[PATCH 3/4] perf: xgene: Add APM X-Gene SoC Performance Monitoring Unit driver
Tai Nguyen
ttnguyen at apm.com
Thu Mar 31 16:37:51 PDT 2016
perf: xgene: Add APM X-Gene SoC Performance Monitoring Unit driver
Signed-off-by: Tai Nguyen <ttnguyen at apm.com>
---
drivers/perf/Kconfig | 7 +
drivers/perf/Makefile | 1 +
drivers/perf/xgene_pmu.c | 1447 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 1455 insertions(+)
create mode 100644 drivers/perf/xgene_pmu.c
diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
index 04e2653..be597dd 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 SoC X-Gene 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 acd2397..b116e98 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 0000000..6f84786
--- /dev/null
+++ b/drivers/perf/xgene_pmu.c
@@ -0,0 +1,1447 @@
+/*
+ * APM X-Gene SoC PMU (Performance Monitor Unit)
+ *
+ * Copyright (c) 2016, Applied Micro Circuits Corporation
+ * Author: Hoan Tran <hotran at apm.com>
+ * Tai Nguyen <ttnguyen at 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/efi.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/of_fdt.h>
+#include <linux/of_irq.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/perf_event.h>
+#include <linux/module.h>
+#include <linux/cpumask.h>
+#include <linux/slab.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.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_VAL 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) ((u8)(ev->hw.extra_reg.reg))
+#define _GET_EVENTID(ev) (ev->hw.config & 0xFFULL)
+#define _GET_AGENTID(ev) (ev->hw.extra_reg.config & 0xFFFFFFFFULL)
+#define _GET_AGENT1ID(ev) ((ev->hw.extra_reg.config >> 32) & 0xFFFFFFFFULL)
+
+struct hw_pmu_info {
+ u32 id;
+ u32 type;
+ void __iomem *csr;
+};
+
+struct xgene_pmu_dev {
+ struct hw_pmu_info *inf;
+ struct pmu pmu;
+ u8 max_counters;
+ u64 cntr_assign_mask;
+ raw_spinlock_t lock;
+ u64 max_period;
+ const struct attribute_group *attr_groups[4];
+ struct perf_event *pmu_counter_event[4];
+ struct xgene_pmu *parent;
+};
+
+struct xgene_pmu {
+ struct device *dev;
+ int version;
+ void __iomem *pcppmu_csr;
+ struct list_head l3cpmus;
+ struct list_head iobpmus;
+ struct list_head mcbpmus;
+ struct list_head mcpmus;
+ u32 mcb_active_mask;
+ u32 mc_active_mask;
+};
+
+struct xgene_pmu_dev_ctx {
+ struct list_head next;
+ struct xgene_pmu_dev *pmu_dev;
+ struct hw_pmu_info inf;
+};
+
+#define format_group attr_groups[0]
+#define cpumask_group attr_groups[1]
+#define events_group attr_groups[2]
+#define null_group attr_groups[3]
+
+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
+ */
+#define XGENE_PMU_FORMAT_ATTR(_id, _name, _format) \
+static ssize_t \
+_id##_name##_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *page) \
+{ \
+ BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \
+ return sprintf(page, _format "\n"); \
+} \
+ \
+static struct device_attribute format_attr_##_id##_name = __ATTR_RO(_id##_name)
+
+XGENE_PMU_FORMAT_ATTR(l3c, eventid, "config:0-7");
+XGENE_PMU_FORMAT_ATTR(l3c, agentid, "config1:0-9");
+
+static struct attribute *l3cpmu_format_attrs[] = {
+ &format_attr_l3ceventid.attr,
+ &format_attr_l3cagentid.attr,
+ NULL,
+};
+
+static struct attribute_group xgene_l3cpmu_format_group = {
+ .name = "format",
+ .attrs = l3cpmu_format_attrs,
+};
+
+XGENE_PMU_FORMAT_ATTR(iob, eventid, "config:0-7");
+XGENE_PMU_FORMAT_ATTR(iob, agentid, "config1:0-63");
+
+static struct attribute *iobpmu_format_attrs[] = {
+ &format_attr_iobeventid.attr,
+ &format_attr_iobagentid.attr,
+ NULL,
+};
+
+static struct attribute_group xgene_iobpmu_format_group = {
+ .name = "format",
+ .attrs = iobpmu_format_attrs,
+};
+
+XGENE_PMU_FORMAT_ATTR(mcb, eventid, "config:0-5");
+XGENE_PMU_FORMAT_ATTR(mcb, agentid, "config1:0-9");
+
+static struct attribute *mcbpmu_format_attrs[] = {
+ &format_attr_mcbeventid.attr,
+ &format_attr_mcbagentid.attr,
+ NULL,
+};
+
+static struct attribute_group xgene_mcbpmu_format_group = {
+ .name = "format",
+ .attrs = mcbpmu_format_attrs,
+};
+
+XGENE_PMU_FORMAT_ATTR(mc, eventid, "config:0-28");
+
+static struct attribute *mcpmu_format_attrs[] = {
+ &format_attr_mceventid.attr,
+ NULL,
+ NULL,
+};
+
+static struct attribute_group xgene_mcpmu_format_group = {
+ .name = "format",
+ .attrs = mcpmu_format_attrs,
+};
+
+/*
+ * sysfs event attributes
+ */
+struct xgene_pmu_dev_event_desc {
+ struct kobj_attribute attr;
+ const char *event;
+};
+
+static ssize_t _xgene_pmu_event_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ struct xgene_pmu_dev_event_desc *event;
+
+ event = container_of(attr, struct xgene_pmu_dev_event_desc, attr);
+ return sprintf(buf, "%s\n", event->event);
+}
+
+#define XGENE_PMU_EVENT_DESC(_name, _event) \
+{ \
+ .attr = __ATTR(_name, 0444, _xgene_pmu_event_show, NULL), \
+ .event = _event, \
+}
+
+static struct xgene_pmu_dev_event_desc xgene_l3c_event_descs[] = {
+ XGENE_PMU_EVENT_DESC(cycle-count, "config=0x00"),
+ XGENE_PMU_EVENT_DESC(cycle-count-div-64, "config=0x01"),
+ XGENE_PMU_EVENT_DESC(read-hit, "config=0x02"),
+ XGENE_PMU_EVENT_DESC(read-miss, "config=0x03"),
+ XGENE_PMU_EVENT_DESC(write-need-replacement, "config=0x06"),
+ XGENE_PMU_EVENT_DESC(write-not-need-replacement, "config=0x07"),
+ XGENE_PMU_EVENT_DESC(tq-full, "config=0x08"),
+ XGENE_PMU_EVENT_DESC(ackq-full, "config=0x09"),
+ XGENE_PMU_EVENT_DESC(wdb-full, "config=0x0a"),
+ XGENE_PMU_EVENT_DESC(bank-fifo-full, "config=0x0b"),
+ XGENE_PMU_EVENT_DESC(odb-full, "config=0x0c"),
+ XGENE_PMU_EVENT_DESC(wbq-full, "config=0x0d"),
+ XGENE_PMU_EVENT_DESC(bank-conflict-fifo-issue, "config=0x0e"),
+ XGENE_PMU_EVENT_DESC(bank-fifo-issue, "config=0x0f"),
+ { },
+};
+
+static struct xgene_pmu_dev_event_desc xgene_iob_event_descs[] = {
+ XGENE_PMU_EVENT_DESC(cycle-count, "config=0x00"),
+ XGENE_PMU_EVENT_DESC(cycle-count-div-64, "config=0x01"),
+ XGENE_PMU_EVENT_DESC(axi0-read, "config=0x02"),
+ XGENE_PMU_EVENT_DESC(axi0-read-partial, "config=0x03"),
+ XGENE_PMU_EVENT_DESC(axi1-read, "config=0x04"),
+ XGENE_PMU_EVENT_DESC(axi1-read-partial, "config=0x05"),
+ XGENE_PMU_EVENT_DESC(csw-read-block, "config=0x06"),
+ XGENE_PMU_EVENT_DESC(csw-read-partial, "config=0x07"),
+ XGENE_PMU_EVENT_DESC(axi0-write, "config=0x10"),
+ XGENE_PMU_EVENT_DESC(axi0-write-partial, "config=0x11"),
+ XGENE_PMU_EVENT_DESC(axi1-write, "config=0x13"),
+ XGENE_PMU_EVENT_DESC(axi1-write-partial, "config=0x14"),
+ XGENE_PMU_EVENT_DESC(csw-inbound-dirty, "config=0x16"),
+ { },
+};
+
+static struct xgene_pmu_dev_event_desc xgene_mcb_event_descs[] = {
+ XGENE_PMU_EVENT_DESC(cycle-count, "config=0x00"),
+ XGENE_PMU_EVENT_DESC(cycle-count-div-64, "config=0x01"),
+ XGENE_PMU_EVENT_DESC(csw-read, "config=0x02"),
+ XGENE_PMU_EVENT_DESC(csw-write-request, "config=0x03"),
+ XGENE_PMU_EVENT_DESC(mcb-csw-stall, "config=0x04"),
+ XGENE_PMU_EVENT_DESC(cancel-read-gack, "config=0x05"),
+ { },
+};
+
+static struct xgene_pmu_dev_event_desc xgene_mc_event_descs[] = {
+ XGENE_PMU_EVENT_DESC(cycle-count, "config=0x00"),
+ XGENE_PMU_EVENT_DESC(cycle-count-div-64, "config=0x01"),
+ XGENE_PMU_EVENT_DESC(act-cmd-sent, "config=0x02"),
+ XGENE_PMU_EVENT_DESC(pre-cmd-sent, "config=0x03"),
+ XGENE_PMU_EVENT_DESC(rd-cmd-sent, "config=0x04"),
+ XGENE_PMU_EVENT_DESC(rda-cmd-sent, "config=0x05"),
+ XGENE_PMU_EVENT_DESC(wr-cmd-sent, "config=0x06"),
+ XGENE_PMU_EVENT_DESC(wra-cmd-sent, "config=0x07"),
+ XGENE_PMU_EVENT_DESC(pde-cmd-sent, "config=0x08"),
+ XGENE_PMU_EVENT_DESC(sre-cmd-sent, "config=0x09"),
+ XGENE_PMU_EVENT_DESC(prea-cmd-sent, "config=0x0a"),
+ XGENE_PMU_EVENT_DESC(ref-cmd-sent, "config=0x0b"),
+ XGENE_PMU_EVENT_DESC(rd-rda-cmd-sent, "config=0x0c"),
+ XGENE_PMU_EVENT_DESC(wr-wra-cmd-sent, "config=0x0d"),
+ XGENE_PMU_EVENT_DESC(in-rd-collision, "config=0x0e"),
+ XGENE_PMU_EVENT_DESC(in-wr-collision, "config=0x0f"),
+ XGENE_PMU_EVENT_DESC(collision-queue-not-empty, "config=0x10"),
+ XGENE_PMU_EVENT_DESC(collision-queue-full, "config=0x11"),
+ XGENE_PMU_EVENT_DESC(mcu-request, "config=0x12"),
+ XGENE_PMU_EVENT_DESC(mcu-rd-request, "config=0x13"),
+ XGENE_PMU_EVENT_DESC(mcu-hp-rd-request, "config=0x14"),
+ XGENE_PMU_EVENT_DESC(mcu-wr-request, "config=0x15"),
+ XGENE_PMU_EVENT_DESC(mcu-rd-proceed-all, "config=0x16"),
+ XGENE_PMU_EVENT_DESC(mcu-rd-proceed-cancel, "config=0x17"),
+ XGENE_PMU_EVENT_DESC(mcu-rd-response, "config=0x18"),
+ XGENE_PMU_EVENT_DESC(mcu-rd-proceed-speculative-all, "config=0x19"),
+ XGENE_PMU_EVENT_DESC(mcu-rd-proceed-speculative-cancel, "config=0x1a"),
+ XGENE_PMU_EVENT_DESC(mcu-wr-proceed-all, "config=0x1b"),
+ XGENE_PMU_EVENT_DESC(mcu-wr-proceed-cancel, "config=0x1c"),
+ { },
+};
+
+/*
+ * sysfs cpumask attributes
+ */
+static cpumask_t xgene_pmu_cpumask;
+
+static ssize_t xgene_pmu_cpumask_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return cpumap_print_to_pagebuf(true, buf, &xgene_pmu_cpumask);
+}
+static DEVICE_ATTR(cpumask, S_IRUGO, xgene_pmu_cpumask_show, NULL);
+
+static struct attribute *xgene_pmu_cpumask_attrs[] = {
+ &dev_attr_cpumask.attr,
+ NULL,
+};
+
+static struct attribute_group xgene_pmu_cpumask_group = {
+ .attrs = xgene_pmu_cpumask_attrs,
+};
+
+static int get_next_avail_cntr(struct xgene_pmu_dev *pmu_dev)
+{
+ int shift, cntr, retval;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&pmu_dev->lock, flags);
+
+ for (cntr = 0; cntr < pmu_dev->max_counters; cntr++) {
+ shift = cntr;
+ if (!(pmu_dev->cntr_assign_mask & (1ULL << shift))) {
+ pmu_dev->cntr_assign_mask |= (1ULL << shift);
+ retval = cntr;
+ goto out;
+ }
+ }
+ retval = -ENOSPC;
+
+out:
+ raw_spin_unlock_irqrestore(&pmu_dev->lock, flags);
+
+ return retval;
+}
+
+static int clear_avail_cntr(struct xgene_pmu_dev *pmu_dev, u8 cntr)
+{
+ unsigned long flags;
+ int shift;
+
+ if (cntr > pmu_dev->max_counters)
+ return -EINVAL;
+
+ shift = cntr;
+
+ raw_spin_lock_irqsave(&pmu_dev->lock, flags);
+ pmu_dev->cntr_assign_mask &= ~(1ULL << shift);
+ raw_spin_unlock_irqrestore(&pmu_dev->lock, flags);
+
+ return 0;
+}
+
+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_agenttype(struct xgene_pmu_dev *pmu_dev, u32 val)
+{
+ writel(val, pmu_dev->inf->csr + PMU_PMAMR0);
+}
+
+static inline void
+xgene_pmu_write_agent1type(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 int xgene_perf_event_init(struct perf_event *event)
+{
+ struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+ u64 config, config1;
+
+ /* 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;
+
+ if (event->pmu != &pmu_dev->pmu)
+ return -ENOENT;
+
+ if (pmu_dev) {
+ config = event->attr.config;
+ config1 = event->attr.config1;
+ } else {
+ return -EINVAL;
+ }
+
+ if (pmu_dev->max_counters == 0)
+ return -EINVAL;
+
+ hwc->config = config;
+ if (config1)
+ hwc->extra_reg.config = config1;
+ else
+ /* Enable all Agents */
+ hwc->extra_reg.config = 0xFFFFFFFFFFFFFFFFULL;
+
+ 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_agenttype(pmu_dev, _GET_AGENTID(event));
+ if (pmu_dev->inf->type == PMU_TYPE_IOB)
+ xgene_pmu_write_agent1type(pmu_dev, _GET_AGENT1ID(event));
+
+ xgene_pmu_start_counters(pmu_dev);
+ 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_start(struct perf_event *event, int flags)
+{
+ struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+
+ if (WARN_ON_ONCE(!(hwc->state & PERF_HES_STOPPED)))
+ return;
+
+ WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
+ hwc->state = 0;
+
+ if (flags & PERF_EF_RELOAD) {
+ u64 prev_raw_count = local64_read(&hwc->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_read(struct perf_event *event)
+{
+ struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+ u64 prev_raw_count;
+ u64 count;
+ u64 delta;
+
+ count = xgene_pmu_read_counter(pmu_dev, _GET_CNTR(event))
+ & pmu_dev->max_period;
+
+ prev_raw_count = local64_read(&hwc->prev_count);
+ if (local64_cmpxchg(&hwc->prev_count, prev_raw_count, count)
+ != prev_raw_count)
+ return;
+
+ delta = (count - prev_raw_count) & pmu_dev->max_period;
+
+ local64_add(delta, &event->count);
+}
+
+static void xgene_perf_stop(struct perf_event *event, int flags)
+{
+ struct hw_perf_event *hwc = &event->hw;
+ u64 config;
+
+ if (hwc->state & PERF_HES_UPTODATE)
+ return;
+
+ xgene_perf_disable_event(event);
+ WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED);
+ hwc->state |= PERF_HES_STOPPED;
+
+ if (hwc->state & PERF_HES_UPTODATE)
+ return;
+
+ config = hwc->config;
+ xgene_perf_read(event);
+ hwc->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);
+ int retval;
+
+ event->hw.state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
+
+ retval = get_next_avail_cntr(pmu_dev);
+ if (retval != -ENOSPC)
+ event->hw.extra_reg.reg = (u16) retval;
+ else
+ return retval;
+
+ if (flags & PERF_EF_START)
+ xgene_perf_start(event, PERF_EF_RELOAD);
+
+ /* Update counter event pointer for Interrupt handler */
+ pmu_dev->pmu_counter_event[retval] = event;
+
+ return 0;
+}
+
+static void xgene_perf_del(struct perf_event *event, int flags)
+{
+ struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
+
+ xgene_perf_stop(event, PERF_EF_UPDATE);
+
+ /* clear the assigned counter */
+ clear_avail_cntr(pmu_dev, _GET_CNTR(event));
+
+ perf_event_update_userpage(event);
+}
+
+static int xgene_init_events_attrs(struct xgene_pmu_dev *pmu_dev,
+ struct xgene_pmu_dev_event_desc *event_desc)
+{
+ struct attribute_group *attr_group;
+ struct attribute **attrs;
+ int i = 0, j;
+
+ while (event_desc[i].attr.attr.name)
+ i++;
+
+ attr_group = devm_kzalloc(pmu_dev->parent->dev,
+ sizeof(struct attribute *) * (i + 1)
+ + sizeof(*attr_group), GFP_KERNEL);
+ if (!attr_group)
+ return -ENOMEM;
+
+ attrs = (struct attribute **)(attr_group + 1);
+ for (j = 0; j < i; j++)
+ attrs[j] = &event_desc[j].attr.attr;
+
+ attr_group->name = "events";
+ attr_group->attrs = attrs;
+ pmu_dev->events_group = attr_group;
+
+ return 0;
+}
+
+static void xgene_pc_exit(struct xgene_pmu_dev *pmu_dev)
+{
+ if (pmu_dev->events_group != NULL) {
+ devm_kfree(pmu_dev->parent->dev,
+ (void *) pmu_dev->events_group);
+ pmu_dev->events_group = NULL;
+ }
+}
+
+static u64 xgene_perf_event_update(struct perf_event *event,
+ struct hw_perf_event *hwc, int idx)
+{
+ struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
+ u64 delta, prev_raw_count, new_raw_count;
+
+again:
+ prev_raw_count = local64_read(&hwc->prev_count);
+ new_raw_count = pmu_dev->max_period;
+
+ if (local64_cmpxchg(&hwc->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);
+ local64_sub(delta, &hwc->period_left);
+
+ return new_raw_count;
+}
+
+static int xgene_perf_event_set_period(struct perf_event *event,
+ struct hw_perf_event *hwc, int idx)
+{
+ struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
+ s64 left = local64_read(&hwc->period_left);
+ s64 period = hwc->sample_period;
+ int ret = 0;
+
+ if (unlikely(left <= -period)) {
+ left = period;
+ local64_set(&hwc->period_left, left);
+ hwc->last_period = period;
+ ret = 1;
+ }
+
+ if (unlikely(left <= 0)) {
+ left += period;
+ local64_set(&hwc->period_left, left);
+ hwc->last_period = period;
+ ret = 1;
+ }
+
+ /*
+ * Limit the maximum period to prevent the counter value
+ * from overtaking the one we are about to program. In
+ * effect we are reducing max_period to account for
+ * interrupt latency (and we are being very conservative).
+ */
+ if (left > (pmu_dev->max_period >> 1))
+ left = pmu_dev->max_period >> 1;
+
+ local64_set(&hwc->prev_count, (u64) -left);
+
+ xgene_pmu_write_counter(pmu_dev, idx, (u64)(-left) & 0xffffffff);
+
+ perf_event_update_userpage(event);
+
+ return ret;
+}
+
+static void xgene_perf_pmu_init(struct xgene_pmu_dev *pmu_dev)
+{
+ pmu_dev->pmu.event_init = xgene_perf_event_init;
+ pmu_dev->pmu.add = xgene_perf_add;
+ pmu_dev->pmu.del = xgene_perf_del;
+ pmu_dev->pmu.start = xgene_perf_start;
+ pmu_dev->pmu.stop = xgene_perf_stop;
+ pmu_dev->pmu.read = xgene_perf_read;
+}
+
+static int xgene_init_perf(struct xgene_pmu_dev *pmu_dev, char *name)
+{
+ struct xgene_pmu *xgene_pmu;
+ int ret;
+
+ raw_spin_lock_init(&pmu_dev->lock);
+
+ pmu_dev->cpumask_group = &xgene_pmu_cpumask_group;
+
+ pmu_dev->max_period = PMU_CNT_MAX_VAL - 1;
+ /* First PMU version supports only single event counter */
+ xgene_pmu = pmu_dev->parent;
+ if (xgene_pmu->version == 1)
+ pmu_dev->max_counters = 1;
+ else
+ pmu_dev->max_counters = PMU_MAX_COUNTERS;
+
+ /* Init null attributes */
+ pmu_dev->null_group = NULL;
+ pmu_dev->pmu.attr_groups = pmu_dev->attr_groups;
+
+ /* Hardware counter init */
+ xgene_pmu_stop_counters(pmu_dev);
+ xgene_pmu_reset_counters(pmu_dev);
+
+ xgene_perf_pmu_init(pmu_dev);
+ ret = perf_pmu_register(&pmu_dev->pmu, name, -1);
+ if (ret)
+ xgene_pc_exit(pmu_dev);
+
+ return ret;
+}
+
+static int
+xgene_pmu_dev_add(struct xgene_pmu *xgene_pmu, struct xgene_pmu_dev_ctx *ctx)
+{
+ struct xgene_pmu_dev *pmu;
+ struct device *dev = xgene_pmu->dev;
+ struct attribute_group *format_group;
+ struct xgene_pmu_dev_event_desc *event_desc;
+ char name[10];
+ 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:
+ format_group = &xgene_l3cpmu_format_group;
+ event_desc = xgene_l3c_event_descs;
+ sprintf(name, "l3c%d", pmu->inf->id);
+ break;
+ case PMU_TYPE_IOB:
+ format_group = &xgene_iobpmu_format_group;
+ event_desc = xgene_iob_event_descs;
+ sprintf(name, "iob%d", pmu->inf->id);
+ break;
+ case PMU_TYPE_MCB:
+ if (!(xgene_pmu->mcb_active_mask & (1 << pmu->inf->id)))
+ goto dev_err;
+ format_group = &xgene_mcbpmu_format_group;
+ event_desc = xgene_mcb_event_descs;
+ sprintf(name, "mcb%d", pmu->inf->id);
+ break;
+ case PMU_TYPE_MC:
+ if (!(xgene_pmu->mc_active_mask & (1 << pmu->inf->id)))
+ goto dev_err;
+ format_group = &xgene_mcpmu_format_group;
+ event_desc = xgene_mc_event_descs;
+ sprintf(name, "mc%d", pmu->inf->id);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Init agent attributes */
+ pmu->format_group = format_group;
+ /* Init events attributes */
+ if (xgene_init_events_attrs(pmu, event_desc))
+ pr_err("PMU: Only support raw events.\n");
+ rc = xgene_init_perf(pmu, name);
+ if (!rc)
+ dev_info(dev, "%s PMU registered\n", name);
+
+ return rc;
+
+dev_err:
+ devm_kfree(dev, pmu);
+ return -ENODEV;
+}
+
+static irqreturn_t _xgene_pmu_isr(int irq, struct xgene_pmu_dev *pmu_dev)
+{
+ struct perf_event *event = NULL;
+ struct perf_sample_data data;
+ struct xgene_pmu *xgene_pmu;
+ struct hw_perf_event *hwc;
+ struct pt_regs *regs;
+ int idx;
+ u32 val;
+
+ /* Get interrupt counter source */
+ val = readl(pmu_dev->inf->csr + PMU_PMOVSR);
+ idx = ffs(val) - 1;
+ if (!(val & PMU_OVERFLOW_MASK))
+ goto out;
+ event = pmu_dev->pmu_counter_event[idx];
+
+ /*
+ * Handle the counter(s) overflow(s)
+ */
+ regs = get_irq_regs();
+
+ /* Ignore if we don't have an event. */
+ if (!event)
+ goto out;
+
+ hwc = &event->hw;
+
+ xgene_perf_event_update(event, hwc, idx);
+ perf_sample_data_init(&data, 0, hwc->last_period);
+ if (!xgene_perf_event_set_period(event, hwc, idx))
+ goto out;
+
+ if (perf_event_overflow(event, &data, regs))
+ xgene_perf_disable_event(event);
+
+out:
+ /* Clear interrupt flag */
+ xgene_pmu = pmu_dev->parent;
+ if (xgene_pmu->version == 1)
+ writel(0x0, pmu_dev->inf->csr + PMU_PMOVSR);
+ else
+ writel(val, pmu_dev->inf->csr + PMU_PMOVSR);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t xgene_pmu_isr(int irq, void *dev_id)
+{
+ struct xgene_pmu_dev_ctx *ctx, *temp_ctx;
+ struct xgene_pmu *xgene_pmu = dev_id;
+ u32 val;
+
+ xgene_pmu_mask_int(xgene_pmu);
+
+ /* Get Interrupt PMU source */
+ val = readl(xgene_pmu->pcppmu_csr + PCPPMU_INTSTATUS_REG)
+ & PCPPMU_INTMASK;
+ if (val & PCPPMU_INT_MCU) {
+ list_for_each_entry_safe(ctx, temp_ctx,
+ &xgene_pmu->mcpmus, next) {
+ _xgene_pmu_isr(irq, ctx->pmu_dev);
+ }
+ }
+ if (val & PCPPMU_INT_MCB) {
+ list_for_each_entry_safe(ctx, temp_ctx,
+ &xgene_pmu->mcbpmus, next) {
+ _xgene_pmu_isr(irq, ctx->pmu_dev);
+ }
+ }
+ if (val & PCPPMU_INT_L3C) {
+ list_for_each_entry_safe(ctx, temp_ctx,
+ &xgene_pmu->l3cpmus, next) {
+ _xgene_pmu_isr(irq, ctx->pmu_dev);
+ }
+ }
+ if (val & PCPPMU_INT_IOB) {
+ list_for_each_entry_safe(ctx, temp_ctx,
+ &xgene_pmu->iobpmus, next) {
+ _xgene_pmu_isr(irq, ctx->pmu_dev);
+ }
+ }
+
+ xgene_pmu_unmask_int(xgene_pmu);
+
+ 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 (efi_enabled(EFI_BOOT))
+ return acpi_pmu_probe_active_mcb_mcu(xgene_pmu, pdev);
+ else
+ return fdt_pmu_probe_active_mcb_mcu(xgene_pmu, pdev);
+}
+
+#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;
+ u32 id;
+ 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);
+ rc = PTR_ERR(dev_csr);
+ goto err;
+ }
+
+ rc = acpi_dev_get_property(adev, "index", ACPI_TYPE_INTEGER, &obj);
+ if (rc < 0) {
+ dev_err(&adev->dev, "No index property found\n");
+ id = 0;
+ } else {
+ id = (u32) obj->integer.value;
+ }
+
+ inf = &ctx->inf;
+ inf->type = type;
+ inf->csr = dev_csr;
+ inf->id = id;
+
+ return ctx;
+err:
+ devm_kfree(dev, ctx);
+ return NULL;
+}
+
+static acpi_status acpi_pmu_dev_add(acpi_handle handle, u32 level,
+ void *data, void **return_value)
+{
+ struct xgene_pmu *xgene_pmu = data;
+ struct xgene_pmu_dev_ctx *ctx;
+ struct acpi_device *adev;
+
+ if (acpi_bus_get_device(handle, &adev))
+ return AE_OK;
+ if (acpi_bus_get_status(adev) || !adev->status.present)
+ return AE_OK;
+
+ if (!strcmp(acpi_device_hid(adev), "APMC0D5D"))
+ ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_L3C);
+ else if (!strcmp(acpi_device_hid(adev), "APMC0D5E"))
+ ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_IOB);
+ else if (!strcmp(acpi_device_hid(adev), "APMC0D5F"))
+ ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_MCB);
+ else if (!strcmp(acpi_device_hid(adev), "APMC0D60"))
+ ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_MC);
+ else
+ ctx = NULL;
+
+ if (!ctx)
+ return AE_OK;
+
+ if (xgene_pmu_dev_add(xgene_pmu, ctx))
+ return AE_OK;
+
+ switch (ctx->inf.type) {
+ case PMU_TYPE_L3C:
+ list_add(&ctx->next, &xgene_pmu->l3cpmus);
+ break;
+ case PMU_TYPE_IOB:
+ list_add(&ctx->next, &xgene_pmu->iobpmus);
+ break;
+ case PMU_TYPE_MCB:
+ list_add(&ctx->next, &xgene_pmu->mcbpmus);
+ break;
+ case PMU_TYPE_MC:
+ list_add(&ctx->next, &xgene_pmu->mcpmus);
+ break;
+ }
+ return AE_OK;
+}
+
+static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
+ struct platform_device *pdev)
+{
+ struct device *dev = xgene_pmu->dev;
+ acpi_handle handle;
+ acpi_status status;
+
+ handle = ACPI_HANDLE(dev);
+ if (!handle)
+ return -EINVAL;
+
+ status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
+ acpi_pmu_dev_add, NULL, xgene_pmu, NULL);
+ if (ACPI_FAILURE(status))
+ dev_err(dev, "failed to probe PMU devices\n");
+ return 0;
+}
+#else
+static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
+ struct platform_device *pdev)
+{
+ return 0;
+}
+#endif
+
+static struct
+xgene_pmu_dev_ctx *fdt_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu,
+ struct device_node *np, u32 type)
+{
+ struct device *dev = xgene_pmu->dev;
+ struct xgene_pmu_dev_ctx *ctx;
+ struct hw_pmu_info *inf;
+ void __iomem *dev_csr;
+ struct resource res;
+ u32 id;
+ int rc;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return NULL;
+ rc = of_address_to_resource(np, 0, &res);
+ if (rc < 0) {
+ 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);
+ rc = PTR_ERR(dev_csr);
+ goto err;
+ }
+
+ if (of_property_read_u32(np, "index", &id)) {
+ dev_err(dev, "PMU type %d: No index property found\n", type);
+ id = 0;
+ }
+
+ inf = &ctx->inf;
+ inf->type = type;
+ inf->csr = dev_csr;
+ inf->id = id;
+
+ return ctx;
+err:
+ devm_kfree(dev, ctx);
+ return NULL;
+}
+
+static int fdt_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
+ struct platform_device *pdev)
+{
+ struct xgene_pmu_dev_ctx *ctx;
+ struct device_node *np;
+
+ for_each_child_of_node(pdev->dev.of_node, np) {
+ if (!of_device_is_available(np))
+ continue;
+
+ if (of_device_is_compatible(np, "apm,xgene-pmu-l3c"))
+ ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_L3C);
+ else if (of_device_is_compatible(np, "apm,xgene-pmu-iob"))
+ ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_IOB);
+ else if (of_device_is_compatible(np, "apm,xgene-pmu-mcb"))
+ ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MCB);
+ else if (of_device_is_compatible(np, "apm,xgene-pmu-mc"))
+ ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MC);
+ else
+ ctx = NULL;
+
+ if (!ctx)
+ continue;
+
+ if (xgene_pmu_dev_add(xgene_pmu, ctx))
+ continue;
+
+ switch (ctx->inf.type) {
+ case PMU_TYPE_L3C:
+ list_add(&ctx->next, &xgene_pmu->l3cpmus);
+ break;
+ case PMU_TYPE_IOB:
+ list_add(&ctx->next, &xgene_pmu->iobpmus);
+ break;
+ case PMU_TYPE_MCB:
+ list_add(&ctx->next, &xgene_pmu->mcbpmus);
+ break;
+ case PMU_TYPE_MC:
+ list_add(&ctx->next, &xgene_pmu->mcpmus);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int xgene_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
+ struct platform_device *pdev)
+{
+ if (efi_enabled(EFI_BOOT))
+ return acpi_pmu_probe_pmu_dev(xgene_pmu, pdev);
+ else
+ return fdt_pmu_probe_pmu_dev(xgene_pmu, pdev);
+}
+
+static const struct xgene_pmu_data xgene_pmu_data = {
+ .id = PCP_PMU_V1,
+ .data = 0,
+};
+
+static const struct xgene_pmu_data xgene_pmu_v2_data = {
+ .id = PCP_PMU_V2,
+ .data = 0,
+};
+
+static const struct of_device_id xgene_pmu_of_match[] = {
+ { .compatible = "apm,xgene-pmu", .data = &xgene_pmu_data },
+ { .compatible = "apm,xgene-pmu-v2", .data = &xgene_pmu_v2_data },
+ {},
+};
+MODULE_DEVICE_TABLE(of, xgene_pmu_of_match);
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id xgene_pmu_acpi_match[] = {
+ {"APMC0D5B", PCP_PMU_V1},
+ {"APMC0D5C", PCP_PMU_V2},
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, xgene_pmu_acpi_match);
+#endif
+
+static int xgene_pmu_probe(struct platform_device *pdev)
+{
+ const struct xgene_pmu_data *dev_data;
+ const struct of_device_id *of_id;
+ struct xgene_pmu *xgene_pmu;
+ struct resource *res;
+ int version, dev_id;
+ int irq, rc;
+
+ xgene_pmu = devm_kzalloc(&pdev->dev, sizeof(*xgene_pmu), GFP_KERNEL);
+ if (!xgene_pmu)
+ return -ENOMEM;
+ xgene_pmu->dev = &pdev->dev;
+ platform_set_drvdata(pdev, xgene_pmu);
+
+ dev_id = -EINVAL;
+ of_id = of_match_device(xgene_pmu_of_match, &pdev->dev);
+ if (of_id) {
+ dev_data = (const struct xgene_pmu_data *) of_id->data;
+ dev_id = dev_data->id;
+ }
+
+#ifdef CONFIG_ACPI
+ if (ACPI_COMPANION(&pdev->dev)) {
+ const struct acpi_device_id *acpi_id;
+
+ acpi_id = acpi_match_device(xgene_pmu_acpi_match, &pdev->dev);
+ if (acpi_id)
+ dev_id = (int) acpi_id->driver_data;
+ }
+#endif
+ if (dev_id < 0)
+ return -ENODEV;
+
+ version = (dev_id == PCP_PMU_V1) ? 1 : 2;
+
+ INIT_LIST_HEAD(&xgene_pmu->l3cpmus);
+ INIT_LIST_HEAD(&xgene_pmu->iobpmus);
+ INIT_LIST_HEAD(&xgene_pmu->mcbpmus);
+ INIT_LIST_HEAD(&xgene_pmu->mcpmus);
+
+ xgene_pmu->version = version;
+ dev_info(&pdev->dev, "X-Gene PMU version %d\n", xgene_pmu->version);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ xgene_pmu->pcppmu_csr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(xgene_pmu->pcppmu_csr)) {
+ dev_err(&pdev->dev, "ioremap failed for PCP PMU resource\n");
+ rc = PTR_ERR(xgene_pmu->pcppmu_csr);
+ goto err;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "No IRQ resource\n");
+ rc = -EINVAL;
+ goto err;
+ }
+ rc = devm_request_irq(&pdev->dev, irq, xgene_pmu_isr, IRQF_SHARED,
+ dev_name(&pdev->dev), xgene_pmu);
+ if (rc) {
+ dev_err(&pdev->dev, "Could not request IRQ %d\n", irq);
+ goto err;
+ }
+
+ /* Check for active MCBs and MCUs */
+ rc = xgene_pmu_probe_active_mcb_mcu(xgene_pmu, pdev);
+ if (rc) {
+ dev_warn(&pdev->dev, "Unknown MCB/MCU active status\n");
+ xgene_pmu->mcb_active_mask = 0x1;
+ xgene_pmu->mc_active_mask = 0x1;
+ }
+
+ /* Init cpumask attributes to only core 0 */
+ cpumask_set_cpu(0, &xgene_pmu_cpumask);
+
+ /* Enable interrupt */
+ xgene_pmu_unmask_int(xgene_pmu);
+
+ /* Walk through the tree for all PMU perf devices */
+ rc = xgene_pmu_probe_pmu_dev(xgene_pmu, pdev);
+ if (rc) {
+ dev_err(&pdev->dev, "No PMU perf devices found!\n");
+ goto err;
+ }
+
+ return 0;
+
+err:
+ if (xgene_pmu->pcppmu_csr)
+ devm_iounmap(&pdev->dev, xgene_pmu->pcppmu_csr);
+ devm_kfree(&pdev->dev, xgene_pmu);
+
+ return rc;
+}
+
+static void
+xgene_pmu_dev_cleanup(struct xgene_pmu *xgene_pmu, struct list_head *pmus)
+{
+ struct xgene_pmu_dev_ctx *ctx, *temp_ctx;
+ struct device *dev = xgene_pmu->dev;
+ struct xgene_pmu_dev *pmu_dev;
+
+ list_for_each_entry_safe(ctx, temp_ctx, pmus, next) {
+ pmu_dev = ctx->pmu_dev;
+ if (pmu_dev->inf->csr)
+ devm_iounmap(dev, pmu_dev->inf->csr);
+ devm_kfree(dev, ctx);
+ devm_kfree(dev, pmu_dev);
+ }
+}
+
+static int xgene_pmu_remove(struct platform_device *pdev)
+{
+ struct xgene_pmu *xgene_pmu = dev_get_drvdata(&pdev->dev);
+
+ xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->l3cpmus);
+ xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->iobpmus);
+ xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcbpmus);
+ xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcpmus);
+
+ if (xgene_pmu->pcppmu_csr)
+ devm_iounmap(&pdev->dev, xgene_pmu->pcppmu_csr);
+ devm_kfree(&pdev->dev, xgene_pmu);
+
+ return 0;
+}
+
+static struct platform_driver xgene_pmu_driver = {
+ .probe = xgene_pmu_probe,
+ .remove = xgene_pmu_remove,
+ .driver = {
+ .name = "xgene-pmu",
+ .of_match_table = xgene_pmu_of_match,
+ .acpi_match_table = ACPI_PTR(xgene_pmu_acpi_match),
+ },
+};
+
+module_platform_driver(xgene_pmu_driver);
+
+MODULE_DESCRIPTION("APM X-Gene SoC PMU driver");
+MODULE_AUTHOR("Hoan Tran <hotran at apm.com>");
+MODULE_AUTHOR("Tai Nguyen <ttnguyen at apm.com>");
+MODULE_LICENSE("GPL");
--
1.9.1
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