diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_pmu.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_pmu.h | 111 |
1 files changed, 111 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 000000000000..40c154d13565 --- /dev/null +++ b/drivers/gpu/drm/i915/i915_pmu.h @@ -0,0 +1,111 @@ +/* + * Copyright © 2017 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + */ +#ifndef __I915_PMU_H__ +#define __I915_PMU_H__ + +enum { + __I915_SAMPLE_FREQ_ACT = 0, + __I915_SAMPLE_FREQ_REQ, + __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 \ + ((1 << I915_PMU_SAMPLE_BITS) + \ + (I915_PMU_LAST + 1 - __I915_PMU_OTHER(0))) + +struct i915_pmu_sample { + u64 cur; +}; + +struct i915_pmu { + /** + * @node: List node for CPU hotplug handling. + */ + struct hlist_node node; + /** + * @base: PMU base. + */ + struct pmu base; + /** + * @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 all currently enabled events. + * + * Bits are derived from uAPI event numbers in a way that low 16 bits + * correspond to engine event _sample_ _type_ (I915_SAMPLE_QUEUED is + * bit 0), and higher bits correspond to other events (for instance + * I915_PMU_ACTUAL_FREQUENCY is bit 16 etc). + * + * In other words, low 16 bits are not per engine but per engine + * sampler type, while the upper bits are directly mapped to other + * event types. + */ + u64 enable; + /** + * @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]; +}; + +#ifdef CONFIG_PERF_EVENTS +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 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 |
