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 #define I915_ENGINE_SAMPLE_COUNT (I915_SAMPLE_SEMA + 1)
36 struct i915_pmu_sample {
42 * @node: List node for CPU hotplug handling.
44 struct hlist_node node;
50 * @lock: Lock protecting enable mask and ref count handling.
54 * @timer: Timer for internal i915 PMU sampling.
58 * @enable: Bitmask of all currently enabled events.
60 * Bits are derived from uAPI event numbers in a way that low 16 bits
61 * correspond to engine event _sample_ _type_ (I915_SAMPLE_QUEUED is
62 * bit 0), and higher bits correspond to other events (for instance
63 * I915_PMU_ACTUAL_FREQUENCY is bit 16 etc).
65 * In other words, low 16 bits are not per engine but per engine
66 * sampler type, while the upper bits are directly mapped to other
74 * Timestmap of the previous timer invocation.
79 * @enable_count: Reference counts for the enabled events.
81 * Array indices are mapped in the same way as bits in the @enable field
82 * and they are used to control sampling on/off when multiple clients
83 * are using the PMU API.
85 unsigned int enable_count[I915_PMU_MASK_BITS];
87 * @timer_enabled: Should the internal sampling timer be running.
91 * @sample: Current and previous (raw) counters for sampling events.
93 * These counters are updated from the i915 PMU sampling timer.
95 * Only global counters are held here, while the per-engine ones are in
96 * struct intel_engine_cs.
98 struct i915_pmu_sample sample[__I915_NUM_PMU_SAMPLERS];
100 * @sleep_last: Last time GT parked for RC6 estimation.
104 * @i915_attr: Memory block holding device attributes.
108 * @pmu_attr: Memory block holding device attributes.
113 #ifdef CONFIG_PERF_EVENTS
114 void i915_pmu_register(struct drm_i915_private *i915);
115 void i915_pmu_unregister(struct drm_i915_private *i915);
116 void i915_pmu_gt_parked(struct drm_i915_private *i915);
117 void i915_pmu_gt_unparked(struct drm_i915_private *i915);
119 static inline void i915_pmu_register(struct drm_i915_private *i915) {}
120 static inline void i915_pmu_unregister(struct drm_i915_private *i915) {}
121 static inline void i915_pmu_gt_parked(struct drm_i915_private *i915) {}
122 static inline void i915_pmu_gt_unparked(struct drm_i915_private *i915) {}