/perf/Makefile > +++ b/drivers/perf/Makefile > @@ -14,3 +14,4 @@ obj-$(CONFIG_THUNDERX2_PMU) +=3D thunderx2_pmu.o > obj-$(CONFIG_XGENE_PMU) +=3D xgene_pmu.o > obj-$(CONFIG_ARM_SPE_PMU) +=3D arm_spe_pmu.o > obj-$(CONFIG_ARM_DMC620_PMU) +=3D arm_dmc620_pmu.o > +obj-$(CONFIG_MARVELL_CN10K_DDR_PMU) +=3D marvell_cn10k_ddr_pmu.o > diff --git a/drivers/perf/marvell_cn10k_ddr_pmu.c > b/drivers/perf/marvell_cn10k_ddr_pmu.c > new file mode 100644 > index 000000000000..9b6d5e716b94 > --- /dev/null > +++ b/drivers/perf/marvell_cn10k_ddr_pmu.c > @@ -0,0 +1,599 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* Marvell CN10K DRAM Subsystem (DSS) Performance Monitor Driver > + * > + * Copyright (C) 2021 Marvell. > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +/* Performance Counters Operating Mode Control Registers */ > +#define DDRC_PERF_CNT_OP_MODE_CTRL 0x8020 > +#define OP_MODE_CTRL_VAL_MANNUAL 0x1 > + > +/* Performance Counters Start Operation Control Registers */ > +#define 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 END_OP_CTRL_VAL_END 0x1ULL > + > +/* Performance Counters End Status Registers */ > +#define 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 > + > +/* 8 Generic event counter + 2 fixed event counters */ > +#define DDRC_PERF_NUM_GEN_COUNTERS 8 > +#define DDRC_PERF_NUM_FIX_COUNTERS 2 > +#define DDRC_PERF_READ_COUNTER_IDX > DDRC_PERF_NUM_GEN_COUNTERS > +#define DDRC_PERF_WRITE_COUNTER_IDX > (DDRC_PERF_NUM_GEN_COUNTERS + 1) > +#define DDRC_PERF_NUM_COUNTERS > (DDRC_PERF_NUM_GEN_COUNTERS + \ > + DDRC_PERF_NUM_FIX_COUNTERS) > + > +/* Generic event counter registers */ > +#define DDRC_PERF_CFG(n) (DDRC_PERF_CFG_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 > + > +/* > + * programmable events IDs in programmable event counters. > + * DO NOT change these event-id numbers, they are used to > + * program event bitmap in h/w. > + */ > +#define EVENT_OP_IS_ZQLATCH 55 > +#define EVENT_OP_IS_ZQSTART 54 > +#define EVENT_OP_IS_TCR_MRR 53 > +#define EVENT_OP_IS_DQSOSC_MRR 52 > +#define EVENT_OP_IS_DQSOSC_MPC 51 > +#define EVENT_VISIBLE_WIN_LIMIT_REACHED_WR 50 > +#define EVENT_VISIBLE_WIN_LIMIT_REACHED_RD 49 > +#define EVENT_BSM_STARVATION 48 > +#define EVENT_BSM_ALLOC 47 > +#define EVENT_LPR_REQ_WITH_NOCREDIT 46 > +#define EVENT_HPR_REQ_WITH_NOCREDIT 45 > +#define EVENT_OP_IS_ZQCS 44 > +#define EVENT_OP_IS_ZQCL 43 > +#define EVENT_OP_IS_LOAD_MODE 42 > +#define EVENT_OP_IS_SPEC_REF 41 > +#define EVENT_OP_IS_CRIT_REF 40 > +#define EVENT_OP_IS_REFRESH 39 > +#define EVENT_OP_IS_ENTER_MPSM 35 > +#define EVENT_OP_IS_ENTER_POWERDOWN 31 > +#define EVENT_OP_IS_ENTER_SELFREF 27 > +#define EVENT_WAW_HAZARD 26 > +#define EVENT_RAW_HAZARD 25 > +#define EVENT_WAR_HAZARD 24 > +#define EVENT_WRITE_COMBINE 23 > +#define EVENT_RDWR_TRANSITIONS 22 > +#define EVENT_PRECHARGE_FOR_OTHER 21 > +#define EVENT_PRECHARGE_FOR_RDWR 20 > +#define EVENT_OP_IS_PRECHARGE 19 > +#define EVENT_OP_IS_MWR 18 > +#define EVENT_OP_IS_WR 17 > +#define EVENT_OP_IS_RD 16 > +#define EVENT_OP_IS_RD_ACTIVATE 15 > +#define EVENT_OP_IS_RD_OR_WR 14 > +#define EVENT_OP_IS_ACTIVATE 13 > +#define EVENT_WR_XACT_WHEN_CRITICAL 12 > +#define EVENT_LPR_XACT_WHEN_CRITICAL 11 > +#define EVENT_HPR_XACT_WHEN_CRITICAL 10 > +#define EVENT_DFI_RD_DATA_CYCLES 9 > +#define EVENT_DFI_WR_DATA_CYCLES 8 > +#define EVENT_ACT_BYPASS 7 > +#define EVENT_READ_BYPASS 6 > +#define EVENT_HIF_HI_PRI_RD 5 > +#define EVENT_HIF_RMW 4 > +#define EVENT_HIF_RD 3 > +#define EVENT_HIF_WR 2 > +#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)) > + > +/* Fixed event counter enable/disable register */ > +#define 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 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) > + > +struct cn10k_ddr_pmu { > + struct pmu pmu; > + void __iomem *base; > + unsigned int cpu; > + struct device *dev; > + int active_events; > + struct perf_event *events[DDRC_PERF_NUM_COUNTERS]; }; > + > +#define to_cn10k_ddr_pmu(p) container_of(p, struct cn10k_ddr_pmu, > pmu) > + > +static ssize_t cn10k_ddr_pmu_event_show(struct device *dev, > + struct device_attribute *attr, > + char *page) > +{ > + struct perf_pmu_events_attr *pmu_attr; > + > + pmu_attr =3D container_of(attr, struct perf_pmu_events_attr, attr); > + return sysfs_emit(page, "event=3D0x%02llx\n", pmu_attr->id); > + > +} > + > +#define CN10K_DDR_PMU_EVENT_ATTR(_name, _id) > \ > + PMU_EVENT_ATTR_ID(_name, cn10k_ddr_pmu_event_show, _id) > + > +static struct attribute *cn10k_ddr_perf_events_attrs[] =3D { > + 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_dif_wr_data_access, > EVENT_DFI_WR_DATA_CYCLES), > + CN10K_DDR_PMU_EVENT_ATTR(ddr_dif_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_hpr_req_with_nocredit, > + EVENT_HPR_REQ_WITH_NOCREDIT), > + CN10K_DDR_PMU_EVENT_ATTR(ddr_lpr_req_with_nocredit, > + EVENT_LPR_REQ_WITH_NOCREDIT), > + 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), > + /* 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 cn10k_ddr_perf_events_attr_group =3D { > + .name =3D "events", > + .attrs =3D cn10k_ddr_perf_events_attrs, > +}; > + > +PMU_FORMAT_ATTR(event, "config:0-8"); > + > +static struct attribute *cn10k_ddr_perf_format_attrs[] =3D { > + &format_attr_event.attr, > + NULL, > +}; > + > +static struct attribute_group cn10k_ddr_perf_format_attr_group =3D { > + .name =3D "format", > + .attrs =3D cn10k_ddr_perf_format_attrs, > +}; > + > +static ssize_t cn10k_ddr_perf_cpumask_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct cn10k_ddr_pmu *pmu =3D dev_get_drvdata(dev); > + > + return cpumap_print_to_pagebuf(true, buf, cpumask_of(pmu->cpu)); } > + > +static struct device_attribute cn10k_ddr_perf_cpumask_attr =3D > + __ATTR(cpumask, 0444, cn10k_ddr_perf_cpumask_show, NULL); > + > +static struct attribute *cn10k_ddr_perf_cpumask_attrs[] =3D { > + &cn10k_ddr_perf_cpumask_attr.attr, > + NULL, > +}; > + > +static struct attribute_group cn10k_ddr_perf_cpumask_attr_group =3D { > + .attrs =3D cn10k_ddr_perf_cpumask_attrs, }; > + > +static const struct attribute_group *cn10k_attr_groups[] =3D { > + &cn10k_ddr_perf_events_attr_group, > + &cn10k_ddr_perf_format_attr_group, > + &cn10k_ddr_perf_cpumask_attr_group, > + NULL, > +}; > + > +static int ddr_perf_get_event_bitmap(int eventid, u64 *event_bitmap) { > + switch (eventid) { > + case EVENT_HIF_RD_OR_WR ... EVENT_WAW_HAZARD: > + case EVENT_OP_IS_REFRESH ... EVENT_OP_IS_ZQLATCH: > + *event_bitmap =3D (1ULL << (eventid - 1)); > + break; > + case EVENT_OP_IS_ENTER_SELFREF: > + case EVENT_OP_IS_ENTER_POWERDOWN: > + case EVENT_OP_IS_ENTER_MPSM: > + *event_bitmap =3D (0xFULL << (eventid - 1)); > + break; > + default: > + pr_err("%s Invalid eventid %d\n", __func__, eventid); > + return -EINVAL; > + } > + > + return 0; > +} > + > +static int cn10k_ddr_perf_alloc_counter(struct cn10k_ddr_pmu *pmu, > + struct perf_event *event) > +{ > + u8 config =3D event->attr.config; > + int i; > + > + /* DDR read free-run counter index */ > + if (config =3D=3D EVENT_DDR_READS) { > + pmu->events[DDRC_PERF_READ_COUNTER_IDX] =3D event; > + return DDRC_PERF_READ_COUNTER_IDX; > + } > + > + /* DDR write free-run counter index */ > + if (config =3D=3D EVENT_DDR_WRITES) { > + pmu->events[DDRC_PERF_WRITE_COUNTER_IDX] =3D event; > + return DDRC_PERF_WRITE_COUNTER_IDX; > + } > + > + /* Allocate DDR generic counters */ > + for (i =3D 0; i < DDRC_PERF_NUM_GEN_COUNTERS; i++) { > + if (pmu->events[i] =3D=3D NULL) { > + pmu->events[i] =3D event; > + return i; > + } > + } > + > + return -ENOENT; > +} > + > +static void cn10k_ddr_perf_free_counter(struct cn10k_ddr_pmu *pmu, int > +counter) { > + pmu->events[counter] =3D NULL; > +} > + > +static int cn10k_ddr_perf_event_init(struct perf_event *event) { > + struct cn10k_ddr_pmu *pmu =3D to_cn10k_ddr_pmu(event->pmu); > + struct hw_perf_event *hwc =3D &event->hw; > + > + if (event->attr.type !=3D event->pmu->type) > + return -ENOENT; > + > + if (is_sampling_event(event)) { > + dev_info(pmu->dev, "Sampling not supported!\n"); > + return -EOPNOTSUPP; > + } > + > + if (event->cpu < 0) { > + dev_warn(pmu->dev, "Can't provide per-task data!\n"); > + return -EOPNOTSUPP; > + } > + > + /* We must NOT create groups containing mixed PMUs */ > + if (event->group_leader->pmu !=3D event->pmu && > + !is_software_event(event->group_leader)) > + return -EINVAL; > + > + /* Set ownership of event to one CPU, same event can not be observed > + * on multiple cpus at same time. > + */ > + event->cpu =3D pmu->cpu; > + hwc->idx =3D -1; > + return 0; > +} > + > +static void cn10k_ddr_perf_counter_enable(struct cn10k_ddr_pmu *pmu, > + int counter, bool enable) > +{ > + u32 reg; > + u64 val; > + > + if (counter > DDRC_PERF_NUM_COUNTERS) { > + pr_err("Error: unsupported counter %d\n", counter); > + return; > + } > + > + if (counter < DDRC_PERF_NUM_GEN_COUNTERS) { > + reg =3D DDRC_PERF_CFG(counter); > + val =3D readq_relaxed(pmu->base + reg); > + > + if (enable) > + val |=3D EVENT_ENABLE; > + else > + val &=3D ~EVENT_ENABLE; > + > + writeq_relaxed(val, pmu->base + reg); > + } else { > + val =3D readq_relaxed(pmu->base + > DDRC_PERF_CNT_FREERUN_EN); > + if (enable) { > + if (counter =3D=3D DDRC_PERF_READ_COUNTER_IDX) > + val |=3D DDRC_PERF_FREERUN_READ_EN; > + else > + val |=3D DDRC_PERF_FREERUN_WRITE_EN; > + } else { > + if (counter =3D=3D DDRC_PERF_READ_COUNTER_IDX) > + val &=3D ~DDRC_PERF_FREERUN_READ_EN; > + else > + val &=3D ~DDRC_PERF_FREERUN_WRITE_EN; > + } > + writeq_relaxed(val, pmu->base + > DDRC_PERF_CNT_FREERUN_EN); > + } > +} > + > +static u64 cn10k_ddr_perf_read_counter(struct cn10k_ddr_pmu *pmu, int > +counter) { > + u64 val; > + > + if (counter =3D=3D DDRC_PERF_READ_COUNTER_IDX) > + return readq_relaxed(pmu->base + > DDRC_PERF_CNT_VALUE_RD_OP); > + > + if (counter =3D=3D DDRC_PERF_WRITE_COUNTER_IDX) > + return readq_relaxed(pmu->base + > DDRC_PERF_CNT_VALUE_WR_OP); > + > + val =3D readq_relaxed(pmu->base + DDRC_PERF_CNT_VALUE(counter)); > + return val; > +} > + > +static void cn10k_ddr_perf_event_update(struct perf_event *event) { > + struct cn10k_ddr_pmu *pmu =3D to_cn10k_ddr_pmu(event->pmu); > + struct hw_perf_event *hwc =3D &event->hw; > + u64 prev_count, new_count, mask; > + > + do { > + prev_count =3D local64_read(&hwc->prev_count); > + new_count =3D cn10k_ddr_perf_read_counter(pmu, hwc->idx); > + } while (local64_xchg(&hwc->prev_count, new_count) !=3D prev_count); > + > + mask =3D DDRC_PERF_CNT_MAX_VALUE; > + > + local64_add((new_count - prev_count) & mask, &event->count); } > + > +static void cn10k_ddr_perf_event_start(struct perf_event *event, int > +flags) { > + struct cn10k_ddr_pmu *pmu =3D to_cn10k_ddr_pmu(event->pmu); > + struct hw_perf_event *hwc =3D &event->hw; > + int counter =3D hwc->idx; > + > + local64_set(&hwc->prev_count, 0); > + > + cn10k_ddr_perf_counter_enable(pmu, counter, true); > + > + hwc->state =3D 0; > +} > + > +static int cn10k_ddr_perf_event_add(struct perf_event *event, int > +flags) { > + struct cn10k_ddr_pmu *pmu =3D to_cn10k_ddr_pmu(event->pmu); > + struct hw_perf_event *hwc =3D &event->hw; > + u8 config =3D event->attr.config; > + int counter, ret; > + u32 reg_offset; > + u64 val; > + > + counter =3D cn10k_ddr_perf_alloc_counter(pmu, event); > + if (counter < 0) > + return -EAGAIN; > + > + pmu->active_events++; > + hwc->idx =3D counter; > + > + if (counter < DDRC_PERF_NUM_GEN_COUNTERS) { > + /* Generic counters, configure event id */ > + reg_offset =3D DDRC_PERF_CFG(counter); > + ret =3D ddr_perf_get_event_bitmap(config, &val); > + if (ret) > + return ret; > + > + writeq_relaxed(val, pmu->base + reg_offset); > + } else { > + /* fixed event counter, clear counter value */ > + if (counter =3D=3D DDRC_PERF_READ_COUNTER_IDX) > + val =3D DDRC_FREERUN_READ_CNT_CLR; > + else > + val =3D DDRC_FREERUN_WRITE_CNT_CLR; > + > + writeq_relaxed(val, pmu->base + > DDRC_PERF_CNT_FREERUN_CTRL); > + } > + > + hwc->state |=3D PERF_HES_STOPPED; > + > + if (flags & PERF_EF_START) > + cn10k_ddr_perf_event_start(event, flags); > + > + return 0; > +} > + > +static void cn10k_ddr_perf_event_stop(struct perf_event *event, int > +flags) { > + struct cn10k_ddr_pmu *pmu =3D to_cn10k_ddr_pmu(event->pmu); > + struct hw_perf_event *hwc =3D &event->hw; > + int counter =3D hwc->idx; > + > + cn10k_ddr_perf_counter_enable(pmu, counter, false); > + > + if (flags & PERF_EF_UPDATE) > + cn10k_ddr_perf_event_update(event); > + > + hwc->state |=3D PERF_HES_STOPPED; > +} > + > +static void cn10k_ddr_perf_event_del(struct perf_event *event, int > +flags) { > + struct cn10k_ddr_pmu *pmu =3D to_cn10k_ddr_pmu(event->pmu); > + struct hw_perf_event *hwc =3D &event->hw; > + int counter =3D hwc->idx; > + > + cn10k_ddr_perf_event_stop(event, PERF_EF_UPDATE); > + > + cn10k_ddr_perf_free_counter(pmu, counter); > + pmu->active_events--; > + hwc->idx =3D -1; > +} > + > +static void cn10k_ddr_perf_pmu_enable(struct pmu *pmu) { > + struct cn10k_ddr_pmu *ddr_pmu =3D to_cn10k_ddr_pmu(pmu); > + > + writeq_relaxed(START_OP_CTRL_VAL_START, ddr_pmu->base + > + DDRC_PERF_CNT_START_OP_CTRL); > +} > + > +static void cn10k_ddr_perf_pmu_disable(struct pmu *pmu) { > + struct cn10k_ddr_pmu *ddr_pmu =3D to_cn10k_ddr_pmu(pmu); > + > + writeq_relaxed(END_OP_CTRL_VAL_END, ddr_pmu->base + > + DDRC_PERF_CNT_END_OP_CTRL); > +} > + > +static int cn10k_ddr_perf_probe(struct platform_device *pdev) { > + struct cn10k_ddr_pmu *ddr_pmu; > + struct resource *res; > + void __iomem *base; > + char *name; > + int ret; > + > + ddr_pmu =3D devm_kzalloc(&pdev->dev, sizeof(*ddr_pmu), GFP_KERNEL); > + if (!ddr_pmu) > + return -ENOMEM; > + > + ddr_pmu->dev =3D &pdev->dev; > + platform_set_drvdata(pdev, ddr_pmu); > + > + base =3D devm_platform_get_and_ioremap_resource(pdev, 0, &res); > + if (IS_ERR(base)) > + return PTR_ERR(base); > + > + ddr_pmu->base =3D 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 =3D (struct pmu) { > + .module =3D THIS_MODULE, > + .capabilities =3D PERF_PMU_CAP_NO_EXCLUDE, > + .task_ctx_nr =3D perf_invalid_context, > + .attr_groups =3D cn10k_attr_groups, > + .event_init =3D cn10k_ddr_perf_event_init, > + .add =3D cn10k_ddr_perf_event_add, > + .del =3D cn10k_ddr_perf_event_del, > + .start =3D cn10k_ddr_perf_event_start, > + .stop =3D cn10k_ddr_perf_event_stop, > + .read =3D cn10k_ddr_perf_event_update, > + .pmu_enable =3D cn10k_ddr_perf_pmu_enable, > + .pmu_disable =3D cn10k_ddr_perf_pmu_disable, > + }; > + > + /* Choose this cpu to collect perf data */ > + ddr_pmu->cpu =3D raw_smp_processor_id(); > + > + name =3D devm_kasprintf(ddr_pmu->dev, GFP_KERNEL, > "mrvl_ddr_pmu_%llx", > + res->start); > + if (!name) > + return -ENOMEM; > + > + ret =3D perf_pmu_register(&ddr_pmu->pmu, name, -1); > + if (ret) > + return ret; > + > + pr_info("CN10K DDR PMU Driver for ddrc@%llx\n", res->start); > + return 0; > +} > + > +static int cn10k_ddr_perf_remove(struct platform_device *pdev) { > + struct cn10k_ddr_pmu *ddr_pmu =3D platform_get_drvdata(pdev); > + > + perf_pmu_unregister(&ddr_pmu->pmu); > + return 0; > +} > + > +static const struct of_device_id cn10k_ddr_pmu_of_match[] =3D { > + { .compatible =3D "marvell,cn10k-ddr-pmu", }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, cn10k_ddr_pmu_of_match); > + > +static struct platform_driver cn10k_ddr_pmu_driver =3D { > + .driver =3D { > + .name =3D "cn10k-ddr-pmu", > + .of_match_table =3D cn10k_ddr_pmu_of_match, > + .suppress_bind_attrs =3D true, > + }, > + .probe =3D cn10k_ddr_perf_probe, > + .remove =3D cn10k_ddr_perf_remove, > +}; > + > +static int __init cn10k_ddr_pmu_init(void) { > + return platform_driver_register(&cn10k_ddr_pmu_driver); > +} > + > +static void __exit cn10k_ddr_pmu_exit(void) { > + platform_driver_unregister(&cn10k_ddr_pmu_driver); > +} > + > +module_init(cn10k_ddr_pmu_init); > +module_exit(cn10k_ddr_pmu_exit); > + > +MODULE_AUTHOR("Bharat Bhushan "); > +MODULE_LICENSE("GPL v2"); > -- > 2.17.1