From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752134AbcBLQ4Z (ORCPT ); Fri, 12 Feb 2016 11:56:25 -0500 Received: from mail-wm0-f65.google.com ([74.125.82.65]:34167 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752016AbcBLQzn (ORCPT ); Fri, 12 Feb 2016 11:55:43 -0500 From: Jan Glauber To: Will Deacon , Mark Rutland Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Jan Glauber Subject: [RFC PATCH 5/7] arm64/perf: Cavium ThunderX OCX LNE uncore support Date: Fri, 12 Feb 2016 17:55:10 +0100 Message-Id: <19008f588c058ef63ed42cc5b8b242d3e2565622.1455295032.git.jglauber@cavium.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Support counters for the CCPI Interface controller (OCX) lanes. Signed-off-by: Jan Glauber --- arch/arm64/kernel/uncore/Makefile | 3 +- arch/arm64/kernel/uncore/uncore_cavium.c | 3 + arch/arm64/kernel/uncore/uncore_cavium.h | 4 + arch/arm64/kernel/uncore/uncore_cavium_ocx_lne.c | 270 +++++++++++++++++++++++ 4 files changed, 279 insertions(+), 1 deletion(-) create mode 100644 arch/arm64/kernel/uncore/uncore_cavium_ocx_lne.c diff --git a/arch/arm64/kernel/uncore/Makefile b/arch/arm64/kernel/uncore/Makefile index 81479e8..da39f452 100644 --- a/arch/arm64/kernel/uncore/Makefile +++ b/arch/arm64/kernel/uncore/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_ARCH_THUNDER) += uncore_cavium.o \ uncore_cavium_l2c_tad.o \ uncore_cavium_l2c_cbc.o \ - uncore_cavium_lmc.o + uncore_cavium_lmc.o \ + uncore_cavium_ocx_lne.o diff --git a/arch/arm64/kernel/uncore/uncore_cavium.c b/arch/arm64/kernel/uncore/uncore_cavium.c index a972418..f2fbdea 100644 --- a/arch/arm64/kernel/uncore/uncore_cavium.c +++ b/arch/arm64/kernel/uncore/uncore_cavium.c @@ -28,6 +28,8 @@ struct thunder_uncore *event_to_thunder_uncore(struct perf_event *event) return thunder_uncore_l2c_cbc; else if (event->pmu->type == thunder_lmc_pmu.type) return thunder_uncore_lmc; + else if (event->pmu->type == thunder_ocx_lne_pmu.type) + return thunder_uncore_ocx_lne; else return NULL; } @@ -215,6 +217,7 @@ static int __init thunder_uncore_init(void) thunder_uncore_l2c_tad_setup(); thunder_uncore_l2c_cbc_setup(); thunder_uncore_lmc_setup(); + thunder_uncore_ocx_lne_setup(); return 0; } late_initcall(thunder_uncore_init); diff --git a/arch/arm64/kernel/uncore/uncore_cavium.h b/arch/arm64/kernel/uncore/uncore_cavium.h index 6e3beba..b9bcb42 100644 --- a/arch/arm64/kernel/uncore/uncore_cavium.h +++ b/arch/arm64/kernel/uncore/uncore_cavium.h @@ -16,6 +16,7 @@ enum uncore_type { L2C_TAD_TYPE, L2C_CBC_TYPE, LMC_TYPE, + OCX_LNE_TYPE, }; extern int thunder_uncore_version; @@ -64,9 +65,11 @@ extern struct attribute_group thunder_uncore_attr_group; 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 thunder_uncore *thunder_uncore_ocx_lne; extern struct pmu thunder_l2c_tad_pmu; extern struct pmu thunder_l2c_cbc_pmu; extern struct pmu thunder_lmc_pmu; +extern struct pmu thunder_ocx_lne_pmu; /* Prototypes */ struct thunder_uncore *event_to_thunder_uncore(struct perf_event *event); @@ -83,3 +86,4 @@ 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); +int thunder_uncore_ocx_lne_setup(void); diff --git a/arch/arm64/kernel/uncore/uncore_cavium_ocx_lne.c b/arch/arm64/kernel/uncore/uncore_cavium_ocx_lne.c new file mode 100644 index 0000000..c2981b9 --- /dev/null +++ b/arch/arm64/kernel/uncore/uncore_cavium_ocx_lne.c @@ -0,0 +1,270 @@ +/* + * Cavium Thunder uncore PMU support, OCX LNE counters. + * + * Copyright 2016 Cavium Inc. + * Author: Jan Glauber + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "uncore_cavium.h" + +#ifndef PCI_DEVICE_ID_THUNDER_OCX +#define PCI_DEVICE_ID_THUNDER_OCX 0xa013 +#endif + +#define OCX_LNE_NR_COUNTERS 15 +#define OCX_LNE_NR_UNITS 24 +#define OCX_LNE_UNIT_OFFSET 0x100 +#define OCX_LNE_CONTROL_OFFSET 0x8000 +#define OCX_LNE_COUNTER_OFFSET 0x40 + +#define OCX_LNE_STAT_DISABLE 0 +#define OCX_LNE_STAT_ENABLE 1 + +/* OCX LNE event list */ +#define OCX_LNE_EVENT_STAT00 0x00 +#define OCX_LNE_EVENT_STAT01 0x01 +#define OCX_LNE_EVENT_STAT02 0x02 +#define OCX_LNE_EVENT_STAT03 0x03 +#define OCX_LNE_EVENT_STAT04 0x04 +#define OCX_LNE_EVENT_STAT05 0x05 +#define OCX_LNE_EVENT_STAT06 0x06 +#define OCX_LNE_EVENT_STAT07 0x07 +#define OCX_LNE_EVENT_STAT08 0x08 +#define OCX_LNE_EVENT_STAT09 0x09 +#define OCX_LNE_EVENT_STAT10 0x0a +#define OCX_LNE_EVENT_STAT11 0x0b +#define OCX_LNE_EVENT_STAT12 0x0c +#define OCX_LNE_EVENT_STAT13 0x0d +#define OCX_LNE_EVENT_STAT14 0x0e + +struct thunder_uncore *thunder_uncore_ocx_lne; + +static inline void __iomem *map_offset_ocx_lne(unsigned long addr, + struct thunder_uncore *uncore, int unit) +{ + return (void __iomem *) (addr + + uncore->pdevs[0].map + + unit * OCX_LNE_UNIT_OFFSET); +} + +/* + * Summarize counters across all LNE's. Different from the other uncore + * PMUs because all LNE's are on one PCI device. + */ +static void thunder_uncore_read_ocx_lne(struct perf_event *event) +{ + struct thunder_uncore *uncore = event_to_thunder_uncore(event); + struct hw_perf_event *hwc = &event->hw; + u64 prev, new = 0; + s64 delta; + int i; + + /* + * since we do not enable counter overflow interrupts, + * we do not have to worry about prev_count changing on us + */ + + prev = local64_read(&hwc->prev_count); + + /* read counter values from all units */ + for (i = 0; i < OCX_LNE_NR_UNITS; i++) + new += readq(map_offset_ocx_lne(hwc->event_base, uncore, i)); + + local64_set(&hwc->prev_count, new); + delta = new - prev; + local64_add(delta, &event->count); +} + +static void thunder_uncore_start(struct perf_event *event, int flags) +{ + struct thunder_uncore *uncore = event_to_thunder_uncore(event); + struct hw_perf_event *hwc = &event->hw; + int i; + + hwc->state = 0; + + /* enable counters on all units */ + for (i = 0; i < OCX_LNE_NR_UNITS; i++) + writeb(OCX_LNE_STAT_ENABLE, + map_offset_ocx_lne(hwc->config_base, uncore, i)); + + perf_event_update_userpage(event); +} + +static void thunder_uncore_stop(struct perf_event *event, int flags) +{ + struct thunder_uncore *uncore = event_to_thunder_uncore(event); + struct hw_perf_event *hwc = &event->hw; + int i; + + /* disable counters on all units */ + for (i = 0; i < OCX_LNE_NR_UNITS; i++) + writeb(OCX_LNE_STAT_DISABLE, + map_offset_ocx_lne(hwc->config_base, uncore, i)); + hwc->state |= PERF_HES_STOPPED; + + if ((flags & PERF_EF_UPDATE) && !(hwc->state & PERF_HES_UPTODATE)) { + thunder_uncore_read_ocx_lne(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; + int i; + + WARN_ON_ONCE(!uncore); + + /* are we already assigned? */ + if (hwc->idx != -1 && uncore->events[hwc->idx] == event) + goto out; + + for (i = 0; i < uncore->num_counters; i++) { + if (uncore->events[i] == event) { + hwc->idx = i; + goto out; + } + } + + /* counters are 1:1 */ + hwc->idx = -1; + if (cmpxchg(&uncore->events[hwc->config], NULL, event) == NULL) + hwc->idx = hwc->config; + +out: + if (hwc->idx == -1) + return -EBUSY; + + hwc->config_base = 0; + hwc->event_base = OCX_LNE_COUNTER_OFFSET + + hwc->idx * sizeof(unsigned long long); + hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED; + + if (flags & PERF_EF_START) + /* counters are read-only, so avoid PERF_EF_RELOAD */ + thunder_uncore_start(event, 0); + + return 0; +} + +PMU_FORMAT_ATTR(event, "config:0-3"); + +static struct attribute *thunder_ocx_lne_format_attr[] = { + &format_attr_event.attr, + NULL, +}; + +static struct attribute_group thunder_ocx_lne_format_group = { + .name = "format", + .attrs = thunder_ocx_lne_format_attr, +}; + +EVENT_ATTR(stat00, OCX_LNE_EVENT_STAT00); +EVENT_ATTR(stat01, OCX_LNE_EVENT_STAT01); +EVENT_ATTR(stat02, OCX_LNE_EVENT_STAT02); +EVENT_ATTR(stat03, OCX_LNE_EVENT_STAT03); +EVENT_ATTR(stat04, OCX_LNE_EVENT_STAT04); +EVENT_ATTR(stat05, OCX_LNE_EVENT_STAT05); +EVENT_ATTR(stat06, OCX_LNE_EVENT_STAT06); +EVENT_ATTR(stat07, OCX_LNE_EVENT_STAT07); +EVENT_ATTR(stat08, OCX_LNE_EVENT_STAT08); +EVENT_ATTR(stat09, OCX_LNE_EVENT_STAT09); +EVENT_ATTR(stat10, OCX_LNE_EVENT_STAT10); +EVENT_ATTR(stat11, OCX_LNE_EVENT_STAT11); +EVENT_ATTR(stat12, OCX_LNE_EVENT_STAT12); +EVENT_ATTR(stat13, OCX_LNE_EVENT_STAT13); +EVENT_ATTR(stat14, OCX_LNE_EVENT_STAT14); + +static struct attribute *thunder_ocx_lne_events_attr[] = { + EVENT_PTR(stat00), + EVENT_PTR(stat01), + EVENT_PTR(stat02), + EVENT_PTR(stat03), + EVENT_PTR(stat04), + EVENT_PTR(stat05), + EVENT_PTR(stat06), + EVENT_PTR(stat07), + EVENT_PTR(stat08), + EVENT_PTR(stat09), + EVENT_PTR(stat10), + EVENT_PTR(stat11), + EVENT_PTR(stat12), + EVENT_PTR(stat13), + EVENT_PTR(stat14), + NULL, +}; + +static struct attribute_group thunder_ocx_lne_events_group = { + .name = "events", + .attrs = thunder_ocx_lne_events_attr, +}; + +static const struct attribute_group *thunder_ocx_lne_attr_groups[] = { + &thunder_uncore_attr_group, + &thunder_ocx_lne_format_group, + &thunder_ocx_lne_events_group, + NULL, +}; + +struct pmu thunder_ocx_lne_pmu = { + .attr_groups = thunder_ocx_lne_attr_groups, + .name = "thunder_ocx_lne", + .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_ocx_lne, +}; + +static int event_valid(u64 config) +{ + if (config <= OCX_LNE_EVENT_STAT14) + return 1; + else + return 0; +} + +int __init thunder_uncore_ocx_lne_setup(void) +{ + int ret; + + thunder_uncore_ocx_lne = kzalloc(sizeof(struct thunder_uncore), + GFP_KERNEL); + if (!thunder_uncore_ocx_lne) { + ret = -ENOMEM; + goto fail_nomem; + } + + ret = thunder_uncore_setup(thunder_uncore_ocx_lne, + PCI_DEVICE_ID_THUNDER_OCX, + OCX_LNE_CONTROL_OFFSET, + OCX_LNE_COUNTER_OFFSET + OCX_LNE_NR_COUNTERS + * sizeof(unsigned long long), + &thunder_ocx_lne_pmu); + if (ret) + goto fail; + + thunder_uncore_ocx_lne->type = OCX_LNE_TYPE; + thunder_uncore_ocx_lne->num_counters = OCX_LNE_NR_COUNTERS; + thunder_uncore_ocx_lne->event_valid = event_valid; + return 0; + +fail: + kfree(thunder_uncore_ocx_lne); +fail_nomem: + return ret; +} -- 1.9.1