Messages in this thread Patch in this message | | | From | Jan Glauber <> | Subject | [PATCH v2 4/5] arm64/perf: Cavium ThunderX LMC uncore support | Date | Wed, 9 Mar 2016 17:21:06 +0100 |
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Support counters on the DRAM controllers.
Also support pass2 added counters by checking MIDR.
Signed-off-by: Jan Glauber <jglauber@cavium.com> --- drivers/perf/uncore/Makefile | 3 +- drivers/perf/uncore/uncore_cavium.c | 3 + drivers/perf/uncore/uncore_cavium.h | 4 + drivers/perf/uncore/uncore_cavium_lmc.c | 196 ++++++++++++++++++++++++++++++++ 4 files changed, 205 insertions(+), 1 deletion(-) create mode 100644 drivers/perf/uncore/uncore_cavium_lmc.c
diff --git a/drivers/perf/uncore/Makefile b/drivers/perf/uncore/Makefile index d52ecc9..81479e8 100644 --- a/drivers/perf/uncore/Makefile +++ b/drivers/perf/uncore/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_ARCH_THUNDER) += uncore_cavium.o \ uncore_cavium_l2c_tad.o \ - uncore_cavium_l2c_cbc.o + uncore_cavium_l2c_cbc.o \ + uncore_cavium_lmc.o diff --git a/drivers/perf/uncore/uncore_cavium.c b/drivers/perf/uncore/uncore_cavium.c index a230450..45c81d0 100644 --- a/drivers/perf/uncore/uncore_cavium.c +++ b/drivers/perf/uncore/uncore_cavium.c @@ -19,6 +19,8 @@ struct thunder_uncore *event_to_thunder_uncore(struct perf_event *event) return thunder_uncore_l2c_tad; else if (event->pmu->type == thunder_l2c_cbc_pmu.type) return thunder_uncore_l2c_cbc; + else if (event->pmu->type == thunder_lmc_pmu.type) + return thunder_uncore_lmc; else return NULL; } @@ -303,6 +305,7 @@ static int __init thunder_uncore_init(void) thunder_uncore_l2c_tad_setup(); thunder_uncore_l2c_cbc_setup(); + thunder_uncore_lmc_setup(); return 0; } late_initcall(thunder_uncore_init); diff --git a/drivers/perf/uncore/uncore_cavium.h b/drivers/perf/uncore/uncore_cavium.h index 94bd02c..f14f6be 100644 --- a/drivers/perf/uncore/uncore_cavium.h +++ b/drivers/perf/uncore/uncore_cavium.h @@ -9,6 +9,7 @@ enum uncore_type { L2C_TAD_TYPE, L2C_CBC_TYPE, + LMC_TYPE, }; extern int thunder_uncore_version; @@ -68,8 +69,10 @@ extern struct device_attribute format_attr_node; extern struct thunder_uncore *thunder_uncore_l2c_tad; extern struct thunder_uncore *thunder_uncore_l2c_cbc; +extern struct thunder_uncore *thunder_uncore_lmc; extern struct pmu thunder_l2c_tad_pmu; extern struct pmu thunder_l2c_cbc_pmu; +extern struct pmu thunder_lmc_pmu; /* Prototypes */ struct thunder_uncore *event_to_thunder_uncore(struct perf_event *event); @@ -85,3 +88,4 @@ ssize_t thunder_events_sysfs_show(struct device *dev, int thunder_uncore_l2c_tad_setup(void); int thunder_uncore_l2c_cbc_setup(void); +int thunder_uncore_lmc_setup(void); diff --git a/drivers/perf/uncore/uncore_cavium_lmc.c b/drivers/perf/uncore/uncore_cavium_lmc.c new file mode 100644 index 0000000..b8d21b4 --- /dev/null +++ b/drivers/perf/uncore/uncore_cavium_lmc.c @@ -0,0 +1,196 @@ +/* + * Cavium Thunder uncore PMU support, LMC counters. + * + * Copyright 2016 Cavium Inc. + * Author: Jan Glauber <jan.glauber@cavium.com> + */ + +#include <linux/slab.h> +#include <linux/perf_event.h> + +#include "uncore_cavium.h" + +#ifndef PCI_DEVICE_ID_THUNDER_LMC +#define PCI_DEVICE_ID_THUNDER_LMC 0xa022 +#endif + +#define LMC_NR_COUNTERS 3 +#define LMC_PASS2_NR_COUNTERS 5 +#define LMC_MAX_NR_COUNTERS LMC_PASS2_NR_COUNTERS + +/* LMC event list */ +#define LMC_EVENT_IFB_CNT 0 +#define LMC_EVENT_OPS_CNT 1 +#define LMC_EVENT_DCLK_CNT 2 + +/* pass 2 added counters */ +#define LMC_EVENT_BANK_CONFLICT1 3 +#define LMC_EVENT_BANK_CONFLICT2 4 + +#define LMC_COUNTER_START LMC_EVENT_IFB_CNT +#define LMC_COUNTER_END (LMC_EVENT_BANK_CONFLICT2 + 8) + +struct thunder_uncore *thunder_uncore_lmc; + +int lmc_events[LMC_MAX_NR_COUNTERS] = { 0x1d0, 0x1d8, 0x1e0, 0x360, 0x368 }; + +static void thunder_uncore_start(struct perf_event *event, int flags) +{ + struct hw_perf_event *hwc = &event->hw; + + hwc->state = 0; + perf_event_update_userpage(event); +} + +static void thunder_uncore_stop(struct perf_event *event, int flags) +{ + struct hw_perf_event *hwc = &event->hw; + + if ((flags & PERF_EF_UPDATE) && !(hwc->state & PERF_HES_UPTODATE)) { + thunder_uncore_read(event); + hwc->state |= PERF_HES_UPTODATE; + } +} + +static int thunder_uncore_add(struct perf_event *event, int flags) +{ + struct thunder_uncore *uncore = event_to_thunder_uncore(event); + struct hw_perf_event *hwc = &event->hw; + struct thunder_uncore_node *node; + int id, i; + + WARN_ON_ONCE(!uncore); + node = get_node(hwc->config, uncore); + id = get_id(hwc->config); + + /* are we already assigned? */ + if (hwc->idx != -1 && node->events[hwc->idx] == event) + goto out; + + for (i = 0; i < node->num_counters; i++) { + if (node->events[i] == event) { + hwc->idx = i; + goto out; + } + } + + /* these counters are self-sustained so idx must match the counter! */ + hwc->idx = -1; + if (cmpxchg(&node->events[id], NULL, event) == NULL) + hwc->idx = i; + +out: + if (hwc->idx == -1) + return -EBUSY; + + hwc->event_base = lmc_events[id]; + hwc->state = PERF_HES_UPTODATE; + + /* counters are read-only, so avoid PERF_EF_RELOAD */ + if (flags & PERF_EF_START) + thunder_uncore_start(event, 0); + + return 0; +} + +PMU_FORMAT_ATTR(event, "config:0-2"); + +static struct attribute *thunder_lmc_format_attr[] = { + &format_attr_event.attr, + &format_attr_node.attr, + NULL, +}; + +static struct attribute_group thunder_lmc_format_group = { + .name = "format", + .attrs = thunder_lmc_format_attr, +}; + +EVENT_ATTR(ifb_cnt, LMC_EVENT_IFB_CNT); +EVENT_ATTR(ops_cnt, LMC_EVENT_OPS_CNT); +EVENT_ATTR(dclk_cnt, LMC_EVENT_DCLK_CNT); +EVENT_ATTR(bank_conflict1, LMC_EVENT_BANK_CONFLICT1); +EVENT_ATTR(bank_conflict2, LMC_EVENT_BANK_CONFLICT2); + +static struct attribute *thunder_lmc_events_attr[] = { + EVENT_PTR(ifb_cnt), + EVENT_PTR(ops_cnt), + EVENT_PTR(dclk_cnt), + NULL, +}; + +static struct attribute *thunder_lmc_pass2_events_attr[] = { + EVENT_PTR(ifb_cnt), + EVENT_PTR(ops_cnt), + EVENT_PTR(dclk_cnt), + EVENT_PTR(bank_conflict1), + EVENT_PTR(bank_conflict2), + NULL, +}; + +static struct attribute_group thunder_lmc_events_group = { + .name = "events", + .attrs = NULL, +}; + +static const struct attribute_group *thunder_lmc_attr_groups[] = { + &thunder_uncore_attr_group, + &thunder_lmc_format_group, + &thunder_lmc_events_group, + NULL, +}; + +struct pmu thunder_lmc_pmu = { + .attr_groups = thunder_lmc_attr_groups, + .name = "thunder_lmc", + .event_init = thunder_uncore_event_init, + .add = thunder_uncore_add, + .del = thunder_uncore_del, + .start = thunder_uncore_start, + .stop = thunder_uncore_stop, + .read = thunder_uncore_read, +}; + +static int event_valid(u64 config) +{ + if (config <= LMC_EVENT_DCLK_CNT) + return 1; + + if (thunder_uncore_version == 1) + if (config == LMC_EVENT_BANK_CONFLICT1 || + config == LMC_EVENT_BANK_CONFLICT2) + return 1; + return 0; +} + +int __init thunder_uncore_lmc_setup(void) +{ + int ret = -ENOMEM; + + thunder_uncore_lmc = kzalloc(sizeof(struct thunder_uncore), GFP_KERNEL); + if (!thunder_uncore_lmc) + goto fail_nomem; + + /* pass2 is default */ + thunder_lmc_events_group.attrs = (thunder_uncore_version == 0) ? + thunder_lmc_events_attr : thunder_lmc_pass2_events_attr; + + ret = thunder_uncore_setup(thunder_uncore_lmc, + PCI_DEVICE_ID_THUNDER_LMC, + LMC_COUNTER_START, + LMC_COUNTER_END - LMC_COUNTER_START, + &thunder_lmc_pmu, + (thunder_uncore_version == 1) ? + LMC_PASS2_NR_COUNTERS : LMC_NR_COUNTERS); + if (ret) + goto fail; + + thunder_uncore_lmc->type = LMC_TYPE; + thunder_uncore_lmc->event_valid = event_valid; + return 0; + +fail: + kfree(thunder_uncore_lmc); +fail_nomem: + return ret; +} -- 1.9.1
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