2 * SPDX-License-Identifier: MIT
4 * Copyright © 2017-2018 Intel Corporation
10 #include <linux/hrtimer.h>
11 #include <linux/perf_event.h>
12 #include <linux/spinlock_types.h>
13 #include <drm/i915_drm.h>
15 struct drm_i915_private;
18 __I915_SAMPLE_FREQ_ACT = 0,
19 __I915_SAMPLE_FREQ_REQ,
21 __I915_SAMPLE_RC6_ESTIMATED,
22 __I915_NUM_PMU_SAMPLERS
26 * How many different events we track in the global PMU mask.
28 * It is also used to know to needed number of event reference counters.
30 #define I915_PMU_MASK_BITS \
31 ((1 << I915_PMU_SAMPLE_BITS) + \
32 (I915_PMU_LAST + 1 - __I915_PMU_OTHER(0)))
34 struct i915_pmu_sample {
40 * @node: List node for CPU hotplug handling.
42 struct hlist_node node;
48 * @lock: Lock protecting enable mask and ref count handling.
52 * @timer: Timer for internal i915 PMU sampling.
56 * @enable: Bitmask of all currently enabled events.
58 * Bits are derived from uAPI event numbers in a way that low 16 bits
59 * correspond to engine event _sample_ _type_ (I915_SAMPLE_QUEUED is
60 * bit 0), and higher bits correspond to other events (for instance
61 * I915_PMU_ACTUAL_FREQUENCY is bit 16 etc).
63 * In other words, low 16 bits are not per engine but per engine
64 * sampler type, while the upper bits are directly mapped to other
69 * @enable_count: Reference counts for the enabled events.
71 * Array indices are mapped in the same way as bits in the @enable field
72 * and they are used to control sampling on/off when multiple clients
73 * are using the PMU API.
75 unsigned int enable_count[I915_PMU_MASK_BITS];
77 * @timer_enabled: Should the internal sampling timer be running.
81 * @sample: Current and previous (raw) counters for sampling events.
83 * These counters are updated from the i915 PMU sampling timer.
85 * Only global counters are held here, while the per-engine ones are in
86 * struct intel_engine_cs.
88 struct i915_pmu_sample sample[__I915_NUM_PMU_SAMPLERS];
90 * @suspended_jiffies_last: Cached suspend time from PM core.
92 unsigned long suspended_jiffies_last;
94 * @i915_attr: Memory block holding device attributes.
98 * @pmu_attr: Memory block holding device attributes.
103 #ifdef CONFIG_PERF_EVENTS
104 void i915_pmu_register(struct drm_i915_private *i915);
105 void i915_pmu_unregister(struct drm_i915_private *i915);
106 void i915_pmu_gt_parked(struct drm_i915_private *i915);
107 void i915_pmu_gt_unparked(struct drm_i915_private *i915);
109 static inline void i915_pmu_register(struct drm_i915_private *i915) {}
110 static inline void i915_pmu_unregister(struct drm_i915_private *i915) {}
111 static inline void i915_pmu_gt_parked(struct drm_i915_private *i915) {}
112 static inline void i915_pmu_gt_unparked(struct drm_i915_private *i915) {}