diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-07 21:23:40 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-07 21:23:40 -0700 |
commit | 6afd563d4bbc1924b7de9e053324c007e0d36476 (patch) | |
tree | 619c2270f6f09ce8c9eb7f6aa448f07f67ffa8e8 /drivers/perf | |
parent | b4f33f6ddd0c218e12454e1379de3aaa73f2e8dc (diff) | |
parent | d6db68b2deaa0158d25b236edffcf6dd2117208f (diff) |
Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Arnd Bergmann:
"Driver updates for ARM SoCs, including a couple of newly added
drivers:
- The Qualcomm external bus interface 2 (EBI2), used in some of their
mobile phone chips for connecting flash memory, LCD displays or
other peripherals
- Secure monitor firmware for Amlogic SoCs, and an NVMEM driver for
the EFUSE based on that firmware interface.
- Perf support for the AppliedMicro X-Gene performance monitor unit
- Reset driver for STMicroelectronics STM32
- Reset driver for SocioNext UniPhier SoCs
Aside from these, there are minor updates to SoC-specific bus,
clocksource, firmware, pinctrl, reset, rtc and pmic drivers"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (50 commits)
bus: qcom-ebi2: depend on HAS_IOMEM
pinctrl: mvebu: orion5x: Generalise mv88f5181l support for 88f5181
clk: mvebu: Add clk support for the orion5x SoC mv88f5181
dt-bindings: EXYNOS: Add Exynos5433 PMU compatible
clocksource: exynos_mct: Add the support for ARM64
perf: xgene: Add APM X-Gene SoC Performance Monitoring Unit driver
Documentation: Add documentation for APM X-Gene SoC PMU DTS binding
MAINTAINERS: Add entry for APM X-Gene SoC PMU driver
bus: qcom: add EBI2 driver
bus: qcom: add EBI2 device tree bindings
rtc: rtc-pm8xxx: Add support for pm8018 rtc
nvmem: amlogic: Add Amlogic Meson EFUSE driver
firmware: Amlogic: Add secure monitor driver
soc: qcom: smd: Reset rx tail rather than tx
memory: atmel-sdramc: fix a possible NULL dereference
reset: hi6220: allow to compile test driver on other architectures
reset: zynq: add driver Kconfig option
reset: sunxi: add driver Kconfig option
reset: stm32: add driver Kconfig option
reset: socfpga: add driver Kconfig option
...
Diffstat (limited to 'drivers/perf')
-rw-r--r-- | drivers/perf/Kconfig | 7 | ||||
-rw-r--r-- | drivers/perf/Makefile | 1 | ||||
-rw-r--r-- | drivers/perf/xgene_pmu.c | 1398 |
3 files changed, 1406 insertions, 0 deletions
diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig index 04e2653bb8c0..4d5c5f9f0dbd 100644 --- a/drivers/perf/Kconfig +++ b/drivers/perf/Kconfig @@ -12,4 +12,11 @@ config ARM_PMU Say y if you want to use CPU performance monitors on ARM-based systems. +config XGENE_PMU + depends on PERF_EVENTS && ARCH_XGENE + bool "APM X-Gene SoC PMU" + default n + help + Say y if you want to use APM X-Gene SoC performance monitors. + endmenu diff --git a/drivers/perf/Makefile b/drivers/perf/Makefile index acd2397ded94..b116e982810b 100644 --- a/drivers/perf/Makefile +++ b/drivers/perf/Makefile @@ -1 +1,2 @@ obj-$(CONFIG_ARM_PMU) += arm_pmu.o +obj-$(CONFIG_XGENE_PMU) += xgene_pmu.o diff --git a/drivers/perf/xgene_pmu.c b/drivers/perf/xgene_pmu.c new file mode 100644 index 000000000000..c2ac7646b99f --- /dev/null +++ b/drivers/perf/xgene_pmu.c @@ -0,0 +1,1398 @@ +/* + * APM X-Gene SoC PMU (Performance Monitor Unit) + * + * Copyright (c) 2016, Applied Micro Circuits Corporation + * Author: Hoan Tran <hotran@apm.com> + * Tai Nguyen <ttnguyen@apm.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/acpi.h> +#include <linux/clk.h> +#include <linux/cpumask.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mfd/syscon.h> +#include <linux/of_address.h> +#include <linux/of_fdt.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> +#include <linux/perf_event.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#define CSW_CSWCR 0x0000 +#define CSW_CSWCR_DUALMCB_MASK BIT(0) +#define MCBADDRMR 0x0000 +#define MCBADDRMR_DUALMCU_MODE_MASK BIT(2) + +#define PCPPMU_INTSTATUS_REG 0x000 +#define PCPPMU_INTMASK_REG 0x004 +#define PCPPMU_INTMASK 0x0000000F +#define PCPPMU_INTENMASK 0xFFFFFFFF +#define PCPPMU_INTCLRMASK 0xFFFFFFF0 +#define PCPPMU_INT_MCU BIT(0) +#define PCPPMU_INT_MCB BIT(1) +#define PCPPMU_INT_L3C BIT(2) +#define PCPPMU_INT_IOB BIT(3) + +#define PMU_MAX_COUNTERS 4 +#define PMU_CNT_MAX_PERIOD 0x100000000ULL +#define PMU_OVERFLOW_MASK 0xF +#define PMU_PMCR_E BIT(0) +#define PMU_PMCR_P BIT(1) + +#define PMU_PMEVCNTR0 0x000 +#define PMU_PMEVCNTR1 0x004 +#define PMU_PMEVCNTR2 0x008 +#define PMU_PMEVCNTR3 0x00C +#define PMU_PMEVTYPER0 0x400 +#define PMU_PMEVTYPER1 0x404 +#define PMU_PMEVTYPER2 0x408 +#define PMU_PMEVTYPER3 0x40C +#define PMU_PMAMR0 0xA00 +#define PMU_PMAMR1 0xA04 +#define PMU_PMCNTENSET 0xC00 +#define PMU_PMCNTENCLR 0xC20 +#define PMU_PMINTENSET 0xC40 +#define PMU_PMINTENCLR 0xC60 +#define PMU_PMOVSR 0xC80 +#define PMU_PMCR 0xE04 + +#define to_pmu_dev(p) container_of(p, struct xgene_pmu_dev, pmu) +#define GET_CNTR(ev) (ev->hw.idx) +#define GET_EVENTID(ev) (ev->hw.config & 0xFFULL) +#define GET_AGENTID(ev) (ev->hw.config_base & 0xFFFFFFFFUL) +#define GET_AGENT1ID(ev) ((ev->hw.config_base >> 32) & 0xFFFFFFFFUL) + +struct hw_pmu_info { + u32 type; + u32 enable_mask; + void __iomem *csr; +}; + +struct xgene_pmu_dev { + struct hw_pmu_info *inf; + struct xgene_pmu *parent; + struct pmu pmu; + u8 max_counters; + DECLARE_BITMAP(cntr_assign_mask, PMU_MAX_COUNTERS); + u64 max_period; + const struct attribute_group **attr_groups; + struct perf_event *pmu_counter_event[PMU_MAX_COUNTERS]; +}; + +struct xgene_pmu { + struct device *dev; + int version; + void __iomem *pcppmu_csr; + u32 mcb_active_mask; + u32 mc_active_mask; + cpumask_t cpu; + raw_spinlock_t lock; + struct list_head l3cpmus; + struct list_head iobpmus; + struct list_head mcbpmus; + struct list_head mcpmus; +}; + +struct xgene_pmu_dev_ctx { + char *name; + struct list_head next; + struct xgene_pmu_dev *pmu_dev; + struct hw_pmu_info inf; +}; + +struct xgene_pmu_data { + int id; + u32 data; +}; + +enum xgene_pmu_version { + PCP_PMU_V1 = 1, + PCP_PMU_V2, +}; + +enum xgene_pmu_dev_type { + PMU_TYPE_L3C = 0, + PMU_TYPE_IOB, + PMU_TYPE_MCB, + PMU_TYPE_MC, +}; + +/* + * sysfs format attributes + */ +static ssize_t xgene_pmu_format_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct dev_ext_attribute *eattr; + + eattr = container_of(attr, struct dev_ext_attribute, attr); + return sprintf(buf, "%s\n", (char *) eattr->var); +} + +#define XGENE_PMU_FORMAT_ATTR(_name, _config) \ + (&((struct dev_ext_attribute[]) { \ + { .attr = __ATTR(_name, S_IRUGO, xgene_pmu_format_show, NULL), \ + .var = (void *) _config, } \ + })[0].attr.attr) + +static struct attribute *l3c_pmu_format_attrs[] = { + XGENE_PMU_FORMAT_ATTR(l3c_eventid, "config:0-7"), + XGENE_PMU_FORMAT_ATTR(l3c_agentid, "config1:0-9"), + NULL, +}; + +static struct attribute *iob_pmu_format_attrs[] = { + XGENE_PMU_FORMAT_ATTR(iob_eventid, "config:0-7"), + XGENE_PMU_FORMAT_ATTR(iob_agentid, "config1:0-63"), + NULL, +}; + +static struct attribute *mcb_pmu_format_attrs[] = { + XGENE_PMU_FORMAT_ATTR(mcb_eventid, "config:0-5"), + XGENE_PMU_FORMAT_ATTR(mcb_agentid, "config1:0-9"), + NULL, +}; + +static struct attribute *mc_pmu_format_attrs[] = { + XGENE_PMU_FORMAT_ATTR(mc_eventid, "config:0-28"), + NULL, +}; + +static const struct attribute_group l3c_pmu_format_attr_group = { + .name = "format", + .attrs = l3c_pmu_format_attrs, +}; + +static const struct attribute_group iob_pmu_format_attr_group = { + .name = "format", + .attrs = iob_pmu_format_attrs, +}; + +static const struct attribute_group mcb_pmu_format_attr_group = { + .name = "format", + .attrs = mcb_pmu_format_attrs, +}; + +static const struct attribute_group mc_pmu_format_attr_group = { + .name = "format", + .attrs = mc_pmu_format_attrs, +}; + +/* + * sysfs event attributes + */ +static ssize_t xgene_pmu_event_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct dev_ext_attribute *eattr; + + eattr = container_of(attr, struct dev_ext_attribute, attr); + return sprintf(buf, "config=0x%lx\n", (unsigned long) eattr->var); +} + +#define XGENE_PMU_EVENT_ATTR(_name, _config) \ + (&((struct dev_ext_attribute[]) { \ + { .attr = __ATTR(_name, S_IRUGO, xgene_pmu_event_show, NULL), \ + .var = (void *) _config, } \ + })[0].attr.attr) + +static struct attribute *l3c_pmu_events_attrs[] = { + XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), + XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01), + XGENE_PMU_EVENT_ATTR(read-hit, 0x02), + XGENE_PMU_EVENT_ATTR(read-miss, 0x03), + XGENE_PMU_EVENT_ATTR(write-need-replacement, 0x06), + XGENE_PMU_EVENT_ATTR(write-not-need-replacement, 0x07), + XGENE_PMU_EVENT_ATTR(tq-full, 0x08), + XGENE_PMU_EVENT_ATTR(ackq-full, 0x09), + XGENE_PMU_EVENT_ATTR(wdb-full, 0x0a), + XGENE_PMU_EVENT_ATTR(bank-fifo-full, 0x0b), + XGENE_PMU_EVENT_ATTR(odb-full, 0x0c), + XGENE_PMU_EVENT_ATTR(wbq-full, 0x0d), + XGENE_PMU_EVENT_ATTR(bank-conflict-fifo-issue, 0x0e), + XGENE_PMU_EVENT_ATTR(bank-fifo-issue, 0x0f), + NULL, +}; + +static struct attribute *iob_pmu_events_attrs[] = { + XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), + XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01), + XGENE_PMU_EVENT_ATTR(axi0-read, 0x02), + XGENE_PMU_EVENT_ATTR(axi0-read-partial, 0x03), + XGENE_PMU_EVENT_ATTR(axi1-read, 0x04), + XGENE_PMU_EVENT_ATTR(axi1-read-partial, 0x05), + XGENE_PMU_EVENT_ATTR(csw-read-block, 0x06), + XGENE_PMU_EVENT_ATTR(csw-read-partial, 0x07), + XGENE_PMU_EVENT_ATTR(axi0-write, 0x10), + XGENE_PMU_EVENT_ATTR(axi0-write-partial, 0x11), + XGENE_PMU_EVENT_ATTR(axi1-write, 0x13), + XGENE_PMU_EVENT_ATTR(axi1-write-partial, 0x14), + XGENE_PMU_EVENT_ATTR(csw-inbound-dirty, 0x16), + NULL, +}; + +static struct attribute *mcb_pmu_events_attrs[] = { + XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), + XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01), + XGENE_PMU_EVENT_ATTR(csw-read, 0x02), + XGENE_PMU_EVENT_ATTR(csw-write-request, 0x03), + XGENE_PMU_EVENT_ATTR(mcb-csw-stall, 0x04), + XGENE_PMU_EVENT_ATTR(cancel-read-gack, 0x05), + NULL, +}; + +static struct attribute *mc_pmu_events_attrs[] = { + XGENE_PMU_EVENT_ATTR(cycle-count, 0x00), + XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01), + XGENE_PMU_EVENT_ATTR(act-cmd-sent, 0x02), + XGENE_PMU_EVENT_ATTR(pre-cmd-sent, 0x03), + XGENE_PMU_EVENT_ATTR(rd-cmd-sent, 0x04), + XGENE_PMU_EVENT_ATTR(rda-cmd-sent, 0x05), + XGENE_PMU_EVENT_ATTR(wr-cmd-sent, 0x06), + XGENE_PMU_EVENT_ATTR(wra-cmd-sent, 0x07), + XGENE_PMU_EVENT_ATTR(pde-cmd-sent, 0x08), + XGENE_PMU_EVENT_ATTR(sre-cmd-sent, 0x09), + XGENE_PMU_EVENT_ATTR(prea-cmd-sent, 0x0a), + XGENE_PMU_EVENT_ATTR(ref-cmd-sent, 0x0b), + XGENE_PMU_EVENT_ATTR(rd-rda-cmd-sent, 0x0c), + XGENE_PMU_EVENT_ATTR(wr-wra-cmd-sent, 0x0d), + XGENE_PMU_EVENT_ATTR(in-rd-collision, 0x0e), + XGENE_PMU_EVENT_ATTR(in-wr-collision, 0x0f), + XGENE_PMU_EVENT_ATTR(collision-queue-not-empty, 0x10), + XGENE_PMU_EVENT_ATTR(collision-queue-full, 0x11), + XGENE_PMU_EVENT_ATTR(mcu-request, 0x12), + XGENE_PMU_EVENT_ATTR(mcu-rd-request, 0x13), + XGENE_PMU_EVENT_ATTR(mcu-hp-rd-request, 0x14), + XGENE_PMU_EVENT_ATTR(mcu-wr-request, 0x15), + XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-all, 0x16), + XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-cancel, 0x17), + XGENE_PMU_EVENT_ATTR(mcu-rd-response, 0x18), + XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-all, 0x19), + XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-cancel, 0x1a), + XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-all, 0x1b), + XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-cancel, 0x1c), + NULL, +}; + +static const struct attribute_group l3c_pmu_events_attr_group = { + .name = "events", + .attrs = l3c_pmu_events_attrs, +}; + +static const struct attribute_group iob_pmu_events_attr_group = { + .name = "events", + .attrs = iob_pmu_events_attrs, +}; + +static const struct attribute_group mcb_pmu_events_attr_group = { + .name = "events", + .attrs = mcb_pmu_events_attrs, +}; + +static const struct attribute_group mc_pmu_events_attr_group = { + .name = "events", + .attrs = mc_pmu_events_attrs, +}; + +/* + * sysfs cpumask attributes + */ +static ssize_t xgene_pmu_cpumask_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(dev_get_drvdata(dev)); + + return cpumap_print_to_pagebuf(true, buf, &pmu_dev->parent->cpu); +} + +static DEVICE_ATTR(cpumask, S_IRUGO, xgene_pmu_cpumask_show, NULL); + +static struct attribute *xgene_pmu_cpumask_attrs[] = { + &dev_attr_cpumask.attr, + NULL, +}; + +static const struct attribute_group pmu_cpumask_attr_group = { + .attrs = xgene_pmu_cpumask_attrs, +}; + +/* + * Per PMU device attribute groups + */ +static const struct attribute_group *l3c_pmu_attr_groups[] = { + &l3c_pmu_format_attr_group, + &pmu_cpumask_attr_group, + &l3c_pmu_events_attr_group, + NULL +}; + +static const struct attribute_group *iob_pmu_attr_groups[] = { + &iob_pmu_format_attr_group, + &pmu_cpumask_attr_group, + &iob_pmu_events_attr_group, + NULL +}; + +static const struct attribute_group *mcb_pmu_attr_groups[] = { + &mcb_pmu_format_attr_group, + &pmu_cpumask_attr_group, + &mcb_pmu_events_attr_group, + NULL +}; + +static const struct attribute_group *mc_pmu_attr_groups[] = { + &mc_pmu_format_attr_group, + &pmu_cpumask_attr_group, + &mc_pmu_events_attr_group, + NULL +}; + +static int get_next_avail_cntr(struct xgene_pmu_dev *pmu_dev) +{ + int cntr; + + cntr = find_first_zero_bit(pmu_dev->cntr_assign_mask, + pmu_dev->max_counters); + if (cntr == pmu_dev->max_counters) + return -ENOSPC; + set_bit(cntr, pmu_dev->cntr_assign_mask); + + return cntr; +} + +static void clear_avail_cntr(struct xgene_pmu_dev *pmu_dev, int cntr) +{ + clear_bit(cntr, pmu_dev->cntr_assign_mask); +} + +static inline void xgene_pmu_mask_int(struct xgene_pmu *xgene_pmu) +{ + writel(PCPPMU_INTENMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG); +} + +static inline void xgene_pmu_unmask_int(struct xgene_pmu *xgene_pmu) +{ + writel(PCPPMU_INTCLRMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG); +} + +static inline u32 xgene_pmu_read_counter(struct xgene_pmu_dev *pmu_dev, int idx) +{ + return readl(pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx)); +} + +static inline void +xgene_pmu_write_counter(struct xgene_pmu_dev *pmu_dev, int idx, u32 val) +{ + writel(val, pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx)); +} + +static inline void +xgene_pmu_write_evttype(struct xgene_pmu_dev *pmu_dev, int idx, u32 val) +{ + writel(val, pmu_dev->inf->csr + PMU_PMEVTYPER0 + (4 * idx)); +} + +static inline void +xgene_pmu_write_agentmsk(struct xgene_pmu_dev *pmu_dev, u32 val) +{ + writel(val, pmu_dev->inf->csr + PMU_PMAMR0); +} + +static inline void +xgene_pmu_write_agent1msk(struct xgene_pmu_dev *pmu_dev, u32 val) +{ + writel(val, pmu_dev->inf->csr + PMU_PMAMR1); +} + +static inline void +xgene_pmu_enable_counter(struct xgene_pmu_dev *pmu_dev, int idx) +{ + u32 val; + + val = readl(pmu_dev->inf->csr + PMU_PMCNTENSET); + val |= 1 << idx; + writel(val, pmu_dev->inf->csr + PMU_PMCNTENSET); +} + +static inline void +xgene_pmu_disable_counter(struct xgene_pmu_dev *pmu_dev, int idx) +{ + u32 val; + + val = readl(pmu_dev->inf->csr + PMU_PMCNTENCLR); + val |= 1 << idx; + writel(val, pmu_dev->inf->csr + PMU_PMCNTENCLR); +} + +static inline void +xgene_pmu_enable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx) +{ + u32 val; + + val = readl(pmu_dev->inf->csr + PMU_PMINTENSET); + val |= 1 << idx; + writel(val, pmu_dev->inf->csr + PMU_PMINTENSET); +} + +static inline void +xgene_pmu_disable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx) +{ + u32 val; + + val = readl(pmu_dev->inf->csr + PMU_PMINTENCLR); + val |= 1 << idx; + writel(val, pmu_dev->inf->csr + PMU_PMINTENCLR); +} + +static inline void xgene_pmu_reset_counters(struct xgene_pmu_dev *pmu_dev) +{ + u32 val; + + val = readl(pmu_dev->inf->csr + PMU_PMCR); + val |= PMU_PMCR_P; + writel(val, pmu_dev->inf->csr + PMU_PMCR); +} + +static inline void xgene_pmu_start_counters(struct xgene_pmu_dev *pmu_dev) +{ + u32 val; + + val = readl(pmu_dev->inf->csr + PMU_PMCR); + val |= PMU_PMCR_E; + writel(val, pmu_dev->inf->csr + PMU_PMCR); +} + +static inline void xgene_pmu_stop_counters(struct xgene_pmu_dev *pmu_dev) +{ + u32 val; + + val = readl(pmu_dev->inf->csr + PMU_PMCR); + val &= ~PMU_PMCR_E; + writel(val, pmu_dev->inf->csr + PMU_PMCR); +} + +static void xgene_perf_pmu_enable(struct pmu *pmu) +{ + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu); + int enabled = bitmap_weight(pmu_dev->cntr_assign_mask, + pmu_dev->max_counters); + + if (!enabled) + return; + + xgene_pmu_start_counters(pmu_dev); +} + +static void xgene_perf_pmu_disable(struct pmu *pmu) +{ + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu); + + xgene_pmu_stop_counters(pmu_dev); +} + +static int xgene_perf_event_init(struct perf_event *event) +{ + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); + struct hw_perf_event *hw = &event->hw; + struct perf_event *sibling; + + /* Test the event attr type check for PMU enumeration */ + if (event->attr.type != event->pmu->type) + return -ENOENT; + + /* + * SOC PMU counters are shared across all cores. + * Therefore, it does not support per-process mode. + * Also, it does not support event sampling mode. + */ + if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK) + return -EINVAL; + + /* SOC counters do not have usr/os/guest/host bits */ + if (event->attr.exclude_user || event->attr.exclude_kernel || + event->attr.exclude_host || event->attr.exclude_guest) + return -EINVAL; + + if (event->cpu < 0) + return -EINVAL; + /* + * Many perf core operations (eg. events rotation) operate on a + * single CPU context. This is obvious for CPU PMUs, where one + * expects the same sets of events being observed on all CPUs, + * but can lead to issues for off-core PMUs, where each + * event could be theoretically assigned to a different CPU. To + * mitigate this, we enforce CPU assignment to one, selected + * processor (the one described in the "cpumask" attribute). + */ + event->cpu = cpumask_first(&pmu_dev->parent->cpu); + + hw->config = event->attr.config; + /* + * Each bit of the config1 field represents an agent from which the + * request of the event come. The event is counted only if it's caused + * by a request of an agent has the bit cleared. + * By default, the event is counted for all agents. + */ + hw->config_base = event->attr.config1; + + /* + * We must NOT create groups containing mixed PMUs, although software + * events are acceptable + */ + if (event->group_leader->pmu != event->pmu && + !is_software_event(event->group_leader)) + return -EINVAL; + + list_for_each_entry(sibling, &event->group_leader->sibling_list, + group_entry) + if (sibling->pmu != event->pmu && + !is_software_event(sibling)) + return -EINVAL; + + return 0; +} + +static void xgene_perf_enable_event(struct perf_event *event) +{ + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); + + xgene_pmu_write_evttype(pmu_dev, GET_CNTR(event), GET_EVENTID(event)); + xgene_pmu_write_agentmsk(pmu_dev, ~((u32)GET_AGENTID(event))); + if (pmu_dev->inf->type == PMU_TYPE_IOB) + xgene_pmu_write_agent1msk(pmu_dev, ~((u32)GET_AGENT1ID(event))); + + xgene_pmu_enable_counter(pmu_dev, GET_CNTR(event)); + xgene_pmu_enable_counter_int(pmu_dev, GET_CNTR(event)); +} + +static void xgene_perf_disable_event(struct perf_event *event) +{ + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); + + xgene_pmu_disable_counter(pmu_dev, GET_CNTR(event)); + xgene_pmu_disable_counter_int(pmu_dev, GET_CNTR(event)); +} + +static void xgene_perf_event_set_period(struct perf_event *event) +{ + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); + struct hw_perf_event *hw = &event->hw; + /* + * The X-Gene PMU counters have a period of 2^32. To account for the + * possiblity of extreme interrupt latency we program for a period of + * half that. Hopefully we can handle the interrupt before another 2^31 + * events occur and the counter overtakes its previous value. + */ + u64 val = 1ULL << 31; + + local64_set(&hw->prev_count, val); + xgene_pmu_write_counter(pmu_dev, hw->idx, (u32) val); +} + +static void xgene_perf_event_update(struct perf_event *event) +{ + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); + struct hw_perf_event *hw = &event->hw; + u64 delta, prev_raw_count, new_raw_count; + +again: + prev_raw_count = local64_read(&hw->prev_count); + new_raw_count = xgene_pmu_read_counter(pmu_dev, GET_CNTR(event)); + + if (local64_cmpxchg(&hw->prev_count, prev_raw_count, + new_raw_count) != prev_raw_count) + goto again; + + delta = (new_raw_count - prev_raw_count) & pmu_dev->max_period; + + local64_add(delta, &event->count); +} + +static void xgene_perf_read(struct perf_event *event) +{ + xgene_perf_event_update(event); +} + +static void xgene_perf_start(struct perf_event *event, int flags) +{ + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); + struct hw_perf_event *hw = &event->hw; + + if (WARN_ON_ONCE(!(hw->state & PERF_HES_STOPPED))) + return; + + WARN_ON_ONCE(!(hw->state & PERF_HES_UPTODATE)); + hw->state = 0; + + xgene_perf_event_set_period(event); + + if (flags & PERF_EF_RELOAD) { + u64 prev_raw_count = local64_read(&hw->prev_count); + + xgene_pmu_write_counter(pmu_dev, GET_CNTR(event), + (u32) prev_raw_count); + } + + xgene_perf_enable_event(event); + perf_event_update_userpage(event); +} + +static void xgene_perf_stop(struct perf_event *event, int flags) +{ + struct hw_perf_event *hw = &event->hw; + u64 config; + + if (hw->state & PERF_HES_UPTODATE) + return; + + xgene_perf_disable_event(event); + WARN_ON_ONCE(hw->state & PERF_HES_STOPPED); + hw->state |= PERF_HES_STOPPED; + + if (hw->state & PERF_HES_UPTODATE) + return; + + config = hw->config; + xgene_perf_read(event); + hw->state |= PERF_HES_UPTODATE; +} + +static int xgene_perf_add(struct perf_event *event, int flags) +{ + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); + struct hw_perf_event *hw = &event->hw; + + hw->state = PERF_HES_UPTODATE | PERF_HES_STOPPED; + + /* Allocate an event counter */ + hw->idx = get_next_avail_cntr(pmu_dev); + if (hw->idx < 0) + return -EAGAIN; + + /* Update counter event pointer for Interrupt handler */ + pmu_dev->pmu_counter_event[hw->idx] = event; + + if (flags & PERF_EF_START) + xgene_perf_start(event, PERF_EF_RELOAD); + + return 0; +} + +static void xgene_perf_del(struct perf_event *event, int flags) +{ + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu); + struct hw_perf_event *hw = &event->hw; + + xgene_perf_stop(event, PERF_EF_UPDATE); + + /* clear the assigned counter */ + clear_avail_cntr(pmu_dev, GET_CNTR(event)); + + perf_event_update_userpage(event); + pmu_dev->pmu_counter_event[hw->idx] = NULL; +} + +static int xgene_init_perf(struct xgene_pmu_dev *pmu_dev, char *name) +{ + struct xgene_pmu *xgene_pmu; + + pmu_dev->max_period = PMU_CNT_MAX_PERIOD - 1; + /* First version PMU supports only single event counter */ + xgene_pmu = pmu_dev->parent; + if (xgene_pmu->version == PCP_PMU_V1) + pmu_dev->max_counters = 1; + else + pmu_dev->max_counters = PMU_MAX_COUNTERS; + + /* Perf driver registration */ + pmu_dev->pmu = (struct pmu) { + .attr_groups = pmu_dev->attr_groups, + .task_ctx_nr = perf_invalid_context, + .pmu_enable = xgene_perf_pmu_enable, + .pmu_disable = xgene_perf_pmu_disable, + .event_init = xgene_perf_event_init, + .add = xgene_perf_add, + .del = xgene_perf_del, + .start = xgene_perf_start, + .stop = xgene_perf_stop, + .read = xgene_perf_read, + }; + + /* Hardware counter init */ + xgene_pmu_stop_counters(pmu_dev); + xgene_pmu_reset_counters(pmu_dev); + + return perf_pmu_register(&pmu_dev->pmu, name, -1); +} + +static int +xgene_pmu_dev_add(struct xgene_pmu *xgene_pmu, struct xgene_pmu_dev_ctx *ctx) +{ + struct device *dev = xgene_pmu->dev; + struct xgene_pmu_dev *pmu; + int rc; + + pmu = devm_kzalloc(dev, sizeof(*pmu), GFP_KERNEL); + if (!pmu) + return -ENOMEM; + pmu->parent = xgene_pmu; + pmu->inf = &ctx->inf; + ctx->pmu_dev = pmu; + + switch (pmu->inf->type) { + case PMU_TYPE_L3C: + pmu->attr_groups = l3c_pmu_attr_groups; + break; + case PMU_TYPE_IOB: + pmu->attr_groups = iob_pmu_attr_groups; + break; + case PMU_TYPE_MCB: + if (!(xgene_pmu->mcb_active_mask & pmu->inf->enable_mask)) + goto dev_err; + pmu->attr_groups = mcb_pmu_attr_groups; + break; + case PMU_TYPE_MC: + if (!(xgene_pmu->mc_active_mask & pmu->inf->enable_mask)) + goto dev_err; + pmu->attr_groups = mc_pmu_attr_groups; + break; + default: + return -EINVAL; + } + + rc = xgene_init_perf(pmu, ctx->name); + if (rc) { + dev_err(dev, "%s PMU: Failed to init perf driver\n", ctx->name); + goto dev_err; + } + + dev_info(dev, "%s PMU registered\n", ctx->name); + + return rc; + +dev_err: + devm_kfree(dev, pmu); + return -ENODEV; +} + +static void _xgene_pmu_isr(int irq, struct xgene_pmu_dev *pmu_dev) +{ + struct xgene_pmu *xgene_pmu = pmu_dev->parent; + u32 pmovsr; + int idx; + + pmovsr = readl(pmu_dev->inf->csr + PMU_PMOVSR) & PMU_OVERFLOW_MASK; + if (!pmovsr) + return; + + /* Clear interrupt flag */ + if (xgene_pmu->version == PCP_PMU_V1) + writel(0x0, pmu_dev->inf->csr + PMU_PMOVSR); + else + writel(pmovsr, pmu_dev->inf->csr + PMU_PMOVSR); + + for (idx = 0; idx < PMU_MAX_COUNTERS; idx++) { + struct perf_event *event = pmu_dev->pmu_counter_event[idx]; + int overflowed = pmovsr & BIT(idx); + + /* Ignore if we don't have an event. */ + if (!event || !overflowed) + continue; + xgene_perf_event_update(event); + xgene_perf_event_set_period(event); + } +} + +static irqreturn_t xgene_pmu_isr(int irq, void *dev_id) +{ + struct xgene_pmu_dev_ctx *ctx; + struct xgene_pmu *xgene_pmu = dev_id; + unsigned long flags; + u32 val; + + raw_spin_lock_irqsave(&xgene_pmu->lock, flags); + + /* Get Interrupt PMU source */ + val = readl(xgene_pmu->pcppmu_csr + PCPPMU_INTSTATUS_REG); + if (val & PCPPMU_INT_MCU) { + list_for_each_entry(ctx, &xgene_pmu->mcpmus, next) { + _xgene_pmu_isr(irq, ctx->pmu_dev); + } + } + if (val & PCPPMU_INT_MCB) { + list_for_each_entry(ctx, &xgene_pmu->mcbpmus, next) { + _xgene_pmu_isr(irq, ctx->pmu_dev); + } + } + if (val & PCPPMU_INT_L3C) { + list_for_each_entry(ctx, &xgene_pmu->l3cpmus, next) { + _xgene_pmu_isr(irq, ctx->pmu_dev); + } + } + if (val & PCPPMU_INT_IOB) { + list_for_each_entry(ctx, &xgene_pmu->iobpmus, next) { + _xgene_pmu_isr(irq, ctx->pmu_dev); + } + } + + raw_spin_unlock_irqrestore(&xgene_pmu->lock, flags); + + return IRQ_HANDLED; +} + +static int acpi_pmu_probe_active_mcb_mcu(struct xgene_pmu *xgene_pmu, + struct platform_device *pdev) +{ + void __iomem *csw_csr, *mcba_csr, *mcbb_csr; + struct resource *res; + unsigned int reg; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + csw_csr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(csw_csr)) { + dev_err(&pdev->dev, "ioremap failed for CSW CSR resource\n"); + return PTR_ERR(csw_csr); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 2); + mcba_csr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(mcba_csr)) { + dev_err(&pdev->dev, "ioremap failed for MCBA CSR resource\n"); + return PTR_ERR(mcba_csr); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 3); + mcbb_csr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(mcbb_csr)) { + dev_err(&pdev->dev, "ioremap failed for MCBB CSR resource\n"); + return PTR_ERR(mcbb_csr); + } + + reg = readl(csw_csr + CSW_CSWCR); + if (reg & CSW_CSWCR_DUALMCB_MASK) { + /* Dual MCB active */ + xgene_pmu->mcb_active_mask = 0x3; + /* Probe all active MC(s) */ + reg = readl(mcbb_csr + CSW_CSWCR); + xgene_pmu->mc_active_mask = + (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5; + } else { + /* Single MCB active */ + xgene_pmu->mcb_active_mask = 0x1; + /* Probe all active MC(s) */ + reg = readl(mcba_csr + CSW_CSWCR); + xgene_pmu->mc_active_mask = + (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1; + } + + return 0; +} + +static int fdt_pmu_probe_active_mcb_mcu(struct xgene_pmu *xgene_pmu, + struct platform_device *pdev) +{ + struct regmap *csw_map, *mcba_map, *mcbb_map; + struct device_node *np = pdev->dev.of_node; + unsigned int reg; + + csw_map = syscon_regmap_lookup_by_phandle(np, "regmap-csw"); + if (IS_ERR(csw_map)) { + dev_err(&pdev->dev, "unable to get syscon regmap csw\n"); + return PTR_ERR(csw_map); + } + + mcba_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcba"); + if (IS_ERR(mcba_map)) { + dev_err(&pdev->dev, "unable to get syscon regmap mcba\n"); + return PTR_ERR(mcba_map); + } + + mcbb_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcbb"); + if (IS_ERR(mcbb_map)) { + dev_err(&pdev->dev, "unable to get syscon regmap mcbb\n"); + return PTR_ERR(mcbb_map); + } + + if (regmap_read(csw_map, CSW_CSWCR, ®)) + return -EINVAL; + + if (reg & CSW_CSWCR_DUALMCB_MASK) { + /* Dual MCB active */ + xgene_pmu->mcb_active_mask = 0x3; + /* Probe all active MC(s) */ + if (regmap_read(mcbb_map, MCBADDRMR, ®)) + return 0; + xgene_pmu->mc_active_mask = + (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5; + } else { + /* Single MCB active */ + xgene_pmu->mcb_active_mask = 0x1; + /* Probe all active MC(s) */ + if (regmap_read(mcba_map, MCBADDRMR, ®)) + return 0; + xgene_pmu->mc_active_mask = + (reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1; + } + + return 0; +} + +static int xgene_pmu_probe_active_mcb_mcu(struct xgene_pmu *xgene_pmu, + struct platform_device *pdev) +{ + if (has_acpi_companion(&pdev->dev)) + return acpi_pmu_probe_active_mcb_mcu(xgene_pmu, pdev); + return fdt_pmu_probe_active_mcb_mcu(xgene_pmu, pdev); +} + +static char *xgene_pmu_dev_name(struct device *dev, u32 type, int id) +{ + switch (type) { + case PMU_TYPE_L3C: + return devm_kasprintf(dev, GFP_KERNEL, "l3c%d", id); + case PMU_TYPE_IOB: + return devm_kasprintf(dev, GFP_KERNEL, "iob%d", id); + case PMU_TYPE_MCB: + return devm_kasprintf(dev, GFP_KERNEL, "mcb%d", id); + case PMU_TYPE_MC: + return devm_kasprintf(dev, GFP_KERNEL, "mc%d", id); + default: + return devm_kasprintf(dev, GFP_KERNEL, "unknown"); + } +} + +#if defined(CONFIG_ACPI) +static int acpi_pmu_dev_add_resource(struct acpi_resource *ares, void *data) +{ + struct resource *res = data; + + if (ares->type == ACPI_RESOURCE_TYPE_FIXED_MEMORY32) + acpi_dev_resource_memory(ares, res); + + /* Always tell the ACPI core to skip this resource */ + return 1; +} + +static struct +xgene_pmu_dev_ctx *acpi_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu, + struct acpi_device *adev, u32 type) +{ + struct device *dev = xgene_pmu->dev; + struct list_head resource_list; + struct xgene_pmu_dev_ctx *ctx; + const union acpi_object *obj; + struct hw_pmu_info *inf; + void __iomem *dev_csr; + struct resource res; + int enable_bit; + int rc; + + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return NULL; + + INIT_LIST_HEAD(&resource_list); + rc = acpi_dev_get_resources(adev, &resource_list, + acpi_pmu_dev_add_resource, &res); + acpi_dev_free_resource_list(&resource_list); + if (rc < 0 || IS_ERR(&res)) { + dev_err(dev, "PMU type %d: No resource address found\n", type); + goto err; + } + + dev_csr = devm_ioremap_resource(dev, &res); + if (IS_ERR(dev_csr)) { + dev_err(dev, "PMU type %d: Fail to map resource\n", type); + goto err; + } + + /* A PMU device node without enable-bit-index is always enabled */ + rc = acpi_dev_get_property(adev, "enable-bit-index", + ACPI_TYPE_INTEGER, &obj); + if (rc < 0) + enable_bit = 0; + else + enable_bit = (int) obj->integer.value; + + ctx->name = xgene_pmu_dev_name(dev, type, enable_bit); + if (!ctx->name) { + dev_err(dev, "PMU type %d: Fail to get device name\n", type); + goto err; + } + inf = &ctx->inf; + inf->type = type; + inf->csr = dev_csr; + inf->enable_mask = 1 << enable_bit; + + return ctx; +err: + devm_kfree(dev, ctx); + return NULL; |