Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 165 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_pmu.h b/drivers/gpu/drm/i915/i915_pmu.h
new file mode 100644
index 000000000..449057648
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_pmu.h
@@ -0,0 +1,165 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright © 2017-2018 Intel Corporation
+ */
+
+#ifndef __I915_PMU_H__
+#define __I915_PMU_H__
+
+#include <linux/hrtimer.h>
+#include <linux/perf_event.h>
+#include <linux/spinlock_types.h>
+#include <uapi/drm/i915_drm.h>
+
+struct drm_i915_private;
+
+/**
+ * Non-engine events that we need to track enabled-disabled transition and
+ * current state.
+ */
+enum i915_pmu_tracked_events {
+	__I915_PMU_ACTUAL_FREQUENCY_ENABLED = 0,
+	__I915_PMU_REQUESTED_FREQUENCY_ENABLED,
+	__I915_PMU_RC6_RESIDENCY_ENABLED,
+	__I915_PMU_TRACKED_EVENT_COUNT, /* count marker */
+};
+
+/**
+ * Slots used from the sampling timer (non-engine events) with some extras for
+ * convenience.
+ */
+enum {
+	__I915_SAMPLE_FREQ_ACT = 0,
+	__I915_SAMPLE_FREQ_REQ,
+	__I915_SAMPLE_RC6,
+	__I915_SAMPLE_RC6_LAST_REPORTED,
+	__I915_NUM_PMU_SAMPLERS
+};
+
+/**
+ * How many different events we track in the global PMU mask.
+ *
+ * It is also used to know to needed number of event reference counters.
+ */
+#define I915_PMU_MASK_BITS \
+	(I915_ENGINE_SAMPLE_COUNT + __I915_PMU_TRACKED_EVENT_COUNT)
+
+#define I915_ENGINE_SAMPLE_COUNT (I915_SAMPLE_SEMA + 1)
+
+struct i915_pmu_sample {
+	u64 cur;
+};
+
+struct i915_pmu {
+	/**
+	 * @cpuhp: Struct used for CPU hotplug handling.
+	 */
+	struct {
+		struct hlist_node node;
+		unsigned int cpu;
+	} cpuhp;
+	/**
+	 * @base: PMU base.
+	 */
+	struct pmu base;
+	/**
+	 * @closed: i915 is unregistering.
+	 */
+	bool closed;
+	/**
+	 * @name: Name as registered with perf core.
+	 */
+	const char *name;
+	/**
+	 * @lock: Lock protecting enable mask and ref count handling.
+	 */
+	spinlock_t lock;
+	/**
+	 * @timer: Timer for internal i915 PMU sampling.
+	 */
+	struct hrtimer timer;
+	/**
+	 * @enable: Bitmask of specific enabled events.
+	 *
+	 * For some events we need to track their state and do some internal
+	 * house keeping.
+	 *
+	 * Each engine event sampler type and event listed in enum
+	 * i915_pmu_tracked_events gets a bit in this field.
+	 *
+	 * Low bits are engine samplers and other events continue from there.
+	 */
+	u32 enable;
+
+	/**
+	 * @timer_last:
+	 *
+	 * Timestmap of the previous timer invocation.
+	 */
+	ktime_t timer_last;
+
+	/**
+	 * @enable_count: Reference counts for the enabled events.
+	 *
+	 * Array indices are mapped in the same way as bits in the @enable field
+	 * and they are used to control sampling on/off when multiple clients
+	 * are using the PMU API.
+	 */
+	unsigned int enable_count[I915_PMU_MASK_BITS];
+	/**
+	 * @timer_enabled: Should the internal sampling timer be running.
+	 */
+	bool timer_enabled;
+	/**
+	 * @sample: Current and previous (raw) counters for sampling events.
+	 *
+	 * These counters are updated from the i915 PMU sampling timer.
+	 *
+	 * Only global counters are held here, while the per-engine ones are in
+	 * struct intel_engine_cs.
+	 */
+	struct i915_pmu_sample sample[__I915_NUM_PMU_SAMPLERS];
+	/**
+	 * @sleep_last: Last time GT parked for RC6 estimation.
+	 */
+	ktime_t sleep_last;
+	/**
+	 * @irq_count: Number of interrupts
+	 *
+	 * Intentionally unsigned long to avoid atomics or heuristics on 32bit.
+	 * 4e9 interrupts are a lot and postprocessing can really deal with an
+	 * occasional wraparound easily. It's 32bit after all.
+	 */
+	unsigned long irq_count;
+	/**
+	 * @events_attr_group: Device events attribute group.
+	 */
+	struct attribute_group events_attr_group;
+	/**
+	 * @i915_attr: Memory block holding device attributes.
+	 */
+	void *i915_attr;
+	/**
+	 * @pmu_attr: Memory block holding device attributes.
+	 */
+	void *pmu_attr;
+};
+
+#ifdef CONFIG_PERF_EVENTS
+int i915_pmu_init(void);
+void i915_pmu_exit(void);
+void i915_pmu_register(struct drm_i915_private *i915);
+void i915_pmu_unregister(struct drm_i915_private *i915);
+void i915_pmu_gt_parked(struct drm_i915_private *i915);
+void i915_pmu_gt_unparked(struct drm_i915_private *i915);
+#else
+static inline int i915_pmu_init(void) { return 0; }
+static inline void i915_pmu_exit(void) {}
+static inline void i915_pmu_register(struct drm_i915_private *i915) {}
+static inline void i915_pmu_unregister(struct drm_i915_private *i915) {}
+static inline void i915_pmu_gt_parked(struct drm_i915_private *i915) {}
+static inline void i915_pmu_gt_unparked(struct drm_i915_private *i915) {}
+#endif
+
+#endif